CN113482900A - Non-coaxial steam-driven feed pump preposed pump speed regulating system under deep frequency conversion working condition - Google Patents
Non-coaxial steam-driven feed pump preposed pump speed regulating system under deep frequency conversion working condition Download PDFInfo
- Publication number
- CN113482900A CN113482900A CN202110860018.9A CN202110860018A CN113482900A CN 113482900 A CN113482900 A CN 113482900A CN 202110860018 A CN202110860018 A CN 202110860018A CN 113482900 A CN113482900 A CN 113482900A
- Authority
- CN
- China
- Prior art keywords
- pump
- preposed
- frequency conversion
- steam
- feed pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 45
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 230000008859 change Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a speed regulating system of a non-coaxial steam-driven feed pump preposed pump under a deep frequency conversion working condition, which comprises a deaerator, wherein the water outlet end of the deaerator is connected with the steam-driven feed pump, and the front end of the steam-driven feed pump is provided with a frequency conversion device to ensure that the rotating speed of the preposed pump is synchronously reduced with the steam-driven feed pump.
Description
Technical Field
The invention belongs to the field of energy conservation and consumption reduction of coal-fired units, and relates to a speed regulating system for a non-coaxial steam-driven feed pump front-mounted pump under a deep frequency conversion working condition.
Background
The thermal power generating unit is further required to carry out deep peak shaving in the power grid, the generating load of the thermal power generating unit is reduced to be lower than 30% of the rated load, so that auxiliary equipment of the steam turbine is required to operate under a working condition far away from the design value, the operating environment of the equipment is poor, and the energy consumption of the auxiliary equipment is increased. For the current unit adopting the front pump and the steam feed pump with different shaft arrangements, the problems of increased energy consumption and damaged operation safety can be brought. If the front pump is coaxial with the steam-driven water-feeding pump, when the load is reduced, the rotating speed of the steam-driven water-feeding pump is reduced, the rotating speed of the front pump is further driven to be reduced, the flow and the lift of the front pump are reduced accordingly, the power consumption is reduced, and the radial thrust and the axial thrust of the rotating shaft of the front pump are reduced, so that the operation safety of the front pump is ensured. The non-coaxial front pumps are driven by single motors, the feed water pumps are driven by small steam turbines, the rotating speed of the feed water pumps is reduced along with the reduction of the unit load, and the flow and the lift are reduced accordingly. However, the front pump adopts a constant speed motor, so that the rotating speed is difficult to reduce when the load is reduced, the power change of the front pump is not large, the flow is reduced, the lift is increased, the radial thrust and the axial thrust of the rotating shaft of the front pump are greatly increased, and the operation safety and the operation service life of the front pump are influenced. Especially, under the background of the current requirement of large-amplitude peak shaving of the unit, the load of the unit is about to be reduced to be less than 30% of the rated load, so that the operating environment of the front-mounted pump is further severe.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a speed regulating system of a non-coaxial pneumatic feed pump front-mounted pump under a deep frequency conversion working condition, so as to solve the problems that the load of a unit is reduced and the operation safety and the operation service life of the front-mounted pump are influenced when the unit in the prior art carries out peak load regulation to a large extent.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a speed regulating system of a non-coaxial steam-driven feed pump preposed pump under a deep frequency conversion working condition is characterized by comprising a deaerator, wherein the deaerator is provided with two water outlet ends which are respectively connected to a preposed pump frequency conversion device A and a preposed frequency conversion device B;
the water outlet end of the A preposed frequency conversion device is connected to the A preposed pump, and the water outlet end of the A preposed pump is connected to the A steam-driven water feeding pump;
the water outlet end of the B preposed frequency conversion device is connected to the B preposed pump, and the water outlet end of the B preposed pump is connected to the B steam-driven water feeding pump;
the water outlet ends of the A steam-driven water feeding pump and the B steam-driven water feeding pump are converged and then are connected to the No. 3 high-pressure heater together.
The invention is further improved in that:
preferably, a front-mounted pump inlet stop valve A is arranged on a connecting pipeline between the deaerator and the front-mounted frequency conversion device A.
Preferably, a connection pipeline between the deaerator and the B preposed frequency conversion device is provided with a B preposed pump inlet stop valve.
Preferably, an A preposed pump outlet stop valve is arranged between the A preposed pump and the A steam-driven feed water pump.
Preferably, a branch is arranged on a connecting pipeline between the A preposed pump outlet stop valve and the A steam feed pump and is connected to the A feed pump small turbine.
Preferably, a connecting pipeline between the B preposed pump and the B steam-driven feed water pump is provided with a B preposed pump outlet stop valve.
Preferably, a branch is arranged on a connecting pipeline between the B preposed pump outlet stop valve and the B steam-driven water feeding pump, and the branch is connected to a small steam turbine of the B water feeding pump.
Preferably, the frequency conversion device of the front pump A is a front pump frequency converter or permanent magnet speed regulation equipment; the B preposed frequency conversion device is a preposed pump frequency converter or permanent magnet speed regulation equipment.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a speed regulating system of a non-coaxial steam-driven feed pump preposed pump under a deep frequency conversion working condition, which comprises a deaerator, wherein the water outlet end of the deaerator is connected with the steam-driven feed pump, and the front end of the steam-driven feed pump is provided with a frequency conversion device to ensure that the rotating speed of the preposed pump is synchronously reduced with the steam-driven feed pump.
Furthermore, an inlet stop valve is arranged between the deaerator and the front frequency conversion device, and water flow output from the deaerator to the No. 3 high-pressure heater is controlled.
Furthermore, each steam-driven water feeding pump is connected with a small water feeding pump turbine, and the small water feeding pump turbine is driven by the small water feeding pump turbine.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
wherein: 1. a deaerator; 2. a, a preposed pump inlet stop valve; 3. b, a front pump inlet stop valve; 4. a, a front pump frequency converter or permanent magnet speed regulation equipment is arranged; 5. b, a pump frequency converter or permanent magnet speed regulation equipment is arranged in front; 6. a, a front pump; 7. b, a front pump; 8. a, a preposed pump outlet stop valve is arranged; 9. b, a pump outlet stop valve is arranged in front; 10. a, feeding a small steam turbine of a water pump; 11. b, feeding a small steam turbine of the water pump; 12. a, a steam-driven water supply pump; 13. b, a steam-driven water supply pump; 14. and a No. 3 high-pressure heater.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention aims to provide a speed regulating system of a non-coaxial steam feed pump preposed pump under a deep frequency conversion working condition. Under the large background that the power grid further requires the thermal power generating unit to carry out deep peak shaving and the generating load of the unit is reduced to be below 30% of the rated load, the auxiliary machine of the thermal power generating unit operates in a section which is far away from the design working condition. For a water supply system with a pre-pump and a steam-driven water supply pump which are not coaxial, the power consumption of the pre-pump is increased during low-load operation, and the problems of operation safety and influenced service life are brought. By adding the variable frequency or permanent magnet speed regulation device to the front pump motor, the rotating speed of the front pump is regulated in real time along with the change of the rotating speed of the steam feed water pump, the lift is reduced while the flow is reduced, the power consumption of the front pump is reduced, and the operation safety and the service life of the front pump are improved.
The figure is a system schematic of the present invention, which is described in further detail in conjunction with fig. 1.
The invention discloses a speed regulating system of a non-coaxial steam-driven feed pump preposed pump under a deep frequency conversion working condition, which comprises a deaerator 1, wherein the deaerator 1 is provided with two water outlet ends, one water outlet end is connected to an A preposed pump inlet stop valve 2, the A preposed pump inlet stop valve 2 is connected with an A preposed frequency conversion device 4, the output end of the A preposed frequency conversion device 4 is connected with an A preposed pump 6, the output end of the A preposed pump 6 is connected with an A steam-driven feed pump 12, a preposed pump outlet stop valve 8 is arranged on a connecting pipeline between the A preposed pump 6 and the A steam-driven feed pump 12, and a branch is arranged on a connecting pipeline between the A preposed pump outlet stop valve 8 and the A steam-driven feed pump 12 and is connected with a feed pump small turbine 10.
Another play water end and the leading pump entry stop valve 3 of B of oxygen-eliminating device 1 are connected, leading pump entry stop valve 3 of B and the leading frequency conversion device 5 of B are connected, leading frequency conversion device 5 of B is connected, leading frequency conversion device 5's of B output and leading pump 7 of B are connected, leading pump 7 of B and the steam-driven feed pump 13 of B are connected, be provided with leading pump exit stop valve 9 of B on the connecting pipeline between leading pump 7 of B and the steam-driven feed pump 13 of B, be provided with the branch on the connecting pipeline between leading pump exit stop valve 9 of B and the steam-driven feed pump 13 of B, the branch is connected to the little turbine 11 of B feed pump.
The water outlet pipelines of the A steam-driven water feeding pump 12 and the B steam-driven water feeding pump 13 are converged and then are connected to the No. 3 high-pressure heater 14 together.
The A preposed frequency conversion device 4 and the B preposed frequency conversion device 5 are both preposed pump frequency converters or permanent magnet speed regulation equipment.
The working process of the invention is as follows:
the water supply is deoxidized and heated in the deaerator 1, enters the A preposed pump 6 and the B preposed pump 7 through the A preposed pump inlet stop valve 2 and the A preposed pump inlet stop valve 3 respectively, and the A preposed frequency conversion device 4 and the B preposed pump frequency conversion device 5 are added on the motors of the two preposed pumps, so that the variable rotating speed regulation of the preposed pumps is realized. After being pressurized in the two preposed pumps, the feed water respectively enters an A steam-driven feed water pump 12 and a B steam-driven feed water pump 13 through an A preposed pump outlet stop valve 8 and an A preposed pump outlet stop valve 9, the steam-driven feed water pumps are respectively driven by an A feed water pump small turbine 10 and a B feed water pump small turbine 11, and after being further pressurized in the steam-driven feed water pumps, the feed water is converged to a feed water main pipe and enters a No. 3 high-pressure heater 14.
The scheme is applied to a 1000MW ultra-supercritical, single intermediate reheating, single-shaft, four-cylinder four-steam-discharge and double-backpressure condensing unit for analysis by taking the scheme as an example:
table 1 technical specifications of the pre-pump and the main feed pump:
a comparison was made before and after the single pre-pump operating mode was modified at 50% rated load, as shown in table 2 below.
TABLE 2 comparison table before and after single preposed pump reconstruction
After the transformation, the power of a single front pump is reduced by 214kW, and the total power of the unit is reduced by 428kW due to the arrangement of two front pumps, so that good energy-saving benefit is brought. The necessary cavitation allowance of the main water-feeding pump is 68.44m, the head of the improved front-mounted pump is 105m under 50% of load, and the problem that the main water-feeding pump is not subject to cavitation is solved; after the transformation, because the rotational speed descends, the operating condition point of the front pump is close to the design condition point, the efficiency of the front pump is 81 percent and is far higher than 65 percent before the transformation, the front pump operates in a high-efficiency area, the thrust balance of the front pump is well improved, and the operation safety and the service life of the front pump are ensured.
Effect of putting into operation
By adding the variable frequency or permanent magnet speed regulation device to the front pump motor, the rotating speed of the front pump is regulated in real time along with the change of the rotating speed of the steam feed water pump, the lift is reduced while the flow is reduced, the power consumption of the front pump is reduced, and the operation safety and the service life of the front pump are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A speed regulating system of a non-coaxial steam-driven feed pump preposed pump under a deep frequency conversion working condition is characterized by comprising a deaerator (1), wherein the deaerator (1) is provided with two water outlet ends which are respectively connected to a preposed pump frequency conversion device A (4) and a preposed frequency conversion device B (5);
the water outlet end of the A preposed frequency conversion device (4) is connected to the A preposed pump (6), and the water outlet end of the A preposed pump (6) is connected to the A steam-driven water feeding pump (12);
the water outlet end of the B preposed frequency conversion device (5) is connected to the B preposed pump (7), and the water outlet end of the B preposed pump (7) is connected to the B steam-driven water feeding pump (13);
the water outlet ends of the A steam-driven water feeding pump (12) and the B steam-driven water feeding pump (13) are converged and then are connected to the No. 3 high-pressure heater (14).
