A heat exchange system for a freeze-recrystallization process

Abstract

This utility model discloses a heat exchange system for a freeze-crystallization process, belonging to the field of recrystallization technology. It includes a heat exchange chamber, with a heat exchange pipe assembly fixedly connected inside. The top of the heat exchange pipe assembly is connected to an inlet pipe, and the bottom of the heat exchange pipe assembly is connected to an outlet pipe. Multiple refrigerant nozzles are located inside the left side of the heat exchange chamber. A connector fixed to the outer wall of the heat exchange chamber is located to the left of each refrigerant nozzle. The left end of the connector is connected to a refrigerant inlet pipe, and the right side of the heat exchange chamber is connected to a refrigerant outlet pipe. An air compressor is connected to the end of the refrigerant outlet pipe, and the outlet of the air compressor is connected to the refrigerant inlet pipe. This utility model has high refrigeration efficiency and good refrigeration effect, thereby improving the recrystallization efficiency of saturated salt solutions.

Description

Technical Field

[0001] This utility model relates to the field of recrystallization technology, specifically to a heat exchange system for a freeze recrystallization process. Background Technology

[0002] Recrystallization is a process that utilizes the different solubilities of the components in a solid mixture in a certain solvent to dissolve the solid mixture in a hot solvent to prepare a saturated solution.

[0003] The insoluble impurities are removed by hot filtration, and then the filtrate is cooled, causing the solutes with high solubility that change with temperature to crystallize out, while the impurities with low solubility remain in the solution, thus achieving the purpose of separation and purification.

[0004] A heat exchange system is a device or system used to transfer heat between fluids or objects at different temperatures. In the recrystallization process, the main function of the heat exchange system is to control the temperature during crystallization, bringing the solution to a supersaturated state through heating or cooling, thereby promoting crystal formation and growth, while ensuring that the crystallization process takes place under suitable temperature conditions to obtain the desired crystal product.

[0005] In existing heat exchange systems, refrigerant compression is mostly done by piston compressors. Piston compressors have low compression efficiency, which leads to low heat exchange efficiency of the heat exchange system and consequently low recrystallization efficiency. Therefore, a heat exchange system for the cryogenic recrystallization process is needed. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a heat exchange system for a freeze recrystallization process.

[0007] The technical solution of this utility model is: a heat exchange system for a freeze-recrystallization process, comprising a heat exchange chamber, a heat exchange pipe assembly fixedly connected inside the heat exchange chamber, an inlet pipe connected to the top of the heat exchange pipe assembly, an outlet pipe connected to the bottom of the heat exchange pipe assembly, multiple refrigerant nozzles provided inside the left side of the heat exchange chamber, a connector fixed to the outer wall of the heat exchange chamber on the left side of each refrigerant nozzle, a refrigerant inlet pipe connected to the left end of the connector, a refrigerant outlet pipe connected to the right side of the heat exchange chamber, an air compressor connected to the end of the refrigerant outlet pipe, and the outlet of the air compressor connected to the refrigerant inlet pipe.

[0008] Furthermore, the heat exchange pipe assembly includes a pipe body coiled within the heat exchange chamber, and a connecting rod for securing the pipe body.

[0009] Note: The tube body is fixed inside the heat exchange chamber by the connecting rod, so that the outer wall of the tube body is in full contact with the refrigerant.

[0010] Furthermore, the connector includes a housing with a cavity, the right side of which is connected to the refrigerant nozzle, and the left side of which is connected to the refrigerant inlet pipe.

[0011] Explanation: Refrigerant is sprayed out through multiple refrigerant nozzles to rapidly cool the heat exchange chamber.

[0012] Furthermore, the air compressor includes a base, on which four compression cylinders are fixed. A screw is rotatably connected inside each compression cylinder, with the screw threads being looser on the left and tighter on the right. An air inlet branch pipe is connected to the upper left side of each compression cylinder, and the end of the air inlet branch pipe is connected to the refrigerant outlet pipe. A liquid outlet branch pipe is connected to the lower right side of each compression cylinder, and the end of the liquid outlet branch pipe is connected to the refrigerant inlet pipe. A rotary motor for driving the four screws to rotate is provided on the right side of the base.

[0013] Explanation: The motor drives the screw to rotate, which compresses the refrigerant. The refrigerant vaporizes and absorbs heat, cooling the heat exchange chamber and thus the saturated salt solution that needs to be crystallized.

[0014] Furthermore, the base is equipped with cooling fans in the front, rear, and top directions for heat dissipation of the compression cylinder.

[0015] Note: The air compressor is cooled by multiple cooling fans.

[0016] The beneficial effects of this utility model are:

[0017] This invention employs a screw rotation to continuously compress the refrigerant, resulting in high refrigerant compression efficiency and thus improving the refrigeration effect. The refrigerant vaporizes in the heat exchange chamber, absorbing heat during vaporization to cool the saturated salt solution that needs cooling, thereby causing crystals to precipitate. This invention has high refrigeration efficiency and good refrigeration effect, thereby improving the recrystallization efficiency of the saturated salt solution. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Among them, 1-heat exchange chamber, 2-heat exchange pipeline assembly, 3-liquid inlet pipe, 4-liquid outlet pipe, 5-refrigerant nozzle, 6-connector, 7-refrigerant inlet pipe, 8-refrigerant outlet pipe, 9-air compressor, 21-pipe body, 22-connecting rod, 61-cavity, 62-shell, 91-base, 92-compression cylinder, 93-screw, 94-inlet branch pipe, 95-liquid outlet branch pipe, 96-rotating motor, 97-cooling fan. Detailed Implementation

[0020] Example 1:

[0021] like Figure 1As shown, a heat exchange system for a cryogenic recrystallization process includes a heat exchange chamber 1. A heat exchange pipe assembly 2 is fixedly connected inside the heat exchange chamber 1. An inlet pipe 3 is connected to the top of the heat exchange pipe assembly 2, and an outlet pipe 4 is connected to the bottom of the heat exchange pipe assembly 2. Multiple refrigerant nozzles 5 are provided inside the left side of the heat exchange chamber 1. A connector 6 is fixed to the outer wall of the heat exchange chamber 1 on the left side of the refrigerant nozzles 5. A refrigerant inlet pipe 7 is connected to the left end of the connector 6. A refrigerant outlet pipe 8 is connected to the right side of the heat exchange chamber 1. An air compressor 9 is connected to the end of the refrigerant outlet pipe 8. The outlet of the air compressor 9 is connected to the refrigerant inlet pipe 7.

[0022] The heat exchange pipe assembly 2 includes a pipe body 21 coiled inside the heat exchange chamber 1, and a connecting rod 22 for fixing the pipe body 21.

[0023] The tube body 21 is fixed inside the heat exchange chamber 1 by the connecting rod 22, so that the outer wall of the tube body 21 is in full contact with the refrigerant.

[0024] The connector 6 includes a housing 62 with a cavity 61. The right side of the cavity 61 is connected to the refrigerant nozzle 5, and the left side of the cavity 61 is connected to the refrigerant inlet pipe 7.

[0025] Refrigerant is sprayed out through multiple refrigerant nozzles 5 to rapidly cool down the heat exchange chamber 1.

[0026] The air compressor 9 includes a base 91, on which four compression cylinders 92 are fixed. The inside of each compression cylinder 92 is rotatably connected to a screw 93. The screw 93 has a looser thread on the left and a tighter thread on the right. An intake branch pipe 94 is connected to the upper left side of the compression cylinder 92. The end of the intake branch pipe 94 is connected to the refrigerant outlet pipe 8. A liquid outlet branch pipe 95 is connected to the lower right side of the compression cylinder 92. The end of the liquid outlet branch pipe 95 is connected to the refrigerant inlet pipe 7. A rotary motor 96 is provided on the right side of the base 91 to drive the four screws 93 to rotate.

[0027] The rotating motor 96 drives the screw 93 to rotate, which compresses the refrigerant. The refrigerant vaporizes and absorbs heat, cooling the heat exchange chamber 1, and thus cooling the saturated salt solution that needs to be crystallized.

[0028] Example 2:

[0029] The difference between this embodiment and embodiment 1 is that the base 91 in this embodiment is provided with cooling fans 97 for heat dissipation of the compression cylinder 92 in the front, back and top directions.

[0030] Compared with Example 1, this embodiment uses multiple cooling fans 97 to cool the air compressor 9, thereby improving the heat dissipation efficiency of the air compressor 9.

[0031] The working method of the heat exchange system in Embodiment 2 above includes the following steps:

[0032] S1. Rotating motor 96 drives screw 93 to rotate. Because the screw 93 has a looser thread on the left and a tighter thread on the right, the rotation of screw 93 compresses the gaseous refrigerant entering the left side of compression cylinder 92 into a liquid state. The liquid refrigerant is then introduced into refrigerant inlet pipe 7 through liquid outlet branch pipe 95.

[0033] S2. Liquid refrigerant enters the connector 6 from the refrigerant inlet pipe 7 and is evenly distributed to the refrigerant nozzle 5 in the connector 6. The refrigerant is sprayed out from the refrigerant nozzle 5 and vaporizes and absorbs heat in the heat exchange chamber 1 to cool the tube body 21. This causes the saturated salt solution in the tube body 21 to cool down and crystallize.

[0034] S3 and cooling fan 97 cool the compressor cylinder and rotating motor 96.

[0035] In the above embodiments, the wing rotation motor 96 and the cooling fan 97 are both commercially available products. As long as they can achieve the function of this utility model, they are acceptable. Those skilled in the art can choose to use them based on common sense, and no special limitations are made here.

Claims

1. A heat exchange system for a freeze-re crystallization process, characterized in that, The device includes a heat exchange chamber (1), a heat exchange pipe assembly (2) is fixedly connected inside the heat exchange chamber (1), an inlet pipe (3) is connected to the top of the heat exchange pipe assembly (2), an outlet pipe (4) is connected to the bottom of the heat exchange pipe assembly (2), a plurality of refrigerant nozzles (5) are provided inside the left side of the heat exchange chamber (1), a connector (6) fixed to the outer wall of the heat exchange chamber (1) is provided on the left side of the refrigerant nozzles (5), a refrigerant inlet pipe (7) is connected to the left end of the connector (6), a refrigerant outlet pipe (8) is connected to the right side of the heat exchange chamber (1), an air compressor (9) is connected to the end of the refrigerant outlet pipe (8), and the outlet of the air compressor (9) is connected to the refrigerant inlet pipe (7).

2. A heat exchange system for a freeze-re-crystallization process as claimed in claim 1, wherein, The heat exchange pipe assembly (2) includes a pipe (21) coiled inside the heat exchange chamber (1) and a connecting rod (22) for fixing the pipe (21).

3. A heat exchange system for a freeze-recrystallization process as described in claim 1, characterized in that, The connector (6) includes a housing (62) having a cavity (61), the right side of which is connected to the refrigerant nozzle (5), and the left side of which is connected to the refrigerant inlet pipe (7).

4. A heat exchange system for a freeze-re-crystallization process as claimed in claim 1, wherein, The air compressor (9) includes a base (91), on which four compression cylinders (92) are fixed. A screw (93) is rotatably connected inside the compression cylinder (92). The screw (93) has a looser thread on the left and a tighter thread on the right. An air inlet branch pipe (94) is connected to the upper left side of the compression cylinder (92). The end of the air inlet branch pipe (94) is connected to the refrigerant outlet pipe (8). A liquid outlet branch pipe (95) is connected to the lower right side of the compression cylinder (92). The end of the liquid outlet branch pipe (95) is connected to the refrigerant inlet pipe (7). A rotary motor (96) for driving the four screws (93) to rotate is provided on the right side of the base (91).

5. A heat exchange system for a freeze-re-crystallization process as claimed in claim 4, wherein, The base (91) is equipped with cooling fans (97) in the front, rear and top directions for heat dissipation of the compression cylinder (92).

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