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Single-tower desulfurization white removal device

A technology in the whitening and desulfurization section, which is applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of high investment costs, waste of energy and water resources, and colored plumes with only investment but no income, etc., to achieve good results. Social and economic impacts, water conservation, and operating cost reduction effects

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

[0005] 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, and thus proposes a single-tower desulfurization and whitening device

Method used

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  • Single-tower desulfurization white removal device

Examples

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Embodiment 1

[0047] This embodiment provides a single-tower desulfurization and whitening device, such as figure 1 and 2 As shown, it includes a dust removal device 1, an economizer 2 and a flue gas purification device 3 connected in sequence. For example, the dust removal device 1 can be an electric dust collector, and the flue gas purification device 3 includes a housing, and also includes,

[0048] The desulfurization section 3-2 and the absorption section 3-1 are sequentially arranged in the shell from bottom to top; the absorption section 3-1 can be an empty tower section or a packed tower section, and when it is a packed tower section, the packing can be a single layer or multiple layers; the top of the absorption section 3-1 is provided with a net flue gas outlet;

[0049] The liquid storage unit 3-5 is arranged between the desulfurization section 3-2 and the absorption section 3-1, and is located in the casing to divide the desulfurization section 3-2 and the absorption section 3-...

Embodiment 2

[0061] This embodiment provides a single-tower desulfurization and whitening device. On the basis of the above-mentioned embodiment 1, it also includes a fifth circulation loop, whose liquid inlet is connected with the liquid storage unit 3-5, and the liquid outlet is connected with the first The spray layer 3-3 is connected, and the fifth circulation circuit is provided with a water storage device 7 and a refrigeration device 8, so that in the non-heating season, the water in the water storage device 7 is sent to the refrigeration device 8 for cooling, and then sent to the second A spray layer 3-3 is used to circulate and spray flue gas; in the heating season, the water in the liquid storage unit 3-5 is stored in the water storage device 7; in this embodiment, the refrigeration device 8 is a cooling tower or Closed mechanical ventilation cooling tower; water storage device 7 is a clean water tank;

[0062] In the non-heating season, the absorption section can also use clean w...

Embodiment 3

[0065] This embodiment provides a single-tower desulfurization and whitening device, on the basis of the above-mentioned embodiment 1 or 2, it also includes a second heat exchanger 11 and a third heat exchanger 12, the first heat exchanger 10, the second heat exchanger The second heat exchanger 11 and the third heat exchanger 12 are communicated in sequence, so that the incoming water from the heating network or the condensed water of low-temperature heating passes through the first heat exchanger 10, the second heat exchanger 11 and the third heat exchanger 12 in sequence, and Exchange heat with substances entering the corresponding heat exchanger;

[0066] The fifth heat exchanger 16 communicates with the second heat exchanger 11 and / or the third heat exchanger 12, so as to send the extraction condensed water of the fifth heat exchanger 16 into the second heat exchanger 11 and / or the third heat exchanger 11. After the heat exchange in the heat exchanger 12, it is returned to...

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Abstract

The invention discloses a single-tower desulfurization white removal device. According to the device, a desulfurization section and an absorption section are sequentially arranged in a shell of a fluegas purification device from bottom to top, a liquid storage unit with a specific structure is arranged between the desulfurization section and the absorption section, a first spraying layer is arranged between the absorption section and the top end of the shell, a second spraying layer is arranged between a flue gas inlet of the desulfurization section and the liquid storage unit, and flue gas enters the absorption section from the desulfurization section and contacts with concentrated solution or clear water sprayed from the top of the absorption section in a reverse flow manner. In the heating season, concentrated solution absorbs moisture in flue gas and is thinned, latent heat is released in the moisture separating out and phase changing process, the flue gas and the saline solutionare heated, heated solution is collected by the liquid storage unit, heat is exchanged by a first heat exchanger on a first circulation loop, an equilibrium state in the absorption section is flexiblycontrolled by the taken away heat, sensible heat of original flue gas and latent heat of clean flue gas are deeply recycled and utilized, a lot of cold sources needed by cooling and condensing of theflue gas in the prior art are avoided, and water sources are greatly saved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a single-tower desulfurization and whitening device. Background technique [0002] At present, the mainstream technology for eliminating wet plume is to arrange the flue gas condenser, spray tower or add a slurry cooler on the slurry circulation slurry pipe after the desulfurization tower, so that the flue gas at the outlet of the desulfurization tower cools down and precipitates moisture. Gas waste heat heats the clean flue gas. This type of technology not only cannot deeply recover a large amount of latent heat of water vapor in the clean flue gas, but also wastes the sensible heat of the original flue gas. At the same time, the condensation of the flue gas requires an external refrigerant, resulting in a huge waste of energy. [0003] In order to take away the latent heat of the net flue gas, a large amount of cooling circulating water is required....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/48B01D53/34
Inventor 王争荣沈明忠汪洋夏怀鹏耿宣胡小夫沈建永张南极孙福波康玉洁李伟王桦
Owner CHINA HUADIAN ENG
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