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Method and device for measuring density or PH value of slurry of single-tower double-circulation flue gas desulfurization AFT tower and collecting discharged slurry

A double cycle, tower slurry technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., to achieve the effects of improving desulfurization efficiency, shortening operation time, and small engineering

Inactive Publication Date: 2019-07-26
NINGXIA YINGLITE CHEMICALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems existing in the existing single-tower double-circulation flue gas desulfurization device, and to provide a method and device for measuring the slurry density or PH value of the AFT tower slurry in the single-tower double-circulation flue gas desulfurization technology

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  • Method and device for measuring density or PH value of slurry of single-tower double-circulation flue gas desulfurization AFT tower and collecting discharged slurry

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Embodiment 1

[0011] Embodiment 1: Single-tower double-circulation flue gas desulfurization AFT tower PH meter, density meter discharge slurry collection method, take the AFT tower density meter or PH meter from the bottom AFT tower 1 to measure the sampling slurry, and enter the density meter or PH meter through the control valve 2 3. Enter the inlet pipe 7 of the slurry circulation pump 6 through the outlet pipe 4 and the outlet control valve 5, mix with the slurry sucked by the slurry circulation pump from the absorption tower 8, and enter the spray layer 9 for spray desulfurization.

[0012] The slurry density or PH value measurement and discharge collection device of the AFT tower in the single-tower double-circulation flue gas desulfurization, the device includes a control valve 2, a density meter or a PH meter 3, an outlet pipe 4, an outlet control valve 5, a slurry circulation pump 6 and an inlet Tube 7. One end of the outlet pipe 4 is connected to the inlet pipe 7, and the other en...

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Abstract

The invention relates to a method and device for measuring density or PH value of slurry of single-tower double-circulation flue gas desulfurization AFT tower and collecting discharged slurry. The liquid level of the AFT tower is controlled to be 20 meters or above in a daily operation process. The liquid level of an absorption tower is controlled to be 10 meters or below, the slurry discharged from an AFT tower densitometer or a PH meter measuring pipe is directly introduced into an inlet pipe of a slurry circulating pump of the lowest spray layer pipe of the absorption tower by the liquid level difference between the AFT tower and the absorption tower, the discharged slurry is mixed with the slurry absorbed by a slurry circulating pump of the lower layer of the absorption tower, and themixture is delivered to the spray layer, is sprayed via the slurry circulating pump, directly participates in flue gas desulfurization and no longer enters a pit system. The running time of a pit pumpis shortened effectively, and meanwhile, the desulfurization efficiency is improved. The technological process is simple, the engineering quantity is small, and normal and stable running of a systemis not affected.

Description

technical field [0001] The invention belongs to the technical field of single-tower double-circulation flue gas desulfurization, and in particular relates to a method and device for measuring and discharging slurry of an AFT tower in the single-tower double-circulation flue gas desulfurization technology. Background technique [0002] Single-tower double-circulation is an effective technical route for flue gas desulfurization in thermal power generation, iron and steel and other coal-fired industries to achieve ultra-low emission standards. The sulfur dioxide in the flue gas is converted into sub- Calcium sulfate is then converted into gypsum by forced oxidation to achieve the purpose of desulfurization. In order to accurately measure the density and pH value of the slurry in the AFT tower, generally a slurry discharge pipe is led to the trench at the bottom of the AFT tower, and a density meter and a PH meter are installed on the slurry discharge pipe. During the operation...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50
CPCB01D53/501B01D2251/404B01D2258/0283
Inventor 金鑫
Owner NINGXIA YINGLITE CHEMICALS CO LTD
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