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Method for controlling adaptability of sulfur dioxide discharge amount of desulfurization system in power plant

A sulfur dioxide and desulfurization system technology, which is applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve problems such as mismatching removal rates, achieve the effects of improving absorption effects, improving economic performance, and improving utilization effects

Active Publication Date: 2019-07-05
哈尔滨沃华智能电力技术有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the invention is to solve the problem of slurry pH and SO in existing desulfurization devices. 2 The problem of mismatching removal rate provides an adaptive control method for sulfur dioxide emission in desulfurization system of power plant

Method used

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  • Method for controlling adaptability of sulfur dioxide discharge amount of desulfurization system in power plant
  • Method for controlling adaptability of sulfur dioxide discharge amount of desulfurization system in power plant
  • Method for controlling adaptability of sulfur dioxide discharge amount of desulfurization system in power plant

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specific Embodiment approach 1

[0031] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the method for adaptive control of sulfur dioxide emissions from the desulfurization system of the power plant described in this embodiment is characterized in that the discharge of sulfur dioxide at the outlet of the absorption tower of the desulfurization system is monitored in real time, and the pH setting is adjusted according to the monitored value of sulfur dioxide monitored in real time Adjust the pH control value in real time according to the pH setting value, and output the pH control value to the pH controller of the absorption tower, so as to realize the adaptive control of the sulfur dioxide emission according to the pH setting value.

specific Embodiment approach 2

[0032] Specific implementation mode two: the following combination figure 1 Describe this embodiment, this embodiment will further explain Embodiment 1, adjust the pH setting value according to the sulfur dioxide monitoring value of real-time monitoring, the specific process of adjusting the pH control value in real time according to the pH setting value is:

[0033] S1, the sulfur dioxide monitoring value at the outlet of the absorption tower with SO2 set point Do the difference, the difference is passed through f 1 (x) The function module obtains the intermediate variable B:

[0034]

[0035] S2, the pH monitoring value pv at the outlet of the absorption tower pH Make a difference with the intermediate variable B obtained by S1 to obtain the intermediate variable C:

[0036] C=pv pH -B;

[0037] S3 and S2 obtain the intermediate variable C as the input data of the first channel of the switch, and the output data D of the switch as the input data of the second chan...

specific Embodiment approach 3

[0044] Specific implementation mode three: the following combination figure 1 Describe this implementation mode, this implementation mode will further explain the implementation mode 2, the f in S1 1 (x) function f of the function module 1 (x) is obtained by:

[0045] Under the rated working condition of the unit, when the pH is changed, the monitoring value of sulfur dioxide will change, and the change value of pH is y 1 、y 2 、y3 、y 4 、y 5 , and the change values ​​corresponding to the monitoring values ​​of sulfur dioxide are x 1 、x 2 、x 3 、x 4 、x 5 ,but:

[0046] f 1 (x)=(x 1 ,x 2 ,x 3 ,x 4 ,x 5 )→(y 1 ,y 2 ,y 3 ,y 4 ,y 5 ).

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Abstract

The invention provides a method for controlling the adaptability of the sulfur dioxide discharge amount of a desulfurization system in a power plant, and belongs to the technical field of power generation. In order to solve the problem that in an existing desulfurization device, the pH of slurry is not matched with the SO2 removal rate, the method for controlling the adaptability of the sulfur dioxide discharge amount of the desulfurization system in the power plant comprises the steps that the discharging amount of sulfur dioxide at an outlet of an absorption tower of the desulfurization system is monitored in real time; according to the sulfur dioxide monitored value which is monitored in real time, a pH set value is adjusted; according to the pH set value, the pH control value is adjusted in real time, the pH control value is output to a pH controller of the absorption tower, and control over the adaptability of the sulfur dioxide discharge amount is achieved according to the pH setvalue. The method is used for controlling the sulfur dioxide discharge amount of the desulfurization system.

Description

technical field [0001] The invention relates to an adaptive control method for sulfur dioxide emission in a desulfurization system of a power plant, belonging to the technical field of power generation. Background technique [0002] Sulfur dioxide (SO 2 ) into the atmosphere will produce acid rain and damage the environment. In recent years, with the improvement of people's awareness of environmental protection, SO 2 Emissions have gradually become an important control indicator for my country's industrial waste gas pollution emissions. As a large primary energy consumer, thermal power plants are SO 2 main source of emissions, in order to reduce SO 2 Emissions, the power plant continuously strengthens the unit SO 2 The emission reduction efforts are achieved by installing flue gas desulfurization devices. [0003] At present, the unit flue gas desulfurization technology is becoming more and more mature. Among them, the desulfurization efficiency of the widely used wet ...

Claims

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Application Information

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IPC IPC(8): B01D53/30B01D53/50B01D53/80
CPCB01D53/30B01D53/346B01D53/501B01D53/80B01D2251/404B01D2251/606B01D2258/0283
Inventor 于海东姚坤付俊丰孙建国李越男孙殿承张磊关志成纪成龙李建鹏赵龙伟刘东旭马志国曹勇
Owner 哈尔滨沃华智能电力技术有限公司
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