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歐姆龍
“近年來,我國水污染事故每年發(fā)生次數(shù)高達1000起左右?!敝袊こ淘耗吃菏坑眠@一數(shù)字表明了當(dāng)前城市供水的現(xiàn)狀。做好長期有效的應(yīng)急供水機制,市政應(yīng)急供水系統(tǒng)成為保障城市應(yīng)急飲用水安全的重要組成部分。
背景介紹
為加大市政應(yīng)急供水系統(tǒng)的建設(shè),國家出臺了多項法案和行業(yè)指導(dǎo)文件。在《水污染防治法修正案》、《城市供水突發(fā)事件應(yīng)急預(yù)案編制指南》等文件中,市政應(yīng)急凈水車都被納入到救援實施體系中,成為確保城市飲用凈水的堅實屏障。
住房和城鄉(xiāng)建設(shè)部為加強國家應(yīng)急救援能力,建立國家供水應(yīng)急救援中心,分別在我國華北、華東、華中、華南、東北、西南、西北、新疆建設(shè)8個救援區(qū)域,大量引入市政應(yīng)急凈水車提高城鎮(zhèn)供水應(yīng)急救援水平。藍普鋒為市政應(yīng)急凈水車提供智能化的PLC全自動化水處理解決方案,伴隨著應(yīng)急救援馳騁在城市的各個事故現(xiàn)場。
就近提供符合標(biāo)準(zhǔn)的飲用水
應(yīng)急凈水車,這不是臺普通的車輛。當(dāng)發(fā)生自然災(zāi)害、重特大事故、環(huán)境公害及人為破壞等重大突發(fā)事故時,原有的飲用水水源遭到破壞,市政應(yīng)急凈水車將提供緊急救援,起到即刻恢復(fù)城市供水的作用。
應(yīng)急凈水車配備的水處理系統(tǒng)需要在水源水質(zhì)得不到保證的情況下,出水標(biāo)準(zhǔn)必須符合國家《生活飲用水衛(wèi)生標(biāo)準(zhǔn)》,需要有較強的原水適應(yīng)性,能夠處理一定級別的高濁度水、苦咸水、微污染水、高藻水、低溫低濁水等,要保證群眾的飲水安全,可供直接飲用。
由此可見,應(yīng)急凈水車屬于移動式、快速響應(yīng)保障車輛,其凈水技術(shù)、工藝、控制系統(tǒng)的穩(wěn)定可靠性決定了能否滿足突發(fā)事件、災(zāi)難現(xiàn)場、災(zāi)后重建等現(xiàn)場的各項功能需求。
PLC控制需求:控制性能與環(huán)境適應(yīng)性能并重
藍普鋒采用高性能PLC控制方案實現(xiàn)應(yīng)急凈水車水處理系統(tǒng)的全自動化運行。自主研發(fā)的RPC2000系列PLC性能出色,運行速度快,高精度實現(xiàn)信號采集,確保水處理系統(tǒng)穩(wěn)定可靠運行,在不同的環(huán)境條件下保證最終水質(zhì)品質(zhì)。
根據(jù)工藝運行要求,通過對預(yù)處理、超濾、納濾或反滲透等過程進行控制,實現(xiàn)凈水生產(chǎn)。RPC2000系列PLC對取水泵、反洗泵、加藥計量泵、加壓泵、鼓風(fēng)機、電磁閥等設(shè)備進行啟/??刂?,對各類水箱完成液位檢測與控制。
RPC2000系列PLC提供了18路模擬量采集和控制輸出,在采集各類儀表0~20mA信號的基礎(chǔ)上,對進出水水質(zhì)參數(shù)、電導(dǎo)率、壓力、溫度等進行監(jiān)視和控制。
PLC硬件IO配置如下:
現(xiàn)場惡劣環(huán)境對RPC2000系列PLC的適應(yīng)性提出了挑戰(zhàn)。應(yīng)急凈水車多用于事故地現(xiàn)場,PLC需在環(huán)境潮濕大、供電不穩(wěn)定等惡劣環(huán)境中長時間工作。市政應(yīng)急凈水車長時間存放于戶外,需確??量汰h(huán)境下、長時間存放能夠應(yīng)急使用,要求PLC產(chǎn)品具有很高的穩(wěn)定可靠性。
由于集約化設(shè)計,設(shè)備高度集成,應(yīng)急凈水車空間緊湊,自配發(fā)電裝置及載有較大的動力裝置,使用過程中震動大、電磁干擾強。盡管有緩震設(shè)計和抗擾措施,仍對PLC防震動、抗干擾性能提出了更高要求。
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