Method of condenser mounting

FIELD: power engineering; steam turbines.

SUBSTANCE: invention can be used at mounting of heavy-weight condensers of steam turbines connected with several exhaust ports of steam turbine low-pressure cylinders. Invention can be used also at servicing and subsequent adjusting of steam turbines especially, high-power ones. Invention improves reliability and increases economy of turbine in operation owing to decreasing excess loads on exhaust parts of low-pressure cylinders and support foundation plates of exhaust parts from side of condenser, decreasing friction forces along support surfaces of low-pressure cylinders, deformation of supports, formation of cracks and increasing vibration stability of turboset at different loads and modes of operation. According to proposed method of mounting of steam turbine condenser connected with several exhaust ports of low-pressure cylinders including assembling, preliminary truing, welding of connecting branch pipes and fixing in space by means of calibrated setting strips under springs. After operation of turboset under load, position of condenser in space is corrected to reduce load on support belt of low-pressure cylinders by disconnecting exhaust branch pipes of turbine and condenser, filling condenser with water of designed mass, placing inserts between upper and lower branch pipes of designed mass, placing inserts between upper and lower branch pipes and subsequent connection of branch pipes of turbine and condenser. Disconnected condenser is filled with water whose mass corresponds to designed load ΔG taken from low-pressure cylinder which is determined by value of compression Δh of spring unit under each support of condenser, basing on its rigidity characteristic K. ΔG removed from low-pressure cylinder is =ΣΔh x K. Estimation of loads on support belt of low-pressure cylinders in process of complex tests is carried out by displacement pickups checking compression of spring under all supports of condenser, and grade pickups on built-in supports of low-pressure cylinders operating at continuous monitoring by means of processor-based devices.

EFFECT: improved reliability end economy of turbine.

2 cl, 2 dwg

 

The invention relates to the field of power engineering and can be used when installing heavy steam turbine condensers having connection with several exhaust cylinder low-pressure steam turbines. The invention relates also to the use and subsequent commissioning of steam turbines, in particular high power.

The most famous steam turbine units, including units cylinder low-pressure (low-pressure) to the condenser, by the nature of the connection between them can be divided into two main types, let's call them a and B.

Type A.

Steam turbine, in which the module housing has a supporting belt for bearing on the Foundation of the turbine hall, and a condenser with a spring bearings for mounting on the Foundation of the basement under the module.

However, the exhaust lad LPT and neck of the capacitor (C1) is rigid connection welded connection.

In this case, is provided by thermal expansion of the module, the load of the vacuum (the difference between atmospheric pressure and vacuum module) partially balanced (according to the law of pressures and squares) from the condenser, while the portion of the unbalanced load from the vacuum on the supporting belt is saved (from disturbed areas in the region of the built-in supports module).

The main drawback in this design is one is by the appearance of additional load module from the completed capacitor, which is entirely transmitted to the supporting belt module.

Partly this load can be reduced on the strength of additional compression of the springs when thermal expansion of the capacitor.

Type B.

Steam turbine DE patent 122078, CL 13/01 14, 1966, in which the module housing has a supporting belt for bearing on the Foundation of the turbine hall, and the connection with the capacitor made through the compensator.

The capacitor of this block is mounted directly on the Foundation of the basement without the use of elastic supports, but due to its connection with the housing through the low-pressure compensator is provided by freedom of vertical movement module without the influence of the weight of the condenser.

In addition, this unit has a rigid connection, transmitting vertical force from the vacuum (the difference between atmospheric pressure and the vacuum in the low-pressure) on the condenser casing. Connection is made in such a way as not to impede thermal growth of the turbine in the longitudinal direction.

According to EN 2151887 C1 "Leningrad Metal plant to power steam turbines (800 MW), with 3 LP cylinder block, connection exhaust with one common capacitor run as hard - welding - type (A), and by means of the compensator type (B) with internal straps, rigid in the vertical direction and compliant in the axial thermal expansion the clusters (hinges and flexible plate).

However, the capacitor is mounted on spring supports, so this structure is of type A.

The closest analogue is the way (H2), according to which the capacitor is rigidly connected with the exhaust nozzles of the turbine. When the capacitor is mounted on springs so that in the working position (when filled with water chambers and the United circulating pipelines) part of the load from the capacitor is transferred to the exhaust pipe, loading the base frame LPT (low pressure cylinder). This load must be greater than the forces caused by the additional compression of the springs when thermal expansion of the capacitor and the current in the direction of separation of the supports of the cylinder from the base frame.

After welding capacitor measure the distance H between the glass and frame. According to the obtained sizes of the processed billet straps and install them at the measurement location, and the installation bolts vivencial and transmit the load on the strap.

In severe capacitors powerful steam turbines instead of bolts used hydraulic jacks.

Described the closest equivalent, it follows that the intention to limit the load on the low-pressure cylinders are in conflict with the substantive part of the technology of mounting the condenser.

Indeed, rigidly locking put the e in the space not filled capacitor after welding to exhaust low-pressure conditions are created for 100% of the load module from the additional mass of the circulating water and the main condensate when completing the capacitor.

This method creates excessive loads on the supporting belt module.

Installed in power plants steam turbine with multiple cylinders low pressure, as observations show, have a tendency to deformation (warping) supports low-pressure, damage to the internal components, instability alignment of the shafting and the flow part, the vibration bearings, built-in module for transient conditions.

The factors that lead to this need in the diagnosis and the results should be recorded on the installation or in poslemontazhny period.

The technical result achieved by the invention is to improve the reliability and efficiency of the turbine by reducing excessive loads on the exhaust side of the cylinder low-pressure (low-pressure) and the support base plate exhaust parts from the condenser.

Reduction of loads on the base plate reduces deformation of the bearing supports, built-in exhaust parts low-pressure, reduces operational misalignment of the United rotor (turbine shaft) and thereby improves the reliability of the turbine unit.

The real load of the exhaust, and a base plate module depend on the design of the connection module and condenser, way bearing capacitor on the Foundation, connecting various pipelines which are connected to the capacitor, with the person installation, operational factors.

Therefore it seems necessary to be able to assess the actual load on the low-pressure exhaust and a certain way to adjust.

To achieve the above result in the mounting of the condenser of a steam turbine having connection with several exhaust low-pressure cylinders, which includes Assembly, pre-alignment, welding of the connecting pipes and fixing in space using a calibrated setup slats under the spring, after the operation of the turbine under load for adjusting the position of the capacitor in the space to reduce loads on the support belt low-pressure cylinders through the exhaust end of the nozzle of the turbine and condenser, to fill the condenser with water, calculated mass, installation of inserts between the top and bottom nozzles and the subsequent connection of the nozzles of the turbine and condenser.

Disconnected the capacitor is filled with water, the weight of which corresponds to the rated load ΔG, remove from the module, and which is determined by the amount of compression Δh block springs under each pillar of the capacitor by its characteristic rigidity To:

ΔG remove = ΣΔh×

Evaluation of loads on the supporting belt cylinder low-pressure (low-pressure) process integrated the test is performed on the sensors of movement for control of the compression springs under all the pillars of the capacitor, sensor slope and built-in supports module operating in the continuous monitoring equipment on a processor basis.

In this way the mounting of the capacitor on the basis of comprehensive tests determined the factors that change of mechanical load on LPT and causing its deformation, calculated load module that need to be accomplished, taking into account the results of the tests performed by the position correction capacitor in space.

Figure 1 for example shows the connection scheme of the three low-pressure cylinders are one of the turbines (800 mW) developed by the capacitor (six exhaust pipes)based on spring blocks.

Figure 2 presents the main elements of one of the spring units, which is based on a capacitor.

The implementation of the invention

Based on comprehensive testing of turbine are determined by factors that change of mechanical load on LPT and causing its deformation, calculated load module that need to be accomplished, taking into account the results of the tests (see "power station", No. 7, 2005 Issue of operational reliability cylinder low-pressure (low-pressure) turbine K-800-240-5 LMZ.........)

For example, turbine 800-240 tests showed the following.

Filling the condenser circulating water leads to the download of prog the n capacitor only Σ ΔG springs = 22 m.≅(22*104H)

The bulk of the circus. water load supporting surface low-pressure cylinders on Gmodulea circus. ≅ 478 m..≅(478*104N) (via rigidly welded exhausts).

Thermal expansion of the exhaust pipes between the module and the condenser lead to the appearance of the elastic force of the compression springs of the capacitor and reduce the support burden on LPT-1, 2, 3.

It is estimated a total of 8 bearings at a temperature of exhaust To=85°

ΣF.≈(130-150)m.≅(140*1044H)

When the estimated temperature of the exhaust module To=170° (emergency) reduction of the support reactions on the module is assessed

ΣΔG=ΣF.≈(260-300)m.≅(275*104N)

Loading module weight of the circus. water Ga circus.=500 m.≅(500*104H) to prevent separation module from the Foundation (in fact, it's more of a joining of pipelines) is in excess of 200 m even accidental overheating of the exhaust (up 170°). If we consider the mass of water condensate 200 t ≅ (200*104N), which also fills the capacitor, the total excess pressures approaching 400 m.

Correction of loads on the supporting belt module is provided by changing the position of the capacitor in space, which is accomplished by the following process sequence:

the turbine stops and raskalivaetsa to the environment and the surrounding temperature of discharging of the capacitor;

disconnect the low-pressure exhaust from the necks of the capacitor with simultaneous monitoring of the following parameters - bearing loads on the load cells on the Foundation slabs, slope supports, compression springs condenser sensor displacements (preferably hardware processor basis in the monitoring mode);

disconnected the capacitor is filled with water (steam space or pipe), the weight of which is compressed springs under the capacitor, forming a gap between the previously connected by pipes (exhaust and neck); the weight of the mass of the water (in our example ≤400 t) fill in the capacitor corresponds to the calculated load ΔG, remove from the module, and which is determined by the amount of compression Δh block springs under each pillar of the capacitor by its characteristic rigidity To:

ΔG remove = ΣΔh×,

the resulting gap after filling of the capacitor calculated amount of drug mass of water between the upper pipe exhaust low-pressure and lower coupling capacitor (neck) is filled in the appropriate box (or a replaceable module) with subsequent welding in rigid connection with the condenser and the replacement couplers for another size when connecting through the expansion joint.

After installation, taking into account the correction loads according to the above method, the redundancy of the loads on the support module will eliminate the Jena, the overall level of stress on the low-pressure exhaust from the filling of the condenser and vacuum operating modes will be reduced by all modes (including during heating and expansion of the capacitor, the current in the direction of separation of the supports of the cylinder from the base frame.), improved modes of the expansion module and will drop deformation exhaust supports.

1. Trugny A.D., Losev S.M. Stationary steam turbine Meters, 1981, s.

2. Bevalac, Weplanet, B. I. Reznikov Installation and commissioning of turbine and auxiliary machinery room. M: Energy, 1976, p.34-35.

1. The method of installation of steam turbine condenser having connection with several exhaust low-pressure cylinders, which includes Assembly, pre-alignment, welding of the connecting pipes and fixing in space using a calibrated setup slats under the springs, wherein after the operation of the turbine under load for adjusting the position of the capacitor in the space to reduce loads on the support belt low-pressure cylinders through the exhaust end of the nozzle of the turbine and condenser, to fill the condenser with water, calculated mass, which corresponds to the calculated load ΔG, remove from the module, and which is determined by the amount of compression Δh block springs under each pillar of the capacitor p is the characteristic of rigidity To:

ΔG remove = ΣΔh·,

installation of inserts between the top and bottom nozzles and the subsequent connection of the nozzles of the turbine and condenser.

2. The method of mounting the condenser of a steam turbine according to claim 1, characterized in that the evaluation of loads on the supporting belt cylinder low-pressure (low-pressure) in the process of comprehensive tests performed by the displacement sensors to control the compression of the springs under all the pillars of the capacitor, sensors gradients on the built-in supports module operating in the continuous monitoring equipment on a processor basis.



 

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FIELD: power engineering; steam turbines.

