Pipeline arrangement system for extracting waste heat of circulating water of power plant

Abstract

The invention relates to the technical field of waste heat utilization of power plants, in particular to a pipeline arrangement system for extracting waste heat of circulating water of a power plant. The system comprises a steam turbine condenser, a heat pump, a cooling tower and a circulating water pump, wherein an outlet of the steam turbine condenser is connected into the cooling tower through a circulating cooling water return pipeline, and an outlet of the cooling tower is communicated with an inlet of the steam turbine condenser through a circulating cooling water supply pipeline via the circulating water pump; and the outlet of the steam turbine condenser is further communicated with an inlet of the heat pump through a waste heat water supply pipeline, and an outlet of the heat pump is connected into the cooling tower through a waste heat water return pipeline. According to the pipeline arrangement system, under the conditions that original output (lift and flow) of the circulating water pump is not affected, output of the circulating water pump meets the requirements of various operation conditions of a turboset, and safe and stable operation of the turboset is ensured, exhaust steam waste heat of the power plant is recycled to the maximum extent, and heat consumption of the power plant is reduced.

Description

technical field [0001] The invention relates to the technical field of waste heat utilization in power plants, in particular to a pipeline layout system for extracting waste heat from circulating water in power plants. Background technique [0002] Thermal power plants use water (steam) as the working medium. The steam needs to be condensed into water in the condenser after the steam turbine does work, and then a large amount of latent heat generated by the process is released to the environment through the cooling tower of the secondary circulation cooling system. A large amount of heat loss is caused, and nearly 50% of the energy of the thermal power plant is lost here. In winter, the heat pump unit is used to recover the heat, which can be used for central heating in the city after the temperature is raised, and the waste heat of the power plant can be extracted to the maximum extent to improve thermal efficiency. [0003] The heat source water (waste hot water) of the h...

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Problems solved by technology

[0005] The invention provides a pipeline layout system for extracting waste heat from circulating water in a power plant, aiming to solve the problem that the current pipeline system adopts the method of connecting heat pump units in series with the circulating water system, which increases the resistance and increases the power consumption of the circulating water pump

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