Heavy oil dehydration and separation system

Abstract

The utility model discloses a thick oil dehydration separation system, relates to thick oil treatment field, its technical scheme key point is including dehydration tank, dosing device, hot air device and stirring device, the wall body of dehydration tank is provided with airflow channel, through the hot air device delivers hot air into airflow channel, dosing device is used for injecting demulsifier into dehydration tank, stirring device is used for stirring the stirring device. The stirring device is used for stirring liquid in the dehydration tank. The system can realize heating and stirring of the thickened oil and the demulsifier, improve the fluidity of the thickened oil, promote evaporation and volatilization of water molecules, accelerate the separation speed and improve the dehydration efficiency. According to the system, hot air is used for heating, impurities in airflow are few, frequent cleaning and maintenance of an airflow channel are not needed, and the system is suitable for long-time continuous thickened oil dehydration operation.

Description

Technical Field

[0001] The utility model relates to a thick oil processing system, more specifically, it relates to a thick oil dehydration separation system. Background Art

[0002] Heavy oil is unprocessed petroleum, also known as crude oil. It is a dark brown viscous oily liquid with green fluorescence and a special smell. It is a mixture of various liquid hydrocarbons such as alkanes, cycloalkanes, aromatic hydrocarbons and olefins. However, heavy oil contains a large amount of water molecules. When heavy oil is commercialized, it needs to be dehydrated and separated.

[0003] One of the commonly used methods for dehydrating heavy oil is to add demulsifiers to the heavy oil and stir and mix them evenly, using the demulsifiers to accelerate the separation of water molecules from the heavy oil. However, the stirring efficiency is often limited by the high viscosity and low fluidity of heavy oil at room temperature, which limits the dehydration efficiency of the heavy oil.

[0004] In view of this problem, Chinese patent CN204981769U provides a simple crude oil dehydration device for the trial production stage, which includes several storage tanks, demulsifier dosing devices, heating boilers and sewage pools, wherein several storage tanks are connected in parallel, and several storage tanks are divided into circulation tanks, sedimentation tanks, good oil tanks and sewage tanks according to their functions, and the circulation tanks, sedimentation tanks and good oil tanks are connected through pipelines, and the circulation tanks, sedimentation tanks and good oil tanks are respectively connected to the sewage pool through pipelines, and the demulsifier dosing device is connected to the circulation tank by pipelines, and several storage tanks are provided with coils, and the heating boiler is connected to the coils by pipelines, and the heating boiler heats several storage tanks through the coils, and the sewage tank is connected to the sewage pool. A stirrer is provided on the circulation tank.

[0005] The above device uses water heat radiation heating. If there are impurities in the water, impurities will easily accumulate at the bends of the coil, affecting the heating efficiency. The coil needs to be cleaned and maintained regularly to ensure smooth water flow in the coil. However, the cleaning and maintenance of the coil is often cumbersome and time-consuming, and the heavy oil dehydration operation cannot be carried out during the cleaning and maintenance period. Therefore, the above device is only suitable for working conditions that do not require long-term continuous heavy oil dehydration.

[0006] Based on the above reasons, the heating components of the above device need to be further optimized in order to cope with long-term continuous heavy oil dehydration operations. Utility Model Content

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heavy oil dehydration and separation system, comprising a dehydration tank, a dosing device, a hot air device, a stirring device and a first valve. An air flow channel is arranged in the wall of the dehydration tank, and the air flow channel is provided with an air inlet and an air outlet, and the hot air device is used to transport hot air to the air inlet. A feed inlet is arranged at the top of the dehydration tank, and a discharge port is arranged at the bottom of the dehydration tank, and the first valve is installed at the discharge port. The dosing device is used to inject a demulsifier into the dehydration tank. The stirring device is used to stir the liquid in the dehydration tank.

[0008] The utility model is further configured as follows: the dehydration tank comprises a tank body and a heat preservation shell, the discharge port and the feed port are both arranged on the tank body, the dosing device is connected to the tank body, and the stirring device is used to stir the liquid in the tank body. The heat preservation shell is detachably connected to the outer wall of the tank body, and the air flow channel is arranged in the heat preservation shell.

