A concentration device for methoxyacetic acid production

Abstract

The application relates to a concentration device for methoxyacetic acid preparation and relates to the technical field of methoxyacetic acid preparation, which comprises a concentration barrel, a spraying assembly, a collecting assembly, an evaporation assembly and a detection assembly. One side top of the concentration barrel is communicated with a liquid inlet pipe, the spraying assembly is arranged in the concentration barrel, the liquid inlet pipe is communicated with the spraying assembly, and the spraying assembly is used for spraying a solution needing to be concentrated into the concentration barrel. The collecting assembly is arranged at the bottom of the concentration barrel and is used for collecting the concentrated solution. A lead screw is fixedly arranged at the center of the bottom in the concentration barrel, the lead screw is a reciprocating lead screw, the lead screw is vertically arranged and coaxially arranged with the concentration barrel. A rotating block is spirally transmission-connected with the lead screw in the vertical direction. The evaporation assembly is used for contacting steam with the sprayed solution, so that the solvent in the solution is evaporated together. The detection assembly can assist in detecting the concentrated solution. The concentration device for methoxyacetic acid preparation can realize an efficient evaporation and concentration process.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of methoxyacetic acid preparation, in particular to a concentration device for methoxyacetic acid preparation. BACKGROUND

[0002] The concentration device plays a crucial role in chemical production, especially in the preparation process of methoxyacetic acid. As an important organic solvent and intermediate, methoxyacetic acid has a wide range of applications in medicine, pesticides, dyes and other fields. With the acceleration of industrialization process, the demand for concentration devices is also increasing, not only requiring high concentration capacity, but also requiring simple operation and convenient maintenance to meet the requirements of large-scale production and high-quality products.

[0003] At present, common methoxyacetic acid concentration devices mainly include kettle evaporators, thin film evaporators and multi-effect evaporators. The kettle evaporator is the most traditional way, which directly heats the volatile components in the solution to evaporate and achieve concentration. The thin film evaporator sets a rotating scraper in the cylinder, uses centrifugal force to form a thin layer of solution, and quickly evaporates through the heating of the heat medium. The multi-effect evaporator improves energy utilization and reduces energy consumption through multiple evaporation.

[0004] However, the existing concentration device still faces some challenges in actual use. The unreasonable design of the spray system leads to uneven distribution of the solution in the concentration barrel, affecting the concentration effect. The stability of the steam supply system is insufficient, which cannot guarantee continuous and efficient evaporation process. These problems seriously affect the working efficiency of the concentration device and the quality of the final product, and an improved concentration device is urgently needed to overcome these defects. SUMMARY

[0005] In order to overcome the above technical problems, the application provides a concentration device for methoxyacetic acid preparation.

[0006] The concentration device for methoxyacetic acid preparation provided by the application adopts the following technical scheme:

[0007] A concentration device for methoxyacetic acid preparation, comprising a concentration barrel, a spray assembly, a collection assembly and an evaporation assembly, one side of the top of the concentration barrel is communicated with a liquid inlet pipe, the spray assembly is arranged in the concentration barrel, the liquid inlet pipe is communicated with the spray assembly, and the spray assembly is used for spraying the solution to be concentrated into the concentration barrel; the collection assembly is arranged at the bottom of the concentration barrel and is used for collecting the concentrated solution; a lead screw is fixedly arranged at the center of the bottom of the concentration barrel, the lead screw is a reciprocating lead screw, the lead screw is vertically arranged and coaxially arranged with the concentration barrel; a rotating block is spirally connected with the lead screw in the vertical direction; an air inlet hole is formed at the center of the top of the concentration barrel;

[0008] The evaporation assembly comprises an air inlet pipe, an air outlet pipe, a connecting pipe, an extension pipe, a gas conveying pipe, a steam ring pipe and steam pipes; the air inlet pipe is fixedly connected with the top surface of the concentration barrel and communicates with the air inlet hole; the air outlet pipe communicates with the top of the side wall on one side of the concentration barrel; the connecting pipe is L-shaped, the top end of the connecting pipe is rotationally connected with the inner wall of the air inlet hole, and the connecting pipe communicates with the air inlet pipe; the end of the connecting pipe away from the air inlet hole is fixedly connected with the top end of the extension pipe, the extension pipe is vertically arranged, and the bottom end of the extension pipe is fixedly connected with the gas conveying pipe; the gas conveying pipe is horizontally arranged, one end of the gas conveying pipe is fixedly connected with the rotating block, and the other end is fixedly connected with the steam ring pipe; the steam ring pipe is coaxially arranged with the lead screw, the steam pipes are provided in plurality, the plurality of steam pipes are fixedly connected with the top of the steam ring pipe, the steam pipes are obliquely arranged, and the plurality of steam pipes are circumferentially arranged with the axial center of the steam ring pipe as the array axial center.

[0009] By adopting the above technical scheme, the methoxy acetic acid preparation concentration device can realize efficient evaporation and concentration process. Specifically, the concentration barrel provides structural support for the concentration process; the spray assembly and the liquid inlet pipe are arranged, so that the solution to be concentrated can enter the concentration barrel through the liquid inlet pipe and be placed in the spray assembly, and then be sprayed by the spray assembly; the arrangement of the collection assembly facilitates the timely collection of the concentrated solution, ensuring the continuity of production and the quality of the product; the combination of the lead screw and the rotating block realizes the up-down movement of the gas conveying pipe and its connecting parts, so that the steam can more effectively cover the solution in the entire concentration barrel, avoiding local overheating or cold spot phenomenon, and improving the overall concentration efficiency; through the arrangement of the air inlet pipe, high-temperature steam can enter the concentration barrel through the air inlet pipe; through the arrangement of the air outlet pipe, after the solution in the concentration barrel is contacted with the high-temperature steam, the steam and the evaporated solvent can be discharged outside the concentration barrel through the air outlet pipe; through the arrangement of the connecting pipe, high-temperature steam can enter the connecting pipe through the air inlet pipe; through the arrangement of the extension pipe, high-temperature steam can enter the extension pipe from the connecting pipe; through the arrangement of the steam ring pipe, high-temperature steam can enter the steam ring pipe from the extension pipe; through the oblique arrangement and circumferential array arrangement of the steam pipes, the steam can enter the concentration barrel from the steam ring pipe through the steam pipes, and at the same time, the steam gives the steam ring pipe an opposite force parallel to the oblique direction of the steam pipes, driving the steam ring pipe to rotate, the steam ring pipe rotating drives the gas conveying pipe to rotate, the gas conveying pipe driving the extension pipe and the rotating block to rotate, the rotating block rotating while reciprocating in the vertical direction on the lead screw, thereby driving the gas conveying pipe and the steam ring pipe to reciprocate in the vertical direction while rotating, driving the extension pipe to perform the cycle movement of elongation and shortening, so that the steam in the steam ring pipe can be uniformly discharged into the concentration barrel through the steam pipes, and fully contacted with the sprayed solution.

[0010] In summary, the concentration device not only has a compact and reasonable structure, but also is easy to operate, and significantly improves the concentration efficiency and product purity of methoxyacetic acid.

[0011] Optionally, the steam ring pipes are provided in plurality, the plurality of steam ring pipes are fixedly connected with the gas conveying pipe and communicate with the gas conveying pipe, the plurality of steam ring pipes are coaxially arranged, and each steam ring pipe is fixedly connected with a plurality of steam pipes arranged obliquely at the top.

[0012] By adopting the above technical scheme, the design of multiple steam ring pipes enables steam to be more uniformly distributed inside the concentration barrel, thereby improving the heating efficiency and evaporation rate of the solution. Meanwhile, the arrangement of multiple layers of steam ring pipes increases the opportunity for steam to contact the solution, further improving the concentration effect. In addition, the obliquely arranged steam pipes on each steam ring pipe can drive the corresponding steam ring pipe to rotate, ensuring that steam is more effectively covered to the surface of the solution, improving the heat and mass transfer efficiency, shortening the concentration time, ensuring the uniform distribution of steam inside the entire concentration barrel, and further enhancing the evaporation effect.

[0013] Optionally, the spray assembly comprises a lower liquid tray, the side wall of the lower liquid tray is fixedly connected with the inner wall top of the concentration barrel, the liquid inlet pipe communicates with the lower liquid tray, the cross section of the lower liquid tray is circular, the lower liquid tray is horizontally arranged and coaxially arranged with the concentration barrel, a plurality of lower liquid holes are arranged on the bottom surface of the lower liquid tray, and each lower liquid hole is provided below a spray head fixedly connected with the bottom surface of the lower liquid tray.

[0014] By adopting the above technical scheme, the design of the spray assembly enables the solution to be uniformly distributed inside the concentration barrel, improving the spraying efficiency and coverage area, thereby enhancing the evaporation effect of the solution. Specifically, the lower liquid tray is fixedly connected with the inner wall top of the concentration barrel, ensuring the structural stability and sealing performance; the liquid inlet pipe communicates with the lower liquid tray, ensuring the smooth entry of the solution into the lower liquid tray; the cross section of the lower liquid tray is circular and horizontally arranged coaxially with the concentration barrel, enabling the solution to be uniformly dispersed to each spray head under the action of gravity; the plurality of uniformly distributed lower liquid holes cooperate with the corresponding spray head design, further improving the atomization effect of the solution, increasing the opportunity for the solution to contact the heat source, accelerating the evaporation speed, and improving the concentration efficiency. The design of the spray assembly enables the solution to form fine droplets when entering the concentration barrel, increasing the surface area of the solution in contact with steam, thereby improving the mass transfer efficiency.

[0015] Optionally, the lower liquid tray is annular, a communication port is arranged in the middle of the lower liquid tray, the lower section of the connecting pipe is located in the communication port, and the top end of the telescopic pipe is also located in the communication port.

[0016] By adopting the technical scheme, the annular design of the lower liquid tray can ensure uniform dispersion of the solution into the concentration barrel, improving the spraying effect. Meanwhile, the communication port provided in the middle of the lower liquid tray provides installation space for the connecting pipe and the telescopic pipe.

[0017] Optionally, a collecting groove is provided on the bottom surface of the concentration barrel.

[0018] By adopting the technical scheme, the collecting groove provided on the bottom surface of the concentration barrel can effectively collect the concentrated solution, avoiding the solution from scattering at the bottom of the concentration barrel, and improving the collection efficiency and the solution recovery rate.

[0019] Optionally, the collecting groove is located on one side of the bottom surface of the concentration barrel, and the bottom surface of the concentration barrel is inclined, with the collecting groove located on the low side of the bottom surface of the concentration barrel.

[0020] By adopting the technical scheme, the collecting groove is located on one side of the bottom surface of the concentration barrel, and the bottom surface of the concentration barrel is inclined, so that the concentrated solution can flow smoothly into the collecting groove on the low side, effectively preventing the solution from remaining at the bottom of the concentration barrel, and improving the solution collection efficiency and the cleanliness of the device.

[0021] Optionally, the collecting assembly includes a collecting pipe, a collecting pump and a collecting valve, the collecting pipe is in communication with the collecting groove, the collecting pump is arranged on the collecting pipe, and the collecting valve is also arranged on the collecting pipe and located between the collecting pump and the collecting groove.

[0022] By adopting the technical scheme, the collecting assembly can efficiently transfer the concentrated solution out of the concentration barrel. Specifically, the communication design of the collecting pipe and the collecting groove ensures that the solution can flow smoothly into the collecting pipe, and the collecting pump can provide the necessary power to quickly and smoothly discharge the solution from the concentration barrel. Meanwhile, the collecting valve can be closed to prevent the solution from leaking or flowing backward when needed, thereby ensuring the stability and safety of the entire system.

[0023] Optionally, a detection assembly is further included, the detection assembly includes a detection pipe and a detection valve, the detection pipe is also in communication with the collecting groove, and the detection valve is arranged on the detection pipe.

[0024] By adopting the technical scheme, the addition of the detection assembly enables real-time monitoring of the solution concentration during the concentration process, ensuring that the concentration effect reaches the expected standard. Specifically, the detection pipe is in communication with the collecting groove, which can timely collect the sample of the concentrated solution, and the detection valve controls the opening and closing of the detection pipe, facilitating the sampling and analysis of the operating personnel, thereby effectively avoiding product quality problems caused by improper solution concentration.

[0025] Optionally, the collection pipe is provided with a first three-way valve, and the liquid inlet pipe is provided with a second three-way valve, and the first three-way valve and the second three-way valve are communicated by a liquid return pipe.

[0026] By adopting the above technical scheme, the arrangement of the first three-way valve and the second three-way valve enables the solution to be flexibly circulated between the collection pipe and the liquid inlet pipe. Specifically, when some solution in the concentration process fails to reach the expected concentration, it can be re-fed into the concentration barrel for further processing through the liquid return pipe, thereby improving the concentration efficiency and product quality. At the same time, this design reduces solution waste and ensures effective use of resources in the production process.

[0027] Optionally, the top end of the lead screw is provided with a limit block.

[0028] By adopting the above technical scheme, the arrangement of the limit block can effectively prevent the rotating block from moving beyond the predetermined range on the lead screw, avoiding equipment failure or damage due to excessive lifting or lowering, thereby improving the safety and stability of the equipment operation.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. The design of the steam ring pipe and multiple inclined steam pipes enables the steam to be more stably delivered to each area inside the concentration barrel, improving the evaporation efficiency and ensuring a continuous and efficient evaporation process. Specifically, the steam discharged from the steam pipe drives the rotation of the steam ring pipe, which in turn drives the rotation of the gas delivery pipe, and the rotating block moves up and down on the lead screw, thereby driving the vertical movement of the gas delivery pipe, the steam ring pipe and the multiple steam pipes on it, achieving uniform distribution of steam in the entire concentration barrel. This dynamic steam supply method not only avoids the problem of heat concentration caused by a single inlet, but also ensures that every corner can be fully heated, making the evaporation process more efficient and uniform. In addition, the arrangement of multiple steam ring pipes further enhances this effect, ensuring temperature balance in a large area and greatly improving the evaporation rate and energy utilization rate.

[0031] 2. The spraying assembly uniformly sprays the solution into the concentration barrel, specifically including a liquid inlet disc and multiple evenly distributed spray heads. The side wall of the liquid inlet disc is fixedly connected to the top of the inner wall of the concentration barrel, ensuring that the solution can be uniformly dispersed in the entire barrel when entering the concentration barrel. This design not only solves the problem of uneven distribution of solution in the prior art, but also significantly improves the concentration efficiency and product quality. In this way, the solution can maintain good fluidity and uniformity during the concentration process, thereby better promoting the evaporation process, reducing local overheating, and prolonging the service life of the equipment.

[0032] 3. The design of the collection tank and the collection assembly, especially the inclined structure of the bottom surface of the concentration barrel, facilitates the smooth flow of the concentrated solution into the collection tank and the timely discharge by the collection pump, avoiding the problem of adhesion of the concentrate on the container wall and improving the solution collection rate. The collection tank is located at the low side of the bottom surface of the concentration barrel, and the bottom surface of the concentration barrel is inclined, which can maximize the reduction of concentrate residue and prevent the solution from adhering to the barrel wall, causing waste or difficulty in cleaning. At the same time, the collection pipe, collection pump and collection valve in the collection assembly work cooperatively to ensure that the solution can be quickly and cleanly discharged from the concentration barrel after concentration, reducing the risk of secondary pollution and improving the reliability and efficiency of the overall process. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0034] Figure 2 is a schematic diagram of the longitudinal cross-sectional structure of the embodiment of the present application.

[0035] Reference signs: 1, concentration barrel; 11, air inlet hole; 12, collection tank; 2, spraying assembly; 21, lower liquid tray; 22, lower liquid hole; 23, spray head; 24, communication port; 3, collection assembly; 31, collection pipe; 32, collection pump; 33, collection valve; 34, first three-way valve; 4, evaporation assembly; 41, air inlet pipe; 42, air outlet pipe; 43, connecting pipe; 44, telescopic pipe; 45, gas conveying pipe; 46, steam ring pipe; 47, steam pipe; 5, detection assembly; 51, detection pipe; 52, detection valve; 6, liquid inlet pipe; 61, second three-way valve; 7, lead screw; 71, rotating block; 8, liquid return pipe; 9, limiting block. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying Figures 1-2 The present application will be further described in detail.

[0037] The embodiment of the present application discloses a concentration device for preparing methoxyacetic acid. Referring to Figure 1 and Figure 2The application discloses a concentration device for methoxyacetic acid preparation, which comprises a concentration barrel 1, a spraying assembly 2, a collecting assembly 3, an evaporation assembly 4 and a detection assembly 5. The concentration barrel 1 is provided with a liquid inlet pipe 6 at the top of one side, the spraying assembly 2 is arranged in the concentration barrel 1, the liquid inlet pipe 6 is communicated with the spraying assembly 2, and the spraying assembly 2 is used for spraying the solution needing to be concentrated into the concentration barrel 1. The collecting assembly 3 is arranged at the bottom of the concentration barrel 1 and used for collecting the concentrated solution. A screw rod 7 is fixedly arranged at the center of the bottom in the concentration barrel 1, the screw rod 7 is a reciprocating screw rod, the screw rod 7 is vertically arranged and coaxially arranged with the concentration barrel 1. A rotating block 71 is spirally and vertically connected with the screw rod 7, the rotating block 71 is provided with a sliding block, through the rotation of the rotating block 71, the sliding block arranged in the screw groove is pushed to make axial reciprocating motion by the side of the screw groove of the screw rod 7. The evaporation assembly 4 is used for contacting the steam with the sprayed solution, so that the solvent in the solution is evaporated. The detection assembly 5 can assist in detecting the concentrated solution. The concentration device for methoxyacetic acid preparation can realize efficient evaporation and concentration process.

[0038] With reference to Figure 1 and Figure 2 , the top center of the concentration barrel 1 is provided with an air inlet hole 11. The evaporation assembly 4 comprises an air inlet pipe 41, an air outlet pipe 42, a connecting pipe 43, an extension pipe 44, a gas conveying pipe 45, a steam ring pipe 46 and a steam pipe 47. The air inlet pipe 41 is fixedly connected with the top surface of the concentration barrel 1 and communicated with the air inlet hole 11. The air outlet pipe 42 is communicated with the top of the side wall of one side of the concentration barrel 1. The connecting pipe 43 is L-shaped, the top end of the connecting pipe 43 is rotatably connected with the inner wall of the air inlet hole 11, and the connecting pipe 43 is communicated with the air inlet pipe 41.

[0039] With reference to Figure 1 and Figure 2 , the end, away from the air inlet hole 11, of the connecting pipe 43 is fixedly connected with the top end of the extension pipe 44, the extension pipe 44 is vertically arranged, the bottom end of the extension pipe 44 is fixedly connected with the gas conveying pipe 45, and the bottom end of the extension pipe 44 is communicated with the gas conveying pipe 45. The gas conveying pipe 45 is horizontally arranged, one end of the gas conveying pipe 45 is fixedly connected with the rotating block 71, the other end is fixedly connected with the steam ring pipe 46, the gas conveying pipe 45 is communicated with the steam ring pipe 46. The steam ring pipe 46 is coaxially arranged with the screw rod 7. The steam pipe 47 is provided with a plurality of steam pipes 47, the plurality of steam pipes 47 are fixedly connected with the top of the steam ring pipe 46 and communicated with the steam ring pipe 46, the steam pipe 47 is obliquely arranged, and the plurality of steam pipes 47 are circumferentially arranged with the axis of the steam ring pipe 46 as the array axis. As an embodiment not shown, a plurality of circumferentially arranged steam pipes 47 are also fixedly connected below the steam ring pipe 46. When the steam is discharged from the steam ring pipe 46, the steam can be discharged through the steam pipes 47 above and below at the same time, so that greater rotating force can be given to the steam ring pipe 46.

[0040] In operation, the solution enters the spraying assembly 2 through the liquid inlet pipe 6 and is sprayed into the concentration barrel 1 through the spraying assembly 2; the high-temperature steam enters the connecting pipe 43 through the gas inlet pipe 41, enters the telescopic pipe 44 through the connecting pipe 43, enters the gas conveying pipe 45 through the telescopic pipe 44, enters the steam ring pipe 46 through the gas conveying pipe 45, and is discharged from the steam ring pipe 46 into the concentration barrel 1 through the steam pipe 47; the steam is discharged from the steam pipe 47 while giving the steam ring pipe 46 an opposite force parallel to the inclined direction of the steam pipe 47, driving the steam ring pipe 46 to rotate; the rotation of the steam ring pipe 46 drives the gas conveying pipe 45 to rotate, and the gas conveying pipe 45 drives the telescopic pipe 44 and the rotating block 71 to rotate; the rotating block 71 rotates while reciprocating in the vertical direction on the lead screw 7, thereby driving the gas conveying pipe 45 and the steam ring pipe 46 to reciprocate in the vertical direction while rotating, driving the telescopic pipe 44 to perform a cycle of elongation and shortening, and enabling the steam in the steam ring pipe 46 to be uniformly discharged into the concentration barrel 1 through the steam pipe 47 to fully contact the sprayed solution; part of the solvent in the solution evaporates after contacting the steam and is discharged through the exhaust pipe 42, and the concentrated solution enters the collection assembly 3.

[0041] With reference to Figure 1 and Figure 2 , the steam ring pipe 46 is provided with a plurality of steam ring pipes 46, which are fixedly connected with and communicate with the gas conveying pipe 45, and are coaxially arranged; each steam ring pipe 46 is fixedly connected with a plurality of steam pipes 47 arranged obliquely at the top. The design of the plurality of steam ring pipes 46 enables the steam to be more uniformly distributed inside the concentration barrel 1, thereby improving the heating efficiency and evaporation rate of the solution. At the same time, the arrangement of the plurality of steam ring pipes 46 increases the opportunity for the steam to contact the solution, further improving the concentration effect. In addition, the obliquely arranged steam pipes 47 on each steam ring pipe 46 can drive the corresponding steam ring pipe 46 to rotate, ensuring that the steam more effectively covers the surface of the solution, improving the heat and mass transfer efficiency, shortening the concentration time, ensuring the uniform distribution of the steam inside the entire concentration barrel 1, and further enhancing the evaporation effect.

[0042] With reference to Figure 1 and Figure 2 , the spraying assembly 2 comprises a liquid pan 21, the side wall of the liquid pan 21 is fixedly connected with the inner wall top of the concentration barrel 1, the liquid inlet pipe 6 communicates with the liquid pan 21, the cross section of the liquid pan 21 is circular, the liquid pan 21 is horizontally arranged and coaxially arranged with the concentration barrel 1, a plurality of liquid holes 22 are arranged on the bottom surface of the liquid pan 21, and each liquid hole 22 is provided below with a spray head 23 fixedly connected with the bottom surface of the liquid pan 21.

[0043] The design of the spraying assembly 2 enables the solution to be uniformly distributed inside the concentration barrel 1, improves the spraying efficiency and coverage area, and thus enhances the evaporation effect of the solution. Specifically, the lower liquid plate 21 is fixedly connected with the top of the inner wall of the concentration barrel 1, ensuring the structural stability and sealing performance; the liquid inlet pipe 6 is in communication with the lower liquid plate 21, ensuring the smooth entry of the solution into the lower liquid plate 21; the cross section of the lower liquid plate 21 is circular and horizontally arranged and coaxially arranged with the concentration barrel 1, so that the solution can be uniformly dispersed to each spray head 23 under the action of gravity; the plurality of uniformly distributed lower liquid holes 22 cooperate with the corresponding spray heads 23, further improving the atomization effect of the solution, increasing the contact opportunity of the solution with the heat source, accelerating the evaporation speed, and improving the concentration efficiency. The design of the spraying assembly 2 enables the solution to form fine droplets when entering the concentration barrel 1, increasing the surface area of the solution in contact with the steam, thereby improving the mass transfer efficiency.

[0044] With reference to Figure 1 and Figure 2 , the lower liquid plate 21 is annular, a communication opening 24 is formed in the middle of the lower liquid plate 21, the lower segment of the connecting pipe 43 is located in the communication opening 24, and the top end of the telescopic pipe 44 is also located in the communication opening 24. The annular design of the lower liquid plate 21 can ensure that the solution is uniformly dispersed inside the concentration barrel 1, improving the spraying effect. At the same time, the communication opening 24 formed in the middle of the lower liquid plate 21 provides installation space for the connecting pipe 43 and the telescopic pipe 44.

[0045] With reference to Figure 1 and Figure 2 , a collection groove 12 is formed on the bottom surface inside the concentration barrel 1. It can effectively collect the concentrated solution, avoid the solution from scattering at the bottom of the concentration barrel 1, and improve the collection efficiency and solution recovery rate. The collection groove 12 is located on one side of the bottom surface inside the concentration barrel 1, the bottom surface inside the concentration barrel 1 is inclined, and the collection groove 12 is located on the low side of the bottom surface inside the concentration barrel 1. The concentrated solution can flow smoothly into the collection groove 12 on the low side, effectively preventing the solution from remaining at the bottom of the concentration barrel 1, and improving the solution collection efficiency and the cleanliness of the device.

[0046] With reference to Figure 1 and Figure 2 , the collection assembly 3 includes a collection pipe 31, a collection pump 32, and a collection valve 33. The collection pipe 31 is in communication with the collection groove 12, the collection pump 32 is arranged on the collection pipe 31, and the collection valve 33 is also arranged on the collection pipe 31 and located between the collection pump 32 and the collection groove 12. The communication design of the collection pipe 31 and the collection groove 12 ensures that the solution can flow smoothly into the collection pipe 31, and the collection pump 32 can provide the necessary power to make the solution quickly and smoothly flow out of the concentration barrel 1. At the same time, the collection valve 33 can close the collection pipe 31 when needed, preventing the solution from leaking or flowing backward, thereby ensuring the stability and safety of the entire system.

[0047] With reference toFigure 1 And Figure 2 The detection assembly 5 comprises a detection pipe 51 and a detection valve 52, the detection pipe 51 also communicates with the collection tank 12, and the detection valve 52 is arranged on the detection pipe 51. The addition of the detection assembly 5 enables the concentration of the solution in the concentration process to be monitored in real time, ensuring that the concentration effect reaches the expected standard. Specifically, the detection pipe 51 communicates with the collection tank 12 and can collect a sample of the concentrated solution in time, and the detection valve 52 controls the opening and closing of the detection pipe 51, facilitating sampling and analysis by the operator, thereby effectively avoiding product quality problems caused by improper solution concentration.

[0048] With reference to Figure 1 And Figure 2 The first three-way valve 34 is arranged on the collection pipe 31, the second three-way valve 61 is arranged on the liquid inlet pipe 6, and the liquid return pipe 8 is arranged in communication between the first three-way valve 34 and the second three-way valve 61. The arrangement of the first three-way valve 34 and the second three-way valve 61 enables the solution to flow flexibly between the collection pipe 31 and the liquid inlet pipe 6. Specifically, when some of the solutions in the concentration process fail to reach the expected concentration, they can be sent back into the concentration barrel 1 through the liquid return pipe 8 for reprocessing, thereby improving the concentration efficiency and product quality. At the same time, this design reduces solution waste and ensures effective use of resources during production.

[0049] With reference to Figure 1 And Figure 2 The top end of the lead screw 7 is provided with a limit block 9. The arrangement of the limit block 9 can effectively prevent the movement of the rotating block 71 on the lead screw 7 from exceeding the predetermined range, avoiding equipment failure or damage caused by excessive rising or falling, thereby improving the safety and stability of the equipment operation.

[0050] The implementation principle of the concentration device for preparing methoxyacetic acid according to the embodiment of the application is as follows:

[0051] When working, the solution enters the lower liquid pan 21 through the liquid inlet pipe 6, and is sprayed into the concentration barrel 1 through the lower liquid hole 22 and the spray head 23; the high-temperature steam enters the connecting pipe 43 through the gas inlet pipe 41, enters the telescopic pipe 44 through the connecting pipe 43, enters the gas conveying pipe 45 through the telescopic pipe 44, enters the steam ring pipe 46 through the gas conveying pipe 45, and is discharged from the steam ring pipe 46 into the concentration barrel 1 through the steam pipe 47; the steam discharged from the steam pipe 47 gives the steam ring pipe 46 an opposite force parallel to the inclined direction of the steam pipe 47 at the same time, drives the steam ring pipe 46 to rotate, the rotation of the steam ring pipe 46 drives the gas conveying pipe 45 to rotate, the gas conveying pipe 45 drives the telescopic pipe 44 and the rotating block 71 to rotate, the rotating block 71 rotates while reciprocating in the vertical direction on the lead screw 7, so that the gas conveying pipe 45 and the steam ring pipe 46 also reciprocate in the vertical direction while rotating, the telescopic pipe 44 is driven to perform the cycle movement of lengthening and shortening, so that the steam in the steam ring pipe 46 can be uniformly discharged into the concentration barrel 1 through the steam pipe 47 and fully contacted with the sprayed solution; part of the solvent in the solution evaporates after being contacted with the steam and is discharged through the exhaust pipe 42, and the concentrated solution enters the collection tank 12.

[0052] The communication design of the collection pipe 31 and the collection tank 12 ensures that the solution can smoothly flow into the collection pipe 31, and the collection pump 32 can provide the necessary power to make the solution quickly and smoothly discharge from the concentration barrel 1. At the same time, the collection valve 33 can close the collection pipe 31 when needed to prevent solution leakage or backflow, thereby ensuring the stability and safety of the entire system. The detection pipe 51 communicates with the collection tank 12 and can collect the concentrated solution sample in time, and the detection valve 52 controls the opening and closing of the detection pipe 51, which is convenient for the operator to take samples and analyze, thereby effectively avoiding product quality problems caused by improper solution concentration.

[0053] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A concentration apparatus for the preparation of methoxyacetic acid, characterized in that: The assembly includes a concentration tank (1), a spray assembly (2), a collection assembly (3), and an evaporation assembly (4). A liquid inlet pipe (6) is connected to the top of one side of the concentration tank (1). The spray assembly (2) is located inside the concentration tank (1), and the liquid inlet pipe (6) is connected to the spray assembly (2). The spray assembly (2) is used to spray the solution to be concentrated into the concentration tank (1). The collection assembly (3) is located at the bottom of the concentration tank (1) and is used to collect the concentrated solution. A wire is fixedly installed at the center of the bottom of the concentration tank (1). The screw (7) is a reciprocating screw (7), which is vertically arranged and coaxial with the concentration tank (1); a rotating block (71) is screwed vertically on the screw (7); an air inlet (11) is provided at the center of the top of the concentration tank (1); the evaporation assembly (4) includes an air inlet pipe (41), an exhaust pipe (42), a connecting pipe (43), a telescopic pipe (44), a gas delivery pipe (45), a steam ring pipe (46), and a steam pipe (47); the air inlet pipe (41) is connected to the top surface of the concentration tank (1). The pipe is fixedly connected and communicates with the air inlet (11); the exhaust pipe (42) communicates with the top of the side wall of the concentration tank (1); the connecting pipe (43) is L-shaped, the top end of the connecting pipe (43) is rotatably connected to the inner wall of the air inlet (11), and the connecting pipe (43) communicates with the air inlet pipe (41); the end of the connecting pipe (43) away from the air inlet (11) is fixedly connected to the top end of the telescopic pipe (44), the telescopic pipe (44) is vertically arranged, and the bottom end of the telescopic pipe (44) is connected to the gas delivery pipe (45). Fixed connection; the gas supply pipe (45) is horizontally arranged, one end of the gas supply pipe (45) is fixedly connected to the rotating block (71), and the other end is fixedly connected to the steam ring pipe (46); the steam ring pipe (46) is coaxially arranged with the lead screw (7), and there are several steam pipes (47), all of which are fixedly connected to the top of the steam ring pipe (46). The steam pipes (47) are inclined, and the several steam pipes (47) are arranged in a circular array with the axis of the steam ring pipe (46) as the array axis. The spray assembly (2) includes a lower liquid tray (21), the side wall of which is fixedly connected to the top of the inner wall of the concentration tank (1), and the liquid inlet pipe (6) is connected to the lower liquid tray (21). The lead screw is located below the lower liquid tray; The lower liquid tray (21) is annular, and a connecting port (24) is provided in the middle of the lower liquid tray (21). The lower section of the connecting pipe (43) is located in the connecting port (24), and the top end of the telescopic pipe (44) is also located in the connecting port (24). A collection trough (12) is provided on the bottom surface of the concentration tank (1); The collection assembly (3) includes a collection pipe (31), a collection pump (32), and a collection valve (33). The collection pipe (31) is connected to the collection tank (12). The collection pump (32) is installed on the collection pipe (31). The collection valve (33) is also installed on the collection pipe (31) and is located between the collection pump (32) and the collection tank (12). It also includes a detection component (5), which includes a detection tube (51) and a detection valve (52). The detection tube (51) is also connected to the collection tank (12), and the detection valve (52) is disposed on the detection tube (51). The collection pipe (31) is provided with a first three-way valve (34), and the inlet pipe (6) is provided with a second three-way valve (61). A return pipe (8) is connected between the first three-way valve (34) and the second three-way valve (61).

2. The concentration apparatus for preparing methoxyacetic acid according to claim 1, characterized in that: The steam ring pipe (46) is provided in a plurality of them. The plurality of steam ring pipes (46) are fixedly connected to the gas transmission pipe (45) and communicate with the gas transmission pipe (45). The plurality of steam ring pipes (46) are coaxially arranged. The top of each steam ring pipe (46) is fixedly connected to a plurality of inclined steam pipes (47).

3. The concentration apparatus for preparing methoxyacetic acid according to claim 2, characterized in that: The lower liquid tray (21) has a circular cross-section. The lower liquid tray (21) is horizontally arranged and coaxially arranged with the concentration tank (1). Several evenly distributed lower liquid holes (22) are opened on the bottom surface of the lower liquid tray (21). Each lower liquid hole (22) is provided with a nozzle (23) fixedly connected to the bottom surface of the lower liquid tray (21).

4. The concentration apparatus for preparing methoxyacetic acid according to claim 3, characterized in that: The collection trough (12) is located on one side of the bottom surface inside the concentration tank (1). The bottom surface inside the concentration tank (1) is inclined, and the collection trough (12) is located on the side of the lower bottom surface inside the concentration tank (1).

5. A concentration apparatus for preparing methoxyacetic acid according to claim 4, characterized in that: The top of the lead screw (7) is provided with a limiting block (9).

Images