Gland steam sealing system for steam turbine youtube. Gland steam condenser lubrication oil tanks hydraulic oil tanks 1. Pdf gland steam condenser 12 april daily notes of mr. The best way to convert steam s potential energy into electricity is with a steam turbine. In steam turbines low pressure turbine lpt directly connected to condenser and condenser work under vacuum so its natural that air can ingress into condenser from shaft casing interface. The reutilization of this steam is carried over by the enhanced gland steam system. Also, in actual cogeneration process, it is observed from the gland leak steam condensate of 8. Labyrinth packing an overview sciencedirect topics. The turbine gland steam condenser is a heat exchanger that uses a partial flow of the condensate system through tubes to condense steam drawn from the steam turbines shaft seals. To prevent rust and loss of efficiency from steam leakage a gland steam condenser package is incorporated into the power plant. In a steam condenser of a type in which a plurality of tubes are arranged in a plurality of generally parallel rows, extending between and communicating with a steam inlet header and a condensate outlet header.
Prior to supplying steam to the turbine, the steam supply pipelines have to be drained and heated up. Our gland steam condenser packages come in almost every possible configuration, allowing us to supply complete systems to major steam turbine oems around the world. To drain out the condensate producing due to cooling of the gland steam drain. An introduction to condensers and auxiliary equipment for steam. Condenses the exhaust steam rejects the latent heat at the lowest practical temperature condenses under vacuum by creating vacuum, the condenser increases the efficiency of the turbine the condenser also performs some other important functions.
I would be thankful for youer experience and feed back on the proposals. Deaeration and reheat requirements for the steam condensate. The leakage steam which has been used for the gland sealing operation flows through the pipe 21 for gland leakage steam, and meets the steam in the pipe 20 for highpressure gland leakage steam, the resultant steam being supplied to the steam condenser 16 through the gland leakage steam pipe 22. Lockup and wear of the coupling, due to centrifuging of the lubrication causing premature failure. Although gas turbine power plants are becoming more popular, the most common means of producing electrical power remains the steam turbine. Thus, referring to fig 1 and presuming that 85f cooling water is supplied to the system from the cooling towers, water temperature into the steam condenser is approximately 95f. This system, commonly called a hybrid system, is very cost effective. The design of the transition piece to achieve the most uniform distribution of incoming steam over the tube bundle shell design parameters that provide maximum support to the tube bundle without impacting pressure drop. Pdf trouble shooting in turbine journal bearing vibration.
While maneuvering out of port, you answer a stop bell. We use this term to describe a small heat exchanger that is used to condense the steam that leaks past the first section of seals on the shaft of a steam turbine. Our gland steam condenser packages pull a slight vacuum on the turbine shaft seals by means of vacuum pumps, centrifugal blowers, or steam ejectors. Condensate produced by the gland steam condenser is routed to the condenser through a steam trap. Vacuum removal of the gland steam leakage is usually necessary with labyrinth glands. Nov 08, 2008 maw30ac010 gland steam condenser x x siemens 10 t 150000 1292 j6 max 1 oat01 0 air vent filter x x siemens 11 t1882401855 j2 max10bb010 oil tank x x siemens 12 t1882401855 l1 max21ap110 oil pump control oil x x siemens t1882401855 j3 x x siemens max22ap110 ol i pump control oil t1882401855 14 j5 n o c. This line also drains condensate that accumulates in the event of a tube leak in the gland steam condenser. You notice a lot of steam coming out of the gland exhaust condenser vent, in addition to the main condenser hotwell. Condenser the gland steam condenser receives steam and noncondensable gases from the tgss and condenses the steam.
Consult api schmidtbretten, api heat transfer groups gland steam condenser brochure on directindustry. View pdf catalogues and other online documentation prices are pretax. How does the steam turbine gland sealing system work. To prevent rust and loss of efficiency, a gland steam condenser package is incorporated into the power plant.
Assuming a turbine steam rate of 1416 lb per hr per. Enter the email address you signed up with and well email you a reset link. To prevent air from entering into the turbine casing, sealing steam is led to the turbine glands. Since the exhaust steam is led to the vacuum condenser, the coupling end gland creates a vacuum. Cumulative steam mass flow rate lost through both labyrinth seals.
Specifically, if the turbine exhausts into a vacuum system, it is necessary to injec. Turbine gland steam system the turbine gland steam system tgss provides steam to the turbine glands and the turbine valve stems. In case of jet condensers, dissolved air with the injection water enters into the condenser. Re utilization of gland steam for optimized efficiency in.
Our gland steam condenser packages come in almost every possible. Upto approximately 40% load steam from auxiliary source crhaux. Unique steam turbine for kizildere geothermal power plant. It is distributed longitudinally over the tubes through the space designated as dome area. The thermal energy is transformed to the kinetic energy as steam of high pressurehigh temperature rotates steam turbine. The tgss prevents leakage of air into or radioactive steam out of the turbine shaft and turbine valves. The condensed steam from the return line will be vented out using gland steam condenser fan control schemes. This condensing effect is a rapid change in state from a gas to a liquid. Changes in the pressure profile affectthe pressure and temperature of the available extraction steam and hence the reedheatlngsystem per. Nov 19, 2016 gland at the front end is called front gland and rear is called the rear gland. Under these conditions, steam for sealing must be provided at all sealing locations. The lowest pressure leakoff in the system is at the gland steam condensers, which are maintained at pressures marginally above the condenser. Excess pressure excess gland seal also has to be removed and put into the gland steam condenser. Epr final safety analysis report tier 2 revision 2 page 10.
Operation tubine operation et 08 443 after establishing the gland sealing, the condenser vacuum will improve at a faster rate when vacuum buildsup to 0. One overflow line is given to maintain the gland steam pr within limit 40 kpa, one desuperheating station is used to maintain the temp of gland steam at 120 deg c. The other two reasons why you should know the effect ofturbine load on the steam pressure proftle along the turbine are. Simultaneously, gland steam system is started to prevent air inleakage. Typically, the steam end and exhaust end gland boxes each carry four to five carbon rings, though some may have more. The function of gland steam condenser is to maintain a sub atmospheric pressure at the outmost leak off belt of the glands and thereby prevent leakage of steam to. The gland steam co ndenser is integrated into the condensate system with condensate passing through the tubing. Grt steam turbines alstom pdf catalogs documentation. It is attached to the air extraction pump and condensation extraction pump. Exergy analysis of marine steam turbine labyrinth gland seals. The gland condenser uses cooling water to condense this steam to water which is usually lost to sewer.
The condensed steam flows into the condensate receiver tank and the noncondensable gases are vented to the atmosphere. Speed control system turbine gland seal the turbine glands. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. The sealing steam first passes through the throttle steam valve and then the safety orifice in order to reduce its pressure to 0. Gland sealing in general purpose steam turbines processing. Operating on a continuous basis, api heat transfers gland steam condenser package pulls a slight vacuum on the turbine shaft seals by means of vacuum pumps, centrifugal blowers, or steam ejectors. The steam seal leakoff is maintained at a pressure above the main condenser and is vented to the intercondenser. A carbon ring has three segments held together with a garter spring.
Retrofit of a steam turbine with dry gas seals james r. Reduced bearing oil contamination due to steam leakage, thus decreasing the potential for bearing failure and downtime. In case of turbines with cooling water preheating and lowpressure lp. The glands condenser is a useful bit of kit that prevents steam escaping to atmosphere from the hp end of the turbine, and loss of vacuum from the lp end. Condenser the straight down flow type of sur face condenser is the development of our earlier design of simply applied ele mentary principles. Pdf on apr 3, 2018, mohd parvez published steam condenser find, read and cite all the research you need on researchgate. Eliminated the need for gland condensers, steam extraction and associated piping, reducing maintenance costs. Gland steam condenser condensate purification system reactor vessel condenser. Condenser the main purposes of the condenser are to condense the exhaust steam from the turbine for reuse in the cycle and to maximize turbine efficiency by maintaining proper vacuum. As the lowpressure steam comes in contact with the cooling water, it condenses and turns into water. Inter condenser of ges inter condenser of ges proceedings, proceedings. Once collected, the steam is separated from the air and condensed in a shell and tube condenser.
