JPH0634897B2 - Adsorption and desorption method with activated carbon - Google Patents
Adsorption and desorption method with activated carbonInfo
- Publication number
- JPH0634897B2 JPH0634897B2 JP61161924A JP16192486A JPH0634897B2 JP H0634897 B2 JPH0634897 B2 JP H0634897B2 JP 61161924 A JP61161924 A JP 61161924A JP 16192486 A JP16192486 A JP 16192486A JP H0634897 B2 JPH0634897 B2 JP H0634897B2
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- JP
- Japan
- Prior art keywords
- adsorption
- desorption
- activated carbon
- air
- solvent
- 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.)
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- Separation Of Gases By Adsorption (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、活性炭を用いた溶剤の吸脱着方法において、
吸着・脱着工程の切り替え時、排気側に吸脱着缶内の脱
着残存蒸気を排出させない方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a solvent adsorption / desorption method using activated carbon,
The present invention relates to a method in which the desorption residual vapor in the adsorption / desorption can is not discharged to the exhaust side when the adsorption / desorption process is switched.
従来、活性炭を用いた溶剤の吸脱着方法は広く知られて
おり、実用に供されている。この吸脱着方法は吸着缶に
収納された活性炭に吸着した有機溶剤類を、活性炭より
脱着するのに、活性炭に水蒸気を直接作用させて脱着し
溶剤の回収と活性炭の再生を行っている。Conventionally, a method of adsorbing and desorbing a solvent using activated carbon has been widely known and put to practical use. According to this adsorption / desorption method, in order to desorb organic solvents adsorbed on the activated carbon stored in an adsorption can from the activated carbon, steam is directly applied to the activated carbon to desorb the solvent and recover the solvent and regenerate the activated carbon.
すなわち、活性炭を収納した吸着缶で吸脱着を行う場
合、吸着缶が単数、複数に拘わらず、溶剤を活性炭に吸
着する吸着工程と、吸着された溶剤を脱着する脱着工程
より成り立っている。吸着工程では、溶剤が活性炭に有
効に吸着された頃合いを見計らって吸着完了とし、次工
程すなわち脱着工程に進める。脱着工程では、前述のよ
うに水蒸気を吸着缶内に吹き込むため、脱着完了時点で
は吸着缶内に缶容積分の水蒸気が残存している。脱着工
程が完了すると、その缶は再び吸着工程に戻る。その切
替え直後に吸着缶内に残存していた水蒸気が排気側に噴
出し、白煙となるため環境上、視覚上問題となる。脱着
工程の後に乾燥工程を持つ吸脱着装置でも同じ問題があ
る。That is, when adsorbing and desorbing with an adsorption can containing activated carbon, it is composed of an adsorption step of adsorbing a solvent on the activated carbon and a desorption step of desorbing the adsorbed solvent, regardless of the number of adsorption cans. In the adsorption step, the adsorption is completed by observing the time when the solvent is effectively adsorbed by the activated carbon, and the next step, that is, the desorption step is performed. In the desorption process, since water vapor is blown into the adsorption can as described above, when the desorption is completed, the amount of water vapor remains in the adsorption can. When the desorption process is complete, the can returns to the adsorption process again. Immediately after the switching, the water vapor remaining in the adsorption canister spouts to the exhaust side and becomes white smoke, which causes environmental and visual problems. An adsorption / desorption device having a drying process after the desorption process has the same problem.
このような従来の工程をフローシートで示すと第 1の通
りである。The flow sheet of the conventional process is as follows.
従来、この水蒸気白煙を消すために、排気口に種々の器
具、装置を取付けることが試みられた。例えば、デミス
ターのように衝突により水蒸気の粒子を大きくして取る
方法、冷却、凝縮して水蒸気量を減らす方法、或いは加
熱して水蒸気をガス化し透明にしようとする方法等がそ
れである。Conventionally, in order to extinguish the steam white smoke, it has been attempted to attach various instruments and devices to the exhaust port. For example, a method of enlarging water vapor particles by collision like a demister, a method of cooling and condensing to reduce the amount of water vapor, a method of heating to vaporize the water vapor to make it transparent, and the like.
