CN210289855U - Steam turbine lubricating oil quick auxiliary cooling device of steam power plant - Google Patents
Steam turbine lubricating oil quick auxiliary cooling device of steam power plant Download PDFInfo
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- CN210289855U CN210289855U CN201921404928.0U CN201921404928U CN210289855U CN 210289855 U CN210289855 U CN 210289855U CN 201921404928 U CN201921404928 U CN 201921404928U CN 210289855 U CN210289855 U CN 210289855U
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Abstract
A kind of steam turbine lubricating oil fast cooling device of the thermal power plant, including evaporator, compressor, condenser, expansion valve and control mechanism, the compressor inlet is connected with outlet of the evaporator through the pipeline, the inlet of the condenser is connected with outlet of the compressor through the pipeline, the inlet of the expansion valve is connected with outlet of the condenser through the pipeline, the outlet of the expansion valve is connected with inlet of the evaporator through the pipeline; the utility model adopts the above technical scheme, good effect has been got: the auxiliary device for rapidly cooling the lubricating oil of the steam turbine of the thermal power plant utilizes the inverse Carnot principle, realizes the auxiliary rapid cooling of the lubricating oil through the evaporator, the compressor, the condenser and the expansion valve, and the control mechanism can automatically control the frequency conversion control of the compressor according to the temperature of the lubricating oil, thereby effectively solving the problem that the temperature of the lubricating oil of the steam turbine is too high in summer, the traditional heat exchanger can not reduce the lubricating oil to the proper temperature, and providing better guarantee for the stable operation of the steam turbine.
Description
Technical Field
The utility model relates to a power plant's power generation facility field, the utility model discloses a quick auxiliary cooling device of steam turbine lubricating oil of steam power plant.
Background
In most areas of China, summer is very hot, the ambient temperature in summer is as high as about 38 ℃, cooling water of a thermal power plant is generally cooled by a natural convection cooling tower, and the temperature of the cooling water can be generally reduced to about 32 ℃ due to the influence of the dry and wet bulb temperatures. The temperature of lubricating oil in a main oil tank of the steam turbine is about 60 ℃, 32-DEG C water is used, the 60-DEG C oil is cooled by a traditional oil cooler, adverse factors such as scaling of a heat exchanger, blockage of a cooling channel and the like are added, the lubricating oil of the steam turbine is difficult to be cooled to be below 38℃ required by design, the lubricating effect is greatly reduced due to overhigh temperature of the lubricating oil, the lubrication of a main shaft of the steam turbine is directly influenced, and a great effect is achieved on the safe operation of the steam turbine; the existing turbine lubricating oil cooling usually adopts a heat exchanger for cooling, but because the capacity of a lubricating oil tank of a steam turbine of a thermal power plant is very large, the cooling speed of the traditional heat exchanger on the lubricating oil can not meet the cooling requirement completely; therefore, a device is needed to solve the problem that the traditional heat exchanger cannot reduce the lubricating oil to the proper temperature when the temperature of the lubricating oil of the existing steam turbine is too high in summer.
SUMMERY OF THE UTILITY MODEL
The utility model provides a quick auxiliary cooling device of steam turbine lubricating oil of steam power plant for solve current steam turbine lubricating oil summer too high temperature and use traditional heat exchanger can't fall lubricating oil to the problem of suitable temperature.
The purpose of the utility model is realized by adopting the following technical scheme:
a kind of steam turbine lubricating oil fast cooling device of the thermal power plant, including evaporator, compressor, condenser, expansion valve and control mechanism, the compressor inlet is connected with outlet of the evaporator through the pipeline, the inlet of the condenser is connected with outlet of the compressor through the pipeline, the inlet of the expansion valve is connected with outlet of the condenser through the pipeline, the outlet of the expansion valve is connected with inlet of the evaporator through the pipeline, the evaporator, compressor, condenser, expansion valve and connecting the pipeline are filled with the refrigerant, the control mechanism is set up in one side of the compressor; the evaporator is lubricating oil heat absorption equipment, one side of the evaporator is respectively provided with a lubricating oil inlet pipe and a lubricating oil outlet pipe, the lubricating oil inlet pipe and the lubricating oil outlet pipe are communicated with a lubricating oil tank of the steam turbine through pipelines, the middle parts of the lubricating oil inlet pipe and the lubricating oil outlet pipe are respectively provided with a valve, one side of the valve of the lubricating oil inlet pipe is provided with an oil pump, and the oil pump is connected with a control mechanism through an electric wire; and a temperature sensor is arranged on the lubricating oil outlet pipe and is connected with the control mechanism through an electric wire.
The condenser be water-cooled heat exchanger, one side of condenser is provided with inlet tube and outlet pipe respectively, the inlet tube is provided with the valve respectively with the outlet pipe middle part, inlet tube valve one side is provided with the water pump, the water pump passes through the electric wire and is connected with control mechanism.
The compressor is a refrigeration compressor, the motor of the compressor is a variable frequency motor, and the motor is connected with the control mechanism through an electric wire.
The expansion valve is a thermal expansion valve.
The control mechanism is an electric control cabinet with a PLC controller arranged inside.
The utility model adopts the above technical scheme, good effect has been got: the auxiliary device for rapidly cooling the lubricating oil of the steam turbine of the thermal power plant utilizes the inverse Carnot principle, realizes the auxiliary rapid cooling of the lubricating oil through the evaporator, the compressor, the condenser and the expansion valve, and the control mechanism can automatically control the frequency conversion control of the compressor according to the temperature of the lubricating oil, thereby effectively solving the problem that the temperature of the lubricating oil of the steam turbine is too high in summer, the traditional heat exchanger can not reduce the lubricating oil to the proper temperature, and providing better guarantee for the stable operation of the steam turbine.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of use.
In the figure: 1. the system comprises an evaporator, 2, an expansion valve, 3, a condenser, 4, a water outlet pipe, 5, a water pump, 6, a water inlet pipe, 7, a compressor, 8, a motor, 9, a control mechanism, 10, a temperature sensor, 11, a valve, 12, a lubricating oil outlet pipe, 13, an oil pump, 14, a lubricating oil inlet pipe, I, a thermal power plant turbine lubricating oil quick auxiliary cooling device, II, cooling water equipment, III, a lubricating oil tank, IV, an oil cooler, V and a turbine.
Detailed Description
The present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the device for rapidly and auxiliary cooling of lubricating oil for a steam turbine of a thermal power plant comprises an evaporator 1, a compressor 7, a condenser 3, an expansion valve 2 and a control mechanism 9, wherein the evaporator 1 is a lubricating oil heat absorption device, one side of the evaporator 1 is provided with a lubricating oil inlet pipe 14 and a lubricating oil outlet pipe 12 respectively, the lubricating oil inlet pipe 14 and the lubricating oil outlet pipe 12 are communicated with a lubricating oil tank iii of the steam turbine through a pipeline, the middle parts of the lubricating oil inlet pipe 14 and the lubricating oil outlet pipe 12 are provided with a valve 11 respectively, one side of the valve 11 of the lubricating oil inlet pipe 14 is provided with an oil pump 13, and the oil pump 13; a temperature sensor 10 is arranged on the lubricating oil outlet pipe 12, and the temperature sensor 10 is connected with the control mechanism 9 through an electric wire; an inlet of the compressor 7 is connected with an outlet of the evaporator 1 through a pipeline, the compressor 7 is a refrigeration compressor, a motor 8 of the compressor is a variable frequency motor, and the motor 8 is connected with a control mechanism 9 through an electric wire; the inlet of the condenser 3 is connected with the outlet of the compressor 7 through a pipeline, the condenser 3 is a water-cooling heat exchanger, one side of the condenser 3 is respectively provided with a water inlet pipe 6 and a water outlet pipe 4, the middle parts of the water inlet pipe 6 and the water outlet pipe 4 are respectively provided with a valve, one side of the valve of the water inlet pipe 6 is provided with a water pump 5, and the water pump 5 is connected with a control mechanism 9 through an electric wire; the inlet of the expansion valve 2 is connected with the outlet of the condenser 3 through a pipeline, the outlet of the expansion valve 2 is connected with the inlet of the evaporator 1 through a pipeline, and the expansion valve 2 is a thermal expansion valve; the evaporator 1, the compressor 7, the condenser 3, the expansion valve 2 and the connecting pipe are filled with refrigerant; the control mechanism 9 is arranged on one side of the compressor 7, and the control mechanism 9 is an electric control cabinet with a PLC controller arranged inside.
When the oil cooler IV of the lubricating oil in high-temperature seasons cools the lubricating oil, the oil temperature is too high, the quick auxiliary cooling device I of the turbine lubricating oil in the thermal power plant starts to be used, firstly, an auxiliary oil outlet pipe and an auxiliary oil inlet pipe of a turbine lubricating oil tank III are connected with a lubricating oil inlet pipe 14 and a lubricating oil outlet pipe 12 of an evaporator 1, a water inlet pipe 6 and a water outlet pipe 4 of a condenser 3 are connected with a cooling water device II, a compressor 7 starts to work, the heat of the lubricating oil flowing through the evaporator 1 is absorbed by the refrigerant in the evaporator 1, then the refrigerant is sprayed out through an expansion valve 2, the refrigerant absorbing the heat is conveyed into the condenser 3, the heat brought by the refrigerant is circularly taken away through the cooling water circulation in the condenser 3, the refrigerant cooled after heat is radiated returns to the evaporator 1 to absorb the heat of the lubricating oil in the evaporator 1 again, and finishing the auxiliary cooling process of the lubricating oil tank III of the steam turbine.
Example 1: lubricating oil supply temperature t of steam turbine VgGenerally, the temperature is required to be about 38 ℃, and when the oil cooler IV has the worst working efficiency, the lubricating oil is cooled to to=50 ℃ or so, and M =200M of 1000MW turbine lubricating oil flow3H, density ρ =880Kg/m3Specific heat capacity C of lubricating oil in this temperature rangepThe uncooled heat generated by the oil cooler IV due to the heat exchange difference is subjected to auxiliary cooling by a rapid auxiliary cooling device I for steam turbine lubricating oil of a thermal power plant, and the load is as follows:
Q=MCp（to-tg）
=200×880×1.94×(50-38)
=1137KW
considering the standardized design and the abundance of the unit:
Q=1200KW
the requirement of auxiliary cooling of the lubricating oil of the turbine V can be completely met.
The part of the utility model not detailed is prior art.
Claims (5)
1. The utility model provides a steam turbine lubricating oil rapid cooling device of steam power plant, includes evaporimeter, compressor, condenser, expansion valve and control mechanism, characterized by: the inlet of the compressor is connected with the outlet of the evaporator through a pipeline, the inlet of the condenser is connected with the outlet of the compressor through a pipeline, the inlet of the expansion valve is connected with the outlet of the condenser through a pipeline, the outlet of the expansion valve is connected with the inlet of the evaporator through a pipeline, the evaporator, the compressor, the condenser, the expansion valve and the connecting pipeline are filled with a refrigerant, and the control mechanism is arranged on one side of the compressor; the evaporator is lubricating oil heat absorption equipment, one side of the evaporator is respectively provided with a lubricating oil inlet pipe and a lubricating oil outlet pipe, the lubricating oil inlet pipe and the lubricating oil outlet pipe are communicated with a lubricating oil tank of the steam turbine through pipelines, the middle parts of the lubricating oil inlet pipe and the lubricating oil outlet pipe are respectively provided with a valve, one side of the valve of the lubricating oil inlet pipe is provided with an oil pump, and the oil pump is connected with a control mechanism through an electric wire; and a temperature sensor is arranged on the lubricating oil outlet pipe and is connected with the control mechanism through an electric wire.
2. The device for rapidly cooling lubricating oil of the steam turbine of the thermal power plant according to claim 1, which is characterized in that: the condenser be water-cooled heat exchanger, one side of condenser is provided with inlet tube and outlet pipe respectively, the inlet tube is provided with the valve respectively with the outlet pipe middle part, inlet tube valve one side is provided with the water pump, the water pump passes through the electric wire and is connected with control mechanism.
3. The device for rapidly cooling lubricating oil of the steam turbine of the thermal power plant according to claim 1, which is characterized in that: the compressor is a refrigeration compressor, the motor of the compressor is a variable frequency motor, and the motor is connected with the control mechanism through an electric wire.
4. The device for rapidly cooling lubricating oil of the steam turbine of the thermal power plant according to claim 1, which is characterized in that: the expansion valve is a thermal expansion valve.
5. The device for rapidly cooling lubricating oil of the steam turbine of the thermal power plant according to claim 1, which is characterized in that: the control mechanism is an electric control cabinet with a PLC controller arranged inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921404928.0U CN210289855U (en) | 2019-08-28 | 2019-08-28 | Steam turbine lubricating oil quick auxiliary cooling device of steam power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921404928.0U CN210289855U (en) | 2019-08-28 | 2019-08-28 | Steam turbine lubricating oil quick auxiliary cooling device of steam power plant |
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| CN210289855U true CN210289855U (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113830855A (en) * | 2021-08-31 | 2021-12-24 | 华能沁北发电有限责任公司 | Terminal curing system |
-
2019
- 2019-08-28 CN CN201921404928.0U patent/CN210289855U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113830855A (en) * | 2021-08-31 | 2021-12-24 | 华能沁北发电有限责任公司 | Terminal curing system |
| CN113830855B (en) * | 2021-08-31 | 2023-09-15 | 华能沁北发电有限责任公司 | Terminal solidification system |
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