Cyclone separator for crude gas dust removal in crushed coal pressurized gasification and application

Abstract

A cyclone separator for crude gas dust removal in crushed coal pressurized gasification comprises a cyclone dust collector (1) and a dust tank (13). The cyclone dust collector (1) comprises an outer cylinder (11) and an inner cylinder (5). The upper portion of the outer cylinder (11) is vertical, the lower portion of the outer cylinder (11) is conical, and the outer cylinder (11) is composed of an outer cylinder outer wall (8) and an outer cylinder inner wall (9). The inner cylinder (5) is fixed to the outer cylinder inner wall (9) through a stretching part (10). A gas inlet (2) is connected with the lower portion of the inner cylinder (5) through the outer cylinder (11), and a gas outlet (3) is located in the top end of the outer cylinder (11). A cyclone dust collector hot water outlet (7) is formed in the upper portion of the outer cylinder outer wall (8), and a cyclone dust collector hot water inlet (6) is formed in the lower portion of the outer cylinder outer wall (8). A bottom end outlet of the outer cylinder (11) is connected with the top end of the dust tank (13) through an oily dust discharge valve (4). The cyclone separator for crude gas dust removal in crushed coal pressurized gasification has the advantages of being high in oily dust removal efficiency, free of wastewater generation, high in treatment capacity and high in operation flexibility.

Description

Technical field [0001] The invention belongs to a kind of dust removal equipment, in particular to a cyclone separator for dust removal of crushed coal pressurized gasification crude gas. Background technique [0002] The crushed coal pressurized gasifier is a fixed-bed coal gasifier. Due to the low requirements for raw coal, all other coal types can be gasified except for strong caking coal, especially low-rank coal and high-ash melting point coal. Inferior coal and gasification coke. The gasifier is widely used in the fields of coal-to-synthetic ammonia, methanol, dimethyl ether, synthetic oil and natural gas. However, the current industrially operating crushed coal pressurized gasification process uses the second edition of the modern coal chemical technology manual in the dust removal and deoiling process. The five fixed-bed gasification processes introduced in pages 424 to 428 are all used The water washing and dust removal and deoiling processes cause a large loss of sens...

AI Technical Summary

Problems solved by technology

However, the crushed coal pressurized gasification process currently in industrial operation adopts the second edition of the Modern Coal Chemical Technology Handbook in the dust removal and deoiling process. Water washing, dust removal, and deoiling processes cause a lot of sensible heat loss of crude gas, which is not conducive to heat recovery and utilization, and also causes a large amount of gas water circulation and high operating costs

Patent: Process and device for coal-based clean gas, patent number: 201410767710.7 The published patent uses cyclone dust removal and deoiling, but the cyclone dust removal structure is not disclosed, and tar condensation is prone to occur when the crude gas outlet temperature is low, resulting in blockage of the slag outlet, affect stable operation

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