Device and method for preparing organic compound

Abstract

The present invention relates to the field of chemical industry, specifically to an organic compound preparation device and method, which includes: a jet flow tube, the jet flow tube is rotatably connected with a liquid inlet pipe, a plurality of jet tubes are arranged on the jet flow tube, and the bottom of the jet flow tube is connected with the output end of a gas-liquid mixing pump through a rotary joint; a power mechanism, arranged at the bottom of a bubbling tower, used to drive the jet flow tube to continuously rotate forward and reverse at a set angle; and an inner diameter changing member, arranged on the inner wall of the jet flow tube, the liquid flow diameter in the middle of the inner diameter changing member is the smallest, and a top reflux pipe is arranged in the middle of the inner diameter changing member. In the present invention, gas-liquid mixing is improved by various means, thereby improving the reaction effect; and the gas raw material that has not completely reacted in the bubbling tower floats up, and will be re-sucked into the jet flow tube under the suction of the swinging top reflux pipe, and then ejected through the guide pipe after the reaction, preventing the unreacted gas from being directly discharged through the exhaust pipe, thereby improving the overall yield.

Description

Technical Field

[0001] The present invention relates to the field of chemical technology, and in particular to an organic compound preparation device and method. Background Art

[0002] 2-Methylpyridine is an organic compound, a derivative of pyridine, and a colorless to pale yellow liquid. 2-Methylpyridine is mainly used to synthesize various chemicals, including pesticides, medicines, fuels, pigments, etc. In industrial production, 2-methylpyridine is usually prepared by catalytic hydrogenation or other chemical synthesis methods, and the commonly used preparation device is a bubble column reactor.

[0003] The Chinese patent with the announcement number CN209020391U discloses a bubbling tower reactor, comprising: a tower body and a gas-liquid mixing pump; the tower body comprises a buffer chamber for buffering in gas and liquid reactions, a mixing chamber and a liquid absorption chamber for material mixing reactions; a gas distributor is horizontally installed in the liquid absorption chamber to bubble and blow an external reaction gas source into the tower; the buffer chamber, the mixing chamber and the liquid absorption chamber are connected in sequence from top to bottom; the gas-liquid mixing pump comprises a first inlet, a second inlet and a mixed liquid outlet; the gas-liquid mixing pump is connected to the external reaction gas source through the first inlet; the gas-liquid mixing pump is connected to the liquid absorption chamber through the second inlet; the gas-liquid mixing pump is connected to the mixing chamber through the mixed liquid outlet. It has the advantages of high gas-liquid solid dissolution efficiency, uniform mixing, stable performance, easy operation and maintenance, and effectively suppresses the back-mixing problem in the reaction process, greatly improving production efficiency.

[0004] However, the above-mentioned disclosed scheme has the following shortcomings: the gas-liquid mixing pump can only pump the gas-liquid mixture into the tower body for mixing reaction, but the gas floats during the reaction, and the incompletely reacted gas will be directly discharged through the tail gas outlet at the top, resulting in waste of gas raw materials and reduced yield. Summary of the invention

[0005] The purpose of the present invention is to propose an organic compound preparation device and method to solve the problem that unreacted gas raw materials are directly discharged in the background technology, resulting in a waste of raw materials and a reduction in yield.

[0006] In one aspect, the present invention provides an organic compound preparation device, comprising a bubbling tower, wherein an exhaust pipe is arranged at the top of the bubbling tower, and a liquid inlet pipe and a discharge pipe are arranged at the bottom; and further comprising:

[0007] The jet flow pipe is inserted into the bubbling tower from the bottom of the bubbling tower, the jet flow pipe is rotatably connected to the liquid inlet pipe, a plurality of jet pipes are arranged on the jet flow pipe, and the bottom of the jet flow pipe is connected to the output end of the gas-liquid mixing pump through a rotary joint;

[0008] The power mechanism is arranged at the bottom of the bubble tower and is used to drive the jet flow tube to rotate forward and reverse continuously at a set angle;

[0009] An inner diameter changing member is arranged on the inner wall of the jet flow pipe, the liquid flow diameter is smallest in the middle of the inner diameter changing member, and the liquid flow diameter gradually increases in the process of moving away from the middle to the upper and lower sides, and a top return pipe is arranged in the middle of the inner diameter changing member;

[0010] And a control system, which is connected with the power mechanism control.

[0011] Preferably, a barrel wall jacket is provided on the outer wall of the bubbling tower, liquid flows in the barrel wall jacket, and the circulating liquid is used to control the reaction temperature in the bubbling tower. A temperature-controlled liquid inlet pipe and a temperature-controlled liquid outlet pipe are provided on the barrel wall jacket.

[0012] Preferably, the power mechanism includes a mounting base arranged at the bottom of the bubbling tower, an encoder motor arranged on the mounting base, a driving gear arranged on the output shaft of the encoder motor, and a driven gear arranged on the outer wall of the bottom of the jet flow tube, and the driven gear is meshed with the driving gear.

[0013] Preferably, a guide pipe is arranged at the top of the jet flow tube, and the guide pipe is an inverted U-shaped structure. The guide pipe guides the liquid at the top of the jet flow tube downward and sprays it toward the inner wall of the bubbling tower; a liquid replenishment pipe is arranged in the middle of the bubbling tower, and the liquid replenishment pipe is located at the discharge port of the guide pipe.

[0014] Preferably, two inner diameter changing members are arranged side by side, and a bottom reflux pipe is arranged at the middle position of the lower inner diameter changing member, and the bottom reflux pipe extends into the bubbling tower.

[0015] Preferably, a protective cover is provided on the inner diameter changing member, and a pressure difference sensor is provided inside the protective cover. The pressure difference sensor is used to detect the pressure difference at different positions in the inner diameter changing member, so as to convert the liquid flow rate at the middle position of the inner diameter changing member through the control system.

[0016] Preferably, the following parameters are defined: the throat diameter of the inner diameter changing member , the inlet diameter of the inner diameter changing part , outlet diameter of the inner diameter changing part , fluid density , gas density , the fluid density of the gas-liquid mixture , fluid viscosity , the liquid flow rate sucked by the jet flow tube , the fluid flow rate in the jet tube , the fluid flow rate at the bottom inlet of the jet tube , throat velocity of the inner diameter changer , equivalent height of the suction liquid , throat velocity The calculation formula is as follows: , where It is the pressure difference between the throat of the inner diameter changing member and the inlet.

[0017] Preferably, Calculated by the following formula: , where g is the acceleration due to gravity.

[0018] On the other hand, the present invention provides a method for preparing an organic compound, comprising the following steps: S1, obtaining a throat flow velocity according to calculation S2, the gas-liquid mixture is input into the jet flow tube through the gas-liquid mixing pump, and the mother liquid containing the catalyst is input into the bubbling tower through the liquid replenishment tube; S3, according to The calculated value is combined with the measured value of the differential pressure sensor to adjust the output flow rate of the gas-liquid mixing pump. The actual value is equal to the calculated value; S4, the gas and liquid are fully mixed and reacted in the jet flow tube and the bubble tower; S5, the waste gas is discharged from the exhaust pipe at the top, and the finished product and mother liquor are discharged from the discharge pipe.

[0019] Compared with the prior art, the present invention has the following beneficial technical effects:

[0020] 1. The gas-liquid mixture is input into the jet flow tube through the gas-liquid mixing pump. The gas and liquid are initially mixed and reacted in the gas-liquid mixing pump, and continue to mix and react after entering the jet flow tube. The jet tube sprays the gas-liquid mixture into the bubbling tower for mixing reaction again, which improves the mixing reaction effect of the gas and liquid;

[0021] 2. At the throat of the inner diameter changing part, due to the Venturi effect, part of the gas-liquid mixture is sucked back into the jet flow tube by the bottom return pipe and mixed with the fluid in the jet flow tube again, forming a mixed reaction;

[0022] 3. In addition, the gas-liquid mixture sprayed out of the draft tube and the mother liquor containing the catalyst sprayed out of the liquid replenishment tube will be mixed again, which can fully mix and react the unreacted gas in the jet flow tube with the catalyst mother liquor. The gas raw material that has not completely reacted in the bubbling tower will float up and will be re-sucked into the jet flow tube under the suction of the swinging top reflux pipe. After the reaction, it will be sprayed out through the draft tube, preventing the unreacted gas from being directly discharged through the exhaust pipe, thereby improving the overall yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of an embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of a bubble tower;

[0025] Figure 3 Schematic diagram of the internal structure of the bubble tower;

[0026] Figure 4is a schematic diagram of the internal structure of the jet flow tube;

[0027] Figure 5 for Figure 4 Schematic diagram of part of the structure.

[0028] Figure numerals: 1. Bubble tower; 2. Cylinder wall jacket; 3. Temperature-controlled liquid inlet pipe; 4. Temperature-controlled liquid outlet pipe; 5. Exhaust pipe; 6. Liquid inlet pipe; 7. Liquid replenishment pipe; 8. Jet flow pipe; 9. Rotary joint; 10. Mounting seat; 11. Encoder motor; 12. Driving gear; 13. Driven gear; 14. Guide pipe; 15. Jet pipe; 16. Bottom reflux pipe; 17. Top reflux pipe; 18. Inner diameter changing part; 19. Protective cover; 20. Pressure difference sensor; 21. Wiring pipe. DETAILED DESCRIPTION

[0029] Embodiment 1, as Figure 1-Figure 4 As shown, an organic compound preparation device proposed by the present invention comprises a bubbling tower 1, a vent pipe 5 is arranged at the top of the bubbling tower 1, a liquid inlet pipe 6 and a discharge pipe are arranged at the bottom, and the discharge pipe is not drawn in the figure; and further comprises:

[0030] The jet flow tube 8 is inserted into the bubbling tower 1 from the bottom of the bubbling tower 1, and the jet flow tube 8 is rotatably connected with the liquid inlet pipe 6. Specifically, a rotary sealing bearing is arranged between the jet flow tube 8 and the liquid inlet pipe 6, and a plurality of jet pipes 15 are arranged on the jet flow tube 8. The bottom of the jet flow tube 8 is connected to the output end of the gas-liquid mixing pump through a rotary joint 9. The gas-liquid mixing pump mixes the gas and liquid required for the reaction and pumps them into the jet flow tube 8, and sprays them through the plurality of jet pipes 15 located in the bubbling tower 1. The gas-liquid mixing pump preliminarily mixes the gas and liquid, performs a mixing reaction in the jet flow tube 8, and after spraying through the jet pipe 15, performs a mixing reaction in the bubbling tower 1, and has a good reaction effect;

[0031] The power mechanism is arranged at the bottom of the bubble tower 1, and is used to drive the jet flow tube 8 to continuously rotate forward and reverse at a set angle. In this embodiment, the set angle is 30 degrees; the power mechanism includes a mounting seat 10 arranged at the bottom of the bubble tower 1, an encoder motor 11 arranged on the mounting seat 10, a driving gear 12 arranged on the output shaft of the encoder motor 11, and a driven gear 13 arranged on the outer wall of the bottom of the jet flow tube 8, and the driven gear 13 is meshed with the driving gear 12; in this embodiment, the speed of the driving gear 12 is greater than the speed of the driven gear 13, that is, the diameter of the driving gear 12 is smaller than the diameter of the driven gear 13, and in addition, the control system is connected to the encoder motor 11 to control the encoder motor 11 to continuously rotate forward and reverse, and the maximum rotation angle is 30 degrees;

[0032] The inner diameter changing member 18 is arranged on the inner wall of the jet flow tube 8. The liquid flow diameter in the middle of the inner diameter changing member 18 is the smallest, and the liquid flow diameter gradually increases in the process of moving away from the middle to the upper and lower sides. The top reflux pipe 17 is arranged in the middle of the inner diameter changing member 18. The reduced inner diameter structure forms a Venturi effect. The pressure of the inner diameter changing member 18 is reduced in the middle, so that the liquid in the bubbling tower 1 is sucked into the jet flow tube 8 through the top reflux pipe 17 to further perform a mixing reaction. In this embodiment, the top reflux pipe 17 is close to the top of the jet flow tube 8. The top reflux pipe 17 helps to suck the unreacted gas raw material into the jet flow tube 8 to react with the catalyst, thereby preventing the unreacted gas from being directly discharged through the exhaust pipe 5.

[0033] And a control system, the control system is connected to the power mechanism control, and the control system controls the operation of the power mechanism.

[0034] Embodiment 2, as Figure 1 As shown, an organic compound preparation device proposed by the present invention, compared with the first embodiment, this embodiment introduces the structure of the bubbling tower 1 in detail.