[0009] The utility model is further configured as follows: the hot air device comprises a fan, a first motor and a heater, the first motor is used to drive the fan to rotate, and the airflow delivered by the fan enters the air inlet after being heated by the heater.

[0010] The utility model is further configured as follows: the hot air device further comprises a transmission belt and a transmission wheel. Two fans are provided, and the two fans are distributed up and down. Each fan is fixedly connected to a transmission wheel, and the first motor is used to drive one of the transmission wheels to rotate. The transmission belt is tensioned on the two transmission wheels so that the two transmission wheels rotate synchronously.

[0011] The utility model is further configured as follows: the hot air device also includes a dust cover, the dust cover is connected to the air inlet, the fan, the heater, the transmission belt and the transmission wheel are all located in the dust cover, a plurality of air inlet grilles or a plurality of air inlet meshes are arranged on the dust cover, and the air inlet grilles or the air inlet meshes are all located on the side of the fan away from the heater.

[0012] The utility model is further configured as follows: a plurality of heaters are provided, all of which are evenly arranged longitudinally, and a gap for airflow to pass through is left between two adjacent heaters.

[0013] The utility model is further configured as follows: the stirring device includes a stirring head and a second motor, the stirring head is inserted into the dehydration tank from the top of the dehydration tank, the second motor is located outside the dehydration tank, the second motor is used to drive the stirring head to rotate, and the rotation axis of the stirring head is vertical.

[0014] The utility model is further configured as follows: the stirring device further comprises two bevel gears, the stirring head and the second motor are respectively fixedly connected to a bevel gear, and the two bevel gears are meshed with each other.

[0015] The utility model is further configured as follows: the stirring head includes a central axis and at least one paddle, the central axis is driven to rotate by a second motor. The paddle includes a vertical rod and a horizontal rod, a plurality of vertical rods are provided, all vertical rods are radially distributed along the central axis, the top ends of all vertical rods are fixedly connected to a horizontal rod, the bottom ends of all vertical rods are fixedly connected to another horizontal rod, and both horizontal rods are fixedly connected to the central axis. When there are multiple paddles, all paddles are distributed around the rotation axis of the central axis.

[0016] The utility model is further configured that: the dosing device is communicated with the bottom of the dehydration tank.

[0017] The utility model is further configured as follows: the dosing device comprises a medicine tank and a quantitative component, the medicine tank is used to store demulsifier, and the quantitative component is used to quantitatively inject the demulsifier in the medicine tank into the dehydration tank.

[0018] The utility model is further configured as follows: the quantitative component includes a second valve, a limiting shell, a quantitative shell and a driving device. The driving device is used to drive the quantitative shell to slide horizontally and linearly in the limiting shell. A first liquid inlet is arranged at the top of the quantitative shell, a first liquid outlet is arranged at the bottom of the quantitative shell, a second liquid inlet is arranged at the top of the limiting shell, and a second liquid outlet is arranged at the bottom of the limiting shell. When the quantitative shell slides to the point where the first liquid inlet is connected to the second liquid inlet, the first liquid outlet is blocked by the limiting shell. When the quantitative shell slides to the point where the first liquid outlet is connected to the second liquid outlet, the first liquid inlet is blocked by the limiting shell. The medicine tank is connected to the second liquid inlet, and the second valve is arranged at the point where the medicine tank is connected to the second liquid inlet. The second liquid outlet is connected to the dehydration tank.

[0019] The utility model is further configured as follows: the second valve is an electrically controlled valve.

[0020] The utility model is further configured as follows: the driving device is an electric push rod.

[0021] The utility model is further configured as follows: the quantitative assembly further comprises a guide rod, one end of which is fixedly connected to the quantitative housing, and the other end of which extends out of the limit housing along the sliding direction of the quantitative housing and is connected to the electric push rod. At least one guide rod is provided.

[0022] The utility model is further configured to include a base, and the dehydration tank, the dosing device, the hot air device and the stirring device are all supported on the base.

[0023] In summary, compared with the prior art, the utility model has the following beneficial effects: the utility model provides a heavy oil dehydration and separation system, which includes a dehydration tank, a dosing device, a hot air device and a stirring device. An air flow channel is arranged in the wall of the dehydration tank, and hot air is transported into the air flow channel through the hot air device. The dosing device is used to inject a demulsifier into the dehydration tank, and the stirring device is used to stir the liquid in the dehydration tank. The system can achieve heating and stirring of the heavy oil and the demulsifier, improve the fluidity of the heavy oil, promote the evaporation and volatilization of water molecules, accelerate the separation speed, and improve the dehydration efficiency. The system uses hot air heating, and there are few impurities in the air flow. There is no need to frequently clean and maintain the air flow channel, and it is suitable for long-term continuous heavy oil dehydration operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the overall structure of the heavy oil dehydration and separation system in the embodiment.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the heavy oil dehydration and separation system in the embodiment.

[0026] Figure 3 It is a schematic diagram of the structure of the quantitative mechanism in the embodiment.

[0027] Figure 4 It is a schematic diagram of a dehydration tank and its internal device in an embodiment.

[0028] Figure 5 Schematic diagram of the structure of the hot air device in the embodiment.

[0029] In the figure: 1, bottom plate; 2, first support frame; 3, support plate; 4, medicine tank; 5, second valve; 6, first pipeline; 7, limit shell; 801, electric push rod; 802, connecting plate; 803, guide rod; 804, quantitative shell; 805, retaining ring; 9, fixing frame; 10, tank body; 11, extension plate; 12, stirring device; 1201, second motor; 1202, first bevel gear; 1203, second bevel gear; 1204, Stirring head; 13. second pipeline; 14. discharge port; 15. first valve; 16. mounting frame; 17. hot air device; 1701. dust cover; 1702. heater; 1703. exhaust duct; 1704. first motor; 1705. first transmission wheel; 1706. first fan; 1707. transmission belt; 1708. second transmission wheel; 1709. second fan; 1710. reinforcement ring; 18. insulation shell; 19. reinforcement block. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0032] Example

[0033] like Figure 1-5 The figure shows the basic structure of a preferred embodiment of the utility model, which provides a heavy oil dehydration and separation system, which includes a dehydration tank, a dosing device, a hot air device 17, a stirring device 12 and a first valve 15. An air flow channel is arranged in the wall of the dehydration tank, and the air flow channel is provided with an air inlet and an air outlet. The hot air device 17 is used to transport hot air to the air inlet. A feed inlet is arranged at the top of the dehydration tank, and a discharge port 14 is arranged at the bottom of the dehydration tank. The first valve 15 is installed at the discharge port 14. The dosing device is used to inject a demulsifier into the dehydration tank. The stirring device 12 is used to stir the liquid in the dehydration tank.

[0034] The system can heat and stir the heavy oil and demulsifier, improve the fluidity of the heavy oil, promote the evaporation and volatilization of water molecules, speed up the separation speed, and improve the dehydration efficiency. The system uses hot air heating, with less impurities in the airflow, and does not require frequent cleaning and maintenance of the airflow channel, which is suitable for long-term continuous heavy oil dehydration operations.

[0035] Specifically, the dehydration tank includes a tank body 10 and a heat-insulating shell 18, the discharge port 14 and the feed port are both arranged on the tank body 10, the dosing device is communicated with the tank body 10, and the stirring device 12 is used to stir the liquid in the tank body 10. The heat-insulating shell 18 is detachably connected to the outer wall of the tank body 10, and the airflow channel is arranged in the heat-insulating shell 18.

[0036] Specifically, the hot air device 17 includes a fan, a first motor 1704 and a heater 1702 . The first motor 1704 is used to drive the fan to rotate. The airflow delivered by the fan is heated by the heater 1702 and then enters the air inlet.

[0037] Specifically, the hot air device 17 further includes a transmission belt 1707 and a transmission wheel. Two fans are provided, and the two fans are distributed up and down. Each fan is fixedly connected to a transmission wheel, and the first motor 1704 is used to drive one of the transmission wheels to rotate. The transmission belt 1707 is tightened on the two transmission wheels so that the two transmission wheels rotate synchronously.

[0038] Specifically, the hot air device 17 further includes a dust cover 1701, and the dust cover 1701 is connected to the air inlet. In this embodiment, the dust cover 1701 is connected to the air inlet through an exhaust tube 1703. The fan, the heater 1702, the transmission belt 1707 and the transmission wheel are all located in the dust cover 1701, the two transmission wheels are rotatably connected to the dust cover 1701, and the heater 1702 is fixedly connected to the dust cover 1701. The dust cover 1701 is provided with a plurality of air inlet grilles or a plurality of air inlet meshes, and the air inlet grilles or the air inlet meshes are all located on the side of the fan away from the heater 1702. In this embodiment, the dust cover 1701 is provided with a plurality of air inlet grilles, and the first motor 1704 is fixed to the outside of the dust cover 1701 through a reinforcement ring 1710.

[0039] Specifically, a plurality of heaters 1702 are provided, all heaters 1702 are evenly arranged longitudinally, and a gap for airflow is left between two adjacent heaters 1702. In this embodiment, the heater 1702 is an electric heater.

[0040] Specifically, the stirring device 12 includes a stirring head 1204 and a second motor 1201. The stirring head 1204 is inserted into the dehydration tank from the top of the dehydration tank. The second motor 1201 is located outside the dehydration tank. The second motor 1201 is used to drive the stirring head 1204 to rotate, and the rotation axis of the stirring head 1204 is vertical.

[0041] Specifically, the stirring device 12 further includes two bevel gears, the stirring head 1204 and the second motor 1201 are each fixedly connected to a bevel gear, and the two bevel gears mesh with each other to reduce the height of the heavy oil dehydration and separation system.

[0042] In this embodiment, an extension plate 11 is fixed on the top of the tank body 10, and the second motor 1201 is fixed on the extension plate 11 to meet the height requirement of the two bevel gears meshing with each other. In this embodiment, a reinforcement block 19 is also fixed at the connection between the extension plate 11 and the tank body 10 to improve the stability of the connection between the extension plate 11 and the tank body 10.

[0043] Specifically, the stirring head 1204 includes a central axis and at least one paddle, and the central axis is driven to rotate by the second motor 1201. The paddle includes a vertical rod and a horizontal rod, and a plurality of vertical rods are provided, and all vertical rods are radially distributed along the central axis, and the top ends of all vertical rods are fixedly connected to a horizontal rod, and the bottom ends of all vertical rods are fixedly connected to another horizontal rod, and both horizontal rods are fixedly connected to the central axis. In this embodiment, there are multiple paddles, and all paddles are distributed around the rotation axis of the central axis.

[0044] Specifically, the dosing device is connected to the bottom of the dehydration tank to ensure that the oil discharged from the dehydration tank is fully mixed with the demulsifier, so that the oil discharged from the dehydration tank can be further dehydrated during the standing process.

[0045] Specifically, the dosing device includes a reagent tank 4 and a quantitative component. The reagent tank 4 is used to store demulsifiers, and the quantitative component is used to quantitatively inject the demulsifiers in the reagent tank 4 into the dehydration tank.

[0046] Specifically, the quantitative component includes a second valve 5, a limiting shell 7, a quantitative shell 804 and a driving device. The driving device is used to drive the quantitative shell 804 to slide horizontally and linearly in the limiting shell 7. A first liquid inlet is arranged at the top of the quantitative shell 804, a first liquid outlet is arranged at the bottom of the quantitative shell 804, a second liquid inlet is arranged at the top of the limiting shell 7, and a second liquid outlet is arranged at the bottom of the limiting shell 7. When the quantitative shell 804 slides to the point where the first liquid inlet is connected to the second liquid inlet, the first liquid outlet is blocked by the limiting shell 7. When the quantitative shell 804 slides to the point where the first liquid outlet is connected to the second liquid outlet, the first liquid inlet is blocked by the limiting shell 7. The medicine tank 4 is connected to the second liquid inlet, and the second valve 5 is arranged at the point where the medicine tank 4 is connected to the second liquid inlet. The second liquid outlet is connected to the tank body 10.

[0047] In this embodiment, the medicine tank 4 is connected to the second liquid inlet through the first pipe 6. The second liquid outlet is connected to the tank body 10 through the second pipe 13, the top end of the second pipe 13 is connected to the second liquid outlet, and the bottom end of the second pipe 13 is connected to the tank body 10.

[0048] Specifically, the second valve 5 is an electrically controlled valve.

[0049] Specifically, the driving device is an electric push rod 801 , and the electric push rod 801 is fixed to the outside of the limiting shell 7 through a retaining ring 805 .

[0050] Specifically, the quantitative assembly further includes a guide rod 803, one end of which is fixedly connected to the quantitative housing 804, and the other end of which extends out of the limit housing 7 along the sliding direction of the quantitative housing 804 and is connected to the electric push rod 801. At least one guide rod 803 is provided. In this embodiment, two guide rods 803 are provided, and the two guide rods 803 are respectively located on both sides of the electric push rod 801. The two guide rods 803 and the electric push rod 801 are fixedly connected by a connecting plate 802.

[0051] This embodiment also includes a base, which includes a bottom plate 1, a first support frame 2, a support plate 3, a fixing frame 9 and a mounting frame 16. The limiting shell 7 and the medicine tank 4 are both fixed on the support plate 3, and the second pipeline 13 passes through the support plate 3 from top to bottom and is connected to the tank body 10, and the support plate 3 is fixed on the first support frame 2. The dehydration tank is fixed on the fixing frame 9. The dust cover 1701 is fixed on the mounting frame 16. The first support frame 2, the fixing frame 9 and the mounting frame 16 are all fixed on the bottom plate 1.

[0052] In summary, the present embodiment provides a heavy oil dehydration and separation system, which includes a dehydration tank, a dosing device, a hot air device 17 and a stirring device 12. An air flow channel is provided in the wall of the dehydration tank, and hot air is transported into the air flow channel through the hot air device 17. The dosing device is used to inject a demulsifier into the dehydration tank, and the stirring device 12 is used to stir the liquid in the dehydration tank. The system can achieve heating and stirring of the heavy oil and the demulsifier, improve the fluidity of the heavy oil, promote the evaporation and volatilization of water molecules, accelerate the separation speed, and improve the dehydration efficiency. The system uses hot air heating, and there are few impurities in the air flow. There is no need to frequently clean and maintain the air flow channel, and it is suitable for long-term continuous heavy oil dehydration operations.

[0053] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heavy oil dehydration and separation system, characterized by: The invention comprises a dehydration tank, a dosing device, a hot air device (17), a stirring device (12) and a first valve (15); an air flow channel is arranged in the wall of the dehydration tank, the air flow channel is provided with an air inlet and an air outlet, the hot air device (17) is used to transport hot air to the air inlet; a feed inlet is arranged at the top of the dehydration tank, a discharge port (14) is arranged at the bottom of the dehydration tank, and the first valve (15) is installed at the discharge port (14); the dosing device is used to inject a demulsifier into the dehydration tank; and the stirring device (12) is used to stir the liquid in the dehydration tank.

2. A heavy oil dehydration and separation system according to claim 1, characterized in that: The dehydration tank comprises a tank body (10) and a heat-insulating shell (18); the discharge port (14) and the feed port are both arranged on the tank body (10); the dosing device is connected to the tank body (10); the stirring device (12) is used to stir the liquid in the tank body (10); the heat-insulating shell (18) is detachably connected to the outer wall of the tank body (10); and the air flow channel is arranged in the heat-insulating shell (18).

3. A heavy oil dehydration and separation system according to claim 1 or 2, characterized in that: The hot air device (17) comprises a fan, a first motor (1704) and a heater (1702), wherein the first motor (1704) is used to drive the fan to rotate, and the airflow delivered by the fan is heated by the heater (1702) and then enters the air inlet.

4. A heavy oil dehydration and separation system according to claim 3, characterized in that: The hot air device (17) also includes a transmission belt (1707) and a transmission wheel; two fans are provided, and the two fans are distributed up and down; each fan is fixedly connected to a transmission wheel, and the first motor (1704) is used to drive one of the transmission wheels to rotate; the transmission belt (1707) is tensioned on the two transmission wheels so that the two transmission wheels rotate synchronously.

5. A heavy oil dehydration and separation system according to claim 4, characterized in that: The hot air device (17) further comprises a dust cover (1701), wherein the dust cover (1701) is connected to the air inlet, and the fan, the heater (1702), the transmission belt (1707) and the transmission wheel are all located in the dust cover (1701), and a plurality of air inlet grilles or a plurality of air inlet meshes are arranged on the dust cover (1701), and the air inlet grilles or the air inlet meshes are all located on the side of the fan away from the heater (1702).

6. A heavy oil dehydration and separation system according to claim 5, characterized in that: A plurality of the heaters (1702) are provided, and all the heaters (1702) are evenly arranged longitudinally, with a gap for airflow to pass between two adjacent heaters (1702).

7. A heavy oil dehydration and separation system according to claim 1, characterized in that: The stirring device (12) comprises a stirring head (1204) and a second motor (1201), wherein the stirring head (1204) is inserted into the dehydration tank from the top of the dehydration tank, and the second motor (1201) is located outside the dehydration tank. The second motor (1201) is used to drive the stirring head (1204) to rotate, and the rotation axis of the stirring head (1204) is vertical.

8. A heavy oil dehydration and separation system according to claim 7, characterized in that: The stirring device (12) further comprises two bevel gears, the stirring head (1204) and the second motor (1201) are each fixedly connected to a bevel gear, and the two bevel gears are meshed with each other.

9. A heavy oil dehydration and separation system according to claim 7 or 8, characterized in that: The stirring head (1204) includes a central axis and at least one paddle, and the central axis is driven to rotate by a second motor (1201); the paddle includes a vertical rod and a horizontal rod, and a plurality of vertical rods are provided, and all vertical rods are radially distributed along the central axis, and the top ends of all vertical rods are fixedly connected to a horizontal rod, and the bottom ends of all vertical rods are fixedly connected to another horizontal rod, and both horizontal rods are fixedly connected to the central axis; when there are multiple paddles, all the paddles are distributed around the rotation axis of the central axis.

10. A heavy oil dehydration and separation system according to claim 1, characterized in that: The dosing device is communicated with the bottom of the dehydration tank.

11. A heavy oil dehydration and separation system according to claim 10, characterized in that: The dosing device comprises a medicine tank (4) and a quantitative component, wherein the medicine tank (4) is used to store demulsifier, and the quantitative component is used to quantitatively inject the demulsifier in the medicine tank (4) into the dehydration tank.

12. A heavy oil dehydration and separation system according to claim 11, characterized in that: The quantitative component comprises a second valve (5), a limiting shell (7), a quantitative shell (804) and a driving device; the driving device is used to drive the quantitative shell (804) to slide horizontally and linearly in the limiting shell (7); a first liquid inlet is arranged at the top of the quantitative shell (804), a first liquid outlet is arranged at the bottom of the quantitative shell (804), a second liquid inlet is arranged at the top of the limiting shell (7), and a second liquid outlet is arranged at the bottom of the limiting shell (7); when the quantitative shell (804) slides to the point where the first liquid inlet is connected to the second liquid inlet, the first liquid outlet is blocked by the limiting shell (7); when the quantitative shell (804) slides to the point where the first liquid outlet is connected to the second liquid outlet, the first liquid inlet is blocked by the limiting shell (7); the medicine tank (4) is connected to the second liquid inlet, and the second valve (5) is arranged at the point where the medicine tank (4) is connected to the second liquid inlet; the second liquid outlet is connected to the dehydration tank.

13. A heavy oil dehydration and separation system according to claim 12, characterized in that: The second valve (5) is an electrically controlled valve.

14. A heavy oil dehydration and separation system according to claim 12, characterized in that: The driving device is an electric push rod (801).

15. A heavy oil dehydration and separation system according to claim 14, characterized in that: The quantitative component further comprises a guide rod (803), one end of which is fixedly connected to the quantitative shell (804), and the other end of which extends out of the limit shell (7) along the sliding direction of the quantitative shell (804) and is connected to the electric push rod (801); at least one guide rod (803) is provided.

16. A heavy oil dehydration and separation system according to claim 1, characterized in that: It also comprises a base, on which the dehydration tank, the dosing device, the hot air device (17) and the stirring device (12) are all supported.

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