■熔鹽電加熱器：

　　熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)電加(jia)熱(re)(re)(re)(re)器(qi)(qi)是(shi)一種(zhong)電加(jia)熱(re)(re)(re)(re)設備(bei),用(yong)于對流動(dong)的(de)液態(tai)、氣態(tai)介(jie)(jie)質的(de)升(sheng)溫、保溫、加(jia)熱(re)(re)(re)(re)。熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)電加(jia)熱(re)(re)(re)(re)器(qi)(qi)利(li)(li)用(yong)特殊(shu)管狀電熱(re)(re)(re)(re)元(yuan)件(jian)結合法蘭集(ji)束的(de)形式與(yu)壓(ya)力容(rong)器(qi)(qi)組成(cheng)(cheng)一個(ge)供熱(re)(re)(re)(re)整(zheng)體,利(li)(li)用(yong)加(jia)熱(re)(re)(re)(re)二元(yuan)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)或三元(yuan)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)作(zuo)為(wei)加(jia)熱(re)(re)(re)(re)介(jie)(jie)質。一般這(zhe)種(zhong)加(jia)熱(re)(re)(re)(re)方式與(yu)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)罐組成(cheng)(cheng)一個(ge)整(zheng)體,當常溫下的(de)硝鹽(yan)(yan)(yan)(yan)(yan)倒入熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)罐中以后(hou)，利(li)(li)用(yong)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)罐內(nei)的(de)少量(liang)電熱(re)(re)(re)(re)元(yuan)件(jian)給(gei)(gei)其預熱(re)(re)(re)(re)，使之(zhi)變為(wei)液態(tai)，然(ran)后(hou)通過熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)泵抽取熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)往加(jia)熱(re)(re)(re)(re)器(qi)(qi)內(nei)部流，進一步給(gei)(gei)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)增(zeng)溫，到達熔(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)加(jia)熱(re)(re)(re)(re)器(qi)(qi)出(chu)口(kou)處已(yi)經基本完成(cheng)(cheng)加(jia)熱(re)(re)(re)(re)的(de)目的(de)，并與(yu)用(yong)戶的(de)用(yong)熱(re)(re)(re)(re)設備(bei)形成(cheng)(cheng)一個(ge)循環的(de)整(zheng)體，源源不(bu)斷的(de)給(gei)(gei)其加(jia)熱(re)(re)(re)(re)，從(cong)而滿足工藝的(de)要求。

■熔鹽電加熱器應用范圍：

　　 熔鹽電加熱器廣泛應用于儲能、儲熱、火(huo)電調峰、化肥、三聚氫胺、氧(yang)化鋁等高溫(wen)加熱生產工藝(yi)。

■熔鹽電(dian)加(jia)熱器控(kong)制系統概述(shu)：

　　1、有常規的電氣保(bao)護，如流量和短路保(bao)護等(deng)。

　　2、有一(yi)套獨立于溫(wen)度控制的超溫(wen)報警系統，當電加熱器(qi)內部溫(wen)度超過計定值時，它將不可(ke)自動復位地關閉電加熱器(qi)，并(bing)輸出一(yi)個觸點信(xin)號(hao)。

　　3、有一套獨立(li)的低(di)液位報(bao)警，當液位低(di)于要求值時(shi)，它(ta)將自動關閉(bi)電(dian)加熱(re)器，并輸出一個信號。

　　4、提供數(shu)個聯(lian)鎖(suo)接口，以(yi)便和其(qi)它設備如泵(beng)、流(liu)量（壓力(li)）開關等裝置(zhi)聯(lian)鎖(suo)，確保加熱器加熱時有一定(ding)流(liu)量的(de)介質在流(liu)動，保證(zheng)系統的(de)安全(quan)。

　　5、控(kong)制可以(yi)向DCS系(xi)統提供加熱系(xi)統處于運(yun)行、停(ting)止(zhi)、超溫報(bao)警、液(ye)位信(xin)號(hao)(hao)(hao)（低液(ye)位報(bao)警）、互鎖狀(zhuang)態、溫度信(xin)號(hao)(hao)(hao)（4~20mA）等信(xin)號(hao)(hao)(hao)，除溫度信(xin)號(hao)(hao)(hao)外，它(ta)們(men)均為無源觸點(dian)；可以(yi)接受DCS發出的啟動、停(ting)止(zhi)操作命令，要求的觸點(dian)容量亦為220V   1A。

　　6、具有(you)PID溫(wen)度調節功(gong)能(neng)，加熱(re)系統(tong)可以通過程序(xu)設置介質的(de)(de)升溫(wen)曲線，并能(neng)在流量不足或(huo)停止加熱(re)后(hou)，根據(ju)工藝(yi)要求控(kong)制(zhi)(zhi)泵，本控(kong)制(zhi)(zhi)系統(tong)采用多級控(kong)制(zhi)(zhi)技(ji)術，即把加熱(re)器分(fen)成幾組，其中一(yi)組也就是很(hen)大的(de)(de)一(yi)組可以無(wu)級調壓，根據(ju)出(chu)口溫(wen)度，經(jing)運(yun)算后(hou)，控(kong)制(zhi)(zhi)系統(tong)自(zi)動控(kong)制(zhi)(zhi)加熱(re)器每組的(de)(de)通斷和另一(yi)組加熱(re)器的(de)(de)輸(shu)出(chu)功(gong)率，達到無(wu)級調功(gong)。這樣，能(neng)很(hen)有(you)效地達到提高控(kong)溫(wen)精(jing)度的(de)(de)目(mu)的(de)(de)。