Power generating system including a gas/liquid separator

Patent metadata

Field	Value
Publication number	US-9470212-B2
Application number	US-201314058340-A
Country	US
Kind code	B2
Filing date	Oct 21, 2013
Priority date	Nov 1, 2012
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A flasher separates a geothermal fluid into steam and hot water. A steam turbine is driven by being supplied with the separated steam as a working medium. An evaporator is supplied with the steam from the steam turbine as a first heating medium, which is thereafter supplied to a first preheater via the evaporator. A superheater is supplied with the hot water separated by the flasher as a second heating medium, which is thereafter supplied to a second preheater via the superheater. A medium turbine is driven by being supplied, as a working medium, with a low-boiling-point medium having been heat-exchanged sequentially in the first preheater, the second preheater, the evaporator, and the superheater. In the evaporator and the first preheater, the low-boiling-point medium and the first heating medium are heat-exchanged. In the superheater and the second preheater, the low-boiling-point medium and the second heating medium are heat-exchanged.

First claim

What is claimed is:

1. A power generating system, comprising:
a flasher separating a geothermal fluid supplied from a production well into steam and hot water;
a steam turbine driven by being supplied with the steam separated by the flasher as a working medium;
an evaporator supplied with the steam discharged from the steam turbine as a first heating medium;
a first preheater supplied with the first heating medium via the evaporator;
a superheater supplied with the hot water separated by the flasher as a second heating medium from the flasher;
a second preheater supplied with the second heating medium via the superheater;
a medium turbine driven by being supplied with a low-boiling-point medium lower in boiling point than water as a working medium after the low-boiling-point medium is heat-exchanged in the first preheater, the second preheater, the evaporator, and the superheater in sequence; and
a gas/liquid separator supplied with the hot water separated by the flasher, via the superheater and separating the supplied hot water into steam and hot water by pressure-reducing the supplied hot water;
wherein, in the evaporator and the first preheater, the low-boiling-point medium and the first heating medium are heat-exchanged with each other;
wherein, in the superheater and the second preheater, the low-boiling-point medium and the second heating medium are heat-exchanged with each other;
wherein the hot water from which the steam is separated in the gas/liquid separator is supplied as the second heating medium to the second preheater; and
wherein, as the first heating medium, the steam separated from the hot water in the gas/liquid separator is supplied together with the steam discharged from the steam turbine, to the evaporator and the second preheater in sequence.

2. A power generating system, comprising:
a flasher separating a geothermal fluid supplied from a production well into steam and hot water;
a steam turbine driven by being supplied with the steam separated by the flasher as a working medium;
an evaporator supplied with the steam discharged from the steam turbine as a first heating medium;
a first preheater supplied with the first heating medium via the evaporator;
a superheater supplied with the hot water separated by the flasher as a second heating medium from the flasher;
a second preheater supplied with the second heating medium via the superheater;
a medium turbine driven by being supplied with a low-boiling-point medium lower in boiling point than water as a working medium after the low-boiling-point medium is heat-exchanged in the first preheater, the second preheater, the evaporator, and the superheater in sequence; and
a gas/liquid separator supplied with the hot water separated by the flasher, via the superheater and separating the supplied hot water into steam and hot water by pressure-reducing the supplied hot water;
wherein, in the evaporator and the first preheater, the low-boiling-point medium and the first heating medium are heat-exchanged with each other;
wherein, in the superheater and the second preheater, the low-boiling-point medium and the second heating medium are heat-exchanged with each other;
wherein the hot water from which the steam is separated in the gas/liquid separator is supplied as the second heating medium to the second preheater; and
wherein the steam separated from the hot water in the gas/liquid separator is supplied as a working medium to a turbine stage which is located more on a downstream side than a first turbine stage to which the steam separated by the flasher is supplied as the working medium, in the steam turbine.

3. The power generating system according to claim 1 , further comprising:
a condenser condensing the low-boiling-point medium discharged from the medium turbine; and
a medium pump supplying the low-boiling-point medium condensed by the condenser, to the medium turbine via the first preheater, the second preheater, the evaporator, and the superheater in sequence.

4. The power generating system according to claim 2 , further comprising:
a condenser condensing the low-boiling-point medium discharged from the medium turbine; and
a medium pump supplying the low-boiling-point medium condensed by the condenser, to the medium turbine via the first preheater, the second preheater, the evaporator, and the superheater in sequence.

Assignees

• Toshiba Kk

Inventors

• Hadianto Mohammad Ashari
• Taniguchi Akihiro
• Rodionov Mikhail
• Okita Nobuo
• Ito Shoko
• Yamashita Katsuya
• Furuya Osamu
• Takayanagi Mikio

Classifications

• Y02E10/10

  Geothermal energy · CPC title

• F01K23/02 Primary

  the engine cycles being thermally coupled · CPC title

• F03G7/04 Primary

  using pressure differences or thermal differences occurring in nature (F03G7/06 takes precedence) · CPC title

• F03G4/074

  Safety arrangements · CPC title