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Coke Oven Flue Gas Denitrification Industrial Units Using DICP Low-temperature DeNOx Technology is Fully Operational
  English.dicp.cas.cn    Posted:2016-07-14    From:DNL0901

Recently, three low-temperature DeNOx industrial units have been successfully carried out in Jiangsu Yizhou Coking Co., Ltd. for removal of NOx from 1#, 2# and 4# coke oven flue gas. These units were all loaded with high-efficiency low-temperature DeNOx catalysts developed by Prof. WANG Shudong’s Group from Dalian Institute of Chemical Physics (DICP).

The commercialization promotion of the coke oven flue gas denitrification was launched last year. WANG’s group joined with Jiangsu WOTE Environmental Protection Equipment Engineering Co. Ltd and Jiangsu Yizhou Coking Co., Ltd to establish a low-temperature DeNOx industrial demonstration unit for reduction of NOx emissions from the 3# coke oven. This unit was put into operation successfully on 27 November 2015.

According to the on-line Continuous Emission Monitoring System (CEMS) monitoring data, this efficient Selective Catalytic Reduction (SCR) catalyst showed a very high and stable NOx reduction efficiency with 90%~95%. The concentration of NOx in effluent maintained less than 70 mg/m3. So far, the unit has been running for more than 7 months and the catalysts show good stability and sulfur-resistance.

Based on the results of the industrial demonstration unit, WANG’s group optimized the proprietary catalyst and reactor design. Not only the DeNOx efficiency is improved, but also the pressure drop of the reactor is greatly reduced.

The Coke Oven Flue Gas Denitrification Industrial Units Using DICP Low-temperature DeNOx Technology (Image by CHENG Hao)

This year, Jiangsu Yizhou Coking Co., Ltd continued to collaborate with DICP to improve the technology for the denitration construction of the remaining three coke ovens. From May to June, these three industrial units were debugged and run. The results showed that all technical indexes of the DeNOx system fulfilled the design demand. This efficient SCR catalyst showed a very high and stable NOx reduction efficiency with 98%~99% during running. The concentration of NOx in effluent also reached less than 20 mg/m3, which is far below the emission standard of NOx for coking chemical industry. (Text and Image by CHENG Hao)

Dr. LU Xinyi

Dalian Institute of Chemical Physics, Chinese Academy of Sciences,

457 Zhongshan Road, Dalian, 116023, China,

Tel: 86-411-84379201,

E-mail: luxinyi@dicp.ac.cn 

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