CN110529210A - A kind of method and system that heat supply steam extraction reheats - Google Patents
A kind of method and system that heat supply steam extraction reheats Download PDFInfo
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- CN110529210A CN110529210A CN201910857039.8A CN201910857039A CN110529210A CN 110529210 A CN110529210 A CN 110529210A CN 201910857039 A CN201910857039 A CN 201910857039A CN 110529210 A CN110529210 A CN 110529210A
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- steam
- steam extraction
- reheats
- heating surface
- extraction
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- 238000000605 extraction Methods 0.000 title claims abstract description 126
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 72
- 238000003303 reheating Methods 0.000 claims abstract description 21
- 239000000779 smoke Substances 0.000 claims abstract description 12
- 230000009466 transformation Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000009841 combustion method Methods 0.000 description 5
- 235000019504 cigarettes Nutrition 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses the method and system that a kind of heat supply steam extraction reheats, the method is so that vapor (steam) temperature is reached steam supply requirement using the reheating that boiler smoke carries out steam extraction under steam supply operating condition or non-steam supply operating condition.The system comprises in boiler flue or in the heating surface of the steam extraction reheating increased newly out of boiler flue is drawn bypass flue or the heating surface for the steam extraction reheating that the part tube panel of boiler flue internal heating surface is transformed, the heating surface that the steam extraction reheats passes through extraction line and steam line respectively and connect with steam extraction point interface and steam supply interface.The steam supplying method and system that heat supply steam extraction proposed by the present invention reheats, which reheat steam extraction by boiler smoke, makes vapor (steam) temperature reach steam supply requirement, and the use of steam supply operating condition and non-steam supply operating condition can be met simultaneously, it can significantly improve the adaptability of boiler steam supply.
Description
Technical field
The present invention relates to the technical fields of boiler manfacturing and transformation, more particularly, are related to a kind of heat supply steam extraction reheating
Method and system.
Background technique
In generating set, according to power plant's surrounding enviroment condition, industry or heat supply vapour demand is may be present in unit, in routine
Pumping in, be all to meet the exhaust point of parameter according to the setting of vapour parameter situation, but with the development with vapour market, exist not
It cannot exactly match by steam turbine side or boiler side setting exhaust point with vapour parameter, such as: use vapour parameter request 3.6MPa.a, 450
DEG C, it is only able to find pressure~3.6MPa.a match point, but temperature parameter can only reach~400 DEG C.
In order to meet the requirement for using vapour parameter, conventional design is that exhaust point is changed to higher temperature parameter or mixing is at higher temperature
The steam of parameter is spent, to reach steam supply temperature requirement.Such method exists following insufficient: when steam supply or not steam supply, to boiler
The safety of heating surfaces at different levels has an impact；High-quality steam parameter is used simultaneously, reduces unit efficiency.
Summary of the invention
For the problem that exhaust point temperature of the existing technology is relatively low, the present invention proposes what a kind of heat supply steam extraction reheated
Steam supplying method and system ensure that boiler can be safely operated under steam supply or not steam supply operating condition.
An aspect of of the present present invention provides a kind of method that heat supply steam extraction reheats, in steam supply operating condition or non-steam supply operating condition
Under, so that vapor (steam) temperature is reached steam supply requirement using the reheating that boiler smoke carries out steam extraction.
One embodiment for the method that heat supply steam extraction reheats according to the present invention, in boiler flue or from boiler flue
The heating surface or be changed to the part tube panel of boiler flue internal heating surface that setting steam extraction reheats in the bypass flue of extraction
The heating surface that steam extraction reheats carries out the reheating of steam extraction using the heating surface that the steam extraction reheats.
The one embodiment for the method that heat supply steam extraction reheats according to the present invention is set in the heating surface outlet that steam extraction reheats
The bypass duct being connected with boiler flue internal heating surface is set, steam extraction will be reheated using the bypass line under non-steam supply operating condition
It is mixed with steam in boiler flue internal heating surface.
