A methanol raw material dropping device and dropping method for a reactor

Abstract

The present application relates to the technical field of reactors, and in particular to a methanol raw material dropping device and a dropping method for a reactor, which includes a reactor body with a feed pipe and a discharge pipe, a first solenoid valve is installed on the discharge pipe, a rotating drum and a driving member, a plurality of stirring blades are provided on the rotating drum, a material storage box is provided on the stirring blade, a through hole is provided at the bottom of the material storage box, an elastic plug is installed in the through hole, and a dropping port is provided on the elastic plug; a pressing plate is embedded in the material storage box along the vertical direction for sliding, and the pressing plate is connected to the stirring blade by a spring; and a pressing unit is also included, the pressing unit includes a push block and a column, and a pressing surface is provided on the push block. During the rotation of the rotating drum, the push block will press the pressing plate down through the pressing surface, and the pressing plate will squeeze the dropping material in the material storage box downward through the dropping port, and the dropping material will form a circular ring-shaped spraying area with a diameter gradually increasing from top to bottom. The present application can improve the reaction quality of the dropping material and the reaction liquid.

Description

Technical Field

[0001] The present application relates to the technical field of reactors, and in particular to a methanol raw material dropping device and a dropping method for a reactor. Background Art

[0002] Alcohols are a large class of organic compounds. They are compounds in which the hydrogen atoms in the side chains of aliphatic hydrocarbons, alicyclic hydrocarbons or aromatic hydrocarbons are replaced by hydroxyl groups. Methanol, ethanol and propanol are miscible with water in any proportion, and liquid alcohols can react chemically with many materials. In the chemical production process, methanol raw material and reaction liquid are added dropwise to the reactor, and the two materials are allowed to react evenly under the stirring action of the mixer. This method is called a dropwise reaction.

[0003] At present, the dropping device of the reactor is generally a direct delivery method, that is, the methanol raw material directly enters the reactor in a point manner, and the dropped methanol raw material will flow down in strands. Therefore, the dispersion performance of the dropping material is poor, and it is unevenly mixed with the reaction liquid in the reactor, which can easily cause local concentration to be too high, resulting in excessively fast local reaction and increased side reactions, which seriously affects product quality. Therefore, improvement is needed. Summary of the invention

[0004] In order to improve the reaction quality of the added material and the reaction liquid, the present application provides a methanol raw material drop-adding device and a drop-adding method for a reactor.

[0005] In a first aspect, the present application provides a reactor methanol raw material drop-adding device, which adopts the following technical scheme: a reactor methanol raw material drop-adding device, comprising a reactor body having a feed pipe and a discharge pipe, a first solenoid valve being installed on the discharge pipe, a rotating drum and a driving member, the rotating drum and the reactor body being coaxially arranged, and the driving member being used to drive the rotating drum to rotate;

[0006] The rotating drum is provided with a plurality of stirring blades located in the kettle body, and a material storage box is provided on the stirring blades. A through hole is provided at the bottom of the material storage box, and an elastic plug is installed in the through hole, and a drop-feeding port is provided on the elastic plug; a material pressing plate is embedded in the material storage box in a vertical sliding direction, and the material pressing plate is connected to the stirring blades through a spring;

[0007] When the spring is in a natural state, the elastic plug will not be squeezed by the dripping material in the material storage box, and the dripping port will be in a closed state;

[0008] The material pressing unit also includes a material pressing unit corresponding to the stirring blades one by one, and the material pressing unit includes a push block and a column. The push block slides along the radial direction of the rotating drum to cooperate with the stirring blades, and a downwardly inclined pressing surface is provided on the push block; the column is arranged on the material pressing plate, and the upper end of the column is located on the movement track of the pressing surface;

[0009] During the rotation of the drum, the push block will press the pressing plate through the pressing surface under the action of centrifugal force, and the pressing plate will squeeze the dripping material in the material storage box downward through the dripping port.

[0010] Optionally, at least two material storage boxes are provided on the stirring blade, the stirring blade extends radially along the rotating drum, the two material storage boxes are arranged in sequence along the extension direction of the stirring blade, and the pressing plates in the two material storage boxes on the same stirring blade are connected by a connecting plate.

