A kind of weak alkaline composite filter element based on natural rock material and preparation method thereof
A composite filter element, natural rock technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of high pH value, no effect, uncontrolled dissolution, etc., and achieve the effect of broad market prospects.
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[0026] The preparation method of the modified medical stone is as follows: the natural medical stone is broken into small particles of 1 to 5 mm, activated in a muffle furnace, and the activation temperature is controlled to increase the temperature to 300°C at a rate of 20°C / min, and then heat up to 300°C at 300°C Activate at a constant temperature of ℃ for 2 hours; then soak in 1mol / L NaCl solution, control the temperature at 80℃, and wash in an ultrasonic environment for 3 hours; then wash in an ultrasonic cleaner with deionized water for 30min, Then fully dry in a ventilated environment at 150°C; then fully grind the cooled medical stone particles, pass through 80-mesh and 200-mesh sieves, and obtain 80-200-mesh modified medical stone.
[0027] The preparation method of the modified serpentine is as follows: the natural serpentine is crushed into small particles of 1-3 mm, washed repeatedly with tap water until no impurities are present; the cleaned natural serpentine is so...
Embodiment 1
[0044] Take by weighing 20g of modified medical stone obtained above, 50g of modified serpentine, 25g of modified limestone, 10g of modified sepiolite, 50g of acid-washed coconut shell activated carbon, 60g of viscose-based activated carbon fiber and uniformly mix to obtain a solid Mixture; add deionized water to the solid mixture and stir fully, mix evenly to make a suspended mixed solution, weigh 20g of carboxymethylcellulose and dissolve it in 500mL of absolute ethanol to obtain the absolute ethanol solution of carboxymethylcellulose , slowly add carboxymethyl cellulose anhydrous ethanol solution into the mixed liquid, stir evenly to make a mixed slurry, put the mixed slurry into a hopper, place it in a mold for pressing, dehydration, and fully dry it at 120°C, Made into a small T size filter element.
[0045] In Example 1, every 2g is one serving.
[0046] According to the requirements of the "Code for Hygienic Safety Evaluation of Drinking Water Transmission and Distribu...
Embodiment 2
[0051] Take by weighing 30g of modified medical stone obtained above, 75g of modified serpentine, 40g of modified limestone, 15g of modified sepiolite, 75g of acid-washed coconut shell activated carbon, and 90g of viscose-based activated carbon fiber to obtain a solid mixture; add deionized water to the solid mixture, stir evenly to obtain a suspended mixed solution; weigh 30g of carboxymethyl cellulose dissolved in 750mL of dehydrated ethanol to obtain carboxymethyl cellulose dehydrated alcohol solution, and carboxymethyl cellulose The absolute ethanol solution of methyl cellulose is slowly added to the mixture, stirred evenly to make a mixed slurry, put into a hopper, placed in a mold for compression molding, dehydration, and fully dried at 120°C to make a large T-size filter element.
[0052] In embodiment 2, every 3g is one portion.
[0053] The large T-size filter element prepared in Example 2 is installed at the end of a 400G pure water machine for continuous water flow,...
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