環保化工儲罐
環保(bao)化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan)用于儲(chu)(chu)(chu)存從酸、堿、酒精(jing)、氣體和(he)液體中(zhong)提取的(de)(de)(de)化(hua)(hua)(hua)(hua)(hua)學物質(zhi)。根據材料不(bu)(bu)同,聚乙烯化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan),聚丙烯化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan),玻(bo)璃鋼化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan),陶瓷化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan),橡膠(jiao)化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan),不(bu)(bu)銹鋼化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan)等。鋼化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan)是(shi)石油(you)、化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)、糧油(you)、食品、消防、交通、冶金(jin)等行業必不(bu)(bu)可少的(de)(de)(de)重要(yao)基礎設施。化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan)防腐一直是(shi)各大(da)工(gong)(gong)(gong)(gong)業企業非常重視的(de)(de)(de)設備管理(li)問題。因(yin)此,以(yi)化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan)為例,簡單分析(xi)化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)(gong)(gong)儲(chu)(chu)(chu)罐(guan)腐蝕的(de)(de)(de)原(yuan)因(yin)以(yi)及對(dui)出線管道的(de)(de)(de)防腐保(bao)護方法!
化工儲罐腐蝕的原因是(shi)什么?
環(huan)保化(hua)工(gong)儲罐(guan)在酸(suan)性(xing)溶(rong)液(ye)環(huan)境中,對介質(zhi)(zhi)腐蝕性(xing)的(de)(de)主要(yao)影(ying)響因(yin)素是酸(suan)堿(jian)度(du)、氧(yang)(yang)化(hua)性(xing)(或還(huan)原性(xing))和陰(yin)離(li)子(zi)類型,其他影(ying)響因(yin)素包括酸(suan)濃度(du)、溫(wen)度(du)、氣相封(feng)閉狀態(tai)等。熱力學(xue)上,金屬(shu)(shu)在酸(suan)性(xing)溶(rong)液(ye)中的(de)(de)腐蝕很大程度(du)上取決于(yu)氫離(li)子(zi)的(de)(de)濃度(du)。一般認為,當氫離(li)子(zi)濃度(du)升高時,陰(yin)ji反(fan)應(ying)速(su)度(du)因(yin)氫離(li)子(zi)的(de)(de)放電而(er)(er)增(zeng)(zeng)(zeng)加(jia)(jia),或者金屬(shu)(shu)表(biao)面膜的(de)(de)溶(rong)解(jie)度(du)因(yin)溶(rong)液(ye)酸(suan)度(du)的(de)(de)增(zeng)(zeng)(zeng)加(jia)(jia)而(er)(er)增(zeng)(zeng)(zeng)加(jia)(jia),從而(er)(er)增(zeng)(zeng)(zeng)加(jia)(jia)金屬(shu)(shu)的(de)(de)腐蝕速(su)度(du)。此外,溶(rong)液(ye)的(de)(de)氧(yang)(yang)化(hua)還(huan)原性(xing)質(zhi)(zhi)也影(ying)響金屬(shu)(shu)的(de)(de)腐蝕。氧(yang)(yang)化(hua)劑還(huan)原產生的(de)(de)陰(yin)ji去ji化(hua)反(fan)應(ying)可以促進腐蝕,但(dan)在其他情況(kuang)下,腐蝕由于(yu)鈍化(hua)而(er)(er)受到(dao)yizhi。
環保化(hua)工儲罐在一定濃(nong)度(du)(du)范圍內,當(dang)氧(yang)(yang)(yang)化(hua)酸(suan)(suan)濃(nong)度(du)(du)增加時(shi),氧(yang)(yang)(yang)化(hua)劑(ji)的(de)(de)陰(yin)ji還原過程(cheng)加快,從(cong)而加速腐蝕。但當(dang)氧(yang)(yang)(yang)化(hua)酸(suan)(suan)濃(nong)度(du)(du)超(chao)過一定臨界值時(shi),金屬會(hui)進入被動狀(zhuang)態(tai),但腐蝕會(hui)受到yizhi。所(suo)以酸(suan)(suan)溶液的(de)(de)腐蝕性(xing)(xing)(xing)與酸(suan)(suan)的(de)(de)強(qiang)度(du)(du)即(ji)氫離(li)(li)子(zi)濃(nong)度(du)(du)有關,也取(qu)決(jue)于(yu)酸(suan)(suan)的(de)(de)陰(yin)離(li)(li)子(zi)氧(yang)(yang)(yang)化(hua)程(cheng)度(du)(du)。所(suo)以酸(suan)(suan)分為氧(yang)(yang)(yang)化(hua)性(xing)(xing)(xing)酸(suan)(suan)和(he)非氧(yang)(yang)(yang)化(hua)性(xing)(xing)(xing)酸(suan)(suan),一般是非氧(yang)(yang)(yang)化(hua)性(xing)(xing)(xing)酸(suan)(suan),硝酸(suan)(suan)和(he)濃(nong)硫酸(suan)(suan)是氧(yang)(yang)(yang)化(hua)性(xing)(xing)(xing)酸(suan)(suan)。
環(huan)保(bao)化(hua)工儲罐有哪些化(hua)工儲罐防腐保(bao)護方法?
環保化(hua)工儲罐1.耐腐蝕(shi)(shi)材(cai)料(liao)(liao)(liao)的(de)(de)(de)(de)選擇:這(zhe)是防(fang)止金(jin)屬(shu)在酸中腐蝕(shi)(shi)的(de)(de)(de)(de)常用(yong)方法。根據(ju)金(jin)片的(de)(de)(de)(de)酸濃度(du)和(he)溫度(du),選擇相應(ying)的(de)(de)(de)(de)耐腐蝕(shi)(shi)材(cai)料(liao)(liao)(liao)(包括金(jin)屬(shu)材(cai)料(liao)(liao)(liao)和(he)非(fei)金(jin)屬(shu)材(cai)料(liao)(liao)(liao))。例如(ru),奧氏體不銹鋼可用(yong)于(yu)(yu)稀硝酸,鉛可用(yong)于(yu)(yu)硫酸。但是可供選擇的(de)(de)(de)(de)金(jin)屬(shu)材(cai)料(liao)(liao)(liao)很少,因為大多數常用(yong)的(de)(de)(de)(de)金(jin)屬(shu)和(he)合金(jin)腐蝕(shi)(shi)速率都很高,如(ru)果含有雜(za)質或氧化(hua)劑,腐蝕(shi)(shi)性更(geng)強。建議選用(yong)SoleilCMI重(zhong)防(fang)腐涂(tu)(tu)(tu)層材(cai)料(liao)(liao)(liao)。該材(cai)料(liao)(liao)(liao)是一種(zhong)高功能的(de)(de)(de)(de)雙組(zu)分熱固(gu)性聚合物涂(tu)(tu)(tu)層,固(gu)化(hua)后形成的(de)(de)(de)(de)高度(du)交聯結構與其他涂(tu)(tu)(tu)層有著(zhu)根本(ben)的(de)(de)(de)(de)不同。該涂(tu)(tu)(tu)料(liao)(liao)(liao)表現出(chu)優異的(de)(de)(de)(de)產品性能和(he)chaoqiang的(de)(de)(de)(de)防(fang)腐能力,其優點如(ru)下:
①耐腐(fu)蝕(shi)性強,能(neng)保(bao)護多(duo)種腐(fu)蝕(shi)性化學品(pin),能(neng)耐受腐(fu)蝕(shi)性化學品(pin),包括強酸、強堿、氣體、溶劑和氧化劑;
②幾乎(hu)不滲(shen)透的薄膜包衣可以大(da)大(da)降低商(shang)品的吸收率,保證(zheng)商(shang)品的純度(du);
③對(dui)金屬基材(cai)、復合材(cai)料(liao)、混(hun)凝土(tu)具有優(you)異的附著(zhu)力和附著(zhu)力;
④耐磨性(xing)好,柔韌性(xing)jijia;
⑤能(neng)承受(shou)(shou)高達(da)400°F(204°C)的高溫,能(neng)承受(shou)(shou)冷(leng)熱循環性(xing)能(neng),范圍(wei)從-40°F到+400°F(-40°到204°C);
⑥耐水力清砂;
⑦表面張力低。
2.橡(xiang)膠(jiao)內襯(chen):橡(xiang)膠(jiao)內襯(chen)是(shi)一(yi)(yi)種具(ju)有一(yi)(yi)定厚度的片狀耐腐(fu)(fu)蝕橡(xiang)膠(jiao)材(cai)(cai)料,通過粘合劑附(fu)著在基(ji)材(cai)(cai)的給定表面,形成(cheng)連續完(wan)整的保護覆蓋(gai)層,隔(ge)離腐(fu)(fu)蝕介質對(dui)基(ji)材(cai)(cai)的作用,達到防腐(fu)(fu)的目的。襯(chen)里用橡(xiang)膠(jiao)品種主(zhu)要有天(tian)然(ran)橡(xiang)膠(jiao)(NR)、丁苯橡(xiang)膠(jiao)(SBR)、氯丁橡(xiang)膠(jiao)(CR)、丁基(ji)橡(xiang)膠(jiao)(HR)等。
3.玻璃(li)鋼(gang)和(he)內襯:玻璃(li)鋼(gang)內襯是在(zai)金屬的(de)內表面粘貼玻璃(li)鋼(gang),以(yi)保護(hu)設(she)備免(mian)受腐(fu)蝕,通常用于(yu)化工設(she)備。