Dehydration tank for base oil production

Abstract

The utility model discloses a dehydration tank for base oil production, which comprises a dehydration tank main body and a control system, an oil inlet at the top of the dehydration tank main body is communicated with an oil delivery pipe, the oil delivery pipe is provided with a filtering adsorption box, and the oil delivery pipe is also provided with an oil delivery pump; four pulse microwave generators are mounted at the top of the dehydration tank main body; the bottom of the dewatering tank main body is communicated with a drain pipe; a drain valve is arranged at the bottom of the drain pipe; an oil discharge pipe communicated with the interior of the dewatering tank main body is also arranged on the side wall of the dewatering tank main body above the hopper-shaped structure; an oil discharge valve is arranged on the oil discharge pipe; according to the oil-water separation device, demulsification is completed by arranging the pulse microwave generator, oil-water separation is achieved under the sedimentation effect, the oil-water separation efficiency is greatly improved, the heating temperature of the pulse microwave generator is low, base oil can be prevented from going bad due to the too high temperature, water in the base oil is effectively removed, and the oil-water separation efficiency is improved. And the energy consumption is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of dehydration tank technology, specifically to a dehydration tank for base oil production. Background Technology

[0002] During the production and processing of base oils, moisture may exist in the form of free water, dissolved water, or water of crystallization. This moisture can affect the physical and chemical properties of the base oil, and may even cause problems such as corrosion and oxidation, thereby affecting the performance and service life of the base oil.

[0003] Currently, commonly used methods for dehydrating base oils include physical adsorption, sedimentation, thermochemical sedimentation, and electro-dehydration. Physical adsorption and sedimentation methods have low adsorption efficiency. Thermochemical sedimentation mainly removes water by evaporating it from the base oil through heating, but this heating method can easily lead to the deterioration of the base oil. Electro-dehydration uses an electric field to make water droplets accumulate and grow larger, so that they settle and separate under the action of gravity. However, this process consumes a lot of electrical energy. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a dehydration tank for base oil production, which can effectively remove water from base oil while reducing energy consumption.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] A dehydration tank for base oil production includes a tank body and a control system. The top of the tank body has an oil inlet connected to an oil delivery pipe, which is equipped with a filter adsorption box and an oil pump. Four pulse microwave generators are installed on the top of the tank body to assist in the separation of base oil and water within the tank. The lower part of the tank body has a bucket-shaped structure with a larger diameter at the top and a smaller diameter at the bottom. The bottom of the tank body is connected to a drain pipe with a drain valve at the bottom. An oil drain pipe, connected to the interior of the tank body, is also installed on the side wall of the tank body above the bucket-shaped structure, and an oil drain valve is installed on the drain pipe. The control system includes a power module and a controller. The controlled terminals of the pulse microwave generators, oil pump, drain valve, and oil drain valve are respectively connected to the output terminal of the controller.

[0007] The aforementioned dehydration tank for base oil production has a pulse microwave generator arranged in a circular shape with four pulse microwave generators evenly spaced.

[0008] The aforementioned dehydration tank for base oil production includes an infrared temperature sensor installed on the top wall inside the main body of the dehydration tank for detecting the internal temperature of the main body of the dehydration tank. The output terminal of the infrared temperature sensor is connected to the input terminal of the controller.

[0009] The aforementioned dehydration tank for base oil production has a laser level sensor installed on the upper side wall of the drain pipe for detecting the water level inside the drain pipe. The output end of the laser level sensor is connected to the input end of the controller.

[0010] The aforementioned dehydration tank for base oil production has a corrugated guide plate inside the main body of the dehydration tank to increase the settling area and accelerate the aggregation of water droplets. The corrugated guide plate is inclined downward and arranged at staggered intervals.

[0011] The aforementioned dehydration tank for base oil production has a composite coating composed of polytetrafluoroethylene and nano-silica on the top surface of the flow guide corrugated plate.

[0012] The aforementioned dehydration tank for base oil production has a filter membrane that allows water molecules to pass through but prevents oil molecules from passing through, located between the bottommost corrugated guide plate and the main side wall of the dehydration tank. The filter membrane is located below the oil drain pipe.

[0013] The aforementioned dehydration tank for base oil production includes a filter membrane that is one of the following: a cellulose-based nanofiber membrane, an alumina ceramic-modified membrane, a metal mesh membrane formed by coating titanium dioxide nanoparticles onto a stainless steel mesh, or a graphene oxide membrane.

[0014] The aforementioned dehydration tank for base oil production has an inlet pipe at the top of its main body that communicates with the interior of the tank body to deliver inert gas into the tank body to reduce the risk of deflagration, and an exhaust pipe that communicates with the interior of the tank body to ensure pressure balance inside the tank body.

[0015] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0016] This invention provides a dehydration tank for base oil production. By using a pulsed microwave generator to demulsify the oil, oil and water are separated through sedimentation, which greatly improves the efficiency of oil-water separation. Moreover, the pulsed microwave generator has a low heating temperature, which can prevent the base oil from deteriorating due to excessive temperature. Furthermore, by setting staggered corrugated guide plates inside the dehydration tank, the sedimentation area can be increased, thereby accelerating the polymerization of water molecules and completing oil-water separation more quickly. This effectively removes water from the base oil and greatly reduces energy consumption. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0019] The components include: 1. Dehydration tank body, 2. Oil delivery pipe, 3. Filter adsorption box, 4. Drain pipe, 5. Drain valve, 6. Oil discharge pipe, 7. Pulse microwave generator, 8. Air inlet pipe, 9. Exhaust pipe, 10. Infrared temperature sensor, 11. Laser liquid level sensor, 12. Flow guide corrugated plate, and 13. Filter membrane. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] A dehydration tank for base oil production, such as Figures 1 to 2 As shown, it includes a dehydration tank body 1 and a control system. The oil inlet at the top of the dehydration tank body 1 is connected to the oil delivery pipe 2. A filter adsorption box 3 is installed on the oil delivery pipe 2, and an oil delivery pump is also installed on the oil delivery pipe 2.

[0022] The filter adsorption box 3 includes a box body, and a filter screen is attached to the inner wall of the box body. The filter screen contains activated carbon particles, which are used to initially adsorb water in the base oil. At the same time, the filter screen can intercept the activated carbon particles to prevent them from entering the dehydration tank body 1 with the base oil.

[0023] Four pulse microwave generators 7 are installed on the top of the dehydration tank body 1 to assist in the water-oil separation of the base oil inside the dehydration tank body 1. Specifically, the pulse microwave generators 7 selectively heat water molecules, destroy the emulsion interface film, and cause oil molecules to aggregate with each other and water molecules to aggregate with each other, thereby completing the water-oil separation under the action of gravity sedimentation.

[0024] The pulse microwave generator 7 is arranged in a ring shape, and the four pulse microwave generators 7 are evenly spaced, which can cover the top of the dehydration tank body 1 to form a ring radiation field.

[0025] An infrared temperature sensor 10 is installed on the top wall inside the dehydration tank body 1 to detect the temperature inside the dehydration tank body 1 and prevent the base oil from deteriorating due to excessive temperature.

[0026] The lower part of the dehydration tank body 1 has a bucket-shaped structure with a larger diameter at the top and a smaller diameter at the bottom. The bottom of the dehydration tank body 1 is connected to the drain pipe 4, and a drain valve 5 is installed at the bottom of the drain pipe 4.

[0027] A laser liquid level sensor 11 is installed on the upper side wall of the drain pipe 4 to detect the water level inside the drain pipe 4, so as to facilitate timely drainage.

[0028] The dehydration tank body 1 located above the bucket-shaped structure is also equipped with an oil drain pipe 6 that communicates with the interior of the dehydration tank body 1. An oil drain valve is installed on the oil drain pipe 6 to drain the base oil after water-oil separation.

[0029] The dehydration tank body 1 is equipped with a flow guide corrugated plate 12. The flow guide corrugated plate 12 is inclined downward and arranged at intervals. Since water molecules and oil molecules are linked together in the base oil after being treated by the pulse microwave generator 7, the settling area can be increased by setting multiple layers of staggered flow guide corrugated plates 12 during the downward settling process, thus accelerating the coalescence and settling of water droplets.

[0030] A composite coating composed of polytetrafluoroethylene and nano-silica is provided on the top surface of the flow guide corrugated plate 12 to prevent excessive deposition of base oil on the flow guide corrugated plate 12 during the base oil settling process.

[0031] A water filter membrane 13 is provided between the bottom corrugated guide plate 12 and the side wall of the dehydration tank body 1. The water filter membrane 13 is located below the oil drain pipe 6, which allows water molecules to pass through but prevents oil molecules from passing through, thereby achieving further separation of water and oil.

[0032] In this embodiment, the water filter membrane 13 is a cellulose-based nanofiber membrane. In other embodiments, the water filter membrane 13 may also be an alumina ceramic modified membrane, a metal mesh membrane formed by coating titanium dioxide nanoparticles with stainless steel mesh, a graphene oxide membrane, etc.

[0033] The top of the dehydration tank body 1 is respectively provided with an air inlet pipe 8 and an exhaust pipe 9 that are connected to the inside of the dehydration tank body 1. The air inlet pipe 8 is used to deliver inert gas into the dehydration tank body 1, thereby reducing the risk of deflagration during the radiation of the pulse microwave generator. The exhaust pipe 9 is used to ensure the pressure balance inside the dehydration tank body 1.

[0034] The control system includes a power supply module and a controller. The power supply module supplies power to the electrical components, and the controller receives signals and sends control commands.

[0035] The controlled ends of the pulse microwave generator 7, oil pump, drain valve 5, and drain valve are respectively connected to the output end of the controller, and the output ends of the infrared temperature sensor 10 and laser liquid level sensor 11 are respectively connected to the input end of the controller.

[0036] The operation steps of this utility model are as follows:

[0037] First, the base oil is sent into the filter adsorption box 3 through the oil pipeline 2 to absorb the water in the base oil. Then, it is sent into the dehydration tank body 1 for separation.

[0038] After the base oil enters the main body 1 of the dehydration tank, it is first treated with pulse microwave by a pulse microwave generator to complete the demulsification. Then, the base oil settles under the action of gravity and passes through the flow guide corrugated plate. Under the guidance of the tilt angle and corrugated shape of the corrugated plate, the base oil forms a wave-shaped flow, which increases the probability of droplet collision, increases the settling area, and thus accelerates the efficiency of water molecule polymerization.

[0039] After separation, oil and water molecules form a distribution structure with oil on top and water on the bottom. At the same time, the water molecules are allowed to pass through the filter membrane at the bottom and enter the drain pipe 4 for collection. When the collected liquid reaches a certain height and is detected by the laser liquid level sensor 11, the drain valve is opened to discharge the water. Meanwhile, the oil on the top layer can be discharged by opening the drain valve on the oil drain pipe, thus achieving oil-water separation.

[0040] The pulsed microwave generator only needs to heat the crude oil to 40-50℃ to complete the demulsification, while the traditional heat deposition requires heating to 80-100℃, which is much lower than the temperature of traditional heat deposition. This avoids the volatilization and deterioration of light components. Moreover, microwaves have strong penetrability and energy consumption is reduced by 30%-40% compared with traditional heating, resulting in low energy efficiency.

[0041] This invention provides a dehydration tank for base oil production. By using a pulsed microwave generator to demulsify the oil, oil and water are separated through sedimentation, which greatly improves the efficiency of oil-water separation. Moreover, the pulsed microwave generator has a low heating temperature, which can prevent the base oil from deteriorating due to excessive temperature. Furthermore, by setting staggered corrugated guide plates inside the dehydration tank, the sedimentation area can be increased, thereby accelerating the polymerization of water molecules and completing oil-water separation more quickly. This effectively removes water from the base oil and greatly reduces energy consumption.

Claims

1. A dehydration tank for base oil production, characterized by: The system includes a dehydration tank body (1) and a control system. The oil inlet at the top of the dehydration tank body (1) is connected to the oil delivery pipe (2). A filter adsorption box (3) is installed on the oil delivery pipe (2), and an oil pump is also installed on the oil delivery pipe (2). Four pulse microwave generators (7) are installed on the top of the dehydration tank body (1) to assist in completing the separation of base oil and water inside the dehydration tank body (1). The lower part of the dehydration tank body (1) has a bucket-shaped structure with a larger diameter at the top and a smaller diameter at the bottom. The bottom of the dehydration tank body (1) is connected to the drain pipe (4), and a drain valve (5) is installed at the bottom of the drain pipe (4). An oil drain pipe (6) connected to the inside of the dehydration tank body (1) is also installed on the side wall of the dehydration tank body (1) above the bucket-shaped structure, and an oil drain valve is installed on the oil drain pipe (6). The control system includes a power module and a controller. The controlled ends of the pulse microwave generator (7), the oil delivery pump, the drain valve (5), and the oil drain valve are respectively connected to the output end of the controller.

2. The dehydration tank for base oil production according to claim 1, characterized in that: The pulse microwave generator (7) is arranged in a circular shape and the four pulse microwave generators (7) are evenly spaced.

3. The dewatering tank for base oil production according to claim 1, characterized in that: An infrared temperature sensor (10) for detecting the internal temperature of the dehydration tank body (1) is provided on the top wall inside the dehydration tank body (1). The output end of the infrared temperature sensor (10) is connected to the input end of the controller.

4. The dewatering tank for base oil production according to claim 1, characterized by: A laser level sensor (11) for detecting the water level inside the drain pipe (4) is installed on the upper side wall of the drain pipe (4). The output end of the laser level sensor (11) is connected to the input end of the controller.

5. The dewatering tank for base oil production according to claim 1, characterized in that: The dehydration tank body (1) is provided with a flow-guiding corrugated plate (12) to increase the settling area and accelerate the aggregation of water droplets. The flow-guiding corrugated plate (12) is inclined downward and the flow-guiding corrugated plate (12) is arranged at intervals and staggered.

6. The dewatering tank for base oil production according to claim 5, characterized in that: The top surface of the flow guide corrugated plate (12) is provided with a composite coating composed of polytetrafluoroethylene and nano-silica.

7. The dewatering tank for base oil production according to claim 5, characterized in that: A water filter membrane (13) that allows water molecules to pass through but not oil molecules is provided between the bottom corrugated plate (12) and the side wall of the dehydration tank body (1). The water filter membrane (13) is located below the oil drain pipe (6).

8. The dewatering tank for base oil production according to claim 7, characterized by: The water filter membrane (13) is one of the following: cellulose-based nanofiber membrane, alumina ceramic modified membrane, metal mesh membrane formed by coating titanium dioxide nanoparticles with stainless steel mesh, or graphene oxide membrane.

9. The dewatering tank for base oil production according to claim 1, characterized by: The top of the dehydration tank body (1) is respectively provided with an air inlet pipe (8) that communicates with the inside of the dehydration tank body (1) and delivers inert gas into the dehydration tank body (1) to reduce the risk of deflagration, and an exhaust pipe (9) that communicates with the inside of the dehydration tank body (1) and ensures the pressure balance inside the dehydration tank body (1).

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