■熔鹽電加熱器:
熔(rong)(rong)(rong)鹽(yan)電(dian)(dian)(dian)加(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)(qi)是(shi)一種電(dian)(dian)(dian)加(jia)(jia)(jia)熱(re)(re)(re)(re)設備,用(yong)于對流(liu)動的(de)液態(tai)(tai)、氣態(tai)(tai)介(jie)質的(de)升溫(wen)、保溫(wen)、加(jia)(jia)(jia)熱(re)(re)(re)(re)。熔(rong)(rong)(rong)鹽(yan)電(dian)(dian)(dian)加(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)(qi)利用(yong)特殊管(guan)狀電(dian)(dian)(dian)熱(re)(re)(re)(re)元件(jian)結合(he)法蘭集束的(de)形式(shi)(shi)與(yu)壓力容器(qi)(qi)(qi)組成一個(ge)供(gong)熱(re)(re)(re)(re)整體(ti),利用(yong)加(jia)(jia)(jia)熱(re)(re)(re)(re)二元熔(rong)(rong)(rong)鹽(yan)或三元熔(rong)(rong)(rong)鹽(yan)作為加(jia)(jia)(jia)熱(re)(re)(re)(re)介(jie)質。一般這種加(jia)(jia)(jia)熱(re)(re)(re)(re)方式(shi)(shi)與(yu)熔(rong)(rong)(rong)鹽(yan)罐(guan)組成一個(ge)整體(ti),當常溫(wen)下的(de)硝鹽(yan)倒入熔(rong)(rong)(rong)鹽(yan)罐(guan)中以后,利用(yong)熔(rong)(rong)(rong)鹽(yan)罐(guan)內的(de)少(shao)量電(dian)(dian)(dian)熱(re)(re)(re)(re)元件(jian)給(gei)其預熱(re)(re)(re)(re),使(shi)之(zhi)變為液態(tai)(tai),然后通過(guo)熔(rong)(rong)(rong)鹽(yan)泵抽取熔(rong)(rong)(rong)鹽(yan)往加(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)(qi)內部流(liu),進一步給(gei)熔(rong)(rong)(rong)鹽(yan)增溫(wen),到達(da)熔(rong)(rong)(rong)鹽(yan)加(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)(qi)出(chu)口(kou)處已經基(ji)本(ben)完(wan)成加(jia)(jia)(jia)熱(re)(re)(re)(re)的(de)目的(de),并與(yu)用(yong)戶(hu)的(de)用(yong)熱(re)(re)(re)(re)設備形成一個(ge)循環的(de)整體(ti),源源不斷(duan)的(de)給(gei)其加(jia)(jia)(jia)熱(re)(re)(re)(re),從而滿(man)足工(gong)藝的(de)要求。
■熔鹽(yan)電加熱器應用(yong)范圍:
熔鹽電加熱器(qi)廣泛應(ying)用于儲能、儲熱、火電調峰、化(hua)肥、三聚(ju)氫胺(an)、氧化(hua)鋁等高溫加熱生產(chan)工(gong)藝(yi)。
■熔鹽電加熱器控制系統概述:
1、有(you)常規的電氣保(bao)護(hu),如(ru)流(liu)量和短路保(bao)護(hu)等。
2、有(you)一套獨(du)立于溫(wen)度控(kong)制(zhi)的超(chao)(chao)溫(wen)報警系統,當電加熱器內部溫(wen)度超(chao)(chao)過(guo)計(ji)定值時,它將不可自動(dong)復位地關(guan)閉電加熱器,并輸出(chu)一個觸點信號。
3、有一套獨立的(de)低液位(wei)報警,當液位(wei)低于要求(qiu)值(zhi)時,它(ta)將(jiang)自動(dong)關閉電加熱器(qi),并(bing)輸出(chu)一個信號。
4、提供數個聯(lian)鎖接口,以(yi)便和(he)其它設備如泵、流(liu)(liu)量(壓力)開關(guan)等裝置(zhi)聯(lian)鎖,確(que)保(bao)加熱器加熱時有一(yi)定流(liu)(liu)量的(de)介質在流(liu)(liu)動,保(bao)證系(xi)統(tong)的(de)安全。
5、控制可(ke)以向(xiang)DCS系(xi)統(tong)提供加熱系(xi)統(tong)處于運(yun)行、停止(zhi)、超溫報(bao)警、液位(wei)信(xin)號(低液位(wei)報(bao)警)、互(hu)鎖狀態、溫度信(xin)號(4~20mA)等信(xin)號,除溫度信(xin)號外(wai),它們均為無源觸(chu)點;可(ke)以接受DCS發出的啟動(dong)、停止(zhi)操作(zuo)命令(ling),要求(qiu)的觸(chu)點容量亦為220V 1A。
6、具有(you)(you)PID溫度(du)調節(jie)功能,加(jia)熱(re)(re)(re)(re)系統(tong)(tong)可以通過(guo)程序設置介(jie)質的(de)(de)(de)升溫曲線,并能在流量不(bu)足或(huo)停止加(jia)熱(re)(re)(re)(re)后(hou),根據工藝要求控(kong)制(zhi)泵,本控(kong)制(zhi)系統(tong)(tong)采用多級(ji)(ji)控(kong)制(zhi)技術(shu),即把加(jia)熱(re)(re)(re)(re)器分成幾組,其中一組也就是(shi)很大的(de)(de)(de)一組可以無級(ji)(ji)調壓,根據出口溫度(du),經運算后(hou),控(kong)制(zhi)系統(tong)(tong)自動控(kong)制(zhi)加(jia)熱(re)(re)(re)(re)器每組的(de)(de)(de)通斷和(he)另一組加(jia)熱(re)(re)(re)(re)器的(de)(de)(de)輸(shu)出功率,達到(dao)無級(ji)(ji)調功。這樣,能很有(you)(you)效地(di)達到(dao)提高控(kong)溫精度(du)的(de)(de)(de)目(mu)的(de)(de)(de)。