CN113175363A - Master pipe connection system for adjusting high-pressure cylinder to do work and operation method - Google Patents
Master pipe connection system for adjusting high-pressure cylinder to do work and operation method Download PDFInfo
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- CN113175363A CN113175363A CN202110448371.6A CN202110448371A CN113175363A CN 113175363 A CN113175363 A CN 113175363A CN 202110448371 A CN202110448371 A CN 202110448371A CN 113175363 A CN113175363 A CN 113175363A
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- 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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- 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
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- 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
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- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- General Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a main pipe connection system for adjusting a high-pressure cylinder to do work and an operation method thereof. And a main steam communication main pipe, a reheating cold section steam communication main pipe, a reheating hot section steam communication main pipe and a high-pressure heater system water inlet communication main pipe are additionally arranged. When partial unit boilers are shut down, are in hot standby or are in two-shift operation, the steam turbines of the boiler blowing unit can obtain main and reheat steam by controlling the connection valve group between each main pipe and the unit, the cold reheat steam of the boiler blowing unit is recycled, the boiler blowing is not shut down, in addition, the reduction of the steam inlet quantity of a high-pressure cylinder of a certain unit and the non-operation of a high-pressure heat recovery system can be realized by adjusting, the feed water enters other units for heating, and therefore the feed water temperature is obviously improved. By adopting the method, the unit can realize further machine-furnace decoupling under the operating condition of 'less furnaces and multiple machines', and further reduce the output power rate of the steam turbine generator unit under the operating condition of deep peak shaving under the normal operating condition of the boiler in operation.
Description
Technical Field
The invention belongs to the field of thermal power generation, and particularly relates to a header pipe connection system for adjusting a high-pressure cylinder to do work and an operation method.
Background
Modern science and technology can not solve the economic storage problem of large-capacity electric energy temporarily, and the output of power generation and supply equipment in a power grid must be kept in dynamic balance with the changing power load all the time. With the continuous development of national economy and the change of power utilization structures, power systems face the contradiction that the peak-to-valley difference of power grids is large and the peak regulation capability is insufficient. On the other hand, a large amount of novel clean energy such as photoelectricity and wind power is put into use, and large-scale intermittent energy is used for grid-connected power generation, so that fluctuation of a power grid is increased, and therefore the power grid provides higher requirements for the thermal power generating unit to participate in peak regulation and even deep peak regulation.
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. There is substantially no cross-directional communication between the individual units. The normal operation of boiler equipment has a minimum limit value on the unit load, so that the minimum load value of the unit under the deep peak shaving operation condition is limited, and the flexibility of the unit under the deep peak shaving operation condition is greatly reduced; in addition, when the boiler equipment needs to be overhauled, has a fault, runs in two shifts of the unit, is in a hot standby state or needs to be shut down, the matched steam turbine and the generator are forced to stop simultaneously, so that the running flexibility and the generating capacity of the unit are greatly influenced.
In recent years, with the continuous promotion of upgrading and transforming work of thermal power generating units, a system and an operation method capable of realizing interconnection of a boiler and a steam turbine among high-capacity thermal power generating units are urgently needed to improve the flexibility of the thermal power generating units under a deep peak shaving operation condition and the generating capacity of the thermal power generating units under an accident state of boiler equipment.
At present, the proportion of thermal power generating units in the domestic electric power market is still large, and the long-term strategic objectives of 'carbon peak reaching' and 'carbon neutralization' are established, so that the new energy power generation installation is promoted to be increased in a long time in the future. In order to maintain the stability of the power grid, the power grid puts higher requirements on thermal power generation enterprise units except for being equipped with corresponding energy storage systems, and thermal power generating units are more responsible for peak shaving tasks in the future, especially deep peak shaving tasks.
However, even after the boiler equipment is subjected to the technical transformation and optimization of low-load stable combustion, the peak regulation capacity is still greatly limited; the unit which is transformed by thermoelectric decoupling can improve the flexibility of the unit within a certain range only under the working condition of heat supply.
In addition, under the deep peak shaving working condition of the thermal power generating unit, the overall efficiency of the thermal power generating unit is obviously reduced due to the fact that the running states of boiler equipment and steam turbine equipment are greatly different from the design states. For example, when the unit of the unit is operated, the steam inlet quantity of the steam turbine is reduced, so that the steam extraction pressure of the high-pressure cylinder is obviously reduced, the water supply temperature is reduced, and the overall energy consumption of the unit is indirectly obviously increased.
Therefore, in order to meet the national strategic requirements, the thermal power generating unit must improve the deep peak regulation capability of the unit, and in order to improve the profit level of the thermal power generating unit, the improvement of the economy under the deep peak regulation working condition becomes a necessary choice.
Disclosure of Invention
The invention aims to provide a main pipe connection system and an operation method for adjusting a high-pressure cylinder to do work, so that load distribution among multiple units under the deep peak regulation operation condition of the units is improved, and the units still have power generation capacity under the condition that a boiler is stopped.
The invention is realized by adopting the following technical scheme:
a kind of header system connecting system which adjusts the high-pressure cylinder to do work, including the steam-water system of the turboset and adding the system; wherein, add the system and include: the main steam communication main pipe, the reheating cold section steam communication main pipe, the reheating hot section steam communication main pipe and the high-pressure heater system water inlet communication main pipe;
the main steam communication main pipe is respectively connected to a superheater outlet main steam pipeline of each unit boiler, a connection point is arranged on a pipeline between a boiler superheater outlet valve group and a steam turbine steam inlet valve group, and a single machine to main steam communication main pipe control and isolation valve is arranged between the connection point and the main steam communication main pipe;
the reheat cooling section steam communication main pipe is connected with a reheat cooling section steam pipeline of each unit boiler, a connection point is arranged on a pipeline between a high-pressure cylinder outlet of a steam turbine and a boiler reheater steam inlet valve bank, and a single-machine to reheat cooling section steam communication main pipe control and isolation valve bank is arranged between the connection point and the reheat cooling section steam communication main pipe;
the reheating heat section steam communication main pipe is connected with reheating heat section steam pipelines of the boiler of each unit, the connection point is arranged on a pipeline between a boiler reheater steam outlet valve bank and the inlet of a steam turbine intermediate pressure cylinder, and a single machine to reheating heat section steam communication main pipe control and isolation valve bank is arranged between the connection point and the reheating heat section steam communication main pipe;
the high-pressure heater system water inlet communication main pipe is connected with water inlet pipelines of the high-pressure heater systems of the units, the connection point is arranged on the pipeline between the outlet of the water supply pump and the water inlet of the high-pressure heater system, a single machine is arranged between the connection point and the water inlet communication main pipe of the high-pressure heater system and is connected with the main pipe isolation and control valve group of the high-pressure heater system, and the isolation and control valve group behind the water supply pump is arranged between the connection point and the water inlet of the high-.
The invention is further improved in that the steam-water system of the steam turbine set comprises boilers 1, 2, … … and n, wherein the outlet of a superheated steam pipeline of each boiler is communicated with the steam inlet of a high-pressure cylinder, the steam outlet of a high-pressure cylinder is communicated with the inlet of a reheated steam pipeline of the boiler, the outlet of the reheated steam pipeline of the boiler is communicated with the steam inlet of an intermediate-pressure cylinder, the steam outlet of the intermediate-pressure cylinder is communicated with the steam inlet of a low-pressure cylinder, the steam outlet of the low-pressure cylinder is communicated with a condenser, the steam outlet of the high-pressure cylinder is communicated with the steam inlet of a high-pressure heating system, the steam outlet of the intermediate-pressure cylinder is communicated with the steam inlet of a deaerator, the steam outlet of the low-pressure cylinder is communicated with the steam inlet of a low-pressure heating system, and the condenser, the condensate pump, the low-pressure heating system, the deaerator and the water feeding pump are sequentially communicated with the water inlet and the water outlet of the high-pressure heating system, and the water outlet of the high-pressure heating system is communicated with the inlet of a water feeding pipeline of the boiler.
The invention is further improved in that when only two units are provided, the two units are connected by using a communicating pipe equipped with an isolation valve group and a control valve group.
An operation method of a main pipe connection system for adjusting high-pressure cylinder to do work is based on the main pipe connection system for adjusting high-pressure cylinder to do work, and takes the shutdown of a boiler of a No. 1 unit in a plurality of units as an example, and comprises the following steps:
when the No. 1 boiler is stopped, closing a main steam isolation valve group, a reheating cold section steam isolation valve group and a hot section steam isolation valve group of the No. 1 boiler to prevent steam from flowing back to the stopped boiler; opening a main steam communication main pipe control and isolation valve group of the boiler, and supplying main steam to the No. 1 steam turbine and the steam turbine of the unit by the boilers of other units at the same time; opening a control and isolation valve group of a reheating cold section steam communication main pipe, enabling the cold reheating steam of the No. 1 unit to enter the reheating cold section steam communication main pipe, and heating the reheating cold section steam of the No. 1 unit by boilers of other units; opening a reheating hot section steam communication main pipe control and isolation valve group, and supplying reheating hot section steam to the No. 1 steam turbine and a middle pressure cylinder of the unit by boilers of other units; the high-pressure cylinder of the No. 1 machine does not extract steam, and the high-pressure heater system does not work; the machine No. 1 does not perform three-stage steam extraction, and the third-stage high-pressure heater does not work; steam enters a condenser after passing through a low-pressure cylinder, condensed water is conveyed to a low-pressure heater system through a condensed water pump and then enters a deaerator after being heated; and closing the isolation and control valve group behind the water feeding pump, opening the isolation and control valve group of the water inlet communication main pipe of the high-pressure heater system, conveying the feed water to the water inlet communication main pipe of the high-pressure heater system through the water feeding pump, and then conveying the feed water to the high-pressure heater systems of other units for heating.
A further improvement of the invention is that boiler outages refer to maintenance, failure, unit two shift operation, unit hot standby, and all other situations where there is a planned or unexpected outage of the boiler plant.
The invention further improves the method that the valve group refers to a regulating valve and an isolating valve.
A further development of the invention is that the valves are of the kind electrically, pneumatically, hydraulically and manually operated.
Compared with the prior art, the invention has at least the following beneficial technical effects:
(1) by adopting the method, the unit can realize the operation mode of 'few furnaces and multiple machines', thereby realizing the function of 'machine-furnace decoupling', namely, each turbine generator can still normally operate to generate electricity under the condition that part of the boilers are stopped;
(2) by adopting the method, the unit can realize the operation of a plurality of machines with less furnaces, so the integral deep peak shaving capacity of the plurality of units can be obviously improved;
(3) by adopting the method, the main steam flow entering a certain unit can be adjusted, the high-pressure cylinder of the certain unit is stopped to extract steam, and high-pressure feed water is conveyed to the high-pressure heater of the steam turbine with a large load high-pressure cylinder to do work, so that the purpose of improving the feed water temperature is realized, and the unit operation efficiency under the deep peak regulation operation condition can be improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Reference numbers (Pn refers to pump of nth unit, Vn refers to valve of nth unit):
pn-1, a water supply pump,
pn-2, a condensate pump,
vn-1, a main steam communication main pipe control and isolation valve bank,
vn-2, a boiler main steam control and isolation valve bank,
vn-3, a reheating cold section steam is communicated with a main pipe control and isolation valve bank,
vn-4, a reheating cold section steam control and an isolation valve bank,
vn-5, a reheating thermal section steam is communicated with a main pipe control and isolation valve bank,
vn-6, a reheating hot section steam control and an isolation valve bank,
vn-7, a high-pressure cylinder steam inlet control and an isolation valve bank,
vn-8, a middle pressure cylinder steam inlet control and an isolation valve group,
vn-9, a low-pressure cylinder steam inlet control and an isolation valve bank,
vn-10, a high-pressure heater system is communicated with a main pipe isolation and control valve group,
vn-11, a water pump rear isolation and control valve bank.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the header connection system for adjusting high-pressure cylinder to do work provided by the invention comprises a conventional boiler, a steam-water system of a steam turbine set and an additional system. Wherein, add the system and include: the system comprises a main steam communication main pipe, a reheating cold section steam communication main pipe, a reheating hot section steam communication main pipe, a high-pressure cylinder steam extraction communication main pipe, a deaerator steam extraction communication main pipe, a three-section steam extraction communication main pipe, a final water supply communication main pipe, an intermediate pressure cylinder steam exhaust communication main pipe, a low-pressure cylinder steam extraction communication main pipe, a condenser hot well water pouring pump, a condenser hot well water communication main pipe and a corresponding control and shutoff valve set.
Wherein, the steam-water system of the steam turbine set comprises boilers 1, 2, … … and n, the outlet of the superheated steam pipeline of each boiler is communicated with the steam inlet of the high-pressure cylinder, the steam outlet of the high-pressure cylinder is communicated with the inlet of the reheated steam pipeline of the boiler, the outlet of the reheated steam pipeline of the boiler is communicated with the steam inlet of the intermediate pressure cylinder, the steam outlet of the intermediate pressure cylinder is communicated with the steam inlet of the low-pressure cylinder, the steam outlet of the low-pressure cylinder is communicated with the condenser, the steam outlet of the high-pressure cylinder is communicated with the steam inlet of the high-pressure heating system, the steam outlet of the intermediate pressure cylinder is communicated with the steam inlet of the deaerator, the steam outlet of the low-pressure cylinder is communicated with the steam inlet of the low-pressure heating system, and the condenser, the condensate pump, the low-pressure heating system, the deaerator and the water feeding pump are sequentially communicated with the water inlet and the water outlet of the high-pressure heating system, and the water outlet of the high-pressure heating system is communicated with the inlet of a water feeding pipeline of the boiler.
The connection mode of the main steam communication main pipe in the additionally-arranged system is as follows: the main steam communication main pipe is respectively connected to a superheater outlet main steam pipeline of each unit boiler, a connection point is arranged on a pipeline between a boiler superheater outlet valve bank Vn-2 and a steam turbine steam inlet valve bank Vn-7, and a single machine and a main steam communication main pipe control and isolation valve bank Vn-1 are arranged between the connection point and the main steam communication main pipe.
The connection mode of the reheating cold section steam communication main pipe in the additionally-arranged system is as follows: the reheating cold section steam communication main pipe is connected with a reheating cold section steam pipeline of each unit boiler, the connection point is arranged on a pipeline between the outlet of a steam turbine high-pressure cylinder and a boiler reheater steam inlet valve bank Vn-4, and a single machine to reheating cold section steam communication main pipe control and isolation valve bank Vn-3 is arranged between the connection point and the reheating cold section steam communication main pipe.
The reheating thermal section steam communication main pipe in the additionally-arranged system is connected in a mode that: the reheating thermal section steam communication main pipe is connected with reheating thermal section steam pipelines of the boilers of the units, the connection point is arranged on a pipeline between a boiler reheater steam outlet valve bank Vn-6 and a steam inlet valve bank Vn-8 of a steam turbine intermediate pressure cylinder, and a single machine to reheating thermal section steam communication main pipe control and isolation valve bank Vn-5 is arranged between the connection point and the reheating thermal section steam communication main pipe.
The connection mode of the water inlet communication main pipe of the high-pressure heater system in the additionally-arranged system is as follows: the high-pressure heater system water inlet communication main pipe is connected with water inlet pipelines of the high-pressure heater systems of the units, a connection point is arranged on a pipeline between an outlet of a water feeding pump Pn-1 and a water inlet of the high-pressure heater system, a single machine is arranged between the connection point and the water inlet communication main pipe of the high-pressure heater system and a water feeding pump rear isolation and control valve group Vn-10 is arranged between the connection point and the water inlet of the high-pressure heater system and a water feeding pump rear isolation and control valve group Vn-11 is arranged between the connection point and the water inlet of the high-pressure heater system.
The invention provides a header control connection system and an operation method for adjusting a high-pressure cylinder to do work, which take the shutdown of a boiler of a No. 1 unit in a plurality of units as an example, and comprise the following operation contents:
when the No. 1 boiler is stopped, the main steam isolation valve group V1-2, the cold reheat section steam isolation valve group V1-4 and the hot reheat section steam isolation valve group V1-6 of the No. 1 boiler are closed, and steam is prevented from flowing back to the stopped boiler. Opening a main steam communication main pipe control and isolation valve group V1-1 of a boiler of the No. 1 unit, and opening main steam communication main pipe control and isolation valve groups Vm-1(m is 2,3,4, …, n is the number of other running units and can be a plurality of units) of boilers of other running units, wherein the boilers of other units can simultaneously supply main steam for a steam turbine of the No. 1 unit and a steam turbine of the local unit; opening a reheating cold section steam communication main pipe control and isolation valve group V1-3, enabling cold reheating steam of the No. 1 machine set to enter the reheating cold section steam communication main pipe, opening other operation machine set reheating cold section steam communication main pipe control and isolation valve group Vm-3, and heating the reheating cold section steam of the No. 1 machine set by boilers of other machine sets; opening a reheating hot section steam communication main pipe control and isolation valve group V1-5, opening other operation unit reheating hot section steam communication main pipe control and isolation valve group Vm-5, and supplying reheating hot section steam to a No. 1 steam turbine and a middle pressure cylinder of the unit by boilers of other units; the high-pressure cylinder of the No. 1 machine does not extract steam, and the high-pressure heater system does not work; the machine No. 1 does not perform three-stage steam extraction, and the third-stage high-pressure heater does not work; steam enters a condenser after passing through a low-pressure cylinder, condensed water is conveyed to a low-pressure heater system through a condensed water pump P1-2 to be heated, and then enters a deaerator; and closing the isolation and control valve group V1-11 after the water feeding pump is closed, opening the isolation and control valve group V1-10 of the water inlet communication main pipe of the high-pressure heater system, conveying the feed water to the water inlet communication main pipe of the high-pressure heater system through the water feeding pump, and then conveying the feed water to the high-pressure heater systems of other units for heating.
Table 1 shows the comparison between the operation states of the main valves and the equipment of the system under the conventional unit system operation condition and the operation states of the main valves and the equipment of the system under the less-furnace multi-machine operation condition by using the method of the present invention.
Table 1 takes two units as an example, the unit system operation is that the two units both operate normally, the less-furnace multi-machine system operation is that the No. 1 unit boiler stops operating, and the No. 2 unit boiler supplies main steam to the No. 1 unit turbine and the No. 2 unit turbine at the same time.
According to the master pipe connection system and the operation method for adjusting the high-pressure cylinder to do work, the unit can operate in a mode of few furnaces and multiple machines, so that a certain machine-furnace decoupling operation function is realized, and the output power rate of the steam turbine generator unit under the deep peak-shaving operation working condition is further reduced under the normal operation condition of the boiler in operation. By using the invention, under the deep peak regulation operation condition, the non-operation of the high-pressure heat recovery system of the blowing-out unit can be realized, the high-pressure cylinder of the blowing-out unit does not extract steam, most of the steam is conveyed to the low-pressure cylinder to do work, and the actual operation efficiency of the low-pressure cylinder averaged by a plurality of units is improved.
Claims (8)
1. A main pipe connection system for adjusting a high-pressure cylinder to do work is characterized by comprising a steam-water system of a steam turbine set and an additional system; wherein, add the system and include: the main steam communication main pipe, the reheating cold section steam communication main pipe, the reheating hot section steam communication main pipe and the high-pressure heater system water inlet communication main pipe;
the main steam communication main pipe is respectively connected to a superheater outlet main steam pipeline of each unit boiler, a connection point is arranged on a pipeline between a boiler superheater outlet valve group and a steam turbine steam inlet valve group, and a single machine to main steam communication main pipe control and isolation valve is arranged between the connection point and the main steam communication main pipe;
the reheat cooling section steam communication main pipe is connected with a reheat cooling section steam pipeline of each unit boiler, a connection point is arranged on a pipeline between a high-pressure cylinder outlet of a steam turbine and a boiler reheater steam inlet valve bank, and a single-machine to reheat cooling section steam communication main pipe control and isolation valve bank is arranged between the connection point and the reheat cooling section steam communication main pipe;
the reheating heat section steam communication main pipe is connected with reheating heat section steam pipelines of the boiler of each unit, the connection point is arranged on a pipeline between a boiler reheater steam outlet valve bank and the inlet of a steam turbine intermediate pressure cylinder, and a single machine to reheating heat section steam communication main pipe control and isolation valve bank is arranged between the connection point and the reheating heat section steam communication main pipe;
the high-pressure heater system water inlet communication main pipe is connected with water inlet pipelines of the high-pressure heater systems of the units, the connection point is arranged on the pipeline between the outlet of the water supply pump and the water inlet of the high-pressure heater system, a single machine is arranged between the connection point and the water inlet communication main pipe of the high-pressure heater system and is connected with the main pipe isolation and control valve group of the high-pressure heater system, and the isolation and control valve group behind the water supply pump is arranged between the connection point and the water inlet of the high-pressure heater system.
2. The header pipe connection system for adjusting high-pressure cylinder to do work according to claim 1, wherein the steam-water system of the steam turbine set comprises boilers 1, 2, … …, n, an outlet of a superheated steam pipeline of each boiler is communicated with a steam inlet of the high-pressure cylinder, a steam outlet of the high-pressure cylinder is communicated with an inlet of a reheated steam pipeline of the boiler, an outlet of the reheated steam pipeline of the boiler is communicated with a steam inlet of the intermediate-pressure cylinder, a steam outlet of the intermediate-pressure cylinder is communicated with a steam inlet of the low-pressure cylinder, a steam outlet of the low-pressure cylinder is communicated with a condenser, a steam outlet of the high-pressure cylinder is communicated with a steam inlet of the high-pressure heating system, a steam outlet of the intermediate-pressure cylinder is communicated with a steam inlet of a deaerator, a steam outlet of the low-pressure cylinder is communicated with a steam inlet of the low-pressure heating system, the condenser, the condensate pump, the low-pressure heating system, the deaerator, the feed pump are sequentially communicated with water inlets and outlets of the high-pressure heating system, the water outlet of the high-pressure heating system is communicated with the inlet of a water feeding pipeline of the boiler.
3. The buswork connection system for adjusting high-pressure cylinders to do work according to claim 1, wherein when only two units are provided, the two units are connected by using a communicating pipe provided with an isolation valve bank and a control valve bank.
4. An operation method of a main pipe connection system for adjusting a high-pressure cylinder to do work is characterized in that the method is based on the main pipe connection system for adjusting the high-pressure cylinder to do work of any one of claims 1 to 3, and the method comprises the following steps of:
when the No. 1 boiler is stopped, closing a main steam isolation valve group, a reheating cold section steam isolation valve group and a hot section steam isolation valve group of the No. 1 boiler to prevent steam from flowing back to the stopped boiler; opening a main steam communication main pipe control and isolation valve group of the boiler, and supplying main steam to the No. 1 steam turbine and the steam turbine of the unit by the boilers of other units at the same time; opening a control and isolation valve group of a reheating cold section steam communication main pipe, enabling the cold reheating steam of the No. 1 unit to enter the reheating cold section steam communication main pipe, and heating the reheating cold section steam of the No. 1 unit by boilers of other units; opening a reheating hot section steam communication main pipe control and isolation valve group, and supplying reheating hot section steam to the No. 1 steam turbine and a middle pressure cylinder of the unit by boilers of other units; the high-pressure cylinder of the No. 1 machine does not extract steam, and the high-pressure heater system does not work; the machine No. 1 does not perform three-stage steam extraction, and the third-stage high-pressure heater does not work; steam enters a condenser after passing through a low-pressure cylinder, condensed water is conveyed to a low-pressure heater system through a condensed water pump and then enters a deaerator after being heated; and closing the isolation and control valve group behind the water feeding pump, opening the isolation and control valve group of the water inlet communication main pipe of the high-pressure heater system, conveying the feed water to the water inlet communication main pipe of the high-pressure heater system through the water feeding pump, and then conveying the feed water to the high-pressure heater systems of other units for heating.
5. The method of claim 4, wherein the boiler shutdown is during boiler maintenance, failure, two-shift operation of the unit, hot standby state of the unit, and all other situations where there is a planned or unexpected shutdown of the boiler equipment.
6. The method of claim 4, wherein the valve bank refers to a regulator valve used in the method.
7. The method of claim 4, wherein the valve block is an isolation valve used.
8. The method for operating a bus connection system for regulating the work of a high-pressure cylinder as claimed in claim 6 or 7, wherein the valves are electrically, pneumatically, hydraulically and manually operated.
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| CN202110448371.6A CN113175363A (en) | 2021-04-25 | 2021-04-25 | Master pipe connection system for adjusting high-pressure cylinder to do work and operation method |
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| CN202110448371.6A CN113175363A (en) | 2021-04-25 | 2021-04-25 | Master pipe connection system for adjusting high-pressure cylinder to do work and operation method |
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Cited By (5)
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| CN113586188A (en) * | 2021-09-02 | 2021-11-02 | 贵州电网有限责任公司 | Thermal power plant two-machine coordination depth peak regulation method |
| CN113586184A (en) * | 2021-09-01 | 2021-11-02 | 贵州电网有限责任公司 | Deep peak regulation method based on main reheating steam communication of thermal power plant |
| CN114458405A (en) * | 2021-11-15 | 2022-05-10 | 国家能源集团科学技术研究院有限公司 | Multi-unit cooperative steam power generation system |
| CN114876594A (en) * | 2022-06-17 | 2022-08-09 | 西安热工研究院有限公司 | Heat storage and peak regulation system based on desalting water tank waste utilization and operation method |
| CN115234327A (en) * | 2022-08-08 | 2022-10-25 | 济南达能动力技术有限责任公司 | Unit unit cooperative operation method and system |
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2021
- 2021-04-25 CN CN202110448371.6A patent/CN113175363A/en not_active Withdrawn
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| CN113586184A (en) * | 2021-09-01 | 2021-11-02 | 贵州电网有限责任公司 | Deep peak regulation method based on main reheating steam communication of thermal power plant |
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| CN113586188A (en) * | 2021-09-02 | 2021-11-02 | 贵州电网有限责任公司 | Thermal power plant two-machine coordination depth peak regulation method |
| CN113586188B (en) * | 2021-09-02 | 2024-04-26 | 贵州电网有限责任公司 | Method for coordinating deep peak regulation of two machines of thermal power plant |
| CN114458405A (en) * | 2021-11-15 | 2022-05-10 | 国家能源集团科学技术研究院有限公司 | Multi-unit cooperative steam power generation system |
| CN114458405B (en) * | 2021-11-15 | 2024-01-26 | 国家能源集团科学技术研究院有限公司 | Multi-unit cooperative steam power generation system |
| CN114876594A (en) * | 2022-06-17 | 2022-08-09 | 西安热工研究院有限公司 | Heat storage and peak regulation system based on desalting water tank waste utilization and operation method |
| CN114876594B (en) * | 2022-06-17 | 2024-01-23 | 西安热工研究院有限公司 | Heat storage peak shaving system based on old brine removal tank and operation method |
| CN115234327A (en) * | 2022-08-08 | 2022-10-25 | 济南达能动力技术有限责任公司 | Unit unit cooperative operation method and system |
| CN115234327B (en) * | 2022-08-08 | 2023-03-10 | 济南达能动力技术有限责任公司 | Unit set cooperative operation method and system |
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