Petroleum chemical oil-water separation device

Abstract

The utility model discloses a kind of petroleum chemical oil-water separation equipment, belong to oil-water separation technical field, in the utility model, including protective shell, protective shell has cavity, water distribution device is provided at protective shell cavity bottom, water distribution device one end is communicated with liquid inlet pipe, liquid inlet pipe is communicated with the inner wall of protective shell, water distribution device other end is connected with first motor, first motor is fixedly connected on the outer wall of protective shell, baffle is fixedly connected in the middle of protective shell cavity, baffle is located above water distribution device, the top of protective shell cavity is connected with connecting shaft, one end of connecting shaft is connected with second motor, second motor is fixedly connected on the top outer wall of protective shell, the other end of connecting shaft is connected with oil scraping device, oil scraping device bottom is communicated with oil outlet pipe, oil outlet pipe is communicated with the inner wall of protective shell, one side of protective shell middle is communicated with liquid outlet pipe, liquid outlet pipe one end is connected with connecting pipe, connecting pipe other end is connected with cyclone oil-water separator, the pretreatment of petroleum oil-water mixture is realized.

Description

Technical Field

[0001] This utility model belongs to the field of oil-water separation technology, and in particular relates to a petrochemical oil-water separation device. Background Technology

[0002] Petroleum is a viscous, dark brown liquid, primarily composed of a mixture of various alkanes, cycloalkanes, and aromatic hydrocarbons. It is mainly used as fuel oil and gasoline, and is also a raw material for many chemical industrial products. Petroleum exists in various forms, including crude oil, natural gas, liquefied natural gas, and natural tar. Oil-water separation refers to the process of removing water from petroleum to prevent its negative impact on petroleum processing and use. Water in petroleum can cause problems such as pipe blockage, equipment corrosion, and reduced product quality; therefore, oil-water separation is a crucial step in petrochemical processing and treatment.

[0003] In the petrochemical production process, traditional oil-water separation processes mostly adopt gravity separation methods, which occupy a large area and have a slow oil-water separation rate. After the oil and water separate, there is no measure to actively remove the oil layer, which makes it easy for the oil layer to re-emulsify and mix with water after being disturbed. When the petroleum oil-water mixture is not pretreated, it has a high viscosity and is prone to forming an oil film at the liquid inlet, causing pipeline blockage. The petrochemical oil-water separation operation often uses cyclone oil-water separators. When the viscosity of the inflowing liquid is high, it will increase the workload of the cyclone oil-water separator and require more frequent maintenance of the equipment. Utility Model Content

[0004] The purpose of this invention is to provide a petrochemical oil-water separation device to solve the problems of slow gravity separation speed and high viscosity of oil-water mixtures without pretreatment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a petrochemical oil-water separation device, comprising a protective shell, the protective shell having a cavity, a water distribution device being provided at the bottom of the cavity, one end of the water distribution device being connected to an inlet pipe, the inlet pipe being connected to the inner wall of the protective shell, the other end of the water distribution device being connected to a first motor, the first motor being fixedly connected to the outer wall of the protective shell, a baffle being fixedly connected in the middle of the cavity of the protective shell, the baffle being located above the water distribution device, a connecting shaft being connected to the top of the cavity of the protective shell, one end of the connecting shaft being connected to a second motor, the second motor being fixedly connected to the top outer wall of the protective shell, the other end of the connecting shaft being connected to an oil scraping device, the bottom of the oil scraping device being connected to an oil discharge pipe, the oil discharge pipe being connected to the inner wall of the protective shell, an outlet pipe being connected to one side of the middle of the protective shell, one end of the outlet pipe being connected to a connecting pipe, the other end of the connecting pipe being connected to a cyclone oil-water separator.

