EP0408801A1 - Spray drying apparatus - Google Patents

Spray drying apparatus Download PDF

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Publication number
EP0408801A1
EP0408801A1 EP19890113481 EP89113481A EP0408801A1 EP 0408801 A1 EP0408801 A1 EP 0408801A1 EP 19890113481 EP19890113481 EP 19890113481 EP 89113481 A EP89113481 A EP 89113481A EP 0408801 A1 EP0408801 A1 EP 0408801A1
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EP
European Patent Office
Prior art keywords
nozzle
water
pressure
nozzle unit
feed liquid
Prior art date
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Granted
Application number
EP19890113481
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German (de)
French (fr)
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EP0408801B1 (en
Inventor
Toshiyuki Tanaka
Akira Kodera
Shizuo Aishima
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Ohkawara Kokohki Co Ltd
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Ohkawara Kokohki Co Ltd
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Application filed by Ohkawara Kokohki Co Ltd filed Critical Ohkawara Kokohki Co Ltd
Priority to DE1989624848 priority Critical patent/DE68924848T2/en
Publication of EP0408801A1 publication Critical patent/EP0408801A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge

Definitions

  • the present invention relates to a spray nozzle unit which can function satisfactory even when low pressure is applied during a period of start-up, and a spray drying apparatus equipped with the nozzle unit.
  • the rate of water to be sprayed must be equivalent to the water content of the feed liquid, which is usually in the range of 30 - 80 % by weight. Thus, the rate of water to be sprayed is also 30 - 80 % by weight of that of the feed liquid. Because of pressure nozzle characteristics, the spray nozzle pressure decreases to 10 - 80 %, depending on the liquid viscosity when this low rate of water is fed. Water droplets thus produced are likely to be so coarse that they may adhere to the surface inside the drying chamber. Subsequent spraying of the feed liquid causes dried powder to adhere to the wet surface to form deposits.
  • Figs. 6 and 7 are used to cope with this situation.
  • a plurality of spray nozzles 10 are disposed at the top of the inside of the spray drying chamber.
  • the number of spray nozzles used is limited to avoid low pressure spraying.
  • Fig. 7 illustrates an example in which a water spray nozzle 11 is disposed separately from a feed liquid spray nozzle 12.
  • the device of Fig. 6 has disadvantages of uneven liquid droplet dispersion and ununiform temperature distribution because of a longer distance between the nozzles and the very existence of unused spray nozzles.
  • plugging problems are likely to occur around the nozzles left unused when water is injected.
  • the device of Fig. 7 has disadvantage of feed liquid clogging inside the feed liquid spray nozzle since no cooling or flushing cannot be conducted through the feed nozzle.
  • the present invention provides a nozzle unit comprising a pressure nozzle for spraying feed liquid, and a cylindrical outer tube disposed around said pressure nozzle for high-speed gas blowing, characterized by the converging construction of the tip of said nozzle unit.
  • a spray drying apparatus using said nozzle unit is further provided according to this invention.
  • a gas slit for providing swirling motion in a high-­speed gas stream is desirably formed between the pressure nozzle and the cylindrical outer tube to obtain the larger spray angle of liquid droplets.
  • a gas is blown at high speed through the annulus formed between the pressure nozzle and the cylindrical outer tube so as to atomize water into very fine droplets even when only low pressure, which would otherwise produce coarse droplets, is applied in the pressure nozzle. Therefore, complete drying is carried out, and no water droplets adhere to the inside wall of the spray drying apparatus.
  • Fig. 1 illustrates a preferred embodiment of the nozzle unit of the present invention.
  • Fig. 2 shows a partially cross-sectional view of the end portion of the nozzle unit illustrated in Fig. 1.
  • a feed liquid (or water) pump 1 a Roots blower 2
  • a jacket pipe 3 an air nozzle 4
  • a feed liquid (or water) pipe 5 a feed liquid (or water) pipe 5
  • a pressure nozzle for discharging feed liquid (or water).
  • the jacket pipe 3 is disposed around the feed liquid (or water) pipe 5.
  • the end portions of the pressure nozzle 6 and the air nozzle 4 are of converging construction or so shaped that their diameters diminish as they near the tip of the nozzle as shown in Figs. 1 and 2.
  • a gas slit is provided between the pressure nozzle 6 and the air nozzle 4 or on the outer area of the pressure nozzle 6 to give swirling motion to the discharging air stream as shown in Figs. 3 (a), (b) and (c) which are a top plan view, a bottom plan view, and a side view, respectively.
  • Equation I The spraying pressure of feed liquid or water required for the pressure nozzle 6 is appropriately determined using the following Equation I and Equation II.
  • the former is the general equation expressing flow characteristics of a pressure nozzle while the latter expresses droplet diameters for a specific pressure nozzle used, which is an SX nozzle manufactured by Spraying Co. for one preferred embodiment of this invention.
  • W K 1 ⁇ D 2 ⁇ P 0.6 I where W is flow rate (kg/h), K 1 is coefficient, D is orifice diameter (mm), and P is pressure (kg/cm2).
  • D p K2 ⁇ W -0.44 . ⁇ 0.16 ⁇ D 1.52 II where W is flow rate (kg/h), D p is liquid droplet diameter ( ⁇ m), K2 is coefficient, and ⁇ is liquid viscosity (cp).
  • the air nozzle 4 disposed around the pressure nozzle 6 has an air velocity of 80 m/s or higher, preferably 100 m/s or higher, and generally has an air pressure of 0.1 kg/cm2 or higher, preferably 0.2 kg/cm2 or higher, but both air velocities and air pressures are not limited to these values. Other values beyond the above ranges may be used depending on the construction of the nozzle used.
  • Fig. 5 is a schematic illustration of an embodiment of the spray drying apparatus equipped with the spray nozzle unit of the present invention, it will be described how the spray drying apparatus is operated.
  • a feed liquid pump 1 discharges water via a feed liquid pipe 5 to a pressure nozzle 6 for spraying. Spraying of water is carried out at significantly low pressure. However, since air is blown off at high speed around the pressure nozzle 6 and swirling motion is formed in the air stream, preferably with the use of a slit 7, water is atomized into fine droplets of the desired particle size even at low pressure.
  • every water droplet is dried with hot air as referred to as A which is blown off into a drying chamber 8 of the spray drying apparatus.
  • A hot air
  • the temperature in the drying chamber 8 is maintained to be constant.
  • a feed liquid to meet a specific objective is blown off into the drying chamber 8 of the spray drying apparatus via the pressure nozzle 6 of the above nozzle unit and is dried by a hot air blown off via an inlet 9 to obtain a powder product of specified grade.13 is an outlet for exhaust gas.
  • Atomization tests for a feed liquid and water were made under the conditions shown in Table 1.
  • An SX nozzle having a hexagonal cross-section manufactured by Spraying Co. was used for a pressure nozzle 6.
  • the circumference of the nozzle tip was covered with a cylindrical pipe having a circular cross-section to obtain an annular space used for an air nozzle 4.
  • the distance between the SX nozzle and the cylindrical pipe were about 5 mm at their widest site, and about 3 mm at their closest site.
  • the inner diameter of the cylindrical pipe was 7 mm at its tip.
  • Table 1 Conventional Nozzle Nozzle of This Invention Conventional Nozzle Feed Liquid Poly vinylchloride(PVC) Water Water Orifice Dia./Core(mm) 0.787/425 0.787/425 0.787/425 Spray Pressure(kg/cm2) 23 6 6 Feed Rate (kg/h) 50 30 30 Liquid Viscosity (cp) 110 Solids Content (%) 40 Air Pressure (kg/cm2) 0.26 Air Flow Rate (kg/h) 20.5 Air Blow Speed (m/s) 127.1 Inlet Temp. (°C) 102 102 102 Outlet Temp.
  • PVC Poly vinylchloride
  • Dia./Core(mm) 0.787/425 0.787/425 0.787/425 Spray Pressure(kg/cm2) 23 6 6 6 Feed Rate (kg/h) 50 30 30 Liquid Viscosity (cp) 110 Solids Content (%) 40 Air Pressure (kg/cm2) 0.26 Air Flow Rate (kg/h) 20.5 Air Blow Speed (m/s)
  • Example 2 The same nozzle as described in Example 1 was used, but nozzle diameters were changed to obtain particles of larger sizes. A large drying chamber was used in this example.
  • Table 2 Conventional Nozzle Nozzle of This Invention Conventional Nozzle Feed Liquid Poly vinylchloride(PVC) Water Water Orifice Dia./Core(mm) 1.067/425 1.067/425 1.067/425 Spray Pressure(kg/cm2) 7 2 2 Feed Rate (kg/h) 50 30 30 Liquid Viscosity (cp) 110 Solids Content (%) 40 Air Pressure (kg/cm2) 0.26 Air Flow Rate (kg/h) 20.5 Air Blow Speed (m/s) 127.1 Inlet Temp. (°C) 102 102 102 Outlet Temp.
  • PVC Poly vinylchloride
  • Dia./Core(mm) 1.067/425 1.067/425 1.067/425 Spray Pressure(kg/cm2) 7 2 2 2 Feed Rate (kg/h) 50 30 30 Liquid Viscosity (cp) 110 Solids Content (%) 40 Air Pressure (kg/cm2) 0.26 Air Flow Rate (kg/h) 20.5 Air Blow Speed (m/s)

Abstract

A nozzle unit comprises a pressure nozzle (6) for spraying feed liquid and a cylindrical outer tube (3) disposed around said pressure nozzle for high-speed gas blowing. The tip (4) of the nozzle unit is of converging construction. When water is sprayed at low pressure in the nozzle unit, water is atomized to fine droplets.

Description

    Field of the Invention
  • The present invention relates to a spray nozzle unit which can function satisfactory even when low pressure is applied during a period of start-up, and a spray drying apparatus equipped with the nozzle unit.
    • Background of the Invention
  • In general, it is necessary that temperatures in a spray drying chamber should be stabilized in a start-up period to avoid product overheating and to provide thermal protection on equipment downstream of the spray drying chamber. Therefore, water is usually injected through the same pressure nozzle as used for a feed liquid.
  • The rate of water to be sprayed must be equivalent to the water content of the feed liquid, which is usually in the range of 30 - 80 % by weight. Thus, the rate of water to be sprayed is also 30 - 80 % by weight of that of the feed liquid. Because of pressure nozzle characteristics, the spray nozzle pressure decreases to 10 - 80 %, depending on the liquid viscosity when this low rate of water is fed. Water droplets thus produced are likely to be so coarse that they may adhere to the surface inside the drying chamber. Subsequent spraying of the feed liquid causes dried powder to adhere to the wet surface to form deposits.
  • According to the prior art, devices as shown in Figs. 6 and 7 are used to cope with this situation. In Fib. 6, a plurality of spray nozzles 10 are disposed at the top of the inside of the spray drying chamber. When water is injected for spraying, the number of spray nozzles used is limited to avoid low pressure spraying. On the other hand, Fig. 7 illustrates an example in which a water spray nozzle 11 is disposed separately from a feed liquid spray nozzle 12.
  • However, the device of Fig. 6 has disadvantages of uneven liquid droplet dispersion and ununiform temperature distribution because of a longer distance between the nozzles and the very existence of unused spray nozzles. In addition, plugging problems are likely to occur around the nozzles left unused when water is injected.
  • On the other hand, the device of Fig. 7 has disadvantage of feed liquid clogging inside the feed liquid spray nozzle since no cooling or flushing cannot be conducted through the feed nozzle.
  • In view of the foregoing disadvantages of the prior art, it is one object of the present invention to provide a spray nozzle and a spray drying apparatus using the spray nozzle, in which water is atomized into such fine particles to permit complete drying and is used to cool the spray nozzle as well to prevent plugging of feed liquid.
    • Summary of the Invention
  • In order to attain the above object, the present invention provides a nozzle unit comprising a pressure nozzle for spraying feed liquid, and a cylindrical outer tube disposed around said pressure nozzle for high-speed gas blowing, characterized by the converging construction of the tip of said nozzle unit. A spray drying apparatus using said nozzle unit is further provided according to this invention.
  • A gas slit for providing swirling motion in a high-­speed gas stream is desirably formed between the pressure nozzle and the cylindrical outer tube to obtain the larger spray angle of liquid droplets.
  • According to the present invention, a gas is blown at high speed through the annulus formed between the pressure nozzle and the cylindrical outer tube so as to atomize water into very fine droplets even when only low pressure, which would otherwise produce coarse droplets, is applied in the pressure nozzle. Therefore, complete drying is carried out, and no water droplets adhere to the inside wall of the spray drying apparatus.
    • Brief Description of the drawings
    • Fig. 1 illustrates a preferred embodiment of the nozzle unit of the present invention.
    • Fig. 2 shows a partially cross sectional view of the end portion of the nozzle unit illustrated in Fig. 1.
    • Figs. 3 (a), (b) and (c) depict an example of a slit used for the nozzle unit of the invention.
    • Figs. 3 (a), (b) and (c) are a top plan view, a bottom plan view, and a side view, respectively.
    • Fig. 5 is a schematic illustration of an embodiment of the spray drying apparatus equipped with the spray nozzle unit of the present invention.
    • Figs. 6 and 7 show conventional nozzle units.
    Detailed Description of the Invention
  • In the following examples are described preferred embodiments to illustrate the present invention with particular reference to the drawings. However, it is to be understood that the invention is not intended to be limited to the specific embodiments.
  • Fig. 1 illustrates a preferred embodiment of the nozzle unit of the present invention. Fig. 2 shows a partially cross-sectional view of the end portion of the nozzle unit illustrated in Fig. 1.
  • Referring now to the drawings, there are shown a feed liquid (or water) pump 1, a Roots blower 2, a jacket pipe 3, an air nozzle 4, a feed liquid (or water) pipe 5, and a pressure nozzle for discharging feed liquid (or water). The jacket pipe 3 is disposed around the feed liquid (or water) pipe 5. The end portions of the pressure nozzle 6 and the air nozzle 4 are of converging construction or so shaped that their diameters diminish as they near the tip of the nozzle as shown in Figs. 1 and 2.
  • For the purpose of increasing spray angles of feed liquid or water, it is preferable that a gas slit is provided between the pressure nozzle 6 and the air nozzle 4 or on the outer area of the pressure nozzle 6 to give swirling motion to the discharging air stream as shown in Figs. 3 (a), (b) and (c) which are a top plan view, a bottom plan view, and a side view, respectively.
  • The spraying pressure of feed liquid or water required for the pressure nozzle 6 is appropriately determined using the following Equation I and Equation II. The former is the general equation expressing flow characteristics of a pressure nozzle while the latter expresses droplet diameters for a specific pressure nozzle used, which is an SX nozzle manufactured by Spraying Co. for one preferred embodiment of this invention.
    W = K ₁ · D ² · P 0.6      I
    where W is flow rate (kg/h), K ₁ is coefficient, D is orifice diameter (mm), and P is pressure (kg/cm²).
    D p = K₂ · W -0.44 . µ0.16 · D1.52      II
    where W is flow rate (kg/h), D p is liquid droplet diameter (µm), K₂ is coefficient, and µ is liquid viscosity (cp).
  • The air nozzle 4 disposed around the pressure nozzle 6 has an air velocity of 80 m/s or higher, preferably 100 m/s or higher, and generally has an air pressure of 0.1 kg/cm² or higher, preferably 0.2 kg/cm² or higher, but both air velocities and air pressures are not limited to these values. Other values beyond the above ranges may be used depending on the construction of the nozzle used.
  • Referring now to Fig. 5 which is a schematic illustration of an embodiment of the spray drying apparatus equipped with the spray nozzle unit of the present invention, it will be described how the spray drying apparatus is operated.
  • For start-up, a feed liquid pump 1 discharges water via a feed liquid pipe 5 to a pressure nozzle 6 for spraying. Spraying of water is carried out at significantly low pressure. However, since air is blown off at high speed around the pressure nozzle 6 and swirling motion is formed in the air stream, preferably with the use of a slit 7, water is atomized into fine droplets of the desired particle size even at low pressure.
  • With fine water droplets of the desired particle size, every water droplet is dried with hot air as referred to as A which is blown off into a drying chamber 8 of the spray drying apparatus. Thus, no undried water is present in the drying chamber 8 and almost no temperature distribution is found in the chamber. In other words, the temperature in the drying chamber 8 is maintained to be constant.
  • Then, a feed liquid to meet a specific objective is blown off into the drying chamber 8 of the spray drying apparatus via the pressure nozzle 6 of the above nozzle unit and is dried by a hot air blown off via an inlet 9 to obtain a powder product of specified grade.13 is an outlet for exhaust gas.
  • When the feed liquid is actually sprayed using this nozzle unit, it is desirable to let a little air flow through the air nozzle 4 because the air can cool the nozzle unit for preventing feed liquid plugging.
  • Now the present invention will be described in detail in connection with the following examples:
    • Example 1
  • Atomization tests for a feed liquid and water were made under the conditions shown in Table 1. An SX nozzle having a hexagonal cross-section manufactured by Spraying Co. was used for a pressure nozzle 6. The circumference of the nozzle tip was covered with a cylindrical pipe having a circular cross-section to obtain an annular space used for an air nozzle 4. The distance between the SX nozzle and the cylindrical pipe were about 5 mm at their widest site, and about 3 mm at their closest site. The inner diameter of the cylindrical pipe was 7 mm at its tip.
  • The results of these tests are shown in Table 1 below. Table 1
    Conventional Nozzle Nozzle of This Invention Conventional Nozzle
    Feed Liquid Poly vinylchloride(PVC) Water Water
    Orifice Dia./Core(mm) 0.787/425 0.787/425 0.787/425
    Spray Pressure(kg/cm²) 23 6 6
    Feed Rate (kg/h) 50 30 30
    Liquid Viscosity (cp) 110
    Solids Content (%) 40
    Air Pressure (kg/cm²) 0.26
    Air Flow Rate (kg/h) 20.5
    Air Blow Speed (m/s) 127.1
    Inlet Temp. (°C) 102 102 102
    Outlet Temp. (°C) 55 55 58
    Particle Size (µm) 91 40 * 120 *
    Spray Angle (deg.) about 15 about 60
    Dryness Good Good Poor
    No Wet Material adhered No Wet Material adhered Wet Material adhered to dry chamber cone section
    * denotes droplet size.
    The pressure nozzle used was an SX nozzle manufactured by Spraying Co.
  • In addition, the test was made for the case in which swirling motion was provided in the high-speed air stream in the nozzle unit of the present invention. The results are shown below.
    Nozzle According to This Invention
    Average Droplet Diameter (µm) 40
    Spray Angle (Deg.) Approx. 30
    • Example 2
  • The same nozzle as described in Example 1 was used, but nozzle diameters were changed to obtain particles of larger sizes. A large drying chamber was used in this example.
  • The results of these tests are shown in Table 2 below. Table 2
    Conventional Nozzle Nozzle of This Invention Conventional Nozzle
    Feed Liquid Poly vinylchloride(PVC) Water Water
    Orifice Dia./Core(mm) 1.067/425 1.067/425 1.067/425
    Spray Pressure(kg/cm²) 7 2 2
    Feed Rate (kg/h) 50 30 30
    Liquid Viscosity (cp) 110
    Solids Content (%) 40
    Air Pressure (kg/cm²) 0.26
    Air Flow Rate (kg/h) 20.5
    Air Blow Speed (m/s) 127.1
    Inlet Temp. (°C) 102 102 102
    Outlet Temp. (°C) 55 55 65
    Particle Size (µm) 150 60 * 640 *
    Abnormal spraying
    Spray Angle (deg.) about 15 about 60
    Dryness Good Good Poor
    No Wet Material adhered Wet Material adhered to dry chamber cone section
    * denotes droplet size.
  • As clearly seen from the above results, water is atomized to give fine water droplets with the nozzle according to the present invention. Dryness in the spray drying apparatus is improved since spray angles increase when swirling motion is provided in air streams discharging from nozzles.
  • The effects of the present invention are listed in the following:
    • 1) Even when water is sprayed at low pressure in the spray nozzle of the present invention, water is atomized to fine droplets which is then completely evaporated.
    • 2) Feed liquid plugging can be prevented by the cooling of the spray nozzle unit, and
    • 3) in a spray drying apparatus equipped with this spray nozzle unit, the spraying of a feed liquid can be performed effectively and stably even after water is sprayed at low pressure.

