초록 ▼

Waste water containing pollutants such as suspended solids and emulsified oil is pumped continuously through a self-contained separating or polishing system utilizing a simplified plug-in module to remove the pollutants. The suspended solids are removed by mechanical filtration and the emulsified oi

Waste water containing pollutants such as suspended solids and emulsified oil is pumped continuously through a self-contained separating or polishing system utilizing a simplified plug-in module to remove the pollutants. The suspended solids are removed by mechanical filtration and the emulsified oil is separated by coalescing oil into floatable droplets which can be skimmed from a water surface and withdrawn for external accumulation. The treated waste water may be returned for further use or pumped to other facilities for further treatment.

대표청구항 ▼

A modular water polishing system for removing suspended solids and emulsified oils from a flow of waste water comprising, (a) a self-contained transportable support structure including a support platform, (b) a first, surge tank mounted on said platform and having supply means for charging a substan

A modular water polishing system for removing suspended solids and emulsified oils from a flow of waste water comprising, (a) a self-contained transportable support structure including a support platform, (b) a first, surge tank mounted on said platform and having supply means for charging a substantially continuous source of said waste water into the surge tank, (c) a second, coalescing and outlet tank carried by said platform and separated from said surge tank and connected to an outlet from said system, (d) pumping means carried by said support structure for pumping said waste water through an inlet communicating with said surge tank, (e) a plurality of first 3-way valves each having a first, second and third port, said first ports of said valves connected respectively in parallel to an output of said pumping means, said first 3-way valves having an operative flow path between said first port and said third port, and a backwash flow path between said third port and said second port, (f) a plurality of filter units mounted on said support structure outside of said tanks to remove said suspended solids from said flow and having a bottom appurtenance connected respectively to said third port of said first 3-way valves, (g) a plurality of second 3-way valves each having a first, second and third port, of which their first ports are connected respectively to a top appurtenance of said filter units, said second 3-way valves having an operative flow path between their first port and third port and a backwash flow path between their second port and their first port, (h) a plurality of coalescers to separate said suspended oils from said flow, and mounted in said second coalescing and outlet tank and communicating jointly with said third ports of said second 3-way valves, (i) oil accumulation means for collecting coalesced oils comprising a first widthwise partition mounted in said second tank and having a bottom edge spaced above the bottom of such tank to provide a submerged outlet for said flow of waste water, and a second widthwise partition mounted in said second tank spaced from said first partition and having a top horizontal edge to provide an overflow weir for said waste water flow into a clean water chamber separated from the remainder of the second tank by said second partition, said top edge selectively positioned to maintain a liquid level in said second tank to maintain said coalescers in a submerged condition within said second tank, (j) backwashing means to remove separated solids from said filter units, said backwashing means including, an intake in said clean water chamber connecting to a backwash pump, a first backwash line communicating an outlet of said backwash pump in parallel to said second ports of said second 3-way valves, respectively, and a second backwash line connecting in parallel said second port of said first 3-way valves, (k) actuating means comprising a first set of actuators carried by and operatively connected to said first 3-way valves for selectively opening and closing said operative and backwash flow paths in said first and second valves, (l) said actuating means comprising a second set of actuators carried by and operatively connected to said second 3-way valves cooperating with said first set of actuators to selectively open and close said operative and backwash flow paths in said first and second valves, (m) control means operatively connected to said actuating means to selectively activate said actuating means and place a part of said plurality of said first and second 3-way valves and the associated filter unit in a backwash mode and a remainder of said first and second 3-way valves and associated filter units in an operative mode, wherein said actuators are selectively operated by said control means to change said 3-way valves from an operative mode to a backwash mode to allow selective backwashing of individual filter units while the system continues to operate through all other of said filtEr units and uninterruptedly through said coalescers.