Automatic water replenishing device of anaerobic reaction tank positive and negative pressure protector

Abstract

The utility model discloses an automatic water replenishing device of anaerobic reaction tank positive and negative pressure protector relates to anaerobic fermentation technical field, including water replenishing tank and positive and negative pressure protector, the top one side of water replenishing tank is connected with the inlet pipe, and one end that the inlet pipe is located in water replenishing tank is connected with the float ball valve, and the bottom of water replenishing tank is connected with positive and negative pressure protector through liquid supply pipe, and the liquid pump is connected in series on the liquid supply pipe, the outside fixed connection of positive and negative pressure protector has the transparent liquid level tube that communicates with its inner chamber, both ends of transparent liquid level tube are equipped with liquid level sensor, and liquid level sensor and liquid pump are connected with controller respectively, and the controller is configured as according to two liquid level sensor's signal control liquid pump opening and closing. This automatic water replenishing device of anaerobic reaction tank positive and negative pressure protector can realize accurate, fast water replenishing, avoids the positive and negative pressure protector and causes marsh gas leakage because of water shortage, and protects the safety of anaerobic reaction tank.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic fermentation technology, specifically to an automatic water replenishment device for a positive and negative pressure protector of an anaerobic reactor. Background Technology

[0002] Anaerobic reactors come in various types. To ensure reactor safety, large and medium-sized biogas projects often use steel anaerobic tanks equipped with positive and negative pressure protectors. These protectors maintain a certain water level, with biogas branch pipes extending below the liquid surface to maintain stable pressure within the tank. Under normal conditions, biogas will not overflow due to the water seal, and air will not enter the tank. When the pressure inside the tank is high, the biogas forces water out of the protector, causing biogas to leak out. When the pressure inside the tank drops to a negative pressure, the biogas pipe draws water from the protector into the tank, thus breaking the water seal and drawing air into the tank to counteract the negative pressure. After the positive and negative pressure protector activates, the liquid level inside the protector may decrease, or it may decrease due to evaporation. In either case, water must be added promptly to maintain liquid level balance.

[0003] Because anaerobic reactors are often quite tall, the following disadvantages may occur: ① Operators cannot stay on top of the tank for extended periods. If the water shortage in the protector is not detected and water is not replenished in time, biogas leakage may occur; ② In some projects, the tap water pressure is insufficient to reach the top of the tank. Manual water replenishment requires carrying water up to the top of the tank, which is inefficient and labor-intensive.

[0004] Therefore, it is necessary to propose an automatic water replenishment device for the positive and negative pressure protection of anaerobic reactors to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved The purpose of this invention is to provide an automatic water replenishment device for the positive and negative pressure protector of an anaerobic reactor, so as to solve the problems mentioned in the background art.

[0006] (II) Technical Solution To achieve the above objectives, this utility model is implemented through the following technical solution: an automatic water replenishment device for a positive and negative pressure protector of an anaerobic reactor, comprising a water replenishment tank and a positive and negative pressure protector, wherein a water inlet pipe is connected to one side of the top of the water replenishment tank, a float valve is connected to one end of the water inlet pipe located inside the water replenishment tank, and the bottom of the water replenishment tank is connected to the positive and negative pressure protector through a liquid supply pipe, wherein a liquid pump is connected in series on the liquid supply pipe; The positive and negative pressure protector is fixedly connected to a transparent liquid level tube that communicates with its inner cavity. Liquid level sensors are provided at both the upper and lower ends of the transparent liquid level tube. The liquid level sensors and the liquid pump are respectively connected to the controller. The controller is configured to control the start and stop of the liquid pump according to the signals from the two liquid level sensors.

[0007] Preferably, the controller is configured to: start the liquid pump when the liquid level sensor at the lower end of the transparent liquid level tube does not detect liquid; and stop the liquid pump when the liquid level sensor at the upper end of the transparent liquid level tube detects liquid.

[0008] Preferably, the outlet end of the liquid pump is equipped with a check valve.

[0009] Preferably, the liquid pump inlet end is provided with a liquid valve, and the two liquid supply pipes between the liquid valve and the liquid pump are connected by a flexible joint.

[0010] Preferably, the controller, water tank, and liquid pump are all fixedly connected inside the cabinet, a cabinet door is provided on one side of the cabinet, and a support is fixedly connected to the bottom of the cabinet.

[0011] Preferably, the top of the water tank is provided with a vent.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides an automatic water replenishment device for the positive and negative pressure protector of an anaerobic reactor, which has the following beneficial effects: 1. The automatic water replenishment device of the positive and negative pressure protector of the anaerobic reactor, by setting up a water replenishment tank, a liquid pump and a liquid level sensor, can achieve accurate and rapid water replenishment, avoid biogas leakage caused by water shortage of the positive and negative pressure protector, and protect the safety of the anaerobic reactor.

[0013] 2. The automatic water replenishment device of the positive and negative pressure protector of the anaerobic reactor solves the problem of insufficient tap water pressure that cannot reach the top of the tank by setting up a liquid pump to pressurize and supply water.

[0014] 3. The automatic water replenishment device of the positive and negative pressure protector of the anaerobic reactor, by setting up a water replenishment tank to store water, can buffer for a certain period of time even if the external tap water is interrupted, and will not fail due to the external water interruption, thereby ensuring the safe operation of the anaerobic project. Attached Figure Description

[0015] Figure 1 This is a schematic front cross-sectional view of the structure of this utility model; Figure 2 This is a front view schematic diagram of the positive and negative pressure protector of this utility model; Figure 3 This is a front view schematic diagram of the cabinet of this utility model.

[0016] In the diagram: 1. Controller; 2. Cabinet; 3. Float valve; 4. Water tank; 5. Inlet pipe; 6. Liquid pump; 7. Liquid supply pipe; 8. Check valve; 9. Support; 10. Union; 11. Liquid valve; 12. Positive and negative pressure protector; 13. Liquid level sensor; 14. Transparent liquid level tube; 15. Cabinet door. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please see Figure 1-3 As shown, an automatic water replenishment device for a positive and negative pressure protector of an anaerobic reactor includes a water replenishment tank 4 and a positive and negative pressure protector 12. A water inlet pipe 5 is connected to one side of the top of the water replenishment tank 4. A float valve 3 is connected to one end of the water inlet pipe 5 inside the water replenishment tank 4. The bottom of the water replenishment tank 4 is connected to the positive and negative pressure protector 12 through a liquid supply pipe 7. A liquid pump 6 is connected in series on the liquid supply pipe 7. A transparent liquid level pipe 14 communicating with the inner cavity of the positive and negative pressure protector 12 is fixedly connected to the outside of the positive and negative pressure protector 12. Liquid level sensors 13 are provided at both the upper and lower ends of the transparent liquid level pipe 14. The liquid level sensors 13 and the liquid pump 6 are respectively connected to a controller 1. The controller 1 is configured to control the opening and closing of the liquid pump 6 according to the signals of the two liquid level sensors 13.

[0019] Specifically, controller 1 is configured to: start liquid pump 6 when liquid level sensor 13 at the lower end of transparent liquid level tube 14 does not detect liquid; and stop liquid pump 6 when liquid level sensor 13 at the upper end of transparent liquid level tube 14 detects liquid. The installation height of liquid level sensor 13 at the lower end should be greater than the minimum liquid level required by the water seal of positive and negative pressure protector 12.

[0020] In use, the inlet pipe 5 is connected to the tap water pipe, and water enters the water replenishment tank 4 through the inlet pipe 5. As the liquid level in the water replenishment tank 4 rises, the float of the float valve 3 rises accordingly. When it rises to a certain position, it supports the rubber piston pad through the connecting rod, sealing the water source. When the water level drops, the float also drops, and the connecting rod drives the piston pad to open, ensuring that the water replenishment tank 4 is always full of water. When the liquid level sensor 13 at the lower end of the transparent liquid level tube 14 does not detect liquid, the controller 1 controls the start of the liquid pump 6 to pump water from the water replenishment tank 4 into the positive and negative pressure protector 12. The liquid level in the transparent liquid level tube 14 rises synchronously with the liquid level in the positive and negative pressure protector 12. When the liquid level sensor 13 at the upper end of the transparent liquid level tube 14 detects liquid, the controller 1 controls the stop of the liquid pump 6. This device can achieve precise and rapid water replenishment, avoiding biogas leakage caused by water shortage in the positive and negative pressure protector 12, and protecting the safety of the anaerobic reactor.

