Crude oil pre-dehydration and sewage oil removal integrated device and use method thereof

Abstract

The crude oil pre-dehydration and sewage oil removal integrated device comprises an upper shell, the upper shell is of a hollow cylindrical structure with an opening in the lower surface, the lower end of the upper shell is fixedly connected with a lower shell, and the lower shell is of a vertically-through hopper-shaped structure; a liquid inlet pipe is fixedly installed on the side surface of the upper shell, an overflow pipe is arranged on the upper surface of the upper shell in a penetrating mode, and the lower end of the overflow pipe is inserted into the upper shell. According to the crude oil pre-dehydration and sewage oil removal integrated device, the separation shell composed of the upper shell body and the lower shell body is arranged, rotational flow is generated in the process that fluid tangentially enters the upper shell body and the lower shell body, the oil-water separation process is achieved through centrifugal force in the rotational flow process, and the liquid inlet pipe arranged on the surface of the upper shell body is large in inlet and small in outlet; in the fluid entering process, the flow speed of the fluid at the gradually-reduced outlet of the liquid inlet pipe is increased, the rotational flow speed of the fluid is increased, and the separation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crude oil exploitation, and in particular to an integrated device for crude oil pre-dehydration and sewage oil removal and a method for using the device. Background Art

[0002] Oil is an important energy source. The extracted crude oil needs to be pre-dehydrated before subsequent crude oil processing. In the process of crude oil extraction, a large amount of wastewater will be generated. The wastewater generated in the process of crude oil extraction carries crude oil. In the process of sewage treatment, the sewage also needs to be deoiled.

[0003] At present, in the process of crude oil extraction, two sets of equipment are set up to carry out crude oil dehydration and wastewater oil removal respectively, which increases the floor space of the processing equipment in the process of crude oil extraction. In addition, the separately set equipment is not conducive to the centralized collection process of crude oil, affecting the efficiency of crude oil pre-dehydration. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated crude oil pre-dehydration and sewage oil removal device, which is equipped with two parallel processing devices to separate oil and water from crude oil and sewage respectively, and collect them centrally to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an integrated crude oil pre-dehydration and wastewater oil removal device, comprising an upper shell, the upper shell is a hollow cylindrical structure with an open lower surface, the lower end of the upper shell is fixedly connected to the lower shell, the lower shell is a bucket-shaped structure that penetrates from top to bottom, a liquid inlet pipe is fixedly installed on the side surface of the upper shell, an overflow pipe is penetrated through the upper surface of the upper shell, the lower end of the overflow pipe is inserted into the interior of the upper shell, the upper shell, the lower shell, the liquid inlet pipe and the overflow pipe together constitute a separation structure, two separation structures are arranged in parallel, the two separation structures are exactly the same, and the liquid inlet pipe is a bucket-shaped pipe with a large inlet and a small outlet.

[0006] Preferably, the upper ends of the two overflow pipes are connected by a connecting pipe, and the lower end openings of the two lower shells are connected by another connecting pipe. A delivery pipe is provided through the surface of the upper connecting pipe, and the delivery pipe is an L-shaped structure. A guide structure is provided inside the delivery pipe, and the guide structure can achieve buffering and diversion of the internal fluid, thereby reducing the impact force of the fluid on the inner wall of the delivery pipe.

[0007] By adopting the above technical solution, the guide plate can be used to buffer and guide the fluid, thereby reducing the impact force of the fluid on the inner wall of the conveying pipe.

[0008] Preferably, the guide structure includes a guide plate, which is a bucket-shaped structure that penetrates from top to bottom. The outer surface of the guide plate is fixedly mounted on the inner wall of the conveying pipe, and a plurality of guide plates are arranged in parallel on the inner wall of the conveying pipe.

[0009] By adopting the above technical solution, the guide plate can be used to buffer and guide the fluid.

[0010] Preferably, a filtering structure is arranged below the two separation structures, and the filtering structure can further filter the separated fluid.

[0011] By adopting the above technical solution, the separated fluid can be further filtered using the filtering structure.

[0012] Preferably, the filtering structure includes a box body, which is arranged below the two separation structures, a bracket is arranged on the upper surface of the box body and fixedly connected to the outer surface of the lower shell body, a partition plate is fixedly connected to the inner wall of the box body, and the partition plate divides the interior of the box body into two chambers, and a No. 1 liquid outlet pipe and a No. 2 liquid outlet pipe are respectively penetrated by the two side surfaces of the box body, and valves are arranged inside the No. 1 liquid outlet pipe and the No. 2 liquid outlet pipe to control opening and closing, and the No. 1 liquid outlet pipe and the No. 2 liquid outlet pipe are respectively inserted into the two chambers inside the box body, and pipes are respectively arranged on the corresponding upper surfaces of the two chambers of the box body to be connected with the connecting pipe and the delivery pipe below, the No. 1 liquid outlet pipe and the delivery pipe are located in the same chamber, and the No. 2 liquid outlet pipe and the connecting pipe below are located in the same chamber.

[0013] By adopting the above technical solution, the fluid can be further filtered using the filter plate arranged in the box.

[0014] Preferably, filter plates of the same structure are arranged in the two chambers of the box, the cross-section of the filter plate is a trapezoidal structure with an open bottom, and two filter plates are symmetrically arranged above and below, with the bottom edge of the upper filter plate facing upward and the bottom edge of the lower filter plate facing downward.

[0015] By adopting the above technical solution, sufficient filtration of the fluid can be achieved by using two symmetrically arranged filter plates.

[0016] Compared with the prior art, the invention has the following beneficial effects: the crude oil pre-dehydration and sewage oil removal integrated device: 1. The device is provided with a separation shell composed of an upper shell and a lower shell, and utilizes the swirl generated in the process of the fluid tangentially entering the upper shell and the lower shell, and utilizes the centrifugal force in the swirl process to achieve the oil-water separation process, and the inlet of the liquid inlet pipe arranged on the surface of the upper shell has a large inlet and a small outlet. During the process of the fluid entering, the flow velocity at the outlet of the gradually shrinking liquid inlet pipe increases, thereby increasing the swirl velocity of the fluid and improving the separation efficiency; 2. The device is equipped with two separation structures to separate crude oil and sewage respectively. The two separation structures are connected by a connecting pipe, so that the device can simultaneously perform the dehydration process of crude oil and the deoiling process of sewage. The separated oil and water can be collected in the box by the connecting pipe. The crude oil dehydration and sewage deoiling are integrated, which reduces the footprint of the device. 3. The device is provided with a box body below the separation structure, and symmetrical filter plates are provided in the box body to further filter the separated fluid. The filter plates are provided with an open trapezoidal structure, and the reversely arranged trapezoidal structure can be used to fully guide and filter the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the external structure of the present invention; Figure 2 It is a schematic diagram of the front cross-section structure of the box body of the present invention; Figure 3 It is a schematic diagram of the front cross-section structure of the delivery pipe of the present invention; Figure 4 It is a schematic diagram of the front cross-section structure of the upper shell and the lower shell of the present invention; Figure 5 It is a schematic diagram of the top cross-sectional structure of the upper shell and the liquid inlet pipe of the present invention.

[0018] In the figure: 1. upper shell; 2. lower shell; 3. liquid inlet pipe; 4. overflow pipe; 5. connecting pipe; 6. delivery pipe; 7. guide plate; 8. box body; 9. partition plate; 10. liquid outlet pipe No. 1; 11. liquid outlet pipe No. 2; 12. filter plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 5 The present invention provides a technical solution: an integrated device for crude oil pre-dehydration and wastewater oil removal, including an upper shell 1, a lower shell 2, a liquid inlet pipe 3, an overflow pipe 4, a connecting pipe 5, a delivery pipe 6, a guide plate 7, a box 8, a partition plate 9, a No. 1 liquid outlet pipe 10, a No. 2 liquid outlet pipe 11, and a filter plate 12.

[0021] The upper shell 1 is a hollow cylindrical structure with an open lower surface. The lower end of the upper shell 1 is fixedly connected to the lower shell 2. The lower shell 2 is a bucket-shaped structure that penetrates from top to bottom. A liquid inlet pipe 3 is fixedly installed on the side surface of the upper shell 1. An overflow pipe 4 is provided through the upper surface of the upper shell 1. The lower end of the overflow pipe 4 is inserted into the interior of the upper shell 1. The upper shell 1, the lower shell 2, the liquid inlet pipe 3 and the overflow pipe 4 together constitute a separation structure. There are two separation structures arranged in parallel. The two separation structures are exactly the same. The liquid inlet pipe 3 is a bucket-shaped pipe with a large inlet and a small outlet. The two overflow pipes 4 are The upper ends are connected by a connecting pipe 5, and the lower end openings of the two lower shells 2 are connected by another connecting pipe 5. A delivery pipe 6 is provided through the surface of the upper connecting pipe 5. The delivery pipe 6 is an L-shaped structure. A guide structure is provided inside the delivery pipe 6. The guide structure can achieve buffering and guide flow of the internal fluid, and reduce the impact force of the fluid on the inner wall of the delivery pipe 6. The guide structure includes a guide plate 7. The guide plate 7 is a bucket-shaped structure that penetrates from top to bottom. The outer surface of the guide plate 7 is fixedly installed on the inner wall of the delivery pipe 6. A plurality of guide plates 7 are provided in parallel on the inner wall of the delivery pipe 6; like Figure 1 ,like Figure 3 , Figure 4 and Figure 5 As shown, when the device is used to process crude oil and sewage in an integrated manner, the crude oil pipeline is connected to one of the liquid inlet pipes 3, and the sewage is connected to the other liquid inlet pipe 3. The crude oil and sewage undergo the same movement process in the separation structures on both sides. The fluid enters from the liquid inlet pipe 3, and under the action of the bucket-shaped pipe with a large inlet and a small outlet, the fluid enters the upper shell 1 at a higher flow rate, and under the action of the tangentially arranged liquid inlet pipe 3, a vortex is formed inside the upper shell 1. Under the centrifugal force of the vortex, the oil and water in the fluid are separated, and the oil flows out from the overflow pipe 4 above, enters the upper connecting pipe 5, and enters the delivery pipe 6 along the upper connecting pipe 5. Under the guidance of the guide plate 7 inside the delivery pipe 6, the flow rate is slowed down and flows downward, reducing the impact force of the fluid on the inner wall of the delivery pipe 6, and the water flows out from the lower end of the bucket-shaped lower shell 2 and flows into the connecting pipe 5 below.

[0022] A filtering structure is arranged below the two separation structures, and the filtering structure can further filter the separated fluid. The filtering structure includes a box body 8, which is arranged below the two separation structures. A bracket is arranged on the upper surface of the box body 8 and is fixedly connected to the outer surface of the lower shell body 2. A partition plate 9 is fixedly connected to the inner wall of the box body 8. The partition plate 9 divides the interior of the box body 8 into two chambers. A No. 1 liquid outlet pipe 10 and a No. 2 liquid outlet pipe 11 are respectively penetrated on both side surfaces of the box body 8. Valves are arranged inside the No. 1 liquid outlet pipe 10 and the No. 2 liquid outlet pipe 11 to control opening and closing. The No. 1 liquid outlet pipe 10 and the No. 2 liquid outlet pipe 11 are controlled by valves. The pipe 10 and the second liquid outlet pipe 11 are respectively inserted into the two chambers inside the box body 8. The upper surfaces corresponding to the two chambers of the box body 8 are respectively provided with pipes connected to the connecting pipe 5 and the delivery pipe 6 below. The first liquid outlet pipe 10 and the delivery pipe 6 are located in the same chamber, and the second liquid outlet pipe 11 and the connecting pipe 5 below are located in the same chamber. The two chambers of the box body 8 are provided with filter plates 12 of the same structure. The cross section of the filter plate 12 is a trapezoidal structure with an open bottom edge. There are two filter plates 12 symmetrically arranged above and below, the bottom edge of the upper filter plate 12 faces upward, and the bottom edge of the lower filter plate 12 faces downward; like Figure 1 and Figure 2 As shown, after the oil and water in the fluid are separated, the oil enters a chamber of the box body 8 through the delivery pipe 6, and the water enters another chamber of the box body 8 from the connecting pipe 5 below. After the fluid enters the chamber of the box body 8, the fluid falls downward to the filter plate 12 above. Under the action of the trapezoidal filter plate 12, the fluid is filtered once on the surface of the filter plate 12, and the fluid that has been filtered once continues to flow downward to the surface of the filter plate 12 below, and flows on the surface of the filter plate 12 set in the opposite direction, and performs a secondary filtration process, so as to filter the separated fluid again for subsequent processing, and the oil is discharged from the No. 1 liquid outlet pipe 10, and the water is discharged from the No. 2 liquid outlet pipe 11.

[0023] Working principle: When using the integrated crude oil pre-dehydration and sewage oil removal device, the two liquid inlet pipes 3 of the device are connected to the crude oil and sewage respectively, so that the fluid enters from the liquid inlet pipe 3, and under the action of the upper shell 1 and the lower shell 2, the fluid swirls. Under the action of centrifugal force, the oil and water in the fluid are separated, and the oil flows out from the overflow pipe 4 above, and the water flows out from the lower end of the bucket-shaped lower shell 2. The oil enters the box body 8 through the delivery pipe 6, and the water enters the other chamber of the box body 8 from the connecting pipe 5. Under the action of the filter plate 12 inside the box body 8, the fluid is filtered on the surface of the filter plate 12, so that the separated fluid is filtered again, which is convenient for subsequent processing and increases the overall practicality.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated crude oil pre-dehydration and wastewater oil removal device, comprising an upper shell (1), the upper shell (1) being a hollow cylindrical structure with an open lower surface, the lower end of the upper shell (1) being fixedly connected to a lower shell (2), the lower shell (2) being a bucket-shaped structure that penetrates from top to bottom, a liquid inlet pipe (3) being fixedly mounted on the side surface of the upper shell (1), an overflow pipe (4) being provided through the upper surface of the upper shell (1), the lower end of the overflow pipe (4) being inserted into the interior of the upper shell (1), the upper shell (1), the lower shell (2), the liquid inlet pipe (3) and the overflow pipe (4) together forming a separation structure, characterized in that: Two separation structures are arranged in parallel, and the two separation structures have exactly the same composition. The liquid inlet pipe (3) is a bucket-shaped pipe with a large inlet and a small outlet.

2. The integrated crude oil pre-dehydration and wastewater oil removal device according to claim 1 is characterized by: The upper ends of the two overflow pipes (4) are connected via a connecting pipe (5), and the lower end openings of the two lower shells (2) are connected via another connecting pipe (5). A delivery pipe (6) is provided through the surface of the upper connecting pipe (5). The delivery pipe (6) is an L-shaped structure. A flow guide structure is provided inside the delivery pipe (6). The flow guide structure can achieve buffering and flow guide of the internal fluid, thereby reducing the impact of the fluid on the inner wall of the delivery pipe (6).

3. The integrated crude oil pre-dehydration and wastewater oil removal device according to claim 2 is characterized in that: The flow guide structure comprises a flow guide plate (7), the flow guide plate (7) being a bucket-shaped structure penetrating from top to bottom, the outer surface of the flow guide plate (7) being fixedly mounted on the inner wall of the conveying pipe (6), and a plurality of the flow guide plates (7) being arranged in parallel on the inner wall of the conveying pipe (6) from top to bottom.

4. The integrated crude oil pre-dehydration and wastewater oil removal device according to claim 1 is characterized by: A filtering structure is arranged below the two separation structures, and the filtering structure can further filter the separated fluid.

5. The integrated crude oil pre-dehydration and wastewater oil removal device according to claim 4 is characterized by: The filtering structure comprises a box (8), which is arranged below the two separation structures. A bracket is arranged on the upper surface of the box (8) and is fixedly connected to the outer surface of the lower shell (2). A partition plate (9) is fixedly connected to the inner wall of the box (8). The partition plate (9) divides the interior of the box (8) into two chambers. A first liquid outlet pipe (10) and a second liquid outlet pipe (11) are respectively penetrated through the two side surfaces of the box (8). Valves are arranged inside the first liquid outlet pipe (10) and the second liquid outlet pipe (11) to control opening and closing. The first liquid outlet pipe (10) and the second liquid outlet pipe (11) are respectively inserted into the two chambers inside the box (8). Pipes are respectively arranged on the upper surfaces corresponding to the two chambers of the box (8) and are connected to the connecting pipe (5) and the delivery pipe (6) below. The first liquid outlet pipe (10) and the delivery pipe (6) are located in the same chamber, and the second liquid outlet pipe (11) and the connecting pipe (5) below are located in the same chamber.

6. The integrated crude oil pre-dehydration and wastewater oil removal device according to claim 5, characterized in that: Filter plates (12) of the same structure are arranged in the two chambers of the box body (8); the cross section of the filter plate (12) is a trapezoidal structure with an open bottom edge; two filter plates (12) are symmetrically arranged in the upper and lower parts; the bottom edge of the upper filter plate (12) faces upwards, and the bottom edge of the lower filter plate (12) faces downwards.

7. The integrated crude oil pre-dehydration and wastewater oil removal device according to claim 1 is characterized in that In: The method of use is to connect the crude oil pipeline to one of the liquid inlet pipes (3), and to connect the sewage to the other liquid inlet pipe (3). The crude oil and the sewage undergo the same movement process in the separation structures on both sides. The fluid enters from the liquid inlet pipe (3). Under the action of the bucket-shaped pipe with a large inlet and a small outlet, the fluid enters the upper shell (1) at a higher flow rate. Under the action of the tangentially arranged liquid inlet pipe (3), a vortex is formed inside the upper shell (1). Under the centrifugal force of the vortex, the oil and water in the fluid are separated. The oil flows out from the upper overflow pipe (4) and enters the upper connecting pipe (5). It enters the delivery pipe (6) along the upper connecting pipe (5). Under the guidance of the guide plate (7) inside the delivery pipe (6), the flow rate is slowed down and the fluid flows downward, reducing the impact force of the fluid on the inner wall of the delivery pipe (6). The water flows out from the lower end of the bucket-shaped lower shell (2) and flows into the lower connecting pipe (5). A filtering structure is arranged below the two separation structures, and the filtering structure can further filter the separated fluid. The filtering structure comprises a box body (8), and the box body (8) is arranged below the two separation structures. A bracket is arranged on the upper surface of the box body (8) and is fixedly connected to the outer surface of the lower shell body (2). A partition plate (9) is fixedly connected to the inner wall of the box body (8), and the partition plate (9) divides the interior of the box body (8) into two chambers. A first liquid outlet pipe (10) and a second liquid outlet pipe (11) are respectively penetrated by the two side surfaces of the box body (8). Valves are arranged inside the first liquid outlet pipe (10) and the second liquid outlet pipe (11) to control opening and closing. The first liquid outlet pipe (10) and the second liquid outlet pipe (11) are connected to the inner wall of the box body (8). The first and second liquid outlet pipes (10, 11) are respectively inserted into two chambers inside the box body (8); the upper surfaces corresponding to the two chambers of the box body (8) are respectively provided with pipes connected to the connecting pipe (5) and the delivery pipe (6) below; the first liquid outlet pipe (10) and the delivery pipe (6) are located in the same chamber; the second liquid outlet pipe (11) and the connecting pipe (5) below are located in the same chamber; filter plates (12) of the same structure are arranged in the two chambers of the box body (8); the cross section of the filter plate (12) is a trapezoidal structure with an open bottom edge; two filter plates (12) are symmetrically arranged above and below; the bottom edge of the upper filter plate (12) faces upward, and the bottom edge of the lower filter plate (12) faces downward; After the oil and water in the fluid are separated, the oil enters a chamber of the box (8) through the delivery pipe (6), while the water enters another chamber of the box (8) from the lower connecting pipe (5). After the fluid enters the chamber of the box (8), the fluid falls downward to the filter plate (12) above. Under the action of the trapezoidal filter plate (12), the fluid is filtered once on the surface of the filter plate (12). The fluid that has been filtered once continues to flow downward to the surface of the filter plate (12) below, and flows on the surface of the filter plate (12) arranged in the opposite direction to perform a secondary filtering process, thereby filtering the separated fluid again to facilitate subsequent processing. The oil is discharged from the first liquid outlet pipe (10), and the water is discharged from the second liquid outlet pipe (11).

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