Concentrated solution cooling and crystal growing device

Abstract

The utility model relates to a concentrated solution cooling and crystal growing device which comprises a concentration tank and a cooling and crystal growing groove which are connected in series, and is technically characterized in that the cooling and crystal growing groove is divided into a lower transition cooling area and an upper temperature gradual change area by a partition plate, a snake-shaped pipe bundle is arranged in the lower transition cooling area, and the inlet end of the snake-shaped pipe bundle is communicated with an outlet pipeline of a lifting pump; an inlet pipeline of the lifting pump is communicated with a discharging opening in the bottom of the concentration tank, the outlet end of the serpentine tube bundle is inserted into an upper temperature gradual change area, an upper cooling coil, a middle cooling coil and a lower cooling coil are arranged in the upper temperature gradual change area at intervals, and the temperatures of cooling media in the upper cooling coil, the middle cooling coil and the lower cooling coil are sequentially increased; the temperature of the cooling medium in the lower transition cooling area is higher than that of the cooling medium in the lowermost cooling coil, and a discharge port higher than the cooling coils in the vertical direction is formed in the side of the upper part of the cooling and crystal growing tank. And the production continuity is ensured, the crystal nucleus is prevented from being too large, and the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sulbactam sodium production equipment, in particular to a concentrated liquid cooling and crystal growing device. Background Art

[0002] Sulbactam sodium, a Western medicine name, is an enzyme inhibitor and is generally used in combination with penicillins or cephalosporins to treat urinary tract infections, lung infections, bronchial infections, ENT infections, abdominal and pelvic infections, biliary tract infections, sepsis, skin and soft tissue infections, etc. caused by sensitive bacteria. In the later stage of the production of sulbactam sodium, it is necessary to adsorb and filter impurities, and then introduce the filtrate into the crystallizer, slowly add the solvent while lowering the temperature to form a crystal slurry, and finally discharge the crystal slurry into the crystal growing device to form a crystalline product.

[0003] CN 212818234 U discloses a cooling crystallization device with a jacket, comprising a crystallization tank, a discharge port at the bottom of the crystallization tank, a fiber filter screen in the discharge port, a material extraction slot at the bottom of the crystallization tank, the material extraction slot is connected to the discharge port, and a jacket through which a cooling medium can pass is arranged outside the crystallization tank. The device can rapidly crystallize by injecting frozen brine by arranging a cooling jacket outside the crystallization tank, and can directly extract material and filter impurities after crystallization. However, the following problems still exist when it is used: the jacket provides cooling for the entire crystallization tank, and in order to avoid excessive cooling speed causing excessively large crystal nuclei, the cooling temperature should not be too high, and gradual cooling will affect production continuity and production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a concentrated liquid cooling and crystal growing device with a reasonable structure and reliable use to solve the above problems, while ensuring production continuity, avoiding excessive crystal nuclei and ensuring product quality.

[0005] The technical solution of the utility model is:

[0006] A concentrated liquid cooling and crystal growing device comprises a concentration tank and a cooling and crystal growing tank connected in series, and its technical key points are: the cooling and crystal growing tank is divided into a lower transition cooling zone and an upper temperature gradient zone by a partition, a serpentine tube bundle is arranged in the lower transition cooling zone, the inlet end of the serpentine tube bundle is connected to the outlet pipeline of a lifting pump, the inlet pipeline of the lifting pump is connected to the discharge port at the bottom of the concentration tank, the outlet end of the serpentine tube bundle is inserted into the upper temperature gradient zone, the upper temperature gradient zone is arranged with upper, middle and lower cooling coils at intervals, the temperatures of the cooling media in the upper, middle and lower cooling coils increase in sequence, the temperature of the cooling medium in the lower transition cooling zone is higher than the temperature of the cooling medium in the lowest cooling coil, and a discharge port is arranged on the upper side of the cooling and crystal growing tank, which is higher than the cooling coil in the vertical direction.

[0007] The above-mentioned concentrated liquid cooling and crystal growing device has a stirring motor at the top center of the cooling and crystal growing tank, and a stirring shaft connected to the output end of the stirring motor is provided in the cooling and crystal growing tank. A plurality of stirring paddles are provided on the stirring shaft, and the stirring paddles are located at the lower part of the upper temperature gradient zone or between two adjacent cooling coils.

[0008] The above-mentioned concentrated liquid cooling and crystal growing device has a tee at the discharge port of the concentration tank, one inlet of the tee is connected to the discharge port, the other inlet is connected to the cleaning pipeline, the outlet of the tee is connected to the inlet pipeline of the lift pump, the outlet end of the serpentine tube bundle is further connected to the cleaning water outlet pipeline, a first control valve is provided at the discharge port, a second control valve is provided on the cleaning pipeline, a third control valve is provided on the cleaning water outlet pipeline, and a fourth control valve is provided at the outlet end of the serpentine tube bundle.

[0009] The above-mentioned concentrated liquid cooling and crystal growing device has a heating interlayer on the outer wall of the concentration tank and a stirring mechanism inside the concentration tank.

[0010] The beneficial effects of the utility model are:

[0011] First, the material is introduced from the concentration tank into the lower transition cooling zone of the cooling crystal growing tank through the lifting pump, so that the high-temperature concentrated material is accelerated to cool down by the serpentine tube bundle, and then introduced into the upper temperature gradient zone through the serpentine tube bundle. During the process of the material rising from bottom to top, it is cooled by three cooling coils and gradually cooled down. The finished product is discharged from the discharge port at the top of the cooling crystal growing tank. Compared with the integrated jacket cooling, it ensures production continuity on the one hand, and avoids excessive crystal nuclei due to excessive cooling on the other hand, ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure: 1. Concentration tank, 2. Cleaning pipeline, 3. Second control valve, 4. First control valve, 5. Lifting pump, 6. Serpentine tube bundle, 7. Fourth control valve, 8. Cleaning water outlet pipeline, 9. Third control valve, 10. Stirring motor, 11. Discharge port, 12. Stirring paddle, 13. Cooling coil, 14. Cooling crystal growing tank, 15. Partition. DETAILED DESCRIPTION

[0014] The utility model is described in detail according to the accompanying drawings of the specification.

[0015] like Figure 1 As shown, the concentrated liquid cooling and crystal growing device comprises a concentration tank 1 and a cooling and crystal growing tank 14 connected in series.

[0016] The cooling crystal growing tank 14 is divided into a lower transition cooling zone and an upper temperature gradient zone by a partition 15. A serpentine tube bundle 6 is provided in the lower transition cooling zone, the inlet end of the serpentine tube bundle 6 is connected to the outlet pipeline of the lifting pump 5, the inlet pipeline of the lifting pump 5 is connected to the discharge port at the bottom of the concentration tank 1, and the outlet end of the serpentine tube bundle 6 is inserted into the upper temperature gradient zone. The upper temperature gradient zone is arranged with upper, middle and lower cooling coils 13 at intervals, and the temperature of the cooling medium in the upper, middle and lower cooling coils 13 increases successively, and the temperature of the cooling medium in the lower transition cooling zone is higher than the temperature of the cooling medium in the lowest cooling coil 13, and a discharge port 11 is provided on the upper side of the cooling crystal growing tank 14, which is higher than the cooling coil 13 in the vertical direction.

[0017] In this embodiment, a stirring motor 10 is provided at the top center of the cooling crystal growing tank 14, a stirring shaft connected to the output end of the stirring motor 10 is provided in the cooling crystal growing tank 14, a plurality of stirring paddles 12 are provided on the stirring shaft, and the stirring paddles 12 are located at the lower part of the upper temperature gradient zone or between two adjacent cooling coils 13. A heating interlayer is provided on the outer wall of the concentration tank 1, and a stirring mechanism is provided inside the concentration tank 1.

