An apparatus for separating petroleum mixed xylene

Abstract

A kind of separation device of petroleum mixed xylene, it relates to environmental protection industry technical field.Separation cylinder is equipped with vibration assembly and water collecting distributor in sequence on the upper portion of water inlet distributor, still water cylinder upper portion is equipped with oil collecting cofferdam, still water cylinder is equipped with water level control cofferdam outside oil collecting cofferdam, water level control cofferdam outside is equipped with water collecting cofferdam, water collecting distributor has pipeline connection in water level control cofferdam bottom, water collecting cofferdam lower portion is equipped with outlet pipe.The beneficial effects of the present application are: sewage is in static state in still water cylinder, oil in still water cylinder has sufficient time to rise and separate from sewage, the interface of sewage and oil in still water cylinder is located at the bottom of siphon tray, since hydrophobic lipophilic material is oil wetting material but not sewage wetting material, so siphon tray will produce siphon phenomenon to oil, and will not produce siphon phenomenon to water, oil rises to the top of siphon tray and flows out, the separated oil is distilled to remove water, and qualified oil product is obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection industry, and the device can obtain pure oil and avoid water pollution, and particularly relates to a device for separating oil and mixed xylene. BACKGROUND

[0002] Xylene is widely used in paint, resin, dye, ink and other industries as a solvent, and the wastewater generated by the above industries contains mixed xylene. Based on the economic value of xylene and the requirement of environmental protection, it is necessary to separate and recover xylene from the wastewater. The traditional treatment method is to separate the xylene in the upper layer by discharging the wastewater in the lower layer. However, there is always residual wastewater in the xylene, which is not conducive to the treatment of wastewater and the recovery of xylene, and increases the cost of wastewater treatment and the cost of xylene recovery. SUMMARY

[0003] In order to solve the problem of low filtering precision in the current waste mineral oil regeneration process, the present application provides a device for separating oil and mixed xylene.

[0004] The technical scheme provided by the present application is as follows: a device for separating oil and mixed xylene, comprising a separation tower, the separation tower comprising a lower cylindrical separation cylinder, the upper part of the separation cylinder being a conical contraction cylinder, the upper part of the contraction cylinder being a cylindrical still water cylinder, the lower part of the separation cylinder being provided with a water inlet pipe, the water inlet pipe being connected to a water inlet pump, the outlet of the water inlet pump being connected to a water inlet distributor, the separation cylinder being provided with a vibration assembly and a water collection distributor in sequence above the water inlet distributor, the upper part of the still water cylinder being provided with an oil collection weir, the still water cylinder being provided with a water level control weir outside the oil collection weir, the water level control weir being provided with a water collection weir outside, the water collection distributor being connected to the bottom of the water level control weir by a pipeline, and the lower part of the water collection weir being provided with a water outlet pipe.

[0005] The bottom of the oil collection weir is provided with a reflux pipe connected to the lower part of a distillation tank, the bottom of the distillation tank is provided with a xylene recovery pipe, and electric valves are installed on the reflux pipe and the xylene recovery pipe. The oil collection weir is provided with two liquid level switches, the top of the distillation tank is provided with a steam outlet pipe, and the distillation tank is provided with a heat conducting oil circulation pipe.

[0006] The top of the still water cylinder is provided with a capillary disc, the siphon disc is made of hydrophobic and oleophilic capillary material, and the top of the water level control weir is flush with the bottom surface of the siphon disc.

[0007] The ultrasonic assembly is composed of an outer cylinder and an inner cylinder, the outer cylinder has the same diameter as the separation cylinder, the inner cylinder has an annular cavity structure, the outer circle of the outer cylinder is provided with uniformly arranged ultrasonic transducers, the outer side and the inner side of the inner cylinder are both provided with uniformly arranged ultrasonic transducers, the inner cylinder is connected to the outer cylinder through a support, and the outer cylinder is sealingly connected to the separation cylinder through a flange.

[0008] The heat-conducting oil circulation pipe enters from the top of the distillation tank, flows out from the bottom of the distillation tank, then enters the static water cylinder for circulation, and then flows out of the static water cylinder.

[0009] The water inlet distributor and the water collecting distributor have the same structure, the water collecting distributor comprises a water distribution main pipe, one side of the water distribution main pipe is welded with a blind plate A, two rows of water distribution branch pipes are connected to the water distribution main pipe to form a "rich" structure, the end of the water collecting branch pipe is welded with a blind plate B, the water collecting pipes are uniformly arranged on the water distribution branch pipes, the water collecting pipes are upwardly open, the top of the water collecting pipe is in an enlarged flared structure, and the flow velocity of the water flow in the water collecting pipe is not greater than 0.005 m / s.

