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Regenerable cyclic absorption flue gas desulfurization technology

A technology of desulfurization process and absorption method, which is applied in the field of flue gas desulfurization process of renewable cyclic absorption method, can solve the problems of increasing processing capacity, system difficulty, high energy consumption, etc., reduce circulation amount and loss, improve desulfurization efficiency, solve The effect of large loss

Inactive Publication Date: 2017-01-11
CHENGDU HUAXITANG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent "Heat pump regeneration process of desulfurization solvent in flue gas desulfurization by solvent circulation absorption method" (application number: 201110128227.0) introduces the heat pump technology used in the regeneration cycle process, see figure 2 , but did not realize that the heat pump needs to generate the saturated steam required by the compressor before establishing heat balance, and at the same time did not consider the problem that the gas cannot be drawn out after the superheated steam is condensed in the reboiler, which will cause difficulties in the actual use of the system
In order to meet the desulfurization efficiency, it is usually necessary to add an excessive amount of absorbent to contact with the flue gas, which fails to give full play to the desulfurization capacity of the absorbent, thereby increasing the processing capacity in the "regeneration cycle" process, resulting in high energy consumption

Method used

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  • Regenerable cyclic absorption flue gas desulfurization technology
  • Regenerable cyclic absorption flue gas desulfurization technology
  • Regenerable cyclic absorption flue gas desulfurization technology

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This embodiment relates to the renewable cycle absorption flue gas desulfurization process of iron and steel and non-ferrous metallurgy sintering flue gas, including the following process steps:

[0049] A: The flue gas from the coal-fired power plant boiler is cooled to 40°C after dedusting and washing, and then sent to the bubble tower 1;

[0050] B: Coal-fired power plant boiler flue gas is sent into the inlet space 7 of the bubble tower 1, and the bubble pipe 8 guides the flue gas into the liquid layer of the absorbent liquid phase area at the lower part of the absorption tower at a certain pressure for 250mm to form bubbles In the bubbling area, the flue gas fully contacts and reacts with the absorbent, and the SO in the flue gas 2 After the impurities are absorbed, the clean flue gas reaches the upper outlet space 9 through the riser pipe 11, and then is emptied by the absorption tower chimney after passing through the washing section and the demisting section;

...

Embodiment 2

[0055] This embodiment relates to a renewable cyclic absorption flue gas desulfurization process for flue gas of a coal-fired power plant boiler, including the following process steps:

[0056] A: The flue gas from iron and steel and non-ferrous metallurgy sintering is dedusted and washed, then cooled to 45°C, and then sent to bubble tower 1;

[0057] B: The sintering flue gas of iron and steel and non-ferrous metallurgy is sent into the inlet space 7 of the bubble tower 1, and the bubble pipe 8 guides the flue gas into the liquid layer of the absorbent liquid phase area at the lower part of the absorption tower for 200mm at a certain pressure, forming a bubble In the bubble area, the flue gas in the bubble area fully contacts and reacts with the absorbent, and the SO in the flue gas 2 After the impurities are absorbed, the clean flue gas reaches the upper outlet space 9 through the riser pipe 11, and then is emptied by the absorption tower chimney after passing through the wa...

Embodiment 3

[0062] This embodiment relates to a renewable cyclic absorption flue gas desulfurization process for industrial furnace flue gas, including the following process steps:

[0063] A: After dust removal and washing, the flue gas from the industrial kiln is cooled to 45°C, and then sent to the bubble tower 1;

[0064] B: Industrial furnace flue gas is sent into the entrance space 7 of the bubble tower 1, and the bubble pipe 8 guides the flue gas into the liquid layer of the absorbent liquid phase area at the lower part of the absorption tower for 200mm at a certain pressure, forming a bubble area , the flue gas in the bubbling area fully contacts and reacts with the absorbent, the SO in the flue gas 2 After the impurities are absorbed, the clean flue gas reaches the upper outlet space 9 through the riser pipe 11, and then is emptied by the absorption tower chimney after passing through the washing section and the demisting section;

[0065] C: The rich liquid is boosted from the ...

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Abstract

The invention discloses a regenerable cyclic absorption flue gas desulfurization technology which comprises the following steps of: delivering flue gas into an absorbent liquid layer in a bubbling tower, to obtain a purified gas and rich liquor; delivering the rich liquor to a regeneration tower through a barren and rich liquor heat exchanger, performing heat exchange between barren liquor without SO2 and rich liquor, and then delivering to the bubbling tower as an absorbent for cyclic use. The bubbling tower is adopted to replace a filling tower and a spraying tower used at the existing desulfurization section, and under the matching of the regeneration section, the desulfurization effect of the flue gas can be obviously improved, the effective sulfur capacity of the absorbent can be increased, so that the cyclic quantity and loss of the absorbent in the regenerable cyclic absorption method can be reduced, the regenerable energy consumption of the absorbent can be reduced, the economic benefit of the regenerable cyclic desulfurization technology can be increased, and the application range can be expanded.

Description

technical field [0001] The invention relates to a flue gas desulfurization process of a renewable cyclic absorption method, specifically relates to the flue gas desulfurization process of a renewable cyclic absorption method completed by using a new type of desulfurization equipment, and belongs to the technical fields of environmental protection and gas purification and separation. Background technique [0002] In recent years, as the air pollution has become more and more serious, people have put forward higher requirements for the treatment of flue gas. The primary pollutant in air pollution is sulfur dioxide, and its annual emission has ranked first in the world for many years. Hundreds of billions of yuan are lost every year due to sulfur dioxide emissions. For this reason, the Ministry of Environmental Protection and various local governments have formulated stricter emission standards and put forward higher emission limits for pollutant flue gas produced by coal-fired...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/14B01D53/1425B01D53/1481
Inventor 汤茂辉李东林任毅周礼
Owner CHENGDU HUAXITANG ENVIRONMENTAL PROTECTION TECH CO LTD
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