CN206160756U - Two backpressure condenser vacuum systems based on roots vacuum pump group - Google Patents
Two backpressure condenser vacuum systems based on roots vacuum pump group Download PDFInfo
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- CN206160756U CN206160756U CN201621047591.9U CN201621047591U CN206160756U CN 206160756 U CN206160756 U CN 206160756U CN 201621047591 U CN201621047591 U CN 201621047591U CN 206160756 U CN206160756 U CN 206160756U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 description 8
- 230000005611 electricity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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Abstract
The utility model provides a two backpressure condenser vacuum systems based on roots vacuum pump group, including roots vacuum pump group, the 2nd roots vacuum pump group, a water ring vacuum pump, the 2nd water ring vacuum pump, first condenser and second condenser, wherein through a pipeline and a condenser connected behind a roots vacuum pump group and the water ring vacuum pump parallel connection, through pipeline and the 2nd condenser connected behind the 2nd roots vacuum pump group and the 2nd water ring vacuum pump parallel connection, simultaneously, roots vacuum pump group, a water ring vacuum pump, the 2nd roots vacuum pump organizes and the 2nd water ring vacuum pump's inlet pipe on install a manually -operated valve, the 2nd manually -operated valve, the 3rd manually -operated valve and fourth manually -operated valve respectively. The utility model discloses an adopt roots vacuum pump group and carry out parallel operation to high low back pressure condenser, can effectively improve vapour turbine system's economic security nature.
Description
Technical field
The utility model belongs to mechanical field, and in particular to a kind of double pressure condenser vacuum based on Roots vacuum pump group
System.
Background technology
Steam Turbine Condenser Vacuum system of the prior art has high back pressure condenser and low back pressure condenser and employing
Serial arrangement, extract system draws respectively remittance to a main pipe Jing vacuum pumped using high-low pressure condenser, loses
There is the uneven phenomenon of high and low pressure condenser pumping in the operation characteristic of double back pressures, this kind of arrangement, cause to leak in condenser
The air in portion can not be extracted out in time, and air accumulates in condenser inside (mainly low pressure condenser), have impact on heat exchange, and then
Condenser pressure (unit vacuum) is have impact on, makes the high and low pressure lateral pressure difference of double pressure condenser unobvious, low pressure condenser
Operation cleanliness factor higher pressure condenser operation cleanliness factor is substantially low.If using double back pressures between height back pressure condenser
Operation characteristic, two water ring vacuum pumps run simultaneously, and power consumption is high, and efficiency is low, increases station service.
Meanwhile, in the design of thermal power plant condenser vacuum system, water ring vacuum pump is taken out as incondensable gas in condenser
Gas equipment, this is also the mainstay of current international evacuation system for steam condenser, there is irreplaceable effect, but right
In some power plant, because the vavuum pump selected is the big unit pump of compression ratio, however not excluded that the reason for user uses upper, these cause
Vavuum pump Jing often breaks down, and power consumption height, efficiency are low, directly threaten the stable operation of power plant, vacuum system to become and perplex these
One hidden danger of power plant.
Utility model content
The purpose of this utility model is the shortcoming for overcoming above-mentioned prior art, there is provided a kind of efficiency high, energy consumption are low, safety
Economic condenser vacuum system.
The purpose of this utility model is by the following technical programs solving：
A kind of double pressure condenser vacuum system based on Roots vacuum pump group, including the first Roots vacuum pump group, second
Roots vacuum pump group, the first water ring vacuum pump, the second water ring vacuum pump, the first condenser and the second condenser, wherein described
One Roots vacuum pump group is connected by pipeline after being connected in parallel with the first water ring vacuum pump with the first condenser, second Roots
Vacuum pump group is connected by pipeline after being connected in parallel with the second water ring vacuum pump with the second condenser, meanwhile, it is true in the first Roots
It is separately installed with the inlet duct of empty pump group, the first water ring vacuum pump, the second Roots vacuum pump group and the second water ring vacuum pump
First manual valve, the second manually-operated gate, the 3rd manually-operated gate and the 4th manually-operated gate.
Further, an isolating valve is installed on the connecting pipe between first condenser and the second condenser.
Further, first condenser is high back pressure condenser, and the second condenser is low back pressure condenser.
Further, the pipeline is seamless steel pipe.
Further, the first Roots vacuum pump group and the second Roots vacuum pump group include Roots vaccum pump body, the
One cooler, water ring vacuum pump, steam-water separator and the second cooler, wherein, the Roots vaccum pump body and Water-ring vacuum
Pump arrange in a series arrangement and between be also associated with the first cooler, while water ring vacuum pump and steam-water separator and the second cooling
Device is connected, and the second cooler is also connected with steam-water separator and the first cooler outlet end.
Further, first cooler and the second cooler are heat-exchangers of the plate type.
Relative to prior art, the utility model has following beneficial effect：
First, reach the double back pressure operating modes operation of realization by changing parallel connection to vacuum system series connection, double pressure condenser it is flat
Back pressure places an order the back pressure of back pressure condenser less than equal conditions, is the enthalpy drop increase of steam turbine low pressure (LP) cylinder, so as to improve steamer
The economy of machine, security.The average back pressure of single unit reduces about 1KPa, and converting into net coal consumption rate reduces about 1.5g/kwh, deducts
The electricity that many one vavuum pumps of operation increase, it is comprehensive to reduce net coal consumption rate about 1.34g/kwh, year about 4020 tons of standard coal is saved,
It is roughly equal to 1,600,000 yuan, energy-saving effect highly significant.Secondly, Roots vacuum pump group can greatly reduce than original water ring vacuum pump
Electric current, on the basis of coal consumption is not increased, pump group economize on electricity 68% is calculated, station-service Roots vacuum pump group by unit load rate 65%
Electric rate can decline 0.041%, and energy-saving effect is notable.
Description of the drawings
Fig. 1 is condenser vacuum system figure of the present utility model；
Fig. 2 is the utility model Roots vacuum pump group figure.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1, a kind of double pressure condenser vacuum system based on Roots vacuum pump group, including the first Roots vaccum pump
Group, the second Roots vacuum pump group, the first water ring vacuum pump, the second water ring vacuum pump, the first condenser and the second condenser, wherein
The first Roots vacuum pump group is connected by pipeline after being connected in parallel with the first water ring vacuum pump with the first condenser, and described
Two Roots vacuum pump groups are connected by pipeline after being connected in parallel with the second water ring vacuum pump with the second condenser, meanwhile, first
On the inlet duct of Roots vacuum pump group, the first water ring vacuum pump, the second Roots vacuum pump group and the second water ring vacuum pump respectively
First manual valve, the second manually-operated gate, the 3rd manually-operated gate and the 4th manually-operated gate are installed.First condenser and second coagulates
An isolating valve is also equipped with connecting pipe between vapour device.First condenser be high back pressure condenser, the second condenser
For low back pressure condenser, while the pipeline is seamless steel pipe.Two Roots vacuum pump groups are run, and each individually suction is corresponding
Incondensable gas in condenser, realizes height differential back, and when separate unit Roots vacuum pump group pump trips, logic automatic linkage water ring is true
Empty pump.The double back pressure operating mode operations of realization are reached by changing parallel connection to vacuum system series connection, the average back pressure of double pressure condenser is low
Place an order the back pressure of back pressure condenser in equal conditions, is the enthalpy drop increase of steam turbine low pressure (LP) cylinder, so as to improve the economy of steam turbine
Property, security.The average back pressure of single unit reduces about 1KPa, and converting into net coal consumption rate reduces about 1.5g/kwh, deducts many operations one
The electricity that platform vavuum pump increases, comprehensive to reduce net coal consumption rate about 1.34g/kwh, year saves about 4020 tons of standard coal, is roughly equal to 1,600,000
Unit, energy-saving effect highly significant；Referring to Fig. 2, the first Roots vacuum pump group and the second Roots vacuum pump group include Roots vaccum pump
Body, the first cooler, water ring vacuum pump, steam-water separator and the second cooler, wherein, the Roots vaccum pump body and water
Ring vacuum pump arrange in a series arrangement and between be also associated with the first cooler, while water ring vacuum pump and steam-water separator and the
Two coolers are connected, and the second cooler is also connected with steam-water separator and the first cooler outlet end.First cooling
Device and the second cooler are preferably heat-exchangers of the plate type.Roots vacuum pump group is a kind of rotary positive-displacement vavuum pump.Its maximum
Advantage can be suction the gas containing moisture content, have higher pumping efficiency in relatively low inlet pressure, it be lobe pump and
Vavuum pump arranged in series.Roots vaccum pump compression ratio is little (general<1:3), the operation interval of Roots vaccum pump 0.01～
In 1kpa pressure limits.That is, common Roots vaccum pump must allow ability under inlet pressure (certain vacuum degree) certain
Start.When the pressure in system is extracted into the inlet pressure of Roots vaccum pump permission by prime water ring vacuum pump, Roots vaccum pump
Just start working, a large amount of water vapours are contained using water ring vacuum pump as fore pump for evacuation system for steam condenser.Roots is true
Empty system advantage is that the system that can guarantee that condenser is run steadily in the long term；The discrepancy side pressure difference of Roots vaccum pump is little, the damage of equipment
It is bad few, it is relative to make service life of equipment long.By the way of Roots vacuum pump group, can subtract significantly than original water ring vacuum pump
Few electric current, but have a premise here, is exactly to require when the actual air leakage rate of condenser is much smaller than water ring vacuum pump type selecting
Air leakage rate.For example, water ring vacuum pump originally is and the power plant according to the condenser air leakage rate type selecting of 60kg/h
The actual air leakage rate of vacuum system may without so big, so, Roots vaccum pump according to 30kg/h condenser air
Leakage rate type selecting just can be with.Therefore, the actually exhaust capacity of Roots vaccum pump is less than original water ring vacuum pump, electric current
It is less than original water ring vacuum pump.Former crew qiting water ring vacuum pump 132KW rated power is higher, novel roots vacuum pump group
The type selecting pump group of rated power≤44KW substitutes raw water ring vacuum pump, substantially reduces station service needed for vavuum pump, Roots vaccum pump
On the basis of coal consumption is not increased, pump group economize on electricity 68% is calculated group by unit load rate 65%, and station service power consumption rate can decline
0.041%, can save by annual 3000000000 degree of electricity, station service saves 1,230,000 degree, saves 430,000 yuan, reaches energy-saving purpose.
The double pressure condenser vacuum system based on Roots vacuum pump group in sum, two total 2,030,000 yuan of savings.
Claims (6)
1. a kind of double pressure condenser vacuum system based on Roots vacuum pump group, it is characterised in that including the first Roots vacuum
Pump group, the second Roots vacuum pump group, the first water ring vacuum pump, the second water ring vacuum pump, the first condenser and the second condenser, its
Described in the first Roots vacuum pump group by pipeline and the first water ring vacuum pump be connected in parallel after be connected with the first condenser, it is described
Second Roots vacuum pump group is connected after being connected in parallel by pipeline and the second water ring vacuum pump with the second condenser, meanwhile, the
Divide on the inlet duct of one Roots vacuum pump group, the first water ring vacuum pump, the second Roots vacuum pump group and the second water ring vacuum pump
First manual valve, the second manually-operated gate, the 3rd manually-operated gate and the 4th manually-operated gate are not installed.
2. the double pressure condenser vacuum system based on Roots vacuum pump group according to claim 1, it is characterised in that institute
State and an isolating valve is installed on the connecting pipe between the first condenser and the second condenser.
3. the double pressure condenser vacuum system based on Roots vacuum pump group according to claim 1 and 2, its feature exists
In first condenser is high back pressure condenser, and the second condenser is low back pressure condenser.
4. the double pressure condenser vacuum system based on Roots vacuum pump group according to claim 1 and 2, its feature exists
In the pipeline is seamless steel pipe.
5. the double pressure condenser vacuum system based on Roots vacuum pump group according to claim 1, it is characterised in that institute
State the first Roots vacuum pump group and the second Roots vacuum pump group include Roots vaccum pump body, the first cooler, water ring vacuum pump,
Steam-water separator and the second cooler, wherein, the Roots vaccum pump body and water ring vacuum pump are arranged in a series arrangement and it
Between be also associated with the first cooler, while water ring vacuum pump is connected with steam-water separator and the second cooler, the second cooler
Also it is connected with steam-water separator and the first cooler outlet end.
6. the double pressure condenser vacuum system based on Roots vacuum pump group according to claim 5, it is characterised in that institute
State the first cooler and the second cooler is heat-exchangers of the plate type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621047591.9U CN206160756U (en) | 2016-09-09 | 2016-09-09 | Two backpressure condenser vacuum systems based on roots vacuum pump group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621047591.9U CN206160756U (en) | 2016-09-09 | 2016-09-09 | Two backpressure condenser vacuum systems based on roots vacuum pump group |
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| Publication Number | Publication Date |
|---|---|
| CN206160756U true CN206160756U (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621047591.9U Active CN206160756U (en) | 2016-09-09 | 2016-09-09 | Two backpressure condenser vacuum systems based on roots vacuum pump group |
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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 |
-
2016
- 2016-09-09 CN CN201621047591.9U patent/CN206160756U/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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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 714206 8th floor, block B, Xi'an Hongxiang building, No. 90, Xingqing Road, Beilin District, Xi'an City, Shaanxi Province Patentee after: Datang Qinling Power Generation Co.,Ltd. Address before: 714206 Luofu Industrial Park, Huayin City, Weinan City, Shaanxi Province Patentee before: HUANENG SHAANXI QINLING POWER GENERATION CO.,LTD. |