CN109974411A - A kind of furnace drying method and energy-saving drying device - Google Patents
A kind of furnace drying method and energy-saving drying device Download PDFInfo
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- CN109974411A CN109974411A CN201910353457.3A CN201910353457A CN109974411A CN 109974411 A CN109974411 A CN 109974411A CN 201910353457 A CN201910353457 A CN 201910353457A CN 109974411 A CN109974411 A CN 109974411A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
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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
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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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
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of furnace drying methods, are dried using heat gas to article, specifically includes the following steps: article is placed in preset baking zone by (1), there is the baking zone furnace drying method heating gas inlet and heat gas to export；(2) heat gas is passed through the baking zone from the heating gas inlet, after heating to the article in the baking zone, the baking zone is discharged from heat gas outlet, wherein the heat gas being discharged from the baking zone is made to be divided into two strands；(3) it after successively one in two bursts of heat gas being dehumidified, heated, is passed into the baking zone again；(4) it is passed into the baking zone again after being heated another stock in two bursts of heat gas.A kind of low humidity furnace drying method of the invention, obvious energy conservation, the secondary moisture content by gas in drying area remove, and guarantee that baking zone domestic demand drying article generates dehydration phenomenon under low-humidity environment.
Description
Technical field
The invention belongs to drying equipment and furnace drying method technical fields, and in particular to a kind of furnace drying method and be based on the drying
The energy-saving drying device of method.
Background technique
Existing drying equipment in the market generally directlys adopt electrically heated mode and carries out heating, drying, or uses heat pump
Unit generates heat using compressor compresses refrigerant, is dried, will be dried by the heat given out after condenser heat exchange
The temperature in dry area increases, and achievees the purpose that the article drying in baking zone.But after the air heating in baking zone, air contains
Water greatly increases, although the humid air in drying area can be exhausted by way of sensor or timing setting,
And again suck extraneous air, carry out dry and wet air exchange.But this furnace drying method not only takes a long time, and energy consumption is high, and dries
Article after dry still contains certain moisture, when causing to be placed under normal temperature environment after article is dried by baking zone taking-up, object
Product temperature degree will appear " getting damp " phenomenon after reducing.
Summary of the invention
In view of this, in order to overcome the defects of the prior art, that there is provided a kind of efficiencies is high for an object of the present invention,
More energy saving and low humidity energy saving baking method.
In order to achieve the above object, the following technical solution is employed by the present invention:
A kind of furnace drying method, the furnace drying method dry article using heat gas, and the furnace drying method is specific
The following steps are included:
(1) article is placed in preset baking zone, there is the baking zone heating gas inlet and heat gas to export；
(2) heat gas is passed through the baking zone from the heating gas inlet, to the object in the baking zone
After product are heated, the baking zone is discharged from heat gas outlet, wherein making the heating gas being discharged from the baking zone
Body is divided into two strands；
(3) to after wherein one is dehumidified, is heated, being passed into the baking zone again in two bursts of heat gas
It is interior；
(4) it is passed into the baking zone again after being heated another stock in two bursts of heat gas.
Preferably, in step (3), by being cooled down to the heat gas to dehumidify to realize dehumidifying.
It is further preferred that heat recovery apparatus and cooling device is arranged in step (3), the heat recovery apparatus includes first
Heat exchanger channels and the second heat exchanger channels successively make this one gas being discharged from baking zone pass through the first of the heat recovery apparatus
Heat exchanger channels and cooling device carry out recuperation of heat and cooling, and the cooling gas come out from the cooling device is then passed into institute
The second heat exchanger channels are stated, the gas in first heat exchanger channels is after occurring heat exchange with the gas of second heat exchange pipeline
Discharge, the gas being discharged from second heat exchanger channels are passed into the baking zone after further heating.
Specifically, gas is delivered to after heating devices heat by heating gas inlet using air supply device described
Baking zone, the gas after heating dry article, pass through heat gas from the heat gas that the baking zone is discharged later
Outlet enters the first return air duct, and the heat gas is divided into two strands by first return air duct, and wherein one is returned by heat
The first heat exchanger channels and cooling device of receiving apparatus carry out recuperation of heat and cooling, the cooling gas that then will be come out from cooling device
The second heat exchanger channels are passed by the second return air duct, the gas in the first heat exchanger channels is through the gas with the second heat exchange pipeline
It is discharged after heat exchange occurs, the gas being discharged from the second heat exchanger channels is passed into the baking through third return air duct and after heating
In dry area；Another burst of heat gas enters the baking zone after directly heating.
Preferably, the heat gas in step (3) accounts for the volume for the heat gas that step (2) is discharged from the baking zone
20%-98%.
More specifically, the furnace drying method includes the following steps:
(1) air supply device is set, and air supply device operation feeds gas into heating device and heated, generates and add after heating
The gas A1 of heat；
(2) the gas A1 for generating above-mentioned steps (1) is sent into baking zone by heating gas inlet, the wind pressure in baking zone
Increase, is sent into the gas A1 in baking zone and baking zone after original gas mixing, the mixed gas temperature liter in baking zone
High, relative humidity reduces；
(3) baking zone domestic demand drying article is in the low environment of relative humidity in baking zone, the water of article in baking zone
Divide and evaporated to baking zone, article generates dehydrating phenomena, increases the relative humidity of gas in baking zone, forms relative humidity and increases
Gas B1；
(4) the gas B1 in above-mentioned steps (3) in baking zone is exported into discharge baking zone from heat gas and enters first
The heat gas being discharged from baking zone is divided into two strands by the first return air duct by return air duct, and wherein one gas B11 passes through
Heat recovery apparatus gas access enters heat recovery apparatus, and enters cooling device after going out from heat recovery apparatus gas vent and carry out
Cold and hot exchange, since cooling device temperature is lower, formation temperature declines, is opposite gas B11 after heat exchange in heat-exchange device
With after cooling device heat exchange, temperature decline, relative humidity increase to full conjunction state by the gas C1 that humidity increases, gas C1
Gas D1, gas D1 by the second return air duct enter heat recovery apparatus recycle entrance, in heat recovery apparatus, gas B11 with
Gas D1 carries out cold and hot exchange, and the temperature of gas B11 is reduced, and becomes the gas C1 that temperature reduces, relative humidity increases, gas
When C1 relative humidity reaches full conjunction state, the water recovery in gas C1 is discharged at droplet；Heat recovery apparatus is changed including first
The passage of heat and the second heat exchanger channels, gas B11 are located in a channel in the first heat exchanger channels or the second heat exchanger channels, gas
D1 is located in one channel of residue in the first heat exchanger channels or the second heat exchanger channels；Gas B11 is accounted for export from heat gas and be arranged
The 20%-100% of gas B1 total volume out；
Another gang of gas B10 that the heat gas being discharged from baking zone is separated by the first return air duct is direct through air supply device
Into baking zone；
(5) the gas C1 of relative humidity saturation state in above-mentioned steps (4) is sent by heat recovery area gas vent and is cooled down
Device is cooled down, and the temperature of gas C1 is reduced, and becomes that temperature reduces, relative humidity reaches the gas D1 of saturation state,
Water vapour in portion gas D1 condenses into droplet discharge again；
(6) temperature reduces in step (4) and step (5), relative humidity reaches the gas D1 of full conjunction state and enters recuperation of heat
Device recycle entrance, in heat recovery apparatus with gas B11 carry out it is cold and hot exchange, the cooling capacity of gas D1 is passed into gas B11,
Meanwhile gas B11 transfers heat to gas D1, and gas D1 is made to become the gas E1 that temperature increases, relative humidity reduces, gas
E1 recycles outlet discharge from heat recovery apparatus；
(7) the gas E1 that the temperature for forming step (6) increases, relative humidity reduces is entered again by third return air duct
Heat engine structure is heated, and generates the gas F1 that temperature increases, humidity further decreases, gas F1 enters air supply device, through blowing
Heat exchange is carried out with heating device after device pressurization, is sent into baking zone after heating again, formation temperature further increases, is relatively wet
Spend reduced gas A1；
Repeat the above steps (1) to step (7), dehumidification process in baking zone is completed in cycles, by the article in drying
Fast dewatering achievees the purpose that article is dried.
A kind of energy-saving drying device, the energy-saving drying device include drying room, are heated to gas to form heating
Heating device, the Xiang Suoshu drying room of gas convey the air supply device of the heat gas, add to from the drying room discharge
The heat recovery apparatus that hot gas cools down and the cooling device to gas progress dehumidification by condensation, the heat recovery apparatus include
First heat exchanger channels and the second heat exchanger channels, the drying room is interior to have baking zone.The energy-saving drying device further includes compression
Machine, refrigerant tubing and operate in refrigerant in the refrigerant tubing.
Preferably, first heat exchanger channels, which have, returns the heat gas that discharge is exported from heat gas into the heat
Receiving apparatus carries out the heat recovery apparatus gas access of heat exchange and the gas after heat exchange is discharged from the heat recovery apparatus
Heat recovery apparatus gas vent, second heat exchanger channels have cooling gas feeding after cooling will be carried out through apparatus for supercooling
The heat that the heat recovery apparatus of heat exchange recycles entrance and the cooling gas after heat exchange is discharged is carried out in heat recovery apparatus
Recyclable device recycling outlet.
It is further preferred that the heat recovery apparatus includes heat exchange pipeline and shell, second is formed in the heat exchange pipeline and is changed
The passage of heat forms the first heat exchanger channels between the heat exchange pipeline and the shell.
Preferably, the energy-saving drying device further includes the first return air duct, and first return air duct is connected to the baking
The heat gas outlet in dry area and first heat exchanger channels.
It is further preferred that the energy-saving drying device further includes for will recycle outlet output from the heat recovery apparatus
Gas or the third return air duct that the air supply device is delivered to from the gas that first return air duct exports.
Preferably, the energy-saving drying device further includes the cooling gas conveying having for will export from the cooling device
To the second return air duct of second heat exchanger channels.
In some embodiments, it is additionally provided with gas-filtering device between the air supply device and the baking zone, the gas
Body filter device heating device air outlet, to reduce the dust concentration in baking zone.It is additionally provided with and goes out in the baking zone
Bacterium device is generally arranged at baking zone inner top position, sterilizes to the article in baking zone.
It is further preferred that the energy-saving drying device further includes for will recycle outlet output from the heat recovery apparatus
Gas or the third return air duct that the air supply device is delivered to from the gas that first return air duct exports.Third backwind tube
Road is provided with reheating mechanism close to one end of air supply device, by the gas exported from heat recovery apparatus or from the first return air duct
The gas of output is heated.
Due to the implementation of above technical scheme, energy-saving drying device of the invention has following excellent compared with prior art
Point: a kind of low humidity furnace drying method of the invention has efficiency height, using energy source in extensive range, and baking zone is not exchanged with the external world
The characteristics of gas, carries out all of and the mode of recuperation of heat being taken, to cooling capacity and heat secondary use cooling capacity and heat
Method, relative to existing drying technology, energy conservation is more significant；It is secondary by gas in drying area and by recuperation of heat mode
In moisture content removal, the secondary recyclegas in baking zone heats, and keeps the relative humidity of gas in drying area obvious
It reduces, guarantees that baking zone domestic demand drying article generates dehydration phenomenon under low-humidity environment, the article in baking zone is dried.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the schematic diagram of the energy-saving drying device in the preferred embodiment of the present invention 1；
Fig. 2 is the schematic diagram of refrigerant flow direction in the energy-saving drying device of the preferred embodiment of the present invention 1；
In attached drawing: baking zone -1, heating device -2, air supply device -3, heat recovery apparatus -4, cooling device -5, then heat engine
Structure -6, gas-filtering device -7, bactericidal unit -8, the first return air duct -9, the second return air duct -10, third return air duct -
11, heating gas inlet -12, heat gas outlet -13, drainpipe -14, capillary (expansion valve) -16, compressor -19, heat time
Receiving apparatus gas access -20, heat recovery apparatus recycle entrance -21, heat recovery apparatus gas vent -22, heat recovery apparatus recycling
Outlet -23.
Specific embodiment
In order that those skilled in the art will better understand the technical solution of the present invention, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment
Only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to protection of the present invention
Range.
It should be noted that term " first " herein, " second " purpose are not limit convenient for distinguishing multiple objects
It is set for using.In addition, term " includes " and " having " and their any deformation, it is intended that covering non-exclusive includes example
Such as, process, method, device, product or the equipment for containing a series of steps or units those of are not necessarily limited to be clearly listed
Step or unit, but may include being not clearly listed or intrinsic for these process, methods, product or equipment other
Step or unit.
1 furnace drying method of embodiment
As shown in Figs. 1-2, a kind of furnace drying method of the present embodiment, to be dried using heat gas to article, drying
Method specifically includes:
(1) article is placed in preset baking zone 1, there is baking zone 1 heating gas inlet 12 and heat gas to export
13。
(2) heat gas is passed through baking zone 1 from heating gas inlet 12, after being heated to the article in baking zone 1,
From 13 discharge baking zone 1 of heat gas outlet, wherein the heat gas being discharged from baking zone 1 is made to be divided into two strands.
(3) it after successively one in two bursts of heat gas being dehumidified, heated, is passed into baking zone again；Pass through
This burst of heat gas is cooled down to realize dehumidifying.The gas to dehumidify accounts for the volume of gas exported from baking zone
20%-98%, preferably 30%-50%, more preferably 30%.
Heat recovery apparatus 4 and cooling device 5 are set, heat recovery apparatus 4 includes the first heat exchanger channels and the second heat exchanger channels,
This one gas being discharged from baking zone 1 is successively set to carry out heat by the first heat exchanger channels and cooling device 5 of heat recovery apparatus 4
Then the cooling gas come out from cooling device 5 is passed into the second heat exchanger channels by recycling and cooling, in the first heat exchanger channels
Gas is discharged after heat exchange occurs with the gas of the second heat exchange pipeline, and the gas being discharged from the second heat exchanger channels is further added
After heat, it is passed into baking zone 1.
(4) it is passed into baking zone 1 again after being heated another stock in two bursts of heat gas.
Specifically, gas is delivered to after the heating of heating device 2 by heating gas inlet 12 using air supply device 3
Baking zone 1, the gas after heating dry article and take away the moisture of article, the heating gas being discharged later from baking zone 1
Body enters the first return air duct 9 by heat gas outlet 13, and heat gas is divided into two strands by the first return air duct 9, wherein one
Stock carries out recuperation of heat and cooling by the first heat exchanger channels and cooling device 5 of heat recovery apparatus 4, then will be from cooling device 5
Cooling gas out is passed into the second heat exchanger channels by the second return air duct 10, and the gas in the first heat exchanger channels passes through and the
The gas of two heat exchange pipelines is discharged after heat exchange occurs, and the gas being discharged from the second heat exchanger channels is through third return air duct 11 and adds
After heat, it is passed into baking zone 1；Another burst of heat gas enters baking zone 1 after directly heating.
More specifically, the furnace drying method in the present embodiment includes the following steps:
(1) air supply device 3 is set, and air supply device 3 runs, feeds gas into heating device 2 and heated, generated after heating
The gas A1 of heating；
(2) the gas A1 for generating above-mentioned steps (1) is sent into baking zone 1 by heating gas inlet 12, in baking zone 1
Wind pressure increases, and is sent into the gas A1 in baking zone and baking zone 1 after original gas mixing, the mixed gas in baking zone 1
Temperature increases, relative humidity reduces；
(3) 1 domestic demand drying article of baking zone is in the environment that relative humidity is low in baking zone 1, article in baking zone 1
Moisture is evaporated to baking zone 1, and article generates dehydrating phenomena, increases the relative humidity of gas in baking zone 1, forms relative humidity
The gas B1 of increase；
(4) the gas B1 in above-mentioned steps (3) in baking zone 1 from 13 discharge baking zone 1 of heat gas outlet and is entered
The heat gas being discharged from baking zone 1 is divided into two strands by the first return air duct 9, wherein one gas by the first return air duct 9
B11 enters heat recovery apparatus 1 by heat recovery apparatus gas access 20, and enters after going out from heat recovery apparatus gas vent 22
Cooling device 5 carries out cold and hot exchange, since the temperature in cooling device 5 is lower, gas B11 heat exchange in heat-exchange device 4
The gas C1 that formation temperature decline, relative humidity increase afterwards, gas C1 are with after 5 heat exchange of cooling device, and temperature declines, relatively
Humidity increases to the gas D1 of full conjunction state, and gas D1 enters heat recovery apparatus by the second return air duct 10 and recycles entrance 21,
In heat recovery apparatus 4, gas B11 and gas D1 carry out it is cold and hot exchange, the temperature of gas B11 is reduced, become temperature reduce,
The gas C1 that relative humidity increases, when gas C1 relative humidity reaches full conjunction state, water recovery in portion gas C1 at
Droplet is discharged by drainpipe 14；
Heat recovery apparatus 4 includes the first heat exchanger channels and the second heat exchanger channels, and gas B11 is located at the first heat exchanger channels or the
In a channel in two heat exchanger channels, gas D1 is located at one channel of residue in the first heat exchanger channels or the second heat exchanger channels
It is interior；Gas B11 accounts for 20%-98%, the preferably 30%-50% of the gas B1 total volume from heat gas outlet discharge, more excellent
It is selected as 30%；
Another gang of gas B10 that the heat gas being discharged from baking zone 1 is separated by the first return air duct is straight through air supply device
It taps into baking zone 1；
(5) the gas C1 of relative humidity saturation state in above-mentioned steps (4) is sent by heat recovery apparatus gas vent 22
Cooling device 5 is cooled down, and the temperature of gas C1 is reduced, and becomes that temperature reduces, relative humidity reaches the gas of saturation state
Water vapour in body D1, portion gas D1 condenses into droplet again and is discharged by drainpipe 14；
(6) temperature reduces in step (4) and step (5), relative humidity reaches the gas D1 of full conjunction state and enters recuperation of heat
Device recycle entrance 21, in heat recovery apparatus 4 with gas B11 carry out it is cold and hot exchange, the cooling capacity of gas D1 is passed into gas
B11, meanwhile, gas B11 transfers heat to gas D1, and so that gas D1 is become the gas E1 that temperature increases, relative humidity reduces,
Gas E1 is discharged from heat recovery apparatus recycling outlet 23；
(7) the gas E1 that the temperature for forming step (6) increases, relative humidity reduces is entered by third return air duct 11
Reheating mechanism 6 is heated, and generates the gas F1 that temperature increases, humidity further decreases, gas F1 enters air supply device, through sending
Wind apparatus 3 with heating device 2 carries out heat exchange after pressurizeing, and is sent into baking zone 1 after heating again, formation temperature further increases,
The gas A1 that relative humidity reduces；
Repeat the above steps (1) to step (7), dehumidification process in baking zone 1 is completed in cycles, by the article in drying
Fast dewatering achievees the purpose that article is dried.
Above procedure understands for convenience and narration, is divided into step (1) to (7), in practical drying course, step
(1) it is carried out simultaneously to (7).
2 energy-saving drying device of embodiment
As shown in Figs. 1-2, a kind of energy-saving drying device of the present embodiment, including drying room, gas is heated with shape
At the heating device 2 of heat gas, the air supply device 3 to drying room conveying heat gas, the gas progress to drying room discharge
The heat recovery apparatus 4 of heat recovery, the first return air duct 9 for being connected to drying room and heat recovery apparatus 4 condense to gas and be removed
Wet cooling device 5, is used the second return air duct 10 for the gas exported from cooling device 5 to be delivered to heat recovery apparatus 4
It is returned in by the gas exported from heat recovery apparatus 4 or from the third that the gas that the first return air duct 9 exports is delivered to air supply device 3
Air piping 11.Baking zone 1 is preset in drying room.
Heat recovery apparatus 4 includes the first heat exchanger channels and the second heat exchanger channels, and heat recovery apparatus 4 includes in the present embodiment
Heat exchange pipeline and shell, heat exchange pipeline is interior to form the second heat exchanger channels, and the first heat exchanger channels are formed between heat exchange pipeline and shell.
Successively make the portion gas being discharged from baking zone 1 carry out heat by the first heat exchanger channels and cooling device 5 of heat recovery apparatus 4 to return
It receives and cooling, the cooling gas come out from cooling device 5 is then passed into the second heat exchanger channels, the gas in the first heat exchanger channels
Body is discharged after heat exchange occurs with the gas of the second heat exchange pipeline, and the gas being discharged from the second heat exchanger channels is further heated
Afterwards, it is passed into baking zone 1.That is gas B11 is located in a channel in the first heat exchanger channels or the second heat exchanger channels, gas
D1 is located in one channel of residue in the first heat exchanger channels or the second heat exchanger channels.
Third return air duct 11 is provided with reheating mechanism 6 close to one end of air supply device, will export from heat recovery apparatus 4
Gas or from the first return air duct 9 export gas heated.
Wherein, heat recovery apparatus 4 includes making the heat gas for exporting discharge from heat gas enter heat recovery apparatus 4 to carry out
The heat recovery apparatus gas access 20 of heat exchange and the heat recovery apparatus gas that the gas after heat exchange is discharged from heat recovery apparatus 4
Body outlet 22, and cooling gas after cooling will be carried out through apparatus for supercooling 5 and be sent into progress heat exchange in heat recovery apparatus 4
Heat recovery apparatus recycles entrance 21 and the heat recovery apparatus recycling outlet 23 by the cooling gas discharge after heat exchange.
Air supply device in the present embodiment includes air supply device 3 and heating device 2, between air supply device and baking zone 1
It is additionally provided with gas-filtering device 7, which is arranged in the air outlet of heating device 2, to reduce in baking zone 1
Dust concentration.
Bactericidal unit 8 is additionally provided in the present embodiment in baking zone 1, is generally arranged at 1 inner top position of baking zone, it is right
Article in baking zone 1 sterilizes.
System is passed sequentially through between each heating element such as heating device 2, reheating mechanism 6 and cooling-part such as cooling device 5
Cryogen pipeline carries out the conveying of refrigerant, and on the refrigerant tubing in the present embodiment between reheating mechanism 6 and cooling device 5
It is provided with capillary (expansion valve) 16, the gaseous refrigerant of normal temperature high voltage is compressed into the liquid refrigerant of normal temperature high voltage, such as
Shown in Fig. 2.
As shown in Figure 1, the work trend of gas is as follows in energy-saving drying device in the present embodiment, wherein arrow is representative
The trend of gas:
(1) start air supply device 3, gas F1 is sent into heating device 2, the high temperature and pressure in gas F1 and heating device 2
Refrigerant carry out heat exchange, gas F1 is cooling by refrigerant, refrigerant heats gas F1 simultaneously, makes gas F1 formation temperature
It increases, the gas A1 that relative humidity reduces；
(2) the gas A1 that the temperature that step (1) generates increases, relative humidity reduces is sent by heating gas inlet 12
Baking zone 1, the wind pressure in baking zone 1 increase, and are sent into the gas A1 in baking zone 1 and baking zone 1 after original gas mixing,
Increase the gas temperature in baking zone 1, relative humidity reduces；
(3) article of 1 domestic demand of baking zone drying is in the atmosphere that 1 temperature of baking zone increases, relative humidity is low, is dried
The moisture of article is evaporated to baking zone 1 in dry area, and article generates dehydrating phenomena, increases the relative humidity of gas in baking zone 1,
Form the gas B1 that relative humidity increases；
(4) the gas B1 in step (3) in baking zone 1 from 13 discharge baking zone 1 of heat gas outlet and is entered first
The heat gas being discharged from baking zone 1 is divided into two strands by the first return air duct 9, wherein one gas B11 by return air duct 9
Enter heat recovery apparatus 1, gas B11 formation temperature after heat exchange in heat-exchange device by heat recovery apparatus gas access 20
The gas C1 that decline, relative humidity increase, gas C1, which enter cooling device 5 after going out from heat recovery apparatus gas vent 22, to carry out
Cold and hot exchange, refrigerant are volatilized into gaseous state by liquid, absorb a large amount of heat, and the gas C11 temperature of process is reduced, is relatively wet
Degree increases to the gas D1 of full conjunction state, and gas D1 comes out from cooling device 5, recycles entrance 21 into heat recovery apparatus,
When gas D1 relative humidity reaches full conjunction state, the water recovery in gas D1 is discharged at droplet by drainpipe 14；It is another
Stock gas B10 reaches air supply device by the reheated mechanism 6 of third return air duct 11, is directly entered baking zone 1 later；Wherein,
The 20%-100% of the volume of gas exported from baking zone is accounted for into the gas in heat recovery apparatus gas access 20, preferably
30%-50%, more preferably 30%；
(5) the gas B11 in step (3) is sent into heat recovery apparatus gas access 20, the cooling come out from cooling device 5
Gas D1 is sent into heat recovery apparatus and recycles entrance 21, and gas B11 and gas D1 carry out heat exchange in heat recovery apparatus 4, by gas
The temperature of body B11 reduces, and gas B11 becomes the gas C1 that temperature reduces, relative humidity increases, and gas C1 relative humidity reaches full
Conjunction state, the water recovery in portion gas C1 instills accommodating container at droplet or is expelled directly out, eventually by drainpipe 14
Discharge；
Gas C1 comes out from heat recovery apparatus gas vent 22, into cooling device 5, is volatilized into gaseous system with by liquid
Cryogen carries out heat exchange, and gas C1 temperature further decreases, and relative humidity increases to the gas D1 of full conjunction state, gas D1 phase
When reaching full conjunction state to humidity, the water recovery in gas D1 is discharged at droplet by drainpipe 14；
(6) temperature reduces in step (4) and step (5), relative humidity reaches the gas D1 of full conjunction state and enters recuperation of heat
Device recycles entrance 21, carries out heat exchange with gas B11 in heat recovery apparatus 4, the cooling capacity of gas D1 is passed to gas
B11, the gas C1 that the temperature of gas B11 further decreases, humidity increases, gas C1 go out from heat recovery apparatus gas vent 22
Come, is cooled down into cooling device 5；Gas B11 transfers heat to gas D1, formation temperature raising, relative humidity simultaneously
Reduced gas E1 is flowed out from heat recovery apparatus recycling outlet 23；
(7) the gas E1 that the temperature for forming step (6) increases, relative humidity reduces is entered by third return air duct 11
Reheating mechanism 6, gas E1 carry out heat exchange with the refrigerant flowed through in reheating mechanism 6, and refrigerant temperature reduces, and gas E1 is formed
The gas F1 that temperature increases, humidity further decreases, gas F1 enter air supply device 3, fill after the pressurization of air supply device 3 with heating
2 carry out heat exchanges are set, baking zone 1, the gas A1 that formation temperature further increases, relative humidity reduces are sent into after heating again；
Repeat the above steps (1) to step (7), completes dehumidification process in baking zone in cycles, will be in drying area
Article fast dewatering achievees the purpose that article is dried.
Above procedure understands for convenience and narration, is divided into step (1) to (7), in practical drying course, step
(1) it is carried out simultaneously to (7).
Heat recovery apparatus 4 includes the first heat exchanger channels and the second heat exchanger channels, and gas B11 is located at the first heat exchanger channels or the
In a channel in two heat exchanger channels, gas D1 is located at one channel of residue in the first heat exchanger channels or the second heat exchanger channels
It is interior.Gas B11 and gas D1 carries out mode there are two types of heat exchanges i.e. in above-mentioned steps (6), first is that gas B11 is in heat recovery apparatus
4 outsides, and gas D1 enters the inside of heat recovery apparatus 4, is equivalent to B11 outside pipeline, and gas D1 is in pipeline；Second is that gas
Body B11 is inside heat recovery apparatus 4, and gas D1 enters the outside of heat recovery apparatus 4, is equivalent to B11 in pipeline, and gas
D1 is outside pipeline.Although two ways means are different, effect is identical, is all that the reduction of gas B11 temperature is made to become gas C1,
The raising of gas D1 temperature becomes gas E1.
The heat exchange method that the present embodiment uses is aforesaid way one.Heat recovery apparatus 4 is heat regenerator.
The work trend of refrigerant in 3 energy-saving drying device of embodiment
As shown in Fig. 2, the work trend of refrigerant is as follows in energy-saving drying device in embodiment 2, wherein arrow, that is, generation
The trend of table refrigerant:
(1) compressor 19 is set, when compressor 19 is run, internal refrigeration storage agent is compressed, the refrigeration of high temperature and pressure is formed
Agent is discharged from the exhaust outlet of compressor 19, and the refrigerant of high temperature and pressure enters heating device 2 by copper pipe；
(2) refrigerant of high temperature and pressure carries out heat exchange heat dissipation with gas F1 in heating device 2, and gas F1 is heated into
Gas A1, gas A1 enter baking zone 1, and the refrigerant for forming normal temperature high voltage is discharged from the outlet of heating device 2, enter through copper pipe
Reheating mechanism 6.
(3) in reheating mechanism 6, the gas E1 to come again with third return air duct 11 is carried out the refrigerant of normal temperature high voltage
Gas E1 is heated into gas F1 by heat exchange, and gas F1 is returned in air supply device, and the refrigerant after heat exchange is from reheating mechanism 6
Outlet comes out, and throttles through capillary (expansion valve) 16, the gaseous refrigerant of normal temperature high voltage is compressed into the liquid of normal temperature high voltage
State refrigerant.
(6) refrigerant of liquid from capillary (expansion valve) 16 come out after, into cooling device 5, due in cooling device 5
Volume increases suddenly, and refrigerant is volatilized into gaseous state by liquid, absorbs a large amount of heat, and 5 temperature of cooling device is reduced.Cooling dress
It sets 5 and carries out heat exchange with gas, will reduce and condense through the gas temperature of apparatus for supercooling 5.
(7) gaseous refrigerant is exported by cooling device 5 and is flowed out, and is back to compressor air suction mouth through copper pipe, is completed one and follow
Ring.
Above procedure understands for convenience and narration, is divided into step (1) to (7), in practical drying course, step
(1) it is carried out simultaneously to (7).
From figure 2 it can be seen that the refrigerant flow direction in energy-saving drying device in embodiment 2 is AA → AB → AC → AD
→ AE → AF → AG → AH → AI → AA forms a circulation.
4 results and discussion of embodiment
The down jackets that weight is 0.5 kilogram when one is parched, after cleaning drying, down jackets weight is 1.5 kilograms, then plumage
It is 1 kilogram that suede, which takes water content,.Using electric heating drying, heat pump drying and use the furnace drying method control of embodiment 1 as follows:
At one atm, 20 degrees Celsius of environment temperature, relative humidity 50%RH, the feelings that baking zone is 1 cubic metre
Under condition, baking zone temperature is risen to 55 degrees Celsius, the down jackets that water content is 1 kilogram are dried.Institute's calorific requirement is as follows:
About 4200 joules of the specific heat of water/(kilogram * degrees Celsius), when 1 kilogram of water is increased to 55 degrees Celsius by 20 degrees Celsius, institute
Calorific requirement is 4200* (55-20)=147000 Jiao Er；One kilogram of water is converted into steam and needs 2360 kilojoules=2360000 Jiao Er.
The down jackets drying that water content is 1 kilogram is always needed into heat are as follows: 147000+2360000=2507000 Jiao Er.
1 cubic metre of gas increases 1 degree Celsius, need to absorb 1290 Jiao Er heats, and 20 degrees Celsius of environment temperature, 1 cubic metre
Gas heating needs 1290* (55-20)=45150 Jiao Er to 55 degrees Celsius altogether.
One, it is dried using Electric heating:
At one atm, 20 degrees Celsius of environment temperature, relative humidity 50%RH, water content is about in 1 kilogram of gas
For 7.5g, 1 cubic meter of gas weight is 1.293 kilograms, and water content is 1.293*7.5=9.7 grams in 1 cubic meter of gas, temperature rise
To 55 degrees Celsius, when humidity 60%RH, gas water content is about 64 gs/kg, and water content is 1.293*64 in 1 cubic meter of gas
=82.75 grams.1 cubic meter of gas when temperature is increased to 55 degrees Celsius, can absorb 82.75-9.7=73.05 grams of water.1 kilogram of water
Drying need to take a breath baking zone: 1000/73.05=14 times, institute's calorific requirement is 14*45150=632100 Jiao Er.Using electric heating
Dry calorific requirement altogether are as follows: 2507000+6321000=3139100 Jiao Er.
When being dried using electric heating, when power is 1kw, generating heat per hour is 1000*3600=360000
Jiao Er.
Ventilation temperature rising-time: 45150/3600000*14=0.18 hours.
Drying time needed for 1 kilogram of water are as follows: 3139100/360000=0.87 hours.
When being dried using electric heating, required theoretical time are as follows: 0.87+0.18=1.05 hours.
Two, it is dried when using heat pump mode:
Under same power, heat pump Energy Efficiency Ratio is about 1:2.2, required time are as follows: 0.87/2.5=0.48 hours；Ventilation temperature rise
Time: 45150/3600000*14=0.18 hours；When using heat pump drying, required theoretical time are as follows: 0.18+0.18=0.36
Hour.
Three, it is dried using the method in embodiment 1:
Under same power, compression mechanism heat=compressor refrigerating capacity+compressor horsepower.The compressor refrigerating capacity of 1KW is about
For 2.2KW, heating capacity is about 3.2KW, and air circulation is about 1000 cubic meters/hour, and dehumidifying air quantity is 300 cubic meters/hour；Gas
Flow is 300/3600=0.08 cubes of meter per second.
1 cubic meter of gas reduces by 1 degree Celsius, need to discharge 1290 Jiao Er heats, be reduced to by evaporator temperature: 2200/
1290*0.08=21 degrees second Celsius, the sectional wind velocity by evaporator are about 2.5 meter per seconds, the temperature difference before and after evaporator are as follows: 21/
2.5=8.4 degree Celsius；Heat regenerator recovery efficiency is calculated for 80%.
When rigid start, when the temperature of gas B11 is 55 degrees Celsius, the temperature of gas D1 are as follows: 55-21/2.5=46.6
The temperature difference of degree, gas B11 and gas D1 are 55-46.6=8.4 degrees Celsius, and heat regenerator recovery efficiency is 80%, the temperature of gas E
Degree are as follows: 46.6+8.4/2*0.8=49.96 degrees Celsius, then the temperature of gas C1 is that 49.96+8.4/2*0.8=53.32 is Celsius
Degree.
Equipment continues to run, the temperature of gas C1 are as follows: 53.32 degrees Celsius；The temperature of gas D1 are as follows: 53.32-8.4=
44.92 degrees Celsius；The temperature of gas E1 are as follows: 44.92+8.4/2*0.8=48.28 degrees Celsius.
Equipment continuous service, the temperature of gas C1 are as follows: 55- (55-48.28) * 0.8=49.624 degree Celsius；Gas D1's
Temperature are as follows: 49.624-8.4=41.224 degrees Celsius；The temperature of gas E1 are as follows: 43.224+8.4/2*0.8=46.584 is Celsius
Degree.
It see the table below using the result that the method in embodiment 1 is dried:
The result that table 1 is dried using the method in embodiment 1
It in table 1, is calculated using average value 40g/, dehumidifying drying 1000/40/3600=0.007 hours.Actual use
In situation, the evaporation capacity that the dehumidifying time is mainly water is influenced.When the evaporation capacity of water can reach, use dehumanization method completely can be with
The water discharge that evaporation is generated.
From table 1 it follows that using the drying equipment of the dehumidifying drying method cooperation embodiment 2 in embodiment 1, row
Water increases rapidly, and dehumidifying drying is high-efficient.
Table 2 is electric heating, heat pump, the dehumidifying drying table of comparisons:
The comparison table of 2 different modes of table drying
Embodiment 2 is cooperated using the dehumidifying drying method in embodiment 1 from can be seen that in table 2 and above-mentioned narration
Drying equipment, dehumidifying drying is high-efficient, and effect is good, and low energy consumption.
Existing air-conditioning, the cooling capacity or heat generated just for compressor compresses refrigerant are utilized.When cooling, empty
Outer machine heat dissipation is adjusted, cooling capacity is freezed for room；When air-conditioning heating, outer machine distributes cooling capacity, and heat is heated for room.
The method of the present invention applies existing operation of air conditioner principle, and when compressor being made full use of to run, when compressor compresses refrigerant is generated
Cooling capacity and heat, and by recuperation of heat mode, the secondary moisture content by gas in drying area is removed, secondary in baking zone
Recyclegas heated, be substantially reduced the relative humidity of gas in drying area, guarantee baking zone domestic demand drying article
Dehydration (moisture content in drying article is needed quickly to escape from inside to outside) phenomenon is generated under low-humidity environment, by the object in baking zone
Product drying, while not needing to reach energy consumption reduction, while timesaving purpose to extraneous exchanging gas.
Furnace drying method and drying equipment of the invention, due to using dehumidifying drying method, is dried in actually drying
Humidity locating for dry area's article, dehumidifying drying will be significantly less than other two kinds of baking zone humidity, and humidity locating for baking zone article is got over
Low, the moisture content that volatilizees outward is faster, so when using dehumidifying drying method, the baking zone article moisture content that volatilizees outward will be apparently higher than it
Its two kinds of furnace drying method.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention, it is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of furnace drying method, which is characterized in that the furnace drying method dries article using heat gas, the drying
Method specifically includes the following steps:
(1) article is placed in preset baking zone, there is the baking zone heating gas inlet and heat gas to export；
(2) heat gas is passed through the baking zone from the heating gas inlet, to the article in the baking zone into
After row heating, the baking zone is discharged from heat gas outlet, wherein making the heat gas point being discharged from the baking zone
It is two strands；
(3) to after wherein one is dehumidified, is heated, being passed into the baking zone again in two bursts of heat gas；
(4) it is passed into the baking zone again after being heated another stock in two bursts of heat gas.
2. furnace drying method according to claim 1, which is characterized in that in step (3), by the institute to dehumidify
Heat gas is stated to be cooled down to realize dehumidifying.
3. furnace drying method according to claim 2, which is characterized in that in step (3), setting heat recovery apparatus and cooling dress
It sets, the heat recovery apparatus includes the first heat exchanger channels and the second heat exchanger channels, successively makes this one gas being discharged from baking zone
Body carries out recuperation of heat and cooling by the first heat exchanger channels and cooling device of the heat recovery apparatus, then will be from the cooling
The cooling gas that device comes out is passed into second heat exchanger channels, and the gas in first heat exchanger channels passes through and described second
The gas of heat exchange pipeline is discharged after heat exchange occurs, and the gas being discharged from second heat exchanger channels leads to after further heating
Enter into the baking zone.
4. furnace drying method according to claim 1, which is characterized in that the heat gas in step (3) accounts for step (2) from institute
State the volume 20%-98% of the heat gas of baking zone discharge.
5. a kind of energy-saving drying device, which is characterized in that the energy-saving drying device include drying room, to gas heated with
Heating device, the Xiang Suoshu drying room for forming heat gas convey the air supply device of the heat gas, to from the drying room
The heat recovery apparatus that the heat gas of discharge cools down and the cooling device to gas progress dehumidification by condensation, the recuperation of heat
Device includes the first heat exchanger channels and the second heat exchanger channels, has baking zone in the drying room.
6. energy-saving drying device according to claim 5, which is characterized in that first heat exchanger channels have make from heating
Gas vent discharge heat gas enter the heat recovery apparatus carry out heat exchange heat recovery apparatus gas access and will be hot
The heat recovery apparatus gas vent that gas after exchange is discharged from the heat recovery apparatus, second heat exchanger channels have will be through
Apparatus for supercooling carries out cooling gas after cooling and is sent into heat recovery apparatus the heat recovery apparatus recycling entrance for carrying out heat exchange
Outlet is recycled with by the heat recovery apparatus being discharged by the cooling gas after heat exchange.
7. energy-saving drying device according to claim 6, which is characterized in that the heat recovery apparatus include heat exchange pipeline and
Shell, the heat exchange pipeline is interior to form the second heat exchanger channels, and it is logical that the first heat exchange is formed between the heat exchange pipeline and the shell
Road.
8. energy-saving drying device according to claim 5, which is characterized in that the energy-saving drying device further includes first time
Air piping, the heat gas that first return air duct is connected to the baking zone exports and first heat exchanger channels.
9. energy-saving drying device according to claim 5, which is characterized in that the energy-saving drying device further includes being used for
The cooling gas exported from the cooling device is delivered to the second return air duct of second heat exchanger channels.
10. energy-saving drying device according to claim 8, which is characterized in that the energy-saving drying device further includes being used for
It is delivered to by the gas for recycling outlet output from the heat recovery apparatus or from the gas that first return air duct exports described
The third return air duct of air supply device.
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| CN111473617A (en) * | 2020-04-24 | 2020-07-31 | 安徽欧瑞达电器科技有限公司 | Energy-saving drying method |
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