DISTILLATION APPARATUS

• Main Authors: WAKABAYASHI TOSHIHIRO, NAKAO KIMIHITO
• Format: Patent
• Language: English; Japanese
• Published: 04.06.2015
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

PROBLEM TO BE SOLVED: To suppress an increase in the cost of a distillation apparatus that has a plurality of distillation columns and furthermore to reduce a total energy consumption of the distillation apparatus.SOLUTION: The distillation apparatus includes a first distillation column and one or more second distillation columns. The first distillation column includes: a high pressure part that includes the whole or a part of a concentration part and makes gas-liquid contact at a relatively high pressure; a low pressure part that includes the whole or a part of a recovery part and makes liquid-gas contact at a relatively low pressure; a steam line including pressure increasing means that guides steam discharged out of the column apex of the low pressure part to the column bottom of the high pressure part; and a liquid line that guides liquid discharged out of the column bottom of the low pressure part to the column apex of the low pressure part. The distillation apparatus further includes: a first heat exchange structure so constituted as to transfer heat from the concentration part of the first distillation column to at least one distillation column of one or more second distillation columns by heat exchange; and a second heat exchange structure so constituted as to transfer heat from at least one distillation column of one or more second distillation columns to the recovery part of the first distillation column. 【課題】複数の蒸留塔を有する蒸留装置においてコスト上昇を抑えつつ総消費エネルギーを低減する。【解決手段】第一の蒸留塔と、一以上の第二の蒸留塔とを備え；第一の蒸留塔が、濃縮部の全部もしくは一部を含み相対的に高圧で気液接触を行う高圧部と、回収部の全部もしくは一部を含み相対的に低圧で液記接触を行う低圧部と、低圧部の塔頂部から排出される蒸気を高圧部の塔底部に導く、昇圧手段を備える蒸気用ラインと、高圧部の塔底部から排出される液を低圧部の塔頂部に導く液用ラインとを含み；第一の蒸留塔の濃縮部から、一以上の第二の蒸留塔のうちの少なくとも一つの蒸留塔に、熱交換によって熱を移動させるよう構成された第一の熱交換構造と、一以上の第二の蒸留塔のうちの少なくとも一つの蒸留塔から、第一の蒸留塔の回収部に、熱交換によって熱を移動させるよう構成された第二の熱交換構造とを含む蒸留装置。【選択図】図１