Gas-liquid separation device for crude benzene condensation cooler emission gas pipeline

Abstract

The utility model discloses a crude benzene condensation cooler releases gas pipeline gas -liquid separation device, including gas -liquid separation cylinder, the top fixed mounting of gas -liquid separation cylinder has the exhaust pipe, the top fixed mounting of exhaust pipe has the fourth valve, the front end fixed mounting of gas -liquid separation cylinder has the oil gas separator inlet pipe, the one end fixed mounting of oil gas separator inlet pipe away from gas -liquid separation cylinder has the first valve, the bottom fixed mounting of gas -liquid separation cylinder has the separator liquid discharge pipeline, the bottom fixed mounting of separator liquid discharge pipeline has the fifth valve, the bottom fixed mounting of fifth valve has the crude benzene pipeline, the left -hand end fixed mounting of crude benzene pipeline has the second valve, the right -hand end fixed mounting of crude benzene pipeline has the third valve. The utility model through gas -liquid separation cylinder effectively separates gas and liquid, makes the exhaust pipe exhaust smooth, guarantees the benzene removal tower top pressure stability in normal working range, has guaranteed the stable operation of crude benzene distillation system.

Description

Technical Field

[0001] This utility model relates to the technical field of crude benzene distillation system equipment, specifically a gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler. Background Technology

[0002] In the crude benzene distillation process of a coking plant, the crude benzene condenser is a key piece of equipment used to cool and condense the benzene vapor escaping from the top of the benzene stripping tower. During its operation, the crude benzene-water mixture formed after cooling often contains a large amount of non-condensable gases. If these gases cannot be discharged in time, they will seriously hinder the smooth flow of the oil-water mixture, directly causing the pressure of the benzene stripping tower system to rise continuously, affecting the stable operation of the entire distillation process. To solve this problem, conventional designs will install a vent pipe at the top of the condenser to discharge the non-condensable gases and stabilize the tower pressure.

[0003] Because the vent pipe often sprays out a large amount of oil-water mixture rich in crude benzene along with the gas during the discharge, it not only causes the loss of crude benzene products and pollutes the surrounding environment, but also causes the splashed liquid to fall on the surface of high-temperature equipment such as the first and second stage oil-rich and lean oil heat exchangers with a temperature of up to 150°C. Crude benzene is a flammable and explosive hazardous chemical, and its continuous accumulation on high-temperature surfaces can easily cause spontaneous combustion or even instantaneous deflagration accidents, posing a great threat to personnel safety and production equipment. Therefore, we propose a gas-liquid separation device for the vent pipe of crude benzene condenser cooler. Utility Model Content

[0004] The purpose of this invention is to provide a gas-liquid separation device for the vent pipe of a crude benzene condenser cooler, in order to solve the problem mentioned in the background art that when the vent pipe discharges gas, a large amount of oil-water mixture rich in crude benzene is often sprayed out together, which not only causes the loss of crude benzene products and pollutes the surrounding environment, but also causes the sprayed liquid to fall on the surface of nearby high-temperature equipment such as the first and second stage oil-rich and lean oil heat exchangers with temperatures as high as 150°C. Crude benzene is a flammable and explosive hazardous chemical, and its continuous accumulation on high-temperature surfaces can easily cause spontaneous combustion or even instantaneous deflagration accidents, posing a great threat to personnel safety and production equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler, comprising:

[0006] A gas-liquid separator is provided. An exhaust pipe is fixedly installed at the top of the gas-liquid separator, and a fourth valve is fixedly installed at the top of the exhaust pipe. An oil-gas separator inlet pipe is fixedly installed at the front end of the gas-liquid separator, and a first valve is fixedly installed at the end of the oil-gas separator inlet pipe furthest from the gas-liquid separator. A separator drain pipe is fixedly installed at the bottom of the gas-liquid separator, and a fifth valve is fixedly installed at the bottom of the separator drain pipe. A coarse benzene pipe is fixedly installed at the bottom of the fifth valve, a second valve is fixedly installed at the left end of the coarse benzene pipe, and a third valve is fixedly installed at the right end of the coarse benzene pipe. Two partitions and a fixed cylinder are fixedly installed inside the gas-liquid separator.

[0007] In a preferred embodiment of the gas-liquid separation device for the venting gas pipeline of a crude benzene condenser cooler according to this utility model, the gas-liquid separation cylinder is connected to the exhaust pipe, and the exhaust pipe is connected to the fourth valve.

[0008] In a preferred embodiment of the gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler according to this utility model, the gas-liquid separation cylinder is connected to the inlet pipe of the oil-gas separator, and the inlet pipe of the oil-gas separator is connected to the crude benzene pipeline through the first valve.

[0009] In a preferred embodiment of the gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler according to this utility model, the gas-liquid separation cylinder is connected to the separator drain pipeline, and the separator drain pipeline is connected to the crude benzene pipeline through the fifth valve.

[0010] In a preferred embodiment of the gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler according to this utility model, the partition plate has a semi-circular shape and the bottom of the gas-liquid separation cylinder has a conical shape.

[0011] As a preferred embodiment of the gas-liquid separation device for the vent gas pipeline of the crude benzene condenser cooler of this utility model, the fixed cylinder is further provided with:

[0012] The fixed blade is fixedly installed inside the fixed cylinder.

[0013] Compared with the prior art, this utility model provides a gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler, which has the following beneficial effects:

[0014] 1. This utility model effectively separates gas and liquid through a gas-liquid separator, ensuring smooth exhaust from the exhaust pipe, maintaining the pressure at the top of the benzene removal tower within the normal operating range, and guaranteeing the stable operation of the crude benzene distillation system;

[0015] 2. This utility model eliminates liquid splashing by setting up an exhaust pipe, thus preventing benzene liquid from corroding on-site equipment and eliminating the risk of spontaneous combustion and deflagration caused by benzene liquid accumulating on high-temperature equipment, creating a safe working environment for the production site.

[0016] 3. The present invention separates and guides the mixed liquid back into the oil-water separator, realizing the recovery of crude benzene in the liquid, reducing the loss of crude benzene caused by the overflow of condensate, and improving resource utilization and economic benefits. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the gas-liquid separation cylinder of this utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the fixed cylinder of this utility model.

[0020] In the diagram: 1. Gas-liquid separator cylinder; 2. First valve; 3. Second valve; 4. Crude benzene pipe; 5. Third valve; 6. Separator drain pipe; 7. Oil-gas separator inlet pipe; 8. Exhaust pipe; 9. Fourth valve; 10. Fifth valve; 11. Fixed cylinder; 12. Baffle plate; 13. Fixed blade. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 A gas-liquid separation device for a crude benzene condenser cooler vent gas pipeline includes a gas-liquid separation cylinder 1. An exhaust pipe 8 is fixedly installed at the top of the gas-liquid separation cylinder 1, and a fourth valve 9 is fixedly installed at the top of the exhaust pipe 8. An oil-gas separator inlet pipe 7 is fixedly installed at the front end of the gas-liquid separation cylinder 1, and a first valve 2 is fixedly installed at the end of the oil-gas separator inlet pipe 7 away from the gas-liquid separation cylinder 1. A separator drain pipe 6 is fixedly installed at the bottom of the gas-liquid separation cylinder 1, and a fifth valve 10 is fixedly installed at the bottom of the separator drain pipe 6. A crude benzene pipe 4 is fixedly installed at the bottom of the fifth valve 10, a second valve 3 is fixedly installed at the left end of the crude benzene pipe 4, and a third valve 5 is fixedly installed at the right end of the crude benzene pipe 4. Two partitions 12 and a fixed cylinder 11 are fixedly installed inside the gas-liquid separation cylinder 1.

[0023] In this implementation plan: efficient gas-liquid separation is achieved through the gas-liquid separator 1, ensuring that only gas is discharged from the exhaust pipe 8, thereby guaranteeing the stability of the pressure at the top of the benzene removal tower and ensuring the smooth operation of the crude benzene distillation system; at the same time, this design completely eliminates the splashing of benzene-containing liquid, not only avoiding its corrosion to on-site equipment, but also fundamentally eliminating the major safety risks of spontaneous combustion and deflagration caused by the accumulation of benzene liquid on the surface of high-temperature equipment, creating a safe production environment; in addition, the separated liquid is effectively recovered and introduced into the oil-water separator, allowing the crude benzene contained therein to be reused, significantly reducing product loss, thereby simultaneously improving resource utilization and economic benefits.

[0024] Furthermore:

[0025] In an optional embodiment, the gas-liquid separator 1 is connected to the exhaust pipe 8, and the exhaust pipe 8 is connected to the fourth valve 9.

[0026] In this implementation scheme: the connecting structure ensures that the gas purified by the gas-liquid separator 1 can be smoothly guided to the exhaust pipe 8, while the fourth valve 9 installed on the pipeline gives the system precise exhaust control capability. By adjusting the opening of this valve, the system back pressure can be directly controlled, thereby stabilizing the operating pressure at the top of the benzene removal tower and ensuring the stable operation of the entire distillation system.

[0027] Furthermore:

[0028] In an optional embodiment, the gas-liquid separator 1 is connected to the oil-gas separator inlet pipe 7, and the oil-gas separator inlet pipe 7 is connected to the crude benzene pipe 4 through the first valve 2.

[0029] In this implementation scheme: the connection structure allows the gas-liquid mixture from the crude benzene pipe 4 to be stably introduced into the gas-liquid separation cylinder 1 through the oil-gas separator inlet pipe 7 under the control of the first valve 2, realizing the flexible connection and isolation between the device and the main process system, providing the necessary prerequisite for subsequent efficient separation, and facilitating the online commissioning and shut-off maintenance of the device.

[0030] Furthermore:

[0031] In an optional embodiment, the gas-liquid separation cylinder 1 is connected to the separator drain pipe 6, and the separator drain pipe 6 is connected to the crude benzene pipe 4 through the fifth valve 10.

[0032] In this implementation scheme: the connection structure enables the liquid separated in the gas-liquid separator 1 to be stably discharged through the separator drain pipe 6, and smoothly returned to the crude benzene pipe 4 through the regulation of the fifth valve 10, realizing the closed-loop recovery of the separated liquid, which not only effectively avoids liquid accumulation in the equipment, but also ensures the full recovery of crude benzene products and improves resource utilization.

[0033] Furthermore:

[0034] In an optional embodiment, the partition 12 has a semi-circular shape, and the bottom of the gas-liquid separator 1 has a conical shape.

[0035] In this implementation scheme: the semi-circular baffle 12 effectively changes the flow path of the gas-liquid mixture, significantly improving the primary separation efficiency by increasing impact and turbulence; at the same time, the conical bottom structure of the gas-liquid separation cylinder 1 is very conducive to the separated liquid converging towards the center and flowing smoothly, effectively preventing liquid accumulation at the bottom of the container, and together ensuring the continuous and efficient separation process.

[0036] Furthermore:

[0037] In an optional embodiment, the fixing cylinder 11 is further provided with:

[0038] The fixed blade 13 is fixedly installed inside the fixed cylinder 11.

[0039] In this embodiment, the fixed blade 13 guides the airflow to form a rotating flow within the fixed cylinder 11, and utilizes centrifugal force to effectively separate finer droplets in the gas-liquid mixture, significantly improving the device's collection efficiency for mist droplets and thus enhancing the overall separation effect.

[0040] Working Principle: When using the gas-liquid separation device in the vent pipe of the crude benzene condenser cooler, the gas first passes through the second valve 3, the first valve 2, and the oil-gas separator inlet pipe 7 under system pressure, entering the gas-liquid separation cylinder 1 tangentially or radially. Inside the cylinder, the mixture enters the fixed cylinder 11 area, where the fixed blades 13 guide the fluid to rotate, using centrifugal force to further throw the denser droplets towards the cylinder wall. Next, the flow path and velocity of the mixture are again altered by the two semi-circular baffles 12, further causing collision and separation. Subsequently, after the droplets condense on the wall surface, they fall along the inner wall to the conical collection area at the bottom, while the separated clean gas rises. Finally, the gas is discharged through the exhaust pipe 8 at the top and the pipeline controlled by the fourth valve 9, realizing the safe release of non-condensable gas and the stable regulation of the tower top pressure; while the separated liquid is led back to the crude benzene pipeline 4 through the separator drain pipe 6 and under the control of the fifth valve 10. After merging with the main process fluid, it enters the subsequent oil-water separator through the third valve 5, thereby completing the recovery of crude benzene and effectively eliminating the safety and environmental hazards caused by direct venting. This is the working principle of the gas-liquid separation device of the crude benzene condenser venting gas pipeline.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler, characterized in that, include: A gas-liquid separator (1) is provided. An exhaust pipe (8) is fixedly installed on the top of the gas-liquid separator (1). A fourth valve (9) is fixedly installed on the top of the exhaust pipe (8). An oil-gas separator inlet pipe (7) is fixedly installed at the front end of the gas-liquid separator (1). A first valve (2) is fixedly installed at the end of the oil-gas separator inlet pipe (7) away from the gas-liquid separator (1). A separator drain pipe (6) is fixedly installed at the bottom of the gas-liquid separator (1). A fifth valve (10) is fixedly installed at the bottom of the separator drain pipe (6). A coarse benzene pipe (4) is fixedly installed at the bottom of the fifth valve (10). A second valve (3) is fixedly installed at the left end of the coarse benzene pipe (4). A third valve (5) is fixedly installed at the right end of the coarse benzene pipe (4). Two partitions (12) and a fixed cylinder (11) are fixedly installed inside the gas-liquid separator (1).

2. The gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler according to claim 1, characterized in that, The gas-liquid separator (1) is connected to the exhaust pipe (8), and the exhaust pipe (8) is connected to the fourth valve (9).

3. The gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler according to claim 1, characterized in that, The gas-liquid separator (1) is connected to the oil-gas separator inlet pipe (7), and the oil-gas separator inlet pipe (7) is connected to the crude benzene pipe (4) through the first valve (2).

4. The gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler according to claim 1, characterized in that, The gas-liquid separation cylinder (1) is connected to the separator drain pipe (6), and the separator drain pipe (6) is connected to the crude benzene pipe (4) through the fifth valve (10).

5. The gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler according to claim 1, characterized in that, The partition (12) has a semi-circular shape, and the bottom of the gas-liquid separator (1) has a conical shape.

6. The gas-liquid separation device for the vent gas pipeline of a crude benzene condenser cooler according to claim 1, characterized in that, The fixed cylinder (11) is also provided with: Fixed blade (13) is fixedly installed inside the fixed cylinder (11).

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