CN211111897U - Device for purifying permeation gas as gas fertilizer by utilizing biogas membrane - Google Patents
Device for purifying permeation gas as gas fertilizer by utilizing biogas membrane Download PDFInfo
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- CN211111897U CN211111897U CN201921846844.2U CN201921846844U CN211111897U CN 211111897 U CN211111897 U CN 211111897U CN 201921846844 U CN201921846844 U CN 201921846844U CN 211111897 U CN211111897 U CN 211111897U
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Abstract
The utility model discloses an utilize marsh gas membrane purification infiltration gas to make fertile device of gas, include: a body and a gas separator; wherein, the top of the machine body is provided with a methane gas outlet, and the bottommost end of the machine body is provided with a carbon dioxide gas outlet; the gas separator is arranged at the top in the machine body, and a side gas inlet pipe of the gas separator extends out of the side face of the machine body and is positioned on the side face below a methane gas outlet of the machine body; the bottom of the gas separator is provided with a methane separation port which is communicated with a methane outlet of the machine body through the machine body. Through set up gas separator at the internal top of organism, through gas separator separation effect, separate into methane gas and carbon dioxide with the marsh gas membrane purification infiltration gas that gets into, methane gas discharges from the methane gas outlet at the organism top, and carbon dioxide discharges from the carbon dioxide gas outlet of organism bottom, and the carbon dioxide that obtains can regard as the gas fertilizer that crops need. The device has simple structure, can conveniently separate the biogas membrane to purify the permeation gas and obtain the carbon dioxide used as the gas fertilizer.
Description
Technical Field
The utility model relates to a fertile preparation field of gas especially relates to an utilize marsh gas membrane purification infiltration gas to make fertile device of gas.
Background
The biogas is a combustible mixed gas produced by the synergistic fermentation of organic substances by various microorganisms under anaerobic conditions, and the main component of the biogas is methane (CH)4) And carbon dioxide (CO)2) Wherein, methane accounts for 50-70% (by mass concentration), carbon dioxide accounts for 30-50% (by mass concentration), and a small amount of gases such as hydrogen, carbon monoxide, hydrogen sulfide, oxygen, nitrogen and the like. Methane is commonly called as gas, is the main component of natural gas, is easy to burn, has high heat value, does not produce smoke dust during burning, and is clean energy. The biogas is purified to reach the same quality as the natural gas, and the interconnection and the intercommunication with the natural gas can be realized. The methane content in the purified methane is 95-98% (by mass concentration) and the carbon dioxide content is 2-5% (by mass concentration) which meet the specification requirement.
The membrane separation process of marsh gas is one common marsh gas purifying technology, and utilizes the different dissolving and diffusing rates of various gas components in polymer, so that the components are separated in different permeation rates through fiber membrane wall under the action of partial pressure difference between two sides of the membrane. In order to meet the natural gas specification, two-stage or three-stage membrane separation is usually required, and the carbon dioxide content (by mass concentration) of the permeation gas after the first-stage membrane separation is higher (generally more than 90 percent, and the methane content is lower than 10 percent), so that the value of recycling is not available, and most of the first-stage membrane permeation gas can be directly released into the atmosphere.
In agriculture, carbon dioxide is an important raw material for producing organic substances by photosynthesis of plants, and is widely used in agriculture as an air fertilizer. Several methods of supplementing carbon dioxide as a crop's gas fertilizer are currently common in agriculture including: chemical reaction, carbon dioxide cylinder, fuel combustion, organic matter biological fermentation, liquid carbon dioxide release and dry ice. However, these methods all have certain disadvantages: for example, the chemical method needs to release carbon dioxide by using the action of strong acid, but the strong acid is unsafe for common growers to use and is easy to cause production accidents; the carbon dioxide steel cylinder method, the liquid carbon dioxide release method, the dry ice method and the like consume a large amount of energy in the process of preparing the carbon dioxide, so that the production cost is overhigh; while the fuel combustion process is prone to incomplete combustion leading to the production of carbon monoxide, entrained other combustion products can be detrimental to crop growth.
With the popularization of biogas engineering, the biogas membrane purification technology is more and more widely applied, and carbon dioxide is used as a byproduct of biogas purification and can be obtained without additional consumption of energy and materials, but is not well utilized at present. The prior Chinese patent application CN201810677245.6 proposes a preparation method and an application system of a carbon dioxide gas fertilizer, which provides a utilization method for methane purification, but the method does not consider the potential safety hazard caused by the accumulation of methane in the carbon dioxide gas in a relatively closed greenhouse and the harm to the environment after the methane is discharged into the atmosphere. While another chinese patent application CN201721011583.3 proposes a carbon dioxide fertilizer applying device, although a method and a device for removing methane included in carbon dioxide gas by combustion are provided, the method is not easy to be implemented to remove low-concentration methane by effective combustion, and there is a danger of explosion during combustion, and it is a waste of energy resources.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing an utilize marsh gas membrane purification permeate gas to make fertile device of gas, separation that can be convenient draws marsh gas membrane purification permeate gas, acquires the carbon dioxide as the gas fertilizer.
The utility model aims at realizing through the following technical scheme:
the utility model discloses embodiment provides an utilize marsh gas membrane purification infiltration gas to make fertile device of gas, include:
a body and a gas separator; wherein the content of the first and second substances,
a methane gas outlet is formed in the top of the machine body, and a carbon dioxide gas outlet is formed in the bottommost end of the machine body;
the gas separator is arranged at the top in the machine body, and a gas inlet pipe on the side surface of the gas separator extends to the side surface of the machine body and is positioned on the side surface below a methane gas outlet of the machine body;
the bottom of the gas separator is provided with a methane separation port which is communicated with a methane gas outlet of the machine body through the machine body.
By the above technical scheme the utility model provides a can see out, the embodiment of the utility model provides an utilize marsh gas membrane purification infiltration gas to make fertile device of gas, its beneficial effect is:
the gas separator is arranged at the top in the machine body, the entered biogas membrane purification permeate gas is separated into methane gas and carbon dioxide under the separation action of the gas separator, the methane gas is discharged from a methane gas outlet at the top of the machine body, and the carbon dioxide is discharged from a carbon dioxide gas outlet at the bottom of the machine body under the action of the structure of the gas separator, so that the carbon dioxide is obtained and can be used as a gas fertilizer needed by crops. The device has simple structure, can conveniently separate the biogas membrane to purify the permeation gas and obtain the carbon dioxide as the gas fertilizer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a device for purifying permeate gas as gas fertilizer by using a biogas membrane according to an embodiment of the present invention;
fig. 2 is a top view of a device for purifying permeate gas as gas fertilizer by using a biogas membrane according to an embodiment of the present invention;
FIG. 3 is a flow chart of the application of the biogas membrane to purify the permeate gas as the gas fertilizer;
the parts corresponding to each mark in the figure are: 1-methane gas outlet; 2, an air inlet pipe; 3-a methane separation port; 4-a gas separator; 5-carbon dioxide gas outlet; 6-organism.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of 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. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
As shown in fig. 1 and 2, an embodiment of the present invention provides a device for purifying permeate gas as gas fertilizer by using a biogas membrane, including:
a body and a gas separator; wherein the content of the first and second substances,
a methane gas outlet is formed in the top of the machine body, and a carbon dioxide gas outlet is formed in the bottommost end of the machine body;
the gas separator is arranged at the top in the machine body, and a gas inlet pipe on the side surface of the gas separator extends to the side surface of the machine body and is positioned on the side surface below a methane gas outlet of the machine body;
the bottom of the gas separator is provided with a methane separation port which is communicated with a methane gas outlet of the machine body through the machine body.
In the device, the gas separator adopts a spiral gas separator with a spiral gas inlet pipe. Since the density of methane is 0.717kg/m3 and the density of carbon dioxide is 1.977kg/m3, the density difference exists between the two gases, and the two gases are promoted to be separated under the action of the gas separator structure. Although the gas discharged from the top methane separation port and the carbon dioxide gas outlet at the bottom is a mixed gas of the two gases, the bottom carbon dioxide is more, but the requirement of gas fertilizer with high carbon dioxide content is met, and the gas separator can also reduce the methane content and reduce the risks of explosion and poisoning.
In the device, the machine body is of a cylinder structure and is divided into three sections from top to bottom, the uppermost section is a thin cylinder, the middle section is a thick cylinder, and the lowermost section is a conical cylinder. The diameter of the thick cylinder is larger than that of the thin cylinder, and the diameter of the top end of the conical cylinder is equal to that of the thick cylinder. The machine body with the structure can improve the flowing speed of the gas and increase the separation effect of the two gases.
In the device, the air inlet direction of the air inlet pipe on the side surface of the gas separator is vertical to the air outlet direction of the methane outlet on the machine body.
The device of the utility model can realize separating carbon dioxide and improve the yield of crops in agriculture, and can recycle mixed methane. The device can realize that the carbon dioxide in the waste gas is used as the air fertilizer for the crops in the greenhouse to be applied, improves the crop yield and changes waste into valuables.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The utility model discloses a device can separate marsh gas membrane purification infiltration gas and obtain carbon dioxide gas and methane gas, and the gas fertilizer that both can satisfy crops under the safe condition is used, reaches the purpose of increase production, can suppress the low cost again, reaches the price advantage to traditional gas fertilizer utilization technique.
The utility model discloses the mode that the device isolated carbon dioxide gas as crops gas fertilizer is as follows (see fig. 3):
carbon dioxide is a main raw material for green plant photosynthesis, the concentration of the carbon dioxide directly influences the photosynthetic rate of crops, and various crops have compensation points and saturation points for the carbon dioxide. Under certain conditions, the assimilation absorption amount and the respiration release amount of the carbon dioxide by the crops are equal, the net photosynthetic rate is zero, and the concentration of the carbon dioxide at the moment is a compensation point. The photosynthesis is gradually enhanced with the increase of the carbon dioxide concentration, and the carbon dioxide concentration when the photosynthesis rate of the crop is large and maximum is the saturation point of the crop. Above the saturation point, there is a tendency for the photosynthetic intensity to decrease as the carbon dioxide concentration is increased.
The rate of photosynthesis in different crops increases with increasing carbon dioxide concentration between their carbon dioxide compensation and saturation points. The carbon dioxide compensation point of the carbon 3 crop is generally 30-90 PPM, and the saturation point is generally 1000-1500 PPM; the carbon dioxide compensation point of the carbon 4 crops is generally 0-10 PPM, and the saturation point is generally about 2000 PPM.
Meanwhile, the concentration of carbon dioxide in the greenhouse has obvious daily change, and due to the airtight characteristic of the greenhouse, crop respiration at night, soil microbial activity and organic matter decomposition occur, carbon dioxide is continuously accumulated, the maximum concentration is reached before the mat is uncovered in the morning, and the general concentration can reach 1400-2500 PPM. After the mat is uncovered, the photosynthesis is continuously enhanced along with the improvement of light and temperature conditions, the concentration of the dioxide is rapidly reduced, the concentration is lower than the outside after the mat is uncovered for 2 hours, only 150-200 PPM is needed when the temperature reaches 8-9 points, and the temperature is lower if the ventilation is not timely. Even if ventilated, CO2The concentration can only be supplemented to 300 PPM. After ventilation, external carbon dioxide enters the greenhouse, but the entering amount is limited until the concentration in the greenhouse is about 4:00 in the afternoon and is lower than the external, after 4:00, the photosynthesis speed is reduced along with the reduction of illumination and the reduction of temperature, and the concentration of the carbon dioxide begins to rise again. The indoor temperature is higher after covering the mat and in the front half night, the crops and the soil can breathe vigorously, so that the concentration of the carbon dioxide can be increased faster, and the carbon dioxide reaches the highest in one day again in the next day. In the afternoon of a fine day, the ventilation opening is closed too early, and the concentration of carbon dioxide in the greenhouse is reduced again because the crops still have strong photosynthesis.
Therefore, after 2 hours after taking off the mat, namely 8-9 am, the first-stage membrane permeation gas is introduced into the greenhouse to apply the gas fertilizer to the crops, so that a better effect can be achieved. The gas fertilizer application system is shown in the following figure and comprises a primary membrane permeation gas conveying fan, a gas separator and a harmful gas alarm. The specific implementation steps are as follows: starting a primary membrane permeation gas conveying fan at 8-9 am, slowly conveying the permeation gas to a gas separator, roughly separating lighter methane and heavier carbon dioxide by using a cyclone separation principle, discharging the gas containing more methane from the upper part of the gas separator, sending the gas containing more carbon dioxide from the bottom of the gas separator, and conveying the gas containing more carbon dioxide by a pipelineSending the methane gas into the greenhouse, and simultaneously starting an exhaust fan in the greenhouse to achieve the purpose of reducing the content of the methane gas. Meanwhile, a harmful gas alarm is arranged to detect the methane content in the temperature chamber, and the primary membrane permeation gas conveying fan is closed within a certain concentration range, so that the overhigh methane content in the greenhouse is avoided. Since the saturation point of crop carbon dioxide is 2000ppm, i.e., 0.2%, CO is present according to the primary membrane permeate gas composition290％，CH410%, it is estimated that even if the carbon dioxide content reaches 0.9%, the methane content will reach 0.1% at most, and the explosion will not be reached. Therefore, the explosion risk can be avoided by controlling the alarm line with the methane content of 10000ppm, and the effect of increasing the yield by applying the gas fertilizer can be achieved. Meanwhile, if one application is insufficient, the operation can be carried out for a plurality of times between 8 o 'clock and 4 o' clock in the afternoon, and the carbon dioxide is supplemented in several times. In addition, the labor of personnel entering a greenhouse during the application of the gas fertilizer is reduced.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A device for purifying permeation gas as gas fertilizer by utilizing a biogas membrane is characterized by comprising:
a body and a gas separator; wherein the content of the first and second substances,
a methane gas outlet is formed in the top of the machine body, and a carbon dioxide gas outlet is formed in the bottommost end of the machine body;
the gas separator is arranged at the top in the machine body, and a gas inlet pipe on the side surface of the gas separator extends to the side surface of the machine body and is positioned on the side surface below a methane gas outlet of the machine body;
the bottom of the gas separator is provided with a methane separation port which is communicated with a methane gas outlet of the machine body through the machine body.
2. The apparatus as claimed in claim 1, wherein the gas separator is a spiral gas separator having a spiral inlet pipe.
3. The apparatus as claimed in claim 1 or 2, wherein the apparatus has a cylindrical structure, which is divided into three sections from top to bottom, the uppermost section is a thin cylindrical body, the middle section is a thick cylindrical body, and the lowermost section is a tapered cylindrical body.
4. The apparatus for purifying permeate gas as fertilizer using biogas membrane as claimed in claim 3, wherein the diameter of the thick cylinder of the machine body is larger than that of the thin cylinder, and the diameter of the top end of the cone cylinder is equal to that of the thick cylinder.
5. The apparatus as claimed in claim 1 or 2, wherein the gas inlet direction of the gas inlet pipe on the side of the gas separator is perpendicular to the gas outlet direction of the methane outlet on the machine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921846844.2U CN211111897U (en) | 2019-10-30 | 2019-10-30 | Device for purifying permeation gas as gas fertilizer by utilizing biogas membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921846844.2U CN211111897U (en) | 2019-10-30 | 2019-10-30 | Device for purifying permeation gas as gas fertilizer by utilizing biogas membrane |
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| Publication Number | Publication Date |
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| CN211111897U true CN211111897U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921846844.2U Active CN211111897U (en) | 2019-10-30 | 2019-10-30 | Device for purifying permeation gas as gas fertilizer by utilizing biogas membrane |
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