CN207122891U - A kind of gas combustion-gas vapor combined cycle unit high-pressure steam manifold stage control system - Google Patents
A kind of gas combustion-gas vapor combined cycle unit high-pressure steam manifold stage control system Download PDFInfo
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- CN207122891U CN207122891U CN201720787524.9U CN201720787524U CN207122891U CN 207122891 U CN207122891 U CN 207122891U CN 201720787524 U CN201720787524 U CN 201720787524U CN 207122891 U CN207122891 U CN 207122891U
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- flow
- water level
- transmitter
- steam
- valve
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Abstract
A kind of gas combustion-gas vapor combined cycle unit high-pressure steam manifold stage control system, the first feedwater piping are connected with one end of high-pressure feed water regulating valve, and the other end of high-pressure feed water regulating valve is connected with one end of economizer, and the economizer other end is connected with HP steam drum；Second feedwater piping is connected with cooler, and cooler is connected with flow control valve, and flow control valve is connected with HP steam drum；HP steam drum is connected with water level transmitter, and water level transmitter is connected with water level controller；Water level controller connects high-pressure feed water regulating valve by the first actuator；High-pressure feed water regulating valve is connected to flow controller by valve position transmitter；Flow controller is connected to flow control valve by the second actuator.The utility model has the advantage of：The aperture of high-pressure feed water regulating valve is linked into flow control circuit by introducing valve position transmitter and is used as feedforward, so as to ensure that feedwater flow acts on water level regulation in time.
Description
Technical field
It the utility model is related to a kind of automatic control technology field, more particularly to a kind of Gas-steam Combined Cycle
Unit high-pressure steam manifold stage control system.
Background technology
Existing control system high-pressure steam manifold stage control loop uses Three-value control.Steam water-level is controlled as controlled
Amount, high-pressure water inlet adjust valve opening as controlled quentity controlled variable.
It is to adjust valve pressure difference by using the flow of the setting of TCA cooler feedwater flows rate and waste heat boiler side that TCA flows, which adjust valve,
Come what is controlled, during steady state load, adjust valve opening instruction mainly adjusted valve by flow before and after pressure differential deltap P influenceed.Differential pressure becomes big, and valve closes
It is small, otherwise still.Adjust for opened loop control, easily influenceed by the valve linearity, regulation is inaccurate.
Steam water-level regulation is easily fluctuated：Such as when high-pressure steam manifold stage is higher, high-pressure feed water valve is inclined according to water level
Change from setting value turns down valve, equally from the TCA chilled(cooling) water return (CWR)s that high-pressure feed water comes, does not close inevitable therefore and leads in time
Flow increase is caused, water level can not be adjusted in time, so as to which the water level control for adjusting valve to feedwater again brings influence.
Utility model content
Technical problem to be solved in the utility model is the provision of a kind of guarantee feedwater flow and acts on water level in time
Regulation, so as to adjust the gas-steam combined circulating generation unit high-pressure steam manifold stage control system of water level in time.
The utility model is that solve above-mentioned technical problem by the following technical programs：A kind of Gas-steam Combined Cycle
Generating set high-pressure steam manifold stage control system, including the first feedwater piping (1), the second feedwater piping (2), HP steam drum
(100), high-pressure feed water regulating valve (3), economizer (4), cooler (5), flow control valve (6), water level transmitter (7), water level
Controller (8), the first actuator (13), the second actuator (14), flow controller (15), valve position transmitter (17)；
First feedwater piping (1), the entrance connection high-pressure feed water of the second feedwater piping (2)；The first described feedwater
Pipeline (1) is connected with one end of high-pressure feed water regulating valve (3), the other end and the economizer (4) of high-pressure feed water regulating valve (3)
One end is connected, and economizer (4) other end is connected with HP steam drum (100)；Second feedwater piping (2) is connected with cooler (5), cold
But device (5) is connected with flow control valve (6), and flow control valve (6) is connected with HP steam drum (100)；HP steam drum (100) with
Water level transmitter (7) is connected, and water level transmitter (7) is connected with water level controller (8)；Water level controller (8) performs by first
Device (13) connection high-pressure feed water regulating valve (3)；High-pressure feed water regulating valve (3) is connected to flow control by valve position transmitter (17)
Device (15)；Flow controller (15) is connected to flow control valve (6) by the second actuator (14).
As the technical scheme of optimization, the gas-steam combined circulating generation unit high-pressure steam manifold stage control system is also
Including jet chimney (9) and first flow transmitter (10), the output end of jet chimney (9) input and HP steam drum (100)
It is connected, jet chimney (9) is connected with first flow transmitter (10), first flow transmitter (10) and water level controller (8) phase
Even, water level controller (8) is connected to the first actuator (13).
As the technical scheme of optimization, the gas-steam combined circulating generation unit high-pressure steam manifold stage control system is also
Including service main road (11) and second flow transmitter (12), service main road (11) and second flow transmitter (12) phase
Even, second flow transmitter (12) is connected with water level controller (8).
As the technical scheme of optimization, the gas-steam combined circulating generation unit high-pressure steam manifold stage control system is also
Including the 3rd flow transmitter (16), the second feedwater piping (2) is also associated with the 3rd flow transmitter (16), and the 3rd flow becomes
Device (16) is sent to be connected with flow controller (15).
The utility model has advantages below compared with prior art：
1st, the aperture of high-pressure feed water regulating valve is linked into before TCA flow control circuits are used as by introducing valve position transmitter
Feedback, during the adjustment of high-pressure feed water regulating valve water level, TCA flow control valves are corresponding to be changed in time, the stream of parallel pipeline
It is excessive that amount is unlikely to inverse change, so as to ensure that feedwater flow acts on water level regulation in time.
2nd, using flow transmitter, the regulation of TCA flow control valves closed loop is directly carried out, so as to avoid regulating valve linear not
It is good, influence this loop and associate the control in loop, reduce the interference fed water to HP steam drum by so improving, ensure again
TCA control loop traffic requirements.
3rd, by the way that the feedwater flow signal on service main road, and the steam flow signal of steam pipework are introduced into water level control
Device, original single pulse water level regulation is changed to three impulses water level regulation, so as to further avoid during water level regulation, by
In influence of the parallel pipeline to feedwater flow and steam water-level.
Brief description of the drawings
Fig. 1 is the system knot of the utility model gas-steam combined circulating generation unit high-pressure steam manifold stage control system
Composition.
Embodiment
Embodiment of the present utility model is elaborated below, the present embodiment using technical solutions of the utility model before
Put and implemented, give detailed embodiment and specific operating process, but the scope of protection of the utility model is unlimited
In following embodiments.
As shown in figure 1, the present embodiment gas-steam combined circulating generation unit high-pressure steam manifold stage control system includes the
One feedwater piping 1, the second feedwater piping 2, service main road 11, jet chimney 9, HP steam drum 100, high-pressure feed water regulating valve
3rd, economizer 4, TCA coolers 5, TCA flow control valves 6, water level transmitter 7, water level controller 8, first flow transmitter 10,
Second flow transmitter 12, the 3rd flow transmitter 16, the first actuator 13, the second actuator 14, flow controller 15, valve position
Transmitter 17.
First feedwater piping 1, the second feedwater piping 2, the entrance connection high-pressure feed water in service main road 11；Described
First feedwater piping 1 is connected with one end of high-pressure feed water regulating valve 3, the other end and the economizer 4 of high-pressure feed water regulating valve 3
One end is connected, and the other end of economizer 4 is connected with HP steam drum 100；Second feedwater piping 2 is connected with TCA coolers 5, TCA coolings
Device 5 is connected with TCA flow control valves 6, and TCA flow control valves 6 are connected with HP steam drum 100；HP steam drum 100 becomes with water level
Device 7 is sent to be connected, water level transmitter 7 is connected with water level controller 8；Water level controller 8 connects high pressure by the first actuator 13 and given
Water regulating valve 3；High-pressure feed water regulating valve 3 is connected to flow controller 15 by valve position transmitter 17；Flow controller 15 passes through
Second actuator 14 is connected to TCA flow control valves 6.
As the technical scheme further optimized, the input of jet chimney 9 is connected with the output end of HP steam drum 100, steams
Steam pipe road 9 is connected with first flow transmitter 10, and first flow transmitter 10 is connected with water level controller 8, and water level controller 8 connects
It is connected to the first actuator 13.
As the technical scheme further optimized, service main road 11 is connected with second flow transmitter 12, second flow
Transmitter 12 is connected with water level controller 8.
As the technical scheme further optimized, the second feedwater piping 2 is also associated with the 3rd flow transmitter 16, the 3rd stream
Transmitter 16 is connected with flow controller 15.
The aperture of high-pressure feed water regulating valve 3 is linked into TCA flow control circuits by introducing valve position transmitter 17 to be used as
Feedforward, during the adjustment of the water level of high-pressure feed water regulating valve 3, TCA flow control valves 6 are corresponding to be changed in time, parallel pipeline
Flow to be unlikely to inverse change excessive, so as to ensure that feedwater flow acts on water level regulation in time.
Using flow transmitter 12, the closed loop regulation of TCA flow control valves 6 is directly carried out, so as to avoid regulating valve linear not
It is good, influence this loop and associate the control in loop, reduce the interference fed water to HP steam drum by so improving, ensure again
TCA control loop traffic requirements.
By the way that the feedwater flow signal in service main road 11, and the steam flow signal of steam pipework 9 are introduced into water level control
Device 8 processed, original single pulse water level regulation is changed to three impulses water level regulation, so as to further avoid in water level regulation process
In, due to influence of the parallel pipeline to feedwater flow and steam water-level.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (4)
1. a kind of gas-steam combined circulating generation unit high-pressure steam manifold stage control system, it is characterised in that given including first
Waterpipe (1), the second feedwater piping (2), HP steam drum (100), high-pressure feed water regulating valve (3), economizer (4), cooler
(5), flow control valve (6), water level transmitter (7), water level controller (8), the first actuator (13), the second actuator (14),
Flow controller (15), valve position transmitter (17)；
First feedwater piping (1), the entrance connection high-pressure feed water of the second feedwater piping (2)；The first described feedwater piping
(1) one end with high-pressure feed water regulating valve (3) is connected, one end phase of the other end and economizer (4) of high-pressure feed water regulating valve (3)
Even, economizer (4) other end is connected with HP steam drum (100)；Second feedwater piping (2) is connected with cooler (5), cooler
(5) it is connected with flow control valve (6), flow control valve (6) is connected with HP steam drum (100)；HP steam drum (100) becomes with water level
Device (7) is sent to be connected, water level transmitter (7) is connected with water level controller (8)；Water level controller (8) passes through the first actuator (13)
Connect high-pressure feed water regulating valve (3)；High-pressure feed water regulating valve (3) is connected to flow controller by valve position transmitter (17)
(15)；Flow controller (15) is connected to flow control valve (6) by the second actuator (14).
2. a kind of gas-steam combined circulating generation unit high-pressure steam manifold stage control system according to claim 1, its
It is characterised by, in addition to jet chimney (9) and first flow transmitter (10), jet chimney (9) input and HP steam drum
(100) output end is connected, and jet chimney (9) is connected with first flow transmitter (10), first flow transmitter (10) and water
Level controller (8) is connected, and water level controller (8) is connected to the first actuator (13).
3. a kind of gas-steam combined circulating generation unit high-pressure steam manifold stage control system according to claim 2, its
It is characterised by, in addition to service main road (11) and second flow transmitter (12), service main road (11) and second quantitative change
Device (12) is sent to be connected, second flow transmitter (12) is connected with water level controller (8).
A kind of 4. gas-steam combined circulating generation unit high-pressure steam manifold stage control according to any one of claims 1 to 3
System processed, it is characterised in that also including the 3rd flow transmitter (16), the second feedwater piping (2) is also associated with the change of the 3rd flow
Device (16) is sent, the 3rd flow transmitter (16) is connected with flow controller (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720787524.9U CN207122891U (en) | 2017-06-30 | 2017-06-30 | A kind of gas combustion-gas vapor combined cycle unit high-pressure steam manifold stage control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720787524.9U CN207122891U (en) | 2017-06-30 | 2017-06-30 | A kind of gas combustion-gas vapor combined cycle unit high-pressure steam manifold stage control system |
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| Publication Number | Publication Date |
|---|---|
| CN207122891U true CN207122891U (en) | 2018-03-20 |
Family
ID=61615579
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720787524.9U Expired - Fee Related CN207122891U (en) | 2017-06-30 | 2017-06-30 | A kind of gas combustion-gas vapor combined cycle unit high-pressure steam manifold stage control system |
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| Country | Link |
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| CN (1) | CN207122891U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164839A (en) * | 2018-08-23 | 2019-01-08 | 华北电力大学（保定） | A kind of valve non-linear compensation method of Drum Water Level Control System for Boiler |
-
2017
- 2017-06-30 CN CN201720787524.9U patent/CN207122891U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164839A (en) * | 2018-08-23 | 2019-01-08 | 华北电力大学（保定） | A kind of valve non-linear compensation method of Drum Water Level Control System for Boiler |
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| Date | Code | Title | Description |
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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: 20180320 Termination date: 20190630 |