[0018] A tee is provided at the discharge port of the concentration tank 1, one inlet of the tee is connected to the discharge port, the other inlet is connected to the cleaning pipeline 2, the outlet of the tee is connected to the inlet pipeline of the lift pump 5, the outlet end of the serpentine tube bundle 6 is further connected to the cleaning water outlet pipeline 8, a first control valve 4 is provided at the discharge port, a second control valve 3 is provided on the cleaning pipeline 2, a third control valve 9 is provided on the cleaning water outlet pipeline 8, and a fourth control valve 7 is provided at the outlet end of the serpentine tube bundle 6.

[0019] Working principle:

[0020] During normal operation, the material is first introduced from the concentration tank 1 into the lower transition cooling zone of the cooling crystal growing tank 14 through the lifting pump 5, so that the high-temperature concentrated material is accelerated to cool by the serpentine tube bundle 6, and then introduced into the upper temperature gradient zone through the serpentine tube bundle 6. During the process of the material rising from bottom to top, it is cooled by the three cooling coils 13 and gradually cooled. The finished product is discharged from the discharge port 11 at the upper part of the cooling crystal growing tank 14. During this process, the stirring motor 10 drives the stirring paddle 12 to rotate to make the material cool evenly.

[0021] In order to avoid clogging of the serpentine tube bundle 6, the serpentine tube bundle 6 can be cleaned regularly. When cleaning, first close the first control valve 4 and the fourth control valve 7, open the second control valve 3 and the third control valve 9, start the lift pump 5, introduce clean water into the serpentine tube bundle 6 through the cleaning pipeline 2, and then discharge it from the cleaning water outlet pipeline 8 to achieve the cleaning purpose and ensure the feeding flow rate.

[0022] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A concentrated liquid cooling and crystal growing device, comprising a concentration tank and a cooling and crystal growing tank connected in series, characterized in that: The cooling and crystal growing tank is divided into a lower transition cooling zone and an upper temperature gradient zone by a partition. A serpentine tube bundle is provided in the lower transition cooling zone. The inlet end of the serpentine tube bundle is connected to the outlet pipeline of the lifting pump. The inlet pipeline of the lifting pump is connected to the discharge port at the bottom of the concentration tank. The outlet end of the serpentine tube bundle is inserted into the upper temperature gradient zone. The upper, middle and lower cooling coils are arranged at intervals in the upper temperature gradient zone. The temperatures of the cooling media in the upper, middle and lower cooling coils increase successively. The temperature of the cooling medium in the lower transition cooling zone is higher than the temperature of the cooling medium in the lowest cooling coil. A discharge port that is higher than the cooling coil in the vertical direction is provided on the upper side of the cooling and crystal growing tank.

2. The concentrated liquid cooling and crystal growing device according to claim 1, characterized in that: A stirring motor is provided at the top center of the cooling crystal growing tank, and a stirring shaft connected to the output end of the stirring motor is provided in the cooling crystal growing tank. A plurality of stirring paddles are provided on the stirring shaft, and the stirring paddles are located at the lower part of the upper temperature gradient zone or between two adjacent cooling coils.

3. The concentrated liquid cooling and crystal growing device according to claim 1, characterized in that: A tee is provided at the discharge port of the concentration tank, one inlet of the tee is connected to the discharge port, the other inlet is connected to the cleaning pipeline, the outlet of the tee is connected to the inlet pipeline of the lift pump, the outlet end of the serpentine tube bundle is further connected to the cleaning water outlet pipeline, a first control valve is provided at the discharge port, a second control valve is provided on the cleaning pipeline, a third control valve is provided on the cleaning water outlet pipeline, and a fourth control valve is provided at the outlet end of the serpentine tube bundle.

4. The concentrated liquid cooling and crystal growing device according to claim 1, characterized in that: The outer wall of the concentration tank is provided with a heating interlayer, and the interior of the concentration tank is provided with a stirring mechanism.

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