CN1207484C - Method for erection of uper-part structure of condenser - Google Patents
Method for erection of uper-part structure of condenser Download PDFInfo
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- CN1207484C CN1207484C CN 98108954 CN98108954A CN1207484C CN 1207484 C CN1207484 C CN 1207484C CN 98108954 CN98108954 CN 98108954 CN 98108954 A CN98108954 A CN 98108954A CN 1207484 C CN1207484 C CN 1207484C
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- upper tank
- vapour condenser
- scaffold
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- maintenance
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Abstract
The subject of this invention is to shorten an installing stage of an upper trunk of a condenser constituting a critical pass of a turbine building construction process and is to reduce the temporarily installed members on their installation work. In the case that an upper trunk 1 of a condenser is to be set, the upper trunk 1, low-pressure water supplying heaters 11, 12 and a frame structure 13 are fed into a lower trunk 2 of the condenser before an upper beam of a turbine pedestal is set. Subsequently, a block having a sheltering footing plate 27 set at the upper trunk 1 is transported from the upper portion to a predetermined position of the lower trunk 2, and the sheltering footing plate 27 is also used as a footing frame for sheltering and working in order to shorten its process.
Description
Technical field
The present invention relates to the installation method of steam steam-turbine power plant vapour condenser superstructure.
Background technique
Below, the vapour condenser of 2 layers of low pressure feed-water heater is that example illustrates existing vapour condenser to have up and down.
In the large condenser for example, in upper tank, be provided with the upper strata, each 2 of lower floors amount to 4 low pressure feed-water heaters.
Wherein, the low pressure feed-water heater on upper strata is arranged on the heater framework, and this heater framework is the frame construction of constructing in upper tank.
The sequence of construction of existing vapour condenser upper tank is roughly as follows.
(1) side plate (comprising header board, back plate) of vapour condenser top lateral body is moved on the vapour condenser lower tank temporary transient the placement.
(2) after turbine block is finished, set up the upper tank side plate.
At this moment, with header board and the back plate that the moving into of top low pressure feed-water heater, lifting are temporarily disturbed, temporarily be hung in earlier not the position of disturbing with the low pressure feed-water heater.
(3) from laterally upper strata low pressure feed-water heater rollably being pulled in the upper box body.
At this moment, the low pressure feed-water heater on upper strata is sling from turbine block portion by interim beam etc. temporarily.
(4) the heater framework is moved in the upper box body, sling from turbine block portion temporarily by interim beam etc.
(5) the low pressure feed-water heater of lower floor is rollably drawn in the upper box body, be arranged on the basis of heater.
(6) set and weld upper box body (side plate+back plate) and heater framework.
(7) the low pressure feed-water heater on upper strata is hung to drop on the heater framework set.
(8) header board of setting and welding upper box body.
In Japanese kokai publication sho 57-119113 communique, disclosed another kind of vapour condenser establishing method.The feature of this method is, will be mounted to unitary construction as the heater framework of building structure, the post that supports this framework and vapour condenser, with standbies of slinging such as low pressure feed-water heaters, at this state, from laterally (side) it horizontally drawn in the upper box body with drawing.But in this method, influenced by the construction engineering progress period of moving into of vapour condenser upper tank, is subjected to the restriction of building engineering.
In addition, in Japanese kokai publication sho 58-53606 communique, disclosed a kind of vapour condenser establishing method, the feature of this method is, after the turbine block major project is finished, move into the parts of upper tank, after upper tank has been assembled in turbine block inside, be hung in again on the beam of turbine block top, carry out the lower part box engineering of vapour condenser.But, in this method, owing to be the parts of moving into vapour condenser in the top of turbine block beam construction back from horizontal (side), so, need more moving into equipment.If move into from the top simply, must consider and the interference of beam that it is not high to move into efficient.
This from vapour condenser laterally (side) move into the installation method of build-up member, move into the basis because of taking for a long time, so a plurality of interim openings must be set.
In addition, drawing in rolling is that the sliding of representative is moved into, and compares with hang down the method for moving into from the top, carry out the setting and the dismounting work of a plurality of interim parts.
Also have a kind of method of moving into of known upper tank parts, can reduce erection sequence, minimizing is moved into and used interim opening, the feature of this method is to adopt goliath, hangs in from top by the opening between the turbine block beam.But in this method, owing to must avoid interference with the turbine block beam, so, move into the difficulty height, and can not move into greater than the large product of opening size.
For this reason, for large product also being hung in from the top, in Japanese kokai publication hei 6-180383 communique, disclosed the building method of following vapour condenser.
That is, earlier several parts of assembling make the big assembly of vapour condenser, with the hoist big assembly of this vapour condenser of slinging, before the top of turbine block beam is built, hang between the post of turbine block, like this, can consider and the interference of turbine block top beam, the big assembly of vapour condenser can be moved into.
Like this, before the top of turbine block beam is built, the formation product of vapour condenser are hung between the post of turbine block, needn't consider and the interference of the top beam of turbine block, the formation product of vapour condenser be moved into this method, with vapour condenser formation product are compared from the method for laterally moving into before, vapour condenser constitutes moving into rapidly of product, and the efficient height, can shorten the construction operation.
But, before the top of turbine block beam is built, the major part of vapour condenser is present in the below of this top beam, so, just relatively more difficult for building this top beam at ground assembling cripple, and when building this top beam, the falling object etc. that must avoid building the position constitutes the influence of product to the vapour condenser of having moved into.After vapour condenser constituted product moving into the vapour condenser mounting point, to build again in the method for top beam of turbine block, the construction of turbine block is relatively more difficult.
Summary of the invention
Therefore, the object of the present invention is to provide before turbine block is finished, the method that the formation product of vapour condenser are moved in this method, can be built above-mentioned turbine block without barrier after described moving into earlier.
To achieve these goals; the installation method of the vapour condenser superstructure of the 1st scheme of the present invention; before the superiors' beam of building turbine block; the lower tank of vapour condenser is moved between the pillar of turbine block; the boxboard of vapour condenser upper tank and the top that the low pressure feed-water heater is moved into lower tank will be constituted; then; build the superiors' beam of turbine block; it is characterized in that; on the boxboard that constitutes upper tank; the maintenance plate that covers the upper tank inboard is set; the operation of avoiding this maintenance plate top is to the influence in the upper tank, and, scaffold is stretched out from the outside of upper tank; protect the below of its extension with scaffold, the scaffold that above-mentioned maintenance plate and scaffold double as are used for the operation that elevation-over is set of this maintenance plate and scaffold.Owing to be before the superiors' beam of turbine block is built, move between the pillar of turbine block from the top with constituting the boxboard of vapour condenser lower tank and upper tank and low pressure feed-water heater and turbine block the superiors beam interference-free, cover in the lower tank of having moved into the maintenance plate, cover the outer side surface of lower tank with scaffold, falling object when making the construction of steam turbine the superiors beam etc. at maintenance plate height place is not fallen in the lower tank, except above-mentioned scaffold, scaffold when also utilizing the maintenance plate as this construction can be moved into the construction of operation and eminence rapidly and expeditiously.
The installation method of the vapour condenser superstructure of the 2nd scheme of the present invention, in the 1st scheme, it is characterized in that, before the boxboard that constitutes upper tank being moved between the pillar of turbine block, maintenance plate and scaffold are set constituting on the boxboard of upper tank in advance, move into together between the pillar of turbine block constituting the boxboard of upper tank and maintenance plate or scaffold.Except the effect of the 1st scheme, move into together between the pillar of turbine block owing to will constitute the boxboard of upper tank and maintenance plate and scaffold, so, move into efficient and improve more.
The installation method of the vapour condenser superstructure of the 3rd scheme of the present invention in the 1st or the 2nd scheme, is characterized in that, before moving into, several boxboards that constitute upper tank is assembled into one mutually.Except the effect of the 1st or the 2nd scheme, owing to boxboard is moved into the state that assembles in advance, so, can reduce the assembling operation after moving into, can shorten operation.
The installation method of the vapour condenser superstructure of the 4th scheme of the present invention, in the 1st or the 2nd scheme, it is characterized in that the low pressure feed-water heater is configured to 2 layers up and down, the low pressure feed-water heater on upper strata is arranged on the lower tank by the framework that oneself stands on the lower tank at least.Except the effect of the 1st or the 2nd scheme, owing to the low pressure feed-water heater after moving into the supporting framework of supporting oneself, so, before moving into, needn't make the assembling thing of upper tank (this upper tank is bearing in the low pressure feed-water heater on the boxboard that constitutes upper tank) and low pressure feed-water heater, and the machinery moved into of the assembling thing that does not need this combination is increased weight, can move into operation rapidly and easily.
Description of drawings
Fig. 1 is with the unitary construction biopsy cavity marker devices of the large condenser of the embodiment of the invention, represents the perspective view that it is inner.
Fig. 2 is the plan view that the upper tank in the expression embodiment of the invention is moved into situation.
Fig. 3 is the vapour condenser plan view after lower floor's low pressure feed-water heater is moved in the embodiment of the invention.
Fig. 4 is the plan view that the framework in the expression embodiment of the invention is moved into situation.
Fig. 5 is the plan view that the framework in the expression embodiment of the invention is moved into precalculated position situation on the vapour condenser lower tank.
Fig. 6 is the plan view of situation during expression is moved on the framework upper strata low pressure feed-water heater in the embodiment of the invention on the way.
Fig. 7 is by the lifting auxiliary hook beam in the embodiment of the invention, the maintenance of holding concurrently will be installed with the upper box body of the scaffold perspective view of situation of slinging.
Fig. 8 will be installed with double maintenance in the embodiment of the invention moves to position situation directly over the vapour condenser lower tank with the upper box body of scaffold plan view.
Fig. 9 is the plan view that the situation of moving into is cut apart the side plate of the vapour condenser upper tank in another embodiment of the present invention in expression.
Figure 10 is expression is contained in the double maintenance in the embodiment of the invention situation on the vapour condenser upper tank with scaffold a plan view.
Figure 11 is the vapour condenser of the expression embodiment of the invention installs situation at steam turbine a plan view.
Figure 12 is that the maintenance of holding concurrently is installed longitudinal section in embodiments of the present invention the upper tank with scaffold.
Figure 13 is the perspective view of the turbine block in the expression embodiment of the invention, and (a) figure represents the situation that the top beam is not built as yet, and (b) the figure expression is installed to the situation of building up on the turbine block with each machine.
Embodiment
Below, the example that is installed as of the vapour condenser of 2 layers of low pressure feed-water heater describes to have up and down.
The effect of vapour condenser is, improves turbine efficiency by the back pressure that lowers steam turbine, and what increase power plant effectively utilizes heat, in addition, and by the discharge vapour condensation with steam turbine, recyclable boiler water supply.
As shown in Figure 1, the cooling tube 6 in the vapour condenser lower tank 2 makes vapour condensation, owing to cooling water does not mix with condensed water, so, the condensed water that recyclable purity is high.
Vapour condenser is made of lower tank 2, upper tank 1, connecting box 3, hydroecium 4, hot well 5 substantially.
Wherein, lower tank 2 and upper tank 1 are the containers that makes the discharge vapour condensation of low-pressure turbine (the following steam turbine that only is called) and keep vacuum, are welded by steel plate system boxboard.
In the nearest large condenser,, in upper tank 1, be provided with the low pressure feed-water heater 11 on upper strata and the low pressure feed-water heater 12 of lower floor in order to save installing space and pipe arrangement.
Below, with reference to the installation method of the description of drawings embodiment of the invention.
Shown in Figure 13 (a), in the construction zone of the steamer machine room of atomic power station, build up turbine block 7, but wouldn't build the beam 8 of its topmost part.
Shown in Figure 13 (b), when turbine block 7 is finished, vapour condenser is moved between the post 9 and post 9 of turbine block, and then on post 9, built each longitudinal and transverse beam 8 of the topmost part, above high-pressure turbine 10, low-pressure turbine 16 and generator 17 are placed on.
The installation of vapour condenser, be when the topmost part beam 8 of turbine block 7 is not built and post 9 begins when finishing, the lower tank 2 of vapour condenser, hydroecium 4 and hot well 5 are hung between the post 9 of turbine block 7 with hoist, assemble as illustrated in fig. 3, then lower floor's low pressure feed-water heater 12 usefulness hoists are hung top in this lower tank 2.
Then, as shown in Figure 4, by wire rope 15 framework 13 is moved into the state of slinging, hung on lower tank 2 from the top with the suspension hook 14 of hoist.
This framework 13 has several feet 6, is disposing across lower floor low pressure feed-water heater 12 ground, and framework 13 is supported oneself by its pin 6.
Hang onto the framework 13 on the lower tank 2, stand on the lower tank 2 certainly by its pin 6 as illustrated in fig. 5.
Then, as shown in Figure 6, upper strata low pressure feed-water heater 11 is moved into the state of slinging by the wire rope 15 that the suspension hook 14 from hoist hangs down, and this upper strata low pressure feed-water heater 11 hangs on the top of framework 13 from the top, and is arranged on the framework 13.
Then, as shown in Figure 7, on the ground-mounted place of building site, be that header board 20, back plate 21 and 2 side plates 23 are assembled into one earlier with the boxboard that constitutes upper tank 1, by welding scaffold is provided with accessory 24 and is fixedly installed on this boxboard.
As shown in figure 12, be provided with on the accessory 24, the side that double maintenance is used scaffolding board 27 with the lower end and the double maintenance of the pin 28 of scaffolding board 27 with bolt at scaffold.
By such fixation method, the maintenance of holding concurrently is stretched out from boxboard laterally with scaffolding board 27, and encirclement upper tank 1 makes upper tank 1 as a whole with 27 one-tenth of scaffolding boards with double maintenance.
As shown in Figure 7, with the wire rope 15 that hangs down from hoist, the tetragonal lifting auxiliary hook beam 29 of slinging hangs over the upper end of upper tank 1 to the wire rope 30 that hangs down from this lifting auxiliary hook beam 29, will form integral upper case 1 with hoist and sling from the ground-mounted place.
When this was sling, because wire rope 30 is vertical, so the substantially horizontal load when slinging is not easy to affact on the boxboard of upper tank 1, upper tank 1 was not easy to produce distortion.
To fix double maintenance with hoist and sling with the upper tank 1 of scaffolding board 27, transport to as illustrated in fig. 8 lower tank 2 directly over.
Then, upper tank 1 is moved as illustrated in fig. 2 to the left, make the hole 25 that is opened on the plate 21 of back be positioned at the left end one side top of upper strata low pressure feed-water heater 11, then fall upper tank 1, when hole 25 and upper strata low pressure feed-water heater 11 when high, the decline of upper tank 1 is temporarily stopped, upper tank 1 is moved to the right, upper strata low pressure feed-water heater 11 is passed hole 25, then upper tank 1 is lowered on the lower tank 2, install.
So, as illustrated in fig. 2, upper tank 1 assembly after being moved to the left, the center of lower tank 2 is fallen earlier, make the height in hole 25 become the height that upper strata low pressure feed-water heater 11 can enter, then, the upper tank assembly is moved to the right, so also can not process the big otch 26 on the header board 20.
Like this, the opening portion that will seal can be little as hole 25 in the future, and is big unlike otch 26, so blocked job is easy, this operation can shorten.The hole 25 of the otch 26 of header board 20 and back plate 21 finally will be sealed.
After upper tank 1 has been placed on the lower tank 2, above lower tank 2 or framework 13 near the upper end of upper tank 1, set up prop 31, the maintenance of will holding concurrently as illustrated in fig. 10 is arranged on this prop 31 with scaffolding board 32, and maintenance covered upper tank 1 inboard with scaffolding board 32 with holding concurrently.
Then, the top beam 8 of building turbine block 7.
When this beam 8 of building, each double maintenance utilizes the amount of setting newly of used one-shot job scaffold in the time of can reducing building girder 8 as the operation scaffold with scaffolding board 27,32.
When the beam 8 of building turbine block 7, though there is the falling object of concrete or coating etc. to drop on the upper tank 1,, this falling object is caught with scaffolding board 27,32 by double maintenance, can prevent to fall in upper tank 1 outer wall or the upper tank 1, can bring into play care action.
Like this, the upper tank 1 and each the low pressure feed- water heater 11,12 in the case, the pipe arrangement etc. that are covered with scaffolding board 27,32 by the maintenance of holding concurrently, by double maintenance usefulness scaffolding board 27,32 protect, maintenance.
Like this, for example can carry out the vapour condenser assembling operation in the upper tank 1 and the constructions work of turbine block top beam 8 concurrently.
After top beam 8 constructions of turbine block 7, carry out the installation of connecting box 3, low-pressure turbine 16.
When the maintenance that no longer needs to hold concurrently during, they can be disintegrated, dismantle with scaffolding board 27,32.
When scaffolding board 32 was used in the double maintenance of disintegrating, dismantle, prop 31 was also dismantled simultaneously.
When removing the maintenance of holding concurrently with scaffolding board 27, unload and be connected the maintenance of holding concurrently and bolt between the accessory 24 be set with scaffolding board 27 and scaffold, remove the maintenance scaffolding board 27 of holding concurrently, scaffold is provided with accessory 24 and is attached on the upper tank 1, uses when for next time scaffolding board being installed.
When finishing, as shown in figure 11, remove each double maintenance scaffolding board 27,32.
When former because of ground-mounted lack of space etc. thereby each boxboard of upper tank 1 can not be assembled when in aggregates, can be as shown in Figure 9, with being installed, the maintenance of holding concurrently cuts apart the precalculated position that hangs in and be placed on temporarily on the lower tank 2 with each boxboard of the upper tank 1 of scaffold 27, after the boxboard of upper tank 1 all moved into, assemble upper tank 1 again.
In addition, each boxboard of upper tank 1 is assembled, after forming an integral body together with double maintenance with scaffolding board 27, in the time of can not moving into because the lifting capacity of hoist is not enough, can be at the state of the header board 20 of removing upper tank 1, upper tank 1 and double maintenance are assembled into one with scaffolding board 27, moved into this incorporate upper tank 1 after, move into header board 20 more from behind and assemble.
At this moment, during the upper tank 1 of slinging no header board 20 with hoist, with Fig. 7 similarly, use lifting auxiliary hook beam 29 to sling, make upper tank 1 indeformable.
Even if if like this, when the lifting capacity of hoist is still not enough, can after being divided into 2 parts with scaffolding board 27 and boxboard all-in-one-piece upper tank about 1, move into again by double maintenance.
Which kind of situation no matter can be set up at fastening foot hand on the boxboard of upper tank 1 and be moved into after with accessory 24 surely, moves into the maintenance of holding concurrently then with scaffolding board 27, and double maintenance is installed on the scaffold setting usefulness accessory 24 with scaffolding board 27.
Double maintenance is steel plates with the member of scaffolding board 27,32.
When adopting flase floor as this steel plate, because flase floor is a kind of perforated panel, so, on flase floor, lay sheet material, stop foreign matters such as falling object or dust to pass through, can bring into play care action.
Double maintenance in the upper tank 1 is with scaffolding board 32 and prop 31, and the place that placing element is used during also as the top beam 8 of building turbine block 7 is so prop 31 and double maintenance will have enough intensity with scaffolding board 32.
According to the present invention, owing to can move into the vapour condenser superstructure from the top and install, can cancel and be used for interim member that this structure is laterally drawn in, can reduce the vapour condenser member and move into the area that occupies with interim member, in addition, owing to will be attached to the operation scaffold that the scaffold of vapour condenser is used as vapour condenser periphery engineering, so, the new scaffold amount of setting of vapour condenser periphery engineering can be reduced, operation can be shortened.
In addition, scaffold is stretched out laterally, the maintenance zone of extension below is enlarged towards the outside, can also obtain can be with the upper tank outside of the vapour condenser effect as the maintenance zone.
According to the present invention, can move into the vapour condenser superstructure from the top installs, can save and be used for interim member that this structure is laterally drawn in, can reduce the vapour condenser member and move into the area that occupies with interim member, in addition, ended and reduce by the maintenance plate resistance with the interference of vapour condenser periphery engineering, so, erection sequence improves, and can shorten operation.
In addition, owing to the operation scaffold that above-mentioned maintenance plate double as is used for the operation of supporting backplate that elevation-over is set, so the amount of setting up that can also obtain new scaffold reduces, and can shorten the effect of the construction flow chart of vapour condenser and adjacent area thereof.
