Crude benzene oil-water separation integrated device

Abstract

The utility model belongs to the technical field of recovery of coking chemical products in the metallurgical coking industry, and particularly relates to a crude benzene oil-water separation integrated device which is characterized by comprising an oil-water separation area, an oil phase collection area and a water phase collection area, and a partition plate is annular and defines the oil-water separation area in the middle and the oil phase collection area surrounding the oil-water separation area; a crude benzene diversion weir is arranged between the periphery of the top of the partition plate and the oil phase collecting region; a flow guide expansion head and a flow guide baffle are arranged at the bottom of the inlet liquid guide pipe, and a dispersion flow channel in the transverse circumferential direction is formed between the flow guide expansion head and the flow guide baffle; a drainage pipe at the bottom of the oil-water separation area is provided with a diversion collector for transversely draining and collecting separated water from the periphery. The crude benzene oil-water separation device has the beneficial effects that the existing crude benzene oil-water separation process is improved, oil-water separation and reflux are integrated, and the equipment integration device saves the occupied area, simplifies the process flow and is convenient to operate and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of coking chemical product recovery in the metallurgical coking industry, and particularly relates to an integrated device for separating crude benzene from oil and water. Background Art

[0002] At present, coking plants generally adopt a distillation method of introducing a third component of water vapor to produce crude (or light) benzene. After the benzene vapor distilled from the top of the tower is cooled, a crude benzene oil-water mixture is obtained, and the crude benzene and water need to be separated. A part of the obtained crude benzene is used for reflux at the top of the debenzolization tower, and the rest is the crude benzene product. The separation principle of the crude benzene oil-water separator is based on the density difference between oil and water. The density of oil is smaller than that of water, so the two can be separated by the action of gravity or centrifugal force in the separator.

[0003] The traditional separation of crude benzene oil-water mixture is completed by three independent devices: an oil-water separator, a control separator, and a reflux tank. The equipment investment is large, the floor area is large, the process is complex, it is easy to have uneven flow, and there are many tail gas recovery points. The Chinese utility model patent with the application number 2017210043784 discloses a coalescing crude benzene oil-water separator, which includes a cylinder body and a coalescer, an annular liquid distribution pipe, and a drainage conduit installed in the cylinder body; a raw material inlet is arranged in the middle of the cylinder body, and the raw material inlet is connected to the annular liquid distribution pipe; the coalescer is arranged below the annular liquid distribution pipe; a crude benzene outlet and a separated water outlet are arranged at the upper part of the cylinder body, the separated water outlet is connected to the upper end of the drainage conduit, and the lower end of the drainage conduit passes through the coalescer and extends into the bottom space of the cylinder body. This solution enables the small water droplets in the crude benzene after the debenzolization tower to be adsorbed on the surface of the coalescer, form large water droplets and then separate from the coalescer, and then separate from the crude benzene by means of gravity. Its disadvantage is that the external structure is complex, and the maintenance, cleaning, and maintenance of the installed coalescer equipment are inconvenient.

[0004] The Chinese utility model patent with the application number 202311615527.0 discloses a diversion-type crude benzene oil-water separation device and a crude benzene oil-water separation method. The device includes a shell and a partition baffle, an inlet liquid guide pipe, and a diversion collector arranged in the shell; the partition baffle divides the shell into an oil-water separation area and an oil phase collection area, and the two are connected by gas at the top; an inlet liquid guide pipe is arranged in the middle of the oil-water separation area, and a feed hole is arranged on the inlet liquid guide pipe; a separated water outlet is arranged on one side of the upper part of the oil-water separation area, and the diversion collector is composed of a diversion pipe and a collector. The collector is arranged at the bottom of the oil-water separation area, and the collector is connected to the separated water outlet through the diversion pipe; a crude benzene diversion weir is arranged at the top of the partition baffle, and a crude benzene outlet is arranged at the lower part of the oil phase collection area. The device has a simple structure and a reasonable layout, and can avoid the flow dead zones of the water phase and the oil phase. Its disadvantage is that the water phase collection area still needs to be set separately, the floor area is large, and the process is complex. Summary of the Utility Model

[0005] The object of the present utility model is to provide an integrated device for separating crude benzene oil and water, overcoming the deficiencies of the prior art, improving the existing crude benzene oil-water separation process, integrating oil-water separation and reflux into one, simplifying the tail gas collection point to one place, while ensuring the quality of crude (light) benzene products, simplifying the process, saving land occupation, saving investment, making the internal structure layout more reasonable, and avoiding dead zones in fluid flow.

[0006] To achieve the above object, the present utility model is realized through the following technical solutions:

[0007] An integrated device for separating crude benzene oil and water includes a shell, a partition baffle, an inlet liquid guide pipe and a diversion collector arranged inside the shell; the partition baffle divides the internal space of the shell into an oil-water separation area and an oil phase collection area, and the top of the oil-water separation area is connected to the oil phase collection area; an inlet liquid guide pipe is arranged in the middle of the oil-water separation area, and the crude benzene oil-water mixture pipeline enters the inside of the oil-water separation area through the inlet liquid guide pipe; the diversion collector is composed of a diversion pipe, a diversion collection horn and a diversion outlet, and the diversion collection horn is arranged at the bottom of the oil-water separation area; a crude benzene outlet is arranged on the shell at the lower part of the oil phase collection area, including an oil-water separation area, an oil phase collection area and a water phase collection area, wherein: the partition baffle is annular, enclosing the middle oil-water separation area and the oil phase collection area surrounding the oil-water separation area, a sealing plate is arranged at the top of the oil-water separation area, and a gas separation chamber is formed between the sealing plate and the shell above; a crude benzene diversion weir is arranged between the top of the partition baffle and the oil phase collection area for one week; the water phase collection area is arranged on the shell outside the oil phase collection area, a sight glass is arranged at the top of the water phase collection area, the water phase collection area is connected to the oil phase collection area through a gas phase communication hole, the diversion outlet is located in the water phase collection area, and a separated water outlet is arranged at the lower part of the water phase collection area; the inlet liquid guide pipe is vertically inserted into the middle of the oil-water separation area from the top of the shell, and a diversion expansion head and a diversion baffle are arranged at the bottom thereof, and a transverse circumferential dispersion flow channel is formed between the diversion expansion head and the diversion baffle.

[0008] Further, the lowest point of the oil phase collection area is higher than the upper limit of the oil-water interface in the oil-water separation area.

[0009] Further, the crude benzene diversion weir is a serrated ring belt.

[0010] Further, the ratio of the diameter of the diversion collection horn to the diameter of the shell is 0.75 - 0.9:1.

[0011] Further, an expansion overflow device is arranged on the separated water outlet, and a glass sight glass observation port is arranged at the top.

[0012] Further, interface meter interfaces are arranged on the outer wall of the shell corresponding to the upper and lower limits of the oil-water interface, and interface meters are connected to the interface meter interfaces.

[0013] Further, a top manhole is arranged at the top of the oil phase collection area.

[0014] Further, a side manhole is provided at the lower part of the housing.

[0015] Further, a drain opening is provided at the lower part of the housing corresponding to the oil-water separation zone.

[0016] Further, an overflow port and a liquid level gauge interface are provided on the outer side wall of the oil phase collection zone, and the liquid level gauge interface is connected to a liquid level gauge.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1) Improve the existing crude benzene oil-water separation process, integrate oil-water separation and reflux into one, the equipment integration device saves land occupation, simplifies the operation process, and saves investment;

[0019] 2) Simplify the tail gas collection point to one place. While ensuring the quality of the crude (light) benzene product, make the internal structure layout more reasonable and avoid dead zones in fluid flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0021] Figure 2 is Figure 1 a top view of , and the interface orientation can be adjusted according to the piping requirements;

[0022] Figure 3 is a schematic structural diagram of the crude benzene diversion weir in the embodiment of the present utility model.

[0023] In the figure: 1 - housing, 2 - partition baffle, 3 - inlet liquid guide pipe, 4 - diversion collector, 5 - oil-water separation zone, 6 - oil phase collection zone, 7 - gas phase discharge port, 8 - diversion pipe, 9 - diversion collection horn, 10 - diversion outlet, 11 - crude benzene outlet, 12 - water phase collection zone, 13 - sealing plate, 14 - gas separation chamber, 15 - crude benzene diversion weir, 16 - sight glass, 17 - gas phase communication hole, 18 - separated water outlet, 19 - diversion expansion head, 20 - diversion baffle, 21 - dispersed flow channel, 22 - interface gauge interface, 23 - top manhole, 24 - side manhole, 25 - drain opening, 26 - overflow port, 27 - liquid level gauge interface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the specific examples required for the description of the specific embodiments or the prior art. Obviously, the specific examples described below are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other specific examples can be obtained based on these specific examples.

[0026] Generally, the components of the embodiments of the present invention described and shown in the specific examples here can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific examples is not intended to limit the scope of the present invention claimed, but merely represents the selected embodiments of the present invention.

[0027] See Figures 1 - 3 , which is a schematic structural diagram of an embodiment of a crude benzene oil-water separation integrated device of the present invention, including a housing 1 and a partition baffle 2, an inlet liquid guide pipe 3 and a diversion collector 4 arranged in the housing 1; the internal space of the housing 1 is divided into an oil-water separation area 5, an oil phase collection area 6 and a water phase collection area 12. The top of the oil-water separation area 5 is connected to the oil phase collection area 6 through a crude benzene diversion weir 15. A gas discharge port 7 is provided at the top of the housing 1, and the tail gas generated by the system can be collected from the gas discharge port 7; an inlet liquid guide pipe 3 is provided in the middle of the oil-water separation area 5, and one end of the inlet liquid guide pipe 3 extends outside the housing 1 and is connected to a crude benzene oil-water mixture pipeline; the diversion collector 4 is composed of a diversion pipe 8, a diversion collection horn 9 and a diversion outlet 10, and the diversion collection horn 9 is arranged at the bottom of the oil-water separation area 5; a crude benzene outlet 11 is provided on the housing 1 at the lower part of the oil phase collection area 6.

[0028] The partition baffle 2 is annular, enclosing the middle oil-water separation area 5 and the oil phase collection area 6 surrounding the oil-water separation area 5. A sealing plate 13 is provided at the top of the oil-water separation area 5, and a gas separation chamber 14 is formed between the sealing plate 13 and the housing 1 above; a crude benzene diversion weir 15 is provided between the top of the partition baffle 2 and the oil phase collection area 6 in a circle, which helps to observe the water flow situation; the water phase collection area 12 is arranged on the housing 1 outside the oil phase collection area 6. A sight glass 16 is provided at the top of the water phase collection area 12. The water phase collection area 12 is connected to the oil phase collection area 6 through a gas communication hole 17. The diversion outlet 10 is located in the water phase collection area 12. A separated water outlet 18 is provided at the lower part of the water phase collection area 12. As the processing amount of the crude benzene oil-water mixture increases, the water level in the oil-water separation area 5 becomes higher and higher. Under the pressure of the mixture, the separated water is pressed into the diversion collector 4 and flows into the water phase collection area 12 from the diversion outlet 10, and the collected separated water is finally discharged from the separated water outlet 18.

[0029] The inlet liquid guide pipe 3 is vertically inserted from the top of the shell into the middle of the oil-water separation area, and a guide expansion head 19 and a guide baffle 20 are provided at the bottom thereof, and a dispersed flow channel 21 in a transverse circumferential direction is formed between the guide expansion head 19 and the guide baffle 20. The gas phase connecting hole 17 helps to stabilize the gas phase pressure in the separated water area and helps to discharge the separated water smoothly.

[0030] The lowest point of the oil phase collection area 6 is higher than the upper limit of the oil-water interface in the oil-water separation area 5. In order to prevent the oil layer from deviating, the crude benzene diversion weir 15 is a zigzag ring belt. An interface meter interface 22 is provided on the outer wall of the shell 1 corresponding to the upper and lower limits of the oil-water interface, and the interface meter interface 22 is connected to an interface meter. The ratio between the diameter of the diversion collection horn 9 and the diameter of the shell 1 is 0.75-0.9:1, which stabilizes the flow of water, avoids phase interface fluctuations, facilitates the lateral flow of liquid, is conducive to separation and avoids the occurrence of dead zones in the water phase flow. An expansion overflow is provided on the separation water outlet 18.

[0031] For the convenience of maintenance, a top manhole 23 is provided at the top of the oil phase collection area 6. A side manhole 24 is provided at the lower part of the shell 1. A vent 25 is provided at the lower part of the shell 1 corresponding to the oil-water separation area 5. A full flow port 26 and a liquid level gauge interface 27 are provided on the outer side wall of the oil phase collection area 6, and the liquid level gauge interface 27 is connected to the liquid level gauge.

[0032] When the embodiment of the utility model is used, the inlet liquid guide pipe 3 is vertically inserted to the height of the interface layer inside the cylinder, and the guide expansion head 19 and the guide baffle 20 allow the liquid to flow horizontally at a low speed to the oil-water separation area, and the density difference of oil and water and the principle of mutual incompatibility are used to separate the two. The interface meter connected to the interface meter interface 22 is used to observe the separation layer situation, the oil layer is on the top, and when the oil layer overflows over the crude benzene guide weir 15, it enters the oil phase collection area 6, and the crude benzene is discharged from the crude benzene outlet 11. In the event of an accident, the crude benzene that cannot be discharged in time can be discharged from the full flow port 26 to the venting equipment.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated device for separating crude benzene from water and oil, comprising a housing, a partition baffle, an inlet liquid guide pipe and a diversion collector arranged inside the housing; the partition baffle divides the internal space of the housing into an oil-water separation area and an oil-phase collection area, and the top of the oil-water separation area is communicated with the oil-phase collection area; an inlet liquid guide pipe is arranged in the middle of the oil-water separation area, and a crude benzene oil-water mixture pipeline enters the interior of the oil-water separation area through the inlet liquid guide pipe; the diversion collector consists of a diversion pipe, a diversion collection horn and a diversion outlet, and the diversion collection horn is arranged at the bottom of the oil-water separation area; a crude benzene outlet is arranged on the housing at the lower part of the oil-phase collection area, and it is characterized in that: It includes an oil-water separation zone, an oil phase collection zone, and a water phase collection zone, where: The partition baffle is annular, enclosing the middle oil-water separation zone and the oil phase collection zone surrounding the oil-water separation zone. There is a sealing plate at the top of the oil-water separation zone, and a gas separation chamber is formed between the sealing plate and the shell above. A crude benzene diversion weir is provided between the top of the partition baffle and the oil phase collection zone around the circumference; The water phase collection zone is arranged on the shell outside the oil phase collection zone. There is a sight glass at the top of the water phase collection zone. The water phase collection zone is connected to the oil phase collection zone through a gas phase communication hole. The diversion outlet is located in the water phase collection zone, and a separated water outlet is provided at the lower part of the water phase collection zone; The inlet liquid guide pipe is vertically inserted into the middle of the oil-water separation zone from the top of the shell. There is a diversion expansion head and a diversion baffle at the bottom, and a transverse circumferential dispersion flow channel is formed between the diversion expansion head and the diversion baffle.

2. The integrated device for separating crude benzene from oil and water according to claim 1, wherein, The lowest point of the oil phase collection zone is higher than the upper limit of the oil-water interface in the oil-water separation zone.

3. The integrated device for separating crude benzene from oil and water according to claim 1, characterized in that, The crude benzene diversion weir is a serrated ring belt.

4. The integrated device for separating crude benzene from water according to claim 1, wherein The ratio of the diameter of the diversion collection horn to the diameter of the shell is 0.75 - 0.9:

1.

5. The integrated device for separating crude benzene and water according to claim 1, wherein, An expansion overflow device is provided at the separated water outlet, and a glass sight glass observation port is provided at the top.

6. The integrated device for separating crude benzene and water according to claim 1, characterized in that, Interface meter interfaces are provided on the outer wall of the shell corresponding to the upper and lower limits of the oil-water interface, and an interface meter is connected to the interface meter interfaces.

7. A crude benzene oil-water separation integrated device according to claim 1, characterized in that A top manhole is provided at the top of the oil phase collection zone.

8. A crude benzene oil-water separation integrated device according to claim 1, characterized in that, A side manhole is provided at the lower part of the shell.

9. The integrated device for separating crude benzene from water according to claim 1, characterized in that, A vent opening is provided at the lower part of the shell corresponding to the oil-water separation zone.

10. The integrated device for separating crude benzene and water according to claim 1, characterized in that, An overflow port and a liquid level meter interface are provided on the outer side wall of the oil phase collection zone, and a liquid level meter is connected to the liquid level meter interface.

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