JP7468587B2 - Method and apparatus for separating mixtures - Google Patents

Method and apparatus for separating mixtures Download PDF

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JP7468587B2
JP7468587B2 JP2022145412A JP2022145412A JP7468587B2 JP 7468587 B2 JP7468587 B2 JP 7468587B2 JP 2022145412 A JP2022145412 A JP 2022145412A JP 2022145412 A JP2022145412 A JP 2022145412A JP 7468587 B2 JP7468587 B2 JP 7468587B2
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heat exchanger
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evaporator
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幸一 山崎
渊 唐
正康 那須
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Mitsubishi Chemical Engineering Corp
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本発明はエタノールと水、イソプロパノールと水などの、沸点の異なる複数成分の混合物を分離処理するための方法及び装置に関するものであり、好適には、混合物を蒸発缶で蒸発させた後、蒸発物から熱を回収する工程を有する混合物の分離方法及び装置に関する。 The present invention relates to a method and apparatus for separating a mixture of multiple components with different boiling points, such as ethanol and water, or isopropanol and water, and preferably relates to a method and apparatus for separating a mixture that includes a step of evaporating the mixture in an evaporator and then recovering heat from the evaporate.

エタノール等のアルコールと水との混合物を蒸発させた後、膜等によってエタノール等と水とに分離する方法及び装置が特許文献1,2に記載されている。 Patent documents 1 and 2 describe a method and apparatus for evaporating a mixture of alcohol such as ethanol and water, and then separating the mixture into ethanol and water using a membrane or the like.

特許文献1では、エタノールおよび水の混合物をエバポレータに供給してエタノールおよび水の該混合物を蒸発させ、エタノールおよび水の気化混合物をコンプレッサにて加圧した後、膜ユニットに供給し、エタノールとエタノール・水混合物とに分離する。 In Patent Document 1, a mixture of ethanol and water is supplied to an evaporator to evaporate the mixture of ethanol and water, and the vaporized mixture of ethanol and water is pressurized by a compressor and then supplied to a membrane unit to separate it into ethanol and an ethanol-water mixture.

特許文献2には、アルコール等と水との混合物を蒸留塔に供給し、留出物を第2圧縮機にて加圧・昇温した後、膜分離器によりアルコール等と、アルコール・水混合物とに分離し、この混合物を蒸留塔に戻すことが記載されている。蒸留塔にはリボイラが設けられている。特許文献2では、蒸留塔留出物の一部を分取して第1圧縮機にて加熱加圧し、このリボイラに加熱源流体として供給し、その後、蒸留塔塔頂に返送する。 Patent Document 2 describes a method of supplying a mixture of alcohol and water to a distillation tower, pressurizing and heating the distillate in a second compressor, and then separating the alcohol and water mixture into alcohol and water using a membrane separator, and returning the mixture to the distillation tower. The distillation tower is equipped with a reboiler. In Patent Document 2, a portion of the distillation tower distillate is separated and heated and pressurized in a first compressor, supplied to the reboiler as a heating source fluid, and then returned to the top of the distillation tower.

特許文献3には、ベンゼンとトルエンなどの混合液を熱交換器で加熱した後、蒸留塔で蒸留し、塔頂留出分をコンプレッサで加圧昇温した後、その一部を該混合液加熱用熱交換器に熱源流体として流通させることが記載されている。 Patent Document 3 describes a method in which a mixture of benzene, toluene, etc. is heated in a heat exchanger, then distilled in a distillation column, the overhead distillate is pressurized and heated in a compressor, and a portion of it is circulated as a heat source fluid through a heat exchanger for heating the mixture.

特表2011-513056号公報JP 2011-513056 A 特開2012-110832号公報JP 2012-110832 A 特開2012-45449号公報JP 2012-45449 A

特許文献1,2のように、エタノール等を含んだ蒸気をコンプレッサ(圧縮機)で加圧すると、コンプレッサにおいてオイル、グリース等の不純物が蒸気に混入し、製品の純度が低下するおそれがある。また、アルコール等の蒸気を加圧するコンプレッサには十分な防火、防爆機構が必要であると共に、コンプレッサに十分な防食性が必要となりコスト高となる。同様の課題は特許文献3でも生じる。特に塔頂留出分を回収目的成分とする場合に不純物混入が問題となる。 As in Patent Documents 1 and 2, when vapors containing ethanol or the like are compressed by a compressor, impurities such as oil and grease may be mixed into the vapor in the compressor, reducing the purity of the product. In addition, the compressor that compresses vapors of alcohol or the like needs to have sufficient fire and explosion protection mechanisms, and the compressor needs to be sufficiently corrosion-resistant, which increases costs. A similar problem occurs in Patent Document 3. The mixing of impurities is particularly problematic when the overhead distillate is the component to be recovered.

本発明は、混合物の加熱コストが安価であり、また製品への不純物混入を回避することができる混合物の分離方法及び装置を提供することを目的とする。 The present invention aims to provide a method and apparatus for separating a mixture that requires low heating costs and can prevent impurities from being mixed into the product.

本発明の混合物の分離方法は、混合物よりなる原料フィード液を分離器(5)にて分離する分離工程と、分離器(5)からの蒸気を熱交換器(9)で伝熱媒体と熱交換させた後、取り出す工程と、該熱交換器(9)で熱交換した伝熱媒体をコンプレッサ(20)で加圧昇温させる工程と、該コンプレッサ(20)からの伝熱媒体の蒸気を原料フィード液加熱用熱交換器(3)に通して原料フィード液を加熱する工程と、該原料フィード液加熱用熱交換器(3)を通過した伝熱媒体を熱交換器(9)に戻す工程とを有するものである。 The method for separating a mixture of the present invention includes a separation step of separating the raw feed liquid consisting of the mixture in a separator (5), a step of exchanging heat with a heat transfer medium in a heat exchanger (9) and then removing the steam from the separator (5), a step of pressurizing and heating the heat transfer medium that has been heat exchanged in the heat exchanger (9) in a compressor (20), a step of passing the steam of the heat transfer medium from the compressor (20) through a heat exchanger (3) for heating the raw feed liquid, and a step of returning the heat transfer medium that has passed through the heat exchanger (3) for heating the raw feed liquid to the heat exchanger (9).

本発明の混合物の分離装置は、混合物よりなる原料フィード液を蒸発させる分離器(5)と、分離器(5)からの蒸気を伝熱媒体と熱交換させる熱交換器(9)と、該熱交換器(9)で熱交換した伝熱媒体を加圧昇温させるコンプレッサ(20)と、該コンプレッサ(20)からの伝熱媒体の蒸気によって原料フィード液を加熱する原料フィード液加熱用熱交換器(3)とを有するものである。 The mixture separation device of the present invention has a separator (5) that evaporates the raw feed liquid consisting of the mixture, a heat exchanger (9) that exchanges heat between the steam from the separator (5) and a heat transfer medium, a compressor (20) that pressurizes and heats the heat transfer medium that has been heat exchanged in the heat exchanger (9), and a raw feed liquid heating heat exchanger (3) that heats the raw feed liquid with the steam of the heat transfer medium from the compressor (20).

本発明の一態様では、前記分離器は蒸発缶(5)であり、該蒸発缶(5)の缶底液の一部を缶底液用熱交換器(6)で加熱する。 In one embodiment of the present invention, the separator is an evaporator (5), and a portion of the bottom liquid of the evaporator (5) is heated in a bottom liquid heat exchanger (6).

本発明の一態様では、前記缶底液の残部を原料フィード液加熱用熱交換器(2)に通して原料フィード液を加熱する。 In one embodiment of the present invention, the remaining liquid from the bottom of the reactor is passed through a heat exchanger (2) for heating the raw feed liquid to heat the raw feed liquid.

