CN206972325U - A kind of small turbine vapour source automatically switches and regulating system - Google Patents
A kind of small turbine vapour source automatically switches and regulating system Download PDFInfo
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- CN206972325U CN206972325U CN201720847975.7U CN201720847975U CN206972325U CN 206972325 U CN206972325 U CN 206972325U CN 201720847975 U CN201720847975 U CN 201720847975U CN 206972325 U CN206972325 U CN 206972325U
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Abstract
The utility model discloses a kind of automatic switchover of small turbine vapour source and regulating system, including four sections of steam bleeding system branch roads, auxiliary vapour header system branch, small turbine, outside vapour source system and control system；Four sections of steam bleeding system branch roads are connected with after auxiliary vapour header system branch parallel connection by pipeline with small turbine；The second electrically operated gate and the second pitch are additionally provided with the pipeline connected between small turbine and four sections of steam bleeding system branch roads；Auxiliary vapour header system branch includes auxiliary vapour header system, and auxiliary vapour header system is connected to the 3rd electrically operated gate by non-return flap two, and the 3rd electrically operated gate is connected to the second electrically operated gate；Four sections of steam bleeding system branch roads include four sections of steam bleeding systems, and four sections of steam bleeding systems are connected to the first electrically operated gate by non-return flap one；The 3rd pitch is additionally provided between 3rd electrically operated gate and the second electrically operated gate, the first pitch is provided between the first electrically operated gate and the second electrically operated gate.The utility model is realized that vapour source automatically switches under unit difference operating mode and adjusted with small steam turbine stabilization of speed.
Description
Technical field
A kind of thermal power plant's steam feed pump field is the utility model is related to, specifically a kind of small turbine vapour source automatically switches
And regulating system.
Background technology
With the increasingly fierceness of Electricity Market Competition, higher requirement is proposed to Energy-saving for Thermal Power Units consumption reduction.Using small
The mode of Steam Turbine Driven feed pump can not only substantially reduce station service power consumption rate, and improve primary energy ratio.Generally need
To be that small turbine configures qualified vapour source to control the rotating speed of small turbine, and then adjust the rotating speed of steam feed pump, reach
Purpose to boiler water filling.
With the development that thermal power generation unit depth peak regulation works, frequently changing unit load already turns into normality, especially
It is in underrun operating mode, how ensures that unit safety stable operation is particularly significant.It is also inevitable in face of the operating condition of complexity
It is required that the switching of small turbine vapour source reaches strict requirements with regulation performance.At present, the small steam turbine vapour source of domestic fired power generating unit is general
Drawn gas using cold reheated steam section, four sections draw gas and three kinds of vapour source steam supplies of Auxiliary Steam.The vapour source of auxiliary header comes from
Adjacent unit, four sections draw gas and drawn gas with cold hot arc again, the unit starting stage, for the unit of no electrically driven feed pump, by
The requirement of small turbine vapour source can not still be met in quantity of steam caused by boiler body and steam parameter, aid in the vapour source of header
From in adjacent unit or arcola.It is main using four sections of driving small turbines that draw gas after unit normal operation.When four sections of unit
When extraction pressure reduces, vapour source switches to auxiliary header steam supply.
The existing switching of small turbine vapour source and regulation, only the experience manual switching and regulation with personnel.When in order to keep
Unit load and when closing four sections and drawing gas, vapour source is generally switched into Auxiliary Steam, to ensure the normally upper water of boiler.But
It is that only armrest moves switching mode, switching time length, hysteresis quality is big, and small turbine rotating speed control process overshoot is big.If could not and
When switch to another way vapour source or disturbed when coming into operation it is excessive, feed pump capacity deficiency, directly threaten unit safety stable operation.
Once the full fuel of boiler loses (MFT), unit must be just restarted, not only needs to consume substantial amounts of fossil energy, and damage
Valuable generated energy is lost, causes huge direct economic loss.
Utility model content
The purpose of this utility model is that provide one kind realizes the automatic no-harass switch of vapour source and small steam turbine under different operating modes
The small turbine vapour source adjusted to stabilization of speed automatically switches and regulating system.
To achieve the above object, the utility model provides following technical scheme：
A kind of small turbine vapour source automatically switches and regulating system, including four sections of steam bleeding system branch roads, auxiliary vapour header system
Branch road, small turbine, cold reheating section steam bleeding system, outside vapour source system and control system；Four sections of steam bleeding system branch roads with
It is connected after auxiliary vapour header system branch parallel connection by pipeline with small turbine；The small turbine and four sections of steam bleeding system branch roads it
Between be additionally provided with the second electrically operated gate and the second pitch on the pipeline that connects, second electrically operated gate and the second pitch are connected to control
System processed；The small turbine is connected to steam feed pump；The auxiliary vapour header system branch includes auxiliary vapour header system, check
The two and the 3rd electrically operated gate of door；The auxiliary vapour header system is connected to non-return flap two, and non-return flap two is connected to the 3rd electrically operated gate, and the 3rd
Electrically operated gate is connected to the second electrically operated gate；Four sections of steam bleeding system branch roads include four sections of steam bleeding systems, the electricity of non-return flap one and first
Dynamic door, four sections of steam bleeding systems are connected to non-return flap one, and non-return flap one is connected to the first electrically operated gate, the 3rd electrically operated gate and
First electrically operated gate is connected to control system；The auxiliary vapour header system is connected to the 4th electrically operated gate, and the 4th electrically operated gate is connected to
Four sections of steam bleeding systems；The cold reheating steam bleeding system is connected to auxiliary vapour header system by the 5th electrically operated gate；The outside vapour source
System is connected to auxiliary vapour header system by the 6th electrically operated gate, the 4th electrically operated gate, the 5th electronic and the 6th electrically operated gate is equal
It is connected to control system；The 3rd pitch, first electrically operated gate are additionally provided between 3rd electrically operated gate and the second electrically operated gate
And second be additionally provided with the first pitch between electrically operated gate, the first pitch and the 3rd pitch are connected to control system.
As further program of the utility model：It is additionally provided with the auxiliary vapour header system branch for maintaining auxiliary vapour
The draining valve of the hot standby state of steam line on header system branch, the draining valve be arranged on the electrically operated gate of non-return flap two and the 3rd it
Between.
Compared with prior art, the beneficial effects of the utility model are：
1) the utility model is realized under the operating modes such as Unit Commitment stage, underrun, RUNBACK and depth peak regulation
Adjust to the automatic no-harass switch of vapour source and small steam turbine stabilization of speed.
2) for the utility model without long-time heating coil in handoff procedure, switching time is short, can switch in time standby
Or supplement vapour source.
3) pitch is set in each road vapour source pipeline of the utility model, avoids steam inlet condition fluctuation in vapour source handoff procedure from leading greatly
Cause the phenomenon that small turbine vibration is big, boiler feedwater is abnormal.
Brief description of the drawings
Fig. 1 is the structural representation that the present embodiment small turbine vapour source automatically switches with regulating system.
In figure：Tetra- sections of steam bleeding systems of 1-, 2- non-return flaps one, the electrically operated gates of 3- first, the pitch of 4- first, the electrically operated gates of 5- second,
The pitch of 6- second, 7- non-return flaps two, the electrically operated gates of 8- the 3rd, the pitch of 9- the 3rd, the electrically operated gates of 10- the 4th, the electrically operated gates of 11- the 5th, 12-
Auxiliary vapour header system, the cold reheating section steam bleeding systems of 13-, 14- draining valves, 15- small turbines, 16- steam feed pumps, outside 17-
Vapour source system, the electrically operated gates of 18- the 6th.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Referring to Fig. 1, a kind of small turbine vapour source automatically switches and regulating system, including it is four sections of steam bleeding system branch roads, auxiliary
Vapour header system branch, small turbine 15, cold reheating section steam bleeding system 13 and outside vapour source system 17；
Four sections of steam bleeding system branch roads are connected with after auxiliary vapour header system branch parallel connection by pipeline with small turbine 15,
Four sections of steam bleeding system branch roads can be the steam supply of small turbine 15 with auxiliary vapour header system branch；The small turbine 15 and four
The second electrically operated gate 5 and the second pitch 6, second electrically operated gate 5 are additionally provided with the pipeline connected between section steam bleeding system branch road
Control system is connected to the second pitch 6, the closing of the second pitch 6 is controlled so as to the flux of control pipeline by control system
Size controls the second electrically operated gate 5 to turn off or on whole pipe to adjust the size of the evaporation capacity for engine of pipeline, by control system
Road；The small turbine 15 is connected to steam feed pump 16；
The auxiliary vapour header system branch includes auxiliary vapour header system 12, non-return flap 27, the 3rd electrically operated gate 8 and the 3rd and adjusted
Door 9；The auxiliary vapour header system 12 is connected to non-return flap 27, and non-return flap 27 is connected to the 3rd electrically operated gate 8, the 3rd electrically operated gate 8
The 3rd pitch 9 is connected to, the 3rd pitch 9 and the 3rd electrically operated gate 8 are connected to control system；
Four sections of steam bleeding system branch roads include four sections of steam bleeding systems 1, non-return flap 1, the first electrically operated gate 3 and the first pitch
4, four sections of steam bleeding systems 1 are connected to non-return flap 1, and non-return flap 1 is connected to the first electrically operated gate 3, and the first electrically operated gate 3 connects
To the first pitch 4；The electrically operated gate 3 of first pitch 4 and first is connected to control system；
The auxiliary vapour header system 12 is connected to the 4th electrically operated gate 10, and the 4th electrically operated gate 10 is connected to four sections of steam bleeding systems 1；
Draining valve 14 is additionally provided with the auxiliary vapour header system branch, it is electronic that the draining valve 14 is arranged on non-return flap 27 and the 3rd
Between door 8, draining valve 14 is used to maintain the hot standby state of steam line on auxiliary vapour header system branch, it is therefore an objective to is cut automatically for vapour source
Change and reduce the time, the rapidity of vapour source switching, and then ensure unit safety stable operation.
The cold reheating steam bleeding system 13 is connected to auxiliary vapour header system 12 by the 5th electrically operated gate 11；The outside vapour source
System 17 is connected to auxiliary vapour header system 12 by the 6th electrically operated gate 18, the 4th electrically operated gate 10, the 5th electronic 11 and
Six electrically operated gates 18 are connected to control system.
Operation principle of the present utility model is：The utility model is by four sections of steam bleeding system branch roads and auxiliary vapour header system
The first pitch 4 and the 3rd pitch 9 are installed respectively on system branch road, opening for the first pitch 4 and the 3rd pitch 9 is controlled by control system
Open so as to control the closing unlatching situation of different branch to be applicable different steam supply ways；
When unit starting, the vapour source of small turbine 15 comes from outside vapour source 17, mostly come from adjacent unit or
The steam of starting trouble.Non-return flap 27, the 3rd electrically operated gate 8 and the 3rd pitch 9 are now opened, outside vapour source 17 reaches electrically operated gate 5
Before, then open the pitch 6 of electrically operated gate 5 and second successively and give the steam supply of small turbine 15, driving small turbine 15 rotates；
After unit reaches 40% rated load, four sections of steam bleeding systems 1 meet the requirement of vapour source pressure, now need to pass through
Four sections of steam bleeding system branch roads carry out steam supply, and after opening non-return flap 1, the first electrically operated gate 3 successively, small vapour is set by control system
The rotating speed of turbine 15 is constant, then closes the 3rd pitch 9 with given pace, while gradually opens the first pitch 4, until low pressure the
Three pitch 9 completely close.Because header vapour source parameter and four sections of parameter similars that draw gas are aided in, therefore the intimate unperturbed of handoff procedure.
When unit load reaches 40% rated load, by four sections of steam supplies of steam bleeding system 1, the first pitch 4 controls small steamer
The rotating speed of machine 15；4th electrically operated gate 10 and the 5th electrically operated gate 11 are set, for auxiliary 12 supply portion of header, four sections of steam bleeding systems 1 and cold
Hot arc draws gas 13 again, ensures the abundance of the auxiliary vapour source of header 12, enhances the alternative of vapour source switching.In unit normal operation
When, non-return flap 27 and draining valve 14 are opened, heating coil, heating coil are carried out to the steam line before the auxiliary electrically operated gate 8 of header 12 to the 3rd
Draining valve 14 is closed after end, so as to maintain the hot standby state of steam line；The hot standby state of pipeline is designed as vapour source automatic switchover reduction
Time, the rapidity of vapour source switching, and then ensure unit safety stable operation.
When unit feed pump is higher by demand, four sections of steam bleeding systems 1 can not meet the feedwater flow need of unit feed pump
Ask, now progressively open the auxiliary vapour source of header 12.Because the first pitch 4 is persistently opened, pressure rapid decrease before the first pitch 4,
When pressure is less than certain value, the 3rd pitch 9 is now opened, auxiliary header 12 vapour source input, maintains feed pump high output operating mode；
Because the 3rd pitch 9 and the first pitch 4 have certain pitch degree of overlapping, 9 certain aperture of the 3rd pitch is opened in advance, can be prevented not
Mixed with vapour source during adjusting, the phenomenon that the 3rd pitch 9, the first pitch 4 frequently vibrate.The vapour source of header 12 is aided in input
When,, immediately can be with without considering heating coil because the steam line before the auxiliary vapour source of header 12 to the 3rd pitch 9 is in hot standby state
The 3rd pitch 9 is opened, supplements vapour source.Instructed according to the traffic demand of feed pump, the pitch 9 of reasonable adjusting the 3rd, the and of the first pitch 4
The aperture of second pitch 6, avoid the small turbine 15 caused by the flow mutation of pitch overlapping interval of small turbine 15
Body vibrates big peril.
When performing low-load running of machine set, the unit of depth peak regulation is particularly participated in, in order to maintain unit running on the lower load
Stable operation, closes non-return flap 1, the first electrically operated gate 3 and the first pitch 4 of four sections of vapour sources of steam bleeding system 1, while opens check
The 27, the 3rd electrically operated gate 8 of door, and the aperture of the 3rd pitch 9 is automatically controlled according to the pressure value before the first pitch 4, realize that unperturbed is cut
Change vapour source.
When four sections of steam bleeding systems 1 lose or during RUNBACK operating modes suddenly, the pressure before the first pitch 4 drastically declines, and works as pressure
When power is down to certain value, the 3rd electrically operated gate 8 and the 3rd pitch 9 are opened, need not because the road steam line is in hot standby state
Prolonged heating coil can be switched fast the auxiliary vapour source of header 12, maintain the normal with vapour of small turbine 15；Because aid in header
The pressure of 12 vapour sources is suitable with the vapour source pressure of four sections of steam bleeding systems 1, and aids in the vapour source of header 12 through warm before and after steam line
Difference is small, thus between four sections of steam bleeding systems 1 and the auxiliary vapour source of header 12 can no-harass switch, ensure quick extensive after unit chaser
It is multiple.
In summary, the utility model provides a kind of small turbine vapour source automatic switchover and regulating system, disclosure satisfy that
Rapidly automatic switchover under the operating modes such as Unit Commitment stage, RUNBACK operating modes, underrun operating mode and feed pump high output
Stably adjust, handoff procedure feed pump capacity undisturbed, each pitch does not vibrate, small turbine body temperature it is stable and
Vibrate low.Therefore this is run safe and stable, economical using new guarantee unit flexibility.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
Formula, can also be on the premise of this patent objective not be departed from one skilled in the relevant art's possessed knowledge
Make a variety of changes.
Claims (2)
1. a kind of small turbine vapour source automatically switches and regulating system, including four sections of steam bleeding system branch roads, auxiliary vapour header system branch
Road, small turbine (15), cold reheating section steam bleeding system (13), outside vapour source system (17) and control system；Described four sections are drawn gas
System branch is connected with after auxiliary vapour header system branch parallel connection by pipeline with small turbine (15)；The small turbine (15) with
The second electrically operated gate (5) and the second pitch (6), second electricity are additionally provided with the pipeline connected between four sections of steam bleeding system branch roads
Dynamic door (5) and the second pitch (6) are connected to control system；The small turbine (15) is connected to steam feed pump (16)；Institute
Stating auxiliary vapour header system branch includes auxiliary vapour header system (12), non-return flap two (7) and the 3rd electrically operated gate (8)；The auxiliary vapour connection
Case system (12) is connected to non-return flap two (7), and non-return flap two (7) is connected to the 3rd electrically operated gate (8), the connection of the 3rd electrically operated gate (8)
To the second electrically operated gate (5)；It is electronic that four sections of steam bleeding system branch roads include four sections of steam bleeding systems (1), non-return flap one (2) and first
Door (3), four sections of steam bleeding systems (1) are connected to non-return flap one (2), and non-return flap one (2) is connected to the first electrically operated gate (3), institute
State the 3rd electrically operated gate (8) and the first electrically operated gate (3) is connected to control system；The auxiliary vapour header system (12) is connected to the 4th
Electrically operated gate (10), the 4th electrically operated gate (10) are connected to four sections of steam bleeding systems (1)；The cold reheating steam bleeding system (13) passes through the 5th
Electrically operated gate (11) is connected to auxiliary vapour header system (12)；The outside vapour source system (17) is connected to by the 6th electrically operated gate (18)
Auxiliary vapour header system (12), the 4th electrically operated gate (10), the 5th electrically operated gate (11) and the 6th electrically operated gate (18) are connected to control
System processed；Characterized in that, the 3rd pitch (9), institute are additionally provided between the 3rd electrically operated gate (8) and the second electrically operated gate (5)
State and the first pitch (4) is additionally provided between the first electrically operated gate (3) and the second electrically operated gate (5), the first pitch (4) and the 3rd pitch
(9) it is connected to control system.
