Fixed bed for evaluating catalyst performance

Abstract

The utility model discloses a fixed bed for evaluating the performance of a catalyst, which comprises a reaction kettle body, a stirring paddle is rotatably arranged in the reaction kettle body, the stirring paddle is a hollow shell, a plurality of air outlet holes are arranged on the surface of the stirring paddle, and an air inlet pipeline is communicated above the stirring paddle. According to the device, the air inlet flow can be adjusted, so that variable control over the catalytic reaction process is achieved, and the stability and reliability of experimental data are improved.

Description

Technical Field

[0001] This utility model relates to the field of gas-liquid reaction equipment, specifically to a fixed bed for evaluating catalyst performance. Background Technology

[0002] Catalysis technology has important applications in many industrial fields. The level of catalysis technology is one of the most important indicators for measuring the technological level of many modern industrial fields. According to statistics, more than 90% of existing chemical processes are carried out with the help of catalysis technology.

[0003] Currently, fixed beds are commonly used evaluation devices for gas-liquid reaction catalytic systems. The reactant gas enters the reaction system through an inlet pipe. Due to the restrictive nature of the gas channel, the contact surface between the reaction system and the gas is unevenly distributed, thus affecting the completeness of the reaction. Because different catalysts have different particle sizes, existing fixed beds are equipped with baffles of various sizes. Selecting different baffles based on the catalyst particle size results in the storage, replacement, and cleaning of a large number of baffles of various sizes, which takes considerable time. Utility Model Content

[0004] To address the problems of uneven gas distribution, incomplete catalytic reaction, and numerous baffles in existing fixed-bed technologies, a fixed-bed method for evaluating catalyst performance is provided.

[0005] A fixed bed for evaluating catalyst performance includes a reaction vessel body, in which a stirring paddle is rotatably mounted. The stirring paddle is a hollow shell with multiple stirring paddle vent holes on its surface, and an air inlet pipe is connected above the stirring paddle.

[0006] Preferably, the reactor body is provided with a baffle assembly for placing the catalyst. The baffle assembly includes an upper baffle and a lower baffle. The lower baffle is fixedly connected to the side wall of the reactor body, and the upper baffle is rotatably connected to the side wall of the reactor body.

[0007] Preferably, the center of the upper partition and the center of the lower partition are provided with through holes for the stirring paddle to pass through, and the two through holes are coaxially arranged.

[0008] Preferably, the stirring paddle includes a lower blade and an upper rotating rod, the rotating rod is fitted with a sealing sleeve, and the side of the sealing sleeve is connected to the air intake pipe.

[0009] Preferably, both the rotating rod and the blade are hollow structures, and the rotating rod has multiple air inlets on its side at the part connected to the sealing sleeve.

[0010] Preferably, the air intake pipe is equipped with an air intake valve and a flow meter.

[0011] Preferably, the reactor body is further provided with a vent pipe, and the vent pipe is provided with an outlet valve.

[0012] Preferably, a heating jacket is provided on the outside of the reaction vessel body, and a heater is provided below the heating jacket.

[0013] Beneficial effects

[0014] This invention solves the problem of incomplete catalytic reaction caused by uneven distribution of reaction gas, and can adjust the inlet gas flow rate to achieve variable control of the catalytic reaction process, thereby improving the stability and reliability of experimental data. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 It is a partition assembly structure Figure 1 ;

[0018] Figure 3 It is a partition assembly structure Figure 2 ;

[0019] In the diagram, 1-heater; 2-electric heating jacket; 3-agitator vent; 4-agitator; 5-partition assembly; 6-reactor body; 7-inlet pipe; 8-inlet valve; 9-flow meter; 10-vent valve; 11-vent pipe; 12-stirring motor. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In view of the shortcomings of existing evaluation devices, this utility model discloses a method such as Figure 1 The fixed bed shown is used to evaluate the performance of the catalyst. The fixed bed includes a heater 1, an electric heating jacket 2, a reaction vessel body 6, an inlet valve 8, a flow meter 9, a stirring paddle 4, a baffle assembly 5, a stirring motor 12, a vent valve 10, a vent pipe 11, etc.

[0022] The reactor body 6 is placed in the heating jacket 2, and heat is provided to the reactor body 6 by the heater 1. The reactor body 6 is connected to an air inlet pipe 7, a stirring paddle 4, and a vent pipe 11. Inside the reactor body, there is a baffle assembly 5.

