Electric power plant cooling system for enhancing cooling efficiency by utilizing residual heat refrigeration manner

Abstract

The invention relates to a power plant cooling system which improves the cooling efficiency by a residual heat refrigeration way, in particular to a cooling system which is used for the power plant, carries out the refrigeration by the residual heat of a steam turbine and utilizes the prepared cold water to cool the circular cooling water of the steam turbine further. The cooling system comprises a steam condensed water circulation consisting of a steam turbine, a steam condenser, a condensed water circulation pump and a combustion boiler, and a steam cooled water circulation consisting of a steam condenser, a cooling tower and a cooled water circulation pump. The cooling system is characterized in that a lithium bromide refrigeration unit is added; a high pressure generator of the lithium bromide refrigeration unit is arranged between the steam turbine and the steam condenser so as to lead the steam to become the heat source of the unit; the unit also comprises a refrigerant water tank which can store the cold energy; furthermore, the refrigerant water tank is connected with all air conditioners of the central air conditioning by pipelines; and the refrigerant water tank is arranged between the steam condenser and the cooling water circulation pump so that the refrigerant water is used for supplying the coldness to the central air conditioning or further cooling the circular cooling water of the steam turbine. The cooling system solves the problem that the residual heat of the power plant is cooled and wasted and has the advantages of high cooling efficiency, saving energy, being capable of supplying the cold source for the central air conditioning and the like.

Description

Technical field [0001] The invention belongs to a waste heat cooling technology, in particular to a cooling system used in a power plant, which utilizes the waste heat of a steam turbine to refrigerate, produces cold water and then further cools the circulating cooling water of the steam turbine. Background technique [0002] Thermal power plants use coal, oil, and natural gas as fuel to heat water to generate high-temperature and high-pressure steam, which converts the chemical energy of the fuel into thermal energy. The steam pressure drives the steam turbine to rotate, and the thermal energy is converted into mechanical energy. Then the steam turbine drives the generator to rotate, converting the mechanical energy into electrical energy. . Because the high-temperature and high-pressure steam is dangerous and explosive, in order to ensure the safe operation of the unit, it is necessary to cool the exhaust temperature of the low-pressure cylinder of the steam turbine, reduc...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above waste heat cooling and waste problems, and to provide a power plant cooling system that utilizes steam turbine waste heat to drive a lithium bromide refrigeration unit to produce cold water and then further cool the steam turbine circulating cooling water. It has high cooling efficiency, energy saving, and can supply Central air-conditioning cold source and other characteristics

Images