CN211853970U - Boiler water supply system based on gas and steam combined cycle unit - Google Patents
Boiler water supply system based on gas and steam combined cycle unit Download PDFInfo
- Publication number
- CN211853970U CN211853970U CN202020449353.0U CN202020449353U CN211853970U CN 211853970 U CN211853970 U CN 211853970U CN 202020449353 U CN202020449353 U CN 202020449353U CN 211853970 U CN211853970 U CN 211853970U
- Authority
- CN
- China
- Prior art keywords
- pressure
- water supply
- pressure water
- pump
- valve
- 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.)
- Withdrawn - After Issue
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 239000007789 gas Substances 0.000 claims abstract description 20
- 239000000498 cooling water Substances 0.000 claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 239000002918 waste heat Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The embodiment of the specification discloses a boiler water supply system based on a gas-steam combined cycle unit. The system comprises: high-pressure feed water valve, first high-pressure feed water pump, first fluid coupling ware, first spoon pipe, second high-pressure feed water pump, second fluid coupling ware, second spoon pipe, manual feed water valve, wherein: one side of the first high-pressure water supply pump is connected with a first hydraulic coupler, the other side of the first high-pressure water supply pump is connected with a high-pressure water supply valve, and the other side of the first hydraulic coupler is connected with a first scoop pipe; one side of a second high-pressure water supply pump is connected with a manual water supply valve, the other side of the second high-pressure water supply pump is connected with a second hydraulic coupler, and the other side of the second hydraulic coupler is connected with a second scoop pipe; the other end of the manual water supply valve is connected with a high-pressure water supply valve, one end of the high-pressure water supply valve is connected with a first high-pressure water supply pump and the manual water supply valve, and the other end of the high-pressure water supply valve is connected with a high-pressure steam drum of the waste heat boiler and a cooling water system main pipe of the gas turbine; three measuring points are arranged on a connecting pipeline in front of the high-pressure water supply valve and are respectively a first measuring point, a second measuring point and a third measuring point.
Description
Technical Field
The specification relates to the field of electromechanics, in particular to a boiler water supply system based on a gas-steam combined cycle unit.
Background
The high-pressure water feeding pump of the waste heat boiler of the gas-steam combined cycle two-in-one heat supply unit is generally configured to be one-in-one standby, the operating high-pressure water feeding pump scoop pipe is put into an automatic mode to control the high-pressure water feeding pressure, and the standby high-pressure water feeding pump scoop pipe is in a manual mode. The high-pressure feed pump scoop tube is used as a control object, the water pressure in front of a high-pressure feed valve is generally set as a single measuring point to obtain the pressure of the high-pressure feed pump, but if the measuring point is in fault or is interfered, the command of the high-pressure feed pump scoop tube is easily suddenly reduced, and the operation safety of a unit is seriously influenced.
Disclosure of Invention
The embodiment of the specification provides a boiler water supply system based on a gas-steam combined cycle unit, which is used for overcoming at least one technical problem in the prior art.
According to a first aspect of the embodiments of the present specification, there is provided a boiler feed water system based on a gas-steam combined cycle unit, comprising: high-pressure feed water valve, first high-pressure feed water pump, first fluid coupling ware, first spoon pipe, second high-pressure feed water pump, second fluid coupling ware, second spoon pipe, manual feed water valve, wherein:
one side of the first high-pressure water supply pump is connected with the first hydraulic coupler, the other side of the first high-pressure water supply pump is connected with the high-pressure water supply valve, one side of the first hydraulic coupler is connected with the first high-pressure water supply pump, and the other side of the first high-pressure water supply pump is connected with the first scoop pipe; one side of the second high-pressure water feeding pump is connected with the manual water feeding valve, the other side of the second high-pressure water feeding pump is connected with the second hydraulic coupler, one side of the second hydraulic coupler is connected with the second high-pressure water feeding pump, and the other side of the second hydraulic coupler is connected with the second scoop pipe; one end of the manual water feeding valve is connected with a second high-pressure water feeding pump, the other end of the manual water feeding valve is connected with the high-pressure water feeding valve, one end of the high-pressure water feeding valve is connected with the first high-pressure water feeding pump and the manual water feeding valve, and the other end of the high-pressure water feeding valve is connected with a high-pressure steam drum of the waste heat boiler and a cooling water system main pipe of the gas turbine; the pressure sensor comprises a high-pressure water supply valve, a pressure sensor and a pressure sensor, wherein three measuring points are arranged on a connecting pipeline in front of the high-pressure water supply valve, namely a first measuring point, a second measuring point and a third measuring point respectively, and the pressure sensor is arranged on the first measuring point, the second measuring point and the third measuring point.
Optionally, the first high-pressure feed water pump and the second high-pressure feed water pump are both electric speed regulating pumps.
Optionally, the first and second high-pressure feed pumps are each 100% capacity high-pressure feed pumps.
Optionally, the output ends of the pressure sensors on the first measuring point, the second measuring point and the third measuring point are connected with the three input ends of the median selector in a one-to-one mode.
The beneficial effects of the embodiment of the specification are as follows:
three measuring points are arranged on a connecting pipeline in front of the high-pressure water supply valve, an appropriate value is selected from measuring results of the three measuring points and then sent to the controller to participate in adjustment, the controller sends a control instruction to the scoop tube, and the oil inlet amount of the hydraulic coupler is adjusted through the scoop tube, so that the rotating speed of the high-pressure water supply pump is controlled. By arranging the three measuring points, the input value of the controller has no great deviation with the measured value, the controller outputs normally, and a sudden drop instruction can not be sent to the spoon pipe when the high-pressure steam drum and the gas turbine cooling water system are in water shortage, so that the water level of the high-pressure steam drum is maintained, the safe operation of the waste heat boiler is ensured, the normal cooling water requirement of the gas turbine cooling water system is ensured, the phenomenon that the gas turbine system oscillates due to the low water supply flow of the gas turbine cooling water system and even triggers the main protection cooling water system to trip due to the low water supply flow is avoided, the safe operation of the gas turbine is ensured, the influence of the sudden drop of the high-pressure water supply pump spoon pipe instruction caused by a single measuring point in the prior art on the whole gas-steam combined cycle.
The innovation points of the embodiment of the specification comprise:
1. three measuring points are arranged on a connecting pipeline in front of the high-pressure water supply valve, an appropriate value is selected from measuring results of the three measuring points and then sent to the controller to participate in adjustment, the controller sends a control instruction to the scoop tube, and the oil inlet amount of the hydraulic coupler is adjusted through the scoop tube, so that the rotating speed of the high-pressure water supply pump is controlled. By arranging the three measuring points, the input value of the controller does not have too large deviation with the measured value, the controller outputs normally, and a sudden drop instruction cannot be sent to the spoon pipe when the high-pressure steam drum and the gas turbine cooling water system are in water shortage, so that the water level of the high-pressure steam drum is maintained, the safe operation of the waste heat boiler is ensured, the normal cooling water requirement of the gas turbine cooling water system is ensured, the phenomenon that the gas turbine system oscillates due to the low water supply flow of the gas turbine cooling water system and even triggers the main protection cooling water system to trip due to low water supply flow is avoided, the safe operation of the gas turbine is ensured, the influence of the sudden drop of the high-pressure water supply pump spoon pipe instruction caused by a single measuring point in the prior art on the whole gas-steam combined cycle two-to-one heating unit is avoided, and.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present specification, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram illustrating an apparatus of a boiler water supply system based on a gas-steam combined cycle unit according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the present specification without any inventive step are within the scope of the present specification.
It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present specification and the drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the specification discloses a boiler water supply system based on a gas-steam combined cycle unit.
The following are detailed below.
Fig. 1 is a schematic diagram illustrating an apparatus of a boiler water supply system based on a gas-steam combined cycle unit according to an embodiment of the present disclosure. As shown in fig. 1, the system includes: high-pressure feed water valve, first high-pressure feed water pump, first fluid coupling ware, first spoon pipe, second high-pressure feed water pump, second fluid coupling ware, second spoon pipe, manual feed water valve, wherein:
one side of the first high-pressure water supply pump is connected with the first hydraulic coupler, the other side of the first high-pressure water supply pump is connected with the high-pressure water supply valve, one side of the first hydraulic coupler is connected with the first high-pressure water supply pump, and the other side of the first high-pressure water supply pump is connected with the first scoop pipe; one side of the second high-pressure water feeding pump is connected with the manual water feeding valve, the other side of the second high-pressure water feeding pump is connected with the second hydraulic coupler, one side of the second hydraulic coupler is connected with the second high-pressure water feeding pump, and the other side of the second hydraulic coupler is connected with the second scoop pipe; one end of the manual water feeding valve is connected with a second high-pressure water feeding pump, the other end of the manual water feeding valve is connected with the high-pressure water feeding valve, one end of the high-pressure water feeding valve is connected with the first high-pressure water feeding pump and the manual water feeding valve, and the other end of the high-pressure water feeding valve is connected with a high-pressure steam drum of the waste heat boiler and a cooling water system main pipe of the gas turbine; the pressure sensor comprises a high-pressure water supply valve, a pressure sensor and a pressure sensor, wherein three measuring points are arranged on a connecting pipeline in front of the high-pressure water supply valve, namely a first measuring point, a second measuring point and a third measuring point respectively, and the pressure sensor is arranged on the first measuring point, the second measuring point and the third measuring point.
Three measuring points are arranged on a connecting pipeline in front of the high-pressure water supply valve, an appropriate value is selected from measuring results of the three measuring points and then sent to the controller to participate in adjustment, the controller sends a control instruction to the scoop tube, and the oil inlet amount of the hydraulic coupler is adjusted through the scoop tube, so that the rotating speed of the high-pressure water supply pump is controlled. By arranging the three measuring points, the input value of the controller has no great deviation with the measured value, the controller outputs normally, and a sudden drop instruction can not be sent to the spoon pipe when the high-pressure steam drum and the gas turbine cooling water system are in water shortage, so that the water level of the high-pressure steam drum is maintained, the safe operation of the waste heat boiler is ensured, the normal cooling water requirement of the gas turbine cooling water system is ensured, the phenomenon that the gas turbine system oscillates due to the low water supply flow of the gas turbine cooling water system and even triggers the main protection cooling water system to trip due to the low water supply flow is avoided, the safe operation of the gas turbine is ensured, the influence of the sudden drop of the high-pressure water supply pump spoon pipe instruction caused by a single measuring point in the prior art on the whole gas-steam combined cycle.
In a specific embodiment, the output ends of the pressure sensors on the first measuring point, the second measuring point and the third measuring point are connected with three input ends of the median selector in a one-to-one mode. The median selector is used to compare the quality of the three station inputs with the difference between them, and the output of the median selector is the median of the three inputs as long as there is no quality or deviation alarm. Otherwise, the median selector will determine the best or most likely correct input or average of the inputs as the output value. The redundant method that the control object participates in the adjustment in the 'three-out-of-the-middle' process can avoid the problem of the adjustment misalignment caused by a problem measuring point to the greatest extent.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice this description.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solutions of the present specification, and not to limit them; although the present description has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present specification.
Claims (4)
1. A boiler feed water system based on a gas-steam combined cycle unit is characterized by comprising: high-pressure feed water valve, first high-pressure feed water pump, first fluid coupling ware, first spoon pipe, second high-pressure feed water pump, second fluid coupling ware, second spoon pipe, manual feed water valve, wherein:
one side of the first high-pressure water supply pump is connected with the first hydraulic coupler, the other side of the first high-pressure water supply pump is connected with the high-pressure water supply valve, one side of the first hydraulic coupler is connected with the first high-pressure water supply pump, and the other side of the first high-pressure water supply pump is connected with the first scoop pipe; one side of the second high-pressure water feeding pump is connected with the manual water feeding valve, the other side of the second high-pressure water feeding pump is connected with the second hydraulic coupler, one side of the second hydraulic coupler is connected with the second high-pressure water feeding pump, and the other side of the second hydraulic coupler is connected with the second scoop pipe; one end of the manual water feeding valve is connected with a second high-pressure water feeding pump, the other end of the manual water feeding valve is connected with the high-pressure water feeding valve, one end of the high-pressure water feeding valve is connected with the first high-pressure water feeding pump and the manual water feeding valve, and the other end of the high-pressure water feeding valve is connected with a high-pressure steam drum of the waste heat boiler and a cooling water system main pipe of the gas turbine; the pressure sensor comprises a high-pressure water supply valve, a pressure sensor and a pressure sensor, wherein three measuring points are arranged on a connecting pipeline in front of the high-pressure water supply valve, namely a first measuring point, a second measuring point and a third measuring point respectively, and the pressure sensor is arranged on the first measuring point, the second measuring point and the third measuring point.
2. The system of claim 1, wherein the first and second high-pressure feedwater pumps are electric speed pumps.
3. The system of claim 1, wherein the first and second high pressure feedwater pumps are each 100% capacity high pressure feedwater pumps.
4. The system of claim 1, wherein the pressure sensor outputs at the first, second and third stations are connected one-to-one to the three inputs of the median selector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020449353.0U CN211853970U (en) | 2020-03-31 | 2020-03-31 | Boiler water supply system based on gas and steam combined cycle unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020449353.0U CN211853970U (en) | 2020-03-31 | 2020-03-31 | Boiler water supply system based on gas and steam combined cycle unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211853970U true CN211853970U (en) | 2020-11-03 |
Family
ID=73143811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020449353.0U Withdrawn - After Issue CN211853970U (en) | 2020-03-31 | 2020-03-31 | Boiler water supply system based on gas and steam combined cycle unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211853970U (en) |
-
2020
- 2020-03-31 CN CN202020449353.0U patent/CN211853970U/en not_active Withdrawn - After Issue
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103791485A (en) | Optimal control method of water supply system of thermal power generating unit | |
| CN103628933B (en) | Realize the controlling method of Miniature steamer unit emergency protective system function | |
| US10132492B2 (en) | System and method for drum level control in a drum of a heat recovery steam generator | |
| CN105782948A (en) | Method for starting thermal power generating unit under recycling fault of turbine driven feed water pumps | |
| CN108153256B (en) | Multi-unit gas and steam combined cycle power station load control method | |
| CN211853970U (en) | Boiler water supply system based on gas and steam combined cycle unit | |
| CN112128734A (en) | Undisturbed switching control method for electric feed pump of subcritical unit of 135MW coal-fired drum furnace | |
| CN108716462B (en) | Speed maintaining device and system for nuclear power water feed pump set | |
| CN110159362B (en) | Steam turbine bypass control system | |
| CN104633457A (en) | Real-time online cavitation monitoring and warning system and real-time online cavitation monitoring and warning method for regulating valve of thermal power station | |
| US7562531B2 (en) | Method and system for operative reconversion of pairs of pre-existing steam turbo-units | |
| CN205714703U (en) | A kind of redundant measurement liquid-level type drainage pump full-automatic control system | |
| CN107013448A (en) | Method for controlling pump and supercharging device | |
| EP0155706A2 (en) | Method and apparatus for controlling an operation of plant | |
| CN114112200B (en) | Method for adjusting pipeline system for adjusting depressurization rate in boiler water overpressure experiment | |
| US5045272A (en) | Fluid temperature balancing system | |
| CN214119696U (en) | Mutually-communicated auxiliary steam system | |
| CN110264867B (en) | Steam generator secondary side dynamic characteristic test simulation device | |
| CN108443861B (en) | Energy-saving device for eliminating back pressure of closed condensate water recovery system | |
| RU2661578C1 (en) | Universal thermo-hydraulic distributor | |
| CN214425972U (en) | Boiler steam-water system based on gas-steam combined cycle unit | |
| CN214120805U (en) | Converter waste heat recovery steam supplementing system | |
| CN214247436U (en) | Steam supply device for plant | |
| CN215863337U (en) | Water supplement control system of heat supply unit | |
| CN214035807U (en) | Auxiliary steam system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20201103 Effective date of abandoning: 20231229 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20201103 Effective date of abandoning: 20231229 |