Heterogeneous catalytic reaction separation device

Abstract

The utility model discloses a heterogeneous catalytic reaction separation device which comprises a reaction kettle, a built-in filter I, a built-in filter II, a stirring mechanism, a reaction liquid receiving container I, a reaction liquid receiving container II and a control unit, the reaction kettle comprises a kettle body and a kettle cover, and the kettle cover is arranged at the top of the kettle body. A discharging side opening is formed in the side wall of the lower part of the kettle body, the discharging side opening is connected with the reaction liquid receiving container I through a pipeline, and the built-in filter I is arranged at the discharging side opening. A feed liquid emptying opening is formed in the center of the bottom of the kettle body and is connected with a reaction liquid receiving container II through a pipeline, and a built-in filter II is arranged at the feed liquid emptying opening. A solid catalyst discharge port is formed in the adjacent side of the feed liquid emptying port and is connected with a third pipeline. The filter disclosed by the utility model adopts the slotted filter screen, so that solid catalyst particles are prevented from being clamped at meshes of the filter, reactants are fully contacted with the solid catalyst, the catalytic efficiency is high, the quality control of reaction liquid is stable, and the solid catalyst is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of catalytic reaction, in particular to a multi-phase catalytic reaction separation device. Background Art

[0002] Heterogeneous catalytic reactions are common chemical reactions. The main reaction mode is the reaction between liquid reactants and solid catalysts. After the reaction is completed, the reaction liquid and the solid catalyst need to be separated, and the reaction liquid is transferred to the next process, while the solid catalyst continues to remain in the reactor to participate in the next reaction. However, this type of heterogeneous catalytic reaction separation device has problems such as separation of solid catalyst and reaction liquid, reuse of solid catalyst, and reaction conversion rate. How to completely separate the reaction liquid and solid catalyst, reduce environmental pollution during catalyst recovery, and reduce catalyst loss have become the focus of research on heterogeneous catalytic reaction devices. As a typical heterogeneous catalytic reaction, esterification reaction has been studied a lot on the separation of reaction liquid and solid catalyst.

[0003] The Chinese patent with publication number CN114349639A discloses a new method for using a solid catalyst in an esterification reaction, wherein a solid acid catalyst is placed in a packing tube independent of a reactor, and a reaction mixture is circulated between the reactor and the packing tube through a circulating pump to participate in the reaction, thereby avoiding contact between the solid catalyst and mechanical stirring, and the solid catalyst will not be broken, and the amount of solid catalyst used can be effectively saved. Moreover, when the product is taken after each reaction, it is not necessary to filter and remove the solid acid catalyst. However, when this device is used for esterification reaction, the contact area between the reactant and the catalyst is small, the catalytic efficiency is slow, and once the solid catalyst particles are stuck in the mesh on the packing tube, it is extremely difficult for the reactant to pass through the external catalyst particles and contact the internal catalyst particles, resulting in a large difference in esterification conversion between different batches, which is unfavorable for quality control.

[0004] The Chinese patent with the publication number CN204022712U discloses a production device for tricyclodecenyl propionate using solid acid as a catalyst, which uses solid acid as a catalyst to add to the esterification reactor, and the inner wall of the esterification reactor is provided with a U-shaped elbow, and the other end of the elbow is connected to a precision filter, and a wire mesh filter element is filled in the precision filter. After the reaction is completed, the reaction solution is sent to the precision filter with nitrogen pressure for filtration, and the solid-phase catalyst filtered out on the wire mesh filter element is first rinsed with a reaction solvent, and then backwashed into the esterification reactor with nitrogen pressure. The premise of using this device for esterification is that the amount of catalyst is small, and the reaction solution with a solid catalyst can be smoothly transported to the precision filter through a pipeline. If the amount of catalyst required for the reaction is large, the reaction solution with a solid catalyst is very easy to be blocked in the pipeline leading to the filter. Once blocked, the pipeline must be cut and cleaned before it can be used again. With this device, the risk of pipeline blockage is high, and it is difficult to clean after blocking. The catalyst after cleaning is contaminated, and the catalytic efficiency is reduced at the least, and the catalytic effect is lost at the most. Therefore, the prior art needs to be further improved. Utility Model Content

[0005] In view of the deficiencies of the above-mentioned prior art, the purpose of the utility model is to propose a multi-phase catalytic reaction separation device to solve the problems of slow catalytic efficiency of existing catalytic reaction devices, solid catalysts are very easy to get stuck in the mesh of the filter, the risk of clogging is high, and it is difficult to clean after clogging. The cleaned catalyst is easily contaminated, which may reduce the catalytic efficiency at the least and lose the catalytic effect at the worst, which is not conducive to quality control.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A multiphase catalytic reaction separation device comprises a reactor, a first built-in filter, a second built-in filter, a stirring mechanism, a first reaction liquid receiving container, a second reaction liquid receiving container and a control unit. The reactor comprises a reactor body and a reactor cover. The reactor cover is arranged on the top of the reactor body to seal the interior of the reactor body.

[0008] A discharge side port is arranged on the lower side wall of the kettle body, and the discharge side port is connected and communicated with the reaction liquid receiving container through a first pipeline. A built-in filter is detachably installed at the position of the discharge side port, and its main body is located inside the kettle body.

[0009] A liquid discharge port is provided at the bottom center of the kettle body, and the liquid discharge port is connected to the reaction liquid receiving container 2 through a second pipeline. The built-in filter 2 is detachably installed at the position of the liquid discharge port, and its main body is located inside the kettle body. The first pipeline and the second pipeline are respectively provided with a first stop valve.

[0010] A solid catalyst discharge port is also provided at the bottom of the kettle body, and the solid catalyst discharge port is arranged adjacent to one side of the liquid discharge port. The solid catalyst discharge port is connected to a third pipeline, and a first gate valve is provided on the third pipeline.

[0011] The control unit includes a temperature detection sensor, a pressure detection sensor and a PLC controller. The temperature detection sensor is arranged on the upper inner side of the reactor, and the pressure detection sensor is arranged on the bottom of the reactor cover. The temperature detection sensor and the pressure detection sensor are respectively connected to the signal input end of the PLC controller for communication.

[0012] Furthermore, the kettle body is a cylindrical shell with a closed bottom and an open top, and the bottom of the kettle is a hemispherical structure.

[0013] The outer shell is sleeved on the outside of the kettle body. The outer shell is a cylindrical shell and is coaxially arranged relative to the kettle body. The upper end of the outer shell is bent inwardly and sealedly connected to the outer wall of the kettle body. A closed cavity is formed between the inner wall of the outer shell and the outer wall of the kettle body.

[0014] Furthermore, a steam inlet pipe is provided on one side of the upper portion of the outer shell, and a steam outlet pipe is provided on the other side of the lower portion thereof, and a second stop valve is provided on both the steam inlet pipe and the steam outlet pipe.

[0015] Furthermore, the stirring mechanism includes a motor, a driving shaft and a stirring impeller. The driving shaft is vertically arranged at the center of the kettle cover and is rotatably sealed with the kettle cover.

[0016] The motor is arranged above the reaction kettle, and its output end is connected to the upper end of the driving shaft. The stirring impeller is located at the inner side of the lower part of the reaction kettle and is fixedly installed on the upper end of the driving shaft.

[0017] Furthermore, at least two material input pipes are provided on the reactor cover, one end of the material input pipe is communicated with the interior of the reactor, and each material input pipe is provided with a second gate valve.

[0018] The kettle cover is also provided with an inert gas input pipe and an exhaust gas discharge pipe, one end of which is connected to the kettle cover and communicates with the interior of the reactor, and a third stop valve is provided on the inert gas input pipe and the exhaust gas discharge pipe.

[0019] The kettle cover is provided with a catalyst feeding port, and the catalyst feeding port is provided with a cover body.

[0020] Furthermore, the built-in filter 1 and the built-in filter 2 have the same structure, both comprising a slit filter, a frame and a connector, the connector is cylindrical, the frame is fixed to one end of the connector, and the other end of the connector has an outward annular flange.

[0021] The slit filter is a cylindrical shell with one end open, which is sleeved on the outside of the frame and fixedly connected with it as a whole, and its open end is fixedly and sealedly connected with the corresponding end of the connector.

[0022] Furthermore, a first flange seat is provided at the discharge side port of the kettle body, and the first flange seat is detachably connected to one end of the first pipeline via a first joint.

[0023] An O-ring is embedded on the inner wall of the first flange seat, the built-in filter 1 is arranged inside the first flange seat, the connector of the built-in filter 1 is sealed with the first flange seat through the O-ring, and the annular flange of the built-in filter 1 is located at the connection between the first flange seat and the first joint.

[0024] Furthermore, the liquid discharge port of the kettle body is provided with a second flange seat, and the second flange seat is detachably connected to one end of the second pipeline via a second joint.

[0025] The same O-ring is embedded on the inner wall of the second flange seat, the built-in filter 2 is arranged inside the second flange seat, the connector of the built-in filter 2 is sealed with the second flange seat through the O-ring, and the annular flange of the built-in filter 2 is located at the connection between the second flange seat and the second joint.

[0026] Furthermore, the solid catalyst discharge port of the kettle body is provided with a third flange seat, and the third flange seat is detachably connected to one end of the third pipeline through a third joint.

[0027] By adopting the above technical solution, the beneficial technical effect of the utility model is as follows: the filter of the utility model adopts a slit filter screen to prevent the solid catalyst particles from being stuck in the mesh of the filter, the reactants are in full contact with the solid catalyst, and the catalytic efficiency is high. The utility model can simultaneously meet the intermittent reaction operation and the continuous reaction operation, the reaction completion liquid is discharged and collected through the discharge side port, and the bottom liquid containing the catalyst particles is discharged through the liquid discharge port, the quality control is stable, the solid catalyst is easy to replace, and the built-in filter is easy to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The utility model is a schematic diagram of the structural principle of a multiphase catalytic reaction separation device.

[0029] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0030] Figure 3 yes Figure 1 A partial enlarged view of part B.

[0031] Figure 4 It is a schematic structural diagram of the built-in filter of the utility model after the slit filter screen is removed. DETAILED DESCRIPTION

[0032] The utility model is described in detail below with reference to the accompanying drawings:

[0033] Combination Figures 1 to 4 A multiphase catalytic reaction separation device comprises a reactor 1, a built-in filter 1 2, a built-in filter 2 3, a stirring mechanism, a reaction liquid receiving container 1 4, a reaction liquid receiving container 2 5 and a control unit. The reactor 1 comprises a reactor body 11 and a reactor cover 12. The reactor cover 12 is arranged on the top of the reactor body 11 to seal the interior of the reactor body 11. The control unit comprises a temperature detection sensor, a pressure detection sensor and a PLC controller. The temperature detection sensor is arranged on the inner upper part of the reactor 1, and the pressure detection sensor is arranged on the bottom of the reactor cover 12. The temperature detection sensor and the pressure detection sensor are respectively connected to the signal input end of the PLC controller for communication. All parts and connection methods of the control unit adopt the existing technology.

[0034] Specifically, the kettle body 11 is a cylindrical shell with a closed bottom and an open top, and its bottom is a hemispherical structure. The kettle body 11 is provided with an outer shell 6 on the outside, which is a cylindrical shell and is coaxially arranged opposite to the kettle body 11. The upper end of the outer shell 6 is bent inwardly and sealedly connected to the outer wall of the kettle body 11, and a closed cavity 101 is formed between the inner wall of the outer shell 6 and the outer wall of the kettle body 11.

[0035] The outer shell 6 is provided with windows at positions corresponding to the discharge side port and the liquid discharge port. The outer shell 6 is bent toward the side close to the kettle body 11 at the periphery of the window and is fixedly and sealedly connected to the outer wall of the kettle body 11. The discharge side port is located on the inner side of one window, and the liquid discharge port and the solid catalyst discharge port are located on the inner side of another window.

[0036] In addition, a steam inlet pipe 61 is provided on one side of the upper part of the outer shell 6, and a steam outlet pipe 62 is provided on the other side of the lower part thereof. The steam inlet pipe 61 and the steam outlet pipe 62 are both provided with a second stop valve 63, and the second stop valve 63 is an electromagnetic stop valve, and the PLC controller controls the opening of the second stop valve 63 through instructions. The steam generating device continuously feeds high-temperature steam into the interior of the outer shell 6 through the steam inlet pipe 61, heats and keeps the interior of the reactor 1 warm through heat exchange, and the temperature detection sensor monitors and controls the reaction temperature in real time.

[0037] The reactor cover 12 is provided with a catalyst feed port 18 , which is provided with a cover body. Granular solid catalyst is added into the reactor 1 through the catalyst feed port 18 , and then the catalyst feed port 18 is closed by the cover body.

[0038] The kettle cover 12 is provided with two feed ports, each of which is equipped with a material input pipe 13, which is arranged vertically, and its lower end is passed through the kettle cover 12 and communicated with the interior of the reactor 1, and each material input pipe 13 is installed with a second gate valve 14. In the use state, material I and material II are respectively fed into the reactor 1 filled with solid catalyst through the two feed ports, and material I and material II are catalytically reacted under the action of the solid catalyst, and the catalytic reaction is a closed pressure reaction carried out in the reactor 1.

[0039] Specifically, the kettle cover 12 is also provided with an inert gas input pipe 15 and an exhaust gas discharge pipe 16, which are respectively arranged vertically on both sides above the kettle cover 12, and the lower ends of the inert gas input pipe 15 and the exhaust gas discharge pipe 16 are respectively connected to the kettle cover 12 and communicated with the inside of the reactor 1, and the inert gas input pipe 15 and the exhaust gas discharge pipe 16 are both provided with a third stop valve 17. After adding the solid catalyst, material I and material II into the reactor 1, a sufficient amount of inert gas is introduced into the reactor 1 through the inert gas input pipe 15, and after exhausting the air in the reactor 1, the third stop valve 17 on the exhaust gas discharge pipe 16 is closed first, and the pressure detection sensor monitors the pressure inside the reactor 1 in real time. When the pressure in the reactor 1 reaches the set value, the third stop valve 17 on the inert gas input pipe 15 is closed, and the pressure is kept stable during the catalytic reaction process.

[0040] The stirring mechanism includes a motor 71, a drive shaft 72 and a stirring impeller 73. The drive shaft 72 is vertically inserted into the center of the kettle cover 12. The circumferential outer wall of the drive shaft 72 is rotatably sealed with the kettle cover 12 through a shaft seal. The motor 71 is arranged above the reactor 1, and its output end is connected to the upper end of the drive shaft 72. The stirring impeller 73 is located on the inner side of the lower part of the reactor 1 and is fixedly installed on the upper end of the drive shaft 72. During operation, the motor 71 drives the stirring impeller 73 to rotate slowly and uniformly to stir the reaction liquid in the reactor 1 so that the reaction liquid is fully in contact with the solid catalyst.

[0041] A discharge side port is provided on the lower side wall of the kettle body 11, and the discharge side port is connected to the reaction liquid receiving container 4 through a first pipeline 21. The built-in filter 2 is detachably installed at the position of the discharge side port, and its main body is located inside the kettle body 11.

[0042] The internal filter 1 2 and the internal filter 2 3 have the same structure, both comprising a slotted filter 201, a frame 202 and a connector 203, wherein the connector 203 is cylindrical, the frame 202 is fixed to one end of the connector 203, and the other end of the connector 203 has an outward annular flange 204. The slotted filter 201 is a cylindrical shell with one end open, which is sleeved on the outside of the frame 202 and fixedly connected to it as a whole, and its open end is fixedly and sealedly connected to the corresponding end of the connector 203.

