A fischer-tropsch synthesis hydrocarbon reactor

Abstract

The application discloses a Fischer-Tropsch synthesis aviation kerosene fraction oil reactor, and relates to the technical field of heat exchange reaction structures.The heat-conducting curved pipes reciprocate and bend in the cylinder shell, and the heat exchange area of the heat-conducting curved pipes is larger than that of the straight rod type heat-conducting pipes, and the heat exchange efficiency is higher; and through the driving of the driving motor, the transmission of the eccentric wheel and the oval frame makes the adjacent heat-conducting curved pipes staggered and swing forward and backward, the agitation of the liquid by the curved heat-conducting curved pipes is more violent, the flowing heat exchange liquid in the cylinder shell is disturbed in real time during the heat exchange process, and the heat exchange efficiency of the liquid and the heat-conducting curved pipes is improved.

Description

Technical Field

[0001] This invention belongs to the field of heat exchange reaction structure technology, specifically relating to a Fischer-Tropsch synthesis jet fuel distillate reactor. Background Technology

[0002] The Fischer-Tropsch synthesis reaction is a process that uses hydrogen and carbon monoxide as feedstocks and, under the catalysis of a catalyst, produces a liquid fuel as the primary component. Currently, the common process for hydrotreating Fischer-Tropsch synthetic oil involves mixing the synthetic oil with hydrogen and then feeding it into a hydrorefining reactor. There, olefin saturation and hydrogen deoxygenation of acidic and oxygen-containing compounds occur on a catalyst bed before the oil enters a fractionation system. In the fractionation tower, the hydrorefining products are separated into naphtha, diesel, and heavy oil. The heavy oil continues into a subsequent hydrocracking reactor, and the cracking products enter a second fractionation system. The tail oil is partially or completely recycled back to the hydrocracking reactor, the purpose of which is to obtain more naphtha and diesel fractions through cracking. These processes all use the traditional fixed-bed hydrorefining reactor model, primarily aimed at producing diesel blending components, with a small amount of naphtha as a byproduct. It is rarely used for producing aviation kerosene. Heat exchangers are devices used to reuse the heat from industrial waste liquids. They transfer the heat from the industrial waste liquid to the heat exchange liquid, and then utilize the heat from the liquid.

[0003] Since modernization, the demand for diesel and gasoline has declined significantly, while the demand for aviation kerosene has maintained a relatively high growth rate. Furthermore, with the continuous expansion of domestic imports of low-carbon olefins and aromatics, the production of high-quality chemical feedstocks is of great importance to the overall efficiency of refineries.

[0004] Conventional oil-water separation heat exchange reactors consist of a cylindrical shell with multiple thin tubes inside. Liquid flows through these tubes, while the liquid to be exchanged flows through the shell. By contacting the thin tubes with the liquid to be exchanged, the heat from the industrial waste liquid is transferred to the liquid being exchanged. In existing technologies, the liquid to be exchanged flows unidirectionally through the thin tubes, and heat exchange only occurs at the contact surface between the tubes and the liquid. Increasing the agitation of the water flow and the contact area of ​​the thin tubes can further increase the heat exchange efficiency, thereby improving the utilization rate of heat from the industrial waste liquid. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a Fischer-Tropsch synthesis jet fuel oil reactor that can increase the agitation of water flow and the contact area of ​​the thin tube, thereby improving the heat exchange rate.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention includes a cylindrical shell, the interior of which is hollow. A first interface and a second interface are respectively provided at both ends of the cylindrical shell. A heat-conducting pipe assembly is provided inside the cylindrical shell. The heat-conducting pipe assembly includes several base frames arranged laterally and covering the inner cross-section of the cylindrical shell. The base frames are located at the second interface end of the cylindrical shell. A heat-conducting pipe is provided on the base frame. The heat-conducting pipe extends from the lower end of the base frame, extends towards the first interface end of the cylindrical shell and bends back and forth, extends to the first interface port and bends back and forth, and finally extends from the upper end of the base frame. The heat-conducting pipe assembly also includes a heat medium inlet pipe and a heat medium outlet pipe, which are respectively connected to the two ends of the heat-conducting pipe. A support rod is fixed to the base frame. The support rod has an elliptical frame and a drive rod. The drive rod has several eccentric wheels with different eccentric angles relative to the drive rod but the same eccentric radius. The eccentric wheels are respectively supported within the elliptical frame. A drive motor is provided on the outside of the cylindrical shell, and the drive motor drives the drive rod to rotate.

[0008] Furthermore, the inner side of the first interface end of the cylindrical shell is divided into several through slots by several baffles. A support column is fixed on the bottom frame. The support column extends along the cylindrical shell and is fixed with a piston head. The piston head corresponds to the shape of the through slot. The piston head extends into and moves out of the through slot as the bottom frame moves back and forth.

[0009] Furthermore, the heat-conducting pipe is a heat-conducting curved pipe, and several interfering iron plates are provided on the side of the pipe wall. As the heat-conducting curved pipe swings, the interfering iron plates move the water flow.

[0010] Furthermore, the shell wall of the cylinder is provided with several hollow chambers, and the two ends of the hollow chambers are respectively connected to the heat medium outlet pipe and the heat medium inlet pipe.

[0011] Furthermore, the heat medium inlet pipe and the heat medium outlet pipe extend from the outside of the shell into the inside and extend to the second interface end. The heat medium outlet pipe and the heat medium inlet pipe are respectively connected to a centralized arc pipe. The centralized arc pipe is provided with several pipe openings. The ends of several heat-conducting curved pipes located at the upper and lower ends of the bottom frame are respectively connected to the pipe openings of the two centralized arc pipes through flexible hoses.

[0012] Furthermore, the heat pipe can also be a straight heat pipe, with several fins vertically distributed on its surface.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. In this invention, the heat-conducting curved tubes reciprocate within the shell, resulting in a larger heat exchange area and higher heat exchange efficiency. Furthermore, driven by the drive motor and the transmission between the eccentric wheel and the elliptical frame, several adjacent heat-conducting curved tubes oscillate back and forth, causing more intense agitation of the liquid. During the heat exchange process, the flowing liquid with heat exchange capacity within the shell is disturbed in real time, thereby improving the heat exchange efficiency between the liquid and the heat-conducting curved tubes.

[0015] 2. In this invention, the longitudinal fins inside the shell can enhance the heat transfer efficiency of the fluid inside the shell, increase the convective heat transfer coefficient on the shell side, ensure that the Reynolds number of the fluid on the shell side reaches a turbulent state, and effectively increase the heat exchange area during the reaction process.

[0016] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0018] Figure 1 This is a schematic diagram of the heat exchanger in Embodiment 1 of the present invention;

[0019] Figure 2 This is a cross-sectional view of the heat exchanger in Embodiment 1 of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure at the bottom frame of Embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure at the through groove in Embodiment 1 of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure at the heat-conducting curved tube in Embodiment 1 of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure at the concentrated arc-shaped tube in Embodiment 1 of the present invention;

[0024] Figure 7 This is a schematic diagram of the heat exchange straight tube in Embodiment 2 of the present invention;

[0025] Figure 8 This is a schematic diagram of the overall mechanism of the present invention.

[0026] The following are the markings in the attached diagram: 1. Shell; 11. First interface; 12. Second interface; 13. Through groove; 14. Hollow chamber; 2. Heat-conducting pipe assembly; 21. Bottom frame; 22. Heat-conducting pipe; 221. Heat-conducting curved pipe; 222. Interference iron plate; 223. Heat-conducting straight pipe; 224. Fin; 23. Heat medium inlet pipe; 24. Heat medium outlet pipe; 25. Support rod; 26. Elliptical frame; 27. Support column; 28. Piston head; 29. ​​Centralized arc pipe; 291. Pipe opening; 292. Flexible hose; 31. Drive rod; 32. Eccentric wheel; 33. Drive motor; 34. Support plate; 35. Raw material gas inlet manifold; 36. Reaction product outlet pipe; 37. Boiler feed water manifold; 38. Boiler drain manifold; 39. Bend; 40. Flange. Detailed Implementation

[0027] like Figures 1-6 As shown, this invention discloses a Fischer-Tropsch synthesis jet fuel distillate reactor.

[0028] Example 1:

[0029] A Fischer-Tropsch synthesis jet fuel oil reactor includes two vertically symmetrical support plates 34, with a plurality of heat-conducting pipes 22 disposed between the two support plates 34 (in this embodiment, there are 20 heat-conducting pipes 22, arranged in 4 layers, with 5 pipes evenly distributed in each layer). The two ends of the shell 1 are respectively provided with a first interface 11 and a second interface 12 perpendicular to the shell 1 and facing opposite directions. Adjacent heat-conducting pipes 22 are placed in opposite directions. The surface of the heat-conducting pipes 22 is also provided with a hollow shell 1.

[0030] Each heat pipe 22 is connected end-to-end via a bend 39. The bend 39 and the heat pipe 22 are connected via a flange 40. Adjacent shells 1 are connected via a second interface 12. The first interface 11 of one side of the heat pipe 22 is connected via a boiler feedwater manifold 37; the second interface 12 of the other side of the heat pipe 22 is connected via a boiler drain manifold 38. The heat pipe 22 of the shell 1 connected to the boiler drain manifold 38 is connected to the raw material gas inlet manifold 35; the heat pipe 22 of the shell 1 connected to the boiler feedwater manifold 37 is connected to the reactant outlet pipe 36.

[0031] The shell 1 is further provided with a heat-conducting pipe assembly 2, which includes several bottom frames 21, such as... Figure 2 and Figure 3 As shown, several bottom frames 21 are arranged laterally and cover the inner cross-section of the shell 1. The bottom frames 21 are located at the second interface 12 end of the shell 1. The heat-conducting pipes 22 on the bottom frames 21 are heat-conducting curved pipes 221, as shown. Figure 5As shown, the heat-conducting curved tube 221 extends from the lower end of the bottom frame 21, extends towards the end of the first interface 11 of the shell 1 and bends back and forth, extends to the port of the first interface 11 and extends back and bends back and forth, finally extending from the upper end of the bottom frame 21. The heat-conducting tube assembly 2 also includes a heat medium inlet pipe 23 and a heat medium outlet pipe 24, which are respectively connected to the two ends of the heat-conducting curved tube 221, as shown. Figure 2 and Figure 6 As shown, the heat medium inlet pipe 23 and the heat medium outlet pipe 24 extend from the outside of the shell 1 into the inside and extend to the end of the second interface 12. The heat medium outlet pipe 24 and the heat medium inlet pipe 23 are respectively connected to a centralized arc-shaped pipe 29. The centralized arc-shaped pipe 29 is provided with several pipe ports 291. The ends of several heat-conducting curved pipes 221 located at the upper and lower ends of the bottom frame 21 are respectively connected to the pipe ports 291 of two centralized arc-shaped pipes 29 through flexible hoses 292. A support rod 25 is fixedly connected to the bottom frame 21. The support rod 25 is provided with an elliptical frame 26 and also includes a drive rod. 31. The drive rod 31 is rotatably disposed inside the cylindrical shell 1. The drive rod 31 is provided with a plurality of eccentric wheels 32, which are arranged along the drive rod 31. The eccentric angles of adjacent eccentric wheels 32 are opposite, and the eccentric radii of all eccentric wheels 32 are the same. The eccentric wheels 32 are respectively supported inside the elliptical frame 26. The outer side of the cylindrical shell 1 is provided with a drive motor 33, which drives the drive rod 31 to rotate, so that when the drive rod 31 rotates, the adjacent bottom frame 21 swings alternately, and the adjacent heat-conducting curved tubes 221 sway alternately.

[0032] In this design, the heat-conducting curved tube 221 bends back and forth inside the shell 1. Compared with the straight heat-conducting tube, the curved heat-conducting curved tube 221 has a larger heat exchange area and higher heat exchange efficiency. Furthermore, driven by the drive motor 33 and the transmission between the eccentric wheel 32 and the elliptical frame 26, several adjacent heat-conducting curved tubes 221 swing back and forth alternately. The curved heat-conducting curved tube 221 agitates the liquid more intensely. During the heat exchange process, it disturbs the flowing liquid with heat exchange in the shell 1 in real time, thereby improving the heat exchange efficiency between the liquid and the heat-conducting curved tube 221.

[0033] In further proposals, such as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the inner side of the first interface 11 end of the cylindrical shell 1 is divided into several through slots 13 by several baffles. A support column 27 is fixed on the bottom frame 21. The support column 27 extends along the cylindrical shell 1 and is fixed with a piston head 28. The piston head 28 corresponds to the shape of the through slot 13. The piston head 28 extends into and moves out of the through slot 13 with the reciprocating movement of the bottom frame 21.

[0034] In this structure, during the reciprocating movement of each bottom frame 21, the piston head 28 is driven to extend into and out of the through groove 13, which makes the liquid flow cross section of the shell 1 at the first interface 11 smaller and change, and the liquid flow becomes more chaotic. Driven by the piston in the through groove 13, the liquid temporarily moves forward and backward along the extension direction of the shell 1, and the heat exchange utilization rate of the liquid to the heat-conducting curved tube 221 is higher.

[0035] In further proposals, such as Figure 5 As shown, several interfering iron pieces 221 are provided along the side of the heat-conducting curved tube 221. As the heat-conducting curved tube 221 swings, the interfering iron pieces 221 move the water flow. The increased number of interfering iron pieces 221 can further disturb the liquid and increase the degree of liquid sloshing in the shell 1.

[0036] In further proposals, such as Figure 2 As shown, a plurality of hollow chambers 14 are provided inside the shell wall of the cylindrical shell 1. The two ends of the hollow chambers 14 are respectively connected to the heat medium outlet pipe 24 and the heat medium inlet pipe 23. The hollow chambers 14 surrounding the inner side of the cylindrical shell 1 are filled with heat-conducting liquid, which can protect the heat of the liquid to be exchanged in the cylindrical shell 1, prevent the liquid heat loss in the cylindrical shell 1, and also increase the heat exchange area.

[0037] Example 2

[0038] like Figure 7 , Figure 8 As shown, the difference between this embodiment and embodiment 1 is that the heat pipe 22 can also be a heat pipe straight tube 223, and the surface of the heat pipe straight tube 223 has six fins 224 vertically distributed.

[0039] In this scheme, the longitudinal fins 224 are inside the shell 1, which can enhance the heat transfer efficiency of the fluid inside the shell 1, increase the convective heat transfer coefficient on the side of the shell 1, ensure that the Reynolds number of the fluid on the side of the shell 1 reaches the turbulent state, and effectively increase the heat transfer area during the reaction process.

[0040] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A Fischer-Tropsch synthesis reactor for jet fuel distillate, characterized in that: The device includes a shell (1), which is hollow inside. The shell (1) has a first interface (11) and a second interface (12) at both ends. A heat pipe assembly (2) is installed inside the shell (1). The heat pipe assembly (2) includes several base frames (21), which are arranged laterally and cover the inner cross-section of the shell (1). The base frames (21) are located at the second interface (12) end of the shell (1). Heat pipes (22) are installed on the base frames (21). The heat pipes (22) extend from the lower end of the base frames (21), extend towards the first interface (11) end of the shell (1), and bend back and forth. They then extend back from the first interface (11) end and bend back and forth, finally exiting from the base frame. (21) Extending out from the upper end, the heat pipe assembly (2) also includes a heat medium inlet pipe (23) and a heat medium outlet pipe (24), the heat medium inlet pipe (23) and the heat medium outlet pipe (24) are respectively connected to the two ends of the heat pipe (22), a support rod (25) is fixedly connected to the bottom frame (21), an elliptical frame (26) is provided on the support rod (25), and a drive rod (31) is also included. Several eccentric wheels (32) are provided on the drive rod (31), the several eccentric wheels (32) have different eccentric angles relative to the drive rod (31) and the same eccentric radius. The eccentric wheels (32) are respectively supported in the elliptical frame (26), and a drive motor (33) is provided on the outside of the shell (1). The drive motor (33) drives the drive rod (31) to rotate. The inner side of the first interface (11) end of the cylindrical shell (1) is divided into several through slots (13) by several baffles. A support column (27) is fixed on the bottom frame (21). The support column (27) extends along the cylindrical shell (1) and is fixed with a piston head (28). The piston head (28) corresponds to the shape of the through slot (13). The piston head (28) extends into and moves out of the through slot (13) with the reciprocating movement of the bottom frame (21).

2. The Fischer-Tropsch synthesis jet fuel distillate reactor according to claim 1, characterized in that: The heat-conducting pipe (22) is a heat-conducting curved pipe (221). Several interfering iron pieces (222) are provided on the side of the pipe wall of the heat-conducting curved pipe (221). As the heat-conducting curved pipe (221) swings, the interfering iron pieces (222) move the water flow.

3. The Fischer-Tropsch synthesis jet fuel distillate reactor according to claim 1, characterized in that: The shell (1) has several hollow chambers (14) inside its shell wall. The two ends of the hollow chambers (14) are connected to the heat medium outlet pipe (24) and the heat medium inlet pipe (23), respectively.

4. The Fischer-Tropsch synthesis jet fuel distillate reactor according to claim 1, characterized in that: The heat medium inlet pipe (23) and heat medium outlet pipe (24) extend from the outside of the shell (1) into the inside and extend to the second interface (12). The heat medium outlet pipe (24) and heat medium inlet pipe (23) are respectively connected to a centralized arc pipe (29). The centralized arc pipe (29) is provided with several pipe openings (291). The ends of several heat-conducting curved pipes (221) located at the upper and lower ends of the bottom frame (21) are respectively connected to the pipe openings (291) of the two centralized arc pipes (29) through hoses (292).

5. A Fischer-Tropsch synthesis jet fuel distillate reactor according to claim 1, characterized in that: The heat pipe (22) is a heat-conducting straight pipe (223), and several fins (224) are vertically distributed on the surface of the heat-conducting straight pipe (223).

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