CN103290063B - Method and device for improving and stabilizing biogas yield by oscillating heat pipes - Google Patents
Method and device for improving and stabilizing biogas yield by oscillating heat pipes Download PDFInfo
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- CN103290063B CN103290063B CN201310267840.XA CN201310267840A CN103290063B CN 103290063 B CN103290063 B CN 103290063B CN 201310267840 A CN201310267840 A CN 201310267840A CN 103290063 B CN103290063 B CN 103290063B
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- heat exchange
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- biogas
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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
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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
- 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
- C12M41/24—Heat exchange systems, e.g. heat jackets or outer envelopes inside the vessel
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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
- Y02E50/30—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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention relates to a method for improving and stabilizing the biogas yield by oscillating heat pipes. The method comprises the following steps of: inputting hot water supplied by a low-enthalpy energy system into a heat exchange storage tank in a biogas fermentation tank, performing heat exchange between working media in the oscillating heat pipes and the hot water when the working media pass through the heat exchange storage tank, and then heating biogas slurry by the heated working media which go out of the heat exchange storage tank. Because a plurality of oscillating heat pipes are arranged in the fermentation tank and gas-liquid plungers are distributed in a staggered manner, strong reciprocating oscillation motions are generated in the pipes, so that heat of the hot water is efficiently transferred to the biogas slurry in the biogas fermentation tank, and the fermentation temperature of the biogas slurry is raised by efficient heat transfer. A device for improving and stabilizing the biogas yield by the oscillating heat pipes comprises the biogas fermentation tank, the heat exchange storage tank, the oscillating heat pipes, a temperature control valve, a temperature sensor and other accessory equipment. By virtue of the method and the device disclosed by the invention, the heat transfer efficiency is high, the structure of the device is simple, the problem that the biogas yield is greatly reduced due to low temperatures of biogas fermentation liquid in winter and spring is solved by virtue of low-enthalpy energy, energy is saved, and economic benefits are improved.
Description
Technical field
The invention belongs to biogas anaerobic fermentation is strengthened, biogas output is stablized in the strengthening of especially a kind of oscillating heat pipe method and device.
Background technology
Temperature is one of key factor affecting biogas anaerobic fermentation factor of created gase, and fermentation optimum temperuture is 35 ~ 40 DEG C.If make the long-term steady running of high concentration material biogas fermentation engineering, keep constant, efficient gas production rate, need strictly to control the temperature of biogas fermentation feed liquid, take suitable heating and thermal insulation measure, leavening temperature is not changed with variation of ambient temperature.Therefore the type of heating of selection economical and efficient becomes the problem that the big-and-middle-sized biogas engineering of development must solve.
At present; have compared with the type of heating of widespread use in the big-and-middle-sized biogas engineering of domestic and international mass-producing: methane boiler heating, solar heating, Geothermal energy heating and the heating of marsh gas power generation UTILIZATION OF VESIDUAL HEAT IN; except methane boiler heating, other several type of heating all belongs to and utilizes low enthalpy energy.Although the low enthalpy energy of China (effectively utilizing temperature 45 ~ 70 DEG C) is very abundant, by the restriction of Low Temperature Difference heat transfer technology, major part can not obtain Appropriate application.The heat transfer temperature difference of low enthalpy energy hot water indirect heating natural pond liquid generally only has 10 ~ 25 DEG C, and this just relates to the Low Temperature Difference heat transfer efficiency problem of hot water and natural pond liquid.That is, if the heat transfer efficiency of hot water and natural pond liquid can be improved, just can heat natural pond liquid, save energy consumption by the low enthalpy energy of Appropriate application, improve the economy of biogas engineering.
Oscillating heat pipe, is also called pulsating heat pipe, and it relies on interior media to conduct heat, thus the heat transfer coefficient of oscillating heat pipe is significantly raised (tens times even tens times for general heat pipe).Therefore utilize oscillating heat pipe very large as the heat transfer coefficient of heat exchanger of heat transfer element, especially in lower temperature, interchanger still can ensure enough heat transfer coefficients, and this advantage makes oscillating heat pipe with the obvious advantage in Low Temperature Difference heat transfer; And oscillating heat pipe heat exchanger and installation cost also cheap than general heat pipe interchanger.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method and the device of the stablizing biogas output with oscillating heat pipe technique that utilize low enthalpy energy and oscillating heat pipe to improve existing biogas anaerobic fermentation technology, stablize winter-spring season methane gas producing amount.
The present invention solves the problems of the technologies described above with following technical scheme:
The method of biogas output is stablized in a kind of oscillating heat pipe strengthening, the heat exchange storage tank that the hot water input supplied by low enthalpy energy system is fixed on biogas fermentation top tank structure, the hot water of working medium in oscillating heat pipe when penetrating heat exchange storage tank and in heat exchange storage tank carries out heat exchange, reheats the natural pond liquid in marsh-gas fermentation tank by the working medium after heating after being passed heat exchange storage tank; Owing to there being many oscillating heat pipes in fermentor tank, vapour-liquid plunger is interspersed, and in pipe, thus produces strong reciprocating vibration motion, pass the liquid of the natural pond in marsh-gas fermentation tank, improve the leavening temperature of natural pond liquid with high efficiency heat transmission the heat efficient transmission of hot water.
An equipment for biogas output is stablized in oscillating heat pipe strengthening, comprises marsh-gas fermentation tank, heat exchange storage tank, oscillating heat pipe, temperature-sensing valve, temperature sensor and other auxiliary facilitys; Heat exchange storage tank is arranged on biogas fermentation top tank structure; The part of oscillating heat pipe in heat exchange storage tank is by U-shaped coiling, and the part outside heat exchange storage tank is equipped with along biogas fermentation top tank structure circumference, and is fixed on fermentor tank inwall, every root oscillating heat pipe self-forming closed circulation; Whole fermenter system is provided with several heat exchange storage tank and many oscillating heat pipes; The water inlet of hot water of heat exchange storage tank and water outlet are all arranged on outside marsh-gas fermentation tank; By the temperature sensor be arranged in fermentor tank the temperature of marsh-gas fermentation tank inside sent to the temperature-sensing valve outside tank, regulate the flow entered by the hot water of low enthalpy heat source in tank.
Temperature-sensing valve is self-supporting temperature-sensing valve.
Heat exchange storage tank hot water inflow temperature is 45 DEG C ~ 65 DEG C.
Oscillating heat pipe material is duplex stainless steel kapillary; Its internal diameter is 2mm ~ 5mm.
In oscillating heat pipe, working medium is deionized water, and liquid filled ratio is 20% ~ 85%, and pipe domestic demand vacuumizes process.
Use oscillating heat pipe of the present invention to strengthen method and the device of stablizing biogas output, heat transfer efficiency is high, and apparatus structure is simple, and low enthalpy energy can be utilized preferably to solve the low difficult problem causing methane gas producing amount to decline to a great extent of biogas fermentation feed liquid winter-spring season temperature.A kind of save energy, the effective ways of increasing economic efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the marsh-gas fermentation tank of band oscillating heat pipe system.4 heat exchange storage tanks (3 can only be seen after analysing and observe) are provided with in marsh-gas fermentation tank in this figure.
Fig. 2 is the single oscillating heat pipe coiling schematic shapes in marsh-gas fermentation tank.Single oscillating heat pipe in figure is the structural representation only entering two heat exchange storage tanks.
