CA2068148A1 - Moisture separation in turbine interstage steam flow - Google Patents
Moisture separation in turbine interstage steam flowInfo
- Publication number
- CA2068148A1 CA2068148A1 CA 2068148 CA2068148A CA2068148A1 CA 2068148 A1 CA2068148 A1 CA 2068148A1 CA 2068148 CA2068148 CA 2068148 CA 2068148 A CA2068148 A CA 2068148A CA 2068148 A1 CA2068148 A1 CA 2068148A1
- Authority
- CA
- Canada
- Prior art keywords
- steam
- moisture
- flow
- housing
- high pressure
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/26—Steam-separating arrangements
- F22B37/32—Steam-separating arrangements using centrifugal force
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
- F01K7/223—Inter-stage moisture separation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Any moisture present in a steam flow outletting from a high pressure steam turbine and before that flow is passed to the inlet of a low pressure turbine, is removed by passing the flow through a high velocity separator, this separator being a type in which at entry thereto vanes cause vortex-like swirling of the steam flow so that moisture therein is centrifuged against an inner wall surface of a separator housing from thence being carried forward in flow direction to outlet from the housing via a skimmer slot in the housing wall located intermediate the housing ends. The steam flow from which the moisture has been separated, passes to an outlet end of the housing but before making its exit therefrom passes through straightening vanes which reorient the flow from vortex-like swirling to longitudinal straight line course thereof.
Any moisture present in a steam flow outletting from a high pressure steam turbine and before that flow is passed to the inlet of a low pressure turbine, is removed by passing the flow through a high velocity separator, this separator being a type in which at entry thereto vanes cause vortex-like swirling of the steam flow so that moisture therein is centrifuged against an inner wall surface of a separator housing from thence being carried forward in flow direction to outlet from the housing via a skimmer slot in the housing wall located intermediate the housing ends. The steam flow from which the moisture has been separated, passes to an outlet end of the housing but before making its exit therefrom passes through straightening vanes which reorient the flow from vortex-like swirling to longitudinal straight line course thereof.
Description
X
MOISTUR~ SEPARATION IN TURBIN~ lNTE~RSTAGI~ STEAM ~LOW
BACKGROUND OE7 TH~ ~ION
The presen~ in~rention relates to separation of moisture present in a steam flo~ e~hausted from a high pressure turbine unit to a low S pressure turbine unit and, more particularly~ to employmcnt of a high velocity moisture separator for that purpose in placc of heretofore used low veloci~r separation units which are of needlcss greatcr bu1tc and weight than the high Yelociq separators.
lt is known to remove any moisturc as may be present therein from the steam ~haust of a high pressure ste~m turbine before that steam is delivered to a low or intermediatc pressure steam turbine, this being done to pre~rent possibiliq of damage to the turbine blades from moisturc produced incident the estracting (as useful work drhing the turbine) of heat from dry high pressure steam. This moisture presence can be dealt with by passing the steam following outlct from the high pressure turbine and before it enters a lower pressure turbine unit, through a mechanical moisture scparator, e.g., a che~ron blade separator whcrein moisture removal lcvds of as much as about 97%
can be achie~red. Optionally, the thus-treated steam can be passed through one or more stages of a rehcat heat eschanger before inletting to a subsequent turbinc stagc.
The prior used moisture separators operate with ~rery low steam ~reloci~r and conscquently, the separator structure must be quite large.
Illustratnre of the last notcd point is the arrangement in a nuclear plant wherein for u~se with a SBWR reactor system, two moisture separators are used, these each bdng gene~ally cylindrical structures 11 feet in diameter and 60 fect long. Further, these structura are situated in the operating floor roquiring sigllificant floor space9 and additio~ally are 2 ~ 3 shielded in concrete so tha~ in-all, considerable lost space and need for special and reinforced structural mounting attends their employment in thc system.
A moisture separator type which handles separation with high S steam Yelocity is Icnown, such for e~ample, being used by Electricite De France in conjunction with moisturc removal from steam to prevent system component erosion and corrosion related steam flow through these components.
OBJ~CrS AND SUMMARY OF T~ INVI~NIION
Accordingly, it is an object of the invention to provide a steam turbine system with improved moisture separator means for removing moisture prescnt in a steam flow cshausting from a high pressure turbine uni~ and being passed to a lower pressurc turbine unit which overcomes the drawbacks of the prior art.
lS It is a fur~er object of the invention to provide a moisture separator mean~ of conside~ably smaller size and lesser weight than moisture separators used pre~riously for the samc purposc.
It is a still further objcct of the invention to pro~ride a moisture separator means particularly suited to use in a nuclcar systcm wherein because of smaller sizc and wcight than prior used separators, such can bc located outside the turbine unit operating space thus allovving for more economical space utilization within the operating space.
Briefly stated, there is provided moisture removal from a steam flow outletting a high pressure turbine and before it inlets a low pressure tur~ine, effected by passing thc flow through a high ~relocity moisture separator of a ~rpe wherein vanes at an entry location of the separ2tor cause vorte~-lilce swirling of the stream flo~v to produce centrifugal displacement of moisturc therefrom to impact a8ai~ a separator inner housing wall along whic~ it can carry to outlet from the housing at a skimmer slot formed in thc housing wall. The steam 2 ~
MOISTUR~ SEPARATION IN TURBIN~ lNTE~RSTAGI~ STEAM ~LOW
BACKGROUND OE7 TH~ ~ION
The presen~ in~rention relates to separation of moisture present in a steam flo~ e~hausted from a high pressure turbine unit to a low S pressure turbine unit and, more particularly~ to employmcnt of a high velocity moisture separator for that purpose in placc of heretofore used low veloci~r separation units which are of needlcss greatcr bu1tc and weight than the high Yelociq separators.
lt is known to remove any moisturc as may be present therein from the steam ~haust of a high pressure ste~m turbine before that steam is delivered to a low or intermediatc pressure steam turbine, this being done to pre~rent possibiliq of damage to the turbine blades from moisturc produced incident the estracting (as useful work drhing the turbine) of heat from dry high pressure steam. This moisture presence can be dealt with by passing the steam following outlct from the high pressure turbine and before it enters a lower pressure turbine unit, through a mechanical moisture scparator, e.g., a che~ron blade separator whcrein moisture removal lcvds of as much as about 97%
can be achie~red. Optionally, the thus-treated steam can be passed through one or more stages of a rehcat heat eschanger before inletting to a subsequent turbinc stagc.
The prior used moisture separators operate with ~rery low steam ~reloci~r and conscquently, the separator structure must be quite large.
Illustratnre of the last notcd point is the arrangement in a nuclear plant wherein for u~se with a SBWR reactor system, two moisture separators are used, these each bdng gene~ally cylindrical structures 11 feet in diameter and 60 fect long. Further, these structura are situated in the operating floor roquiring sigllificant floor space9 and additio~ally are 2 ~ 3 shielded in concrete so tha~ in-all, considerable lost space and need for special and reinforced structural mounting attends their employment in thc system.
A moisture separator type which handles separation with high S steam Yelocity is Icnown, such for e~ample, being used by Electricite De France in conjunction with moisturc removal from steam to prevent system component erosion and corrosion related steam flow through these components.
OBJ~CrS AND SUMMARY OF T~ INVI~NIION
Accordingly, it is an object of the invention to provide a steam turbine system with improved moisture separator means for removing moisture prescnt in a steam flow cshausting from a high pressure turbine uni~ and being passed to a lower pressurc turbine unit which overcomes the drawbacks of the prior art.
lS It is a fur~er object of the invention to provide a moisture separator mean~ of conside~ably smaller size and lesser weight than moisture separators used pre~riously for the samc purposc.
It is a still further objcct of the invention to pro~ride a moisture separator means particularly suited to use in a nuclcar systcm wherein because of smaller sizc and wcight than prior used separators, such can bc located outside the turbine unit operating space thus allovving for more economical space utilization within the operating space.
Briefly stated, there is provided moisture removal from a steam flow outletting a high pressure turbine and before it inlets a low pressure tur~ine, effected by passing thc flow through a high ~relocity moisture separator of a ~rpe wherein vanes at an entry location of the separ2tor cause vorte~-lilce swirling of the stream flo~v to produce centrifugal displacement of moisturc therefrom to impact a8ai~ a separator inner housing wall along whic~ it can carry to outlet from the housing at a skimmer slot formed in thc housing wall. The steam 2 ~
3 ~AT-05192 flow from which moisture has been separated before e~iting the housing passcs through straighter~ing vane~ which reorient t~ stcam flow to a longitudinal straight line flow cour~e.
In accordance with these and other objects of the invention, S therc is proYided in a steam twbine system includiIlg a high pressure stcam turbine having an inlet floev thereto of dry, high pressurc steam driYingly rotating a rotor of thc turbine the pressure of which stcam reduces during passage through the turbine so that at outlct from the high prcss~rc turbinc the steam is at low pressure, there being a low pressure turbine which receivcs this low prasurc steam for passagc thcrethrough for driving thc low pressure turbinc rotor to cstract further useful work from thc stcam, at least one moisture separator intenrening thc high pressurc turbine steam outlct and an inlet to the low pressure turbine9 the moisture scparator being operablc to remove substantially all of any mois~urc as may be pre~ent in steam flow bctween the high and low pressure turbilaes, thc separator being a ~pe that includes an elongated housing with an entry end and a discharge end, there being turning vanes prosimal the housing cntry end for vortesing an incoming straight line flow of moisturc-contuning steam to a swirling flow thercby to inducc caltrifugal force within the flow that displace~ the moisture radially of the flow course to impingcment with an inner wall surfac:e of the housing so that carry forward of the moisture wit~in the housing is along the inner wall surface to esit therefrom at a slci~nmer slot in the housing wall, other ~ranes being pro~rided near the skimmer slot and oriented to conYert thc substantial~r mois~ure-free steam flow to straight lille flow thorcof ~rom the separator discharge end.
According to othe~ features of thc invcntio~, at least one additional moisture separator can be embodied in line with thc first to e~ancc the e~tent to vrhich moisture scparation is achieved.
Additionally, the moisture sepa~ators will be such as to have a 2 ~
In accordance with these and other objects of the invention, S therc is proYided in a steam twbine system includiIlg a high pressure stcam turbine having an inlet floev thereto of dry, high pressurc steam driYingly rotating a rotor of thc turbine the pressure of which stcam reduces during passage through the turbine so that at outlct from the high prcss~rc turbinc the steam is at low pressure, there being a low pressure turbine which receivcs this low prasurc steam for passagc thcrethrough for driving thc low pressure turbinc rotor to cstract further useful work from thc stcam, at least one moisture separator intenrening thc high pressurc turbine steam outlct and an inlet to the low pressure turbine9 the moisture scparator being operablc to remove substantially all of any mois~urc as may be pre~ent in steam flow bctween the high and low pressure turbilaes, thc separator being a ~pe that includes an elongated housing with an entry end and a discharge end, there being turning vanes prosimal the housing cntry end for vortesing an incoming straight line flow of moisturc-contuning steam to a swirling flow thercby to inducc caltrifugal force within the flow that displace~ the moisture radially of the flow course to impingcment with an inner wall surfac:e of the housing so that carry forward of the moisture wit~in the housing is along the inner wall surface to esit therefrom at a slci~nmer slot in the housing wall, other ~ranes being pro~rided near the skimmer slot and oriented to conYert thc substantial~r mois~ure-free steam flow to straight lille flow thorcof ~rom the separator discharge end.
According to othe~ features of thc invcntio~, at least one additional moisture separator can be embodied in line with thc first to e~ancc the e~tent to vrhich moisture scparation is achieved.
Additionally, the moisture sepa~ators will be such as to have a 2 ~
lengtbhvidth ratio of about 2, and e~hibit buL~c and weight considerably les~ tha~ in prior uscd low velocity separators. In a generally cylindrically conffg~red separator, thc housing diameter can be about 6 feet9 and the len~h about 12 feet.
S The invention also provides methodology for passing an intcrstage steam flow through a housiIIg to induce a vorte~-like swirling flow therein to throw or impinge thc moisture against thc housing from thence to be calTied along such inner wall and e~it from thc housing, the now "d~y stesm being reoriented in its flow to straight line beforc lcaving the housing.
The above, and other objects, fcatures and advantage~ of thc prcscnt im~ention will become appare~ from thc following description rcad in conjunctio~ with the accompanying drawings, in which lilce referencc numcrals designatc the same clcmen~
BRIE~ DESCRII~ION O~ T~ DR~W~GS
~IGI TRE 1 is a fragmentary plan depiction of a prior art nuclcar system turbine unit operating space, showing an arrangsment of high and low prcssure hlrbinc unit8 ant the moisture separator~ used for separating moishlrc from thc stcam flowing as eshaust from the high prsurc turbine to the law pres~ure turbine.
FIGURE 2 is a fragment~ cnd elcvational ~iew corrcsponding to the showin~ gnren in ~E:IGUR~ 1 and illustrating the hGa~y concrete cnclowre~ ~hich must bc pro~rided in tbc operating space to house the moisture separators.
FIGURE 3 is a fragmentary elcvationsl vicw of a moisture separator instaLlation in a nuclc~r system pro~ided in accordlance with and for purpose~ as given by thc prese~t i~ ention.
FIGUR~ 4 is a plan schemadc depiction of shc ~sIGURE 3 installation, and FIGURE S is a longinld1nal half-section of one of the high 2 ~ 3 5 24-AT~5192 vdocity moishlre separators employed with the present in~ention, some parts being shown in full, the FIGURE depicting the manner in which the separator functions to remove moisture from steam.
DE~TAILE~D DESCRIPTION O~ THE PREPERRED
S E~lBODIM~NT
Ths present invention is described he~ein in connection with a separation of moisture from a steam flow in the turbine system of a steam boiling water reactor nuclear plant for which use it is particularly suited in that it allows considerablc weight reduction in respect of system moisture separators and hence, allows for gains in usdul space in the operating enclosure as well as reductions in foundation loadings.
The h~vention is howevor, also applicable to moisturc scparatio~ in any steam plant installation wherdn an interstage "wet steam" flow between higher and lower pressure twbines should be "dricd" by 1S having the moisture removed therefrom beforc it cnten thc lower pressure turbine.
FIGURES 1 and 2 depict prior moisturc scparado~ arrangements and components used in a SBWR. A high pressure turbi~e 10 and a low pressure turbine 12 aligned therewith are employed to estract heat energy from high pressure (1200 psig, for e~ample) steam generated in a SBWR and con~rert it to useful energy in the form, e. g., of electrical power produced by an electrical generator 13 which is dri~ingly couplod to the turbines in known manner.
Steam is supplied to the high pressure turbine 10 by mun 14, and gives up energy in tur~ine 10, the steam reducing in pressure and to the an e~ent that moisture can e~ist therein which moisture must be remo~ed from the steam after it outlets the high pressure turbine and beore it can enter the low pressure tu~bine where moisnlre if su~iciently largc, could damage the low prcssure rotor blades and the like.
2 ~ g In avoidlance of that e~ent and as the pAor art teaches, steam outlcttil~g tu~binc 10 is conveyed from a tur'oine outlet trunk 17 through lines 16, 18 to respective ones of t~o moisture separators 20, 22, these separators being relati~ely largc structures (about 11 feet S diamete~ by 60 feet long) wherein low velocity steam ~ow attends moisture scparation, the separators being chevron blade type separators.
The s~eam following moisture separation there~om, is con~reyed via lines 24 to the inlet trunk 19 of low pressur~ turbine 12.
The buL~ of the separators 20, 22 roquires that thcy be installed on the operating floor 26 where they occupy considerable space that 4therwise could be used for diffe~ent purposes. Further and because thcse devices are on thc operating floor, they mus~ be situatcd in hea~y concrete shielding structures 28. Relocating required moisture separators to an e~tra-operating floor space is an important advantagc of the in~rcntion as will be ~plained below.
Dealing now with details of the hncntion, it is notcd ~lrst and with reference to ~IGURE 5, that the moisture separator type 30 employed in effecting remo~ral of moisture from steam h a component heretofore uscd in France by Electricite de France. The separator 30 includcs an elongatcd generally cylindricslly configured housing 32 flared or of bell-shape at its respecthre entry and discharge ends 34, 36.
This flaring will be recehred in transition end pieces (not sho~) which join the separator to steam con~reying lines.
Withill the housing near or pro~imal the entry thereto, is a turning ~rsne assembly 38 comprised of a circle of ~anes 40 fi~ed to long hub 42, theso ~ranes being set such that sn incoming straight line flow of steam is caused to undergo flow course dcvistion in the form of a lrorte~-like or cyclonic swirling path around the hub 42.
Incident this changing geometry of the steam flow is the displacing or centrifugal tbrusting of any moisture in the stesm flow radially away from th~ steam flow main body and into impingement 2 ~
S The invention also provides methodology for passing an intcrstage steam flow through a housiIIg to induce a vorte~-like swirling flow therein to throw or impinge thc moisture against thc housing from thence to be calTied along such inner wall and e~it from thc housing, the now "d~y stesm being reoriented in its flow to straight line beforc lcaving the housing.
