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Dual-regenerative flue gas treatment system

A flue gas treatment system and regeneration system technology, applied in the direction of dispersed particle separation, chemical instruments and methods, separation methods, etc., can solve the problems of inability to deeply utilize the large amount of latent heat of flue gas water vapor, waste of energy and water resources, high investment costs, etc. problems, achieve good social and economic impacts, reduce operating costs, and save water resources

Pending Publication Date: 2019-05-31
CHINA HUADIAN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is that the existing technical route for recovering flue gas waste heat cannot make deep use of the sensible heat of the original flue gas and the large amount of latent heat of water vapor in the cleaned flue gas, and at the same time energy and water resources are wasted, and the investment cost is high , to eliminate the defect that the colored plume has only investment but no return, thus a double regeneration flue gas treatment system is proposed

Method used

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  • Dual-regenerative flue gas treatment system

Examples

Experimental program
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Effect test

Embodiment 1

[0054] This embodiment provides a dual regeneration flue gas treatment system, such as figure 1 and 2 As shown, it includes a dedusting device 1, a desulfurization device 2 and an absorption device 3 connected in sequence. For example, the dedusting device 1 can be an electric precipitator, the desulfurization device 2 can be a desulfurization tower, the absorption device 3 can be an absorption tower, and the absorption tower can be a desulfurization tower. Empty tower or packed tower, when it is a packed tower, the packing can be single layer or multi-layer, use the packing as the gas-liquid contact surface, when it is an empty tower, use the empty tower to spray to form the gas-liquid contact surface, the lower part of the absorption device 3 The flue gas inlet 3-4 is set, the flue gas outlet 3-5 is set on the upper part, and also includes,

[0055] The first circulation circuit, its liquid inlet port communicates with the bottom of the absorption device 3, and the liquid o...

Embodiment 2

[0078] This embodiment provides a dual regeneration flue gas treatment system. On the basis of the above-mentioned embodiment 1, in order to improve the heat exchange effect, the sensible heat in the original flue gas and the latent heat of the clean flue gas water vapor are fully recovered, and the The waste liquid is fully regenerated, and also includes a second heat exchanger 9. The lower part of the absorption device 3, the second heat exchanger 9, and the second spray unit 3-2 are connected in sequence to send the dilute solution into the first Second spray unit 3-2; meanwhile, in order to filter and modulate the concentrated solution as the absorption liquid in the absorption device, it also includes a solution filtration and conditioning system 7, the bottom of the absorption device 3, the solution filtration and conditioning system 7, the second The heat exchanger 9 and the second spray unit 3-2 are connected in sequence, so that the dilute solution is sent to the secon...

Embodiment 3

[0080] This embodiment provides a dual regeneration flue gas treatment system, on the basis of the above embodiment 1 or 2, it also includes a third heat exchanger 10 and a fourth heat exchanger 11, the first heat exchanger 8, the second heat exchanger The second heat exchanger 9, the third heat exchanger 10, and the fourth heat exchanger 11 are connected in sequence, so that the incoming water from the heating network or the condensed water at low temperature can pass through the first heat exchanger 8, the second heat exchanger 9, and the fourth heat exchanger in sequence. Three heat exchangers 10 and a fourth heat exchanger 11, and exchange heat with the substances entering the corresponding heat exchangers;

[0081] Further, the sixth heat exchanger 17 and / or the eighth heat exchanger 27 are communicated with the fourth heat exchanger 11 respectively, so as to transfer the exhaust condensed water of the sixth heat exchanger 17 and / or the eighth heat exchanger 27 After bein...

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Abstract

The invention discloses a dual-regenerative flue gas treatment system. The dual-regenerative flue gas treatment system has the advantages that a liquid storage unit arranged in an absorption device divides an inner cavity into a first flue gas treatment area and a second flue gas treatment area, flue gases flow from the bottom of the absorption device to be in countercurrent contact with concentrated solutions sprayed at the top of the absorption device, the concentrated solutions of the second flue gas treatment area absorb water in the flue gases to become dilute, and the latent heat released during water phase change is precipitated out to heat the flue gases and the concentrated solutions to 55-65 DEG C; the heated concentrated solutions are guided by the liquid storage unit to enter afirst heat exchanger to exchange heat with heat exchange media, and then enter the first flue gas treatment area to continue absorbing the water in the flue gases after being cooled to the temperature approximately equal to a top solution inlet of the second flue gas treatment area; the graded heat exchange is used for the first time, and the sensible heat of the original flue gases and the latent heat of purified flue gas water vapor are deeply recycled and utilized; the connection mode of a regeneration system is flexibly selected according to the characteristics of the heating season and the non-heating seasons, and accordingly, the energy consumption is lowered.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a double regeneration flue gas treatment system. Background technique [0002] With the development of my country's economy, in order to actively respond to the "Shanghai Coal-fired Power Plant Gypsum Rain and Colored Plume Test Technical Requirements (Trial)", Zhejiang "Coal-fired Power Plant Air Pollutant Emission Standards" (draft for proposals), Tianjin "Notice on Further Strengthening the In-depth Control of Air Pollution in Key Industries such as Thermal Power and Iron and Steel in Our City" and the regulations for eliminating colored plumes in Tangshan, Zhangjiakou, Handan and other places in Hebei. Various technical routes for recovering flue gas waste heat have been developed. The common technical route is to arrange flue gas condensers, spray towers or add slurry coolers on the slurry circulation slurry pipes after the desulfurization tower t...

Claims

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Application Information

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IPC IPC(8): B01D53/00
Inventor 王争荣沈明忠汪洋耿宣胡小夫夏怀鹏苏军划沈建永李伟王桦
Owner CHINA HUADIAN ENG
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