Buffering and flow stabilizing device and three-chamber separator

Abstract

The buffering and flow stabilizing device is installed on a water weir plate and arranged at the tail of a communicating pipe, the buffering and flow stabilizing device comprises a first annular plate and a second annular plate which are arranged in parallel, the first annular plate is installed on the water weir plate to define a buffering water tank, and the second annular plate is installed on the water weir plate to define a second annular plate; a liquid receiving tank is formed between the first annular plate and the second annular plate, the liquid receiving tank is communicated with a plurality of downcomers, the downcomers extend downwards and extend below the liquid level of the water chamber, and production water flows to the buffer water tank and the liquid receiving tank through the communicating pipe and enters below the liquid level of the water chamber through the downcomers. According to the buffering and flow stabilizing device, the stability of the liquid level of an outlet of the communicating pipe is guaranteed by arranging the buffering water tank, a liquid receiving structure outside the buffering water tank is matched with the liquid receiving tank, production water flowing out of the buffering water tank at the tail of the communicating pipe structure is received by the liquid receiving tank, the liquid receiving tank is communicated with the downcomer, and the liquid receiving tank and the downcomer form a set of devices communicated with the liquid receiving tank and a water chamber liquid phase. The device is used for preventing production water from directly falling into the liquid level of a water chamber to cause liquid level fluctuation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of separation and stabilization, and particularly relates to a buffer flow stabilizing device and a three-chamber separator. BACKGROUND

[0002] The gravity type oil-gas-water three-phase separator has been widely used as the main equipment in the offshore crude oil treatment process for many years due to its wide operability, stable treatment effect, low pressure drop, and less operation and maintenance workload.

[0003] The three-chamber separator needs to connect the water phase and the water chamber of the mixing chamber by using the principle of the communicating vessel. The conventional design is connected by a communicating pipe. In order to ensure that the tail end of the interface communicating pipe is much higher than the operating liquid level of the water chamber, the water phase after passing through the communicating pipe will fall to the liquid level of the water chamber, and the liquid level of the water chamber is unstable.

[0004] Therefore, it is urgent to design a buffer flow stabilizing device and a three-chamber separator to solve the above problems. SUMMARY

[0005] The main purpose of the present application is to overcome the above-mentioned shortcomings of the conventional technology, and to provide a buffer flow stabilizing device and a three-chamber separator which can not only stabilize the outlet liquid level of the communicating pipe, ensure the stability and accuracy of the oil-water interface height of the oil-water mixing chamber, and increase the stability of production operation and data accuracy, but also ensure the stability of the water chamber liquid level, prevent the destruction of the aggregation of the upper oil film of the water chamber liquid level, and control the liquid level height by using a novel structure.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the buffer flow stabilizing device and the three-chamber separator of the present application is as follows: A buffer flow stabilizing device is installed on a weir plate and arranged at the tail of a communicating pipe. The buffer flow stabilizing device comprises a first ring plate and a second ring plate arranged in parallel. The first ring plate is installed on the weir plate to form a buffer water tank. A liquid receiving groove is formed between the first ring plate and the second ring plate. The liquid receiving groove is communicated with a plurality of downcomers. The downcomers extend downward and extend into the lower part of the water chamber liquid level. The produced water flows to the buffer water tank, the liquid receiving groove, and the lower part of the water chamber liquid level through the communicating pipe and the downcomers.

[0007] Further, the buffer flow stabilizing device further comprises a bottom plate arranged between the first ring plate and the second ring plate. The first ring plate, the second ring plate, and the bottom plate can form the liquid receiving groove.

[0008] Further, a plurality of mounting holes are arranged on the bottom plate. Each downcomer is connected to the bottom plate through a corresponding mounting hole and communicated with the liquid receiving groove through the mounting hole.

[0009] Further, the side baffle of the liquid receiving groove is flush with the upper edge of the buffer water tank, and the bottom has an inclination angle of 5-10 degrees.

[0010] Further, the first ring plate is provided with an avoiding groove, and the production water in the buffer water tank enters the liquid receiving groove through the avoiding groove.

[0011] Further, the buffer flow stabilizing device further comprises an adjustable weir plate, which is arranged on the avoiding groove and can slide relative to the first ring plate to adjust the opening of the avoiding groove.

[0012] Further, the adjustable weir plate is of a segmented structure and comprises at least three adjustable height positions, and each height difference is 50-100 mm, and the quick adjustment is realized through bolts or a hydraulic mechanism.

[0013] Further, the number of downcomers is 4-16, which are arranged in a ring array.

[0014] Further, in the horizontal plane, the cross-sectional area of the buffer water tank is greater than that of the communication pipe.

[0015] A three-chamber separator comprises a communication pipe and the above-mentioned buffer flow stabilizing device, which is arranged at the tail of the communication pipe and is used for stabilizing the liquid level at the outlet of the communication pipe.

[0016] The buffer flow stabilizing device has the following advantages: the buffer flow stabilizing device guarantees the stability of the liquid level at the outlet of the communication pipe by arranging the buffer water tank, and the buffer water tank is matched with the liquid receiving structure outside the buffer water tank, the production water flowing out of the buffer water tank at the tail of the communication pipe structure is received by the liquid receiving groove, the liquid receiving groove is connected with the downcomer, and the two are a set of devices for connecting the liquid receiving groove and the water chamber liquid phase, which are used for preventing the production water from directly falling into the water chamber liquid surface to cause the liquid level fluctuation.

[0017] The three-chamber separator has the following advantages: the three-chamber separator not only can stabilize the liquid level at the outlet of the communication pipe, the stability and accuracy of the oil-water interface height of the oil-water mixing chamber, and increase the stability of the production operation and the data accuracy, but also can guarantee the stability of the water chamber liquid surface and prevent the destruction of the aggregation of the upper oil film of the water chamber liquid surface and the control of the liquid level height by the novel structure and arrangement, that is, the three-chamber separator is designed by multiple liquid level stabilization, that is, the buffer water tank and the liquid receiving groove, and is matched with the dynamic adjustment capacity, that is, the adjustable weir plate and the downcomer, so as to solve the problems of large liquid level fluctuation and inaccurate oil-water interface control in the traditional communication pipe design, and has high efficiency, flexibility and reliability, and has significant application value in the field of petroleum engineering. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the buffer flow stabilizing device. Figure 2Another perspective view of the buffer flow stabilizing device according to the present application; Figure 3 A perspective view of the buffer flow stabilizing device according to the present application installed in a three-chamber separator.

[0019] Marked description in the figure: 1, communication pipe; 2, buffer tank; 3, adjustable weir plate; 4, liquid receiving groove; 5, downcomer. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] Those skilled in the art can understand that although some embodiments herein include certain features rather than other features included in other embodiments, the combination of features of different embodiments means to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0022] The following refers to the accompanying Figure 1 to the accompanying Figure 3 A buffer flow stabilizing device and a three-chamber separator are described.

[0023] The present embodiment provides a buffer flow stabilizing device, Figure 1 A perspective view of the buffer flow stabilizing device according to the present application; Figure 2 Another perspective view of the buffer flow stabilizing device according to the present application; Figure 3 A perspective view of the buffer flow stabilizing device according to the present application installed in a three-chamber separator. Figures 1-3 As shown, the buffer flow stabilizing device is installed on the weir plate and arranged at the tail of the communication pipe 1. The buffer flow stabilizing device includes a first ring plate and a second ring plate arranged in parallel. The first ring plate is installed on the weir plate to form a buffer tank 2. A liquid receiving groove 4 is formed between the first ring plate and the second ring plate. The liquid receiving groove 4 is communicated with a plurality of downcomers 5. The downcomers 5 extend downward and extend into the lower part of the water chamber liquid surface. The production water flows through the communication pipe 1 to the buffer tank 2 and the liquid receiving groove 4, and then enters the lower part of the water chamber liquid surface through the downcomers 5.

[0024] The buffer flow stabilizing device ensures the stability of the liquid surface at the outlet of the communication pipe 1 by setting the buffer tank 2, and cooperates with the liquid receiving groove 4 as the liquid receiving structure outside the buffer tank 2. The production water flowing out of the buffer tank 2 at the tail of the communication pipe 1 structure is received by the liquid receiving groove 4, and the liquid receiving groove 4 is connected with the downcomer 5, which is a set of devices for connecting the liquid receiving groove 4 and the liquid phase in the water chamber, for preventing the production water from directly falling into the water chamber to cause liquid surface fluctuation.

[0025] Further, the buffer flow stabilizing device further comprises a bottom plate arranged between the first ring plate and the second ring plate, and the first ring plate, the second ring plate and the bottom plate can enclose the liquid receiving groove 4. The bottom plate and the ring plate enclose the closed liquid receiving groove 4 to prevent liquid leakage, and in addition, the bottom plate supports the ring plate structure to improve the overall anti-deformation ability of the device.

[0026] Further, a plurality of mounting holes are arranged on the bottom plate, and each downcomer 5 is connected to the bottom plate through a corresponding mounting hole and communicates with the liquid receiving groove 4 through the mounting hole. The downcomer 5 is quickly fixed through the mounting hole, which is convenient for disassembly and maintenance, and each downcomer 5 is independently connected to ensure uniform liquid distribution.

[0027] Further, as shown in Figures 1-3 , the upper edge of the side baffle of the liquid receiving groove 4 is flush with the upper edge of the buffer tank 2, and the bottom inclination angle is 5°-10°. The 5°-10° inclination angle promotes the natural flow of liquid and reduces the accumulation of sediments, so that the buffer flow stabilizing device itself has the functions of self-dredging and self-cleaning, and the upper edge of the side baffle is flush with the buffer tank 2 to ensure smooth transition of the liquid surface.

[0028] Further, the first ring plate is provided with an avoidance groove, and the production water in the buffer tank 2 enters the liquid receiving groove 4 through the avoidance groove. The avoidance groove serves as the only channel from the buffer tank 2 to the liquid receiving groove 4, so that the production water from the buffer tank 2 enters the liquid receiving groove 4 and then enters the lower part of the liquid surface through the downcomer 5, and at the same time, the opening of the buffer tank 2 itself is smaller than the opening of the buffer tank 2, so that it has the function of limiting the flow rate.

[0029] Further, as shown in Figures 1-3 , the buffer flow stabilizing device further comprises an adjustable weir plate 3 arranged on the avoidance groove, and the adjustable weir plate 3 can slide relative to the first ring plate to adjust the opening of the avoidance groove. The sliding weir plate can adjust the opening size of the avoidance groove in real time to adapt to different flow conditions, and in addition, the staff can adjust without stopping the machine, which improves the production continuity and has the advantage of convenient operation.

[0030] Further, the adjustable weir plate 3 is of a segmented structure, and contains at least three adjustable height levels, each with a height difference of 50-100 mm, and is quickly adjusted by a bolt or a hydraulic mechanism. The adjustable weir plate 3 is set to three or more height levels, each with a height of 50-100 mm, to meet the fine adjustment requirements of the device and realize accurate control of the device; the bolt / hydraulic mechanism realizes second-level adjustment, is suitable for sudden changes in flow, and realizes rapid response.

[0031] Further, as shown in Figure 2 and Figure 3 , the number of downcomers 5 is 4-16, arranged in a ring array. In order to avoid device downtime due to single-fault failure, multiple downcomers 5 are designed, so that the remaining downcomers 5 can still maintain operation in the case of single-fault failure. It can be understood that the 4-16 ring array downcomers 5 disperse the impact force of the liquid, avoid local vortex, and realize uniform distribution.

[0032] Further, in the horizontal plane, the cross-sectional area of the buffer tank 2 is greater than that of the communication pipe 1. The cross-sectional area of the buffer tank 2 is greater than that of the communication pipe 1, which reduces the kinetic energy of the liquid and reduces turbulence. In addition, the larger buffer tank 2 can adapt to the impact of peak flow and provide temporary storage space for production water.

[0033] The embodiment also provides a three-chamber separator, as shown in Figure 3 , the three-chamber separator includes a communication pipe 1 and the above-mentioned buffer flow stabilizing device, which is arranged at the tail of the communication pipe 1 and is used to stabilize the liquid level at the outlet of the communication pipe 1.

[0034] The three-chamber separator not only stabilizes the liquid level at the outlet of the communication pipe 1, the oil-water interface height in the oil-water mixing chamber, and increases the stability of production operation and data accuracy; moreover, through the new structure and setting, the water chamber liquid level is stabilized, the aggregation of the upper oil film of the water chamber liquid level is prevented, and the liquid level height is controlled. That is, the three-chamber separator solves the problems of large liquid level fluctuation and inaccurate oil-water interface control in the traditional communication pipe 1 design through multi-stage liquid level stabilization design, i.e., the buffer tank 2 and the liquid receiving groove 4, and dynamic adjustment capability, i.e., the adjustable weir plate 3 and the downcomer 5, and has high efficiency, flexibility and reliability, and has significant application value in the field of petroleum engineering.