The air leaks into the condenser, through various joints, due to high vacuum pressure in the condenser. Chapter 9 major balanceofplant features 93 main condenser the main condenser is a multipressure threeshell type deaerating type condenser. Merchant marine exam first assistant engineer illustrations. Presentation outline condensate condensate system cep low pressure heaters deaerator function da parts. Turbine gland steam condenser valve control theory. Unique steam turbine for kizildere geothermal power plant in. Gland steam must have appropriate temperature and pressure which must be controlled during startup. As the lrvp is located directly below the condenser, this application eliminates a second shellandtube intercondenser, possibly a shell and tube aftercondenser, and two additional steam jet ejectors, realiz. What is condensate the steam after condensing in the condenser known as condensate, is extracted out of the condenser hot well by condensate pump and taken to the deaerator through ejectors, gland steam cooler and series of lp heaters. You notice a lot of steam coming out of the gland exhaust condenser vent, in addition to the main condenser hotwell level being low. Many translated example sentences containing gland steam condenser spanishenglish dictionary and search engine for spanish translations. Cutoff the starting ejector by closing air valve and then steam valve.
Us4793141a gland sealing steam supply system for steam. Reduced steam leakage by 95 percent, improving efficiency of the turbine. Api heat transfer has designed and manufactured a wide variety of gland steam condenser packages in almost every possible. Although the governor end gland is usually under positive. Steam sterilisable freeze drying equipment with a condenser capacity exceeding. The gland steam condenser is part of the condensate system that passes condensate through the tubing. Gland condenser is used to collect condensate and calories of steam that used for sealing steam turbine, and it also creates a state of vacuum to help discharge of steam. This results in a gland steam system that utilizes a pre condenser with a singlestage ejector, typically using condensate as the cooling medium. Gland steam condenser api schmidtbretten, api heat. The steam condenser receives exhaust steam from one end and gets in contact with the cooling water flowed within it form the cooling tower. Steam enters the condenser shell through the steam inlet connection usually located at the top of the condenser. Steam turbine complete generator with terminal box and exciter inlet stop valve lube oil system gland steam condenser turbine control panel with woodward 505 governor generator control panel with generator breaker condensate extraction pumps with motor cooling water pumps with motor. Gland steam condenser chimney steam condenser deaerator cv3 cv4 sv2 cv1 icv icv isv isv cv2 sv1 boiler superheater boiler reheater condensate pump condenser boiler feedwater pump drip pmp x2 x2 x2 x3 x2 cooling water cooling water out deaerator from hp leak steam from gland steam from chimney steam to cond.
Any literature on large condensing steam turbines should include information about the gland steam condenser system. Conventional gland sealing in general purpose steam turbines is accomplished with carbon rings. When the steam contacts the relatively cold tubes, it condenses. Gland seal the floating type labyrinth packing is fitted to seal the. And one of the best ways to improve efficiency and prevent rust is by implementing a gland steam condenser package.
Prices are indicative only and may vary by country, with. Turbine gland steam condenser valve control theory free. As the operating pressure of the condenser is lowered vacuum is increased, the enthalpy drop of the expanding steam in the turbine will also increase. The gland steam condenser collects air and steam mixture, condenses the steam, and discharges the air leakage. A steam powered eductor draws a vacuum and expels the noncondensables that are drawn down with the steam to the gland condenser. Gland steam condensers are essential for improved efficiency in steam turbine systems. Steam separators once through systems boiler blowdown tanks flash surge tanks condenser hotwell condensate storage deaerator 1.
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