Constant-pressure biogas digester

Abstract

The utility model provides a constant pressure biogas digester, relates to the biogas digester technical field, include: main tank body, internal corrugation telescopic membrane body and upper support rod, the internal corrugation telescopic membrane body is fixed in the middle inside of main tank body, the upper support rod is provided in the upper part of internal corrugation telescopic membrane body, the upper part of internal corrugation telescopic membrane body is communicated and fixed with upper corrugation communicating pipe, and the lower part of internal corrugation telescopic membrane body is communicated and fixed with lower corrugation communicating pipe. An upper cover plate is fixed to the top of the inner corrugated telescopic film body and slidably arranged on the inner side of the upper portion of the main tank body, and the lower end of the inner corrugated telescopic film body communicates with the lower portion of the main tank body. The upper supporting spring pushes the inner corrugated telescopic film body and the upper cover plate to move downwards to increase the pressure of the biogas, the gas outlet pressure is increased when the amount of the biogas is small, the gas outlet pressure of the biogas tends to be constant, and the problem that when the amount of the biogas is small, the pressure of a gas outlet of the biogas is reduced due to reduction of the amount of the biogas is solved. And the use of biogas is not stable enough.

Description

Technical Field

[0001] The utility model relates to the technical field of biogas tanks, in particular to a constant-pressure biogas tank. Background Art

[0002] In rural breeding production, biogas digesters are built to ferment livestock manure and other materials to produce biogas, which is then used for combustion, lighting, etc. The fermented biogas can also be used directly as crop fertilizer.

[0003] In order to maintain a stable pressure, an existing biogas digester is equipped with a pressure relief valve to discharge excess biogas to avoid excessive pressure in the biogas digester. However, during the use of biogas, when the amount of biogas is small, the pressure of the biogas will decrease due to the reduction in amount, resulting in a decrease in the pressure at the biogas outlet. The combustion and lighting of the biogas will be greatly reduced, and the use of biogas is not stable enough. Summary of the invention

[0004] The disclosed embodiment relates to a constant-pressure biogas digester. During the use of the biogas inside the main tank, the upper support spring pushes the inner corrugated expansion membrane and the upper cover plate downward to increase the pressure of the biogas, thereby increasing the outlet pressure when the amount of biogas is small. The outlet pressure of the biogas tends to be constant, thereby avoiding the situation where the outlet pressure also decreases when the amount of biogas is small, the biogas use pressure changes greatly, and the biogas use is unstable.

[0005] In a first aspect of the present disclosure, a constant-pressure biogas digester is provided, which specifically includes: a main tank body, an inner corrugated telescopic membrane body and an upper support rod, wherein an inner corrugated telescopic membrane body is fixed to the inner side of the middle part of the main tank body, an upper support rod is arranged above the inner corrugated telescopic membrane body, a liquid inlet chamber and a liquid outlet chamber are respectively connected to the two sides of the main tank body, an inner partition is fixed to the inner side of the main tank body, a lower connecting port is opened at the lower part of the inner partition, an upper three-way pressure relief valve is fixed to the top of the main tank body, and an upper air vent is opened at the upper part of the main tank body.

[0006] The liquid inlet chamber and the liquid outlet chamber are separated by an inner partition, and the inner partition is a herringbone structure. The inner partition is provided with two lower connecting ports. The inner partition between the liquid inlet chamber and the liquid outlet chamber does not have a lower connecting port. The inner partition is provided with a partition space between the liquid inlet chamber and the liquid outlet chamber. The liquid inlet chamber flows with the liquid outlet chamber in one direction through the two lower connecting ports of the inner partition, and the liquid inlet chamber and the liquid outlet chamber cannot flow directly. The liquid inlet chamber, the partition space in the middle, and the liquid outlet chamber are divided into three parts.

[0007] In at least some embodiments, an upper corrugated connecting pipe is fixedly connected to the upper portion of the inner corrugated telescopic membrane body, and an upper cover plate is fixedly fixed to the top of the inner corrugated telescopic membrane body.

[0008] In at least some embodiments, the upper cover plate is slidably disposed on the upper inner side of the main tank body, the lower end of the inner corrugated telescopic membrane body is connected to the lower part of the main tank body, the inner corrugated telescopic membrane body is located above the inner partition, and the inner partition and the inner corrugated telescopic membrane body are connected internally.

[0009] In at least some embodiments, an upper slider is rotatably disposed on the upper end of the upper support rod, the upper slider is slidably connected to the middle slider, and an upper support spring is fixed to one side of the upper slider.

[0010] In at least some embodiments, upper support rods are rotatably provided on both sides of the upper cover plate, a middle slide rod is fixed at the top inner side of the main tank body, a tail end of an upper support spring is fixed to the main tank body, and the upper support spring pushes the upper slide rod to slide along the middle slide rod, and the upper slide rod pushes the upper cover plate to move downward synchronously through the upper support rod to squeeze the upper cover plate.

[0011] In at least some embodiments, the upper support spring supports the upper slider to move toward one side of the upper corrugated connecting pipe, the upper cover plate moves downward, and the inner corrugated expansion membrane and the upper cover plate move downward to increase the pressure on the internal biogas.

[0012] The utility model provides a constant pressure biogas digester, which has the following beneficial effects:

[0013] During the use of the biogas inside the main tank, the upper support spring pushes the inner corrugated expansion membrane and the upper cover plate downward to increase the pressure of the biogas, thereby increasing the outlet pressure when the amount of biogas is small. The outlet pressure of the biogas tends to be constant, thus avoiding the situation where the outlet pressure will also decrease when the amount of biogas is small, resulting in large and unstable changes in the biogas usage pressure.

[0014] The liquid inlet chamber flows unidirectionally to the liquid outlet chamber through the two lower connecting ports of the inner partition. The liquid inlet chamber and the liquid outlet chamber cannot flow directly, so as to avoid the mixing of new and old biogas slurry and ensure the full fermentation of the new biogas slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0016] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0017] In the attached picture:

[0018] Figure 1 A schematic diagram showing the overall structure of the present application;

[0019] Figure 2 A schematic diagram showing a half-section structure of the main tank body of the present application is shown;

[0020] Figure 3 A schematic diagram showing the lower communication port structure of the present application is shown;

[0021] Figure 4 A schematic diagram showing the inner corrugated telescopic membrane structure of the present application is shown;

[0022] Figure 5 A schematic diagram of the structure of the inner partition of the present application is shown;

[0023] Figure 6 A schematic diagram showing the structure of the split state of the present application;

[0024] Reference numerals list

[0025] 1. Main tank body; 101. Liquid inlet chamber; 102. Liquid outlet chamber; 103. Inner partition; 104. Lower connecting port; 105. Upper three-way pressure relief valve; 106. Upper vent hole;

[0026] 2. Inner corrugated telescopic membrane; 201. Upper corrugated connecting pipe; 202. Upper cover plate;

[0027] 3. Upper support rod; 301. Upper sliding block; 302. Middle sliding rod; 303. Upper support spring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example 1: Please refer to Figures 1 to 6 :

[0030] The utility model proposes a constant-pressure biogas tank, comprising: a main tank body 1, an inner corrugated telescopic membrane body 2 and an upper support rod 3, the two sides of the main tank body 1 are respectively connected with a liquid inlet chamber 101 and a liquid outlet chamber 102, an inner partition 103 is fixed on the inner side of the main tank body 1, a lower connecting port 104 is provided at the lower part of the inner partition 103, an upper three-way pressure relief valve 105 is fixed on the top of the main tank body 1, an upper vent hole 106 is provided on the upper part of the main tank body 1, and the upper vent hole 106 is used to discharge and inhale gas when the inner corrugated telescopic membrane body 2 is compressed and expanded, an inner corrugated telescopic membrane body 2 is fixed on the inner side of the middle part of the main tank body 1, an upper corrugated connecting pipe 201 is connected and fixed on the upper part of the inner corrugated telescopic membrane body 2, an upper cover plate 202 is fixed on the top of the inner corrugated telescopic membrane body 2, and the upper cover plate 202 is slidably arranged on the upper inner side of the main tank body 1, the lower end of the inner corrugated telescopic membrane body 2 is fitted and fixed to the inner wall of the main tank body 1, the lower end of the inner corrugated telescopic membrane body 2 is communicated with the lower part of the main tank body 1, the inner corrugated telescopic membrane body 2 is above the inner partition 103, the inner partition 103 is communicated with the inner part of the inner corrugated telescopic membrane body 2, the biogas inside the main tank body 1 gradually increases, and the increase of biogas will push the inner corrugated telescopic membrane body 2 and the upper cover plate 202 to move upward and expand, an upper support rod 3 is arranged above the inner corrugated telescopic membrane body 2, the upper support rod 3 is a rectangular long rod structure, an upper slider 301 is rotatably arranged on the upper end of the upper support rod 3, the upper slider 301 and the middle slider 302 are slidably connected, and an upper support spring 303 is fixed to one side of the upper slider 301.

