CN107858274B - Solar energy and biomass energy combined heating system for biogas engineering in cold region - Google Patents
Solar energy and biomass energy combined heating system for biogas engineering in cold region Download PDFInfo
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- CN107858274B CN107858274B CN201711333414.6A CN201711333414A CN107858274B CN 107858274 B CN107858274 B CN 107858274B CN 201711333414 A CN201711333414 A CN 201711333414A CN 107858274 B CN107858274 B CN 107858274B
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- 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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Abstract
The invention relates to a solar energy and biomass energy combined heating system for biogas engineering in cold regions, which comprises: the methane tank comprises a methane tank body, a water bath heating layer, a gas heating layer, a methane tank temperature sensor and a methane outlet, wherein a top cover is arranged at the top of the methane tank body, the methane outlet is formed in the center of the top cover, the water bath heating layer, the gas heating layer and a heat preservation layer are sequentially arranged on the outer wall of the methane tank body, the methane tank temperature sensor is arranged on the inner wall of the methane tank body, the upper end of a heating pipe is communicated with the upper part of the water bath heating layer, and the lower. The invention utilizes the heat generated by the solar air heat collector and the heat generated by the biomass boiler to realize the production of the biogas in the cold area, and the mode utilizes two renewable energy sources to produce new energy sources, thereby solving the problem of energy sources in the cold area and simultaneously improving the environment.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a solar energy and biomass energy combined heating system for biogas engineering in a cold region.
Background
The biogas is a renewable new energy with great application prospect, and the development and utilization of the biogas can firstly solve the current situation of energy shortage in China; secondly, the development of agriculture and animal husbandry can be promoted; and the rural sanitary conditions can be improved again, and the ecological environment is protected. The biogas resources in China are quite abundant, and the utilization of biogas is a measure which is beneficial to the nation and people, and has great development prospect in the future. In recent years, China invests a large amount of funds for engineering construction of biogas technology for treating livestock and poultry manure, industrial organic wastewater, domestic sewage, urban organic garbage and the like, and a new pattern for common development of household biogas, community joint biogas engineering, large and medium biogas engineering and the like is formed.
However, in cold areas in northern China, the decomposition rate, the gas production rate and the utilization rate of biogas fermentation raw materials are low due to long and cold winter, low outdoor temperature and low ground temperature, the comprehensive utilization rate of the biogas digester is poor, and the phenomenon of half-year use and half-year idle exists, so that huge economic loss is caused. Through experiments, the following results are found: when the temperature of the biogas slurry is higher than 15 ℃, the gas production rate per cubic meter of biogas digester per day can reach 0.1-0.2 m3When the temperature is lower than 10 ℃, the gas production rate per day can only reach 0.01m3Even the phenomenon of frost cracking of the methane tank can occur, and the problems cause the development of the methane in cold regions to be limited to a certain extent. The most effective method for solving the problems is to heat the methane tank, the main heating ways are the traditional heating methods such as an electric heating system and a coal-fired boiler, but the method has the defects of energy waste, poor environmental protection, high cost and the like, and is not in accordance with the original purpose of methane development. Therefore, in order to realize the wide use of the methane in severe cold areas in China, a technology for increasing the temperature of the methane tank suitable for the severe cold areas in China needs to be found out necessarily and urgently.
Due to the limitation of objective conditions, most biogas projects in Heilongjiang province adopt medium-temperature or high-temperature fermentation processes at present, the temperature of fermentation liquid changes along with the change of air temperature and ground temperature, the temperature of the general raw material is about 25 ℃ at the highest in summer and about-30 ℃ at the lowest in winter, and the fermentation tank has huge heat preservation, temperature increase and energy consumption and poor economy, thereby seriously influencing the development of the biogas industry in cold regions. Therefore, how to economically and environmentally improve the temperature of the feed liquid of the methane tank in winter is of great importance for solving the problem of continuous and stable gas production of the methane fermentation tank in cold regions.
The measures for solving the problem of low temperature of the feed liquid in the methane fermentation tank are as follows: the temperature of the methane tank is increased, an accelerant is added, and low-temperature strains are preferably selected, wherein the most effective solution is the temperature increase of the methane tank. The methane tank without temperature raising measures is difficult to realize continuous gas production in low-temperature seasons, and the phenomenon of frost cracking of the methane tank body can also occur in the methane tank in the north. The temperature rise of the methane tank is an important way for ensuring the methane tank to continuously produce gas in low-temperature seasons, preventing frost cracking of the tank body and realizing the industrialization of the methane.
The temperature in the methane tank is also required to be stabilized while the temperature is increased, the fluctuation of the temperature within 1h is not more than 2-3 ℃, and the fluctuation of the temperature within a short time is more than 5 ℃ which causes the gas production rate to be obviously reduced and even stops the gas production, so a certain control measure is adopted to keep the temperature in the methane tank to be stable.
The commonly adopted methane tank heating method at present comprises the following steps: an electrothermal film heating system, a solar heating system, a coal-fired boiler heating, a methane power generation waste heat heating and the like. The traditional heating method has the defects of energy waste, poor environmental protection, high cost and the like, and is not in line with the original purpose of developing the methane. The solar energy and the biomass energy are renewable energy sources, and have the advantages of cleanness, no pollution, inexhaustibility and the like. Solar energy utilization technology and biomass fuel have been popularized and applied in heat supply, but are not generally applied in warming of biogas engineering. Therefore, abundant solar energy and biomass energy resources in Heilongjiang province are fully utilized, a multi-energy complementary combined heating system in a biogas project is researched and developed, stable, clean and efficient heat supply in the biogas project is realized, the problem of unstable gas supply in winter in the biogas project is solved, and the system has very important significance for promoting sustainable development of a biogas centralized gas supply business and promoting energy conservation and emission reduction.
Disclosure of Invention
The invention aims to solve the technical problems, and further provides a solar energy and biomass energy combined heating system for biogas engineering in cold regions, which realizes the matching and complementation of solar energy and a biomass boiler, solves the problem of difficult fermentation in cold regions, saves energy sources and reduces the pollution to the environment.
The technical scheme of the invention is as follows:
a solar energy and biomass energy combined heating system for biogas engineering in cold regions comprises: the biogas tank comprises a biogas tank body, a water bath heating layer, a gas heating layer, a backwater temperature sensor, a biomass boiler, a water outlet temperature sensor, a circulating pump, a flow sensor, a pressure sensor, a heating pipe, a heat preservation layer, a return air inlet temperature sensor, a solar air heat collector, a fan, an air outlet temperature sensor, a top cover, a biogas tank temperature sensor and a biogas outlet;
the biogas tank comprises a biogas tank body, a top cover, a biogas outlet, a water bath heating layer, a gas heating layer and a heat preservation layer, wherein the top of the biogas tank body is provided with the top cover;
the upper part of the water bath heating layer is connected with a water return port of the biomass boiler through a pipeline, a water return temperature sensor is arranged on the pipeline between the water bath heating layer and the biomass boiler, a water inlet of the biomass boiler is connected with the lower part of the water bath heating layer through a water inlet pipeline, and a water outlet temperature sensor, a circulating pump, a flow sensor and a pressure sensor are sequentially arranged on the water inlet pipeline according to the flowing direction of a medium;
the solar air heat collector is communicated with the upper part of the gas heating layer through an air inlet pipeline, the air inlet pipeline is sequentially provided with a fan and an air outlet temperature sensor according to the flowing direction of a medium, the solar air heat collector is communicated with the lower part of the gas heating layer through an air outlet pipeline, and the air outlet pipeline is provided with an air return port temperature sensor.
Further, a spiral spacer is arranged in the gas heating layer.
Further, the heating pipe is spirally arranged inside the methane tank body.
The invention has the following beneficial effects: the invention utilizes the heat generated by the solar air heat collector and the heat generated by the biomass boiler to realize the production of the biogas in the cold area, and the mode utilizes two renewable energy sources to produce new energy sources, thereby solving the problem of energy sources in the cold area and simultaneously improving the environment.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic view of the internal structure of the gas heating layer.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
The first embodiment is as follows: a solar energy and biomass energy combined heating system for biogas engineering in cold regions comprises: a biogas tank body 1, a water bath heating layer 2, a gas heating layer 3, a backwater temperature sensor 4, a biomass boiler 5, an effluent temperature sensor 6, a circulating pump 7, a flow sensor 8, a pressure sensor 9, a heating pipe 10, a heat preservation layer 11, a return air inlet temperature sensor 12, a solar air heat collector 13, a fan 14, an air outlet temperature sensor 15, a top cover 16, a biogas tank temperature sensor 17 and a biogas outlet 18, a top cover 16 is arranged on the top of the methane tank body 1, a methane outlet 18 is arranged at the center of the top cover 16, a water bath heating layer 2, a gas heating layer 3 and a heat preservation layer 11 are sequentially arranged on the outer wall of the methane tank body 1, a methane tank temperature sensor 17 is arranged on the inner wall of the methane tank body 1, the upper end of the heating pipe 10 is communicated with the upper part of the water bath heating layer 2, and the lower end of the heating pipe 10 is communicated with the lower part of the water bath heating layer 2; the upper part of the water bath heating layer 2 is connected with a water return port of the biomass boiler 5 through a pipeline, a water return temperature sensor 4 is arranged on the pipeline between the water bath heating layer 2 and the biomass boiler 5, a water inlet of the biomass boiler 5 is connected with the lower part of the water bath heating layer 2 through a water inlet pipeline, and a water outlet temperature sensor 6, a circulating pump 7, a flow sensor 8 and a pressure sensor 9 are sequentially arranged on the water inlet pipeline according to the medium flowing direction; the solar air heat collector 13 is communicated with the upper part of the gas heating layer 3 through an air inlet pipeline, the air inlet pipeline is sequentially provided with a fan 14 and an air outlet temperature sensor 15 according to the flowing direction of a medium, the solar air heat collector 13 is communicated with the lower part of the gas heating layer 3 through an air outlet pipeline, and the air outlet pipeline is provided with a return air inlet temperature sensor 12. So set up and be provided with water bath zone of heating 2 in the methane tank body 1 outside and heat methane tank body 1 inside to satisfy the requirement of marsh gas production, when the day, through too with can heating the liquid in the water bath zone of heating 2, reducible biomass boiler 5 heat of growing, the heat that mainly leans on biomass boiler 5 to produce at night is its heat of supply.
Example two: a spiral spacer is arranged in the gas heating layer 3. The arrangement prolongs the traveling route of high-temperature gas and prevents heat loss.
Example three: the heating pipe 10 is spirally arranged inside the methane tank body 1. The device can sufficiently heat the substances in the methane tank body 1, and improve the methane yield.
Claims (3)
1. A solar energy and biomass energy combined heating system for biogas engineering in cold regions comprises: a methane tank body (1), a water bath heating layer (2), a gas heating layer (3), a return water temperature sensor (4), a biomass boiler (5), a water outlet temperature sensor (6), a circulating pump (7), a flow sensor (8), a pressure sensor (9), a heating pipe (10), a heat preservation layer (11), a return air inlet temperature sensor (12), a solar air heat collector (13), a fan (14), an air outlet temperature sensor (15), a top cover (16), a methane tank temperature sensor (17) and a methane outlet (18),
the biogas tank comprises a biogas tank body (1), and is characterized in that a top cover (16) is arranged at the top of the biogas tank body (1), a biogas outlet (18) is formed in the center of the top cover (16), a water bath heating layer (2), a gas heating layer (3) and a heat insulation layer (11) are sequentially arranged on the outer wall of the biogas tank body (1), a biogas tank temperature sensor (17) is arranged on the inner wall of the biogas tank body (1), the upper end of a heating pipe (10) is communicated with the upper part of the water bath heating layer (2), and the lower end of the heating pipe (;
the upper part of the water bath heating layer (2) is connected with a water return port of the biomass boiler (5) through a pipeline, a water return temperature sensor (4) is arranged on the pipeline between the water bath heating layer (2) and the biomass boiler (5), a water inlet of the biomass boiler (5) is connected with the lower part of the water bath heating layer (2) through a water inlet pipeline, and a water outlet temperature sensor (6), a circulating pump (7), a flow sensor (8) and a pressure sensor (9) are sequentially arranged on the water inlet pipeline according to the flowing direction of a medium;
the solar air heat collector (13) is communicated with the upper part of the gas heating layer (3) through an air inlet pipeline, the air inlet pipeline is sequentially provided with a fan (14) and an air outlet temperature sensor (15) according to the flowing direction of a medium, the solar air heat collector (13) is communicated with the lower part of the gas heating layer (3) through an air outlet pipeline, and the air outlet pipeline is provided with an air return inlet temperature sensor (12).
2. The solar energy and biomass energy combined heating system for cold region biogas engineering according to claim 1, characterized in that a spiral spacer is arranged in the gas heating layer (3).
3. The solar energy and biomass energy combined heating system for the cold region biogas engineering according to claim 1, characterized in that the heating pipe (10) is spirally arranged inside the biogas tank body (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711333414.6A CN107858274B (en) | 2017-12-14 | 2017-12-14 | Solar energy and biomass energy combined heating system for biogas engineering in cold region |
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| CN201711333414.6A CN107858274B (en) | 2017-12-14 | 2017-12-14 | Solar energy and biomass energy combined heating system for biogas engineering in cold region |
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| CN107858274A CN107858274A (en) | 2018-03-30 |
| CN107858274B true CN107858274B (en) | 2021-04-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109280619A (en) * | 2018-12-07 | 2019-01-29 | 黑龙江省能源环境研究院 | A kind of anaerobic fermentation system of photovoltaic power generation heating |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU105620U1 (en) * | 2010-10-13 | 2011-06-20 | Государственное образовательное учреждение высшего профессионального образования "Пензенская государственная технологическая академия" | BIOGAS COMPLEX |
| CN202022834U (en) * | 2011-01-26 | 2011-11-02 | 齐冰 | Multiple heating system for methane tank in winter |
| CN105462830A (en) * | 2015-12-31 | 2016-04-06 | 中原工学院 | Rural household biogas tank warming system with diaphragm type heat transfer pipe |
| CN205473801U (en) * | 2016-01-26 | 2016-08-17 | 江苏农林职业技术学院 | Automatic accuse temperature biogas fermentation device |
| CN106687750A (en) * | 2014-08-18 | 2017-05-17 | 琼·菲洛米娜·琼斯 | Heating device |
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- 2017-12-14 CN CN201711333414.6A patent/CN107858274B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU105620U1 (en) * | 2010-10-13 | 2011-06-20 | Государственное образовательное учреждение высшего профессионального образования "Пензенская государственная технологическая академия" | BIOGAS COMPLEX |
| CN202022834U (en) * | 2011-01-26 | 2011-11-02 | 齐冰 | Multiple heating system for methane tank in winter |
| CN106687750A (en) * | 2014-08-18 | 2017-05-17 | 琼·菲洛米娜·琼斯 | Heating device |
| CN105462830A (en) * | 2015-12-31 | 2016-04-06 | 中原工学院 | Rural household biogas tank warming system with diaphragm type heat transfer pipe |
| CN205473801U (en) * | 2016-01-26 | 2016-08-17 | 江苏农林职业技术学院 | Automatic accuse temperature biogas fermentation device |
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