CN108865271A - The oxygen gasified method for preparing medium calorific value gas of wood material - Google Patents
The oxygen gasified method for preparing medium calorific value gas of wood material Download PDFInfo
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- CN108865271A CN108865271A CN201811024540.8A CN201811024540A CN108865271A CN 108865271 A CN108865271 A CN 108865271A CN 201811024540 A CN201811024540 A CN 201811024540A CN 108865271 A CN108865271 A CN 108865271A
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- calorific value
- oxygen
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- wood material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
- C10J2300/092—Wood, cellulose
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The oxygen gasified method for preparing medium calorific value gas of wood material, wood material in fixed-bed gasification furnace vaporizing system for combustion gas, oxygen is passed through fixed-bed gasification furnace as gasifying medium, under the conditions of oxygen equivalents are than 0.21 ~ 0.33, gasification reaction occurs in fixed-bed gasification furnace, reaction gained combustion gas carries out gas solid separation through separation equipment, and high-temperature fuel gas passes through condensation cooling again, obtains clean medium calorific value gas.Preparation method provided by the invention, obtained fuel gases calorific value is high, can be used for various Industrial Stoves, or further synthetic liquid fuel etc., effectively expands the application range of combustion gas.
Description
Technical field
The present invention relates to biomass gasification technology more particularly to the oxygen gasified methods for preparing medium calorific value gas.
Background technique
World energy sources are mainly taken from the non-renewable energy resources such as fossil energy (petroleum, natural gas and coal) at present；With
The development of social economy, the demand to the energy are also growing.People largely exploit and use causes fossil energy etc. is non-can
Regenerated resources storage capacity is in short supply, and at the same time, environmental pollution has become increasingly serious for the carbon emission bring of fossil energy, emission reduction tasks
It is quite arduous.Biomass energy has the characteristics that reproducibility, low pollution, widely distributed property, total amount are rich, current many states
Family is all being actively researched and developed using biomass energy.There is carbon dioxide zero discharge characteristic during biomass economy, burn
SOx, NOx and dust emissions amount are less than fossil fuel afterwards, are a kind of clean fuels.
Biomass energy utilization technologies are using biomass as raw material by energy conversion manufacture high-grade gaseous fuel and liquid
Fuel converts clean high-grade gaseous fuel and liquid fuel as the substitution energy of fossil fuel for recyclable organism mass-energy
Source is used for electric power, communications and transportation, town gas etc., so that the mankind is got rid of the dependence to limited fossil fuel resource, substantially
Degree reduces the discharge amount of atmosphere pollution and greenhouse gases.
Gasification of biomass is using biomass as raw material, with oxygen (free oxygen, in conjunction with oxygen), air, vapor, vapor-
Oxygen mixture or hydrogen are that gasifying agent keeps relative molecular mass in biomass higher under the conditions of high temperature imperfect combustion
Organic hydrocarbon compounds occur chain cracking and complicated thermal chemical reaction occur with gasifying agent and to generate relative molecular weight lower
The process of the imflammable gas such as carbon monoxide, hydrogen, methane.Biomass gasification technology can turn the lower biomass of utilization efficiency
Be melted into the higher combustible gas of utilization efficiency, gaseous fuel be easy to pipeline, high combustion efficiency, combustion process it is easily controllable, combustion
Burner tool is relatively simple, no granular material discharged, is the higher fuel of taste.Oxygen gasified one kind as gasification technology, instead
It answers principle identical as air gasification, but compared with air gasification, reduces inert gas N in gasification2Content, increase original
Material and the contact probability of oxygen, accelerate gasification reaction speed, can significantly improve gasification efficiency and unit volume output combustion gas
Calorific value.In addition, CO, H in gasification output combustion gas2Content is higher, is conducive to effectively expand in further synthetic liquid fuel etc.
The application range of biological fuel gas.
Summary of the invention
The technical issues of solution：The present invention provides a kind of wood material the oxygen gasified method for preparing medium calorific value gas, institute
Fuel gases calorific value obtained is high, can be used for various Industrial Stoves, or further synthetic liquid fuel etc., effectively expands the application of combustion gas
Range.
Technical solution：The oxygen gasified method for preparing medium calorific value gas of wood material, wood material is in fixed-bed gasification furnace
Middle vaporizing system is passed through fixed-bed gasification furnace as gasifying medium for combustion gas, oxygen, under the conditions of oxygen equivalents are than 0.21~0.33,
Gasification reaction occurs in fixed-bed gasification furnace, reaction gained combustion gas carries out gas solid separation through separation equipment, and high-temperature fuel gas passes through again
Condensation cooling, obtains clean medium calorific value gas.Effective supply amount of oxygen and raw material when oxygen equivalents are than indicating oxygen gasified
Completely burned theoretically needed for the ratio between amount of oxygen.
The gasification temperature of above-mentioned fixed-bed gasification furnace is 800~950 DEG C.
Preferably, the gasification temperature of above-mentioned fixed-bed gasification furnace is 900 DEG C.
Above-mentioned wood material is wood chip or sawdust.
The fuel gases calorific value of above-mentioned preparation is 8.99~13.28MJ/m3。
Preferably, above-mentioned gasification temperature is 900 DEG C, and oxygen equivalents are than 0.24, fuel gases calorific value 13.14MJ/m3。
Beneficial effect：1. gasification reaction carries out at 800~950 DEG C, gasifying medium is oxygen, avoids air gasification N2
Combustion gas problem is diluted, fuel gases calorific value can reach 8.99~13.28MJ/m3。
2. the factor of created gase and gasification reaction speed of combustion gas can be improved in the gasification reaction of oxygen and charcoal using oxygen as gasifying medium
Rate.
3. using oxygen as gasifying medium, oxygen equivalents ratio is 0.21~0.33, in certain temperature range, optimal oxygen
Equivalent proportion is 0.24, fuel gases calorific value highest.
4. oxygen equivalents ratio is 0.21~0.33, optimal gasification temperature is 900 DEG C, and fuel gases calorific value is 13.14MJ/ at this time
m3, H in combustion gas2Volume fraction is that 17.64%, CO volume fraction is 39.78%, CH4Volume fraction is 12.45%, C2HnVolume
Score is 2.76%.
5. CO, H in the combustion gas that the present invention obtains2Content is higher, can further synthetic liquid fuel etc., effectively expansion fire
The application range of gas.
Specific embodiment
In order to better understand the present invention, it is further illustrated below with reference to specific example.Unless otherwise specified, embodiment
Used in the conventional means that are well known to those skilled in the art of technological means.
Embodiment 1
The oxygen gasified method for preparing medium calorific value gas of wood material, wood material vaporizing system in fixed-bed gasification furnace are standby
Combustion gas, oxygen are passed through fixed-bed gasification furnace as gasifying medium, under different oxygen equivalents ratios, gasify in fixed-bed gasification furnace
Reaction, reaction gained combustion gas carry out gas solid separation through separation equipment, and high-temperature fuel gas passes through condensation cooling again, obtains clean combustion
Gas.
The key reaction that wood material occurs in fixed-bed gasification furnace is as follows：
Biomass+oxygen → H2+CO+CO2+CH4+ hydrocarbon
Tar → aH2+bCH4+cCO+dCO2+eH2O+fCnHm
C+1/2O2→CO
C+O2→CO2
C+2H2→CH4
C+CO2→2CO
C+H2O→CO+H2
CO+H2O→CO2+H2
CH4+H2O→CO+3H2
H2+1/2O2→H2O
2CO+O2→2CO2
800 DEG C of gasification temperature, for oxygen equivalents than 0.21~0.33, sawdust is oxygen gasified to the results are shown in Table 1, obtains from table,
With the increase of equivalent proportion, fuel gases calorific value is on a declining curve.Main cause is that gasification temperature is lower, and raw material does not participate in anti-completely
It answers, with the increase of equivalent proportion, the combustible component in combustion gas more participates in oxidation reaction, and combustible component is reduced, and leads to combustion gas
Calorific value decline.
For 1 sawdust of table at 800 DEG C of gasification temperature, oxygen equivalents descend gasification result than 0.21~0.33
Embodiment 2
850 DEG C of gasification temperature, for oxygen equivalents than 0.21~0.33, sawdust is oxygen gasified to the results are shown in Table 2, obtains from table,
With the increase of equivalent proportion, fuel gases calorific value is first increased and is reduced afterwards, when equivalent proportion is 0.24, fuel gases calorific value highest.
For 2 sawdust of table at 850 DEG C of gasification temperature, oxygen equivalents descend gasification result than 0.21~0.33
Embodiment 3
900 DEG C of gasification temperature, for oxygen equivalents than 0.21~0.33, sawdust is oxygen gasified to the results are shown in Table 3, obtains from table,
With the increase of equivalent proportion, fuel gases calorific value is first increased and is reduced afterwards, when equivalent proportion is 0.24, fuel gases calorific value highest.
For 3 sawdust of table at 900 DEG C of gasification temperature, oxygen equivalents descend gasification result than 0.21~0.33
Embodiment 4
Gasification temperature is at 950 DEG C, and for oxygen equivalents than 0.21~0.33, sawdust is oxygen gasified to the results are shown in Table 4, from table
Out, with the increase of equivalent proportion, fuel gases calorific value is first increased and is reduced afterwards, when equivalent proportion is 0.24, fuel gases calorific value highest.
For 4 sawdust of table in gasification temperature at 950 DEG C, oxygen equivalents descend gasification result than 0.21~0.33
Embodiment 5
Oxygen equivalents are than 0.27, and 800~950 DEG C of gasification temperature, sawdust is oxygen gasified to the results are shown in Table 5, obtain from table, when
When oxygen equivalents ratio is 0.27, with the raising of gasification temperature, fuel gases calorific value is in raised trend, after 900 DEG C, calorific value
Raising trend slows down.Temperature is higher, and energy consumption is bigger, comprehensively considers the energy consumption of fuel gases calorific value and system, gasification temperature is at 900 DEG C
It is more appropriate.
5 sawdust of table in oxygen equivalents than 0.27, gasification result at 800~950 DEG C of gasification temperature
Claims (6)
1. the oxygen gasified method for preparing medium calorific value gas of wood material, it is characterised in that：Wood material is in fixed-bed gasification furnace
Middle vaporizing system is passed through fixed-bed gasification furnace as gasifying medium for combustion gas, oxygen, under the conditions of oxygen equivalents are than 0.21 ~ 0.33,
Gasification reaction occurs in fixed-bed gasification furnace, reaction gained combustion gas carries out gas solid separation through separation equipment, and high-temperature fuel gas passes through again
Condensation cooling, obtains clean medium calorific value gas.
2. the oxygen gasified method for preparing medium calorific value gas of wood material according to claim 1, it is characterised in that described solid
The gasification temperature of fixed bed gasification furnace is 800 ~ 950 DEG C.
3. the oxygen gasified method for preparing medium calorific value gas of wood material according to claim 2, it is characterised in that described solid
The best gasification temperature of fixed bed gasification furnace is 900 DEG C.
4. the oxygen gasified method for preparing medium calorific value gas of wood material according to claim 1, it is characterised in that the wood
Matter raw material is wood chip or sawdust.
5. the oxygen gasified method for preparing medium calorific value gas of wood material according to claim 1, it is characterised in that the system
Standby fuel gases calorific value is 8.99 ~ 13.28MJ/m3。
6. the oxygen gasified method for preparing medium calorific value gas of wood material according to claim 1, it is characterised in that the gas
Changing temperature is 900 DEG C, and oxygen equivalents are optimal gasification condition than 0.24, and fuel gases calorific value is 13.14MJ/m at this time3。
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| CN201811024540.8A CN108865271A (en) | 2018-09-04 | 2018-09-04 | The oxygen gasified method for preparing medium calorific value gas of wood material |
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| CN201811024540.8A CN108865271A (en) | 2018-09-04 | 2018-09-04 | The oxygen gasified method for preparing medium calorific value gas of wood material |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1375540A (en) * | 2001-03-16 | 2002-10-23 | 中国林业科学研究院林产化学工业研究所 | Biomass internally circulating conic fluidized bed gasifying process and equipment |
| US20140109638A1 (en) * | 2011-07-25 | 2014-04-24 | Cool Planet Energy Systems, Inc. | Method for reducing the carbon footprint of a conversion process |
| CN106590746A (en) * | 2016-12-21 | 2017-04-26 | 天津大学 | Method for preparing low-tar biosynthetic gas by utilizing anaerobic fermentation residues |
-
2018
- 2018-09-04 CN CN201811024540.8A patent/CN108865271A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1375540A (en) * | 2001-03-16 | 2002-10-23 | 中国林业科学研究院林产化学工业研究所 | Biomass internally circulating conic fluidized bed gasifying process and equipment |
| US20140109638A1 (en) * | 2011-07-25 | 2014-04-24 | Cool Planet Energy Systems, Inc. | Method for reducing the carbon footprint of a conversion process |
| CN106590746A (en) * | 2016-12-21 | 2017-04-26 | 天津大学 | Method for preparing low-tar biosynthetic gas by utilizing anaerobic fermentation residues |
Non-Patent Citations (1)
| Title |
|---|
| 孟凡彬等: "高当量比生物质氧气气化试验研究", 《太阳能学报》 * |
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