JPH03181301A - Porous filter for spray drier - Google Patents
Porous filter for spray drierInfo
- Publication number
- JPH03181301A JPH03181301A JP31765789A JP31765789A JPH03181301A JP H03181301 A JPH03181301 A JP H03181301A JP 31765789 A JP31765789 A JP 31765789A JP 31765789 A JP31765789 A JP 31765789A JP H03181301 A JPH03181301 A JP H03181301A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- porous filter
- spray drying
- woven fabric
- spray
- 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.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims abstract description 17
- 238000001694 spray drying Methods 0.000 claims abstract description 25
- 230000035699 permeability Effects 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims description 36
- 239000002759 woven fabric Substances 0.000 claims description 23
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 8
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000011550 stock solution Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 16
- 239000000428 dust Substances 0.000 abstract description 13
- 239000008187 granular material Substances 0.000 abstract description 4
- 239000004744 fabric Substances 0.000 abstract 2
- 239000011148 porous material Substances 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 101150010264 ppsB gene Proteins 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
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を構威し、生成粉粒体と
ガスとの分離を行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。[Detailed Description of the Invention] [Industrial Application Field] The present invention comprises a drying chamber of a spray drying device, and has air permeability for separating produced powder and granules from gas and recovering the powder and granules. relating to porous filters.
噴霧乾燥は、基本的には■原液の噴霧、■噴霧により生
した微小液滴の乾燥、■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、噴霧、乾燥１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
り換えに応し乾燥室を自在に取換えできる方法及び装置
（特開昭６２−１５２５０１号公報）がある。Spray drying basically required three functions: ■ Spraying the undiluted solution, ■ Drying the minute droplets created by the spray, and ■ Separating and collecting powdered products, but recently, it has been developed to use a high-mix, low-volume production method. In response to the demand for the production of high-purity and high-purity products, a method and device (Japanese Unexamined Patent Publication No. 1983-1986 -152501).
従来の方法及び装置は噴霧乾燥室を多孔質フィルターで
構成することにより、噴霧、乾燥１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。In the conventional method and apparatus, the spray drying chamber is constructed with a porous filter, so that spraying, drying, and separation and collection are performed in the same drying area, and at the same time, the drying chamber can be easily replaced, which is extremely efficient. It is highly practical.
本発明者は、前記多孔質フィルターとして短風維（スパ
ンヤーン）の紡績糸による織布をバッグ状に形成したも
のを使用し、この噴霧乾燥方法及び装置についてさらに
実験を重ねたところ、噴霧乾燥製品（わ）体）中に織布
から発生したケバがｌ尾大していること及び、このケバ
の大半は、乾燥製品が多孔質フィルターに衝突接触する
ことにより発生し、乾燥装置の運転継続後多孔質フィル
ターを７先浄し、これを再度使用する際にも発生するこ
とが確Ｌ？２された。The present inventor used a bag-shaped woven fabric made of spun yarn of short wind fibers (spun yarn) as the porous filter, and conducted further experiments on this spray drying method and apparatus, and found that the spray-dried product (W) There is a large amount of fluff generated from the woven fabric inside the body, and most of this fluff is generated when the dried product collides with the porous filter. Is this likely to occur even when you clean the filter 7 times and use it again? 2 was given.
上記ケバ混入は製品品質を著しく劣悪化するため、従来
のスパンヤーンの織布によるフィルターは噴霧乾燥用に
は不向きである。Since the above-mentioned fluff contamination significantly deteriorates product quality, conventional filters made of spun yarn woven fabrics are unsuitable for spray drying.
また、織布が耐薬品性（特に耐酸性）に優れた繊維で形
成されたものでない場合には長時間の使用に耐えられず
、フィルター交換を頻繁に行わなければならないことや
、従来の耐熱ナイロン繊維は噴霧乾燥製品や噴霧原液の
特性によっては耐久性が不十分であることが判明した。In addition, if the woven fabric is not made of fibers with excellent chemical resistance (especially acid resistance), it will not be able to withstand long-term use, requiring frequent filter replacement, and conventional heat-resistant It has been found that the durability of nylon fibers is insufficient depending on the characteristics of the spray-dried product or the spray concentrate.
さらに、上記噴霧乾燥装置では熱凧送風量、フィルター
内外の圧力差５粉粒体の粒度などの運転条件によりフィ
ルターからの粉塵漏れが生したり、短特間内にフィルタ
ーの目詰まりにより圧力損失が過大となって安定、的確
な運転が継続できなくなるという問題点もあった。Furthermore, in the above-mentioned spray drying equipment, dust leakage from the filter may occur due to operating conditions such as the air flow rate of the hot kite, the pressure difference between the inside and outside of the filter, and the particle size of the powder. There was also the problem that the amount of water became excessive, making it impossible to continue stable and accurate operation.
本発明は、多孔質フィルターを長繊維のマルチフィラメ
ントによる織布で形成すると共に、該フィルターの通気
度及び目開きを適切な範囲に設定することにより上記ケ
バ発生、粉塵漏れ及びフィルクー目詰まりの問題点を解
決し、前記マルチフィラメントを後記する特定の合成ｍ
ｌＩのマルチフィラメントとすることにより耐薬品性良
好な多孔質フィルターとしたものである。The present invention solves the above-mentioned problems of fluff generation, dust leakage, and filter clogging by forming a porous filter with a woven fabric made of multifilament long fibers and setting the air permeability and opening of the filter within an appropriate range. A specific synthesis m which solves the point and describes the multifilament
By using a multifilament of 1I, a porous filter with good chemical resistance can be obtained.
ｃ？Ｒｍを解決するための手段〕
本発明は、バッグ状フィルターで形成した乾燥室内に原
液を微小液滴として噴霧する噴霧乾燥装置において、前
記バッグ状フィルターを長繊維のマルチフィラメントか
らなる経糸、Ｌ９糸による織布で形成すると共に、該フ
ィルターの通気度を０、５〜１５ ｃｃ／ａｊ／ｓｅｃ
、目開きを１Ｏ−１ｏ。c? Means for Solving Rm] The present invention provides a spray drying apparatus that sprays a stock solution as minute droplets into a drying chamber formed by a bag-shaped filter, in which the bag-shaped filter is connected to a warp made of long fiber multifilament, L9 yarn. The filter has an air permeability of 0.5 to 15 cc/aj/sec.
, the opening of the eyes is 1O-1o.
μｍとしたことを特徴とする噴霧乾燥装置用多孔質フィ
ルターである。This is a porous filter for a spray dryer, characterized in that the porous filter has a diameter of μm.
本発明においては、多孔質フィルターの通気度を０．５
〜１５ ｃｃ／ｃ＋Ｊ／ｓｅｃ 、好ましくは１．０〜
８ｃｃ ／ ｃｄ ／ ｓｅｅとするが、この通気度の
範囲は、多孔質フィルターに乾燥製品粉粒体の強い付着
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ご）−７
−名了１暫フノル々−への鉛兜Ｚ汁若貢（曲妾Ａれ、か
つ粉塵漏れが防止できるのである。通気度が０．５ ｃ
ｃ ／ ｃｔＡ／ ｓｅｃ未溝の場合には、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。一方、通気度が１５ｃｃ ／ ｃｍ／ｓｅ
ｃを超えると、多孔質フィルターからの粉塵漏れが生し
る。In the present invention, the air permeability of the porous filter is set to 0.5.
~15 cc/c+J/sec, preferably 1.0~
The air permeability is set to 8 cc/cd/see, but this air permeability range is within a range where dry product powder does not form strong adhesion or accumulation on the porous filter, and the operation of the spray drying apparatus is stable. In particular, keep the air permeability low and stable)-7
- Meiryo 1 Shitaku Funoran - Lead helmet Z soup wakamitsu (music concubine A) and can prevent dust leakage. Air permeability is 0.5 c
c/ctA/sec If there is no groove, the difference in pressure between the inside and outside becomes too large during spray drying operation, making stable operation impossible. On the other hand, the air permeability is 15cc/cm/se
If it exceeds c, dust leaks from the porous filter.
また、本発明の多孔質フィルターの目開きについては、
基本的には前記粉粒体の形状・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
１０〜１００μｍ、好ましくは２０〜５０μｍ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１０μｍ未満、特に１μｍ以下の場合、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しる。Furthermore, regarding the opening of the porous filter of the present invention,
Basically, it is related to the shape and size of the powder, but as a result of various studies, dust leakage can be prevented by setting the opening of the porous filter to 10 to 100 μm, preferably 20 to 50 μm. be done. If the opening of the porous filter is less than 10 μm, particularly 1 μm or less, the difference in pressure between the inside and outside becomes too large, making stable spray drying operation impossible. On the other hand, if the opening exceeds 100 μm, dust leakage occurs.
上記通気度あるいは目開きの織布を構成する経糸、緯糸
の大さくデニール）と、単位面積当たりの経糸、緯糸の
繊維密度とにより決まるものであるが、通気度を０．５
〜１５ｃｃ／ａｄ／ｓｅｃ 、目開き１、 ｌ ４１〜
ｌ ｎ ｎ ｒｒ ｍ Ｊ−すスＬ−けｍ ｔｙ −ｙ
ｔｂ壬フッ＝メントにより織布を形成するだけでは困
難であり、本発明者の検討によると例えば、マルチフィ
ラメン）１本を直径１４〜２０μｍの単糸の集合体とし
て繊度を１００〜４００デニールの範囲内に設定すると
共に、織布の繊維密度を、２５．４ ｍ平方当たり経糸
のマルチフィラメントが１７０〜２１０本、緯糸のマル
チフィラメントが６０〜８０本とし、さらに経糸をマル
チフィラメントの一本又は並列に並べた二本とし、緯糸
を無撚又は弱撚のマルチフィラメントの一本として織布
を形成して達成できるものである。また、マルチフィラ
メントの加熱の強弱や織＆ｌＩ織（平織、綾織等〉を変
えることにより、通気度あるいは目開きを所望範囲に設
定することができ、フィルターの粉塵漏れやフィルター
が早期に目詰まりするトラブルを的確に防止できるもの
である。The air permeability is determined by the above-mentioned air permeability or the size (denier) of the warp and weft that make up the woven fabric, and the fiber density of the warp and weft per unit area.
~15cc/ad/sec, opening 1, l 41~
l n n rr m J-susu L-ke m ty -y
It is difficult to simply form a woven fabric using tb material, and according to the study of the present inventors, for example, multifilament (multifilament) can be made into an aggregate of single yarns with a diameter of 14 to 20 μm and a fineness of 100 to 400 deniers. In addition, the fiber density of the woven fabric is set to 170 to 210 multifilaments in the warp and 60 to 80 multifilaments in the weft per 25.4 m square, and one or more multifilaments in the warp. This can be achieved by forming a woven fabric by using two filaments arranged in parallel and the weft being one non-twisted or weakly twisted multifilament. In addition, by changing the heating strength of the multifilament and the weave and weave (plain weave, twill weave, etc.), the air permeability or opening can be set within the desired range, preventing dust leakage from the filter and early clogging of the filter. This allows trouble to be accurately prevented.
上記のように、噴霧乾燥装置用の多孔質フィルターでは
取扱う原液や乾燥製品の化学的性質を考慮する必要があ
り、特に酸性のものを扱う場合には従来の耐熱ナイロン
等では問題があるので、本発明では耐酸性フィルターを
ポリフェニレンサルファイド繊維（Ｐ Ｐ ｓｍ維）の
マルチフィラメント、ポリテトラフルオロエチレン繊維
（ＰＴＦＥ繊維）のマルチフィラメントのいずれか少な
くとも一方により形成するものである。噴霧乾燥室内に
導入される熱風の温度は通常２００〜２８０℃程度とか
なり高温であり、フィルターを通過する温度も１３０−
１７０℃と高温であるため、噴霧乾燥装置用の多孔質フ
ィルターは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ｆｆ１ｌｌ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で随時取り替え可能に
取付けられ、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うものである。As mentioned above, when using porous filters for spray drying equipment, it is necessary to take into account the chemical properties of the raw solution and dried products that are being handled.Especially when handling acidic products, there are problems with conventional heat-resistant nylon, etc. In the present invention, the acid-resistant filter is formed from at least one of multifilaments of polyphenylene sulfide fibers (PPSM fibers) and multifilaments of polytetrafluoroethylene fibers (PTFE fibers). The temperature of the hot air introduced into the spray drying chamber is usually quite high, around 200-280℃, and the temperature of the air passing through the filter is also 130-280℃.
Because the temperature is as high as 170°C, the porous filter for the spray dryer must be able to withstand this temperature.Also, since powder and granules always adhere and accumulate, a good ff1lll is required for continuous use. It is desirable that it is separable,
This porous filter is attached so as to be detachable and replaceable at any time, and is used to separate the target product powder from gas, that is, to recover the powder.
前記ｐｐｓ繊維、ＰＴＦＥ繊維はこのような耐熱性、良
剥離性（非粘着性〉さらには耐摩耗性にも優れているの
で、この種の多孔質フィルターの構成素材として極めて
好適であり、これらに次ぐものとして耐熱ナイロン（芳
香族ポリアミド）。The above-mentioned pps fibers and PTFE fibers have excellent heat resistance, good releasability (non-adhesiveness), and also excellent abrasion resistance, so they are extremely suitable as constituent materials for this type of porous filter. The second type is heat-resistant nylon (aromatic polyamide).
ポリエステル（例えばポリエチレンテレフタレート）、
ポリイミド、ポリアミド（例えばナイロン６、ナイロン
６６）等を用いることができる。polyester (e.g. polyethylene terephthalate),
Polyimide, polyamide (eg, nylon 6, nylon 66), etc. can be used.
さらに本発明では、運転時の通気状態においてバッグ状
の多孔質フィルターの具体的形状を、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 °、好ましくは５０
〜１２０＠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上記形
状を安定して保持できる。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。Furthermore, in the present invention, in the ventilation state during operation, the specific shape of the bag-like porous filter is adjusted such that when a rotating disk type spray device is adopted, the ceiling part is flat or in the shape of an inverted funnel, and spraying is performed using a pressure nozzle or a two-fluid nozzle. In this case, the ceiling part is funnel-shaped, the side parts are cylindrical, and the bottom part is funnel-shaped, and the funnel-shaped bottom has an inclination angle of 30 to 150 degrees, preferably 50 degrees.
〜120＠. If formed in this way, it is not necessary to support the funnel-shaped bottom from below, and the above-mentioned shape can be stably maintained. In addition, this shape connects and fixes the ceiling of the porous filter to the head of the spray dryer (where spray means such as a spray nozzle and spray disk are installed), and connects and fixes the bottom of the porous filter to the By connecting and fixing it to the body extraction port, it is always maintained stably.
この場合、多孔質フィルター全体をＰＰＳ繊維により、
又はＰＴＦＥ繊維により形成することができ、織布の経
糸、緯糸の一方をｐｐｓＢ維とし、他方をＰＴＦＥ繊維
とすることもできるし、バッグ状フィルターの上方部、
下方部の一方をＰＰＳ繊維で、他方をＰＴＦＥ繊維で形
成することもできる。In this case, the entire porous filter is made of PPS fibers.
Alternatively, it can be formed from PTFE fibers, and one of the warp and weft of the woven fabric can be ppsB fibers and the other is PTFE fibers, and the upper part of the bag-shaped filter,
It is also possible to form one of the lower parts from PPS fibers and the other from PTFE fibers.
多孔質フィルターを長繊維のマルチフィラメントによる
織布で袋状に形成すると共に、フィルターの通気度、目
開きを前記所定範囲に設定したので、噴霧乾燥装置運転
中にケバが発生することはなくなり、しかも粉塵漏れ、
フィルター目詰まりも殆ど発生しないものである。The porous filter is formed into a bag shape using a woven fabric made of multifilament long fibers, and the air permeability and opening of the filter are set within the predetermined ranges, so that fluff does not occur during the operation of the spray dryer. Moreover, dust leaks,
Filter clogging hardly occurs.
