CN215050185U - Device for producing biogas through microbial anaerobic fermentation - Google Patents
Device for producing biogas through microbial anaerobic fermentation Download PDFInfo
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- CN215050185U CN215050185U CN202120818021.XU CN202120818021U CN215050185U CN 215050185 U CN215050185 U CN 215050185U CN 202120818021 U CN202120818021 U CN 202120818021U CN 215050185 U CN215050185 U CN 215050185U
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Abstract
The utility model provides a marsh gas device is produced in microorganism anaerobic fermentation, include: a tank body; the feeding device is communicated with the tank body and used for feeding; the gas collecting device is communicated with the tank body and is used for collecting gas; the discharging device is communicated with the tank body and is used for discharging; the stirring device comprises a stirring motor arranged at the top of the tank body, a metal stirring rod connected with the stirring motor and extending into the tank body, and an impeller arranged on the metal stirring rod; the electrifying device, be in including constant voltage power supply and setting internal electric installation of jar, constant voltage power supply's positive pole with the metal mixing rod is connected, the negative pole with electric installation connects, the utility model discloses enough promote the activity of anaerobic fermentation in-process function microorganism, and then improve anaerobic fermentation methane output and purity, promote organic matter degradation efficiency to can effectively shorten reaction cycle, reduce the running cost.
Description
Technical Field
The utility model relates to a preparation marsh gas technical field especially relates to a marsh gas device is produced in microorganism anaerobic fermentation.
Background
The new energy refers to various energy forms except the traditional energy, including solar energy, tidal energy, geothermal energy, biomass energy, nuclear fusion energy and the like, generally has the characteristics of less pollution and large reserve capacity, and has important significance for solving the increasingly serious environmental pollution problem and the resource shortage problem. In recent years, biogas is gradually discovered and applied to actual production and life by people as a new energy source. Under anaerobic conditions, organic matter undergoes microbial fermentation to produce combustible mixed gas biogas, typically 1m3After the methane is completely combusted, the methane can generate heat equivalent to that provided by 0.7kg of anthracite. In addition, compared with other fuels, the biogas has good antiknock performance and is a good clean fuel; the comprehensive utilization of the methane is one of important ways for changing the rural environment, not only can improve the environment and recover energy, but also can save fertilizer and pesticide and promote and drive the development of the breeding industry.
At present, the commonly used fermentation raw materials of the methane tank comprise livestock and poultry manure, crop straws and the like. China is a big agricultural country, has rich straw resources, can produce about 7 hundred million tons of straws every year, but only a few straws are reasonably utilized, and most of the rest straws are combusted in the open air or randomly stacked, so that resource waste and air pollution are caused. In addition, with the continuous improvement of the economic level of China, the livestock breeding industry is developed vigorously, the intensification degree is higher and higher, a large amount of excrement produced in the livestock breeding process brings little burden to the environment, most of the excrement cannot be reasonably utilized, serious soil and water pollution is caused by direct discharge without treatment, the production of biogas by mixing the excrement of livestock and poultry and straws according to a certain proportion and carrying out anaerobic fermentation is one of the commonly used treatment technologies at present, the biogas has the double benefits of pollution control and energy recovery, and the biogas is widely applied to vast rural areas in China.
The traditional facility for producing biogas by organic matter anaerobic fermentation has the problems of incomplete organic matter degradation and low biogas yield, and directly influences the application of biogas, wherein the biogas yield is unstable and sometimes unavailable, which is a main reason of low rural biogas utilization rate, and has great influence on the subsequent practical application of cooking, heating, lighting and the like by using biogas.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a biogas device is produced in microbial anaerobic fermentation, and the biogas device is produced in microbial anaerobic fermentation can improve the activity of functional microorganisms in the anaerobic fermentation process, thereby improving the yield and purity of anaerobic fermentation methane, promoting the degradation efficiency of organic matters, effectively shortening the reaction period and reducing the operation cost;
the utility model provides a marsh gas device is produced in microorganism anaerobic fermentation, include:
a tank body;
the feeding device is communicated with the tank body and used for feeding;
the gas collecting device is communicated with the tank body and is used for collecting gas;
the discharging device is communicated with the tank body and is used for discharging;
the stirring device comprises a stirring motor arranged at the top of the tank body, a metal stirring rod connected with the stirring motor and extending into the tank body, and an impeller arranged on the metal stirring rod;
and the electrifying device comprises a constant voltage power supply and a conducting device arranged in the tank body, the anode of the constant voltage power supply is connected with the metal stirring rod, and the cathode of the constant voltage power supply is connected with the conducting device.
