CA2125797A1 - Process for soil remediation - Google Patents
Process for soil remediationInfo
- Publication number
- CA2125797A1 CA2125797A1 CA 2125797 CA2125797A CA2125797A1 CA 2125797 A1 CA2125797 A1 CA 2125797A1 CA 2125797 CA2125797 CA 2125797 CA 2125797 A CA2125797 A CA 2125797A CA 2125797 A1 CA2125797 A1 CA 2125797A1
- Authority
- CA
- Canada
- Prior art keywords
- drum
- enclosed
- conveyor
- soil
- reagent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A process for soil remediation is proposed where the soil is mixed with reagent and/or heated and subsequently pulverized and aerated by a centrifugal pulverizing structure, by this the toxic ingredients in the soil are oxidated or reduced to stable non-toxic substances, the vapours emitted from the process are treated by filtering / incinerators or collected by condensation.
Description
2125 ~97 PROCESS FOR SOIL REMEDIATION
The proposed invention relates to soil remediation in general and in particular to cleaning the soil of hazardous substances like hydrocarbons or heavy metals.
There are known systems and proccsses for soil remediation involving washing the soil 5 with some reagents ,or involving heat to extract the hydrocarbons from the soil.
These systems are relatively complex involving large equipment ,difficult to be configured in a portable/mobile arrangement. The known systems are energy intensive and need extensive maintenance and large setup and decommissioning times.
The present invention eliminates the above and other associated disadvantages by the fact 10 that is comprising:
--A PULVERIZING /STRIPPING/AERATION UNIT MADE OF, in one variant:
-an eventual material to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor with mixing means, with an enclosed receiving hopper 15 and an enclosed discharge area, -reagent and or heat introduction/distribution means, -reagent substances and or heat, -whereby the reagent and or heat introduction /distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, 20 -driving means, being it electric motors or internal combustion engines, -a rotor made of a shaft, on this shaft being rigidly fixed disks and on these disk being beating/pulverizing arms in form of rigid rectangular bars, -the driving means being connected positively with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses 5 starting from the centre of the said shaft, -a closed cylindrical drum with rigid angle bars, the closed cylindrical drum having a top part and a bottom part, the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover at the top part and by a 10 bottom cover at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, 15 -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being coincident, and the length of the rectangular bars is such that the end of the rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening, and at the bottom cover there is a 20 bottom opening, -whereby the top opening is a cut in the top cover and able to let the eventual material to enter in the drum, 9 ~
-whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, -whereby the bottom opening is cut in the bottom cover and able to let the eventual material from inside the drum to get out of the drum, 5 -an exit manifold in form of a rectangular or cylindrical pipe, -whereby the bottom opening is connected with the exit manifold, so that the eventual material exiting from the drum can continue to move in the exit manifold, continuing eventually to move to the subsequent stage, -a multicyclone battery having an inlet and an outlet for contaminated air and fine dust 10 and an outlet for material ,the outlet for contaminated air and fine dust being called hereinafter "contaminated air and fine dust outlet", -whereby the exit manifold is connected with the inlet of the multicyclone battery, -an enclosed extractor conveyor ,enclosed in a rigid enclosure, -whereby the outlet for material of the said multicyclone is connected with the rigid 15 enclosure so that the material coming from the multicyclone battery to fall on the enclosed extractor conveyor, -AND ALSO TIIE PULVERIZER/AIR STRIPPING/AERATOR UNIT HAVING IN A
SECOND VARIANT:, -an eventual material to be processed being it eventually contaminated soil, 20 -an inlet enclosed FEED conveyor with mixing means, with an enclosed receiving hopper and an enclosed discharge area, -reagent and or heat introduction/distribution means, 2 ~ r~ ~ l -reagent substances and or heat, -whereby the reagent introduction /distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means, being it electric motors or internal combustion engines, 5 -a rotor made of a shaft, on this shaft being rigidly fixed disks and on these disks being beating/pulverizing arms in form of rigid rectangular bars, -the driving means being connected positively with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a 10 forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, -a closed cylindrical drum with rigid angle bars, the closed cylindrical drum having a top part and a bottom part, the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines 15 vertical, the closed cylindrical drum being closed by a top cover at the top part and being totally open at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal 20 diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being coincident, and the length of the rectangular bars is such that the end of the ~125 ~
rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening, -whereby the top opening is a cut in the top cover and able to let the eventual material 5 to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, - a chute, having an upper part and a bottom part, the chute having the edge of the upper part in form of a circle, this circle having the same diameter as the drum, 10 -whereby the drum, which is in fact a cylinder covered at the top and opened at the bottom is sitting with the bottom part on the said chute, their contact being on the said circle, -a closed conveyor enclosed in a rectangular enclosure, -the drum and the chute being placed above the conveyor, and the conveyor enclosure having a conveyor opening to accommodate the chute and to let the eventual material 15 from inside of the drum to get out into the conveyor via the chute, -whereby the enclosed conveyor having an enclosed discharge end and a driving end, both these ends being sideways in reference with the drum which is placed on the top of the conveyor via the chute, -an exhaust manifold connected with the inside of the rectangular conveyor enclosure 20 -an exhaust fan having its inlet connected with the exhaust manifold, and the outlet of the exhaust fan being appropriately directed to the subsequent eventual stage, the outlet of the exhaust fan being named herein after ,"the contaminated air and fine dust outlet", ~ ~ 57~7 -WHEREBY T~E BOT~ ABOVE VARIANTS STARTING WITH THE FEEDING
