DENSE-PHASE
CONVEYING SYSTEM
A positive-pressure conveying system that uses sealed pressure vessels and compressed air to move powders, granules and pellets as dense plugs or dunes at controlled low velocity. Twin-pot sequencing supports near-continuous transfer while helping protect product quality and reduce pipeline wear.
HOW THE PTS WORKS
FILL
Product enters the available pressure pot through an inlet isolation valve.
SEAL
The inlet closes and valve-position interlocks confirm a pressure-tight vessel.
PRESSURIZE
Controlled compressed air establishes the pressure needed for the route.
VENT & ALTERNATE
Air exits through the destination filter while the second pot prepares the next batch.
CONVEY
Material moves through the pipeline as dense plugs at controlled velocity.
WHY SELECT DENSE PHASE
Gentle product handling
Lower material velocity helps limit particle breakage, fines generation and blend segregation.
Reduced line wear
Controlled velocity can reduce wear at bends when handling abrasive or high-density products.
High solids loading
More product is carried per unit of gas compared with suspended-flo .
Dust- and gas-tight
Pressure-vessel feeding avoids leakage through a conventional low-pressure rotary feeder.
Flexible routing
One source can feed multiple destinations through pressure-rated diverter valves.
Process integration
PLC sequencing, weighing, inert gas, batch tracking and interlocks can be integrated.
SUITABLE APPLICATIONS
Fragile granules and pellets
Abrasive powders and minerals
Premixes prone to segregation
High-bulk-density materials
Food, pharma and chemical transfer
Reactor, blender and packing feeds
TWIN-PОТ ОPERATING CONCEPT
One pressure pot conveys while the other fills or prepares for the next cycle. PLC-controlled valves alternate the pots to provide stable, near-continuous material transfer.
ALTERNATING TWIN-POT SEQUENCE
CONTROL & SAFETY INTERLOCKS
Valve confirmation
Inlet, discharge and diverter positions are proven before each pressure step.
Pressure supervision
Pot and line pressure are monitored for fill, convey and depressurization states.
Destination permissive
Receiving-silo high level, vent-filter status and route selection are interlocked.
Air management
Pressure, flow and sequencing are adjusted to maintain stable plug movement.
Blockage response
High pressure or no-flow conditions initiate controlled stop and safe recovery logic.
Process safety
Relief protection, earthing, area classification and inerting are engineered as required.
STANDARD CAPACITY & PRELIMINARY SIZING
Screening guide for a free-flowing powder with bulk density 0.5 kg/L (500 kg/m3). Final sizing requires a route calculation and, where necessary, material testing.
CONTROL & SAFETY INTERLOCKS
- Twin-pot alternating duty
- Working fill: 70% per pot
- Free-flowing ambient powder
- Plug-flow target: 4-12 m/s
- Clean, dry compressed air
PRELIMINARY MODEL SELECTION
|
STANDARD MODEL
|
POT VOLUME EACH
|
USEFUL BATCH PER POT
|
INDICATIVE TWIN-POT CAРACITY BAND
|
PRELIMINARY PIPE SIZE
|
TYPICAL DUTY
|
|---|---|---|---|---|---|
|
DP-2x100
|
2 x 100 L
|
35 kg
|
0.3-0.8 t/hr
|
0-50 NB
|
Small batch
|
|
DP-2x250
|
2 x 250 L
|
88 kg
|
0.8-2.0 t/hr
|
50-65 NB
|
Process feed
|
|
DP-2x500
|
2 x 500 L
|
175 kg
|
1.5-4.0 t/hr
|
65-80 NB
|
General duty
|
|
DP-2x750
|
2 x 750 L
|
263 kg
|
2.5-6.0 t/hr
|
80-100 NB
|
Medium duty
|
|
DP-2x1000
|
2 x 1,000 L
|
350 kg
|
Up to 2,500 kg/hr
|
80-100 NB
|
High duty
|
|
DP-2x1500
|
2 x 1.500L
|
525 kg
|
5.0-12.0 t/hr
|
100-125 NB
|
Bulk transfe
|
DENSE PHASE VS OTHER CONVEYING MODES
|
CRITERION
|
PTS/VACUUM BATCH
|
DENSE PHASE
|
LEAN PHASE
|
|---|---|---|---|
|
Driving force
|
Negative pressure
|
Positive pressure
|
Positive or negative pressure
|
|
Material movement
|
Airborne batch to receiver
|
Dense plugs or dunes
|
Suspended in air stream
|
|
Typical velocity
|
Application-specific
|
Approx. 4-12 m/s
|
Approx. 15-35 m/s
|
|
Best fit
|
Contained short/medium transfer
|
Fragile, abrasive or segregating material
|
Simple, flexible general transfer
|
|
Primary equipment
|
Vacuum receiver and filter
|
Pressure pot, air receiver and controls
|
Blower/compressor and feeder
|
Need the Right DENSE-PHASE CONVEYING SYSTEM
for Your Process?
Our engineers will help you select, size and configure the ideal system for your application.
+918484041703
sales@adritis.com
www.adritis.com
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