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EP1704375B1 - Procede et dispositif pour secher un produit en particulier fluide ou pateux - Google Patents

Procede et dispositif pour secher un produit en particulier fluide ou pateux Download PDF

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Publication number
EP1704375B1
EP1704375B1 EP04764988A EP04764988A EP1704375B1 EP 1704375 B1 EP1704375 B1 EP 1704375B1 EP 04764988 A EP04764988 A EP 04764988A EP 04764988 A EP04764988 A EP 04764988A EP 1704375 B1 EP1704375 B1 EP 1704375B1
Authority
EP
European Patent Office
Prior art keywords
drying
container
hot gas
dried
drying container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04764988A
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German (de)
English (en)
Other versions
EP1704375A1 (fr
Inventor
Michael Betz
Matthias Nomayo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aguaprotec & Co GmbH KG
Original Assignee
Aguaprotec & Co GmbH KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aguaprotec & Co GmbH KG filed Critical Aguaprotec & Co GmbH KG
Publication of EP1704375A1 publication Critical patent/EP1704375A1/fr
Application granted granted Critical
Publication of EP1704375B1 publication Critical patent/EP1704375B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F26B11/0463—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall
    • F26B11/0468—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for disintegrating, crushing, or for being mixed with the materials to be dried
    • F26B11/0472—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for disintegrating, crushing, or for being mixed with the materials to be dried the elements being loose bodies or materials, e.g. balls, which may have a sorbent effect

Definitions

  • the invention relates to a method for drying a liquid or pasty material, after which the material to be dried is introduced into a drying container, which is acted upon by a hot gas and / or flows through a hot gas, and then in the drying container one of a plurality of packing existing filler is introduced.
  • the liquid or pasty Good contains before treatment regularly a high proportion of a solvent, eg. B. water, which should be reduced by a predetermined amount in the course of the drying process.
  • a solvent eg. B. water
  • a method according to the preamble of claim 1 is disclosed in US-A-4093505 disclosed.
  • JP 01004201 A comes as a drying container, a drying column used, in which the material to be dried is introduced on the head side. Starting from the bottom of the drying column, hot gas flows in. At the top of the drying column, the powdery substance thus produced is withdrawn. It can not be excluded in principle that not individual grains still are wet. In addition, the grain distribution can not be influenced practically.
  • the invention is based on the technical problem of further developing such a method so that a proper and cost-effective drying is made possible with little equipment and energy expenditure, while at the same time providing for a small grain size of the dried material.
  • a particularly suitable device is to be specified, which is particularly suitable for carrying out the method.
  • the invention proposes a method according to claim 1.
  • the invention is initially based on the recognition that the problems occurring in connection with the drying of particular liquid or pasty substances can be avoided if a loose bed of rollSystemem filler kept constantly in motion and against each other in a traversed by a hot gas drying tank is rubbed without the filling material is smashed thereby.
  • the filling material is kept constantly in motion in the drying container.
  • the drying container itself can be made to move, z. B. by rotating.
  • the filling material is thus kept in motion by rotating the drying container, eg a drum.
  • the mixing of the filling material can be improved by internals with a low surface area, for example by coaxially installed at a predetermined distance from the drum wall bars.
  • the filling bodies are set in motion with at least one agitator arranged in the drying vessel or being held.
  • the moving parts of the agitator have a low total surface area and z. B. consist of an array of rods.
  • the filling material is kept in motion in a similar manner as this is effected by appropriate installations of a rotating drum.
  • the filling bodies are kept in motion during the drying process, they hit each other and / or to the container wall, so that their surfaces are constantly renewed and then optionally crusting of the liquid or pasty material are broken up.
  • the liquid or pasty material is given in any form in the drying vessel, that is as a liquid, as a pasty mass or as a more or less solid, but moist substance, for example in the form of raw or cooked fish, meat, etc.
  • This is common to all substances or the liquid or pasty material to be dried is characterized in that the product in question forms a so-called glue phase during the drying and consequently has strongly adhesive properties in this phase.
  • the material to be dried which is at least slightly flowable when entering the drying container, due to the drying process passes into a sticky state, adheres to the packing and eventually forms a crust at this point, if necessary.
  • this running through drying glue phase there is a risk that the drying container is clogged overall and the output side is not as desired a powdery consistency is achieved.
  • the invention now meets this problem by the fact that the filling bodies are constantly kept in motion during drying and thus can not stick together or already formed crusts are broken up.
  • the hot gas is provided for drying either directly available, in which a hot air generator is used or is obtained indirectly, for example by means of a heat exchanger using other processes.
  • a filler body preferably rollable filler
  • spherical, rounded or cylindrical packing are used.
  • spherical packing or rolling bodies have proven in the form of steel balls with several centimeters in diameter particularly suitable. Because they not only have a large surface, which is important for the drying process, but are easy to keep in motion during the drying process. In most cases, the density or grain density of the filler is greater than the density of the material to be dried or the dried material.
  • filler bodies are formed so that the dry material adheres only slightly to the packing.
  • a particularly advantageous variant of the method is characterized in that gravel, z. B. natural gravel, preferably granite gravel is used. But it can also (artificial) filler metal, plastic or ceramic can be used.
  • the filler, a coating, for. B. have a hydrophobic coating, so that a total of water-repellent packing are provided.
  • the packing can have a grain size of 20 to 80 mm, z. B. 25 to 70 mm. Preferably, a grain size of 32 to 64 mm is used.
  • the Grain density of the filler should substantially exceed the density of the (dried) dry material substantially.
  • a hot gas preferably hot air of a predetermined temperature
  • the hot gas is preferably introduced with the proviso in the drying vessel, that its partial pressure of the solvent to be dried is lower than the vapor pressure of the solvent in the dry material. Consequently, the hot gas quantity, the hot gas flow rate and / or the hot gas temperature are set.
  • the hot gas may be directly or indirectly heated air.
  • solvent is meant in the context of the invention of the dry matter in the course of the drying process to be withdrawn and solvent. This may in particular be water.
  • the inlet temperature and / or the outlet temperature of the hot gas are regulated during the current drying process.
  • the inlet temperature and / or the outlet temperature are kept constant during the initial drying process so as to obtain an energy efficiency that is optimum in economic terms. If only a small amount of solvent can be evaporated off, the inlet temperature is regulated down accordingly so as not to unnecessarily heat the dry material.
  • air or gas can be passed by a controllable fan to a controllable burner or other heater, wherein the fan power is controlled by the measured outlet temperature of the hot gas from the dryer and the heat output of the burner / heater to the inlet temperature of the hot gas in the dryer.
  • the end of the drying process which z. B. can be seen on the basis of the temperature-power curve, can advantageously with the heat storage of the contents with the burner off or heater and further blower the remaining drying can be made.
  • the invention proposes that the vessel wall of the drying container is completely or at least partially heated.
  • the invention also provides a device for drying a particular liquid or pasty material, which is particularly suitable for carrying out the method described.
  • This device has a drying container, in which the material to be dried and a filling material consisting of a plurality of filler material is introduced, and further has a hot gas supply, wherein the packing in the drying container in motion and held.
  • the drying container may be a substantially horizontal or inclined drying drum.
  • the drying drum is provided with a drive unit, so that the drying drum is movable, for. B. can be rotated. The rotation of the drying drum then allows the packing arranged in the drying drum to be set in motion. It is advantageous in this context, if in the drying container Mischeinbauten, z. As rods are installed, which improve the mixing of the filler.
  • a cylindrical drum can be, for example, coaxially extending rods or rods or webs which are arranged directly at or at a predetermined distance from the drum wall.
  • the invention proposes that in the drying vessel at least one agitator is arranged, with which the Fill material can be kept in motion.
  • the agitator may be a rod agitator made up of a plurality of rods, for example coaxially disposed in the container. Again, it is of particular importance that the moving parts of the agitator have the lowest possible total surface area.
  • the packing can be kept in motion in a similar manner, as this is done with a rotating drum with corresponding internals.
  • the drying container can be designed as a multi-chamber drying container having a plurality of drying chambers, so that the drying can be carried out in a batch process.
  • the drying drum by annular discs in several, z. B. be divided into three chambers. These chambers are flowed through by the hot gas in succession, so that you can work in the successive chambers at different, decreasing temperature level. In this way, an improved energy yield can be achieved.
  • the chambers are filled depending on the respective temperature level with different amounts of filler and dry matter, so that the drying process in all chambers can be completed at the same time.
  • a comparable effect can also be achieved with a single-chamber drying container, if this - as already mentioned - is operated in an inclined position, that is, when the longitudinal axis of the drying drum is arranged inclined at a predetermined angle to the horizontal. Then there is a higher amount of material during operation in the lowered portion of the container than in the non-lowered portion.
  • the hot air is preferably supplied in this embodiment from the direction of the lowered end side of the container. The hot air thus flows through and to areas of the container with decreasing capacity. In this way, the fact is taken into account that the temperature of the hot gas in the course of flowing gradually decreases and at the same time the water vapor content increases, so that the hot gas during passage through the drum can absorb different amounts of water vapor.
  • the drying container has one or more closable screen openings.
  • sieve openings are provided in the region of each chamber.
  • Sieve opening means a covered or filled with a sieve opening or opening in the container wall.
  • Closable means that the sieve opening can be closed with at least one lid, at least one flap, at least one slide or the like.
  • the dried powdery or granular dry material or dried material passing by the continuous movement can be discharged at the sieve opening, the filling material (filling material or filler plus still moist material) remaining in the drum. It is useful if the mesh size of the sieves in the sieve openings is set up so that only the dry material and not the filling bodies are discharged. The heat stored in the packings can thus be used for subsequent drying processes. In the course of the drying process, the screen openings remain closed as long as the drum wall liquid or pasty dry material is passed. Only then are the sieve openings released, so that the discharge of the material to be dried can begin.
  • the invention proposes that a collecting container for the dried material emerging from the sieve openings be arranged below the drying container. But it is also possible to operate the system according to the invention continuously, so that a continuous drying process is performed, in which the Feeding the material to be dried and the discharge of the dried material done continuously.
  • the hot air supply preferably has at least one heater, for. As a burner, and at least one fan.
  • the blower is preferably a controllable blower.
  • the burner is preferably designed as a controllable burner.
  • the container walls of the drying container can be heated.
  • the z. B. may be formed helical, and on the one hand support mixing on the other hand facilitate the loading and unloading of the dryer with filler and / or dry material.
  • this agitator z. B. by screw-like arrangement of the internals allows the transport of the filler to allow loading and unloading of the dryer with filler or to facilitate.
  • the drying container has an inlet opening and an outlet opening with a large cross section, which allow a virtually resistance-free flow through the drying container with hot gas.
  • the drying tank has only one opening with a large cross-section for gas exchange. Then the hot gas can be blown into the vessel by means of a lance with a significantly smaller cross-section.
  • the arrangement of the 'internals of the drying container should be designed so that there are no blind spots in which the dry material can collect, without being able to be abraded by the filler can.
  • the discharge of the dried material can be done hydraulically, for example by means of air flow.
  • care must be taken to ensure that the air velocity is high enough to be able to transport the fines or powdered dried material to the outlet or from the inlet opening to the outlet opening. In this way it is ensured that the dried product with the desired degree of drying and in the required consistency immediately discharged and removed from the heating zone.
  • the largest part of the dried material can be discharged via a separator, such as a cyclone, wherein the need for the discharge air or the gas, which is warmed up as a result of the drying process, are returned to energy optimization.
  • a separator such as a cyclone
  • the air flow used for the discharge of the dried material is used through the drying tank through to the outlet in three ways.
  • the air flow is adjusted so that only dried material is transported with the desired powder fineness, which therefore has as a result of the grinding process through the packing on the desired grain size.
  • the air flow ensures that only dried material is discharged which has the desired moisture content. Both can be controlled with the speed of the air flow, in that only particles of a certain size and an associated weight are (can) be transported by the air flow at all.
  • the air flow ensures that the already dry and present in the desired consistency Good is not unnecessarily further dried and subjected to the hot gas. It is understood that the air flow for discharge usually coincides with the hot gas for the drying process, although of course different air currents on the one hand for drying and on the other hand for the Discharge be covered by the invention. If the hot gas is used both for the drying process and for the discharge of the dried material, it will be provided in any case a return to the inlet after separation of the dried material for reasons of energy efficiency.
  • the single FIGURE shows a schematic side view of an apparatus according to the invention for drying a liquid or pasty material 1a.
  • This has a drying container 2, in which the material to be dried 1a and one of a plurality of packing 3 existing filling material is introduced.
  • a hot air supply 4 is connected, which has a hot air generator 5.
  • the hot air generator 5 is connected to the drying container 2 via a hot air duct 6.
  • According to the packing 3 are brought into the drying container 2 in motion and kept in motion during the drying process.
  • the drying container 2 is designed as a rotatably mounted drying drum 2, whose longitudinal axis ⁇ is inclined at a predetermined angle to the horizontal.
  • the angle ⁇ may for example be 1 ° to 10 °, preferably 1 ° to 5 °. In the exemplary embodiment, the angle ⁇ is approximately 3 °. There is the possibility that the angle ⁇ is adjustable via a suitable adjusting mechanism. This is not shown in the figure.
  • a drive unit 7 is connected to the drying drum or the drying container 2, with which the drying drum 2 can be set in rotation.
  • a suitable sprocket 8 is placed on the front side of the drying drum 2, which is in operative connection with the drive shaft.
  • the drive can also be connected in other ways with the drying drum 2.
  • the packing 3 are set in motion.
  • the packing 3 is rollable filler, z.
  • these fillers or rolling bodies 3 initially provide an additional surface (in addition to walls of the drying container 2).
  • the filler 3 represent a quasi-continuous mill, in which the surfaces are constantly renewed by rotation and friction.
  • the container walls are constantly scraped.
  • the adhesion of the moist material 1a to the surfaces is consequently continuously broken and renewed so that no thick layers can form.
  • the effect is improved by arranging mixing installations in the form of rods or webs 9 in the drying container 2.
  • such webs are shown as a driver 9, which extends in the container longitudinal direction and z. B. are connected directly to the drum inner wall.
  • a corresponding lid 12 for closing the sieve opening 11 is indicated in the single figure.
  • the sieve opening 11 initially remains closed. If the sieve opening 11 is then released, the discharge of the dried product 1b can take place.
  • a collecting container for the dried product 1 b emerging from the sieve opening 11 can be arranged below the drying container 2. In the figures, this collecting container 13 is merely indicated.
  • the screen disposed within the screen opening 11 has a mesh size such that the discharge of the packing 3 is prevented. At the same time, however, the discharge of the dried product 1b is made possible, which is finely ground by the constant movement.
  • the drying container 2 flows through the hot air in the course of the drying process.
  • an exhaust air line 14 is connected to the hot air supply 4 opposite side of the drying tank 2.
  • the supply of material via the supply line 10 also takes place from the side opposite the hot air supply side of the drying drum 2.
  • the support of the drying drum 2 can be done via a plurality of bearings 15, which may be formed as a rolling bearing or plain bearings.
  • a pressure bearing 16 is indicated in the figures, which may be formed, for example, as a sliding bearing. against this thrust bearing 16, the inclined drying drum 2 is supported from the front side.
  • the figure also shows that when inclined drying drum 2, the hot air supply 4 from the direction of the lowered end side of the drying drum 2 takes place. This is important because when operating in an inclined position in the lowered (right) area of the drum 2 regularly higher amounts of material are present as in the not lowered or raised (left) portion of the drum 2. In this case, the amount of material to be dried 1a from the non-lowered end of the drying drum 2 to the lowered end of the drying drum 2 as it were continuously too. Consequently, the hot air gradually flows through different filling regions of the drying container 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Claims (5)

  1. Procédé de séchage d'un produit fluide ou pâteux (1a) dans lequel, premièrement, on introduit le produit à sécher (1a) dans un récipient de séchage (2), deuxièmement, on alimente ledit récipient de séchage avec un gaz chaud qui circule à travers le récipient, troisièmement, on introduit dans ledit récipient (2) un matériau de remplissage constitué d'une pluralité de corps de remplissage (3) qui, maintenus en mouvement durant le séchage, entrent en contact entre eux et/ou avec le produit à sécher (1a) et/ou avec l'une des parois du récipient de séchage (2), caractérisé en ce que l'introduction d'air chaud (4) s'effectue, par rapport au récipient de séchage (2), du côté opposé à la conduite d'admission (10), et en ce que la quantité, la vitesse de circulation et/ou la température de l'air chaud sont réglables de sorte telle qu'après introduction de l'air chaud dans le récipient (2) la pression partielle au niveau du solvant à extraire par séchage est inférieure à la pression de la vapeur du solvant dans le produit séché (1b).
  2. Procédé selon la revendication 1 ou 2, caractérisé en ce que la température d'entrée et/ou la température de sortie du gaz chaud sont réglées au cours du séchage.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'air chaud circule dans le récipient de séchage (2) dans le sens inverse à celui du produit.
  4. Procédé selon la revendication 1, caractérisé en ce que le produit séché peut être extrait du récipient (2) à travers une ou plusieurs ouvertures obturables (11) dotées de tamis.
  5. Procédé selon la revendication 1, caractérisé en ce que les corps de remplissage (3) sont dotés d'un revêtement hydrophobe.
EP04764988A 2003-10-08 2004-09-09 Procede et dispositif pour secher un produit en particulier fluide ou pateux Expired - Lifetime EP1704375B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10347291A DE10347291B3 (de) 2003-10-08 2003-10-08 Verfahren und Vorrichtung zum Trocknen eines insbesondere flüssigen oder pastösen Trockengutes
PCT/EP2004/010051 WO2005038371A1 (fr) 2003-10-08 2004-09-09 Procede et dispositif pour secher un produit en particulier fluide ou pateux

Publications (2)

Publication Number Publication Date
EP1704375A1 EP1704375A1 (fr) 2006-09-27
EP1704375B1 true EP1704375B1 (fr) 2012-04-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04764988A Expired - Lifetime EP1704375B1 (fr) 2003-10-08 2004-09-09 Procede et dispositif pour secher un produit en particulier fluide ou pateux

Country Status (5)

Country Link
EP (1) EP1704375B1 (fr)
AT (1) ATE553343T1 (fr)
DE (1) DE10347291B3 (fr)
PE (1) PE20050799A1 (fr)
WO (1) WO2005038371A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109959239B (zh) * 2019-03-27 2021-07-09 徐敏丹 一种轮胎颗粒脱水烘干机
CN113465327B (zh) * 2021-06-23 2022-10-21 重庆新申世纪新材料科技有限公司 一种无机材料合成用的烘干装置

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GB191507198A (en) * 1915-05-13 1916-04-13 Liquid Purification Company Lt Improvements in Rotary Driving Machines.
GB122077A (en) * 1918-03-13 1919-01-16 Thomas William Staine Hutchins Improvements in Drying and like Apparatus.
US1730902A (en) * 1925-07-25 1929-10-08 American Cyanamid Co Method of and means for drying
FR634981A (fr) * 1926-09-28 1928-03-03 Alsacienne Constr Meca Procédé de séchage et de broyage de matières boueuses, pâteuses ou analogues ensuspension ou en dilution dans un liquide
DE591386C (de) * 1931-01-11 1934-01-19 Arno Andreas Drehtrommel zum gleichzeitigen Trocknen und Mahlen
US2126029A (en) * 1934-11-13 1938-08-09 Vickers Armstrongs Ltd Apparatus for drying slurry and other materials
DE1205120B (de) * 1961-01-19 1965-11-18 Kalk Chemische Fabrik Gmbh Verfahren zur Herstellung von granulierten PK-Duengemitteln
FR1587398A (fr) * 1968-09-27 1970-03-20
US3909410A (en) * 1973-02-20 1975-09-30 Young W Elmo Process for treating sewage sludge
JPS5857672B2 (ja) * 1975-10-04 1983-12-21 ニツテツカコウキ カブシキガイシヤ ガンスイブツノカネツ ダツスイホウホウ
US4894930A (en) * 1987-04-01 1990-01-23 Productization, Inc. Rotary drum dryer with nonconducting nonstick surface
JP2547023B2 (ja) * 1987-06-27 1996-10-23 株式会社 大川原製作所 液状物粉末化装置
AU627056B2 (en) * 1989-09-28 1992-08-13 Nikken Corporation Raw sewage drying apparatus
GB9012463D0 (en) * 1990-06-05 1990-07-25 North Roger D Drying apparatus/method
DE4343756C2 (de) * 1992-12-22 2002-10-24 Murata Manufacturing Co Verfahren und Vorrichtung zur Wärmebehandlung von feinem Pulver
JPH06198158A (ja) * 1992-12-29 1994-07-19 Murata Mfg Co Ltd セラミックス原料粉末の造粒方法
JP3319081B2 (ja) * 1993-10-13 2002-08-26 株式会社村田製作所 セラミック原料熱処理装置
JP3508178B2 (ja) * 1993-10-21 2004-03-22 株式会社村田製作所 セラミック微粉体材料の製造方法
WO2001026802A1 (fr) * 1999-10-12 2001-04-19 Manchak Frank Traitement thermique et physique ameliore des dechets

Also Published As

Publication number Publication date
WO2005038371A1 (fr) 2005-04-28
EP1704375A1 (fr) 2006-09-27
PE20050799A1 (es) 2005-10-01
ATE553343T1 (de) 2012-04-15
DE10347291B3 (de) 2005-05-25

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