SIEMENS RMS-TSIG-TZ
SIEMENS RMS-TSIG-TZ
SIEMENS RMS-TSIG-TZ
SIEMENS RMS-TSIG-TZ變頻器分散控制系統(tǒng)(DCS)對白銀爐進(jìn)行監(jiān)測與控制,保證了白銀爐這幾年的穩(wěn)定生產(chǎn)。該系統(tǒng)一個(gè)主要的任務(wù)是控制好白銀爐內(nèi)的熔體溫度。熔體溫度過高,會降低爐壽命,嚴(yán)重時(shí)將燒壞爐墻水套,或燒穿爐壁,引起跑銅等事故;熔體溫度過低,熔體流動(dòng)性差,冰銅與渣難分離,使渣含銅提高。因此,控制好熔體溫度,關(guān)系到白銀爐生產(chǎn)能力、合理的渣型、燃料的消耗及爐體壽命等重大經(jīng)濟(jì)技術(shù)指標(biāo)。
由于白銀爐料成分復(fù)雜且多變,為了充分利用已有風(fēng)機(jī)及制氧設(shè)備的能力,吹煉風(fēng)及氧流量一般不變,而是通過控制白銀爐加料量來控制爐內(nèi)熔體溫度。白銀爐加料系統(tǒng)簡介白銀爐之加料系統(tǒng)由爐頂料倉、圓盤給料機(jī)、爐頂加料皮帶等組成.白銀爐加料系統(tǒng)簡圖爐料自爐頂料倉,經(jīng)圓盤給料機(jī)、爐頂加料皮帶至白銀爐加料口。
由于白銀爐內(nèi)反應(yīng)激烈,且有噴濺,加料口易堵塞。堵塞時(shí),需停止加料(停圓盤),處理加料口。料中夾帶編織袋等雜物,偶爾堵塞圓盤機(jī)出料口,也必須停圓盤清理。圓盤的開、停均在現(xiàn)場操作。加料皮帶上設(shè)有核子秤(采用BERTHOLD公司核子秤),圓盤給料機(jī)由變頻調(diào)速器控制速度,均受DCS系統(tǒng)監(jiān)控。若不考慮其他因素,本調(diào)節(jié)系統(tǒng)為一單回路調(diào)節(jié)系統(tǒng)。
變頻器用于低水頭運(yùn)行的新增機(jī)組設(shè)備,當(dāng)水輪機(jī)長期在低水頭下運(yùn)行時(shí)盡管這種情況極少,該設(shè)備被認(rèn)為較經(jīng)濟(jì)。以巴什科爾托斯坦在建的尤馬古津斯克水電站為例,對用于工作水頭變化范圍較大條件下的各種水輪發(fā)電機(jī)進(jìn)行技術(shù)經(jīng)濟(jì)比較。該電站將安裝3臺水輪發(fā)電機(jī)組,單機(jī)容量為15MW,水輪機(jī)工作水頭的變化范圍為53~17m。設(shè)備價(jià)格和電費(fèi)以美元計(jì)算,輻向軸流式和轉(zhuǎn)槳式水輪機(jī)的工作輪直徑相同,均為2.3m,與其用于50m左右水頭的單位特性相一致。
SIEMENS RMS-TSIG-TZ
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