DK142252B - Conditioning method for a spray dryer. - Google Patents

Conditioning method for a spray dryer. Download PDF

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Publication number
DK142252B
DK142252B DK429977AA DK429977A DK142252B DK 142252 B DK142252 B DK 142252B DK 429977A A DK429977A A DK 429977AA DK 429977 A DK429977 A DK 429977A DK 142252 B DK142252 B DK 142252B
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DK
Denmark
Prior art keywords
drying
zone
air
spray dryer
dryer
Prior art date
Application number
DK429977AA
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Danish (da)
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DK429977A (en
DK142252C (en
Inventor
Hans Joachim Bauder
Original Assignee
Escher Wyss Gmbh
Civilingenioer M Gregersen
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Publication of DK429977A publication Critical patent/DK429977A/da
Publication of DK142252B publication Critical patent/DK142252B/en
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Publication of DK142252C publication Critical patent/DK142252C/da

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
    • F26B17/1408—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material
    • F26B17/1416—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material the ducts being half open or perforated and arranged horizontally
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/02—Dehydrating; Subsequent reconstitution
    • A23B7/0205—Dehydrating; Subsequent reconstitution by contact of the material with fluids, e.g. drying gas or extracting liquids
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B9/00—Preservation of edible seeds, e.g. cereals
    • A23B9/08—Drying; Subsequent reconstitution
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/40—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution
    • 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
    • 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
    • F26B23/005—Heating arrangements using waste heat recovered from dryer exhaust gases using a closed cycle heat pump system ; using a heat pipe system
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
    • 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
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
    • Y02P60/85—Food storage or conservation, e.g. cooling or drying
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Sustainable Development (AREA)
  • Nutrition Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Drying Of Solid Materials (AREA)

Description

(11) FREMLÆGGELSESSKRIFT 142252 DANMARK (5i) int. ci.3 f 26 b 17/00 «(21) Ansøgning nr. 4299/77 (22) Indleveret den 29· S ep. 1977 (24) Løbedag 29· 8ep. 1977 (44) Ansøgningen fremlagt og(11) PUBLICATION MANUAL 142252 DENMARK (5i) int. ci.3 f 26 b 17/00 '(21) Application No 4299/77 (22) Filed on 29 · S ep. 1977 (24) Race day 29 · 8pm. 1977 (44) The application presented and

fremlesggelsesskriftet offentliggjort den 29· S ep. I98Othe promissory note published on 29 · S ep. I98O

DIREKTORATET FORDIRECTORATE OF

PATENT-OG VAREMÆRKEVÆSENET <30> Prioritet begaeret fra denPATENT AND TRADE MARKET <30> Priority requested from it

5. okt. 1976, 12566/76, CHOct 5 1976, 12566/76, CH

(71) SULZER-ESCHER WYSS G.M.B.H., Lind.au/Bod.ensee, DE.(71) SULZER-ESCHER WYSS G.M.B.H., Lind.au/Bod.ensee, DE.

(72) Opfinder: Hans Joachim Bauder, Sonnhaldenstrasse 8, 8992 Wasser* burg, DE.(72) Inventor: Hans Joachim Bauder, Sonnhaldenstrasse 8, 8992 Wasser * burg, DE.

(74) Fuldmægtig under sagens behandling:(74) Plenipotentiary in the proceedings:

Civilingeniør M.Gregersen.Civil Engineering M.Gregersen.

(54) Kondit ioner ingsf remgangsmåde til en risletørrer.(54) Conditioning procedure for a spray dryer.

Opfindelsen angår en konditioneringsfremgangsmåde til en risletørrer og af den i patentkravets indledning angivne art.BACKGROUND OF THE INVENTION The present invention relates to a conditioning method for a spray dryer and of the nature specified in the preamble of the claim.

En sådan fremgangsmåde er f. eks. kendt fra beskrivelsen til tysk patentskrift nr. 310 352. Det tilhørende anlæg tjener navnlig til tørring af frugter, levnedsmidler, vasketøj og lignende ting.Such a method is known, for example, from the specification of German Patent Specification No. 310 352. The associated plant serves, in particular, for the drying of fruits, foodstuffs, laundry and the like.

Ved denne kendte fremgangsmåde bliver fugtig, varm luft, der kommer fra tørrezonen, ført i modstrøm med kold og tør luft, der strømmer ud fra fordamperen, før den varme luft strømmer ind i fordamperen, med det formål at bevirke en varmeudveksling mellem den varme luft og den kolde luft. Tørregodset bliver efter stedfunden tørring udtaget direkte af tørrekammeret.In this known method, humid hot air coming from the drying zone is countercurrent with cold and dry air flowing out of the evaporator before the hot air flows into the evaporator, in order to effect a heat exchange between the hot air and the cold air. After drying, the drying material is taken directly from the drying chamber.

I mange tilfælde er det dog nødvendigt yderligere at til- 2 142252 bagekøle tørregodset, og dette gælder navnlig ved risletørrere, der tjener til tørring af kornfrugter, oliefrø og foderpresse-stykker.In many cases, however, it is necessary to further refrigerate the drying goods, and this is especially true for dryers used for drying cereals, oilseeds and feed press pieces.

Grunden til nødvendigheden af denne tilbagekøling lig-5 ger i, at tørregodset forlader tørrezonen med en temperatur, der ved længere påvirkning virker uheldig på tørregodsets kvalitet. Da den naturlige afkølingsproces ved massegods ville vare for længe, kræves der en tilbagekøling efter tørringen.The reason for the necessity of this reflux lies in the fact that the drying material leaves the drying zone at a temperature which, on prolonged exposure, has an adverse effect on the quality of the drying material. Since the natural cooling process for bulk goods would take too long, a reflux after drying is required.

Ved andre udførelsesformer for tørrere er det sædvanligt 10 at foretage en tilbagekøling med yderluft. Herved fås der dog en temperatur af tørregodset, der afhænger af de temperatursvingninger, som følger af årstiderne, men som i almindelighed er mindst 5° C højere end temperaturen af yderluften.In other drier embodiments, it is customary to perform an external air reflux. However, this provides a temperature of the drying material, which depends on the temperature fluctuations that result from the seasons, but which is generally at least 5 ° C higher than the temperature of the external air.

En kvalitetsbevarende lagring af tørregodset er i dette 15 tilfælde navnlig ikke mere sikker under hovedtørringssæsonen (høsttiden).In this case, in particular, a quality-preserving storage of the drying material is not safer during the main drying season (harvest time).

Desuden er det til tørring, navnlig af kornfrugter, fordelagtigt, at tørregodset før sin indledning i den egentlige tørrezone bliver opvarmet så meget, at det kommer til en sved-20 ning, hvorved godset bliver bedre beredt til en tilsluttende fordampning af fugtigheden i godset. Heller ikke til en sådan fortørring af det gods, der skal tørres, er der nævnt midler i det ovennævnte trykskrift.In addition, for drying, especially of cereal fruit, it is advantageous for the drying material to heat up before its introduction into the actual drying zone so as to result in a sweat, thereby preparing the goods better for a subsequent evaporation of the moisture in the goods. Also, no such drying of the goods to be dried is mentioned in the aforementioned printing.

Den foreliggende opfindelse tager sigte på at angive en 25 konditioneringsfremgangsmåde til risletørrere af den omhandlede art, ved hvilken en gennemførelse af de nævnte tre proces-trin er mulig på økonomisk måde.SUMMARY OF THE INVENTION The present invention aims to provide a conditioning method for rice dryers of the kind in which an implementation of said three process steps is economically feasible.

Dette opnås ifølge opfindelsen ved, at man går frem som angivet i patentkravets kendetegnende del.This is achieved according to the invention by proceeding as indicated in the characterizing part of the patent claim.

30 Ved at gå frem på denne måde får man tørreluften ekstra afkølet i kølezonen i risletørreren, og man får tørregodset forvarmet i varmeudveksleren, der gennemstrømmes af kuldemid-deldampen.By proceeding in this way, the drying air is extra cooled in the cooling zone of the dryer, and the drying material is preheated in the heat exchanger, which is flowed through the refrigerant vapor.

Opfindelsen forklares nærmere under henvisning til teg-35 ningen, på hvilken fig. 1 skematisk viser en udførelsesform for risletørreren, ved hvilken opfindelsen udføres, set 3 142252 forfra og tildels i længdesnit med et tilhørende strømningsskema for luftkredsløbet og for det som varmepumpe tjenende kuldekredsløb, og fig. 2 i perspektiv en tagsektion i tørrezonen, idet 5 tilbagekølingszonen er udformet analogt.The invention is further explained with reference to the drawing, in which: FIG. 1 schematically shows an embodiment of the spray dryer in which the invention is carried out, seen from the front and partly in longitudinal section with an associated flow diagram for the air circuit and for the heat pump serving as a heat pump; and FIG. Figure 2 is a perspective view of a roof section in the drying zone, the cooling zone 5 being designed analogously.

Den i fig. 1 viste risletørrer 1 er opdelt i en indløbszone 2 for gods, f.eks. korn, der skal tørres, en forvarmnings-zone 3, en tørrezone 4, en tilbagekølingszone 5 og en udførselszone 6.The FIG. 1, the dryer dryer 1 shown is divided into an inlet zone 2 for goods, e.g. grains to be dried, a preheating zone 3, a drying zone 4, a reflux zone 5 and an export zone 6.

10 I forvarmningszonen 3 er der anbragt en varmeudveksler 7, der er gennemstrømmet af kuldemiddeldamp, medens der i tørrezonen 4 og i tilbagekølingszonen 5 er indbygget rækker af tagelementer 8, der er anbragt over hinanden og forsat i forhold til hinanden, som det vil blive forklaret nærmere neden-15 for i forbindelse med fig. 2.10 In the preheating zone 3 is arranged a heat exchanger 7, which is flowed through refrigerant vapor, while in the drying zone 4 and in the reflux zone 5, rows of roof elements 8 are arranged which are arranged one above the other and as will be explained in relation to each other, as will be explained. more particularly below in connection with FIG. 2nd

Tørrezonen 4 og tilbagekølings zonen 5 er omgivet af hver en hætte henholdsvis 9 og 10. Til disse hætter er der tilsluttet tilløbs- og afløbsstudser henholdsvis 11 og 12 samt 13 og 14 for henholdsvis tørreluften og køleluften. Til udførselszo-20 nen 6 er der tilsluttet en sluse 15 af sædvanlig udførelse til bortførsel af tørregodset fra risletørreren. Slusen er på ikke vist måde forbundet med en fyldestand- og opholdstidstyreind-retning af kendt udførelse.The drying zone 4 and the cooling zone 5 are surrounded by each hood 9 and 10, respectively. To these caps are connected inlet and outlet connectors 11 and 12 and 13 and 14 for the drying air and the cooling air respectively. To the export zone 6, a lock 15 of the usual embodiment is connected to remove the drying material from the drying dryer. The lock is not shown in a way associated with a filling state and dwell time control device of known embodiment.

Kuldekredsløbet, i hvilket der f.eks. cirkulerer R12 25 CCF2C12) eller et andet kuldemiddel, f.eks. R114 (C2C12^4^>^ar en kuldemiddelkompressor 16, en varmeudveksler 7, en kondensator 17, en drøvleventil 18 og en fordamper 19.The cooling circuit in which e.g. circulates R12 (CCF2C12) or another refrigerant, e.g. R114 is a refrigerant compressor 16, a heat exchanger 7, a capacitor 17, a throttle valve 18 and an evaporator 19.

I luftkredsløbet er der anbragt en blæser 20, et støvfilter 21, fordamperen 19, der virker som køler for luften, 30 tilbagekølingszonen 5, kondensatoren 17, i hvilken luften bliver opvarmet, og tørrezonen 4.A fan 20, a dust filter 21, the evaporator 19 acting as a cooler for the air, the reflux zone 5, the condenser 17 in which the air is heated and the drying zone 4 are arranged in the air circuit.

Som det fremgår af fig. 2, er tørrezonen 4 på begge sider omgivet af en hætte 9, til hvilken er tilsluttet en til--strømningsluftstuds 11 og en afgangsstuds 12. I tørrezonen er 35 der på kendt måde anbragt tagelementer 8 i række over hinanden og forsat i forhold til hinanden. Herved har en række af tagelementerne indløbsåbninger 8a, der er åbne hen mod tilførselsluftsiden, medens de overfor liggende sider på tagelementerne er 4 142252 lukkede, og rækker af tagelementer, der er anbragt mellem to sådanne rækker, har åbne udløbsåbninger 8b på afgangsluftsiden, medens åbningerne er lukkede på den overfor liggende side.As shown in FIG. 2, the drying zone 4 is surrounded on both sides by a cap 9, to which is connected a flow air nozzle 11 and an outlet nozzle 12. In the drying zone 35, in the known manner, roof elements 8 are arranged in succession one another and continued relative to each other. . Hereby, a number of the roof elements have inlet openings 8a which are open towards the supply air side, while the opposite sides of the roof elements are closed, and rows of roof elements arranged between two such rows have open outlet openings 8b on the outlet air side, while the openings are closed on the opposite side.

Tørrezonen er over hele tværsnittet fyldt med tørregods 5 22, der over tagelementerne risler ovenfra og nedefter, medens inderrummet under tagelementerne er fri for tørregods og udelukkende bliver gennemstrømmet af tørreluft. Tørreluften strømmer gennem tilførselsluftåbningerne ind i tagelementerne og strømmer om deres flanker opefter, d.v.s. den strømmer gennem 10 tørregodset og indtræder i tagelementerne i de derover anbragte rækker, der har åbninger, som er rettet hen mod afgangsluftsiden, og bliver afsuget gennem hætten 9 ved hjælp af blæseren 20, fig. 1.The drying zone is filled over the entire cross-section with drying material 5 22, which rises above and below the roof elements, while the interior space below the roofing elements is free of drying material and is only flowed through drying air. The drying air flows through the supply air openings into the roof elements and flows around their flanks upwards, i.e. it flows through the drying goods and enters the roof elements in the rows arranged above, having openings directed towards the exhaust air side, and is aspirated through the hood 9 by means of the fan 20; First

Tilbagekølingszonen 5 er udformet analogt med tørrezonen.The reflux zone 5 is designed analogously to the drying zone.

15 Den kontinuerlige drift af det i fig. 1 viste anlæg sker på følgende måde: Tørregods, der er indfyldt i risletørreren 1, f. eks. kornfrugter, opvarmes i forvarmningszonen ved overførsel af varme fra kuldemiddeldampen i kuldemiddelkredsløbet, for at be-20 gunstige en afgivelse af fugtighed i tørrezonen 4. X tilslutning hertil bliver tørregodset i tørrezonen - som beskrevet o-venfor - gennemstrømmet af opvarmet tørreluft.15 The continuous operation of the device shown in FIG. The plants shown in Figure 1 are as follows: Dry goods filled in the rice dryer 1, eg cereals, are heated in the preheating zone by transfer of heat from the refrigerant vapor in the refrigerant circuit, to favor the release of moisture in the drying zone 4. X In addition, the drying material in the drying zone - as described o-friendfor - is flowed by heated drying air.

Tørreluften opvarmes i kondensatoren 17 i kuldemiddelkredsløbet ved varmeudveksling med det kondenserede kuldemid-25 del og indledes i tørrezonen 4. Fra tørrezonen bliver luften tilsuget af blæseren 20, kølet i fordamperen 19 ved varmeudveksling med det fordampede kuldemiddel og ledet ind i tilbagekølingszonen 5. Herfra gennemstrømmer afgangsluften kondensatoren 17, bliver opvarmet og indledes atter i tørrezonen 4 i 30 risletørreren 1.The drying air is heated in the condenser 17 in the refrigerant circuit by heat exchange with the condensed refrigerant 25 and introduced into the drying zone 4. From the drying zone, the air is sucked in by the fan 20, cooled in the evaporator 19 by heat exchange with the evaporated refrigerant and fed back into the cooling zone 5. the exhaust air capacitor 17 is heated and re-started in the drying zone 4 in the drying dryer 1.

I fig. 1 er der på pågældende steder angivet temperaturværdier for luften og for kuldemidlet, som de f.eks. forekommer i en tørringsproces, der udføres i rislekøleren.In FIG. 1, temperature values for the air and for the refrigerant are indicated at the places in question, such as e.g. occurs in a drying process performed in the rice cooler.

Opfindelsen er dog ikke begrænset til den viste udførel-35 sesform for risletørreren, men omfatter f.eks. også sådanne udførelsesformer for risletørrere, ved hvilke der i tørrezonen eller i tilbagekølingszonen ikke er anbragt tagelementer til indledning og bortledning af tørreluften og den kølede luft.However, the invention is not limited to the embodiment of the spray dryer shown, but includes e.g. also such embodiments for spray dryers in which no roofing elements are provided for introducing and venting the drying air and the cooled air in the drying or cooling zone.

DK429977AA 1976-10-05 1977-09-29 Conditioning method for a spray dryer. DK142252B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1256676 1976-10-05
CH1256676A CH609214A5 (en) 1976-10-05 1976-10-05 Gravity drier for free-flowing material, in particular seed kernels

Publications (3)

Publication Number Publication Date
DK429977A DK429977A (en) 1978-04-06
DK142252B true DK142252B (en) 1980-09-29
DK142252C DK142252C (en) 1981-02-23

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Application Number Title Priority Date Filing Date
DK429977AA DK142252B (en) 1976-10-05 1977-09-29 Conditioning method for a spray dryer.

Country Status (6)

Country Link
BE (1) BE859395A (en)
CH (1) CH609214A5 (en)
DE (1) DE2645835C3 (en)
DK (1) DK142252B (en)
FR (1) FR2367260A1 (en)
NL (1) NL7710316A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU183005B (en) * 1981-10-21 1983-12-28 Oktober 6 Mtsz Method and apparatus for energy spare drying of constant output particularly granular products or produces containing surface and fixed moisture
NL8400519A (en) * 1984-02-17 1985-09-16 Keen Egbert APPARATUS WITH FRAME COMPOSITE AND CONNECTORS AND CONNECTOR THEREFOR.
DE19520228A1 (en) * 1995-06-01 1996-12-05 Gimborn Probat Werke Arrangement for roasting bulk plant material, in particular coffee beans
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DK429977A (en) 1978-04-06
DE2645835C3 (en) 1979-04-05
NL7710316A (en) 1978-04-07
FR2367260A1 (en) 1978-05-05
BE859395A (en) 1978-02-01
DE2645835B2 (en) 1978-08-10
DK142252C (en) 1981-02-23
CH609214A5 (en) 1979-02-28
DE2645835A1 (en) 1978-04-06

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