Solid fuel combustion and gasification device for horizontal pressurized fluidized bed or spouted bed

Abstract

The invention discloses a general combustion and gasification device for a pressurized fluidized bed or a spouted bed for a solid fuel containing carbon and hydrogen, and aims to solve the problems of much flying ash, high carbon content of the flying ash, high carbon content of discharged ash and low coal utilization rate of the solid fuel in the FBC, PFBC or fluidized bed or spouted bed solid fuel gasification device. The device consists of a gas distribution unit, a fuel feeding unit, a pressurized fluidized bed or spouted bed unit and a flying ash treating unit. The device has the remarkable characteristics that the pressurized solid fuel fluidized bed or spouted bed device is changed into a horizontal form from a vertical form so as to be more suitable for the combustion or gasification under a pressurizing condition; the structure is simplified; and a special flying ash treating device is provided for reducing the carbon content of the flying as in product gas and converting the carbon into efficient gas component. The device can be widely applied to the combustion of coal, oil shale or other organic biomass waste, three-waste treatment or production of gas, oil or ammonia and carbon chemistry. The device is particularly suitable for the pressurized fluidized bed or a spouted bed boiler (PFBC) or a coal gasifier, and can also be used in the field (IGCC) of gas-vapor combined cycle and used for boiling furnaces for producing acid from pyrite.

Description

technical field [0001] The patent of the present invention relates to a combustion and gasification device of solid fuel containing carbon and hydrogen, in particular to a coal combustion or gasification device of a horizontal pressurized fluidized bed or spouted bed. Background technique [0002] The gasification reaction of coal takes place between carbon and hydrogen and oxygen-carrying gasification agents (air, O 2 、H 2 O.CO 2 ) An incomplete oxidation reaction between. Coal gasification technology is the industrial basis for the development of processes such as coal-to-gas, coal-to-oil, coal-based chemicals, and combined cycle power generation systems. For coal gasification, there are fixed bed (UGI furnace, Lurgi furnace), fluidized bed (Winkler furnace, CFB, PCFB furnace, U-gas furnace, etc.), entrained flow bed (K-T furnace, Texco furnace, Shell furnace, etc.) and melting bed fixtures. Fixed-bed gasifiers generally use lump coal as raw material, and the screenin...

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Problems solved by technology

[0005] The purpose of the patent of the present invention is to provide a method to solve the problems of too much fly ash in the product gas, high carbon content and low carbon utilization rate in the fluidized bed or spouted bed solid fuel gasification or combustion device, and at the same time improve the product gas Medium effective gas composition, pressurized gasification process can significantly reduce the compression energy consumption required for the next process

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