Industrial dust control is an important issue that cannot be ignored in industrial production. As an efficient dust removal device, the core of bag-type dust collectors lies in the dust cleaning technology of pulse valves. The pulse valve causes the filter bags to vibrate violently by instantaneously blowing compressed air, thereby peeling off the dust adhering to the filter bags and falling them into the ash hopper, achieving efficient dust removal. However, the performance of the pulse valve directly affects the dust removal effect, so choosing the appropriate pulse valve is of vital importance.
The types and functions of pulse valves
Pulse valves mainly come in two types: diaphragm type and piston type. The diaphragm type pulse valve controls the opening and closing of the airflow through an elastic diaphragm, while the piston type pulse valve achieves airflow control through the movement of the piston. In practical applications, the 1.5-inch double diaphragm pulse valve is widely regarded as a very important method for removing dust from filter bags due to its powerful "vibration wave" release capacity. This pulse valve can ensure that the airflow is released instantaneously and then quickly enters the blow pipe, thereby achieving thorough dust cleaning of the filter bags. In contrast, single-diaphragm valves or smaller-sized pulse valves are slightly inferior in terms of dust cleaning effect because they need to expel all the airflow while keeping the diaphragm closed, resulting in a slow release of the pulse airflow and affecting the dust cleaning effect.
2. Selection and Optimization of pulse valves
When choosing a pulse valve, a reasonable selection should be made based on factors such as the filtration area of the dust collector, dust concentration, and filtration air velocity. For instance, the submerged pulse valve is suitable for low-pressure applications due to its simple structure, low resistance, good fluidity and excellent injection effect. It can reduce energy consumption and extend the service life of the diaphragm. In addition, the 3-inch ASCO submerged pulse valve has performed well in the application of chemical plants, not only improving the dust removal efficiency but also reducing the maintenance cost. For large bag-type dust collectors, due to the large number of pulse valves used and the difficulty in intuitively monitoring their working conditions, intelligent pulse valves need to be adopted. By installing distance sensors and mobile communication networks, the self-monitoring and alarm functions of the pulse valve status can be achieved. This kind of intelligent pulse valve has been adopted by many enterprises, effectively enhancing the operational stability and safety of the equipment.
3. Faults and Maintenance of Pulse Valves
Although the pulse valve plays a crucial role in the dust removal system, it may also malfunction, such as the "bag sticking" phenomenon, where compressed air cannot be injected normally, resulting in an increase in system resistance. At this point, it is necessary to inspect components such as the air pressure balance hole, diaphragm, spring and magnet connection spring, and replace the damaged parts in a timely manner. In addition, abnormal operation of the lift valve is also a common problem, including valve plate detachment and cylinder action issues. These problems can be solved by adjusting the position of the valve plate, cleaning the interior of the cylinder, and replacing the sealing ring, etc. Regular maintenance and inspection are the keys to ensuring the normal operation of pulse valves.
4. The energy-saving and environmental protection advantages of pulse valves
The efficient dust cleaning capacity of the pulse valve not only enhances the dust removal efficiency but also reduces energy consumption. For instance, the adoption of high-speed electromagnetic pulse valves can significantly shorten the pulse width, reduce the consumption of compressed air, and simultaneously enhance the dust cleaning effect. In addition, the pulse bag filter does not require pre-dust removal equipment and can handle dust with a concentration as high as 1000mg/m³ at one time, making it suitable for a variety of industrial scenarios. In terms of environmental protection, the dust removal efficiency of pulse bag filters is usually above 90%, and even can reach over 99%, which can effectively reduce dust emissions and protect the environment and the health of employees.
5. Future development trends of pulse valves
With the development of industrial automation and intelligence, pulse valves are also evolving towards intelligence. For instance, the intelligent pulse valve developed by Suzhou Xiechang Environmental Protection Technology Co., Ltd. has achieved the self-monitoring and alarm functions of the pulse valve status by installing distance sensors and mobile communication networks. This intelligent pulse valve not only enhances the operational efficiency of the equipment but also reduces maintenance costs, providing more reliable technical support for industrial dust control.
Conclusion
The pulse valve, as the core component of the bag filter, its performance directly affects the dust removal effect. By choosing the appropriate type of pulse valve, optimizing the selection, conducting regular maintenance and intelligent transformation, the dust removal efficiency can be effectively enhanced, energy consumption can be reduced, the service life of the equipment can be prolonged, and a win-win situation of environmental protection and economy can be achieved. In the control of industrial dust, the ingenious approach of pulse valves is not only reflected in their highly efficient dust cleaning capacity, but also in their huge potential in energy conservation and environmental protection.
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