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Apparatus and method for removing contaminants from fine grained soil, clay and silt

A technology of equipment and polluting particles, which is applied in the field of equipment for removing pollutants and pollutants, and can solve problems such as limited effect.

Inactive Publication Date: 2002-09-25
BIOGENESIS ENTERPRISES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As can be seen from Table 8, increasing the angle between the nozzle flow and the sediment inflow by about 30 degrees has limited effect

Method used

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  • Apparatus and method for removing contaminants from fine grained soil, clay and silt
  • Apparatus and method for removing contaminants from fine grained soil, clay and silt
  • Apparatus and method for removing contaminants from fine grained soil, clay and silt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094]The equipment constructed for this example was a continuous flow unit for cleaning fines and clays. Utilizing a series of collision cells working in parallel, throughputs of up to 80 to 100 cubic yards per hour can be achieved.

[0095] Sediments contaminated with polyaromatic hydrocarbons (PAH) above 4000ppm were selected for cleaning. The contaminated sediments were predominantly (81%) medium silts with an average particle size of less than 38 microns. Sediment is treated first to separate large particulate material. Transfer the large particle material to a standard large particle washer for disposal. The material passing through the iron grid screen flows to the pulverizer and then enters the pretreatment tank. The pulverized material is mixed, heated and mixed with water and biosurfactant chemicals. This forms the slurry.

[0096] The slurry is then sent to a vibrating screen separator, which screens the particles into two groups. Material larger than 0.5 mm i...

Embodiment 2

[0113] In this embodiment, particles above 50 mesh and below 50 mesh are selected. In this example, the temperature of the cleaning fluid was maintained at 100°F. The number of nozzle devices used was four. The intersection angle of the plane defined by the nozzle discharge flow and the input flow was maintained at 135 degrees.

[0114] Tests were conducted at discharge pressures of 6000 psi, 8000 psi and 12000 psi for each nozzle. It has been determined that when the particle size is less than 50 mesh and the discharge pressure of the nozzle device is 8,000 to 12,000 psi, the decontamination efficiency of 99% is generated for particles passing through 200 mesh. See Table 1.

[0115] Sediment Cleaning Efficiency

[0116] In this embodiment, the number of nozzles used is 4, and the pressure of each nozzle discharging the cleaning liquid is 6000 psi. The discharge angle between the plane defined by the discharge flow of the nozzle arrangement and the input flow is ...

Embodiment 4

[0120] In this embodiment, the angle of intersection between the plane defined by the nozzle discharge flow and the incoming flow is adjusted to be 45 degrees relative to the mud flow. The discharge pressure of each nozzle was fixed at 6000 psi in this example. The temperature of the cleaning solution was maintained at 100°F.

[0121] Sediment Cleaning Efficiency

[0122] In this example, the discharge pressure of the nozzle assembly was maintained at 6000 psi. The temperature of the cleaning solution was maintained at 100°F.

[0123] Sediment Cleaning Efficiency

[0124] In this embodiment, the discharge pressure of the nozzle assembly is also maintained at 6000 psi. The temperature of the cleaning solution was maintained at 100°F. In this example, the angle between the discharge point of the nozzle assembly and the input flow was increased from 90° to 135°, and the increase in pollutant removal rate was less significant compared to the results obtained...

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Abstract

The disclosure of this application relates to a method and apparatus for removing a variety of contaminants from soil, sediment, fine sand and clay. The disclosure describes an apparatus in which contaminated material that is comprised of particles having a size less than about 5 mm in diameter are injected from a nozzle (231) into a zone of discharge from one or a number of nozzles (500). These nozzles (500) are positioned to discharge liquid or cleaning fluid at a pressure from about 2000 psi to about 20,000 psi. The cleaned material is then collected and separated into liquid and solid phases. The solids, when cleaned by the use of this apparatus, can then be returned to the site without danger of contamination of the surrounding area and no disposal costs are incurred for disposition of contaminated soil.

Description

[0001] The present invention relates to apparatus and methods for the efficient removal of pollutants from fine-grained soils, clay silts and sediment particles. Summary of the invention [0002] The present invention relates to an apparatus for removing pollutants from soil, clay and sediment particles which may be found in areas contaminated by eg industrial chemicals, oil etc. The device utilizes a liquid to effectively remove pollutants from the surface of soil particles. The device is capable of creating a zone of extreme turbulence through opposing high-pressure jets directed at the same point. A slurry feed unit injects soil-contaminated slurry into the discharge area of ​​the nozzle unit. Contaminants are removed from the soil particles in the slurry as they pass through the intersection of the sprinkler and nozzle discharge streams. In this way, the contaminants are separated from the surface of the soil particles, leaving particles substantially free of contaminant...

Claims

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Application Information

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IPC IPC(8): B09C1/00B03B5/00B09C1/02B09C1/10C02F11/00
CPCB09C1/02B09C1/10B08B3/02
Inventor 墨森·C·阿米兰
Owner BIOGENESIS ENTERPRISES
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