CN106500493A - Two-part function of mechanical steam recompression MVR drying systems and its drying meanss - Google Patents
Two-part function of mechanical steam recompression MVR drying systems and its drying meanss Download PDFInfo
- Publication number
- CN106500493A CN106500493A CN201610991928.XA CN201610991928A CN106500493A CN 106500493 A CN106500493 A CN 106500493A CN 201610991928 A CN201610991928 A CN 201610991928A CN 106500493 A CN106500493 A CN 106500493A
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- Prior art keywords
- steam
- exsiccator
- air
- compressor
- drying
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- F26B21/003—Supply-air or gas filters
-
- 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
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention relates to a kind of two-part function of mechanical steam recompression MVR drying systems and its drying meanss, belong to dry materials field.The system constitutes the first dryer section closed circuit by compressor, the first exsiccator, cyclone dust extractor, steam reheater head and the tail connection, and cyclone entrance is connected with suction port of compressor.The closed circuit that the second dryer section is constituted by circulating fan, the second exsiccator, steam reheater connection, loop are provided with exhaust valve and air inlet valve, and air draft valve outlet port is connected with air return heating device for hot with air inlet valve import.First, second dryer section cycles through steam reheater and is coupled.The constant speed drying section of material adopts MVR superheat steam dryings, deceleration drying section to dry using hot-air.The hot-air of the second dryer section reclaims the latent heat of condensation of the first dryer section indirect steam.System has the low feature of dry rate is fast, efficient energy-saving, dry materials are ended equilibrium moisture content.
Description
Technical field
The present invention relates to a kind of two-part function of mechanical steam recompression MVR drying systems and its drying meanss, belong to material and do
Dry technical field.
Background technology
Drying is the important process process in commercial production, adds in agricultural, food, chemical industry, pottery, medicine, agricultural byproducts
Nearly all industrial field such as work is directed to dry link.The energy requirement of dry run is larger, develops efficient, energy-saving drying
System significance is great.
Superheat steam drying is a kind of brand-new drying meanss developed in recent years, big, dry with heat transfer coefficient is dried
The advantages of dry efficiency high, resistance to mass tranfer are little, product drying quality is good.The generation of superheated steam can adopt heating or both vapor compression
Method.Function of mechanical steam recompression MVR is dried and is referred to：Machinery pressure is carried out by compressor to the indirect steam that dry run is produced and contracts reaching
To superheat state, superheated steam is re-used for the heating of dry run afterwards.Patent CN103322783A discloses a kind of " machine
Tool vapor recompression superheat steam drying system and method ", but due to after the pressure of water vapour compressor the degree of superheat relatively small, such as
Fruit superheated steam degree of superheat during dried material is eliminated, that is, reach saturation, and dry run will be unable to proceed,
Material even occurs and is saturated the phenomenons such as steam humidification condensation, and dried material is difficult to obtain relatively low moisture content.
Content of the invention
The purpose of the present invention is the deficiency existed for above-mentioned prior art, there is provided a kind of two-part mechanical vapour is pressed again
Contracting MVR drying systems and its drying meanss.
A kind of two-part function of mechanical steam recompression MVR drying systems, it is characterised in that：Including compressor, cyclone dust extractor,
First exsiccator, steam reheater, circulating fan, the second exsiccator, air return heating device for hot；The outlet of above-mentioned compressor is dry with first
The entrance of dry device is connected, and the outlet of the first exsiccator is connected with the entrance of cyclone dust extractor, and the outlet of cyclone dust extractor is divided into the
One branch road and the second branch road, wherein tie point are connected with the steam inlet of steam reheater, the steam (vapor) outlet of steam reheater
It is connected with the entrance of compressor together with above-mentioned second branch road；Raw steaming is further connected with the pipeline of compressor outlet to the first exsiccator
Steam pipe；The steam reheater is provided with solidifying water comb；The outlet of above-mentioned circulating fan is connected with the entrance of the second exsiccator, and second
The outlet of exsiccator is connected with the air intake of steam reheater, the air outlet slit of steam reheater and circulating fan entrance phase
Even；Be connected to exhaust valve and air inlet valve on the pipeline of the second exsiccator to steam reheater, the outlet of exhaust valve with enter
The import of air-valve is connected with air return heating device for hot.
The drying meanss of described two-part function of mechanical steam recompression MVR drying systems, it is characterised in that including following mistake
Journey：First, the material that raw steam is heated in the first exsiccator is opened, after material is heated to baking temperature, raw steam is closed,
And open compressor；The indirect steam that material moisture gasification is generated in first exsiccator is through the entrained powder of cyclone dust extractor removing
After the impurity such as dirt, a part goes to steam reheater condensation liquefaction, the uncondensated steam one that another part is exported with steam reheater
Rise and heated up by compressor boost, form the superheated steam with certain degree of superheat；Superheated steam enters the first exsiccator afterwards, and
Realize that the caloic for treating dry material is exchanged；When the moisture content of material in the first exsiccator is down to the perseverance of critical moisture content, i.e. material
At the end of warm dry run, the material in the first exsiccator is transferred in the second exsiccator, and by the first exsiccator again
It is put into new material；Air in second exsiccator is heated up by steam reheater, is entered in the presence of circulating fan
Second exsiccator simultaneously realizes the hot and humid area to material, after the relative humidity of circulation air increases to setting value, opens exhaust valve
With air inlet valve, the sensible heat and part latent heat of the dry air by air return heating device for hot recovery discharge High Temperature Moist Air of system is entered.
Superheat steam drying and hot-air are dried skill by the two-part function of mechanical steam recompression MVR drying systems of the present invention
Art is organically combined, and has given full play to the technical advantage of two kinds of drying meanss.The dry materials initial stage（Material water ratio compared with
High）Constant rate drying period by the first dryer section, i.e. superheat steam drying circulation is completed；The dry materials later stage（Material water ratio
Relatively low）Deceleration drying section by the second dryer section, i.e. hot-air dry cycle is completed.The hot-air of the second dryer section is cycled through
Steam reheater reclaims the latent heat of condensation of steam in the first dryer section.System application air return heating device for hot reclaims the second dryer section and excludes
Hot wet air heating in heat, and for heating the new dry air for entering drying system, the heat of dry run is recycled,
System has dry rate faster, while low-water-content index request when can realize that dry materials are ended.
Description of the drawings
Fig. 1 is a kind of two-part function of mechanical steam recompression MVR drying system schematic diagrams of the present invention；
In figure, 1 is compressor, and 2 is cyclone dust extractor, and 3 is the first exsiccator, and 4 is steam reheater, and 5 is circulating fan, and 6 are
Second exsiccator, 7 is exhaust valve, and 8 is air return heating device for hot, and 9 is air inlet valve.
Specific embodiment
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings, example is served only for explaining this
Invention, is not intended to limit the scope of the present invention.
Fig. 1 is the schematic diagram of the present invention.A kind of two-part function of mechanical steam recompression MVR drying systems, including compressor 1,
Cyclone dust extractor 2, the first exsiccator 3, steam reheater 4, circulating fan 5, the second exsiccator 6, exhaust valve 7, air return heating device for hot
8, air inlet valve 9.First is constituted by compressor 1, the first exsiccator 3, cyclone dust extractor 2, steam reheater 4 successively head and the tail connection dry
Dry section of closed circuit, cyclone entrance are connected with suction port of compressor pipeline, and compressor outlet is to the first exsiccator
Raw steam pipe is connected on circulating line.By the circulating fan 5, the second exsiccator 6, steam reheater 4 successively head and the tail connection group
Into the closed circuit of the second dryer section, exhaust valve 7 is connected on the pipeline of the second exsiccator to steam reheater and is entered
Air-valve 9, the outlet of exhaust valve are connected with air return heating device for hot 8 with the import of air inlet valve.The closed circuit of the first dryer section and
The closed circuit of two dryer sections is coupled by steam reheater 4.
The compressor 1 adopts centrifugal compressor, the employing of the first exsiccator 3 percolation chamber dryer, and described second
Exsiccator 6 adopts plate type heat exchanger using percolation chamber dryer, the steam reheater 4, and the air return heating device for hot 8 adopts plate
Formula heat exchanger.
The operation principle of the present invention is as follows：
After system start-up, the material that raw steam is heated in the first exsiccator 3 is opened, after material is heated to baking temperature, closed
Raw steam is closed, and opens compressor 1.The indirect steam that material moisture gasification is generated in first exsiccator is de- through cyclone dust extractor 2
After except impurity such as entrained dust, a part goes to 4 condensation liquefaction of steam reheater, and another part passes to suction port of compressor simultaneously
Heated up by compressor boost together with the uncondensated steam of steam reheater outlet, form the superheated steam with certain degree of superheat,
Superheated steam enters the first exsiccator afterwards, and realizes that the caloic for treating dry material is exchanged.When material contains in the first exsiccator
At the end of water rate is down to the freeze-day with constant temperature process of critical moisture content, i.e. material, the material in the first exsiccator is transferred to second
In exsiccator, and new material will be reentered in the first exsiccator 3.Air in second dryer section passes through 4 quilt of steam reheater
Heat temperature raising, enters the second exsiccator 6 in the presence of circulating fan 5 and realizes the hot and humid area to material, work as circulation air
Relative humidity increase to setting value after, open exhaust valve 7 and air inlet valve 9, enter the dry air of system by air return heating device for hot 8 times
Receive the sensible heat and part latent heat for discharging High Temperature Moist Air.
The dry run of material is divided into two sections and is completed by the present invention, and constant speed drying section is using superheated steam cyclic drying, drop
Fast dryer section adopts hot-air cyclic drying, and the condensation of the indirect steam circulated using hot-air circulation and stress superheated steam is dived
Heat.Take full advantage of superheat steam drying speed fast, be air-dried material balance moisture content low the characteristics of, energy saving of system is efficient.
Although above in association with accompanying drawing, invention has been described, the invention is not limited in above-mentioned being embodied as
Mode, above-mentioned specific embodiment are only illustrative, rather than restricted, and one of ordinary skill in the art is at this
Under bright enlightenment, without deviating from the spirit of the invention, many variations can also be made, these belong to the guarantor of the present invention
Shield scope.
Claims (2)
1. a kind of two-part function of mechanical steam recompression MVR drying systems, it is characterised in that：
Including compressor（1）, cyclone dust extractor（2）, the first exsiccator（3）, steam reheater（4）, circulating fan（5）, second
Exsiccator（6）, air return heating device for hot（8）；
Above-mentioned compressor（1）Outlet and the first exsiccator（3）Entrance be connected, the first exsiccator（3）Outlet remove with whirlwind
Dirt device（2）Entrance be connected, cyclone dust extractor（2）Outlet be divided into tie point and the second branch road, wherein tie point and steaming
Vapour regenerator（4）Steam inlet be connected, steam reheater（4）Steam (vapor) outlet together with above-mentioned second branch road with compressor
（1）Entrance be connected；Compressor（2）It is exported to the first exsiccator（3）Pipeline on be further connected with raw steam pipe；The steam backheat
Device（4）It is provided with solidifying water comb；
Above-mentioned circulating fan（5）Outlet and the second exsiccator（6）Entrance be connected, the second exsiccator（6）Outlet and steam
Regenerator（4）Air intake be connected, steam reheater（4）Air outlet slit and circulating fan（5）Entrance is connected；
In the second exsiccator（6）To steam reheater（4）Pipeline on be connected to exhaust valve（7）With air inlet valve（9）, air draft
Valve（7）Outlet and air inlet valve（9）Import and air return heating device for hot（8）Connection.
2. drying meanss of two-part function of mechanical steam recompression MVR drying systems according to claim 1, it is characterised in that
Including procedure below：
First, open raw steam and heat the first exsiccator（3）Interior material, after material is heated to baking temperature, closes life
Steam, and open compressor（1）；The indirect steam that material moisture gasification is generated in first exsiccator is through cyclone dust extractor（2）De-
After except impurity such as entrained dust, a part goes to steam reheater（4）Condensation liquefaction, another part and steam reheater
（4）The uncondensated steam of outlet is together by compressor（1）Supercharging heats up, and forms the superheated steam with certain degree of superheat；Cross afterwards
Vapourss enter the first exsiccator（3）, and realize that the caloic for treating dry material is exchanged；
When the first exsiccator（3）At the end of the moisture content of interior material is down to the freeze-day with constant temperature process of critical moisture content, i.e. material, will
First exsiccator（3）Interior material is transferred to the second exsiccator 6）Interior, and by the first exsiccator（3）New material is inside reentered into；
Second exsiccator（6）Interior air passes through steam reheater（4）It is heated up, in circulating fan（5）In the presence of enter
Enter the second exsiccator（6）And the hot and humid area to material is realized, and after the relative humidity of circulation air increases to setting value, the row of unlatching
Air-valve（7）With air inlet valve（9）, the dry air of system is entered by air return heating device for hot（8）Reclaim the sensible heat for discharging High Temperature Moist Air
With part latent heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610991928.XA CN106500493A (en) | 2016-11-11 | 2016-11-11 | Two-part function of mechanical steam recompression MVR drying systems and its drying meanss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610991928.XA CN106500493A (en) | 2016-11-11 | 2016-11-11 | Two-part function of mechanical steam recompression MVR drying systems and its drying meanss |
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| Publication Number | Publication Date |
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| CN106500493A true CN106500493A (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610991928.XA Pending CN106500493A (en) | 2016-11-11 | 2016-11-11 | Two-part function of mechanical steam recompression MVR drying systems and its drying meanss |
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