Double-atomization spray gun for SNCR (selective non-catalytic reduction) denitration system

A technology of atomizing spray gun and atomizing nozzle, which is applied in the direction of injection device, injection device, liquid injection device, etc., can solve the problems of high control system requirements, small contact area, low denitrification efficiency, etc., and achieve low ammonia escape rate and denitrification High efficiency, easy to mix evenly

Inactive Publication Date: 2014-03-26
杨建华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the boiler load changes or NO x Concentration changes, the amount of compressed air or the amount of reducing agent solution needs to be changed, but the interaction between the two is relatively large, it is very difficult to adjust, and the requirements for the control system are relatively high.
In addition, the existing spray gun still has the defects of small contact area between conical spray and flue gas, which makes it difficult to mix evenly, low denitrification efficiency, and high ammonia escape rate.

Method used

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  • Double-atomization spray gun for SNCR (selective non-catalytic reduction) denitration system
  • Double-atomization spray gun for SNCR (selective non-catalytic reduction) denitration system

Examples

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Embodiment

[0015] Example: figure 2 It is a circulating fluidized bed SNCR denitrification system. The double atomization spray guns (9) of the present invention are installed at the inlet of the cyclone separator (8) of the circulating fluidized bed boiler, and the number of the specific installation spray guns is determined according to the size of the boiler. The denitrification system includes a dissolution tank (3), a liquid storage tank (13), a metering delivery pump (6) and a double atomization spray gun (9), wherein: the dissolution tank (3) is equipped with an agitator (1) and a heating device (4), and, the upper end of dissolving tank (3) is provided with urea granule inlet (2) and desalinated water pipeline inlet, and this inlet is connected with desalted water pipeline (12), and the outlet of dissolving tank (3) passes through pipeline and control The valve is connected to the input port of the liquid storage tank (13), the output port of the liquid storage tank (13) is conn...

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Abstract

The invention discloses a double-atomization spray gun for an SNCR (selective non-catalytic reduction) denitration system. The double-atomization spray gun comprises a reducer solution pipeline, a mechanical conical spraying nozzle, a compressed air sleeve, a fan-shaped air atomization nozzle, a protection sleeve and quick-connecting flanges, wherein the spray gun adopts a method of combining direct reducer solution atomization and secondary compressed air atomization, so that the atomization effect is relatively good; a compressed air flow and a reducer flow are independently adjustable and low in correlation, so that the control is relatively convenient and simple. The spray gun disclosed by the invention is connected with the sleeves by the quick-connecting flanges, the nozzle is connected with the spray gun by a thread, so that the connection and the replacement are convenient. The double-atomization spray gun is convenient to manufacture, low in cost, wide in application range, easy to popularize and implement, and good in economic benefits.

Description

Technical field: [0001] The invention relates to a reducing agent injection spray gun for a flue gas SNCR denitrification system, in particular to a reducing agent injection spray gun used in a circulating fluidized bed SNCR denitrification system using ammonia water or urea as a reducing agent. Background technique: [0002] With the implementation of the national standard "Emission Standard of Air Pollutants for Thermal Power Plants" (GB13223-2011), the NO x Neither can meet the requirements of the new standard, and a suitable flue gas denitrification device must be selected for denitrification treatment. The SNCR denitrification system is favored by everyone because of its simple equipment, compact structure and low cost. In the SNCR denitrification system, the reductant spray gun is one of the core and most critical components of the system, and its spray atomization effect is directly related to the denitrification efficiency of the system and the ammonia escape rate. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/56B05B1/04B05B9/03
Inventor 杨建华周建强杨海瑞秦光耀屈卫东杨小琨杨宏民
Owner 杨建华
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