In a preferred embodiment, the conductive means is a carbon fiber cloth disposed on the inner wall of the tank body.
In a preferred embodiment, the carbon fiber cloth is stitched with a metal mesh.
In a preferred embodiment, the bottom of the metal stirring rod is provided with a carbon fiber brush.
In a preferred embodiment, an electric slip ring is sleeved on the metal stirring rod, and the metal stirring rod is connected with the constant-voltage power supply through the electric slip ring.
In a preferred embodiment, the outer side of the tank body is provided with an insulating layer.
In a preferred embodiment, the heat-insulating layer is a constant-temperature water bath interlayer, and the constant-temperature water bath interlayer is communicated with an external constant-temperature water bath kettle.
In a preferred embodiment, a variable resistor is arranged between the constant voltage power supply and the metal stirring rod, and a multimeter is connected to the variable resistor.
In a preferred embodiment, a liquid seal device is arranged at the joint of the metal stirring rod and the tank body.
In a preferred embodiment, a feed valve is arranged between the feeding device and the tank body, a gas collecting valve is arranged between the gas collecting device and the tank body, and a discharge valve is arranged between the discharge device and the tank body.
The utility model has the advantages that:
1. the device is provided with a power-on device, so that the growth of microorganisms and the utilization efficiency of organic matters are stimulated, the yield and purity of anaerobic fermentation methane are improved, the degradation efficiency of the organic matters is promoted, the reaction period can be effectively shortened, and the operation cost is reduced;
2. through setting up the water bath with thermostatic control intermediate layer, can realize the control to fermentation system temperature, under low temperature environment, can guarantee the metabolic activity of microorganism, guarantee the output of anaerobic fermentation methane.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
description of reference numerals:
1. a tank body; 2. a constant voltage power supply; 3. a stirring motor; 4. a variable resistor; 5. a multimeter; 6. a feeding device; 7. a feed valve; 8. a gas collection device; 9. a gas collection valve; 10. an electric slip ring; 11. a metal stirring rod; 12. an impeller; 13. a carbon fiber brush; 14. carbon fiber cloth; 15. a constant-temperature water bath interlayer; 16. a water inlet of a constant-temperature water bath; 17. a water outlet of the thermostatic waterbath; 18. a discharging device; 19. a discharge valve; 20. and (4) liquid sealing device.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the utility model provides a biogas production device by microorganism anaerobic fermentation, which comprises:
the tank body 1 is used for producing biogas through microbial anaerobic fermentation, the device has wide requirements on substrates, can also be used for fermenting straw and other substances besides livestock and poultry manure, and has no fixed parameter requirements on the solid-liquid ratio, the carbon-nitrogen ratio and the like of the substrates, so that the cost input for pretreatment of the substrates is reduced, and the operation difficulty is reduced.
The feeding device 6 is communicated with the tank body 1 for feeding; the feeding device 6 is arranged at the top of the tank body 1 and can be a feed hopper or a feed pump.
The gas collecting device 8 is communicated with the tank body 1 and is used for collecting gas; the gas collecting device 8 is arranged at the top of the tank body 1 and can be a gas collecting tank or a gas collecting bag.
The discharging device 18 is communicated with the tank body 1 for discharging; the discharging device 18 is arranged at the lower part of the side surface of the tank body 1 and can be a discharging pump.
The stirring device comprises a stirring motor 3 arranged at the top of the tank body 1, a metal stirring rod 11 connected with the stirring motor 3 and extending into the tank body 1, and an impeller 12 arranged on the metal stirring rod 11; according to the viscosity of the substrate, the power of the external stirring motor 3 can be adjusted, and the rotating speed of the impeller 12 can be changed.
The electrifying device comprises a constant voltage power supply 2 and a conducting device arranged in the tank body 1, wherein the positive pole of the constant voltage power supply 2 is connected with the metal stirring rod 11, and the negative pole of the constant voltage power supply is connected with the conducting device. The voltage provided by the constant voltage power supply 2 is adjustable, generally between 0.8V and 2V, the existence of external voltage can enable the tank body 1 to generate about 20mA current, thereby promoting a direct electron transfer mechanism among microorganisms, stimulating the growth of the microorganisms and improving the utilization efficiency of organic matters, the existence of external voltage can greatly improve the yield and purity of the organic matter anaerobic fermentation biogas, greatly improving the availability of the biogas, reducing the cost of subsequent purification treatment, the device is simple and easy to operate, a user does not need to be trained in advance, and the manual regulation and control are not needed in the operation process; after organic matters are put into the tank body 1, a closed loop is formed, and carbon dioxide generated by anaerobic fermentation of the organic matters is electrolyzed into methane.
