Method and device for producing syngas by combustion and gasification of double cylinders

Abstract

The invention relates to a method and a device for producing syngas by combustion and gasification of double cylinders, which comprises a combustion furnace and a gasification furnace in a double-cylinder structure, as well as a matching indirect gasification device comprising a feeding system, a gas-solid separation system, a heat recovery utilization system and the like, wherein the combustion furnace constitutes an inner cylinder of the device, the gasification furnace is positioned in an annular space between an outer cylinder and the inner cylinder, and the reaction control of the gasification furnace can be implemented by zoning. The supply of materials is realized by a hopper, a feeder, a driving gear, a rotating disc and the like, and the materials in the hopper are sent onto the rotating disc in the gasification furnace via the feeder and respectively sent to feeding valve ports of the combustion furnace and the gasification furnace via the rotating disc, thereby realizing the distribution and the transportation of the materials. The invention provides an indirect gasification method with higher efficiency and a compact integrated device, and the device has high reliability and high utilization efficiency of energy, and can be used for directional gasification of coal or biomass, or be used as a matching device for producing combustible gas with high calorific value through combustion of the coal and the biomass.

Description

technical field [0001] The invention relates to a technology for producing synthesis gas by combustion gasification, in particular to a method and an integrated device for producing synthesis gas by combustion gasification using coal or biomass semi-coke as raw materials. Background technique [0002] Due to the increasing scarcity of petroleum resources, the use of coal resources or biomass resources to synthesize high-grade liquid fuels and chemicals by gasification is gradually becoming an efficient resource utilization method. There are many technical methods for converting coal or biomass into liquid fuels, including direct liquefaction conversion, enzyme catalytic conversion, thermochemical conversion, etc. Among them, combustion gasification technology and catalytic synthesis convert low-grade energy products into high-value and high-calorific value liquid fuels. Thermochemical conversion technology has become its core technology, and combustion gasification to produc...

AI Technical Summary

Problems solved by technology

But its main problems are: the composition of gas products is complex, CO 2 The proportion of gas in the product is relatively high. When air is used as the combustion gas, nitrogen and inert gas emissions in the air will take away a large amount of heat of reaction

[0018] 1) The heat transfer from the combustion furnace to the gasifier is realized by the circulating flow of the flowing material between the two furnaces at a certain air velocity with the help of a spiral separator and a material controller. The energy transfer efficiency depends on the heat capacity of the flowing material and The circulating flow between the two furnaces is less efficient than direct thermal radiation heat transfer or convective heat transfer;

[0019] 2) High-temperature furnace bodies such as independent combustion furnaces and gasifiers have external heat dissipation, large heat dissipation area, and large heat loss of the system;

[0020] 3) In order to ensure the flow and transfer of solid flow materials between the combustion furnace and the gasification furnace, many high-temperature control components are required, the failure rate of the equipment is high, and there are certain difficulties in the use and maintenance of the system

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