CN111318058B

CN111318058B - Integrated gas-liquid-solid continuous separation device

Info

Publication number: CN111318058B
Application number: CN202010092604.9A
Authority: CN
Inventors: 邢雷; 蒋明虎; 赵立新; 李枫; 高金明; 张爽
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2021-07-27
Anticipated expiration: 2040-02-14
Also published as: CN111318058A

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 treatment device for oily sewage, which is applied to the fields of petroleum, chemical engineering, environmental protection and the like.

Background

With the continuous development of oil fields and the gradual increase of the water content of oil field produced liquid, the water content, sand content and gas content of oil field sewage gradually increase, and the sewage treatment cost also gradually increases. If the oily sewage is directly discharged without being treated, not only the soil and water source are polluted, but also the ecological system balance is damaged. The common oily sewage treatment methods mainly comprise settling separation, cyclone separation, filtering separation and the like, but the conventional separation methods have the defects of complex process, complicated system and difficulty in carrying, and most of the conventional separation methods have single separation medium, so that the increasingly developed requirements of the industry cannot be met. At present, in the aspect of research on gas-liquid-solid separation systems in China, a cyclone separator and a gas-liquid-solid separation system disclosed by patent CN 105779022B exist, but the great problems of the patent are that the separation process is complex, and the occupied area of facilities is large.

Disclosure of Invention

In order to solve the technical problems mentioned in the background technology, the invention provides an integrated gas-liquid-solid continuous separation device which separates different media in different areas to realize mutual noninterference separation; meanwhile, a membrane separation technology is added, so that multiple separation between oil and water is realized, and the defect of low separation efficiency of the existing cyclone is overcome. In addition, the separation device has simple structure and convenient disassembly and assembly, can complete the continuous separation of gas-liquid-solid multi-phase media in the same separator, and has higher separation efficiency and practicability.

The technical scheme of the invention is as follows: the integrated gas-liquid-solid continuous separation device is provided with an upper sealing cover, a separation tank body and a lower sealing cover, wherein the appearance shape of the upper sealing cover is hemispherical, an exhaust port is arranged at the top of the separation tank body, the separation tank body is a hollow cylinder, a mixed liquid main inlet is arranged at the upper end of the right side of the separation tank body, a first-stage oil outlet and a second-stage oil outlet are respectively arranged at the upper end and the lower end of the left side of the separation tank body, and the separation tank body is respectively fixedly connected with the upper sealing cover and the. It is characterized in that:

an upper baffle clamping seat in the tank and a lower baffle clamping seat in the tank are respectively arranged in the separating tank body from top to bottom, wherein the lower baffle clamping seat in the tank is provided with a notch at the opposite position, so that the lower baffle can be conveniently taken and placed.

The upper baffle and the lower baffle are respectively arranged in the upper baffle clamping seat and the lower baffle clamping seat in the tank.

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

The upper end of the tangential inlet cyclone is provided with an overflow pipe with a sealing cover and an air guide channel in the middle, the middle of the tangential inlet cyclone is provided with a tangential inlet disc, the lower end of the tangential inlet cyclone is provided with an outer cyclone cylinder, and the tangential inlet disc, the outer cyclone cylinder and the outer cyclone cylinder are connected together through a long bolt; the upper baffle, the lower baffle, the upper oil absorption film and the lower oil absorption film are all disc-shaped, and a circular hole is formed between the upper oil absorption film and the upper baffle and used for fixing the tangential inlet cyclone; the upper baffle and the lower baffle are both provided with a plurality of small holes for draining the water phase after oil absorption and separation, so that the oil-water separation efficiency is improved; the lower oil absorption film and the lower baffle are used for fixing and sealing the sand guide pipe by arranging four positioning holes corresponding to the sand guide pipe in the central area; the upper oil absorption film and the lower oil absorption film adopt oleophylic water filtration felts; a plurality of air inlets for air to enter are arranged at the middle upper position of the overflow pipe in the cyclone in the overflow pipeline, and the air entering through the air inlets enters the air guide pipe through the air guide port and is discharged; the most lower part of an overflow pipeline in an overflow pipe in the cyclone is provided with a plurality of oil passing holes, the periphery of each oil passing hole is wrapped with a layer of oleophylic water filtering felt, and most of oil phase and a small part of water phase entering the overflow pipeline through the oil passing holes are discharged into the overflow guide pipe through an overflow nozzle at the top.

The tangential inlet disc is in a ring shape, and four screw holes which are uniformly distributed and penetrate through are formed in the upper end face of the tangential inlet disc and used for fixing the position of the tangential inlet disc in the tangential inlet cyclone; the upper end of the tangential inlet disc is provided with two tangential inlet grooves which have the same size and are uniformly distributed, and the groove openings of the tangential inlet grooves are gradually reduced from outside to inside and are used for increasing the tangential inlet speed of incoming liquid and providing enough pressure.

The upper part of the outer cylinder of the cyclone is provided with a tangential inlet, the periphery of the cyclone cavity section is provided with a chuck, and the chuck and the upper baffle are fixed and support the outer cylinder of the cyclone; the bottom flow pipe at the lower end of the outer cylinder of the cyclone is provided with four tangential sand guide ports for discharging sand phase in the outer cylinder of the cyclone, and the four tangential sand outlets are respectively connected with a flange for connecting with the sand guide pipe; the sand guide pipe is a bent pipe with a flange, and is connected with a sand guide opening of the outer barrel of the cyclone through an upper flange plate, so that advanced sand discharge is realized.

The lower sealing cover is connected with the separation tank body through a large flange disc, a sand discharge port is arranged at the lowest part, and a water discharge port is arranged at the left side; the inside welding of lower closing cap has one through the support frame to lead the sand platform, leads the half ellipsoid shape of sand platform for it is leading-in to the sand setting chamber of below to lead to the sand that falls in the sand guide tube.

The spiral tube type accelerating flow passage is spiral and the diameter of the spiral tube type accelerating flow passage is continuously reduced from top to bottom; the inlet of the spiral tube type accelerating runner is connected with the mixed liquid main inlet, and the outlet of the spiral tube type accelerating runner is connected with the tangential inlet of the tangential inlet cyclone; the lower end of the overflow conduit is provided with an equal-size flange connected with an overflow pipe in the cyclone, and the equal-size flange and the overflow pipe are connected for supporting and fixing the overflow conduit; the oil and water after the cyclone separation enter the overflow conduit through an overflow pipe in the cyclone, and then enter the overflow branch conduit along a flow passage of the overflow conduit.

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

The invention has the following beneficial effects:

the device adopts multiple separation processes such as cyclone technology, gravity settling, membrane separation and the like to realize continuous separation of multiphase media; the equipment is simple in structure and small in size, most of the equipment is connected by flanges, and the equipment is convenient to disassemble and use; the spiral tube type accelerating flow channel is added at the front end of the tangential inlet cyclone to improve the tangential speed in the cyclone, and the spiral tube type accelerating flow channel is matched with a tangential inlet disc to increase the inlet pressure, so that the separation efficiency can be effectively improved; the mode of adopting the CN208201821U high-performance oil absorption felt is to realize the high-efficiency separation of oil and water, prolong the separation time of oil-water mixed liquid and improve the oil removal efficiency; by adding the sedimentation pot in the gas guide pipe, residual oil-water phase media in the gas guide pipe are effectively removed, the gas guide pipe is prevented from being blocked by oil-water phase, and the degassing efficiency is improved; the tangential sand discharge port and the sand guide pipe are arranged on the straight underflow pipe section of the cyclone, so that advanced sand discharge is realized, sand is prevented from blocking an oil absorption film in a secondary separation area, efficient separation of oil and water is realized, and the service life of the oil absorption film is prolonged; the sand guide table is additionally arranged to avoid erosion of silt to the sealing cover and prolong the service life of the sealing cover.

The device not only has the separation characteristics of the existing separation equipment, but also introduces a membrane separation method on the basis, and orderly combines the separation processes of degassing, oil separation, dewatering, sand removal and the like, thereby not only keeping the precision separation performance of the original separation equipment, but also realizing the processing capacity of multiple continuous separation, and simultaneously integrating all separators into a separation tank according to the arrangement mode from top to bottom and from inside to outside. Can be stably used in actual production, and realizes the high-precision continuous separation effect of gas-liquid-solid integration.

In conclusion, the separation device can be applied to the petrochemical industry, can also be popularized and applied in other fields such as metallurgy and water treatment, and has good development prospect.

Description of the drawings:

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

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

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

FIG. 4 is an exploded view of components within a tangential inlet cyclone.

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

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

FIG. 7 is an external view of the structure of the upper baffle and the oil sucking film.

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

Fig. 9 is an external view of a spiral tube type accelerating flow passage structure.

FIG. 10 is a view showing the appearance of an overflow pipe in a cyclone.

FIG. 11 is a semi-sectional view of an overflow tube in the cyclone.

FIG. 12 is a schematic view of the tangential inlet disk.

FIG. 13 is an external view structural view of a cyclone casing.

FIG. 14 is a semi-sectional view of the cyclone barrel.

Fig. 15 is a half sectional view of an overflow conduit.

Fig. 16 is an external structure view of the overflow duct.

FIG. 17 is a view showing the outer structure of the airway tube.

FIG. 18 is a cross-sectional view of an airway tube.

FIG. 19 is an external structure view of the sand guide pipe.

Fig. 20 is a view showing an appearance structure of the lower cover.

Fig. 21 is a half sectional view of the lower cap.

In the figure, 1-a first-stage separation area, 2-a second-stage separation area, 3-a third-stage separation area, 4-an upper sealing cover, 5-a separation tank body, 6-a lower sealing cover, 7-an overflow conduit, 8-a spiral pipe type accelerating flow channel, 9-a gas guide pipe, 10-a tangential inlet cyclone, 11-an upper oil absorption membrane, 12-an upper baffle plate, 13-a sand guide pipe, 14-a lower oil absorption membrane, 15-a lower baffle plate, 16-an overflow pipe, 17-a tangential inlet disc, 18-a cyclone outer cylinder, 401-an exhaust port, 501-a mixed liquid total inlet, 502-a first-stage oil outlet, 503-a second-stage oil outlet, 504-an upper baffle plate clamping seat, 505-a lower baffle plate clamping seat, 601-a lower sealing cover large flange disc, 602-a sand discharging port, 603-a water discharging port, 604-support frame, 605-sand guide table, 701-overflow guide pipe flange disc, 702-overflow branch guide pipe, 901-settling pot, 902-air outlet bell mouth, 903-rubber diaphragm, 904-air guide pipe flange, 1301-sand guide pipe flange disc, 1601-air inlet hole, 1602-air guide hole, 1603-oil passing hole, 1604-overflow nozzle, 1701-inlet disc fastening screw hole, 1702-tangential inlet groove, 1801-tangential inlet, 1802-swirler chuck, 1803-sand guide hole and 1804-sand guide hole flange.

The specific implementation mode is as follows:

the invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1 to 21, the integrated gas-liquid-solid high-precision continuous separation device comprises a primary separation region 1, a secondary separation region 2 and a tertiary separation region 3, wherein the three separation regions act sequentially through a separation tank body 5, the separation tank body 5 is substantially a hollow cylindrical section, a mixed liquid main inlet 501 is arranged at the upper end of the right side, a primary oil outlet 502 and a secondary oil outlet 503 are respectively arranged at the upper end and the lower end of the left side, a clamping seat is respectively arranged at the upper end and the lower end of the left side and used for fixing an upper baffle 504 and a lower baffle 505, a gap is formed in the opposite position of the lower clamping seat and used for conveniently taking and placing the lower baffle 15, and the whole separation tank body is respectively connected and fixed with an upper sealing cover 4 and a lower sealing cover 6 through flanges.

In the primary separation area 1, the upper end of the tangential inlet cyclone 10 is provided with an overflow pipe 16 with a sealing cover and an air guide channel in the middle, a tangential inlet disc 17 is placed in the middle, the lower end of the cyclone is provided with a cyclone outer cylinder 18, the tangential inlet disc and the cyclone outer cylinder are connected together through a long bolt, and primary separation is realized by media with different densities according to the cyclone separation principle under the action of centrifugal force. The structure appearance of the upper baffle 12, the lower baffle 15, the upper oil absorption film 11 and the oil absorption film 14 is disc-shaped, wherein a round hole is formed between the upper oil absorption film 11 and the upper baffle 12 and used for fixing a cyclone, a plurality of small holes are formed in the upper baffle and the lower baffle and used for draining water phase after oil absorption separation, the oil-water separation efficiency is increased, the lower oil absorption film 14 and the lower baffle 15 are used for fixing and sealing a sand guide pipe by forming four positioning holes corresponding to the sand guide pipe 13 in the central area, and the oil absorption film adopts a high-performance oil absorption felt given by the patent number CN 208201821U.

In the secondary separation area 2, the upper sealing cover 4 is hemispherical in appearance, is provided with an exhaust port 401 at the top, and is connected with the separation tank body 5 through a flange. The spiral tube type accelerating flow passage 8 is in a spiral shape with the diameter continuously reduced from top to bottom; it not only can provide acceleration for mixing the coming liquid through spiral acceleration and gravity acceleration, can also reduce the increase its entry pressure, reinforcing separation efficiency, and its connected mode is mainly fixed with the mixed liquid total entry 501 of the knockout drum body and the tangential entry 1801 of tangential entry swirler through the ring flange in entry and exit. The lower end of the overflow conduit 7 is provided with an equal-size flange plate 701 connected with an overflow pipe (16) in the cyclone, the equal-size flange plate and the equal-size flange plate are connected for supporting and fixing the overflow conduit, after cyclone separation, most of oil and a small part of water enter the overflow conduit through the overflow pipe and enter an overflow conduit-702 along a flow passage of the overflow conduit. And finally discharged into the primary separation zone 1 under the influence of gravity. The working principle of the air duct 9 part mainly depends on the air guide port 1602 to discharge the gas and a small part of oil water separated by the cyclone into the air duct, wherein most of the gas and a small part of the oil water are subjected to gravity separation again in the sedimentation pot 901 of the air duct, the gas of the light phase is discharged from the air outlet bell-mouthed opening 902 through a long and narrow pipeline, the oil water of the heavy phase is remained 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 water stored in the sedimentation pot reaches a certain amount, the oil water is discharged into a primary separation area through the gaps of the two rubber diaphragms, and when the oil water is exhausted, the rubber diaphragms can return to the original state due to the elasticity of the rubber diaphragms, and the bottom of the sedimentation pot is closed. The attachment and fixation of this part is mainly connected to the cyclone overflow duct pilot port 1602 by a flange 904 at its left end.

In the third-stage separation area 3, an overflow pipe 16 in the cyclone is welded with a cover plate to form a part, a plurality of air inlets 1601 for air to enter are arranged at the middle upper position of the overflow pipe, and the air entering from the air inlets enters an air guide pipe through an air guide port 1602 and is discharged; the most lower part of the overflow pipeline is provided with a plurality of larger oil passing holes 1603, the oil-water separation efficiency of the cyclone is ensured by wrapping the peripheries of the oil passing holes with a layer of oleophilic water filtering felt, and most of oil phase and a small part of water phase entering the overflow pipeline through the oil passing holes 1603 are discharged into the overflow conduit from an overflow nozzle 1604 at the top. The tangential inlet disk 17 is of generally circular ring-shaped configuration and is provided at its upper end face with four evenly distributed and penetrating screw holes 1701 for fixing the position of the tangential inlet disk in the cyclone vessel and at its upper end is further distributed with two equally sized and evenly distributed tangential inlet slots 1702 of decreasing slot opening from the outside to the inside for increasing the incoming liquid tangential inlet velocity and providing sufficient pressure. The cyclone outer cylinder 18 is a double tangential inlet double-cone cyclone, the upper part of which is provided with a tangential inlet 1801 and the periphery of the cyclone cavity section is provided with a chuck 1802, the cyclone outer cylinder is fixed and supported with an upper baffle 12, the bottom flow pipe at the lower end of the cyclone outer cylinder is provided with four tangential sand guide ports 1803 for discharging sand inside the cyclone outer cylinder, and the four tangential sand outlet ports are respectively connected with a flange 1804 for connecting with the sand guide pipe. The outer shape of the sand guide pipe 13 is a bent pipe with a flange, and the part is connected with a sand guide opening 1803 of the outer cylinder of the cyclone through an upper flange plate 1301, so that early sand discharge is realized. The lower sealing cover 6 is similar to the upper sealing cover in overall appearance and is roughly semi-spherical, is connected with the separation tank body 5 through a large flange plate 601, and is provided with a sand discharge port 602 at the lowest part and a water discharge port 603 at the left side; and the inside of this part has one through the welding of support frame 604 to lead sand platform 605, should lead the sand platform and place for half ellipsoid shape back-off form, mainly used lead into the sand setting chamber of below with the sand that falls in the sand guide tube in, play the cushioning effect simultaneously, avoid the grinding impact of sand relative lower closing cap wall, increase its life.

Fig. 2 is a whole sectional view thereof, the whole device is composed of a separation tank, a spiral tube type accelerating flow channel, a first-stage oil-gas-water sand rotational flow diversion section, a second-stage oil-water membrane separation section, a sand settling section and the like, and different space regions comprise a first-stage separation region 1, a second-stage separation region 2 and a third-stage separation region 3.

Fig. 3 is an exploded view of the structure of the integrated gas-liquid-solid high-precision continuous separation device, in which the components are sequentially composed of an upper sealing cover 4, a separation tank body 5, a lower sealing cover 6, an overflow conduit 7, a spiral tube type accelerating flow channel 8, a gas guide tube 9, a tangential inlet cyclone 10, an upper oil absorption membrane 11, an upper baffle plate 12, a sand guide tube 13, a lower oil absorption membrane 14, a lower baffle plate 15 and the like. The explosion diagram of the internal parts of the tangential inlet cyclone 7 is shown in figure 4, the upper end is provided with an overflow pipe 16 with a sealing cover, the middle part is provided with an air guide channel, the middle part is provided with a tangential inlet disc 17, the lower end is provided with a cyclone outer cylinder 18, and the tangential inlet disc, the air guide channel and the overflow pipe are connected together through a long bolt. According to the principle of cyclone separation, medium phases with different densities realize primary separation under the action of centrifugal force. Fig. 5 is a structural external view of the upper cover 4, which is shaped like a hemisphere, and is provided with a vent 401 at the top, and is connected with the separation tank 5 through a flange. Fig. 6 is a half sectional view of the separation tank 5, which is substantially a hollow cylindrical section, and has a mixed liquid inlet 501 at the upper end of the right side, a first-stage oil outlet 502 and a second-stage oil outlet 503 at the upper end and the lower end of the left side, respectively, and a clamping seat for fixing an upper baffle 504 and a lower baffle 505 at the upper end and the lower end of the middle part, respectively, wherein the lower clamping seat is opened with a gap at the opposite position for facilitating the taking and placing of the lower baffle 15, and the whole separation tank is connected and fixed with the upper sealing cover 4 and the lower sealing cover 6 through flanges, respectively. Fig. 7 and 8 are structural appearance diagrams of an upper baffle, a lower baffle and an upper oil absorption film and a lower oil absorption film respectively, the structural appearances of the upper baffle and the lower baffle are both disc-shaped, a round hole is formed in the middle of the upper oil absorption film and the upper baffle and used for fixing a cyclone, the upper baffle and the lower baffle are provided with a plurality of small holes and used for draining water phase after oil absorption separation and increasing oil-water separation efficiency, the lower oil absorption film and the lower baffle are provided with four positioning holes corresponding to sand guide pipes through the central area and used for fixing and sealing the sand guide pipes, and the oil absorption film mentioned herein adopts a high-performance oil absorption felt disclosed in patent number CN 208201821U. Fig. 9 is a structural appearance diagram of the spiral tube type accelerating flow channel 8, which is spiral with a diameter decreasing from top to bottom, and can accelerate the liquid mixture by spiral acceleration and gravity acceleration, increase the inlet pressure by reducing the diameter, and enhance the separation efficiency, and the connection mode is mainly fixed by the flange plates at the inlet and the outlet and the total mixed liquid inlet 501 of the separation tank and the tangential inlet 1801 of the tangential inlet cyclone. FIGS. 10 and 11 are a schematic view and a semi-sectional view of an overflow pipe 16 in a cyclone, which is formed as a unit by welding an overflow duct and a cover plate together, and a plurality of gas inlet holes 1601 for gas to enter are formed at an upper middle position of the overflow duct, and the gas entering from the gas inlet holes enters the gas guide tube through a gas guide hole 1602 and is discharged; the lowest part of the overflow pipeline is provided with a plurality of larger oil passing holes 1603, the periphery of the oil passing holes is coated with a layer of oleophilic water filtering felt to ensure the high efficiency of oil-water separation of the cyclone, and most of oil phase and a small part of water phase entering the overflow pipeline through the oil passing holes are discharged into the overflow conduit through an overflow nozzle 1604 at the top. Fig. 12 is a schematic view of the tangential inlet disk 17 in its outer configuration, which is generally circular and has four evenly distributed and penetrating screw holes in its upper end face for fixing the position of the tangential inlet disk in the cyclone, and two equally sized and evenly distributed tangential inlet slots 1701 in its upper end, which slots decrease from the outside to the inside, for increasing the tangential inlet velocity of incoming liquid and providing sufficient pressure. Fig. 13 and 14 are an external structural view and a half sectional view of the cyclone outer cylinder 18, respectively, the cyclone outer cylinder is a tangential inlet double-cone cyclone, the upper part of the cyclone outer cylinder is provided with a tangential inlet 1801, the periphery of the cyclone cavity section is provided with a chuck 1802, the cyclone outer cylinder is fixed with an upper baffle and supports the cyclone outer cylinder, the underflow pipe at the lower end of the cyclone outer cylinder is provided with four tangential sand guide openings 1803 for discharging sand inside the cyclone outer cylinder, and the four tangential sand outlet openings are respectively connected with a flange for connecting with the sand guide pipes. Fig. 15 and 16 are a half sectional view and an external structural view of the overflow conduit 7, respectively, and the lower end of the part is provided with an equal-size flange connected with an overflow pipe 16 in the cyclone, and the equal-size flange are connected to support and fix the overflow conduit, so that after cyclone separation, most of oil and a small part of water enter the overflow conduit through the overflow pipe and enter the overflow conduit 701 along a flow passage of the overflow conduit. And finally discharged into the primary separation zone under the action of gravity. Fig. 17 and fig. 18 are an external structural view and a half sectional view of the gas duct 9, respectively, the working principle of the component is mainly to discharge the gas and a small amount of oil and water separated by the cyclone into the gas duct by means of the gas guide port 1602, wherein most of the gas and a small amount of oil and water are again gravity separated in the settling pot 901 of the gas duct, the gas of the light phase is discharged from the gas outlet bell-mouthed opening 902 through a long and narrow pipeline, the oil and water of the heavy phase is left at the bottom of the settling pot, wherein the bottom of the settling pot is composed of two semicircular rubber diaphragms 903, when the oil and water stored in the settling pot reaches a certain amount, the oil and water will be discharged into the primary separation region through the gap between the two rubber diaphragms, and when the oil and water are discharged out, the rubber diaphragms will return to the original state due to their elasticity, and the bottom of the settling pot is closed. The attachment and fixation of this part is mainly connected to the cyclone overflow duct pilot port 1602 by a flange at its left end. Fig. 19 is an external structural view of a sand guide pipe 13, which is in the shape of a bent pipe with a flange and is connected with a sand guide opening 1803 of a swirler outer cylinder through an upper flange 1301 to realize early sand discharge. FIG. 20 is a view showing the configuration of the lower cover 6, which is similar to the upper cover in overall appearance and is substantially semi-spherical in shape, and is connected to the separation tank body through a large flange, and has a sand discharge port 602 at the lowermost part and a water discharge port 601 at the left side; fig. 21 is a half sectional view of the lower cover 6, and as seen in fig. 21, a sand guide table 603 is welded inside the component through a support frame, and the sand guide table is placed in a semi-ellipsoidal inverted buckle mode, is mainly used for guiding sand falling from a sand guide pipe into a sand settling chamber below, and simultaneously has a buffering effect, so that grinding impact of the sand on the wall surface of the lower cover is avoided, and the service life of the lower cover is prolonged.

