CN105783579B - Cooling stack Expanding Unit Element System operating system and operation method - Google Patents
Cooling stack Expanding Unit Element System operating system and operation method Download PDFInfo
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- CN105783579B CN105783579B CN201610300089.2A CN201610300089A CN105783579B CN 105783579 B CN105783579 B CN 105783579B CN 201610300089 A CN201610300089 A CN 201610300089A CN 105783579 B CN105783579 B CN 105783579B
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- 238000001816 cooling Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 100
- 239000000498 cooling water Substances 0.000 claims abstract description 15
- 230000004087 circulation Effects 0.000 claims description 35
- 239000003643 water by type Substances 0.000 claims description 5
- 238000005457 optimization Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
Abstract
The present invention provides a kind of cooling stack Expanding Unit Element System operating system and operation method, and cooling water return is arranged between two cooling towers and gets in touch with pipeline and recirculated water return water communicating door；Two cooling towers are provided with flow controllable register on cooling water return pipe road respectively.The present invention realizes the connection between two cooling stacks, the cooling stack connection for the other unit that would sit idle under thermal power plant's single power set running state, realize the mode of two tower of a machine, cooling tower cooling capacity when being equal to the operation of original unit style doubles, the recirculated water outlet water temperature of cooling stack can be effectively reduced, condenser vacuum is improved, the performance driving economy of thermal power plant is improved.
Description
Technical field
The invention belongs to cooling stack technical fields, and in particular to a kind of cooling stack Expanding Unit Element System
Operating system and operation method.
Background technique
Cooling stack is the important equipment of fired power generating unit cold end system, and cooling performance has condenser vacuum
Important influence.The generally existing problem inadequate to cooling stack attention degree of thermal power plant at present, daily maintenance investment
Energy and material resources it is less, the cooling performance of cooling stack is low compared with design value.
With gradually going deep into for energy saving for power plants emission reduction work, fired power generating unit cold end system has biggish optimization.These
Optimization is mainly reflected in: 1, two unit water circulating pumps export main pipe connection；2, the high low speed transformation of water circulating pump and optimization operation；
3, the optimization of cooling stack filler and water distribution.
Recently as the rapid expansion of China's fired power generating unit installed capacity, the rate of economic development slows down, fired power generating unit year
Declined using hourage, the case where many power plant units the using and the reserved gradually increases.
There is also the units of difference, especially two to share for the cooling performance of two cooling stacks of same power plant
Three water circulating pumps will appear the situation of tower water unevenness, often when water circulating pump exports main pipe connection so as to cause two
The economic indicators such as the recirculated water disengaging tower temperature difference of cooling stack and cooling panel height differ greatly.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of cooling stack Expanding Unit Element System operating system and operation
Method realizes the mode of two tower of a machine, and cooling tower cooling capacity when being equal to the operation of original unit style doubles, can be with
The recirculated water outlet water temperature of cooling stack is effectively reduced, cooling panel height is reduced, improves condenser vacuum, improve thermoelectricity
Factory's performance driving economy.
The present invention provides the following technical solutions:
A kind of cooling stack Expanding Unit Element System operating system,
Including two groups or circulation more than two, and the attachment device being arranged between circulation,
The attachment device includes the cooling water return contact pipeline being arranged between two circulations, the contact of recirculated water return water
Door；The cooling water return pipe road setting flow controllable register of every group of circulation.
It is mainly made of the first unit circulation and the second unit circulation, any group of circulation
Include:
Recirculated water return water communicating door, flow controllable register, cooling tower, tower basin, the tower basin outlet strainer, filter being sequentially connected
Net, headstock gear follow pump, hydraulic butterfly valve, follow pump discharge communicating door, condenser and condenser exit butterfly valve, by following between two groups
It ring water return water communicating door, flow controllable register and follows pump discharge communicating door and is connected.
The first unit circulation includes the first circulation water return water communicating door being sequentially connected, first flow adjusting
Baffle, the first cooling tower, the first tower basin, the first tower basin export strainer；
First tower basin outlet strainer followed respectively with the first strainer, the first headstock gear, first pump, the first hydraulic butterfly valve and
Second strainer, the second headstock gear, second follow pump, the second hydraulic butterfly valve is connected, then common connection first follows pump discharge contact
Door, the first condenser and the first condenser exit butterfly valve；
Form the first unit circulation.
The second unit circulation includes the second circulation water return water communicating door being sequentially connected, second flow adjusting
Baffle, the second cooling tower, the second tower basin, the second tower basin export strainer；
Second tower basin outlet strainer followed respectively with third strainer, third headstock gear, third pump, third hydraulic butterfly valve and
4th strainer, the 4th headstock gear, the 4th follow pump, the 4th hydraulic butterfly valve is connected, then common connection second follows pump discharge contact
Door, the second condenser and the second condenser exit butterfly valve；
Form the second unit circulation.
The angle of the flow controllable register is adjusted to adjust flow.
Cooling water return is set between two cooling towers and gets in touch with pipeline and recirculated water return water communicating door；Two cooling towers point
Flow controllable register is provided with not on cooling water return pipe road.
The beneficial effects of the present invention are: the invention compared with current power plant circulating cooling water system, increase circulation it is cold
But water return water contact pipeline and contact valve realize the connection between two units, will under thermal power plant's single power set running state
The cooling stack connection of an idle other unit is got up, and is realized the mode of two tower of a machine, is equal to original list
Cooling tower cooling capacity when member system operation doubles, and the recirculated water that can effectively reduce cooling stack goes out tower water
Temperature reduces cooling panel height, improves condenser vacuum, improves thermal power plant's performance driving economy.
In addition, two cooling towers increase flow controllable register on cooling water return pipe road respectively.By adjusting flow tune
Baffle is saved, the flow of recirculated water to cooling tower is can control, by evenly distributing upper tower water, plays cooling tower to greatest extent
Cooling capacity, as far as possible reduction cooling tower leaving water temperature, improve condenser vacuum.If bent according to the cooling characteristics of cooling tower
The optimization distribution operation of cooling tower cooling water inflow then may be implemented in line completely, i.e. the good cooling tower inflow of cooling characteristics is more, cooling
The cooling tower inflow of characteristic difference is few.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention；
1 is first circulation water return water communicating door；2 be recirculated water return water communicating door B；3 be first flow controllable register；4 are
Second flow controllable register；5 be the first cooling tower；6 be the second cooling tower；7 be the first tower basin communicating door；8 join for the second tower basin
Network door；9 export strainer for the first tower basin；10 export strainer for the second tower basin；11 be the first strainer；12 be the second strainer；13 are
Third strainer；14 be the 4th strainer；15 be the first headstock gear；16 be the second headstock gear；17 be third headstock gear；18 open for the 4th
Close machine；19 follow pump for first；20 follow pump for second；21 follow pump for third；22 follow pump for the 4th；23 be the first hydraulic butterfly valve；24
For the second hydraulic butterfly valve；25 be third hydraulic butterfly valve；26 be the 4th hydraulic butterfly valve；27 be first circulation exit of pump communicating door；
28 second be to follow pump discharge communicating door；29 be the first condenser entrance butterfly valve；30 be the second condenser entrance butterfly valve；31 be first
Condenser；32 be the second condenser；33 be the first condenser exit butterfly valve；34 be the second condenser exit butterfly valve；
Fig. 2 is flow controllable register schematic diagram.
Specific embodiment
Cooling stack Expanding Unit Element System operating system as shown in Figure 1 can realize two by controlling to adjust
The optimization of cooling stack is run, and the cooling capacity of cooling tower is played to the full extent, to be lowered into condenser
Circulating water temperature improves condenser vacuum.
As shown in Fig. 2, M represents electric operator, the height of flow controllable register is H, width L, circulating water pipeline
Diameter is D.In order to guarantee that the flow controllable register of rectangle can be in 0-90 degree flexible modulation, flow tune inside circular pipeline
The size of section baffle must satisfy H2+L2< D2；The angle of flow controllable register and pipe centerline is θ, and θ can be from 0-90 degree
It adjusts, open state is 0 degree, and closing maximum angle is 90 degree, and when flow controllable register is closed to 90 degree, generation is maximum
Friction loss, corresponding flow are minimum discharges；When flow controllable register is closed to 0 degree, generate the smallest along journey
Drag losses, corresponding flow are maximum stream flows.
If attached in cooling tower as shown in Figure 1, be disposed with dry temperature sensor at 1, No. 2 cooling stack water outlet
Nearly arrangement wet and dry bulb temperature flowmeter sensor.
In formula: tW1For No. 1 cooling tower leaving water temperature, DEG C；tW2For No. 2 cooling tower leaving water temperatures, DEG C；t11、t12、t1nRespectively
If to be arranged in the dry temperature sensor test value of No. 1 cooling tower outlet, DEG C；t21、t22、t2nRespectively it is arranged in No. 2 cooling towers
If the dry temperature sensor test value of outlet, DEG C.
FG1=tW1-τ (3)
FG2=tW2-τ (4)
In formula: FG1For the cooling panel height of No. 1 cooling tower, DEG C；FG2For the cooling panel height of No. 2 cooling towers, DEG C, τ is environmental wet
Ball temperature.
Circulating water flow is an important parameter for influencing cooling stack thermal performance, works as cooling stack
Environmental parameter is constant, and in the case where certain into tower water temperature, with the increase of quantity of circulating water, outlet water temperature also be will increase.
When increasing the quantity of circulating water for entering circulating cooling tower, the air of tower gradually tends to be saturated out, if continuing after saturation
Increasing quantity of circulating water, outlet water temperature will increase quickly, this is because the caloric receptivity of air has been saturated, the heat that excessive hot water is released
Amount can not be reabsorbed by air.
The cooling panel height of general cooling Deethanizer design is no more than 8 DEG C, and the cooling panel height of cooling tower often reaches in actual motion
To 10-15 DEG C, i.e. the outlet circulating water temperature of cooling tower is 2-7 DEG C high compared with design value, so that Steam Turbine Condenser Vacuum reduces
About 0.6-2.4kPa, so that unit generation coal consumption increase about 1.2-4.8g/kWh.
It is further illustrated below with reference to embodiment:
Cooling stack Expanding Unit Element System operation is suitable for thermal power plant's single power set running state, at this time other one it is cold
But tower is idle.
Embodiment 1: assuming that No. 1 train unit system operates normally, No. 2 unit outages；
If the cooling panel height F of No. 1 cooling towerG1More than 8 DEG C, then illustrate that the cooling capacity of No. 1 cooling tower is insufficient, upper tower water
It has been more than the cooling capacity of No. 1 cooling tower, at this time can be by No. 1, No. 2 cooling towers are together in parallel, and realize 1 machine double tower；Because following
Ring water by No. 1 cooling tower to No. 2 cooling towers distance farther out, friction loss is larger, so No. 1 cooling tower under normal circumstances
Inflow it is on the high side, the flow controllable register of No. 1 cooling tower of appropriate adjustment at this time increases its resistance of intaking, so that a part is followed
Ring water flow is to No. 2 cooling towers, so that the inflow distribution of two towers is more uniform, two cooling towers can play maximum
Cooling capacity reduces recirculated water leaving water temperature.
Open first circulation water return water communicating door 1, second circulation water return water communicating door 2, the first tower basin communicating door 7, second
Tower basin communicating door 8,4 standard-sized sheet of second flow controllable register, first flow controllable register 3 is according to 6 outlet water temperature degree of the second cooling tower
Appropriate controllable register angle makes the leaving water temperature of the first cooling tower 5 and the second cooling tower 6 close.
Embodiment 2: assuming that No. 2 train unit systems operate normally, No. 1 unit outage；
If the cooling panel height F of No. 2 cooling towersG2More than 8 DEG C, then illustrate that the cooling capacity of No. 2 cooling towers is insufficient, it at this time can be with
By No. 1, No. 2 cooling towers are together in parallel, and realize 1 machine double tower；Because recirculated water by No. 2 cooling towers to No. 1 cooling tower distance compared with
Far, friction loss is larger, so the inflow of No. 2 cooling towers is on the high side under normal circumstances, No. 2 cooling towers of appropriate adjustment at this time
Flow controllable register, increase its resistance of intaking, so that a part of circulating water flow is to No. 1 cooling tower, so that two towers
Inflow distribution is more uniform, and two cooling towers can play maximum cooling capacity, reduces recirculated water leaving water temperature.
Open first circulation water return water communicating door 1, second circulation water return water communicating door 2, the first tower basin communicating door 7, second
Tower basin communicating door 8,3 standard-sized sheet of first flow controllable register, second flow controllable register 4 is according to 5 outlet water temperature degree of the first cooling tower
Appropriate controllable register angle makes the leaving water temperature of the first cooling tower 5 and the second cooling tower 6 close.
The cooling stack connection for the other unit that would sit idle under thermal power plant's single power set running state, it is real
The mode of existing two tower of a machine, cooling tower cooling capacity when being equal to the operation of original unit style double, can be effective
The recirculated water outlet water temperature of cooling stack is reduced, cooling panel height is reduced, improves condenser vacuum, improves thermal power plant's operation
Economy.
In addition, the present invention can also optimize distribution to cooling stack cooling water inflow.
Embodiment 3: two units of thermal power plant are run simultaneously, first circulation exit of pump communicating door 27, second circulation water pump
When there is the first condenser 31,32 inflow unevenness of the second condenser when exporting 28 open state of communicating door.
When water circulating pump is using the pump parallel running of two machines three, often it will appear uneven into two unit condenser waters
The phenomenon that, when production is exactly that two unit loads are identical in practice, recirculated water temperature rise Δ t and end difference δ t differ greatly for reaction.
When two set generator power are identical, Δ t1>Δt2, δ t1<δt2, then illustrate No. 1 unit condenser inflow compared with
It is few, increase the angle of No. 2 flow controllable registers at this time, increases tower resistance power on recirculated water and make more recirculated waters cold into No. 1
But above-mentioned recirculated water return water communicating door and flow controllable register (after the installation present apparatus, are accessed the distant place DCS control system, are somebody's turn to do by tower
The artificial distant place of process controls to adjust baffle, and since influence factor is more, manual adjustment can only make Δ t1With Δ t2Infinite approach, δ
t1With δ t2Also infinite approach).
When 5 inflow of the first cooling tower is fewer than 6 inflow of the second cooling tower, increase the angle of second flow controllable register 4
Degree increases tower resistance power on recirculated water and more recirculated waters is made to enter the first cooling tower 5.
When 6 inflow of the second cooling tower is fewer than 5 inflow of the first cooling tower, increase the angle of 3 first flow controllable registers
Degree increases tower resistance power on recirculated water and more recirculated waters is made to enter the second cooling tower 6.
By adjusting flow controllable register, the flow of recirculated water to cooling tower can control, by evenly distributing Shang Tashui
Amount plays the cooling capacity of cooling tower to greatest extent, as far as possible reduction cooling tower leaving water temperature, improves condenser vacuum.
If cooling tower cooling water inflow optimization distribution fortune may be implemented completely according to the cooling towers group of cooling tower
Row, i.e. the good cooling tower inflow of cooling characteristics is more, and the cooling tower inflow of cooling characteristics difference is few.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of cooling stack Expanding Unit Element System operating system, which is characterized in that including two groups or more than two
Circulation, and the attachment device being arranged between circulation, the attachment device include being arranged in two recirculated waters
Cooling water return between system gets in touch with pipeline, recirculated water return water communicating door；The cooling water return water of every group of circulation
Flow controllable register is set on pipeline；The height of the flow controllable register is H, width L, and the circulating water pipeline diameter is
D；In order to guarantee that the flow controllable register of rectangle can be in 0-90 degree flexible modulation, flow controllable register inside circular pipeline
Size be H2+L2< D2；The angle of the flow controllable register and pipe centerline is θ, and θ can be adjusted from 0-90 degree, is opened
State is 0 degree, and closing maximum angle is 90 degree, when flow controllable register is closed to 90 degree, the maximum on-way resistance of generation
Loss, corresponding flow is minimum discharge；When flow controllable register is closed to 0 degree, the smallest friction loss is generated,
Corresponding flow is maximum stream flow；
Further include the distant place DCS control system, the recirculated water return water communicating door and flow controllable register respectively with the distant place DCS
Control system is connected.
2. cooling stack Expanding Unit Element System operating system according to claim 1, which is characterized in that mainly by
One unit circulation and the second unit circulation composition, any group of circulation include:
Recirculated water return water communicating door, flow controllable register, cooling tower, tower basin, the tower basin being sequentially connected export strainer, strainer, open
Machine is closed, pump, hydraulic butterfly valve is followed, follows pump discharge communicating door, condenser and condenser exit butterfly valve, is returned between two groups by recirculated water
It water communicating door, flow controllable register and follows pump discharge communicating door and is connected.
3. cooling stack Expanding Unit Element System operating system according to claim 2, it is characterised in that: described first
Unit circulation include the first circulation water return water communicating door being sequentially connected, first flow controllable register, the first cooling tower,
First tower basin, the first tower basin export strainer；
First tower basin outlet strainer follows pump, the first hydraulic butterfly valve and second with the first strainer, the first headstock gear, first respectively
Strainer, the second headstock gear, second follow pump, the second hydraulic butterfly valve is connected, then common connection first follows pump discharge communicating door, the
One condenser and the first condenser exit butterfly valve；
Form the first unit circulation.
4. cooling stack Expanding Unit Element System operating system according to claim 2, which is characterized in that described second
Unit circulation include the second circulation water return water communicating door being sequentially connected, second flow controllable register, the second cooling tower,
Second tower basin, the second tower basin export strainer；
Second tower basin outlet strainer follows pump, third hydraulic butterfly valve and the 4th with third strainer, third headstock gear, third respectively
Strainer, the 4th headstock gear, the 4th follow pump, the 4th hydraulic butterfly valve is connected, then common connection second follows pump discharge communicating door, the
Two condensers and the second condenser exit butterfly valve；
Form the second unit circulation.
5. cooling stack Expanding Unit Element System operating system according to any one of claim 1 to 4, feature exist
In adjusting flow by adjusting the angle of the flow controllable register.
6. a kind of cooling stack Expanding Unit Element System operation method, which is characterized in that circulation is arranged between two cooling towers
Cooling water return water gets in touch with pipeline and recirculated water return water communicating door；Two cooling towers are provided with flow on cooling water return pipe road respectively
Controllable register.
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| CN201610300089.2A CN105783579B (en) | 2016-05-06 | 2016-05-06 | Cooling stack Expanding Unit Element System operating system and operation method |
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| CN201610300089.2A CN105783579B (en) | 2016-05-06 | 2016-05-06 | Cooling stack Expanding Unit Element System operating system and operation method |
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| CN105783579B true CN105783579B (en) | 2018-12-28 |
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| CN108458623A (en) * | 2017-02-17 | 2018-08-28 | 中国电力工程顾问集团华北电力设计院有限公司 | Power station auxiliary water Expanding Unit Element System dry and wet combines air cooling system |
| CN108519001A (en) * | 2018-03-19 | 2018-09-11 | 华能国际电力股份有限公司福州电厂 | A kind of power plant's open circulating water contact common header system and its control method |
| CN108716232A (en) * | 2018-06-29 | 2018-10-30 | 神华国华广投（柳州）发电有限责任公司 | A kind of circulating water supply system |
| CN109931801B (en) * | 2019-03-26 | 2024-03-26 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Automatic water supplementing system and water supplementing method for circulating cooling water tower pool of thermal power plant |
| CN110160373B (en) * | 2019-05-22 | 2020-10-02 | 内蒙古京能盛乐热电有限公司 | Method for solving load limitation caused by high back pressure generated by ambient temperature in summer of indirect cooling tower |
| CN114150728A (en) * | 2021-11-30 | 2022-03-08 | 中国能源建设集团广东省电力设计研究院有限公司 | Circulating water supply system |
| CN114562840A (en) * | 2022-02-24 | 2022-05-31 | 广州中电荔新热电有限公司 | Cooling system |
| CN116594291B (en) * | 2023-07-17 | 2023-10-20 | 中国船舶集团有限公司第七一九研究所 | Sea-going system self-adaptive control method, device, equipment and readable storage medium |
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| HU228665B1 (en) * | 2009-12-03 | 2013-05-28 | Gea Egi Energiagazdalkodasi Zrt | Hybrid cooling system |
| JP2011226680A (en) * | 2010-04-16 | 2011-11-10 | Hitachi Plant Technologies Ltd | Cooling water producing facility |
| CN201748849U (en) * | 2010-06-02 | 2011-02-16 | 无锡永信能源科技有限公司 | Parallel running cooling tower group |
| CN202694129U (en) * | 2012-07-27 | 2013-01-23 | 大唐华银电力股份有限公司 | One-machine double-tower circulating water system applied to thermal power generating unit |
| CN203100536U (en) * | 2013-03-25 | 2013-07-31 | 中国能源建设集团安徽省电力设计院 | Shunt-wound operation system of cooling towers with different areas |
| CN205580287U (en) * | 2016-05-06 | 2016-09-14 | 南京电力设备质量性能检验中心 | Natural draft cooling tower enlarges unit system operational system |
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Address after: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Applicant after: Guodian Nanjing electric power test & Research Co., Ltd. Address before: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Applicant before: Nanjing Power Equipment Quality & Performance Test Center |
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Address after: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Patentee after: Guoneng Nanjing Electric Power Test Research Co.,Ltd. Address before: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Patentee before: GUODIAN NANJING ELECTRIC POWER TEST RESEARCH Co.,Ltd. |