CN206111506U - Condensate pump frequency conversion automatic control system - Google Patents
Condensate pump frequency conversion automatic control system Download PDFInfo
- Publication number
- CN206111506U CN206111506U CN201620693632.5U CN201620693632U CN206111506U CN 206111506 U CN206111506 U CN 206111506U CN 201620693632 U CN201620693632 U CN 201620693632U CN 206111506 U CN206111506 U CN 206111506U
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- condensate pump
- condensate
- pump
- frequency conversion
- automatic control
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Abstract
The utility model discloses a condensate pump frequency conversion automatic control system is the innovation to the automatic PID control system of condensate pump frequency conversion, including condensate pump A and condensate pump B, wherein condensate pump A adopts the power frequency control mode, and condensate pump B sets up the bypass structure into condensate pump A to set up the converter on condensate pump B, recycling adjusting valve is revised as condensate water minimum flow adjusting valve A, has set up the control instrument on minimum flow adjusting valve A, the utility model relates to a condensate pump frequency conversion automatic control system, oxygen -eliminating device water level automatic control quality satisfies the index requirement, has realized the whole automatic control of condensate system, under the condensate pump variable frequency operation state, the resistance that dams of greatly reduced oxygen -eliminating device water level pitch, energy -conserving effect is showing.
Description
Technical field
The utility model is related to power plant for energy conservation technical field, and more particularly to a kind of Condensate Pump Frequency Conversion automatically controls and is
System.
Background technology
In the generating set of thermal power plant, oxygen-eliminating device undertakes deoxygenation task in power plant thermal system, prevents equipment corrosion,
Meanwhile, it is again one of contact(-type) heater in heat regenerative system, and as the buffering between condensate pump and feed pump and storage
Water installations.Chemistry filled water in water tank of voltage regulation enters condenser through chemistry filled water regulating valve, then enters through condensate pump
Enter condensate main pipe, after gland heater, low-pressure heater and steam heater, through oxygen-eliminating device regulating valve deoxygenation is entered
Device, if condensate main-piping pressure is too high, the recycled regulating valve of a part of condensate enters condenser.
In power plant's practical application, condensate pump typically adopts vertical condensation water pump, is one in operation using pulled core structure
Platform is standby using one, and the throttling of oxygen-eliminating device regulating valve is very big, and when normally running, condensate pump outlet main-piping pressure is 3.3MPa,
It is 1.5MPa that oxygen-eliminating device adjusts downstream pressure, and pressure reduction is big, causes oxygen-eliminating device regulating valve work noise big, and valve element and valve pocket vapour corrode
Seriously, then condensate system pressure is met, under flow condition, deaerator level control valve door realizes standard-sized sheet, it becomes possible to effectively subtract
The restriction loss of few deaerator level control valve door, reduces condensate pump work done.
For this purpose, the utility model provides a kind of Condensate Pump Frequency Conversion automatic control system, can realize that condensate pump becomes
Frequency speed governing operation a, condensate pump changes VFC, and another condensate pump is industrial frequency control, and reaching guarantee does not reduce unit
Reliability, with minimum investment, exchanges the energy-saving effect of maximum for.
Utility model content
The utility model is mainly solving the technical problems that provide a kind of Condensate Pump Frequency Conversion automatic control system, Neng Gouman
Sufficient condensate system pressure, the requirement of flow, and the VFC deaerator level of condensate pump can be utilized, reduce condensing
Water pump does work, and reaches energy-saving, the purpose of optimization system.
A kind of described Condensate Pump Frequency Conversion automatic control system, is PID control system automatic to Condensate Pump Frequency Conversion
Innovation, the first innovative point is to include condensate pump A and condensate pump B, and wherein condensate pump A adopts industrial frequency control mode, is coagulated
The bypass structure that pump B is set to condensate pump A is born water, and frequency converter is provided with condensate pump B so that condensate pump B
For VFC mode.
Wherein condensate pump A is identical with water pump B structure, and using Drawing-Core structure, pump casing design helps vacuum type, stream
Measure and be:1426.6 t/h, discharge pressure:3.308 MPa.
Second innovative point is that recycling control valve is revised as condensate minimum flow regulating valve door A, in minimum discharge
Monitoring device is provided with control valve A, when condensing water flow is less than desired minimum discharge 500t/h, is adjusted by minimum discharge
Valve regulation coagulation hydroenergy backwater is saved to condenser, to meet the minimum discharge of condensate pump service requirement.
It is provided with deaerator level control valve door and automatically adjusts device so that deaerator level maintains set-point
The requirement of 2000mm.
In work, on the premise of the requirement such as condensate system pressure, flow is met, deaerator level control valve standard-sized sheet,
The loss of damming of deaerator level control valve is reduced, energy-saving purpose is reached, is to meet power conservation requirement, in condenser inlet-pressure
Power is more than 1.0 MPa, and condensate main-piping pressure is more than a certain minimum lower limit value, and minimum lower limit value is 1.4 MPa.
After condensate pump B Frequency Conversion Modifications, deaerator level is completed by Condensate Pump Frequency Conversion speed governing.
Under Condensate Pump Frequency Conversion running status, the pid parameter of deaerator level automatic regulating system is adjusted, make
Possess the good water level for automatically adjusting quality, meeting in the case of unit increasing and decreasing load, working conditions change, definite value disturbance 100mm
Static deviation is less than ± 20mm, the index of quality of the stabilization time less than 20min.
Under Condensate Pump Frequency Conversion running status, feed forward function is provided with to deaerator level automatic regulating system, is condensed
Pump variable frequency device is provided with acceptor device, and for receiving a feedforward tach signal, this feedforward rotating speed is tried by early stage
Experience acquirement is tested, is a functional relation of same unit load.
Under variable frequency pump B ruuning situations, test when condensate pump or converter plant trip, to condensate pump and oxygen-eliminating device
The automatic switching function of water level pitch is checked that the automatic switching function of deaerator level pitch is：When condensate pump or change
When frequency device trips, deaerator level pitch automatically switches to certain aperture, and this open position is taken by pre-stage test experience
, it is a functional relation of same unit load；Automatically connection is opened for condensate pump A time delays, this delay time be in order to ensure
After deaerator level pitch action has a time, to guarantee that deaerator level does not occur fluctuation, it is ensured that condensate pump or
Converter plant tripping operation breaking, when general pump A has joined, deaerator level is in controllable state.
When unit is when compared with underload, to prevent the low situation of condensate main-piping pressure from occurring, increase auxiliary in control logic
Regulation logic is helped, to ensure that condensate main-piping pressure meets the needs more than 1.2MPa.
To guarantee main-piping pressure more than the definite value, pressure divergence regulatory function is increased in logic.When condensate main-piping pressure
During less than 1.2 MPa, increase a tachometer value amplified in proportion with deviation automatically in frequency converter rotating speed control instruction, make
Condensate pump rotating speed increases, to increase condensate main-piping pressure so as to meet system requirements.Return in condensate main-piping pressure
During 1.53 MPa, this function is released.To ensure the reliability of condensate main-piping pressure signal, increase by two pressure transmitters.
Auxiliary adjustment logic module is provided with logic and increased rotating speed bias capability, and operations staff can be according to actual motion
Need, increase manually in rotating speed automatic adjustment circuit, subtract tachometer value, rotating speed increases and decreases scope ± 500 turn, after variable frequency pump tripping operation, work
The control logic of frequency pump interlocked startup is realized, after variable frequency pump fault trip, for prevent general pump immediately interlocked startup to oxygen-eliminating device
Water level disturbance is excessive, and interlocking switching deaerator level pitch command signal is sent after 5 S, and general pump re-interlocking starts, and works as frequency conversion
During pump operation, if condensate main-piping pressure is less than 1.1 MPa, logic positive locking power frequency pump startup treats condensate main-piping pressure
When returning to 1.8 more than MPa, manually operated stopping frequency conversion pump operation is that general pump can be reliable when ensureing variable frequency pump longtime running
It is standby, need periodically to start general pump isolated operation.For this purpose, increased in logic automatically switch between variable frequency pump and general pump
Blocking function.After automatic switching function is released, artificial manual switching can be carried out.
The beneficial effects of the utility model are：A kind of Condensate Pump Frequency Conversion automatic control system of the utility model, oxygen-eliminating device
Water level automatic Control Quality meets index request, realizes condensate system whole-process automatic control.In Condensate Pump Frequency Conversion operation
Under state, deaerator level pitch is shown in a fully open operation, and substantially reduces the resistance that dams of deaerator level pitch, and energy-saving effect shows
Write.
Description of the drawings
Fig. 1 is a kind of structural representation of Condensate Pump Frequency Conversion automatic control system of the utility model；
Fig. 2 be deaerator level automatically control and water level pitch automatic switchover logic；
Fig. 3 is condensate pump rotating speed VFC logic；
The mark of each part is as follows in accompanying drawing：
1 is condensate pump A, and 2 is condensate pump B, and 3 is frequency converter, and 4 is condensate minimum flow regulating valve door A.
Specific embodiment
Preferred embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings, so that advantage of the present utility model
Can be easier to be readily appreciated by one skilled in the art with feature, it is apparent clear and definite so as to make to protection domain of the present utility model
Define.
Fig. 1 to Fig. 3 is referred to, the utility model embodiment includes：
A kind of described Condensate Pump Frequency Conversion automatic control system, is PID control system automatic to Condensate Pump Frequency Conversion
Innovation, including condensate pump A and condensate pump B, wherein condensate pump A, using industrial frequency control mode, condensate pump B is set to coagulate
The bypass structure of pump A is born water, and frequency converter is provided with condensate pump B so that condensate pump B is VFC mode.
Wherein condensate pump A is identical with water pump B structure, and using Drawing-Core structure, pump casing design helps vacuum type, stream
Measure and be:1426.6 t/h, discharge pressure:3.308 MPa.
Recycling control valve is revised as condensate minimum flow regulating valve door A, arranges on minimum flow regulating valve door A
Monitoring device, when condensing water flow is less than desired minimum discharge 500t/h, by minimum flow regulating valve adjusts condensate
Backwater to condenser, to meet the minimum discharge of condensate pump service requirement.
It is provided with deaerator level control valve door and automatically adjusts device so that deaerator level maintains set-point
The requirement of 2000mm.
In work, on the premise of the requirement such as condensate system pressure, flow is met, deaerator level control valve standard-sized sheet,
The loss of damming of deaerator level control valve is reduced, energy-saving purpose is reached, is to meet power conservation requirement, in condenser inlet-pressure
Power is more than 1.0 MPa, and condensate main-piping pressure is more than a certain minimum lower limit value, and minimum lower limit value is 1.4 MPa.
After condensate pump B Frequency Conversion Modifications, deaerator level is completed by Condensate Pump Frequency Conversion speed governing.
Under Condensate Pump Frequency Conversion running status, the pid parameter of deaerator level automatic regulating system is adjusted, make
Possess the good water level for automatically adjusting quality, meeting in the case of unit increasing and decreasing load, working conditions change, definite value disturbance 100mm
Static deviation is less than ± 20mm, the index of quality of the stabilization time less than 20min.
Under Condensate Pump Frequency Conversion running status, feed forward function is provided with to deaerator level automatic regulating system, is condensed
Pump variable frequency device is provided with acceptor device, and for receiving a feedforward tach signal, this feedforward rotating speed is tried by early stage
Experience acquirement is tested, is a functional relation of same unit load.
Under variable frequency pump B ruuning situations, test when condensate pump or converter plant trip, to condensate pump and oxygen-eliminating device
The automatic switching function of water level pitch is checked that the automatic switching function of deaerator level pitch is：When condensate pump or change
When frequency device trips, deaerator level pitch automatically switches to certain aperture, and this open position is taken by pre-stage test experience
, it is a functional relation of same unit load；Automatically connection is opened for condensate pump A time delays, this delay time be in order to ensure
After deaerator level pitch action has a time, to guarantee that deaerator level does not occur fluctuation, it is ensured that condensate pump or
Converter plant tripping operation breaking, when general pump A has joined, deaerator level is in controllable state.
When unit is when compared with underload, to prevent the low situation of condensate main-piping pressure from occurring, increase auxiliary in control logic
Regulation logic is helped, to ensure that condensate main-piping pressure meets the needs more than 1.2MPa.
To guarantee main-piping pressure more than the definite value, pressure divergence regulatory function is increased in logic.When condensate main-piping pressure
During less than 1.2 MPa, increase a tachometer value amplified in proportion with deviation automatically in frequency converter rotating speed control instruction, make
Condensate pump rotating speed increases, to increase condensate main-piping pressure so as to meet system requirements.Return in condensate main-piping pressure
During 1.53 MPa, this function is released.To ensure the reliability of condensate main-piping pressure signal, increase by two pressure transmitters.
Auxiliary adjustment logic module is provided with logic and increased rotating speed bias capability, and operations staff can be according to actual motion
Need, increase manually in rotating speed automatic adjustment circuit, subtract tachometer value, rotating speed increases and decreases scope ± 500 turn, after variable frequency pump tripping operation, work
The control logic of frequency pump interlocked startup is realized, after variable frequency pump fault trip, for prevent general pump immediately interlocked startup to oxygen-eliminating device
Water level disturbance is excessive, and interlocking switching deaerator level pitch command signal is sent after 5 S, and general pump re-interlocking starts, and works as frequency conversion
During pump operation, if condensate main-piping pressure is less than 1.1 MPa, logic positive locking power frequency pump startup treats condensate main-piping pressure
When returning to 1.8 more than MPa, manually operated stopping frequency conversion pump operation is that general pump can be reliable when ensureing variable frequency pump longtime running
It is standby, need periodically to start general pump isolated operation.For this purpose, increased in logic automatically switch between variable frequency pump and general pump
Blocking function.After automatic switching function is released, artificial manual switching can be carried out.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalent structure made using the utility model specification and accompanying drawing content or equivalent flow conversion, or be directly or indirectly used in
Other related technical fields, are included in the same manner in scope of patent protection of the present utility model.
Claims (1)
1. a kind of Condensate Pump Frequency Conversion automatic control system, it is characterised in that including condensate pump A and condensate pump B, wherein coagulating
Pump A is born water using industrial frequency control mode, condensate pump B is set to the bypass structure of condensate pump A, and on condensate pump B
It is provided with frequency converter so that condensate pump B is VFC mode, wherein condensate pump A is identical with water pump B structure, adopts
Drawing-Core structure, pump casing design is used to help vacuum type, recycling control valve is revised as condensate minimum flow regulating valve door A,
Monitoring device is provided with minimum flow regulating valve door A, when condensing water flow is less than desired minimum discharge 500t/h, by
Minimum flow regulating valve adjusts coagulation hydroenergy backwater to condenser, to meet the minimum discharge of condensate pump service requirement, in deoxygenation
It is provided with device water level regulation valve and automatically adjusts device so that deaerator level maintains the requirement of set-point 2000mm, is full
Sufficient power conservation requirement, in condenser inlet pressure 1.0 MPa are more than, and condensate main-piping pressure is more than a certain minimum lower limit value, minimum
Lower limit value is 1.4 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620693632.5U CN206111506U (en) | 2016-07-05 | 2016-07-05 | Condensate pump frequency conversion automatic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620693632.5U CN206111506U (en) | 2016-07-05 | 2016-07-05 | Condensate pump frequency conversion automatic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206111506U true CN206111506U (en) | 2017-04-19 |
Family
ID=58510720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620693632.5U Expired - Fee Related CN206111506U (en) | 2016-07-05 | 2016-07-05 | Condensate pump frequency conversion automatic control system |
Country Status (1)
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740761A (en) * | 2017-10-17 | 2018-02-27 | 通辽霍林河坑口发电有限责任公司 | Feed water method for controlling pump and water supply system |
| CN110207014A (en) * | 2019-06-05 | 2019-09-06 | 大唐郓城发电有限公司 | A kind of protection system and operating method preventing condensate pump entrance superpressure |
| 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 |
| CN110925732A (en) * | 2018-09-20 | 2020-03-27 | 中电行唐生物质能热电有限公司 | Agriculture and forestry biomass water-cooling vibration grate boiler combined heat and power generation unit small-capacity hot well and deaerator water level combined control strategy and device |
| CN111694380A (en) * | 2020-06-18 | 2020-09-22 | 西安热工研究院有限公司 | Efficient and energy-saving water level control method for self-adaptive deaerator |
| CN113031681A (en) * | 2021-03-03 | 2021-06-25 | 江苏南通发电有限公司 | Condensation depth frequency conversion optimization method for thermal generator set |
| CN113405088A (en) * | 2021-04-20 | 2021-09-17 | 嘉峪关宏晟电热有限责任公司 | Three-impulse frequency conversion automatic adjusting method |
| CN113464924A (en) * | 2021-07-27 | 2021-10-01 | 山西沃能化工科技有限公司 | Method for improving stability of boiler feed water |
| 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 |
| CN114110557A (en) * | 2021-11-26 | 2022-03-01 | 河北大唐国际唐山北郊热电有限责任公司 | Automatic liquid level adjusting system and method for deaerator |
| CN114233615A (en) * | 2022-01-06 | 2022-03-25 | 国家能源集团国源电力有限公司 | Condensate pump switching control method and device, electronic equipment and storage medium |
| 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 |
-
2016
- 2016-07-05 CN CN201620693632.5U patent/CN206111506U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740761A (en) * | 2017-10-17 | 2018-02-27 | 通辽霍林河坑口发电有限责任公司 | Feed water method for controlling pump and water supply system |
| CN110925732A (en) * | 2018-09-20 | 2020-03-27 | 中电行唐生物质能热电有限公司 | Agriculture and forestry biomass water-cooling vibration grate boiler combined heat and power generation unit small-capacity hot well and deaerator water level combined control strategy and device |
| CN110207014A (en) * | 2019-06-05 | 2019-09-06 | 大唐郓城发电有限公司 | A kind of protection system and operating method preventing condensate pump entrance superpressure |
| CN110207014B (en) * | 2019-06-05 | 2020-09-01 | 大唐郓城发电有限公司 | Protection system for preventing overpressure at inlet of condensate pump and operation method |
| 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 |
| CN111694380A (en) * | 2020-06-18 | 2020-09-22 | 西安热工研究院有限公司 | Efficient and energy-saving water level control method for self-adaptive deaerator |
| CN113031681B (en) * | 2021-03-03 | 2022-04-15 | 江苏南通发电有限公司 | Condensation depth frequency conversion optimization method for thermal generator set |
| CN113031681A (en) * | 2021-03-03 | 2021-06-25 | 江苏南通发电有限公司 | Condensation depth frequency conversion optimization method for thermal generator set |
| CN113405088A (en) * | 2021-04-20 | 2021-09-17 | 嘉峪关宏晟电热有限责任公司 | Three-impulse frequency conversion automatic adjusting method |
| CN113464924A (en) * | 2021-07-27 | 2021-10-01 | 山西沃能化工科技有限公司 | Method for improving stability of boiler feed water |
| 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 |
| 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 |
| CN114110557A (en) * | 2021-11-26 | 2022-03-01 | 河北大唐国际唐山北郊热电有限责任公司 | Automatic liquid level adjusting system and method for deaerator |
| CN114110557B (en) * | 2021-11-26 | 2024-03-08 | 河北大唐国际唐山北郊热电有限责任公司 | Automatic liquid level adjusting system and method for deaerator |
| 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 |
| CN114233615A (en) * | 2022-01-06 | 2022-03-25 | 国家能源集团国源电力有限公司 | Condensate pump switching control method and device, electronic equipment and storage medium |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |