■熔鹽電加熱器:
熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)電(dian)(dian)加(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)(qi)是一種電(dian)(dian)加(jia)(jia)(jia)熱(re)(re)(re)(re)設備(bei),用(yong)于對流(liu)(liu)動的(de)液態(tai)、氣態(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)(rong)鹽(yan)(yan)(yan)電(dian)(dian)加(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)(qi)利(li)用(yong)特殊管狀電(dian)(dian)熱(re)(re)(re)(re)元(yuan)(yuan)件結合法蘭集束(shu)的(de)形(xing)(xing)式(shi)與壓力容器(qi)(qi)(qi)組(zu)(zu)成一個供熱(re)(re)(re)(re)整(zheng)體,利(li)用(yong)加(jia)(jia)(jia)熱(re)(re)(re)(re)二元(yuan)(yuan)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)或(huo)三(san)元(yuan)(yuan)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)作為加(jia)(jia)(jia)熱(re)(re)(re)(re)介(jie)質。一般這(zhe)種加(jia)(jia)(jia)熱(re)(re)(re)(re)方式(shi)與熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐組(zu)(zu)成一個整(zheng)體,當常溫(wen)下的(de)硝鹽(yan)(yan)(yan)倒入熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐中以后,利(li)用(yong)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐內的(de)少量電(dian)(dian)熱(re)(re)(re)(re)元(yuan)(yuan)件給其預熱(re)(re)(re)(re),使之變為液態(tai),然后通(tong)過熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)泵抽取(qu)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)往(wang)加(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)(qi)內部(bu)流(liu)(liu),進一步給熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)增溫(wen),到達熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)加(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)(qi)出口(kou)處(chu)已經基(ji)本完成加(jia)(jia)(jia)熱(re)(re)(re)(re)的(de)目的(de),并與用(yong)戶的(de)用(yong)熱(re)(re)(re)(re)設備(bei)形(xing)(xing)成一個循環(huan)的(de)整(zheng)體,源源不斷(duan)的(de)給其加(jia)(jia)(jia)熱(re)(re)(re)(re),從(cong)而滿足工藝的(de)要求。
■熔鹽電加熱器應用(yong)范(fan)圍:
熔鹽(yan)電(dian)加熱器(qi)廣泛應用于儲能(neng)、儲熱、火(huo)電(dian)調峰、化肥、三聚氫胺、氧化鋁等高溫(wen)加熱生產工藝(yi)。
■熔(rong)鹽(yan)電加熱器(qi)控制系統概述:
1、有(you)常規的電氣(qi)保(bao)護,如流量(liang)和短路保(bao)護等。
2、有一(yi)套獨立于溫(wen)度控制的超溫(wen)報警系統,當電加(jia)熱器(qi)內部(bu)溫(wen)度超過(guo)計定值時,它將不可自(zi)動(dong)復(fu)位地(di)關閉電加(jia)熱器(qi),并輸出一(yi)個觸點信號(hao)。
3、有一套獨立的低液(ye)位報警,當液(ye)位低于要(yao)求值時(shi),它將(jiang)自動(dong)關閉電加熱器,并輸出(chu)一個信號。
4、提供數個聯(lian)鎖(suo)接口,以便和其它(ta)設備如泵、流量(liang)(壓力)開關等裝置(zhi)聯(lian)鎖(suo),確(que)保加熱(re)器加熱(re)時有一定流量(liang)的介質(zhi)在流動,保證系統的安(an)全。
5、控制可以(yi)向DCS系(xi)統提供加熱(re)系(xi)統處于運行(xing)、停止、超溫(wen)報(bao)警、液位信(xin)(xin)號(低液位報(bao)警)、互鎖狀(zhuang)態、溫(wen)度信(xin)(xin)號(4~20mA)等信(xin)(xin)號,除溫(wen)度信(xin)(xin)號外,它們均為無源觸(chu)點(dian);可以(yi)接受DCS發出的(de)(de)啟動、停止操作命令,要求(qiu)的(de)(de)觸(chu)點(dian)容量亦(yi)為220V 1A。
6、具有PID溫(wen)度(du)調(diao)節功(gong)能,加熱(re)系統可(ke)以通過程序設置介(jie)質的升(sheng)溫(wen)曲(qu)線(xian),并能在流量不足或停止加熱(re)后,根據工藝(yi)要求(qiu)控制(zhi)泵,本控制(zhi)系統采用多(duo)級(ji)控制(zhi)技術,即把加熱(re)器分成(cheng)幾(ji)組(zu),其中一組(zu)也(ye)就是很大的一組(zu)可(ke)以無級(ji)調(diao)壓,根據出口溫(wen)度(du),經運算后,控制(zhi)系統自動控制(zhi)加熱(re)器每組(zu)的通斷和另一組(zu)加熱(re)器的輸出功(gong)率,達到(dao)無級(ji)調(diao)功(gong)。這樣,能很有效地達到(dao)提(ti)高控溫(wen)精度(du)的目的。