A vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device

Abstract

This application provides a vacuum carbonate coke oven gas desulfurization absorbent oil removal device, relating to the field of desulfurization absorbent oil removal technology. It includes a gas-liquid separator, an oil removal tank, and a condensate tank. A conveying pipe is installed between the gas-liquid separator and the oil removal tank, and an overflow pipe is installed between the oil removal tank and the condensate tank. An oil drain pipe is installed at the bottom of the oil removal tank, and a first control valve is installed on the oil drain pipe. In use, the acidic gas from the top of the vacuum carbonate desulfurization process regeneration tower is condensed and sent to the gas-liquid separator. The condensate discharged from the gas-liquid separator enters the interior of the oil removal tank through the conveying pipe. Inside the oil removal tank, impurities such as naphthalene and acenaphthene are separated by gravity. The impurities are deposited at the bottom of the tank, and the oily liquid is discharged through the oil drain pipe. The purified condensate overflows through the overflow pipe and is sent back to the condensate tank for recycling, thereby preventing the gradual accumulation of oily impurities in the circulation system.

Description

Technical Field

[0001] This application relates to the field of desulfurization absorbent oil removal technology, and more specifically, to a vacuum carbonate coke oven gas desulfurization absorbent oil removal device. Background Technology

[0002] The vacuum carbonate desulfurization process for coke oven gas uses sodium carbonate or potassium carbonate as adsorbents to remove hydrogen sulfide from the coke oven gas. The main process flow is as follows: the gas entering the desulfurization tower comes into countercurrent contact with the lean liquid from the regeneration tower from bottom to top. Acidic gases such as H2S and HCN in the gas are absorbed. The alkaline washing section sprays NaOH solution to further remove H2S from the gas. The desulfurized gas is sent to the next user. The rich desulfurization liquid that has absorbed acidic gases enters the regeneration tower for regeneration. Through heating, acidic components such as H2S and HCN are desorbed from the rich liquid. The desulfurized lean liquid generated after desorption in the regeneration tower is pumped out by the lean liquid pump and sent to the rich and lean liquid heat exchanger for heat exchange and the lean liquid cooler for cooling before entering the desulfurization tower for recycling. The acidic gas coming out of the top of the regeneration tower is condensed, and about 10%-20% of the condensate in the circulation system is sent back to the circulation system. The non-condensable acidic gas is sent to the sulfur recovery unit by a vacuum pump to produce sulfur or sulfuric acid products.

[0003] During the operation of the equipment, oily impurities such as naphthalene, tar, and acenaphthene that were not completely removed in the previous process will gradually accumulate in the circulation system, causing problems such as reduced desulfurization effect and blockage of pipelines and equipment. Summary of the Invention

[0004] The purpose of this application is to provide a vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device, which can solve the technical problem of oil enrichment in the gas desulfurization circulation system.

[0005] This application provides a vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device, including a gas-liquid separator, an oil removal tank, and a condensate tank. A conveying pipe is provided between the gas-liquid separator and the oil removal tank, and an overflow pipe is provided between the oil removal tank and the condensate tank. An oil drain pipe is provided at the bottom of the oil removal tank, and a first control valve is provided on the oil drain pipe.

[0006] Preferably, the drain pipe is connected to a U-shaped pipe, the U-shaped pipe is connected to an outlet pipe, and a second control valve is provided on the outlet pipe.

[0007] Preferably, a first sight glass is provided on the outlet pipe.

[0008] Preferably, the oil drain pipe is connected to a first purge pipe, and a third control valve is provided on the first purge pipe.

[0009] Preferably, the delivery pipe is provided with a second sight glass and a fourth control valve.

[0010] Preferably, a baffle is provided at the upper part of the interior of the degreasing tank, and the baffle is located between the conveying pipe and the overflow pipe.

[0011] Preferably, the degreasing tank is provided with a balance pipe, and the balance pipe is provided with a balance valve.

[0012] Preferably, the degreasing tank is provided with a second purge pipe, and the second purge pipe is provided with a fifth control valve.

[0013] The beneficial effects of this utility model are:

[0014] When the vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device provided by this utility model is in use, the acidic gas coming out of the top of the regeneration tower of the vacuum carbonate desulfurization process is condensed and sent to the gas-liquid separator. The condensate discharged from the gas-liquid separator enters the interior of the oil removal tank through the conveying pipe. Inside the oil removal tank, the condensate separates impurities such as naphthalene and acenaphthene by gravity. The impurities are deposited at the bottom of the tank, and the oily liquid is discharged through the oil drain pipe. The purified condensate overflows through the overflow pipe and is sent to the condensate tank for recycling, thereby avoiding the gradual accumulation of oily impurities in the circulation system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] The reference numerals in the attached figures are as follows:

[0018] 1. Gas-liquid separator; 2. Oil removal tank; 3. Condensate tank; 4. Delivery pipe; 5. Overflow pipe; 6. Oil drain pipe; 7. First control valve; 8. U-tube; 9. Outlet pipe; 10. Second control valve; 11. First sight glass; 12. First purge pipe; 13. Third control valve; 14. Second sight glass; 15. Fourth control valve; 16. Baffle plate; 17. Balance pipe; 18. Balance valve; 19. Second purge pipe; 20. Fifth control valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Example

[0026] like Figure 1 As shown in the figure, this application provides a vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device, including a gas-liquid separator 1, an oil removal tank 2 and a condensate tank 3. A conveying pipe 4 is provided between the gas-liquid separator 1 and the oil removal tank 2. An overflow pipe 5 is provided between the oil removal tank 2 and the condensate tank 3. An oil drain pipe 6 is provided at the bottom of the oil removal tank 2. A first control valve 7 is provided on the oil drain pipe 6.

