■熔鹽電加熱器:
熔(rong)(rong)(rong)鹽(yan)(yan)電(dian)加(jia)(jia)熱(re)(re)(re)器(qi)(qi)(qi)是一(yi)種(zhong)電(dian)加(jia)(jia)熱(re)(re)(re)設備(bei),用(yong)(yong)于對流(liu)(liu)動的(de)液態(tai)、氣態(tai)介質(zhi)的(de)升溫、保溫、加(jia)(jia)熱(re)(re)(re)。熔(rong)(rong)(rong)鹽(yan)(yan)電(dian)加(jia)(jia)熱(re)(re)(re)器(qi)(qi)(qi)利(li)用(yong)(yong)特殊(shu)管(guan)狀電(dian)熱(re)(re)(re)元(yuan)件結合法蘭集束(shu)的(de)形式(shi)與壓(ya)力容(rong)器(qi)(qi)(qi)組成(cheng)一(yi)個供熱(re)(re)(re)整體,利(li)用(yong)(yong)加(jia)(jia)熱(re)(re)(re)二元(yuan)熔(rong)(rong)(rong)鹽(yan)(yan)或三(san)元(yuan)熔(rong)(rong)(rong)鹽(yan)(yan)作(zuo)為加(jia)(jia)熱(re)(re)(re)介質(zhi)。一(yi)般這(zhe)種(zhong)加(jia)(jia)熱(re)(re)(re)方式(shi)與熔(rong)(rong)(rong)鹽(yan)(yan)罐(guan)(guan)組成(cheng)一(yi)個整體,當常溫下的(de)硝鹽(yan)(yan)倒入熔(rong)(rong)(rong)鹽(yan)(yan)罐(guan)(guan)中以(yi)后,利(li)用(yong)(yong)熔(rong)(rong)(rong)鹽(yan)(yan)罐(guan)(guan)內的(de)少量(liang)電(dian)熱(re)(re)(re)元(yuan)件給其預熱(re)(re)(re),使之變為液態(tai),然后通過熔(rong)(rong)(rong)鹽(yan)(yan)泵抽取熔(rong)(rong)(rong)鹽(yan)(yan)往加(jia)(jia)熱(re)(re)(re)器(qi)(qi)(qi)內部流(liu)(liu),進一(yi)步給熔(rong)(rong)(rong)鹽(yan)(yan)增溫,到達熔(rong)(rong)(rong)鹽(yan)(yan)加(jia)(jia)熱(re)(re)(re)器(qi)(qi)(qi)出口處已經基本完成(cheng)加(jia)(jia)熱(re)(re)(re)的(de)目的(de),并(bing)與用(yong)(yong)戶的(de)用(yong)(yong)熱(re)(re)(re)設備(bei)形成(cheng)一(yi)個循環(huan)的(de)整體,源源不(bu)斷的(de)給其加(jia)(jia)熱(re)(re)(re),從(cong)而滿足工藝的(de)要求。
■熔鹽(yan)電加熱器應用范圍(wei):
熔鹽電加熱(re)器廣泛應用(yong)于儲能、儲熱(re)、火(huo)電調(diao)峰、化(hua)肥、三聚氫胺、氧化(hua)鋁等高溫加熱(re)生產工(gong)藝。
■熔鹽電(dian)加熱(re)器控制系統概述:
1、有常規的電(dian)氣(qi)保(bao)(bao)護,如流量和(he)短路保(bao)(bao)護等。
2、有一(yi)(yi)套獨立于溫(wen)度控制的超溫(wen)報警(jing)系統(tong),當電(dian)(dian)加熱器內部溫(wen)度超過計定值時,它將(jiang)不可(ke)自動復(fu)位地關閉電(dian)(dian)加熱器,并輸出一(yi)(yi)個觸(chu)點信號(hao)。
3、有一套(tao)獨立的低(di)液位報警(jing),當(dang)液位低(di)于要求值時(shi),它將自(zi)動關閉電加熱(re)器,并輸出(chu)一個信號。
4、提供數(shu)個(ge)聯鎖接口,以(yi)便和其(qi)它設備如泵、流(liu)(liu)量(liang)(壓力)開關等裝置(zhi)聯鎖,確(que)保加(jia)熱器加(jia)熱時有一定(ding)流(liu)(liu)量(liang)的介質在流(liu)(liu)動,保證系統的安全。
5、控制(zhi)可(ke)以向(xiang)DCS系統(tong)(tong)提供(gong)加熱系統(tong)(tong)處于(yu)運行、停(ting)止(zhi)(zhi)、超溫報(bao)警、液位(wei)信(xin)號(hao)(hao)(低液位(wei)報(bao)警)、互鎖狀(zhuang)態、溫度信(xin)號(hao)(hao)(4~20mA)等信(xin)號(hao)(hao),除溫度信(xin)號(hao)(hao)外,它(ta)們均為無源觸(chu)點(dian);可(ke)以接受(shou)DCS發出的(de)(de)啟動、停(ting)止(zhi)(zhi)操(cao)作(zuo)命(ming)令,要求的(de)(de)觸(chu)點(dian)容量亦為220V 1A。
6、具有(you)PID溫(wen)度調(diao)節(jie)功能(neng),加(jia)熱(re)(re)系(xi)統(tong)可(ke)以通(tong)過程序(xu)設置介質(zhi)的(de)升溫(wen)曲(qu)線,并能(neng)在(zai)流(liu)量不(bu)足或停止(zhi)加(jia)熱(re)(re)后,根據工藝要(yao)求控(kong)制泵,本控(kong)制系(xi)統(tong)采用多級(ji)控(kong)制技術,即把加(jia)熱(re)(re)器(qi)分成幾組(zu),其(qi)中一(yi)組(zu)也就(jiu)是很(hen)大(da)的(de)一(yi)組(zu)可(ke)以無級(ji)調(diao)壓,根據出口溫(wen)度,經運(yun)算(suan)后,控(kong)制系(xi)統(tong)自(zi)動控(kong)制加(jia)熱(re)(re)器(qi)每(mei)組(zu)的(de)通(tong)斷(duan)和另一(yi)組(zu)加(jia)熱(re)(re)器(qi)的(de)輸(shu)出功率,達(da)到(dao)無級(ji)調(diao)功。這(zhe)樣,能(neng)很(hen)有(you)效(xiao)地達(da)到(dao)提高控(kong)溫(wen)精度的(de)目(mu)的(de)。