CN206145658U - High -efficient heat recovery system - Google Patents
High -efficient heat recovery system Download PDFInfo
- Publication number
- CN206145658U CN206145658U CN201620999976.9U CN201620999976U CN206145658U CN 206145658 U CN206145658 U CN 206145658U CN 201620999976 U CN201620999976 U CN 201620999976U CN 206145658 U CN206145658 U CN 206145658U
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- steam
- steam turbine
- heater
- steam inlet
- extraction opening
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Abstract
The application discloses a high -efficient heat recovery system, including steam turbine and a plurality of series connection and/or parallelly connected heater, a plurality of series connection and/or parallelly connected heater are equipped with a steam inlet, the gas vent of steam turbine pass through the steam conduit with steam inlet intercommunication still is equipped with high pressure feed water heater and heat return pipe way, has offered steam extraction port on the steam turbine, and this steam extraction port passes through heat return pipe way and high pressure feed water heater's steam inlet intercommunication, and is equipped with the diverter valve on the heat return pipe way, still be equipped with the 2nd steam inlet who converges with a steam inlet on a plurality of series connection and/or the parallelly connected heater, high pressure feed water heater's the 2nd steam inlet of steam outlet intercommunication. This heat recovery system can improve feed water temperature on the one hand, and on the other hand can reduce steam turbine heat rate and power supply coal consumption.
Description
Technical field
This utility model belongs to be used for heating, a kind of such as industrial, civilian field, and in particular to efficient heat regenerative system.
Background technology
The process of denitrification, antipollution importance is gone to ask as worldwide in combustion product gases
Inscribe and be shrilly contemplated.The technique for comparing main flow in the world is divided into：SCR and SNCR.The denitration of above two technique is former
It is nitrogen and other free of contamination compounds by conversion of nitrogen oxides by carbamide or ammonia that reason is.
Carbamide or ammonia are flashed to ammonia typically by hot water, then with reaction of nitrogen oxides, side common at present
Method is fed water by the steam heating that boiler or steam turbine produce, and the hot water after being then heated is used for the steaming of carbamide or ammonia
Send out, find still there is problems with use：1st, feed temperature is relatively low, affects denitration efficiency；2nd, produced using steam turbine
Steam when, thermal loss of steam turbine is too high, and net coal consumption rate is high.
Utility model content
The purpose of this utility model is to provide a kind of efficient heat regenerative system, and on the one hand the heat regenerative system can improve feedwater temperature
Degree, on the other hand can reduce thermal loss of steam turbine and net coal consumption rate.
To reach above-mentioned purpose, base case of the present utility model is as follows：
A kind of efficient heat regenerative system, including the heater of steam turbine and multiple series connection and/or parallel connection, multiple series connection and/or
Heater in parallel is provided with the first steam inlet, and the air vent of the steam turbine passes through jet chimney and first steam inlet
Connection, is additionally provided with high-pressure heater and backheat pipeline, extraction opening is offered on steam turbine, and the extraction opening is by backheat pipeline and height
The steam inlet connection of pressure heater, and backheat pipeline is provided with switching valve；Also set on the heater of multiple series connection and/or parallel connection
There are the second steam inlet converged with the first steam inlet, the second steam inlet of steam (vapor) outlet connection of high-pressure heater.
The principle of this programme：In this programme, the steam that the air vent of steam turbine is discharged is steamed into first by jet chimney
In vapour entrance, increase newly on steam turbine in addition and offer extraction opening, the steam in the extraction opening is entered after entering high-pressure heater
Second steam inlet, and converge with the first steam inlet, the steam after converging is the heating feedwater heat exchange in heater, is heated
Hot water afterwards is entered in denitrating system.
The advantage of this programme is：In this programme, high-pressure heater is dexterously increased, and open up on steam turbine and draw gas
Mouthful, extraction opening Jing backheat pipelines enter high-pressure heater, find after said structure is arranged, and many of Jing connects and/or in parallel
Heater process after feed temperature improve about 20 DEG C, and thermal loss of steam turbine reduce about 30kJ/kWh, convert into net coal consumption rate
Reduce about 1.2g/kWh.
Prioritization scheme 1, the further optimization to base case, the extraction opening are located at the end of steam turbine acting.It is practical
New people has found in use, when extraction opening is arranged in the manner described above, can improve final feed temperature, so as to improve denitration
Efficiency.
Prioritization scheme 2, to base case, the further optimization of 1 any one of prioritization scheme, the high pressure cylinder of the steam turbine is
Reverse-flow type, and high pressure cylinder both sides are equipped with least 6 grades actings.The steam turbine of above-mentioned configuration, not only can guarantee that extraction opening is enough
Installing space, and the vapor (steam) temperature that Jing extraction openings are discharged is of a relatively high, and feedwater temperature can be further improved in high-pressure heater
Degree.
Prioritization scheme 3, to base case, the further optimization of 1 any one of prioritization scheme, the high pressure cylinder of the steam turbine is
Uniflow type, the extraction opening are located on the outer shell of hp outer cylinder.The high pressure cylinder space of uniflow type is narrower, extraction opening cloth
Put and just open up above outer shell.
Description of the drawings
Fig. 1 is a kind of structural representation of efficient heat regenerative system embodiment of this utility model；
Fig. 2 is the structural representation of steam turbine part in a kind of efficient heat regenerative system embodiment of this utility model.
Specific embodiment
This utility model is described in further detail below by specific embodiment：
Reference in Figure of description includes：Steam turbine 1, high-pressure heater 2, heater 3, the first steam inlet 4,
Jet chimney 5, backheat pipeline 6, switching valve 7, the second steam inlet 8, extraction opening 9.
Embodiment 1
The present embodiment is substantially as shown in Figures 1 and 2：The present embodiment provides a kind of efficient heat regenerative system, including steam turbine 1
With the heater 3 of three series connection, on first heater 3 of the heater 3 of three series connection, there are the first steam inlet 4, steam turbine 1
Air vent connected with the first steam inlet 4 by jet chimney 5, the present embodiment also has additional high-pressure heater 2 and product heat cal rod
Road 6, offers extraction opening 9 on steam turbine 1, the extraction opening 9 is connected with the steam inlet of high-pressure heater 2 by backheat pipeline 6,
And switching valve 7 is installed on backheat pipeline 6, extraction opening 9 is located at the end of the acting of steam turbine 1.Utility model people sent out in use
It is existing, when extraction opening 9 is arranged in the manner described above, final feed temperature can be improved, so as to improve denitration efficiency；Three series connection
The second steam inlet 8 converged with the first steam inlet 4, high-pressure heater are further opened with first heater 3 of heater 3
2 the second steam inlet of steam (vapor) outlet 8 connects.
In the present embodiment, the amount of drawing gas of high-pressure heater 2 is 80t/h.The amount of drawing gas of high-pressure heater 2 is controlled in above-mentioned model
When enclosing, the temperature control of 2 pairs of feedwater of high-pressure heater is can guarantee that, and the efficiency of heating surface of other heaters 3 can be improved.
In the present embodiment, when the power of steam turbine 1 is more than 500MW, high-pressure heater 2 cuts off.Arrange on steam turbine 1
After extraction opening 9, the process of drawing gas can form thrust to each grade blade in 1 high pressure cylinder of steam turbine, find in use, steam turbine
When 1 power is more than 500MW, each grade blade can be born compared with high thrust, so high-pressure heater 2 is cut off, it is ensured that steam turbine 1
It is normal to run.
When high-pressure heater 2 puts into and cuts off, the speed of switching is less than 0.5t/min.Because the input of heater 3 and
During excision, than larger, the input of high-pressure heater 2 and chopping speed are controlled in above-mentioned model for the thrust variation of 1 unit of steam turbine
When enclosing interior, handoff procedure is relatively slow, can avoid the axial float of rotor.
Embodiment 2
In place of the present embodiment and the difference of embodiment 1 it is：The high pressure cylinder of steam turbine 1 is reverse-flow type, and high pressure cylinder both sides
It is equipped with least 6 grades actings.The steam turbine 1 of above-mentioned configuration, not only can guarantee that the enough installing spaces of extraction opening 9, and Jing takes out
The vapor (steam) temperature that steam ports 9 is discharged is of a relatively high, and feed temperature can be further improved in high-pressure heater 2.
