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 1 Products 
 The Nutshell filter development and production of light filter for oily wastewater treatment. Materials based on high quality thick pecan shell, after crushing, high temperature cooking and repeated screening processed, the appearance of yellow with no rot, no spots, toughness. 
 Characteristics of performance of this filter high hardness, wear resistance, good resistance to stress, not easily dissolved in acid and alkaline solution. Ability of adsorption interception in the absorption rate of 27-50%, hydrophilic, anti-oil-immersed, easy backwashing and regeneration can be directly used to backwash the filter before the water, low operating cost, easy management, etc., is an ideal of environmental protection equipment filler material. 
 [Use] in the petroleum, petrochemical enterprises and other environmental protection projects, the oil-water separator water treatment device, automatic control, water filters, sewage filters, into the well filter. 
 Second, the Nutshell filter 
 Nutshell media because of their hardness, the ideal proportion of porous and multi-faceted, and its pigment, fat, grease, electricity to pay the special physical and chemical treatment (ion removal clean), making water treatment more strong degreasing properties, in addition to the excellent performance of the solid particles, easy backwashing, widely used in the oily wastewater treatment, industrial wastewater treatment and residential water treatment. Is replaced by quartz sand filter, to improve water quality, a significant reduction in water treatment costs of a new generation of media. 
 Of Nutshell filter chemical properties 
 Test items to test data test items of test data 
 90-95% of the oil removal efficiency of backwashing strength 25m3/m2.h 
 Suspended solids removal of 95-98% water rinse pressure 0.32mPa 
 Filtration rate, 20-25m / h maintenance way to add a 5-10% per year 
 Proportion 1.5g/cm3 heap density 0.8g/cm3 
 (A) Features 
 1, with the many and porous, and interception in power, oil and suspended solids removal. 
 2, has a multi-row and different particle sizes, the formation of deep bed filtration, enhanced oil capacity and filtration rate. 
 3, has a hydrophilic lipophilic and appropriate proportion of backwash, regeneration and strong. 
 4, hardness and corrosion, no special treatment is not easy to replace filter would only add 10% per year, and reduce maintenance costs and maintenance time, increased utilization. 
 (B) use 
 An oily wastewater treatment: to oil and suspended solids. 
 2, Industrial Oily industrial water treatment: to the oil and suspended solids. 
 3, the civilian water and industrial water treatment: removal of suspended solids, and improve water quality. 
 Walnut shell filter is the quality of pecan shells as raw material, after crushing, polishing, steam cleaning, drug treatment, twice the filter from the processing of a water treatment filter. Walnut shell filter has a high hardness, wear resistance, resistance to stress anti pressure 23.4kgf, and stable chemical properties, not acid-base dissolved, adsorbed pollutant entrapment, adsorption rate of 27-50%, hydrophilic, anti-oil-immersed and so on. 

 Walnut shell filter because of their hardness, the ideal proportion of porous and multi-faceted, and its pigment, fat, grease, electricity to pay the special physical and chemical treatment (ion removal clean), making water treatment more strong degreasing properties, in addition to the excellent performance of solid particles, easy backwashing, walnut shell filter has been widely used in the oily wastewater treatment, industrial wastewater treatment and residential water treatment. Is replaced by quartz sand filter, to improve water quality, a significant reduction in water treatment costs of a new generation of media. Beijing Forestry University, the Scientific Research Test Center of Shandong Province, Jiangsu Province Institute of Environmental Protection determination, under pressure particle size 1.25-1.60mm walnut shell particles, the average compression limit 0.2295KN (23.40kgf). Particle size 0.80-1.00mm walnut shell particles, the average ultimate compression for 0.165KN (16.84kgf). Chemically stable, free of toxic substances, acids, alkalis, dissolved in water is very small, walnut shells in hydrochloric acid solution in the loss of 4.99%, a loss rate of 3.8% sodium hydroxide solution, does not cause water quality deterioration phenomenon. 

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