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V600-H125M
歐姆龍
“近年來(lái)，我國(guó)水污染事故每年發(fā)生次數(shù)高達(dá)1000起左右。”中國(guó)工程院某院士用這一數(shù)字表明了當(dāng)前城市供水的現(xiàn)狀。做好長(zhǎng)期有效的應(yīng)急供水機(jī)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(guó)家出臺(tái)了多項(xiàng)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(shí)施體系中，成為確保城市飲用凈水的堅(jiān)實(shí)屏障。
住房和城鄉(xiāng)建設(shè)部為加強(qiáng)國(guó)家應(yīng)急救援能力，建立國(guó)家供水應(yīng)急救援中心，分別在我國(guó)華北、華東、華中、華南、東北、西南、西北、新疆建設(shè)8個(gè)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(lán)普鋒為市政應(yīng)急凈水車提供智能化的PLC全自動(dòng)化水處理解決方案，伴隨著應(yīng)急救援馳騁在城市的各個(gè)事故現(xiàn)場(chǎng)。
就近提供符合標(biāo)準(zhǔn)的飲用水
應(yīng)急凈水車，這不是臺(tái)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(shí)，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(guó)家《生活飲用水衛(wèi)生標(biāo)準(zhǔn)》，需要有較強(qiáng)的原水適應(yīng)性，能夠處理一定級(jí)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(jiàn)，應(yīng)急凈水車屬于移動(dòng)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(chǎng)、災(zāi)后重建等現(xiàn)場(chǎng)的各項(xiàng)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(lán)普鋒采用高性能PLC控制方案實(shí)現(xiàn)應(yīng)急凈水車水處理系統(tǒng)的全自動(dòng)化運(yùn)行。自主研發(fā)的RPC2000系列PLC性能出色，運(yùn)行速度快，高精度實(shí)現(xiàn)信號(hào)采集，確保水處理系統(tǒng)穩(wěn)定可靠運(yùn)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(yùn)行要求，通過(guò)對(duì)預(yù)處理、超濾、納濾或反滲透等過(guò)程進(jìn)行控制，實(shí)現(xiàn)凈水生產(chǎn)。RPC2000系列PLC對(duì)取水泵、反洗泵、加藥計(jì)量泵、加壓泵、鼓風(fēng)機(jī)、電磁閥等設(shè)備進(jìn)行啟/?？刂?，對(duì)各類水箱完成液位檢測(cè)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(hào)的基礎(chǔ)上，對(duì)進(jìn)出水水質(zhì)參數(shù)、電導(dǎo)率、壓力、溫度等進(jìn)行監(jiān)視和控制。
PLC硬件IO配置如下：
現(xiàn)場(chǎng)惡劣環(huán)境對(duì)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(chǎng)，PLC需在環(huán)境潮濕大、供電不穩(wěn)定等惡劣環(huán)境中長(zhǎng)時(shí)間工作。市政應(yīng)急凈水車長(zhǎng)時(shí)間存放于戶外，需確?？量汰h(huán)境下、長(zhǎng)時(shí)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(jì)，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(dòng)力裝置，使用過(guò)程中震動(dòng)大、電磁干擾強(qiáng)。盡管有緩震設(shè)計(jì)和抗擾措施，仍對(duì)PLC防震動(dòng)、抗干擾性能提出了更高要求。
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