Method for treating water in process of thermal power generation

Abstract

The invention relates to a method for treating water in the process of thermal power generation. The process comprises the treatment processes of surface water and circulating cooling water. The method is characterized in that in the process, part of water in a circulating water return pipe of a steam engine is introduced to a pretreatment system of the surface water, so that the water is taken as water inflow in the chemical pretreatment process directly for chemical treatment; and simultaneously, fresh water of which the water volume is more than that of water led out of the circulating water return pipe of the steam engine is replenished additionally in a circulating water inlet pipe of the steam engine. The method of the invention has the advantages of improving the water quality of circulating water substantially, improving condenser vacuum degree and the generating efficiency of machine sets, utilizing heat effectively and saving energy, along with simple process, wide source of medicaments, low cost and simple and convenient system operation, and has the obvious economic and social benefits.

Description

Technical field [0001] A thermal power plant water treatment method relates to a thermal power plant water treatment method combining chemical water treatment and circulating cooling water treatment technology. Background technique [0002] In the production of electricity, the condenser, air cooler, and oil cooler of the thermal power plant unit all use cooling water. There are usually two types of cooling water systems: once-through cooling water systems and circulating cooling water systems. Usually the power plant is built on the seaside or along the river bank, when the water resources are very abundant and convenient, the cooling water system uses the through-flow cooling, that is, the cooling water is discharged only once through the heat exchange equipment, so the through-flow water is also called once Use water. The characteristics of DC cooling are: the water consumption is large, no treatment is required, the temperature rise of the water after the heat exchange equi...

AI Technical Summary

Problems solved by technology

When the chemical water treatment system is running, the temperature of the incoming water is often low, which affects the treatment effect. It is necessary to artificially add a heat source to heat the incoming water, and then use new steam to heat the desalted water into the furnace to reach the designed feedwater temperature, which consumes a lot of energy.