攪拌器的(de)類型、尺寸及轉速,對(dui)(dui)攪(jiao)拌(ban)(ban)功率在總體(ti)流(liu)動(dong)和湍流(liu)脈動(dong)之間(jian)的(de)分配(pei)都有(you)(you)影響。一般說來,渦輪式攪(jiao)拌(ban)(ban)器(qi)(qi)的(de)功率分配(pei)對(dui)(dui)湍流(liu)脈動(dong)有(you)(you)利,而旋槳式攪(jiao)拌(ban)(ban)器(qi)(qi)對(dui)(dui)總體(ti)流(liu)動(dong)有(you)(you)利。
對(dui)于(yu)同(tong)一類型的攪拌器來說,在功(gong)率消耗相同(tong)的條件下,大直徑、低(di)轉速的攪拌器,功(gong)率主要消耗于(yu)總體流動,有利于(yu)宏觀混合。
攪(jiao)拌(ban)(ban)(ban)(ban)器攪(jiao)拌(ban)(ban)(ban)(ban)功(gong)率(lv)(lv)(lv)的根本(ben)計算辦法:理(li)論(lun)上(shang)固然(ran)可將攪(jiao)拌(ban)(ban)(ban)(ban)功(gong)率(lv)(lv)(lv)分(fen)為攪(jiao)拌(ban)(ban)(ban)(ban)器功(gong)率(lv)(lv)(lv)和攪(jiao)拌(ban)(ban)(ban)(ban)作(zuo)業(ye)功(gong)率(lv)(lv)(lv)兩個方面思(si)索,但在理(li)論(lun)中普通只思(si)索或主要思(si)索攪(jiao)拌(ban)(ban)(ban)(ban)器功(gong)率(lv)(lv)(lv),因攪(jiao)拌(ban)(ban)(ban)(ban)作(zuo)業(ye)功(gong)率(lv)(lv)(lv)很難予以測(ce)定(ding),普通經過設定(ding)攪(jiao)拌(ban)(ban)(ban)(ban)器的轉速來滿足到達所需的攪(jiao)拌(ban)(ban)(ban)(ban)作(zuo)業(ye)功(gong)率(lv)(lv)(lv)。
影響(xiang)攪拌功率(lv)的(de)主要(yao)要(yao)素如下(xia):
1、攪拌槽的構造參數,如(ru)攪拌槽內徑和(he)高度、有(you)無(wu)擋板或導流筒、擋板的寬度和(he)數量、導流筒直徑等(deng)。
2、攪(jiao)(jiao)拌(ban)器(qi)的構造和(he)運(yun)轉(zhuan)參數,如攪(jiao)(jiao)拌(ban)器(qi)的型式(shi)、槳葉直徑和(he)寬度、槳葉的傾角(jiao)、槳葉數量、攪(jiao)(jiao)拌(ban)器(qi)的轉(zhuan)速等。
3、攪拌介(jie)質(zhi)的物(wu)性,如(ru)各介(jie)質(zhi)的密(mi)度、液相(xiang)介(jie)質(zhi)黏(nian)度、固體顆粒大小(xiao)、氣體介(jie)質(zhi)通氣率等。