[0021] By setting up a liquid pump 6 to pressurize the water supply, the problem of insufficient tap water pressure preventing it from reaching the top of the tank is solved; by setting up a water replenishment tank 4 to store water, even if the external tap water supply is interrupted, it can buffer for a certain period of time and will not fail due to the external water supply interruption, thus ensuring the safe operation of the anaerobic project.

[0022] To prevent water in the supply pipe 7 from flowing back under gravity after the liquid pump 6 is turned off, causing the water tank 4 to overflow, a check valve 8 is provided at the outlet of the liquid pump 6.

[0023] To facilitate maintenance of the liquid pump 6, a liquid valve 11 is provided at the liquid inlet end of the liquid pump 6. The two sections of the liquid supply pipe 7 between the liquid valve 11 and the liquid pump 6 are connected by a union 10. When maintaining the liquid pump 6, the liquid valve 11 is closed, and the union 10 is provided to facilitate the disconnection and reconnection of the liquid supply pipe 7 between the water tank 4 and the liquid pump 6.

[0024] Specifically, the controller 1, water tank 4, and liquid pump 6 are all fixedly connected inside the cabinet 2. A cabinet door 15 is located on one side of the cabinet 2, and a support 9 is fixedly connected to the bottom of the cabinet 2. The cabinet 2 provides protection, effectively preventing external dust and rainwater from entering and extending its service life.

[0025] In order to balance the air pressure inside and outside the water tank 4, a vent is provided at the top of the water tank 4.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic water replenishment device for a positive and negative pressure protector of an anaerobic reactor, comprising a water replenishment tank (4) and a positive and negative pressure protector (12), characterized in that: The top side of the water tank (4) is connected to an inlet pipe (5), and the end of the inlet pipe (5) inside the water tank (4) is connected to a float valve (3). The bottom of the water tank (4) is connected to a positive and negative pressure protector (12) through a liquid supply pipe (7). A liquid pump (6) is connected in series on the liquid supply pipe (7). The positive and negative pressure protector (12) is fixedly connected to a transparent liquid level tube (14) that communicates with its inner cavity. Liquid level sensors (13) are provided at both the upper and lower ends of the transparent liquid level tube (14). The liquid level sensors (13) and the liquid pump (6) are respectively connected to the controller (1). The controller (1) is configured to control the liquid pump (6) to start and stop according to the signals of the two liquid level sensors (13).

2. The automatic water replenishment device for the positive and negative pressure protector of an anaerobic reactor according to claim 1, characterized in that: The controller (1) is configured to: control the liquid pump (6) to start when the liquid level sensor (13) at the lower end of the transparent liquid level tube (14) does not detect liquid; and control the liquid pump (6) to stop when the liquid level sensor (13) at the upper end of the transparent liquid level tube (14) detects liquid.

3. The automatic water replenishment device for the positive and negative pressure protector of an anaerobic reactor according to claim 1, characterized in that: The liquid pump (6) is equipped with a check valve (8) at its outlet.

4. The automatic water replenishment device for the positive and negative pressure protector of an anaerobic reactor according to claim 1, characterized in that: The liquid pump (6) is equipped with a liquid valve (11) at the inlet end, and the two supply pipes (7) between the liquid valve (11) and the liquid pump (6) are connected by a union (10).

5. The automatic water replenishment device for the positive and negative pressure protector of an anaerobic reactor according to claim 1, characterized in that: The controller (1), water tank (4) and liquid pump (6) are all fixedly connected inside the cabinet (2). The cabinet (2) has a cabinet door (15) on one side and a support (9) is fixedly connected to the bottom of the cabinet (2).

6. The automatic water replenishment device for the positive and negative pressure protector of an anaerobic reactor according to claim 1, characterized in that: The top of the water supply tank (4) is provided with a vent.

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