■熔鹽電加熱器:
熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)電加(jia)(jia)熱(re)(re)器(qi)是一(yi)種電加(jia)(jia)熱(re)(re)設備(bei),用(yong)(yong)于對流動的(de)(de)液態、氣態介(jie)質(zhi)的(de)(de)升溫(wen)、保(bao)溫(wen)、加(jia)(jia)熱(re)(re)。熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)電加(jia)(jia)熱(re)(re)器(qi)利(li)用(yong)(yong)特殊管(guan)狀電熱(re)(re)元(yuan)件結合法蘭集束的(de)(de)形式與壓力(li)容器(qi)組成(cheng)一(yi)個供熱(re)(re)整體,利(li)用(yong)(yong)加(jia)(jia)熱(re)(re)二元(yuan)熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)或三元(yuan)熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)作為加(jia)(jia)熱(re)(re)介(jie)質(zhi)。一(yi)般這種加(jia)(jia)熱(re)(re)方(fang)式與熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)罐組成(cheng)一(yi)個整體,當常(chang)溫(wen)下的(de)(de)硝鹽(yan)(yan)(yan)(yan)(yan)(yan)倒入(ru)熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)罐中以后,利(li)用(yong)(yong)熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)罐內(nei)的(de)(de)少量電熱(re)(re)元(yuan)件給(gei)其預熱(re)(re),使(shi)之變(bian)為液態,然后通(tong)過熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)泵(beng)抽取熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)往(wang)加(jia)(jia)熱(re)(re)器(qi)內(nei)部流,進一(yi)步給(gei)熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)增溫(wen),到達熔(rong)(rong)鹽(yan)(yan)(yan)(yan)(yan)(yan)加(jia)(jia)熱(re)(re)器(qi)出(chu)口處已經基(ji)本完成(cheng)加(jia)(jia)熱(re)(re)的(de)(de)目的(de)(de),并(bing)與用(yong)(yong)戶的(de)(de)用(yong)(yong)熱(re)(re)設備(bei)形成(cheng)一(yi)個循環的(de)(de)整體,源(yuan)源(yuan)不斷的(de)(de)給(gei)其加(jia)(jia)熱(re)(re),從而滿(man)足工藝的(de)(de)要求。
■熔鹽電加(jia)熱(re)器應用(yong)范圍:
熔鹽(yan)電(dian)加熱器廣(guang)泛應(ying)用于儲(chu)能、儲(chu)熱、火電(dian)調峰、化肥、三聚氫胺、氧(yang)化鋁等高溫(wen)加熱生產工藝。
■熔鹽(yan)電加熱器(qi)控(kong)制系統概述:
1、有常規的電氣(qi)保護(hu),如流量和短路(lu)保護(hu)等。
2、有一(yi)套獨立于溫(wen)度(du)控制的超溫(wen)報警系統,當電加熱(re)(re)器內部溫(wen)度(du)超過計定值時(shi),它將不可自動(dong)復(fu)位地(di)關閉電加熱(re)(re)器,并輸出一(yi)個(ge)觸點信號(hao)。
3、有一(yi)套(tao)獨立(li)的低液(ye)位報(bao)警,當液(ye)位低于要求值時,它將自動關閉電加熱器,并輸(shu)出一(yi)個(ge)信號。
4、提供數個聯鎖接口,以便和其它(ta)設備如泵(beng)、流量(壓力)開關等裝置聯鎖,確保(bao)加(jia)熱器加(jia)熱時有一(yi)定流量的介質在流動,保(bao)證系統的安(an)全。
5、控制(zhi)可(ke)以(yi)向DCS系統(tong)提供(gong)加熱系統(tong)處于運行、停止、超溫(wen)報警、液位(wei)信(xin)號(低液位(wei)報警)、互(hu)鎖狀態、溫(wen)度信(xin)號(4~20mA)等(deng)信(xin)號,除(chu)溫(wen)度信(xin)號外,它們均為無源觸(chu)(chu)點;可(ke)以(yi)接受DCS發出的(de)啟動、停止操作命(ming)令,要求(qiu)的(de)觸(chu)(chu)點容量亦為220V 1A。
6、具有PID溫(wen)(wen)度(du)調節(jie)功(gong)(gong)能,加熱(re)(re)系統可以通過程序設置介質的升溫(wen)(wen)曲(qu)線,并能在流量不(bu)足或停止加熱(re)(re)后,根據(ju)(ju)工(gong)藝要求控(kong)(kong)制泵(beng),本控(kong)(kong)制系統采(cai)用(yong)多級(ji)(ji)(ji)控(kong)(kong)制技術,即(ji)把(ba)加熱(re)(re)器(qi)分成幾組,其中(zhong)一組也(ye)就是很大的一組可以無(wu)級(ji)(ji)(ji)調壓(ya),根據(ju)(ju)出口溫(wen)(wen)度(du),經(jing)運(yun)算后,控(kong)(kong)制系統自動控(kong)(kong)制加熱(re)(re)器(qi)每組的通斷和(he)另一組加熱(re)(re)器(qi)的輸出功(gong)(gong)率,達到無(wu)級(ji)(ji)(ji)調功(gong)(gong)。這樣,能很有效地達到提高(gao)控(kong)(kong)溫(wen)(wen)精度(du)的目(mu)的。