■熔鹽電加熱器:
熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)電(dian)(dian)加(jia)(jia)熱(re)(re)(re)(re)(re)器(qi)是一(yi)種電(dian)(dian)加(jia)(jia)熱(re)(re)(re)(re)(re)設備,用(yong)(yong)于對(dui)流動的(de)(de)液態(tai)、氣態(tai)介(jie)質(zhi)的(de)(de)升溫(wen)、保溫(wen)、加(jia)(jia)熱(re)(re)(re)(re)(re)。熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)電(dian)(dian)加(jia)(jia)熱(re)(re)(re)(re)(re)器(qi)利(li)用(yong)(yong)特殊管狀電(dian)(dian)熱(re)(re)(re)(re)(re)元(yuan)件結(jie)合法(fa)蘭集束的(de)(de)形式(shi)與壓(ya)力容器(qi)組(zu)成一(yi)個(ge)供(gong)熱(re)(re)(re)(re)(re)整(zheng)體,利(li)用(yong)(yong)加(jia)(jia)熱(re)(re)(re)(re)(re)二(er)元(yuan)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)或(huo)三元(yuan)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)作(zuo)為加(jia)(jia)熱(re)(re)(re)(re)(re)介(jie)質(zhi)。一(yi)般這種加(jia)(jia)熱(re)(re)(re)(re)(re)方式(shi)與熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)罐組(zu)成一(yi)個(ge)整(zheng)體,當常溫(wen)下的(de)(de)硝鹽(yan)(yan)(yan)(yan)倒(dao)入熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)罐中以后,利(li)用(yong)(yong)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)罐內的(de)(de)少量電(dian)(dian)熱(re)(re)(re)(re)(re)元(yuan)件給其預熱(re)(re)(re)(re)(re),使(shi)之(zhi)變為液態(tai),然后通過熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)泵抽取熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)往加(jia)(jia)熱(re)(re)(re)(re)(re)器(qi)內部(bu)流,進一(yi)步給熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)增(zeng)溫(wen),到達熔(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)加(jia)(jia)熱(re)(re)(re)(re)(re)器(qi)出口處已經基本完成加(jia)(jia)熱(re)(re)(re)(re)(re)的(de)(de)目的(de)(de),并與用(yong)(yong)戶的(de)(de)用(yong)(yong)熱(re)(re)(re)(re)(re)設備形成一(yi)個(ge)循環的(de)(de)整(zheng)體,源(yuan)源(yuan)不斷的(de)(de)給其加(jia)(jia)熱(re)(re)(re)(re)(re),從而滿足工藝的(de)(de)要(yao)求。
■熔鹽(yan)電(dian)加熱器應用范圍:
熔鹽電加(jia)熱器廣(guang)泛(fan)應用(yong)于儲能、儲熱、火電調峰(feng)、化肥、三(san)聚(ju)氫胺、氧化鋁等高溫(wen)加(jia)熱生(sheng)產工藝(yi)。
■熔鹽電加熱器控(kong)制系統(tong)概述(shu):
1、有常規的電氣(qi)保護(hu),如(ru)流量和短路保護(hu)等。
2、有一套(tao)獨(du)立于溫度(du)(du)控制(zhi)的超(chao)溫報警(jing)系統,當電(dian)加(jia)熱器(qi)內(nei)部溫度(du)(du)超(chao)過計定值時,它(ta)將不(bu)可自動(dong)復位地關閉電(dian)加(jia)熱器(qi),并輸出一個觸點信(xin)號。
3、有一套(tao)獨立(li)的低(di)液(ye)位報(bao)警(jing),當(dang)液(ye)位低(di)于要求值(zhi)時,它將(jiang)自動關閉電加熱器,并輸出一個信號(hao)。
4、提供數個聯鎖接口,以便和(he)其它(ta)設備如泵、流量(壓力)開關等裝置聯鎖,確保加(jia)熱器加(jia)熱時有一(yi)定(ding)流量的介質(zhi)在流動,保證(zheng)系統(tong)的安(an)全。
5、控制可(ke)以向DCS系(xi)(xi)統提供加熱系(xi)(xi)統處于運行(xing)、停(ting)止、超溫報警、液位信號(hao)(hao)(低液位報警)、互鎖(suo)狀態(tai)、溫度(du)信號(hao)(hao)(4~20mA)等信號(hao)(hao),除(chu)溫度(du)信號(hao)(hao)外(wai),它們均(jun)為無源觸點(dian);可(ke)以接受DCS發(fa)出的(de)啟動、停(ting)止操(cao)作命令(ling),要求的(de)觸點(dian)容量亦為220V 1A。
6、具有PID溫(wen)(wen)度(du)調(diao)節功能(neng),加(jia)熱(re)系(xi)統可以通過程(cheng)序設置介質的(de)升溫(wen)(wen)曲線,并能(neng)在(zai)流量不(bu)足或停(ting)止加(jia)熱(re)后,根(gen)據工藝要求控制(zhi)(zhi)泵,本控制(zhi)(zhi)系(xi)統采(cai)用多(duo)級(ji)控制(zhi)(zhi)技術,即把(ba)加(jia)熱(re)器(qi)分(fen)成幾組(zu),其(qi)中一組(zu)也(ye)就(jiu)是很(hen)大的(de)一組(zu)可以無(wu)級(ji)調(diao)壓,根(gen)據出(chu)口溫(wen)(wen)度(du),經運(yun)算后,控制(zhi)(zhi)系(xi)統自動控制(zhi)(zhi)加(jia)熱(re)器(qi)每組(zu)的(de)通斷和另一組(zu)加(jia)熱(re)器(qi)的(de)輸出(chu)功率,達到無(wu)級(ji)調(diao)功。這樣,能(neng)很(hen)有效(xiao)地達到提(ti)高控溫(wen)(wen)精度(du)的(de)目的(de)。