■熔鹽電加熱器:
熔(rong)(rong)(rong)(rong)鹽(yan)電加(jia)(jia)熱(re)(re)(re)(re)器(qi)是一(yi)種(zhong)電加(jia)(jia)熱(re)(re)(re)(re)設(she)備,用(yong)于對流(liu)動的(de)(de)(de)液態、氣(qi)態介質的(de)(de)(de)升溫、保溫、加(jia)(jia)熱(re)(re)(re)(re)。熔(rong)(rong)(rong)(rong)鹽(yan)電加(jia)(jia)熱(re)(re)(re)(re)器(qi)利(li)用(yong)特(te)殊管(guan)狀電熱(re)(re)(re)(re)元(yuan)(yuan)件結合法蘭集束的(de)(de)(de)形式(shi)與(yu)壓(ya)力(li)容器(qi)組成(cheng)一(yi)個(ge)供熱(re)(re)(re)(re)整體,利(li)用(yong)加(jia)(jia)熱(re)(re)(re)(re)二元(yuan)(yuan)熔(rong)(rong)(rong)(rong)鹽(yan)或(huo)三元(yuan)(yuan)熔(rong)(rong)(rong)(rong)鹽(yan)作為(wei)加(jia)(jia)熱(re)(re)(re)(re)介質。一(yi)般這種(zhong)加(jia)(jia)熱(re)(re)(re)(re)方式(shi)與(yu)熔(rong)(rong)(rong)(rong)鹽(yan)罐(guan)組成(cheng)一(yi)個(ge)整體,當(dang)常溫下的(de)(de)(de)硝鹽(yan)倒入熔(rong)(rong)(rong)(rong)鹽(yan)罐(guan)中以后,利(li)用(yong)熔(rong)(rong)(rong)(rong)鹽(yan)罐(guan)內的(de)(de)(de)少(shao)量(liang)電熱(re)(re)(re)(re)元(yuan)(yuan)件給(gei)其(qi)預熱(re)(re)(re)(re),使之變為(wei)液態,然后通過熔(rong)(rong)(rong)(rong)鹽(yan)泵抽取熔(rong)(rong)(rong)(rong)鹽(yan)往加(jia)(jia)熱(re)(re)(re)(re)器(qi)內部(bu)流(liu),進一(yi)步給(gei)熔(rong)(rong)(rong)(rong)鹽(yan)增溫,到達熔(rong)(rong)(rong)(rong)鹽(yan)加(jia)(jia)熱(re)(re)(re)(re)器(qi)出口處已(yi)經基本完成(cheng)加(jia)(jia)熱(re)(re)(re)(re)的(de)(de)(de)目的(de)(de)(de),并與(yu)用(yong)戶的(de)(de)(de)用(yong)熱(re)(re)(re)(re)設(she)備形成(cheng)一(yi)個(ge)循環的(de)(de)(de)整體,源源不斷的(de)(de)(de)給(gei)其(qi)加(jia)(jia)熱(re)(re)(re)(re),從而(er)滿足工藝的(de)(de)(de)要求。
■熔鹽電加熱器應(ying)用范圍:
熔鹽電加(jia)熱器(qi)廣泛應用于儲(chu)(chu)能、儲(chu)(chu)熱、火電調峰、化肥、三聚氫(qing)胺、氧(yang)化鋁(lv)等高溫加(jia)熱生產(chan)工藝。
■熔鹽(yan)電加熱(re)器控制(zhi)系(xi)統概述:
1、有常規的電(dian)氣保(bao)護(hu),如流量和短路保(bao)護(hu)等。
2、有一套(tao)獨立于溫(wen)度(du)(du)控(kong)制的超溫(wen)報警系統(tong),當電加熱器內部溫(wen)度(du)(du)超過計定值時,它將不可自動(dong)復(fu)位地關閉電加熱器,并(bing)輸出一個觸點信號(hao)。
3、有(you)一(yi)套獨(du)立(li)的低液位報警,當液位低于(yu)要求值時(shi),它將自動關閉電加熱器(qi),并輸出一(yi)個(ge)信號。
4、提供數(shu)個聯(lian)鎖接(jie)口,以便和(he)其它設備(bei)如泵、流量(壓力)開關等裝(zhuang)置聯(lian)鎖,確(que)保加(jia)熱(re)器加(jia)熱(re)時有(you)一定流量的介質在流動,保證系統(tong)的安全。
5、控制(zhi)可以向DCS系(xi)統提供加(jia)熱系(xi)統處(chu)于運行、停止、超(chao)溫報警、液位信號(hao)(低液位報警)、互鎖狀態、溫度信號(hao)(4~20mA)等(deng)信號(hao),除溫度信號(hao)外,它們均為(wei)(wei)無源觸點;可以接受DCS發出的啟動、停止操作命(ming)令,要求的觸點容(rong)量亦為(wei)(wei)220V 1A。
6、具(ju)有(you)PID溫(wen)度調節(jie)功(gong)能(neng),加(jia)熱(re)系統(tong)可以通過(guo)程序設置(zhi)介質的(de)升溫(wen)曲線,并能(neng)在(zai)流量不足或停止加(jia)熱(re)后,根(gen)據工(gong)藝(yi)要求控(kong)(kong)(kong)制(zhi)(zhi)(zhi)泵,本控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系統(tong)采(cai)用多級控(kong)(kong)(kong)制(zhi)(zhi)(zhi)技術,即把加(jia)熱(re)器(qi)分成幾組(zu)(zu),其(qi)中(zhong)一(yi)(yi)(yi)組(zu)(zu)也就是(shi)很大(da)的(de)一(yi)(yi)(yi)組(zu)(zu)可以無(wu)級調壓,根(gen)據出(chu)口溫(wen)度,經運算后,控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系統(tong)自(zi)動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)加(jia)熱(re)器(qi)每組(zu)(zu)的(de)通斷和另一(yi)(yi)(yi)組(zu)(zu)加(jia)熱(re)器(qi)的(de)輸出(chu)功(gong)率,達(da)到(dao)無(wu)級調功(gong)。這樣,能(neng)很有(you)效地達(da)到(dao)提(ti)高控(kong)(kong)(kong)溫(wen)精(jing)度的(de)目(mu)的(de)。