JP6565357B2 - Concentrator and organic solvent recovery system - Google Patents
Concentrator and organic solvent recovery system Download PDFInfo
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- JP6565357B2 JP6565357B2 JP2015120161A JP2015120161A JP6565357B2 JP 6565357 B2 JP6565357 B2 JP 6565357B2 JP 2015120161 A JP2015120161 A JP 2015120161A JP 2015120161 A JP2015120161 A JP 2015120161A JP 6565357 B2 JP6565357 B2 JP 6565357B2
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- 239000003960 organic solvent Substances 0.000 title claims description 83
- 238000011084 recovery Methods 0.000 title claims description 53
- 239000007789 gas Substances 0.000 claims description 105
- 238000003795 desorption Methods 0.000 claims description 51
- 238000001816 cooling Methods 0.000 claims description 36
- 238000001179 sorption measurement Methods 0.000 claims description 36
- 238000010926 purge Methods 0.000 claims description 13
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical group CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 6
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 claims description 6
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims 1
- 239000003546 flue gas Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000003463 adsorbent Substances 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 6
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Description
本発明は、有機溶剤を含有する排ガスから有機溶剤を濃縮および回収する有機溶剤回収システムに関し、特に、各種工場や研究施設等（以下、生産設備と総称する）から排出される有機溶剤を含有する産業排ガスから有機溶剤を効率的に濃縮する装置および有機溶剤回収システムに関する。 The present invention relates to an organic solvent recovery system for concentrating and recovering an organic solvent from exhaust gas containing an organic solvent, and particularly includes an organic solvent discharged from various factories and research facilities (hereinafter collectively referred to as production equipment). The present invention relates to an apparatus for efficiently concentrating an organic solvent from industrial exhaust gas and an organic solvent recovery system.
有機溶剤を含有する排ガスから有機溶剤を回収する処理システムとして、吸着材を含有した吸着素子を利用したものが知られている。この吸着素子を利用した処理システムとしては、排ガスを吸着材に接触させて有機溶剤を吸着させ、これに高温のガスを吹き付けて有機溶剤を脱着させて高濃度の有機溶剤を含有する脱着ガスとして回収する濃縮装置が知られている（例えば、特許文献１および２）。 As a processing system for recovering an organic solvent from an exhaust gas containing an organic solvent, a system using an adsorbing element containing an adsorbent is known. As a treatment system using this adsorbing element, an exhaust gas is brought into contact with an adsorbent to adsorb an organic solvent, and a high-temperature gas is blown onto the adsorbent to desorb the organic solvent to obtain a desorption gas containing a high concentration organic solvent. A concentrating device for recovery is known (for example, Patent Documents 1 and 2).
上記特許文献１および２においては、排ガス中の有機溶剤を濃縮し冷却凝縮にて回収する際に、脱着ガス中の一部の有機溶剤が液化凝縮して吸着材に付着し、吸着工程における除去効率が低下する問題があった。 In the above Patent Documents 1 and 2, when the organic solvent in the exhaust gas is concentrated and recovered by cooling condensation, a part of the organic solvent in the desorption gas is liquefied and adhered to the adsorbent and removed in the adsorption step. There was a problem that efficiency decreased.
本発明は上記課題を背景になされたもので、排ガス中の有機溶剤を濃縮し冷却凝縮にて回収する際に、脱着ガス中の一部の有機溶剤が液化凝縮して吸着素子に付着するのを防ぐことで、吸着工程における除去効率の低下を抑制する濃縮装置および有機溶剤回収システムを提供することを課題とするものである。 The present invention has been made against the background of the above problems. When the organic solvent in the exhaust gas is concentrated and recovered by cooling condensation, a part of the organic solvent in the desorption gas is liquefied and condensed and adheres to the adsorption element. It is an object of the present invention to provide a concentrating device and an organic solvent recovery system that prevent a reduction in removal efficiency in the adsorption step by preventing the above.
本発明者らは、上記課題を解決するため、鋭意検討した結果、ついに本発明を完成するに到った。すなわち本発明は、以下の通りである。
（１）有機溶剤を含有する排ガスを接触させることで前記有機溶剤を吸着し、前記排ガスよりも高温のガスを接触させることで吸着した前記有機溶剤を脱着する吸着素子を含む濃縮装置であって、
濃縮装置が前記吸着素子に前記排ガスが導入されることによって前記有機溶剤を前記吸着素子に吸着させて清浄ガスを排出する吸着部と、前記吸着素子に前記高温のガスが導入されることによって前記有機溶剤を前記吸着素子から脱着させて前記有機溶剤を含有する脱着ガスを排出する脱着部とを有しており、
濃縮装置の前記脱着部が、濃縮装置の前記吸着部よりも下部に配置されることで、脱着時および脱着後の冷却凝縮液の吸着素子への付着を抑制することを特徴とする濃縮装置。
（２）濃縮装置の前記脱着部が、濃縮装置の前記吸着部よりも下部に配置され、濃縮装置に傾斜をつけることで、脱着時、脱着後の冷却凝縮液の吸着素子への付着を抑制する（１）に記載の濃縮装置。
（３）濃縮装置の前記脱着部における前記吸着素子の脱着処理が完了した部分が前記吸着部への移行の前に移行するパージ部を有し、前記吸着部から排出された前記清浄ガスの一部は前記パージ部に導入され、前記パージ部から排出されたパージ部出口ガスは、前記吸着部に導入される（１）または（２）記載の濃縮装置。
（４）（１）に記載の濃縮装置と、前記脱着ガスまたは前記排ガスを含むガスを冷却凝縮して前記有機溶剤を回収する冷却回収装置と、を備えた有機溶剤回収システム。
（５）濃縮装置の前記脱着部が、濃縮装置の前記吸着部よりも下部に配置され、前記冷却回収装置よりも上部に配置され、前記冷却回収装置の導入ラインの冷却凝縮液の吸着素子への付着を抑制する（４）に記載の有機溶剤回収システム。
（６）濃縮装置の前記脱着部が、濃縮装置の前記吸着部よりも下部に配置され、前記冷却回収装置よりも上部に配置され、前記冷却回収装置の導入ラインに傾斜を付けることで冷却回収装置の導入ラインの冷却凝縮液の吸着素子への付着を抑制する（４）に記載の有機溶剤回収システム。
（７）前記排ガスが５０℃〜２００℃である（４）〜（６）のいずれかに記載の有機溶剤回収システム。
（８）前記高温のガスが、前記排ガスである（４）〜（７）のいずれかに記載の有機溶剤回収システム。
（９）前記冷却回収装置へ前記排ガスおよび前記脱着ガスを通過させる割合は、前記排ガスが０％〜５０％であり、前記脱着ガスが５０％〜１００％である（４）〜（８）のいずれかに記載の有機溶剤回収システム。
（１０）前記排ガスは、生産設備から排出されるガスであり、前記清浄ガスの残部は、前記生産設備に戻される（４）〜（９）のいずれかに記載の有機溶剤回収システム。
（１１）前記有機溶剤が、ｎ−メチル−２−ピロリドン、Ｎ，Ｎ−ジメチルホルムアミド、Ｎ，Ｎ−ジメチルアセトアミド、またはｎ−デカンである（４）〜（１０）のいずれかに記載の有機溶剤回収システム。
As a result of intensive studies in order to solve the above problems, the present inventors have finally completed the present invention. That is, the present invention is as follows.
(1) A concentrating apparatus including an adsorbing element that adsorbs the organic solvent by contacting exhaust gas containing an organic solvent and desorbs the organic solvent adsorbed by contacting gas at a temperature higher than the exhaust gas. ,
A concentrating device introduces the exhaust gas into the adsorbing element, adsorbs the organic solvent to the adsorbing element, and discharges clean gas, and introduces the high-temperature gas into the adsorbing element. A desorption part for desorbing an organic solvent from the adsorption element and discharging a desorption gas containing the organic solvent,
The desorption part of a concentration apparatus is arrange | positioned below the said adsorption | suction part of a concentration apparatus, The adhesion to the adsorption | suction element of the cooling condensate at the time of desorption and after desorption is suppressed, The concentration apparatus characterized by the above-mentioned.
