CN108682271B - Practical training teaching device for multi-effect evaporation and crystallization production - Google Patents
Practical training teaching device for multi-effect evaporation and crystallization production Download PDFInfo
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- CN108682271B CN108682271B CN201810429579.1A CN201810429579A CN108682271B CN 108682271 B CN108682271 B CN 108682271B CN 201810429579 A CN201810429579 A CN 201810429579A CN 108682271 B CN108682271 B CN 108682271B
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- 238000002425 crystallisation Methods 0.000 title claims abstract description 76
- 230000008025 crystallization Effects 0.000 title claims abstract description 76
- 238000001704 evaporation Methods 0.000 title claims abstract description 62
- 230000008020 evaporation Effects 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 238000012549 training Methods 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000012452 mother liquor Substances 0.000 claims abstract description 11
- 238000009833 condensation Methods 0.000 claims abstract description 7
- 230000005494 condensation Effects 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000002826 coolant Substances 0.000 claims description 17
- 238000005057 refrigeration Methods 0.000 claims description 10
- 239000011552 falling film Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 238000012824 chemical production Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical class [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000010977 unit operation Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000010724 circulating oil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0018—Evaporation of components of the mixture to be separated
- B01D9/0031—Evaporation of components of the mixture to be separated by heating
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention provides a practical training teaching device for multi-effect evaporation and crystallization production, which comprises a one-effect evaporation section, a two-effect evaporation section and a crystallization section; the first-effect evaporation section comprises a first-effect evaporator, a first-effect concentrated liquid tank, a first-effect gas-liquid separator, a first-effect condenser and a first-effect condensed water tank; the second-effect evaporation section comprises a second-effect evaporator, a second-effect concentrated liquid tank, a second-effect gas-liquid separator, a second-effect condenser and a second-effect condensation water tank; the upper feed inlet of the two-effect evaporator is communicated with the discharge outlet of the one-effect concentrated liquid tank; the crystallization section comprises a crystallization tank, a centrifuge and a mother liquor tank, wherein a feed inlet of the crystallization tank is communicated with a discharge outlet of the two-effect concentrated liquid tank. The practical training teaching device for the multi-effect evaporation and crystallization production can fully show the multi-effect evaporation and crystallization process in chemical production, and can be applied to the practical training teaching activities of the multi-effect evaporation and crystallization, so that students and beginners fully understand the multi-effect evaporation and crystallization process.
Description
Technical Field
The invention relates to a production training teaching device, in particular to a multi-effect evaporation and crystallization production training teaching device.
Background
Evaporation and crystallization are important chemical unit operations, and are widely applied to processes such as smelting in chemical industry and metal mining industry, pickling waste liquid in large-scale steel plants, wet desulfurization waste liquid treatment in power plants and the like. In the actual chemical production process, multiple effect evaporation and crystallization operations are most common. Therefore, most students in chemical industry profession or staff engaged in chemical industry production need to fully understand the operation process of evaporation and crystallization. However, no practical teaching device for chemical production is available in the market at present for multi-effect evaporation and crystallization processes. Therefore, the development of the practical training teaching device for the multi-effect evaporation and crystallization production has important practical significance in practical training teaching of professional institutions, higher institutions and chemical enterprises.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, thereby providing a practical training teaching device for multi-effect evaporation and crystallization production.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a practical training teaching device for multi-effect evaporation and crystallization production comprises a first-effect evaporation section, a second-effect evaporation section and a crystallization section;
the first-effect evaporation section comprises a first-effect evaporator, a first-effect concentrated liquid tank, a first-effect gas-liquid separator, a first-effect condenser and a first-effect condensed water tank; the lower discharge port of the first-effect evaporator is communicated with the feed port of the first-effect concentrated liquid tank, the upper steam outlet of the first-effect evaporator is communicated with the inlet of the first-effect gas-liquid separator, the gas outlet of the first-effect gas-liquid separator is communicated with the inlet of the first-effect condenser, and the liquid outlet of the first-effect condenser is communicated with the feed port of the first-effect condensed water tank;
the second-effect evaporation section comprises a second-effect evaporator, a second-effect concentrated liquid tank, a second-effect gas-liquid separator, a second-effect condenser and a second-effect condensation water tank; the upper feed inlet of the second-effect evaporator is communicated with the discharge outlet of the first-effect concentrated liquid tank, the lower discharge outlet of the second-effect evaporator is communicated with the feed inlet of the second-effect concentrated liquid tank, the upper steam outlet of the second-effect evaporator is communicated with the inlet of the second-effect gas-liquid separator, the gas outlet of the second-effect gas-liquid separator is communicated with the inlet of the second-effect condenser, and the liquid outlet of the second-effect condenser is communicated with the liquid inlet of the second-effect condensed water tank;
the crystallization section comprises a crystallization tank, a centrifugal machine and a mother liquor tank, wherein a feed inlet of the crystallization tank is communicated with a discharge outlet of the two-effect concentrated liquid tank, a discharge outlet of the crystallization tank is communicated with a liquid inlet of the centrifugal machine, and a liquid outlet of the centrifugal machine is communicated with a liquid inlet of the mother liquor tank.
Based on the real teaching device of instructing of above-mentioned multiple effect evaporation and crystallization production, it still includes vacuum system, vacuum system includes vacuum buffer tank and vacuum pump, the extraction opening of vacuum pump is connected the gas outlet of vacuum buffer tank, the air inlet of vacuum buffer tank communicates respectively first effect condensate water tank second effect condensate water tank crystallization tank with the gas vent of mother liquor jar.
Based on the practical training teaching device for the multi-effect evaporation and crystallization production, the practical training teaching device further comprises a preheating section, wherein the preheating section comprises a raw material tank and a raw material preheater, a discharge hole of the raw material tank is communicated with a feed inlet of the raw material preheater, and a discharge hole of the raw material preheater is communicated with an upper feed inlet of the one-effect evaporator.
Based on the above, the preheating section further comprises a hot water thermostatic bath for providing heating medium to the raw material tank and the raw material preheater.
Based on the above, the outer wall of the raw material tank is provided with a heating jacket, the heating jacket is provided with a heating medium inlet and a heating medium outlet, the heating medium inlet is communicated with the water outlet of the hot water constant temperature tank, and the heating medium outlet is communicated with the water inlet of the hot water constant temperature tank.
Based on the practical training teaching device for the multi-effect evaporation and crystallization production, the device also comprises a hot oil thermostatic bath for providing heating medium for the first-effect evaporator and the second-effect evaporator, and a refrigeration thermostatic bath for providing cooling medium for the first-effect condenser, the second-effect condenser and the crystallization tank.
Based on the above, the outer wall of the crystallization tank is provided with a refrigeration jacket, the refrigeration jacket is provided with a cooling medium inlet and a cooling medium outlet, the cooling medium inlet is communicated with the water outlet of the refrigeration constant temperature tank, and the cooling medium outlet is communicated with the water inlet of the refrigeration constant temperature tank.
Based on the above, the first-effect condenser and the second-effect condenser are tube type heat exchangers.
Based on the above, the first-effect evaporator and the second-effect evaporator are scraper falling film evaporators.
Based on the above, the raw material tank and the crystallization tank are internally provided with stirring paddles.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and particularly has the following advantages:
when the practical training teaching device for multi-effect evaporation and crystallization production provided by the invention is used, the concentrated solution of one-effect evaporation is used as the raw material solution of two-effect evaporation, the heating medium of the one-effect evaporator and the two-effect evaporator is a public circulating oil pump, so that the reduction of the production strength of the evaporator caused by the large heat transfer temperature difference loss between the two effects due to the adoption of the traditional heating mode of one-effect steam cyclic utilization as a two-effect heat source is avoided, the expected thickening degree can be achieved, and the experimental effect of multi-effect evaporation can be obviously observed by experimental staff; meanwhile, the operation process of the device comprises various chemical unit operations such as fluid transportation, evaporation, cooling crystallization, centrifugal separation, heat transfer and the like, and an experimenter can fully understand various different chemical unit operations through the multi-effect evaporation and crystallization production training teaching device; the device adopts a mode of combining gravity conveying and vacuum material guiding in terms of fluid conveying, and the heat transfer process is embodied by tube-array heat exchange and jacket heat exchange, so that diversified teaching can be realized, the device is closer to a production condition, and operators can fully understand various operation processes in chemical production; meanwhile, the multi-effect evaporation and crystallization production practical training device comprises a raw material tank, a jacket heat exchange crystallization tank, a tube array heat exchanger, a scraper falling film evaporator, a centrifugal machine, a vacuum pump, a constant temperature tank and the like, is suitable for beginners and students to be familiar with the operation of various chemical equipment and devices, and further relates to continuous operation and intermittent operation among various chemical operation units, so that experimenters can further understand the distinction and commonality of the continuous operation and the intermittent operation, and further understand the operation of various chemical units; in addition, the cooling medium and the heating medium used by the multi-effect evaporation and crystallization production training teaching device can be recycled, and the requirements of modern green energy conservation are met.
Drawings
FIG. 1 is a schematic flow chart of a practical training teaching device for multi-effect evaporation and crystallization production in the invention.
FIG. 2 is a schematic flow diagram of the preheating section and the vacuum system of the present invention.
In the figure: 1. a vacuum buffer tank; 2. a vacuum pump; 3. a raw material tank; 4. a raw material preheater; 5. a hot water thermostatic bath; 6. a first effect evaporator; 7. a first-effect concentrate tank; 8. an effective gas-liquid separator; 9. a first effect condenser; 10. a first-effect condensate water tank; 11. a two-effect evaporator; 12. a two-effect concentrate tank; 13. a two-effect gas-liquid separator; 14. a double-effect condenser; 15. a two-effect condensed water tank; 16. a hot oil thermostatic bath; 17. a crystallization tank; 18. a centrifuge; 19. a mother liquor tank; 20. a refrigerating thermostatic bath; 21. and an exhaust port.
Detailed Description
The technical scheme of the invention is further described in detail through the following specific embodiments.
Example 1
As shown in figure 1, the practical training teaching device for multi-effect evaporation and crystallization production comprises a one-effect evaporation section, a two-effect evaporation section and a crystallization section; the first-effect evaporation working section comprises a first-effect evaporator 6, a first-effect concentrated liquid tank 7, a first-effect gas-liquid separator 8, a first-effect condenser 9 and a first-effect condensed water tank 10, wherein the upper feed inlet of the first-effect evaporator 6 is communicated with raw materials, the lower discharge outlet of the first-effect evaporator 6 is communicated with the feed inlet of the first-effect concentrated liquid tank 7, the upper steam outlet of the first-effect evaporator 6 is communicated with the inlet of the first-effect gas-liquid separator 8, the gas outlet of the first-effect gas-liquid separator 8 is communicated with the inlet of the first-effect condenser 9, and the liquid outlet of the first-effect condenser 9 is communicated with the feed inlet of the first-effect condensed water tank 10;
the second-effect evaporation working section comprises a second-effect evaporator 11, a second-effect concentrated liquid tank 12, a second-effect gas-liquid separator 13, a second-effect condenser 14 and a second-effect condensed water tank 15, wherein an upper feed inlet of the second-effect evaporator 11 is communicated with a discharge outlet of the first-effect concentrated liquid tank 7, a lower discharge outlet of the second-effect evaporator 11 is communicated with the second-effect concentrated liquid tank 12, a steam outlet of the second-effect evaporator 11 is communicated with an inlet of the second-effect gas-liquid separator 13, a gas outlet of the second-effect gas-liquid separator 13 is communicated with an inlet of the second-effect condenser 14, and a liquid outlet of the second-effect condenser 14 is communicated with a liquid inlet of the second-effect condensed water tank 15.
The crystallization section comprises a crystallization tank 17, a centrifugal machine 18 and a mother liquor tank 19, wherein a feed inlet of the crystallization tank 17 is communicated with a discharge outlet of the two-effect concentration liquid tank 12, the discharge outlet of the crystallization tank 17 is connected with the centrifugal machine 18, and a liquid outlet of the centrifugal machine 18 is connected with the mother liquor tank 19.
Further, the training teaching device for multi-effect evaporation and crystallization production further comprises a hot oil thermostatic bath 16 for providing heating medium for the first-effect evaporator 6 and the second-effect evaporator 11, and a refrigerating thermostatic bath 20 for providing cooling medium for the first-effect condenser 9, the second-effect condenser 14 and the crystallization tank 17.
Further, a cooling jacket is arranged on the outer wall of the crystallization tank 17, a stirring paddle is arranged in the crystallization tank 17, a cooling medium inlet and a cooling medium outlet are arranged on the cooling jacket, the cooling medium inlet is communicated with the 20 water outlet of the cooling constant temperature tank, and the cooling medium outlet is communicated with the water inlet of the cooling constant temperature tank 20, so that the cooling medium can be recycled.
Specifically, the first-effect condenser 9 and the second-effect condenser 14 are tube type heat exchangers, and the first-effect evaporator 6 and the second-effect evaporator 11 are scraper falling film evaporators.
When the device is used, saturated sodium sulfate solution is prepared firstly, a hot oil thermostatic bath 16 and a refrigerating thermostatic bath 20 are opened, raw material sodium sulfate solution enters a first-effect evaporator 6 to perform first-effect evaporation operation, after the first-effect evaporation operation is finished, materials in a first-effect concentrated liquid tank 7 enter a material pipe of a pipe gallery #2 to prepare for second-effect evaporation operation entering a second-effect evaporator 11 of a second-effect evaporation section, materials in a second-effect concentrated liquid tank 12 enter a material pipe of a pipe gallery #3 to prepare for crystallization operation entering a crystallization tank 17 of a crystallization section, after the crystallization operation is finished, materials in the crystallization tank 17 are placed into a centrifugal machine 18 to perform solid-liquid centrifugal separation operation, mother liquid after centrifugation enters a mother liquid tank 19, and sodium sulfate crystals are recycled. Other solutions can be prepared as needed during use.
Example 2
In this embodiment, the difference from embodiment 1 described above is that: as shown in fig. 1 and 2, the practical training teaching device for multi-effect evaporation and crystallization production further comprises a preheating section and a vacuum system, wherein the preheating section comprises a raw material tank 3, a raw material preheater 4 and a hot water constant temperature tank 5 for providing heating media for the raw material tank 3 and the raw material preheater 4 through a pipe gallery, a discharge port of the raw material tank 3 is communicated with the raw material preheater 4, and a discharge port of the raw material preheater 4 is communicated with an upper feed port of the first-effect evaporator 11; the vacuum system comprises a vacuum buffer tank 1 and a vacuum pump 2, wherein an extraction opening of the vacuum pump 2 is connected with an air outlet of the vacuum buffer tank 1, and an air inlet of the vacuum buffer tank 1 is respectively communicated with an air outlet 21 of the first-effect condensation water tank 10, the second-effect condensation water tank 10, the crystallization tank 17 and the mother liquor tank 19 to form a negative pressure environment; the outer wall of the raw material tank 3 is provided with a heating jacket, the heating jacket is provided with a heating medium inlet and a heating medium outlet, the heating medium inlet is communicated with the water outlet of the hot water constant temperature tank 5, the heating medium outlet is communicated with the water inlet of the hot water constant temperature tank 5, and liquid is subjected to double preheating through the raw material tank 3 and the raw material preheater 4, so that the preheating efficiency is improved.
When the evaporator is used, the vacuum pump 2 and the heating constant temperature tank 5 are started, solid sodium sulfate particles are dissolved in the raw material tank 3 added with tap water to obtain saturated sodium sulfate solution, and the saturated sodium sulfate solution is preheated by the raw material preheater 4 and then enters the material pipe of the pipe gallery #1 to prepare for entering the one-effect evaporation section.
Furthermore, the practical training teaching device for multi-effect evaporation and crystallization production can be provided with various valves according to the requirement of controlling fluid flow, and is specifically shown in fig. 1 and fig. 2, which are conventional technical means in the art and are not described herein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (10)
1. Practical training teaching device for multi-effect evaporation and crystallization production, which is characterized in that: the device comprises a first-effect evaporation section, a second-effect evaporation section and a crystallization section;
the first-effect evaporation section comprises a first-effect evaporator, a first-effect concentrated liquid tank, a first-effect gas-liquid separator, a first-effect condenser and a first-effect condensed water tank; the lower discharge port of the first-effect evaporator is communicated with the feed port of the first-effect concentrated liquid tank, the upper steam outlet of the first-effect evaporator is communicated with the inlet of the first-effect gas-liquid separator, the gas outlet of the first-effect gas-liquid separator is communicated with the inlet of the first-effect condenser, and the liquid outlet of the first-effect condenser is communicated with the feed port of the first-effect condensed water tank;
the second-effect evaporation section comprises a second-effect evaporator, a second-effect concentrated liquid tank, a second-effect gas-liquid separator, a second-effect condenser and a second-effect condensation water tank; the upper feed inlet of the second-effect evaporator is communicated with the discharge outlet of the first-effect concentrated liquid tank, the lower discharge outlet of the second-effect evaporator is communicated with the feed inlet of the second-effect concentrated liquid tank, the upper steam outlet of the second-effect evaporator is communicated with the inlet of the second-effect gas-liquid separator, the gas outlet of the second-effect gas-liquid separator is communicated with the inlet of the second-effect condenser, and the liquid outlet of the second-effect condenser is communicated with the liquid inlet of the second-effect condensed water tank;
the crystallization section comprises a crystallization tank, a centrifugal machine and a mother liquor tank, wherein a feed inlet of the crystallization tank is communicated with a discharge outlet of the two-effect concentrated liquid tank, a discharge outlet of the crystallization tank is communicated with a liquid inlet of the centrifugal machine, and a liquid outlet of the centrifugal machine is communicated with a liquid inlet of the mother liquor tank.
2. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 1, wherein: the vacuum system comprises a vacuum buffer tank and a vacuum pump, wherein an extraction opening of the vacuum pump is connected with an air outlet of the vacuum buffer tank, and an air inlet of the vacuum buffer tank is respectively communicated with an air outlet of the first-effect condensation water tank, the second-effect condensation water tank, the crystallization tank and the mother liquor tank.
3. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 1 or 2, wherein: the preheating section comprises a raw material tank and a raw material preheater, wherein a discharge hole of the raw material tank is communicated with a feed inlet of the raw material preheater, and a discharge hole of the raw material preheater is communicated with an upper feed inlet of the first-effect evaporator.
4. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 3, wherein: the preheating section also includes a hot water thermostat that provides a heating medium to the feed tank and the feed preheater.
5. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 4, wherein: the outer wall of the raw material tank is provided with a heating jacket, the heating jacket is provided with a heating medium inlet and a heating medium outlet, the heating medium inlet is communicated with the water outlet of the hot water constant temperature tank, and the heating medium outlet is communicated with the water inlet of the hot water constant temperature tank.
6. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 1, wherein: the device also comprises a hot oil thermostatic bath for providing heating medium for the first-effect evaporator and the second-effect evaporator, and a refrigeration thermostatic bath for providing cooling medium for the first-effect condenser, the second-effect condenser and the crystallization tank.
7. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 6, wherein: the outer wall of the crystallization tank is provided with a refrigeration jacket, the refrigeration jacket is provided with a cooling medium inlet and a cooling medium outlet, the cooling medium inlet is communicated with the water outlet of the refrigeration constant temperature tank, and the cooling medium outlet is communicated with the water inlet of the refrigeration constant temperature tank.
8. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 1, wherein: the first-effect condenser and the second-effect condenser are tubular heat exchangers.
9. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 1, wherein: the first-effect evaporator and the second-effect evaporator are scraper falling film evaporators.
10. The practical training teaching device for multi-effect evaporation and crystallization production according to claim 3, wherein: the raw material tank and the crystallization tank are internally provided with stirring paddles.
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| BR8901953A (en) * | 1988-10-12 | 1990-08-21 | Metallgesellschaft Ag | PROCESS FOR THE CONCENTRATION OF SOLUTIONS AND INSTALLATION OF EVAPORATION OF MULTIPLE STAGES |
| CN2676327Y (en) * | 2003-11-20 | 2005-02-02 | 中南大学 | External heating natural circulation type evaporation experimental apparatus |
| CN101306260A (en) * | 2007-07-12 | 2008-11-19 | 项公浩 | Multifunctional multiple-effect automatic continuous evaporative crystallization technique and crystallization device |
| CN101707025A (en) * | 2009-12-11 | 2010-05-12 | 南京化工职业技术学院 | Actual training device for producing cyclohexane by hydrogenation of benzene for teaching |
| CN202795890U (en) * | 2012-09-26 | 2013-03-13 | 周恩洪 | Teaching test system for process control of evaporation and concentration equipment |
| CN203085061U (en) * | 2013-01-10 | 2013-07-24 | 常州工程职业技术学院 | Integrated practical training device for pharmacy |
| CN103508877A (en) * | 2013-10-15 | 2014-01-15 | 济南华明生化有限公司 | Energy-saving method and device for four-effect concentration and crystallization of itaconic acid |
| CN204017401U (en) * | 2014-07-08 | 2014-12-17 | 四川理工学院 | A kind of ultrasonic extraction and ultrasonic evaporation and concentration integration apparatus |
| CN204151177U (en) * | 2014-09-16 | 2015-02-11 | 青岛国标环保有限公司 | Phenol-acetone waste water evaporative desalination pretreatment unit |
| CN204485354U (en) * | 2015-02-13 | 2015-07-22 | 河北诺达化工设备有限公司 | A kind of evaporated crystallization device to ammonium chloride when producing potassium nitrate |
| CN104732862A (en) * | 2015-03-12 | 2015-06-24 | 来宾职业教育中心学校 | Teaching and practical training device for sugaring manufacturing technology |
| CN104986815A (en) * | 2015-07-07 | 2015-10-21 | 上海理工大学 | Universal type evaporation and concentration system experiment device based on heat pump and rising film evaporation principle |
| CN105854325A (en) * | 2016-05-27 | 2016-08-17 | 苏州乔发环保科技股份有限公司 | Triple-effect central cyclic evaporating system and evaporating technology thereof |
| CN106512457A (en) * | 2016-11-26 | 2017-03-22 | 无锡荣丰生物工程有限公司 | Four-effect concentration-crystallization-coupled system for threonine and operation process thereof |
| CN106621418A (en) * | 2016-11-27 | 2017-05-10 | 侴乔力 | Condensed steam source heat pump driving multiple-effect distillation solution crystallization purification process |
| CN107862974A (en) * | 2017-11-22 | 2018-03-30 | 河南莱帕克化工设备制造有限公司 | Benzamide production line instructional device |
| CN107955086A (en) * | 2017-11-22 | 2018-04-24 | 河南莱帕克化工设备制造有限公司 | Agarose produces line training device |
| CN208922625U (en) * | 2018-05-08 | 2019-05-31 | 河南莱帕克化工设备制造有限公司 | Multiple-effect evaporation and crystallization production practice instructional device |
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