Brine refining scale inhibition and dispersion agent as well as preparation method and application thereof

Abstract

The invention relates to a brine refining scale inhibition and dispersion agent as well as a preparation method and application thereof. The brine refining scale inhibition and dispersion agent is mainly prepared from the following raw materials in percentage by mass: 20-60% of an itaconic acid-acrylic acid copolymer solution; 5%-30% of a maleic anhydride-acrylic acid copolymer solution; 5%-20% ofa polyaspartic acid solution; 5%-20% of a polyepoxysuccinic acid solution; 0.5%-2% of a stabilizer; and 5%-25% of water; the preparation method comprises the following steps: selecting an itaconic acid-acrylic acid copolymer solution, a maleic anhydride-acrylic acid copolymer solution, a polyaspartic acid solution, a polyepoxysuccinic acid solution, a stabilizer and water as raw materials of thescale inhibition and dispersion agent; and screening the proportions of all the components, so that excellent scale inhibition and dispersion effects can be achieved on substances such as CaSO4 and CaCO3 generated in the process of refining and separating calcium, magnesium and sulfate ions from brine, and CaSO4 and CaCO3 crystals are effectively prevented from naturally forming on the surface ofan equipment pipeline to form scales.

Description

technical field [0001] The invention belongs to the technical field of scale inhibitors, and in particular relates to a refined brine scale inhibitor dispersant and its preparation method and application. Background technique [0002] The scientific name of brine is brine, which is a mixture of sodium chloride, calcium chloride, magnesium sulfate, etc., and often contains Na + , Ca 2+ , Mg 2+ , Cl - , SO 4 2- , CO 3 2- 、HCO 3 - Plasma, as far as vacuum salt production is concerned, the existence of calcium, magnesium, and sulfate radicals will not only affect product quality, but also calcium sulfate, magnesium sulfate, sodium sulfate, calcium carbonate and other substances will be formed in the production process Such crystallized form adheres to the surface of system equipment and pipelines, causing fouling and blockage, greatly reducing the volume of vacuum tanks, low heat transfer efficiency, high energy consumption and a series of problems. [0003] Therefore,...

AI Technical Summary

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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