CN212057859U - Closed cold water temperature automatic control system - Google Patents
Closed cold water temperature automatic control system Download PDFInfo
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- CN212057859U CN212057859U CN202020875608.XU CN202020875608U CN212057859U CN 212057859 U CN212057859 U CN 212057859U CN 202020875608 U CN202020875608 U CN 202020875608U CN 212057859 U CN212057859 U CN 212057859U
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- cold water
- temperature
- water
- cooling
- control system
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Abstract
An automatic closed cold water temperature control system comprises a cooling unit and at least two closed cold water pumps, wherein the cooling unit is respectively connected with at least two cooling pipelines through the closed cold water pumps; each cooling pipeline is provided with a heat exchanger, the inlet of the heat exchanger is connected with a water inlet pipe, the outlet of the heat exchanger is connected with a water outlet pipe, and the water outlet pipe is provided with an electric temperature regulation outlet valve; the electric temperature regulation outlet valve comprises a control valve, an intelligent actuator and a temperature sensor, wherein the intelligent actuator is electrically connected with the control valve. The utility model discloses a be in advance electric temperature adjusts the outlet valve and adjusts and close cold water temperature, guarantees to close cold water cooling effect. The investment of the heater in winter at low temperature is reduced, the plant power consumption rate is reduced, and the operation amount and labor intensity of operators for locally adjusting the temperature of each cooled device and system are also reduced.
Description
Technical Field
The utility model relates to a temperature automatic control system especially relates to a close cold water temperature automatic control system.
Background
At present, the power reform is developing deeply, each power generation enterprise shifts to a development target taking benefits as a center, and the power generation cost is reduced, power generation equipment is optimized, a power market is strived for, and the power generation cost is the foundation of 'survival and development promotion' of a power plant in the face of a power market form of 'separation of a plant network and surfing on line through competition' and adverse conditions that raw coal is in short supply and the power generation cost is greatly increased.
In the existing power generation equipment, the function of closing cold water is to directly or indirectly take away heat generated by auxiliary equipment of a steam turbine, a boiler and a generator, and ensure normal temperature and safe operation of a motor, a bearing, oil and the like of the auxiliary equipment. The auxiliary cold water for cooling the closed cold water is directly taken from the open circulating water, when the temperature of the open circulating water changes along with the change of the environmental temperature, the temperature of the closed cold water also changes, and the wide change of the temperature and the long-time low temperature are unfavorable for the closed cold water and the equipment and the system for cooling the closed cold water. In the prior art, in the season of lower temperature, the temperature of cooled equipment and a system is improved by arranging an electric heater, although the temperature can be improved, the power consumption is improved, and the method is not an ideal solution.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the system has the advantages that the defects of the prior art are overcome, the closed cold water temperature can be controlled to be at the appropriate temperature through the electric adjusting outlet valve, the investment of a heater in low temperature in winter is reduced, the plant power consumption rate is reduced, the cold-proof and anti-freezing protection effect on equipment is also achieved, and the operation amount and labor intensity of operators for adjusting the temperature of each cooled equipment and the system on site are reduced.
The utility model discloses further solve the technical scheme that its technical problem adopted and be: an automatic closed cold water temperature control system comprises a cooling unit and at least two closed cold water pumps, wherein the cooling unit is respectively connected with at least two cooling pipelines through the closed cold water pumps; each cooling pipeline is provided with a heat exchanger, the inlet of the heat exchanger is connected with a water inlet pipe, the outlet of the heat exchanger is connected with a water outlet pipe, and the water outlet pipe is provided with an electric temperature regulation outlet valve; the electric temperature regulation outlet valve comprises a control valve, an intelligent actuator and a temperature sensor, wherein the intelligent actuator is electrically connected with the control valve.
Furthermore, the electric temperature regulation outlet valve also comprises a temperature regulator electrically connected with the control valve, and the closed cold water cooling effect is ensured by setting the temperature in the temperature regulator in advance.
Furthermore, the heat exchanger is a plate heat exchanger, so that the heat transfer coefficient is high, the structure is compact, and the overhaul field is small.
Furthermore, one of the at least two closed cold water pumps operates in a frequency conversion mode, and the other one is standby at power frequency.
Further, the water outlet pipes of the at least 2 cooling pipelines are connected to the same outlet.
Furthermore, the water inlet pipe is provided with an inlet valve.
Furthermore, the cooling pipeline is also provided with more than 2 drain valves.
Furthermore, the cooling unit comprises any one of a stator water system, a hydrogen cooler, a coal mill lubricating oil system, a blower lubricating oil cooler, a draught fan lubricating oil cooler, a fire-resistant oil cooler and an air preheater bearing.
The utility model has the advantages that:
1. the closed cold water is automatically controlled at a proper operation temperature through the temperature regulator, so that the operation amount and labor intensity of operators for locally regulating the temperature of each cooled device and system are reduced, the investment of a heater at low temperature in winter is reduced, the plant power consumption rate is reduced, and good effects on cold-proof and freeze-proof protection of the device are achieved.
2. The specific impact analysis for the different cooling devices and systems of the cooling unit is as follows:
1) for a fire-resistant oil system, the temperature of fire-resistant oil is stabilized at 42 ℃, a heater of a fire-resistant oil tank does not need to be input, the heater is not input, electric energy is saved, the plant power consumption rate is reduced, the pressure and the temperature of the fire-resistant oil are constant, and the stability of the adjustment performance of the DEH of the unit is facilitated.
2) For the coal mill lubricating oil cooler, the bypass valve of the unit coal mill lubricating oil cooler can be kept closed, the lubricating oil is heated by closing cold water in a reverse mode, the temperature of the coal mill lubricating oil is stable, a heater is prevented from being input, and a good energy-saving effect is achieved.
3) For a stator water system and a hydrogen system, the temperature of stator water and hydrogen is stabilized near a rated value, so that the phenomenon that when the environmental temperature and the load of a unit are changed, a manual isolating valve at the cold water side or a cooling water isolating valve of a hydrogen cooler is manually opened or closed by a small stator water plate cooler is avoided, and the labor intensity of operators is reduced.
4) The oil cooler for the air feeder, the oil cooler for the draught fan, the lubricating oil cooler for the electric water-feeding pump and the working oil cooler for the electric water-feeding pump are the same as those of the lubricating oil cooler for the coal mill, the oil temperature is maintained in a proper range by reversely heating by closing cold water, the oil temperature is improved without a heater, and the oil cooler has good effects on economy and safety.
5) The exciter air cooler, the condensate pump bearing cooler and the air preheater bearing cooler are all prevented from impacting metal parts due to stress changes caused by large changes of cooling water temperature.
Drawings
FIG. 1 is a schematic view of an automatic closed-loop cold water temperature control system;
in the figure: 1-inlet valve, 2-drain valve, 3-temperature sensing device, 4-electric temperature regulation outlet valve, 5-heat exchanger.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1:
the utility model discloses a theory of operation and application method:
an automatic closed cold water temperature control system comprises a cooling unit and at least two closed cold water pumps, wherein the cooling unit is respectively connected with at least two cooling pipelines through the closed cold water pumps; each cooling pipeline is provided with a heat exchanger 5, the inlet of the heat exchanger 5 is connected with a water inlet pipe, the outlet of the heat exchanger 5 is connected with a water outlet pipe, and the water outlet pipe is provided with an electric temperature regulation outlet valve 4; the electric temperature regulation outlet valve 4 comprises a control valve, an intelligent actuator electrically connected with the control valve and a temperature sensor.
In the system, the electric temperature regulation outlet valve 4 further comprises a temperature regulator electrically connected with the control valve, and a technician sets the temperature in the temperature regulator in advance to ensure the cooling effect of the closed cold water.
In a preferred embodiment, the electric temperature regulation outlet valve can adopt a self-operated electric temperature regulation valve of a ZDWPE type.
In the system, the heat exchanger is a plate heat exchanger, so that the heat transfer coefficient is high, the structure is compact, and the overhaul field is small.
In the system, one of the at least two closed cold water pumps operates in a frequency conversion mode, and the other one is standby in power frequency.
In the system, the water outlet pipes of the at least 2 cooling pipelines are connected to the same outlet.
In the system, the water inlet pipe is provided with an inlet valve.
In the system, the cooling pipeline is also provided with more than two drain valves 2, one of the more than two drain valves 2 is arranged on the water inlet pipe, the other drain valve is provided with the water outlet pipe, condensed water, air and carbon dioxide gas are discharged out of the pipeline as soon as possible through the drain valves 2, and meanwhile, the leakage of steam is automatically prevented to the maximum extent.
In the system, the cooling unit comprises any one of a stator water system, a hydrogen cooler, a coal mill lubricating oil system, a blower lubricating oil cooler, a draught fan lubricating oil cooler, a fire-resistant oil cooler and an air preheater bearing.
In a preferred embodiment, the heat exchanger of the cooling pipeline is provided with a plurality of temperature sensing devices, and the temperature of the closed cold water at other positions of the pipeline is monitored.
The following are preferred embodiments of the present invention:
cooling water enters a cooling pipeline after being boosted by a closed cold water pump, a heat exchanger 5 is arranged on each cooling pipeline, an inlet of each heat exchanger 5 is connected with a water inlet pipe, an outlet of each heat exchanger is connected with a water outlet pipe, the water inlet pipe is sequentially provided with an inlet valve 1, a drain valve 2 and a temperature sensing device 3 along the water flow direction, the heat exchanger is a plate cooler 5, and the water outlet pipe is sequentially provided with the drain valve 2, the temperature sensing device 3 and an electric temperature adjusting outlet valve 4 along the water flow direction; when the electric temperature regulation outlet valve 4 acts, the closed cold water cooling effect is cooperatively regulated by the temperature regulator and the intelligent actuator, after the temperature of the closed cold water is set by the temperature regulator in advance, the temperature sensor of the electric temperature regulation outlet valve 4 outputs a detection signal to the control valve, the control valve outputs a control signal to the intelligent actuator, so that the temperature of the closed cold water in the pipeline is cooled or heated to a set temperature, the control valve is opened, the closed cold water flows out through the electric temperature regulation outlet valve 4 and then is connected into the cooling unit for heat exchange, and the cooling unit comprises a stator water system, a coal mill lubricating oil system and an anti-fuel oil cooler. The temperature of each cooling pipeline after heat exchange is independently set according to different material cooling requirements, and each electric temperature regulation outlet valve is independently controlled, so that the flow in each cooling pipeline can be regulated according to the change of environmental conditions and production, and the mutual influence can be avoided.
The above are only embodiments of the present invention, and are not intended to limit the present invention, and to those skilled in the art, the present invention can have the combination and modification of the above various technical features, and those skilled in the art can replace the modifications, equivalents, or use the structure or method of the present invention in other fields to achieve the same effect without departing from the spirit and scope of the present invention, and all belong to the protection scope of the present invention.
Claims (8)
1. An automatic closed cold water temperature control system comprises a cooling unit and at least two closed cold water pumps, wherein the cooling unit is respectively connected with at least two cooling pipelines through the closed cold water pumps; the device is characterized in that each cooling pipeline is provided with a heat exchanger, the inlet of the heat exchanger is connected with a water inlet pipe, the outlet of the heat exchanger is connected with a water outlet pipe, and the water outlet pipe is provided with an electric temperature regulation outlet valve; the electric temperature regulation outlet valve comprises a control valve, an intelligent actuator and a temperature sensor, wherein the intelligent actuator is electrically connected with the control valve.
2. The closed circuit water temperature automatic control system according to claim 1, wherein the electric temperature regulating outlet valve further comprises a temperature regulator electrically connected to the control valve.
3. The chilled water shut-off temperature automatic control system of claim 1, wherein the heat exchanger is a plate heat exchanger.
4. The automatic closed-cold water temperature control system according to claim 1, wherein one of the at least two closed-cold water pumps is operated in a variable frequency mode, and the other one is standby at a power frequency.
5. The automatic closed-cold water temperature control system according to claim 1, wherein the water outlet pipes of the at least 2 cooling pipelines are connected to the same outlet.
6. The automatic closed-cold water temperature control system according to claim 1, wherein the water inlet pipe is provided with an inlet valve.
7. The automatic closed-cold water temperature control system as claimed in claim 1, wherein the cooling pipeline is further provided with more than 2 drain valves.
8. The automatic closed-cooling water temperature control system according to any one of claims 1 to 7, wherein the cooling unit comprises any one of a stator water system, a hydrogen cooler, a coal mill lubricating oil system, a blower lubricating oil cooler, an induced draft fan lubricating oil cooler, an anti-fuel oil cooler and an air preheater bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020875608.XU CN212057859U (en) | 2020-05-22 | 2020-05-22 | Closed cold water temperature automatic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020875608.XU CN212057859U (en) | 2020-05-22 | 2020-05-22 | Closed cold water temperature automatic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212057859U true CN212057859U (en) | 2020-12-01 |
Family
ID=73520154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020875608.XU Expired - Fee Related CN212057859U (en) | 2020-05-22 | 2020-05-22 | Closed cold water temperature automatic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212057859U (en) |
-
2020
- 2020-05-22 CN CN202020875608.XU patent/CN212057859U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |