Spraying ammonia mixing system device for SCR flue gas denitrification project

A mixing system and flue gas technology, applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of high ammonia escape rate, achieve uniform flow, reduce operating costs, and enhance strength

Active Publication Date: 2015-07-22
BEIJING UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the invention is to invent a high-efficiency and low-cost ammonia injection mixing system device for the mainstream SCR technology of flue gas denitrification, and at the same time, it can be used to solve the problem of high ammonia escape rate in current SCR flue gas denitrification projects

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  • Spraying ammonia mixing system device for SCR flue gas denitrification project
  • Spraying ammonia mixing system device for SCR flue gas denitrification project
  • Spraying ammonia mixing system device for SCR flue gas denitrification project

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Embodiment Construction

[0016] The following is a further description of the present invention by taking the SCR flue gas denitration engineering device of a 300MW unit of a certain power plant as an example in conjunction with the figure.

[0017] Such as Figure 5 As shown, the cross section of the flue at the location where the ammonia injection mixing system is installed at the SCR flue gas denitration engineering device of a 350MW unit in a power plant is a rectangle of 2400×10200 (mm). According to the shape and size of the flue cross section, when designing the ammonia injection mixing system , The nozzle spacing is chosen to be 425mm, six groups of ammonia injection mixing units are arranged in the direction of length 10200mm, and three groups of ammonia injection mixing units are arranged in the direction of 2400mm width. There are 18 groups of ammonia injection mixing units, and the total number of nozzles is 144. The size of the connecting nozzle is Φ76×3.5(mm), and each connecting nozzle is ...

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Abstract

The invention relates to a spraying ammonia mixing system device for an SCR (Selective Catalytic Reduction) flue gas denitrification project. The spraying ammonia mixing system device consists of a plurality of groups of spraying ammonia mixing units, wherein the number of the spraying ammonia mixing units is determined by section shape and size at a gas flue position where the spraying ammonia mixing system device is; all the spraying ammonia mixing units are uniformly and symmetrically mounted in a gas flue; input pipes are symmetrically and perpendicularly connected with the middle of communicated type spray pipes through branch pipes; valves are arranged on passageways by which the input pipes are connected with the branch pipes; the communicated type spray pipes adopt continuous closed tubular structures, and through holes for glue gas flow are formed in the communicated type spray pipes and uniformly, perpendicularly and symmetrically formed in the communicated type spray pipes; spray nozzles comprises spouts and spray nozzle walls and are formed in the through holes of the communicated type spray pipes; the spray nozzle walls are hermetically welded with the through holes of the communicated type spray pipes, the tops of the spray nozzle walls are sealed, and the spouts are formed in the spray nozzle walls.

Description

Technical field [0001] The invention relates to an ammonia injection mixing system device used in an SCR (selective catalytic reduction method) flue gas denitration engineering device, and belongs to the technical field of denitration environmental protection equipment. Background technique [0002] With the development of my country's industrialization process, environmental pollution has become increasingly serious. In recent years, there have been continuous haze weather in some parts of our country, and air pollution has seriously affected people's normal work and life. Nitrogen oxide NO x It is the main component of air pollutants, mainly from mobile emission sources, such as automobiles, ships and airplanes, and stationary emission sources, such as power station boilers, industrial boilers, and biomass boilers. The treatment technologies for fixed nitrogen oxide sources mainly include desulfurization and denitrification integrated technology, SCR technology, SNCR technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/56
Inventor 何洪黄庆华宋丽云
Owner BEIJING UNIV OF TECH
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