Recycling and reusing method of pulping deinking sludge

Abstract

The invention discloses a recycling and reusing method of pulping deinking sludge. The recycling and reusing method includes three units which are concentration treatment of deinking sludge, use of deinking sludge after concentration, and waste water treatment of deinking sludge concentration. The concentration treatment of deinking sludge is carried out by collecting the deinking sludge after floating selection to a sludge storage tank, and adding macromolecular agglomeration in the sludge storage tank under a stirring state; after the sludge is agglomerated to be particle, conveying the sludge mixture to a sludge extruding dewatering system, concentrating and dewatering the sludge; the use of deinking sludge after concentration is carried out by re-feeding the deinking sludge after partially concentration to a pulping system of a white-faced craft paper; directly delivering the rest concentration deinking sludge to a power station to incinerate; the waste water treatment of deinkingsludge concentration is carried out by making waste water generated from the deinking sludge concentration enter a white water circulating system to purify; recycling the waste water. The recycling and reusing method of pulping deinking sludge can safely and effectively treat the deinking sludge, save waste paper raw material amount and filler dosage, reduce the sludge disposal load, and reduce the production cost.

Description

Technical field [0001] The invention relates to a method for recycling and reusing pulping deinking sludge, which belongs to the technical field of papermaking. Background technique [0002] Waste paper is an important renewable resource. The recycling of waste paper has important meanings such as saving raw materials, reducing pollution, reducing energy consumption, and reducing costs. The utilization of waste paper resources is a major feature of the development of my country's paper industry, and the rise of waste paper has pushed the development of my country's paper industry. From 2007 to 2012, my country’s waste paper consumption increased sharply at a rate of about 3 million tons per year, and then the growth rate gradually slowed down. In 2016, the waste paper pulp consumption reached 63.29 million tons (equivalent to 79.11 million tons of waste paper), accounting for 65 of the total pulp consumption. %. [0003] Like other papermaking processes, some solid wastes such as...

AI Technical Summary

Problems solved by technology

Scholars at home and abroad have conducted in-depth research on the treatment of deinking sludge, and developed some resource utilization technologies for deinking sludge, such as: recovering energy from deinking sludge and using fillers early, making deinking sludge New technologies for resource utilization such as slabs, soil improvers, composite material fillers and asphalt composite modifiers, but there are technical problems such as high investment and difficult implementation

Deinking sludge is perishable and smelly, if not properly treated, it will cause serious secondary pollution

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