One embodiment for the method that heat supply steam extraction reheats according to the present invention, in the bypass flue drawn from boiler flue
Setting shutdown controllable register in inlet reheats the temperature of steam extraction by adjusting shutdown controllable register and/or extraction flow adjusting
And/or bypass flue exports smoke temperature.
Another aspect provides the systems that a kind of heat supply steam extraction reheats, and the system comprises in boiler flue
It is interior or out of boiler flue is drawn bypass flue increase newly steam extraction reheat heating surface or will in boiler flue be heated
The heating surface that the steam extraction of the part tube panel transformation in face reheats, the heating surface that the steam extraction reheats pass through respectively extraction line and
Steam line is connect with steam extraction point interface and steam supply interface.
The one embodiment for the system that heat supply steam extraction reheats according to the present invention, the system also includes be arranged in the pumping
The bypass duct for the heating surface outlet that vapour reheats, the bypass duct is connected with boiler flue internal heating surface and and steam supply pipe
Road is arranged in parallel, and the first control valve is provided on the bypass duct.
The one embodiment for the system that heat supply steam extraction reheats according to the present invention, the bypass cigarette drawn from boiler flue
Road inlet is provided with shutdown controllable register, and the second control valve is provided on the pump-line.
The one embodiment for the system that heat supply steam extraction reheats according to the present invention, the heating surface that the steam extraction reheats use
Light pipe, H-type extended surface tube, finned tube or spiral finned tube.
The steam supplying method and system that heat supply steam extraction proposed by the present invention reheats, which reheat steam extraction by boiler smoke, to be made to steam
Stripping temperature reaches steam supply requirement, and can meet the use of steam supply operating condition and non-steam supply operating condition simultaneously, can significantly improve
The adaptability of boiler steam supply.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of the system of the reheating of heat supply steam extraction according to an illustrative embodiment of the invention.
Fig. 2 shows the schematic diagrams of Fig. 1.
Fig. 3 shows the structural representation of the system of the reheating of another exemplary embodiment heat supply steam extraction according to the present invention
Figure.
Fig. 4 shows the schematic diagram of Fig. 3.
Description of symbols:
Heating surface, the 2- extraction line, 3- steam line, 4- bypass line, the first control valve of 5-, 6- of 1- steam extraction reheating
Second control valve, 7- boiler flue internal heating surface, 8- bypass flue, 9- turn off controllable register.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
.
With certain power plant because of periphery chemical industry auxiliary steam demand, demand parameter 3.6MPa.a, 450 DEG C of middle pressure medium temperature steam.
This steam parameter, no matter all there is parameter mismatch in furnace side or pusher side steam extraction, requires to examine in conventional steam extraction design
Decompression, desuperheat equipment are considered, especially in boiler side steam extraction, after steam supply operating condition or non-steam supply operating condition, boiler side exhaust point
Heating surface is there are overtemperature possibility, i.e. there are contradictions for two kinds of operating conditions.
The purpose of the present invention mainly solves the problems, such as that exhaust point temperature is relatively low (not being able to satisfy steam supply temperature requirement), guarantees
Boiler can be safely operated under steam supply operating condition or non-steam supply operating condition.Wherein, the present invention in steam supply operating condition be steam extraction+steam supply simultaneously
The operating condition of progress, non-steam supply operating condition both include the operating condition of the steam supply of steam extraction+not, also include the operating condition of the steam supply of not steam extraction+not.
The method first reheated below to heat supply steam extraction of the present invention is specifically described.
An exemplary embodiment of the present invention, the method that the heat supply steam extraction reheats is in steam supply operating condition or non-steam supply work
So that vapor (steam) temperature is reached steam supply requirement using the reheating that boiler smoke carries out steam extraction under condition, can significantly promote boiler steam supply
Adaptability.
Specifically, in boiler flue or be arranged out of boiler flue is drawn bypass flue steam extraction reheat it is heated
Face or the heating surface that the part tube panel of boiler flue internal heating surface is changed to steam extraction reheating, are reheated using the steam extraction
The reheating of heating surface progress steam extraction.By newly-increased heating surface or transformation heating surface using the hot fume in boiler flue as steam extraction
The heat source of reheating can make steam supply reach temperature requirement.
Preferably, the present invention is also on the side that the heating surface outlet setting that steam extraction reheats is connected with boiler flue internal heating surface
Road pipeline will reheat steam extraction using bypass line under non-steam supply operating condition and mix with steam in boiler flue internal heating surface, protect
Card heating surface not dry combustion method simultaneously ensures safety.
Also, when the heating surface that steam extraction reheats is arranged out of boiler flue is drawn bypass flue, in bypass cigarette
The inlet setting shutdown controllable register in road, adjusts by adjusting shutdown controllable register and/or extraction flow and reheats steam extraction
Temperature and/or bypass flue export smoke temperature.
Such as under steam supply operating condition, shutdown controllable register is opened, enters bypass cigarette by adjusting shutdown controllable register and adjusting
The exhaust gas volumn in road, then the caloric receptivity of regulating heat surface makes it meet the requirement of extraction temperature parameter；Such as it is needed in boiler performance
When wanting, the outlet smoke temperature of shutdown controllable register and extraction flow control bypass flue is adjusted, boiler correlated performance is then adjusted
Method of the invention can solve the steam extraction situation of exhaust point " pressure unmatched, temperature not counterpart " as a result, by adding
Hot steam extraction increases steam enthalpy, then reaches pressure and temp by equal measure containing decompression and match unanimously.
The system reheated with reference to the accompanying drawing to heat supply steam extraction of the invention is described in detail.
Fig. 1 shows the structural schematic diagram of the system of the reheating of heat supply steam extraction according to an illustrative embodiment of the invention,
Fig. 2 shows the schematic diagrams of Fig. 1.Fig. 3 show another exemplary embodiment heat supply steam extraction according to the present invention reheating be
The structural schematic diagram of system, Fig. 4 show the schematic diagram of Fig. 3.
An exemplary embodiment of the present invention, the system that the heat supply steam extraction reheats include in boiler flue or
Heating surface 1 that the steam extraction increased newly out of boiler flue is drawn bypass flue 8 reheats or by boiler flue internal heating surface
The heating surface 1 that the steam extraction of part tube panel transformation reheats, the heating surface 1 that steam extraction reheats pass through extraction line 2 and steam supply respectively
Pipeline 3 is connect with steam extraction point interface and steam supply interface.Steam extraction enters steam extraction in the heating surface 1 of heating by extraction line 2 as a result,
In and with hot fume carry out the promotion that temperature is realized in heat exchange, downstream is then sent by steam line.
As depicted in figs. 1 and 2, one exemplary embodiment of the present invention is to arrange that steam extraction reheats in boiler flue
Heating surface.Specifically, the heating surface 1 that steam extraction reheats is increased newly in the suitable position of boiler flue, which reheats heated
Face 1 is connected with steam extraction point interface by extraction line 2 and is connected by steam line 3 with steam supply interface.Also, it is of the invention
System further includes the bypass duct 4 that the heating surface 1 of steam extraction reheating is arranged in and exports, in bypass duct 4 and boiler flue other
Heating surface is connected and is arranged in parallel with steam line 3, and the first control valve 5 is provided on the bypass duct 4 to control shunt valve
The shutdown in road 4 and flow.As a result, under steam supply operating condition, steam extraction in the heating surface 1 that steam extraction reheats and hot fume heat exchange after,
Steam line 3 is sent into after reaching the requirement with vapour parameter；And under non-steam supply operating condition, steam extraction then passes through by-pass line 4 and boiler
It is the case where steam mixing in flue in certain grade of heating surface, dry combustion method is not present in the heating surface 1 for reheating steam extraction, heated to guarantee
Face safety.
