High-temperature synthetic gas chilling device and high-temperature synthetic gas chilling method for gasification furnace

Abstract

The invention discloses a high-temperature synthetic gas chilling device and a high-temperature synthetic gas chilling method for a gasification furnace. The chilling device comprises the coal gasification furnace, a chilling chamber and a synthetic gas guide pipe, wherein the chilling chamber is a space formed in a mode that a round, rectangular or polygonal section moves along the normal direction of the section; multiple layers of sprayer units are distributed on the periphery of the chilling chamber; and each sprayer unit comprises multiple sprayers distributed in a tangential circle shape along the circumferential direction; when the synthetic gas generated by the coal gasification furnace enters into the chilling chamber through the synthetic gas guide pipe so as to be chilled, the sprayers spray a cooling medium along a direction opposite to the synthetic gas movement direction, so that the cooling medium and the synthetic gas are uniformly mixed. According to the device and the method, multiple layers of multiple sprayers distributed in a tangential circle shape along the circumferential direction are adopted for spraying the cooling medium along the direction opposite to the synthetic gas movement direction, so that the influence of the chilling boundary on the temperature of the gasification furnace is reduced; and the cooling medium is sprayed along the direction opposite to the synthetic gas movement direction, so that the mixing intensity is improved, the residual rotation momenta of the synthetic gas are reduced, the length of the outlet guide pipe of the chilling chamber of the gasification furnace is greatly shortened, and the cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of dry coal powder or coal water slurry or biomass or petroleum coke gasification quenching process, and more specifically relates to a high-temperature syngas quenching device and method for a gasifier. Background technique [0002] The second-generation coal gasification technology, such as Texaco coal-water slurry gasification and Shell dry pulverized coal gasification, has many advantages such as wide adaptability to coal types, high gasification pressure, large production capacity, high gasification efficiency, and low pollution. Therefore, it It is the preferred technology for the development of modern coal chemical industry. [0003] The Texaco gasification process is one of the new coal gasification processes in the 1980s. It is a pressurized gasification technology developed by the American Texaco Company with coal-water slurry as raw material and liquid slag discharge entrained bed. Texaca gasifie...

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Problems solved by technology

[0007] Aiming at the defects of the prior art, the purpose of the present invention is to provide a gasifier high-temperature syngas quenching device, aiming at solving the problem of lowering the temperature in the gasifier caused by injecting quenching water directly from the top of the gasifier in the prior art , Reduce gasification conversion efficiency and fail to ensure uniform mixing of syngas and cooling water, resulting in burnout of nozzles and shutdown of production

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