Gasification device for classified gasification of moving bed, method for gasifying coal and applications thereof

Abstract

The invention provides a gasification device for the classified gasification of a moving bed, and a method for classified gasifying of coal and applications thereof. The device comprises a compression shell, a coal filling hopper, a coal distributor, a stirrer, axially symmetrical water clamping sleeves, a slag chilling chamber, a circulatory chilled water inlet, a circulatory chilled water outlet, and a slag seal hopper, wherein, the top and the bottom of the compression shell are respectively provided with a first opening and a second opening, the upper lateral side of the compression shellis provided with a first coal gas outlet, and the same horizontal level at lower part of the compression shell is evenly provided with at least two gasification agent nozzles; the coal filling hopperis arranged on the first opening at the top of the compression shell; the coal distributor is arranged at the upper part in the compression shell; an axially symmetrical water clamping sleeve is arranged in the inner side below the first coal gas outlet of the compression shell, and the inner part of the axially symmetrical water clamping sleeve forms a gasification chamber; the slag chilling chamber is arranged below the second opening at the bottom of the compression shell; and the slag seal hopper is arranged below the slag chilling chamber. The invention is characterized in that at least two fine coal and gasification agent burners are evenly arranged at the lower part of the compression shell of the gasification device and the same horizontal level of the at least two gasification agent nozzles in a staggering manner.

Description

technical field [0001] The invention generally relates to the field of gasification for producing coal gas from carbon-containing raw materials, and specifically relates to a moving bed gasification device for staged gasification, a coal staged gasification method and its application. Background technique [0002] Coal gasification is a key leading technology for clean and efficient conversion of coal, and it has developed rapidly with the construction of coal-to-oil and coal chemical projects. Moving bed, fluidized bed and entrained bed gasification in gasification technology have their own advantages and disadvantages, and all of them have been applied in different degrees in my country. [0003] Atmospheric moving bed gasification has been widely used in my country because of its mature technology and simple operation. Producer gas is mainly used as industrial fuel gas because of its low active ingredients and low calorific value. The water gas furnace is mainly used in...

AI Technical Summary

Problems solved by technology

With the extensive use of mechanized coal mining technology, the yield of lump coal has decreased, so the source of raw coal is limited, and the price is higher than that of pulverized coal.

In addition, for coal with poor thermal stability, it is best to use molding technology to make briquettes first, and then add them to the gasifier, which will undoubtedly increase the cost of raw materials

Images