A kind of non-phosphorus copolymer antiscaling dispersant and preparation method thereof

Abstract

The invention relates to a phosphorus-free copolymer scale inhibiting dispersant and a preparation method thereof. The scale inhibiting dispersant is prepared through the one-step polymerization of 10-20wt% of allyl sulfonic acid, 10-20wt% of acrylate and 60-80wt% of maleic acid and / or itaconic acid in an aqueous solution in a manner of being initiated by inorganic peroxide. The invention further discloses a method for preparing the copolymer scale inhibiting dispersant. According to the copolymer scale inhibiting dispersant prepared by the method, the molecular structure simultaneously contains a plurality of functional groups; in case of lower dosing concentration, better calcium carbonate scale and calcium phosphate scale inhibiting performance and zinc salt stabilizing performance can be obtained, and the ferric oxide dispersity is also better. The copolymer scale inhibiting dispersant is simple in preparation method, low in cost, low in dosage and good in scale inhibiting dispersion effect, does not contain phosphorus, is environmental-friendly, can be widely applied to an industrial circulating cooling water system, and has relatively high economic and social benefits.

Description

technical field [0001] The invention relates to the field of circulating cooling water treatment, in particular to a non-phosphorous copolymer scale inhibitor dispersant and a preparation method thereof. Background technique [0002] With the scale of industrial production and the rapid increase of population, water resources are seriously scarce. Circulating cooling water consumption accounts for 60-70% of industrial water consumption, and reasonable saving of circulating cooling water is the most direct way to reduce industrial water consumption. The main way to save circulating cooling water is to increase the recycling rate of circulating cooling water, which not only increases the concentration multiple, but this will bring serious corrosion and scaling problems to the circulating water system, and puts forward higher requirements for the water treatment process. Require. In order to ensure the normal operation of the circulating water system under the conditions of h...

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Problems solved by technology

[0004] There are many domestic patents on polycarboxylate scale inhibitors and dispersants, such as CN01123146 "low molecular weight (meth)acrylic acid (salt) polymer and its preparation method and use", CN94117281.3 "multidimensional polycarboxylate water treatment However, with the continuous development of the industrial circulating cooling water treatment process, the complexity and variability of the circulating water system have gradually deepened, and higher requirements have been put forward for the adaptability of water treatment chemicals.

At the same time, there are more and more types of water treatment chemicals. Sometimes a circulating water system routinely needs to add 5 to 8 kinds of chemicals, which greatly increases the cost of circulating water treatment and increases the complexity of circulating water treatment.

Moreover, adding multiple water quality stabilizers at the same time is likely to produce conflicting effects, reduce the efficacy, and get half the result with twice the effort

In addition, most of the scale inhibitors and dispersants that have been published and applied contain phosphorus. When these scale inhibitors and dispersants enter the circulating water system, they can provide rich nutrients for bacteria and algae in the water, are easily decomposed, and will increase the size of the circulating water system. The difficulty of sterilization and algae removal affects the stable operation of the circulating water system

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