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Water-saving and energy-saving ammonia desulphurization discharge process and system capable of preventing ammonia from escaping from aerosol

An ammonia desulfurization and emission system technology, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve problems such as visual pollution, smoke trailing and falling, and secondary environmental pollution.

Inactive Publication Date: 2020-10-30
江苏昆仑互联科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Ammonia escaping aerosol causes waste of absorbent and secondary pollution of the environment, and the flue gas trails and falls, forming serious visual pollution

Method used

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  • Water-saving and energy-saving ammonia desulphurization discharge process and system capable of preventing ammonia from escaping from aerosol
  • Water-saving and energy-saving ammonia desulphurization discharge process and system capable of preventing ammonia from escaping from aerosol
  • Water-saving and energy-saving ammonia desulphurization discharge process and system capable of preventing ammonia from escaping from aerosol

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Such as figure 1 As shown, a water-saving and energy-saving ammonia desulfurization ultra-clean discharge system that prevents ammonia from escaping aerosols includes a desulfurization tower 20, a multifunctional circulation tank 21, a crystallization particle enlargement system 32, and a cooling tower 31. The desulfurization tower 20 passes through The pipelines are respectively connected with the multi-functional circulation tank 21 , the crystal grain increasing system 32 and the cooling tower 31 .

[0062] The desulfurization tower 20 includes a flue gas inlet 33, an absorption zone spray layer 9, and an absorption zone 10; the upper part of the absorption zone 10 is also provided with an ammonia capture zone spray layer 11 and an ammonia capture zone 12; the upper part of the ammonia capture zone 12 is also There are washing and purification zone 15, a spraying layer 14 for the first stage of washing, a second zone for washing and purification 15, and a spraying la...

Embodiment 2

[0083] The present invention also proposes a water-saving and energy-saving ammonia-based desulfurization ultra-clean discharge process that prevents ammonia from escaping aerosols, such as figure 1 As shown, the original flue gas enters the desulfurization tower cooling concentration crystallization zone 3 from the flue gas inlet 33 of the multi-section desulfurization tower 20, and enters the absorption zone 10 through the first breathable liquid collection cap 501 after being sprayed and cooled by the concentrated spray layer 4. The sulfuric acid gas in the flue gas is absorbed by the absorption liquid, and the flue gas enters the ammonia capture area 12 through the second breathable liquid collection cap 502, and the escaped ammonia gas is absorbed by the spray liquid, and the flue gas entrained with liquid droplets is removed by the high-efficiency demister 13 After the mist, it enters the washing and purification area 15 and the washing and purification area 17 successive...

Embodiment 3

[0101] Such as figure 1 As shown, the technical implementation steps of the process of the present invention are as follows: the flue gas enters the cooling concentration crystallization zone 3 from the flue gas inlet 33 of the multi-section desulfurization tower 20, and the slurry extracted from the concentrated slurry pool by the concentrated circulation pump a is passed through the concentrated spray layer 4 Spraying, reverse contact, mass transfer and heat transfer, the water in the slurry is evaporated to form a supersaturated slurry, and ammonium sulfate crystals are precipitated, falling into the concentrated slurry pool 2, and so on. Concentrated slurry tank 2 is provided with disturbance pipe network 1, and the slurry is pumped by disturbance circulation pump b and sprayed through the pipeline network to disturb the slurry tank to prevent the precipitation and hardening of ammonium sulfate crystals. It is more optimal, and at the same time, it avoids the cavitation of...

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Abstract

The invention discloses a water-saving and energy-saving ammonia desulphurization ultra-clean discharge system and process capable of preventing ammonia from escaping from aerosol. The system comprises a slurry disturbance system, a cooling concentration crystallization system, a sulfur oxide absorption system, an ammonia capture system, a washing purification system and a crystal particle enlarging system, circulating spray liquid of the desulfurizing tower from bottom to top adopts solutions with different components, and the concentration gradient is decreased progressively so that the desulfurizing efficiency is effectively improved, escape of aerosol and ammonia is avoided, and the phenomena of trailing and falling of ammonia-process desulfurized flue gas are eliminated. Different technologies such as multi-stage cyclone coupling, packing, a demister, an efficient cyclone water film dust collector and a wire mesh demister are combined, optimization of the distribution condition offlue gas in the tower is achieved, the retention reaction time of the flue gas is prolonged, further coagulation of fine particles and trapping of slurry droplets are promoted, the flue gas is washedthrough low-temperature washing liquid of the external cooling tower, cooperative removal of the fine particles is achieved, and ultra-clean emission is achieved.

Description

technical field [0001] The invention belongs to the field of industrial flue gas treatment, and specifically relates to a high-efficiency, water-saving and energy-saving ammonia desulfurization ultra-clean discharge process and system for eliminating ammonia escape aerosol, which can prevent the generation of ammonia escape aerosol in ammonia desulfurization devices. High-efficiency water-saving and energy-saving ultra-low emission processes and devices. Background technique [0002] Facing an increasingly severe environment, the country has higher and higher requirements for pollution emissions. The country has introduced relevant environmental protection policies such as the "Comprehensive Implementation of Ultra-low Emissions and Energy Conservation Retrofit Work Plans for Coal-fired Power Plants" in terms of atmospheric governance, and the emission requirements are getting higher and higher. It's getting tougher. my country is a coal-rich country. At present, coal is st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/79B01D53/18B01D50/00
CPCB01D53/504B01D53/79B01D53/185B01D53/1481B01D2251/2062B01D2258/0283B01D50/40
Inventor 曾辉徐志海周洪涛丁亮和王晓东
Owner 江苏昆仑互联科技有限公司
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