Novel efficient biogas digester structure

Abstract

The invention belongs to the technical field of biogas digesters, and particularly relates to a novel efficient biogas digester structure which comprises a brick-concrete digester body, the brick-concrete digester body is communicated with the bottom end of a feed inlet and the bottom end of a slag outlet, a waterproof gas-collecting hood is built in the brick-concrete digester body, and a high liquid level switch and a low liquid level switch are installed at the position, below the waterproof gas-collecting hood, of the brick-concrete digester body in an up-down spaced mode. The brick-concrete pond body below the low-liquid-level switch is communicated with the bottom end of a water feeding pipe, an electric valve is mounted on the water feeding pipe, the top end of the water feeding pipe is communicated with the aerobic pond above a waterproof gas-collecting hood, a gas-collecting pipe is mounted on the waterproof gas-collecting hood in a penetrating manner, and a pressure release valve is mounted on the gas-collecting pipe. The brick-concrete tank body adopts special materials and technical means, so that the sealing performance and the corrosion resistance of the brick-concrete tank body are enhanced, and the methane leakage phenomenon is reduced; the biogas slurry is automatically separated by using the internal pressure of the biogas through the use of the electric valve and the two groups of liquid level switches, and the collected biogas slurry is converged into the aerobic pond to be directly subjected to water treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of biogas digesters, and in particular relates to a novel high-efficiency biogas digester structure. Background Art

[0002] With the rapid development of agricultural breeding, the amount of waste generated by livestock and poultry breeding has increased dramatically. These wastes mainly include organic wastes such as livestock and poultry manure and feed residues. If these wastes are not handled in time, they will not only occupy a large amount of land resources, but also pollute the surrounding water and soil through rainwater runoff and infiltration, seriously affecting the ecological balance and human health. Therefore, developing an efficient and environmentally friendly aquaculture waste treatment technology to convert waste into valuable resources has become an urgent problem to be solved in the current environmental protection field.

[0003] Traditional biogas digesters have played a certain role in treating aquaculture waste, but they have many shortcomings. First, traditional biogas digesters are often simple in structure design and lack intelligent and automated management methods, resulting in low biogas production efficiency and inconvenient management of biogas slurry and biogas residue. Secondly, during the biogas collection process, traditional biogas digesters are prone to biogas leakage due to poor sealing performance or improper biogas pressure control, which reduces the biogas utilization rate. In addition, traditional biogas digesters often lack effective secondary treatment methods when treating biogas slurry and biogas residue, resulting in substandard water quality after treatment, which cannot be directly discharged or reused, increasing the risk of environmental pollution. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a new type of high-efficiency biogas digester structure to solve the problems of low biogas production efficiency, inconvenient management of biogas slurry and residue, and difficulty in ensuring the quality of subsequent water treatment when traditional biogas digesters treat these wastes.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a new type of high-efficiency biogas tank structure, including a brick-concrete tank body, the brick-concrete tank body is connected to the bottom ends of the feed inlet and the slag outlet, a waterproof gas collecting hood is built in the brick-concrete tank body, a high liquid level switch and a low liquid level switch are installed at intervals above and below the brick-concrete tank body below the waterproof gas collecting hood, the brick-concrete tank body below the low liquid level switch is connected to the bottom end of a water supply pipe, an electric valve is installed on the water supply pipe, the top end of the water supply pipe is connected to the aerobic pond above the waterproof gas collecting hood, a gas collecting pipe is installed through the waterproof gas collecting hood, and a pressure relief valve is installed on the gas collecting pipe.

[0006] The beneficial effects of the present invention are as follows: the brick-concrete tank body adopts special materials and technical means to enhance its sealing performance and corrosion resistance, and reduce biogas leakage; the internal pressure of biogas is used to automatically separate biogas slurry through the use of electric valves and two sets of liquid level switches, and the biogas slurry is collected and merged into an aerobic pond for direct water treatment.

[0007] In order to achieve automatic separation and collection of biogas slurry;

[0008] As a further improvement of the above technical solution: the high liquid level switch, the low liquid level switch and the electric valve are electrically connected to a relay.

