■熔鹽電加熱器:
熔(rong)(rong)鹽(yan)(yan)電(dian)加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器是一(yi)種(zhong)(zhong)電(dian)加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)設(she)備,用(yong)(yong)(yong)(yong)于對流動的液(ye)態、氣態介質的升(sheng)溫、保溫、加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)。熔(rong)(rong)鹽(yan)(yan)電(dian)加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器利用(yong)(yong)(yong)(yong)特(te)殊管狀(zhuang)電(dian)熱(re)(re)(re)(re)元(yuan)件結合法蘭集束(shu)的形式與(yu)(yu)壓力容器組成一(yi)個供(gong)熱(re)(re)(re)(re)整(zheng)體,利用(yong)(yong)(yong)(yong)加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)二(er)元(yuan)熔(rong)(rong)鹽(yan)(yan)或三元(yuan)熔(rong)(rong)鹽(yan)(yan)作為加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)介質。一(yi)般(ban)這種(zhong)(zhong)加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)方式與(yu)(yu)熔(rong)(rong)鹽(yan)(yan)罐(guan)組成一(yi)個整(zheng)體,當常溫下(xia)的硝鹽(yan)(yan)倒入(ru)熔(rong)(rong)鹽(yan)(yan)罐(guan)中以后,利用(yong)(yong)(yong)(yong)熔(rong)(rong)鹽(yan)(yan)罐(guan)內的少量電(dian)熱(re)(re)(re)(re)元(yuan)件給(gei)其預熱(re)(re)(re)(re),使之變為液(ye)態,然后通過熔(rong)(rong)鹽(yan)(yan)泵抽取(qu)熔(rong)(rong)鹽(yan)(yan)往加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器內部(bu)流,進一(yi)步給(gei)熔(rong)(rong)鹽(yan)(yan)增溫,到達熔(rong)(rong)鹽(yan)(yan)加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器出(chu)口處已(yi)經基本(ben)完(wan)成加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)的目的,并與(yu)(yu)用(yong)(yong)(yong)(yong)戶的用(yong)(yong)(yong)(yong)熱(re)(re)(re)(re)設(she)備形成一(yi)個循(xun)環的整(zheng)體,源源不斷(duan)的給(gei)其加(jia)(jia)(jia)(jia)熱(re)(re)(re)(re),從而滿足(zu)工(gong)藝的要求(qiu)。
■熔鹽電(dian)加(jia)熱器應(ying)用(yong)范圍:
熔鹽(yan)電加熱器廣(guang)泛應(ying)用于儲能、儲熱、火(huo)電調峰、化(hua)肥、三聚氫胺(an)、氧化(hua)鋁等高溫(wen)加熱生產工(gong)藝。
■熔(rong)鹽電(dian)加熱器控制系統概述(shu):
1、有常(chang)規的電氣保(bao)護,如流(liu)量和短路保(bao)護等。
2、有一套獨(du)立(li)于溫度(du)控制的超(chao)溫報警系統,當電加(jia)熱器(qi)內部溫度(du)超(chao)過計定(ding)值時(shi),它將(jiang)不可自動(dong)復(fu)位地關閉電加(jia)熱器(qi),并輸出(chu)一個觸點信號。
3、有一(yi)套獨(du)立的(de)低(di)液位報(bao)警,當(dang)液位低(di)于要求(qiu)值時,它將(jiang)自動關閉電加熱器,并輸出一(yi)個信號。
4、提供數個聯(lian)(lian)鎖接口,以便和其它設備(bei)如泵、流量(壓力)開關(guan)等裝置聯(lian)(lian)鎖,確(que)保加(jia)(jia)熱(re)器加(jia)(jia)熱(re)時有一定流量的介質(zhi)在流動,保證系統的安全。
5、控制(zhi)可(ke)以向(xiang)DCS系統提供加熱系統處于運行、停止、超溫報警(jing)、液(ye)位信號(低(di)液(ye)位報警(jing))、互鎖狀態(tai)、溫度(du)信號(4~20mA)等信號,除溫度(du)信號外,它(ta)們均為(wei)無(wu)源觸(chu)點(dian);可(ke)以接受DCS發出的啟動、停止操作命令,要求的觸(chu)點(dian)容量(liang)亦為(wei)220V 1A。
6、具(ju)有(you)PID溫度(du)調節功(gong)能(neng),加熱(re)系統(tong)(tong)可(ke)以通(tong)過程序(xu)設(she)置介質的(de)升溫曲線(xian),并能(neng)在流量不足或停止(zhi)加熱(re)后(hou),根(gen)據工藝要求控(kong)(kong)制(zhi)泵,本控(kong)(kong)制(zhi)系統(tong)(tong)采用多級(ji)控(kong)(kong)制(zhi)技術,即把(ba)加熱(re)器(qi)分(fen)成幾組,其(qi)中(zhong)一(yi)組也就是很大的(de)一(yi)組可(ke)以無(wu)級(ji)調壓,根(gen)據出口溫度(du),經運算后(hou),控(kong)(kong)制(zhi)系統(tong)(tong)自動(dong)控(kong)(kong)制(zhi)加熱(re)器(qi)每組的(de)通(tong)斷(duan)和另一(yi)組加熱(re)器(qi)的(de)輸(shu)出功(gong)率,達到(dao)無(wu)級(ji)調功(gong)。這(zhe)樣(yang),能(neng)很有(you)效地達到(dao)提高控(kong)(kong)溫精度(du)的(de)目的(de)。