Purification of industrial waste water

Claim 2

APPARATUS FOR PURIFYING INDUSTRIAL WASTE FOR SEPARATING THE VARIOUS PHASES OF DIFFERENT DENSITY IN SUCH WASTE WATER, SAID APPARATUS COMPRISING A PRE-TREATMENT TANK A RECEIVE SAID WATER, SAID TANK INCLUDING A PLURITY OF COMPARTMENTS, A FIRST ONE OF SAID COMPARTMENTS HAVING AN ANTI-TURBULENCE PARTITION AND A THERMAL PARTITION SPACED FROM SAID ANTITURBULENCE PARTITION, A HEATING DEVICE HAVING A LARGE HEATEXCHANGE AREA DISPOSED IN SAID FIRST COMPARTMENT, SAID HEATING DEVICE BEING OPERATIVE TO SET UP, IN A PREDETERMINED VOLUME BETWEEN SAID ANTI-TURBULENCE AND SAID THERMAL PARTITIONS, CONVECTION CURRENTS WHICH FACILITATE THE SEPARATION OF THE PHASES MAKING UP THE WATER RECEIVED INTO SAID TANK, AND SUCTION PIPE MEANS IN SAID FIRST CMPARTMENT FOR REMOVING THE HEAVY PHASE WHICH HAS SEPARATED OUT FROM SAID WATER COMPRISING A SERIES OF HORIZONTAL OPEN-WORK MEMBERS ARRANGED PARALLEL TO THE BOTTOM OF THE TANK, SAID OPEN-WORK MEMBER FORMING GUIDE MEMBERS IN WHICH FLEXIBLE TUBES ARE MOVABLE WITH A RECIPROCATING MOTION, ONE END OF SAID TUBES BEING CONNECTED TO SUCTION AND THE OTHER END OF SAID TUBES CONTAINING AN OPENING FOR INDUCING THE HEAVY PHASE.

Claim 3

Apparatus according to claim 1, wherein said horizontal members are formed by spaced longitudinal rods connected by means of ties arranged transversely of said rods at regular intervals.

Claim 4

AppaRatus according to claim 1, wherein said horizontal guide members extend vertically into solid-walled tubes in which said flexible tubes are arranged.

Claim 5

Apparatus for purifying industrial waste water for separating the various phases of different density in such waste water, said apparatus comprising a pre-treatment tank to receive said water, said tank including a plurality of compartments, a first one of said compartments having an inlet for receiving waste water and filling said one compartment with waste water to a predetermined level and an outlet for discharging waste water from which at least a portion of at least one of said phases has been removed, an anti-turbulence partition in said one compartment adjacent said inlet, a vertically disposed thermal partition in said one compartment extending at least substantially across said one compartment and spaced from said anti-turbulence partition and intermediate the latter and said outlet, said thermal partition also being disposed so as to be immersed in said waste water, and a heating device intermediate said anti-turbulence partition and said thermal partition and disposed so as to be contacted by said waste water, said one compartment being substantially unobstructed with respect to the passage of water convection currents in the vertical direction with respect to said heating device and from said heating device to said predetermined level so as to permit waste water heated by said heating device to rise vertically to said predetermined level.

Claim 6

Apparatus for purifying industrial waste water for separating the various phases of different density in such waste water, said apparatus comprising a pre-treatment tank to receive said water, said tank including a plurality of compartments, a first one of said compartments having an inlet for receiving waste water and filling said one compartment with waste water to a predetermined level and an outlet for discharging waste water from which at least a portion of at least one of said phases has been removed, an anti-turbulence partition in said one compartment adjacent said inlet, a vertically disposed thermal partition in said one compartment extending at least substantially across said one compartment and spaced from said anti-turbulence partition and intermediate the latter and said outlet, said thermal partition also being disposed so as to be immersed in said waste water, and a heating device intermediate said anti-turbulence partition and said thermal partition and disposed so as to be contacted by said waste water, said one compartment being substantially unobstructed with respect to the passage of water convection currents in the vertical direction with respect to said heating device and from said heating device to said predetermined level so as to permit waste water heated by said heating device to rise vertically to said predetermined level.

Claim 7

Apparatus according to claim 4 wherein said anti-turbulence partition is a vertically disposed perforated plate with the perforations thereof extending from the side thereof nearer said inlet to the side thereof nearer said heating device to permit the flow of said waste water from said inlet to said heater through said perforations.

Claim 8

Apparatus according to claim 4 further comprising a thermostat disposed adjacent said heating device and so as to be immersed in the waste water heated by said heating device and connected to said heating device for control of the latter.

Claim 9

Apparatus according to claim 4 further comprising a first tiltable trough in said one compartment and a second tiltable trough in a second one of said compartments, each said trough having sides which extend at least substantially across the compartment in which it is located and each said trough being tiltable about an axis substantially parallel to said sides, said sides of said first trough, in the untilted position of the latter, extending above said predetermined level for preventing the flow of water into said first trough, at least one discharge tank and means connecting each said trough to a said discharge tank.

Claim 10

Apparatus according to claim 4 further comprising a U-shaped tube extending from said one compartment to the next adjacent one of said compartments, said tube having a pair of legs with openings at their ends, one said leg being shorter than the other and said tube being disposed with the opening of said shorter leg in said first one of said compartments at a further level below said predetermined level and being disposed with the opening of said other leg in said next adjacent one of said compartments at a level above said further level, and a float valve in said first one of said compartments and responsive to the densities of said phases and connected to said opening of said shorter leg for closing said last-mentioned opening at least when the lightest of said phases reaches said further level.

Claim 11

Apparatus as claimed in claim 4 further comprising a suction pipe extending adjacent the bottom of said first one of said compartments for removing the heaviest of said phases.

Claim 12

Apparatus as claimed in claim 4, further comprising a strainer in a third one of said compartments and disposed to be immersed in water therein, a pump connected to said strainer for withdrawing water from said third one of said compartments, and float means in said last-mentioned one compaRtment and responsive to the water level therein for controlling the operation of said pump.

Claim 13

Apparatus according to claim 10 further comprising an enclosure adjacent said third one of said compartments, said pump being located in said enclosure and said enclosure comprising a sump, and a drain-pump connected to said sump.