[0009] The beneficial effect of this improvement is as follows: when the liquid level of the biogas reaches the detection height of the high liquid level switch, the relay controls the valve circuit of the electric valve to open, and the biogas in the brick-concrete tank is pressed into the aerobic pond through the upper water pipe under the internal pressure of the biogas; when the liquid level drops to the detection height of the low liquid level switch, the relay controls the valve circuit of the electric valve to close, thereby preventing biogas from entering the aerobic pond through the upper water pipe and affecting the water treatment quality in the aerobic pond.

[0010] In order to effectively collect and utilize the water treated in the aerobic pond;

[0011] As a further improvement of the above technical solution: a drain pipe is installed at the bottom side of the aerobic pond, and a drain valve is installed on the drain pipe.

[0012] The beneficial effect of this improvement is that the water treated in the aerobic pond can be discharged through the drain valve for utilization after the drain valve is opened.

[0013] In order to effectively improve the supporting strength of the waterproof gas collecting hood;

[0014] As a further improvement of the above technical solution: the bottom of the waterproof air collecting hood is a concave spherical structure.

[0015] The beneficial effect of this improvement is that the spherical bottom surface can effectively improve the supporting strength of the waterproof gas collecting hood.

[0016] In order to effectively ensure the sealing of the brick-concrete pool;

[0017] As a further improvement of the above technical solution: the tops of the feed port and the slag outlet are both connected with flange blind plates by bolts.

[0018] The beneficial effect of this improvement is that the setting of the flange blind plate effectively ensures the sealing inside the brick-concrete tank body when there is no need to discharge materials.

[0019] For convenient maintenance and cleaning of the interior of the brick-concrete tank;

[0020] As a further improvement of the above technical solution: an inspection port is installed on the waterproof gas collecting hood, and a manhole cover is connected to the top of the inspection port by bolts.

[0021] The beneficial effect of this improvement is that the provision of the inspection port makes it convenient for personnel to enter the interior of the brick-concrete pond body for inspection work after draining the water in the aerobic pond.

[0022] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the system principle diagram of the present invention;

[0024] Figure 2 It is a cross-sectional structural diagram of a brick-concrete pool body in the present invention;

[0025] In the figure: 1. Brick-concrete tank body; 2. Feed inlet; 3. Slag outlet; 4. Waterproof gas collecting hood; 5. High liquid level switch; 6. Low liquid level switch; 7. Water supply pipe; 8. Electric valve; 9. Drain pipe; 10. Drain valve; 11. Gas collecting pipe; 12. Pressure relief valve; 13. Flange blind plate; 14. Inspection port; 15. Manhole cover; 16. Aerobic pond. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0027] Embodiment 1:

[0028] like Figure 1—2 shows: a novel high-efficiency biogas tank structure, including a brick-concrete tank body 1, the brick-concrete tank body 1 is connected to the bottom ends of the feed inlet 2 and the slag outlet 3, a waterproof gas collecting hood 4 is built inside the brick-concrete tank body 1, a high liquid level switch 5 and a low liquid level switch 6 are installed at intervals above and below the brick-concrete tank body 1 below the waterproof gas collecting hood 4, the brick-concrete tank body 1 below the low liquid level switch 6 is connected to the bottom end of the upper water pipe 7, the upper water pipe 7 is installed with an electric valve 8, the top end of the upper water pipe 7 is connected to the aerobic pond 16 above the waterproof gas collecting hood 4, and the waterproof gas collecting hood 4 is installed with a through-hole. There is a gas collecting pipe 11, and a pressure relief valve 12 is installed on the gas collecting pipe 11. The brick-concrete tank body 1 adopts special materials and technical means to enhance its sealing performance and corrosion resistance, and reduce the leakage of biogas; the electric valve 8 and two sets of liquid level switches are used to automatically separate the biogas slurry by utilizing the internal pressure of the biogas, and the biogas slurry is collected and then merged into the aerobic pond 16 for direct water treatment. The high liquid level switch 5, the low liquid level switch 6, and the electric valve 8 are electrically connected with a relay. When the liquid level of the biogas slurry reaches the detection height of the high liquid level switch 5, the relay controls the valve circuit of the electric valve 8 to open. The biogas in the brick-concrete tank body 1 is pressed into the aerobic pond 16 through the upper water pipe 7 under the internal pressure of the biogas. When the liquid level drops to the detection height of the low liquid level switch 6, the relay controls the valve circuit of the electric valve 8 to close, so as to prevent the biogas from entering the aerobic pond 16 through the upper water pipe 7 and affecting the water treatment quality in the aerobic pond 16. A drain pipe 9 is installed at the bottom side of the aerobic pond 16, and a drain valve 10 is installed on the drain pipe 9. The water treated in the aerobic pond 16 can be discharged through the drain valve 10 after the drain valve 10 is opened. The waterproof gas collecting cover 4 The bottom is a concave spherical structure, and the spherical bottom surface can effectively improve the supporting strength of the waterproof gas collecting hood 4. The tops of the feed port 2 and the slag outlet 3 are both connected with a flange blind plate 13 by bolts. The setting of the flange blind plate 13 effectively ensures the sealing inside the brick-concrete pool body 1 when no material discharge is required. An inspection port 14 is installed on the waterproof gas collecting hood 4, and the top of the inspection port 14 is connected with a manhole cover 15 by bolts. The setting of the inspection port 14 can facilitate personnel to enter the interior of the brick-concrete pool body 1 for maintenance work after emptying the water in the aerobic pond 16.

[0029] The working principle of the technical solution is as follows: open the flange blind plate 13 on the feed inlet 2, put the aquaculture waste into the interior of the brick-concrete tank body 1 through the feed inlet 2, keep the brick-concrete tank body 1 sealed, and under the action of microorganisms, the complex waste undergoes three stages of liquefaction, acid production, and methane production in the brick-concrete tank body 1, and biogas is produced rapidly. The brick-concrete tank body 1 forms a layer of biogas, biogas slurry, and biogas residue from top to bottom. When the internal pressure of the biogas exceeds the pressure relief pressure of the pressure relief valve 12, the biogas is discharged and collected through the gas collecting pipe 11. When the liquid level of the biogas slurry reaches the detection height of the high liquid level switch 5, , the relay controls the valve path of the electric valve 8 to open, and the biogas in the brick-concrete tank body 1 is pressed into the aerobic pond 16 through the upper water pipe 7 under the internal pressure of the biogas. When the liquid level drops to the detection height of the low liquid level switch 6, the relay controls the valve path of the electric valve 8 to close, so as to prevent the biogas from entering the aerobic pond 16 through the upper water pipe 7 and affecting the water treatment quality in the aerobic pond 16; the treated water in the aerobic pond 16 can be discharged and utilized through the drain valve 10 after opening the drain valve 10; the biogas residue in the brick-concrete tank body 1 can be pumped out by inserting the suction hose into the inside of the residue outlet 3.

[0030] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0031] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A new type of high-efficiency biogas digester structure, characterized by: The invention comprises a brick-concrete tank body (1), wherein the brick-concrete tank body (1) is connected to the bottom ends of a feed inlet (2) and a slag outlet (3), a waterproof gas collecting hood (4) is built inside the brick-concrete tank body (1), a high liquid level switch (5) and a low liquid level switch (6) are installed at intervals above and below the brick-concrete tank body (1) below the waterproof gas collecting hood (4), the brick-concrete tank body (1) below the low liquid level switch (6) is connected to the bottom end of a water supply pipe (7), an electric valve (8) is installed on the water supply pipe (7), the top end of the water supply pipe (7) is connected to an aerobic pond (16) above the waterproof gas collecting hood (4), a gas collecting pipe (11) is installed through the waterproof gas collecting hood (4), and a pressure relief valve (12) is installed on the gas collecting pipe (11).

2. A novel high-efficiency biogas digester structure according to claim 1, characterized in that: The high liquid level switch (5), the low liquid level switch (6) and the electric valve (8) are electrically connected to a relay.

3. A novel high-efficiency biogas digester structure according to claim 1, characterized in that: A drainage pipe (9) is installed on the bottom side of the aerobic pond (16), and a drainage valve (10) is installed on the drainage pipe (9).

4. A novel high-efficiency biogas digester structure according to claim 1, characterized in that: The bottom of the waterproof gas collecting cover (4) is a concave spherical structure.

5. A novel high-efficiency biogas digester structure according to claim 1, characterized in that: The tops of the feed port (2) and the slag outlet (3) are both connected with flange blind plates (13) via bolts.

6. A novel high-efficiency biogas digester structure according to claim 1, characterized in that: An inspection port (14) is installed on the waterproof gas collecting hood (4), and a manhole cover (15) is connected to the top of the inspection port (14) via bolts.

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