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

the working principle of the invention is as follows: the invention relates to a separation device which jointly acts by multiple separation principles such as cyclone separation, gravity settling, membrane separation and the like. The mixed liquid enters the separation device through a mixed liquid main inlet of the separation device, enters a cyclone through a tangential inlet after passing through a spiral tube type acceleration runner, is secondarily accelerated through a tangential inlet disc, is subjected to centrifugal force in the cyclone, realizes primary separation due to different medium phase densities, firstly passes through a gas guide hole and then enters a settling kettle through an exhaust pipeline, and finally is completely discharged through an exhaust port by virtue of gravity, and residual oil-water phase in the settling kettle is discharged into a primary separation area through a rubber diaphragm at the bottom of the settling kettle; discharging most of the lighter oil phase and part of the heavier water phase into the first-stage separation region through the overflow pipe and the overflow branch pipe; the oil-water mixture in the primary separation area is separated by a high-performance oil absorption felt in CN208201821U to keep the oil phase in the primary separation area, when the oil phase stored in the oil-water mixture reaches a certain height, the oil phase is discharged out of the tank through a primary oil discharge port on the tank body, and the water phase enters a secondary separation area through the upper oil absorption film and the upper baffle. The most of the residual water phase and a small part of oil in the sand phase inside the cyclone are continuously separated in the conical section of the cyclone, the sand phase is gathered to the outermost layer under the action of centrifugal force and gravity, and the sand phase is discharged through a tangential sand outlet arranged on the straight pipe section of the cyclone and then discharged into a third-stage separation area through a sand guide pipe; most of the residual water phase and a small part of oil phase are directly discharged into a secondary separation area through a bottom flow port of the cyclone; and the water phase discharged from the primary separation area and the oil-water mixture discharged from the bottom flow port of the cyclone to the secondary separation area are subjected to secondary separation by a high-performance oil absorption felt laid at the bottom of the secondary separation area under CN208201821U, and the oil phase is continuously stored in the secondary separation area. And discharging the water phase into the third-stage separation area, and discharging the oil phase stored in the second-stage separation area after reaching a certain amount through a second-stage oil outlet formed in the separation tank. The sand phase discharged by the sand guide pipe can pass through the sand guide table in the process of entering the third-stage separation area to avoid impact abrasion of silt to the lower sealing cover and then enters the sand settling chamber, the water phase and the sand phase discharged by the second-stage separation area are settled by gravity in the third-stage separation area, the heaviest sand phase is settled in the sand settling chamber at the lowest layer, the lighter water phase is arranged on the sand phase, and the water phase is discharged through the water outlet at the left side when the water quantity reaches a certain value.

