Three-phase separation sewage filtering device for oil exploitation

Abstract

The invention discloses a three-phase separation sewage filtering device for petroleum exploitation, and relates to the technical field of petroleum and natural gas treatment equipment, the three-phase separation sewage filtering device comprises a treatment tank body, a distribution mechanism is mounted on the inner side of the treatment tank body, and a driving mechanism is mounted below the distribution mechanism. According to the three-phase separation sewage filtering device for oil exploitation, a plurality of multi-fiber filtering balls can be uniformly distributed, and the multi-fiber filtering balls are ensured to be distributed in a cavity between a one-way filtering disc and a pressing disc in a matrix shape, so that each corner of semi-sewage entering the cavity can be fully filtered by the multi-fiber filtering balls, and filtering dead angles are avoided; the efficient filtration of the multi-fiber filter ball on half sewage is realized; a second hydraulic cylinder drives a connecting plate to extend and retract, so that the combining efficiency of suspended solids in the semi-clear water and an organic polymer flocculant can be improved, and the sewage purification efficiency of the treatment tank body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum and natural gas processing equipment, and in particular to a three-phase separation sewage filtering device used in petroleum mining. Background Art

[0002] The three-phase separation involved in oil production refers to the oil-gas-water three-phase separator, which is one of the commonly used equipment in the process of oil field development and production. It is a "solid, liquid, gas" three-phase separation device installed under the pump in the oil field or oil-water well; the oil-gas-water mixture enters the pre-degassing chamber at high speed, and a large amount of crude oil associated gas is removed by cyclone separation and gravity. The pre-degassed oil-water mixture enters the distributor and water washing chamber at high speed through the guide pipe, and is washed and demulsified in the active water layer containing demulsifier, and the flow is stabilized to reduce the Reynolds coefficient of the incoming liquid. After coalescence and rectification, it flows into the sedimentation separation chamber for further sedimentation and separation. The degassed crude oil turns over the partition into the oil chamber, and is measured by the flow meter. After control, it flows out of the separator, and the water phase enters the water chamber through the conduit by pressure balance, thereby achieving the purpose of oil-gas-water three-phase separation.

[0003] The existing Chinese invention patent publication number CN104326588A proposes a device with the function of improving the filtering efficiency of petroleum wastewater. In the scheme of the invention, the outer cylinder is provided with an internal hollow tank body, and a one-way filter disc and a pressure plate are provided in the tank body. The one-way filter disc is arranged directly above the pressure plate, and a filter ball is provided between the one-way filter disc and the pressure plate. A guide sleeve is provided between the one-way filter disc and the pressure plate, and the top end of the guide sleeve is fixed to the bottom end of the one-way filter disc. Although the scheme of the invention can separate petroleum from sewage, it only separates sewage from petroleum separately and performs a simple filtering treatment. The filtering method for water is single, and the sundries and oil adsorbed in the filter ball cannot be effectively discharged, and the high-efficiency filtering effect of the filter ball on sewage cannot be guaranteed. In addition, there is a hidden danger that the sundries and oil in the semi-clear water in the filter cavity cannot be fully filtered locally, which seriously affects the filtering efficiency of water in the filter cavity. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a three-phase separation sewage filtering device for petroleum mining, comprising a processing tank body, a distribution mechanism is installed inside the processing tank body, a driving mechanism is installed below the distribution mechanism, the driving mechanism is threadedly installed at the middle position of the bottom of the processing tank body, and a horizontal three-phase separation tank is installed on the left side of the processing tank body;

[0005] The treatment tank body comprises a shell, and a one-way filter disc, a pressure disc, a fiberboard and an inner concave body are arranged inside the treatment tank body, and are arranged in sequence from top to bottom, and the outer walls of the one-way filter disc and the fiberboard are seamlessly connected to the inner wall of the shell, the outer wall of the pressure disc is in seamless contact with the inner wall of the shell, and the pressure disc can move vertically along the inner wall of the shell; the cross-sectional shapes of the one-way filter disc, the pressure disc and the fiberboard are all landslide-shaped, and the lowest points are all located on the left side of the shell;

[0006] The distribution mechanism includes a first hydraulic cylinder, the top thread of which is installed on the outer top of the shell, and an elastic rope is fixedly connected to the bottom of the one-way filter disc, and multi-fiber filter balls are evenly connected to the elastic rope, and the multi-fiber filter balls are installed between the one-way filter disc and the pressure plate by the elastic rope.

[0007] Preferably, the pressure plate is provided with filter holes, the fiberboard is made of chemically synthesized oil-absorbing fibers, and water-permeable pores are opened on the fiberboard to accelerate water permeation, and the middle part of the inner concave body is recessed into the shell.

