A sticky matter control method suitable for large coated paper machines

Abstract

The present invention provides a sticky control method suitable for large-scale coated paper machines. Three sticky control agents are synchronously added to the wet end system of the paper machine, including: a passivating agent, a fixing agent and a combined dispersant; The passivator is added to the outlet of the coating dry damage defibrator in the wet end system; the fixative is added to the suction side of the pump suction side at the outlet of the dry damage metering tank in the wet end system; the combined dispersant is added to the white water in the wet end system medium; the passivating agent is a cationic polymer with low charge density and low molecular weight; the fixing agent is a cationic polymer with medium charge density and medium molecular weight; the combined dispersant is a compound composed of anionic dispersant and nonionic surfactant objects; the present invention can effectively control the number and size of stickies formed, and the effect of the sticky control agent is stable, improving the cleanliness and stability of the wet end system, and reducing the broken holes caused by sticky deposits. Paper problems, improve the efficiency of paper machine operation, and improve the quality of paper.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for controlling stickies suitable for large coated paper machines. Background technique [0002] The glue in the production process of large-scale coated paper usually comes partly from the natural resin in wood, and the other part comes from the white resin formed by latex, starch, etc. in broken paper and fillers. In the process of paper machine production, the wet end system in the papermaking system will inevitably produce stickies, and the excessive quantity or volume of stickies will have a negative impact on the operation of the paper machine and the quality of paper. [0003] At present, the removal of stickies in the wet-end system is mainly aimed at the removal and control of stickies in broken paper; existing domestic paper companies usually use the method of adding a single-component sticky control agent to reduce and control the generation of stickies, ...

AI Technical Summary

Problems solved by technology

[0003] At present, the removal of stickies in the wet-end system is mainly aimed at the removal and control of stickies in broken paper; existing domestic paper companies usually use the method of adding a single-component sticky control agent to reduce and control the generation of stickies, but the existing single stickies control agent has a single mechanism of action, and the control effect on stickies in large high-speed paper machine systems is limited, and because the system of large high-speed paper machines is relatively closed and complicated , the addition position of the existing sticky matter control agent is unreasonable, so that the purpose of effectively controlling the sticky matter in the wet end system cannot be achieved all the time. There is a sharp drop, and the control effect of stickies is extremely unstable, which eventually makes the production of the paper machine in a bad state due to the precipitation and coagulation of stickies, which affects the operating efficiency of the paper machine and reduces the quality of the product.

Images