A kind of brine refining scale inhibitor and dispersant and its preparation method and application

Abstract

The invention relates to a brine-refined scale inhibitor and dispersant, a preparation method and application thereof. The brine-refined scale inhibitor and dispersant is mainly prepared from the following raw materials in mass percentage: itaconic acid-acrylic acid copolymer solution 20%-60% %; maleic anhydride-acrylic acid copolymer solution 5%-30%; polyaspartic acid solution 5%-20%; polyepoxysuccinic acid solution 5%-20%; stabilizer 0.5%-2%; water 5 %~25%; the present invention selects itaconic acid-acrylic acid copolymer solution, maleic anhydride-acrylic acid copolymer solution, polyaspartic acid solution, polyepoxysuccinic acid solution and stabilizer, water as scale inhibitor and dispersant raw materials, and screen the proportion of each component, which can be used for CaSO produced in the process of refining and separating calcium, magnesium and sulfate ions from brine. 4 , CaCO 3 and other substances play an excellent scale inhibition and dispersion effect, effectively preventing CaSO 4 , CaCO 3 Crystals naturally form on the surface of equipment pipes to form scale.

Description

technical field [0001] The invention belongs to the technical field of scale inhibitors, and particularly relates to a brine refining scale inhibitor and dispersant and a preparation method and application thereof. Background technique [0002] The scientific name of brine is salt brine, which is a mixture of sodium chloride, calcium chloride, magnesium sulfate, etc. The brine often contains Na + , Ca 2+ , Mg 2+ , Cl - , SO 4 2- , CO 3 2- , HCO 3 - Plasma, in terms of vacuum salt production, the existence of calcium, magnesium and sulfate will not only affect product quality, but also calcium, magnesium, sulfate and other substances in the production process as calcium sulfate, magnesium sulfate, sodium sulfate, calcium carbonate. The form of isocrystalline adheres to the surface of system equipment and pipelines, resulting in a series of problems such as fouling and blockage, greatly reducing the volume of the vacuum tank, low heat transfer efficiency, and high ene...

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Problems solved by technology

[0008] The object of the present invention is to: the CaSO2 that exists in the process of refining brine when making salt in the prior art is low to the removal rate of calcium, magnesium, sulfate radical etc., waste residue is many and forms 4 , CaCO 3 Such technical problems as extremely easy to accumulate and form scale, high removal cost, and limited application range of removal means, the present invention provides a scale inhibitor dispersant and its preparation method and application. The scale inhibitor dispersant is used in the brine refining process, Can effectively prevent CaSO 4 , CaCO 3 Crystals are naturally formed on the surface of equipment pipes to form scales, but after they are dispersed, they are discharged in a controlled manner at the subsequent settlement site, avoiding CaSO 4 , CaCO 3 Such substances continue to accumulate and scale, causing equipment and pipeline blockage, greatly reducing the volume of the vacuum tank, low heat transfer efficiency, and high energy consumption. At the same time, the scale inhibitor dispersant has the advantages of low cost, easy industrial application, and environmental friendliness.

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