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Efficient SCR (selective catalytic reduction) denitrification reactor

A denitrification reactor and reactor technology, applied in chemical instruments and methods, gas treatment, dispersed particle separation, etc., can solve problems affecting flow field distribution, etc.

Pending Publication Date: 2017-05-31
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the processing accuracy of the deflector and whether the installation is accurate will affect the final flow field distribution

Method used

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  • Efficient SCR (selective catalytic reduction) denitrification reactor
  • Efficient SCR (selective catalytic reduction) denitrification reactor
  • Efficient SCR (selective catalytic reduction) denitrification reactor

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0059] Specific embodiments of the present invention are as follows:

[0060] (1) Rectifier parameters

[0061] H1 Range: 300mm~600mm

[0062] H2 range: 100mm ~ 150mm

[0063] H5 range: 100mm ~ 400mm

[0064] H6 range: 75 ~ 150mm

[0065] Flue gas volume = cross-sectional area, that is, the product of H3 and H4 and the cross-sectional gas flow rate. H3 is generally smaller than H4, which is the work of the basic designer of the SCR reactor.

[0066] (2) Reactor parameters

[0067] The gas velocity in the cross-section of the reactor should be controlled below 6m / s.

[0068] The included angle A between the top plate of the reactor and the horizontal direction ranges from 9° to 20°.

[0069] There is no limit to the amount of gas handled.

[0070] (3) Positional relationship between rectifier and reactor

[0071] The apex 4 of the rectifi...

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Abstract

The invention provides an efficient SCR (selective catalytic reduction) denitrification reactor. The efficient SCR denitrification reactor is characterized in that the top of the reactor adopts a pitched-roof structure, that is, an included angle A is formed between a top plate of the reactor and the horizontal direction, and A ranges from 9 degrees to 20 degrees; a rectifier adopts an inclined structure, that is, a front view of the rectifier is in a right trapezoid shape, one leg of the right trapezoid is parallel to the horizontal direction, and an included angle B is formed between the other leg and the horizontal direction and ranges from 0.5 degrees to 3 degrees; the leg parallel to the horizontal direction is below the other leg. With the adoption of the design of the reactor and the rectifier, a gradually expanding channel is formed with a channel in front of a horizontal flue, and a vertex of an upper base of the rectifier coincides with a connection point of the reactor and the horizontal flue. The reactor can meet a technical index requirement (CV value is smaller than 15%) of a flow field without addition of a guide plate at the top of the flue or the reactor.

Description

technical field [0001] The invention relates to an internal structure of an SCR denitration reactor, in particular to a top structure and a rectifier structure of an SCR denitration reactor. Background technique [0002] SCR is an efficient flue gas denitrification technology, which is widely used in the denitrification treatment of boilers, kilns and other industrial facilities that generate a large amount of nitrogen oxides. The denitrification efficiency of SCR technology is affected by many factors, among which the flow field distribution is one of the most important technical indicators. The assessment surface for the uniformity of the flow field distribution is the cross-section at 0.5m upstream of the surface of the first layer of catalyst, and the maximum deviation coefficient (CV) of the flue gas velocity distribution at this section is required to be ≤15%. The definition of CV is: [0003] [0004] in: [0005] average value [0006] Vi: sampled value ...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/90B01D53/56
CPCB01D53/8631B01D53/90B01D2258/0283
Inventor 杨一鸣何洪李坚
Owner BEIJING UNIV OF TECH
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