A constant temperature nitrogen filling and storage device for rapeseed oil

Abstract

The utility model discloses a constant temperature nitrogen -filled storage device of rapeseed oil, including the cylindrical jar body, the jar body lateral wall upper end is provided with the oil pipe that penetrates the jar body lateral wall, the jar body is double -walled shell, and the double -walled shell is vacuum between, be provided with agitator in the jar body, the jar body inner wall is provided with spiral coil, the spiral coil is filled with circulating water. The utility model discloses a storage device through setting up spiral coil in jar body inner wall, then through circulating water heat exchange temperature control device to the circulating water in spiral coil carries out heat exchange, makes circulating water cooling, to make the oil liquid in jar body keep constant low temperature, and the jar body is double -walled vacuum design, and is formed by two layer shell, and the middle vacuum extraction forms the insulating layer, and effectively insulates heat transfer, and the heat preservation performance is far more than single -layer oil tank, can effectively reach the purpose of constant temperature storage oil, through the oil liquid of agitator agitating, even oil temperature, prevent local overheating or low -temperature solidification, reduce the oil residue deposition, reduce the oxidation risk.

Description

Technical Field

[0001] This utility model belongs to the technical field of rapeseed oil preservation devices, and particularly relates to a constant temperature nitrogen-filled preservation device for rapeseed oil. Background Technology

[0002] During the storage of aromatic rapeseed oil in large tanks, the flavor and various indicators of the oil are affected by changes in external temperature. Storage in large tanks also leads to slow oxidation of the oil due to direct contact with air, resulting in deterioration of its flavor and indicators. Therefore, the equipment and conditions used for storing aromatic rapeseed oil are crucial to its quality and flavor. Currently, most edible oil tanks in the industry are constructed of single-layer carbon steel, making the stored oil temperature susceptible to changes in the external environment. Furthermore, contact between the oil and air inside the tank easily leads to oxidation and deterioration. Prolonged storage can severely impact the oil's quality and subsequent processing. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a constant temperature nitrogen-filled preservation device for rapeseed oil.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A constant-temperature nitrogen-filled storage device for rapeseed oil includes a cylindrical tank. An oil delivery pipe is provided at the upper end of the side wall of the tank, penetrating the side wall. The tank is a double-shell structure with a vacuum between the two shells. A stirring device for stirring the oil inside the tank is provided inside the tank. A spiral coil is provided on the inner wall of the tank, and circulating water is filled inside the spiral coil. Both ends of the spiral coil extend out of the tank and are connected to a circulating water heat exchange and temperature control device. A nitrogen-filling device for filling the tank with nitrogen is provided at the top of the tank.

[0006] Preferably, one-third of the tank is disposed below ground level and two-thirds is disposed above ground level.

[0007] Preferably, the stirring device includes a stirring shaft, which is vertically arranged at the center of the tank. Several stirring blades are connected to the stirring shaft, the top end of the stirring shaft extends out of the top of the tank, and a motor for driving the stirring shaft to rotate is connected to the top end of the stirring shaft.

[0008] Preferably, the circulating water heat exchange temperature control device includes a refrigeration heat exchanger, a temperature sensor, and a PLC controller. The temperature sensor is installed on the tank to monitor the temperature of the oil in the tank, and the PLC controller is electrically connected to the refrigeration heat exchanger and the temperature sensor.

[0009] Preferably, a vacuum pump is connected to the outer shell of the tank for evacuating the space between the two shells.

[0010] Preferably, the nitrogen filling device includes a nitrogen cylinder, a pressure boosting valve, and a pressure sensor. The outlet of the nitrogen cylinder is connected to the tank body through a pipeline. The pressure boosting valve is connected to the pipeline of the nitrogen cylinder to pressurize and deliver nitrogen into the tank body. The pressure sensor is installed on the tank body to monitor the gas pressure inside the tank body. The PLC controller is electrically connected to the pressure boosting valve and the pressure sensor.

[0011] Preferably, the tank is equipped with a breathing valve.

[0012] Preferably, the bottom of the tank is a conical bottom with a 45° inclination angle, and the conical bottom is connected to the oil outlet.

[0013] Preferably, the inner shell of the tank is provided with a plurality of semi-circular protrusions facing into the tank, and the semi-circular protrusions extend along the height direction of the tank.

[0014] The beneficial effects of this utility model are:

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] This invention's storage device utilizes a spiral coil installed on the inner wall of the tank. A circulating water heat exchanger and temperature control device then cools the circulating water within the spiral coil, maintaining a constant low temperature for the oil inside the tank. The tank features a double-layer vacuum design, consisting of two shells with a vacuum layer in between to form an insulation layer. This effectively isolates heat transfer, providing insulation performance far exceeding that of a single-layer tank. It reduces the impact of external temperature changes on the oil inside the tank, effectively achieving constant-temperature oil storage. A stirring device agitates the oil, ensuring uniform temperature and preventing localized overheating or low-temperature solidification, reducing oil residue sedimentation and minimizing oxidation risks. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the tank body of this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the tank body of this utility model.

