■熔鹽電加熱器:
熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)電加(jia)熱(re)(re)(re)(re)(re)器(qi)(qi)(qi)是一(yi)種電加(jia)熱(re)(re)(re)(re)(re)設備,用(yong)于(yu)對流動(dong)的(de)(de)(de)(de)液(ye)態(tai)、氣態(tai)介(jie)(jie)質的(de)(de)(de)(de)升溫(wen)、保溫(wen)、加(jia)熱(re)(re)(re)(re)(re)。熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)電加(jia)熱(re)(re)(re)(re)(re)器(qi)(qi)(qi)利(li)用(yong)特殊管狀電熱(re)(re)(re)(re)(re)元件(jian)結合法蘭集束的(de)(de)(de)(de)形式與壓力容(rong)器(qi)(qi)(qi)組成一(yi)個供熱(re)(re)(re)(re)(re)整(zheng)體(ti),利(li)用(yong)加(jia)熱(re)(re)(re)(re)(re)二元熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)或三元熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)作為加(jia)熱(re)(re)(re)(re)(re)介(jie)(jie)質。一(yi)般這種加(jia)熱(re)(re)(re)(re)(re)方式與熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐(guan)組成一(yi)個整(zheng)體(ti),當常溫(wen)下的(de)(de)(de)(de)硝鹽(yan)(yan)(yan)倒(dao)入(ru)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐(guan)中以后(hou),利(li)用(yong)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐(guan)內的(de)(de)(de)(de)少量電熱(re)(re)(re)(re)(re)元件(jian)給其(qi)預(yu)熱(re)(re)(re)(re)(re),使之變(bian)為液(ye)態(tai),然(ran)后(hou)通過熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)泵(beng)抽取熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)往加(jia)熱(re)(re)(re)(re)(re)器(qi)(qi)(qi)內部(bu)流,進一(yi)步給熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)增溫(wen),到(dao)達熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)加(jia)熱(re)(re)(re)(re)(re)器(qi)(qi)(qi)出口處已經(jing)基本(ben)完成加(jia)熱(re)(re)(re)(re)(re)的(de)(de)(de)(de)目的(de)(de)(de)(de),并(bing)與用(yong)戶的(de)(de)(de)(de)用(yong)熱(re)(re)(re)(re)(re)設備形成一(yi)個循環的(de)(de)(de)(de)整(zheng)體(ti),源源不斷的(de)(de)(de)(de)給其(qi)加(jia)熱(re)(re)(re)(re)(re),從而(er)滿(man)足工藝(yi)的(de)(de)(de)(de)要求。
■熔鹽電加熱(re)器應用范圍:
熔鹽電(dian)加熱器(qi)廣泛應用(yong)于儲能、儲熱、火(huo)電(dian)調峰、化(hua)肥、三聚氫(qing)胺、氧化(hua)鋁(lv)等高溫加熱生產工藝。
■熔鹽(yan)電(dian)加熱器控制(zhi)系統(tong)概述:
1、有常規的電氣保(bao)護,如流(liu)量和(he)短路保(bao)護等。
2、有一套獨立于溫(wen)(wen)度控制(zhi)的超溫(wen)(wen)報警系統,當電(dian)加熱(re)器(qi)內(nei)部溫(wen)(wen)度超過計(ji)定值時,它(ta)將(jiang)不可(ke)自動(dong)復位(wei)地關閉電(dian)加熱(re)器(qi),并輸出一個(ge)觸點信號(hao)。
3、有一套(tao)獨立(li)的低液(ye)位報警,當液(ye)位低于要求值時,它將自動關(guan)閉電(dian)加熱器,并(bing)輸出一個信號。
4、提(ti)供(gong)數(shu)個(ge)聯(lian)鎖接口,以便和其它設備如(ru)泵(beng)、流(liu)量(壓力)開關等(deng)裝置聯(lian)鎖,確保(bao)(bao)加熱器(qi)加熱時有一(yi)定(ding)流(liu)量的介質在流(liu)動,保(bao)(bao)證系(xi)統的安全(quan)。
5、控(kong)制可以向DCS系(xi)統提供加熱系(xi)統處于運行、停止(zhi)、超溫報(bao)警(jing)、液位信(xin)號(hao)(低液位報(bao)警(jing))、互鎖狀態、溫度信(xin)號(hao)(4~20mA)等信(xin)號(hao),除溫度信(xin)號(hao)外,它們均為(wei)無(wu)源觸(chu)(chu)點(dian);可以接(jie)受DCS發出的啟動、停止(zhi)操作命令,要(yao)求的觸(chu)(chu)點(dian)容量亦為(wei)220V 1A。
6、具有PID溫(wen)(wen)度調節功(gong)(gong)能(neng),加(jia)熱(re)(re)系(xi)統(tong)可以通(tong)過(guo)程序設(she)置介(jie)質的(de)升(sheng)溫(wen)(wen)曲線,并能(neng)在(zai)流量不足或停止(zhi)加(jia)熱(re)(re)后(hou)(hou),根據(ju)工藝要求控(kong)(kong)制泵,本控(kong)(kong)制系(xi)統(tong)采用多級(ji)(ji)控(kong)(kong)制技術,即把加(jia)熱(re)(re)器(qi)分成幾(ji)組(zu)(zu),其中一組(zu)(zu)也就是很大的(de)一組(zu)(zu)可以無級(ji)(ji)調壓,根據(ju)出口(kou)溫(wen)(wen)度,經運算后(hou)(hou),控(kong)(kong)制系(xi)統(tong)自動控(kong)(kong)制加(jia)熱(re)(re)器(qi)每組(zu)(zu)的(de)通(tong)斷和另一組(zu)(zu)加(jia)熱(re)(re)器(qi)的(de)輸出功(gong)(gong)率,達到無級(ji)(ji)調功(gong)(gong)。這樣(yang),能(neng)很有效地達到提高(gao)控(kong)(kong)溫(wen)(wen)精度的(de)目的(de)。