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Process and apparatus for preparing coal gas by using bulky biomass materials

A technology for biomass raw materials and gas, which is applied in the petroleum industry, special forms of dry distillation, coke ovens, etc., can solve the problems of unsatisfactory use effect of fluffy biomass raw materials, large tar-containing sewage, secondary environmental pollution, etc. The effect of flying carbon amount, high production intensity and improving utilization rate

Inactive Publication Date: 2005-04-06
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic biomass gasification generally adopts a downdraft gasifier, which is more effective for the gasification of dense biomass raw materials, but not ideal for fluffy biomass raw materials.
For powdery materials such as sawdust and wood powder, there are reports of using an external circulating fluidized bed gasifier, but there are defects such as complex furnace structure and poor stability.
The purification of gas generally adopts wet process, and a large amount of tar-containing sewage is produced during the purification process, causing secondary pollution to the environment

Method used

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  • Process and apparatus for preparing coal gas by using bulky biomass materials
  • Process and apparatus for preparing coal gas by using bulky biomass materials
  • Process and apparatus for preparing coal gas by using bulky biomass materials

Examples

Experimental program
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Effect test

Embodiment 1

[0036] combined with figure 1 , 2, 3, the technique of the present invention is: fluffy type biomass raw material is pulverized into the fragment of 8-10mm with pulverizing device, is added into hopper 2 by lifting screw 1, is sent into built-in fast fluidized bed gas by screw feeder 3 again. The lower part of the gasification furnace 4; air is sent into the furnace from the air inlet 27, and the gasification reaction temperature is controlled at 800°C to 900°C by adjusting the amount of gasification air and the feeding speed of raw materials, and the amount of gasification air (Nm3) and raw material are controlled. The ratio of addition amount (kg) is 1.15. The fluidization gas velocity in the gasifier is 2.5m / s, and the biomass raw material is boiling in the gasifier and undergoes partial redox reaction with the gasification medium (air) to generate coal gas. The coal gas entrained with solid materials and ash enters the built-in cyclone separator 20, and the solid materia...

Embodiment 2

[0038] combined with figure 1 , 4 , 5, the technique of the present invention is: fluffy biomass raw material is pulverized into 3-5mm fragment with crushing device, is added into hopper 2 by lifting screw 1, is sent into built-in fast fluidized bed gas by screw feeder 3 again. The lower part of the gasification furnace 4; air is sent into the furnace from the air inlet 27, and the gasification reaction temperature is controlled at 700°C to 800°C by adjusting the amount of gasification air and the feeding speed of raw materials, and the amount of gasification air (Nm3) and raw material are controlled. The ratio of addition amount (kg) is 1.05. The fluidization gas velocity in the gasifier is 1.4m / s, and the biomass raw material is boiling in the gasifier and undergoes partial redox reaction with the gasification medium (air) to generate coal gas. The gas entrained with solid materials and ash enters the built-in cyclone separator 20, and the solid materials captured by the c...

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Abstract

The invention discloses a kind of use fluffy biology raw material preparation coal gas craft and the equipment. The craft including the raw material pretreatment, the raw material gasification, is divided the principle to leave the dregs, the coal gas purifies, the coal gas transportation step; The equipment including the raw material pretreatment system, the coal gas has the system, the coal gas purification system, the coal gas transportation storing system. In this invention uses sets at the type fast fluidized gasification furnace and furnace accessories to have the production intensity in a big way, the gasified efficiency high, the gas tar content low, the operation stability is good and so on the characteristic. The gasification responded completes under the physical strength transfer rate, in sets at in the type separator realization gasification stove fresh material raw material fast circulation, the coal gas purification uses the method which the laundering and the organic solvent washes unifies, has tar removing rate to be high, in the coal gas the tar content change undulates slightly and so on the characteristic. The invention craft and the equipment may continuously gasify the fluffy fresh material raw material, gasifies the coal gas which produces to be possible to serve as the fuel gas generator the gas source, also may pass the pipe network to all around the side inhabitant user air feed.

Description

technical field [0001] The invention relates to a process and equipment for preparing gas from biomass raw materials, in particular to a process for preparing gas from fluffy biomass raw materials, and also relates to a device for the process. Background technique [0002] Biomass in a broad sense refers to hydrocarbons produced by photosynthesis. According to the texture of biomass raw materials, biomass raw materials can be divided into two types: dense type and fluffy type: dense type biomass raw materials mainly include forest logging residues, sorghum, corn, cotton and other crop straws, and fluffy type biomass raw materials It mainly includes agricultural straw such as rice straw, wheat straw, and rice husk. my country is a large agricultural country, and the crops are mainly wheat and rice, so the fluffy biomass raw materials account for a considerable proportion of my country's biomass resources. [0003] How to efficiently and rationally develop and utilize fluffy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02
Inventor 张进平乔旭崔咪芬汤吉海
Owner NANJING TECH UNIV
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