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Smoke denitration ammonia injection amount control method and device

A control method and technology of a control device are applied in the field of control, which can solve the problems of inability to accurately control the amount of ammonia sprayed in flue gas denitrification, and achieve the effect of improving accuracy and precision.

Active Publication Date: 2012-09-05
BEIJING HUANENG XINRUI CONTROL TECH
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Problems solved by technology

[0012] The main purpose of the present invention is to provide a method and device for controlling the amount of ammonia injection for flue gas denitrification, so as to solve the problem in the prior art that the amount of ammonia injection required for flue gas denitrification cannot be accurately controlled

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  • Smoke denitration ammonia injection amount control method and device
  • Smoke denitration ammonia injection amount control method and device
  • Smoke denitration ammonia injection amount control method and device

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Embodiment Construction

[0032] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] The embodiment of the present invention provides an ammonia injection quantity control device for flue gas denitrification, figure 2 is a schematic diagram of an ammonia injection volume control device for flue gas denitrification according to an embodiment of the present invention, as figure 2 As shown, the control device of this embodiment includes a first acquisition unit 10 , a first calculation unit 20 , a second acquisition unit 30 , a second calculation unit 40 and a control unit 50 .

[0034] The first acquisition unit 10 is used to acquire the deviation value between the denitration efficiency of the flue gas denitrification system and the target denitration efficiency, and t...

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Abstract

The invention discloses a smoke denitration ammonia injection amount control method and device. The smoke denitration ammonia injection amount control method comprises the following steps of: obtaining an offset value of denitration efficiency; calculating a first ammonia injection coefficient corresponding to the offset value of the denitration efficiency; obtaining an offset value of an ammonia escape amount; calculating a second ammonia injection coefficient corresponding to the offset value of the ammonia escape amount; and regulating the ammonia injection amount according to the first ammonia injection coefficient and the second ammonia injection coefficient. Through the smoke denitration ammonia injection amount control method and device, disclosed by the invention, a problem of the ammonia injection amount required by smoke denitration can not be exactly controlled is solved, thus the accuracy of liquid ammonia amount required by the smoke denitration and an effect of the precision are reached, and an effect of diagnosing whether the activity and the operation parameter of a catalyst are reasonable or not is also realized at the same time.

Description

technical field [0001] The invention relates to the field of control, in particular to a method and device for controlling the amount of ammonia injection for flue gas denitrification. Background technique [0002] Flue gas denitrification is another key area for China to control pollutant emissions from industrial boilers after flue gas desulfurization in thermal power plants. technology). In the prior art, the method of controlling flue gas denitrification is to spray liquid ammonia into the reactor, and the control circuit SAMA diagram of this control method is as follows figure 1 As shown, among them, [0003] [0004] [0005] A: Set the denitrification efficiency (the general requirement is 70%); [0006] B: Output limit (the output limit of the adjustment loop composed of the set value and the measured value of the outlet flue gas NOx content is between 0.7 and 1.3, which is used as the correction value of the ammonia injection volume adjustment loop); [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D11/13B01D53/78B01D53/86B01D53/56
Inventor 冯彦杰余瑞峰
Owner BEIJING HUANENG XINRUI CONTROL TECH
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