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class="97usynk" id="content_box-16459508221890-0" class="d_gridCell_0 p_gridCell"><div class="7zo27ai" id="c_new_detail_003-16459649539960"> <div id="vkbuvzo" class="e_container-2 s_layout"> <div id="r2di17u" class="cbox-2-0 p_item"><h1 class="e_h1-3 s_subtitle"> 電器工程氣體應(yīng)用 </h1><hr class="e_line-4 s_line" /><div id="rifjwtc" class="e_container-43 s_layout"> <div id="2qtw82o" class="cbox-43-0 p_item"><div id="p5wqzwc" class="e_container-45 s_layout"> <div id="s2vbzv8" class="cbox-45-0 p_item"><p class="e_text-31 s_link"> 發(fā)布時(shí)間： </p></div> <div id="q7kz3ff" class="cbox-45-1 p_item"><P class="e_timeFormat-30 s_link">2024-03-30</P></div> </div></div> <div id="ignsptl" class="cbox-43-1 p_item"><div id="utrf5bh" class="e_container-46 s_layout"> <div id="v7577c7" class="cbox-46-0 p_item"><p class="e_text-28 s_link"> 來(lái)源： </p></div> <div id="g7wtge8" class="cbox-46-1 p_item"><p class="e_text-27 s_link"> </p></div> </div></div> <div id="2tvjsx7" class="cbox-43-2 p_item"><div id="pe1vj5m" class="e_container-48 s_layout"> <div id="3jhcznh" class="cbox-48-0 p_item"><p class="e_text-50 s_link"> 作者： </p></div> <div id="cj7lphm" class="cbox-48-1 p_item"><p class="e_text-49 s_link"> </p></div> </div></div> </div><hr class="e_line-6 s_line" /><div id="zyfaplh" class="e_container-51 s_layout"> <div id="pnh7p1v" class="cbox-51-0 p_item"><div id="t2pu72p" class="e_richText-52 s_link"> 在當(dāng)今的電力工程領(lǐng)域中，六氟化硫是一種應(yīng)用廣泛的電負(fù)性氣體，從它發(fā)明至今，已有百年歷史。 </div></div> </div><div id="v277v6v" class="e_richText-7 s_link"> <p><img src="https://omo-oss-image.thefastimg.com/portal-saas/pg2024012517545815021/cms/image/144faf55-4ea4-45f1-991c-8916b141104c.jpg" style="float: none; display: block; margin-left: auto; margin-right: auto; width: auto; height: auto; max-width: none;" /></p> <p>　　在當(dāng)今的電力工程領(lǐng)域中，六氟化硫是一種應(yīng)用廣泛的電負(fù)性氣體，從它發(fā)明至今，已有百年歷史。