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Ammonia spraying control method and device of SCR system

A technology of SCR system and control method, which is applied in the direction of muffler device, exhaust device, electronic control of exhaust gas treatment device, etc. Inaccurate, Qualifying Effects

Active Publication Date: 2019-01-18
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an ammonia injection control method and device for an SCR system, to at least solve the technical problem of inaccurate control of the injection volume of the SCR system in the prior art

Method used

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  • Ammonia spraying control method and device of SCR system
  • Ammonia spraying control method and device of SCR system
  • Ammonia spraying control method and device of SCR system

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Embodiment 1

[0025] According to an embodiment of the present invention, an embodiment of an ammonia injection control method for an SCR 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.

[0026] figure 1 It is a flow chart of the ammonia injection control method of the SCR system according to the embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0027] Step S102, detecting the nitrogen oxide content of the flue gas at the outlet of the SCR system to obtain the measured nitrogen oxide content.

[0028] Specifically, the outlet flue gas of the above-mentioned SCR system (selective catalytic reduction system) is the ...

Embodiment 2

[0052] According to an embodiment of the present invention, an embodiment of an ammonia injection control device for an SCR 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.

[0053] Figure 5 is a schematic diagram of the ammonia injection control device of the SCR system according to an embodiment of the present invention, such as Figure 5 As shown, the device includes:

[0054] The detection module 50 is configured to detect the nitrogen oxide content of the flue gas at the outlet of the SCR system to obtain the measured nitrogen oxide content.

[0055] The determining module 52 is configured to determine a proportional coefficient according to the diffe...

Embodiment 3

[0059] According to an embodiment of the present invention, a storage medium is provided, and the storage medium includes a stored program, wherein, when the program is running, the device where the storage medium is located is controlled to perform the following steps: detecting the nitrogen oxide content of the flue gas at the outlet of the SCR system , to obtain the measured nitrogen oxide content; according to the difference between the measured nitrogen oxide content and the preset initial target nitrogen oxide content, a proportional coefficient is determined, wherein the proportional coefficient is used to adjust the ammonia injection of the SCR system flow rate; adjusting the ammonia injection flow rate of the SCR system according to the proportional coefficient.

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Abstract

The invention discloses an ammonia spraying control method and device of an SCR system. The method comprises the steps that the nitrogen oxide content of flue gas at an outlet of the SCR system is detected, and the actually measured nitrogen oxide content is obtained; according to the difference between the actually measured nitrogen oxide content and preset initial target nitrogen oxide content,a proportion coefficient is determined, wherein the proportion coefficient is used for adjusting the ammonia spraying flow of the SCR system; the ammonia spraying flow of the SCR system is adjusted according to the proportion coefficient. The method and device solve the technical problem that control over the ammonia spraying amount of the SCR system in the prior art is not accurate.

Description

technical field [0001] The invention relates to the field of denitrification control, in particular to an ammonia injection control method and device for an SCR system. Background technique [0002] In the prior art, the denitration control system of the power plant usually uses the method of fixing the molar ratio of ammonia nitrogen to automatically control the ammonia injection, but the activity of the catalyst disturbs the control method greatly, and the flue gas flow rate at the SCR inlet is uneven due to the flow field distribution. Large fluctuations will interfere with automatic control, so the control effect is not good, and excessive ammonia injection often occurs. [0003] Aiming at the problem of inaccurate injection volume control of the SCR system in the prior art, no effective solution has been proposed yet. Contents of the invention [0004] Embodiments of the present invention provide an ammonia injection control method and device for an SCR system, so as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N9/00
CPCF01N3/2066F01N3/208F01N2570/14F01N2610/02F01N2900/0411Y02T10/12Y02T10/40
Inventor 岳妮
Owner CHNA ENERGY INVESTMENT CORP LTD
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