The working process of the invention is as follows:

the mixed liquid enters the separation device through a mixed liquid main inlet 501 of the separation device, enters a cyclone 10 through a tangential inlet after passing through a spiral tube type acceleration runner 8, is accelerated for the second time through a tangential inlet disc 17, is subjected to centrifugal force in the cyclone 10, realizes primary separation due to different medium phase densities, the lightest gas phase and less oil-water phase firstly enter a settling kettle 901 through an air guide hole 9 and then enter an exhaust pipeline, and are completely discharged through an exhaust port 401 by virtue of gravity, and the residual oil-water phase in the settling kettle is discharged into a primary separation area 1 through a rubber diaphragm 903 at the bottom of the settling kettle 901; the majority of the lighter oil phase and part of the heavier aqueous phase are also discharged to the primary separation zone 1 via overflow pipe 16 and overflow branch conduit 7; the oil-water mixture in the primary separation area is separated by the high-performance oil absorption felt in CN208201821U to keep the oil phase in the primary separation area 1, when the oil phase stored in the oil-water mixture reaches a certain height, the oil phase is discharged out of the tank through the primary oil discharge port 502 on the tank body, and the water phase enters the secondary separation area 2 through the upper oil absorption film 11 and the upper baffle 12. The most of the residual water phase and a small part of oil in the sand phase inside the cyclone are continuously separated in the conical section of the cyclone 10, the sand phase is gathered to the outermost layer under the action of centrifugal force and gravity, and the sand phase is discharged through a tangential sand outlet arranged on the straight pipe section of the cyclone and then discharged into the third-stage separation area 3 through a sand guide pipe 13; most of the residual water phase and a small part of oil phase are directly discharged into a secondary separation area 2 through a bottom flow port of the cyclone; the water phase discharged from the primary separation area and the oil-water mixture discharged from the bottom flow port of the cyclone to the secondary separation area are subjected to secondary separation by a high-performance oil absorption felt laid at the bottom of the secondary separation area under CN208201821U, and the oil phase is continuously stored in the secondary separation area 2. The water phase is discharged into the third-stage separation area 3, and when the oil phase stored in the second-stage separation area reaches a certain amount, the oil phase is discharged through a second-stage oil outlet 503 formed in the separation tank 5. The sand phase discharged through the sand guide pipe 13 passes through the sand guide table 603 in the process of entering the third-stage separation area to avoid impact abrasion of silt to the lower sealing cover 6, and then enters the sand settling chamber, the water phase and the sand phase discharged from the second-stage separation area settle by gravity in the third-stage separation area, the heaviest sand phase is settled in the sand settling chamber at the lowest layer, the lighter water phase is arranged on the sand phase, and the sand phase is discharged through the water outlet 601 at the left side when the water quantity reaches a certain value.

The integrated gas-liquid-solid high-precision continuous separation device provided by the invention has the advantages that the spiral tube type accelerating flow channel, the tangential inlet cyclone and the tangential inlet disc are matched for use, so that the inlet speed of mixed incoming liquid is increased, the inlet pressure of the mixed incoming liquid is enhanced, and the cyclone separation efficiency is effectively increased. And this device has installed the design of subsiding the kettle additional in degasification part's air duct, has solved the problem that the degasification pipeline may be blockked up to the liquid phase that few parts exist among the degasification process, has played the key effect of separating the oil water mixture among the degasification pipeline through subsiding the kettle below installation rubber diaphragm moreover. The separating device realizes the high-efficiency secondary separation of oil-water mixture by adding the upper and lower layers of CN208201821U high-performance oil absorbent felt. In the aspect of sand discharge, a plurality of tangential sand discharge ports are formed in the straight pipe of the underflow of the cyclone, a solid-phase separation region and a liquid-phase separation region are separated, sand phases are prevented from entering a secondary separation region to block an oil suction film, the service life of the oil suction film is prolonged, and a semi-ellipsoidal sand guide table for dredging the sand phases is welded in a tertiary separation region, so that the sand guide table not only plays a role of guiding silt to enter a sand setting cavity, but also avoids erosion of the sand relative to the inner wall of the lower sealing cover, and prolongs the service life of the lower sealing cover.

Claims

1. The integrated gas-liquid-solid continuous separation device is provided with an upper sealing cover (4), a separation tank body (5) and a lower sealing cover (6), wherein the upper sealing cover (4) is hemispherical in appearance, an exhaust port (401) is formed in the top of the upper sealing cover, the separation tank body (5) is a hollow cylinder, a mixed liquid main inlet (501) is formed in the upper end of the right side of the separation tank body (5), a primary oil outlet (502) and a secondary oil outlet (503) are formed in the upper end and the lower end of the left side of the separation tank body (5), and the separation tank body (5) is fixedly connected with the upper sealing cover (4) and the lower sealing cover (6) through flanges; the method is characterized in that:

an in-tank upper baffle clamping seat (504) and an in-tank lower baffle clamping seat (505) are respectively arranged in the separating tank body (5) from top to bottom, wherein the in-tank lower baffle clamping seat is provided with a notch at the opposite position, so that the lower baffle (15) can be conveniently taken and placed;

