Bag dust collector is the main equipment in the dust removal system, and its service life is also very long, then, what factors are related to the dust removal efficiency of the bag dust collector? How to maintain the bag dust collector parts? The following is a small series to bring about the content of the dust collector, I hope to make everyone gain!
What factors are related to the dust removal efficiency of the bag dust collector
The dust removal efficiency of the bag dust collector mainly depends on the thickness of the dust layer of the bag dust collector and the dust bag. In general, the filter material is dense, the dust layer is thick, and the efficiency is high, but the corresponding treatment gas volume is reduced, that is, the filtration wind speed is low. How to improve the filtration speed while ensuring the efficiency and pressure loss of the dust collector is stable is a problem to be further studied. The improvement of the filtration speed depends on the cleaning method and performance of the filter material.
Early use of bag dust collector and bag dust chamber, no dust removal device, low filtration wind speed, that is, low processing gas capacity. The dust on the filter bag was removed by artificial method, and the wind speed was increased. And developed into a bag dust collector, intermittent intermittent vibration, filter wind speed significantly improved.
However, in order to remove the gas from the chamber, the cleaning method of the filter bag is carried out sequentially, and the dust collector does not fully play its role. In recent years, the development of cloth bag dust collector, such as pulse cloth bag dust collector, equipped with advanced ash cleaning device. The dust collector is used to continuously clean the filter bag without cutting off the treated gas.
After using compressed air R ash and high efficiency filter bag, the wind speed reaches 5 meters per minute. It has the advantages of large gas capacity, long service life, high dust removal efficiency and small maintenance gap.
Maintenance of bag dust collector parts
Under normal operating conditions, the maintenance of bag dust collector accessories is easy to be ignored, affecting the effective operation of dust removal equipment and reducing the efficiency of dust removal, so attention is paid to the maintenance and overhaul of dust collector accessories.
1, dust collector box
The box of the bag dust collector is fixed, the outside is subjected to wind and rain all the year round, the inside is polluted by the treatment of gas, and the conditions are quite harsh. The box maintenance of the dust collector is divided into two parts.
1) External maintenance
External maintenance is mainly to check the paint leakage, bolts and peripheral seals. For high temperature and high humidity gases, in order to prevent condensation and ensure that there is generally rock wool outside. Insulation such as glass wool and polyphenyl ester. After the insulation layer is wet by rain, it will accelerate the corrosion of the box, so the dust collector placed in the open place should be paid attention to when it rains.
2) Internal maintenance
The inside of the box is in an environment that is prone to condensation, adhesion dust and corrosion that may be caused by gas dissolution. The welding part between the steel plate and the steel plate and the Angle steel, the edge of the flower plate where the cloth bag is installed, are all very easy to be corroded. Therefore, the maintenance of the interior of the box is mainly to pay attention to the selection of corrosion-resistant paint, and paint in a timely manner in the easily corroded parts. Under normal circumstances, because the purification gas is mostly acidic, there are more acid-resistant coatings of epoxy resins.
2. Valve
Although the production valves of each manufacturer are not exactly the same, from the purpose of application, according to the purpose of the valve, some require good sealing performance, and some require that the specified position remain unchanged. Because of the poor sealing of the reversing valve of vibration cleaning, the cleaning effect is not good and the damage of the filter bag is promoted. Because of the poor sealing of the blowback valve, the cleaning effect is also bad.
Ongoing maintenance projects
1) Whether the valve opening and closing is flexible and accurate.
2) Water leakage, cooling displacement, drainage temperature.
3) The movement of the cylinder or electric cylinder of the drive device.
4) Tightness of the valve.
Maintenance items during parking
1) Deformation and damage.
2) The tightness and flexibility of the valve.
3) The purpose of the link of the electronic control part and the valve of the dust removal equipment is to release the explosion pressure into the atmosphere when an explosion occurs inside the valve to prevent all the devices from being destroyed. Although the possibility of valve action is very small, it is also regularly opened and closed by hand to check its action repeatedly. After the pressure of the valve is reduced, it should be able to automatically restore the position and close, so that the system continues to operate normally.
3. Ash hopper
The ash hopper is a device for storing dust, and too much dust accumulated in the ash hopper will block the inlet and become the cause of poor suction, so the ash in the ash hopper should be cleaned frequently. For suction work, if rainwater and moisture are inhaled from the ash vent, dust may be consolidated with the inner wall of the ash hopper, forming a blockage of the ash vent, so that the ash vent seal is intact.
4. Flight clearance mechanism
The type of bag dust collector is different, and the cleaning mechanism is different. The role of the cleaning mechanism is to effectively remove the dust on the bag and ensure the normal operation of the bag dust collector. The reading of the pressure differential meter generally installed on the control panel or the dust collector box indicates the quality of the cleaning effect. The resistance exceeds the specified value, indicating that the cloth bag hangs too much ash, at this time, the necessary adjustment or maintenance of the flight clearance mechanism should be carried out.
1) Vibration cleaning method for maintenance during parking
Vibration cleaning is generally divided chamber cleaning, cleaning the valve is closed, the air flow stops through, the role of mechanical vibration for cleaning, cleaning interval with a timer for automatic control. Therefore, the control panel, the valve of each chamber, the mechanical vibration device, the installation of cloth bags, etc., are maintained.
2) Reverse air cleaning method
In this way, metal rings are generally sewn into the cloth bag at a certain distance at intervals to reduce the wrinkle of the cloth bag and prevent the wear of the filter bag. The reverse air cleaning method achieves the purpose of cleaning dust by applying pressure in the opposite direction to the cloth bag.
3), gas ring back blowing ash method
In this way, the blowing ring moves up and down along the cloth bag, and the orifice of the blowing ring sprays air flow opposite to the direction of the treatment air flow to the cloth bag, and the purpose of cleaning ash has been achieved.
4), pulse blowing ash cleaning method
The purpose of ash cleaning is achieved by means of the high-speed air that is ejects from the spray tube instantaneously, and at the same time, the secondary air that is 5-7 times the spray volume is attracted to pass through the Venturi tube together to give the impact. This cleaning method has very few moving parts, and the maintenance of metal components is very little.
5. Cloth bag and hanging device
The bag is the heart of the dust collector, the performance of the dust collector is greatly affected, so we should pay attention to check often, the experience proves that the maintenance workload of the bag is a large part, the condition of the bag in operation, can be reflected by the pressure difference meter's water value and change, for the large bag dust collector every day to record the resistance value. Analyze and check the damage, deterioration and blockage of cloth bags in time and take corresponding measures.
The above describes the content of it, I hope to help you, our website also collated more information about the dust collector, want to know more friends remember to collect oh.