Modification and reuse production method for floatation filter-pressed sludge of white manila board

Abstract

The invention discloses a modification and reuse production method for floatation filter-pressed sludge of a white manila board and belongs to the field of sludge reuse. The modification and reuse production method for the floatation filter-pressed sludge of the white manila board includes the steps that the sludge is screened, heavy slag is removed, and light slag is recycled; activation adjusting is carried out, wherein poly aluminum chloride is added into the sludge, and anionic trash is removed; lotus powder is added into the sludge; retention and drainage are carried out, wherein Hansenula sinensis, poly aluminum chloride and cationic polyacrylamide are added into the sludge, and the sludge is dewatered and conditioned; paper making is carried out, wherein the sludge and pulp needing to be made into paper are mixed according to the ratio of 3:50, and paper is made with the pulp. In the whole process, the sludge is purified, residual fibers in the sludge are utilized to the maximum degree, and environmental friendliness and resource utilization maximization are achieved.

Description

technical field [0001] The invention relates to the field of sludge reuse, in particular to a production method for modifying and recycling flotation filter press sludge coated with gray-bottomed whiteboard. Background technique [0002] The output of modern large-scale coated gray-bottomed whiteboard paper machines is large, and the surface layer DIP (office waste paper deinking line) flotation section, the bottom layer ONP (old newspaper deinking line) flotation section, and the flotation produced by DIP white water air flotation purification section are used. The amount of sludge is large, with a daily output of 2,500 tons. The coated gray-bottomed whiteboard production line produces about 80 tons of flotation sludge per day. The main components of the flotation sludge are fine fibers, fillers, and inks. The flotation sludge passes through the sewage plant It is not conducive to environmental protection to form dried sludge after treatment or to form filter residue after ...

AI Technical Summary

Problems solved by technology

[0002] The output of modern large-scale coated gray-bottomed whiteboard paper machines is large, and the surface layer DIP (office waste paper deinking line) flotation section, the bottom layer ONP (old newspaper deinking line) flotation section, and the flotation produced by DIP white water air flotation purification section are used. The amount of sludge is large, with a daily output of 2,500 tons. The coated gray-bottomed whiteboard production line produces about 80 tons of flotation sludge per day. The main components of the flotation sludge are fine fibers, fillers, and inks. The flotation sludge passes through the sewage plant It is not conducive to environmental protection to form dried sludge after treatment or to form filter residue after press filtration as waste.

The fine fibers and fillers in the flotation sludge are not reused, which is not conducive to the reduction of production costs

Adopting the method of direct discharge to the trench will increase the cost of water treatment in the sewage treatment plant, the cost of dry sludge transportation, and the cost of environmental protection treatment will be high

Adopting the method of transporting the filter residue after press filtration, the cost of foreign transport is high, and the cost of environmental protection treatment is high