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                                              “除塵設備”中的“塵”指的具體是什么?

                                              作者: 發布時間:2017-05-26 瀏覽次數:75

                                                “除塵”所涉及的多相混合物也稱氣相懸浮體系或氣溶膠即通常所說的“粉塵”。它們是沉降速度可以忽略的微小固體粒子、液體粒子或這些粒子在氣體介質中的懸浮體系。

                                                粉塵是生產環境中有害物質存在的一種主要形態,它會導致塵肺的發生。生產性粉塵是指在生產過程中形成并能較長時間飄浮在空氣中的固體微粒.分散于其中的細小顆粒叫做塵粒或微粒,而塵粒的堆積狀態叫做粉體。

                                                根據成因的不同,氣相懸浮系可分為兩大類:分散性的和凝聚性的。分散性的塵粒一般稱為粉塵或塵灰,是將固體破碎或研磨成粉末或液體噴成霧沫而成,或由于其他機械原因,致使固體或液體成為微粒,飛揚而懸浮于氣休中。粉塵微粒大小通常大于lum.

                                                凝聚性的塵粒是氣體或蒸氣質點的凝聚。或由兩種氣體或蒸氣經過化學反應而得。凝聚所得微粒,固體的稱為煙,液體的稱為霧。煙與霧的塵粒人小通常在0.014m-0. 015m之間.


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