Circulating tank unit and edible oil production system

Abstract

This utility model relates to the technical field of edible oil processing equipment, specifically to a circulating tank device and a food oil production system. The circulating tank device is used in the food oil production system, and is located downstream of the second oil inlet pipeline in components and equipment, such as a heat exchanger. In case of a malfunction, the first valve can be closed, allowing fluid to circulate between a portion of the second oil inlet pipeline, the second circulating pipeline, the circulating tank, the first circulating pipeline, and a portion of the first oil inlet pipeline. This allows for maintenance of the downstream components of the second oil inlet pipeline without shutting down the heater, reducing the frequency of heater start-ups and shutdowns and minimizing energy consumption increases caused by frequent heater starts and shutdowns.

Description

Technical Field

[0001] This utility model relates to the technical field of edible oil processing equipment, and more specifically, to a circulating tank device and a food oil production system. Background Technology

[0002] The processing of edible oils provided by related technologies (such as the processing of Sichuan pepper oil and rattan pepper oil) usually requires the use of crude oil to be processed (such as rapeseed oil) at a set temperature to soak and extract the raw materials (such as Sichuan pepper powder or rattan pepper). This requires the use of a heater to heat the crude oil to be processed before the extraction of the raw materials.

[0003] However, when the food oil production system provided by the relevant technology malfunctions and needs maintenance, the entire food oil production system needs to be shut down and restarted after maintenance is completed. This can easily increase energy consumption due to the frequent start-up and shutdown of the whole system. Utility Model Content

[0004] The purpose of this utility model is to provide a circulating tank device and a food oil production system. The circulating tank device can be used in the food oil production system. When other components or equipment in the food oil production system, except for the heater of the circulating tank device, malfunction or need maintenance, maintenance can be carried out on other components or equipment without shutting down the heater of the circulating tank device, thereby reducing the frequency of heater start-up and shutdown and helping to save energy.

[0005] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a circulating tank device, comprising: First oil inlet pipeline; A heater is installed in the first oil inlet pipe and is used to heat the fluid transported in the first oil inlet pipe. The second oil inlet line is connected to the first oil inlet line and is used to replace the first oil inlet line to transport the fluid heated by the heater. A heat exchanger is installed in the second oil inlet pipe and is distributed downstream of the heater along the direction of fluid transport in the second oil inlet pipe. The circulating tank is connected to the first oil inlet pipe through the first circulating pipe and to the second oil inlet pipe through the second circulating pipe. A first valve is installed in the second oil inlet pipeline; along the direction of fluid transport in the second oil inlet pipeline, the first valve is located downstream of the connection between the second circulation pipeline and the second oil inlet pipeline, and upstream of the heat exchanger; wherein, When the first valve is closed, the fluid heated by the heater in the first oil inlet line can circulate between a portion of the second oil inlet line, the second circulation line, the circulation tank, the first circulation line, and a portion of the first oil inlet line.

[0006] In an optional embodiment, the circulating tank device further includes a second valve, which is disposed in the first oil inlet pipeline; the second valve is located upstream of the connection between the first circulating pipeline and the first oil inlet pipeline in the direction of fluid transport along the first oil inlet pipeline.

[0007] In an optional embodiment, the circulation tank device further includes a third valve disposed in the second circulation pipeline.

[0008] In an optional embodiment, the circulation tank device further includes a fourth valve disposed in the first circulation pipeline.

[0009] In an optional embodiment, the circulating tank device further includes a third oil inlet line, which is connected to the second oil inlet line and is used to replace the second oil inlet line in transporting the fluid that has undergone heat exchange in the heat exchanger.

[0010] In an optional embodiment, the circulating tank device further includes a third circulating pipeline connected between the third oil inlet pipeline and the circulating tank, so that fluid in the third oil inlet pipeline can flow into the circulating tank.

[0011] In an optional embodiment, the circulating tank device further includes a pressure relief valve located in the third circulating pipeline.

