초록 ▼

A vehicle-mounted system for removing hydrocarbon contaminants from the soil has an inclined rotary kiln which is rotated about a substantially horizontal axis of rotation, a burner assembly at the discharge end of the kiln and a hopper for loading soil into the inlet end to advance through the kiln

A vehicle-mounted system for removing hydrocarbon contaminants from the soil has an inclined rotary kiln which is rotated about a substantially horizontal axis of rotation, a burner assembly at the discharge end of the kiln and a hopper for loading soil into the inlet end to advance through the kiln and be directly heated by the burner assembly. The exhaust stream created in the kiln is drawn through a baghouse for removal of fines, then through the catalytic incinerator to burn any unburned constituents in the exhaust stream. The temperature of the exhaust stream is monitored prior to its passage into the incinerator and at the discharge end of the incinerator as well; and the concentration of hydrocarbon constituents in the exhaust stream is regulated either by introduction of air into the exhaust stream as it is discharged from the kiln or by recirculating a portion of the exhaust stream, after filtration, into the kiln.

대표청구항 ▼

The method for removing contaminants from soil or other waste matter comprising the steps of: advancing the soil through a dryer having a combustion chamber therein, and exposing the soil to a gaseous flame in said combustion chamber to volatilize certain of the contaminants in the soil; inducing th

The method for removing contaminants from soil or other waste matter comprising the steps of: advancing the soil through a dryer having a combustion chamber therein, and exposing the soil to a gaseous flame in said combustion chamber to volatilize certain of the contaminants in the soil; inducing the flow of the volatilized contaminants in the form of exhaust gases from said combustion chamber whereby to create a negative pressure in said combustion chamber, and drawing outside air into said exhaust gases; filtering solids from said exhaust gases as they are discharged from said dryer and transferring said solids into a waste material collection area; preheating said exhaust gases to raise their temperature after filtering the solids therefrom; and followed by incinerating said exhaust gases at a higher temperature level than said dryer and less than 1700°F. to burn any unburned contaminants remaining in said exhaust gases.