【摘要】：隨著人們對(duì)生存環(huán)境要求的日益嚴(yán)格,環(huán)境污染也得到了社會(huì)各界的廣泛關(guān)注,現(xiàn)如今空氣中的粉塵濃度嚴(yán)重超標(biāo),導(dǎo)致霧霾天氣的頻繁出現(xiàn),而空氣中的粉塵主要是源于燃煤電廠的排放。雖然我國(guó)環(huán)保標(biāo)準(zhǔn)的不斷提高,但是對(duì)粉塵的控制也不甚理想。電除塵器作為燃煤電廠處理煙氣的主要手段之一,近幾年來越來越多的人將目光放在對(duì)電除塵器的改進(jìn)上。通過對(duì)電除塵器本體的改進(jìn),來提高除塵效率,以達(dá)到對(duì)環(huán)境污染治理的目的。本文針對(duì)用金屬陶瓷替代傳統(tǒng)的電除塵器的鋼極板進(jìn)行可行性論證,以研究用金屬陶瓷這一新型材料替代傳統(tǒng)電除塵器的鋼材極板。首先,用泡沫金屬同二硼化鈦和鐵、鈷、鉬的粉末(體積比1:1:1:7)進(jìn)行過量浸漬負(fù)載制備金屬陶瓷。去除表面多余的粉末,產(chǎn)物在真空條件下于800℃、900℃、1000℃、1100℃、1200℃的溫度梯度下進(jìn)行燒結(jié)。通過實(shí)驗(yàn)結(jié)果發(fā)現(xiàn),用泡沫金屬所負(fù)載的金屬陶瓷板燒制出來的硬度相對(duì)較差,達(dá)不到使用標(biāo)準(zhǔn)。再對(duì)混合粉末(鐵、鈷、鉬及二硼化鈦粉末體積比為1:1:1:7)緩慢加壓到30Mpa,在該壓力下維持1分鐘。之后將壓制成型的混合粉末,于真空條件下進(jìn)行高溫?zé)Y(jié)。本研究針對(duì)金屬陶瓷替代傳統(tǒng)的電除塵器極板進(jìn)行可行性論證。將自己制備的金屬陶瓷同購(gòu)買的商用金屬陶瓷進(jìn)行導(dǎo)電性、硬度、致密性、板電流密度、高溫抗氧化性等特性的對(duì)比。通過SEM、XRD、金相顯微鏡等手段,從本質(zhì)上分析自制的金屬陶瓷的各種性能變化。最后再將金屬陶瓷和鐵、不銹鋼等傳統(tǒng)極板材料性能進(jìn)行對(duì)比分析,研究用金屬陶瓷的優(yōu)異之處,及替代傳統(tǒng)的鋼極板的可能性。以上的研究結(jié)果表明:相比于傳統(tǒng)的極板材料,金屬陶瓷的密度、耐高溫腐蝕性和致密性更加優(yōu)異,而燒結(jié)樣品的硬度和導(dǎo)電性不如傳統(tǒng)的鋼板材料,但相差不大。根據(jù)其綜合性能來考慮,金屬陶瓷可以替代傳統(tǒng)的鋼板材料,作為濕式電除塵器的極板。通過研究可以得出以下結(jié)論:金屬陶瓷作為電除塵器電極具有可靠性。用金屬陶瓷替代傳統(tǒng)鋼板做電除塵器的極板具有非常大的應(yīng)用前景。用金屬陶瓷對(duì)除塵器極板進(jìn)行改造,也能有效的提高除塵器的除塵效率。
[Abstract]:With the increasingly stringent requirements for the living environment, environmental pollution has been widely concerned by all walks of life. Nowadays, the dust concentration in the air is seriously exceeding the standard, resulting in frequent occurrence of haze weather. Dust in the air is mainly due to emissions from coal-fired power plants. Although our country environmental protection standard unceasingly enhances, but to the dust control also is not very ideal. As one of the main means of treating flue gas in coal-fired power plants, more and more people pay attention to the improvement of electrostatic precipitators in recent years. The dust removal efficiency is improved by improving the body of the electrostatic precipitator in order to achieve the purpose of environmental pollution control. In this paper, the feasibility of using cermet to replace the steel plate of the traditional electrostatic precipitator is demonstrated in order to study the replacement of the steel plate of the traditional electrostatic precipitator with cermet as a new material. Firstly, the metal ceramics were prepared by impregnating the foam metal with titanium diboride, iron, cobalt and molybdenum powder (volume ratio 1: 1: 1: 7). The superfluous surface powder was removed and the product was sintered under the temperature gradient of 800 鈩，

本文編號(hào)：2242576