CN207365738U - A kind of steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment - Google Patents
A kind of steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment Download PDFInfo
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- CN207365738U CN207365738U CN201721383549.9U CN201721383549U CN207365738U CN 207365738 U CN207365738 U CN 207365738U CN 201721383549 U CN201721383549 U CN 201721383549U CN 207365738 U CN207365738 U CN 207365738U
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Abstract
It the utility model is related to a kind of steam condenser of steam turbine set vacuum with high-low pressure condenser and maintain equipment, including high pressure condenser and low pressure condenser, the high pressure condenser and low pressure condenser one water-ring vacuum pump of access in parallel, the high pressure condenser includes sequentially connected first condenser, first Roots vaccum pump, First Heat Exchanger, the low pressure condenser includes sequentially connected second condenser, second Roots vaccum pump, second heat exchanger, the First Heat Exchanger and the second heat exchanger access water-ring vacuum pump arrival end in parallel, the outlet of water-ring vacuum pump end connects steam-water separator, water, gas mixture is discharged into steam-water separator, incondensable gas is arranged to air by discharge duct, water is stored in the steam-water separator and is circulated again through water-ring vacuum pump.The utility model not only saves space, and energy-efficient.
Description
Technical field
The present invention relates to condenser vacuum device field, is specifically a kind of Steam Turbine with high-low pressure condenser and coagulates
Vapour device vacuum maintains equipment.
Background technology
The foundation of condenser vacuum：Unit starting initial stage, condenser vacuum is dependent on air ejector equipment by condenser
Air is extracted out, and the speed for establishing vacuum at this time is determined by the capacity of air ejector equipment and the tightness of vacuum system；Unit is normal
During operation, turbine discharge enters in condenser, and steam is cooled the cooling of water and condenses into water, steam condensation Cheng Shuihou,
Its volume greatly reduces and forms high vacuum.Unit starting initial stage, air are full of whole condenser, when starting to save
Between, it is necessary to which powerful air ejector equipment establishes vacuum in the short period of time；During unit normal operation, non-condensing gas in steam
Body is seldom, only needs the air ejector equipment of smaller power that the extraction of incondensable gas can be stablized to the vacuum of condenser.
Existing unit 600MW and above unit（Double condensers）After unit normal operation, maintaining the mode of vacuum has
Two kinds：First, utilize big water-ring vacuum pump when starting；Coagulated second, being transformed into two sets of Roots vaccum pump groups and corresponding to two respectively
Vapour device maintains vacuum.There are problems with for first way：1st, " big horse traction is small for the presence of air ejector equipment during unit normal operation
The phenomenon of car ", waste of energy；2nd, during normal operation, vacuum pump inlet pressure is low, and is vapour（Gassiness）, water two phase flow, pumping system
System vibration, noise are big, particularly vacuum pump serious cavitation erosion；3rd, high temperature season, when vacuum pump coolant temperature raises, vacuum pumping
The positive effect of vacuum reduces, and condenser vacuum declines, and influences the economy of generating set, while more exacerbate the vapour of vacuum pump
Lose phenomenon.The second way can efficiently solve first way there are the problem of, but two sets of Roots vacuum pump group site layout projects
Nearly 20 square metres of the useful space is needed, and pump-line, cooling water pipeline arrangement must walk logical and reasonable；It is and electric at present
Factory's site space is very limited, it is difficult to there is two sets of Roots vacuum pump groups of location arrangements.
The content of the invention
In view of the above-mentioned problems, the present invention provides a kind of energy saving, efficient Steam Turbine condensing with high-low pressure condenser
Device vacuum maintains equipment.Vacuum described in the invention maintains equipment to substitute big vacuum pump completely in unit normal operation, comes
Maintain unit vacuum；At the same time will in the prior art two sets Roots vacuum pump groups be combined as it is a set of, it is more efficient, and save take up an area sky
Between.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of steam turbine with high-low pressure condenser
Group condenser vacuum maintains equipment, including high pressure condenser and low pressure condenser, and the high pressure condenser and low pressure condenser are simultaneously
Couple into a water-ring vacuum pump, the high pressure condenser includes sequentially connected first condenser, the first Roots vaccum pump, the
One heat exchanger, compresses through the first Roots vaccum pump after the incondensable gas and water vapor mixture extraction in first condenser
Into the first mixture, the low pressure condenser includes sequentially connected second condenser, the second Roots vaccum pump, the second heat exchange
Device, is compressed into second after the incondensable gas and water vapor mixture extraction in second condenser through the second Roots vaccum pump
Mixture, the First Heat Exchanger and the second heat exchanger are in parallel to access the water-ring vacuum pump arrival end, and the liquid-ring type is true
Empty pump discharge end connects steam-water separator, and first mixture and the second mixture are further taken out through the water-ring vacuum pump
Go out incondensable gas, vapor further condenses into water, and water, gas mixture are discharged into steam-water separator, and incondensable gas passes through row
Feed channel is arranged to air, and water is stored in the steam-water separator and is circulated again through water-ring vacuum pump.
Preferably, the high pressure condenser further includes the first non-return valve and the first quick-break valve, first non-return valve one
End is connected with the first condenser, other end connection the first quick-break valve side, and the first quick-break valve opposite side is connected to the
One Roots vaccum pump.
Preferably, the low pressure condenser further includes the second non-return valve and the second quick-break valve, second non-return valve one
End is connected with the second condenser, other end connection the second quick-break valve side, and the second quick-break valve opposite side is connected to the
Two Roots vaccum pumps.
Compared with prior art, the invention has the advantages that：
1st, the first Roots vaccum pump and the second Roots vaccum pump use three leaf air-cooled roots vacuum pumps in the invention, adopt
With two condenser units access water-ring vacuum pump in parallel, two condenser units are made to share a water-ring vacuum pump, and
The frame of whole vacuum stabilizing equipment is shared, space can be saved, and reach energy saving effect
2nd, the water-ring vacuum pump that the invention uses substitutes current big water ring pump in the vacuum maintenance stage, to reduce dimension
The Energy in use of vacuum stages is held, avoids low load with strong power phenomenon；Meanwhile the gas of water-ring vacuum pump suction is by sieve
Thatch vacuum pump is compressed, so avoiding the generation of water ring pump cavitation phenomenons from structure design, eliminates potential hidden danger,
The possibility of impeller failure is reduced, reduces maintenance workload and maintenance cost；
3rd, condenser maintains vacuum stages energy consumption to be greatly reduced in the invention, average energy saving more than 70%, while from knot
It completely avoid the generation of vacuum pump cavitation phenomenons in structure design, achieve preferable economic benefit；
4th, working performance is from the work elevated restriction of coolant-temperature gage；
5th, cooling water flow, average water-saving rate more than 25% are saved.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of preferred embodiment of the present invention.
Embodiment
Below in conjunction with Fig. 1, the present invention will be described in detail, and illustrative examples of the invention and explanation are used for explaining herein
The present invention, but it is not as a limitation of the invention.
A kind of steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment, including high pressure condenser and low pressure
Condenser, the high pressure condenser and low pressure condenser one water-ring vacuum pump 7 of access in parallel, the high pressure condenser include according to
The first condenser 1, the first Roots vaccum pump 2, the First Heat Exchanger 3 of secondary connection, the incondensable gas in first condenser
The first mixture is compressed into through the first Roots vaccum pump after being extracted out with water vapor mixture, mixture can be greatly reduced after compression
Volume, and pressure is improved, the low pressure condenser includes sequentially connected second condenser 4, the second Roots vaccum pump 5, second
Heat exchanger 6, compresses through the second Roots vaccum pump after the incondensable gas and water vapor mixture extraction in second condenser
Into the second mixture, the First Heat Exchanger and the second heat exchanger access 7 arrival end of water-ring vacuum pump in parallel, the water
The ring vacuum pumps port of export connects steam-water separator 8, and first mixture and the second mixture are through the water-ring vacuum pump
Further extract incondensable gas out, vapor further condenses into water, and water, gas mixture are discharged into steam-water separator 8, non-condensing gas
Body is arranged to air by discharge duct, and water is stored in the steam-water separator and is circulated again through water-ring vacuum pump.It is described
High pressure condenser further includes the first non-return valve 10 and the first quick-break valve 11, and described first non-return valve one end connects with the first condenser
Connect, the other end connects the first quick-break valve side, and the first quick-break valve opposite side is connected to the first Roots vaccum pump.It is described
Low pressure condenser further includes the second non-return valve 12 and the second quick-break valve 13, and described second non-return valve one end connects with the second condenser
Connect, the other end connects the second quick-break valve side, and the second quick-break valve opposite side is connected to the second Roots vaccum pump.It is described
First non-return valve, the second non-return valve and the first quick-break valve, the second quick-break valve are used for quick when vacuum stabilizing equipment failure is stopped transport
Cut-off loop, avoids air reflux from entering condenser；Heat of the heat exchanger for the water-ring vacuum pump working solution that swaps out, it is ensured that
Vacuum pump accidental conditions；The steam-water separator is used for steam-water separation, and condensate-water polishing is used for water-ring vacuum pump again
Secondary circulation, air removal unit.In the invention, the 3rd heat exchanger 9 is also provided with, the 3rd heat exchanger is used for liquid-ring type
Vacuum pump radiates, and the First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger are in be arranged in parallel.
