Crude benzol oil water separation integrated device

Abstract

The present application belongs to the technical field of coke-making chemical product recovery in metallurgical coking industry, and particularly relates to a crude benzene oil-water separation integrated device, characterized in that: the device comprises an oil-water separation zone, an oil phase collection zone and a water phase collection zone, the partitioning plate is annular, and the oil-water separation zone in the middle and the oil phase collection zone surrounding the oil-water separation zone are formed; a crude benzene flow guide weir is arranged between the top of the partitioning plate and the oil phase collection zone; a flow guide expansion head and a flow guide baffle are arranged at the bottom of the inlet liquid guide pipe, and a dispersed flow channel in the horizontal circumferential direction is formed between the flow guide expansion head and the flow guide baffle; a flow guide collector is arranged on the water outlet pipe at the bottom of the oil-water separation zone, and the separated water is collected through the horizontal drainage from the periphery. The present application has the beneficial effects that the existing crude benzene oil-water separation process is improved, the oil-water separation and reflux are integrated, the equipment integrated device saves the land occupation, simplifies the process flow, and is convenient to operate and maintain.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coking chemical product recovery in the metallurgical coking industry, and particularly relates to a crude benzene oil-water separation integrated device. BACKGROUND

[0002] Currently, coking plants generally use a distillation method of introducing a third component water vapor to produce crude (or light) benzene. The benzene vapor distilled from the top of the tower is cooled to obtain a crude benzene oil-water mixture. The crude benzene and water need to be separated to obtain crude benzene, part of which is used as the overhead reflux of the benzene removal 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 gravity or centrifugal force in the separator.

[0003] The traditional separation of crude benzene oil-water mixture is completed by three independent devices, namely an oil-water separator, a control separator, and a reflux tank. This method has large equipment investment, large land occupation, complex process, easy flow deviation, and multiple tail gas recovery points. A coalescence crude benzene oil-water separator is disclosed in Chinese Utility Model Patent No. 2017210043784, which includes a cylinder, a coalescer installed in the cylinder, an annular liquid distribution pipe, and a drainage guide pipe. A raw material inlet is arranged in the middle of the cylinder, 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. The separated water outlet is connected to the upper end of the drainage guide pipe, and the lower end of the drainage guide pipe extends into the bottom space of the cylinder after passing through the coalescer. The scheme allows small water droplets in the crude benzene after the benzene removal tower to be adsorbed on the surface of the coalescer, form large water droplets, and then separate from the coalescer by gravity and crude benzene. However, this method has the disadvantages of complex external structure and inconvenient maintenance, cleaning, and maintenance of the coalescer device.

[0004] Chinese Invention Patent No. 202311615527.0 discloses a flow guide type crude benzene oil-water separation device and method. The device includes a shell, a partitioning plate arranged in the shell, an inlet liquid guide pipe, and a flow guide collector. The partitioning plate separates the shell into an oil-water separation zone and an oil phase collection zone, and the two are connected in the top gas phase. The middle part of the oil-water separation zone is provided with an inlet liquid guide pipe, and the inlet liquid guide pipe is provided with a feeding hole. The upper part of the oil-water separation zone is provided with a separated water outlet on one side. The flow guide collector is composed of a flow guide pipe and a collector. The collector is arranged at the bottom of the oil-water separation zone, and the collector is connected to the separated water outlet through the flow guide pipe. The top of the partitioning plate is provided with a crude benzene flow guide weir, and the lower part of the oil phase collection zone is provided with a crude benzene outlet. The device has a simple structure and a reasonable layout, and can avoid the flow dead zone of the water phase and the oil phase. However, the water phase collection zone still needs to be arranged separately, which occupies a large area and has a complex process. SUMMARY

[0005] The purpose of the present application is to provide a crude benzene oil-water separation integrated device, overcome the shortcomings of the prior art, improve the existing crude benzene oil-water separation process, integrate oil-water separation and reflux, simplify the tail gas collection point to one place, ensure the quality of crude (light) benzene products, simplify the process, save land occupation, save investment, make the internal structure layout more reasonable, and avoid fluid flow dead zones.

[0006] To achieve the above-mentioned purpose, the present application realizes the following technical solutions:

[0007] A crude benzene oil-water separation integrated device, comprising a shell and a partitioning plate, an inlet liquid guide pipe and a flow guide collector arranged in the shell; the partitioning plate divides the internal space of the shell into an oil-water separation zone and an oil phase collection zone, and the top of the oil-water separation zone is in communication with the oil phase collection zone; the middle part of the oil-water separation zone is provided with the inlet liquid guide pipe, and a crude benzene oil-water mixture pipeline enters the internal space of the oil-water separation zone through the inlet liquid guide pipe; the flow guide collector is composed of a flow guide pipe, a flow guide collector horn and a flow guide outlet, and the flow guide collector horn is arranged at the bottom of the oil-water separation zone; a crude benzene outlet is arranged on the lower part of the shell of the oil phase collection zone, and the device comprises the oil-water separation zone, the oil phase collection zone and a water phase collection zone; wherein: the partitioning plate is annular, surrounds the oil-water separation zone and the oil phase collection zone, and the top of the oil-water separation zone is provided with a sealing plate, and a gas phase compartment is formed between the sealing plate and the shell; a crude benzene flow guide weir is arranged between the top of the partitioning plate and the oil phase collection zone; the water phase collection zone is arranged on the shell outside the oil phase collection zone, the top of the water phase collection zone is provided with a sight glass, the water phase collection zone and the oil phase collection zone are in communication through a gas phase communication hole, the flow guide outlet is located in the water phase collection zone, and the lower part of the water phase collection zone is provided with a separated water outlet; the inlet liquid guide pipe is vertically inserted into the middle part of the oil-water separation zone from the top of the shell, the bottom of the inlet liquid guide pipe is provided with a flow guide enlarged head and a flow guide baffle, and a horizontal circumferential direction dispersion flow channel is formed between the flow guide enlarged head and the flow guide baffle.

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

[0009] Further, the crude benzene flow guide weir is a zigzag annular belt.

[0010] Further, the ratio between the diameter of the flow guide collector horn and the diameter of the shell is 0.75-0.9:1.

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

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

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

[0014] Further, the lower part of the shell is provided with a side manhole.

[0015] Further, the lower part of the shell corresponding to the oil-water separation zone is provided with a vent.

[0016] Further, the outer side wall of the oil phase collection zone is provided with a full-flow port and a liquid level meter interface, and the liquid level meter interface is connected with a liquid level meter.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] 1) The existing crude benzene oil-water separation process is improved, the oil-water separation and reflux are integrated, the equipment integration device saves the land occupation, simplifies the operation process, and saves the investment;

[0019] 2) The tail gas collection point is simplified to one place, while ensuring the quality of the crude (light) benzene product, the internal structure layout is more reasonable, and the fluid flow dead zone is avoided. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0022] Figure 3 is a structural schematic diagram of a crude benzene flow guide weir in an embodiment of the present application.

[0023] In the figure: 1-shell, 2-divisional partition, 3-inlet liquid guide pipe, 4-flow guide collector, 5-oil-water separation zone, 6-oil phase collection zone, 7-gas phase diffusion port, 8-flow guide pipe, 9-flow guide collection horn, 10-flow guide outlet, 11-crude benzene outlet, 12-water phase collection zone, 13-sealing plate, 14-gas phase compartment, 15-crude benzene flow guide weir, 16-view mirror, 17-gas phase communication hole, 18-separation water outlet, 19-flow guide expansion head, 20-flow guide baffle, 21-dispersed flow channel, 22-interface meter interface, 23-top manhole, 24-side manhole, 25-vent, 26-full-flow port, 27-liquid level meter interface. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be described below in conjunction with specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, specific examples needed to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific examples described below are some embodiments of the present application, and other embodiments can also be obtained by those skilled in the art without creative effort on the basis of these specific examples.

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

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

[0028] The partitioning baffle 2 is annular, which encloses the oil-water separation zone 5 in the middle and the oil phase collection zone 6 around the oil-water separation zone 5. An end plate 13 is arranged at the top of the oil-water separation zone 5, and a gas phase compartment 14 is formed between the end plate 13 and the shell 1. A crude benzene flow guide weir 15 is arranged between the top of the partitioning baffle 2 and the oil phase collection zone 6, which is helpful for observing the water flow. The water phase collection zone 12 is arranged on the shell 1 outside the oil phase collection zone 6. A sight glass 16 is arranged at the top of the water phase collection zone 12. The water phase collection zone 12 is connected to the oil phase collection zone 6 through a gas phase communication hole 17. The flow guide outlet 10 is located in the water phase collection zone 12. A separated water outlet 18 is arranged at the lower part of the water phase collection zone 12. As the treatment capacity of the crude benzene oil-water mixture increases, the water level in the oil-water separation zone 5 becomes higher and higher. Under the pressure of the mixture, the separated water is pressed into the flow guide collector 4 and flows into the water phase collection zone 12 from the flow guide outlet 10. The collected separated water is finally discharged from the separated water outlet 18.

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

[0030] The lowest part of the oil phase collection zone 6 is higher than the upper limit of the oil-water interface of the oil-water separation zone 5. In order to prevent the oil layer from flowing, the coarse benzene flow guide weir 15 is a zigzag ring belt. The interface meter interface 22 is provided on the outer wall of the shell 1 corresponding to the upper limit and the lower limit of the interface, and the interface meter interface 22 is connected with the interface meter. The ratio between the diameter of the flow guide collection horn 9 and the diameter of the shell 1 is 0.75-0.9:1, which stabilizes the flow of water, avoids the fluctuation of the phase interface, facilitates the lateral flow of liquid, is beneficial to separation and avoids the occurrence of water phase flow dead zone. The expansion overflow device is arranged on the separated water outlet 18.

[0031] In order to facilitate maintenance, the top of the oil phase collection zone 6 is provided with a top manhole 23. The lower part of the shell 1 is provided with a side manhole 24. The lower part of the shell 1 corresponding to the oil-water separation zone 5 is provided with a vent 25. The outer side wall of the oil phase collection zone 6 is provided with a full-flow port 26 and a liquid level meter interface 27, and the liquid level meter interface 27 is connected with a liquid level meter.

[0032] When the embodiment of the present application is used, the inlet guide pipe 3 is vertically inserted into the interface layer height inside the cylinder, the flow guide expansion head 19 and the flow guide baffle 20 make the liquid flow laterally at low speed to the oil-water separation zone, and the density difference and mutual incompatibility of oil and water are used to separate them, the interface meter interface 22 connected with the interface meter is used to observe the separation layer, and the oil layer is on the top. When the oil layer overflows the coarse benzene flow guide weir 15, it enters the oil phase collection zone 6 inside, the coarse benzene is discharged from the coarse benzene outlet 11, and the coarse benzene that cannot be discharged in time can be discharged to the venting equipment through the full-flow port 26 in the accident state.

[0033] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A crude benzol oil-water separation integrated device, comprising a shell, a partitioning plate arranged in the shell, an inlet liquid guide pipe and a flow guide collector; the partitioning plate separates the internal space of the shell into an oil-water separation zone and an oil phase collection zone, the top of the oil-water separation zone is in communication with the oil phase collection zone; the middle of the oil-water separation zone is provided with the inlet liquid guide pipe, and a crude benzol oil-water mixture pipeline enters the internal space of the oil-water separation zone through the inlet liquid guide pipe; the flow guide collector is composed of a flow guide pipe, a flow guide collection horn and a flow guide outlet, the flow guide collection horn is arranged at the bottom of the oil-water separation zone; a crude benzol outlet is arranged on the shell at the lower part of the oil phase collection zone, and the device is characterized in that: The device comprises an oil-water separation zone, an oil phase collection zone and a water phase collection zone, wherein: The partitioning plate is annular, forming an oil-water separation zone in the middle and an oil phase collection zone surrounding the oil-water separation zone, and the top of the oil-water separation zone is provided with a sealing plate, and a gas phase chamber is formed between the sealing plate and the shell; a coarse benzene flow guide weir is arranged between the top of the partitioning plate and the oil phase collection zone; The water phase collection zone is arranged on the shell outside the oil phase collection zone, the top of the water phase collection zone is provided with a sight glass, the water phase collection zone and the oil phase collection zone are connected through a gas phase communication hole, the flow guide outlet is located in the water phase collection zone, and the lower part of the water phase collection zone is provided with a separated water outlet; The inlet liquid guide pipe is vertically inserted into the middle of the oil-water separation zone from the top of the shell, and the bottom of the inlet liquid guide pipe is provided with a flow guide expansion head and a flow guide baffle, and the flow guide expansion head and the flow guide baffle form a dispersed flow channel in the horizontal circumferential direction; The lowest part of the oil phase collection zone is higher than the upper limit of the oil-water interface of the oil-water separation zone; the ratio between the diameter of the flow guide collection horn and the diameter of the shell is 0.75-0.9:

1.

2. The integrated crude benzol oil and water separation device according to claim 1, characterized in that, The coarse benzene flow guide weir is a zigzag annular belt.

3. The integrated crude benzol oil and water separation device according to claim 1, characterized in that, The separated water outlet is provided with an expansion overflow device, and the top is provided with a glass sight glass observation port.

4. The integrated crude benzol oil and water separation device according to claim 1, characterized in that, The shell outer wall is provided with interface meter interfaces corresponding to the upper limit and lower limit of the oil-water interface, and the interface meter interfaces are connected with interface meters.

5. The integrated crude benzol oil and water separation device according to claim 1, characterized in that, The top of the oil phase collection zone is provided with a top manhole.

6. The integrated crude benzol oil and water separation device according to claim 1, characterized in that, The lower part of the shell is provided with a side manhole.

7. The integrated crude benzol oil and water separation device according to claim 1, characterized in that, The lower part of the shell corresponding to the oil-water separation zone is provided with a vent.

8. The integrated crude benzol oil and water separation device according to claim 1, characterized in that, The outer wall of the oil phase collection zone is provided with a full-flow port and a liquid level meter interface, and the liquid level meter interface is connected with a liquid level meter.

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