Issue 47/2012 - Pilot test of integrated multi-pollutant removal technology completed

Integrated multi-pollutant removal technology completed pilot test

The carbon-based catalyst dry integrated removal of multiple pollutants from flue gas mobile bed technology, independently developed by the State Key Laboratory of Coal Conversion of Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, has recently completed the pilot test verification
of 5000 cubic meters / hour flue gas in Jiangsu Hehai Group Industrial Park.
This marks that the mobile bed technology and technology of integrated flue gas drying to remove a variety of pollutants have basically matured
.

This technology realizes the dry integrated removal of multiple pollutants from the flue gas and the efficient regeneration
of carbon-based catalysts in one reaction system.
Among them, the removal reactor can adsorb and remove dust, heavy metals and sulfur dioxide; Nitrogen oxides react with the injected reducing agent ammonia to generate nitrogen emissions; The regeneration reactor can remove dioxins, realize the regeneration of sulfur dioxide, and combine sulfur resource technology to produce 98% concentrated sulfuric acid
.

Compared with the most mature Sumitomo technology in Japan, the reaction space velocity of this technology is increased by 1.
3 times, the desulfurization capacity of carbon-based catalysts is increased by more than 2 times, and the denitrification performance is increased from 40% to 80% of active coke, which can meet national emission standards, and investment and operating costs are significantly reduced
.

After more than 3 years of unremitting research, the two parties have built the mobile bed technology of six major unit systems, including dust removal and ash cleaning, pollutant removal, particle screening, material transmission, regeneration heating, sulfur dioxide rich transportation, and ammonia gas transportation, through optimizing the process, improving the automatic control system, equipment selection and transformation, etc.
, and realizing the automatic control matching between the units and the online monitoring
of pollutant concentration 。 Under the condition that the inlet soot content is more than 300 mg/cubic meter, the technical indicators of the self-developed carbon-based catalyst meet and exceed the expected goals, the desulfurization rate is greater than 99%, the denitrification rate is greater than 80%, the mercury removal rate is greater than 90%, and the regenerated highly concentrated sulfur dioxide gas can be directly prepared after purification
.

At present, the project team is actively optimizing relevant key technologies, improving the industrial preparation process of carbon-based catalysts, and carrying out demonstration and industrialization promotion
.

(Li Feng)