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攪拌器的介紹及選擇

2020-09-27 20:34

①旋槳式(shi)攪拌器

  專業攪(jiao)(jiao)拌器(qi)由2~3片(pian)推進式螺旋槳(jiang)(jiang)葉構(gou)成(cheng),工(gong)作轉速(su)較高(gao),葉片(pian)旋槳(jiang)(jiang)式攪(jiao)(jiao)拌器(qi)外緣的(de)(de)圓周速(su)度(du)一般為5~15m/s。旋槳(jiang)(jiang)式攪(jiao)(jiao)拌器(qi)主要(yao)造成(cheng)軸向(xiang)(xiang)液(ye)流,產生較大的(de)(de)循環(huan)量,適用(yong)于攪(jiao)(jiao)拌低粘度(du) (<2Pa·s)液(ye)體、乳濁液(ye)及固體微粒含量低于10%的(de)(de)懸浮液(ye)。攪(jiao)(jiao)拌器(qi)的(de)(de)轉軸也(ye)可水平或(huo)斜向(xiang)(xiang)插入(ru)槽內,此時(shi)液(ye)流的(de)(de)循環(huan)回路不對稱,可增加湍動,防止液(ye)面(mian)凹陷(xian)。

②蝸輪(lun)式攪拌器

  由(you)在(zai)水平(ping)圓(yuan)盤上安(an)裝2~4片平(ping)直的(de)(de)或彎(wan)曲(qu)的(de)(de)葉(xie)片所構(gou)成。渦輪(lun)式攪(jiao)拌(ban)器(15張(zhang))槳葉(xie)的(de)(de)外徑、寬度(du)與高(gao)(gao)度(du)的(de)(de)比例,一般為20:5:4,圓(yuan)周速(su)度(du)一般為 3~8m/s。渦輪(lun)在(zai)旋轉時造(zao)成高(gao)(gao)度(du)湍動(dong)的(de)(de)徑向(xiang)流動(dong),適用(yong)于氣體及不互溶(rong)液(ye)體的(de)(de)分散和(he)液(ye)液(ye)相反應過程。被攪(jiao)拌(ban)液(ye)體的(de)(de)粘(zhan)度(du)一般不超過25Pa·s。

③槳式攪拌器

  有平槳式(shi)和斜(xie)槳式(shi)兩(liang)種(zhong)。平槳式(shi)攪(jiao)拌器(qi)由兩(liang)片平直槳葉構成。槳斜(xie)槳式(shi)攪(jiao)拌器(qi)

葉(xie)直徑與高度(du)(du)之比為 4~10,圓周速度(du)(du)為1.5~3m/s,所(suo)產(chan)生的(de)徑向液流速度(du)(du)較小(xiao)。斜槳(jiang)式攪拌器的(de)兩葉(xie)相反折(zhe)轉45°或60°,因而產(chan)生軸向液流。槳(jiang)式攪拌器結構簡(jian)單,常用于低粘度(du)(du)液體的(de)混(hun)合以及固體微粒的(de)溶(rong)解(jie)和(he)懸浮。

④錨式(shi)攪(jiao)拌器

  槳葉(xie)外(wai)(wai)緣(yuan)(yuan)形狀與(yu)攪拌(ban)(ban)(ban)槽內壁要一致,其間僅有錨式攪拌(ban)(ban)(ban)器(qi)很(hen)小間隙,可清(qing)除附在(zai)槽壁上的(de)粘性(xing)反應產物或堆積于槽底的(de)固體(ti)物,保持較(jiao)好的(de)傳熱效果。槳葉(xie)外(wai)(wai)緣(yuan)(yuan)的(de)圓(yuan)周(zhou)速度為(wei)0.5~1.5m/s,可用于攪拌(ban)(ban)(ban)粘度高(gao)達(da) 200Pa·s的(de)牛(niu)頓型流(liu)(liu)體(ti)和(he)擬塑性(xing)流(liu)(liu)體(ti)(見粘性(xing)流(liu)(liu)體(ti)流(liu)(liu)動。唯攪拌(ban)(ban)(ban)高(gao)粘度液(ye)體(ti)時, 液(ye)層中有較(jiao)大的(de)停滯區(qu)。

⑤螺帶式攪拌(ban)器(qi)

  螺(luo)帶(dai)的外徑與(yu)螺(luo)距相(xiang)等,專門用(yong)于攪拌高粘度液(ye)體(ti)(200~500Pa·s)及擬(ni)塑(su)性(xing)流體(ti),通常(chang)在層流狀(zhuang)態下操作(zuo)。

⑥磁力(li)攪拌器

Corning數字(zi)式加熱器帶有一個(ge)閉路旋鈕來監(jian)控與調(diao)節攪(jiao)拌速度。 微處(chu)理器自動調(diao)節馬達(da)動力(li)去適應水質、粘性溶液與半固體溶液。

