METHOD AND APPARATUS FOR CONTROLLING INJECTION OF HYDROGEN SULFIDE REMOVING AGENT,申请号JP19970326091-传众专利搜索

METHOD AND APPARATUS FOR CONTROLLING INJECTION OF HYDROGEN SULFIDE REMOVING AGENT

申请公布号：JPH11156374(A)

申请号：JP19970326091

申请日期：1997.11.27

申请公布日期：1999.06.15

申请人：

PUB WORKS RES INST MINISTRY OF CONSTR;KURITA WATER IND LTD

发明人：OKAMOTO SEIICHIRO;TANAKA SHUJI;KITAGAWA MITSUO;MAEJIMA NOBUYOSHI;MASUKO MITSUHIRO

分类号：C02F1/00;C02F1/58;C02F1/72;(IPC1-7):C02F1/72

主分类号：C02F1/00

摘要：PROBLEM TO BE SOLVED: To properly control the injection amt. of nitrate added to sewage as a hydrogen sulfide removing agent in order to prevent the generation of hydrogen sulfide in a sewage pressure feed pipe. SOLUTION: The addition amt. of nitrate is controlled on the basis of a value C calculated by C= A×(0.1+0.9×100/D)×1.07<(t-15)>×T}<2> /4 [wherein A is a consumption speed constant (mg-N/hr) of nitrate at a water temp. of 15 deg.C; (t) is water temp. ( deg.C); T is the stagnagtion time (hr) of sewage in a pressure feed pipe; D is the inner diameter (mm) of the pressure feed pipe; and C is a nitrate addition ratio (mg-N/L-sewage)]. By this constitution, by measuring sewage flow velocity or flow rate for calculating the water temp. (t) and the stagnation time T and calculating C from the other constants A, D, chemical injection control can be easily and properly performed.