A cooling crystallization system

Abstract

The utility model relates to a cooling crystallization system, it includes: cooling crystallizer, inside is provided with crystallizing chamber, the bottom of crystallizing chamber is provided with the upward bulge's backflush baffle, the lower extreme of cooling crystallizer is equipped with the discharge gate, cooling crystallizer is equipped with circulating feed port and circulating discharge gate, the circulating feed port is connected with the inner circulating flow guide vanes that extend to the crystallizing chamber bottom on, material circulation pipe is set up in the outside of cooling crystallizer, material circulation pipe is connected between circulating feed port and circulating discharge gate, and material circulation pump is installed on material circulation pipe. The circulating material is descended through the inner circulating flow guide vanes, and the backstroke rises after the impact of backflush baffle, and the crystal of the bigger particle size falls by the weight and is discharged by the discharge pump, and the mother liquor containing fine crystal enters the circulating feed port, and circulates in the cooling crystallization system through the work of circulating pump, and mixes with the new material liquid into the system, so that the small crystal further grows.

Description

Technical Field

[0001] This utility model relates to the field of cooling crystallization, and specifically to a cooling crystallization system. Background Technology

[0002] Currently, conventional cooling crystallization uses forced circulation crystallizers (FC crystallizers). FC crystallizers are fully mixed-flow crystallizers, where the crystallized particles circulate under the action of a forced circulation pump. This forced circulation reduces the residence time of the crystallized particles and increases turbulence, resulting in insufficient crystal growth time. Furthermore, the shearing action of the circulation pump impeller easily wears down the crystallized particles, leading to small and uneven particle size in the final product. Utility Model Content

[0003] Based on the above description, this utility model provides a cooling crystallization system to solve the problems of small particle size and uneven particle size in related technologies.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A cooling crystallization system, comprising: a cooling crystallizer, which has a crystallization chamber inside, and a backflushing baffle plate protruding upward at the bottom of the crystallization chamber; a discharge port at the lower end of the cooling crystallizer; a circulating feed port and a circulating discharge port of the cooling crystallizer; and an inner circulating guide tube extending towards the bottom of the crystallization chamber connected to the circulating feed port; and a material circulation pipe disposed outside the cooling crystallizer, which is connected between the circulating feed port and the circulating discharge port, and a material circulation pump installed on the material circulation pipe.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, a support lug is provided on one side of the cooling crystallizer, and a material temperature monitoring sensor interface is installed inside the support lug.

[0007] Furthermore, each side of the cooling crystallizer is provided with a circulating discharge port, and the included angle between the two circulating discharge ports is 90~180°.

[0008] Furthermore, a cooling heat exchanger is installed on the material circulation pipe.

[0009] Furthermore, a refrigerant circulation pipe is connected to the material circulation pipe, and a refrigerant circulation pump is installed on the refrigerant circulation pipe.

[0010] Furthermore, the discharge port is connected to a discharge pump via a pipe.

[0011] Furthermore, a maintenance manhole is provided on one side of the cooling crystallizer.

[0012] Furthermore, the upper end of the cooling crystallizer is provided with an overflow port.

[0013] Furthermore, the top of the cooling crystallizer is provided with a feed inlet, and a liquid level sensor interface is installed inside the feed inlet.

[0014] Furthermore, the top of the cooling crystallizer is provided with an exhaust port.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] The circulating material descends through the internal circulation guide tube, impacts the backflushing baffle, and rises back up. Larger crystals are discharged by the discharge pump after falling due to their own weight, reducing the wear of the circulation pump impeller. Meanwhile, the mother liquor containing fine crystals enters the circulation inlet, circulates in the cooling crystallization system through the work of the circulation pump, and mixes with the newly entering liquid, extending the residence time of the particles and allowing the small crystals to grow further and become more uniform. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the cooling crystallization system provided in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the cooling crystallizer provided in an embodiment of the present invention;

[0019] Figure 3 A partition diagram of a cooling crystallizer provided in an embodiment of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Cooling crystallizer; 2. Material circulation pipe; 3. Cooling heat exchanger; 4. Refrigerant circulation pipe; 5. Refrigerant circulation pump; 6. Material circulation pump; 7. Discharge pump;

[0022] 101. Exhaust port; 102. Feed inlet; 103. Circulating discharge port; 104. Material temperature monitoring sensor interface; 105. Support lug; 106. Crystallization chamber; 107. Inspection manhole; 108. Backflush baffle; 109. Liquid level sensor interface; 110. Overflow port; 111. Circulating feed inlet; 112. Internal circulation guide tube; 113. Discharge port. Detailed Implementation

[0023] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0024] This utility model provides a cooling crystallization system that can solve the problems of small product particles and uneven particle size in related technologies.

[0025] See Figure 1 , Figure 2 and Figure 3 As shown, a cooling crystallization system provided in this embodiment of the present invention includes: a cooling crystallizer 1, which has a crystallization chamber 106 inside. The bottom of the crystallization chamber 106 is provided with an upwardly protruding backflushing baffle 108. The lower end of the cooling crystallizer 1 is provided with a discharge port 113. The cooling crystallizer 1 is provided with a circulating feed port 111 and a circulating discharge port 103. An inner circulating guide tube 112 extending towards the bottom of the crystallization chamber 106 is connected to the circulating feed port 111; a material circulation pipe 2 is provided outside the cooling crystallizer 1. The material circulation pipe 2 is connected between the circulating feed port 111 and the circulating discharge port 103. A material circulation pump 6 is installed on the material circulation pipe 2. In this embodiment, the circulating material descends through the inner circulation guide tube 112, impacts the backflushing baffle 108, and then rises back up. The backflushing baffle 108 backflushes the feed from the inner circulation guide tube 112 into the settling zone of the crystallization chamber 106, screening the crystals. Larger crystals fall into the crystallization growth and grading zone due to their own weight, and the standard large crystal particles are discharged from the system through the discharge port 113, reducing the wear of the circulation pump impeller. Meanwhile, the mother liquor containing fine crystals enters the circulation feed port 111 and circulates in the cooling crystallization system by the work done by the material circulation pump 6. During the rising process, the flow rate is controlled by the frequency conversion adjustment of the circulation pump, and it mixes with the newly entered material liquid, extending the residence time of the particles and allowing the small crystals to grow further and become more uniform.

[0026] See Figure 2 As shown, in some embodiments, a support ear 105 is provided on one side of the cooling crystallizer 1, and a material temperature monitoring sensor interface 104 is installed in the support ear 105 for monitoring the material temperature and facilitating the control of the temperature of the cooling crystallization system.

[0027] See Figure 2 As shown, in some embodiments, the cooling crystallizer 1 is provided with a circulation outlet 103 on each side, and the included angle between the two circulation outlets 103 is 90~180°, which can reduce the dead zone of the circulating material and prevent short flow.

[0028] See Figure 1 As shown, in some embodiments, a cooling heat exchanger 3 is installed on the material circulation pipe 2. The temperature is reduced and the supersaturation is increased by the cooling heat exchanger 3, which allows the small crystals to grow further.

[0029] See Figure 1As shown, in some embodiments, a refrigerant circulation pipe 4 is connected to the material circulation pipe 2, and a refrigerant circulation pump 5 is installed on the refrigerant circulation pipe 4 to realize refrigerant circulation.

[0030] See Figure 1 As shown, in some embodiments, the discharge port 113 is connected to the discharge pump 7 via a pipe. Multiple discharge ports 113 can be provided and all are connected to the discharge pump 7. After the crystal is formed, it can be discharged by the discharge pump 7.

[0031] See Figure 2 As shown, in some embodiments, a maintenance manhole 107 is provided on one side of the cooling crystallizer 1. The maintenance manhole 107 is horizontally positioned for easy maintenance.

[0032] See Figure 2 As shown, in some embodiments, the upper end of the cooling crystallizer 1 is provided with an overflow port 110 to prevent overflow.

[0033] See Figure 2 As shown, in some embodiments, the top of the cooling crystallizer 1 is provided with a feed inlet 102, and a liquid level sensor interface 109 is installed in the feed inlet 102 for monitoring the liquid level and facilitating control of the liquid level in the crystallization chamber 106.

[0034] See Figure 2 As shown, in some embodiments, the top of the cooling crystallizer 1 is provided with an exhaust port 101 for exhausting air, thereby regulating the air pressure in the crystallization chamber 106.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0036] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0037] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0038] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cooling crystallization system, characterized in that, It includes: The cooling crystallizer (1) has a crystallization chamber (106) inside. The bottom of the crystallization chamber (106) is provided with an upwardly protruding backflushing baffle (108). The lower end of the cooling crystallizer (1) is provided with a discharge port (113). The cooling crystallizer (1) is provided with a circulating feed port (111) and a circulating discharge port (103). An inner circulating guide tube (112) extending to the bottom of the crystallization chamber (106) is connected to the circulating feed port (111). The material circulation pipe (2) is located outside the cooling crystallizer (1). The material circulation pipe (2) is connected between the circulation inlet (111) and the circulation outlet (103). A material circulation pump (6) is installed on the material circulation pipe (2).

2. The cooling crystallization system according to claim 1, characterized in that: A support ear (105) is provided on one side of the cooling crystallizer (1), and a material temperature monitoring sensor interface (104) is installed in the support ear (105).

3. The cooling crystallization system according to claim 1, characterized in that: The cooling crystallizer (1) has a circulating discharge port (103) on each side, and the included angle between the two circulating discharge ports (103) is 90~180°.

4. The cooling crystallization system according to claim 1, characterized in that: A cooling heat exchanger (3) is installed on the material circulation pipe (2).

5. The cooling crystallization system according to claim 1, characterized in that: The material circulation pipe (2) is connected to a refrigerant circulation pipe (4), and a refrigerant circulation pump (5) is installed on the refrigerant circulation pipe (4).

6. The cooling crystallization system according to claim 1, characterized in that: The discharge port (113) is connected to a discharge pump (7) via a pipe.

7. The cooling crystallization system according to claim 1, characterized in that: The cooling crystallizer (1) is provided with a maintenance manhole (107) on one side.

8. The cooling crystallization system according to claim 1, characterized in that: The upper end of the cooling crystallizer (1) is provided with an overflow port (110).

9. The cooling crystallization system according to claim 1, characterized in that: The top of the cooling crystallizer (1) is provided with a feed inlet (102), and a liquid level sensor interface (109) is installed in the feed inlet (102).

10. The cooling crystallization system according to claim 1, characterized in that: The top of the cooling crystallizer (1) is provided with an exhaust port (101).

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