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An ammonia injection grid anti-blocking device for scr denitrification system

An ammonia injection grid and denitrification technology, applied in the field of flue gas denitrification, to achieve the effect of solving nozzle blockage and effective and stable operation

Active Publication Date: 2017-09-01
OLD AGE EXPERT DESIGN INST OF XIAN XIBEI ELECTRIC POWER DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides an ammonia injection grid anti-blocking device for SCR denitrification system, which can effectively solve the problem of nozzle blockage and ensure the effective and stable operation of the system

Method used

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  • An ammonia injection grid anti-blocking device for scr denitrification system
  • An ammonia injection grid anti-blocking device for scr denitrification system
  • An ammonia injection grid anti-blocking device for scr denitrification system

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Embodiment Construction

[0013] See figure 1 , an ammonia injection grid anti-blocking device for an SCR denitrification system, which includes a denitrification reactor inlet flue 1, an SCR denitrification reactor 2 connected to the denitrification reactor inlet flue 1, and a denitrification reactor inlet flue 1 is set Ammonia injection grid 3 is arranged horizontally. Ammonia storage tank 4 is connected to ammonia injection grid 3 through ammonia evaporator 5 and mixer 6 in sequence. Ammonia dilution fan 7 is connected to mixer 6 through heater 8.

[0014] The heater 8 is arranged in the inlet flue 1 of the denitrification reactor, and the heater 8 is arranged at the front end of the ammonia injection grid 3, and the flue gas flow passes through the heater 8 and the ammonia injection grid 3 sequentially in the inlet flue 1 of the denitrification reactor, The high-temperature flue gas provides a heat source for the heater, which effectively saves energy consumption.

[0015] See figure 2 , image...

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Abstract

The invention provides an ammonia injection grid anti-blocking device for an SCR denitrification system. The device can effectively solve the problem of nozzle blockage and ensure the effective and stable operation of the system. The inlet flue of the denitrification reactor is described. An ammonia injection grid is arranged in the inlet flue of the denitrification reactor, and the ammonia storage tank is connected to the ammonia injection grid through an ammonia evaporator and a mixer in sequence. It is characterized in that: the ammonia dilution fan passes through A heater is connected to the mixer.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to an ammonia injection grid anti-blocking device for an SCR denitrification system. Background technique [0002] Selective catalytic reduction (SCR) denitrification technology has the advantages of high efficiency, good selectivity, stable and reliable operation, etc., and has been widely used in China. The principle of SCR flue gas denitrification is that under the action of a catalyst, ammonia-containing air is injected into the flue gas to reduce NOx to nitrogen and water, effectively avoiding secondary pollution to the environment. [0003] Because the combustible sulfur in the boiler fuel coal is easily oxidized to SO during the combustion process 2 , of which about 0.5%~2% of SO 2 further oxidized to SO 3 , water vapor and SO in the flue gas 3 Under certain conditions, it will react with ammonia to form ammonium bisulfate, and its initial formation tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/90B01D53/56
Inventor 俞元元孙志翱金良林育平尤毓敏
Owner OLD AGE EXPERT DESIGN INST OF XIAN XIBEI ELECTRIC POWER DESIGN INST