CN111318058A - Integrated gas-liquid-solid continuous separation device - Google Patents

Abstract

An integrated gas-liquid-solid continuous separation device. The device comprises an upper sealing cover, an outer cylinder and a lower sealing cover, wherein the upper sealing cover, the outer cylinder and the lower sealing cover are connected into a whole through flanges; an upper layer, a middle layer and a lower layer are formed in the inner cavity of the outer barrel, the upper layer is used for storing oil and gas after primary separation, the middle layer is used for storing oil after secondary separation, the lower layer is used for storing finally separated sand and water, and the layers are separated by a sieve plate with holes and an oil absorption felt; the mixed incoming liquid enters the cyclone for primary separation through the tangential inlet and the spiral tube type accelerating flow passage in an accelerating way, and then secondary separation is carried out through the oleophylic and hydrophobic oil absorption felt, so that the continuous separation of the multiphase medium is realized. The separation device realizes multi-stage continuous separation based on combined action of cyclone separation, sedimentation separation and membrane separation, and can realize high-precision continuous separation of oil, water, sand and gas four-phase media in one device.

Description

Integrated gas-liquid-solid continuous separation device

technical field

The invention relates to a separation and treatment device for oily sewage applied in the fields of petroleum, chemical industry, environmental protection and the like.

Background technique

With the continuous development of oilfields and the gradual increase in the water content of oilfield produced fluids, the water, sand and gas content of oilfield sewage has also gradually increased, and the cost of sewage treatment has also increased. If oily sewage is directly discharged without treatment, it will not only pollute the soil and water sources, but even destroy the balance of the ecosystem. The more common oily sewage treatment methods mainly include sedimentation separation, cyclone separation and filtration separation, etc. However, these traditional separation methods are not only complicated in process, complex in system, difficult to handle, and most of the equipment and separation medium are single, which cannot meet the increasingly developing industry. need. At present, there is a cyclone separator and a gas-liquid-solid separation system disclosed in patent CN 105779022 B in the research of gas-liquid-solid separation system in China, but a great problem of this patent is that the separation process is complicated and the facility occupies a large area.

SUMMARY OF THE INVENTION

In order to solve the technical problems mentioned in the background art, the present invention provides an integrated gas-liquid-solid continuous separation device to separate different media phases in different regions to achieve mutual non-interfering separation; at the same time, adding membrane separation technology to achieve The multiple separation between oil and water solves the disadvantage of low separation efficiency of the existing cyclone. In addition, the separation device has simple structure, convenient disassembly and assembly, can complete the continuous separation of gas-liquid-solid multiphase medium in the same separator, and has high separation efficiency and practicability.

The technical scheme of the present invention is as follows: the integrated gas-liquid-solid continuous separation device has an upper cover, a separation tank body and a lower cover. The separation tank is a hollow cylinder, and a mixed liquid general inlet is provided at the upper end of the right side of the separation tank. The upper and lower ends of the left side of the separation tank are respectively provided with a primary oil outlet and a secondary oil outlet. The body is connected and fixed with the upper cover and the lower cover respectively through flanges. It is unique in that:

The upper and lower baffle holders in the tank are respectively provided on the upper and lower sides of the separation tank, wherein the lower baffle holder in the tank has a gap at the opposite position to facilitate the taking and placing of the lower baffle.

The upper baffle and the lower baffle are respectively placed in the upper baffle holder in the tank and the lower baffle holder in the tank.

The separation device also includes a tangential inlet cyclone, a helical tube acceleration flow channel and an overflow conduit.

Among them, the upper end of the tangential inlet cyclone is an overflow pipe with a cover with an air guide channel in the middle, the tangential inlet plate is placed in the middle of the tangential inlet cyclone, the lower end is the outer cylinder of the cyclone, the three They are connected together by long bolts; the upper baffle, the lower baffle, the upper oil absorbing film and the lower oil absorbing film are all disc-shaped, and there are round holes in the middle of the upper oil absorbing film and the upper baffle for fixing the tangential inlet. Cyclone; both the upper baffle and the lower baffle have a number of small holes, which are used to drain the water phase after oil absorption and separation, and increase the oil-water separation efficiency; the lower oil absorption film and the lower baffle are opened in the central area. Four positioning holes corresponding to the sand guide pipe are used to fix and seal the sand guide pipe; the upper oil absorption film and the lower oil absorption film are made of oleophilic water filter felt; the overflow pipe in the cyclone is in the upper middle position of the overflow pipe There are several air inlet holes for the gas phase to enter, and the gas entering through the air inlet holes enters the air guide pipe through the air guide port and is discharged; in the overflow pipe in the cyclone, there are several oil passages at the bottom of the overflow pipe. A layer of lipophilic water filter felt is wrapped around the oil-passing hole, and most of the oil phase and a small part of the water phase entering the overflow pipeline through the oil-passing hole are discharged into the overflow conduit from the overflow nozzle at the top .

