Fluidized bed boiler denitration device
A fluidized bed boiler and denitrification technology, applied in chemical instruments and methods, gas treatment, dispersed particle separation, etc., can solve the problems of denitrification effect limitation, influence of denitrification agent entry, denitrification effect influence, etc.
Inactive Publication Date: 2016-08-24
NANTONG GOD OF HORSES THREAD
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Problems solved by technology
[0002] The denitrification of the current fluidized bed boiler generally adopts spray guns arranged in the flue at the entrance of the cyclone separator, and uses the spray gun to spray the denitrification agent into the flue to react with nitrogen oxides in the flue gas to generate nitrogen and water. Using water agent, spray the denitrification agent directly into the flue with a spray gun. Due to the effective dispersion effect of the nozzle, the sprayed denitrification agent can only be distributed at the outlet of the spray gun, and the denitrification effect is affected.
In addition, due to the high temperature in the flue, in order to prevent the spray gun from being burned out at high temperature, the outlet of the spray gun is generally set in the furnace wall of the boiler, which further affects the denitrification agent entering the inside of the flue, and the denitrification effect is limited
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[0015] refer to figure 1 and figure 2 , a denitrification device for a fluidized bed boiler, which includes a denitrification agent storage tank 6, a denitrification pump 7, a spray gun 3, and a compressed air device 5; Externally, the gun body is tubular, and one end of the gun body 34 is equipped with a nozzle 31, and the pipe wall of the gun body 34 is provided with a gas pipe 35 and a denitrification pipe 36, and an air cooling pipe 33 is installed on the cooling pipe 32, and the air pipe 35 passes through the pipeline 8 Connected to the compressed air device 5, the air-cooled pipe is also connected to the compressed air device through a pipeline, the outlet of the denitration agent storage tank 6 is connected to the inlet of the denitration pump 7, and the outlet of the denitration pump 7 is connected to the denitration pipe 36 through a pipeline 9; the spray gun 3 is installed on the side wall 10 of the intake flue 4 of the cyclone separator 2 of the fluidized bed boil...
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The invention discloses a fluidized bed boiler denitration device which comprises a denitration agent storage tank, a denitration pump, a spray gun and an air compressing device. The spray gun comprises a gun body and a cooling pipe sleeving outside the gun body, a nozzle is mounted at one end of the gun body, an air pipe and a denitration pipe are arranged on the wall of the gun body, an air cooling pipe is mounted on the cooling pipe, both the air pipe and the air cooling pipe are connected onto the air compressing device, the denitration agent storage tank is connected to the denitration pipe through the denitration pump, the spray gun is mounted on the side wall of an air incoming flue of a cyclone separator of a fluidized bed boiler, the nozzle faces the inside of the air incoming flue and exceeds the inner wall of the same, and a flow control valve is arranged on the air pipe. Compressed air is utilized to enable the nozzle of the spray gun to maintain certain temperature, the nozzle is enabled to exceed the inner wall of the air incoming flue, and a denitration agent sprayed by the nozzle can have large diffusion area to fully contact and react with NOx in smoke.
Description
technical field [0001] The invention relates to a denitration device for a fluidized bed boiler. Background technique [0002] The denitrification of the current fluidized bed boiler generally adopts spray guns arranged in the flue at the entrance of the cyclone separator, and uses the spray gun to spray the denitrification agent into the flue to react with nitrogen oxides in the flue gas to generate nitrogen and water. Using water agent, the denitrification agent is directly sprayed into the flue with a spray gun. Due to the effective dispersion effect of the nozzle, the sprayed denitrification agent can only be distributed at the outlet of the spray gun, and the denitrification effect is affected. In addition, due to the high temperature in the flue, in order to prevent the spray gun from being burned out at high temperature, the outlet of the spray gun is generally set in the furnace wall of the boiler, which further affects the denitrification agent entering the inside o...
Claims
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IPC IPC(8): B01D53/34B01D53/56
CPCB01D53/34B01D53/56B01D2258/0283
Inventor 马志宏
Owner NANTONG GOD OF HORSES THREAD