本発明の一態様では、前記原料フィード液の一部を前記熱交換器(3)からの伝熱媒体が通される熱交換器(2A)によって加熱し、前記原料フィード液の残部を、前記缶底液の残部が通される熱交換器(2B)によって加熱することを特徴とする。 In one aspect of the present invention, a portion of the raw material feed liquid is heated by a heat exchanger (2A) through which the heat transfer medium from the heat exchanger (3) is passed, and the remainder of the raw material feed liquid is heated by a heat exchanger (2B) through which the remainder of the can bottom liquid is passed.

本発明の一態様では、前記蒸発缶(5)からの蒸気を熱交換器(9)で降温させた後、その一部を蒸発缶(5)に供給する。 In one embodiment of the present invention, the steam from the evaporator (5) is cooled in a heat exchanger (9) and then a portion of the steam is supplied to the evaporator (5).

本発明の一態様では、前記混合物は、メタノール・水、エタノール・水、イソプロパノール・水、ブタノール・水、酢酸・水、NMP(N-メチル-2-ピロリドン)・水、DMF(ジメチルホルムアミド)・水、DMAC(ジメチルアセトアミド)・水、アセトン・水、トルエン・水、THF(テトラヒドロフラン)・水、又は酢酸エチル・水の混合液であり、前記伝熱媒体は水であることを特徴とする。 In one aspect of the present invention, the mixture is a mixture of methanol/water, ethanol/water, isopropanol/water, butanol/water, acetic acid/water, NMP (N-methyl-2-pyrrolidone)/water, DMF (dimethylformamide)/water, DMAC (dimethylacetamide)/water, acetone/water, toluene/water, THF (tetrahydrofuran)/water, or ethyl acetate/water, and the heat transfer medium is water.

本発明では、原料フィード液を原料フィード液加熱用熱交換器で加熱後、蒸発缶や膜分離器等の分離器で分離処理して目的成分の蒸気と、水蒸気等の他成分とに分離する。そして、この目的成分蒸気の保有熱でヒートポンプの伝熱媒体を加熱して気化させ、生じた伝熱媒体の蒸気をコンプレッサで加圧昇温させて、原料フィード液加熱用の熱交換器に循環供給するようにしている。本発明は、伝熱媒体の蒸気をコンプレッサで加圧昇温させるようにしたものであり、特許文献1,2のようにエタノール・水等の混合蒸気をコンプレッサで加圧昇温するものではない。そのため、目的成分への不純物の混入を回避できる。また、原料フィード液の加熱をヒートポンプ方式としているので、原料フィード液の加熱コストを低くすることができる。 In the present invention, the raw material feed liquid is heated in a heat exchanger for heating the raw material feed liquid, and then separated in a separator such as an evaporator or a membrane separator into the vapor of the target component and other components such as water vapor. The heat transfer medium of the heat pump is then heated and vaporized using the heat contained in the vapor of the target component, and the resulting vapor of the heat transfer medium is pressurized and heated by a compressor and circulated to the heat exchanger for heating the raw material feed liquid. The present invention pressurizes and heats the vapor of the heat transfer medium using a compressor, and does not pressurize and heat a mixed vapor of ethanol, water, etc. using a compressor as in Patent Documents 1 and 2. This makes it possible to avoid the mixing of impurities into the target component. In addition, since the raw material feed liquid is heated using a heat pump method, the heating cost of the raw material feed liquid can be reduced.

また、本発明の一態様では、蒸発缶の缶底液を加熱する熱交換器の加熱源流体をコンプレッサで加圧昇温させるヒートポンプ方式としているため、蒸発缶の加熱コストを低くすることができる。 In addition, one aspect of the present invention uses a heat pump system in which a compressor is used to pressurize and heat the heat source fluid of the heat exchanger that heats the liquid at the bottom of the evaporator, thereby reducing the heating costs of the evaporator.

本発明の実施の形態を示す系統図である。1 is a system diagram showing an embodiment of the present invention. 別の実施の形態を示す系統図である。FIG. 11 is a system diagram showing another embodiment. 別の実施の形態を示す系統図である。FIG. 11 is a system diagram showing another embodiment.

以下、図面を参照して実施の形態について説明する。 The following describes the embodiment with reference to the drawings.

図1は本発明の一実施の形態を示す系統図であり、混合物(この実施の形態ではエタノール・水混合物)よりなる原料フィード液がポンプから配管1を介して熱交換器2,3に導入され、加熱された後、配管4を介して蒸発缶(エバポレータ)5に供給され、蒸発する。蒸発缶5の缶底液の一部が配管5a,5bを介して熱交換器6に導入され、加熱後、配管5cを介して蒸発缶5に戻される。また、缶底液の残部は、ポンプ5P、配管16を介して熱交換器2に導入され、混合物を加熱後、配管17を介して熱交換器18で冷却され、系外に取り出される。 Figure 1 is a system diagram showing one embodiment of the present invention, in which a raw material feed liquid consisting of a mixture (an ethanol-water mixture in this embodiment) is introduced from a pump through pipe 1 into heat exchangers 2 and 3, where it is heated and then supplied to evaporator 5 through pipe 4, where it is evaporated. A portion of the bottom liquid of evaporator 5 is introduced into heat exchanger 6 through pipes 5a and 5b, where it is heated and then returned to evaporator 5 through pipe 5c. The remaining bottom liquid is introduced into heat exchanger 2 through pump 5P and pipe 16, where the mixture is heated, and then cooled in heat exchanger 18 through pipe 17 and taken out of the system.

蒸発缶5からの留出分であるエタノール、水の混合蒸気は、配管8から熱交換器9に導入され、凝縮された後、配管10を介して還流槽11に導入され、還流槽11からポンプ12、配管13及び熱交換器14を経て、液体エタノールとして取り出される。ポンプ12から送り出されたエタノール及び水の一部は、配管13から分岐した配管13aに分流された後、熱交換器15で冷却され、蒸発缶5の上部に返送される。 The mixed vapor of ethanol and water, which is the distillate from the evaporator 5, is introduced from the pipe 8 into the heat exchanger 9, condensed, and then introduced into the reflux tank 11 via the pipe 10, from which it is extracted as liquid ethanol via the pump 12, the pipe 13, and the heat exchanger 14. A portion of the ethanol and water sent out from the pump 12 is diverted to the pipe 13a branched from the pipe 13, cooled in the heat exchanger 15, and returned to the top of the evaporator 5.

熱交換器9へは、気液分離器25内の伝熱媒体としての水が配管31、ポンプ32、配管33を介して導入される。この水が熱交換器9で加熱されて水蒸気が発生し、この水蒸気が気液分離器25に導入される。気液分離器25からの水蒸気は、配管26を介してコンプレッサ20に送られ、加圧昇温した水蒸気が、配管22を介して前述の混合物加熱用熱交換器3に供給される。熱交換器3で降温した水蒸気(及び生じた凝縮水)は、配管23、減圧弁24を介して気液分離器25に循環される。 Water as a heat transfer medium in the gas-liquid separator 25 is introduced into the heat exchanger 9 via piping 31, pump 32, and piping 33. This water is heated in the heat exchanger 9 to generate steam, which is then introduced into the gas-liquid separator 25. The steam from the gas-liquid separator 25 is sent to the compressor 20 via piping 26, and the pressurized and heated steam is supplied to the mixture heating heat exchanger 3 described above via piping 22. The steam (and the resulting condensed water) cooled in the heat exchanger 3 is circulated to the gas-liquid separator 25 via piping 23 and pressure reducing valve 24.

コンプレッサ20からの高温水蒸気の一部は、配管21から分岐した配管27を介して、前述の缶底液加熱用の熱交換器6に供給される。熱交換器6で降温した水蒸気(及び生じた凝縮水)は、配管28、減圧弁29を介して気液分離器25に循環される。 A portion of the high-temperature steam from the compressor 20 is supplied to the heat exchanger 6 for heating the can bottom liquid mentioned above via pipe 27 branching off from pipe 21. The steam (and the resulting condensed water) cooled in the heat exchanger 6 is circulated to the gas-liquid separator 25 via pipe 28 and pressure reducing valve 29.

