饮用水处理用活性炭废炭的粉磨能耗

Grinding energy consumption of spent activated carbon from drinking water treatment

利用水厂活性炭废炭和行星式球磨机分别进行废炭干、湿法粉磨实验,激光粒径仪测定粉磨产物的粒径d_(50)值,在罗辛-拉姆勒粒径特性方程基础上研究干、湿法粉磨方式和磨机转速对产物d_(50)值和能耗的影响,建立废炭粉磨能耗模型,并用实际能耗值对模型进行验证。结果表明,干、湿法粉磨条件下,随能耗增加,产物d_(50)值和粒径模数均先减小后趋于平缓;在200~300 r/min转速范围内,浆料质量比为40%的湿法粉磨较干法粉磨易获得更小d_(50)值、比能耗更低、粒径分布范围更窄的粉磨产物;粉磨方式、磨机转速均影响废炭粉磨能耗;以罗辛-拉姆勒粒径特性方程为基础的能耗方程适用于行星式球磨机粉磨废炭过程。

A-kind-of-spent-activated-carbon-was-derived-from-a-drinking-water-treatment-plant,-and-then-was-grinded-in-planetary-ball-mill-with-or-and-dry-methods.-The-index-of-particle-size-distribution-d50of-grinding-products-were-valuated-by-laser-particle-analyzer.-The-effects-of-grinding-methods-and-rotational-speed-on-d50and-energy-consumptions-of-grinding-products-were-investigated-based-on-Rosin-Rammler-distribution-model.-The-energy-consumption-models-were-established,-and-then-were-verified-by-experimental-values.-The-results-show-that-the-values-of-d50and-size-modulus-reduce-first-and-then-stable-in-a-certain-value-with-the-increase-of-energy-consumption-during-dry-or-wet-grinding.-Comparing-with-dry-grinding-in-the-rang-of-200-to-300-r/min-rotational-speed,-a-wet-grinding-at-40%-solid-mass-concentration-is-conducive-to-obtain-the-grinding-product-with-smaller-d50-and-narrower-size-distribution-in-lower-energy-consumption.-The-energy-consumptions-of-grinding-spent-activated-carbon-are-highly-affected-by-rotational-speeds-and-grinding-methods-including-wet-or-dry.-The-established-energy-consumption-models-which-are-based-on-Rosin-Rammler-distribution-model-can-be-applied-in-the-grinding-process-of-spent-activated-carbon-with-planetary-ball-mill.