CN102559775B - Method and device utilizing solar energy to strengthen and stabilize methane output - Google Patents

Method and device utilizing solar energy to strengthen and stabilize methane output Download PDF

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Publication number
CN102559775B
CN102559775B CN201210061133.0A CN201210061133A CN102559775B CN 102559775 B CN102559775 B CN 102559775B CN 201210061133 A CN201210061133 A CN 201210061133A CN 102559775 B CN102559775 B CN 102559775B
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medium water
chain
scale removal
solar energy
interchanger
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CN102559775A (en
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李宏君
黄福川
卢朝霞
莫宇飞
梁景
谢云果
杨茂立
唐兴中
粟满荣
田宗义
蓝明新
赵钟兴
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Guangxi University
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Guangxi University
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00—Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
    • C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M43/00—Combinations of bioreactors or fermenters with other apparatus
    • 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
    • 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
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/59—Biological synthesis; Biological purification

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Zoology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Genetics & Genomics (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Sustainable Development (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The utility model provides a method and a device utilizing solar energy to strengthen and stabilize methane output. A circulation loop of heating medium water is formed by a methane fermentation tank, a solar heat collector, a thermal insulation water tank, a heat exchanger and a heating medium water circulation pipe, wherein the heat exchanger is arranged in the methane fermentation tank, and is fixedly arranged between fermentation liquid level and tank bottom, the device is characterized in that a heating medium water circulation pump is laterally connected between the heat exchanger and the thermal insulation water tank; the heat exchanger is provided with a mechanical descaling device which is formed by multiple descaling ring components capable of moving along the surfaces of heat exchange pipes and a power transmitting mechanism driving the descaling ring components to move; and the multiple descaling ring components are sheathed on all heat exchanger pipes and can move flatly along the outer surfaces of the heat exchange pipes. With the method and the device, the recycling of the heating medium water can be realized, the scaling of the heat exchanging pipes is eliminated, the hating efficiency is improved, the output stability of the fermentation tank is ensured at four seasons, and the service life is prolonged.

Description

Utilize method and the device of solar energy enhanced stable biogas output
Technical field
The invention belongs to the method and apparatus that utilizes solar energy enhanced stable biogas output.
Background technology
Biogas is a kind of clean fuel of excellent property, not only raw material sources are abundant, cheap, and have that combustion thermal efficiency is high, cost is low, green, low pollution, the feature that renewable, the capability of antidetonance is good, be a kind of high-quality biomass energy, received increasing concern in the world.But relevant research is found: in anaerobic digestion process, the leavening temperature in methane-generating pit is one of key factor affecting production rate of methane.The most applicable temperature that experiment showed, anaerobically fermenting is in middle temperature (28 DEG C～38 DEG C) or high temperature (46 DEG C～60 DEG C) stage, and the optimum leavening temperature difference of different fermentations material.The output of biogas can have larger variation along with the variation of season and temperature.Meanwhile, if methane-generating pit temperature variation exceedes 3 DEG C, also can there is considerable change in gas production rate.Therefore, must seek a kind of method of temperature-stable within the scope of optimum anaerobically fermenting in methane-generating pit that maintain, stablize methane gas producing amount to strengthen.
The biogas engineering in most of China area is survived the winter comparatively difficult, and subject matter is biogas output rapid drawdown in the winter time, and anaerobically fermenting is almost stagnated.If be uneconomic by coal-fired heating to biogas fermentation feed liquid.Therefore, in recent years there is utilizing the technology of solar heating biogas fermentative liquid.But due to circumstance complication in marsh-gas fermentation tank, severe, the heat-exchanger rig in tank is faced with the problem such as corrosion and scaling and microorganism parasitism, make that heating efficiency is more and more lower, the heat-exchanger rig life-span is short, can not be recycled by the water of solar heating etc.; Wherein, heat-exchanger rig fouling, microorganic adhesion are the major causes that causes whole system heating efficiency to reduce, and must address these problems high yield and stable yields in the hope of realizing biogas production.
Summary of the invention
The technical problem to be solved in the present invention is for the deficiencies in the prior art, and a kind of the produce method of utilizing solar energy enhanced stable biogas output and device stable, that output is high, efficiency high energy consumption is low are provided.
The present invention solves the problems of the technologies described above with following technical scheme:
The present invention utilizes the method for solar energy enhanced stable biogas output, formed the circulation loop of heat medium water by the interchanger in marsh-gas fermentation tank, solar energy collector, attemperater and circulating water pipeline, interchanger is arranged on marsh-gas fermentation tank inside, and between being fixed at the bottom of fermented liquid liquid level and tank, it is characterized in that between interchanger and attemperater, there is heat medium water recycle pump; Interchanger in marsh-gas fermentation tank is with mechanical descaling's device.
Described heat medium water is the deionized water recycling.
Interchanger is made up of with the heating agent vertical heat transfer tube of house steward that confluxes with some conflux house steward, two arms of two heating agents;
Mechanical descaling's device is by forming along the mobile scale removal ring assemblies in heat transfer tube surface and the Poewr transmission mechanism that drives scale removal ring assemblies to move; Wherein: the main scale removal parts of mechanical descaling's device are multiple scale removal ring assemblies, the circular part on scale removal ring assemblies top is enclosed within respectively on the each heat transfer tube being parallel to each other, and can be simultaneously along the outside surface contact friction translation of heat transfer tube, the top of each scale removal ring assemblies is fixedly connected with a connecting rod, and lower end and chain are hinged and can be by chain-driving translation; The chain wheel set that drives Poewr transmission mechanism that scale removal ring assemblies moves to form by electric motor, step-down gear, transmission shaft with by a sprocket wheel, two chain cable fairleads and chain, the wheel shaft of two chain cable fairleads is fixedly connected with two heating agents house steward of confluxing respectively;
The bottom of each scale removal ring assemblies can rely on fixing guide rail stably to move.
Heat medium water circulating line all does insulation and processes, and chain and sprocket wheel are stainless steel.
Beneficial effect of the present invention:
1. can realize heat medium water and recycle, water saving.
2. use after mechanical descaling's device, eliminated the scale problems of the heater block heat transfer tube contacting with fermented liquid, improved the heating efficiency of whole system, extended the work-ing life of whole system.
3. utilize sun power to provide necessary energy to marsh-gas fermentation tank, keep biogas fermentation needed temperature, promote fermentation to carry out, winter methane gas producing amount is significantly improved, with summer gas production rate suitable.Ensure that marsh-gas fermentation tank four seasons gas production rate is stable, improved the utilization ratio of biogas fermentation engineering, saved the energy.
Brief description of the drawings
Fig. 1 is method and the device schema that the present invention utilizes solar energy enhanced stable biogas output.
Fig. 2 is the structural representation that the present invention utilizes solar energy enhanced stable biogas output method mechanical descaling used device.This figure is the left view of mechanical descaling's device of Fig. 1.
In figure: 1-solar energy collector, 2-attemperater, 3-heat medium water recycle pump, 4-interchanger, 5-marsh-gas fermentation tank, 6-electric motor, 7-speed reduction unit, 8-transmission shaft, 9-sprocket wheel, 10-chain, 11-chain cable fairlead, 12-guide rail, 13-scale removal ring assemblies, 14-heat transfer tube, the 15-heating agent house steward of confluxing.
Embodiment
The present invention includes solar heating system and mechanical descaling's device two portions, below in conjunction with accompanying drawing, the present invention is further illustrated.
Solar heating system part:
Solar heating system comprises the circulation loop being made up of the interchanger 4 in marsh-gas fermentation tank, solar energy collector 1, attemperater 2, recycle pump 3 and heating agent pipeline.Interchanger 4 is arranged on marsh-gas fermentation tank 5 inside, and between being fixed at the bottom of the interior fermented liquid liquid level of marsh-gas fermentation tank 5 and tank, it is characterized in that there is heat medium water recycle pump 3 between interchanger 4 and attemperater 2, and interchanger in marsh-gas fermentation tank is with mechanical descaling's device.Solar heating system relies on heat collector 1 to carry out temperature difference circulation from the density difference of the different generations of water temperature in attemperater 2.Under natural convection recurrent state, the heat that the heat medium water in circulation line obtains from heat collector 1, successively passes to the natural pond liquid in fermentor tank by attemperater 2 and interchanger 4 heat.Heat exchange heat medium water recirculation is later returned heat collector 1 and is obtained solar energy.When natural convection is circulated throughout slow time, recycle pump 3 can be started and forced convection circulation can be entered, accelerate the heating efficiency of whole system.
Described heat medium water is the deionized water recycling.Heat medium water circulating line all does insulation and processes.
Described interchanger is made up of with the heating agent vertical heat transfer tube of house steward that confluxes with some conflux house steward 15, two arms of two heating agents.
Mechanical descaling's device part:
Be arranged on the interchanger below the liquid liquid level of natural pond, can face the problem such as fouling and microorganism parasitism.Heat transfer tube fouling not only affects the heat transfer efficiency of heat transfer tube, but also can corrode tubing.Mechanical descaling of the present invention device can reach good descale effect: electric motor 6 and speed reduction unit 7 are arranged on outside fermentor tank, electric motor 6 is through speed reduction unit 7, transmission shaft 8, sprocket wheel 9, chain 10, chain cable fairlead 11 and relevant connection mechanism, power is flowed to scale removal ring assemblies 13, the outside surface of scale removal ring assemblies 13 friction of motion heat transfer tubes 14, removes settling and the dirt on heat transfer tube surface.In the time that scale removal ring assemblies 13 arrives high order end or low order end, electric motor reversion operation, the reverse translation of scale removal ring assemblies continues to remove settling and the dirt on heat transfer tube surface.
Mechanical descaling's device is by forming along the mobile scale removal ring assemblies 13 in heat transfer tube surface and the Poewr transmission mechanism that drives scale removal ring assemblies to move; Wherein: the scale removal parts of mechanical descaling's device are mainly multiple scale removal ring assemblies, the circular part on scale removal ring assemblies top is enclosed within respectively on the each heat transfer tube being parallel to each other, and can be simultaneously along the outside surface contact friction translation of heat transfer tube, the top of each scale removal ring assemblies is fixedly connected with a connecting rod (not shown in FIG.), and lower end and chain 10 are hinged and can be by chain-driving translation; Drive Poewr transmission mechanism that scale removal ring assemblies moves by the chain wheel set being made up of a sprocket wheel 9, two chain cable fairleads 11 and chain 10, the wheel shaft of two chain cable fairleads is fixedly connected with two heating agents house steward 15 of confluxing respectively.
The bottom of each scale removal ring assemblies 13 can rely on fixing guide rail 12 stably to move.
Described chain and sprocket wheel are stainless steel.
Embodiment:
Be 50m to a volume 3fermentor tank transform, load onto solar heating system of the present invention and apparatus for eliminating sludge.Solar energy collector 1 adopts four 1000 × 2000 × 65 vacuum tube type heat collectors to be connected in series, the every effective collector area 1.96m of heat collector 2.Circulation line is adopted as the carbon steel pipes of Φ 59 × 4.5.Interchanger adopts stainless steel tube, and interchanger specification is 4000 × 3500 × 55, the about 4.6m of effective heat exchange area 2.
Test is carried out in the Guangxi in December, and the same day, 6～13 DEG C of temperature, fine with occasional clouds.In implementation process, under natural convection recurrent state, in circulation line, obtain the heat medium water of approximately 60 DEG C of left and right.The temperature of methane-generating pit fermentation biogas liquid is improved significantly, and fermentation biogas liquid temp floats within the scope of 24～30 DEG C.Through heating agent water temperature out of heat transfer tube, 32～37 DEG C of left and right, heat collector 1 is returned in recirculation subsequently, and to obtain solar energy again heated, the fermentation layer heating of giving circularly methane-generating pit.When natural convection is circulated throughout slow time, start recycle pump 3 and enter forced convection circulation, improve the heating efficiency of whole system.Under forced convection recurrent state, fermentation biogas liquid temp floats within the scope of 27～34 DEG C.Process heat transfer tube heating agent water temperature is out 32～39 DEG C of left and right.After enforcement, the same period, data statistics showed: the improved daily output tolerance of this tank for sewage gas has increased by 20～45% than the daily output tolerance before transforming.
In above-mentioned implementation process, the mechanical descaling's device being arranged on interchanger 4 carried out a scale removal operation every 2 hours.Implement test after similar one month, find that heat transfer tube top layer fouling tendency material and dirt settling are little, stainless steel metal gloss is still visible, and surperficial mechanical apparatus for eliminating sludge reaches good descale effect.

Claims (3)

1. one kind is utilized the device of solar energy enhanced stable biogas output, formed the circulation loop of heat medium water by marsh-gas fermentation tank, solar energy collector, attemperater and interchanger and heat medium water circulation tube, interchanger is arranged on marsh-gas fermentation tank inside, and between being fixed at the bottom of fermented liquid liquid level and tank; It is characterized in that heat medium water recycle pump side is connected between interchanger and attemperater; Interchanger is with mechanical descaling's device:
Wherein:
Heat medium water is the deionized water recycling;
Interchanger is made up of with the heating agent vertical heat transfer tube of house steward that confluxes with some conflux house steward, two arms of two heating agents;
Heat medium water circulating line all does insulation and processes;
Mechanical descaling's device is by forming along the mobile scale removal ring assemblies in heat transfer tube surface and the Poewr transmission mechanism that drives scale removal ring assemblies to move; Wherein: the scale removal part of mechanical descaling's device is to form chain wheel set by a sprocket wheel, two chain cable fairleads and chain, the wheel shaft of two chain cable fairleads is fixedly connected with two heating agents house steward of confluxing respectively; The circular part on multiple scale removal ring assemblies top is enclosed within respectively on the each heat transfer tube being parallel to each other and along the outside surface contact friction translation of heat transfer tube, the top of each scale removal ring assemblies is fixedly connected with a connecting rod; Lower end and chain are hinged and by chain-driving translation.
2. the device that utilizes solar energy enhanced stable biogas output as claimed in claim 1, is characterized in that the bottom of each scale removal ring assemblies relies on fixing guide rail stably to move.
3. the device that utilizes solar energy enhanced stable biogas output as claimed in claim 1, is characterized in that chain and sprocket wheel are stainless steel.
CN201210061133.0A 2012-03-09 2012-03-09 Method and device utilizing solar energy to strengthen and stabilize methane output Expired - Fee Related CN102559775B (en)

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CN103120888B (en) * 2013-03-06 2016-04-13 广西大学 A kind of method dehydrating agent with low enthalpy energy regenerated methane
CN103173351A (en) * 2013-03-26 2013-06-26 何志发 Methane fermentation tank

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2713426Y (en) * 2004-06-15 2005-07-27 南华大学 On-line descaling and reinforced heat transfer apparatus for heat exchanger

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CN201864728U (en) * 2010-11-17 2011-06-15 湛江市鸿威科技有限公司 Protein processing and digesting tank

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2713426Y (en) * 2004-06-15 2005-07-27 南华大学 On-line descaling and reinforced heat transfer apparatus for heat exchanger

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