the upper baffle (12) and the lower baffle (15) are respectively arranged in an upper baffle clamping seat (504) and a lower baffle clamping seat (505) in the tank;

the separation device also comprises a tangential inlet cyclone (10), a spiral tube type accelerating flow passage (8) and an overflow conduit (7);

the upper end of the tangential inlet cyclone (10) is provided with an overflow pipe (16) with a sealing cover and an air guide channel in the middle, the middle of the tangential inlet cyclone (10) is provided with a tangential inlet disc (17), the lower end of the tangential inlet cyclone (10) is provided with a cyclone outer cylinder (18), and the tangential inlet disc, the tangential inlet disc and the cyclone outer cylinder are connected together through a long bolt; the upper baffle (12), the lower baffle (15), the upper oil absorption film (11) and the lower oil absorption film (14) are all disc-shaped, and a round hole is formed between the upper oil absorption film (11) and the upper baffle (12) and used for fixing the tangential inlet cyclone (10); the upper baffle (12) and the lower baffle (15) are both provided with a plurality of small holes for draining the water phase after oil absorption and separation, so that the oil-water separation efficiency is improved; the lower oil absorption film (14) and the lower baffle plate (15) are used for fixing and sealing the sand guide pipe by being provided with four positioning holes corresponding to the sand guide pipe (13) in the central area; the upper oil absorption film (11) and the lower oil absorption film (14) adopt oleophylic water filtration felts; a plurality of air inlets (1601) for air to enter are arranged at the middle upper position of the overflow pipe (16) in the cyclone, and the air entering through the air inlets enters the air guide pipe through the air guide port (1602) and is discharged; a plurality of oil passing holes (1603) are formed in the lowest part of an overflow pipeline in an overflow pipe (16) in the cyclone, a layer of oleophylic water filtering felt is wrapped on the periphery of each oil passing hole, and most of oil phase and a small part of water phase entering the overflow pipeline through the oil passing holes (1603) are discharged into an overflow guide pipe through an overflow nozzle (1604) at the top;

the tangential inlet disc (17) is in a ring shape, and the upper end surface of the tangential inlet disc is provided with four screw holes (1701) which are uniformly distributed and penetrate through for fixing the position of the tangential inlet disc in the tangential inlet cyclone (10); the upper end of the tangential inlet disc (17) is provided with two tangential inlet grooves (1702) which have the same size and are uniformly distributed, and the notches of the tangential inlet grooves (1702) are gradually reduced from outside to inside so as to increase the tangential inlet speed of incoming liquid and provide sufficient pressure;

the upper part of the outer cylinder (18) of the cyclone is provided with a tangential inlet (1801), the periphery of the cyclone cavity section is provided with a chuck (1802), and the chuck (1802) and the upper baffle plate (12) are fixed and support the outer cylinder of the cyclone; four tangential sand guiding ports (1803) are formed in the bottom flow pipe at the lower end of the outer cylinder of the cyclone and used for discharging sand phases in the outer cylinder of the cyclone, and a flange (1804) is connected to each of the four tangential sand outlets and used for being connected with the sand guiding pipe; the sand guide pipe (13) is a bent pipe with a flange, and the sand guide pipe (13) is connected with a sand guide opening (1803) of the outer barrel of the cyclone through an upper flange plate (1301) to realize early sand discharge;

the lower sealing cover (6) is connected with the separation tank body (5) through a large flange plate (601), a sand discharge port (602) is arranged at the lowest part, and a water discharge port (603) is arranged at the left side; a sand guide table (605) is welded in the lower sealing cover (6) through a support frame (604), and the sand guide table (605) is in an inverted semi-ellipsoidal shape and is used for guiding sand falling from the sand guide pipe into a sand setting cavity below;

the spiral tube type accelerating flow passage (8) is spiral and the diameter is continuously reduced from top to bottom; the inlet of the spiral tube type accelerating flow channel (8) is connected with the mixed liquid main inlet (501), and the outlet of the spiral tube type accelerating flow channel (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-size flange plate (701) connected with an overflow pipe (16) in the cyclone, and the equal-size flange plate are connected for supporting and fixing the overflow conduit; the oil and the water after the cyclone separation enter an overflow conduit through an overflow pipe (16) in the cyclone and then enter an overflow branch conduit (702) along a flow passage of the overflow conduit;

the air duct (9) is provided with a left end flange (904), a sedimentation pot (901) and an air outlet bell mouth (902), and the bottom of the sedimentation pot is composed of two semicircular rubber diaphragms (903); the air duct (9) is connected with an air guide port (1602) of an overflow pipe of the cyclone through a left end flange (904); the gas and a small part of oil water separated by the cyclone are discharged into the gas guide pipe (9) through the gas guide opening (1602).