[0008] Preferably, an oil pipe, a float pipe and a drain pipe are fixedly connected to one side of the outer surface of the shell, and a backwash pipe and a feed pipe are fixedly connected to the other side of the outer surface of the shell. The oil pipe is arranged above the pressure plate through the shell, and the float pipe is arranged above the fiberboard through the shell. The drain pipe is used to discharge clean water, and the feed pipe is used to transport organic polymer flocculant to the chamber between the pressure plate and the fiberboard.

[0009] Preferably, a net bag plate is telescopically installed at the bottom of the first hydraulic cylinder, and the net bag plate is fitted above the pressure plate through the first hydraulic cylinder. A plurality of rope knots are fixedly installed on the edges of the net bag plate, and the bottom of the elastic rope is fixedly connected to the rope knots. A plurality of water-permeable holes are provided on the net bag plate for filtering out water, and a dumping inclined opening is provided on the left side of the net bag plate.

[0010] Preferably, the driving mechanism includes a second hydraulic cylinder, a side plate is fixedly connected to the surface of the second hydraulic cylinder, the side plate is threadedly connected to the inner wall of the inner concave body, a telescopic rod is provided on the top of the second hydraulic cylinder, the top of the telescopic rod passes through the inner concave body and is threadedly connected to a connecting plate, and a scraper hole is provided on the surface of the connecting plate for stirring the sewage between the pressure plate and the fiberboard.

[0011] Preferably, a sleeve is provided above the connecting plate, the sleeve is arranged between the one-way filter disc and the pressure plate, and the top end of the sleeve is fixed to the bottom end of the one-way filter disc, a guide shaft is provided in the sleeve, and the bottom end of the guide shaft passes through the pressure plate and is arranged below the pressure plate.

[0012] Preferably, the outer wall of the guide shaft is concave to form an annular groove, the pressure plate is fitted on the outer wall of the annular groove, and the length of the annular groove is greater than the thickness of the annular groove, and the annular groove can move in a vertical direction in the annular groove along the outer wall of the annular groove.

[0013] Preferably, the horizontal three-phase separation tank includes a horizontal tank, a sewage discharge pipe is fixedly connected to the right bottom of the horizontal tank, a water pump is installed on the sewage discharge pipe, the output end of the water pump is connected to the top of the shell for introducing sewage, and the bottom of the horizontal tank is fixedly connected to a sewage discharge pipe, and an oil outlet pipe is fixedly connected to the bottom side wall of the horizontal tank.

[0014] Preferably, a pressure gauge is threadedly installed on the top of the horizontal tank near the right side, which is used to detect the air pressure inside the horizontal tank; an oil, gas and water inlet pipe is fixedly connected to the left side of the horizontal tank, which is used to input oil, gas and water into the horizontal tank; a gas outlet pipe is fixedly connected to the right side of the horizontal tank at a position symmetrical to the oil, gas and water inlet pipe, which is used to export the separated gas; an inlet separator is threadedly installed at the position where the oil, gas and water inlet pipe is connected to the interior of the horizontal tank, which can preliminarily separate the liquid and the gas.

[0015] Preferably, a rectifier plate is installed on the inner side of the horizontal tank and on the right side of the inlet separator, and a defoamer is fixedly installed on the inner side of the horizontal tank and on the right side of the rectifier plate to further purify the gas; an oil-water baffle is fixedly connected to the inner side of the horizontal tank and below the rectifier plate, and an oil pool is fixedly connected to the right side of the oil-water baffle, a notch is provided on the left side of the oil pool, and the height of the notch is level with the top of the oil-water baffle, and the oil outlet pipe passes through the horizontal tank and is connected to the bottom of the oil pool.

[0016] The present invention provides a three-phase separation sewage filtering device for oil mining, which has the following beneficial effects:

[0017] 1. The oil mining adopts a three-phase separation sewage filtration device. When the net bag plate is extended and hoisted to the top of the pressure plate through the downward extension of the first hydraulic cylinder, multiple multi-fiber filter balls can be evenly arranged under the tension of the elastic rope, ensuring that the fiber filter balls are arranged in a matrix in the chamber between the one-way filter plate and the pressure plate, so that the multi-fiber filter balls can fully filter every corner of the semi-sewage entering the chamber, avoiding the occurrence of filtering dead corners, and realizing the multi-fiber filter balls. Efficient filtration of semi-sewage.

[0018] 2. The oil mining adopts a three-phase separation sewage filtering device, which contracts the first hydraulic cylinder upward and utilizes the squeezing force generated by the net bag plate approaching the bottom of the one-way filter disc to squeeze out some of the debris and oil absorbed in the multi-fiber filter ball, and guides them to the lowest point on the left side of the pressure plate through the tilted opening on the left side of the net bag plate, and finally discharges them through the float pipe, and then combines with the backwash pipe to backwash the inner cavity of the shell, without disassembling the shell, the multi-fiber filter ball can be cleaned. After cleaning, by extending the first hydraulic cylinder downward again, the multi-fiber filter ball can achieve the repeated adsorption and purification function of semi-sewage, so that the multi-fiber filter ball can always be in a highly efficient purification state of semi-sewage, and combined with the embodiments and, finally realizes the layer-by-layer purification of sewage by the treatment tank, so that the clean water finally discharged through the drain pipe can directly participate in the water cycle and be recycled.

[0019] 3. The oil mining adopts a three-phase separation sewage filtration device. When the second hydraulic cylinder drives the connecting plate to extend and retract, the scraping holes on the surface of the connecting plate can be used to locally stir the semi-clean water, increase the local flow rate of the semi-clean water, and enable the semi-clean water and the organic polymer flocculant to mix quickly, accelerate the combination efficiency of the suspended solids in the semi-clean water and the organic polymer flocculant, and realize the rapid purification of the semi-clean water; improve the purification efficiency of the treatment tank for sewage.

[0020] 4. The oil mining adopts a three-phase separation sewage filtration device. After staying for a period of time, the clean water in the chamber between the fiberboard and the inner concave body is allowed to settle statically, and then the clean water is discharged from the drain pipe for use, ensuring the safe recycling and use of the water cycle and ensuring that the sewage is thoroughly purified. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the external structure of a three-phase separation sewage filtering device for oil mining according to the present invention;

[0022] Figure 2 It is a structural schematic diagram of the processing tank and the driving mechanism of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the processing tank body of the present invention;

[0024] Figure 4 is a structural schematic diagram of the second hydraulic cylinder of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the distribution mechanism of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the connecting plate of the present invention;

[0027] Figure 7 It is a schematic diagram of the internal structure of the horizontal tank of the present invention.

[0028] In the figure: 1. treatment tank; 101. shell; 102. one-way filter plate; 103. pressure plate; 104. fiberboard; 105. inner concave body; 106. oil pipe; 107. floating pipe; 108. drainage pipe; 109. backwash pipe; 2. distribution mechanism; 201. net bag plate; 202. first hydraulic cylinder; 203. rope knot; 204. elastic rope; 205. multi-fiber filter ball; 3. driving mechanism; 301. Second hydraulic cylinder; 302. Side plate; 303. Telescopic rod; 304. Connecting plate; 305. Guide shaft; 306. Annular groove; 307. Sleeve; 4. Horizontal tank; 5. Sewage pipe; 6. Sewage pipe; 7. Oil outlet pipe; 8. Pressure gauge; 9. Inlet separator; 10. Rectifier plate; 11. Defoamer; 12. Oil-water baffle; 13. Oil pool; 14. Oil, gas and water inlet pipe; 15. Gas outlet pipe. DETAILED DESCRIPTION

[0029] Example 1

[0030] Reference Figures 1 to 7 As shown, the present invention provides a technical solution: a three-phase separation sewage filtering device for petroleum mining, comprising a treatment tank body 1, a distribution mechanism 2 is installed inside the treatment tank body 1, a driving mechanism 3 is installed below the distribution mechanism 2, the driving mechanism 3 is threadedly installed at the middle position of the bottom of the treatment tank body 1, and a horizontal three-phase separation tank is installed on the left side of the treatment tank body 1;

[0031] The treatment tank body 1 comprises a shell 101, and a one-way filter disc 102, a pressure disc 103, a fiberboard 104 and an inner concave body 105 are arranged inside the treatment tank body 1, and are arranged in sequence from top to bottom, and the outer walls of the one-way filter disc 102 and the fiberboard 104 are seamlessly connected to the inner wall of the shell 101, and the outer wall of the pressure disc 103 is in seamless contact with the inner wall of the shell 101, and the pressure disc 103 can move vertically along the inner wall of the shell 101; the cross-sectional shapes of the one-way filter disc 102, the pressure disc 103 and the fiberboard 104 are all landslide-shaped, and the lowest points are all located on the left side of the shell 101;

[0032] The distribution mechanism 2 includes a first hydraulic cylinder 202, the top of which is threadedly mounted on the outer top of the housing 101, an elastic rope 204 is fixedly connected to the bottom of the one-way filter disc 102, and multi-fiber filter balls 205 are evenly spacedly connected to the elastic rope 204, and the multi-fiber filter balls 205 are elastically mounted between the one-way filter disc 102 and the pressure disc 103 through the elastic rope 204;

[0033] The horizontal three-phase separation tank includes a horizontal tank 4, a sewage discharge pipe 5 is fixedly connected to the bottom of the right side of the horizontal tank 4, the sewage discharge pipe 5 extends into the interior of the horizontal tank 4 and is installed with an oil-water interface regulator, a drainage valve is installed inside the sewage discharge pipe 5, a water pump is installed on the sewage discharge pipe 5, the output end of the water pump is connected to the top of the shell 101, and is used to introduce sewage, and a sewage discharge pipe 6 and an oil outlet pipe 7 fixedly connected to the bottom side wall of the horizontal tank 4 are fixedly connected to the bottom of the horizontal tank 4, and an oil drain valve is arranged inside the oil outlet pipe 7; a pressure gauge 8 is installed on the top of the horizontal tank 4 near the right side thread, which is used to detect the air pressure inside the horizontal tank 4; an oil, gas and water inlet pipe 14 is fixedly connected to the left side of the horizontal tank 4, which is used to input oil, gas and water into the horizontal tank 4; a gas outlet pipe 15 is fixedly connected to the right side of the horizontal tank 4 at a position symmetrical to the oil, gas and water inlet pipe 14, which is used to guide The separated gas comes out; the inlet separator 9 is threadedly installed at the position where the oil, gas and water inlet pipe 14 is connected to the inside of the horizontal tank 4, which can initially separate the liquid and the gas; a rectifier plate 10 is installed on the inside of the horizontal tank 4 and on the right side of the inlet separator 9, and a defoamer 11 is fixedly installed on the inside of the horizontal tank 4 and on the right side of the rectifier plate 10 to further purify the gas; an oil-water baffle 12 is fixedly connected to the inside of the horizontal tank 4 and below the rectifier plate 10, and an oil pool 13 is fixedly connected to the right side of the oil-water baffle 12, and a float-type liquid level regulator is hoisted in the oil pool 13, and the top of the float-type liquid level regulator is fixedly installed on the top of the inner wall of the horizontal tank 4; a notch is provided on the left side of the oil pool 13, and the height of the notch is level with the top of the oil-water baffle 12, and the oil outlet pipe 7 passes through the horizontal tank 4 and is connected with the bottom of the oil pool 13.

[0034] During use, when the formation fluid enters the horizontal tank 4 through the oil, gas and water inlet pipe 14, it first encounters the inlet separator 9, which causes the liquid and gas to be initially separated. The gas carrying a large number of droplets is further separated by the rectifier 10, and then passes through the defoamer 11 to be further purified, so that it becomes dry gas and is discharged from the gas outlet pipe 15. An air control valve is provided on the pressure gauge 8 to control the gas discharge amount to maintain the required pressure in the container; under the action of gravity, due to the difference in oil and water density, free water sinks to the bottom of the horizontal tank 4, and the oil floats to the top and climbs over the oil-water baffle 12 into the oil pool 13. The float-type liquid level controller controls the crude oil discharge amount by operating the oil drain valve inside the oil outlet pipe 7 to maintain the stability of the oil level; the separated free water is discharged through the drain valve operated by the oil-water interface controller to maintain the stability of the oil-water interface; through the above operations, the separation function of the horizontal tank 4 for the three phases of oil, gas and water is realized.

[0035] Example 2

[0036] Reference Figures 1 to 7 As shown, it includes a processing tank body 1, a distribution mechanism 2 is installed inside the processing tank body 1, a driving mechanism 3 is installed below the distribution mechanism 2, the driving mechanism 3 is threadedly installed at the middle position of the bottom of the processing tank body 1, and a horizontal three-phase separation tank is installed on the left side of the processing tank body 1;

