New breakthroughs in the development of small and medium decoupled coal-fired boilers

According to statistics, at least 200 million people in rural areas and suburban areas in China currently use relatively scattered means of heating coal. China's coal-fired power generation accounts for about 75% of the total electricity generation.

Experts pointed out that from the point of view of domestic energy structure and economic development, the adoption of clean and efficient small and medium-sized coal-fired boilers will be a practical and effective way to reduce the emission of pollutants from dispersed heat users. “If you do not upgrade and replace existing coal-fired boilers Management, its low efficiency, high pollution problems, safety hazards and impact on the environment will be several times its fuel consumption.

As a result, the Chinese Academy of Sciences' process engineering invented the decoupled combustion technology. This is the only effective domestic and foreign technology that can effectively reduce NOx emissions in small and medium-sized coal combustion. This technology achieves the combined combustion of pyrolysis gas and semi-coke produced by the coal itself by making the coal go through two processes of low-nitrogen combustion and combustibles burning under high-temperature oxidation conditions in a low-temperature reducing atmosphere, thereby effectively suppressing NOx in the combustion process. Generated, NOx emissions reduced by 30% to 45%.

In addition, the small and medium-sized decoupled coal-fired boilers have stable combustion, high burnout rate, low exhaust gas temperature and excess air coefficient, and can reach 20% to 30% of the conventional coal-fired coal savings, and can be used directly without molding. Biomass.

Experts suggest that in order to achieve major breakthroughs in energy-saving and emission reduction for dispersed users and reduce ash pollution, it is important to promote the use of decoupled combustion small and medium-sized centralized heating systems in China's rural areas and suburban areas, including the implementation of decentralized heating for users. Centralize specialized management, formulate effective policies to support the healthy development of products in the dissipative hot user market, and establish distributed energy stations that can meet the different needs of dispersed users.

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