Title:
REDUCTANT MULTI-POSITION LAYERED INJECTION STRUCTURE FOR SHIP DENITRATION
Document Type and Number:
WIPO Patent Application WO/2023/015889
Kind Code:
A1
Abstract:
A reductant multi-position layered injection structure for ship denitration, comprising two stages of injection structures, a first-stage injection structure containing one injection unit that is provided in front of a mixer (4), and a second-stage injection structure containing at least one injection unit that is provided in a reactor (3); the injection units of the second-stage injection structure is provided in front of a catalyst bed layer (2), and the injection units of the second-stage injection structure is the same as the injection unit structure of the first-stage injection structure and are provided with a reductant supply main pipe (11); and at least three uniformly arranged injection branch pipes (12) are connected on the reductant supply main pipe (11), wherein an outflow direction of a middle portion injection branch pipe (12) is opposite to an exhaust direction of exhaust gas, injection branch pipes (12) at two ends are respectively offset by 45° to two sides of the corresponding reductant supply main pipe (11), and the injection branch pipes (12) are provided with a nozzle. The structure can improve the mixing uniformity of a reductant and exhaust gas and reduce the escape amount of the reductant, allowing the reductant to fully make contact with a catalyst, thereby improving the denitration effect.
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Inventors:
GUO MINGYU (CN)
LIU BOQUN (CN)
CUI SHAOPING (CN)
DONG SHIPEI (CN)
ZHAO YINGJIE (CN)
YE WEI (CN)
ZHAO JUNJIE (CN)
LI SHINA (CN)
SHANG HAO (CN)
LI ZHENDONG (CN)
LIU BOQUN (CN)
CUI SHAOPING (CN)
DONG SHIPEI (CN)
ZHAO YINGJIE (CN)
YE WEI (CN)
ZHAO JUNJIE (CN)
LI SHINA (CN)
SHANG HAO (CN)
LI ZHENDONG (CN)
Application Number:
PCT/CN2022/081875
Publication Date:
February 16, 2023
Filing Date:
March 20, 2022
Export Citation:
Assignee:
TIANJIN RESEARCH INSTITUTE FOR WATER TRANSP (CN)
International Classes:
B01D53/56; B01D53/90; B01D53/94; B05B7/04
Domestic Patent References:
| WO2012050202A1 | 2012-04-19 |
Foreign References:
| CN215388740U | 2022-01-04 | |||
| CN109647193A | 2019-04-19 | |||
| CN206715693U | 2017-12-08 | |||
| CN206064164U | 2017-04-05 | |||
| CN211274230U | 2020-08-18 | |||
| CN110624411A | 2019-12-31 | |||
| CN204073851U | 2015-01-07 |
Attorney, Agent or Firm:
TIANJIN DINGHE PATENT &TRADEMARK AGENCY CO., INC. (CN)
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