PH detecting and adjusting system for flunixin synthesis

Abstract

The utility model provides a pH detecting and adjusting system for flunixin synthesis. The pH detecting and adjusting system comprises a reactor, and a motor, a pH adjusting agent inlet, a reflux inlet and a reactant inlet are arranged at the top of the reactor. A product outlet is also formed in the bottom of the reactor. A first valve is mounted at the pH regulator inlet, a second valve and a third valve which are connected in parallel are connected to the product outlet, a filtering device, a circulating pump and a pH detection device are sequentially connected behind the third valve in the material flowing direction, and the pH detection device is connected with the reflux liquid inlet. According to the system provided by the utility model, solid materials in the materials are filtered through the filtering device, so that the interference of the solid materials on a pH detection result is reduced. Meanwhile, the pH detection device can detect the pH value of the material in the reactor in real time, is convenient and rapid, does not need manual sampling, reduces the labor intensity and danger of workers, does not overflow the material or peculiar smell in the detection process, and is safer and more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical synthesis, in particular to a pH detection and adjustment system for flunixin synthesis. Background Art

[0002] Flunixin meglumine is a new type of non-steroidal antipyretic analgesic drug for animals. It is the only antipyretic analgesic and anti-inflammatory drug for animals. It is a nicotinic acid derivative and an inhibitor of cyclooxygenase. At present, the production and preparation of flunixin meglumine is mainly divided into two steps. The first is the synthesis of the intermediate flunixin, and then the salt formation reaction between flunixin and meglumine to obtain flunixin meglumine. The quality of flunixin meglumine is determined by the quality of its intermediate flunixin.

[0003] The molecular formula of flunixin is C 14 H 11 F 3 N 2 O 2 , the chemical name is 2-[[2-methyl-3-(trifluoromethyl)phenyl]amino]-3-pyridinecarboxylic acid, and its preparation process includes the reaction of raw materials, adjustment of the pH of the reaction solution, filtration, washing, and drying. The adjustment of the pH of the reaction solution is an extremely important step in the synthesis of flunixin. In the prior art, when adjusting the pH in the preparation process of flunixin, manual real-time sampling is used to measure the pH, and then the pH is adjusted. However, the synthesis reaction system of flunixin is a two-phase reaction, in which the viscosity of the solid material is relatively large, making manual sampling difficult, and manual sampling is also prone to contamination of the sample, resulting in errors in the test results and affecting the quality of the synthesis. At the same time, there is a high concentration of acid involved in the synthesis system, and manual sampling is more dangerous. Utility Model Content

[0004] The utility model provides a pH detection and adjustment system for flunixin synthesis, which is used to solve the problem of great difficulty in detecting the pH of the adjustment system during the flunixin synthesis process.

[0005] The utility model provides a pH detection and adjustment system for flunixin synthesis, including a reactor, a motor is arranged at the top center of the reactor, and the output end of the motor is connected to a stirring device that penetrates the top of the reactor. A pH adjusting agent inlet and a reflux liquid inlet are arranged on both sides of the motor, a reactant inlet is also arranged between the pH adjusting agent inlet and the motor, and a product outlet is also arranged at the bottom of the reactor. A pH adjusting agent storage tank is connected to the pH adjusting agent inlet, a first valve is installed between the pH adjusting agent inlet and the pH adjusting agent storage tank, a second valve and a third valve connected in parallel are connected to the product outlet, a filtering device, a circulating pump and a pH detection device are sequentially connected along the material flow direction after the third valve, and the outlet of the pH detection device is connected to the reflux liquid inlet.

[0006] Optionally, the pH detection device includes a pH analyzer located between the circulation pump and the reflux liquid inlet. A fourth valve is installed between the circulation pump and the pH analyzer, and a fifth valve is installed between the reflux liquid inlet and the pH analyzer. A cleaning agent storage tank is also connected to the pH analyzer and the fourth valve through a pipeline, a cleaning agent recovery tank is also connected to the pH analyzer and the fifth valve through a pipeline, and a water suction pump is also provided on the pipeline between the cleaning agent recovery tank and the pH analyzer. Sixth valves are respectively provided on the inlet pipeline of the water suction pump and the outlet pipeline of the cleaning agent storage tank.

[0007] Optionally, the pH analyzer, the first valve, the second valve and the third valve are electrically connected to the controller.

[0008] Optionally, the stirring device includes a driving rod that passes through the top of the reactor and is directly connected to the motor, and a plurality of radial stirring blades are installed on the driving rod; upper and lower sides of the radial stirring blades are symmetrically provided with upper spiral stirring blades and lower spiral stirring blades connected to the driving rod. A sleeve is fixedly connected to the bottom of the driving rod, and a U-shaped stirrer is connected to the sleeve.

[0009] Optionally, the bottom shape of the U-shaped stirrer matches the bottom shape of the reactor, and the two side rods of the U-shaped stirrer fit the inner side wall of the reactor. A cross bar is connected between the two side rods of the U-shaped stirrer and the driving rod, and a longitudinal bar is connected between the cross bar and the bottom of the U-shaped stirrer.

[0010] Optionally, the length of the radial stirring blade is greater than the spiral radius of the upper spiral stirring blade and the lower spiral stirring blade.

[0011] Optionally, the filtering device includes an inclined screw conveyor, the screw conveyor includes a housing, a second motor is installed at the inclined upper end of the housing, and the output end of the second motor is connected to a spiral shaft located inside the housing. A material inlet is provided above the inclined lower end of the housing, a liquid outlet is provided below the inclined lower end, and a solid outlet is provided at the bottom of the inclined upper end of the housing. The material inlet is connected to the third valve, and the liquid outlet is connected to the circulation pump. A bracket for support is also installed on the housing. A filter plate is also installed at the connection between the liquid outlet and the housing.

[0012] Optionally, a plurality of filter holes are evenly arranged on the spiral sheet of the spiral shaft.

[0013] The pH detection and adjustment system for flunixin synthesis provided by the utility model allows the material to flow out of the reactor continuously, and the solid material in the material is filtered through the filtering device, thereby reducing the interference of the solid material on the pH detection result. After being transported by the circulating pump, the material reaches the pH detection device for detection, and returns to the reactor again after the detection is completed. In this process, the pH detection device can detect the pH value of the material in the reactor in real time, which is convenient and fast, without manual sampling, reducing the labor intensity and danger of manual labor, and there is no material or odor overflow during the detection process, which is safer and more efficient.

[0014] By setting up a cleaning agent storage tank, the cleaning agent in it is used to clean the pH analyzer after the work is completed, which increases the service life of the equipment. After the cleaning is completed, the water suction pump is used to suck all the cleaning agents in the pipeline into the cleaning agent recovery tank as much as possible, so as to avoid the cleaning agent from contaminating the material. Through the operation of the controller, the manual work intensity is reduced and the accuracy of the system operation is improved.

[0015] The synergistic effect of the upper spiral stirring blade, the lower spiral stirring blade, the radial stirring blade and the U-shaped stirrer improves the mixing degree between the pH adjuster and the material, greatly improving the efficiency of the pH adjuster in adjusting the pH value of the material. The synergistic effect of the screw conveyor and its internal structures improves the efficiency of solid-liquid separation of the material in the filtration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a pH detection and adjustment system for flunixin synthesis provided in one embodiment of the utility model;

[0018] Figure 2 A schematic structural diagram of a pH detection and adjustment system for flunixin synthesis provided by another embodiment of the utility model;

[0019] Figure 3 A schematic diagram of the structure of a reactor provided in one embodiment of the utility model;

[0020] Figure 4 An axonometric diagram of a stirring device provided in one embodiment of the utility model;

[0021] Figure 5This is a schematic structural diagram of a screw conveyor provided in one embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1-reactor, 2-filter, 3-circulation pump, 4-pH detection device, 11-motor, 12-stirring device, 13-adjusting agent inlet, 14-reflux liquid inlet, 15-product outlet, 16-adjusting agent storage tank, 17-first valve, 18-second valve, 19-third valve, 21-screw conveyor, 22-housing, 23-second motor, 24-screw shaft, 25-material inlet, 26-liquid outlet, 27-solid outlet, 28 - bracket, 29- filter plate, 41- pH analyzer, 42- fourth valve, 43- fifth valve, 44- cleaning agent storage tank, 45- cleaning agent recovery tank, 46- water suction pump, 47- sixth valve, 48- controller, 111- reactant inlet, 121- driving rod, 122- upper spiral stirring blade, 123- lower spiral stirring blade, 124- radial stirring blade, 125- sleeve, 126- U-shaped agitator, 127- cross bar, 128- longitudinal bar. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the utility model.

[0025] like Figure 1 As shown, the utility model provides a pH detection and adjustment system for flunixin synthesis, including a reactor 1, a motor 11 is arranged at the top center of the reactor 1, and the output end of the motor 11 is connected to a stirring device 12 that penetrates the top of the reactor 1. A pH adjusting agent inlet 13 and a reflux liquid inlet 14 are arranged on both sides of the motor 11, a reactant inlet 111 is also arranged between the pH adjusting agent inlet 13 and the motor 11, and a product outlet 15 is also arranged at the bottom of the reactor 1. A pH adjusting agent storage tank 16 is connected to the pH adjusting agent inlet 13, a first valve 17 is installed between the pH adjusting agent inlet 13 and the pH adjusting agent storage tank 16, a second valve 18 and a third valve 19 connected in parallel are connected to the product outlet 15, a filtering device 2, a circulating pump 3 and a pH detection device 4 are sequentially connected behind the third valve 19 along the material flow direction, and the outlet of the pH detection device 4 is connected to the reflux liquid inlet 14.

[0026] During operation, the reactants required for synthesizing flunixin are first added into the reactor 1 from the reactant inlet 111. After the reactants are added, the reactant inlet 111 is closed, the motor 11 is started, and the stirring device 12 is driven by the motor 11 to stir the reaction materials. When the reaction is completed, that is, the reaction time reaches the calculated reaction completion time, the third valve 19 at the product outlet 15 is opened, and the filter device 2, the circulation pump 3 and the pH detection device 4 connected to the third valve 19 are opened at the same time.

[0027] The material after the reaction is completed flows out from the product outlet 15 and reaches the filter device 2 through the third valve 19. The filter device 2 separates the solid material in the material, and the remaining liquid material reaches the pH detection device 4 under the transportation of the circulation pump 3. The pH detection device 4 detects the pH of the liquid material from the reactor 1. After the detection is completed, the material re-enters the reactor 1 from the reflux liquid inlet 14. At the same time, the opening and time of the first valve 17 are controlled according to the detection results, so that a certain amount of pH adjuster enters the reactor 1 from the pH adjuster storage tank 16 through the pH adjuster inlet 13 to adjust the pH value of the material therein. During the pH value adjustment process, the motor 11 continuously drives the stirring device 12 to stir, so that the pH adjuster can be fully mixed with the material.

[0028] When the pH detection device 4 detects that the pH value of the material reaches the preset value, the first valve 17 is closed and the addition of the pH adjuster is stopped. At the same time, the motor 11 and the third valve 19, as well as the related equipment after the third valve 19, are closed. The second valve 18 is opened, and the material flows out from the product outlet 15 and enters the next process section through the second valve 18.

[0029] The pH detection and adjustment system for flunixin synthesis provided by the utility model allows the material to flow out of the reactor 1 continuously, and the solid material in the material is filtered by the filtering device 2, which reduces the interference of the solid material on the pH detection result, and then is transported to the pH detection device 4 by the circulating pump 3 for detection. It should be noted that the filtered solid material is the solid raw material remaining after the reaction is completed. This part of the material will not affect the reactant ratio or product composition after being filtered. After the detection is completed, the material returns to the reactor 1 from the reflux liquid inlet 14. In this process, the pH detection device 4 can detect the pH value of the material in the reactor 1 in real time, which is convenient and fast, without manual sampling, reducing the labor intensity and danger of manual labor, and there is no material or odor overflow during the detection process, which is safer and more efficient.

[0030] like Figure 2As shown, further, the pH detection device 4 includes a pH analyzer 41 located between the circulation pump 3 and the reflux liquid inlet 14. A fourth valve 42 is installed between the circulation pump 3 and the pH analyzer 41, and a fifth valve 43 is installed between the reflux liquid inlet 14 and the pH analyzer 41. A cleaning agent storage tank 44 is also connected to the pH analyzer 41 and the fourth valve 42 through a pipeline, and a cleaning agent recovery tank 45 is also connected to the pH analyzer 41 and the fifth valve 43 through a pipeline. A water suction pump 46 is also provided on the pipeline between the cleaning agent recovery tank 45 and the pH analyzer 41. Sixth valves 47 are respectively provided on the inlet pipeline of the water suction pump 46 and the outlet pipeline of the cleaning agent storage tank 44.

[0031] When the pH value is detected, the fourth valve 42 and the fifth valve 43 are opened, and the two sixth valves 47 between the pH analyzer 41 and the cleaning agent storage tank 44 and the cleaning agent recovery tank 45 remain closed. At this time, a loop is formed between the product outlet 15, the filter device 2, the circulation pump 3, the pH analyzer 41 and the reflux liquid inlet 14, so that the pH analyzer 41 can continuously detect the pH value of the material in the reactor 1. When the pH value of the material is adjusted, when the pH analyzer 41 needs to be cleaned, the fourth valve 42 and the fifth valve 43 are closed, and the two sixth valves 47 and the water suction pump 46 are opened, so that the cleaning agent in the cleaning agent storage tank 44 continuously flows through the pH analyzer 41, thereby completing the flushing of the pH analyzer 41. The cleaning agent finally flows to the cleaning agent recovery tank 45 for recovery. After the flushing is completed, the sixth valve 47 between the pH analyzer 41 and the cleaning agent storage tank 44 is closed, so that the water suction pump 46 sucks all the cleaning agent in the pipeline into the cleaning agent recovery tank 45 as much as possible, thereby avoiding the cleaning agent from contaminating the material.

[0032] like Figure 2 As shown, further, the pH analyzer 41 , the first valve 17 , the second valve 18 and the third valve 19 are electrically connected to the controller 48 .

[0033] When the pH value of the material needs to be detected, the controller 48 controls the second valve 18 to close and the third valve 19 to open, and the pH analyzer 41 transmits the measured pH value of the material to the controller 48. When the pH value needs to be adjusted, the controller 48 controls the opening of the first valve 17 according to the pH value measured by the pH analyzer 41. When the pH value of the material is adjusted to the target value, the controller 48 controls the first valve 17 to close, and controls the second valve 18 to open and the third valve 19 to close. The controller 48 controls the opening and switching of the first valve 17, the second valve 18 and the third valve 19, which reduces the manual work intensity and improves the accuracy of the system operation.

[0034] like Figure 3 and Figure 4As shown, further, the stirring device 12 includes a driving rod 121 that passes through the top of the reactor 1 and is directly connected to the motor 11, and a plurality of radial stirring blades 124 are installed on the driving rod 121; upper spiral stirring blades 122 and lower spiral stirring blades 123 connected to the driving rod 121 are symmetrically arranged on the upper and lower sides of the radial stirring blades 124. A sleeve 125 is fixedly connected to the bottom of the driving rod 121, and a U-shaped stirrer 126 is connected to the sleeve 125.

[0035] The upper spiral stirring blade 122 and the lower spiral stirring blade 123 are symmetrically arranged, and their spiral directions are opposite. When stirring the material, by controlling the rotation direction of the output end of the motor 11, the upper spiral stirring blade 122 transfers the material in the reactor 1 from top to bottom, and the lower spiral stirring blade 123 transfers the material in the reactor 1 from bottom to top, thereby strengthening the turbulence degree of the material in the axial direction, thereby improving the mixing degree between the pH adjuster and the material, and improving the working efficiency.

[0036] The multiple radial stirring blades 124 arranged between the upper spiral stirring blade 122 and the lower spiral stirring blade 123 have high shear force and diffusion capacity during operation, and can efficiently transfer the upper spiral stirring blade 122 and the lower spiral stirring blade 123 to the material in the middle for radial mixing. At the same time, the U-shaped stirrer 126 on the sleeve 125 connected to the bottom of the driving rod 121 can generate horizontal circulation during stirring. The synergistic effect between the above multiple structures greatly improves the efficiency of adjusting the pH value of the material.

[0037] like Figure 3 and Figure 4 As shown, further, the bottom shape of the U-shaped stirrer 126 matches the bottom shape of the reactor 1, and the two side rods of the U-shaped stirrer 126 fit the inner wall of the reactor 1. A cross bar 127 is connected between the two side rods of the U-shaped stirrer 126 and the driving rod 121, and a longitudinal rod 128 is connected between the cross bar 127 and the bottom of the U-shaped stirrer 126.

[0038] The bottom shape of the U-shaped agitator 126 matches the bottom shape of the reactor 1, so that when stirring, the material deposited at the bottom of the reactor 1 can be brought up to improve the mixing degree between the materials. The two side rods of the U-shaped agitator 126 fit the inner wall of the reactor 1. During the rotation and stirring, the material attached to the side wall of the reactor 1 can be scraped off to further improve the mixing degree of the materials. A cross bar 127 and a longitudinal bar 128 are added to the U-shaped agitator 126, which not only increases the degree of stirring and mixing, but also improves the strength of the U-shaped agitator 126 and increases its service life. The cross bar 127 is arranged between the upper spiral stirring blade 122 or the lower spiral stirring blade 123 and the radial stirring blade 124.

[0039] Furthermore, the length of the radial stirring blade 124 is greater than the spiral radius of the upper spiral stirring blade 122 and the lower spiral stirring blade 123 .

[0040] The radial stirring blade 124 , which is longer than the spiral radius of the upper spiral stirring blade 122 and the lower spiral stirring blade 123 , has a larger stirring range and can better disperse the materials from the upper and lower sides of the radial stirring blade 124 during stirring.

[0041] like Figure 5 As shown, further, the filtering device 2 includes an inclined screw conveyor 21, the screw conveyor 21 includes a housing 22, a second motor 23 is installed at the inclined upper end of the housing, and the output end of the second motor 23 is connected to a spiral shaft 24 located inside the housing 22. A material inlet 25 is provided above the inclined lower end of the housing 22, a liquid outlet 26 is provided below the inclined lower end, and a solid outlet 27 is provided at the bottom of the inclined upper end of the housing 22. The material inlet 25 is connected to the third valve 19, and the liquid outlet 26 is connected to the circulation pump 3. A bracket 28 for support is also installed on the housing 22. A filter plate 29 is also installed at the connection between the liquid outlet 26 and the housing 22. Further, a plurality of filter holes are evenly provided on the spiral sheet of the spiral shaft 24.

[0042] When filtering the material, i.e., solid-liquid separation, the material enters the screw conveyor 21 from the material inlet 25 opened above the inclined lower end of the housing 22. After the solid-liquid mixed material enters the screw conveyor 21, most of the liquid material is filtered out of the solid material by the filter plate 29, and then flows out from the liquid outlet 26 opened below the inclined lower end of the housing 22. The remaining liquid material and solid material are transferred to the inclined upper end of the housing 22 under the conveyance of the spiral shaft 24.

[0043] In the process of conveying materials by the spiral shaft 24, the solid materials gradually transfer to the inclined upper end of the shell 22, and after reaching the inclined upper end, flow out from the solid outlet 27. The collected solid materials are solid raw materials that have not reacted completely. When the next batch of reactions is to be carried out, this part of the solid materials will be re-introduced into the reactor 1 from the reactant inlet 111 for treatment. It should be noted that when reacting, the solid raw materials need to be excessive, so the recycled solid raw materials will not affect the reactant ratio. The liquid material flows down from the multiple filter holes opened on the spiral sheet of the spiral shaft 24 during the transfer process, and finally flows out from the liquid outlet 26 at the inclined lower end. A bracket 28 for support is also installed on the shell 22.

[0044] The present invention is further described in detail below in conjunction with specific embodiments.

[0045] Example 1

[0046] When the pH detection and adjustment system for flunixin synthesis is working, firstly, two reactants, solid and liquid, required for the synthesis of flunixin (wherein the solid phase raw material needs to be excessive so that the liquid phase material is completely converted) are put into the reactor 1 from the reactant inlet 111. After the reactants are added, the reactant inlet 111 is closed, the motor 11 is started, and the motor 11 drives the stirring device 12 to stir the reaction materials. When the reaction is completed, that is, the reaction time reaches the calculated reaction completion time, the material in the reactor 1 is still a mixture of solid and liquid phases, wherein the solid phase material is the solid raw material that has not reacted completely, and the liquid phase material is the generated product. At this time, the third valve 19 located at the product outlet 15 is opened, and the filter device 2, the circulation pump 3 and the pH detection device 4 connected after the third valve 19 are opened at the same time.

[0047] The material after the reaction is completed flows out from the product outlet 15 and reaches the filter device 2 through the third valve 19. The filter device 2 separates the solid material in the material, and the remaining liquid material reaches the pH detection device 4 under the transportation of the circulation pump 3. The pH detection device 4 detects the pH of the liquid material from the reactor 1. After the detection is completed, the material re-enters the reactor 1 from the reflux liquid inlet 14. At the same time, the opening and time of the first valve 17 are controlled according to the detection results, so that a certain amount of pH adjuster enters the reactor 1 from the pH adjuster storage tank 16 through the pH adjuster inlet 13 to adjust the pH value of the material therein. During the pH value adjustment process, the motor 11 continuously drives the stirring device 12 to stir, so that the pH adjuster can be fully mixed with the material.

[0048] When the pH detection device 4 detects that the pH value of the material reaches the preset value, the first valve 17 is closed and the addition of the pH adjuster is stopped. At the same time, the motor 11 and the third valve 19, as well as the related equipment after the third valve 19, are closed. The second valve 18 is opened, and the material flows out from the product outlet 15 and enters the next process section through the second valve 18.

[0049] Example 2

[0050] On the basis of Example 1, Example 2 provides a structure and working process for cleaning the pH analyzer 41 and automatically controlling the system: when the pH value is detected, the fourth valve 42 and the fifth valve 43 are opened, and the two sixth valves 47 between the pH analyzer 41 and the cleaning agent storage tank 44 and the cleaning agent recovery tank 45 remain closed. At this time, a loop is formed between the product outlet 15, the filter device 2, the circulation pump 3, the pH analyzer 41 and the reflux liquid inlet 14, so that the pH analyzer 41 can continuously detect the pH value of the material in the reactor 1. When the pH value of the material is adjusted, when the pH analyzer 41 needs to be cleaned, the fourth valve 42 and the fifth valve 43 are closed, and the two sixth valves 47 and the water suction pump 46 are opened, so that the cleaning agent in the cleaning agent storage tank 44 continuously flows through the pH analyzer 41, thereby completing the flushing of the pH analyzer 41. The cleaning agent finally flows to the cleaning agent recovery tank 45 for recovery. After flushing is completed, the sixth valve 47 between the pH analyzer 41 and the cleaning agent storage tank 44 is closed, so that the water suction pump 46 can suck all the cleaning agent in the pipeline into the cleaning agent recovery tank 45 as much as possible, thereby avoiding the cleaning agent from contaminating the material.

[0051] When the pH value of the material needs to be detected, the controller 48 controls the second valve 18 to close and the third valve 19 to open, and the pH analyzer 41 transmits the measured pH value of the material to the controller 48. When the pH value needs to be adjusted, the controller 48 controls the opening of the first valve 17 according to the pH value measured by the pH analyzer 41. When the pH value of the material is adjusted to the target value, the controller 48 controls the first valve 17 to close, and controls the second valve 18 to open and the third valve 19 to close. The controller 48 controls the opening and switch of the first valve 17, the second valve 18 and the third valve 19, which reduces the manual work intensity and improves the accuracy of the system operation.

[0052] Example 3

[0053] Embodiment 3 provides a device structure for improving the mixing degree of the material and the pH adjuster in the reactor 1: the upper spiral stirring blade 122 and the lower spiral stirring blade 123 with opposite spiral directions are symmetrically arranged on the driving rod 121. When stirring the material, by controlling the rotation direction of the output end of the motor 11, the upper spiral stirring blade 122 transfers the material in the reactor 1 from top to bottom, and the lower spiral stirring blade 123 transfers the material in the reactor 1 from bottom to top, thereby strengthening the turbulence degree of the material in the axial direction, thereby improving the mixing degree between the pH adjuster and the material, and improving the work efficiency.

[0054] The multiple radial stirring blades 124 arranged between the upper spiral stirring blade 122 and the lower spiral stirring blade 123 have high shear force and diffusion capacity during operation, and can efficiently transfer the upper spiral stirring blade 122 and the lower spiral stirring blade 123 to the material in the middle for radial mixing. At the same time, the U-shaped agitator 126 on the sleeve 125 connected to the bottom of the driving rod 121 can generate horizontal circulation during stirring. The synergistic effect between the above multiple structures greatly improves the work efficiency of adjusting the pH value of the material. The bottom shape of the U-shaped agitator 126 is consistent with the bottom shape of the reactor 1, so that when stirring, the material deposited at the bottom of the reactor 1 can be brought up to improve the mixing degree between the materials. The two side rods of the U-shaped agitator 126 are in contact with the inner wall of the reactor 1. During rotation and stirring, the material attached to the side wall of the reactor 1 can be scraped off to further improve the mixing degree of the material.

[0055] The U-shaped agitator 126 is provided with a transverse rod 127 and a longitudinal rod 128, which not only increases the degree of stirring and mixing, but also improves the strength of the U-shaped agitator 126 and increases its service life.

[0056] Example 4

[0057] Embodiment 4 also provides a device structure and a use process for filtering materials: when filtering materials, i.e., solid-liquid separation, the materials enter the screw conveyor 21 from the material inlet 25 opened above the inclined lower end of the housing 22. After the solid-liquid mixed materials enter the screw conveyor 21, most of the liquid materials are filtered out of the solid materials therein by the filter plate 29, and then flow out from the liquid outlet 26 opened below the inclined lower end of the housing 22. The remaining liquid materials and solid materials are transferred to the inclined upper end of the housing 22 under the conveyance of the spiral shaft 24.

[0058] During the material conveying process of the spiral shaft 24, the solid material gradually transfers to the inclined upper end of the shell 22, and after reaching the inclined upper end, flows out from the solid outlet 27 and is collected. During the transfer process, the liquid material flows down from the multiple filter holes opened on the spiral blades of the spiral shaft 24, and finally flows out from the liquid outlet 26 at the inclined lower end. A bracket 28 for support is also installed on the shell 22.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pH detection and adjustment system for flunixin synthesis, characterized in that: It comprises a reactor (1), wherein a motor (11) is arranged at the center of the top of the reactor (1), and the output end of the motor (11) is connected to a stirring device (12) penetrating the top of the reactor (1); A pH adjusting agent inlet (13) and a reflux liquid inlet (14) are respectively provided on both sides of the motor (11), a reactant inlet (111) is also provided between the pH adjusting agent inlet (13) and the motor (11), and a product outlet (15) is also provided at the bottom of the reactor (1); The pH adjusting agent inlet (13) is connected to a pH adjusting agent storage tank (16), a first valve (17) is installed between the pH adjusting agent inlet (13) and the pH adjusting agent storage tank (16), the product outlet (15) is connected to a second valve (18) and a third valve (19) connected in parallel with each other, the third valve (19) is connected in sequence along the material flow direction to a filtering device (2), a circulation pump (3) and a pH detection device (4), and the outlet of the pH detection device (4) is connected to the reflux liquid inlet (14).

2. The pH detection and adjustment system for flunixin synthesis according to claim 1, characterized in that: The pH detection device (4) comprises a pH analyzer (41) located between the circulation pump (3) and the reflux liquid inlet (14); A fourth valve (42) is installed between the circulation pump (3) and the pH analyzer (41), and a fifth valve (43) is installed between the reflux liquid inlet (14) and the pH analyzer (41); A cleaning agent storage tank (44) is connected between the pH analyzer (41) and the fourth valve (42) via a pipeline, a cleaning agent recovery tank (45) is connected between the pH analyzer (41) and the fifth valve (43) via a pipeline, and a water suction pump (46) is provided on the pipeline between the cleaning agent recovery tank (45) and the pH analyzer (41); A sixth valve (47) is provided on the inlet pipe of the water suction pump (46) and the outlet pipe of the cleaning agent storage tank (44), respectively.

3. The pH detection and adjustment system for flunixin synthesis according to claim 2, characterized in that: The pH analyzer (41), the first valve (17), the second valve (18) and the third valve (19) are electrically connected to a controller (48).

4. The pH detection and adjustment system for flunixin synthesis according to claim 1, characterized in that: The stirring device (12) comprises a driving rod (121) that passes through the top of the reactor (1) and is directly connected to the motor (11), and a plurality of radial stirring blades (124) are mounted on the driving rod (121); upper spiral stirring blades (122) and lower spiral stirring blades (123) connected to the driving rod (121) are symmetrically arranged on the upper and lower sides of the radial stirring blades (124); The bottom of the driving rod (121) is fixedly connected to a sleeve (125), and the sleeve (125) is connected to a U-shaped stirrer (126).

5. The pH detection and adjustment system for flunixin synthesis according to claim 4, characterized in that: The bottom shape of the U-shaped agitator (126) matches the bottom shape of the reactor (1), and the two side rods of the U-shaped agitator (126) fit the inner wall of the reactor (1); a cross bar (127) is connected between the two side rods of the U-shaped agitator (126) and the driving rod (121), and a longitudinal bar (128) is connected between the cross bar (127) and the bottom of the U-shaped agitator (126).

6. The pH detection and adjustment system for flunixin synthesis according to claim 4, characterized in that: The length of the radial stirring blade (124) is greater than the spiral radius of the upper spiral stirring blade (122) and the lower spiral stirring blade (123).

7. The pH detection and adjustment system for flunixin synthesis according to claim 1, characterized in that: The filtering device (2) comprises an inclined screw conveyor (21), the screw conveyor (21) comprising a housing (22), a second motor (23) being mounted on the inclined upper end of the housing, and an output end of the second motor (23) being connected to a screw shaft (24) inside the housing (22); A material inlet (25) is provided above the inclined lower end of the shell (22), a liquid outlet (26) is provided below the inclined lower end, and a solid outlet (27) is provided at the bottom of the inclined upper end of the shell (22); the material inlet (25) is connected to the third valve (19), and the liquid outlet (26) is connected to the circulation pump (3); a bracket (28) for support is also installed on the shell (22); A filter plate (29) is also installed at the connection between the liquid outlet (26) and the housing (22).

8. The pH detection and adjustment system for flunixin synthesis according to claim 7, characterized in that: A plurality of filter holes are evenly arranged on the spiral sheet of the spiral rotating shaft (24).

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