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SO2 concentration time mean value control method and system

A control method and timing controller technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as not ideal, absorption tower blind areas, etc., to reduce power consumption, reduce operating burden, and prolong life. Effect

Pending Publication Date: 2021-03-19
HUANENG INT POWER CO LTD YUHUAN POWER PLANT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PH value control quality of the current control loop is not very ideal. The operation and maintenance personnel often withdraw to manual intervention by directly adjusting the limestone slurry flow control valve, which can easily cause the occurrence of blind spots in the absorption tower.

Method used

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  • SO2 concentration time mean value control method and system
  • SO2 concentration time mean value control method and system

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Embodiment Construction

[0026] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 As shown, the SO2 concentration time-average control method provided by the embodiments of the present invention includes the following steps:

[0028] S101, calculate in real time the SO emitted by the boiler during the time period from the current moment to the previous hour of the current moment 2 Concentration mean S1.

[0029] As a specific embodiment of the present invention, the current time is 15:20:00, and the SO2 discharged from the boiler during the 20-minute period from 15:00:00 to 15:20:00 is calculated. 2 The average value of concentration, the collection frequency of SO2 concentration is 1 time per second.

[0030] S102, according to SO 2 Concentration average value S1, real-time calculation of the average SO2 concentration value S2 allowed to be discharged from the boiler during the time period ...

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Abstract

The invention discloses a SO2 concentration time mean value control method, and relates to the field of desulfurization control. The metohd comprises the following steps of: calculating a SO2 concentration mean value S1 discharged by a boiler in a time period from the current moment to the previous integral point moment of the current moment in real time; the average value S2 of the SO2 concentration allowed to be discharged by the boiler in the time period from the current moment to the next integral point moment of the current moment is calculated in real time, so that the operation burden of operation and maintenance personnel is reduced, the automatic control quality of the SO2 concentration and the stability of the system are improved, and the power consumption of desulfurization equipment is reduced. In addition, the embodiment of the invention further provides a SO2 concentration time mean value control system.

Description

technical field [0001] The invention relates to the field of desulfurization control, in particular to a method and system for controlling the time-average value of SO2 concentration. Background technique [0002] At present, the strategic design of most desulfurization control systems in China is to control the real-time concentration of SO2 by manually setting the pH value by the operation and maintenance personnel. In this way, only the control of the pH value is realized, and the control of the SO2 concentration is still in an open-loop adjustment state. In the actual operation process, boiler load and flue gas volume, sulfur content in coal quality, flue gas temperature, smoke concentration, absorbent quality, etc. are constantly changing, which brings a great operational burden to operators. [0003] The flue gas reaction of the desulfurization absorption tower with one million units is a typical chemical process with a large lag and slow dynamics, which brings great c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/30B01D53/50B01D53/80
CPCB01D53/30B01D53/346B01D53/50B01D53/80
Inventor 李来春邵海波毛国明韦存忠高峰刘聪翁浩斌
Owner HUANENG INT POWER CO LTD YUHUAN POWER PLANT