Every family’s ignition and smoking of households is the norm for coal burning in winter in rural areas in North China. It is also a major cause of severe haze. The decoupled stoves developed by the Institute of Process Engineering of the Chinese Academy of Sciences break the traditional concept of smoke emission from domestic coal-fired boilers burning bituminous coal and can not meet the environmental standards without using desulphurization, denitrification and dust removal equipment, and provide a solution to the problem of coal burning in rural and suburban areas. An effective way. The reporter learned from the process engineering of the Chinese Academy of Sciences that the stove has now entered the stage of demonstration and promotion.

Based on the invented decoupled combustion technology, energy-saving and environmental-friendly decoupled stoves developed for Yankuang bituminous coal clean coal, compared with traditional coal-fired boilers, nitrogen oxide emissions can be reduced by 30%-45%, saving coal The amount can reach 20%-30%, and it is beneficial to achieve high-efficiency sulphur in furnace and solid ash. The combustion of bituminous coal can also achieve the effect of “smoke-free emission”.

The expert appraisal organized by the Shandong Provincial Coal Bureau recently showed that the air pollutant discharge indicators of the decoupled stove series products fully meet the national environmental protection requirements, and the thermal performance indicators have reached the leading level in the industry.

Liu Xinhua, a researcher at the Institute of Process Engineering, introduced that the decoupled combustion technology is the only effective technology for reducing the emission of nitrogen oxides at home and abroad. In domestic decoupled coal-fired stoves, coal has undergone two processes of low-nitrogen combustion under low-temperature reducing atmosphere and burning of combustibles under high-temperature oxidation conditions, so that continuous continuous staged combustion can be achieved, thereby effectively reducing nitrogen oxides during coal combustion. Substances, carbon monoxide and smoke black emissions.

Yin Mingde, vice general manager of Yankuang Group, said that Yanzhou Mining Group has developed a high-efficiency, environmentally-friendly, inexpensive, and easy-to-use, low-pressure, and adhesive-free dry-press molding process, using abundant bituminous coal resources as raw materials, combined with composite chemical additive technology. The new modified clean coal used. The decoupled coal-fired stove and the Yankuang clean coal are effectively combined, and through the “coal stove matching”, various pollutants including nitrogen oxides, sulfur dioxide, and soot can be cooperatively controlled.

In the town of Chenggang, Zoucheng City, Shandong Province, the reporter visited several farmers who had installed decoupled stoves. The indoor warmth was warm and the roof chimney could not see black smoke. Tenants of Cheng Aniang said that her family of six people lived in a small two-story building. This winter, about 25 kilograms of coal is burned every day. After subsidies, a heating season equals 15 yuan per square meter for heating.

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