CN205505360U - Generating set backheat steady voltage blowpipe system of drawing gas - Google Patents
Generating set backheat steady voltage blowpipe system of drawing gas Download PDFInfo
- Publication number
- CN205505360U CN205505360U CN201620194046.6U CN201620194046U CN205505360U CN 205505360 U CN205505360 U CN 205505360U CN 201620194046 U CN201620194046 U CN 201620194046U CN 205505360 U CN205505360 U CN 205505360U
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- steam
- generating set
- temporary
- blowpipe
- image
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000011105 stabilization Methods 0.000 claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 241000521257 Hydrops Species 0.000 claims description 3
- 206010030113 Oedema Diseases 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000005619 thermoelectricity Effects 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 23
- 238000010926 purge Methods 0.000 description 17
- 230000000087 stabilizing effect Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 rotation bits Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model provides a generating set backheat steady voltage blowpipe system of drawing gas, including the interim system of blowpipe, the interim system of blowpipe receives the steam that the boiler produced, still includes the interim system of drawing gas, the interim system of drawing gas is followed interim pipeline is drawn forth to steam conduit behind the re -heater target plate of the interim system of blowpipe, connects generating set's high pressure feed water heater, and the reheat steam of the re -heater target plate of will flowing through carries to high pressure feed water heater and heats the feedwater of boiler, high pressure feed water heater's steam output is provided with blow -off line. The utility model discloses a sweep steam heating boiler feed water, does not need extra vapour source, therefore total fuel consumption greatly reduced, also greatly reduced the exhaust gas volumn to the heat convection volume has been reduced, so that adjust superheated steam and reheat steam's temperature better.
Description
Technical field
This utility model relates to boiler lifting field, draws gas backheat image-stabilization FCS system particularly to a kind of generating set.
Background technology
The purging of boiler superheater, reheater and steam pipe system thereof is the important procedure before new-built unit puts into operation, its
Purpose is to remove manufacturing, transport, take care of, stayed in installation process, in reheater system and jet chimney
Various foreign material (such as: sand grains, stone, rotation bits, iron scale etc.), prevent in unit operation cross, reheater
Booster and the damage of steam turbine flow passage component, the safety of raising unit and economy, and improve the steam quality of run duration,
Ensure the safe and stable operation of unit.
At present, the main blowpipe mode used is blood pressure lowering purging and voltage stabilizing two kinds of forms of purging.Wherein, voltage stabilizing purges
As indicated by a broken line in fig. 1, in figure, the direction of arrow represents steam flow to blowpipe temporary system, before purging, at high pressure
Load onto the false door core of three-port structure on cylinder air intake, for blocking the main inlet throttle-stop valve of high pressure cylinder, prevent steam from entering, will steam
Vapour is by the another one channel conductive in threeway to reheater, and equally, the air intake of intermediate pressure cylinder also connects has threeway to tie
Structure, prevents steam from entering intermediate pressure cylinder.The sweeping process of the boiler blow piping arrangement shown in Fig. 1 is: main steam line-
The automatic porthole of high pressure-interim interim door of pipe-blowpipe-interim pipe-superheater target plate-temporarily manage-cold manages again-granulating device-cold again
Pipe-reheater-heat manages the-automatic porthole of middle pressure-interim pipe-reheater target plate-interim pipe-acoustic filter again.
Image-stabilization FCS has several advantages that (1) purging parameter stability (pressure, temperature), and pipeline alternation should
Power is little；(2) in voltage stabilizing purge, reheater piping has steam to pass through all the time, it is therefore prevented that the dry combustion method of reheater；(3)
Effectively purge time is long.In supercritical unit, voltage stabilizing purging is widely applied, and achieves good purging effect
Really.
But the problem of image-stabilization FCS maximum is the difficult control of temperature of superheated steam and reheated steam, easily causes pipeline and surpass
Temperature, thus affect unit durability.In enlarging unit, typically add hot vapour source and add by drawing a road from operating unit
Heat feedwater, improves feed temperature, thus controls superheated steam and reheat steam temperature, reduce fuel quantity simultaneously.But
New-built unit does not the most possess external heat vapour source, thus is difficult to carry out image-stabilization FCS.The most newly-built 350MW surpasses
Boilers, the material of its cold pipeline again is carbon steel, and the highest allowable temperature is relatively low, considerably increases image-stabilization FCS especially
Difficulty.
For new-built unit, voltage stabilizing purging is used to have a disadvantage in that
1, narrow application range.It is only limitted to provide the old factory in stable external heat vapour source or enlarging unit to be suitable for,
Cannot apply for new-built unit.
2, vapour source is by introducing caliber and operating unit load limit.Can provide in the case of operating unit load is relatively big
A certain amount of steam source, but it is as the carrying out of image-stabilization FCS, confluent is increasing, because the restriction of caliber,
What the quantity of steam that vapour source provides cannot meet water supply point needs adds hot vapour source, frequently results in voltage stabilizing purge to water temperature
Degree only 30～40 DEG C.
3, fuel quantity can not be saved.Although improve feed temperature to a certain extent, but to consume other one
The fuel quantity of platform boiler be cost to obtain extra heating quantity of steam, thus do not play save fuel quantity work
With.
Utility model content
This utility model provides a kind of generating set to draw gas backheat image-stabilization FCS system, be used for solving in prior art for
New-built unit, does not possess external heat vapour source, the problem being difficult to carry out image-stabilization FCS.
In order to solve above-mentioned technical problem, this utility model provides a kind of generating set to draw gas backheat image-stabilization FCS system,
Including blowpipe temporary system, described blowpipe temporary system receives the steam that boiler produces, also includes the temporary system that draws gas,
The described temporary system jet chimney after the reheater target plate of described blowpipe temporary system that draws gas draws temporary pipeline, even
The high-pressure heater of sending and receiving group of motors, is delivered to the steam flowing through reheater target plate high-pressure heater and heats described boiler
Feedwater, the steam output end of described high-pressure heater is provided with blow-off line.
In an embodiment of the present utility model, described temporary pipeline adds control valve, be used for regulating described height
The air inflow of pressure heater.
In an embodiment of the present utility model, described in the temporary system that draws gas also include desuperheat branch road, be connected to described reheating
Between device target plate and described temporary pipeline, for being adjusted into the vapor (steam) temperature of described high-pressure heater.
In an embodiment of the present utility model, described desuperheat branch road includes attemperator, regulation valve and condensate pump,
Described attemperator is connected between described reheater target plate and described temporary pipeline；
Described condensate pump connects described attemperator, is used for exporting cold water to described attemperator；
Described regulation valve is arranged between the control end of described attemperator and described condensate pump, for regulating attemperator
Inflow.
In an embodiment of the present utility model, it is additionally provided with between the deafener of described attemperator and blowpipe temporary system
Thermocouple, for detecting the vapor (steam) temperature of output.
In an embodiment of the present utility model, the distance between described thermocouple and described attemperator is more than or equal to 5m.
In an embodiment of the present utility model, described temporary pipeline is additionally provided with drain water piping, is used for preventing high pressure from adding
Hydrops is formed in hot device or temporary pipeline.
In an embodiment of the present utility model, described temporary pipeline is divided into multiple branch road, and each branch road connects a hyperbaric heating
Device, is provided with the adjustable valve of aperture on every branch road, for controlling to enter the air inflow of high-pressure heater.
This programme, by boiler lifting steam is incorporated into steam turbine hyperbaric heating system, is used for heating feedwater, improve to
Coolant-temperature gage, simultaneously as use adds hot vapour source for purging steam, it is not necessary to volume outside steam, thus total fuel disappears
Consumption is substantially reduced, and has been greatly reduced exhaust gas volumn, thus has decreased the quantity of heat convection, reduces superheated steam and again
The temperature of vapours.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, attached in describing below
Figure is only embodiments more of the present utility model, for those of ordinary skill in the art, is not paying creativeness
On the premise of work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is blowpipe temporary system structure chart of the prior art；
Fig. 2 is the drawing gas interim system that the generating set of this utility model one embodiment draws gas in backheat image-stabilization FCS system
System structure chart；
Fig. 3 be the generating set of another embodiment of this utility model draw gas in backheat image-stabilization FCS system drawing gas interim
System construction drawing；
Fig. 4 is that the generating set of this utility model one embodiment draws gas backheat image-stabilization FCS system detailed structure view.
Detailed description of the invention
In order to make technical characterstic of the present utility model and effect become apparent from, below in conjunction with the accompanying drawings to skill of the present utility model
Art scheme is described further, and this utility model also can have other different instantiations be illustrated or implement, and appoints
The equivalents what those skilled in the art does within the scope of the claims belongs to protection category of the present utility model.
In this utility model one embodiment, generating set backheat image-stabilization FCS system of drawing gas includes blowpipe temporary system, institute
Stating blowpipe temporary system and receive the steam that boiler produces, blow pipe system also includes the temporary system that draws gas, as in figure 2 it is shown,
Fig. 2 is the temporary system knot that draws gas that the generating set of this utility model one embodiment draws gas in backheat image-stabilization FCS system
Composition.
The described temporary system jet chimney after the reheater target plate 101 of described blowpipe temporary system that draws gas is drawn and is faced
Shi Guandao 201, connects the high-pressure heater 301 of generating set, the steam flowing through reheater target plate is delivered to high pressure
Heater heats the feedwater of described boiler 302, and the steam output end of described high-pressure heater is provided with blow-off line 202.
It should be noted that blowpipe temporary system described herein and prior art extend image-stabilization FCS institute in unit
The blow pipe system used is identical, and device and the model of connecting line that it is specifically included by the application do not limit.
Steam in temporary pipeline 201 condenses after high-pressure heater heating feedwater, and blow-off line 202 is connected to nothing
Pressing water pipe, in order to discharged rapidly by condensed for steam water, after preventing cooling, feedwater is accumulated, and affects heat exchange.
The present embodiment, by boiler lifting steam is incorporated into turbine high-pressure heater system, is given for heating boiler
Water, improves feed temperature, simultaneously as use adds hot vapour source for purging steam, it is not necessary to volume outside steam, because of
And total Fuel Consumption is substantially reduced, it is greatly reduced exhaust gas volumn, has decreased the quantity of heat convection, more preferably controlled
Hot device and the steam temperature of reheater.
As described in Figure 2, in this utility model one embodiment, described temporary pipeline is divided into multiple branch road, and (the application is to propping up
The number on road does not limits, depending on the high-pressure heater number in generating set), each branch road connects a hyperbaric heating
Device, is provided with the adjustable valve of aperture 204 on every branch road, for controlling to enter the air inlet of each high-pressure heater
Amount and the isolation of single high-pressure heater, prevent from introducing vapor (steam) temperature and feed temperature deviation be excessive causes high-pressure heater
Internal pipeline is revealed.
Further, in the present embodiment, described temporary pipeline adds control valve 203, be used for regulating described
The air inflow of high-pressure heater.The concrete installation site of control valve is not limited by the application, generally, adjusts
Joint valve is arranged at the outlet of temporary pipeline.
In this utility model one embodiment, described temporary pipeline being additionally provided with drain water piping 208, the application is to hydrophobic
Pipeline position on temporary pipeline does not limits, it is generally the case that be arranged on minimum point branch road (as shown in Figure 3),
Drain water piping connects without pressing waterpipe, for being gradually passed through steam at early investment high-pressure heater, slowly to heat
Feedwater, prevents high-pressure heater and temporary pipeline internal water accumulation, steam from hydrops collision, water attack occurring, the most also for blowing out
Rear hydrophobic used.
Refer to Fig. 3 again, in this utility model one embodiment, in order to make purging system reliability service, described in draw gas and face
Time system also include desuperheat branch road, be connected between described reheater target plate and described temporary pipeline, be used for being adjusted into
The vapor (steam) temperature of described high-pressure heater.
Concrete, described desuperheat branch road includes attemperator 205, regulation valve 206 and condensate pump 207.Described desuperheat
Device is connected between described reheater target plate and described temporary pipeline；Described condensate pump connects described attemperator, is used for
Output cold water is to described attemperator；Described regulation valve be arranged at the control end of described attemperator and described condensate pump it
Between, for regulating the inflow of attemperator.
In this utility model one embodiment, in order to accurately control temperature, disappearing of described attemperator and blowpipe temporary system
It is additionally provided with thermocouple (i.e. after attemperator before fairlead), for detecting the vapor (steam) temperature of output between sound device 102.
The vapor (steam) temperature of this thermocouple output can transmit monitoring system afield.
Optionally, in order to ensure draw vapor (steam) temperature below 355 DEG C, position of thermocouple should be apart from attemperator 5m
(include 5m) above, make desuperheating water be sufficiently mixed with steam, prevent from measuring temperature misalignment.
In order to become apparent from that technical scheme is described, illustrate with a specific embodiment below, as shown in Figure 4,
Fig. 4 is that the generating set of this utility model one embodiment draws gas backheat image-stabilization FCS system detailed structure view.Void in Fig. 4
Line show formal pipeline, and shown in solid for temporary pipeline, main steam valve connects high pressure cylinder, during reheated steam valve connects
Cylinder pressure.The concrete specification of each pipeline is not limited by this utility model, and designer can select according to demand.
The draw gas sweeping process of backheat image-stabilization FCS system of generating set described in the utility model is used to be:
Boiler heating feedwater generates steam, and steam is delivered in main steam line after superheater, and steam is through main steaming
Vapor pipeline flows through main steam valve and faces blowpipe and flow through superheater target plate behind the door (superheater target plate is gadget, is used for testing
Card purging is the most qualified), (granulating device is gadget, is used for collecting to enter granulating device after superheater target plate
Granule that hot device is produced by boasting, soil, prevent granule and soil from polluting reheater), filter impurity through granulating device
After be delivered to reheater, after reheater piping and reheated steam valve, flow through reheater target plate, flow through reheater target plate
Steam through desuperheat branch road lower the temperature, steam one tunnel after cooling is delivered to deafener, one tunnel connect temporary pipeline, this faces
Shi Guandao draws three branch roads and is respectively connecting to three high-pressure heaters, in order to the steam after desuperheat is delivered to high pressure and adds
(in entrance high-pressure heater, the amount of steam is by hyperbaric heating steam temporary pipeline and three branch roads for the heating feedwater of hot device
Steam valve controls), through the steam condensation of high-pressure heater, by temporary pipeline output to without pressure guard tube.
Technical solutions of the utility model can bring following beneficial effect:
1) feed temperature is significantly improved.Technical solutions of the utility model have carried out reality at Inner Mongol Jing Ning power plant #1 unit
Execute, in the case of #1, #3 high-pressure heater puts into, feed temperature 26 DEG C can be promoted；At #1, #2, #3 high pressure
In the case of heater all puts into, feed temperature about 35 DEG C can be improved.
2) fuel quantity is saved.In the case of feed temperature promotes, decrease water-cooling wall entrance and owe enthalpy, Ke Yi great
The big input amount reducing fire coal.
3) reduce the temperature of superheated steam and reheated steam, increase image-stabilization FCS safety allowance.The difficulty of image-stabilization FCS
One of point is exactly superheater and the control of reheater temperature, owing to reducing fuel quantity, certainly will reduce amount of flue gas emission,
The total amount of heat convection can be greatly reduced, thus reduce the purpose of superheated steam and reheated steam, thus increase steady
The safety allowance of pressure blowpipe.
This programme, by boiler lifting steam is incorporated into steam turbine hyperbaric heating system, is used for heating feedwater, improves feedwater
Temperature.Simultaneously as use adds hot vapour source for purging steam, it is not necessary to volume outside steam, thus total fuel consumption
Amount is substantially reduced, and has been greatly reduced exhaust gas volumn, thus has decreased the quantity of heat convection, reduces superheated steam and reheating
The temperature of steam.
The above is merely to illustrate the technical scheme of the application, any those of ordinary skill in the art all can without prejudice to
Under spirit and the scope of the present utility model, above-described embodiment is modified and changes.Therefore, power of the present utility model
Profit protection domain should be as the criterion depending on right.
Claims (8)
1. generating set draws gas a backheat image-stabilization FCS system, including blowpipe temporary system, described blowpipe temporary system
Receive boiler produce steam, it is characterised in that also include the temporary system that draws gas, described in draw gas temporary system from described
Jet chimney after the reheater target plate of blowpipe temporary system draws temporary pipeline, connects the hyperbaric heating of generating set
Device, is delivered to the steam flowing through reheater target plate high-pressure heater and heats the feedwater of described boiler, described hyperbaric heating
The steam output end of device is provided with blow-off line.
2. generating set as claimed in claim 1 draws gas backheat image-stabilization FCS system, it is characterised in that face described
Control valve is added, for regulating the air inflow of described high-pressure heater on Shi Guandao.
3. generating set as claimed in claim 1 draws gas backheat image-stabilization FCS system, it is characterised in that described in draw gas
Temporary system also includes desuperheat branch road, is connected between described reheater target plate and described temporary pipeline, be used for adjusting into
Enter the vapor (steam) temperature of described high-pressure heater.
4. generating set as claimed in claim 3 draws gas backheat image-stabilization FCS system, it is characterised in that described desuperheat
Branch road includes attemperator, regulation valve and condensate pump,
Described attemperator is connected between described reheater target plate and described temporary pipeline；
Described condensate pump connects described attemperator, is used for exporting cold water to described attemperator；
Described regulation valve is arranged between the control end of described attemperator and described condensate pump, for regulating attemperator
Inflow.
5. generating set as claimed in claim 4 draws gas backheat image-stabilization FCS system, it is characterised in that subtract described
It is additionally provided with thermocouple, for detecting the vapor (steam) temperature of output between temperature device and the deafener of blowpipe temporary system.
6. generating set as claimed in claim 5 draws gas backheat image-stabilization FCS system, it is characterised in that described thermoelectricity
Distance between even and described attemperator is more than or equal to 5m.
7. generating set as claimed in claim 1 draws gas backheat image-stabilization FCS system, it is characterised in that described temporarily
It is additionally provided with drain water piping on pipeline, in being used for preventing high-pressure heater or temporary pipeline, forms hydrops.
8. generating set as claimed in claim 1 draws gas backheat image-stabilization FCS system, it is characterised in that described temporarily
Pipeline is divided into multiple branch road, and each branch road connects a high-pressure heater, is provided with the adjustable valve of aperture on every branch road,
For controlling to enter the air inflow of high-pressure heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620194046.6U CN205505360U (en) | 2016-03-14 | 2016-03-14 | Generating set backheat steady voltage blowpipe system of drawing gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620194046.6U CN205505360U (en) | 2016-03-14 | 2016-03-14 | Generating set backheat steady voltage blowpipe system of drawing gas |
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| Publication Number | Publication Date |
|---|---|
| CN205505360U true CN205505360U (en) | 2016-08-24 |
Family
ID=56727994
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620194046.6U Expired - Fee Related CN205505360U (en) | 2016-03-14 | 2016-03-14 | Generating set backheat steady voltage blowpipe system of drawing gas |
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| CN (1) | CN205505360U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650851A (en) * | 2016-03-14 | 2016-06-08 | 华北电力科学研究院有限责任公司 | Steam extraction backheating and pressure stabilizing blowpipe system of generator set |
-
2016
- 2016-03-14 CN CN201620194046.6U patent/CN205505360U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650851A (en) * | 2016-03-14 | 2016-06-08 | 华北电力科学研究院有限责任公司 | Steam extraction backheating and pressure stabilizing blowpipe system of generator set |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 |
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| CF01 | Termination of patent right due to non-payment of annual fee |