Issue 21/2015 - The first battle for ultra-low emission technology for active molecules

The integrated removal technology of coal-fired flue gas active molecular oxidation pollutants independently developed by Professor Wang Zhihua's team of Zhejiang University was successfully
applied for the first time in the flue gas treatment project of Hangzhou Zhongce Qingquan carbon black boiler.
A few days ago, the demonstration device successfully passed the 168-hour operation assessment and won
the first battle.

The successful implementation of this project marks that the integrated removal technology of multiple pollutants of coal-fired flue gas active molecules independently developed by Zhejiang University has successfully entered the stage of industrial application, providing a new technical solution
with independent intellectual property rights for the realization of "ultra-low emissions" of industrial boiler flue gas in China.

Since 2000, Wang Zhihua's team, under the leadership of Cen Keyuan, director of the Institute of Thermal Energy of Zhejiang University, has carried out research
on the treatment of various pollutants in coal burning 。 Based on the mechanism research on pulverized coal re-combustion and selective non-catalytic reduction (SNCR), the project team proposed for the first time in the world the new idea of "integrated removal of multiple pollutants of active molecules", that is, the active molecules are used to oxidize NO and HgO in flue gas to soluble NO2 and Hg2+, and the synergistic absorption of SO2, NOx and Hg is realized in combination with lye spraying.
At the same time, active molecules are used to oxidize and degrade organic macromolecules such as benzene, toluene, and dioxin, so as to ensure the integrated and efficient removal of multiple pollutants, and a preliminary technical scheme
is formed.

In April 2015, the new technology solution was first applied and successfully
started in the flue gas treatment project of Hangzhou Zhongce Qingquan carbon black boiler.
Tested by authoritative departments: after adopting new technology, the initial concentration of NOx in boiler flue gas was reduced from 800mg/Nm3 to 10mg/Nm3, and the initial concentration of SO2 was reduced from 1000mg/Nm3 to 15mg/Nm3
.
In addition, the technology can remove multiple contaminants from a single tower, overcoming the disadvantages
of superimposing single-function pollutant treatment facilities in traditional solutions.

(Work)