[0037] The treatment tank body 1 comprises a shell 101, and a one-way filter disc 102, a pressure disc 103, a fiberboard 104 and an inner concave body 105 are arranged inside the treatment tank body 1, and the outer walls of the one-way filter disc 102 and the fiberboard 104 are seamlessly connected to the inner wall of the shell 101, wherein the one-way filter disc 102 can only filter in one direction and will not reversely penetrate into the chamber between the shell 101 and the one-way filter disc 102, so that the filtering efficiency is high; the outer wall of the pressure disc 103 and the inner wall of the one-way filter disc 104 are connected to the inner wall of the shell 101, and the one-way filter disc 102 is connected to the inner wall of the one-way filter disc 102, and the one-way filter disc 102 is ... The inner wall of the shell 101 is in seamless contact, and the pressure plate 103 can move vertically along the inner wall of the shell 101; the cross-sectional shapes of the one-way filter disc 102, the pressure plate 103, and the fiberboard 104 are all landslide-shaped, and the lowest points are all located on the left side of the shell 101. A flushing pipe is fixedly connected to the outer surface of the shell 101 near the top. The flushing pipe is located directly below the sewage pipe 5, and the flushing pipe extends to the inner side of the shell 101 and is located at the bottom of the left side of the one-way filter disc 102;

[0038] The distribution mechanism 2 includes a first hydraulic cylinder 202, the top of which is threadedly mounted on the outer top of the housing 101, an elastic rope 204 is fixedly connected to the bottom of the one-way filter disc 102, and multi-fiber filter balls 205 are evenly spacedly connected to the elastic rope 204, and the multi-fiber filter balls 205 are elastically mounted between the one-way filter disc 102 and the pressure disc 103 through the elastic rope 204;

[0039] The pressure plate 103 is provided with filter holes, and the fiberboard 104 is made of chemically synthesized oil-absorbing fibers. The fiberboard 104 is used to perform the final adsorption and interception of the dispersed oil remaining in the semi-clear water, and the semi-clear water is thoroughly deoiled; and the fiberboard 104 is provided with water-permeable pores for accelerating water permeation, and the middle part of the inner concave body 105 is recessed into the shell 101; an oil and dirt pipe 106, a floating pipe 107 and a drain pipe 108 are fixedly connected to one side of the outer surface of the shell 101, and a backwash pipe 109 and a feed pipe are fixedly connected to the other side of the outer surface of the shell 101. The oil and dirt pipe 106 is arranged above the pressure plate 103 through the shell 101, and the floating pipe 107 is arranged above the fiberboard 104 through the shell 101. The drain pipe 108 is used to discharge clean water, and the feed pipe is used to transport organic polymer flocculants to the chamber between the pressure plate 103 and the fiberboard 104.

[0040] When in use, after the sewage is sent into the treatment tank body 1 through the sewage discharge pipe 5, the sewage to be filtered enters the treatment tank body 1 and waits for filtration in the chamber between the shell 101 and the one-way filter disc 102; through the filtration of the one-way filter disc 4, the sewage enters the chamber between the one-way filter disc 102 and the pressure plate 103 and becomes semi-sewage, and the sundries and oil are adsorbed by the multi-fiber filter ball 205; under the action of the self-weight of the semi-sewage, the pressure plate 103 slides down along the annular groove 306, so that the chamber space between the one-way filter disc 102 and the pressure plate 103 is enlarged, and the semi-sewage gradually passes through the pressure plate 103 to become semi-clear water. When it reaches the bottom of the annular groove 306 and can no longer slide down, the second hydraulic cylinder 301 is activated to push the pressure plate 103 upward for squeezing, and the semi-waste water is further filtered out and filtered into semi-clear water. When the semi-clear water between the pressure plate 103 and the fiberboard 104 accumulates to a certain volume, an organic polymer flocculant is added through the feed pipe to perform flotation filtration on the semi-clear water. The oil droplets are attached to microbubbles in the water to increase the buoyancy and float up for separation. This is used to treat the dispersed oil, emulsified oil and fine suspended solids remaining in the semi-clear water that are difficult to remove by natural floating by gravity separation, and further filter the semi-clear water.

[0041] By connecting the clean water pipe to the backwash pipe 109, the inside of the shell 101 is cleaned from bottom to top, the cleaning water is discharged from the flushing pipe, and the suspended matter accumulated on the fiberboard 104 is flushed out by the floating pipe 107, so that the shell 101 is cleaned, so that the inside of the treatment tank 1 will not be blocked, and the inside of the system is kept clean when not in use;

[0042] After the semi-clean water is filtered through the fiberboard 104 and into the chamber between the fiberboard 104 and the inner concave body 105, it can also stay for a period of time to allow the clean water in the chamber between the fiberboard 104 and the inner concave body 105 to settle statically, and then be discharged from the drain pipe 108 for use, thereby ensuring the safe recycling and use of the water cycle and ensuring that the sewage is thoroughly purified.

[0043] Example 3

[0044] Reference Figures 1 to 7 As shown, it includes a processing tank body 1, a distribution mechanism 2 is installed inside the processing tank body 1, a driving mechanism 3 is installed below the distribution mechanism 2, the driving mechanism 3 is threadedly installed at the middle position of the bottom of the processing tank body 1, and a horizontal three-phase separation tank is installed on the left side of the processing tank body 1;

[0045] The treatment tank body 1 comprises a shell 101, and a one-way filter disc 102, a pressure disc 103, a fiberboard 104 and an inner concave body 105 are arranged inside the treatment tank body 1, and are arranged in sequence from top to bottom, and the outer walls of the one-way filter disc 102 and the fiberboard 104 are seamlessly connected to the inner wall of the shell 101, and the outer wall of the pressure disc 103 is in seamless contact with the inner wall of the shell 101, and the pressure disc 103 can move vertically along the inner wall of the shell 101; the cross-sectional shapes of the one-way filter disc 102, the pressure disc 103 and the fiberboard 104 are all landslide-shaped, and the lowest points are all located on the left side of the shell 101;

[0046] The distribution mechanism 2 includes a first hydraulic cylinder 202, the top thread of the first hydraulic cylinder 202 is installed on the outer top of the shell 101, and the bottom of the one-way filter disc 102 is fixedly connected with an elastic rope 204, and multi-fiber filter balls 205 are evenly connected to the elastic rope 204, and the multi-fiber filter balls 205 are elastically installed between the one-way filter disc 102 and the pressure plate 103 through the elastic rope 204; the bottom of the first hydraulic cylinder 202 is telescopically installed with a net bag plate 201, and the net bag plate 201 is fitted above the pressure plate 103 through the first hydraulic cylinder 202, and a plurality of knot parts 203 are fixedly installed on the edge of the net bag plate 201, and the bottom of the elastic rope 204 is fixedly connected in the knot part 203, wherein a plurality of water permeable holes are opened on the net bag plate 201 for filtering out water, and a dumping inclined opening is opened on the left side of the net bag plate 201.

[0047] When in use, the first hydraulic cylinder 202 is extended downward to extend the net bag plate 201 to be hoisted just above the pressure plate 103. Under the tension of the elastic rope 204, multiple multi-fiber filter balls 205 can be evenly arranged to ensure that the fiber filter balls 205 are arranged in a matrix in the chamber between the one-way filter plate 102 and the pressure plate 103, so that the multi-fiber filter balls 205 can fully filter every corner of the semi-sewage entering the chamber, avoiding the occurrence of filtering dead corners, and achieving efficient filtration of the semi-sewage by the multi-fiber filter balls 205;

[0048] At the same time, the first hydraulic cylinder 202 can also be retracted upward, and the squeezing force generated by the net bag plate 201 approaching the bottom of the one-way filter disc 102 can be used to squeeze out some of the debris and oil absorbed in the multi-fiber filter ball 205, and guided to the lowest point on the left side of the pressure plate 103 through the tilting bevel on the left side of the net bag plate 201, and finally discharged from the float pipe 107, and then combined with the backwash pipe 109 to backwash the inner cavity of the shell 101, the multi-fiber filter ball 205 can be cleaned without disassembling the shell 101. After cleaning, the first hydraulic cylinder 202 can be extended downward again to realize the repeated adsorption and purification function of the multi-fiber filter ball 205 on the semi-sewage, so that the multi-fiber filter ball 205 can always be in a highly efficient purification state of the semi-sewage, and combined with Examples 2 and 4, the treatment tank 1 can finally achieve layer-by-layer purification of the sewage, so that the clean water finally discharged through the drain pipe 108 can directly participate in the water cycle and be recycled;

[0049] Example 4

[0050] Reference Figures 1 to 7 As shown, it includes a processing tank body 1, a distribution mechanism 2 is installed inside the processing tank body 1, a driving mechanism 3 is installed below the distribution mechanism 2, the driving mechanism 3 is threadedly installed at the middle position of the bottom of the processing tank body 1, and a horizontal three-phase separation tank is installed on the left side of the processing tank body 1;

[0051] The treatment tank body 1 comprises a shell 101, and a one-way filter disc 102, a pressure disc 103, a fiberboard 104 and an inner concave body 105 are arranged inside the treatment tank body 1, and are arranged in sequence from top to bottom, and the outer walls of the one-way filter disc 102 and the fiberboard 104 are seamlessly connected to the inner wall of the shell 101, and the outer wall of the pressure disc 103 is in seamless contact with the inner wall of the shell 101, and the pressure disc 103 can move vertically along the inner wall of the shell 101; the cross-sectional shapes of the one-way filter disc 102, the pressure disc 103 and the fiberboard 104 are all landslide-shaped, and the lowest points are all located on the left side of the shell 101;

[0052] The distribution mechanism 2 includes a first hydraulic cylinder 202, the top of which is threadedly mounted on the outer top of the housing 101, an elastic rope 204 is fixedly connected to the bottom of the one-way filter disc 102, and multi-fiber filter balls 205 are evenly spacedly connected to the elastic rope 204, and the multi-fiber filter balls 205 are elastically mounted between the one-way filter disc 102 and the pressure disc 103 through the elastic rope 204;

[0053] The driving mechanism 3 includes a second hydraulic cylinder 301, a side plate 302 is fixedly connected to the surface of the second hydraulic cylinder 301, and the side plate 302 is threadedly connected to the inner wall of the inner concave body 105. A telescopic rod 303 is provided on the top of the second hydraulic cylinder 301, and the top of the telescopic rod 303 passes through the inner concave body 105 and is threadedly connected to a connecting plate 304. The connecting plate 304 can realize that the telescopic rod 303 drives all guide shafts 305 to move synchronously. A scraping hole is opened on the surface of the connecting plate 304 for stirring the sewage between the pressure plate 103 and the fiberboard 104; a sleeve 307 is provided above the connecting plate 304, and the sleeve 307 is arranged between the one-way filter disc 102 and the pressure disc 103, and the top end of the sleeve 307 is fixed to the bottom end of the one-way filter disc 102, and a guide shaft 305 is arranged in the sleeve 307, and the bottom end of the guide shaft 305 passes through the pressure disc 103 and is arranged below the pressure disc 103; the outer wall of the guide shaft 305 is concave to form an annular groove 306, and the pressure disc 103 is fitted on the outer wall of the annular groove 306, and the length of the annular groove 306 is greater than the thickness of the annular groove 306, and the annular groove 306 can move in the annular groove 306 in the vertical direction along the outer wall of the annular groove 306;

[0054] When in use, the second hydraulic cylinder 301 can be used to drive the connecting plate 304 to extend and retract, and the scraping holes on the surface of the connecting plate 304 can be used to locally stir the semi-clean water, thereby increasing the local flow rate of the semi-clean water, so that the semi-clean water and the organic polymer flocculant can be quickly mixed, thereby accelerating the combination efficiency of the suspended solids in the semi-clean water and the organic polymer flocculant, and realizing rapid purification of the semi-clean water; improving the purification efficiency of the treatment tank 1 for sewage.

[0055] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A three-phase separation wastewater filtration device for oil mining, characterized in that: The invention comprises a processing tank body (1), wherein a distribution mechanism (2) is installed inside the processing tank body (1), a driving mechanism (3) is installed below the distribution mechanism (2), the driving mechanism (3) is threadedly installed at the middle position of the bottom of the processing tank body (1), and a horizontal three-phase separation tank is installed on the left side of the processing tank body (1); The treatment tank body (1) comprises a shell (101), and a one-way filter disc (102), a pressure disc (103), a fiberboard (104) and an inner concave body (105) are arranged inside the treatment tank body (1), and are arranged in sequence from top to bottom, and the outer walls of the one-way filter disc (102) and the fiberboard (104) are seamlessly connected to the inner wall of the shell (101), the outer wall of the pressure disc (103) is seamlessly in contact with the inner wall of the shell (101), and the pressure disc (103) can move vertically along the inner wall of the shell (101); the cross-sectional shapes of the one-way filter disc (102), the pressure disc (103) and the fiberboard (104) are all landslide-shaped, and the lowest points are all located on the left side of the shell (101); The distribution mechanism (2) comprises a first hydraulic cylinder (202), the top of the first hydraulic cylinder (202) being threadedly mounted on the outer top of the housing (101), an elastic rope (204) being fixedly connected to the bottom of the one-way filter disc (102), multi-fiber filter balls (205) being evenly spacedly connected to the elastic rope (204), and the multi-fiber filter balls (205) being elastically mounted between the one-way filter disc (102) and the pressure plate (103) via the elastic rope (204).

2. The three-phase separation sewage filtering device for oil mining according to claim 1 is characterized in that: The pressure plate (103) is provided with filter holes, the fiberboard (104) is made of chemical synthetic oil-absorbing fibers, and the fiberboard (104) is provided with water-permeable pores for accelerating water permeation, and the middle part of the inner concave body (105) is recessed into the shell (101).

3. The three-phase separation sewage filtering device for oil mining according to claim 2 is characterized in that: An oil pipe (106), a float pipe (107) and a drain pipe (108) are fixedly connected to one side of the outer surface of the shell (101), and a backwash pipe (109) and a feed pipe are fixedly connected to the other side of the outer surface of the shell (101). The oil pipe (106) is arranged above the pressure plate (103) through the shell (101), the float pipe (107) is arranged above the fiberboard (104) through the shell (101), the drain pipe (108) is used to discharge clean water, and the feed pipe is used to transport an organic polymer flocculant to the chamber between the pressure plate (103) and the fiberboard (104).

4. The three-phase separation sewage filtering device for oil mining according to claim 3 is characterized in that: A net bag plate (201) is telescopically mounted on the bottom of the first hydraulic cylinder (202), and the net bag plate (201) is fitted above the pressure plate (103) through the first hydraulic cylinder (202). A plurality of rope knots (203) are fixedly mounted on the edge of the net bag plate (201), and the bottom of the elastic rope (204) is fixedly connected to the rope knot (203). The net bag plate (201) is provided with a plurality of water-permeable holes for filtering out water, and a tilting opening is provided on the left side of the net bag plate (201).

5. The three-phase separation sewage filtering device for oil mining according to claim 4 is characterized in that: The driving mechanism (3) comprises a second hydraulic cylinder (301), a side plate (302) being fixedly connected to the surface of the second hydraulic cylinder (301), the side plate (302) being threadedly connected to the inner wall of the inner concave body (105), a telescopic rod (303) being provided at the top of the second hydraulic cylinder (301), the top of the telescopic rod (303) passing through the inner concave body (105) being threadedly connected to a connecting plate (304), a scraping hole being provided on the surface of the connecting plate (304) for stirring the sewage between the pressure plate (103) and the fiberboard (104).

6. A three-phase separation sewage filtering device for oil mining according to claim 5, characterized in that: A sleeve (307) is provided above the connecting plate (304). The sleeve (307) is arranged between the one-way filter disc (102) and the pressure disc (103), and the top end of the sleeve (307) is fixed to the bottom end of the one-way filter disc (102). A guide shaft (305) is provided in the sleeve (307), and the bottom end of the guide shaft (305) passes through the pressure disc (103) and is arranged below the pressure disc (103).

7. A three-phase separation wastewater filtering device for oil mining according to claim 6, characterized in that: The outer wall of the guide shaft (305) is concave to form an annular groove (306), the pressure plate (103) is sleeved on the outer wall of the annular groove (306), and the length of the annular groove (306) is greater than the thickness of the annular groove (306), and the annular groove (306) can move in a vertical direction in the annular groove (306) along the outer wall of the annular groove (306).

8. The three-phase separation sewage filtering device for oil mining according to claim 1 is characterized by: The horizontal three-phase separation tank comprises a horizontal tank (4), a sewage discharge pipe (5) is fixedly connected to the right bottom of the horizontal tank (4), a water pump is installed on the sewage discharge pipe (5), the output end of the water pump is connected to the top of the shell (101) for introducing sewage, and the bottom of the horizontal tank (4) is fixedly connected to a sewage discharge pipe (6), and an oil outlet pipe (7) fixedly connected to the bottom side wall of the horizontal tank (4).

9. A three-phase separation wastewater filtering device for oil mining according to claim 8, characterized in that: A pressure gauge (8) is threadedly installed on the top of the horizontal tank (4) near the right side, and is used to detect the air pressure inside the horizontal tank (4); an oil, gas and water inlet pipe (14) is fixedly connected to the left side of the horizontal tank (4), and is used to input oil, gas and water into the horizontal tank (4); a gas outlet pipe (15) is fixedly connected to the right side of the horizontal tank (4) at a position symmetrical to the oil, gas and water inlet pipe (14), and is used to output the separated gas; an inlet separator (9) is threadedly installed at the position where the oil, gas and water inlet pipe (14) is connected to the inside of the horizontal tank (4), and can perform preliminary separation of liquid and gas.

10. The three-phase separation wastewater filtering device for oil mining according to claim 9, characterized in that: A rectifier plate (10) is installed inside the horizontal tank (4) and on the right side of the inlet separator (9), and a defoamer (11) is fixedly installed inside the horizontal tank (4) and on the right side of the rectifier plate (10) to further purify the gas; an oil-water baffle plate (12) is fixedly connected inside the horizontal tank (4) and below the rectifier plate (10), and an oil pool (13) is fixedly connected to the right side of the oil-water baffle plate (12), a notch is provided on the left side of the oil pool (13), and the height of the notch is level with the top of the oil-water baffle plate (12), and an oil outlet pipe (7) passes through the horizontal tank (4) and is connected to the bottom of the oil pool (13).

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