Mixing reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor and dynamic mixing method

Abstract

The invention discloses mixed reaction equipment for synthesizing a quaternary ammonium salt metal corrosion inhibitor and a dynamic mixing method, and relates to the field of chemical material mixing equipment.The mixed reaction equipment comprises a reaction tank, a center shell is rotationally arranged in the reaction tank, discharging shells are symmetrically arranged on the left side and the right side of the center shell in a penetrating mode, and feeding ports are symmetrically formed in the front side and the rear side of the center shell; according to the present invention, the slowly-rotating discharging shell is used for stirring the reaction liquid to integrally mix, the gear pieces drive the reaction liquid in the middle of the reaction tank to be sucked from the feeding port, and then the reaction liquid is discharged to the edge of the reaction tank through the discharging shell, such that the reaction liquid can be completely mixed, and the reaction liquid can be completely mixed. In the process, the feeding port and the discharging shell are in a rotary transposition state, reaction liquid in the middle of the reaction tank is uniformly conducted to the edge position, the double mixing mode greatly improves the dispersion efficiency of halogenated hydrocarbon, the mixing reaction speed is increased, and local accumulation of reaction heat is avoided.

Description

Technical Field

[0001] The invention relates to the field of chemical material mixing equipment, in particular to a mixing reaction equipment and a dynamic mixing method for synthesizing a quaternary ammonium salt metal corrosion inhibitor. Background Art

[0002] The quaternary ammonium salt metal corrosion inhibitor is synthesized by the halogenated hydrocarbon method. The tertiary amine is dissolved by solvent mixing, and then the halogenated hydrocarbon is added to the solution. The reaction temperature is controlled to react in a mixed state to generate a quaternary ammonium salt. The addition of the halogenated hydrocarbon to the solution will generate heat. In order to avoid the rapid generation of heat, the halogenated hydrocarbon is traditionally added to the solution by dripping, which can effectively control the heat generated by the reaction, but the dripping of the halogenated hydrocarbon takes a long time.

[0003] Mixing and stirring are necessary conditions for the above reaction. Mixing and stirring can not only make the dropped halogenated hydrocarbons contact and react evenly with the tertiary amine and other components, but also can disperse the added halogenated hydrocarbons in time to avoid excessive heat in local areas. The mixing function of the current reaction equipment is realized by rotating the stirring rod. Due to the high viscosity of the liquid in the reaction synthesis system of the quaternary ammonium salt, it is difficult to quickly mix the entire reaction system only by the stirring rod, so that the dispersion speed of the added halogenated hydrocarbons is slow, which not only affects the reaction speed and reaction uniformity, but also easily causes excessive heat in local areas, and this method is prone to stirring dead corners. Summary of the invention

[0004] The invention aims to provide a mixing reaction device and a dynamic mixing method for synthesizing a quaternary ammonium salt metal corrosion inhibitor, which are used to solve the problems that a stirring rod mixing mode of a traditional reaction device is single, it is difficult to implement rapid mixing of a quaternary ammonium salt synthesis reaction system with high viscosity, the mixing efficiency is low, and the mixing uniformity is poor.

[0005] In order to solve the problems of the prior art, the technical solution of the present invention is as follows: The invention discloses a mixed reaction device for synthesizing quaternary ammonium salt metal corrosion inhibitor, comprising a reaction tank, wherein a central shell is rotatably arranged inside the reaction tank, a discharge shell is symmetrically arranged on the left and right sides of the central shell, and a feed port is symmetrically provided on the front and rear sides, and both ends of the discharge shell extend to the edge of the reaction tank, four gear parts are rectangularly distributed inside the central shell, and the four gear parts are meshed and connected in sequence, and the inner wall of the central shell between adjacent feed ports and the discharge shell is an arc surface, and the edge of the gear part is slidably adapted to the arc surface, and a driving component is arranged on the top of the reaction tank, and the driving component is connected to the discharge shell through an upper shaft tube transmission, and is used for driving the discharge port to rotate around the center line of the reaction tank, and the driving component is connected to one of the gear parts through a shaft rod transmission, and the gear parts mesh and rotate synchronously, and are used for sucking materials from the feed port and discharging materials from the discharge shell.

[0006] Preferably, the driving assembly includes a motor, the bottom end of the upper shaft tube is fixedly connected to the center shell, the top end of the upper shaft tube rotates to pass through the reaction tank, the shaft rod rotates concentrically and passes through the upper shaft tube, and the output shaft of the motor is respectively connected to the upper shaft tube and the shaft rod through a gear set.

[0007] Preferably, the gear set includes a transmission shaft, which is fixedly connected to a large driving gear and a small driving gear. The output shaft of the motor is connected to the transmission shaft through a bevel gear transmission. A large driven gear is fixed to the end of the upper shaft tube, and a small driven gear is fixed to the end of the shaft rod. The large driven gear is meshed and connected to the small driving gear, and the small driven gear is meshed and connected to the large driving gear.

[0008] Preferably, a heat exchange plate is fixed in the discharge shell, and the material conducted in the discharge shell can contact both sides of the heat exchange plate. The heat exchange plate has a plurality of heat exchange channels running through from top to bottom. The top and bottom of the heat exchange channel are respectively connected to the liquid inlet passage and the liquid discharge passage, which are used to conduct the cooling medium through the heat exchange channel from top to bottom.

[0009] Preferably, the liquid inlet passage comprises an upper liquid channel opened on the top of the discharge shell, the bottom end of the upper shaft tube passes through the upper liquid channel, the top end of the upper shaft tube rotates and passes through an upper sleeve shell, and the upper sleeve shell is connected to the liquid inlet pipe.

[0010] Preferably, the drainage passage includes a lower liquid channel opened at the bottom of the discharge shell, a lower shaft tube is fixed to the bottom of the discharge shell, the lower shaft tube is connected to the lower liquid channel, the lower shaft tube passes through the bottom of the reaction tank and is rotatably connected to a lower sleeve shell, and the lower sleeve shell is connected to a circulation pump through a drainage pipe.

[0011] Preferably, a temperature sensor is provided in the reaction tank, the drive assembly is transmission-connected with an encoder, and the encoder, the temperature sensor and the circulation pump are electrically connected to a controller.

[0012] Preferably, the arc surface of the inner wall of the central shell between the adjacent feed ports and discharge shells is at least 1 / 4 of a circle.

[0013] Preferably, the feed opening is open.

[0014] A dynamic mixing method for synthesizing a quaternary ammonium salt metal corrosion inhibitor using the mixing reaction equipment comprises the following steps: A. Add a solvent into a reaction tank, and then introduce a certain amount of tertiary amine into the solvent to form a dissolving solution; B. Turn on the driving assembly to drive the central shell to drive the discharge shell to rotate. The rotating discharge shell is used to stir the dissolved liquid. During this process, the positions of the feed port and the discharge shell in the reaction tank rotate and change; C. The driving assembly drives one of the gear parts to rotate at the same time, and the four gear parts rotate synchronously through meshing transmission. The rotation direction of the gear parts is from the feed port along the arc surface inside the center shell to the discharge shell direction, so that the dissolved liquid in the middle of the reaction tank is sucked in from the feed port and then discharged to the edge of the reaction tank through the discharge shell; D. Add the halogenated hydrocarbons dropwise into the middle of the reaction tank, and mix the halogenated hydrocarbons by rotating and stirring the discharge shell and sucking the materials from the feed port and discharging them from the discharge shell.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention uses a slowly rotating discharge shell to stir the reaction liquid for overall mixing. The gear member drives the reaction liquid in the middle of the reaction tank to be sucked in through the feed port, and then discharged to the edge of the reaction tank through the discharge shell. During this process, the feed port and the discharge shell are in a rotational transposition state, so that the reaction liquid in the middle of the reaction tank is uniformly conducted to the edge position. The double mixing method greatly improves the dispersion efficiency of halogenated hydrocarbons, accelerates the mixing reaction speed, and avoids the local accumulation of reaction heat.

[0016] 2. The present invention drives the cooling medium through the heat exchange channel of the heat exchange plate through a circulating pump. The reaction liquid conducted in the discharge shell contacts both sides of the heat exchange plate, which is used to exchange heat with the cooling medium to achieve cooling of the reaction liquid. Since the discharge shell is in a state of dynamically conducting the reaction liquid, the heat exchange plate is arranged in the discharge shell to accelerate the efficiency and uniformity of cooling the reaction liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is one of the overall structural schematic diagrams of the present invention.

[0018] Figure 2 This is the second schematic diagram of the overall structure of the present invention.

[0019] Figure 3 It is a schematic diagram of the internal structure of the reaction tank of the present invention.

[0020] Figure 4 It is a schematic diagram of the distribution of the central shell and the discharge shell in the reaction tank of the present invention.

[0021] Figure 5 It is a schematic diagram of the distribution and motion state of the gear parts of the present invention.

[0022] Figure 6 It is a schematic diagram of the transmission connection structure between the shaft rod and the gear member of the present invention.

[0023] Figure 7 It is a schematic diagram of the cross-sectional structure of the reaction tank of the present invention.

[0024] Figure 8 It is a schematic diagram of the structure of the driving component of the present invention.

[0025] Fig. 9 It is a schematic diagram of the connection structure of the liquid inlet passage, the liquid discharge passage and the heat exchange plate of the present invention.

[0026] Fig.10 This is a schematic diagram of the shaft rod penetrating the upper shaft tube structure of the present invention.

[0027] Figure numerals: 1. reaction tank; 11. discharge port; 2. center shell; 21. discharge shell; 22. feed port; 23. gear part; 24. heat exchange plate; 25. upper liquid channel; 26. lower liquid channel; 3. upper shaft tube; 31. shaft rod; 32. upper shell; 33. liquid inlet pipe; 4. drive assembly; 41. motor; 42. transmission shaft; 43. large drive gear; 44. small drive gear; 45. small driven gear; 46. large driven gear; 47. encoder; 5. lower shell; 51. lower shaft tube; 52. discharge pipe; 6. circulation pump. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] like Figure 1 , Figure 2 As shown, the mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor has a dual-function mixing mode and a reaction liquid cooling mode. The reaction tank 1 has a tank body and a tank cover. The surface of the tank cover is equipped with a feeding port, an injection port, a pressure sensor, a pressure relief valve port and other conventional components for completing reaction conditions. A discharge port 11 is set on the bottom side of the tank body.

[0030] The structural principle of the dual-function hybrid mode is as follows: like Figure 3 , Figure 4 As shown, the central shell 2 is arranged at the center line position inside the reaction tank 1, the bottom of the central shell 2 is rotatably connected to the bottom surface of the reaction tank 1 through the lower shaft tube 51, and the top of the central shell 2 is rotatably connected to the top surface of the reaction tank 1 through the upper shaft tube 3, and two discharge shells 21 are symmetrically fixed on the left and right sides of the central shell 2. The discharge shell 21 is a square plate as a whole, and the discharge shell 21 has an inner cavity passing through both ends. One end of the discharge shell 21 is connected to the central shell 2, and the other end of the discharge shell 21 extends to the edge position of the reaction tank 1, and open feed ports 22 are symmetrically opened on the front and back sides of the central shell 2.

[0031] like Figure 4 , Figure 5 , Figure 6As shown, four gear members 23 of the same specification are rotatably installed inside the center shell 2. The four gear members 23 are distributed in a rectangular shape, and the four gear members 23 are meshed and connected in sequence. The inner wall of the center shell 2 between the adjacent feed port 22 and the discharge shell 21 is an arc surface, and it is ensured that the arc surface is at least 1 / 4 circle. The edge of the gear member 23 is slidably adapted to the corresponding arc surface. A shaft rod 31 is set through the upper shaft tube 3, and a gear is fixed at the bottom end of the shaft rod 31. A gear is fixed at the top end of one of the gear members 23, and the shaft rod 31 is meshed with the gear member 23 through gears.

[0032] like Figure 7 , Figure 8 As shown, the driving assembly 4 includes a motor 41, a packaging shell is fixed on the top of the reaction tank 1, the motor 41 is installed on the side of the packaging shell, the upper shaft tube 3 and the shaft rod 31 are rotated to penetrate into the packaging shell, the shaft rod 31 is higher than the upper shaft tube 3, the gear set includes a transmission shaft 42, the transmission shaft 42 is vertically rotated and installed in the packaging shell, the transmission shaft 42 is fixed with a large driving gear 43 on the upper part, a small driving gear 44 on the lower part, and a bevel gear on the middle part, the output of the motor 41 is fixed with the bevel gear, and the motor 41 is connected to the transmission shaft 42 through matching meshing bevel gears, a small driven gear 45 is fixed at the end of the shaft rod 31, a large driven gear 46 is fixed at the end of the upper shaft tube 3, the large driven gear 46 is meshed and connected with the small driving gear 44, and the small driven gear 45 is meshed and connected with the large driving gear 43; A solvent is placed in the reaction tank 1, and a certain amount of tertiary amine is introduced into the reaction tank 1 to dissolve the tertiary amine and the solvent to form a solution, and a halogenated hydrocarbon is added dropwise into the reaction tank 1, and the motor 41 is turned on to drive the large driving gear 43 and the small driving gear 44 to rotate synchronously, and the upper shaft tube 3 rotates slowly through the meshing transmission of the large driven gear 46 and the small driving gear 44, and the shaft rod 31 rotates quickly through the meshing transmission of the large driven gear 46 and the large driving gear 43; The upper shaft tube 3 drives the central shell 2 and the discharge shell 21 to rotate slowly around the center line of the reaction tank 1, and the solution in the reaction tank 1 is stirred and mixed as a whole through the discharge shell 21. The shaft 31 drives one of the gear parts 23 to rotate, and all the gear parts 23 rotate synchronously through meshing transmission. The rotation direction of the gear part 23 is from the feed port 22 along the arc surface inside the central shell 2 to the discharge shell 21. The position of the feed port 22 forms a negative pressure due to the meshing separation of the gear part 23, so that the solution enters the central shell 2 from the feed port 22 and is brought to the discharge shell 21 by the gear part 23, so that the solution is sucked in by the feed port 22 and discharged from the discharge shell 21. The basic principle of this process is the same as the basic principle of the existing gear pump. The slowly rotating discharge shell 21 is used to stir the reaction liquid for overall mixing. The gear part 23 drives the reaction liquid in the middle of the reaction tank 1 to be sucked in through the feed port 22, and then discharged to the edge of the reaction tank 1 through the discharge shell 21. During this process, the feed port 22 and the discharge shell 21 are in a rotational transposition state, so that the reaction liquid in the middle of the reaction tank 1 is evenly conducted to the edge position. The double mixing method greatly improves the dispersion efficiency of halogenated hydrocarbons, accelerates the mixing reaction speed, and avoids local accumulation of reaction heat.

[0033] The halogenated hydrocarbon is added at the middle of the reaction tank 1 so that the dropped halogenated hydrocarbon can be quickly sucked into the feed port 22 and then dispersed and conducted to the edge area of ​​the reaction tank 1 through the discharge shell 21, thereby effectively increasing the mixing speed of the halogenated hydrocarbon.

[0034] When the gear member 23 is meshed and conducts the reaction liquid, the gear member 23 can crush the solid material and the viscous material in the reaction liquid, so that such raw materials that are not easily dissolved can be refined, thereby accelerating the dissolution efficiency.

[0035] The structural principle of the reaction liquid cooling mode is as follows: like Figure 4 , Fig. 9 , Fig.10 As shown, a heat exchange plate 24 is fixed in the discharge shell 21. The heat exchange plate 24 is in the shape of a thin plate. The heat exchange plate 24 is parallel to the conduction direction of the reaction liquid in the discharge shell 21. The heat exchange plate 24 has a plurality of heat exchange channels that are connected up and down. The liquid inlet passage includes an upper liquid channel 25 opened on the top of the discharge shell 21. The top of the heat exchange channel is connected to the upper liquid channel 25. There is a gap between the upper shaft tube 3 and the shaft rod 31. The gap is connected to the upper liquid channel 25. The upper shell 32 is provided at the top of the reaction tank 1 in a sealed and rotatable manner, so that the upper shell 32 is connected to the upper shaft tube 3, the upper shell 32 is connected to a liquid inlet pipe 33, the liquid inlet pipe 33 is connected to an external cooling medium source, the discharge passage includes a lower liquid channel 26 opened at the bottom of the discharge shell 21, the lower shaft tube 51 is connected to the lower liquid channel 26, the lower shaft tube 51 passes through the bottom of the reaction tank 1 and is sealed and rotatably connected to the lower shell 5, and the lower shell 5 is connected to the water inlet end of the circulation pump 6 through the discharge pipe 52; The circulation pump 6 is turned on to suck the cooling medium. The cooling medium enters the heat exchange channel of the heat exchange plate 24 through the liquid inlet pipe 33, the upper shell 32, the upper shaft tube 3, and the upper liquid channel 25 in sequence, and then is discharged through the lower liquid channel 26, the lower shaft tube 51, the lower shell 5, and the liquid discharge pipe 52. The reaction liquid conducted in the discharge shell 21 is in double-sided contact with the heat exchange plate 24 for heat exchange with the cooling medium to achieve cooling of the reaction liquid. Since the discharge shell 21 is in a state of dynamically conducting the reaction liquid, the heat exchange plate 24 is arranged in the discharge shell 21 to accelerate the efficiency and uniformity of cooling the reaction liquid.

[0036] A temperature sensor is installed in the reaction tank 1, and the output shaft of the motor 41 of the driving component 4 is connected to the encoder 47. The encoder 47, the temperature sensor, and the circulating pump 6 are electrically connected to the controller. The temperature of the reaction liquid is monitored by the temperature sensor and transmitted to the controller. When the temperature of the reaction liquid is too high, the controller controls the circulating pump 6 to conduct the cooling medium to cool the reaction liquid. The encoder 47 is used to monitor whether the mixing work is in progress. During the normal mixing work, if the encoder 47 detects that the motor 41 stops working unexpectedly, the controller controls the circulating pump 6 to start the maximum working mode to avoid high temperature out of control of the reaction liquid due to accidental stop of the stirring work.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixed reaction device for synthesizing a quaternary ammonium salt metal corrosion inhibitor, comprising a reaction tank (1), wherein a central shell (2) is rotatably arranged inside the reaction tank (1), a discharge shell (21) is symmetrically arranged on the left and right sides of the central shell (2), and a feed port (22) is symmetrically provided on the front and rear sides, characterized in that: Both ends of the discharge shell (21) extend to the edge of the reaction tank (1); four gear members (23) are distributed in a rectangular shape inside the central shell (2); the four gear members (23) are meshed and connected in sequence; the inner wall of the central shell (2) between adjacent feed ports (22) and the discharge shell (21) is an arc surface; the edge of the gear member (23) is slidably matched with the arc surface; a driving assembly (4) is arranged on the top of the reaction tank (1); the driving assembly (4) is connected to the discharge shell (21) through an upper shaft tube (3) for driving the discharge port (11) to rotate around the center line of the reaction tank (1); the driving assembly (4) is connected to one of the gear members (23) through a shaft rod (31); the gear members (23) mesh and rotate synchronously with each other for sucking materials from the feed port (22) and discharging materials from the discharge shell (21).

2. The mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor according to claim 1, characterized in that, The driving assembly (4) comprises a motor (41), the bottom end of the upper shaft tube (3) is fixedly connected to the central shell (2), the top end of the upper shaft tube (3) rotates to pass through the reaction tank (1), the shaft rod (31) rotates coaxially and passes through the upper shaft tube (3), and the output shaft of the motor (41) is respectively connected to the upper shaft tube (3) and the shaft rod (31) through a gear set.

3. The mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor according to claim 2, characterized in that, The gear set comprises a transmission shaft (42), the transmission shaft (42) being fixedly connected to a large driving gear (43) and a small driving gear (44), the output shaft of the motor (41) being connected to the transmission shaft (42) via a bevel gear transmission, a large driven gear (46) being fixedly connected to the end of the upper shaft tube (3), a small driven gear (45) being fixedly connected to the end of the shaft rod (31), the large driven gear (46) being meshingly connected to the small driving gear (44), and the small driven gear (45) being meshingly connected to the large driving gear (43).

4. The mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor according to claim 1, characterized in that, A heat exchange plate (24) is fixed inside the discharge shell (21), and the material conducted in the discharge shell (21) can contact two surfaces of the heat exchange plate (24). The heat exchange plate (24) has a plurality of heat exchange channels extending vertically therethrough, and the top and bottom of the heat exchange channels are respectively connected to a liquid inlet channel and a liquid discharge channel, so as to conduct cooling medium from top to bottom through the heat exchange channels.

5. The mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor according to claim 4, characterized in that, The liquid inlet passage comprises an upper liquid passage (25) opened at the top of the discharge shell (21); the bottom end of the upper shaft tube (3) passes through the upper liquid passage (25); the top end of the upper shaft tube (3) rotates through an upper sleeve shell (32); and the upper sleeve shell (32) is connected to a liquid inlet pipe (33).

6. The mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor according to claim 4, characterized in that, The liquid discharge passage comprises a lower liquid channel (26) opened at the bottom of the discharge shell (21); a lower shaft tube (51) is fixed to the bottom of the discharge shell (21); the lower shaft tube (51) is connected to the lower liquid channel (26); the lower shaft tube (51) passes through the bottom of the reaction tank (1) and is rotatably connected to a lower casing (5); and the lower casing (5) is connected to a circulation pump (6) via a liquid discharge tube (52).

7. The mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor according to claim 6, characterized in that: The reaction tank (1) is provided with a temperature sensor, the drive assembly (4) is transmission-connected to an encoder (47), and the encoder (47), the temperature sensor, and the circulation pump (6) are electrically connected to a controller.

8. The mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor according to claim 1, characterized in that: The arc surface of the inner wall of the center shell (2) between the adjacent feed openings (22) and discharge shells (21) is at least 1 / 4 of a circle.

9. The mixed reaction equipment for synthesizing quaternary ammonium salt metal corrosion inhibitor according to claim 1, characterized in that: The feed port (22) is open.

10. A dynamic mixing method for synthesizing a quaternary ammonium salt metal corrosion inhibitor using the mixed reaction equipment according to any one of claims 1 to 9, characterized in that: The steps include: A. adding a solvent into a reaction tank (1), and then introducing a certain amount of tertiary amine into the solvent to form a solution; B. Turning on the driving assembly (4) to drive the central shell (2) to drive the discharge shell (21) to rotate. The rotating discharge shell (21) is used to stir the dissolved liquid. During this process, the positions of the feed port (22) and the discharge shell (21) in the reaction tank (1) rotate and change; C. The driving assembly (4) drives one of the gear members (23) to rotate simultaneously, and the four gear members (23) rotate synchronously through meshing transmission. The gear member (23) rotates from the feed inlet (22) along the arc surface inside the central shell (2) toward the discharge shell (21), so that the dissolved liquid in the middle of the reaction tank (1) is sucked in through the feed inlet (22) and then discharged to the edge of the reaction tank (1) through the discharge shell (21); D. The halogenated hydrocarbon is added dropwise to the middle of the reaction tank (1), and the halogenated hydrocarbon is mixed by the rotation and stirring of the discharge shell (21) and the material is sucked in from the feed port (22) and discharged from the discharge shell (21).

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