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Deep purification method and device of flue gas after wet-process desulfurization

A technology for deep purification and wet desulfurization of flue gas, which is applied in chemical instruments and methods, combined devices, separation methods, etc. low cost effect

Active Publication Date: 2016-06-08
潍坊天洁环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is to provide a device with high desulfurization and dust removal efficiency and low flue gas emission humidity, which can realize atmospheric humidi

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  • Deep purification method and device of flue gas after wet-process desulfurization

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with specific embodiments. In the following detailed description, certain exemplary embodiments of the invention are described by way of illustration only. Needless to say, those skilled in the art would realize that the described embodiments can be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the following description is illustrative in nature and not intended to limit the scope of the claims.

[0029] like figure 1 and figure 2 As shown, the method for deep purification of flue gas after wet desulfurization includes the following steps:

[0030] Step 1. Preliminary dust removal of flue gas: flue gas containing sulfur and dust first enters the primary dust collector (electrostatic precipitator or bag filter can be used), is captured and filtered, then falls into the ash hopper, and is discharged from the discharge valve ...

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Abstract

The invention discloses a deep purification method and device of flue gas after wet-process desulfurization. The method comprises the following steps: step 1, deep desulfurization and dehumidification of the flue gas: enabling the flue gas subjected to wet-process desulfurization treatment to enter a desulfurization and dehumidification device and sufficiently mixing the flue gas with sprayed calcium oxide dry powder, wherein moisture in the flue gas is absorbed by the calcium oxide to form calcium hydroxide, residual sulfur dioxide in the flue gas is reacted with the calcium hydroxide to be removed, and gypsum components carried in the flue gas are dried by the calcium oxide to form gypsum powder; step 2, final dust removal of the flue gas: enabling the flue gas subjected to the deep desulfurization and dehumidification to enter a final-grade dust remover, and filtering and removing the dust of the flue gas to form clean and dry gas; and finally, discharging the gas, and filtering and collecting the dust formed in the deep desulfurization and dehumidification process through the final-grade dust remover. The method disclosed by the invention is high in desulfurization and dehumidification, and dust removal efficiency, and can meet pollutant emission standards; the flue gas discharging humidity is low, the flue gas can be discharged without heating, and atmospheric environment humidity emission can be realized; and the investment on equipment is less and the operation cost is low.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a method and device for deep purification of flue gas after wet desulfurization, which are applied in the fields of building materials, metallurgy, chemical industry, environmental protection and the like. Background technique [0002] my country's cement kiln head flue gas treatment, steelmaking blast furnace flue gas treatment, non-ferrous metal smelting furnace flue gas treatment, oil refinery flue gas treatment, boiler flue gas treatment, etc., generally use "(static / cloth bag) dust removal—(limestone / lime— Gypsum) wet desulfurization” desulfurization and dust removal process, but with the increasingly serious phenomenon of smog and haze, the requirements for environmental protection are getting higher and higher. [0003] Coal-fired power plants have always been the focus of national environmental governance. The newly released pollutant discharge standards put for...

Claims

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Application Information

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IPC IPC(8): B01D53/83B01D53/75B01D53/78B01D53/80B01D53/50B01D50/00B01D46/02
CPCB01D46/023B01D50/00B01D53/50B01D53/502B01D53/75B01D53/78B01D53/80B01D53/83B01D2251/304B01D2251/404B01D2257/302B01D2258/0283B01D2259/124B01D2259/126B01D2259/128
Inventor 李见成
Owner 潍坊天洁环保科技有限公司
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