Device and method for reducing safety risks in liquid-phase oxidation reactions

Abstract

The present invention relates to the technical field of liquid-phase oxidation reactions, and in particular to a device and method for reducing safety risks in liquid-phase oxidation reactions. The device comprises a reactor having a feed port and a discharge port; a slot rack arranged in the reactor and having multiple slots for placing a catalyst; a filter plate rotatably arranged in the circumference of the slot rack, wherein the mesh of the filter plate has a blocking position for blocking the slots during rotation to control the contact area between the liquid and the catalyst; a drive assembly for transmission connection with the filter plate; and a stirring structure arranged in the reactor and used for stirring the liquid to reduce the intensity of the reaction. The present invention does not have the phenomenon of intermittent waiting, can control the phenomenon of intense reaction and intense temperature rise, and can achieve stirring while dropping the catalyst, effectively solving the technical problem in the prior art of intense local reaction and intense temperature rise in the liquid-phase oxidation reaction when stirring while dropping the catalyst.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-phase oxidation reactions, and in particular to a device and method for reducing safety risks in liquid-phase oxidation reactions. Background Art

[0002] Traditional liquid-liquid reactors generally use kettle reactors. Take a typical liquid-phase oxidation reaction as an example: first add raw materials, solvents and catalysts into the reactor, then slowly add the oxidant dropwise under stirring conditions, and the reaction heat is removed through the circulating heat transfer medium in the jacket or inner coil. However, in actual chemical reactions, the participation of the catalyst leads to violent reactions, and the catalyst cannot be in uniform contact with the reactants, which will cause this local reaction to become more intense and the temperature to rise sharply. At the same time, the heat cannot be dissipated in time, thus bringing a series of dangers.

[0003] To address the above-mentioned problems, some solutions have emerged on the market. For example, Chinese invention patent document with authorization publication number CN111533728B discloses a method for preparing vinyl sulfate. This patent involves mixing vinyl sulfite with a purity greater than 99.2% and dichloromethane, and dripping a sodium hypochlorite solution as a catalyst into the mixture. The equipment used is an oxidation kettle. After the catalyst is dripped, stirring and refining are performed. This solves the problem of intense local reactions caused by the catalyst to a certain extent. However, the catalyst is not dripped and stirred at the same time. As a result, this reaction is a batch production process, which has the problems of long reaction time and low production efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a device for reducing the safety risks in liquid-phase oxidation reactions, so as to solve the technical problems in the prior art of violent local reactions and violent temperature rises in liquid-phase oxidation reactions when the catalyst is added dropwise while stirring; the purpose of the present invention is also to provide a method for reducing the safety risks in liquid-phase oxidation reactions.

[0005] To achieve the above objectives, the device for reducing safety risks in liquid-phase oxidation reactions provided by the present invention adopts the following technical solutions:

[0006] A device for reducing safety risks in liquid-phase oxidation reactions, comprising:

[0007] The reactor has an inlet for liquid to flow in and an outlet for liquid to be discharged;

[0008] A slot rack is arranged in the reactor and has multiple slots for placing catalysts;

[0009] The filter plate is rotatably arranged in the circumference of the slot frame, and the mesh of the filter plate has a blocking position during rotation to block the slot to control the contact area between the liquid and the catalyst;

[0010] A driving assembly, drivingly connected to the filter plate, for driving the filter plate to rotate;

[0011] The stirring structure is arranged in the reactor and is used to stir the liquid to reduce the intensity of the reaction.

[0012] The device for reducing safety risks in liquid-phase oxidation reactions provided by the present invention has the following beneficial effects: the catalyst is dispersed in multiple slots, which is equivalent to changing the original local contact between the catalyst and the liquid to surface contact. The contact between the catalyst and the liquid is no longer limited to the local area that triggers a violent reaction. Instead, the contact area between the catalyst and the liquid is spread through contact at multiple locations, avoiding local violent reactions. The catalyst can be added dropwise while stirring. In addition, the advantage of providing a filter plate is that, if a reaction becomes violent, the contact area between the liquid and the catalyst can be controlled by adjusting the degree to which the filter plate blocks the slot frame, thereby allowing the liquid and the catalyst to react at a normal reaction level.

[0013] The above-mentioned dynamic adjustment process does not involve intermittent waiting, and can control the phenomena of violent reaction and drastic temperature rise, while also achieving stirring while adding the catalyst dropwise, effectively solving the technical problems in the prior art of violent local reaction and drastic temperature rise in the liquid-phase oxidation reaction when stirring while adding the catalyst dropwise.

[0014] Preferably, the drive assembly includes a track disposed outside the upper end of the reactor. The track has an air outlet communicating with the interior of the reactor and a movable rod for guided movement along the track under the propulsion of gas. The end of the movable rod, distal from the air outlet, presses against a spring mounted within the track, and the movable rod is in driving connection with the filter plate. Utilizing the gas within the reactor as the power source for the drive assembly eliminates the need for an additional power source, thereby improving the utilization rate of the gas within the reactor.

[0015] Preferably, a first rack is fixed on the outside of the moving rod, and the reactor is rotated and equipped with a rotating shaft extending up and down. The upper end of the rotating shaft extends out of the reactor and is fixed with a first gear, and the lower end extends into the reactor and is fixed with a second gear. The first gear engages with the first rack, and the filter plate is arranged with a second rack, and the second gear engages with the second rack.

[0016] Preferably, the slot frame is an annular frame having multiple rows of slots arranged in an up-and-down direction. Filter plates are provided on both the inner and outer sides of the annular frame, and the two filter plates are connected, with the feed port aligned with the gap between the outer filter plate and the inner wall of the reactor, so that the liquid passes through the outer filter plate, the slot frame, and the inner filter plate in sequence from the outside to the inside. As the liquid passes through the slot frame from the outside to the inside, it comes into more complete contact with the catalyst, thereby increasing catalyst utilization.

[0017] Preferably, a main motor is arranged on the upper side of the reactor, and the output end of the main motor extends downward and is transmission-connected to a rotary seat, which is rotatably connected to two rotary interfaces. The outer sides of the two rotary interfaces are respectively connected to an inlet pipe and an outlet pipe for coolant inflow, and the inner sides are connected to the inlet pipe and the outlet pipe through a connecting pipe. The ends of the inlet pipe and the outlet pipe facing away from the rotary interface are both connected to a cooling box. The connecting pipe is used to stir and cool the liquid in the reaction when rotating with the main motor. The connecting pipe constitutes the stirring structure. Stirring is achieved while cooling and cooling, which has a better cooling effect.

[0018] Preferably, the connecting pipe is arranged in a spiral shape, which increases the contact area with the liquid and improves the cooling effect.

[0019] Preferably, the reactor is further provided with a fastening frame, on which a pre-feed tank is disposed. The pre-feed tank has a feed pipe at its upper end and a discharge pipe at its lower end connected to the feed inlet. Switches consisting of notched rotary valves are disposed on both the feed pipe and the discharge pipe. The two switches are connected by a transmission rod and are staggered so that one switch is closed when the other is open, thereby achieving quantitative feeding of the reactor. The fastening frame is provided with a control motor for driving the transmission rod to rotate. This enables quantitative feeding and better control of the reaction.

[0020] Preferably, the fastening frame has three pre-feed tanks arranged in a ring shape, the reactor is correspondingly provided with three feed ports, and the output end of the control motor simultaneously drives the transmission rods connected to the three pre-feed tanks through a transmission belt.

[0021] Preferably, the reactor also includes an exhaust gas treatment device, which is connected to the interior of the reactor via an air duct. The air duct is equipped with a pressure valve for controlling the air pressure within the reactor, determining whether to open the air duct to allow gas to flow into the exhaust gas treatment device. When the reaction is proceeding within the reactor, the pressure valve is closed, which does not affect the flow of gas from the outlet to drive the moving rod. When the pressure within the reactor is excessive, the pressure valve is opened to better control the pressure within the reactor.

[0022] To achieve the above objectives, the method for reducing safety risks in a liquid-phase oxidation reaction provided by the present invention adopts the following technical solutions:

[0023] A method for reducing safety risks in a liquid-phase oxidation reaction comprises the following steps:

[0024] Control the pre-feed tank to open and quantitatively add the amount of liquid required for reaction;

[0025] Control the pre-feed tank to be connected to the reactor, and add the liquid into the reactor;

[0026] The filter plate first moves to the position where the liquid can contact the catalyst on the card slot, so that the liquid and the catalyst contact and react. At the same time, the main motor and the cooling box work, and the coolant enters the connecting pipe to cool the liquid reaction;

[0027] When the liquid and the catalyst react violently, the gas generated in the reactor enters the track through the gas outlet, pushing the moving rod to move, thereby causing the filter plate to rotate to control the contact area between the liquid and the catalyst to become smaller, thereby reducing the intensity of the reaction between the liquid and the catalyst;

[0028] The exhaust gas treatment equipment is opened when the gas in the reactor exceeds the set value, so that the gas flows into the exhaust gas treatment equipment through the air guide pipe;

[0029] After the reaction is completed, open the discharge port to discharge the liquid after the reaction.

[0030] The method for reducing safety risks in liquid-phase oxidation reactions provided by the present invention has the following beneficial effects: the catalyst is dispersed in multiple slots, which is equivalent to changing the original local contact between the catalyst and the liquid to surface contact. The contact between the catalyst and the liquid is no longer limited to the local area that triggers a violent reaction. Instead, the contact area between the two is spread through contact at multiple locations, avoiding local violent reactions. The catalyst can be added dropwise while stirring. In addition, the advantage of providing a filter plate is that, if a reaction becomes violent, the contact area between the liquid and the catalyst can be controlled by adjusting the degree to which the filter plate blocks the slot frame, thereby allowing the liquid and the catalyst to react at a normal reaction level.

[0031] The above-mentioned dynamic adjustment process does not involve intermittent waiting, and can control the phenomena of violent reaction and drastic temperature rise, while also achieving stirring while adding the catalyst dropwise, effectively solving the technical problems in the prior art of violent local reaction and drastic temperature rise in the liquid-phase oxidation reaction when stirring while adding the catalyst dropwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0033] Figure 1 This is an overall schematic diagram of a device for reducing safety risks in a liquid-phase oxidation reaction provided by the present invention;

[0034] Figure 2 This is a partial cross-sectional view of the present invention Figure 1 ;

[0035] Figure 3 yes Figure 2 A magnified schematic diagram of point A in the middle;

[0036] Figure 4 This is a partial cross-sectional view of the present invention Figure 2 ;

[0037] Figure 5 It is a partial schematic diagram of the interior of the present invention;

[0038] Figure 6 yes Figure 5 A magnified schematic diagram of point B in the middle;

[0039] Figure 7 It is a partial schematic diagram of the exterior of the present invention;

[0040] Figure 8 It is a schematic diagram of the assembly of the fastening frame and the pre-feed tank in the present invention.

[0041] Numbers in the figure: 1. Reactor; 2. Feed pipe; 3. Discharge pipe; 4. Slot rack; 41. Slot; 5. Filter plate; 6. Track; 7. Air outlet; 8. Moving rod; 9. Spring; 10. First rack; 11. Rotating shaft; 12. First gear; 13. Second gear; 14. Second rack; 15. Main motor; 16. Rotating seat; 17. Rotating interface; 18. Liquid inlet pipe; 19. Liquid outlet pipe; 20. Connecting pipe; 21. Cooling box; 22. Fastening rack; 23. Pre-feed tank; 24. Feed pipe; 25. Discharge pipe; 26. Transmission rod; 27. Control motor; 28. Transmission belt; 29. ​​Waste gas treatment equipment; 30. Air duct; 31. Switch. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0043] Specific embodiments of the device for reducing safety risks in liquid-phase oxidation reactions provided by the present invention include:

[0044] like Figure 1 As shown, a device for reducing safety risks in liquid-phase oxidation reactions comprises: a reactor 1 having an inlet for liquid inflow and an outlet for liquid discharge, wherein the inlet is connected to an inlet pipe 2 and the outlet is connected to a discharge pipe 3; a slot rack 4 arranged in the reactor 1 and having a plurality of slots 41 for placing catalysts; a filter plate 5 rotatably arranged in the circumference of the slot rack 4, the mesh of the filter plate 5 having a blocking position for blocking the slots 41 during rotation to control the contact area between the liquid and the catalyst; a drive assembly, transmission-connected to the filter plate 5, for driving the filter plate 5 to rotate; a stirring structure arranged in the reactor 1, for stirring the liquid to reduce the intensity of the reaction.

[0045] like Figure 2 and Figure 3 As shown, the drive assembly includes a track 6, which is arranged on the outer side of the upper end of the reactor 1. The track 6 has an outlet 7 connected to the interior of the reactor 1 and a moving rod 8 for guiding and moving along the track 6 under the push of gas. The end of the moving rod 8 away from the outlet 7 is pressed against a spring 9 installed in the track 6, and the moving rod 8 is connected to the filter plate 5 in a transmission manner. By using the gas in the reactor 1 as the power source in the drive assembly, there is no need to set up an additional power source, thereby improving the utilization rate of the gas in the reactor 1. In other embodiments, a separate power source can also be provided to drive the moving rod to rotate.

[0046] A first rack 10 is fixed to the outside of the moving rod 8, and the reactor 1 is rotatably equipped with a rotating shaft 11 extending up and down. The upper end of the rotating shaft 11 extends out of the reactor 1 and is fixed with a first gear 12, and the lower end extends into the reactor 1 and is fixed with a second gear 13. The first gear 12 engages with the first rack 10, and the filter plate 5 is arranged with a second rack 14, and the second gear 13 engages with the second rack 14.

[0047] like Figure 2 and Figure 4 As shown, the slot rack 4 is an annular rack having multiple rows of slots 41 arranged in the vertical direction; filter plates 5 are provided on both the inner and outer sides of the annular rack, and the two filter plates 5 are connected, and the connection is located at the upper end of the slot rack 4 to avoid interference with the slot rack 4, and the feed port is aligned with the gap between the outer filter plate 5 and the inner wall of the reactor 1, so that the liquid passes through the outer filter plate 5, the slot rack 4 and the inner filter plate 5 in sequence from the outside to the inside. The liquid passes through the slot rack 4 from the outside to the inside, and the contact with the catalyst is more sufficient, and the utilization rate of the catalyst is higher. In other embodiments, the filter plate can also be only one layer. In this case, the filter plate is arranged on the inner side of the slot rack, and the feed port is aligned with the inner side of the filter plate. The filter plate controls whether the inner liquid contacts the catalyst on the slot rack located outside the filter plate.

[0048] In order to facilitate the installation of the filter plate 5, the reactor 1 also has a track slot located on the upper and lower sides of the filter plate 5. The track slot has two inner and outer guide rails, which respectively guide the installation of the inner filter plate 5 and the outer filter plate 5. The track slot also has a fixing position located between the two guide rails to fix the slot frame 4.

[0049] During the specific installation, first clamp the two filter plates 5 on the inner and outer sides of the slot frame 4, fix the two filter plates 5 and the slot frame 4 to the track slot, and then fix the track slot to the inside of the reactor 1.

[0050] like Figures 5 to 7 As shown, the upper side of the reactor 1 is provided with a main motor 15, the output end of the main motor 15 extends downward and is transmission-connected to a rotary seat 16, and two rotary interfaces 17 are rotatably connected to the rotary seat 16. The outer sides of the two rotary interfaces 17 are respectively connected to an inlet pipe 18 for the coolant to flow in and an outlet pipe 19 for the coolant to flow out. The inner sides are connected by a connecting pipe 20. The ends of the inlet pipe 18 and the outlet pipe 19 facing away from the rotary interface 17 are both connected to a cooling box 21. The connecting pipe 20 is used to stir and cool the liquid in the reaction when rotating with the main motor 15. The connecting pipe 20 constitutes the stirring structure. Stirring is achieved while cooling and cooling, and the cooling effect is better.

[0051] Specifically, if Figure 7 As shown, the output end of the main motor 15 is connected to a rotating rod through a gear transmission. The rotating rod extends into the reactor 1 and is fixedly connected to the rotating seat 16.

[0052] like Figure 5 As shown, the connecting pipe 20 is arranged in a spiral shape, which has a larger contact area with the liquid and a better cooling effect.

[0053] like Figure 8 As shown, the reactor 1 is further provided with a fastening frame 22, on which a pre-feed tank 23 is arranged. The pre-feed tank 23 has a feed pipe 24 at its upper end and a discharge pipe 25 at its lower end that communicates with the feed port. A switch 31 consisting of a notch-type rotary valve is arranged at each of the feed pipe 24 and the discharge pipe 25. The two switches 31 are connected by a transmission rod 26. The two switches 31 are staggered so that one switch 31 is closed when the other is open, thereby achieving quantitative feeding to the reactor 1. The fastening frame 22 is provided with a control motor 27 for driving the transmission rod 26 to rotate. This enables quantitative feeding and better control of the reaction.

[0054] The fastening frame 22 has three pre-feed tanks 23 arranged in a ring, and the reactor 1 is correspondingly provided with three feed ports. The output end of the control motor 27 simultaneously drives the transmission rods 26 connected to the three pre-feed tanks 23 through a transmission belt 28. The advantage of the three pre-feed tanks 23 arranged in a ring is that liquid can enter the reactor 1 from multiple directions to avoid accumulation. In other embodiments, the number of pre-feed tanks can also be adjusted according to actual needs, for example, it can also be one or two.

[0055] like Figure 1 As shown, the reactor 1 also includes an exhaust gas treatment device 29, which is connected to the interior of the reactor 1 via an air duct 30. A pressure valve is disposed on the air duct 30 to control the air pressure within the reactor 1. The valve determines whether to open the air duct 30 to allow gas to flow into the exhaust gas treatment device 29. When a reaction is taking place within the reactor 1, the pressure valve is closed, which does not affect the flow of gas from the gas outlet 7 to move the moving rod 8. When the pressure within the reactor 1 is too high, the pressure valve is opened to better control the pressure within the reactor 1.

[0056] The device for reducing safety risks in liquid-phase oxidation reactions provided by the present invention has the following beneficial effects: the catalyst is dispersed in the plurality of slots 41, which is equivalent to changing the original local contact between the catalyst and the liquid to surface contact. The contact between the catalyst and the liquid is no longer limited to the local area that triggers a violent reaction. Instead, the contact area between the catalyst and the liquid is spread through contact at multiple locations, thereby avoiding local violent reactions and allowing the catalyst to be added dropwise while stirring. In addition, the provision of the filter plate 5 has the advantage that, once a violent reaction occurs, the contact area between the liquid and the catalyst can be controlled by adjusting the degree to which the filter plate 5 blocks the slot frame 4, thereby allowing the liquid and the catalyst to react at a normal reaction level.

[0057] The above-mentioned dynamic adjustment process does not involve intermittent waiting, and can control the phenomena of violent reaction and drastic temperature rise, while also achieving stirring while adding the catalyst dropwise, effectively solving the technical problems in the prior art of violent local reaction and drastic temperature rise in the liquid-phase oxidation reaction when stirring while adding the catalyst dropwise.

[0058] A specific embodiment of the method for reducing safety risks in a liquid-phase oxidation reaction provided by the present invention: The method for reducing safety risks in a liquid-phase oxidation reaction is mainly implemented by means of the above-mentioned device for reducing safety risks in a liquid-phase oxidation reaction, comprising the following steps:

[0059] Control the pre-feed tank 23 to open and quantitatively add the amount of liquid that needs to react;

[0060] Control the pre-feed tank 23 to be connected to the reactor 1, and add the liquid into the reactor 1;

[0061] The filter plate 5 first moves to a position where the liquid can contact the catalyst on the card slot 41, so that the liquid and the catalyst contact and react. At the same time, the main motor 15 and the cooling box 21 work, and the coolant enters the connecting pipe 20 to cool the liquid reaction;

[0062] When the liquid and the catalyst react violently, the gas generated in the reactor 1 enters the track 6 through the gas outlet 7, pushing the moving rod 8 to move, thereby causing the filter plate 5 to rotate to control the contact area between the liquid and the catalyst to become smaller, thereby reducing the intensity of the reaction between the liquid and the catalyst;

[0063] The exhaust gas treatment device 29 is opened when the gas in the reactor 1 exceeds a set value, so that the gas flows into the exhaust gas treatment device 29 through the air guide pipe 30;

[0064] After the reaction is completed, open the discharge port to discharge the liquid after the reaction.

[0065] In the present invention, unless otherwise clearly specified and limited, terms such as "install", "connect", "connect", and "fix" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly specified and limited, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0066] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for reducing safety risks in liquid-phase oxidation reactions, characterized in that: include: The reactor has an inlet for liquid to flow in and an outlet for liquid to be discharged; A slot rack is arranged in the reactor and has multiple slots for placing catalysts; The filter plate is rotatably arranged in the circumference of the slot frame, and the mesh of the filter plate has a blocking position during rotation to block the slot to control the contact area between the liquid and the catalyst; a drive assembly, drivingly connected to the filter plate and used to drive the filter plate to rotate; the drive assembly includes a track, which is arranged on the outer side of the upper end of the reactor, and has an outlet connected to the interior of the reactor and a moving rod for guiding movement along the track under the propulsion of gas, the end of the moving rod away from the outlet pressing against a spring installed in the track, and the moving rod drivingly connected to the filter plate; The stirring structure is arranged in the reactor and is used to stir the liquid to reduce the intensity of the reaction.

2. The device for reducing safety risks in liquid-phase oxidation reaction according to claim 1, characterized in that: A first rack is fixed on the outside of the moving rod, and the reactor is rotated and equipped with a rotating shaft extending up and down. The upper end of the rotating shaft extends out of the reactor and is fixed with a first gear, and the lower end extends into the reactor and is fixed with a second gear. The first gear engages with the first rack, and the filter plate is arranged with a second rack, and the second gear engages with the second rack.

3. The device for reducing safety risks in liquid-phase oxidation reaction according to any one of claims 1 to 2, characterized in that: The slot rack is an annular rack having multiple rows of slots arranged in the up-down direction; filter plates are provided on both the inner and outer sides of the annular rack, and the two filter plates are connected, with the feed port aligned with the gap between the outer filter plate and the inner wall of the reactor, so that the liquid passes through the outer filter plate, the slot rack and the inner filter plate in sequence from the outside to the inside.

4. The device for reducing safety risks in liquid-phase oxidation reaction according to any one of claims 1 to 2, characterized in that: A main motor is arranged on the upper side of the reactor, and the output end of the main motor extends downward and is transmission-connected to a rotary seat, and two rotary interfaces are rotatably connected to the rotary seat. The outer sides of the two rotary interfaces are respectively connected to an inlet pipe and an outlet pipe for coolant to flow in, and the inner sides are connected to the inlet pipe and the outlet pipe through a connecting pipe. The ends of the inlet pipe and the outlet pipe facing away from the rotary interface are both introduced into a cooling box. The connecting pipe is used to stir and cool the liquid in the reaction when rotating with the main motor, and the connecting pipe constitutes the stirring structure.

5. The device for reducing safety risks in liquid-phase oxidation reaction according to claim 4, characterized in that: The connecting pipes are arranged in a spiral shape.

6. The device for reducing safety risks in liquid-phase oxidation reaction according to any one of claims 1 to 2, characterized in that: The reactor is also provided with a fastening frame, on which a pre-feed tank is provided. The upper end of the pre-feed tank is provided with a feed pipe, and the lower end is provided with a discharge pipe connected to the feed port. Switches consisting of notch-type rotary valves are provided at both the feed pipe and the discharge pipe. The two switches are connected by a transmission rod. The two switches are staggered so that one switch is closed when the other switch is open, thereby achieving quantitative feeding to the reactor. A control motor for driving the transmission rod to rotate is provided on the fastening frame.

7. The device for reducing safety risks in liquid-phase oxidation reaction according to claim 6, characterized in that: The fastening frame is provided with three pre-feeding tanks arranged in a ring shape, and the reactor is correspondingly provided with three feeding ports. The output end of the control motor is simultaneously driven by a transmission belt to connect the transmission rods of the three pre-feeding tanks.

8. The device for reducing safety risks in liquid-phase oxidation reaction according to any one of claims 1 to 2, characterized in that: It also includes waste gas treatment equipment, which is connected to the interior of the reactor through an air duct. The air duct is provided with a pressure valve for controlling the air pressure in the reactor to determine whether to open the air duct to supply gas to the waste gas treatment equipment.

9. A method for reducing safety risks in a liquid phase oxidation reaction, characterized in that: The device for reducing safety risks in a liquid-phase oxidation reaction according to any one of claims 1 to 8 comprises the following steps: Control the pre-feed tank to open and quantitatively add the amount of liquid required for reaction; Control the pre-feed tank to be connected to the reactor, and add the liquid into the reactor; The filter plate first moves to the position where the liquid can contact the catalyst on the card slot, so that the liquid and the catalyst contact and react. At the same time, the main motor and the cooling box work, and the coolant enters the connecting pipe to cool the liquid reaction; When the liquid and the catalyst react violently, the gas generated in the reactor enters the track through the gas outlet, pushing the moving rod to move, thereby causing the filter plate to rotate to control the contact area between the liquid and the catalyst to become smaller, thereby reducing the intensity of the reaction between the liquid and the catalyst; The exhaust gas treatment equipment is opened when the gas in the reactor exceeds the set value, so that the gas flows into the exhaust gas treatment equipment through the air duct; After the reaction is completed, open the discharge port to discharge the liquid after the reaction.

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