Method for recycling water from wet desulphurization flue gas and device thereof

A wet desulfurization and flue gas technology, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of large water consumption and application restrictions in water-scarce areas, and achieve economic cost reduction, energy saving and environmental protection. , the effect of saving water

Active Publication Date: 2014-04-09
BEIJING ZHONGNENG NUOTAI ENERGY SAVING & ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of flue gas purification, wet desulfurization technology is widely used, but its application in water-scarce areas is greatly limited due to its large water consumption

Method used

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  • Method for recycling water from wet desulphurization flue gas and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for recovering water in wet desulfurization flue gas of the present invention comprises the following steps:

[0021] (1) Cool down the original flue gas before wet desulfurization;

[0022] (2) cooling the circulating spray water used in the wet desulfurization treatment flue gas;

[0023] (3) Heating the clean flue gas.

[0024] For the above-mentioned method for recovering water in wet desulfurization flue gas, it can be carried out by the following device, such as figure 1 As shown, a device for recovering water in wet desulfurization flue gas includes a connected original flue 1, a wet desulfurization device and a clean flue 10, and also includes a connected raw flue gas cooling device, spraying Water cooling device and clean flue gas heating device, wherein, the original flue gas cooling device is connected to the original flue, and the spray water cooling device is connected to the wet desulfurization device.

[0025] In the above embodiments, the cle...

Embodiment 2

[0029] Such as figure 1 As shown, a method and device for recovering water in wet desulfurization flue gas of the present invention, its basic implementation steps and structural settings are the same as in Example 1, specifically:

[0030] The original flue gas cooling device, the spray water cooling device and the net flue gas heating device share a cold source heat pump 19; in the step (1), step (2) and step (3), the common cold source heat pump 19 performs The heat is circulated and transported so that the recovery of water in the flue gas can be uniformly planned; the preferred method is that in the step (1), the raw flue gas before wet desulfurization is cooled by the raw flue gas cooling device, The heat carried by the original flue gas is transferred to the cold source heat pump 19; in the step (2), the circulating spray water used in the wet desulfurization treatment flue gas is cooled by the spray water cooling device, and the circulating The heat carried by the spray...

Embodiment 3

[0033] Such as figure 1 As shown, a method and device for recovering water in wet desulfurization flue gas of the present invention, its basic implementation steps and structural settings are the same as those in Example 2, specifically, the following settings are also included:

[0034] The original flue gas cooling device includes a raw flue gas heat exchanger 2 arranged in the original flue 1, and the original flue gas heat exchanger 2 is connected to the cold source heat pump 19 through the cold source heat pump working heat source circulation pipe 18, and the cold source The heat pump working heat source circulation pipe 18 is provided with a cold source heat pump working heat source circulation pump 17; the spray water cooling device includes a cold source heat pump water supply pipe 16 and a cold source heat pump return water pipe 13, and is arranged on the cold source heat pump water supply pipe 16 There is a water supply pump 14, and the cold source heat pump water su...

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Abstract

The invention relates to a method for recycling water from wet desulphurization flue gas and a device thereof. The method comprises the following steps: cooling the original flue gas before wet desulphurization, cooling the flue gas in the wet desulphurization process by adopting a circular water-spraying method, and finally heating the pure flue gas so as to recycle water from the flue gas. The device comprises a wet desulphurization device, an original flue gas cooling device, which is connected to the wet desulfurization device, a water-spraying cooling device, and a pure flue gas heating device. The invention fully utilizes the characteristics of flue gas and the wet desulfurization technology, efficiently combines the water recycling process and flue gas purifying process, has a prominent environmental protection and energy saving effect, fully recycles the water in the flue gas, thus effectively saves the water resource in the wet desulfurization purification technology, effectively solves the contraction between the wet desulfurization technology and the limited water resource in water-deficient areas, greatly reduces the economic cost, and is suitable for promotion and application in the field of wet method flue gas purification.

Description

technical field [0001] The invention relates to the field of wet flue gas purification such as limestone-gypsum method, ammonia method, double alkali method and magnesium method, and in particular to a method and device for recovering water in wet desulfurization flue gas. Background technique [0002] At present, in the field of flue gas purification, wet desulfurization technology is widely used, but its application in water-scarce areas is greatly limited due to its large water consumption. In the wet desulfurization process, 90% of the water consumption is discharged into the atmosphere through the chimney with the net flue gas in the state of saturated water vapor. The accumulation of saturated water vapor carried by the net flue gas comes from the accumulation of the entire flue gas purification process. And the amount of recoverable water is very large, especially the water content in the flue gas at the tail of the lignite boiler is higher, and the amount of recovere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/00
Inventor 王玥
Owner BEIJING ZHONGNENG NUOTAI ENERGY SAVING & ENVIRONMENTAL PROTECTION CO LTD
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