US2495550A - Operating gas heater for thermal power plants - Google Patents
Operating gas heater for thermal power plants Download PDFInfo
- Publication number
- US2495550A US2495550A US588186A US58818645A US2495550A US 2495550 A US2495550 A US 2495550A US 588186 A US588186 A US 588186A US 58818645 A US58818645 A US 58818645A US 2495550 A US2495550 A US 2495550A
- Authority
- US
- United States
- Prior art keywords
- combustion
- heater
- gas
- gases
- thermal power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C1/00—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid
- F02C1/04—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly
- F02C1/10—Closed cycles
Definitions
- This invention relates to a gas heater primarily intended for use in a thermal power plant in which at least the greater part of a gaseous working medium, preferably air, describes a closed circuit, being raised to a higher pressure in at least one compressor, then brought to a higher temperature in a heater by an indirect supply of heat from an external source and thereafter expanded in at least one turbine.
- a gaseous working medium preferably air
- the adoption of a high temperature for the combustion gases is often limited by other requirements.
- the temperature of the combustion gases at the inlet to the first heater tube nest be so low that a deposit of liquid ash on the heating surfaces is prevented with certainty.
- To bring about a reduction in the temperature of the combustion gases in front of the inlet to the heater tube nest it has further been proposed to mix these gases with returned flue gases. But the greater the quantity of flue gas that has to be returned, the greater also is the power consumed by the fan for circulating said portion of flu gas, which has a detrimental effect on the overall efliclency of the plant.
- fiue gases are only returned to the combustion chambers arranged in front of all the heating surfaces, this possibility depending upon the fact that in the remaining combustion chambers the gases coming from the preceding heating surfaces are already capable of lowering the temperature of the combustion gases sufliciently to ensure that flue gases need not also be returned to these chambers.
- This heater A comprises three combus tion chambers I, 2, 3 and three heating surfaces designed as tube nests 4, 5, 6.
- the tube nests 4, 5 and 6 are disposed in combustion-gas passes l, 8 and 9 respectively.
- the combustion chamber l is arranged in front of all tube nests 4, 5 and 6, whilst the combustion chamber 2 is situated between the two nests 4 and 5, which as regards the direction of flow of the flue gases are connected in series, and the combustion chamber 3 is situated between the two nests 5 and 6, which as regards the direction of flow of the flue gases are also connected in series.
- the com bustion chamber l arranged in front of all heating surfaces 5, 6, is situated before the lower part 'of the first tube nest 4, whilst the combustion chamber 2 is disposed between the upper parts of the two tube nests l, 5 and the combustion chamber 3 between the lower parts of the tube nests 5 and 6.
- the air to be heated in heat'er'A enters through a pipe ID into tube nest 6 and flows from the latter through a pipe H into tube nest 5 and from this through a pipe 12 into tube nest 4, where it is heated to the required final temperature.
- the air heated in this manner passes through a pipe is into a turbine M, in which it expands, this turbine delivering power to a compressor l5 and a generator IS.
- the air issuing from turbine l4 passes through a pipe I! into a heat exchanger [8 where it gives up heat to that part of the air which flows from the compressor l5 through a pipe l9 and. this heat exchanger I8 into the pipe l connected to the tube nest 6.
- the expanded air cooled in the heat exchanger I8 passes through a pipe and cooler 33 into the compressor l5 wherein it is re-compressed to a higher pressure and then forced into said pipe l9.
- a portion'of the flue gases is branched off behind the heater A at point 2
- a further portionof the flu gases issuing from the heater A passes into a heat exchanger 24 whereit serves for heating the fuel delivered by a fan 25 ;wliic'h has toi'be supplied to burners 26, 21,213 of .theconibustion chambers I, 2 and 3 respectively.
- the remaining flue gases pass into a heat exchanger 29 where they are employed for heating the combustion air required for the burners 26, 2-1, 28 and supplied by a fan 30.
- the fans 25iand 30 are driven by a motor .3l.
- the heater for the working medium comprise less or more than 'three heating sur faces connected to oneiano'ther in series in relation'to the direction offfio-w of the flue gasesgthen the fluegases arealso zreturned solely to'the combustion chamber arranged .in 'front of allheating surfaces.
- the invention .'is .particularly suited .for application whereLhigh velocities for the combustion gases .;are.adopted;in the heater for the working medium, i. e. when considerable pressure losses occur during the passage of these gases vthrough the heating surfaces. .lnsuch a case it is, on account lot the .power consumption, desirable if the cquantityrof flue gas .which .has :to .be returned to the combustionlcham'berof the heater for'the working .medium can .be kept as small as possible.
- each innit of the heat exchanger is multi-tubular and arranged with its tubes extending longitudinally through the correspondingcombustion-gas pass and wherein the connections between such heat exchangers are external to the :means enclosing the combustion chambers :and the 011]- bustion-gas passes.
- combustion-gas passes are substantially vertical zandlarrangediside by-side and (the various combustion chambers other than thefirst are in the form of enlargements interposed in approximately horizontal :connections between the :ends of adjacent combustioneg-as passes.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH592389X | 1944-05-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2495550A true US2495550A (en) | 1950-01-24 |
Family
ID=4522226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US588186A Expired - Lifetime US2495550A (en) | 1944-05-26 | 1945-04-13 | Operating gas heater for thermal power plants |
Country Status (3)
Country | Link |
---|---|
US (1) | US2495550A (es) |
BE (1) | BE460021A (es) |
GB (1) | GB592389A (es) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3227151A (en) * | 1963-05-01 | 1966-01-04 | Escher Wyss Ag | Tubular heater for closed-cycle gas turbine plant |
US3258508A (en) * | 1964-06-01 | 1966-06-28 | Fleur Corp | Heat transfer process |
US3640458A (en) * | 1969-05-02 | 1972-02-08 | Semia Sa | Hot air generator with variable length conduit |
US3965829A (en) * | 1974-02-25 | 1976-06-29 | The British Petroleum Company Limited | Boiler |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US164101A (en) * | 1875-06-08 | Improvement in warm-air furnaces | ||
US498826A (en) * | 1893-06-06 | Stove | ||
US1231373A (en) * | 1915-07-03 | 1917-06-26 | Olaf Jonsson | Draft device. |
US1650300A (en) * | 1925-12-17 | 1927-11-22 | Remondy Leon Emile | Percussion fuse for projectiles, aerial bombs, and the like |
US1789401A (en) * | 1929-01-08 | 1931-01-20 | Babcock & Wilcox Co | Air heater |
US2172910A (en) * | 1935-07-12 | 1939-09-12 | Ag Fuer Technische Studien | Power plant |
US2174663A (en) * | 1937-07-08 | 1939-10-03 | Ag Fuer Technische Studien | Tubular gas heater |
US2268074A (en) * | 1938-10-10 | 1941-12-30 | Tech Studien Ag | Protective means for the heaters of thermal circuits |
US2385177A (en) * | 1942-01-30 | 1945-09-18 | Tech Studien Ag | Gas heater |
US2422131A (en) * | 1943-05-03 | 1947-06-10 | Tech Studien Ag | Combined air heater for hot-air turbine and blast furnace |
-
0
- BE BE460021D patent/BE460021A/xx unknown
-
1945
- 1945-04-13 US US588186A patent/US2495550A/en not_active Expired - Lifetime
- 1945-05-23 GB GB12879/45A patent/GB592389A/en not_active Expired
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US164101A (en) * | 1875-06-08 | Improvement in warm-air furnaces | ||
US498826A (en) * | 1893-06-06 | Stove | ||
US1231373A (en) * | 1915-07-03 | 1917-06-26 | Olaf Jonsson | Draft device. |
US1650300A (en) * | 1925-12-17 | 1927-11-22 | Remondy Leon Emile | Percussion fuse for projectiles, aerial bombs, and the like |
US1789401A (en) * | 1929-01-08 | 1931-01-20 | Babcock & Wilcox Co | Air heater |
US2172910A (en) * | 1935-07-12 | 1939-09-12 | Ag Fuer Technische Studien | Power plant |
US2174663A (en) * | 1937-07-08 | 1939-10-03 | Ag Fuer Technische Studien | Tubular gas heater |
US2268074A (en) * | 1938-10-10 | 1941-12-30 | Tech Studien Ag | Protective means for the heaters of thermal circuits |
US2385177A (en) * | 1942-01-30 | 1945-09-18 | Tech Studien Ag | Gas heater |
US2422131A (en) * | 1943-05-03 | 1947-06-10 | Tech Studien Ag | Combined air heater for hot-air turbine and blast furnace |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3227151A (en) * | 1963-05-01 | 1966-01-04 | Escher Wyss Ag | Tubular heater for closed-cycle gas turbine plant |
US3258508A (en) * | 1964-06-01 | 1966-06-28 | Fleur Corp | Heat transfer process |
US3640458A (en) * | 1969-05-02 | 1972-02-08 | Semia Sa | Hot air generator with variable length conduit |
US3965829A (en) * | 1974-02-25 | 1976-06-29 | The British Petroleum Company Limited | Boiler |
Also Published As
Publication number | Publication date |
---|---|
BE460021A (es) | |
GB592389A (en) | 1947-09-16 |
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