Three-stage gasification device for producing synthesis gas through biomass pyrolysis and gasification

Abstract

The invention provides a three-stage gasification device for producing synthesis gas through biomass pyrolysis and gasification. The three-stage gasification device is provided with a reacting furnace as a main body, the reacting furnace is in a cylindrical or square structure, an upper pyrolysis hearth inside the reacting furnace is a biomass pyrolysis reaction chamber, a lower gasification hearth is a pyrolysis product steam fluidization and gasification chamber, and a middle hearth of the reacting furnace is provided with an annular catalyst bed layer (a catalytic pyrolysis and gasification chamber). The upper pyrolysis hearth is provided with a feeding device and communicated with the lower gasification hearth. The bottom of the lower gasification hearth is provided with a mixed gas inlet. The upper end of the furnace body of the reaching furnace is provided with a smoke outlet connected with a cyclone separator. A temperature control device is respectively and correspondingly arranged at the outer side of the reacting furnace. An experiment system for the whole production process of synthesis gas is simplified, the gas yield of a gasification furnace is increased, the quality of the synthesis gas is improved, and the tar content in the produced gas is reduced. The device provided by the invention has the advantages of convenience in temperature control, energy saving, environment friendliness, continuation in running, simple structure and the like.

Description

technical field [0001] The invention belongs to the technical field of biomass energy chemical industry, and in particular relates to a gasification device for producing syngas by three-stage biomass pyrolysis gasification. technical background [0002] Biomass is a variety of organisms formed through photosynthesis. It is directly or indirectly derived from the photosynthesis of green plants and can be converted into conventional solid, liquid and gaseous fuels. It is widely distributed and available in large quantities. It is a kind of Renewable energy, and also the only renewable natural raw material that contains hydrocarbon components and thermal energy, can be stored, uses biomass for energy utilization and chemical production, has CO 2 Characterized by zero emissions. With the decrease of traditional fossil energy reserves and the environmental pollution caused by the use of fossil energy, it has become the consensus of governments to attach importance to and develop...

AI Technical Summary

Problems solved by technology

However, the fluidized bed reactor is also sensitive to the physical properties of the raw material, the operation is not easy to control, the operating temperature is generally low, the tar content in the outlet synthesis gas is also considerable, and the CH in the gas produced 4 and CO 2 The content is relatively high, and follow-up equipment is generally required to deal with problems such as tar and recombined synthetic gas, which makes the gasification system and equipment more complicated

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