Flue gas purifying and discharge device and method for fire grate type biomass power station boiler

A technology for biomass boilers and power plant boilers, which is applied in the direction of chemical instruments and methods, combined devices, separation methods, etc., and can solve problems such as large amount of flue gas dust, easy coking in combustion, and poor flue gas environment of biomass boilers

Pending Publication Date: 2018-06-26
陕西大秦环境科技有限公司
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Problems solved by technology

[0006] (3) The amount of flue gas dust is very large, and the ash-slag ratio after biomass combustion is (10:0-8:2). Due to the small particle size of the combustion dust and the large specific resistance, the dust removal of biomass-fired boilers is only suitable For bag filter, the bulk

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  • Flue gas purifying and discharge device and method for fire grate type biomass power station boiler

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] like figure 1 As shown, the present invention provides a grate type biomass power plant boiler flue gas purification and discharge device, including: biomass boiler 32, oxidation mixing device 27, desulfurization tower 14, bag filter 23, and chimney 31, wherein, the The biomass boiler 32 is provided with a primary tuyere 30 and a secondary tuyere 1, the outlet of the biomass boiler 32 is connected with the desulfurization tower 14 through the oxidation mixing device 27, and the outlet of the desulfurization tower 14 is connected with the bag filter 23, T...

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Abstract

The invention discloses a flue gas purifying and discharge device and method for a fire grate type biomass power station boiler. The device comprises a biomass boiler, an oxidizing and mixing device,a desulfurization tower, a bag dust remover and a chimney, wherein a primary air hole and a secondary air hole are formed in the biomass boiler; an outlet of the biomass boiler is connected with the desulfurization tower through the oxidizing and mixing device; an outlet of the desulfurization tower is connected with the bag dust remover; a first branch of the outlet of the bag dust remover is connected with the chimney; a second branch is connected with the primary air hole and the secondary air hole of the biomass boiler through a re-circulating fan to form a circulating loop; desulfurization, denitration and dust-removal processes are optimized, so that ultralow emission of pollutants such as biomass boiler flue gas sulfur dioxide, nitric oxide and dust is realized. The device is relatively small in influences on the boiler, flexibly operates according to the load and a practical pollutant condition, is convenient for controlling operation of the whole biomass power plant system, isflexible to operate, and saves water and operation cost.

Description

technical field [0001] The invention relates to the field of power station tail gas discharge, in particular to a grate type biomass power plant boiler flue gas purification and discharge device and method thereof. Background technique [0002] Biomass boilers are boilers that use biomass energy such as crop stalks (corn stalks, sorghum stalks, wheat straw, rice straw, bean stalks, and cotton stalks, etc.), agricultural processing industry waste (rice husks), etc. as fuel. Biomass energy is characterized by renewability, low pollution, wide distribution and abundant total amount. The content of sulfur dioxide and nitrogen oxides in the exhaust gas of biomass boilers is relatively low, but with the improvement of national environmental protection standards for boiler flue gas emissions, biomass boilers have not adapted to the new environmental protection requirements. [0003] Biomass boiler flue gas has the following characteristics: [0004] (1) The temperature in the fur...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/56B01D53/80B01D53/50B01D50/00F23J15/02F23J15/04F23C9/06
CPCB01D53/50B01D53/56B01D53/75B01D53/80F23C9/06F23J15/025F23J15/04B01D2258/0283B01D2251/104B01D50/20
Inventor 李军民王伟李明波张小龙杜媛
Owner 陕西大秦环境科技有限公司
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