How should the bag filter in the foundry workshop be maintained?1

The air inlet of the bag filter in the foundry is set on the ash hopper. When the dust-laden gas enters the ash hopper from the air inlet, it first hits the baffle at the end of the air inlet pipe. Due to the inertia effect, the coarse dust in the gas enters the ash hopper directly. , play the role of pre-dust collection. The airflow entering the ash hopper is then folded upward and passes through the filter bag with the metal frame inside. The dust is collected on the outer surface of the filter bag. The purified gas enters the clean room at the upper part of the filter bag room, and is collected into the air outlet pipe for discharge. The indoor dust collection bags are divided into several rows, and each row of dust collection bags is cleaned according to a given time interval. When the pulse valve is opened, high-pressure air is injected into the filter bag to remove the dust on the surface of the filter bag. The pulse injection width and ash cleaning cycle of each row of filter bags are automatically and continuously controlled by a dedicated ash cleaning program controller. The characteristics of the bag filter in the foundry: 1. The dust removal efficiency is high, and the dust removal efficiency can reach more than 90%. 2. The structure is relatively simple, the operation is relatively stable, the initial investment is small, and the maintenance is convenient. At present, most of the foundries in China use bag filter in the workshop to control the dust problem. However, if there are some obvious misoperations in the maintenance of dust removal equipment in the foundry workshop, it will have a negative impact on the bag filter, so we need to properly maintain the bag filter. How to maintain and repair the dust removal equipment and bag filter in the foundry workshop: 1. When maintaining and repairing the dust removal equipment and bag filter in the foundry workshop, the staff should first cut off the power supply and air source, and keep the air bag under normal pressure . 2. When carrying out internal maintenance and repair of the bag filter, the dust inside should be cleaned up, and it should be cleaned repeatedly after standing to ensure that there is no dust inside. 3. It is forbidden to use open flames in lighting facilities, and fire extinguishers should be equipped on the site of dust removal equipment in the workshop to prevent dust explosion accidents. In addition, the maintenance of dust removal equipment in the foundry workshop has some daily codes of conduct that need to be strictly followed: 1. Establish a regular maintenance system so that problems can be found in time and major accidents can be avoided. 2. It is forbidden to stack flammable and explosive items around the bag filter, and the ventilation should be good. 3. The staff should regularly check the sealing state of the bag filter and the running state of the air net (including the fan). 4. Regularly check the dust removal bag. If it is damaged, it should be replaced in time. The storage of the spare dust removal bag should also be dry, ventilated and dustproof, and it should be checked regularly. 5. Regularly clean up impurities and accumulated water in the air source processor. 6. Regularly refuel the transmission. After adding, be sure to pay attention to dust prevention. When closing the inspection port, you must install the gasket. 7. Keep the pulse controller and solenoid valve clean, free of dust and oil, and regularly check the control coil on the solenoid valve. 8. The dust layer on the surface of equipment and air ducts should be cleaned immediately. Supporting the production of dust filter bags in the bag filter, providing customers with exclusive customized services for dust collector bags to meet customers' needs for different working conditions, and has been fully recognized by the majority of users.