CN207050497U - Efficiently adjustable vacuum-control(led) system for power plant - Google Patents
Efficiently adjustable vacuum-control(led) system for power plant Download PDFInfo
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- CN207050497U CN207050497U CN201720737952.0U CN201720737952U CN207050497U CN 207050497 U CN207050497 U CN 207050497U CN 201720737952 U CN201720737952 U CN 201720737952U CN 207050497 U CN207050497 U CN 207050497U
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- China
- Prior art keywords
- vavuum pump
- condenser
- water circulation
- pump
- vacuum
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Abstract
A kind of efficiently adjustable vacuum-control(led) system for power plant is the utility model is related to, including：Condenser, the bleeding point that draws gas on the condenser is connected to main vapor extraction device and standby vapor extraction device, wherein described main vapor extraction device includes the positive-displacement vacuum pump connected by main extraction line with the extraction opening on the condenser, and the positive-displacement vacuum pump is serially connected with final stage water circulation vavuum pump；The positive-displacement vacuum pump is electrically connected with variable-frequency motor, and the positive-displacement vacuum pump is driven by variable-frequency motor, and the variable-frequency motor connects controller；The standby vapor extraction device includes the standby extraction line connected with the condenser, main steam line between the positive-displacement vacuum pump and condenser is provided with first switch valve, reserve steam pipeline between the one-level water circulation vavuum pump and condenser is provided with second switch valve, and described first switch valve, second switch valve are electrically operated valve, operated pneumatic valve or manually-operated gate.
Description
Technical field
It the utility model is related to the maintenance of plant condenser vacuum and energy-saving field, and in particular to a kind of for the efficient of power plant
Adjustable vacuum-control(led) system.
Background technology
Turbine condenser is the important component in thermal power plant, and low-temperature receiver is played in condensing-type unit thermodynamic cycle
Effect, turbine discharge is condensed in condenser, and vacuum is formed in condenser, and steam condensation Cheng Shuihou continues to deliver to pot
Furnace system, complete thermodynamic cycle.Unit vacuum is one of important indicator for influenceing unit economy and security.Entering steam temperature
Spend it is constant in the case of, turbine discharge temperature often reduces by 10 DEG C, and the thermal efficiency of unit about increases by 3.5%；In unit safety
In back pressure ranges, when back pressure often changes ± 1kPa, steam turbine power changes about ± 1%~2%, and this is considerable in power plant
's.If unit vacuum is too low, the effective enthalpy drop of steam in the unit can be not only caused to reduce, thermal efficiency of cycle declines, also
Turbine discharge temperature can be caused to raise, exhaust casing deformation and bearing centre change the failures such as caused vibration.In practice,
Condenser vacuum, which reduces, also causes other harm, such as causes to condense water oxygen level increase, condensate system equipment and pipe
Road be corroded caused by iron oxide enter boiler, it will corrode water-cooling wall, equipment and the pipeline such as superheater.
Not only improved recently as power plant for energy conservation emission reduction requirement, in the case of functions of the equipments are ensured, use more small-power
Equipment, plant consumption can be reduced.The former design high-capacity vacuum pump of power plant mainly considers that the unit starting stage extracts condenser
Vacuum time is established in interior air, shortening.To be formed because condenser vacuum relies primarily on turbine discharge and condensed, unit normal operation
When, Steam Condenser Leak rate very little, required vavuum pump rate of air sucked in required is much smaller than and establishes vacuum stages, therefore the unit operation stage can use
Small-power vacuum maintains system.
Some power plant attempt to transform vacuum system in recent years, and selected vacuum pump group is mostly to adjust the unit operation stage
Mass flow of drawing gas is tried to achieve, or according to declared working condition vacuum design.And in actual set running, by environment and equipment because
Element restricts, and unit is difficult to keep designing specified vacuum operation, it is also difficult to reaches unit optimum vacuum by pumped vacuum systems.And
As unit vacuum changes, also great changes will take place for vavuum pump suction flow, it is difficult to maintains design conditions.
In unit starting stage or some experiment demands, it is often necessary to change unit vacuum values to adapt to operational requirements, mesh
Preceding power plant generally destroys vacuum conditions back pressure using air admission valve or the manual drain valve of vacuum main pipe, due to air admission valve valve
Position actuating length is big and hand-operated valve is difficult to control, and is all made a big impact to unit operation security.
In view of above-mentioned, the design people is actively subject to research and innovation, a kind of for the efficiently adjustable true of power plant to found
Empty control system, make it with more the value in industry.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is that one kind is simple in construction, saves the energy, general to provide
Property the strong efficiently adjustable vacuum-control(led) system for being used for power plant.
To reach above-mentioned purpose of utility model, the utility model is used for the efficiently adjustable vacuum-control(led) system of power plant, bag
Include：Condenser, the bleeding point that draws gas on the condenser is connected to main vapor extraction device and standby vapor extraction device, wherein described
Main vapor extraction device includes the positive-displacement vacuum pump connected by main extraction line with the extraction opening on the condenser, the volume
Formula vavuum pump is serially connected with final stage water circulation vavuum pump；The positive-displacement vacuum pump electrically connects with variable-frequency motor, and the positive displacement is true
Empty pump is driven by variable-frequency motor, and the variable-frequency motor connects controller；
The standby vapor extraction device includes the standby extraction line that is connected with the condenser, on the standby extraction line
It is serially connected with one-level water circulation vavuum pump, two level water circulation vavuum pump.
Main steam line between the positive-displacement vacuum pump and condenser is provided with first switch valve, and described one
Reserve steam pipeline between level water circulation vavuum pump and condenser is provided with second switch valve, described first switch valve
Door, second switch valve are electrically operated valve, operated pneumatic valve or manually-operated gate.
Further, described positive-displacement vacuum pump, final stage water circulation vavuum pump, one-level water circulation vavuum pump, two level water
The arrival end of circulation vacuum pump is serially connected with cooling device；The advanced excessively described cooling device of medium of condenser output enters back into
Described positive-displacement vacuum pump, final stage water circulation vavuum pump, one-level water circulation vavuum pump, two level water circulation vavuum pump.
Further, described final stage water circulation vavuum pump, the gas outlet of two level water circulation vavuum pump connect carbonated drink point
Air inlet, described final stage water circulation vavuum pump, the liquid outlet of two level water circulation vavuum pump connect one end of heat exchanger from device,
The other end connection steam-water separator of heat exchanger.
Further, the overfall of steam-water separator is communicated with waste water reclaiming device.
Further, described moisture trap uses vertical structure.
Further, the cooling device includes the cooler bin with air inlet and gas outlet, the air inlet with it is described
Turbine condenser is connected, and the gas outlet is connected with vavuum pump；It is also associated with being used for the cooler bin on the cooler bin
The coolant intake pipe of interior input cooling water.
Further, muffler is connected with by connecting line at the gas outlet of the positive-displacement vacuum pump.
Further, temperature sensor is installed on the cooling water inlet of the cooling device.
Compared with prior art, the utility model has advantages below：
High-efficiency vacuum pump group, as main pump, can very well be realized and variable-frequency motor frequency conversion drive is connected using displacement type vavuum pump
Continuous response, ensure that performance and efficiency are good.Using water ring vacuum pump as fore pump, peak efficiency is maintained with power frequency operation.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of specification, with preferred embodiment of the present utility model and coordinate accompanying drawing detailed below
Describe in detail bright as after.
Brief description of the drawings
Fig. 1 is the system schematic for the efficiently adjustable vacuum-control(led) system that the utility model is used for power plant.
Embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is used to illustrate the utility model, but is not limited to the scope of the utility model.
Embodiment 1
As shown in figure 1, the present embodiment is used for the efficiently adjustable vacuum-control(led) system of power plant, including：
Condenser, the bleeding point that draws gas on the condenser are connected to main vapor extraction device and standby vapor extraction device (figure
Not shown in), wherein the main vapor extraction device includes the appearance connected by main extraction line with the extraction opening on the condenser 1
Product formula vavuum pump 4, the positive-displacement vacuum pump is serially connected with final stage water circulation vavuum pump 5；The positive-displacement vacuum pump and variable-frequency electric
Machine 7 is electrically connected, and the positive-displacement vacuum pump is driven by variable-frequency motor, and the variable-frequency motor connects controller 6.
The standby vapor extraction device includes the standby extraction line that is connected with the condenser, on the standby extraction line
It is serially connected with one-level water circulation vavuum pump, two level water circulation vavuum pump.
Main steam line between the positive-displacement vacuum pump and condenser is provided with first switch valve 2, described
Reserve steam pipeline between one-level water circulation vavuum pump and condenser is provided with second switch valve, described first switch valve
Door, second switch valve are electrically operated valve, operated pneumatic valve or manually-operated gate.
Described positive-displacement vacuum pump, final stage water circulation vavuum pump, one-level water circulation vavuum pump, two level water circulation vavuum pump
Arrival end be serially connected with cooling device 3；The advanced excessively described cooling device of medium of condenser output enters back into described appearance
Product formula vavuum pump, final stage water circulation vavuum pump, one-level water circulation vavuum pump, two level water circulation vavuum pump.
The present embodiment, during normal use, main vapor extraction device operation, when main vapor extraction device breaks down, enable standby take out
Vapour device.
Embodiment 2
The present embodiment is used for the efficiently adjustable vacuum-control(led) system of power plant, on the basis of embodiment 1, described volume
Formula vavuum pump, final stage water circulation vavuum pump, one-level water circulation vavuum pump, the arrival end of two level water circulation vavuum pump are serially connected with cold
But device；The advanced excessively described cooling device of medium of condenser output enters back into described positive-displacement vacuum pump, final stage water follows
Ring vacuum pump, one-level water circulation vavuum pump, two level water circulation vavuum pump.
Further, described final stage water circulation vavuum pump, the gas outlet of two level water circulation vavuum pump connect carbonated drink point
Air inlet, described final stage water circulation vavuum pump, the liquid outlet of two level water circulation vavuum pump connect one end of heat exchanger from device,
The other end connection steam-water separator of heat exchanger.
The cooling device includes the cooler bin with air inlet and gas outlet, the air inlet and the steam turbine condensing
Device is connected, and the gas outlet is connected with vavuum pump；It is also associated with being used to input cooling into the cooler bin on the cooler bin
The coolant intake pipe of water.Temperature sensor is installed on the cooling water inlet of the cooling device.Cooling device reduces suction
Gas temperature simultaneously, improves pump group operating efficiency.
Further, the overfall of steam-water separator is communicated with waste water reclaiming device.The cooling device include have into
Gas port and the cooler bin of gas outlet, the air inlet are connected with the turbine condenser, and the gas outlet is connected with vavuum pump；
The coolant intake pipe for inputting cooling water into the cooler bin is also associated with the cooler bin.The positive displacement vacuum
Muffler is connected with by connecting line at the gas outlet of pump.TEMP is installed on the cooling water inlet of the cooling device
Device.
Described above is only preferred embodiment of the present utility model, is not limited to the utility model, it is noted that
For those skilled in the art, on the premise of the utility model technical principle is not departed from, can also do
Go out some improvement and modification, these improvement and modification also should be regarded as the scope of protection of the utility model.
Claims (8)
- A kind of 1. efficiently adjustable vacuum-control(led) system for power plant, it is characterised in that including：Condenser, the bleeding point that draws gas on the condenser are connected to main vapor extraction device and standby vapor extraction device, wherein institute State the positive-displacement vacuum pump that main vapor extraction device includes connecting with the extraction opening on the condenser by main extraction line, the appearance Product formula vavuum pump is serially connected with final stage water circulation vavuum pump；The positive-displacement vacuum pump electrically connects with variable-frequency motor, the positive displacement Vavuum pump is driven by variable-frequency motor, and the variable-frequency motor connects controller；The standby vapor extraction device includes the standby extraction line connected with the condenser, is concatenated on the standby extraction line There are one-level water circulation vavuum pump, two level water circulation vavuum pump,Main steam line between the positive-displacement vacuum pump and condenser is provided with first switch valve, the one-level water Reserve steam pipeline between circulation vacuum pump and condenser is provided with second switch valve, described first switch valve, Two controlled valves are electrically operated valve, operated pneumatic valve or manually-operated gate.
- 2. the efficiently adjustable vacuum-control(led) system according to claim 1 for power plant, it is characterised in that described appearance Product formula vavuum pump, final stage water circulation vavuum pump, one-level water circulation vavuum pump, the arrival end of two level water circulation vavuum pump are serially connected with Cooling device；The advanced excessively described cooling device of medium of condenser output enters back into described positive-displacement vacuum pump, final stage water Circulation vacuum pump, one-level water circulation vavuum pump, two level water circulation vavuum pump.
- 3. the efficiently adjustable vacuum-control(led) system according to claim 2 for power plant, it is characterised in that described end Level water circulation vavuum pump, the gas outlet of two level water circulation vavuum pump with connecting steam-water separator air inlet, described final stage water Circulation vacuum pump, the liquid outlet of two level water circulation vavuum pump connect one end of heat exchanger, the other end connection carbonated drink point of heat exchanger From device.
- 4. the efficiently adjustable vacuum-control(led) system according to claim 3 for power plant, it is characterised in that steam-water separation The overfall of device is communicated with waste water reclaiming device.
- 5. the efficiently adjustable vacuum-control(led) system according to claim 4 for power plant, it is characterised in that described vapour Separator uses vertical structure.
- 6. the efficiently adjustable vacuum-control(led) system according to claim 5 for power plant, it is characterised in that the cooling Device includes the cooler bin with air inlet and gas outlet, and the air inlet is connected with the turbine condenser, the outlet Mouth is connected with vavuum pump；The cooling water input for inputting cooling water into the cooler bin is also associated with the cooler bin Pipe.
- 7. the efficiently adjustable vacuum-control(led) system according to claim 6 for power plant, it is characterised in that the volume Muffler is connected with by connecting line at the gas outlet of formula vavuum pump.
- 8. the efficiently adjustable vacuum-control(led) system according to claim 7 for power plant, it is characterised in that the cooling Temperature sensor is installed on the cooling water inlet of device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720737952.0U CN207050497U (en) | 2017-06-23 | 2017-06-23 | Efficiently adjustable vacuum-control(led) system for power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720737952.0U CN207050497U (en) | 2017-06-23 | 2017-06-23 | Efficiently adjustable vacuum-control(led) system for power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207050497U true CN207050497U (en) | 2018-02-27 |
Family
ID=61493117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720737952.0U Expired - Fee Related CN207050497U (en) | 2017-06-23 | 2017-06-23 | Efficiently adjustable vacuum-control(led) system for power plant |
Country Status (1)
| Country | Link |
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| CN (1) | CN207050497U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813137A (en) * | 2019-03-13 | 2019-05-28 | 西安热工研究院有限公司 | A kind of vacuum pump system that can be contributed according to suction air capacity adjustment |
-
2017
- 2017-06-23 CN CN201720737952.0U patent/CN207050497U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813137A (en) * | 2019-03-13 | 2019-05-28 | 西安热工研究院有限公司 | A kind of vacuum pump system that can be contributed according to suction air capacity adjustment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 130012 five, science research building, 3195, Wei Shan Road, Changchun high tech Zone, Jilin. Patentee after: Datang northeast electric power test and Research Institute Co., Ltd. Address before: 130012 No. 3195, Wei Shan Road, Jilin hi tech Development Zone. Patentee before: DATANG NORTHEAST ELECTRIC POWER TEST RESEARCH INSTITUTE CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180227 Termination date: 20190623 |