■熔鹽電加熱器:
熔(rong)(rong)(rong)(rong)鹽(yan)(yan)電(dian)(dian)加(jia)熱(re)(re)(re)(re)(re)器(qi)是(shi)一種電(dian)(dian)加(jia)熱(re)(re)(re)(re)(re)設備,用(yong)于對流動(dong)的(de)(de)液態、氣態介質的(de)(de)升溫(wen)、保溫(wen)、加(jia)熱(re)(re)(re)(re)(re)。熔(rong)(rong)(rong)(rong)鹽(yan)(yan)電(dian)(dian)加(jia)熱(re)(re)(re)(re)(re)器(qi)利用(yong)特殊管狀(zhuang)電(dian)(dian)熱(re)(re)(re)(re)(re)元件(jian)結合法蘭(lan)集(ji)束的(de)(de)形式與壓(ya)力容器(qi)組(zu)成一個供熱(re)(re)(re)(re)(re)整體,利用(yong)加(jia)熱(re)(re)(re)(re)(re)二元熔(rong)(rong)(rong)(rong)鹽(yan)(yan)或三元熔(rong)(rong)(rong)(rong)鹽(yan)(yan)作為(wei)加(jia)熱(re)(re)(re)(re)(re)介質。一般這種加(jia)熱(re)(re)(re)(re)(re)方式與熔(rong)(rong)(rong)(rong)鹽(yan)(yan)罐(guan)組(zu)成一個整體,當(dang)常溫(wen)下的(de)(de)硝鹽(yan)(yan)倒入(ru)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)罐(guan)中以后,利用(yong)熔(rong)(rong)(rong)(rong)鹽(yan)(yan)罐(guan)內(nei)的(de)(de)少量(liang)電(dian)(dian)熱(re)(re)(re)(re)(re)元件(jian)給其預(yu)熱(re)(re)(re)(re)(re),使之(zhi)變為(wei)液態,然后通(tong)過熔(rong)(rong)(rong)(rong)鹽(yan)(yan)泵抽取熔(rong)(rong)(rong)(rong)鹽(yan)(yan)往加(jia)熱(re)(re)(re)(re)(re)器(qi)內(nei)部流,進(jin)一步給熔(rong)(rong)(rong)(rong)鹽(yan)(yan)增溫(wen),到達熔(rong)(rong)(rong)(rong)鹽(yan)(yan)加(jia)熱(re)(re)(re)(re)(re)器(qi)出口處已(yi)經基本完成加(jia)熱(re)(re)(re)(re)(re)的(de)(de)目(mu)的(de)(de),并與用(yong)戶的(de)(de)用(yong)熱(re)(re)(re)(re)(re)設備形成一個循(xun)環的(de)(de)整體,源源不(bu)斷的(de)(de)給其加(jia)熱(re)(re)(re)(re)(re),從而滿足工(gong)藝的(de)(de)要求。
■熔鹽電加熱器應(ying)用范圍(wei):
熔鹽電加(jia)熱器廣(guang)泛應用(yong)于儲能、儲熱、火電調(diao)峰、化(hua)肥、三聚氫胺、氧(yang)化(hua)鋁等(deng)高溫加(jia)熱生產工藝。
■熔(rong)鹽(yan)電加(jia)熱器控(kong)制系統概述:
1、有常規的電氣保護,如流量和短路保護等。
2、有(you)一(yi)套(tao)獨立于溫(wen)(wen)度(du)控制的超溫(wen)(wen)報(bao)警系統(tong),當電(dian)加熱器(qi)內部溫(wen)(wen)度(du)超過計定值時,它將不可自動復位地關閉(bi)電(dian)加熱器(qi),并輸(shu)出一(yi)個觸(chu)點信號(hao)。
3、有(you)一套獨立的(de)低液位報警,當液位低于要求值時,它(ta)將自動(dong)關閉電加熱器,并(bing)輸出一個信號。
4、提供(gong)數個聯(lian)鎖接口,以便(bian)和其(qi)它設備如(ru)泵、流(liu)量(壓力)開關(guan)等裝置聯(lian)鎖,確保(bao)加(jia)熱器(qi)加(jia)熱時有(you)一定流(liu)量的介質在流(liu)動,保(bao)證系統(tong)的安全。
5、控制可(ke)以(yi)向(xiang)DCS系統(tong)提供加熱系統(tong)處于運行、停止(zhi)(zhi)、超溫(wen)報(bao)警、液(ye)位(wei)信(xin)號(hao)(hao)(hao)(低(di)液(ye)位(wei)報(bao)警)、互鎖狀態、溫(wen)度信(xin)號(hao)(hao)(hao)(4~20mA)等(deng)信(xin)號(hao)(hao)(hao),除溫(wen)度信(xin)號(hao)(hao)(hao)外(wai),它們均為無源(yuan)觸點;可(ke)以(yi)接受DCS發出的啟動、停止(zhi)(zhi)操作命令,要求(qiu)的觸點容量(liang)亦為220V 1A。
6、具有(you)PID溫(wen)度(du)調節功(gong)(gong)能(neng),加(jia)熱(re)系統可(ke)以通過(guo)程序設置介質的(de)(de)升溫(wen)曲線,并能(neng)在流量不足(zu)或停止加(jia)熱(re)后(hou),根據工藝要求控(kong)(kong)(kong)制泵,本控(kong)(kong)(kong)制系統采用多級(ji)控(kong)(kong)(kong)制技術,即把加(jia)熱(re)器(qi)分成幾組(zu),其中(zhong)一(yi)組(zu)也就(jiu)是很大的(de)(de)一(yi)組(zu)可(ke)以無級(ji)調壓,根據出口溫(wen)度(du),經運(yun)算后(hou),控(kong)(kong)(kong)制系統自動控(kong)(kong)(kong)制加(jia)熱(re)器(qi)每組(zu)的(de)(de)通斷和另一(yi)組(zu)加(jia)熱(re)器(qi)的(de)(de)輸出功(gong)(gong)率(lv),達到無級(ji)調功(gong)(gong)。這樣,能(neng)很有(you)效(xiao)地(di)達到提高控(kong)(kong)(kong)溫(wen)精度(du)的(de)(de)目的(de)(de)。