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As people Environmental protection Increase awareness of pulp Papermaking More and more attention to wastewater treatment. In the pulp and paper wastewater, whether middle or White Water water contain more fiber and other solids, the effective fiber and other solids and wastewater will be separated, not only can reduce the fiber loss, but also increase the wastewater treatment recycling, reducing waste water discharge, water conservation, can reduce the wastewater biological treatment follow-up to load, reduce waste Water Treatment Cost.
Our current fiber pulp and paper waste by recycling most of flotation, sedimentation and filtration. Flotation and sedimentation exists a large investment in equipment, covers an area of large, unstable operation, fiber impurity content is high, consumption of chemicals and more expensive to run fiber to stay a long time, perishable and other shortcomings. Filtration is the key equipment filter, widely used in multi-disc filter, there is a large investment in equipment, manufacturing high demand required for the formation of a vacuum water leg or use of the device frame, high vacuum pumps, high operating costs, unloading more difficult , filter blocking and other shortcomings of Netease, as poorly run domestic equipment, mostly imported.
New corrugated surface porous filter to overcome the shortcomings of these devices is a cost-effective waste water filtration equipment, pulp and paper industry in China has broad application prospects.
New corrugated surface characteristics of microporous filter:
New corrugated surface porous filter can be used for mid-water treatment, paper machine white water recovery and purification of raw water, has the following significant advantages:
(1) use of corrugated filter surface, filter area than flat drumhead to increase 3 to 5 times, in the same filter area, the area greatly reduced, layout and flexibility. Can be used to focus on waste water can also be configured with a single machine.
(2) use the form within the filter surface, solids collection tank can be installed on the central drum, drum increased the operational level, increased level difference inside and outside the drum, can increase the filtering capabilities, to get high purity the mix with.
(3) use the form within the filter surface, so that unloading easier, without the use of scraper or roller, greatly extending the life of the filter can be installed very small filter, the minimum mesh up to 20 m, and even 10 m.
(4) unique air cleaning system to discharge discharge clean, reliable recovery of solids (or fiber) concentration was higher (up to 4% ~ 6%), easy to handle. If recyclables do not need higher concentrations, they can use water spray discharge.
(5) using fiber filter removable corrugated heat setting on the grid on the form, convenient for network, eliminating the need for plates and other structure, porosity greatly increased, further increasing the effective filtration area.
(6) simple, low cost, low investment; filtration drum speed adjustable, the flow of the treated water and concentration of adaptability.
(7) simple, low cost, no atmospheric water leg or vacuum pumps, low energy consumption, 155m2 microfiltration unit can be driven only 4kW motor.
(8) low speed (up to 2.5r/min), long life, low maintenance costs.
(9) most of the time to clarify the use of equipment within the water self-cleaning filter, greatly reducing the amount of fresh water.
(10) solids (or fiber) and water residence time in the filter is only tens of seconds, therefore, solid (or fiber) in rot greatly reduced, recycled material can be used effectively.
(11), except in certain special circumstances to be adding a small amount of pre-linked polymer layer or outside, without chemicals or additives to help the operation.
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