Design and application of bag-filter equipment for coal-fired boiler

Design and application of bag-filter equipment for coal-fired boiler

The bag-filter of coal-fired boiler is separated by inclined separator, with even distribution of air flow, which plays the role of pre-collecting dust and preventing Mars on dust-containing body, avoiding the direct scouring of the bag by dust, reducing the dust concentration of dust-containing gas, and prolonging the life of dust-collecting bag and electromagnetic pulse valve.

Baghouse dust collector for coal-fired boiler is a large dust removal equipment with large air volume, good cleaning effect, high dust removal efficiency, small footprint, stable operation, reliable performance and convenient maintenance. It is widely used in boiler, flue gas dust removal, material recovery and dust control in power, metallurgy, building materials, chemical industry and other industries.

The baghouse dust collector for coal-fired boiler is composed of dust collector body, protection system, compressed air system (including gas storage tank, oil-water separator, pipeline), control system (including instrument and meter, PLC cabinet, MCC cabinet, field operation cabinet), etc. According to the characteristics of coal-fired boiler using bag filter sets the flue gas temperature, humidity, dust catcher equipment running pressure testing, material level detection, fault detection and other advanced online testing, monitoring equipment, can finish the bag precipitator in all of the measurement, monitoring, control, alarm and protection and interlock functions, can monitor the operation of the dust collector.

Combined with the characteristics of the flue gas of coal-fired boilers in China, the bag-filter of coal-fired boilers adopts high-temperature and corrosion-resistant boiler filter material, and the fiber is treated with PTFE percolation film, which solves the problem of high temperature of boiler flue gas, the ordinary filter material can not bear and the short service life of ordinary filter material, and also takes into account the performance and price ratio of filter material. Imported new low resistance, high efficiency, long life diaphragm electromagnetic pulse valve reasonable selection, coupled with the unique design and processing means of the jet tube, so that the bag filter cleaning method has been completely changed. The application of the external bypass system, temperature and humidity measurement and other online detection equipment solves the problem of oil injection for boiler combustion and the protection of dust catcher when the boiler fails.

Through a series of considerations in equipment design, the bag-filter for coal-fired boiler ensures the safety and reliability of the overall resistance of the equipment from the aspects of equipment structure and filter material.