■熔鹽電加熱器:
熔(rong)(rong)(rong)(rong)鹽(yan)電(dian)(dian)加(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)是一(yi)種電(dian)(dian)加(jia)(jia)(jia)熱(re)(re)設(she)(she)備(bei),用(yong)(yong)(yong)于(yu)對流(liu)動的(de)(de)(de)液(ye)態(tai)、氣(qi)態(tai)介(jie)質(zhi)(zhi)的(de)(de)(de)升溫(wen)(wen)、保(bao)溫(wen)(wen)、加(jia)(jia)(jia)熱(re)(re)。熔(rong)(rong)(rong)(rong)鹽(yan)電(dian)(dian)加(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)利用(yong)(yong)(yong)特(te)殊管狀電(dian)(dian)熱(re)(re)元件(jian)結合法蘭集束的(de)(de)(de)形式(shi)與壓(ya)力(li)容(rong)器(qi)(qi)(qi)組(zu)(zu)成(cheng)一(yi)個供熱(re)(re)整體,利用(yong)(yong)(yong)加(jia)(jia)(jia)熱(re)(re)二元熔(rong)(rong)(rong)(rong)鹽(yan)或三元熔(rong)(rong)(rong)(rong)鹽(yan)作(zuo)為加(jia)(jia)(jia)熱(re)(re)介(jie)質(zhi)(zhi)。一(yi)般這種加(jia)(jia)(jia)熱(re)(re)方式(shi)與熔(rong)(rong)(rong)(rong)鹽(yan)罐(guan)組(zu)(zu)成(cheng)一(yi)個整體,當常(chang)溫(wen)(wen)下(xia)的(de)(de)(de)硝鹽(yan)倒入熔(rong)(rong)(rong)(rong)鹽(yan)罐(guan)中以后,利用(yong)(yong)(yong)熔(rong)(rong)(rong)(rong)鹽(yan)罐(guan)內的(de)(de)(de)少量電(dian)(dian)熱(re)(re)元件(jian)給(gei)(gei)其(qi)預熱(re)(re),使(shi)之變(bian)為液(ye)態(tai),然后通過熔(rong)(rong)(rong)(rong)鹽(yan)泵抽(chou)取熔(rong)(rong)(rong)(rong)鹽(yan)往加(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)內部(bu)流(liu),進一(yi)步給(gei)(gei)熔(rong)(rong)(rong)(rong)鹽(yan)增溫(wen)(wen),到(dao)達熔(rong)(rong)(rong)(rong)鹽(yan)加(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)出口(kou)處已經(jing)基本(ben)完(wan)成(cheng)加(jia)(jia)(jia)熱(re)(re)的(de)(de)(de)目的(de)(de)(de),并與用(yong)(yong)(yong)戶的(de)(de)(de)用(yong)(yong)(yong)熱(re)(re)設(she)(she)備(bei)形成(cheng)一(yi)個循環的(de)(de)(de)整體,源源不斷的(de)(de)(de)給(gei)(gei)其(qi)加(jia)(jia)(jia)熱(re)(re),從而(er)滿足工(gong)藝(yi)的(de)(de)(de)要求(qiu)。
■熔(rong)鹽電加熱器應用范圍:
熔鹽電加熱(re)器廣(guang)泛應用于儲(chu)能、儲(chu)熱(re)、火電調峰、化肥、三(san)聚氫(qing)胺、氧(yang)化鋁等(deng)高溫(wen)加熱(re)生產工藝。
■熔鹽電加(jia)熱器(qi)控制系統概述:
1、有(you)常(chang)規的電氣保護(hu),如流量和短路保護(hu)等。
2、有一套獨立(li)于溫(wen)度控制(zhi)的超溫(wen)報警系統,當電加熱(re)器內部溫(wen)度超過計(ji)定值(zhi)時,它(ta)將(jiang)不可自動復位地關閉電加熱(re)器,并輸出一個觸(chu)點(dian)信號。
3、有一套獨立的低液(ye)位(wei)(wei)報(bao)警,當液(ye)位(wei)(wei)低于(yu)要求(qiu)值時,它將自動關(guan)閉電加熱器,并輸出一個信號。
4、提(ti)供數個聯(lian)(lian)鎖接口,以便和其(qi)它(ta)設備如泵、流量(壓力(li))開關等裝置聯(lian)(lian)鎖,確保加(jia)熱器加(jia)熱時有(you)一定(ding)流量的(de)介(jie)質在流動,保證系統的(de)安全。
5、控制(zhi)可以(yi)向DCS系統(tong)(tong)提供加熱系統(tong)(tong)處于運行、停止(zhi)、超溫報警、液位信號(hao)(低液位報警)、互(hu)鎖狀態、溫度信號(hao)(4~20mA)等信號(hao),除溫度信號(hao)外(wai),它們均為無源觸點(dian);可以(yi)接受DCS發出的啟動、停止(zhi)操作(zuo)命令(ling),要求的觸點(dian)容量亦(yi)為220V 1A。
6、具(ju)有(you)PID溫(wen)(wen)(wen)度調(diao)節功能(neng),加熱系(xi)統(tong)可以(yi)通過程序(xu)設置介質的升溫(wen)(wen)(wen)曲(qu)線,并能(neng)在(zai)流量不足(zu)或停(ting)止加熱后,根據工藝(yi)要求控(kong)制(zhi)泵,本控(kong)制(zhi)系(xi)統(tong)采用(yong)多級(ji)控(kong)制(zhi)技(ji)術,即把加熱器分成幾組(zu),其(qi)中一(yi)組(zu)也就是(shi)很(hen)大的一(yi)組(zu)可以(yi)無級(ji)調(diao)壓,根據出(chu)口(kou)溫(wen)(wen)(wen)度,經運算后,控(kong)制(zhi)系(xi)統(tong)自動(dong)控(kong)制(zhi)加熱器每組(zu)的通斷和另(ling)一(yi)組(zu)加熱器的輸出(chu)功率(lv),達(da)到無級(ji)調(diao)功。這樣(yang),能(neng)很(hen)有(you)效(xiao)地達(da)到提高控(kong)溫(wen)(wen)(wen)精(jing)度的目的。
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