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Process for internally heated continuous preparing biomass pyrolysis gasification gas and rotary furnace utilized by same

A technology for pyrolysis gasification and pyrolysis gas, which is applied in the fields of biofuels, manufacture of combustible gases, coke ovens, etc. It can solve the problems of affecting the quality of finished gas and occupying a large space, and achieve convenient operation, accurate control of material balance, and output. big effect

Active Publication Date: 2010-04-14
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the disadvantages of the existing technology that the inert components produced after the combustion of the returned furnace gas affect the quality of the product gas, and the entire system takes up a relatively large space, the present invention provides a method for continuously preparing biomass pyrolysis gasification gas with internal heating and its use. The rotary kiln has the advantages that the inert components do not enter the system and the system occupies a small space

Method used

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  • Process for internally heated continuous preparing biomass pyrolysis gasification gas and rotary furnace utilized by same
  • Process for internally heated continuous preparing biomass pyrolysis gasification gas and rotary furnace utilized by same
  • Process for internally heated continuous preparing biomass pyrolysis gasification gas and rotary furnace utilized by same

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Effect test

Embodiment 1

[0035] A method for continuously preparing biomass pyrolysis gasification gas by internal heating, the steps are:

[0036] The biomass enters the furnace head preheating section of the pyrolysis gasification converter through the feed port, and the biomass is one or a mixture of wood blocks or fruit shells. The biomass moves from right to left in the furnace, and exchanges heat with the crude pyrolysis gas coming out of the pyrolysis section of the rotary furnace from left to right. After the biomass completes the drying and preheating process, the temperature of the crude pyrolysis gas after heat exchange After falling to 70°C, the crude pyrolysis gas is discharged from the outlet and enters the purification process for purification. Part of the purified gas is returned to the combustion device as returned gas to be mixed with air for combustion, and the heat generated is heated by the wall of the rotary inner cylinder through the flue. The biomass, the other part enters the ga...

Embodiment 2

[0045] A method for continuous pyrolysis and gasification of biomass converters. Firstly, wood blocks with a size of 50±30mm are sent into the pyrolysis and gasification rotary furnace, and they move from right to left in the furnace, and are pyrolyzed by the rotary furnace body. The crude pyrolysis gas coming out of the section from left to right is heat-exchanged. The wood blocks complete the drying and preheating process. After the heat exchange, the temperature of the crude pyrolysis gas drops to 70°C, and then it is discharged from the crude pyrolysis gas outlet for purification. The purified Part of the gas is returned to the combustion device 4 as returned gas to be mixed with air for combustion, and the heat generated passes through the flue 5 to heat the biomass in the rotating inner cylinder through the wall of the rotating inner cylinder, and the other part enters the gas cabinet for use;

[0046] After preheating and drying, the wood blocks enter the pyrolysis secti...

Embodiment 3

[0061] Such as figure 2 and 3 Shown, a kind of rotary kiln used in the method for the described internal heating type continuous preparation of biomass pyrolysis gasification gasification, described rotary kiln is from left to right by furnace head preheating section I, rotary kiln body pyrolysis Section II and furnace tail cooling section III are composed. The pyrolysis section II of the rotary furnace body is connected with the furnace head preheating section I and the furnace tail cooling section III through two supporting rollers at the front and rear.

[0062] A screw conveyor 2 is provided on the furnace head preheating section 1, and a raw material inlet is provided on the screw conveyor 2, and a crude pyrolysis gas outlet is provided on the furnace head preheating section;

[0063] The pyrolysis section II of the rotary furnace body is mainly composed of a rotary inner cylinder and an outer thermal insulation layer. A flue 5 is arranged between the rotary inner cylin...

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Abstract

The invention discloses a process for integrally heated continuous preparing biomass pyrolysis gasification gas and a rotary furnace utilized by the same. At a furnace tail cooling section, red charcoal at a temperature of 600-800 DEG C after pyrolyzing and destructive distilling reacts with steam generated by cooling spray water on the lower portion in the furnace so as to absorb large quantities of heat and simultaneously generate water gas and semi-water gas. Heat generated by burning recycled gas and air is used for maintaining pyrolysis temperature of biomass material layers and providesenough heat for further, pyrolysis, destructive distillation and steam decomposition reaction. By aid of the heat, biomass inside the furnace is pyrolyzed and destructively distilled to generate large quantities of volatile matters, and the biomass is gradually heated to decompose destructive gas with high heat value. The rotary furnace utilizes a three-section design: a first section is a furnace head preheating section, which is mainly used for preheating and drying raw materials, a second section is a rotary furnace body pyrolysis section, which is mainly used for pyrolysis and destructivedistillation and is a core operation portion of the furnace, and a third section is a furnace tail cooling section, which is mainly used for cooling charcoal. Prepared gas is high in heat value, and devices occupy small space.

Description

technical field [0001] The invention relates to a biomass pyrolysis gasification process and equipment, in particular to a continuous pyrolysis gasification process and equipment suitable for a rotary furnace. Background technique [0002] Biomass pyrolysis refers to the thermal decomposition of biomass raw materials into condensable and non-condensable gases and solid carbon and other substances in different forms under the condition of isolating air or adding a small amount of air. N M 3 above), using the characteristics of high combustion temperature; biomass gasification refers to the gasification of solid carbon products and gasification agents (oxygen or oxidants of oxygen-containing substances, such as water vapor, oxygen or air, etc.) under certain temperature conditions. The process of solid reaction. At present, the biomass gasification reaction process that people refer to usually includes the thermal decomposition of biomass and the gas-solid reaction process, ...

Claims

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Application Information

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IPC IPC(8): C10J3/60C10B57/10C10B53/02
CPCY02E50/14Y02E50/10
Inventor 蒋剑春刘石彩应浩戴伟娣张天健许玉
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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