The structure of the tangential inlet disc is a circular ring, and there are four evenly distributed and penetrating screw holes on its upper end face, which are used to fix the position of the tangential inlet disc in the tangential inlet cyclone; There are two tangential inlet grooves with the same size and uniform distribution on the upper end of the disc. The notch of the tangential inlet groove gradually decreases from the outside to the inside, which is used to increase the tangential inlet velocity of the incoming liquid and provide sufficient pressure.

The upper part of the cyclone outer cylinder is provided with a tangential inlet and a chuck is arranged on the periphery of the cyclone cavity section, and the chuck is fixed with the upper baffle plate and supports the cyclone outer cylinder; There are four tangential sand guide openings on the bottom flow pipe, which are used to discharge the sand phase inside the outer cylinder of the cyclone, and a flange is connected to each of the four tangential sand outlets for connecting with the guide. The sand pipe is connected with each other; the sand guide pipe is an elbow with a flange, and the sand guide pipe is connected with the sand guide port of the outer cylinder of the cyclone through the upper flange plate, so as to realize the sand discharge in advance.

The lower cover is connected with the separation tank body through a large flange, and is provided with a sand discharge port at the bottom and a drain port on the left side; a sand guide table is welded inside the lower cover through the support frame, and the sand guide table is inverted. The semi-ellipsoidal shape of the buckle is used to guide the sand falling from the sand guide tube into the sand chamber below.

The spiral tube type accelerating flow channel is spiral, and the diameter decreases continuously from top to bottom; the inlet of the spiral tube type accelerating flow channel is connected with the total inlet of the mixed liquid, and the outlet of the spiral tube type accelerating flow channel is connected with the tangential inlet cyclone. The tangential inlet of the cyclone is connected; the lower end of the overflow conduit is provided with an equal-sized flange connected to the overflow pipe in the cyclone, and the two are connected to support and fix the overflow conduit; the oil and The water enters the overflow conduit through the overflow pipe in the cyclone, and then enters the overflow branch conduit along the flow channel of the overflow conduit.

The air duct has a left end flange, a settling pot and an air outlet bell mouth. The bottom of the settling pot is composed of two semicircular rubber diaphragms; the air duct is connected to the air guide port of the cyclone overflow pipe through the left end flange; The gas and a small amount of oil and water separated by the cyclone are discharged into the air pipe.

The present invention has the following beneficial effects:

The device adopts multiple separation processes such as cyclone technology, gravity sedimentation and membrane separation to achieve continuous separation of multiphase media; and the equipment is simple in structure and small in volume, most of which are connected by flanges, which are convenient for disassembly and use; by cyclone at the tangential inlet A helical tube acceleration flow channel is added to the front end of the cyclone to increase the tangential velocity in the cyclone, and it is used in conjunction with the tangential inlet disc to increase the inlet pressure, which can effectively improve the separation efficiency; the CN208201821U high-performance oil-absorbing felt method is adopted. It realizes the high-efficiency separation of oil and water, prolongs the separation time of oil-water mixture, and improves the oil removal efficiency; by adding a settling pot in the air duct, the oil-water phase medium remaining in the air duct can be effectively removed, so as to prevent the oil-water phase from blocking the air duct and improve the Degassing efficiency: by opening a tangential sand discharge port and a sand guide pipe in the straight pipe section of the cyclone bottom flow to realize the sand discharge in advance, to prevent the sand phase from blocking the oil absorption film in the secondary separation area, to achieve efficient separation of oil and water, and to increase the use of oil absorption film Service life; adding a sand guide table to avoid the erosion of the cover by sediment and increase its service life.

The device not only has the separation characteristics of the existing separation equipment, but also introduces the membrane separation method on this basis, and combines the separation processes such as degassing, oil separation, water removal, and sand removal in an orderly manner, which not only maintains the original separation equipment High precision separation performance, and realizes the processing capacity of multiple continuous separations. At the same time, each separator is integrated into a separation tank according to the arrangement from top to bottom and from inside to outside, which has the advantages of simple process and small footprint. , convenient transportation, strong practicability and so on. It can be used stably in actual production, and realizes the high-precision continuous separation effect of gas-liquid-solid integration.

In conclusion, the separation device can be applied not only in the petrochemical industry, but also in other fields such as metallurgy and water treatment, and has a good development prospect.

Description of drawings:

Figure 1 is a schematic diagram of the shape and internal structure design of an integrated gas-liquid-solid high-precision continuous separation device.

Figure 2 is an overall cross-sectional view of an integrated gas-liquid-solid high-precision continuous separation device.

Figure 3 is an exploded view of the structure of the integrated gas-liquid-solid high-precision continuous separation device.

Figure 4 is an exploded view of the internal components of the tangential inlet cyclone.

FIG. 5 is an external view of the structure of the upper cover.

Fig. 6 is a half sectional view of the separation tank.

Fig. 7 is an external view of the structure of the upper baffle plate and the upper oil absorbing film.

FIG. 8 is an external view of the structure of the lower baffle plate and the lower oil absorbing film.

FIG. 9 is an external view of the structure of the helical tube acceleration flow channel.

Figure 10 is a structural diagram of the appearance of the overflow pipe in the cyclone.

Figure 11 is a half cross-sectional view of the overflow pipe in the cyclone.

Fig. 12 is the external structure diagram of the tangential inlet disc.

Fig. 13 is a structural view of the external appearance of the outer cylinder of the cyclone.

Fig. 14 is a half sectional view of the outer cylinder of the cyclone.

Figure 15 is a half cross-sectional view of the overflow conduit.

Figure 16 is an external structural view of the overflow conduit.

Figure 17 is a diagram of the external structure of the airway.

18 is a cross-sectional view of the airway.

Fig. 19 is the external structure diagram of the sand guide pipe.

FIG. 20 is a structural diagram of the appearance of the lower cover.

Figure 21 is a half cross-sectional view of the lower cover.

In the figure, 1- primary separation area, 2- secondary separation area, 3- tertiary separation area, 4- upper cover, 5- separation tank, 6- lower cover, 7- overflow conduit, 8- spiral Tubular acceleration flow channel, 9-air guide pipe, 10-tangential inlet cyclone, 11-upper oil absorption film, 12-upper baffle, 13-sand guide pipe, 14-lower oil absorption film, 15-lower baffle, 16- overflow pipe, 17- tangential inlet disc, 18- cyclone outer cylinder, 401- exhaust port, 501- mixed liquid total inlet, 502- primary oil outlet, 503- secondary oil outlet, 504-upper baffle holder, 505-lower baffle holder, 601-lower cover large flange, 602-sand discharge port, 603-drainage port, 604-support frame, 605-sand guide table, 701-overflow Flow conduit flange, 702-overflow branch conduit, 901-settling pot, 902-air outlet bell mouth, 903-rubber diaphragm, 904-air conduit flange, 1301-sand conduit flange, 1601-air inlet , 1602-air guide port, 1603-oil hole, 1604-overflow nozzle, 1701-inlet plate fastening screw hole, 1702-tangential inlet groove, 1801-tangential inlet, 1802-cyclone chuck, 1803- Sand guide port, 1804-sand guide port flange.

Detailed ways:

The present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figures 1 to 21, the integrated gas-liquid-solid high-precision continuous separation device has a first-stage separation zone 1, a second-stage separation zone 2, and a third-stage separation zone 3, wherein the three separation zones pass through the separation tank. The body 5 acts in sequence. The shape of the separation tank body 5 is generally a hollow cylindrical section, and a mixed liquid general inlet 501 is provided at the upper end of the right side, and a primary oil outlet 502 and a secondary oil outlet are respectively provided at the upper and lower ends of the left side. 503, in the middle, a card seat is set up and down respectively to fix the upper baffle 504 and the lower baffle 505, wherein the lower card seat has a gap in the opposite position, which is convenient for taking and placing the lower baffle 15, and the whole separation tank is The body is connected and fixed with the upper cover 4 and the lower cover 5 respectively through flanges.

In the first-stage separation area 1, the upper end of the tangential inlet cyclone 10 is an overflow pipe 16 with a cover and an air guide channel in the middle, a tangential inlet disc 17 is placed in the middle, and the lower end is outside the cyclone. The three cylinders 18 are connected together by long bolts. According to the principle of cyclone separation, the primary separation of medium phases with different densities is achieved under the action of centrifugal force. The upper baffle 12, the lower baffle 15, the upper oil-absorbing film 11, and the oil-absorbing film 14 are all in the shape of a disk, wherein a circular hole is opened between the upper oil-absorbing film 11 and the upper baffle 12 for fixing the cyclone. The upper and lower baffles are provided with a number of small holes, which are used to drain the water phase after oil absorption and separation, so as to increase the oil-water separation efficiency. 13. The corresponding positioning holes are used to fix and seal the sand guide pipe. The oil-absorbing film adopts the high-performance oil-absorbing felt given by the patent number CN208201821U.

In the secondary separation area 2, the appearance shape of the upper cover 4 is hemispherical, and an exhaust port 401 is provided at the top, and is connected to the separation tank 5 through a flange. The structure of the helical tube acceleration channel 8 has a continuously decreasing diameter from top to bottom and is spiral; it can not only provide acceleration for the mixed liquid through helical acceleration and gravitational acceleration, but also increase its inlet pressure by changing its diameter. To enhance the separation efficiency, the connection mode is mainly fixed by the flanges at the inlet and outlet, the mixed liquid total inlet 501 of the separation tank and the tangential inlet 1801 of the tangential inlet cyclone. The lower end of the overflow duct 7 is provided with an equal-sized flange 701 connected to the overflow pipe (16) in the cyclone, and the two are connected to support and fix the overflow duct. Part of the oil and a small part of water enter the overflow conduit through the overflow pipe, and enter the overflow sub-conduit-702 along the flow channel of the overflow conduit. Finally, it is discharged into the primary separation zone 1 under the action of gravity. The working principle of the components of the air duct 9 mainly relies on the air guide port 1602 to discharge the gas separated by the cyclone and a small part of the oil and water into the air duct, and most of the gas and a small part of the oil and water are discharged again in the settling pot 901 of the air duct. Gravity separation is completed, the gas in the light phase is discharged from the air outlet bell 902 through a long and narrow pipeline, and the oil and water in the heavy phase remain at the bottom of the sedimentation pot, wherein the bottom of the sedimentation pot is composed of two semicircular rubber diaphragms 903 , when the oil and water stored in the settling pot reaches a certain amount, it will be discharged through the gap between the two rubber diaphragms and enter the primary separation area. closure. The connection and fixation of this component is mainly connected with the air guide port 1602 of the overflow pipe of the cyclone through a flange 904 at the left end thereof.

In the tertiary separation area 3, the overflow pipe 16 in the cyclone is formed by welding the overflow pipe and the cover plate together to form a part, and a number of inlets for the gas phase are arranged at the upper and middle position of the overflow pipe. In the air hole 1601, the gas entering from the air intake hole enters the air duct through the air guide port 1602 and is discharged; and at the bottom of the overflow pipe, there are some larger oil-passing holes 1603, which are wrapped around the periphery of these oil-passing holes. A layer of oleophilic water filter felt is used to ensure the high efficiency of oil-water separation of the cyclone. Most of the oil phase and a small part of the water phase entering the overflow pipeline through the oil-passing hole 1603 are discharged into the overflow conduit through the overflow nozzle 1604 at the top. middle. The structure of the tangential inlet disc 17 is generally annular, and four evenly distributed and penetrating screw holes 1701 are opened on its upper end surface, which are used to fix the position of the tangential inlet disc in the cyclone. The upper end is also distributed with two tangential inlet grooves 1702 with the same size and uniform distribution, and the grooves of the grooves gradually decrease from the outside to the inside, so as to increase the tangential inlet velocity of the incoming liquid and provide sufficient pressure. The structure of the cyclone outer cylinder 18 is a double tangential inlet double cone segment cyclone, the upper part is provided with a tangential inlet 1801 and a chuck 1802 is arranged on the periphery of the cyclone cavity segment, which is fixed and supported with the upper baffle 12 In the outer cylinder of the cyclone, there are four tangential sand guide ports 1803 on the bottom flow pipe at the lower end of the outer cylinder of the cyclone, which are used to discharge the sand phase inside the outer cylinder of the cyclone, and produce sand in the four tangential directions. Each port is connected with a flange 1804 for connecting with the sand guiding pipe. The external shape of the sand guiding pipe 13 is a curved pipe with a flange, and this part is connected with the sand guiding port 1803 of the outer cylinder of the cyclone through its upper flange 1301, so as to realize the sand discharge in advance. The overall appearance of the lower cover 6 is similar to that of the upper cover, it is generally semi-spherical, and is connected to the separation tank 5 through a large flange 601, and is provided with a sand discharge port 602 at the bottom and a drain port 603 on the left side. ; And the inside of the part is welded with a sand guide table 605 through the support frame 604, and the sand guide table is placed in the form of a semi-ellipsoid undercut, which is mainly used to introduce the sand falling from the sand guide pipe into the sand chamber below, At the same time, it acts as a buffer to avoid the grinding impact of the sand against the wall of the lower cover, and prolong its service life.

Figure 2 is an overall cross-sectional view. The device is composed of a separation tank, a spiral tube acceleration flow channel, a first-stage oil-gas-water-sand cyclone flow splitting section, a second-stage oil-water film separation section, and a sand settling section. It includes a primary separation zone 1, a secondary separation zone 2 and a tertiary separation zone 3.

3 is an exploded view of the structure of the integrated gas-liquid-solid high-precision continuous separation device. The components in the figure are the upper cover 4, the separation tank body 5, the lower cover 6, the overflow conduit 7, and the spiral tube type acceleration flow channel 8. , Air conduit 9, tangential inlet cyclone 10, upper oil absorbing film 11, upper baffle 12, sand guiding pipe 13, lower oil absorbing film 14, lower baffle 15 and so on. The exploded view of the inner parts of the tangential inlet cyclone 7 is shown in Figure 4, the upper end is an overflow pipe 16 with a cover and an air guide channel in the middle, a tangential inlet disc 17 is placed in the middle, and the lower end is a swirl The outer cylinder 18 is connected together by long bolts. According to the principle of cyclone separation, the medium phases of different densities realize the primary separation under the action of centrifugal force. FIG. 5 is a structural appearance view of the upper cover 4 , which is hemispherical in shape, and is provided with an exhaust port 401 at the top, and is connected to the separation tank 5 through a flange. 6 is a half-sectional view of the separation tank 5, which is generally a hollow cylindrical section, and is provided with a mixed liquid general inlet 501 at the upper end of the right side, and a primary oil outlet 502 and a secondary oil outlet 502 are respectively provided at the upper and lower ends of the left side. The oil outlet 503 is provided with a card seat at the top and bottom respectively to fix the upper baffle 504 and the lower baffle 505, wherein the lower card seat has a gap in the opposite position to facilitate the taking and placing of the lower baffle 15. The entire separation tank is connected and fixed with the upper cover 4 and the lower cover 5 respectively through flanges. Figures 7 and 8 are the structural appearance diagrams of the upper and lower baffles and the upper and lower oil absorbing membranes, respectively. Their structural shapes are in the shape of a disc. A circular hole is opened between the upper oil absorbing membrane and the upper baffle for fixing the cyclone. The baffles have several small holes to drain the water phase after oil absorption and separation, and increase the oil-water separation efficiency. The positioning hole is used to fix and seal the sand guide pipe, wherein the oil-absorbing film mentioned in this article adopts the high-performance oil-absorbing felt described in the patent number CN208201821U. Fig. 9 is a structural appearance view of the helical tube acceleration flow channel 8. The flow channel has a spiral shape with a continuously decreasing diameter from top to bottom. It can not only provide acceleration for the mixed liquid through helical acceleration and gravitational acceleration, but also change The diameter is used to increase the inlet pressure and enhance the separation efficiency. The connection mode is mainly fixed by the flanges at the inlet and outlet and the total inlet 501 of the mixed liquid of the separation tank and the tangential inlet 1801 of the tangential inlet cyclone. Fig. 10 and Fig. 11 are the external structure view and half-section view of the overflow pipe 16 in the cyclone, respectively. The overflow pipe is formed by welding the overflow pipe and the cover plate together to form a part. The position is provided with several air inlet holes 1601 for the gas phase to enter, and the gas entering from the air inlet holes enters the air guide pipe through the air guide port 1602 and is discharged; and at the bottom of the overflow pipe, there are some larger oil-passing holes 1603. By wrapping a layer of oleophilic water filter felt on the periphery of these oil-passing holes to ensure the high efficiency of oil-water separation of the cyclone, most of the oil phase and a small part of the water phase entering the overflow pipe through the oil-passing holes are removed from the top of the cyclone. The overflow nozzle 1604 discharges into the overflow conduit. Fig. 12 is the external structure diagram of the tangential inlet disc 17, which is generally annular, and has four evenly distributed and penetrating screw holes on its upper end surface, which are used to fix the tangential inlet disc in the swirling flow. position in the device, and two tangential inlet grooves 1701 with the same size and uniform distribution are also distributed at the upper end. The grooves gradually decrease from outside to inside to increase the tangential inlet velocity of the incoming liquid and provide enough pressure. Figures 13 and 14 are the external structure view and half-section view of the cyclone outer cylinder 18 respectively. The cyclone outer cylinder structure is a tangential inlet double cone section cyclone, and its upper part is provided with a tangential inlet 1801 and is in the cyclone flow. There is a chuck 1802 on the periphery of the cavity section, which is fixed with the upper baffle plate and supports the outer cylinder of the cyclone. There are four tangential sand guide ports 1803 in the underflow pipe at the lower end of the outer cylinder of the cyclone, which are used to disperse the cyclone. The sand phase inside the outer cylinder of the device is discharged, and a flange is connected to each of the four tangential sand outlets for connecting with the sand guiding pipe. Fig. 15 and Fig. 16 are respectively a half-section view and an external structural view of the overflow conduit 7. The lower end of this part is provided with an equal-sized flange connected to the overflow pipe 16 in the cyclone, and the two are connected for supporting and fixing the overflow pipe. After the overflow conduit is separated by cyclone, most of the oil and a small part of water enter the overflow conduit through the overflow conduit, and then enter the overflow branch conduit 701 along the flow channel of the overflow conduit. Finally, it is discharged into the primary separation area under the action of gravity. Figures 17 and 18 are the external structural diagram and half-section view of the air conduit 9, respectively. The working principle of this part mainly relies on the air conduit 1602 to discharge the gas and a small amount of oil and water separated by the cyclone into the air conduit. Part of the gas and a small amount of oil and water are separated again by gravity in the settling pot 901 of the air duct, the gas in the light phase is discharged from the gas outlet bell 902 through the narrow and long pipeline, and the oil and water in the heavy phase remain at the bottom of the settling pot. The bottom of the sedimentation pot is composed of two semicircular rubber diaphragms 903. When the oil and water stored in the sedimentation pot reaches a certain amount, it will be discharged into the first-level separation area through the gap between the two rubber diaphragms. The rubber diaphragm will return to its original state due to its elasticity, closing the bottom of the settling pot. The connection and fixation of this component is mainly connected with the air guide port 1602 of the overflow pipe of the cyclone through a flange at its left end. Fig. 19 is the external structure diagram of the sand guide pipe 13. The shape of this part is an elbow with a flange. The part is connected with the sand guide port 1803 of the outer cylinder of the cyclone through its upper flange 1301, so as to realize the advance discharge. sand. Fig. 20 is the appearance structure diagram of the lower cover 6. The overall appearance of this part is similar to that of the upper cover. It is generally a hemispherical shape. A drain 601 is provided on the side; Fig. 21 is a half cross-sectional view of the lower cover 6. In conjunction with Fig. 21, a sand guiding table 603 is welded inside the part through a support frame, and the sand guiding table is in the form of a semi-ellipsoid inverted buckle. It is mainly used to guide the sand falling from the sand guide tube into the sand chamber below, and at the same time it acts as a buffer to avoid the grinding impact of the sand against the wall of the lower cover and increase its service life.

The working principle and working process of the integrated gas-liquid-solid high-precision continuous separation device are described in detail below:

The working principle of the present invention is as follows: The present invention is a separation device that works together through multiple separation principles such as cyclone separation, gravity sedimentation and membrane separation. The mixed liquid enters the separation device through the total mixed liquid inlet of the device, enters the cyclone through the tangential inlet after passing through the helical tube acceleration flow channel, and then realizes secondary acceleration through the tangential inlet disk, and then enters the cyclone in the cyclone. Under the action of centrifugal force, due to the different densities of different medium phases, a separation is achieved. The lightest gas phase and the less oil-water phase first enter the sedimentation pot through the air guide hole and then the exhaust pipe. By gravity, the gas phase finally passes through the exhaust port. Discharge, the remaining oil-water phase in the sedimentation pot is discharged into the primary separation area through the rubber diaphragm at the bottom of the sedimentation pot; most of the lighter oil phase and some of the heavier water phase pass through the overflow pipe and the overflow separator. The conduit is also discharged into the primary separation area; the oil-water mixture in the primary separation area is separated by the high-performance oil-absorbing felt on CN208201821U to keep the oil phase in the primary separation area, and when the oil phase stored in it reaches a certain height, it will pass through The primary oil discharge port on the tank body is discharged to the outside of the tank, and the water phase enters the secondary separation area through the upper oil absorption film and the upper baffle. Most of the remaining water phase and all sand phases in the cyclone and a small part of the oil continue to separate in the cone section of the cyclone, and under the action of centrifugal force and gravity, the sand phase gathers to the outermost layer, and passes through the cyclone. It is discharged from the tangential sand outlet in the straight pipe section of the cyclone and then discharged into the tertiary separation area through the sand guide pipe; most of the remaining water phase and a small part of the oil phase are directly discharged into the second stage through the bottom flow outlet of the cyclone. Secondary separation area; the water phase discharged from the primary separation area and the bottom flow port of the cyclone are discharged to the secondary separation area, and the oil-water mixture is then passed through the CN208201821U high-performance oil-absorbing felt laid at the bottom of the secondary separation area to complete the secondary separation. The phase continues to be stored in the secondary separation area. The water phase is discharged into the tertiary separation area, and when the oil phase stored in the secondary separation area reaches a certain amount, it is discharged through the secondary oil outlet on the separation tank. The sand phase discharged through the sand guide pipe will first pass through the sand guide table in the process of entering the tertiary separation area to avoid the impact and wear of the sediment on the lower cover, and then enter the sand chamber, and pass through the secondary separation. The water phase and sand phase discharged from the area are settled by gravity in the tertiary separation area, the heaviest sand phase is settled in the bottom sand chamber, and the lighter water phase is placed on the sand phase. value is discharged through the drain on the left.

The working process of the present invention is as follows:

The mixed liquid enters the separation device through the mixed liquid general inlet 501 of the device, enters the cyclone 10 through the tangential inlet through the spiral tube acceleration channel 8, and then realizes secondary acceleration through the tangential inlet plate 17, and then in the cyclone 10. Under the action of centrifugal force in the cyclone 10, due to the different densities of the different medium phases to achieve a separation, the lightest gas phase and the less oil-water phase first enter the sedimentation pot 901 through the air guide hole 9 and then through the exhaust pipe, relying on gravity, The gas phase is finally completely discharged through the exhaust port 401, and the remaining oil-water phase in the sedimentation pot is discharged into the first-level separation area 1 through the rubber diaphragm 903 at the bottom of the sedimentation pot 901; most of the lighter oil phase and part of the heavier phase are discharged. The water phase is also discharged into the primary separation zone 1 through the overflow pipe 16 and the overflow sub-duct 7; the oil-water mixture in the primary separation zone is separated by the high-performance oil-absorbing felt on CN208201821U to keep the oil phase in the primary separation zone. 1, when the oil phase stored in it reaches a certain height, it will be discharged to the outside of the tank through the primary oil discharge port 502 on the tank body, and the water phase will enter the secondary separation area 2 through the upper oil absorption film 11 and the upper baffle 12. Most of the remaining water phase and all sand phases in the cyclone and a small part of oil continue to separate in the cone section of the cyclone 10, and under the action of centrifugal force and gravity, the sand phase gathers to the outermost layer, It is discharged through the tangential sand outlet opened in the straight pipe section of the cyclone, and then discharged into the tertiary separation area 3 through the sand guiding pipe 13; most of the remaining water phase and a small part of the oil phase are directly It is discharged into the secondary separation area 2; the water phase discharged from the primary separation area and the underflow port of the cyclone are discharged to the secondary separation area, and the oil-water mixture is then passed through the CN208201821U high-performance oil-absorbing felt laid at the bottom of the secondary separation area to complete the second phase. After the second separation, the oil phase continues to be stored in the secondary separation zone 2. The water phase is discharged into the tertiary separation area 3 , and when the oil phase stored in the secondary separation area reaches a certain amount, it is discharged through the secondary oil outlet 503 opened on the separation tank 5 . The sand phase discharged through the sand guiding pipe 13 will first pass through the sand guiding table 603 in the process of entering the tertiary separation area, so as to avoid the impact and wear of the sediment on the lower cover 6, and then enter the sand chamber, and pass through the sand chamber. The water phase and sand phase discharged from the secondary separation area are settled by gravity in the tertiary separation area, the heaviest sand phase is settled in the bottom sand chamber, and the lighter water phase is placed on the sand phase. When the amount of water reaches a certain value, it will be discharged through the drain port 601 on the left.

The integrated gas-liquid-solid high-precision continuous separation device proposed by the present invention uses the spiral tube-type accelerating flow channel, the tangential inlet cyclone and the tangential inlet disc, which not only increases the inlet velocity of the mixed liquid, but also It also increases the inlet pressure, effectively increasing the cyclone separation efficiency. In addition, the design of the settling pot is added to the air guide pipe of the degassing part, which solves the problem that a small part of the liquid phase in the degassing process may block the degassing pipe, and the rubber diaphragm is installed under the settling pot. The key role of separating the oil-water mixture in the degassing pipeline. The separation device realizes the high-efficiency secondary separation of oil-water mixing by adding upper and lower layers of CN208201821U high-performance oil-absorbing felt. In terms of sand discharge, the device opens a number of tangential sand discharge ports at the straight pipe of the underflow of the cyclone to separate the separation area of the solid phase and the liquid phase, so as to prevent the sand phase from entering the secondary separation area to block the oil absorption film and prolong the The service life of the oil-absorbing film is shortened, and a semi-ellipsoidal sand guiding platform for dredging the sand phase is welded in the tertiary separation area, which not only plays the role of guiding the sediment into the sand chamber, but also prevents the sand from sealing the inner wall of the lower cap. The erosion extends the service mission of the lower cover.

Claims (1)

1. The integrated gas-liquid-solid continuous separation device has an upper cover (4), a separation tank body (5) and a lower cover (6). The appearance of the upper cover (4) is hemispherical, and a There is an exhaust port (401), the separation tank body (5) is a hollow cylinder, and a mixed liquid general inlet (501) is provided at the upper end of the right side of the separation tank body (5), on the left side of the separation tank body (5) The upper and lower ends of the tank are respectively provided with a primary oil outlet (502) and a secondary oil outlet (503). ; characterized by: An upper baffle holder (504) in the tank and a lower baffle holder (505) in the tank are respectively provided on the upper and lower sides of the separation tank body (5), wherein the lower baffle holder in the tank is opened with a Gap for easy access to the lower baffle (15); The upper baffle (12) and the lower baffle (15) are respectively placed in the upper baffle holder (504) in the tank and the lower baffle holder (505) in the tank; The separation device further comprises a tangential inlet cyclone (10), a helical tube acceleration flow channel (8) and an overflow conduit (7); Wherein, the upper end of the tangential inlet cyclone (10) is an overflow pipe (16) with an air guide channel in the middle with a cover, and a tangential inlet disc (16) is placed in the middle of the tangential inlet cyclone (10). 17), the lower end is the cyclone outer cylinder (18), and the three are connected together by long bolts; the upper baffle (12), the lower baffle (15), the upper oil absorption film (11) and the lower oil absorption film ( 14) Both are in the shape of a disc, and there are circular holes in the middle of the upper oil absorption film (11) and the upper baffle (12), which are used to fix the tangential inlet cyclone (10); the upper baffle (12) and the lower baffle (15) There are several small holes for draining the water phase after oil absorption and separation to increase the oil-water separation efficiency; The positioning hole corresponding to the sand guide pipe (13) is used to fix and seal the sand guide pipe; the upper oil absorption film (11) and the lower oil absorption film (14) are made of oleophilic water filter felt; the overflow pipe in the cyclone ( 16) A number of air inlet holes (1601) are provided at the upper and middle positions of the overflow pipe for the gas phase to enter, and the gas entering through the air inlet holes is then discharged into the air guide pipe through the air guide port (1602); in the cyclone A number of oil passage holes (1603) are opened at the bottom of the overflow pipe in the inner overflow pipe (16), and a layer of oleophilic water filter felt is wrapped around the oil passage hole, and enters the overflow through the oil passage hole (1603). Most of the oil phase and a small part of the water phase of the flow pipe are discharged into the overflow pipe through the overflow nozzle (1604) at the top; The structure of the tangential inlet disc (17) is a circular ring, and four evenly distributed and penetrating screw holes (1701) are opened on its upper end surface for fixing the tangential inlet disc in the tangential inlet cyclone (10). ); there are two tangential inlet grooves (1702) of the same size and evenly distributed at the upper end of the tangential inlet plate (17). To increase the tangential inlet velocity of the incoming liquid and provide sufficient pressure; The upper part of the cyclone outer cylinder (18) is provided with a tangential inlet (1801) and a chuck (1802) is arranged on the periphery of the cyclone cavity section. The chuck (1802) is fixed with the upper baffle (12) and supports the rotation. Outer cylinder of the cyclone; four tangential sand guide ports (1803) are opened on the bottom flow pipe located at the lower end of the outer cylinder of the cyclone, for discharging the sand phase inside the outer cylinder of the cyclone, Each of the four tangential sand outlets is connected with a flange (1804) for connecting with the sand guide pipe; the sand guide pipe (13) is a flanged elbow, and the sand guide pipe (13) passes through the upper method The blue plate (1301) is connected with the sand guide port (1803) of the outer cylinder of the cyclone, so as to realize the sand discharge in advance; The lower cover (6) is connected to the separation tank (5) through a large flange (601), and is provided with a sand discharge port (602) at the bottom and a drain port (603) on the left; 6) A sand guiding table (605) is welded inside through the support frame (604). The sand guiding table (605) is an inverted semi-ellipsoid, which is used to guide the sand falling from the sand guiding pipe into the sand chamber below. middle; The spiral tube accelerating flow channel (8) is in a spiral shape, and the diameter decreases continuously from top to bottom; the inlet of the spiral tube accelerating flow channel (8) is connected with the total inlet (501) of the mixed liquid, and the spiral tube accelerating flow channel The outlet of (8) is connected with the tangential inlet (1801) of the tangential inlet cyclone; the lower end of the overflow conduit (7) is provided with an equal-sized flange connected to the overflow pipe (16) in the cyclone (701), the two are connected to support and fix the overflow conduit; the oil and water separated by the cyclone enter the overflow conduit through the overflow pipe (16) in the cyclone, and then enter the overflow conduit along the flow path of the overflow conduit. overflow manifold (702); The air duct (9) has a left end flange (904), a settling pot (901) and an air outlet bell mouth (902). The bottom of the settling pot is composed of two semicircular rubber diaphragms (903); the air duct (9) The left end flange (904) is connected to the air guide port (1602) of the cyclone overflow pipe; the gas separated by the cyclone and a small amount of oil and water are discharged into the air guide pipe (9) through the air guide port (1602).

Images