[0010] The separation cylinder is provided with an aeration device between the water inlet distributor and the vibration assembly, the aeration device is connected with an air compressor, and the siphon disc is provided with an exhaust pipe.

[0011] The steam outlet pipe is connected with an adsorption tank in series, and the adsorption tank is filled with high-efficiency activated carbon.

[0012] The effective volume of the oil collecting cofferdam is two-thirds of the distillation tank.

[0013] The beneficial effects of the present application are as follows: the mixed xylene (hereinafter referred to as oil) enters the separation cylinder from the bottom, the sewage uniformly rises on the cross section of the separation cylinder, the flow velocity is small, the rising water flow passes through the ultrasonic vibration of the ultrasonic assembly, under the cavitation effect of the ultrasonic wave, the fine oil droplets gather to form large oil droplets, the oil droplets and the sewage continue to rise into the static water cylinder because the water collecting speed of the water collecting distributor is lower than the rising speed of the oil droplets, the sewage is in a static state in the static water cylinder, the oil in the static water cylinder has sufficient time to rise and separate from the sewage, the interface between the sewage and the oil in the static water cylinder is located at the bottom of the siphon disc, the siphon disc will produce a siphon phenomenon for the oil and will not produce a siphon phenomenon for the water because the hydrophobic and oleophilic material is the infiltration material of the oil but not the infiltration material of the sewage, the oil rises to the top of the siphon disc under the siphon effect and flows out, the separated oil is distilled to remove the water, qualified oil is obtained, the oil in the water is separated at the same time, and water pollution is avoided. The present application also uses high-efficiency activated carbon to adsorb harmful gases distilled out, so that atmospheric pollution is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is a structural schematic diagram of the present application; Fig. 1 Fig. 2 is a structural schematic diagram of the ultrasonic assembly in the present application;

[0015] Fig. 2 Fig. 3 is a structural schematic diagram of the water collecting distributor in the present application;

[0016] Fig. 4 is a structural schematic diagram of the water collecting branch pipe in the present application; Fig. 3 Fig. 5 is a structural schematic diagram of the water collecting pipe in the present application;

[0017] Fig. 4 Fig. 6 is an A-A sectional view of Fig. 5. Fig. 3 Fig. 7 is a structural schematic diagram of the aeration device in the present application.​​

[0018] In the diagram, 1-Separation tower, 101-Separation cylinder, 102-Contraction cylinder, 103-Stationary water cylinder, 104-Water level control weir, 105-Water collection weir, 106-Oil collection weir, 2-Inlet pipe, 3-Inlet pump, 4-Inlet water distributor, 5-Water collection distributor, 501-Water distribution main pipe, 502-Water distribution branch pipe, 503-Water collection pipe, 504-Blind flange A, 505-Blind flange B, 6-Ultrasonic assembly, 601-Outer cylinder, 602-Inner cylinder, 603-Support component, 7-Outlet pipe, 8-Xylene recovery pipe, 9-Level switch, 10-Distillation tank, 11-Heat transfer oil circulation pipe, 12-Steam outlet pipe, 13-Adsorption tank, 14-Aerator, 15-Air compressor, 16-Ultrasonic transducer, 17-Siphon plate, 18-Exhaust pipe, 19-Return pipe. Detailed Implementation

[0019] like Figs. 1-4 As shown, a separation device for petroleum-mixed xylene includes a separation tower 1. The separation tower 1 includes a lower cylindrical separation cylinder 101, an upper conical shrink cylinder 102, and an upper cylindrical stilling water cylinder 103. The lower part of the separation cylinder 101 is provided with a water inlet pipe 2, which is connected to a water inlet pump 3. The outlet of the water inlet pump 3 is connected to a water inlet distributor 4. The separation cylinder 101 is provided with a vibration component 6 and a water collection distributor 5 in sequence above the water inlet distributor 4. The upper part of the stilling water cylinder 103 is provided with an oil collection weir 106. The stilling water cylinder 103 is provided with a water level control weir 104 outside the oil collection weir 106. The water collection weir 105 is provided outside the water level control weir 104. The water collection distributor 5 is connected to the bottom of the water level control weir 104 by a pipe. The lower part of the water collection weir 105 is provided with a water outlet pipe 7.

[0020] The mixed xylene (hereinafter referred to as oil) enters the separation cylinder 101 from the bottom. The water distributor 4 causes the sewage to rise evenly on the cross section of the separation cylinder 101. The water flow velocity is low. The rising water flow passes through the ultrasonic component 6 and is subjected to ultrasonic vibration. Under the cavitation effect of the ultrasonic waves, the fine oil droplets gather to form large oil droplets. Since the water collection speed of the water distributor 5 is lower than the rising speed of the oil droplets, the oil droplets and sewage continue to rise and enter the still water cylinder 103. The separated sewage enters the water level control weir 104. The liquid level in the still water cylinder 103 is determined by the water level control weir 104. The sewage is in a static state in the still water cylinder 103. The oil in the still water cylinder 103 has sufficient time to rise and separate from the sewage.

[0021] The bottom of the oil collection weir 106 is provided with a reflux pipe 19 connected to the lower part of the distillation tank 10. The bottom of the distillation tank 10 is provided with a xylene recovery pipe 8. Electric valves are installed on both the reflux pipe 19 and the xylene recovery pipe 8. The oil collection weir 106 is provided with two liquid level switches 9. The top of the distillation tank 10 is provided with a steam outlet pipe 12. The distillation tank 10 is provided with a heat transfer oil circulation pipe 11.

[0022] When the liquid level in the oil collection cofferdam 106 is high, the electric valve of the reflux pipe 19 is opened by the liquid level switch 9, and the oil flowing out of the oil collection cofferdam 106 enters the distillation tank 10. Heat-conducting oil at 120°C is introduced into the distillation tank 10 to distill the oil. At this time, the water in the oil is distilled out. After the distillation is completed, the electric valve of the xylene recovery pipe 8 is opened to obtain qualified xylene.

[0023] A capillary plate 17 is provided at the top of the static water cylinder 103. The siphon plate 17 is made of a capillary material that is hydrophobic and oleophilic. The top of the water level control cofferdam 104 is flush with the bottom surface of the siphon plate 17, that is, the interface between the sewage and the oil in the static water cylinder 103 is located at the bottom of the siphon plate 17. Since the hydrophobic and oleophilic material is a wetting material for oil rather than sewage, the siphon plate 17 will cause a siphon phenomenon for oil and will not cause a siphon phenomenon for water. The oil rises to the top of the siphon plate 17 and flows out under the siphon action.

[0024] The ultrasonic component 6 consists of an outer cylinder 601 and an inner cylinder 602. The outer cylinder 601 has the same diameter as the separation cylinder 101. The inner cylinder 602 is a ring-shaped cavity structure. Ultrasonic vibrators 16 are uniformly arranged on the outer circumference of the outer cylinder 601. Ultrasonic vibrators 16 are uniformly arranged on both the outer side inner wall and the inner side inner wall of the inner cylinder 602. The inner cylinder 602 is connected to the outer cylinder 601 through a support member 603. The outer cylinder 601 is hermetically connected to the separation cylinder 101 through a flange.

[0025] The heat-conducting oil circulation pipe 11 enters from the top of the distillation tank 10 and flows out from the bottom of the distillation tank 10, then enters the static water cylinder 103 for internal circulation, and then flows out of the static water cylinder 103. The diameter of the static water cylinder 103 is designed to be smaller than that of the separation cylinder 101, which can reduce the load of the heat-conducting oil and at the same time increase the liquid temperature in the static water cylinder 103, making the oil activity in the static water cylinder 103 increase and being beneficial to the separation from sewage.

[0026] The water inlet distributor 4 and the water collection distributor 5 have the same structure. The water collection distributor 5 includes a water distribution main pipe 501. A blind plate A504 is welded on one side of the water distribution main pipe 501. Two rows of water distribution branch pipes 502 are connected beside the water distribution main pipe 501 to form a "rich" character structure. A blind plate B505 is welded at the end of the water collection branch pipe 502. Water collection pipes 503 are uniformly arranged on the water distribution branch pipe 502. The water collection pipes 503 open upwards, and the top of the water collection pipes 503 is an enlarged flared structure. The water flow velocity in the water collection pipes 503 is not greater than 0.005 m / s.

[0027] An aeration distributor 14 is provided between the water inlet distributor 4 and the vibration component 6 in the separation cylinder 101. The aeration distributor 14 is connected to an air compressor 15. An exhaust pipe 18 is provided on the siphon plate 17. Through aeration, the oil adheres to the surface of the bubbles and quickly rises to separate from the sewage.

[0028] A steam outlet pipe 12 is provided with a series-connected adsorption tank 13 filled with high-efficiency activated carbon to adsorb the harmful gas distilled out, so as to avoid atmospheric pollution by the harmful gas.

[0029] The effective volume of the oil collection cofferdam 106 is two-thirds of the distillation tank 10.

Claims

1. A separation apparatus for petroleum mixed xylene comprising a separation column (1), characterized in that: The separation tower (1) comprises a lower cylindrical separation cylinder (101), a conical contraction cylinder (102) at the upper part of the separation cylinder (101), a cylindrical hydrostatic cylinder (103) at the upper part of the contraction cylinder (102), a water inlet pipe (2) arranged at the lower part of the separation cylinder (101), a water inlet pump (3) connected with the water inlet pipe (2), a water inlet distributor (4) connected with the outlet of the water inlet pump (3), an ultrasonic assembly (6) and a water collecting distributor (5) arranged at the upper part of the water inlet distributor (4) in sequence at the upper part of the separation cylinder (101), an oil collecting cofferdam (106) arranged at the upper part of the hydrostatic cylinder (103), a water level control cofferdam (104) arranged outside the hydrostatic cylinder (103) at the outer side of the oil collecting cofferdam (106), a water collecting cofferdam (105) arranged outside the water level control cofferdam (104), and the water collecting distributor (5) connected with the bottom of the water level control cofferdam (104) through a pipeline, and a water outlet pipe (7) arranged at the lower part of the water collecting cofferdam (105); The bottom of the oil collecting cofferdam (106) is provided with a reflux pipe (19) connected with the lower part of a distillation tank (10), the bottom of the distillation tank (10) is provided with a xylene recovery pipe (8), and electric valves are arranged on the reflux pipe (19) and the xylene recovery pipe (8). The oil collecting cofferdam (106) is provided with two liquid level switches (9) arranged in a vertical mode, the top of the distillation tank (10) is provided with a steam outlet pipe (12), and the distillation tank (10) is provided with a heat conducting oil circulating pipe (11). The ultrasonic assembly (6) comprises an outer cylinder (601) and an inner cylinder (602), the outer cylinder (601) has the same diameter as the separation cylinder (101), the inner cylinder (602) has a ring-shaped cavity structure, a plurality of ultrasonic transducers (16) are uniformly arranged on the outer circle of the outer cylinder (601), the outer side inner wall and the inner side inner wall of the inner cylinder (602) are both provided with a plurality of ultrasonic transducers (16) arranged uniformly, the inner cylinder (602) is connected with the outer cylinder (601) through a support (603), and the outer cylinder (601) is sealingly connected with the separation cylinder (101) through a flange. The water inlet distributor (4) and the water collecting distributor (5) have the same structure, the water collecting distributor (5) comprises a water distribution main pipe (501), a blind plate A (504) is welded to one side of the water distribution main pipe (501), two rows of water distribution branch pipes (502) are connected with the water distribution main pipe (501) to form a "rich" structure, a blind plate B (505) is welded to the end of the water distribution branch pipe (502), water collecting pipes (503) are uniformly arranged on the water distribution branch pipe (502), the water collecting pipes (503) are upwardly open, the top of the water collecting pipe (503) is in a widened trumpet structure, and the flow velocity of water in the water collecting pipe (503) is not greater than 0.005 m / s.

2. A petroleum mixed xylene separation device according to claim 1, characterized by: The top of the hydrostatic cylinder (103) is provided with a siphon disc (17) made of a hydrophobic and oleophilic capillary material, and the top of the water level control cofferdam (104) is flush with the bottom surface of the siphon disc (17).

3. The apparatus of claim 1, wherein: The heat conducting oil circulating pipe (11) enters from the top of the distillation tank (10), flows out from the bottom of the distillation tank (10), then circulates in the hydrostatic cylinder (103), and then flows out of the hydrostatic cylinder (103).

4. The apparatus of claim 1 wherein: The separation cylinder (101) is provided with an aeration distributor (14) between the water inlet distributor (4) and the ultrasonic assembly (6), the aeration distributor (14) is connected with an air compressor (15), and the siphon disc (17) is provided with an exhaust pipe (18).

5. The apparatus of claim 1 wherein: The steam outlet pipe (12) is connected with an adsorption tank (13) in series, and the adsorption tank (13) is filled with high-efficiency activated carbon.

6. The apparatus of claim 1 wherein: The effective volume of the oil collecting cofferdam (106) is two-thirds of the distillation tank (10).

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