Biomass gasifier with cracking chamber

Abstract

The invention discloses a biomass gasifier with a pyrolysis chamber. The biomass gasifier comprises a gasifier body, a pyrolysis chamber, a plurality of gas inlet pipes and a gas duct, wherein the gasfier body comprises a gasification chamber, a combustion chamber and a gas collection chamber; the pyrolysis chamber is divided into a first-level pyrolysis chamber, a second-level pyrolysis chamber and a third-level pyrolysis chamber which are successively arranged from inside to outside by two annular clapboards, each annular clapboard is provided with a gas hole so as to enable the pyrolysis chambers of two adjacent levels to be mutually communicated, and the first-level pyrolysis chamber is provided with a gas inlet; one end of each gas inlet pipe extends into the combustion chamber along the tangential direction of the combustion chamber, the other end of the gas inlet pipe is communicated to a combustion-supporting gas supply device arranged out of the gasifier body, the pipe mouth of the gas inlet pipe is of a flat mouth shape, the length direction of the pipe mouth of the gas inlet pipe is in parallel with the axial direction of the combustion chamber, and the width of the pipe mouth is 0.3-0.5cm; the gas duct is arranged out of the gasifier body, one end of the gas duct is communicated to the gas collection chamber, and the other end of the gas duct is communicated with the gas inlet of the first-level pyrolysis chamber. The tar content of combustible gas can be lowered, and the quality of the combustible gas is improved.

Description

technical field [0001] The present invention relates to a biomass gasifier with a cracking chamber. Background technique [0002] Biomass includes natural plants, manure, and urban and rural organic waste, and is a non-fossil renewable energy source. Compared with the energy utilization method of direct combustion of biomass, the utilization of biomass after pyrolysis and gasification has the advantages of expanding uses, reducing pollution, and being clean and efficient. However, biomass pyrolysis and gasification technology in my country is relatively backward. At present, biomass pyrolysis and gasification treatment equipment mainly adopts fixed bed gasifier and atmospheric fluidized bed gasifier. A large amount of phenolic water, high tar content, serious secondary pollution, small gas production per furnace, and low calorific value of the combustible gas produced have been restricted from use; the temperature fluctuation range in the atmospheric fluidized bed gasifier i...

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Problems solved by technology

However, my country's biomass pyrolysis and gasification technology is relatively backward. At present, the biomass pyrolysis and gasification treatment equipment mainly adopts fixed bed gasifier and normal pressure fluidized bed gasifier. A large amount of phenol water, high tar content, serious secondary pollution, small gas production per furnace, and low calorific value of the combustible gas produced have been restricted for use; the temperature fluctuation range of the atmospheric fluidized bed gasifier is large, The production process is difficult to control, the operation reliability is poor, the heat loss is large, the slag discharge has a high carbon content, the produced combustible gas contains a lot of nitrogen, the calorific value is low, and the gas has a high dust concentration and is difficult to purify, so it has not been obtained so far. widely used

Moreover, because the lignin of the organism contains tar, the content of tar in the combustible gas generated after biomass combustion is also high, resulting in the generated combustible gas having peculiar smell, polluting the environment during use, and is not conducive to transportation and storage

The backwardness of biomass pyrolysis gasification technology hinders the clean and efficient utilization of biomass energy in my country

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