CN111594460A - Minimum flow control system of water feeding pump - Google Patents
Minimum flow control system of water feeding pump Download PDFInfo
- Publication number
- CN111594460A CN111594460A CN202010537239.8A CN202010537239A CN111594460A CN 111594460 A CN111594460 A CN 111594460A CN 202010537239 A CN202010537239 A CN 202010537239A CN 111594460 A CN111594460 A CN 111594460A
- Authority
- CN
- China
- Prior art keywords
- water supply
- module
- opening
- pump
- flow 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
Abstract
A minimum flow control system of a feed pump belongs to the field of flow control of a thermal power generation water supply system. The problem of current adopt continuous type control method to the large capacity unit often, make minimum flow valve can frequent action can increase valve fault rate and cause the fluctuation of feedwater flow is solved. The invention collects 3 water supply temperature values in a pipeline between a preposed pump and a water supply pump of a water supply system through a temperature collecting module; 3 water supply pressure values in a pipeline between a preposed pump and a water supply pump of the water supply system are acquired through a pressure acquisition module; the controller is used for obtaining 3 water supply pump inlet flow values according to the received 3 water supply temperature values and 3 water supply pressure values, and then obtaining a minimum flow valve control instruction according to the 3 water supply pump inlet flow values, wherein the minimum flow valve control instruction is used for controlling a minimum flow valve in a water supply system. The method is mainly used for controlling the minimum flow valve in the water supply system.
Description
Technical Field
The invention belongs to the field of flow control of a thermal power generation water supply system, and particularly relates to a minimum flow control system of a water supply pump based on a clearance characteristic function.
Background
The feed water pump is one of the important auxiliary machines of the thermal power generating unit, and the safety of the feed water pump is guaranteed to be directly related to the safety of the operation of the thermal power generating unit.
After the water feeding pump is started, when a water outlet valve is not opened or the external load is greatly reduced and when the unit runs at a low load, the water feeding flow is very small or zero, only a small amount of water or no water passes through the pump at this time, and the friction heat generated when the impeller of the water feeding pump runs can not be carried away by the water, so that the temperature in the pump is increased. When the temperature of the water feeding pump exceeds the saturation temperature of the water feeding pump under the pressure, the water feeding flowing into the water feeding pump is vaporized to form cavitation (the cavitation refers to the whole process that liquid is vaporized from the beginning, bubbles are formed, bubbles are developed to the bubble breakage, and equipment materials are damaged, and the cavitation damage to the water feeding pump is particularly serious.) in order to prevent the cavitation, when the water feeding flow of the water feeding pump is reduced to a certain degree, a minimum flow control valve on a recirculation pipe is opened to return a part of water to a deaerator, so that water in the water feeding pump passes through, heat generated by friction in the water feeding pump is taken away, and the temperature is not increased to vaporize the water feeding.
The control method of the minimum flow control valve is different according to different capacities of the thermal power generating unit. For a small-capacity unit, a switch-type control method is generally adopted, the switch-type control throttling loss is large, and the valve action stroke amplitude is large. And a continuous control method is usually adopted for a large-capacity unit, and the continuous control method mainly comprises a control method realized by adopting a PI (proportional integral) controller and a control method of a single broken line function.
When the PI controller is used for adjusting, although the safe and reliable operation of the water feeding pump can be ensured and the damage of the water feeding pump caused by cavitation can be prevented, the characteristic of continuous control of the PI controller determines that the minimum flow valve can frequently act along with the fluctuation of flow, and the probability of the valve failure is increased.
The single fold line function control method has large adjustment amplitude and frequent action on the minimum flow valve in the running process of the water feed pump, and easily causes the fluctuation of water feed flow at the moment of opening or closing the minimum flow valve, thereby influencing the automatic adjustment of water feed. Therefore, the above problems need to be solved.
Disclosure of Invention
The invention aims to solve the problems that the prior continuous control method is usually adopted for a large-capacity unit, the frequent action of a minimum flow valve can increase the failure rate of the valve and cause the fluctuation of the water supply flow, and provides a minimum flow control system and a minimum flow control method for a water supply pump.
A minimum flow control system of a water feeding pump comprises a temperature acquisition module, a pressure acquisition module and a controller;
the temperature acquisition module is used for acquiring 3 water supply temperature values in a pipeline between a preposed pump and a water supply pump of the water supply system and sending the water supply temperature values to the controller;
the pressure acquisition module is used for acquiring 3 water supply pressure values in a pipeline between a preposed pump and a water supply pump of the water supply system and sending the water supply pressure values to the controller;
and the controller is used for obtaining 3 water supply pump inlet flow values according to the received 3 water supply temperature values and 3 water supply pressure values, and obtaining a minimum flow valve control instruction according to the 3 water supply pump inlet flow values, wherein the minimum flow valve control instruction is used for controlling a minimum flow valve in a water supply system.
Preferably, the controller comprises a flow operation module, a median value taking module, a control flow valve opening function module, a control flow valve closing function module and an instruction generating module;
the flow calculation module is used for receiving 3 water supply temperature values sent by the temperature acquisition module and 3 water supply pressure values sent by the pressure acquisition module, extracting a middle value in the 3 received water supply temperature values, calculating the middle value temperature with the 3 water supply pressure values respectively to obtain 3 water supply pump inlet flow values, and sending the obtained 3 water supply pump inlet flow values to the median value acquisition module;
the median value taking module is used for extracting a median value from the 3 feed pump inlet flow values to serve as a feed pump inlet flow standard value at the current moment, and sending the feed pump inlet flow standard value at the current moment to the control flow valve opening function module and the control flow valve closing function module simultaneously;
the control flow valve opening function module is used for generating a first opening instruction at the current moment according to the received standard value of the inlet flow of the water supply pump at the current moment and sending the first opening instruction at the current moment to the instruction generating module;
the control flow valve closing function module is used for generating a second opening instruction at the current moment according to the received standard value of the inlet flow of the water supply pump at the current moment and sending the second opening instruction at the current moment to the instruction generating module;
and the instruction generating module is used for obtaining a minimum flow valve control instruction according to the two received first opening instructions and the two received second opening instructions at two adjacent moments.
Preferably, the instruction generating module comprises a small selection function module and a large selection function module;
the first input end of the small selection function module is connected with the output end of the control flow valve opening function module, the second input end of the small selection function module is connected with the output end of the large selection function module, the output end of the small selection function module is connected with the second input end of the large selection function module, and the output end of the small selection function module is used as a minimum flow valve control instruction output by the instruction generation module;
the first input end of the large selection function module is connected with the output end of the control flow valve closing function module;
the small selection function module compares a first opening instruction at the current moment received by a first input end of the small selection function module with an output result at the last moment output by an output end of the large selection function module, selects the minimum value of the first opening instruction and the last opening instruction to be sent to a second input end of the large selection function module, and simultaneously takes the selected minimum value as a minimum flow valve control instruction output by the instruction generation module;
and the large selection function module compares the second opening instruction at the current moment received by the first input end of the large selection function module with the last moment output result output by the output end of the small selection function module, and selects the maximum value of the two to send to the second input end of the small selection function module.
Preferably, the control flow valve opening function module adopts a function F1(x) Realizing that a function F is adopted by a control flow valve closing function module2(x) Implementation, and function F1(x) And function F2(x) Forming a gap characteristic function;
wherein the content of the first and second substances,
x represents the inlet flow standard value of the feed pump at the current moment;
F1(x) The opening instruction is output when the opening function of the control flow valve is increased along with the inlet flow of the feed pump;
F2(x) An opening command which represents the output when the closing function of the control flow valve is reduced along with the inlet flow of the feed pump;
Q1representing a function F2(x) When the opening instruction is a water supply pump inlet flow fixed value corresponding to full opening;
Q2representing a function F1(x) When the opening instruction is a water supply pump inlet flow fixed value corresponding to full opening;
Q3representing a function F2(x) The inlet flow constant value of the water feeding pump corresponds to the opening command when the opening command is fully closed;
Q4representing a function F1(x) And when the opening command is fully closed, the corresponding inlet flow rate fixed value of the feed water pump is obtained.
Preferably, the controller is further configured to acquire a real-time opening of the minimum flow valve.
The invention has the following beneficial effects: the minimum flow valve in the water supply system can be controlled according to the actually acquired inlet flow value of the water supply pump, the minimum flow valve does not act frequently in the application process, and only when the flow is increased or decreased, the minimum flow valve acts, so that the fluctuation of the water supply flow caused by the frequent action of the minimum flow valve is avoided, and further the automatic adjustment of the boiler water supply is influenced.
Drawings
FIG. 1 is a schematic diagram of a minimum flow control system for a feedwater pump according to the present invention;
FIG. 2 is a schematic diagram of the internal principles of the controller 300;
FIG. 3 is a function F1(x) And function F2(x) A graph of the relationship (c).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, the present embodiment is described, and the minimum flow control system of the feed pump in the present embodiment includes a temperature acquisition module 100, a pressure acquisition module 200, and a controller 300;
the temperature acquisition module 100 is used for acquiring 3 water supply temperature values in a pipeline between a preposed pump and a water supply pump of the water supply system and sending the water supply temperature values to the controller 300;
the pressure acquisition module 200 is used for acquiring 3 water supply pressure values in a pipeline between a preposed pump and a water supply pump of the water supply system and sending the water supply pressure values to the controller 300;
and the controller 300 is configured to obtain 3 feed water pump inlet flow values according to the received 3 feed water temperature values and 3 feed water pressure values, and obtain a minimum flow valve control instruction according to the 3 feed water pump inlet flow values, where the minimum flow valve control instruction is used to control a minimum flow valve in a feed water system.
In the embodiment, the minimum flow valve in the water supply system is controlled according to the actually acquired inlet flow value of the water supply pump, in the application process, the minimum flow valve does not act frequently, only when the flow is increased or decreased, the minimum flow valve acts, the fluctuation of the water supply flow caused by the frequent action of the minimum flow valve is avoided, and further the automatic boiler water supply regulation is influenced, on the other hand, due to the fact that data are acquired in real time, the flow change is continuous, the frequent action of the minimum flow valve caused by the small fluctuation of the inlet flow of the water supply pump can be overcome, and the probability of valve failure is reduced.
Further, referring specifically to fig. 2, the controller 300 includes a flow calculation module 310, a median module 320, a control flow valve opening function module 330, a control flow valve closing function module 340, and an instruction generation module 350;
the flow calculation module 310 is configured to receive 3 feedwater temperature values sent by the temperature acquisition module 100 and 3 feedwater pressure values sent by the pressure acquisition module 200, extract a median value of the received 3 feedwater temperature values, calculate the median value temperature with the 3 feedwater pressure values, obtain 3 feedwater pump inlet flow values, and send the obtained 3 feedwater pump inlet flow values to the median value taking module 320;
the median value taking module 320 is used for extracting a median value from the 3 feed pump inlet flow values as a feed pump inlet flow standard value at the current moment, and simultaneously sending the feed pump inlet flow standard value at the current moment to the control flow valve opening function module 330 and the control flow valve closing function module 340;
the control flow valve opening function module 330 is configured to generate a first opening instruction at the current time according to the received standard value of the inlet flow of the feed pump at the current time, and send the first opening instruction at the current time to the instruction generation module 350;
the control flow valve closing function module 340 is used for generating a second opening instruction at the current moment according to the received standard value of the inlet flow of the feed pump at the current moment and sending the second opening instruction at the current moment to the instruction generating module 350;
and the instruction generating module 350 is configured to obtain a minimum flow valve control instruction according to the two received first opening instructions and the two received second opening instructions at two adjacent moments.
In this embodiment, the entire process of the controller 300 is simple to operate.
Further, referring specifically to fig. 2, the instruction generating module 350 includes a small selection function module 351 and a large selection function module 352;
a first input end of the small selection function module 351 is connected with an output end of the control flow valve opening function module 330, a second input end of the small selection function module 351 is connected with an output end of the large selection function module 352, an output end of the small selection function module 351 is connected with a second input end of the large selection function module 352, and an output end of the small selection function module 351 serves as a minimum flow valve control instruction output by the instruction generation module 350;
a first input of the big select function module 352 is connected to an output of the control flow valve close function module 340;
the small selection function module 351 compares the first opening degree instruction at the current moment received by the first input end of the small selection function module with the last moment output result output by the output end of the large selection function module 352, selects the minimum value of the first opening degree instruction and the last moment output result to be sent to the second input end of the large selection function module 352, and simultaneously takes the selected minimum value as the minimum flow valve control instruction output by the instruction generation module 350;
the large selection function module 352 compares the second opening degree instruction at the current time received by the first input end thereof with the last time output result output by the output end of the small selection function module 351, and selects the maximum value of the two to send to the second input end of the small selection function module 351.
In the preferred embodiment, a specific structure of the instruction generating module 350 is given, which is simple and easy to implement.
Further, with specific reference to FIGS. 2 and 3, the control flow valve opening function module 330 utilizes a function F1(x) To accomplish this, the control flow valve closing function block 340 employs a function F2(x) Implementation, and function F1(x) And function F2(x) Forming a gap characteristic function;
wherein the content of the first and second substances,
x represents the inlet flow standard value of the feed pump at the current moment;
F1(x) The opening instruction is output when the opening function of the control flow valve is increased along with the inlet flow of the feed pump;
F2(x) An opening command which represents the output when the closing function of the control flow valve is reduced along with the inlet flow of the feed pump;
Q1representing a function F2(x) When the opening instruction is a water supply pump inlet flow fixed value corresponding to full opening;
Q2representing a function F1(x) When the opening instruction is a water supply pump inlet flow fixed value corresponding to full opening;
Q3representing a function F2(x) The inlet flow constant value of the water feeding pump corresponds to the opening command when the opening command is fully closed;
Q4representing a function F1(x) And when the opening command is fully closed, the corresponding inlet flow rate fixed value of the feed water pump is obtained.
Further, referring specifically to fig. 2, the controller 300 is also configured to collect the real-time opening of the minimum flow valve.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (5)
1. The minimum flow control system of the water feeding pump is characterized by comprising a temperature acquisition module (100), a pressure acquisition module (200) and a controller (300);
the temperature acquisition module (100) is used for acquiring 3 water supply temperature values in a pipeline between a preposed pump and a water supply pump of the water supply system and sending the water supply temperature values to the controller (300);
the pressure acquisition module (200) is used for acquiring 3 feed water pressure values in a pipeline between a preposed pump and a feed water pump of the water supply system and sending the values to the controller (300);
and the controller (300) is used for obtaining 3 water supply pump inlet flow values according to the received 3 water supply temperature values and 3 water supply pressure values, and obtaining a minimum flow valve control instruction according to the 3 water supply pump inlet flow values, wherein the minimum flow valve control instruction is used for controlling a minimum flow valve in a water supply system.
2. A feedwater pump minimum flow control system as claimed in claim 1 wherein the controller (300) comprises a flow calculation module (310), a median value module (320), a control flow valve opening function module (330), a control flow valve closing function module (340) and a command generation module (350);
the flow operation module (310) is used for receiving 3 water supply temperature values sent by the temperature acquisition module (100) and 3 water supply pressure values sent by the pressure acquisition module (200), extracting a middle value in the received 3 water supply temperature values, operating the middle value temperature with the 3 water supply pressure values respectively to obtain 3 water supply pump inlet flow values, and sending the obtained 3 water supply pump inlet flow values to the median value taking module (320);
the median value taking module (320) is used for extracting a median value from the 3 feed pump inlet flow values to serve as a feed pump inlet flow standard value at the current moment, and sending the feed pump inlet flow standard value at the current moment to the control flow valve opening function module (330) and the control flow valve closing function module (340) at the same time;
the control flow valve opening function module (330) is used for generating a first opening instruction at the current moment according to the received standard value of the inlet flow of the water supply pump at the current moment and sending the first opening instruction at the current moment to the instruction generating module (350);
the control flow valve closing function module (340) is used for generating a second opening instruction at the current moment according to the received standard value of the inlet flow of the water feed pump at the current moment and sending the second opening instruction at the current moment to the instruction generating module (350);
and the instruction generating module (350) is used for obtaining a minimum flow valve control instruction according to the two received first opening instructions and the two received second opening instructions at two adjacent moments.
3. A feedwater pump minimum flow control system as claimed in claim 2 wherein the command generation module (350) comprises a small selection function (351) and a large selection function (352);
a first input end of the small selection function module (351) is connected with an output end of the control flow valve opening function module (330), a second input end of the small selection function module (351) is connected with an output end of the large selection function module (352), an output end of the small selection function module (351) is connected with a second input end of the large selection function module (352), and an output end of the small selection function module (351) is used as a minimum flow valve control instruction output by the instruction generation module (350);
a first input end of the large selection function module (352) is connected with an output end of the control flow valve closing function module (340);
the small selection function module (351) compares a first opening instruction at the current moment received by a first input end of the small selection function module with an output result at the last moment output by an output end of the large selection function module (352), selects the minimum value of the first opening instruction and the last opening instruction to be sent to a second input end of the large selection function module (352), and simultaneously takes the selected minimum value as a minimum flow valve control instruction output by the instruction generation module (350);
and the large selection function module (352) compares the second opening degree instruction of the current moment received by the first input end of the large selection function module with the last moment output result output by the output end of the small selection function module (351), and selects the maximum value of the two to send to the second input end of the small selection function module (351).
4. A feedwater pump minimum flow control system as claimed in claim 2 wherein said control flow valve opening function module (330) employs function F1(x) The function F is adopted by a control flow valve closing function module (340)2(x) Implementation, and function F1(x) And function F2(x) Forming a gap characteristic function;
wherein the content of the first and second substances,
x represents the inlet flow standard value of the feed pump at the current moment;
F1(x) The opening instruction is output when the opening function of the control flow valve is increased along with the inlet flow of the feed pump;
F2(x) An opening command which represents the output when the closing function of the control flow valve is reduced along with the inlet flow of the feed pump;
Q1representing a function F2(x) When the opening instruction is a water supply pump inlet flow fixed value corresponding to full opening;
Q2representing a function F1(x) When the opening instruction is a water supply pump inlet flow fixed value corresponding to full opening;
Q3representing a function F2(x) The inlet flow constant value of the water feeding pump corresponds to the opening command when the opening command is fully closed;
Q4representing a function F1(x) And when the opening command is fully closed, the corresponding inlet flow rate fixed value of the feed water pump is obtained.
5. A feedwater pump minimum flow control system as claimed in claim 1 wherein the controller (300) is further configured to gather the real time opening of the minimum flow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010537239.8A CN111594460B (en) | 2020-06-12 | 2020-06-12 | Minimum flow control system of water feeding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010537239.8A CN111594460B (en) | 2020-06-12 | 2020-06-12 | Minimum flow control system of water feeding pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111594460A true CN111594460A (en) | 2020-08-28 |
| CN111594460B CN111594460B (en) | 2022-04-15 |
Family
ID=72184396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010537239.8A Active CN111594460B (en) | 2020-06-12 | 2020-06-12 | Minimum flow control system of water feeding pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111594460B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201560920U (en) * | 2009-06-11 | 2010-08-25 | 东北电力科学研究院有限公司 | Automatic variable-speed water feeding pump |
| CN103712199A (en) * | 2013-12-19 | 2014-04-09 | 中国能源建设集团广东省电力设计研究院 | Anti-cavitation device of injection type boiler water feeding pump and use method thereof |
| CN104632600A (en) * | 2014-08-27 | 2015-05-20 | 国家电网公司 | Control method for minimum flow recirculation valve of water feed pump |
| CN107061370A (en) * | 2017-06-22 | 2017-08-18 | 哈尔滨广瀚新能动力有限公司 | A kind of utilization fore pump solves the device and its application method of ORC electricity generation system pump cavitations |
| CN206786697U (en) * | 2017-05-15 | 2017-12-22 | 山东电力基本建设总公司 | Feedwater recirculating system |
| CN107543142A (en) * | 2017-09-06 | 2018-01-05 | 浙江大唐乌沙山发电有限责任公司 | A kind of supercritical DC Benson boiler depth peak regulation optimal control method |
| CN108591041A (en) * | 2018-07-06 | 2018-09-28 | 华能国际电力股份有限公司 | Minimum Flowrate of Feed Pump recycle valve control system and method |
-
2020
- 2020-06-12 CN CN202010537239.8A patent/CN111594460B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201560920U (en) * | 2009-06-11 | 2010-08-25 | 东北电力科学研究院有限公司 | Automatic variable-speed water feeding pump |
| CN103712199A (en) * | 2013-12-19 | 2014-04-09 | 中国能源建设集团广东省电力设计研究院 | Anti-cavitation device of injection type boiler water feeding pump and use method thereof |
| CN104632600A (en) * | 2014-08-27 | 2015-05-20 | 国家电网公司 | Control method for minimum flow recirculation valve of water feed pump |
| CN206786697U (en) * | 2017-05-15 | 2017-12-22 | 山东电力基本建设总公司 | Feedwater recirculating system |
| CN107061370A (en) * | 2017-06-22 | 2017-08-18 | 哈尔滨广瀚新能动力有限公司 | A kind of utilization fore pump solves the device and its application method of ORC electricity generation system pump cavitations |
| CN107543142A (en) * | 2017-09-06 | 2018-01-05 | 浙江大唐乌沙山发电有限责任公司 | A kind of supercritical DC Benson boiler depth peak regulation optimal control method |
| CN108591041A (en) * | 2018-07-06 | 2018-09-28 | 华能国际电力股份有限公司 | Minimum Flowrate of Feed Pump recycle valve control system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111594460B (en) | 2022-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203404771U (en) | Frequency converter and adjusting valve control system of condensate water system | |
| CN110735676B (en) | Coal-fired unit flexibility adjusting system and adjusting method adopting water replenishing tank | |
| CN103117101A (en) | Start-stop auxiliary device used in integral reactor and cold starting method of integral reactor | |
| CN109857033A (en) | Condensate throttling switching control method, device and computer equipment | |
| CN111594460B (en) | Minimum flow control system of water feeding pump | |
| CN108167036A (en) | A kind of system and method for nuclear power generating sets vapor self | |
| CN207776920U (en) | A kind of system of nuclear power generating sets vapor self | |
| CN212029680U (en) | Small-flow heat supply system of extraction condensing heat supply steam turbine | |
| CN112197252A (en) | Main steam heating system with steam supply bypass | |
| CN209780978U (en) | steam extraction and heat supply system of steam turbine unit | |
| CN110159362A (en) | A kind of turbine by-pass control system | |
| CN215259733U (en) | Dry-wet state undisturbed switching system suitable for supercritical unit under deep peak regulation state | |
| CN209944297U (en) | Thermodynamic system of power plant | |
| CN102313275B (en) | Thermal power energy-saving process and system | |
| CN114837757A (en) | Thermal power plant high-pressure feed water bypass frequency modulation system with steam ejector and working method | |
| CN208431039U (en) | Energy-saving heating unit | |
| CN215336605U (en) | Cavitation-resistant system for heat supply network drainage pump | |
| CN220267793U (en) | Wide-load peak regulation system for auxiliary peak regulation of electrode boiler | |
| CN207992830U (en) | A kind of condensed water primary frequency modulation optimization system | |
| CN216409079U (en) | Heat supply system | |
| CN210123154U (en) | Efficient closed thermal deaerator control device | |
| CN213955270U (en) | Main steam heating system with steam supply bypass | |
| CN216693486U (en) | Waste incineration power generation and heat supply co-production system with peak regulation capability | |
| CN218357415U (en) | Continuous flash steam recovery energy-saving system | |
| CN114263505B (en) | System and method for improving primary frequency modulation performance of reheat unit |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |