Water quality stabilizer for circular cooling water in condesing unit of power plant

Abstract

The present invention relates to water quality stabilizer, and is especially one kind of water quality stabilizer for circular cooling water in condensing unit of power plant. The water quality stabilizer features that it contains SDF scale inhibitor in 1-10 mg / L and BTA corrosion inhibitor in 2-5 mg / L for use in the first three days and 0.5-1 mg / L for the later use. The practical use shows that SDF has few complexing effect on Cu, Fe and Zn ion and no corrosion on the copper tube of condensing unit, and BTA corrosion inhibitor can raise the corrosion resistance of copper tube. The quality stabilizer may be used in power plant to reach scale inhibiting and corrosion inhibiting effects.

Description

technical field [0001] The invention relates to a water quality stabilizer, in particular to a water quality stabilizer for circulating cooling water of a condenser in a power plant. Background technique [0002] In order to prevent scaling and corrosion of condenser copper tubes, most power plants add water quality stabilizers to the circulating cooling water of condensers. The water quality stabilizers contain scale inhibitors and copper corrosion inhibitors. Through scale inhibitors (commonly used scale inhibitors It is organic phosphine type and polycarboxylic acid type) to complex (chelate) calcium and magnesium ions in cooling water to form a water-soluble complex to prevent calcium and magnesium ions from precipitation and scaling; The etchant improves the corrosion resistance of the copper pipe and protects the copper pipe. Currently commonly used scale inhibitors are HEDP (hydroxyethylidene diphosphonic acid), ATMP (aminotrimethylenephosphonic acid), EDTMP (ethylen...

AI Technical Summary

Problems solved by technology

This may cause corrosion of the copper tubes of the condenser that should be protected

In the past, power plants have used water quality stabilizers with no corrosion inhibition effect or small corrosion inhibition effect for many years. When using water quality stabilizers, only its scale inhibition effect is considered, and its influence on metal ions in the use environment is not paid attention to; If you do not pay attention to the way of dosing, if you pour the medicine that needs to be added into the cooling water at once, it will cause the local concentration of the medicine at the water inlet of the condenser and damage the copper pipe at the water inlet.