[0020] In the diagram: 1. Tank body; 11. Oil pipeline; 2. Agitator; 21. Agitator shaft; 22. Agitator blades; 23. Motor; 3. Spiral coil; 4. Circulating water heat exchanger temperature control device; 5. Nitrogen charging device; 51. Pressure booster valve; 52. Pressure sensor; 6. Vacuum pump; 7. Breather valve; 8. Semi-circular protrusion. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-3 As shown, this utility model provides a technical solution: a constant temperature nitrogen-filled storage device for rapeseed oil, including a cylindrical tank 1, an oil delivery pipe 11 penetrating the side wall of the tank 1 at the upper end of the side wall of the tank 1, the tank 1 being a double-layer shell with a vacuum between the two layers, a stirring device 2 inside the tank 1 for stirring the oil inside the tank 1, a spiral coil 3 inside the inner wall of the tank 1, circulating water being filled inside the spiral coil 3, and both ends of the spiral coil 3 extending out of the tank 1 and connected to a circulating water heat exchange temperature control device 4, and a nitrogen filling device 5 at the top of the tank 1 for filling the tank 1 with nitrogen.

[0023] The storage device of this utility model uses a spiral coil 3 installed on the inner wall of the tank 1, and a circulating water heat exchange and temperature control device 4 to exchange heat with the circulating water in the spiral coil 3, thereby cooling the circulating water and keeping the oil in the tank 1 at a constant low temperature. The tank 1 is a double-layer vacuum design, consisting of two shells with a vacuum in the middle to form a heat insulation layer, which effectively isolates heat transfer and has a heat preservation performance far exceeding that of a single-layer oil tank. This reduces the impact of external temperature changes on the oil in the tank and can effectively achieve the purpose of storing oil at a constant temperature. The stirring device 2 agitates the oil to uniformly heat the oil, prevents local overheating or low-temperature solidification, reduces oil residue sedimentation, and reduces the risk of oxidation.

[0024] Furthermore, one-third of the tank body 1 is located below ground level, and two-thirds is located above ground level, further reducing the impact of seasonal temperature changes on the tank body temperature.

[0025] Specifically, the stirring device 2 includes a stirring shaft 21, which is vertically arranged at the center of the tank 1. Several stirring blades 22 are connected to the stirring shaft 21. The top end of the stirring shaft 21 extends out of the top of the tank 1, and a motor 23 for driving the stirring shaft 21 to rotate is connected to the top end of the stirring shaft 21. The stirring blades 22 on the stirring shaft 21 drive the oil in the tank to flow, thereby realizing the stirring of the oil.

[0026] Specifically, the circulating water heat exchange temperature control device 4 includes a refrigeration heat exchanger, a temperature sensor, and a PLC controller. The temperature sensor is installed on the tank 1 to monitor the temperature of the oil inside the tank 1. The PLC controller is electrically connected to the refrigeration heat exchanger and the temperature sensor, thereby cooling the circulating water through the refrigeration heat exchanger. When the circulating water flows into the spiral coil 3, it absorbs heat from the oil, thus continuously cooling the oil inside the tank. When the temperature sensor detects that the oil inside the tank has reached the preset temperature, it sends an electrical signal to the PLC controller. When the PLC controller receives the electrical signal from the temperature sensor, it controls the refrigeration heat exchanger to stop working. When the temperature sensor detects that the oil inside the tank is higher than the preset temperature, the PLC controller controls the refrigeration heat exchanger to start working again to cool the oil inside the tank. This process is repeated to keep the oil inside the tank at a constant low temperature (18±1℃), reducing the risk of oxidation.

[0027] Specifically, a vacuum pump 6 is connected to the outer shell of the tank 1 to achieve vacuuming between the two shells.

[0028] Specifically, the nitrogen filling device 5 includes a nitrogen cylinder, a pressure boosting valve 51, and a pressure sensor 52. The outlet of the nitrogen cylinder is connected to the tank 1 through a pipe. The pressure boosting valve 51 is connected to the pipe of the nitrogen cylinder to pressurize and deliver nitrogen into the tank 1. The pressure sensor 52 is installed on the tank 1 to monitor the gas pressure inside the tank 1. The PLC controller is electrically connected to the pressure boosting valve 51 and the pressure sensor 52. The pressure boosting valve 51 pressurizes and delivers nitrogen from the nitrogen cylinder to the tank 1 through the pipe. The pressure sensor 52 monitors the gas pressure inside the tank 1. When the gas pressure inside the tank reaches a preset pressure value, the pressure sensor 52 sends an electrical signal to the PLC controller. When the PLC controller receives the electrical signal sent by the pressure sensor 52, it controls the pressure boosting valve 51 to stop working, so that a positive pressure environment (0.1-0.5 bar) is formed inside the tank, preventing oxygen in the air from entering the tank and keeping the residual oxygen inside the tank <2%, reducing the risk of oil oxidation.

[0029] Furthermore, a breather valve 7 is provided on the tank body 1 to balance the pressure inside and outside the tank and prevent overpressure or vacuum.

[0030] Furthermore, the bottom of the tank 1 is a conical bottom with a 45° inclination angle. The conical bottom connects to the oil outlet, utilizing gravity to naturally guide the flow and reduce oil residue. The residue level can be as low as 0.5%–2% of the total capacity (the residue level of a flat-bottomed tank can reach 5%–10%). The 45° inclination design also prevents impurities from accumulating at the bottom. Combined with the location of the oil outlet, this facilitates regular drainage or cleaning. Simultaneously, the oil is concentrated at the outlet at the bottom of the cone, reducing the risk of dry suction in the oil suction pipe and improving pumping efficiency.

[0031] Furthermore, the inner shell of the tank body 1 is provided with several semi-circular protrusions 8 facing inwards, extending along the height direction of the tank body 1. Normally, when the oil in the tank is stirred, the rotation of the stirring blades causes the liquid to form a central vortex, resulting in axial rotation of the oil rather than thorough mixing and low edge mixing efficiency. The semi-circular protrusions 8 designed to guide the flow on the inner wall of the tank disrupt the rotational symmetry of the fluid, converting some kinetic energy into radial flow and turbulence, reducing vortex formation, promoting the vertical and horizontal circulation of the oil within the tank during stirring, avoiding stratification, improving mixing uniformity, and effectively preventing localized overheating or overcooling when the oil is heated or cooled in the tank, thus improving thermal efficiency, reducing heating or cooling time, and ensuring uniform heating or cooling.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A constant-temperature nitrogen-filled preservation device for rapeseed oil, characterized in that, The tank includes a cylindrical tank (1), with an oil pipe (11) extending through the side wall of the tank (1) at the upper end of the side wall. The tank (1) is a double-layer shell with a vacuum between the two layers. The tank (1) is equipped with a stirring device (2) for stirring the oil inside the tank (1). The inner wall of the tank (1) is equipped with a spiral coil (3), which is filled with circulating water. The two ends of the spiral coil (3) extend out of the tank (1) and are connected to a circulating water heat exchange temperature control device (4). The top of the tank (1) is equipped with a nitrogen filling device (5) for filling the tank (1) with nitrogen.

2. The constant-temperature nitrogen-filled preservation device for rapeseed oil according to claim 1, characterized in that, One-third of the tank (1) is located below ground level, and two-thirds is located above ground level.

3. The constant-temperature nitrogen-filled preservation device for rapeseed oil according to claim 1, characterized in that, The stirring device (2) includes a stirring shaft (21), which is vertically arranged in the center of the tank (1). Several stirring blades (22) are connected to the stirring shaft (21). The top end of the stirring shaft (21) extends out of the top of the tank (1), and a motor (23) for driving the stirring shaft (21) to rotate is connected to the top end of the stirring shaft (21).

4. The constant temperature nitrogen-filled preservation device for rapeseed oil according to claim 1, characterized in that, The circulating water heat exchange temperature control device (4) includes a refrigeration heat exchanger, a temperature sensor and a PLC controller. The temperature sensor is installed on the tank (1) to monitor the temperature of the oil in the tank (1). The PLC controller is electrically connected to the refrigeration heat exchanger and the temperature sensor.

5. The constant-temperature nitrogen-filled preservation device for rapeseed oil according to claim 1, characterized in that, A vacuum pump (6) is connected to the outer shell of the tank (1) for drawing a vacuum between the two shells.

6. The constant-temperature nitrogen-filled preservation device for rapeseed oil according to claim 4, characterized in that, The nitrogen filling device (5) includes a nitrogen cylinder, a pressure boosting valve (51) and a pressure sensor (52). The outlet of the nitrogen cylinder is connected to the tank (1) through a pipe. The pressure boosting valve (51) is connected to the pipe of the nitrogen cylinder to pressurize and deliver nitrogen to the tank (1). The pressure sensor (52) is installed on the tank (1) to monitor the gas pressure inside the tank (1). The PLC controller is electrically connected to the pressure boosting valve (51) and the pressure sensor (52).

7. The constant-temperature nitrogen-filled preservation device for rapeseed oil according to claim 1, characterized in that, The tank (1) is equipped with a breathing valve (7).

8. The constant temperature nitrogen-filled preservation device for rapeseed oil according to claim 1, characterized in that, The bottom of the tank (1) is a conical bottom with an inclination angle of 45°, and the conical bottom is connected to the oil outlet.

9. The constant-temperature nitrogen-filled preservation device for rapeseed oil according to claim 1, characterized in that, The inner shell of the tank (1) is provided with a number of semi-circular protrusions (8) facing the inside of the tank, and the semi-circular protrusions (8) extend along the height direction of the tank (1).

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