Internal-combustion heating rotary vane type biomass gasification furnace

Abstract

The invention discloses an internal-combustion heating rotary vane type biomass gasification furnace. The side wall of the furnace body is designed to be a jacket; the jacket successively comprises a gasification layer, a gasification layer wall, a hot exhaust gas layer, a hot exhaust gas layer wall, a fuel gas layer, a fuel gas layer wall and an insulation layer; a track is arranged on the gasification layer wall; two horizontal internal-combustion rotary pipelines are arranged at a same height below the central surface of the furnace body; a plurality of vane gap plates are alternately arranged in the two internal-combustion rotary pipelines along the circumferences of the walls thereof; the gaps of the vane gap plates are not communicated with the interiors of the internal-combustion rotary pipelines; vanes are arranged in the gaps of the vane gap plates; the overhang ends of the vanes are connected with the track; a feed hopper is arranged above the furnace body; the feed hopper is communicated with the gasification layer; a cone-shaped furnace bottom is borne at the bottom of the furnace body; the cone-shaped furnace bottom is communicated with the gasification layer; and a slag discharging hole is located at the cone bottom hole. According to the internal-combustion heating rotary vane type biomass gasification furnace, the gasification rate and the fuel gas heat value of the biomass are greatly improved, the secondary pollution is avoided and the gasification cost of the biomass is reduced, so that the internal-combustion heating rotary vane type biomass gasification furnace is suitable for various biomass raw materials to produce combustible gas, and the operation, the management and the maintenance are simple and convenient.

Description

technical field [0001] The invention relates to a gasification device, more specifically a gasification furnace using biomass as raw material. Background technique [0002] Biomass includes forestry materials, agricultural waste, municipal waste and livestock manure, etc. Biomass is a kind of renewable energy with abundant reserves, which can be used as an alternative energy source to achieve CO 2 Zero emission, and the low content of S and N in it can greatly reduce the greenhouse effect and environmental pollution. Biomass gasification is to convert biomass into combustible gas mainly composed of carbon monoxide, hydrogen and low molecular weight under certain thermochemical conditions. Factors affecting the effect of biomass gasification include the type of biomass and its pretreatment, the feed rate of biomass and the supply rate of gasification agent, the temperature and pressure in the reactor, etc. [0003] At present, the main problems in biomass gasification tech...

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Problems solved by technology

[0003] At present, the main problems in biomass gasification technology and gas utilization process are: first, the calorific value of gas is low. Due to the direct introduction of more air in the process of biomass gasification, the nitrogen content in gas exceeds 55%, and the heat of gas The value is generally lower than 7000KJ / m3; the second is that more tar is produced during the gasification process. Due to the introduction of more cold air during the gasification process, the temperature in the gasifier is not high enough, resulting in a high tar yield, which not only affects the gasifier normal work and gas transmission, storage and utilization, and waste a lot of energy and resources

Fluidized bed gasification furnace, the temperature in the furnace is high and constant, tar is cracked at high temperature to generate gas, tar in the gas is relatively small, but the gas released from the furnace contains more ash, and the structure of the fluidized bed gasification furnace is relatively complicated. Large equipment investment, many large-scale gasification equipment

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