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Ammonia spraying grating intelligent optimization and adjustment system and method for SCR denitration device

An ammonia injection grid, intelligent optimization technology, applied in control/regulation systems, chemical instruments and methods, separation methods, etc., can solve the problem of inability to know the concentration distribution, unevenness, and inability to solve the problem of ammonia injection in the SCR denitrification system , to improve test efficiency and data validity, avoid under-adjustment or over-adjustment, and improve technicality and reliability

Active Publication Date: 2016-08-17
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this invention patent can only measure flue gas NO according to the fixed sampling point of CEMS system. x Concentration analysis, can not know the NO in the flue x The concentration distribution of the concentration cannot solve the problem of uneven ammonia injection in the SCR denitrification system

Method used

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  • Ammonia spraying grating intelligent optimization and adjustment system and method for SCR denitration device
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  • Ammonia spraying grating intelligent optimization and adjustment system and method for SCR denitration device

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Embodiment 1

[0101] The device and method of this embodiment are as described above, and will not be repeated. The optimization and adjustment test of ammonia injection under specific load conditions is carried out for a coal-fired power plant to ensure that the SCR outlet NO x The concentration distribution meets the uniformity requirement. Among them, the generator set is required to operate stably under a certain boiler load state, and the working conditions such as the output of the induced draft fan, the opening of the baffles at various places in the flue, the amount of coal supplied and the quality of the coal remain unchanged.

[0102] After entering the plant, the first step is to wait for the operating load and working conditions of the power plant to stabilize, and set the intelligent optimization and adjustment system of the ammonia injection grid of the SCR denitrification device in place. The flue gas flow distribution detection system, the flue gas distribution centralized s...

Embodiment 2

[0123] The device and method of this embodiment are as described above and will not be repeated. A coal-fired power plant implements an ammonia injection optimization adjustment test under multiple load conditions. It is required that after the ammonia injection optimization adjustment test, each ammonia injection branch pipe in the ammonia injection grid When the valves of the ammonia injection flow regulating valves 18 at 17 are kept stationary, the SCR outlet NO can still be guaranteed under the multi-load condition x The concentration distribution meets the uniformity requirement. Among them, it is required that during the optimization and adjustment test of ammonia injection, each load condition can run stably for more than one hour, and during the stable operation period, the output of the induced draft fan, the opening of the baffles around the flue, the amount of coal supplied and the quality of the coal should be maintained. The situation remains the same.

[0124] T...

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Abstract

The invention provides an ammonia spraying grating intelligent optimization and adjustment system and method for an SCR denitration device and belongs to the technical field of control over atmospheric pollutants discharged by coal-fired boilers. The ammonia spraying grating intelligent optimization and adjustment system for the SCR denitration device comprises a flue gas flow distribution detection system, a flue gas distribution concentrated sampling system I, a flue gas analyzer I, an ammonia spraying grating, a catalyst layer, a flue gas distribution concentrated sample system II, a flue gas analyzer II and an intelligent control system. The flue gas flow distribution detection system, the flue gas distribution concentrated sampling system I and the flue gas analyzer I are arranged in an SCR inlet flue, the ammonia spraying grating and the catalyst layer are arranged in an SCR reactor in sequence, and the flue gas distribution concentrated sample system II and the flue gas analyzer II are arranged in an SCR outlet flue. By means of the ammonia spraying grating intelligent optimization and adjustment system and method for the SCR denitration device, intelligent control over ammonia spraying optimization and adjustment, and wireless transmission for flue gas low detection and ammonia spraying flow detection are achieved, the ammonia spraying amount is controlled in the whole process, excessive ammonia spraying is effectively avoided, the testing efficiency and data effectiveness are improved, and the whole system is high in design integrity and portability.

Description

technical field [0001] The invention belongs to the technical field of controlling air pollutants discharged from coal-fired boilers, and relates to an intelligent optimization and adjustment system for an ammonia injection grid of an SCR denitrification device. Specifically, based on the centralized sampling device, the distributed flue gas sampling and analysis of the SCR inlet and outlet flue is realized, and the distribution and flow velocity distribution data of each component gas in the inlet and outlet flue are obtained, and then based on wireless communication technology, the data is real-time It is transmitted to the upper computer intelligent control system, and the ammonia injection flow rate of each branch pipe of the ammonia injection grid is determined after sorting and calculating the data, and based on this, the precise adjustment of the ammonia injection optimization process is realized. Background technique [0002] The power industry is the first basic ene...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/56G05D7/06
CPCB01D53/346B01D53/8625B01D53/90B01D2251/2062G05D7/0652
Inventor 郭阳董锐锋李媛
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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