2024 | 2ページ目 (6ページ中)

Cartridge dust collectors use cartridges as filtering elements and employ pulse jet technology. They offer significant advantages, such as small size, high efficiency, low investment, and easy maintenance. As a result, they have become an important choice in the industrial dust collection field. In recent years, new technologies and materials have improved the structure and filter media of cartridge dust collectors, leading to widespread applications in industries like セメント, スチール, パワー, food, metallurgy, and chemicals.

Structural Optimization and Wide Application

The overall capacity of cartridge dust collectors has increased several times, now exceeding 2000 square meters of filtration area (according to GB6719-86 standards). Compared to traditional dust collectors, they collect fine dust more effectively. They address issues such as high filtration velocity, poor cleaning efficiency, easy wear and tear of filter bags, and high operational costs. Compared to various bag and electrostatic dust collectors on the market, cartridge dust collectors provide larger effective filtration areas, lower pressure differentials, reduced emissions, smaller sizes, and longer service lives. This makes them a new direction in industrial dust collector development.

Importance of Pulse Jet Pressure

The pulse jet pressure in cartridge dust collectors refers to the high-pressure air injected into the cartridge through an electromagnetic pulse valve. This parameter is crucial for the normal operation of the dust collector, directly affecting dust removal efficiency and service life. Both excessively high and low pulse jet pressures can lead to cartridge blockage or damage, impacting dust collection effectiveness.

Normal Range for Pulse Jet Pressure

Typically, the pulse jet air pressure for cartridge dust collectors should remain between 5 to 7 kg/cm². This pressure range ensures effective cleaning of the cartridges while preventing excessive impact.

Factors Affecting Pulse Jet Pressure

Several factors influence pulse jet pressure, including air source pressure, cartridge material, filtration area, and operating environment. For example, the stability of the air source pressure directly affects fluctuations in pulse jet pressure, while the quality of the cartridge material affects its response to the pulse backflow.

Steps to Adjust Pulse Jet Pressure

To ensure optimal performance of the cartridge dust collector, follow these steps to adjust the pulse jet pressure:

Start the main power of the cartridge dust collector and adjust the cleaning controller.
Listen for sounds and observe the nozzle to check if the electromagnetic pulse valve operates correctly.
Check the pulse jet pressure gauge to ensure its reading falls within the normal range.

Maintenance of Pulse Jet Pressure System

Regularly checking and maintaining the pulse jet pressure system is vital for keeping the cartridge dust collector performing at its best. Here are some maintenance tips:

Regularly check the air source pressure gauge to ensure it remains stable within the set range.
Clean or replace the electromagnetic pulse valve to prevent blockages or damage.
Regularly inspect the wear condition of the cartridges and replace them as necessary.

結論

As industrial demand continues to grow, cartridge dust collectors are becoming the preferred equipment for dust collection in various industries due to their efficiency, energy savings, and ease of maintenance. By properly adjusting and maintaining the pulse jet pressure, you can maximize the performance of the dust collector and ensure a clean and safe production environment. If you have any questions about cartridge dust collectors or need professional advice, please feel free to お問い合わせ.私たちがお手伝いします！

12/11

2024

12/11/2024

Bucket elevators are continuous conveying machines that use a series of buckets attached to a non-ending traction element to vertically lift materials. It transports bulk materials in a vertical or near-vertical direction. During normal operation, bucket elevators may encounter various issues. This is normal, just like how people sometimes feel unwell. With proper maintenance, you can effectively manage these problems. However, improper maintenance can lead to significant damage. Below, we will discuss common problems with bucket elevators and their solutions.

1. Unusual Noises During Bucket Elevator Operation

Collision Sounds: If the base plate collides with the bucket, adjust the base's tensioning device to ensure the chain is properly tightened.
Drive Shaft Issues: If the driven shaft key is loose or the sprocket is misaligned, it can cause the bucket to collide with the housing. Adjust the sprocket position and tighten the key.
Guide Plate Collision: If the guide plate collides with the bucket, adjust the position of the guide plate.
Material Jam: If material gets trapped between the guide plate and the bucket, increase the material input angle at the base.
Bearing Failures: If a bearing fails and cannot operate smoothly, replace it immediately.
Foreign Objects: If material blocks or other debris get stuck in the housing, stop the machine and clear the blockage.
Sprocket Profile Issues: If the sprocket teeth are misaligned, repair or replace the sprocket.
Chain Adjustment: If the drive chain slips, adjust the chain length.
Incorrect Housing Installation: If the housing isn’t installed properly, adjust its vertical alignment.

2. Vibration of the Motor Base

Motor Malfunctions: Check the motor rotor to ensure it has proper static balance.
Installation Accuracy: If you find poor accuracy in the reducer and motor installation, adjust them accordingly.
Base Leveling: If the motor base isn’t level, readjust it to meet specifications.
Sprocket Installation Errors: If the drive sprocket is incorrectly installed, reinstall it.
Sprocket Profile Correction: If the sprocket profile is poor, correct its shape.
Sprocket Tightness: If the drive sprocket's tightness is inappropriate, adjust it again.

3. Dust Leakage

Damaged Seals: If the flange seal on the housing is damaged, replace it with a new seal, apply sealant, and retighten the flange bolts.
Material Leakage: If material leaks from gaps in the head or housing, add seals or apply sealant.
Excessive Drop Height: If the drop height of the material is too great, change the feeding method and add a buffering device.

4. Insufficient Lifting Capacity

Material Adhesion: If material sticks to the buckets or chutes, clean them regularly.
Insufficient Capacity: If the front equipment doesn’t have enough capacity, increase its production capability.
Slow Lifting Speed: If the lifting speed is slow, adjust the sprocket speed ratio.
Measurement Issues: If the measurement method is incorrect, check the measuring device and verify the material density, then correct the calculation method.

5. Insufficient Material Discharge

Insufficient Rear Capacity: If the rear equipment lacks capacity, enhance its production capability.
Discharge Chute Issues: If the discharge chute is too small or at an incorrect angle, correct its angle.
Adhesive Material Cleanup: Regularly clean the adhesive material from the chute and buckets.

By summarizing these common issues and their solutions, we hope to help you maintain your bucket elevators effectively and ensure its normal operation. If you have any other questions, feel free to consult us!

12/10

2024

12/10/2024

についてスターディスチャージバルブ, also known as the rotary discharge valve, is widely used in industries such as chemicals, coal, metallurgy, and food processing. It is usually installed at the inlet or outlet of other equipment, such as the outlet of bag filters and the inlet of pneumatic conveying systems. The main function of this valve is to ensure that powdered materials flow from the upper end to the lower end under gravity. It also isolates the gas systems above and below, preventing interference.

Structure and Principle of the Star Discharge Valve

The star discharge valve is a key device in the transportation of powdered or fine particulate materials. It acts as a transitional device that effectively isolates the gas phases of two systems. Typically, the star discharge valve is installed vertically, with the valve shaft positioned horizontally, allowing gravity to continuously transport materials from the top to the bottom.

This valve consists of a housing, an impeller rotor, shaft seals, bearings, and a drive motor. During operation, fine powders or particles fall into the impeller slots under gravity. The rotating impeller then sends the materials to the lower collection hopper or pneumatic conveying system. Throughout this process, the impeller maintains gas isolation between the upper and lower sections by fitting closely with the inner wall of the housing.

Analysis of Axial Leakage Causes

Common faults during the operation of the star discharge valve include seal failure, bearing wear, and impeller jamming. Among these, axial leakage is the root cause of these issues. Seal failure typically arises from axial leakage of materials, which in turn leads to bearing wear and impeller jamming.

Causes of Seal Failure

A newly installed star discharge valve usually does not show axial leakage in the early stages of use. However, as usage time increases, leakage gradually worsens. When inspecting the sealing surface of the impeller shaft, noticeable wear marks can be observed. Statistical analysis indicates that the strength and hardness of powder particles significantly affect the valve's lifespan. High-hardness catalytic cracking catalyst powders can easily wear down the sealing surfaces during continuous friction, leading to leakage.

Structural Improvement Solutions

To address the leakage issue of the star discharge valve, the following effective improvement measures can be implemented:

1. Improve the Wear Resistance of the Impeller Rotor Shaft

Enhancing the wear resistance of the impeller rotor shaft surface is essential for extending the equipment's lifespan. Increasing the surface hardness of the shaft, ensuring it exceeds the hardness of the powder material, can effectively reduce wear. This can be achieved by:

Using high-strength alloy steel materials, such as 2Cr13 or 3Cr13, and applying heat treatment.
Implementing surface treatments like chrome plating, hard alloy spraying, or laser cladding.

2. Improve the Structure of the Impeller Rotor Shaft

Designing the impeller rotor shaft as a split structure can reduce maintenance costs and time. Using threaded connections allows for quick replacement of the shaft heads when seals fail, minimizing the risk of replacing the entire unit. Ensuring that the thread direction matches the motor's rotation can also prevent failures due to jamming.

After these structural improvements, the star discharge valve has operated for over a year without any axial leakage, significantly extending its lifespan.

結論

Through in-depth analysis of the faults in the star discharge valve, we identified the root causes of axial material leakage and developed effective improvement measures. These not only extend the equipment's lifespan but also reduce maintenance costs. The key measures are:

1.Increase the hardness of the sealing surfaces to enhance wear resistance, significantly extending the equipment's lifespan.

2.Use a split structure for the sealing shafts to lower maintenance costs and reduce repair time.

With these improvements, the performance of the star discharge valve has significantly enhanced, providing more reliable solutions for material transport in relevant industries. For more information about our products or services, please お問い合わせ. We look forward to providing you with quality solutions!

12/09

2024

12/09/2024

はじめに

Company S operates six Φ18×35 cement silos. As shown in the diagram, there are air transport chutes under silos 1, 2, 3, and 4, 5, 6 to convey materials to the outside elevator. In August 2020, the company planned to increase its cement varieties. This required transferring cement from silo 4 to the chute under silos 1, 2, and 3. Due to the high transfer volume (300 m³/h) and the small height difference between the feed and discharge points, installing an air transport chute was not feasible. Other equipment options were either energy-intensive, prone to wear, or incompatible, making the selection and design process difficult.At this point, the storage and transportation department learned about ダーコ's air chain conveyor. They contacted Darko's technical team. After a site survey and extensive discussions, they finalized the technical plan to use the air chain conveyor. The order was placed at the end of 2020. Due to tight production schedules, installation only started in July 2021 and was completed within the month. The system performed exceptionally well and met all expectations. Here are the key technical features of the project:

1. Guaranteed Process Height

The air chain conveyor can transport materials horizontally. The design moves material from silo 4 to the chute under silo 2. This setup involves an approximately 135° bend. To save on height, we implemented two measures:

First, we changed the feed method at the inlet of the first air chain conveyor from the usual top feed to a side feed. This adjustment allows the material to drop directly from the silo's discharge valve to the side of the equipment, saving about 500 mm of space.

Second, at the junction of the two air chain conveyors, we switched from the typical vertical overlap to a horizontal overlap. The discharge from the first conveyor feeds into the side of the second conveyor. Due to the 135° angle, this horizontal overlap created a triangular area where material could accumulate, potentially hindering transport. To prevent material buildup, we installed an air cushion at the junction, supplied by a common Roots blower. This significantly reduced resistance, ensuring smooth material flow. As a result, this design saved about 1000 mm in process height, allowing material from silo 4 to enter the chute under silo 2 smoothly.

2. Rational Equipment Selection

For a transfer volume of 300 m³/h, a simple layout with a single device and minimal angles could typically use the FUK630 model. However, given the current process requirements, particularly the 135° junction and end discharge, we opted for the FUK800. After several months of operation, we found that this model met the 300 m³/h requirement and handled sudden increases in pressure within the silo without causing blockages.

3. Low Energy Consumption

The specifications for the two air chain conveyors are as follows: the first is FUK800×13.5 meters with a power of 5.5 kW, and the second is FUK800×31.7 meters with a power of 11 kW. Both conveyors share a single 18.5 kW Roots blower for air supply, resulting in a total transport distance of 45.2 meters and total power consumption of 35 kW. This is slightly higher than the FUK630 (30 kW) but significantly lower than traditional chain conveyors (75–90 kW), achieving over 50% energy savings. Additionally, the slightly lower chain speed enhances the lifespan of the conveyor while maintaining complete shell sealing, meeting all environmental standards.

結論

While selecting high-performance equipment is essential, the design of the process based on equipment characteristics and site conditions is equally important. The success of the technical solutions depends on how well the equipment features align with the specific situation. Many users prioritize this aspect. Design experience is also invaluable in this process, so it is crucial to choose not only the right equipment but also an experienced manufacturer.

If you are interested in our technical solutions or need further information, please feel free to お問い合わせ. We are happy to help!

12/06

2024

12/06/2024

Since the commissioning in May 2007, Company A's cement pre-grinding system has faced frequent failures with the roll press. These issues include low and unstable working pressure on both sides, improper adjustment of the material distribution valve, large particle size of the material exiting the roll press, low hourly output, high grinding energy consumption, and poor overall economic efficiency. This article will share our experiences and improvement measures in controlling the roll press.

Problem Analysis and Solutions

1. Causes and Adjustments for Unstable Pressure

Material enters the roll press between the moving and fixed rollers through the upper feeding chute. We found that the material adjusting plate on the moving roller side extended toward the fixed roller. This caused the discharge point to shift toward the fixed roller. As a result, there was too much material on the fixed roller side and almost none on the moving roller side. This uneven distribution led to unstable pressure and ultimately resulted in large particle sizes in the output.

To solve this problem, in August 2010, Darko adjusted the material adjusting plate on the moving roller side. We moved its position from the fixed roller side to the outside of the moving roller. We also changed its angle from 45° to 60°. Additionally, we adjusted the initial roller gap to 10 mm. This allowed the material to flow properly between the rollers and distribute evenly, thereby controlling pressure fluctuations.

2. Causes and Adjustments for Low Working Pressure

After careful observation of the roll press and hydraulic system, we found that the initial pressure on both sides of the system was 6.0 MPa. The equipment could only start when the pressure was loaded to 5.5 to 6.5 MPa. The operators typically increased the pressure to 6.0 MPa and then stopped. Due to the limitations of the initial roller gap, the oil pressure in the hydraulic cylinder was insufficient at 6.0 MPa. Even if the roller gap increased, the pressure could not reach the working pressure of 8.2 MPa.

We realized that the initial pressure had a significant impact on the working pressure. Therefore, we adjusted the initial pressure to 6.5 MPa while stabilizing the material flow at the inlet. After this adjustment, the working pressure on both sides increased from 7.4 to 7.8 MPa to 8.2 to 8.6 MPa, resulting in a noticeable reduction in particle size.

3. Adjusting the Material Distribution Valve

During the grinding process, the material forms a cake and discharges from the lower part between the two rollers. With sufficient feeding, the material is effectively pressed. However, the pressing effect on the edge material is not as good as that on the center material. The role of the material distribution valve is to separate well-pressed material from poorly pressed material.

We mistakenly believed that a smaller opening of the distribution valve was better and adjusted it to 20%. As a result, the finished product contained coarse material around 10 mm. Upon inspecting the side door of the roll press, we found significant material buildup in the edge chute, which hindered smooth flow. After making further adjustments, we discovered that setting the distribution valve opening to 23% eliminated the material buildup, allowing smooth entry into the return belt.

結論

Through these measures, we successfully reduced the average particle size of the clinker from the roll press from 3.81 mm to 1.54 mm. The crushing ratio improved from 4.09 to 10.10. The appearance of the ground material became powdery, and most particles could be easily crushed by hand. Additionally, the hourly output of the ボールミル increased by 13.1%, and the system's grinding energy consumption decreased by 16.6%. These improvements significantly enhanced the system's economic efficiency and operational stability. If you face similar issues, please feel free to お問い合わせ. We are happy to help!

12/05

2024

12/05/2024

When selecting a pulse bag dust collector, you need to consider multiple factors. This ensures the chosen equipment meets actual production needs and achieves efficient, stable, and economical operation. Here are some key selection steps and important notes:

1. Clarify Working Conditions

1.1 Handling Airflow

Determine the airflow that the dust collector needs to handle. This is the foundation for selection. Airflow directly impacts the specifications and performance of the dust collector. Consider the size of the hood, the distance from the dust emission point, and the filtering wind speed to accurately estimate the required airflow.

1.2 Dust Characteristics

Understand the characteristics of the dust, such as particle size, concentration, temperature, humidity, and viscosity. Choose suitable filter materials based on the dust properties, such as polyester, aramid, or fiberglass. For high temperature, high humidity, or highly corrosive dust, select materials that are heat-resistant and corrosion-resistant.

2. Determine Dust Removal Efficiency and Emission Standards

2.1 Dust Removal Efficiency

Select a dust collector model that can meet the required efficiency for production. Pulse bag dust collectors typically achieve over 99% efficiency, but this depends on dust characteristics and equipment configuration.

2.2 Emission Standards

Clarify the emission standards for the dust collector to ensure compliance with national or local environmental regulations. Set efficiency goals based on these standards and select the appropriate filtering efficiency level.

3. Consider Cleaning Methods and Filter Area

3.1 Cleaning Method

Pulse jet cleaning is the most common method for pulse bag dust collectors. Compressed air is injected into the filter bag through a pulse valve for cleaning. Ensure the reliability of the cleaning system and set a reasonable cleaning cycle for maintenance convenience.

3.2 Filter Area

Calculate the required filter area based on the handling airflow and filtering wind speed. The size of the filter area directly affects the dust collector's efficiency and investment costs.

4. Equipment Layout and Installation

4.1 Installation Location

Determine the installation location and space size for the dust collector based on the layout of the production workshop and equipment placement. Consider the inlet and outlet positions and duct layout to minimize airflow resistance and leakage.

4.2 Duct Layout

Design the inlet and outlet positions and duct layout to ensure smooth airflow. If necessary, set up air valves and adjustment devices to control airflow distribution and volume.

5. Economic Evaluation

5.1 Cost-Effectiveness

Evaluate the costs of the dust collector, including equipment, installation, operation, and maintenance. Choose a dust collector with high cost-effectiveness to reduce investment costs. Also, assess energy consumption and filter replacement cycles to ensure long-term economic operation.

5.2 Energy-Saving Measures

Consider implementing energy-saving measures and efficient cleaning systems to lower operating costs.

6. Other Considerations

6.1 Safety Measures

For operations involving toxic or explosive materials, select a dust collector with appropriate safety features. Ensure that the dust collector meets relevant standards for explosion-proof and toxic prevention measures.

6.2 Maintenance Convenience

Choose a dust collector that is easy to maintain to reduce maintenance costs and improve equipment reliability. Consider the convenience of フィルターバッグ replacement and cleaning system maintenance.

結論

In summary, selecting a pulse bag dust collector is a comprehensive process. You must consider working conditions, dust removal efficiency, cleaning methods, equipment layout and installation, economic evaluation, and other important factors. A well-structured selection process can ensure that the dust collector operates efficiently, stably, and economically in practical applications. Choosing the right pulse bag dust collector can enhance production efficiency and effectively protect the environment.For more information or assistance, please feel free to お問い合わせ. We look forward to providing you with professional solutions!

12/04

2024

12/04/2024

Boiler baghouse dust collector is key industrial equipment used in various boiler systems. Their main function is to filter and capture particulate matter from flue gases. This process effectively removes dust and improves emission quality, enhancing air quality and aiding environmental protection.

Considerations for Selecting a Boiler Baghouse Dust Collector

を選択する。 boiler baghouse dust collector, several factors must be considered to ensure optimal performance and compliance with environmental regulations.

1. Understanding Boiler Specifications

First, assess the boiler's combustion method and rated power. For example, for coal-fired boilers, it is important to understand the type of coal, combustion method, and flue gas volume. This information helps in selecting the right dust collector.

2. Following Environmental Policies

Next, be aware of local environmental policies and emission standards. Ensure that the selected dust collector meets these requirements. In areas with strict regulations, you may need a higher-performance dust collector to minimize environmental impact.

3. Analyzing Dust Characteristics

Additionally, understanding the physical and chemical properties of the dust is crucial. This knowledge helps in determining the right filter materials and cleaning methods. For flammable or explosive dust, choose a dust collector with explosion-proof features to ensure safety.

4. Considering the Process Flow

It is also important to understand the entire process flow. Determine the best location to install the dust collector for optimal effectiveness. In some processes, placing the dust collector before the flue gas discharge can reduce impacts on downstream equipment.

5. Impact of Climate Conditions

Moreover, consider local climate conditions such as temperature, humidity, and wind. Choose suitable materials and structures for the dust collector. In high-temperature and high-humidity areas, select collectors with waterproof and corrosion-resistant features to ensure stability and long-term performance.

6. Meeting Special Environmental Needs

Finally, for special situations like high temperature, high humidity, or corrosive environments, choose dust collectors with special functions. In corrosive environments, select collectors with anti-corrosion features to extend equipment lifespan.

Working Principle of Boiler Baghouse Dust Collectors

Boiler bag filters use the bag filtering principle to capture particulate matter from flue gases, purifying the gas and protecting the environment. After pre-treatment, flue gas enters the dust collector. The gas passes through the bag filter layer, where particles are trapped on the bag surface. The purified flue gas then exits through the outlet.

The bags of the dust collectors are made from high-temperature, abrasion-resistant materials. They can withstand the impact and wear of high-temperature flue gases. Additionally, the collectors use a compartmentalized stop-flow pulse jet cleaning method. This method provides long cleaning cycles and low energy consumption.

Furthermore, the dust collectors use a top-bag extraction method. During bag replacement, the framework can be easily removed, facilitating operation. The inlet and outlet passages are compactly arranged, leading to low airflow resistance. The equipment is equipped with insulation to prevent low temperatures from causing gas condensation.

結論

In summary, when selecting a boiler baghouse dust collector, consider various factors to ensure the equipment's performance and reliability. Make sure it meets environmental requirements. With the right selection and configuration, boiler bag filters can effectively improve emission quality and protect our environment.

ダーコ looks forward to providing you with professional solutions for boiler baghouse dust collectors! For more information or inquiries, please feel free to お問い合わせ!

12/03

2024

12/03/2024

Recently, a stone powder company in Shanxi, China, contacted us. They reported that after installing bulk loading equipment on their stone powder steel silo, their loading speed had significantly decreased. Sometimes, it took seven to eight hours to load a single truck, which severely limited their production capacity.

Before reaching out to us, this company had tried to communicate with other bulk machine manufacturers. They implemented several measures, such as adding a vibrator to the exterior of the silo cone and installing air supply nozzles and tanks inside. However, these efforts did not yield satisfactory results. Therefore, they requested ダーコ to provide a solution and sent photos and videos of the on-site equipment.

We took their feedback seriously. After carefully analyzing the provided information, we developed a targeted solution. Once we sent our quote, the company quickly signed the contract and made the payment to expedite the order.

After shipping the equipment, Darko arranged for technicians to go to the site for installation guidance. Due to limited space and a shortage of installation personnel, the construction took longer than expected. Our technicians stayed on-site for two days to ensure everything was installed correctly before returning.

About five days after the modifications were completed, the customer called to express their gratitude. They reported that the loading time for a truck of stone powder had now been reduced to around ten minutes, and they were very satisfied with the results.

Key Modifications for the Bulk Steel Silo

1.Installation of Air Supply Boxes:

We installed air supply boxes in suitable positions inside the silo cone, implementing zoned air supply to ensure that the powder material could be evenly fluidized.

2.Change of Air Source:

We replaced the original high-pressure air with a Roots blower. Although high-pressure air provided sufficient pressure, its airflow was too small to effectively fluidize the powder material. Additionally, high-pressure air contained moisture, which could cause the powder to clump and block the air supply layer. In contrast, the Roots blower provided a larger airflow and appropriate pressure, and it contained no moisture, making it ideal for this application.

3.Shortening of Vertical Pipe Length:

We shortened the vertical pipe length between the cone and the lower discharge gate. The original long vertical pipe could easily form dead zones under prolonged material pressure, which affected the normal flow of materials.

This modification not only improved the customer's loading efficiency but also demonstrated our commitment to addressing customer issues and providing solutions. If you face similar challenges or wish to enhance your production efficiency, please feel free to お問い合わせ! We look forward to providing you with professional solutions.

12/02

2024

12/02/2024

In modern industry, the efficiency of vertical grinding systems directly impacts production costs and energy consumption. Here are several effective strategies to reduce power consumption, minimize system resistance, and optimize daily operations.

1. Reduce Main Motor Current

Use mechanical lifting for material handling to lower power consumption more effectively than air lifting. This method reduces the internal circulation load of the バーチカルミル, enhances grinding efficiency, and decreases equipment resistance. Most vertical mills today have external circulation elevators. However, you need to find the optimal balance between external circulation and system output through ongoing exploration during production.

Theoretically, a lower material layer will yield a significantly lower motor current than a higher layer. Therefore, controlling the material layer thickness is crucial. Adjust this thickness using the dam ring. By optimizing the dam ring height, you can achieve a more appropriate thickness for the material layer within the mill. A reduced layer thickness increases the effective force within a unit volume of material, lowers the hydraulic cylinder’s working pressure, and reduces the pressure difference in the mill, leading to lower main motor current.

When selecting equipment and designing processes, consider the appropriate ratio of external circulation and the suitable air velocity of the nozzle ring. Ensure that the capacity of the external circulation elevator matches the system requirements. Additionally, controlling the air volume is essential to prevent excessive fine powders during discharge.

2. Lower System Resistance

The energy consumed by the circulating fan is closely linked to wind pressure, airflow, and fan efficiency. When system resistance is high, fan efficiency decreases, leading to increased current draw. Therefore, reducing system resistance is essential for enhancing fan efficiency and lowering current consumption.

Identify the primary sources of resistance by installing pressure detection devices at key locations: the hot air inlet, classifier outlet, cyclone outlet, and nozzle ring outlet. Comparing pressure differentials at these locations will help pinpoint the main sources of resistance.

3. Address System Air Leaks

Air leaks in the vertical mill system primarily occur in the mill and the dust collector. Ensure that the leak rate remains below 8%. Key leak sources include lock air devices at the mill inlet, roller seals, connection flanges, and expansion joints. In dust collectors, significant leaks often occur at the casing cover and connection flanges.

Air leaks increase current consumption by the fan, escalate energy costs, and potentially impact the mill’s output. Therefore, timely management of air leaks is vital for improving system efficiency.

4. Daily Operational Insights

Control the particle size of incoming material, typically within 3% to 5% of the roller diameter. After wear occurs on the roller sleeves and grinding table liners, adjust the gap between the roller and the grinding table. Regularly check the accumulator pressure, maintaining it within 60% to 70% of the roller's working pressure.

Higher grinding pressure is not always beneficial. If the output reaches a critical value, further increases in motor current will worsen energy consumption and jeopardize safe operation. Therefore, determine the optimal pressure based on actual production conditions. Additionally, maintain the outlet gas temperature around 85°C to stabilize grinding and classification efficiency.

5. Central Control Operation Considerations

Grinding Pressure: Aim for a grinding pressure that does not exceed a certain critical value. Further increases can elevate the main motor current and energy consumption. Develop a curve that correlates pressure with output to optimize this aspect.

Outlet Gas Temperature: Keep the outlet gas temperature stable at around 85°C. Deviations can significantly impact grinding and classification efficiency.

Valve Settings: Open all valves, including the inlet air valve, circulation air valve, fan outlet valve, and bypass air valve, to minimize system resistance. To check if the bypass valve should remain open, close it and observe the inlet negative pressure. If it increases, re-open the bypass valve.

Negative Pressure Control: Maintain the negative pressure at the tail end of the dust collector within -500Pa. This pressure affects the volume of supplementary air entering the mill and reduces the current of the exhaust fan. If the negative pressure does not decrease, monitor the site and instruct the central control to gradually lower the tail discharge, addressing any areas where dust escapes.

Control Startup and Shutdown Times: Ensure that the time from starting the first auxiliary equipment to feeding the mill does not exceed 4 minutes. During shutdowns, if no maintenance is required, there is no need to empty the material from the mill.

By implementing these strategies, companies can significantly enhance the efficiency of their vertical grinding systems while lowering energy consumption and optimizing production processes. If you have any questions or need assistance in improving the efficiency of your vertical grinding system, please feel free to お問い合わせ. We are here to provide you with professional solutions!

11/29

2024

11/29/2024

粉体サイロは、工業企業にとって極めて重要な設備です。製造材料の均質化、貯蔵、バランスを担っています。これらのサイロは、様々なニーズに対応するため、様々な材質、容量、構造のものがあります。しかし、多くの企業が、貯蔵能力の低さ、均質化の悪さ、材料の排出の困難さといった問題に直面しています。このような問題は、しばしば正常な生産に支障をきたします。

多くの企業が技術革新を試みてきたが、成果は限定的だった。主な問題は設計思想にある。ここでは、粉体サイロの最適化に関する私の考えを紹介する：

1.放電コーンの設計

多くの粉体サイロには、排出口の上に排出コーンがあります。その目的は、サイロ内の原料の圧力を下げ、スムーズな流れを可能にすることです。しかし、現実はしばしば異なります。曝気排出システムを作動させなければ、原料が流れ出ることはほとんどありません。システムが作動している場合、過剰な圧力が制御を困難にします。

ディスチャージコーンを取り外し、出口に高効率フローバルブを取り付けることをお勧めします。このバルブは材料の圧力をリアルタイムで監視することができます。圧力が高すぎるか、材料レベルが上昇すると、バルブは素早く閉じます。圧力が下がったり、レベルが下がったりすると、バルブは開きます。このシステムは自動車のABSブレーキシステムのように機能し、材料の流れを効果的に制御する。

2.空気均質化の効果

空気均質化装置はどのようにして原料の均質化を実現するのか、お客様からよく質問を受けます。実はサイロ自体が均質化機能を持っているのです。材料がサイロに入って出て行く時、このプロセスは自己均質化です。均質化装置の主な役割は正常な排出を確保することであり、材料を強制的に混合することではありません。ガス混合にファンを使用すると、サイロの強度と効率に悪影響を及ぼす可能性があります。

空気均質化装置の真の目的は、原料を安定的に排出することです。これにより、サイロの自己均質化機能が正しく機能します。しかし、長期間使用していると、不適切な操作や原料の特性によって装置が故障することがあります。このような場合、サイロのメンテナンスや清掃が必要になります。

3.放電装置の最適化

排出装置には、ゲート、供給装置、計量装置、搬送装置が含まれる。先に述べたゲートとレベル制御システムを使用することで、均一な材料排出が可能になる。を使用することをお勧めする。エアスライドコンベヤを排出方法として採用した。この設計は、投資と運転コストが低く、密閉性が高く、レイアウトが柔軟なため人気がある。

しかし、エアスライドコンベアには欠点もある。硬い塊や湿った原料を扱うのに苦労することがある。そこで、エアチェーンコンベヤを使うことをお勧めする。この装置は、チェーンコンベヤとエアスライドコンベヤを組み合わせたものです。サイロベースの高さを下げながら、塊や水分を効果的に管理することができます。

有名な設計事務所によれば、エアチェーンコンベヤを使えば、建設コストを大幅に節約できるという。運転コストも比較的低いままだ。現在、より多くの設計事務所が従来のベルトコンベヤに代わってエアチェーンコンベヤを採用し、粉体輸送の効率と信頼性を向上させている。

結論

粉体サイロの設計と最適化は、工業生産の効率を高める鍵です。適切な設計と高度な設備により、企業はサイロの機能性を向上させ、原料の効率的な均質化と安定した排出を実現することができます。

サイロの設計や関連機器に関するご質問は、下記までお気軽にお問い合わせください。お問い合わせ.我々はダーコ私たちはプロフェッショナルなサポートとソリューションを提供します！

11/28

2024

11/28/2024

リバーシブルコンベヤは、主に正逆両方向に搬送物を搬送するニーズに対応します。リバーシブル・コンベヤは、短距離輸送に広く使用されている。しかし、輸送距離が長くなると、技術的な制約から用途が狭まる。2022年、C社は鉱物粉の貯蔵に、能力300t/h、距離70mの可逆式エアスライドコンベヤの使用を提案した。Darkoは短距離の可逆式コンベヤの経験があるがエアスライドコンベヤしかし、このような大容量で距離もあり、複数の放電点を持つという試みは、今回が初めてである。したがってダーコは以下の技術的な問題に焦点を当てた：

1.駆動システム設計

まず、コンベヤーの一端にドライブを設置することにした。この設計により、両端に2つの駆動部を設ける必要がなくなり、操作が簡素化される。一方の端が駆動しているとき、もう一方の端は停止したままです。この設定により、機械的な事故のリスクが軽減され、スムーズな生産が保証される。

次に、ドライブを真ん中に配置することを考えた。しかし、そうすると構造が複雑になり、チェーンへのストレスが増して寿命が短くなることがわかった。そこで、シンプルにするためにドライブを一端に配置することにした。

2.チェーンの張り

ワンエンドドライブを選択した時点で、チェーンの張り調整が重要になった。輸送距離が長いため、効果的なテンションが必要なのだ。私たちは、ウェイトテンショナーとスクリューテンショナーを含むリアテンショナーシステムを選択しました。評価の結果、摩耗を最小限に抑え、チェーンとコンポーネントの寿命を延ばすために、シンプルなリア・テンション方式を選択しました。

3.チェーン遷移の処理

駆動方法と張力調整方法を決定した後、私たちはチェーン・トランジションの取り扱いに集中しました。トランジションのハンドリングが悪いと、チェーンジャムを引き起こし、正常な運転に影響を及ぼします。リバーシブル走行では、上チェーンと下チェーンの両方のテンションを管理する必要があります。そこで、ドライブスプロケットとロアチェーンの間にトランジション構造を追加し、スムーズな作動を確保しました。

4.中間排出設計

リバーシブル・エアスライド・コンベヤは、貯蔵施設の最上部に設置される。そのため、複数の排出口に対応する必要があります。詰まりを防ぐため、排出口を中間に設置し、駆動スプロケットの下の開口部は常に開いているようにしました。この設計により、異なる種類の原料を管理し、製品の品質に影響を与える混合を防ぐことができます。私たちは、この問題を効果的に解決するために、中間排出口に高圧エアブローを導入しました。

結論

リバーシブルエアスライドコンベヤの設計最適化により、Darkoは安定した動作と効率的な材料進入を確保しながら、大容量かつ長距離輸送のニーズに応えます。私たちは、生産効率を向上させる高品質のソリューションを提供することをお約束します。詳細については、お気軽にお問い合わせください。お問い合わせ.

11/26

2024

11/26/2024

原料用竪型粉砕機は、竪型粉砕機における主要な粉砕機器である。セメント生産に直結する。操業の安定性は、生産効率と製品品質に直接影響する。しかし、多くの企業では、竪型ミルシステムの空気漏れの問題に直面することが多い。これはエネルギー消費を増加させるだけでなく、設備の故障につながる可能性もあり、生産ラインの継続性と信頼性に影響を与える。本稿では、原料の空気漏れの原因について分析する。垂直ミルそして、それに対応する解決策を提案する。

I.竪型ミルにおけるエア漏れの影響

1.エネルギー消費の増加：竪型ミルシステムの空気漏れは熱損失を引き起こす。ミルの内部温度は低下する。必要な温度を維持するためには、追加の熱風供給が必要となり、エネルギー消費量の増加につながる。

2.アウトプットの減少：空気が漏れると、原料の一部が失われる。粉砕機内の原料が減少すると負荷が下がり、生産量が低下する。

3.機器の故障：長時間の空気漏れは、内部部品、特にシールやパイプの摩耗を加速させる。これは機器の寿命を縮め、メンテナンスコストを増加させる。

4.製品の品質低下：空気漏れは原料の粉砕効率に影響し、製品が細かくなりすぎたり粗くなったりする。

II.竪型ミルにおける空気漏れの原因

1.シールの老朽化または損傷：ローラーシールやフィーダーシールなどのシールは、長期間の運転で老朽化したり破損したりして、空気漏れを引き起こすことがある。

2.パイプ接続の緩み：竪型ミルと集塵機の間の換気パイプの取り付けが緩かったり、接続が不適切な場合、空気漏れが発生することがあります。

3.ロック式フィーダーの不合理な設計：ブレード付き分割ホイールのような従来のロック式フィーダーは、隙間が大きすぎたり小さすぎたりすると、エア漏れを起こすことがある。

4.非効率的なローラーシール構造：現在のローラーシールのデザインは単純で、シール効果が低い。特に下部のシールではスペースが限られているため、効果的なシールを確保するのが難しい。

5.スラグ排出設計の欠陥：スラグ排出口からベルトコンベアへの直接シュートは、主要な漏出ポイントである。当初の設計で使用されていたシングル・フラップ・バルブは、大きな材料によって簡単に詰まってしまい、ミルが停止してしまう。

III.竪型ミルにおける空気漏れの解決策

1.老朽化したシールを交換する：効果的なシーリングを確保するため、老朽化または損傷したシールを定期的に点検し、交換する。

2.パイプの接続を強化する：換気パイプの接続が確実かつ堅固であることを確認するため、換気パイプを徹底的に点検し、緩んでいる接続部があれば補強する。

3.ロッキングフィーダー設計の最適化：ミルヘッドでマテリアルシールを実施する。空気漏れにつながる間隔の過不足を避けるため、分割ホイールの隙間を調整する。

4.ローラーシール構造の改善：ローラーシールを円形のシリコンウェーブシールに変更する。このデザインは、より優れた弾力性とシール効果を提供し、効果的に空気漏れを減らします。

5.スラグ排出口の再設計：排出ポートを無動力フラップロックバルブに変更する。この設計では、バルブ本体と材料カーテンを組み合わせ、システムの負圧を利用して密閉構造を作り、空気漏れの問題に効果的に対処する。

IV.ケーススタディ

4500 t/dのクリンカ生産ラインを持つセメント企業において、原料システムはTRM53.4原料竪型ミルを装備している。深刻な空気漏れのため、キルンテールの酸素含有量は10.3%に達し、原料プロセスの電力消費量は16.5kWh/tであった。循環ファンの電気消費量は8.6 kWh/tと高く、出力温度は45～55℃と低かった。

このため、原料工場の省エネルギーニーズは著しく制限されていた。空気漏れに対処し、ファンの効率を改善した後、この企業はロッキングフィーダーの交換、ローラーシールの改良、排出口の再設計などの対策を実施した。

その結果、空気漏れは大幅に減少し、電気消費量は3.8kWh/t減少し、出力温度は上昇し、時間当たりの生産量は向上した。これらのアップグレードの後、この企業は年間約258万元のエネルギーコストを節約し、大きな経済的利益を達成した。

V.結論

原料竪型ミルにおける空気漏れは、複雑かつ重大な問題である。企業は、設計、設置、メンテナンスなど、多方面からこの問題に取り組む必要がある。設備設計を最適化し、メンテナンスを強化し、シーリング効果を向上させることで、企業は効果的に空気漏れを減らし、竪型ミルの運転安定性を高め、生産効率を向上させることができる。装置の性能向上に関するご質問は、下記までお気軽にお問い合わせください。お問い合わせ. ダーコプロフェッショナルなソリューションとサポートを提供します。

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