DK167090B1 - The fluidized bed - Google Patents
The fluidized bed Download PDFInfo
- Publication number
- DK167090B1 DK167090B1 DK033376A DK33376A DK167090B1 DK 167090 B1 DK167090 B1 DK 167090B1 DK 033376 A DK033376 A DK 033376A DK 33376 A DK33376 A DK 33376A DK 167090 B1 DK167090 B1 DK 167090B1
- Authority
- DK
- Denmark
- Prior art keywords
- protein
- air
- tube
- vortex
- inflow
- Prior art date
Links
- 102000004169 proteins and genes Human genes 0.000 claims description 31
- 108090000623 proteins and genes Proteins 0.000 claims description 31
- 239000000725 suspension Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 8
- 239000007921 spray Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241000251539 Vertebrata <Metazoa> Species 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- A23B2/00—Preservation of foods or foodstuffs, in general
- A23B2/90—Preservation of foods or foodstuffs, in general by drying or kilning; Subsequent reconstitution
- A23B2/95—Fluidised-bed drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
- F26B3/0926—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by pneumatic means, e.g. spouted beds
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Solid Materials (AREA)
Description
- i - DK 167090 B1- i - DK 167090 B1
Opfindelsen angår et hvirvellagsapparat til tørring af vandige, varmefølsomme proteinsuspensioner, som indsprøjtes ved hjælp af en doseringsindretning, bestående af cylindriske og keglestumpformede afsnit og en indstrømningsbund, som er er udformet skålformet perforeret med 5 en hældningsvinkel.The invention relates to an eddy layer apparatus for drying aqueous, heat-sensitive protein suspensions, which are injected by means of a metering device consisting of cylindrical and cone-shaped sections and an inflow bottom formed in a bowl-shaped perforated angle.
Det er kendt at tørre proteinsuspensioner i sprøjtetørrere, som muliggør en skånsom tørring af et varmefølsomt materiale på grund af den korte opholdstid af de udsprøjtede partikler og indstillingen af køl egrænsetemperaturen ved overfladen. Der kendes endvidere tørrings-10 fremgangsmåder og apparater, ved hvilke man både kan tørre og granulere suspensioner, som ikke er varmefølsomme, hvorhos den varmefølsomme suspension tilføres i hvirvellaget. De derved dannede agglomerater tørres i den til frembringelse af hvi rvel lag nødvendige luftstrøm, hvorved der på grund af de ikke retningsbestemte, turbulente strømninger i hvirvel-15 lagene kan ske lokal overhedning. Der kendes endvidere tørrere, ved hvilke suspensionerne tørres på opvarmede roterende valser.It is known to dry protein suspensions in spray dryers which allow for gentle drying of a heat sensitive material due to the short residence time of the sprayed particles and the setting of the cooling limit temperature at the surface. Also known are drying methods and apparatus by which both dry and granular suspensions which are non-heat sensitive can be applied, to which the heat sensitive suspension is applied in the fluidized bed. The agglomerates thus formed are dried in the air flow necessary to produce each vortex layer, whereby, due to the non-directional, turbulent currents in the vortex layers, local superheating can occur. Dryers are also known in which the suspensions are dried on heated rotary rollers.
På grund af de ringe strømningshastigheder, som må overholdes som følge af den lille partikelstørrelse i sprøjtetørreren, er det en ulempe ved sprøjtetørrerne, at der i overensstemmelse hermed kræves 20 store maskintekniske anlæg med tilsvarende pladsbehov og deraf følgende store investeringsomkostninger. Hvirvel lagsapparater, hvor tørringen og granuleringen sker ved ikke retningsbestemte, turbulente strømninger, tillader ganske vist en højere lufthastighed og et deraf følgende ringere anlægsvolumen, men de er uegnede til tørring af proteinsuspensio-25 ner, da der på grund af de lokale overhedninger optræder betydelige kvalitetsforringelser. Desuden sker der i sådanne apparaturer ved tørringen af vandige proteinsuspensioner et sammenbrud af hvirvel laget som følge af fastklæbning af de enkelte partikler ved hinanden eller ved apparatvæggen. Den lokale overhedning af proteinsuspensioner sker ved 30 den direkte kontakt med valserne også med valsetørere og forårsager store kvalitetstab.Due to the low flow rates that must be observed due to the small particle size of the spray dryer, it is a disadvantage of the spray dryers that 20 large mechanical engineering systems with corresponding space requirements and consequently large investment costs are required. Whirl layer apparatus, where the drying and granulation occurs at non-directional, turbulent flows, allows a higher air velocity and a consequent poorer plant volume, but they are unsuitable for drying protein suspensions because of significant local overheating. quality deterioration. In addition, in such apparatuses, when the aqueous protein suspensions are dried, a swirling of the vortex occurs due to the adherence of the individual particles to each other or to the apparatus wall. The local superheating of protein suspensions occurs by the direct contact with the rollers also with roll dryers and causes large loss of quality.
Fra NO-fremlæggelsesskrift 138.136 kendes et hvirvellagsapparat til tørring og køling af vandige ogvarmeføl somme proteinholdige væsker eller pulvere, hvor bunden er konisk udformet med en given hældnings-35 vinkel, og hvor luften til hvirvellaget tilføres tangetialt til rummet - 2 - DK 167090 B1 under bunden, hvorved det tilsigtes at opnå en vertikal hastighedsfordeling, som er proportional med bundens diameter. Ved dette hvirvellagsapparat er opholdstiden hyppigt utilstrækkelig og en del af de dannede partikler kan forlade hvirvellagsapparatet selv om de ikke har 5 den ønskede kornstørrelse. Endvidere opnås der ikke en optimal hastighedsfordeling langs en diameter i bunden.From NO-Presentation Specification 138.136, an eddy layer apparatus for drying and cooling aqueous and heat foams is known as some proteinaceous liquids or powders, the bottom of which is conically shaped at a given inclination angle and where the air to the vertebral layer is supplied tangentially to the room - 2 - DK 167090 B1 the bottom, thereby achieving a vertical velocity distribution proportional to the bottom diameter. In this fluidized bed apparatus, the residence time is often insufficient and some of the particles formed may leave the fluidized bed apparatus even if they do not have the desired grain size. Furthermore, an optimum velocity distribution along a bottom diameter is not achieved.
Opfindelsen har til formål at tilvejebringe et hvirvel lagsapparat af den indledningsvis angivne art, hvor der sikres en skånsom tørring, en variabel indstilling af materialeopholdstiden i hvirvellaget, og en 10 forbedret produktparameter med valgfri kornstørrelse, valgfri kornstørrelsesområde og indstilling af restfugtighed i proteingranulatet.The invention has for its object to provide a vortex layer apparatus of the kind initially provided, ensuring gentle drying, a variable setting of material retention time in the vortex layer, and an improved product parameter of optional grain size, optional grain size range and residual moisture setting in protein.
Den foreliggende opfindelse er baseret på den opgave at tilvejebringe et hvirvel lagsapparat til fremstilling af tørret protein af vandig suspension med hensigtsmæssigt udformet indstrømningsbund samt i 15 afhængighed deraf frembragte luftstrømme, under indføring af materialet fra oven og til føring af tørregas nede fra til frembringelse af et hvirvel!ag samt samtidig bortledning af proteinet.The present invention is based on the object of providing a vortex layer apparatus for producing dried protein of aqueous suspension with suitably formed inflow bottoms and, in dependence thereof, producing air streams, introducing the material from above, and conducting dry gas from below to produce a swirling ag as well as simultaneous dissipation of the protein.
Ifølge opfindelsen løses denne opgave ved, at hældningsvinklen (a) er mindre end 20°, at hullerne er anbragt således, at der fremkommer et 20 åbningsforhold φ mellem fri hulflade og totalflade, der tiltager kontinuerligt eller trinvist indefra og udad og i midten af indstrømnings-bunden er større end 3% og ved randen er mindre end 25%, og at der neden under den centrale åbning er anbragt et rør, som er udformet til samtidig lufttilførsel og proteinbortledning.According to the invention, this task is solved by the angle of inclination (a) being less than 20 °, that the holes are arranged so as to provide an opening ratio mellem between free hole surface and total surface increasing continuously or incrementally from the inside outwards and in the middle of the inflow. the bottom is greater than 3% and at the rim is less than 25%, and a tube is arranged below the central opening designed for simultaneous air supply and protein dissipation.
25 Ifølge opfindelsen består det i indstrømningsbunden anbragte rør endvidere fortrinsvis af to halvdele, som munder ud i en cellehjulsslu-se, og er forbundet med en højdeindstillelig bøsning.Furthermore, according to the invention, the tubes arranged in the inflow bottom preferably consist of two halves which open into a cell wheel lock and are connected to a height adjustable bush.
Med løsningen ifølge opfindelsen opnås der en ensartet fordeling af luften under bunden til standardisering af strømningsprofilet i 30 hvirvel laget, en fladt hældende eller ikke hældende bund til forøgelse af opholdstiden for proteinmaterialet i hvirvellaget og dermed en mu-liggørelse af en målrettet granulering af proteinet, hvor målet er en forud fast kornstørrelse og fugtighed af proteinet, en forøgelse af åbningsforholdet i bunden fra centrum og udad til understøttelse af et 35 materialekredsløb i hvirvellaget og forbedring af materialeudtagningen, - 3 - DK 167090 B1 nemlig en større hastighed ved yderkanten, en opadrettet materialestrømning, en mindre hastighed ind mod midten, og en afbøjning af materialestrømningen ovenfra og nedad, samt med den opadrettede luftstrømning i udtagningsrøret en kornstørrelsesklassering af det udtrædende 5 protein, idet kun den partikelkornstørrelse, som har en større svæveha-stighed end den opadrettede luftstrømning, kan forlade hvirvel laget, idet målet er et protein med et forud fastsat kornstørrelsesspektrum.With the solution according to the invention, a uniform distribution of the air below the bottom is obtained for standardizing the flow profile in the vortex layer, a flat inclined or non-inclined bottom for increasing the residence time of the protein material in the vertebrate layer and thus enabling a targeted granulation of the protein. wherein the target is a predetermined grain size and humidity of the protein, an increase in the opening ratio at the bottom from the center and outwards to support a material circulation in the vertebral layer and improvement of material extraction, namely a greater velocity at the outer edge, an upward direction material flow, a lower velocity towards the center, and a deflection of the material flow from top to bottom, and with the upward air flow in the take-off tube a grain size classification of the withdrawing protein, only the particle grain size having a higher velocity of flow than the upward flow of air. able to leaving the vortex layer, the target being a protein with a predetermined grain size spectrum.
Dette bevirker, at man på grund af den roterende bevægelse af proteinpartiklerne undgår en lokal overhedning, så at proteinets kvalitet ikke 10 forringes. Desuden opnås der på grund af den høje strømningshastighed af proteinpartiklerne ved randen af hvirvellagsapparatet en selvrensningseffekt, hvorved en fastklæbning af proteinpartikler ved beholdervæggen undgås. Som følge af dannelse af store proteinaggiomerater i hvirvel laget kan luftgennemstrømningen forøges betydeligt uden over-15 skridelse af bortledningshastigheden, hvilket bidrager væsentligt til en volumenmæssigt mindre udformning af hvirvel lagsapparaturet.This means that due to the rotating motion of the protein particles, a local superheat is avoided so that the quality of the protein does not deteriorate. In addition, due to the high flow rate of the protein particles at the edge of the fluidised bed apparatus, a self-cleaning effect is achieved, thereby avoiding an adhesion of protein particles to the vessel wall. Due to the formation of large protein agglomerates in the vortex layer, the air flow can be significantly increased without exceeding the drainage velocity, which contributes significantly to a smaller volume design of the vortex layer apparatus.
Opfindelsen er nærmere forklaret i det følgende under henvisning til tegningen, på hvilken 20 fig. 1 viser et længdesnit af et hvirvel lagsapparatur tillige med hvirvel lagets opbygning og gastilførsel samt agglomeratbortledni ng, fig. 2 et diagram af åbningsforholdet φ mellem den fri hulflade og indstrømningsbundens totale areal, og 25 fig. 3 en bøsning til indstilling af luftens strømningshastig hed tillige med centralt rør med cellehjulssluse.The invention is further explained in the following with reference to the drawing, in which: FIG. 1 shows a longitudinal section of a vortex layer apparatus together with the structure and gas supply of the vortex layer and agglomerate discharge; FIG. 2 is a diagram of the opening ratio φ between the free hole surface and the total area of the inflow bottom; and FIG. 3 shows a sleeve for adjusting the flow rate of the air, as well as a central tube with cell wheel lock.
Små proteinpartikler tilføres ved hjælp af en doseringsindretning fra oven til et cirkulært hvirvel!agsapparatur med cylindrisk eller 30 keglestubformet udformede afsnit. I afhængighed af den ifølge opfindelsen udformede indstrømningsbund 4 hersker der i apparaturet forskellige strømningshastigheder af luften, der former sig som hvirvel lag 3, hvorhos der ved forholdet mellem indstrømningshastighed og bortledningshastighed opnås, at der ikke bordledes proteinpartikler fra hvirvellaget.Small protein particles are supplied by means of a top-down metering device to a circular vortex shaft apparatus having cylindrical or cone-shaped sections. Depending on the inflow bottom 4 formed according to the invention, different flow rates of the air forming as vortex layer 3 prevail in the apparatus, whereby the ratio of inflow velocity to discharge velocity is obtained that no protein particles from the vertebrate layer are obtained.
35 Som følge af hvirvellaget 31 s klasserende virkning opnås, at de mindste - 4 - DK 167090 B1 proteinpartikler danner det øverste lag af hvirvel laget og fortrinsvis oversprøjtes fra dysen 2's sprøjtekegle. De fugtede proteinpartikler falder tilbage i hvirvellaget og tørres direkte over indstrømningsbunden 4 ved hjælp af den indtrædende varmluft samt føres atter i radial 5 retning udad og ved randen af hvirvel laget 3 opad som følge af den højere hastighed. For herunder at sikre et stabilt hvirvel!ag 3 må strømningshastigheden af luften i centrum være større end hvirvel punkthastigheden af de store proteinpartikler. Som følge af hvirvel laget 3's klasserende virkning, hældningen α af indstrømningsbunden 4 og den i 10 afhængighed af indstrømningsbunden 4's radius r indad aftagende hastighed kommer der fortrinsvis store proteinpartikler ind ved midten af indstrømningsbunden 4, hvor der er anbragt et centralt rør 5, gennem hvilket der strømmer luft med forskellig temperatur og med en ved hjælp af bøsningen 10 regulerbar strømningshastighed. Da proteinpartiklernes 15 faldhastighed i røret 5 ved konstant strømningshastighed af luften er en funktion af parti keldiametren, synker alle proteinpartikler, som opnår en bestemt diameter, nedad i røret 5 og træder gennem en celle-hjulssluse 6 ud fra hvirvel!agsapparatet. Alle mindre proteinpartikler gribes af den i røret 5 værende luftstrømning og transporteres tilbage 20 til hvirvel laget. Den tilførte luft 9 over indstrømningsbunden 4 kan have samme temperatur som luften 8 i det centrale rør 5, men bør ikke overskride 200°C, evt. kan luften 8 være kold, således at der i røret 5 sker en afkøling af proteinerne.Due to the grading effect of the fluidized bed 31, it is obtained that the smallest particles of protein form the upper layer of the fluidized bed and are preferably sprayed from the spray cone of the nozzle 2. The wetted protein particles fall back into the vortex layer and are dried directly over the inflow bottom 4 by means of the incoming hot air and are again directed in the radial 5 direction outward and at the edge of the vortex layer 3 upward due to the higher velocity. In order to ensure a stable vortex ag 3 including the flow velocity of the air in the center must be greater than the vortex point velocity of the large protein particles. Due to the grading effect of the vortex layer 3, the slope α of the inflow bottom 4 and the inward decreasing speed of the inflow bottom 4, preferably large protein particles enter the center of the inflow bottom 4, through which a central tube 5 is arranged, through which air flowing at different temperature and with a flow rate adjustable by means of the bushing 10. Since the dropping velocity of protein particles 15 in the tube 5 at constant flow velocity of the air is a function of the particle diameter, all protein particles which reach a certain diameter descend down the tube 5 and enter through a cell-wheel loop 6 from the vortex shaft apparatus. All smaller protein particles are gripped by the air flow in the tube 5 and transported back 20 to the vortex layer. The supplied air 9 above the inflow bottom 4 may have the same temperature as the air 8 in the central pipe 5, but should not exceed 200 ° C, possibly. For example, the air 8 may be cold so that in the tube 5 a cooling of the proteins takes place.
2525
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD185628A DD119304A1 (en) | 1975-04-23 | 1975-04-23 | |
| DD18562875 | 1975-04-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK33376A DK33376A (en) | 1976-10-24 |
| DK167090B1 true DK167090B1 (en) | 1993-08-30 |
Family
ID=5500052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK033376A DK167090B1 (en) | 1975-04-23 | 1976-01-28 | The fluidized bed |
Country Status (4)
| Country | Link |
|---|---|
| DD (1) | DD119304A1 (en) |
| DE (1) | DE2555917A1 (en) |
| DK (1) | DK167090B1 (en) |
| SU (1) | SU1122872A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036735A2 (en) | 2000-11-06 | 2002-05-10 | Invitrogen Corporation | Dry powder cells and cell culture reagents and methods of production thereof |
| WO2003048313A2 (en) | 2001-11-30 | 2003-06-12 | Invitrogen Corporation | Cell culture media |
| US7572632B2 (en) | 1997-02-14 | 2009-08-11 | Life Technologies Corporation | Dry powder cells and cell culture reagents and methods of production thereof |
| EP2172227A1 (en) | 1998-06-30 | 2010-04-07 | Life Technologies Corporation | Methods for reducing adventitious agents or toxins in a sample and cell culture reagents produced thereby |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD136927B1 (en) * | 1978-05-22 | 1986-03-26 | Schwermaschinenbaukomb Ernst T | ANROASTIVE FLOOR FOR SWIVEL LAYER APPARATUS |
| DD137965A1 (en) * | 1978-06-14 | 1979-10-03 | Horst Bergmann | METHOD FOR DRYING AND HYGIENIZING SELF-CONTAINING SUSPENSIONS |
| IT1151577B (en) * | 1982-06-03 | 1986-12-24 | Italiana Essiccatoi | PROCEDURE AND RELATED EQUIPMENT FOR DRYING POWDERED MATERIALS IN GENERAL |
| DD217004A1 (en) * | 1983-05-18 | 1985-01-02 | Thaelmann Schwermaschbau Veb | DEVICE FOR RADIANT-LAYER DRYING OF STICKY-CERAMIC AND THERMOLATIVE SUBSTANCES |
| DD223935A1 (en) * | 1984-03-12 | 1985-06-26 | Schwermaschinenbau Kom E Thael | ROTATING DEVICE FOR SWIVEL LAYERS WITH CLASSING DROP |
| DE3565475D1 (en) * | 1984-04-07 | 1988-11-17 | Bayer Ag | Process and apparatus for the production of granules |
| DE19700029B4 (en) * | 1997-01-02 | 2006-03-09 | Glatt Ingenieurtechnik Gmbh | Fluidized bed apparatus |
| ATE286589T1 (en) | 1999-08-17 | 2005-01-15 | Unilever Nv | DEVICE FOR REMOVING A LIQUID COMPONENT FROM FINE GRAIN SOLID SUBSTANCES |
| GB2384161A (en) * | 2001-12-04 | 2003-07-23 | Powder Conditioning Ltd | Conditioning powders |
| DE10326231B4 (en) * | 2003-06-11 | 2016-04-07 | Glatt Ingenieurtechnik Gmbh | Process for the preparation of enzyme granules |
| PL1638678T3 (en) | 2003-06-11 | 2012-02-29 | Glatt Ingtech Gmbh | Method for production of enzyme granules and enzyme granules produced thus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1381504A (en) * | 1971-06-18 | 1975-01-22 | Struthers Scient International | Fluidized bed process and apparatus |
-
1975
- 1975-04-23 DD DD185628A patent/DD119304A1/xx unknown
- 1975-12-12 DE DE19752555917 patent/DE2555917A1/en not_active Ceased
-
1976
- 1976-01-28 DK DK033376A patent/DK167090B1/en active
-
1978
- 1978-06-15 SU SU782626800A patent/SU1122872A1/en active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7572632B2 (en) | 1997-02-14 | 2009-08-11 | Life Technologies Corporation | Dry powder cells and cell culture reagents and methods of production thereof |
| EP2281873A1 (en) | 1997-02-14 | 2011-02-09 | Life Technologies Corporation | Dry powder cells and cell culture reagents and methods of production thereof |
| EP2172227A1 (en) | 1998-06-30 | 2010-04-07 | Life Technologies Corporation | Methods for reducing adventitious agents or toxins in a sample and cell culture reagents produced thereby |
| WO2002036735A2 (en) | 2000-11-06 | 2002-05-10 | Invitrogen Corporation | Dry powder cells and cell culture reagents and methods of production thereof |
| EP2295533A2 (en) | 2000-11-06 | 2011-03-16 | Life Technologies Corporation | Dry powder cells and cell culture reagents and methods of production thereof |
| WO2003048313A2 (en) | 2001-11-30 | 2003-06-12 | Invitrogen Corporation | Cell culture media |
| EP2251417A1 (en) | 2001-11-30 | 2010-11-17 | Life Technologies Corporation | Dry powder cell culture medium containing liquid and methods of production thereof |
| EP2253699A1 (en) | 2001-11-30 | 2010-11-24 | Life Technologies Corporation | Dry powder cell culture products containing lipid and methods of production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| SU1122872A1 (en) | 1984-11-07 |
| DD119304A1 (en) | 1976-04-12 |
| DE2555917A1 (en) | 1976-11-04 |
| DK33376A (en) | 1976-10-24 |
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