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Selectivelly-desulfurized dense-phase tower drier

A selective, non-desulfurization technology, applied in the field of sintered pellets, which can solve the problems of complex configuration of auxiliary equipment, reduced flue gas temperature and condensation, and large space occupation, so as to reduce energy consumption, save investment and space, and save operating costs. Effect

Active Publication Date: 2008-10-15
UNIV OF SCI & TECH BEIJING +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a selective dense phase dry tower desulfurization device, which solves the problem that the tower body is too large when the dense phase dry tower desulfurization device is applied to sintering flue gas desulfurization, and the bag filter, induced draft fan, flue and other devices occupy a large space. The configuration of related auxiliary equipment is complex, and the temperature of flue gas after desulfurization decreases, condensation and corrosion of the chimney, etc.

Method used

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Embodiment Construction

[0016] Fig. 1 is a kind of specific embodiment of the present invention. The flue gas produced by sintering machine 1 is divided into two parts, containing SO 2 The part with higher concentration enters the large flue 4 of the desulfurization system through the air collecting hopper 2 under the suction of the desulfurization system exhaust fan 6, and contains SO 2 The part with lower concentration enters the non-desulfurization large flue 10 through the air collecting hopper 2 under the suction effect of the non-desulfurization exhaust fan 12 . A flue flapper valve 3 is installed on the flue of the desulfurization system I and non-desulfurization system II, so that the flue gas can be switched between the desulfurization system I and the non-desulfurization system II to prepare for SO in the flue gas. 2 change in concentration. The desulfurized flue gas enters the desulfurization system electrostatic precipitator 5 through the large flue 4 of the desulfurization system, and ...

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Abstract

A closely coherent tower system for selective desulfurizing is composed of a desulfurizing system A and a non-desulfurizing system B, which serve a single sintering motion at same time. Said desulfurizing system A consists of wind gathering hopper, flue valve, flue, electric duster, exhaust blower, closely coherent tower, cloth-bag duster and boosting blower. Said non-desulfurizing system B comprises flue, electric duster and exhaust blower.

Description

technical field [0001] The invention belongs to the technical field of sintered pellets, in particular to a dense phase dry tower device for selective desulfurization. Background technique [0002] Dense-phase dry tower desulfurization system includes dense-phase tower, humidifier, dust collector, silo, elevator and conveyor and other equipment. The main principle of flue gas desulfurization is to use dry powder calcium-based desulfurizer, and add a large amount of circulating ash removed by the bag filter to the humidifier for humidification and digestion. The circulating ash enters the tower from the upper inlet of the dense phase tower. , to react with the sulfur dioxide-containing flue gas entering from the upper part of the tower. There is a stirrer in the reaction tower, which not only overcomes the wall sticking problem but also enhances the mass transfer, so that the desulfurization rate reaches 90%. The final desulfurization by-products are exported from the ash b...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/50
Inventor 宋存义杨天钧陈凯华左海滨
Owner UNIV OF SCI & TECH BEIJING
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