この実施の形態では、上記の通り、原料フィード液(エタノール・水混合物)を熱交換器2,3で加熱後、蒸発缶5で蒸発させ、生じた蒸気の保有熱で熱交換器9にてヒートポンプの加熱媒体である水を加熱して気化させ、生じた水蒸気を気液分離器25及び配管26を介してコンプレッサ20で加圧昇温させ、配管21,22で混合物加熱用の熱交換器3に供給し、熱交換器3の流出水及び水蒸気を配管23、減圧弁24、気液分離器25を介して熱交換器9に循環供給するようにしている。 As described above, in this embodiment, the raw material feed liquid (ethanol-water mixture) is heated in heat exchangers 2 and 3, then evaporated in evaporator 5. The heat of the resulting steam is used to heat and vaporize water, the heating medium of the heat pump, in heat exchanger 9. The resulting water vapor is pressurized and heated by compressor 20 via gas-liquid separator 25 and piping 26, and supplied to heat exchanger 3 for heating the mixture via piping 21 and 22. The water and water vapor effluent from heat exchanger 3 are circulated and supplied to heat exchanger 9 via piping 23, pressure reducing valve 24, and gas-liquid separator 25.

このように、この実施の形態では、蒸発缶5で生じたエタノール蒸気と水蒸気との混合蒸気によって熱交換器9でヒートポンプの伝熱媒体(この実施の形態では水)を加熱した後、コンプレッサ20で加圧昇温し、熱交換器3に導入するようにしており、特許文献1,2のようにエタノール・水の混合蒸気をコンプレッサで加圧昇温しない。そのため、コンプレッサでの不純物混入がなく、得られるエタノールが高純度のものとなる。また、このヒートポンプ方式は加熱コストが低いと共に、コンプレッサ20は水蒸気を加圧するものであるため、防火、防爆機構が不要ないし簡易化される。 In this embodiment, the heat pump's heat transfer medium (water in this embodiment) is heated in heat exchanger 9 by the mixed vapor of ethanol vapor and water vapor generated in evaporator 5, and then pressurized and heated in compressor 20 and introduced into heat exchanger 3; unlike Patent Documents 1 and 2, the mixed vapor of ethanol and water is not pressurized and heated in a compressor. Therefore, no impurities are mixed in the compressor, and the ethanol obtained is of high purity. Furthermore, this heat pump method has low heating costs, and because compressor 20 pressurizes water vapor, fire and explosion-proof mechanisms are unnecessary or simplified.

この実施の形態では、熱交換器6で缶底液を加熱するように、コンプレッサ20で加圧昇温させた伝熱媒体(水蒸気)の一部を配管27で熱交換器6に供給し、熱交換器6からの伝熱媒体を配管28及び減圧弁29を介して気液分離器25に循環させている。 In this embodiment, a portion of the heat transfer medium (steam) pressurized and heated by compressor 20 is supplied to heat exchanger 6 via pipe 27 so that the can bottom liquid is heated in heat exchanger 6, and the heat transfer medium from heat exchanger 6 is circulated to gas-liquid separator 25 via pipe 28 and pressure reducing valve 29.

このように、蒸発缶5の缶底液を加熱する熱交換器6の加熱源流体である水蒸気をコンプレッサ20で加圧昇温させるヒートポンプ方式としているため、蒸発缶5の加熱コストを低くすることができる。 In this way, the heat pump system uses the compressor 20 to pressurize and heat the water vapor, which is the heating source fluid of the heat exchanger 6 that heats the bottom liquid of the evaporator 5, and this reduces the heating cost of the evaporator 5.

図2,3を参照して別の実施の形態について説明する。 Another embodiment will be described with reference to Figures 2 and 3.

図2では、原料フィード液の供給用配管1を途中で配管1A,1Bに並列状に分岐させ、各配管1A,1Bに熱交換器2A,2Bを設置し、各配管1A,1Bの末端を合流させて熱交換器3に接続している。熱交換器2Aには熱交換器3の流出伝熱媒体が配管3aを介して導入される。熱交換器2Aから流出した伝熱媒体は配管23及び減圧弁24を介して気液分離器25へ循環される。熱交換器2Bには、前記配管16から缶底液の一部が導入される。熱交換器2Bから流出した缶底液は、配管17、熱交換器18の順に流れる。 In FIG. 2, the raw material feed liquid supply pipe 1 is branched into pipes 1A and 1B in parallel along the way, heat exchangers 2A and 2B are installed in each pipe 1A and 1B, and the ends of each pipe 1A and 1B are joined and connected to heat exchanger 3. The outflowing heat transfer medium of heat exchanger 3 is introduced into heat exchanger 2A via pipe 3a. The heat transfer medium flowing out of heat exchanger 2A is circulated to gas-liquid separator 25 via pipe 23 and pressure reducing valve 24. A portion of the can bottom liquid is introduced into heat exchanger 2B from the above pipe 16. The can bottom liquid flowing out of heat exchanger 2B flows in the order of pipe 17 and heat exchanger 18.

図2のその他の構成は図1と同一であり、同一符号は同一部分を示している。 The rest of the configuration in Figure 2 is the same as in Figure 1, and the same reference numerals indicate the same parts.

図3では、蒸発缶5がフラッシュドラムとなっている。図3では、図2において、熱交換器9及び熱交換器(凝縮器)14で冷却されて生じた液体エタノールを凝縮液槽35に導入し、ポンプ36で送り出すようにしている。図3では缶底液を加熱するための熱交換器6は省略され、熱交換器6用の配管27,28も省略されている。また、フラッシュドラム5上部へのエタノール還流用の配管13a及び熱交換器15も省略されている。 In Figure 3, the evaporator 5 is a flash drum. In Figure 3, the liquid ethanol produced by cooling in the heat exchanger 9 and heat exchanger (condenser) 14 in Figure 2 is introduced into the condensate tank 35 and pumped out by the pump 36. In Figure 3, the heat exchanger 6 for heating the bottom liquid is omitted, and the pipes 27 and 28 for the heat exchanger 6 are also omitted. Also, the pipe 13a for returning ethanol to the top of the flash drum 5 and the heat exchanger 15 are omitted.

図3のその他の構成は図2と同一であり、同一符号は同一部分を示している。 The rest of the configuration in Figure 3 is the same as in Figure 2, and the same reference numerals indicate the same parts.

上記実施の形態では分離器として蒸発缶又はフラッシュドラムが用いられているが、膜分離器、吸着分離器等であってもよい。 In the above embodiment, an evaporator or flash drum is used as the separator, but a membrane separator, adsorption separator, etc. may also be used.

5 蒸発缶又はフラッシュドラム
20 コンプレッサ
25 気液分離器
5 Evaporator or flash drum 20 Compressor 25 Gas-liquid separator

Claims (11)

混合物よりなる原料フィード液を蒸発缶(5)にて分離する分離工程と、
蒸発缶(5)からの蒸気を熱交換器(9)で伝熱媒体と熱交換させた後、取り出す工程と、
該熱交換器(9)で熱交換した伝熱媒体をコンプレッサ(20)で加圧昇温させる工程と、
該コンプレッサ(20)からの伝熱媒体の蒸気を2つに分岐させ、分岐させた一方の蒸気を原料フィード液加熱用熱交換器(3)に通して原料フィード液を加熱する工程と、
該原料フィード液加熱用熱交換器(3)を通過した伝熱媒体を、冷却器を介することなく熱交換器(9)に戻す工程と、
該コンプレッサ(20)からの伝熱媒体の蒸気のうち分岐させた他方を缶底液用熱交換器(6)に通して缶底液の一部を加熱する工程と、
該缶底液用熱交換器(6)を通過した伝熱媒体を、冷却器を介することなく熱交換器(9)に戻す工程と、
を有する混合物の分離方法。
A separation step of separating the raw material feed liquid comprising the mixture in an evaporator (5);
a step of exchanging heat with a heat transfer medium in a heat exchanger (9) and then extracting the steam from the evaporator (5);
a step of pressurizing and heating the heat transfer medium that has been heat exchanged in the heat exchanger (9) by a compressor (20);
a step of branching the heat transfer medium vapor from the compressor (20) into two, and passing one of the branched vapors through a heat exchanger (3) for heating the raw material feed liquid;
returning the heat transfer medium that has passed through the raw material feed liquid heating heat exchanger (3) to the heat exchanger (9) without passing through a cooler ;
a step of passing the other branched portion of the heat transfer medium vapor from the compressor (20) through a can bottom liquid heat exchanger (6) to heat a portion of the can bottom liquid;
returning the heat transfer medium that has passed through the can bottom liquid heat exchanger (6) to the heat exchanger (9) without passing through a cooler ;
A method for separating a mixture having the following properties:
前記缶底液の残部を原料フィード液加熱用熱交換器(2)に通して原料フィード液を加熱することを特徴とする請求項1の混合物の分離方法。 The method for separating a mixture according to claim 1, characterized in that the remaining part of the bottom liquid is passed through a heat exchanger (2) for heating the raw material feed liquid to heat the raw material feed liquid. 前記原料フィード液の一部を前記熱交換器(3)からの伝熱媒体が通される熱交換器(2A)によって加熱し、
前記原料フィード液の残部を、前記缶底液の残部が通される熱交換器(2B)によって加熱することを特徴とする請求項1の混合物の分離方法。
a part of the raw material feed liquid is heated by a heat exchanger (2A) through which the heat transfer medium from the heat exchanger (3) is passed;
2. The method for separating a mixture according to claim 1, wherein the remainder of the raw material feed liquid is heated by a heat exchanger (2B) through which the remainder of the bottom liquid is passed.
前記蒸発缶(5)からの蒸気を熱交換器(9)で降温させた後、その一部を蒸発缶(5)に供給することを特徴とする請求項1~3のいずれかの混合物の分離方法。 A method for separating a mixture according to any one of claims 1 to 3, characterized in that the vapor from the evaporator (5) is cooled in a heat exchanger (9) and then a portion of the vapor is supplied to the evaporator (5). 前記混合物は、メタノール・水、エタノール・水、イソプロパノール・水、ブタノール・水、酢酸・水、NMP(N-メチル-2-ピロリドン)・水、DMF(ジメチルホルムアミド)・水、DMAC(ジメチルアセトアミド)・水、アセトン・水、トルエン・水、THF(テトラヒドロフラン)・水、又は酢酸エチル・水の混合液であり、前記伝熱媒体は水であることを特徴とする請求項1~4のいずれかの混合物の分離方法。 The method for separating a mixture according to any one of claims 1 to 4, characterized in that the mixture is a mixture of methanol/water, ethanol/water, isopropanol/water, butanol/water, acetic acid/water, NMP (N-methyl-2-pyrrolidone)/water, DMF (dimethylformamide)/water, DMAC (dimethylacetamide)/water, acetone/water, toluene/water, THF (tetrahydrofuran)/water, or ethyl acetate/water, and the heat transfer medium is water. 前記蒸発缶(5)からの蒸気を配管(8)で膜分離器を介することなく熱交換器(9)に導入し熱交換器(9)で伝熱媒体と熱交換させて凝縮させて凝縮液とし、この凝縮液を還流槽(11)に導入し、還流槽(11)からの凝縮液の一部を、ポンプ(12)及び配管(13)を経て取り出す工程と、
還流槽(11)からの凝縮液の残部を配管(13)から分岐した配管(13a)によって蒸発缶(5)の上部に返送する工程と、
をさらに有する請求項1~5のいずれかの混合物の分離方法。
a step of introducing the steam from the evaporator (5) through a pipe (8) into a heat exchanger (9) without passing through a membrane separator, condensing the steam by heat exchange with a heat transfer medium in the heat exchanger (9) to obtain a condensate, introducing the condensate into a reflux tank (11), and withdrawing a part of the condensate from the reflux tank (11) through a pump (12) and a pipe (13);
returning the remaining portion of the condensate from the reflux tank (11) to the upper part of the evaporator (5) through a pipe (13a) branched off from the pipe (13);
The method for separating a mixture according to any one of claims 1 to 5, further comprising:
混合物よりなる原料フィード液を分離する蒸発缶(5)と、
蒸発缶(5)からの蒸気を伝熱媒体と熱交換させる熱交換器(9)と、
該熱交換器(9)で熱交換した伝熱媒体を加圧昇温させるコンプレッサ(20)と、
冷却器を介することなく、該コンプレッサ(20)からの伝熱媒体の蒸気の一部によって缶底液の一部を加熱する缶底液用熱交換器(6)と
冷却器を介することなく、該コンプレッサ(20)からの伝熱媒体の蒸気の残部によって原料フィード液を加熱する原料フィード液加熱用熱交換器(3)と
を有する混合物の分離装置。
an evaporator (5) for separating the raw material feed liquid comprising the mixture;
a heat exchanger (9) for exchanging heat between the steam from the evaporator (5) and a heat transfer medium;
a compressor (20) for pressurizing and heating the heat transfer medium that has been heat exchanged in the heat exchanger (9);
a heat exchanger (6) for the can bottom liquid, which heats a part of the can bottom liquid by a part of the steam of the heat transfer medium from the compressor (20) without using a cooler;
and a heat exchanger (3) for heating the raw material feed liquid, which heats the raw material feed liquid with the remaining part of the heat transfer medium vapor from the compressor (20) without passing through a cooler .
前記缶底液の残部によって原料フィード液を加熱する原料フィード液加熱用熱交換器(2)を備えたことを特徴とする請求項7の混合物の分離装置。 The mixture separation apparatus according to claim 7, characterized in that it is provided with a heat exchanger (2) for heating the raw feed liquid, which heats the raw feed liquid with the remaining portion of the bottom liquid of the tank. 前記熱交換器(3)からの伝熱媒体によって原料フィード液の一部を加熱する熱交換器(2A)と、
前記缶底液の残部によって原料フィード液の残部を加熱する熱交換器(2B)と
を備えることを特徴とする請求項8の混合物の分離装置。
a heat exchanger (2A) for heating a part of the raw material feed liquid by the heat transfer medium from the heat exchanger (3);
9. The apparatus for separating a mixture according to claim 8, further comprising a heat exchanger (2B) for heating the remainder of the raw material feed liquid with the remainder of the bottom liquid.
前記熱交換器(9)で伝熱媒体と熱交換した蒸発缶留出物の一部を蒸発缶(5)に供給する返送手段を備えたことを特徴とする請求項7~9のいずれかの混合物の分離装置。 A mixture separation device according to any one of claims 7 to 9, characterized in that it is provided with a return means for supplying a portion of the evaporator distillate that has been heat exchanged with the heat transfer medium in the heat exchanger (9) to the evaporator (5). 前記熱交換器(9)は、蒸発缶(5)からの蒸気が配管(8)を介して且つ膜分離器を介することなく導入され、該蒸気を伝熱媒体と熱交換させて凝縮させて凝縮液とするものであり、
前記混合物の分離装置は、さらに、
熱交換器(9)からの凝縮液が導入される還流槽(11)と、
還流槽(11)からの凝縮液の一部を取り出すためのポンプ(12)及び配管(13)と、
還流槽(11)からの凝縮液の残部を蒸発缶(5)の上部に返送するための、配管(13)から分岐した配管(13a)と、
を有する請求項7~10のいずれかの混合物の分離装置。
The heat exchanger (9) is configured such that steam from the evaporator (5) is introduced through a pipe (8) without passing through a membrane separator, and the steam is subjected to heat exchange with a heat transfer medium to be condensed into a condensate,
The mixture separation device further comprises:
a reflux tank (11) into which the condensate from the heat exchanger (9) is introduced;
a pump (12) and a pipe (13) for removing a portion of the condensate from the reflux tank (11);
a pipe (13a) branched off from the pipe (13) for returning the remaining condensate from the reflux tank (11) to the top of the evaporator (5);
The mixture separation device according to any one of claims 7 to 10, comprising:
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