CN104498532A - Process for producing methane by mixing and fermenting organic wastes - Google Patents

Process for producing methane by mixing and fermenting organic wastes Download PDF

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Publication number
CN104498532A
CN104498532A CN201510009847.0A CN201510009847A CN104498532A CN 104498532 A CN104498532 A CN 104498532A CN 201510009847 A CN201510009847 A CN 201510009847A CN 104498532 A CN104498532 A CN 104498532A
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CN
China
Prior art keywords
biogas
fermentation
produced
technique
organic waste
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Pending
Application number
CN201510009847.0A
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Chinese (zh)
Inventor
孙召丽
王朋
尉月丽
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Qingdao Lvse Jiayuan Environmental Equipment Co Ltd
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Qingdao Lvse Jiayuan Environmental Equipment Co Ltd
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Priority to CN201510009847.0A priority Critical patent/CN104498532A/en
Publication of CN104498532A publication Critical patent/CN104498532A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention discloses a process for producing methane by mixing and fermenting organic wastes. The process is characterized by comprising the following steps: pretreating materials generated by comprehensively sorting and screening household garbage, kitchen garbage, sludge and excrement; putting pretreated organic materials in an anaerobic reactor to prepare methane, separating solid and liquid of the fermented materials, storing 20-30% of methane liquid in a waste collecting pool of a plant area for returning and tempering. Compared with an anaerobic fermentation process of a single material, various organic materials can be comprehensively treated by the process; the problem of the insufficient raw materials of the existing single anaerobic fermentation engineering caused by urbanization can be avoided; meanwhile, the methane liquid returns, so that the water consumption of a system can be reduced, the performance of a fermentation system is improved, and the gas yield and the stability of the system are improved.

Description

The technique of biogas is produced in a kind of organic waste mixed fermentation
Technical field
The present invention relates to the treatment process that biogas is produced in a kind of organic waste mixed fermentation, belong to anaerobically fermenting field.
Background technology
Going from bad to worse of environment, there is a serious shortage in the supply for the energy, for waste anaerobically fermenting for means, the biogas engineering construction being target with clean energy production creates wide development space.Along with the quickening of Development of China's Urbanization, biogas construction combines with urbanization, and household biogas will weaken gradually, and industrial methane share increases gradually; Take agricultural wastes as dominant fermentation converting feedstock for organic waste mixing raw materials such as changing food waste, feces of livestock and poultry, agricultural waste material and digested sludges.Mixed fermentation can balance the nutritional status of fermentation system, the rheological properties optimizing fermentation system, the murder by poisoning factor that provides more excellent liquid natural pond, natural pond slag fertilizer, dilute some harm fermentation system stability issuable in single material fermentation process, anaerobic mixed fermentation can improve the treatment capacity of factor of created gase and organic waste simultaneously, improves the economy of biogas engineering.Therefore, mixed fermentation producing methane is a kind of mode of very promising process solid waste.
Mixed fermentation producing methane technology external at present is applied in engineering widely, defines perfect system, achieves good environment and economy benefit.And the anaerobic mixed fermentation producing methane technology of China is also in the starting stage, just there is correlative study to occur in recent years, also had further development space.
Summary of the invention
The object of this invention is to provide the technique that biogas is produced in a kind of organic waste mixed fermentation, by various organic materials comprehensive treating process, the problem of the existing single anaerobically fermenting engineering insufficient raw material that urbanization causes can be avoided.
The technique of biogas is produced in a kind of organic waste mixed fermentation of the present invention, and it is characterized in that, this treatment process comprises the pre-treatment to domestic garbage integrated separating screen underflow, changing food waste, mud and ight soil; Pretreated organic substance enters anaerobic reactor fermentation biogas, and the material after fermentation is through solid-liquid separation, and the natural pond liquid of 20-30% is stored in plant area, and to collect dirty pond modified for refluxing.
Further, described domestic garbage integrated separating screen underflow is sent into homogeneous tank through rotary conveyor, under the effect of mechanical stirring and hydraulic mixing, the materials such as sandstone fall into sand storage bin at the bottom of tank, deliver to grit water separator remove by air lift Sand pump; The tooth harrow dirt remover of the light material such as plastics, dried leaf through tank skin middle and upper part is removed, after integrated machine for sorting secondary sorting, slurrying, transport outward landfill; Liquid after removal of impurities flows into preparing pool.
Described changing food waste is discharged in the receiving hopper of integrated machine for sorting from refuse collector, and after broken, extruding, sorting and slurrying, inorganic slag charge is discharged from separator top slag-drip opening, directly transports outward landfill; Organic ink flows into surge tank after then removing the floating matters such as small plastics further through the mechanical grille bottom separator, after buffer memory, hydrocyclone desander is entered by high-pressure pump, carry out efficient desanding, after desanding, material enters damp and hot hydrolytic decomposition pot, through the laggard row oil-water separation system of damp and hot hydrolysis, remove the profit in slurries, the thick grease of extraction is unified Collection and conservation and is sold as outside industrial chemicals; Slurry after de-oiling enters preparing pool.
Described mud and ight soil are discharged in the receiving hopper of preparing pool, under the flushing of plant area's sewage and backflow biogas slurry, remove the floating matters such as large weeds through mechanical grille after, flow into preparing pool.
Further, pretreated material in described preparing pool, sending into anaerobic fermentation tank through stirring homogeneous by cutting pump, carrying out producing methane through anaerobic fermentation.
Further, after the biogas dehydration that anaerobically fermenting produces, enter biogas storage cabinet and keep in, do after delivering to methane purification system process after supercharging to sell outside CNG.
Further, after fermentation, material is kept in from flowing into natural pond liquid Buffer Pool, and after solid-liquid separation, the natural pond liquid of 20-30% is stored in plant area, and to collect dirty pond modified for refluxing.
Compared with single material anaerobic ferment process, the beneficial effect that the present invention produces is, can by various organic materials comprehensive treating process, avoid the problem of the existing single anaerobically fermenting engineering insufficient raw material that urbanization causes, natural pond liquid backflow simultaneously can reduce the water consumption of system, improve the performance of fermentation system, improve system factor of created gase and stability.
Accompanying drawing explanation
Fig. 1. the process flow sheet of biogas is produced in mixed fermentation of the present invention.
Embodiment
Below in conjunction with the drawings and the specific embodiments, set forth the present invention further.
(1) domestic garbage integrated separating screen underflow sends into homogeneous tank through rotary conveyor, and under the effect of mechanical stirring and hydraulic mixing, the materials such as sandstone fall into sand storage bin at the bottom of tank, delivers to grit water separator remove by air lift Sand pump; The tooth harrow dirt remover of the light material such as plastics, dried leaf through tank skin middle and upper part is removed, after integrated machine for sorting secondary sorting, slurrying, transport outward landfill; Liquid after removal of impurities flows into preparing pool.
(2) changing food waste is discharged in the receiving hopper of integrated machine for sorting from refuse collector, and after broken, extruding, sorting and slurrying, inorganic slag charge is discharged from separator top slag-drip opening, directly transports outward landfill; Organic ink flows into surge tank after then removing the floating matters such as small plastics further through the mechanical grille bottom separator, after buffer memory, hydrocyclone desander is entered by high-pressure pump, carry out efficient desanding, after desanding, material enters damp and hot hydrolytic decomposition pot, through the laggard row oil-water separation system of damp and hot hydrolysis, remove the profit in slurries, the thick grease of extraction is unified Collection and conservation and is sold as outside industrial chemicals; Slurry after de-oiling enters preparing pool.
(3) mud and ight soil are discharged in the receiving hopper of preparing pool, under the flushing of plant area's sewage and backflow biogas slurry, remove the floating matters such as large weeds through mechanical grille after, flow into preparing pool.
(4) pretreated material in preparing pool, sending into anaerobic fermentation tank through stirring homogeneous by cutting pump, carrying out producing methane through anaerobic fermentation.
(5), after the biogas dehydration that anaerobically fermenting produces, enter biogas storage cabinet and keep in, do after delivering to methane purification system process after supercharging to sell outside CNG.
(6) after fermentation, material is kept in from flowing into natural pond liquid Buffer Pool, and after solid-liquid separation, the natural pond liquid of 20-30% is stored in plant area, and to collect dirty pond modified for refluxing.

Claims (7)

1. a technique for biogas is produced in organic waste mixed fermentation, and it is characterized in that, this treatment process comprises the pre-treatment to domestic garbage integrated separating screen underflow, changing food waste, mud and ight soil; Pretreated organic substance enters anaerobic reactor fermentation biogas, and the material after fermentation is through solid-liquid separation, and the natural pond liquid of 20%-30% is stored in plant area, and to collect dirty pond modified for refluxing.
2. the technique of biogas is produced in a kind of organic waste mixed fermentation according to claim 1, it is characterized in that, described domestic refuse screen underflow sends into homogeneous tank through rotary conveyor, under the effect of mechanical stirring and hydraulic mixing, the materials such as sandstone fall into sand storage bin at the bottom of tank, deliver to grit water separator remove by air lift Sand pump; The tooth harrow dirt remover of the light material such as plastics, dried leaf through tank skin middle and upper part is removed, after integrated machine for sorting secondary sorting, slurrying, transport outward landfill; Liquid after removal of impurities flows into preparing pool.
3. the technique of biogas is produced in a kind of organic waste mixed fermentation according to claim 1, it is characterized in that, described changing food waste is discharged in the receiving hopper of integrated machine for sorting from refuse collector, after broken, extruding, sorting and slurrying, inorganic slag charge is discharged from separator top slag-drip opening, directly transports outward landfill; Organic ink flows into surge tank after then removing the floating matters such as small plastics further through the mechanical grille bottom separator, after buffer memory, hydrocyclone desander is entered by high-pressure pump, carry out efficient desanding, after desanding, material enters damp and hot hydrolytic decomposition pot, through the laggard row oil-water separation system of damp and hot hydrolysis, remove the profit in slurries, the thick grease of extraction is unified Collection and conservation and is sold as outside industrial chemicals; Slurry after de-oiling enters preparing pool.
4. the technique of biogas is produced in a kind of organic waste mixed fermentation according to claim 1, it is characterized in that, described mud and ight soil are discharged in the receiving hopper of preparing pool, under the flushing of plant area's sewage and backflow biogas slurry, remove the floating matters such as large weeds through mechanical grille after, flow into preparing pool.
5. the technique of biogas is produced in a kind of organic waste mixed fermentation according to Claims 2 or 3 or 4, it is characterized in that, the material in described preparing pool, sending into anaerobic fermentation tank, carrying out producing methane through anaerobic fermentation through stirring homogeneous by cutting pump.
6. the technique of biogas is produced in a kind of organic waste mixed fermentation according to claim 5, it is characterized in that, after the biogas dehydration that anaerobically fermenting produces, enters biogas storage cabinet and keeps in, do to sell outside CNG after supercharging after delivering to methane purification system process.
7. the technique of biogas is produced in a kind of organic waste mixed fermentation according to claim 5, it is characterized in that, after fermentation, material is kept in from flowing into natural pond liquid Buffer Pool, and after solid-liquid separation, it is modified for refluxing that the natural pond liquid of 20-30% collects dirty pond stored in plant area.
CN201510009847.0A 2015-01-09 2015-01-09 Process for producing methane by mixing and fermenting organic wastes Pending CN104498532A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104789467A (en) * 2015-04-17 2015-07-22 郑州宇通环保科技有限公司 Anaerobic-digestion treatment device for food wastes
CN105087656A (en) * 2015-09-21 2015-11-25 七台河宝泰隆煤化工股份有限公司 Method for preparing LNG by adopting straw
CN105132057A (en) * 2015-09-21 2015-12-09 七台河宝泰隆煤化工股份有限公司 Method for preparing LNG through biomass
CN105289069A (en) * 2015-10-16 2016-02-03 重庆光煦科技有限公司 Concentrated sewage treatment system for residential quarter
CN106148424A (en) * 2016-09-19 2016-11-23 广西壮族自治区林业科学研究院 A kind of method being effectively improved changing food waste normal temperature anaerobic fermentation product biogas

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CN102836863A (en) * 2012-08-30 2012-12-26 北京世纪国瑞环境工程技术有限公司 Comprehensive treatment method for kitchen waste, town excrement and municipal sludge
CN103084380A (en) * 2013-02-01 2013-05-08 青岛胶南绿茵环保科技有限公司 Municipal solid waste processing system and processing method

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CN102286541A (en) * 2011-07-14 2011-12-21 中城泓天(北京)环境科技发展有限公司 Method for preparing biogas through food waste, urban sludge and urban excrement
CN102836863A (en) * 2012-08-30 2012-12-26 北京世纪国瑞环境工程技术有限公司 Comprehensive treatment method for kitchen waste, town excrement and municipal sludge
CN103084380A (en) * 2013-02-01 2013-05-08 青岛胶南绿茵环保科技有限公司 Municipal solid waste processing system and processing method

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104789467A (en) * 2015-04-17 2015-07-22 郑州宇通环保科技有限公司 Anaerobic-digestion treatment device for food wastes
CN104789467B (en) * 2015-04-17 2016-08-03 郑州宇通环保科技有限公司 A kind of food garbage Anaerobic Digestion device
CN105087656A (en) * 2015-09-21 2015-11-25 七台河宝泰隆煤化工股份有限公司 Method for preparing LNG by adopting straw
CN105132057A (en) * 2015-09-21 2015-12-09 七台河宝泰隆煤化工股份有限公司 Method for preparing LNG through biomass
CN105289069A (en) * 2015-10-16 2016-02-03 重庆光煦科技有限公司 Concentrated sewage treatment system for residential quarter
CN106148424A (en) * 2016-09-19 2016-11-23 广西壮族自治区林业科学研究院 A kind of method being effectively improved changing food waste normal temperature anaerobic fermentation product biogas

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