CN109404875A - A kind of cold conditions purging method of the ultra supercritical double reheat boiler without circulating pump - Google Patents
A kind of cold conditions purging method of the ultra supercritical double reheat boiler without circulating pump Download PDFInfo
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- CN109404875A CN109404875A CN201811010093.0A CN201811010093A CN109404875A CN 109404875 A CN109404875 A CN 109404875A CN 201811010093 A CN201811010093 A CN 201811010093A CN 109404875 A CN109404875 A CN 109404875A
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- water
- cold conditions
- storage tank
- water storage
- flushing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/08—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass at critical or supercritical pressure values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/52—Washing-out devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
A kind of cold conditions purging method the invention discloses ultra supercritical double reheat boiler without circulating pump, as the water storage tank drain water quality μ g/L of Fe > 500, the flushing of cold conditions open type is first carried out, when drain water quality Fe is decreased below 500 μ g/L, the flushing of cold conditions open type terminates, then carries out cold conditions circulation flushing；As the water storage tank drain water quality μ g/L of Fe < 500, cold conditions circulation flushing is directly carried out；Cold conditions circulation flushing has two-way, it is that water through condenser sequentially enters oxygen-eliminating device, feed pump, economizer, separator, water storage tank, water storage tank to flash vessel altitude valve, flash vessel all the way, condenser, which is drained into, through drainage pump again enters circulation, another way is that water through condenser sequentially enters oxygen-eliminating device, feed pump, economizer, separator, water storage tank, then drains into oxygen-eliminating device through water storage tank to deaerator level control valve and enter circulation.Present invention eliminates boiler water circulating pumps, can save 5,000,000 yuan of equipment investment, simplify activation system, and it is convenient that cold conditions is rinsed, and reduces the operating quantity of operations staff；Reduce repair and maintenance cost.
Description
Technical field
The present invention relates to ultra supercritical double reheat boiler technology field more particularly to a kind of ultra supercritical double reheat pots
Cold conditions purging method of the furnace without circulating pump.
Background technique
The activation system for the ultra supercritical double reheat boiler gone into operation at present is provided with boiler startup circulating pump.For band
The activation system of boiler water circulating pump, since the working medium of boiler water circulating pump has higher temperature and pressure, to boiler water circulating pump quality
More demanding, the boiler water circulating pump of domestic ultra-supercritical boiler is import at present.And import boiler water circulating pump it is at high cost and
Order cycle time is long, and the supply of material of boiler water circulating pump tends not to the needs for meeting power plant construction.Also, boiler water circulating pump motor chamber
Cooling water quality require it is very high, many power plant all occurred due to motor chamber Inner filter net block or occur motor chamber it is cold
But the case where water leaks, and boiler water circulating pump motor temperature height or electrical-coil is caused to burn, shutdown maintenance.
It needs to clean it before the starting ignition of ultra supercritical double reheat boiler system, light a fire after cleaning,
When the cold conditions of ultra supercritical double reheat boiler is rinsed, can all carry out partial circulating using boiler water circulating pump, water supply by economizer,
Water-cooling wall is through steam-water separator, it is therefore necessary to optimize to the purging method with boiler water circulating pump.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a kind of ultra supercritical double reheat pots
Cold conditions purging method of the furnace without circulating pump can be not provided with boiler water circulating pump and then solve existing purging method cost height, process
Complicated problem.
An object of the present invention adopts the following technical scheme that realization:
A kind of cold conditions purging method of the ultra supercritical double reheat boiler without circulating pump, when water storage tank drain water quality Fe > 500
When μ g/L, the flushing of cold conditions open type is first carried out, when drain water quality Fe is decreased below 500 μ g/L by the cold conditions open type flushing, institute
Stating the flushing of cold conditions open type terminates, and carries out cold conditions circulation flushing；As the water storage tank drain water quality μ g/L of Fe < 500, cold conditions is directly carried out
Circulation flushing；
The cold conditions circulation flushing has two-way, be water all the way through condenser sequentially enter oxygen-eliminating device, feed pump, economizer,
Separator, water storage tank, water storage tank to flash vessel altitude valve, flash vessel, then drain into condenser through drainage pump and enter circulation, separately
It is all the way that water through condenser sequentially enters oxygen-eliminating device, feed pump, economizer, separator, water storage tank, then through water storage tank to oxygen-eliminating device
Altitude valve drains into oxygen-eliminating device and enters circulation；During the cold conditions circulation flushing, feed pump provides power for oxygen-eliminating device
In water enter economizer entrance；When water storage tank water quality and economizer entrance water quality reach qualification simultaneously, flushing terminates.
Further, the standard of the water storage tank water quality qualification is the μ of Fe < 100 g/L, and the economizer entrance water quality is qualified
Standard be the μ of Fe < 50 g/L.
Further, the process that the cold conditions open type is rinsed is that water through condenser sequentially enters oxygen-eliminating device, feed pump, saves coal
Device, separator, water storage tank, the altitude valve of water storage tank to flash vessel, flash vessel, start drainage pump, and water is emitted into recirculated water
Water return pipeline；Feed pump provides power and the water in oxygen-eliminating device is pumped into economizer entrance in the cold conditions open type flushing.
Further, it before cold conditions open type flushing, needs that water will be full of in boiler, closes economizer exit, storage
The altitude valve of water tank to flash vessel is opened, and a pot furnace air emptying is made.
Further, the ultra supercritical double reheat boiler is without feedwater flow range in the cold conditions purging method of circulating pump
It is 25% to 30%.
Further, temperature control is 120 DEG C in the oxygen-eliminating device.
Compared with prior art, the beneficial effects of the present invention are: ultra supercritical double reheat boiler provided by the invention without
The cold conditions purging method of circulating pump eliminates boiler water circulating pump and carries out partial circulating, can save 5,000,000 yuan of equipment investment, simplifies
Activation system, it is convenient that cold conditions is rinsed, and reduces the operating quantity of operations staff；Reduce repair and maintenance cost；It is provided by the invention
Cold conditions purging method of the ultra supercritical double reheat boiler without circulating pump controls the Fe of economizer entrance in 50 μ g/L, water storage
The Fe of case is controlled in 100 μ g/L, and can effectively reduce water quality in double reheat boiler and corrode on it etc. influences；And work as water storage tank water
Matter Fe is saving the energy into cold conditions circulation flushing less than 500 μ g/L, reduces furnace water outlet.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Fig. 1 is the stream of cold conditions purging method one preferred embodiment of the ultra supercritical double reheat boiler of the present invention without circulating pump
Cheng Tu.
In figure: 11, separator；12, water storage tank；13, water storage tank is to deaerator level control valve；14, oxygen-eliminating device；15, it gives
Water pump；16, high-pressure heater；17, water-supplying operation station；18, economizer；19, water-cooling wall；23, water storage tank is to flash vessel water level control
Valve processed；24, flash vessel；25, drain tank；26, drainage pump；27, condenser；28, low-pressure heater；31, recirculated water water return pipeline.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
It should be noted that it can be directly on another component when component is referred to as " being fixed on " another component
Or there may also be components placed in the middle.When a component is considered as " connection " another component, it, which can be, is directly connected to
To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being set to " another component, it
It can be and be set up directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical
", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Fig. 1, a kind of cold conditions purging method of ultra supercritical double reheat boiler without circulating pump, works as water storage tank first
When the 12 μ g/L of water quality Fe > 500, first carries out the flushing of cold conditions open type and need to be full of in boiler before carrying out the flushing of cold conditions open type
Water is closed economizer 18 and is exported, and water storage tank to flash vessel altitude valve 23 is opened, and makes a pot furnace air emptying.It is described super
Critical double reheat boiler is 25% to 30% without feedwater flow range in the cold conditions purging method of circulating pump, according to auxiliary steam
Pressure maintains temperature in oxygen-eliminating device 14 to obtain at 120 DEG C or so through test, cold when temperature control is 120 DEG C in oxygen-eliminating device 14
State flushing effect is best.The process that cold conditions open type is rinsed be water through condenser 27 sequentially enter low-pressure heater 28, oxygen-eliminating device 14,
Feed pump 15, high-pressure heater 16, water-supplying operation station 17, economizer 18, water-cooling wall 19, separator 11, water storage tank 12, water storage tank
Then start drainage pump 26 to flash vessel altitude valve 23, flash vessel 24 into drain tank 25, water is emitted into recirculated water
Water return pipeline 31；The water in oxygen-eliminating device 14 is entered economizer 18 by the offer of feed pump 15 power in the flushing of cold conditions open type.
Then, when 12 drain water quality of water storage tank is down to the μ g/L of Fe < 500 by the flushing of cold conditions open type, recirculated water return pipe is closed
The valve in road 31, water drain into condenser 27 through drainage pump 26 and recycle, and carry out cold conditions circulation flushing；Or when water storage tank 12 is initially dredged
When the water water quality μ g/L of Fe < 500, it is directly entered cold conditions circulation flushing.
Cold conditions circulation flushing includes two-way circulation flushing, be water all the way through condenser 27 sequentially enter low-pressure heater 28,
Oxygen-eliminating device 14, feed pump 15, high-pressure heater 16, water-supplying operation station 17, economizer 18, water-cooling wall 19, separator 11, water storage tank
12, water storage tank drains into condenser 27 into drain tank 25, then through drainage pump 26 to flash vessel altitude valve 23, flash vessel 24
Into circulation；Another way is that water through condenser 27 sequentially enters oxygen-eliminating device 14, feed pump 15, high-pressure heater 16, water-supplying operation
It stands 17, economizer 18, water-cooling wall 19, separator 11, water storage tank 12, then drains into and remove to deaerator level control valve 13 through water storage tank
Oxygen device 14 enters circulation, and during the cold conditions circulation flushing, feed pump 15 provides power and transmits the water in oxygen-eliminating device 14
To 18 entrance of economizer；As the 18 entrance water quality μ g/L of Fe < 50 of 12 μ of water quality Fe < 100 g/L of water storage tank and economizer, while reaching conjunction
When lattice, flushing terminates, and can carry out ignition procedure.
Cold conditions purging method of the ultra supercritical double reheat boiler provided by the invention without circulating pump eliminates furnace water circulation
Pump carries out partial circulating, can save 5,000,000 yuan of equipment investment, simplifies activation system, and it is convenient that cold conditions is rinsed, and reduces operation
The operating quantity of personnel；Reduce repair and maintenance cost；Cold conditions of the ultra supercritical double reheat boiler without circulating pump provided by the invention
The Fe control of 18 entrance of economizer is controlled in 100 μ g/L, can effectively be subtracted in 50 μ g/L, the Fe of water storage tank 12 by purging method
Water quality is corroded it etc. and to be influenced in few double reheat boiler；And work as 12 water quality Fe of water storage tank less than 500 μ g/L, it is followed into cold conditions
Ring rinses, and has saved the energy, has reduced furnace water outlet.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (6)
1. a kind of cold conditions purging method of ultra supercritical double reheat boiler without circulating pump, it is characterised in that: when water storage tank is hydrophobic
When the μ g/L of water quality Fe > 500, the flushing of cold conditions open type is first carried out, the cold conditions open type, which is rinsed, decreases below 500 for drain water quality Fe
When μ g/L, the cold conditions open type flushing terminates, and carries out cold conditions circulation flushing；As the water storage tank drain water quality μ g/L of Fe < 500, directly
Tap into row cold conditions circulation flushing；
The cold conditions circulation flushing has two-way, is that water through condenser sequentially enters oxygen-eliminating device, feed pump, economizer, separation all the way
Device, water storage tank, water storage tank to flash vessel altitude valve, flash vessel, then drain into condenser through drainage pump and enter circulation, another way
It is that water through condenser sequentially enters oxygen-eliminating device, feed pump, economizer, separator, water storage tank, then through water storage tank to deaerator level
Control valve drains into oxygen-eliminating device and enters circulation；During the cold conditions circulation flushing, feed pump provides power will be in oxygen-eliminating device
Water enters economizer entrance；When water storage tank water quality and economizer entrance water quality reach qualification simultaneously, flushing terminates.
2. cold conditions purging method of the ultra supercritical double reheat boiler as described in claim 1 without circulating pump, it is characterised in that:
The standard of the water storage tank water quality qualification is the μ of Fe < 100 g/L, and the standard of the economizer entrance water quality qualification is the μ of Fe < 50 g/L.
3. cold conditions purging method of the ultra supercritical double reheat boiler as claimed in claim 1 or 2 without circulating pump, feature exist
It is that water through condenser sequentially enters oxygen-eliminating device, feed pump, economizer, separator, water storage in: the process that the cold conditions open type is rinsed
Case, the altitude valve of water storage tank to flash vessel, flash vessel, start drainage pump, and water is emitted into recirculated water water return pipeline；It is described cold
The water in oxygen-eliminating device is entered economizer entrance by feed pump offer power in the flushing of state open type.
4. cold conditions purging method of the ultra supercritical double reheat boiler as described in claim 1 without circulating pump, it is characterised in that:
Before cold conditions open type flushing, needs that water will be full of in boiler, close economizer exit, the water level of water storage tank to flash vessel
Control valve is opened, and a pot furnace air emptying is made.
5. cold conditions purging method of the ultra supercritical double reheat boiler as described in claim 1 without circulating pump, it is characterised in that:
The ultra supercritical double reheat boiler is 25% to 30% without feedwater flow range in the cold conditions purging method of circulating pump.
6. cold conditions purging method of the ultra supercritical double reheat boiler as described in claim 1 without circulating pump, it is characterised in that:
Temperature control is 120 DEG C in the oxygen-eliminating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010093.0A CN109404875A (en) | 2018-08-31 | 2018-08-31 | A kind of cold conditions purging method of the ultra supercritical double reheat boiler without circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010093.0A CN109404875A (en) | 2018-08-31 | 2018-08-31 | A kind of cold conditions purging method of the ultra supercritical double reheat boiler without circulating pump |
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| CN109404875A true CN109404875A (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811010093.0A Pending CN109404875A (en) | 2018-08-31 | 2018-08-31 | A kind of cold conditions purging method of the ultra supercritical double reheat boiler without circulating pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566934A (en) * | 2019-09-26 | 2019-12-13 | 贵州电网有限责任公司 | boiler water circulating pump cooling system pipeline flushing device and method |
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| CN103953915A (en) * | 2014-05-19 | 2014-07-30 | 章礼道 | Method for recycling startup drained water working medium and heat of secondary reheating boiler through high-pressure heaters |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566934A (en) * | 2019-09-26 | 2019-12-13 | 贵州电网有限责任公司 | boiler water circulating pump cooling system pipeline flushing device and method |
| CN110566934B (en) * | 2019-09-26 | 2024-04-23 | 贵州电网有限责任公司 | Pipeline flushing device and flushing method for boiler water circulating pump cooling system |
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Application publication date: 20190301 |
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