[0027] In operation, the acidic gas from the top of the regeneration tower of the vacuum carbonate desulfurization process is condensed, and about 10%-20% of the condensate in the circulation system is discharged from the gas-liquid separator 1. The condensate discharged from the gas-liquid separator 1 enters the interior of the oil removal tank 2 through the conveying pipe 4. Inside the oil removal tank 2, impurities such as naphthalene and acenaphthene are separated by gravity. The impurities are deposited at the bottom of the oil removal tank 2, and the oily liquid is discharged through the oil drain pipe 6. The purified condensate overflows through the overflow pipe 5 and is sent to the condensate tank 3 for recycling, thereby avoiding the gradual accumulation of oily impurities in the circulation system. This device operates by gravity flow due to elevation difference, does not require additional power, and only separates 10%-20% of the condensate in the circulation system. It has a small separation load, simple structure, and low cost.

[0028] In this embodiment, in order to prevent the intake of external air, the oil drain pipe 6 is connected to a U-shaped pipe 8. The U-shaped pipe 8 stores liquid to form a U-shaped liquid seal. The U-shaped pipe 8 is connected to an outlet pipe 9. The oil is discharged through the outlet pipe 9. A second control valve 10 is provided on the outlet pipe 9.

[0029] In this embodiment, a first viewing mirror 11 is provided on the outlet pipe 9. The first viewing mirror 11 helps to observe the separation effect.

[0030] In this embodiment, in order to prevent the oil drain pipe 6 from becoming blocked, the oil drain pipe 6 is connected to a first purge pipe 12. A third control valve 13 is provided on the first purge pipe 12. When in use, the third control valve 13 is opened, and steam is blown into the exhaust pipe through the first purge pipe 12 to clear the blockage.

[0031] In this embodiment, a second sight glass 14 and a fourth control valve 15 are provided on the delivery pipe 4. When there is a leak, air bubbles will appear in the second sight glass 14, which helps to detect the leak point in time.

[0032] In this embodiment, a baffle 16 is provided at the upper part of the inside of the oil removal tank 2. The baffle 16 is located between the conveying pipe 4 and the overflow pipe 5. The baffle 16 helps to enhance the separation effect.

[0033] In this embodiment, in order to maintain pressure balance, a balance pipe 17 is provided on the oil removal tank 2. The balance pipe 17 is connected to the gas-liquid separator 1, and a balance valve 18 is provided on the balance pipe 17.

[0034] In this embodiment, in order to prevent the outlets of the oil removal tank 2 from becoming blocked, a second purge pipe 19 is provided on the oil removal tank 2, and a fifth control valve 20 is provided on the second purge pipe 19. When in use, the fifth control valve 20 is opened, and steam is blown in through the second purge pipe 19 to clear the blockages at each outlet of the oil removal tank 2.

[0035] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for removing oil from a vacuum carbonate coke oven gas desulfurization absorption solution, characterized in that: It includes a gas-liquid separator, an oil removal tank, and a condensate tank. A conveying pipe is provided between the gas-liquid separator and the oil removal tank, and an overflow pipe is provided between the oil removal tank and the condensate tank. An oil drain pipe is provided at the bottom of the oil removal tank, and a first control valve is provided on the oil drain pipe.

2. The vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device according to claim 1, characterized in that: The drain pipe is connected to a U-shaped pipe, the U-shaped pipe is connected to an outlet pipe, and a second control valve is installed on the outlet pipe.

3. The oil removal device for vacuum carbonate gas desulfurization absorption solution of claim 2, characterized in that: A first sight glass is installed on the outlet pipe.

4. The vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device according to claim 1, characterized in that: The oil drain pipe is connected to a first purge pipe, and a third control valve is installed on the first purge pipe.

5. The oil removal device for vacuum carbonate gas desulfurization absorption solution of claim 1, characterized in that: The delivery pipe is equipped with a second sight glass and a fourth control valve.

6. The vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device according to claim 1, characterized in that: The upper part of the degreasing tank is provided with a baffle plate, which is located between the conveying pipe and the overflow pipe.

7. The oil removal device for vacuum carbonate gas desulfurization absorption solution of claim 1, characterized in that: The degreasing tank is equipped with a balance pipe, and the balance pipe is equipped with a balance valve.

8. The vacuum carbonate coke oven gas desulfurization absorption liquid oil removal device according to claim 1, characterized in that: The oil removal tank is equipped with a second purge pipe, and the second purge pipe is equipped with a fifth control valve.

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