CN109681859B - Water supplementing system and water supplementing method for pressure-stabilizing blowpipe of once-through boiler - Google Patents
Water supplementing system and water supplementing method for pressure-stabilizing blowpipe of once-through boiler Download PDFInfo
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- CN109681859B CN109681859B CN201910123939.XA CN201910123939A CN109681859B CN 109681859 B CN109681859 B CN 109681859B CN 201910123939 A CN201910123939 A CN 201910123939A CN 109681859 B CN109681859 B CN 109681859B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 415
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000011033 desalting Methods 0.000 claims description 31
- 238000003860 storage Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 23
- 238000011084 recovery Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 230000003584 silencer Effects 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims 5
- 230000003020 moisturizing effect Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention relates to a stable-pressure blowpipe water supplementing system of a direct-current boiler and a water supplementing method, and the stable-pressure blowpipe water supplementing system of the direct-current boiler and the water supplementing method thereof.
Description
Technical Field
The invention relates to a constant-pressure blowpipe water supplementing system and a water supplementing method of a once-through boiler.
Background
Various new, expanded and rebuilt thermal power generation construction projects above 300MW level all need to carry out steam blowpipe debugging work to remove various impurities such as gravel, welding slag, high-temperature oxide skin, corrosion products and the like remained in equipment systems during manufacturing, transportation, storage, installation and the like, prevent serious accidents such as pipe explosion blockage, turbine blade impact damage, blade fracture and the like caused by heating surfaces in unit operation, and create conditions for the early qualification of the whole set of starting steam-water quality of the unit.
The lance tube methods commonly adopted at home at present are a pressure stabilizing method and a pressure reducing method. When the pressure stabilizing method is selected, the boiler evaporation capacity is preferably selected to be 45% or more of the BMCR working condition of the boiler according to the requirements of the steam blowing pipe guide of the thermal power generation construction engineering unit (DL/T1269-2013). However, the water supplementing pipeline from the demineralized water pump to the condenser is generally designed according to 20% BMCR (maximum continuous evaporation capacity of the boiler), and the demineralized water supplementing is far smaller than the water supplementing amount required by the pressure stabilizing blowpipe of the boiler, so that the pressure stabilizing blowpipe is added with a temporary water supplementing system. If a new unit is built and no auxiliary steam is provided, the water supplementing also comprises water supplementing of a small boiler, the water supplementing of the boiler is started according to the design of 5% BMCR, and a certain allowance is considered for water supplementing of a blowing pipe, so that the temporary water supplementing system is designed according to the working condition of 30% BMCR. The existing water supplementing method is to add a temporary pipeline and a temporary water supplementing pump to the condenser from the demineralized water tank, the temporary support and the temporary power supply are also considered by the water supplementing pump, the installation workload is large, and the cost is high. Therefore, improvements and innovations are necessary.
Disclosure of Invention
Aiming at the situation, the invention aims to overcome the defects of the prior art and provide a stable pressure blowing pipe water supplementing system and a water supplementing method of a once-through boiler, which can effectively solve the problem of water supplementing of the stable pressure blowing pipe of the boiler.
The technical scheme of the invention is as follows:
the utility model provides a once-through boiler steady voltage blowpipe moisturizing system, including boiler water-cooling wall, the catch water separator, the water storage tank, water storage tank water level control valve, the header tank, boiler drain pump, header tank water level control valve and condenser, the vapour-water mixture export of boiler water-cooling wall links to each other with the import of catch water separator, the delivery port of catch water separator links to each other with the water inlet of water storage tank, the delivery port of water storage tank links to each other with the water inlet of header tank through water storage tank water level control valve, the delivery port of header tank links to each other with the water inlet of condenser through the recovery pipeline, the valve of establishing ties is equipped with in proper order on the recovery pipeline, boiler drain pump and header tank water level control valve, this moisturizing system still includes the demineralized water tank, demineralized water pump and demineralized water moisturizing valve, the delivery port of demineralized water pump links to each other with the water inlet of condenser through demineralized water moisturizing valve, the delivery port of demineralized water tank links to each other through the recovery pipeline between moisturizing pump and the valve simultaneously, make up the moisturizing structure of condenser, be equipped with on the moisturizing pipeline and be used for controlling the flow.
The water storage tank water level control valve, the water collection tank water level control valve and the demineralized water supplementing valve are all electromagnetic valves, a first water level sensor for detecting the water level of the water collection tank is arranged in the water collection tank, a second water level sensor for detecting the water level of the water collection tank is arranged in the condenser, and the first water level sensor, the second water level sensor, the water storage tank water level control valve, the water collection tank water level control valve and the demineralized water supplementing valve are all connected with the controller.
A water replenishing method based on the water replenishing system comprises the following steps:
a first liquid level sensor: the water level signal acquisition device is used for acquiring a water level signal of the water collecting tank;
a second liquid level sensor: the device is used for collecting a water level signal of the condenser;
and (3) a controller: the system comprises a first liquid level sensor, a second liquid level sensor, a first electromagnetic valve, a second electromagnetic valve, a first control unit, a second control unit and a control unit, wherein the first control unit is used for receiving water level signals acquired by the first liquid level sensor and the second liquid level sensor, and simultaneously acquiring opening signals of all electromagnetic valves and controlling the opening of all electromagnetic valves;
the specific water supplementing method comprises the following steps:
starting a boiler, supplying water in a desalting water tank to a condenser through a desalting water pump, supplying water in the condenser to a deaerator through a condensate pump, enabling the water in the deaerator to enter a boiler water-cooled wall through a water supply pump, receiving a water level signal of the condenser acquired by a second liquid level sensor in the process, and adjusting the opening of a desalting water supplementing valve through the water level signal by the controller, so that the water supplementing speed of the desalting water tank to the condenser is adjusted, and the water level of the condenser is always kept within a required water level range; the method comprises the steps that water is heated in a water cooling wall of a boiler to form a steam-water mixture, the steam-water mixture enters a steam-water separator, separated steam is discharged through a superheater, a temporary blowpipe control valve, a reheater and a silencer, the separated water enters a water collecting tank through a water storage tank and a water level control valve of the water storage tank, the water collecting tank water level control valve is recycled to the condenser through a valve and a boiler drain pump, in the process, a controller receives a water level signal of the water collecting tank collected by a first liquid level sensor, and the controller adjusts the opening of the water level control valve of the water collecting tank through the water level signal, so that the recycling water speed of the water collecting tank to the condenser is adjusted, and the water level of the water collecting tank is always kept within a required water level range;
when the steam discharged through the silencer is larger than the water supplementing amount of the desalting water pump pipeline along with the increase of the steam amount, namely the desalting water supplementing valve is fully opened, but the water level of the condenser is still falling, the system is supplemented with water through the water supplementing pipeline, the water supplementing valve on the water supplementing pipeline is opened, at the moment, water in the desalting water tank enters the recovery pipeline through the water supplementing pipeline, the water level of the water collecting tank rises, the controller receives a water level signal of the water collecting tank collected by the first liquid level sensor, the controller adjusts the opening of the water level regulating valve of the water collecting tank to increase the water supplementing amount of the condenser, the water level of the condenser rises, the opening of the desalting water supplementing valve is reduced, and accordingly the water level of the condenser is controlled to be always kept within a required water level range, the water supplementing is completed, along with the increase of the boiler combustion amount, the evaporation amount is increased, and the opening of the water supplementing valve is gradually increased until the water supplementing amount required by the stable pressure blowing pipe of the boiler is reached.
The invention has novel and unique structure, is simple and reasonable, is easy to produce and operate, has low cost, realizes water supplementing through the original boiler drain pump of the system, does not need to be additionally provided with a temporary water supplementing pump, simplifies the temporary system and the installation workload, saves the installation cost and the operation maintenance cost, realizes more than 5 ten thousand yuan of economic benefit, greatly improves the operation efficiency, is convenient to use, has good effect, is innovation on the pressure-stabilizing blowpipe water supplementing system of the direct-current boiler, and has good social and economic benefits.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
The invention is given by figure 1, which comprises a boiler water-cooling wall 14, a steam-water separator 23, a water storage tank 15, a water storage tank water level control valve 22, a water collection tank 8, a boiler drain pump 6, a water collection tank water level regulating valve 5 and a condenser 4, wherein the steam-water mixture outlet of the boiler water-cooling wall 14 is connected with the inlet of the steam-water separator 23, the water outlet of the steam-water separator 23 is connected with the water inlet of the water storage tank 15, the water outlet of the water storage tank 15 is connected with the water inlet of the water collection tank 8 through the water storage tank water level control valve 22, the water outlet of the water collection tank 8 is connected with the water inlet of the condenser 4 through a recovery pipeline 13, the recovery pipeline 13 is sequentially provided with a valve 7, a boiler drain pump 6 and a water collection tank water level regulating valve 5 which are connected in series, the water supplementing system further comprises a desalting water tank 1, a desalting water supplementing valve 11 and a desalting water supplementing valve 10, the water outlet of the desalting water tank 1 is connected with the water inlet of the desalting water pump 11 through the desalting water supplementing valve 10 and the water inlet of the condenser 4, and the water outlet of the desalting water supplementing water tank 1 is connected with the water supplementing water through a water supplementing pipeline 3 and a water supplementing pipeline 3 between the boiler drain pump 6 and the valve 7, and the water supplementing water is used for controlling the flow of the water.
In order to ensure the use effect, the water tank water level control valve 22, the water tank water level regulating valve 5 and the demineralized water supplementing valve 10 are all electromagnetic valves, the water tank 8 is internally provided with a first water level sensor 9 for detecting the water level of the water tank, the condenser 4 is internally provided with a second water level sensor 12 for detecting the water level of the water tank, the first water level sensor 9, the second water level sensor 12, the water tank water level control valve 22, the water tank water level regulating valve 5 and the demineralized water supplementing valve 10 are all connected with a controller, the controller can be an original control system of a power plant, and can also independently adopt commercial products such as a PLC (programmable logic controller) or a singlechip controller, and the like, the controller can be used for receiving the water level signals collected by the two water level sensors, collecting opening signals of all the electromagnetic valves and controlling the opening of all the electromagnetic valves, and the control technology is the routine technology of a person skilled in the art.
The water outlet of the condenser 4 is connected with the water inlet of the boiler water-cooled wall 14 through a condensate pump 19, a deaerator 20 and a water supply pump 21 which are connected in series to form a water circulation structure.
The steam outlet of the steam-water separator 23 is connected with the inlet of the superheater 16, the outlet of the superheater 16 is connected with the inlet of the reheater 17 through a temporary blowpipe control valve 24, the outlet of the reheater 17 is provided with a silencer 18, and the steam separated by the steam-water separator is discharged through the superheater, the temporary blowpipe control valve, the reheater and the silencer.
As shown in fig. 1, the recovery line 13 has 2 lines.
A water replenishing method based on the water replenishing system comprises the following steps:
first level sensor 9: for collecting the water level signal of the water collection tank 8;
second level sensor 12: the device is used for collecting a water level signal of the condenser 4;
and (3) a controller: the system comprises a first liquid level sensor, a second liquid level sensor, a first electromagnetic valve, a second electromagnetic valve, a first control unit, a second control unit and a control unit, wherein the first control unit is used for receiving water level signals acquired by the first liquid level sensor and the second liquid level sensor, and simultaneously acquiring opening signals of all electromagnetic valves and controlling the opening of all electromagnetic valves;
the specific water supplementing method comprises the following steps:
starting the boiler, supplementing water in the desalting water tank 1 to the condenser 4 through the desalting water pump 11, feeding water in the condenser to the deaerator 20 through the condensate pump 19, enabling the water in the deaerator 20 to enter the boiler water-cooled wall 14 through the water feeding pump 21, receiving a water level signal of the condenser acquired by the second liquid level sensor 12 in the process, and adjusting the opening of the desalting water supplementing valve 10 through the water level signal by the controller, so that the water supplementing speed of the desalting water tank to the condenser is adjusted, and the water level of the condenser 4 is always kept within a required water level range; the water is heated in the water cooling wall 14 of the boiler to form a steam-water mixture, the steam-water mixture enters a steam-water separator 23, the separated steam is discharged through a superheater 16, a temporary blowpipe control valve 24, a reheater 17 and a silencer 18, the separated water enters a water collecting tank 8 through a water storage tank 15 and a water storage tank water level control valve 22, the water collecting tank water level control valve 5 is recycled to a condenser through a valve 7 and a boiler drain pump 6, in the process, a controller receives a water level signal of the water collecting tank collected by a first liquid level sensor 9, and the controller adjusts the opening degree of the water collecting tank water level control valve 5 through the water level signal, so that the water collecting tank is used for adjusting the recycling water speed of the condenser, and the water level of the water collecting tank is always kept within a required water level range;
when the steam quantity is increased, the water supplementing valve 10 is fully opened when the steam discharged from the silencer is larger than the water supplementing quantity of the desalting water pump pipeline, but the water level of the condenser is still lowered, the system is supplemented by the water supplementing pipeline, the water supplementing valve 2 on the water supplementing pipeline 3 is opened, at the moment, the water in the desalting water tank enters the recovery pipeline 13 through the water supplementing pipeline, the water level of the water collecting tank 8 rises, the controller receives the water level signal of the water collecting tank collected by the first liquid level sensor 9, the opening of the water collecting tank water level regulating valve 5 is regulated by the controller to supplement water for the condenser, the water level of the condenser rises, the opening of the desalting water supplementing valve 10 is reduced, so that the water level of the condenser 4 is controlled to be always in a required water level range, the water supplementing is completed along with the increase of the boiler combustion quantity, the evaporation quantity is increased, and the opening of the water supplementing valve is gradually increased until the water supplementing quantity required by the boiler steady-pressure blowing pipe is reached.
Compared with the prior art, the invention has novel and unique structure, simplicity, rationality, easy production, easy operation and low cost, realizes water supplementing through the original boiler drain pump of the system, does not need to additionally install a temporary water supplementing pump, simplifies the temporary system and the installation workload, does not need to purchase the temporary pump, saves installation cost and operation maintenance cost, realizes more than 5 ten thousand yuan of economic benefit, greatly improves the operation efficiency, realizes automatic water supplementing, is convenient to use, has good effect, is innovation on the stable-pressure blowpipe water supplementing system of the direct-current boiler, and has good social and economic benefits.
The applicant points out that the above mentioned embodiment is only one example and is not intended to limit the scope of the present application, and all technical solutions made by equivalent or equivalent means, which are substantially the same as the technical solutions of the present application, belong to the scope of the present application.
Claims (3)
1. A method for supplementing water by a steady-pressure blowpipe of a once-through boiler is characterized by comprising a steady-pressure blowpipe water supplementing system of the once-through boiler, which comprises a boiler water cooling wall (14), a steam-water separator (23), a water storage tank (15), a water storage tank water level control valve (22), a water collection tank (8), a boiler drain pump (6), a water collection tank water level regulating valve (5) and a condenser (4), wherein a steam-water mixture outlet of the boiler water cooling wall (14) is connected with an inlet of the steam-water separator (23), a water outlet of the steam-water separator (23) is connected with a water inlet of the water storage tank (15), a water outlet of the water storage tank (15) is connected with a water inlet of the water collection tank (8) through the water storage tank water level control valve (22), a water outlet of the water collection tank (8) is connected with a water inlet of the condenser (4) through a recovery pipeline (13), a serial valve (7), a boiler drain pump (6) and a water collection tank water level regulating valve (5) are sequentially arranged on the recovery pipeline (13), the water supplementing system is further comprises a salt removal water tank (1), a salt removal pump (11) and a salt removal water valve (10), a water outlet of the salt removal pump (1) is connected with a water inlet of the salt water removal pump (11) through a water removal valve (10), meanwhile, the water outlet of the desalting water tank (1) is connected with a recovery pipeline between a boiler drain pump (6) and a valve (7) through a water supplementing pipeline (3) to form a water supplementing structure of the condenser, and the water supplementing pipeline (3) is provided with a water supplementing valve (2) for controlling the flow;
the water storage tank water level control valve (22), the water collection tank water level regulating valve (5) and the demineralized water supplementing valve (10) are all electromagnetic valves, a first water level sensor (9) for detecting the water level of the water collection tank is arranged in the water collection tank (8), a second water level sensor (12) for detecting the water level of the condenser (4) is arranged in the condenser, and the first water level sensor (9), the second water level sensor (12), the water storage tank water level control valve (22), the water collection tank water level regulating valve (5) and the demineralized water supplementing valve (10) are all connected with the controller;
wherein:
first level sensor (9): the water level signal acquisition device is used for acquiring a water level signal of the water collecting tank (8);
second level sensor (12): the device is used for collecting a water level signal of the condenser (4);
and (3) a controller: the system comprises a first liquid level sensor, a second liquid level sensor, a first electromagnetic valve, a second electromagnetic valve, a first control unit, a second control unit and a control unit, wherein the first control unit is used for receiving water level signals acquired by the first liquid level sensor and the second liquid level sensor, and simultaneously acquiring opening signals of all electromagnetic valves and controlling the opening of all electromagnetic valves;
the specific water supplementing method comprises the following steps:
starting a boiler, replenishing water in a desalting water tank (1) into a condenser (4) through a desalting water pump (11), feeding water in the condenser into a deaerator (20) through a condensate pump (19), enabling water in the deaerator (20) to enter a boiler water-cooling wall (14) through a water feeding pump (21), receiving a water level signal of the condenser acquired by a second liquid level sensor (12) in the process, and adjusting the opening of a desalting water replenishing valve (10) through the water level signal by the controller so as to adjust the water replenishing speed of the desalting water tank to the condenser, so that the water level of the condenser (4) is always kept within a required water level range; the water is heated in a boiler water cooling wall (14) to form a steam-water mixture, the steam-water mixture enters a steam-water separator (23), separated steam is discharged through a superheater (16), a temporary blowpipe control valve (24), a reheater (17) and a silencer (18), the separated water enters a water collecting tank (8) through a water storage tank (15) and a water storage tank water level control valve (22), the water collecting tank water level control valve (5) is recycled to a condenser through a valve (7) and a boiler drain pump (6), in the process, a controller receives a water level signal of the water collecting tank collected by a first liquid level sensor (9), and the controller adjusts the opening of the water collecting tank water level control valve (5) through the water level signal, so that the recovery water speed of the water collecting tank to the condenser is adjusted, and the water level of the water collecting tank is always kept within a required water level range;
when the steam discharged through the silencer is larger than the water supplementing amount of the desalting water pump pipeline along with the increase of the steam amount, namely, the desalting water supplementing valve (10) is fully opened, but the water level of the condenser is still falling, the system is required to be supplemented with water through the water supplementing pipeline, the water supplementing valve (2) on the water supplementing pipeline (3) is opened, at the moment, water in the desalting water tank enters the recovery pipeline (13) through the water supplementing pipeline, the water level of the water collecting tank (8) rises, the controller receives the water level signal of the water collecting tank collected by the first liquid level sensor (9), the controller adjusts the opening of the water level regulating valve (5) of the water collecting tank to supplement water for the condenser, the water level of the condenser rises, the opening of the desalting water supplementing valve (10) is reduced, so that the water level of the condenser (4) is controlled to always keep within a required water level range, water supplementing is completed, along with the increase of the combustion amount of the boiler, the evaporation amount is increased, and the opening of the water supplementing valve is gradually increased until the water supplementing amount reaches the water supplementing amount required by the stable pressure blowing pipe of the boiler.
2. The method for supplementing water by using the pressure-stabilizing blowpipe of the once-through boiler according to claim 1, wherein the water outlet of the condenser (4) is connected with the water inlet of the water-cooled wall (14) of the boiler through a condensate pump (19), a deaerator (20) and a water supply pump (21) which are connected in series to form a water circulation structure.
3. The method for supplementing water by using the pressure stabilizing blowpipe of the once-through boiler according to claim 1, wherein a steam outlet of the steam-water separator (23) is connected with an inlet of the superheater (16), an outlet of the superheater (16) is connected with an inlet of the reheater (17) through a temporary blowpipe control valve (24), and an outlet of the reheater (17) is provided with a silencer (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910123939.XA CN109681859B (en) | 2019-02-19 | 2019-02-19 | Water supplementing system and water supplementing method for pressure-stabilizing blowpipe of once-through boiler |
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| CN201910123939.XA CN109681859B (en) | 2019-02-19 | 2019-02-19 | Water supplementing system and water supplementing method for pressure-stabilizing blowpipe of once-through boiler |
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| CN207539891U (en) * | 2017-12-06 | 2018-06-26 | 中国大唐集团科学技术研究院有限公司华东分公司 | Supercritical unit voltage stabilizing steam-line blowing water charging system |
| CN209605141U (en) * | 2019-02-19 | 2019-11-08 | 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 | A kind of direct current cooker image-stabilization FCS water charging system |
-
2019
- 2019-02-19 CN CN201910123939.XA patent/CN109681859B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11304107A (en) * | 1998-04-17 | 1999-11-05 | Toshiba Corp | Condenser level controller |
| JP2004263993A (en) * | 2003-03-04 | 2004-09-24 | Babcock Hitachi Kk | Once-through boiler and operation method during boiler stop |
| CN204420978U (en) * | 2015-01-14 | 2015-06-24 | 华电莱州发电有限公司 | A kind of energy saving drainage system of boiler hydrophobic development unit |
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| CN209605141U (en) * | 2019-02-19 | 2019-11-08 | 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 | A kind of direct current cooker image-stabilization FCS water charging system |
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| CN109681859A (en) | 2019-04-26 |
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