また、マルチフィラメントをＰＰＳ繊維又はポリテトラ
フルオロエチレン繊維とすることにより耐薬品性、耐熱
性、耐スチーム性、粉体剥離性。In addition, by using PPS fiber or polytetrafluoroethylene fiber as the multifilament, it has chemical resistance, heat resistance, steam resistance, and powder releasability.
耐摩耗性に優れた多孔質フィルターとなり得るものであ
る。This can be used as a porous filter with excellent abrasion resistance.
さらに、マルチフィラメントの繊度すなわち太さ、繊維
密度等を前記所定範囲内に設定することにより容易に、
多孔質フィルターの通気度、目開きを上記所定範囲に設
定することが可能となり、織布の実質的全面をフィルタ
ーとして機能させることができる。Furthermore, by setting the fineness, i.e., thickness, fiber density, etc. of the multifilament within the predetermined range,
The air permeability and opening of the porous filter can be set within the above-mentioned predetermined ranges, and substantially the entire surface of the woven fabric can function as a filter.
以下、本発明を実施例に基づいて更に詳細に説明するが
、本発明はこの実施例に限られるものではない。Hereinafter, the present invention will be explained in more detail based on Examples, but the present invention is not limited to these Examples.
第１図は運転時の本発明の織布による多孔質フィルター
の形状を示す説明図で、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へノド部に接続・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。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足部により
吊り下げられる。FIG. 1 is an explanatory diagram showing the shape of the porous filter made of the woven fabric of the present invention during operation. In this example, the ceiling part 1 is flat, and is used for connecting and fixing to the nodal part of a spray drying device (not shown). It has a connecting part 2. The side surface 3 of the porous filter has a cylindrical shape, and the bottom 4 has a funnel shape, and the lower end 5 of the bottom 4 is connected and fixed to a powder outlet of a spray drying device (not shown). A hook 6 is provided at the shoulder part of the porous filter, that is, the connection part between the ceiling part 1 and the side part 3, and is suspended from the upper fixed leg part of the spray drying apparatus.
なお、ロート状底部部４の傾斜角度αは約５０゜であり
、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１０ｎＨ，０以
上とすることで保持される。Incidentally, the inclination angle α of the funnel-shaped bottom portion 4 is approximately 50°, and the shape of the porous filter as described above is such that the internal pressure of the porous filter is normally 10 nH, 0 or more relative to the external pressure. Retained.
各種繊維のマルチフィラメントによる織布を用いた多孔
質フィルターで乾燥室を構威し、下記の条件で噴霧乾燥
を行い、フィルター特性、フィルターからの粉塵漏れの
有無及び乾燥製品へのケバ混入の有色等を調べた。A drying room is constructed with a porous filter using a woven fabric made of multifilaments of various fibers, and spray drying is performed under the following conditions to determine the filter characteristics, the presence or absence of dust leakage from the filter, and the color of fluff mixed into the dried product. etc. were investigated.
比較例として、従来のスパンヤーン繊維による織布を用
いて同様の試験を行った。As a comparative example, a similar test was conducted using a woven fabric made of conventional spun yarn fibers.
１、噴霧乾燥条件
■ 噴霧乾燥された粉粒体の平均粒子径・・・１０〜２
００μｍ
■ 熱風入口温度・・・２００〜２５０℃■ 送風！
−１０００〜１５００ｍ／ｈｒ２、粘果
結果を第１表に示す。1. Spray drying conditions■ Average particle diameter of spray-dried powder...10-2
00μm ■Hot air inlet temperature...200~250℃■ Blow!
-1000 to 1500 m/hr2, the results are shown in Table 1.
なお、多孔質フィルターの通気度は、ＪＩＳＬ１０９６
のＡ法に基づいて測定した。すなわち、フラジール形試
験機を用い、円筒の一端に織布の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１．２７ｃａ
（１２４，５Ｉ’ａ）の圧力を示すように吸込ファン
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 ／ ｃｔＡ ／ ５ｅｅ
）を求め、これを通気度とした。In addition, the air permeability of the porous filter is JISL1096.
It was measured based on method A. That is, using a Frazier type tester, a woven fabric test piece was attached to one end of the cylinder, and then a rheostat was used to measure the slope type barometer at a water column of 1.27 ca.
Adjust the suction fan so that it shows the pressure of (124,5I'a), and then select the test piece according to the pressure shown by the vertical barometer and the type of air hole used, according to the table attached to the testing machine. Amount of air passing through (cc/ctA/5ee
) was determined and used as the air permeability.
一方、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。織布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。On the other hand, the opening 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 gaps in the woven fabric is defined as the opening.
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。In other words, the maximum value of the short diameter portion of the observable eye opening was adopted.
また、乾燥製品中へのケバ混入の有無については、噴霧
乾燥装置の運転中、適宜に微粉体乾燥製品をサンプリン
グすると共に、運転を停止し多孔質フィルターへの付着
微粉体を払い落とす時に回収される微ワ）体をサンプリ
ングし、顕微鏡観察により調査した。In addition, to check whether fluff is mixed into the dried product, the fine powder dried product is sampled at appropriate times during the operation of the spray dryer, and the fine powder adhering to the porous filter is collected when the spray dryer is stopped and the fine powder adhering to the porous filter is shaken off. The microscopic body was sampled and investigated by microscopic observation.
以下余白
〔註〕
（１１単糸直径：マルチフィラメントでは、これを構成
する単糸の直径であり、スパンヤーンでは紡績糸を構成
する短礒維（ファイバー）１本の直径である
（２）繊維密度二単位は２５．４ｍｍ平方当たりの本数
＋３１ ｉｆ！ｌ気度：単位はｃｃ ／ ｃｄ ／
５ｅｃ（４）耐、熱性、耐薬品性、総合評価：◎−＝・
−特に良好
○−−−−−−−−良好
△−−−−−−− やや不良
（５）従来のスパンヤーンであり、繊度は番手で表示し
た
第１表に示すように、本発明の多孔質フィルターでは長
時間運転及び、前記付着微粉体払い落としを行ったにも
拘らず、ケバ混入は全く認められなかった。Margins below [Note] (11 Single yarn diameter: For multifilament, it is the diameter of the single yarn that makes up the filament, and for spun yarn, it is the diameter of one short fiber that makes up the spun yarn. (2) Fiber density 2 units are the number of pieces per 25.4 mm square + 31 if!l air temperature: the units are cc / cd /
5ec (4) resistance, heat resistance, chemical resistance, overall evaluation: ◎-=・
- Particularly good - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Slightly poor (5) Conventional spun yarn, and the fineness of the present invention is as shown in Table 1, which shows the fineness by count. Even though the quality filter was operated for a long time and the adhering fine powder was removed, no fluff was observed at all.
これに対し、従来のスパンヤーンの繊維を適用した多孔
質フィルター（試験番号１０．ＩＩ）では乾燥′Ａ装運
転開始して間もない間、ケバ混入が発生した。On the other hand, in the porous filter to which conventional spun yarn fibers were applied (Test No. 10.II), fluff was mixed in shortly after the start of the drying operation.
また、第１表から、マルチフィラメントの織布からなり
前記特定範囲の通気度及び目開きを有する多孔質フィル
ターを用いた場合には、ケバ混入が発生せず、圧力ｔＵ
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
こと及び、マルチフィラメントの素材としてＰＰＳ又は
ＰＴＦＥを適用することにより高性能で耐久性に優れた
多孔質フィルターが得られることがわかる。Furthermore, from Table 1, when using a porous filter made of multifilament woven fabric and having an air permeability and aperture size within the above-mentioned specific range, fluff contamination does not occur and the pressure tU
It can be seen that dust leakage can be prevented to the extent that the loss is not too large, and that a porous filter with high performance and excellent durability can be obtained by using PPS or PTFE as the material for the multifilament.
以上説明した通り本発明によれば、噴霧乾燥室を形成す
るバッグ状の多孔質フィルターを長繊維のマルチフィラ
メントからなる経糸、緯糸による織布で形成すると共に
、フィルターの通気度、目開きを所定範囲に設定したの
で、ケバが混入しない良質の乾燥製品を得ることができ
、フィルターの目詰まりや粉塵漏れも発生せず噴霧乾燥
を長時間安定して継続することができるものである。ま
た、マルチフィラメントをＰＰＳ繊維又はＰ Ｔ Ｆ
Ｅ 繊維とすることにより多孔質フィルターの耐久性が
向上し、これを頻繁に交換する必要もなくなる効果があ
る。As explained above, according to the present invention, the bag-shaped porous filter forming the spray drying chamber is formed of a woven fabric with warp and weft made of long multifilament fibers, and the air permeability and opening of the filter are adjusted to a predetermined value. Since the drying temperature is set within this range, it is possible to obtain a high-quality dried product that does not contain fluff, and spray drying can be stably continued for a long time without clogging the filter or leaking dust. In addition, multifilament can be made from PPS fiber or PTF
E By using fibers, the durability of the porous filter is improved and there is no need to replace it frequently.
第１図は、本発明の実施例に係る多孔質フィルターの形
状を示す説明図である。
ｌ・・・天井部、２・・・接続部、３・・・側面部、４
・・・底部、５・・・下端部、６・・・フック。FIG. 1 is an explanatory diagram showing the shape of a porous filter according to an example of the present invention. l...Ceiling part, 2...Connection part, 3...Side part, 4
...bottom, 5...lower end, 6...hook.
Claims (4)
微小液滴として噴霧する噴霧乾燥装置において、前記バ
ッグ状フィルターを長繊維のマルチフィラメントからな
る経糸、緯糸による織布で形成すると共に、該フィルタ
ーの通気度を０．５〜１５ｃｃ／ｃｍ＾３／ｓｅｃ、目
開きを１０〜１００μｍとしたことを特徴とする噴霧乾
燥装置用多孔質フィルター。(1) In a spray drying device that sprays a stock solution as minute droplets into a drying chamber formed by a bag-shaped filter, the bag-shaped filter is formed of a woven fabric with warps and wefts made of long fiber multifilaments, and the filter A porous filter for a spray dryer, characterized in that the air permeability is 0.5 to 15 cc/cm^3/sec and the opening is 10 to 100 μm.
の単糸の集合体であって繊度が１００〜４００デニール
の範囲内にあり、前記織布は、繊維密度を２５．４ｍｍ
平方当たり経糸のマルチフィラメント１７０〜２１０本
、緯糸のマルチフィラメント６０〜８０本の範囲内とし
、経糸をマルチフィラメントの一本又は並列に配列した
二本とし、緯糸を無撚又は弱撚のマルチフィラメントの
一本として織成した請求項１記載の噴霧乾燥装置用多孔
質フィルター。(2) The multifilament has a diameter of 14 to 20 μm
The woven fabric is an aggregate of single yarns with a fineness in the range of 100 to 400 deniers, and the woven fabric has a fiber density of 25.4 mm.
The range is 170 to 210 multifilaments for the warp and 60 to 80 multifilaments for the weft per square, the warp is one multifilament or two multifilaments arranged in parallel, and the weft is a non-twisted or lightly twisted multifilament. 2. The porous filter for spray drying equipment according to claim 1, which is woven as a single piece.
をポリフェニレンサルファイド繊維又はポリテトラフル
オロエチレン繊維とした請求項１又は２記載の噴霧乾燥
装置用多孔質フィルター。(3) The porous filter for a spray drying apparatus according to claim 1 or 2, wherein at least a part of the warp and/or weft of the woven fabric is made of polyphenylene sulfide fiber or polytetrafluoroethylene fiber.
リフェニレンサルファイド繊維又はポリテトラフルオロ
エチレン繊維の経糸と緯糸で形成した請求項１又は２記
載の噴霧乾燥装置用多孔質フィルター。(4) The porous filter for a spray drying apparatus according to claim 1 or 2, wherein the upper part or the lower part of the bag-shaped filter is formed of warps and wefts of polyphenylene sulfide fibers or polytetrafluoroethylene fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1317657A JPH0677641B2 (en) | 1989-12-08 | 1989-12-08 | Porous filter for spray dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1317657A JPH0677641B2 (en) | 1989-12-08 | 1989-12-08 | Porous filter for spray dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03181301A true JPH03181301A (en) | 1991-08-07 |
| JPH0677641B2 JPH0677641B2 (en) | 1994-10-05 |
Family
ID=18090585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1317657A Expired - Lifetime JPH0677641B2 (en) | 1989-12-08 | 1989-12-08 | Porous filter for spray dryer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0677641B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8407912B2 (en) | 2010-09-16 | 2013-04-02 | Velico Medical, Inc. | Spray dried human plasma |
| US8533972B2 (en) | 2010-10-29 | 2013-09-17 | Velico Medical, Inc. | System and method for spray drying a liquid |
| US9867782B2 (en) | 2009-04-09 | 2018-01-16 | Entegrion, Inc. | Spray-dried blood products and methods of making same |
| US10251911B2 (en) | 2009-09-16 | 2019-04-09 | Entegrion, Inc. | Spray dried human plasma |
| US10843100B2 (en) | 2010-10-29 | 2020-11-24 | Velico Medical, Inc. | Spray drier assembly for automated spray drying |
| US11052045B2 (en) | 2014-09-19 | 2021-07-06 | Velico Medical, Inc. | Formulations and methods for contemporaneous stabilization of active proteins during spray drying and storage |
| US11841189B1 (en) | 2022-09-15 | 2023-12-12 | Velico Medical, Inc. | Disposable for a spray drying system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62152501A (en) * | 1985-12-27 | 1987-07-07 | Tdk Corp | Spray drying method and apparatus |
-
1989
- 1989-12-08 JP JP1317657A patent/JPH0677641B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62152501A (en) * | 1985-12-27 | 1987-07-07 | Tdk Corp | Spray drying method and apparatus |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9867782B2 (en) | 2009-04-09 | 2018-01-16 | Entegrion, Inc. | Spray-dried blood products and methods of making same |
| US11213488B2 (en) | 2009-04-09 | 2022-01-04 | Entegrion, Inc. | Spray-dried blood products and methods of making same |
| US10251911B2 (en) | 2009-09-16 | 2019-04-09 | Entegrion, Inc. | Spray dried human plasma |
| US8407912B2 (en) | 2010-09-16 | 2013-04-02 | Velico Medical, Inc. | Spray dried human plasma |
| US8434242B2 (en) | 2010-09-16 | 2013-05-07 | Velico Medical, Inc. | Spray dried human plasma |
| US8595950B2 (en) | 2010-10-29 | 2013-12-03 | Velico Medical, Inc. | System and method for spray drying a liquid |
| US8601712B2 (en) | 2010-10-29 | 2013-12-10 | Velico Medical, Inc. | System and method for spray drying a liquid |
| US8533972B2 (en) | 2010-10-29 | 2013-09-17 | Velico Medical, Inc. | System and method for spray drying a liquid |
| US10843100B2 (en) | 2010-10-29 | 2020-11-24 | Velico Medical, Inc. | Spray drier assembly for automated spray drying |
| US11052045B2 (en) | 2014-09-19 | 2021-07-06 | Velico Medical, Inc. | Formulations and methods for contemporaneous stabilization of active proteins during spray drying and storage |
| US11806431B2 (en) | 2014-09-19 | 2023-11-07 | Velico Medical, Inc. | Formulations and methods for contemporaneous stabilization of active proteins during spray drying and storage |
| US11841189B1 (en) | 2022-09-15 | 2023-12-12 | Velico Medical, Inc. | Disposable for a spray drying system |
| US11913723B1 (en) | 2022-09-15 | 2024-02-27 | Velico Medical, Inc. | Baffle plate used in a disposable for a spray drying system |
| US11913722B1 (en) | 2022-09-15 | 2024-02-27 | Velico Medical, Inc. | Rapid spray drying system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0677641B2 (en) | 1994-10-05 |
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