[0012] In an optional embodiment, the circulating tank device further includes a buffer tank, a fourth circulating pipeline, an oil outlet pipeline, a fifth valve, and a sixth valve; the third oil inlet pipeline is connected to the buffer tank, which is used to temporarily store the fluid that has undergone heat exchange in the heat exchanger. The buffer tank is connected to the circulation tank via a fourth circulation pipeline, and the buffer tank is also connected to the downstream process via an oil outlet pipeline. The fifth valve is located in the fourth circulation pipeline; the sixth valve is located in the oil outlet pipeline. When the fifth valve is open and the sixth valve is closed, the fluid in the buffer tank is transported to the circulation tank through the fourth circulation pipeline; When the fifth valve is closed and the sixth valve is open, the fluid in the buffer tank is transported to the downstream process through the oil outlet pipeline.

[0013] In an optional embodiment, the circulating tank device further includes a temperature sensor disposed in the buffer tank for detecting the temperature of the fluid inside the buffer tank.

[0014] Secondly, this utility model provides a food oil production system, including a circulating tank device according to any of the aforementioned embodiments.

[0015] The beneficial effects of the circulating tank device provided in this embodiment of the utility model include: when the components and equipment downstream of the second oil inlet pipeline, such as the heat exchanger, malfunction, the first valve can be closed, allowing the fluid to circulate between a portion of the second oil inlet pipeline, the second circulating pipeline, the circulating tank, the first circulating pipeline, and a portion of the first oil inlet pipeline; thus, the components downstream of the second oil inlet pipeline can be maintained without shutting down the heater, which helps to reduce the frequency of heater start-up and shutdown and reduce the increase in energy consumption caused by frequent heater start-up and shutdown.

[0016] The food oil production system provided by this utility model embodiment includes all the beneficial effects of the aforementioned circulating tank device, such as: it can maintain the components downstream of the second oil inlet pipeline without shutting down the heater, which helps to reduce the frequency of heater start-up and shutdown and reduce the increase in energy consumption caused by frequent heater start-up and shutdown. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the food oil production system in an embodiment of this utility model; Figure 2 This is a partial structural diagram of the food oil production system in an embodiment of this utility model.

[0019] Icons: 010 - Edible oil production system; 110 - First oil inlet pipeline; 120 - Second oil inlet pipeline; 130 - Third oil inlet pipeline; 210 - Heater; 220 - Heat exchanger; 300 - Circulation tank; 310 - First circulation pipeline; 320 - Second circulation pipeline; 330 - Third circulation pipeline; 331 - Pressure relief valve; 340 - Fourth circulation pipeline; 410 - First valve; 420 - Second valve; 430 - Third valve; 440 - Fourth valve; 450 - Fifth valve; 460 - Sixth valve; 500 - Buffer tank; 510 - Oil outlet pipeline; 600 - Extraction equipment. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] The edible oil production system provided by the related technology includes an oil supply pipeline, a heater, a heat exchanger, and an extraction device. The heater and heat exchanger are both installed in the oil supply pipeline. The heater heats the crude oil to be processed in the oil supply pipeline, and the heat exchanger is used to exchange heat with the heated crude oil in the oil supply pipeline so that the temperature of the crude oil to be processed reaches the set temperature. The oil supply pipeline is also connected to the extraction device to transport the heated crude oil to the extraction device for extraction of the raw material to obtain the finished oil.

[0027] However, the inventors discovered that when components and equipment such as heat exchangers and extraction equipment downstream of the oil supply pipeline malfunction, the entire food oil production system needs to be shut down before maintenance of the corresponding components and equipment can be carried out. Among these, the heaters start and stop with the food oil production system, and the energy consumption of the heaters is particularly high during the start-up phase. Increasing the frequency of heater start-up and shutdown will lead to an overall increase in energy consumption.

[0028] To address the aforementioned issues, this embodiment provides a circulating tank device and an edible oil production system. The circulating tank device can be used in the edible oil production system. When other components or equipment in the edible oil production system, excluding the heater of the circulating tank device, malfunction or require maintenance, maintenance can be performed on these other components or equipment without shutting down the heater of the circulating tank device. This reduces the frequency of heater start-up and shutdown, thus saving energy.

[0029] The circulating tank device and edible oil production system of this embodiment will be described in detail below with reference to the accompanying drawings.

[0030] Please refer to Figure 1 The food oil production system 010 of this embodiment includes a circulation tank device; the circulation tank device includes a first oil inlet pipe 110, a heater 210, a second oil inlet pipe 120, a heat exchanger 220, a circulation tank 300, and a first valve 410; the heater 210 is disposed in the first oil inlet pipe 110 and is used to heat the fluid transported by the first oil inlet pipe 110; the second oil inlet pipe 120 is connected to the first oil inlet pipe 110 and is used to replace the first oil inlet pipe 110 in transporting the fluid heated by the heater 210; the heat exchanger 220 is disposed in the second oil inlet pipe 120 and is distributed downstream of the heater 210 along the direction of fluid transport in the second oil inlet pipe 120; the circulation tank 300 is connected to the first oil inlet pipe 120 and the first valve 410. The loop 310 is connected to the first oil inlet pipe 110 and to the second oil inlet pipe 120 via the second circulation pipe 320; the first valve 410 is located in the second oil inlet pipe 120; along the direction of fluid transport in the second oil inlet pipe 120, the first valve 410 is located downstream of the connection between the second circulation pipe 320 and the second oil inlet pipe 120 and upstream of the heat exchanger 220; wherein, when the first valve 410 is closed, the fluid heated by the heater 210 in the first oil inlet pipe 110 can circulate between a portion of the second oil inlet pipe 120, the second circulation pipe 320, the circulation tank 300, the first circulation pipe 310, and a portion of the first oil inlet pipe 110.

[0031] When a component or equipment downstream of the second oil inlet pipeline 120, such as the heat exchanger 220, malfunctions, the first valve 410 can be closed, allowing fluid (e.g., rapeseed oil awaiting processing) to circulate between a portion of the second oil inlet pipeline 120, the second circulation pipeline 320, the circulation tank 300, the first circulation pipeline 310, and a portion of the first oil inlet pipeline 110. In this way, maintenance can be performed on the components downstream of the second oil inlet pipeline 120 without shutting down the heater 210, which helps reduce the frequency of starting and stopping the heater 210 and reduces the energy consumption increase caused by the frequent starting and stopping of the heater 210.

[0032] It should be noted that, in the above statement that "when the first valve 410 is closed, the fluid heated by the heater 210 in the first oil inlet pipe 110 can circulate between a portion of the second oil inlet pipe 120, the second circulation pipe 320, the circulation tank 300, the first circulation pipe 310, and a portion of the first oil inlet pipe 110", the "partial second oil inlet pipe 120" refers to the section of the second oil inlet pipe 120 from the connection point between the second oil inlet pipe 120 and the first oil inlet pipe 110 to the connection point between the second oil inlet pipe 120 and the second circulation pipe 320, and the "partial first oil inlet pipe 110" refers to the section of the first oil inlet pipe 110 from the connection point between the first circulation pipe 310 and the first oil inlet pipe 110 to the connection point between the first oil inlet pipe 110 and the second oil inlet pipe 120.

[0033] Optionally, the first oil inlet pipe 110 can also be connected to the heat exchanger 220, and the heat exchanger 220 is located upstream of the heater 210 along the direction of fluid transport in the first oil inlet pipe 110. When the first oil inlet pipe 110 supplies the crude oil or other fluids to be processed to the food oil production system 010, the fluid transported by the first oil inlet pipe 110 that has not yet been heated by the heater 210 can also exchange heat with the heated fluid transported by the second oil inlet pipe 120 through the heat exchanger 220. This arrangement can reduce the need to install other heat exchange pipes in the heat exchanger 220 for heat exchange with the fluid transported in the second oil inlet pipe 120, and it is not necessary to transport other heat exchange media in the heat exchange pipes, which helps to reduce the setup and operation costs of the food oil production system 010.

[0034] Optionally, the circulating tank device further includes a second valve 420, which is disposed on the first oil inlet pipeline 110; in the direction of fluid transport along the first oil inlet pipeline 110, the second valve 420 is located upstream of the connection between the first circulating pipeline 310 and the first oil inlet pipeline 110.

[0035] When a component or device downstream of the second oil inlet pipeline 120, such as heat exchanger 220, malfunctions, the first valve 410 and the second valve 420 can be closed to ensure that the fluid reliably circulates between a portion of the second oil inlet pipeline 120, the second circulation pipeline 320, the circulation tank 300, the first circulation pipeline 310, and a portion of the first oil inlet pipeline 110. In this way, the components downstream of the second oil inlet pipeline 120 can be maintained without shutting down the heater 210, which helps to reduce the frequency of starting and stopping the heater 210 and reduce the increase in energy consumption caused by the frequent starting and stopping of the heater 210.

[0036] Optionally, the circulating tank device further includes a third valve 430, which is disposed in the second circulating pipeline 320. When it is not necessary for the fluid to circulate between a portion of the second inlet pipeline 120, the second circulating pipeline 320, the circulating tank 300, the first circulating pipeline 310, and a portion of the first inlet pipeline 110, the third valve 430 can be closed and the first valve 410 and the second valve 420 can be opened, so that the fluid transported by the first inlet pipeline 110, after being heated by the heater 210, can be reliably transported downstream to the heat exchanger 220 by the second inlet pipeline 120.

[0037] Optionally, the circulation tank device further includes a fourth valve 440, which is disposed in the first circulation line 310. When it is not necessary for fluid to circulate between a portion of the second inlet line 120, the second circulation line 320, the circulation tank 300, the first circulation line 310, and a portion of the first inlet line 110, the fourth valve 440 can be further closed after the third valve 430 is closed and the first valve 410 and the second valve 420 are opened, to ensure that the flow path between the second circulation line 320, the circulation tank 300, and the first circulation line 310 is reliably blocked.

[0038] The first valve 410, the second valve 420, the third valve 430, and the fourth valve 440 include, but are not limited to, electrically controlled valves and manually operated valves.

[0039] Optionally, the circulating tank device further includes a third oil inlet line 130, which is connected to the second oil inlet line 120 and is used to replace the second oil inlet line 120 in transporting the fluid that has been heat-exchanged by the heat exchanger 220.

[0040] Taking the production of Sichuan pepper oil as an example, when producing Sichuan pepper oil, it is usually necessary to use crude oil (i.e., rapeseed oil) at a temperature of approximately 120°C to extract dried Sichuan pepper powder. Heater 210 can heat the crude oil to be processed, which is transported by the first oil inlet pipe 110, to approximately 180°C, and then transport the crude oil at approximately 180°C to the heat exchanger 220 through the second oil inlet pipe 120 for heat exchange, so that the temperature of the crude oil to be processed drops to 120°C for downstream extraction processes.

[0041] Optionally, the circulating tank device further includes a third circulating pipeline 330, which is connected between the third oil inlet pipeline 130 and the circulating tank 300, so that the fluid in the third oil inlet pipeline 130 can flow into the circulating tank 300. The third circulating pipeline 330 allows the fluid (e.g., crude oil to be processed) in the third oil inlet pipeline 130 to flow into the circulating tank 300, and then flow back to the first oil inlet pipeline 110 through the first circulating pipeline 310, and be reheated by the heater 210, and then transported to the heat exchanger 220 for heat exchange via the second oil inlet pipeline 120. This arrangement allows the fluid to be returned to the heater 210 for reheating if the temperature of the fluid after heat exchange in the heat exchanger 220 does not reach the target temperature, or it can be used to relieve pressure by diverting the flow in the third circulating pipeline 330 when the pressure in the third oil inlet pipeline 130 is too high.

[0042] Optionally, the circulating tank device also includes a pressure relief valve 331, which is installed in the third circulating pipeline 330. When the pressure in the third oil inlet pipeline 130 is greater than the set pressure, the pressure relief valve 331 clicks, allowing at least a portion of the fluid transported in the third oil inlet pipeline 130 to be transported from the third circulating pipeline 330 to the circulating tank 300. This not only achieves the purpose of pressure relief but also allows the fluid entering the circulating tank 300 to flow back into the first oil inlet pipeline 110, be heated by the heater 210, and then re-enter the second oil inlet pipeline 120 for heat exchange again through the heat exchanger 220.

[0043] Alternatively, please refer to Figure 1 and Figure 2The circulating tank device also includes a buffer tank 500, a fourth circulating pipeline 340, an oil outlet pipeline 510, a fifth valve 450, and a sixth valve 460. A third oil inlet pipeline 130 is connected to the buffer tank 500, which is used to temporarily store fluid that has undergone heat exchange in the heat exchanger 220. The buffer tank 500 is connected to the circulating tank 300 via the fourth circulating pipeline 340, and the buffer tank 500 is also connected to the downstream process via the oil outlet pipeline 510. The fifth valve 450 is located in the fourth circulating pipeline 340, and the sixth valve 460 is located in the oil outlet pipeline 510. When the fifth valve 450 is open and the sixth valve 460 is closed, the fluid in the buffer tank 500 is transported to the circulating tank 300 via the fourth circulating pipeline 340. When the fifth valve 450 is closed and the sixth valve 460 is open, the fluid in the buffer tank 500 is transported to the downstream process via the oil outlet pipeline 510.

[0044] For example, the food oil production system 010 also includes an extraction device 600, and a buffer tank 500 is connected to the extraction device 600 via an oil outlet pipe 510.

[0045] When preparing refined oil products, especially when processing refined oil products by extraction, the extraction efficiency is often low. That is, during the extraction process, the flow rate of the oil used for processing is controlled to be slow in order to repeatedly extract the effective substances in the raw materials. Therefore, by setting up a buffer tank 500 upstream of the extraction equipment 600 to temporarily store the well-heated crude oil to be processed output from the third oil inlet pipeline 130, it is beneficial to control the flow rate of the crude oil to be processed during extraction and ensure the reliability of extraction.

[0046] By connecting the buffer tank 500 and the circulation tank 300 through the fourth circulation pipeline 340, when the temperature of the crude oil to be processed temporarily stored in the buffer tank 500 is lower than the set temperature (e.g., 120°C), the crude oil to be processed in the buffer tank 500 can be sent back to the circulation tank 300 through the fourth circulation pipeline 340, and then transported to the first oil inlet pipeline 110 through the first circulation pipeline. After being heated again by the heater 210, it is then transported to the heat exchanger 220 through the second oil inlet pipeline 120 for heat exchange, and then sent back to the buffer tank 500 through the third oil inlet pipeline 130. This reduces the occurrence of using crude oil to be processed at a temperature that does not meet the set temperature for extraction. Of course, when the temperature of the crude oil to be processed in the buffer tank 500 meets the set temperature, it is not necessary to transport the crude oil to be processed in the buffer tank 500 back to the circulation tank 300. Instead, it can be directly transported to the downstream extraction equipment 600, etc., through the oil outlet pipeline 510.

[0047] Optionally, the fourth circulation line 340 is connected to the buffer tank 500 via the oil outlet line 510, and the connection between the fourth circulation line 340 and the oil outlet line 510 is located upstream of the sixth valve 460 along the direction of fluid delivery of the oil outlet line 510.

[0048] Optionally, the oil outlet pipeline 510 is also provided with a main valve for controlling the opening and closing of the oil outlet pipeline 510, and the main valve is located upstream of the connection between the fourth circulation pipeline 340 and the oil outlet pipeline 510 in the direction of fluid delivery along the oil outlet pipeline 510.

[0049] Of course, in other embodiments, the fourth circulation line 340 and the oil outlet line 510 are independently connected to the buffer tank 500.

[0050] Optionally, the circulating tank device also includes a temperature sensor (not shown), which is installed in the buffer tank 500 to detect the temperature of the fluid inside the buffer tank 500. The installation of the temperature sensor allows for more accurate and flexible detection of the fluid temperature inside the buffer tank 500.

[0051] Optionally, the edible oil production system 010 also includes a controller (not shown in the figure), where the fifth valve 450 and the sixth valve 460 are both electrically controlled valves, and the temperature sensor, the fifth valve 450, and the sixth valve 460 are all electrically connected to the controller. When the temperature of the fluid (i.e., the crude oil to be processed) in the buffer tank 500 meets the set temperature, the temperature sensor sends a first detection signal to the controller, which then controls the fifth valve 450 to close and the sixth valve 460 to open. When the temperature of the fluid (i.e., the crude oil to be processed) in the buffer tank 500 does not meet the set temperature, the temperature sensor sends a second detection signal to the controller, which then controls the fifth valve 450 to open and the sixth valve 460 to close.

[0052] It should be noted that "meeting the set temperature" can mean: equal to the set temperature, for example: equal to 120℃.

[0053] Of course, in other embodiments, the above-mentioned "meeting the set temperature" may mean: greater than or equal to the set temperature, for example: greater than or equal to 120°C.

[0054] In summary, the circulating tank device of this utility model can be used in the edible oil production system 010. When other components or equipment in the edible oil production system, except for the heater 210 of the circulating tank device, malfunction or require maintenance, maintenance can be carried out on other components or equipment without shutting down the heater 210 of the circulating tank device, thereby reducing the frequency of starting and stopping the heater 210 and helping to save energy.

[0055] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A circulating tank device, characterized in that, include: First oil inlet line (110); A heater (210) is provided in the first oil inlet pipe (110) for heating the fluid transported in the first oil inlet pipe (110); The second oil inlet pipe (120) is connected to the first oil inlet pipe (110) and is used to replace the first oil inlet pipe (110) in transporting the fluid heated by the heater (210); A heat exchanger (220) is provided in the second oil inlet pipe (120) and is distributed downstream of the heater (210) in the direction of fluid delivery along the second oil inlet pipe (120); A circulation tank (300) is connected to the first oil inlet pipe (110) via a first circulation pipe (310) and to the second oil inlet pipe (120) via a second circulation pipe (320); A first valve (410) is disposed in the second oil inlet pipeline (120); along the direction of fluid transport in the second oil inlet pipeline (120), the first valve (410) is located downstream of the connection between the second circulation pipeline (320) and the second oil inlet pipeline (120), and upstream of the heat exchanger (220); wherein, When the first valve (410) is closed, the fluid heated by the heater (210) in the first oil inlet line (110) can circulate between a portion of the second oil inlet line (120), the second circulation line (320), the circulation tank (300), the first circulation line (310), and a portion of the first oil inlet line (110).

2. The circulating tank device according to claim 1, characterized in that, The circulating tank device further includes a second valve (420), which is disposed on the first oil inlet pipeline (110); in the direction of fluid transport along the first oil inlet pipeline (110), the second valve (420) is located upstream of the connection between the first circulating pipeline (310) and the first oil inlet pipeline (110).

3. The circulating tank device according to claim 1, characterized in that, The circulating tank device also includes a third valve (430), which is disposed in the second circulating pipeline (320).

4. The circulating tank device according to claim 1, characterized in that, The circulating tank device further includes a fourth valve (440), which is disposed in the first circulating pipeline (310).

5. The circulating tank apparatus according to any one of claims 1-4, characterized in that, The circulating tank device also includes a third oil inlet pipe (130), which is connected to the second oil inlet pipe (120) and is used to replace the second oil inlet pipe (120) in transporting the fluid that has been heat-exchanged by the heat exchanger (220).

6. The circulating tank device according to claim 5, characterized in that, The circulating tank device further includes a third circulating pipeline (330), which is connected between the third oil inlet pipeline (130) and the circulating tank (300) so that the fluid in the third oil inlet pipeline (130) can flow into the circulating tank (300).

7. The circulating tank device according to claim 6, characterized in that, The circulating tank device also includes a pressure relief valve (331), which is located in the third circulating pipeline (330).

8. The circulating tank device according to claim 5, characterized in that, The circulating tank device also includes a buffer tank (500), a fourth circulating pipeline (340), an oil outlet pipeline (510), a fifth valve (450), and a sixth valve (460); the third oil inlet pipeline (130) is connected to the buffer tank (500), and the buffer tank (500) is used to temporarily store the fluid that has been heat exchanged by the heat exchanger (220); The buffer tank (500) is connected to the circulation tank (300) through the fourth circulation pipeline (340), and the buffer tank (500) is also connected to the downstream process through the oil outlet pipeline (510). The fifth valve (450) is located in the fourth circulation pipeline (340); the sixth valve (460) is located in the oil outlet pipeline (510). When the fifth valve (450) is open and the sixth valve (460) is closed, the fluid in the buffer tank (500) is transported to the circulation tank (300) through the fourth circulation pipeline (340); When the fifth valve (450) is closed and the sixth valve (460) is open, the fluid in the buffer tank (500) is transported to the downstream process through the oil outlet pipeline (510).

9. The circulating tank device according to claim 8, characterized in that, The circulating tank device also includes a temperature sensor, which is installed in the buffer tank (500) and is used to detect the temperature of the fluid in the buffer tank (500).

10. A food oil production system, characterized in that, Includes the circulating tank device according to any one of claims 1-9.

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