bag filter pulse valve: Make dust cleaning more accurate and energy-efficient
4 min readThe bag filter pulse valve plays a crucial role in the ash cleaning process, and its performance directly affects the operating efficiency, energy consumption and service life of the filter bags of the dust collector.
1. The flight clearance mechanism and effect of the pulse valve
The pulse valve forms a pulse airflow by releasing compressed air, which impacts the surface of the filter bag, causing the dust to fall off and restoring the filtration performance of the filter bag. This ash cleaning method is called "jet cleaning", and its core lies in the control of the opening and closing speed of the pulse valve, the jet pressure and the jet time.
2. Energy conservation and high efficiency of pulse valves
The use of pulse valves not only enhances the dust cleaning effect but also significantly reduces energy consumption. Studies show that the adoption of low-resistance pulse valves can reduce the consumption of compressed air, thereby lowering the overall energy consumption.
3. Service life and Maintenance of Pulse valves
The service life of a pulse valve is closely related to its structure and materials. The diaphragm of the pulse valve is a key component for its normal operation, and its service life directly affects the stability of the entire ash cleaning system. For example, pulse valves made of high-quality materials, such as the DMF-Z type electromagnetic pulse valve, have good anti-corrosion performance and are suitable for cleaning various filter bags and filter cartridges. In addition, the service life of pulse valves is usually over one million times, which indicates that they have high durability. However, excessive cleaning or improper cleaning frequency may cause diaphragm fatigue, thereby shortening the service life. Therefore, reasonably setting the pulse period and pulse time is the key to extending the service life of the pulse valve.
4. Selection and configuration of pulse valves
The selection of pulse valves needs to be based on the specific requirements of the dust collector. For instance, for dust collectors with large air handling volumes, large-sized pulse valves should be selected to reduce the maintenance workload of the entire system. In addition, the model and quantity of the pulse valves also need to be configured according to the number and arrangement of the filter bags. For example, the PPC32 dust collector is equipped with A 1.5-inch pulse valve in each chamber, while the PPC S/A 64 and PPC S/A 96 dust collectors are equipped with a 2.5-inch pulse valve in each chamber. The injection performance of pulse valves varies significantly, which mainly depends on the structure and material of the valve body. Therefore, when selecting the type, the appropriate pulse valve should be chosen based on the actual working conditions.
5. Control and Automation of Pulse Valves
Modern bag-type dust collectors usually adopt PLC programmable controllers for automatic control to achieve precise control of pulse valves. For instance, the PLC controller can automatically control the opening and closing of the pulse valve based on the set pulse cycle and pulse time, thereby achieving timed or fixed-resistance dust cleaning. In addition, the control signal of the pulse valve can also be adjusted through the solenoid valve to meet different dust cleaning requirements. For instance, the high-speed electromagnetic pulse valve enhances the injection effect by altering the opening and closing of the internal airflow channel. This automated control method not only enhances the efficiency of ash cleaning but also reduces manual intervention and improves the operational stability of the equipment.
6. Improvement and Innovation of Pulse Valves
In recent years, with the increasing performance requirements for bag-type dust collectors, the design and manufacture of pulse valves have also been continuously improved. For instance, the adoption of low-resistance pulse valves can enhance the tightness of the equipment, reduce air leakage, and thereby improve product quality. In addition, the structure of the pulse valve is constantly being optimized. For instance, the pulse valve with a double diaphragm structure can accelerate the opening and closing speed and enhance the dust cleaning effect. By improving the structure of the injection pipe, such as adopting the spray plug-in structure and the arc-shaped stretching nozzle, the injection resistance can be reduced and the injection effect can be improved. These improvement measures not only enhance the dust cleaning effect, but also reduce energy consumption and maintenance costs.
7. Standardization and specification of pulse valves
To ensure the performance and reliability of pulse valves, the relevant industries have formulated a number of standards and norms. For example, the performance parameters of pulse valves are defined in GB/T 16845-2017 "Terminology for Dust Collectors", including flow capacity, pulse interval, etc. In addition, the pulse valve should comply with the JB/T5916 standard to ensure its normal operation in the ash cleaning system. These standards and specifications provide a basis for the design and selection of pulse valves, which is conducive to improving the performance and reliability of the entire dust removal system.
Conclusion
It plays a crucial role in the bag filter pulse valve, and its performance directly affects the dust cleaning effect, energy consumption and filter bag life of the dust collector. By optimizing the structure, materials and control methods of the pulse valve, the ash cleaning effect can be significantly improved, energy consumption can be reduced, and the service life of the equipment can be prolonged. Therefore, when designing and selecting bag-type dust collectors, the performance and configuration of pulse valves should be fully considered to ensure the efficient operation of the entire system.
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Shanghai Bag Filtration Equipment Co., Ltd.
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