US1829749A - Combined steam and combustion gas power plant - Google Patents

Description

Nov. 3, 1931. H. HOLZWARTH COEBINED STEAM AND COMBUSTION GAS POWER PLANT Filed Oct. 2, 1926 mv NTOR l /gms OLZWHIZTI/ ATTORNEYS Patented Nov; 3, 1931 f mm STATES PATENT OFFICE nAivs HOLZWARTH; F DUSSELDORF, GERMANY, ASSIGNOR 'ro HOLZWARTH GAS TUR-BINE'CQ, oF-sAN FRANCISCO, CALIFORNIA, A CORPORATION OF DELAWARE COMBINED STEAM AND COMBUSTION GAS POWER PLANT U Myzpresent invention relates to power plants utilizing both steam and explosion gases as the driving medium, and has for its object to derive the heat required for the generation of steam, solely from the explosion gases serving as a power medium. so as to avoid the use of any separate steam boiler furnace. In the preferred formotmy invention, power is developed in three stages,

the high pressure stage usingjets of explosion gases as a driving medium, the latter also serving to heat the steam which ison its way to the intermediate pressure stage; this s eam may also exert a driving action in the 16' high pressure stage, or it may pass therethrough simply to absorb heat from the blades and other turbine parts exposed to the combustion gases. In the intermediate stage, both the explosion gases and the steam (both I coming from the high pressure stage) exert a driving action, and the steam again absorbs heat from the combustion gases by way of the turbine blades. It will thus be seen that in the high pressure stage and in the intermedi- 2 ate pressure stage, .the steam will exert a cooling action on the engine parts heated by the combustion gases. In the low pressure stage, I generally employ a single driving fluid, which is the steam exhausting from the 80 intermediate pressure stage.

combustion gases exhausting from one of the gas turbine stages is utilized to generate steam for the high pressure s age.

An arrangement suitable for carrying out my present invention is illustrated by the accompanying drawings, in which Fig. 1 is a somewhat diagrammatic general view,

with parts, in section, and Fig. 2a view through the intermedia e turbine between a steam nozzle and its associated catch nozzle.

Air and fuel are supplied under pressure at regular intervals to one or more explosion chambers 10. which, as shownin Fig. 1 of the drawings, are provided'with inlet valves at the right thereof for intermittently charging thereinto mixtures of such air. and fuel, as disclosed more fully in my United States Patent No. 877 ,194. After ignition has been effected in any suitable manner, the explosion gases are allowed (upon the opening of ap- The heat of the 1 Application filed October 2, 1926. Serial No. 139,173.

propriate valves 11) to pass tocombustion gas nozzles discharging jets against the blades 12 of a high pressure rotor 13. Against these blades is also discharged steam issuing from nozzles 14,'and after passing through the rotor 13, this steam is collected by catch nozzles 15. The pressure of this steam may be sufiicient to exert an auxiliary driving action on the high pressure rotor 13, or the steam may have for its sole function (so far as the high pressure stage is concerned) to absorb heat from this stage and cool it, particularly the rotor blades 12. In any event, however, the steam thus heated in the high pressure stage has a sufficient pressure to exert a driving action on the intermediate pressure turbine. to the steam nozzles 16 of which it passes from the catch nozzles 15 through a suitable conduit 17. The rotor 18 of the intermediate stage is driven by'the steam issuing from the nozzles 16 and also by the exhaust combustion gases issuing from nozzles 19 to which they are conveyed by a conduit 20 from the exhaust chamber 21 of the high pressure stage. From the intermediate pressure stage, the steam, collected by catch nozzles 22, passes through a pipe 23 to a low pressure steam turbine 24 and then to a condenser 25. The combustion gases exhausting from the intermediate pressure turbine pass through a pipe 26 to a casing 27 and then out to the atmosphere. In the casing 27 is arranged a boiler or container 28 for water from which steam is generated by the heat of the exhaust gases, such steam being then conveyed by a conduit 29 to the nozzles 14 of the high pressure stage.

It will be clear from the above that no separate furnace or source of heat is required for the generation of steam for cooling purposes, as I have found that the heat of the exhaust explosion gases suffices for this purpose.

Various changes in the specific forms shown and described may be made wi hin the scope of the claims without departing from the spirit of my invention.

I claim:

.1. A power plant comprising a plurality of explosion chambers adapted to be intermittently charged with an explosive mixture for explosion therein, a high pressure turbine having nozzles for high pressure steam and high" pressure combustion gases respectively, -sa1d gas nozzles being connected to said explosion chambers to receive therefrom intermittent j ets of explosion gases, means for colletting separately the steam and the explosion gasesexhausting from said explosion turbine, said gases exhausting at a pressure above atmospheric, a second turbine likewise having steam nozzles and combustion gas nozzles, such nozzles receiving their supply from the exhaust of the high, pressure turbine, the

gases exhausting from said second turbine at substantially atmospheric pressure, a steam boiler arranged in the path of the gases exs hausting from one of said turbines andheated exclusively by said gases, there beingno additional source of heat devoted to the generation of steam, and conduits for conveying the steam produced in said boiler to the steam nozzles ofsaid high pressure turbine, the ases exhausting from the second turbine hei steam from said high pressure turbine to the steam nozzle of the intermediate pressure turbine, the latter having separate outlets forexhaust steam and exhaust combustion gases respectively, a low pressure condensing tur-v bine receiving its motive steam from the steam outlet of said intermediate pressure multi-stage turbine, a steam boiler heated by the exhaust combustion gases from said intermediate pressure turbine, and having an outlet to discharge the said gases into the atmosphere, and a conduit for conveying the. steam generated in such boiler to the steam nozzle of the high pressure turbine.

In testimony whereof I' have hereunto set m hand..

y HANS 'HOLZWARTH.

ng ultimately discharged into the atmosphere without being caused. to perform additional mechanical work.

2. A power plant as set forth in claim 1 including a low pressure steam turbinereceiving its motive steam from the exhaust of the second-mentioned turbine.

3. A power plant comprising a high pressure turbine with'nozzlesfor high pressure steamand high pressure combustion gases respectively and means for collecting separately the exhaust steam and the exhaust combustion gases, an intermediate multi-stage turbine likewise having steam nozzles and combustion gas nozzles, such nozzles receiving their supply from the exhaust of the high pressure turbine, a low pressure condensing steam turbinereceivmg its motlve steam fromthe exhaust ofsaid intermediatemulti-stage turbine,

a nozzle for high pressure steam, another nozzle connected with said outlet to receive high pressure combustion gases from said explosion chamber Whenever said valve is open, and a rotor in operative relation to said nozzles; a collectorto receive the successive jets of combustiongasesissuing from said rotor,

an intermediate pressure multi-stage turbine having a steam nozzle and a combustion gas nozzle, a connection from said collector to the combustion gas nozzle of said intermediate turbine, another connection to convey exhaust

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