Benzene removal tower

Abstract

The utility model discloses a debenzolization tower which comprises a debenzolization tower main body, an exhaust pipe is arranged at the top of the debenzolization tower main body, a rich oil inlet pipe is arranged on the side wall of the debenzolization tower main body, a steam pipeline is arranged below the rich oil inlet pipe, the steam pipeline is divided into an inner pipe and an outer pipe, a steam inlet is formed in the outer pipe, and a steam outlet is formed in the outer pipe. The bottom of the outer pipe is communicated with a gas-liquid separation device through a bent pipe, one end of the inner pipe is communicated with the gas-liquid separation device, the inner pipe positioned in the middle of the debenzolization tower main body is provided with a plurality of spray pipes from top to bottom, and tower trays are arranged between the rich oil inlet pipe and the spray pipes. The steam debenzolization device has the beneficial effects that wet steam is introduced into the gas-liquid separation device through the outer pipe of the steam pipeline, condensed water in the wet steam is separated, the dryness of the steam is improved, the dried steam is introduced into the inner pipe, and rich oil in the debenzolization tower is subjected to heat transfer evaporation through the inner pipe, so that the heat conversion efficiency is improved; meanwhile, the wet steam of the outer pipe has a heat preservation effect on the dry steam of the inner pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of benzene removal tower, especially a benzene removal tower. BACKGROUND

[0002] The benzene removal tower is subordinate to the desorption tower, is the operation equipment that lets benzene hydrocarbon dissolved in the washing oil solvent evaporates and releases out through the direct contact heat transfer of the heat carrier, adopts the method that water vapor directly heats to remove benzene from the rich oil.

[0003] Such as Chinese patent publication No. CN220939895U discloses a kind of benzene removal tower, which can be dispersed by shunt into the rich oil of feed pipe flow to tray, at the same time, by steam lance and flat spray head etc. Device is concentrated in the bottom of tray, so that water vapor and rich oil can carry out sufficient heat transfer, which can improve work efficiency and also get pure crude benzene vapor and lean oil from rich oil. But a part of steam loses heat and becomes condensed water in the process of steam transportation in pipe in the above-mentioned benzene removal tower, which reduces the dryness of steam, and wet steam can affect heat conversion efficiency. UTILITY MODEL CONTENT

[0004] For the above prior art, the utility model provides a kind of benzene removal tower, mainly solves the technical problems existing in above background technology.

[0005] To achieve the above purpose, the technical scheme of the utility model embodiment is as follows:

[0006] A kind of benzene removal tower, including benzene removal tower main body, the top of the benzene removal tower main body is equipped with exhaust pipe, the lateral wall of the benzene removal tower main body is equipped with rich oil inlet pipe, the lower side of the rich oil inlet pipe is equipped with steam pipeline, the steam pipeline is divided into inner tube and outer tube, the outer tube is equipped with steam inlet, the bottom of the outer tube is communicated with gas-liquid separation device by elbow pipe, one end of the inner tube is communicated with gas-liquid separation device, the inner tube in the middle of the benzene removal tower main body is equipped with a plurality of spray pipes from top to bottom, and the rich oil inlet pipe and the spray pipe are equipped with tray.

[0007] Preferably, the top of the steam pipeline is fixedly connected with the lateral wall of the benzene removal tower main body by connecting rod.

[0008] Preferably, the upper side of the spray pipe is equipped with inclined eaves.

[0009] Preferably, the bottom of the benzene removal tower main body is equipped with liquid discharge port.

[0010] Preferably, the bottom of the benzene removal tower main body is equipped with liquid discharge port.

[0011] Preferably, the gas-liquid separation device comprises a cylinder, a baffle, an evaporation chamber and a drying chamber, the cylinder is divided into the drying chamber and the evaporation chamber from top to bottom, the baffle is located at the end of the elbow pipe and is installed on the inner wall of the evaporation chamber, a drain outlet is installed at the bottom of the evaporation chamber, the drying chamber is installed above the evaporation chamber and is internally provided with an air passage, the upper end of the cylinder is communicated with the inner pipe through an air outlet pipe, and an adjusting valve is arranged on the air outlet pipe.

[0012] Preferably, the drying chamber is internally filled with a stainless steel filter screen in a porous structure.

[0013] The utility model discloses the beneficial effect lies in: through the outer pipe of steam pipeline, the wet steam is introduced into the gas-liquid separation device, and the condensed water in the wet steam is separated, and the dryness of steam is improved, and the steam after drying is passed into the inner pipe, and the rich oil in the benzene stripping tower is evaporated through the heat transfer of the inner pipe, and the heat conversion efficiency is improved, and the wet steam of the outer pipe plays the role of heat preservation to the dry steam of the inner pipe. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view of a benzene stripping tower in the embodiment of the application;

[0015] EXPLANATION OF REFERENCE NUMBERS:

[0016] 1, benzene stripping tower main part;2, exhaust pipe;3, rich oil inlet pipe;4, inner pipe;5, outer pipe;6, steam inlet;7, elbow pipe;8, nozzle;9, tray;10, connecting rod;11, eave;12, liquid discharge port;13, cylinder;14, baffle;15, evaporation chamber;16, drying chamber;17, drain outlet;18, air passage;19, air outlet pipe;20, adjusting valve;21, stainless steel filter screen. DETAILED DESCRIPTION

[0017] The technical scheme of the utility model is further described in detail below in combination with the drawings and specific embodiments. Unless otherwise defined, all the technical and scientific terms used in the present application have the same meanings as understood by the person skilled in the art to which the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not intended to limit the utility model. In the following description, the expression "some embodiments" describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0018] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It is also possible in the prior art - before the meaning of a term is discussed in this specification - to use the term in a different way.

[0019] Embodiment 1

[0020] Please refer to the accompanying drawings Figure 1 The application provides a benzene removal tower, which comprises a benzene removal tower body 1, an exhaust pipe 2 arranged at the top of the benzene removal tower body 1, and a rich oil inlet pipe 3 arranged on the side wall of the benzene removal tower body 1. A steam pipeline is arranged below the rich oil inlet pipe 3, and the steam pipeline is divided into an inner pipe 4 and an outer pipe 5. A steam inlet 6 is arranged on the outer pipe 5, and the bottom of the outer pipe 5 is connected with a gas-liquid separation device through an elbow pipe 7. One end of the inner pipe 4 is connected with the gas-liquid separation device, and a plurality of spray pipes 8 are arranged on the inner pipe 4 from top to bottom and located in the benzene removal tower body 1. A tower tray 9 is arranged between the rich oil inlet pipe 3 and the spray pipes 8.

[0021] After the benzene removal tower starts to work, wet steam enters the outer pipe 5 of the steam pipeline through the steam inlet 6, and the wet steam in the outer pipe 5 moves transversely and flows into the gas-liquid separation device through the elbow pipe 7. The wet steam in the outer pipe 5 plays a role of heat preservation for the dry steam in the inner pipe 4. The gas-liquid separation device separates condensed water in the wet steam, thereby improving the dryness of the steam. The dry steam passes through the gas outlet pipe 19 and enters the inner pipe 4, and is sprayed out through the spray pipes 8 on the inner pipe 4, thereby improving the heat conversion efficiency. The rich oil flows into the tower tray 9 through the rich oil inlet pipe 3, and the rich oil on the tower tray 9 falls and reacts with the dry steam sprayed out by the spray pipes 8, so that the rich oil and the water vapor are fully contacted and heat transfered. Crude benzene steam and lean oil are obtained from the rich oil. The lean oil flows to the bottom of the tower by gravity, and the crude benzene steam rises to the exhaust pipe 2 at the top of the tower and is discharged. Crude benzene liquid is obtained through subsequent condensation and separation.

[0022] Specifically, the top of the steam pipeline is fixedly connected with the side wall of the benzene removal tower body 1 through a connecting rod 10. The steam pipeline is fixed through the connecting rod 10, thereby improving the stability of the steam pipeline.

[0023] Specifically, an inclined barge board 11 is arranged above each spray pipe 8. The inclined barge board 11 is adopted to avoid the influence of the flow of the rich oil into the steam pipeline on the spraying of the steam.

[0024] Specifically, the benzene removal tower body 1 is provided with a conical lower end. The conical lower end is adopted to facilitate the subsequent collection and separation of the obtained lean oil.

[0025] Specifically, the benzene stripping tower body 1 is provided with a liquid outlet 12 at the bottom. The obtained lean oil is discharged through the liquid outlet 12, which facilitates subsequent regeneration to continue to absorb benzene in the coke oven gas, improves the utilization rate of the washing oil, and reduces energy consumption.

[0026] Embodiment 2

[0027] Please refer to the accompanying drawings Figure 1 The difference between the embodiment and the embodiment 1 is that the gas-liquid separation device comprises a cylinder 13, a baffle 14, an evaporation chamber 15 and a drying chamber 16, the cylinder 13 is divided into the drying chamber 16 and the evaporation chamber 15 from top to bottom, the baffle 14 is located at the end of the elbow pipe 7 and is installed on the inner wall of the evaporation chamber 15, a water outlet 17 is installed at the bottom of the evaporation chamber 15, the drying chamber 16 is installed above the evaporation chamber 15 and is internally provided with an air duct 18, the upper end of the cylinder 13 is communicated with the inner pipe 4 through an air outlet pipe 19, and an adjusting valve 20 is arranged on the air outlet pipe 19.

[0028] The wet steam enters the evaporation chamber 15 through the elbow pipe 7, the cross section of the evaporation chamber 15 is suddenly increased, the steam is decelerated, the condensed water in the steam is separated out and discharged through the condensed water outlet at the bottom of the evaporation chamber 15 due to the inertia effect and the blockage of the baffle 14, the steam separated from the water is introduced into the preheated drying chamber 16 through the air duct 18, the water remaining in the steam is dried, the adjusting valve 20 is opened, the pressure in the drying chamber 16 is reduced, the vaporization temperature is reduced, the water remaining in the steam is heated and vaporized again, so that the drying treatment of the wet steam is completed, the steam-water separation of the wet steam is completed, and the dried steam enters the inner pipe 4 through the adjusting valve 20, thereby improving the heat conversion efficiency.

[0029] Specifically, the drying chamber 16 is internally filled with a stainless steel filter screen 21, and the stainless steel filter screen 21 has a porous structure. The drying chamber 16 is internally filled with the stainless steel filter screen 21, so that the water remaining in the steam is filtered and separated, preferably, the bottom of the drying chamber 16 is conical, so that the water is prevented from being retained.

[0030] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. The protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A dephenylation column characterized by, The application relates to a benzene removal tower, which comprises a benzene removal tower body, an exhaust pipe arranged at the top of the benzene removal tower body, a rich oil inlet pipe arranged on the side wall of the benzene removal tower body, a steam pipeline arranged below the rich oil inlet pipe, an inner pipe and an outer pipe formed by the steam pipeline, a steam inlet arranged on the outer pipe, a gas-liquid separation device communicated with the outer pipe through a bend pipe at the bottom of the outer pipe, one end of the inner pipe communicated with the gas-liquid separation device, a plurality of spray pipes arranged on the inner pipe from top to bottom and located in the middle of the benzene removal tower body, and a tower tray arranged between the rich oil inlet pipe and the spray pipes.

2. A dephenlling tower according to claim 1, characterized in that The top of the steam pipeline is fixedly connected with the side wall of the benzene removal tower body through a connecting rod.

3. A dephenlling tower according to claim 1, characterized in that An inclined baffle is arranged above each spray pipe.

4. A dephenlling tower according to claim 1, characterized in that The benzene removal tower body is provided with a conical lower end.

5. A dephenlling tower according to claim 1, wherein The bottom of the benzene removal tower body is provided with a liquid discharge port.

6. A dephenlling tower according to claim 1, characterized in that The gas-liquid separation device comprises a cylinder, a baffle, an evaporation chamber and a drying chamber, the cylinder is divided into the drying chamber and the evaporation chamber from top to bottom, the baffle is arranged at the end of the bend pipe and installed on the inner wall of the evaporation chamber, a water discharge port is installed at the bottom of the evaporation chamber, the drying chamber is installed above the evaporation chamber and internally provided with an air passage, the cylinder is communicated with the inner pipe through an air outlet pipe, and an adjusting valve is arranged on the air outlet pipe.

7. A dephenylation tower according to claim 6, wherein The inside of the drying chamber is filled with a stainless steel filter screen in a porous structure.

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