Wet cooling unit low-pressure cylinder zero-power heat supply system and work method

Abstract

The invention provides a wet cooling unit low-pressure cylinder zero-power heat supply system and a work method. The system comprises a steam turbine high and medium pressure cylinder, a steam turbinelow pressure cylinder and a medium and low pressure communication pipeline connecting a steam turbine low pressure cylinder gas inlet end and a steam turbine high and medium pressure cylinder steam exhaust end, the steam exhaust end of the steam turbine low pressure cylinder is connected to a cold water tower of a unit through a condenser, a sixth valve group and a seventh valve group, a coolingbypass pipeline is mounted, the condenser is connected to a cold water tower of the other unit through a cooling bypass pipeline, through the cold water towers of the adjacent units, cooling is carried out, the cold water tower in the unit and a circular water pump connected with the cold water tower are in the non-work state, the icing damage of the cold water tower caused by the fact that waterwith the small flow enters the cold water tower can be avoided, meanwhile, the start number of the circular water pump and the cold water tower of the whole unit can be reduced, and the energy consumption is greatly reduced.

Description

technical field [0001] The present disclosure relates to the related technical field of heat and power cogeneration system, and specifically relates to a low-pressure cylinder zero-power heating system and working method of a wet-cooling unit. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] In recent years, in order to improve the utilization rate of clean energy, the country has to compress the traditional thermal power load to make way for the use of clean energy, reduce the power generation load of thermal power units, and ensure the grid connection of clean energy. However, there are some heat and power cogeneration central heating units in northern thermal power units. When the units are running, they operate in a heat-fixed power mode, that is, the electric load and the heat load are interrelated. The increase or decrease of the el...

AI Technical Summary

Problems solved by technology

[0005] 1. Most of the steam is used for heating, resulting in less water entering the cooling tower at low temperature, resulting in freezing damage to the cooling tower

[0006] 2. A large amount of steam is used for heating, resulting in high pressure in the pipes that output steam from the high and medium pressure cylinders for heating, which may easily lead to damage to the pipes

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