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5006322 Controlling pollutants from boilers
VI
New Patents
fall of the solid waste material onto the infeed conveyor. A second curtain is positioned between the conveyors to prevent material from falling therebetween. The infeed conveyor is operated at about twice the speed of the receiving conveyor.
5006239
stress metals in a measure of said body of water, and said dye producing a third absorbance value when reacted at the same concentration with only the transition metal contained in a measure of said body of water; determining the second and third absorbance values and resolving their differences to determine the concentration of the tracer and, separately, the concentration of said stress metals.
APPARATUS FOR TREATMENT OF OILY SLUDGE Surendra K Mishra assigned to Tetra Technologies Inc A novel apparatus removes hydrophobic oil from solid particulates in oily sludge waste such as waste material from oil refineries, drilling fluids or muds brines, and other chemical wastes which have solid particulates contaminated with oil. The process involves separation of different components of the sludge on the basis of their size, density and physio-chemical differences. Coarse particulates are removed with the use of screening systems such as sieve bends or vibrosieves. Oil is removed from these coarse particulates with water rinsing. Oil is removed from fine particles by gravity separation, which separates the sludge into high and low density fractions. Froth flotation is used to remove hydrophilic materials from the high density fraction. Froth flotation may involve the use of frothing agents, surface modifying agents and surfactants, the selection of which generally depends on the composition of the sludge, the physical and chemical characteristics of the sludge, and the desired separation composition.
5006322 CONTROLLING POLLUTANTS FROM BOILERS Wolfram G Schuetzenduebel, James Honan assigned to Blount Energy Resource Corp A method and apparatus for controlling pollution and flue gases from a boiler using municipal solid waste as a fuel. The flue gases pass through internal and external economizers before entering a reactor in which the gases are treated with lime or other reactant in slurry form to neutralize the acid components of the flue gases. The heat of the flue gases dries the products of the reaction and the excess reactants so that they may be separated from the flue gas in subsequent separator, which is a baghouse filter. The feed of the reactant to the reactor is modified irr accordance with the concentration of acid cow stituents in the flue gas, and concurrently' the operation of the economizers is modified to raise the temperature of the flue gas exiting the economizers when the feed of reactant is increased and vice versa. The temperature of the flue gas is increased by causing the feed water to bypass the external economizer in direct relation to the quantity of reactant fed to the reactor.
5006311 5006639 MONITORING PERFORMANCE OF A TREATING AGENT ADDED TO A BODY OF WATER John E Hoots, Rodney H Banks assigned to Nalco Chemical Company Analyzing the level of a treating agent and/or stress metals in a body of water containing an inert transition metal tracer added to the water proportionally with the treating agent by determining the absorbance (first absorbance value) ofa reagent dye added to water, said dye producing a second absorbance value when reacted at the same concentration with the tracer and
METHOD
OF COAGULATING SLUDGE
Show Tono, Toshiyuk Miki, Yoshihide Dairokuno, Jyun Kataoka, Tokyo, Japan assigned to Aoki Corporation The present invention provides a method of coagulating sludge, which comprises adding sequentially an anionic polymer coagulant and a cationic polymer coagulant to sludge, and furthermore, adding an anionic polymer coagulant. According to the present invention, it is possible to coagulate sludge at a far higher efficiency with
New Patents
fall of the solid waste material onto the infeed conveyor. A second curtain is positioned between the conveyors to prevent material from falling therebetween. The infeed conveyor is operated at about twice the speed of the receiving conveyor.
5006239
stress metals in a measure of said body of water, and said dye producing a third absorbance value when reacted at the same concentration with only the transition metal contained in a measure of said body of water; determining the second and third absorbance values and resolving their differences to determine the concentration of the tracer and, separately, the concentration of said stress metals.
APPARATUS FOR TREATMENT OF OILY SLUDGE Surendra K Mishra assigned to Tetra Technologies Inc A novel apparatus removes hydrophobic oil from solid particulates in oily sludge waste such as waste material from oil refineries, drilling fluids or muds brines, and other chemical wastes which have solid particulates contaminated with oil. The process involves separation of different components of the sludge on the basis of their size, density and physio-chemical differences. Coarse particulates are removed with the use of screening systems such as sieve bends or vibrosieves. Oil is removed from these coarse particulates with water rinsing. Oil is removed from fine particles by gravity separation, which separates the sludge into high and low density fractions. Froth flotation is used to remove hydrophilic materials from the high density fraction. Froth flotation may involve the use of frothing agents, surface modifying agents and surfactants, the selection of which generally depends on the composition of the sludge, the physical and chemical characteristics of the sludge, and the desired separation composition.
5006322 CONTROLLING POLLUTANTS FROM BOILERS Wolfram G Schuetzenduebel, James Honan assigned to Blount Energy Resource Corp A method and apparatus for controlling pollution and flue gases from a boiler using municipal solid waste as a fuel. The flue gases pass through internal and external economizers before entering a reactor in which the gases are treated with lime or other reactant in slurry form to neutralize the acid components of the flue gases. The heat of the flue gases dries the products of the reaction and the excess reactants so that they may be separated from the flue gas in subsequent separator, which is a baghouse filter. The feed of the reactant to the reactor is modified irr accordance with the concentration of acid cow stituents in the flue gas, and concurrently' the operation of the economizers is modified to raise the temperature of the flue gas exiting the economizers when the feed of reactant is increased and vice versa. The temperature of the flue gas is increased by causing the feed water to bypass the external economizer in direct relation to the quantity of reactant fed to the reactor.
5006311 5006639 MONITORING PERFORMANCE OF A TREATING AGENT ADDED TO A BODY OF WATER John E Hoots, Rodney H Banks assigned to Nalco Chemical Company Analyzing the level of a treating agent and/or stress metals in a body of water containing an inert transition metal tracer added to the water proportionally with the treating agent by determining the absorbance (first absorbance value) ofa reagent dye added to water, said dye producing a second absorbance value when reacted at the same concentration with the tracer and
METHOD
OF COAGULATING SLUDGE
Show Tono, Toshiyuk Miki, Yoshihide Dairokuno, Jyun Kataoka, Tokyo, Japan assigned to Aoki Corporation The present invention provides a method of coagulating sludge, which comprises adding sequentially an anionic polymer coagulant and a cationic polymer coagulant to sludge, and furthermore, adding an anionic polymer coagulant. According to the present invention, it is possible to coagulate sludge at a far higher efficiency with