on-line sorting technologies for cca treated wood sarasota team meeting february 27, 2001
TRANSCRIPT
Objective
To design and implement an automated system to effectively sort CCA-treated wood from other wood types at C&D facilities
Project Tasks
Task 1: Construct Shelter
Task 2: Construct Conveyor
Task 3: Lab Test and Develop Detector
Task 4: Install and Field Test Conveyor & Detector
Task 5: Operate Sorting System and Document Performance
Description 2000 2001
M A M J J A S O N D J F M A M J J A S
Task 1: Construct Shelter X
Task 2 Construct Conveyor X
Task 3: Develop Detector X X
Task 4: Install/Test X
Task 5: Operate X
Environ. Cert. & Scope X
Progress Reports X X X X
Final Report X
Participants
• Metal shelter design, fabrication and assembly – Trident
• Concrete slab design – Sarasota County
• Concrete form – Meyer and Gabbert
• Concrete pour, anchor bolts and project management – Anderson and Ellis
• Electrical – Claxton Electric
Pull permit, construct concrete
form, electrical
Permit Review by BDAnd Zoning
6 Wks
1.5 Wks
1 Wk
Pour concrete and allow for curing
Permit application completed and submitted to building department (BD)
Delivery and assembly of
shelter
Schedule and Timeline
October
18 25
November
9 16 30
December
8 18 30
2+ WksPull permit,
construct concrete form
Permit Review by BDAnd Zoning
6 Wks
3 Wks
1 Wk
Pour concrete and allow for curing
Permit application completed and submitted to building department (BD)
Delivery and assembly of
shelterSchedule and Timeline
October
18 25
November
9 16 30
December
8 21 27 29
3 days
January 2001
5 8
Electrical conduits installed
***Control room and final electrical wiring installed on January 23, 2001
Construction Process
• Concrete form
• Electrical Conduit Installation
• Concrete Pour
• Shelter Assembly
• Electric Wiring Installation
Control Room Completion
• Interior control room built with recycled materials (from on-site) by Meyer and Gabbert
• Control room will be finished by carpenter– Outside painted (off-white or taupe available)– Roofed (shingles available?)– Recycled wood paneling on interior– Door knob– Shelves– Cleaned
CCA-TREATED
WOOD
INCLINE CONVEYOR
OT
HE
R W
OO
DT
YP
ES
RO
L L- OF
F
30’2.5’
4.5’2.5’10’10’26’
5’
10.5’ Horizontal Guideto Align Wood
1’
Electric Panel for Conveyor
ROLLERCONVEYOR
BELTCONVEYOR
40’
North
IncomingMixed Wood
SPUR CONVEYOR
7’
Roof SupportColumn
10’45o
4’
Shear Arm
Conveyor Layout: February 6, 2001
ControlRoom
Conveyor – Cross Section
Ta b le Ro lle r C o nve yo r Be lt C o nve yo rInc line d
Be lt C o nve yo r
Ro ll-o ff
12 ’
305’ 10’ 15’
3 ’
O
XRF De te c to r
La se rC o nve yo r, 5’ wid e
Laser-Induced Breakdown Spectroscopy (LIBS)
Pulsedlaser
Laser-inducedplasma
Atomicemissioncollection
Spectrometer Detector
Wavelength (nm)In
tens
ity205 210 215 220 225 230 235 240 245
Cd
Cd
Cd
Be
Line intensity providesspecies concentration
Line position providesspecies identification
Fiberoptic
LIBS spectrum of CCA-treated wood
0
2000
4000
6000
8000
10000
12000
14000
410 415 420 425 430 435 440
Em
issio
n I
nte
nsity
Wavelength (nm)
Calcium(422.67)
Chromium425.54427.48428.97
Weathered
LIBS-based sorting of CCA-treated wood
0
10
20
30
40
50
60
0 1 2 3 4 5 6 7
LIB
S C
hro
miu
m S
ign
al
Wood Sample
CCA-treated Wood
Untreated Wood
LIBS detector: Tasks and status
• Acquire laser and spectrometer components
• Interface spectrometer to the computer for data acquisition with external triggering
• Optical configuration design and design of detector package
• Construct prototype detector system
• Synchronize spectrometer data acquisition with firing of laser
• Construct timing delay circuit
Optical configuration: Lens design
laserbeam
laserbeam
longer, lessintense focus
shorter, moreintense focus
Optical configuration: Lens design
0
2
4
6
8
10
12
14
16
100 150 200 250 300 350 400
Inte
nsit
y (
mJ
/mm2 )
Distance from Lens (mm)
x2
x1
~6"Analysis Region
Spectrometer-computer interface
Plasma emission
Fiberoptic
Laptop computer
Spectrometer
Ext. trigger from laserData acquisition
and analysis
Instrument synchronization
Time0-16 us
Laser pulse (10 ns)
Plasma emission (25 us)
Chromium emission (10 us)
Detector