⑦磁(ci)力(li)加(jia)熱攪拌器

  Corning數字(zi)式加熱攪拌器帶有可選的外部溫度(du)(du)控(kong)制器 (Cat. No. 6795PR) ,他們還可以監(jian)控(kong)與(yu)控(kong)制容器中(zhong)的溫度(du)(du)。

⑧折(zhe)葉(xie)式攪拌器(qi)

  根(gen)據不同(tong)介質(zhi)的(de)(de)物理學性質(zhi)、容量、攪拌(ban)(ban)目的(de)(de)選擇相應的(de)(de)攪拌(ban)(ban)器,對促進(jin)化學反應速度、提高生產效率能起到很(hen)大的(de)(de)作用。折葉渦輪攪拌(ban)(ban)器一般適應于氣(qi)、液相混合(he)的(de)(de)反應,攪拌(ban)(ban)器轉數一般應選擇300r/min以上。

⑨變頻(pin)雙層攪拌器

  變(bian)頻攪拌器的底座、支桿、電動機使用專利技術固(gu)定為(wei)一體。專利夾頭,無松動、無搖擺(bai)、不會(hui)脫(tuo)落(luo),安全可靠。

  攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)選(xuan)(xuan)型(xing)(xing)(xing)步(bu)驟分析介紹   攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)裝置(zhi)的(de)(de)(de)設(she)(she)(she)計(ji)(ji)(ji)選(xuan)(xuan)型(xing)(xing)(xing)與攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)作(zuo)(zuo)業目(mu)(mu)的(de)(de)(de)緊(jin)密結合(he)。各(ge)(ge)種不同的(de)(de)(de)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)過(guo)(guo)(guo)程(cheng)需要(yao)(yao)由(you)不同的(de)(de)(de)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)裝置(zhi)運(yun)行來(lai)(lai)實(shi)(shi)現,在(zai)設(she)(she)(she)計(ji)(ji)(ji)選(xuan)(xuan)型(xing)(xing)(xing)時(shi)首先要(yao)(yao)根據(ju)工(gong)(gong)藝(yi)(yi)對攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)作(zuo)(zuo)業的(de)(de)(de)目(mu)(mu)的(de)(de)(de)和(he)要(yao)(yao)求,確定(ding)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)型(xing)(xing)(xing)式(shi)、電(dian)(dian)動機(ji)(ji)(ji)(ji)功率(lv)(lv)、攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)速(su)度(du)(du),然(ran)后選(xuan)(xuan)擇(ze)減(jian)(jian)速(su)機(ji)(ji)(ji)(ji)、機(ji)(ji)(ji)(ji)架(jia)(jia)、攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)軸(zhou)(zhou)(zhou)、軸(zhou)(zhou)(zhou)封等各(ge)(ge)部件(jian)(jian)。共具體步(bu)驟方法如下:   1.按(an)(an)(an)照(zhao)(zhao)工(gong)(gong)藝(yi)(yi)條(tiao)件(jian)(jian)、攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)目(mu)(mu)的(de)(de)(de)和(he)要(yao)(yao)求,選(xuan)(xuan)擇(ze)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)型(xing)(xing)(xing)式(shi),選(xuan)(xuan)擇(ze)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)型(xing)(xing)(xing)式(shi)時(shi)應充分掌(zhang)握攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)動力特性(xing)和(he)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)在(zai)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)過(guo)(guo)(guo)程(cheng)中(zhong)所(suo)產生的(de)(de)(de)流(liu)動狀態與各(ge)(ge)種攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)目(mu)(mu)的(de)(de)(de)的(de)(de)(de)因果關系。   2.按(an)(an)(an)照(zhao)(zhao)所(suo)確定(ding)的(de)(de)(de)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)型(xing)(xing)(xing)式(shi)及攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)在(zai)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)過(guo)(guo)(guo)程(cheng)中(zhong)所(suo)產生的(de)(de)(de)流(liu)動狀態,工(gong)(gong)藝(yi)(yi)對攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)混(hun)合(he)時(shi)間(jian)(jian)、沉降速(su)度(du)(du)、分散度(du)(du)的(de)(de)(de)控制要(yao)(yao)求,通過(guo)(guo)(guo)實(shi)(shi)驗手段和(he)計(ji)(ji)(ji)算機(ji)(ji)(ji)(ji)模擬設(she)(she)(she)計(ji)(ji)(ji),確定(ding)電(dian)(dian)動機(ji)(ji)(ji)(ji)功率(lv)(lv)、攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)速(su)度(du)(du)、攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)器(qi)(qi)(qi)(qi)(qi)直徑。   