它最初是由法國(guó)兩位化學(xué)家Moissan和Lebeau于1900年合成的人造惰性氣體，1940年前后，美國(guó)軍方將其用于曼哈頓計(jì)劃(核軍事)，1947年成為商用。當(dāng)前六氟化硫氣體主要用于電力工業(yè)中。作為性能優(yōu)良的絕緣和滅弧氣體，六氟化硫氣體主要用于幾種類型的電氣設(shè)備：六氟化硫斷路器、六氟化硫負(fù)荷開(kāi)關(guān)設(shè)備，六氟化硫絕緣輸電管線，六氟化硫變壓器及六氟化硫絕緣變電站。其中80%用于高中壓電力設(shè)備。</p> <p>　　六氟化硫氣體化學(xué)性質(zhì)穩(wěn)定，微溶于水、醇及醚，可溶于氫氧化鉀，不與氫氧化鈉、液氨、鹽酸及水起化學(xué)的反應(yīng)。300℃以下干燥環(huán)境中與銅、銀、鐵、鋁不反應(yīng)。500℃以下對(duì)石英不起作用。250℃時(shí)與金屬鈉反應(yīng)，-64℃時(shí)在液氨中反應(yīng)。與硫化氫混合加熱則分解。200℃時(shí)，在特定的金屬如鋼及硅鋼存在下，能促使其緩慢分解。</p> <p>　　六氟化硫耐電強(qiáng)度為同一壓力下氮?dú)獾?.5倍，擊穿電壓是空氣的2.5倍，滅弧能力是空氣的100倍，是一種優(yōu)于空氣和油之間的新一代超高壓絕緣介質(zhì)材料。六氟化硫以其良好的絕緣性能和滅弧性能，在電力工業(yè)中應(yīng)用廣泛，如斷路器、高壓變壓器、氣封閉組合電容器、高壓傳輸線、互感器等。電子級(jí)高純六氟化硫是一中理想的電子蝕刻劑，被大量應(yīng)用于微電子技術(shù)領(lǐng)域。采礦工業(yè)用作為反吸附劑，用于礦井煤塵中置換氧。高純六氟化硫還因其化學(xué)惰性、無(wú)毒、不燃及無(wú)腐蝕性，還被廣泛應(yīng)用于金屬冶煉(如鎂合金熔化爐保護(hù)氣體)、航空航天、醫(yī)療(X光機(jī)、激光機(jī))、氣象(示蹤分析)、化工(高級(jí)汽車輪胎、新型滅火器)等。隨著當(dāng)今科技的發(fā)展，六氟化硫涉及的領(lǐng)域不斷擴(kuò)展，被越來(lái)越多的基礎(chǔ)領(lǐng)域和科技領(lǐng)域廣泛應(yīng)用。</p> <p>　　但是，六氟化硫具有一定危險(xiǎn)性。六氟化硫純品,毒性較低、性狀穩(wěn)定，但人在吸入80%六氟化硫+20%的氧氣的混合氣體幾分鐘后，人體會(huì)出現(xiàn)四肢麻木，輕度興奮癥狀。六氟化硫氣體充入高壓開(kāi)關(guān)柜內(nèi)有一定的壓力，因此，氣體泄漏的概率較高，而空氣中的氧氣含量充足，這樣使得六氟化硫泄漏后與氧氣結(jié)合產(chǎn)生毒性的條件充分。這是需要防護(hù)的情況之一。除此之外，一旦六氟化硫氣體遇到高熱、高溫，如電弧，會(huì)產(chǎn)生出副產(chǎn)物—氧化硫和氟化氫氣體，它們與未分解的六氟化硫氣體共存。此時(shí)就有三種毒氣存在。</p> <p>　　二.六氟化硫斷路器(GCB)簡(jiǎn)介</p> <p>　　六氟化硫斷路器，簡(jiǎn)稱GCB，是利用六氟化硫氣體作為滅弧介質(zhì)和絕緣介質(zhì)的一種斷路器。六氟化硫用作斷路器中滅弧介質(zhì)始于20世紀(jì)50年代初，由于這種氣體的優(yōu)異特性，使這種斷路器單斷口在電壓和電流參數(shù)方面大大高于壓縮空氣斷路器和少油斷路器，并且不需要高的氣壓和相當(dāng)多的串聯(lián)斷口數(shù)。在60～70年代，六氟化硫斷路器已廣泛用于超高壓大容量電力系統(tǒng)中。