Forced discharging equipment for anaerobic fermentation system

Abstract

The utility model aims at providing forced discharging equipment for an anaerobic fermentation system, which aims at improving the discharging speed and reducing the energy consumption, the operation complexity and the maintainability, and comprises a fermentation tank, a discharging buffer tank, a compressed air buffer tank and a controller, and the fermentation tank is connected with the discharging buffer tank through a first discharging pipe; the bottom and the upper portion of the discharging buffer tank are connected with a second discharging pipe and an emptying pipe respectively, a compressed air pipe is connected between the compressed air buffer tank and the discharging buffer tank, a two-position three-way valve and a heater are arranged on the compressed air pipe, and the two-position three-way valve is connected with a water feeding device. An air pressure sensor, a liquid level sensor and a cleaning pipe connected with a compressed air pipe are arranged in the discharging buffer tank, electromagnetic switch valves are arranged on the first discharging pipe, the second discharging pipe, the blow-down pipe and the compressed air pipe, high-solid-content undifferentiated discharging can be achieved through vacuumizing and an air compressor, and equipment is convenient to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of fermentation devices, in particular to a forced discharging device for an anaerobic fermentation system. Background Art

[0002] In the traditional anaerobic fermentation process, the materials in the reactor are mainly liquid phase with good fluidity. The solid particles contained are usually relatively small. The materials are pumped in and out. For anaerobic fermentation systems that are mainly solid materials, especially solid waste with longer apparent fibers, the materials are usually forced to be discharged through a discharge pump. For materials with a solid content of less than 12% in the anaerobic fermentation system, a rotor pump or a screw pump that can transport high-concentration materials is usually used in the project to force the discharge. Due to the structural limitations of the pump, solid materials are more likely to gather in the narrow part of the pump body or pipeline, which is easy to block the materials. Then, through the mutual overlap between the solid materials, the aggregated materials filter the discharge gas. The actual discharge concentration is lower than the material concentration in the anaerobic fermentation tank, so that the solid materials accumulate in the tank for a long time, affecting the continuous operation of the anaerobic fermentation process. If a large-diameter pump and pipeline are selected, it will lead to a significant increase in project investment, an increase in installed power, and low equipment utilization. In addition, after the discharge is completed, material residues will be generated, and the equipment will be inconvenient to clean.

[0003] In order to improve the discharge smoothness of solid materials, it is an important demand in the current technical field to develop a forced discharge equipment that can not only increase the discharge speed but also reduce energy consumption and operation complexity. Utility Model Content

[0004] The purpose of the utility model is to provide a forced discharging device for an anaerobic fermentation system to increase the discharging speed, reduce energy consumption and operation complexity and maintainability. To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A forced discharging device for an anaerobic fermentation system, characterized in that it comprises a fermentation tank, a discharging buffer tank, and a compressed air buffer tank, wherein the fermentation tank is connected to the bottom of the discharging buffer tank through a first discharging pipe, the bottom and the upper part of the discharging buffer tank are respectively connected with a second discharging pipe and a venting pipe, the venting pipe is connected to a vacuum system, the compressed air buffer tank is connected with an air compressor, and a compressed air pipe is connected between the compressed air buffer tank and the upper part of the discharging buffer tank, the first discharging pipe, the second discharging pipe, the venting pipe and the compressed air pipe are all provided with an electromagnetic switch valve, a cleaning pipe, an air pressure sensor and a liquid level sensor are provided in the discharging buffer tank, the cleaning pipe is connected to the compressed air pipe and is distributed along the height direction of the inner wall of the discharging buffer tank, a plurality of outlets are provided on the cleaning pipe along the length direction, a two-position three-way valve and a heater are provided on the compressed air pipe, and the inlet of the two-position three-way valve is connected with a water supply device;

[0006] It also includes a controller, the air pressure sensor and the liquid level sensor are connected to the signal input end of the controller, and the air compressor, the two-position three-way solenoid valve, multiple groups of the solenoid switch valves, the heater and the water supply device are connected to the signal output end of the controller.

[0007] Furthermore, a deodorizing box is provided between the vent pipe and the vacuum system.

[0008] Furthermore, the water delivery device includes a water pump and a water tank, the water outlet of the water pump is connected to the inlet of the two-position three-way solenoid valve, and the water pump is connected to the signal output end of the controller.

[0009] Furthermore, a temperature sensor is provided in the discharge buffer tank, and the temperature sensor is connected to a signal input terminal of the controller.

[0010] The beneficial effects of the utility model are:

[0011] 1. By vacuuming, negative pressure is generated in the discharge buffer tank, so that the materials in the anaerobic fermentation tank are quickly transported to the discharge buffer tank, and the materials in the discharge buffer tank are quickly discharged through the compressed air device, which can achieve indiscriminate discharge under high solid content conditions and significantly improve the continuous stability of the anaerobic fermentation process;

[0012] 2. Through the water delivery device, air compressor and cleaning pipe, water and compressed gas are mixed to clean the inside of the discharge buffer tank. The discharge buffer tank after forced discharge can be cleaned to avoid material residue inside;

[0013] 3. After the discharge buffer tank is cleaned, the gas discharged from the air compressor is heated by the installed heater, and the inside of the discharge buffer tank is further sprayed and dried to avoid defects such as rust on the equipment caused by residual water stains, and can effectively improve the cleaning efficiency and utilization efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model

[0015] Among them, 1-anaerobic fermentation tank, 2-discharge buffer tank, 3-compressed air buffer tank, 4-air compressor, 5-first discharge pipe, 6-second discharge pipe, 7-vent pipe, 8-compressed air pipe, 9-cleaning pipe, 10-two-position three-way solenoid valve, 11-water pump, 12-water storage tank, 13-deodorization tank, 14-heater, 15-controller, 16-air pressure sensor, 17-liquid level sensor, 18-temperature sensor, 19-first electromagnetic switch, 20-second electromagnetic switch valve, 21-third electromagnetic switch valve, 22-fourth electromagnetic switch valve. DETAILED DESCRIPTION

[0016] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0017] In the description of the utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the viewing direction or position relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0018] like Figure 1 The forced discharging equipment for the anaerobic fermentation system shown in the figure comprises an anaerobic fermentation tank 1, a discharging buffer tank 2, a compressed air buffer tank 3 and an air compressor 4. A first discharging pipe 5 is arranged at the bottom of the anaerobic fermentation tank 1, and the first discharging pipe 5 is connected to the feed port at the bottom of the discharging buffer tank 2. A second discharging pipe 6 is arranged at the bottom of the discharging buffer tank 2, and a venting pipe 7 is arranged at the upper end. A deodorizing box 13 is connected above the venting pipe 7, and the air outlet of the deodorizing box 13 is connected to the vacuum system. A compressed air pipe 8 is also connected between the venting pipe 7 and the compressed air buffer tank 3. A two-position three-way solenoid valve 10 and a heater 14 are arranged on the compressed air pipe 8. The first inlet and outlet of the two-position three-way solenoid valve 10 are respectively connected to the compressed air pipe 8, and the second inlet is connected to the water outlet of the water pump 11. The water inlet of the water pump 11 is connected to the water storage tank 12. A cleaning pipe 9, an air pressure sensor 16, a liquid level sensor 17 and a temperature sensor 18 are arranged in the compressed air buffer tank 3.

[0019] The first discharge pipe 5, the second discharge pipe 6, the vent pipe 7 and the compressed air pipe 8 are respectively provided with the first solenoid switch valve 19, the second solenoid switch valve 20, the third solenoid switch valve 21 and the fourth solenoid switch valve 22. The fourth solenoid switch valve 22 is located on the compressed air pipe 8 between the two-position three-way solenoid valve 10 and the heater 14.

[0020] The deodorizing box 13 mainly consists of a box body and a filter layer arranged inside the box body. An air inlet and an air outlet are arranged on the box body. The vent pipe 7 is connected to the air inlet of the box body. The air outlet of the box body is connected to the air inlet of the vacuum pump of the vacuum system. The filter layer is an activated carbon filter layer and two groups are arranged at intervals. During the vacuuming process, the fermentation gas in the anaerobic fermentation tank 1 can be pre-deodorized through the deodorizing box 13.

[0021] The heater 14 consists of a shell, an electric heating wire arranged inside the shell, a power supply, and a relay arranged between the electric heating wire and the power supply. The compressed air pipe 8 is connected to the inside of the heater 14 shell. The compressed air pipe 8 can heat the gas inside the heater 14 shell through the electric heating wire, and the switching state of the electric heating wire is controlled by the relay.

[0022] In addition, a controller 15 is also included, and an air pressure sensor 16, a liquid level sensor 17 and a temperature sensor 18 are all connected to the signal input end of the controller 15, and the air compressor 4, the water pump 11, the relay of the heater 14, the first electromagnetic switch valve 19, the second electromagnetic switch valve 20, the third electromagnetic switch valve 21 and the fourth electromagnetic switch valve 22 are all connected to the signal output end of the controller 15.

[0023] The working principle of this device is as follows:

[0024] When discharging is required, first, the controller 15 controls the first electromagnetic switch valve 19, the second electromagnetic switch valve 20, and the fourth electromagnetic switch valve 22 to be closed, and the discharging buffer tank 2 is evacuated by the vacuum pump of the vacuum system; then the first electromagnetic switch valve 19 is opened, so that the material inside the anaerobic fermentation tank 1 quickly enters and fills the discharging buffer tank 2 through the first discharging pipe 5 under the action of the pressure difference, and the material height is detected by the liquid level sensor 17. When the preset material height is reached, the controller 15 closes the fourth electromagnetic switch valve 22, and after the buffer material is balanced, the first electromagnetic switch valve 19 is closed; then, when the discharging buffer tank 2 needs to be discharged, the controller 15 controls the second electromagnetic switch valve 20 and the third electromagnetic switch valve 21 to be opened, and at the same time controls the air compressor 4 to work, and the compressed air enters the discharging buffer tank 2 through the compressed air pipe 4 and the cleaning pipe 9. The material in the discharging buffer tank 2 is discharged to the next process through the second discharging pipe 6 under the action of the pressure difference. When the material level is lower than the preset value, the second electromagnetic switch valve 20 is closed to complete a discharging action.

[0025] Repeat the above discharging action. When the discharging is completed, the controller 15 controls the first electromagnetic switch valve 19 and the third electromagnetic switch valve 21 to close, and the second electromagnetic switch valve 20 and the fourth electromagnetic switch valve 22 to open. At the same time, the air compressor 4 and the water pump 11 are controlled to start, and the compressed gas and water are transported to the discharging buffer tank 2 through the cleaning pipe 9, and the inner wall of the discharging buffer tank 2 is cleaned through the opening on the cleaning pipe 9. After the preset cleaning time is reached, the controller 15 controls the two-position three-way valve 10 to disconnect the second inlet where the water pump 11 is located, and controls the water pump 11 to stop working. At the same time, the controller 15 controls the heater 14 to work, and the gas in the compressed air buffer tank 2 passes through the cleaning pipe 9. After heating by the heater 14, the compressed air enters the discharge buffer tank 2 through the compressed air pipe 8 and the cleaning pipe 9. When the temperature sensor 18 detects that the internal temperature of the discharge buffer tank 2 reaches the preset temperature, the controller 15 controls the relay of the heater 14 to disconnect, and continues to introduce compressed gas into the discharge buffer tank 2 for a set time. The discharge buffer tank 2 is blown by the heated compressed gas, which can not only quickly discharge the moisture in the discharge buffer tank 2 through the second discharge pipe 6, but also quickly dry the water droplets attached to the inner wall, so as to achieve the purpose of quickly cleaning and drying the discharge buffer tank 2, thereby improving the cleaning efficiency of the discharge device and the equipment utilization efficiency.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A forced discharging device for an anaerobic fermentation system, characterized in that: It includes a fermentation tank, a discharging buffer tank, and a compressed air buffer tank. The fermentation tank is connected to the bottom of the discharging buffer tank through a first discharging pipe. The bottom and the upper part of the discharging buffer tank are respectively connected with a second discharging pipe and a venting pipe. The venting pipe is connected to a vacuum system. The compressed air buffer tank is connected to an air compressor, and a compressed air pipe is connected between the compressed air buffer tank and the upper part of the discharging buffer tank. The first discharging pipe, the second discharging pipe, the venting pipe and the compressed air pipe are all provided with electromagnetic switch valves. A cleaning pipe, an air pressure sensor and a liquid level sensor are provided in the discharging buffer tank. The cleaning pipe is connected to the compressed air pipe and is distributed along the height direction of the inner wall of the discharging buffer tank. A plurality of outlets are provided on the cleaning pipe along the length direction. A two-position three-way valve and a heater are provided on the compressed air pipe. The inlet of the two-position three-way valve is connected with a water supply device. And a controller, the air pressure sensor and the liquid level sensor are connected to the signal input end of the controller, and the air compressor, the two-position three-way solenoid valve, multiple groups of the solenoid switch valves, the heater and the water supply device are connected to the signal output end of the controller.

2. The forced discharging device for an anaerobic fermentation system according to claim 1, characterized in that: A deodorizing box is arranged between the venting pipe and the vacuum system.

3. The forced discharging device for an anaerobic fermentation system according to claim 1, characterized in that: The water delivery device comprises a water pump and a water storage tank. The water outlet of the water pump is connected to the inlet of a two-position three-way electromagnetic valve, and the water pump is connected to the signal output end of the controller.

4. The forced discharging device for an anaerobic fermentation system according to claim 1, characterized in that: A temperature sensor is arranged in the discharging buffer tank, and the temperature sensor is connected to the signal input end of the controller.

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