Novel fixed bed reactor

Abstract

The utility model discloses a novel fixed bed reactor, which relates to the field of fixed bed reactors and comprises a tank body, an upper fixed bed and a lower fixed bed which are symmetrically distributed up and down are arranged in the tank body, and an upper discharge port of an output end of the upper fixed bed is connected with a transition pipe. The output end of the transition pipe is connected with a lower feeding hole of the input end of the lower fixed bed; a spiral cooling pipe is spirally wound on the outer wall of the transition pipe; an airflow heat dissipation mechanism is mounted in the tank body and between the upper fixed bed and the lower fixed bed; and two groups of airflow holes are symmetrically formed in the periphery of the tank body. Through the arrangement of the airflow heat dissipation mechanism, the transition pipe and the spiral cooling pipe, heat generated by heterogeneous reaction can be effectively dissipated without influencing the reaction of gas or liquid and a solid catalyst, so that the problem that the service life of the device is shortened due to severe reaction temperature rise is avoided.

Description

Technical Field

[0001] The utility model relates to the field of fixed-bed reactors, in particular to a novel fixed-bed reactor. Background Technique

[0002] A fixed-bed reactor is a commonly used flow reactor in chemical production. Under normal operating conditions, gas and liquid materials (or only gas materials) flow along the axial direction of the reactor, while the catalyst bed is fixed, hence the name "fixed bed". Inside the fixed-bed reactor, the catalyst is fixed in the reactor bed. When gas or liquid passes through the bed, chemical reactions occur between the reaction materials under the action of the catalyst.

[0003] When the catalyst in the fixed-bed reactor undergoes a heterogeneous reaction with liquid or gas, an exothermic reaction will occur. In the prior art, the continuous exothermic reaction will cause a sharp increase in reaction temperature, affecting the service life of the device.

[0004] In the prior art, the inside of the group is divided into an upper fixed bed and a lower fixed bed for distributed reaction. However, this method can alleviate the reaction temperature rise to a certain extent, but cannot effectively dissipate heat. Summary of the Invention

[0005] The purpose of the utility model is to provide a novel fixed-bed reactor to solve the problems mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A novel fixed-bed reactor, including a tank body. Inside the tank body, there are two upper fixed beds and lower fixed beds symmetrically distributed up and down. The upper discharge port at the output end of the upper fixed bed is connected to a transition pipe. The output end of the transition pipe is connected to the lower feed port at the input end of the lower fixed bed. A spiral cooling pipe is spirally wound around the outer wall of the transition pipe. An air flow heat dissipation mechanism is installed inside the tank body between the upper fixed bed and the lower fixed bed. Two groups of air flow holes are symmetrically opened on the outer periphery of the tank body. A fixed ring is fixedly connected to the position on the outer periphery of the tank body aligned with one group of the air flow holes. The fixed ring is used to provide rotational support for the air flow heat dissipation mechanism, and the air flow holes are used to provide a moving channel for the air flow. A driving mechanism for driving the rotation of the air flow heat dissipation mechanism is installed on the outer periphery of the tank body.

[0007] As a further scheme of the utility model: The driving mechanism includes a driving motor installed on the outer periphery of the tank body through a fixing frame. The output end of the driving motor is connected to a connecting shaft. The connecting shaft penetrates into the inner cavity of one of the fixed rings. An active bevel gear is installed on the outer periphery of the connecting shaft in an interference fit in the inner cavity of the fixed ring. A passive bevel gear is meshed with the outer periphery of the active bevel gear.

[0008] As a further solution of the present utility model: The air flow heat dissipation mechanism includes a rotating ring fixedly installed on the inner wall of the fixed ring. A transmission shaft is rotatably installed in the central annular part of the rotating ring. One end of the transmission shaft is fixedly installed with a fan blade in the inner cavity of the fixed ring. The other end of the transmission shaft is fixedly connected with a synchronous pulley. The synchronous pulleys are connected by a synchronous belt. The driven bevel gear is press-fitted on the outer wall of the transmission shaft.

[0009] As a further solution of the present utility model: A pressure wheel for pressing the synchronous belt inward is arranged outside the synchronous pulley at the middle position. One end of the pressure wheel is rotatably installed with a support frame fixedly connected to the inner wall of the tank body.

[0010] As a further solution of the present utility model: The input end of the upper fixed bed is connected with an upper feed port penetrating above the outside of the tank body, and the output end of the lower fixed bed is connected with a lower discharge port penetrating below the outside of the tank body.

[0011] As a further solution of the present utility model: An installation box connected to the tank body is arranged outside the transition pipe. The input end and the output end of the spiral cooling pipe both penetrate outside the installation box. The input end of the spiral cooling pipe is connected with a pump through a pipeline. The water pump is connected with a cooling pool through a pipeline. The output end of the spiral cooling pipe is connected with the cooling pool through a pipeline.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] By setting the air flow heat dissipation mechanism, the transition pipe and the spiral cooling pipe, the heat generated by the heterogeneous reaction can be effectively dissipated without affecting the reaction between gas or liquid and solid catalyst, thereby avoiding the problem of reduced service life of the device caused by the sharp reaction temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic internal structural diagram of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the air flow heat dissipation mechanism of the present utility model;

[0017] Figure 4 is a schematic installation structural diagram of the fan blade of the present utility model.

[0018] In the figure: 1, tank body; 2, air flow holes; 3, fixing ring; 4, installation box; 5, passive bevel gear; 6, upper feeding port; 7, lower discharging port; 8, upper fixed bed; 9, lower fixed bed; 10, upper discharging port; 11, lower feeding port; 12, transition pipe; 13, spiral cooling pipe; 14, fan blades; 15, transmission shaft; 16, synchronous pulley; 17, rotating ring; 18, synchronous belt; 19, pressing wheel; 20, support frame; 21, driving motor; 22, connecting shaft; 23, active bevel gear. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 4 , in the embodiment of the present invention, a novel fixed bed reactor includes a tank body 1. Inside the tank body 1, there are two upper fixed beds 8 and lower fixed beds 9 that are symmetrically distributed up and down. The upper discharging port 10 at the output end of the upper fixed bed 8 is connected to a transition pipe 12, and the output end of the transition pipe 12 is connected to the lower feeding port 11 at the input end of the lower fixed bed 9. The outer wall of the transition pipe 12 is spirally wound with a spiral cooling pipe 13; an air flow heat dissipation mechanism is installed inside the tank body 1 between the upper fixed bed 8 and the lower fixed bed 9; two groups of air flow holes 2 are symmetrically opened on the outer periphery of the tank body 1, and a fixing ring 3 is fixedly connected to the position of the outer periphery of the tank body 1 that is aligned with a group of air flow holes 2; the fixing ring 3 is used to provide rotational support for the air flow heat dissipation mechanism, and the air flow holes 2 are used to provide a moving channel for the air flow; a driving mechanism for driving the rotation of the air flow heat dissipation mechanism is installed on the outer periphery of the tank body 1. The input end of the upper fixed bed 8 is connected to an upper feeding port 6 that penetrates above the outside of the tank body 1, and the output end of the lower fixed bed 9 is connected to a lower discharging port 7 that penetrates below the outside of the tank body 1.

[0021] In this embodiment: First, gas or liquid raw materials enter the upper fixed bed 8 through the upper feeding port 6 and come into contact with the solid catalyst in the upper fixed bed 8 to achieve a heterogeneous reaction process. Then, the gas or liquid that passes through the fixed catalyst is discharged from the upper discharging port 10 and enters the transition pipe 12. Then, it enters the lower feeding port 11 through the transition pipe 12, enters the lower fixed bed 9 through the lower feeding port 11, comes into contact with the fixed catalyst in the lower fixed bed 9 again, and undergoes a heterogeneous reaction again. After the reaction is completed, it is discharged from the lower discharging port 7;

[0022] In the above process, the air flow cooling mechanism is driven by the driving mechanism, and the generated wind sucks air into the interior of the tank body 1 and discharges it from another air flow hole 2. At the same time, the refrigerant flowing through the spiral cooling pipe 13 can also cool the liquid or gas passing through the transition pipe 12, thus avoiding the sharp temperature rise caused by the exothermic reaction during the reaction process.

[0023] Please refer specifically to Figure 3 and Figure 4 , the driving mechanism includes a driving motor 21 installed on the outer periphery of the tank body 1 through a fixing bracket. The output end of the driving motor 21 is connected with a connecting shaft 22. The connecting shaft 22 penetrates into the inner cavity of a fixing ring 3. An active bevel gear 23 is installed on the outer periphery of the connecting shaft 22 in the inner cavity of the fixing ring 3 by interference fit, and a passive bevel gear 5 is engaged with the outer periphery of the active bevel gear 23.

[0024] In this embodiment: By starting the driving motor 21, the driving motor 21 drives the connecting shaft 22 to rotate through a coupling. The bearing assembled between the connecting shaft 22 and the fixing ring 3 can reduce the friction between the two. At the same time, the rotation of the connecting shaft 22 drives the active bevel gear 23 to rotate, and the active bevel gear 23 drives the passive bevel gear 5 to rotate.

[0025] Please refer specifically to Figure 4 and Figure 4 , the air flow cooling mechanism includes a rotating ring 17 fixedly installed on the inner wall of the fixing ring 3. A transmission shaft 15 is rotatably installed in the central annular part of the rotating ring 17. A fan blade 14 is fixedly installed at one end of the transmission shaft 15 in the inner cavity of the fixing ring 3. Synchronous wheels 16 are fixedly connected to the other ends of the transmission shafts 15. The synchronous wheels 16 are connected by a synchronous belt 18 in a transmission manner, and the passive bevel gear 5 is installed on the outer wall of the transmission shaft 15 by interference fit.

