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Nonuniform spraying device and method for SCR cold-state mode experiment

A cold-state modeling test and non-uniformity technology, which is applied in the direction of injection devices, liquid injection devices, chemical instruments and methods, etc., to achieve the effect of improving accuracy and reliability

Active Publication Date: 2017-09-12
DATANG ENVIRONMENT IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some researchers have found through on-site measurements and other means that the NO at the entrance of the SCR system x Concentrations are not uniformly distributed, therefore, there are certain limitations to using the above research strategy

Method used

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  • Nonuniform spraying device and method for SCR cold-state mode experiment
  • Nonuniform spraying device and method for SCR cold-state mode experiment
  • Nonuniform spraying device and method for SCR cold-state mode experiment

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing of description and specific embodiment:

[0030] For the SCR system of a 660MW coal-fired unit, this embodiment provides a non-uniform injection device for SCR cold-state modeling test, which is set in a flue, such as figure 1 As shown, it is installed in the horizontal flue at the inlet of the SCR system. Its section size is 5200mm×8400mm. A total of 4 temporary measuring holes are reserved in the upper part of the horizontal flue at the entrance of the SCR system. NO for SCR cold modeling test x The installation position of the injection device for concentration non-uniformity is consistent with the position of the temporary measuring hole at the entrance of the SCR system. road.

[0031] Such as figure 2 As shown, the device includes: multiple groups of injection subunits with the same structure; one of the injection subunits is framed by the dotted box in the figure....

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Abstract

The invention provides a nonuniform spraying device for a SCR cold-state mode experiment. The nonuniform spraying device is arranged in a flue gas and comprises multiple spraying subunits of a same structure, and each spraying subunit comprises a NOx / tracer gas diluting air inlet pipe, a support pipe communicated with the NOx / tracer gas diluting air inlet pipe, multiple nozzles arranged on the support pipe and a static mixing pipe arranged at a spout of each nozzle. The device can realize nonuniform spraying of NOx / tracer gas in the SCR cold-state mode experiment, so that experiment parameters are ensured to better meet actual running conditions, and accuracy and reliability of the cold mode experiment are improved. The invention further provides a spraying method based on the device.

Description

technical field [0001] The invention relates to a non-uniform spraying device and method for SCR cold-state modeling test, in particular to a device that can realize NO x / SCR cold modeling test device and method for non-uniform injection of tracer gas. Background technique [0002] During the 13th Five-Year Plan period, the denitrification and ultra-low emission transformation of coal-fired power stations has become a key NO x One of the important technical measures for gas emission reduction. In my country, the mainstream process of denitrification technology in power stations is Selective Catalytic Reduction (Selective Catalytic Reduction, SCR). Selective Catalytic Reduction refers to the use of reducing agents (such as NH 3 , liquid ammonia, urea) to "selectively" interact with NO in the flue gas x React and generate non-toxic and non-polluting N 2 and H 2 O. [0003] SCR denitrification technology has a very significant effect on boiler flue gas NOx control, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/56B05B7/04B05B13/02
CPCB01D53/56B01D53/90B05B7/0416B05B13/0278B01D2258/0283
Inventor 赵宇明沈德魁刘国富李春雨陶君李穹马务
Owner DATANG ENVIRONMENT IND GRP
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