CONVEYOR AND ENDING WITH "T~E CONTAMINATED AIR AND FINE DUST
OUTLET", -IN CONTINUATION, after the contaminated air and fine dust outlet, being in 5 continuation a fine dust separator in form of fine screens,scrubbers,or bag filters, also in continuation a vapour treatment unit containing in combination or separate the following:
a dilution unit ,the dilution unit having air handling means to dilute the contaminated air stream, that is ejectors(Coanda or Korting type),or secondary high flowrate fans, carbon filter units, incineration units, gas separation membrane units, condensing units, 10 -whereby the incineration unit having ultrasonic generators to enhance the mixing of the fuel with air, whereby the above succession being actuated by a separate known airhandling unit, -W~EREBY T~E PROCESS TO USE THE ABOVE IS AS FOLLOWS:
-The contaminated soil is discharged in the enclosed feed conveyor, the reagent and or 15 heat is introduced in the space of the enclosed feed conveyor, the mixing means are mixing the contaminated soil with the said reagent and or heat, so that in the travelling time on the feed conveyor the reagent and or heat will be able to generate a reaction in the contaminated soil, particularly in relation with the heavy metal contaminants and hydrocarbon contaminants, then the contaminated soil is entering in the drum ,where the 20 rotor is rotating at a relatively high speed at least over 1000 rpm, generating g forces at the tip of the rectangular bars in excess of 800g, by this the cont~min~ted soil is impacted and centrifugated and exposed to Coriolis and centrifugal forces as well as to the aeration 2 1 2 ~ 7 caused by the movement of the rectangular bars and by the rotor, by this(which was noted in the experiments),the soil is reduced to dimensions below 100 microns, and the hydrocarbons and other contaminants are separated from the soil particles by the combined effect of the impact, centrifugal/ Coriolis forces as well as the forced aeration;
5 also because of the angle bars, the soil is forced to recoil, jump and self impact generating an autogenous process of further pulverization and forced erosion, all the above increasing the amount of oxygen to soil as well as the contact area for oxygenation and oxidation of the soil contaminants(the air containing 23.1~% oxygen),the oxygenation/oxidation flow pattern inside of the drum being configured also by the presence of the tronconic chutes 10 and the interaction between them and the combined effect of the moving rotor and the angle bars on the inside generator lines of the drum, so that when the air and the soil leave the drum space ,the contaminants are separated/oxydated and separated from the soil which is coming out clean on the extractor conveyor or the enclosed conveyor taking out the soil ;the fine dust and contaminated air being separated by the multicyclone, or being 15 simply extracted by the exhaust fan, and then under the action of the known airhandling unit passed through fine dust separation unit and the vapour treatment unit and subsequently released into atmosphere.
Below is given an example of application of the proposed invention in connection but not limited to the figures 1,2,3,4,5,6, representing:
20 Fig.1-Perspective view of the pulverizer unit variant one with pneumatic discharge at the bottom;
Fig.2-Perspective view of the pulverizer unit variant two with direct discharge on the 2 ~ 2 a ~ ~ 7 bottom extractor conveyor;
Fig.3-Perspective view fine dust separator;
Fig.4-Perspective view carbon filter;
Fig.5-Perspective view incinerator unit;
5 Fig.6-Perspective unit condensing unit;
Fig.7-Perspective view diluter unit;
Fig.8-Perspective view membrane unit;
As is illustrated in the accompanying figures, the remediation process is comprising:
--A PULVERIZING /STRIPPING/AERATION UNIT MADE OF, 10 in one variant:
-an eventual material 1 to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor 2 with mixing means 3 ,with an enclosed reccivil.g hopper 4 and an enclosed discharge area 5, -reagent and or heat introduction/distribution means 6, 15 -reagent and or heat reagent substances, -whereby the reagent and or heat introduction /distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means 7, being it electric motors or internal combustion engines, -a rotor 8 made of a shaft 9 ,on this shaft being rigidly fixed disks 10 and on these disks 20 being beating/pulverizing arms 11 in form of rigid rectangular bars 12, -the driving means being connected positively 13 with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight ~ ~ rJ ~
radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, -a closed cylindrical drum 14 with rigid angle bars 15 ,the closed cylindrical drum having 5 a top part 16 and a bottom part 17 ,the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover 18 at the top part and by a bottom cover 19 at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes 20 with the virtual 10 tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being coincident, and the length of the rectangular bars is such that the end of the 15 rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening 21 ,and at the bottom cover there is a bottom opening 22, -whereby the top opening is a cut in the top cover and able to let the eventual material 20 to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, r1 9 7 -whereby the bottom opening is cut in the bottom cover and able to let the eventual material from inside the drum to get out of the drum, -an exit manifold 23 in form of a rectangular or cylindrical pipe, -whereby the bottom opening is connected with the exit manifold, so that the eventual 5 material exiting from the drum can continue to move in the exit manifold, continuing eventually to move to the subsequent stage, -a multicyclone battery 24 having an inlet 25 and an outlet 26 for contaminated air and fine dust and an outlet for material 27 ,the outlet for cont~min~ted air and fine dust being called hereinafter "contaminated air and fine dust outlet", 10 -whereby the exit manifold is connected with the inlet of the multicyclone battery, -an enclosed extractor conveyor 28 ,enclosed in a rigid enclosure 29, -whereby the outlet for material of the said multicyclone is connected with the rigid enclosure so that the material coming from the multicyclone battery to fall on the enclosed extractor conveyor, SECOND VARIANT:, -an eventual material 1 to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor 2 with mixing means 3 ,with an enclosed receiving hopper 4 and an enclosed discharge area 5, 20 -reagent and or heat, -reagent and or heat introduction/distribution means 6, -whereby the reagent and or heat introduction /distribution means are introducing ~ ~ ~ t' 1 1 3 ~J
/distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means 7 ,being it electric motors or internal combustion engines, -a rotor 8 made of a shaft 9 ,on this shaft being rigidly fixed disks 10 and on these disks being beating/pulverizing arms in form of rigid rectangular bars 12, 5 -the driving means being connected positively 13 with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, 10 -a closed cylindrical drum 14 with rigid angle bars 15 ,the closed cylindrical drum having a top part 16 and a bottom part 17 ,the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover 18 at the top part and being totally open 19a at the bottom part, 15 -whereby inside of the drum being placed tronconic guiding chutes 20 with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry 20 axes being coincident, and the length of the rectangular bars is such that the end of the rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, ~32~ ~
-whereby at the top cover there is a top opening 21, -whereby the top opening is a cut in the top cover and able to let the eventual material to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed 5 way with the inside of the drum via the top opening, - a chute 30 ,having an upper part 31 and a bottom part 32, the chute having the edge of the upper part in form of a circle 33, this circle having the same diameter as the drum, -whereby the drum, which is in fact a cylinder covered at the top and opened at the bottom is sitting with the bottom part on the said chute, their contact being on the said circle, 10 -a closed conveyor 33 enclosed in a rectangular enclosure 34, -the drum and the chute being placed above the conveyor, and the conveyor enclosure having a conveyor opening to accommodate the chute and to let the eventual material from inside of the drum to get out into the conveyor via the chute, -whereby the enclosed conveyor having an enclosed discharge end 35 and a driving end 15 36, both these ends being sideways in reference with the drum which is placed on the top of the conveyor via the chute, -an exhaust manifold 37 connected with the inside of the rectangular conveyor enclosure -an exhaust fan 38 having its inlet connected with the exhaust manifold 39 ,and the outlet of the exhaust fan being appropriately directed to the subsequent eventual stage, the outlet 20 39 of the exhaust fan being named herein after ,"the contaminated air and fine dust outlet", -WHEREBY TIIE BOT~ ABOVE VARIANTS STARTING WITH TI~E FEEDING
CONVEYOR AND ENDING WITH "THE CONTAMINATED AIR AND FINE DUST
OUTLET", -IN CONTINUATION, after the contaminated air and fine dust outlet ,being in continuation a fine dust separator 40 in form of fine screens,scrubbers,or bag filters, also in 5 continuation a vapour treatment unit containing in combination or separate the following:
a dilution unit 40a ,the dilution unit having air handling means to dilute the contaminated air stream, that is ejectors(Coanda or Korting type),or secondary high flowrate f~ .,c~rbon filter units 41 ,incineration units 42 ,gas separation membrane units, 43 ,condensing units 44, 10 -whereby the incineration unit having ultrasonic generators to enhance the mixing of the fuel with air, whereby the above succession being actuated by a separate known airhandling unit, -W~EREBY TlEIE PROCESS TO USE T~E ABOVE IS AS FOLLOWS:
-The contaminated soil is discharged in the enclosed feed conveyor, the reagent is 15 introduced in the space of the enclosed feed conveyor, the mixing means are mixing the contaminated soil with the said reagent and or heat, so that in the travelling time on the feed conveyor the reagent and or heat will be able to generate a reaction in the contaminated soil, particularly in relation with the heavy metal contaminants and hydrocarbon contaminants, then the contaminated soil is entering in the drum ,where the 20 rotor is rotating at a relatively high speed at at least over 1000rpm, generating g forces at the tip of the rectangular bars in excess of 800g, by this the contaminated soil is impacted and centrifugated and exposed to Coriolis and centrifugal forces as well as to the aeration ~. ~ 5 ~ ~ 7 caused by the movement of the rectangular bars and by the rotor, by this(which was noted in the experiments),the soil is reduced to dimensions below 100 microns, and the hydrocarbons and other cont~mir~nts are separated from the soil particles by the combined effect of the impact, centrifugal/ Coriolis forces as well as the forced aeration;
5 also because of the angle bars, the soil is forced to recoil, jump and self impact generating an autogenous process of further pulverization and forced erosion, all the above increasing the amount of oxygen to soil as well as the contact area for oxygenation and oxidation of the soil contaminants(the air containing 23.15% oxygen),the oxygenation/oxidation flow pattern inside of the drum being configured also by the presence of the tronconic chutes 10 and the interaction between them and the combined effect of the moving rotor and the angle bars on the inside generator lines of the drum, so that when the air and the soil leave the drum space ,the contaminants are separated/oxydated and separated from the soil which is coming out clean on the extractor conveyor or the enclosed conveyor taking out the soil ;the fine dust and contaminated air being separated by the multicyclone, or being 15 simply extracted by the exhaust fan, and then under the action of the known airhandling unit passed through fine dust separation unit and the vapour treatment unit and subsequently released into atmosphere.
TIIE ADVANTAGES OF TIIE PROPOSED PROCESS ARE AS FOLLOWS:
-INTENSE OXIDATION/AERATION BASED ON THE OVER 22% OXYGEN IN T~E
20 NATURAL AIR;
-T~E SYSTEM CAN BE MOBILE OR STATIONARY DEPENDING ON T~E
APPLICATION;
-POSSIBILITY TO TREAT HYDROCARBONS BY OXIDATION/AERATION AND
OTHER CONTAMINANTS USING REAGENTS AND OR HEAT IN THE FEED
CONVEYOR;
5 -LONG RESIDENCE TIMES IN TEIE FEED CONVEYOR(OVER 60 SECONDS) AND
IN THE DRUM(OVER 60 SECO'NDS) PERMITTING TREATMENT WIT~
REAGENTS AND OXIDATION.
The proposed invention relates to soil remediation in general and in particular to cleaning the soil of hazardous substances like hydrocarbons or heavy metals.
There are known systems and proccsses for soil remediation involving washing the soil 5 with some reagents ,or involving heat to extract the hydrocarbons from the soil.
These systems are relatively complex involving large equipment ,difficult to be configured in a portable/mobile arrangement. The known systems are energy intensive and need extensive maintenance and large setup and decommissioning times.
The present invention eliminates the above and other associated disadvantages by the fact 10 that is comprising:
--A PULVERIZING /STRIPPING/AERATION UNIT MADE OF, in one variant:
-an eventual material to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor with mixing means, with an enclosed receiving hopper 15 and an enclosed discharge area, -reagent and or heat introduction/distribution means, -reagent substances and or heat, -whereby the reagent and or heat introduction /distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, 20 -driving means, being it electric motors or internal combustion engines, -a rotor made of a shaft, on this shaft being rigidly fixed disks and on these disk being beating/pulverizing arms in form of rigid rectangular bars, -the driving means being connected positively with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses 5 starting from the centre of the said shaft, -a closed cylindrical drum with rigid angle bars, the closed cylindrical drum having a top part and a bottom part, the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover at the top part and by a 10 bottom cover at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, 15 -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being coincident, and the length of the rectangular bars is such that the end of the rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening, and at the bottom cover there is a 20 bottom opening, -whereby the top opening is a cut in the top cover and able to let the eventual material to enter in the drum, 9 ~
-whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, -whereby the bottom opening is cut in the bottom cover and able to let the eventual material from inside the drum to get out of the drum, 5 -an exit manifold in form of a rectangular or cylindrical pipe, -whereby the bottom opening is connected with the exit manifold, so that the eventual material exiting from the drum can continue to move in the exit manifold, continuing eventually to move to the subsequent stage, -a multicyclone battery having an inlet and an outlet for contaminated air and fine dust 10 and an outlet for material ,the outlet for contaminated air and fine dust being called hereinafter "contaminated air and fine dust outlet", -whereby the exit manifold is connected with the inlet of the multicyclone battery, -an enclosed extractor conveyor ,enclosed in a rigid enclosure, -whereby the outlet for material of the said multicyclone is connected with the rigid 15 enclosure so that the material coming from the multicyclone battery to fall on the enclosed extractor conveyor, -AND ALSO TIIE PULVERIZER/AIR STRIPPING/AERATOR UNIT HAVING IN A
SECOND VARIANT:, -an eventual material to be processed being it eventually contaminated soil, 20 -an inlet enclosed FEED conveyor with mixing means, with an enclosed receiving hopper and an enclosed discharge area, -reagent and or heat introduction/distribution means, 2 ~ r~ ~ l -reagent substances and or heat, -whereby the reagent introduction /distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means, being it electric motors or internal combustion engines, 5 -a rotor made of a shaft, on this shaft being rigidly fixed disks and on these disks being beating/pulverizing arms in form of rigid rectangular bars, -the driving means being connected positively with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a 10 forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, -a closed cylindrical drum with rigid angle bars, the closed cylindrical drum having a top part and a bottom part, the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines 15 vertical, the closed cylindrical drum being closed by a top cover at the top part and being totally open at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal 20 diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being coincident, and the length of the rectangular bars is such that the end of the ~125 ~
rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening, -whereby the top opening is a cut in the top cover and able to let the eventual material 5 to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, - a chute, having an upper part and a bottom part, the chute having the edge of the upper part in form of a circle, this circle having the same diameter as the drum, 10 -whereby the drum, which is in fact a cylinder covered at the top and opened at the bottom is sitting with the bottom part on the said chute, their contact being on the said circle, -a closed conveyor enclosed in a rectangular enclosure, -the drum and the chute being placed above the conveyor, and the conveyor enclosure having a conveyor opening to accommodate the chute and to let the eventual material 15 from inside of the drum to get out into the conveyor via the chute, -whereby the enclosed conveyor having an enclosed discharge end and a driving end, both these ends being sideways in reference with the drum which is placed on the top of the conveyor via the chute, -an exhaust manifold connected with the inside of the rectangular conveyor enclosure 20 -an exhaust fan having its inlet connected with the exhaust manifold, and the outlet of the exhaust fan being appropriately directed to the subsequent eventual stage, the outlet of the exhaust fan being named herein after ,"the contaminated air and fine dust outlet", ~ ~ 57~7 -WHEREBY T~E BOT~ ABOVE VARIANTS STARTING WITH THE FEEDING
CONVEYOR AND ENDING WITH "T~E CONTAMINATED AIR AND FINE DUST
OUTLET", -IN CONTINUATION, after the contaminated air and fine dust outlet, being in 5 continuation a fine dust separator in form of fine screens,scrubbers,or bag filters, also in continuation a vapour treatment unit containing in combination or separate the following:
a dilution unit ,the dilution unit having air handling means to dilute the contaminated air stream, that is ejectors(Coanda or Korting type),or secondary high flowrate fans, carbon filter units, incineration units, gas separation membrane units, condensing units, 10 -whereby the incineration unit having ultrasonic generators to enhance the mixing of the fuel with air, whereby the above succession being actuated by a separate known airhandling unit, -W~EREBY T~E PROCESS TO USE THE ABOVE IS AS FOLLOWS:
-The contaminated soil is discharged in the enclosed feed conveyor, the reagent and or 15 heat is introduced in the space of the enclosed feed conveyor, the mixing means are mixing the contaminated soil with the said reagent and or heat, so that in the travelling time on the feed conveyor the reagent and or heat will be able to generate a reaction in the contaminated soil, particularly in relation with the heavy metal contaminants and hydrocarbon contaminants, then the contaminated soil is entering in the drum ,where the 20 rotor is rotating at a relatively high speed at least over 1000 rpm, generating g forces at the tip of the rectangular bars in excess of 800g, by this the cont~min~ted soil is impacted and centrifugated and exposed to Coriolis and centrifugal forces as well as to the aeration 2 1 2 ~ 7 caused by the movement of the rectangular bars and by the rotor, by this(which was noted in the experiments),the soil is reduced to dimensions below 100 microns, and the hydrocarbons and other contaminants are separated from the soil particles by the combined effect of the impact, centrifugal/ Coriolis forces as well as the forced aeration;
5 also because of the angle bars, the soil is forced to recoil, jump and self impact generating an autogenous process of further pulverization and forced erosion, all the above increasing the amount of oxygen to soil as well as the contact area for oxygenation and oxidation of the soil contaminants(the air containing 23.1~% oxygen),the oxygenation/oxidation flow pattern inside of the drum being configured also by the presence of the tronconic chutes 10 and the interaction between them and the combined effect of the moving rotor and the angle bars on the inside generator lines of the drum, so that when the air and the soil leave the drum space ,the contaminants are separated/oxydated and separated from the soil which is coming out clean on the extractor conveyor or the enclosed conveyor taking out the soil ;the fine dust and contaminated air being separated by the multicyclone, or being 15 simply extracted by the exhaust fan, and then under the action of the known airhandling unit passed through fine dust separation unit and the vapour treatment unit and subsequently released into atmosphere.
