The working principle of the FGM boiler series pulse jet bag filter

FGM boiler series pulse jet bag filter by the box body assembly, the filter bag assembly, guiding device, pulse injection system, the grey system, control system, the offline protection system, etc.

1, the box body parts: the case on the ( Net wind chamber) , in the box ( Filter chamber) Frame (under, Ash hopper) , flue gas distributor, flower board, platforms, escalators, supporting feet, the air inlet, ash, heat preservation, color palette, etc.

2, the filter bag assembly: the framework of filter bag, bag and hang bags connection design adopts the self-locking device, easy installation and replacement, and can effectively prolong the service life of filter bag. Filter bag specifications for: 130 x6000mm, 160 x6000mm, phi phi phi 160 x7000mm three, adopt PPS needled felt ( Imports of PPS/PPS504CSl7, waterproof and oil processing) 。

3, guiding device, adopts the most advanced way into the wind, the unique design of the flue gas distribution device, not only can effective distribution of dust, gas separation and for larger particles, avoid dust gas washout filter bag, further improve the efficiency of dust removal, improve the service life of filter bag.

4, pulse injection system: recoil header, electromagnetic pulse valve, pressure, nozzle pipe joint, support, etc. HGDM - 5. 6 the following specifications for the whole case ash, in the upper part of the rest of the specifications in each filter bag with a compressed air nozzle tube. Runtime, generally set each row of filter bag every 10 s pulse inverse blow soot cleaning time, time to start a solenoid valve, the pulse counter blowing compressed air into the bag filter for dust.

5, ash system: by electric vibrator ( Air cannons) , electric heater, grey level indicator, electric vibrator ( Air cannons) To ensure that the dust has good liquidity.

6, the control system: mainly by pulse injection control instrument, PLC computer control cabinet, thermal resistance thermometer, static pressure, material level indicator measuring point and measuring element.

7, offline protection system: mainly by bypass valve, pressure differential device, material level meter, thermometer, pressure test device, pulse control meter, filter bag leak detection device, etc. Flue gas temperature is too high or water when the boiler tail again processing, so as not to burn the filter bag. In the net gas chamber has composed of differential pressure gauge and other filter bag leak detection device, so that timely alarm when filter bag is damaged. Due to the large tonnage boiler ignition and fuel, low load need to spray will produce large amounts of oil gas, the gas directly into the dust, will cause the filter bag cloth layer harden and make the system resistance increases, affect the normal operation. System add bypass pipe, make instant injection oil gas through the bypass pipe emissions, effectively protect the filter bag.

working principle dust gas from the nozzle to each unit ash hopper, under the guidance of ash hopper diversion system directly into ash hopper after the big particles of dust separation, the rest of the dust with the air filter in the housing area, the filtered clean gas through the filter bag, the enclosure, lift valve, the exhaust duct discharge. As you progress through the filter, when the surface of the filter bag dust accumulation reaches a certain amount, close by soot control device according to the set of program lift valve, open the electromagnetic pulse valve injection, shake off the dust on the filter bag, fall into the hopper by the discharge valve discharge.

this series of filter is equipped with the bypass flue, when boiler ( Or incinerator) Started, open the bypass flue, pitches to prevent ignition oil burning is bad, oil viscosity on the filter bag, open flame would burn up filter bag. Accidents occurred when the boiler exhaust temperature exceeds filter bag allow temperature, open the bypass.

the series filter also has detection equipment, by multiple probe ( Each warehouse room 1) , at the same time, in the hopper is equipped with air cannons.