80年代初已研制成功363千伏單斷口、550千伏雙斷口和額定開(kāi)斷電流達(dá)80、100 千安的六氟化硫斷路器。而如今，它更是廣泛的用在電力領(lǐng)域中，成為了不可或缺的設(shè)備之一。</p> <p>　　與傳統(tǒng)斷路器相比，六氟化硫斷路器具有以下顯著優(yōu)點(diǎn)。</p> <p>　　1.能夠充分發(fā)揮氣流的吹弧效果，滅弧室體積小、結(jié)構(gòu)簡(jiǎn)單、開(kāi)斷電流大、燃弧時(shí)間短，開(kāi)斷電容或電感電流無(wú)重燃或無(wú)復(fù)燃，過(guò)電壓低。</p> <p>　　2.電氣壽命長(zhǎng)。在50kA滿容量情況下可連續(xù)開(kāi)斷19次，累計(jì)開(kāi)斷電流可達(dá)4200kA，且適于頻繁操作。</p> <p>　　3.絕緣水平高。六氟化硫氣體在0.3MPa氣壓時(shí)，通過(guò)了各種絕緣試驗(yàn)并有較大裕度，累計(jì)開(kāi)斷電流3000kA以后，在0.3MPa氣壓下每個(gè)斷口還可耐受工頻電壓250kV達(dá)1 min，將六氟化硫氣體減至零表壓仍可耐受工頻電壓166.4kV電壓5分鐘。</p> <p>　　4.密封性能好。六氟化硫氣體含水量低，滅弧室、電阻和支柱分成獨(dú)立氣隔，現(xiàn)場(chǎng)安裝時(shí)不用打開(kāi)，安裝好后用自動(dòng)接頭連通，且安裝檢修方便，并可防止臟物和水分進(jìn)入斷路器內(nèi)部。</p> <p>　　5.自我保護(hù)和監(jiān)視系統(tǒng)完備。斷路器中的信號(hào)缸可實(shí)現(xiàn)對(duì)斷路器的自我保護(hù)，密度繼電器可以監(jiān)視六氟化硫氣體泄漏，壓力開(kāi)關(guān)和安全閥可以監(jiān)視液壓機(jī)構(gòu)壓力，保護(hù)液壓系統(tǒng)安全。除此之外，液壓機(jī)構(gòu)還采用了可防止 "失壓慢分"的閥系統(tǒng)，本體上就可進(jìn)行機(jī)構(gòu)閉鎖，保證運(yùn)行安全。</p> <p>　　雖然六氟化硫斷路器具有上述諸多優(yōu)點(diǎn)，但由于六氟化硫本身的缺陷，使得由它制成的斷路器也存在很多缺陷。六氟化硫氣體在放電時(shí)的高溫下會(huì)分解出有腐蝕性的氣體，對(duì)鋁合金有嚴(yán)重的腐蝕作用，對(duì)酚醛樹(shù)脂層壓材料、瓷絕緣也有損害。若把六氟化硫和氮?dú)饣旌鲜褂?，?dāng)六氟化硫含量超過(guò)20%～30%時(shí)，其絕緣強(qiáng)度已和全充六氟化硫時(shí)絕緣強(qiáng)度相同，而腐蝕性又大大減少，因此六氟化硫?；旌系?dú)馐褂茫诹驍嗦菲髦?，六氟化硫氣體的含水量必須嚴(yán)格規(guī)定不能超過(guò)標(biāo)準(zhǔn)。水會(huì)與電弧分解物中的四氟化硫產(chǎn)生氫氟酸而腐蝕材料。當(dāng)水分含量達(dá)到飽和時(shí)，還會(huì)在絕緣件表面凝露，使絕緣強(qiáng)度顯著降低，甚至引起沿面放電。運(yùn)行經(jīng)驗(yàn)及上述論析都表明：六氟化硫斷路器由于絕緣結(jié)構(gòu)體積較小，若六氟化硫氣體的含水量較高，則將使絕緣水平大大下降，接觸電阻急劇增加，在運(yùn)行中易發(fā)生損壞或爆炸事故。因此，各制造廠及運(yùn)行部門(mén)都要求有嚴(yán)格的密封工藝，同時(shí)規(guī)定六氟化硫氣體的含水量不得超過(guò)標(biāo)準(zhǔn)。中國(guó)的標(biāo)準(zhǔn)是六氟化硫氣體的含水量應(yīng)小于</p> </div></div> </div> <input type="hidden" name="propJson" 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