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1. (WO2017032231) EXHAUST GAS TREATMENT APPARATUS

Pub. No.:    WO/2017/032231    International Application No.:    PCT/CN2016/095266
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Tue Aug 16 01:59:59 CEST 2016
IPC: F01N 3/28
Applicants: TENNECO (SUZHOU) EMISSION SYSTEM CO., LTD.
天纳克(苏州)排放系统有限公司
Inventors: YIN, Lei
殷雷
CAO, Gang
曹刚
WANG, Ping
王平
Title: EXHAUST GAS TREATMENT APPARATUS
Abstract:
An exhaust gas treatment apparatus comprises a housing (21), several partition boards (22), a mixing apparatus (4) disposed in the housing (21), and a tail gas treatment module (31). The housing (21) comprises a first cavity (211), a second cavity (212), and a third cavity (213). The mixing apparatus (4) comprises a mixing tube (41) and a flow guiding cover (42) arranged on the periphery of the mixing tube (41) in a sleeving mode. One end of the mixing tube (41) comprises several fins (411) disposed in the first cavity and distributed in the circumferential direction, so that rotational flow can be formed when exhaust gas enters the mixing tube (41) along the fins (411). The flow guiding cover (42) is arranged at the other end of the mixing tube (41) in the sleeving mode, and at least part of the mixing tube (41) is inserted into the flow guiding cover (42). The flow guiding cover comprises an opening portion (421) communicated with the second cavity, and the opening direction of the opening portion (421) is opposite to the opening direction of the other end of the mixing tube (41), so as to change the gas flow direction. By means of the arrangement, evaporation distance and time of urea are increased, and the gas flow mixing uniformity is improved.