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Automatic adjusting and control method for pH of slurry of absorption tower

A control method and automatic adjustment technology, applied in the direction of non-electric variable control, multiple fluid ratio control, separation method, etc., can solve the problems of easy blockage of slurry supply pipeline, large delay, etc., to prevent blockage and improve desulfurization efficiency Effect

Inactive Publication Date: 2019-01-08
DATANG SHAANXI POWER GENERATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the reasons of the process system itself, this control method has a large delay, and due to the gate control, the flow rate of the slurry supply varies from time to time, which is easy to block the slurry supply pipeline.

Method used

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  • Automatic adjusting and control method for pH of slurry of absorption tower
  • Automatic adjusting and control method for pH of slurry of absorption tower

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Embodiment Construction

[0012] The present invention will be clearly and completely described below in conjunction with the accompanying drawings, so that those skilled in the art can fully implement the present invention without creative work.

[0013] The specific embodiment of the present invention is: as Figure 1-2 Shown are the schematic diagram of the control principle diagram of the electric valve for slurry supply and the schematic diagram of the control principle diagram of the flushing electric valve of the present invention, a method for automatic adjustment and control of the pH of the slurry in the absorption tower, the method includes: setting the target value of the pH value; pH value: According to the deviation between the detected pH value and the set pH target value, the action of the electric valve of the slurry supply switch is interlocked, so that the pH value is controlled at the pH target value.

[0014] Further, the closed-loop intermittent control method of the slurry supply...

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Abstract

The invention provides an automatic adjusting and control method for pH of slurry of an absorption tower. The method comprises steps as follows: the target value of the pH value is set; the pH value of the slurry at an outlet of the absorption tower is detected; and the action of a slurry supply switch electric valve is interlocked according to the difference between the detected pH value and theset pH value, so that the pH value is controlled at the target pH value. According to the method, the pH value of the slurry of the absorption tower is controlled automatically by the aid of the slurry supply switch electric valve through closed-loop intermittent control, the pH value is controlled within the set range, the desulphurization efficiency of the absorption tower is improved, and a slurry supply pipeline is washed automatically and is prevented from being blocked.

Description

technical field [0001] The invention belongs to the technical field of slurry adjustment in an absorption tower of a thermal power plant, and in particular relates to a method for automatically adjusting and controlling the pH of the absorption tower slurry. Background technique [0002] The pH value of the absorption tower slurry is an important operating parameter of the limestone gypsum wet desulfurization system, and the pH value reflects the CaCO concentration in the absorption tower slurry. 3 , CaSO 3 .1 / 2H2O, CaSO 4 .2H 2 O content and solubility have a great influence on the desulfurization efficiency. The general control range of PH value is 4.6-5.8. The PH value control system of the absorption tower mainly ensures the PH value of the slurry by adjusting the flow rate of the limestone slurry flowing into the absorption tower. After comparing with the set value, the opening degree of the limestone slurry feeding adjustment door is controlled through a single cir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50G05D21/02
CPCB01D53/346B01D53/50B01D53/80G05D21/02B01D2258/0283
Inventor 王军锋张安祥樊建平齐少林王崇博
Owner DATANG SHAANXI POWER GENERATION
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