CN201101907Y - Combined oil water separation device - Google Patents

Abstract

The utility model relates to a composite oil-water separation device used in land processing stations and offshore oil production platforms, which includes the inlet and outlet of the flow divider respectively communicated with the horizontal main liquid inlet pipe, the vertical pipe and the lower horizontal pipe; the vertical pipe It communicates with the elbow; the lower horizontal pipe is connected to the input port of the spiral pipe, and the spiral pipe is connected to the fourth separation box, which communicates with the second settling separation box, and its top is connected to the top of the fourth settling separation box through the middle pipe Connected; Install a horizontal drain pipe on the bottom outlet of the side wall corresponding to the entrance of the fourth settling separation box and install a horizontal oil drain pipe on the top. One end of the horizontal oil drain pipe penetrates from the bottom of the third settling separation box, and the other port is connected to The bottom outlet of the third settling separation box is fixed; the upper horizontal pipe communicates with the first spiral pipe, and the other outlet of the first spiral pipe is connected to the third settling separation box, the bottom and top sides of the first and third settling separation boxes Pipelines are connected between the walls; water outlet pipes and oil outlet pipes are respectively installed on the two horizontal drain pipes through tees.

Description

A composite oil-water separation device

technical field

The utility model relates to a device and method for separating oil-water two-phase mixed liquid, in particular to a composite oil-water separation device, separation system and method applied to land and sea oil production platforms.

Background technique

In many industries, such as petrochemical enterprises, oil-water separation equipment is an important production equipment. Separation technology is crucial to the development of the industry.

The separation principles currently used are: gravity, centrifugation, filtration, electrostatic, demulsification, etc. The initial separation equipment generally adopts one separation principle for oil-water separation. In recent years, the combination of multiple separation principles for separation equipment is the development direction. For example, the patent publication number: CN2569538Y, a high-efficiency oil-water separator, describes a separation device that mainly adopts the principle of gravity separation; the invention patent of the Ecological Research Center of the Chinese Academy of Sciences - a spiral channel membrane oil-water separation device (patent publication number: CN1299693. A), adopt the centrifugal principle and membrane technology to combine and separate the equipment and method.

In actual production, it is often necessary to quickly separate a large amount of oil-water mixture. Gravity principle and membrane technology are effective separation techniques, but the processing speed is slow, which leads to complex structure and bulky equipment.

Contents of the invention

The purpose of this utility model is to solve the above oil-water separation device adopting a single separation principle. When the parameters of the incoming liquid change during the separation process, the processing efficiency is significantly reduced. Combining the separation principle, the splitter, the sedimentation separation box and the sedimentation separation box designed with a spiral tube are combined to form a composite oil-water separation device through pipelines. This system improves separation efficiency and has a large processing capacity; it has a simple structure , an effective way to reduce the weight of the separator, which is suitable for both onshore oilfields and offshore oilfields.

The purpose of this utility model is achieved in that:

The composite oil-water separation device provided by the utility model, as shown in Figure 4, the system includes a first flow divider 10, a settling separation tank and connecting pipelines; it is characterized in that the liquid inlet 11 and the upper liquid outlet 12 of the flow divider and the lower liquid outlet 13 communicate with the horizontal total liquid inlet pipe 21, the vertical pipe 22 and the lower horizontal pipe 23 respectively; the vertical pipe 22 communicates with the elbow 31 and the upper horizontal pipe 24 in sequence; Between the upper horizontal pipes 24, three parallel vertical pipes 22 are connected in parallel; the lower horizontal pipe 23 is connected to the input port of the second spiral pipe 502 installed in the second settling separation box 602, and the second spiral pipe The output port of 502 is connected to the fourth separation box 604 through the outlet pipe 552, the bottom of the second settling separation box 602 communicates with the bottom of the fourth settling separation box 604 through an intermediate pipe 802, and its top passes through an intermediate pipe 802. The pipe 804 communicates with the top of the fourth settling separation box 604; a horizontal drain pipe 27 is installed on the outlet of the fourth settling separation box body 604 corresponding to the side wall bottom of the inlet, and a horizontal oil drain pipe 28 is installed in the middle, and the horizontal oil drain pipe 28 The other end penetrates from the middle of the third settling and separating box 603, and the other port of the horizontal drain pipe 27 is fixed to the outlet at the bottom of the third settling and separating box 603; the end port of the upper horizontal pipe 24 is connected to the delivery pipeline 26 , the delivery line 26 communicates with the input port of the first spiral tube 501 in the first settling separation box 601, and the first spiral tube 501 is installed in the settling separation box 601; the other outlet of the first spiral tube 501 passes through the liquid outlet The pipe 551 is connected to the third settling separation box 603, and the first pipeline 801 and the second pipeline 803 are connected between the bottom and the top side wall of the first settling separation box 601 and the third settling separation box 603; The third settling separation box body 603 and the corresponding side wall bottom outlet of the entrance are communicated with another port of the horizontal drain pipe 27; The overflow port in the tank is 150-300 mm, and the height of the horizontal drain pipe 27 is 100 mm higher than the bottom of the tank body; the water outlet pipe 81 and the oil outlet pipe 82 are respectively installed on the horizontal drain pipe 27 and the horizontal oil drain pipe 28 through a tee as the water outlet and oil outlet.

In the above technical solution, a second flow divider 20 is also included, the end port of the upper horizontal pipe 24 communicates with one port of the second flow divider 20, and the other two ports of the second flow divider 20 are respectively connected to the oil delivery pipe 25 and delivery pipeline 26, the oil delivery pipeline 25 communicates with the third settling separation box 603. By connecting the second flow divider, the oil-water layer can be strengthened, and the oil with low water content can be separated more finely.

In the above technical solution, the flow divider includes a body, the body is a pressure-resistant container with a three-way pipe structure, the left nozzle 11 of the three-way pipe is a liquid inlet, and the right side of the three-way pipe The nozzle 13 is the lower liquid outlet, and the upper nozzle 12 of the tee is the pressure-resistant container of the upper liquid outlet. There is a horizontally arranged shunt partition 16 in the cavity inside it, and the shunt partition divides the cavity. Divided into upper and lower spaces, the upper space 14 communicates with the upper liquid outlet 12, the lower space 15 communicates with the lower liquid outlet 13, and both spaces communicate with the liquid inlet 11. The diameters of the incoming liquid pipes connected to the liquid ports are equal; the said splitter plate is located above the end of the nozzle on the right side of the three-way pipe, and there is a plug 161 which closes the upper part of the nozzle; the plug faces the end of the liquid inlet. The longitudinal section of the body is parabolic; the ratio of the height H from the central axis of the body to the upper liquid outlet to the radius r of the diverter inner cavity is less than 5; there are at least two groups of different heights on the inner cavity wall of the body, and A bar-shaped groove that can cooperate with the two sides of the divider baffle; and the ratio of the length L from the liquid inlet to the horizontal liquid outlet of the body to the radius r of the inner cavity of the diverter is less than 10, and each of the body The nozzles are provided with connecting flanges; refer to Figure 1A and Figure 1B.

In the above technical solution, the end of the flow divider of the flow divider is flush with the end of the liquid inlet.

In the above-mentioned technical solution, three valves are also included, the first valve 41 is installed on the upper port of the vertical pipe 22, the other port of the valve 41 is connected to the bottom port 31 of the 90-degree elbow, and the elbow is connected to the upper horizontal pipe. 24 connection; the remaining two valves are installed in the other two vertical pipes 22 respectively.

In the above technical solution, the diameter d of the vertical pipe is smaller than the diameter D of the horizontal pipe, the length H of the vertical pipe is 15 times the diameter d of the vertical pipe, and the distance S between adjacent vertical pipes is greater than 30 times the diameter D of the horizontal pipe.

In the above technical solution, the spiral tube includes a spiral tube main body 500 as a vertical structure, the spiral tube main body 500 is fixed on the bracket 90 of the spiral tube main body, and the spiral tube input pipe 51 of the spiral tube main body 500 is installed at one port Input pipe valve 42, spiral pipe input pipe 55-port installation output pipe valve 43; Total number of turns is N, N==4-30; The spiral pipe upper part of spiral pipe main body 500 has 4 circles to be band hole section 54, belt Below the hole section is a closed section 52, and a circular hole 70 is opened on each circle of the section with a hole. The circular hole 70 starts to open from the 1/4 circumference of the outlet of the output pipe 55, and the circular holes 70 are evenly opened. On the outside of the helical tube, at the position of α=45° angle with the horizontal line, there is no round hole on the helical tube that is spaced half a circle between the round holes 70 on the adjacent two circles of the helical tube; the helical tube section without holes is The adjustment section, the length of the adjustment section is 1/2 circle; the spiral pipe section is half a turn away from the round hole 70 opened in the second round of spiral pipe and the round hole 70 opened in the third round.

In the above technical solution, the radius of gyration of the spiral tube of the spiral tube body 500 is R, the pitch is H, the inner diameter of the tube is D ₁ , and the outer diameter of the tube is D ₂ , and its design parameters follow the following relationship: $450\≤\frac{2\mathrm{\πR}(N-4)}{{\mathrm{D.}}_1}\≤500,$ $2\≤\frac{h}{{\mathrm{D.}}_2}\≤2.5;$ Among them, the values of R, D ₁ and D ₂ are most suitable in the following ranges: 150mm≤R≤200mm, 20mm≤D ₁ ≤30mm, 25mm≤D ₂ ≤35mm.

In the above technical solution, the numbers of the 4 circles of holed sections 54 on the spiral tube of the spiral tube main body 500 are n ₁ , n ₂ , n ₃ respectively from top to bottom of the spiral tube, The apertures are d ₁ , d ₂ , and d ₃ respectively; the number and aperture of circular holes should follow the following design criteria: n ₁ ≤n ₂ ≤n ₃ , d ₁ ≤d ₂ ≤d ₃ .

In the above technical solution, the settling separation box of the present invention is a circular or square metal container with a diameter greater than or equal to 1000mm and a height greater than or equal to 1200mm; it also includes a vertical partition between the first and second settling boxes The two side walls of the vertical partition are fixed on the two side walls of the settling separation box, which divides the container into two parts, the bottom is connected, and the upper gap is the overflow port. On the side, the function of the vertical partition is to reduce the disturbance of the incoming liquid on the settlement and separation, the water can flow in the lower part of the partition, and the oil enters from one side to the other through the overflow port. The end of the partition is flush with the end of the liquid inlet.

The utility model has the advantages of:

The oil-water separation system of the utility model using the combined principle of centrifugation, gravity and expansion adopts combined separation components, including T-shaped pipes, flow dividers, spiral pipes, and gravity settlement separation boxes. The components of each part can be combined and adjusted conveniently. to achieve the best separation state.

The separation system of the utility model also adopts a helical tube separator with holes, which is a new type of centrifugal separation component. Under the conditions allowed by the process, it should first consider reducing the radius of gyration and increasing the number of turns to improve the centrifugal force. The number, size and position of the wall openings have a significant impact on the separation efficiency, and an optimal scheme can be determined through experiments and theoretical analysis.

The separation system of the utility model also adopts the T-shaped tube part with the pre-separation effect of the principle of expansion and gravity, which can play the role of gas-liquid pre-separation, and can be used as the pre-equipment of the spiral tube separator to achieve a good separation effect.

So far, no such composite separator has been found in the world and at home, and it can achieve the separation effect of less than 1% water in oil under different oil products and oil-water ratio conditions.

Description of drawings

Fig. 1 is front (a), side (b) cross-sectional view of flow divider structure of the present invention;

Fig. 2 is a schematic structural view of a T-shaped pipe separation device of the present invention;

Fig. 3 is a schematic diagram of the spiral tube structure of the present invention;

Fig. 4 is the structural representation of composite oil-water separator of the present invention;

Fig. 5 is another kind of composite oil-water separator embodiment schematic diagram of the present invention;

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail

Example 1

Referring to Fig. 1, make the first shunt 10 and the second shunt 20, the body of the shunt is a pressure-resistant vessel with a three-way tubular structure, and a liquid inlet 11 is provided on the pressure-resistant vessel, and the three-way pipe The nozzle on the left side is the liquid inlet 11, the nozzle on the right side of the three-way pipe is the lower liquid outlet 13, and the upper nozzle of the three-way pipe is the upper liquid outlet 12; Divider baffle 16 divides cavity into upper and lower two spaces, upper chamber 14 communicates with upper liquid outlet 12, lower chamber 15 communicates with lower liquid outlet (or horizontal liquid outlet) 13, and both layers of space are connected with inlet. The liquid port is connected. The end of the splitter is flush with the end of the liquid inlet. The splitter is located above one end of the nozzle on the right side of the tee pipe and has a plug 161 that closes the upper part of the nozzle. The longitudinal section of the plug facing the end of the liquid inlet is parabolic. Each nozzle of the separator body of the said three-way pipe structure is provided with a connecting flange 17 . There are three groups of bar-shaped grooves with different heights on the inner cavity wall of the diverter body, which can respectively cooperate with the two sides of the diverter partition.

The total length of the first shunt 10 and the second shunt 20 and the inner cavity radius L/r=8, the shunt cavity has an appropriate volume, the ratio of the inner cavity length to the radius l/r=5 or 6, the height and the inner cavity The ratio of the cavity radius is H/r=4, and the inner diameter of the flow divider is equal to the inner diameter of the horizontal incoming liquid pipe 21 (referring to FIG. 3 ).

Example 2:

Referring to Fig. 1 and Fig. 2, make a T-shaped pipe separation device: T-shaped pipe separation device is exactly by horizontal total liquid inlet pipe 21, upper horizontal pipe 24, lower horizontal pipe 23, vertical pipe 22, flow divider 10 (20) And valve 41 is formed. The horizontal main liquid inlet pipe 21 is connected to the incoming flow pipeline, the other end is connected to the inlet 11 of the flow divider 10, the upper outlet 12 of the flow divider is connected to the vertical pipe 22, the horizontal outlet 13 is connected to the lower horizontal pipe 23, and the upper end of the vertical pipe is connected to the valve 41. The other side of 41 is connected with the bottom opening 31 of the 90-degree elbow, and the elbow is connected with the upper horizontal pipe 24. N vertical pipes 22 are connected in parallel between the upper horizontal pipe 24 and the lower horizontal pipe 23, thereby forming a T-shaped pipe separating device. The T-shaped pipe is at least composed of a total liquid inlet pipe, a vertical pipe, an upper horizontal pipe and a lower horizontal pipe, and there may be many vertical pipes. The diameter of the upper and lower horizontal pipes of the T-shaped pipe is 50mm, and the diameter d of the vertical pipe is smaller than the diameter D of the horizontal pipe. In this embodiment, the pipe diameter is 40mm. The spacing S between adjacent vertical tubes is greater than 30 times the diameter D of the horizontal tube. The length L of the vertical pipe is 15 times the diameter d of the vertical pipe, which is 600 mm in this embodiment. The main liquid inlet pipe and the first vertical pipe may not be connected with a diverter, but only use a three-way pipe, or connect a diverter to strengthen the oil-water layer, such as this embodiment. The end of the upper horizontal pipe can directly enter the 501 helical tube without being connected with a flow divider, or can be connected with a flow divider, as in this embodiment.

Example 3

Referring to Fig. 3, make a spiral pipe separator: the spiral pipe main body 500 is a vertical structure, and the spiral pipe main body 500 is fixed on the support 90 of the spiral pipe main body, and the spiral pipe input pipe 51-port of the spiral pipe main body 500 is installed with the input pipe Valve 42, helical pipe input pipe 55 one port is installed output pipe valve 43; The total number of turns is 25, and the helical pipe upper part of helical pipe main body 500 has 4 circles to be band hole section 54, and the band hole section below is closed section 52; The number of small holes in the upper part of the spiral tube from top to bottom is n ₁ , n ₂ , n ₃ , and the diameters are d ₁ , d ₂ , d ₃ ; the number and diameter of round holes should follow the following design criteria: n ₁ ≤n ₂ ≤n ₃ , d ₁ ≤d ₂ ≤d ₃ ; a circular hole 70 is opened on each circle of the section with a hole, and the circular hole 70 is opened from the 1/4 circumference of the outlet of the output pipe 55 holes, and the round holes 70 are evenly opened on the outside of the spiral tube, at the position of an angle of α=45° with the horizontal line, and there is no round hole on the spiral tube between the round holes 70 on two adjacent turns of the spiral tube. The spiral pipe section without holes is the adjustment section, and the length of the adjustment section is 1/2 circle; the spiral pipe section with a half-circle interval between the round hole 70 of the second circle of spiral pipe and the circle hole 70 of the third circle .

In this embodiment, the radius of gyration of the spiral tube of the spiral tube body 500 is R, the pitch is H, the inner diameter of the tube is D ₁ , and the outer diameter of the tube is D ₂ , and its design parameters follow the following relationship: $450\≤\frac{2\mathrm{\πR}(N-4)}{{\mathrm{D.}}_1}\≤500,$ $2\≤\frac{h}{{\mathrm{D.}}_2}\≤2.5;$

Among them, the values of R, D ₁ and D ₂ are most suitable in the following ranges: 150mm≤R≤200mm, 20mm≤D ₁ ≤30mm, 25mm≤D ₂ ≤35mm.

Example 4

Referring to Fig. 4, make a composite oil-water separation device consisting of the diverter of embodiment 1-3, the T-shaped pipe separation device, and the spiral pipe.

The composite separator is communicated with the horizontal total liquid inlet pipe 21, the vertical pipe 22 and the lower horizontal pipe 23 by three ports of the first flow divider 10; Between the lower horizontal pipe 23 and the upper horizontal pipe 24, three parallel vertical pipes 22 are connected in parallel; Port connection, the output port of the second spiral tube 502 is connected to the fourth separation box 604 through the liquid outlet pipe 552, and the bottom of the second sedimentation separation box 602 is connected to the bottom of the fourth sedimentation separation box 604 through an intermediate pipe 802 Connected, the top communicates with the top of the fourth sedimentation separation box through an intermediate pipe 804; the top of the bottom pipe of the side wall corresponding to the entrance of the fourth sedimentation separation box 604 is also provided with a horizontal drain pipe 27 and a horizontal oil drain pipe 28; Four settling separation boxes are provided with vertical partitions to separate the two sides of the inlet and outlet into two parts; the end port of the upper horizontal pipe 24 communicates with a port of the second flow divider 20, and the other two ports of the second flow divider 20 Respectively connect the oil delivery pipe 25 and the delivery pipeline 26, the oil delivery pipe 25 communicates with the third settling separation box 603, the delivery pipeline 26 communicates with the input port of the first spiral pipe 501 in the first settling separation box 601, the first Spiral pipe 501 is installed in the settling separation box 601, and its other outlet is connected into the 3rd settling separation box 603 by outlet pipe 551, the bottom and the top of the first settling separation box 601 and the 3rd settling separation box 603 A water delivery pipe 801 and an oil delivery pipe 803 are connected between the side walls; a horizontal drainage pipe 27 and a horizontal oil discharge pipe 28 are also provided at the bottom and middle of the side wall corresponding to the entrance of the third settling separation box 603; Both sides are vertically fixed partitions, which divide the two sides of the inlet and outlet into two parts, and the gap between the top of the partition and the top surface in the third settling separation box is an overflow port; the height of the horizontal oil discharge pipe 28 is lower than The third settling separation box 603 and the fourth settling separation box 604 have an overflow port of 150-300 mm in the two boxes, and the height of the horizontal drain pipe 27 is 100 mm higher than the bottom of the box body; there are respectively a water delivery pipe 81 and an oil delivery pipe 82 connected by a tee On the horizontal drain pipe 27 and the horizontal oil drain pipe 28, it is used as a water outlet and an oil outlet. In this embodiment, the diameter of the upper and lower horizontal pipes is 50 mm, and the diameter d of the vertical pipe 22 is 40 mm; the length H of the vertical pipe is 600 mm. The distance between two adjacent vertical pipes is 1500mm. The spiral tube body 500 has a total of 20 coils, and the closed section 52 has 16 coils.

Example 5

Referring to Fig. 5, make a utility model oil-water separation system.

The difference between this embodiment and Embodiment 4 is that the integrated design is adopted, and the flow divider, T-shaped pipe, spiral pipe and settling separation box are combined into an overall structure, which is compact in size, light in weight, and the distribution of pipelines is reasonable. The main body of this embodiment is composed of four independent boxes to form an integral airtight pressure-bearing container. The T-shaped tube separation device is arranged on the outside or inside of the container of this embodiment, and the length is 3/4 of the outer circumference of the container, and its effect is to carry out preliminary separation of oil and water; the first helical tube 501 and the second helical tube 502 respectively treat the first The incoming liquid in the upper horizontal pipe 24 connected to the flow divider, and the incoming liquid in the lower horizontal pipe 23 of the first flow divider 10, the first spiral pipe 501 is in the first settling tank 601, and the second spiral pipe 502 is in the second In the settling box 602, the liquids in the two boxes do not communicate with each other; the liquid after the cyclone centrifugal separation of the first spiral tube 501 enters the third settling separation box 603 through 551 to continue gravity separation; the first settling box An overflow pipe 803 is installed between 601 and the third settling box 603, the diameter of which is 50 mm, and the number is 6. The height is lower than the lowest position of the opening of the spiral pipe. The oil in the upper layer of the first settling box 601 can pass through the overflow pipe. The pipe enters the third settling box 603 to continue gravity settling; the liquid after the spiral tube 502 cyclone centrifugal separation process enters the settling separation box 604 through 552 and continues to carry out gravity separation; the second settling box 602 and the fourth settling box An overflow pipe 804 is installed in room 604 with a pipe diameter of 50mm and 6 in number, and the height is lower than the lowest position of the opening of the spiral pipe. The oil in the upper layer of the second settling box 602 can enter the fourth settling box through the overflow pipe 604 continues to carry out gravity settling; the end of the upper horizontal pipe enters the helical pipe and is equipped with a second flow divider 20, and the liquid outlet on it directly enters the fourth settling box 604 through the pipe 26 (it can also enter the third settling box 603) Gravity settling and separation are carried out; oil with a water content of less than 1% is finally obtained in the third settling tank 603 and the fourth settling tank 604; the water is drawn out from the bottom opening of the container.

It can also include 3 valves, the first valve 41 is installed on the upper port of the vertical pipe 22, the other port of the valve 41 is connected with the bottom port 31 of the 90-degree elbow, and the elbow is connected with the upper horizontal pipe 24; the remaining two Two valves are installed in the other two vertical pipes 22 respectively.

Claims (10)

1. A composite oil-water separation device, comprising a flow divider, a settling separation tank and connecting pipelines; it is characterized in that the flow divider has 2, the liquid inlet (11) and the upper liquid outlet of the first flow divider (12) and the lower liquid outlet (13) are communicated with the horizontal total liquid inlet pipe (21), the vertical pipe (22) and the lower horizontal pipe (23) respectively; the vertical pipe (22) is connected with the elbow (31) and the upper The horizontal pipes (24) are connected successively; between the described lower horizontal pipe (23) and the upper horizontal pipe (24), three vertical pipes (22) arranged in parallel are connected in parallel; the described lower horizontal pipe (23) is connected with the installation Connected to the input port of the second helical tube (502) in the second settling separation case (602), the output port of the second helical tube (502) is connected to the fourth separation case ( 604), the bottom of the second settling and separating box (602) is communicated with the bottom of the fourth settling and separating box (604) through an intermediate pipe (802), and its top is separated from the fourth settling by an intermediate pipe (804) The top of the casing (604) is communicated; a horizontal drainpipe (27) is installed on the outlet at the bottom of the side wall corresponding to the entrance of the fourth settling separation casing (604), and a horizontal oil drainpipe (28) is installed in the middle, the horizontal oil drainpipe (28) The other end penetrates from the middle of the third settling and separating box (603), and the other port of the horizontal drain pipe (27) is fixed with the outlet at the bottom of the third settling and separating box (603); the upper horizontal pipe The end port of (24) is connected with delivery pipeline (26), and this oil delivery pipe (25) is communicated with the 3rd settling separation box body (603), and this delivery line (26) is connected with the first settling separation box body (601) The input port of the first helical tube (501) is connected, and the first helical tube (501) is installed in the settling separation box (601); the other outlet of the first helical tube (501) is connected into the first helical tube (551) through the outlet pipe (551). Three settling separation boxes (603), the bottom of the first settling separation box (601) and the third settling separation box (603) and the top side wall are connected with the first pipeline (801) and the second pipeline (803); The outlet at the bottom of the side wall corresponding to the inlet and the middle part of the side wall are respectively communicated with the horizontal drain pipe (27) and the horizontal oil drain pipe (28) at the third settling separation box body (603); the horizontal drain pipe (28) The height is 150-300mm lower than the overflow ports in (603) and (604), and the height of the horizontal drainage pipe (27) is 100mm higher than the bottom of the casing; on the horizontal drainage pipe (27) and the horizontal oil discharge pipe (28) Water outlet pipe (81) and oil outlet pipe (82) are installed respectively by tee. 2. by the described composite oil-water separation device of claim 1, it is characterized in that, also comprise the second diverter (20), the end port of described upper horizontal pipe (24) and the second diverter (20) One port is connected, and the other two ports of the second flow divider (20) are respectively connected to the oil delivery pipe (25) and the delivery pipeline (26), and the oil delivery pipe (25) is connected to the third settling separation box (603). 3. The composite oil-water separation device according to claim 1 or 2, characterized in that, said first flow divider (10) and second flow divider (20) are a three-way pipe-shaped pressure vessel, The left pipe mouth (11) of this three-way pipe is the liquid inlet, the right pipe mouth (13) of the three-way pipe is the lower liquid outlet, and the upper pipe mouth (12) of the three-way pipe is the upper liquid outlet. In the pressure vessel, there is a horizontally arranged divider (16) in the inner cavity, which divides the cavity into upper and lower spaces, and the upper space (14) communicates with the upper liquid outlet (12) , the lower space (15) communicates with the lower liquid outlet (13), and the two layers of space communicate with