WO1996034239A1 - Dispositif de sechage de substances cristallines - Google Patents

Dispositif de sechage de substances cristallines Download PDF

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Publication number
WO1996034239A1
WO1996034239A1 PCT/EP1996/001726 EP9601726W WO9634239A1 WO 1996034239 A1 WO1996034239 A1 WO 1996034239A1 EP 9601726 W EP9601726 W EP 9601726W WO 9634239 A1 WO9634239 A1 WO 9634239A1
Authority
WO
WIPO (PCT)
Prior art keywords
residual moisture
rotation
stirring blade
drying
drying chamber
Prior art date
Application number
PCT/EP1996/001726
Other languages
German (de)
English (en)
Inventor
Wolfgang Schmelter
Original Assignee
Schering Aktiengesellschaft
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 Schering Aktiengesellschaft filed Critical Schering Aktiengesellschaft
Priority to BR9608073A priority Critical patent/BR9608073A/pt
Priority to DE19680284T priority patent/DE19680284D2/de
Priority to EP96914119A priority patent/EP0824662A1/fr
Priority to AU57613/96A priority patent/AU5761396A/en
Priority to JP8532172A priority patent/JPH11504752A/ja
Publication of WO1996034239A1 publication Critical patent/WO1996034239A1/fr
Priority to IS4592A priority patent/IS4592A/is
Priority to MXPA/A/1997/008022A priority patent/MXPA97008022A/xx
Priority to NO974929A priority patent/NO974929L/no

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H05B6/707—Feed lines using waveguides
    • 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
    • F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
    • F26B11/14—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane
    • 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
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/04—Heating using microwaves
    • H05B2206/046—Microwave drying of wood, ink, food, ceramic, sintering of ceramic, clothes, hair

Definitions

  • the invention relates to a device for drying material solutions, crystalline substances with residual moisture, and also solids with residual moisture, suspensions, emulsions and / or colloids. Drying is carried out using microwaves and a mechanical stirrer.
  • the invention further comprises a method for producing sugar-containing ultrasound contrast agents using a device according to the invention.
  • the temperature is controlled by supplying thermal energy with the aid of microwave radiation of 0.5-15 GHz, preferably 0.91 5 and 2.45 GHz.
  • the disadvantage of these design solutions is that they are O 96-34239
  • Applicators come to local overheating. As a result, the products to be dried are partially decomposed thermally. This overheating occurs particularly in the area of product accumulations on splashes of the material on conductive and non-conductive surfaces on the inner surfaces of the applicator.
  • a device for drying (i) material solutions, (ii) crystalline substances with residual moisture, (iii) solids with residual moisture, (iv) suspensions, (v) emulsions and / or (vi) colloids
  • the Device comprises at least one, preferably cylindrical and prismatic drying chamber (TK 1 and TK 2), preferably evacuable and temperable, in which an agitator is arranged, the device comprising at least one microwave coupler (1),
  • the microwave coupler is connected to the drying chamber (TK1 or TK2);
  • a separating surface (2) is arranged in the microwave coupler and is oriented essentially perpendicular to the longitudinal axis L of the microwave coupler;
  • the microwave coupler is conical, the cone opening with the larger cross section facing the drying chamber; and (d) the microwave coupler has the following proportions:
  • L1 partial length of the longitudinal axis L, which points from the opening surface (2) in the direction away from the drying chamber (TK1 or TK2)
  • L2 partial length of the longitudinal axis L, which points from the parting surface (2) towards the drying chamber (TK1 or TK2)
  • D2 diameter of the microwave coupler (1) at the level of the separating surface (2)
  • D1 diameter of the microwave coupler (1) at the level of the opening to the drying chamber ((TK1 or TK2).
  • the device preferably comprises several drying chambers, most preferably two drying chambers. At least one microwave coupler is connected to each drying chamber. A plurality of microwave couplers are preferred per drying chamber. In addition, the drying chamber has at least one stirring system. The microwave coupler and the stirring systems can be controlled by known control units.
  • the microwave couplers (taper) are conical, the larger cross section facing the drying chamber and the smaller cross section connected to the generator.
  • a separating surface is arranged between the two cone openings, the position of which is determined according to the proportions and dimensions mentioned above. The diameter of the separating surface should not be less than 120 mm. The distance between the large cone opening and the parting surface should be at least 100 mm. The surface of the separating surface has a minimal absorption coefficient, so that the splashes of the solutions do not spread on the surface.
  • Microwave drying usually also includes a stirring method.
  • Known agitators can be used here.
  • a device according to the invention is preferred in which the material of the separating surface has a minimal absorption coefficient. In this way, local thermal heating can be successfully avoided.
  • a device according to the invention is preferred in which the (i) material solutions, (ii) crystalline substances with residual moisture, (iii) solids with residual moisture, (iv) suspensions, (v) emulsions and / or (vi) colloids comprise sugar. Monosaccharides are more preferred. Even more preferred are material solutions, crystalline substances with residual moisture or solids with residual moisture that comprise a contrast agent. An ultrasound contrast agent is most preferred.
  • stirrer comprises a stirrer shaft to which at least one L-shaped stirring blade is fastened; the stirring blade is characterized by the following proportions and dimensions:
  • the blades have an angle to the plane of rotation
  • the cross section of the blades is triangular and has a lower blade surface, a rear blade surface and a rear surface, the rear blade surface points in the direction of the short leg, the angles being characterized by the following values:
  • the combination of the special microwave coupler and the stirring blades successfully prevents thermal decomposition of the products.
  • the amount of microwave energy added can be controlled in a targeted manner depending on the drying progress and the changes in the physical properties of the material inside the product. In this way, the increased diffusion resistances associated with the consolidation are successfully compensated. Baking and overheating of the product is successfully avoided. The drying process is targeted. The result is a product that meets the high demands placed on pharmaceutical products.
  • the device according to the invention has the advantage that by the special embodiment of the microwave coupler, in particular by the defined size and position of the separating surface of the coupler in connection with specifically designed stirrers of the drying process - preferably under vacuum - by measuring the amount of condensate and a control system which determines that it is exceeded Temperature limits in the interior of the product to be dried are prevented, caking and thermal destruction of the product are reliably avoided and drying of the product up to a defined value is made possible.
  • the drying progress is determined by the amount of condensate in the amount of liquid evaporated.
  • the diffusion resistance of the product increases with increasing solids content compared to the solvent to be separated. With the lower evaporating solvent flow, less energy is dissipated with constant energy supply.
  • the temperature of the product rises. When energy is supplied by means of microwave radiation, this temperature rise occurs primarily inside the product and is difficult or impossible to measure on the surface.
  • This physical process is reproducible with the progress of drying and is taken into account in the control system in such a way that the deviation of the inside temperature from the outside temperature of the product is determined under identical drying conditions at different points of progress (condensate amounts of the separated solvent, certain solvent content). Different sizes and types of product agglomerates or product agglomerations must be taken into account.
  • the product temperature determined in this way is a controlled variable for the control unit, which in turn determines the energy supply of the microwave radiation.
  • a device according to the invention is preferred in which the
  • Diffusion resistance of the product is used as a control variable depending on the drying progress.
  • a device is preferred in which the stirrer (R2) projecting into the drying chamber (TK2) has at least one stirring blade and additionally has one or more loosening agitator blades which are staggered one above the other and which are arranged at a distance (A-
  • A-) - A n 60 mm to 100 mm.
  • the loosening agitator blades have angles to the plane of rotation; the cross-section of the loosening stirring blades is trapezoidal and the cross-section of the loosening stirring blades is determined by the angles with the following values: ⁇ -angle between the underside of the stirring blade and the plane of rotation has the value 5 ° to 15 °; ⁇ angle between the beveled top of the blade and the plane of rotation has the value 20 ° to 45 °; and ⁇ -angle between the back of the impeller and the axis of rotation has the value 5 ° to 15 °.
  • a device according to the invention is particularly advantageous in which the special shape and arrangement of the stirring blades of the stirrer in the first drying chamber and the additional loosening stirring blades in the second drying chamber work together in a sensible manner.
  • the specific cross-sectional shape and arrangement of the stirring blades ensures optimal loosening and mixing of the product. The mix is therefore not only pushed back and forth by the stirring blades, but the drying process is accelerated and optimally designed by means of the stirrers.
  • a particularly advantageous effect is achieved with a device according to the invention by tempering the jacket of the drying chambers in a known manner, so that, depending on the progress of consolidation and the course of the change in toughness, the shear forces between the inner surface of the drying chamber and the product are positive by slightly increasing or decreasing the wall temperature to be influenced.
  • the invention further comprises a method for drying (i) material solutions, (ii) crystalline substances with residual moisture, (iii) solids with residual moisture, (iv) suspensions, (v) emulsions and / or (vi) colloids, the method comprises the following steps: aa) preparation of the solution, bb) optionally filtration, cc) microwave drying by means of a device for drying (i) material solutions, (ii) crystalline substances with residual moisture, (iii) solids with residual moisture, (iv) suspensions, (v) emulsions and / or (vi) colloids, the device comprising at least one essentially cylindrical or prismatic drying chamber in which an agitator is arranged, the device comprising at least one microwave coupler, (a) the microwave coupler is connected to the drying chamber;
  • a separating surface is arranged in the microwave coupler which is oriented essentially perpendicular to the longitudinal axis L of the microwave coupler;
  • microwave coupler is conical, the cone opening with the larger one
  • L1 partial length of the longitudinal axis L, which of the
  • L2 partial length of the longitudinal axis L, which of the
  • D2 diameter of the microwave coupler at the level of the interface
  • D1 diameter of the microwave coupler at the level of the opening to the drying chamber; d) final drying and e) comminution.
  • the filtration can be sterile or ultrafiltration or a combination of both.
  • the product resulting from the final drying has a residual moisture content of 1 percent by weight, preferably 0.5 percent by weight or less.
  • the product created by this process can be sold as a diagnostic.
  • a method according to the invention is preferred, wherein the material of the separating surface has a minimal absorption coefficient.
  • a method according to the invention is very advantageous, the (i) material solutions, (ii) crystalline substances with residual moisture or (iii) solids with residual moisture comprising sugar.
  • a method is preferred in which the sugar is a monosaccharide.
  • a method according to the invention is more preferred, the (i) material solutions, (ii) crystalline substances with residual moisture or (iii) solids with residual moisture comprising a contrast agent.
  • a method according to the invention is most preferred, the (i) material solutions, (ii) crystalline substances with residual moisture or (iii) solids with residual moisture comprising an ultrasound contrast agent.
  • the stirrer (R 1) comprises a stirrer shaft to which at least one L-shaped stirrer blade is attached;
  • the stirring blade is characterized by the following proportions and dimensions: (0.9 ⁇ B1 ⁇ 1, 3) • ⁇ • (TK1) exp (-1/2) 1, 5 ⁇ B2 / B1 ⁇ 2.5 (0.65 ⁇ B3 ⁇ 1, 35) « ⁇ / 2 ;
  • the stirring blades have angles to the plane of rotation, the cross section of the stirring blades being triangular and has one
  • a method according to the invention is preferred, in which the stirrer (R2) projecting into the drying chamber (TK2) has at least one stirring blade and additionally one or more loosening stirring blades which are staggered one above the other and are at a distance (A-) ... A n ) from the lower rotation plane of the stirrer (R2) are arranged and have the leg width (B4) and include the following proportions and dimensions:
  • Ai - A ⁇ 60 mm to 100 mm.
  • a method according to the invention is more preferred, wherein the loosening stirring blades have angles to the plane of rotation; wherein the cross section of the loosening blades is trapezoidal and the cross-section of the loosening blades is determined by the angles with the following values: ⁇ -angle between the underside of the blade and the plane of rotation has the value 5 ° to 15 °; ⁇ angle between the bevelled top of the stirring blade and the
  • the plane of rotation has the value 20 ° to 45 °.
  • the o-angle between the back of the dial and the axis of rotation has the value 5 ° to 15 °.
  • a method according to the invention for drying comprises the following steps: a) preparation of the solution, b) optionally filtration, c) microwave drying by means of the device, d) final drying, e) comminution and f) agglomeration.
  • the purpose of the agglomeration is to convert a comminuted substance that is difficult to handle and transportable into a form that does not have these problems.
  • the property of rapidly dissolving should not be impaired.
  • the particles in the agglomerite bodies are held together by Van der Vaal forces.
  • the product obtained by this previously described method is the substance that is sold with great satisfaction. It is easy to incorporate the product in solutions. Then it can be injected into patients. It enables imaging diagnostics to be carried out on the human or animal body, a data material being created which allows the doctor to propose appropriate treatment therapy on the basis of his specific knowledge and specialist knowledge.
  • a method according to the invention in which the material solution is used is more preferred
  • Ultrasound contrast medium contains, most preferred is an ultrasound contrast medium which comprises a monosaccharide, in particular Contrast agents are preferred, which are described in detail in the publications EP-A 0 052 575 and EP-A 0 365 467 mentioned above.
  • the Echovist and Levovist diagnostics include gaseous microparticles based on galactose, with and without palmitic acid.
  • a method according to the invention is very preferred, the material solution containing an ultrasound contrast agent.
  • the ultrasound contrast medium comprising monosaccharides.
  • Figure 1 shows a schematic representation of the device.
  • FIG. 2 shows a schematic illustration of the microwave coupler.
  • FIG. 3 shows a top view of the stirring blades and a section through a stirring blade of the stirrer of the first drying chamber along the section A - A.
  • FIG. 4 shows a top view of the stirring blades and a section through a loosening stirring blade of the stirrer of the second drying chamber along the section B - B.
  • a device for drying solutions is shown schematically in FIG.
  • these are sugary liquids, namely either Echovist or Levovist.
  • the device consists of a first drying chamber TK 1 with a stirrer R1 and a second drying chamber TK 2 with a stirrer R2.
  • Microwave couplers 1 with generators G and a control unit S are located on the ceiling of the drying chambers.
  • a comminution machine of known type is arranged between the two drying chambers.
  • the product to be dried is introduced into the first drying chamber TK 1 through an inlet opening, not shown.
  • corresponding generator microwave energy is introduced into the drying chamber TK 1 by the generator G via the microwave coupler 1.
  • the stirrer R 1 is set in rotation.
  • the surface temperature and the progress of drying are measured by known sensors, also not shown in the figure, and passed on to the control unit S. Depending on the progress of drying, this controls the amount of energy for the microwave coupler 1 of the drying chamber TK 1 and also the speed of the stirrer R 1 in the manner described above via an installed control program.
  • the drying process is then continued in the second drying chamber TK 2. Also in the second drying stage, the amount of energy for the microwave coupler 1 and for the speed of the stirrer R 2 is regulated in approximately the same way as described above.
  • FIG. 2 shows a microwave coupler 1. It has a conical design. The opening with the smaller cross-section faces the generator G and has a square design. The opposite opening, which is connected to the drying chamber, has a round cross section.
  • the microwave coupler 1 is divided into two sectors by a separating surface 2.
  • the surface of the separating surface 2 is perpendicular to the longitudinal axis of the microwave coupler 1 and is divided into two sectors by the separating surface 2.
  • the surface of the separating surface 2 is perpendicular to the longitudinal axis of the microwave coupler 1.
  • the longitudinal axis is divided into two partial lengths.
  • the partial length L 1 points from the separating surface 2 to the generator G or away from the drying chamber TK 1 or TK 2.
  • the partial length L 1 extends from the separating surface 2 to hm to the drying chamber TK1 or TK 2.
  • the sum of the partial lengths L 1 and L 2 gives the total length of the longitudinal axis L.
  • the separating surface has a diameter D 2.
  • the opening of the microwave coupler, which points to the drying chamber, has a diameter D 1.
  • the relation of the individual lengths, namely L 1, L 2, D 1 and D 2 has been set out in the previous text of the description. Of course, those are in the figure 2 shown proportions are not binding, rather it is a schematic representation.
  • FIG. 3 shows three stirring blades 3 of the stirrer R 1.
  • the stirring blades 3 are L-shaped.
  • the direction of rotation of the stirring blades is essentially parallel to the bottom surface of the drying chamber TK 1.
  • a stirring shaft 8 of the stirrer R 1 is perpendicular to the bottom surface.
  • the stirring blades are shown in FIG. 3 both in a top view and in section along the cutting plane A - A
  • the length of the short leg has the designation B 2.
  • the proportions of the length dimensions B 1, B 2 and B 3 have been explained in detail in the previous text. In this case too, the proportions shown are only to be understood schematically.
  • the cross section represented by section A - A of one of the stirring blades 3 has a triangular shape.
  • Such a stirring blade 3 has three surfaces, namely a downward-facing stirring blade lower surface 5, an upward-pointing stirring blade surface 6 and an essentially sideways-pointing rear stirring blade surface 7.
  • Three angles are essential for the specific orientation of the aforementioned three stirring blade surfaces, namely the angles ⁇ , ß and ⁇ .
  • the angle ⁇ is from the back of the stirring blade 7 and the axis of rotation; the angle ⁇ is formed by the bottom surface of the stirring blade 5 and the plane of rotation, and the angle ⁇ is formed by the surface of the stirring blade 6 and the plane of rotation.
  • FIG. 4 shows the shape of loosening stirring blades 4 in a top view and in a section, the section being taken along the plane BB.
  • the loosening stirring blades 4 are arranged with a stirring shaft 8 of the stirrer R 2 at a certain distance. The total distance is the sum of Aj to A n .
  • the loosening stirring blades 4 are perpendicular to the stirring shaft 8 and are arranged spirally around the stirring shaft 8.
  • the width of one of the loosening stirring blades 4 is designated B 4.
  • Section B - B shows the trapezoidal cross section of one of the loosening stirring blades 4.
  • the angles ⁇ , ⁇ and ö are characteristic of the arrangement of the surfaces of the trapezoid.
  • the angle ⁇ is formed by the underside of the stirring blade and the plane of rotation.
  • the angle ⁇ results from the bevelled top of the stirring blade and the plane of rotation.
  • the angle ⁇ is formed by the back of the impeller blade and the axis of rotation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un dispositif de séchage par micro-ondes de substances en solution. Des agitateurs R 1 et R 2 montés dans les chambres de séchage TK 1 et TK 2 aident le séchage. L'énergie d'un générateur G parvient aux chambres de séchage TK 1 et TK 2 à travers un coupleur de micro-ondes (1) subdivisé par une surface de séparation en une partie antérieure et en une partie postérieure. Une unité de régulation S régule aussi bien l'apport d'énergie que la vitesse de rotation des agitateurs.
PCT/EP1996/001726 1995-04-26 1996-04-25 Dispositif de sechage de substances cristallines WO1996034239A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BR9608073A BR9608073A (pt) 1995-04-26 1996-04-25 Dispositivo para a secagem de substâncias cristalinas
DE19680284T DE19680284D2 (de) 1995-04-26 1996-04-25 Vorrichtung zum Trocknen von kristallinen Substanzen
EP96914119A EP0824662A1 (fr) 1995-04-26 1996-04-25 Dispositif de sechage de substances cristallines
AU57613/96A AU5761396A (en) 1995-04-26 1996-04-25 Crystalline substances drying device
JP8532172A JPH11504752A (ja) 1995-04-26 1996-04-25 結晶質を乾燥させるための装置
IS4592A IS4592A (is) 1995-04-26 1997-10-16 Þurrkbúnaður fyrir kristallað efni
MXPA/A/1997/008022A MXPA97008022A (en) 1995-04-26 1997-10-17 Apparatus for drying substances cristali
NO974929A NO974929L (no) 1995-04-26 1997-10-24 Innretning for törking av krystallinske substanser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19516254A DE19516254A1 (de) 1995-04-26 1995-04-26 Vorrichtung zum Trocknen von stofflichen Lösungen, kristallinen Substanzen mit Restfeuchte, insbesondere für zuckerhaltige Flüssigkeiten
DE19516254.4 1995-04-26

Publications (1)

Publication Number Publication Date
WO1996034239A1 true WO1996034239A1 (fr) 1996-10-31

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ID=7760989

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/001726 WO1996034239A1 (fr) 1995-04-26 1996-04-25 Dispositif de sechage de substances cristallines

Country Status (15)

Country Link
EP (1) EP0824662A1 (fr)
JP (1) JPH11504752A (fr)
KR (1) KR19990008067A (fr)
CN (1) CN1182476A (fr)
AU (1) AU5761396A (fr)
BR (1) BR9608073A (fr)
CA (1) CA2219295A1 (fr)
CZ (1) CZ339897A3 (fr)
DE (3) DE19549494A1 (fr)
HU (1) HUP9802481A3 (fr)
IS (1) IS4592A (fr)
NO (1) NO974929L (fr)
PL (1) PL322970A1 (fr)
TR (1) TR199701244T1 (fr)
WO (1) WO1996034239A1 (fr)

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ES2192980B2 (es) * 2002-01-16 2006-06-01 Baucis, S.A. Mezcladora-secadora-reactor por microondas.
UA86702C2 (ru) * 2007-09-11 2009-05-12 Закрытое Акционерное Общество "Технологический Парк "Институт Монокристаллов" Сушилка для сыпучих диэлектрических материалов
CN108981328A (zh) * 2018-06-30 2018-12-11 湖州全优电工材料有限公司 一种高效新型硅粉干燥装置
KR102084611B1 (ko) * 2019-05-13 2020-05-04 김태영 슬러지 처리장치
CN110986525B (zh) * 2019-12-25 2021-08-13 常州市华夏干燥制粒设备有限公司 一种旋转闪蒸干燥器
CN115493363A (zh) * 2022-09-26 2022-12-20 董清臣 一种微波烘干杀菌设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982001062A1 (fr) * 1980-09-23 1982-04-01 Courneya C Sechage de materiau a haut rendement
FR2500218A1 (fr) * 1981-02-19 1982-08-20 Auhfa Applicateur hyperfrequence perfectionne
EP0312741A2 (fr) * 1987-08-29 1989-04-26 Nissui Kako Co., Ltd. Procédé et dispositif pour le séchage de matériau synthétique au moyen de micro-ondes
EP0420499A2 (fr) * 1989-09-28 1991-04-03 Japanic Corporation Toilette portative
EP0437267A1 (fr) * 1990-01-11 1991-07-17 Shoji Nakagomi Appareil pour sécher de la matière plastique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982001062A1 (fr) * 1980-09-23 1982-04-01 Courneya C Sechage de materiau a haut rendement
FR2500218A1 (fr) * 1981-02-19 1982-08-20 Auhfa Applicateur hyperfrequence perfectionne
EP0312741A2 (fr) * 1987-08-29 1989-04-26 Nissui Kako Co., Ltd. Procédé et dispositif pour le séchage de matériau synthétique au moyen de micro-ondes
EP0420499A2 (fr) * 1989-09-28 1991-04-03 Japanic Corporation Toilette portative
EP0437267A1 (fr) * 1990-01-11 1991-07-17 Shoji Nakagomi Appareil pour sécher de la matière plastique

Also Published As

Publication number Publication date
DE19516254A1 (de) 1996-10-31
AU5761396A (en) 1996-11-18
HUP9802481A3 (en) 1999-04-28
EP0824662A1 (fr) 1998-02-25
MX9708022A (es) 1997-11-29
HUP9802481A2 (hu) 1999-02-01
TR199701244T1 (xx) 1998-02-21
IS4592A (is) 1997-10-16
DE19549494A1 (de) 1997-10-02
BR9608073A (pt) 1999-01-26
CN1182476A (zh) 1998-05-20
JPH11504752A (ja) 1999-04-27
CZ339897A3 (cs) 1998-06-17
NO974929L (no) 1997-12-23
PL322970A1 (en) 1998-03-02
KR19990008067A (ko) 1999-01-25
DE19680284D2 (de) 1999-07-01
CA2219295A1 (fr) 1996-10-31
NO974929D0 (no) 1997-10-24

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