White Water In Paper Making Process
Paper industry is one of the largest water and sewage industries, according to the source of return water can be divided into thickener white water, paper machine white water and papermaking wastewater.
Thickener white water
Thickener white water: thickener white paper includes bleached pulp transported to the paper shop through the thickener produced white water, white paper concentrated by thickener machine from break pulp and white water produced by white water recycling machine.
1. Thickener white water from bleached pulp in addition to containing small fibers, it also contains residual chlorine, which is not washed after bleaching, and the degraded substances produced during the bleaching process. These traits are mixed in the pulp and produce a large amount of foam, residual chlorine content of the slurry is too high, will reduce the effect of variety of additives added during the paper making process.
2. Thickener white water from break pulp: in addition to containing small fibers, but also contains fillers and a variety of additives, white water concentration is generally about 0.05%.
3. White water recycling machine produced white water, containing small fibers: fillers and a variety of additives, the white water concentration is generally 0.005 ~ 0.01%.
Paper machine white water
Thick white water: general the white water filtered from forming areafront of the wire (dehydration board) called thick white water, high concentrations of up to 0.3%. The white water produced by the high pressure differential dehydration zone (vacuum suction box and couch roll) is called dilute white water, and the white water concentration is 0.06 to 0.08%.
The white water recovery can reduce the fiber loss, Leizhan supply high quality paper machine and design the project for paper making friends to maximize the benefits and the lowest fiber loss, if you have any need or questions, welcome to consult us.
