Gasifier device for efficient slag removal with separation and heat recovery

Abstract

The invention discloses a gasifier device for efficient slag removal with separation and heat recovery. An outlet of a gasifier faces an inlet of a slag-gas separator and mutually communicates with the inlet of the slag-gas separator through a throat pipe; an outer wall of the slag-gas separator and the inner wall of a furnace body define an annular space; a gas outlet is designed on the furnace body above the annular space; the top end of the throat pipe is provided with a flume distribution device to enable water to be uniformly overflowed to the inner wall of the throat pipe to form a liquid film for protecting the inner wall; the flume distribution device of the throat pipe is provided with water nozzles for spraying water toward the interior of the throat pipe and spraying water intoan inner cavity of the throat pipe; and a circle of annular back blowing devices are installed at the lower part of the throat pipe to blow gas into the inner cavity of the throat pipe. The gasifier device has the advantages that residual water, which flows down along the wall of the throat pipe, at the lower ends of the water nozzles is blown away from the wall of the throat pipe by the annular back blowing devices when flowing through the annular back blowing devices, so that no water flows into the slag-gas separator. The technology saves investment, does not need a great quantity of waterto chill gas, is less in quantity of produced sewage, is environmentally friendly and can recover most of heat of the gas; and in addition, the gasifier and a heat exchange system are difficult in adhesion, and long-period stable running of the gasifier can be realized.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a gasifier device for efficient separation and removal of slag and heat recovery. Background technique [0002] At present, in the field of coal chemical industry, coal gasification devices occupy an important position. Although there are various processes, and the development has been rapid in the past 10 years, in general, there are two types, one is liquid slag discharged from the furnace, and coal gas The upward waste boiler process sent from the furnace, such as Shell furnace. The advantages of this type of furnace are good heat recovery and less sewage. The disadvantages are that the investment is large, the operation is difficult, there are many faults, and the operation period is relatively short. The second is the downstream water quenching process sent out from the co-current furnace of gas and slag, such as aerospace furnaces and Texaco furnaces. This...

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Problems solved by technology

However, from the perspective of production practice, the existing technology still does not solve the problem of ash and slag sticking to the wall, which will cause serious ash and slag accumulation inside the gasifier and heat exchange system, making it impossible to run stably for a long period of time

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