JPH04341319A - Method for solvent recovery - Google Patents
Method for solvent recoveryInfo
- Publication number
- JPH04341319A JPH04341319A JP3142614A JP14261491A JPH04341319A JP H04341319 A JPH04341319 A JP H04341319A JP 3142614 A JP3142614 A JP 3142614A JP 14261491 A JP14261491 A JP 14261491A JP H04341319 A JPH04341319 A JP H04341319A
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- gas
- inert gas
- adsorption
- 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.)
- Granted
Links
- 239000002904 solvent Substances 0.000 title claims abstract description 89
- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 10
- 238000003795 desorption Methods 0.000 claims abstract description 21
- 239000011261 inert gas Substances 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 36
- 238000007664 blowing Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 20
- 239000003463 adsorbent Substances 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 239000013557 residual solvent Substances 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 13
- 230000001070 adhesive effect Effects 0.000 description 13
- 238000001035 drying Methods 0.000 description 11
- 239000002390 adhesive tape Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
Abstract
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 solvent recovery method suitable for use in drying equipment for solvent-containing adhesives.
【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 device using a closed system that circulates an inert gas such as nitrogen gas. This example shows an example in which a solvent recovery device is applied to adhesive drying equipment for tape. In the figure, 1 is an adhesive tape, 2 is a tape support roll, 3 is an adhesive-containing solvent, and 4 is an adhesive coating. Showing roll. A dryer 5 is provided downstream of the adhesive application roll 4, and a heated gas outlet 6 and a solvent-containing gas inlet 7 are arranged therein. The solvent-containing gas inlet 7 is connected to the heated gas outlet 6 via a solvent condensing cooler 8, a gas circulation blower 9, and a drying circulation gas heater 10 to form a closed circulation system for circulating inert gas. are doing. Further, on the outlet side of the gas circulation blower, a system for blowing out part of the circulating inert gas and a system for introducing replenishing 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 structure, 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. Inside the dryer 5, high-temperature inert gas is blown from the heated gas outlet 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 the circulating inert gas from the solvent-containing gas inlet 7 and cooled by the solvent condensing cooler 8, whereby the solvent vapor is condensed and liquefied, and the recovered solvent is 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。[0005] From the outlet of the solvent condensing cooler 8, an inert gas containing only the solvent equivalent to the saturated vapor pressure at the cooled temperature is discharged, and is passed through a gas circulation blower 9 to a drying circulation gas heater. After being heated by 10, it is again blown as a drying hot gas 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
。Note that if the oxygen concentration in the dryer 5 increases due to contamination with the outside air, there is a risk of explosion due to the solvent. The same amount of replenishing inert gas as the blow exhaust gas is introduced into the inlet of the heater 10.
【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。[Problems to be Solved by the Invention] As described above, in order to prevent an increase in the oxygen concentration in the dryer 5 and to prevent fires and explosions caused by the solvent, a part of the circulating inert gas is exhausted to the outside of the system. Continuous supply of fresh inert gas is required.
【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, the blow exhaust gas contains a highly concentrated solvent ranging from several thousand ppm to several percent, resulting in problems 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 it is an object of the present invention to provide a solvent recovery method that increases the recovery efficiency of high-concentration solvents in blow exhaust gas and prevents 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。[Means for Solving the Problems] According to the present invention, the solvent-containing circulating inert gas sucked from the dryer is cooled, the solvent is condensed and recovered, and the circulating inert gas after the condensed recovery is recovered. In the solvent recovery method, a part of the circulating inert gas is blown out to the outside of the circulation system, and the same amount of inert gas as the blown exhaust gas is replenished into the system, and the supplied circulating inert gas is heated and introduced into the dryer, The blow exhaust adsorbs and collects the solvent therein and then discharges it, heats the inert gas for replenishment and uses it as a gas for desorption of the adsorbed solvent, and introduces the desorbed solvent into the system together with the desorption gas. A solvent recovery method 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。[Operation] According to the above means, the solvent remaining in the blow exhaust of circulating inert gas after condensation and recovery of the solvent is adsorbed on the adsorbent at a low temperature with high adsorption capacity, and the concentration of solvent vapor is sufficiently reduced. , only purified gas is exhausted. The adsorbed solvent is desorbed using high-temperature gas obtained by heating the supplementary inert gas, and the solvent-containing high-temperature inert gas after desorption of the adsorbed solvent is directly introduced into the 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。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates the solvent recovery method according to the present invention, in which the same elements as those shown in FIG. 2 are designated by the same reference numerals. In the present invention, the solvent adsorption zone 12 and adsorption solvent desorption zone 13 of the rotor type solvent adsorption and recovery device 11 are connected to the blow exhaust system and the replenishing inert gas system so that the solvent adsorption zone 12 and adsorption solvent desorption zone 13 are located respectively, and the outlet of the solvent adsorption zone 12 is connected to the blow exhaust system and the replenishing inert gas system. 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. Replenishment 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 adhesive tape 1 coated with the adhesive-containing solvent 3 by the adhesive coating roll 4 is transferred to the tape support roll 2.
The heated gas is supported by the heating gas outlet 6 and sent into the dryer 5.
The solvent is evaporated and dried by the high-temperature inert gas sprayed, leaving only the adhesive remaining 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 the solvent-containing gas inlet 7 and cooled by the solvent condensing cooler 8, whereby the solvent vapor is condensed and liquefied and recovered. Collected as a 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。[0015] From the outlet of the solvent condensing cooler 8, an inert gas containing a solvent equivalent to the saturated vapor pressure at the cooled gas temperature is discharged, and a part of it is sent to the rotor from the outlet of the gas circulation blower 9. Solvent adsorption zone 1 of type solvent adsorption and recovery device 11
2, only the solvent vapor is removed by an adsorbent and discharged outside the system as purified 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,
The solvent is desorbed and regenerated by the desorption inert gas heated to a high temperature by the desorption inert gas heater 14, and the operation is continuously repeated, in which the solvent is sent to the solvent adsorption zone 12 again.
【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 in the drying circulating gas heater 10 and then blown out again from the heated gas outlet 6 as a drying hot gas.
【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, the solvent in the blow exhaust, which is carried out to prevent an increase in oxygen concentration in the dryer, can be purified 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。[0020] In addition, the replenishing inert gas heated to high temperature can be used as the gas for desorption of the adsorbing solvent, and the heat can be used to heat the circulating inert gas.
The increase in operating costs will be 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 adhesive drying equipment that implements the solvent recovery method according to the present invention.
【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 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 Cooler for solvent condensation 9 Gas circulation blower 10 Circulating gas heater for drying 11 Rotor type solvent adsorption and recovery device 14 Inert gas heater for desorption
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。Claim 1: Cooling the solvent-containing circulating inert gas taken in from the dryer, condensing and recovering the solvent, and blowing and exhausting a part of the circulating inert gas after condensing and recovering to the outside of the circulation system. In a solvent recovery method in which a certain amount of inert gas is replenished into the system, the supplied circulating inert gas is heated and introduced into the dryer, and the blow exhaust adsorbs and collects the solvent therein before being discharged. A method for recovering a solvent in which the replenishing inert gas is heated to become a gas for desorption of the adsorbed solvent, and the desorbed solvent is introduced into the system together with the gas for desorption.
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 true JPH04341319A (en) | 1992-11-27 |
| JP3021092B2 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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001239127A (en) * | 2000-02-29 | 2001-09-04 | Toho Kako Kensetsu Kk | Method for recovering organic solvent |
| JP2010069435A (en) * | 2008-09-19 | 2010-04-02 | Taikisha Ltd | Solvent recovering facility |
| JP2012005956A (en) * | 2010-06-24 | 2012-01-12 | Panasonic Corp | Solvent recovery apparatus |
| JP2016101553A (en) * | 2014-11-28 | 2016-06-02 | 東洋紡株式会社 | Organic solvent recovery system |
-
1991
- 1991-05-20 JP JP3142614A patent/JP3021092B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001239127A (en) * | 2000-02-29 | 2001-09-04 | Toho Kako Kensetsu Kk | Method for recovering organic solvent |
| JP2010069435A (en) * | 2008-09-19 | 2010-04-02 | Taikisha Ltd | Solvent recovering facility |
| JP2012005956A (en) * | 2010-06-24 | 2012-01-12 | Panasonic Corp | Solvent recovery apparatus |
| JP2016101553A (en) * | 2014-11-28 | 2016-06-02 | 東洋紡株式会社 | Organic solvent recovery system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3021092B2 (en) | 2000-03-15 |
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