CN107388229A - A kind of adjustable joint backheating system - Google Patents
A kind of adjustable joint backheating system Download PDFInfo
- Publication number
- CN107388229A CN107388229A CN201710773972.8A CN201710773972A CN107388229A CN 107388229 A CN107388229 A CN 107388229A CN 201710773972 A CN201710773972 A CN 201710773972A CN 107388229 A CN107388229 A CN 107388229A
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- Prior art keywords
- final stage
- additional adjustable
- heat exchanger
- adjustable rear
- additional
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/325—Schematic arrangements or control devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Turbines (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a kind of adjustable joint backheating system, high pressure cylinder including steam turbine, additional adjustable rear final stage extraction opening on the high pressure cylinder, drawn gas with the additional adjustable rear final stage of the high pressure cylinder as the heat exchanger of thermal source, the additional adjustable rear final stage feed-water heater using the steam discharge of the heat exchanger as thermal source；Additional adjustable rear final stage extraction line, the adjustable extraction control valve being arranged on the additional adjustable rear final stage extraction line.Additional adjustable rear final stage is drawn gas after the hot Secondary Air of heat exchanger heating boiler or boiler heat primary air or boiler powder feeding, the additional adjustable rear further supplementary heating feedwater of final stage feed-water heater is drained into again, not only it is effectively utilized the degree of superheat that this grade draws gas, it heated boiler hot Secondary Air or boiler heat primary air or boiler powder feeding, the lifting of the stabilization and efficiency of combustion of lifting, the boiler combustion of pulverized coal preparation system output is realized, and reduce further cost.
Description
Technical field
The present invention relates to field of thermal power, more particularly to a kind of adjustable joint backheating system.
Background technology
Currently, China's electric power mainly undertakes peak regulation by thermal power generation unit, thermal power generation unit underrun into
For normality.With China《Electric power development " 13 " is planned（2016-2020）》Formal issue, " strengthen peak modulation capacity build
If lifting system flexibility " is already as one of important task of thermal power generation unit, it means that to the depth of thermal power generation unit
Peak regulation and system flexibility propose higher requirement, in fact, thermal power generation unit in underrun, be in the presence of environmental protection,
Many problems such as safety, economy, including SCR denitration device need problem out of service, boiler hydrodynamics instability problem, boiler
Low problem of combustion instability, cycle efficieny etc..
For SCR denitration need problem out of service, boiler hydrodynamics instability problem, cycling hot caused by above-mentioned underload
The low problem of efficiency, Chinese patent ZL201110459533.2 discloses a kind of adjustable feed water heat regenerative, i.e., relatively conventional
For Turbo-generator Set, the final stage extraction pressure set on high pressure cylinder is higher than the high pressure cylinder highest extraction pressure of routine；And
Extraction control valve is set on the final stage extraction line, then by feed-water heater come regenerative feed-water.In running, pass through
The valve can draw gas to final stage and be adjusted, so as to keep the pressure after extraction control valve to be basically unchanged in unit varying duty,
And the temperature of the feedwater of boiler is maintained to be basically unchanged by final stage feed-water heater.
However, the system and method that the patent provides still suffers from weak point, in each load stage, the level is drawn gas to be needed unit
The pressure that throttling maintains extraction control valve is carried out, especially when compared with underload, its degree of superheat of drawing gas can be relatively large, causes to increase
If feed-water heater heat transfer temperature difference it is larger, irreversible loss increase, in other words, the adjustable final stage set up, which is drawn gas, not to be obtained
Very effective utilization；Still further aspect, because this grade of extraction temperature is higher, can cause corresponding tubing and feed-water heater into
This increase, especially with the continuous improvement of unit parameter, such as 700 DEG C of units, because corresponding extraction temperature is too high, it can lead
Feed-water heater is caused to be difficult under existing manufacturing process.
The content of the invention
In view of this, solve above-mentioned low load stage problem encountered in order to integrate and disclosed adjustable feed water back
The weak point of hot systems, the invention provides a kind of adjustable joint backheating system.
