CN203962058U - A kind of control gear for condensate system - Google Patents
A kind of control gear for condensate system Download PDFInfo
- Publication number
- CN203962058U CN203962058U CN201320547819.0U CN201320547819U CN203962058U CN 203962058 U CN203962058 U CN 203962058U CN 201320547819 U CN201320547819 U CN 201320547819U CN 203962058 U CN203962058 U CN 203962058U
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- Prior art keywords
- control gear
- condensate pump
- condensate
- oxygen
- eliminating device
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 230000001143 conditioned effect Effects 0.000 claims description 7
- 230000036316 preload Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 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 utility model discloses 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, are 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, to make the pressure difference of described condensate pump outlet pressure and described oxygen-eliminating device outlet pressure meet the poor Δ P of desired pressure between it
targetthereby, ensure the water flow of condensate pump outlet, can energy saving by this device, and the working life of extension device, ensure the stable operation of unit.
Description
Technical field
The utility model relates to condensate system, particularly, relates to a kind of control gear for condensate system.
Background technique
At present, 1000MW unit condensate system disposes 3 condensate pumps conventionally, 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.In the time of normal operation, the water level in oxygen-eliminating device can not be too high or too low, and therefore regulating the water level in oxygen-eliminating device is the operating important process of condensate pump.
Water level adjustment in oxygen-eliminating device is at present to adjust oxygen-eliminating device flow of inlet water (pump discharge flow condenses) by the aperture of the major and minor modulating valve of water on change oxygen-eliminating device to carry out.In this process, 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.Meanwhile, 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 enormous pressure impact for a long time, this not only wastes large energy, and reduced life of equipment, affect the stable operation of unit, and greatly increased the workload of safeguarding.
Model utility content
The purpose of this utility model is to provide a kind of control gear of condensate system, can energy saving by this device, and the working life of extension device, ensure the stable operation of unit.
To achieve these goals, the utility model provides a kind of control gear for condensate system, and this condensate system comprises condensate pump and oxygen-eliminating device, and 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, to make the pressure difference of described condensate pump outlet pressure and described oxygen-eliminating device outlet pressure meet the poor Δ P of this desired pressure between the two
targetthereby, the rate of discharge of guarantee condensate pump.
Preferably, described control gear also comprises condensate pump outlet valve, and condensate pump outlet valve is full-gear described in described controller control.
Preferably, described control gear also comprises storage and pressure transducer, and wherein, described storage is used 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 current pressure of described condensate pump outlet pressure and described oxygen-eliminating device outlet pressure
current.
Preferably, 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 PID computing, described controller is controlled the rotating speed of described condensate pump, wherein Δ P according to PID operation result
currentfor the value of being conditioned of this PID computing.
Preferably, described control gear also comprises deaerator level control valve, for regulate the water level of described oxygen-eliminating device by the flow of inlet water that regulates described oxygen-eliminating device.
Preferably, described control gear also comprises storage, and this storage 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.
Preferably, 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 PID computing, described controller is controlled the aperture of described deaerator level control valve, wherein F according to PID operation result
infor the value of being conditioned of this PID computing.
The utility model regulates the rotating speed of condensate pump to regulate the pressure difference of condensate pump outlet pressure and described oxygen-eliminating device outlet pressure by controller control arrangements for speed regulation, thereby realize the adjusting to condensate pump rate of discharge, so avoid the long-term high speed large load operation of condensate pump, thereby save the energy, and the working life of extension device, ensure the stable operation of unit.
Other feature and advantage of the present utility model are described in detail the embodiment part subsequently.
Brief description of the drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is according to the block diagram of the control gear for condensate system of the present utility model;
Fig. 2 is according to the block diagram of the control gear for condensate system of a kind of mode of execution of the utility model; And
Fig. 3 is according to the block diagram of the control gear deaerator level control section for condensate system of a kind of mode of execution of the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
Fig. 1 is according to the block diagram of the control gear for condensate system of the present utility model.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 utility model 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, to make the outlet pressure of condensate pump 12 and the pressure difference of oxygen-eliminating device outlet pressure meet the poor Δ P of this desired pressure between the two
targetthereby, the rate of discharge of guarantee condensate pump 12.