[0026] In this embodiment: When the passive bevel gear 5 rotates, the transmission shaft 15 rotates accordingly. The transmission shaft 15 drives the synchronous wheel 16 connected thereto to rotate. The synchronous wheel 16 drives the other two synchronous wheels 16 to rotate through the synchronous belt 18, so as to realize the synchronous and same-direction rotation of the three transmission shafts 15. The three rotating transmission shafts 15 can drive the three fan blades 14 to rotate, and the rotation of the fan blades 14 can suck air into the tank body 1.

[0027] Please refer specifically to Figure 3 , a pressing wheel 19 for pressing the synchronous belt 18 inward is arranged outside the synchronous wheel 16 at the middle position. A support frame 20 fixedly connected to the inner wall of the tank body 1 is rotatably installed at the center of one end of the pressing wheel 19.

[0028] In this embodiment: The setting of the pressing wheel 19 can ensure that the wrap angle between the synchronous belt 18 and the synchronous wheel 16 at the center meets the transmission requirements and avoid the phenomenon of transmission slipping.

[0029] Please refer with emphasis to Figure 4 , an installation box 4 connected to the tank body 1 is arranged outside the transition pipe 12. The input end and the output end of the spiral cooling pipe 13 both penetrate to the outside of the installation box 4. The input end of the spiral cooling pipe 13 is connected to a pump through a pipeline, the water pump is connected to a cooling pond through a pipeline, and the output end of the spiral cooling pipe 13 is connected to the cooling pond through a pipeline.

[0030] In this embodiment: Start the water pump. The water pump sucks the refrigerant in the cooling pond into the spiral cooling pipe 13. The refrigerant entering the spiral cooling pipe 13 undergoes a heat exchange reaction with the air in the installation box 4, thereby reducing the temperature in the installation box 4, and thus cooling the gas or liquid in the transition pipe 12.

[0031] The above-mentioned is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A novel fixed-bed reactor, comprising a tank body (1), wherein two upper fixed beds (8) and lower fixed beds (9) which are symmetrically distributed up and down are arranged inside the tank body (1), and it is characterized in that, The upper discharge port (10) at the output end of the upper fixed bed (8) is connected to a transition pipe (12). The output end of the transition pipe (12) is connected to the lower feed port (11) at the input end of the lower fixed bed (9). A spiral cooling pipe (13) is spirally wound around the outer wall of the transition pipe (12). An air flow heat dissipation mechanism is installed inside the tank body (1) between the upper fixed bed (8) and the lower fixed bed (9). Two groups of air flow holes (2) are symmetrically formed on the outer periphery of the tank body (1). A fixed ring (3) is fixedly connected to the outer periphery of the tank body (1) at a position aligned with one group of the air flow holes (2). A driving mechanism for driving the air flow heat dissipation mechanism to rotate is installed on the outer periphery of the tank body (1).

2. A novel fixed-bed reactor according to claim 1, characterized in that, The driving mechanism includes a driving motor (21) installed on the outer periphery of the tank body (1) through a fixing frame. The output end of the driving motor (21) is connected to a connecting shaft (22). The connecting shaft (22) penetrates into the inner cavity of one of the fixed rings (3). An active bevel gear (23) is press-fitted on the outer periphery of the connecting shaft (22) inside the inner cavity of the fixed ring (3). A passive bevel gear (5) is meshed with the outer periphery of the active bevel gear (23).

3. A novel fixed-bed reactor according to claim 2, wherein, The air flow heat dissipation mechanism includes a rotating ring (17) fixedly installed on the inner wall of the fixed ring (3). A transmission shaft (15) is rotatably installed in the central annular part of the rotating ring (17). A fan blade (14) is fixedly installed at one end of the transmission shaft (15) inside the inner cavity of the fixed ring (3). Synchronous wheels (16) are fixedly connected to the other ends of the transmission shaft (15). The synchronous wheels (16) are connected by a synchronous belt (18). The passive bevel gear (5) is press-fitted on the outer wall of the transmission shaft (15).

4. A novel fixed bed reactor according to claim 3, characterized in that, A pressing wheel (19) for pressing the synchronous belt (18) inward is arranged outside the middle synchronous wheel (16). A support frame (20) fixedly connected to the inner wall of the tank body (1) is rotatably installed at the center of one end of the pressing wheel (19).

5. A novel fixed-bed reactor according to claim 1, characterized in that, The input end of the upper fixed bed (8) is connected to an upper feed port (6) that penetrates above the outside of the tank body (1). The output end of the lower fixed bed (9) is connected to a lower discharge port (7) that penetrates below the outside of the tank body (1).

6. A novel fixed bed reactor according to claim 1, characterized in that, An installation box (4) connected to the tank body (1) is arranged outside the transition pipe (12). The input end and the output end of the spiral cooling pipe (13) both penetrate outside the installation box (4). The input end of the spiral cooling pipe (13) is connected to a pump through a pipe. The water pump is connected to a cooling pool through a pipe. The output end of the spiral cooling pipe (13) is connected to the cooling pool through a pipe.

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