焊煙凈化器開發(fā)設計基本計算 一、凈化器選擇類型 基于焊煙的特性,焊煙凈化器選擇具有阻燃覆膜濾料的濾筒進行過濾。 二、濾筒過濾風速的確定 根據(jù)CO2氣體保護焊煙塵發(fā)生量的特點(發(fā)煙量較大、焊煙含塵濃度高?!?.6mm實芯焊絲施焊時的發(fā)煙量為450—650mg/min;∮1.6mm藥芯焊絲施焊時的發(fā)煙量為700—900mg/min)。按照抽風量為1200m3/h推算,∮1.6mm實芯焊絲施焊時的焊煙含塵濃度為22.5—32.5mg/ m3,焊煙凈化器濾筒的過濾速度應控制在≤0.75m/min∮1.6mm藥芯焊絲施焊時的焊煙含塵濃度為35—45mg/ m3,焊煙凈化器濾筒的過濾速度應控制在≤0.65m/min。 三、焊煙凈化器濾筒的過濾面積的確定 依據(jù)處理煙氣量為1200m3/h和濾筒過濾風速為≤0.65m/min基本條件,焊煙凈化器濾筒的過濾面積應≥10m2,按照適用于焊煙凈化處理技術要求,選擇3個RH/F3566型焊接煙塵專用濾筒(過濾介質為RH2F;上蓋外徑為350mm;底蓋外徑為350mm;上蓋內(nèi)徑為240mm;高度為600mm;過濾面積為10m2)。(江陰人和環(huán)保設備有限公司生產(chǎn)) 四、焊煙凈化器風機的確定 1、焊煙凈化器總壓損Σ△P總計算 ⑴ 吸煙罩口壓損△P吸罩計算
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