PURIFYING TREATMENT OF DESULFURIZING WASTE LIQUID FOR COKE OVEN GAS,申请号JP19810169514-传众专利搜索

PURIFYING TREATMENT OF DESULFURIZING WASTE LIQUID FOR COKE OVEN GAS

申请公布号：JPS5870876(A)

申请号：JP19810169514

申请日期：1981.10.23

申请公布日期：1983.04.27

申请人：

SHIN NIPPON SEITETSU KK;KOUWA SEIKOU KK

发明人：TANAKA MASAHIKO;TASHIRO KAZUTOSHI;GOTOU YUTAKA;NOROSE ATSUO

分类号：C02F1/04;C01D5/00;C01D5/04;C02F1/02

主分类号：C02F1/04

摘要：PURPOSE:To efficiently perform the titled method with saved energy consumption, by spontaneously oxidizing and burning coke oven gas-desulfurizing waste liquid mainly consisting of NaSCN, Na2S2O3 and Na2SO4, and collecting solid Na2SO4. CONSTITUTION:Coke oven gas-desulfurizing waste liquid contg. NaSCN, Na2S2O3 and Na2SO4 as such or after being concentrated is received in a vessel, and spontaneously oxidized and burnt with a ratio of excess air above 30% at a temperature of 500-800 deg.C to recover gas contg. solid Na2SO4 and SO2. Said method is preferably carried out by using a fluidized roaster 1 where the conc. desulfurizing liquid supplied through a line A to its fluidized bed is fluidized and roasted to form Na2SO4 under the reacting conditions of a roasting temperature of 500-800 deg.C, a ratio of excess air of 30-50% and 50-60cm/sec the velocity of air flowing through the column. Said Na2SO4 is withdrawn through an overflow line B to a hopper 2, while the formed gas is withdrawn through the top part of the column.