Continuous external heated water gas gasification furnace

Abstract

The invention relates to coal gasification technology, in particular to a continuous external heated water gas gasification furnace for preparing water gas by utilizing smokeless coal, and provides a continuous external heated water gas gasification furnace, which integrates preheating and gasification of smokeless coal and temperature reduction of the product produced during gasification of the smokeless coal into a whole process, and is large in water gas production, high in water gas production efficiency, and low in energy consumption. The adopted technical scheme is that a preheating bin is arranged at the top of a furnace body; one end of a vapor inlet through pipe is communicated with a hot gas heated vapor generation device; the hot gas heated vapor generation device is communicated with a water gas discharging device; the water gas discharging device is communicated with one end of a high temperature hot gas inlet passage of the preheating bin; a charging material distribution passage is arranged at the top of the furnace body; the upper end of the charging material distribution passage is connected with a feeding valve at the bottom of the preheating bin, and the lower end of the charging material distribution passage is communicated with the top of a gasification chamber of a gasification device; a spiral closed discharging device is arranged at the bottom of a material cooling chamber; a product stock bin is arranged at the bottom of the furnace body; the upper part of the product stock bin is connected with the spiral closed discharging device; the furnace has the advantages of large water gas production and low energy consumption.

Description

technical field [0001] The invention relates to the coal-to-gas technology, in particular to a continuous external heating water-gas gasifier utilizing anthracite to produce water-gas. Background technique [0002] Water gas is a low calorific value gas obtained by reacting water vapor with hot anthracite or coke. The main components are hydrogen and carbon monoxide. Carbon and steam mainly undergo the following water gas reaction: [0003] C+H2O===(high temperature) CO+H2 [0004] The above reactions are endothermic reactions, so heat must be supplied to the gasifier. Usually, air is sent into the furnace first, part of the fuel is burned, heat is stored in the fuel layer and the regenerator, and then steam is passed into the scorching fuel layer for reaction. Due to the heat absorption of the reaction, when the temperature of the fuel layer and the regenerator drops to a certain temperature, air is sent into the furnace again to raise the temperature, and the cycle is li...

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Problems solved by technology

The furnace structure adopts the UGI (named after the United Gas Improvement Company) gasifier type, which has the advantages of simple equipment and easy operation; the disadvantage is: due to the low production intensity of normal pressure operation, the production requires high-pressure synthesis The gas consumption is high and the production efficiency is low. The amount of water gas generated per square meter of furnace area is about 1000m3 / h, and the requirements for coal types are relatively strict. Usually, anthracite or coke with certain particle size requirements must be used. When using intermittent operation, the process pipeline is relatively complex

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