3.按(an)(an)(an)照(zhao)(zhao)電(dian)(dian)動機(ji)(ji)(ji)(ji)功率(lv)(lv)、攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)轉速(su)及工(gong)(gong)藝(yi)(yi)條(tiao)件(jian)(jian),從減(jian)(jian)速(su)機(ji)(ji)(ji)(ji)選(xuan)(xuan)型(xing)(xing)(xing)表中(zhong)選(xuan)(xuan)擇(ze)確定(ding)減(jian)(jian)速(su)機(ji)(ji)(ji)(ji)機(ji)(ji)(ji)(ji)型(xing)(xing)(xing)。如果按(an)(an)(an)照(zhao)(zhao)實(shi)(shi)際(ji)工(gong)(gong)作(zuo)(zuo)扭(niu)矩(ju)來(lai)(lai)選(xuan)(xuan)擇(ze)減(jian)(jian)速(su)機(ji)(ji)(ji)(ji),則實(shi)(shi)際(ji)工(gong)(gong)作(zuo)(zuo)扭(niu)矩(ju)應小(xiao)于減(jian)(jian)速(su)機(ji)(ji)(ji)(ji)許用扭(niu)矩(ju)。   4.按(an)(an)(an)照(zhao)(zhao)減(jian)(jian)速(su)機(ji)(ji)(ji)(ji)的(de)(de)(de)輸出軸(zhou)(zhou)(zhou)頭d和(he)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)軸(zhou)(zhou)(zhou)系支承方式(shi)選(xuan)(xuan)擇(ze)與d相(xiang)同型(xing)(xing)(xing)號規格的(de)(de)(de)機(ji)(ji)(ji)(ji)架(jia)(jia)、聯軸(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)   5.按(an)(an)(an)照(zhao)(zhao)機(ji)(ji)(ji)(ji)架(jia)(jia)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)軸(zhou)(zhou)(zhou)頭do尺(chi)寸、安(an)裝容納空間(jian)(jian)及工(gong)(gong)作(zuo)(zuo)壓(ya)力、工(gong)(gong)作(zuo)(zuo)溫度(du)(du)選(xuan)(xuan)擇(ze)軸(zhou)(zhou)(zhou)封型(xing)(xing)(xing)式(shi)   6.按(an)(an)(an)照(zhao)(zhao)安(an)裝形式(shi)和(he)結構要(yao)(yao)求,設(she)(she)(she)計(ji)(ji)(ji)選(xuan)(xuan)擇(ze)攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)軸(zhou)(zhou)(zhou)結構型(xing)(xing)(xing)式(shi),并校檢(jian)其強(qiang)度(du)(du)、剛度(du)(du)。   如按(an)(an)(an)剛性(xing)軸(zhou)(zhou)(zhou)設(she)(she)(she)計(ji)(ji)(ji),在(zai)滿足(zu)強(qiang)度(du)(du)條(tiao)件(jian)(jian)下n/nk≤0.7   如按(an)(an)(an)柔性(xing)軸(zhou)(zhou)(zhou)設(she)(she)(she)計(ji)(ji)(ji),在(zai)滿足(zu)強(qiang)度(du)(du)條(tiao)件(jian)(jian)下n/nk>=1.3   7.按(an)(an)(an)照(zhao)(zhao)機(ji)(ji)(ji)(ji)架(jia)(jia)的(de)(de)(de)公(gong)稱(cheng)心寸DN、攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)軸(zhou)(zhou)(zhou)的(de)(de)(de)擱軸(zhou)(zhou)(zhou)型(xing)(xing)(xing)式(shi)及壓(ya)力等級(ji)、選(xuan)(xuan)擇(ze)安(an)裝底蓋、凸緣(yuan)底座或凸緣(yuan)法蘭   8.按(an)(an)(an)照(zhao)(zhao)支承和(he)抗振(zhen)條(tiao)件(jian)(jian),確定(ding)是否配(pei)置(zhi)輔助支承。   在(zai)以上選(xuan)(xuan)型(xing)(xing)(xing)過(guo)(guo)(guo)程(cheng)中(zhong),攪(jiao)(jiao)(jiao)(jiao)拌(ban)(ban)(ban)(ban)(ban)(ban)裝置(zhi)的(de)(de)(de)組合(he)、配(pei)置(zhi)過(guo)(guo)(guo)程(cheng)中(zhong)各(ge)(ge)部件(jian)(jian)之間(jian)(jian)連接關鍵尺(chi)寸是軸(zhou)(zhou)(zhou)頭尺(chi)寸,軸(zhou)(zhou)(zhou)頭尺(chi)寸一致的(de)(de)(de)各(ge)(ge)部件(jian)(jian)原則上可互換、組合(he)。