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CN109266690A - A kind of method of organic waste anaerobism-pyrolysis coupling richness production capacity source gas - Google Patents

A kind of method of organic waste anaerobism-pyrolysis coupling richness production capacity source gas Download PDF

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Publication number
CN109266690A
CN109266690A CN201811055360.6A CN201811055360A CN109266690A CN 109266690 A CN109266690 A CN 109266690A CN 201811055360 A CN201811055360 A CN 201811055360A CN 109266690 A CN109266690 A CN 109266690A
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pyrolysis
anaerobic
organic waste
energy gas
waste
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刘鹏
王月
周政忠
郑涛
袁浩然
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Changzhou University
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Changzhou University
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
    • C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
    • C12P5/023—Methane
    • 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
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/133—Renewable energy sources, e.g. sunlight

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  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microbiology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biotechnology (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The present invention provides a kind of organic waste anaerobism-pyrolysis coupling richness production capacity source gas method, this method prepares the energy gas of high yield using anaerobic digestion techniques coupling pyrolytic technique.Using the solid residue after anaerobic digestion as raw material, inorganic waste 1-10% is added in pyrolytic process, and pyrolysis temperature is controlled at 600-800 DEG C, the energy gas that vinegar grain pyrolysis after Anaerobic Treatment generates improves 24% compared with vinegar grain, after inorganic waste is added, the energy gas for being pyrolyzed generation is directly pyrolyzed raising nearly 60% compared with vinegar grain.Energy gas yield not only can be improved in this method, and active path can also be provided for the resource utilization of inorganic waste, the butt reduction rate of vinegar grain is generally made to reach 85% or more.

