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White smoke prevention intelligent detection method for wet desulphurization chimney

A detection method and wet desulfurization technology, which is applied in the field of automatic control of ultra-low emissions of coal-fired thermal power generating units, can solve the problems of high temperature waste of heat energy, blind recovery of heat energy, and no basis, so as to save coal consumption, be easy to implement, and accommodate easy to achieve effect

Active Publication Date: 2019-08-27
ZHEJIANG ZHENENG ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such recovery of heat energy is often blind, and there is no basis for the control of chimney smoke temperature. It is easy to waste heat energy when the temperature is too high or white smoke occurs when the temperature is too low.

Method used

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  • White smoke prevention intelligent detection method for wet desulphurization chimney
  • White smoke prevention intelligent detection method for wet desulphurization chimney
  • White smoke prevention intelligent detection method for wet desulphurization chimney

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Effect test

Embodiment 1

[0062] An intelligent detection method for white smoke prevention in wet desulfurization chimneys. This method determines the relationship between atmospheric temperature, atmospheric relative humidity, atmospheric wind force, wind direction and critical smoke temperature of chimney white smoke through experiments and statistical data analysis, so as to find the correlation formula, and import the formula into the control system; use the atmospheric temperature, atmospheric relative humidity, atmospheric wind force and wind direction signal as variables, introduce the correlation formula and automatically calculate the current "chimney white smoke critical smoke temperature" in real time; set the "chimney white smoke "Critical smoke temperature" is assigned to the chimney smoke temperature target set value, so as to automatically adjust the recovery capacity of the waste heat recovery system according to the critical smoke temperature of the chimney white smoke; the specific ste...

Embodiment 2

[0095] like figure 1 As shown, the first equipment 1 is added on the basis of the original design: that is, the water-to-water heat exchanger for the recovery of the waste heat of the flue gas of the tubular GGH flue gas, its pipeline and No. 6 regulating valve f6; the second equipment 2 is added on the basis of the original design : That is, the No. 4 regulating valve f4 (electric regulating valve) of the heat medium water inlet bypass of the tubular GGH flue gas heater; on the basis of the original design, a third device 3 is added: that is, the atmospheric temperature measuring point t around the chimney , Atmospheric relative humidity measuring point RH, atmospheric wind speed measuring point WS, atmospheric wind direction measuring point

[0096] "Increase the first equipment 1 on the basis of the original design" mentioned in the present invention means that a tubular GGH water-to-water heat exchanger is connected in parallel or in series on the original tubular GGH he...

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Abstract

The invention discloses a white smoke prevention intelligent detection method for a wet desulphurization chimney. The method comprises the following specific steps: S1, by adding a detection instrument, collecting four signals of atmospheric temperature, atmospheric relative humidity, atmospheric wind power and wind direction in real time, and transmitting the signals to a control system; S2, taking the four signals of atmospheric temperature, atmospheric relative humidity, atmospheric wind power and wind direction as four variables to be introduced into a computational formula of actual chimney white smoke critical smoke temperature in the control system, and calculating to obtain actual chimney white smoke critical smoke temperature; S3, feeding back the calculated and obtained actual chimney white smoke critical smoke temperature to a waste heat recovery system by the control system, and regulating the smoke temperature inside the chimney according to the actual chimney white smokecritical smoke temperature to realize waste heat recovery maximization and thermal pollution minimization. The method disclosed by the invention is easy to realize, thermal energy can be recycled greatly, the coal consumption is saved, and the ultra-low emission operating economy, reliability and environmental protection of a coal-fired unit can be improved obviously.

Description

technical field [0001] The invention relates to the technical field of ultra-low emission automatic control of coal-fired thermal power generating units, in particular to an intelligent detection method for preventing white smoke in wet desulfurization chimneys. Background technique [0002] With the ultra-low emissions of coal-fired units and the need to eliminate white smoke in key areas, most domestic coal-fired units have undergone ultra-low emission transformation, and many coal-fired units have also added tubular GGH flue gas coolers and flue gas heaters to achieve At the same time of ultra-low emission, white smoke from the chimney is eliminated to reduce the environmental impact of gypsum rain on the surrounding area. However, at present, when many units are running, the flue temperature is too high, resulting in large heat loss, large amount of auxiliary heating steam, large flue gas volume flow rate, high flow rate, high resistance, high power consumption of fans, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02F23J15/02F23J15/06
CPCF23J15/02F23J15/06G01D21/02Y02E20/30
Inventor 金军钱晓峰赵朝阳朱海明徐伟施鹏飞周建伟
Owner ZHEJIANG ZHENENG ELECTRIC POWER
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