CN205117755U - Electronic pump variable frequency economizer system that gives of thermal power plant - Google Patents
Electronic pump variable frequency economizer system that gives of thermal power plant Download PDFInfo
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- CN205117755U CN205117755U CN201520916643.0U CN201520916643U CN205117755U CN 205117755 U CN205117755 U CN 205117755U CN 201520916643 U CN201520916643 U CN 201520916643U CN 205117755 U CN205117755 U CN 205117755U
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- frequency variator
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Abstract
The utility model discloses an electronic pump variable frequency economizer system that gives of thermal power plant, including cubical switchboard, converter, motor, gear box, water -feeding pump, central controller, central controller issues the output parameter instruction to the converter, and the cubical switchboard provides the input power to the converter, and by the operation of converter actuating motor, the motor passes through the rotor shaft and drives the gear box rotation, and the gear box is with despin to suitable proportion to convey the water -feeding pump, thereby adjust the output of water -feeding pump. The utility model discloses can improve water -feeding pump under the different variation in load condition operating efficiency and to the regulation precision of boiler water supply, reduce the power consumption of system, the life of extension motor.
Description
Technical field
The utility model belongs to field of energy-saving technology, particularly, relates to a kind of thermal power plant electrically driven feedpump frequency conversion energy-saving system.
Background technique
Thermal power plant is in operation and needs will to be had uniform temperature by feed water pump in oxygen-eliminating device water storage box, flow to boiler, to meet the needs of boiler feed water except the feedwater of peroxide.Current Power Plant Feedwater pumping system is made up of interconnected cage motor, hydraulic couplers and feed water pump, when load variations, the running speed of feed water pump is changed by the scoop tube aperture adjusting hydraulic couplers, thus control the water flow being supplied to boiler, but the efficiency of hydraulic couplers becomes once linear relationship with rotating speed, along with the decline of rotating speed, efficiency also can reduce, and causes the power consumption of water pump higher.
Frequency variator has experienced the development of more than 40 year, has widely used in European and American developed countries, also carried out application at present in the industry such as air-conditioning, elevator, metallurgy, machinery, electronics, petrochemical industry, papermaking, weaving of China since coming out from 1964.Frequency control of motor speed is at tuning range; static accuracy, dynamic quality, system effectiveness, perfect protective function, easily the realization automatically aspects such as control and process control are that hydraulic couplers speed governing is incomparable; it has been generally acknowledged Wechselstrommotor the most promising the most desirable speed-regulating scheme, represents the developing direction of Electrified Transmission from now on.
Model utility content
The utility model overcomes the deficiency that prior art exists, and technical problem to be solved is: provide a kind of thermal power plant electrically driven feedpump frequency conversion energy-saving system.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of thermal power plant electrically driven feedpump frequency conversion energy-saving system, comprises switch cubicle, frequency variator, motor, gear-box, feed water pump, SC system controller.
Described frequency variator is made up of rectifier and inverter two-part, and rectifier adopts high-voltage diode element, and inverter adopts IGBT element; Described frequency variator adopts has unit bypass function, and power cell adopts central point drift control technique; Described frequency variator adopts vector control technology, cooling by water mode, can carry out soft start and soft stop only control to motor.
Described motor adopts asynchronous motor, and its stator load voltage value is not less than the magnitude of voltage that frequency variator exports.
Described gear-box adopts DRUHITTurbo series, and gear up is than being determined by motor speed and speed of feedwater.
Described feed water pump is made up of main pump and front-mounted pump, and main pump adopts horizontal multi-stage centrifugal pump, and front-mounted pump adopts horizontal single-stage double-suction centrifugal pump.
Described SC system controller is made up of PLC element, has the size that automatically can detect also calculated load amount and the function in good time adjusting frequency variator, motor and feed water pump operation curve.
The beneficial effect that the utility model compared with prior art has is:
One, the utility model can improve under different load situation of change, especially the efficiency of feed water pump in the low-load situation at night, overcomes formerly to regulate by hydraulic couplers the defect that brought efficiency is on the low side and power consumption is large.
Two, the utility model can improve the degree of regulation to boiler water supply, and adopts soft start and stopping technology, can extend motor working life, does not have stoste mechanical couple and to throw switch at a high speed phenomenon.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of thermal power plant of the utility model electrically driven feedpump frequency conversion energy-saving system, comprises switch cubicle, frequency variator, motor, gear-box, feed water pump, SC system controller; Above-mentioned switch cubicle is connected by the three-phase input end of elastic cable paper with frequency variator, the output of frequency variator is connected to the stator input of motor by cable, motor is connected with gear-box by rotor of output shaft axle, and the gear output shaft of gear-box connects with the rotor shaft of feed water pump; The controller of above-mentioned frequency variator connects by controlling cable homologous ray controller.
Described frequency variator is made up of rectifier and inverter two-part, and rectifier adopts high-voltage diode element, and inverter adopts IGBT element; Described frequency variator adopts has unit bypass function, and power cell adopts central point drift control technique; Described frequency variator adopts vector control technology, has to carry out soft start to motor and soft stop stops controlling functions, cooling by water mode.
Described motor adopts asynchronous motor, and its stator load voltage value is not less than the magnitude of voltage that frequency variator exports.
Described gear-box adopts DRUHITTurbo series, and gear up is than being determined by motor speed and speed of feedwater.
Described feed water pump is made up of main pump and front-mounted pump, and main pump adopts horizontal multi-stage centrifugal pump, and front-mounted pump adopts horizontal single-stage double-suction centrifugal pump.
Described SC system controller is made up of PLC element, has the size that automatically can detect also calculated load amount and the function in good time adjusting frequency variator, motor and feed water pump operation curve.
The working procedure of this example: above-mentioned all parts forms in fact thermal power plant's electrically driven feedpump frequency conversion energy-saving system, under normal circumstances, SC system controller issues output order to frequency variator, switch cubicle provides input power to frequency variator, by transducer drive motor running, motor is rotated by rotor shaft driven gear case, and rotating speed is reduced to suitable ratio by gear-box, and be sent to feed water pump, thus regulate the water output of feed water pump.
Advantage of the present utility model: can improve under different load situation of change, the especially efficiency of feed water pump in the low-load situation at night, overcome and formerly regulate by hydraulic couplers the defect that brought efficiency is on the low side and power consumption is large; The degree of regulation to boiler water supply can be improved, and adopt soft start and stopping technology, motor working life can be extended, not there is stoste mechanical couple and to throw switch at a high speed phenomenon.
Finally should be noted that; above content is only in order to illustrate the technical solution of the utility model; but not the restriction to the utility model protection domain; the simple modification that those of ordinary skill in the art carries out the technical solution of the utility model or equivalently to replace, does not all depart from essence and the scope of technical solutions of the utility model.
Claims (5)
1. thermal power plant's electrically driven feedpump frequency conversion energy-saving system, is characterized in that: comprise switch cubicle, frequency variator, motor, gear-box, feed water pump, SC system controller; Above-mentioned switch cubicle is connected by the three-phase input end of elastic cable paper with frequency variator, the output of frequency variator is connected to the stator input of motor by cable, motor is connected with gear-box by rotor of output shaft axle, and the gear output shaft of gear-box connects with the rotor shaft of feed water pump; The controller of above-mentioned frequency variator connects by controlling cable homologous ray controller.
2. a kind of thermal power plant according to claim 1 electrically driven feedpump frequency conversion energy-saving system, is characterized in that: described frequency variator is made up of rectifier and inverter two-part, and rectifier adopts high-voltage diode element, and inverter adopts IGBT element; Described frequency variator adopts has unit bypass function, and power cell adopts central point drift control technique; Described frequency variator adopts vector control technology, has to carry out soft start to motor and soft stop stops controlling functions, cooling by water mode.
3. a kind of switchgear room intelligent data acquisition management system according to claim 1, it is characterized in that: described SC system controller is made up of PLC element that there is the size that automatically can detect also calculated load amount and the function in good time adjusting frequency variator, motor and feed water pump operation curve.
4. a kind of thermal power plant according to claim 1 electrically driven feedpump frequency conversion energy-saving system, is characterized in that: described gear-box adopts DRUHITTurbo series, and gear up is than being determined by motor speed and speed of feedwater.
5. a kind of thermal power plant according to claim 1 electrically driven feedpump frequency conversion energy-saving system, is characterized in that: described feed water pump is made up of main pump and front-mounted pump, and main pump adopts horizontal multi-stage centrifugal pump, and front-mounted pump adopts horizontal single-stage double-suction centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520916643.0U CN205117755U (en) | 2015-11-18 | 2015-11-18 | Electronic pump variable frequency economizer system that gives of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520916643.0U CN205117755U (en) | 2015-11-18 | 2015-11-18 | Electronic pump variable frequency economizer system that gives of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205117755U true CN205117755U (en) | 2016-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520916643.0U Expired - Fee Related CN205117755U (en) | 2015-11-18 | 2015-11-18 | Electronic pump variable frequency economizer system that gives of thermal power plant |
Country Status (1)
| Country | Link |
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| CN (1) | CN205117755U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150964A (en) * | 2016-08-25 | 2016-11-23 | 俞朝富 | The electrically driven feed pump system of electrically driven feed pump subsystem and composition thereof |
| CN106194640A (en) * | 2016-08-25 | 2016-12-07 | 俞朝富 | Boiler feed pump subsystem that pot-motor directly drives and the boiler feedwater pumping system of composition thereof |
| CN106704211A (en) * | 2015-11-18 | 2017-05-24 | 亿海天成(北京)科技有限公司 | Frequency change and energy conservation system of thermal power plant electric water feeding pump |
-
2015
- 2015-11-18 CN CN201520916643.0U patent/CN205117755U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704211A (en) * | 2015-11-18 | 2017-05-24 | 亿海天成(北京)科技有限公司 | Frequency change and energy conservation system of thermal power plant electric water feeding pump |
| CN106150964A (en) * | 2016-08-25 | 2016-11-23 | 俞朝富 | The electrically driven feed pump system of electrically driven feed pump subsystem and composition thereof |
| CN106194640A (en) * | 2016-08-25 | 2016-12-07 | 俞朝富 | Boiler feed pump subsystem that pot-motor directly drives and the boiler feedwater pumping system of composition thereof |
| WO2018036411A1 (en) * | 2016-08-25 | 2018-03-01 | 俞朝富 | Electrically-driven water feed pump subsystem and electrically-driven water feed pump system formed by same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20161118 |