Aging oil separation and recovery treatment system

Abstract

The utility model discloses an aging oil separation and recovery treatment system which comprises a filter, a feeding pump, a reaction tank, a three-phase centrifugal separator and a disc centrifuge which are sequentially connected through pipes, and a liquid outlet of the three-phase centrifugal separator is connected with a feeding port of the disc centrifuge. The reaction tank comprises an outer barrel, a top ring, a top cover, a sewage inlet, a sewage outlet, a stirring device and a dosing port, the stirring device comprises an inner barrel, stirring blades, an inner gear ring, an outer gear and a motor, the inner barrel is of a barrel-shaped structure with an upper opening and a lower opening, the stirring blades are fixed on the circumference of the inner wall of the inner barrel and are vertical, the inner gear ring is integrally formed at the top of the inner barrel, and the outer gear ring is fixed on the inner wall of the inner barrel. The inner gear ring is placed above the top ring and rotates by 360 degrees along the axis of the outer cylinder, the outer gear is meshed with the inner gear ring, the motor is fixed above the top cover, and the output end of the motor is fixed to the outer gear. According to the oil-water separator, the oil-water separation efficiency is improved, and oil-phase substances cannot be hung on the stirring blades to form a residual phenomenon when being discharged.

Description

Technical Field

[0001] The utility model belongs to the technical field of separation and recovery of aged oil, and particularly relates to an aged oil separation and recovery processing system. Background Art

[0002] Aged oil refers to oil whose physical and chemical properties have changed due to contamination, oxidation or long-term storage during use. Demulsification of aged oil is a complex process, which separates the emulsion in the oil-water mixture into oil phase and water phase. Due to long-term use or contamination, the stability of the emulsion of aged oil is enhanced, making it difficult to separate oil and water. Stirring can speed up the demulsification efficiency of demulsifiers for aged oil.

[0003] The utility model patent with the publication number CN204342740U discloses an aged oil recovery and treatment system, wherein an aged oil inlet and a dosing port are provided on the dosing tank, a heating device and a stirring device are installed in the dosing tank, demulsifiers and viscosity reducers and other agents are injected into the dosing tank through the dosing port, the aged oil and the agents are stirred evenly by the stirring device under heating, and the viscosity of the aged oil is reduced by the preliminary treatment of the dosing tank. However, the demulsification efficiency by the single stirring method needs to be improved, and the oil phase separated from the aged oil and the demulsifier is easy to hang on the stirring blade when discharged downward, resulting in the accumulation of the oil phase material on the stirring blade, so that the oil phase material is not discharged cleanly in the reaction tank. Utility Model Content

[0004] The utility model aims to provide an aged oil separation and recovery system to solve the problems of slow oil-water separation efficiency and residues of oil phase substances on stirring blades in the existing aged oil.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A system for separating and recovering aged oil, comprising a filter, a feed pump, a reaction tank, a three-phase centrifugal separator, and a disc centrifuge, which are connected in sequence through pipes, wherein the three-phase centrifugal separator is provided with a first water outlet, the oil separation outlet of the three-phase centrifugal separator is connected to the feed inlet of the disc centrifuge, the oil and water separated by the disc centrifuge are respectively provided with an oil outlet and a second water outlet, and the sludge separated by the three-phase centrifugal separator and the disc centrifuge are respectively provided with sludge outlets; the reaction tank comprises an outer cylinder, a top ring, a top cover, a sewage inlet, a sewage outlet, a stirring device, and a dosing port, the top of the outer cylinder is integrally formed with a top ring, the top cover is installed with the outer cylinder through the top ring, and the A sewage inlet is arranged on the top of the top cover and is connected to the feed pump pipe. A sewage outlet is arranged on the bottom of the outer cylinder and is connected to the inlet pipe of the three-phase centrifugal separator. A stirring device is installed in the outer cylinder, and a dosing port is also installed on the top cover. The stirring device comprises an inner cylinder, stirring blades, an inner gear ring, an outer gear, and a motor. The inner cylinder is a cylindrical structure with upper and lower openings. A plurality of stirring blades are fixed on the circumference of the inner wall of the inner cylinder. The stirring blades are vertical. An inner gear ring is integrally formed on the top of the inner cylinder. The inner gear ring is placed above the top ring and can make the inner cylinder rotate 360° along the axis of the outer cylinder. The outer gear is meshed with the inner gear ring. The motor is fixed above the top cover, and the output end is fixed to the outer gear.

[0007] Preferably, an annular groove is formed on the top surface of the top ring, a wheel disc is placed in the annular groove, a plurality of balls are arranged on the circumference of the top surface of the wheel disc, a ball pressure groove corresponding to the ball is formed on the bottom surface of the inner gear ring, and the ball pressure groove is located on the ball.

[0008] Preferably, the reaction tank further comprises an ultrasonic demulsifier arranged at the center, and the ultrasonic demulsifier is fixed to the center of the top cover.

[0009] Preferably, the sludge outlet is externally connected to a screw pump.

[0010] Preferably, the medium pre-entering the reaction tank, the three-phase centrifugal separator and the disc centrifuge is heated by a heat exchanger, and the heat exchanger is connected to supply heat via a heater.

[0011] Preferably, the pipeline connecting the feed pump and the reaction tank is connected in parallel with a pretreatment two-phase centrifugal separator through a three-way valve, the discharge outlet of the pretreatment two-phase centrifugal separator is connected to the sewage inlet pipe of the reaction tank, and the pretreatment two-phase centrifugal separator is also provided with a sludge outlet connected to the screw pump.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1) The stirring device in the reaction tank drives multiple stirring blades to rotate through the inner cylinder, which changes the original rotation mode of the stirring blades, so that there is no obstacle in the center of the reaction cylinder, and the number of stirring blades arranged in a circle is large, which can speed up the oil-water separation efficiency. At the same time, the stirring blades are vertical, and the oil phase material will not hang on the stirring blades to form residue when discharged;

[0014] 2) The reaction tank can greatly accelerate the oil-water separation efficiency of aged oil by adding demulsifier and ultrasonic demulsifier at the same time;

[0015] 3) The pretreatment two-phase centrifugal separator can preheat the aged oil with high mud content to separate the sludge, reduce the residual sludge in the reaction tank, and reduce the burden of subsequent sludge treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a connection schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the appearance structure of the reaction tank of the utility model;

[0018] Figure 3 It is a cross-sectional view of the reaction tank of the utility model;

[0019] Figure 4 This is a schematic diagram of the appearance structure of the inner cylinder of the utility model;

[0020] Figure 5 This is a schematic diagram of the assembly of the wheel disc structure of the utility model;

[0021] Figure 6 This is a schematic diagram of the roller groove pressing structure of the utility model;

[0022] Figure 7 This is a schematic diagram of the connection of the pretreatment two-phase centrifugal separator in Example 2;

[0023] Icons: 1. Filter; 2. Feed pump; 3. Reactor; 301. Outer cylinder; 3011. Top ring; 3012. Annular groove; 302. Top cover; 303. Sewage inlet; 304. Sewage outlet; 305. Stirring device; 3051. Inner cylinder; 3052. Stirring blade; 3053. Inner gear ring; 3054. Outer gear; 3055. Motor; 306. Dosing port; 307. Roulette; 3071. Ball; 3072. Ball pressure groove; 308. Ultrasonic demulsifier; 4. Three-phase centrifuge; 41. First water outlet; 5. Disc centrifuge; 6. Oil outlet; 7. Second water outlet; 8. Sludge outlet; 9. Screw pump; 10. Heater; 11. Heat exchanger; 12. Pretreatment two-phase centrifuge; 13. Three-way valve. DETAILED DESCRIPTION

[0024] In order to make the purpose, method scheme and advantages of the embodiments of the utility model clearer, the method scheme in the embodiments of the utility model is clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Example 1

[0026] like Figure 1-6 As shown, an aged oil separation and recovery treatment system comprises a filter 1, a feed pump 2, a reaction tank 3, a three-phase centrifugal separator 4, and a disc centrifuge 5 which are connected in sequence through pipes, the three-phase centrifugal separator 4 is provided with a first water outlet 41, the oil separation outlet of the three-phase centrifugal separator 4 is connected with the feed port of the disc centrifuge 5, the oil and water separated by the disc centrifuge 5 are respectively provided with an oil outlet 6 and a second water outlet 7, and the sludge separated by the three-phase centrifugal separator 4 and the disc centrifuge 5 are respectively provided with a sludge outlet 8; the filter 1 is used to block large particulate matter, the reaction tank 3 performs demulsification and separation on the aged oil, the three-phase centrifugal separator 4 can separate and treat the sludge, water and oil of the demulsified aged oil, and the disc centrifuge 5 can further strengthen the separation of the oil discharged from the three-phase centrifugal separator 4, improve the quality of crude oil, and reduce the mud and water content;

[0027] The reaction tank 3 comprises an outer cylinder 301, a top ring 3011, a top cover 302, a sewage inlet 303, a sewage outlet 304, a stirring device 305, and a dosing port 306. The top of the outer cylinder 301 is integrally formed with a top ring 3011, and the top cover 302 is buckled or bolted to the outer cylinder 301 through the top ring 3011. The top of the top cover 302 is provided with a sewage inlet 303 connected to the feed pump 2 pipe so that the aged oil stock liquid enters the reaction tank. The bottom of the outer cylinder 301 is provided with a sewage outlet 304 connected to the inlet pipe of the three-phase centrifugal separator 4 so that the demulsified and separated aged oil liquid and oil phase substances are discharged. The outer cylinder 301 is provided with a stirring device 305 to accelerate the demulsification efficiency. The top cover 302 is also provided with a dosing port 306 to separate the aged oil from water by adding a demulsifier.

[0028] The stirring device 305 includes an inner cylinder 3051, stirring blades 3052, an inner gear ring 3053, an outer gear 3054, and a motor 3055. The inner cylinder 3051 is a cylindrical structure with openings at the top and bottom. A plurality of stirring blades 3052 are fixed on the inner wall circumference of the inner cylinder 3051. The stirring blades 3052 are vertical so that the center of the inner cylinder 3051 will not hinder the outflow of the oil phase substance. The inner cylinder 3051 is integrally formed with an inner gear ring 3053 on the top. The inner gear ring 3053 is placed It is placed above the top ring 3011, and can make the inner cylinder 3051 rotate 360 ​​degrees along the axis of the outer cylinder 301. The outer gear 3054 is meshed with the inner gear ring 3053. The motor 3055 is fixed above the top cover 302, and the output end is fixed to the outer gear 3054. The inner cylinder 3051 is rotated by the motor 3055 and the gear transmission method to play a stirring role, replacing the original stirring method of the stirring blade, accelerating the stirring efficiency, accelerating the contact between the demulsifier and the aged oil, and improving the reaction efficiency.

[0029] Furthermore, an annular groove 3012 is provided on the top surface of the top ring 3011, a wheel disc 307 is placed in the annular groove 3012, and the wheel disc and the annular groove 3012 are fixed by friction, a plurality of balls 3071 are arranged on the circumference of the top surface of the wheel disc 307, and the balls 3071 can maintain their own arbitrary rotation in the original position, and a ball pressure groove 3072 corresponding to the ball 3071 is provided on the bottom surface of the inner gear ring 3053, and the ball pressure groove 3072 is located on the ball 3071, thereby reducing the friction between the ball pressure groove 3072 and the top ring 3011 during rotation.

[0030] Furthermore, the reaction tank 3 also includes an ultrasonic demulsifier 308 disposed at the center, which is fixed to the center of the top cover 302 and utilizes the mechanical vibration and thermal effect of ultrasound in combination with the addition of chemicals and stirring to accelerate the separation of water and oil particles in the emulsified aged oil.

[0031] Furthermore, the sludge outlet 8 is externally connected to a screw pump 9, through which the sludge is discharged in a centralized manner.

[0032] Furthermore, the heater 10 is externally connected to three heat exchangers 11, and the three heat exchangers 11 preheat the medium entering the reaction tank 3, the three-phase centrifugal separator 4, and the disc centrifuge 5 respectively, so as to improve the efficiency of the oil-water separator.

[0033] During the specific implementation process, the aged oil to be treated is collected and the large particles are filtered through the filter 1, and the aged oil is heated and fed into the reaction tank 3 through the feed pump 2. A demulsifier is added into the reaction tank 3, and the motor 3055 of the stirring device 305 drives the inner cylinder 3051 to drive the stirring blade 3052 to rotate, so as to accelerate the contact efficiency between the demulsifier and the emulsified aged oil, and cooperate with the ultrasonic demulsifier to further improve the oil-water separation efficiency, and the discharged oil-water separation medium is further heated and separated into water, sludge and oil-containing liquid through the three-phase centrifugal separator 4, and the oil-containing liquid is heated again and enters the disc centrifuge 5, the separated water is discharged from the second water outlet 7, the oil is discharged from the oil outlet 6, and the sludge discharged from the three-phase centrifugal separator 4 and the disc centrifuge 5 enters the screw pump 9 from the sludge outlet 8 for centralized discharge.

[0034] Example 2

[0035] In order to reduce the burden of the aged oil with high mud content on the subsequent oil-water separation, improvements are made on the basis of Example 1, such as Figure 7 As shown, in this embodiment, the pipeline connecting the feed pump 2 and the reaction tank 3 is connected in parallel with a pretreatment two-phase centrifugal separator 12 through a three-way valve 13, and the discharge outlet of the pretreatment two-phase centrifugal separator 12 is connected to the sewage inlet 303 of the reaction tank 3. The pretreatment two-phase centrifugal separator 12 is also provided with a sludge outlet 8 connected to the screw pump 9 to prevent excessive sludge from entering the subsequent oil-water separation operation.

[0036] In the specific implementation process, when the sludge content of the aged oil is high, the heated aged oil first enters the pretreatment two-phase centrifugal separator 12 through the three-way valve 13 before entering the reaction tank 3, and the excess sludge is discharged from the screw pump 9 to obtain an emulsified aged oil with less sludge content. The filtered emulsion then enters the reaction tank 3 for reaction, thereby reducing the burden of subsequent sludge treatment. The pipeline circulation is switched through the three-way valve 13 according to the sludge content of the aged oil, and it is used flexibly.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An aged oil separation and recovery system, characterized in that: The invention comprises a filter (1), a feed pump (2), a reaction tank (3), a three-phase centrifugal separator (4), and a disc centrifuge (5) which are connected in sequence through pipes, the three-phase centrifugal separator (4) is provided with a first water outlet (41), the oil separation outlet of the three-phase centrifugal separator (4) is connected to the feed inlet of the disc centrifuge (5), the oil and water separated by the disc centrifuge (5) are respectively provided with an oil outlet (6) and a second water outlet (7), and the sludge separated by the three-phase centrifugal separator (4) and the disc centrifuge (5) are respectively provided with sludge outlets (8); The reaction tank (3) comprises an outer cylinder (301), a top ring (3011), a top cover (302), a sewage inlet (303), a sewage outlet (304), a stirring device (305), and a drug adding port (306); the top of the outer cylinder (301) is integrally formed with a top ring (3011); the top cover (302) is mounted on the outer cylinder (301) via the top ring (3011); the top of the top cover (302) is provided with a sewage inlet (303) connected to a feed pump (2) pipe; the bottom of the outer cylinder (301) is provided with a sewage outlet (304) connected to an inlet pipe of a three-phase centrifugal separator (4); the outer cylinder (301) is provided with a stirring device (305); and the top cover (302) is also provided with a drug adding port (306); The stirring device (305) comprises an inner cylinder (3051), stirring blades (3052), an inner gear ring (3053), an outer gear (3054), and a motor (3055). The inner cylinder (3051) is a cylindrical structure with openings at the top and the bottom. A plurality of stirring blades (3052) are fixed on the circumference of the inner wall of the inner cylinder (3051). The stirring blades (3052) are vertical. An inner gear ring (3053) is integrally formed on the top of the inner cylinder (3051). The inner gear ring (3053) is placed above the top ring (3011) and can make the inner cylinder (3051) and the outer cylinder (301) rotate 360 ​​degrees coaxially. The outer gear (3054) meshes with the inner gear ring (3053). The motor (3055) is fixed above the top cover (302), and the output end is fixed to the outer gear (3054).

2. The aged oil separation and recovery system according to claim 1, characterized in that: The top surface of the top ring (3011) is provided with an annular groove (3012), a wheel disc (307) is placed in the annular groove (3012), a plurality of balls (3071) are arranged on the circumference of the top surface of the wheel disc (307), and the bottom surface of the inner gear ring (3053) is provided with a ball pressure groove (3072) corresponding to the ball (3071), and the ball pressure groove (3072) is located on the ball (3071).

3. The aged oil separation and recovery system according to claim 1, characterized in that: The reaction tank (3) further comprises an ultrasonic demulsifier (308) arranged at the center, and the ultrasonic demulsifier (308) is fixed to the center of the top cover (302).

4. The aged oil separation and recovery system according to claim 1, characterized in that: The sludge outlet (8) is externally connected to a screw pump (9).

5. The aged oil separation and recovery system according to claim 1, characterized in that: The media pre-entering the reaction tank (3), the three-phase centrifugal separator (4) and the disc centrifuge (5) are heated by a heat exchanger (11), and the heat exchanger (11) is connected to the heater (10) for heat supply.

6. The aged oil separation and recovery system according to claim 1 and 4, characterized in that: The pipeline connecting the feed pump (2) and the reaction tank (3) is connected in parallel with a pretreatment two-phase centrifugal separator (12) through a three-way valve (13); the discharge outlet of the pretreatment two-phase centrifugal separator (12) is connected to the sewage inlet (303) of the reaction tank (3); and the pretreatment two-phase centrifugal separator (12) is also provided with a sludge outlet (8) connected to a screw pump (9).

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