Below is given an example of application of the proposed invention in connection but not limited to the figures 1,2,3,4,5,6, representing:
20 Fig.1-Perspective view of the pulverizer unit variant one with pneumatic discharge at the bottom;
Fig.2-Perspective view of the pulverizer unit variant two with direct discharge on the 2 ~ 2 a ~ ~ 7 bottom extractor conveyor;
Fig.3-Perspective view fine dust separator;
Fig.4-Perspective view carbon filter;
Fig.5-Perspective view incinerator unit;
5 Fig.6-Perspective unit condensing unit;
Fig.7-Perspective view diluter unit;
Fig.8-Perspective view membrane unit;
As is illustrated in the accompanying figures, the remediation process is comprising:
--A PULVERIZING /STRIPPING/AERATION UNIT MADE OF, 10 in one variant:
-an eventual material 1 to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor 2 with mixing means 3 ,with an enclosed reccivil.g hopper 4 and an enclosed discharge area 5, -reagent and or heat introduction/distribution means 6, 15 -reagent and or heat reagent substances, -whereby the reagent and or heat introduction /distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means 7, being it electric motors or internal combustion engines, -a rotor 8 made of a shaft 9 ,on this shaft being rigidly fixed disks 10 and on these disks 20 being beating/pulverizing arms 11 in form of rigid rectangular bars 12, -the driving means being connected positively 13 with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight ~ ~ rJ ~
radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, -a closed cylindrical drum 14 with rigid angle bars 15 ,the closed cylindrical drum having 5 a top part 16 and a bottom part 17 ,the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover 18 at the top part and by a bottom cover 19 at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes 20 with the virtual 10 tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being coincident, and the length of the rectangular bars is such that the end of the 15 rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening 21 ,and at the bottom cover there is a bottom opening 22, -whereby the top opening is a cut in the top cover and able to let the eventual material 20 to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, r1 9 7 -whereby the bottom opening is cut in the bottom cover and able to let the eventual material from inside the drum to get out of the drum, -an exit manifold 23 in form of a rectangular or cylindrical pipe, -whereby the bottom opening is connected with the exit manifold, so that the eventual 5 material exiting from the drum can continue to move in the exit manifold, continuing eventually to move to the subsequent stage, -a multicyclone battery 24 having an inlet 25 and an outlet 26 for contaminated air and fine dust and an outlet for material 27 ,the outlet for cont~min~ted air and fine dust being called hereinafter "contaminated air and fine dust outlet", 10 -whereby the exit manifold is connected with the inlet of the multicyclone battery, -an enclosed extractor conveyor 28 ,enclosed in a rigid enclosure 29, -whereby the outlet for material of the said multicyclone is connected with the rigid enclosure so that the material coming from the multicyclone battery to fall on the enclosed extractor conveyor, SECOND VARIANT:, -an eventual material 1 to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor 2 with mixing means 3 ,with an enclosed receiving hopper 4 and an enclosed discharge area 5, 20 -reagent and or heat, -reagent and or heat introduction/distribution means 6, -whereby the reagent and or heat introduction /distribution means are introducing ~ ~ ~ t' 1 1 3 ~J
/distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means 7 ,being it electric motors or internal combustion engines, -a rotor 8 made of a shaft 9 ,on this shaft being rigidly fixed disks 10 and on these disks being beating/pulverizing arms in form of rigid rectangular bars 12, 5 -the driving means being connected positively 13 with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, 10 -a closed cylindrical drum 14 with rigid angle bars 15 ,the closed cylindrical drum having a top part 16 and a bottom part 17 ,the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover 18 at the top part and being totally open 19a at the bottom part, 15 -whereby inside of the drum being placed tronconic guiding chutes 20 with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry 20 axes being coincident, and the length of the rectangular bars is such that the end of the rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, ~32~ ~
-whereby at the top cover there is a top opening 21, -whereby the top opening is a cut in the top cover and able to let the eventual material to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed 5 way with the inside of the drum via the top opening, - a chute 30 ,having an upper part 31 and a bottom part 32, the chute having the edge of the upper part in form of a circle 33, this circle having the same diameter as the drum, -whereby the drum, which is in fact a cylinder covered at the top and opened at the bottom is sitting with the bottom part on the said chute, their contact being on the said circle, 10 -a closed conveyor 33 enclosed in a rectangular enclosure 34, -the drum and the chute being placed above the conveyor, and the conveyor enclosure having a conveyor opening to accommodate the chute and to let the eventual material from inside of the drum to get out into the conveyor via the chute, -whereby the enclosed conveyor having an enclosed discharge end 35 and a driving end 15 36, both these ends being sideways in reference with the drum which is placed on the top of the conveyor via the chute, -an exhaust manifold 37 connected with the inside of the rectangular conveyor enclosure -an exhaust fan 38 having its inlet connected with the exhaust manifold 39 ,and the outlet of the exhaust fan being appropriately directed to the subsequent eventual stage, the outlet 20 39 of the exhaust fan being named herein after ,"the contaminated air and fine dust outlet", -WHEREBY TIIE BOT~ ABOVE VARIANTS STARTING WITH TI~E FEEDING
CONVEYOR AND ENDING WITH "THE CONTAMINATED AIR AND FINE DUST
OUTLET", -IN CONTINUATION, after the contaminated air and fine dust outlet ,being in continuation a fine dust separator 40 in form of fine screens,scrubbers,or bag filters, also in 5 continuation a vapour treatment unit containing in combination or separate the following:
a dilution unit 40a ,the dilution unit having air handling means to dilute the contaminated air stream, that is ejectors(Coanda or Korting type),or secondary high flowrate f~ .,c~rbon filter units 41 ,incineration units 42 ,gas separation membrane units, 43 ,condensing units 44, 10 -whereby the incineration unit having ultrasonic generators to enhance the mixing of the fuel with air, whereby the above succession being actuated by a separate known airhandling unit, -W~EREBY TlEIE PROCESS TO USE T~E ABOVE IS AS FOLLOWS:
-The contaminated soil is discharged in the enclosed feed conveyor, the reagent is 15 introduced in the space of the enclosed feed conveyor, the mixing means are mixing the contaminated soil with the said reagent and or heat, so that in the travelling time on the feed conveyor the reagent and or heat will be able to generate a reaction in the contaminated soil, particularly in relation with the heavy metal contaminants and hydrocarbon contaminants, then the contaminated soil is entering in the drum ,where the 20 rotor is rotating at a relatively high speed at at least over 1000rpm, generating g forces at the tip of the rectangular bars in excess of 800g, by this the contaminated soil is impacted and centrifugated and exposed to Coriolis and centrifugal forces as well as to the aeration ~. ~ 5 ~ ~ 7 caused by the movement of the rectangular bars and by the rotor, by this(which was noted in the experiments),the soil is reduced to dimensions below 100 microns, and the hydrocarbons and other cont~mir~nts are separated from the soil particles by the combined effect of the impact, centrifugal/ Coriolis forces as well as the forced aeration;
5 also because of the angle bars, the soil is forced to recoil, jump and self impact generating an autogenous process of further pulverization and forced erosion, all the above increasing the amount of oxygen to soil as well as the contact area for oxygenation and oxidation of the soil contaminants(the air containing 23.15% oxygen),the oxygenation/oxidation flow pattern inside of the drum being configured also by the presence of the tronconic chutes 10 and the interaction between them and the combined effect of the moving rotor and the angle bars on the inside generator lines of the drum, so that when the air and the soil leave the drum space ,the contaminants are separated/oxydated and separated from the soil which is coming out clean on the extractor conveyor or the enclosed conveyor taking out the soil ;the fine dust and contaminated air being separated by the multicyclone, or being 15 simply extracted by the exhaust fan, and then under the action of the known airhandling unit passed through fine dust separation unit and the vapour treatment unit and subsequently released into atmosphere.
