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Dual regeneration energy saving device

A technology of absorption device and regeneration system, applied in the direction of steam generation, heating method, application, etc., can solve the problems of high investment cost, inability to make deep use of a large amount of latent heat of flue gas water vapor, waste of energy and water resources, etc., and achieve water conservation Effect

Pending Publication Date: 2019-06-04
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 dual regeneration and energy-saving device is proposed

Method used

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Examples

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Embodiment 1

[0052] This embodiment provides a double regeneration energy-saving device, 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. An empty tower or a packed tower, when it is a packed tower, the packing can be single-layer or multi-layer, the lower part of the absorption device 3 is provided with a flue gas inlet, and the upper part is provided with a flue gas outlet, and also includes,

[0053] The first circulation circuit, its liquid inlet port communicates with the bottom of the absorption device 3, and the liquid outlet port communicates with the upper part of the absorption device 3, a regeneration system is set on the first circulation circuit, th...

Embodiment 2

[0073] This embodiment provides a double regeneration and energy-saving device. On the basis of the above-mentioned embodiment 1, in order to filter and prepare the concentrated solution as the absorption liquid in the absorption device 3, it also includes a solution filtration conditioning system 7, the absorption device 3, the solution filtration and conditioning system 7, the second heat exchanger 9 and the second spray unit 3-2 are connected in sequence, so that the dilute solution is sent to the second spray unit 3 after filtration, conditioning and heat exchange -2; Specifically, the solution filtration and conditioning system 7 is composed of a cyclone + filter connected in sequence, and a solution replenishment tank 21 and a fifth pump 22 connected in sequence are arranged at the same time, and the fifth pump 22 is connected with the solution filtration and conditioning system 7 connected to replenish the solution.

Embodiment 3

[0075] This embodiment provides a double regeneration energy-saving device, on the basis of the above-mentioned embodiment 1 or 2, it also includes a third heat exchanger 10 and a fourth heat exchanger 11, the second heat exchanger 9, the third heat exchanger The 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 of the low-temperature heating system passes through the second heat exchanger 9, the third heat exchanger 10 and the fourth heat exchanger 11 in sequence, and is connected with the incoming water The material in the corresponding heat exchanger performs heat exchange;

[0076] Further, the sixth heat exchanger 17 and / or the seventh heat exchanger 26 communicate with the fourth heat exchanger 11 respectively, so as to transfer the exhaust condensed water of the sixth heat exchanger 17 and / or the seventh heat exchanger 26 After being sent to the fourth heat exchanger 1...

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Abstract

The invention discloses a dual regeneration energy saving device. The dual regeneration energy saving device is provided with a first circulation loop, at least a stage of second circulation loop, a refrigerating device and at least a stage of second heat exchanger, and flue gas enters from the bottom of an absorption device to be in countercurrent contact with a concentrated solution or clean water sprayed from the top of the absorption device. During a heating season, the concentrated solution absorbs the water in the flue gas to become thinner, the latent heat released in the phase change process of water is dissolved out, the flue gas and a salt solution are heated, the heated solution is subjected to heat exchange through a second heat exchanger or a refrigeration device on the secondcirculation loop, and the equilibrium state in the absorption device can be flexibly controlled by using the amount of the heat taken away; in a non-heating season, the clean water can be used for spraying to cool the flue gas except using the concentrated solution, the saturated net flue gas can be cooled and analyzed, the water lifting effect is achieved, and the heated water can be recycled after being subjected to heat exchange by the second heat exchanger or the refrigeration device; and finally, the sensible heat of the original flue gas and the latent heat of the net flue gas water vapor are deeply recovered and utilized by the above means.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a double regeneration and energy-saving device. 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 to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/02F23J15/04F23J15/06F23J15/08F24D3/10F28D21/00F22B3/04
CPCY02E20/30
Inventor 王争荣沈明忠汪洋胡小夫耿宣夏怀鹏苏军划沈建永李伟王桦
Owner CHINA HUADIAN ENG
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