GB1580199A - Method and device for transferring condensates from a low pressure network into a high pressure network in a system of generation distribution and utilization of condensable vapour - Google Patents
Method and device for transferring condensates from a low pressure network into a high pressure network in a system of generation distribution and utilization of condensable vapour Download PDFInfo
- Publication number
- GB1580199A GB1580199A GB1910479A GB1910479A GB1580199A GB 1580199 A GB1580199 A GB 1580199A GB 1910479 A GB1910479 A GB 1910479A GB 1910479 A GB1910479 A GB 1910479A GB 1580199 A GB1580199 A GB 1580199A
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- Prior art keywords
- buffer
- tank
- condensates
- pressure
- vapour
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
- F24D1/08—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
(54) IMPROVEMENTS IN OR RELATING TO METHOD AND
DEVICE FOR TRANSFERRING CONDENSATES FROM A LOW
PRESSURE NETWORK INTO A HIGH PRESSURE NETWORK
IN A SYSTEM OF GENERATION, DISTRIBUTION AND
UTILIZATION OF CONDENSABLE VAPOUR
(71) 1, PIERRE, EUGENE REGA
MEY, a Swiss citizen, residing at 35 Le Calabeet, 69130 Ecully, France, do hereby declare the invention for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement: - This invention relates to subject matter divided out of the Specification of Application
No. 47316/76 (Serial No. 1,580,198).
The present Invention relates to a method and a device for transferring condensates from a low pressure network into a high pressure network in a system of vapour production, distribution and utilization of condensable vapour.
It is known that, in a vapour plant wherein the pressure and temperature are practically or at least approxiinateLy constant everywhere and the same at all points, except for the pressure losses, the condensates are collected by gravity at one or several low local or general points of the system from which they are retaken and delivered for example mechanically in order to be reintroduced directly into at least one vapour-generating boiler ensuring the production of feed vapour for the plant.A plant of this type therefore comprises networks of lines of vapour and condensates at substantially constant pressure and temperature, except for the flow pressure loss variations and one or sevaal condensate pumping subustations for direct reintroduction of the condensates into the boilers. In the case of plants comprising several networks at different pressures obtained by expansion of the vapour up-stream of rhese networks as many pumping sub-stations have to be plro- vided as there are networks at different pressures.Each pumping sub-station also oom- prises a buffer-tank for gravity collection of the condensates and a delivery pump maintained under static head by this buffer-tank.
The penis of, respectively, each of these pumping sub-stations may deliver the con densates either directly into the vapour boilers by providing the necessary delivery head or into the condensate accumulation buffer-tank of another pumping sub srattion serving a network of lines at a higher pressure, from which the pump of this latter pumping subfftation will, in its turn, deliver all the condensates admitted into its associated buffer-tank to return the same for example into a vapour boiler.
It is sometimes possible to design a plant at lower pressure with a low point located in geometrical superelevation with respect to that of the network of lines at higher pressure. In this case, the technical problem consists in discharging the condensates from the network at the lower pressure roy mere gravity into the network at the higher pressure without using any delivery pump ior equivalent means of forced circulation. On the other hand, free cornmunication between the two networks with different pressures must be avoided, for such a free commaication would result in automatically equalizing the pressures.
This ireehuical problem is solved by the invention.
According to one aspect of the invention there is provided a method for the discharge and recovery of condensates in a system of vapour production and distribution of consable vapour in a closed circuit at approxi- mately constant pressure and temperature, the aforesaid system including at least one evapor ating boiler and serving at least two systems of stations utilizing or consuming vapour through condensation d the latter at, res pectively two different pressures, i.e. a high pressure and a low pressure, respectively, and at least part of the condensates discharged from each system of stations is recovered by directed and mostly or wholly natural gravi rational return-flow, collected and accumu- latex at least temporarily into an individual storage reserve, at least rhe condensates of the storage reserve of the highwpressure system of stations being reintroduced directly into the said boiler as required by the latter by mechanically forced and continuous circulation, with automatic control of the rate of outflow of the condensates proceeding from the said storage reserve of the said low-pressure system of stations, wherein the rate of flow
of the condensates into the said storage
reserve of the said low pressure system or stations is automatically controlled in suich a manner that the respective controls of the rates of inflow and outflow, respectively, are performed in mutually opposite relationship, said inflow being cut off when said outflow takes place, and vice versa, and wherein the said storage reserve of the lowpressure system
is isolated from the latter by stopping the inflow of condensates proceeding therefrom,
and then equalizing the respective pressures
in the two storage reserves of the two systems
of stations by providing a communication
between rhe latter, land wherein the conden- sates from the said storage reserve of the lowípressure system are discharged into the said storage reserve of the high-pressure system. Preferably the method is of the kind in which the vapour feeding the said lowpressure system of stations is obtained by
expanding part of the vapour feeding rhe said
system of stations.Desirably at least part of
the condensates discharged from each system
of stations is recovered by directed, substan tally dry and mostly or wholly natural gravi
tational zeturn fltav, collected and accumu lated at least into a said individual storage
reserve. Conveniently the rate of inflow of the
condensates into 'the said storage reserve of
the said low pressure system of stations is automatically controlled by the movement of a
float to effect on-off control directly dependent
on the amount of condensates present at any
given instant in the storage reserve of the said
low-pressure system of stations.
According to another aspect of the invention
there is provided a device with a condensate
transfer lock arrangement for carrying out the
method, the device comprising at least two
systems utilizing vapour at a high pressure and
low pressure, respectively, each system when
in use provided with at least one live-vapour
supply line feeding heat-exchange apparatuses
and with at least one condensate return line
to discharge the said condensates from the
said lappartuses and opening into an upper
portion of at least one suitably located buffer
tank, at least one of the buffer tanks being prow vided with a liquidelevel controller provided
with monitoring means and the said low
pressure live-vapour supply line being con
nected in branched-eff relationship to the said high-pfessure live-vapour line through the
medium of a vapour expansion or relief valve,
wherein rhe said high-pressure buffer-tank is
connected to the said boiler by a condensate directwreintroduction piping starting from the
bottom of the said highressure buffer-tank
and containing a forcing or delivery pump adapted to operate permanently and be main
tained under a static head by the said high
pressure buffer-tank in order to withdraw
liquid from, the said high-pressure bufferwrank towards rhe inlet into the said boiler, wherein
the said lowpressure buffer rank is adapted
ro be mounted higher than the said high
pressure buffer-tank, the top of which is connected to the base of the said lowfpressure buffer-tank by a drain conduit permanently communicating with the said highpressure condensate return line, wherein the said low
pressure condensate return line and rhe said drain conduit are respectively provided with
two servo-motor activated stop valves located respectively up-stream and down-stream of the said buffer-tank and whose servo-motors are respectively connected through remotecontrol transmissions to the monitoring means
of the said liquidXlevel controller. Preferably the heat-exchange apparatuses are mounted in parallel.Advantageously the said forcing or delivery pump is adapted to operate permanently and ;be maintained under a static head by the said high pressure buffer-tank in order to withdraw liquid from the said highpressure buffer-tank with a motorXactuated valve in the said piping towards the inlet into the said boiler, the said valve being controll able automatically in directly dependent relationship with the liquid level in the sald boiler at any given instant.Conveniently rhe up-stream end of the said drain conduit penetrates into rhe said low-pressure buffer-tank up to an upper portion of the latter through a substantially vertically arranged tube provided with orifices at its base.
Preferred forms of the invention will now be described, by way of example, with reference to the accompanying drawings, wherein: - Figure 1 illustrates the principle of a transfer lock arrangement for the condensates proceeding from a lowpressure network, in the main pumping substation of a high pressure network, using an auxiliary buffer-tank in the lowpressure network interconnected with the high-pressure newrk; Figure 2 is a fragmentary view, to a larger scale, of the interconnected main buffer-tank and auxiliary buffer-tank system shown in Figure 1; ;
Figure 3 is an isolated fragmentary view of the aforesaid auxiliary buffer-tank, showing a modified form thereof.
Figure 1 shows a condensate transfer lock device in a gened system comprising at least two systems utilizing vapour at high pressure, and at low pressure, respectively, each including at least one live-vapour supply line (117 in the highHpressure system and 117e in the low-pressure system) feeding heat exchange apparatuses mounted for example in parallel (119 in the highwpressure system and 119a in the low pressure system) and at least one condensate return line (118 in the highpressure system and 11 8a in the low-pressure system) to discharge the said condensates from the said apparatuses and opening into the upper portion of at least one buffer-tank located suitably at the low point of the system considered (i.e. the buffer-tank 14 in the highpressure system and the 'buffer-tank 105 in the lowspressure system). At least one of the two buffer-tanks and in particular the buffertank 105 of the low-pressure system may be provided with a level controller 107.The lowpressure livegvapour supply line 117a is in particular tapped off the high-pressure livevapour supply line 117 through the medium of a steam pressure-reducing valve 127 or a like automatic pressure regulator, whereas the high-pressure buifer tank 14 is connected to a boiler through a piping 16 for reintroduction of the condensates, leaving from the bottom of rhe said highSressure buffer-tank 14 and containing a forcing or delivery pump 17 adapted to operate permanently and maintained under static head by the high-pressure buffertank 14 and withdrawing from within the latter.A motor-driven valve controlled auto matically in directly dependent relationship with the liquid level in the said boiler at any given instant and is mounted for example in the piping 16 towards the inlet of this boiler. Each utilizer apparatus 119, ll9a is connected between the two corresponding live vapour supply lines 117, 117a and condensate return lines 118, 11 8a, respectively, through two live-vapour inflow pipes 120, 120a and condensate outflow pipes 121, 121a, each livevapour inflow pipe 120, 120a being advan rageously connected to the associated livevapour supply line 117, 117a through the medium of an ascending crook or the like 120", 120"a, the concavity of which is directed downwards in order to prevent the condensates possibly present in the live-vapour supply conduit 117, 11 7a, from entering the inflow pipes 120, 120a.
This device is characterized in that the lowpressure buffer-tank 105 is located higher than the highSressure buffer-tank 14, the upper portion or top of which is connected to the base of the lowSressure buffer-tank 105 through a drain conduit 15' permanently corronunicating with the ihigh-pressure condensate return line 118 (connected to the buffer-tank 14 by the collector 15), whereas the low-pressure condensate return line 118a and the drain conduit 15' are respectively provided with two servo-motor-actuated stop valves 128, 129 located up stream and downstream, respectively, of the buffer-tank 105 and the servomotors of which are respectively connected through remote-control transmissions 130, 131 to the monitoring member of the liquid level controller 107 mounted on the buffer-tank 105, so that the operation of this whole arrangement is cyclical and takes place as follows.
Initially, in the absence of condensates in rhe buffer-tank 105 of the lowipressure system, the iiquidA.evel controller 107 ensures simultaneously the closing of the down-stream stop valve 129 and the opening of the up-stream stop valve 128. The buffer-tank 105 is then at the pressure of the lowzpressure system and the condensates accumulate therein by flowing by gravity from the line 118a. When the buffer-tank 105 is full, the liquid-level controller 107 ensures the opposite operations, i.e. the cling of the up-stream stop valve 128 and the opening of the downtream stop valve 129.On the opening of the down-stream stop valve 129, the steam filling the upper portion of the high-pressure condensate return line 118 and/or of the high-pressure buffertank 14, plasses through the pipe 15' and the down-stream stop valve 129 and enters from below the low-pressure buffer-tank 105, thus raising the pressure therein to the highpressure value of the high-pressure system.
Thereafter, when the pressure equilibrium is reached, the condensates flow by gravity from the buffer-tank 105 into the high-pressure system i.e. into the buffer-tank 14 constituting the low point of the latter system. During that time the condensates of the lowWpressure system continue to arrive through the line 118a and accumulate before the up-stream isolating stop valve 128.This årcumstance must therefore be raken into account in designing the iowressure system and in particular the condensate return line 11 8a. When the buffer-tank 105 of the low-pressure system becomes empty, its liquid-level controller 107 ensures a new filling-and-draining cycle with a repetition of the aforementioned operations.
This arrangement offers the advantage of allowing the condensates to be discharged from a low-pressure system into a highpressure system, saving at least one pump and various accessories.
The conduits 15 and 15' are in permanent cemmlunicarion with one another through the medium of the buffer-tank 14 and, also through a direct connecting conduit 132 represented by a dotted line in Figure 1. The bufferztank 105, which is advantageously cylindrical in shape, may be arranged either horizontally as shown in Figure 1 or vertically as in Figures 2 and 3. According to a preferred feature of the invention, rhe upstream end d the drain conduit 15' penetrates or is extended into the lowzpressure buffer-tank 105 up to the upper portion of the latter by a substantially vertical tube 15'a provided at its base with orifices 133.The tube 15'a facilitates the upward passage of rhe high-pressure vapour pro ceeding from the buffer-tank 14 when the cycle or operation is reversed, i.e. when the isolating valve 129 is opened, whereas the lower orifices 133 allow the condensates in the buffer-tank 105 to enter the drainpipe 15'.
WHAT I CLAIM IS:
1. A method for the discharge and recovery of condensates in a system of vapour production and distribution of condensable vapour in a closed circuit at approximately constant pressure and terpperature, the aforesaid system including at least one evaporating boiler and serving at least two systems of stations udliz- ing or consurning vapour through condensation of the latter at, respectively two differS ent pressures, i.e. a high pressure and a low pressure, respecrively, and at least part of the condensates discharged from each system of stations is recovered by directed and mostly
or wholly natural 'gravitational return-flow,
collected and accumulated at least temporarily into an individual storage reserve, at least the
condensates of the storage reserve of the high
pressure system of stations being reintroduced
directly into the said boiler as required by
the latter by mechanically forced and con sinuous drculation, with automatic control of the rate of outflow of the condensates pro
ceeding from the said storage reserve of the
said lowpressure system of stations, wherein
the rate of inflow of the condensates into the said storage reserve of the said low pressure system of stations is automatically controlled lin such a manner that the respective controls
of the rates of inflow and outflow, respec
tively, are performed in mutually opposite relationship, said inflow 'being cut off when
said outflow takes place, and vice versa, and
wherein the said storage reserve of the low
pressure system is isolated from the latter by
stopping the inflow of condensates proceeding therefrom, and then equalizing the respective
pressures in the two storage reserves of the
two systems of stations by providing a com
munication between the latter, and wherein the
condensates from the said storage reserve of
the low-pressure system are discharged into rhe said storage reserve of the high-pressure system.
2. Method according to Claim 1, wherein
the method is of the kind in which the vapour
feeding the said low-pressure system of sta
tions is obtained by expanding part of the
vapour feeding the said system of stations.
3. Method according to claim 1 or Claim
2, wherein the at least part of the condensates
discharged from each system of stations is
recovered by directed, substantially dry and
mostly or wholly natural gravitational return flow, collected and accumulated at least into
a said individual storage reserve.
4. Method according to any preceding
claim, wherein the rate of inflow of the con
den'sates into the said storage reserve of the
said low pressure system of stations is aut magically controlled by the movement of a
float to effect on-off control directly dependent
on the amount of condensates present at any given instant in the storage reserve of the said low-pressure system of stations.
5. A method according to Claim 1 sub stantially as herein described with reference to any one of Figures 1 to 3 of the accompanying drawings.
6. Device provided with a condensate transfer lock arrangement for carrying out the method claimed in Claim 1, comprising at least two systems utilizing vapour at a high pressure and low pressure, respectively, each system when in use provided with at least one live-vapour supply line feeding heatexchange apparatuses and with at least one condensate return line to discharge the said condensates from the said apparatuses and opening into an upper portion of at least one suitably located buffer-tank, at least one of the buffer tanks being provided with a liquidlevel controller provided with monitoring means and the said iowpressure live-vapour supply line being connected in branched-off relationship to the said highpressure livevapour line through the medium of a vapour expansion or relief valve, wherein rhe said highpressure buffer-tank is connected to rhe said bier by a condensate direct-reintroduction piping starting from the bottom of the said highpressure buffer-tank and containing a forcing or delivery plump adapted to operate permanently and be maintained under a static head by the said highprrssure buffer-tank in order to withdraw liquid from the said higipressure buffer-tank towards the inlet into the said boiler, wherein the said lowpressure buffer-tank is adapted to be mounted higher than the said high-pressure buffer-tank, the top of which is connected to the base of the said lowpressure buffer-tank by a drain conduit permanently communicating with the said high pressure condensate return line, wherein the said low-pressure condensate return line and the said drain conduit are respectively provided with two servomotor- activated stop valves located respeotively upstream and down-stream of the said buffertank and whose servo-motors are respectively connected through remote-control transmissigns to the monitoring means of the said liquid-level controller.
7. Device according to Claim 6, wherein the heat-exchange apparatuses are mounted in parallel.
8. Device according to Claim 6 or Claim 7, wherein the said forcing or delivery pump is adapted to operate permanently and be maintained under a static head by the said high-pressure buffer-tank in order to withdraw liquid from the said high-pressure buffertank with a motor-actuated valve in the said piping towards the inlet into the said boiler,
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
1. A method for the discharge and recovery of condensates in a system of vapour production and distribution of condensable vapour in a closed circuit at approximately constant pressure and terpperature, the aforesaid system including at least one evaporating boiler and serving at least two systems of stations udliz- ing or consurning vapour through condensation of the latter at, respectively two differS ent pressures, i.e. a high pressure and a low pressure, respecrively, and at least part of the condensates discharged from each system of stations is recovered by directed and mostly
or wholly natural 'gravitational return-flow,
collected and accumulated at least temporarily into an individual storage reserve, at least the
condensates of the storage reserve of the high
pressure system of stations being reintroduced
directly into the said boiler as required by
the latter by mechanically forced and con sinuous drculation, with automatic control of the rate of outflow of the condensates pro
ceeding from the said storage reserve of the
said lowpressure system of stations, wherein
the rate of inflow of the condensates into the said storage reserve of the said low pressure system of stations is automatically controlled lin such a manner that the respective controls
of the rates of inflow and outflow, respec
tively, are performed in mutually opposite relationship, said inflow 'being cut off when
said outflow takes place, and vice versa, and
wherein the said storage reserve of the low
pressure system is isolated from the latter by
stopping the inflow of condensates proceeding therefrom, and then equalizing the respective
pressures in the two storage reserves of the
two systems of stations by providing a com
munication between the latter, and wherein the
condensates from the said storage reserve of
the low-pressure system are discharged into rhe said storage reserve of the high-pressure system.
2. Method according to Claim 1, wherein
the method is of the kind in which the vapour
feeding the said low-pressure system of sta
tions is obtained by expanding part of the
vapour feeding the said system of stations.
3. Method according to claim 1 or Claim
2, wherein the at least part of the condensates
discharged from each system of stations is
recovered by directed, substantially dry and
mostly or wholly natural gravitational return flow, collected and accumulated at least into
a said individual storage reserve.
4. Method according to any preceding
claim, wherein the rate of inflow of the con
den'sates into the said storage reserve of the
said low pressure system of stations is aut magically controlled by the movement of a
float to effect on-off control directly dependent
on the amount of condensates present at any given instant in the storage reserve of the said low-pressure system of stations.
5. A method according to Claim 1 sub stantially as herein described with reference to any one of Figures 1 to 3 of the accompanying drawings.
6. Device provided with a condensate transfer lock arrangement for carrying out the method claimed in Claim 1, comprising at least two systems utilizing vapour at a high pressure and low pressure, respectively, each system when in use provided with at least one live-vapour supply line feeding heatexchange apparatuses and with at least one condensate return line to discharge the said condensates from the said apparatuses and opening into an upper portion of at least one suitably located buffer-tank, at least one of the buffer tanks being provided with a liquidlevel controller provided with monitoring means and the said iowpressure live-vapour supply line being connected in branched-off relationship to the said highpressure livevapour line through the medium of a vapour expansion or relief valve, wherein rhe said highpressure buffer-tank is connected to rhe said bier by a condensate direct-reintroduction piping starting from the bottom of the said highpressure buffer-tank and containing a forcing or delivery plump adapted to operate permanently and be maintained under a static head by the said highprrssure buffer-tank in order to withdraw liquid from the said higipressure buffer-tank towards the inlet into the said boiler, wherein the said lowpressure buffer-tank is adapted to be mounted higher than the said high-pressure buffer-tank, the top of which is connected to the base of the said lowpressure buffer-tank by a drain conduit permanently communicating with the said high pressure condensate return line, wherein the said low-pressure condensate return line and the said drain conduit are respectively provided with two servomotor- activated stop valves located respeotively upstream and down-stream of the said buffertank and whose servo-motors are respectively connected through remote-control transmissigns to the monitoring means of the said liquid-level controller.
7. Device according to Claim 6, wherein the heat-exchange apparatuses are mounted in parallel.
8. Device according to Claim 6 or Claim 7, wherein the said forcing or delivery pump is adapted to operate permanently and be maintained under a static head by the said high-pressure buffer-tank in order to withdraw liquid from the said high-pressure buffertank with a motor-actuated valve in the said piping towards the inlet into the said boiler,
the said valve being controllable automatically in directly dependent relationship with the liquid level in the said boiler at any given instant.
9. Device according to any one of Claims 6 to 8, wherein the up-stream end of rhe said drain conduit penetrates into the said lowpressure buffer-tank up to an upper porrion of the latter through a substantially vertically arranged tube provided with orifices at its base.
10. A device suitable for carrying out rhe method claimed in Claim 1 substantially as herein described and with reference to any one of Figures 1 to 3 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1910479A GB1580199A (en) | 1977-05-12 | 1977-05-12 | Method and device for transferring condensates from a low pressure network into a high pressure network in a system of generation distribution and utilization of condensable vapour |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1910479A GB1580199A (en) | 1977-05-12 | 1977-05-12 | Method and device for transferring condensates from a low pressure network into a high pressure network in a system of generation distribution and utilization of condensable vapour |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1580199A true GB1580199A (en) | 1980-11-26 |
Family
ID=10123858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1910479A Expired GB1580199A (en) | 1977-05-12 | 1977-05-12 | Method and device for transferring condensates from a low pressure network into a high pressure network in a system of generation distribution and utilization of condensable vapour |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1580199A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374700A (en) * | 2019-07-18 | 2019-10-25 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of gas-steam combined cycle set drained water recovery system |
-
1977
- 1977-05-12 GB GB1910479A patent/GB1580199A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374700A (en) * | 2019-07-18 | 2019-10-25 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of gas-steam combined cycle set drained water recovery system |
| CN110374700B (en) * | 2019-07-18 | 2024-05-03 | 中国电力工程顾问集团西南电力设计院有限公司 | Drainage recovery system of gas-steam combined cycle unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |