Water circulating system and method of PM2.5 flue gas treatment tower

A technology of circulation system and water circulation, applied in separation methods, chemical instruments and methods, water/sewage multi-stage treatment, etc., to achieve the effect of increasing the difficulty and increasing the content

Active Publication Date: 2014-04-02
SHANGHAI LONGKING ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the deficiencies in the prior art above, the present invention proposes a PM2.5 flue gas treatment tower water circulation system and method that can solve the problem of water balance in the flue gas treatment tower

Method used

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  • Water circulating system and method of PM2.5 flue gas treatment tower
  • Water circulating system and method of PM2.5 flue gas treatment tower
  • Water circulating system and method of PM2.5 flue gas treatment tower

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Embodiment 1

[0046] figure 1 It is a structural schematic diagram of the water circulation system of the PM2.5 flue gas treatment tower of the present invention. Such as figure 1 As shown, a PM2.5 flue gas treatment tower water circulation system proposed in this embodiment includes: a flue gas treatment tower 100 integrating wet desulfurization and wet electrostatic precipitator, used for dehydration treatment of the exhaust gas discharged from the flue gas treatment tower 100 A dehydrator 200 for mixed waste liquid, a gypsum cyclone station 300 for removing particulate matter in the mixed waste liquid, a sedimentation tank 400 for adding coagulant and gravity sedimentation to the mixed waste liquid, and used for The filter 500 for multi-stage filtration of the mixed waste liquid, the pH adjustment tank 600 for adjusting the pH value of the mixed waste liquid, the circulating water tank 700 for providing circulating water for the flue gas treatment tower, and the Supplement the water su...

Embodiment 2

[0052] This embodiment proposes a PM2.5 flue gas treatment tower water circulation method, which is used to process and recycle the mixed waste liquid mixed and discharged from the flushing water in the electric field section of the flue gas treatment tower and the gypsum slurry in the desulfurization section. figure 1 shown, including the following steps:

[0053] Dehydration step: the mixed waste liquid is transported to the gypsum dehydration belt used as dehydrator 200 for dehydration, the gypsum is transported to the gypsum storage room 900, and the filtrate after pressure filtration by the gypsum dehydration belt is input into the next step.

[0054] Secondary particle removal step: the filtrate is input into the gypsum cyclone station 300 for secondary particle removal.

[0055] Sedimentation step: the liquid after the secondary particle removal step is input into the sedimentation tank 400, and the particles in the liquid are partially removed by sedimentation under th...

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Abstract

The invention discloses a water circulating system and a water circulating method of a PM2.5 flue gas treatment tower. The water circulating system comprises a flue gas treatment tower, a dehydrator, a gypsum hydrocyclone station, a sedimentation tank, a filter, a pH regulating tank, a circulating water tank and a water supply tank, wherein the flue gas treatment tower is communicated and connected to the dehydrator, the dehydrator is communicated and connected to the gypsum hydrocyclone station, the gypsum hydrocyclone station is communicated and connected to the sedimentation tank, the sedimentation tank is communicated and connected to the filter, the filter is communicated and connected to the circulating water tank, the water supply tank is communicated and connected to the circulating water tank, the pH regulating tank is communicated and connected to the circulating water tank, and the circulating water tank is communicated and connected to a water utilization opening of the flue gas treatment tower to form a water circulation loop. By adopting the water circulating system and method disclosed by the invention, basic balance between wash water recycling dosage and polar plate wash water of a wet electric dust collector is guaranteed, no new water consumption is added and the water balance problem of the flue gas treatment tower can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of water circulation treatment technology of an air pollution control system, in particular to a water circulation system and method of a PM2.5 flue gas treatment tower. Background technique [0002] The country pays more and more attention to environmental protection, fine dust, SO 3 , mercury, aerosol pollutants, etc. have emission reduction requirements. The new national "Ambient Air Quality Standard (GB3095-2012)" also includes PM2.5 into the ambient air quality standard; Higher requirements, the latest "Emission Standards of Air Pollutants for Thermal Power Plants (implemented on January 1, 2012)" Part specific requirements: [0003] [0004] Most power plants in my country use wet desulfurization. Generally, desulfurization devices do not have GGH, and the exhaust gas temperature after desulfurization is only about 50°C. Although the chimneys have been treated with anti-corrosion, the anti-corrosio...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/96B01D53/50B03C3/78B03C3/16C02F9/04B01D21/02
Inventor 高继贤范治国洪小松阎冬
Owner SHANGHAI LONGKING ENVIRONMENTAL PROTECTION
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