Treatment method and device of recycled paper sludge

Abstract

The invention discloses a treatment method of recycled paper sludge, belonging to the technical field of treatment of paper sludge. The treatment method is characterized by adding a magnetizing vibromill activating and micro-milling procedure to a production process, namely sending coarse sand and fiber mixed sludge generated in a recycled paper pulping process and sludge obtained by precipitating paper machine paper wastewater into a mixing and stirring tank to be stirred and then recycling the sludge after activating and micro-milling the sludge in a magnetizing vibromill. The treatment method has the advantages of high sludge treatment efficiency, strong production capacity, high recycled paper raw material utilization rate, low production cost, high recycled paper wet-dry strength, good product quality, good clean production environment and good environments inside and outside plants, is convenient to operate and is widely applicable to recycled paper making enterprises.

Description

technical field [0001] The invention relates to a treatment technology for papermaking sludge, in particular to a treatment method and device for recycled papermaking sludge. Background technique [0002] The solid waste available for recycled paper is produced in the pulping and grit sedimentation process and the papermaking wastewater sedimentation tank. Pulping and grit solid waste is mostly a mixture of fibers, fine sand and coarse sand; sludge from papermaking wastewater sedimentation tanks is mainly short fibers, gray fibers, lime sand and mud. The sludge generated by the traditional recycled paper papermaking method is large (accounting for about 10-20% of recycled paper output) and is difficult to handle. The general manufacturer's treatment method is to filter and dry part of the mixture of fibers, fine sand and coarse sand produced in the process of pulping and grit settling, and then use it as fuel. Due to low heat quality and high treatment costs, the gain outwe...

AI Technical Summary

Problems solved by technology

The part that is not reused is filtered and dried and used as fuel. The same heat quality is low and the treatment cost is high. The long-standing and difficult problems in the industry are due to three aspects. One is the impact of fine sand and lime sand on the quality of papermaking paper. The third is that due to sand removal and other reasons, the waste water has a long residence time, many sedimentation dead spots, pulp rot affects paper quality, and sticking nets and cylinders are mostly caused by colloids in waste paper.

At present, the problem of colloid in waste paper can be solved by adding glue remover to the sticking net and cylinder. However, the sand and fiber mixture in the process of sedimentation sludge of paper machine papermaking wastewater and sand and fiber mixture will have an impact. Paper quality still cannot be effectively utilized