Integrated desulfuration and dust removal method for medium and small boiler flue gas

A technology for boiler flue gas, desulfurization and dust removal, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation to achieve the effects of high reactivity, no secondary pollution, and fast absorption.

Inactive Publication Date: 2011-06-08
秦皇岛双轮环保科技股份有限公司
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  • Application Information

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Problems solved by technology

[0020] The technical problem to be solved in the present invention is to overcome the defects of the prior art and provide an integrated desulfurization and dust removal method for small and medium-sized boiler flue gas. Before the regeneration reaction, a crystallization pool is added, crystal seeds are added to induce gypsum crystallization, and supersaturation is avoided. The solution enters the absorption system to prevent scaling and blockage caused by gypsum added to the desulfurization tower for crystallization

Method used

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Embodiment Construction

[0038] After the boiler flue gas is dedusted by the electrostatic precipitator, it enters the desulfurization tower tangentially under the traction of the induced draft fan, and spirally rises under the guidance of the swirl plate in the tower; 2 The solution and the desulfurization liquid composed of the mixture of calcium sulfate and calcium sulfite are in counter-convective contact, and the desulfurization liquid on the swirl plate is atomized to form a good atomization absorption area; the alkaline desulfurization agent in the flue gas and the desulfurization liquid Fully contact reaction in the chemical zone to complete the desulfurization and absorption of flue gas;

[0039] The flue gas after desulfurization passes through the demister plate at the top of the tower, and uses the rotating action of the flue gas itself and the guiding effect of the swirl demister plate to generate a strong centrifugal effect, which throws the droplets in the flue gas to the tower wall, so ...

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Abstract

The invention discloses an integrated desulfuration and dust removal method for medium and small boiler flue gas, which comprises that: after the boiler flue gas is subjected to dust removal through an electric dust remover, the boiler flue gas is tangentially fed into a desulfuration tower under the traction of a draft fan to perform desulfuration reaction, the desulfurized and water mist removed flue gas can be directly fed into a flue and discharged by a chimney; and a mode of circular absorption in the tower is adopted for the desulfuration solution, kettle solution of the desulfuration tower flows into a circulation tank through a pipeline, the solution is first added into a crystallization tank, crystal seeds are added to induce the crystallization of gypsum, the crystallized circulation solution is fed into a regeneration tank for regeneration, the regenerated desulfuration solution is added into a sedimentation tank for sedimentation, and the supernate and the desulfuration solution fed into the crystallization tank are pumped into the desulfuration tower in a certain ratio through a circulating pump and serve as desulfuration solution for the desulfuration reaction.

Description

technical field [0001] The invention relates to a flue gas integrated desulfurization and dust removal method for medium and small boilers. Background technique [0002] The flue gas desulfurization of small and medium-sized coal-fired boilers is an environmental governance project faced by many enterprises. [0003] At present, there are more than 500,000 industrial boilers in my country, 80% of which are small and medium boilers (1t / h ~ 35t / h). According to statistics, among the dust removal equipment installed in these boilers, wet dust removal devices (water film and rinsing, etc.) account for about 25% to 35%. [0004] Due to the shortage of water in northern my country and abundant water sources in the south, the proportion of wet dust removal devices installed in the south is greater than that in the north. These wet dust collectors consume a lot of tap water every year. Taking a 10t / h boiler as an example, the annual consumption of tap water (including water for du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D50/00B01D53/50
Inventor 姜述玉姚殿宝温建孙艳燕李春生
Owner 秦皇岛双轮环保科技股份有限公司
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