Flue gas cleaning device and method for circulating fluidized bed through semi-dry method

A circulating fluidized bed and flue gas purification technology, applied in chemical instruments and methods, combined devices, separation methods, etc., can solve the problems of inability to accurately control the flue gas volume of the desulfurization tower, low degree of automation, and poor desulfurization effect. The effect of improving utilization rate and desulfurization efficiency, low production cost and smooth system layout

Active Publication Date: 2014-05-14
LAN TIAN ENVIRONMENTAL ENGINEERING CO LTD
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Problems solved by technology

The conventional desulfurization method has simple steps, poor desulfurization effect, single function, low degree of automation, and cannot accurately control the flue gas volume in the desulfurization tower

Method used

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  • Flue gas cleaning device and method for circulating fluidized bed through semi-dry method
  • Flue gas cleaning device and method for circulating fluidized bed through semi-dry method
  • Flue gas cleaning device and method for circulating fluidized bed through semi-dry method

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Embodiment Construction

[0028] Example. Circulating fluidized bed semi-dry flue gas purification method, the flue gas from the boiler room is desulfurized by the desulfurization tower, pre-dusted by the pre-dust removal device, and dusted by the bag filter, and then discharged to the chimney; the desulfurized ash collected after the pre-dust removal and dust removal Return to the desulfurization tower through the air chute to continue desulfurization and discharge to the ash storage. The desulfurization method of the desulfurization tower is to use a weighing sensor to measure the absorbent and transport it to the Venturi inlet of the desulfurization tower through the jet pump by the Roots blower to mix with the flue gas, and then transmit it to the diffusion section from the Venturi, and then from the diffusion section. The desulfurization nozzle and the reserved nozzle alternately spray water mist for desulfurization.

[0029] The desulfurization nozzle and reserved nozzle are arranged opposite to...

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Abstract

The invention discloses a flue gas cleaning device and a method for a circulating fluidized bed through a semi-dry method. The method comprises the following steps of: sequentially desulfurizing flue gas come from a boiler room, pre-dedusting the flue gas through a pre-dedusting device, and dedusting the flue gas through a bag-type deduster, and then discharging the flue gas into a chimney; and respectively returning the collected desulfurized ash after being subjected to pre-dedusting and dedusting to a desulfurizing tower through an air chute so as to be desulfurized, and discharging the ash out of an ash silo. According to the device and the method, the desulfuration reaction can be accelerated, the desulfuration effect is improved, the flue gas capacity in the desulfurizing tower can be controlled in real time, the normal fluidization in the desulfurizing tower is maintained, and the service life of the flue gas cleaning device is prolonged.

Description

technical field [0001] The invention relates to a desulfurization method and device, in particular to a circulating fluidized bed semi-dry flue gas purification method and device. Background technique [0002] Circulating fluidized bed semi-dry desulfurization is a desulfurization technology for flue gas desulfurization at the tail of the boiler. Boiler flue gas enters from the bottom of the desulfurization tower, and the air flow is integrated by the Venturi before entering the bed. The desulfurizer and an appropriate amount of atomized water are sprayed into the bed near the Venturi outlet. The sulfide in the reaction reacts to form desulfurization. The conventional desulfurization method has simple steps, poor desulfurization effect, single function, low degree of automation, and cannot accurately control the flue gas volume in the desulfurization tower. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a circ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/18B01D50/00
Inventor 孙琦明毛庚仁范祥子应隆飚谢开光
Owner LAN TIAN ENVIRONMENTAL ENGINEERING CO LTD
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