Preparation method for hydrogen-rich gas through steam gasification of solid organic matter

Abstract

The invention provides a preparation method for hydrogen-rich gas through steam gasification of a solid organic matter. The method comprises the following steps: heating the raw material--the solid organic matter in a pyrolysis apparatus for pyrolysis; and subjecting a gaseous product produced after pyrolysis and steam to gasification in a moving bed gasification apparatus so as to produce the hydrogen-rich gas. The invention further provides a system for preparing the hydrogen-rich gas from the solid organic matter. The system comprises a solid thermal carrier gradient deduster, the pyrolysis apparatus, the moving bed gasification apparatus and a riser combustion reactor. The method provided by the invention is implemented at normal pressure, has simple process and is applicable to gasification and co-gasification of a variety of organic matters with high content of volatile components, including raw materials with high content of moisture, mineral matters and sulfur.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and relates to a method for producing hydrogen-rich gas by vaporizing solid organic raw materials and their mixtures by using circulating solid heat carrier as heating medium, catalyst and filter material for dust removal. Background technique [0002] Steam gasification of solid organic matter is an ideal mode to produce hydrogen-rich gas. To realize this process, at least two problems need to be solved: providing the heat required for steam gasification and eliminating or reducing tar in the gas. [0003] Chinese invention patent ZL200610113063.3 discloses a decoupling fluidized bed gasification method and device. The fluidized bed reactor is divided into two interconnected chambers, one of which is mainly used for drying and pyrolysis of solid fuel, and the other One chamber is used for semi-coke gasification and upgrading of tar and hydrocarbons. Among them, the heat req...

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Problems solved by technology

The limitation of this method is that the pyrolysis reactor and the gasification reactor are connected in series, and the solid heat carrier from the riser combustion reactor passes through the gasification reactor and the pyrolysis reactor in turn, and then returns to the riser combustion reactor, so , the operating conditions of the pyrolysis reactor and the gasification reactor are mutually restricted. The temperature of the solid heat carrier entering the pyrolysis reactor depends entirely on the degree of reaction in the gasification reactor. The type and quantity of the solid heat carrier cannot be controlled independently, so it is difficult to realize the optimal operation of the pyrolysis reactor and the gasification reactor respectively.

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