Condensing equipment for recycling waste acetonitrile solvent

Abstract

The utility model relates to the technical field of condensing equipment, and discloses condensing equipment for recycling a waste acetonitrile solvent, which comprises an equipment shell, a first mounting piece is fixed on the right side of the equipment shell through a bolt, and a filtering mechanism for filtering the solvent is arranged on the right side of the first mounting piece. A cleaning mechanism for cleaning the inner wall of the equipment is arranged on the left side of the equipment shell; and the filtering mechanism comprises a filtering box, the filtering box communicates with the right side of the first mounting part, and a fine filtering net plate is mounted in the filtering box in the vertical direction. According to the solvent filtering device, large impurities in a solvent can be filtered through the coarse filter screen plate, small impurities in the solvent can be filtered through the fine filter screen plate, condensation and mixing of the impurities and the solvent are reduced, the filter plate can be detached in the vertical direction through the fixing strips arranged on the filter plate under the cooperation of the limiting blocks, and therefore the solvent filtering device is convenient to use. Therefore, the replacement is convenient.

Description

A condensation device for recovering waste acetonitrile solvent Technical Field

[0001] This utility model relates to the field of condensation equipment technology, specifically a condensation equipment for recovering waste acetonitrile solvent. Background Technology

[0002] Acetonitrile, also known as methyl cyanide, is a colorless, highly volatile liquid with a characteristic odor similar to ether. It possesses excellent solvent properties, dissolving a wide variety of organic, inorganic, and gaseous substances. While it exhibits some toxicity, it is infinitely miscible with water and alcohols. Acetonitrile undergoes typical nitrile reactions and is used in the preparation of many typical nitrogen-containing compounds, making it an important organic intermediate. Acetonitrile can be used as a solvent in the synthesis of vitamin A, cortisone, carbamate drugs, and their intermediates. The condensation equipment for waste acetonitrile solvent recovery is a core component of the acetonitrile recovery process. Recovering acetonitrile from waste solutions enables the effective utilization of waste liquid. The condensation technology cools and condenses acetonitrile vapor into liquid, achieving the separation and recovery of acetonitrile from waste gas or waste liquid.

[0003] In existing technologies, such as the dehydration production system for preparing anhydrous acetonitrile from waste organic solvent containing acetonitrile by distillation purification disclosed in CN208776612U, the system includes, in sequence, a magnetic pump, an acetonitrile recovery metering tank, a distillation kettle, a distillation column, a first condenser, a first high-level tank, a distillation kettle, a distillation column, a second condenser, an acetonitrile receiving tank, a dehydration kettle, a dehydration column, a third condenser, a second high-level tank, a purification kettle, a purification column, a fourth condenser, a third high-level tank, a booster pump, a filter, and an anhydrous acetonitrile receiving tank, as well as a first solenoid valve, a second solenoid valve, a moisture sensor, and a switch controller. It recovers the acetonitrile-containing waste solvent by condensing it in the distillation kettle, distillation column, and first condenser, and returns the substandard intermediate acetonitrile to the distillation column for re-distillation purification.

[0004] The existing method involves recovering acetonitrile-containing waste solvent, condensing it in a distillation kettle, distillation column, and first condenser, and then returning the substandard intermediate acetonitrile to the distillation column for re-distillation and purification. However, this method cannot filter out impurities in the solvent during the condensation process, causing these impurities to be condensed together and incorporated into the material, thus reducing the quality of the recovered material. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Given that the existing technology has the problem that when the solvent is condensed, impurities in the solvent cannot be filtered out, these impurities are condensed together and incorporated into the material, which reduces the quality of material recovery.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A condensation device for recovering waste acetonitrile solvent includes a device housing, a first mounting component is fixed to the right side of the device housing by bolts, a filtration mechanism for filtering solvent is provided on the right side of the first mounting component, and a cleaning mechanism for cleaning the inner wall of the device is provided on the left side of the device housing.

[0009] The filtration mechanism includes a filter box, which is connected to the right side of the first mounting component. A fine filter plate is installed vertically inside the filter box, and a coarse filter plate is installed on the right side of the fine filter plate. Fixing strips are fixed at both ends of the fine filter plate and the coarse filter plate.

[0010] As a further embodiment of this utility model: the side wall of the fixing strip is connected to a limiting block that is fixed to the inner wall of the filter box, and the right side of the filter box is connected to a solvent inlet pipe.

[0011] As a further embodiment of this utility model: the side wall of the first mounting component is connected to a solvent outlet pipe, and the outer surface of the equipment shell is connected to two medium pipes.

[0012] As a further improvement of this utility model: several heat exchange tubes are installed horizontally inside the outer shell of the equipment, and a partition plate is welded horizontally to the inner wall of the first mounting component.

[0013] As a further embodiment of this utility model: the cleaning mechanism includes a second mounting component, which is fixed to the left side of the equipment housing by bolts, and a stepper motor is fixed to the inner wall of the second mounting component by bolts.

[0014] As a further embodiment of this utility model: the power output shaft of the stepper motor is fixed with a screw, and the outer surface of the screw is threadedly connected to a movable plate that is slidably connected to the heat exchange tube.

[0015] As a further improvement of this utility model, a guide rod that is welded to the second mounting component runs through one side of the movable plate.

[0016] As a further improvement of this utility model: two support legs are welded to the lower surface of the equipment shell, and fixing bolts are installed at the lower ends of the two support legs.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model uses a coarse filter plate to filter larger impurities in the solvent, while a fine filter plate can filter smaller impurities in the solvent, thereby reducing the mixing of impurities with the solvent. Furthermore, the filter plate can be disassembled vertically with the help of a limiting block, thanks to the fixing strips on the filter plate, making it easy to replace.

[0019] 2. This utility model uses a stepper motor to drive the screw to rotate. With the cooperation of the guide rod, the screw can drive the threaded movable plate to move horizontally when it rotates. The inner wall of the movable plate is in contact with the outer surface of the heat exchange tube, so that the movable plate... Attached Figure Description

[0020] Figure 1 is a three-dimensional structural diagram of a condensation device for recovering waste acetonitrile solvent;

[0021] Figure 2 is a schematic cross-sectional view of the outer shell of a condensation device for recovering waste acetonitrile solvent;

[0022] Figure 3 is a cross-sectional schematic diagram of the second mounting component in a condensation device for recovering waste acetonitrile solvent;

[0023] Figure 4 is a schematic cross-sectional view of the first installation component in a condensation device for recovering waste acetonitrile solvent;

[0024] Figure 5 is a schematic cross-sectional view of the filter box in a condensation device for recovering waste acetonitrile solvent.

[0025] In the diagram: 1. Equipment casing; 2. First mounting component; 3. Filter box; 31. Fine filter screen; 32. Coarse filter screen; 33. Fixing strip; 34. Limiting block; 35. Solvent inlet pipe; 4. Solvent outlet pipe; 5. Medium pipe; 6. Second mounting component; 61. Stepper motor; 62. Screw; 63. Movable plate; 64. Guide rod; 7. Heat exchange tube; 8. Divider plate; 9. Support leg; 10. Fixing bolt. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] Example 1

[0030] Please refer to Figures 1-5, which are the first embodiment of this utility model. This embodiment provides a condensation device for recovering waste acetonitrile solvent, including a device shell 1. A first mounting part 2 is fixed to the right side of the device shell 1 by bolts. A filtration mechanism for filtering solvent is provided on the right side of the first mounting part 2. A cleaning mechanism for cleaning the inner wall of the device is provided on the left side of the device shell 1.

[0031] The filtration mechanism includes a filter box 3, which is connected to the right side of the first mounting part 2. A fine filter plate 31 is installed vertically inside the filter box 3, and a coarse filter plate 32 is installed on the right side of the fine filter plate 31. Fixing strips 33 are fixed at both ends of the fine filter plate 31 and the coarse filter plate 32.

[0032] Specifically, the side wall of the fixing strip 33 is connected to a limiting block 34 that is fixed to the inner wall of the filter box 3, and the right side of the filter box 3 is connected to a solvent feed pipe 35.

[0033] Furthermore, with the help of the fixing strip 33 on the filter plate and the limiting block 34, the filter plate can be disassembled in the vertical direction, making it easy to replace.

[0034] Specifically, the side wall of the first mounting component 2 is connected to a solvent outlet pipe 4, and the outer surface of the equipment housing 1 is connected to two media pipes 5.

[0035] Furthermore, the two medium pipes 5 on the equipment housing 1 are connected to the external medium inlet and outlet pipes respectively, so that the heat exchange medium can enter the equipment housing 1.

[0036] Specifically, several heat exchange tubes 7 are installed horizontally inside the equipment casing 1, and a partition plate 8 is welded horizontally to the inner wall of the first mounting component 2.

[0037] Furthermore, the filtered solvent re-enters the first mounting component 2. Since the first mounting component 2 is equipped with a partition plate 8, the solvent does not flow down but enters into several heat exchange tubes 7 at the top.

[0038] In use, first place the equipment casing 1 in a suitable position, and connect the two medium pipes 5 on the equipment casing 1 to the external medium inlet and outlet pipes respectively, so that the heat exchange medium can enter the equipment casing 1. The solvent inlet pipe 35 is connected to the solvent delivery pipe, and the solvent outlet pipe 4 is connected to the solvent collection device. The solvent enters the filter box 3 through the solvent inlet pipe 35. The coarse filter plate 32 can filter out larger impurities in the solvent, while the fine filter plate 31 can filter out smaller impurities in the solvent. The fixing strip 33 on the filter plate, in cooperation with the limiting block 34, further enhances the filter's performance. The filter plate can be disassembled vertically for easy replacement. The filtered solvent re-enters the first mounting component 2. Because the first mounting component 2 is equipped with a partition plate 8, the solvent does not flow downwards but enters several heat exchange tubes 7 at the upper end. The heat exchange medium flowing inside the equipment absorbs heat and cools the heat exchange tubes 7, thereby cooling and condensing the solvent. The other end of the heat exchange tube 7 is connected to the bottom heat exchange tube 7, so that the condensed solvent flows through the bottom heat exchange tube 7 to the bottom of the first mounting component 2, and then is discharged to the outside through the solvent outlet pipe 4.

[0039] In summary, the condensation equipment for recovering waste acetonitrile solvent can filter out larger impurities in the solvent during use, while the fine filter plate 31 can filter out smaller impurities in the solvent. Furthermore, the filter plate can be disassembled vertically in the presence of the fixing strip 33 and the limiting block 34, making it convenient for replacement.

[0040] Example 2

[0041] Please refer to Figures 1-5, which show the second embodiment of this utility model.

[0042] Specifically, the cleaning mechanism includes a second mounting component 6, which is fixed to the left side of the equipment housing 1 by bolts, and a stepper motor 61 is fixed to the inner wall of the second mounting component 6 by bolts.

[0043] Furthermore, the stepper motor 61 installed in the second mounting component 6 can drive the screw 62 to rotate.

[0044] Specifically, the power output shaft of the stepper motor 61 is fixed with a screw 62, and the outer surface of the screw 62 is threaded with a movable plate 63 that is slidably connected to the heat exchange tube 7. A guide rod 64 that is welded to the second mounting part 6 passes through one side of the movable plate 63.

[0045] Furthermore, when the screw 62 rotates, it can drive the threaded movable plate 63 to move horizontally, which can scrape off the impurities adhering to the outer surface of the heat exchange tube 7.

[0046] Specifically, two support legs 9 are welded to the lower surface of the equipment housing 1, and fixing bolts 10 are installed at the lower ends of the two support legs 9.

[0047] Furthermore, the stability of the equipment can be ensured by the support legs 9 provided on the equipment housing 1, and the support legs 9 can be fixed by the fixing bolts 10.

[0048] In use, the stability of the equipment is ensured by the support legs 9 provided on the outer casing 1. The support legs 9 can be fixed by the fixing bolts 10, thereby limiting the position of the equipment. The stepper motor 61 provided in the second mounting part 6 can drive the screw 62 to rotate. With the cooperation of the guide rod 64, the rotation of the screw 62 can drive the threaded movable plate 63 to move horizontally. The movable plate 63 is a honeycomb plate, and the inner wall of the movable plate 63 is attached to the outer surface of the heat exchange tube 7. When the movable plate 63 moves, it can scrape off the impurities adhering to the outer surface of the heat exchange tube 7, which can be discharged with the heat exchange medium, thereby achieving the function of self-cleaning.

[0049] In summary, the condensation equipment for recovering waste acetonitrile solvent can filter out larger impurities in the solvent during use, while the fine filter plate 31 can filter out smaller impurities. Furthermore, the filter plate can be disassembled vertically in the presence of the fixing strip 33 and the limiting block 34, making it easy to replace. In addition, the stepper motor 61 installed in the second mounting component 6 can drive the screw 62 to rotate, so that when the movable plate 63 moves, it can scrape off the impurities adhering to the outer surface of the heat exchange tube 7, thereby achieving a self-cleaning effect.

[0050] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0051] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0052] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A condensation device for recovering waste acetonitrile solvent, comprising a device housing (1), characterized in that: The right side of the equipment housing (1) is fixed with a first mounting part (2) by bolts. The right side of the first mounting part (2) is provided with a filtration mechanism for filtering solvents. The left side of the equipment housing (1) is provided with a cleaning mechanism for cleaning the inner wall of the equipment. The filtration mechanism includes a filter box (3). The filter box (3) is connected to the right side of the first mounting part (2). A fine filter screen plate (31) is installed vertically inside the filter box (3). A coarse filter screen plate (32) is installed on the right side of the fine filter screen plate (31). Fixing strips (33) are fixed at both ends of the fine filter screen plate (31) and the coarse filter screen plate (32).

2. The condensation equipment for recovering waste acetonitrile solvent according to claim 1, characterized in that: The side wall of the fixing strip (33) is connected to a limiting block (34) that is fixed to the inner wall of the filter box (3), and the right side of the filter box (3) is connected to a solvent feed pipe (35).

3. The condensation equipment for recovering waste acetonitrile solvent according to claim 2, characterized in that: The side wall of the first mounting component (2) is connected to a solvent outlet pipe (4), and the outer surface of the equipment housing (1) is connected to two media pipes (5).

4. The condensation equipment for recovering waste acetonitrile solvent according to claim 3, characterized in that: Several heat exchange tubes (7) are installed horizontally inside the outer shell (1) of the equipment, and a partition plate (8) is welded horizontally to the inner wall of the first mounting component (2).

5. The condensation equipment for recovering waste acetonitrile solvent according to claim 1, characterized in that: The cleaning mechanism includes a second mounting component (6), which is fixed to the left side of the equipment housing (1) by bolts, and a stepper motor (61) is fixed to the inner wall of the second mounting component (6) by bolts.

6. The condensation equipment for recovering waste acetonitrile solvent according to claim 5, characterized in that: The power output shaft of the stepper motor (61) is fixed with a screw (62), and the outer surface of the screw (62) is threaded with a movable plate (63) that is slidably connected to the heat exchange tube (7).

7. The condensation equipment for recovering waste acetonitrile solvent according to claim 6, characterized in that: A guide rod (64) that is welded to the second mounting component (6) runs through one side of the movable plate (63).

8. The condensation equipment for recovering waste acetonitrile solvent according to claim 7, characterized in that: Two support legs (9) are welded to the lower surface of the equipment housing (1), and fixing bolts (10) are installed at the lower ends of the two support legs (9).

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