Method for adding water to a heat exchanging system

• US 4,448,018 A
• Filed: 11/23/1981
• Issued: 05/15/1984
• Est. Priority Date: 11/25/1980
• Status: Expired due to Term

• Current Assignee: Mitsubishi Gas Chemical Company Incorporated (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Gas Chemical Company Incorporated (Mitsubishi Electric Corporation)
• Inventors: Nakamura, Hiromi, Sayama, Norio
• Primary Examiner(s): Casaregola, Louis J.
• Application Number:
  US06/324,096
• Time in Patent Office: 904 Days
• Field of Search: 60/39.05, 60/39.465, 60/39.53, 60/39.55, 60/39.58, 60/39.59, 60/728, 60/39.511
• US Class Current: 60/775
• CPC Class Codes: F01K 21/047 having at least one combustion gas turbine

Abstract

A method and system for operating a regenerative gas turbine in which a compressed gaseous medium is saturated with steam from untreated water having impurities in a first contact chamber and then supplied to a second chamber where the mixture is washed with pure water to remove impurities. The resulting mixture is mixed with fuel and combusted to supply gas to the turbine. Exhaust gas from the turbine is supplied to two serially connected regenerators which transfer heat to the recirculating untreated and pure water.

Claims

1. A method for operating a regenerative gas turbine cycle to recover heat from the exhaust gas of a turbine comprising the steps of:

compressing a gaseous medium to a predetermined pressure;

saturating the compressed gaseous medium with steam from untreated water containing impurities to form a mixture of said gaseous medium and steam;

washing said mixture with pure water to remove said impurities;

transferring heat from said exhaust gas to said mixture;

mixing the heated mixture with fuel and combusting to drive said turbine; and

discharging the exhaust gas after the heat transfer.

2. A method as in claim 1, wherein said step of compressing includes compressing in at least two steps producing an intermediate compressed medium having waste heat and including the step of transferring said waste heat to said untreated water before saturating and to said pure water before washing.

3. A method as in claim 1, including the further step of adding the used pure water to said untreated water after washing.

4. A method as in claim 1, wherein said step of saturating includes the steps of introducing said untreated water into a first contact chamber so that the introduced water falls to the bottom thereof and recirculating water in the bottom of said chamber to region of introduction and including the further step of transferring heat from said exhaust to the recirculating water.

5. A regenerative gas turbine system comprising:

a gas turbine for the production of power;

a compressor driven by the gas turbine for compressing a gaseous medium to a predetermined pressure;

means for supplying said medium to said compressor;

a first contacting chamber for saturating a compressed gaseous medium with steam from untreated water containing impurities to form a mixture of steam and said compressed medium;

means for supplying said medium to said first chamber;

means for supplying said untreated water to the upper portion of said first chamber;

at least two regenerators mounted in series for receiving exhaust gas from the gas turbine;

means for recirculating untreated water accumulated in the bottom of the first chamber through one of said regenerators to the top thereof so as to transfer heat to the recirculating water;

a second contacting chamber for washing the mixture with pure water to remove said impurities;

means for supplying said pure water to the upper portion of said second chamber;

means for supplying used pure water accumulated in the bottom of said second chamber to the upper portion of said first chamber;

a combustion chamber;

means for supplying the washed mixture to said combustion chamber;

means for supplying fuel to said combustion chamber for combustion to produce a burned gas discharge;

means for supplying said discharge to said turbine;

and

means for supplying the exhaust gas from said turbine to said regenerators.

6. A system as in claim 5, wherein said recirculating means includes means for discharging said untreated water from the system when it is too dirty.

7. A system as in claim 5, wherein said compressor is a two stage compressor producing an intermediate compressed medium having waste heat therein and including heat exchange means for transferring said waste heat to said medium and said untreated water before introduction into said first chamber.

8. A system as in claim 5, further including second means for recirculating said pure water from the top to the bottom of said second chamber through one of said regenerators to transfer heat to the recirculating pure water.