Abstract: Embodiments of the invention provide a seawater desalination device, including a steam re-compressor configured to pressurize steam by pressurizing a steam; a first heat exchanger configured to exchange an amount of sensible heat of seawater to be desalinated with an amount of liquid sensible heat after pressurized steam is condensed, and an amount of sensible heat of a concentrated liquid after seawater is concentrated; a second heat exchanger configured to exchange an amount of heat of pressurized steam, an amount of latent heat of vaporization of seawater, and an amount of sensible heat when seawater is evaporated, and configured to concentrate seawater; a seawater supply means; a steam supply means; a first discharge means; a second discharge means; and a water-droplet separation means.

Abstract: A water-containing solid fuel drying apparatus that can efficiently dry with low energy consumption by effectively utilizing sensible heat and latent heat of a heating medium for drying, etc. is provided.

Abstract: A carbon dioxide gas recovery device is provided which includes an absorption tower causing an absorbent to absorb carbon dioxide gas to generate a rich absorbent and a regeneration tower regenerating a lean absorbent by heating the rich absorbent to separate carbon dioxide gas therefrom. The regeneration tower includes a reboiler system heating the absorbent led out from the regeneration tower and reintroducing the heated absorbent into the regeneration tower and a mixed gas cooling system cooling a mixed gas led out from the regeneration tower, condensing a vapor fraction of a solute and a solvent, reintroducing the condensed vapor fraction into the regeneration tower, and discharging carbon dioxide gas. The carbon dioxide gas recovery device further includes a heat pump as a heat source of an endothermic reaction in which carbon dioxide gas is separated from the rich absorbent in the regeneration tower.

Abstract: [Problem] To provide a membrane separation apparatus and a membrane separation method capable of reducing energy consumption, [Solution] A membrane separation apparatus (10) includes: a membrane separator (20) supplied with a fluid (X) containing a component (A) and a component (B) and separating the fluid (X) into a fluid (Y) having a higher concentration of the component (A) than the fluid (X) and a fluid (Z) having a lower concentration of the component (A) than the fluid (X) by using a separation membrane; a first compressor (21) adiabatically compressing the fluid (Y); a first heat exchanger (11) to which the fluid (Y) adiabatically compressed by the first compressor (21) is introduced as a heat source; and a second heat exchanger (12) to which the fluid (Z) is introduced as a heat source.

Abstract: Disclosed are a method for producing ethanol and a device for producing ethanol that are suitable to the recycled use of an enzyme. The device is configured from: a vacuum distillation tower (11) into which an ethanol-fermented liquid generated by saccharification fermentation of a biomass starting material is introduced, and with the interior in a state that is at a lower pressure than atmospheric pressure, that subjects the ethanol-fermented liquid to distillation, distilling ethanol vapor that contains water vapor, and removing as a bottom product the enzyme-containing concentrated waste liquid that is roused for saccharification fermentation of the biomass starting material; and a fractionating tower (12) for fractionating the ethanol vapor distilled from the vacuum distillation tower (11).

Abstract: Embodiments of the invention provide a seawater desalination device, including a steam re-compressor configured to pressurize steam by pressurizing a steam; a first heat exchanger configured to exchange an amount of sensible heat of seawater to be desalinated with an amount of liquid sensible heat after pressurized steam is condensed, and an amount of sensible heat of a concentrated liquid after seawater is concentrated; a second heat exchanger configured to exchange an amount of heat of pressurized steam, an amount of latent heat of vaporization of seawater, and an amount of sensible heat when seawater is evaporated, and configured to concentrate seawater; a seawater supply means; a steam supply means; a first discharge means; a second discharge means; and a water-droplet separation means.

Abstract: Disclosed are a method for producing ethanol and a device for producing ethanol that are suitable to the recycled use of an enzyme. The device is configured from: a vacuum distillation tower (11) into which an ethanol-fermented liquid generated by saccharification fermentation of a biomass starting material is introduced, and with the interior in a state that is at a lower pressure than atmospheric pressure, that subjects the ethanol-fermented liquid to distillation, distilling ethanol vapor that contains water vapor, and removing as a bottom product the enzyme-containing concentrated waste liquid that is roused for saccharification fermentation of the biomass starting material; and a fractionating tower (12) for fractionating the ethanol vapor distilled from the vacuum distillation tower (11).

Abstract: [Problem] To provide a membrane separation apparatus and a membrane separation method capable of reducing energy consumption, [Solution] A membrane separation apparatus (10) includes: a membrane separator (20) supplied with a fluid (X) containing a component (A) and a component (R) and separating the fluid (X) into a fluid (Y) having a higher concentration of the component (A) than the fluid (X) and a fluid (Z) having a lower concentration, of the component (A) than the fluid (X) by using a separation membrane; a first compressor (21) adiabatically compressing the fluid (Y); a first heat exchanger (11) to which the fluid (Y) adiabatically compressed by the first compressor (21) is introduced as a heat source; and a second heat exchanger (12) to which the fluid (Z) is introduced as a heat source.

Abstract: A carbon dioxide gas recovery device is provided which includes an absorption tower causing an absorbent to absorb carbon dioxide gas to generate a rich absorbent and a regeneration tower regenerating a lean absorbent by heating the rich absorbent to separate carbon dioxide gas therefrom. The regeneration tower includes a reboiler system heating the absorbent led out from the regeneration tower and reintroducing the heated absorbent into the regeneration tower and a mixed gas cooling system cooling a mixed gas led out from the regeneration tower, condensing a vapor fraction of a solute and a solvent, reintroducing the condensed vapor fraction into the regeneration tower, and discharging carbon dioxide gas. The carbon dioxide gas recovery device further includes a heat pump as a heat source of an endothermic reaction in which carbon dioxide gas is separated from the rich absorbent in the regeneration tower.

Abstract: A water-containing solid fuel drying apparatus that can efficiently dry with low energy consumption by effectively utilizing sensible heat and latent heat of a heating medium for drying, etc. is provided.