■熔鹽電加熱器:
熔(rong)(rong)(rong)鹽(yan)(yan)(yan)電(dian)(dian)加(jia)熱(re)(re)(re)(re)(re)(re)器(qi)(qi)是(shi)一(yi)(yi)種電(dian)(dian)加(jia)熱(re)(re)(re)(re)(re)(re)設(she)(she)備(bei),用(yong)(yong)于對流動的液(ye)態、氣態介質的升(sheng)溫、保溫、加(jia)熱(re)(re)(re)(re)(re)(re)。熔(rong)(rong)(rong)鹽(yan)(yan)(yan)電(dian)(dian)加(jia)熱(re)(re)(re)(re)(re)(re)器(qi)(qi)利用(yong)(yong)特殊(shu)管(guan)狀電(dian)(dian)熱(re)(re)(re)(re)(re)(re)元(yuan)件(jian)結合法(fa)蘭集束(shu)的形(xing)式與壓力容器(qi)(qi)組成一(yi)(yi)個(ge)供熱(re)(re)(re)(re)(re)(re)整體,利用(yong)(yong)加(jia)熱(re)(re)(re)(re)(re)(re)二元(yuan)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)或三元(yuan)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)作為加(jia)熱(re)(re)(re)(re)(re)(re)介質。一(yi)(yi)般這種加(jia)熱(re)(re)(re)(re)(re)(re)方式與熔(rong)(rong)(rong)鹽(yan)(yan)(yan)罐組成一(yi)(yi)個(ge)整體,當常溫下的硝鹽(yan)(yan)(yan)倒(dao)入熔(rong)(rong)(rong)鹽(yan)(yan)(yan)罐中以(yi)后,利用(yong)(yong)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)罐內(nei)的少(shao)量電(dian)(dian)熱(re)(re)(re)(re)(re)(re)元(yuan)件(jian)給(gei)其預熱(re)(re)(re)(re)(re)(re),使(shi)之變為液(ye)態,然后通過熔(rong)(rong)(rong)鹽(yan)(yan)(yan)泵抽取熔(rong)(rong)(rong)鹽(yan)(yan)(yan)往加(jia)熱(re)(re)(re)(re)(re)(re)器(qi)(qi)內(nei)部流,進一(yi)(yi)步給(gei)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)增溫,到(dao)達熔(rong)(rong)(rong)鹽(yan)(yan)(yan)加(jia)熱(re)(re)(re)(re)(re)(re)器(qi)(qi)出(chu)口(kou)處已經基本完成加(jia)熱(re)(re)(re)(re)(re)(re)的目的,并與用(yong)(yong)戶的用(yong)(yong)熱(re)(re)(re)(re)(re)(re)設(she)(she)備(bei)形(xing)成一(yi)(yi)個(ge)循環的整體,源(yuan)源(yuan)不斷(duan)的給(gei)其加(jia)熱(re)(re)(re)(re)(re)(re),從而滿足(zu)工(gong)藝的要求。
■熔鹽(yan)電加熱器應用(yong)范圍:
熔鹽(yan)電加熱(re)器廣(guang)泛應用于儲能、儲熱(re)、火電調峰、化肥、三聚(ju)氫胺、氧化鋁等高溫加熱(re)生產工藝(yi)。
■熔鹽電(dian)加熱器控制系統概述:
1、有常規的電氣(qi)保(bao)護,如流量和短路保(bao)護等。
2、有一(yi)套獨(du)立于(yu)溫度控制的超(chao)溫報警系統,當電加(jia)熱器內(nei)部溫度超(chao)過計定(ding)值時,它將不可自動復位地(di)關閉電加(jia)熱器,并輸(shu)出一(yi)個觸(chu)點信號。
3、有一套獨立的低液位(wei)報(bao)警,當液位(wei)低于要求值時,它將(jiang)自動(dong)關閉電加(jia)熱器,并輸出一個信號。
4、提供數個聯鎖(suo)接(jie)口,以便和其(qi)它設備如(ru)泵、流量(壓力)開關等裝置(zhi)聯鎖(suo),確保加熱(re)器加熱(re)時有一定(ding)流量的介質(zhi)在流動,保證系統的安(an)全。
5、控制可(ke)以向(xiang)DCS系統提供加熱系統處于運行、停(ting)止、超(chao)溫(wen)報警、液位(wei)信(xin)(xin)號(低液位(wei)報警)、互(hu)鎖狀態、溫(wen)度(du)信(xin)(xin)號(4~20mA)等(deng)信(xin)(xin)號,除(chu)溫(wen)度(du)信(xin)(xin)號外,它們均(jun)為無源觸點;可(ke)以接受DCS發(fa)出的(de)啟動、停(ting)止操作命令,要求的(de)觸點容量亦(yi)為220V 1A。
6、具有(you)PID溫度(du)調節(jie)功能(neng),加(jia)熱系(xi)統可以通過程序設置介質的(de)升溫曲線,并(bing)能(neng)在流(liu)量不(bu)足(zu)或停止加(jia)熱后(hou),根(gen)據工藝要求控(kong)制(zhi)泵,本控(kong)制(zhi)系(xi)統采用多(duo)級(ji)(ji)控(kong)制(zhi)技(ji)術,即把加(jia)熱器分成幾(ji)組(zu),其中一(yi)(yi)組(zu)也就是(shi)很大的(de)一(yi)(yi)組(zu)可以無級(ji)(ji)調壓,根(gen)據出口溫度(du),經運(yun)算后(hou),控(kong)制(zhi)系(xi)統自動控(kong)制(zhi)加(jia)熱器每(mei)組(zu)的(de)通斷和另一(yi)(yi)組(zu)加(jia)熱器的(de)輸出功率(lv),達(da)到無級(ji)(ji)調功。這(zhe)樣,能(neng)很有(you)效地達(da)到提高控(kong)溫精度(du)的(de)目的(de)。