Thermal In Situ Technologies - case study CVOC in LNAPL

SARCLE 2013, AMSTERDAM OCT 21-24
CLIQUEZ ET MODIFIEZ LE TITRE
- TPS TECH thermal in situ technologies
- Case: Treatment of CVOC in LNAPL
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CLIQUEZ ET MODIFIEZ LE TITRE
TPS TECHNOLOGIES SA
Agenda
TPS TECH – Who are we?
Gas Thermal Remediation (GTR)
Case: FORD Motors
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CLIQUEZ ET MODIFIEZ LE TITRE
TPS TECHNOLOGIES SA
Agenda
TPS TECH – Who are we?
Gas Thermal Remediation (GTR)
Case: FORD Motors
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TPS TECH - In Situ Thermal Desorption
+ Technology provider
-
20 -plus years experience
- > 8 millions tons treated by thermal desorption
• Conventional: rotating kiln technology
• Mobile
- Own technology development - Innovation!
- GTR (Gas Thermal Remediation)
- C-3
- Worldwide patents
+ Many international partners
- Remediation contractors using TPS technologies
www.tpstech.com
TPS TECH = TPS + GEO (since 2013)
TPS TECH
GEO inc
Thermal Desorption
Off-gas treatment
- Own patents: GTR
- Own patents: C3
- In-Situ
- In-Situ
Liquid  Gas
Gas  Liquid
Integral Solution to fully eliminate the pollution on location,
restoring land value at fixed costs...
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CLIQUEZ ET MODIFIEZ LE TITRE
TPS TECHNOLOGIES SA
Agenda
TPS TECH – Who are we?
Gas Thermal Remediation (GTR)
Case: FORD Motors
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GTR - Gas Thermal Remediation (in-situ)
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ISTD: principles - GTR
+ Phase 1: Heat the soil
- With in-situ heating elements (horizontal, vertical, oblique)
- By conduction
+ Phase 2: Treat contaminated gas
- C-3 technology (Compress – Cool – Condensate)
- Thermal oxidation (hydrocarbons)
• Reuse pollutants as fuel (hydrocarbons)
Maximum reuse of heat produced
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Phase 1: Heating the soil
burner
circulating
2 coaxial steel pipes
“Cold” air out (400° C)
Hot air in (700° C)
Heating the soil through conduction,
 contaminants vaporise
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Phase 2: Gas treatment: recycling
C-3 unit
Fresh air
Fuel
GTR©
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Compressing
Cooling
Condensing
Vapor extraction pipe
Polluted gases
OR: thermal oxidation
Supplementary fuel for the burner
C-3 unit
Fresh air
Fuel
GTR©
Vapor extraction pipe
Polluted gases
GTRTM (Gas Thermal Treatment)
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•
•
•
•
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Simple
Effective
Flexible
Easy to handle
Scalable
Affordable
Evolution: GTRTM
•
•
•
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No excavation
Flexible
Easy to handle
No nuisance for neighbours
(patent 2010)
Modularity - flexibility
NSR1
NSR1
NSR1
NSR1
NSR1
NSR1
Only heat what you need to treat
www.tpstech.com
Design
Cold point:
Center of triangle
Tube
Radius of
influence of the
tube
How do we know it is clean?
Target temperature of the soil achieved (during sufficient
time)
Indirect measurements (TPS):
CO extracted vapor
Direct measurements (soil
sampling by consultant)
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Treatable pollutants
+ Boiling point (patm)
+ Kinetic equation
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Evolution soil temperature
www.tpstech.com
BOFAS
Optimising energy use
Design with 1 burner per 2 tubes
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Phases in off-gas treatment
1. Separate water – chemicals (contaminants)
2. Compress the vapor
3. Cool the vapor
4. Condense the chemicals (contaminants)
5. Option: filter the final off-gas (adsorption)
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C3 Technology is a combination of compression, cooling, and condensation coupled
with proprietary regenerative adsorption
C-3 : >1,300,000 Gallons Recovered
Chlorinated Ethenes
PCE (Perchloroethene)
TCE (Trichloroethene)
Petroleum Hydrocarbons
DCE (Dichloroethene)
Fuels (gasoline, diesel, jet)
VC
Simple Aromatics (BTEX)
(Vinyl Chloride)
Chlorinated Ethanes
4-ethyltoluene
TCA (Trichloroethane)
Napthylene
DCM (Methelene Chloride)
CT
(Carbon Tetrachloride)
CF
(Chloroform)
CFCs (Freon 113)
GTR installed
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Vertical wells
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CLIQUEZ ET MODIFIEZ LE TITRE
TPS TECHNOLOGIES SA
Agenda
TPS TECH – Who are we?
