Dissolved air flotation machine is mainly used in sewage treatment, so what role does it play in papermaking sewage treatment equipment? Today I will give you a brief introduction.
. The development of a country's economy is closely related to papermaking. It can be said that a country's economy is closely related to the development level of its papermaking. Developed countries occupy a dominant position in the technical field of papermaking, and at the same time, papermaking is High consumption and high pollution are in conflict with the current requirements for low-carbon environmental protection. Therefore, the processing space for papermaking wastewater is still very large. The main equipment is air flotation machine, sludge filter press and upflow pressure screen, etc., which will It is the main equipment for energy saving and consumption reduction in the next plan.
.Everything is contradictory and unified at the same time. Let’s talk about the air flotation machine first. Papermaking requires a lot of water and also produces a lot of sewage. Now after several years of exploration, the dissolved air flotation machine The treatment effect is very good, and it is also the focus of the national environmental protection department. It is still very difficult to achieve zero discharge of papermaking wastewater. The standards currently formulated by the country are national first-level standards. Less than or equal to, the removal rate is around. Such high indicators require the support of good air flotation machine equipment, and at the same time, the use of biochemical first-level atomization treatment, but the fiber recovery in the early stage of the air flotation machine is extremely difficult. importance.
.Sewage undergoes layers of sedimentation, and the first step is the recovery of the microfiltration machine. The correct use of microfiltration machines to recycle fibers can greatly reduce the processing pressure of the air flotation machine, while also achieving secondary utilization of resources, which is one of the effective measures to reduce processing costs.
.There are generally three types of dissolved air flotation machines currently used in China. One is the advection air flotation machine, the other is the cylindrical type, and the third is the shallow air flotation machine.
Treatment effect
. The treatment of papermaking white water and fiber recovery, the recovery rate is more than %, the removal rate is more than %, and the treated water can be recycled.
.Treatment of printing and dyeing wastewater, bleaching, and wool spinning wastewater, removal rate %%. The removal rate is about %, the chromaticity removal rate of direct dyes can reach %%, and the removal rate of various metal ions in electroplating wastewater can reach more than %.
.Removal of car washing wastewater, oil refining wastewater, grease and suspended impurities, the grease can be reduced to / below, and the wastewater can be clarified and reused.
.Removal of organic matter from tannery wastewater, the removal rate is above %, and the suspended solids removal rate is %.
.Removal of impurities such as dye solvents and paints from chemical wastewater, with a removal rate of %%.
. Food, beer, MSG wastewater, removal rate is above %
. Reuse of production cooling water and bathing wastewater, turbidity is less than /.
Air flotation machine equipment Dissolved air flotation machine equipment