Vegetable oil alkali refining tank

Abstract

The utility model relates to the technical field of vegetable oil production, and discloses a vegetable oil alkali refining tank which is characterized by comprising a tank top plate, a temperature control tank body and a discharging valve, the discharging valve is connected to a bottom opening of the temperature control tank body in a matched mode, and the tank top plate is connected to a top opening of the temperature control tank body in a matched mode; the temperature control tank body comprises an inner-layer tank and an outer-layer tank which are fixedly connected in a sealed mode, and a temperature control cavity is formed between the inner-layer tank and the outer-layer tank; a plurality of annular partition plates are arranged in the temperature control cavity, water passing openings are formed in the annular partition plates in a penetrating mode, and the water passing openings in every two adjacent annular partition plates are located at the farthest positions; a tank body water inlet is formed in the bottom of the outer-layer tank, and a tank body water outlet is formed in the top of the outer-layer tank; the water inlet of the tank body is externally connected with a water body temperature control mechanism, and the water body temperature control mechanism is used for heating the water body with adjustable temperature and introducing the heated water body into the water inlet of the tank body.

Description

Technical Field

[0001] This utility model relates to the field of vegetable oil production technology, and more specifically, it relates to a vegetable oil alkali refining tank. Background Technology

[0002] In the vegetable oil production process, the alkali refining process is a core step that determines the quality of the finished oil, and precise temperature control is extremely crucial. Temperature fluctuations not only directly affect the reaction rate and extent between the alkali solution and impurities such as free fatty acids in the crude oil, but also relate to many important indicators of the finished oil, such as color, acid value, and stability. However, traditional vegetable oil alkali refining tanks currently on the market have many problems in temperature control that urgently need to be solved, which seriously restricts the optimization of the alkali refining process and the improvement of product quality.

[0003] In terms of heating and cooling methods, most traditional alkali refining tanks employ a single jacketed heating or cooling mode. For example, during the heating process, the tank is heated solely by introducing steam. This method cannot meet the alkali refining requirements of some vegetable oils that are sensitive to temperature changes. When rapid heating or cooling is required, a single heating or cooling method is slow to respond and cannot quickly adjust the temperature of the material inside the tank to the appropriate range. This prevents the alkali refining reaction from proceeding under optimal temperature conditions, affecting reaction efficiency and product quality. Moreover, steam heating easily leads to uneven temperature distribution inside the tank, with higher temperatures near the jacket and relatively lower temperatures in the central area, resulting in inconsistent material reactions and reducing the alkali refining effect.

[0004] Therefore, it is necessary to make targeted improvements to the temperature control structure of the alkali refining tank in order to meet the temperature control requirements of modern vegetable oil production. Utility Model Content

[0005] The purpose of this invention is to provide a vegetable oil alkali refining tank that can quickly adjust the internal temperature of the tank, has a higher temperature utilization rate for hot water media, and is more energy-efficient.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a vegetable oil alkali refining tank, including a tank top plate, a temperature-controlled tank body, and a discharge valve, wherein the discharge valve is connected to the bottom opening of the temperature-controlled tank body, and the tank top plate is connected to the top opening of the temperature-controlled tank body;

[0007] The temperature-controlled tank includes an inner tank and an outer tank that are sealed and fixedly connected, and a temperature-controlled cavity is formed between the inner tank and the outer tank;

[0008] The temperature control cavity is provided with several annular partition plates, and water inlets are provided through the annular partition plates. The water inlets on two adjacent annular partition plates are located at the farthest positions.

[0009] The bottom of the outer tank is provided with a tank inlet, and the top of the outer tank is provided with a tank outlet.

[0010] The tank inlet is connected to a water temperature control mechanism, which is used to heat the water at an adjustable temperature and then introduce the heated water into the tank inlet.

[0011] As a technical solution of this utility model, temperature sensors are respectively installed inside the inner tank and inside the temperature control cavity, and the temperature sensors are connected to the temperature display.

[0012] As a technical solution of this utility model, two temperature sensors are provided in the temperature control cavity, and the two temperature sensors are located at the water inlet of the tank and the water outlet of the tank, respectively.

[0013] As a technical solution of this utility model, the temperature sensor inside the inner tank is provided with an inclined extension rod, the top end of the extension rod is connected to the temperature sensor, and the bottom end of the extension rod is fixedly connected to the inner side of the inner tank.

[0014] As a technical solution of this utility model, the water temperature control mechanism includes a heating water tank, a temperature-adjusting water tank, a first water pump, and a second water pump; the heating water tank is equipped with a heater, and the top of the heating water tank is provided with a heating inlet and a heating outlet. The heating inlet is used to introduce water. The inlet pipe of the first water pump passes through the inlet and extends into the bottom of the heating water tank. The top of the temperature-adjusting water tank is provided with a hot water inlet, a cold water inlet, and a temperature-adjusting water outlet; the outlet pipe of the first water pump is connected to the hot water inlet, the cold water inlet is used to introduce cold water, the inlet pipe of the second water pump passes through the temperature-adjusting water outlet and extends into the bottom of the temperature-adjusting water tank, and the outlet pipe of the second water pump is connected to the tank inlet;

[0015] Both the heating water tank and the temperature regulating water tank are equipped with temperature sensors, and the temperature sensors are equipped with temperature displays.

[0016] Both the first and second water pumps are adjustable water pumps, the heater is an adjustable heater, and the heating inlet and cold water inlet are respectively equipped with flow valves.

[0017] As a technical solution of this utility model, a level gauge is provided in the heating water tank and the temperature regulating water tank, and the level gauge is equipped with a level display.

[0018] As a technical solution of this utility model, the inlet pipe and outlet pipe of the first water pump and the second water pump are respectively provided with heat insulation layers; the heating water tank and the temperature regulating water tank are respectively provided with heat insulation layers.

[0019] As one technical solution of this utility model, an insulation layer is provided on the outer side of the outer tank.

[0020] In summary, this invention has the following beneficial effects: the annular partition plate within the temperature-controlled cavity divides the space into layers, and the water inlets of adjacent partition plates are located at both ends of the horizontal diameter of the tank, forming a diagonal distribution. This forces the water to flow in an "S-shaped" or spiral path within the cavity, significantly extending the contact time between the hot water and the inner tank. It avoids the "short-circuit flow" phenomenon of traditional jacketed structures, thus improving the circumferential temperature uniformity of the inner tank.

[0021] The water temperature control mechanism can precisely adjust the water supply temperature and evenly heat the inner tank through continuous circulation of hot water, making it easier to control temperature fluctuations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the water temperature control mechanism of this utility model;

[0024] Figure 3 This is a schematic diagram of two adjacent annular partition plates of this utility model.

[0025] In the diagram: 1. Tank top plate; 2. Discharge valve; 3. Inner tank; 4. Outer tank; 5. Temperature control cavity; 6. Annular partition plate; 7. Water inlet; 8. Tank inlet; 9. Tank outlet; 10. Temperature sensor; 11. Extension rod; 12. Heating water tank; 13. Temperature-adjusting water tank; 14. First water pump; 15. Second water pump; 16. Heater; 17. Heating inlet; 18. Heating outlet; 19. Hot water inlet; 20. Cold water inlet; 21. Temperature-adjusting water outlet; 22. Hot water recovery tank; 23. Recovery water pump; 24. Recovery inlet; 25. Recovery outlet; 26. Recovery water inlet. Detailed Implementation

[0026] 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 a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] This utility model provides a vegetable oil alkali refining tank, including a tank top plate 1, a temperature-controlled tank body, and a discharge valve 2. The discharge valve 2 is connected to the bottom opening of the temperature-controlled tank body and is used to close the discharge port of the tank body during the alkali refining process. After the alkali refining is completed, the discharge port is opened to discharge the oil and soap residue.

[0028] The tank top plate 1 is fitted to the top opening of the temperature-controlled tank body to seal the top opening. The tank top plate 1 also functions as a feeding device. It has an oil inlet and an auxiliary material inlet for adding the vegetable oil and alkali solution to be processed, respectively. The tank top plate 1 also includes spray nozzles, etc., for cleaning the inside of the tank after alkali refining. Each opening is equipped with valves and corresponding equipment accessories. For example, the oil inlet is connected to the crude oil tank via an oil pipeline, and the valve controls the amount of oil entering the alkali refining tank; similarly, the bottom of the spray nozzle is equipped with a spray head, and the top of the spray nozzle is fitted with a spray water pipe to supply spray water, with the spraying operation controlled by a valve.

[0029] The tank top plate 1 is also used to connect a stirring mechanism. The stirring part of the stirring mechanism is located inside the temperature-controlled tank, and the driving part of the stirring mechanism is located on the top surface of the tank top plate 1. The stirring part of the stirring mechanism includes a rotating central shaft and several stirring paddles arranged outside the rotating central shaft. The driving part of the stirring mechanism is a rotary motor. The stator of the rotary motor is fixedly connected to the top surface of the tank top plate 1. A coupling is provided at the center of the tank top plate 1. The rotor of the rotary motor is connected to the top of the rotating central shaft through the coupling. When the rotary motor is working, its rotor rotates and drives the rotating central shaft to rotate, thereby causing the stirring paddles to rotate and agitate the vegetable oil inside the tank, so that the vegetable oil and alkali solution can be fully mixed, and the reaction rate of the alkali solution with impurities such as free fatty acids in the crude oil is faster.

[0030] Of course, it's not just the structures mentioned above. The tank top plate 1 will also be equipped with some functional structures according to actual needs. Similarly, the temperature control tank body, discharge valve 2, and tank support structure, etc., will all be equipped with some functional structures and corresponding connections according to actual needs during actual implementation, in order to realize the alkali refining implementation of the alkali refining tank in actual application. However, this is not the main improvement direction of this utility model, so it will not be elaborated here. The improvement direction of this utility model is the temperature control structure. The following are the main improvements to the temperature control structure of the alkali refining tank.

[0031] To achieve better temperature control, the main improvement of this utility model is the structure of the temperature control tank itself, and secondly, the water temperature control mechanism, with both working together.

[0032] Regarding the temperature-controlled tank:

[0033] The temperature-controlled container includes an inner tank 3 and an outer tank 4 that are sealed and fixedly connected. A temperature-controlled cavity 5 is formed between the inner tank 3 and the outer tank 4. The upper part of the inner tank 3 and the outer tank 4 is cylindrical, and the lower part is funnel-shaped. There is a uniform gap between the inner tank 3 and the outer tank 4, forming the cavity. Annular connecting plates are connected to the top and bottom edges of the inner tank 3 and the outer tank 4, respectively. The inner edge of the annular connecting plate is sealed and fixedly connected to the inner tank 3, and the outer edge of the annular connecting plate is sealed and fixedly connected to the outer tank 4, so that the top and bottom of the temperature-controlled cavity 5 can be sealed.

[0034] The temperature-controlled cavity 5 is equipped with several annular partition plates 6. The annular partition plates 6 are horizontal and have water inlets 7 running through them. The water inlets 7 on two adjacent annular partition plates 6 are located at the farthest points. The annular partition plates 6 can divide the temperature-controlled cavity 5 into layers in the vertical direction. There is only one water inlet 7 between adjacent partition spaces. The water inlets 7 between two adjacent annular partition plates 6 are located at the farthest points, that is, at the two ends of a horizontal diameter of the tank. Therefore, when the water flows in the temperature-controlled cavity 5, it will flow through at least a semi-circular path, which can extend the flow path of the water in the temperature-controlled cavity 5, improve the circumferential temperature uniformity of the tank, and thus make fuller use of the water temperature.

[0035] One practical manufacturing method for the temperature-controlled tank involves first connecting the inner tank 3 to the outer side using welding or other fixed and sealed methods. The annular partition plate 6 and the annular connecting plates at the top and bottom are then connected to the inner tank 3. An elastic sealing gasket is installed along the outer edge of the annular partition plate 6. This gasket is made of high-temperature resistant silicone rubber (operating temperature -60~200℃, pressure resistance ≤0.3MPa), and is embedded into the outer edge of the annular partition plate 6 via a dovetail groove structure to ensure no leakage when the water pressure in the temperature-controlled cavity 5 is ≤0.2MPa. Then, the outer tank 4 is fitted over the inner tank 3, and the connection between the outer tank 4 and the annular connecting plate is sealed and fixed. This completes the formation of the entire temperature-controlled cavity 5. The outer side of the annular partition plate 6 and the inner side of the outer tank 4 are also connected by a sealing gasket.

[0036] The bottom of the outer tank 4 is provided with a tank inlet 8, and the top of the outer tank 4 is provided with a tank drain outlet 9. The tank inlet 8 is connected to a water temperature control mechanism, which is used to heat the water at an adjustable temperature and then introduce the heated water into the tank inlet 8.

