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US3859174A Expired / Lapsed US ⏱️ 0.0 years remaining

Recovery of potable water from sanitary waste using solid wastes and refuse as a heat source

Assignee: Individual
•
Filing: 1972-11-14
•
Granted: 1975-01-07
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Expires: 1992-11-14
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Abstract

Abstract A process and apparatus for disposing of solid wastes, for disposing of sanitary waste waters, and for producing potable water, is disclosed, wherein solid wastes are incinerated and the heat generated during incineration is used to evaporate sanitary waste waters. Contaminated waters are first used as cooling water and then atomized into the gas stream coming from the incinerator to cool the combustion gases and evaporate the water in the contaminated water. Solid are removed from the gas stream, which also contains water vapors, and then the gases are cooled to condense the water vapors, which is suitable for use in a city water supply system.

Inventors

  • 👤 Fred W Taylor

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 13:55
CPC Classifications
C; C02; C02F; C02F9/00; C02F1/00; C02F1/02; C02F1/04; C02F1/048; C02F11/00; C02F11/12; C02F11/13; F; F23; F23G; F23G5/00; F23G5/008; F23G5/44; F23G5/46; Y; Y10; Y10S; Y10S159/00; Y10S159/905

Claims Analysis

Total Claims: 15
Claim 1
Independent Claim 156 words
A PROCESS FOR DISPOSING OF DAILY REQUIREMENTS OF LIQUID SANITARY WASTES,WITH RECOVERY OF CLEAN POTABLE WATER THEREFROM, AND FOR DISPOSING OF DAILY REQUIREMENTS OF SOLID WASTES, SAID PROCESS CONSISTING ESSENTIALLY OF INCINERATING THE SOLID WASTES AT A TEMPERATURE OF 1,300*F TO ABOUT 2,000*F TO PRODUCE COMBUSTION GASES AND A SOLID, SUBSTANTIALLY NONCOMBUSTIBLE RESIDUE, THEREAFTER ATOMIZING AQUEOUS LIQUID INTO SAID COMBUSTION GASES LOWER THE TEMPERATURE THEREOF TO ABOUT 275*F TO ABOUT 350*F, REMOVING ENTRAINED SOLIDS FROM THE COOLED COMBUSTION GASES, THEREAFTER COOLING THE RESULTING GAS STREAM BY INDIRECT HEAT EXCHANGE WITH LIQUID SANITARY WASTES TO A TEMPERATURE OF 70*-180*F TO CONDENSE WATER VAPOR IN SAID GASES, THE LIQUID SANITARY WASTES FROM THE INDIRECT HEAT EXCHANGE BEING THE AQUEOUS LIQUID WHICH IS ATOMIZED INTO THE COMBUSTION GASES AND DISCHARGING THE GASES, FROM THE REMAINDER OF THE GASES AND DISCHARGING THE GASES, COOLING THE CONDENSED WATER TO A TEMPERATURE OF LESS THAN ABOUT 90*F, TO PRODUCE CLEAN POTABLE WATER.
Claim 2
Dependent Claim 156 words
A PROCESS FOR DISPOSING OF DAILY REQUIREMENTS OF LIQUID SANITARY WASTES,WITH RECOVERY OF CLEAN POTABLE WATER THEREFROM, AND FOR DISPOSING OF DAILY REQUIREMENTS OF SOLID WASTES, SAID PROCESS CONSISTING ESSENTIALLY OF INCINERATING THE SOLID WASTES AT A TEMPERATURE OF 1,300*F TO ABOUT 2,000*F TO PRODUCE COMBUSTION GASES AND A SOLID, SUBSTANTIALLY NONCOMBUSTIBLE RESIDUE, THEREAFTER ATOMIZING AQUEOUS LIQUID INTO SAID COMBUSTION GASES LOWER THE TEMPERATURE THEREOF TO ABOUT 275*F TO ABOUT 350*F, REMOVING ENTRAINED SOLIDS FROM THE COOLED COMBUSTION GASES, THEREAFTER COOLING THE RESULTING GAS STREAM BY INDIRECT HEAT EXCHANGE WITH LIQUID SANITARY WASTES TO A TEMPERATURE OF 70*-180*F TO CONDENSE WATER VAPOR IN SAID GASES, THE LIQUID SANITARY WASTES FROM THE INDIRECT HEAT EXCHANGE BEING THE AQUEOUS LIQUID WHICH IS ATOMIZED INTO THE COMBUSTION GASES AND DISCHARGING THE GASES, FROM THE REMAINDER OF THE GASES AND DISCHARGING THE GASES, COOLING THE CONDENSED WATER TO A TEMPERATURE OF LESS THAN ABOUT 90*F, TO PRODUCE CLEAN POTABLE WATER.
Claim 3
Dependent Claim 23 words
Process according to claim 1, wherein up to 500 percent by weight of coal is added to said solid wastes prior to incineration.
Claim 4
Dependent Claim 17 words
Process according to claim 1, wherein said solid wastes are incinerated on an air jet pulse grate.
Claim 5
Dependent Claim 16 words
Process according to claim 3, wherein said incineration is with about a 60/40 overfire/underfire air ratio.
Claim 6
Dependent Claim 12 words
Process according to claim 3, wherein said incineration temperature is about 1,400*F.
Claim 7
Dependent Claim 24 words
Process according to claim 1, wherein the incinerator combustion gases are cooled to a temperature of about 300*F by atomizing said aqueous liquid therein.
Claim 8
Dependent Claim 26 words
Process according to claim 1, wherein the liquid sanitary wastes used in said indirect heat exchange contain up to 25 percent by weight of make-up water.
Claim 9
Dependent Claim 34 words
Process according to claim 1, wherein water vapors which are evaporated from said liquid sanitary wastes during said indirect heat exchange are introduced into the combustion gas stream prior to said indirect heat exchange.
Claim 10
Dependent Claim 25 words
Process according to claim 1, wherein the water condensed in said indirect heat exchange is aerated and then introduced into a city water supply system.
Claim 11
Dependent Claim 20 words
Process according to claim 1, wherein the solid residues produced in the incinerator are quenched to a temperature below 212*F.
Claim 12
Dependent Claim 23 words
Process according to claim 10, wherein the quenched solid residue is separated into a plurality of fractions by magnetic separation and/or hydraulic classification.
Claim 13
Dependent Claim 21 words
Process according to claim 1, wherein the gases discharged from the indirect heat exchange are at a temperature of about 90*F.
Claim 14
Dependent Claim 22 words
Process according to claim 1, wherein about 100-125 gallons of clean potable water are produceD for each 5-12 pounds of solid wastes.
Claim 15
Dependent Claim 24 words
Process according to claim 13, wherein about 100 gallons of clean potable water are produced per 5 pounds of solid wastes which are incinerated.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-01-06 1978-07-08 1979-01-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-01-06 1982-07-08 1983-01-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-01-06 1986-07-08 1987-01-07 $7700.00 Window Closed / Lapsed

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