Anaerobic fermentation conditioning tank and anaerobic fermentation system

Abstract

This utility model discloses an anaerobic fermentation regulating tank and an anaerobic fermentation system. The anaerobic fermentation regulating tank includes a tank body and multiple heat exchange devices. The tank body has a regulating cavity and an inlet and an outlet connecting to the regulating cavity. Multiple heat exchange devices are arranged vertically in sequence within the regulating cavity. Each heat exchange device has a heat exchange cavity and an inlet and an outlet connecting to the heat exchange cavity. The inlet and outlet are located outside the tank body. The heat exchange medium can flow into the heat exchange cavity through the inlet and flow out of the heat exchange cavity through the outlet. The anaerobic fermentation system includes a heat exchanger, an anaerobic fermentation regulating tank, and an anaerobic fermentation tank connected in sequence. Compared with the prior art, the anaerobic fermentation system provided by this utility model, based on existing heat exchangers, utilizes an anaerobic fermentation regulating tank and sets up heat exchange devices within the regulating tank, forming a two-stage heat exchange effect between the heat exchanger and the heat exchange devices. This reduces the temperature difference of a single heat exchange and greatly alleviates scaling and crystallization on the pipe wall.

Description

Technical Field

[0001] This utility model relates to the field of kitchen waste treatment technology, specifically to an anaerobic fermentation regulating tank and an anaerobic fermentation system. Background Technology

[0002] Currently, the anaerobic fermentation process for food waste typically operates at around 38℃. After being drained at food waste treatment plants, the waste undergoes coarse sorting of large debris such as plastic bags and bottles using various equipment. The solid phase is then further separated by crushing, cooking, and pressing. The material is usually heated to 80℃ to extract as much cooking oil as possible to increase economic efficiency. At this temperature, the waste cannot directly enter the anaerobic fermentation system and requires heat exchange and cooling before anaerobic fermentation.

[0003] However, in actual production, due to the large temperature difference between the 80°C high-temperature material and the circulating water of the heat exchanger, scaling and crystallization occur on both the inside and outside of the cooling heat exchange surface, affecting the heat exchange efficiency. In some cases, under extremely unfavorable conditions in summer, it is impossible to meet the conditions for mesophilic anaerobic fermentation. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an anaerobic fermentation regulating tank and anaerobic fermentation system to solve the technical problems of excessive temperature difference in heat exchangers, which easily lead to scaling and crystallization.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model provides an anaerobic fermentation regulating tank, comprising: a tank body and multiple heat exchange devices.

[0007] The tank has an adjustment chamber and an inlet and an outlet that communicate with the adjustment chamber;

[0008] Multiple heat exchange devices are arranged sequentially in the regulating cavity along the vertical direction. Each heat exchange device has a heat exchange cavity and an inlet and an outlet communicating with the heat exchange cavity. The inlet and outlet are located outside the tank body. The heat exchange medium can flow into the heat exchange cavity through the inlet and flow out of the heat exchange cavity through the outlet.

[0009] In some embodiments, the heat exchange device includes an inlet pipe, a heat exchange tube, and an outlet pipe connected in sequence. The inlet pipe and the outlet pipe pass through the tank body and are sealed to the tank body. The inlet pipe has the inlet, the outlet pipe has the outlet, and the heat exchange tube is cylindrical and spiral.

[0010] In some embodiments, the horizontal cross-section of the tank is also circular, and the heat exchange tubes are arranged coaxially with the tank.

[0011] In some embodiments, the inlet pipe is located below the outlet pipe, the lower end of the heat exchange tube is connected to the inlet pipe, and the upper end of the heat exchange tube is connected to the outlet pipe.

[0012] In some embodiments, the heat exchange device further includes a backwash inlet pipe and a backwash outlet pipe located outside the tank body, the backwash inlet pipe being connected to the inlet pipe and the backwash outlet pipe being connected to the outlet pipe.

[0013] In some embodiments, a valve is provided on the side of the backwash inlet pipe near the inlet pipe, and a valve is provided on the side of the backwash outlet pipe near the outlet pipe.

[0014] In some embodiments, the inlet pipe is provided with a valve on the side of the backwash inlet pipe away from the tank, and the outlet pipe is provided with a valve on the side of the backwash outlet pipe away from the tank.

[0015] In some embodiments, the system further includes multiple connecting brackets, each connecting bracket including a connecting rod and a connecting ring. One end of the connecting rod is fixedly connected to the inner wall of the tank, and the other end is fixedly connected to the connecting ring, which is fixedly sleeved on the heat exchange tube.

[0016] In some embodiments, a safety valve is also provided on the top surface of the tank.

[0017] Secondly, this utility model also provides an anaerobic fermentation system, comprising a heat exchanger, an anaerobic fermentation regulating tank, and an anaerobic fermentation tank connected in sequence.

[0018] Compared with the prior art, the anaerobic fermentation system provided by this utility model utilizes an anaerobic fermentation regulating tank based on the existing heat exchanger, and sets up a heat exchange device in the regulating tank to form a two-stage heat exchange effect of heat exchanger and heat exchange device, thereby reducing the temperature difference of a single heat exchange and greatly alleviating the scaling and crystallization phenomenon on the pipe wall. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the anaerobic fermentation regulating tank provided in this embodiment of the utility model;

[0020] Figure 2 This is a top view of the anaerobic fermentation regulating tank provided in this embodiment of the utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] To address the technical problem of excessive temperature difference in heat exchangers leading to scaling and crystallization, this invention provides an anaerobic fermentation regulating tank and anaerobic fermentation system. It utilizes existing anaerobic fermentation regulating tanks and installs a heat exchange device within the regulating tank, creating a two-stage heat exchange effect between the heat exchanger and the heat exchange device. This reduces the temperature difference during a single heat exchange and significantly alleviates scaling and crystallization on the pipe walls.

[0023] Please see Figure 1 and Figure 2 The anaerobic fermentation regulating tank includes: tank body 1 and multiple heat exchange devices 2.

[0024] Tank 1 has an adjustment chamber and an inlet and an outlet that connect to the adjustment chamber. The kitchen waste that has been pre-treated enters the adjustment chamber through the inlet. After being adjusted to a state suitable for anaerobic fermentation in the adjustment chamber, it is discharged from the outlet into the anaerobic fermentation tank for fermentation.

[0025] Multiple heat exchange devices 2 are arranged vertically in sequence within the regulating chamber. Each heat exchange device 2 has a heat exchange chamber and an inlet 2A and an outlet 2B connecting to the heat exchange chamber. The inlet 2A and outlet 2B are located outside the tank body 1 and are used to connect to other circulation equipment. The heat exchange medium is driven to flow into the heat exchange chamber through the inlet 2A and out of the heat exchange chamber through the outlet 2B to achieve heat exchange and cool down the kitchen waste. The heat exchange medium can be clean water.

[0026] Furthermore, because the anaerobic fermentation regulating tank acts as a buffer and regulator, the amount of kitchen waste inside tank 1 will fluctuate. By setting multiple heat exchange devices 2 along the vertical direction, the heat exchange devices 2 can be turned on or off according to the amount of kitchen waste inside tank 1, so that the heat exchange devices 2 can achieve the best heat exchange effect.

[0027] Existing anaerobic fermentation systems consist of a heat exchanger, an anaerobic fermentation regulating tank, and an anaerobic fermentation tank connected in sequence. The heat exchanger performs a single heat exchange and cooling process on the food waste. However, due to the large temperature difference, the heat exchanger is prone to scaling and crystallization. This application addresses this by installing a heat exchange device 2 within the existing anaerobic fermentation regulating tank, which, together with the heat exchanger, performs a two-stage heat exchange and cooling process on the food waste. This reduces the temperature difference in a single heat exchange, significantly mitigating scaling and crystallization. Furthermore, because it is an improvement on the existing anaerobic fermentation regulating tank, the adjustments to the entire anaerobic fermentation system are minimal, making it easy to implement and promote.

[0028] In some embodiments, the horizontal cross-section of the tank 1 is circular, and the side of the tank 1 has an observation window or a level gauge for determining the amount of kitchen waste inside the tank 1.

[0029] In some embodiments, a safety valve 11 is also provided on the top surface of the tank 1 to discharge excess gas generated by kitchen waste and prevent excessive pressure inside the tank 1.

[0030] In some embodiments, the heat exchange device 2 includes an inlet pipe 21, a heat exchange tube 22, and an outlet pipe 23 connected in sequence. The inlet pipe 21 and the outlet pipe 23 pass through the tank body 1 and are sealed to the tank body 1. The inlet pipe 21 and the outlet pipe 23 are used to connect to an external heat exchange medium circulation device. The inlet pipe 21 has an inlet 2A, and the outlet pipe 23 has an outlet 2B. The inlet 2A and the outlet 2B adopt an interface form that is easy to connect and disassemble, such as a flange or other quick-release interface. The heat exchange tube 22 is a cylindrical spiral shape.

[0031] In a preferred embodiment, the heat exchange tube 22 is arranged coaxially with the tank body 1.

[0032] In some embodiments, the inlet pipe 21 is located below the outlet pipe 23, the lower end of the heat exchange pipe 22 is connected to the inlet pipe 21, and the upper end of the heat exchange pipe 22 is connected to the outlet pipe 23.

[0033] In some embodiments, the heat exchange device 2 further includes a backwash inlet pipe 24 and a backwash outlet pipe 25 located outside the tank 1. The backwash inlet pipe 24 is connected to the inlet pipe 21, and the backwash outlet pipe 25 is connected to the outlet pipe 23. The backwash inlet pipe 24 and the backwash outlet pipe 25 are used to connect to external backwashing equipment to flush and descale the heat exchange tube 22.

[0034] In some embodiments, a valve 3 is provided on the side of the backwash inlet pipe 24 near the inlet pipe 21, and a valve 3 is provided on the side of the backwash outlet pipe 25 near the outlet pipe 23. A valve 3 is provided on the side of the backwash inlet pipe 24 away from the tank 1, and a valve 3 is provided on the side of the backwash outlet pipe 25 away from the tank 1.

[0035] During heat exchange, valves 3 on inlet pipe 21 and outlet pipe 23 are open, while valves 3 on backwash inlet pipe 24 and backwash outlet pipe 25 are closed. During backwashing, valves 3 on inlet pipe 21 and outlet pipe 23 are closed, while valves 3 on backwash inlet pipe 24 and backwash outlet pipe 25 are open.

[0036] In some embodiments, the anaerobic fermentation regulating tank further includes multiple connecting brackets 4. Each connecting bracket 4 includes a connecting rod 41 and a connecting ring 42. One end of the connecting rod 41 is fixedly connected to the inner wall of the tank body 1, and the other end is fixedly connected to the connecting ring 424. The connecting ring 424 is fixedly sleeved on the heat exchange tube 22.

[0037] This invention also provides an anaerobic fermentation system, comprising a heat exchanger, an anaerobic fermentation regulating tank, and an anaerobic fermentation vessel connected in sequence. The anaerobic fermentation regulating tank is the anaerobic fermentation regulating tank in any of the above embodiments. The heat exchange device 2 and the heat exchanger in the anaerobic fermentation regulating tank work together to perform two heat exchange and cooling processes on the kitchen waste. This reduces the temperature difference in a single heat exchange, greatly alleviating scaling and crystallization. Furthermore, since it is an improvement on an existing anaerobic fermentation regulating tank, the adjustments to the entire anaerobic fermentation system are minimal, making it easy to implement and promote.

[0038] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An anaerobic fermentation regulating tank, characterized in that, include: A tank body having an adjustment chamber and an inlet and an outlet communicating with the adjustment chamber; as well as Multiple heat exchange devices are arranged sequentially in the regulating cavity along a vertical direction. Each heat exchange device has a heat exchange cavity and an inlet and an outlet communicating with the heat exchange cavity. The inlet and outlet extend to the outside of the tank body. The heat exchange medium can flow into the heat exchange cavity through the inlet and flow out of the heat exchange cavity through the outlet.

2. The anaerobic fermentation regulating tank according to claim 1, characterized in that, The heat exchange device includes an inlet pipe, a heat exchange pipe, and an outlet pipe connected in sequence. The inlet pipe and the outlet pipe pass through the tank body and are sealed to the tank body. The inlet pipe has the inlet, and the outlet pipe has the outlet. The heat exchange pipe is cylindrical and spiral.

3. The anaerobic fermentation regulating tank according to claim 2, characterized in that, The horizontal cross-section of the tank is also circular, and the heat exchange tube is arranged coaxially with the tank.

4. The anaerobic fermentation regulating tank according to claim 2, characterized in that, The inlet pipe is located below the outlet pipe, the lower end of the heat exchange tube is connected to the inlet pipe, and the upper end of the heat exchange tube is connected to the outlet pipe.

5. The anaerobic fermentation regulating tank according to claim 2, characterized in that, The heat exchange device also includes a backwash inlet pipe and a backwash outlet pipe located outside the tank body. The backwash inlet pipe is connected to the inlet pipe, and the backwash outlet pipe is connected to the outlet pipe.

6. The anaerobic fermentation regulating tank according to claim 2, characterized in that, A valve is provided on the side of the backwash inlet pipe near the inlet pipe, and a valve is provided on the side of the backwash outlet pipe near the outlet pipe.

7. The anaerobic fermentation regulating tank according to claim 2, characterized in that, The inlet pipe is equipped with a valve on the side of the backwash inlet pipe away from the tank body, and the outlet pipe is equipped with a valve on the side of the backwash outlet pipe away from the tank body.

8. The anaerobic fermentation regulating tank according to claim 2, characterized in that, It also includes multiple connecting brackets, each of which includes a connecting rod and a connecting ring. One end of the connecting rod is fixedly connected to the inner wall of the tank, and the other end is fixedly connected to the connecting ring. The connecting ring is fixedly sleeved on the heat exchange tube.

9. The anaerobic fermentation regulating tank according to claim 2, characterized in that, A safety valve is also installed on the top surface of the tank.

10. An anaerobic fermentation system, characterized in that, It includes a heat exchanger, an anaerobic fermentation regulating tank and an anaerobic fermentation tank as described in any one of claims 1-9, connected in sequence.

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