Ammonia spray control method and device based on denitrification system

A control method and denitrification technology, which is applied in the field of ammonia injection control based on denitrification system, can solve the problems of low control efficiency and lag of control parameters, so as to solve the lag of control parameters, reduce intervention and workload, and increase the automatic input rate of ammonia injection and quality effects

Active Publication Date: 2021-09-21
CHNA ENERGY INVESTMENT CORP LTD +2
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Problems solved by technology

[0005] The embodiment of the present invention provides an ammonia injection control method and device based on a denitrification system, to at least solve the technical problem of low control efficiency caused by the hysteresis of the control parameters used in the ammonia injection control of the SCR system in the prior art

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  • Ammonia spray control method and device based on denitrification system
  • Ammonia spray control method and device based on denitrification system
  • Ammonia spray control method and device based on denitrification system

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Embodiment 2

[0063] According to an embodiment of the present invention, an ammonia injection control device based on a denitrification system is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and , although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0064] Figure 4 It is a schematic diagram of an ammonia injection control device based on a denitrification system according to Embodiment 2 of the present invention, combined with Figure 4 As shown, the device includes:

[0065] The first acquisition module 40 is configured to acquire the feedforward signal of the denitration system according to the historical parameters of the denitrification system, wherein the historical parameters include: unit load, flue gas flow rate and inlet n...

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Abstract

The invention discloses an ammonia injection control method and device based on a denitrification system. Wherein, the method includes: obtaining the feedforward signal of the denitrification system according to the historical parameters of the denitrification system, wherein the historical parameters include: unit load, flue gas flow rate and inlet nitrogen compound concentration; inputting the feedforward signal and the first ammonia injection control parameters Go to the preset ammonia injection control model to obtain the second ammonia injection control parameter; control the denitrification system to inject ammonia according to the second ammonia injection control parameter. The invention solves the technical problem of low control efficiency caused by hysteresis of the control parameters used in the ammonia injection control of the SCR system in the prior art.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to an ammonia injection control method and device based on a denitrification system. Background technique [0002] According to the data provided by the China Environmental Monitoring Center, among the total nitrogen oxide emissions in my country, the nitrogen oxide emissions from the power industry account for a relatively large proportion. At present, the most mature technology for controlling nitrogen oxides is selective catalytic reduction (SCR ) technology, SCR (Selective Catalytic Reduction) has no by-products, no secondary pollution, simple system results and high denitrification efficiency. The SCR system means that under the action of a catalyst and the presence of oxygen, NH3 preferentially reacts with NOX to produce nitrogen and water. [0003] In the existing technology, the SCR denitrification system adopts a single-loop closed-loop control method for denitrification co...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/56B01D53/86
CPCB01D53/56B01D53/8628B01D2251/2062B01D2258/0283
Inventor 周忠伟王天堃朱洪伟王利涛李海阳周尚峰陈承超张来青刘月正郇政山李书元麻红宝
Owner CHNA ENERGY INVESTMENT CORP LTD
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