Entrained-flow bed gasification furnace for coal hydrogenation

Abstract

The invention discloses an entrained-flow bed gasification furnace for coal hydrogenation, which consists of a furnace body (1), a feed nozzle (3), a gasification chamber (2) and a semi-coke collection tank (7) and is characterized in that the furnace body (1) is divided into an upper part, a middle part and a lower part; the upper part of the furnace body (1) is a vertical section; the middle part of the furnace body (1) is an expansion section (6); the V-shaped semi-coke collection tank (7) is arranged at the lower part of the furnace body (1); the gasification chamber (2) is arranged at the upper part of the furnace body (1); the feed nozzle (3) is positioned at the top end of the gasification chamber (2); a coil heat exchanger (8) for preheating the feed gas is arranged between the gasification chamber (2) and the upper part of the furnace body (1); a product gas outlet (11) is formed in the furnace body (1) above the coil heat exchanger (8); a high-pressure gas spray pipe (5) is arranged at the lower part of the expansion section (6) of the furnace body (1); a discharge port (12) is formed at the bottom of the semi-coke collection tank (7). The entrained-flow bed gasification furnace disclosed by the invention has the advantages of low energy consumption, low hydrogen consumption and light dedusting load.

Description

technical field [0001] The invention belongs to a gasifier, in particular to an entrained-bed gasifier for coal hydrogenation. Background technique [0002] With the acceleration of my country's urbanization process and the improvement of environmental protection requirements, the demand for natural gas is increasing year by year. In 2010, my country's natural gas consumption was 100 billion m 3 , with a gap of 10 billion m 3 . It is estimated that my country's natural gas gap will reach 100 billion m in 2020 3 . According to my country's energy situation, the production of SNG technology from coal is an effective means to make up for the shortage of natural gas resources. [0003] Conventional coal-to-natural gas technology (also known as two-step method) converts coal into synthesis gas (CO+H 2 ), the syngas is then methanated to obtain SNG. This process is relatively mature, and it has been industrialized in the Great Plains factory in the United States in the 1880...

AI Technical Summary

Problems solved by technology

However, the circulation of a large amount of gas in this gasifier requires a lot of energy consumption. Whether the required circulation ratio can be achieved on an industrial scale by relying on the momentum of gas injection still needs to be verified by experiments. In addition, the gas circulation rate in the furnace is relatively high. Therefore, a large number of semi-coke particles are entrained by the gas, the amount of dust in the outlet gas is relatively large, and the dust removal load of the subsequent treatment system is relatively heavy.

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