Raw flue gas dechlorinating device for wet desulphurization system

A wet desulfurization, raw flue gas technology, applied in gas treatment, separation methods, chlorine/hydrogen chloride, etc.

Pending Publication Date: 2020-12-11
NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the policy standards are refined, the definition of desulfurization wastewater terminal solid waste is upgraded or the downstream industry standards for resource utilization of fly ash are improved, this method will face the situation of upgrading and transformation again

Method used

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  • Raw flue gas dechlorinating device for wet desulphurization system
  • Raw flue gas dechlorinating device for wet desulphurization system

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The present invention is a kind of raw flue gas dechlorination device used in wet desulfurization system, such as figure 1 As shown, including fan 1, fan 1 is connected to the entrance of desulfurization absorption tower 3 through the original flue 2, the original flue 2 is an L-shaped flue, the vertical flue section of the original flue 2 is connected to the outlet of the fan 2, and the original In the vertical flue section of channel 2, there is an HCl absorbing device horizontally. The HCl absorbing device includes a packing layer 7 and an absorbing layer 8 arranged up and down. The absorbing layer 8 includes defogging pipes 6 arranged horizontally in sequence. The two ends of 6 are fixed on the inner wall of the original flue 2. The cross-section of the defogging pipe 6 is an egg-shaped structure. There are four raised droplet barr...

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Abstract

The invention discloses a raw flue gas dechlorinating device for a wet desulphurization system. The device comprises a fan; the fan is connected with a desulphurization absorption tower through a rawflue; an HCl absorption device is arranged in the raw flue; the HCl absorption device comprises a packing layer and an absorption layer; the absorption layer comprises a demisting pipe which is horizontally arranged; a liquid holding tank is correspondingly arranged at the lower part of the demisting pipe; a circulating water branch pipe is arranged at the bottom of the liquid holding tank; a flowguide tank is arranged between the demisting pipe and the liquid holding tank; a liquid outlet of the liquid holding tank is connected with a first graphite cooler; the first graphite cooler is connected with a double-medium filter; the double-medium filter is connected with a high-pressure pump; the high-pressure pump is connected with a DTRO membrane device; a concentrated water outlet of the DTRO membrane device is connected with a desorption tower; the top of the desorption tower is connected with an industrial hydrochloric acid storage tank. With the dechlorinating device adopted, a newway for limestone gypsum wet desulphurization wastewater zero discharge engineering is developed. Thedechlorinating device has the advantages of low operation cost, resource utilization of industrialhydrochloric acid, no influence on resource utilization of fly ash, optimization of operation of a desulphurization system and the like.

Description

technical field [0001] The invention belongs to the technical field of zero discharge of waste water from limestone-gypsum wet desulfurization in a coal-fired power plant, and in particular relates to a raw flue gas dechlorination device used in a wet desulfurization system. Background technique [0002] Coal-fired enterprises, as large industrial water and drainage users, start from saving and protecting water resources, and aim to control the total amount of water used and improve water use efficiency. Use the principle of "to realize that the waste water is not discharged outside. With the increasing speed of the country's water environmental pollution control, in recent years, major power efficiency and power environmental protection companies have invested in the exploration of zero-discharge desulfurization wastewater technology and process research and development. [0003] The limestone-gypsum wet desulfurization chemical reaction process determines that the slurry ...

Claims

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Application Information

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IPC IPC(8): B01D53/18C01B7/07C01D3/04
CPCB01D53/1456B01D53/18B01D2252/103B01D2257/2045B01D2258/0283C01B7/0706C01D3/04
Inventor 贾西部袁园马强何新权吉攀
Owner NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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