”serving the pulp and paper industry for over 35 years”
TRANSCRIPT
”Serving the pulp and paper industry for over 35 years”
JWH Pelletaire™
Aeration System
”Serving the pulp and paper industry for over 35 years”
Pellet Heat Generation
Two mechanisms are at work:1) As oven-dried wood/biomass reabsorbs moisture. The moisture in gas phase condenses into liquid phase generates heat. The amount of heat is related to the starting moisture content. When critical moisture is achieved through the pellet, equilibrium is achieved and the reaction which is generating the heat is stopped. That equilibrium moisture content will depend on the relative humidity (commonly between 5-15%). The total amount and rate of the release will depend on the initial moisture content and the properties of the pellets (type and radial density profile).
2) A second reaction which is independent of moisture is oxidation. In this case, the unsaturated wood extractives react in the presence of air (oxygen) and give off heat. The amount of heat will depend on the amount and type of wood extractives, which in turn are related to species and the part of the tree being used (pine vs. hardwood, heartwood vs. sapwood, wood vs. bark or needles). The rate of these reactions will increase with increasing temperature, which can lead to a rapid temperature rise.
Thus, there is the potential of two distinct reactions going on in a pile of southern pine wood pellets, both of which generate heat.
In both cases aerating a large pile of pellets will cool the pile and remove CO and VOC generated by both self-heating mechanisms, and thus is positive.
Reference:Dr. Stephen KelleyNorth Carolina State UniversityPulp and Paper FoundationRaleigh, NC
”Serving the pulp and paper industry for over 35 years”
Temperature Comparison
Can not load in Ship’s Hull
Without Pelletaire™
With Pelletaire™
”Serving the pulp and paper industry for over 35 years”
Warehouse In-floor Pelletaire™
Two Zones
Roof Ventilator Assemblies
Zone TwoFan Assembly
Zone OneFan Assembly
In Floor Diffusers
”Serving the pulp and paper industry for over 35 years”
Dome In-floor Pelletaire™
Four Zones
Roof Ventilator Assemblies(Number and location will vary)
”Serving the pulp and paper industry for over 35 years”
Dome In-floor Pelletaire™
Diffuser Connections
”Serving the pulp and paper industry for over 35 years”
In-floor Pelletaire™
Zone Air Flow
”Serving the pulp and paper industry for over 35 years”
Dome In-floor Pelletaire™
Tapered Underground Air Supply
”Serving the pulp and paper industry for over 35 years”
In-Floor Pelletaire™ Diffuser
UndergroundAir Supply Pipe
Each Diffuser24” wide x 108” Long
”Serving the pulp and paper industry for over 35 years”
Pelletaire™ Diffuser Details
Perforated PlateGalvanized
24” wide x 36” Long‘welded to bar grate’
Tapered Pelletaire™ Housing18” Wide x 108” Long
Bar GrateGalvanized
24” Wide x 36” Long
Concrete Floor
Underground Air Supply Pipe
”Serving the pulp and paper industry for over 35 years”
Pelletaire™ Fan Assembly
Features:
•Radial Curved Back plate Wheel
•Above 85% Fan Efficiency
•Premium Efficiency TEFC Motor
•Heave Gauge Housing continuous weld
”Serving the pulp and paper industry for over 35 years”
Dust Collection Option
Exhaust Hood(s)(Number and location
may change)“Firefly” Spark Detection
and Extinguisher
“TD”Dust Collector
OptionalSteel Building
Exhaust FanAssembly
”Serving the pulp and paper industry for over 35 years”
“TD” Dust Collection Option
Dust Fan Assembly
Dust Sleeves
Dust Containers
Firefly Spark Detection and Distinguishing location
(Not Shown)
”Serving the pulp and paper industry for over 35 years”
Thank You