Swirling inlet type electrostatic spraying wet flue gas desulphurization dedusting apparatus

A technology of wet flue gas desulfurization and electrostatic spraying, applied in the direction of electrostatic effect separation, separation methods, chemical instruments and methods, etc., can solve the problems of uneven water consumption concentration, enhance droplet absorption, etc., to increase the effective time of action, The effect of saving water resources and protecting the natural environment

Inactive Publication Date: 2011-09-28
JIANGSU UNIV
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Problems solved by technology

It can overcome the shortcomings of high liquid-to-gas ratio, huge water consumption and uneven concentration of alkaline droplets during transportation in the wet flue g...

Method used

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  • Swirling inlet type electrostatic spraying wet flue gas desulphurization dedusting apparatus
  • Swirling inlet type electrostatic spraying wet flue gas desulphurization dedusting apparatus
  • Swirling inlet type electrostatic spraying wet flue gas desulphurization dedusting apparatus

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Embodiment Construction

[0014] When the patent of the present invention is in use, the exhaust gas (flue gas and dust) produced by coal combustion passes through the exhaust gas inlet 11, passes through the swirl baffle 13, and the swirl baffle can be adjusted according to the angle, rotates and flows into the spray reaction tower 1, and passes through the swirl baffle 13. The slurry inlet 6 flows through the flow control valve 5, and is sprayed out from the nozzle 3, and the mist droplets charged by the ring-shaped and needle-shaped charging electrode 2 are used to remove SO 2 Effect with dust. After the droplets are sprayed through the pressure nozzle, they will generate secondary atomization under the action of the charged electrode to form finer droplets, which will chemically react with the droplets under the action of a high-voltage electrostatic field to remove SO 2 , and remove the dust in the exhaust gas. When the ring and needle electrodes are used for charging, the charging effect of the ...

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Abstract

The invention relates to a swirling inlet type electrostatic spraying wet flue gas desulphurization dedusting apparatus for the purpose of purifying exhaust gas, comprising a spray reaction tower, an electrostatic spraying device, a demister, a flow controller, a control signal sensor, an induced draught fan, an exhaust gas inlet and a waste material inlet. In the invention, the method of electrostatic spraying, in which annular electrodes and acicular electrodes are combined to carry out induction charging and corona charging, further refines droplets of a slurry and enables high pressure polarization of charged and non-charged droplets, thereby generating an additional driving force of mass transfer; air enters through swirling inlets, thereby increasing the contact time between flue gas and droplets; a concentration on-line monitoring device is employed to automatically adjust static voltage and slurry flow and to guarantee that desulphurization efficiency is maintained in a certain scope, thereby meeting discharge standard as well as enhancing economic benefits. The flue gas desulphurization dedusting apparatus provided in the invention has high efficiency, a reduced liquid-gas ratio, low operation cost and a moderate price, and is ideal environmental protection equipment.

Description

technical field [0001] The invention relates to a flue gas desulfurization and dust removal device. Background technique [0002] Wet calcium flue gas desulfurization technology began in 1909, and the world's first lime flue gas desulfurization system was built in 1931. Since the 1960s, the United States, Japan, and Germany have successively carried out large-scale research work, and gradually implemented and improved flue gas desulfurization technology (FGD), of which wet flue gas desulfurization technology (WFGD) accounts for more than 85%. my country's flue gas desulfurization technology started relatively late, mainly by introducing more mature FGD technology from abroad, and gradually absorbing and realizing the localization of FGD technology. From a technical point of view, coal desulfurization can be controlled in three ways: pre-combustion, during combustion and post-combustion. The comprehensive application of desulfurization technologies in the above three stages ...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/80B03C3/017
Inventor 王贞涛顾利平罗惕乾
Owner JIANGSU UNIV
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