Heat pipe heating fluidized bed biomass and coal co-pyrolysis system

Abstract

The invention relates to a heat pipe heating fluidized bed biomass and coal co-pyrolysis system. A heat pipe heating fluidized bed biomass and coal co-pyrolysis device is utilized, the main body is divided into two parts, the upper part is a pyrolysis furnace, and the lower part is a combustion furnace; a high temperature heat pipe vertically penetrates through the pyrolysis furnace and the combustion furnace, one end of the combustion furnace is a heat absorption section for absorbing heat released by semi-coke combustion, and then the heat is upwards transferred to the pyrolysis furnace; one end of the pyrolysis furnace is a heat release section for releasing heat for indirect pyrolysis of biomass and coal. The system overcomes the defect of low calorific value of pyrolysis gas generated by existing up-absorption or down-absorption direct pyrolysis (can reach 4300kcal / Nm<3>). The waste heat of ash is sufficiently utilized to preheat air, the waste heat of pyrolysis gas and smoke is utilized to generate water vapor, a part of the water vapor is used as a pyrolysis gasification agent, and the other part of the water vapor can be used for generating power and supplying heat. The system realizes multistage utilization of heat energy, and the device is simple in structure, high in heat transfer efficiency and high in reliability.

Description

technical field [0001] The invention relates to a biomass pyrolysis system, in particular to a heat pipe fluidized bed biomass and coal co-pyrolysis system. technical background [0002] (1) The previous gasifiers mostly used up-suction or down-suction to inhale air and burn reactants to release heat for pyrolysis. After the oxygen in the air reacted, a large amount of nitrogen remained, so that the pyrolysis gas generated had a low calorific value. In order to improve Using pure oxygen, hydrogen, etc. as the gasification agent for the calorific value of gas will bring defects such as complex equipment structure and increased cost. [0003] (2) The current biomass gasifier can only gasify biomass, the energy density of biomass is low, the gasification temperature alone is low, and a lot of tar will be produced, and the supply of biomass is greatly affected by the season. [0004] (3) Prior to this, there were pyrolysis furnaces that used heat pipes to supply heat to indirec...

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Problems solved by technology

[0003] (2) The current biomass gasifier can only gasify biomass, the energy density of biomass is low, the gasification temperature alone is low, and a lot of tar will be produced, and the supply of biomass is greatly affected by the season

[0004] (3) Prior to this, there were pyrolysis furnaces that used heat pipes to supply heat to indirectly pyrolyze biomass, but they used part of the pyrolysis gas to burn heat to heat the heat pipes, and could only pyrolyze biomass, and the pyrolysis temperature was low

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