しかし、どの方法も充分な成果をあけることができなか
った。However, none of the methods have been successful.
本発明の目的は、活性炭を用いた溶剤の吸脱着方法にお
いて、水蒸気、脱着後の吸脱着缶内に残留した水蒸気お
あよび微量の残留溶剤を系外に排出しない方法を提供す
ることにある。It is an object of the present invention to provide a method for adsorbing and desorbing a solvent using activated carbon, which does not discharge water vapor and a small amount of residual solvent remaining in the adsorption and desorption can after desorption to the outside of the system. .
本発明は、活性炭を用いた吸脱着方法において、水蒸気
により脱着した後の活性炭を収納した吸脱着缶内に常温
空気を圧入し、該缶内に残存した脱着水蒸気と圧入空気
とをコンデンサー側に押出して水蒸気を凝縮させ非凝縮
ガスを吸着工程に供することを特徴する活性炭による吸
脱着方法である。The present invention, in the adsorption-desorption method using activated carbon, room temperature air is press-fitted into the adsorption-desorption can containing the activated carbon after desorption with steam, and the desorbed steam and the press-fitted air remaining in the can are transferred to the condenser side. It is a method of adsorption and desorption using activated carbon, which comprises extruding and condensing water vapor and subjecting a non-condensed gas to an adsorption step.
このような本発明の工程をフローシートにて示すと、第
2図の通りである。A flow sheet showing the steps of the present invention is as follows.
It is as shown in Figure 2.
本発明によると、脱着後の缶内に残存した水蒸気が系外
に排出されないため、環境対策上有効であると共に、熱
回収の点及び活性炭の冷却による吸着効果の点から有効
である。According to the present invention, the water vapor remaining in the can after desorption is not discharged to the outside of the system, which is effective in terms of environmental measures, and in terms of heat recovery and adsorption effect by cooling activated carbon.
本発明において用いる活性炭は、通常溶剤回収等に広く
用いられている粒状炭、粉状炭、繊維状炭等いずれでも
よい。The activated carbon used in the present invention may be any of granular charcoal, powdered charcoal, fibrous charcoal, etc. which are widely used for solvent recovery and the like.
これらの活性炭を収納した吸着缶は、単缶形式でも、複
数の缶が並列的に配列され交互に吸着と脱着とを繰返し
行う形式でも、いずれでもよい。The adsorption can containing these activated carbons may be either a single can type or a type in which a plurality of cans are arranged in parallel and alternately perform adsorption and desorption alternately.
本発明を装置を例示して具体的に説明する。The present invention will be specifically described by exemplifying an apparatus.
第 3図は吸脱着缶を 2缶並列的に配列し交互に吸着と脱
着を行う形式の装置を示したものである。Figure 3 shows a device of the type in which two adsorption and desorption cans are arranged in parallel and alternately perform adsorption and desorption.
今、この図で吸着缶 5は吸着中であることを示してい
る。被処理ガスはエアフィルター 1で塵を取り除かれ原
ガスブロアー 2によって吸着缶 5に送られている。吸着
缶内には活性炭15が充填されており、その層を通過する
際に溶剤類は活性炭に吸着され、清浄空気となって排気
7を通り排出される。Now, this figure shows that the adsorption can 5 is adsorbing. The gas to be treated has its dust removed by the air filter 1 and is sent to the adsorption can 5 by the raw gas blower 2. The adsorption can is filled with activated carbon 15, and when passing through that layer, the solvents are adsorbed by the activated carbon and become clean air and exhausted.
Discharged through 7.
吸着缶 5、 6の吸着工程・脱着工程の切換えを司さどる
のは切替弁 3、 4と排気弁 7、 8である。The switching valves 3 and 4 and the exhaust valves 7 and 8 control the switching between the adsorption process and the desorption process of the adsorption cans 5 and 6.
吸着中の吸着缶に付帯する弁 3、 7は当然のことながら
被処理ガスが通過する側に開かれている。As a matter of course, the valves 3 and 7 attached to the adsorption can during adsorption are open on the side through which the gas to be treated passes.
一方、吸着缶 6は脱着工程であることを示している。On the other hand, the adsorption can 6 is shown to be a desorption process.
吸着缶 6に付帯する切替弁 4は、被処理ガス側からの流
れを閉止せしめ、コンデンサー側への流路を開けてい
る。勿論、排気側との流路を閉じるため、排気弁 8は閉
じられている。The switching valve 4 attached to the adsorption can 6 closes the flow from the gas to be treated side and opens the flow path to the condenser side. Of course, the exhaust valve 8 is closed to close the flow path to the exhaust side.
この状態で自動弁11を開け脱着用の水蒸気を吹きこむ。
活性炭16に吸着した溶剤は吹き込まれた水蒸気により活
性炭から脱離され、水蒸気と溶剤の混合蒸気となりコン
デンサーに送られる。コンデンサー内でこの混合蒸気は
凝縮され回収液として回収される。In this state, the automatic valve 11 is opened and the steam for desorption is blown in.
The solvent adsorbed on the activated carbon 16 is desorbed from the activated carbon by the injected steam, becomes a mixed vapor of the steam and the solvent, and is sent to the condenser. This mixed vapor is condensed in the condenser and recovered as a recovery liquid.
コンデンサーで凝縮しきれなかったガスは、空気抜きラ
イン14を通り吸着側の缶に戻り活性炭15に吸着される。
活性炭16に吸着された溶剤が、ほぼ完全に脱離された状
態で脱着工程は終り自動弁11は閉じる。10、11は蒸気側
自動弁、12、13は空気側自動弁をそれぞれ示す。The gas that cannot be completely condensed in the condenser returns to the adsorption side can through the air vent line 14 and is adsorbed by the activated carbon 15.
The desorption process ends and the automatic valve 11 closes when the solvent adsorbed on the activated carbon 16 is almost completely desorbed. 10 and 11 are steam side automatic valves, and 12 and 13 are air side automatic valves.
脱着工程に要する時間は活性炭素繊維を充填した吸着装
置において 4〜 6分である。The time required for the desorption process is 4 to 6 minutes in the adsorption device filled with activated carbon fiber.
弁 4、 8はそのままの状態で自動弁13を開ける。自動弁
13からは空気が圧入され、吸着缶 6に残存している水蒸
気をコンデンサー 9に押し出す。コンデンサー内で水蒸
気は凝縮され空気は空気抜きライン14を経て吸着側に戻
り処理される。Open the automatic valve 13 while leaving the valves 4 and 8 as they are. Automatic valve
Air is pressed in from 13, and the water vapor remaining in the adsorption can 6 is pushed out to the condenser 9. The water vapor is condensed in the condenser, and the air is returned to the adsorption side through the air vent line 14 and processed.
この操作を 1〜 2分間続けることにより吸着缶 5内の残
存蒸気は一掃され缶内は空気に置換される。この状態で
吸着缶 6内の活性炭16は再生完了となり、いつでも吸着
可能な状態となる。吸着中の吸着缶 5が目的とする溶剤
量を吸着した時点で吸着工程は再生済の缶、すなわち吸
着缶 6に切換わる。吸着缶 6は前述のように脱着工程と
なり再生される。このように吸着・脱着・置換工程を交
互に繰り返し連続運転をする。By continuing this operation for 1 to 2 minutes, the residual vapor in the adsorption can 5 is swept away and the inside of the can is replaced with air. In this state, the activated carbon 16 in the adsorption can 6 is completely regenerated, and is ready for adsorption. When the adsorbing can 5 during adsorption has adsorbed the target amount of solvent, the adsorbing process is switched to the regenerated can, that is, the adsorbing can 6. The adsorption can 6 is regenerated by the desorption process as described above. In this way, the adsorption / desorption / substitution process is alternately repeated to perform continuous operation.
本発明の効果を列挙すると次の通りである。 The effects of the present invention are listed below.
吸着・脱着の切り替え時に系外に排気されるガスの最
高温度を圧入空気量調整によって60℃以下にすることが
できる。また、排気温度における最高相対湿度を70以下
とすることができるため、排気筒からの白煙の発生をな
くすことが可能である。The maximum temperature of the gas exhausted outside the system at the time of switching between adsorption and desorption can be set to 60 ° C or less by adjusting the amount of press-fit air. Further, since the maximum relative humidity at the exhaust temperature can be 70 or less, it is possible to eliminate the generation of white smoke from the exhaust stack.
吸着開始時の活性炭の温度を60℃以下とすることがで
きるため、活性炭の吸着効率を高めることが可能であ
る。Since the temperature of activated carbon at the start of adsorption can be set to 60 ° C. or lower, the adsorption efficiency of activated carbon can be increased.
脱着完了後、吸着缶に圧入された空気は、残存水蒸気
と共にコンデンサーに入り、水蒸気は凝縮して溶剤回収
系に、空気は吸着系にそれぞれ送られる、いわゆる閉鎖
系のガス流であるため、系外に残留溶媒が排出されず環
境対策上有効である。After completion of desorption, the air press-fitted into the adsorption can enters the condenser together with the residual water vapor, the water vapor is condensed and sent to the solvent recovery system, and the air is sent to the adsorption system. The residual solvent is not discharged to the outside, which is effective for environmental measures.
実施例 第 3図に示した系統の溶剤回収装置を利用し、 1.1.1-
トリクロロエタンの回収サイクルを実施した。Example Using the solvent recovery system of the system shown in Fig. 3, 1.1.1-
A recovery cycle of trichloroethane was performed.
装置において、吸着缶の気積は約 1.4ｍ３、 1.1.1- ト
リクロロエタン濃度は10,000ppm 、給気量は10m３／min
である。In the equipment, the gas volume of the adsorption can is about 1.4m 3 , the concentration of 1.1.1-trichloroethane is 10,000ppm, and the supply rate is 10m 3 / min.
Is.
この吸着缶に 1.1.1- トリクロロエタン含有ガスを10分
間給気し水蒸気脱着を 6分、空気置換を 3分のサイクル
にてＡ缶とＢ缶とを交互に切換えて吸脱着を繰り返し
た。A gas containing 1.1.1-trichloroethane was supplied to the adsorption can for 10 minutes, steam desorption was repeated for 6 minutes, and air replacement was repeated for 3 minutes by alternately switching between can A and can B.
その結果、吸着系に切り替えたときの排気温度は最高値
で55℃であり、相対湿度は最高値で56％であった。As a result, the maximum exhaust temperature when switching to the adsorption system was 55 ° C and the maximum relative humidity was 56%.
比較例 空気置換を行わず直接吸着系に切り替えたときの排気温
度は、最高値で80℃、湿度は過飽和であり、排気筒から
約30秒間白煙の発生が認められた。Comparative Example When the direct adsorption system was switched to without performing air replacement, the maximum exhaust temperature was 80 ° C, the humidity was supersaturated, and white smoke was observed from the exhaust stack for about 30 seconds.
第 1図は従来法における吸脱着のフローシート、第 2図
は本発明法における吸脱着のフローシート、第 3図は本
発明法の系における具体例の詳細なフローシートを示し
たものである。 1：エアフィルター、 2：原ガスブロアー 3、 4：切替弁、 5：吸着缶Ａ、 6：吸着缶Ｂ 7、 8：排気弁、 9：コンデンサー 10、11：蒸気側自動弁、12，13：空気側自動弁 14：ライン、15、16：活性炭Fig. 1 shows the adsorption / desorption flow sheet in the conventional method, Fig. 2 shows the adsorption / desorption flow sheet in the method of the present invention, and Fig. 3 shows the detailed flow sheet of a specific example in the system of the present invention. . 1: Air filter, 2: Raw gas blower 3, 4: Switching valve, 5: Adsorption canister A, 6: Adsorption canister B 7, 8: Exhaust valve, 9: Condenser 10, 11: Steam side automatic valve, 12, 13 : Air side automatic valve 14: Line, 15, 16: Activated carbon
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−115724（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-115724 (JP, A)
Claims (1)
気により脱着した後の活性炭を収納した吸脱着缶内に常
温空気を圧入し、該缶内に残存した脱着水蒸気と圧入空
気とをコンデンサー側に押出して水蒸気を凝縮させ非凝
縮ガスを吸着工程に供することを特徴とする活性炭によ
る吸脱着方法。1. In an adsorption / desorption method using activated carbon, room temperature air is press-fitted into an adsorption / desorption can containing the activated carbon desorbed by steam, and the desorbed steam remaining in the can and the press-fitted air are fed to the condenser side. A method for adsorption / desorption by activated carbon, which comprises extruding into a column to condense water vapor and subjecting a non-condensed gas to an adsorption step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61161924A JPH0634897B2 (en) | 1986-07-11 | 1986-07-11 | Adsorption and desorption method with activated carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61161924A JPH0634897B2 (en) | 1986-07-11 | 1986-07-11 | Adsorption and desorption method with activated carbon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6320020A JPS6320020A (en) | 1988-01-27 |
| JPH0634897B2 true JPH0634897B2 (en) | 1994-05-11 |
Family
ID=15744619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61161924A Expired - Lifetime JPH0634897B2 (en) | 1986-07-11 | 1986-07-11 | Adsorption and desorption method with activated carbon |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634897B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757699A (en) * | 2021-09-30 | 2021-12-07 | 深圳市环境工程科学技术中心有限公司 | Activated carbon adsorption method and device |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE466292B (en) * | 1989-10-12 | 1992-01-27 | Jan Andersson | PROCEDURE AND DEVICE TO SEPARATE ONE OR MORE SUBSTANCES FROM GASES |
| JP4524519B2 (en) * | 2000-10-16 | 2010-08-18 | 東洋紡績株式会社 | Gas processing equipment |
| KR100473646B1 (en) * | 2002-02-19 | 2005-03-08 | 주식회사 호원 | An apparatus for combustion with adsorption and concentration of volatile organic compound gas |
| US8142555B2 (en) | 2004-08-19 | 2012-03-27 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Method of treating volatile organic compound and system for treating volatile organic compound using gas turbine |
| JP3956993B1 (en) | 2006-01-30 | 2007-08-08 | 石川島播磨重工業株式会社 | Volatile organic compound processing method and volatile organic compound processing system using gas turbine |
| JP3948486B1 (en) | 2006-07-10 | 2007-07-25 | 石川島播磨重工業株式会社 | Method for treating volatile organic compound, adsorption / desorption device, and system for treating volatile organic compound |
| JP5835662B2 (en) * | 2011-10-18 | 2015-12-24 | 株式会社栗本鐵工所 | Control method of volatile organic compound processing apparatus |
| JP5933467B2 (en) * | 2013-02-19 | 2016-06-08 | 大陽日酸株式会社 | Gas processing equipment |
| CN109985482B (en) * | 2019-04-28 | 2023-11-17 | 上海一飒环保工程科技有限公司 | Volatile organic compound adsorption and in-situ desorption regeneration equipment and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322541A (en) * | 1977-07-08 | 1978-03-02 | Toyobo Co Ltd | Adhesive tapes having tear properties in transverse direction |
| JPS55116421A (en) * | 1979-03-02 | 1980-09-08 | Nittetsu Kakoki Kk | Solvent reclaiming system |
-
1986
- 1986-07-11 JP JP61161924A patent/JPH0634897B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757699A (en) * | 2021-09-30 | 2021-12-07 | 深圳市环境工程科学技术中心有限公司 | Activated carbon adsorption method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6320020A (en) | 1988-01-27 |
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