[0011] Optionally, the interior of the stirring blade is hollow and connected to the interior of the drum, a feed channel and an exhaust pipe are provided on the pressing plate, the feed channel is connected to the interior of the material storage box and the interior of the stirring blade, a first one-way valve is provided in the feed channel, and the first one-way valve only allows the dripping material and air in the stirring blade to flow into the material storage box;

[0012] The exhaust pipe is connected with the interior of the material storage box and the interior of the kettle body. The exhaust pipe is provided with a second one-way valve. The second one-way valve only allows the air in the material storage box to flow into the kettle body.

[0013] Optionally, the lower part of the pressing plate is slidably embedded in the material storage box, and the upper part of the pressing plate is slidably embedded in the stirring blade;

[0014] A mounting shell is provided on the stirring blade, the push block is located in the mounting shell and is connected to the stirring blade through an elastic telescopic rod, the length direction of the elastic telescopic rod is the same as the extension direction of the stirring blade, and the upper end of the column slides in the vertical direction through the stirring blade and extends into the mounting shell.

[0015] Optionally, a discharge pipe is connected to the lower end of the drum, and a second solenoid valve is installed on the discharge pipe.

[0016] Optionally, it also includes a material storage box and a metering pump, one end of the metering pump is connected to the material storage box through a first pipeline, and the other end of the metering pump is rotatably connected to the upper end of the rotating drum through a second pipeline.

[0017] Optionally, it further includes a controller and a fluid sensor, wherein the fluid sensor and the second solenoid valve are both coupled to the controller, and the fluid sensor is installed on the second pipeline;

[0018] When the fluid sensor detects that there is fluid flowing in the second pipeline, the fluid sensor will send a closing signal to the controller, and the controller will control the second solenoid valve to close;

[0019] When the fluid sensor does not detect the flow of fluid in the second pipeline, the fluid sensor will transmit an opening signal to the controller, and the controller will control the second solenoid valve to open.

[0020] In the second aspect, the present application provides a method for dropping methanol raw material in a reactor, which adopts the following technical scheme: a method for dropping methanol raw material in a reactor, comprising the following steps:

[0021] S1, adding a certain amount of dripping material into the material storage box;

[0022] S2, adding a certain amount of reaction solution into the kettle;

[0023] S3. The drum is driven to rotate by the driving member, and the drum will drive the push block and the material storage box to rotate through the stirring blades. The push block will press the pressing plate through the pressing surface under the action of centrifugal force, and the pressing plate will squeeze the dripping material in the material storage box downward through the dripping port. Under the dual action of extrusion force and centrifugal force, the dripping material will form a circular spraying area with a diameter gradually increasing from top to bottom, and the stirring blades will stir the dripping material and the reaction liquid.

[0024] In summary, this application includes the following beneficial technical effects:

[0025] 1. During the rotation of the drum, the drum will drive the push block, the material storage box and the mounting shell to rotate through the stirring blades. The push block will press the guide surface downward through the pressure surface under the action of centrifugal force, so that the pressure plate will squeeze the dripping material in the material storage box downward through the dripping port; the dripping material will form a circular spraying area with a diameter gradually increasing from top to bottom under the dual action of extrusion force and centrifugal force. Multiple circular spraying areas will be arranged in sequence from top to bottom, and there will be at least two circular spraying areas arranged with inner and outer intervals at the same height, which greatly increases the contact area between the dripping material and the reaction liquid, thereby improving the reaction quality of the dripping material and the reaction liquid;

[0026] 2. In the dripping reaction, the worker first extracts a specified amount of dripping material through a metering pump. The extracted dripping material will enter the drum and reach a specified height. The dripping material in the drum will enter the material storage box through the inside of the stirring blade and the feed channel, so that the specified amount of dripping material is introduced into the material storage box, realizing the precise control of the dripping material dosage;

[0027] 3. When a certain amount of dripping material is stored in the material storage box, the second solenoid valve will open, and the dripping material inside the stirring blade and the rotating drum will be discharged through the discharge pipe to prevent the dripping material inside the stirring blade from entering the material storage box again during the extrusion process of the pressing plate, thereby avoiding errors in the dripping dosage of the dripping material. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0029] Figure 2 It is a schematic cross-sectional structure diagram of the overall embodiment of the present application;

[0030] Figure 3 It is a schematic cross-sectional view of the stirring blade and the rotating drum of an embodiment of the present application;

[0031] Figure 4 It is a schematic cross-sectional view of the stirring blade, the material storage box and the mounting shell of the embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of the cross-sectional structure of the interior of the stirring blade and the interior of the mounting shell in the embodiment of the present application;

[0033] Figure 6 It is a schematic cross-sectional view of the interior of the stirring blade, the interior of the mounting shell and the interior of the material storage box in the embodiment of the present application;

[0034] Figure 7 It is a schematic diagram of the structure of the bottom of the installation shell of the embodiment of the present application.

[0035] 1. Agitator body; 2. Feed pipe; 3. Discharge pipe; 4. First solenoid valve; 5. Rotating drum; 6. Stirring blade; 7. Discharge pipe; 8. Second solenoid valve; 9. Motor; 10. Storage box; 11. Through hole; 12. Elastic plug; 13. Dropping port; 14. Pressing plate; 15. Connecting plate; 16. Spring; 17. Feed channel; 18. First one-way valve; 19. Exhaust pipe; 20. Second one-way valve; 21. Pressing unit; 22. Push block; 23. Pressing surface; 24. Column; 25. Guide surface; 26. Elastic telescopic rod; 27. Mounting shell; 28. Storage box; 29. ​​Metering pump; 30. First pipeline; 31. Second pipeline; 32. Controller; 33. Fluid sensor. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-7 This application is described in further detail.

[0037] The present application embodiment discloses a methanol raw material dropping device for a reactor. Figure 1 and Figure 2 As shown, a methanol raw material dropping device for a reactor comprises a reactor body 1, the top of the reactor body 1 is connected with a feed pipe 11, the bottom of the reactor body 1 is connected with a discharge pipe 12, and a first solenoid valve 13 is installed on the discharge pipe 12.

[0038] A rotating drum 2 is rotatably connected in the kettle body 1, and the rotating drum 2 is coaxially arranged with the kettle body 1. A plurality of stirring blades 21 are arranged on the side of the rotating drum 2. A driving member is installed on the top of the kettle body 1, and the driving member is a motor 3. The output shaft of the motor 3 is connected to the rotating drum 2 through a belt drive. The motor 3 is used to drive the rotating drum 2 to rotate around its own axis, and the rotating drum 2 will drive the stirring blades 21 to rotate and stir the reaction liquid and the dripping material in the kettle body 1.

[0039] like Figure 3 and Figure 4As shown, a material storage box 4 is installed at the bottom of the stirring blade 21, and a through hole 41 is provided at the bottom of the material storage box 4. An elastic plug 42 is installed in the through hole 41, and a dripping port 43 is provided on the elastic plug 42. A material pressing plate 44 is slidably embedded in the material storage box 4 along the vertical direction, and the material pressing plate 44 is connected to the stirring blade 21 through a spring 45. When the spring 45 is in a natural state, the elastic plug 42 will not be squeezed by the dripping material in the material storage box 4. At this time, the elastic plug 42 will cause the dripping port 43 to be in a closed state due to its own elasticity, and the dripping material will be temporarily stored in the material storage box 4.

[0040] like Figure 5 and Figure 6 As shown, it also includes a pressing unit 5 corresponding to the stirring blade 21 one by one, and the pressing unit 5 includes a push block 51 and a column 52. The push block 51 slides along the radial direction of the rotating drum 2 to fit the stirring blade 21, and the push block 51 is provided with a downward inclined pressing surface 511; the column 52 is installed on the upper surface of the pressing plate 44, and the upper end of the column 52 is located on the movement trajectory of the pressing surface 511. When the motor 3 drives the drum 2 to rotate, the drum 2 will drive the push block 51 and the material storage box 4 to rotate through the stirring blades 21. The push block 51 moves away from the drum 2 under the action of centrifugal force. At this time, the push block 51 will press the pressing plate 44 through the pressing surface 511, and the pressing plate 44 will descend in the material storage box 4, thereby squeezing the dripping material in the material storage box 4 downward through the dripping port 43; under the dual action of the extrusion force and the centrifugal force, the dripping material will form an annular spraying area with a diameter gradually increasing from top to bottom, and every two adjacent stirring blades 21 are staggered up and down, thereby forming a plurality of annular spraying areas arranged in sequence from top to bottom, which greatly increases the contact area between the dripping material and the reaction liquid, thereby improving the reaction quality of the dripping material and the reaction liquid.

[0041] It is worth noting that the dropping port 43 will be in the shape of a pore when squeezed open by the dropping material, so the dropping material sprayed from the dropping port 43 will be finer and the spraying force will be stronger, making the wall thickness of the annular spraying area thinner and the height higher, thereby further increasing the contact area between the dropping material and the reaction liquid, and further improving the reaction quality of the dropping material and the reaction liquid.

[0042] At least two material storage boxes 4 are provided on the stirring blade 21, and the stirring blade 21 extends in the radial direction of the rotating drum 2. The two material storage boxes 4 are arranged in sequence along the extending direction of the stirring blade 21, and the material pressing plates 44 in the two material storage boxes 4 on the same stirring blade 21 are connected by a connecting plate 441. The setting of the connecting plate 441 enables the two material pressing plates 44 on the same stirring blade 21 to simultaneously press down the dripping material in the corresponding material storage box 4 during the rotation of the rotating drum 2 and the stirring blade 21, so that at least two annular material spraying areas arranged with inner and outer intervals are present at the same height inside the kettle body 1, thereby further improving the reaction quality of the dripping material and the reaction liquid.

[0043] like Figure 4 and Figure 5 As shown, the interior of the stirring blade 21 is hollow and connected to the interior of the drum 2, and a feed channel 46 is provided inside the pressing plate 44, and the feed channel 46 is connected to the interior of the material storage box 4 and the stirring blade 21. When the worker passes the dripping material into the interior of the drum 2, the dripping material in the drum 2 will flow into the material storage box 4 through the interior of the stirring blade 21 and the feed channel 46, thereby facilitating the addition of the dripping material in each material storage box 4.

[0044] A first one-way valve 47 is installed in the feed channel 46. The first one-way valve 47 only allows the dripping material and air in the stirring blade 21 to flow into the material storage box 4. Therefore, when the pressing plate 44 presses down the dripping material in the material storage box 4, the dripping material in the material storage box 4 will not be able to flow into the interior of the stirring blade 21 through the feed channel 46, so as to ensure that the dripping material in the material storage box 4 can be sprayed out through the dripping port 43.

[0045] An exhaust pipe 48 is installed on the pressing plate 44, and the exhaust pipe 48 is connected to the interior of the material storage box 4 and the interior of the kettle body 1. In the process that the dripping material inside the stirring blade 21 enters the interior of the material storage box 4 through the feed channel 46, the air inside the material storage box 4 can be discharged through the exhaust pipe 48, so that the air pressure inside the material storage box 4 remains balanced, so that the dripping material inside the stirring blade 21 can enter the material storage box 4.

[0046] A second one-way valve 49 is installed on the exhaust pipe 48 , and the second one-way valve 49 only allows the air in the material storage box 4 to flow into the kettle body 1 , so that the reaction liquid in the kettle body 1 cannot enter the material storage box 4 through the exhaust pipe 48 .

[0047] The lower part of the pressing plate 44 is slidably embedded in the material storage box 4, and the upper part of the pressing plate 44 is slidably embedded in the stirring blade 21, thereby completely isolating the pressing plate 44 from the kettle body 1, so that the reaction liquid in the kettle body 1 cannot enter the material storage box 4 through the gap between the pressing plate 44 and the material storage box 4, so as to ensure the reaction effect of the reaction liquid and the added material.

[0048] like Figure 6 and Figure 7As shown, the upper end of the stirring blade 21 is installed with a mounting shell 6, and the push block 51 is located in the mounting shell 6 and connected to the stirring blade 21 through an elastic telescopic rod 53. The length direction of the elastic telescopic rod 53 is the same as the extension direction of the stirring blade 21. The upper end of the column 52 is slidably arranged in the stirring blade 21 along the vertical direction and extends into the mounting shell 6, and the upper end of the column 52 is provided with an upwardly inclined guide surface 521. When the elastic telescopic rod 53 is in a natural state, the pressing surface 511 of the push block 51 will abut against the guide surface 521 of the column 52, and at this time, the push block 51 will not press down the column 52 and the pressing plate 44; during the rotation of the drum 2, the push block 51 will press down the guide surface 521 through the pressing surface 511 under the action of centrifugal force, so that the column 52 drives the pressing plate 44 to press down the dripping material in the material storage box 4, and at this time, the elastic telescopic rod 53 will be in a deformed state; when the drum 2 stops rotating, the elastic telescopic rod 53 will be in a deformed state. The rod 53 and the spring 45 will return to their natural state, the push block 51, the column 52 and the pressure plate 44 will move to reset, and the air in the stirring blade 21 will enter the storage box 4 through the feed channel 46, so that the inside of the storage box 4 returns to the normal air pressure to prevent the reaction liquid in the kettle body 1 from being sucked into the storage box 4; at the same time, due to the elastic force of the elastic plug 42 itself, the dripping port 43 is not easily pushed open by the reaction liquid in the kettle body 1, so that the reaction liquid in the kettle body 1 is not easily sucked into the storage box 4.

[0049] It is worth mentioning that the setting of the mounting shell 6 makes it difficult for the push block 51 and the column 52 to contact the reaction liquid in the kettle body 1, thereby preventing the reaction liquid in the kettle body 1 from entering the elastic telescopic rod 53, and also preventing the reaction liquid in the kettle body 1 from entering the stirring blade 21 through the gap between the column 52 and the stirring blade 21, and the mounting shell 6 can also stir the reaction liquid and the added material during the rotation process; in addition, the present application sets the upper ends of the push block 51 and the column 52 on the outside of the stirring blade 21, so that the stirring blade 21 can be set to a flat shape, and a smaller volume can be set inside the stirring blade 21, and the added material in the rotating drum 2 can more easily fill the inside of the stirring blade 21 and the inside of the material storage box 4, thereby realizing rapid feeding inside each material storage box 4.

[0050] like Figure 2 As shown, the lower end of the drum 2 is connected with a discharge pipe 22, which is located outside the kettle body 1, and a second electromagnetic valve 23 is installed on the discharge pipe 22. When the dripping material in the drum 2 is fed into the material storage box 4, the second electromagnetic valve 23 will be in a closed state; when the material storage box 4 stores a certain amount of dripping material, the second electromagnetic valve 23 will be opened, and the dripping material inside the stirring blade 21 and the drum 2 will be discharged through the discharge pipe 22, so as to prevent the dripping material inside the stirring blade 21 from entering the material storage box 4 again during the extrusion process of the pressing plate 44, thereby avoiding the error of the dripping dosage of the dripping material; the worker can set a recycling box under the discharge pipe 22 to realize the recycling of excess dripping material.

[0051] like Figure 1 and Figure 2 As shown, a material storage box 7 and a metering pump 71 are installed on the top of the kettle body 1. One end of the metering pump 71 is connected to the material storage box 7 through a first pipe 72, and the other end of the metering pump 71 is rotatably connected to the upper end of the drum 2 through a second pipe 73. The dripping material is stored in the material storage box 7, and the metering pump 71 can quantitatively extract a specified amount of the dripping material and pass the specified amount of the dripping material into the drum 2. Therefore, the worker can control the height of the dripping material in the drum 2 so that the specified amount of the material storage box 4 is passed into the dripping material. The worker can set the volume of the material storage box 4 to the required value according to actual needs. Therefore, the worker can control the dosage of the dripping material passed into the reaction liquid according to the dosage of the reaction liquid by controlling the metering pump 71 to achieve a precise ratio of the reaction liquid and the dripping material.

[0052] A controller 74 is installed on the top of the kettle body 1, and a fluid sensor 75 is installed on the second pipe 73. The fluid sensor 75 and the second solenoid valve 23 are both coupled to the controller 74. When the metering pump 71 extracts the dripping material in the storage box 7 through the first pipe 72 and passes the dripping material into the drum 2 through the second pipe 73, the fluid sensor 75 will detect that there is fluid flowing in the second pipe 73. At this time, the fluid sensor 75 will send a closing signal to the controller 74, and the controller 74 will control the second solenoid valve 23 to close, so that the dripping material in the drum 2 cannot be discharged from the discharge pipe 22, so as to ensure that the dripping material in the drum 2 can be passed into the storage box 4; when the metering pump 71 has finished pumping the material, the fluid sensor 75 will not detect that there is fluid flowing in the second pipe 73. At this time, the fluid sensor 75 will send an opening signal to the controller 74, and the controller 74 will control the second solenoid valve 23 to open, and the dripping material inside the drum 2 and the stirring blade 21 will be discharged through the discharge pipe 22.

[0053] The implementation principle of the methanol raw material dripping device for a reactor in an embodiment of the present application is as follows: in the dripping reaction, the worker first extracts a specified amount of dripping material through the metering pump 71, and the extracted dripping material will enter the rotating drum 2 and reach a specified height, and the dripping material in the rotating drum 2 will enter the material storage box 4 through the inside of the stirring blade 21 and the feed channel 46, so that a specified amount of the dripping material is introduced into the material storage box 4, thereby realizing precise control of the dosage of the dripping material.

[0054] When the metering pump 71 finishes pumping the material, the fluid sensor 75 will not detect the flow of fluid in the second pipe 73. At this time, the fluid sensor 75 will send an opening signal to the controller 74. The controller 74 will control the second solenoid valve 23 to open, and the dripping material inside the drum 2 and the stirring blade 21 will be discharged through the discharge pipe 22.

[0055] When the metering pump 71 is about to finish pumping materials, the worker can add a certain amount of reaction liquid into the kettle body 1 through the feed pipe 11, and drive the drum 2 to rotate through the motor 3. The drum 2 will drive the push block 51, the material storage box 4 and the mounting shell 6 to rotate through the stirring blade 21. The push block 51 will press the guide surface 521 downward through the pressure surface 511 under the action of centrifugal force, so that the pressure plate 44 will squeeze the dripping material in the material storage box 4 downward through the dripping port 43; the dripping material will form an annular spraying area with a diameter gradually increasing from top to bottom under the dual action of extrusion force and centrifugal force, and multiple annular spraying areas will be arranged in sequence from top to bottom, and there will be at least two annular spraying areas arranged with inner and outer intervals at the same height, which greatly increases the contact area between the dripping material and the reaction liquid, thereby improving the reaction quality of the dripping material and the reaction liquid.

[0056] The embodiment of the present application also discloses a method for adding methanol raw material to a reactor. A method for adding methanol raw material to a reactor comprises the following steps:

[0057] S1. First, a specified amount of dripping material is extracted by the metering pump 71. The extracted dripping material will enter the drum 2 and reach a specified height. The dripping material in the drum 2 will enter the material storage box 4 through the inside of the stirring blade 21 and the feed channel 46, so that a specified amount of dripping material is passed into the material storage box 4, and the excess dripping material will be discharged through the discharge pipe 22;

[0058] S2, adding a certain amount of reaction liquid into the kettle body 1 through the feed pipe 11;

[0059] S3. The motor 3 is used to drive the drum 2 to rotate. The drum 2 will drive the push block 51, the material storage box 4 and the mounting shell 6 to rotate through the stirring blade 21. The push block 51 will press the guide surface 521 downward through the pressing surface 511 under the action of centrifugal force, so that the pressing plate 44 will squeeze the dripping material in the material storage box 4 downward through the dripping port 43. The dripping material will form an annular spraying area with a diameter gradually increasing from top to bottom. Multiple annular spraying areas will be arranged in sequence from top to bottom, and there will be at least two annular spraying areas arranged with inner and outer intervals at the same height.

[0060] The present invention greatly increases the contact area between the dropwise feed and the reaction liquid, thereby improving the reaction quality of the dropwise feed and the reaction liquid.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A methanol raw material drop-adding device for a reactor, comprising a reactor body (1) having a feed pipe (11) and a discharge pipe (12), wherein a first solenoid valve (13) is installed on the discharge pipe (12), characterized in that: It also includes a rotating drum (2) and a driving member, wherein the rotating drum (2) and the kettle body (1) are arranged coaxially, and the driving member is used to drive the rotating drum (2) to rotate; The rotating drum (2) is provided with a plurality of stirring blades (21) located in the kettle body (1); the stirring blades (21) are provided with a material storage box (4); a through hole (41) is provided at the bottom of the material storage box (4); an elastic plug (42) is installed in the through hole (41); a dropping port (43) is provided on the elastic plug (42); the dropping port (43) is in the shape of a pore when opened by the dropping material; a material pressing plate (44) is slidably embedded in the material storage box (4) along the vertical direction; the material pressing plate (44) is connected to the stirring blade (21) via a spring (45); When the spring (45) is in a natural state, the elastic plug (42) will not be squeezed by the dripping material in the material storage box (4), and the dripping port (43) will be in a closed state; The material pressing unit (5) further comprises a material pressing unit (5) corresponding to the stirring blade (21) in a one-to-one manner, the material pressing unit (5) comprising a push block (51) and a column (52), the push block (51) slidingly fitting with the stirring blade (21) along the radial direction of the rotating drum (2), and a downwardly inclined pressing surface (511) being provided on the push block (51); the column (52) being provided on the material pressing plate (44), and the upper end of the column (52) being located on the movement trajectory of the pressing surface (511); During the rotation of the drum (2), the push block (51) will press the material pressing plate (44) downward through the pressing surface (511) under the action of centrifugal force, and the material pressing plate (44) will squeeze the dripping material in the material storage box (4) downward through the dripping port (43).

2. A reactor methanol raw material dropping device according to claim 1, characterized in that: At least two material storage boxes (4) are provided on the stirring blade (21); the stirring blade (21) extends radially of the rotating drum (2); the two material storage boxes (4) are arranged in sequence along the extension direction of the stirring blade (21); and the pressing plates (44) in the two material storage boxes (4) on the same stirring blade (21) are connected via a connecting plate (441).

3. A reactor methanol raw material dropping device according to claim 2, characterized in that: The interior of the stirring blade (21) is hollow and connected to the interior of the rotating drum (2); a feed channel (46) and an exhaust pipe (48) are provided on the pressing plate (44); the feed channel (46) is connected to the interior of the material storage box (4) and the interior of the stirring blade (21); a first one-way valve (47) is provided in the feed channel (46); the first one-way valve (47) only allows the dripping material and air in the stirring blade (21) to flow into the material storage box (4); The exhaust pipe (48) is connected to the interior of the material storage box (4) and the interior of the kettle body (1). The exhaust pipe (48) is provided with a second one-way valve (49). The second one-way valve (49) only allows air in the material storage box (4) to flow into the kettle body (1).

4. A reactor methanol raw material dropping device according to claim 3, characterized in that: The lower part of the pressing plate (44) is slidably embedded in the material storage box (4), and the upper part of the pressing plate (44) is slidably embedded in the stirring blade (21); A mounting shell (6) is provided on the stirring blade (21), the push block (51) is located in the mounting shell (6) and is connected to the stirring blade (21) via an elastic telescopic rod (53), the length direction of the elastic telescopic rod (53) is the same as the extension direction of the stirring blade (21), and the upper end of the column (52) is slidably arranged in the stirring blade (21) along the vertical direction and extends into the mounting shell (6).

5. A methanol raw material dropping device for a reactor according to claim 4, characterized in that: The lower end of the rotating drum (2) is connected to a discharge pipe (22), and a second solenoid valve (23) is installed on the discharge pipe (22).

6. A methanol raw material dropping device for a reactor according to claim 5, characterized in that: It also includes a material storage box (7) and a metering pump (71), one end of the metering pump (71) is connected to the material storage box (7) through a first pipe (72), and the other end of the metering pump (71) is rotatably connected to the upper end of the rotating drum (2) through a second pipe (73).

7. A methanol raw material dropping device for a reactor according to claim 6, characterized in that: It also includes a controller (74) and a fluid sensor (75), wherein the fluid sensor (75) and the second solenoid valve (23) are both coupled to the controller (74), and the fluid sensor (75) is installed on the second pipeline (73); When the fluid sensor (75) detects that fluid is flowing in the second pipe (73), the fluid sensor (75) will transmit a closing signal to the controller (74), and the controller (74) will control the second solenoid valve (23) to close; When the fluid sensor (75) does not detect the flow of fluid in the second pipe (73), the fluid sensor (75) will transmit an opening signal to the controller (74), and the controller (74) will control the second solenoid valve (23) to open.

8. A method for adding methanol raw material to a reactor according to any one of claims 1 to 7, characterized in that: The following steps are included: S1, adding a certain amount of dripping material into the material storage box (4); S2, adding a certain amount of reaction liquid into the kettle (1); S3. The rotating drum (2) is driven to rotate by the driving member. The rotating drum (2) drives the push block (51) and the material storage box (4) to rotate through the stirring blade (21). The push block (51) presses the pressing plate (44) downward through the pressing surface (511) under the action of centrifugal force. The pressing plate (44) squeezes the dripping material in the material storage box (4) downward through the dripping port (43). Under the dual action of the extrusion force and the centrifugal force, the dripping material forms a circular spraying area with a diameter gradually increasing from top to bottom. The stirring blade (21) stirs the dripping material and the reaction liquid evenly.

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