The conducting device is a carbon fiber cloth 14 arranged on the inner wall of the tank body 1. The carbon fiber cloth 14 is laid on the inner wall of the tank body 1 in a surrounding manner, so that the contact area between the carbon fiber cloth and organic matters and microorganisms in the tank body 1 is increased, the conductive area is increased, and the microorganism attachment area is also increased.
The carbon fiber cloth 14 is sewn with a metal mesh. The metal mesh is a stainless steel mesh and is used for tightly adhering and fixing the carbon fiber cloth 14 to the inner wall of the tank body 1.
The bottom of the metal stirring rod 11 is provided with a carbon fiber brush 13. The carbon fiber brush 13 is used for enlarging the contact area with organic matters and microorganisms in the tank body 1, and increasing the conductive area and the microorganism attachment area.
An electric slip ring 10 is sleeved on the metal stirring rod 11, the electric slip ring 10 is an electric component responsible for communicating with the rotating body and conveying energy and signals, and the metal stirring rod 11 is connected with the constant voltage power supply 2 through the electric slip ring 10.
The outside of jar body 1 is equipped with the heat preservation, can realize the control to fermentation system temperature, under low temperature environment, can guarantee the metabolic activity of microorganism, guarantees the output of anaerobic fermentation methane.
The heat-insulating layer is a constant-temperature water bath interlayer 15, the constant-temperature water bath interlayer 15 is communicated with an external constant-temperature water bath kettle, and a constant-temperature water bath water inlet 16 and a constant-temperature water bath water outlet 17 are formed in the constant-temperature water bath interlayer 15; the temperature of the circulating water is adjusted, the temperature of a fermentation system can be controlled, the anaerobic fermentation of organic matters is slow in low-temperature environment, the temperature of the circulating water is properly increased, the metabolic activity of microorganisms can be guaranteed, and the existence of the heat insulation layer is beneficial to the biogas fermentation to operate under the most economical and efficient temperature condition, generally about 35 ℃.
A variable resistor 4 is arranged between the constant voltage power supply 2 and the metal stirring rod 11, and a multimeter 5 is connected on the variable resistor 4. The variable resistor 4 is used for protecting the circuit, the service life of the device is prolonged, and the current of the circuit is monitored in real time by using the universal meter 5, so that the phenomenon that the growth of microorganisms is inhibited due to overlarge current is avoided.
A liquid seal device 20 is arranged at the joint of the metal stirring rod 11 and the tank body 1. The liquid seal device 20 ensures that the metal stirring rod 11 is not in direct contact with the tank body 1, thereby avoiding friction loss and strictly ensuring the internal air tightness of the device; the liquid for liquid seal is a saturated sodium bicarbonate solution, so that the phenomenon that carbon dioxide generated by reaction is dissolved in water to influence the measurement and calculation of the purity of methane is avoided; liquid seal device 20 sets up at jar body 1's top, including basin and the lid of back-off in the basin that is used for holding a liquid, the only bottom opening of lid, metal puddler 11 passes jar body 1 department and is equipped with the siphunculus that supplies metal puddler 11 to pass, and the outer wall of siphunculus is the inner wall of basin, and the outside of siphunculus is equipped with the outer wall that open-top's drum formed the basin, leaves the gap that supplies a liquid to pass through between the bottom of lid and the top of the jar body, and the upper surface of sealing a liquid is higher than the lid bottom.
A feed valve 7 is arranged between the feed device 6 and the tank body 1, a gas collecting valve 9 is arranged between the gas collecting device 8 and the tank body 1, and a discharge valve 19 is arranged between the discharge device 18 and the tank body 1. The feeding device 6 can be used for supplementing untreated fresh substrate in the fermentation process, and can also be used for adding substances for adjusting the pH value of the substrate at any time; meanwhile, the discharging device 18 can discharge the fermented organic matters in time, the valve can ensure the air tightness of the tank body during the operations of feeding, discharging, replacing the gas collecting device and the like every time, the biological activity of anaerobic microorganisms in the fermentation tank body is not influenced, the process operation is simple and easy to implement, and both batch fermentation and continuous fermentation can be carried out.
Before the device is started, the discharge valve 19 is closed, the feed valve 7 and the gas collecting valve 9 are opened to feed materials, the feed valve 7 is closed after the feeding is finished, the side discharge valve 19 is opened, nitrogen is introduced into the device from the discharge port to remove oxygen in a reserved part and a substrate in the tank body 1, the gas inlet is stopped after about 30min, the discharge valve 19 and the gas collecting valve 9 are closed, and the gas collecting valve 9 is connected with the gas collecting device 8. When the device is started, the gas collecting valve 9 is opened, the constant voltage power supply 2 is opened, the stirring motor 3 is operated to stir and homogenize the organic matters in the tank body 1, after the gas production is stopped, the gas collecting valve 9, the stirring motor 3 and the constant voltage power supply 2 are closed, the feeding valve 7 and the discharging valve 19 are opened, so that the residual organic matters are discharged after the internal and external pressure intensities of the tank body 1 are balanced.
Specific experimental data:
in a fermentation tank with the volume of 3.5L, a mixture of pig manure and biogas slurry is used as a substrate to carry out anaerobic fermentation to produce biogas, the volume of the substrate is 3L, and 20g of straw powder is added to adjust the carbon-nitrogen ratio and increase the content of organic matters in the substrate; and (3) utilizing the completely same biogas fermentation device, applying 1V voltage to the experimental group, not electrifying the control group, continuously stirring at the stirring speed of 100 revolutions per minute by the motor, and measuring and calculating the volume of the generated gas and the methane content in the gas.
The experimental result shows that under the condition of the same substrate components, the yield and purity of methane can be obviously improved due to the existence of the external voltage, the degradation efficiency of organic matters is also improved, and the specific expression is that the total yield of methane in an experimental group is improved by 32.8% compared with that in a control group, and the purity of methane is improved by 36.85%. The improvement of the purity of the methane increases the availability of the biogas produced by the anaerobic fermentation of the pig manure, reduces the cost of the later methane purification, and has important significance for the downstream application of the biogas. In addition, the COD degradation rate of the experimental group is improved by 27 percent compared with that of the control group, which shows that the device can more efficiently realize the harmless treatment of organic wastes and also reduce the subsequent treatment cost of biogas residues and biogas slurry.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A microbial anaerobic fermentation biogas production device is characterized by comprising:
a tank body;
the feeding device is communicated with the tank body and used for feeding;
the gas collecting device is communicated with the tank body and is used for collecting gas;
the discharging device is communicated with the tank body and is used for discharging;
the stirring device comprises a stirring motor arranged at the top of the tank body, a metal stirring rod connected with the stirring motor and extending into the tank body, and an impeller arranged on the metal stirring rod;
and the electrifying device comprises a constant voltage power supply and a conducting device arranged in the tank body, the anode of the constant voltage power supply is connected with the metal stirring rod, and the cathode of the constant voltage power supply is connected with the conducting device.
2. The apparatus for producing biogas according to claim 1, wherein the conductive means is carbon fiber cloth disposed on the inner wall of the tank.
3. The apparatus for producing biogas according to claim 2, wherein a metal mesh is sewn on the carbon fiber cloth.
4. The apparatus for producing biogas according to claim 1, wherein the bottom of the metal stirring rod is provided with carbon fiber brushes.
5. The device for producing biogas through microbial anaerobic fermentation according to claim 1, wherein the metal stirring rod is sleeved with an electric slip ring, and the metal stirring rod is connected with the constant voltage power supply through the electric slip ring.
6. The device for producing biogas through microbial anaerobic fermentation according to claim 1, wherein the outer side of the tank body is provided with an insulating layer.
7. The device for producing the biogas through the anaerobic fermentation of the microorganisms as claimed in claim 6, wherein the heat-insulating layer is a constant-temperature water bath interlayer, and the constant-temperature water bath interlayer is communicated with an external constant-temperature water bath kettle.
8. The apparatus for producing biogas according to claim 1, wherein a variable resistor is provided between the constant voltage power supply and the metal stirring rod, and a multimeter is connected to the variable resistor.
9. The device for producing biogas through microbial anaerobic fermentation according to claim 1, wherein a liquid seal device is arranged at the joint of the metal stirring rod and the tank body.
10. The device for producing biogas through microbial anaerobic fermentation according to claim 1, wherein a feed valve is arranged between the feed device and the tank body, a gas collecting valve is arranged between the gas collecting device and the tank body, and a discharge valve is arranged between the discharge device and the tank body.
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| CN202120818021.XU CN215050185U (en) | 2021-04-21 | 2021-04-21 | Device for producing biogas through microbial anaerobic fermentation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116553720A (en) * | 2023-07-05 | 2023-08-08 | 淄博齐翔腾达化工股份有限公司 | Anaerobic treatment process and treatment equipment for high-concentration chemical wastewater |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116553720A (en) * | 2023-07-05 | 2023-08-08 | 淄博齐翔腾达化工股份有限公司 | Anaerobic treatment process and treatment equipment for high-concentration chemical wastewater |
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