[0035] A barrel wall jacket 2 is arranged on the outer wall of the bubbling tower 1, and liquid flows in the barrel wall jacket 2. The circulating liquid is used to control the reaction temperature in the bubbling tower 1. A temperature-controlled liquid inlet pipe 3 and a temperature-controlled liquid outlet pipe 4 are arranged on the barrel wall jacket 2; in an optional embodiment, two barrel wall jackets 2 are arranged side by side, the temperature-controlled liquid inlet pipe 3 is located at the bottom of the barrel wall jacket 2, and the temperature-controlled liquid outlet pipe 4 is located at the top of the barrel wall jacket 2. In this embodiment, the temperature of the liquid in the barrel wall jacket 2 is controlled at 160 degrees. Under the action of the catalyst, acetylene and acetonitrile gases react rapidly and release heat, driving the temperature of the entire system, so that the acetylene and acetonitrile gases that do not contact the barrel wall to obtain heat also react under the action of the catalyst, thereby the entire system is formed by reaction.

[0036] Embodiment three, as Figure 3 As shown, an organic compound preparation device proposed by the present invention, compared with the first embodiment, this embodiment introduces the structure of the guide tube 14 in detail.

[0037] A guide tube 14 is arranged on the top of the jet flow tube 8, and the guide tube 14 is an inverted U-shaped structure. The guide tube 14 guides the liquid on the top of the jet flow tube 8 downward and sprays it toward the inner wall of the bubbling tower 1; a liquid replenishing tube 7 is arranged in the middle of the bubbling tower 1, and the liquid replenishing tube 7 is located at the discharge port of the guide tube 14. The liquid replenishing tube 7 replenishes the mother liquid and catalyst required for the reaction into the bubbling tower 1. The mother liquid is an organic solvent, which is selected according to the production requirements of the reagent. The liquid replenishing tube 7 is located at the height of the discharge port at the bottom of the guide tube 14, so as to facilitate the further mixing of the liquid sprayed from the liquid replenishing tube 7 and the liquid sprayed from the guide tube 14, thereby improving the reaction effect.

[0038] Embodiment 4, as Figure 4-Figure 5As shown, an organic compound preparation device proposed by the present invention, compared with the third embodiment, this embodiment introduces in detail how to determine the flow rate at the throat of the inner diameter changing member 18.

[0039] Two inner diameter changing members 18 are arranged side by side, and a bottom reflux pipe 16 is arranged at the middle position of the lower inner diameter changing member 18. The bottom reflux pipe 16 extends into the bubbling tower 1. The main function of the bottom reflux pipe 16 is to suck the gas-liquid mixture into the jet flow tube 8 for re-mixing reaction.

[0040] A protective cover 19 is provided on the inner diameter changing part 18 at the top, and a pressure difference sensor 20 is provided inside the protective cover 19. The pressure difference sensor 20 is used to detect the pressure difference at different positions inside the inner diameter changing part 18, so as to convert the liquid flow rate at the middle position of the inner diameter changing part 18 through the control system; in order to facilitate wiring, a wiring tube 21 is provided at the bottom of the protective cover 19, and the wiring tube 21 extends downward and finally passes horizontally through the bottom of the jet flow tube 8. The control system is electrically connected to the pressure difference sensor 20, which not only supplies power to the pressure difference sensor 20, but also transmits data with the pressure difference sensor 20.

[0041] The flow rate in the jet flow tube 8 cannot be too low or too high. If the flow rate is too high, the residence time of the gas-liquid mixture in the jet flow tube 8 will be too short, affecting the full progress of the reaction. Although a high flow rate will increase turbulence, it may also cause uneven distribution of reactants, local overheating or overcooling, affecting the uniformity and control of the reaction. In addition, a high flow rate may also accelerate the wear of the equipment, reduce its service life and increase safety hazards. However, the Venturi effect relies on the low-pressure area generated by high-speed fluid in the throat to absorb additional fluid. If the flow rate is too low, this effect will be weakened or disappear. Therefore, the liquid flow rate in the jet flow tube 8 cannot be too low, otherwise the material in the bubble tower 1 cannot be sucked into the jet flow tube 8, and the opportunity for re-mixing reaction is lost. Therefore, in order to ensure a suitable flow rate, a formula is designed to calculate the flow rate at the middle position of the inner diameter change member 18, that is, the flow rate at the throat of the Venturi tube, and the following parameters are defined: the throat diameter of the inner diameter change member 18 , the inlet diameter of the inner diameter changing member 18 , the outlet diameter of the inner diameter changing member 18 , fluid density , gas density , the fluid density of the gas-liquid mixture , fluid viscosity , the liquid flow rate sucked by the top return pipe 17 , the fluid flow rate in the jet flow tube 8 , the fluid flow rate at the bottom inlet of the jet flow tube 8 , the throat flow velocity of the inner diameter changing member 18 , equivalent height of the suction liquid It is usually the vertical distance from the throat of the jet flow pipe 8 to the suction point, and the throat flow velocity The calculation formula is as follows: , where is the pressure difference between the throat and the inlet of the inner diameter changing member 18, Calculated by the following formula:

[0042] , where g is the acceleration due to gravity.

[0043] For the above calculation formula, here is an example:

[0044] The throat diameter of the inner diameter changing member 18 =0.05m;

[0045] The inlet diameter of the inner diameter changing member 18 =0.1m;

[0046] Outlet diameter of inner diameter changing member 18 =0.08m;

[0047] Fluid density of gas-liquid mixture =900kg / m³;

[0048] Fluid viscosity =0.0011Pa.s;

[0049] Liquid flow rate sucked by top return pipe 17 =0.01m³ / s;

[0050] Fluid flow rate in the jet flow tube 8 =0.1m³ / s;

[0051] The equivalent height of the sucked liquid is H = 1m;

[0052] Gravitational acceleration g = 9.81 m / s²;

[0053] Fluid Density =830kg / m³;

[0054] Gas density =1.25kg / m³;

[0055] Pa;

[0056] m / s.

[0057] According to the measurement value of the differential pressure sensor 20, combined with the calculated throat flow rate of the inner diameter changing member 18, the required flow rate can be achieved by changing the working power of the gas-liquid mixing pump, thereby ensuring that the flow rate in the injection flow tube 8 is neither too large nor too small, thereby ensuring the full mixing reaction of gas and liquid to the greatest extent.

[0058] In the present invention, the method for preparing an organic compound comprises the following steps: S1, obtaining the throat flow rate according to calculation S2, the gas-liquid mixture is input into the jet flow tube 8 through the gas-liquid mixing pump, and the mother liquid containing the catalyst is input into the bubbling tower 1 through the liquid replenishment tube 7; S3, according to The calculated value is combined with the measured value of the pressure difference sensor 20 to adjust the output flow rate of the gas-liquid mixing pump so that The actual value is equal to the calculated value; S4, the gas and liquid are fully mixed and reacted in the jet flow tube 8 and the bubbling tower 1; S5, the waste gas is discharged from the exhaust pipe 5 at the top, and the finished product and mother liquor are discharged from the discharge pipe.

[0059] In summary, when the present invention is in use, the gas-liquid mixture is input into the jet flow tube 8 through the gas-liquid mixing pump, the gas and liquid are preliminarily mixed in the gas-liquid mixing pump for reaction, and continue to mix and react after entering the jet flow tube 8, and the jet pipe 15 ejects the gas-liquid mixture into the bubbling tower 1 for mixing reaction again, thereby improving the gas-liquid mixing reaction effect; and at the throat of the inner diameter changing member 18, due to the Venturi effect, part of the gas-liquid mixture is re-absorbed into the jet flow tube 8 by the bottom reflux pipe 16 and will be mixed with the fluid in the jet flow tube 8 again, and a mixed reaction can be formed again; in addition, the gas-liquid mixture ejected from the guide pipe 14 and the mother liquor containing the catalyst ejected from the replenishment pipe 7 will be mixed again, and the unreacted gas in the jet flow tube 8 can be fully mixed and reacted with the catalyst mother liquor, and the gas raw material that has not completely reacted in the bubbling tower 1 will float up, and will be re-absorbed into the jet flow tube 8 under the suction of the swinging top reflux pipe 17, and then ejected through the guide pipe 14 after the reaction, thereby preventing the unreacted gas from being directly discharged through the exhaust pipe 5, thereby improving the overall yield.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An organic compound preparation device, comprising a bubbling tower (1), wherein an exhaust pipe (5) is arranged at the top of the bubbling tower (1), and a liquid inlet pipe (6) and a discharge pipe are arranged at the bottom; characterized in that: Also includes: A jet flow pipe (8) is inserted into the bubbling tower (1) from the bottom of the bubbling tower (1), the jet flow pipe (8) is rotatably connected to the liquid inlet pipe (6), a plurality of jet pipes (15) are arranged on the jet flow pipe (8), and the bottom of the jet flow pipe (8) is connected to the output end of the gas-liquid mixing pump via a rotary joint (9); A power mechanism is arranged at the bottom of the bubbling tower (1) and is used to drive the jet flow tube (8) to continuously rotate forward and reverse at a set angle; An inner diameter changing member (18) is arranged on the inner wall of the jet flow tube (8), the liquid flow diameter in the middle of the inner diameter changing member (18) is the smallest, and the liquid flow diameter gradually increases in the process of moving away from the middle to the upper and lower sides, and a top return pipe (17) is arranged in the middle of the inner diameter changing member (18); And a control system, which is connected with the power mechanism control.

2. The organic compound production device according to claim 1, characterized in that: A barrel jacket (2) is arranged on the outer wall of the bubbling tower (1), and liquid flows in the barrel jacket (2). The circulating liquid is used to control the reaction temperature in the bubbling tower (1). A temperature-controlling liquid inlet pipe (3) and a temperature-controlling liquid outlet pipe (4) are arranged on the barrel jacket (2).

3. The organic compound production device according to claim 1, characterized in that: The power mechanism comprises a mounting seat (10) arranged at the bottom of the bubbling tower (1), an encoder motor (11) arranged on the mounting seat (10), a driving gear (12) arranged on the output shaft of the encoder motor (11), and a driven gear (13) arranged on the outer wall of the bottom of the jet flow tube (8), wherein the driven gear (13) meshes with the driving gear (12).

4. The organic compound production device according to claim 1, characterized in that: A flow guide pipe (14) is arranged at the top of the jet flow pipe (8), the flow guide pipe (14) being an inverted U-shaped structure, and the flow guide pipe (14) guides the liquid at the top of the jet flow pipe (8) downward and sprays it toward the inner wall of the bubbling tower (1); a liquid replenishing pipe (7) is arranged in the middle of the bubbling tower (1), and the liquid replenishing pipe (7) is located at the discharge port of the flow guide pipe (14).

5. The organic compound production device according to claim 1, characterized in that: Two inner diameter changing members (18) are arranged side by side, and a bottom reflux pipe (16) is arranged at the middle position of the lower inner diameter changing member (18), and the bottom reflux pipe (16) extends into the bubbling tower (1).

6. The organic compound production device according to claim 5, characterized in that: A protective cover (19) is provided on the inner diameter changing member (18), and a differential pressure sensor (20) is provided inside the protective cover (19). The differential pressure sensor (20) is used to detect the differential pressure at different positions in the inner diameter changing member (18), thereby converting the liquid flow rate at the middle position of the inner diameter changing member (18) through the control system.

7. The organic compound production device according to claim 6, characterized in that: Define the following parameters: The throat diameter of the inner diameter changer (18) , the inlet diameter of the inner diameter changing member (18) , the outlet diameter of the inner diameter changing member (18) , fluid density , gas density , the fluid density of the gas-liquid mixture , fluid viscosity , the liquid flow rate sucked into the top return pipe (17) , the fluid flow rate in the jet flow tube (8) , the fluid flow rate at the bottom inlet of the jet flow tube (8) , the flow velocity at the throat of the inner diameter changing member (18) , equivalent height of the suction liquid , throat velocity The calculation formula is as follows: , where is the pressure difference between the throat and the inlet of the inner diameter changing member (18), Calculated by the following formula: , where g is the acceleration due to gravity.

8. A method for preparing an organic compound, using the organic compound preparation device according to claim 7, characterized in that: The following steps are involved: S1. Obtain throat flow velocity based on calculation S2, the gas-liquid mixture is input into the jet flow tube (8) through the gas-liquid mixing pump, and the mother liquid containing the catalyst is input into the bubble tower (1) through the liquid replenishment tube (7); S3, according to The calculated value is combined with the measured value of the differential pressure sensor (20) to adjust the output flow rate of the gas-liquid mixing pump so that The actual value is equal to the calculated value; S4, the gas and liquid are fully mixed and reacted in the jet flow tube (8) and the bubble tower (1); S5, the waste gas is discharged from the exhaust pipe (5) at the top, and the finished product and mother liquor are discharged from the discharge pipe.

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