The present invention provides a kind of adjustable joint backheating system, it is characterised in that：Including
The high pressure cylinder of steam turbine；
Additional adjustable rear final stage extraction opening on the high pressure cylinder, the pressure of drawing gas of the additional adjustable rear final stage extraction opening
The power non-dimmable formula final stage extraction pressure conventional higher than the high pressure cylinder（It is ranked up according to condensate, feedwater medium flow direction, quite
Drawn gas in the final stage in conventional rack without regulation）；
Drawn gas with the additional adjustable rear final stage of the high pressure cylinder as the heat exchanger of thermal source；
Additional adjustable rear final stage feed-water heater using the steam discharge of the heat exchanger as thermal source, feeds water with the final stage of routine and heats
Device is connected in series；
Additional adjustable rear final stage extraction line, will be described additional adjustable by the additional adjustable rear final stage extraction line
Final stage extraction opening, heat exchanger and the additional adjustable rear final stage feed-water heater are connected in series afterwards；
The adjustable extraction control valve being arranged on the additional adjustable rear final stage extraction line, for described additional adjustable
Drawing gas for final stage extraction line is adjusted after formula, to control the extraction pressure after the adjustable extraction control valve to control
The outlet temperature of additional adjustable rear final stage feed-water heater is stated, to meet required final feed temperature.
Preferably, the adjustable extraction control valve is arranged at the additional adjustable rear final stage extraction opening and the heat exchange
On additional adjustable rear final stage extraction line between device.
Preferably, in addition at least one water side regulating valve, water side regulating valve add adjustable rear final stage with described
Feed-water heater is connected in parallel.
Preferably, the heat exchanger can be a heat exchanger or the heat exchanger group being made up of multiple heat exchangers.
Preferably, heat exchanger group can be two and more than two heat exchangers combine or three in parallel or series
Individual and more than three heat exchangers connect composition in a manner of connecting and parallel connection is combined.
Preferably, the working medium of the heat exchanger heating is boiler hot Secondary Air or boiler heat primary air or boiler powder feeding or three
The combination of person or wherein combination.
Preferably, the heat exchanger sets up bypass, and barrier valve is set up before and after the heat exchanger, to be exchanged heat in running
Such as there is leaking at the failure in device, can switch over operation by bypass.
The adjustable feedwater of the present invention and air-supply heat regenerative system, have following advantage and effect：
1st, add adjustable rear final stage to draw gas after heat exchanger exchanges heat, its degree of superheat can obtain effective utilization, pass through heating
The heat primary air of boiler or hot Secondary Air or boiler powder feeding, by the heat to draw gas by hot blast or powder feeding, are carried into
Boiler, the thermal compositions of input boiler is changed, in other words, instead of part of fuel, therefore unit economy can be realized
Be substantially improved.Still further aspect, if heating heat primary air, due to the raising of heat primary air temperature, is ensuring pulverized coal conveying
On the basis of safety, the lifting of pulverized coal preparation system drying capacity and the lifting of coal dust firing effect can be achieved；Accordingly, if heating heat
Secondary Air, then due to the raising of hot Secondary Air temperature, it may be such that boiler combustion performance is further lifted.It is especially low negative in unit
When lotus runs, heat primary air, hot secondary air temperature are inherently low, and now, heat primary air temperature, hot secondary air temperature are with respect to raising amount just
Greatly, therefore, the benefit of the system at low load is relatively bigger.
2nd, additional adjustable rear final stage is drawn gas after heat exchanger after heat exchange, is further fed water to additional adjustable rear final stage
Heater supplementary heating is fed water, and comparatively, the extraction temperature after being exchanged heat through heat exchanger is low, therefore adds heat recovery steam
Amount, reduces cold source energy, improves the economy of device；In addition, pipeline material after heat exchanger and additional adjustable
The cost of final stage feed-water heater can be greatly lowered afterwards, and especially for the unit of following high parameter, this method is also solution
High parameter feed-water heater is difficult to provide outlet the problem of manufacture.
