■熔鹽電加熱器:
熔(rong)(rong)(rong)鹽(yan)(yan)電(dian)(dian)加(jia)熱(re)(re)(re)(re)器(qi)是一(yi)種(zhong)電(dian)(dian)加(jia)熱(re)(re)(re)(re)設備,用(yong)(yong)于對流動的(de)(de)液(ye)態、氣態介質(zhi)的(de)(de)升(sheng)溫(wen)、保(bao)溫(wen)、加(jia)熱(re)(re)(re)(re)。熔(rong)(rong)(rong)鹽(yan)(yan)電(dian)(dian)加(jia)熱(re)(re)(re)(re)器(qi)利(li)用(yong)(yong)特殊(shu)管狀電(dian)(dian)熱(re)(re)(re)(re)元(yuan)件結合法(fa)蘭(lan)集束的(de)(de)形(xing)式(shi)與壓(ya)力容(rong)器(qi)組(zu)成一(yi)個供熱(re)(re)(re)(re)整體(ti),利(li)用(yong)(yong)加(jia)熱(re)(re)(re)(re)二元(yuan)熔(rong)(rong)(rong)鹽(yan)(yan)或(huo)三元(yuan)熔(rong)(rong)(rong)鹽(yan)(yan)作為加(jia)熱(re)(re)(re)(re)介質(zhi)。一(yi)般(ban)這種(zhong)加(jia)熱(re)(re)(re)(re)方(fang)式(shi)與熔(rong)(rong)(rong)鹽(yan)(yan)罐組(zu)成一(yi)個整體(ti),當常溫(wen)下的(de)(de)硝(xiao)鹽(yan)(yan)倒(dao)入熔(rong)(rong)(rong)鹽(yan)(yan)罐中以后,利(li)用(yong)(yong)熔(rong)(rong)(rong)鹽(yan)(yan)罐內(nei)的(de)(de)少(shao)量電(dian)(dian)熱(re)(re)(re)(re)元(yuan)件給其(qi)預熱(re)(re)(re)(re),使之變為液(ye)態,然后通過熔(rong)(rong)(rong)鹽(yan)(yan)泵抽取熔(rong)(rong)(rong)鹽(yan)(yan)往加(jia)熱(re)(re)(re)(re)器(qi)內(nei)部流,進一(yi)步給熔(rong)(rong)(rong)鹽(yan)(yan)增溫(wen),到達(da)熔(rong)(rong)(rong)鹽(yan)(yan)加(jia)熱(re)(re)(re)(re)器(qi)出口(kou)處已經基本(ben)完成加(jia)熱(re)(re)(re)(re)的(de)(de)目(mu)的(de)(de),并與用(yong)(yong)戶的(de)(de)用(yong)(yong)熱(re)(re)(re)(re)設備形(xing)成一(yi)個循(xun)環的(de)(de)整體(ti),源源不斷的(de)(de)給其(qi)加(jia)熱(re)(re)(re)(re),從而(er)滿足(zu)工藝的(de)(de)要求。
■熔鹽(yan)電加熱器(qi)應用范圍(wei):
熔鹽電加熱(re)器廣泛(fan)應用于儲(chu)能、儲(chu)熱(re)、火電調峰、化肥、三聚氫胺、氧化鋁等高溫加熱(re)生產工藝。
■熔鹽(yan)電加熱(re)器(qi)控(kong)制系統概述:
1、有常(chang)規(gui)的(de)電氣保護,如流(liu)量和短(duan)路(lu)保護等。
2、有一套獨立于(yu)溫度控制(zhi)的超(chao)溫報(bao)警系統,當(dang)電加(jia)熱器(qi)內部溫度超(chao)過(guo)計定值時(shi),它將不可自動(dong)復位(wei)地(di)關閉電加(jia)熱器(qi),并輸出一個觸(chu)點信號。
3、有一套獨(du)立的(de)低液位報警,當液位低于要求值時(shi),它(ta)將自(zi)動關(guan)閉電加熱器,并輸出一個信號。
4、提供數(shu)個聯(lian)鎖(suo)接口,以便和其它(ta)設備如(ru)泵、流量(liang)(壓(ya)力(li))開關等裝置(zhi)聯(lian)鎖(suo),確(que)保加(jia)熱器加(jia)熱時(shi)有一(yi)定(ding)流量(liang)的介質在流動,保證(zheng)系統的安全。
5、控(kong)制可(ke)以(yi)向DCS系統(tong)提供加熱系統(tong)處于運(yun)行、停(ting)止(zhi)、超溫報警、液位信(xin)(xin)(xin)號(hao)(低液位報警)、互鎖狀態、溫度(du)信(xin)(xin)(xin)號(hao)(4~20mA)等信(xin)(xin)(xin)號(hao),除溫度(du)信(xin)(xin)(xin)號(hao)外,它們均為(wei)無源(yuan)觸點(dian);可(ke)以(yi)接(jie)受(shou)DCS發出的啟動、停(ting)止(zhi)操作命(ming)令,要(yao)求(qiu)的觸點(dian)容量亦為(wei)220V 1A。
6、具有PID溫度調節功能,加熱系統(tong)可以通(tong)過程序(xu)設置介質的(de)升溫曲線(xian),并能在流量不足或停止加熱后,根(gen)據工藝要求控(kong)(kong)(kong)制(zhi)泵,本控(kong)(kong)(kong)制(zhi)系統(tong)采用多級(ji)控(kong)(kong)(kong)制(zhi)技(ji)術,即把加熱器分成幾組,其中一(yi)組也就是很(hen)大的(de)一(yi)組可以無(wu)級(ji)調壓,根(gen)據出(chu)口溫度,經運算后,控(kong)(kong)(kong)制(zhi)系統(tong)自動控(kong)(kong)(kong)制(zhi)加熱器每組的(de)通(tong)斷和另一(yi)組加熱器的(de)輸出(chu)功率,達(da)到(dao)無(wu)級(ji)調功。這(zhe)樣,能很(hen)有效(xiao)地(di)達(da)到(dao)提(ti)高控(kong)(kong)(kong)溫精(jing)度的(de)目的(de)。