Title:
INTEGRATED PURIFICATION METHOD AND SYSTEM FOR INDUSTRIAL WASTE GAS CONTAINING CYANIDES, HYDROCARBONS AND NOX
Document Type and Number:
WIPO Patent Application WO/2017/121022
Kind Code:
A1
Abstract:
An integrated purification method and an integrated purification system for an industrial waste gas containing cyanides, hydrocarbons and NOx. Said method comprises the steps of: 1) a tail gas containing pollutants of cyanides, hydrocarbons and nitrogen oxides (NOx) being at first treated by means of a gas-liquid separation device (1) to separate a free liquid, and then mixed with air blown by an air blower (201, 202), and preheated by means of a heating unit; 2) the mixture entering into a selective catalytic combustion (SCC) reactor (5) for a selective catalytic combustion reaction to convert harmful substances into CO2, H2O and N2, the catalyzing being carried out in two stages: in the anterior stage, a supported molecular sieve catalyst is used for catalyzing, and in the posterior stage, a supported noble metal catalyst is used for catalyzing; 3) after the gas out from the SCC reactor (5) entering the heating unit for heat recovery, the purified tail gas being directly discharged through a chimney (6). Said system comprises a gas-liquid separation device (1), a heating unit and a selective catalytic combustion reactor (5), a gas outlet of the gas-liquid separation device (1) being connected to the selective catalytic combustion reactor (5) by means of the heating unit, and a tail gas outlet of the selective catalytic combustion reactor (5) being connected to a chimney (6) by means of the heating unit.
Inventors:
CHEN BIAOHUA (CN)
ZHANG RUNDUO (CN)
ZHANG JIE (CN)
SHI DONGJUN (CN)
LI YINGXIA (CN)
ZHANG RUNDUO (CN)
ZHANG JIE (CN)
SHI DONGJUN (CN)
LI YINGXIA (CN)
Application Number:
PCT/CN2016/075602
Publication Date:
July 20, 2017
Filing Date:
March 04, 2016
Export Citation:
Assignee:
UNIV BEIJING CHEMICAL TECH (CN)
International Classes:
B01D53/56; B01D53/86; B01D53/72; B01J29/42; B01J29/46; B01J35/04; C07C255/08
Foreign References:
| CN1903415A | 2007-01-31 | |||
| CN102233231A | 2011-11-09 | |||
| CN101362051A | 2009-02-11 | |||
| US5316991A | 1994-05-31 |
Other References:
TETSUYA NANBA: "Active sites of Cu-ZSM-5 for the decomposition of acrylonitrile", APPLIED CATALYSIS B: ENVIRONMENTAL., vol. 61, no. 2005, 20 July 2005 (2005-07-20) - 9 November 2005 (2005-11-09), pages 288 - 296, XP027813687, ISSN: 0926-3373
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
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