Unit technology water supply anti-condensation device

Abstract

The utility model provides a unit technology water supply anti-condensation device which is simple in structure, easy in method implementation, convenient to operate and strong in applicability, and comprises a draft tube, a technology water supply and water taking header pipe, a cooling unit and a technology water supply and water drainage header pipe, and the technology water supply and water taking header pipe takes water from the draft tube to obtain hot water passing through a cooling unit user. The system further comprises a unit technical water supply anti-condensation system and an in-plant air temperature sensor, and the unit technical water supply anti-condensation system takes water from the technical water supply and drainage main pipe; the anti-condensation effect is achieved by monitoring the temperature of the pipeline in the anti-condensation system and regulating and controlling the temperature difference between the temperature of the pipeline and the temperature of air in a plant.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power production, in particular to a unit technology water supply anti-condensation device suitable for a pumped storage power station. Background Art

[0002] According to the characteristics of water supply and water intake of pumped storage power stations, water is generally taken from the tailwater pipe, where the water temperature is relatively low. After being pressurized by the technical water supply pump, it is transported to each user end of the unit. After passing through each user, the water temperature rises, and then passes through Figure 1 The cooling unit shown includes an upper guide bearing cooler, a generator air cooler, a thrust bearing cooler, a water guide bearing cooler, a lower guide bearing cooler, a main shaft seal water supply, a leak-proof ring water supply and a main transformer cooler, and finally the water is discharged to the downstream through a drainage main pipe to form a circulation.

[0003] In autumn, winter and early spring, the air temperature is significantly higher than the water temperature, and condensation will form on the water pipes due to condensation of hot air. This will not only cause humidity in the plant, a large number of water droplets will form on the ground, but will also have an adverse effect on the paint on the outer surface of the pipeline. Therefore, during the operation of the technical water supply system of the pumped storage power station, anti-condensation measures need to be taken for the pipeline.

[0004] After field practice verification, it was found that if the temperature difference between the water temperature and the air temperature is within 8°C, condensation will not occur. The method of covering with insulation layer is widely used in anti-condensation measures for hydraulic pipelines, but the working pressure of the water supply pipelines in hydropower plants is extremely high. Covering with insulation layer will bring great inconvenience to subsequent inspection and maintenance, and may even bring safety hazards. Domestic hydropower construction and management units have explicitly required that the technical water supply pipelines of hydropower stations are prohibited from being covered with insulation layer. In addition, methods such as increasing the number and power of dehumidification equipment and adding dehumidification systems are not only economical, but also have a great impact on the original equipment operating environment and power demand in the plant, so it is difficult to implement.

[0005] In summary, there is currently no device and method for preventing condensation in water supply pipelines that is simple in structure, easy to operate, and applicable to the entire hydropower plant. Utility Model Content

[0006] The utility model aims to provide a unit technology water supply and anti-condensation device which has a simple structure, is easy to implement, is convenient to operate and has strong applicability.

[0007] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0008] The unit technical water supply anti-condensation device includes a tailwater pipe, a technical water supply water intake main pipe, a cooling unit, and a technical water supply drainage main pipe. The technical water supply water intake main pipe takes water from the tailwater pipe to obtain hot water after passing through the cooling unit user, and then flows into the tailwater pipe through the technical water supply drainage main pipe. It also includes a unit technical water supply anti-condensation system and an in-plant air temperature sensor. The unit technical water supply anti-condensation system takes water from the technical water supply drainage main pipe.

[0009] The unit technical water supply anti-condensation system includes a unit technical water supply anti-condensation pipeline and an electric valve, an electromagnetic flowmeter, a temperature sensor, a flow regulating valve, a signal processing system, and a system temperature sensor on the pipeline. The system temperature sensor is arranged on the technical water supply water intake main pipe. The signal processing system is used to process the temperature difference between the system temperature sensor and the air temperature sensor in the plant. If the temperature difference is greater than 8°C, the electric valve is controlled to open. If the temperature difference is less than 8°C, the electric valve is controlled to close. The electric valve is used to regulate the commissioning of the unit technical water supply anti-condensation system. The electromagnetic flowmeter and the temperature sensor determine the introduced flow and temperature through real-time monitoring. The flow regulating valve is used to adjust the flow of the unit technical water supply anti-condensation system.

[0010] When the electric valve is opened, the flow regulating valve is opened synchronously, and the flow regulating valve is gradually opened until the temperature difference between the plant temperature sensor and the system temperature sensor is less than 8°C, and the flow regulating valve is fixed at a fixed opening.

[0011] Furthermore, a main flow regulating valve is arranged on the technical water supply and drainage main pipe. If the temperature difference between the temperature sensor in the plant and the system temperature sensor is still greater than 8°C when the flow regulating valve is opened to the maximum, the main flow regulating valve on the technical water supply and drainage main pipe is adjusted to reduce the flow of the main pipe, and then increase the flow on the unit technical water supply anti-condensation pipeline to adjust the temperature difference between the two to be less than 8°C.

[0012] Furthermore, the unit technology water supply anti-condensation system also includes a check valve, which is used to prevent water from flowing back from the water intake to the drain pipe.

[0013] Furthermore, the unit technical water supply anti-condensation system also includes a maintenance valve, which is respectively arranged on the water inlet and outlet sides of the pipeline for routine and emergency maintenance.

[0014] Furthermore, a check valve is provided in the water intake section of the technical water supply intake main.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The unit technical water supply anti-condensation device of the utility model has a simple structure and is only composed of newly added pipelines and equipment. It is low-cost, durable, and safe, and is very suitable for the technical water supply system of a pumped-storage power station. The method steps are easy to implement, the equipment and pipelines are connected to the corresponding positions, and the control system is used to feedback and adjust the entire system, which is accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the anti-condensation arrangement of the technical water supply system of the pumped storage power station of the utility model.

[0018] Figure numerals: 1. Tail water pipe; 2. Technical water supply intake main; 3. Cooling unit; 4. Technical water supply drainage main; 41. Main flow regulating valve; 5. Unit technical water supply anti-condensation system; 51. Electric valve; 52. Electromagnetic flow meter; 53. Temperature sensor; 54. Flow regulating valve; 55. Signal processing system; 56. System temperature sensor; 57. Check valve; 58. Inspection valve; 6. Air temperature sensor in the plant. DETAILED DESCRIPTION

[0019] The embodiments of the present utility model are described in further detail below in conjunction with the accompanying drawings.

[0020] like Figure 1 As shown, the unit technical water supply anti-condensation device includes a tailwater pipe 1, a technical water supply water intake main pipe 2, a cooling unit 3, and a technical water supply drainage main pipe 4. The technical water supply water intake main pipe 4 takes water from the tailwater pipe 1 to obtain hot water after passing through the cooling unit 3 user, and then flows into the tailwater pipe 1 through the technical water supply drainage main pipe 4. It also includes a unit technical water supply anti-condensation system 5 and an in-plant air temperature sensor 6. The unit technical water supply anti-condensation system 5 takes water from the technical water supply drainage main pipe 4.

[0021] The unit technical water supply anti-condensation system 5 includes a unit technical water supply anti-condensation pipeline and an electric valve 51, an electromagnetic flowmeter 52, a temperature sensor 53, a flow regulating valve 54, a signal processing system 55, and a system temperature sensor 56 on the pipeline. The system temperature sensor 56 is arranged on the technical water supply water intake main 2. The signal processing system 55 is used to process the temperature difference between the system temperature sensor 56 and the air temperature sensor 6 in the plant. If the temperature difference is greater than 8°C, the electric valve 51 is controlled to be opened. If the temperature difference is less than 8°C, the electric valve 51 is controlled to be closed. The electric valve 51 is used to control the commissioning of the unit technical water supply anti-condensation system 5. The electromagnetic flowmeter 52 and the temperature sensor 53 determine the introduced flow and temperature through real-time monitoring. The flow regulating valve 54 is used to adjust the flow of the unit technical water supply anti-condensation system 5.

[0022] When the electric valve 51 is opened, the regulating valve 54 is opened synchronously, and the regulating valve 54 is gradually opened until the temperature difference between the plant temperature sensor 6 and the system temperature sensor 56 is less than 8° C., and the regulating valve 54 is fixed in opening.

[0023] A total flow regulating valve 41 is provided on the technical water supply and drainage main pipe 4. If the flow regulating valve 41 is opened to the maximum, and the temperature difference between the air temperature sensor 6 in the plant and the system temperature sensor 56 is still greater than 8°C, the total flow regulating valve 41 on the technical water supply and drainage main pipe 4 is adjusted to reduce the flow of the main pipe, and then increase the flow on the unit technical water supply anti-condensation pipeline to adjust the temperature difference between the two to less than 8°C.

[0024] The unit technology water supply anti-condensation system 5 also includes a check valve 57, and the check valve 57 is used to prevent the water flow from the water intake from flowing back to the drain pipe.

[0025] The unit technical water supply anti-condensation system 5 also includes a maintenance valve 58, which is respectively arranged on the water inlet and outlet sides of the pipeline for routine and emergency maintenance.

[0026] A check valve is provided in the water intake section of the water supply and intake main pipe 2 to prevent the backflow of high-pressure water.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. The unit technical water supply anti-condensation device includes a tailwater pipe, a technical water supply main pipe, a cooling unit, and a technical water supply drainage main pipe. The technical water supply main pipe takes water from the tailwater pipe to obtain hot water after passing through the cooling unit user, and then flows into the tailwater pipe through the technical water supply drainage main pipe. The characteristics are: It also includes a unit technical water supply anti-condensation system and an in-plant air temperature sensor, wherein the unit technical water supply anti-condensation system takes water from the technical water supply and drainage main; The unit technical water supply anti-condensation system includes a unit technical water supply anti-condensation pipeline and an electric valve, an electromagnetic flowmeter, a temperature sensor, a flow regulating valve, a signal processing system, and a system temperature sensor on the pipeline. The system temperature sensor is arranged on the technical water supply water intake main pipe. The signal processing system is used to process the temperature difference between the system temperature sensor and the air temperature sensor in the plant. If the temperature difference is greater than 8°C, the electric valve is controlled to open. If the temperature difference is less than 8°C, the electric valve is controlled to close. The electric valve is used to regulate the commissioning of the unit technical water supply anti-condensation system. The electromagnetic flowmeter and the temperature sensor determine the introduced flow and temperature through real-time monitoring. The flow regulating valve is used to adjust the flow of the unit technical water supply anti-condensation system. When the electric valve is opened, the flow regulating valve is opened synchronously, and the flow regulating valve is gradually opened until the temperature difference between the plant temperature sensor and the system temperature sensor is less than 8°C, and the flow regulating valve is fixed at a fixed opening.

2. The unit technology water supply anti-condensation device according to claim 1, characterized in that: A total flow regulating valve is provided on the technical water supply and drainage main pipe. If the temperature difference between the temperature sensor in the plant and the system temperature sensor is still greater than 8°C when the flow regulating valve is opened to the maximum, the total flow regulating valve on the technical water supply and drainage main pipe is adjusted to reduce the flow of the main pipe, and then increase the flow on the unit technical water supply anti-condensation pipeline to adjust the temperature difference between the two to less than 8°C.

3. The unit technology water supply anti-condensation device according to claim 2, characterized in that: The unit technology water supply anti-condensation system also includes a check valve, which is used to prevent water from flowing back from the water intake to the drain pipe.

4. The unit technology water supply anti-condensation device according to claim 2, characterized in that: The unit technical water supply anti-condensation system also includes a maintenance valve, which is respectively arranged on the water inlet and outlet sides of the pipeline for routine and emergency maintenance.

5. The unit technology water supply anti-condensation device according to claim 1 or 2, characterized in that: A check valve is provided in the water intake section of the water supply main pipe of the technology.

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