CN219713336U - Millions of unit water supply system - Google Patents
Millions of unit water supply system Download PDFInfo
- Publication number
- CN219713336U CN219713336U CN202222567143.3U CN202222567143U CN219713336U CN 219713336 U CN219713336 U CN 219713336U CN 202222567143 U CN202222567143 U CN 202222567143U CN 219713336 U CN219713336 U CN 219713336U
- Authority
- CN
- China
- Prior art keywords
- water supply
- pump
- water
- utility
- model
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 230000008020 evaporation Effects 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model discloses a water supply system of a million units, which comprises: a feed pump having a capacity corresponding to the maximum continuous evaporation capacity of the boiler; the BEST small machine is connected with the water supply pump and used for providing power for the water supply pump; the water inlet pipe is connected with the inlet end of the water supply pump; and the water supply pipe is connected to the outlet end of the water supply pump. The utility model can independently finish the water supply of the boiler by arranging the water supply pump equivalent to the maximum continuous evaporation capacity of the boiler, namely, the investment of equipment in a water supply system is reduced, and the workload in the installation and overhaul processes is reduced. Secondly, the problem that the water supply system in the prior art cannot provide enough power for the water supply pump in the utility model is solved, and the problem that the water supply pump in the utility model is driven by long-term electricity and the long-term cost is high is avoided.
Description
Technical Field
The utility model relates to the technical field of million units, in particular to a water supply system of a million units.
Background
The water supply system is the main artery of the thermal generator set and relates to the safe and economic operation of the whole generator set. At present, a water supply system in a water supply system is generally designed to adopt an electric water supply pump with 30 percent BMCR (maximum continuous evaporation capacity of a boiler) capacity and two steam-driven water supply pumps with 50 percent BMCR when a 1000MW grade ultra-supercritical unit put into production at home normally runs, and the two water supply systems are separately arranged. The steam-driven water supply is to deoxidize the condensed water by the deaerator, then boost the pressure by the water supply pump, heat the water supply by the high-pressure heater, and provide the water supply with a certain pressure and a certain temperature for the boiler.
However, the water supply system is complicated due to the fact that the electric water supply pump and the two sets of steam-driven water supply pumps are combined, investment is large, and workload is large during installation and maintenance.
Content of the application
Based on this, it is necessary to provide a water supply system for millions of units in order to solve the above-mentioned technical problems.
The million units water supply system comprises:
a feed pump having a capacity corresponding to the maximum continuous evaporation capacity of the boiler;
the BEST small machine is connected with the water supply pump and used for providing power for the water supply pump;
the water inlet pipe is connected with the inlet end of the water supply pump;
and the water supply pipe is connected to the outlet end of the water supply pump.
In some embodiments, the million units feedwater system further comprises:
and the inlet end and the outlet end of the pre-pump are communicated with the water supply pipe.
In some embodiments, the million units feedwater system further comprises:
and the generator is connected with the BEST small machine.
In some embodiments, the million units feedwater system further comprises:
and the exciter is arranged at the generator.
In some embodiments, the million units feedwater system further comprises:
and the connecting section is detachably arranged at the joint of the generator and the BEST small machine.
Compared with the prior art, the utility model has the beneficial effects that:
firstly, by arranging a water feed pump equivalent to the maximum continuous evaporation capacity of the boiler, water feed to the boiler can be independently completed, namely, the investment of equipment in a water feed system is reduced, and the workload in the installation and overhaul processes is reduced. Secondly, by introducing a BEST small machine to independently provide power for the water feed pump, the problem that the water feed pump in the utility model cannot be provided with enough power in the water feed system in the prior art is solved, and the problem that the water feed pump in the utility model is driven by long-term electricity and the long-term cost is high is avoided. Furthermore, by arranging the front-mounted pump, the pressure of the inlet of the water feed pump can be increased, cavitation of the water feed pump is prevented, and the service life of the water feed pump is prolonged. Finally, by arranging the generator, the exciter and the connecting section, the residual power after the BEST small machine drives the water supply pump can be reasonably utilized, namely the energy utilization rate of the utility model is improved, the exciter is used for improving the power generation efficiency of the generator, and the BEST small machine and the generator can be connected or disconnected according to the requirement through the connecting section, so that the flexibility of the utility model is improved.
Drawings
Fig. 1 is a schematic diagram of an exemplary embodiment of the present utility model.
In the figure: 1. a water feed pump; 2. a BEST mini; 3. a water inlet pipe; 4. a water supply pipe; 5. a pre-pump; 6. a generator; 7. an exciter; 8. and a connecting section.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As described in the background art, the water supply system is the main artery of the thermal generator set, and the safe and economic operation of the whole generator set is related. At present, a water supply system in a water supply system is generally designed to adopt an electric water supply pump with 30 percent BMCR (maximum continuous evaporation capacity of a boiler) capacity and two steam-driven water supply pumps with 50 percent BMCR when a 1000MW grade ultra-supercritical unit put into production at home normally runs, and the two water supply systems are separately arranged. The steam-driven water supply is to deoxidize the condensed water by the deaerator, then boost the pressure by the water supply pump, heat the water supply by the high-pressure heater, and provide the water supply with a certain pressure and a certain temperature for the boiler. However, the water supply system is complicated due to the fact that the electric water supply pump and the two sets of steam-driven water supply pumps are combined, investment is large, and workload is large during installation and maintenance.
In order to solve the above problems, the present utility model provides a water supply system for a million units, which mainly comprises: the utility model relates to a water supply pump 1, a BEST small machine 2, a water inlet pipe 3, a water supply pipe 4, a pre-pump 5, a generator 6, an exciter 7 and a connecting section 8, wherein the BEST small machine 2 is used for providing power for the water supply pump 1 and the generator 6, and the water supply pump 1 equivalent to the maximum continuous evaporation capacity of a boiler is arranged to independently complete water supply to the boiler, so that the purposes of reducing equipment investment in a water supply system and reducing the workload in the installation and maintenance process are achieved.
Specifically, in the exemplary embodiment, inlet tube 3 is fabricated from ductile iron. One end of the water inlet pipe 3 is connected with a deaerator of the generator 6 group, and the other end of the water inlet pipe is connected with the inlet end of the water feeding pump 1 so as to convey condensate water after deaeration of the deaerator. Further, the pre-pump 5 is arranged between the deaerator and the water feeding pump 1, the inlet end and the outlet end of the pre-pump 5 are communicated with the water feeding pipe 4, namely, condensed water after deaeration of the deaerator passes through the pre-pump 5 and then passes through the water feeding pump 1, the pre-pump 5 can provide a proper pressure head for the water feeding pump 1 so as to meet the requirement of the main pump on the net suction pressure head under different operation conditions, a certain margin is reserved, and meanwhile, the pre-pump 5 cannot be cavitation caused when operated under the minimum flow condition and the system load-reducing condition, and can also play a role in preventing the water feeding pump 1 from cavitation.
Specifically, in the exemplary embodiment, feed pipe 4 is made of ductile iron and is connected to an outlet end of feed pump 1.
Specifically, in the exemplary embodiment, the feed pump 1 with the capacity equivalent to the maximum continuous evaporation capacity of the boiler is selected to replace one 30% BMCR (maximum continuous evaporation capacity of the boiler) capacity electric feed pump 1 and two 50% BMCR steam feed pumps 1 in the prior art, so that the effects of reducing equipment investment in a water supply system and reducing the workload in the installation and maintenance process are achieved. Further, in the exemplary embodiment, feedwater pump 1 employs a HPT500-505-5S type multistage pump.
Specifically, in the exemplary embodiment, the BEST small machine 2 is connected to the water feed pump 1 to provide power for the water feed pump 1, and in the utility model, the BEST small machine 2 is provided to solve the problem that the water feed pump 1 in the utility model cannot be provided with enough power in the water feed system in the prior art, and avoid the problem that the water feed pump 1 in the utility model is driven by electricity for a long time and the long-term cost is high. Further, in the exemplary embodiment, BEST small machine 2 is embodied as a twin-machine backheat variable speed back pressure turbine.
Specifically, in the exemplary embodiment, generator 6 is connected to BEST small machine 2 to make the BEST use of the remaining power after BEST small machine 2 drives feed pump 1, thereby improving the energy utilization of the present utility model, and exciter 7 is disposed at generator 6, and its functions include: before the generator 6 is connected with the grid, regulating the terminal voltage output by the generator 6; after the generator 6 is connected with the grid, the reactive power born by the generator 6 is regulated; the static and dynamic stability of the parallel operation of the synchronous generator 6 is improved; (static stabilization: the adoption of a sensitive and rapid excitation regulating system can improve the stability of the generator 6 under small interference, dynamic stabilization: the adoption of a quick-response excitation regulating system with higher peak voltage can improve the stability of the generator 6 under large disturbance) when the generator 6 is in an accident, the rotor winding is rapidly de-excited, so that the safety of the generator 6 is protected.
Specifically, in the exemplary embodiment, connection section 8 is removably positioned at the junction of generator 6 and BEST mini-machine 2. Further, the connection section 8 is specifically a flange to coaxially connect the turbine rotor and the generator 6 rotor, thereby connecting or disconnecting the BEST small machine 2 and the generator 6 according to the requirement.
In summary, by providing the water feed pump 1 corresponding to the maximum continuous evaporation capacity of the boiler, water feed to the boiler can be independently completed, i.e. the investment of equipment in the water feed system is reduced, and the workload in the installation and maintenance process is reduced. Secondly, by introducing a BEST small machine 2 to independently provide power for the water feed pump 1, the problem that the water feed pump 1 in the utility model cannot be provided with enough power in the water feed system in the prior art is solved, and the problem that the water feed pump 1 in the utility model is driven by electricity for a long time and the long-term cost is high is avoided. Furthermore, by providing the front-mounted pump 5, the pressure at the inlet of the feed pump 1 can be increased, cavitation of the feed pump 1 can be prevented, and the service life of the utility model can be prolonged. Finally, by arranging the generator 6, the exciter 7 and the connecting section 8, the residual power after the BEST small machine 2 drives the water feeding pump 1 can be reasonably utilized, namely the energy utilization rate of the utility model is improved, the exciter 7 is used for improving the power generation efficiency of the generator 6, and the BEST small machine 2 and the generator 6 can be connected or disconnected according to the requirement through the connecting section 8, so that the flexibility of the utility model is improved.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. A million unit feed water system comprising at least:
a feed pump (1) having a capacity corresponding to the maximum continuous evaporation capacity of the boiler;
a BEST small machine (2) connected with the water feed pump (1) and used for providing power for the water feed pump (1);
a water inlet pipe (3) connected to the inlet end of the water feed pump (1);
and a water supply pipe (4) connected to the outlet end of the water supply pump (1).
2. The million-unit feed water system of claim 1, further comprising:
and the inlet end and the outlet end of the pre-pump (5) are communicated with the water supply pipe (4).
3. The million-unit feed water system of claim 1, further comprising:
-a generator (6) connected to said BEST mini-machine (2).
4. A million unit feed water system of claim 3, further comprising:
and an exciter (7) arranged at the generator (6).
5. A million unit feed water system of claim 3, further comprising:
and the connecting section (8) is detachably arranged at the joint of the generator (6) and the BEST small machine (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222567143.3U CN219713336U (en) | 2022-09-27 | 2022-09-27 | Millions of unit water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222567143.3U CN219713336U (en) | 2022-09-27 | 2022-09-27 | Millions of unit water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219713336U true CN219713336U (en) | 2023-09-19 |
Family
ID=87984003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222567143.3U Active CN219713336U (en) | 2022-09-27 | 2022-09-27 | Millions of unit water supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219713336U (en) |
-
2022
- 2022-09-27 CN CN202222567143.3U patent/CN219713336U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206267896U (en) | Combined cycle two-shipper condensing-back pressure formula is drawn gas cogeneration system | |
| CN113175363A (en) | Master pipe connection system for adjusting high-pressure cylinder to do work and operation method | |
| CN111058902A (en) | Energy-saving system and energy-saving control method based on industrial steam turbine asynchronous power generation | |
| CN114592928A (en) | BEST small-machine steam inlet and outlet system and steam outlet pressure control operation method thereof | |
| CN113431651A (en) | Low-load operation system with one furnace and two machines | |
| CN219713336U (en) | Millions of unit water supply system | |
| CN113756893A (en) | Multi-unit combined operation flexibility adjusting system among multiple power plants | |
| CN109869208A (en) | Steam generating system and the seawater desalination system for using the steam generating system | |
| CN116537899A (en) | Flexible peak shaving nuclear power unit adopting molten salt for energy storage and working method | |
| CN210485839U (en) | Heat supply system | |
| CN218495854U (en) | Ultrahigh-temperature ultrahigh-pressure dry quenching thermodynamic system with multiple furnaces and multiple machines | |
| CN201858163U (en) | Power plant large-scale unit boiler feed pump novel main shaft driving system | |
| CN106382620A (en) | Low-pressure water supply system for steam extraction and backheating of power station unit | |
| CN218151092U (en) | Thermal power plant steam turbine backpressure steam extraction energy cascade utilization system | |
| CN217055314U (en) | Double-machine regenerative generator connecting system based on four-quadrant frequency converter | |
| CN218095872U (en) | Single-machine operation quick start-stop system based on molten salt heat storage | |
| CN211372365U (en) | System is utilized to rich coal gas high efficiency of iron and steel enterprise | |
| CN217055315U (en) | Double-machine regenerative generator connecting system based on double-fed generator/motor | |
| CN220135442U (en) | Water inlet temperature control system of fused salt heat storage system | |
| CN219529104U (en) | Solar photo-thermal and thermal generator set coupled power generation system | |
| CN220134118U (en) | Industrial steam supply device based on molten salt energy storage | |
| CN217001994U (en) | High-parameter combined cycle super-power air cooling unit | |
| CN215109066U (en) | Natural gas distributed energy resource station based on heat accumulator | |
| CN114922704B (en) | Turbine unit power generation system capable of safely running under low load | |
| CN219605359U (en) | Bypass heating system based on BEST (fast operating test) small machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |