Variable frequency pump and reversed-U-shaped siphon based direct current circulating water supply system
A technology of direct current circulation and water supply system, applied in the direction of siphon, pump control, pump components, etc., can solve the problems of water head drop loss, energy loss, etc., and achieve the effect of saving plant electricity
Active Publication Date: 2015-01-07
SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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Problems solved by technology
[0006] During normal operation, the operating water level of the sea surface is lower than 1% of the high tide level, and the water has a head drop loss behind the siphon well, part of which occurs behind the overflow weir of the siphon well, and part of it occurs at the outlet of the sea. Large, resulting in a large energy loss
Method used
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Embodiment 1
[0064] Embodiment 1: Taking a 2×1000MW project of a certain power plant as an example, the flow rate of the circulating water pump is Q=9.48m3 / s, the power is 2500KW, 6 circulating water pumps are installed in 2 machines, 6 pumps are operated in summer, and 4 pumps are operated in winter when the circulating water temperature is low Pump. The energy saving analysis is carried out according to three situations:
[0065] 1. 2 pumps stopped running for 4 months to save power consumption analysis:
[0066] During the 4 months in winter, the circulating water temperature is low, and the circulating water volume of the condenser can be reduced. Due to the variable speed circulating water pump, it can be applied to various water temperatures and various load requirements.
[0067] Assume that the annual utilization hours of the unit are 5500h, and the 2 pumps stop running for 4 months to save power consumption of the plant:
[0068] 2500x2x5500x4 / 12≈9.17x10 6 KWh
[0069] On-grid...
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Abstract
The invention discloses a variable frequency pump and reversed-U-shaped siphon based direct current circulating water supply system. The variable frequency pump and reversed-U-shaped siphon based direct current circulating water supply system comprises a circulating water pump front forebay, a circulating water pump, a steam condenser, a vacuum pump, a draining well and a reversed-U-shaped siphon; the circulating water pump sends water inside the circulating water pump front forebay into the steam condenser; the vacuum pump is connected to a water outlet end of the steam condenser; the water outlet end of the steam condenser is connected with the draining well; the draining well is connected with one end of the reversed-U-shaped siphon; the other end of the reversed-U-shaped siphon is connected with a drainage pipe; liquid inside the drainage pipe can be drained into the ocean or rivers; the circulating water pump is a variable frequency regulated variable speed pump. According to the variable frequency pump and reversed-U-shaped siphon based direct current circulating water supply system, the variable frequency regulated variable speed pump and the reversed-U-shaped siphon replace a siphon well scheme, the total power amount is at a second place of a whole factory through a specified energy saving control method under a low circulating water temperature (the steam condenser inlet) and low unit load or low tide level (or low water level), and considerable electricity consumption and electric charge of the factory are saved.
Description
technical field [0001] The invention relates to a direct current circulating water supply system based on a variable frequency pump and an inverted U-shaped siphon. Background technique [0002] China has a large population and relatively insufficient resources. In order to achieve effective utilization of energy resources and sustainable economic and social development, it is necessary to take the road of energy conservation and improve energy use and utilization efficiency. In recent years, the state has successively revised and promulgated the "Energy Conservation Law", "Renewable Energy Law", "Circular Economy Promotion Law", "Oil and Natural Gas Pipeline Protection Law", "Regulations on Energy Conservation of Civil Buildings", "Regulations on Energy Conservation of Public Institutions", etc. laws and regulations. The "Twelfth Five-Year Plan for Energy Development" proposes: During the "Twelfth Five-Year Plan" period, it is necessary to accelerate the transformation of ...
Claims
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Login to View More IPC IPC(8): F01D25/32F04B49/06F04F10/00
Inventor 张磊李临临于连海赵佰波
Owner SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP