CN112377882A - Nuclear power station starting boiler and emergency generator combined working system - Google Patents
Nuclear power station starting boiler and emergency generator combined working system Download PDFInfo
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- CN112377882A CN112377882A CN202011088893.1A CN202011088893A CN112377882A CN 112377882 A CN112377882 A CN 112377882A CN 202011088893 A CN202011088893 A CN 202011088893A CN 112377882 A CN112377882 A CN 112377882A
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- Prior art keywords
- flue gas
- boiler
- nuclear power
- diesel engine
- waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
- F22B1/1815—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines using the exhaust gases of gas-turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
- F02G5/04—Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/04—Safety arrangements
- G21D3/06—Safety arrangements responsive to faults within the plant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Plasma & Fusion (AREA)
- High Energy & Nuclear Physics (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a combined working system of a nuclear power station start boiler and an emergency generator, which comprises: a diesel engine; the flue gas waste heat boiler is connected with the diesel engine through a pipeline, and water in the flue gas waste heat boiler is heated by flue gas from the diesel engine and is sent into an auxiliary steam pipeline after being changed into steam; after the water is added into the cylinder liner water cooler, the water is added and heated by the cylinder liner water of the diesel engine, and the water enters the flue gas waste heat boiler to be continuously heated by the flue gas; the chimney is connected with the flue gas waste heat boiler through a pipeline and discharges the flue gas from the flue gas waste heat boiler to the outside; and the generator is connected with the diesel engine and is respectively connected with the emergency bus and the station power supply circuit after passing through the transformer. Compared with the prior art, the high-temperature flue gas generated by the emergency diesel generator is recycled, so that the operation economy of the nuclear power station is improved; the flue gas exhaust-heat boiler provides high-temperature steam, replaces a starting boiler or an auxiliary boiler used by the existing nuclear power station, and saves the manufacturing cost of a boiler house and boiler equipment.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a combined working system of a nuclear power plant starting boiler and an emergency generator.
Background
The safety is the life line of the nuclear power station, and multiple redundancy and protection are configured on the nuclear power station equipment according to the design principle of deep defense. The power supply is a power source for the operation of nuclear power station equipment, and the reliability of the power supply is important for the safety of the nuclear power station. In order to ensure the high reliability of a power supply system of the nuclear power station, the nuclear power station is provided with emergency power supplies for important electric equipment or equipment with special requirements, and meanwhile, the emergency power supplies are arranged in a multiple and independent mode so as to avoid the situation that the emergency power supplies are unavailable due to common mode faults.
The new-built nuclear power station needs auxiliary steam when being started, and the auxiliary steam is mainly used for deaerating steam of a deaerator, steam for a steam turbine shaft seal, steam purging and pipe warming before starting and the like. The nuclear power plant is generally built in a remote suburb, no steam source is arranged nearby, and steam can be generated by using an adjacent furnace unlike an extension unit, so that the problem can be solved only by building and starting a boiler.
The auxiliary steam system plays an important role in a power station, and starting a boiler is an important component of the auxiliary steam system in a newly-built power plant. The auxiliary boiler, although not a device directly related to nuclear safety, has no safety function, but during start-up, normal and shut-down, unit load shedding of the nuclear power plant, when the steam converter system is not operational or not satisfactory, it will provide saturated auxiliary steam for all of the oxygen removal and heating loads of the plant and is therefore also a very important system of the plant.
When the nuclear power station normally operates, the station alternating current power supply is supplied with power by the main generator. When the main generator breaks down, the station AC power supply is provided by the main power supply outside the station through the main transformer. When the generator power supply and the off-plant main power supply are lost simultaneously, the off-plant auxiliary power supply is switched by the switching device and is supplied with power by the auxiliary transformer. When the working condition that the power supply outside the plant is unavailable occurs, the emergency power supply inside the plant supplies power to the emergency plant equipment, and when the working condition that the power supply is cut off from the whole plant occurs, the power supply which deals with the power cut off from the whole plant supplies power, so that the power supply to important safety loads is recovered as soon as possible, the discharge capacity of the reactor type waste heat and the effective isolation of the containment are kept, the accident consequence is relieved, and the possible failure of the containment is prevented.
The emergency power supply system of the existing nuclear power station mainly comprises a diesel generator and an additional diesel generator in a plant site, wherein an emergency diesel engine is an independent emergency power supply in a nuclear power station plant, and each nuclear power unit comprises two emergency power supplies. In addition, an additional backup diesel generator set is also configured on one nuclear power plant site, and the equipment capacity is consistent with that of the emergency diesel generator set. After the accident of the Japanese Fudao, in order to improve the reliability and the depth defense capability of the station-wide power supply, a mobile diesel generator set is additionally arranged to be used as a temporary power supply of the station-wide power supply accident.
At present, the starting boiler of the auxiliary steam system of the nuclear power station comprises an oil-fired boiler and an electric boiler. As the nuclear power station belongs to a project with extremely high safety, once the power station is put into operation, the frequency and the time for starting the boiler are very little. The electric boiler has obvious advantages in the aspects of safety, starting time, plant layout, convenience in operation, environmental protection and the like, but has the main defect of high running cost.
For oil fired boilers, diesel fuel is less costly, but the disadvantages of oil fired boilers include: the equipment is slow to start, and the low-load operation performance is poor; the auxiliary system has more equipment and is complicated to operate; the high-temperature-resistant steel pipe has the advantages of high wearing and corrosion resistance, complex maintenance work and working environment, and the overhaul is required for 1 time every year. In addition, emergency diesel engines emit large amounts of waste heat during operation and during periodic testing, and the economics of this portion of the heat cannot be recovered.
In view of the above, it is necessary to provide an economical and reliable combined working system of a nuclear power plant start-up boiler and an emergency generator.
Disclosure of Invention
The invention aims to: the defects of the prior art are overcome, and an economical and reliable combined working system of the nuclear power station starting boiler and the emergency generator is provided.
In order to achieve the above object, the present invention provides a combined working system of a nuclear power plant startup boiler and an emergency generator, comprising:
a diesel engine;
the flue gas waste heat boiler is connected with the diesel engine through a pipeline, and water in the flue gas waste heat boiler is heated by flue gas from the diesel engine and is sent into an auxiliary steam pipeline after being changed into steam;
the cylinder liner water cooler is used for feeding the water to the cylinder liner water cooler, and the diesel engine cylinder liner water heats the water and enters the flue gas waste heat boiler to be continuously heated by the flue gas;
the chimney is connected with the flue gas waste heat boiler through a pipeline and discharges the flue gas from the flue gas waste heat boiler to the outside; and
and the generator is connected with the diesel engine and is respectively connected with the emergency bus and the station power supply circuit after passing through the transformer.
As an improvement of the combined working system of the start-up boiler and the emergency generator of the nuclear power plant, the temperature of the flue gas discharged by the diesel engine is as high as 530 ℃.
As an improvement of the combined working system of the start-up boiler and the emergency generator of the nuclear power plant, the temperature of the flue gas discharged through the chimney is not more than 120 ℃.
As an improvement of the combined working system of the starting boiler and the emergency generator of the nuclear power station, the temperature of the water supplement in the cylinder liner water cooler is 5-45 ℃.
As an improvement of the combined working system of the starting boiler and the emergency generator of the nuclear power station, a smoke inlet pipeline of the smoke waste heat boiler is provided with a smoke bypass.
As an improvement of the combined working system of the starting boiler and the emergency generator of the nuclear power station, a smoke three-way valve is arranged at a connecting pipe of the smoke bypass connected with the diesel engine.
As an improvement of the combined working system of the starting boiler and the emergency generator of the nuclear power station, two flue gas regulating valves are arranged at the connecting pipe of the flue gas bypass connected with the diesel engine.
As an improvement of the combined working system of the starting boiler and the emergency generator of the nuclear power station, the flue gas of the flue gas waste heat boiler and the flue gas bypass is discharged to the outside through the chimney.
As an improvement of the combined working system of the starting boiler and the emergency generator of the nuclear power station, after the internal and external power supply of the nuclear power station is lost, the diesel engine is independently started, and the emergency power supply is provided for the nuclear power station through the emergency bus.
In the periodic test stage of the diesel engine, the power generated by the diesel engine is supplied to equipment in a plant through a service line or is sent to a power grid.
Compared with the prior art, the combined working system of the starting boiler and the emergency generator of the nuclear power station has the beneficial technical effects that:
firstly, the high-temperature flue gas generated by the emergency diesel generator is recycled, and the operation economy of the nuclear power station is improved.
And secondly, the flue gas waste heat boiler can provide high-temperature steam and can replace a starting boiler or an auxiliary boiler used by the conventional nuclear power station, so that the manufacturing cost of a boiler house and the manufacturing cost of boiler equipment are saved.
Drawings
The combined operation system of the start-up boiler and the emergency generator of the nuclear power plant of the present invention is described in detail below with reference to the accompanying drawings and the specific embodiments, wherein:
FIG. 1 is a schematic diagram of a combined operation system of a start-up boiler and an emergency generator of a nuclear power plant according to the present invention.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the present invention provides a combined working system of a nuclear power plant start-up boiler and an emergency generator, which includes:
a diesel engine 10;
the flue gas waste heat boiler 20 is connected with the diesel engine 10 through a pipeline, and water in the flue gas waste heat boiler 20 is heated by flue gas from the diesel engine 10 and is sent into the auxiliary steam pipeline 100 after being changed into steam;
the cylinder liner water cooler 30 is used for feeding the supplemented water into the cylinder liner water cooler 30, and the diesel engine cylinder liner water heats the supplemented water and enters the flue gas waste heat boiler 20 to be continuously heated by the flue gas;
a chimney 40 connected to the flue gas waste heat boiler 20 through a pipeline for discharging the flue gas from the flue gas waste heat boiler 20 to the outside; and
the generator 50 is connected with the diesel engine 10, and is connected with the emergency bus 70 and the service line 80 respectively after passing through the transformer 60.
According to one embodiment of the combined operation system of the nuclear power plant start-up boiler and the emergency generator, high temperature flue gas (up to 530 ℃) discharged from the diesel engine 10 enters the flue gas waste heat boiler 20 to heat water into steam, and the steam is sent to the auxiliary steam pipeline 100 and can be used as auxiliary steam for production of the nuclear power plant. In the process, electricity and heat can be generated, so that combined heat and power supply is realized, and only low-temperature flue gas (such as 120 ℃) is discharged to the outside, and sulfur and other harmful substances are not contained. The flue gas waste heat boiler 20 can generate high-temperature and high-pressure steam to meet different working requirements.
And (3) adding water (at the temperature of 5-45 ℃) into the cylinder liner water cooler 30, heating the added water by using the cylinder liner water of the diesel engine in the cylinder liner water cooler 30, and adding the added water into the flue gas waste heat boiler 20 to be continuously heated by flue gas.
According to one embodiment of the combined working system of the nuclear power plant start-up boiler and the emergency generator of the present invention, the smoke inlet pipeline of the smoke waste heat boiler 20 is provided with a smoke bypass, the connecting pipe thereof is provided with a smoke three-way valve 90, and two smoke regulating valves can be adopted to replace a three-way regulating valve. The flue gas discharged by the diesel engine 10 passes through a smoke discharge pipe, a flue gas three-way regulating valve 90, a flue gas waste heat boiler 20 or a flue gas bypass, and is finally sent into a chimney 40 to be discharged outside.
In the illustrated embodiment, the power generated by the generator 50 may be transmitted to the emergency bus 70 or the service line 80 via the transformer 60 according to different working conditions.
Referring to fig. 1, the working principle of the combined working system of the start-up boiler and the emergency generator of the nuclear power plant of the present invention is as follows:
1. the steam for starting the nuclear power station can be obtained by heating high-temperature flue gas in the flue gas waste heat boiler 20 in the diesel engine-flue gas waste heat boiler system to generate steam. At this time, the flue gas three-way valve 90 is cut into the inlet pipe of the flue gas waste heat boiler 20, and the flue gas is sent to the chimney 40 after being discharged in the flue gas waste heat boiler 20. The power generated by the diesel engine 10 is supplied to the equipment in the plant for use through the service power line 80;
2. after the nuclear power plant loses internal and external power supply, the diesel engine 10 can be independently started to provide emergency power supply for the nuclear power plant through the emergency bus 70. At this time, the flue gas three-way valve 90 is cut into the flue gas bypass, and the flue gas directly enters the chimney 40;
3. in the periodic test stage of the diesel engine, the power generated by the diesel engine is supplied to the in-plant equipment through the in-plant power line 70 and can be sent to the power grid according to the condition. At this time, the flue gas three-way valve 90 is cut into the inlet pipeline of the flue gas waste heat boiler 20, the flue gas is sent to the chimney 40 after being heated in the flue gas waste heat boiler 20, and the produced steam is sent to the auxiliary steam pipeline 100 for users in the plant to use.
In combination with the above detailed description of the specific embodiment of the present invention, it can be seen that, compared with the prior art, the technical effects of the combined working system of the start-up boiler and the emergency generator of the nuclear power plant of the present invention include:
firstly, the high-temperature flue gas generated by the emergency diesel generator is recycled, and the operation economy of the nuclear power station is improved.
Secondly, the flue gas exhaust-heat boiler 20 can provide high-temperature steam and can replace a starting boiler or an auxiliary boiler used by the existing nuclear power station, so that the manufacturing cost of a boiler house and the manufacturing cost of boiler equipment are saved.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. The utility model provides a nuclear power station starts boiler and emergency generator combined operation system which characterized in that includes:
a diesel engine;
the flue gas waste heat boiler is connected with the diesel engine through a pipeline, and water in the flue gas waste heat boiler is heated by flue gas from the diesel engine and is sent into an auxiliary steam pipeline after being changed into steam;
the cylinder liner water cooler is used for feeding the water to the cylinder liner water cooler, and the diesel engine cylinder liner water heats the water and enters the flue gas waste heat boiler to be continuously heated by the flue gas;
the chimney is connected with the flue gas waste heat boiler through a pipeline and discharges the flue gas from the flue gas waste heat boiler to the outside; and
and the generator is connected with the diesel engine and is respectively connected with the emergency bus and the station power supply circuit after passing through the transformer.
2. The combined nuclear power plant start-up boiler and emergency generator operating system of claim 1, wherein the temperature of the flue gas exiting the diesel engine is up to 530 degrees celsius.
3. The combined nuclear power plant start-up boiler and emergency generator operating system of claim 1, wherein the temperature of the flue gas discharged through the stack does not exceed 120 degrees celsius.
4. The combined operating system of a nuclear power plant startup boiler and an emergency generator as claimed in claim 1, wherein the temperature of the make-up water in the liner water cooler is 5-45 degrees celsius.
5. The combined work system of the nuclear power plant starting boiler and the emergency generator as claimed in claim 1, wherein a flue gas bypass is arranged on a flue gas inlet pipeline of the flue gas waste heat boiler.
6. The combined work system of the nuclear power plant starting boiler and the emergency generator as claimed in claim 5, wherein a flue gas three-way valve is arranged at a connecting pipe of the flue gas bypass connected with the diesel engine.
7. The combined work system of the nuclear power plant starting boiler and the emergency generator as claimed in claim 5, wherein two flue gas regulating valves are arranged at the connecting pipe of the flue gas bypass connecting diesel engine.
8. The combined work system of the nuclear power plant start-up boiler and the emergency generator as claimed in claim 5, wherein the flue gas of the flue gas waste heat boiler and the flue gas bypass is discharged to the outside through the chimney.
9. The combined nuclear power plant startup boiler and emergency generator operating system of claim 1, wherein the diesel engine starts up independently after the nuclear power plant loses internal and external power supply, providing emergency power supply to the nuclear power plant via the emergency bus.
10. The combined work system of the nuclear power plant starting boiler and the emergency generator as claimed in claim 1, wherein in the periodic test phase of the diesel engine, the electricity generated by the diesel engine is supplied to the plant equipment or is sent to the power grid through a plant service line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011088893.1A CN112377882A (en) | 2020-10-13 | 2020-10-13 | Nuclear power station starting boiler and emergency generator combined working system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011088893.1A CN112377882A (en) | 2020-10-13 | 2020-10-13 | Nuclear power station starting boiler and emergency generator combined working system |
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| CN112377882A true CN112377882A (en) | 2021-02-19 |
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| CN202011088893.1A Pending CN112377882A (en) | 2020-10-13 | 2020-10-13 | Nuclear power station starting boiler and emergency generator combined working system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110115559A (en) * | 2011-09-30 | 2011-10-21 | 전찬구 | Method and equipment of emergency electric power generation for nuclear power plant |
| WO2013035921A1 (en) * | 2011-09-08 | 2013-03-14 | 한전원자력연료 주식회사 | Apparatus for charging atomic power plant emergency battery by using thermoelectric generation element |
| CN103925025A (en) * | 2014-04-18 | 2014-07-16 | 哈尔滨工程大学 | Waste heat recovery device for marine diesel engine exhaust |
| CN103967648A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨工程大学 | Comprehensive waste heat recovery system of ship low-speed diesel engine |
| CN208858456U (en) * | 2018-07-26 | 2019-05-14 | 中广核工程有限公司 | A kind of nuclear power station auxiliary steam and emergency power supply joint supply system |
-
2020
- 2020-10-13 CN CN202011088893.1A patent/CN112377882A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013035921A1 (en) * | 2011-09-08 | 2013-03-14 | 한전원자력연료 주식회사 | Apparatus for charging atomic power plant emergency battery by using thermoelectric generation element |
| KR20110115559A (en) * | 2011-09-30 | 2011-10-21 | 전찬구 | Method and equipment of emergency electric power generation for nuclear power plant |
| CN103925025A (en) * | 2014-04-18 | 2014-07-16 | 哈尔滨工程大学 | Waste heat recovery device for marine diesel engine exhaust |
| CN103967648A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨工程大学 | Comprehensive waste heat recovery system of ship low-speed diesel engine |
| CN208858456U (en) * | 2018-07-26 | 2019-05-14 | 中广核工程有限公司 | A kind of nuclear power station auxiliary steam and emergency power supply joint supply system |
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Application publication date: 20210219 |