一、電滲析裝置是直流還是交流電
電(dian)滲析裝置(zhi)是利用離子交換膜和電(dian)場(chang),使(shi)水中(zhong)電(dian)解質的離子產生選擇性遷(qian)移,從而達到(dao)使(shi)水淡化的裝置(zhi),那(nei)么它用的是直流(liu)電(dian)還是交流(liu)電(dian)呢?
據了解,電(dian)滲析(xi)(xi)設備使用(yong)的(de)是直(zhi)流(liu)電(dian),因為(wei)只有直(zhi)流(liu)電(dian)源(yuan)才能(neng)讓你想滲析(xi)(xi)的(de)離(li)子(zi)定向(xiang)移動,交流(liu)電(dian)的(de)話,電(dian)場方向(xiang)不停的(de)換(huan)(比(bi)如50Hz),帶電(dian)的(de)離(li)子(zi)就(jiu)會在原位附近來回(hui)振蕩,不會定向(xiang)遷移,無法(fa)達到想要的(de)滲析(xi)(xi)效果(guo)。
二、電滲析設備要多大的電流
電滲析設備工作時,要根據需要選(xuan)擇(ze)合適的(de)工作電(dian)(dian)(dian)(dian)流,一般來說,原水含鹽量高,可以(yi)選(xuan)擇(ze)大(da)電(dian)(dian)(dian)(dian)流密(mi)(mi)(mi)(mi)度(du)(du)。在(zai)(zai)一定的(de)除鹽量和水質條件下(xia),使用(yong)大(da)電(dian)(dian)(dian)(dian)流密(mi)(mi)(mi)(mi)度(du)(du)可以(yi)減少電(dian)(dian)(dian)(dian)滲(shen)析設備損耗,降低(di)成本,但增(zeng)加日(ri)常運(yun)行電(dian)(dian)(dian)(dian)費(fei)。在(zai)(zai)使用(yong)小電(dian)(dian)(dian)(dian)流密(mi)(mi)(mi)(mi)度(du)(du)的(de)情況下(xia),降低(di)了(le)日(ri)常運(yun)行電(dian)(dian)(dian)(dian)費(fei),但需要選(xuan)擇(ze)較大(da)的(de)電(dian)(dian)(dian)(dian)滲(shen)析,增(zeng)加成本。電(dian)(dian)(dian)(dian)流密(mi)(mi)(mi)(mi)度(du)(du)較小化成本和每日(ri)運(yun)行電(dian)(dian)(dian)(dian)費(fei)的(de)總(zong)和,稱為經(jing)濟電(dian)(dian)(dian)(dian)流密(mi)(mi)(mi)(mi)度(du)(du),頂點電(dian)(dian)(dian)(dian)流密(mi)(mi)(mi)(mi)度(du)(du)和經(jing)濟電(dian)(dian)(dian)(dian)流密(mi)(mi)(mi)(mi)度(du)(du)不一定相(xiang)等(deng)。如果它們不同,則(ze)應選(xuan)擇(ze)較低(di)的(de)值。
總的來說,工作(zuo)電(dian)流(liu)高(gao),有利于提高(gao)設備效(xiao)率(lv);工作(zuo)電(dian)流(liu)低,有利于防止極化。一般控制工作(zuo)電(dian)流(liu)為極限電(dian)流(liu)的90%。此外,如果選(xuan)定的工作(zuo)電(dian)流(liu)發(fa)生變化,要查清(qing)原因(yin),不可貿(mao)然(ran)采用提高(gao)電(dian)壓的辦法來處理。