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Method for synchronously removing sulfur dioxide and fine particles in smoke through electrical charge and mist spray

A technology for fine particles and sulfur dioxide, which is applied in chemical instruments and methods, separation methods, electrostatic separation, etc., can solve the problems of increasing the number and concentration of fine particles, and achieve the effects of improving the degree of mixing, lowering operating costs, and improving capture efficiency.

Inactive Publication Date: 2014-11-26
SHANGHAI SANQING ENVIRONMENTAL PROTECTION TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

Ammonia desulfurization is mainly due to the production of a large number of aerosol particles, resulting in a sharp increase in the concentration of fine particles in the flue gas after desulfurization

Method used

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  • Method for synchronously removing sulfur dioxide and fine particles in smoke through electrical charge and mist spray

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Embodiment Construction

[0019] Such as figure 1 As shown, firstly, the prepared absorbent is placed in the absorption liquid mixing pool (12), and is transported to the spray gun (2) of the desulfurization tower (1) by the slurry pump (11) through the absorption liquid pipeline (10). The high-voltage power supply 8 charges the absorbent, then uses the compressed air storage tank (3) to input air into the spray gun (2) through the high-pressure air pipeline (5), and sprays the absorbent in the form of mist through the spray gun (2) into the desulfurization tower (1). The positively charged adsorption liquid mist reacts with the sulfur dioxide in the flue gas, and captures the fine particles in the flue gas through charge coagulation. The large liquid droplets in the process of condensation will directly fall to the bottom of the absorption tower, while the fine charged liquid droplets will be trapped when passing through the demisting device (6), and fall along the tower wall to the bottom of the a...

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Abstract

The invention relates to a method for synchronously removing sulfur dioxide and fine particles in smoke through electrical charge and mist spray. The method performs pre-charge (positive charge) for absorption liquid through an external electrical charge spray gun, and uses compression molding air for spraying the absorption liquid input in the spray gun into a desulfurization tower in a mist manner; the mist drops of the absorption liquid with the positive charge are reacted with the sulfur dioxide in the smoke; and the fine particles in the smoke are captured through an electrical charge coagulation effect. The large drops in the desulfurization tower directly drop to the bottom of an absorption tower; the small drops are captured when entering a demisting device along with the smoke, and flow to the bottom of the desulfurization tower along the tower wall; and finally, the absorption liquid can be recycled after the regeneration treatment. The synchronous and efficiency removal of the sulfur dioxide and the fine particles in coal-fired flue gas can be realized through the method. Compared with the prior art, the method has such characteristics as high efficiency and low energy consumption.

Description

technical field [0001] The invention relates to a method and a device in the field of coal-burning flue gas purification, which is a method and a device for synchronously removing sulfur dioxide and fine particles in coal-burning flue gas by using charged spray technology. The method can realize synchronous desulfurization and dust removal without the problem of secondary pollution. Background technique [0002] my country is a country that burns coal as its main energy source. The annual coal consumption has exceeded 3.5 billion tons, and the resulting sulfur dioxide and dust pollution are very serious. As one of the areas with the highest fine particulate matter in the world, the pollution of fine particulate matter in my country has attracted great attention from the society. my country's newly revised "Ambient Air Quality Standards" clearly regard fine particulate matter pollution as the object of monitoring and evaluation. Therefore, fine particulate matter will become...

Claims

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Application Information

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IPC IPC(8): B03C3/16B03C3/34B01D53/78B01D53/50
Inventor 周小锋
Owner SHANGHAI SANQING ENVIRONMENTAL PROTECTION TECH