報告書番号

282041

タイトル（和文）

凝縮法による排ガス中の低ＳＯ３濃度測定法の検討

タイトル（英文）

STUDY ON THE CONDENSATION METHOD FOR LOW SO3CONCENTRATION IN FLUE GAS

概要 （図表や脚注は「報告書全文」に掲載しております）

本報告は，凝縮法による排ガス中の微量ＳＯ３濃度測定方法について模擬発生ガスを用いて実験室的に検討したものである。（１）供試ＳＯ３コレクタのＳＯ３捕集率はスパイラル部で９５％以上，フィルタ部で約２％であった。（２）このＳＯ３コレクタの冷却温度範囲は，上限が酸露点，下限が水露点で制約された。（３）ガス採取管に石炭灰を付着させた場合，測定ＳＯ３濃度は最大５０％低下した。（４）コレクタに捕集した硫酸は，純水２０ｍｌで２回以上洗浄し，液量を５０ｍｌ程度として全量滴定するのが良い。（５）この滴定における滴定上の誤差はＳＯ３濃度０．５～２．５ｐｐｍの範囲で約－０．０４ｐｐｍといえた。（６）本測定法によるＳＯ３濃度

概要 （英文）

A METHOD OF DENSITY MEASUREMENT ON AN INFINITESIMAL QUANTITY OF SO3 INCLUDED IN FLUE GAS IS REVIEWED ACCORDING TO GAS CONDENSATION BY USING THE GAS PRODUCED SIMULATEDLY AT A LABORATORY. 1) COLLECTION RATE ON THE TESTED SO3 COLLECTOR WAS FOUND TO BE UP TO MORE THAN 95% AT THE SPIRAL, AND IT WAS UP TO AROUND 2% AT THE FILTER. 2)THE RANGE OF COOLING TEMPERATURE ON THE SO3 COLLECTOR WAS LIMITED TO BETWEEN ACID DEW POINT AS HIGH LIMIT AND WATER DEW POINT AS LOW LIMIT. 3) MEASURED CONCENTRATION OF SO3 COLLECTED WITH THE GAS SAMPLING TUBE, TO WHICH COAL ASHES WAS ATTACHED, WENT DOWN TO 50% AT MAXIMUM. 4) SULFURIC ACID COLLECTED IN THE COLLECTOR IS DESIRED TO BE WASHED DOWN WITH PURE WATER OF 20ML MORE THAN TWO TIMES. ALL THE SOLUTION PRODUCED BY THE WASHING SHULD BE TITRATED. 5) MEASUREMENT ERROR ON THIS TITRATION WAS FOUND TO BE ABOUT -0.004PPM WHEN THE CONCENTRATION OF SO3 IS IN THE RANGE OF 0.5 TO 2.5PPM. 6) MEASUREMENT LIMIT ON THE SO3 CONCENTRATION WAS DEFINED AS 0.3PPM WITH THE ABOVE METHOD.

報告者

キーワード