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Desulfurization and white smoke elimination device

A desulfurization section and shell technology, which is applied to the field of desulfurization and whitening devices, can solve the problems of high investment cost, waste of energy and water resources, and colored plumes with only investment but no income, so as to reduce operating costs, save water resources, The effect of good social and economic impact

Pending Publication Date: 2020-08-04
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 desulfurization and whitening device

Method used

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  • Desulfurization and white smoke elimination device
  • Desulfurization and white smoke elimination device
  • Desulfurization and white smoke elimination device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a device for desulfurization and whitening, 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,

[0052] 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;

[0053] 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 3-1, and th...

Embodiment 2

[0066] This embodiment provides a device for desulfurization and whitening. 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 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 first spray The flue gas is circulated and sprayed in the shower layer 3-3; 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 a closed Mechanical ventilation cooling tower; Water storage device 7 is a clear water tank;

[0067] In the non-heating season, the absorption section can also use clean wa...

Embodiment 3

[0070] This embodiment provides a device for desulfurization and whitening, 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 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 the low-temperature heating system passes through the first heat exchanger 10, the second heat exchanger 11 and the third heat exchanger 12 in sequence, and is connected with the incoming water The material in the corresponding heat exchanger performs heat exchange;

[0071] 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...

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Abstract

The invention discloses a desulfurization and white smoke elimination device. According to the device, a desulfurization section and an absorption section are sequentially arranged in a shell of a flue gas 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, and a second spraying layer is arranged between the flue gas inlet of the desulfurization section and the liquid storage unit. Flue gas enters the absorption section from the desulfurization section, and is in countercurrent contact with a concentrated solution or clear water sprayed at the top of the absorption section. In the heating season, the concentrated solution absorbs water in the flue gas and becomes thin, latent heat is released in a precipitated moisture phase change process to heat flue gas and saline solution, theheated solution is collected by the liquid storage unit, heat exchange is conducted through a first heat exchanger on the first circulation loop, the balance state in the absorption section is flexibly controlled through the amount of taken-away heat, sensible heat of raw flue gas and latent heat of purified flue gas water vapor are deeply recycled, the situation that in the prior art, a large number of cold sources are needed for flue gas cooling and condensation is avoided, and water resources are greatly saved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a 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. The cold sou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18B01D53/14B01D53/26
CPCB01D53/1425B01D53/18B01D53/263B01D2258/0283
Inventor 夏怀鹏王争荣汪洋胡小夫李伟王桦张南极沈建永沈明忠
Owner CHINA HUADIAN ENG
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