Composite scale inhibitor for high-hardness water

Abstract

The invention discloses a composite scale inhibitor for high-hardness water. The composite scale inhibitor for the high-hardness water is prepared by the following components: sodium carbonate, sodium hydroxide, sodium humate, lignosulfonate, sodium silicate and sodium aluminate. By the scale inhibitor, scaled substances can be changed into loose and high-mobility water slag and is settled along with the flocculation process, so the scale inhibition aim is fulfilled; and adsorption slime is changed on the aspect of properties, is loosened and softened and can be taken away by circulating water, so the pipeline and the spray head of the circulating water are difficult to block. The scale inhibitor can remove impurities and scaled substances from the circulating water in the settling process; the concentration multiple cannot be controlled during circulation; pollution discharge is avoided; and water resource is saved. The composite hardness-reducing inhibitor of the scale inhibitor is low in the price of each component, so the scale inhibitor is lower in cost compared with the common scale inhibitor in the current market, and the operation cost of the circulating water is reduced. The scale inhibitor can inhibit scale, can also effectively reduce the hardness of the water and control the alkalinity of the water, and is applicable to scale inhibition and turbid reduction of sewage circulating systems for smoke dust removal and smoke washing.

Description

technical field [0001] The invention relates to a water treatment agent, in particular to a composite scale inhibitor for high hardness water. Background technique [0002] In industrial direct circulating cooling water, it is mainly a circulating water system for flue gas washing, wet dust removal, etc. Wet scrubbing of flue gas from converter steelmaking is a common process. During the process of washing converter flue gas in the dust removal water system, the turbid water absorbs a large amount of iron oxide powder, calcium oxide, magnesium oxide, silicon dioxide, etc. Impurities. The content of suspended matter increases sharply in a very short period of time, some complex physical and chemical changes are carried out at high temperature, and a large amount of CO is absorbed in the process of absorbing flue gas 2 Temporarily the water body is slightly acidic, when the dedusting water returns to the sedimentation tank, a large amount of CO 2 Overflow, coupled with the ...

AI Technical Summary

Problems solved by technology

Commonly used polyaluminum (or polyiron) plus polyacrylamide flocculation and commonly used scale inhibitors are used to disperse and inhibit scale. Since the hardness and alkalinity are too high and exceed the maximum tolerance of scale inhibitors, a large amount of water is required; it will cause While water resources are wasted, the scale inhibition effect is not ideal

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