Combined combustion device for combustion semi-coke, and combustion method

Abstract

The invention discloses a combined combustion device for combustion semi-coke, and a combustion method. The combined combustion device comprises a combustion chamber, a flameless combustor, a powder feeding device, a gas pipeline, a primary air channel, a secondary air channel, a gas supplementing air channel and a smoke pipeline. According to the combined combustion device for the combustion semi-coke, and the combustion method, efficient and low-pollution utilization for the semi-coke can be realized; and mixing combustion for the semi-coke and pulverized coal is carried out in a manner of combined combustion, the volatilization and ignition characteristics of the semi-coke are improved, the burn-out of the semi-coke is promoted, a uniform temperature of the combustion chamber and low original emission of nitric oxides are realized, and then efficient, clean and large-scale combustion utilization for the semi-coke is achieved.

Description

technical field [0001] The invention relates to the technical field of semi-coke combustion, in particular to a combined combustion device and a combustion method for burning semi-coke. Background technique [0002] Energy and chemical utilization schemes developed on the basis of coal gasification, hydrogasification, and coal pyrolysis technologies are becoming an important development direction for efficient, clean, and economical development and utilization of coal. However, the coal gasification process will produce a large amount of ultra-low volatile (less than 4%) semi-coke. This kind of semi-coke has high ignition temperature, slow combustion reaction rate, and long burnout time, and is no longer suitable as an industrial raw material. Combusting semi-coke is an important technical means for large-scale utilization of semi-coke. Under conventional combustion methods, semi-coke has significant problems such as: (1) difficulty in ignition; (2) low burnout rate; (3) h...

AI Technical Summary

Problems solved by technology

The Japanese patent No. JP2014018726-A proposes a "power plant using low-rank coal chemical looping combustion for thermal power generation", which utilizes low-rank coal through chemical looping combustion and enriches the CO in it 2 , but the system is still designed for the chemical looping combustion of coal, and cannot efficiently burn and utilize ultra-low volatile semi-coke

[0004] In general, a large amount of ultra-low volatile semi-coke produced in the coal gasification process is currently difficult to use as industrial raw materials on a large scale

However, the traditional combustion method for the combustion and utilization of semi-coke has significant problems such as difficult ignition, difficult burnout and high pollutant emissions.

In order to realize the large-scale efficient and low-pollution utilization of semi-coke, it is necessary to adopt a new type of combustion technology to solve the shortcomings of semi-coke such as difficulty in ignition, low burnout, and high pollutant emissions.

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