[0037] In practical applications, hot water is supplied through a water temperature control mechanism and enters the bottom of the temperature-controlled cavity 5 through the tank inlet 8. As water continues to flow in, the water level in the temperature-controlled cavity 5 gradually rises. When the water continues to flow in, it reaches the bottom annular partition plate 6 and overflows from the outlet 7. The water level continues to rise until it reaches the top of the temperature-controlled cavity 5 and is discharged from the tank drain outlet 9. At this point, the flowing hot water fills the entire temperature-controlled cavity 5, continuously heating the inner tank 3, thereby providing the appropriate temperature during the alkali refining process of vegetable oil.

[0038] Therefore, the actual internal temperature of the tank can be controlled by the hot water temperature provided by the water temperature control mechanism. For example, if the hot water provided by the water temperature control mechanism is a constant temperature of 40 degrees Celsius, and without considering the heat loss from the water during the continuous supply of water to the tank at the initial temperature, the actual temperature provided to the inner tank 3 might only be 36-38 degrees Celsius. This temperature range exists because the reaction of vegetable oil during actual alkali refining also causes temperature fluctuations, and the heat loss from the water is not constant. Therefore, continuous temperature monitoring is necessary for better temperature control.

[0039] To facilitate actual temperature control, temperature sensors 10 are installed inside the inner tank 3 and the temperature control cavity 5, respectively. The temperature sensors 10 are connected to a temperature display. Two temperature sensors 10 are installed in the temperature control cavity 5, located at the tank inlet 8 and the tank outlet 9, respectively. The temperature display can continuously monitor the hot water temperature supplied to the temperature control tank by the water temperature control mechanism and the temperature of the water flowing out of the temperature control cavity 5.

[0040] The temperature sensor 10 inside the inner tank 3 is equipped with an inclined extension rod 11. The top end of the extension rod 11 is connected to the temperature sensor 10, and the bottom end of the extension rod 11 is fixedly connected to the inner side of the inner tank 3. Through the extension rod 11, the temperature sensor 10 inside the inner tank 3 can be kept at a certain distance from the inner tank 3, allowing the temperature sensor 10 to directly penetrate into the reacting oil, thereby directly sensing the temperature of the oil and displaying it through a temperature display. This reduces interference from the direct contact heating temperature of the inner tank 3 with water, and enables more accurate measurement of the temperature of the reacting materials.

[0041] By monitoring the temperature inside the inner tank 3, and monitoring the temperature of the water entering and exiting the temperature control cavity 5, the actual temperature can be obtained in a timely manner, which facilitates the subsequent control, regulation and management of the water temperature in the water temperature control mechanism.

[0042] When implementing the extension rod 11, it is necessary to consider whether it interferes with the position of the stirring mechanism inside the tank. If there is interference, the extension rod 11 should be removed, and the temperature sensor 10 should be directly installed on the inner wall of the inner tank 3. A heat insulation layer should be set between the temperature sensor 10 and the inner tank 3 to reduce temperature interference between the two.

[0043] When implementing the extension rod 11, it is also necessary to consider whether the tank is easy to clean. Some vegetable oils have a low viscosity, so the extension rod 11 itself will not have much oil residue. When spraying or hot air blowing, it will not affect the cleaning effect. However, some vegetable oils have a high viscosity, so the extension rod 11 is prone to oil residue or soap residue. In such cases, the extension rod 11 needs to be removed and the temperature sensor 10 can be installed directly on the inner wall of the inner tank 3.

[0044] Therefore, the actual setting of the extension rod 11 needs to take into account the actual application situation. If it affects the operation of other equipment, it needs to be selectively removed.

[0045] Regarding water temperature control mechanisms:

[0046] The water temperature control mechanism includes a heating water tank 12, a temperature-regulating water tank 13, a first water pump 14, and a second water pump 15. The heating water tank 12 is equipped with a heater 16, typically an electric heating element. The heating element's body extends into the heating water tank 12, and its base is mounted on the tank cover. The top of the heating water tank 12 has a heating inlet 17 and a heating outlet 18. The heating inlet 17 is used to introduce water. The inlet pipe of the first water pump 14 passes through the inlet and extends into the bottom of the heating water tank 12. The top of the temperature-regulating water tank 13 has a hot water inlet 19, a cold water inlet 20, and a temperature-regulating water outlet 21. The outlet pipe of the first water pump 14 is connected to the hot water inlet 19, and the cold water inlet 20 is used to introduce cold water. The inlet pipe of the second water pump 15 passes through the temperature-regulating water outlet 21 and extends into the bottom of the temperature-regulating water tank 13. The outlet pipe of the second water pump 15 is connected to the tank inlet 8.

[0047] Temperature sensors 10 are installed in both the heating water tank 12 and the temperature regulating water tank 13, and each temperature sensor 10 is equipped with a temperature display.

[0048] The first water pump 14 and the second water pump 15 are both water pumps with adjustable water flow rate. The heater 16 is a heater with adjustable heating power. The heating inlet 17 and the cold water inlet 20 are respectively equipped with flow valves.

[0049] In the actual supply of hot water to the temperature-controlled tank, the heater 16 is turned on, and the water source, namely tap water or filtered tap water, is introduced into the heating water tank 12 through the water pipe from the heating inlet 17. The heater 16 heats the water, and the water temperature exceeds the target temperature of the water to be introduced into the temperature-controlled cavity 5. Then, the first water pump 14 pumps the hot water in the heating water tank 12 into the temperature-adjusting water tank 13 through the hot water inlet 19. Since the water temperature is high at this time, exceeding the target temperature, low-temperature water such as tap water is added through the cold water inlet 20. At this time, the water temperature in the temperature-adjusting water tank 13 can be reduced.

[0050] Specific temperature control is achieved through the sensing of temperature sensor 10. The water temperatures in the heating water tank 12 and the temperature regulating water tank 13 are displayed on the temperature display. At this time, the water temperature in the heating water tank 12, the water temperature in the temperature regulating water tank 13, the water temperature entering the temperature control cavity 5, the temperature exiting the temperature control cavity 5, and the internal temperature of the inner tank 3 are all displayed on the temperature display. At this time, the staff can adjust the water temperature and water flow rate according to these temperature data.

[0051] Adjustable parameters include: the flow rate of cold water entering the heating water tank 12, the power of the heater 16, the flow rate of the first water pump 14, the flow rate of cold water entering the temperature-regulating water tank 13, and the flow rate of the second water pump 15.

[0052] In practical applications, the heating water tank 12 and the temperature-regulating water tank 13 are also designed with a water stirring mechanism to ensure that the cold water is fully mixed with the existing water after it enters, making the temperature sensed by the temperature sensor 10 more accurate. The heating water tank 12 and the temperature-regulating water tank 13 have a large capacity, which is used to quickly replace the water in the temperature control cavity 5 when rapid temperature adjustment is required.

[0053] Specifically, level gauges are installed in the heating water tank 12 and the temperature regulating water tank 13. The level gauges are equipped with level displays to detect the water level in the heating water tank 12 and the temperature regulating water tank 13, which facilitates actual water control.

[0054] Specific temperature control is achieved through real-time monitoring by temperature sensor 10. The temperatures of the heating water tank 12, the temperature regulating water tank 13, the inlet and outlet of the temperature control cavity 5, and the inner tank 3 are all collected by sensors and displayed on the temperature display. Based on these temperature data, operators can adjust parameters such as the cold water flow rate of the heating water tank 12, the power of the heater 16, the flow rate of the first water pump 14, the cold water flow rate of the temperature regulating water tank 13, and the flow rate of the second water pump 15 to precisely control the temperature of the inner tank 3.

[0055] In practical applications, in addition to manual adjustment, a process control system can be introduced. Based on the temperature data of each monitoring point and the water tank level, the system can automatically adjust various controllable parameters to achieve automated and intelligent temperature control, reduce manual intervention, and improve temperature control accuracy and stability. For example, when the temperature of the inner tank 3 is lower than the set value, the system can automatically increase the power of the heater 16, reduce the amount of cold water injected into the temperature regulating water tank 13, and adjust the water pump flow rate to accelerate hot water circulation and quickly raise the temperature; conversely, it can automatically reduce the heating power and increase the cold water flow rate to achieve dynamic temperature balance.

[0056] As an optional embodiment, the water temperature control mechanism is further provided with a hot water recovery tank 22 and a recovery water pump 23; the top of the hot water recovery tank 22 is provided with a recovery water inlet 24 and a recovery water outlet 25, and a recovery water pipe is connected between the recovery water inlet 24 and the tank drain outlet 9; the top of the heating water tank 12 is provided with a recovery water inlet 26; the inlet pipe of the recovery water pump 23 extends into the bottom of the hot water recovery tank 22, and the outlet pipe of the recovery water pump 23 extends into the recovery water inlet 26; a temperature sensor 10 is provided inside the hot water recovery tank 22, and the temperature sensor 10 is connected to a temperature display screen;

[0057] The hot water recovery tank 22 and the recovery water pump 23 are used to recover the hot water discharged from the tank drain 9 and use it to supply water to the heating water tank 12, thereby realizing waste heat recovery and reducing energy consumption. The temperature sensor 10 can also display the temperature of the recovered hot water in real time. A level gauge and a corresponding display screen can also be installed in the hot water recovery tank 22 to display the amount of recovered hot water in real time.

[0058] As one embodiment, the inlet and outlet pipes of the first water pump 14, the second water pump 15, and the recovery water pump 23 are each provided with an insulation layer; the heating water tank 12, the temperature regulating water tank 13, and the hot water recovery tank 22 are each provided with an insulation layer; and the outer tank 4 is provided with an insulation layer. By providing insulation layers, heat loss from the water can be reduced, thus reducing energy consumption.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vegetable oil alkali refining tank, characterized in that: It includes a tank top plate (1), a temperature-controlled tank body, and a discharge valve (2). The discharge valve (2) is connected to the bottom opening of the temperature-controlled tank body, and the tank top plate (1) is connected to the top opening of the temperature-controlled tank body. The temperature-controlled tank includes an inner tank (3) and an outer tank (4) that are sealed and fixedly connected, and a temperature-controlled cavity (5) is formed between the inner tank (3) and the outer tank (4); The temperature control cavity (5) is provided with several annular partition plates (6), and the annular partition plates (6) are provided with water inlets (7) through them. The water inlets (7) on two adjacent annular partition plates (6) are located at the farthest positions. The bottom of the outer tank (4) is provided with a tank inlet (8), and the top of the outer tank (4) is provided with a tank drain outlet (9). The tank inlet (8) is connected to a water temperature control mechanism, which is used to heat the water at an adjustable temperature and then introduce the heated water into the tank inlet (8).

2. The vegetable oil alkali refining tank according to claim 1, characterized in that: Temperature sensors (10) are respectively installed inside the inner tank (3) and the temperature control cavity (5), and the temperature sensors (10) are connected to the temperature display.

3. The vegetable oil alkali refining tank according to claim 2, characterized in that: Two temperature sensors (10) are installed inside the temperature control cavity (5). The two temperature sensors (10) are located at the water inlet (8) of the tank and the water outlet (9) of the tank, respectively.

4. A vegetable oil alkali refining tank according to claim 2, characterized in that: The temperature sensor (10) inside the inner tank (3) is provided with an inclined extension rod (11). The top end of the extension rod (11) is connected to the temperature sensor (10), and the bottom end of the extension rod (11) is fixedly connected to the inner side of the inner tank (3).

5. A vegetable oil alkali refining tank according to claim 1, characterized in that: The water temperature control mechanism includes a heating water tank (12), a temperature regulating water tank (13), a first water pump (14), and a second water pump (15); a heater (16) is installed inside the heating water tank (12), and a heating inlet (17) and a heating outlet (18) are provided on the top of the heating water tank (12). The heating inlet (17) is used to introduce water, and the inlet pipe of the first water pump (14) extends through the inlet into the bottom of the heating water tank (12). The temperature-regulating water tank (13) is provided with a hot water inlet (19), a cold water inlet (20) and a temperature-regulating water outlet (21) at the top; the outlet pipe of the first water pump (14) is connected to the hot water inlet (19), the cold water inlet (20) is used to introduce cold water, the inlet pipe of the second water pump (15) passes through the temperature-regulating water outlet (21) and extends into the bottom of the temperature-regulating water tank (13), and the outlet pipe of the second water pump (15) is connected to the tank inlet (8); Temperature sensors (10) are installed in both the heating water tank (12) and the temperature regulating water tank (13), and the temperature sensors (10) are equipped with temperature displays; The first water pump (14) and the second water pump (15) are both water pumps with adjustable water flow rate. The heater (16) is a heater with adjustable heating power. The heating inlet (17) and the cold water inlet (20) are respectively equipped with flow valves.

6. A vegetable oil alkali refining tank according to claim 5, characterized in that: The heating water tank (12) and the temperature regulating water tank (13) are equipped with level gauges, and the level gauges are equipped with level displays.

7. A vegetable oil alkali refining tank according to claim 6, characterized in that: The inlet and outlet pipes of the first water pump (14) and the second water pump (15) are respectively provided with heat insulation layers; the heating water tank (12) and the temperature regulating water tank (13) are respectively provided with heat insulation layers.

8. A vegetable oil alkali refining tank according to claim 7, characterized in that: The outer tank (4) is provided with an insulation layer on its outer side.

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