WO2003018963A1 - Procedure for treating the gas flow, operating in the final part of the steam turbines and the equipment for performing this procedure - Google Patents
Procedure for treating the gas flow, operating in the final part of the steam turbines and the equipment for performing this procedure Download PDFInfo
- Publication number
- WO2003018963A1 WO2003018963A1 PCT/RO2002/000014 RO0200014W WO03018963A1 WO 2003018963 A1 WO2003018963 A1 WO 2003018963A1 RO 0200014 W RO0200014 W RO 0200014W WO 03018963 A1 WO03018963 A1 WO 03018963A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steam
- turbine
- condenser
- air
- flow
- Prior art date
Links
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
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/05—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles
- F02C7/052—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles with dust-separation devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
- F01K9/02—Arrangements or modifications of condensate or air pumps
-
- 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
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/08—Heating air supply before combustion, e.g. by exhaust gases
- F02C7/10—Heating air supply before combustion, e.g. by exhaust gases by means of regenerative heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
- F28B9/06—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid with provision for re-cooling the cooling water or other cooling liquid
Definitions
- the invention is referring to a procedure of treating the gas flow, operating in the final part, the last two or three stages of condensation steam turbines, and the equipment performing this procedure, for turbines used in thermo-power plants and nuclear power plants.
- the final axial flow section becomes very large and restrictive for the turbine power, due to the length of the final rotor blades, which are built at the edge of the admissible resistance to the strains they are undergoing, especially the centrifugal force.
- the rotor blades especially the final ones, with high peripherical speeds, undergo a certain errosion process with very severe consequencies, due to the humidity produced in the steam by distension below the saturation limit curve, the intensity of the errosion process increasing proportionnaly with steam pressure decrease.
- a separation phase of collecting the humidity out of the steam at the stage periphery, through natural centrifugation of drops, which occurs when the steam flows through the turbine stages or/and through humidity collection, deposed in a film layer, through special channels practiced in the statoric blades.
- the disadvantage of this procedure consists in the folio wings:
- the equipment aimed to distend the whole steam flow-rate received from the previous, intermediate pressure turbine part, up to the final pressure in the condenser, built up by one or several double-flow low-pressure turbine parts, having as main element the turbine stages coupled on the same shaft line and providing the steam into a condenser having collecting channels, through which is extracted directly an air-steam mixture from the final condensation zone, being further compressed outside, in a compression equipment; at the same time, in the zone of the stages operating with wet steam, there are used constructive solution consisting in collecting torroidal statoric chambers at stage periphery and/or slits in the statoric blades, by which is extracted and suctionned up the deposed water film.
- the technical problem solved by the present invention consists in the direct atenuation, as well as through a sinergical effect, of the technical conditions usually occurring at the realisation of the final part, the last 2 or 3 stages respectively, of steam turbines, by transferring a part of the flow-rate, about 40 ⁇ 60%, preferably 50%,in order to make constructively identical the flow- parts which follow, upstream the final part, in a secondary turbine, with the final part producing more power by the decreased pressure in the condenser, which is performed increasing the effectiveness of the air extraction thereof, as well as by reducing the humidity of the air passing through the final part, especially the last stage, which reduces the effect of braking and errosion of the drops upon the rotoric blades.
- the procedure used in this invention reduces the disadvantages presented above, by reducing the antagonistical constraints which occur at steam flowing through the final part of the low pressure parts of steam turbines, by the introduction of a new phase, i.e.:
- the equipment as per the invention reduces the above mentioned disadvantages by the fact that it reduces even to the half, the number of flows, respectively of low pressure parts of the main turbine, by transferring of a part, preferably one half, from the last 2 or 3 stages, into another shaft line, belonging to the boiler feed-water supply turbopump; at the same time it contains additionnally a humidity separator assembly, placed in the turbine final part, made of several distinct and successive, cavil type stages for mechanical, inertial separation, which increase considerably the length of the collecting channels, as well as the film layer
- Fig.1 Equipment for treating the steam flow through the final part of a steam turbine.
- Fig.2 Location of the humidity separator assembly in the final part of the steam turbine.
- Fig.3 Humidity separator equipment, outspread cylindrical section.
- Fig.4 The assembly separating the steam out of the air-steam mixture extracted from the condenser.
- the procedure as per the invention consists, in the first phase, in introducing the steam flow into the low-pressure part and distending it in successive stages up to the upstream of the last two or three stages where, as new phase, one part of the steam flow-rate is taken over,preferably 50%, which are transferred outside, where, in the next phase, it is distended in a secondary turbine, which is driving the shaft-line of the boiler feed water supply pump and a secondary electric generator which closes up the powers balance, at the same time with the distension phase of the steam flow-rate remained in the main turbine downstreams of the taking- over point; in parallel to this phase, there is introduced a new separation phase for the humidity of the whole steam flow passing through the turbine, by introducing a humidity separating equipment, in the zone where its humidity is of about 5 ⁇ 9%, which takes all the axial flow
- the pressure reduction in the condenser by introducing a reduction phase of the steam amount in the extracted air-steam mixture, which increases the efficiency of the air extraction from the condenser, results in the negative effects of corrosion increase and the increase of turbine flows number and, consequently the turbine length increase, these effects being balanced by the efficiency increase of the humidity separation and transferring of some flows from the main turbine to the secondary turbine.
- the separation efficiency increase by placing a water drops separator of the whole steam flow which is passing through the turbine final part results in the negative effect of turbine lengthenning, this effect being balanced by mounting of some flows to the secondary turbine, as well as an additional pressure loss at the steam flow through the separator, which is balanced by the pressure drop in the condenser.
- the transfer of a part of the steam flow to the secondary turbine 40 ⁇ 60%, preferably 50%, leads to a pressure loss in the connection pipes, thus a decrease of the turbine power, which is balanced by the efficiency increase of the separation and by the pressure drops in the condenser.
- the equipment as per the invention, formed by low pressure turbine part or parts Number 1, which drive the main electric generator Number 2, and the steam is drained into the condenser 3, having upstreams of the last two or three final stages an extraction port 4, dimensionnedHbr-the ⁇ taken-over steam flow-rate, preferably 50%, by which is supplied the double-flow secondary turbine 5, coupled with the secondary generator 6 and with the boiler feed water supply pump 7 and the booster pump 8, intermediated by the multiplier 9 with speed variation and respectively the demultiplier 10, the speed admission into the secondary turbine being controlled by the valve 11, and in the most rational case of the taking-over, of 50% , there results the constructive identity between the final part, the last two or three stages of the turbines and of the main turbine condenser, with the condenser 12 of the secondary turbine; the separator assembly A as per the invention, placed upstreams the final stage 13 and fixed dismountably on its statoric diaphraggm, of the main turbine 1 and similary in the secondary turbine 5, passed through by the whole steam flow of the
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ROA200100953A RO119902B1 (en) | 2001-08-24 | 2001-08-24 | Process and installation for separating steam from air-steam mixture, extracted from turbine condenser |
ROA200100955A RO120092B1 (en) | 2001-08-24 | 2001-08-24 | Process and apparatus for separating humidity in steam turbines |
ROA2001-00953 | 2001-08-24 | ||
ROA2001-00955 | 2001-08-24 | ||
ROA2001-01211 | 2001-11-07 | ||
ROA200101211A RO119964B1 (en) | 2001-11-07 | 2001-11-07 | Process for connecting steam turbines in series and installation for applying the same |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003018963A1 true WO2003018963A1 (en) | 2003-03-06 |
WO2003018963A9 WO2003018963A9 (en) | 2003-08-07 |
Family
ID=27354114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RO2002/000014 WO2003018963A1 (en) | 2001-08-24 | 2002-05-31 | Procedure for treating the gas flow, operating in the final part of the steam turbines and the equipment for performing this procedure |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2003018963A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104989469A (en) * | 2015-06-11 | 2015-10-21 | 江苏永钢集团有限公司 | Stagnant water discharging device used for air exhaust pipeline of condenser |
CN105065069A (en) * | 2015-08-14 | 2015-11-18 | 江苏永钢集团有限公司 | Condensed water extracting device of turbine generator set |
CN114622959A (en) * | 2020-12-10 | 2022-06-14 | 上海电气电站设备有限公司 | Operation control method for steam turbine cylinder cutting heat supply reconstruction |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3788066A (en) * | 1970-05-05 | 1974-01-29 | Brayton Cycle Improvement Ass | Refrigerated intake brayton cycle system |
GB1397435A (en) * | 1972-08-25 | 1975-06-11 | Hull F R | Regenerative vapour power plant |
US4571935A (en) * | 1978-10-26 | 1986-02-25 | Rice Ivan G | Process for steam cooling a power turbine |
-
2002
- 2002-05-31 WO PCT/RO2002/000014 patent/WO2003018963A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3788066A (en) * | 1970-05-05 | 1974-01-29 | Brayton Cycle Improvement Ass | Refrigerated intake brayton cycle system |
GB1397435A (en) * | 1972-08-25 | 1975-06-11 | Hull F R | Regenerative vapour power plant |
US4571935A (en) * | 1978-10-26 | 1986-02-25 | Rice Ivan G | Process for steam cooling a power turbine |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104989469A (en) * | 2015-06-11 | 2015-10-21 | 江苏永钢集团有限公司 | Stagnant water discharging device used for air exhaust pipeline of condenser |
CN105065069A (en) * | 2015-08-14 | 2015-11-18 | 江苏永钢集团有限公司 | Condensed water extracting device of turbine generator set |
CN114622959A (en) * | 2020-12-10 | 2022-06-14 | 上海电气电站设备有限公司 | Operation control method for steam turbine cylinder cutting heat supply reconstruction |
CN114622959B (en) * | 2020-12-10 | 2024-03-19 | 上海电气电站设备有限公司 | Operation control method during steam turbine cylinder cutting heat supply transformation |
Also Published As
Publication number | Publication date |
---|---|
WO2003018963A9 (en) | 2003-08-07 |
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