Control gear provided by the utility model also can comprise condensate pump outlet valve, for regulating the water flow of condensate pump outlet, in mode of execution of the present utility model, it is full-gear that controller 10 is controlled this condensate pump outlet valve, thereby can regulate by regulating the rotating speed of condensate pump 12 to realize outlet pressure completely, adjust a mouthful valve opening and do not rely on.Certainly, be not also fine in a larger opening in full-gear.
Fig. 2 is according to the block diagram of the control gear for condensate system of a kind of mode of execution of the utility model.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, in storage 14, can store the poor Δ P of condensate system corresponding desired pressure under different load
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.The detailed process of determining condensate pump rotating speed by PID computing will be described in detail below.
As shown in Figure 2, a PID arithmetic mean unit 13 is by poor the desired pressure of storing in storage 14 Δ P
targetas the dreamboat value regulating, the poor Δ P of current pressure that pressure transducer 15 is detected
currentas the value of being conditioned, these two values are carried out to PID computing, draw poor current pressure Δ P by computing
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 being drawn transfers in controller 10, control by controller 10 tachometer value that arrangements for speed regulation 11 draw the rotational speed regulation of condensate pump 12 to 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 be stored in storage 14 with the form of broken line, this broken line can be to draw and form through the experiment of the repeatedly multiple spot under different system loadings.But the utility model is not restricted to this, those skilled in the art should understand that and can realize technique scheme of the present utility model by any suitable method means.
, should be appreciated that meanwhile, under certain system loading, utilize PID computing to draw the poor Δ P of desired pressure
targetthe rotating speed of corresponding condensate pump, the pressure that can ensure now condensate pump outlet by the rotating speed of this condensate pump is in ideal range, thus the water flow that has ensured condensate pump outlet is in ideal range.And conversion relation between pressure and the water flow of the outlet of condensate pump rotating speed, condensate pump is known in those skilled in the art, therefore repeat no more.
Fig. 3 is according to the block diagram of the control gear deaerator level control section for condensate system of a kind of mode of execution of the utility model.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 for regulate the water level of described oxygen-eliminating device by the flow of inlet water that regulates described oxygen-eliminating device, thereby guarantee deaerator level is in ideal range.The detailed process that regulates deaerator level will be described in detail below.Wherein, second memory 18 can be same storage with storage 14.
Second memory 18 can also be used for storing the desirable water flow F of described condensate system corresponding oxygen-eliminating device under different load
outdesired level of water H with oxygen-eliminating device
target.As shown in Figure 3, the 2nd PID arithmetic mean unit 16 is by the desirable water flow F storing in second memory 18
outdesired level of water H with oxygen-eliminating device
targetas the dreamboat value regulating, by oxygen-eliminating device flow of inlet water F
inas the value of being conditioned, dreamboat value and the value of being conditioned are carried out to PID computing, draw and meet the desirable water flow F of oxygen-eliminating device by computing
outdesired level of water H with oxygen-eliminating device
targetrequired oxygen-eliminating device flow of inlet water, thus calculate the aperture that meets the needed deaerator level control valve 17 of above-mentioned oxygen-eliminating device flow of inlet water, to realize the flow of inlet water of above-mentioned oxygen-eliminating device.Wherein, oxygen-eliminating device water inlet is that the water outlet of condensate pump outlet enters oxygen-eliminating device after deaerator level control valve, should be appreciated that, guaranteeing by above-described method under the prerequisite of condensate pump outlet water flow, can realize the adjustment to deaerator level by the regulation oxygen-eliminating device inflow of the modulating valve 17 of adjusting oxygen-eliminating device.
And, experimental results show that, it is fast that the control characteristic that regulates deaerator level by deaerator level control valve 17 is only controlled the control characteristic of deaerator level by condensate pump rotating speed than deaerator level control valve being fixed on to a certain aperture, and to control condensate pump outlet pressure faster than changing condensate pump outlet pressure by the aperture that changes deaerator level control valve by changing 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, frequency equilibrium loop can also be set, consistent to ensure exerting oneself of two condensate pumps.
Control gear for condensate system provided by the utility model is according to the poor Δ P of the desired pressure of the outlet pressure of the corresponding condensate pump 12 of the actual load of condensate system and oxygen-eliminating device outlet pressure
target, control the rotating speed of condensate pump to reach the poor Δ P of this desired pressure
targetthereby, ensure that the pressure of the condensate pump outlet of condensate system in the time of different load and flow are within ideal range, and by regulating deaerator level control valve to guarantee that deaerator level is within desirable control range.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between various mode of execution of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (7)
1. for a 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, are 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, ensures the water flow of condensate pump outlet.
2. control gear according to claim 1, is characterized in that, described control gear also comprises condensate pump outlet valve, and condensate pump outlet valve is full-gear described in described controller control.
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 used for storing the poor Δ P of described condensate system corresponding desired pressure under different load
target, described pressure transducer is for detection of the poor Δ P of 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 PID computing, described controller is controlled the rotating speed of described condensate pump, wherein Δ P according to PID operation result
currentfor the value of being conditioned of this PID computing.
5. control gear according to claim 1, is characterized in that, described control gear also comprises deaerator level control valve, for regulate the water level of described oxygen-eliminating device by the flow of inlet water that regulates described oxygen-eliminating device.
6. control gear according to claim 5, is characterized in that, described control gear also comprises storage, and this storage 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 PID computing, described controller is controlled the aperture of described deaerator level control valve, wherein F according to PID operation result
infor the value of being conditioned of this PID computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320547819.0U CN203962058U (en) | 2013-09-04 | 2013-09-04 | A kind of control gear for condensate system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320547819.0U CN203962058U (en) | 2013-09-04 | 2013-09-04 | A kind of control gear for condensate system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203962058U true CN203962058U (en) | 2014-11-26 |
Family
ID=51922657
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320547819.0U Expired - Lifetime CN203962058U (en) | 2013-09-04 | 2013-09-04 | A kind of control gear for condensate system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203962058U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452608A (en) * | 2013-09-04 | 2013-12-18 | 中国神华能源股份有限公司 | Control device and control method for condensate system |
| CN107256041A (en) * | 2017-05-15 | 2017-10-17 | 北京源深节能技术有限责任公司 | The control method of deaerator level during a kind of condensate throttling |
| CN110107489A (en) * | 2019-04-19 | 2019-08-09 | 中国神华能源股份有限公司 | Control method, system and unit for condensed water water pump |
-
2013
- 2013-09-04 CN CN201320547819.0U patent/CN203962058U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452608A (en) * | 2013-09-04 | 2013-12-18 | 中国神华能源股份有限公司 | Control device and control method for condensate system |
| CN103452608B (en) * | 2013-09-04 | 2015-08-12 | 中国神华能源股份有限公司 | A kind of control gear for condensate system and controlling method |
| CN107256041A (en) * | 2017-05-15 | 2017-10-17 | 北京源深节能技术有限责任公司 | The control method of deaerator level during a kind of condensate throttling |
| CN110107489A (en) * | 2019-04-19 | 2019-08-09 | 中国神华能源股份有限公司 | Control method, system and unit for condensed water water pump |
| CN110107489B (en) * | 2019-04-19 | 2020-09-18 | 中国神华能源股份有限公司 | Control method, system and unit for condensate water pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141126 Effective date of abandoning: 20150812 |
|
| RGAV | Abandon patent right to avoid regrant |