In figure: 1-marsh-gas fermentation tank, 2-temperature sensor, 3-temperature-sensing valve, 4-oscillating heat pipe, 5-heat exchange storage tank, 6-water inlet of hot water, 7-hot water outlet
Embodiment
The technology of the present invention principle is as follows: the optimal leavening temperature of biogas is 35 ~ 40 DEG C.When the temperature in marsh-gas fermentation tank 1 is less than design temperature, feed back to temperature-sensing valve 3 by temperature sensor 2, thus Open valve, make the hot water (45 ~ 65 DEG C) from low enthalpy energy system enter heat exchange storage tank 5 from heat exchange storage tank water-in 6.In the heating zone (the oscillating heat pipe part namely in heat exchange storage tank) of oscillating heat pipe 4, liquid film in tube wall constantly evaporates because being heated, steam bubble is caused to expand, and promoting vapour-liquid plug flow to cold junction (the oscillating heat pipe part namely outside heat exchange storage tank) condensation contraction, Ye Shi natural pond, the natural pond liquid temp that heat is passed in marsh-gas fermentation tank rises.Owing to there being many oscillating heat pipes in fermentor tank, vapour-liquid plunger is interspersed, thus in pipe, produce strong reciprocating vibration motion, pass the natural pond liquid in marsh-gas fermentation tank (i.e. condensation segment) the heat efficient transmission of hot water, improve the leavening temperature of natural pond liquid in marsh-gas fermentation tank.Close because every root oscillating heat pipe is formed all separately, in pipe, medium circulates at cool and heat ends cycle alternation, and therefore whole heat transfer process is carrying out spontaneous continuously.Hot water after heat exchange flows back to hot-water system through heat exchange storage tank water outlet 7.When the temperature in marsh-gas fermentation tank reaches design temperature, feed back to temperature-sensing valve (3) by temperature sensor (2), thus valve-off, stop supplying hot water.
Below in conjunction with accompanying drawing embodiment, technology of the present invention is described in detail, but protection scope of the present invention not limited by embodiment.
The diameter of marsh-gas fermentation tank 1 is 1m, and height is 1.5m.In tank, to be about tank high by 2/3 for natural pond liquid liquid level.Design employing 2 heat exchange storage tanks 5, heat exchange storage tank material is stainless steel, and welded and installed on biogas fermentation top tank structure, and ensures heat exchange storage tank good seal.
Design employing 18 oscillating heat pipes 4, oscillating heat pipe material is stainless steel capillary, internal diameter 2.4mm, external diameter 4mm, and working medium is deionized water, and liquid filled ratio is 70%, through vacuumizing process in pipe.Oscillating heat pipe in heat exchange storage tank is by U-shaped coiling, and the oscillating heat pipe outside heat exchange storage tank is along the coiling of biogas fermentation top tank structure circumference, and every root oscillating heat pipe forms closed circulation, and is fixed on fermentor tank inwall.
In heating biogas fermentor tank during the liquid of natural pond, the hot water (temperature 55 DEG C) from solar water heating system flows into heat exchange storage tank 5 from water-in 6, and with oscillating heat pipe heat exchange, the hot water after heat exchange flows back to solar water heating system through water outlet 7.The operative temperature arranging temperature-sensing valve 3 is 35 DEG C, and when temperature in marsh-gas fermentation tank is less than 35 DEG C, temperature-sensing valve is opened, and starts to heat exchange storage tank supplying hot water; When temperature in marsh-gas fermentation tank is more than or equal to 35 DEG C, temperature-sensing valve cuts out, and stops to heat exchange storage tank supplying hot water.
The embodiment of application the technology of the present invention, natural pond liquid test initial temperature is 16 DEG C.After heating in about 3.5 hours, natural pond liquid temp reaches 35 DEG C, and temperature-sensing valve cuts out, and stops to heat exchange storage tank supplying hot water.
Claims (6)
1. stablize the method for biogas output with oscillating heat pipe technique for one kind, the hot water of low enthalpy energy system supply is input to the heat exchange storage tank be fixed on biogas fermentation top tank structure, it is characterized in that the hot water of working medium when penetrating heat exchange storage tank and in heat exchange storage tank in oscillating heat pipe carries out heat exchange, after being passed heat exchange storage tank by the working medium heated, reheating the natural pond liquid in marsh-gas fermentation tank; Owing to there being many oscillating heat pipes in fermentor tank, vapour-liquid plunger is interspersed, and in pipe, thus produces strong reciprocating vibration motion, pass the liquid of the natural pond in marsh-gas fermentation tank, improve the leavening temperature of natural pond liquid with high efficiency heat transmission the heat efficient transmission of hot water.
2. stablize an equipment for biogas output with oscillating heat pipe technique, it is characterized in that comprising marsh-gas fermentation tank, heat exchange storage tank, oscillating heat pipe, temperature-sensing valve, temperature sensor, the water inlet of hot water of heat exchange storage tank and water outlet; Heat exchange storage tank is arranged on biogas fermentation top tank structure; The part of oscillating heat pipe in heat exchange storage tank is by U-shaped coiling, and the part outside heat exchange storage tank is equipped with along biogas fermentation top tank structure circumference, and is fixed on fermentor tank inwall, every root oscillating heat pipe self-forming closed circulation; Whole fermenter system is provided with several heat exchange storage tank and many oscillating heat pipes; The water inlet of hot water of heat exchange storage tank and water outlet are all arranged on outside marsh-gas fermentation tank; By the temperature sensor be arranged in fermentor tank the temperature of marsh-gas fermentation tank inside sent to the temperature-sensing valve outside tank, regulate the flow entered by the hot water of low enthalpy heat source in tank.
3. the device stablizing biogas output with oscillating heat pipe technique as claimed in claim 2, is characterized in that temperature-sensing valve is self-supporting temperature-sensing valve.
4. the device stablizing biogas output with oscillating heat pipe technique as claimed in claim 2, is characterized in that heat exchange storage tank hot water inflow temperature is 45 DEG C ~ 65 DEG C.
5. the device stablizing biogas output with oscillating heat pipe technique as claimed in claim 2, is characterized in that oscillating heat pipe material is duplex stainless steel kapillary; Its internal diameter is 2mm ~ 5mm.
6. the device stablizing biogas output with oscillating heat pipe technique as claimed in claim 2, it is characterized in that in oscillating heat pipe, working medium is deionized water, liquid filled ratio is 20% ~ 85%, and pipe domestic demand vacuumizes process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310267840.XA CN103290063B (en) | 2013-06-28 | 2013-06-28 | Method and device for improving and stabilizing biogas yield by oscillating heat pipes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310267840.XA CN103290063B (en) | 2013-06-28 | 2013-06-28 | Method and device for improving and stabilizing biogas yield by oscillating heat pipes |
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| CN103290063A CN103290063A (en) | 2013-09-11 |
| CN103290063B true CN103290063B (en) | 2014-12-24 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107937253B (en) * | 2017-12-01 | 2021-03-23 | 农业部规划设计研究院 | Sequencing batch anaerobic dry fermentation method with enhanced temperature rise function and device thereof |
| CN116282789B (en) * | 2023-02-14 | 2023-08-25 | 青岛汇君环境能源工程有限公司 | High-efficient oxygen suppliment aerobic fermentation device is used in sludge treatment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904031A (en) * | 2006-08-08 | 2007-01-31 | 吉林大学 | Fermentation tank |
| CN202119136U (en) * | 2011-05-26 | 2012-01-18 | 北京科润维德生物技术有限责任公司 | Solar heat collecting system for biogas fermentation tank |
| CN103045464A (en) * | 2011-10-14 | 2013-04-17 | 段国有 | Fermentation tank for biogas engineering |
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2013
- 2013-06-28 CN CN201310267840.XA patent/CN103290063B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904031A (en) * | 2006-08-08 | 2007-01-31 | 吉林大学 | Fermentation tank |
| CN202119136U (en) * | 2011-05-26 | 2012-01-18 | 北京科润维德生物技术有限责任公司 | Solar heat collecting system for biogas fermentation tank |
| CN103045464A (en) * | 2011-10-14 | 2013-04-17 | 段国有 | Fermentation tank for biogas engineering |
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| CN103290063A (en) | 2013-09-11 |
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