JP3301610B2 - Porous filter for spray drying - Google Patents
Porous filter for spray dryingInfo
- Publication number
- JP3301610B2 JP3301610B2 JP27010189A JP27010189A JP3301610B2 JP 3301610 B2 JP3301610 B2 JP 3301610B2 JP 27010189 A JP27010189 A JP 27010189A JP 27010189 A JP27010189 A JP 27010189A JP 3301610 B2 JP3301610 B2 JP 3301610B2
- Authority
- JP
- Japan
- Prior art keywords
- porous filter
- spray
- spray drying
- filter
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は噴霧乾燥装置の乾燥室に用いられる多孔質フ
ィルターに関する。更に、詳しくは噴霧乾燥装置の乾燥
室を構成し、生成粉粒体とガスとの分離を行なって粉粒
体を回収するための通気性の多孔質フィルターに関す
る。Description: TECHNICAL FIELD The present invention relates to a porous filter used in a drying chamber of a spray dryer. More particularly, the present invention relates to a gas-permeable porous filter which constitutes a drying chamber of a spray-drying apparatus, and separates generated particles from gas to recover the particles.
［従来の技術］ 噴霧乾燥は、基本的には原液の噴霧、噴霧により
生じた微小液滴の乾燥、粉粒体製品の分離回収の３つ
の機能を必須としていたが、最近では、多品種少量生産
方式や高純度製品の製造が要請され、出願人は先に特開
昭62−152501公報において、噴霧、乾燥、分離回収を同
一の乾燥域で行うようにすると同時に、品種の切り換え
に応じ乾燥室を自在に取換えできる方法及び装置を提案
した。[Prior art] Spray drying basically requires three functions of spraying a stock solution, drying microdroplets generated by spraying, and separating and recovering a granular product. The production method and the production of high-purity products are required. A method and apparatus for freely changing chambers has been proposed.
［発明が解決しようとする課題］ 上記提案の方法及び装置は噴霧乾燥室を多孔質膜で構
成することにより、噴霧、乾燥、分離回収を同一の乾燥
域で行い、同時に乾燥室の取換えを容易にできるように
したもので、極めて実用性の高いものである。[Problems to be Solved by the Invention] In the above-mentioned proposed method and apparatus, the spray drying chamber is made of a porous membrane, so that spraying, drying, separation and recovery are performed in the same drying zone, and at the same time, the drying chamber is replaced. It is made very easy and very practical.
本発明者は、この噴霧乾燥方法及び装置についてさら
に実験を重ねていたところ、熱風送風量、乾燥室の内外
圧力差、粉粒体の粒度などの運転条件如何により、乾燥
室を構成する多孔質膜、即ち多孔質フィルターからの粉
塵漏れが発生したり、圧力損失が大きくなり定常な運転
ができなくなるという事態に直面した。そこで本発明者
は、この原因究明と問題解決のため種々検討を行なった
結果、乾燥室を構成する多孔質フィルターの通気度ある
いは目開きを適切に選定すること、さらには運転時の多
孔質フィルターの形状（即ち、乾燥室の形状）を所定と
することで、上記問題を解決できることを見出し、本発
明に到達したものである。The inventor of the present invention has conducted further experiments on the spray drying method and apparatus. Dust leakage from the membrane, that is, the porous filter, and a situation where the pressure loss becomes large and a steady operation cannot be performed were encountered. Therefore, the present inventor conducted various investigations for investigating the cause and solving the problem, and as a result, properly selecting the air permeability or opening of the porous filter constituting the drying chamber, and furthermore, selecting the porous filter during operation. It has been found that the above problem can be solved by setting the shape of (i.e., the shape of the drying chamber) to a predetermined value, and arrived at the present invention.
［課題を解決するための手段］ 即ち、本発明によれば、噴霧乾燥装置の乾燥室を構成
するフィルターであって、その通気度が0.5cc/cm2/sec
以上、5.0cc/cm2/sec未満で、その目開きが１〜100μｍ
である噴霧乾燥用多孔質フィルターが提供される。ま
た、本発明では、運転時の通気状態において、多孔質フ
ィルターの形状を、回転円盤型噴霧装置を採用する場合
は天井部が平面又は逆ロート状、圧力ノズル又は２流体
ノズルで噴霧する場合は天井部がロート状、側面部が円
筒状、底部がロート状を呈し、ロート状底部の傾斜角度
が30〜150゜となるように形成する。このように形成す
れば、ロート状底部を下方から支持する必要もなく好ま
しい。また、この形状は、多孔質フィルターの天井部を
噴霧乾燥装置のヘッド部（ここに、噴霧ノズル、噴霧円
盤等の噴霧手段が設置される。）と接続・固定し、多孔
質フィルターの底部を粉体取出口に接続・固定すること
により、常に安定して維持される。[Means for Solving the Problems] That is, according to the present invention, there is provided a filter constituting a drying chamber of a spray drying apparatus, the air permeability of which is 0.5 cc / cm 2 / sec.
Above, less than 5.0 cc / cm 2 / sec, the aperture is 1 to 100 μm
Is provided. In the present invention, in the ventilation state during operation, the shape of the porous filter, when the rotating disk type spraying device is adopted, when the ceiling is flat or inverted funnel, when the pressure nozzle or two-fluid nozzle sprays The ceiling has a funnel shape, the side surface has a cylindrical shape, and the bottom has a funnel shape. The funnel-shaped bottom has an inclination angle of 30 to 150 °. This is preferable because the funnel-shaped bottom does not need to be supported from below. Further, in this shape, the ceiling of the porous filter is connected and fixed to the head of the spray-drying device (where spray means such as a spray nozzle and a spray disk are installed), and the bottom of the porous filter is fixed. By connecting and fixing to the powder outlet, it is always kept stable.
さらに、多孔質フィルターの縫い目が垂直方向となる
ように乾燥室全体を構成すると、縫い目を水平方向に形
成した場合のように縫い目付近に生成される粉粒体の堆
積が起こらず、多孔質フィルターに付着し難くなり好ま
しい。なお、天井部においては、粉粒体は落下しやすい
ので縫い目の方向を限定する必要はない。Furthermore, when the entire drying chamber is configured so that the seams of the porous filter are vertical, the accumulation of powder and granules generated near the seam does not occur as in the case where the seams are formed in the horizontal direction. It is difficult to adhere to the surface, which is preferable. In the ceiling portion, the direction of the seam does not need to be limited because the granular material easily falls.
［作用］ 本発明の多孔質フィルターは、特定の範囲の通気度及
び目開きを有することに特徴がある。[Action] The porous filter of the present invention is characterized by having a specific range of air permeability and mesh size.
噴霧乾燥装置の運転条件は、処理量の大小（即ち、装
置の大型、小型）、噴霧乾燥の対象原液の種類などによ
り変化するものであるが、本発明者が種々実験、検討を
行なったところ、運転条件の広い範囲に亙って、特定の
範囲の通気度あるいは目開きを有する多孔質フィルター
で噴霧乾燥室を構成することにより、粉塵漏れが生じ
ず、安定した噴霧乾燥が行なえることを見出した。The operating conditions of the spray drying apparatus vary depending on the processing amount (that is, the apparatus is large or small), the type of the stock solution to be spray-dried, and the like. The inventor conducted various experiments and studies. By configuring the spray drying chamber with a porous filter having a specific range of air permeability or opening over a wide range of operating conditions, dust leakage does not occur and stable spray drying can be performed. I found it.
本発明においては、多孔質フィルターの通気度を0.5c
c/cm2/sec以上、5.0cc/cm2/sec未満とする。この通気度
の範囲は、多孔質フィルターに強い付着又は堆積を形成
させない範囲であり、噴霧乾燥装置の運転が安定する。
特に、通気度を低く安定させることで、多孔質フィルタ
ーへの粉塵付着が抑えられ、かつ粉塵漏れを防止するの
である。通気度が0.5cc/cm2/sec未満の場合には、噴霧
乾燥運転に際して内外圧力差が大きくなり過ぎ、安定し
た運転ができない。In the present invention, the air permeability of the porous filter is 0.5c
c / cm 2 / sec or more and less than 5.0 cc / cm 2 / sec. This range of the air permeability is a range in which strong adhesion or deposition is not formed on the porous filter, and the operation of the spray drying device is stabilized.
In particular, by stabilizing the air permeability to a low level, dust adhesion to the porous filter is suppressed, and dust leakage is prevented. When the air permeability is less than 0.5 cc / cm 2 / sec, the pressure difference between the inside and outside becomes too large during the spray drying operation, and stable operation cannot be performed.
また、本発明の多孔質フィルターの目開きについて
は、基本的には粉粒体の形状・大きさに関係するもので
あるが、種々検討の結果、多孔質フィルターの目開きが
１〜100μｍ、好ましくは２〜50μｍとすることにより
粉塵漏れが防止される。多孔質フィルターの目開きが１
μｍ未満の場合、内外圧力差が大きくなり過ぎ安定した
噴霧乾燥運転ができず、一方、目開きが100μｍを超え
ると粉塵漏れが生じる。In addition, the aperture of the porous filter of the present invention is basically related to the shape and size of the granular material, but as a result of various studies, the aperture of the porous filter is 1 to 100 μm, By setting the thickness to preferably 2 to 50 μm, dust leakage is prevented. The aperture of the porous filter is 1
If it is less than μm, the pressure difference between the inside and the outside becomes too large and a stable spray drying operation cannot be performed. On the other hand, if the opening exceeds 100 μm, dust leakage occurs.
なお、上記の通気度、目開きは下記のように測定し
た。In addition, the above-mentioned air permeability and aperture were measured as follows.
多孔質フィルターの通気度は、JIS Ｌ 1096のＡ法
に基いて測定した。すなわち、フラジール形試験機を用
い、円筒の一端に試験片を取り付けた後、加減抵抗器に
よって傾斜形気圧計が水柱1.27cm（124.5Pa）の圧力を
示すように吸込みファンを調整し、そのときの垂直形気
圧計の示す圧力と、使用した空気孔の種類とから、試験
機に付属の表によって試験片を通過する空気量（cc/cm2
/sec）を求め、これを通気度とした。The air permeability of the porous filter was measured based on the method A of JIS L 1096. That is, using a Frazier type testing machine, after attaching the test piece to one end of the cylinder, adjust the suction fan with a rheostat so that the tilt type barometer indicates a pressure of 1.27 cm (124.5 Pa) of water column. From the pressure indicated by the vertical barometer and the type of air holes used, the amount of air (cc / cm 2
/ sec), which was taken as the air permeability.
多孔質フィルターの目開きは、顕微鏡下での計測によ
り求めた。濾材（フィルター）の間隙を通過できる最大
球状粒子径を本発明では目開きとした。すなわち、観測
できる目開きの短径部分の最大値を採用した。The aperture of the porous filter was determined by measurement under a microscope. In the present invention, the maximum spherical particle diameter that can pass through the gap of the filter medium (filter) is defined as the aperture. That is, the maximum value of the observable minor diameter portion of the aperture was adopted.
本発明に使用する多孔質フィルターは、耐熱性で且つ
剥離性に優れたものであることが好ましい。すなわち、
噴霧乾燥室内に導入される熱風温度は通常200〜280℃程
度と高温であり、フィルターを通過する温度も50〜150
℃であるため、これに耐えられるものでなくてはなら
ず、また、粉粒体が常に付着、堆積するから、連続使用
するためには良剥離性のものであることが望ましい。こ
の多孔質フィルターは着脱自在に取付けられており、随
時取り替え可能となっている。そして、この多孔質フィ
ルターは対象となる製品粉粒体とガスとの分離、即ち、
粉粒体の回収を行なうものである。It is preferable that the porous filter used in the present invention has high heat resistance and excellent releasability. That is,
The temperature of hot air introduced into the spray drying chamber is usually as high as about 200 to 280 ° C, and the temperature passing through the filter is also 50 to 150
Since the temperature is ° C., it must be able to withstand this. In addition, since the granular material always adheres and accumulates, it is desirable that the material has good peelability for continuous use. This porous filter is detachably mounted and can be replaced at any time. And this porous filter separates the target product powder and gas, that is,
This is to collect the powder.
このような機能を奏する多孔質フィルターとしては、
特にその種類を限定するものではないが、織布、不織布
等の繊維製の布やそれらの表面に多孔質フィルムを接合
した組合せ膜が用いられる。多孔質フィルターの材質と
しては、耐熱ナイロン、ポリエステル、ポリイミド、ポ
リアミド、ポリフェニルサルファイド等が用いられる。
また、多孔質フィルムとしてはポリテトラフルオロエチ
レン（PTFE）、ポリトリフルオロエチレン等が用いられ
る。次に、本発明の多孔質フィルターを図面に基き説明
する。As a porous filter with such a function,
Although the type is not particularly limited, fiber cloths such as woven cloth and non-woven cloth and a combination membrane in which a porous film is bonded to the surface thereof are used. As a material of the porous filter, heat-resistant nylon, polyester, polyimide, polyamide, polyphenylsulfide, or the like is used.
Further, as the porous film, polytetrafluoroethylene (PTFE), polytrifluoroethylene, or the like is used. Next, the porous filter of the present invention will be described with reference to the drawings.
第１図は運転時の本発明の多孔質フィルターの形状の
一例を示す説明図で、この例では天井部１は平面状で、
図示しない噴霧乾燥装置のヘッド部に接続・固定するた
めの接続部２を有している。多孔質フィルターの側面部
３は円筒状を呈するとともに、底部４はロート状を呈し
ており、底部４はその下端部５が図示しない噴霧乾燥装
置の粉体取出口に接続・固定されている。なお、多孔質
フィルターの肩部、即ち天井部１と側面部３の接続部分
にはフック６が設けられ、噴霧乾燥装置の上部固定部に
より吊り下げられる。FIG. 1 is an explanatory view showing an example of the shape of the porous filter of the present invention at the time of operation. In this example, the ceiling 1 is flat,
It has a connection part 2 for connecting and fixing to a head part of a spray drying device not shown. The side portion 3 of the porous filter has a cylindrical shape, the bottom portion 4 has a funnel shape, and the bottom portion 4 has a lower end portion 5 connected and fixed to a powder outlet of a spray dryer (not shown). A hook 6 is provided at a shoulder portion of the porous filter, that is, at a connection portion between the ceiling portion 1 and the side surface portion 3, and is suspended by an upper fixing portion of the spray dryer.
また、乾燥室全体を構成する多孔質フィルターの縫い
目７を垂直方向となるように形成し、粉粒体の多孔質フ
ィルターへの付着を抑制した。Further, the seam 7 of the porous filter constituting the entire drying chamber was formed so as to be in the vertical direction, and the adhesion of the granular material to the porous filter was suppressed.
なお、ロート状底部４の傾斜角度αが30〜150゜、好
ましくは50〜120゜となるように形成すると、下方から
の支持手段を必要とせず上記形状を安定して保持でき
る。When the funnel-shaped bottom 4 is formed so that the inclination angle α is 30 to 150 °, preferably 50 to 120 °, the above shape can be stably held without the need for a support means from below.
上記の如き多孔質フィルターの形状は、多孔質フィル
ターの内部の圧力を外部圧に対して通常10mmH2O以上と
することで保持される。The shape of the porous filter as described above is maintained by setting the internal pressure of the porous filter to 10 mmH 2 O or more with respect to the external pressure.
［実施例］ 以下、本発明を実施例に基いて更に詳細に説明する
が、本発明はこれらの実施例に限られるものではない。[Examples] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.
（実施例） 各種繊維を用いた多孔質フィルターで乾燥室を構成
し、下記の条件で噴霧乾燥を行ない、フィルター特性お
よびフィルターからの粉塵漏れの有無を調べた。(Example) A drying chamber was configured with a porous filter using various fibers, and spray drying was performed under the following conditions, and the filter characteristics and the presence or absence of dust leakage from the filter were examined.
（噴霧乾燥条件） 噴霧乾燥された粉粒体の平均粒子径…10〜200μｍ 熱風入口温度…200〜250℃ 送風量…1000〜1500m3/hr 結果を第１表に示す。(Spray drying conditions) Average particle size of the spray-dried powder: 10 to 200 μm Hot air inlet temperature: 200 to 250 ° C. Air blow rate: 1000 to 1500 m 3 / hr The results are shown in Table 1.
第１表から明らかなように、特定範囲の通気度または
目開きを有する多孔質フィルターを用いた場合には、圧
力損失もそれ程大きくならない範囲で、粉塵漏れが防止
できることがわかる。As is clear from Table 1, when a porous filter having a specific range of air permeability or aperture is used, dust leakage can be prevented within a range where the pressure loss is not so large.
［発明の効果］ 以上説明した通り、本発明によれば、特定範囲の通気
度あるいは目開きを有する多孔質フィルターにより噴霧
乾燥装置の乾燥室を構成したので、噴霧乾燥の運転条件
の如何に拘らず、安定した噴霧乾燥を行ないつつ多孔質
フィルターからの粉塵漏れを起こさないで粉粒体の回収
を行なうことができる。 [Effects of the Invention] As described above, according to the present invention, since the drying chamber of the spray drying device is constituted by the porous filter having a specific range of air permeability or aperture, the operating condition of the spray drying is not limited. In addition, it is possible to recover the powder and granules without causing dust leakage from the porous filter while performing stable spray drying.
第１図は運転時の本発明の多孔質フィルターの形状の一
例を示す説明図である。 １……多孔質フィルターの天井部、２……接続部、３…
…多孔質フィルターの側面部、４……多孔質フィルター
の底部、５……下端部、６……フック、７……縫い目。FIG. 1 is an explanatory diagram showing an example of the shape of the porous filter of the present invention during operation. 1 ... ceiling part of porous filter, 2 ... connection part, 3 ...
... Side faces of the porous filter, 4... Bottom of the porous filter, 5... Lower end, 6... Hook, 7.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高橋 弘毅 東京都中央区日本橋１丁目13番１号 テ ィーディーケイ株式会社内 (72)発明者 大川原 正明 神奈川県横浜市緑区池辺町3847 大川原 化工機株式会社内 (72)発明者 小林 克己 神奈川県横浜市緑区池辺町3847 大川原 化工機株式会社内 (72)発明者 伊藤 崇 神奈川県横浜市緑区池辺町3847 大川原 化工機株式会社内 (56)参考文献 特開 昭62−152501（ＪＰ，Ａ) 特開 昭58−88016（ＪＰ，Ａ) 特開 昭52−1180（ＪＰ，Ａ) 特公 昭57−43212（ＪＰ，Ｂ２) 実公 昭52−28862（ＪＰ，Ｙ２) 実公 昭63−18420（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 1/18 B01D 39/00 - 41/04 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroki Takahashi 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation (72) Inventor Masaaki Okawara 3847 Ikebe-cho, Midori-ku, Yokohama-shi, Kanagawa Okawara Kakohki Co., Ltd. In-house (72) Inventor Katsumi Kobayashi 3847 Ikebe-cho, Midori-ku, Yokohama-shi, Kanagawa Prefecture Inside Okawara Kakoki Co., Ltd. (72) Inventor Takashi Ito 3847 Ikebe-cho, Midori-ku, Yokohama-shi, Kanagawa Prefecture Inside Okawara Kakoki Co., Ltd. (56) Reference Document JP-A-62-152501 (JP, A) JP-A-58-88016 (JP, A) JP-A-52-1180 (JP, A) JP-B-57-43212 (JP, B2) 28862 (JP, Y2) Jiko 63-18420 (JP, Y2) (58) Fields investigated (Int. Cl. 7 , DB name) B01D 1/18 B01D 39/00-41/04
Claims (3)
ーであって、その通気度が0.5cc/cm2/sec以上、5.0cc/c
m2/sec未満で、その目開きが１〜100μｍであることを
特徴とする噴霧乾燥用多孔質フィルター。Claims: 1. A filter constituting a drying chamber of a spray drying apparatus, wherein the air permeability of the filter is 0.5 cc / cm 2 / sec or more and 5.0 cc / c or more.
A porous filter for spray drying, characterized in that the aperture is less than m 2 / sec and the opening is 1 to 100 μm.
ト状、側面部が円筒状、底部がロート状を呈し、ロート
状底部の傾斜角度が30〜150゜である請求項１記載の噴
霧乾燥用多孔質フィルター。2. The spray-drying method according to claim 1, wherein the ceiling has a flat or inverted funnel shape or a funnel shape, the side surface has a cylindrical shape, the bottom has a funnel shape, and the inclination angle of the funnel-shaped bottom is 30 to 150 °. For porous filter.
成されている請求項２記載の噴霧乾燥用多孔質フィルタ
ー。3. The spray-drying porous filter according to claim 2, wherein the seam of the porous filter is formed in a vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27010189A JP3301610B2 (en) | 1989-10-17 | 1989-10-17 | Porous filter for spray drying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27010189A JP3301610B2 (en) | 1989-10-17 | 1989-10-17 | Porous filter for spray drying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03131302A JPH03131302A (en) | 1991-06-04 |
| JP3301610B2 true JP3301610B2 (en) | 2002-07-15 |
Family
ID=17481550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27010189A Expired - Lifetime JP3301610B2 (en) | 1989-10-17 | 1989-10-17 | Porous filter for spray drying |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3301610B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2010234607B2 (en) | 2009-04-09 | 2014-01-16 | Entegrion, Inc | Spray-dried blood products and methods of making same |
| US8407912B2 (en) | 2010-09-16 | 2013-04-02 | Velico Medical, Inc. | Spray dried human plasma |
| US20110142885A1 (en) | 2009-09-16 | 2011-06-16 | Velico Medical, Inc. | Spray-dried human plasma |
| EP2745921A3 (en) | 2010-10-29 | 2014-10-01 | Velico Medical, Inc. | System and Method for Spray Drying a Liquid |
| US20140083628A1 (en) | 2012-09-27 | 2014-03-27 | Velico Medical, Inc. | Spray drier assembly for automated spray drying |
| KR101223781B1 (en) * | 2012-07-03 | 2013-01-17 | 유영덕 | Stretching ceiling construction system and construction method thereof |
| US9561184B2 (en) | 2014-09-19 | 2017-02-07 | Velico Medical, Inc. | Methods and systems for multi-stage drying of plasma |
| US11841189B1 (en) | 2022-09-15 | 2023-12-12 | Velico Medical, Inc. | Disposable for a spray drying system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5228862Y2 (en) * | 1972-03-30 | 1977-07-01 | ||
| JPS521180A (en) * | 1975-06-20 | 1977-01-06 | Mitsubishi Rayon Co | Method of producing fabric for bag filter |
| JPS6318420Y2 (en) * | 1979-04-10 | 1988-05-24 | ||
| JPS56158036A (en) * | 1980-05-12 | 1981-12-05 | Shirou Nukiyama | Improved apparatus in preparing milk powder |
| JPS5888016A (en) * | 1981-11-19 | 1983-05-26 | Teijin Ltd | Heat resistant bag filter |
| JPH0675641B2 (en) * | 1985-12-27 | 1994-09-28 | ティーディーケイ株式会社 | Spray drying method and device |
-
1989
- 1989-10-17 JP JP27010189A patent/JP3301610B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03131302A (en) | 1991-06-04 |
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