Biomass gasification generation system

A power generation system and biomass technology, applied in the direction of fuel oil system, gaseous engine fuel, granular/powdered fuel gasification, etc., can solve the problems of incomplete preheat recovery, low gasification efficiency, high energy consumption, etc., and achieve improved Raw material adaptability and the effect of improving energy utilization

Inactive Publication Date: 2012-04-18
HEFEI DEBO BIOENERGY SCI & TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that the preheating recovery is not complete, the energy consumption is large, and the overall gasification efficiency is low

Method used

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Effect test

Embodiment 1

[0024] The biomass raw material adopts wood chips with a water content of about 40%. After crushing and drying, the particle size is 6cm and the water content is 15%. It is added to the gasifier 4, and the air at 350°C preheated by the air preheater 12 is fed from the gasifier 4. The gasification furnace 4 is added at the bottom, and the high-temperature air and biomass undergo an efficient gasification reaction to generate high-temperature gas. The product undergoes gas-solid separation, and the unreacted residual carbon is collected and returned to the gasification furnace 4 through the feeding device for further reaction. The separated high-temperature gas enters the cyclone dust collector 7 for dust removal, and the gas cooled by the gas-flue gas heat exchanger 8 reaches 400°C. Using flue gas for energy recovery can prevent explosions when the gas-flue gas heat exchanger 8 leaks After being decoked, dedusted and further cooled by the purification device 9, the gas is sent t...

Embodiment 2

[0026] Biomass raw material adopts corn stalks with a water content of about 45%. After crushing and drying, the particle size is 4cm and the water content is 20%. It is added to the gasifier 4, and the air at 300°C is preheated by the air preheater for 12. 4 Add gasification furnace 4 at the bottom, high-temperature air and biomass undergo efficient gasification reaction to generate high-temperature gas, the product undergoes gas-solid separation, unreacted residual carbon is collected, and returns to gasification furnace 4 through the feeding device for further reaction . The separated high-temperature gas enters the cyclone dust collector 7 for dust removal, passes through the gas-flue gas heat exchanger 8, and the cooled gas reaches 400°C. Using flue gas for energy recovery can prevent gas-flue gas heat exchanger 8 from leaking Explosion, the gas is sent to the internal combustion generator set 10 to generate electricity after being decoked, dust removed and further cooled...

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Abstract

The invention discloses a biomass gasification generation system. In the system, biomass is crushed and dried and then enters a gasification furnace, the air which is preheated by an air preheater is injected in the gasification furnace from the bottom and then reacts with the biomass to generate high temperature gas, gas-solid separation is performed to the product, the unreacted carbon residue is collected and sent back to the gasification furnace through a returning device to further react, the separated high temperature gas enters a cyclone dust collector for dedusting and then enters a gas-flue gas heat exchanger, the cooled gas passes through a purification device to decoke, dedust and further cool, the gas passing through the purification device is sent to an internal combustion generating set to generate power, a part of high temperature flue gas discharged from the internal combustion generating set enters the air preheater to preheat the air, and the other part enters a waste heat boiler to generate steam. A part of low temperature flue gas from the air preheater and the waste heat boiler is used as the fluidized air of the returning device, the other part enters the gas-flue gas heat exchanger for heating, and the heated flue gas enters a drier to dry the biomass raw material. The biomass gasification generation system recycles the sensible heat of the high temperature gas to dry the biomass raw material and also recycles the sensible heat of the flue gas discharged from the internal combustion generating set to preheat air and generate steam, thus energy can be fully utilized; and the flue gas at the outlet of the internal combustion generating set is used as the fluidized air of the returning device to increase the operating stability of the gasification system.

Description

technical field [0001] The invention relates to a biomass gasification power generation system. Background technique [0002] my country is rich in biomass fuel resources, and vigorously developing biomass fuel resources will help improve my country's fossil fuel-based energy structure, which can not only reduce the emission of sulfide and nitrogen oxides, but also alleviate the greenhouse effect. Biomass gasification power generation technology has the advantages of flexible power generation, less investment, and high efficiency in small scale. However, in the existing biomass power generation technology, the overall energy utilization efficiency of the system is low and the fuel requirements are strict. Therefore, improving the system energy utilization rate and fuel adaptability can effectively improve the application range and benefits of biomass gasification power generation technology. [0003] Chinese invention patent 200910071440.5 discloses a biomass high-temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/20C10J3/48C10J3/84C10J3/66C10J3/86C10J3/72F02B43/08F02B63/04
CPCY02T10/32Y02T10/16Y02P20/129Y02T10/12Y02T10/30
Inventor 张守军鲁万宝赵成武
Owner HEFEI DEBO BIOENERGY SCI & TECH
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