Device for removing organic sulfur in liquefied petroleum gas

Abstract

The utility model relates to the technical field of liquefied petroleum gas treatment, in particular to a device for removing organic sulfur in liquefied petroleum gas. Comprising an outer cylinder, the upper end and the lower end of the outer cylinder are detachably and fixedly connected with inner cylinders in a sealed mode, the opposite ends of the two inner cylinders are fixedly connected through a filter cylinder, the filter cylinder is located in the outer cylinder, a plurality of annular pipes are evenly distributed and fixed in an annular cavity between the filter cylinder and the outer cylinder, a plurality of outlet holes are formed in the annular pipes, and a gathering pipe is arranged on the outer side of the outer cylinder and communicated with the annular pipes. A plurality of heating rods are uniformly distributed and fixed on the inner circumference of the cylinder wall of the filter cylinder, outer fins are fixed on the outer sides of the heating rods, the outer fins extend into an annular cavity between the outer cylinder and the filter cylinder, inner fins are fixed on the inner sides of the heating rods, the inner fins extend into the filter cylinder, an inner pipe is arranged in the filter cylinder, the lower end of the inner pipe is blocked, and the upper end of the inner pipe extends to the outer side of the upper inner cylinder; and a plurality of holes are formed in the inner pipe part on the inner side of the filter cartridge. The device is short in gas path and suitable for desulfurizing liquefied petroleum gas with low organic sulfur content.

Description

TECHNICAL FIELD

[0001] The utility model relates to a liquefied petroleum gas processing technical field, concretely relates to a device for removing organic sulfur in liquefied petroleum gas. BACKGROUND

[0002] With the continuous increase of high-sulfur crude oil processing capacity in China, the gas components produced in the oil refining process, especially various sulfur compounds in liquefied petroleum gas, are also increasing. In addition to hydrogen sulfide, there are also organic sulfur such as mercaptan, sulfide, carbonyl sulfur and disulfide. The presence of these sulfur compounds will cause corrosion to the equipment during the subsequent processing of liquefied petroleum gas, and will cause catalyst poisoning; when liquefied petroleum gas is used as fuel, sulfur oxides will be produced, forming acid rain and polluting the environment. Therefore, desulfurization of liquefied petroleum gas has both economic benefits and environmental protection significance.

[0003] The patent document with the authorized publication number CN108070416B discloses a liquefied petroleum gas adsorption desulfurization process, which uses a fixed bed reactor. At least two fixed bed reactors are provided. First, the liquefied petroleum gas is sent into the fixed bed reactor filled with adsorbent for adsorption desulfurization reaction. When the adsorbent reaches the adsorption saturation state, the liquefied petroleum gas is switched to another fixed bed reactor filled with adsorbent for continuous adsorption desulfurization reaction, and hydrogen is introduced into the fixed bed reactor that has reached adsorption saturation for regeneration. The fixed bed reactors are all filled with adsorbent, and the adsorbent includes adsorbent A and adsorbent B. The volume ratio of adsorbent A to adsorbent B is 0.1-10. Two kinds of adsorbents are needed during the liquefied petroleum gas adsorption desulfurization process. Most of the existing fixed bed reactors have only one chamber for containing adsorbent. If the two kinds of adsorbents are mixed in one chamber, it is inconvenient to classify and recover the two kinds of adsorbents.

[0004] The patent document with the publication number CN203469967U discloses an adiabatic composite fixed bed reactor for deoxidation of oxygen-containing coal bed gas. The inner cylinder and the secondary reaction chamber are independently provided and can place two different adsorbents, facilitating classification and recovery of different adsorbents. However, the gas path of the fixed bed reactor is long, and it is not suitable for desulfurization of liquefied petroleum gas with low organic sulfur content. When regenerating the adsorbent, the hydrogen flow path is long, which is not convenient for rapid regeneration of the adsorbent. Furthermore, the existing part of the fixed bed reactor cannot uniformly heat the adsorbent, and the desulfurization efficiency is low. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problem of a device for removing organic sulfur in liquefied petroleum gas, which has a short gas path, is convenient for desulfurization of liquefied petroleum gas with low organic sulfur content, can uniformly heat the adsorbent, and has a fast desulfurization agent regeneration speed.

[0006] To achieve the above object, the technical scheme provided by the utility model is:

[0007] A device for removing organic sulfur in liquefied petroleum gas, comprising an outer cylinder, the upper and lower ends of the outer cylinder are detachably and fixedly connected with inner cylinders, the opposite ends of the two inner cylinders are fixedly connected through filter cylinders, the filter cylinders are located in the outer cylinder, a plurality of ring pipes are fixedly arranged in the annular cavity between the filter cylinder and the outer cylinder along the axial direction of the outer cylinder, a plurality of outlet holes are formed in the ring pipes, a collecting pipe is arranged outside the outer cylinder, the collecting pipe is communicated with the ring pipes, a plurality of heating rods are fixedly arranged on the inner circumferences of the cylinder walls of the filter cylinders, outer fins are fixedly arranged outside the heating rods, the outer fins extend into the annular cavity between the outer cylinder and the filter cylinder, inner fins are fixedly arranged inside the heating rods, the inner fins extend into the filter cylinders, an inner pipe is arranged in the filter cylinder, the lower end of the inner pipe is blocked, the upper end of the inner pipe extends outside the upper inner cylinder, the inner pipe is detachably and fixedly connected with the upper inner cylinder in a sealed manner, a plurality of openings are formed in the inner pipe part on the inner side of the filter cylinder.

[0008] Specifically, the upper end of the ring pipe is fixedly connected with a ring plate, the outer edge of the ring plate is fixedly connected with the inner wall of the outer cylinder, and the upper end of the ring plate is inclined downward towards the center thereof.

[0009] Specifically, the upper and lower ends of the outer cylinder are detachably and fixedly connected with first cover plates, the inner cylinder penetrates through the first cover plate on one side thereof, and the inner cylinder is detachably and fixedly connected with the first cover plate on one side thereof in a sealed manner.

[0010] Specifically, the opposite sides of the two inner cylinders are detachably and fixedly connected with second cover plates, the lower end of the inner pipe is in sealed contact with the second cover plate below, the upper end of the inner pipe penetrates through the second cover plate above, and the inner pipe is detachably and fixedly connected with the second cover plate above in a sealed manner.

[0011] Specifically, the collecting pipe is communicated with the ring pipes through a communicating pipe.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] 1. The liquefied petroleum gas enters the annular cavity between the filter cylinder and the outer cylinder through the collecting pipe, the communicating pipe, the ring pipe and the outlet hole, the liquefied petroleum gas between the filter cylinder and the outer cylinder is in contact with the adsorbent between the filter cylinder and the outer cylinder, and then enters the filter cylinder, the liquefied petroleum gas in the filter cylinder is in contact with the adsorbent in the filter cylinder, and then enters the inner pipe through the opening and is discharged, the device has a short gas path, and is suitable for desulfurization treatment of liquefied petroleum gas with low organic sulfur content.

[0014] 2. Since the device has a short gas path, when the adsorbent is regenerated, the hydrogen gas is discharged through the inner pipe, the opening, the filter cylinder, the outlet hole, the ring pipe, the communicating pipe and the collecting pipe, and the regeneration efficiency of the adsorbent can be improved.

[0015] 3. Multiple heating rods are fixed inside the filter cartridge, and outer and inner fins are fixed on the heating rods. The outer and inner fins can make the adsorbent between the filter cartridge and the outer cylinder and the adsorbent inside the filter cartridge heat up evenly, which can ensure the consistency of the adsorbent temperature and ensure the desulfurization effect of liquefied petroleum gas.

[0016] 4. Different adsorbents can be placed between the filter cartridge and the outer cartridge, as well as inside the filter cartridge, allowing for separate placement of different types of adsorbents and facilitating their later classification and recycling.

[0017] 5. The upper and lower ends of the outer cylinder are detachably fixed and sealed with a first cover plate. The opposite sides of the two inner cylinders are detachably fixed and sealed with a second cover plate. The upper end of the inner tube passes through the upper second cover plate and the inner tube and the upper second cover plate are detachably fixed and sealed. The first cover plate, the second cover plate and the inner tube can be disassembled to facilitate the replacement of the adsorbent.

[0018] 6. A ring plate is fixed at the upper end of the ring tube. The outer edge of the ring plate is fixedly connected to the inner wall of the outer cylinder. The upper end of the ring plate is inclined downward towards the center. When the adsorbent is discharged, it can prevent the adsorbent from remaining on the ring tube and can discharge all the adsorbent between the filter cartridge and the outer cylinder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention.

[0020] Figure 2 This is a cross-sectional view of the present invention.

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the fit between the ring pipe and the ring plate.

[0023] The components in the attached diagram are named as follows: 1. Outer cylinder, 2. Inner cylinder, 3. First cover plate, 4. Second cover plate, 5. Manifold, 6. Connecting pipe, 7. Ring pipe, 8. Filter cylinder, 9. Heating rod, 10. Outer fin, 11. Inner fin, 12. Inner tube, 13. Opening, 14. Outlet, 15. Ring plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1: Refer to Figures 1-4As shown, a device for removing organic sulfur from liquefied petroleum gas includes an outer cylinder 1, and the upper and lower ends of the outer cylinder 1 are detachably and fixedly connected with inner cylinders 2. The opposite ends of the two inner cylinders 2 are fixedly connected through filter cylinders 8, and the filter cylinders 8 are located in the outer cylinder 1. Specifically, the upper and lower ends of the outer cylinder 1 are detachably and fixedly connected with first cover plates 3, and the inner cylinder 2 penetrates through the first cover plate 3 on one side thereof, and the inner cylinder 2 and the first cover plate 3 on one side thereof are detachably and fixedly connected.

[0026] A plurality of ring pipes 7 are fixedly arranged in the annular cavity between the filter cylinder 8 and the outer cylinder 1 along the axial direction of the outer cylinder 1, and a plurality of outlet holes 14 are formed in the ring pipes 7. A manifold 5 is arranged outside the outer cylinder 1, and the manifold 5 is in communication with the ring pipes 7. Specifically, the manifold 5 and the ring pipes 7 are in communication through communication pipes 6.

[0027] A plurality of heating rods 9 are fixedly arranged on the inner circumferences of the cylinder walls of the filter cylinders 8, and outer fins 10 are fixedly arranged on the outer sides of the heating rods 9, and the outer fins 10 extend into the annular cavity between the outer cylinder 1 and the filter cylinder 8. Inner fins 11 are fixedly arranged on the inner sides of the heating rods 9, and the inner fins 11 extend into the filter cylinder 8.

[0028] An inner pipe 12 is arranged in the filter cylinder 8, the lower end of the inner pipe 12 is blocked, the upper end of the inner pipe 12 extends to the outside of the upper inner cylinder 2, the inner pipe 12 and the upper inner cylinder 2 are detachably and fixedly connected, and a plurality of openings 13 are formed in the part of the inner pipe 12 on the inner side of the filter cylinder 8. Specifically, the opposite sides of the inner cylinder 2 are detachably and fixedly connected with second cover plates 4, the lower end of the inner pipe 12 is in sealing contact with the lower second cover plate 4, the upper end of the inner pipe 12 penetrates through the upper second cover plate 4, and the inner pipe 12 and the upper second cover plate 4 are detachably and fixedly connected.

[0029] The liquefied petroleum gas enters the annular cavity between the filter cylinder 8 and the outer cylinder 1 through the manifold 5, the communication pipes 6, the ring pipes 7 and the outlet holes 14, and after the liquefied petroleum gas in the annular cavity between the filter cylinder 8 and the outer cylinder 1 contacts and reacts with the adsorbent, the liquefied petroleum gas enters the filter cylinder 8, and after the liquefied petroleum gas in the filter cylinder 8 contacts and reacts with the adsorbent, the liquefied petroleum gas enters the inner pipe 12 through the openings 13 and is discharged. The device has a short gas path, is suitable for desulfurization treatment of liquefied petroleum gas with low organic sulfur content, and has the advantages that due to the short gas path of the device, when the adsorbent is regenerated, hydrogen gas is discharged through the inner pipe 12, the openings 13, the filter cylinder 8, the outlet holes 14, the ring pipes 7, the communication pipes 6 and the manifold 5, and the regeneration efficiency of the adsorbent can be improved.

[0030] During the process of removing organic sulfur from liquefied petroleum gas, the heating rods 9 are started, the heating rods 9 heat the adsorbent between the outer cylinder 1 and the filter cylinder 8 and the adsorbent in the filter cylinder 8 through the outer fins 10 and the inner fins 11 respectively, the outer fins 10 and the inner fins 11 can uniformly heat the adsorbent between the outer cylinder 1 and the filter cylinder 8 and the adsorbent in the filter cylinder 8, can ensure the consistency of the temperature of the adsorbent, and ensure the desulfurization effect on the liquefied petroleum gas.

[0031] Different adsorbents can be placed between the filter cartridge 8 and the outer cylinder 1, as well as inside the filter cartridge 8. This allows for the separate placement of different types of adsorbents, facilitating their later classification and recycling.

[0032] This device allows for easy disassembly of the first cover plate 3, the second cover plate 4, and the inner tube 12, facilitating the replacement of the adsorbent. It also facilitates the removal of the filter cartridge 8, making it easier to unclog and replace the heating rod 9.

[0033] Example 2: Based on Example 1, referring to... Figure 4 As shown, an annular plate 15 is fixed to the upper end of the annular tube 7. The outer edge of the annular plate 15 is fixedly connected to the inner wall of the outer cylinder 1, and the upper end of the annular plate 15 is inclined downward towards its center. When the adsorbent is discharged, under the guiding action of the upper end of the annular plate 15, the adsorbent can be prevented from remaining on the annular tube 7, and all the adsorbent between the filter cartridge 8 and the outer cylinder 1 can be discharged.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for removing organic sulfur from liquefied petroleum gas, comprising an outer cylinder (1), the upper and lower ends of the outer cylinder (1) are detachably and fixedly connected with an inner cylinder (2), characterized in that, The opposite ends of the two inner cylinders (2) are fixedly connected through a filter cylinder (8), the filter cylinder (8) is located in the outer cylinder (1), a plurality of ring pipes (7) are uniformly fixed in the annular cavity between the filter cylinder (8) and the outer cylinder (1) and along the axial direction of the outer cylinder (1), a plurality of outlet holes (14) are formed in the ring pipes (7), a collecting pipe (5) is arranged outside the outer cylinder (1), the collecting pipe (5) is in communication with the ring pipes (7), a plurality of heating rods (9) are uniformly fixed on the inner circumferences of the cylinder walls of the filter cylinder (8), outer fins (10) are fixed outside the heating rods (9), the outer fins (10) extend into the annular cavity between the outer cylinder (1) and the filter cylinder (8), inner fins (11) are fixed inside the heating rods (9), the inner fins (11) extend into the filter cylinder (8), an inner pipe (12) is arranged in the filter cylinder (8), the lower end of the inner pipe (12) is blocked, the upper end of the inner pipe (12) extends outside the upper inner cylinder (2), the inner pipe (12) is detachably and fixedly and sealingly connected with the upper inner cylinder (2), a plurality of openings (13) are formed in the part of the inner pipe (12) on the inner side of the filter cylinder (8).

2. The device for removing organic sulfur from liquefied petroleum gas according to claim 1, wherein The upper end of the ring pipe (7) is fixedly connected with a ring plate (15), the outer edge of the ring plate (15) is fixedly connected with the inner wall of the outer cylinder (1), and the upper end of the ring plate (15) is inclined downward towards the center of the ring plate (15).

3. The device for removing organic sulfur from liquefied petroleum gas according to claim 1, characterized by, The upper and lower ends of the outer cylinder (1) are detachably and fixedly and sealingly connected with first cover plates (3), the inner cylinder (2) penetrates through the first cover plate (3) on one side thereof, and the inner cylinder (2) is detachably and fixedly and sealingly connected with the first cover plate (3) on one side thereof.

4. The apparatus for removing organic sulfur from liquefied petroleum gas according to claim 1, wherein The opposite sides of the two inner cylinders (2) are detachably and fixedly and sealingly connected with second cover plates (4), the lower end of the inner pipe (12) is in sealing contact with the lower second cover plate (4), the upper end of the inner pipe (12) penetrates through the upper second cover plate (4), and the inner pipe (12) is detachably and fixedly and sealingly connected with the upper second cover plate (4).

5. The apparatus for removing organic sulfur from liquefied petroleum gas according to claim 1, wherein The collecting pipe (5) and the ring pipe (7) are in communication through a communication pipe (6).

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