Design, concrete structure and the caused technique effect of the present invention are described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is the system schematic of specific embodiment 1 of the present invention.
Fig. 2 is the system schematic of specific embodiment 2 of the present invention.
Fig. 3 is the system schematic of specific embodiment 3 of the present invention.
Fig. 4 is the system schematic of specific embodiment 4 of the present invention.
Fig. 5 is the system schematic of specific embodiment 5 of the present invention.
Fig. 6 is the system schematic of specific embodiment 6 of the present invention.
Fig. 7 is the system schematic of specific embodiment 7 of the present invention.
Fig. 8 is the system schematic of specific embodiment 8 of the present invention.
Wherein, 0- adds adjustable rear final stage extraction opening；Final stage extraction opening conventional 1-；2- high pressure cylinders enter vapour；The other routines of 3-
System；4- high pressure cylinders；5- finally feeds water；6- water side regulating valve；Final stage extraction line conventional 10-；Final stage feedwater conventional 11-
Heater；01- adds adjustable rear final stage extraction control valve；02- adds adjustable rear final stage extraction line；03、03’、03’
'-heat exchanger；04th, 04 ', 04 ' '-heat exchanger is heated working medium passage；05- adds adjustable rear final stage feed-water heater.
Embodiment
Embodiment 1
Fig. 1 is the system schematic of the specific embodiment of the invention 1, and the present embodiment draws gas 10 in the final stage extraction opening 1 of routine, final stage
And on the basis of final stage feed-water heater 11, be additionally arranged on high pressure cylinder 4 it is additional it is adjustable after final stage extraction opening 0, additional adjustable
Final stage extraction line 02, additional adjustable final stage feed-water heater 05 afterwards, additional adjustable changing on final stage extraction line afterwards afterwards
Hot device 03 and additional adjustable rear final stage extraction control valve 01.
Additional adjustable rear final stage feed-water heater 05 passes through additional adjustable rear final stage extraction line 02 and heat exchanger 03
And the additional adjustable rear final stage extraction opening 0 on high pressure cylinder 4 is connected, and connected with the final stage feed-water heater 11 of routine.Attached
Add and additional adjustable rear final stage extraction control valve 01 is provided with adjustable rear final stage extraction line 02, for additional adjustable
Drawing gas for final stage extraction line 02 is adjusted afterwards, by control it is additional it is adjustable after pressure after final stage extraction control valve 01 come
Control it is additional it is adjustable after the outlet of final stage feed-water heater 05 feed temperature, heat exchanger 03 can be multiple heat exchangers, Duo Gehuan
Can be serial or parallel connection between hot device, heat exchanger 03 is drawn gas as thermal source with final stage after additional, heating boiler air-supply or/given with boiler
Powder, boiler air-supply is heat primary air or hot Secondary Air.
With the example of certain power plant 1000MW units come to the present invention control method be described in detail, wherein steam turbine is
Ultra supercritical single shaft, single reheat, the exhaust condensing turbine of four cylinder four.
For example, the additional adjustable rear final stage extraction opening set up is in unit declared working condition（1000WM）Under parameter of drawing gas be
15.71MPa/512℃.With the reduction of unit load, by adjusting additional adjustable rear final stage extraction control valve, control enters
It is additional it is adjustable after final stage feed-water heater pressure in 8.5 MPa or so, to maintain final feed temperature at 300 DEG C or so,
Until unit load is low to a certain extent, to 50% load and it is following when, due to the additional adjustable final stage extraction pressure afterwards set up
As unit sliding pressure operation is less than 8.5MPa in itself, therefore it can will add adjustable rear final stage extraction control valve standard-sized sheet.
The mistake drawn gas due to being additionally arranged heat exchanger with heating boiler air-supply or boiler powder feeding, additional adjustable rear final stage
Temperature can be obtained and effectively utilized, and the temperature after heat exchanger can be down to 360 DEG C or so, then enter back into additional adjustable rear end
Level feed-water heater further heats feedwater.So not only there are all advantages of adjustable feed water heat regenerative, at the same time,
The throttle (steam) temperature of additional adjustable rear final stage feed-water heater is reduced, its cost of investment can obtain certain reduction, in addition, drawing gas
Heat blown by heating boiler or boiler is sent into boiler powder feeding indirectly, instead of the fuel of part boiler, and make
The burning condition for obtaining boiler is effectively improved, and is greatly improved unit economy.
In the present embodiment, heat exchanger can also set up bypass, and barrier valve is set up before and after heat exchanger, to be exchanged heat in running
Such as there is leaking at the failure in device, can switch over operation by bypass.
The present invention at part load, especially under underload, is remarkably improved the economy of unit, average through conversion
Unit coal consumption about 1.5g/kWh can be reduced.
Embodiment 2
Fig. 2 is the system schematic of the specific embodiment of the invention 2, and the present embodiment draws gas 10 in the final stage extraction opening 1 of routine, final stage
And on the basis of final stage feed-water heater 11, be additionally arranged on high pressure cylinder 4 it is additional it is adjustable after final stage extraction opening 0, additional adjustable
Final stage extraction line 02, additional adjustable rear final stage feed-water heater 05, water side regulating valve 6, additional adjustable rear final stage are taken out afterwards
Heat exchanger 03 and additional adjustable rear final stage extraction control valve 01 on steam pipe road.
Additional adjustable rear final stage feed-water heater 05 passes through additional adjustable rear final stage extraction line 02 and heat exchanger 03
And the additional adjustable rear final stage extraction opening 0 on high pressure cylinder 4 is connected, and connected with the final stage feed-water heater 11 of routine.Attached
Add and additional adjustable rear final stage extraction control valve 01 is provided with adjustable rear final stage extraction line 02, for additional adjustable
Drawing gas for final stage extraction line 02 is adjusted afterwards, by control it is additional it is adjustable after pressure after final stage extraction control valve 01 come
The feed temperature of the additional adjustable rear outlet of final stage feed-water heater 05 of control, the outlet of conventional final stage feed-water heater 11 is given
A water part by water side regulating valve 6, a part by it is additional it is adjustable after final stage feed-water heater 05 further heating, so
Mixed again afterwards.
Heat exchanger 03 can be multiple heat exchangers, can be serial or parallel connection between multiple heat exchangers, after heat exchanger 03 is to add
Final stage is drawn gas as thermal source, and heating boiler air-supply or boiler powder feeding, it is heat primary air or hot Secondary Air that boiler, which is blown,.
The present embodiment and the main distinction of embodiment 1 are, are additionally arranged water side regulating valve, therefore, add adjustable rear end
Level feed-water heater 05 can be designed to portion capacity as needed, therefore the cost of additional adjustable rear final stage feed-water heater can
Relative reduction, still further aspect, for the unit of high parameter Large Copacity, if the additional adjustable rear final stage feedwater heating of full capacity
Device is manufactured into problem, then can be solved by the method.Remaining is consistent with embodiment 1, and here is omitted.
Embodiment 3
Fig. 3 is the system schematic of the specific embodiment of the invention 2, and the present embodiment draws gas 10 in the final stage extraction opening 1 of routine, final stage
And on the basis of final stage feed-water heater 11, be additionally arranged on high pressure cylinder 4 it is additional it is adjustable after final stage extraction opening 0, additional adjustable
Final stage extraction line 02, additional adjustable final stage feed-water heater 05 afterwards, additional adjustable changing on final stage extraction line afterwards afterwards
Hot device 03 and 03 ', and additional adjustable rear final stage extraction control valve 01.
