CN215691803U - Crystallization mother liquor strengthening crystallization device - Google Patents
Crystallization mother liquor strengthening crystallization device Download PDFInfo
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- CN215691803U CN215691803U CN202121848356.2U CN202121848356U CN215691803U CN 215691803 U CN215691803 U CN 215691803U CN 202121848356 U CN202121848356 U CN 202121848356U CN 215691803 U CN215691803 U CN 215691803U
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Abstract
The utility model discloses a crystallization mother liquor reinforced crystallization device, which comprises an ice water machine (1) with a circulating pump, an ice water circulating pipeline (2), a reaction kettle cooling jacket (3), a reaction kettle (4) and a stirring device (5); the reaction kettle cooling jacket (3) is arranged on the inner wall of the reaction kettle (3), the upper part of the reaction kettle cooling jacket is provided with a cold fluid inlet, and the lower part of the reaction kettle cooling jacket is provided with a cold fluid outlet; an inlet of a circulating pump of the water chiller (1) is connected with a cold fluid outlet of the cooling jacket of the reaction kettle through an ice water circulating pipeline (2), and an outlet of the circulating pump is connected with the cold fluid inlet of the cooling jacket of the reaction kettle through the ice water circulating pipeline (2); and a stirring device (5) driven by a motor is arranged in the reaction kettle (4). The utility model has simple structure, high mother solution solute crystallization rate and purity, simple and efficient operation and solves the problem that the solute is difficult to separate out from the mother solution crystallized by the traditional natural cooling method in the prior art.
Description
Technical Field
The utility model relates to the technical field of crystallization devices of MVR evaporation systems, in particular to a crystallization mother liquor reinforced crystallization device.
Background
The crystallization method is an operation method in which components in a mixture are separated by crystallization, utilizing the difference in solubility between the components in the same solvent or the difference in solubility between the components in a cold state and a hot state. The crystallization method comprises cooling crystallization, evaporative crystallization, recrystallization and sublimation crystallization. Compared with other three crystallization methods, the cooling crystallization method has the advantages of lowest energy consumption, easy realization of the process and suitability for using unsaturated solution with solute having solubility reduced along with temperature reduction. When the temperature is reduced and the crystallization is carried out, the solution is heated firstly, the solvent is evaporated to form a saturated solution, the temperature of the hot saturated solution is reduced at the moment, and the solute with the solubility greatly changing along with the temperature is separated out in the form of crystals.
In the MVR evaporation system process, the temperature of the crystallization mother liquor is between 80 and 90 ℃, and if a natural cooling method is adopted, the solute in the crystallization mother liquor is difficult to separate out. In order to separate out solute in the mother liquor and reduce the secondary evaporation pressure of the mother liquor entering the MVR evaporation system, it is necessary to develop a crystallization mother liquor reinforced crystallization device applicable to small and medium-sized enterprises.
Disclosure of Invention
The utility model aims to provide a crystallization mother liquor strengthened crystallization device which is simple in structure, high in mother liquor solute crystallization rate and purity, simple and efficient to operate and solves the problem that solute is difficult to precipitate from crystallization mother liquor by a traditional natural cooling method in the prior art.
In order to realize the aim, the crystallization mother liquor reinforced crystallization device comprises an ice water machine 1 with a circulating pump, an ice water circulating pipeline 2, a reaction kettle cooling jacket 3, a reaction kettle 4 and a stirring device 5; the reaction kettle cooling jacket 3 is arranged on the inner wall of the reaction kettle 4, the upper part of the reaction kettle cooling jacket is provided with a cold fluid inlet, and the lower part of the reaction kettle cooling jacket is provided with a cold fluid outlet; an inlet of a circulating pump of the water chiller 1 is connected with a cold fluid outlet of the cooling jacket of the reaction kettle through an ice water circulating pipeline 2, and an outlet of the circulating pump is connected with the cold fluid inlet of the cooling jacket of the reaction kettle through the ice water circulating pipeline 2; and a stirring device 5 driven by a motor is arranged in the reaction kettle 4.
When the device works, the mother liquor and the cold fluid in the jacket are subjected to heat exchange through stirring in the crystallization reaction kettle, heat is transferred to the cold fluid, the cold fluid flows back to the water chiller after the temperature of the cold fluid rises, the cold fluid is cooled by the water chiller and then is pumped into the jacket of the crystallization reaction kettle by the circulating pump in the water chiller, and the liquid in the crystallization reaction kettle is cooled through the circulating heat exchange, so that the solute is separated out.
The crystallization mother liquor reinforced crystallization device has the following technical characteristics and beneficial effects:
1. the method can be successfully applied to secondary crystallization of the mother liquor of the MVR wastewater evaporation system, and compared with the original natural cooling crystallization, the solute crystallization rate of the mother liquor is improved by more than 50%, so that the load of a subsequent evaporation crystallization system is reduced;
2. the crystallization mother liquor can be subjected to circulating heat exchange and repeated crystallization, the purity of a solute can be improved, and the method can be applied to the field of crystallization and purification in the chemical industry;
3. simple structure, low manufacturing and maintenance cost, convenient operation, high efficiency and strong adaptability.
Drawings
FIG. 1 is a schematic front view of a crystallization mother liquor enhanced crystallization apparatus according to the present invention.
Reference numerals: the system comprises a water chiller 1, an ice water circulating pipeline 2, a reaction kettle cooling jacket 3, a reaction kettle 4, a stirring device 5 and a crystallization mother liquor 6.
Detailed Description
The crystallization mother liquor strengthening crystallization device of the present invention will be described in further detail with reference to the following specific examples.
As shown in fig. 1, the crystallization mother liquor reinforced crystallization device of the present invention comprises an ice water machine 1 with a circulating pump, an ice water circulating pipeline 2, a reaction kettle cooling jacket 3, a reaction kettle 4 and a stirring device 5; the reaction kettle cooling jacket 3 is arranged on the inner wall of the reaction kettle 4, the upper part of the reaction kettle cooling jacket is provided with a cold fluid inlet, and the lower part of the reaction kettle cooling jacket is provided with a cold fluid outlet; an inlet of a circulating pump of the water chiller 1 is connected with a cold fluid outlet of the cooling jacket of the reaction kettle through an ice water circulating pipeline 2, and an outlet of the circulating pump is connected with the cold fluid inlet of the cooling jacket of the reaction kettle through the ice water circulating pipeline 2; and a stirring device 5 driven by a motor is arranged in the reaction kettle 4.
When the device works, the crystallization mother liquor 6 is added into the reaction kettle 4, the liquid level is enabled to be about 2/3, and the stirring device 5 is started to stir; and then starting the water chiller 1, adjusting the crystallization temperature according to the crystallization process requirement, and allowing ice water to enter the reaction kettle cooling jacket 3 through the ice water circulating pipeline 2 to perform circulating cooling heat exchange with the liquid in the reaction kettle 4, so that the temperature of the mother liquor is reduced to the crystallization process temperature, and then the solute is separated out.
The method can be successfully applied to secondary crystallization of the mother liquor of the MVR wastewater evaporation system, and compared with the original natural cooling crystallization, the solute crystallization rate of the mother liquor is improved by more than 50%, so that the load of a subsequent evaporation crystallization system is reduced; the crystallization mother liquor can be subjected to circulating heat exchange and repeated crystallization, the solute purity can be improved, and the method can be applied to the field of crystallization and purification in the chemical industry.
Claims (1)
1. A crystallization mother liquor strengthening crystallization device is characterized in that: the device comprises an ice water machine (1) with a circulating pump, an ice water circulating pipeline (2), a reaction kettle cooling jacket (3), a reaction kettle (4) and a stirring device (5); the reaction kettle cooling jacket (3) is arranged on the inner wall of the reaction kettle (4), the upper part of the reaction kettle cooling jacket is provided with a cold fluid inlet, and the lower part of the reaction kettle cooling jacket is provided with a cold fluid outlet; an inlet of a circulating pump of the water chiller (1) is connected with a cold fluid outlet of the cooling jacket of the reaction kettle through an ice water circulating pipeline (2), and an outlet of the circulating pump is connected with the cold fluid inlet of the cooling jacket of the reaction kettle through the ice water circulating pipeline (2); and a stirring device (5) driven by a motor is arranged in the reaction kettle (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121848356.2U CN215691803U (en) | 2021-08-09 | 2021-08-09 | Crystallization mother liquor strengthening crystallization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121848356.2U CN215691803U (en) | 2021-08-09 | 2021-08-09 | Crystallization mother liquor strengthening crystallization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215691803U true CN215691803U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121848356.2U Active CN215691803U (en) | 2021-08-09 | 2021-08-09 | Crystallization mother liquor strengthening crystallization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215691803U (en) |
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2021
- 2021-08-09 CN CN202121848356.2U patent/CN215691803U/en active Active
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