Separation device for petroleum mixed xylene

Abstract

The invention discloses a petroleum mixed xylene separation device and relates to the technical field of environmental protection industry. The separating cylinder is sequentially provided with a vibration assembly and a water collecting and distributing device above the water inlet and distributing device, the upper portion of the still water cylinder is provided with an oil collecting cofferdam, the still water cylinder is provided with a water level control cofferdam outside the oil collecting cofferdam, a water collecting cofferdam is arranged outside the water level control cofferdam, the water collecting and distributing device is connected to the bottom of the water level control cofferdam through a pipeline, and the lower portion of the water collecting cofferdam is provided with a water outlet pipe. The sewage treatment device has the beneficial effects that sewage is in a static state in the static water cylinder, oil in the static water cylinder has sufficient time to rise and be separated from the sewage, an interface of the sewage and the oil in the static water cylinder is positioned at the bottom of the siphon disc, and a hydrophobic oleophylic material is an oil infiltration material instead of a sewage infiltration material, so that the sewage treatment effect is greatly improved. The siphon disc can generate siphonage to oil and does not generate siphonage to water, the oil rises to the top of the siphon disc and flows out, the separated oil is distilled to remove water, and a qualified oil product is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection industry. This device can obtain pure oil and avoid water pollution, and particularly relates to a separation device for petroleum mixed xylene. Background Art

[0002] Xylene is widely used as a solvent in industries such as coatings, resins, dyes, and inks. The wastewater generated by the above industries contains mixed xylene. Based on the economic value of xylene and environmental protection requirements, it is necessary to separate and recover xylene from the wastewater. The traditional treatment method is to drain the bottom wastewater to separate the upper xylene, but there will always be residual wastewater in the xylene during the process, which is not conducive to the treatment of wastewater and the recovery treatment of xylene, increasing the wastewater treatment cost and xylene recovery cost. Summary of the Invention

[0003] In order to solve the problem of low filtration accuracy in the current waste mineral oil regeneration and processing process, the present invention provides a separation device for petroleum mixed xylene.

[0004] The technical solution provided by the present invention is: a separation device for petroleum mixed xylene, including a separation tower. The separation tower includes a cylindrical separation cylinder at the lower part, a conical contraction cylinder at the upper part of the separation cylinder, and a cylindrical static water cylinder at the upper part of the contraction cylinder. An inlet pipe is provided at the lower part of the separation cylinder, and the inlet pipe is connected to an inlet water pump. The outlet of the inlet water pump is connected to an inlet water distributor. A vibration assembly and a water collection distributor are successively provided above the inlet water distributor in the separation cylinder. An oil collection weir is provided at the upper part of the static water cylinder. A water level control weir is provided outside the oil collection weir in the static water cylinder, and a water collection weir is provided outside the water level control weir. The water collection distributor is connected to the bottom of the water level control weir by a pipeline, and an outlet pipe is provided at the lower part of the water collection weir; A reflux pipe is provided at the bottom of the oil collection weir and is connected to the lower part of a distillation tank. A xylene recovery pipe is provided at the bottom of the distillation tank. Electric valves are installed on both the reflux pipe and the xylene recovery pipe. Two liquid level switches, upper and lower, are provided on the oil collection weir. A steam outlet pipe is provided at the top of the distillation tank, and a heat transfer oil circulation pipe is provided inside the distillation tank.

[0005] A capillary plate is provided at the top of the static water cylinder. The siphon suction cup is made of a hydrophobic and lipophilic capillary material, and the top of the water level control weir is flush with the bottom surface of the siphon suction cup.

[0006] 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 is an annular cavity structure. Ultrasonic vibrators are uniformly arranged on the outer circumference of the outer cylinder. Ultrasonic vibrators are uniformly arranged on both the outer side inner wall and the inner side inner wall of the inner cylinder. The inner cylinder is connected to the outer cylinder through a support member, and the outer cylinder is hermetically connected to the separation cylinder through a flange.

[0007] The heat transfer 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 internal circulation, and then flows out of the static water cylinder.

[0008] The structure of the water inlet distributor is the same as that of the water receiving distributor. The water receiving distributor comprises a water distribution main pipe. A blind plate A is welded on one side of the water distribution main pipe. Two rows of water distribution branch pipes are connected to the water distribution main pipe to form a "丰" structure. Blind plates B are welded on the ends of the water receiving branch pipes. Water receiving pipes are evenly arranged on the water distribution branch pipes. The water receiving pipes open upwards. The top of the water receiving pipes is an enlarged trumpet structure. The water flow velocity in the water receiving pipes is not more than 0.005m / s.

[0009] The separation cylinder is provided with an aerator between the water inlet distributor and the vibration component. The aerator is connected to an air compressor, and an exhaust pipe is provided on the siphon plate.

[0010] An adsorption tank is connected in series on the steam outlet pipe, and the adsorption tank is filled with high-efficiency activated carbon.

[0011] The effective volume of the oil collection cofferdam is two-thirds of the distillation tank.

[0012] The beneficial effects of the present invention are as follows: mixed xylene (hereinafter referred to as oil) enters the separation cylinder from the bottom, sewage rises uniformly on the cross section of the separation cylinder, the water flow rate is low, and the rising water flow passes through the ultrasonic vibration of the ultrasonic component. Under the cavitation effect of the ultrasonic wave, the fine oil droplets gather to form large oil droplets. Since the water collection speed of the water collector and water distributor is lower than the rising speed of the oil droplets, the oil droplets and sewage continue to rise into the still water cylinder, and the sewage is in a static state in the still water cylinder. The oil in the still water cylinder has sufficient time to rise and separate from the sewage. The interface between the sewage and the oil in the still water cylinder is located at the bottom of the siphon disc. Since the hydrophobic and oleophilic material is the infiltration material of the oil instead of the infiltration material of the sewage, the siphon disc will produce a siphon phenomenon for the oil but not for the water. The oil rises to the top of the siphon disc and flows out under the siphon action. The separated oil is then distilled to distill out the water to obtain a qualified oil product, and the oil in the water is also separated to avoid water pollution. The present application also uses high-efficiency activated carbon to adsorb the distilled harmful gases. Avoid harmful gases from polluting the atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a schematic diagram of the structure of the present invention; Attached Figure 2 is a schematic diagram of the structure of the ultrasonic component in the present invention; Attached Figure 3 It is a structural schematic diagram of the water collecting and distributing device in the present invention; Attached Figure 4 Yes Figure 3 AA cross-section diagram.

[0014] In the figure, 1 is a separation tower, 101 is a separation cylinder, 102 is a contraction cylinder, 103 is a still water cylinder, 104 is a water level control cofferdam, 105 is a water collection cofferdam, 106 is an oil collection cofferdam, 2 is an inlet pipe, 3 is an inlet water pump, 4 is an inlet water distributor, 5 is a water collection distributor, 501 is a main water distribution pipe, 502 is a branch water distribution pipe, 503 is a water collection pipe, 504 is a blind plate A, 505 is a blind plate B, 6 is an ultrasonic component, 601 is an outer cylinder, 602 is an inner cylinder, 603 is a support member, 7 is an outlet pipe, 8 is a xylene recovery pipe, 9 is a liquid level switch, 10 is a distillation tank, 11 is a heat transfer oil circulation pipe, 12 is a steam outlet pipe, 13 is an adsorption tank, 14 is an aeration distributor, 15 is an air compressor, 16 is an ultrasonic vibrator, 17 is a siphon, 18 is an exhaust pipe, 19 is a reflux pipe. Detailed implementation mode

[0015] As Figures 1 to 4 shown, a separation device for petroleum mixed xylene includes a separation tower 1. The separation tower 1 includes a cylindrical separation cylinder 101 at the lower part, a conical contraction cylinder 102 at the upper part of the separation cylinder 101, and a cylindrical still water cylinder 103 at the upper part of the contraction cylinder 102. An inlet pipe 2 is provided at the lower part of the separation cylinder 101. The inlet pipe 2 is connected to an inlet water pump 3, and the outlet of the inlet water pump 3 is connected to an inlet water distributor 4. A vibration component 6 and a water collection distributor 5 are successively arranged above the inlet water distributor 4 in the separation cylinder 101. An oil collection cofferdam 106 is provided at the upper part of the still water cylinder 103. A water level control cofferdam 104 is provided outside the oil collection cofferdam 106 in the still water cylinder 103, and a water collection cofferdam 105 is provided outside the water level control cofferdam 104. The water collection distributor 5 is connected to the bottom of the water level control cofferdam 104 by a pipeline, and an outlet pipe 7 is provided at the lower part of the water collection cofferdam 105; The mixed xylene (hereinafter referred to as oil) enters the separation cylinder 101 from the bottom. The inlet water distributor 4 makes the sewage rise evenly on the cross-section of the separation cylinder 101, and the water flow velocity is small. The rising water flow passes through the ultrasonic vibration of the ultrasonic component 6. Under the cavitation effect of the ultrasonic wave, the fine oil droplets gather to form large oil droplets. Since the water collection speed of the water collection distributor 5 is lower than the rising speed of the oil droplets, the oil droplets and the sewage continue to rise and enter the still water cylinder 103. The separated sewage enters the water level control cofferdam 104. The liquid level of the still water cylinder 103 is determined by the water level control cofferdam 104. The sewage is in a static state in the still water cylinder 103, and the oil in the still water cylinder 103 has sufficient time to rise and separate from the sewage.

[0016] A reflux pipe 19 is provided at the bottom of the oil collection cofferdam 106 and is connected to the lower part of the distillation tank 10. A xylene recovery pipe 8 is provided at the bottom of the distillation tank 10. Electric valves are installed on both the reflux pipe 19 and the xylene recovery pipe 8. Two liquid level switches 9 are provided on the oil collection cofferdam 106. A steam outlet pipe 12 is provided at the top of the distillation tank 10, and a heat transfer oil circulation pipe 11 is provided in the distillation tank 10.

