CN105419829A - Method for preparing biomass gas by pyrolyzing chicory residues - Google Patents
Method for preparing biomass gas by pyrolyzing chicory residues Download PDFInfo
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- CN105419829A CN105419829A CN201510648232.2A CN201510648232A CN105419829A CN 105419829 A CN105419829 A CN 105419829A CN 201510648232 A CN201510648232 A CN 201510648232A CN 105419829 A CN105419829 A CN 105419829A
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- witloof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The invention provides a method for preparing biomass gas by pyrolyzing chicory residues. The method comprises the steps of: (1) drying the chicory residues; (2) mixing the dried chicory residues with a pyrolysis catalyst to obtain a reaction mixture, wherein the pyrolysis catalyst is a mixture of iron oxide and sodium carbonate; (3) putting the reaction mixture in a reaction kettle, raising the temperature to 400-700 DEG C at 20-50 DEG C/min, and performing pyrolysis for 0.1-3 hours; and (4) separating biomass charcoal from a solid phase product and separating biomass gas from a gas phase product. The method provided by the invention effectively reduces waste discharge in a chicory powder production process, protects the natural environment, and reduces the pyrolyzing energy consumption of the chicory residues. The produced biomass gas is high in calorific value and is suitable for being popularized and applied.
Description
Technical field
The invention belongs to biomass energy technology field, be specifically related to a kind of method that pyrolysis witloof residue prepares biogas.
Background technology
Along with the fast development of world economy, the spending rate of Energy resources also increases rapidly, and the traditional fossil energy resources such as coal, oil, Sweet natural gas are day by day exhausted, and the mankind are in the urgent need to developing reproducible Energy resources to supplement and to substitute existing fossil energy.Biomass energy, as important eco-friendly renewable energy source, is subject to attention both domestic and external, is regarded as the fourth-largest energy after coal, oil and natural gas.
Biomass material can be converted into the geseous fuel based on CO and H by biomass pyrogenation gasification, directly can change the supply realizing combustion gas, heat energy and electric energy.Combustion gas simultaneously can pass through methanation, and then prepares high-quality biological matter synthetic natural gas (Bio-SNG), is the important technology approach of biomass energy exploitation.China's Biomass Energy Resources reserves are huge, and only agricultural crop straw about 700,000,000 t/a, amounts to standard coal and be about 300,000,000 t/a; The whole nation can provide 3.3 hundred million t forests biological every year, is equivalent to the standard coal of 200,000,000 t.If these biomass resources are converted into gas combustion by pyrolytic gasification, a large amount of fossil energies can be replaced, alleviate China to the interdependency of conventional energy resources.Meanwhile, biomass utilization is a part for natural carbon cycle, realizes the zero release of CO in process, belongs to renewable clean fuel.
20 century 70s start, and the exploitation of biomass energy research has become international popular research topic, and abroad especially the scientific research personnel of developed country has done a large amount of work in association area.There is biomass power generation plant more than 350 in the U.S., be distributed in paper pulp, paper product source mill and other Forest products source mill, main research adopts biomass combined cycle generation (B/IGCC), the total installation of generating capacity of biomass power generation is more than 10000M, single-machine capacity reaches 10 ~ 25MW, and generating total amount has reached more than 40% of the installation of U.S. renewable energy power generation, 4% of primary energy consumption amount.Germany has the biomass of more than 140 region cogeneration at present, in addition nearly 80 are had to be in planning and design or to build rank, the down-draft type gasifying furnace one oil-electric engine group system that the special energy company (ImbertEnergietechnikGMBH) of mattress Bel manufactures and designs, gasification efficiency can reach 60%-90%, and fuel gases calorific value is 1.7 ten thousand ~ 2.5 ten thousand Kj/m.Finland utilizes the biomass power generation such as forest trimmings, papermaking waste the most successfully one of country in the world, Foster Weiler company is maximum energy company of Finland, mainly utilize wood-processing industry, the waste of paper-making industry is fuel, the maximum water content of waste can reach 60%, the thermo-efficiency of unit can reach 88%, first, the available biomass power generation power of the assembling unit is 3-47M to the Technology of Circulating Fluidized Bed Boiler of manufactured biomass burning.Sweden and Denmark are carrying out the planning utilizing its abundant biomass to carry out cogeneration, make biomass energy while providing higher-grade electric energy, meet the requirement of heat supply, in the energy that Sweden's district heating and cogeneration consume, biomass energy ratio is more than 26%E5J.
Main component due to jerusalem artichoke, witloof residue is biomass, is translated into inflammable gas effective constituent will be made to be utilized by the method for pyrolysis or gasification, also effectively can solve simultaneously and rot to make formed environmental pollution.But jerusalem artichoke, witloof residue water ratio are higher, carry out depth drying with conventional pyrolytic technique to it, energy consumption is excessive.For this reason, newly pyrolytic process effectively disposes jerusalem artichoke, witloof biomass residue realizes energy-conserving and environment-protective to need to provide one.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of pyrolysis witloof residue to prepare the method for biogas.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Pyrolysis witloof residue prepares a method for biogas, comprises the steps:
(1) to witloof slag drying treatment;
(2) mixed with pyrolysis catalysts by dried witloof slag, obtain reaction mixture, described pyrolysis catalysts is the mixture of ferric oxide and sodium carbonate;
(3) reaction mixture is placed in reactor, is warming up to 400 ~ 700 DEG C, pyrolysis 0.1 ~ 3h with 20 ~ 50 DEG C/min;
(4) separating biomass charcoal from solid product, separating biomass gas from gas-phase product.
In step (1), described witloof slag is the industrial waste being rich in biomass remaining after utilizing witloof to extract inulin.
In step (1), described drying treatment is divided into two stages, and the first stage first extrudes witloof slag, and witloof pulp water is divided and is reduced to less than 70%, subordinate phase utilizes superheat steam drying, makes the moisture of witloof slag near less than 50%.
In step (2), the blending ratio of witloof slag and pyrolysis catalysts is 10:0.1 ~ 2, preferred 10:0.5 ~ 1 of blending ratio of witloof slag and pyrolysis catalysts, most preferably 10:0.5.
In step (2), in the mixture of described ferric oxide and sodium carbonate, the ratio of ferric oxide and sodium carbonate is 3:1.
In step (3), the pressure in reactor is 1.5 ~ 2MPa.
In step (3), be warming up to 450 DEG C with 35 DEG C/min, pyrolysis 30min.
The middle temperature flue gas produced in step (3) reactor is used as the thermal source to the drying treatment of witloof slag in step (1).
Beneficial effect:
(1) in the present invention by carrying out pyrolysis processing to witloof slag remaining in inulin production process, effectively reduce waste discharge, protect physical environment.
(2) the present invention effectively reduces energy consumption in witloof slag drying process by two step desiccating methods.
(3) the present invention adds ferric oxide and sodium carbonate two kinds of catalyzer in witloof slag pyrolytic process, effectively improves the pyrolysis efficiency of witloof slag.
(4) the present invention also proposes flue gas recirculation warm in reactor to utilize, and reduces the energy consumption in pyrolytic process further, is conducive to energy-saving and emission-reduction.
Embodiment
According to following embodiment, the present invention may be better understood.But those skilled in the art will readily understand, the content described by embodiment only for illustration of the present invention, and should can not limit the present invention described in detail in claims yet.
Main component due to jerusalem artichoke, witloof residue is biomass, is translated into inflammable gas effective constituent will be made to be utilized by the method for pyrolysis or gasification, also effectively can solve simultaneously and rot to make formed environmental pollution.
Embodiment 1: pyrolysis catalysts is on the impact of pyrolysis efficiency.
(1) utilize witloof to extract inulin, the witloof slag obtained, first utilizes plate-and-frame filter press to extrude it, makes the moisture content of witloof slag reduce to less than 70%, then utilizes superheat steam drying, time witloof slag moisture near less than 50%.
(2) mixed with pyrolysis catalysts by dried witloof slag, pyrolysis catalysts is that ferric oxide mixes by 1:3 with the mixture of sodium carbonate, and the blending ratio of witloof slag and pyrolysis catalysts is as shown in table 1.
(3) in a kettle., be warming up to 450 DEG C with 35 DEG C/min, pyrolysis 0.5h, the pressure in reactor is 1.5MPa, the biomass charcoal obtained and the Performance Detection of biogas as shown in the table:
Table 1 pyrolysis catalysts is on the impact of pyrolysis efficiency
Embodiment 2: pyrolysis temperature is on the impact of pyrolysis efficiency.
(1) utilize witloof to extract inulin, the witloof slag obtained, first utilizes plate-and-frame filter press to extrude it, makes the moisture content of witloof slag reduce to less than 70%, then utilizes superheat steam drying, time witloof slag moisture near less than 50%.
(2) dried witloof slag is mixed by 10:0.5 with pyrolysis catalysts, pyrolysis catalysts be ferric oxide and sodium carbonate by 1:3.
(3) in a kettle., be warming up to 400 ~ 700 DEG C with 35 DEG C/min, pyrolysis 0.5h, the pressure in reactor is that the Performance Detection of the biomass charcoal that obtains of 1.5MPa and biogas is as shown in the table:
Table 2 pyrolysis temperature is on the impact of pyrolysis efficiency
Embodiment 3: pyrolysis time is on the impact of pyrolysis efficiency.
(1) utilize witloof to extract inulin, the witloof slag obtained, first utilizes plate-and-frame filter press to extrude it, makes the moisture content of witloof slag reduce to less than 70%, then utilizes superheat steam drying, time witloof slag moisture near less than 50%.
(2) dried witloof slag is mixed by 10:0.5 with pyrolysis catalysts, pyrolysis catalysts be ferric oxide and sodium carbonate by 1:3.
(3) in a kettle., be warming up to 450 DEG C with 35 DEG C/min, pyrolysis 0.5 ~ 3h, the pressure in reactor is that the Performance Detection of the biomass charcoal that obtains of 1.5MPa and biogas is as shown in the table:
Table 3 pyrolysis temperature is on the impact of pyrolysis efficiency
Embodiment 4: synthesis pressure is on the impact of pyrolysis efficiency.
(1) utilize witloof to extract inulin, the witloof slag obtained, first utilizes plate-and-frame filter press to extrude it, makes the moisture content of witloof slag reduce to less than 70%, then utilizes superheat steam drying, time witloof slag moisture near less than 50%.
(2) dried witloof slag is mixed by 10:0.5 with pyrolysis catalysts, pyrolysis catalysts be ferric oxide and sodium carbonate by 1:3.
(3) in a kettle., be warming up to 450 DEG C with 35 DEG C/min, pyrolysis 0.5 ~ 3h, the pressure in reactor is that the Performance Detection of the biomass charcoal that obtains of 1.5 ~ 2MPa and biogas is as shown in the table:
Table 4 synthesis pressure is on the impact of pyrolysis efficiency
Claims (8)
1. pyrolysis witloof residue prepares a method for biogas, it is characterized in that, comprises the steps:
(1) to witloof slag drying treatment;
(2) mixed with pyrolysis catalysts by dried witloof slag, obtain reaction mixture, described pyrolysis catalysts is the mixture of ferric oxide and sodium carbonate;
(3) reaction mixture is placed in reactor, is warming up to 400 ~ 700 DEG C, pyrolysis 0.1 ~ 3h with 20 ~ 50 DEG C/min;
(4) separating biomass charcoal from solid product, separating biomass gas from gas-phase product.
2. pyrolysis witloof residue according to claim 1 prepares the method for biogas, it is characterized in that, in step (1), described witloof slag is the industrial waste being rich in biomass remaining after utilizing witloof to extract inulin.
3. pyrolysis witloof residue according to claim 1 prepares the method for biogas, it is characterized in that, in step (1), described drying treatment is divided into two stages, first stage first extrudes witloof slag, witloof pulp water is divided and is reduced to less than 70%, subordinate phase utilizes superheat steam drying, makes the moisture of witloof slag be down to less than 50%.
4. pyrolysis witloof residue according to claim 1 prepares the method for biogas, it is characterized in that, in step (2), the blending ratio of witloof slag and pyrolysis catalysts is 10:0.1 ~ 2.
5. pyrolysis witloof residue according to claim 1 prepares the method for biogas, it is characterized in that, in step (2), in the mixture of described ferric oxide and sodium carbonate, the ratio of ferric oxide and sodium carbonate is 3:1.
6. pyrolysis witloof residue according to claim 1 prepares the method for biogas, it is characterized in that, in step (3), the pressure in reactor is 1.5 ~ 2MPa.
7. pyrolysis witloof residue according to claim 1 prepares the method for biogas, it is characterized in that, in step (3), is warming up to 450 DEG C with 35 DEG C/min, pyrolysis 30min.
8. pyrolysis witloof residue according to claim 1 prepares the method for biogas, it is characterized in that, the middle temperature flue gas produced in step (3) reactor is used as the thermal source to the drying treatment of witloof slag in step (1).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097077A (en) * | 2018-10-19 | 2018-12-28 | 上海理工大学 | A kind of method of CO yield in reduction catalytic pyrolysis of biomass |
| CN110699141A (en) * | 2019-10-10 | 2020-01-17 | 中南大学 | Chain grate-rotary kiln injected biomass fuel and preparation method and application thereof |
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| EP0221679A2 (en) * | 1985-10-04 | 1987-05-13 | Arizona Board Of Regents | Process of producing liquid hydrocarbon fuels from biomass |
| CN101264879A (en) * | 2008-04-22 | 2008-09-17 | 东南大学 | Method for preparing biomass conductive charcoal |
| CN102574114A (en) * | 2009-04-22 | 2012-07-11 | 科伊奥股份有限公司 | Controlled activity pyrolysis catalysts |
| CN104194808A (en) * | 2014-08-08 | 2014-12-10 | 南京理工大学 | Method for catalytic pyrolysis of rice hulls |
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2015
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Patent Citations (4)
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| EP0221679A2 (en) * | 1985-10-04 | 1987-05-13 | Arizona Board Of Regents | Process of producing liquid hydrocarbon fuels from biomass |
| CN101264879A (en) * | 2008-04-22 | 2008-09-17 | 东南大学 | Method for preparing biomass conductive charcoal |
| CN102574114A (en) * | 2009-04-22 | 2012-07-11 | 科伊奥股份有限公司 | Controlled activity pyrolysis catalysts |
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| 陈洪章: "《生物质科学与工程》", 31 March 2008 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097077A (en) * | 2018-10-19 | 2018-12-28 | 上海理工大学 | A kind of method of CO yield in reduction catalytic pyrolysis of biomass |
| CN110699141A (en) * | 2019-10-10 | 2020-01-17 | 中南大学 | Chain grate-rotary kiln injected biomass fuel and preparation method and application thereof |
| CN110699141B (en) * | 2019-10-10 | 2021-08-20 | 中南大学 | Chain grate-rotary kiln injected biomass fuel and preparation method and application thereof |
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Effective date of registration: 20200214 Address after: 518000 floor 28-03, Weisheng technology building, No. 9966, Shennan Avenue, Maling community, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen hualikang fiber Biotechnology Co., Ltd Address before: 810016, 10, No. four, biological park, Xining, Qinghai Patentee before: WEIDE (QINGHAI) BIOTECHNOLOGY CO., LTD. |
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