The above, and other objects, fcatures and advantage~ of thc prcscnt im~ention will become appare~ from thc following description rcad in conjunctio~ with the accompanying drawings, in which lilce referencc numcrals designatc the same clcmen~
BRIE~ DESCRII~ION O~ T~ DR~W~GS
~IGI TRE 1 is a fragmentary plan depiction of a prior art nuclcar system turbine unit operating space, showing an arrangsment of high and low prcssure hlrbinc unit8 ant the moisture separator~ used for separating moishlrc from thc stcam flowing as eshaust from the high prsurc turbine to the law pres~ure turbine.
FIGURE 2 is a fragment~ cnd elcvational ~iew corrcsponding to the showin~ gnren in ~E:IGUR~ 1 and illustrating the hGa~y concrete cnclowre~ ~hich must bc pro~rided in tbc operating space to house the moisture separators.
FIGURE 3 is a fragmentary elcvationsl vicw of a moisture separator instaLlation in a nuclc~r system pro~ided in accordlance with and for purpose~ as given by thc prese~t i~ ention.
FIGUR~ 4 is a plan schemadc depiction of shc ~sIGURE 3 installation, and FIGURE S is a longinld1nal half-section of one of the high 2 ~ 3 5 24-AT~5192 vdocity moishlre separators employed with the present in~ention, some parts being shown in full, the FIGURE depicting the manner in which the separator functions to remove moisture from steam.
DE~TAILE~D DESCRIPTION O~ THE PREPERRED
S E~lBODIM~NT
Ths present invention is described he~ein in connection with a separation of moisture from a steam flow in the turbine system of a steam boiling water reactor nuclear plant for which use it is particularly suited in that it allows considerablc weight reduction in respect of system moisture separators and hence, allows for gains in usdul space in the operating enclosure as well as reductions in foundation loadings.
The h~vention is howevor, also applicable to moisturc scparatio~ in any steam plant installation wherdn an interstage "wet steam" flow between higher and lower pressure twbines should be "dricd" by 1S having the moisture removed therefrom beforc it cnten thc lower pressure turbine.
FIGURES 1 and 2 depict prior moisturc scparado~ arrangements and components used in a SBWR. A high pressure turbi~e 10 and a low pressure turbine 12 aligned therewith are employed to estract heat energy from high pressure (1200 psig, for e~ample) steam generated in a SBWR and con~rert it to useful energy in the form, e. g., of electrical power produced by an electrical generator 13 which is dri~ingly couplod to the turbines in known manner.
Steam is supplied to the high pressure turbine 10 by mun 14, and gives up energy in tur~ine 10, the steam reducing in pressure and to the an e~ent that moisture can e~ist therein which moisture must be remo~ed from the steam after it outlets the high pressure turbine and beore it can enter the low pressure tu~bine where moisnlre if su~iciently largc, could damage the low prcssure rotor blades and the like.
2 ~ g In avoidlance of that e~ent and as the pAor art teaches, steam outlcttil~g tu~binc 10 is conveyed from a tur'oine outlet trunk 17 through lines 16, 18 to respective ones of t~o moisture separators 20, 22, these separators being relati~ely largc structures (about 11 feet S diamete~ by 60 feet long) wherein low velocity steam ~ow attends moisture scparation, the separators being chevron blade type separators.
The s~eam following moisture separation there~om, is con~reyed via lines 24 to the inlet trunk 19 of low pressur~ turbine 12.
The buL~ of the separators 20, 22 roquires that thcy be installed on the operating floor 26 where they occupy considerable space that 4therwise could be used for diffe~ent purposes. Further and because thcse devices are on thc operating floor, they mus~ be situatcd in hea~y concrete shielding structures 28. Relocating required moisture separators to an e~tra-operating floor space is an important advantagc of the in~rcntion as will be ~plained below.
Dealing now with details of the hncntion, it is notcd ~lrst and with reference to ~IGURE 5, that the moisture separator type 30 employed in effecting remo~ral of moisture from steam h a component heretofore uscd in France by Electricite de France. The separator 30 includcs an elongatcd generally cylindricslly configured housing 32 flared or of bell-shape at its respecthre entry and discharge ends 34, 36.
This flaring will be recehred in transition end pieces (not sho~) which join the separator to steam con~reying lines.
Withill the housing near or pro~imal the entry thereto, is a turning ~rsne assembly 38 comprised of a circle of ~anes 40 fi~ed to long hub 42, theso ~ranes being set such that sn incoming straight line flow of steam is caused to undergo flow course dcvistion in the form of a lrorte~-like or cyclonic swirling path around the hub 42.
Incident this changing geometry of the steam flow is the displacing or centrifugal tbrusting of any moisture in the stesm flow radially away from th~ steam flow main body and into impingement 2 ~
with the inner surface of the housing wall 44 whereat it is carried forward by flow momentum to a location dovvnstream of vane assembly whereat it can access a skimmer slot 46 formed in housing wall 44 by means of which separated moisture can remove from the housing and S be directed to a condensate recoYe}y function via line 33, there being a sle~e 35 encircling the separator to confine thc moisture outflow from the skimmer slot and direct it to thc line 33.
Located on hub 42 adjacent downstream of the slcimmer slot, is a second vane assembly 50 haYing a number of vanes 52 set in manner to convert or restore the swirling flow of the dry steam to a straight line or longitudinal flow in thc housing so it can it therefrom in that form and pass on to the low pressurc turbine.
With reference now to Figures 3 and 4, the further aspects of the invention will be given. As is readily seen from FIGURE 3, two separators 30a, 3~b arc associated with steam e~haust from one side of the high pressure turbine, and two additional ona 30c, 30d are associated with ~haust from an oppodte side of that turbine 10, these pairings and associated steam lines being symmetrically arrangcd on opposite sidcs of thc aligned a~es of the turbine units.
The use of four moisture separators is ea;emplary of the numbers of such separators as are cmployed to replace the two used in the FIGURES 1 and 2 depicted system. The high ~clocity separators 30 ha~re the ad~rantage of wcight and size reduction below wh~t is present in the separators 20,22 which is quite dgnificant. Illustrati~rc on this point is thc near~r eight-fold reduction of volume of structure for the high velocity separators in the FIGURES 3 and 4 systcm as compared to those of the FlGURES 1 and 2 system. Thus less space nced be used for the separators 30, th~ can be located below the operating floor as shown in FIGURE 3 eliminating shiclding enclosure Oll the operating floor, and less weight is involved with corresponding lightening of foundation loading and rcduc~iou in supportiDg structure 2~8 l~
Located on hub 42 adjacent downstream of the slcimmer slot, is a second vane assembly 50 haYing a number of vanes 52 set in manner to convert or restore the swirling flow of the dry steam to a straight line or longitudinal flow in thc housing so it can it therefrom in that form and pass on to the low pressurc turbine.
With reference now to Figures 3 and 4, the further aspects of the invention will be given. As is readily seen from FIGURE 3, two separators 30a, 3~b arc associated with steam e~haust from one side of the high pressure turbine, and two additional ona 30c, 30d are associated with ~haust from an oppodte side of that turbine 10, these pairings and associated steam lines being symmetrically arrangcd on opposite sidcs of thc aligned a~es of the turbine units.
The use of four moisture separators is ea;emplary of the numbers of such separators as are cmployed to replace the two used in the FIGURES 1 and 2 depicted system. The high ~clocity separators 30 ha~re the ad~rantage of wcight and size reduction below wh~t is present in the separators 20,22 which is quite dgnificant. Illustrati~rc on this point is thc near~r eight-fold reduction of volume of structure for the high velocity separators in the FIGURES 3 and 4 systcm as compared to those of the FlGURES 1 and 2 system. Thus less space nced be used for the separators 30, th~ can be located below the operating floor as shown in FIGURE 3 eliminating shiclding enclosure Oll the operating floor, and less weight is involved with corresponding lightening of foundation loading and rcduc~iou in supportiDg structure 2~8 l~
8 2~AT-05192 needed.
In a particularly advantageous embodiment, the separators 30 will ha~re a lengthtwidth ratio of about 2. The FIGUE~ES 3, 4 separators ha~re a diameter of 6 feet and a length of 12 feet.
S The FIGURES 3 and 4 arrangement is successful to effect removal of about 96% of the moisb~re contained in thç interstage steam flow outletting the high pressure turbinc.
Having described pre~erred cmbodiments of the invention with reerence to the accompa~ying dra~vings, it is to bc understood that the invendon is not limited to those prccise embodiments, and ehat ~rarious changes and modifications may be cffected thercin by one of ordinary skill in the art withou~ departing from thc scope or spirit of the in~rention as defmed in the appended claims.
In a particularly advantageous embodiment, the separators 30 will ha~re a lengthtwidth ratio of about 2. The FIGUE~ES 3, 4 separators ha~re a diameter of 6 feet and a length of 12 feet.
S The FIGURES 3 and 4 arrangement is successful to effect removal of about 96% of the moisb~re contained in thç interstage steam flow outletting the high pressure turbinc.
Having described pre~erred cmbodiments of the invention with reerence to the accompa~ying dra~vings, it is to bc understood that the invendon is not limited to those prccise embodiments, and ehat ~rarious changes and modifications may be cffected thercin by one of ordinary skill in the art withou~ departing from thc scope or spirit of the in~rention as defmed in the appended claims.
Claims (12)
1. In a steam turbine system including a high pressure steam turbine unit receiving an inlet flow thereto of dry, high pressure steam drivingly rotating a rotor of the high pressure steam turbine unit in its passage through said high pressure steam turbine unit, the pressure of the steam reducing during said passage so that at an outlet from the high pressure steam turbine unit, the steam is at a low pressure, a low pressure steam turbine unit receiving steam outletting the high pressure turbine unit and passing therethrough for drivingly rotating a low pressure unit rotor thereby extracting further useful work from the steam, at least one moisture separator intervening the high pressure unit outlet and an inlet to the low pressure unit, said moisture separator being operable to remove substantially all of any moisture as may be present in a high velocity interstage steam flow between the high pressure and low pressure units, said moisture separator being of the type that includes an elongated housing with an entry end and a discharge end, there being turning vanes proximal the housing entrance end for vortexing an incoming straight line flow of moisture-containing steam to a swirling flow thereby to induce centrifugal force within the flow that displaces the moisture therein radially of a flow course axis to impingement with an inner wall surface of the housing so that carry forward of the moisture within the housing is along the inner wall surface to exit therefrom at a skimmer slot in the housing wall, and other vanes proximal the skimmer slot and oriented such to convert the substantially moisture-free steam flow to a straight line flow thereof from the separator discharge end.
2. The steam turbine system of claim 1 in which the moisture separator. is in a steam leg connecting an outlet trunck of the high pressure unit with an inlet trunk of the low pressure unit.
3. The steam turbine system of claim 2 comprising an additional like moisture separator in said steam leg.
4. The steam turbine system of claim 3 in which the first-mentioned and additional separators are disposed in a space below an operating floor on which the high and low pressure units are located.
5. The steam turbine system of claim 4 comprising a second steam leg connecting the high pressure unit outlet trunk with the inlet trunk of the low pressure unit, there being first and additional moisture separators in said second steam leg.
6. The steam turbine system of claim 5 in which the moisture separators in said second leg are disposed in said space below said operating floor.
7. The steam turbine system of claim 6 in which said first and second steam legs traverse courses symmetrically disposed on opposite sides of a longitudinal axis of said high pressure unit and have initial course ends at opposite sides of the high pressure unit outlet trunk, with the courses terminating at correspondingly opposite sides of the low pressure unit inlet trunk.
8. The steam turbine system of claim 1 in which the housing has a length/width ratio of about 2.
9. The steam turbine system of claim 8 in which the housing is cylindrically configrued and has a diameter of substantially 6 feet.
10. The steam turbine system of claim 1 in which the moisture separator is operable to remove up to at least about 96% of any moisture present in the steam flowed therethrough.
11. In the conveyance of a moisture-containing flow of steam outletting a higher pressure turbine and destined for inlet to a lower pressure turbine, the step of drying the steam to remove substantially all of any moisture present in said flow by inducing a vortex-like swirling in the flow while it is confined in an elongated housing to cause centrifugal displacement of moisture in the steam radially outwardly relative of a flow direction thereof so that it impinges an inner wall surface of the housing and is carried forwardly therealong to exit from the housing via a skimmer slot therein, and reorienting the swirling flow of the steam to a straight line one before the steam exits the housing.
