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中文 (中国)(1) treatment of water and activated carbon contact time of not less than l0min.
(2) the height of the activated carbon layer is generally 1. 2-2.5m.
(3) operating velocity υ = 7 ~ l0m / h, the design must first consider the choice of a reasonable filtration rate. Under certain carbon layer thickness conditions, the slower the filtration rate the longer the contact time, the longer the contact time the better the effect of activated carbon adsorption effect, the better the water quality.
(4) filtration head loss of 4 ~ 6kPa.
(5) Backwashing swelling rate 2000 ~ 400o (Charcoal bed layer backwashing wash strength to be gradually increased to charcoal bed expansion rate of about 30%, and stable for 10 ~ 15min.In this process, Layer, that is, the size of the redistribution of particles, small particles with the flushing water flow out of the activated carbon filter).
(6) flushing cycle 7 to 15 days; rinse strength 8 ~ 12L / (㎡ s); rinse between 10 ~ 15min. Regular use of large flow washing flushing intensity 15 ~ 20L / (m2 · S); flushing time 10-15min. Washing water using filtered water or carbon filter water, requiring turbidity of less than 3 °.
It is noteworthy that the activated carbon filter to the chlorine effect often occurs in the upper filter, and not handled properly, the bacteria in the following carbon layer in the breeding and spread. Therefore, the leak may lead to resin contamination, so steam or hot water on a regular basis for disinfection of activated carbon is necessary.