[0031] In the embodiments of the present disclosure, as shown in the attached Figure 2 , 3 As shown in Figure 5, the liquid inlet chamber 101 and the liquid outlet chamber 102 are separated by an inner partition 103. The inner partition 103 is a herringbone structure. The inner partition 103 is provided with two lower connecting ports 104. The inner partition 103 between the liquid inlet chamber 101 and the liquid outlet chamber 102 does not have the lower connecting port 104. The inner partition 103 is provided with a partition space between the liquid inlet chamber 101 and the liquid outlet chamber 102. The liquid inlet chamber 101 flows with the liquid outlet chamber 102 in one direction through the two lower connecting ports 104 of the inner partition 103. The liquid inlet chamber 101 and the liquid outlet chamber 102 cannot flow directly. The liquid inlet chamber 101, the partition space in the middle and the liquid outlet chamber 102 are divided into three parts to avoid the mixing of new and old biogas slurry.

[0032] In the embodiments of the present disclosure, as shown in the attached Figure 2 , 3 As shown in , 4, upper support rods 3 are rotated on both sides of the upper cover plate 202, the middle slide rod 302 is fixed to the top of the inner side of the main tank body 1, the tail end of the upper support spring 303 is fixed to the main tank body 1, the upper support spring 303 pushes the upper slider 301 to slide along the middle slide rod 302, and the upper slider 301 pushes the upper cover plate 202 to move downward synchronously through the upper support rod 3 to squeeze the upper cover plate 202.

[0033] In the embodiments of the present disclosure, as shown in the attached Figure 2 , 3As shown in Figure 4, the upper support spring 303 supports the upper slider 301 to move toward the side of the upper corrugated connecting pipe 201, and the upper cover plate 202 moves downward. The inner corrugated expansion membrane 2 and the upper cover plate 202 move downward to increase the pressure on the internal biogas, and increase the gas outlet pressure when the amount of biogas is small. The gas outlet pressure when the amount of biogas is large or small tends to be constant, avoiding the situation where the gas outlet pressure is small and the gas outlet is unstable when the amount of biogas is small.

[0034] Embodiment 2, on the basis of embodiment 1, a water level float is arranged inside the main tank body 1, and the liquid discharge flow of the liquid discharge chamber 102 is controlled by the water level float, and at the same time, the pressure increase after the biogas is generated inside the main tank body 1 is avoided, and the liquid inside the main tank body 1 is pressed outward from the liquid discharge chamber 102, thereby ensuring the time for the liquid inside the main tank body 1 to ferment and produce biogas.

[0035] The working principle of this embodiment is as follows: the main tank body 1 is made of glass fiber. After the main tank body 1 is manufactured as a whole in the factory, it can be transported to the site pit and pre-buried with a connecting pipe, so that it can be used. The installation and use are more convenient and quick. The liquid inlet chamber 101 is connected to the incoming pipe, and the liquid outlet chamber 102 is connected to the outflow channel. The main tank body 1 is fermented and produced. The inner partition 103 divides the inside of the main tank body 1 into three compartments. The inner partition 103 is provided with a compartment between the liquid inlet chamber 101 and the liquid outlet chamber 102. The liquid inlet chamber 101 flows with the liquid outlet chamber 102 in one direction through the two lower connecting ports 104 of the inner partition 103. The liquid inlet chamber 101 and the liquid outlet chamber 102 cannot flow directly. The liquid inlet chamber 101 and the middle compartment space and the liquid outlet chamber 102 are three parts. The nearest biogas is in the liquid inlet chamber 101, and the fermented biogas flows outward in the liquid outlet chamber 102, so as to avoid the mixing of new and old biogas, and ensure the full fermentation of the new biogas.

[0036] As the biogas generated by fermentation inside the main tank body 1 gradually increases, the increase in biogas will push the inner corrugated telescopic membrane 2 and the upper cover plate 202 to move upward and expand. The expansion of the inner corrugated telescopic membrane 2 expands the biogas accommodating space, and the upper cover plate 202 drives the upper support rod 3 to move upward and compress the upper support spring 303. The biogas inside the main tank body 1 is connected to the upper three-way pressure relief valve 105 through the upper corrugated connecting pipe 201. The upper three-way pressure relief valve 105 can relieve pressure and connect the use pipeline of biogas. The biogas inside the main tank body 1 is discharged during use. In the process, biogas is gradually consumed, and the upper support spring 303 pushes the upper slider 301 to slide along the middle slide rod 302. The upper slider 301 pushes the upper cover plate 202 to move downward synchronously through the upper support rod 3 to squeeze the upper cover plate 202. The inner corrugated telescopic membrane 2 and the upper cover plate 202 move downward to increase the pressure on the internal biogas, and increase the outlet pressure when the amount of biogas is small. The outlet pressure when the amount of biogas is large and small tends to be constant, which avoids the situation that the outlet pressure will also decrease when the amount of biogas is small, and the biogas use pressure changes greatly and is unstable.

[0037] In this article, there are a few points to note:

[0038] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0039] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0040] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A constant pressure biogas digester, comprising: A main tank body (1), an inner corrugated telescopic membrane body (2) and an upper support rod (3); characterized in that an inner corrugated telescopic membrane body (2) is fixed to the inner side of the middle of the main tank body (1), an upper support rod (3) is arranged above the inner corrugated telescopic membrane body (2), an upper corrugated connecting pipe (201) is fixed to the upper part of the inner corrugated telescopic membrane body (2), an upper cover plate (202) is fixed to the top of the inner corrugated telescopic membrane body (2), and the upper cover plate (202) is slidably arranged on the inner side of the upper part of the main tank body (1).

2. A constant pressure biogas digester according to claim 1, characterized in that: The two sides of the main tank body (1) are respectively connected with a liquid inlet chamber (101) and a liquid outlet chamber (102); an inner baffle (103) is fixed inside the main tank body (1); a lower connecting port (104) is provided at the lower part of the inner baffle (103); an upper three-way pressure relief valve (105) is fixed at the top of the main tank body (1); and an upper vent hole (106) is provided at the upper part of the main tank body (1).

3. A constant pressure biogas digester according to claim 2, characterized in that: The liquid inlet chamber (101) and the liquid outlet chamber (102) are separated by an inner partition (103). The inner partition (103) is a herringbone structure. The inner partition (103) is provided with two lower communication openings (104). The inner partition (103) between the liquid inlet chamber (101) and the liquid outlet chamber (102) is not provided with a lower communication opening (104).

4. A constant pressure biogas digester according to claim 2, characterized in that: The lower end of the inner corrugated telescopic membrane (2) is in communication with the lower part of the main tank body (1), the inner corrugated telescopic membrane (2) is located above the inner partition (103), and the inner partition (103) and the inner corrugated telescopic membrane (2) are in communication with each other.

5. A constant pressure biogas digester according to claim 1, characterized in that: An upper slider (301) is rotatably provided at the upper end of the upper support rod (3), the upper slider (301) and the middle slider (302) are slidably connected, and an upper support spring (303) is fixed to one side of the upper slider (301).

6. A constant pressure biogas digester according to claim 5, characterized in that: Upper support rods (3) are rotatably provided on both sides of the upper cover plate (202), the middle sliding rod (302) is fixed to the top of the inner side of the main tank body (1), and the tail end of the upper support spring (303) is fixed to the main tank body (1).

7. A constant pressure biogas digester according to claim 5, characterized in that: The upper support spring (303) supports the upper slider (301) to move toward the side of the upper corrugated connecting pipe (201), and the upper cover plate (202) moves downward.

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