12. The invention as defined in any of the preceding claims including any further features of novelty disclosed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71940391A | 1991-06-24 | 1991-06-24 | |
| US719,403 | 1991-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2068148A1 true CA2068148A1 (en) | 1992-12-25 |
Family
ID=24889934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2068148 Abandoned CA2068148A1 (en) | 1991-06-24 | 1992-05-07 | Moisture separation in turbine interstage steam flow |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0520711A1 (en) |
| JP (1) | JPH05187205A (en) |
| CA (1) | CA2068148A1 (en) |
| TW (1) | TW199935B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725125A (en) * | 2017-12-06 | 2018-02-23 | 中国船舶重工集团公司第七0三研究所 | A kind of drawing-in type of high-power saturation steam turbine strengthens dehumidification structure |
| US11097214B2 (en) | 2016-08-09 | 2021-08-24 | Rodney Allan Bratton | In-line swirl vortex separator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005199158A (en) * | 2004-01-15 | 2005-07-28 | Tlv Co Ltd | Gas-liquid separator |
| JP4636906B2 (en) * | 2004-03-18 | 2011-02-23 | 日立Ｇｅニュークリア・エナジー株式会社 | Nuclear power generation system |
| DE102009050087B4 (en) * | 2009-10-20 | 2011-12-22 | Areva Np Gmbh | Cyclone separator for the phase separation of a multiphase fluid flow, steam turbine plant with a cyclone separator and associated operating method |
| US9291062B2 (en) | 2012-09-07 | 2016-03-22 | General Electric Company | Methods of forming blades and method for rendering a blade resistant to erosion |
| US9874230B2 (en) * | 2014-04-15 | 2018-01-23 | Dresser-Rand Company | Gas takeoff isolation system |
| JP6081543B1 (en) * | 2015-08-19 | 2017-02-15 | 三菱日立パワーシステムズ株式会社 | Steam turbine plant |
| EP3133255B1 (en) * | 2015-08-20 | 2023-04-26 | General Electric Technology GmbH | Combined cycle power plant |
| CN111065213B (en) * | 2019-12-03 | 2022-05-17 | 福建闽威科技股份有限公司 | Circuit board processing is with moving back membrane structure convenient to user moves back membrane |
| CN111495040B (en) * | 2020-04-30 | 2021-03-16 | 西安交通大学 | Horizontal pipeline type gas-liquid separation device and method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1912805B2 (en) * | 1969-03-08 | 1971-12-02 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | DEVICE FOR WATER SEPARATION IN OVERFLOW PIPES OF STEAM TURBINES |
| DE2312725A1 (en) * | 1973-03-14 | 1974-09-26 | Kraftwerk Union Ag | Satd. steam turbine interstage moisture separator and heaters - for PWR and BWR power plants inhibiting line erosion |
| JPS5773808A (en) * | 1980-10-24 | 1982-05-08 | Toshiba Corp | Steam drain discharging device |
| FR2553296B1 (en) * | 1983-10-13 | 1988-10-07 | Stein Industrie | SEPARATOR OF A MIXTURE OF A VAPOR AND A LIQUID BY CENTRIFUGATION |
| FR2558741B1 (en) * | 1984-01-31 | 1991-03-22 | Electricite De France | CENTRIFUGATION MIXTURE SEPARATOR |
| FR2644084B1 (en) * | 1984-01-31 | 1991-08-16 | Electricite De France | CENTRIFUGATION MIXTURE SEPARATOR |
| JPS63140804A (en) * | 1986-12-02 | 1988-06-13 | Hitachi Ltd | Turbine generating installation of evaporated water type atomic power plant |
| JPS63235605A (en) * | 1987-03-24 | 1988-09-30 | Toshiba Corp | Turbine building |
| FR2630027B1 (en) * | 1988-04-19 | 1991-07-12 | Stein Industrie | CENTRIFUGATION MIXTURE SEPARATOR |
| FI884183A (en) * | 1988-09-23 | 1990-03-13 | Podolsky Mashinostroitelny Zavod Imeni Ordzhonikidze | A centrifugal separator. |
| FR2641574B1 (en) * | 1989-01-06 | 1991-03-22 | Stein Industrie | METHOD AND DEVICE FOR PROTECTING AGAINST CORROSION OF VAPOR TRANSPORT CONDUITS FROM THE HIGH-PRESSURE STAGE OF A TURBINE |
-
1992
- 1992-01-14 TW TW81100197A patent/TW199935B/zh active
- 1992-05-07 CA CA 2068148 patent/CA2068148A1/en not_active Abandoned
- 1992-06-22 JP JP16155292A patent/JPH05187205A/en active Pending
- 1992-06-22 EP EP92305684A patent/EP0520711A1/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11097214B2 (en) | 2016-08-09 | 2021-08-24 | Rodney Allan Bratton | In-line swirl vortex separator |
| CN107725125A (en) * | 2017-12-06 | 2018-02-23 | 中国船舶重工集团公司第七0三研究所 | A kind of drawing-in type of high-power saturation steam turbine strengthens dehumidification structure |
| CN107725125B (en) * | 2017-12-06 | 2023-12-08 | 中国船舶重工集团公司第七0三研究所 | Suction type reinforced dehumidification structure of high-power saturated steam turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| TW199935B (en) | 1993-02-11 |
| JPH05187205A (en) | 1993-07-27 |
| EP0520711A1 (en) | 1992-12-30 |
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