[0017] When the liquid level in the oil collection cofferdam 106 is high, the liquid level switch 9 controls the opening of the electric valve of the reflux pipe 19, and the oil flowing out of the oil collection cofferdam 106 enters the distillation tank 10. The distillation tank 10 is filled with heat-conducting oil at 120°C to distill the oil. At this time, the water in the oil is distilled out. After the distillation is completed, opening the electric valve of the xylene recovery pipe 8 can obtain qualified xylene.

[0018] A capillary disk 17 is provided at the top of the stilling cylinder 103. The siphon disk 17 is made of a capillary material that is hydrophobic and lipophilic. The top of the water level control cofferdam 104 is flush with the bottom surface of the siphon disk 17, that is, the interface between the sewage and the oil in the stilling cylinder 103 is located at the bottom of the siphon disk 17. Since the hydrophobic and lipophilic material is a wetting material for oil rather than sewage, the siphon disk 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 disk 17 and flows out under the siphon action.

[0019] The ultrasonic component 6 is composed 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 an annular 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.

[0020] 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 stilling cylinder 103 for internal circulation, and then flows out of the stilling cylinder 103. The diameter of the stilling 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 stilling cylinder 103, making the activity of the oil in the stilling cylinder 103 increase, which is beneficial to the separation from the sewage.

[0021] The water inlet distributor 4 has the same structure as the water collection distributor 5. The water collection distributor 5 includes a water distribution main pipe 501. A blind plate A 504 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 "feng" character structure. A blind plate B 505 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 upward, 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.

[0022] 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 disk 17. Through the aeration effect, the oil adheres to the surface of the bubbles and rises rapidly to separate from the sewage.

[0023] An adsorption tank 13 is connected in series to the steam outlet pipe 12. The adsorption tank 13 is filled with high-efficiency activated carbon to adsorb the harmful gases distilled out, thus avoiding air pollution by harmful gases.

[0024] The effective volume of the oil collection cofferdam 106 is two-thirds of that of the distillation tank 10.

Claims

1. A separation device for petroleum-mixed xylene, comprising a separation tower (1), characterized in that: The separation tower (1) includes a lower cylindrical separation cylinder (101), an upper conical contraction cylinder (102) of the separation cylinder (101), and an upper cylindrical still water cylinder (103) of the contraction cylinder (102). A water inlet pipe (2) is provided at the lower part of the separation cylinder (101), and the water inlet pipe (2) is connected to a water inlet pump (3). The outlet of the water inlet pump (3) is connected to a water inlet distributor (4). A vibration assembly (6) and a water collection distributor (5) are successively provided above the water inlet distributor (4) in the separation cylinder (101). An oil collection cofferdam (106) is provided at the upper part of the still water cylinder (103). A water level control cofferdam (104) is provided outside the oil collection cofferdam (106) in the still water cylinder (103). A water collection cofferdam (105) is provided outside the water level control cofferdam (104). The water collection distributor (5) is connected by a pipeline to the bottom of the water level control cofferdam (104). A water outlet pipe (7) is provided at the lower part of the water collection cofferdam (105); A reflux pipe (19) is provided at the bottom of the oil collection cofferdam (106) and is connected to the lower part of a distillation tank (10). A xylene recovery pipe (8) is provided at the bottom of the distillation tank (10). Electric valves are installed on both the reflux pipe (19) and the xylene recovery pipe (8). Two level switches (9) are provided on the oil collection cofferdam (106), one above the other. A steam outlet pipe (12) is provided at the top of the distillation tank (10). A heat transfer oil circulation pipe (11) is provided inside the distillation tank (10).

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

3. The separation device of petroleum mixed xylene according to claim 1, characterized in that: The ultrasonic assembly (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 an annular 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.

4. The separation device of petroleum mixed xylene according to claim 1, characterized in that: The heat transfer oil circulation pipe (11) enters from the top of the distillation tank (10), flows out from the bottom of the distillation tank (10), then enters the still water cylinder (103) for internal circulation, and then flows out of the still water cylinder (103).

5. The separation device of petroleum mixed xylene according to claim 1, characterized in that: The water inlet distributor (4) has the same structure as the water collection distributor (5). The water collection distributor (5) includes a water distribution main pipe (501). A blind plate A (504) 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 "丰" character structure. A blind plate B (505) is welded at the end of the water collection branch pipe (502). Water collection pipes (503) are uniformly arranged on the water distribution branch pipes (502). The water collection pipes (503) open upward, 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.

6. The separation device of petroleum mixed xylene according to claim 1, characterized in that: The separation cylinder (101) is provided with an aeration distributor (14) between the water inlet distributor (4) and the vibration assembly (6); the aeration distributor (14) is connected to an air compressor (15); and an exhaust pipe (18) is provided on the siphon disc (17).

7. The separation device of petroleum mixed xylene according to claim 1, characterized in that: An adsorption tank (13) is connected in series to the steam outlet pipe (12), and the adsorption tank (13) is filled with high-efficiency activated carbon.

8. The separation device of petroleum mixed xylene according to claim 1, characterized in that: The effective volume of the oil collecting weir (106) is two thirds of the distillation tank (10).

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