■熔鹽電加熱器：

　　熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)電加(jia)(jia)(jia)(jia)熱(re)器(qi)是一種電加(jia)(jia)(jia)(jia)熱(re)設(she)(she)備,用(yong)(yong)于對流(liu)動的(de)(de)(de)(de)液(ye)態(tai)(tai)(tai)、氣(qi)態(tai)(tai)(tai)介(jie)質的(de)(de)(de)(de)升(sheng)溫、保溫、加(jia)(jia)(jia)(jia)熱(re)。熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)電加(jia)(jia)(jia)(jia)熱(re)器(qi)利用(yong)(yong)特殊(shu)管狀(zhuang)電熱(re)元(yuan)件結合(he)法蘭集束的(de)(de)(de)(de)形式與壓力容器(qi)組成(cheng)(cheng)(cheng)一個供(gong)熱(re)整體,利用(yong)(yong)加(jia)(jia)(jia)(jia)熱(re)二元(yuan)熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)或(huo)三(san)元(yuan)熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)作(zuo)為加(jia)(jia)(jia)(jia)熱(re)介(jie)質。一般這(zhe)種加(jia)(jia)(jia)(jia)熱(re)方式與熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐組成(cheng)(cheng)(cheng)一個整體,當(dang)常(chang)溫下的(de)(de)(de)(de)硝鹽(yan)(yan)(yan)倒(dao)入(ru)熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐中以后，利用(yong)(yong)熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)罐內的(de)(de)(de)(de)少量電熱(re)元(yuan)件給(gei)(gei)其預熱(re)，使之(zhi)變為液(ye)態(tai)(tai)(tai)，然后通過(guo)熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)泵抽取熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)往加(jia)(jia)(jia)(jia)熱(re)器(qi)內部(bu)流(liu)，進一步給(gei)(gei)熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)增溫，到達熔(rong)(rong)(rong)(rong)(rong)(rong)鹽(yan)(yan)(yan)加(jia)(jia)(jia)(jia)熱(re)器(qi)出口處已經基本(ben)完(wan)成(cheng)(cheng)(cheng)加(jia)(jia)(jia)(jia)熱(re)的(de)(de)(de)(de)目的(de)(de)(de)(de)，并與用(yong)(yong)戶的(de)(de)(de)(de)用(yong)(yong)熱(re)設(she)(she)備形成(cheng)(cheng)(cheng)一個循環的(de)(de)(de)(de)整體，源源不斷的(de)(de)(de)(de)給(gei)(gei)其加(jia)(jia)(jia)(jia)熱(re)，從而滿足(zu)工藝的(de)(de)(de)(de)要求。

■熔鹽電加熱器應用范圍：

　　 熔鹽電加(jia)熱器廣泛應用于(yu)儲能(neng)、儲熱、火電調(diao)峰、化肥、三(san)聚氫胺、氧化鋁等高溫加(jia)熱生產工藝(yi)。

■熔鹽電加熱器控制系統概述：

　　1、有常規的(de)電氣保護，如流量和短(duan)路保護等。

　　2、有一套獨立于溫度控(kong)制(zhi)的超(chao)溫報(bao)警系統，當電加熱器內部溫度超(chao)過計定值(zhi)時，它將不可(ke)自(zi)動復位(wei)地關閉電加熱器，并輸出一個觸(chu)點信(xin)號(hao)。

　　3、有一(yi)套獨立的低液位報警，當液位低于要求(qiu)值時，它(ta)將自動關閉(bi)電加熱器，并輸(shu)出一(yi)個信號。

　　4、提(ti)供(gong)數個聯鎖接口(kou)，以便和其它(ta)設備如(ru)泵、流(liu)量(liang)（壓力）開關等裝置聯鎖，確保加熱(re)器加熱(re)時(shi)有一定流(liu)量(liang)的(de)(de)介質在流(liu)動，保證系統(tong)的(de)(de)安(an)全。

　　5、控(kong)制可(ke)以向(xiang)DCS系(xi)統提供加熱系(xi)統處于運行(xing)、停(ting)止、超溫報警、液(ye)位信(xin)號（低液(ye)位報警）、互鎖狀態、溫度(du)信(xin)號（4~20mA）等信(xin)號，除溫度(du)信(xin)號外，它(ta)們均(jun)為無源觸點；可(ke)以接受DCS發出的啟動、停(ting)止操作命令，要求(qiu)的觸點容量亦為220V   1A。

　　6、具有(you)PID溫(wen)(wen)度調(diao)節(jie)功能，加(jia)熱系(xi)(xi)統(tong)可(ke)(ke)以通過程(cheng)序設置介質的升溫(wen)(wen)曲線，并能在流量不足或停止加(jia)熱后(hou)，根據工藝要求(qiu)控(kong)(kong)(kong)制(zhi)泵，本控(kong)(kong)(kong)制(zhi)系(xi)(xi)統(tong)采用多級控(kong)(kong)(kong)制(zhi)技術(shu)，即把加(jia)熱器(qi)分成幾組(zu)(zu)，其中一組(zu)(zu)也就(jiu)是很大的一組(zu)(zu)可(ke)(ke)以無級調(diao)壓，根據出口溫(wen)(wen)度，經運算后(hou)，控(kong)(kong)(kong)制(zhi)系(xi)(xi)統(tong)自動控(kong)(kong)(kong)制(zhi)加(jia)熱器(qi)每組(zu)(zu)的通斷和另一組(zu)(zu)加(jia)熱器(qi)的輸出功率，達到無級調(diao)功。這樣(yang)，能很有(you)效地達到提高控(kong)(kong)(kong)溫(wen)(wen)精度的目的。