CN105758162A - Water vapor vacuum rapid drying system and working method - Google Patents
Water vapor vacuum rapid drying system and working method Download PDFInfo
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- CN105758162A CN105758162A CN201610126610.5A CN201610126610A CN105758162A CN 105758162 A CN105758162 A CN 105758162A CN 201610126610 A CN201610126610 A CN 201610126610A CN 105758162 A CN105758162 A CN 105758162A
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- heat exchanger
- steam
- outlet
- hot side
- gas
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/005—Drying-steam generating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a water vapor vacuum rapid drying system and a working method and belongs to the field of energy sources, power and the like. The water vapor vacuum rapid drying system is characterized in that compared with an air drying medium under the same pressure condition, the system takes water vapor (7) with a relatively strong moisture adsorption capability as a drying medium; compared with a normal-pressure operation condition, the concentration difference of moisture inside and outside a material to be dried (9) is increased through vacuum operation in a dryer (1), so that the dehumidifying speed of the material to be dried (9) is easily improved; and furthermore, the system only needs to consume mechanical energy of a compressor (2) and then can be operated, and one part of energy is recycled by adopting an expansion machine (5), so that the whole energy consumption of the system is relatively low and no pollution is caused.
Description
Technical field
The present invention relates to a kind of steam vacuum Quick drying system and method for work, belong to the energy and dynamic field.
Background technology
Conventional drying is the process of high energy consumption.According to statistics, the energy of whole world 10%-25%, for industry heat-force dry, dries the energy used in China and accounts for about the 12% of national economy total energy consumption.Drying efficiency is lowly the main cause causing energy resource consumption, improves drying efficiency extremely important.
Conventional hot air drying is that hot-air contacts with material to be dried, takes away the moisture on material surface with hot-air for dry medium.The wettability power of hot-air is not strong, and when therefore using hot-air as dry medium, dry rate-of flow is very big, and drying time is very long, inefficient.
Use superheated steam instead of air as dry medium, compared to hot-air, the wettability power of superheated steam is stronger, simultaneously, superheated steam is environmentally friendly, dry run non-oxidation or combustion reaction, and steam expansion work in decompressor, condensation of water is recovered energy, and reduces drying system energy consumption.But using superheated steam as dry medium, when drying system is still within normal pressure, dry temperature more than 100 DEG C, must so limit the use of superheat steam drying system.
Compared with drying system under normal pressure, vacuum drying is to be placed under condition of negative pressure by material, under condition of negative pressure, pressure differential is there is in the water in material with the dry medium of exsiccator, water in material, compared to being easier to evaporation under normal pressure, thus accelerating dry speed, saves drying time.
If superheated steam can be applied to vacuum drying system as dry medium, it is provided that the vacuum drying method of a kind of efficient energy-saving, not only increase dry speed, saved energy consumption for drying.
Summary of the invention
It is an object of the invention to propose that a kind of dry rate is higher, the less steam vacuum Quick drying system of energy consumption.
This system includes exsiccator, compressor, First Heat Exchanger, the second heat exchanger, decompressor and gas-liquid separator；
Above-mentioned First Heat Exchanger includes hot side entrance, hot side outlet, cold side input port and cold side outlet port；Second heat exchanger includes hot side entrance, hot side outlet, cold side input port and cold side outlet port；
Above-mentioned gas-liquid separator includes entrance, gaseous phase outlet and liquid-phase outlet；
The outlet of above-mentioned exsiccator is connected with the hot side entrance of First Heat Exchanger by compressor, and the hot side outlet of First Heat Exchanger and the hot side entrance of the second heat exchanger are connected, and the hot side outlet of the second heat exchanger is connected with gas-liquid separator entrance by decompressor；
The gaseous phase outlet of gas-liquid separator is connected with the cold side input port of First Heat Exchanger, and the cold side outlet port of First Heat Exchanger is connected with exsiccator entrance；The liquid-phase outlet of gas-liquid separator and the cold side input port of the second heat exchanger are connected, and the second heat exchanger cold side outlet port communicates with environment.
The method of work of steam vacuum Quick drying system of the present invention, it is characterised in that include procedure below:
The superheated steam of First Heat Exchanger cold side outlet port enters, as dry medium, the exsiccator that temperature is relatively low, with material to be dried by heat and mass coupling effect, moisture in material to be dried evaporates and diffuses in superheated steam, superheated steam takes the moisture in material out of, becomes the superheated steam that the degree of superheat is less, after being then passed through compressor compresses, the temperature and pressure of steam raises, then entering from the hot side of First Heat Exchanger, steam releases heat in First Heat Exchanger, and vapor (steam) temperature reduces；The hot side outlet of First Heat Exchanger and the second exchanger heat side entrance are connected, and steam flows through the second heat exchanger, and temperature reduces further；Steam reduces through decompressor, steam pressure and temperature, and now expander outlet precipitates out the mixture of steam and water；
The mixture of steam and water enters gas-liquid separator and carries out gas-liquid separation, saturated steam enters the cold side of First Heat Exchanger via gas-liquid separator gaseous phase outlet, heated by the high-temperature high-pressure steam of the hot side of First Heat Exchanger and become overheated steam, it is dried hence into exsiccator, so starts next round dry cycle；Condensed water flows out from gas-liquid separator liquid-phase outlet, enters the second cold side of heat exchanger, by the second exchanger heat side steam heating, and is discharged in environment.
According to a kind of steam vacuum Quick drying system of the present invention and method, it is characterised in that: compared with air drying medium when with uniform pressure, system that employs the higher steam of wettability power as dry medium；Compared with atmospheric operation condition, in exsiccator, vacuumizing improves the concentration difference of the moisture inside and outside material to be dried, thus being conducive to improving the speed of material to be dried dehumidification；Additionally, this system only needs the mechanical energy consuming compressor can realize running, and the decompressor adopted has reclaimed portion of energy, and the energy consumption that therefore system is overall is relatively low and pollution-free.
Accompanying drawing explanation
Fig. 1 is a kind of steam vacuum Quick drying system that the present invention proposes；
Number in the figure title: 1, exsiccator, 2, compressor, 3, First Heat Exchanger, the 4, second heat exchanger, 5, decompressor, 6, gas-liquid separator, 7, superheated steam, 8, condensed water, 9, material to be dried.
Detailed description of the invention
The work process of efficient energy-saving vacuum drying system is described referring to Fig. 1.
First exsiccator 1 is evacuated to a certain degree, is then turned on compressor 2 and makes drying system be operated with decompressor 5, make system operate steadily.
Superheated steam 7 as dry medium through exsiccator 1, due to the concentration difference between dry medium and material to be dried 9, superheated steam takes the moisture in material out of, become the superheated steam that the degree of superheat is less, after being then passed through compressor 2 compression, the temperature and pressure of steam raises, and then enters from the hot side of First Heat Exchanger 3, steam releases heat in First Heat Exchanger 3, and vapor (steam) temperature reduces；The hot side outlet of First Heat Exchanger 3 and the second hot side entrance of heat exchanger 4 are connected, and steam flows through the second heat exchanger 4, and temperature reduces further；Steam reduces through decompressor 5, steam pressure and temperature, and now decompressor 5 outlet precipitates out condensed water；
The mixture of steam and water enters gas-liquid separator 6 and carries out gas-liquid separation, saturated steam enters the cold side of First Heat Exchanger 3 via gas-liquid separator 6 gaseous phase outlet, heated by the high-temperature high-pressure steam of the hot side of First Heat Exchanger 3 and become overheated steam, it is dried hence into exsiccator 1, so starts next round dry cycle；Condensed water 8 flows out from gas-liquid separator 6 liquid-phase outlet, enters the second cold side of heat exchanger 4, by the second heat exchanger 4 hot side steam heating, and is discharged in environment.
Claims (2)
1. a steam vacuum Quick drying system, it is characterised in that:
This system includes exsiccator (1), compressor (2), First Heat Exchanger (3), the second heat exchanger (4), decompressor (5) and gas-liquid separator (6)；
Above-mentioned First Heat Exchanger (3) includes hot side entrance, hot side outlet, cold side input port and cold side outlet port；Second heat exchanger (4) includes hot side entrance, hot side outlet, cold side input port and cold side outlet port；
Above-mentioned gas-liquid separator (6) includes entrance, gaseous phase outlet and liquid-phase outlet；
The outlet of above-mentioned exsiccator (1) is connected by the hot side entrance of compressor (2) with First Heat Exchanger (3), the hot side outlet of First Heat Exchanger (3) and the hot side entrance of the second heat exchanger (4) are connected, and the hot side outlet of the second heat exchanger (4) is connected with gas-liquid separator (6) entrance by decompressor (5)；
The gaseous phase outlet of gas-liquid separator (6) is connected with the cold side input port of First Heat Exchanger (3), and the cold side outlet port of First Heat Exchanger (3) is connected with exsiccator (1) entrance；The liquid-phase outlet of gas-liquid separator (6) and the cold side input port of the second heat exchanger (4) are connected, and the second heat exchanger (4) cold side outlet port communicates with environment.
2. the method for work of steam vacuum Quick drying system according to claim 1, it is characterised in that include procedure below:
The superheated steam (7) of First Heat Exchanger (3) cold side outlet port enters, as dry medium, the exsiccator (1) that temperature is relatively low, with material to be dried (9) by heat and mass coupling effect, moisture in material to be dried (9) evaporates and diffuses in superheated steam (7), superheated steam takes the moisture in material out of, become the superheated steam that the degree of superheat is less, after being then passed through compressor (2) compression, the temperature and pressure of steam raises, then enter from the hot side of First Heat Exchanger (3), steam releases heat in First Heat Exchanger (3), and vapor (steam) temperature reduces；First Heat Exchanger (3) hot side outlet and the second heat exchanger (4) hot side entrance are connected, and steam flows through the second heat exchanger (4), and temperature reduces further；Steam reduces through decompressor (5), steam pressure and temperature, and now decompressor (5) outlet precipitates out the mixture of steam and water；
The mixture of steam and water enters gas-liquid separator (6) and carries out gas-liquid separation, saturated steam enters First Heat Exchanger (3) cold side via gas-liquid separator (6) gaseous phase outlet, heated by the high-temperature high-pressure steam of First Heat Exchanger (3) hot side and become overheated steam (7), it is dried hence into exsiccator (1), so starts next round dry cycle；Condensed water (8) flows out from gas-liquid separator (6) liquid-phase outlet, enters the second heat exchanger (4) cold side, the second heat exchanger (4) hot side steam heat, and be discharged in environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610126610.5A CN105758162A (en) | 2016-03-07 | 2016-03-07 | Water vapor vacuum rapid drying system and working method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610126610.5A CN105758162A (en) | 2016-03-07 | 2016-03-07 | Water vapor vacuum rapid drying system and working method |
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| CN105758162A true CN105758162A (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610126610.5A Pending CN105758162A (en) | 2016-03-07 | 2016-03-07 | Water vapor vacuum rapid drying system and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759441A (en) * | 2018-04-18 | 2018-11-06 | 浙江理工大学 | Drying device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000304449A (en) * | 1999-04-21 | 2000-11-02 | Sharp Corp | Air cycle drying system |
| CN102505435A (en) * | 2011-11-04 | 2012-06-20 | 南京航空航天大学 | Device and method for drying clothes at low temperature through mechanical vapor recompression (MVR) |
| CN202390689U (en) * | 2011-12-14 | 2012-08-22 | 南京航空航天大学 | Low-temperature energy-saving clothes drying device |
| CN103322783A (en) * | 2013-05-27 | 2013-09-25 | 南京航空航天大学 | Mechanical steam recompression overheated steam drying system and method |
| US8650770B1 (en) * | 2010-06-17 | 2014-02-18 | George Samuel Levy | Air cycle heat pump dryer |
| CN104034126A (en) * | 2014-06-20 | 2014-09-10 | 吴宏 | Superheated-steam drying system and process |
-
2016
- 2016-03-07 CN CN201610126610.5A patent/CN105758162A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000304449A (en) * | 1999-04-21 | 2000-11-02 | Sharp Corp | Air cycle drying system |
| US8650770B1 (en) * | 2010-06-17 | 2014-02-18 | George Samuel Levy | Air cycle heat pump dryer |
| CN102505435A (en) * | 2011-11-04 | 2012-06-20 | 南京航空航天大学 | Device and method for drying clothes at low temperature through mechanical vapor recompression (MVR) |
| CN202390689U (en) * | 2011-12-14 | 2012-08-22 | 南京航空航天大学 | Low-temperature energy-saving clothes drying device |
| CN103322783A (en) * | 2013-05-27 | 2013-09-25 | 南京航空航天大学 | Mechanical steam recompression overheated steam drying system and method |
| CN104034126A (en) * | 2014-06-20 | 2014-09-10 | 吴宏 | Superheated-steam drying system and process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759441A (en) * | 2018-04-18 | 2018-11-06 | 浙江理工大学 | Drying device and method |
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Application publication date: 20160713 |