A vacuum crystallizer

Abstract

The utility model relates to crystallizer technical field, the embodiment of utility model provides a kind of vacuum crystallizer, including crystallizer and evaporation chamber, the bottom of the evaporation chamber is fixedly connected in the top of crystallizer, the circumferential surface of the crystallizer is fixedly penetrated with connecting pipe, the inside of the crystallizer is provided with circulating mechanism.In the utility model, when using crystallizer, staff adds material through mother liquor import, material and material liquid are mixed and then enter circulating pump, are heated through heat exchanger, finally enter crystallizer through export, the negative pressure state in crystallizer makes solution boiling point reduce, produces supersaturation, solution slides to central circulating pipe through hopper, eliminates supersaturation after crystal bed, crystal grows, finished product is taken out from lower export, solution enters next cycle through circulating pipe, through above technical scheme, the technical problem of the problem that condenser is easily blocked in crystallizer in related art is solved.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of crystallizer technology, specifically to a vacuum crystallizer. Background Technology

[0002] A vacuum crystallizer is a device used for crystallizing solutes in solutions or melts. It works by reducing pressure to force the solute to crystallize out of the solution. This equipment is widely used in chemical engineering, pharmaceuticals, food processing, and other fields, especially in applications requiring crystallization at low temperatures.

[0003] Existing OSLO crystallizers are typically cooling crystallizers. Generally, the feed liquid is mixed with circulating mother liquor and pumped into a condenser to cool the circulating mother liquor. As the mother liquor temperature decreases, supersaturation occurs in the condenser, leading to the formation of crystals in the circulating mother liquor. Therefore, a high-performance circulating pump is required; otherwise, the crystals in the circulating mother liquor will collide with the pump impeller, producing fine crystal particles. Improper operation can also easily cause the condenser to become clogged by crystals. Utility Model Content

[0004] To overcome the above-mentioned defects, embodiments of this utility model provide a vacuum crystallizer, which solves the problem of easy clogging of the external condenser in crystallizers in related technologies.

[0005] According to one aspect, at least one embodiment of the present invention provides a vacuum crystallizer, including a crystallizer and an evaporation chamber, wherein the bottom of the evaporation chamber is fixedly connected to the top of the crystallizer, a connecting pipe is fixedly passed through the circumferential surface of the crystallizer, and one end of the connecting pipe away from the circumferential surface of the crystallizer is fixedly passed through the circumferential surface of the evaporation chamber, and a circulation mechanism is provided inside the crystallizer. The circulation mechanism includes a circulation pipe, the inlet of which is fixedly inserted through the circumference of the crystallizer, a circulation pump is provided on the circumference of the circulation pipe, the outlet of the circulation pipe is fixedly inserted through the circumference of the crystallizer, an mounting plate is fixedly connected to the bottom of the circulation pump, a heat exchanger is provided on the circumference of the circulation pipe, a funnel is fixedly connected inside the crystallizer, and a central circulation pipe is fixedly inserted through the bottom of the funnel.

[0006] For example, in at least one embodiment of the present invention, a vacuum crystallizer is provided, which further includes: the crystallizer is a cylinder with the same diameter, a protrusion is fixedly connected inside the crystallizer, and a manhole is provided at the bottom of the crystallizer and the top of the evaporation chamber. The protrusion facilitates the flow of circulating liquid and prevents crystals from accumulating at the bottom. The manhole facilitates observation and maintenance.

[0007] The crystallizer has a finished product outlet on its circumferential surface, and the circulation pipe has a mother liquor inlet on its circumferential surface. The finished product outlet is used to draw the finished product out from the bottom of the crystallizer.

[0008] The manhole is rotatably connected to a support shaft, and a cover plate is fixedly connected to the circumferential surface of the support shaft. The purpose of this is to seal the manhole and prevent debris from entering the crystallizer through the manhole.

[0009] The outlet of the circulation pipe is located directly above the funnel. The diameter of the cover plate is the same as the opening size of the manhole. The purpose is to ensure that the heated material can fall into the funnel and that the cover plate can fit and seal with the manhole.

[0010] According to another aspect, at least one embodiment of the present invention also provides a vacuum crystallizer, including a steam treatment mechanism. The steam treatment mechanism includes a mounting box, which is fixedly connected to the circumferential surface of an evaporation chamber. A motor is fixedly connected inside the mounting box, and a rotating shaft is fixedly connected to the output end of the motor. A gear A is fixedly passed through the circumferential surface of the rotating shaft. A control shaft is rotatably connected through the inner wall of the mounting box, and a gear B is fixedly passed through the circumferential surface of the control shaft. A mounting plate is fixedly connected to the circumferential surface of the control shaft, and a fan blade is fixedly connected to the circumferential surface of the mounting plate, the purpose of which is to improve the discharge of steam.

[0011] For example, in at least one embodiment of the present invention, a vacuum crystallizer is provided, which further includes: a sliding groove is provided inside the evaporation chamber, a scraper is slidably connected inside the sliding groove, and a push rod is fixedly connected to the circumferential surface of the control shaft. The purpose is to scrape off the droplets stuck inside the evaporation chamber to avoid making them difficult to remove.

[0012] A return spring is fixedly connected inside the chute. The end of the return spring away from the inside of the chute is fixedly connected to the bottom of the scraper. The purpose of this is to ensure that the return spring can automatically reset and reduce manual intervention.

[0013] The number of control shafts, gear B, and mounting plates is set to two, and they are symmetrical to each other along the vertical central axis of the crystallizer. The initial state of the reset spring is relaxed, which is intended to improve the exhaust effect.

[0014] The circumferential surfaces of gear A and gear B mesh with each other. The top of the scraper is located on the displacement trajectory of the push rod. A steam outlet is provided at the top of the evaporation chamber. The purpose of this is to ensure that the rotation of gear A can drive gear B to rotate, and to ensure that the rotation of the push rod can push the scraper.

[0015] The beneficial effects of the embodiments of this utility model are as follows: 1. In this utility model, through the cooperation of components such as the circulation pipe, central circulation pipe, and heat exchanger of the circulation mechanism, when using the crystallizer, the operator adds materials through the mother liquor inlet. After the materials are mixed with the liquid, they enter the circulation pump, are heated by the heat exchanger, and finally enter the crystallizer through the outlet. The negative pressure state inside the crystallizer lowers the boiling point of the solution and produces supersaturation. The solution slides through the funnel to the central circulation pipe, passes through the crystal bed to eliminate supersaturation, and the crystals grow. The finished product is taken out from the lower outlet, and the solution enters the next cycle through the circulation pipe. This design solves the problem of easy clogging of the external condenser of the crystallizer and makes the equipment easy to operate.

[0016] 2. In this utility model, through the cooperation between the components such as the motor, gear A, and fan blades of the steam treatment mechanism, when the crystallizer is working, the motor is started to drive the rotating shaft to rotate, which in turn drives the control shaft to rotate through gear A and gear B. The control shaft drives the fan blades to rotate, promoting steam circulation, carrying away the heat of the solution, and discharging it through the steam outlet. The rotating control shaft also drives the push rod to push the scraper to scrape off the splashed liquid on the inner wall of the evaporation chamber, preventing adhesion and keeping it clean. This design achieves the effect of circulating and treating steam, effectively improving the heat exchange between steam and solution and the cleanliness of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0018] Figure 1 This is a structural schematic diagram of the three-dimensional appearance of the present invention from a first-person perspective; Figure 2 This is a first-person three-dimensional cross-sectional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention from a second-view three-dimensional cross-section; Figure 4 This utility model Figure 2 A three-dimensional magnified structural diagram of A in the middle; Figure 5 This utility model Figure 3 A three-dimensional magnified structural diagram of B.

[0019] In the diagram: 1. Crystallizer; 2. Evaporation chamber; 3. Connecting pipe; 4. Circulation mechanism; 41. Circulation pipe; 42. Circulation pump; 43. Mounting plate; 44. Heat exchanger; 45. Funnel; 46. Central circulation pipe; 47. Protrusion; 48. Manhole; 49. Finished product outlet; 410. Mother liquor inlet; 411. Support shaft; 412. Cover plate; 5. Steam treatment mechanism; 51. Mounting box; 52. Motor; 53. Rotating shaft; 54. Gear A; 55. Control shaft; 56. Gear B; 57. Mounting plate; 58. Fan blade; 59. Slide groove; 510. Scraper; 511. Push rod; 512. Return spring; 513. Steam outlet. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0021] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figures 1-5 As shown, it illustrates a vacuum crystallizer according to an embodiment of the present invention, including a crystallizer 1 and an evaporation chamber 2. The bottom of the evaporation chamber 2 is fixedly connected to the top of the crystallizer 1. A connecting pipe 3 is fixedly passed through the circumferential surface of the crystallizer 1. One end of the connecting pipe 3 away from the circumferential surface of the crystallizer 1 is fixedly passed through the circumferential surface of the evaporation chamber 2. A circulation mechanism 4 is provided inside the crystallizer 1. The circulation mechanism 4 includes a circulation pipe 41, the inlet of which is fixedly inserted through the circumferential surface of the crystallizer 1, a circulation pump 42 is provided on the circumferential surface of the circulation pipe 41, the outlet of the circulation pipe 41 is fixedly inserted through the circumferential surface of the crystallizer 1, an mounting plate 43 is fixedly connected to the bottom of the circulation pump 42, a heat exchanger 44 is provided on the circumferential surface of the circulation pipe 41, a funnel 45 is fixedly connected inside the crystallizer 1, and a central circulation pipe 46 is fixedly inserted through the bottom of the funnel 45.

[0027] In some examples, the crystallizer 1 is a cylindrical shape with the same diameter. The crystallizer 1 is fixedly connected with a protrusion 47 inside. The bottom of the crystallizer 1 and the top of the evaporation chamber 2 are provided with manholes 48. The protrusion 47 is used to facilitate the flow of circulating liquid and prevent crystals from accumulating at the bottom. The manhole 48 is convenient for observation and maintenance.

[0028] The crystallizer 1 has a finished product outlet 49 on its circumferential surface, and the circulation pipe 41 has a mother liquor inlet 410 on its circumferential surface. The finished product outlet 49 is used to draw the finished product out from the bottom of the crystallizer 1.

[0029] The manhole 48 is rotatably connected to a support shaft 411, and a cover plate 412 is fixedly connected to the circumferential surface of the support shaft 411. The purpose of this is to seal the manhole 48 and prevent foreign objects from entering the crystallizer 1 through the manhole 48.

[0030] The outlet of the circulation pipe 41 is located directly above the funnel 45. The diameter of the cover plate 412 is the same as the opening size of the manhole 48. The purpose is to ensure that the heated material can fall into the funnel 45 and that the cover plate 412 can fit and seal with the manhole 48.

[0031] For example, such as Figures 1-5 As shown, when crystallizer 1 is needed, the operator adds material through mother liquor inlet 410. The newly added material enters circulation pipe 41 and mixes with the liquid coming out of crystallizer 1, then enters circulation pump 42. The mixture is pumped through circulation pump 42 and heated inside heat exchanger 44. Then it enters crystallizer 1 through circulation pipe 41 outlet. Crystallizer 1 is in a negative pressure vacuum state, which lowers the boiling point of the solution and causes flash evaporation, thereby making the liquid supersaturated. The supersaturated solution slides down through funnel 45 into central circulation pipe 46 and moves downward. After passing through crystal bed, the supersaturation of the circulating liquid is eliminated, allowing the crystals to grow. The finished product is taken out from finished product outlet 49 at the bottom of crystallizer 1, and the solution at the top enters the next cycle through circulation pipe 41.

[0032] like Figures 1-5 As shown, a vacuum crystallizer is illustrated in another embodiment of this utility model. It is largely the same as the above-described technical solution, so only the differences are described. It includes a steam treatment mechanism 5, which includes a mounting box 51. The mounting box 51 is fixedly connected to the circumferential surface of the evaporation chamber 2. A motor 52 is fixedly connected inside the mounting box 51. A rotating shaft 53 is fixedly connected to the output end of the motor 52. A gear A54 is fixedly passed through the circumferential surface of the rotating shaft 53. A control shaft 55 is rotatably connected through the inner wall of the mounting box 51. A gear B56 is fixedly passed through the circumferential surface of the control shaft 55. A mounting plate 57 is fixedly connected to the circumferential surface of the control shaft 55. A fan blade 58 is fixedly connected to the circumferential surface of the mounting plate 57, the purpose of which is to improve the steam discharge.

[0033] In some examples, the evaporation chamber 2 is provided with a groove 59 inside, a scraper 510 is slidably connected inside the groove 59, and a push rod 511 is fixedly connected to the circumferential surface of the control shaft 55. The purpose is to scrape off the droplets stuck inside the evaporation chamber 2 to avoid making them difficult to remove.

[0034] A return spring 512 is fixedly connected inside the slide 59. The end of the return spring 512 away from the inside of the slide 59 is fixedly connected to the bottom of the scraper 510. The purpose is to ensure that the return spring 512 can automatically reset and reduce manual intervention.

[0035] The number of control shaft 55, gear B56 and mounting plate 57 is set to two, and they are symmetrical to each other along the vertical central axis of crystallizer 1. The initial state of reset spring 512 is relaxed, which is to improve the exhaust effect.

[0036] The circumferential surface of gear A54 meshes with the circumferential surface of gear B56. The top of scraper 510 is located on the displacement trajectory of push rod 511. A steam outlet 513 is provided at the top of evaporation chamber 2. The purpose is to ensure that the rotation of gear A54 can drive gear B56 to rotate, and to ensure that the rotation of push rod 511 can push scraper 510.

[0037] For example, such as Figures 1-5 As shown, when crystallizer 1 is working, the operator can start motor 52. The output end of motor 52 rotates, driving shaft 53 to rotate. Shaft 53 rotates, driving gear A54 to rotate. Gear A54 meshes with gear B56, causing gear B56 to rotate. Gear B56 rotates, driving control shaft 55 to rotate. Control shaft 55 rotates, driving fan blade 58 to rotate via mounting plate 57. The rotation of fan blade 58 ensures that the flash-evaporated steam is fully circulated. The ring floats, effectively removing heat from the solution and allowing steam to be effectively discharged through the steam outlet 513. The control shaft 55 rotates, driving the push rod 511 to rotate. During the rotation of the push rod 511, the scraper 510 is pushed, causing the scraper 510 to move within the slide groove 59 under force. The scraper 510 then scrapes away the splashed liquid on the inner wall of the evaporation chamber 2, preventing the liquid from sticking to the inner wall of the evaporation chamber 2 and causing a situation that is difficult to remove. When the scraper 510 is no longer under force, it is reset by the elasticity of the return spring 512.

[0038] 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 vacuum crystallizer characterized by, It includes a crystallizer (1) and an evaporation chamber (2). The bottom of the evaporation chamber (2) is fixedly connected to the top of the crystallizer (1). A connecting pipe (3) is fixedly passed through the circumferential surface of the crystallizer (1). One end of the connecting pipe (3) away from the circumferential surface of the crystallizer (1) is fixedly passed through the circumferential surface of the evaporation chamber (2). A circulation mechanism (4) is provided inside the crystallizer (1). The circulation mechanism (4) includes a circulation pipe (41), the inlet of which is fixedly inserted through the circumferential surface of the crystallizer (1), a circulation pump (42) is provided on the circumferential surface of the circulation pipe (41), the outlet of which is fixedly inserted through the circumferential surface of the crystallizer (1), an mounting plate (43) is fixedly connected to the bottom of the circulation pump (42), a heat exchanger (44) is provided on the circumferential surface of the circulation pipe (41), a funnel (45) is fixedly connected inside the crystallizer (1), and a central circulation pipe (46) is fixedly inserted through the bottom of the funnel (45).

2. A vacuum crystalliser according to claim 1, characterised in that The crystallizer (1) is a cylindrical shape with the same diameter. A protrusion (47) is fixedly connected inside the crystallizer (1). Manholes (48) are provided at the bottom of the crystallizer (1) and the top of the evaporation chamber (2).

3. A vacuum crystalliser according to claim 2, characterised in that The crystallizer (1) has a finished product outlet (49) on its circumferential surface, and the circulation pipe (41) has a mother liquor inlet (410) on its circumferential surface.

4. A vacuum crystalliser according to claim 3, characterised in that The manhole (48) is rotatably connected to a support shaft (411), and a cover plate (412) is fixedly connected to the circumferential surface of the support shaft (411).

5. A vacuum crystalliser according to claim 4, characterised in that The outlet of the circulation pipe (41) is located directly above the funnel (45), and the diameter of the cover plate (412) is the same as the opening size of the manhole (48).

6. A vacuum crystalliser according to claim 5, characterised in that The evaporation chamber (2) is equipped with a steam treatment mechanism (5). The steam treatment mechanism (5) includes a mounting box (51). The mounting box (51) is fixedly connected to the circumferential surface of the evaporation chamber (2). A motor (52) is fixedly connected inside the mounting box (51). A rotating shaft (53) is fixedly connected to the output end of the motor (52). A gear A (54) is fixedly passed through the circumferential surface of the rotating shaft (53). A control shaft (55) is rotatably connected through the inner wall of the mounting box (51). A gear B (56) is fixedly passed through the circumferential surface of the control shaft (55). A mounting plate (57) is fixedly connected to the circumferential surface of the control shaft (55). A fan blade (58) is fixedly connected to the circumferential surface of the mounting plate (57).

7. A vacuum crystalliser according to claim 6, characterised in that The evaporation chamber (2) has a sliding groove (59) inside, and a scraper (510) is slidably connected inside the sliding groove (59). A push rod (511) is fixedly connected to the circumferential surface of the control shaft (55).

8. A vacuum crystalliser according to claim 7, characterised in that A return spring (512) is fixedly connected inside the slide groove (59), and one end of the return spring (512) away from the inside of the slide groove (59) is fixedly connected to the bottom of the scraper (510).

9. A vacuum crystalliser according to claim 8, characterised in that The number of the control shaft (55), gear B (56) and mounting plate (57) is set to two, and they are symmetrical to each other along the vertical central axis of the crystallizer (1). The initial state of the reset spring (512) is relaxed.

10. A vacuum crystalliser according to claim 9, characterised in that The circumferential surface of gear A (54) meshes with the circumferential surface of gear B (56), the top of scraper (510) is located on the displacement trajectory of push rod (511), and the top of evaporation chamber (2) is provided with steam outlet (513).

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