TIIE ADVANTAGES OF TIIE PROPOSED PROCESS ARE AS FOLLOWS:
-INTENSE OXIDATION/AERATION BASED ON THE OVER 22% OXYGEN IN T~E
20 NATURAL AIR;
-T~E SYSTEM CAN BE MOBILE OR STATIONARY DEPENDING ON T~E
APPLICATION;
-POSSIBILITY TO TREAT HYDROCARBONS BY OXIDATION/AERATION AND
OTHER CONTAMINANTS USING REAGENTS AND OR HEAT IN THE FEED
CONVEYOR;
5 -LONG RESIDENCE TIMES IN TEIE FEED CONVEYOR(OVER 60 SECONDS) AND
IN THE DRUM(OVER 60 SECO'NDS) PERMITTING TREATMENT WIT~
REAGENTS AND OXIDATION.
Claims (2)
1 ) PROCESS FOR SOIL REMEDIATION CHARACTERIZED BY THE FACT THAT
IS COMPRISING:
--A PULVERIZING /STRIPPING/AERATION UNIT MADE OF, in one variant:
-an eventual material to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor with mixing means and heat recovery inlet, with an enclosed receiving hopper and an enclosed discharge area, -reagent and or heat substances, -reagent and or heat introduction/distribution means, -whereby the reagent and or heat introduction/distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means, being it electric motors or internal combustion engines, -a rotor made of a shaft, on this shaft being rigidly fixed disks and on these disks being beating/pulverizing arms in form of rigid rectangular bars, -the driving means being connected positively with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, -a closed cylindrical drum with rigid angle bars, the closed cylindrical drum having a top part and a bottom part, the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover at the top part and by a bottom cover at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being ccoincident, and the length of the rectangular bars is such that the end of the rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening, and at the bottom cover there is a bottom opening, -whereby the top opening is a cut in the top cover and able to let the eventual material to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, -whereby the bottom opening is cut in the bottom cover and able to let the eventual material from inside the drum to get out of the drum, -an exit manifold in form of a rectangular or cylindrical pipe, -whereby the bottom opening is connected with the exit manifold, so that the eventual material exiting from the drum can continue to move in the exit manifold, continuing eventually to move to the subsequent stage, -a multicyclone battery having an inlet and an outlet for contaminated air and fine dust and an outlet for material ,the outlet for contaminated air and fine dust being called hereinafter "contaminated air and fine dust outlet", -whereby the exit manifold is connected with the inlet of the multicyclone battery, -an enclosed extractor conveyor ,enclosed in a rigid enclosure, -whereby the outlet for material of the said multicyclone is connected with the rigid enclosure so that the material coming from the multicyclone battery to fall on the enclosed extractor conveyor, -AND ALSO THE PULVERIZER/AIR STRIPPING/AERATOR UNIT HAVING IN A
SECOND VARIANT:, -an eventual material to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor with mixing means, with an enclosed receiving hopper and an enclosed discharge area, -reagent and or heat substances, -reagent and or heat introduction/distribution means, -whereby the reagent and or heat introduction /distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means, being it electric motors or internal combustion engines, -a rotor made of a shaft, on this shaft being rigidly fixed disks and on these disks being beating/pulverizing arms in form of rigid rectangular bars, -the driving means being connected positively with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, -a closed cylindrical drum with rigid angle bars, the closed cylindrical drum having a top part and a bottom part, the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover at the top part and being totally open at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being coincident, and the length of the rectangular bars is such that the end of the rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening, -whereby the top opening is a cut in the top cover and able to let the eventual material to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, - a chute, having an upper part and a bottom part, the chute having the edge of the upper part in form of a circle, this circle having the same diameter as the drum, -whereby the drum, which is in fact a cylinder covered at the top and opened at the bottom is sitting with the bottom part on the said chute, their contact being on the said circle, -a closed conveyor enclosed in a rectangular enclosure, -the drum and the chute being placed above the conveyor, and the conveyor enclosure having a conveyor opening to accommodate the chute and to let the eventual material from inside of the drum to get out into the conveyor via the chute, -whereby the enclosed conveyor having an enclosed discharge end and a driving end, both these ends being sideways in reference with the drum which is placed on the top of the conveyor via the chute, -an exhaust manifold connected with the inside of the rectangular conveyor enclosure -an exhaust fan having its inlet connected with the exhaust manifold, and the outlet of the exhaust fan being appropriately directed to the subsequent eventual stage, the outlet of the exhaust fan being named herein after ,"the contaminated air and fine dust outlet", -WHEREBY THE BOTH ABOVE VARIANTS STARTING WITH THE FEEDING
CONVEYOR AND ENDING WITH "THE CONTAMINATED AIR AND FINE DUST
OUTLET", -IN CONTINUATION, AFTER the contaminated air and fine dust outlet ,being in continuation a fine dust separator in form of fine screens, scubbers,or bag filters, also in continuation a vapour treatment unit containing in combination or separate the following:
a dilution unit ,the dilution unit having air handling means to dilute the contaminated air stream, that is ejectors(Coanda or Korting type),or secondary high flowrate fans, carbon filter units, incineration units, gas separation membrane units, condensing units, -whereby the incineration unit having ultrasonic generators to enhance the mixing of the fuel with air, whereby the above succession being actuated by a separate known airhandling unit.