[0006] As a further description of the above technical solution: The water distribution device includes a pressure-resistant tank, one end of which is connected to a liquid inlet pipe. Multiple water distribution grooves are provided on the outer wall of the pressure-resistant tank. A rotating shaft is provided inside the pressure-resistant tank. One end of the rotating shaft is connected to a first motor. The output end of the first motor passes through a protective shell and is fixedly connected to one end of the rotating shaft. Spiral blades are arranged around the outer wall of the rotating shaft.

[0007] As a further description of the above technical solution: The water distribution trough is formed around the outer wall of the pressure-resistant barrel along the axis, and the circumference angle of the water distribution trough is 180 degrees. The output end of the first motor passes through the protective shell and is fixedly connected to one end of the rotating shaft.

[0008] As a further description of the above technical solution: The baffle is inclinedly disposed in the middle of the cavity of the protective shell, and the angle between the inclined surface of the baffle and the horizontal plane is 30 degrees.

[0009] As a further description of the above technical solution: The oil scraping device includes an oil storage box, and multiple oil scraping grooves are arranged around the outer wall of the oil storage box along the axis. An oil scraping plate is fixedly connected to the bottom of the inner wall of the oil scraping groove. An oil outlet is opened on the bottom inner wall of the oil storage box, and the oil outlet is connected to one end of the oil drain pipe.

[0010] As a further description of the above technical solution: One end of the connecting shaft is rotatably connected to the inner wall of the top of the protective shell, the output end of the second motor passes through the protective shell and is fixedly connected to one end of the connecting shaft, and the other end of the connecting shaft is fixedly connected to the outer wall of the top of the oil storage box.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, a water distribution device is provided at the bottom of the protective shell cavity. The water distribution device uses centrifugal force to disperse the petroleum oil-water mixture into smaller droplets and distribute them evenly in the protective shell cavity. This reduces the adhesion and accumulation of oil at the inlet pipe and makes the petroleum oil-water mixture easier to separate. Since the oil density is less than that of water, the oil layer floats on the surface of the water layer. When the liquid level rises, the oil layer gathers along the outer wall of the lower inclined surface of the baffle towards the gap between the baffle and the inner wall of the protective shell, making the oil surface gather faster and the time required for settling and separation shorter. When the liquid level exceeds the highest point of the baffle inclined surface, the lower layer of liquid flows along the outer wall of the upper inclined surface of the baffle to the outlet pipe and flows into the cyclone oil-water separator through the connecting pipe, thus achieving pretreatment of the oil-water mixture before it enters the cyclone oil-water separator.

[0012] 2. In this utility model, the top of the protective shell cavity is connected to an oil scraping device via a connecting shaft. The bottom surface of the oil scraping groove of the oil scraping device is below the oil surface. When an oil layer of the petroleum oil-water mixture forms in the gap between the baffle and the protective shell, the oil scraping device rotates to scrape off a portion of the oil from the oil surface and discharges and collects the oil from the oil drain pipe, which facilitates further processing of the petroleum. At the same time, it reduces the viscosity of the petroleum oil-water mixture flowing into the cyclone oil-water separator and reduces the load on the cyclone oil-water separator during operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of a petrochemical oil-water separation device proposed in this utility model; Figure 2 This is a schematic diagram of the disassembled structure of a petrochemical oil-water separation device proposed in this utility model; Figure 3 This is a partial half-sectional structural diagram of a petrochemical oil-water separation device proposed in this utility model. Figure 4 This utility model proposes a petrochemical oil-water separation device. Figure 3 A magnified structural diagram of part A in the middle; Figure 5 This utility model proposes a petrochemical oil-water separation device. Figure 3 A magnified structural diagram of part B.