Claims (3)

1. A nozzle unit comprising a pressure nozzle for spraying a feed liquid and a cylindrical outer tube disposed around said pressure nozzle for blowing gas at high-speed, the tip of said nozzle unit being of converging construction.
2. A nozzle unit in accordance with claim 1, in which there is formed a gas slit for providing swirling motion in a high-speed gas stream between the pressure nozzle and the cylindrical outer tube.
3. A spray drying apparatus comprising a nozzle unit and a drying chamber, in which
1) the nozzle unit comprising a pressure nozzle for spraying a feed liquid and a cylindrical outer tube disposed around said pressure nozzle for blowing gas at high-speed, the tip of said nozzle unit being of converging construction, is mounted on the top section of said drying chamber, and
2) there is provided an inlet for hot air blown off into said drying chamber and an outlet for gas exhausted from said drying chamber.
EP19890113481 1988-01-29 1989-07-21 Spray drying apparatus Expired - Lifetime EP0408801B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1989624848 DE68924848T2 (en) 1989-07-21 1989-07-21 Spray drying device.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63019008A JP2524379B2 (en) 1988-01-29 1988-01-29 Nozzle device and spray dryer device incorporating it

Publications (2)

Publication Number Publication Date
EP0408801A1 true EP0408801A1 (en) 1991-01-23
EP0408801B1 EP0408801B1 (en) 1995-11-15

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7575761B2 (en) 2000-06-30 2009-08-18 Novartis Pharma Ag Spray drying process control of drying kinetics
WO2012116697A1 (en) 2011-02-28 2012-09-07 Gea Process Engineering A/S External mixing pressurized two-fluid nozzle and a spray drying method
DE102011120717A1 (en) * 2011-12-12 2013-06-13 Sm-Klebetechnik Vertriebs Gmbh Fluid nozzle for application of highly viscous materials e.g. high viscosity adhesive, has deflector metal sheet such as lock washer provided in gas outlet which is arranged around substance outlet
US8524279B2 (en) 2001-11-01 2013-09-03 Novartis Ag Spray drying methods and related compositions
US9700529B2 (en) 2002-05-03 2017-07-11 Nektar Therapeutics Particulate materials
US10946305B2 (en) 2014-07-04 2021-03-16 Centre National De La Recherche Scientifique (C.N.R.S) Method for producing cocrystals by means of flash evaporation
WO2024059764A1 (en) * 2022-09-15 2024-03-21 Velico Medical, Inc. Disposable nozzle for use with spray drying system
WO2024059771A1 (en) * 2022-09-15 2024-03-21 Velico Medical, Inc. Two-phase delivery of plasma

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2524379B2 (en) * 1988-01-29 1996-08-14 大川原化工機株式会社 Nozzle device and spray dryer device incorporating it
US5499768A (en) * 1989-05-31 1996-03-19 Ohkawara Kakohki Co., Ltd. Spray nozzle unit
US6051256A (en) 1994-03-07 2000-04-18 Inhale Therapeutic Systems Dispersible macromolecule compositions and methods for their preparation and use
US20030203036A1 (en) 2000-03-17 2003-10-30 Gordon Marc S. Systems and processes for spray drying hydrophobic drugs with hydrophilic excipients
GB0216562D0 (en) 2002-04-25 2002-08-28 Bradford Particle Design Ltd Particulate materials
MXPA05007154A (en) 2002-12-30 2005-09-21 Nektar Therapeutics Prefilming atomizer.
WO2011127456A2 (en) 2010-04-09 2011-10-13 Pacira Pharmaceuticals, Inc. Method for formulating large diameter synthetic membrane vesicles
US10569187B2 (en) 2011-02-28 2020-02-25 Gea Process Engineering A/S External mixing pressurized two-fluid nozzle and a spray drying method
DE102011078508B4 (en) * 2011-07-01 2017-11-09 Lechler Gmbh full cone nozzle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR938920A (en) * 1946-12-31 1948-10-28 Spray dryer device
US3790086A (en) * 1971-05-24 1974-02-05 Hitachi Ltd Atomizing nozzle
US4335677A (en) * 1979-10-25 1982-06-22 Sumitomo Light Metal Industries, Ltd. Coating of the inner surface of tubes
JPH01194901A (en) * 1988-01-29 1989-08-04 Oogawara Kakoki Kk Nozzle means and spray drier equipped therewith

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR938920A (en) * 1946-12-31 1948-10-28 Spray dryer device
US3790086A (en) * 1971-05-24 1974-02-05 Hitachi Ltd Atomizing nozzle
US4335677A (en) * 1979-10-25 1982-06-22 Sumitomo Light Metal Industries, Ltd. Coating of the inner surface of tubes
JPH01194901A (en) * 1988-01-29 1989-08-04 Oogawara Kakoki Kk Nozzle means and spray drier equipped therewith

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7575761B2 (en) 2000-06-30 2009-08-18 Novartis Pharma Ag Spray drying process control of drying kinetics
US8524279B2 (en) 2001-11-01 2013-09-03 Novartis Ag Spray drying methods and related compositions
US9700529B2 (en) 2002-05-03 2017-07-11 Nektar Therapeutics Particulate materials
US10188614B2 (en) 2002-05-03 2019-01-29 Nektar Therapeutics Particulate materials
US10945972B2 (en) 2002-05-03 2021-03-16 Nektar Therapeutics Particulate materials
WO2012116697A1 (en) 2011-02-28 2012-09-07 Gea Process Engineering A/S External mixing pressurized two-fluid nozzle and a spray drying method
DE102011120717A1 (en) * 2011-12-12 2013-06-13 Sm-Klebetechnik Vertriebs Gmbh Fluid nozzle for application of highly viscous materials e.g. high viscosity adhesive, has deflector metal sheet such as lock washer provided in gas outlet which is arranged around substance outlet
US10946305B2 (en) 2014-07-04 2021-03-16 Centre National De La Recherche Scientifique (C.N.R.S) Method for producing cocrystals by means of flash evaporation
WO2024059764A1 (en) * 2022-09-15 2024-03-21 Velico Medical, Inc. Disposable nozzle for use with spray drying system
WO2024059771A1 (en) * 2022-09-15 2024-03-21 Velico Medical, Inc. Two-phase delivery of plasma

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EP0408801B1 (en) 1995-11-15
JP2524379B2 (en) 1996-08-14
JPH01194901A (en) 1989-08-04

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