[0035] The skilled in the art can understand that: the treated water phase enters the buffer water tank 2 as a buffer structure through the communicating pipe 1, and the stability of the liquid surface of the outlet of the communicating pipe 1 is ensured through a certain height and an enlarged cross-sectional area, so that the stability and accuracy of the oil-water interface of the mixing chamber are ensured; the height of the adjustable weir plate 3 is adjusted to adjust the operating height of the oil-water interface of the oil-water three-phase separation oil-water mixing chamber; the water phase overflowed from the buffer water tank 2 enters the liquid receiving tank 4, so that the water phase is prevented from directly falling into the water chamber liquid surface to cause liquid surface fluctuation, and the water phase of the liquid receiving tank 4 flows out below the water chamber liquid surface after being distributed by the liquid downpipe 5. The whole device not only can stabilize the stability of the liquid surface of the outlet of the communicating pipe 1, ensure the stability and accuracy of the oil-water interface height of the oil-water mixing chamber, increase the stability of production operation and the accuracy of data, but also can ensure the stability of the water chamber liquid surface through the novel structure and setting, and prevent the aggregation of the upper oil film of the water chamber liquid surface and the control of the liquid surface height from being damaged.

[0036] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can be made by the ordinary skilled in the art. All the implementation modes do not need to be exhausted here. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A buffering and stabilizing flow device, installed on the water weir plate and arranged at the tail end of the connecting pipe, characterized in that: The buffering and stabilizing flow device includes a first ring plate and a second ring plate arranged in parallel. The first ring plate is installed on the water weir plate to form a buffer water trough. A liquid receiving trough is formed between the first ring plate and the second ring plate. The liquid receiving trough is connected to a plurality of downcomers. The downcomers extend downward and extend below the liquid level of the water chamber. The production water flows to the buffer water trough and the liquid receiving trough through the connecting pipe, and enters below the liquid level of the water chamber through the downcomers.

2. The buffering and stabilizing flow device according to claim 1, characterized in that: The buffering and stabilizing flow device further comprises a bottom plate, which is arranged between the first ring plate and the second ring plate. The first ring plate, the second ring plate and the bottom plate can form a liquid receiving groove.

3. The buffering and stabilizing flow device according to claim 2, characterized in that: A plurality of mounting holes are provided on the bottom plate, and each downcomer is connected to the bottom plate through a corresponding mounting hole and is communicated with the liquid receiving trough through the mounting hole.

4. The buffering and stabilizing flow device according to claim 2, characterized in that: The upper edge of the side baffle of the liquid receiving tank is flush with the upper edge of the buffer water tank, and the bottom is inclined at an angle of 5°-10°.

5. The buffering and stabilizing flow device according to claim 1, characterized in that: The first ring plate is provided with an avoidance groove, and the production water in the buffer water tank enters the liquid receiving tank through the avoidance groove.

6. The buffering and stabilizing flow device according to claim 5, characterized in that: The buffering and stabilizing flow device also includes an adjustable weir plate, which is arranged on the avoidance groove and can slide relative to the first ring plate to adjust the opening of the avoidance groove.

7. The buffering and stabilizing flow device according to claim 6, characterized in that: The adjustable weir plate is a segmented structure with at least 3 adjustable height levels, each with a height difference of 50mm-100mm, which can be quickly adjusted through bolts or hydraulic mechanisms.

8. The buffering and stabilizing flow device according to claim 1, characterized in that: The number of downcomers ranges from 4 to 16 and is distributed in a circular array.

9. The buffering and stabilizing flow device according to claim 1, characterized in that: On the horizontal plane, the cross-sectional area of ​​the buffer water tank is larger than the cross-sectional area of ​​the connecting pipe.

10. A three-chamber separator, characterized in that: It comprises a connecting pipe and a buffering and stabilizing flow device as described in any one of claims 1 to 9, wherein the buffering and stabilizing flow device is arranged at the tail of the connecting pipe to stabilize the liquid level at the outlet of the connecting pipe.

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