pH value controller of limestone slurry of desulfurization system

A limestone slurry and controller technology, which is applied in various fluid ratio control, ratio control, chemical variable control, etc., can solve the problem that the pH value control loop cannot be fully automated, so as to avoid inaccuracy and improve accuracy Effect

Inactive Publication Date: 2012-10-24
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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Problems solved by technology

[0005] In view of the problems existing in the prior art, the embodiment of the present application provides a limestone slurry pH value controller for a desulfurization system to solve the problem that the pH value control loop cannot be fully automated

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  • pH value controller of limestone slurry of desulfurization system
  • pH value controller of limestone slurry of desulfurization system
  • pH value controller of limestone slurry of desulfurization system

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0021] In order to make the above purpose, features and advantages of this application more obvious and easy to understand, the principle of the limestone-gypsum wet desulfurization system will be briefly introduced below, and then the application will be further described in detail with reference to the drawings and specific implementatio...

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Abstract

An embodiment of the invention discloses a pH value controller of limestone slurry of a desulfurization system. The controller comprises a first measuring module connected with a first microprocessor and a second microprocessor and used for measuring mass flow of SO2 entering an absorption tower and a second measuring module connected with the second microprocessor and used for measuring the pH value of the limestone slurry in the absorption tower. The first microprocessor is connected with a third microprocessor and used for determining supply slurry flow theory value, the second microprocessor is connected with a subtracter and used for determining pH primary value, and the subtracter is connected with the third microprocessor and used for conducting subtraction on the pH primary value and the pH value of the limestone slurry to obtain supply slurry flow modification value. The third microprocessor is used for controlling actual supply slurry flow of the limestone slurry according to results of supply slurry flow theory value modified through the supply slurry flow modification value. The pH value controller achieves complete automation of pH value control.

Description

technical field [0001] The present application relates to the technical field of desulfurization flue gas purification, in particular to a pH value controller of limestone slurry in a desulfurization system. Background technique [0002] SO 2 Gas is a kind of pollutant. In order to avoid polluting the environment, the possible emissions include SO 2 The industrial process of gas (for example, the industrial power generation process of coal-fired thermal power plant), usually requires desulfurization operation. see figure 1 , which shows a common limestone-gypsum wet desulfurization absorption tower system. The desulfurization process based on this absorption tower system is: the undesulfurized flue gas is inhaled by the air inlet 11 at the lower part of the absorption tower 10, and the sucked flue gas is in countercurrent contact with the limestone slurry 15 supplied to the absorption tower to generate hemihydrate plaster ( CaSO 3 1 / 2H 2 O), the plaster of paris chemic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50G05D21/02
Inventor 陈彪金东春钱洲亥乐园园曹志勇李治国王万林崔亚斌周晓云毛文利卢毓东
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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