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A channel type mixer device for efficient SNCR denitration of flue gas of a pulverized coal boiler

A pulverized coal boiler and mixer technology, which is applied in gas treatment, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as low out-of-stock efficiency, and achieve the effects of extending service life, good economic benefits, and promoting interaction.

Pending Publication Date: 2019-07-05
HUANENG POWER INTERNATIONAL +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a trough mixer device that realizes efficient SNCR denitrification of pulverized coal boiler flue gas, which solves the problem that existing selective non-catalytic reduction denitrification technology is applied to pulverized coal boiler flue gas denitrification, and there is an out-of-stock efficiency low problem

Method used

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  • A channel type mixer device for efficient SNCR denitration of flue gas of a pulverized coal boiler
  • A channel type mixer device for efficient SNCR denitration of flue gas of a pulverized coal boiler
  • A channel type mixer device for efficient SNCR denitration of flue gas of a pulverized coal boiler

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Embodiment Construction

[0023] The present invention will be described in further detail below with reference to the accompanying drawings.

[0024] like figure 1 and figure 2 As shown, the present invention provides a trough mixer device for realizing high-efficiency SNCR denitrification of pulverized coal boiler flue gas, including furnace outlet flue 1, first screen heat exchanger 2, SNCR pneumatic spray gun 3, trough mixer 4, the second screen heat exchanger 6 and the downstream flue 5, wherein the first screen heat exchanger 2, the SNCR pneumatic spray gun 3, the trough mixer 4 and the second screen heat exchanger 6 are installed in sequence In the inner cavity of the furnace outlet flue 1 of the pulverized coal boiler.

[0025] like image 3 As shown, the basic unit of the trough mixer 4 is the channel steel 6, the material of the channel steel 6 is 310S stainless steel, which can use standard channel steel parts or be customized according to the optimized simulation data, and its key dimen...

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Abstract

A channel type mixer device for efficient SNCR denitration of flue gas of a pulverized coal boiler is provided. The device includes channel type mixers arranged between a hearth outlet flue and a downstream flue. The channel type mixers comprise at least two layers of channel type mixer main bodies each of which includes a plurality of pieces of equally spaced channel steel. The device achieves ahigh SNCR denitration efficiency, thus greatly reducing the NOx concentration before pulverized coal boiler SCR equipment, facilitating reduction in dosage of an SCR catalyst, prolonging service lifetime of the catalyst, reducing the cost of catalyst replacement and treatment, and producing good economic benefit.

Description

technical field [0001] The invention belongs to the technical field of environmental protection of coal-fired boilers, and particularly relates to a trough mixer device for realizing high-efficiency SNCR denitration of flue gas of pulverized coal boilers. Background technique [0002] With the increasingly prominent environmental problems, the national environmental protection policy has become more and more strict. The "Coal Power Energy Saving and Emission Reduction Upgrade and Transformation Action Plan 2014-2020" promulgated in 2014 requires that the NOx emission concentration of coal-fired units must be lower than 50mg / Nm 3 . Selective non-catalytic reduction SNCR denitrification technology, as the most widely used flue gas denitration technology after SCR, has been widely used in circulating fluidized bed CFB. [0003] In order to achieve high efficiency of SNCR denitrification, conditions such as suitable flue gas temperature window, sufficient mixing of flue gas and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/78B01D53/56B01D2258/0283
Inventor 林伟荣时正海张继瑞王海涛高洪培肖平
Owner HUANENG POWER INTERNATIONAL
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