IS COMPRISING:
--A PULVERIZING /STRIPPING/AERATION UNIT MADE OF, in one variant:
-an eventual material to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor with mixing means and heat recovery inlet, with an enclosed receiving hopper and an enclosed discharge area, -reagent and or heat substances, -reagent and or heat introduction/distribution means, -whereby the reagent and or heat introduction/distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means, being it electric motors or internal combustion engines, -a rotor made of a shaft, on this shaft being rigidly fixed disks and on these disks being beating/pulverizing arms in form of rigid rectangular bars, -the driving means being connected positively with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, -a closed cylindrical drum with rigid angle bars, the closed cylindrical drum having a top part and a bottom part, the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover at the top part and by a bottom cover at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being ccoincident, and the length of the rectangular bars is such that the end of the rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening, and at the bottom cover there is a bottom opening, -whereby the top opening is a cut in the top cover and able to let the eventual material to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, -whereby the bottom opening is cut in the bottom cover and able to let the eventual material from inside the drum to get out of the drum, -an exit manifold in form of a rectangular or cylindrical pipe, -whereby the bottom opening is connected with the exit manifold, so that the eventual material exiting from the drum can continue to move in the exit manifold, continuing eventually to move to the subsequent stage, -a multicyclone battery having an inlet and an outlet for contaminated air and fine dust and an outlet for material ,the outlet for contaminated air and fine dust being called hereinafter "contaminated air and fine dust outlet", -whereby the exit manifold is connected with the inlet of the multicyclone battery, -an enclosed extractor conveyor ,enclosed in a rigid enclosure, -whereby the outlet for material of the said multicyclone is connected with the rigid enclosure so that the material coming from the multicyclone battery to fall on the enclosed extractor conveyor, -AND ALSO THE PULVERIZER/AIR STRIPPING/AERATOR UNIT HAVING IN A
SECOND VARIANT:, -an eventual material to be processed being it eventually contaminated soil, -an inlet enclosed FEED conveyor with mixing means, with an enclosed receiving hopper and an enclosed discharge area, -reagent and or heat substances, -reagent and or heat introduction/distribution means, -whereby the reagent and or heat introduction /distribution means are introducing /distributing the reagent and or heat inside of the enclosed feed conveyor, -driving means, being it electric motors or internal combustion engines, -a rotor made of a shaft, on this shaft being rigidly fixed disks and on these disks being beating/pulverizing arms in form of rigid rectangular bars, -the driving means being connected positively with the rotor, -whereby the rigid rectangular bars are placed in the same plane of rotation either straight radial spaced equally angular wise in reference with the axis of the shaft or are placed at a forward or backward 10 degrees angle in reference with the equally spaced radiuses starting from the centre of the said shaft, -a closed cylindrical drum with rigid angle bars, the closed cylindrical drum having a top part and a bottom part, the angle bars being equally radially placed on the internal generating lines, the closed cylindrical drum being in vertical position with generating lines vertical, the closed cylindrical drum being closed by a top cover at the top part and being totally open at the bottom part, -whereby inside of the drum being placed tronconic guiding chutes with the virtual tip of the cone oriented downwards and the centre line of the cones coincident with the axis of the drum, the tronconic guiding chutes having one diameter equal with the internal diameter of the drum and the small diameter smaller than the inner diameter of the drum, -whereby the said rotor is placed and able to rotate inside of the said drum, their symmetry axes being coincident, and the length of the rectangular bars is such that the end of the rectangular bars are not touching the angular bars placed on the internal generating lines of the drum ,passing at a relatively small distance from them, -whereby at the top cover there is a top opening, -whereby the top opening is a cut in the top cover and able to let the eventual material to enter in the drum, -whereby the said enclosed discharge of the inlet feed conveyor being connected in a closed way with the inside of the drum via the top opening, - a chute, having an upper part and a bottom part, the chute having the edge of the upper part in form of a circle, this circle having the same diameter as the drum, -whereby the drum, which is in fact a cylinder covered at the top and opened at the bottom is sitting with the bottom part on the said chute, their contact being on the said circle, -a closed conveyor enclosed in a rectangular enclosure, -the drum and the chute being placed above the conveyor, and the conveyor enclosure having a conveyor opening to accommodate the chute and to let the eventual material from inside of the drum to get out into the conveyor via the chute, -whereby the enclosed conveyor having an enclosed discharge end and a driving end, both these ends being sideways in reference with the drum which is placed on the top of the conveyor via the chute, -an exhaust manifold connected with the inside of the rectangular conveyor enclosure -an exhaust fan having its inlet connected with the exhaust manifold, and the outlet of the exhaust fan being appropriately directed to the subsequent eventual stage, the outlet of the exhaust fan being named herein after ,"the contaminated air and fine dust outlet", -WHEREBY THE BOTH ABOVE VARIANTS STARTING WITH THE FEEDING
CONVEYOR AND ENDING WITH "THE CONTAMINATED AIR AND FINE DUST
OUTLET", -IN CONTINUATION, AFTER the contaminated air and fine dust outlet ,being in continuation a fine dust separator in form of fine screens, scubbers,or bag filters, also in continuation a vapour treatment unit containing in combination or separate the following:
a dilution unit ,the dilution unit having air handling means to dilute the contaminated air stream, that is ejectors(Coanda or Korting type),or secondary high flowrate fans, carbon filter units, incineration units, gas separation membrane units, condensing units, -whereby the incineration unit having ultrasonic generators to enhance the mixing of the fuel with air, whereby the above succession being actuated by a separate known airhandling unit.
2 ) PROCESS INCLUDING THE ELEMENTS DESCRIBED IN CLAIM ONE
CHARACTERIZED BY THE FACT THAT IS WORKING AS FOLLOWS:
-The contaminated soil is discharged in the enclosed feed conveyor, the reagent is introduced in the space of the enclosed feed conveyor, the mixing means are mixing the contaminated soil with the said reagent and or heat, so that in the travelling time on the feed conveyor the reagent and or heat will be able to generate a reaction in the contaminated soil, particularly in relation with the heavy metal contaminants and hydrocarbon contaminants, then the contaminated soil is entering in the drum ,where the rotor is rotating at a relatively high speed at at least over 1000rpm, generating g forces at the tip of the rectangular bars in excess of 800g, by this the contaminated soil is impacted and centrifugated and exposed to Coriolis and centrifugal forces as well as to the aeration caused by the movement of the rectangular bars and by the rotor, by this(which was noted in the experiments),the soil is reduced to dimensions below 100 microns, and the hydrocarbons and other contaminants are separated from the soil particles by the combined effect of the impact, centrifugal/ Coriolis forces as well as the forced aeration;
also because of the angle bars, the soil is forced to recoil, jump and self impact generating an autogenous process of further pulverization and forced erosion, all the above increasing the amount of oxygen to soil as well as the contact area for oxygenation and oxidation of the soil contaminants(the air containing 23.15% oxygen),the oxygenation/oxidation flow pattern inside of the drum being configured also by the presence of the tronconic chutes and the interaction between them and the combined effect of the moving rotor and the angle bars on the inside generator lines of the drum, so that when the heated air and the soil leave the drum space ,the contaminants are separated/oxydated and separated from the soil which is coming out clean on the extractor conveyor or the enclosed conveyor taking out the soil ;the fine dust and contaminated air being separated by the multicyclone, or being simply extracted by the exhaust fan, and then under the action of the known airhandling unit passed through fine dust separation unit and the vapour treatment unit and subsequently released safely into atmosphere.
CHARACTERIZED BY THE FACT THAT IS WORKING AS FOLLOWS:
-The contaminated soil is discharged in the enclosed feed conveyor, the reagent is introduced in the space of the enclosed feed conveyor, the mixing means are mixing the contaminated soil with the said reagent and or heat, so that in the travelling time on the feed conveyor the reagent and or heat will be able to generate a reaction in the contaminated soil, particularly in relation with the heavy metal contaminants and hydrocarbon contaminants, then the contaminated soil is entering in the drum ,where the rotor is rotating at a relatively high speed at at least over 1000rpm, generating g forces at the tip of the rectangular bars in excess of 800g, by this the contaminated soil is impacted and centrifugated and exposed to Coriolis and centrifugal forces as well as to the aeration caused by the movement of the rectangular bars and by the rotor, by this(which was noted in the experiments),the soil is reduced to dimensions below 100 microns, and the hydrocarbons and other contaminants are separated from the soil particles by the combined effect of the impact, centrifugal/ Coriolis forces as well as the forced aeration;
also because of the angle bars, the soil is forced to recoil, jump and self impact generating an autogenous process of further pulverization and forced erosion, all the above increasing the amount of oxygen to soil as well as the contact area for oxygenation and oxidation of the soil contaminants(the air containing 23.15% oxygen),the oxygenation/oxidation flow pattern inside of the drum being configured also by the presence of the tronconic chutes and the interaction between them and the combined effect of the moving rotor and the angle bars on the inside generator lines of the drum, so that when the heated air and the soil leave the drum space ,the contaminants are separated/oxydated and separated from the soil which is coming out clean on the extractor conveyor or the enclosed conveyor taking out the soil ;the fine dust and contaminated air being separated by the multicyclone, or being simply extracted by the exhaust fan, and then under the action of the known airhandling unit passed through fine dust separation unit and the vapour treatment unit and subsequently released safely into atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2125797 CA2125797A1 (en) | 1994-06-14 | 1994-06-14 | Process for soil remediation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2125797 CA2125797A1 (en) | 1994-06-14 | 1994-06-14 | Process for soil remediation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2125797A1 true CA2125797A1 (en) | 1995-12-15 |
Family
ID=4153809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2125797 Abandoned CA2125797A1 (en) | 1994-06-14 | 1994-06-14 | Process for soil remediation |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2125797A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825032A (en) * | 2017-03-22 | 2017-06-13 | 中国石油大学(华东) | Chromium-polluted soil humic acid is segmented clean and effective prosthetic device |
| CN107837890A (en) * | 2017-11-29 | 2018-03-27 | 南宁伯豆环保科技有限责任公司 | A kind of soil pollution processing unit |
| CN110449244A (en) * | 2019-07-02 | 2019-11-15 | 温州乾含节能科技有限公司 | Using the device that inert gas auxiliary rare earth is broken |
| CN115119592A (en) * | 2022-07-11 | 2022-09-30 | 益阳市农业科学院 | High efficiency rice cultivation is planted and is used fertilizer injection unit |
| US12083524B2 (en) | 2016-01-15 | 2024-09-10 | Torxx Kinetic Pulverizer Limited | Centrifugal pulverizing mill |
-
1994
- 1994-06-14 CA CA 2125797 patent/CA2125797A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12083524B2 (en) | 2016-01-15 | 2024-09-10 | Torxx Kinetic Pulverizer Limited | Centrifugal pulverizing mill |
| CN106825032A (en) * | 2017-03-22 | 2017-06-13 | 中国石油大学(华东) | Chromium-polluted soil humic acid is segmented clean and effective prosthetic device |
| CN107837890A (en) * | 2017-11-29 | 2018-03-27 | 南宁伯豆环保科技有限责任公司 | A kind of soil pollution processing unit |
| CN110449244A (en) * | 2019-07-02 | 2019-11-15 | 温州乾含节能科技有限公司 | Using the device that inert gas auxiliary rare earth is broken |
| CN115119592A (en) * | 2022-07-11 | 2022-09-30 | 益阳市农业科学院 | High efficiency rice cultivation is planted and is used fertilizer injection unit |
| CN115119592B (en) * | 2022-07-11 | 2024-01-26 | 益阳市农业科学院 | High efficiency rice cultivation is planted and is used fertilizer injection unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |