Walnut shell filter is made of high quality pecan shells as raw material, after crushing, polishing, steam cleaning, drug treatment, screening twice the processing of a water filter. Walnut shell filter has a high hardness, wear resistance , compression resistance, resistance to pressure to 23.4kgf, chemical stability, not acid-base dissolved, adsorbed interception ability, adsorption rate of 27-50%, hydrophilic, anti-oil and other advantages.
Walnut shell filter because of their hardness, the ideal proportion, porous and multi-faceted, and by the special physical and chemical treatment (pigments, fat, oil, electricity and pay the ion removal clean), it has a strong in Water Treatment degreasing performance, in addition to solid particles, easy backwashing excellent performance, walnut shell filter has been widely used in oily wastewater treatment, industrial wastewater treatment and residential water treatment. is substituted quartz sand, improve water quality, a significant reduction a new generation of media treatment costs. After Beijing Forestry University, Shandong Academy of Sciences Test Center, Jiangsu Institute of Environmental Protection determined compression capability of a particle size of 1.25-1.60mm walnut shell particles, the average compression limit of 0.2295 KN (23.40kgf). particle size of 0.80-1.00mm walnut shell particles, the average compression limit of 0.165KN (16.84kgf). chemically stable, non-toxic substances, acids, alkalis, dissolved in water is very small, walnut shell loss in hydrochloric acid solution was 4.99%, the loss in sodium hydroxide solution was 3.8%, the phenomenon does not cause deterioration of water quality.
Test items Test items Test Data Test Data
90-95% oil removal backwashing intensity 25m3 / m2`h
95-98% removal of suspended solids rinse water pressure 0.32mPa
Filtration rate 20-25m / h in maintenance mode add 5-10% per annum
Density of 1.25g / cm3 bulk density of 0.8g / cm3
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