Special antisludging agent suitable for papermaking black liquid

Abstract

The invention relates to an antisludging agent for papermaking black liquid, in particular to a special antisludging agent suitable for papermaking black liquid. In the treatment process of the papermaking black liquid, due to the influences of the high basicity, high calcium content and other factors of the papermaking black liquid, the papermaking black liquid is very likely to scale in a pipeline and a treatment device of the papermaking black liquid, the treatment effect is reduced, and equipment can be damaged in a severe case. Therefore, antisludging treatment must be carried out on the papermaking black liquid. In an existing treatment technology, usually an antisludging agent is added, and the formulations of antisludging agents adopted in different factories are different. The efficient papermaking black liquid antisludging agent is provided and mainly aims at scale inhibition of the alkaline papermaking black liquid, and the formulation contains orgnanic phosphine, polycarboxylic acid, a polymeric dispersant and sodium hydroxide.

Description

technical field [0001] The invention relates to the antiscaling technology of papermaking black liquor, in particular to a medicament specially used for antiscaling of papermaking black liquor. Background technique [0002] The papermaking industry is one of the important industrial industries in my country. The modern papermaking process can be divided into main steps such as pulping, preparation, papermaking, and processing. Pulping is the first step in papermaking. Generally, wood is converted into pulp. The wastewater produced by the alkaline (caustic soda and sulfate) pulping process of the paper industry contains a large amount of lignin, which is dark brown, so it is called black liquid. Black liquor contains a large amount of suspended solids, organic pollutants and toxic substances, and direct discharge into water bodies will cause serious pollution. Therefore, the treatment of papermaking black liquor is an inevitable requirement of modern environmental protectio...

AI Technical Summary

Problems solved by technology

However, due to the high calcium content and high alkalinity in the black liquor, scaling will form in the pipes and evaporators during the flow and evaporation of the black liquor, which will affect the treatment effect at least, cause equipment shutdown, and cause safety accidents and endanger life at worst. property security

[0003]The current domestic paper-making black liquor scale inhibitor has a single component, the dosage is large, and the treatment effect is poor. Although the foreign paper-making black liquor scale inhibitor is very effective, but The price is relatively high, so it is very necessary to develop a papermaking black liquor scale inhibitor that is resistant to high temperature and suitable for high alkalinity water quality, and has great economic and social benefits