[0014] Legend: 1. Protective shell; 2. Water distribution device; 201. Pressure tank; 202. Rotating shaft; 203. Spiral blade; 204. Water distribution trough; 3. Liquid inlet pipe; 4. First motor; 5. Baffle; 6. Liquid outlet pipe; 7. Connecting shaft; 8. Oil scraping device; 801. Oil storage box; 802. Oil scraping trough; 803. Oil scraper; 804. Oil outlet; 9. Oil drain pipe; 10. Second motor; 11. Swirl oil-water separator; 12. Connecting pipe. Detailed Implementation

[0015] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-5This utility model provides a technical solution: a petrochemical oil-water separation device, including a protective shell 1, the protective shell 1 having a cavity, a water distribution device 2 provided at the bottom of the cavity of the protective shell 1, one end of the water distribution device 2 being connected to a liquid inlet pipe 3, the liquid inlet pipe 3 being connected to the inner wall of the protective shell 1, the other end of the water distribution device 2 being connected to a first motor 4, the first motor 4 being fixedly connected to the outer wall of the protective shell 1, a baffle 5 being fixedly connected in the middle of the cavity of the protective shell 1, the baffle 5 being located above the water distribution device 2, a connecting shaft 7 being connected to the top of the cavity of the protective shell 1, one end of the connecting shaft 7 being connected to a second motor 10, the second motor 10 being fixedly connected to the top outer wall of the protective shell 1, the other end of the connecting shaft 7 being connected to an oil scraping device 8, the bottom of the oil scraping device 8 being connected to an oil discharge pipe 9, the oil discharge pipe 9 being connected to the inner wall of the protective shell 1, a liquid outlet pipe 6 being connected to one side of the middle of the protective shell 1, one end of the liquid outlet pipe 6 being connected to a connecting pipe 12, the other end of the connecting pipe 12 being connected to a cyclone oil-water separator 11.

[0017] The water distribution device 2 includes a pressure-resistant tank 201, one end of which is connected to an inlet pipe 3. Multiple water distribution grooves 204 are provided on the outer wall of the pressure-resistant tank 201. A rotating shaft 202 is provided inside the pressure-resistant tank 201. One end of the rotating shaft 202 is connected to a first motor 4. The output end of the first motor 4 passes through the protective shell 1 and is fixedly connected to one end of the rotating shaft. Spiral blades 203 are arranged around the outer wall of the rotating shaft 202.

[0018] A water distribution trough 204 is formed around the outer wall of the pressure-resistant barrel 201 along the axis. The water distribution trough 204 has a circumferential angle of 180 degrees. The output end of the first motor 4 passes through the protective shell 1 and is fixedly connected to one end of the rotating shaft 202.

[0019] The baffle 5 is inclinedly disposed in the middle of the cavity of the protective shell 1, and the angle between the inclined surface of the baffle 5 and the horizontal plane is 30 degrees.

[0020] Specifically, a first motor 4 is fixedly connected to the outer wall of the protective shell 1. The output end of the first motor 4 passes through the protective shell 1 and is fixedly connected to one end of the rotating shaft 202. A spiral blade 203 is arranged around the outer wall of the rotating shaft 202. The output end of the first motor 4 drives the rotating shaft 202 to rotate, and the spiral blade 203 rotates with the rotating shaft 202. One end of the pressure-resistant tank 201 is connected to the liquid inlet pipe 3. A water distribution trough 204 is arranged around half of the outer wall of the pressure-resistant tank 201 along the axis. The first motor 4 drives the spiral blade 203 to rotate at high speed. After the petroleum oil-water mixture enters the spiral blade 203, it is thrown towards the inner wall of the pressure-resistant tank 201 due to centrifugal force. The petroleum oil-water mixture hits the inner wall of the pressure-resistant tank 201 and disperses into smaller droplets, making it easier for the oil and water to separate. The small droplets flow down the inner wall of the pressure-resistant tank 201 and flow out from the water distribution trough 204, so that the petroleum oil-water mixture is in the air of the protective shell 1. The distribution at the bottom of the cavity is more uniform. Oil, being less dense than water, floats on the surface of the water. A baffle 5 is provided in the middle of the cavity of the protective shell 1. The inclined surface of the baffle 5 is used to guide the oil above the surface of the petroleum oil-water mixture to gather into an oil surface. The cross-sectional projected area of ​​the baffle 5 is smaller than the cross-sectional area of ​​the cavity of the protective shell 1. A gap is provided between the uppermost end of the inclined surface of the baffle 5 and the inner wall of the protective shell 1. When the liquid surface rises along the lower inclined surface of the baffle 5, the oil layer at the top of the liquid surface is more likely to gather into the gap between the baffle 5 and the protective shell 1, making the oil layer form faster. When the liquid surface exceeds the highest point of the inclined surface of the baffle 5, it flows along the upper outer wall of the baffle 5 to the outlet pipe 6. One end of the outlet pipe 6 is connected to one end of the connecting pipe 12 through a pin. The other end of the connecting pipe 12 is connected to the feed pipe of the cyclone oil-water separator 11 through a pin. The petroleum oil-water mixture flows into the cyclone oil-water separator 11 through the connecting pipe 12.

[0021] Furthermore, the cyclone oil-water separator 11 includes a feed pipe, a cyclone chamber, a tail pipe, an overflow port, and a bottom outlet. Based on the characteristics of the density difference between oil and water, it uses the centrifugal force generated by the cyclone to separate oil and water. This part is well-known technology in the field and will not be described further.

[0022] The oil scraping device 8 includes an oil storage box 801. Multiple oil scraping grooves 802 are arranged around the outer wall of the oil storage box 801 along the axis. An oil scraping plate 803 is fixedly connected to the bottom of the inner wall of the oil scraping groove 802. An oil outlet 804 is opened on the bottom inner wall of the oil storage box 801. The oil outlet 804 is connected to one end of the oil drain pipe 9.

[0023] One end of the connecting shaft 7 is rotatably connected to the inner wall of the top of the protective shell 1. The output end of the second motor 10 passes through the protective shell 1 and is fixedly connected to one end of the connecting shaft 7. The other end of the connecting shaft 7 is fixedly connected to the outer wall of the top of the oil storage box 801.

[0024] Specifically, one end of the connecting shaft 7 is rotatably connected to the inner wall of the top of the protective shell 1. The output end of the second motor 10 passes through the protective shell 1 and is fixedly connected to the connecting shaft 7. The other end of the connecting shaft 7 is fixedly connected to the outer wall of the top of the oil storage box 801. The second motor 10 drives the connecting shaft 7 to rotate, and the oil storage box 801 rotates with the connecting shaft 7. Multiple oil scraping grooves 802 are arranged around the outer wall of the oil storage box 801 along the axis. Openings are opened at corresponding positions on the outer wall of the oil storage box 801 and the oil scraping grooves 802. Oil scraping plates 803 are fixedly connected to the inner wall of the bottom of each oil scraping groove 802. The cross-sectional shape is a right-angled triangle. The bottom inner wall of the oil scraper 802 is below the oil surface. When the oil storage box 801 rotates with the output end of the second motor 10, it drives the oil scraper 802 to rotate. The oil flows into the oil scraper 802 along the inclined surface of the oil scraper 803. The right-angled side of the oil scraper 803 can prevent the oil from flowing back. The oil flows into the oil storage box 801 from the opening of the oil scraper 802. The bottom inner wall of the oil storage box 801 is provided with an oil outlet 804. The oil outlet 804 is connected to the oil drain pipe 9. The oil flows from the oil outlet 804 into the oil drain pipe 9 and is discharged from the device along the oil drain pipe 9.

[0025] Furthermore, the motor selection is set according to needs. Both the first motor 4 and the second motor 10 are controlled by PLC. This part is well-known technology in the field and will not be elaborated further.

[0026] Working principle: When in use, first start the first motor 4 to drive the rotating shaft 202 to rotate, and the oil-water mixture flows into the pressure tank 201 from the liquid inlet pipe 3. The spiral blade 203 rotates at high speed to make the oil-water mixture evenly distributed. Then start the second motor 10 to make the oil scraping device 8 rotate. The oil scraping groove 802 scrapes over the oil surface, scrapes off a part of the oil floating on the top of the liquid surface and discharges it from the oil outlet pipe 9. When the liquid surface exceeds the highest point of the inclined surface of the baffle 5, it flows down along the outer wall of the inclined surface of the baffle 5 and flows into the cyclone oil-water separator 11 from the liquid outlet pipe 6 through the connecting pipe 12. Start the cyclone oil-water separator 11 to perform oil-water separation operation.

[0027] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A petrochemical oil-water separation device, comprising a protective shell (1), characterized in that, The protective shell (1) has a cavity. A water distribution device (2) is provided at the bottom of the cavity. One end of the water distribution device (2) is connected to an inlet pipe (3), which is connected to the inner wall of the protective shell (1). The other end of the water distribution device (2) is connected to a first motor (4), which is fixedly connected to the outer wall of the protective shell (1). A baffle (5) is fixedly connected in the middle of the cavity of the protective shell (1), and the baffle (5) is located above the water distribution device (2). A connecting shaft is connected to the top of the cavity of the protective shell (1). 7) One end of the connecting shaft (7) is connected to a second motor (10), which is fixedly connected to the top outer wall of the protective shell (1). The other end of the connecting shaft (7) is connected to an oil scraping device (8). The bottom of the oil scraping device (8) is connected to an oil drain pipe (9), which is connected to the inner wall of the protective shell (1). One side of the middle part of the protective shell (1) is connected to a liquid outlet pipe (6), one end of the liquid outlet pipe (6) is connected to a connecting pipe (12), and the other end of the connecting pipe (12) is connected to a cyclone oil-water separator (11).

2. The petrochemical oil-water separation equipment according to claim 1, characterized in that, The water distribution device (2) includes a pressure-resistant tank (201), one end of which is connected to an inlet pipe (3). Multiple water distribution grooves (204) are provided on the outer wall of the pressure-resistant tank (201). A rotating shaft (202) is provided inside the pressure-resistant tank (201). One end of the rotating shaft (202) is connected to a first motor (4). The output end of the first motor (4) passes through the protective shell (1) and is fixedly connected to one end of the rotating shaft. Spiral blades (203) are arranged around the outer wall of the rotating shaft (202).

3. The petrochemical oil-water separation equipment according to claim 2, characterized in that, The water distribution trough (204) is opened around the outer wall of the pressure-resistant barrel (201) along the axis. The circumferential angle of the water distribution trough (204) is 180 degrees. The output end of the first motor (4) passes through the protective shell (1) and is fixedly connected to one end of the rotating shaft (202).

4. The petrochemical oil-water separation equipment according to claim 1, characterized in that, The baffle (5) is inclinedly disposed in the middle of the cavity of the protective shell (1), and the angle between the inclined surface of the baffle (5) and the horizontal plane is 30 degrees.

5. A petrochemical oil-water separation device according to claim 1, characterized in that, The oil scraping device (8) includes an oil storage box (801). The outer wall of the oil storage box (801) is provided with a plurality of oil scraping grooves (802) along the axis. The bottom of the inner wall of the oil scraping groove (802) is fixedly connected to an oil scraping plate (803). The bottom inner wall of the oil storage box (801) is provided with an oil outlet (804). The oil outlet (804) is connected to one end of the oil drain pipe (9).

6. A petrochemical oil-water separation device according to claim 1, characterized in that, One end of the connecting shaft (7) is rotatably connected to the inner wall of the top of the protective shell (1), the output end of the second motor (10) passes through the protective shell (1) and is fixedly connected to one end of the connecting shaft (7), and the other end of the connecting shaft (7) is fixedly connected to the outer wall of the top of the oil storage box (801).

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