CN103452608A - Control device and control method for condensate system - Google Patents
Control device and control method for condensate system Download PDFInfo
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- CN103452608A CN103452608A CN2013103976105A CN201310397610A CN103452608A CN 103452608 A CN103452608 A CN 103452608A CN 2013103976105 A CN2013103976105 A CN 2013103976105A CN 201310397610 A CN201310397610 A CN 201310397610A CN 103452608 A CN103452608 A CN 103452608A
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- 238000000034 method Methods 0.000 title claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 230000001276 controlling effect Effects 0.000 claims abstract description 16
- 230000001143 conditioned effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 2
- 230000036316 preload Effects 0.000 claims 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000011068 loading method Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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Abstract
The invention discloses a control device for a condensate system. The condensate system comprises a condensate pump and a deaerator. The control device comprises a speed regulating device and a controller, wherein the speed regulating device is connected with the condensate pump and is used for regulating the revolving speed of the condensate pump; and the controller is used for controlling the speed regulating device to regulate the revolving speed of the condensate pump, so as to enable the difference between the outlet pressure of the condensate pump and the outlet pressure of the deaerator to reach ideal pressure difference delta P<target> and guarantee the water flow at the outlet of the condensate pump. By using the device, the energy can be saved, the service life of equipment is prolonged and the stable operation of the unit is guaranteed.
Description
Technical field
The present invention relates to condensate system, particularly, relate to a kind of control gear for condensate system and controlling method.
Background technique
At present, 1000MW unit condensate system disposes 3 condensate pumps usually, and wherein a condensate pump is reserve pump, and these 3 condensate pumps are all general pumps, and itself and vapour condenser, oxygen-eliminating device etc. form condensate system.Through the steam of steam turbine vapour condenser is cooling condense after, concentrate in hot well, condensate pump is delivered to water of condensation in oxygen-eliminating device in time.When normal operation, the water level in oxygen-eliminating device can not be too high or too low, and the water level of therefore regulating in oxygen-eliminating device is the operating important process of condensate pump.
Water level adjustment in oxygen-eliminating device at present is to adjust oxygen-eliminating device flow of inlet water (the pump discharge flow condenses) by the aperture of the major and minor modulating valve of water on the change oxygen-eliminating device to carry out.In this process, the water of condensation pump curve is constant, and blade rotational speed is constant, but increases artificially pipe resistance to reduce flow by turning down modulating valve.So, a large amount of energy losses are on valve.Simultaneously, condensate pump is moving at a high speed and under the state of large load for a long time, and modulating valve may be subject to the enormous pressure impact for a long time, this not only wastes large energy, and make reduce life of equipment, affect the stable operation of unit, and greatly increased the workload of safeguarding.
Summary of the invention
The control gear and the controlling method that the purpose of this invention is to provide a kind of condensate system, can energy saving by these apparatus and method, and the working life of extension device, guarantees the stable operation of unit.
To achieve these goals, the invention provides a kind of control gear for condensate system, this condensate system comprises condensate pump and oxygen-eliminating device, and described control gear comprises: arrangements for speed regulation, with described condensate pump, be connected, for regulating the rotating speed of described condensate pump; And controller, for regulate the rotating speed of described condensate pump by controlling described arrangements for speed regulation, so that the pressure difference of described condensate pump outlet pressure and described oxygen-eliminating device outlet pressure meets the poor Δ P of this desired pressure between the two
targetthereby, the rate of discharge of assurance condensate pump.
The present invention also provides a kind of controlling method for condensate system, this condensate system comprises vapour condenser, condensate pump and oxygen-eliminating device, and described controlling method comprises: regulate the rotating speed of described condensate pump so that the pressure difference of described condensate pump outlet pressure and described oxygen-eliminating device outlet pressure meets the poor Δ P of this desired pressure between the two
targetthereby, the rate of discharge of assurance condensate pump.
The present invention controls arrangements for speed regulation by controller and regulates the rotating speed of condensate pump to regulate the pressure difference of condensate pump outlet pressure and described oxygen-eliminating device outlet pressure, thereby realize the adjusting to the condensate pump rate of discharge, so avoided the long-term high speed large load operation of condensate pump, thereby saved the energy, and the working life of extension device, guarantee the stable operation of unit.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
The accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the block diagram according to the control gear for condensate system of the present invention;
Fig. 2 is the block diagram according to the control gear for condensate system of one embodiment of the present invention; And
Fig. 3 is the block diagram according to the deaerator level of the control gear for the condensate system control section of one embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Fig. 1 is the block diagram according to the control gear for condensate system of the present invention.Condensate system can comprise condensate pump 12 and oxygen-eliminating device (not shown).As shown in Figure 1, the control gear of condensate system provided by the present invention can comprise: arrangements for speed regulation 11 are connected with condensate pump 12, for regulating the rotating speed of described condensate pump 12; And controller 10, for regulate the rotating speed of condensate pump 12 by controlling arrangements for speed regulation 11, so that the pressure difference of the outlet pressure of condensate pump 12 and oxygen-eliminating device outlet pressure meets the poor Δ P of this desired pressure between the two
targetthereby, the rate of discharge of assurance condensate pump 12.
Control gear provided by the present invention also can comprise the condensate pump outlet valve, for regulating the water flow of condensate pump outlet, in embodiments of the present invention, it is full-gear that controller 10 is controlled this condensate pump outlet valve, thereby can realize the outlet pressure adjusting by the rotating speed of regulating condensate pump 12 fully, and do not rely on, not adjust a mouthful valve opening.Certainly, in full-gear, in a larger opening, be not fine yet.
Fig. 2 is the block diagram according to the control gear for condensate system of one embodiment of the present invention.As shown in Figure 2, the control gear that this mode of execution provides, except comprising arrangements for speed regulation 11 and controller 10, can also comprise storage 14, pressure transducer 15 and a PID arithmetic mean unit 13.Wherein, can store the poor Δ P of condensate system corresponding desired pressure under different load in storage 14
target, pressure transducer 15 is for detection of the poor Δ P of current pressure that detects condensate pump outlet pressure and oxygen-eliminating device outlet pressure
current.Below will describe the detailed process of determining the condensate pump rotating speed by the PID computing in detail.
As shown in Figure 2, a PID arithmetic mean unit 13 is by the poor Δ P of the desired pressure of storing in storage 14
targetas the dreamboat value of regulating, the poor Δ P of the current pressure that pressure transducer 15 is detected
currentas the value of being conditioned, these two values are carried out to the PID computing, by computing, draw the poor Δ P of current pressure
currentbe adjusted to the poor Δ P of desired pressure
targetthe rotating speed of needed condensate pump.The rotating speed of the condensate pump then computing drawn transfers in controller 10, by controller 10 control arrangements for speed regulation 11 by the rotational speed regulation of condensate pump 12 to the drawn tachometer value of computing, make condensate pump 12 with this rotating speed operation, thereby can make the pressure difference of condensate pump outlet pressure and oxygen-eliminating device outlet pressure reach the poor Δ P of desired pressure under this system loading
target.
The poor Δ P of desired pressure referred to above
targetcan with the form of broken line, be stored in storage 14, this broken line can be drawn and form for the experiment of the repeatedly multiple spot through under different system loadings.But the present invention is not restricted to this, those skilled in the art should understand that and can realize technique scheme of the present invention by any suitable method means.
, should be appreciated that simultaneously, under certain system loading, utilize the PID computing to draw the poor Δ P of desired pressure
targetthe rotating speed of corresponding condensate pump, the rotating speed by this condensate pump can guarantee that the pressure of now condensate pump outlet is in ideal range, thus the water flow that has guaranteed the condensate pump outlet is in ideal range.And pressure and the conversion relation between water flow of condensate pump rotating speed, condensate pump outlet are known in those skilled in the art, therefore repeat no more.
Fig. 3 is the block diagram according to the deaerator level of the control gear for the condensate system control section of one embodiment of the present invention.As shown in Figure 3, in this embodiment, control gear can also comprise second memory 18, the 2nd PID arithmetic mean unit 16 and deaerator level control valve 17.Wherein, deaerator level control valve 17 is regulated the water level of described oxygen-eliminating device for the flow of inlet water by regulating described oxygen-eliminating device, thereby guarantees that deaerator level is in ideal range.Below will describe the detailed process of regulating deaerator level in detail.Wherein, second memory 18 can be same storage with storage 14.
And, experimental results show that, it is fast that the control characteristic of by deaerator level control valve 17, regulating deaerator levels is only controlled the control characteristic of deaerator level by the condensate pump rotating speed than deaerator level control valve being fixed on to a certain aperture, and control the condensate pump outlet pressure to change the condensate pump outlet pressure than the aperture by changing deaerator level control valve fast by changing the condensate pump rotating speed.
Same, the desirable water flow F of above-mentioned oxygen-eliminating device
outdesired level of water H with oxygen-eliminating device
targetcan obtain by the experiment of carrying out repeatedly multiple spot under different system loadings.
In addition, in the condensate pump control loop in condensate system, the frequency equilibrium loop can also be set, consistent to guarantee exerting oneself of two condensate pumps.
Control gear for condensate system provided by the present invention is according to the outlet pressure of the corresponding condensate pump 12 of the actual load of condensate system and the poor Δ P of desired pressure of oxygen-eliminating device outlet pressure
target, control the rotating speed of condensate pump to reach the poor Δ P of this desired pressure
targetthereby, guaranteed that the pressure of the condensate pump outlet of condensate system when different load and flow are within ideal range, and guaranteed by regulating deaerator level control valve that deaerator level is within desirable control range.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned mode of execution; in technical conceive scope of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, between various mode of execution of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. the control gear for condensate system, this condensate system comprises condensate pump and oxygen-eliminating device, it is characterized in that, described control gear comprises:
Arrangements for speed regulation, be connected with described condensate pump, for regulating the rotating speed of described condensate pump; And
Controller, for regulate the rotating speed of described condensate pump by controlling described arrangements for speed regulation, so that the pressure difference of described condensate pump outlet pressure and described oxygen-eliminating device outlet pressure meets the poor Δ P of this desired pressure between the two
targetthereby, guarantee the water flow that condensate pump exports.
2. control gear according to claim 1, is characterized in that, described control gear also comprises the condensate pump outlet valve, and it is full-gear that described controller is controlled described condensate pump outlet valve.
3. control gear according to claim 1 and 2, is characterized in that, described control gear also comprises storage and pressure transducer, and wherein, described storage is for storing described condensate system poor Δ P of corresponding described desired pressure under different load
target, described pressure transducer is for detection of the poor Δ P of the current pressure of described condensate pump outlet pressure and described oxygen-eliminating device outlet pressure
current.
4. control gear according to claim 3, is characterized in that, described control gear also comprises a PID arithmetic mean unit, for described condensate system is being worked as to the poor Δ P of corresponding desired pressure under preload
targetwith the poor Δ P of described current pressure
currentcarry out the PID computing, described controller is controlled the rotating speed of described condensate pump, wherein Δ P according to the PID operation result
currentthe value of being conditioned for this PID computing.
5. control gear according to claim 1, is characterized in that, described control gear also comprises deaerator level control valve, regulates the water level of described oxygen-eliminating device for the flow of inlet water by regulating described oxygen-eliminating device.
6. control gear according to claim 5, is characterized in that, described control gear also comprises second memory, and this second memory is for storing the desirable water flow F of described condensate system corresponding described oxygen-eliminating device under different load
outdesired level of water H with described oxygen-eliminating device
target.
7. control gear according to claim 6, is characterized in that, described control gear also comprises the 2nd PID arithmetic mean unit, for described condensate system is being worked as to corresponding desirable water flow F under preload
out, desired level of water H
targetand the flow of inlet water F of described oxygen-eliminating device
incarry out the PID computing, described controller is controlled the aperture of described deaerator level control valve, wherein F according to the PID operation result
inthe value of being conditioned for this PID computing.
8. the controlling method for condensate system, this condensate system comprises vapour condenser, condensate pump and oxygen-eliminating device, it is characterized in that, described controlling method comprises:
Regulate the rotating speed of described condensate pump so that the pressure difference of described condensate pump outlet pressure and described oxygen-eliminating device outlet pressure meets the poor Δ P of this desired pressure between the two
targetthereby, guarantee the water flow that condensate pump exports.
9. controlling method according to claim 8, is characterized in that,
Described condensate system also comprises the condensate pump outlet valve,
Described controlling method also comprises that controlling described condensate pump outlet valve is full-gear.
10. controlling method according to claim 8, is characterized in that,
Described condensate system is being worked as to the poor Δ P of corresponding desired pressure under preload
targetwith the poor Δ P of the current pressure of described condensate pump outlet pressure and described oxygen-eliminating device pressure
currentcarry out the PID computing; And
Control the rotating speed of described condensate pump according to the PID operation result, wherein Δ P
currentthe value of being conditioned for this PID computing.
11. the described controlling method of any one claim according in the claims, is characterized in that,
Described condensate system is being worked as to corresponding desirable water flow F under preload
out, desired level of water H
targetand the flow of inlet water F of described oxygen-eliminating device
incarry out the PID computing; And
Control the aperture of described deaerator level control valve according to the PID operation result, wherein F
inthe value of being conditioned for this PID computing.
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| CN201310397610.5A CN103452608B (en) | 2013-09-04 | 2013-09-04 | A kind of control gear for condensate system and controlling method |
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| CN201310397610.5A CN103452608B (en) | 2013-09-04 | 2013-09-04 | A kind of control gear for condensate system and controlling method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656688A (en) * | 2014-12-24 | 2015-05-27 | 大唐贵州发耳发电有限公司 | Novel deaerator water level control system |
| CN104714566A (en) * | 2015-01-08 | 2015-06-17 | 华北电力大学 | Condensation water throttle control system and safety control method thereof |
| CN108061026A (en) * | 2016-11-07 | 2018-05-22 | 上海上电漕泾发电有限公司 | A kind of condensation water tune duty control method of adaptive solidifying pump operation mode |
| CN110260295A (en) * | 2019-07-22 | 2019-09-20 | 神华福能发电有限责任公司 | A kind of condensate system |
| CN113790438A (en) * | 2021-08-06 | 2021-12-14 | 神华神东电力有限责任公司 | Method and device for switching operation modes of condensate system |
| CN113847230A (en) * | 2021-09-29 | 2021-12-28 | 西安热工研究院有限公司 | Method for analyzing expected effect of depth frequency conversion of condensate pump |
| CN114234171A (en) * | 2021-12-02 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | Deaerator pressure control method |
| CN114321878A (en) * | 2021-12-22 | 2022-04-12 | 江苏核电有限公司 | Transient pressure control method for deaerator during large-amplitude load shedding of nuclear power unit |
| CN110260295B (en) * | 2019-07-22 | 2024-06-04 | 神华福能发电有限责任公司 | Condensate system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63223489A (en) * | 1987-03-13 | 1988-09-16 | Toshiba Corp | Condensate control system |
| JPH0333495A (en) * | 1989-06-29 | 1991-02-13 | Toshiba Corp | Control device for condensate pump |
| JPH0375401A (en) * | 1989-08-17 | 1991-03-29 | Toshiba Corp | Water level controller of deaerator |
| CN202768359U (en) * | 2012-07-18 | 2013-03-06 | 江苏徐塘发电有限责任公司 | Frequency conversion system for double condensate pumps |
| CN103133319A (en) * | 2013-02-20 | 2013-06-05 | 浙江省电力公司电力科学研究院 | Frequency converting control method and system of condensate pump of condensed steam generator set |
| CN203052636U (en) * | 2013-01-23 | 2013-07-10 | 中国神华能源股份有限公司 | Condensate water circulation system of power plant |
| CN203962058U (en) * | 2013-09-04 | 2014-11-26 | 中国神华能源股份有限公司 | A kind of control gear for condensate system |
-
2013
- 2013-09-04 CN CN201310397610.5A patent/CN103452608B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63223489A (en) * | 1987-03-13 | 1988-09-16 | Toshiba Corp | Condensate control system |
| JPH0333495A (en) * | 1989-06-29 | 1991-02-13 | Toshiba Corp | Control device for condensate pump |
| JPH0375401A (en) * | 1989-08-17 | 1991-03-29 | Toshiba Corp | Water level controller of deaerator |
| CN202768359U (en) * | 2012-07-18 | 2013-03-06 | 江苏徐塘发电有限责任公司 | Frequency conversion system for double condensate pumps |
| CN203052636U (en) * | 2013-01-23 | 2013-07-10 | 中国神华能源股份有限公司 | Condensate water circulation system of power plant |
| CN103133319A (en) * | 2013-02-20 | 2013-06-05 | 浙江省电力公司电力科学研究院 | Frequency converting control method and system of condensate pump of condensed steam generator set |
| CN203962058U (en) * | 2013-09-04 | 2014-11-26 | 中国神华能源股份有限公司 | A kind of control gear for condensate system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656688A (en) * | 2014-12-24 | 2015-05-27 | 大唐贵州发耳发电有限公司 | Novel deaerator water level control system |
| CN104714566A (en) * | 2015-01-08 | 2015-06-17 | 华北电力大学 | Condensation water throttle control system and safety control method thereof |
| CN108061026A (en) * | 2016-11-07 | 2018-05-22 | 上海上电漕泾发电有限公司 | A kind of condensation water tune duty control method of adaptive solidifying pump operation mode |
| CN110260295A (en) * | 2019-07-22 | 2019-09-20 | 神华福能发电有限责任公司 | A kind of condensate system |
| CN110260295B (en) * | 2019-07-22 | 2024-06-04 | 神华福能发电有限责任公司 | Condensate system |
| CN113790438B (en) * | 2021-08-06 | 2024-03-01 | 神华神东电力有限责任公司 | Method and device for switching operation mode of condensate system |
| CN113790438A (en) * | 2021-08-06 | 2021-12-14 | 神华神东电力有限责任公司 | Method and device for switching operation modes of condensate system |
| CN113847230A (en) * | 2021-09-29 | 2021-12-28 | 西安热工研究院有限公司 | Method for analyzing expected effect of depth frequency conversion of condensate pump |
| CN113847230B (en) * | 2021-09-29 | 2024-03-26 | 西安热工研究院有限公司 | Analysis method for deep variable frequency expected effect of condensate pump |
| CN114234171A (en) * | 2021-12-02 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | Deaerator pressure control method |
| CN114234171B (en) * | 2021-12-02 | 2023-12-05 | 中国船舶重工集团公司第七0三研究所 | Deaerator pressure control method |
| CN114321878B (en) * | 2021-12-22 | 2023-08-15 | 江苏核电有限公司 | Transient pressure control method for deaerator during large-amplitude load shedding of nuclear power unit |
| CN114321878A (en) * | 2021-12-22 | 2022-04-12 | 江苏核电有限公司 | Transient pressure control method for deaerator during large-amplitude load shedding of nuclear power unit |
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Address after: 100011 Beijing Dongcheng District, West Binhe Road, No. 22 Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: BEIJING GUOHUA ELECTRIC POWER Corp.,Ltd. Patentee after: Guoneng Yuedian Taishan Power Generation Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: BEIJING GUOHUA ELECTRIC POWER Corp.,Ltd. Patentee before: GUANGDONG GUOHUA YUEDIAN TAISHAN POWER GENERATION Co.,Ltd. |
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