Fluidized Bed Concentrator

49 Pages·2014·3.37 MB·English

Fluidized Bed Concentrator
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1) Introduction of Technology
2) Running/Maintenance of Equipment
Fluidized Bed VOC Abatement System
Paint Spraybooth
VOC Abatement
Historyy
• Gen. 1:
FFiixedd bbedds off acttiivattedd carbbon + TThhermall // CCatallytiic OOxiiddatiion
• Gen. 2:
Carbon/Zeolite Rotor Wheels + Thermal / Catalytic Oxidation
•• GGeenn. 33::
Regenerative Thermal Oxidizers
(With high level booth recirculation)
• Gen. 4:
Fluidized Carbon Bed + Thermal/Catalytic Oxidation
or Solvent Reclamation
Issues with Older
Approaches
Fixed Bed Systems
• Expensive, Large and Heavy
• Potential for Bed Fires
Carbon Rotors
• Expensive replacement of rotors and long delivery of rotors
• Limited Concentration Ratios 10:1
• Potential for Rotor fires
– (Ash-bearing carbon and potential for catalyzing which can self-ignite)
RTOs
• Expensive, Large and Heavy
• Maintenance Issues (Beds plugging, Valve repair)
• CCoossttllyy ttoo ooppeerraattee::
– High electrical usage
– High gas usage (under certain inlet conditions)
Fluidized Bed System
Features
• Minimized purchase price
• MMiiniimiizedd operattiing costt
• Minimized energy use
• Minimized secondary pollutants (CO2)
• Minimized size and weight
• Safest (no carbon fires)
Fluidized Bed
Flow Schematic
Clean Carbon
to Adsorber 50% Max LEL
30-40% Target
LEL
CClleeaann EExxhhaauusstt
CClleeaann EExxhhaauusstt
Spent Carbon T HTL
to Desorber
Thermal
Oxidizer
DesorberDuct
P
to Thermal Oxidizer
T
P
Clean
LEL Monitor
Exhaust
TT PP
H/X
L
L
Process Fan Fresh
L Air
FFiilltteerr TT
& Fluidized Bed Fluidized BHeodt gas from Thermal Oxidizer
P Thermal Oxidizer
Dehumidification Adsorber Desorber
EPA and Control (Data Log)
PP
From Paint Booth Startup Blower
Safety
Monitoring and Control
Carbon Transfer Blower
Carbon Transfer Blower
Process: Adsorption
Clean Carbon • BAC is supplied from the top of
to Adsorber
adsorber, it falls down sequentially.
CClleeaann EExxhhaauusstt
• Exhaust gas flows upwards from
under adsorber, it agitates and
Spent Carbon
sufficiently contacts falling BAC.
to Desorber
• BBAACC addsorbbs VVOOCC andd a cllean
exhaust gas is discharged to
atmosphere.
•• SSppeenntt BBAACC iiss aaiirrlliifftteedd ttoo DDeessoorrbbeerr bbyy
blower.
• Inlet conditions:
Process Fan
• BBeellooww 110055 FF aanndd 6600%% RRHH
Fluidized Bed
Adsorber
Carbon Transfer Blower
Fluidized Bed
3D drawings & Actual
Fluidized Bed
3D drawings & Actual