Method for making fluid bed produce high-temp. smoke and its equipment

Abstract

The present invention relates to a method for making fluidized bed produce high-temp. smoke and its equipment, belonging to the field of high-temp. smoke production technology by using coal. Said invention adopts the fluidized bed with reducing atmosphere combustion to simultaneously implement pyrolytic gasification and combustion of coal to make produced high-temp. smoke contain a certain quantity of inflammable gas, and make it flow into the heat-insulating secondary combustion chamber, under the action of tangential overfire air makes it continuously combust, and adopts liquid deslagging. The temp. of high-temp. smoke produced by said invention is up to 1350-1600 deg.C, and is uniforml and stable, and its ash content is low, its production cost is low, and the adaptability of the fuel is good, it can effectively prevent coking, and can make fluidized bed normally operate.

Description

technical field [0001] The invention relates to a method and a device for generating high-temperature flue gas by burning coal, in particular to a method and a device for generating high-temperature flue gas by using a fluidized bed. Background technique [0002] In the heating process of building materials, chemical industry, metallurgy, etc., higher temperature flue gas is required as the drying medium. In the past, fuel or gas hot blast stoves were often used, and the production cost was high. [0003] In the prior art, the coal-fired high-temperature flue gas generating device generally adopts a fluidized bed high-temperature flue gas furnace, which directly mixes the flue gas burned in the fluidized bed with air to adjust the temperature of the flue gas at the outlet or fluidizes it through indirect heating. The air buried in the bed gets the air at higher temperature. For example, the fluidized bed combustion high-temperature flue gas furnace developed by Babcock Wors...

AI Technical Summary

Problems solved by technology

However, during operation, the pyrolysis gas in the pyrolysis chamber is mixed with the high-temperature flue gas in the combustion chamber and burns rapidly. The melting of dust particles in the combustion space leads to coking, and a large number of coke blocks condense on the furnace wall at the exit. After that, it will fall into the pyrolysis fluidized bed, affecting the normal fluidization quality of the pyrolysis fluidized bed, thus affecting the reliability of operation

In addition, after pyrolysis, the coal char overflows from the pyrolysis fluidized bed to the combustion fluidized bed, and the pyrolysis gas generated by the pyrolysis fluidized bed and the high-temperature flue gas generated by the combustion fluidized bed flow back into each other, which affects the safety of operation. sex

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