CN113175365A - Bus pipe connection system for improving unit flexibility and operation method - Google Patents
Bus pipe connection system for improving unit flexibility and operation method Download PDFInfo
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- CN113175365A CN113175365A CN202110449556.9A CN202110449556A CN113175365A CN 113175365 A CN113175365 A CN 113175365A CN 202110449556 A CN202110449556 A CN 202110449556A CN 113175365 A CN113175365 A CN 113175365A
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a main pipe connection system for improving the flexibility of a turbine set and an operation method thereof. The additional system connects the main steam, the reheating cold section steam, the reheating hot section steam, the intermediate pressure cylinder exhaust steam, the low pressure cylinder exhaust steam and the final water supply to the corresponding main pipes respectively. When partial unit boilers are shut down, are in hot standby or are in two-shift operation, the steam turbines of the blowing-out unit can obtain main and reheat steam by controlling the main pipes and the inter-unit connecting valve group, the cold reheat steam of the blowing-out unit is recycled, blowing-out is not stopped, and in addition, a water feeding pump of the blowing-out unit does not work, so that more energy is saved. 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 operating boiler.
Description
Technical Field
The invention belongs to the field of thermal power generation, and particularly relates to a main pipe connection system for improving the flexibility of a unit and an operation method.
Background
At present, the proportion of thermal power generating units in the domestic power market is still large, however, the new energy development is different day by day, the installed capacity is increased year by year, and the total load demand of the power market is increased slowly. In order to absorb and absorb the generated energy of the new energy unit which is increasing day by day, the power grid puts higher requirements on the deep peak regulation capability of the thermal power generation enterprise unit,
in order to meet the peak regulation requirement of a power grid, a large number of thermal power generating units are flexibly transformed. The flexibility modification of the existing common thermal power generating units is divided into a boiler stable combustion technology and a unit thermoelectric decoupling technology according to different characteristics of a heating period and a non-heating period. The boiler combustion stabilizing technology is mainly a main technical means for carrying out deep peak regulation on a unit in a non-heat supply state, and comprises an ultra-low load combustion stabilizing technology of a boiler and an operation optimization technology under a low-load working condition. The thermoelectric decoupling technology has two routes: firstly, a storage type system is adopted, such as a hot water heat storage tank, a heat storage type electric boiler and the like; secondly, a non-heat storage system is adopted, such as a low-pressure cylinder cut-off steam inlet heat supply technology, a bypass heat supply technology and the like
The low-load stable combustion technology of the boiler is generally realized by adopting modes of low-load refined combustion adjustment, optimized modification of a combustor and a pulverizing system, improvement of coal quality entering a boiler and the like, but in the whole, the space for further reducing the load of a unit is limited by factors such as poor filling degree of flame in the boiler, difficult stable combustion of pulverized coal in the boiler and the like during low-load operation of the boiler.
The thermoelectric decoupling technology provides more heat user demands for the periphery of a power plant, and the flexibility requirements of a unit under a pure condensing operation condition cannot be met.
Therefore, the scheme for remarkably improving the flexibility of the unit and the peak regulation capability of the unit under the unit pure condensation working condition is researched and developed, and the method has important significance for future development of the thermal power unit.
Disclosure of Invention
The invention aims to provide a main pipe connection system and an operation method for improving the flexibility of a unit, so that the flexibility of the unit under the deep peak shaving operation condition and the unit power generation amount under the accident state of boiler equipment are improved.
The invention is realized by adopting the following technical scheme:
a main pipe connection system for improving the flexibility of a turbine set comprises a steam-water system of the 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 deaerator 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 group 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 deaerator is intake and is communicated the female intake pipe of the deaerator to connect each unit, the tie point is on the water supply line between low-pressure heater system and deaerator, tie point to deaerator intake and communicate to set up the unit to the deaerator to intake and communicate the female control of pipe, isolation valve group between the water inlet of tie point and deaerator, set up the deaerator and intake control, isolation valve group between tie point and deaerator water inlet.
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.
A method for operating a bus control connection system for improving unit flexibility is disclosed, which takes the shutdown of a unit boiler of No. 1 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; no. 1 machine high pressure cylinder does not extract steam, and the high pressure heater system does not work; no. 1 machine medium pressure cylinder does not extract steam, and the deaerator does not work; the steam works through a steam turbine and then enters a condenser, and condensed water is pumped to a low-pressure heater system through a condensed water pump to be heated; and opening a deaerator water inlet communication main pipe control and isolation valve group, closing the deaerator water inlet control and isolation valve group, and conveying the condensed water at the water outlet of the low-pressure heater system to deaerators of other units to enter the steam-water circulation of the other units.
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 boiler and the steam turbine can realize the operation of a machine-furnace decoupling mode, namely the steam turbine still has the power generation capacity under the condition that a certain boiler is stopped;
(2) by adopting the method, under the condition that a certain boiler is stopped, the high-pressure heater and the deaerator of a certain steam turbine can be completely withdrawn from operation, the high-pressure cylinder of the steam turbine can realize non-extraction operation, the low-pressure heater can normally operate, and the condensed water is conveyed to the deaerator of other units for heating through the communicating pipe arranged at the outlet of the low-pressure heater. By the system setting and operating method, load adjustment and distribution of multiple units in a deep peak shaving environment can be realized, and flexibility of the units in the deep peak shaving environment is 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, the water inlet of the deaerator is communicated with a main pipe control and isolation valve bank,
vn-11, a deaerator water inlet control valve and an isolation valve group.
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 improving the flexibility of the unit provided by the invention comprises a conventional boiler, a steam-water system of a steam turbine unit 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, the deaerator water inlet communication main pipe and the corresponding control and shutoff valve group.
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 connecting mode of the deaerator water inlet communication main pipe in the additionally-arranged system is as follows: the deaerator water inlet communication main pipe is connected with deaerator water inlet pipelines of all units, a connection point is arranged on a water supply pipeline between the low-pressure heater system and the deaerator, and a single machine to deaerator water inlet communication main pipe control and isolation valve bank Vn-10 is arranged between the connection point and the deaerator water inlet communication main pipe. A deaerator water inlet control and isolation valve bank Vn-11 is arranged between the connecting point and the deaerator water inlet.
The invention provides an operation method for interconnecting boilers and steam turbines among different units, which takes the shutdown of a boiler of a unit No. 1 in a plurality of units as an example and comprises 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; no. 1 machine high pressure cylinder does not extract steam, and the high pressure heater system does not work; no. 1 machine medium pressure cylinder does not extract steam, and the deaerator does not work; the steam of the No. 1 unit is fed into a condenser after being worked by a steam turbine, and condensed water is sent to a low-pressure heater system for heating through a condensed water pump P1-2; and opening a deaerator water inlet communication main pipe control and isolation valve group V1-10, closing a deaerator water inlet control and isolation valve group V1-11, and conveying the condensed water at the water outlet of the low-pressure heater system to deaerators of other units to enter the steam-water circulation of the other units. The No. 1 unit feed pump P1-1 is not operating.
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.
By adopting the method, the unit can realize further machine-furnace decoupling under the operation condition of less furnaces and multiple machines, and the output power rate of the steam turbine generator unit under the operation condition of deep peak shaving is further reduced under the normal operation condition of the operating boiler. By using the invention, under the operating condition of deep peak regulation, the deaerator and the high-pressure heat recovery system of the blowing-out unit can be out of work, all steam exhausted by the pressure cylinder in the blowing-out unit enters the low-pressure cylinder, so that the air input of the low-pressure cylinder is improved, and the actual operating efficiency of the low-pressure cylinder averaged by a plurality of units is improved. In addition, a water feeding pump of the furnace blowing unit does not work, and the operation is more energy-saving.
Claims (8)
1. A main pipe connection system for improving the flexibility of a turbine unit is characterized by comprising a steam-water system of the turbine unit 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 deaerator 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 group 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 deaerator is intake and is communicated the female intake pipe of the deaerator to connect each unit, the tie point is on the water supply line between low-pressure heater system and deaerator, tie point to deaerator intake and communicate to set up the unit to the deaerator to intake and communicate the female control of pipe, isolation valve group between the water inlet of tie point and deaerator, set up the deaerator and intake control, isolation valve group between tie point and deaerator water inlet.
2. The header pipe connection system for improving the flexibility of a unit according to claim 1, wherein the steam-water system of the steam turbine unit comprises boilers 1, 2, … …, n, an outlet of a superheated steam pipeline of each boiler is communicated with a steam inlet of a high-pressure cylinder, a steam outlet of a high-pressure cylinder is communicated with an inlet of a reheated steam pipeline of each boiler, an outlet of a reheated steam pipeline of each boiler is communicated with a steam inlet of an intermediate-pressure cylinder, a steam outlet of the intermediate-pressure cylinder is communicated with a steam inlet of a 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 a 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 a low-pressure heating system, the condenser, a condensate pump, the low-pressure heating system, the deaerator, a water-feeding pump are sequentially communicated with water inlets and water inlets 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 bus pipe connection system for improving the flexibility of the unit as claimed in claim 1, wherein when there are only two units, the two units are connected by using a communication pipe equipped with an isolation and control valve group.
4. An operation method of a bus control connection system for improving unit flexibility is characterized in that the method is based on the bus control connection system for improving unit flexibility in any one of claims 1 to 3, and taking the shutdown of a boiler of a unit No. 1 in a plurality of units as an example, the method 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; no. 1 machine high pressure cylinder does not extract steam, and the high pressure heater system does not work; no. 1 machine medium pressure cylinder does not extract steam, and the deaerator does not work; the steam works through a steam turbine and then enters a condenser, and condensed water is pumped to a low-pressure heater system through a condensed water pump to be heated; and opening a deaerator water inlet communication main pipe control and isolation valve group, closing the deaerator water inlet control and isolation valve group, and conveying the condensed water at the water outlet of the low-pressure heater system to deaerators of other units to enter the steam-water circulation of the other units.
5. The method for operating the main control connection system for improving the flexibility of the unit according to claim 4, wherein the boiler shutdown refers to the condition that the boiler is overhauled, failed, operated in two shifts, in hot standby of the unit, and all other conditions that the boiler equipment is shut down in a plan or accident manner.
6. The method of claim 4, wherein the valve set is a control valve.
7. The method of claim 4, wherein the valve set is an isolation valve.
8. The method for operating a master connection system for improving flexibility of a unit according to claim 6 or 7, wherein the valves are electrically, pneumatically, hydraulically or manually operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449556.9A CN113175365A (en) | 2021-04-25 | 2021-04-25 | Bus pipe connection system for improving unit flexibility and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449556.9A CN113175365A (en) | 2021-04-25 | 2021-04-25 | Bus pipe connection system for improving unit flexibility and operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113175365A true CN113175365A (en) | 2021-07-27 |
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ID=76926564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110449556.9A Withdrawn CN113175365A (en) | 2021-04-25 | 2021-04-25 | Bus pipe connection system for improving unit flexibility and operation method |
Country Status (1)
| Country | Link |
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| CN (1) | CN113175365A (en) |
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2021
- 2021-04-25 CN CN202110449556.9A patent/CN113175365A/en not_active Withdrawn
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Application publication date: 20210727 |