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Efficient denitration ammonia spraying mixer

A mixing device and denitrification technology, applied in mixers, fluid mixers, dispersed particle separation, etc., can solve problems such as flue gas uniformity distribution deviation, reduce mixing distance, improve flue gas distribution uniformity, and avoid death Effects of Zones and Dead Zones

Active Publication Date: 2018-01-16
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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Problems solved by technology

[0005] The purpose of the present invention is to: propose a high-efficiency denitrification ammonia injection mixing device, solve the problem of uniform distribution of denitrification flue gas through advanced mixing technology, meet the current ultra-low emission requirements for flue gas uniformity distribution deviation, and improve the reducing agent NH 3 utilization rate, improve denitrification efficiency, and ultimately achieve ultra-low NOx emissions

Method used

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Embodiment Construction

[0039] The following non-limiting examples illustrate the invention.

[0040] refer to Figures 1 to 11 shown, where Figure 9The left and right direction in the paper is the flue width direction, the up and down direction is the flue depth direction, and the vertical direction is the flue length direction; similarly, Figure 10 The left and right direction in the paper surface is the flue width direction, the up and down direction is the flue length direction, and the vertical paper direction is the flue depth direction.

[0041] refer to Figures 9 to 11 As shown, a high-efficiency denitrification ammonia injection mixing device includes ammonia injection nozzle 13, and mixing unit A1 and mixing unit B2 in a long row structure. The lengths of mixing unit A1 and mixing unit B2 all extend along the flue depth direction, and mixing The unit A1 and the mixing unit B2 are installed in rows at intervals along the width direction of the flue and cover the entire flue section uni...

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Abstract

The invention discloses an efficient denitration ammonia spraying mixer, belonging to the technical field of environmental protection. The mixer comprises an ammonia spraying nozzle, and a mixing unitA and a mixing unit B which have a long-row structure, the lengths of both the mixing unit A and the mixing unit B stretch along the depth direction of a flue, the mixing unit A and the mixing unit Bare crosswise arranged at intervals along the width direction of the flue via forming a row and uniformly cover the cross section of the whole flue, and the mixing unit A and the mixing unit B, whichare adjacent to each other, are symmetrical in the width direction of the flue; the mixing unit A is formed by a single row of blades a and a single row of blades b through enabling sawtooth structures to oppositely cross, clasp and assemble, thereby forming an arch-shaped gallery structure. The mixer is used for solving the problem of uniform distribution of denitrated smoke through advanced mixing technology, and meets the requirement of current ultralow emission on the uniform distribution deviation of smoke, the utilization rate of a reducing agent NH3 and the denitration efficiency are improved, and the ultralow emission of NOx is finally realized.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to SCR denitrification of boiler flue gas. Background technique [0002] The SCR denitrification device for coal-fired flue gas in power plants is an important technical equipment for thermal power plants to control NOx emissions. As the country pays more and more attention to environmental protection, strict environmental protection policies have been introduced one after another. Higher requirements. High-efficiency SCR denitrification must rely on more advanced ammonia injection mixing technology, by improving the uniformity of flue gas mixing, the NH in the flue gas 3 / NOx molar ratio distribution deviation is controlled to the minimum to improve SCR denitrification efficiency and meet the requirements of ultra-low emissions. [0003] The ammonia injection mixing technology of nozzle + static mixer has better mixing performance than the multi-nozzle (without m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F5/20B01F5/06B01D53/90B01D53/56
CPCY02A50/20
Inventor 李小勤张定海温永凯金黄
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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