CN203023017U - Work-conversion frequency dual-purpose hydraulic coupler electric water feeding pump frequency conversion one-driving-two energy saving system - Google Patents
Work-conversion frequency dual-purpose hydraulic coupler electric water feeding pump frequency conversion one-driving-two energy saving system Download PDFInfo
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- CN203023017U CN203023017U CN 201220608449 CN201220608449U CN203023017U CN 203023017 U CN203023017 U CN 203023017U CN 201220608449 CN201220608449 CN 201220608449 CN 201220608449 U CN201220608449 U CN 201220608449U CN 203023017 U CN203023017 U CN 203023017U
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Abstract
The utility model belongs to the energy-saving technical field of an electric water feeding pump group of a thermal plant and aims to provide a work-conversion frequency dual-purpose hydraulic coupler electric water feeding pump frequency conversion one-driving-two energy saving system used for mutual switch of work and conversion frequencies of two groups of water feeding pumps. According to the utility model, a NO.1 frequency conversion input end separation disconnecting link and a NO.2 frequency conversion input end separation disconnecting link are connected at output ends of a NO.1 power supply circuit breaker of the NO.1 water feeding pump group and a NO.2 power supply circuit breaker of the NO.2 water feeding pump group in parallel, and an output end of a frequency converter connected between the NO.1 frequency conversion input end separation disconnecting link and the NO.2 frequency conversion input end separation disconnecting link, and output ends of a NO.1 work frequency bypass separation disconnecting link and a NO.2 work frequency bypass separation disconnecting link are connected to motors of the NO.1 and NO.2 water feeding pump groups in parallel by a NO.1 frequency conversion output end separation disconnecting link and a NO.2 frequency conversion output end separation disconnecting link respectively. The work-conversion frequency dual-purpose hydraulic coupler electric water feeding pump frequency conversion one-driving-two energy saving system is simple in structure and reasonable in design and has a broad application prospect.
Description
Technical field
The utility model belongs to the field of energy-saving technology of thermal power plant's electrically driven feedpump group.
Background technique
Thermal power plant's electrically driven feedpump mostly is speed regulation type hydrodynamic coupler and drives and speed governing, and speed regulation type hydrodynamic coupler, all adopt the volumetric speed control method both at home and abroad.The efficient of speed regulation type hydrodynamic coupler equals the ratio of secondary speed and pump impeller rotating speed all the time.The speed regulation type hydrodynamic coupler optimal working point is its declared working condition point, and this operating point output power is the highest, and output speed is the highest, and efficient is also the highest.Speed regulation type hydrodynamic coupler only is only the highest in the declared working condition operational efficiency.More the multiple-effect rate is lower to depart from declared working condition, and this is maximum drawback and the shortcoming of speed regulation type hydrodynamic coupler.
When pressing the design of Power Station Design technical specification, the boiler evaporation capacity is chosen 105% of steam turbine set maximum continuous rating air inflow usually, the feed water pump peak rate of flow is chosen 105%～110% of boiler maximum continuous rating, and the feed water pump peak rate of flow pressed by hydraulic couplers and maximum speed is equipped with.So, even if unit rated load operation, the hydraulic couplers running speed is than maximum (top) speed value low 10%～15%, in-service coal group of motors is in service, because network load needs, the coal group of motors will participate in peak regulation, Rate of load condensate is through the operation between 65～75% of being everlasting, speed regulation type hydrodynamic coupler scoop tube aperture is through being everlasting 60～65%, this operating conditions is the larger operating mode of hydraulic couplers loss, often follows the improper rising of working oil temperature, is obviously uneconomic, under this method of operation, its economize on electricity Spatial General 6 R is more than 20%.
Summary of the invention
The purpose of this utility model be to provide a kind of two groups of feed water pumps can power frequency, the dual-purpose hydraulic couplers electrically driven feedpump of the work frequency conversion frequency conversion one drag two energy conserving system that switches mutually of frequency conversion.
the utility model is at a power circuit breaker of a feed water pump group and No. two a power circuit breaker output terminals frequency conversion input end isolation switch in parallel and No. two frequency conversion input end isolation switch of No. two feed water pump groups, connect frequency variator between a frequency conversion input end isolation switch and No. two frequency conversion input end isolation switch, inverter output terminal is connected in parallel to respectively the motor of a feed water pump group and No. two feed water pump groups by frequency conversion output terminal isolation switch and No. two frequency conversion output terminal isolation switch with power frequency bypass isolation switch and No. two power frequency bypass isolation switch output terminals, the hydraulic couplers of a feed water pump group and No. two feed water pump groups is the dual-purpose hydraulic couplers of work frequency conversion.
The utility model front-mounted pump is for decide the dual-purpose front-mounted pump of speed change, namely during the feed water pump power frequency operation, and the operation of front-mounted pump constant speed, front-mounted pump variable-speed operation when the feed water pump frequency control of motor speed moves.
the utility model is on former 2 * 100% capacity electrically driven feedpump group Placements constant bases, between two feed water pump motor power circuit breakers and motor, configure a frequency variator and power frequency bypass thereof, by switching, the work variable-frequency power sources is inputed to motor, motor one end Driven by Coaxial front-mounted pump, the other end Driven by Coaxial hydraulic couplers input shaft, the hydraulic couplers output shaft drives feed water pump, use hydraulic couplers pump opinion speed regulation method, hydraulic couplers is transformed into work frequency conversion dual-purpose multifunctional hydraulic couplers, make same hydraulic couplers have the dual-purpose mode of work frequency conversion, speed regulation type hydrodynamic coupler mode when being power frequency operation, step-up gear mode during converting operation, the two kinds of method of operation one fortune one are standby, the standby dual-purpose hydraulic couplers electrically driven feedpump of work frequency conversion frequency conversion one drag two energy conserving system each other.
The utility model is simple in structure, and is reasonable in design, and the dual-purpose hydraulic couplers electrically driven feedpump of this work frequency conversion frequency conversion one drag two energy conserving system will have wide application prospects.Because its overall efficiency is high, have work frequency conversion double-purpose functional, safe and reliable, convenient, flexible, can be used for the comprehensive upgrading of energy-saving and frequency-variable of the in-service coal group of motors of 200MW electrically driven feedpump group.After transformation, 75% Rate of load condensate is moved 20% left and right of generally can economizing on electricity, and auxiliary power consumption rate of power plant generally can reduce by 0. 5 percentage points, and net coal consumption rate generally can reduce 1.5g/kwh.
Description of drawings
Fig. 1 is the utility model structural representation, in figure, 1 is front-mounted pump, the 2nd, motor, the 3rd, hydraulic couplers, the 4th, feed water pump, the 5th, frequency variator, 6 is power circuit breakers, 7 is No. two power circuit breakers, 61 is power frequency bypass isolation switch, 62 is frequency conversion input end isolation switch, 63 is frequency conversion output terminal isolation switch, 71 is No. two power frequency bypass isolation switch, 72 is No. two frequency conversion input end isolation switch, 73 is No. two frequency conversion output terminal isolation switch, 9 is electrically driven feedpump groups, 10 is No. two electrically driven feedpump units.
Embodiment
the utility model is at a power circuit breaker 6 of a feed water pump group 9 and No. two power circuit breakers 7 an output terminals frequency conversion input end isolation switch 62 in parallel and No. two frequency conversion input end isolation switch 72 of No. two feed water pump groups 10, connect frequency variator 5 between a frequency conversion input end isolation switch 62 and No. two frequency conversion input end isolation switch 72, frequency variator 5 output terminals are connected in parallel to respectively the motor of a feed water pump group 9 and No. two feed water pump groups 10 by frequency conversion output terminal isolation switch 63 and No. two frequency conversion output terminal isolation switch 73 with power frequency bypass isolation switch 61 and No. two power frequency bypass isolation switch 71 output terminals, the hydraulic couplers of a feed water pump group 9 and No. two feed water pump groups 10 is the dual-purpose hydraulic couplers of work frequency conversion.
The utility model front-mounted pump 1 is for decide the dual-purpose front-mounted pump of speed change, namely during the feed water pump power frequency operation, and the operation of front-mounted pump constant speed, front-mounted pump variable-speed operation when the feed water pump frequency control of motor speed moves.
the utility model is on former 2 * 100% capacity electrically driven feedpump group Placements constant bases, between two feed water pump motor power circuit breakers and motor, configure a frequency variator and power frequency bypass thereof, by switching, the work variable-frequency power sources is inputed to motor, motor one end Driven by Coaxial front-mounted pump, the other end Driven by Coaxial hydraulic couplers input shaft, the hydraulic couplers output shaft drives feed water pump, use hydraulic couplers pump opinion speed regulation method, hydraulic couplers is transformed into work frequency conversion dual-purpose multifunctional hydraulic couplers, make same hydraulic couplers have the dual-purpose mode of work frequency conversion, speed regulation type hydrodynamic coupler mode when being power frequency operation, step-up gear mode during converting operation, the two kinds of method of operation one fortune one are standby, the standby dual-purpose hydraulic couplers electrically driven feedpump of work frequency conversion frequency conversion one drag two energy conserving system each other.
The utility model is transformed into the electrically driven feedpump group of the dual-purpose hydraulic couplers driving of work frequency conversion with the electrically driven feedpump group that drives by hydraulic couplers of power frequency constant speed input.
Converting operation step-up gear mode, its overall efficiency equals frequency variator efficient and the hydraulic couplers peak efficiency is long-pending, overall efficiency when output speed is identical and power frequency operation speed regulation type hydrodynamic coupler mode efficient poor, it is namely power saving rate, Rate of load condensate is when 65～75% operation, and power saving rate is generally more than 20%.
The utility model need to be with the front-mounted pump of motor Driven by Coaxial, but changes both constant speed operations into, again the front-mounted pump of variable speed operation.
The utility model is applicable to the energy-conservation upgrading of the dual-purpose frequency conversion one drag two of electrically driven feedpump group work frequency conversion that power station 200MW coal group of motors hydraulic couplers drives.
Claims (3)
1. the dual-purpose hydraulic couplers electrically driven feedpump of work frequency conversion frequency conversion one drag two energy conserving system, it is characterized in that: at a power circuit breaker (6) of a feed water pump group (9) and No. two power circuit breakers (a 7) output terminal frequency conversion input end isolation switch (62) in parallel and No. two frequency conversion input end isolation switch (72) of No. two feed water pump groups (10), connect frequency variator (5) between a frequency conversion input end isolation switch (62) and No. two frequency conversion input end isolation switch (72), frequency variator (5) output terminal is connected in parallel to respectively the motor of a feed water pump group (9) and No. two feed water pump groups (10) by a frequency conversion output terminal isolation switch (63) and No. two frequency conversion output terminal isolation switch (73) with a power frequency bypass isolation switch (61) and No. two power frequency bypass isolation switch (71) output terminal, the hydraulic couplers of a feed water pump group (9) and No. two feed water pump groups (10) is the dual-purpose hydraulic couplers of work frequency conversion.
2. the dual-purpose hydraulic couplers electrically driven feedpump of work frequency conversion according to claim 1 frequency conversion one drag two energy conserving system, it is characterized in that: front-mounted pump (1) is for deciding the dual-purpose front-mounted pump of speed change, when being the feed water pump power frequency operation, the operation of front-mounted pump constant speed, front-mounted pump variable-speed operation during feed water pump frequency control of motor speed operation.
3. the dual-purpose hydraulic couplers electrically driven feedpump of work frequency conversion according to claim 1 frequency conversion one drag two energy conserving system, it is characterized in that: on former 2 * 100% capacity electrically driven feedpump group Placements constant bases, between two feed water pump motor power circuit breakers and motor, configure a frequency variator and power frequency bypass thereof, by switching, the work variable-frequency power sources is inputed to motor, motor one end Driven by Coaxial front-mounted pump, the other end Driven by Coaxial hydraulic couplers input shaft, the hydraulic couplers output shaft drives feed water pump, use hydraulic couplers pump opinion speed regulation method, make same hydraulic couplers have the dual-purpose mode of work frequency conversion, speed regulation type hydrodynamic coupler mode when being power frequency operation, step-up gear mode during converting operation, the two kinds of method of operation one fortune one are standby, the standby dual-purpose hydraulic couplers electrically driven feedpump of work frequency conversion frequency conversion one drag two energy conserving system each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220608449 CN203023017U (en) | 2012-11-19 | 2012-11-19 | Work-conversion frequency dual-purpose hydraulic coupler electric water feeding pump frequency conversion one-driving-two energy saving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220608449 CN203023017U (en) | 2012-11-19 | 2012-11-19 | Work-conversion frequency dual-purpose hydraulic coupler electric water feeding pump frequency conversion one-driving-two energy saving system |
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| Publication Number | Publication Date |
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| CN203023017U true CN203023017U (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220608449 Expired - Fee Related CN203023017U (en) | 2012-11-19 | 2012-11-19 | Work-conversion frequency dual-purpose hydraulic coupler electric water feeding pump frequency conversion one-driving-two energy saving system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405612A (en) * | 2014-11-14 | 2015-03-11 | 神华集团有限责任公司 | Boiler and feed pump system thereof |
| CN105114939A (en) * | 2015-04-29 | 2015-12-02 | 大唐桂冠合山发电有限公司 | Feedwater regulating system used for boiler in heat-engine plant |
| CN111503620A (en) * | 2020-03-27 | 2020-08-07 | 扬州第二发电有限责任公司 | Water supply whole-course control system suitable for deep peak shaving of coal-fired unit |
-
2012
- 2012-11-19 CN CN 201220608449 patent/CN203023017U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405612A (en) * | 2014-11-14 | 2015-03-11 | 神华集团有限责任公司 | Boiler and feed pump system thereof |
| CN105114939A (en) * | 2015-04-29 | 2015-12-02 | 大唐桂冠合山发电有限公司 | Feedwater regulating system used for boiler in heat-engine plant |
| CN105114939B (en) * | 2015-04-29 | 2017-07-21 | 大唐桂冠合山发电有限公司 | A kind of Feed Water Regulation System for power plant boiler |
| CN111503620A (en) * | 2020-03-27 | 2020-08-07 | 扬州第二发电有限责任公司 | Water supply whole-course control system suitable for deep peak shaving of coal-fired unit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20181119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |