Blind zone detection device applied to pH value control process of desulfurization system

Abstract

The embodiment of the invention discloses a blind zone detection device applied to a pH value control process of a desulfurization system. The device comprises a first measurer, a second measurer and a first microprocessor, wherein the first measurer is connected with a first memory; the second measurer is connected with a second memory; the first measurer is used for measuring a first pH value and first slurry supply flow at a first moment and storing in the first memory; the second measurer is used for measuring a second pH value and second slurry supply flow at a second moment and storing in the second memory; the first microprocessor is used for subtracting the second pH value and the second slurry supply flow from the first pH value and the first slurry supply flow and comparing the operation results with a second threshold value and a third threshold value respectively; and if the difference of the first pH value and the second pH value is greater than or equal to the second threshold value and the difference of the first slurry supply flow and the second slurry supply flow is less than or equal to the third threshold value, a judgment is made that a desulfurization blind zone occurs. According to the embodiment of the invention, automatic recognition of the desulfurization blind zone is realized.

Description

technical field [0001] The application relates to the technical field of desulfurization flue gas purification, in particular to a blind area detection device used in the pH value control process 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 / ...

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no effective and automatic device for detecting desulfurization blind spots in the desulfurization system, except for judging by human experience.

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