CN2535835Y - Circulation-water automatic control device for generating plant - Google Patents
Circulation-water automatic control device for generating plant Download PDFInfo
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- CN2535835Y CN2535835Y CN 02219127 CN02219127U CN2535835Y CN 2535835 Y CN2535835 Y CN 2535835Y CN 02219127 CN02219127 CN 02219127 CN 02219127 U CN02219127 U CN 02219127U CN 2535835 Y CN2535835 Y CN 2535835Y
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- electric power
- controller
- frequency converter
- input end
- power controller
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Abstract
A circulated water automatic control device of generating plant belongs to circulated water automatic control devices, which comprises an electric power controller. The input end of the electric power controller is connected with a sensing device which is further connected with the condensed water outflow tube of a steam condenser, and the output end of the electric power controller is connected with a circulated cooling water pump. The electric power controller is composed of a frequency converter, a disconnecting switch, a vacuum switch, and a controller, wherein the frequency converter is connected with a power supply via the disconnecting switch, the control input end of the frequency converter is connected with the output end of the controller, the input end of the controller is the input end of the electric power controller, and the output end of the frequency converter is connected with a water pump motor via the vacuum switch. The utility model realizes continuous control, improves the control accuracy, increases the energy-saving ratio by one to three folds, reduces the cost of electric power production, saves valued water resource, and simultaneously reduces the investment cost of chemical agent, reduces environment pollution, and extends the service life and the maintenance period of the circulated cooling water pump.
Description
Technical field
The utility model relates to a kind of recirculated water self-con-tained unit, particularly a kind of generating plant circulation-water self-con-tained unit.
Background technology
At present, the fuel-burning power plant is to the control of the recirculated cooling water in when generating, generally be to adopt the most advanced variable-frequence governor Control Circulation cooling-water pump, for 6kv higher level recirculated cooling water pump, be manually frequency converter to be carried out frequency setting, and be when big variation takes place factors such as environment temperature, just to regulate.When big, carry out stage adjusting as temperature difference such as winter and summers.Adopt the surplus of this regulative mode recirculated water still very big, as fine and cloudy, when factors such as noon and morning and generation load fluctuation change, do not adjust accordingly, its frequency setting lower limit need satisfy also that environment temperature is the highest, load is maximum, add the frequency in the time of can predicting surplus, this kind control mode is empirical manual control, and energy-saving effect is not obvious.
Summary of the invention
The purpose of this utility model is to provide a kind of energy-saving effect tangible generating plant circulation-water self-con-tained unit.
The purpose of this utility model is achieved in that this self-con-tained unit has an electric power controller, and the input end of electric power controller is connected with sensor; Output terminal is connected with the recirculated cooling water pump.
Electric power controller is made up of frequency converter, disconnector, vacuum switch, controller, frequency converter is connected with power supply by disconnector, the control input end of frequency converter is connected with the output terminal of controller, the input end of controller is the input end of electric power controller, and the output terminal of frequency converter is connected with pump motor by vacuum switch.
Sensor is connected on the condensate water rising pipe of condenser.
Frequency converter also is connected with audible-visual annunciator.
Beneficial effect: owing to having adopted such scheme, recirculated water self-con-tained unit is to adopt the parameter that detects certain reference mark, controls motor (pump) rotating speed by sensor, controller, frequency converter and realizes what flow was controlled immediately.As to control the condensate water outlet temperature be certain value, carries out the subtle change that per second detects the temperature that conforms, load (discharge capacity) for several times and make the recirculated cooling water amount do corresponding the variation.Realization is the control of unit with the second, makes power savings maximum, quantity of circulating water minimum (water loss minimum).This interim control has higher economize on electricity, water saving efficiency.The utility model limits the minimum flow of recirculated water, to guarantee the continuous circulation of water.
Control is compared with stage.Bring up to stepless control from stage control, control accuracy height, fractional energy savings can improve 1-3 doubly, have reduced the cost of electrical production, and precious water resource has not only been saved in more water saving.Also reduce simultaneously the input expense and the sewage emissions amount of chemical agent, reduced environmental pollution.The reduction of rotating speed has prolonged the serviceable life and the maintenance interval of pump, has excellent economic and social benefit.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the utility model controller architecture synoptic diagram.
Embodiment
Embodiment: the cooling system of generating plant mainly is made of cooling tower 1, circulation cooling pump 2, condenser 6, condensate water outlet etc.Water inlet is arranged at cooling tower 1 top; Water delivering orifice is arranged at the bottom, the water delivering orifice of cooling tower 1 is connected with condenser pipe 7 in the condenser 6 by circulation cooling pump 2, the other end of condenser pipe 7 is connected with the water inlet of cooling tower 1, the condensate pipe outlet is arranged in the bottom of condenser 6, in the condensate pipe outlet, be connected with condensate water rising pipe 5, on the condensate water rising pipe 5 of condenser 6, be connected with sensor 4, the output terminal of sensor 4 is connected with electric power controller 3, the output terminal of electric power controller 3 is connected with recirculated cooling water pump 2, and recirculated cooling water pump 2 is controlled.
Frequency converter also is connected with audible-visual annunciator.
By disconnector the 6kv power supply is supplied with frequency converter, give the power supply of recirculated cooling water pump motor through vacuum switch by frequency converter output (v/f) electric power.
Supply with controller by sensor 4 detected signals (0-5V or 4-20mA) and after contrasting computing, export the rotating speed that (0-5V or 4-20mA) signal provides correspondent voltage and frequency to regulate motor to motor for frequency converter behind vacuum switch, thereby reach the purpose of regulating quantity of circulating water.
When breaking down, device reports to the police to audible-visual annunciator by frequency converter output signal (0-5V or 4-20mA).Vacuum switch will install and connect standby switch board when breaking away from.
The model of frequency converter is Bulletin1577 in the utility model; The model of disconnector is GN19-10 (C)/40; The model of vacuum switch is ZN28; The model of controller is SR74; The model of audible-visual annunciator is HZX-10; The model of sensor is HMP140.
Claims (4)
1, a kind of generating plant circulation-water self-con-tained unit, it is characterized in that: this self-con-tained unit has an electric power controller, and the input end of electric power controller is connected with sensor; Output terminal is connected with the recirculated cooling water pump.
2, generating plant circulation-water self-con-tained unit according to claim 1, it is characterized in that: electric power controller is made up of frequency converter, disconnector, vacuum switch, controller, frequency converter is connected with power supply by disconnector, the control input end of frequency converter is connected with the output terminal of controller, the input end of controller is the input end of electric power controller, and the output terminal of frequency converter is connected with pump motor by vacuum switch.
3, generating plant circulation-water self-con-tained unit according to claim 1 is characterized in that: sensor is connected on the condensate water rising pipe of condenser.
4, generating plant circulation-water self-con-tained unit according to claim 1, it is characterized in that: frequency converter also is connected with audible-visual annunciator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02219127 CN2535835Y (en) | 2002-03-01 | 2002-03-01 | Circulation-water automatic control device for generating plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02219127 CN2535835Y (en) | 2002-03-01 | 2002-03-01 | Circulation-water automatic control device for generating plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2535835Y true CN2535835Y (en) | 2003-02-12 |
Family
ID=33697657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02219127 Expired - Fee Related CN2535835Y (en) | 2002-03-01 | 2002-03-01 | Circulation-water automatic control device for generating plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2535835Y (en) |
-
2002
- 2002-03-01 CN CN 02219127 patent/CN2535835Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |