High-temperature-resistant scale inhibition dispersing agent and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant scale inhibition dispersing agent and a preparation method thereof. The high-temperature-resistant scale inhibition dispersing agent is prepared from the following raw materials in parts by weight: 15-25 parts of hyperbranched macromolecules, 23-47 parts of a multipolymer, 10-15 parts of modified chitosan and 20-45 parts of deionized water. Thehyperbranched macromolecules are organic phosphine hyperbranched macromolecules taking melamine as a core. The multipolymer is prepared by copolymerization of amino acid, carboxylic anhydride and sulfonate. The high-temperature-resistant scale inhibition dispersing agent capable of being used for multistage flash evaporation and sea water desalination systems is prepared from hyperbranched macromolecules, multipolymer and modified chitosan. Compared with the existing similar products, the high-temperature-resistant scale inhibition dispersing agent prepared by the invention has excellent performance and is particularly more outstanding in the aspects of sulfate and silicon scale inhibition, and efficient, energy-saving and stable operation of a multi-effect evaporation and sea water desalination system is realized.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a high-temperature-resistant scale-inhibiting dispersant and a preparation method thereof. Background technique [0002] Water is one of the important energy sources for economic development. With the continuous advancement of industrialization, the contradiction between the rapid development of industry and the relative shortage of water resources has become increasingly prominent. The recycling of a large amount of wastewater in industrial production has become an effective means of water conservation and environmental protection. In order to improve the utilization rate of water resources and meet environmental protection requirements, many enterprises use multi-stage flash evaporation / multi-effect evaporation and other devices to treat high-hardness wastewater, effectively achieving zero discharge. [0003] Evaporator fouling means that the concentrated sa...

AI Technical Summary

Problems solved by technology

After the evaporator and heat exchanger are scaled, the thermal conductivity will be seriously affected, causing the system to fail to operate normally. Once scaled, chemical cleaning must be carried out

Chemical cleaning is time-consuming and labor-intensive, and will cause equipment corrosion and environmental pollution, especially multi-stage flash evaporation / multi-effect evaporation, seawater desalination, etc. are prone to form sulfate scale. Because of its dense structure and generally insoluble in acid, the above-mentioned The antiscalant required for the system must have excellent control over sulfate scale

Patents CN104925968B, CN103449617B and CN107902768A all have reports on high-temperature scale inhibitors, but at present, although the reported products have certain scale inhibition effects on carbonates at high temperatures, they are not effective against sulfates, silicates, etc. The anti-scaling ability is still poor, and it will have an impact on the later salt separation treatment process. The expected effect can only be achieved when the dosage is large in application, and the product itself will pollute the system when used improperly.

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