Solution cooling crystallization device for preparing o-methylphenylacetic acid

Abstract

The utility model discloses a solution cooling crystallization device for preparing o-methylphenylacetic acid, and relates to the technical field of cooling crystallization. The crystallization device comprises a bracket and a crystallization barrel, the crystallization barrel is fixedly connected into the support, the back face of the support is fixedly connected with a cooling assembly, a sealing cover is installed at the bottom of the crystallization barrel, and a stirring assembly is arranged in the crystallization barrel. The crystallization barrel comprises an outer barrel, an inner barrel is fixedly connected into the outer barrel, a discharging pipe is fixedly connected to the bottom of the inner barrel, and a barrel cover is mounted at the top of the outer barrel; the stirring assembly comprises a stirring motor and a stirring shaft, the bottom of the stirring shaft is fixedly connected with an auger rod, and the exterior of the stirring shaft is fixedly connected with a scraper and a plurality of stirring paddles. According to the utility model, the auger rod rotates in the discharge pipe, so that o-methylphenylacetic acid particles in the crystallization barrel can be uniformly discharged, blockage is avoided, and meanwhile, residual particles in the inner barrel can be discharged by driving the scraper to rotate close to the bottom of the inner cavity of the inner barrel through the stirring shaft.

Description

Technical Field

[0001] This invention belongs to the field of cooling crystallization technology, and in particular relates to a solution cooling crystallization device for preparing o-methylphenylacetic acid. Background Technology

[0002] o-Tolueneacetic acid is usually presented as white or pale yellow blocky crystals. It is mainly used as a pharmaceutical intermediate and can also be used as an intermediate in other organic synthesis. Cooling crystallization is a common method for producing o-tolueneacetic acid, which has the advantages of high-purity separation, strong applicability, energy saving and environmental protection.

[0003] Chinese patent CN213609896U discloses a high-efficiency crystallization device for the production of o-tolueneacetic acid, including a base, a support frame fixedly mounted on the base, a crystallization vessel rotatably mounted inside the support frame, a support slide rail fixedly mounted at the bottom of the crystallization vessel, and support wheels on the base. During operation, a cylinder pushes the crystallization vessel to swing back and forth on the support frame, increasing the cooling area at the bottom of the crystallization vessel and improving the efficiency of cooling and crystallization. The support wheels and support slide rail enhance the stability of the crystallization vessel during swinging. Before use, rotating the screw presses the bottom of the screw against a rubber block, leveling the base and preventing wobbling, thus improving the stability of the base.

[0004] However, after the crystallization process is completed in the above-mentioned device, the crystallized product will slowly gather and deposit at the bottom of the crystallization vessel. When discharging the material, the crystallization vessel needs to be tilted and scraped out, which is inconvenient and reduces production efficiency.

[0005] To address these issues, we provide a solution cooling crystallization apparatus for the preparation of o-methylphenylacetic acid. Utility Model Content

[0006] The purpose of this invention is to provide a solution cooling and crystallization device for the preparation of o-methylphenylacetic acid. The device uses a screw conveyor to rotate inside the discharge pipe to uniformly discharge o-methylphenylacetic acid particles from the crystallization tank. At the same time, a scraper rotates along the bottom of the inner tank to remove any remaining particles, thus solving the problem of inconvenient material discharge in existing cooling and crystallization devices.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model is a solution cooling crystallization device for preparing o-tolueneacetic acid, including a support and a crystallization tank; the crystallization tank is fixedly connected to the inside of the support, a cooling component is fixedly connected to the back of the support, a cap is installed at the bottom of the crystallization tank, and a stirring component is provided inside the crystallization tank;

[0009] The crystallization tank includes an outer tank fixedly connected inside the support frame, an inner tank fixedly connected inside the outer tank, a discharge pipe fixedly connected to the bottom of the inner tank, a tank cover installed on the top of the outer tank, and a feed pipe fixedly connected to the top of the tank cover.

[0010] The mixing assembly includes a mixing motor fixedly connected to the top of the bucket lid and a mixing shaft rotatably connected to the center of the bucket lid. The mixing shaft is fixedly connected to the output end of the mixing motor, and an auger rod is fixedly connected to the bottom of the mixing shaft. The lower end of the auger rod is located inside the discharge pipe. A scraper and multiple mixing blades are fixedly connected to the outside of the mixing shaft.

[0011] The present invention is further configured such that the cooling assembly includes a water tank located inside the bracket and a radiator fixedly connected to the back of the bracket. A circulation pump is fixedly connected to the top of the water tank. A water pumping pipe is connected between the input end of the circulation pump and the water tank. The input end of the radiator is connected to the output end of the circulation pump. A water filling pipe is connected between the output end of the radiator and the lower outer end of the outer barrel. A water return pipe is connected between the upper outer end of the outer barrel and the top of the water tank.

[0012] The present invention is further configured such that the cover includes a filter cover rotatably connected to the bottom of the discharge pipe, a bottom cover rotatably connected to the bottom of the filter cover, a first fixing block fixedly connected to the outside of the discharge pipe, a second fixing block fixedly connected to the outside of the bottom cover, a first fastening bolt rotatably connected to the inside of the first fixing block, a second fastening bolt rotatably connected to the inside of the second fixing block, a fixing seat fixedly connected to the outside of the filter cover, and both the first fastening bolt and the second fastening bolt are threaded into the inside of the fixing seat.

[0013] The present invention is further configured such that multiple support plates are fixedly provided at equal intervals along the circumference of the outer side of the inner tub, and the support plates are in contact with the inner wall of the outer tub.

[0014] The present invention is further configured such that a second sealing ring located at the top of the inner barrel and a third sealing ring located at the top of the outer barrel are fixedly connected to the bottom of the barrel lid.

[0015] The present invention is further configured such that a fourth sealing ring is fixedly connected to the top of the filter cover, and a fifth sealing ring is fixedly connected to the top of the bottom cover.

[0016] The present invention is further configured such that the scraper includes a fixed sleeve fixedly connected to the outside of the stirring shaft and a collar movably sleeved on the inner wall of the inner barrel. Multiple inclined rods are fixedly provided at equal intervals along the circumference of the fixed sleeve between the fixed sleeve and the collar. Multiple scraper strips are fixedly provided at equal intervals along the circumference of the bottom of the collar, and the scraper strips are in contact with the bottom of the inner cavity of the inner barrel.

[0017] The present invention is further configured such that two lifting rings are fixedly connected to the top of the bucket lid, and the two lifting rings are symmetrically distributed.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model uses a circulating pump to input water from the water tank into the radiator, which can cool the water. The cooled water is then injected between the outer and inner tanks through the water inlet pipe, thereby cooling the o-methylphenylacetic acid solution and accelerating the crystallization rate of o-methylphenylacetic acid, thus improving production efficiency. The heated circulating water then flows back into the water tank through the return water pipe.

[0020] 2. This utility model uses a stirring motor to drive the stirring shaft to rotate, and then the stirring shaft drives the auger rod to rotate in the discharge pipe, so that the o-methylphenylacetic acid particles in the crystallization tank can be discharged evenly and blockage can be avoided. At the same time, the stirring shaft drives the scraper to rotate along the bottom of the inner tank cavity to discharge the particles remaining in the inner tank.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall front structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the overall rear structure of this utility model.

[0025] Figure 3 This is a cross-sectional view of the crystallization tank of this utility model.

[0026] Figure 4 This is a cross-sectional view of the outer barrel of this utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the bucket lid of this utility model.

[0028] Figure 6 This is a schematic diagram of the structure of the filter cover of this utility model.

[0029] Figure 7 This is a schematic diagram of the scraper of this utility model.

[0030] Figure 8 for Figure 3 A magnified structural diagram of point A in the middle.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 100. Support frame; 200. Crystallization tank; 201. Outer tank; 202. Inner tank; 202a. Support plate; 203. Discharge pipe; 204. Tank lid; 204a. Lifting ring; 204b. Feed pipe; 204c. Second sealing ring; 204d. Third sealing ring; 300. Cooling assembly; 301. Water tank; 302. Circulation pump; 303. Radiator; 304. Water inlet pipe; 305. Water outlet pipe; 306. Water return pipe; 400. Cover; 401. Filter cover ; 402, Fixing base; 403, First fixing block; 404, First fastening bolt; 405, Fourth sealing ring; 406, Bottom cover; 407, Second fixing block; 408, Second fastening bolt; 409, Fifth sealing ring; 500, Mixing assembly; 501, Mixing motor; 502, Mixing shaft; 503, Screw rod; 504, Scraper; 504a, Fixing sleeve; 504b, Collar; 504c, Inclined rod; 504d, Scraper bar; 505, Mixing paddle. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Example 1

[0034] Please see Figures 1 to 5 The present invention is a solution cooling crystallization device for preparing o-tolueneacetic acid, comprising a support 100 and a crystallization tank 200; the crystallization tank 200 is fixedly connected to the inside of the support 100, a cooling component 300 is fixedly connected to the back of the support 100, a cap 400 is installed at the bottom of the crystallization tank 200, and a stirring component 500 is provided inside the crystallization tank 200.

[0035] The crystallization tank 200 includes an outer tank 201 fixedly connected inside the support 100, an inner tank 202 fixedly connected inside the outer tank 201, a discharge pipe 203 fixedly connected to the bottom of the inner tank 202, a tank cover 204 installed on the top of the outer tank 201, and a feed pipe 204b fixedly connected to the top of the tank cover 204. By circulating cold water between the outer tank 201 and the inner tank 202, the solution inside the inner tank 202 can be rapidly cooled, thereby accelerating the crystallization speed of o-methylphenylacetic acid and improving production efficiency.

[0036] The cooling assembly 300 includes a water tank 301 located inside the bracket 100 and a radiator 303 fixedly connected to the back of the bracket 100. A circulation pump 302 is fixedly connected to the top of the water tank 301. A water pump pipe 305 is connected between the input end of the circulation pump 302 and the water tank 301. The input end of the radiator 303 is connected to the output end of the circulation pump 302. A water inlet pipe 304 is connected between the output end of the radiator 303 and the lower outer end of the outer tank 201. A water return pipe 306 is connected between the upper outer end of the outer tank 201 and the top of the water tank 301. The water in the water tank 301 can be cooled by the radiator 303.

[0037] Specifically, multiple support plates 202a are fixedly provided at equal intervals along the circumference of the outer barrel 202, and the support plates 202a are in contact with the inner wall of the outer barrel 201. The support plates 202a can support the outer barrel 201 and enhance the overall strength of the crystallization barrel 200.

[0038] Furthermore, the bottom of the bucket lid 204 is fixedly connected with a second sealing ring 204c located at the top of the inner bucket 202 and a third sealing ring 204d located at the top of the outer bucket 201;

[0039] The top of the bucket lid 204 is fixedly connected to two lifting rings 204a, and the two lifting rings 204a are symmetrically distributed. The two lifting rings 204a make it easier to open the bucket lid 204.

[0040] The operation process of this embodiment is as follows: When it is necessary to cool and crystallize the o-tolueneacetic acid solution, firstly start the circulation pump 302 and the radiator 303. Then, the circulation pump 302 inputs the water in the water tank 301 into the radiator 303, so that the water can be kept at a low temperature. Subsequently, the cooled water is injected into the space between the outer tank 201 and the inner tank 202 through the water inlet pipe 304, thereby cooling the o-tolueneacetic acid solution and accelerating the crystallization speed of o-tolueneacetic acid, thus improving production efficiency. Subsequently, the heated circulating water flows back into the water tank 301 through the return water pipe 306. Example 2

[0041] Please see Figure 3 and Figures 6 to 8Based on the first specific embodiment, the stirring assembly 500 includes a stirring motor 501 fixedly connected to the top of the barrel cover 204 and a stirring shaft 502 rotatably connected to the center of the barrel cover 204. The stirring shaft 502 is fixedly connected to the output end of the stirring motor 501. An auger rod 503 is fixedly connected to the bottom of the stirring shaft 502, and the lower end of the auger rod 503 is located inside the discharge pipe 203. A scraper 504 and multiple stirring paddles 505 are fixedly connected to the outside of the stirring shaft 502. By rotating the stirring shaft 502, the multiple stirring paddles 505 can stir the o-methylphenylacetic acid solution, thereby making the o-methylphenylacetic acid solution cool more evenly. In addition, during discharge, the stirring shaft 502 drives the auger rod 503 to rotate, thereby making the o-methylphenylacetic acid particles in the crystallization barrel 200 evenly discharged. At the same time, the stirring shaft 502 drives the scraper 504 to rotate along the bottom of the inner cavity of the inner barrel 202 to clean the particles remaining in the inner barrel 202.

[0042] The cover 400 includes a filter cover 401 rotatably connected to the bottom of the discharge pipe 203. A bottom cover 406 is rotatably connected to the bottom of the filter cover 401. A first fixing block 403 is fixedly connected to the outside of the discharge pipe 203. A second fixing block 407 is fixedly connected to the outside of the bottom cover 406. A first fastening bolt 404 is rotatably connected inside the first fixing block 403. A second fastening bolt 408 is rotatably connected inside the second fixing block 407. A fixing seat 402 is fixedly connected to the outside of the filter cover 401. Both the first fastening bolt 404 and the second fastening bolt 408 are threaded into the inside of the fixing seat 402. By unscrewing the second fastening bolt 408, the bottom cover 406 can be opened, thereby discharging the liquid in the crystallization tank 200. By unscrewing the first fastening bolt 404, the filter cover 401 can be opened, thereby discharging the crystallized particles in the crystallization tank 200.

[0043] Specifically, the scraper 504 includes a fixed sleeve 504a fixedly connected to the outside of the stirring shaft 502 and a collar 504b movably sleeved on the inner wall of the inner barrel 202. Multiple inclined rods 504c are fixedly fixed at equal intervals along the circumference of the fixed sleeve 504a and the collar 504b. Multiple scraper strips 504d are fixedly fixed at equal intervals along the circumference of the bottom of the collar 504b, and the scraper strips 504d are in contact with the bottom of the inner cavity of the inner barrel 202.

[0044] Furthermore, a fourth sealing ring 405 is fixedly connected to the top of the filter cover 401, and a fifth sealing ring 409 is fixedly connected to the top of the bottom cover 406.

[0045] The operation process of this embodiment is as follows: When it is necessary to discharge the crystallized particles in the crystallization tank 200, the stirring motor 501 drives the stirring shaft 502 to rotate, and then the stirring shaft 502 drives the auger rod 503 to rotate in the discharge pipe 203, so that the o-methylphenylacetic acid particles in the crystallization tank 200 can be discharged evenly to avoid blockage. At the same time, the stirring shaft 502 drives the scraper 504 to rotate along the bottom of the inner cavity of the inner tank 202 to discharge the particles remaining in the inner tank 202.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A solution cooling crystallization apparatus for preparing o-tolueneacetic acid, comprising a support (100) and a crystallization tank (200); characterized in that: The crystallization tank (200) is fixedly connected to the inside of the support (100), and a cooling component (300) is fixedly connected to the back of the support (100). A cover (400) is installed at the bottom of the crystallization tank (200), and a stirring component (500) is provided inside the crystallization tank (200). The crystallization tank (200) includes an outer tank (201) fixedly connected to the inside of the support (100), an inner tank (202) fixedly connected to the inside of the outer tank (201), a discharge pipe (203) fixedly connected to the bottom of the inner tank (202), a tank cover (204) installed on the top of the outer tank (201), and a feed pipe (204b) fixedly connected to the top of the tank cover (204). The stirring assembly (500) includes a stirring motor (501) fixedly connected to the top of the bucket cover (204) and a stirring shaft (502) rotatably connected to the center of the bucket cover (204). The stirring shaft (502) is fixedly connected to the output end of the stirring motor (501). An auger rod (503) is fixedly connected to the bottom of the stirring shaft (502), and the lower end of the auger rod (503) is located inside the discharge pipe (203). A scraper (504) and multiple stirring paddles (505) are fixedly connected to the outside of the stirring shaft (502).

2. The solution cooling crystallization apparatus for preparing o-tolueneacetic acid according to claim 1, characterized in that, The cooling assembly (300) includes a water tank (301) located inside the bracket (100) and a radiator (303) fixedly connected to the back of the bracket (100). A circulation pump (302) is fixedly connected to the top of the water tank (301). A water pump pipe (305) is connected between the input end of the circulation pump (302) and the water tank (301). The input end of the radiator (303) is connected to the output end of the circulation pump (302). A water filling pipe (304) is connected between the output end of the radiator (303) and the lower outer end of the outer barrel (201). A water return pipe (306) is connected between the upper outer end of the outer barrel (201) and the top of the water tank (301).

3. The solution cooling crystallization apparatus for preparing o-tolueneacetic acid according to claim 1, characterized in that, The cover (400) includes a filter cover (401) rotatably connected to the bottom of the discharge pipe (203). The bottom of the filter cover (401) is rotatably connected to a bottom cover (406). A first fixing block (403) is fixedly connected to the outside of the discharge pipe (203). A second fixing block (407) is fixedly connected to the outside of the bottom cover (406). A first fastening bolt (404) is rotatably connected to the inside of the first fixing block (403). A second fastening bolt (408) is rotatably connected to the inside of the second fixing block (407). A fixing seat (402) is fixedly connected to the outside of the filter cover (401). Both the first fastening bolt (404) and the second fastening bolt (408) are threaded into the inside of the fixing seat (402).

4. The solution cooling crystallization apparatus for preparing o-tolueneacetic acid according to claim 1, characterized in that, The outer side of the inner barrel (202) is provided with multiple support plates (202a) at equal intervals along the circumference, and the support plates (202a) are in contact with the inner wall of the outer barrel (201).

5. The solution cooling crystallization apparatus for preparing o-tolueneacetic acid according to claim 1, characterized in that, The bottom of the bucket lid (204) is fixedly connected to a second sealing ring (204c) located on the top of the inner bucket (202) and a third sealing ring (204d) located on the top of the outer bucket (201).

6. The solution cooling crystallization apparatus for preparing o-tolueneacetic acid according to claim 3, characterized in that, The top of the filter cover (401) is fixedly connected to a fourth sealing ring (405), and the top of the bottom cover (406) is fixedly connected to a fifth sealing ring (409).

7. The solution cooling crystallization apparatus for preparing o-tolueneacetic acid according to claim 1, characterized in that, The scraper (504) includes a fixed sleeve (504a) fixedly connected to the outside of the stirring shaft (502) and a collar (504b) movably sleeved on the inner wall of the inner barrel (202). Multiple inclined rods (504c) are fixedly provided at equal intervals along the circumference of the fixed sleeve (504a) and the collar (504b). Multiple scraper strips (504d) are fixedly provided at equal intervals along the circumference of the bottom of the collar (504b), and the scraper strips (504d) are in contact with the bottom of the inner cavity of the inner barrel (202).

8. The solution cooling crystallization apparatus for preparing o-tolueneacetic acid according to claim 1, characterized in that, The top of the bucket lid (204) is fixedly connected to two lifting rings (204a), and the two lifting rings (204a) are symmetrically distributed.

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