Description

A kind of method of organic waste anaerobism-pyrolysis coupling richness production capacity source gas
Technical field
The invention belongs to solid waste recovery energies, biomass pyrolytic technical field, and in particular to a kind of organic waste Gurry anaerobism-pyrolysis coupling richness production capacity source gas method.
Background technique
Biomass energy is as uniquely containing the Renewable green energy of carbon resource, and widely distributed, source is sufficient, would be desirable energy The energy problem for solving to become increasingly conspicuous and environmental problem are gone in source selection, realize the diversification of energy resource supply, while can obtain height Added value chemicals.Organic solid waste is a kind of important biomass resource, and the solid particulate matter that traditional combustion generates causes Serious pollution effect China agricultural Green Development, green trans-utilization be field of renewable energy research hotspot it One.The available synthesis gas of organic solid waste pyrolytic gasification, methane, tar and residue, synthesis gas and methane are as energy source gas Body can be used as fuel and carry out combustion power generation or fuel cell power generation.Debirs higher for some organic matters such as kitchen Waste, wine vinegar waste, agricultural waste etc. usually realize recovery energy using anaerobic fermentation production biogas technology.However it is single Anaerobic fermentation technology can only partially handle debirs, obtained biogas residue will form secondary pollution.Life based on debirs Biogas residue after Anaerobic Treatment is passed through anaerobism-pyrolysis coupling technology as the raw material of pyrolytic reaction by drying by material composition Realize that its energy and resource utilization are optimal paths.
Inorganic wastes will be buried after coming out of the stove such as aluminium slag ash, flyash, biomass ash or soil-repairing agent uses, however The ingredients Biogenic validity for the lime-ash that these blast furnaces come out is poor, cannot be utilized by plant, often will form secondary dirt after burial It contaminates, rich in elements such as calcium, aluminium, potassium, sodium, silicon in these lime-ash, there is catalytic action to the cracking reaction of biomass, by these nothings Machine waste is as catalyst, and applied to the pyrolysis of debirs, its recycling application may be implemented.
Summary of the invention
Deficiency in terms of environmental problem and resource utilization that disposition based on the above solid waste occurs, the present invention mention A kind of method for having supplied organic waste anaerobism-pyrolysis coupling richness production capacity source gas.
Method includes the following steps:
(1) anaerobic fermentation tank is added together with inoculum and carries out anaerobic fermentation for organic waste of the solid content greater than 30% 30-40 days；
(2) after being separated by solid-liquid separation, biogas slurry flows back into the use of CSTR reactor cycles, and presses 1 for anaerobic digestion reaction discharging: New organic waste is added in the ratio of 1-1:3, carries out anaerobic fermentation reaction.
(3) solid residue that step (2) obtains passes through drying, is pyrolyzed into pyrolysis reactor.
Organic waste includes that the hemicellulose levels such as diet and kitchen wastes, wine vinegar waste, agricultural waste are higher in step (1) Debirs.
Anaerobic fermentation controls reaction temperature at 30-40 DEG C in step (1).
Anaerobic fermentation occurs to produce biogas reaction in step (1), obtains energy gas CH4。
Pyrolytic reaction controls temperature at 600-800 DEG C in step (3).
Inorganic waste (such as aluminium slag ash, flyash, biology are added in the ratio of 1-10% in pyrolytic reaction in step (3) Matter ash) it is used as catalyst.
Pyrolytic reaction obtains the energy gas of hydrogen-rich, and by-product high-performance charcoal adsorbent material in step (3).
Pyrolysis reactor is fixed bed, fluidized bed and ebullated bed in step (3).
Anaerobism of the present invention-pyrolysis coupling technology is the original using the solid residue after anaerobic pretreatment as pyrolysis Expect, it is some to be free on having around biomass macromolecular in anaerobic system by the effect of methane backeria in anaerobic fermentation process The hemicellulose of machine molecule (such as albumen, fat) and amorphous state occurs hydrolysis and generates biogas, remaining cellulose with Lignin cannot be utilized by anaerobic system, entered pyrolysis reactor after dry and utilized heat using inorganic wastes as catalyst Chemical method prepares H2、CH4, the energy gas such as CO be applied to power supply, heat supply and gas supply.It is advantageous that:
(1) anaerobism-pyrolysis coupling technology can reach 85% or more to the whole butt reduction rate of debirs.
(2) anaerobism-pyrolysis coupling technology effectively improves energy gas yield, by-product charcoal on the whole.
(3) after inorganic solid waste being added in pyrolytic process, energy gas yield can be improved nearly 60%.It may be implemented The energy and resource utilization of solid waste.
Detailed description of the invention
Fig. 1 anaerobism-pyrolysis coupling richness production capacity source gas process flow chart
In figure, 1- anaerobic fermentation, 2- is separated by solid-liquid separation, 3- dehydration and drying, 4- pyrolysis, 5- energy gas, 6- boiler, 7- power generation System, 8- gas purification system
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiment 1
A kind of method of organic waste anaerobism-pyrolysis coupling richness production capacity source gas, process flow chart is as shown in Figure 1, press It is carried out according to following operating procedure:
After debirs pass through anaerobic fermentation 1, biogas slurry and biogas residue are obtained by equipment for separating liquid from solid 2, biogas slurry, which is back to, detests Aerobe fermentation 1, raw material of the biogas residue as pyrolytic process obtain H into the pyrolysis of pyrolysis reactor 4 after dehydration and drying 32、CH4、CO Equal energy gas 5, pyrolysis water, tar and charcoal.Energy gas 5 can be delivered to 6 combustion heat supplying of gas fired-boiler, can also be defeated It send to electricity generation system 7 and generates electricity, may also pass through purification for gas 8 and obtain the H of high-purity2、CH4Gas source is provided Deng for user.
Embodiment 2
The original vinegar grain of solid holdup > 30% and inoculum are added vinegar grain anaerobism-pyrolysis coupling richness production capacity source gas method Anaerobic fermentation is carried out into anaerobic fermentation tank, is stirred continuously, and is uniformly mixed, is produced as 0.20-0.25m3/ kg methane, fermentation 30 After it, part vinegar residue is taken out, biogas slurry repeats the operation by being back in fermentor daily, the vinegar grain after obtaining anaerobism. Vinegar grain after anaerobism is crushed to 3mm and is pyrolyzed hereinafter, being put into fixed-bed pyrolysis reactor by uniformly mixed, dehydration and drying, heat Solution atmosphere is nitrogen atmosphere, and pyrolysis temperature is 600 DEG C.Pyrolysis obtains H2、CH4, the energy gas such as CO, gas yield is 45%, biology Charcoal yield is 36%, wherein energy gas (H2+CO+CH4) toatl proportion be 84%.Generally solid butt reduction rate is up to 85%, energy Source gas yield is up to 50%.
Vinegar grain is crushed to 3mm and is pyrolyzed hereinafter, being put into fixed-bed pyrolysis reactor by uniformly mixed, dehydration and drying, heat Solution atmosphere is nitrogen atmosphere, and pyrolysis temperature is 600 DEG C.Pyrolysis obtains H2、CH4, the energy gas such as CO, gas yield is 46%, biology Charcoal yield is 24%.Wherein energy gas (H2+CO+CH4) yield be 36%, solid butt reduction rate be 76%.
Embodiment 3
The original vinegar grain of solid holdup > 30% and inoculum are added vinegar grain anaerobism-pyrolysis coupling richness production capacity source gas method Anaerobic fermentation is carried out into anaerobic fermentation tank, is stirred continuously, is uniformly mixed, and 0.20-0.25m3/kg methane, fermentation 30 are produced as After it, part vinegar residue is taken out, biogas slurry repeats the operation by being back in fermentor daily, the vinegar grain after obtaining anaerobism. 5% aluminium slag ash is dehydrated and is added in the vinegar grain that is crushed to after 3mm anaerobism below, it is uniform by mechanical mixture, it is put into It is pyrolyzed in fixed-bed pyrolysis reactor, pyrolysis atmosphere is nitrogen atmosphere, and pyrolysis temperature is 600 DEG C.Pyrolysis obtains H2、CH4, CO etc. Energy gas, gas yield are 53%, and charcoal yield 38%, energy gas (H2+CO+CH4) toatl proportion is 90%.Generally Solid butt reduction rate is up to 84%, and energy gas yield is up to 56%.
Embodiment 4
The original vinegar grain of solid holdup > 30% and inoculum are added vinegar grain anaerobism-pyrolysis coupling richness production capacity source gas method Anaerobic fermentation is carried out into anaerobic fermentation tank, is stirred continuously, and is uniformly mixed, is produced as 0.20-0.25m3/ kg methane, fermentation 30 After it, part vinegar residue is taken out, biogas slurry repeats the operation by being back in fermentor daily, the vinegar grain after obtaining anaerobism. 10% aluminium slag ash is dehydrated and is added in the vinegar grain that is crushed to after 3mm anaerobism below, it is uniform by mechanical mixture, it is put into It is pyrolyzed in fixed-bed pyrolysis reactor, pyrolysis atmosphere is nitrogen atmosphere, and pyrolysis temperature is 600 DEG C.Pyrolysis obtains H2、CH4, CO etc. Energy gas, gas yield are 55%, and charcoal yield 42%, wherein energy gas (H2+CO+CH4) toatl proportion is 90%.Always Solid butt reduction rate is up to 82% on body, and energy gas yield is up to 56%.
The comparison from above-mentioned several embodiments is as can be seen that anaerobism-pyrolysis coupling can be to enable source gas yield by 36% 50% is increased to, solid butt reduction rate increases to 85% by 76%.After 5% aluminium slag ash is added, catalytic action is to generation Hydrogen significant reaction makes energy gas overall production rate increase to 56% by 50%.
Principle and application that embodiment of above is intended to be merely illustrative of the present and the exemplary embodiment used, But the present invention is not limited only to this.For others of ordinary skill in the art, the object of the invention is not being departed from Under real situation, the improvement and modification that can be made also are considered as within protection scope of the present invention.

Claims (8)

1.一种有机废弃物厌氧-热解耦合富产能源气体的方法，其特征在于，该方法包括以下步骤：A method for anaerobic-pyrolysis coupling rich energy gas of organic waste, characterized in that the method comprises the following steps: (1)固体含量大于30％的有机废弃物与接种物一起加入厌氧发酵罐进行厌氧发酵30-40天；(1) The organic waste having a solid content of more than 30% is added to the anaerobic fermentation tank together with the inoculum for anaerobic fermentation for 30-40 days; (2)厌氧消化反应出料经固液分离后，沼液回流进入CSTR反应器循环使用，并按1：1-1：3的比例加入新的有机废弃物，进行厌氧发酵反应。(2) After the anaerobic digestion reaction is separated by solid-liquid separation, the biogas slurry is refluxed into the CSTR reactor for recycling, and new organic waste is added in a ratio of 1:1-1:3 for anaerobic fermentation reaction. (3)步骤(2)得到的固体剩余物经过干燥，进入热解反应器热解。(3) The solid residue obtained in the step (2) is dried and then pyrolyzed into the pyrolysis reactor. 2.一种有机废弃物厌氧-热解耦合制备能源气体的方法，其特征在于，步骤(1)中有机废弃物包括餐厨废物、酿醋废物、农林废物等半纤维素含量较高的有机废物。2. A method for preparing an energy gas by anaerobic-pyrolysis coupling of organic waste, characterized in that organic waste in step (1) comprises high content of hemicellulose such as kitchen waste, vinegar waste, agricultural and forestry waste, etc. Organic waste. 3.一种有机废弃物厌氧-热解耦合制备能源气体的方法，其特征在于，步骤(1)中厌氧发酵控制反应温度在30-40℃。3. A method for preparing an energy gas by anaerobic-pyrolysis coupling of organic waste, characterized in that the reaction temperature of the anaerobic fermentation in step (1) is controlled at 30-40 °C. 4.一种有机废弃物厌氧-热解耦合制备能源气体的方法，其特征在于，步骤(1)中厌氧发酵发生产沼气反应，得到能源气体CH4。An anaerobic organic waste - Preparation of energy coupled pyrolysis gases, wherein, in step (1) is made anaerobic fermentation to produce biogas give energy gas CH 4. 5.一种有机废弃物厌氧-热解耦合制备能源气体的方法，其特征在于，步骤(3)中热解反应控制温度在600-800℃。A method for preparing an energy gas by anaerobic-pyrolysis coupling of organic waste, characterized in that the temperature of the pyrolysis reaction in step (3) is controlled at 600-800 °C. 6.一种有机废弃物厌氧-热解耦合制备能源气体的方法，其特征在于，步骤(3)中热解反应中按1-10％的比例添加无机废弃物(如铝渣灰、粉煤灰)作为催化剂。A method for preparing an energy gas by anaerobic-pyrolysis coupling of organic waste, characterized in that inorganic waste (such as aluminum ash and powder) is added in a proportion of 1-10% in the pyrolysis reaction in the step (3). Coal ash) as a catalyst. 7.一种有机废弃物厌氧-热解耦合制备能源气体的方法，其特征在于，步骤(3)中热解反应得到富氢的能源气体，并副产高性能生物炭吸附材料。7. A method for preparing an energy gas by anaerobic-pyrolysis coupling of organic waste, characterized in that in the step (3), the pyrolysis reaction obtains a hydrogen-rich energy gas, and the high-performance biochar adsorbent material is produced by-product. 8.一种有机废弃物厌氧-热解耦合制备能源气体的方法，其特征在于，步骤(3)中热解反应器为固定床、流化床与沸腾床。8. A method for preparing an energy gas by anaerobic-pyrolysis coupling of organic waste, characterized in that the pyrolysis reactor in step (3) is a fixed bed, a fluidized bed and a bubbling bed.
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Cited By (5)

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CN110302756A (en) * 2019-07-05 2019-10-08 常州大学 A method for removing heavy metal ions by using industrial waste modified biochar
CN110976487A (en) * 2019-12-24 2020-04-10 江苏筑原生物科技研究院有限公司 Method for improving hydrogen yield by catalytic pyrolysis of organic solid waste by using industrial waste residues
CN112795596A (en) * 2021-01-29 2021-05-14 生帆 Method for preparing hydrocarbon compound by using biomass material
CN113755532A (en) * 2021-10-09 2021-12-07 沈阳航空航天大学 Method for coproduction of biogas, oil and carbon by anaerobic fermentation of kitchen waste and straw pyrolysis
CN114990165A (en) * 2022-05-26 2022-09-02 沈阳航空航天大学 A method for iron and steel smelting dust and mud ash to strengthen the anaerobic digestion of kitchen waste to produce methane

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110302756A (en) * 2019-07-05 2019-10-08 常州大学 A method for removing heavy metal ions by using industrial waste modified biochar
CN110302756B (en) * 2019-07-05 2022-05-24 常州大学 Method for removing heavy metal ions by using industrial waste residue modified biochar
CN110976487A (en) * 2019-12-24 2020-04-10 江苏筑原生物科技研究院有限公司 Method for improving hydrogen yield by catalytic pyrolysis of organic solid waste by using industrial waste residues
CN112795596A (en) * 2021-01-29 2021-05-14 生帆 Method for preparing hydrocarbon compound by using biomass material
CN113755532A (en) * 2021-10-09 2021-12-07 沈阳航空航天大学 Method for coproduction of biogas, oil and carbon by anaerobic fermentation of kitchen waste and straw pyrolysis
CN114990165A (en) * 2022-05-26 2022-09-02 沈阳航空航天大学 A method for iron and steel smelting dust and mud ash to strengthen the anaerobic digestion of kitchen waste to produce methane

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Application publication date: 20190125