[0043] Specifically, the circumferential side wall of the slit filter 201 is composed of a plurality of annular screen bars arranged in sequence at equal intervals along the axial direction of the connector 203, and the end face of the slit filter 201 is composed of a plurality of annular screen bars arranged in concentric circles and having different diameters, the cross-section of the screen bars is V-shaped or isosceles trapezoidal, the inner side of the screen bars is fixedly connected to the skeleton 202 by spot welding, and the gap between any two adjacent screen bars is a trumpet-shaped shape with a narrow outside and a wide inside. The slit filter 201 has high strength and a high porosity, and can filter fine particles. The gap between the screen bars is controlled by the density of the screen bar arrangement, and the minimum slot width can be 15 microns.

[0044] The catalyst particles will not be stuck when passing through the gaps in the screen bars and will be immediately carried away by the reaction liquid. The granular catalyst has only two points of contact with the edge of the screen bar gaps, which greatly reduces the possibility of the granular catalyst getting stuck in the gaps in the screen bars and ensures the filtering effect of the filter during use.

[0045] The discharge side port of the kettle body 11 is provided with a first flange seat 22, one end of the first flange seat 22 is fixedly sealed and connected to the side wall of the kettle body 11 as a whole, and the other end thereof is detachably connected to one end of the first pipeline 21 through a first joint 23. Specifically, an O-ring is embedded on the inner wall of the first flange seat 22, the built-in filter 1-2 is located inside the first flange seat 22, the connector 203 of the built-in filter 1-2 is sealed and matched with the first flange seat 22 through an O-ring, and the annular flange 204 of the built-in filter 1-2 is located at the connection between the first flange seat 22 and the first joint 23.

[0046] A liquid discharge port is provided at the bottom center of the kettle body 11, and the liquid discharge port is connected to the reaction liquid receiving container 2 5 through a second pipeline 31. The built-in filter 2 3 is detachably installed at the position of the liquid discharge port, and its main body is located inside the kettle body 11. The first pipeline 21 and the second pipeline 31 are respectively provided with a first stop valve 24.

[0047] The liquid discharge port of the kettle body 11 is provided with a second flange seat 32, and the second flange seat 32 is detachably connected to one end of the second pipeline 31 through a second joint 33. The same O-ring is embedded on the inner wall of the second flange seat 32, and the built-in filter 23 is arranged inside the second flange seat 32. The connector 203 of the built-in filter 23 is sealed with the second flange seat 32 through an O-ring, and the annular flange 204 of the built-in filter 23 is located at the connection between the second flange seat 32 and the second joint 33.

[0048] A solid catalyst discharge port is also provided at the bottom of the kettle body 11, and the solid catalyst discharge port is arranged adjacent to one side of the liquid discharge port, and the solid catalyst discharge port is connected to a third pipeline 81. The solid catalyst discharge port of the kettle body 11 is provided with a third flange seat 82, and the third flange seat 82 is detachably connected to one end of the third pipeline 81 through a third joint 83. A first gate valve 84 is provided on the third pipeline 81.

[0049] Before adding material I and material II into the reactor 1, the first stop valve 24 on the first pipeline 21 and the second pipeline 31 is closed, and the first gate valve 84 on the third pipeline 81 is also closed. After the catalytic reaction is completed, the reaction liquid enters the reaction liquid receiving container 1 4 through the first pipeline 21 for collection, and the bottom liquid enters the reaction liquid receiving container 2 5 through the second pipeline 31 for collection. When the solid catalyst needs to be replaced during the continuous reaction process, the solid catalyst that does not meet the use requirements can be discharged through the solid catalyst discharge port, and a new solid catalyst can be added from the catalyst feeding port 18.

