WO2020031227A1 - Spray drying device and spray drying method - Google Patents
Spray drying device and spray drying method Download PDFInfo
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- WO2020031227A1 WO2020031227A1 PCT/JP2018/029387 JP2018029387W WO2020031227A1 WO 2020031227 A1 WO2020031227 A1 WO 2020031227A1 JP 2018029387 W JP2018029387 W JP 2018029387W WO 2020031227 A1 WO2020031227 A1 WO 2020031227A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
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- 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
- F26B3/10—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 carrying the materials or objects to be dried with it
- F26B3/12—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 carrying the materials or objects to be dried with it in the form of a spray, i.e. sprayed or dispersed emulsions or suspensions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Mechanical Engineering (AREA)
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- Drying Of Solid Materials (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
[Problem] To provide a spray drying device and a spray drying method that can recover dried powder, at a high recovery rate, in a dried powder recovery unit provided under a spray drying chamber. [Solution] A spray drying device and a spray drying method, said device being characterized by comprising: a spraying means for spraying a raw liquid into a drying chamber; a drying means for drying the raw liquid and obtaining a dried powder by bringing a high temperature gas into contact with the jet flow from the spraying means; a rotational force applying means for applying a rotational force to the dried powder contained in a rotational flow comprising the jet flow from the spraying means and the high temperature gas flow; and a recovering means that is provided under the drying chamber and that is for recovering the dried powder.
Description
本発明は、乾燥粉体を製造する噴霧乾燥装置及び噴霧乾燥方法に関するものである。
The present invention relates to a spray drying apparatus and a spray drying method for producing a dry powder.
物質が溶解した溶液又は物質が分散したスラリー等の原料液に含まれる溶媒を、例えば、熱風により瞬間乾燥することで乾燥粉体を製造する噴霧乾燥装置は、食料品、医薬品、金属材料、工業用材料等の製造分野において多用されている。一般的な噴霧乾燥装置は、少なくとも、原料液を噴霧する噴霧手段と、噴霧した原料液に対して熱風等の高温ガスを接触させることにより、原料液に含まれる溶媒を蒸発させることで乾燥粉体を生成する乾燥手段と、生成した乾燥粉体を捕集する捕集手段とを備える。
A spray drying apparatus that produces a dry powder by instantaneously drying a solvent contained in a raw material liquid such as a solution in which a substance is dissolved or a slurry in which the substance is dispersed, for example, by hot air is used for foodstuffs, pharmaceuticals, metal materials, and industrial products. It is widely used in the field of manufacturing materials for use. A general spray drying apparatus includes a spraying means for spraying a raw material liquid and a hot gas such as hot air that is in contact with the sprayed raw material liquid to evaporate a solvent contained in the raw material liquid. A drying unit for generating a body and a collecting unit for collecting the generated dry powder are provided.
図９に示すように、通常の噴霧乾燥装置１５においては、噴霧乾燥室１００’の天面の略中央部分に噴霧手段２０’が設けられている。噴霧手段２０’の噴霧盤２００’は、原料液供給手段３０’から供給された原料液を高速回転させて噴霧乾燥室１００’内に噴霧する。噴霧盤２００’からの噴流に対して乾燥手段４０’からは高温ガスが連続供給されており、噴霧盤２００’からの噴流と高温ガスの流れとは図中点線で示すように、原料液に含まれる溶媒の蒸発を伴いながら旋回流を形成し、その旋回力を減衰、旋回径を小さくしながら噴霧乾燥室１００’下部に降下する。
よ う As shown in FIG. 9, in the usual spray-drying device 15, a spraying means 20 'is provided at substantially the center of the top surface of the spray-drying chamber 100'. The spraying plate 200 'of the spraying means 20' rotates the raw material liquid supplied from the raw material liquid supplying means 30 'at a high speed and sprays the raw material liquid into the spray drying chamber 100'. The high-temperature gas is continuously supplied from the drying means 40 ′ to the jet from the spray plate 200 ′, and the jet and the flow of the high-temperature gas from the spray plate 200 ′ A swirling flow is formed with the evaporation of the contained solvent, the swirling force is attenuated, and the swirling flow descends to the lower part of the spray drying chamber 100 'while reducing the swirling diameter.
旋回流を形成しながら降下した乾燥粉体は、噴霧乾燥室１００’下部に設けられた回収手段としての第１乾燥粉体回収部８００’において回収されることになる。ところで、第１乾燥粉体回収部８００’における乾燥粉体の回収とともに、噴霧乾燥室１００’内部に導入された高温ガスを排気するための排気管５０４’にサイクロン型、バグフィルタ型の集塵装置５０２’を設け、粒径が小さく、排気流に混入しやすい乾燥粉体をキャップ部材５０６’下部矢印Ｄ方向から捕集し、集塵装置５０２’に接続された第２乾燥粉体回収部８０２’にて回収する形態も知られている（例えば、特許文献１参照）。
The dried powder falling while forming a swirling flow is collected in a first dry powder collecting unit 800 'as a collecting means provided in a lower part of the spray drying chamber 100'. By the way, while collecting the dry powder in the first dry powder recovery section 800 ', a cyclone-type or bag-filter-type dust collection is provided in an exhaust pipe 504' for exhausting the high-temperature gas introduced into the spray-drying chamber 100 '. An apparatus 502 'is provided to collect the dry powder having a small particle diameter and easily mixed into the exhaust stream from the direction of arrow D below the cap member 506', and a second dry powder recovery unit connected to the dust collecting apparatus 502 '. A form of recovery at 802 'is also known (for example, see Patent Document 1).
集塵装置５０２’に接続された第２乾燥粉体回収部８０２’で回収される乾燥粉体は、第１乾燥粉体回収部８００’において回収される乾燥粉体の粒径よりも小さいものであり、例えば、セラミックス、金属等の造粒の様な、高い流動性が求められる用途においては、製品価値に乏しいものである。上記用途等の第２乾燥粉体回収部８０２’において回収された乾燥粉体は、廃棄又は再度所定の溶媒に溶解又は分散させられ、再利用されることが多い。よって、第２乾燥粉体回収部８０２’において回収される乾燥粉体の量が多くなると、歩留まり率の低下に伴う生産性の低下を招く恐れがあった。
The dry powder recovered in the second dry powder recovery unit 802 'connected to the dust collector 502' is smaller than the particle diameter of the dry powder recovered in the first dry powder recovery unit 800 '. In applications where high fluidity is required, such as granulation of ceramics and metals, the product value is poor. The dry powder recovered in the second dry powder recovery unit 802 'for the above-mentioned use or the like is often discarded or dissolved or dispersed in a predetermined solvent and reused. Therefore, when the amount of the dry powder recovered in the second dry powder recovery unit 802 'is large, there is a possibility that the productivity may be reduced due to a decrease in the yield rate.
本発明はこのような実状に鑑みてなされたものであり、本発明の課題は、噴霧乾燥室下部に設けられた乾燥粉体回収部において、高い回収率で乾燥粉体を回収することが可能な噴霧乾燥装置及び噴霧乾燥方法を提供することである。
The present invention has been made in view of such circumstances, and it is an object of the present invention to be able to recover a dry powder at a high recovery rate in a dry powder recovery unit provided at a lower part of a spray drying chamber. It is an object of the present invention to provide a spray drying apparatus and a spray drying method.
本願発明者は、上記課題を解決するため鋭意研究した結果、噴霧手段からの噴流と高温ガスの流れとからなる旋回流に含まれる乾燥粉体に対して旋回力を付与することによって、上記課題を解決することができることを見出し、本発明の完成に至った。
The inventor of the present application has conducted intensive studies to solve the above-mentioned problems, and as a result, by applying a swirling force to a dry powder contained in a swirling flow composed of a jet from a spraying unit and a flow of a high-temperature gas, the above-described problems have been solved. Can be solved, and the present invention has been completed.
すなわち、本発明の第１の発明によれば、原料液を乾燥室内に噴霧する噴霧手段と、前記噴霧手段からの噴流に高温ガスを接触させることにより前記原料液を乾燥し、乾燥粉体を得る乾燥手段と、前記噴霧手段からの噴流と前記高温ガスの流れとからなる旋回流に含まれる前記乾燥粉体に対して旋回力を付与する旋回力付与手段と、前記乾燥室下部に設けられ、乾燥した前記乾燥粉体を回収する回収手段とを備えることを特徴とする噴霧乾燥装置が提供される。
That is, according to the first aspect of the present invention, the spraying means for spraying the raw material liquid into the drying chamber, and the raw material liquid is dried by contacting the high-temperature gas with the jet from the spraying means, and the dried powder is dried. Drying means for obtaining, a swirling force applying means for applying a swirling force to the dry powder contained in the swirling flow composed of the jet flow from the spraying means and the flow of the high-temperature gas, and provided at a lower portion of the drying chamber. And a recovery means for recovering the dried dry powder.
また、本発明の第２の発明によれば、第１の発明において、前記旋回流は、渦巻き状に乾燥室下方に移動する流れであって、前記旋回力付与手段は、前記旋回力を乾燥室内壁側に向けて付与することを特徴とする噴霧乾燥装置が提供される。
Further, according to the second invention of the present invention, in the first invention, the swirling flow is a flow that moves in a spiral shape below the drying chamber, and the swirling force applying unit is configured to dry the swirling force. A spray-drying device is provided, which is applied toward an indoor wall.
また、本発明の第３の発明によれば、第２の発明において、前記旋回力付与手段は、所定の駆動力により回転する羽根部材を備えることを特徴とする噴霧乾燥装置が提供される。
According to a third aspect of the present invention, there is provided the spray drying apparatus according to the second aspect, wherein the turning force applying means includes a blade member rotated by a predetermined driving force.
また、本発明の第４の発明によれば、第３の発明において、前記所定の駆動力は、エアモータ、電動機、又は油圧モータの何れかであることを特徴とする噴霧乾燥装置が提供される。
According to a fourth aspect of the present invention, there is provided the spray drying apparatus according to the third aspect, wherein the predetermined driving force is any one of an air motor, an electric motor, and a hydraulic motor. .
また、本発明の第５の発明によれば、第３の発明において、前記所定の駆動力は、コンプレッサ、ブロワ、又はガスボンベから供給された圧縮空気又は不活性ガスに基づくものであることを特徴とする噴霧乾燥装置が提供される。
According to a fifth aspect of the present invention, in the third aspect, the predetermined driving force is based on compressed air or an inert gas supplied from a compressor, a blower, or a gas cylinder. Is provided.
また、本発明の第６に発明によれば、第２の発明において、前記旋回力付与手段は、前記乾燥室内壁に沿って気体を供給する気体供給部材であることを特徴とする噴霧乾燥装置が提供される。
According to a sixth aspect of the present invention, in the second aspect of the invention, the swirling force applying means is a gas supply member for supplying gas along the inner wall of the drying chamber. Is provided.
また、本発明の第７の発明によれば、第６の発明において、前記気体は空気又は不活性ガスであることを特徴とする噴霧乾燥装置が提供される。
According to a seventh aspect of the present invention, there is provided the spray drying apparatus according to the sixth aspect, wherein the gas is air or an inert gas.
また、本発明の第８の発明によれば、原料液を乾燥室内に噴霧する噴霧ステップと、前記噴霧ステップにおける噴流に高温ガスを接触させることにより前記原料液を乾燥し、乾燥粉体を得る乾燥ステップと、前記噴霧ステップにおける噴流と前記高温ガスの流れとからなる旋回流に含まれる前記乾燥粉体に対して旋回力を付与する旋回力付与ステップと、前記乾燥室下部において、乾燥した前記乾燥粉体を回収する回収ステップとを備えることを特徴とする噴霧乾燥方法が提供される。
Further, according to the eighth aspect of the present invention, a spraying step of spraying the raw material liquid into the drying chamber, and the raw material liquid is dried by bringing a high-temperature gas into contact with the jet in the spraying step to obtain a dry powder. A drying step, a swirling force applying step of applying a swirling force to the dry powder contained in the swirling flow composed of the jet and the high-temperature gas flow in the spraying step, And a collecting step of collecting the dried powder.
また、本発明の第９の発明によれば、第８の発明において、前記旋回流は、渦巻き状に乾燥室下方に移動する流れであって、前記旋回力付与ステップでは、前記旋回力を乾燥室内壁側に向けて付与することを特徴とする噴霧乾燥方法が提供される。
According to a ninth aspect of the present invention, in the eighth aspect, the swirling flow is a flow that moves in a spiral shape below the drying chamber, and in the swirling force applying step, the swirling force is dried. A spray drying method characterized in that the spray drying method is applied toward an indoor wall.
また、本発明の第１０の発明によれば、第９の発明において、前記旋回力付与ステップでは、所定の駆動力により回転する羽根部材を用いることを特徴とする噴霧乾燥方法が提供される。
According to a tenth aspect of the present invention, there is provided the spray drying method according to the ninth aspect, wherein in the turning force applying step, a blade member rotated by a predetermined driving force is used.
また、本発明の第１１の発明によれば、第１０の発明において、前記所定の駆動力は、エアモータ、電動機、又は油圧モータの何れかであることを特徴とする噴霧乾燥方法が提供される。
According to an eleventh aspect of the present invention, there is provided the spray drying method according to the tenth aspect, wherein the predetermined driving force is any one of an air motor, an electric motor, and a hydraulic motor. .
また、本発明の第１２の発明によれば、第１０の発明において、前記所定の駆動力は、コンプレッサ、ブロワ、又はガスボンベから供給された圧縮空気又は不活性ガスに基づくものであることを特徴とする噴霧乾燥方法が提供される。
According to a twelfth aspect of the present invention, in the tenth aspect, the predetermined driving force is based on compressed air or an inert gas supplied from a compressor, a blower, or a gas cylinder. Spray drying method is provided.
また、本発明の第１３の発明によれば、第９の発明において、前記旋回力付与ステップでは、前記乾燥室内壁に沿って気体を供給する気体供給部材を用いることを特徴とする噴霧乾燥方法が提供される。
According to a thirteenth aspect of the present invention, in the ninth aspect of the present invention, in the ninth aspect, in the turning force applying step, a gas supply member that supplies gas along the inner wall of the drying chamber is used. Is provided.
また、本発明の第１４の発明によれば、第１３の発明において、前記気体は空気又は不活性ガスであることを特徴とする噴霧乾燥方法が提供される。
According to a fourteenth aspect of the present invention, there is provided the spray drying method according to the thirteenth aspect, wherein the gas is air or an inert gas.
本発明によれば、噴霧乾燥室下部に設けられた乾燥粉体回収部において、高い回収率で乾燥粉体を回収することが可能な噴霧乾燥装置及び噴霧乾燥方法を提供することができる。
According to the present invention, it is possible to provide a spray-drying apparatus and a spray-drying method capable of collecting a dry powder at a high recovery rate in a dry-powder collecting section provided in a lower part of a spray-drying chamber.
以下、本発明の実施形態について図面を参照して説明する。なお、本発明は以下の記述に限定されるものではなく、本発明の要旨を逸脱しない範囲において適宜変更可能である。また、本発明の説明において、同一構成とすることができる手段・部材については同一の符号を付してその説明を省略することがある。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following description, and can be appropriately modified without departing from the gist of the present invention. In the description of the present invention, means and members having the same configuration are denoted by the same reference numerals and description thereof may be omitted.
図１は、本発明の実施形態に係る噴霧乾燥装置１０の構成を示す説明図である。噴霧乾燥装置１０は、物質が溶解した溶液又は物質が分散したスラリー等の原料液を乾燥することにより、微粒子状の乾燥粉体を得ることが可能な装置である。このような噴霧乾燥装置１０は、噴霧盤２００を有し噴霧乾燥室１００内に原料液を噴霧する噴霧手段２０と、噴霧手段２０に原料液を供給する原料液供給手段３０と、噴霧乾燥室１００内に高温ガスを供給し原料液を乾燥させる乾燥手段４０と、噴霧乾燥室１００内に供給された高温ガスを排気すると共に小粒径の乾燥粉体を捕集する排気・捕集手段５０と、噴霧手段からの噴流と高温ガスの流れとからなる旋回流に含まれる乾燥粉体に対して旋回力を付与する旋回力付与手段６０と、旋回力付与手段６０が備える旋回力付与部材６００にその駆動力となる気体を供給する気体供給手段７０と、乾燥粉体を回収する回収手段８０とを備える。
FIG. 1 is an explanatory diagram showing a configuration of a spray drying apparatus 10 according to an embodiment of the present invention. The spray-drying device 10 is a device capable of obtaining a fine-particle dry powder by drying a raw material liquid such as a solution in which a substance is dissolved or a slurry in which the substance is dispersed. Such a spray drying apparatus 10 includes a spraying means 20 having a spraying board 200 for spraying a raw material liquid into a spray drying chamber 100, a raw material liquid supply means 30 for supplying the raw material liquid to the spraying means 20, a spray drying chamber A drying unit 40 for supplying a high-temperature gas to the inside of the spray drying chamber 100 to dry the raw material liquid; and an exhaust / collecting unit 50 for exhausting the high-temperature gas supplied into the spray drying chamber 100 and collecting a small-sized dry powder. A swirling force applying means 60 for applying a swirling force to the dry powder contained in the swirling flow composed of the jet flow from the spraying means and the high-temperature gas flow, and a swirling force applying member 600 provided in the swirling force applying means 60 A gas supply means 70 for supplying a gas to be used as a driving force thereto, and a collecting means 80 for collecting a dry powder.
噴霧乾燥室１００は、物質が溶解した溶液又は物質が分散したスラリー等の原料液を例えば、熱風といった高温ガスと接触させることにより乾燥を促すための容器である。噴霧乾燥室１００は、例えば、ステンレス等の鋼材で形成することができ、下方に向かって円錐状に縮径する略円筒形状の中空体として構成することができる。噴霧盤２００からの噴流と乾燥手段４０から供給された高温ガスの流れとは図中点線で示すように、原料液に含まれる溶媒の蒸発を伴いながら旋回流を形成し、その旋回力を減衰、旋回径を縮小しながら最終的には矢印Ｃで示す噴霧乾燥室１００下部に降下することで、開口部１０４を介して設けられた回収手段８０としての第１乾燥粉体回収部８００において回収される。第１乾燥粉体回収部８００としては、例えば、円錐形や四角錘形のホッパーや、トレイ、袋体といった種々の回収手段を適用することができ、ヘルール、バンド、クランプ、フランジ等の接続手段を介して噴霧乾燥室１００と着脱自在に接続することが可能であれば、その種類、使用に制限はない。また、スクリューフィーダー、空気輸送等の何れかの手段によって、乾燥粉体をサイロ等の貯蔵施設に輸送する形態としてもかまわない。なお、噴霧乾燥室１００の外壁１０２に衝撃・振動を与えることで乾燥室内壁、円錐部に堆積又は付着した乾燥粉体を強制流動させ、第１乾燥粉体回収部８００に導く、ノッカー、バイブレータ等の衝撃・振動付与手段１０８を設けてもよい。
The spray drying chamber 100 is a container for promoting drying by bringing a raw material liquid such as a solution in which a substance is dissolved or a slurry in which a substance is dispersed into contact with a high-temperature gas such as hot air. The spray-drying chamber 100 can be formed of, for example, a steel material such as stainless steel, and can be configured as a substantially cylindrical hollow body whose diameter decreases conically downward. As shown by the dotted line in the figure, the jet from the spraying plate 200 and the flow of the high-temperature gas supplied from the drying means 40 form a swirling flow while evaporating the solvent contained in the raw material liquid, and attenuate the swirling force. Then, while reducing the swirling diameter and finally descending to the lower part of the spray drying chamber 100 indicated by the arrow C, the first dry powder collecting unit 800 as the collecting means 80 provided through the opening 104 collects the powder. Is done. As the first dry powder collecting section 800, for example, various collecting means such as a conical or quadrangular pyramid-shaped hopper, a tray, and a bag can be applied, and connecting means such as a ferrule, a band, a clamp, and a flange can be used. The type and use are not limited as long as it can be detachably connected to the spray-drying chamber 100 via the. Further, the dry powder may be transported to a storage facility such as a silo by any means such as a screw feeder or pneumatic transport. A knocker or a vibrator is applied by forcing the dry powder deposited or adhered to the inner wall of the drying chamber or the conical portion to flow by applying an impact or vibration to the outer wall 102 of the spray drying chamber 100 and guiding the dried powder to the first dry powder recovery section 800. And the like, may be provided.
噴霧手段２０は、噴霧乾燥室１００の天面部１０６の略中央部に設けられ、噴霧盤２００の高速回転に伴う遠心力により原料液を径方向外側に噴霧する。噴霧手段２０は、噴霧盤２００を高速回転させるための図示せぬモータ、回転軸等を備えるとともに、噴霧盤２００に対して原料液を供給する原料液供給管３０４が接続されている。噴霧盤２００としては、特に限定はされないが、ピン型、ケスナー型、ベーン型、スリットベーン型といった種々の形状のものを用いることができる。これらは、乾燥粉体として得られる粒子のサイズ、均一性、又は噴霧する原液の物理・化学特性等の種々の事情を考慮し適宜選択すればよい。なお、噴霧手段２０としては、噴霧盤のみに限定されることはなく、例えば、加圧ノズル、二流体ノズル、四流体ノズル、超音波ノズル等も使用することができる。
The spraying means 20 is provided substantially at the center of the top surface 106 of the spray drying chamber 100, and sprays the raw material liquid radially outward by centrifugal force caused by high-speed rotation of the spraying plate 200. The spraying means 20 includes a motor, a rotating shaft, and the like (not shown) for rotating the spraying board 200 at high speed, and is connected to a raw material liquid supply pipe 304 for supplying the raw material liquid to the spraying board 200. The spraying device 200 is not particularly limited, but various shapes such as a pin type, a Kessner type, a vane type, and a slit vane type can be used. These may be appropriately selected in consideration of various circumstances such as the size and uniformity of the particles obtained as a dry powder, and the physical and chemical properties of the stock solution to be sprayed. In addition, the spraying means 20 is not limited to the spraying board alone, and for example, a pressure nozzle, a two-fluid nozzle, a four-fluid nozzle, an ultrasonic nozzle, or the like can also be used.
原料供給手段３０は、原料液を貯留する原料液タンク３００と、ポンプ３０２とが原料液供給管３０４により接続されて構成されている。原料液供給管３０４は噴霧手段２０の図示せぬ原料液供給管と接続されており、原料液タンク３００に貯留された原料液は、ポンプ３０２の駆動により噴霧手段２０の噴霧盤２００に供給される。なお、本発明に係る原料液に含まれる原料としては、食料品、医薬品、金属材料、工業用材料等の分野における各種原料を用いることができるが、例えば、炭化ケイ素、窒化ケイ素、窒化アルミニウム、ジルコニア、アルミナ、ムライト、フェライト、フォルステライト、チタン酸バリウム、チタン酸ジルコン酸鉛、ステアタイト、ジルコンといった、所謂、ファインセラミックス原料、ガラス、セメント等のセラミックス原料等を適当な溶媒に溶解して溶液状としたもの又は溶媒に分散することでスラリー状としたものを原料液として用いることができる。
The raw material supply means 30 is configured by connecting a raw material liquid tank 300 for storing a raw material liquid and a pump 302 by a raw material liquid supply pipe 304. The raw material liquid supply pipe 304 is connected to a raw material liquid supply pipe (not shown) of the spraying means 20, and the raw material liquid stored in the raw material liquid tank 300 is supplied to the spraying plate 200 of the spraying means 20 by driving the pump 302. You. In addition, as the raw material contained in the raw material liquid according to the present invention, various raw materials in the fields of foodstuffs, pharmaceuticals, metal materials, industrial materials, and the like can be used, for example, silicon carbide, silicon nitride, aluminum nitride, So-called fine ceramics raw materials, such as zirconia, alumina, mullite, ferrite, forsterite, barium titanate, lead zirconate titanate, steatite, zircon, etc. It can be used as a raw material liquid in the form of a slurry or by dispersing in a solvent.
乾燥手段４０は、フィルタ４００と、ブロワ４０２と、ヒータ４０４とが高温ガス供給管４０６により接続されて構成されている。乾燥手段４０は、フィルタ４００を介してブロワ４０２で取り込んだ空気をヒータ４０４で加温し、高温ガス供給管４０６を通じて噴霧乾燥室１００内に熱風として導入する。なお、ガス供給源としては、コンプレッサを介した圧縮空気、ガスボンベ等を介した窒素、アルゴンガス等の不活性ガスも使用することが可能である。
(4) The drying means 40 includes a filter 400, a blower 402, and a heater 404 connected by a high-temperature gas supply pipe 406. The drying unit 40 heats the air taken in by the blower 402 via the filter 400 with the heater 404, and introduces the air as hot air into the spray drying chamber 100 through the high-temperature gas supply pipe 406. As a gas supply source, it is also possible to use an inert gas such as compressed air through a compressor, nitrogen or argon gas through a gas cylinder or the like.
例えば、噴霧盤２００が図中矢印Ｆ方向で示す時計回りに回転しながら、径方向外側（図中矢印Ｘ方向）に原料液を噴霧すると、乾燥手段４０により図中Ｙ方向から旋回導入された高温ガス（熱風）が接触し、噴霧盤２００からの噴流と乾燥手段４０からの高温ガスの流れとは、見かけ上、噴霧乾燥室１００内において、図中Ｚ方向に旋回する旋回流を形成し、その旋回力を減衰、旋回径を縮小しながら、噴霧乾燥室１００下部に降下する。
For example, when the raw material liquid is sprayed outward in the radial direction (the direction indicated by the arrow X in the figure) while the spraying plate 200 rotates clockwise as indicated by the direction indicated by the arrow F in the figure, the raw material liquid is swirled and introduced from the direction Y by the drying means 40. The high-temperature gas (hot air) comes into contact with the jet from the spraying plate 200 and the flow of the high-temperature gas from the drying means 40, and apparently forms a swirl in the spray-drying chamber 100 in the Z direction in the figure. Then, it descends to the lower part of the spray drying chamber 100 while attenuating the turning force and reducing the turning diameter.
排気・捕集手段５０は、噴霧乾燥室１００内の略中央位置まで挿通された排気管５０４に噴霧乾燥室１００内の高温ガスを排気するためのブロア５００がサイクロン型、バグフィルタ型の集塵装置５０２を介して接続されることにより構成されている。粒径が小さく高温ガスの排気流に混入した乾燥粉体は、排気管５０４先端に位置するキャップ部材５０６下部から図中矢印Ｅ方向に排気され、集塵装置５０２において捕集される。集塵装置５０２には、回収手段８０としての第２乾燥粉体回収部８０２が接続されている。第２乾燥粉体回収部８０２としては、第１乾燥粉体回収部８００と同様に、例えば、円錐形や四角錘形のホッパーや、トレイ、袋体といった種々の回収手段を適用することができ、ヘルール、バンド、クランプ、フランジ等の接続手段を介して集塵装置５０２と着脱自在に接続することが可能であれば、その種類、使用に制限はない。また、スクリューフィーダー、空気輸送等の何れかの手段によって、乾燥粉体をサイロ等の貯蔵施設に輸送する形態としてもかまわない。
The exhaust / collecting means 50 is a cyclone-type or bag-filter-type dust blower 500 for exhausting high-temperature gas in the spray-drying chamber 100 through an exhaust pipe 504 inserted to a substantially central position in the spray-drying chamber 100. It is configured by being connected via the device 502. The dry powder having a small particle size and mixed into the exhaust gas stream of the high-temperature gas is exhausted from the lower part of the cap member 506 located at the end of the exhaust pipe 504 in the direction of arrow E in the drawing, and collected by the dust collecting device 502. A second dry powder collection unit 802 as the collection unit 80 is connected to the dust collection device 502. As the second dry powder collecting section 802, various collecting means such as a conical or quadrangular pyramid-shaped hopper, a tray, or a bag body can be applied as in the first dry powder collecting section 800. There is no limitation on the type and use as long as it can be detachably connected to the dust collecting device 502 via connection means such as a ferrule, a band, a clamp, and a flange. Further, the dry powder may be transported to a storage facility such as a silo by any means such as a screw feeder or pneumatic transport.
旋回力付与手段６０は、噴霧盤２００からの噴流と乾燥手段４０からの高温ガスの流れとからなる旋回流に含まれる乾燥粉体に対して旋回力を付与する旋回力付与部材６００を備える。旋回力付与部材６００は、気体供給手段７０から供給された気体（空気、窒素若しくはアルゴンガス等の不活性ガス）に基づき、噴霧盤２００の回転方向（図中Ｆ方向）と同方向の図中矢印Ｂ方向に回転することで、旋回流に含まれる乾燥粉体に対して旋回力を付与する。旋回径を小さくしながら降下する乾燥粉体は、旋回力付与部材６００により付与された旋回力によって、図中矢印Ａ方向の旋回径外側の噴霧乾燥室１００内壁側に向うことになる。この乾燥粉体の噴霧乾燥室１００内壁側への移動は、粒子径が大きいものほど顕著である。そして、従来ならば、排気・捕集手段５０によって回収されていた小さな粒径の乾燥粉体についても、旋回力の付与により従来の落下軌道から逸れ、第１乾燥粉体回収部８００において回収可能となる。
The swirling force applying means 60 includes a swirling force applying member 600 for applying a swirling force to the dry powder contained in the swirling flow composed of the jet from the spraying plate 200 and the flow of the high-temperature gas from the drying means 40. The turning force applying member 600 is based on the gas (an inert gas such as air, nitrogen, or argon gas) supplied from the gas supply means 70, and is in the same direction as the rotation direction (F direction in the figure) of the spraying plate 200 in the figure. By rotating in the direction of arrow B, a swirling force is applied to the dry powder contained in the swirling flow. The dried powder that descends while reducing the turning diameter is directed to the spray drying chamber 100 inner wall side outside the turning diameter in the direction of arrow A in the figure by the turning force applied by the turning force applying member 600. The movement of the dried powder toward the inner wall side of the spray drying chamber 100 is more remarkable as the particle diameter increases. And, conventionally, even the dry powder having a small particle diameter collected by the exhaust / collecting means 50 is deviated from the conventional fall trajectory by the application of the turning force, and can be collected in the first dry powder collecting section 800. Becomes
気体供給手段７０は、フィルタ７００と、ブロワ７０２と、ヒータ７０４とが気体供給管７０６により接続されて構成されている。気体供給手段７０は、フィルタ７００を介してブロワ７０４で取り込んだ気体（空気）をヒータ７０２で加温し、噴霧乾燥室１００内に挿通した気体供給管７０６を通じて旋回力付与部材６００が回転する駆動源として供給する。なお、気体供給源としては、コンプレッサを介した圧縮空気、ガスボンベ等を介した窒素、アルゴンガス等の不活性ガスも使用することが可能である。
The gas supply means 70 includes a filter 700, a blower 702, and a heater 704 connected by a gas supply pipe 706. The gas supply unit 70 drives the heater (702) to heat the gas (air) taken in by the blower 704 through the filter 700, and rotates the turning force applying member 600 through the gas supply pipe 706 inserted into the spray drying chamber 100. Supply as a source. As a gas supply source, it is also possible to use an inert gas such as compressed air through a compressor, nitrogen or argon gas through a gas cylinder or the like.
図２は、本実施形態に係る旋回力付与手段６０が備える旋回力付与部材６００の構成を示す説明図であり、図３は図２に示す矢印Ｇ方向から見た旋回力付与部材６００の構成を示す説明図である。旋回力付与部材６００は、気体供給手段７０から供給された気体（空気、圧縮空気、又は窒素若しくはアルゴンガス等の不活性ガス）に基づき回転する羽根部材６１０を備え、噴霧乾燥室１００内で旋回する旋回流に対して旋回力を付与する。旋回力付与部材６００の本体部６０２は、ステンレス等の鋼材によって中空の円筒形状に形成されており、その一端側端部は、排気管５０４先端に位置するキャップ部材５０６の屋根部分に載置可能となるように、本体部６０２内径が拡径した足部６０４が形成されている。また、キャップ部材５０６の屋根部分を水平にすることで、足部６０４を拡径させることなく設置することも可能である。そして、本体部６０２内部には、Ｌ字状継手部材７０８を介して接続された気体供給管７０６から供給された気体（空気、圧縮空気、又は窒素若しくはアルゴンガス等の不活性ガス）により回転軸６０８を駆動させるエアモータ６０６が収容されている。なお、回転軸６０８を駆動させる駆動源は、エアモータ以外にも、例えば、電動機、油圧モータ等も利用することが可能である。
FIG. 2 is an explanatory view showing the configuration of the turning force applying member 600 provided in the turning force applying means 60 according to the present embodiment, and FIG. 3 is a configuration of the turning force applying member 600 viewed from the direction of arrow G shown in FIG. FIG. The turning force applying member 600 includes a blade member 610 that rotates based on a gas (air, compressed air, or an inert gas such as nitrogen or argon gas) supplied from the gas supply unit 70, and turns in the spray drying chamber 100. A swirling force is applied to the swirling flow that flows. The main body 602 of the turning force applying member 600 is formed of a steel material such as stainless steel into a hollow cylindrical shape, and one end of the main body 602 can be placed on the roof of the cap member 506 located at the end of the exhaust pipe 504. The foot 604 is formed such that the inner diameter of the main body 602 is increased. Further, by setting the roof portion of the cap member 506 to be horizontal, it is possible to install the cap member 604 without expanding the diameter of the foot portion 604. The inside of the main body 602 is rotated by a gas (air, compressed air, or an inert gas such as nitrogen or argon gas) supplied from a gas supply pipe 706 connected via an L-shaped joint member 708. An air motor 606 for driving the 608 is accommodated. As a drive source for driving the rotating shaft 608, for example, an electric motor, a hydraulic motor, or the like can be used in addition to the air motor.
回転軸６０８には、軸支部６２０を介して羽根部材６１０が接続されており、エアモータ６０６の駆動に伴う回転軸６０８の回転によって、羽根部材６１０が回転可能となるように構成されている。羽根部材６１０は、軸支部６２０と一体形成された回転板部６１２上に羽根片部材６１４が等角度間隔に複数枚（本実施形態においては４枚）固定されており、回転板部６１２の回転に伴い、羽根片部材６１４が回転することで、噴霧乾燥室１００内で旋回する旋回流に対して旋回力を付与することができる。なお、羽根片部材６１４は、例えば、固定用端部と羽根片部とが形成されるように、ステンレス等の長板鋼材をＬ字状に折り曲げることによって形成することができる。そして、図３に示されるように、固定用端部６１６に設けた固定孔６１８を介してネジ、ボルトで回転板部６１２に固定してもよいし、溶接等の適当な接着手段で固定してもかまわない。
羽 A blade member 610 is connected to the rotation shaft 608 via a shaft support 620, and the blade member 610 is configured to be rotatable by rotation of the rotation shaft 608 accompanying driving of the air motor 606. The blade member 610 has a plurality of (four in the present embodiment) blade piece members 614 fixed at equal angular intervals on a rotating plate portion 612 integrally formed with the shaft support portion 620, and the rotation of the rotating plate portion 612. With the rotation of the blade piece member 614, a swirling force can be applied to the swirling flow swirling in the spray drying chamber 100. The blade piece member 614 can be formed, for example, by bending a long plate steel material such as stainless steel into an L shape so that a fixing end and a blade piece are formed. Then, as shown in FIG. 3, it may be fixed to the rotating plate portion 612 with screws and bolts through fixing holes 618 provided in the fixing end portion 616, or may be fixed by appropriate bonding means such as welding. It doesn't matter.
また、例えば、旋回力付与部材として、図４に示すような羽根部材６３０を用いることも可能である。羽根部材６３０は、所謂、フラットブレードタービン様の構造を有し、軸支部６３６と一体形成された回転板部６３２の周縁部に等角度間隔（この例では６枚）に羽根片部材６３４を設けている。羽根部材６１０と同様に、羽根部材６３０は、エアモータ６０６の駆動に伴う回転軸６０８の回転によって、羽根片部材６３４が回転可能となっている。
Further, for example, a blade member 630 as shown in FIG. 4 can be used as the turning force applying member. The blade member 630 has a so-called flat blade turbine-like structure, and blade member members 634 are provided at equal angular intervals (six in this example) on the periphery of a rotating plate portion 632 integrally formed with the shaft support portion 636. ing. Similarly to the blade member 610, the blade member 630 allows the blade piece member 634 to rotate by rotation of the rotation shaft 608 accompanying driving of the air motor 606.
また、例えば、図５（ａ）に示すような２枚のパドル状の羽根片部材６４４を直接軸支部６４２に設けた羽根部材６４０、図５（ｂ）に示すような４枚のパドル状の羽根片部材６５４を直接軸支部６５２に設けた羽根部材６５０等も用いることも可能である。この場合、軸支部に対する取付角度を調節することにより、羽根部材に傾斜角度を設けることも無論可能である。また、単なる、３枚プロペラ、４枚プロペラといった形状を有する部材を羽根部材として用いることが可能であることは、言うまでもない。
Further, for example, a blade member 640 in which two paddle-shaped blade piece members 644 as shown in FIG. 5A are provided directly on the shaft support 642, and four paddle-shaped blade members as shown in FIG. It is also possible to use a blade member 650 or the like in which the blade piece member 654 is provided directly on the shaft support 652. In this case, it is of course possible to provide the blade member with an inclination angle by adjusting the mounting angle with respect to the shaft support portion. Needless to say, a member having a shape such as a simple three-propeller or a four-propeller can be used as the blade member.
これまでに説明した旋回力付与部材は、エアモータ、若しくは電動機、油圧モータ等を回転軸の駆動源としたものについて説明したが、本発明に係る旋回力付与部材は、これに限定されるものではない。例えば、図６に示す旋回力付与部材６６０は、コンプレッサ又はブロワから供給された空気（圧縮空気）を直接排出することで、羽根部材を回転させることができる。具体的には、旋回力付与部材６６０は、旋回力付与部材６００と同様に、コンプレッサ又はブロワの気体発生手段７１２において発生され、圧縮空気供給管７１４を介して供給された空気（圧縮空気）に基づき回転する羽根片部材６６２を備え、噴霧乾燥室１００内で旋回する旋回流に対して旋回力を付与する。旋回力付与部材６６０の本体部６０２は、ステンレス等の鋼材によって中空の円筒形状に形成されており、その一端側端部は、排気管５０４先端に位置するキャップ部材５０６の屋根部分に載置可能となるように、本体部６０２内径が拡径した足部６０４が形成されている。また、キャップ部材５０６の屋根部分を水平にすることで、足部６０４を拡径させることなく設置することも可能である。本体部６０２内部には、Ｌ字状継手部材７０８を介して接続された圧縮空気供給管７１４から供給された空気（圧縮空気）を噴射口７２６に供給する本体内圧縮空気供給管７２０が収容されている。噴射口７２６からの空気（圧縮空気）の噴射に伴い羽根部材６６２と共に回転する回転軸７２４は、その内部が中空となるように形成されており、本体内圧縮空気供給管７２０から供給された空気（圧縮空気）により回転可能となるようにベアリング部７２２により軸支されている。
Although the turning force applying member described so far has been described as an air motor, or an electric motor, a hydraulic motor, or the like having a driving source of the rotating shaft, the turning force applying member according to the present invention is not limited to this. Absent. For example, the turning force imparting member 660 shown in FIG. 6 can rotate the blade member by directly discharging air (compressed air) supplied from a compressor or a blower. Specifically, similarly to the turning force applying member 600, the turning force applying member 660 generates air (compressed air) generated by the gas generating means 712 of a compressor or a blower and supplied through a compressed air supply pipe 714. A swirling force is applied to a swirling flow swirling in the spray-drying chamber 100. The main body 602 of the turning force applying member 660 is formed in a hollow cylindrical shape by a steel material such as stainless steel, and one end of the main body 602 can be placed on the roof portion of the cap member 506 located at the end of the exhaust pipe 504. The foot 604 is formed such that the inner diameter of the main body 602 is increased. Further, by making the roof portion of the cap member 506 horizontal, it is possible to install the cap member 604 without expanding the diameter of the foot portion 604. Inside the main body part 602, a main body compressed air supply pipe 720 for supplying air (compressed air) supplied from a compressed air supply pipe 714 connected via an L-shaped joint member 708 to the injection port 726 is accommodated. ing. The rotary shaft 724 that rotates together with the blade member 662 in accordance with the injection of air (compressed air) from the injection port 726 is formed such that the inside thereof is hollow, and the air supplied from the compressed air supply pipe 720 in the main body. It is rotatably supported by a bearing portion 722 so as to be rotatable by (compressed air).
加えて、図５（ａ）に示した２枚のパドル状の羽根片部材６４４を直接軸支部６４２に設けた羽根部材６４０、図５（ｂ）に示した４枚のパドル状の羽根片部材６５４を直接軸支部６５２に設けた羽根部材６５０等についても、旋回力付与部材６６０と同様に、供給された空気（圧縮空気）を直接排出することで、羽根部材を回転させることができる。この場合、図７（ａ）に示す羽根部材６４０’のように、羽根片部材６４４表面に形成された噴射口６４６への空気（圧縮空気）の供給が可能となるように軸支部６４２から羽根片部材６４４にかけての内部を中空構造となるように構成すればよい。また、同様に、図７（ｂ）に示す羽根部材６５０’については、羽根片部材６５４表面に形成された噴射口６５６への空気（圧縮空気）の供給が可能となるように軸支部６５２から羽根片部材６５４にかけての内部を中空構造となるように構成すればよい。このような構成とすることにより、空気（圧縮空気）の直接排出に伴い羽根部材を回転させることができる。なお、上記羽根部材を駆動させる駆動力としては、コンプレッサ又はブロワから供給された空気（圧縮空気）以外にもガスボンベ等を介した窒素、アルゴンガス等の不活性ガスも使用することが可能である。
In addition, a blade member 640 in which the two paddle-shaped blade piece members 644 shown in FIG. 5A are directly provided on the shaft support 642, and four paddle-shaped blade piece members shown in FIG. 5B. The blade member 650 and the like provided with the 654 directly on the shaft support portion 652 can also rotate the blade member by directly discharging the supplied air (compressed air), similarly to the turning force applying member 660. In this case, like the blade member 640 ′ shown in FIG. 7A, the blade (640 ′) is supplied from the shaft support 642 so that air (compressed air) can be supplied to the injection port 646 formed on the surface of the blade piece member 644. What is necessary is just to comprise so that the inside over the one member 644 may become a hollow structure. Similarly, as for the blade member 650 ′ shown in FIG. 7B, the air (compressed air) is supplied from the shaft support portion 652 so that air (compressed air) can be supplied to the injection port 656 formed on the surface of the blade piece member 654. What is necessary is just to comprise so that the inside over the blade piece member 654 may become a hollow structure. With such a configuration, the blade member can be rotated with the direct discharge of air (compressed air). In addition, as a driving force for driving the blade member, an inert gas such as nitrogen or argon gas via a gas cylinder or the like can be used in addition to air (compressed air) supplied from a compressor or a blower. .
上記構成を有する噴霧乾燥装置１０を用いて乾燥粉体を製造する場合には、原料液供給管３０４を介して噴霧盤２０内部に原料液を供給した状態で噴霧盤２００を大凡５０～６００００ｒｐｍの速度で回転させる。噴霧盤２００の回転に伴う遠心力によって、盤内部に供給された原料液は、図１中矢印Ｘ方向の径方向外側３６０°全方向に噴霧される。噴霧盤２００が回転しながら、図１中矢印Ｘ方向の径方向外側３６０°全方向に原料液を噴霧すると、乾燥手段４０により図中Ｙ方向から旋回導入された高温ガス（熱風）が接触し、噴霧盤２００からの噴流と乾燥手段４０からの高温ガスの流れとは、噴霧乾燥室１００内において、図中Ｚ方向に旋回する旋回流を形成し、その旋回力を減衰、旋回径を縮小しながら、噴霧乾燥室１００下部に降下する。このとき、旋回力付与手段６０は、噴霧盤２００からの噴流と乾燥手段４０からの高温ガスの流れとからなる旋回流に含まれる乾燥粉体に対して旋回力を付与する。旋回力付与手段６０が備える旋回力付与部材６００は、気体供給手段７０から供給された気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）に基づき、噴霧盤２００の回転方向と同方向に回転することで、旋回流に含まれる乾燥粉体に対して旋回力を付与する。旋回力を減衰、旋回径を小さくしながら降下する乾燥粉体は、旋回力付与部材６００により付与された旋回力によって、図中矢印Ａ方向の旋回径外側の噴霧乾燥室１００内壁側に向うことになる。そして、従来ならば、排気・捕集手段５０によって回収されていた小さな粒径の乾燥粉体についても、旋回力の付与により従来の落下軌道から逸れ、第１乾燥粉体回収部８００において回収可能となり、当該第１乾燥粉体回収部８００における収率を向上させることができる。
When dry powder is manufactured using the spray drying apparatus 10 having the above-described configuration, the spraying plate 200 is rotated at approximately 50 to 60,000 rpm while the raw material liquid is supplied into the spraying plate 20 through the raw material liquid supply pipe 304. Rotate at speed. Due to the centrifugal force associated with the rotation of the spraying board 200, the raw material liquid supplied to the inside of the board is sprayed in all directions 360 degrees radially outward in the direction of arrow X in FIG. When the spray liquid 200 is sprayed in all directions 360 degrees radially outward in the arrow X direction in FIG. 1 while rotating, the hot gas (hot air) swirled and introduced from the Y direction in FIG. The jet from the spray plate 200 and the flow of the high-temperature gas from the drying means 40 form a swirl in the spray-drying chamber 100, which swirls in the Z direction in the figure, attenuates the swirling force and reduces the swirl diameter. While descending to the lower part of the spray drying chamber 100. At this time, the swirling force applying means 60 applies a swirling force to the dry powder contained in the swirling flow composed of the jet from the spraying plate 200 and the flow of the high-temperature gas from the drying means 40. The turning force applying member 600 included in the turning force applying means 60 is configured to control the rotation direction of the spraying plate 200 based on the gas (inert gas such as air (compressed air), nitrogen, or argon gas) supplied from the gas supply means 70. By rotating in the same direction, a swirling force is applied to the dry powder contained in the swirling flow. The dried powder that attenuates the turning force and descends while reducing the turning diameter is directed to the inner side of the spray drying chamber 100 outside the turning diameter in the direction of arrow A in the drawing by the turning force applied by the turning force applying member 600. become. And, conventionally, even the dry powder having a small particle diameter collected by the exhaust / collecting means 50 is deviated from the conventional fall trajectory by the application of the turning force, and can be collected in the first dry powder collecting section 800. Thus, the yield in the first dry powder recovery section 800 can be improved.
［実施例］
本実施形態に係る噴霧乾燥装置１０の効果を確認するため、旋回力付与手段を有する噴霧乾燥装置１０（羽根有）と、図９で示した従来型の噴霧乾燥装置１５（羽根無）とで噴霧乾燥室１００直下に設けられた第１乾燥粉体回収部８００にて回収される乾燥粉体の収率を比較した。 [Example]
In order to confirm the effect of thespray drying device 10 according to the present embodiment, the spray drying device 10 (with blades) having the turning force applying means and the conventional spray drying device 15 (without blades) shown in FIG. 9 are used. The yields of the dry powders collected by the first dry powder collection unit 800 provided immediately below the spray drying chamber 100 were compared.
本実施形態に係る噴霧乾燥装置１０の効果を確認するため、旋回力付与手段を有する噴霧乾燥装置１０（羽根有）と、図９で示した従来型の噴霧乾燥装置１５（羽根無）とで噴霧乾燥室１００直下に設けられた第１乾燥粉体回収部８００にて回収される乾燥粉体の収率を比較した。 [Example]
In order to confirm the effect of the
本試験は、表１に示す条件下で行うものとし、原料液としてアルミナを溶媒としての水に分散したスラリー（アルミナ５０％スラリ―）を用いた。
This test was performed under the conditions shown in Table 1, and a slurry (alumina 50% slurry) in which alumina was dispersed in water as a solvent was used as a raw material liquid.
表１から明らかなように、本実施形態に係る噴霧乾燥装置１０において、噴霧乾燥室１００直下に設けられた第１乾燥粉体回収部８００における収率（収率（本体下））が、羽根無の従来型に係る噴霧乾燥装置１２のそれと比較して、大きく向上していることが確認された。第２乾燥粉体回収部８０２における収率（収率（サイクロン））が羽根無の従来型に係る噴霧乾燥装置１２のそれと比較して低いことからしても、乾燥粉体の大部分は第１乾燥粉体回収部８００において回収されることが分かった。
As is clear from Table 1, in the spray drying apparatus 10 according to the present embodiment, the yield (yield (under the main body)) in the first dry powder recovery unit 800 provided immediately below the spray drying chamber 100 is the blade. It was confirmed that it was greatly improved as compared with that of the conventional spray-drying apparatus 12 having no. Even though the yield (yield (cyclone)) in the second dry powder recovery unit 802 is lower than that of the conventional spray drying apparatus 12 having no blade, most of the dry powder is in the second dry powder recovery unit 802. It was found that the dried powder was collected in the dry powder collecting section 800.
［変形例］
これまでに説明した旋回力付与手段が備える旋回力付与部材６００～６５０は、供給された気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）に基づき回転する羽根部材を備える構成であったが、旋回流に含まれる乾燥粉体に対して旋回力を付与する手段としてはこれに限定されるものではない。例えば、図８（ａ）に示す噴霧乾燥装置１２は、噴霧乾燥室１００内壁に沿って気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）を供給する気体供給手段７０’を備え、当該気体供給手段７０’から供給する気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）を旋回流に含まれる乾燥粉体に対する旋回力付与手段として構成することも可能である。 [Modification]
Each of the turningforce applying members 600 to 650 included in the turning force applying means described above includes a blade member that rotates based on the supplied gas (inert gas such as air (compressed air), nitrogen, or argon gas). However, means for imparting a swirling force to the dry powder contained in the swirling flow is not limited to this. For example, the spray drying apparatus 12 shown in FIG. 8A includes a gas supply unit 70 ′ that supplies a gas (inert gas such as air (compressed air), nitrogen, or argon gas) along the inner wall of the spray drying chamber 100. A gas (air (compressed air), an inert gas such as nitrogen or argon gas) supplied from the gas supply unit 70 'may be provided as a swirling force applying unit for the dry powder contained in the swirling flow. is there.
これまでに説明した旋回力付与手段が備える旋回力付与部材６００～６５０は、供給された気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）に基づき回転する羽根部材を備える構成であったが、旋回流に含まれる乾燥粉体に対して旋回力を付与する手段としてはこれに限定されるものではない。例えば、図８（ａ）に示す噴霧乾燥装置１２は、噴霧乾燥室１００内壁に沿って気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）を供給する気体供給手段７０’を備え、当該気体供給手段７０’から供給する気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）を旋回流に含まれる乾燥粉体に対する旋回力付与手段として構成することも可能である。 [Modification]
Each of the turning
噴霧乾燥装置１２は、気体供給手段７０’以外の構成は先に説明した噴霧乾燥装置１０と同構成とすることができる。気体供給手段７０’は、フィルタ７００と、ブロワ７０２と、ヒータ７０４とが気体供給管７０６’により接続されて構成されている。気体供給手段７０’は、フィルタ７００を介してブロワ７０４で取り込んだ気体（空気）をヒータ７０２で加温し、気体供給管７０６’を介して噴霧乾燥室１００内に供給する。ここで、気体供給管７０６’は、図８（ａ）におけるＴ－Ｔ’線断面図（図８（ｂ））に示すように、噴霧乾燥室１００内壁に沿って気体（空気）を供給可能となるように構成されており、その先端部には気体（空気）を噴出する噴出口７２８が形成されている。噴出口７２８から図中矢印Ｈ方向に噴出された気体（空気）は、噴霧乾燥室１００内壁に沿って旋回するとともに、噴霧盤２００からの噴流と乾燥手段４０からの高温ガスの流れとからなる旋回流に含まれる乾燥粉体に対して旋回力を付与することができる。なお、気体供給源としては、コンプレッサを介した圧縮空気、ガスボンベ等を介した窒素、アルゴンガス等の不活性ガスも使用することが可能である。なお、気体供給手段７０’を介して供給する気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）は、装置内での結露の発生を抑えるために、気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）をヒータ７０２で加温した温（熱）風とすることが好ましい。
The structure of the spray-drying device 12 other than the gas supply means 70 ′ can be the same as the structure of the spray-drying device 10 described above. The gas supply means 70 'is configured such that a filter 700, a blower 702, and a heater 704 are connected by a gas supply pipe 706'. The gas supply means 70 ′ heats the gas (air) taken in by the blower 704 via the filter 700 with the heater 702, and supplies the gas (air) into the spray-drying chamber 100 via the gas supply pipe 706 ′. Here, the gas supply pipe 706 ′ can supply gas (air) along the inner wall of the spray-drying chamber 100 as shown in a cross-sectional view along the line TT ′ in FIG. 8A (FIG. 8B). A jet port 728 for jetting gas (air) is formed at the tip end. The gas (air) ejected from the ejection port 728 in the direction of arrow H in the drawing is swirled along the inner wall of the spray drying chamber 100, and is composed of a jet from the spray plate 200 and a flow of high-temperature gas from the drying means 40. A swirling force can be applied to the dry powder contained in the swirling flow. As a gas supply source, it is also possible to use an inert gas such as compressed air through a compressor, nitrogen or argon gas through a gas cylinder or the like. The gas (air (compressed air), inert gas such as nitrogen or argon gas) supplied via the gas supply means 70 'is a gas (air (compressed air) to suppress the occurrence of dew condensation in the apparatus. ), An inert gas such as nitrogen or argon gas) is preferably heated (heated) by a heater 702.
旋回流に含まれる乾燥粉体に対する旋回力付与手段として、噴霧乾燥室１００内壁に沿って気体（空気（圧縮空気）、窒素若しくはアルゴンガス等の不活性ガス）を供給する構成は、噴霧乾燥装置を大型化した場合に、特に有用である。すなわち、本構成においては、装置の大型化に伴い旋回力付与手段としての羽根部材を大型化する必要がないため、装置構成を簡素化することができるとともに、装置製造に係るコストも抑えることが可能となる。
A configuration in which a gas (an inert gas such as air (compressed air), nitrogen, or argon gas) is supplied along the inner wall of the spray drying chamber 100 as a means for imparting a swirling force to the dry powder contained in the swirling flow is a spray drying apparatus. This is particularly useful when the size of the is increased. That is, in the present configuration, it is not necessary to increase the size of the blade member as the turning force applying means with the increase in the size of the device, so that the configuration of the device can be simplified and the cost associated with manufacturing the device can be suppressed. It becomes possible.
以上のように、本発明によれば、噴霧乾燥室下部に設けられた乾燥粉体回収部において、高い回収率で乾燥粉体を回収することが可能な噴霧乾燥装置及び噴霧乾燥方法を提供することができる。
As described above, according to the present invention, a spray-drying apparatus and a spray-drying method capable of collecting a dry powder at a high recovery rate in a dry-powder collecting section provided in a lower part of a spray-drying chamber are provided. be able to.
なお、本発明に係る噴霧乾燥装置として、所謂、噴霧した原料液の液滴に含まれる溶媒を高温ガスとの接触により蒸発させ、乾燥するスプレードライヤ方式を採用する装置について説明したが、本発明はこれに限定されるものではなく、例えば、噴霧した原料液の液滴を低温環境下で凝結固化させ、これを凍結乾燥して乾燥粉体を得る噴霧凍結乾燥粉体製造装置に本発明を適用することも可能である。
As the spray-drying apparatus according to the present invention, a so-called spray-dryer system that evaporates a solvent contained in droplets of a sprayed raw material liquid by contact with a high-temperature gas and dries the solvent has been described. The present invention is not limited to this.For example, the present invention is applied to a spray freeze-dried powder manufacturing apparatus in which droplets of a sprayed raw material liquid are coagulated and solidified in a low-temperature environment, and freeze-dried to obtain a dry powder. It is also possible to apply.
１０，１２，１５…噴霧乾燥装置、２０，２０’…噴霧手段、原料液供給手段…３０，３０’、
４０，４０’…乾燥手段、５０…排気・捕集手段、６０…旋回力付与手段、７０，７０’…気体供給手段、８０…回収手段、１００，１００’…噴霧乾燥室、１０２…外壁、１０４…開口部、１０６…天面部、１０８…衝撃・振動付与手段、２００，２００’…噴霧盤、３００…原料液タンク、３０２…ポンプ、３０４…原料液供給管、４００…フィルタ、４０２…ブロワ、４０４…ヒータ、４０６…高温ガス供給管、５００…ブロワ、５０２，５０２’…集塵装置、５０４，５０４’…排気管、５０６，５０６’…キャップ部材、６００，６６０…旋回力付与部材、６０２…本体部、６０４…足部、６０６…エアモータ、６０８，７２４…回転軸、６１０，６３０，６４０，６４０’，６５０，６５０’…羽根部材、６１２，６３２…回転板部、６１４，６３４，６４４，６５４、６６２…羽根片部材、６１８…固定用端部、６２０，６３６，６４２，６５２…軸支部、６４６，６５６…噴射口、７００…フィルタ、７０２…ブロワ、７０４…ヒータ、７０６…気体供給管、７０８…Ｌ字形継手部材、７１２…気体発生手段、７１４…圧縮空気供給管、７２０…本体内圧縮空気供給管、７２２…ベアリング部、８００，８００’…第１乾燥粉体回収部、８０２，８０２’…第２乾燥粉体回収部、 10, 12, 15 ... spray-drying device, 20, 20 '... spraying means, raw material liquid supply means ... 30, 30',
40, 40 'drying means, 50 exhaust / collecting means, 60 turning force applying means, 70, 70' gas supply means, 80 recovery means, 100, 100 'spray drying chamber, 102 outer wall, 104: opening, 106: top surface, 108: shock / vibration imparting means, 200, 200 ': spraying board, 300: raw material tank, 302: pump, 304: raw material supply pipe, 400: filter, 402:blower 404, heater, 406, high-temperature gas supply pipe, 500, blower, 502, 502 ', dust collector, 504, 504', exhaust pipe, 506, 506 ', cap member, 600, 660, turning force imparting member, 602: body, 604: foot, 606: air motor, 608, 724: rotating shaft, 610, 630, 640, 640 ', 650, 650': blade member, 612, 632: rotating plate, 614 634, 644, 654, 662: Blade piece member, 618: Fixing end, 620, 636, 642, 652: Shaft support, 646, 656: Injection port, 700: Filter, 702: Blower, 704: Heater, 706 ... gas supply pipe, 708 ... L-shaped joint member, 712 ... gas generation means, 714 ... compressed air supply pipe, 720 ... compressed air supply pipe in the main body, 722 ... bearing part, 800,800 '... first dry powder recovery Part, 802, 802 '... second dry powder recovery part,
４０，４０’…乾燥手段、５０…排気・捕集手段、６０…旋回力付与手段、７０，７０’…気体供給手段、８０…回収手段、１００，１００’…噴霧乾燥室、１０２…外壁、１０４…開口部、１０６…天面部、１０８…衝撃・振動付与手段、２００，２００’…噴霧盤、３００…原料液タンク、３０２…ポンプ、３０４…原料液供給管、４００…フィルタ、４０２…ブロワ、４０４…ヒータ、４０６…高温ガス供給管、５００…ブロワ、５０２，５０２’…集塵装置、５０４，５０４’…排気管、５０６，５０６’…キャップ部材、６００，６６０…旋回力付与部材、６０２…本体部、６０４…足部、６０６…エアモータ、６０８，７２４…回転軸、６１０，６３０，６４０，６４０’，６５０，６５０’…羽根部材、６１２，６３２…回転板部、６１４，６３４，６４４，６５４、６６２…羽根片部材、６１８…固定用端部、６２０，６３６，６４２，６５２…軸支部、６４６，６５６…噴射口、７００…フィルタ、７０２…ブロワ、７０４…ヒータ、７０６…気体供給管、７０８…Ｌ字形継手部材、７１２…気体発生手段、７１４…圧縮空気供給管、７２０…本体内圧縮空気供給管、７２２…ベアリング部、８００，８００’…第１乾燥粉体回収部、８０２，８０２’…第２乾燥粉体回収部、 10, 12, 15 ... spray-drying device, 20, 20 '... spraying means, raw material liquid supply means ... 30, 30',
40, 40 'drying means, 50 exhaust / collecting means, 60 turning force applying means, 70, 70' gas supply means, 80 recovery means, 100, 100 'spray drying chamber, 102 outer wall, 104: opening, 106: top surface, 108: shock / vibration imparting means, 200, 200 ': spraying board, 300: raw material tank, 302: pump, 304: raw material supply pipe, 400: filter, 402:
Claims (14)
- 原料液を乾燥室内に噴霧する噴霧手段と、
前記噴霧手段からの噴流に高温ガスを接触させることにより前記原料液を乾燥し、乾燥粉体を得る乾燥手段と、
前記噴霧手段からの噴流と前記高温ガスの流れとからなる旋回流に含まれる前記乾燥粉体に対して旋回力を付与する旋回力付与手段と、
前記乾燥室下部に設けられ、乾燥した前記乾燥粉体を回収する回収手段とを備えること
を特徴とする噴霧乾燥装置。 Spraying means for spraying the raw material liquid into the drying chamber;
Drying means for drying the raw material liquid by contacting a high-temperature gas with a jet from the spraying means to obtain a dry powder,
A swirling force applying unit that applies a swirling force to the dry powder included in the swirling flow including the jet from the spraying unit and the flow of the high-temperature gas,
A spray drying device provided at a lower portion of the drying chamber, and a collecting means for collecting the dried dry powder. - 前記旋回流は、渦巻き状に乾燥室下方に移動する流れであって、前記旋回力付与手段は、前記旋回力を乾燥室内壁側に向けて付与すること
を特徴とする請求項１に記載の噴霧乾燥装置。 The swirling flow is a flow that moves in a spiral shape below the drying chamber, and the swirling force applying unit applies the swirling force toward a wall of the drying chamber. Spray drying equipment. - 前記旋回力付与手段は、所定の駆動力により回転する羽根部材を備えること
を特徴とする請求項２に記載の噴霧乾燥装置。 The spray-drying apparatus according to claim 2, wherein the turning force applying unit includes a blade member that rotates by a predetermined driving force. - 前記所定の駆動力は、エアモータ、電動機、又は油圧モータの何れかであること
を特徴とする請求項３に記載の噴霧乾燥装置。 The said predetermined drive force is any one of an air motor, an electric motor, or a hydraulic motor. The spray-drying apparatus of Claim 3 characterized by the above-mentioned. - 前記所定の駆動力は、コンプレッサ、ブロワ、又はガスボンベから供給された圧縮空気又は不活性ガスに基づくものであること
を特徴とする請求項３に記載の噴霧乾燥装置。 The said predetermined driving force is based on the compressed air or inert gas supplied from the compressor, the blower, or the gas cylinder, The spray-drying apparatus of Claim 3 characterized by the above-mentioned. - 前記旋回力付与手段は、前記乾燥室内壁に沿って気体を供給する気体供給部材であること
を特徴とする請求項２に記載の噴霧乾燥装置。 The spray drier according to claim 2, wherein the turning force applying means is a gas supply member that supplies gas along the inner wall of the drying chamber. - 前記気体は空気又は不活性ガスであること
を特徴とする請求項６に記載の噴霧乾燥装置。 The said gas is air or an inert gas. The spray-drying apparatus of Claim 6 characterized by the above-mentioned. - 原料液を乾燥室内に噴霧する噴霧ステップと、
前記噴霧ステップにおける噴流に高温ガスを接触させることにより前記原料液を乾燥し、乾燥粉体を得る乾燥ステップと、
前記噴霧ステップにおける噴流と前記高温ガスの流れとからなる旋回流に含まれる前記乾燥粉体に対して旋回力を付与する旋回力付与ステップと、
前記乾燥室下部において、乾燥した前記乾燥粉体を回収する回収ステップとを備えること
を特徴とする噴霧乾燥方法。 A spraying step of spraying the raw material liquid into the drying chamber;
A drying step of drying the raw material liquid by contacting a high-temperature gas with the jet in the spraying step to obtain a dry powder;
A swirling force applying step of applying a swirling force to the dry powder included in the swirl flow including the jet and the high-temperature gas flow in the spraying step,
A collecting step of collecting the dried powder in a lower part of the drying chamber. - 前記旋回流は、渦巻き状に乾燥室下方に移動する流れであって、前記旋回力付与ステップでは、前記旋回力を乾燥室内壁側に向けて付与すること
を特徴とする請求項８に記載の噴霧乾燥方法。 The swirling flow is a flow that moves in a spiral shape below the drying chamber, and in the swirling force applying step, the swirling force is applied toward a wall of the drying chamber. Spray drying method. - 前記旋回力付与ステップでは、所定の駆動力により回転する羽根部材を用いること
を特徴とする請求項９に記載の噴霧乾燥方法。 The spray-drying method according to claim 9, wherein in the turning force applying step, a blade member that is rotated by a predetermined driving force is used. - 前記所定の駆動力は、エアモータ、電動機、又は油圧モータの何れかであること
を特徴とする請求項１０に記載の噴霧乾燥方法。 The spray drying method according to claim 10, wherein the predetermined driving force is one of an air motor, an electric motor, and a hydraulic motor. - 前記所定の駆動力は、コンプレッサ、ブロワ又はガスボンベから供給された圧縮空気又は不活性ガスに基づくものであること
を特徴とする請求項１０に記載の噴霧乾燥方法。 The spray drying method according to claim 10, wherein the predetermined driving force is based on compressed air or an inert gas supplied from a compressor, a blower, or a gas cylinder. - 前記旋回力付与ステップでは、前記乾燥室内壁に沿って気体を供給する気体供給部材を用いること
を特徴とする請求項９に記載の噴霧乾燥方法。 The spray-drying method according to claim 9, wherein a gas supply member that supplies gas along the inner wall of the drying chamber is used in the turning force applying step. - 前記気体は空気又は不活性ガスであること
を特徴とする請求項１３に記載の噴霧乾燥方法。 The spray drying method according to claim 13, wherein the gas is air or an inert gas.
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| JP2001219126A (en) * | 2000-02-09 | 2001-08-14 | Ishikawajima Harima Heavy Ind Co Ltd | Air current sorting/drying and refuse solidified fuel manufacturing installation using this device |
| JP2007285619A (en) * | 2006-04-18 | 2007-11-01 | Denso Corp | Spray drying device and spray drying method |
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| JP2011208811A (en) * | 2010-03-26 | 2011-10-20 | Espec Corp | Sealed container and drying treatment device |
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| JPH0780271A (en) * | 1993-09-09 | 1995-03-28 | Tokin Corp | Granulating drying apparatus |
| JP2001219126A (en) * | 2000-02-09 | 2001-08-14 | Ishikawajima Harima Heavy Ind Co Ltd | Air current sorting/drying and refuse solidified fuel manufacturing installation using this device |
| JP2007285619A (en) * | 2006-04-18 | 2007-11-01 | Denso Corp | Spray drying device and spray drying method |
| JP2008089235A (en) * | 2006-10-02 | 2008-04-17 | Kigyo Kumiai Shizuoka Kikai Seisakusho | Heating treatment device |
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