Additional adjustable rear final stage feed-water heater 05 passes through additional adjustable rear final stage extraction line 02 and heat exchanger 03
And the additional adjustable rear final stage extraction opening 0 on high pressure cylinder 4 is connected, and connected with the final stage feed-water heater 11 of routine.Heat exchange
Device 03 and 03 ' is connected in parallel.It is additional it is adjustable after be provided with final stage extraction line 02 it is additional it is adjustable after final stage draw gas tune
Section valve 01, for additional adjustable rear drawing gas for final stage extraction line 02 to be adjusted, pass through and control additional adjustable rear end
Pressure after level extraction control valve 01 come control it is additional it is adjustable after the outlet of final stage feed-water heater 05 feed temperature.Heat exchanger
03 is drawn gas as thermal source with additional rear final stage, heating boiler heat primary air, and heat exchanger 03 ' then heats hot Secondary Air.
The present embodiment and the main distinction of embodiment 1 are that heat exchanger 03 and 03 ' is can to heat heat primary air and heat simultaneously
Secondary Air.Remaining is consistent with embodiment 1, and here is omitted.
Embodiment 4
Fig. 4 is the system schematic of the specific embodiment of the invention 4, and the present embodiment draws gas 10 in the final stage extraction opening 1 of routine, final stage
And on the basis of final stage feed-water heater 11, be additionally arranged on high pressure cylinder 4 it is additional it is adjustable after final stage extraction opening 0, additional adjustable
Final stage extraction line 02, additional adjustable final stage feed-water heater 05 afterwards, additional adjustable changing on final stage extraction line afterwards afterwards
Hot device 03,03 ' and 03 ' ', and additional adjustable rear final stage extraction control valve 01.
The main distinction of the present embodiment and embodiment 3 is further to be additionally arranged a heat exchanger, heat exchanger 03 ' with
03 ' ' it is connected in parallel, and is connected in series together with heat exchanger 03, the working medium of heat exchanger can be different, can be boiler heat primary air or pot
The hot Secondary Air of stove or boiler powder feeding either arbitrarily both combinations or the combination of three etc..Remaining is consistent with embodiment 3, herein
Repeat no more.
Embodiment 5
Fig. 5 is the system schematic of the specific embodiment of the invention 5, and the present embodiment draws gas 10 in the final stage extraction opening 1 of routine, final stage
And on the basis of final stage feed-water heater 11, be additionally arranged on high pressure cylinder 4 it is additional it is adjustable after final stage extraction opening 0, additional adjustable
Final stage extraction line 02, additional adjustable rear final stage feed-water heater 05, water side regulating valve 6, additional adjustable rear final stage are taken out afterwards
Heat exchanger 03,03 ' on steam pipe road, and additional adjustable rear final stage extraction control valve 01.
The present embodiment and the main distinction of embodiment 3 be heat exchanger 03 with 03 ' be not be connected in parallel but the company of series connection
Connect, the working medium of heat exchanger can be different, can be boiler heat primary air or boiler hot Secondary Air or boiler powder feeding or it is any both
Combination or the combination of three etc..Remaining is consistent with embodiment 3, and here is omitted.
Embodiment 6
Fig. 6 is the system schematic of the specific embodiment of the invention 6, and the present embodiment draws gas 10 in the final stage extraction opening 1 of routine, final stage
And on the basis of final stage feed-water heater 11, be additionally arranged on high pressure cylinder 4 it is additional it is adjustable after final stage extraction opening 0, additional adjustable
Final stage extraction line 02, additional adjustable rear final stage feed-water heater 05, water side regulating valve 6, additional adjustable rear final stage are taken out afterwards
Heat exchanger 03,03 ' on steam pipe road, and additional adjustable rear final stage extraction control valve 01.
The main distinction of the present embodiment and embodiment 5 is to be additionally arranged water side regulating valve, therefore, add it is adjustable after final stage
Feed-water heater 05 can be designed to portion capacity as needed, therefore the cost of additional adjustable rear final stage feed-water heater can phase
To reducing, still further aspect, for the unit of high parameter Large Copacity, if the additional adjustable rear final stage feed-water heater of full capacity
It is manufactured into problem, then can be solved by the method..Remaining is consistent with embodiment 5, and here is omitted.
Embodiment 7
Fig. 7 is the system schematic of the specific embodiment of the invention 7, and the present embodiment draws gas 10 in the final stage extraction opening 1 of routine, final stage
And on the basis of final stage feed-water heater 11, be additionally arranged on high pressure cylinder 4 it is additional it is adjustable after final stage extraction opening 0, additional adjustable
Final stage extraction line 02, additional adjustable final stage feed-water heater 05 afterwards, additional adjustable changing on final stage extraction line afterwards afterwards
Hot device 03,03 ' and 03 ' ', and additional adjustable rear final stage extraction control valve 01.
The present embodiment and the main distinction of embodiment 3 are to be additionally arranged a heat exchanger, heat exchanger 03 ' and heat exchanger
03 ' ' after being connected in parallel, then heat exchanger 03 is connected in series, the working medium of heat exchanger can be different, can be respectively boiler heat primary air, pot
The hot Secondary Air of stove or boiler powder feeding either arbitrarily both combinations or the combination of three.Remaining is consistent with embodiment 3, herein not
Repeat again.
Embodiment 8
Fig. 8 is the system schematic of the specific embodiment of the invention 8, and the present embodiment draws gas 10 in the final stage extraction opening 1 of routine, final stage
And on the basis of final stage feed-water heater 11, be additionally arranged on high pressure cylinder 4 it is additional it is adjustable after final stage extraction opening 0, additional adjustable
Final stage extraction line 02, additional adjustable rear final stage feed-water heater 05, water side regulating valve 6, additional adjustable rear final stage are taken out afterwards
Heat exchanger 03,03 ' and additional adjustable rear final stage extraction control valve 01 on steam pipe road.
The main distinction of the present embodiment and embodiment 7 is to be additionally arranged water side regulating valve, therefore, add it is adjustable after final stage
Feed-water heater 05 can be designed to portion capacity as needed, therefore the cost of additional adjustable rear final stage feed-water heater can phase
To reducing, still further aspect, for the unit of high parameter Large Copacity, if the additional adjustable rear final stage feed-water heater of full capacity
It is manufactured into problem, then can be solved by the method.Remaining is consistent with embodiment 7, and here is omitted.
Preferred embodiment of the invention described in detail above.It should be noted that adjustable joint of the invention is returned
Hot systems, whether water side regulating valve is configured according to water side, the position of final stage extraction control valve after adding, add adjustable rear final stage
Feed-water heater capacity is different, the difference of heat exchanger heating working medium, the number of heat exchanger, and whether barrier valve is set before and after heat exchanger
Connected mode between bypass, and various heat exchange device etc., there can be multiple combinations form.
It should be appreciated that one of ordinary skill in the art makes without creative work can according to the design of the present invention
Many modifications and variations.Therefore, all technician in the art are led on the basis of existing technology under this invention's idea
The available technical scheme of logical analysis, reasoning, or a limited experiment is crossed, all should be in the guarantor being defined in the patent claims
In the range of shield.
Claims (6)
- A kind of 1. adjustable joint backheating system, it is characterised in that：IncludingThe high pressure cylinder of steam turbine；Additional adjustable rear final stage extraction opening on the high pressure cylinder, the pressure of drawing gas of the additional adjustable rear final stage extraction opening The power non-dimmable formula final stage extraction pressure conventional higher than the high pressure cylinder；Drawn gas with the additional adjustable rear final stage of the high pressure cylinder as the heat exchanger of thermal source；Additional adjustable rear final stage feed-water heater using the steam discharge of the heat exchanger as thermal source, feeds water with the final stage of routine and heats Device is connected in series；Additional adjustable rear final stage extraction line, will be described additional adjustable by the additional adjustable rear final stage extraction line Final stage extraction opening, heat exchanger and the additional adjustable rear final stage feed-water heater are connected in series afterwards；The adjustable extraction control valve being arranged on the additional adjustable rear final stage extraction line, for described additional adjustable Drawing gas for final stage extraction line is adjusted after formula, to control the extraction pressure after the adjustable extraction control valve to control The outlet temperature of additional adjustable rear final stage feed-water heater is stated, to meet required final feed temperature.
- A kind of 2. adjustable joint backheating system according to claim 1, it is characterised in that：The adjustable extraction regulation Valve is arranged at the additional adjustable rear additional adjustable rear final stage extraction line between final stage extraction opening and the heat exchanger On.
- A kind of 3. adjustable joint backheating system as claimed in claim 1, it is characterised in that：Also include at least one water side to adjust Valve is saved, water side regulating valve is connected in parallel with the additional adjustable rear final stage feed-water heater.
- A kind of 4. adjustable joint backheating system as shown in claim 1, it is characterised in that：The heat exchanger can be one Heat exchanger or the heat exchanger group being made up of multiple heat exchangers.
- A kind of 5. adjustable joint backheating system as claimed in claim 4, it is characterised in that：Heat exchanger group can be two and More than two heat exchangers are combined in parallel or series or three and more than three heat exchangers are combined with connecting with parallel connection Mode connect composition.
- A kind of 6. adjustable joint backheating system as claimed in claim 1, it is characterised in that：The working medium of the heat exchanger heating For boiler hot Secondary Air or boiler heat primary air or boiler powder feeding or the combination of three or wherein combination.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710773972.8A CN107388229A (en) | 2017-08-31 | 2017-08-31 | A kind of adjustable joint backheating system |
| PCT/CN2018/095072 WO2019042021A1 (en) | 2017-08-31 | 2018-07-10 | Adjustable combined regeneration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710773972.8A CN107388229A (en) | 2017-08-31 | 2017-08-31 | A kind of adjustable joint backheating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107388229A true CN107388229A (en) | 2017-11-24 |
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ID=60347482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710773972.8A Pending CN107388229A (en) | 2017-08-31 | 2017-08-31 | A kind of adjustable joint backheating system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107388229A (en) |
| WO (1) | WO2019042021A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019042021A1 (en) * | 2017-08-31 | 2019-03-07 | 冯煜珵 | Adjustable combined regeneration device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6017997B2 (en) * | 1981-12-23 | 1985-05-08 | バブコツク日立株式会社 | Heat exchanger protection device |
| CN202852791U (en) * | 2011-12-30 | 2013-04-03 | 冯伟忠 | Adjustable feed water heat regenerative system for turbo generator unit |
| CN102537933B (en) * | 2011-12-30 | 2014-11-05 | 冯伟忠 | Adjustable feed water heat regenerative system for turbo generator unit |
| CN103335301B (en) * | 2013-05-17 | 2014-11-05 | 西安交通大学 | Low-load feed-water heating system of thermal power generating unit |
| CN204494368U (en) * | 2014-11-20 | 2015-07-22 | 冯伟忠 | A kind of adjustable feed water heat regenerative for thermal power plant |
| CN205878127U (en) * | 2016-07-30 | 2017-01-11 | 冯伟忠 | Feedwater heat recovery system with adjustable |
| CN106051737A (en) * | 2016-07-30 | 2016-10-26 | 冯伟忠 | Adjustable regenerative feedwater heating system and control method |
| CN107388229A (en) * | 2017-08-31 | 2017-11-24 | 冯煜珵 | A kind of adjustable joint backheating system |
| CN207298903U (en) * | 2017-08-31 | 2018-05-01 | 冯煜珵 | A kind of adjustable joint backheating system |
-
2017
- 2017-08-31 CN CN201710773972.8A patent/CN107388229A/en active Pending
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2018
- 2018-07-10 WO PCT/CN2018/095072 patent/WO2019042021A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019042021A1 (en) * | 2017-08-31 | 2019-03-07 | 冯煜珵 | Adjustable combined regeneration device |
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| WO2019042021A1 (en) | 2019-03-07 |
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