the liquid inlet (11), and the diameter of the inner cavity is equal to the diameter of the incoming liquid pipe connected to the liquid inlet ; The said splitter is positioned at the top of one end of the pipe mouth on the right side of the tee pipe and has a plug (161) which closes the top of the pipe mouth; the longitudinal section of the said plug towards the end of the liquid inlet is parabolic; the said The ratio of the height H from the central axis of the body to the upper liquid outlet to the radius r of the diverter inner cavity is less than 5; there are at least two groups of different heights on the inner cavity wall of the body, which can be connected to the two divider partitions respectively. A strip-shaped groove with matching sides; and the ratio of the length L from the liquid inlet to the horizontal liquid outlet of the body to the radius r of the shunt inner cavity is less than 10, and each nozzle of the body is provided with a connecting flange . 4. The composite oil-water separation device according to claim 3, characterized in that, the end of the divider baffle is flush with the end of the liquid inlet; There are at least two groups of bar-shaped grooves with different heights, which can respectively cooperate with the two sides of the divider partition. 5. The compound oil-water separation device according to claim 3, characterized in that, it also includes 3 valves, the first valve (41) is installed on the upper port of the vertical pipe (22), and the valve (41) is another One port is connected with (90) degree elbow bottom mouth (31), and elbow is connected with upper horizontal pipe (24); All the other two valves are installed in other two vertical pipes (22) respectively. 6. The composite oil-water separation device according to claim 1, wherein the vertical pipe diameter d is less than the horizontal pipe diameter D, and the vertical pipe length H is 15 times the vertical pipe diameter d, adjacent vertical The tube spacing S is greater than 30 times the horizontal tube diameter D. 7. The composite oil-water separation device according to claim 1, characterized in that, said helical tube comprises a helical tube main body (500) which is a vertical structure, and the helical tube main body (500) is fixed on the support of the helical tube main body On (90), the spiral pipe input pipe (51) one port of the spiral pipe main body (500) installs the input pipe valve (42), and the spiral pipe input pipe (55) one port installs the output pipe valve (43); the total number of turns is N, the upper part of the helical tube of the helical tube main body (500) has 4 circles as a section with holes (54), the section below the section with holes is a closed section (52), and each circle of the section with holes has a round hole (70) , the circular hole (70) begins to perforate from the outlet 1/4 circumference of the output pipe (55), and the circular hole (70) is evenly opened on the outside of the spiral tube, forming an angle of α=45° with the horizontal line The position of the circular hole (70) on the adjacent two circles of spiral pipes is not equipped with circular holes on the spiral pipe with a half-circle interval between them; the spiral pipe section without holes is the adjustment section, and the length of the adjustment section is 1/2 Circumference: the spiral pipe section that is spaced half a circle between the round hole (70) opened by the second circle of spiral pipe and the circle hole (70) opened by the third circle. 8. The composite oil-water separation device according to claim 1, characterized in that, the spiral tube radius of gyration of the spiral tube main body (500) is R, the pitch is H, the inner diameter of the tube is D ₁ , and the outer diameter of the tube is D ₂ , whose design parameters follow the following relationship: $450\≤\frac{2\mathrm{\πR}(N-4)}{{\mathrm{D.}}_1}\≤500,$ $2\≤\frac{h}{{\mathrm{D.}}_2}\≤2.5;$ Among them, the values of R, D ₁ and D ₂ are most suitable in the following ranges: 150mm≤R≤200mm, 20mm≤D ₁ ≤30mm, 25mm≤D ₂ ≤35mm. 9. The composite oil-water separation device according to claim 1 or 2, characterized in that, it is also included in the third settling separation box (603) and the fourth settling separation box (604), provided with two inlets and outlets The side partition is divided into two vertical partitions. The two side walls of the vertical partition are fixed on the two side walls of the settling separation box, which divides the container into two parts. The bottom is connected, and the upper gap is an overflow port. 10. The composite oil-water separation device according to claim 1 or 2, characterized in that, the total number of turns of the spiral tube is N, and N=4-30.

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