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

A technology of water quality stabilizer and circulating cooling water, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc., can solve damage to water inlet copper pipe, condenser copper pipe corrosion, Problems such as small corrosion inhibition

A technology of water quality stabilizer and circulating cooling water, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc., can solve damage to water inlet copper pipe, condenser copper pipe corrosion, Problems such as small corrosion inhibition

CN1548387AInactive Publication Date: 2004-11-24SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Embodiment Construction

[0021] When using water quality stabilizers in power plants, attention must be paid to the effects of chemicals on metal ions in the use environment. If the chemicals will affect some metal ions, they should pass the test and select the highest concentration of chemicals allowed to be used. If the concentration can meet the scale inhibition requirements , you can continue to use the water quality stabilizer, but pay attention to various factors such as the dosing method, and ensure that the concentration does not exceed this concentration. SDF scale inhibitor and BTA corrosion inhibitor are used at the same time at the following concentration. When using SDF scale inhibitor, use a concentration of 1 -10mg / L, use BTA corrosion inhibitor, the use concentration is 2-5mg / L for the first 3 days, and then control 0.5-1mg / L.

[0022] Example of use:

[0023] 1. In a power plant in Anhui, the water quality stabilizer used affects Cu, Fe and Zn. There is no scale deposition or film on ...

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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...

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Application Information

Patent Timeline
24 Nov 2004
Publication
CN1548387A
IPC
C02F5/10; C02F5/12
Inventors
吴一平; 周国定