METHOD OF MONITORING AND INHIBITING SCALE DEPOSITION IN PULP MILL EVAPORATORS AND CONCENTRATORS
摘要
<p>A method of monitoring and inhibiting scale precipitation and deposition from spent liquor in pulp mill evaporators and concentrators is disclosed. The method includes connecting a black liquor deposition monitor to a pulp mill evaporator or concentrator and measuring the thermal conductivity on the outer surface of the monitor. A controller interprets the measured thermal conductivity and determines a level of scale deposition. If the level of scale deposition is above a predetermined level, the controller is operable to introduce a scale-inhibiting composition to the spent liquor. The scale-inhibiting composition may include organic polycarboxylic acids; organic fatty acids; low molecular weight and polymeric aromatic acids; organic acid esters, anhydrides, and amides; low molecular weight and polymeric aliphatic and aromatic sulfonic acids; and low molecular weight and polymeric amines; and any combinations.</p>
申请公布号
WO2008141121(A1)
申请公布日期
2008.11.20
申请号
WO2008US63152
申请日期
2008.05.09
申请人
NALCO COMPANY;SHEVCHEKO, SERGEY, M.;DUGGIRALA, PRASAD, Y.;KOUZNETSOV, DMITRI, L.
发明人
SHEVCHEKO, SERGEY, M.;DUGGIRALA, PRASAD, Y.;KOUZNETSOV, DMITRI, L.