Unlock instant, AI-driven research and patent intelligence for your innovation.

Ammonia spraying structure and reactor

A nozzle and flue gas technology, applied in the field of flue gas denitrification, can solve the problems of small effective cross-section and large cross-sectional area, and achieve the effects of increasing effective cross-section, optimizing flow field, and reducing proportion

Pending Publication Date: 2021-06-01
CHINA HUADIAN ENG +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the ammonia injection structure occupies a large cross-sectional area of ​​the flue in the prior art, resulting in a small effective cross-section through which the flue gas can pass, thereby providing a cross-sectional area occupied by the flue. Ammonia injection structure and reactor with small area

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ammonia spraying structure and reactor
  • Ammonia spraying structure and reactor
  • Ammonia spraying structure and reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1 to Figure 4 As shown, an ammonia injection structure 1 is provided in this embodiment, including an ammonia injection pipe 11, a plurality of nozzles 12, and a plurality of protective plates 13. The ammonia injection pipe 11 includes two arc-shaped shells 111 spliced ​​with each other. The two arc-shaped shells 111 are smoothly transitioned at the joint, and the joint plane where the joint of the two arc-shaped shells 111 is located is parallel to the flow direction of the flue gas; The farthest extension distance is greater than the furthest extension distance of the ammonia injection pipe 11 in the direction perpendicular to the flue gas flow direction; the ammonia injection pipe 11 includes injection inlets and multiple injection outlets; multiple nozzles 12 are tubular structures, One end communicates with the injection outlet, and the other end extends along the direction of flue gas flow; multiple protective plates 13 are connected to the ammonia...

Embodiment 2

[0060] In this example, if Figure 5 As shown, a reactor 2 is provided, including an inlet flue 3 and a plurality of the above-mentioned ammonia injection structures 1 , and a plurality of the ammonia injection structures 1 are distributed in the inlet flue 3 . A deflector 4 is arranged inside the inlet flue 3 . Preferably, a plurality of ammonia injection structures 1 are divided into at least two groups along the flue gas flow direction, and each group of ammonia injection structures 1 is evenly distributed on a plane perpendicular to the flue gas flow direction, and two adjacent groups of ammonia injection structures 1 staggered in the direction of flow.

[0061] The ammonia injection structure 1 includes an ammonia injection pipe 11, a plurality of nozzles 12 and a plurality of protective plates 13. The ammonia injection pipe 11 includes two arc-shaped shells 111 spliced ​​with each other, and the two arc-shaped shells 111 are spliced ​​together. smooth transition, the s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an ammonia spraying structure and a reactor. The ammonia spraying structure comprises an ammonia spraying pipe, a plurality of nozzles and a plurality of protection plates, the ammonia spraying pipe comprises two arc-shaped shells which are spliced with each other, the two arc-shaped shells are in smooth transition at the splicing position, and the splicing face where the splicing position of the two arc-shaped shells is located is parallel to the flue gas flowing direction; the farthest extension distance of the ammonia spraying pipe (11) in the flue gas flowing direction is greater than the farthest extension distance of the ammonia spraying pipe (11) in the direction vertical to the flue gas flowing direction; the ammonia spraying pipe comprises a spraying inlet and a plurality of spraying outlets; the nozzles are of tubular structures, one ends of the nozzles communicate with the spraying outlets, and the other ends of the nozzles extend in the smoke flowing direction. The plurality of protection plates are connected to the ammonia spraying pipe, and each protection plate is matched with one nozzle and suitable for preventing the nozzles from being blocked. Compared with a traditional ammonia spraying structure, the ammonia spraying structure occupies a small cross sectional area of the flue.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to an ammonia injection structure and a reactor. Background technique [0002] At present, the power plant is undergoing a new round of ultra-low emission transformation projects, which involves the transformation and replacement of a large number of flue gas denitrification devices. In the modified or newly built denitrification reactor, multiple ammonia injection structures are usually installed in the vertical section of the reactor to inject ammonia gas, and the injected ammonia gas reacts with flue gas in the reactor to denitrify nitrogen oxides. The ammonia injection structure is generally made of circular steel pipes, and there are multiple injection ports crossed on the circular steel pipes. The nozzles are welded at different angles at each injection port, and the ammonia gas is sprayed at different angles through the nozzles. [0003] Multiple ammonia inj...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/76B01D53/56
CPCB01D53/56B01D53/76B01D2251/2062B01D2258/0283
Inventor 夏怀鹏白永锋吴冲王凯亮汪洋李伟
Owner CHINA HUADIAN ENG