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Wet flue gas desulfurization gypsum dehydration system and control method

A technology of wet desulfurization and control method, which is applied in the direction of separation method, chemical instrument and method, filtration circuit, etc. It can solve the problems of complicated operation steps, impurities in slurry, and ineffective use of reaction liquid, etc., and achieve simplified operation steps , avoid safety accidents, and effectively use the effect

Active Publication Date: 2021-09-24
HUANENG QINMEI RUIJIN POWER GENERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problems in the existing wet desulfurization gypsum dehydration system and control method, the operation steps are complicated, the reaction liquid cannot be effectively used, and there are impurities in the slurry, it is proposed invention

Method used

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  • Wet flue gas desulfurization gypsum dehydration system and control method
  • Wet flue gas desulfurization gypsum dehydration system and control method
  • Wet flue gas desulfurization gypsum dehydration system and control method

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Embodiment 1

[0029] refer to Figure 1-4 , a wet desulfurization gypsum dehydration system, comprising, dehydration module 100, including absorption tower 101, cyclone 102, belt dehydrator 103 and gypsum storehouse 104; and filtrate recovery module 200, including filtrate connected with belt dehydrator 103 Water tank 201, filtrate water pump 202 and flow monitoring block 203 arranged on filtrate water tank 201, absorption tower 101, cyclone 102, belt dehydrator 103, gypsum storage 104, filtrate water tank 201, filtrate water pump 202 and flow monitoring block 203 are connected by pipeline; between the absorption tower 101 and the cyclone 102, a gypsum discharge valve 105 and a drain valve 106 are arranged; the filtrate water tank 201 is connected with the absorption tower 101, and a Vacuum pump 204, vacuum pump 204 is provided with vacuum pump sealing water valve 205; Between cyclone 102 and belt dehydrator 103, is provided with impurity removal block, impurity removal block includes filte...

Embodiment 2

[0037] refer to Figure 1-4 , This embodiment is different from the first embodiment in that: this embodiment discloses a wet desulfurization gypsum dehydration control method, which has two circulation modes:

[0038] When the water flow of the flow monitoring block 203 does not alarm, the wet desulfurization gypsum dehydration system starts cycle I;

[0039] When the water flow monitoring block 203 alarms when the water flow is too low, the wet desulfurization gypsum dehydration system starts cycle II.

[0040] The start-up cycle Ⅰ of the wet desulfurization gypsum dehydration system includes:

[0041] When the wet desulfurization gypsum dehydration system does not detect that the water flow value passing through the flow monitoring block 203 is too low, it first uses the filter cloth flushing water tank 109 to flush the belt dehydrator 103, the slurry flows out from the absorption tower 101, and the cyclone 102 performs preliminary separation treatment on the slurry, and ...

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Abstract

The invention discloses a wet flue gas desulfurization gypsum dehydration system which comprises a dehydration module and a filter liquor recovery module, wherein the dehydration module comprises an absorption tower, a cyclone, a belt dehydrator and a gypsum warehouse; and the filter liquor recovery module comprises a filter liquor tank connected with the belt dehydrator, a filter liquor pump arranged on the filter liquor tank and a flow monitoring module, and the absorption tower, the cyclone, the belt dehydrator, the gypsum warehouse, the filter liquor tank, the filter liquor pump and the flow monitoring module are connected through pipelines. According to the invention, the problems that the slurry contains impurities, and the system cannot normally operate due to the fact that the cyclone is blocked after the slurry flows into the cyclone are solved. The operation steps of the wet desulphurization gypsum dehydration system are simplified, the reaction liquid is effectively utilized, the water flow of the whole system is monitored, and safety accidents caused by idle running of the device due to too low water flow are avoided.

Description

technical field [0001] The invention relates to the technical field of wet desulfurization gypsum dehydration, in particular to a wet desulfurization gypsum dehydration system and a control method. Background technique [0002] At present, the limestone-gypsum wet flue gas desulfurization process is the most extensive technical route for coal-fired power plants in my country, and domestic projects account for more than 85%. Among them, the wet desulfurization gypsum dehydration system has complicated operation steps, and the reaction liquid cannot be effectively utilized. It is easy to cause waste. During the gypsum dehydration process, the slurry contains impurities such as sediment. During operation, the impurities will block the cyclone after flowing into the cyclone, resulting in the system not operating normally. Contents of the invention [0003] The purpose of this section is to outline some aspects of embodiments of the invention and briefly describe some preferred ...

Claims

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Application Information

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IPC IPC(8): B01D53/96B01D53/80B01D53/48B01D53/34B01D36/00B04C9/00
CPCB01D53/96B01D53/80B01D53/48B01D53/346B01D36/003B04C9/00B01D2258/0283B04C2009/002
Inventor 邵丽华付小东文少磊夏良徐亮皮永红刘志卿单威张承祥安鸿飞胡俊张源孔祥毅王强
Owner HUANENG QINMEI RUIJIN POWER GENERATION CO LTD
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