熔鹽光熱電廠電伴熱系統的重要性:
高溫(wen)(wen)電(dian)伴熱是解決高暴露溫(wen)(wen)度(du)和高工(gong)(gong)作(zuo)(zuo)溫(wen)(wen)度(du)要(yao)求(qiu)的保(bao)溫(wen)(wen)措施,不僅(jin)能在高溫(wen)(wen)環境下(xia)正常工(gong)(gong)作(zuo)(zuo),還能高溫(wen)(wen)加熱受熱物質。 熔(rong)鹽(yan)(yan)光熱電(dian)廠多(duo)為塔(ta)型,熔(rong)鹽(yan)(yan)工(gong)(gong)作(zuo)(zuo)溫(wen)(wen)度(du)上限(xian)為560。當(dang)溫(wen)(wen)度(du)達到220攝氏度(du)或以下(xia)時(shi),它就會凝固,在這種情況下(xia),絕緣(yuan)是高溫(wen)(wen)的。
光在熔(rong)(rong)鹽管(guan)道中(zhong)采用(yong)(yong)絕熱保(bao)溫(wen)材(cai)料,解決了熱量不散(san)和熱量少散(san)熱,不能使熔(rong)(rong)鹽保(bao)持在正常(chang)的(de)工(gong)作(zuo)溫(wen)度范圍(wei)內。 因(yin)此,熔(rong)(rong)鹽光熱電(dian)廠(chang)的(de)熔(rong)(rong)鹽輸送管(guan)僅靠隔(ge)熱保(bao)溫(wen)措施是不夠的(de)。 必須提高熱補償以防止熔(rong)(rong)鹽凝固采用(yong)(yong)高溫(wen)電(dian)熱既能提高熱效率(lv),又(you)能確保(bao)光電(dian)廠(chang)的(de)安全(quan)運行(xing)。 與電(dian)加(jia)熱相比(bi),節能環保(bao),節約投入成本。
熔鹽光熱(re)(re)(re)(re)電廠輸送管道通(tong)常比較短,是為了提高電熱(re)(re)(re)(re)的(de)熱(re)(re)(re)(re)效率。 因此,保(bao)護的(de)重點在于集熱(re)(re)(re)(re)塔和熔鹽吸(xi)熱(re)(re)(re)(re)器、吸(xi)熱(re)(re)(re)(re)器閥、吸(xi)熱(re)(re)(re)(re)器室(shi)等(deng)容(rong)易(yi)產(chan)生大的(de)熱(re)(re)(re)(re)損失的(de)場所(suo)(如上述圖所(suo)示)。也就(jiu)是說,高溫(wen)(wen)(wen)電熱(re)(re)(re)(re)的(de)工作溫(wen)(wen)(wen)度(du)(du)可以達到數百度(du)(du),配合使用溫(wen)(wen)(wen)度(du)(du)調節裝置可以正確(que)控制溫(wen)(wen)(wen)度(du)(du)的(de)絕熱(re)(re)(re)(re)保(bao)溫(wen)(wen)(wen)材料使用,兼顧防(fang)止結露保(bao)溫(wen)(wen)(wen)、安全防(fang)護。
熔鹽光熱電廠電伴熱系統注意要素:
熔鹽(yan)介質的(de)溫度從260℃到(dao)550℃不等;
塔系統需要考慮垂直管(guan)道垂直管(guan)道熱的特殊分布;
槽系統需要大量的熱(re)帶電場;
兩種系統(tong)使用冗余電路設計(ji)來確保可(ke)靠性。
根據(ju)上述電(dian)熱系(xi)(xi)統(tong)(tong)(tong)(tong)的(de)(de)(de)設(she)計要(yao)求(qiu)和(he)熔鹽蓄(xu)熱傳熱系(xi)(xi)統(tong)(tong)(tong)(tong)的(de)(de)(de)高溫(wen)(wen)特(te)性(xing),要(yao)求(qiu)電(dian)熱系(xi)(xi)統(tong)(tong)(tong)(tong)在設(she)計和(he)施工中應考慮(lv)到熱電(dian)系(xi)(xi)統(tong)(tong)(tong)(tong)的(de)(de)(de)穩定性(xing)和(he)可(ke)靠(kao)的(de)(de)(de)壽命(ming)周期。因此,采用MI加熱電(dian)纜(lan)高溫(wen)(wen)加熱系(xi)(xi)統(tong)(tong)(tong)(tong),該系(xi)(xi)統(tong)(tong)(tong)(tong)的(de)(de)(de)設(she)計溫(wen)(wen)度可(ke)達(da)800℃,正常(chang)使用壽命(ming)超過10年,完全(quan)滿足熱力發(fa)電(dian)中熔鹽加熱的(de)(de)(de)要(yao)求(qiu)。
采用可控(kong)檢測系統,實(shi)時監測電(dian)熱運行情(qing)況,實(shi)現電(dian)熱精度控(kong)制,確保(bao)生產連續性的熔巖管道對電(dian)伴熱帶的安(an)(an)裝要求,沃(wo)安(an)(an)電(dian)伴熱系統的優良彎曲撓(nao)性特性正好滿足了安(an)(an)裝要求。