Positive pressure, fully enclosed polygeneration gasifier

Abstract

The invention discloses a positive pressure and totally-enclosed poly-generation gasifier. A feeding hole, a main bin, two transition cone valve cylinders, an intermediate transition bin, a water tank and a water cooling system are arranged on the top of the gasifier; a feeding cylinder which is connected with a feeding part and extends to the lower part of an intermediate reaction cavity is arranged in the intermediate reaction cavity of the gasifier; an external driven toothed fire grate, a fire grate driving system and an intermediate cooling water system are arranged at the lower part of the cavity; the upper part of the cavity is provided with an air outlet; a lower cavity body is provided with a fan blown air inlet; the bottom of the gasifier is provided with a charcoal discharge hole and a cooling device. The gasifier has the advantages that the reaction intensity is controlled by virtue of blowing; enclosure is ensured during feeding; less dust is discharged at the air outlet, so that an air outlet pipe is not blocked; automatic charcoal discharge can be controlled according to the upper temperature of the fire grate; the air outlet is under positive pressure, so that a draught fan is not needed in a gas production pipeline, the generated flammable gas is available after being purified, and a charcoal product is obtained. The gasifier solves the problems that a positive pressure air outlet feeding system at the upper part of a gasifier body of an existing gasifier cannot be enclosed and the draught fan which must be added at the outlet of the gasifier is easy to damage and leads to complex operation. The gasifier realizes efficient utilization of biomass resources, and is wide in adaptability and stable in operation.

Description

technical field [0001] The invention relates to a positive-pressure, fully-sealed multi-generation gasification furnace, which belongs to the field of biomass energy. Background technique [0002] In the current biomass resource utilization gasification technology, updraft fixed bed and downdraft fixed bed are widely used. The downdraft gasifier has the problems of poor furnace stability and limited raw material adaptability. Type gasifier has the problem of uneven charcoal output and combustible gas leaking from the feed port when the upper part of the furnace chamber is under positive pressure. When the hot gas of the two types of furnaces is used by the boiler, an exhaust fan must be added to the outlet pipeline. The gas has not been completely purified, the fan maintenance rate is very high, and there are many safety hazards. At present, a large number of small and medium-sized coal-fired boilers owned by enterprises across the country are in a state of being out of serv...

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Problems solved by technology

[0002] In the current biomass resource utilization gasification technology, updraft fixed bed and downdraft fixed bed are widely used. The downdraft gasifier has the problems of poor furnace stability and limited raw material adaptability. Type gasifier has the problems of uneven charcoal output and combustible gas leaking from the feed port when the upper part of the furnace chamber is under positive pressure. When the hot gas of the two types of furnaces is used by the boiler, an exhaust fan must be added to the outlet pipeline. The gas has not been completely purified, the fan maintenance rate is very high, and there are many safety hazards; at present, a large number of small and medium-sized coal-fired boilers owned by enterprises across the country are in a state of being out of service and urgently needing rectification due to serious pollution and environmental protection requirements.

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