CN113153467A - Depth peak regulation system based on thermodynamic system coupling among units and operation method thereof - Google Patents

Depth peak regulation system based on thermodynamic system coupling among units and operation method thereof Download PDF

Info

Publication number
CN113153467A
CN113153467A CN202110298131.2A CN202110298131A CN113153467A CN 113153467 A CN113153467 A CN 113153467A CN 202110298131 A CN202110298131 A CN 202110298131A CN 113153467 A CN113153467 A CN 113153467A
Authority
CN
China
Prior art keywords
pressure cylinder
steam
isolation valve
valve group
generator set
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
Application number
CN202110298131.2A
Other languages
Chinese (zh)
Inventor
赵杰
王伟峰
刘振琪
杜文斌
王昭
杨可
何欣欣
王兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Thermal Power Research Institute Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xian Thermal Power Research Institute Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN202110298131.2A priority Critical patent/CN113153467A/en
Publication of CN113153467A publication Critical patent/CN113153467A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D13/00—Combinations of two or more machines or engines
    • F01D13/02—Working-fluid interconnection of machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/006—Auxiliaries or details not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K21/00—Steam engine plants not otherwise provided for

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention relates to a depth peak-shaving system based on thermodynamic system coupling among units and an operation method thereof, wherein the system comprises two high-pressure main steam valves, two high-pressure cylinders, two intermediate-pressure cylinders, two low-pressure cylinders, two condensate pumps, two intermediate-pressure cylinder steam exhaust control and isolation valve groups, a main steam connecting pipe control and isolation valve group, an intermediate-pressure cylinder steam exhaust connecting pipe control and isolation valve group, a low-pressure water supply connecting pipe control and isolation valve group, two high and intermediate-pressure cylinder minimum cooling steam inlet pipeline control and isolation valve groups, two low-pressure cylinder minimum cooling steam pipeline control and isolation valve groups, a main steam connecting pipe, an intermediate-pressure cylinder steam exhaust connecting pipe, a low-pressure water supply connecting pipe, two high and intermediate-pressure cylinder minimum cooling steam inlet pipelines and two low-pressure cylinder minimum cooling steam pipelines; the operation method realizes the flexible switching of two groups of conventional unit generator sets. According to the invention, the deep peak regulation capability of the unit can be improved without carrying out technical modification on the boiler side, and the flexibility of the unit operation is increased.

Description

Depth peak regulation system based on thermodynamic system coupling among units and operation method thereof
Technical Field
The invention belongs to the technical field of thermal power generation, and particularly relates to a deep peak shaving system based on thermal system coupling among units and an operation method thereof.
Background
At present, a unit system operation method is widely adopted in domestic large-capacity thermal power plants, namely, a boiler supplies steam for a steam turbine, and the steam turbine drives a generator to generate electricity, so that an independent power generation unit of the boiler, the steam turbine and the generator is formed. And the power generation units are basically not in transverse connection. The minimum electric load of the existing thermal power generating unit is generally limited to about 30-40% due to the limitation of the minimum stable combustion output of the auxiliary fuel which is not put into the coal-fired boiler, and the safe and continuous operation of the boiler is adversely affected if the minimum electric load is continuously reduced. Chinese patent publication CN109653810A discloses a thermodynamic system with two machines switching operation in one furnace, which is characterized in that a superheated steam and reheated steam bypass and a control valve are added, when one boiler fails, the other boiler is used to drive two steam turbines to generate electricity, at this time, the set has a certain peak shaving capability, but the system is complex in arrangement, low in operation flexibility, and poor in operability in actual operation of a power plant.
In recent years, with the continuous promotion of upgrading and transforming work of thermal power generating units, a thermodynamic system capable of realizing coupling connection among high-capacity thermal power generating units and an operation method thereof are urgently needed to enhance the flexibility of the thermal power generating units for adapting to electric load dispatching instructions and improve the deep peak regulation capacity of the thermal power generating units.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a deep peak regulation system based on thermodynamic system coupling among units and an operation method thereof, which can improve the deep peak regulation capability of the units and increase the flexibility of unit operation without carrying out technical modification on a boiler side.
The invention is realized by the following technical scheme:
a depth peak regulation system based on thermodynamic system coupling among units comprises a first conventional unit-system generator set and a second conventional unit-system generator set;
the system comprises a first high-pressure main valve, a second high-pressure main valve, a first high-pressure cylinder, a second high-pressure cylinder, a first intermediate pressure cylinder, a second intermediate pressure cylinder, a first low-pressure cylinder, a second low-pressure cylinder, a first condensate pump, a second condensate pump, a first intermediate pressure cylinder steam exhaust control, an isolation valve group, a second intermediate pressure cylinder steam exhaust control, an isolation valve group, a main steam communication pipe control, an isolation valve group, an intermediate pressure cylinder steam exhaust communication pipe control, an isolation valve group, a low-pressure water supply communication pipe control, an isolation valve group, a first high-pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group, a second high-pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group, a first low-pressure cylinder minimum cooling steam pipeline control, an isolation valve group, a second low-pressure cylinder minimum cooling steam pipeline control, an isolation valve group, a main steam communication pipe, an intermediate pressure cylinder steam supply steam exhaust communication pipe, a low-pressure cylinder minimum cooling steam inlet communication pipe, the minimum cooling steam inlet pipeline of the first high pressure cylinder, the minimum cooling steam inlet pipeline of the middle pressure cylinder, the minimum cooling steam inlet pipeline of the second high pressure cylinder and the minimum cooling steam inlet pipeline of the middle pressure cylinder, the minimum cooling steam pipeline of the first low pressure cylinder and the minimum cooling steam pipeline of the second low pressure cylinder;
the intermediate pressure cylinder steam exhaust connecting pipe is connected between a steam exhaust outlet of a first intermediate pressure cylinder and a steam exhaust outlet of a second intermediate pressure cylinder of the two turbines, and an intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group is installed on the intermediate pressure cylinder steam exhaust connecting pipe;
the main steam connecting pipe is connected between the steam inlet of a first high-pressure main throttle valve and the steam inlet of a second high-pressure main throttle valve of the two turbines, and a main steam connecting pipe control and isolation valve group is installed on the main steam connecting pipe;
the first intermediate pressure cylinder steam exhaust control and isolation valve group is connected between a steam exhaust port of the first intermediate pressure cylinder and a steam inlet of the first low pressure cylinder, and the second intermediate pressure cylinder steam exhaust control and isolation valve group is connected between a steam exhaust port of the second intermediate pressure cylinder and a steam inlet of the second low pressure cylinder;
a first low-pressure cylinder minimum cooling steam pipeline is connected between the inlet and the outlet of the first intermediate-pressure cylinder steam exhaust control and isolation valve group, a second low-pressure cylinder minimum cooling steam pipeline is connected between the inlet and the outlet of the second intermediate-pressure cylinder steam exhaust control and isolation valve group, a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group is installed on the first low-pressure cylinder minimum cooling steam pipeline, and a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group is installed on the second low-pressure cylinder minimum cooling steam pipeline;
the minimum cooling steam inlet pipeline of the first high-pressure and medium-pressure cylinder is connected between the inlet and the outlet of the first high-pressure main throttle valve, the minimum cooling steam inlet pipeline of the second high-pressure and medium-pressure cylinder is connected between the inlet and the outlet of the second high-pressure main throttle valve, the minimum cooling steam inlet pipeline of the first high-pressure and medium-pressure cylinder is provided with a first minimum cooling steam inlet pipeline control and isolation valve group, and the minimum cooling steam inlet pipeline of the second high-pressure and medium-pressure cylinder is provided with a second minimum cooling steam inlet pipeline control and isolation valve group;
the low-pressure water supply connecting pipe is connected between the outlet of the first condensate pump and the outlet of the second condensate pump of the two turbines, and a low-pressure water supply connecting pipe control and isolation valve group is installed on the low-pressure water supply connecting pipe;
the main steam of the first conventional unit-system generator set can enter a second high-pressure cylinder and a second intermediate-pressure cylinder of the second conventional unit-system generator set through the main steam communication pipe to do work, and the main steam of the second conventional unit-system generator set can enter a first high-pressure cylinder and a first intermediate-pressure cylinder of the first conventional unit-system generator set through the main steam communication pipe to do work.
The invention further improves that the first conventional unit generator set and the second conventional unit generator set have the same power generation capacity and equivalent capacity, and the equipment type and the thermodynamic system are designed in a consistent way.
The invention is further improved in that the first conventional unit generator set and the second conventional unit generator set are in an operating state in which both the boiler and the steam turbine are in an operating state.
The invention has the further improvement that when the second high-pressure main steam valve of the second conventional unit-system generator set is closed, the main steam of the second conventional unit-system generator set can enter the second high-pressure cylinder and the second intermediate-pressure cylinder through the minimum cooling steam inlet pipelines of the second high-pressure cylinder and the second intermediate-pressure cylinder, so that the safe operation of the second high-pressure cylinder and the second intermediate-pressure cylinder is ensured;
when a first high-pressure main steam valve of the first conventional unit system generator set is closed, main steam of the first conventional unit system generator set can enter the first high-pressure cylinder and the first intermediate-pressure cylinder through the minimum cooling steam inlet pipeline of the first high-pressure cylinder and the first intermediate-pressure cylinder, and safe operation of the first high-pressure cylinder and the first intermediate-pressure cylinder is guaranteed.
The invention has the further improvement that the exhaust steam of a first intermediate pressure cylinder of the first conventional unit-made generator set can enter a second low pressure cylinder of a second conventional unit-made generator set to do work through an exhaust steam connecting pipe of the intermediate pressure cylinder;
the second intermediate pressure cylinder exhaust steam of the second conventional unit-made generator set can enter the first low pressure cylinder of the first conventional unit-made generator set to do work through the intermediate pressure cylinder exhaust steam communication pipe.
The invention has the further improvement that condensed water at the outlet of a first condensed water pump of the first conventional unit-made generating set enters a low-pressure water supply system of a second conventional unit-made generating set through a low-pressure water supply connecting pipe so as to maintain the water level of a deaerator of the second conventional unit-made generating set to be stable;
and the condensed water at the outlet of the second condensed water pump of the second conventional unit generator set enters the low-pressure water supply system of the first conventional unit generator set through the low-pressure water supply connecting pipe so as to maintain the water level of the deaerator of the first conventional unit generator set to be stable.
The invention has the further improvement that when the second intermediate pressure cylinder steam exhaust control and the isolating valve group of the second conventional unit-made generator set are closed, part of intermediate pressure cylinder steam exhaust of the second conventional unit-made generator set enters the second low pressure cylinder through the second low pressure cylinder minimum cooling steam pipeline to cool the low pressure cylinder, so that the safe operation of the second low pressure cylinder is ensured;
when the first intermediate pressure cylinder steam exhaust control and the isolation valve group of the first conventional unit-made generator set are closed, part of intermediate pressure cylinder steam exhaust of the first conventional unit-made generator set enters the first low pressure cylinder through the first low pressure cylinder minimum cooling steam pipeline to cool the low pressure cylinder, and the safe operation of the first low pressure cylinder is ensured.
An operation method of an inter-unit depth peak-shaving system based on thermodynamic system coupling is based on the inter-unit depth peak-shaving system based on thermodynamic system coupling, and comprises the following steps:
step 1, a first conventional unit-made generator set and a second conventional unit-made generator set run normally, and a high-first high-pressure main throttle and a second high-pressure main throttle keep normal running states; the main steam connecting pipe control and isolation valve group of the main steam connecting pipe is in a closed state; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group of the intermediate pressure cylinder steam exhaust connecting pipe is in a closed state; the low-pressure water supply connecting pipe control and isolation valve group of the low-pressure water supply connecting pipe is in a closed state; a first intermediate pressure cylinder steam exhaust control and isolation valve group of a first conventional unit-system generator set is in an open state; the minimum cooling steam inlet pipeline of a first high pressure cylinder and a first medium pressure cylinder of the first conventional unit-system generator set is controlled, and an isolation valve group is in a closed state; a first low-pressure cylinder minimum cooling steam pipeline of a first conventional unit-system generator set controls and an isolation valve group to be in a closed state; a second intermediate pressure cylinder steam exhaust control and isolation valve group of a second conventional unit-system generator set is in an open state; the minimum cooling steam inlet pipeline of a second high pressure cylinder and a second medium pressure cylinder of the second conventional unit-system generator set is controlled, and the isolation valve group is in a closed state; a second low-pressure cylinder minimum cooling steam pipeline of a second conventional unit-system generator set controls and an isolation valve group to be in a closed state;
step 2, opening a main steam connection pipe control and isolation valve group of the main steam connection pipe; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group of the intermediate pressure cylinder steam exhaust connecting pipe is opened; a first high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group of a first conventional unit system generator set is opened; a first low-pressure cylinder minimum cooling steam pipeline of a first conventional unit-system generator set is controlled, and an isolation valve group is opened; a first high-pressure main throttle of the first conventional unit-system generator set is slowly closed; the steam exhaust control of a first intermediate pressure cylinder and the slow closing of an isolation valve group of the first conventional unit-system generator set are reduced; the low-pressure water supply connecting pipe control and isolation valve group of the low-pressure water supply connecting pipe is slowly opened; maintaining the water level of the deaerator of the first conventional unit-made generating set to be stable; the deep peak regulation operation of the first conventional unit generator set is realized;
step 3, the main steam connecting pipe control and isolation valve group of the main steam connecting pipe is kept open; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group of the intermediate pressure cylinder steam exhaust connecting pipe is kept open; a first high-pressure main throttle valve of a first conventional unit-system generator set is slowly opened; a first intermediate pressure cylinder steam exhaust control and isolation valve group of a first conventional unit-system generator set is slowly opened; the minimum cooling steam inlet pipeline of a first high pressure cylinder and a first medium pressure cylinder of the first conventional unit-system generator set is controlled, and an isolation valve group is slowly closed; a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group of a first conventional unit-system generator set is slowly closed; a second high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group of a second conventional unit system generator set is opened; a second low-pressure cylinder minimum cooling steam pipeline of a second conventional unit-system generator set controls and an isolation valve group is opened; a second high-pressure main throttle of a second conventional unit-system generator set is slowly closed; the steam exhaust control of a second intermediate pressure cylinder and the slow closing of an isolation valve group of a second conventional unit-system generator set are carried out; the low-pressure water supply control and the isolation valve group are kept open; maintaining the water level of the deaerator of the second conventional unit-made generating set to be stable; and the deep peak shaving operation of the second conventional unit generator set is realized.
The invention has the further improvement that the first conventional unit-system generator set and the second conventional unit-system generator set are both in a grid-connected power generation state, wherein any one set can participate in deep peak shaving at any time.
The invention is further improved in that the operating states of the first conventional unit generator set and the second conventional unit generator set can be switched to each other.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a depth peak-shaving system based on thermodynamic system coupling among units and an operation method thereof.A switching of a depth peak-shaving operation mode of any unit is realized by additionally arranging a main steam connecting pipe, a middle pressure cylinder steam exhaust connecting pipe, a low pressure water supply connecting pipe, a high pressure cylinder minimum cooling steam inlet pipeline, a middle pressure cylinder minimum cooling steam inlet pipeline and a low pressure cylinder minimum cooling steam pipeline; when one unit operates in deep peak regulation, the main steam inlet amount and the low-pressure cylinder steam inlet amount can be reduced to the minimum, at the moment, the unit maintains the minimum work capacity, and the deep peak regulation capacity of the unit is increased. By using the invention, under the deep peak regulation operation condition, most of main steam and low-pressure cylinder steam inlet quantity of one unit can be completely conveyed to the other unit, thereby realizing smaller technical output of one unit. The flexibility of the unit adapting to the dispatching electric load instruction is enhanced, the deep peak regulation electricity price income of the power plant is increased, and the production and operation benefits of the power plant are improved.
Drawings
Fig. 1 is a schematic diagram of a thermodynamic system of a depth peaking system based on thermodynamic system coupling among units according to an embodiment of the present invention.
Description of reference numerals:
1. a first intermediate pressure cylinder steam exhaust control and isolation valve group, 2, a second intermediate pressure cylinder steam exhaust control and isolation valve group; 3. a control and isolation valve group of the intermediate pressure cylinder exhaust connecting pipe; 4. the intermediate pressure cylinder exhausts the union pipe; 5. a low pressure feed water interconnecting pipe; 6. a low-pressure water supply connecting pipe control and isolation valve group; 7. a first intermediate pressure cylinder; 8. a first low pressure cylinder; 9. a second intermediate pressure cylinder; 10. a second low pressure cylinder; 11. a first condensate pump 12, a second condensate pump; 13. a first conventional unit-made generator set, 14, a second conventional unit-made generator set; 15. a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 and a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group; 16. a first low pressure cylinder minimum cooling steam line, 18, a second low pressure cylinder minimum cooling steam line; 19. a main steam interconnecting pipe; 20. a main steam connecting pipe control and isolation valve group; 21. a first high pressure main valve; 22. the minimum cooling steam inlet pipeline of the first high pressure cylinder and the first medium pressure cylinder; 23. a first high pressure cylinder and a first intermediate pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group; 24. a second high pressure main valve; 25. the minimum cooling steam inlet pipeline of the second high and medium pressure cylinders; 26. a second high pressure cylinder and a second medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group; 27. a first high pressure cylinder; 28. and a second high pressure cylinder.
Detailed Description
The present invention will now be described in further detail with reference to specific embodiments thereof, which are illustrated by way of example and not by way of limitation.
As shown in fig. 1, the depth peak-shaving system based on thermodynamic system coupling between units provided by the invention comprises a first conventional unit generator set 13 and a second conventional unit generator set 14, wherein the two conventional unit generator sets have substantially the same capacity, equipment type and thermodynamic system.
Specifically comprises a first high-pressure main valve 21, a second high-pressure main valve 24, a first high-pressure cylinder 27, a second high-pressure cylinder 28, a first intermediate pressure cylinder 7, a second intermediate pressure cylinder 9, a first low-pressure cylinder 8, a second low-pressure cylinder 10, a first condensate pump 11, a second condensate pump 12, a first intermediate pressure cylinder steam exhaust control, an isolation valve group 1, a second intermediate pressure cylinder steam exhaust control, an isolation valve group 2, a main steam communication pipe control, an isolation valve group 20, an intermediate pressure cylinder steam exhaust communication pipe control, an isolation valve group 3, a low-pressure water supply communication pipe control, an isolation valve group 6, a first high-pressure and intermediate pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group 23, a second high-pressure and intermediate pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group 26, a first low-pressure cylinder minimum cooling steam pipeline control, an isolation valve group 15, a second low-pressure cylinder minimum cooling steam pipeline control, an isolation valve group 17 and a main steam communication pipe 19, the system comprises an intermediate pressure cylinder steam exhaust connecting pipe 4, a low pressure water supply connecting pipe 5, a first high pressure cylinder minimum cooling steam inlet pipeline 22, a second high pressure cylinder minimum cooling steam inlet pipeline 25, a first low pressure cylinder minimum cooling steam pipeline 16 and a second low pressure cylinder minimum cooling steam pipeline 18.
The intermediate pressure cylinder steam exhaust connecting pipe 4 is connected between a steam exhaust outlet of a first intermediate pressure cylinder 7 and a steam exhaust outlet of a second intermediate pressure cylinder 9 of the two turbines, and the intermediate pressure cylinder steam exhaust connecting pipe 4 is provided with an intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3; the main steam connecting pipe 19 is connected between a first high-pressure main valve 21 and a second high-pressure main valve 24 of the two turbines, and a main steam connecting pipe control and isolation valve group 20 is installed on the main steam connecting pipe 19; the first intermediate pressure cylinder steam exhaust control and isolation valve group 1 is connected between a steam exhaust port of a first intermediate pressure cylinder 7 and a steam inlet of a first low pressure cylinder 8 of the two turbines, and the second intermediate pressure cylinder steam exhaust control and isolation valve group 2 is connected between a steam exhaust port of a second intermediate pressure cylinder 9 and a steam inlet of a second low pressure cylinder 10 of the two turbines; a first low-pressure cylinder minimum cooling steam pipeline 16 is further connected between the inlet and the outlet of the first intermediate-pressure cylinder steam exhaust control and isolation valve group 1, a second low-pressure cylinder minimum cooling steam pipeline 18 is further connected between the inlet and the outlet of the second intermediate-pressure cylinder steam exhaust control and isolation valve group 2, a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 15 is installed on the first low-pressure cylinder minimum cooling steam pipeline 16, and a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 is installed on the second low-pressure cylinder minimum cooling steam pipeline 18; the minimum cooling steam inlet pipeline 22 of the first high-pressure and medium-pressure cylinder is connected between the inlet and the outlet of the first high-pressure main valve 21, the minimum cooling steam inlet pipeline 25 of the second high-pressure and medium-pressure cylinder is connected between the inlet and the outlet of the second high-pressure main valve 24, the minimum cooling steam inlet pipeline 22 of the first high-pressure and medium-pressure cylinder is provided with a first minimum cooling steam inlet pipeline control and isolation valve group 23, and the minimum cooling steam inlet pipeline 25 of the second high-pressure and medium-pressure cylinder is provided with a second minimum cooling steam inlet pipeline control and isolation valve group 26; the low-pressure water supply connecting pipe 5 is connected between the outlet of the first condensate pump 11 and the outlet of the second condensate pump 12 of the two turbines, and the low-pressure water supply connecting pipe 5 is provided with a low-pressure water supply connecting pipe control and isolation valve group 6.
Preferably, a main steam connecting pipe control and isolation valve group 20 is installed on the main steam connecting pipe 19, so that switching of the deep peak shaving operation mode of a single unit is realized.
Preferably, the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3 is installed on the intermediate pressure cylinder steam exhaust connecting pipe 4, and switching of a deep peak regulation operation mode of a single unit is achieved.
Preferably, a first intermediate pressure cylinder steam exhaust control and isolation valve group 1 is installed on an intermediate pressure cylinder steam exhaust pipe of the first conventional unit-made generator set 13, and the valve group can control the steam intake of the first low pressure cylinder 8 and cooperate with the first high pressure main throttle valve 21 to jointly adjust the output of the first conventional unit-made generator set 13.
Preferably, a second intermediate pressure cylinder steam exhaust control and isolation valve group 2 is installed on the intermediate pressure cylinder steam exhaust pipe of the second conventional unit-made generator set 14, and the valve group can control the steam intake of the second low pressure cylinder 10 and cooperate with the second high pressure main throttle valve 24 to jointly adjust the output of the second conventional unit-made generator set 14.
Preferably, the minimum cooling steam inlet pipeline control and isolation valve group 23 of the first high and intermediate pressure cylinder is installed on the minimum cooling steam inlet pipeline 22 of the first conventional unit system generator set 13, and the valve group can maintain the minimum steam inlet amount of the first high pressure cylinder 27, so as to ensure the safe operation of the first high pressure cylinder 27 and the first intermediate pressure cylinder 7.
Preferably, the minimum cooling steam inlet pipeline 25 of the second high and medium pressure cylinder of the second conventional unit-system generator set 14 is provided with a control and isolation valve bank 26 of the minimum cooling steam inlet pipeline of the second high and medium pressure cylinder, and the valve bank can maintain the minimum steam inlet amount of the second high pressure cylinder 28 and ensure the safe operation of the second high pressure cylinder 28 and the second medium pressure cylinder 9.
Preferably, the first low-pressure cylinder minimum cooling steam pipeline 16 of the first conventional unit-system generator set 13 is provided with a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 15, which can maintain the minimum steam inlet amount of the first low-pressure cylinder 8 and ensure the safe operation of the first low-pressure cylinder 8.
Preferably, the second minimum cooling steam pipeline 18 of the second conventional unit-system generator set 14 is provided with a control and isolation valve group 17 of the first minimum cooling steam pipeline of the low pressure cylinder, which can maintain the minimum steam admission amount of the second low pressure cylinder 10 and ensure the safe operation of the second low pressure cylinder 10.
Preferably, a low-pressure water supply connecting pipe control and isolation valve group 6 is arranged on the low-pressure water supply connecting pipe 5 and used for adjusting the low-pressure water supply flow of the two units in the deep peak shaving process and maintaining the stable water level of the deaerator.
The invention provides an operation method of a depth peak regulation system between units based on thermodynamic system coupling, which comprises the following steps:
step 1, a first conventional unit-made generator set 13 and a second conventional unit-made generator set 14 run normally, and a high-first high-pressure main throttle 21 and a second high-pressure main throttle 24 keep normal running states; the main steam connecting pipe control and isolation valve group 20 of the main steam connecting pipe 19 is in a closed state; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3 of the intermediate pressure cylinder steam exhaust connecting pipe 4 is in a closed state; the low-pressure water supply connecting pipe control and isolation valve group 6 of the low-pressure water supply connecting pipe 5 is in a closed state; a first intermediate pressure cylinder steam exhaust control and isolation valve group 1 of a first conventional unit-system generator set 13 is in an open state; the minimum cooling steam inlet pipeline control and isolation valve group 23 of the first high and medium pressure cylinders of the first conventional unit-system generator set 13 is in a closed state; the first low-pressure cylinder minimum cooling steam pipeline of the first conventional unit generator set 13 is controlled, and the isolation valve group 15 is in a closed state; the second intermediate pressure cylinder steam exhaust control and isolation valve group 2 of the second conventional unit-system generator set 14 is in an open state; the second high and medium pressure cylinder minimum cooling steam admission line control, isolation valve bank 26 of the second conventional unit system generator set 14 is in a closed state; the second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 of the second conventional unit generator set 14 is in a closed state;
step 2, opening a main steam connecting pipe control and isolation valve group 20 of the main steam connecting pipe 19; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3 of the intermediate pressure cylinder steam exhaust connecting pipe 4 is opened; a first high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group 23 of the first conventional unit system generator set 13 is opened; a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 15 of the first conventional unit generator set 13 is opened; the first high-pressure main throttle valve 21 of the first conventional unit-system generator set 13 is slowly closed; the first intermediate pressure cylinder steam exhaust control and isolation valve group 1 of the first conventional unit-system generator set 13 is slowly closed; the low-pressure water supply connecting pipe control and isolation valve group 6 of the low-pressure water supply connecting pipe 5 is slowly opened; maintaining the water level of the deaerator of the first conventional unit generator set 13 to be stable; the deep peak regulation operation of the first conventional unit generator set 13 is realized;
step 3, the main steam connecting pipe control and isolation valve group 20 of the main steam connecting pipe 19 is kept open; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3 of the intermediate pressure cylinder steam exhaust connecting pipe 4 is kept open; a first high-pressure main throttle valve 21 of the first conventional unit generator set 13 is slowly opened; a first intermediate pressure cylinder steam exhaust control and isolation valve group 1 of a first conventional unit-system generator set 13 is slowly opened; the first high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group 23 of the first conventional unit system generator set 13 is closed slowly; the first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 15 of the first conventional unit system generator set 13 is slowly closed; the second high and medium pressure cylinder minimum cooling steam admission line control and isolation valve bank 26 of the second conventional unit system generator set 14 is opened; a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 of the second conventional unit generator set 14 is opened; the second high-pressure main throttle 24 of the second conventional unit-system generator set 14 is slowly closed; the second intermediate pressure cylinder steam exhaust control and the isolating valve group 2 of the second conventional unit-system generator set 14 are slowly closed; the low-pressure water supply control and isolation valve group 6 is kept open; maintaining the water level of the deaerator of the second conventional unit generator set 14 to be stable; and realizing the deep peak shaving operation of the second conventional unit generator set 14.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures or equivalent processes performed by the present specification and drawings, or applied to a plurality of units, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The depth peak-shaving system based on thermodynamic system coupling among units is characterized by comprising a first conventional unit generator set (13) and a second conventional unit generator set (14);
the steam-exhaust system specifically comprises a first high-pressure main steam valve (21), a second high-pressure main steam valve (24), a first high-pressure cylinder (27), a second high-pressure cylinder (28), a first intermediate pressure cylinder (7), a second intermediate pressure cylinder (9), a first low-pressure cylinder (8), a second low-pressure cylinder (10), a first condensate pump (11), a second condensate pump (12), a first intermediate pressure cylinder steam-exhaust control, an isolation valve group (1), a second intermediate pressure cylinder steam-exhaust control, an isolation valve group (2), a main steam connection pipe control, an isolation valve group (20), an intermediate pressure cylinder steam-exhaust connection pipe control, an isolation valve group (3), a low-pressure water supply connection pipe control, an isolation valve group (6), a first high-pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group (23), a second high-pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group (26), a first low-pressure cylinder minimum cooling steam pipeline control, a second high-pressure cylinder minimum cooling steam inlet pipeline control, a first low-steam inlet pipeline control, a second high-pressure cylinder minimum cooling steam inlet control, a second condensate pump, a second, a third, a second, a third, a fourth, The steam-steam cooling system comprises an isolation valve group (15), a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (17), a main steam connecting pipe (19), a medium-pressure cylinder steam exhaust connecting pipe (4), a low-pressure water supply connecting pipe (5), a first high-pressure cylinder minimum cooling steam inlet pipeline (22), a second high-pressure cylinder minimum cooling steam inlet pipeline (25), a first low-pressure cylinder minimum cooling steam pipeline (16) and a second low-pressure cylinder minimum cooling steam pipeline (18);
the intermediate pressure cylinder steam exhaust connecting pipe (4) is connected between a steam exhaust outlet of a first intermediate pressure cylinder (7) and a steam exhaust outlet of a second intermediate pressure cylinder (9) of the two turbines, and the intermediate pressure cylinder steam exhaust connecting pipe (4) is provided with an intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group (3);
the main steam connecting pipe (19) is connected between the steam inlets of the first high-pressure main throttle valve (21) and the second high-pressure main throttle valve (24) of the two turbines, and a main steam connecting pipe control and isolation valve group (20) is installed on the main steam connecting pipe (19);
the first intermediate pressure cylinder steam exhaust control and isolation valve group (1) is connected between a steam exhaust port of the first intermediate pressure cylinder (7) and a steam inlet of the first low pressure cylinder (8), and the second intermediate pressure cylinder steam exhaust control and isolation valve group (2) is connected between a steam exhaust port of the second intermediate pressure cylinder (9) and a steam inlet of the second low pressure cylinder (10);
a first low-pressure cylinder minimum cooling steam pipeline (16) is further connected between an inlet and an outlet of the first intermediate-pressure cylinder steam exhaust control and isolation valve group (1), a second low-pressure cylinder minimum cooling steam pipeline (18) is further connected between an inlet and an outlet of the second intermediate-pressure cylinder steam exhaust control and isolation valve group (2), a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (15) are installed on the first low-pressure cylinder minimum cooling steam pipeline (16), and a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (17) are installed on the second low-pressure cylinder minimum cooling steam pipeline (18);
a first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline (22) is connected between the inlet and the outlet of a first high-pressure main steam valve (21), a second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline (25) is connected between the inlet and the outlet of a second high-pressure main steam valve (24), a first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (23) is installed on the first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline (22), and a second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (26) is installed on the second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline (25);
the low-pressure water supply connecting pipe (5) is connected between the outlet of a first condensate pump (11) and the outlet of a second condensate pump (12) of the two turbines, and a low-pressure water supply connecting pipe control and isolation valve group (6) is installed on the low-pressure water supply connecting pipe (5);
the main steam of the first conventional unit generator set (13) can enter a second high-pressure cylinder (28) and a second intermediate-pressure cylinder (9) of the second conventional unit generator set (14) through a main steam communication pipe (19) to do work, and the main steam of the second conventional unit generator set (14) can enter a first high-pressure cylinder (27) and a first intermediate-pressure cylinder (7) of the first conventional unit generator set (13) through the main steam communication pipe (19) to do work.
2. The inter-unit thermodynamic system coupling-based deep peak shaving system according to claim 1, wherein the first conventional unit generator set (13) and the second conventional unit generator set (14) have the same power generation capacity and capacity, and the equipment type and thermodynamic system design are the same.
3. An inter-unit thermodynamic system coupling-based depth peaking system according to claim 1, wherein the first conventional unit generator set (13) and the second conventional unit generator set (14) are operated in a state where both boilers and turbines are in operation.
4. A deep peak shaving system based on thermodynamic system coupling among units as claimed in claim 1, wherein when the second high pressure main valve (24) of the second conventional unit generator set (14) is closed, the main steam of the second conventional unit generator set (14) can enter the second high pressure cylinder (28) and the second intermediate pressure cylinder (9) via the second high and intermediate pressure cylinder minimum cooling steam inlet pipeline (25), ensuring the safe operation of the second high pressure cylinder (28) and the second intermediate pressure cylinder (9);
when a first high-pressure main throttle valve (21) of the first conventional unit-system generator set (13) is closed, main steam of the first conventional unit-system generator set (13) can enter a first high-pressure cylinder (27) and a first intermediate-pressure cylinder (7) through a first high-pressure and intermediate-pressure cylinder minimum cooling steam inlet pipeline (22), and safe operation of the first high-pressure cylinder (27) and the first intermediate-pressure cylinder (7) is guaranteed.
5. The inter-unit thermodynamic system coupling-based depth peaking system according to claim 1, wherein the exhaust steam of a first intermediate pressure cylinder (7) of a first conventional unit generator set (13) can enter a second low pressure cylinder (10) of a second conventional unit generator set (14) through an intermediate pressure cylinder exhaust steam communication pipe (4) to do work;
the exhaust steam of a second intermediate pressure cylinder (9) of the second conventional unit-system generator set (14) can enter a first low pressure cylinder (8) of the first conventional unit-system generator set (13) through an intermediate pressure cylinder exhaust steam communication pipe (4) to do work.
6. The inter-unit thermodynamic system coupling-based depth peaking system according to claim 1, wherein the condensed water at the outlet of the first condensed water pump (11) of the first conventional unit generating set (13) enters the low pressure water supply system of the second conventional unit generating set (14) from the low pressure water supply communication pipe (5) to maintain the deaerator water level of the second conventional unit generating set (14) stable;
condensed water at the outlet of a second condensed water pump (12) of a second conventional unit generating set (14) enters a low-pressure water supply system of a first conventional unit generating set (13) through a low-pressure water supply communication pipe (5) so as to maintain the water level of a deaerator of the first conventional unit generating set (13) stable.
7. The inter-unit thermodynamic system coupling-based depth peaking system according to claim 1, wherein when a second intermediate pressure cylinder exhaust steam control and isolation valve group (2) of the second conventional unit generator set (14) is closed, partial intermediate pressure cylinder exhaust steam of the second conventional unit generator set (14) enters the second low pressure cylinder (10) through a second low pressure cylinder minimum cooling steam pipeline (18) to cool the low pressure cylinder, so that safe operation of the second low pressure cylinder (10) is ensured;
when a first intermediate pressure cylinder steam exhaust control and isolation valve group (1) of the first conventional unit-made generator set (13) is closed, part of intermediate pressure cylinder steam exhaust of the first conventional unit-made generator set (13) enters the first low pressure cylinder (8) through the first low pressure cylinder minimum cooling steam pipeline (16) to cool the low pressure cylinder, and safe operation of the first low pressure cylinder (8) is guaranteed.
8. A method for operating an inter-unit depth peak-shaving system based on thermodynamic system coupling, which is based on an inter-unit depth peak-shaving system based on thermodynamic system coupling as claimed in any one of claims 1 to 7, and comprises the following steps:
step 1, a first conventional unit-made generator set (13) and a second conventional unit-made generator set (14) run normally, and a high-first high-pressure main throttle (21) and a second high-pressure main throttle (24) keep normal running states; the main steam connecting pipe control and isolation valve group (20) of the main steam connecting pipe (19) is in a closed state; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group (3) of the intermediate pressure cylinder steam exhaust connecting pipe (4) is in a closed state; the low-pressure water supply connecting pipe control and isolation valve group (6) of the low-pressure water supply connecting pipe (5) is in a closed state; a first intermediate pressure cylinder steam exhaust control and isolation valve group (1) of a first conventional unit-system generator set (13) is in an open state; a first high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (23) of a first conventional unit system generator set (13) is in a closed state; a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (15) of a first conventional unit generator set (13) is in a closed state; a second intermediate pressure cylinder steam exhaust control and isolation valve group (2) of a second conventional unit-system generator set (14) is in an open state; a second high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (26) of a second conventional unit system generator set (14) is in a closed state; a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (17) of a second conventional unit generator set (14) is in a closed state;
step 2, a main steam communication pipe control and isolation valve group (20) of the main steam communication pipe (19) is opened; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group (3) of the intermediate pressure cylinder steam exhaust connecting pipe (4) is opened; a first high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (23) of a first conventional unit system generator set (13) is opened; a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (15) of a first conventional unit generator set (13) is opened; a first high-pressure main throttle valve (21) of a first conventional unit-system generator set (13) is slowly closed; a first intermediate pressure cylinder steam exhaust control and isolation valve group (1) of a first conventional unit-system generator set (13) is slowly closed; the low-pressure water supply connecting pipe control and isolation valve group (6) of the low-pressure water supply connecting pipe (5) is slowly opened; the water level of a deaerator of a first conventional unit-made generator set (13) is maintained to be stable; realizing deep peak regulation operation of a first conventional unit generator set (13);
step 3, the main steam connecting pipe control and isolation valve group (20) of the main steam connecting pipe (19) is kept open; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group (3) of the intermediate pressure cylinder steam exhaust connecting pipe (4) is kept open; a first high-pressure main throttle valve (21) of a first conventional unit generator set (13) is slowly opened; a first intermediate pressure cylinder steam exhaust control and isolation valve group (1) of a first conventional unit-system generator set (13) is slowly opened; a first high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (23) of a first conventional unit system generator set (13) is slowly closed; a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (15) of a first conventional unit generator set (13) is slowly closed; a second high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (26) of a second conventional unit system generator set (14) is opened; a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (17) of a second conventional unit generator set (14) is opened; a second high-pressure main throttle valve (24) of a second conventional unit-system generator set (14) is slowly closed; a second intermediate pressure cylinder steam exhaust control and isolation valve group (2) of a second conventional unit-system generator set (14) is slowly closed; the low-pressure water supply control and isolation valve group (6) is kept open; maintaining the water level of a deaerator of a second conventional unit-made generator set (14) stable; and realizing the deep peak shaving operation of the second conventional unit generator set (14).
9. The method for operating the inter-unit thermodynamic system coupling-based deep peak shaving system according to claim 8, wherein the first conventional unit generator set (13) and the second conventional unit generator set (14) are both in a grid-connected power generation state, and any one of the units can participate in the deep peak shaving at any time.
10. An operation method of an inter-unit thermodynamic system coupling-based depth peaking system according to claim 8, wherein operation states of the first conventional unit generator set (13) and the second conventional unit generator set (14) can be switched to each other.
CN202110298131.2A 2021-03-19 2021-03-19 Depth peak regulation system based on thermodynamic system coupling among units and operation method thereof Pending CN113153467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110298131.2A CN113153467A (en) 2021-03-19 2021-03-19 Depth peak regulation system based on thermodynamic system coupling among units and operation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110298131.2A CN113153467A (en) 2021-03-19 2021-03-19 Depth peak regulation system based on thermodynamic system coupling among units and operation method thereof

Publications (1)

Publication Number Publication Date
CN113153467A true CN113153467A (en) 2021-07-23

Family

ID=76888118

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110298131.2A Pending CN113153467A (en) 2021-03-19 2021-03-19 Depth peak regulation system based on thermodynamic system coupling among units and operation method thereof

Country Status (1)

Country Link
CN (1) CN113153467A (en)

Similar Documents

Publication Publication Date Title
US11236640B2 (en) Steam power plant, modification method and operation method of steam power plant
CN109653810B (en) One furnace with two-machine switching operation thermodynamic system
CN110701663B (en) Injection type heat pump exhaust steam recovery heat supply mode and system based on complete thermal electrolytic coupling
CN110656991B (en) Injection distribution thermal electrolytic coupling mode based on axial thrust balance and reheat balance
CN113175362B (en) Bus pipe connection system for realizing zero output of low-pressure cylinder and operation method
CN113175363A (en) Master pipe connection system for adjusting high-pressure cylinder to do work and operation method
CN210509309U (en) Steam complementary energy utilization coupling steam extraction heat supply system for thermoelectric unit electric power peak regulation
CN109869784B (en) Combined cycle device for steam extraction integration and heat accumulation peak shaving coupling and operation method thereof
CN113175367B (en) Master control system for improving peak regulation capacity and flexibility of unit and operation method
CN112879110A (en) Thermodynamic system with one furnace and two machines operating at ultralow load and switching method thereof
CN114046186A (en) High-flexibility high-thermoelectric-ratio composite thermal mass bypass heating system
CN113431651A (en) Low-load operation system with one furnace and two machines
CN113175360A (en) Bus pipe connection system for improving deep peak shaving low-pressure cylinder efficiency and operation method
CN214464455U (en) Depth peak regulation system based on thermodynamic system coupling among units
CN113153467A (en) Depth peak regulation system based on thermodynamic system coupling among units and operation method thereof
CN214464454U (en) Coupling peak regulation system based on main steam, medium exhaust and steam extraction cooling
CN215761819U (en) Rapid starting system for steam turbine set of coal-fired power plant
CN113175361B (en) High-pressure cylinder zero-output and reheat steam main pipe system connection and operation method
CN113494321B (en) High-pressure cylinder zero-output-force-based bus pipe connection system and operation method
CN113153468A (en) Main steam, middle exhaust and extraction steam cooling-based coupling peak shaving system and operation method thereof
CN214660396U (en) Coupling peak shaving system based on middle row and cooling of middle row among units
CN214464456U (en) Coupling peak regulation system based on medium-pressure exhaust and low-pressure steam extraction cooling
CN113153469A (en) Coupling peak regulation system based on medium-exhaust and low-pressure extraction cooling and operation method thereof
CN113153470A (en) Coupling peak shaving system based on middle row and cooling of units and operation method thereof
CN110056402B (en) Steam complementary energy utilization coupling steam extraction heat supply system and adjusting method

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