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Ammonia spraying static mixer and dust removal method

A static mixer and static mixing technology, applied in the direction of fluid mixers, chemical instruments and methods, mixers, etc., can solve the problems of back-end equipment blockage, inability to effectively remove dust, etc., reduce production and installation costs, and realize modularization The effect of mass production, reducing the deviation of gas velocity distribution and ammonia concentration distribution

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an ammonia injection static mixer with dust removal function and a dust removal method, so as to overcome the inability of the ammonia injection static mixer in the prior art to effectively remove dust, which leads to catalyst bed channels, ammonia nozzles, and back-end equipment. clogged downside

Method used

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  • Ammonia spraying static mixer and dust removal method
  • Ammonia spraying static mixer and dust removal method
  • Ammonia spraying static mixer and dust removal method

Examples

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Effect test

Embodiment 1

[0048] Such as Figure 1~5 In the device embodiment shown, the ammonia injection static mixer of the present invention is composed of a layer of ammonia injection static mixer, and the angle between the right-angled trapezoidal wing plates (that is, the first wing plate 11A and the second wing plate 11B) and the vertical direction is α is 30°, the included angle β between the right-angled trapezoidal hypotenuse of the first wing plate 11A and the second wing plate 11B and the horizontal direction is 15°, and the top of the first wing plate 11A and the second wing plate 11B are provided with four The opening 11D, the shape of the opening 11D is a rectangle, the opening faces the side of the opposite wing plate and is provided with a deflector 11E, the angle γ between the deflector 11E and the vertical direction is 75°, the wedge-shaped surface at the lower end of the inclined pipe section 12B is in line with the vertical The angle δ between the directions is 15°.

[0049] A ce...

Embodiment 2

[0051] Such as Figure 6 In the device embodiment shown, the ammonia injection static mixer of the present invention is made up of two layers of ammonia injection static mixers, i.e. the first layer of ammonia injection static mixer F1 and the second layer of ammonia injection static mixer F2, the two layers of ammonia injection static mixer The static mixers share the same hollow pipe 12, including a vertical pipe section 12A, an inclined pipe section 12B and a baffle 12C. The ratio of the cross-sectional area of ​​the upper surface of the V-shaped plate 11 of the second layer of ammonia-injected static dust removal mixer to the upper surface cross-sectional area of ​​the V-shaped plate of the first layer of ammonia-injected static dust removal mixer is 1.5:1.

[0052] further as Figure 2-5 As shown, the angle α between the right-angled trapezoidal wing plates (that is, the first wing plate 11A and the second wing plate 11B) and the vertical direction is 45°, and the right-...

Embodiment 3

[0055] Such as Figure 7 In the device embodiment shown, the ammonia injection static mixer of the present invention is made up of three layers of ammonia injection static mixers, namely the first layer of ammonia injection static mixer F1, the second layer of ammonia injection static mixer F2 and the third layer of ammonia injection static mixer. The ammonia static mixer F3 shares the same hollow tube 12 among the three layers of ammonia injection static mixers, including a vertical tube section 12A, an inclined tube section 12B and a baffle 12C. The cross-sectional area ratio of the V-shaped plate 11 upper surface of the second layer of ammonia-sprayed static dedusting mixer to the V-shaped plate of the first-layer ammonia-sprayed static dedusting mixer is 2:1, and the third layer of ammonia-sprayed static dedusting mixer is 2:1. The ratio of the cross-sectional area of ​​the upper surface of the V-shaped plate 11 of the dust removal mixer to the cross-sectional area of ​​th...

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Abstract

The invention discloses an ammonia spraying static mixer and a dust removal method, the mixer has one or more layers and is arranged in a flue, each layer of mixer is composed of a plurality of static mixer units which are arranged side by side, each static mixer unit comprises a V-shaped plate, wherein wing plates on two sides of the V-shaped plate are provided with openings to enable flue gas in the flue to form horizontal collision; and a hollow pipe positioned at the lower part of the V-shaped plate and used for collecting and guiding dust falling after horizontal collision of the discharged flue gas. According to the ammonia spraying static mixer with the dust removal function and the dust removal method, the defect that in the prior art, due to the fact that an ammonia spraying static mixer cannot effectively remove dust, catalyst bed hole channels, ammonia nozzles, rear-end equipment and other parts are blocked can be effectively overcome.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to an ammonia injection static mixer and a dust removal method. Background technique [0002] Among the existing flue gas denitrification methods, the most widely used at home and abroad is the selective catalytic reduction (SCR) technology. The main principle of the SCR technology is to spray the reducing agent ammonia into the flue gas at 280 ° C ~ 420 ° C and mix it evenly. Under the action of the catalyst, the NH 3 NO in flue gas x Reduce to non-toxic, non-polluting nitrogen and water, so as to realize the removal of NO from mixed gas x the goal of. [0003] Flue gas denitrification efficiency and NH 3 Escape rate is the two core performance indicators of SCR denitrification technology. Studies have shown that the flow field uniformity of the mixed gas on the cross section of the SCR reactor is the key factor to ensure the complete denitrification reaction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F5/06B01D53/56B01D53/90B01D45/08B01D45/18F23J15/00F23J15/02
CPCB01D53/8631B01D53/90B01D45/08B01D45/18F23J15/003F23J15/022B01D2251/2062B01D2258/0283B01F25/4231Y02A50/20
Inventor 李磊金平李欣韩天竹王明星陈益民高峰
Owner CHINA PETROLEUM & CHEM CORP
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