Specific workflow：
Illustrate by taking embodiment 2 as an example below, in the scheme of embodiment 2, the steam that the air vent of steam turbine 1 is discharged leads to
Jet chimney 5 is crossed in the first steam inlet 4, is increased newly on steam turbine 1 in addition and is offered extraction opening 9, steam Jing steam turbines 1
After the acting of 6 grades of head side, latter 6 grades of 180 ° of entrance of revolution continue acting, finally flow out from extraction opening 9, the steam in the extraction opening 9
The second steam inlet 8 is entered into after high-pressure heater 2, and is converged with the first steam inlet 4, the steam after converging is heater
Heating feedwater heat exchange in 3, the hot water after being heated are entered in denitrating system.
The present embodiment dexterously increased high-pressure heater 2, and extraction opening 9 is opened up on steam turbine 1,9 Jing of extraction opening
Backheat pipeline 6 adds into high-pressure heater 2, the discovery after said structure is arranged, Jing high-pressure heaters 2 and three series connection
Feed temperature after the process of hot device 3 improves about 20 DEG C, and 1 heat consumption of steam turbine reduces about 30kJ/kWh, converts into net coal consumption rate drop
Low about 1.2g/kWh.
Above-described is only embodiment of the present utility model, and in scheme, the general knowledge here such as known characteristic is excessively retouched
State.It should be pointed out that for a person skilled in the art, without departing from the concept of the premise utility, can also make
Go out some deformations and improvement, these should also be considered as protection domain of the present utility model, these are all without impact this utility model
The effect and practical applicability of enforcement.This application claims protection domain should be defined by the content of its claim, explanation
Specific embodiment in book etc. records the content that can be used for explaining claim.
Claims (4)
1. a kind of efficient heat regenerative system, including the heater of steam turbine and multiple series connection and/or parallel connection, multiple series connection and/or and
The heater of connection is provided with the first steam inlet, and the air vent of the steam turbine is connected with first steam inlet by jet chimney
It is logical, it is characterised in that to be additionally provided with high-pressure heater and backheat pipeline, on steam turbine, offer extraction opening, the extraction opening passes through back
Hot channel is connected with the steam inlet of high-pressure heater, and backheat pipeline is provided with switching valve；It is multiple series connection and/or parallel connection plus
The second steam inlet converged with the first steam inlet, second steam inlet of steam (vapor) outlet of high-pressure heater are additionally provided with hot device
Connection.
2. efficient heat regenerative system according to claim 1, it is characterised in that the extraction opening is located at the end of steam turbine acting
End.
3. efficient heat regenerative system according to claim 1 and 2, it is characterised in that the high pressure cylinder of the steam turbine is backflow
Formula, and high pressure cylinder both sides are equipped with least 6 grades actings.
4. efficient heat regenerative system according to claim 1 and 2, it is characterised in that the high pressure cylinder of the steam turbine is unidirectional
Flow-type, the extraction opening are located on the outer shell of hp outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620999976.9U CN206145658U (en) | 2016-08-31 | 2016-08-31 | High -efficient heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620999976.9U CN206145658U (en) | 2016-08-31 | 2016-08-31 | High -efficient heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206145658U true CN206145658U (en) | 2017-05-03 |
Family
ID=58617868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620999976.9U Active CN206145658U (en) | 2016-08-31 | 2016-08-31 | High -efficient heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206145658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369804A (en) * | 2016-08-31 | 2017-02-01 | 中节能科技投资有限公司 | High-effect heat regenerative system |
-
2016
- 2016-08-31 CN CN201620999976.9U patent/CN206145658U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369804A (en) * | 2016-08-31 | 2017-02-01 | 中节能科技投资有限公司 | High-effect heat regenerative system |
| CN106369804B (en) * | 2016-08-31 | 2019-05-24 | 中节能科技投资有限公司 | High-effect heat regenerative system |
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