[0023] The air inlet valve 8 and flow meter 9 are sequentially installed on the air inlet pipe 7, before entering the reactor body 6. The air inlet valve 8 can adjust the air inlet flow rate to ensure the stability of the air intake, thereby better controlling experimental variables. The stirring paddle 4 includes a lower blade and an upper rotating rod. Both the rotating rod and the blade are hollow structures. A sealing sleeve is fitted on the outside of the rotating rod. The side of the sealing sleeve is connected to the air inlet pipe. Multiple air inlet holes are provided on the side of the rotating rod at the part connected to the sealing sleeve. The blade is located at the bottom of the reactor, and multiple stirring paddle outlet holes 3 are provided on the blade.

[0024] The vent design increases the contact area between the gas and liquid phases during stirring, improving reaction completeness. The rotor is connected to the stirring motor 12, and the stirring rate is adjusted by controlling the motor frequency. Stirring ensures a more uniform mixture of the reaction system and improves reaction efficiency. The stirring motor 12 is positioned above the reaction vessel body 6 and is fixed by an iron frame.

[0025] The baffle assembly 5 includes an upper baffle and a lower baffle. The lower baffle is fixedly connected to the side wall of the reactor body, and the upper baffle is rotatably connected to the side wall of the reactor body via a bushing, which is fixed by an iron frame. Both the upper and lower baffles have through holes at their centers for the agitator to pass through; these two through holes are coaxially arranged. Multiple small through holes are also provided on both baffles. The baffle assembly 5 is positioned above the agitator blades. Rotating the upper baffle... Figure 2-3 As shown, the size of the small hole formed by the combination of the two baffles can be varied according to the size of the catalyst. The purpose is to prevent the catalyst particles from falling to the bottom of the reactor and to ensure that the catalyst particles have the maximum contact area with the liquid for reaction.

[0026] One end of the vent pipe 11 extends into the reactor body 6 and is positioned above the interior of the reactor; the other end is connected to the vent valve 10. The vent valve 10 is connected to a latex hose, which is placed outdoors for venting.

[0027] The above embodiments and accompanying drawings are only used to illustrate the technical solutions of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model. Other related technical structures not disclosed in detail in this utility model are existing technologies in the art.

Claims

1. A fixed bed for evaluating catalyst performance, characterized in that, The reactor includes a reactor body (6), in which a stirring paddle (4) is rotatably installed. The stirring paddle is a hollow shell with multiple stirring paddle vent holes (3) on its surface. An air inlet pipe (7) is connected above the stirring paddle.

2. A fixed bed for evaluating catalyst performance according to claim 1, characterized in that, The reactor body (6) is provided with a baffle assembly (5) for placing the catalyst. The baffle assembly includes an upper baffle and a lower baffle. The lower baffle is fixedly connected to the side wall of the reactor body (6), and the upper baffle is rotatably connected to the side wall of the reactor body (6).

3. A fixed bed for evaluating catalyst performance according to claim 2, characterized in that, Both the center of the upper partition and the center of the lower partition are provided with through holes for the stirring paddle (4) to pass through, and the two through holes are coaxially arranged.

4. A fixed bed for evaluating catalyst performance according to claim 1, characterized in that, The stirring paddle (4) includes a lower blade and an upper rotating rod. The rotating rod is fitted with a sealing sleeve, and the side of the sealing sleeve is connected to the air intake pipe (7).

5. A fixed bed for evaluating catalyst performance according to claim 4, characterized in that, Both the rotating rod and the blade are hollow structures, and multiple air inlets are provided on the side of the rotating rod where it connects with the sealing sleeve.

6. A fixed bed for evaluating catalyst performance according to claim 1, characterized in that, The intake pipe (7) is equipped with an intake valve (8) and a flow meter (9).

7. A fixed bed for evaluating catalyst performance according to claim 1, characterized in that, The reactor body (6) is also provided with a vent pipe (11), and the vent pipe is provided with a vent valve (10).

8. A fixed bed for evaluating catalyst performance according to claim 1, characterized in that, A heating jacket (2) is provided on the outside of the reactor body (6), and a heater (1) is provided below the heating jacket.

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