2. small turbine vapour source according to claim 1 automatically switches and regulating system, it is characterised in that the auxiliary vapour connection
The draining valve (14) for maintaining the hot standby state of steam line on auxiliary vapour header system branch, institute are additionally provided with case system branch
Draining valve (14) is stated to be arranged between non-return flap two (7) and the 3rd electrically operated gate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720847975.7U CN206972325U (en) | 2017-07-13 | 2017-07-13 | A kind of small turbine vapour source automatically switches and regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720847975.7U CN206972325U (en) | 2017-07-13 | 2017-07-13 | A kind of small turbine vapour source automatically switches and regulating system |
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| Publication Number | Publication Date |
|---|---|
| CN206972325U true CN206972325U (en) | 2018-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720847975.7U Expired - Fee Related CN206972325U (en) | 2017-07-13 | 2017-07-13 | A kind of small turbine vapour source automatically switches and regulating system |
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| CN (1) | CN206972325U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296408A (en) * | 2018-09-18 | 2019-02-01 | 国电南京电力试验研究有限公司 | One kind giving mercury vapour turbine vapour source method for handover control |
| CN110986024A (en) * | 2019-11-04 | 2020-04-10 | 中国能源建设集团华东电力试验研究院有限公司 | 660MW supercritical unit water supply system steam source switching control device and control method |
| CN110985137A (en) * | 2019-11-04 | 2020-04-10 | 中国能源建设集团华东电力试验研究院有限公司 | 660MW supercritical unit water supply system steam flow balance control device and control method |
| CN111561692A (en) * | 2020-05-11 | 2020-08-21 | 国家能源集团谏壁发电厂 | System for correcting reheater steam temperature deviation of tower furnace and deviation correcting method thereof |
| CN112943387A (en) * | 2021-04-02 | 2021-06-11 | 浙江浙能兰溪发电有限责任公司 | Steam source control method and steam source control device |
| CN113819400A (en) * | 2021-07-30 | 2021-12-21 | 西安西热节能技术有限公司 | Multi-source integrated automatic switching combined steam supply system and method |
-
2017
- 2017-07-13 CN CN201720847975.7U patent/CN206972325U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296408A (en) * | 2018-09-18 | 2019-02-01 | 国电南京电力试验研究有限公司 | One kind giving mercury vapour turbine vapour source method for handover control |
| CN109296408B (en) * | 2018-09-18 | 2019-08-06 | 国电南京电力试验研究有限公司 | One kind giving mercury vapour turbine vapour source method for handover control |
| CN110986024A (en) * | 2019-11-04 | 2020-04-10 | 中国能源建设集团华东电力试验研究院有限公司 | 660MW supercritical unit water supply system steam source switching control device and control method |
| CN110985137A (en) * | 2019-11-04 | 2020-04-10 | 中国能源建设集团华东电力试验研究院有限公司 | 660MW supercritical unit water supply system steam flow balance control device and control method |
| CN111561692A (en) * | 2020-05-11 | 2020-08-21 | 国家能源集团谏壁发电厂 | System for correcting reheater steam temperature deviation of tower furnace and deviation correcting method thereof |
| CN112943387A (en) * | 2021-04-02 | 2021-06-11 | 浙江浙能兰溪发电有限责任公司 | Steam source control method and steam source control device |
| CN113819400A (en) * | 2021-07-30 | 2021-12-21 | 西安西热节能技术有限公司 | Multi-source integrated automatic switching combined steam supply system and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180206 Termination date: 20180713 |