SUBSTANCE: invention can be used at mounting of heavy-weight condensers of steam turbines connected with several exhaust ports of steam turbine low-pressure cylinders. Invention can be used also at servicing and subsequent adjusting of steam turbines especially, high-power ones. Invention improves reliability and increases economy of turbine in operation owing to decreasing excess loads on exhaust parts of low-pressure cylinders and support foundation plates of exhaust parts from side of condenser, decreasing friction forces along support surfaces of low-pressure cylinders, deformation of supports, formation of cracks and increasing vibration stability of turboset at different loads and modes of operation. According to proposed method of mounting of steam turbine condenser connected with several exhaust ports of low-pressure cylinders including assembling, preliminary truing, welding of connecting branch pipes and fixing in space by means of calibrated setting strips under springs. After operation of turboset under load, position of condenser in space is corrected to reduce load on support belt of low-pressure cylinders by disconnecting exhaust branch pipes of turbine and condenser, filling condenser with water of designed mass, placing inserts between upper and lower branch pipes of designed mass, placing inserts between upper and lower branch pipes and subsequent connection of branch pipes of turbine and condenser. Disconnected condenser is filled with water whose mass corresponds to designed load ΔG taken from low-pressure cylinder which is determined by value of compression Δh of spring unit under each support of condenser, basing on its rigidity characteristic K. ΔG removed from low-pressure cylinder is =ΣΔh x K. Estimation of loads on support belt of low-pressure cylinders in process of complex tests is carried out by displacement pickups checking compression of spring under all supports of condenser, and grade pickups on built-in supports of low-pressure cylinders operating at continuous monitoring by means of processor-based devices.

EFFECT: improved reliability end economy of turbine.

2 cl, 2 dwg

FIELD: the invention refers to the field of heating engineering namely to power installations.

SUBSTANCE: According to the first variant the engine of boiling has a furnace chamber, a drum, a batcher, a collector switched to the drum. At that the furnace chamber with the drum are united in a common metallic body fulfilled with one removable wall, at that the axis of the drum is located horizontally, inside the drum there is a working member in the shape of a shaft leaning with its ends on the bearings installed in the center of each wall of the body from the inner side along the horizontal axis, on the shaft there are firmly fastened in parallel with the axis the planes of blades and a cog-wheel, at that the blades are fulfilled in the shape of metallic plates between which there are mounted metallic partitions forming a ring capacity filled with air and symmetrical to the axis, the steam collector is located outside of the drum. According to the second variant the engine of boiling has a furnace chamber, a drum, a batcher switched to the drum, a collector, at that the furnace chamber with the drum are united in a common metallic body, at that the axis of the drum is located vertically in the center of the bottom and bearings are installed from the inner side of the lid, inside the drum there is a working member in the shape of a shaft whose ends lean on the bearings, on the shaft axis there firmly fastened under an angle to the axis the plates of the blades in the shape of a screw, around the shaft symmetrically to its axis there is a ring capacity filled with air. near the drum there is a hot water collector communicating with it through a launder in the upper part and through the collector in the low part. The working medium in the engine of boiling is water-steam mixture.

EFFECT: the invention allows use kinetic energy of boiling water for fulfillment of mechanical work.

FIELD: mechanical engineering.

SUBSTANCE: invention refers to the field of industry and ship power engineering, predominantly to transport and stationary steam-turbine plants. The design layout of turbine sets and exhausted steam condensing plant includes the main turbine, isolated generator turbines, transonic jet condensing plants of mixing type - condensate transonic jet pimps built in housings of devices for exhaust stem bleeding from turbine sets, and combined remote condensate collector.

EFFECT: invention makes possible, while keeping constant steam turbine power, to exclude conventional stem components of the main condenser with piping for turbine sets exhaust stem condensing from design layout, to lower weight of unit equipment, reduce its volume by (3650) % and to improve reliability of exhaust stem condensing system.

4 dwg

FIELD: energy.

SUBSTANCE: invention relates to electric energy generation system using ecologically clean energy-solar and external steam hybrid electric energy generation system. System comprises solar steam generator outlet end of which is connected to inlet (3) of high pressure steam of turbine (2) through first control valve (18), steam outlet end of external controller (15) of steam is connected to inlet (3) of high pressure steam of turbine (2) through second control valve (20) and second switching valve (19), outlet (4) of low pressure steam turbine unit (2) is connected to inlet end of condensation device (5), while its outlet end is connected to inlet end of deaerator (6), its outlet end is connected to inlet end of pump (7) for supply of water, its outlet end is connected to inlet end of return water of solar steam generator through first switching valve (16), and the outlet end of pump (7) is additionally connected with bypass (11) of return water of external steam through fourth switching valve (23). System further includes tank (9) for storage of soft water.

EFFECT: invention enables using waste heat of industrial production for elimination of dependence on weather and unstable and intermittent concentration of heat solar radiation.

6 cl, 4 dwg

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