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...