Composite lining and entrained bed gasifier

Abstract

The invention discloses a composite furnace lining, which comprises a water-cooled wall layer (3) and an intermediate layer (4) laid on the inner wall surface of the water-cooled wall layer, and a fire-directing layer (10) is laid on the inner wall surface of the intermediate layer , and the maximum service temperature of the material on the fire layer is higher than the maximum service temperature of the material on the middle layer. The invention also discloses an entrained-flow gasification furnace, which includes a furnace body (1) and a furnace chamber surrounded by the furnace body (1). The upper part of the furnace chamber forms a gasification chamber (2). The above-mentioned composite furnace lining is installed on the inner side wall of the corresponding furnace body. The composite furnace lining of the invention can realize that the high-temperature fluid slag formed by the gasification reaction easily attaches to the fire-directed layer and forms a smooth flow on the fire-directed layer. This makes the dynamic process of "resisting slag with slag" more stable, so that the high-temperature resistant protective layer formed by the fire layer and slag can effectively protect the middle layer and the water-cooled wall layer.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a composite furnace lining and an entrained-flow gasifier. Background technique [0002] Coal gasification technology is the basis for the development of coal-based chemicals, liquid fuels, IGCC power generation, hydrogen production and other processes, and is a leading technology in the coal chemical industry. Due to the rapid development of industries such as synthetic ammonia, methanol, dimethyl ether, coal-to-oil, and coal-to-olefins, China's coal gasification process is rapidly transitioning from the old-fashioned UGI furnace lump coal intermittent gasification to the advanced pulverized coal gasification process. There is a strong demand for various types of pulverized coal gasification technology and equipment. Compared with fixed bed and fluidized bed coal gasification technology, entrained bed coal gasification technology has large production capacity, high carbon ...

AI Technical Summary

Problems solved by technology

However, the actual working conditions are that the oxygen-carbon ratio is not easy to control, and the temperature in the furnace may fluctuate greatly. Therefore, the water-cooled wall layer structure in the prior art often suffers serious failures due to the inability to resist the fluctuation in the furnace temperature.

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