2. The speed regulating system of the non-coaxial steam feed pump preposed pump under the deep frequency conversion working condition according to claim 1, characterized in that a connecting pipeline between the deaerator (1) and the A preposed frequency conversion device (4) is provided with the A preposed pump inlet stop valve (2).
3. The speed regulating system of the non-coaxial steam feed pump preposed pump under the deep frequency conversion working condition according to claim 1, characterized in that a connecting pipeline between the deaerator (1) and the B preposed frequency conversion device (5) is provided with a B preposed pump inlet stop valve (3).
4. The speed regulating system of the non-coaxial steam feed pump preposition pump under the deep frequency conversion working condition according to claim 1, characterized in that an A preposed pump outlet stop valve (8) is arranged between the A preposed pump (6) and the A steam feed pump (12).
5. The speed regulating system for the non-coaxial steam feed pump pre-pump under the deep frequency conversion working condition is characterized in that a branch is arranged on a connecting pipeline between the A pre-pump outlet stop valve (8) and the A steam feed pump (12), and the branch is connected to the A feed pump small turbine (10).
6. The speed regulating system of the non-coaxial steam feed pump preposition pump under the deep frequency conversion working condition according to claim 1, characterized in that a connecting pipeline between the B preposition pump (7) and the B steam feed pump (13) is provided with a B preposition pump outlet stop valve (9).
7. The speed regulating system for the non-coaxial steam feed pump pre-pump under the deep frequency conversion working condition according to claim 6, characterized in that a branch is arranged on a connecting pipeline between the B pre-pump outlet stop valve (9) and the B steam feed pump (13), and the branch is connected to the B feed pump small turbine (11).
8. The speed regulating system of the non-coaxial steam feed pump preposition pump under the deep frequency conversion working condition according to any one of the claims 1-7, characterized in that the A preposition pump frequency conversion device (4) is a preposition pump frequency converter or a permanent magnet speed regulating device; the preposed frequency conversion device (5) B is a preposed pump frequency converter or permanent magnet speed regulation equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110860018.9A CN113482900A (en) | 2021-07-28 | 2021-07-28 | Non-coaxial steam-driven feed pump preposed pump speed regulating system under deep frequency conversion working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110860018.9A CN113482900A (en) | 2021-07-28 | 2021-07-28 | Non-coaxial steam-driven feed pump preposed pump speed regulating system under deep frequency conversion working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113482900A true CN113482900A (en) | 2021-10-08 |
Family
ID=77944360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110860018.9A Pending CN113482900A (en) | 2021-07-28 | 2021-07-28 | Non-coaxial steam-driven feed pump preposed pump speed regulating system under deep frequency conversion working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113482900A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202991525U (en) * | 2012-11-16 | 2013-06-12 | 北京中电凯瑞控制技术有限公司 | Frequency conversion and energy conservation modified electrically-driven feed pump set mechanical system |
| CN205260334U (en) * | 2015-12-18 | 2016-05-25 | 广东粤电大埔发电有限公司 | Water pump system is given to 100% capacity steam -operating in large unit of power plant boiler |
| CN205638833U (en) * | 2016-05-24 | 2016-10-12 | 大唐淮北发电厂 | Energy -saving ultra -supercritical steam turbine unit gives water pump system |
| CN205858598U (en) * | 2016-08-08 | 2017-01-04 | 上海东方威尔节能技术有限公司 | Boiler feed pump energy-saving reconstruction structure |
| CN110081000A (en) * | 2019-04-22 | 2019-08-02 | 中国神华能源股份有限公司 | Generating set |
| CN111794936A (en) * | 2020-08-13 | 2020-10-20 | 刘亚辉 | Method for changing steam feed pump system into full frequency-conversion high-rotation-speed electric feed pump system and brand new logic control system thereof |
| CN213511251U (en) * | 2020-10-21 | 2021-06-22 | 西安热工研究院有限公司 | Non-coaxial drive steam feed pump set switching system of thermal power generating unit |
-
2021
- 2021-07-28 CN CN202110860018.9A patent/CN113482900A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202991525U (en) * | 2012-11-16 | 2013-06-12 | 北京中电凯瑞控制技术有限公司 | Frequency conversion and energy conservation modified electrically-driven feed pump set mechanical system |
| CN205260334U (en) * | 2015-12-18 | 2016-05-25 | 广东粤电大埔发电有限公司 | Water pump system is given to 100% capacity steam -operating in large unit of power plant boiler |
| CN205638833U (en) * | 2016-05-24 | 2016-10-12 | 大唐淮北发电厂 | Energy -saving ultra -supercritical steam turbine unit gives water pump system |
| CN205858598U (en) * | 2016-08-08 | 2017-01-04 | 上海东方威尔节能技术有限公司 | Boiler feed pump energy-saving reconstruction structure |
| CN110081000A (en) * | 2019-04-22 | 2019-08-02 | 中国神华能源股份有限公司 | Generating set |
| CN111794936A (en) * | 2020-08-13 | 2020-10-20 | 刘亚辉 | Method for changing steam feed pump system into full frequency-conversion high-rotation-speed electric feed pump system and brand new logic control system thereof |
| CN213511251U (en) * | 2020-10-21 | 2021-06-22 | 西安热工研究院有限公司 | Non-coaxial drive steam feed pump set switching system of thermal power generating unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11329583B2 (en) | Generalized frequency conversion system for steam turbine generator unit | |
| CN103291391B (en) | A kind of steam turbine power generation heating system with double-mode | |
| CN109322716B (en) | Gas-steam combined cycle high back pressure heat supply unit and rotor-changing non-stop combustion machine method | |
| CN103397917B (en) | The back pressure type small turbine drive feed-water pump of frequency conversion generator speed governing and method | |
| CN213478410U (en) | 25 MW-grade high-rotating-speed steam extraction condensing steam turbine | |
| CN114233416B (en) | Dynamically-reconstructed steam turbine generator unit and operation method | |
| CN113530615A (en) | BEST mini-machine system started in multiple modes and operation method thereof | |
| CN202948744U (en) | Water supply system adopting once-through steam generator reactor | |
| CN112343675A (en) | 25 MW-grade high-rotating-speed steam extraction condensing steam turbine | |
| WO2024108958A1 (en) | 60mw reaction intermediate-intake single-reheat air turbine and operation method | |
| CN112302740A (en) | BEST small steam turbine of novel million units | |
| CN213511251U (en) | Non-coaxial drive steam feed pump set switching system of thermal power generating unit | |
| CN113482900A (en) | Non-coaxial steam-driven feed pump preposed pump speed regulating system under deep frequency conversion working condition | |
| CN104405457B (en) | A kind of energy gradient utilization system of back pressure turbine heat supply | |
| CN103778984A (en) | Water supply system adopting once-through steam generator reactor | |
| CN203394697U (en) | Feed pump system driven by back pressure-type small steam turbine for speed regulation of variable frequency generator | |
| CN214091974U (en) | Device for driving feed pump by adopting main shaft of steam turbine | |
| CN213711120U (en) | Shaft seal system of small-sized steam turbine thermodynamic system | |
| CN201858163U (en) | Power plant large-scale unit boiler feed pump novel main shaft driving system | |
| CN219412767U (en) | Integral residual pressure recovery generator set with rear movable guide vanes | |
| CN212614904U (en) | Coaxial constant-speed water supply pump system | |
| CN217681879U (en) | Ultrahigh pressure 110MW steam turbine for solar photo-thermal power generation | |
| CN221032770U (en) | Low-parameter high-rotation-speed intermediate reheat steam turbine power generation system | |
| CN219571900U (en) | Feed pump system and thermal generator set | |
| CN113309586B (en) | Back pressure machine system and equipment driven by coupled power balance power generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211008 |
|
| RJ01 | Rejection of invention patent application after publication |