[0050] The multiphase catalytic reaction separation device of this embodiment can simultaneously meet the requirements of intermittent reaction operation and continuous reaction operation. If the multiphase catalytic reaction speed is slow, in order to ensure the catalytic reaction effect, it is necessary to react in the reactor for a long time, so the reaction liquid receiving container 4 arranged behind the reactor can store the reaction completion liquid to ensure the subsequent continuous operation of the reaction completion liquid. If the multiphase catalytic reaction speed is fast, continuous operation can be carried out, and the catalytic reaction is immediately carried out in the reactor after feeding, and the reaction completion liquid is discharged and collected through the discharge side port at the bottom of the reactor.

[0051] When used for another catalytic reaction, the reaction liquid is first drained through the liquid discharge port, and then the connection between the second joint 33 and the second flange seat 32 is released, the built-in filter 23 is taken out from the inside of the second flange seat 32, and the solid catalyst is rinsed clean through the liquid discharge port with a cleaning liquid.

[0052] The following describes in detail the use of a heterogeneous catalytic reaction separation device with a built-in filter in conjunction with the preparation of dimethyl adipate. The preparation method of dimethyl adipate comprises the following steps:

[0053] Step 1: Add raw material I methanol and raw material II adipic acid into a reactor containing a solid phase resin catalyst and start stirring. Use steam heating to raise the temperature from room temperature to 70-85°C, continuously introduce nitrogen into the reactor, and maintain the pressure in the reactor at 0.2-0.4MPaG.

[0054] The esterification reaction is carried out at a temperature of 70-85°C and a pressure of 0.2-0.4MPaG. Stirring is continued during the esterification process to ensure that adipic acid, methanol and solid phase resin catalyst are fully in contact to achieve the best esterification effect. The catalyst used is a strong acid cationic resin catalyst, the mass ratio of methanol to adipic acid is 1:1.2-1.6, and the optimal reaction time is 3-6 hours.

[0055] After the esterification reaction in step 2 and step 1 is completed, the discharge side port on the lower side of the reactor 1 is opened, and the reaction completion liquid and the catalyst are separated through the built-in filter 2 by the pressure in the reactor and the gravity of the liquid. The reaction completion liquid enters the reaction liquid receiving container 4, while the solid phase resin catalyst remains in the reactor 1 to continue to catalyze the next reaction.

[0056] Step 3: During the continuous catalytic reaction, if the activity of the solid phase resin catalyst in the reactor 1 decreases and cannot meet the use requirements, the reaction completion liquid remaining at the bottom of the reactor 1 is first collected in the reaction liquid receiving container 25 through the liquid discharge port. The solid phase resin catalyst is retained in the reactor 1 through the built-in filter 23. After that, the solid phase resin catalyst remaining at the bottom of the reactor 1 is discharged through the solid catalyst discharge port and a new solid phase resin catalyst is introduced from the catalyst feed port 18, and the esterification reaction continues.

[0057] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0058] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0059] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0060] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A heterogeneous catalytic reaction separation device, characterized in that: The invention comprises a reaction kettle, a first built-in filter, a second built-in filter, a stirring mechanism, a first reaction liquid receiving container, a second reaction liquid receiving container and a control unit. The reaction kettle comprises a kettle body and a kettle cover. The kettle cover is arranged on the top of the kettle body to seal the interior of the kettle body. A discharge side port is provided on the lower side wall of the kettle body, and the discharge side port is connected to the reaction liquid receiving container 1 through a first pipeline, and a built-in filter 1 is detachably installed at the position of the discharge side port, and its main body is located inside the kettle body; A liquid discharge port is provided at the bottom center of the kettle body, and the liquid discharge port is connected to the second reaction liquid receiving container through a second pipeline. The second built-in filter is detachably installed at the position of the liquid discharge port, and its main body is located inside the kettle body. A stop valve is provided on the first pipeline and the second pipeline respectively. A solid catalyst discharge port is also provided at the bottom of the kettle body, and the solid catalyst discharge port is arranged adjacent to one side of the liquid discharge port, and the solid catalyst discharge port is connected to a third pipeline, and a first gate valve is provided on the third pipeline; The control unit includes a temperature detection sensor, a pressure detection sensor and a PLC controller. The temperature detection sensor is arranged on the upper inner side of the reactor, and the pressure detection sensor is arranged on the bottom of the reactor cover. The temperature detection sensor and the pressure detection sensor are respectively connected to the signal input end of the PLC controller for communication.

2. A heterogeneous catalytic reaction separation device according to claim 1, characterized in that: The kettle body is a cylindrical shell with a closed bottom and an open top, and its bottom is a hemispherical structure; The outer shell is sleeved on the outside of the kettle body. The outer shell is a cylindrical shell and is coaxially arranged relative to the kettle body. The upper end of the outer shell is bent inwardly and sealedly connected to the outer wall of the kettle body. A closed cavity is formed between the inner wall of the outer shell and the outer wall of the kettle body.

3. A heterogeneous catalytic reaction separation device according to claim 2, characterized in that: A steam inlet pipe is arranged on one side of the upper part of the outer shell, and a steam outlet pipe is arranged on the other side of the lower part thereof. The steam inlet pipe and the steam outlet pipe are both provided with a second stop valve.

4. A heterogeneous catalytic reaction separation device according to claim 1, characterized in that: The stirring mechanism comprises a motor, a driving shaft and a stirring impeller, wherein the driving shaft is vertically arranged at the center of the kettle cover and cooperates with the kettle cover for rotation and sealing; The motor is arranged above the reaction kettle, and its output end is connected to the upper end of the driving shaft. The stirring impeller is located at the inner side of the lower part of the reaction kettle and is fixedly installed on the upper end of the driving shaft.

5. A heterogeneous catalytic reaction separation device according to claim 1, characterized in that: The kettle cover is provided with at least two material input pipes, one end of which is communicated with the interior of the reactor, and each material input pipe is provided with a second gate valve; The kettle cover is also provided with an inert gas inlet pipe and an exhaust gas discharge pipe, one end of the inert gas inlet pipe and the exhaust gas discharge pipe are connected to the kettle cover and communicate with the interior of the reactor, and the inert gas inlet pipe and the exhaust gas discharge pipe are both provided with a third stop valve; The kettle cover is provided with a catalyst feeding port, and the catalyst feeding port is provided with a cover body.

6. A heterogeneous catalytic reaction separation device according to claim 1, characterized in that: The first built-in filter and the second built-in filter have the same structure, both comprising a slit filter, a frame and a connector, the connector is cylindrical, the frame is fixed to one end of the connector, and the other end of the connector has an outward annular flange; The slit filter is a cylindrical shell with one end open, which is sleeved on the outside of the frame and fixedly connected with it as a whole, and its open end is fixedly and sealedly connected with the corresponding end of the connector.

7. A heterogeneous catalytic reaction separation device according to claim 6, characterized in that: The discharge side port of the kettle body is provided with a first flange seat, and the first flange seat is detachably connected to one end of the first pipeline through a first joint; An O-ring is embedded on the inner wall of the first flange seat, the built-in filter 1 is arranged inside the first flange seat, the connector of the built-in filter 1 is sealed with the first flange seat through the O-ring, and the annular flange of the built-in filter 1 is located at the connection between the first flange seat and the first joint.

8. A heterogeneous catalytic reaction separation device according to claim 6, characterized in that: The liquid discharge port of the kettle body is provided with a second flange seat, and the second flange seat is detachably connected to one end of the second pipeline through a second joint; The same O-ring is embedded on the inner wall of the second flange seat, the built-in filter 2 is arranged inside the second flange seat, the connector of the built-in filter 2 is sealed with the second flange seat through the O-ring, and the annular flange of the built-in filter 2 is located at the connection between the second flange seat and the second joint.

9. A heterogeneous catalytic reaction separation device according to claim 1, characterized in that: The solid catalyst discharge port of the kettle body is provided with a third flange seat, and the third flange seat is detachably connected to one end of the third pipeline through a third joint.

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