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Ph value control method limestone slurry in desulfurization system

A technology of limestone slurry and pH value, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems that cannot be fully automated, and achieve the effect of avoiding inaccuracy and improving accuracy

Inactive Publication Date: 2012-10-24
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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  • Abstract
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  • Claims
  • Application Information

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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 method for controlling the pH value of limestone slurry in a desulfurization system to solve the problem that the pH value control process cannot be fully automated

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  • Ph value control method limestone slurry in desulfurization system
  • Ph value control method limestone slurry in desulfurization system
  • Ph value control method limestone slurry in desulfurization system

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Embodiment Construction

[0030] 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.

[0031] 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 control method of limestone slurry in a desulfurization system. The method includes acquiring supply slurry flow theory value according to mass flow of SO2 entering an absorption tower, determining pH primary value that the mass flow of the SO2 entering the absorption tower corresponds to according to function relation between the mass flow of the SO2 and the pH primary value, comparing the pH primary value and measured current pH value of limestone slurry to obtain supply slurry flow modification value, modifying the supply slurry flow theory value according to the supply slurry flow medication value and controlling actual supply slurry flow of limestone slurry according to modified supply slurry flow value. The function relation is formed by matching mapping data between the mass flow of the SO2 entering the absorption tower and the actual pH value of the limestone slurry in the absorption tower in advance under the condition that the preset desulfurization efficiency requirements are met. The pH value control method 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 method for controlling the pH value 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...

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Application Information

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IPC IPC(8): B01D53/80B01D53/50
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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