In implementation process, water ring vacuum pump is put into operation, as quickly vacuum is established, when condenser vacuum reaches
When 90%, the operation of condenser unit commitment, as vacuum is maintained, original water ring vacuum pump is shut down and is done spare.
The first Roots vaccum pump and the second Roots vaccum pump use three leaf air-cooled roots vacuum pumps in the invention, use
Two condenser units access water-ring vacuum pump in parallel, makes two condenser units share a water-ring vacuum pump, and altogether
With the frame of whole vacuum stabilizing equipment, space can be saved, and reaches energy saving effect.Described in each condenser unit
Three leaf air-cooled roots vacuum pumps are in series with water ring vacuum pump, and three leaf air-cooled roots vacuum pumps are that one kind can bear high pressure
Difference, the vacuum pump that can be run in wider pressure limit of high compression ratio, using after the pump equivalent to improving water ring vacuum pump
Inlet pressure, therefore less water ring pump can be configured, end vacuum can reach 300pa or so, significantly reduce equipment energy
Consumption；Meanwhile improved using the pumping efficiency after the unit compared to water ring pump positive effect, vacuum is also more stablized, even in
During summer bad working environments, the normal operation of unit is nor affected on；Therefore for needing to stablize vacuum this characteristic in condenser
For, maintaining vacuum stages, the technical solution positive effect.
The invention, can be true due to being parallel way access in original pumped vacuum systems a set of condenser unit in parallel
Protect the safe and reliable of whole system.Details are as follows：
1）During condenser unit starting, original vaccum-pumping equipment is put into operation by power plant's original method of operation, to quick
Establish vacuum；
2）Condenser unit operation is normal, under vacuum stable case, and Roots vaccum pump puts into operation, to maintain vacuum,
Original vaccum-pumping equipment is shut down and is done spare；
3）When unit vacuum system generation serious leak, when Roots vaccum pump cannot maintain condenser vacuum, by original pumping
Vacuum equipment wherein one or two puts into operation to meet vacuum requirement；
4）In maintenance or equipment fault, original vaccum-pumping equipment puts into operation Roots vaccum pump, it is ensured that vacuum requirement；
5）Vacuum is mainly maintained with the Roots vacuum system that is gas-cooled during unit normal operation after transformation, is two received shipment row of a fortune
Mode, has reliable interlock control system between equipment.The security reliability of unit vacuum system will not reduce after transformation, safety
It is secure.
Specifically, every condenser unit Central Plains water-ring vacuum pump running current that is averaged is about in the prior art
160A, vacuum system tightness test 200Pa/min, the air cooling Roots vacuum system of this invention transformation employ
The configuration of JZJQY60..60.203, crew qiting power 74kW, the average current of actual motion is about 80A.It is hot in the prior art
The year run time of electric company presses 5000h, and rate for incorporation into the power network is calculated by 0.42 yuan/kwh, and the present invention can save electricity：（2 × 160-
80）× 0.56 × 5000=672000kwh, power saving rate is 75% compared with former vacuum pump operating condition；Year increase benefit is about
28.2 ten thousand yuan；And the circulating water temperature of the present invention, when reaching more than 30 DEG C, vacuum is transported than raw water ring vacuum pumps after transformation
0.5-1 kpa are averagely lifted during row, 0.5 g/ of coal consumption for power generation average value can be reduced by the practical experience estimation of power industry
Kwh, by average 550MW load operations 4 months (high water temperature operating mode, 4 months run times are calculated by 2400h), the Spring Festival holidays save standard
Coal is guarded for 660 tons, by current power coal price（Convert standard coal）500 yuan/ton of calculating, 33.0 ten thousand yuan of benefit of year increase；It is comprehensive
Total calculate understands, after the invention, annual is that the expense that power plant saves is 28.2+33.0=61.2 ten thousand yuan.
It can be seen from the above that the effect after present invention implementation is clearly, also more significantly, feasibility is high for economic benefit.
The technical solution provided above the embodiment of the present invention is described in detail, specific case used herein
The principle and embodiment of the embodiment of the present invention are set forth, the explanation of above example is only applicable to help and understands this
The principle of inventive embodiments；Meanwhile for those of ordinary skill in the art, according to the embodiment of the present invention, in specific embodiment party
There will be changes in formula and application range, in conclusion this specification content should not be construed as limiting the invention.
Claims (3)
1. a kind of steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment, it is characterised in that：Coagulated including high pressure
Vapour device and low pressure condenser, the high pressure condenser and low pressure condenser one water-ring vacuum pump of access in parallel（7）, the high pressure
Condenser includes sequentially connected first condenser（1）, the first Roots vaccum pump（2）, First Heat Exchanger（3）, described first is solidifying
The first mixture is compressed into through the first Roots vaccum pump after incondensable gas and water vapor mixture extraction in vapour device, it is described
Low pressure condenser includes sequentially connected second condenser（4）, the second Roots vaccum pump（5）, the second heat exchanger（6）, described
After incondensable gas and water vapor mixture extraction in two condensers the second mixture, institute are compressed into through the second Roots vaccum pump
State First Heat Exchanger and the second heat exchanger access water-ring vacuum pump in parallel（7）Arrival end, the water-ring vacuum pump go out
Mouth end connection steam-water separator（8）, first mixture and the second mixture are further extracted out through the water-ring vacuum pump
Incondensable gas, vapor further condense into water, and water, gas mixture are discharged into steam-water separator, and incondensable gas passes through exhaust
Pipeline is arranged to air, and water is stored in the steam-water separator and is circulated again through water-ring vacuum pump.
2. the steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment according to claim 1, its feature exists
In：The high pressure condenser further includes the first non-return valve（10）With the first quick-break valve（11）, described first non-return valve one end and the
One condenser（1）Connection, the other end connect the first quick-break valve side, and the first quick-break valve opposite side is connected to first sieve
Thatch vacuum pump（2）.
3. the steam condenser of steam turbine set vacuum according to claim 1 or claim 2 with high-low pressure condenser maintains equipment, its feature
It is：The low pressure condenser further includes the second non-return valve（12）With the second quick-break valve（13）, described second non-return valve one end with
Second condenser（4）Connection, the other end connect the second quick-break valve side, and the second quick-break valve opposite side is connected to second
Roots vaccum pump（5）.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721383549.9U CN207365738U (en) | 2017-10-25 | 2017-10-25 | A kind of steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721383549.9U CN207365738U (en) | 2017-10-25 | 2017-10-25 | A kind of steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment |
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| CN207365738U true CN207365738U (en) | 2018-05-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655351A (en) * | 2017-10-25 | 2018-02-02 | 湖南和鑫新能源技术有限公司 | A kind of steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment |
| CN109237959A (en) * | 2018-09-07 | 2019-01-18 | 华电电力科学研究院有限公司 | A kind of multi-stage dry Roots vaccum pump double pressure condenser pumped vacuum systems and method |
-
2017
- 2017-10-25 CN CN201721383549.9U patent/CN207365738U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655351A (en) * | 2017-10-25 | 2018-02-02 | 湖南和鑫新能源技术有限公司 | A kind of steam condenser of steam turbine set vacuum with high-low pressure condenser maintains equipment |
| CN109237959A (en) * | 2018-09-07 | 2019-01-18 | 华电电力科学研究院有限公司 | A kind of multi-stage dry Roots vaccum pump double pressure condenser pumped vacuum systems and method |
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