CN106285801A - Air cooling start control system - Google Patents
Air cooling start control system Download PDFInfo
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- CN106285801A CN106285801A CN201510319188.0A CN201510319188A CN106285801A CN 106285801 A CN106285801 A CN 106285801A CN 201510319188 A CN201510319188 A CN 201510319188A CN 106285801 A CN106285801 A CN 106285801A
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- steam
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- air cooling
- pipe line
- hydrophobic
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- 238000001816 cooling Methods 0.000 title claims abstract description 154
- 230000002209 hydrophobic effect Effects 0.000 claims description 84
- 239000007788 liquid Substances 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 16
- 238000004581 coalescence Methods 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000008676 import Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 208000033999 Device damage Diseases 0.000 description 3
- 238000006392 deoxygenation reaction Methods 0.000 description 3
- 206010060904 Freezing phenomenon Diseases 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention provides an air-cooling start control system, which is characterized in that each drain pipeline is connected with a start flash tank, high-temperature and high-pressure drain is prevented from being conveyed into an air-cooling condenser, steam is stopped from entering the air-cooling condenser and an air-cooling fan until the heat load and the steam quantity of steam output by a boiler meet the steam entering requirement of the air-cooling condenser after the boiler is ignited, and the steam enters the air-cooling condenser until the heat load and the steam quantity of the steam meet the steam entering requirement of the air-cooling condenser, so that the steam quantity and the heat load of the steam in the air-cooling steam entering pipeline are ensured, the phenomenon that the air-cooling steam entering pipeline and the air-cooling fan are frozen is effectively avoided, and the safety and the reliability of pipelines and equipment are ensured.
Description
Technical field
The present invention relates to thermal power generating technology field, be specifically related to a kind of empty cold start controlling
System.
Background technology
Currently in order to using water wisely, thermal power plant commonly uses air cooling system.Air cooling system
Although it is little that system has floor space, the advantage of water saving, but climatic adaptation ability is more weak,
At extremely frigid zones, such as Xinjiang, the Inner Mongol, the Three Eastern Provinces etc., due to length winter time, gas
Temperature is low, easily occurs air cooling blower fan to be frozen accident, even causes unit to be forced to stop time serious
Fortune, air cooling blower fan is once frozen, if not taking measure of thawing timely and effectively, will
Cause device damage.
Existing empty cold-start control system includes: boiler, steam turbine, air cooling tubes condenser,
Air cooling blower fan and controller, boiler is connected by two steam input pipe lines with steam turbine,
Can by boiler produce steam be delivered to respectively steam turbine high pressure cylinder and in, low pressure (LP) cylinder,
Steam turbine high-pressure cylinder is connected also by steam output pipe line, it is possible to by the steam in high pressure cylinder
Being transmitted back to boiler, in steam turbine, low pressure (LP) cylinder is connected with air cooling tubes condenser.This control system
System is additionally provided with for the high pressure turbine by pipeline of pass-out steam turbine high pressure cylinder with for bypassing vapour
The low voltage bypass pipeline of turbine low pressure (LP) cylinder.Additionally, in order to remove the hydrops in exception pipeline, steam
Vapour intake pipeline, steam output pipe line, high pressure turbine by pipeline and low voltage bypass pipeline are respectively
Connecting respective hydrophobic pipeline, each bar hydrophobic pipeline is connected with air cooling tubes condenser after collecting.
Air cooling tubes condenser and air cooling blower fan are respectively by air cooling steam inlet pipe line and air cooling water outlet pipeline phase
Even.
The work process of existing air cooling control system is as follows:
After ignition of the boiler, controller controls high pressure turbine by pipeline and low voltage bypass pipeline is opened,
And control the unlatching of each bar hydrophobic pipeline, so that each road High Temperature High Pressure is hydrophobic is directly entered air cooling
Condenser.Controller controls air cooling steam inlet pipe line and opens, in order to steam to air cooling blower fan conveying
Vapour, then control air cooling water outlet pipeline open, in order to by condensing hot air furnace to air cooling condensing
In device.
But, in running, there is following defect in existing air cooling control system:
In the winter of extremely frigid zones, easily there is partial freezing in air cooling steam inlet pipe line and air cooling blower fan
Phenomenon, causes pipeline and device damage.Once air cooling steam inlet pipe line and air cooling blower fan occur
Freezing, the lighter can reduce the heat transfer property of air cooling tubes condenser, and heat consumption increases, severe one air cooling
Steam inlet pipe line, by ice blockage, the breaking of vacuum in air cooling tubes condenser, causes air cooling blower fan
Finned tube deform even bursting by freezing, cause unit disorderly closedown.
