CN107764035A - For the method and arrangement recycled to the air in drying process - Google Patents
For the method and arrangement recycled to the air in drying process Download PDFInfo
- Publication number
- CN107764035A CN107764035A CN201610770977.0A CN201610770977A CN107764035A CN 107764035 A CN107764035 A CN 107764035A CN 201610770977 A CN201610770977 A CN 201610770977A CN 107764035 A CN107764035 A CN 107764035A
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- Prior art keywords
- air stream
- drying process
- discharge air
- discharge
- recycled
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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
- F26B21/003—Supply-air or gas filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- 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
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- 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
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- 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
-
- 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
- F26B21/083—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves
-
- 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
-
- 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
-
- 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Drying Of Solid Materials (AREA)
- Treating Waste Gases (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
The application is related to the method and arrangement for being recycled to the air in drying process.The application is related to the method for being recycled to the air in drying process (1), wherein, in drying process (1), moisture removal air inlet stream is removed from product, produces discharge air stream (2a).Discharge air stream (2a) is directed to device (3), wherein, reduces the moisture of discharge air stream (2a).The discharge air stream (2b c) of separating device (3) is at least divided into：It is recycled to the air stream (2b) of drying process (1) and reaches the air stream (2c) of at least one room related to drying process (1).The application further relates to be used for the arrangement for recycling the air in drying process (1).
Description
Technical field
The present invention relates to the method and arrangement for being recycled to the air in drying process.
Background technology
Drying is high energy consumption operation, and this is due to the high latent heat of steam and hot-air is used as to the poorly efficient institute of dried medium
It is caused.In typical industry, drying process moisture air inlet stream is removed from product, produces the discharge air full of moisture
Stream.
It is for the factory for including drying process from the discharge air recovery heat full of moisture and by the heat of recovery
It is known.Then the discharge air stream full of moisture of cooling is discharged into air, it is possible to create effluent.It is local at some,
Even the plume for discharging clean vapor is also unacceptable.Visible vapor plume can turn into the people that lived near factory
The worry of mouth.In addition, plume induce haze and icing improves accident risk and may be for crop and equipment
Dangerous.
If itself recycled to the discharge air full of moisture in the factory, this needs to carry out dehumidification and discharge is empty
The cooling of gas, and combine and remove unwanted particle, then it can be reused again.But in drying
Moisture removal be typically insufficient, and need to mix fresh dried air with the discharge air through dehumidification, to obtain
Acceptable moisture content level is reused.In addition, dehumidification and the cost of cooling installation cause the discharge full of moisture
The recycling of air is nonprofit.
The content of the invention
It is an object of the invention to solve drawbacks described above and provide efficient and cost-effective method, and for realizing
The arrangement of this method, so as to be recycled to the air in drying process.
According to the method for being recycled to the air in drying process of independent claims 1, and according to only
Vertical claim 10 for the arrangement that is recycled to the air in drying process, to realize the target.Appurtenance will
The preferred embodiment of the present invention is further disclosed in asking.
In the method for recycling the air in drying process, in the drying process, go to remove water from product
Divide air inlet stream, produce discharge air stream.Discharge air stream is directed to device, wherein, reduces discharge air stream
Moisture.The discharge air stream of separating device is at least divided into：It is recycled to the air stream of drying process and reaches and do
The air stream of the related at least one room of drying process.
Arrangement for being recycled to the air in drying process includes the discharge air stream from drying process.Should
Arrangement includes being used to reduce the device of the moisture of discharge air stream.The arrangement includes following instrument, and the instrument is used for will
The discharge air stream of separating device is at least divided into：It is recycled to the air stream of drying process and reaches related to drying process
The air stream of at least one room.
The advantages of method and arrangement of the present invention is, the amount for the discharge air stream that can be discharged into air and can
The formation of water breakthrough steam plume minimizes.
Brief description of the drawings
With reference to the accompanying drawings, the present invention is described in more detail by preferred embodiment, wherein：
Fig. 1 shows the arrangement for being recycled to the air in drying process；
Fig. 2 shows the arrangement for being recycled to the air in the drying process with heat recovery exchanger.
Embodiment
Fig. 1 shows the arrangement for being recycled to the air in drying process.In drying process 1, gone from product
Moisture removal enters stream of hot air, produces the discharge air stream 2a full of moisture.Preferably, drying process 1 is that continuous high-energy consumption is dry
Drying process, wherein, the discharge air stream 2a full of moisture can be including such as 130-160 grams of vapor per kg air.Continuously
The example of high energy consumption drying process is the drying of paper, paper pulp, timber, timber or waste slurry.
Device 3 reduces discharge air stream 2a moisture.For example, device 3 to discharge air stream 2a cooled down with
Moisture removal is removed, either absorbs moisture or from discharge air stream 2a adsorption moistures from discharge air stream 2a, or carry out these three
Any combination.The decline of discharge air 2a moisture reduces in the discharge air stream 2a when it is discharged from device 3
Visible vapor.As water vapor condensation and the result of water droplet is formed, vapor becomes visible.Cloud or mist are visible air
Vapor form.
The discharge air stream 2b-c of at least part separating device 3 is recycled to drying process 1.Discharge in air stream 2b-c
The reduction of vapor and discharge air b-c recycling, it reduce the amount for the discharge air stream for being discharged into air with can
The formation of water breakthrough steam plume.
The plume of discharge air 2a full of moisture has high moisture content, is under some weather conditions discharged into them
Air and the formation that visible plume can be caused without sufficient moisture removal.It can be seen that the formation of vapor plume depends on meteorology
Condition, for example, wind speed, wind direction, atmospheric stability grade, environment temperature, mixing height and surrounding air relative humidity.Pass through
Vapor is removed from discharge air 2a with device 3, reduces the generation of visible vapor plume and the length and height of plume.
The discharge air stream 2b-c of separating device 3 is at least divided into：It is recycled to the air stream 2b of drying process and arrives
Up to the air stream 2c of at least one room related to drying process.For example, the air stream 2b being divided into up to drying process account for from
Open air stream 2b-c 65-85%, and the air stream 2c being divided into up at least one room related to drying process account for from
Open air stream 2b-c 35-15%.It is not anti-leak around the space of drying process 1, and normally enters the space again
Cyclic drying air 2b amount is less than the amount for the discharge air 2a full of moisture for taking (draw from) away from the space.
The exemplary of the room related to drying process 1 is completion process chamber, service clearance, control and electric apparatus room.From from
Opening apparatus 3 can be used for for drying process 1 by the air stream 2c dried and the discharge air stream 2b-c of cooling is branched away
Heated, cooled down or divulged information in related one or more rooms.
When winter, in many geographical position, the temperature of moisture and surrounding air is low.For these days
Gas bar part, the possibility that visible vapor plume occurs uprise.In addition, enter entering for the room related to drying process 1 from outdoor
Mouth air needs to be heated and be preferably humidified, for maintaining the ideal operation condition of personnel and millwork.To also
It is favourable that discharge air 2b, which is recycled to the room related to drying process 1, because which improve their intake air quality
Reduce the amount for the discharge air stream for being discharged into air simultaneously and reduce the formation of visible vapor plume.For in drying
The method and arrangement of air recycling in technique realizes the complete recycling of the discharge air on factory's steady production stream, special
Not during the cold and dry season of 1 year.
In an embodiment for the method and arrangement of the air recycling in drying process, washed using wet type
Device 28 is washed to reduce the temperature and moisture of the discharge air 2a full of moisture from drying process 1, i.e. in wet scrubbing
The discharge air 2a full of moisture is dried in device 28.Drying of the washer 28 for the discharge air full of moisture is that have
Profit, because being provided for the large volume for conducting heat with mass transfer.Wet scrubber 28 is cost-effective, because compared to normal
In straightedge formula heat exchanger system or shell for tubular type heat exchanger system, it is necessary to heat transfer and mass transfer surfaces it is at a fairly low.This
Outside, washer 28 also eliminates unwanted material from the discharge air 2a full of moisture.The example of removable material be ash,
Dirt, sapid steam and water-soluble chemicals.
In Fig. 1, the discharge air stream 2a full of moisture of self-desiccation in future technique 1 is directed to wet scrubber 28, uses
In the moisture and temperature that reduce discharge air stream 2a.The discharge air 2b of part is recycled to drying process 1, and will
Partial discharge air 2c imports at least one room related to drying process 1.
Washer 28 includes the scrubbing tower with circular bottom surface 4 and circular cylindrical shell 5.Another bottom shape can be example
Such as rectangle.The discharge air stream 2a of moisture be will be filled with via the base section 6 of the horizontally-guided of entrance opening 7 to wet scrubber tower.
Being oriented to for stream can include pressurizeing to the discharge air stream full of moisture with one or more air blowers 8.
In washer 28, discharge air stream 2a is flowed up, and the drop 9 of cooling water 10 injects from multiple nozzles 11
Into discharge air stream.Cooling water droplet 9 flows downward in a manner of with discharge air stream 2a adverse currents.Discharge air full of moisture
2a collides turbulization area with cooling water 10, and wherein, air/water interface continues and quick renewal.By in washer 28
Discharge air 2a and wash cooling water 10 be thoroughly mixed, have effectively achieved washing.
When air arrive at its water vapor capacity and can keep at a certain temperature containing it all vapor when, it is empty
Gas is saturation.In saturated air, water vapour content is equal to its capacity.In dew-point temperature, air is saturation, and dew point
The temperature when relative humidity for being air is 100%.In washer 28, the dew-point temperature of cooling water 10 is less than discharge air stream
2a dew-point temperature.
Discharge air 2b-c through drying and cooling down is from washer 28 via positioned at one of the top section 13 of washer shell 5
Or multiple discharge air outlet slits 12 are discharged.Washer 28 may include the outlet for leading to air, its startup in such as washer 28
Or used during pause.
In another embodiment of method and arrangement, the discharge air 2b-c left state can be controlled
System.Arrangement may include the discharge air stream 2b-c temperature and the device of moisture that washer 28 is left for measuring.Can be with
Contain for example, by wet type and dry type globe thermometer to measure the discharge air 2b-c left from washer 28 temperature and moisture
Amount, or other online humidity measuring instruments can be used.
Arrangement may include that measurement temperature and moisture content value for the discharge air stream 2b-c to leaving are entered with setting value
The device 15 of row contrast.It can be contrasted with the control algorithm provided in such as control device or computer.
In method, the discharge air stream 1b-c of washer 28 temperature and moisture is left in measurement, for what is left
Air stream 2b-c is discharged, the temperature measured and moisture content value are contrasted with setting value, and based on comparing result, control
The pressure flowed at the cooling water 10 and the multiple nozzle 11 of the multiple nozzle 11.
The discharge air 2b-c that the discharge air 2b-c left from washer 28 setting value depends on leaving is recycled into
The drying process 1 entered.But the discharge air 2b-c left moisture needs are sufficiently low, to hold with free vapor
Amount.The maximum of the range of set value of the discharge air 2b-c left from washer 28 temperature preferably includes 35 DEG C, Yi Jicong
It is every that the maximum of the range of set value of the moisture for the discharge air 2b-c that washer 28 leaves preferably includes 35 grams of vapor
Kg air.
In addition, the suitable range of set value of the discharge air 2b-c left from washer 28 temperature can include 25-
35 DEG C, and the suitable range of set value of the discharge air 2b-c left from washer 28 moisture can include 20-
35 grams of vapor are per kg air, and preferably 25-30 grams of vapor is per kg air.Arrangement also includes being based on comparing result, for controlling
The device of the pressure flowed at the cooling water 10 and the multiple nozzle 11 of the multiple nozzle 11.Control device 16 can subtract
Less or increase flows to the cooling water 10 of the multiple nozzle 11 and decreases or increases pressure at the multiple nozzle 11.Can be with
Flow to the cooling water 10 of the multiple nozzle 11 and described more with pump 17 or valve (or with such as adjustable nozzles)
The control of pressure at individual nozzle 11.
In Fig. 1, washer 28 is included with 3 superposed vertical direction y successive module 18a-c.Module 18 includes
The multiple spreader nozzles 11 of the one row drop 9 of cooling water 10 (be used for inject), mass transfer area 19a-c (wherein, discharge air 2a with
The drop 9 of cooling water 10 collides), liquid drop separator 20a-c (is used to drop is separated with discharge air 2), and water-collecting tray
21a-c (is used to collect the drop from liquid drop separator 20a-c separation).Mass transfer area is produced in the lower section of the multiple nozzles 11 of every row
19a-c.Liquid drop separator 20a-c and water-collecting tray 21a-c is arranged in the top of the multiple nozzle 11, because discharge air stream 2a
Moved up with vertical direction y.In a washer, the quantity of module is preferably 2-5.In some cases, if filled with
If reduction needed for the discharge air 2a of moisture moisture and temperature is small, then a module 18a-c can be used only.
In method so that the drop 9 of cooling water 10 is injected into mass transfer area caused by the multiple lower sections of nozzle 11 of a row
19a-c, and as the discharge air stream 2a drops moved up separate in liquid drop separator 20a-c, and drop separation
Device 20a-c drainings are to water-collecting tray 21a-c.Liquid drop separator 20a-c is arranged in water-collecting tray 21a-c top, and can also be wrapped
Include the shape for producing falling liquid film from the drop of separation.
Arrangement may also include the device of the size of the drop 22 for controlling the cooling water 10 in each module 18a-c.Liquid
Drop 9 is commonly described as their perceived size, i.e. diameter.It can be entered with pump 17 and tank 27 (or with such as adjustable nozzles)
The control of row drop size.
In method, the size of the drop 9 of cooling water 10 can be controlled.By controlling the pressure at the multiple nozzles 11 of a row
To control the size of the drop 9 of cooling water 10, and the control of the size of drop 9 is dividually carried out for each module 18a-c.
Preferably, the size of drop 9 is minimum at the multiple nozzle 11 positioned at the base section 6 of shell 5, to be sprayed towards higher position
The vertical y increases of mouth, it is maximum at the multiple nozzle 11 of the top section 13 of shell 5.
In Fig. 1, the multiple nozzle 11 being first fed to cooling water 10 in the top section 13 of shell 5, i.e. charging
To the module 18c of vertically uppermost position.Then, subsequent module 18a-b with vertical descending order use from front module 18c collect
Cooling water 10.The cooling water 10 that this kind of design to use in washer 28 minimizes.But other designs are also feasible
's.If for example, moisture of the temperature of cooling water 10 compared to the required discharge air stream 2b-c for leaving washer 28
If being height with temperature value, then the possible the first two module 18b-c for needing offer to be pointed to extreme higher position is provided initial in its
The cooling water 10 of temperature.
In order to strengthen discharge air 2a moisture removal, washer 28 can include at least two liquid drop separator 20a-c,
And that liquid drop separator 20c of the vertical upper installation in y directions is connected with flowing cooling medium, for providing point of cooling
From device surface.Method and then can include cools down the step of vertical upper liquid drop separator 20c with flowing cooling medium,
For providing the separator surface of cooling.
Arrangement includes being used at least partly follow the discharge air stream 2b-c through drying and cooling down for leaving washer 28 again
Ring to drying process 1 device 29, wherein, in drying process 1, by moisture from product be removed into through dry and cool down
Air stream 2b is discharged, produces the discharge air stream 2a full of moisture for being directed to washer 28.For the dress recycled
Such as pipeline and air blower can be included by putting 29.
Cooling water 10 can include raw water.In washer 28, used cooling water can then be used in back tender
The production process for the product being dried in skill 1.This arrangement reduces the energy consumption of the factory including drying process, because from discharge
The vapor of air stream reduces obtained heat and has been transferred to cooling water 10.
In many geographical position, when winter, the temperature of raw water is low.The temperature of low cooling water 10 enhances
The moisture removal of discharge air 2a in washer 28.This is favourable, because at the same time, it is seen that vapor plume production
Raw possibility uprises, if discharge air 2a is discharged into air.
Preferably, cooling water 10 is filtered, it is the multiple to avoid to reduce the amount of wherein possible solid particle
The obstruction of nozzle 11.Cooling water 10 in washer 28 can include water soluble substance and the aqueous solution, for example, caustic liquid
Sodium.In addition, it can include the chemicals of the surface tension for reducing water.Can be with for the method that is recycled to air
Comprise the following steps：Cooling water 10 is filtered, and chemicals is added to cooling water 10, for reducing cooling water 10
Surface tension.
When cooling water 10 flows downward in washer 28, the temperature increase of cooling water 10.Left from washer bottom 6
Cooling water 10 temperature preferably than the temperature of the discharge air stream 2a full of moisture at the entrance 7 on the bottom 6 of washer 28
Spend low 2-3 DEG C.The bottom 6 of washer 28 includes being used for the outlet 23 that cooling water 10 is discharged from washer 28.
Fig. 2 shows the arrangement recycled with multistage heat recovery system 24 in drying process 1 to air.By Fig. 1
Arrangement be connected with the 3 heat recovery heat exchanger 25a-c three stage heat recovery systems 24 for including being sequentially arranged.Recuperation of heat heat
Exchanger 25a-c is equipped with washer 26a-c, is cleaned for batch of material.
In the first stage in heat recovery heat exchanger 25a, the discharge air 2a full of moisture transfers heat to back tender
The intake air of skill, i.e. be transferred to the discharge air 2b through drying and cooling down flowed out from device 3.In fig. 2, device 3 includes
Washer 28.In second and the 3rd in heat recovery heat exchanger 25b and 25c, the discharge air 2a full of moisture is by heat transmission
To other flow medias.The discharge air 2a that will be filled with moisture is directed to device 3 from multistage heat recovery system 24, such as washs
Device 28.
In fig. 2, the discharge air 2b through drying and cooling down of separating device 3 (such as washer 28) flows into pending add
The heat recovery exchanger 25a of heat, is recycled into drying process 1 afterwards.
Arrangement may include two or more devices 3 arranged in parallel, and the air for increasing drying process 1, which recycles, to be held
Amount.When several devices 3 are to be arranged in parallel, it is preferable that the discharge air 2b-c left from each device 3 the basic phase of setting value
Together.Then the discharge air stream 2a full of moisture of self-desiccation in future technique 1 be directed to parallel arrangement two or more
Device 3.
In the arrangement comprising washer, discharge air 2a-c that the yardstick of washer 28 depends on leaving come from again
The drying process 1 being recycled into, and the available coolant water temperature of drying and the cooling depending on the discharge air 2a full of moisture
Degree 10.Determine that the method for yardstick comprises the following steps：Volume flow based on the discharge air 2a full of moisture and pass through washing
The discharge air 2a full of moisture of device 28 speed, to determine scrubbing tower diameter；Based on discharge air 2a in entrance and exit
The molar fraction at place and the residence time based on the discharge air 2a needed for the flowing of drop 9, to determine dehumidification and cooling institute
The module 18a-c needed quantity and height；The flow velocity of quantity based on module 18a-c, cumulative volume gas phase mass transfer coefficient and gas phase
To calculate the cumulative volume of sprinkling section.
Using the arrangement and method for being recycled, the discharge air full of moisture can include drying process
Recycled in factory, without being discharged to air.Most recycling discharge air can weigh in drying process
It is multiple to utilize.Which increase system effectiveness and energy is saved.Air can be avoided to discharge and formed the plume of vapor.
It will be apparent for a person skilled in the art that with the development of science and technology, the basic concept of the present invention can be with each
Kind mode is implemented.The present invention and embodiments thereof are not limited to the described above embodiment, but can be in the scope of claims
Interior change.
List of parts：1 drying process, 2a-c discharge air streams, 3 devices, 4 basal surfaces, 5 shells, 6 base sections, 7 entrances are opened
Mouthful, 8 air blowers, 9 drops, 10 cooling waters, individual nozzle more than 11,12 outlets, 13 top sections, 14 temperature for measuring air stream
With the device of moisture, 15 contrast devices, 16 control devices, 17 pumps, 18a-c modules, 19a-c mass transfer areas, 20a-c drops
Separator, 21a-c water-collecting trays, 22 drop size control devices, 23 exhaust outlets, 24 heat recovery systems, 25a-c heat exchangers,
26a-c washers, 27 tanks, 28 washers, 29 EGRs；
Y vertical direction.
Claims (11)
1. a kind of method for being recycled to the air in drying process, wherein, in the drying process (1), from
Product removes moisture removal air inlet stream, produces discharge air stream (2a), it is characterised in that the discharge air stream (2a) is directed to
To device (3), wherein, reduce the moisture of the discharge air stream (2a), and the discharge of described device (3) will be left
Air stream (2b-c) is at least divided into：It is recycled to the air stream (2b) of the drying process (1) and reaches and the drying process
(1) air stream (2c) of related at least one room.
2. the method as described in claim 1, it is characterised in that be divided into the air stream up to the drying process (1)
(2b) accounts for the 65-85% for the discharge air stream (2b-c) left, and is divided into up to related extremely to the drying process (1)
The air stream (2c) of a few room accounts for the 35-15% for the discharge air stream (2b-c) left.
3. such as the method any one of claim 1-2, it is characterised in that methods described also includes with by separated discharge
The step of air stream (2c) pair at least one room related to the drying process (1) is heated, cooled down or divulged information.
4. such as the method any one of claim 1-3, it is characterised in that methods described is additionally included at least one heat and returned
The step of being heated in receipts heat exchanger (25a-c) to the discharge air stream (2b) left from described device (3), afterwards by institute
State discharge air stream (2b) and be recycled to the drying process (1).
5. method as claimed in claim 4, it is characterised in that methods described is also included the air stream (2a) of discharging from institute
The step of drying process (1) is directed at least one heat recovery heat exchanger (25a-c) is stated, afterwards by the discharge air
Stream (2a) is directed to described device (3).
6. such as the method any one of claim 1-5, it is characterised in that in the process, from the back tender
The discharge air stream (2a) of skill (1) is directed to two or more devices arranged in parallel (3).
7. such as the method any one of claim 1-6, it is characterised in that the drying process (1) includes continuous high-energy
Drying process is consumed, wherein, caused discharge air stream (2a) includes 130-160 grams of vapor per kg air.
8. such as the method any one of claim 1-7, it is characterised in that the discharge air stream (2a) is oriented to
Including being pressurizeed with least one air blower (8) to the discharge air stream (2a).
9. such as the method any one of claim 1-8, it is characterised in that described device (3) includes washer (28).
10. a kind of arrangement for being recycled to the air in drying process, the arrangement includes coming from drying process (1)
Discharge air stream (2a), it is characterised in that the arrangement includes：For reducing the moisture of the discharge air stream (2a)
Device (3), and it is described arrangement include：For the discharge air stream (2b-c) for leaving described device (3) to be at least divided into again
It is recycled to the air stream (2b) of the drying process (1) and reaches the sky of at least one room related to the drying process (1)
The device of air-flow (2c).
11. arrangement as claimed in claim 10, it is characterised in that described device (3) includes washer (28).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20165617 | 2016-08-18 | ||
| FI20165617A FI128437B (en) | 2016-08-18 | 2016-08-18 | A method and an arrangement for recirculating air in a drying process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107764035A true CN107764035A (en) | 2018-03-06 |
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| CN201610770977.0A Pending CN107764035A (en) | 2016-08-18 | 2016-08-30 | For the method and arrangement recycled to the air in drying process |
| CN201710712734.6A Active CN107764037B (en) | 2016-08-18 | 2017-08-18 | Method and arrangement for recycling air in a drying process |
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| CN201710712734.6A Active CN107764037B (en) | 2016-08-18 | 2017-08-18 | Method and arrangement for recycling air in a drying process |
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| CN (2) | CN107764035A (en) |
| DE (1) | DE112017004101B4 (en) |
| FI (1) | FI128437B (en) |
| WO (1) | WO2018033665A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058329A (en) * | 2018-10-17 | 2020-04-24 | 迪蔼姆芬兰有限公司 | Air recirculation system and method for a dryer section of a board or paper machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110500877B (en) * | 2018-05-17 | 2021-07-13 | 迪蔼姆芬兰有限公司 | Structure and method for regulating humid exhaust gas |
| DE102021101998A1 (en) | 2021-01-28 | 2022-07-28 | Voith Patent Gmbh | Process for de-steaming of process exhaust air |
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2017
- 2017-08-18 DE DE112017004101.5T patent/DE112017004101B4/en active Active
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| EP1012516A1 (en) * | 1998-06-11 | 2000-06-28 | Universal Dynamics, Inc. | Method and apparatus for drying granular solids with venturi powered gas circulation |
| CN1369050A (en) * | 1998-12-12 | 2002-09-11 | 新加坡国立大学 | Modular heat pump system for drying and air-conditioning |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE112017004101T5 (en) | 2019-05-02 |
| CN107764037B (en) | 2020-10-30 |
| WO2018033665A1 (en) | 2018-02-22 |
| DE112017004101B4 (en) | 2024-02-15 |
| CN107764037A (en) | 2018-03-06 |
| FI128437B (en) | 2020-05-15 |
| FI20165617A (en) | 2018-02-19 |
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