1756-L72/B
1756-L72/B
1756-L72/B
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根據(jù)污水廠(chǎng)的處理要求,需要150M3/H的處理量,經(jīng)計(jì)算需要30KW的循環(huán)泵供水。因此選用了ABB的變頻器。整個(gè)污水處理廠(chǎng)的電氣設(shè)備要求能夠聯(lián)網(wǎng),可控可查看運(yùn)行狀態(tài)。考慮到成本問(wèn)題,選用了西門(mén)子200SMART系列的PLC,這個(gè)與其他設(shè)備聯(lián)網(wǎng)方便,可以采用PROFIBUS連接至主系統(tǒng)。
具體控制要求如下:系統(tǒng)具備一鍵啟動(dòng)功能,點(diǎn)擊一鍵啟動(dòng),F(xiàn)1進(jìn)水閥、F4濃水閥、F6產(chǎn)水閥開(kāi)啟,30s(可設(shè)置)后供料泵自動(dòng)啟動(dòng),60s(可設(shè)置)循環(huán)泵開(kāi)啟,循環(huán)泵頻率升至42Hz(可設(shè)置),正常運(yùn)行。
系統(tǒng)具備一鍵停機(jī)功能,點(diǎn)擊一鍵停機(jī),循環(huán)泵頻率降至25Hz(可設(shè)置)后循環(huán)泵停,30s(可設(shè)置)后所有泵、閥門(mén)關(guān)。
系統(tǒng)具備一鍵沖洗功能(清洗水箱有足夠液位情況下):設(shè)備停機(jī)狀態(tài)下,點(diǎn)擊一鍵沖洗,F(xiàn)2清洗進(jìn)水閥、F4濃水閥開(kāi)啟,30s(可設(shè)置)清洗泵開(kāi)啟,自動(dòng)沖洗開(kāi)始,30s(可設(shè)置)后,所有閥和泵同時(shí)關(guān)閉沖洗結(jié)束。
系統(tǒng)具備一鍵清洗功能(清洗水箱充滿(mǎn)一定液位自來(lái)水情況下):設(shè)備停機(jī)狀態(tài)下,點(diǎn)擊一鍵沖洗,F(xiàn)2清洗進(jìn)水閥、F5、F7清洗回流閥開(kāi)啟,30s(可設(shè)置)清洗泵開(kāi)啟,自動(dòng)清洗開(kāi)始,30min(可設(shè)置)后,所有閥和泵同時(shí)關(guān)閉清洗結(jié)束。
其他功能有,高液位停機(jī):產(chǎn)水池液位超過(guò)3m(可設(shè)置)時(shí),報(bào)警并自動(dòng)一鍵停機(jī)。
手動(dòng)模式:切換手動(dòng)模式,自動(dòng)模式開(kāi)啟不了,屏幕內(nèi)泵、閥門(mén)只能手動(dòng)操作。
緊急停機(jī):按下緊急停機(jī),所有閥門(mén)、泵全部關(guān)閉。
F8自來(lái)水電磁閥單獨(dú)開(kāi)與停,但清洗水箱液位只要超過(guò)1.2m(可設(shè)置)時(shí),F(xiàn)8自來(lái)水電磁閥自動(dòng)關(guān)閉。
二、電氣硬件設(shè)計(jì)
根據(jù)計(jì)劃,采用西門(mén)子200SMART系列的PLC。
系統(tǒng)由供水泵,循環(huán)泵,清洗泵三臺(tái)電機(jī),7個(gè)電動(dòng)閥,1個(gè)電磁閥組成。
經(jīng)統(tǒng)計(jì):
數(shù)字量輸入點(diǎn)有19個(gè),分別是7個(gè)電動(dòng)閥的開(kāi)到位和關(guān)到位信號(hào)反饋,(共14個(gè)),3個(gè)水泵的故障反饋信號(hào),2個(gè)按鈕信號(hào)(報(bào)警確認(rèn),急停)。
數(shù)字量輸出點(diǎn)有13個(gè),分別是7個(gè)電動(dòng)閥,1個(gè)電磁閥,3個(gè)水泵,1個(gè)蜂鳴器,1個(gè)報(bào)。
模擬量輸入點(diǎn)有7個(gè),分別是循環(huán)流量,濃水流量,進(jìn)膜壓力,出膜壓力,清洗水箱液位,納濾水箱液位,變頻器頻率反饋。
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福建光沃自動(dòng)化設(shè)備有限公司
聯(lián)系人 :歐工(銷(xiāo)售經(jīng)理)
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