shiyanshizhongkongzhijingdianbujinshiweileanquan,fudaimudehaikenenggaijinchanpinzhiliang,liruzaiyanmoyunxingzhong,jingdiandianhekeyingxiangchengpindadaoyouliangzhiliang,huozhezaiyoudefangzhichangyunxingzhong,jingdiandianhekezaochengxianweishuzhierbupingwo,jieguochanshengcipin。zhongsuozhouzhi,yongliucaohuoguandaoyunshuwuliaoyaojixujingdianhe,zaochengcailiaozhanfuzailiucaohuoguandaodeneibishang,zheyanghuizaochengdusai。
1、最小發火能量
jingdiandefangdianyinqidehuozaihuobaozhazaihai,shikeranxinghunheqizhongfashengdefangdiannengbianhuanweireneng,shikeranqitiwendushangsheng,chaoguofahuowendudejieguo。shiwendushangshengdaogaifahuowendudezuixiaonengliangchengweizuixiaofahuonengliang,yigaizhizuoweifashengbaozha、火災的一個目標值。
2、防止靜電災害的對策
靜電災害是由於具備了電荷的產生、電荷的積蓄、放電現象、可ke燃ran性xing物wu質zhi存cun在zai這zhe四si個ge條tiao件jian而er發fa生sheng的de。因yin此ci,如ru果guo消xiao除chu這zhe些xie條tiao件jian的de一yi個ge就jiu可ke以yi防fang止zhi災zai害hai的de發fa生sheng。重zhong要yao的de是shi應ying該gai準zhun確que地di判pan斷duan製zhi止zhi這zhe四si個ge段duan中zhong的de哪na一yi個ge,並bing采cai取qu適shi當dang的de對dui策ce。作zuo為wei防fang止zhi靜jing電dian災zai害hai的de基ji本ben措cuo施shi,擬ni從cong防fang止zhi、抑製帶靜電的觀點出發介紹其具體方法。
(1)抑製靜電的產生:由於靜電的發生源是物體之間的摩擦或分離作用等,因此要盡可能抑製這些作用。例如,在液體管路輸送、粉塵物空氣輸送或者塑料的擠壓等作業中,最好的方法是降低速度。實際上這樣會影響作業效率。石油類的安全流速在1m/s以yi下xia。靜jing電dian由you於yu物wu質zhi的de不bu同tong而er帶dai電dian量liang或huo極ji性xing不bu同tong。因yin此ci可ke行xing的de措cuo施shi是shi避bi免mian使shi用yong容rong易yi帶dai電dian的de絕jue緣yuan物wu,而er使shi用yong通tong過guo組zu合he難nan易yi產chan生sheng靜jing電dian的de材cai料liao。
(2)促使發生電荷的泄露:在zai災zai害hai對dui策ce中zhong,最zui簡jian單dan的de方fang法fa是shi進jin行xing接jie地di。該gai方fang法fa是shi通tong過guo金jin屬shu導dao體ti使shi發fa生sheng電dian荷he迅xun速su消xiao失shi到dao大da地di中zhong。但dan是shi,采cai用yong這zhe種zhong方fang法fa,如ru果guo帶dai電dian體ti是shi導dao體ti可ke以yi簡jian單dan地di消xiao除chu,而er塑su料liao或huo化hua纖xian類lei、石油類等絕緣物,由於帶電部分的電荷難以移動,效果不大。
另(ling)外(wai),還(hai)有(you)在(zai)物(wu)體(ti)內(nei)附(fu)加(jia)導(dao)電(dian)性(xing)物(wu)質(zhi)而(er)使(shi)電(dian)荷(he)泄(xie)漏(lou)的(de)方(fang)法(fa)。這(zhe)其(qi)中(zhong)包(bao)括(kuo)在(zai)輪(lun)胎(tai)或(huo)操(cao)作(zuo)人(ren)員(yuan)的(de)靴(xue)子(zi)以(yi)及(ji)化(hua)工(gong)廠(chang)的(de)地(di)板(ban)材(cai)料(liao)中(zhong)加(jia)入(ru)金(jin)屬(shu)粉(fen)末(mo)或(huo)碳(tan)黑(hei),在(zai)化(hua)纖(xian)類(lei)或(huo)塑(su)料(liao)類(lei)中(zhong)使(shi)用(yong)親(qin)水(shui)性(xing)油(you)劑(ji),以(yi)防(fang)止(zhi)帶(dai)電(dian)。如(ru)果(guo)提(ti)高(gao)空(kong)氣(qi)中(zhong)的(de)相(xiang)對(dui)濕(shi)度(du),則(ze)會(hui)在(zai)物(wu)體(ti)表(biao)麵(mian)形(xing)成(cheng)吸(xi)水(shui)層(ceng)而(er)增(zeng)強(qiang)導(dao)電(dian)性(xing),在(zai)80%以yi上shang的de濕shi度du下xia幾ji乎hu不bu會hui帶dai電dian。為wei此ci在zai有you帶dai電dian可ke能neng的de場chang所suo,可ke以yi提ti高gao調tiao節jie濕shi度du裝zhuang置zhi或huo撒sa水shui等deng方fang法fa提ti高gao濕shi度du。但dan問wen題ti是shi人ren可ke能neng感gan覺jiao不bu適shi,或huo對dui設she備bei和he產chan品pin有you不bu良liang影ying響xiang。
(3)消除帶電的電荷:在即使抑製電荷發生、cushidianhexielou,rengrandaijingdiandeqingkuangxia,yinggaijijidixiaochudaiyoudejingdian。duicikeshiyongchujingdianqi,muqianyougezhongchujingdianqizaikaifahexiaoshou。muqiankaifadechujingdianzhuangzhishiliyonglizijinxingchudian。anlizideshengchengfangshifenleiyouzifangdianshichudianqi、電壓附加式除電器、放射性同位素式除電器三種。
3、靜電保護接地
在處理熔劑、粉狀物質或其他易燃產品的地方,常存在有危險電位,因為靜電積累在設備上、處理的物料上、shenzhizaicaozuorenyuanshenshang。jingdiandianheduidihuoqitashebeifangdian,yuzheyiranhuobaozhawuzhideshihou,biranyinqihuozaiyubaozha,zaochengmeinianyouxuduorenshangwanghedailaidaliangcaichansunshi
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