CN215310308U - Direct contact type cooling crystallization tank - Google Patents
Direct contact type cooling crystallization tank Download PDFInfo
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- CN215310308U CN215310308U CN202121719831.6U CN202121719831U CN215310308U CN 215310308 U CN215310308 U CN 215310308U CN 202121719831 U CN202121719831 U CN 202121719831U CN 215310308 U CN215310308 U CN 215310308U
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- crystallization tank
- direct contact
- tank
- central cylinder
- coolant
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Abstract
A direct contact type cooling crystallization tank comprises a crystallization tank, wherein the bottom of the crystallization tank is conical, a stirrer and a central cylinder are arranged in the crystallization tank, the upper end and the lower end of the crystallization tank are communicated through a coolant circulating pipe, and a coolant pump, a precision filter and a heat exchanger are arranged on the coolant circulating pipe. The utility model is used for solving the problems of low efficiency and low utilization rate of the existing cooling crystallization device.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to a direct contact type cooling crystallization tank.
Background
Crystallization is one of the important links in the production process of chemical products, and a cooling crystallizer is one of the most widely applied devices in the chemical production. The prior cooling crystallization usually adopts equipment comprising a natural cooling crystallization device, a jacket cooling crystallizer and a coil cooling crystallizer, and the three equipment are widely applied, but have a plurality of defects: the natural cooling crystallization device has low cooling speed, large occupied area and low production efficiency, and is not suitable for large-scale production; the biggest defects of the jacket cooling crystallizer and the coil cooling crystallizer are that a large amount of cooling water is consumed, the heat exchange surface of the equipment is easy to scale, and the convection of the heat exchange surface is limited, so that the production efficiency is not high, and the equipment can only be cooled to room temperature generally.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a direct contact type cooling crystallization tank, which is used for solving the problems of low efficiency and low utilization rate of the existing cooling crystallization device.
In order to solve the problems, the technical scheme of the utility model is as follows:
a direct contact type cooling crystallization tank comprises a crystallization tank, wherein the bottom of the crystallization tank is conical, a stirrer and a central cylinder are arranged in the crystallization tank, the upper end and the lower end of the crystallization tank are communicated through a coolant circulating pipe, and a coolant pump, a precision filter and a heat exchanger are arranged on the coolant circulating pipe.
The upper part of the crystallization tank is provided with a first thermometer, the middle part of the crystallization tank is provided with a second thermometer, and the bottom of the crystallization tank is provided with a third thermometer.
The rotating shaft of the stirrer is coaxial with the central cylinder, the ratio of the diameter of the central cylinder to the diameter of the crystallization tank is 0.2-0.7: 1, and the ratio of the height of the central cylinder to the distance from the top of the central cylinder to the top of the crystallization tank is 3-1: 1.
The bottom of the conical body of the crystallization tank is provided with a drain valve, the conical surface is provided with a discharge pipeline, and the distance between the opening of the discharge pipeline and the conical bottom is 5-30 cm.
A liquid distributor is arranged below the central cylinder, and the lower end of the coolant circulating pipe is communicated with the liquid distributor.
The stirrer is a low-speed frame stirrer.
The beneficial effects of the utility model are as follows: the coolant directly contacts with the material for heat exchange, so that the heat exchange efficiency is greatly improved, and the energy utilization rate is improved; the material temperature can be reduced to 0 ℃ or even lower by selecting a proper coolant, and the method is more widely applied compared with a circulating water cooling crystallization tank; the inner wall of the crystallization tank does not play a role in heat exchange any more, so that the scaling of the inner wall is avoided, the risk of pipeline blockage is reduced, and the cleaning period of the crystallization tank is greatly reduced; the mixing is realized by the convection formed by different specific gravities of the materials and the coolant, the condition that the traditional crystal tank stirring paddle is used for smashing crystals is avoided, and the obtained crystals are full and uniform.
Drawings
The utility model is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the device comprises a feeding pipe, 2, a first thermometer, 3, a crystallization tank, 4, a second thermometer, 5, a central cylinder, 6, a third thermometer, 7, a discharging pipe, 8, a drain pipe, 9, a liquid distributor, 10, a heat exchanger, 11, a precision filter, 12, a coolant pump, 13 and a stirrer.
Detailed Description
As shown in figure 1, the direct contact type cooling crystallization tank comprises a crystallization tank 3, wherein the bottom of the crystallization tank 3 is conical, a stirrer 13 and a central cylinder 5 are arranged in the crystallization tank 3, the upper end and the lower end of the crystallization tank 3 are communicated through a coolant circulating pipe, and a coolant pump 12, a precision filter 11 and a heat exchanger 10 are arranged on the coolant circulating pipe. The first thermometer 2 is installed at the upper part of the crystallization tank 3, the second thermometer 4 is installed at the middle part of the crystallization tank, and the third thermometer 6 is installed at the bottom part of the crystallization tank. The rotating shaft of the stirrer 13 is coaxial with the central cylinder 5, the ratio of the diameter of the central cylinder 5 to the diameter of the crystallization tank 3 is 0.2-0.7: 1, and the ratio of the height of the central cylinder 5 to the distance from the top of the central cylinder 5 to the top of the crystallization tank 3 is 3-1: 1. The bottom of the cone of the crystallization tank 3 is provided with a drain valve, the conical surface is provided with 7 discharging pipes, and the distance between the opening of the 7 discharging pipes and the bottom of the cone is 5-30 cm. A liquid distributor 9 is arranged below the central cylinder 5, and the lower end of the coolant circulating pipe is communicated with the liquid distributor 9. The stirrer 13 is a low-speed frame stirrer 13.
The coolant is sprayed to the bottom of the crystallization tank 3 after heat exchange and cooling by the heat exchanger 10, the coolant is dispersed into fine liquid drops under the action of the liquid distributor 9, the coolant moves from bottom to top under the action of gravity and is in convective contact with the materials to generate heat exchange because the coolant is incompatible with the materials and has a specific gravity lower than that of water, and the solution reaches a supersaturated state to precipitate crystals. The coolant floats to the top of the crystallization tank 3 after passing through the central cylinder 5, and is gathered together to form a continuous homogeneous phase. The material with the crystals moves downwards through the space between the crystallization tank 3 and the central cylinder 5, the large crystals sink to the bottom of the crystallization tank 3, and the liquid phase with the small crystals moves upwards along with the sprayed coolant and exchanges heat with the newly entered material again. The coolant at the top of the crystallization tank 3 is conveyed to a precision filter 11 through a coolant pump 12, fine crystals carried in the coolant are separated out, the obtained pure coolant enters a heat exchanger 10 for cooling, and then enters the crystallization tank 3, and the process is repeated.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.
Claims (6)
1. The utility model provides a direct contact cooling crystallizer tank, includes crystallizer tank (3), and crystallizer tank (3) bottom is the toper, its characterized in that: a stirrer (13) and a central cylinder (5) are arranged in the crystallization tank (3), the upper end and the lower end of the crystallization tank (3) are communicated through a coolant circulating pipe, and a coolant pump (12), a precision filter (11) and a heat exchanger (10) are arranged on the coolant circulating pipe.
2. A direct contact cooling crystallization tank as claimed in claim 1, wherein: a first thermometer (2) is arranged at the upper part of the crystallization tank (3), a second thermometer (4) is arranged at the middle part of the crystallization tank, and a third thermometer (6) is arranged at the bottom of the crystallization tank.
3. A direct contact cooling crystallization tank as claimed in claim 1, wherein: the rotating shaft of the stirrer (13) is coaxial with the central cylinder (5), the ratio of the diameter of the central cylinder (5) to the diameter of the crystallization tank (3) is 0.2-0.7: 1, and the ratio of the height of the central cylinder (5) to the distance from the top of the central cylinder (5) to the top of the crystallization tank (3) is 3-1: 1.
4. A direct contact cooling crystallization tank as claimed in claim 1, wherein: the bottom of the cone of the crystallization tank (3) is provided with a drain valve, a discharge pipe (7) is arranged on the conical surface, and the distance between the opening of the discharge pipe (7) and the bottom of the cone is 5-30 cm.
5. A direct contact cooling crystallization tank as claimed in claim 1, wherein: a liquid distributor (9) is arranged below the central cylinder (5), and the lower end of the coolant circulating pipe is communicated with the liquid distributor (9).
6. A direct contact cooling crystallization tank as claimed in claim 1, wherein: the stirrer (13) is a low-speed frame stirrer (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121719831.6U CN215310308U (en) | 2021-07-27 | 2021-07-27 | Direct contact type cooling crystallization tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121719831.6U CN215310308U (en) | 2021-07-27 | 2021-07-27 | Direct contact type cooling crystallization tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215310308U true CN215310308U (en) | 2021-12-28 |
Family
ID=79572904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121719831.6U Active CN215310308U (en) | 2021-07-27 | 2021-07-27 | Direct contact type cooling crystallization tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215310308U (en) |
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2021
- 2021-07-27 CN CN202121719831.6U patent/CN215310308U/en active Active
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