Powdered coal and coal slurry composite coal gasification device and technical method

Abstract

The invention discloses a powdered coal and coal slurry composite coal gasification device and a technical method. The device comprises a furnace body, wherein a burner injector is arranged at the top of the furnace body; a water-cooled wall is mounted at the upper part in the furnace body in a sleeving manner; the cavity of the water-cooled wall forms a gasification chamber; the bottom of the water-cooled wall is connected with a gas -liquid baffling separation device; a synthesis gas chilling device is arranged in the joint of the water-cooled wall and the gas - liquid baffling separation device; the gas -liquid baffling separation device is connected with a downtake; a jacketed gas guide pipe is mounted on the outer surface of the downtake in a sleeving manner; a synthesis gas cooling chamber is formed between the gas guide pipe and the downtake; a sealed annular cavity is formed between the water-cooled wall and the furnace body. The device has the advantages that the equipment structure is novel, the technology is simple, the efficiency is high, the service life is long, the process cooling air can be reutilized, the system coal slurry can be settled and recycled, the cost is reduced, and the device is safe and stable in operation on the premise that the requirements of a process device are satisfied.

Description

technical field [0001] The invention relates to a novel energy-saving coal gasification production process device; in particular, it relates to a pulverized coal and coal slurry composite coal gasification device and process method. Background technique [0002] Coal gasification is an important direction of coal utilization technology. It converts coal into combustible gas or chemical raw materials, and its main component is a mixture of carbon monoxide and hydrogen. [0003] At present, there are disadvantages in the high-efficiency coal gasification device: 1. The gasification raw material in the dry pulverized coal gasification device is a single dry pulverized coal single burner or multiple burners jet combustion, gasification to generate crude synthesis gas, and the crude synthesis gas is cooled and washed by circulating water The formed black water contains a large amount of carbon components that have not been effectively utilized, resulting in waste; 2. The coal-wat...

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Problems solved by technology

[0003] At present, there are disadvantages in the high-efficiency coal gasification device: 1. The gasification raw material in the dry pulverized coal gasification device is a single dry pulverized coal single burner or multiple burners jet combustion, gasification to generate crude synthesis gas, and the crude synthesis gas is cooled and washed by circulating water The formed black water contains a large amount of carbon components that have not been effectively utilized, resulting in waste; 2. The coal-water slurry gasification device generates crude syngas for coal slurry injection gasification. The gasification furnace is a brick gasification chamber structure, and the furnace wall The service life is about one year, and the replacement cost is high and the cycle is long; and the coal water slurry process has a large demand for primary water

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