Anti-scaling method for circulating water system

Abstract

Disclosed is an anti-scaling method for a circulating water system. The method comprises the following steps that 1, sulfuric acid or alkali is uniformly and dropwise added in circulating water, and the PH value of water in a circulation pond is controlled to be kept at 7.5-8.3; 2, by supplementing water into the circulating water, the hardness of water in the circulation pond is kept equal to or smaller than 7 mmol / l; 3, a water outlet of the circulating water system discharges water through water discharge equipment, and the temperature of the discharged water is equal to or smaller than 45 DEG C. The anti-scaling method for the circulating water system has the advantage that an anti-scaling process for the circulating water cooling system is disclosed, and by the adoption of the process, scaling of the circulating water cooling system is completely avoided.

Description

technical field

[0001] The invention relates to the field of anti-scaling methods, in particular to an anti-scaling method for circulating water systems. Background technique

[0002] At present, on the basis of normally adding corrosion and scale inhibitors and bactericidal algicides to the circulating water system, by studying the scaling mechanism of circulating water, it is found that the main cause of scaling in circulating water is due to the existence of bicarbonate ions. During the cycle, water reacts with carbon dioxide in the air as follows: H 2 O+CO 2 →HCO3 - , bicarbonate ions combine with calcium and magnesium ions to form calcium bicarbonate and magnesium bicarbonate molecules. Calcium bicarbonate and magnesium bicarbonate are very unstable and will decompose into calcium carbonate, magnesium carbonate and carbon dioxide when heated. The chemical formula is Ca (HCO3) 2 →CaCO 3 +CO 2 , calcium carbonate and magnesium carbonate will adhere and precipitate on...