(2) The desorption part of the concentrating device is disposed below the adsorbing part of the concentrating device, and the concentrating device is inclined to suppress adhesion of the cooled condensate after adsorbing to the adsorbing element during desorption. The concentrating device according to (1).
(3) A part of the desorption unit of the concentrator where the desorption process of the adsorption element is completed has a purge unit that moves before the transfer to the adsorption unit, and one of the clean gases discharged from the adsorption unit The purge unit outlet gas discharged from the purge unit is introduced into the purge unit, and the purge unit outlet gas is introduced into the adsorption unit.
(4) An organic solvent recovery system comprising: the concentrating device according to (1); and a cooling recovery device that recovers the organic solvent by cooling and condensing the gas containing the desorption gas or the exhaust gas.
(5) The desorption portion of the concentrating device is disposed below the adsorbing portion of the concentrating device, and is disposed above the cooling recovery device, to the cooling condensate adsorbing element of the introduction line of the cooling recovery device (4) The organic solvent recovery system according to (4).
(6) The desorption part of the concentrating device is disposed below the adsorption unit of the concentrating device, is disposed above the cooling recovery device, and is cooled and recovered by inclining the introduction line of the cooling recovery device. The organic solvent recovery system according to (4), which suppresses adhesion of the cooled condensate to the adsorption element in the introduction line of the apparatus.
(7) The organic solvent recovery system according to any one of (4) to (6), wherein the exhaust gas is 50 ° C to 200 ° C.
(8) The organic solvent recovery system according to any one of (4) to (7), wherein the high-temperature gas is the exhaust gas.
(9) The ratio of allowing the exhaust gas and the desorption gas to pass through the cooling recovery apparatus is that the exhaust gas is 0% to 50% and the desorption gas is 50% to 100%. Organic solvent recovery system in any one.
(10) The organic solvent recovery system according to any one of (4) to (9), wherein the exhaust gas is a gas discharged from a production facility, and the remaining portion of the clean gas is returned to the production facility.
(11) The organic material according to any one of (4) to (10), wherein the organic solvent is n-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, or n-decane. Solvent recovery system.
本発明による濃縮装置および有機溶剤回収システムは、脱着ガス中の一部の有機溶剤が液化凝縮しても、除去効率を低下させることなく、低コストに有機溶剤を回収できる利点がある。 The concentrator and the organic solvent recovery system according to the present invention have an advantage that even when a part of the organic solvent in the desorption gas is liquefied and condensed, the organic solvent can be recovered at a low cost without reducing the removal efficiency.
以下、本発明について、図を参照して詳細に説明する。なお、以下に示す図の実施の形態においては、同一または対応する部分については、適宜省略し、その説明についても繰り返さないことにする。 Hereinafter, the present invention will be described in detail with reference to the drawings. In the embodiments shown in the drawings, the same or corresponding parts are omitted as appropriate, and the description thereof will not be repeated.
図１〜３は、本発明の実施の形態における濃縮装置の構成図の例である。 1-3 is an example of the block diagram of the concentration apparatus in embodiment of this invention.
濃縮装置２０は、脱着部２１と吸着部２２とを有している。吸着部２２では、有機溶剤を含有する排ガス（Ｇ１）が導入されることで、吸着素子に排ガス（Ｇ１）が接触することで、排ガス（Ｇ１）に含有される有機溶剤が吸着素子に吸着され、これにより排ガス（Ｇ１）が清浄化されて清浄ガス（Ｇ３）として排出される。 The concentrator 20 has a desorption part 21 and an adsorption part 22. In the adsorption unit 22, the exhaust gas (G1) containing the organic solvent is introduced, and the exhaust gas (G1) comes into contact with the adsorption element, so that the organic solvent contained in the exhaust gas (G1) is adsorbed by the adsorption element. As a result, the exhaust gas (G1) is cleaned and discharged as clean gas (G3).
脱着部２１では、吸着素子に排ガス（Ｇ１）よりも高温のガス（Ｇ４）が導入されることで、有機溶剤が吸着素子から脱着され、これにより有機溶剤を含有する脱着ガス（Ｇ５）として排出される。 In the desorption part 21, the organic solvent is desorbed from the adsorption element by introducing a gas (G4) having a temperature higher than that of the exhaust gas (G1) into the adsorption element, and is thereby discharged as a desorption gas (G5) containing the organic solvent. Is done.
吸着素子としては、活性アルミナ、シリカゲル、活性炭素材やゼオライトが広く利用でき、中でも活性炭と疎水性ゼオライトが特に好適に利用できる。活性炭と疎水性ゼオライトは、低濃度の有機化合物を吸着、脱着する機能に優れており、古くから吸着素子として各種の装置に利用されている。 As the adsorbing element, activated alumina, silica gel, activated carbon material and zeolite can be widely used, and activated carbon and hydrophobic zeolite can be particularly suitably used. Activated carbon and hydrophobic zeolite are excellent in the function of adsorbing and desorbing low-concentration organic compounds, and have been used for various devices as adsorbing elements for a long time.
また、本発明の実施形態における濃縮装置２０の具体的な構成は特に限定しないが、図３に示す通り、回転軸２３と、回転軸２３の周りに設けられた吸着素子としての筒状吸着体２４とを備え、回転軸２３周りに筒状吸着体２４を回転させることにより、吸着部２２において、有機溶剤含有ガス（Ｇ２）中の有機溶剤を吸着した吸着素子が連続的に脱着部２１に移動する構成が知られている。 In addition, the specific configuration of the concentrating device 20 in the embodiment of the present invention is not particularly limited, but as illustrated in FIG. 3, the rotating shaft 23 and a cylindrical adsorbent as an adsorbing element provided around the rotating shaft 23. 24, the adsorbing element that adsorbs the organic solvent in the organic solvent-containing gas (G2) in the adsorbing portion 22 is continuously attached to the desorbing portion 21 by rotating the cylindrical adsorbent 24 around the rotation shaft 23. A moving configuration is known.
本発明の実施形態における濃縮装置２０は、図１に示す通り、脱着部２１は吸着部２２よりも下部に配置されている。脱着ガス（Ｇ５）中に含まれる有機溶剤の一部が液化凝縮して冷却凝縮液が発生した場合においても、吸着部２２に冷却凝縮液が付着しにくくなるからである。冷却凝縮液は脱着部２１より下部へ落ち、脱着部２１の外装の内面などを伝って回収される。図２に示す通り、濃縮装置２０に傾斜をつけた方が好ましい。冷却凝縮液がより下へ落ち易くなるためである。 In the concentrator 20 according to the embodiment of the present invention, as shown in FIG. 1, the desorption part 21 is disposed below the adsorption part 22. This is because even when a part of the organic solvent contained in the desorption gas (G5) is liquefied and condensed to generate a cooling condensate, the cooling condensate hardly adheres to the adsorption portion 22. The cooled condensate falls below the desorption part 21 and is collected along the inner surface of the exterior of the desorption part 21. As shown in FIG. 2, it is preferable to incline the concentrator 20. This is because the cooling condensate easily falls down.
濃縮装置２０は、脱着部２１の脱着処理が完了した部分が吸着部２２への移行の前に移行するパージ部を有し、清浄ガス（Ｇ３）の一部がパージ部に導入され、パージ部から排出されたパージ部出口ガスは、吸着部２２に導入されるような構成であることも好ましい。清浄ガス（Ｇ３）で脱着完了した吸着素子をパージすることで、吸着素子に残る脱着ガス（Ｇ５）が清浄ガス（Ｇ３）へ含有することを防ぎ、吸着素子を冷却することが出来るからである。 The concentrating device 20 has a purge unit in which a portion where the desorption process of the desorption unit 21 has been completed is transferred before the transfer to the adsorption unit 22, and a part of the clean gas (G3) is introduced into the purge unit. It is also preferable that the purge portion outlet gas discharged from the gas is introduced into the adsorption portion 22. This is because purging the adsorption element that has been desorbed with the clean gas (G3) prevents the desorption gas (G5) remaining in the adsorption element from being contained in the clean gas (G3) and cools the adsorption element. .
濃縮装置２０の脱着に使用する高温のガス（Ｇ４）は、清浄ガス（Ｇ３）の一部を再生ヒータなどの加熱手段を用いて高温状態にしたものが好ましい。吸着部２２で有機溶剤含有ガスの処理風量が増えないからである。 The high-temperature gas (G4) used for desorption of the concentrator 20 is preferably one in which a part of the clean gas (G3) is brought to a high temperature state using a heating means such as a regenerative heater. This is because the processing air volume of the organic solvent-containing gas does not increase in the adsorption unit 22.
図４から６は、本発明の実施の形態における有機溶剤回収システムの構成図の例である。 4 to 6 are examples of configuration diagrams of the organic solvent recovery system in the embodiment of the present invention.
本発明の実施形態における有機溶剤回収システムは、濃縮装置２０と冷却回収装置１０で構成されている。冷却回収装置１０は、冷却凝縮装置１１と回収タンク１２で構成される。冷却凝縮装置１１は、冷却水、冷水等の冷却媒体を用いて、排ガス（Ｇ１）と脱着ガス（Ｇ５）中の有機溶剤を凝縮させることで、有機溶剤を高濃度に含有する回収液と有機溶剤を低濃度に含有する有機溶剤含有ガス（Ｇ２）とに分離する装置である。脱着ガス（Ｇ５）は配管Ｌ１を通過して冷却回収装置１０へ供給され、回収液と有機溶剤を低濃度に含有する有機溶剤含有ガス（Ｇ２）とに分離され、回収液は回収タンク１２に回収される。また、本発明の実施形態における有機溶剤回収システムにおいては、濃縮装置２０の吸着部２２へ、有機溶剤含有ガス（Ｇ２）が導入される構成となる。 The organic solvent recovery system in the embodiment of the present invention includes a concentrating device 20 and a cooling recovery device 10. The cooling recovery device 10 includes a cooling condensing device 11 and a recovery tank 12. The cooling condensing device 11 condenses the organic solvent in the exhaust gas (G1) and the desorption gas (G5) using a cooling medium such as cooling water or cold water, so that the recovered liquid containing the organic solvent at a high concentration and the organic This is an apparatus for separating the solvent into an organic solvent-containing gas (G2) containing a low concentration. The desorption gas (G5) passes through the pipe L1 and is supplied to the cooling and recovery apparatus 10, and is separated into a recovered liquid and an organic solvent-containing gas (G2) containing an organic solvent at a low concentration. Collected. Moreover, in the organic solvent collection | recovery system in embodiment of this invention, it becomes the structure by which organic solvent containing gas (G2) is introduce | transduced into the adsorption | suction part 22 of the concentration apparatus 20. FIG.
本発明の実施形態における有機溶剤回収システムは、図４に示す通り、前述した濃縮装置２０の脱着部２１で脱着ガス（Ｇ５）中の有機溶剤の一部が液化凝縮して冷却凝縮液が発生した場合、冷却凝縮装置１１に直接移行して回収タンク２２に回収液として回収される。図５に示す通り、冷却回収装置１０よりも脱着部２１が上部に配置される方が好ましい。冷却凝縮液が冷却回収装置１０へ移行しやすいからである。図６に示す通り、濃縮装置２０に傾斜をつけた方がより好ましい。より冷却凝縮液が冷却回収装置１０へ移行しやすいからである。 In the organic solvent recovery system according to the embodiment of the present invention, as shown in FIG. 4, a part of the organic solvent in the desorption gas (G5) is liquefied and condensed at the desorption unit 21 of the concentration device 20 described above to generate a cooled condensate. In this case, the cooling condenser 11 is directly transferred to the recovery tank 22 and recovered as a recovered liquid. As shown in FIG. 5, it is preferable that the detachable portion 21 is disposed at the upper portion than the cooling recovery device 10. This is because the cooling condensate easily moves to the cooling recovery device 10. As shown in FIG. 6, it is more preferable to incline the concentrator 20. This is because the cooling condensate is more easily transferred to the cooling recovery device 10.
本発明の実施形態における有機溶剤回収システムの濃縮装置２０の脱着に使用する高温のガス（Ｇ４）は、前述の通り清浄ガス（Ｇ３）の一部を再生ヒータなどの加熱手段を用いて高温状態にしたものが好ましいが、排ガス（Ｇ１）の温度が５０〜２００℃の温度の場合においては、排ガス（Ｇ１）の一部を再生ヒータなどで昇温させて使用した方がより好ましい。高温の排ガスを脱着に用いることで、再生ヒータの使用ユーティリティを削減でき、排ガス（Ｇ１）の温度によっては脱着に再生ヒータが不要になるからである。また、冷却回収装置１０へ排ガス（Ｇ１）および脱着ガス（Ｇ５）を通過させる割合は、排ガス（Ｇ１）が０％〜５０％であり、脱着ガス（Ｇ５）が５０％〜１００％であることが好ましい。 The high-temperature gas (G4) used for desorption of the concentration device 20 of the organic solvent recovery system in the embodiment of the present invention is a high-temperature state by using a heating means such as a regenerative heater for a part of the clean gas (G3) as described above. However, in the case where the temperature of the exhaust gas (G1) is 50 to 200 ° C., it is more preferable that a part of the exhaust gas (G1) is heated with a regenerative heater or the like. This is because the utility of the regenerative heater can be reduced by using the high-temperature exhaust gas for desorption, and the regenerative heater is not necessary for desorption depending on the temperature of the exhaust gas (G1). Further, the ratio of passing the exhaust gas (G1) and the desorption gas (G5) to the cooling recovery device 10 is that the exhaust gas (G1) is 0% to 50% and the desorption gas (G5) is 50% to 100%. Is preferred.
また、排ガス（Ｇ１）は、生産設備から排出されるガスである場合、清浄ガス（Ｇ３）の残部は、生産設備に戻される構成としても良い。 In addition, when the exhaust gas (G1) is a gas discharged from the production facility, the remaining portion of the clean gas (G3) may be returned to the production facility.
本発明の実施形態では、排ガス（Ｇ１）に含有する有機溶剤は、１℃〜５０℃の冷却にて液化して回収できる有機溶剤であることが好ましい。有機溶剤としては、たとえば、ｎ−メチル−２−ピロリドン、Ｎ，Ｎ−ジメチルホルムアミド、Ｎ，Ｎ−ジメチルアセトアミド、またはｎ−デカンが挙げられる。 In the embodiment of the present invention, the organic solvent contained in the exhaust gas (G1) is preferably an organic solvent that can be liquefied and recovered by cooling at 1 ° C to 50 ° C. Examples of the organic solvent include n-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, or n-decane.
このように、今回開示した上記各実施の形態はすべての点で例示であって、制限的なものではない。本発明の技術的範囲は特許請求の範囲によって画定され、また特許請求の範囲の記載と均等の意味および範囲内でのすべての変更を含むものである。 Thus, the above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
本発明による濃縮装置および有機溶剤回収システムは、脱着ガス中の一部の有機溶剤が液化凝縮しても、除去効率を低下させることなく、低コストに有機溶剤を回収できる利点があり、産業界への寄与大である。 The concentrator and the organic solvent recovery system according to the present invention have the advantage that even when a part of the organic solvent in the desorption gas is liquefied and condensed, the organic solvent can be recovered at a low cost without reducing the removal efficiency. The contribution to is great.
１０ 冷却回収装置
１１ 冷却凝縮装置
１２ 回収タンク
２０ 濃縮装置
２１ 脱着部
２２ 吸着部
２３ 回転軸
２４ 筒状吸着体
２５ 再生ヒータ
Ｇ１ 排ガス
Ｇ２ 有機溶剤含有ガス
Ｇ３ 清浄ガス
Ｇ４ 高温ガス
Ｇ５ 脱着ガス
Ｌ１ 配管ライン
DESCRIPTION OF SYMBOLS 10 Cooling recovery apparatus 11 Cooling condensing apparatus 12 Recovery tank 20 Concentrating apparatus 21 Desorption part 22 Adsorption part 23 Rotating shaft 24 Cylindrical adsorption body 25 Regenerative heater G1 Exhaust gas G2 Organic solvent containing gas G3 Clean gas G4 High temperature gas G5 Desorption gas L1 Piping line
Claims (9)
濃縮装置が前記吸着素子に前記排ガスが導入されることによって前記有機溶剤を前記吸着素子に吸着させて清浄ガスを排出する吸着部と、前記吸着素子に前記高温のガスが導入されることによって前記有機溶剤を前記吸着素子から脱着させて前記有機溶剤を含有する脱着ガスを排出する脱着部とを有しており、
濃縮装置の前記脱着部が、濃縮装置の前記吸着部よりも下部に配置され、濃縮装置に傾
斜をつけることで、脱着時および脱着後の冷却凝縮液の吸着素子への付着を抑制することを特徴とする濃縮装置。 A concentrating device comprising an adsorbing element for adsorbing the organic solvent by contacting exhaust gas containing an organic solvent and desorbing the organic solvent adsorbed by contacting gas at a temperature higher than the exhaust gas,
A concentrating device introduces the exhaust gas into the adsorbing element, adsorbs the organic solvent to the adsorbing element, and discharges clean gas, and introduces the high-temperature gas into the adsorbing element. A desorption part for desorbing an organic solvent from the adsorption element and discharging a desorption gas containing the organic solvent,
The desorption part of the concentrating device is disposed below the adsorption unit of the concentrating device and is inclined to the concentrating device.
A concentrating apparatus characterized by suppressing adhesion of the cooled condensate to the adsorbing element during and after desorption by applying a slant .
の移行の前に移行するパージ部を有し、前記吸着部から排出された前記清浄ガスの一部は
前記パージ部に導入され、前記パージ部から排出されたパージ部出口ガスは、前記吸着部
に導入される請求項１記載の濃縮装置。 A portion of the desorption unit of the concentrator where the desorption process of the adsorption element has been completed has a purge unit that moves before the transfer to the adsorption unit, and a part of the clean gas discharged from the adsorption unit is the It is introduced into the purge unit, the purge unit outlet gas discharged from the purge unit, concentrator of claim 1 wherein is introduced into the suction unit.
前記脱着ガスまたは前記排ガスを含むガスを冷却凝縮して前記有機溶剤を回収する冷却回収装置、を備えた有機溶剤回収システムであって、
前記脱着部が、前記吸着部よりも下部に配置され、かつ前記冷却回収装置よりも上部に配置され、前記冷却回収装置の導入ラインの冷却凝縮液の吸着素子への付着を抑制する有機溶剤回収システム。 An adsorbing element, an adsorbing section for introducing exhaust gas containing an organic solvent to adsorb the organic solvent to the adsorbing element and discharging a clean gas, and introducing the high-temperature gas into the adsorbing element A desorption part that desorbs from the adsorption element and discharges a desorption gas containing the organic solvent, and a concentrator, and
An organic solvent recovery system comprising a cooling recovery device that recovers the organic solvent by cooling and condensing the gas containing the desorption gas or the exhaust gas,
It said desorbing section, wherein arranged in the lower than the suction unit, and the cooling recovery device is disposed in the upper than the cooling recovery device organic you suppress the adhesion of the adsorption element of the cooling condensate inlet line of Solvent recovery system.
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