CN208860156U - A kind of working medium reclaiming type Condenser Vacuum Pressure maintains and improves system - Google Patents
A kind of working medium reclaiming type Condenser Vacuum Pressure maintains and improves system Download PDFInfo
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- CN208860156U CN208860156U CN201821442431.3U CN201821442431U CN208860156U CN 208860156 U CN208860156 U CN 208860156U CN 201821442431 U CN201821442431 U CN 201821442431U CN 208860156 U CN208860156 U CN 208860156U
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Abstract
System is maintained and improved the utility model discloses a kind of working medium reclaiming type Condenser Vacuum Pressure, including condenser of power plant, vacuum-pumping pipeline and power plant original vacuum pump group, the vacuum-pumping tube road is also connected with frequency control Roots-screw rod dry vacuum pump group；Steam extraction hand-operated valve is provided in frequency control Roots-screw rod dry vacuum pump group, steam extraction speed closes pneumatic operated valve, Roots vaccum pump, condenser and screw vacuum pump；The outlet side of the screw vacuum pump is also connected with condensate tank, and the recovered pipeline of the water outlet port of condensate tank returns condenser, is provided with multilevel water seal in the recovery pipe.The utility model can be on the basis of steam extraction rate, ultimate vacuum meet generating set service requirement, and realization is energy-saving, and can also be achieved the recycling of steam condensate (SC) working medium, avoid the waste of resource.
Description
Technical field
The utility model relates to condenser of power plant to vacuumize running technology field, especially a kind of working medium reclaiming type condensing
Device vacuum pressure maintains and improves system.
Background technique
The evacuation system for steam condenser in power plant is generally installed with the Water-ring vacuum pump group of two relatively high powers, opens in unit
It is opened simultaneously when dynamic, can be realized and quickly condenser pipe-line system is vacuumized；After generating set stable operation, generally
One vacuum pump group operation, the vacuum pump group of an interlocking back-up, operation are used to leak into the incondensable gas of vacuum system not
It releases disconnectedly, it is just out of service after generating set is stopped transport completely to maintain the vacuum of condenser system.
Power plant's conventional vacuum pump is in design selection, mainly " quickly to open the response speed and maximum permission gas leakage of machine
Amount " is Type Selection Principle, and it is about 400-600Pa/min that 300MW and the above Large-scale machine set, which design the vacuum tightness of unit, and unit
Unit vacuum tightness is generally less than 200Pa/min when normal operation, and some only has tens Pa/min.Therefore it is normally transported in unit
When going, only needing to maintain system vacuum, larger surplus capacity is had according to the conventional vacuum pump that HEI standard or professional standard configure, is existed
The excessive problem of power configuration.In addition, unit condenser vacuum is by winter 2-3KPA to summer 9- with the change of weather temperature
11KPA variation, for Generation Unit Condenser system in identical slip, the evacuation rate that summer unit needs is less than the winter
The half in season.
Due to conventional generator group be equipped with water-jetting steam extractor and Water-ring vacuum pump group, ultimate vacuum all with work water temperature
There are a much relations, the ultimate vacuum design of Water-ring vacuum pump group is usually 3.3KPA, and condensing when circulating water temperature is lower in winter
Device vacuum pressure can achieve 3.3KPA hereinafter, and cutting off as thermal power plant unit carries out flexibility transformation, especially low pressure (LP) cylinder
The development of technology, Condenser Vacuum Pressure fully achieve 3.3KPA or less.But due to being aspirated by Water-ring vacuum pump limit
The limitation of pressure, often will lead to the on-condensible gas leak into condenser can not extract out, and condenser terminal difference is caused to increase；Especially
Northern water chiller group, end difference seriously affect unit vacuum, considerably increase energy consumption up to more than ten degrees Celsius.
In addition, when condenser system vacuumizes, it is right after condensation there are also some vapor extraction in addition to extracting incoagulable gas out
Outer discharge, these condensed waters are the high-purity waters after power plant's multiple physical and chemical treatment, cause the waste of working medium.
Utility model content
The utility model technical issues that need to address be to provide a kind of working medium reclaiming type Condenser Vacuum Pressure maintain and
Plant condenser vacuum system energy consumption can be effectively reduced in raising system, and winter improves unit vacuum, and recycling condensation device of working medium has
It imitates energy saving.
In order to solve the above technical problems, technical solution adopted in the utility model is as follows.
A kind of working medium reclaiming type Condenser Vacuum Pressure maintains and improves system, including sequentially connected power plant condensing
Device, vacuum-pumping pipeline and power plant original vacuum pump group, the vacuum-pumping tube road are also connected with and power plant original vacuum pump group
The frequency control Roots being set side by side-screw rod dry vacuum pump group；It is set in the frequency control Roots-screw rod dry vacuum pump group
It is equipped with the steam extraction hand-operated valve connected by pipeline, steam extraction speed closes pneumatic operated valve, Roots vaccum pump, condenser and screw vacuum pump, pumping
Vapour speed closes controlled end one control device of connection of pneumatic operated valve, Roots vaccum pump, screw vacuum pump, the input terminal difference of control device
It is connect with the pressure sensor output end that Roots vaccum pump and screw vacuum pump is arranged in；The outlet side of the screw vacuum pump is also
Connect condensate tank, condensate tank) the recovered pipeline of water outlet port return condenser, be provided with multilevel water seal in the recovery pipe.
A kind of above-mentioned working medium reclaiming type Condenser Vacuum Pressure maintains and improves system, and the Roots vaccum pump is frequency conversion control
Speed-regulating type vacuum pump processed.
A kind of above-mentioned working medium reclaiming type Condenser Vacuum Pressure maintains and improves system, is provided on the Roots vaccum pump
Lobe pump cooling water pipeline.
A kind of above-mentioned working medium reclaiming type Condenser Vacuum Pressure maintains and improves system, is provided on the screw vacuum pump
The axle envelope of screw pump cooling water pipeline, screw vacuum pump uses airproof combination sealing.
Due to using above technical scheme, technological progress acquired by the utility model is as follows.
The utility model can be realized on the basis of steam extraction rate, ultimate vacuum meet generating set service requirement
It is energy-saving, and can also be achieved the recycling of steam condensate (SC) working medium, avoid the waste of resource.
The utility model vacuumizes operation maintenance system initial operating stage in plant condenser, utilizes the original vacuum pump in power plant
Group establishes unit vacuum rapidly, when unit operates normally, utilizes the operation of frequency-conversion speed-regulation type Roots-screw rod dry vacuum pump group
Characteristic maintains unit vacuum with low-power energy consumption, overcomes condenser in conventional power plants and vacuumizes existing for operation maintenance system
The high problem of energy consumption.The highly effective dry-type vacuum pump without sealing fluid is used in increased frequency control Roots-screw rod dry vacuum pump group
Instead of conventional water-jetting steam extractor or water ring pump, power consumption 75-83% can be reduced；And frequency control Roots-screw rod dry type is true
The operation steam extraction rate of empty pump group is not by Water Temperature, and steam extraction is stablized, and ultimate vacuum is high, winter heating season unit condensing can be improved
Device vacuum about 0.2-1.8KPA, effectively reduces the coal consumption in power plant, has saved the energy.Also, increased frequency control Roots-
Screw rod dry vacuum pump group shaft seal structure uses gas-tight combination special seal, and it is easy to solve general lobe pump, screw pump bearing chamber
The problem of water inlet seriously influences the pump group service life.In the frequency control Roots of the utility model-screw rod dry vacuum pump group, in sieve
The condenser being arranged between thatch vacuum pump and screw vacuum pump can reduce the dissolved oxygen amount of condensed water, improve the economy of unit operation
And safety.
The utility model can be recycled subsystem by condensate working medium and realized to extraction steam condensation when unit operates normally
About 200-300 tons of condensation device of working medium can be recycled in the recycling of device of working medium, 300MW unit year.
Detailed description of the invention
Fig. 1 is the architecture diagram of the utility model.
Wherein: 1, condenser of power plant；2, multilevel water seal；3, vacuum-pumping pipeline；4, steam extraction hand-operated valve；5, steam extraction speed closes gas
Dynamic valve；6, Roots vaccum pump；7, lobe pump cooling water pipeline；8, condenser；9, screw vacuum pump；10, screw pump cooling water pipe
Road；11, recovery pipe；12, condensate tank；13, control device；14, power plant original vacuum pump group.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
A kind of working medium reclaiming type Condenser Vacuum Pressure maintains and improves system, and process flow chart is as shown in Figure 1, include
Condenser of power plant 1, power plant original vacuum pump group 14, frequency control Roots-screw rod dry vacuum pump group and condensate working medium are returned
Subsystem is received, power plant original vacuum pump group and frequency control Roots-dry screw vacuum pump group are set side by side, and pass through pumping respectively
Vacuum line 3 is connect with the outlet side of condenser of power plant 1；It is dry that condensate working medium recycling subsystem is connected to frequency control Roots-
Between formula screw vacuum pump group outlet side and condenser of power plant.
Power plant original vacuum pump group is used to run in generator sets in power plant initial start stage, vacuumizes to condenser system,
To be rapidly achieved system vacuum requirement.Frequency control Roots-screw rod dry vacuum pump group is used for when unit operates normally
System vacuum is maintained, condensate working medium recycles subsystem for the real-time recycling to condensate working medium.
Steam extraction hand-operated valve 4 is provided in frequency control Roots-screw rod dry vacuum pump group, steam extraction speed closes pneumatic operated valve 5, Roots
Vacuum pump 6, condenser 8, screw vacuum pump 9 and control device 13；Wherein, steam extraction hand-operated valve 4, steam extraction speed close pneumatic operated valve 5, Roots
Vacuum pump 6, condenser 8, screw vacuum pump 9 are connected by pipeline, the steam extraction end connection vacuum-pumping pipeline 3 of steam extraction hand-operated valve 4
The outlet end connection condensate working medium of outlet side, screw vacuum pump 9 recycles subsystem arrival end.Steam extraction hand-operated valve 4 for opening manually
Close the access of frequency control Roots-screw rod dry vacuum pump group；Steam extraction speed closes pneumatic operated valve 5 and is used to work as frequency control Roots-screw rod
It cuts off rapidly when dry vacuum pump group failure and is contacted with condenser vacuum system, prevent system vacuum from declining.Roots vaccum pump 6
With the pressure sensor for being respectively arranged with detection vacuum pump pressure value on screw vacuum pump 9.
The controlled end and steam extraction speed of above-mentioned Roots vaccum pump 6 and screw vacuum pump 9 close pneumatic operated valve 5 controlled end respectively with
The output end of control device 13 connects, and receives the instruction of control device；The input terminal of control device 13 respectively with Roots vaccum pump 6
It connects with the pressure sensor output end of screw vacuum pump 9, and is in communication with each other with the DCS control system of unit, system is controlled by DCS
Coordinated control power plant original vacuum pump group of uniting and frequency control Roots-screw rod dry vacuum pump group coordinative operation.
Frequency control Roots-screw vacuum pump in the utility model during the work time, does not use working seal water, takes out
For vapour rate not by Water Temperature, final vacuum is high, and heating season can be improved unit vacuum in winter, reduce power plant coal
Consumption.In screw vacuum pump and Roots vaccum pump operational process, carried out at cooling by the cooling water pipeline being disposed thereon respectively
Reason.
It includes condensate tank 12, recovery pipe 11 and multilevel water seal 2, the inlet end of condensate tank 12 that condensate working medium, which recycles subsystem,
The outlet side of connecting screw vacuum pump 9, the recovered pipeline 11 of the water outlet port of condensate tank 12 postback plant condenser 1, multi-level water
Envelope 2 is arranged in recovery pipe 11.
The utility model at runtime, vacuumizes operation maintenance system initial operating stage, control hair in plant condenser first
The operation of power plant's original vacuum pump group meets the time that system starting requires.When system vacuum reaches service requirement, automatically switch to
Frequency control Roots-screw rod dry vacuum pump group, maintains system vacuum automatically；Power plant original vacuum pump group is stopped transport spare.In sieve
When thatch-screw vacuum pump group operation, when the Roots vaccum pump or screw vacuum failure of pump in the vacuum pump group, it can automatically switch
It is run to power plant original vacuum pump group.
The utility model is run when maintenance system operates normally according to plant condenser vacuum only leaks into a small amount of incoagulability gas
Body feature, using frequency control Roots-screw rod dry vacuum pump operation characteristic, when unit operates normally, extraction leaks into hair
The incoagulable gas of plant condenser vacuum system achievees the purpose that reduce system power dissipation；Heating Season limit of utilization is true in winter
The high characteristic of reciprocal of duty cycle improves unit condenser vacuum while low-power consumption, reduces power plant's coal consumption；Utilize multilevel water seal pipeline system
System realizes that the implementation to steam condensation water working medium is recycled, and achieves energy-saving and emission reduction purposes.
Above-described embodiment is only the most preferred embodiment of the utility model, is not made in any form to the utility model
Limitation, anyone skilled in the art, in the case where not departing from technical solutions of the utility model ambit, utilization is above-mentioned
The method content of announcement makes many possible changes and modifications to technical solutions of the utility model, belongs to claim protection
Range.
Claims (4)
1. a kind of working medium reclaiming type Condenser Vacuum Pressure maintains and improves system, including sequentially connected condenser of power plant
(1), vacuum-pumping pipeline (3) and power plant original vacuum pump group (14), it is characterised in that: also connect on the vacuum-pumping pipeline (3)
It is connected to the frequency control Roots-screw rod dry vacuum pump group being set side by side with power plant original vacuum pump group (14)；The frequency conversion tune
Be provided in fast Roots-screw rod dry vacuum pump group pipeline connection steam extraction hand-operated valve (4), steam extraction speed close pneumatic operated valve (5),
Roots vaccum pump (6), condenser (8) and screw vacuum pump (9), steam extraction speed pass pneumatic operated valve (5), Roots vaccum pump (6), screw rod are true
The controlled end of sky pump (9) connects a control device (13), the input terminal of control device respectively with setting in Roots vaccum pump (6) and
The pressure sensor output end of screw vacuum pump (9) connects；The outlet side of the screw vacuum pump (9) is also connected with condensate tank
(12), the recovered pipeline of water outlet port (11) of condensate tank (12) postbacks plant condenser (1), sets on the recovery pipe (11)
It is equipped with multilevel water seal (2).
2. a kind of working medium reclaiming type Condenser Vacuum Pressure according to claim 1 maintains and improves system, feature exists
In: the Roots vaccum pump (6) is frequency control speed-regulating type vacuum pump.
3. a kind of working medium reclaiming type Condenser Vacuum Pressure according to claim 1 maintains and improves system, feature exists
In: lobe pump cooling water pipeline (7) are provided on the Roots vaccum pump (6).
4. a kind of working medium reclaiming type Condenser Vacuum Pressure according to claim 1 maintains and improves system, feature exists
In: it is provided with screw pump cooling water pipeline (10) on the screw vacuum pump (9), the axle envelope of screw vacuum pump uses airproof group
Close sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821442431.3U CN208860156U (en) | 2018-09-04 | 2018-09-04 | A kind of working medium reclaiming type Condenser Vacuum Pressure maintains and improves system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821442431.3U CN208860156U (en) | 2018-09-04 | 2018-09-04 | A kind of working medium reclaiming type Condenser Vacuum Pressure maintains and improves system |
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| CN208860156U true CN208860156U (en) | 2019-05-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780570A (en) * | 2020-05-18 | 2020-10-16 | 华电电力科学研究院有限公司 | Air cooling tower anti-freezing system after condensation extraction back reconstruction and working method thereof |
-
2018
- 2018-09-04 CN CN201821442431.3U patent/CN208860156U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780570A (en) * | 2020-05-18 | 2020-10-16 | 华电电力科学研究院有限公司 | Air cooling tower anti-freezing system after condensation extraction back reconstruction and working method thereof |
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Address after: 050000 2nd floor, Yingpan commercial and residential building, 129 Nanxiao street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee after: Hebei Jiantou energy science and Technology Research Institute Co.,Ltd. Patentee after: HCIG GUO RONG ENERGY SERVICE Co.,Ltd. Address before: 050000 2nd floor, Yingpan commercial and residential building, 129 Nanxiao street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee before: HEBEI JI-YAN ENERGY SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Patentee before: HCIG GUO RONG ENERGY SERVICE Co.,Ltd. |