JP3021092B2 - Solvent recovery method - Google Patents
Solvent recovery methodInfo
- Publication number
- JP3021092B2 JP3021092B2 JP3142614A JP14261491A JP3021092B2 JP 3021092 B2 JP3021092 B2 JP 3021092B2 JP 3142614 A JP3142614 A JP 3142614A JP 14261491 A JP14261491 A JP 14261491A JP 3021092 B2 JP3021092 B2 JP 3021092B2
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- gas
- inert gas
- circulating
- desorption
- 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
Landscapes
- Treating Waste Gases (AREA)
- Separation Of Gases By Adsorption (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶剤含有粘着剤の乾燥
設備に適用して好適な溶剤回収方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering a solvent, which is suitable for drying a solvent-containing pressure-sensitive adhesive.
【０００２】[0002]
【従来の技術】図２に窒素ガスなどの不活性ガスの循環
によるクローズド方式を用いた従来の低温凝縮溶剤回収
装置を示す。この実施例は溶剤回収装置をテープへの粘
着剤乾燥設備に適用した例を示すもので、図中、１は粘
着テープ、２はテープ支持ロール、３は粘着剤含有溶
剤、４は粘着剤塗布ロールを示している。この粘着剤塗
布ロール４の後段にドライヤ５が設けられ、その中には
加熱ガス吹出口６及び溶剤含有ガス吸入口７が配置され
ている。溶剤含有ガス吸入口７は溶剤凝縮用冷却器８、
ガス循環ブロア９及び乾燥用循環ガス加熱器１０を介し
て加熱ガス吹出口６に接続されて循環不活性ガスのクロ
ーズされた循環系を構成している。また、ガス循環ブロ
アの出口側には循環不活性ガスの一部をブロー排気する
系統及び補給用不活性ガスを系内に導入する系統が設け
られている。2. Description of the Related Art FIG. 2 shows a conventional low-temperature condensed solvent recovery apparatus using a closed system in which an inert gas such as nitrogen gas is circulated. This embodiment shows an example in which a solvent recovery apparatus is applied to an equipment for drying an adhesive on a tape. Indicates a role. A dryer 5 is provided downstream of the pressure-sensitive adhesive application roll 4, and a heated gas outlet 6 and a solvent-containing gas inlet 7 are arranged in the dryer 5. The solvent-containing gas inlet 7 is provided with a solvent condensing cooler 8,
It is connected to the heated gas outlet 6 via a gas circulation blower 9 and a drying circulation gas heater 10 to constitute a closed circulation system of the circulating inert gas. At the outlet side of the gas circulation blower, a system for blowing and exhausting a part of the circulating inert gas and a system for introducing a supply inert gas into the system are provided.
【０００３】上記構成において、テープ支持ロール２で
支持された粘着テープ１は粘着剤塗布ロール４によって
粘着剤含有溶剤３が塗布されてドライヤ５内に送られ
る。ドライヤ５内では、加熱ガス吹出口６より高温の不
活性ガスが吹きつけられて、溶剤を蒸発させ、粘着剤の
みを粘着テープ１の表面に残留させる。In the above configuration, the adhesive tape 1 supported by the tape support roll 2 is coated with the adhesive-containing solvent 3 by the adhesive coating roll 4 and sent into the dryer 5. In the dryer 5, a high-temperature inert gas is blown from the heated gas blowout port 6 to evaporate the solvent and leave only the adhesive on the surface of the adhesive tape 1.
【０００４】ドライヤ５内で蒸発した溶剤は溶剤含有ガ
ス吸入口７より循環不活性ガスと一緒に吸引され、溶剤
凝縮用冷却器８で冷却されることにより、溶剤蒸気は凝
縮液化し、回収溶剤として回収される。The solvent evaporated in the dryer 5 is sucked together with a circulating inert gas from a solvent-containing gas inlet 7 and cooled by a solvent condensing cooler 8, whereby the solvent vapor is condensed and liquefied, and the recovered solvent is condensed. Will be collected as
【０００５】溶剤凝縮用冷却器８の出口からは、冷却さ
れた温度での飽和蒸気圧分の溶剤のみを含有した不活性
ガスが排出され、ガス循環ブロワ９を経て、乾燥用循環
ガス加熱器１０により加熱された後、再び加熱ガス吹出
し口６より乾燥用高温ガスとして吹きつけられる。An inert gas containing only the solvent corresponding to the saturated vapor pressure at the cooled temperature is discharged from the outlet of the solvent condensing cooler 8, and is passed through a gas circulating blower 9 to a drying circulating gas heater. After being heated by 10, it is blown again as a hot gas for drying from the heated gas outlet 6.
【０００６】なお、外部大気混入によりドライヤ５内の
酸素濃度が上昇すると、溶剤による爆発の危険があるた
め、ガス循環ブロア９より循環不活性ガスの一部をブロ
ー排気すると同時に、乾燥用循環ガス加熱器１０の入口
にブロー排気と同量の補給用不活性ガスを導入してい
る。If the oxygen concentration in the dryer 5 rises due to external air mixing, there is a risk of explosion due to the solvent. Therefore, a part of the circulating inert gas is blown out from the gas circulating blower 9 and the circulating gas for drying is simultaneously discharged. At the inlet of the heater 10, the same amount of replenishing inert gas as the blow exhaust is introduced.
【０００７】[0007]
【発明が解決しようとする課題】このように、ドライヤ
５内の酸素濃度の上昇を防ぎ、溶剤による火災、爆発を
防止するためには、循環不活性ガスの一部を系外へ排気
し、新鮮な不活性ガスを連続的に補給する必要がある。As described above, in order to prevent an increase in the oxygen concentration in the dryer 5 and to prevent fire and explosion due to the solvent, a part of the circulating inert gas is exhausted to the outside of the system. It is necessary to continuously supply fresh inert gas.
【０００８】しかし、ブロー排気中には数千ｐｐｍ〜数
％の高濃度溶剤が含まれており、溶剤回収効率の低下及
び、環境汚染の問題が生じている。[0008] However, blow exhaust contains a high concentration solvent of several thousand ppm to several percent, which causes a problem of reduced solvent recovery efficiency and environmental pollution.
【０００９】本発明は上記事情にかんがみてなされたも
ので、ブロー排気中の高濃度溶剤の回収効率を上げて環
境汚染の防止を図った溶剤回収方法を提供することを目
的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of recovering a solvent in which the efficiency of recovering a high-concentration solvent in blow exhaust gas is increased to prevent environmental pollution.
【００１０】[0010]
【課題を解決するための手段】上記目的に対し、本発明
によれば、ドライヤから吸入した溶剤含有の循環不活性
ガスを冷却して溶剤を凝縮回収し、凝縮回収後の循環不
活性ガスの一部を循環系外へブロー排気すると共にブロ
ー排気と同量の不活性ガスを系内に補給し、補給された
循環不活性ガスを加熱して前記ドライヤへ導入してなる
溶剤回収方法において、前記ブロー排気はその中の溶剤
を吸着回収してから排出させ、補給用の不活性ガスを加
熱して吸着溶剤の脱着用ガスにし、脱着された溶剤をそ
の脱着用ガスと共に系内に導入するようにした溶剤回収
方法が提供される。According to the present invention, in order to solve the above-mentioned problems, according to the present invention, a solvent-containing circulating inert gas sucked from a dryer is cooled to condense and recover the solvent. A solvent recovery method comprising blowing a part of the gas to the outside of the circulation system and supplying the same amount of inert gas as the blow gas to the system, heating the supplied circulating inert gas and introducing the gas into the dryer. The blow exhaust discharges the solvent therein by adsorbing and recovering it and then discharges it, heats the replenishment inert gas to make the gas for desorption of the adsorption solvent, and introduces the desorbed solvent into the system together with the desorption gas. Thus, a method for recovering a solvent is provided.
【００１１】[0011]
【作用】上記手段によれば、溶剤を凝縮回収した後の循
環不活性ガスのブロー排気中に残留する溶剤を吸着能の
高い低温で吸着剤に吸着させて、溶剤蒸気濃度を十分に
低くさせ、浄化されたガスのみが排出される。吸着され
た溶剤の脱着は補給用不活性ガスを加熱した高温ガスで
行い、吸着溶剤脱着後の溶剤含有高温不活性ガスはその
まま循環不活性ガス系統に導入される。溶剤の吸着剤と
の吸着及び脱着はロータ式の吸着回収装置を用いること
により、連続して行うことができる。According to the above means, the solvent remaining in the blown exhaust gas of the circulating inert gas after the solvent has been condensed and recovered is adsorbed by the adsorbent at a low temperature having a high adsorbing ability to sufficiently lower the solvent vapor concentration. Only the purified gas is discharged. Desorption of the adsorbed solvent is carried out with a high-temperature gas obtained by heating a replenishment inert gas, and the solvent-containing high-temperature inert gas after desorption of the adsorption solvent is directly introduced into a circulating inert gas system. Adsorption and desorption of the solvent with the adsorbent can be performed continuously by using a rotor-type adsorption and recovery device.
【００１２】[0012]
【実施例】図１は本発明による溶剤回収方法を例示した
ものであり、図中、図２に示したものと同一要素には同
一の符号を付してある。本発明においては、ブロー排気
系統及び補給用不活性ガス系統にロータ式溶剤吸着回収
装置１１の溶剤吸着ゾーン１２及び吸着溶剤脱着ゾーン
１３がそれぞれ位置するよう接続されており、溶剤吸着
ゾーン１２の出口は回収装置へ接続され、吸着溶剤脱着
ゾーン１３の入口は脱着用不活性ガス加熱器１４に接続
されている。この脱着用不活性ガス加熱器１４の入口に
は、補給用不活性ガスが脱着用不活性ガスとして供給さ
れる。FIG. 1 illustrates a solvent recovery method according to the present invention. In the figure, the same elements as those shown in FIG. 2 are denoted by the same reference numerals. In the present invention, the solvent exhaust zone 12 and the adsorption solvent desorption zone 13 of the rotor type solvent adsorption and recovery device 11 are connected to the blow exhaust system and the replenishment inert gas system, respectively. Is connected to a recovery device, and the inlet of the adsorption solvent desorption zone 13 is connected to an inert gas heater 14 for desorption. A supply inert gas is supplied to the inlet of the desorption inert gas heater 14 as the desorption inert gas.
【００１３】粘着剤塗布ロール４によって粘着剤含有溶
剤３が塗布された粘着テープ１は、テープ支持ロール２
で支持されてドライヤ５内に送られ、加熱ガス吹出口６
より吹きつけられた高温不活性ガスにより溶剤を蒸発乾
燥し、粘着剤のみテープ１表面に残留させる。The pressure-sensitive adhesive tape 1 coated with the pressure-sensitive adhesive-containing solvent 3 by the pressure-sensitive adhesive coating roll 4 is a tape supporting roll 2
And is sent into the dryer 5 and the heated gas outlet 6
The solvent is evaporated and dried by the sprayed high-temperature inert gas, and only the adhesive remains on the surface of the tape 1.
【００１４】ドライヤ５内で蒸発した溶剤は、溶剤含有
ガス吸入口７より循環不活性ガスと一緒に吸引され、溶
剤凝縮用冷却器８で冷却されることにより、溶剤蒸気は
凝縮液化し、回収溶剤として回収される。The solvent evaporated in the dryer 5 is sucked together with the circulating inert gas from a solvent-containing gas inlet 7 and cooled by a solvent condensing cooler 8, whereby the solvent vapor is condensed and liquefied and recovered. Recovered as solvent.
【００１５】溶剤凝縮用冷却器８の出口からは、冷却さ
れたガス温度での飽和蒸気圧分の溶剤を含有した不活性
ガスが排出され、その一部は、ガス循環ブロア９の出口
よりロータ式溶剤吸着回収装置１１の溶剤吸着ゾーン１
２に送られ、吸着剤により溶剤蒸気のみが除去され、浄
化ガスとして系外に排出される。From the outlet of the solvent condensing cooler 8, an inert gas containing a solvent corresponding to the saturated vapor pressure at the cooled gas temperature is discharged. Adsorption zone 1 of the solvent adsorption and recovery device 11
2 and only the solvent vapor is removed by the adsorbent, and discharged out of the system as a purification gas.
【００１６】ロータを連続回転させることにより、溶剤
を吸着した吸着剤は吸着溶剤脱着ゾーン１３へ送られ、
脱着用不活性ガス加熱器１４にて高温に加熱された脱着
用不活性ガスで溶剤が脱着されて再生され、再び、溶剤
吸着ゾーン１２に送られるという動作が連続的に繰り返
される。By continuously rotating the rotor, the adsorbent that has adsorbed the solvent is sent to the adsorption solvent desorption zone 13 and
The operation of desorbing and regenerating the solvent with the desorption inert gas heated to a high temperature in the desorption inert gas heater 14 is regenerated, and the operation of sending the solvent to the solvent adsorption zone 12 is continuously repeated.
【００１７】脱着溶剤を含有した高温の脱着用不活性ガ
スは乾燥用循環ガス加熱器１０入口の低温の循環不活性
ガスに戻され、この循環不活性ガスを加熱する。The high-temperature desorption inert gas containing the desorption solvent is returned to the low-temperature circulating inert gas at the inlet of the drying circulating gas heater 10 to heat the circulating inert gas.
【００１８】加熱された循環不活性ガスは、最終的に乾
燥用循環ガス加熱器１０にて高温に加熱された後、再び
加熱ガス吹出口６より乾燥用高温ガスとして吹き出され
る。The heated circulating inert gas is finally heated to a high temperature by the circulating gas heater for drying 10 and then blown out again as a high-temperature gas for drying from the heated gas outlet 6.
【００１９】[0019]
【発明の効果】本発明によれば、ドライヤ内の酸素濃度
上昇を防ぐために実施するブロー排気中の溶剤を吸着回
収により数ｐｐｍ以下まで浄化できる。According to the present invention, it is possible to purify the solvent in the blown exhaust gas, which is carried out to prevent the oxygen concentration in the dryer from rising, to several ppm or less by adsorption and recovery.
【００２０】また、吸着溶剤の脱着用ガスとして補給用
不活性ガスを高温にしたものを利用することができ、し
かもその熱を循環不活性ガスの加熱に利用できるため、
運転費の増加が極めて小さくなる。Further, as a gas for desorbing the adsorption solvent, a gas obtained by raising the temperature of the replenishment inert gas can be used, and the heat can be used for heating the circulating inert gas.
The increase in operating costs is extremely small.
【図１】本発明による溶剤回収方法を実施した粘着剤乾
燥設備の系統図である。FIG. 1 is a system diagram of an adhesive drying facility in which a solvent recovery method according to the present invention is performed.
【図２】従来の溶剤回収方法を例示した粘着剤乾燥設備
の系統図である。FIG. 2 is a system diagram of an adhesive drying equipment illustrating a conventional solvent recovery method.
５ ドライヤ ８ 溶剤凝縮用冷却器 ９ ガス循環ブロア １０ 乾燥用循環ガス加熱器 １１ ロータ式溶剤吸着回収装置 １４ 脱着用不活性ガス加熱器 5 Dryer 8 Solvent Condensing Cooler 9 Gas Circulation Blower 10 Circulating Gas Heater for Drying 11 Rotor Type Solvent Adsorption and Recovery Device 14 Desorption Inert Gas Heater
───────────────────────────────────────────────────── フロントページの続き (72)発明者 滝本 新一 兵庫県神戸市兵庫区和田崎町一丁目１番 １号 三菱重工業株式会社 神戸造船所 内 (56)参考文献 特開 昭52−69869（ＪＰ，Ａ) 特開 平３−77621（ＪＰ，Ａ) 特開 昭63−236514（ＪＰ，Ａ) 特表 昭62−502671（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/44 B01D 53/06 B01D 53/74 B01D 53/81 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shinichi Takimoto 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture Inside Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (56) References JP, A) JP-A-3-77621 (JP, A) JP-A-63-236514 (JP, A) JP-T-62-502671 (JP, A) (58) Fields investigated (Int. Cl. 7 , (DB name) B01D 53/44 B01D 53/06 B01D 53/74 B01D 53/81
Claims (1)
性ガスを冷却して溶剤を凝縮回収し、凝縮回収後の循環
不活性ガスの一部を循環系外へブロー排気すると共にブ
ロー排気と同量の不活性ガスを系内に補給し、補給され
た循環不活性ガスを加熱して前記ドライヤへ導入してな
る溶剤回収方法において、前記ブロー排気はその中の溶
剤を吸着回収してから排出させ、補給用の不活性ガスを
加熱して吸着溶剤の脱着用ガスにし、脱着された溶剤を
その脱着用ガスと共に系内に導入するようにした溶剤回
収方法。A circulating inert gas containing a solvent sucked from a dryer is cooled to condense and recover the solvent, and a part of the circulating inert gas after the condensing and recovering is blown out of the circulation system and is blown out. In a solvent recovery method comprising supplying an amount of inert gas into the system, heating the supplied circulating inert gas, and introducing the gas into the dryer, the blow exhaust discharges the solvent contained therein by absorbing and recovering it. And heating the replenishing inert gas to a gas for desorption of the adsorption solvent, and introducing the desorbed solvent into the system together with the desorption gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3142614A JP3021092B2 (en) | 1991-05-20 | 1991-05-20 | Solvent recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3142614A JP3021092B2 (en) | 1991-05-20 | 1991-05-20 | Solvent recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04341319A JPH04341319A (en) | 1992-11-27 |
| JP3021092B2 true JP3021092B2 (en) | 2000-03-15 |
Family
ID=15319428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3142614A Expired - Lifetime JP3021092B2 (en) | 1991-05-20 | 1991-05-20 | Solvent recovery method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3021092B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4548891B2 (en) * | 2000-02-29 | 2010-09-22 | 東邦化工建設株式会社 | Organic solvent recovery method |
| JP5243900B2 (en) * | 2008-09-19 | 2013-07-24 | 株式会社大気社 | Solvent recovery equipment |
| JP5576723B2 (en) * | 2010-06-24 | 2014-08-20 | パナソニック株式会社 | Solvent recovery device |
| JP6458465B2 (en) * | 2014-11-28 | 2019-01-30 | 東洋紡株式会社 | Organic solvent recovery system |
-
1991
- 1991-05-20 JP JP3142614A patent/JP3021092B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04341319A (en) | 1992-11-27 |
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