JP2004148169A - Solvent distillation system and solvent distillation method - Google Patents
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Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、ドライクリーニング工程などで発生する夾雑物を有する溶剤を再利用可能なように蒸留するための溶剤蒸留システムに関する。
【０００２】
【従来の技術】
ドライクリーニング溶剤としては、通常、石油系、塩素系の２種類のものが用いられ、塩素系溶剤としてはテトラクロロエチレン、１，１，１−トリクロロエタン、トリクロロトリフルオロエタン等が用いられている。これら溶剤は使用の結果、汚れ成分、埃、泥などの夾雑成分により汚染され、そのままでは使用できなくなる。
そこで溶剤は通常、蒸留により清澄化される。クリーニング店では、このために小型の蒸留装置を備えているところがある。このような蒸留装置としては特開平１１−２２１４０１号公報（特許文献１）で示されるようなものが知られている。
【０００３】
しかしながらそのような従来の蒸留装置では、処理に要するエネルギーが大きく、あるいは、１回の蒸留処理が終わるまでの時間が長く、これらの問題の解決が求められていた。
【０００４】
【特許文献１】
特開平１１−２２１４０１号公報（第２−３頁）
【０００５】
【発明が解決しようとする課題】
本発明は、上記した従来の問題点を改善する、すなわち、時間あたりの処理量が大きく、エネルギー効率の良い溶剤蒸留システムを提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明の溶剤蒸留システムは上記課題を解決するため、請求項１に記載の通り、熱交換器を備え、蒸留部に仕込まれる夾雑成分を有する被蒸留溶剤を該熱交換機により予備加熱するとともに蒸留部からの溶剤蒸気を液化させて回収する予備加熱部、予備加熱部で予備加熱された夾雑成分を有する被蒸留溶剤を加熱して濃縮し、濃縮重量質成分蒸留部に送り、かつ、溶剤液面上の溶剤蒸気を上記予備加熱部の熱交換器に送る蒸留部、及び、蒸留部で濃縮された夾雑成分を有する被蒸留溶剤をさらに加熱濃縮し、得られた溶剤蒸気を蒸留部の溶剤液面上ないし予備加熱部に送出する濃縮重量質成分蒸留部を備えた溶剤蒸留システムであり、このような構成により、蒸留部等で発生した溶剤蒸気の潜熱を予備加熱部で蒸留部に仕込まれる夾雑成分を有する被蒸留溶剤に与えることによりエネルギーの無駄を省くとともに、蒸留部である程度溶剤が除去された濃縮重量質成分を濃縮重量質成分蒸留部へ送り出してそこでさらに溶剤を回収することにより、長時間必要な、最終段階までの溶剤の回収を濃縮重量質成分蒸留部で行うとともに、蒸留部では新たな溶剤の蒸発を行うことができるため、装置運転の効率がよい。
【０００７】
請求項２の溶剤蒸留システムは請求項１の溶剤蒸留システムにおいて、上記予備加熱部が筒状体であって、該筒状体内部に蒸留部に仕込まれる夾雑成分を有する被蒸留溶剤が通過する蛇管を備え、該筒状体内に供給された蒸留部からの溶剤蒸気により該蛇管内の夾雑成分を有する被蒸留溶剤が加熱されるとともに、蛇管外で溶剤蒸気が冷却されて液化した溶剤を回収する回収口を有する溶剤蒸留システムである。
【０００８】
このような構成により、効果的に熱交換を行うことができ、さらに、予備加熱部部に冷却水用の蛇管を設けることにより、蒸留部に仕込まれる夾雑成分を有する被蒸留溶剤が供給されていないときにも溶剤蒸気の冷却・液化が可能となる。
【０００９】
請求項３の溶剤蒸留システムは請求項１または請求項２の溶剤蒸留システムにおいて、上記蒸留部の底部が波板形状であって、該波板形状の底部から加熱される溶剤蒸留システムである。このような構成により、蒸留部の溶剤の加熱の効率が良くなり、エネルギーを有効に利用することが可能となる。
【００１０】
請求項４の溶剤蒸留システムは請求項１ないし請求項３のいずれかの溶剤蒸留システムにおいて、上記濃縮重質分蒸留部の底部が平滑で、かつ、該底部に残留した残留分を掻き出せる掻き出し口を有する溶剤蒸留システムである。
この構成により、充分に溶剤が回収された残渣の濃縮重質分蒸留部からの除去が容易となり、運転が容易となる。
【００１１】
請求項５の溶剤蒸留システムは請求項１ないし請求項４のいずれかの溶剤蒸留システムにおいて、上記蒸留部の溶剤蒸気排出口と内部液面予定最高高さとの間に内部の溶剤の突沸を検知する突沸検知センサを有し、該突沸検知センサにより蒸留部内部の溶剤の突沸を検知した場合に、蒸留部の加熱を停止する加熱停止手段を有する溶剤蒸留システムである。
【００１２】
このような構成により、蒸留部内の溶剤の突沸による溶剤の予備加熱部への移動が防止され、予備加熱部で得られる回収溶剤の、突沸溶剤の影響による汚染を防止することができ、優れた溶剤を安定して得ることができ、突沸後の後処理（システム内の洗浄等）を不要とすることができる。
【００１３】
請求項６の溶剤蒸留システムは請求項１ないし請求項５のいずれかの溶剤蒸留システムにおいて、上記蒸留部内の溶剤が所定の液量以下となったことを検知する低液位センサを有し、蒸留部の加熱によって、内部の溶剤液量が該所定の液以下となったときに蒸留部の加熱を停止するとともに、蒸留部内部の濃縮された溶剤を濃縮重質分蒸留部に払い出す、濃縮溶剤払い出し手段を有する溶剤蒸留システムである。
このような構成により、例えば、蒸留部内の溶剤の時間あたりの蒸発量が少なくなる程度まで蒸留処理が至ったときに、その後の溶剤の回収を濃縮重質分蒸留部で引き続いて行い、蒸留部内には新たな溶剤を導入して溶剤回収を行うなどの、効率の良い運転を自動的に行うことができる。
【００１４】
【発明の実施の形態】
本発明の溶剤蒸留システムの一例を図面を用いて説明する。
図１はドライクリーニング工場での溶剤蒸留システムの例を示すモデル図である。
ドライクリーニング処理槽で発生した夾雑成分を有する溶剤は、ボタントラップ（ドライクリーニング処理で衣服から脱落するボタンやリント（綿くず）を捕捉するための装置）を経て矢印ｆ１のようにポンプＰ１によりバッファタンクに送られ、一時貯蔵・保管される。
【００１５】
バッファタンク内の溶剤は夾雑成分を有する被蒸留溶剤としてバッファタンク底部から矢印ｆ２のようにバルブＶ１を経てポンプＰ２により矢印ｆ３に沿って予備加熱部に送られる。
【００１６】
この予備加熱部Ａは図２に拡大して示すように筒状体（この例では円筒状体であるが、この例に限定されない）であって、筒状体内部に蒸留部に仕込まれる夾雑成分を有する被蒸留溶剤（矢印ｆ３から矢印ｆ４に向かって流れる）が通過する蛇管を備え、該筒状体内に供給された蒸留部からの溶剤蒸気（矢印ｆ７に沿って供給される）により該蛇管内の夾雑成分を有する被蒸留溶剤が加熱されるとともに、蛇管外、予備加熱部Ａ内部で溶剤蒸気が冷却されて液化した溶剤（その流れは矢印ｆ９に沿って流れる）を回収する回収口を有する。なお、この予備加熱部に図１及び図２に示すように冷却水用の蛇管を設け、矢印ｆ８、ｆ８’に沿って冷却水を流すことにより、蒸留部に仕込まれる夾雑成分を有する被蒸留溶剤が供給されていないときにも溶剤蒸気の冷却・液化が可能となっている。
【００１７】
予備加熱部Ａで予備加熱された溶剤は図１中矢印ｆ４に沿って流れ、第２予備加熱容器Ｄに蓄えられる。第２予備加熱容器には水蒸気用蛇管が設けられ矢印ｆ５及びｆ５’に沿って水蒸気が流れるようになっていて、予備加熱部での加熱が充分でないとき、また、予備加熱部に溶剤蒸気が来ていないとき、あるいは、すでに加熱された溶剤の保温のために、必要に応じて水蒸気が流される。
【００１８】
第２予備加熱容器は蒸留部より高い位置に設けてあるため、バルブＶ２を開くことにより内部の被蒸留溶剤は容易に蒸留部Ｂ内に仕込まれる。必要量の被蒸留溶剤が蒸留部Ｂに仕込まれた後、バルブＶ２は閉じられる。
【００１９】
蒸留部Ｂ底部は平面ではなく波板状になっていて蒸留部Ｂ底部に設けられた蒸留部加熱用ジャケット（この例では蒸気による加熱）から蒸留部Ｂ内の溶剤への熱伝導が効率よく行われるようになっている。なお、蒸留部Ｂ底部の形状は波板状であると記載したが、波板の形状は必ずしも平行である必要はなく、同心円状であっても、渦巻き状であっても良い。蒸留部Ｂ底部には濃縮重質分蒸留部Ｃに至る配管が設けられているが、渦巻き状の場合、蒸留部Ｂ内部の液すべてがこの配管へ導かれ、このとき蒸留部Ｂから濃縮重質分蒸留部Ｃへの液の移動が確実で残液が生じない。
【００２０】
蒸留部Ｂ内の被蒸留溶剤は蒸留部加熱用ジャケットから供給される熱により溶剤分のみが蒸発し、その溶剤蒸気は蒸留部Ｂ上部の溶剤蒸気排出口から矢印ｆ７に沿って予備加熱部Ａに供給され、そこで冷却されて蛇管外で液化し、清澄な溶剤として回収口から矢印ｆ９に沿って得られる。
【００２１】
なお、蒸留部Ｂの上部に設けられた溶剤蒸気排出口と蒸留部Ｂに仕込まれる溶剤の予定液面高さの最高地点（内部液面予定最高高さ）との間の壁面にセンサＳ１が設けられている。
【００２２】
センサＳ１は内部の溶剤の突沸を検知する突沸検知センサであって、本例ではＣＣＤカメラであり、突沸の有無を検知する。なおＣＣＤカメラの他、可視光ランプと受光部とを組み合わせたセンサ、サーミスタ温度センサ等で構成しても良い。この突沸検知センサＳ１により蒸留部内部の溶剤の突沸を検知した場合に、マイクロコンピュータ（図示しない）の働きで、蒸留部加熱用ジャケットに供給される水蒸気が遮断され、蒸留部Ｂの加熱は停止される。
【００２３】
このような働きにより、蒸留部Ｂ内の溶剤の突沸による溶剤の予備加熱部Ａへの移動が防止され、予備加熱部Ａで得られる回収溶剤の、突沸溶剤の影響による汚染を防止することができ、優れた溶剤を安定して得ることができ、突沸後の後処理（システム内の洗浄等）を不要とすることができる。
【００２４】
また、蒸発部Ｂ底部近くにはセンサＳ２（この例ではＣＣＤからなるセンサ）が設けられ、センサＳ２は蒸留部Ｂ内の溶剤の量が所定の液量以下となったことを検知する低液位センサであり、蒸留部Ｂの加熱によって、内部の溶剤液量が該所定の液以下となったときに、センサＳ２に接続されたマイクロコンピュータ（図示しない）、蒸留部Ｂの加熱を停止するとともに、蒸留部Ｂ内部の濃縮された溶剤を蒸留部Ｂ底部の配管に設けられたバルブＶ３を開放し、濃縮重質分蒸留部Ｃに払い出す。
【００２５】
このように図１の溶剤蒸留システムは、センサＳ２、マイクロコンピュータ、蒸留部加熱用ジャケットに供給される水蒸気の遮断弁（図示しない）及びバルブＶ３よりなる濃縮溶剤払い出し手段を有する。
【００２６】
このような構成により、例えば、蒸留部Ｂ内の溶剤の時間あたりの蒸発量が少なくなる程度まで蒸留処理が至ったときに、その後の溶剤の回収を濃縮重質分蒸留部で引き続いて行い、蒸留部Ｂ内には新たな溶剤を導入して溶剤回収を行うなどの、効率の良い運転を自動的に行うことができる。
【００２７】
なお、バルブＶ３は濃縮溶剤払い出し手段のマイクロコンピュータの働きで、蒸留部Ｂ内部の溶剤の濃縮重質分蒸留部Ｃへの移動完了時間に相当する所定時間経過後、自動的に閉まる。
【００２８】
濃縮重質分蒸留部Ｃに供給された溶剤（濃縮重質分）は可溶・不溶の多量の夾雑物を含み、そこからの溶剤の充分な回収は長時間必要である。このため、蒸留部Ｂでの蒸留は装置利用効率が悪い。そこで蒸留部Ｂとは別に、濃縮重質分蒸留部Ｃを設けてそこで溶剤の回収を行う。
【００２９】
濃縮重質分蒸留部Ｃには濃縮重質分蒸留部加熱用ヒータが設けられ、溶剤の回収に必要な温度に加熱される。濃縮重質分蒸留部Ｃで回収された溶剤の蒸気は図中矢印ｆ１１に沿って流れ、最終的に予備加熱部Ａに至りそこで冷却され、液化される。なお、濃縮重質分蒸留部Ｃで発生した溶剤蒸気は、蒸留部Ｂの液面より高い位置（液面上）に供給されても良い。
【００３０】
濃縮重質分蒸留部Ｃで充分に溶剤が回収された残渣である残留分は濃縮重質分蒸留部Ｃに設けられた掻き出し口（図示しない。開閉可能な扉を有する）から回収される。このときこの例では濃縮重質分蒸留部Ｃの底部が平滑であるため、掻き出しが容易である。
【００３１】
上記では溶剤蒸留システムがドライクリーニング処理槽とボタントラップ及びバッファタンクを介して直結された例を示したが、これらとは別に、溶剤蒸留装置として単独の装置となっていても良く、その場合も本発明に属する。
【００３２】
【発明の効果】
本発明の溶剤蒸留システムは時間あたりの処理量が大きく、エネルギー効率の良い溶剤蒸留システムである。
【図面の簡単な説明】
【図１】本発明に係る溶剤蒸留システムの一例を示すモデル図である。
【図２】図１の溶剤蒸留システムの予備加熱部の部分拡大断面モデル図である
【符号の説明】
Ａ 予備加熱部
Ｂ 蒸留部Ｂ
Ｃ 濃縮重質分蒸留部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a solvent distillation system for distilling a solvent having impurities generated in a dry cleaning step or the like so that the solvent can be reused.
[0002]
[Prior art]
As the dry cleaning solvent, two kinds of petroleum-based and chlorine-based solvents are usually used, and as the chlorine-based solvent, tetrachloroethylene, 1,1,1-trichloroethane, trichlorotrifluoroethane, or the like is used. As a result of use, these solvents are contaminated with contaminants such as dirt components, dust, and mud, and cannot be used as they are.
There, the solvent is usually clarified by distillation. Some cleaning shops have a small distillation apparatus for this purpose. As such a distillation apparatus, a distillation apparatus as disclosed in JP-A-11-221401 (Patent Document 1) is known.
[0003]
However, in such a conventional distillation apparatus, the energy required for the treatment is large, or the time required for one distillation treatment to be completed is long, so that a solution to these problems has been demanded.
[0004]
[Patent Document 1]
JP-A-11-222401 (pages 2-3)
[0005]
[Problems to be solved by the invention]
An object of the present invention is to improve the above-mentioned conventional problems, that is, to provide a solvent distillation system having a large throughput per time and high energy efficiency.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the solvent distillation system of the present invention includes a heat exchanger, and pre-heats and distills a solvent to be distilled having an impurity component to be charged into a distillation section by the heat exchanger. A preheating section for liquefying and recovering the solvent vapor from the section, the solvent to be distilled having the contaminant component preheated in the preheating section is heated and concentrated, sent to the concentrated heavy component distillation section, and the solvent liquid The distillation section for sending the solvent vapor on the surface to the heat exchanger of the preheating section, and the solvent to be distilled having the contaminant components concentrated in the distillation section is further heated and concentrated, and the obtained solvent vapor is dissolved in the solvent in the distillation section. This is a solvent distillation system equipped with a concentrated heavy component distillation section that sends out the liquid level or to the preheating section. With this configuration, the latent heat of the solvent vapor generated in the distillation section and the like is charged to the distillation section by the preheating section. Contamination components Energy is saved by giving it to the solvent to be distilled, and the concentrated heavy component from which the solvent has been removed to some extent in the distillation section is sent to the concentrated heavy component distillation section, and the solvent is recovered there, thereby requiring a long time. In addition, the solvent can be recovered up to the final stage in the concentrated heavy component distillation section, and a new solvent can be evaporated in the distillation section, so that the operation efficiency of the apparatus is high.
[0007]
According to a second aspect of the present invention, in the solvent distillation system according to the first aspect, the preheating unit is a cylindrical body, and the solvent to be distilled having impurities contained in the distillation unit passes through the cylindrical body. A solvent pipe is provided, and the solvent vapor from the distillation section supplied into the cylindrical body heats the solvent to be distilled having contaminant components inside the coil pipe, and the solvent vapor is cooled outside the coil pipe to recover the liquefied solvent. This is a solvent distillation system having a recovery port to perform.
[0008]
With such a configuration, heat exchange can be performed effectively, and further, by providing a coiled pipe for cooling water in the preheating section, the solvent to be distilled having the impurity components charged to the distillation section is supplied. Cooling and liquefaction of the solvent vapor is possible even when there is no solvent vapor.
[0009]
The solvent distillation system according to a third aspect is the solvent distillation system according to the first or second aspect, wherein the bottom of the distillation unit has a corrugated plate shape and is heated from the corrugated plate bottom. With such a configuration, the efficiency of heating the solvent in the distillation section is improved, and energy can be effectively used.
[0010]
A solvent distillation system according to a fourth aspect of the present invention is the solvent distillation system according to any one of the first to third aspects, wherein the bottom of the concentrated heavy fraction distillation section is smooth, and the residue remaining on the bottom is scraped. It is a solvent distillation system having a mouth.
With this configuration, the residue from which the solvent has been sufficiently recovered can be easily removed from the concentrated heavy fraction distillation section, and the operation can be facilitated.
[0011]
According to a fifth aspect of the present invention, there is provided the solvent distillation system according to any one of the first to fourth aspects, wherein the bumping of the internal solvent is detected between the solvent vapor discharge port of the distillation section and a predetermined maximum internal liquid level. And a heating stop means for stopping the heating of the distillation section when the bumping detection sensor detects the bumping of the solvent inside the distillation section.
[0012]
With such a configuration, movement of the solvent in the distillation section due to bumping of the solvent is prevented from moving to the preheating section, and the recovered solvent obtained in the preheating section can be prevented from being contaminated by the influence of the bumping solvent. The solvent can be obtained stably, and post-treatment after bumping (such as cleaning the inside of the system) can be eliminated.
[0013]
The solvent distillation system according to claim 6 is the solvent distillation system according to any one of
With such a configuration, for example, when the distillation treatment has been performed to such an extent that the evaporation amount of the solvent in the distillation section per hour is reduced, the subsequent recovery of the solvent is continuously performed in the concentrated heavy fraction distillation section, and the distillation in the distillation section is performed. For example, efficient operation such as introducing a new solvent and recovering the solvent can be automatically performed.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An example of the solvent distillation system of the present invention will be described with reference to the drawings.
FIG. 1 is a model diagram showing an example of a solvent distillation system in a dry cleaning factory.
The solvent having impurities contained in the dry cleaning tank is buffered by a pump P1 as indicated by an arrow f1 through a button trap (a device for catching buttons and lint (cotton lint) that fall off from clothes in the dry cleaning processing). It is sent to a tank and stored temporarily.
[0015]
The solvent in the buffer tank is sent from the bottom of the buffer tank as a solvent to be distilled having contaminants to the preheating section along the arrow f3 by the pump P2 via the valve V1 as shown by the arrow f2.
[0016]
The preheating section A is a cylindrical body (in this example, a cylindrical body, but not limited to this example) as shown in an enlarged manner in FIG. 2, and contaminants charged into the distillation section inside the cylindrical body. A solvent pipe (flowing from the arrow f3 to the arrow f4) through which the solvent to be distilled is passed, and a solvent vapor (supplied along the arrow f7) from the distillation unit supplied into the cylindrical body is provided. A recovery port for heating the solvent to be distilled having contaminant components inside the flexible pipe and recovering the liquefied solvent (the flow of which flows along arrow f9) as the solvent vapor is cooled outside the flexible pipe and inside the preliminary heating section A. Having. In addition, as shown in FIG. 1 and FIG. 2, a coil for cooling water is provided in the preheating section, and the cooling water is caused to flow along arrows f8 and f8 ′. Cooling and liquefaction of the solvent vapor is possible even when the solvent is not supplied.
[0017]
The solvent preheated in the preheating section A flows along the arrow f4 in FIG. 1 and is stored in the second preheating vessel D. The second preheating vessel is provided with a water vapor snake tube so that steam flows along arrows f5 and f5 ′, and when the heating in the preheating section is not sufficient, the solvent vapor is supplied to the preheating section. If not, or if necessary to keep the heated solvent warm, steam may be flowed in as needed.
[0018]
Since the second preheating vessel is provided at a position higher than the distillation section, the solvent to be distilled inside is easily charged into the distillation section B by opening the valve V2. After the required amount of the solvent to be distilled is charged into the distillation section B, the valve V2 is closed.
[0019]
The bottom of the distillation section B is not flat but has a corrugated plate shape, and heat conduction from the jacket for heating the distillation section (heated by steam in this example) provided at the bottom of the distillation section B to the solvent in the distillation section B is efficient. Is being done. The shape of the bottom of the distillation section B is described as a corrugated plate, but the shape of the corrugated plate is not necessarily parallel, and may be concentric or spiral. A pipe extending to the concentrated heavy fraction distillation section C is provided at the bottom of the distillation section B. In the case of a spiral shape, all of the liquid inside the distillation section B is led to this pipe. The liquid is reliably transferred to the mass distillation section C, and no residual liquid is generated.
[0020]
Only the solvent component of the solvent to be distilled in the distillation section B evaporates due to the heat supplied from the heating jacket for the distillation section, and the solvent vapor is discharged from the solvent vapor discharge port above the distillation section B along the arrow f7 to the preheating section A. Where it is cooled and liquefied outside the flexible tube and obtained as a clear solvent from the recovery port along arrow f9.
[0021]
The sensor S1 is provided on the wall surface between the solvent vapor discharge port provided at the upper part of the distillation section B and the highest point of the expected liquid level of the solvent to be charged into the distillation section B (the expected internal liquid level). Is provided.
[0022]
The sensor S1 is a bumping detection sensor that detects bumping of the internal solvent, and in this example, is a CCD camera, and detects the presence or absence of bumping. Note that, other than the CCD camera, a sensor combining a visible light lamp and a light receiving unit, a thermistor temperature sensor, or the like may be used. When the bumping detection sensor S1 detects bumping of the solvent in the distillation section, the microcomputer (not shown) shuts off the steam supplied to the distillation section heating jacket and stops heating the distillation section B. Is done.
[0023]
By such an operation, the solvent is prevented from moving to the preheating section A due to bumping of the solvent in the distillation section B, and the recovery solvent obtained in the preheating section A is prevented from being contaminated by the influence of the bumping solvent. As a result, an excellent solvent can be obtained stably, and post-treatment after bumping (such as washing the system) can be eliminated.
[0024]
A sensor S2 (in this example, a sensor composed of a CCD) is provided near the bottom of the evaporating section B. The microcomputer (not shown) connected to the sensor S2 stops heating of the distillation unit B when the amount of the solvent in the distillation unit B falls below the predetermined level due to the heating of the distillation unit B. At the same time, the concentrated solvent in the distillation section B is discharged to the concentrated heavy fraction distillation section C by opening the valve V3 provided in the pipe at the bottom of the distillation section B.
[0025]
As described above, the solvent distillation system of FIG. 1 includes the sensor S2, the microcomputer, the shutoff valve (not shown) for the steam supplied to the distillation section heating jacket, and the concentrated solvent discharging means including the valve V3.
[0026]
With such a configuration, for example, when the distillation process has been performed to the extent that the amount of the solvent in the distillation unit B per unit time decreases, the subsequent recovery of the solvent is continuously performed in the concentrated heavy fraction distillation unit, Efficient operation such as introducing a new solvent into the distillation section B and recovering the solvent can be automatically performed.
[0027]
The valve V3 is automatically closed after a predetermined time corresponding to the time required for completing the transfer of the solvent inside the distillation section B to the concentrated heavy fraction distillation section C by the microcomputer of the concentrated solvent discharging means.
[0028]
The solvent (concentrated heavy fraction) supplied to the concentrated heavy fraction distillation section C contains a large amount of soluble and insoluble contaminants, from which sufficient recovery of the solvent is required for a long time. For this reason, distillation in the distillation section B has a low device utilization efficiency. Therefore, separately from the distillation section B, a concentrated heavy fraction distillation section C is provided, and the solvent is recovered there.
[0029]
The concentrated heavy fraction distillation section C is provided with a heater for heating the concentrated heavy fraction distillation section, and is heated to a temperature required for recovering the solvent. The vapor of the solvent recovered in the concentrated heavy fraction distillation section C flows along the arrow f11 in the figure, and finally reaches the preheating section A where it is cooled and liquefied. The solvent vapor generated in the concentrated heavy fraction distillation section C may be supplied to a position higher than the liquid level of the distillation section B (on the liquid level).
[0030]
The residue, which is the residue from which the solvent has been sufficiently recovered in the concentrated heavy fraction distillation section C, is recovered from a scraping port (not shown, which has an openable door) provided in the concentrated heavy fraction distillation section C. At this time, in this example, since the bottom of the concentrated heavy fraction distillation section C is smooth, scraping is easy.
[0031]
In the above, the example in which the solvent distillation system is directly connected via the dry cleaning tank and the button trap and the buffer tank is shown, but separately from these, the solvent distillation apparatus may be a single apparatus as a solvent distillation apparatus. It belongs to the present invention.
[0032]
【The invention's effect】
The solvent distillation system of the present invention is a solvent distillation system that has a large throughput per hour and is energy efficient.
[Brief description of the drawings]
FIG. 1 is a model diagram showing an example of a solvent distillation system according to the present invention.
FIG. 2 is a partially enlarged cross-sectional model diagram of a preheating unit of the solvent distillation system of FIG.
A Preheating section B Distillation section B
C Concentrated heavy fraction distillation section
Claims (6)
予備加熱部で予備加熱された夾雑成分を有する被蒸留溶剤を加熱して濃縮し、濃縮重量質成分蒸留部に送り、かつ、溶剤液面上の溶剤蒸気を上記予備加熱部の熱交換器に送る蒸留部、及び、
蒸留部で濃縮された夾雑成分を有する被蒸留溶剤をさらに加熱濃縮し、得られた溶剤蒸気を蒸留部の溶剤液面上ないし予備加熱部に送出する濃縮重量質成分蒸留部を備えたことを特徴とする溶剤蒸留システム。A pre-heating unit that includes a heat exchanger and pre-heats the solvent to be distilled having contaminant components charged to the distillation unit by the heat exchanger and liquefies and collects solvent vapor from the distillation unit;
The solvent to be distilled having the contaminant component preheated in the preheating section is heated and concentrated, sent to the concentrated heavy component distillation section, and the solvent vapor on the solvent liquid level is transferred to the heat exchanger of the preheating section. Distillation section to send, and
The method further comprises the step of further heating and concentrating the solvent to be distilled having the contaminant components concentrated in the distillation section, and the concentrated heavy component distillation section for sending the obtained solvent vapor on the solvent liquid surface of the distillation section or to the preheating section. Characterized solvent distillation system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002314435A JP4316856B2 (en) | 2002-10-29 | 2002-10-29 | Solvent distillation system for dry cleaning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002314435A JP4316856B2 (en) | 2002-10-29 | 2002-10-29 | Solvent distillation system for dry cleaning |
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| Publication Number | Publication Date |
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| JP2004148169A true JP2004148169A (en) | 2004-05-27 |
| JP4316856B2 JP4316856B2 (en) | 2009-08-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007069718A1 (en) | 2005-12-16 | 2007-06-21 | Techno Sigma Co., Ltd. | Vaporizing separator for liquid medium and the like |
| CN114146436A (en) * | 2021-10-29 | 2022-03-08 | 四川天宇油脂化学有限公司 | Short-range distiller for fatty amide production |
-
2002
- 2002-10-29 JP JP2002314435A patent/JP4316856B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007069718A1 (en) | 2005-12-16 | 2007-06-21 | Techno Sigma Co., Ltd. | Vaporizing separator for liquid medium and the like |
| CN114146436A (en) * | 2021-10-29 | 2022-03-08 | 四川天宇油脂化学有限公司 | Short-range distiller for fatty amide production |
| CN114146436B (en) * | 2021-10-29 | 2023-06-27 | 四川天宇油脂化学有限公司 | Short-range distiller for fatty amide production |
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| JP4316856B2 (en) | 2009-08-19 |
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