As shown in Figure 3 and Figure 4, another exemplary embodiment of the invention is to arrange that steam extraction reheats in bypass flue
Heating surface.Specifically, bypass flue 8 is drawn in the suitable position aperture of boiler flue and draw flue gas, in gas bypass pipe
Increase the heating surface 1 that steam extraction reheats in road 8 newly, and 8 inlet of bypass flue preferably at this from boiler flue extraction is set
It is equipped with shutdown controllable register 9.As a result, under steam supply operating condition, reaches steam extraction by hot fume heating steam extraction and wanted with vapour parameter
It asks, open shutdown controllable register 9 and the exhaust gas volumn entered in bypass flue is adjusted by controllable register, and adjust caloric receptivity to make to take out
Vapour meets the requirement of extraction temperature parameter；In non-steam supply operating condition, shutdown controllable register 9 is closed, closes exhaust point, i.e., by off-the-line
The operation of road flue and the heat exchange for separating heater guarantee heating surface not dry combustion method.In addition, boiler performance needs if not needing steam supply
When wanting, bypass can not also be closed, by adjusting shutdown controllable register 9 and exhaust point flow, controls the outlet cigarette of bypass flue 8
Temperature reaches the demand for adjusting boiler correlated performance.
In addition, the heating surface that steam extraction reheats in the present invention can use light pipe, H-type extended surface tube, finned tube or spiral fin
The casts such as piece pipe are preferably provided with the second control valve 6 on pump-line 2 to realize shutdown and flow control.
The present invention is further explained in the light of specific embodiments.
Embodiment 1: the heating surface that arrangement steam extraction reheats in boiler flue
Increase the heating surface 1 (the present embodiment is heater) that arrangement steam extraction reheats in boiler flue and heat steam extraction, makes
It reaches the requirement with vapour parameter；Bypass line 2 is set in the outlet of heater, in the unwanted situation of steam supply, steam extraction adds
Steam after heat is mixed by bypass line 2 with the steam in boiler grade heating surface, makes heater that long-term dry combustion method be not present, with
Guarantee heating surface safety.
The present embodiment with certain 330MW unit periphery is 3.6MPa.a with vapour demand parameter, 450 DEG C of middle pressure medium temperature steam is
Example.Exhaust point temperature parameter temperature is lower than 415 DEG C of steam, since temperature is not achieved with vapour parameter request, passes through boiler flue
The heater of interior arrangement further heats, its temperature is made to reach 450 DEG C, meets and uses vapour parameter, and design parameter is as shown in table 1.
Steam extraction steam supply parameter in 1 embodiment 1 of table
Embodiment 2: the heating surface that arrangement steam extraction reheats in bypass flue
Flue gas is drawn in the suitable flue of boiler flue and does a bypass flue, and shutdown is set in bypass flue import and is adjusted
The heating surface 1 (the present embodiment is heater) that steam extraction reheats is arranged, in the unwanted feelings of steam supply in baffle 4 in bypass flue
Under condition, shutdown controllable register 4 can be closed.
According to the overall situation of boiler performance, in not steam supply, bypass smoke or adjusting are adjusted by shutdown controllable register 4
The steam flow of steam extraction, control bypass flue 8 export smoke temperature to reach the demand for adjusting boiler performance；Alternatively, after steam extraction heating
Steam mix with the steam in boiler grade heating surface by bypass line 4, making heater, there is no dry combustion methods, are heated with guarantee
Face safety.
The present embodiment still vapour demand parameter with certain 330MW unit periphery is 3.6MPa.a, 450 DEG C of middle pressure medium temperature is steamed
For vapour.Exhaust point temperature parameter temperature is lower than 415 DEG C of steam, since temperature is not achieved with vapour parameter request, passes through bypass
Flue internal heating surface further heats, its temperature is made to reach 450 DEG C, meets and uses vapour parameter, and design parameter is as shown in table 2 below.
Steam extraction steam supply parameter in 2 embodiment 2 of table
| Title | Unit | 330MW | 300MW | 280MW | 230MW | 150MW | 100MW |
| 1. steam supply parameter | |||||||
| Pressure of steam supply | MPa.a | 3.6 | 3.6 | 3.6 | 3.6 | 3.6 | - |
| For stripping temperature | ℃ | 450 | 450 | 450 | 450 | 450 | - |
| 2. exhaust point parameter | |||||||
| Snap shot pressure | MPa.a | 5.03 | 4.89 | 4.78 | 4.57 | 4.32 | 3.72 |
| Snap shot temperature | ℃ | 415 | 410 | 390 | 375 | 380 | 363 |
| 3. bypass flue parameter | |||||||
| Heater outlet pressure | MPa.a | 3.92 | 3.88 | 3.81 | 3.76 | 3.67 | 2.24. |
| Heater outlet temperature | ℃ | 450 | 450 | 450 | 450 | 450 | 400 |
| Bypass flue gas share | % | 23.7 | 24.1 | 24.8 | 28.6 | 29.2 | 31.6 |
Note: 100MW is to adjust boiler performance under non-steam supply operating condition.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (8)
1. a kind of method that heat supply steam extraction reheats, which is characterized in that under steam supply operating condition or non-steam supply operating condition, utilize boiler smoke
The reheating that gas carries out steam extraction makes vapor (steam) temperature reach steam supply requirement.
2. the method that heat supply steam extraction reheats according to claim 1, which is characterized in that in boiler flue or from boiler
Flue draw bypass flue in setting steam extraction reheat heating surface or by the part tube panel of boiler flue internal heating surface more
It is changed to the heating surface of steam extraction reheating, the reheating of steam extraction is carried out using the heating surface that the steam extraction reheats.
3. the method that heat supply steam extraction reheats according to claim 2, which is characterized in that go out in the heating surface that steam extraction reheats
The bypass duct that mouth setting is connected with boiler flue internal heating surface will be reheated under non-steam supply operating condition using the bypass line
Steam extraction is mixed with steam in boiler flue internal heating surface.
4. the method that the heat supply steam extraction according to Claims 2 or 3 reheats, which is characterized in that is drawn from boiler flue
Setting shutdown controllable register in bypass flue inlet is adjusted to reheat and be taken out by adjusting shutdown controllable register and/or extraction flow
The temperature and/or bypass flue of vapour export smoke temperature.
5. the system that a kind of heat supply steam extraction reheats, which is characterized in that the system comprises in boiler flue or from boiler
The heating surface that the steam extraction increased newly in the bypass flue that flue is drawn reheats or the part tube panel by boiler flue internal heating surface
The heating surface that the steam extraction of transformation reheats, the heating surface that the steam extraction reheats pass through extraction line and steam line and pumping respectively
Vapour point interface is connected with steam supply interface.
6. the system that heat supply steam extraction reheats according to claim 5, which is characterized in that the system also includes be arranged in institute
State steam extraction reheating heating surface outlet bypass duct, the bypass duct be connected with boiler flue internal heating surface and with confession
Steam pipe road is arranged in parallel, and the first control valve is provided on the bypass duct.
7. the system reheated according to the heat supply steam extraction of claim 5 or 6, which is characterized in that described to be drawn from boiler flue
Bypass flue inlet be provided with shutdown controllable register, the second control valve is provided on the pump-line.
8. the system that heat supply steam extraction reheats according to claim 5, which is characterized in that the heating surface that the steam extraction reheats
Using light pipe, H-type extended surface tube, finned tube or spiral finned tube.
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| CN201910857039.8A CN110529210B (en) | 2019-09-11 | 2019-09-11 | Method and system for reheating heat supply steam extraction |
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| CN201910857039.8A CN110529210B (en) | 2019-09-11 | 2019-09-11 | Method and system for reheating heat supply steam extraction |
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| CN110529210B CN110529210B (en) | 2024-05-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431643A (en) * | 2021-08-04 | 2021-09-24 | 西安热工研究院有限公司 | Low-pressure industrial steam supply system combining condensate system and boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431643A (en) * | 2021-08-04 | 2021-09-24 | 西安热工研究院有限公司 | Low-pressure industrial steam supply system combining condensate system and boiler |
| CN113431643B (en) * | 2021-08-04 | 2022-08-02 | 西安热工研究院有限公司 | Low-pressure industrial steam supply system combining condensate system and boiler |
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