阅读说明：本技术 使用可调整的调节空气流的干燥器 (Use the adjustable drier for adjusting air stream ) 是由 J.罗西 S.J.安德森 R.马古恩 于 2014-03-17 设计创作，主要内容包括：公开了一种使用可调整的调节空气流的多室干燥器。根据一个实施例,一种装置包括干燥带以及与干燥带的第二表面接触的热介质,该干燥带配置成在干燥带的第一表面上接收待干燥的产品。热介质配置成加热产品,且保持在预定温度。该装置还包括歧管,其定位在干燥带上方,其中歧管包括一个或多个孔口,其使调节空气横向越过干燥带的宽度喷射以从产品移除蒸发的水。(It discloses a kind of using the adjustable multi-chamber drier for adjusting air stream.According to one embodiment, a kind of device includes dry zone and the thermal medium that contacts with the second surface of dry zone, which is configured to receive product to be dried on the first surface of dry zone.Thermal medium is configured to heating product, and is maintained at predetermined temperature.The device further includes manifold, is located in above dry zone, and wherein manifold includes one or more apertures, and adjusting air is made to traverse across the width injection of dry zone to remove the water of evaporation from product.)

1. a kind of device, comprising:

Mobile dry zone, is configured to receive product to be dried on the first surface of the mobile dry zone；

Manifold is located in above the mobile dry zone, wherein the manifold includes one or more apertures, it is one or Multiple apertures make to adjust the width injection that air traverses across the mobile dry zone；

One or more sieves below one or more of apertures, extend beyond the edge of the mobile dry zone with from One or more of aperture guide adjustment air streams；

Multiple hothouses, the mobile dry zone move through the multiple hothouse, wherein the multiple hothouse have with The water of the second surface contact of the mobile dry zone is to heat the product, and wherein the multiple hothouse has independently The water temperature of control；And

Sliding sieve, can be used for adjusting air stream by partially or even wholly covering one or more of apertures.

2. the apparatus according to claim 1, which is characterized in that the manifold is parallel to the length of the mobile dry zone, And wherein the manifold adjacent to the first side of the mobile dry zone.

3. the apparatus according to claim 1, which is characterized in that described device further includes cooler, solid absorbent and pressure One or more of contracting machine is to dehumidification and the offer adjusting air.

4. device according to claim 3, which is characterized in that described device further includes particulate air filter to filter It states humid air and the adjusting air is provided.

5. the apparatus of claim 2, which is characterized in that described device further includes one or more that discharge adjusts air A pipeline, wherein one or more of pipelines are parallel to the length of the mobile dry zone and adjacent to the mobile dry zone Second side.

6. the apparatus according to claim 1, which is characterized in that described device further includes lid, the lid covering and offer institute State the adjustable head space above mobile dry zone, wherein the manifold be located in it is described lid with the mobile dry zone it Between.

7. device according to claim 6, which is characterized in that described device further includes in the lid and the mobile drying One or more hothouses between band, wherein each hothouse in one or more of hothouses provides independent control One or more of air velocity, the humidity of independent control and air themperature of independent control.

8. device according to claim 7, which is characterized in that one or more of hothouses include the first hothouse and Secondary drying chamber, wherein first hothouse than the secondary drying chamber closer to the entrance of the mobile dry zone, and its Middle air velocity is higher than in the secondary drying chamber in first hothouse.

9. device according to claim 6, which is characterized in that the lid includes multi wall polycarbonate panel.

10. the apparatus according to claim 1, which is characterized in that one or more of apertures provide the tune of the injection The first surface of the incidence angle of section air, the incidence angle and the mobile dry zone is at least 40 degree.

11. the apparatus according to claim 1, which is characterized in that class of one or more of apertures based on the product One or more of type, the water capacity of the product and drier construction are under one or more desired pressures and with desired Air capacity sprays the adjusting air.

12. a kind of method, comprising:

Product to be dried is placed on the first surface of mobile dry zone；

The dry product and product is being transported through multiple hothouses on the mobile dry zone；

The second surface of the mobile dry zone is set to contact with water and heat the product；

Independently control the water temperature of the multiple hothouse；And

Make to adjust air by one or more apertures in manifold and across one below one or more of apertures It is a or it is multiple sieve and transversely across the width of the mobile dry zone spray with from dry products remove evaporation water, described one A or multiple sieves extend beyond the edge of the mobile dry zone；

Wherein, sliding sieve can be used for adjusting air stream by partially or even wholly covering one or more of apertures.

13. according to the method for claim 12, which is characterized in that the method also includes by by dehumidification, heating The air to dry provides adjusting air with one or more of air of the heating is filtered.

14. according to the method for claim 13, which is characterized in that be based on dehumidification to use cooler, solid absorption One or more of agent and compressor.

15. according to the method for claim 13, which is characterized in that the air for filtering the heating is based on using Particulate Air Filter.

16. according to the method for claim 12, which is characterized in that the method also includes using one or more pipelines to arrange The air of the injection out, wherein one or more of pipelines are parallel to the length of the mobile dry zone and the neighbouring shifting The side of dynamic dry zone.

17. according to the method for claim 12, which is characterized in that the method also includes adjustment lids and the mobile drying Band between head space with control the injection adjusting air amount.

18. according to the method for claim 17, which is characterized in that the method also includes in each hothouse independently One or more of air velocity, humidity and the air themperature of the adjusting air of the injection are controlled, wherein the multiple dry Dry room is in the lid and the mobile dry zone.

19. according to the method for claim 18, which is characterized in that control the air velocity packet of the adjusting air of the injection It includes and one or more of opens aperture, closes the aperture and change the openings of sizes in the aperture.

20. according to the method for claim 19, which is characterized in that the air velocity of the adjusting air of the injection is first It is higher than in secondary drying chamber in hothouse, wherein first hothouse is than the secondary drying chamber from the mobile drying The entrance of band is closer.

21. according to the method for claim 12, which is characterized in that empty the method also includes providing the adjusting of the injection Gas passes through the incidence angle in one or more of apertures, and the first surface of the incidence angle and the mobile dry zone is at extremely It is 40 degree few.

22. according to the method for claim 12, which is characterized in that the method also includes based on the product type, One or more of water capacity and drier construction of the product is under one or more desired pressures and with desired sky Tolerance sprays the adjusting air.

Summary of the invention

It discloses a kind of using the adjustable multi-chamber drier for adjusting air stream.According to one embodiment, a kind of device Including dry zone and the thermal medium contacted with the second surface of dry zone, which is configured to the first surface in dry zone It is upper to receive product to be dried.Thermal medium is configured to heating product, and is maintained at predetermined temperature.The device further includes manifold, It is located in above dry zone, wherein manifold includes one or more apertures, and aperture makes to adjust the width that air traverses across dry zone Degree injection is to remove the water evaporated from product.

The above and other preferred feature of various novel details and element combination including embodiment is now with reference to attached Figure is more specifically described and points out in the claims.It is understood that particular system as described herein and method only pass through Diagram display and without limitation.As will be appreciated by one skilled in the art, the principles described herein and feature be not Disengaging can be used scope of the present disclosure in the case where in various and many embodiments.

The attached drawing for being included as a part of this specification shows the various embodiments of presently disclosed system and method, And together with the detailed description of general description given above and embodiments given below for illustrating and instructing as described herein Principle.

Fig. 1 shows the section view of the Exemplary dryer using high-pressure manifold according to one embodiment.

Fig. 2 shows regarded according to the enlarged partial cross-sectional of the Exemplary dryer using high-pressure manifold of one embodiment Figure.

Fig. 3 shows the top view of the Exemplary dryer according to one embodiment.

Fig. 4 shows the section view of the Exemplary dryer using low pressure manifold according to one embodiment.

Fig. 5 is shown to be regarded according to the enlarged partial cross-sectional of the Exemplary dryer using low pressure manifold of one embodiment Figure.

Fig. 6 shows the side view of the Exemplary dryer according to one embodiment.

Fig. 7 shows another side view of the Exemplary dryer according to one embodiment.

Fig. 8 shows the example process for dry products according to one embodiment.

It should be noted that the drawings are not necessarily drawn to scale, and similar structures or the element of function are generally by similar Reference label indicate with for run through attached drawing schematic purpose.Attached drawing is intended merely to describe various implementations as described herein Example.Attached drawing does not describe each aspect of teaching content disclosed herein, and does not limit the scope of the claims.

Detailed description

It discloses a kind of using the adjustable multi-chamber drier for adjusting air stream.According to one embodiment, a kind of device includes Dry zone and the thermal medium contacted with the second surface of dry zone, the dry zone are configured to connect on the first surface of dry zone Receive product to be dried.Thermal medium is configured to heating product, and is maintained at predetermined temperature.The device further includes manifold, positioning Above dry zone, wherein manifold includes one or more apertures, and aperture makes to adjust the width spray that air traverses across dry zone It penetrates to remove the water of evaporation from product.

Items in feature and teaching content disclosed herein can be used alone or together with other feature and teaching content The adjustable multi-chamber drier for adjusting air stream is used using to provide.Have been described in greater detail with reference to the accompanying drawings individually and In combination using many typical cases in these additional features and teaching content.The detailed description is intended merely to this field Technical staff instructs more details to implement the aspect of this teaching content, and is not intended to limit the scope of the claims.Therefore, should The combination of features described above in detailed description in a broad sense for implement teaching content may not be required, but only instruct with The specific typical case of this teaching content is described.

In the following description, only for the purpose of explaination, specific term is proposed to provide the thorough of present disclosure Understand.However, those skilled in the art will be clear that, these specific details are not that the training centre of implementation present disclosure must It needs.

According to one embodiment, this drying system traverses across the surface of product by suitably guide adjustment air to do It is dry to be placed in the continuous drying liquid or slurry products taken.This drying system includes a series of air distribution of guide adjustment air Manifold, and improve the device of feeding and the removal of product.In one embodiment, pressure-air is distributed by aperture along dry The length optimization drying process of dry device.In another embodiment, low-pressure air by adjustable notch or air knife distribution with Control the drying condition of the length along drier.

According to one embodiment, this drying system is dry to increase by adjusting air to the dehumidification in drier Dry rate and the air requirements for reducing drier.This drying system controls humidity, temperature and the speed of adjusted air to allow to do Dry device ensures consistent product quality.According to one embodiment, supplies to the air of drier and dried and filtered to meet food Product classification standard or the drug standards.Reduced for drying required air capacity by using low profile drier, therefore simplified Subsystem is discharged in the air intake subsystem and air of this drying system, while reducing machine cost.This drying system is in sky Dry zone trapping discharge air is crossed on the opposite side of gas distributing manifold, and it is discharged from drier.

This drying system increases and improves the drier throughput under steady state operation.This drying system is by providing dry zone On the very fast water removal of product surface improve hot transmitting, used and simplified and more cheap air treatment system, and with more one The drying feature of cause improves the quality of dry products.

The description of general drier operation

According to one embodiment, this drier includes a series of of the water temperature with independent control, air rate, humidity and temperature Hothouse.When the product to be dried on dry zone enters the first Room of this drier, product temperature is initially increased, and water steams Hair several seconds after product enters this drier start.This drying system adjusts the air stream in the first hothouse, to allow Product temperature reaches the preferred temperature for evaporation, and removes the Free water for being easy to evaporate from product.Product is (for example, natural produce Product) eucaryotic cell structure in the evaporation of combination water need most of drying time of product.

According to one embodiment, this drier may include one or more subsequent hothouses, than the first Room from drying The entrance of band is farther.According to one embodiment, secondary drying chamber is usually using relative to the lower air stream in the first Room.This reduces It adjusts the air velocity of air and increases product temperature.At this point, most of free water evaporation from product.It produces Combination water and cell moisture in product need the more time to pass through cell wall.The air stream of reduction provides higher interiors of products temperature Degree and higher steam pressure.This drying system allows product enough relative to the natural tendency generation that vapor passes through is resisted Steam pressure.

This drying system includes mobile dry zone, floats on or floats on the pond of heating water (for example, 60 DEG C to 100 ℃).In one embodiment, dry zone can float on the pond of heat transfer fluid (for example, for reaching 125 DEG C of application).This Liquid or slurry products are applied to dry zone as liquid lamella (for example, it is thick to be less than 5mm) by drying system.Heat is by from circulation Heating water (or heat transfer fluid) be directly conducted to product via the dry zone of polymer membrane and passed with evaporating water from product It passs.Heating water or heat transfer fluid are maintained at predetermined temperature to allow the optimum drying of product.According to one embodiment, dry zone No more than 3mm thickness, to ensure the quick transmitting of thermal energy.

Compared to convection current used in traditional drying system, conduction is rapidly and effectively heat transfer pattern.Conduction will Product on dry zone is uniformly heated up to desired evaporating temperature.When the water vapour pressure in product is more than in surrounding air When water vapour pressure, evaporation occurs.

Drier air conditioning

According to one embodiment, this drying system by reduce and control water content (that is, drying) and control air themperature come Adjust air.This allows the operating condition for controlling drier to generate the dry products with the dry feature of consistent high quality, And it is unrelated with the environmental condition around drier.

For product drying evaporation rate by the air above the saturation vapor pressure and product on the surface of product Water vapour pressure between difference determine.Evaporation rate can be by increasing the water vapour pressure in product or reducing above product The combination of water vapour pressure in air or both increases.

According to one embodiment, this drying system reduces the water vapour pressure of drier air.This drying system is to drying The dehumidification contacted in device with the product on dry zone.This drying system, which ensures, continuously removes humid air stream replacement product Evaporation water near surface.This drying system is using going humid air to supplement drier, to keep and control the drying for crossing product The evaporation rate on surface and the length along dry zone.

Relative humidity is related with the water content and air themperature that are present in air.Air keeps the ability of moisture with temperature Increase.When air is heated, relative humidity reduces.According to one embodiment, this drying system is by reducing its relative humidity Or make dehumidification to adjust the air in drier.This passes through the water content reduced in air, the temperature or two for increasing air The combination of person is realized.The combination of the two parameters increases the evaporation rate in drier.Water content in air can be by using One or more reductions below: the cooler of condensed steam (a) is removed；(b) solid absorbent is (for example, silica gel, activated aluminum Soil)；(c) cause the compressor of condensate moisture；And (d) any other standard technique known to those skilled in the art.In One embodiment, the heating of this drying system goes humid air to preferred temperature, and goes humid air to be introduced into drier heating.

Based on National Environmental standard air (40 CFR, the protection of environment, chapters and sections I, the 50th part, 50.3 sections, 1998), surrounding air is limited to the air of 25 DEG C of temperature and 77% relative humidity.Steam vapour amount in air is known as humidity Than, and unit is grams/every kilogram of dry air (g of water_w/kg_da).The humidity ratio of surrounding air is about 18 g_w/kg_da.Root According to one embodiment, this drying system is to the dehumidification into drier humidity ratio is decreased below 10 g_w/kg_da, and Preferably equal to or lower than 5 g_w/kg_da。

According to one embodiment, this drying system removes the air for entering drier by passing air through cooler It is wet, the temperature of air to be decreased below to the temperature of dew point in water condensation and removal.This drying system is by using refrigeration System carrys out cooling air.The vaporization cycle and condensation cycle of refrigeration system are for realizing desired air conditioning.Air is passed through and is changed Hot device is cooling, and heat exchanger is the evaporator of refrigeration system.Condensed water in dew point is removed to reduce the water content in air. Then in the cooling air of the condensation cycle heating of refrigeration system to generate humid air.This drying system then can will heat Go humid air to introduce drier before humid air heated by additional heat source.This drying system can be used respectively from The cold loop and hot loop of evaporator and condenser cools down and reheats air.

According to another embodiment, this drying system is by using solid absorbent (for example, silica gel, activated alumina) pair Into the dehumidification of drier.Silica gel can be used in this drying system, because it is easily by heating come backheat.This drying system System passes air through the room of silica gel.Usually using the silica gel of smaller particle size, because it is deposited due to higher surface area in trapping It is that the vapor to get into the air aspect is more effective.In one embodiment, this drying system uses 20 to 40 screen sizes Silica gel.Air in environment temperature passes through silica gel and dries.This drying system can also go humid air to introduce what will be heated Humid air will be gone to be further heated to preferred temperature using heat source before drier.In the dry zone for going humid air to pass through drier Later, humid air is discharged drier.According to one embodiment, this drying system is pre- by using the discharge air under high temperature First heating air makes silica gel backheat improve energy efficiency.This drying system can also by external heat source (for example, steam) come Make silica gel backheat.

According to one embodiment, dehumidification of this drying system by using air compressor to drier is entered.It is empty The moisture holding capacity of gas increases with pressure and is reduced.During compressing circulation, the water in compressed air is more than saturation point, condenses out work For condensate, and then removed from compressor.In one embodiment, this drying system is compressed air to greater than 1 bar's Pressure, preferably more than 5 bar, and more preferably it is compressed to the pressure of 6 to 8 bar.When the system respectively by air compression and When being heated to 8 bar and 36 DEG C, the humidity ratio of air is from 18 g_w/kg_daIt is decreased to about 4.6 g_w/kg_da.In the case, it presses The contracting saturation of the air (that is, relative humidity is 100%), and the vapor for being higher than dew point is condensed into liquid.This drying system keeps compression empty Gas further expands through aperture and pressure reducing valve, and compressed air is made to return to atmospheric pressure at about 28 DEG C.Humidity ratio is kept In 4.6 g_w/kg_da, while relative humidity is decreased to about 20%.This drying system can also go humid air by drying in heating Humid air will be gone to be further heated to desired drying temperature when band.

In addition to reducing the absolute water content in air, the raising of this drying system goes the temperature of humid air to increase saturated water Difference between steam pressure and product water vapour pressure.Humid air is gone to can be heated to about 30 DEG C to 120 DEG C of temperature, and excellent Selection of land is heated approximately at 40 DEG C to 60 DEG C.Absorb the air humidity ratio with higher of the evaporation water discharged from product and from dry Dry device discharge.In one embodiment, this drying system will be by that by dehumidification and then will go humid air to lead back drier again In make be discharged air recycling.

According to one embodiment, this drying system is also by making air pass through efficient at least 99.97% filter efficiency Grain air filter (HEPA) further adjusts humid air.Purification and the air adjusted meet 8 grades of specifications of ISO, and are applicable in It is used in dry sterile product.The drier of this drying system is maintained at slightly higher than peripheral region by using exhaust damper The pressure in domain to prevent pollutant from entering and mix with the adjusting air of purification, thus influences the quality for the dry products completed And ingredient.In one embodiment, the air being discharged from drier is filtered to be discharged to avoid any product from drier Into environment.

Drier air stream

This drying system provides the continuous adjusting air stream for traversing across dry zone, to ensure air far from saturation (less than 50% Relative humidity), therefore maintain to cross the high water evaporation rate of dry zone.The sky on the surface of product is crossed in the optimization of this drying system Air-flow, so that the average water vapour pressure of the air contacted with the surface of product keeps lower.

The adjusting air rate for crossing dry zone is determined based on evaporation rate, target medial humidity rate and relative humidity.When When product is dry along the length of dry zone, evaporation rate variation, and the speed for adjusting air correspondingly changes.Implemented according to one Example, target relative humidity rate are lower than 10 g_w/kg_da, and preferably in 5 g_w/kg_daWith 8 g_w/kg_daBetween.Implemented according to one Example, air velocity is between 0.1m/s and 60m/s, and preferably between 2.0m/s and 10m/s.

According to one embodiment, type, the water capacity of product and/or drier of this drying system based on product to be dried Construction provides at a desired pressure and/or the manifold with desired air capacity.For example, this drying system provide for have compared with The product of high water capacity compares the product with lower water capacity and sprays the manifold for adjusting air under relatively higher pressure.

In another example, the first hothouse for being closer to the entrance of dry zone evaporates most of moisture from product.The One hothouse includes manifold, and the manifold compared to secondary drying chamber is sprayed with elevated pressures and adjusts air, and secondary drying chamber is than the One hothouse is farther from the entrance of dry zone.Secondary drying chamber, which may also include, sprays less amount of adjusting sky compared to the first hothouse The manifold of gas.

According to one embodiment, this drying system provides the adjusting air under desired pressure based on the design of manifold.Example Such as, the manifold with smaller hole mouth, which is sprayed than the manifold with larger aperture with elevated pressures, adjusts air.

According to one embodiment, this drying system is by using high pressure (for example, about 50 pound per square inches (psig)) Manifold or low pressure (for example, being less than 5psig) manifold will adjust air and be introduced into drier.Fig. 1 is shown to be implemented according to one The section view of the Exemplary dryer using high-pressure manifold of example.Drier 100 includes that (it provides lid to polycarbonate cap 101 With the head space of the top of dry zone 104 of drier 100), air 107 will be adjusted be introduced into the compressed air in drier 100 Entrance distributing manifold 102, heat transfer medium 103 and air outlet slit 105.Dry zone 104 floats on 103 top of heat transfer medium.Heat transfer is situated between Matter 103 may include heating the heat transfer fluid of water or other forms as known in the art.Heating water in heat transfer medium 103 or The temperature of other heat transfer fluids is maintained at predetermined temperature.Liquid or slurry products are applied to dry zone 104 by drier 100. Direction of the direction of product stream on dry zone 104 perpendicular to the air stream for adjusting air 107.

Fig. 2 shows regarded according to the enlarged partial cross-sectional of the Exemplary dryer using high-pressure manifold of one embodiment Figure.Drier 200 is the enlarged partial cross-sectional view of drier 100 as shown in Figure 1.Compressed air inlet distributing manifold 102 include the inlet air aperture 201 that will be adjusted air 107 and be discharged into drier 200.Enter although Fig. 2 illustrates only one Mouth air orifices 201, but compressed air inlet distributing manifold 102 may include any number of inlet air aperture.

Fig. 3 shows the top view of the Exemplary dryer according to one embodiment.Drier 300 includes U-shaped region 301, provide the air-inlet manifold 302 that high pressure or low pressure adjusts air, keyway 303, air accessory 304, air baffle 305, Cover support 306 and bracket 307.As shown in Figure 3, the direction of the adjusting air stream from air-inlet manifold 302 perpendicular to The direction of the product to be dried moved on transmission dry zone.

Fig. 4 shows the section view of the Exemplary dryer using low pressure manifold according to one embodiment.Drier 400 include polycarbonate cap 401 (head space of its top of dry zone 404 that lid and drier 400 are provided), air will be adjusted 407 are introduced into low-pressure air entrance distributing manifold 402, heat transfer medium 403 and air outlet slit 405 in drier 400.Dry zone 404 float on 403 top of thermal medium.Thermal medium 403 may include the heat transmitting stream for heating water or other forms as known in the art Body.The temperature of heating water or other heat transfer fluids in thermal medium 403 is maintained at predetermined temperature.Drier 400 by liquid or Slurry products are applied to dry zone 404.The direction of product stream on dry zone 404 is perpendicular to the air stream for adjusting air 407 Direction.

Fig. 5 is shown to be regarded according to the enlarged partial cross-sectional of the Exemplary dryer using low pressure manifold of one embodiment Figure.Drier 500 is the enlarged partial cross-sectional view of drier 400 as shown in Figure 4.Low-pressure air entrance distributing manifold 402 include the inlet air aperture 501 that will be adjusted air 407 and be discharged into drier 500.Enter although Fig. 5 illustrates only one Mouth air orifices 501, but low-pressure air entrance distributing manifold 402 may include any number of inlet air aperture.

According to one embodiment, this drying system is by adjusting the head space above dry zone with lower section at the top of drier To control the air capacity being ejected into drier.Lower head space volume reduces under desired air velocity when per unit Between adjusting needed for air capacity.The reduction of head space is limited by real space needed for transmitting product on dry zone. According to one embodiment, the top of drier above dry zone less than 800mm, and preferably above dry zone 10mm and Between 100mm.According to one embodiment, the top of drier can be equipped with transparent material to allow visibility and sampling.

Fig. 6 shows the side view of the Exemplary dryer component according to one embodiment.Dryer basket 600 includes sky Gas manifold 601, polycarbonate cap 603, is used for barometrical port 604, keyway 605, air baffle 606 at air accessory 602, And U-shaped region 607.

Fig. 7 shows another side view of the Exemplary dryer component according to one embodiment.Dryer basket 700 Including there is the cover support 702 of one or more keyways 701, polycarbonate cap 703, bracket 704, be located at polycarbonate cap Drier 705 and dry zone 706 in 703.Polycarbonate cap 703 includes the polycarbonate panel of multi wall, forms drying A part of device assembly and the top surface for covering dryer basket 700.The edge of polycarbonate cap 703 is by air frame cover support 702 bearings, provide the structure conjoint between the panel support structure in air distribution manifold and product steam discharge side.Poly- carbon Acid esters lid 703 prevents to introduce the entrance of the surrounding air of unexpected pollutant.Polycarbonate cap 703 facilitates control from sky Gas distributing manifold crosses the adjusting air of the dry products on dry zone 706.Pressure according to one embodiment, in drier 705 Power is maintained at the direct draught of pressure at least 16 pas (Pa) of the peripheral region beyond dryer basket 700.

Drier air distribution system

According to one embodiment, pressure-air is introduced into drier by the aperture in common manifold.Referring to Fig. 2, compressed air Entrance distributing manifold 102 includes inlet air aperture 201, by pressure-air between polycarbonate cap 101 and dry zone 104 It is ejected into drier 200.Cross the effective of the air stream of the drying surface of the high-speed air reduction product of dry zone 104 Highly.

Injection air lateral flow from inlet air aperture 201 crosses the drying surface of product.Air rate, humidity Product liquid matrix (for example, low solid concentrates, high solid are starched) can be depended in each manifold by changing hole with temperature Mouthful number and line pressure adjust.

According to one embodiment, adjusts air and pass through the system being connected in the common manifold of the length placement of drier Column aperture is introduced into drier.Common manifold has several variable orifices of control air stream.

In one embodiment, air velocity is by opening and closing aperture and by adjusting the air pressure in manifold To control.The speed and amount for adjusting air can be for each drier room adjustment in drier.It designs in one way in aperture At making can vary in size for opening, this after and control total scale of construction of air stream along any point of the length of drier.

In another embodiment, sliding sieve can be used for adjusting air by partially or even wholly covering aperture point Stream.Airflow pattern is also controllable to the predetermined pattern with predetermined size, shape and the frequency being for good and all fabricated onto manifold Aperture.According to one embodiment, air in manifold can be under the pressure between 10 psi to 150 psi, and preferably 15 Between psi to 60 psi.

According to one embodiment, aperture designs are no sharpened edge.Aperture with sharpened edge tends to generate vortex, It interferes the air stream close to the surface of dry zone, and increases the overall effective height of air stream.Referring to Fig. 2, according to a reality Example is applied, inlet air aperture 201 is designed so that the incidence angle of the air stream on dry zone 104 not less than 40 in one way Degree.According to another embodiment, the range of the incidence angle suitable for efficient drying is between 40 degree and 85 degree, and preferably 60 Between degree and 80 degree.

The jet stream of adjusting air stream from aperture can tend to interfere what is recycled below the position or dry zone of dry zone to add Hot water.By including sieving the position and the heating water that avoid interference dry zone, sieve is placed in aperture lower section and prolongs this drying system Stretch the edge beyond dry zone.The sieve guides the air stream of adjusting from aperture, while preventing from adjusting under air interference dry zone The water of side or the position of dry zone itself.It, can be due to adjusting air if guide adjustment air traverses across product surface The low pressure of stream causes dry zone to increase.The wrong way of excessive air velocity and air stream can cause the liter about dry zone Drop problem.

Moisture is obtained when its width for crossing dry zone reaches outlet side by the adjusting air of aperture injection.According to one Humid air is discharged using pipe-line system in embodiment, this drying system.Several laterals are sprayed along the length of drier in air It penetrates on the opposite side of manifold and originates from.These laterals are connected in main exhaust pipeline, and main exhaust pipeline is connected to centrifugal blower Suction side.Air flow control air door balance at each room crosses the air stream of drier.Air filtration is discharged and passes through at least 5 The filter of micron-scale is discharged into the atmosphere to avoid any product.

The position of the air door in lateral is discharged by the opening degree and air in the aperture in control inlet air manifold It sets, air stream can be made to cross drier and adjusted to desired set-point.Balance blower and air door allow drier relative to atmosphere Pressure is maintained at direct draught slightly.Which ensure that pollutant will not enter drier and the drier air with purification and adjusting Mixing.

According to one embodiment, a series of low of the length placement along drier is passed through along the air stream of the length of drier Pressure pipeline distribution.The air of adjusting crosses product surface from side introducing drier by lateral flow and is expelled to opposite side. Air is delivered to drier from main pipeline, and main pipeline extends along the length of drier.Lateral is in the length along drier It is drawn at several grades from main pipeline.Each pipeline includes one or more air doors of the amount for the air stream that each room is arrived in control.

Before the central tube for being connected to feeding drier, air passes through air handling system to reach desired aqueous Amount and desired air themperature.Air be also filtered through HEPA filter remove pollutant in case its enter drier.

The opposite side of room includes the correspondence discharge line trapped from the humid air of product drying Surface Creation.These discharge pipes Road further includes one or more air control air door of the speed of the air stream of control outflow drier.Discharge air filtration passes through At least filter of 5 micron-scales is discharged into the atmosphere to avoid any product.

By the position of control entrance and the air door being discharged in branch, the speed for crossing the air on dry surface is controllable to Desired set-point.Balance blower and air door allow drier to be maintained at the slightly direct draught to environment.Which ensure that pollutant Drier will not be entered and mixed with purification and the drier air adjusted.

Apply product on dry zone

Surface tension is that fluid molecule is attracted to the measure of cohesive force together, and droplet is caused to be formed on the surface.The cohesion Power depends on the air contacted with liquid or the surface of solids and changes.This drying system is utilized at liquia air surface and liquid Difference between the surface tension of solid interface determines how liquid is attached on dry zone.

According to one embodiment, when drying, which brings back to product, applies side, the vertical component of dry zone is increased, and enters back into Drier, and be introduced into and contacted with the liquid product pond being contained in slot.Slot is against band, so that the direct contact drying of open side Band.Cohesive force between liquid and solid forms the thin product layer on dry zone because its increased before entering drier and Become horizontal.The layer of formation has the uniform thickness for the width for crossing dry zone.

If the cohesive force between fruit product and dry zone is excessive, then product is applied for thick-layer, can negatively affect drying Performance.This drying system is controlled before band enters drier using the limiter under blade or expectation thickness or reduction product is thick Degree.Extra product can equably be spread out by limiter or be removed using blade, so that the gas producing formation of expectation thickness enters drying Device.

According to one embodiment, just before product enters drier, this drying system is by by the pond of liquid product It seals to the top of the horizontal component of dry zone and the weaker attachment with the surface of dry zone is utilized to apply product.Liquid product Pond is maintained in feeding container, extends over the width of dry zone, and bottom side is used as the sealing relative to mobile dry zone.Band Between the flat surface being pressed at bottom and four walls for feeding container.In one embodiment, feeding container by have be equal to or Polymer less than the hardenable index of dry zone is made, with ensure dry zone its by bottom planar surface and feeding container it Between when do not cut or scraped.

By the height of the wall on the downstream side by slot be adjusted to slightly shorter than remaining three side wall come apply product to Dry zone.This allows this drying system that the product of predetermined amount is delivered to dry zone, with scheduled thickness and across dry zone Even width distribution.

According to one embodiment, this drying system extends across dry zone by slowly pouring out product with expected rate To there is the product of weaker flow characteristics and weaker adhesion to be applied to dry belt surface for the weir of width or opening.Dry zone moves Dynamic speed and product is applied to the thickness that the rate on dry zone determines the layer of product.

Product is removed from dry zone

According to one embodiment, product is applied to dry zone by this drying system.Product on dry zone passes through a series of dryings Room is advanced through the length of drier.Recycled below dry zone plus hot water heating product.Evaporation water from product is by more The continuous adjusting air stream for crossing the surface of the dry product taken removes.Dry products are attached to the surface of dry zone.It is dry Product is attached to the cohesive force that the degree taken depends between dry zone and dry products.Although some products weaker adhere to To band, but other adhere to strongly and be difficult to remove.This drying system relative to the direction of mobile dry zone by being applied to The power of angle to remove dry products from dry zone.Removal force applies with crossing the even width of dry zone.

According to one embodiment, this drying system by using the length of (on non-planar contact surfaces) below dry zone circle Or rectangular shaft removes dry products, which has sharpened edge on side.Bar can be by having lower than dry carrying material The polymer of hardenable index be made, in order to avoid scrape dry zone.Rounded edges can be by when applied force be to remove dry products There is no any material significantly deformed to be made.The rigidity on the surface of dry zone is supported to ensure the product experience for crossing whole surface Identical stress, so that uniform power applies along dry zone.Which ensure that dry zone is under the displacement resistance provided by removal force It will not start to slide into the other side from side.In one embodiment, this drying system includes an individual bar or pacifies side by side One group of multiple bar of dress are to cover the width of dry zone.

According to one embodiment, this drying system improves drying by the cooling dry zone of terminal stage in drying process Release of the product from dry zone.The difference of thermal expansion coefficient between dry products and dry zone is destroyed attached between two surfaces Put forth effort.It is cooling to unclamp dry products from dry zone, and dry products is allowed effectively to remove from dry zone.

According to one embodiment, for cool down dry zone and dry products cooling water temperature than dry products and drying The average drying temperature of band is at least 30 DEG C low.Dry zone and dry products can be further cooled to below 30 DEG C by this drying system Temperature, and between preferably 0 DEG C and 10 DEG C.

According to one embodiment, this drying system includes one or more high capacity low pressure fans with by the high humidity of reduction amount Degree air is expelled directly out drier.Fan eliminates the needs of pipeline, and is mounted to fit drier at the wall that outside is constituted Work as orientation.

Fig. 8 shows the example process for dry products according to one embodiment.At 801, this drying system Product to be dried is applied to the entrance of transmission dry zone.At 802, this drying system is maintained at the pond of lower section by circulation In and the heating water that is contacted with dry zone or heat-transfer fluid heat product.At 803, this drying system is by product along dry zone It is directed in the first hothouse of drier.At 804, this drying system provides tune by drying, heating and cross air filtering Save air.At 805, this drying system makes adjusting air traverse across product surface by one or more apertures in manifold Injection.Manifold is located in above dry zone and parallel with the first length of dry zone so that this drying system make to adjust air it is logical Cross the width injection that dry zone is crossed in aperture.

At 806, the air velocity of the adjusting air in this drying system control room.At 807, this drying system is in discrimination The moist adjusting air of opposite side (that is, along second length of the dry zone) discharge of pipe.At 808, the judgement of this drying system is produced Whether the expectation mass dryness fraction of product has been realized.If fruit product reaches desired mass dryness fraction, then at 809, this drying system continues along dry zone Product is directed in the subsequent room of drier.According to one embodiment, the air velocity of subsequent indoor adjusting air The air velocity for adjusting air indoor lower than first.As fruit product has reached desired mass dryness fraction, then at 810, this drying system Dry product is removed from dry zone.According to one embodiment, this drying system is removed by using the bar below dry zone Dry product, wherein bar has the sharpened edge on side, and angled relative to the direction application for moving dry zone Power.

According to one embodiment, the component of this drying system include can be processed by using ordinary food chemicals and with Tap water rinses clean material.These components of this drying system can be removed easily from drier, because they are mounted on Allow on the keyway or stud that are manipulated by user.With being air connected as fast quick-detach type to be easy to for adjusting air distribution manifold Installation and removal.

The above exemplary embodiments be described above with show have disclosed using adjustable adjusting air stream come Implement the various embodiments of multi-chamber drier.Those skilled in the art will expect the various of disclosed exemplary embodiment Modification and remodeling.The theme for being intended to fall within the scope of this disclosure is illustrated in the following claims.