Therefore, need a kind of air cooling badly and start control program, to solve above-mentioned technical problem.
Summary of the invention
The present invention is directed to above-mentioned deficiency present in prior art, it is provided that a kind of air cooling starts
Control system, in order to solve extremely frigid zones air cooling in winter start-up course hollow cold steam inlet pipe line
Problem with air cooling blower fan easy freezing.
The present invention solves above-mentioned technical problem, adopt the following technical scheme that
The present invention provides a kind of empty cold-start control system, including: boiler, steam turbine,
Air cooling tubes condenser, air cooling blower fan and controller, boiler by the first steam input pipe line and
First steam output pipe line is connected with the high pressure cylinder of steam turbine, and is inputted by the second steam
Pipeline with in steam turbine, low pressure (LP) cylinder be connected, air cooling tubes condenser and air cooling blower fan are by sky
Cold steam inlet pipe line is connected, between the first steam input pipe line and the first steam output pipe line
It is additionally provided with the high pressure turbine by pipeline of the high pressure cylinder for pass-out steam turbine, at the second steam
The low pressure (LP) cylinder for pass-out steam turbine it is additionally provided with between intake pipeline and air cooling tubes condenser
Low voltage bypass pipeline；First steam input pipe line, the second steam input pipe line, the first steaming
Vapour export pipeline, high pressure turbine by pipeline and low voltage bypass pipeline respectively with a hydrophobic pipeline
Being connected, described control system also includes starting flash vessel；Respectively with the first steam input pipe
Line, the second steam input pipe line, the first steam output pipe line, high pressure turbine by pipeline and low
Five hydrophobic pipelines that pressure by-pass line is connected all are connected with the entrance starting flash vessel；
Described control system also includes: the first pressure-detecting device and the first temperature detection dress
Putting, the first pressure-detecting device and the first temperature-detecting device are arranged at low voltage bypass pipe
In line；
Controller is used for, and after ignition of the boiler, controls high pressure turbine by pipeline and opens, and control
Make described five hydrophobic pipelines to open, in order to hydrophobic in described hydrophobic pipeline to be delivered to
Described startup flash vessel；The low voltage bypass pipeline detected according to the first pressure-detecting device
Temperature in the low voltage bypass pipeline that interior pressure and the first temperature-detecting device detect,
Control low voltage bypass pipeline to open, and control the unlatching of air cooling steam inlet pipe line, in order to air cooling
Blower fan enters vapour.
Preferably, described controller specifically for, when the first pressure-detecting device detects
Low voltage bypass pipeline in pressure more than or equal to preset first threshold, and first temperature
Temperature in the degree detection low voltage bypass pipeline that detects of device is more than or equal to the preset
During two threshold values, control low voltage bypass pipeline and open.
Preferably, described first threshold is 1.5-2.0MPa, and Second Threshold is 300-350 DEG C.
Preferably, described controller specifically for, control low voltage bypass pipeline default
Open in duration, to ensure to enter the quantity of steam of air cooling tubes condenser, and avoid low voltage bypass
Pipeline produces vibrations.
Preferably, a length of 10-30 second during the unlatching of low voltage bypass pipeline.
Concrete, described five hydrophobic pipelines can coalescence and one end of the first bilge main line
Being connected, the other end of the first bilge main line is connected with the entrance of described startup flash vessel.
Preferably, the outlet starting flash vessel is connected with boiler.
Further, described empty cold-start control system also includes oxygen-eliminating device, oxygen-eliminating device
Entrance is connected by the second bilge main line with the outlet of described startup flash vessel, oxygen-eliminating device
Outlet be connected by the 3rd bilge main line with described boiler；
In first to the 5th hydrophobic pipeline hydrophobic can via start flash vessel, second dredge
Supply mains's line, oxygen-eliminating device and the 3rd bilge main line are delivered in described boiler.
Further, being provided with drainage pump on the second bilge main line, described startup is expanded
The liquid level detection device of liquid level in detecting startup flash vessel it is provided with in container；
Described controller is additionally operable to, when the liquid level detected according to described liquid level detection device
When judging that starting the liquid in flash vessel expires, control described drainage pump and start, and control
Second bilge main line is opened.
The present invention is by being connected each bar hydrophobic pipeline with starting flash vessel, it is to avoid by high temperature
High pressure draining is delivered in air cooling tubes condenser, and after ignition of the boiler, boiler output
What the thermic load of steam and vapour amount reached air cooling tubes condenser enters before vapour requires, suspends to sky
Cold condenser and air cooling blower fan enter vapour, until the thermic load of steam and vapour amount reach air cooling and coagulate
Entering after vapour requires of vapour device just enters vapour to air cooling tubes condenser so that steam in air cooling steam inlet pipe line
The vapour amount of vapour and thermic load are guaranteed, and are prevented effectively from air cooling steam inlet pipe line and air cooling blower fan
Freezeout there is, it is ensured that pipeline and the safety and reliability of equipment.
Accompanying drawing explanation
The structural representation of the empty cold-start control system that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is carried out clearly
Chu, complete description, it is clear that described embodiment is the part enforcement of the present invention
Example rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other enforcement that technical staff is obtained on the premise of not making creative work
Example, broadly falls into the scope of protection of the invention.
Inventor finds during production practices, causes existing empty cold start controlling system
System occurs that the reason of air cooling steam inlet pipe line and air cooling blower fan freezeout is: on the one hand,
After ignition of the boiler, after the hydrophobic entrance air cooling tubes condenser in hydrophobic pipeline, steam enters sky
Cold steam inlet pipe line and air cooling blower fan dispel the heat, but, when boiler just starts to light a fire, output
Not enough or output the quantity of steam of quantity of steam unstable, additionally, air cooling steam inlet pipe line is relatively
Long, generally there are tens meters, less amount of steam is difficult to be transported to air cooling blower fan, but deposits
Stay in air cooling steam inlet pipe line, and in the winter of extremely frigid zones, ambient temperature pole
Low, the part air cooling steam inlet pipe line internal-external temperature difference retaining steam is relatively big, has thereby resulted in sky
Cold steam inlet pipe line partial freezing phenomenon.Even if steam can be transported to air cooling blower fan, enter
Quantity of steam in air cooling blower fan is the most less, and air cooling blower fan uses the most multistage cooling,
The rear end temperature more arriving air cooling blower fan is the lowest, and less amount of steam cannot arrive air cooling blower fan
Rear end, be more susceptible to the situation that finned tube freezes.On the other hand, boiler is starting
Lighting a fire during even running, the steam of output is not to start just have higher temperature
Degree, the temperature of steam gradually rises.The enthalpy of the high then steam of vapor (steam) temperature is higher,
Liberated heat can be the most, and the vapor (steam) temperature entering air cooling blower fan is the highest, are more difficult to send out
Life is freezed.Therefore, the present invention proposes a kind of empty cold-start control system, by controlling
Enter steam vapour amount and the temperature of air cooling tubes condenser, fundamentally solve air cooling steam inlet pipe line
The problem freezed with air cooling blower fan.
Below in conjunction with Fig. 1, the solution of the present invention is described in detail.
The structural representation of the empty cold-start control system that Fig. 1 provides for the embodiment of the present invention,
As it is shown in figure 1, this sky cold-start control system includes: boiler (not illustrating in figure),
Steam turbine 2, air cooling tubes condenser 1, air cooling blower fan 3 and controller (not illustrating in figure),
Boiler is by the first steam input pipe line 11 and the first steam output pipe line 14 and steam turbine 2
High pressure cylinder 21 be connected, and by the second steam input pipe line 12 with in steam turbine 2,
Low pressure (LP) cylinder 22 is connected, and air cooling tubes condenser 1 and air cooling blower fan 3 are by air cooling steam inlet pipe line 51
It is connected, also sets between the first steam input pipe line 11 and the first steam output pipe line 14
Being equipped with high pressure turbine by pipeline 13, high pressure turbine by pipeline 13 is for the high pressure of pass-out steam turbine 2
Cylinder 21.It is additionally provided with low pressure between the second steam input pipe line 12 and air cooling tubes condenser 1
By-pass line 15, low voltage bypass pipeline 15 is for the low pressure (LP) cylinder of pass-out steam turbine 1.
In order to remove the hydrops in exception pipeline, it is ensured that enter in the steam of steam turbine 2 the most aqueous
Drip, it is to avoid water droplet produces impact to turbine blade and causes turbine blade to rupture, and respectively steams
Vapour feed-line must be equipped with hydrophobic pipeline, and the i.e. first steam input pipe line 11, second steams
Vapour intake pipeline the 12, first steam output pipe line 14, high pressure turbine by pipeline 13 and low pressure
By-pass line 15 is connected with a hydrophobic pipeline respectively.As it is shown in figure 1, the first steam is defeated
Enter pipeline 11 to be connected with the first hydrophobic pipeline 31, the second steam input pipe line 12 and second
Hydrophobic pipeline 32 is connected, and the first steam output pipe line 14 is connected with the 4th hydrophobic pipeline 34,
High pressure turbine by pipeline 13 is connected with the 3rd hydrophobic pipeline 33, low voltage bypass pipeline 15 and
Five hydrophobic pipelines 35 are connected.
Described empty cold-start control system can also include starting flash vessel 4.Steam with first
The first hydrophobic pipeline 31 and the second steam input pipe line 12 that vapour intake pipeline 11 is connected
The second hydrophobic pipeline 32 of being connected, be connected with the first steam output pipe line 14 the 4th hydrophobic
Pipeline 34, with the 3rd hydrophobic pipeline 33 that high pressure turbine by pipeline 13 is connected and with low pressure by
The 5th hydrophobic pipeline 35 that road pipeline 15 is connected all is connected with the entrance starting flash vessel 4.
Start flash vessel 4 hydrophobic for collect in each hydrophobic pipeline.
Described empty cold-start control system also includes: the first pressure-detecting device 5 and first
Temperature-detecting device 6, the first pressure-detecting device 5 and the first temperature-detecting device 6 are all provided with
Putting in low voltage bypass pipeline 15, the first pressure-detecting device 5 is used for detecting low voltage bypass
Pressure in pipeline 15, the first temperature-detecting device 6 is used for detecting low voltage bypass pipeline 15
Interior temperature.
Controller is used for, and after ignition of the boiler, controls high pressure turbine by pipeline 13 and opens, and
Control described five articles of hydrophobic pipelines (the i.e. first to the 5th hydrophobic pipeline 31,32,33,34,
35) open, in order to hydrophobic in described hydrophobic pipeline is delivered to described startup flash vessel 4；
According to the pressure in the low voltage bypass pipeline 15 that the first pressure-detecting device 5 detects and
Temperature in the low voltage bypass pipeline 15 that one temperature-detecting device 6 detects, controls low pressure
By-pass line 15 is opened, and controls air cooling steam inlet pipe line 51 and open, in order to air cooling wind
Machine 3 enters vapour.
First steam input pipe line 11 is connected with the first outlet of boiler, the second steam input
Pipeline 12 is connected with the second outlet of boiler, the first steam output pipe line 14 and boiler
First import is connected.The high pressure cylinder 21 of steam turbine 2 and in, set respectively at low pressure (LP) cylinder 22
Being equipped with valve 211 and 221, when ignition of the boiler, valve 211 and 221 is turned off.Cause
This, cannot be transported to the high pressure of steam turbine 2 from the steam of the first outlet output of boiler
In cylinder 21, but via the first steam input pipe line 11, high pressure turbine by pipeline 13 and
One steam pipe line 14 is delivered to the first import of boiler.The steaming of output is exported from boiler second
Vapour also cannot be delivered in steam turbine 2, in low pressure (LP) cylinder 22, but via the second steam
Intake pipeline 12 enters low voltage bypass pipeline 15.
The present invention is by being connected each bar hydrophobic pipeline with starting flash vessel, it is to avoid by high temperature
High pressure draining is delivered in air cooling tubes condenser, and after ignition of the boiler, boiler output
What the thermic load of steam and vapour amount reached air cooling tubes condenser enters before vapour requires, suspends to sky
Cold condenser and air cooling blower fan enter vapour, until the thermic load of steam and vapour amount reach air cooling and coagulate
Entering after vapour requires of vapour device just enters vapour to air cooling tubes condenser so that steam in air cooling steam inlet pipe line
The vapour amount of vapour and thermic load are guaranteed, and are prevented effectively from air cooling steam inlet pipe line and air cooling blower fan
Freezeout there is, it is ensured that pipeline and the safety and reliability of equipment.
It should be noted that be preset with following parameter in controller:
Whether 1, first threshold, for meeting as the pressure in low voltage bypass pipeline 15
Air cooling tubes condenser enters the basis for estimation of vapour condition, it is preferred that first threshold could be arranged to
1.5-2.0MPa。
Whether 2, Second Threshold, for meeting as the temperature in low voltage bypass pipeline 15
Air cooling enters the basis for estimation of vapour condition, it is preferred that Second Threshold could be arranged to
300-350℃。
Whether 3, the 3rd threshold value, for as there are flowing out in air cooling water outlet pipeline 52
Basis for estimation, it is preferred that the 3rd threshold value could be arranged to 20-40 DEG C.
4, the 4th threshold value, for starting successful basis for estimation as air cooling blower fan 3, excellent
Choosing, the 4th threshold value could be arranged to-30～-70KPa.
Described controller specifically for, when the low pressure that the first pressure-detecting device 5 detects
Pressure in by-pass line 15 is more than or equal to the first threshold preset, and the inspection of the first temperature
Survey temperature in the low voltage bypass pipeline 15 that detects of device 6 more than or equal to the preset
During two threshold values, control low voltage bypass pipeline 15 and open.
It should be noted that in order to avoid the generation of freezeout is it is necessary to guarantee to enter sky
The steam of cold condenser 1 reaches certain temperature, but the temperature of steam again can not be unlimited
System improves, it is necessary to consistent with steam turbine rolling parameter, therefore, can be set by Second Threshold
It is set to 300 to 350.
If low voltage bypass pipeline 15 from off state to fully opened used time
Between shorter, then low voltage bypass pipeline 15 can be caused to produce strenuous vibration, thus produce noise,
And cause the device damage being connected with low voltage bypass pipeline 15.If low voltage bypass pipeline 15
Longer from off state to the fully opened time used, then steam can be caused from low
Pressure by-pass line 15 enters in air cooling tubes condenser 1 with slower speed, and with slower speed
Degree enters in air cooling admission line 51, it is impossible to ensure to enter air cooling tubes condenser 1 and air cooling enters
The quantity of steam of gas pipeline 51, then, air cooling steam inlet pipe line 51 partial freezing's phenomenon and sky
Air-cooler 3 master's phenomenon just cannot be prevented effectively from.Therefore, the opening of low voltage bypass pipeline 15
The time of opening can not be the shortest, can not be oversize.
Concrete, described controller is used for, and controls low voltage bypass pipeline 15 when default
Open in long, to ensure to enter the quantity of steam of air cooling tubes condenser 1, and avoid low voltage bypass
Pipeline 15 produces vibrations.
Concrete, a length of 10-30 second during the unlatching of low voltage bypass pipeline 15, it is preferred that
Controller can control low voltage bypass pipeline 15 from cutting out shape in the duration of about 15 seconds
State is to fully opened.Controller can be by controlling the valve on low voltage bypass pipeline 15
The size of door aperture guarantees the unlatching duration of low voltage bypass pipeline 15.
As it is shown in figure 1, first hydrophobic pipeline the 31, second hydrophobic pipeline the 32, the 3rd is hydrophobic
Pipeline the 33, the 4th hydrophobic pipeline 34 and the 5th hydrophobic pipeline 35 are hydrophobic with first after assembling
One end of main pipe line 41 is connected, the other end of the first bilge main line 41 and startup dilatation
The entrance of device 4 is connected.It is hydrophobic that hydrophobic convergence in above-mentioned five hydrophobic pipelines enters first
Main pipe line 41, is delivered to start flash vessel 4 by the first bilge main line 41, and is starting
Flash vessel 4 stores.
Preferably, the outlet starting flash vessel 4 is connected with the second import of boiler, it is possible to
Will be stored in starting in flash vessel 4 hydrophobic is transmitted back in boiler, and the water participating in boiler follows
Ring, thus reduce the water consumption of boiler.
Further, in order to reduce hydrophobic in oxygen content, it is to avoid the corruption to boiler wall
Erosion, described empty cold-start control system can also include oxygen-eliminating device 7, in order to remove hydrophobic in
Oxygen.The outlet of the entrance of oxygen-eliminating device 7 and startup flash vessel 4 is by the second bilge main
Line 42 is connected, and the second import of the outlet of oxygen-eliminating device 4 and boiler is by the 3rd bilge main
Line 43 is connected.
First hydrophobic pipeline the 31, second hydrophobic pipeline 32, the 3rd hydrophobic pipeline 33,
In four hydrophobic pipelines 34 and the 5th hydrophobic pipeline 35 hydrophobic can via first hydrophobic always
Pipeline 41, startup flash vessel the 4, second bilge main line 42, oxygen-eliminating device 5 and the 3rd are dredged
Supply mains's line 43 is delivered in boiler.
As it is shown in figure 1, be provided with drainage pump 8 on the second bilge main line 42, start
Being provided with liquid level detection device 9 in flash vessel 4, liquid level detection device 9 is used for detecting startup
Liquid level in flash vessel.
Described controller is additionally operable to, when the liquid detected according to described liquid level detection device 9
When position judges that starting the liquid in flash vessel expires, control drainage pump 8 and start, and control
Second bilge main line 42 is opened, in order to the hydrophobic conveying stored in starting flash vessel 4
To oxygen-eliminating device 7.
Air cooling blower fan 3 is connected with air cooling tubes condenser 6 by air cooling outfall sewer line 53, empty
The condensation-water drain of air-cooler 3 both sides is respectively by an air cooling water outlet pipeline 52 and air cooling
Outfall sewer line 53 is connected.The condensed water that air cooling blower fan 3 generates can be via air cooling water outlet
Pipeline 52 and air cooling outfall sewer line 53 flow into air cooling tubes condenser 1, then by air cooling tubes condenser
1 is delivered to oxygen-eliminating device 7 carries out deoxygenation process, collects eventually together with by startup flash vessel 4
Hydrophobic be delivered to boiler together.At least one air cooling outlet pipe of air cooling blower fan 3 both sides
The second temperature-detecting device (not illustrating in figure), the second temperature detection it is provided with in line 52
Device is for detecting the temperature in air cooling water outlet pipeline 52.
Controller is additionally operable to, and after controlling the unlatching of air cooling steam inlet pipe line 51, controls air cooling wind
The air cooling water outlet pipeline 52 of machine 3 both sides is opened；When second temperature-detecting device detects
When temperature in air cooling water outlet pipeline is more than or equal to three threshold value preset, condensation is described
Water flows out in the air cooling water outlet pipeline 52 of air cooling blower fan 3 both sides, then control air cooling blower fan
3 start, and control air cooling blower fan 3 and keep first frequency to run.Preferably, first frequency
Can be 15Hz.
When steam enters after air cooling blower fan 3, steam heat release is also met generation with outdoor low temperature
Condensed water, condensed water flows out in the air cooling water outlet pipeline 52 of air cooling blower fan 3 both sides, by
This causes the temperature in air cooling water outlet pipeline 52 to raise, therefore, by judging air cooling water outlet
Temperature in pipeline 52 i.e. can determine whether that the condensing hot air furnace pipeline of air cooling blower fan is the most unimpeded,
When the condensing hot air furnace pipeline of air cooling blower fan is unimpeded, air cooling blower fan 3 can be opened.
Described empty cold-start control system can also include that the second pressure-detecting device is (in figure
Do not illustrate), the second pressure-detecting device is arranged in air cooling tubes condenser 1, is used for detecting
Pressure in air cooling tubes condenser 1.
Described controller is additionally operable to, and the pressure in judging air cooling tubes condenser 1 starts to increase
Added-time, increase the frequency of air cooling blower fan 3；When the sky that the second pressure-detecting device detects
When pressure in cold condenser 1 is more than or equal to four threshold value preset, air cooling wind is described
Machine 3 starts successfully, then keep the frequency that air cooling blower fan 3 is current, and control steam turbine 2
Red switch.
It should be noted that first pressure-detecting device the 5, first temperature-detecting device 6,
Liquid level detection device the 9, second pressure-detecting device and the second temperature-detecting device are examined the most in real time
Survey, and the cycle belong to prior art to controller report testing result, above-mentioned detection process,
Do not repeat them here.
As it is shown in figure 1, be provided with valve 311 on the first hydrophobic pipeline 31, second is hydrophobic
It is provided with valve 321 on pipeline 32, the 3rd hydrophobic pipeline 33 is provided with valve 331,
It is provided with 341 on 4th hydrophobic pipeline 34, the 5th hydrophobic pipeline 35 is provided with valve
351, high pressure turbine by pipeline 13 is provided with valve 131, low voltage bypass pipeline 15 sets
Being equipped with valve 151, air cooling steam inlet pipe line 51 is provided with valve 511, two air coolings go out
Be provided with valve 521 on water pipeline 52, controller can control above-mentioned valve opening or
Close.
In order to be further appreciated by the present invention, below in conjunction with Fig. 1 and a preferred embodiment to this
The work process of empty cold-start control system is described further.
After ignition of the boiler, controller controls valve 131 and opens, in order to open high pressure turbine by
Pipeline 13 so that from the steam of the first outlet output of boiler via the first steam input pipe
Line 11, high pressure turbine by pipeline 13 and the first steam pipe line 14 are delivered to the first of boiler and enter
Mouthful.
Controller controls valve 311,321,331,341 and 351 and opens, in order to open
First hydrophobic pipeline the 31, second hydrophobic pipeline the 32, the 3rd hydrophobic pipeline the 33, the 4th is hydrophobic
Pipeline 34 and the 5th hydrophobic pipeline 35, thus by hydrophobic whole times in above-mentioned hydrophobic pipeline
Receive to starting flash vessel 4.
It should be noted that controller can control high pressure turbine by pipeline 13 and above-mentioned hydrophobic
Pipeline is opened simultaneously.
When controller judges to start flash vessel according to the liquid level that liquid level detection device 9 detects
Liquid in 4 completely time, control drainage pump 8 and start, and control valve 421 and open, with
Open the second bilge main line 42, thus the hydrophobic conveying of the interior storage of flash vessel 4 will be started
Deoxygenation process is carried out, after deoxygenation completes, via the 3rd bilge main line 43 to oxygen-eliminating device 7
It is delivered to the second import of boiler, it is achieved hydrophobic recycling.
When the low voltage bypass pipeline that the first pressure-detecting device 5 detects judged by controller
Pressure in 15 is more than or equal to 2MPa, and first temperature-detecting device 6 detects
Temperature in low voltage bypass pipeline 15 more than or equal to 350 DEG C time, control valve 151 by
Gradually open, in order to open low voltage bypass pipeline 15, thus enter vapour to air cooling tubes condenser 1.
Wherein, valve 151 from closure state to 15 seconds fully opened used times.
Controller controls valve 511 and opens, to open air cooling steam inlet pipe line 51, thus to
Air cooling blower fan 3 enters vapour.Controller can control valve 151 and valve 511 is opened simultaneously.
Then, controller controls two valves 521 again and opens, to open air cooling blower fan 3 both sides
Air cooling water outlet pipeline 52.
When the air cooling water outlet pipeline 52 that the second temperature-detecting device detects judged by controller
When interior temperature is more than or equal to 30 DEG C, controls air cooling blower fan 3 and start, and control air cooling
Blower fan 3 keeps the frequency of 15Hz to run.
When the pressure in air cooling tubes condenser judged by controller starts to increase, increase air cooling
The frequency of blower fan 3, during until the pressure in air cooling tubes condenser reaches-60kPa, keeps sky
The frequency that air-cooler 3 is current, and control steam turbine 2 red switch.
The empty cold-start control system of the present invention, due to hydrophobic pipeline no longer with air cooling condensing
Device is connected, airtight air cooling tubes condenser so that ignition of the boiler operation can be no longer by air cooling
The restriction of condenser, and by being transmitted back to boiler by hydrophobic, it is achieved that hydrophobic self-loopa,
Reduce the water consumption of boiler.Steam vapour amount be not up to required by air cooling tubes condenser minimum
Before pressure and temperature, forbid hydrophobic entrance air cooling tubes condenser, prevent owing to this part is hydrophobic
After entering air cooling tubes condenser, hot vapour goes upward to dispel the heat in air cooling steam inlet pipe line and air cooling blower fan,
The steam condensation caused by extraneous extremely low ambient temperature produces freezeout.Only full
When the pressure condition of foot low voltage bypass pipeline and temperature conditions, just enter vapour to air cooling tubes condenser,
Achieve and concentrate into vapour, it is ensured that the air inflow of steam and thermic load.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present
And the illustrative embodiments used, but the invention is not limited in this.For ability
For those of ordinary skill in territory, in the situation without departing from spirit and substance of the present invention
Under, various modification and improvement can be made, these modification and improvement are also considered as the present invention's
Protection domain.
Claims (9)
1. an empty cold-start control system, including: boiler, steam turbine, air cooling condensing
Device, air cooling blower fan and controller, boiler passes through the first steam input pipe line and the first steam
Export pipeline is connected with the high pressure cylinder of steam turbine, and by the second steam input pipe line and vapour
In turbine, low pressure (LP) cylinder be connected, air cooling tubes condenser and air cooling blower fan are by air cooling steam inlet pipe
Line is connected, and is additionally provided with between the first steam input pipe line and the first steam output pipe line
For the high pressure turbine by pipeline of the high pressure cylinder of pass-out steam turbine, at the second steam input pipe line
And it is additionally provided with the low voltage bypass of the low pressure (LP) cylinder for pass-out steam turbine between air cooling tubes condenser
Pipeline；First steam input pipe line, the second steam input pipe line, the first steam output pipe
Line, high pressure turbine by pipeline are connected with a hydrophobic pipeline respectively with low voltage bypass pipeline, its
It is characterised by,
Described control system also includes starting flash vessel；Respectively with the first steam input pipe line,
By second steam input pipe line, the first steam output pipe line, high pressure turbine by pipeline and low pressure
Five hydrophobic pipelines that road pipeline is connected all are connected with the entrance starting flash vessel；
Described control system also includes: the first pressure-detecting device and the first temperature detection dress
Putting, the first pressure-detecting device and the first temperature-detecting device are arranged at low voltage bypass pipe
In line；
Controller is used for, and after ignition of the boiler, controls high pressure turbine by pipeline and opens, and control
Make described five hydrophobic pipelines to open, in order to hydrophobic in described hydrophobic pipeline to be delivered to
Described startup flash vessel；The low voltage bypass pipeline detected according to the first pressure-detecting device
Temperature in the low voltage bypass pipeline that interior pressure and the first temperature-detecting device detect,
Control low voltage bypass pipeline to open, and control the unlatching of air cooling steam inlet pipe line, in order to air cooling
Blower fan enters vapour.