Gas Thermal Remediation (GTR)
Case: FORD Motors
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Location (Bordeaux)
Degreasing
operation
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The site
+ 300 m2 contaminated, 4,5 m bgs
+ Sand, LNAPL of engine oil (2 m)
+ Contaminants: CVOC’s (PCE, TCE, DCE,...) in
LNAPL
+ Max concentration in oil: 145 mg/kg
+ Target: mass reduction of CVOC’s in oil: 99 %
+ Target soil temperature: 100º C
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Initial concentrations of CVOC’s in oil
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Liquid mixtures – Eutectic points & azeotropes
Compound
Boiling point (°C)
Co-distillation point
(°C)
(Eutectic point)
Tetrachloroéthene
121
88.5
1,1,2-Trichloroethane
113.7
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Trichloroethene
87.1
73.1
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Lab test: time effect on CVOC’s at 80ºC
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Lab test: temperature effect after 24 h
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Lab test showed:
•
A minimal temperature has to be reached to ensure the
distillation of CVOCs out of oils.
•
Undetectable low levels are reached rapidly (less than 24
hours à 100°C).
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During the in situ application, interactions may occur with the
soil matrix, shifting the optimal temperature a few degrees
higher.
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Conceptual model
Pump & Treat
LNAPL
Hydraulic barrier
Treat
Pump
Reinject
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Set-up Pilot test
+ Cover a representative
zone
+ Depth down to
groundwater
+ Target on codistillation CVOC
- 6 heating tubes
- 3 burners
- 7 vapour extraction
tubes
Ford Motors: Pilot with 3 burners tubes
Vapour treatment
Soil
Vapor treatment
Monitoring/Safety
Monitoring/Safety
Temperature
measurement
30 thermocouples
placed in soil and gas
lines:
Gas analysis
During all the period of treatment, the gases to be analyzed in the vapour and the exhaust stack
are:
HCl, (PCE), Oxygen (O2); Carbon monoxide (CO); Carbon dioxide (CO2); Nitrogen oxides (NOx);
The sulphur dioxide (SO2) and hydrocarbons HCT.
Alarms/Safety
•burner temperature (operation: stopping burner when temperature of gas after flame exceed the
limit temperature (e.g. 1100°C) and sends sms)
•Inlet fan temperature (operation: opening fresh air valve and sends sms)
•Electricity off (operation: send sms)
Soil temperature dvt
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Pilot: mass reduction of CVOC’s
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Results
+ Target temperature reached after 20 days heating
+ CVOC’s reduction: > 50 %
+ No harmful gases emitted
+ GTR proven as a safe technology
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– Pilot results – Pumping assays
Pumping 3tests
oil productivity
X7
X2
18 °C
28 °C
0,1 m3/h
0,74 m3/h
45 °C
1,5 m3/h
Optimization of pumping performances !
Full scale Installation
+ 280m² to treat 4,5 m
depth
+ 63 boreholes
+ 42 heating wells
+ 19 hexagonal grids –
2.2m interdistance
+ 19 SVE wells
+ 5 weeks project duration
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Installation (2)
+ Natural gas and electrical connection
+ Insulation
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Combustion gas and electrical network
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FORD Motors: distillation TCE from LNAPL
Monitoring
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Surveillance program
+ Ambiant air – daily
- VOC
- Explosivity
- O2
- CO
- H2S
+ Ambiant air – sampling
campaigns for VOC’s
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Results air (emissions)
Ambiant air
Exhaust air
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Results - Temperatures
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Results – COVC’s in Oil LNAPL
PZ-TD1
PZ-TD2
PZ-TD3
PZ-TD4
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CLIQUEZ ET MODIFIEZ LE TITRE
CONTENT
The case
Proposed solution
Lab study
Pilot
Full scale
Conclusions
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Conclusions and perspectives
+ ISTD proven as fractionned distillation technology
+ Initial characterization essential for accurate timing
estimate and planning
+ Cost efficient
TPS TECH International Licenses
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www.tpstech.com
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