A carbon five hydrogenation device

Abstract

The utility model relates to petroleum chemical production device technical field discloses a kind of carbon five hydrogenation device, including hydrogenation reaction unit and the segmented rectification unit connected in the downstream of hydrogenation reaction unit;The segmented rectification unit includes the stable column, first rectification tower, second rectification tower and third rectification tower connected in proper order, the top of stable column is connected with first product tank, the top of first rectification tower is connected with second product tank, the top of second rectification tower is connected with third product tank, the top of third rectification tower is connected with fourth product tank, the bottom of third rectification tower is connected with first product buffer tank.The utility model has the following technical effects: by setting segmented rectification unit in the downstream of hydrogenation reaction unit, the hydrogenation of carbon five and fine separation are realized, more than four additional products can be finally obtained, the additional value of carbon five hydrogenation product is effectively improved, and device overall structure is simple, and operating cost is low.

Description

Technical Field

[0001] This utility model belongs to the technical field of petrochemical production equipment, specifically relating to a C5 hydrogenation device. Background Technology

[0002] In the petrochemical production process, ethylene cracking units, as core production equipment, produce byproducts including cracked C5 and cracked C9. Cracked C5 mainly comprises C5 alkanes, monoalkanes, dienes, and C4 components. Cracked C5 can be used directly as fuel or, after hydrotreating, as a blending component in gasoline. With the continuous development of the petrochemical industry, utilizing different components of cracked C5 to produce refined, diversified, and high-end chemical products, expanding product application areas, and achieving high-value-added comprehensive utilization of C5 resources is an important way to enhance the core competitiveness of the petrochemical industry.

[0003] Currently, to meet the demands of high-value production, cracked C5 typically undergoes initial separation and purification to obtain a mixed C5 containing refined C5, monoolefins, and non-polymerized C5. This mixed C5 is then hydrogenated in a hydrogenation unit to obtain hydrogenated C5 products. These hydrogenated C5 products can be further processed through recycling and distillation to yield other by-products. However, existing post-processing techniques for hydrogenated C5 products are cumbersome, resulting in complex overall production equipment structures, increased energy consumption and operating costs, and the variety of by-products obtained remains limited, failing to achieve the ideal goal of high-value production. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a C5 hydrogenation device. By setting up a segmented distillation unit downstream of the hydrogenation reaction unit, the hydrogenation and fine separation of C5 are achieved, ultimately yielding more than four additional products. This effectively increases the added value of the C5 hydrogenated products, and the device has a simple overall structure and low operating costs.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a C5 hydrogenation device, including a hydrogenation reaction unit and a segmented distillation unit connected downstream of the hydrogenation reaction unit; The segmented distillation unit includes a stabilizer column, a first distillation column, a second distillation column, and a third distillation column connected in sequence. The top of the stabilizer column is connected to a first product tank, the top of the first distillation column is connected to a second product tank, the top of the second distillation column is connected to a third product tank, the top of the third distillation column is connected to a fourth product tank, and the bottom of the third distillation column is connected to a first product buffer tank.

[0006] As a further description of the technical solution of this utility model, the first product tank is a C4 product tank, the second product tank is an isopentane product tank, the third product tank is a n-pentane product tank, and the fourth product tank is a cyclopentane product tank.

[0007] As a further description of the technical solution of this utility model, the first product buffer container is a C6 product buffer container.

[0008] As a further description of the technical solution of this utility model, the bottom of the stabilizing column is connected to a first connecting pipe, which is connected to the first distillation column; the bottom of the first distillation column is connected to a second connecting pipe, which is connected to the second distillation column; and the bottom of the second distillation column is connected to a third connecting pipe, which is connected to the third distillation column.

[0009] As a further description of the technical solution of this utility model, the lower ends of the stabilizing column, the first distillation column, the second distillation column and the third distillation column are all provided with steam input ports.

[0010] As a further description of the technical solution of this utility model, the hydrogenation reaction unit includes a first-stage hydrogenation reactor and a second-stage hydrogenation reactor connected in sequence, and the second-stage hydrogenation reactor is connected to the stabilizer tower.

[0011] As a further description of the technical solution of this utility model, the hydrogenation reaction unit also includes a second product buffer tank. The output end of the first-stage hydrogenation reactor is connected to a first output pipe and a second output pipe. The first output pipe is connected to the second product buffer tank, and the second output pipe is connected to the second-stage hydrogenation reactor. The output end of the second-stage hydrogenation reactor is connected to a third output pipe and a fourth output pipe. The third output pipe is connected to the second product buffer tank, and the fourth output pipe is connected to the stabilizer tower.

[0012] As a further description of the technical solution of this utility model, the hydrogenation reaction unit also includes a raw material storage tank, a first hydrogen storage tank, and a second hydrogen storage tank. The raw material storage tank and the first hydrogen storage tank are both connected to the input end of the first-stage hydrogenation reactor, and the second hydrogen storage tank is connected to the input end of the second-stage hydrogenation reactor.

[0013] As a further description of the technical solution of this utility model, the hydrogenation reaction unit also includes a circulating hydrogen buffer tank, which is connected to the input end of the first-stage hydrogenation reactor.

[0014] As a further description of the technical solution of this utility model, the output ends of both the second hydrogen storage tank and the circulating hydrogen buffer tank are equipped with compressors.

[0015] In summary, this utility model has at least the following advantages: The C5 hydrogenation apparatus provided by this invention, by sequentially connecting a stabilizing column, a first distillation column, a second distillation column, and a third distillation column downstream of the hydrogenation reaction unit, can perform segmented distillation separation of hydrogenated C5 products, ultimately obtaining more than four by-products. This effectively increases the added value of hydrogenated C5 products, achieving efficient and high-value production. Furthermore, the production capacity of each product can be flexibly adjusted, making it more adaptable to changes in market demand. This C5 hydrogenation apparatus achieves both hydrogenation and fine separation of C5, broadening the market channels for hydrogenated C5 products, significantly enhancing their market competitiveness. Moreover, the overall structure of the apparatus is simple, reducing energy consumption and operating costs, thus improving production profits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the C5 hydrogenation device according to Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the C5 hydrogenation device according to Embodiment 2 of this utility model; Figure 3 This is a schematic diagram of the C5 hydrogenation device according to Embodiment 3 of this utility model.

[0017] Marked in the image: 1. Hydrogenation reaction unit; 11. Primary hydrogenation reactor; 12. Secondary hydrogenation reactor; 13. Second product buffer tank; 14. Raw material storage tank; 15. Primary hydrogen storage tank; 16. Second hydrogen storage tank; 17. Circulating hydrogen buffer tank; 18. Compressor; 2. Segmented distillation unit; 21. Stabilizer column; 22. First distillation column; 23. Second distillation column; 24. Third distillation column; 25. First product tank; 26. Second product tank; 27. Third product tank; 28. Fourth product tank; 29. ​​First product buffer tank; 3. Steam inlet port; A. First connecting pipe; B. Second connecting pipe; C. Third connecting pipe; D. First output pipe; E. Second output pipe; F. Third output pipe; G. Fourth output pipe. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Example 1 refer to Figure 1 The C5 hydrogenation apparatus provided in this embodiment includes a hydrogenation reaction unit 1 and a segmented distillation unit 2 connected downstream of the hydrogenation reaction unit 1. The segmented distillation unit 2 includes a stabilizing column 21, a first distillation column 22, a second distillation column 23, and a third distillation column 24 connected in sequence. A first product tank 25 is connected to the top of the stabilizing column 21; a second product tank 26 is connected to the top of the first distillation column 22; a third product tank 27 is connected to the top of the second distillation column 23; a fourth product tank 28 is connected to the top of the third distillation column 24; and a first product buffer tank 29 is connected to the bottom of the third distillation column 24. The first product tank 25, the second product tank 26, the third product tank 27, and the fourth product tank 28 can be used to store the final product, while the first product buffer tank 29 can be used to store either the final product or intermediate products.

[0021] In one implementation, the first product tank 25 is a C4 product tank, the second product tank 26 is an isopentane product tank, the third product tank 27 is a n-pentane product tank, the fourth product tank 28 is a cyclopentane product tank, and the first product buffer tank 29 is a C6 product buffer tank. The C6 product stored in the first product buffer tank 29 can be used directly as a final product or as an intermediate product for the production of other products.

[0022] It is understood that in this embodiment, a mixed C5 mixture containing refined C5, monoolefins, and non-polymerized C5 is used as the raw material for the hydrogenation reaction. After hydrogenation reaction in hydrogenation reaction unit 1, hydrogenated C5 product is obtained. Subsequently, the hydrogenated C5 product undergoes segmented distillation through stabilization column 21, first distillation column 22, second distillation column 23, and third distillation column 24 to obtain C4 product, isopentane product, n-pentane product, cyclopentane product, and C6 product, forming a multi-category product matrix. This effectively increases the added value of the C5 hydrogenated product, enabling efficient and high-value production. Furthermore, the production capacity of each product can be flexibly adjusted, making it more adaptable to changes in market demand and significantly improving the market competitiveness of the product. At the same time, the overall structure of the C5 hydrogenation unit is simple, with low energy consumption and low operating costs, which is more conducive to improving production revenue.

[0023] In some embodiments, the bottom of the stabilizing column 21 is connected to a first connecting pipe A, which is connected to the first distillation column 22. The first connecting pipe A is used to transport the heavy components at the bottom of the stabilizing column 21 into the first distillation column 22. The bottom of the first distillation column 22 is connected to a second connecting pipe B, which is connected to the second distillation column 23. The second connecting pipe B is used to transport the heavy components at the bottom of the first distillation column 22 into the second distillation column 23. The bottom of the second distillation column 23 is connected to a third connecting pipe C, which is connected to the third distillation column 24. The third connecting pipe C is used to transport the heavy components at the bottom of the second distillation column 23 into the third distillation column 24.

[0024] In some embodiments, the lower ends of the stabilizing column 21, the first distillation column 22, the second distillation column 23, and the third distillation column 24 are all provided with steam inlet ports 3. Taking the first distillation column 22 as an example, steam enters the first distillation column 22 through the steam inlet port 3 at the lower end of the first distillation column 22, while the material to be distilled and separated enters the first distillation column 22 from the middle. The material flows from top to bottom, while the steam diffuses from bottom to top, thereby allowing the material and steam to fully contact each other, thus improving the distillation and separation efficiency.

[0025] Example 2 As a further optimization of Example 1, in Figure 1 Based on, refer to Figure 2 The hydrogenation reaction unit 1 includes a first-stage hydrogenation reactor 11 and a second-stage hydrogenation reactor 12 connected in sequence. The second-stage hydrogenation reactor 12 is connected to the stabilizer tower 21. In this embodiment, the temperature of the first-stage hydrogenation reactor 11 is set to 110°C and the pressure is set to 2.9 MPa. After the unsaturated hydrocarbons in the mixed C5 are hydrogenated in the first-stage hydrogenation reactor 11, saturated alkanes can be generated. The temperature of the second-stage hydrogenation reactor 12 is set to 290°C and the pressure is set to 2.8 MPa. After the hydrogenation product from the first stage is further hydrogenated in the second-stage hydrogenation reactor 12, the conversion rate of unsaturated hydrocarbons can reach more than 99%.

[0026] In some embodiments, the hydrogenation reaction unit 1 further includes a second product buffer tank 13, which stores the hydrogenated C5 product. The hydrogenated C5 product stored in the second product buffer tank 13 can be used directly as a final product or used as an intermediate product in other production processes. The output end of the first-stage hydrogenation reactor 11 is connected to a first output pipe D and a second output pipe E. The first output pipe D is connected to the second product buffer tank 13, and the second output pipe E is connected to the second-stage hydrogenation reactor 12. That is, the first-stage hydrogenation product output from the first-stage hydrogenation reactor 11 is divided into two streams, one of which is sent to the second product buffer tank 13, and the other is sent to the second-stage hydrogenation reactor 12 for further reaction. The output end of the second-stage hydrogenation reactor 12 is connected to a third output pipe F and a fourth output pipe G. The third output pipe F is connected to the second product buffer tank 13, and the fourth output pipe G is connected to the stabilizer tower 21. That is, the second-stage hydrogenation product output from the second-stage hydrogenation reactor 12 is divided into two streams, one of which is sent to the second product buffer tank 13, and the other is sent to the stabilizer tower 21 for further separation.

[0027] The hydrogenation reaction unit 1 also includes a raw material storage tank 14, a first hydrogen storage tank 15, and a second hydrogen storage tank 16. Both the raw material storage tank 14 and the first hydrogen storage tank 15 are connected to the input end of the first-stage hydrogenation reactor 11, and the second hydrogen storage tank 16 is connected to the input end of the second-stage hydrogenation reactor 12. The raw material storage tank 14 is used to store a mixed C5 raw material containing refined C5, monoolefins, and non-polycarbonate C5. The first hydrogen storage tank 15 is used to store fresh hydrogen, and the purity of the hydrogen stored in the first hydrogen storage tank 15 is ≥90%. The second hydrogen storage tank 16 can be used to store fresh hydrogen, or it can be used to store hydrogen recycled from the first-stage hydrogenation reaction and / or hydrogen recycled from the second-stage hydrogenation reaction. The purity of the hydrogen stored in the second hydrogen storage tank 16 is ≥80%.

[0028] In some embodiments, a pretreatment tank can be installed between the raw material storage tank 14 and the first-stage hydrogenation reactor 11 to remove oil impurities and free water from the mixed C5 raw materials, thereby improving the efficiency and quality of the subsequent hydrogenation reaction.

[0029] Example 3 As a further optimization of Example 2, in Figures 1 to 2 Based on, refer to Figure 3The hydrogenation reaction unit 1 also includes a circulating hydrogen buffer tank 17, which stores circulating hydrogen from the first stage of the hydrogenation reaction. The purity of the circulating hydrogen from the first stage of the hydrogenation reaction is ≥90%. The circulating hydrogen buffer tank 17 is connected to the input end of the first stage hydrogenation reactor 11, and can provide the hydrogen required for the reaction to the first stage hydrogenation reactor 11. Since the amount of hydrogen required for the first stage hydrogenation reaction process is relatively large, supplying hydrogen to the first stage hydrogenation reactor 11 simultaneously through the first hydrogen storage tank 15 and the circulating hydrogen buffer tank 17 can reduce the amount of fresh hydrogen used, improve the utilization rate of circulating hydrogen, thereby improving the utilization rate of production resources and further reducing production costs.

[0030] In some embodiments, the output ends of both the second hydrogen storage tank 16 and the circulating hydrogen buffer tank 17 are equipped with compressors 18, which can provide sufficient power for the supply of hydrogen.

[0031] In some embodiments, heat exchangers are provided at the output ends of both the first-stage hydrogenation reactor 11 and the second-stage hydrogenation reactor 12, which can be used to cool the first-stage hydrogenation products and the second-stage hydrogenation products. The cold source of the heat exchangers can come from circulating water from other production processes, etc., to improve energy utilization efficiency and reduce production energy consumption.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In the description of this utility model, 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 utility model is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. 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.

[0034] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A C5 hydrogenation device, characterized in that, It includes a hydrogenation reaction unit (1) and a segmented distillation unit (2) connected downstream of the hydrogenation reaction unit (1). The segmented distillation unit (2) includes a stabilizer column (21), a first distillation column (22), a second distillation column (23), and a third distillation column (24) connected in sequence. The top of the stabilizer column (21) is connected to a first product tank (25), the top of the first distillation column (22) is connected to a second product tank (26), the top of the second distillation column (23) is connected to a third product tank (27), the top of the third distillation column (24) is connected to a fourth product tank (28), and the bottom of the third distillation column (24) is connected to a first product buffer tank (29).

2. The C5 hydrogenation apparatus according to claim 1, characterized in that, The first product tank (25) is a C4 product tank, the second product tank (26) is an isopentane product tank, the third product tank (27) is a n-pentane product tank, and the fourth product tank (28) is a cyclopentane product tank.

3. The C5 hydrogenation apparatus according to claim 2, characterized in that, The first product buffer container (29) is a C6 product buffer container.

4. The C5 hydrogenation apparatus according to claim 1, characterized in that, The bottom of the stabilizer column (21) is connected to a first connecting pipe (A), which is connected to the first distillation column (22). The bottom of the first distillation column (22) is connected to a second connecting pipe (B), which is connected to the second distillation column (23). The bottom of the second distillation column (23) is connected to a third connecting pipe (C), which is connected to the third distillation column (24).

5. The C5 hydrogenation apparatus according to claim 1, characterized in that, The lower ends of the stabilizer (21), the first distillation column (22), the second distillation column (23) and the third distillation column (24) are all provided with steam input ports (3).

6. The C5 hydrogenation apparatus according to claim 1, characterized in that, The hydrogenation reaction unit (1) includes a first-stage hydrogenation reactor (11) and a second-stage hydrogenation reactor (12) connected in sequence, and the second-stage hydrogenation reactor (12) is connected to the stabilizer tower (21).

7. The C5 hydrogenation apparatus according to claim 6, characterized in that, The hydrogenation reaction unit (1) further includes a second product buffer tank (13). The output end of the first-stage hydrogenation reactor (11) is connected to a first output pipe (D) and a second output pipe (E). The first output pipe (D) is connected to the second product buffer tank (13), and the second output pipe (E) is connected to the second-stage hydrogenation reactor (12). The output end of the second-stage hydrogenation reactor (12) is connected to a third output pipe (F) and a fourth output pipe (G). The third output pipe (F) is connected to the second product buffer tank (13), and the fourth output pipe (G) is connected to the stabilizer tower (21).

8. The C5 hydrogenation apparatus according to claim 6, characterized in that, The hydrogenation reaction unit (1) further includes a raw material storage tank (14), a first hydrogen storage tank (15), and a second hydrogen storage tank (16). The raw material storage tank (14) and the first hydrogen storage tank (15) are both connected to the input end of the first-stage hydrogenation reactor (11), and the second hydrogen storage tank (16) is connected to the input end of the second-stage hydrogenation reactor (12).

9. The C5 hydrogenation apparatus according to claim 8, characterized in that, The hydrogenation reaction unit (1) also includes a circulating hydrogen buffer tank (17), which is connected to the input end of the first-stage hydrogenation reactor (11).

10. The C5 hydrogenation apparatus according to claim 9, characterized in that, Both the second hydrogen storage tank (16) and the circulating hydrogen buffer tank (17) are equipped with compressors (18) at their output ends.

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