2. empty cold-start control system as claimed in claim 1, it is characterised in that institute
State controller specifically for, when the low voltage bypass pipeline that the first pressure-detecting device detects
Interior pressure is more than or equal to the first threshold preset, and the detection of the first temperature-detecting device
When temperature in the low voltage bypass pipeline arrived is more than or equal to the Second Threshold preset, control
Low voltage bypass pipeline is opened.
3. the empty cold-start control system as described in Capability Requirement 2, it is characterised in that institute
Stating first threshold is 1.5-2.0MPa, and Second Threshold is 300-350 DEG C.
4. empty cold-start control system as claimed in claim 1, it is characterised in that institute
State controller specifically for, control low voltage bypass pipeline open in default duration, with
Ensure to enter the quantity of steam of air cooling tubes condenser, and avoid low voltage bypass pipeline to produce vibrations.
5. empty cold-start control system as claimed in claim 4, it is characterised in that low
A length of 10-30 second when pressing the unlatching of by-pass line.
6. the empty cold-start control system as described in any one of claim 1-5, its feature
Being, described five hydrophobic pipelines can coalescence be connected with one end of the first bilge main line,
The other end of the first bilge main line is connected with the entrance of described startup flash vessel.
7. empty cold-start control system as claimed in claim 6, it is characterised in that open
The outlet of dynamic flash vessel is connected with boiler.
8. empty cold-start control system as claimed in claim 7, it is characterised in that institute
System of stating also includes oxygen-eliminating device, and the entrance of oxygen-eliminating device leads to the outlet of described startup flash vessel
Crossing the second bilge main line to be connected, the outlet of oxygen-eliminating device and described boiler are hydrophobic by the 3rd
Main pipe line is connected；
In first to the 5th hydrophobic pipeline hydrophobic can via start flash vessel, second dredge
Supply mains's line, oxygen-eliminating device and the 3rd bilge main line are delivered in described boiler.
9. empty cold-start control system as claimed in claim 8, it is characterised in that
Be provided with drainage pump on second bilge main line, be provided with in described startup flash vessel for
The liquid level detection device of liquid level in detection startup flash vessel；
Described controller is additionally operable to, when the liquid level detected according to described liquid level detection device
When judging that starting the liquid in flash vessel expires, control described drainage pump and start, and control
Second bilge main line is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510319188.0A CN106285801A (en) | 2015-06-11 | 2015-06-11 | Air cooling start control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510319188.0A CN106285801A (en) | 2015-06-11 | 2015-06-11 | Air cooling start control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106285801A true CN106285801A (en) | 2017-01-04 |
Family
ID=57659474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510319188.0A Pending CN106285801A (en) | 2015-06-11 | 2015-06-11 | Air cooling start control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106285801A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040182330A1 (en) * | 2001-06-21 | 2004-09-23 | Frutschi Hans Ulrich | Method for operating an internal combustion engine |
| US20060123767A1 (en) * | 2004-12-14 | 2006-06-15 | Siemens Westinghouse Power Corporation | Combined cycle power plant with auxiliary air-cooled condenser |
-
2015
- 2015-06-11 CN CN201510319188.0A patent/CN106285801A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040182330A1 (en) * | 2001-06-21 | 2004-09-23 | Frutschi Hans Ulrich | Method for operating an internal combustion engine |
| US20060123767A1 (en) * | 2004-12-14 | 2006-06-15 | Siemens Westinghouse Power Corporation | Combined cycle power plant with auxiliary air-cooled condenser |
Non-Patent Citations (2)
| Title |
|---|
| 张军承: "电站直接空冷机组调试技术分析", 《华电技术》 * |
| 李健等: "冬季启动中空冷凝汽器管束冻结分析及措施", 《东北电力技术》 * |
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