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Process for recycling laden fluids
| Details |
Inventors: Getty, Heather L.; Cypher, Michael S.; Hatz, David P.; Miller, Paul L.;
Assignee: Global Environmental Solutions, Inc. (Hopkins, MN)
Primary Examiner: Fortuna; Ana
Assistant Examiner:
Attorney, Agent or Firm: Merchant, Gould, Smith, Edell, Welter and Schmidt
Described is a method to recycle laden fluid containing explosives or neutralized chemical agents. For example, the explosive laden fluid is passed through four filtering stages; a clarifier, a filter press, a sand filter and, ultimately, a reverse osmosis device. The feed water to the reverse osmosis device is a saturated solution of explosive or neutralizing chemical agent. The resulting permeate is about 10 ppm of explosive or neutralizing chemical agent. |
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DETAILED DESCRIPTION OF THE INVENTION Referring to the drawing, the system for the method of recycle of explosive laden fluid is shown generally at 10.
Feed pipe 12 channels the fluid, e.
g.
water, discharged from a high pressure fluidjet explosive or chemical agent washout station into clarifier 14.
Although the present invention is not limited by the type of explosive or chemical agent to be removed from the feed fluid, the explosive removed in the preferred embodiment is TNT.
In the case of TNT, feed water discharged from the washout station is about 25,000 ppm TNT.
The clarifier 14 is a commercial unit.
Clarifiers are available from a number of manufacturers and are well known in the art.
In the clarifier 14, suspended particles of TNT settle out of the feed water.
Makeup water from the makeup water source 50 is channeled through pipe 52 whenever the reclamation system needs additional water.
The TNT sludge resulting from clarification is pumped from the bottom of the clarifier 14, through pipe 20 into the filter press 22.
The sludge is about 100,000 ppm TNT.
The filter press 22 is a METCHEM unit.
Filter presses are available from a number of manufacturers and are well known in the art.
In the filter press 22 water is mechanically wrung from the TNT particles.
The result is a saleable filter cake of TNT that is about 700,000 ppm TNT.
The water from which the TNT particles are mechanically wrung is channeled back through pipe 16 into clarifier 14.
This process of production of a filter cake is continuous.
Though a complete filter cake is not produced every cycle of the filter press 22, the filter press 22 cycles, for example, once about every 0.
5 to 1 minute.
The clarified water is pumped out of the clarifier 14 by pump 26 through pipe 24 into the sand filter 28.
The sand filter 28 is a commercial unit.
Sand filters are available from a number of manufacturers and are well known in the art.
The sand filtered water is channeled through pipe 30 into surge tank 32.
Surge tank 32 is a 1000 gallon vessel used to compensate for variances in volume flow through different points in the reclamation system
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Liquid Purification 
