Continuous desolvation-based pendimethalin precipitation device

Abstract

The utility model discloses a pendimethalin precipitation device based on continuous desolvation, which relates to the technical field of chemical equipment, and adopts the technical scheme that a gear A is coaxially mounted on the mounting surface of a turntable, the gear A is meshed with a gear B, one end of a connecting rod is mounted on the gear B, and the other end of the connecting rod is meshed with the gear A; the tank bottom scraping device has the advantages that the tank bottom scraping assembly is arranged, so that the rotary scraping plate can rotate around the axis where the connecting rod is located while being driven by the rotary disc to revolve, the tank bottom can be scraped while stirring is achieved, the scraping effect is good, and the scraping effect is good. The rotating force is transmitted to the rotating scrapers through the gear B along the connecting rod and the clamping rod, and by switching the rotating scrapers with larger sizes, the device can be suitable for the evaporating dish with larger caliber, so that the caliber size of the evaporating dish is improved by the upper limit, the evaporating area is increased, and the desolventizing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, and more specifically, to a pendimethalin precipitation device based on continuous desolventizing. Background Art

[0002] Pendimethalin is an organic compound with the molecular formula C13H19N3O4, belonging to the dinitroaniline herbicide. It mainly inhibits the division of meristem cells and does not affect the germination of weed seeds. Instead, it works after the young shoots, stems and roots absorb the agent during the germination of weed seeds. It is suitable for corn, soybeans, cotton, vegetables and orchards to control annual grass and broad-leaved weeds such as crabgrass, foxtail grass, bluegrass, foxtail, goosegrass, gray lily, champignon intestine, nightshade, quinoa, and amaranth. It also has a strong inhibitory effect on the growth of dodder seedlings. Pendimethalin can effectively inhibit the occurrence of axillary buds of tobacco, increase the yield of tobacco leaves and improve the quality.

[0003] Hydrochloric acid, ammonium chloride and an auxiliary catalyst are added to a dichloroethane solution of a crude product of pendimethalin containing N-nitroso compounds after the nitration reaction is completed, and the mixture is stirred under heating to react. After the reaction solution is post-treated, it is concentrated and desolventized to obtain a pendimethalin product. During the concentration and desolventization process, the reaction solution needs to be heated and stirred to precipitate pendimethalin, so a pendimethalin precipitation device is needed.

[0004] Common precipitation devices mostly use a desolventizing kettle, which is equipped with a stirring assembly with a scraper to stir in a vertical closed container tank to accelerate evaporation while preventing the substance from sticking to the tank wall. The motor output shaft is usually set perpendicular to the horizontal plane, and the stirring assembly is a frame ring connected to the motor output shaft. The scraper is set on the outer edge of the frame ring. The wider the frame ring, the farther the scraper is from the center of the motor output shaft in the vertical plane, and the scraping force tends to decay. Therefore, there is an upper limit to the size of the frame ring and the tank body. However, during the evaporation and desolventizing process, the larger the internal diameter of the tank body, the larger the evaporation area, and the upper limit of the tank body diameter size constrains the evaporation rate of the device.

[0005] Therefore, in order to solve the above technical problems, the present application proposes a pendimethalin precipitation device based on continuous desolventization. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a pendimethalin precipitation device based on continuous desolventization.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the pendimethalin precipitation device based on continuous desolventization includes an evaporating dish as a heating desolventizing container, and also includes an upper cover buckled on the evaporating dish through a fastening ring, wherein a tank bottom scraping assembly and a tank wall scraping assembly are installed in the upper cover, which are used for stirring to increase the desolventizing speed and prevent the evaporating dish tank bottom and tank wall from being stuck;

[0008] The tank bottom scraping assembly comprises a servo motor, a turntable, a gear A and a gear B, wherein the servo motor is braked on the turntable, the turntable mounting surface is coaxially mounted with a gear A, the gear A is meshed with the gear B, one end of a connecting rod is mounted on the gear B, a rotating scraper is fixedly mounted on the other end of the connecting rod through a clamping rod, the rotating scraper is arranged to fit the bottom of the evaporating dish, the connecting rod is rotatably mounted in a mounting frame through a bearing, and the mounting frame is fixed to the turntable mounting surface.

[0009] Preferably, the gear B is arranged obliquely to the horizontal plane, the connecting rod is perpendicular to the central plane where the gear B is located, and the upper cover is arranged to be a cone-shaped with the tip pointing upward to leave more space for the evaporated gas to rise along the inner wall of the upper cover to accelerate the desolvation rate.

[0010] Preferably, the tank wall scraping assembly comprises an extension frame, a short clamping rod and a side scraper, the fixed end of the extension frame is fixed to the turntable mounting surface, and the extension frame mounting end is equipped with a side scraper through the short clamping rod, and the outer edge of the side scraper is arranged to fit the evaporating dish tank wall.

[0011] Preferably, the servo motor is installed outside the upper cover, and its output shaft penetrates the upper cover and is connected to the turntable, and the intersection of the servo motor output shaft and the upper cover is rotatably connected through a bearing.

[0012] Preferably, a chassis is arranged outside the servo motor, one end of a cover opening rod is fixed on the top of the chassis, the other end of the cover opening rod is braked by a rotary motor and rotatably mounted on the top of a support frame, the support frame is fixed on the surface of a bottom plate, and the bottom plate is supported on the bottom of the evaporating dish.

[0013] Preferably, the upper cover is provided with an air guide pipe for guiding the gas evaporated from the evaporating dish.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In the utility model, by setting up a tank bottom scraping assembly, the rotating scraper can rotate on its own axis with the connecting rod while the turntable drives the revolution, so as to scrape the tank bottom at the same time as stirring is achieved. The rotating force is transmitted to the rotating scraper through the gear B along the connecting rod and the clamping rod. By switching to a larger rotating scraper, it can be suitable for evaporating dishes with larger diameters, so that the diameter of the evaporating dish is increased, the evaporation area is increased, and the desolventizing efficiency is improved, thereby solving the problem that the larger the width of the frame ring, the farther the scraper is from the center of the motor output shaft in the vertical plane, and the scraping force tends to decay. Therefore, there is an upper limit to the diameter size of the frame ring and the tank body. However, during the evaporation and desolventizing process, the larger the diameter of the tank body, the larger the evaporation area. The upper limit of the diameter size of the tank body constrains the evaporation rate of the device.

[0016] 2. In the utility model, by setting the tank bottom scraping component in an inclined shape and setting the upper cover in a cone shape with the tip pointing upward, more space for the evaporation gas to rise is reserved, thereby accelerating the evaporation efficiency.

[0017] 3. In the utility model, the upper cover is buckled on the evaporating dish by setting a fastening ring, and the upper cover and the tank bottom scraping assembly and the tank wall scraping assembly are removed from the evaporating dish by setting a cover opening rod, which is convenient for loading and unloading and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the evaporating dish in the utility model;

[0021] Figure 3 It is a cross-sectional view of the tank bottom scraping assembly in the utility model;

[0022] Figure 4 It is a cross-sectional view of the tank wall scraping assembly in the utility model.

[0023] 1. Evaporating dish;

[0024] 2. Upper cover;

[0025] 3. Airway tube;

[0026] 4. Bottom plate;

[0027] 5. Support frame;

[0028] 6. Opening rod;

[0029] 7. Rotating motor;

[0030] 8. Tank bottom scraping assembly;

[0031] 81. servo motor; 82. gear A; 83. gear B; 84. connecting rod; 85. clamping rod; 86. rotating scraper; 87. turntable; 88. mounting frame;

[0032] 9. Tank wall scraping assembly;

[0033] 91. Extension frame; 92. Short clamping rod; 93. Side scraper;

[0034] 10. Fastening ring. DETAILED DESCRIPTION

[0035] like Figure 1-4 As shown, a pendimethalin precipitation device based on continuous desolventizing includes an evaporating dish 1 as a heating desolventizing container, and also includes an upper cover 2 buckled on the evaporating dish 1 through a fastening ring 10, and a tank bottom scraping component 8 and a tank wall scraping component 9 are installed in the upper cover 2, which are used for stirring to increase the desolventizing speed and prevent the tank bottom and tank wall of the evaporating dish 1 from sticking;

[0036] Before evaporation and concentration, the cover-opening rod 6 is braked to rotate by the rotating motor 7, so as to drive the upper cover 2 and the tank bottom scraping assembly 8 and the tank wall scraping assembly 9 to rotate upward and away from the evaporating dish 1, and the pendimethalin reaction solution can be injected into the evaporating dish 1. The cover-opening rod 6 is braked again to close the evaporating dish 1, and the fastening ring 10 is put on the closing part of the upper cover 2 and the evaporating dish 1, and the fastening ring 10 is tightened by bolts and nuts;

[0037] The upper cover 2 is buckled on the evaporating dish 1 by providing a fastening ring 10, and the upper cover 2 and the tank bottom scraping assembly and the tank wall scraping assembly 9 are removed from the evaporating dish 1 by providing a cover opening rod 6, so as to facilitate loading and unloading and cleaning;

[0038] The tank bottom scraping assembly 8 includes a servo motor 81, a turntable 87, a gear A82 and a gear B83. The servo motor 81 is braked on the turntable 87. The turntable 87 mounting surface is coaxially mounted with a gear A82. The gear A82 is meshed with the gear B83. One end of a connecting rod 84 is mounted on the gear B83. The other end of the connecting rod 84 is fixed with a rotating scraper 86 through a clamping rod 85. The rotating scraper 86 is arranged to fit the bottom of the evaporating dish 1. The connecting rod 84 is rotatably mounted in a mounting frame 88 through a bearing. The mounting frame 88 is fixed to the mounting surface of the turntable 87.

[0039] Then, the servo motor 81 is braked to drive the rotating disk 87 to rotate, the rotating disk 87 drives the gear A82 to rotate, the gear A82 transmits the power to the gear B83, the gear B83 rotates, the gear B83 drives the connecting rod 84 to rotate, and the connecting rod 84 drives the rotating scraper 86 to rotate along the axis of the connecting rod 84 through the clamping rod 85;

[0040] On the other hand, the mounting frame 88 fixed to the mounting surface of the turntable 87 rotates synchronously with the turntable 87, and the connecting rod 84 is rotatably connected in the mounting frame 88 through the bearing, so the mounting frame 88 will drive the connecting rod 84 to revolve around the axis of the output shaft of the servo motor 81 as the rotation center, and the connecting rod 84 will then synchronously bring the revolving motion to the rotating scraper 86;

[0041] Therefore, the rotating scraper 86 rotates on the central axis of the connecting rod 84 while revolving on the axis of the output shaft of the servo motor 81, so as to achieve a stirring effect and at the same time, to scrape the bottom of the tank to prevent the material from adhering to the bottom of the evaporating dish 1 during the desolvation process;

[0042] Therefore, by setting up the tank bottom scraping assembly 8, the rotating scraper 86 can rotate on its own axis with the connecting rod 84 while being driven by the turntable 87 to revolve, so as to scrape the tank bottom while stirring. The rotating force is transmitted to the rotating scraper 86 through the gear B83 along the connecting rod 84 and the clamping rod 85. By switching to a larger rotating scraper 86, it can be suitable for an evaporating dish 1 with a larger diameter, so that the diameter of the evaporating dish 1 is increased, the evaporation area is increased, and the desolventizing efficiency is improved, thereby solving the problem that the larger the width of the frame ring, the farther the scraper is from the center of the motor output shaft in the vertical plane, and the scraping force tends to decay. Therefore, there is an upper limit to the diameter size of the frame ring and the tank body. However, during the evaporation and desolventizing process, the larger the diameter of the tank body, the larger the evaporation area. The upper limit of the diameter size of the tank body constrains the evaporation rate of the device.

[0043] The tank wall scraping assembly 9 includes an extension frame 91, a short clamping rod 92 and a side scraper 93. The fixed end of the extension frame 91 is fixed to the mounting surface of the turntable 87, and the mounting end of the extension frame 91 is installed with the side scraper 93 through the short clamping rod 92. The outer edge of the side scraper 93 is arranged to fit the tank wall of the evaporating dish 1.

[0044] The servo motor 81 is installed outside the upper cover 2, and its output shaft penetrates the upper cover 2 and is connected to the turntable 87, and the intersection of the output shaft of the servo motor 81 and the upper cover 2 is rotatably connected through a bearing installation;

[0045] As the turntable 87 rotates, the extension frame 91 fixed on the mounting surface of the turntable 87 drives the side scraper 93 to rotate through the short clamping rod 92 to scrape the tank wall of the evaporating dish 1;

[0046] As attached Figure 2As shown, the evaporating dish 1 is configured to have a large aperture and a low height, thereby maximizing the evaporation area, and reducing the height of the evaporating dish 1, thereby avoiding the contact area between the tank wall and the solution, and reducing the possibility of adhesion;

[0047] The rotating scraper 86 and the side scraper 93 can be configured to have a high temperature resistant and corrosion resistant silicone material fixed to the front end of the metal material to increase the degree of fit with the inner wall of the evaporating dish 1 and improve the scraping effect;

[0048] A chassis is provided outside the servo motor 81, one end of a cover opening rod 6 is fixed on the top of the chassis, the other end of the cover opening rod 6 is braked by a rotary motor 7 and rotatably mounted on the top of a support frame 5, the support frame 5 is fixed on the surface of a bottom plate 4, and the bottom plate 4 is supported on the bottom of the evaporating dish 1;

[0049] The gear B83 is arranged to be inclined to the horizontal plane, the connecting rod 84 is perpendicular to the central plane where the gear B83 is located, and the upper cover 2 is arranged to be a frustum with the tip upward, so as to leave more space for the evaporated gas to rise along the inner wall of the upper cover 2 to accelerate the desolvation rate. The upper cover 2 is provided with an air guide 3 for guiding the evaporated gas in the evaporating dish 1;

[0050] By setting the tank bottom scraping assembly 8 to an inclined shape and setting the upper cover 2 to a cone shape with the tip pointing upward, more space for the evaporation gas to rise is reserved, thereby accelerating the evaporation efficiency.

[0051] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A pendimethalin precipitation device based on continuous desolventizing, characterized in that: The invention comprises an evaporating dish (1) as a heating desolventizing container, and also comprises an upper cover (2) which is buckled onto the evaporating dish (1) via a fastening ring (10), wherein a tank bottom scraping assembly (8) and a tank wall scraping assembly (9) are installed in the upper cover (2) for stirring to increase the desolventizing speed and to prevent the tank bottom and tank wall of the evaporating dish (1) from being stuck; The tank bottom scraping assembly (8) comprises a servo motor (81), a rotating disk (87), a gear A (82) and a gear B (83); the servo motor (81) is braked by the rotating disk (87); the rotating disk (87) has a gear A (82) coaxially mounted on its mounting surface; the gear A (82) meshes with the gear B (83); one end of a connecting rod (84) is mounted on the gear B (83); the other end of the connecting rod (84) is fixedly mounted with a rotating scraper (86) via a clamping rod (85); the rotating scraper (86) is arranged to fit the tank bottom of the evaporating dish (1); the connecting rod (84) is rotatably mounted in a mounting frame (88) via a bearing; the mounting frame (88) is fixed to the mounting surface of the rotating disk (87).

2. A pendimethalin precipitation device based on continuous desolventizing according to claim 1, characterized in that: The gear B (83) is arranged to be inclined to the horizontal plane, the connecting rod (84) is perpendicular to the central plane where the gear B (83) is located, and the upper cover (2) is arranged to be a cone-shaped with the tip pointing upward, so as to leave more space for the evaporated gas to rise along the inner wall of the upper cover (2) to accelerate the desolvation rate.

3. A pendimethalin precipitation device based on continuous desolventizing according to claim 2, characterized in that: The tank wall scraping assembly (9) comprises an extension frame (91), a short clamping rod (92) and a side scraper (93); the fixed end of the extension frame (91) is fixed on the mounting surface of the turntable (87); the mounting end of the extension frame (91) is provided with the side scraper (93) via the short clamping rod (92); the outer edge of the side scraper (93) is arranged to fit the tank wall of the evaporating dish (1).

4. The pendimethalin precipitation device based on continuous desolventizing according to claim 3, characterized in that: The servo motor (81) is installed outside the upper cover (2), and its output shaft penetrates the upper cover (2) and is connected to the turntable (87). The intersection of the output shaft of the servo motor (81) and the upper cover (2) is rotatably connected via a bearing.

5. The pendimethalin precipitation device based on continuous desolventization according to claim 4, characterized in that: A chassis is arranged outside the servo motor (81), one end of a cover opening rod (6) is fixed on the top of the chassis, the other end of the cover opening rod (6) is braked by a rotary motor (7) and is rotatably mounted on the top of a support frame (5), the support frame (5) is fixed on the surface of a bottom plate (4), and the bottom plate (4) is supported on the bottom of the evaporating dish (1).

6. A pendimethalin precipitation device based on continuous desolventization according to claim 5, characterized in that: The upper cover (2) is provided with an air guide pipe (3) for guiding the gas evaporated from the evaporating dish (1).

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