Invention according to the record of the 1st scheme, can move into the vapour condenser superstructure from the top installs, can save and be used for interim member that this structure is laterally drawn in, can reduce the vapour condenser member and move into the area that occupies with interim member, in addition, ended and reduce by the maintenance plate resistance with the interference of vapour condenser periphery engineering, so, erection sequence improves, and can shorten operation, and, owing to rest the operation scaffold that backplate is also used as the top operation of maintenance plate, so, can obtain reducing the amount of setting up of new scaffold, the effect that the operation of the construction operation of vapour condenser and adjacent area thereof shortens more.
According to the invention of the 2nd scheme record, except the effect of the invention of the 1st scheme,,, can shorten operation so move into the efficient height because boxboard and maintenance plate, the scaffold of upper tank are moved into the mounting point of vapour condenser together.
According to the invention of the 3rd scheme record, except the effect of the invention of the 1st or the 2nd scheme,, can cut down assembling procedure in the mounting point by the upper tank that assembles is moved into the mounting point, shorten operation more.
Invention according to the record of the 4th scheme, except the effect of the invention of the 1st or the 2nd scheme, when the low pressure feed-water heater is configured to up and down 2 layers, because the low pressure feed-water heater on upper strata can be by the supporting framework that stands on certainly on the lower tank, so, before being set to upper tank on the lower tank, can earlier the low pressure feed-water heater on upper strata be moved into upper tank from the top, therefore, even the low pressure feed-water heater is configured to two layers up and down, also can save the interim member of laterally drawing in usefulness, can reduce the vapour condenser member and move into the area that occupies with interim member, even low pressure water supply heater configuration becomes two layers up and down, also can shorten operation.
According to the present invention, cover in the case of vapour condenser upper tank with scaffolding board with the maintenance of holding concurrently and the outer wall top of upper tank, avoid with vapour condenser near the interference of engineering, and the scaffold that can provide this project to use simultaneously, the newly-increased scaffold amount of this project can be reduced, operation can be shortened.
Claims (4)
1. the installation method of a vapour condenser superstructure, before the superiors' beam of building turbine block, the lower tank of vapour condenser is moved between the pillar of described turbine block, the boxboard of described vapour condenser upper tank and the top that the low pressure feed-water heater is moved into described lower tank will be constituted, then, build the superiors' beam of described turbine block, it is characterized in that, the maintenance plate that covers described upper tank inboard is set on described upper tank, the operation of described maintenance plate top is not influenced in the described upper tank, and, scaffold is stretched out from the outside of described upper tank, below described its extension of scaffold maintenance, and with described maintenance plate and the scaffold scaffold that the elevation-over operation is used that is provided with as described maintenance plate and scaffold.
2. the installation method of vapour condenser superstructure as claimed in claim 1, it is characterized in that, before the boxboard that constitutes upper tank being moved between the pillar of turbine block, maintenance plate and scaffold are set constituting on the boxboard of described upper tank in advance, move into together between the pillar of described turbine block constituting the boxboard of described upper tank and described maintenance plate or scaffold.
3. the installation method of vapour condenser superstructure as claimed in claim 1 or 2 is characterized in that, before moving into, several boxboards that constitute upper tank is assembled into one mutually.
4. the installation method of vapour condenser superstructure as claimed in claim 1 or 2, it is characterized in that, the low pressure feed-water heater is configured to 2 layers up and down, and the framework that the low pressure feed-water heater on described at least upper strata is arranged on the lower tank by oneself with standing is arranged on the described lower tank.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP133196/1997 | 1997-05-23 | ||
| JP133196/97 | 1997-05-23 | ||
| JP9133196A JP2852293B2 (en) | 1996-05-27 | 1997-05-23 | Installation method of condenser top configuration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1200431A CN1200431A (en) | 1998-12-02 |
| CN1207484C true CN1207484C (en) | 2005-06-22 |
Family
ID=15098970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98108954 Expired - Fee Related CN1207484C (en) | 1997-05-23 | 1998-05-22 | Method for erection of uper-part structure of condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1207484C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953599A (en) * | 2016-05-17 | 2016-09-21 | 山东电力建设第工程公司 | Construction method of condenser |
| JP2019190280A (en) * | 2018-04-18 | 2019-10-31 | 株式会社神戸製鋼所 | Thermal energy recovery system and installation method for thermal energy recovery system |
-
1998
- 1998-05-22 CN CN 98108954 patent/CN1207484C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1200431A (en) | 1998-12-02 |
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