A fixed bed reactor for the fischer-tropsch synthesis

Abstract

The utility model discloses a kind of fixed bed reactors for fischer-tropsch synthesis, it is related to fischer-tropsch synthesis technical field, including base, the top of the base is provided with tank, the inner wall of the tank is connected with feed pipe, the inner wall of the tank is provided with first baffle, the below of the first baffle is provided with multiple groups of heat exchange pipes, the utility model has beneficial effect as follows: by first baffle and heat exchange pipe cooperation, heat exchange can be conducive, by second baffle and gas guide pipe realize gas-liquid separation and gas export, the setting of water guide pipe can facilitate liquid discharge, by annular drainage plate help liquid uniform flow, by the structure of cooling assembly serpentine and gradually descending, can increase and tank contact area, strengthen cooling effect, the setting of inlet pipe, drain pipe and first flange plate can be conveniently connected with external pipeline, beneficial to cooling liquid circulation, effectively control reaction temperature, guarantee fischer-tropsch synthesis reaction stable and efficient, improve product quality and output.

Description

Technical Field

[0001] This utility model relates to the field of Fischer-Tropsch synthesis technology, and in particular to a fixed-bed reactor for Fischer-Tropsch synthesis. Background Technology

[0002] Fischer-Tropsch synthesis is a chemical process that converts carbon monoxide and hydrogen into liquid hydrocarbon fuels under the action of a catalyst. By controlling the reaction conditions, it can produce products such as gasoline, diesel, paraffin, and oxygenated compounds. Its core advantage lies in converting carbon-containing resources such as coal, natural gas, or biomass into clean liquid fuels, reducing dependence on petroleum. Moreover, the products have low sulfur content and good environmental performance, and have important application value in the fields of energy diversification and chemical raw material preparation.

[0003] Fischer-Tropsch synthesis is an important indirect coal liquefaction technology that converts syngas into liquid fuels and chemicals, playing a crucial role in energy conversion and utilization. Fixed-bed reactors, as the core equipment in Fischer-Tropsch synthesis, directly affect the efficiency of the synthesis reaction and the quality of the products. However, existing fixed-bed reactors generate a large amount of heat during the reaction process. If this heat is not removed in a timely and effective manner, it will cause a sharp rise in the reactor temperature, which will not only reduce the activity and lifespan of the catalyst but also trigger side reactions, affecting the selectivity of the target product and reducing production efficiency. Furthermore, the gaseous and liquid products generated during the reaction cannot be properly guided and separated, making it difficult to ensure the continuous and stable progress of the reaction and the smooth collection of the products. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A fixed-bed reactor for Fischer-Tropsch synthesis includes a base, a tank body disposed above the base, a feed pipe communicating with the inner wall of the tank body, a first baffle plate disposed on the inner wall of the tank body, and multiple sets of heat exchange tubes disposed below the first baffle plate.

[0007] The inner wall of the tank is provided with a second baffle, and the inner wall of the second baffle is connected to multiple sets of vertically arranged air guide pipes. The bottom of the first baffle is connected to a water guide pipe. The inner wall of the tank is provided with a flow guide plate, and the flow guide plate is designed with a ring structure. The outer side of the tank is provided with a cooling component.

[0008] The cooling assembly includes a liquid storage pipe disposed on the outside of the tank body. The liquid storage pipe has a serpentine and gradually descending structure design. One end of the liquid storage pipe located on the outside of the tank body is connected to a water inlet pipe, and the other end of the liquid storage pipe located below the tank body is connected to a drain pipe. The other ends of the water inlet pipe and the drain pipe are each provided with a first flange.

[0009] As a preferred embodiment of the fixed-bed reactor for Fischer-Tropsch synthesis described in this utility model, the base is internally fixed with two sets of vertically arranged fixing rods, and multiple sets of horizontally arranged connecting rods are fixed between the two sets of fixing rods.

[0010] As a preferred embodiment of the fixed-bed reactor for Fischer-Tropsch synthesis described in this utility model, the base is provided with four sets of casters at its bottom, and a push rod is fixed to the back of the base.

[0011] As a preferred embodiment of the fixed-bed reactor for Fischer-Tropsch synthesis described in this utility model, a mounting frame is installed on one side of the base, four sets of mounting seats are fixed on the outside of the tank, and the bottom of the mounting seats is fixedly connected to the top of the mounting frame by screws.

[0012] As a preferred embodiment of the fixed-bed reactor for Fischer-Tropsch synthesis described in this utility model, the top of the tank is fitted with a top cover by screws, and a sealing ring is provided at the connection between the top cover and the tank.

[0013] As a preferred embodiment of the fixed-bed reactor for Fischer-Tropsch synthesis described in this utility model, the top of the top cover is respectively connected to a steam outlet pipe and an exhaust pipe, and the top of the steam outlet pipe is provided with a sealing cap, and the top of the exhaust pipe is provided with a connecting flange.

[0014] As a preferred embodiment of the fixed-bed reactor for Fischer-Tropsch synthesis described in this utility model, the bottom of the tank is connected to three sets of discharge pipes, and the bottom of the discharge pipes is provided with a second flange.

[0015] In summary, this utility model has the following beneficial effects:

[0016] The first baffle plate, in conjunction with the heat exchange tube, facilitates heat exchange. The second baffle plate, in conjunction with the gas guide pipe, enables gas-liquid separation and gas extraction. The water guide pipe facilitates liquid discharge. The annular guide plate helps ensure uniform liquid flow. The serpentine and gradually descending structure of the cooling components increases the contact area with the tank, enhancing the cooling effect. The inlet pipe, outlet pipe, and first flange facilitate connection to external pipelines, promoting coolant circulation, effectively controlling the reaction temperature, ensuring the stable and efficient conduct of the Fischer-Tropsch synthesis reaction, and improving product quality and yield. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is an overall structural diagram of a fixed-bed reactor used for Fischer-Tropsch synthesis.

[0019] Figure 2 This is a structural diagram of the base of a fixed-bed reactor used for Fischer-Tropsch synthesis.

[0020] Figure 3 This is a tank structure diagram of a fixed-bed reactor used for Fischer-Tropsch synthesis.

[0021] Figure 4 This is a structural diagram of the top cover of a fixed-bed reactor used for Fischer-Tropsch synthesis.

[0022] Figure 5 This is a structural diagram of the cooling assembly of a fixed-bed reactor used for Fischer-Tropsch synthesis.

[0023] Labels in the diagram: 1. Base; 2. Tank body; 3. Feed pipe; 4. First baffle; 5. Heat exchange pipe; 6. Second baffle; 7. Gas guide pipe; 8. Water guide pipe; 9. Drain plate; 10. Cooling assembly; 101. Liquid storage pipe; 102. Water inlet pipe; 103. Drain pipe; 104. First flange; 11. Fixing rod; 12. Connecting rod; 13. Caster wheel; 14. Push rod; 15. Mounting bracket; 16. Mounting base; 17. Top cover; 18. Sealing ring; 19. Steam outlet pipe; 20. Exhaust pipe; 21. Discharge pipe; 22. Second flange. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1:

[0028] Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a fixed-bed reactor for Fischer-Tropsch synthesis, including a base 1, a tank 2 disposed above the base 1, a feed pipe 3 connected to the inner wall of the tank 2, a first baffle 4 disposed on the inner wall of the tank 2, and multiple sets of heat exchange tubes 5 disposed below the first baffle 4.

[0029] The base 1 serves as the supporting foundation for the entire reactor, providing a stable mounting platform for other components and bearing the overall weight of the reactor. The tank 2 is the main site of the Fischer-Tropsch synthesis reaction, providing a closed space for the reaction to allow the reactants to undergo chemical reactions under specific temperature and pressure conditions. The feed pipe 3 is used to transport the raw materials participating in the Fischer-Tropsch synthesis reaction into the tank 2, ensuring the continuous progress of the reaction. The first baffle 4 is used to divide the internal space of the tank 2 into different areas, and also to control the flow path of the reactants, separate substances of different phases, or provide installation space for the heat exchange tubes 5, which helps to optimize the reaction process and improve reaction efficiency. Multiple sets of heat exchange tubes 5 are located below the first baffle 4 to regulate the temperature inside the tank 2. In the Fischer-Tropsch synthesis reaction, temperature is an important control parameter. The heat exchange tubes 5 can be circulated with heat exchange media of different temperatures, such as hot water, steam, or cooling water, through an external heat exchange medium circulation system. By adjusting the flow rate of the circulation system and the temperature control device, the reaction temperature can be precisely controlled within a suitable range.

[0030] The inner wall of the tank 2 is provided with a second baffle 6, and the inner wall of the second baffle 6 is connected to multiple sets of vertically arranged air guide pipes 7. The bottom of the first baffle 4 is connected to a water guide pipe 8. The inner wall of the tank 2 is provided with a flow guide plate 9, and the flow guide plate 9 is designed with a ring structure. The outer side of the tank 2 is provided with a cooling component 10.

[0031] The second baffle 6 is used to further divide the internal space of the tank 2. The gas guide pipe 7 adopts a uniform distribution design to ensure that the gas can be evenly distributed in the tank 2 and fully contact the reactants, thereby improving the mass transfer efficiency of the reaction. The water guide pipe 8 is used to discharge water or other liquid products generated in the area above the first baffle 4. The annular structure design of the guide plate 9 allows the liquid to flow evenly along its surface. Through reasonable slope and surface treatment, it prevents the liquid from accumulating or blocking during the guide process, ensuring that the liquid flows smoothly to the discharge pipe 21. The cooling component 10 is installed in actual operation. According to the reaction temperature in the tank 2, the flow rate and temperature of the cooling water can be adjusted to ensure that the cooling effect meets the reaction requirements. For example, when the reaction temperature is too high, the flow rate of the cooling water can be increased or the temperature of the cooling water can be decreased.

[0032] The cooling assembly 10 includes a liquid storage pipe 101 disposed on the outside of the tank body 2. The liquid storage pipe 101 has a serpentine and gradually descending structure design. One end of the liquid storage pipe 101 located on the outside of the tank body 2 is connected to a water inlet pipe 102, and the other end of the liquid storage pipe 101 located below the tank body 2 is connected to a drain pipe 103. The other ends of the water inlet pipe 102 and the drain pipe 103 are both provided with a first flange 104.

[0033] The storage pipe 101 has a serpentine and gradually descending structure. This structure increases the flow path and residence time of the cooling water outside the tank 2, allowing the cooling water to fully absorb the heat of the tank 2 and improve the cooling effect. The inlet pipe 102 is used to introduce cooling water into the storage pipe 101, providing a source of cooling water for the cooling process. The drain pipe 103 is used to discharge the cooling water whose temperature rises after absorbing heat. The first flange 104 facilitates the connection and disconnection between the inlet pipe 102 and the cooling water supply source and between the drain pipe 103 and the cooling water collection device, improving the flexibility and maintainability of the device. In use, the cooling water source is first connected to the inlet pipe 102 through the first flange 104, and the cooling water is then introduced into the storage pipe 101 through the inlet pipe 102. At this time, the cooling water will flow along the path of the storage pipe 101, absorbing the heat of the tank 2. At the same time, the cooling water collection device is connected to the drain pipe 103 through the first flange 104, which facilitates the recovery of the cooling water that has absorbed heat.

[0034] Example 2:

[0035] This is the second embodiment of the present invention, which is based on the previous embodiment.

[0036] Specifically, the base 1 has two sets of vertically arranged fixing rods 11 fixed inside, and multiple sets of horizontally arranged connecting rods 12 are fixed between the two sets of fixing rods 11.

[0037] Multiple sets of horizontally arranged connecting rods 12 are fixed between the two sets of fixing rods 11, which can enhance the structural strength and stability of the base 1, enabling the base 1 to better bear the weight of the upper tank 2 and other components and the various forces generated during the reaction process.

[0038] Specifically, the bottom of the base 1 is provided with four sets of casters 13, and a push rod 14 is fixed to the back of the base 1.

[0039] The movable wheels 13 facilitate the movement of the reactor, making it easy to transport to different work locations or adjust its position. The push rod 14, in conjunction with the movable wheels 13, allows the operator to move the reactor by pushing the push rod 14 and using the movable wheels 13, thus improving the reactor's mobility and ease of operation.

[0040] Specifically, a mounting bracket 15 is installed on one side of the base 1, and four sets of mounting seats 16 are fixed on the outside of the tank body 2, with the bottom of the mounting seat 16 being fixedly connected to the top of the mounting bracket 15 by screws.

[0041] By using the mounting base 16 in conjunction with the mounting bracket 15, the connection stability between the tank 2 and the base 1 can be further enhanced, ensuring that the tank 2 will not be displaced or shaken due to vibration or other reasons during the reaction process.

[0042] Example 3:

[0043] This is the third embodiment of the present invention, which is based on the first two embodiments.

[0044] Specifically, a top cover 17 is installed on the top of the tank body 2 by screws, and a sealing ring 18 is provided at the connection between the top cover 17 and the tank body 2.

[0045] The top cover 17 forms a closed reaction space with the tank body 2. The top cover 17 is removable, which facilitates the maintenance, cleaning and catalyst replacement of the inside of the tank body 2. The sealing ring 18 can play a sealing role to prevent gas or liquid leakage during the reaction process and ensure the pressure stability and safety of the reaction system.

[0046] Specifically, the top of the top cover 17 is connected to a steam outlet pipe 19 and an exhaust pipe 20, and the top of the steam outlet pipe 19 is provided with a sealing cap, and the top of the exhaust pipe 20 is provided with a connecting flange.

[0047] The steam outlet pipe 19 is used to discharge the steam generated during the reaction process. The sealing cap at the top of the steam outlet pipe 19 can keep it sealed when venting is not required, preventing outside air from entering the reaction system. When venting is required, the sealing cap can be opened. The exhaust pipe 20 is used to discharge other gaseous products generated during the reaction process or to regulate the pressure of the reaction system. The connecting flange at the top of the exhaust pipe 20 can be easily connected to other pipes or equipment to realize the transportation or further processing of gas.

[0048] Specifically, the bottom of the tank 2 is connected to three sets of discharge pipes 21, and the bottom of the discharge pipes 21 is provided with a second flange 22.

[0049] The discharge pipe 21 is used to discharge the solid or liquid products generated after the reaction. The second flange 22 at the bottom of the discharge pipe 21 can be easily connected to subsequent product collection, processing or conveying equipment.

[0050] Working Principle: Before the reaction begins, the reactants are fed into the tank 2 via the feed pipe 3. At this time, the cooling assembly 10 starts operating. Cooling water is connected to the cooling water supply source via the first flange 104 on the inlet pipe 102 and then enters the storage pipe 101. Due to the serpentine and gradually descending design of the storage pipe 101, the cooling water fully absorbs heat from the tank 2 during its flow. Afterwards, it is recovered via the drain pipe 103 and its first flange 104 connected to a cooling water collection device. This controls the reaction temperature and prevents overheating that could lead to catalyst deactivation or side reactions. During the reaction, the tank 2 is divided into different areas by the first baffle 4 to optimize the flow path of the reactants. A heat exchange medium at a suitable temperature is introduced through the heat exchange pipe 5 to further regulate the temperature inside the tank, ensuring the reaction proceeds under suitable conditions. The space is further divided by the second baffle 6, and the gas is guided uniformly through the gas guide pipe 7. The liquid is evenly distributed and in full contact with the reactants to improve mass transfer efficiency. The liquid flow is guided by the guide plate 9 and concentrated towards the discharge pipe 21. As the reaction progresses, the generated steam is discharged through the steam outlet pipe 19. When no venting is required, the sealing cap at the top of the steam outlet pipe 19 can prevent outside air from entering. Other gaseous products or when the pressure of the reaction system needs to be adjusted, can be discharged through the exhaust pipe 20. The connecting flange at the top facilitates connection with other equipment. After the reaction is completed, the solid or liquid products generated by the reaction are discharged through the three sets of discharge pipes 21 at the bottom of the tank 2. The second flange 22 at the bottom of the discharge pipe 21 facilitates connection with subsequent product collection, processing or conveying equipment. In addition, the fixing rod 11 and connecting rod 12 of the base 1 can enhance the structural stability. The moving wheel 13 and push rod 14 can facilitate the movement of the reactor. The mounting seat 16 and mounting frame 15 ensure a stable connection between the tank 2 and the base 1.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fixed-bed reactor for Fischer-Tropsch synthesis, comprising a base (1), characterized in that: A tank (2) is provided above the base (1), and a feed pipe (3) is connected to the inner wall of the tank (2). A first partition (4) is provided on the inner wall of the tank (2), and multiple sets of heat exchange tubes (5) are provided below the first partition (4). The inner wall of the tank (2) is provided with a second partition (6), and the inner wall of the second partition (6) is connected to multiple sets of vertically arranged air guide pipes (7). The bottom of the first partition (4) is connected to a water guide pipe (8). The inner wall of the tank (2) is provided with a diversion plate (9), and the diversion plate (9) is designed with a ring structure. The outer side of the tank (2) is provided with a cooling component (10). The cooling assembly (10) includes a liquid storage pipe (101) disposed on the outside of the tank body (2). The liquid storage pipe (101) has a serpentine and gradually descending structure design. One end of the liquid storage pipe (101) located on the outside of the tank body (2) is connected to a water inlet pipe (102), and the other end of the liquid storage pipe (101) located below the tank body (2) is connected to a drain pipe (103). The other ends of the water inlet pipe (102) and the drain pipe (103) are both provided with a first flange (104).

2. The fixed-bed reactor for Fischer-Tropsch synthesis as described in claim 1, characterized in that: The base (1) has two sets of vertically arranged fixing rods (11) fixed inside, and multiple sets of horizontally arranged connecting rods (12) are fixed between the two sets of fixing rods (11).

3. The fixed-bed reactor for Fischer-Tropsch synthesis as described in claim 1, characterized in that: The base (1) is provided with four sets of movable wheels (13) at its bottom. A push rod (14) is fixed to the back of the base (1).

4. The fixed-bed reactor for Fischer-Tropsch synthesis as described in claim 1, characterized in that: A mounting bracket (15) is installed on one side of the base (1), and four sets of mounting seats (16) are fixed on the outside of the tank (2), and the bottom of the mounting seat (16) is fixedly connected to the top of the mounting bracket (15) by screws.

5. The fixed-bed reactor for Fischer-Tropsch synthesis as described in claim 1, characterized in that: The top of the tank (2) is fitted with a top cover (17) by screws, and a sealing ring (18) is provided at the connection between the top cover (17) and the tank (2).

6. The fixed-bed reactor for Fischer-Tropsch synthesis as described in claim 5, characterized in that: The top of the top cover (17) is connected to a steam outlet pipe (19) and an exhaust pipe (20), and the top of the steam outlet pipe (19) is provided with a sealing cap, and the top of the exhaust pipe (20) is provided with a connecting flange.

7. The fixed-bed reactor for Fischer-Tropsch synthesis as described in claim 1, characterized in that: The bottom of the tank (2) is connected to three sets of discharge pipes (21), and the bottom of the discharge pipes (21) is provided with a second flange (22).

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