KJG Series
KJG Hollow Blade Dryer
Self-cleaning wedge-shaped hollow blade (paddle) dryer for indirect heating, cooling, and low-temperature calcination.
- Self-cleaning wedge-shaped stirring blades
- Compatible with steam, hot water, or thermal oil
- Sealed covers limit dust and vapor leakage
- Closed-loop operation for solvent-recovery materials
Drying Equipment13
Standard Models
-40 to 320°C
Heat Medium Range
~1.22 kg
Steam per kg Water Evaporated
Specifications
Technical parameters
KJG-2.7 to KJG-41
| Model | Heat Transfer Area (m²) | Effective Volume (m³) | Rotation Speed (rpm) | Power (kW) | Body Width A (mm) | Total Width B (mm) | Total Height C (mm) | Total Length O (mm) |
|---|---|---|---|---|---|---|---|---|
| KJG-2.7 | 2.7 | 0.06 | 15-30 | 2.2 | 306 | 736 | 762 | 1956 |
| KJG-9 | 9 | 0.32 | 10-25 | 3.8 | 584 | 841 | 864 | 2820 |
| KJG-13 | 13 | 0.59 | 10-25 | 5.5 | 762 | 1000 | 1092 | 3048 |
| KJG-18 | 18 | 1.09 | 10-20 | 7.5 | 940 | 1470 | 1270 | 3328 |
| KJG-24 | 24 | 1.53 | 10-20 | 11 | 1118 | 1700 | 1470 | 3540 |
| KJG-29 | 29 | 1.85 | 10-20 | 11 | 1270 | 1700 | 1470 | 4114 |
| KJG-36 | 36 | 2.42 | 10-20 | 15 | 1270 | 1820 | 1524 | 4724 |
| KJG-41 | 41 | 2.8 | 10-20 | 15 | 1296 | 1676 | 1778 | 4724 |
KJG-52 to KJG-110
| Model | Heat Transfer Area (m²) | Effective Volume (m³) | Rotation Speed (rpm) | Power (kW) | Total Width B (mm) | Total Length O (mm) |
|---|---|---|---|---|---|---|
| KJG-52 | 52 | 3.96 | 10-20 | 30 | 1700 | 5842 |
| KJG-62 | 62 | 4.79 | 10-20 | 30 | 1800 | 5842 |
| KJG-81 | 81 | 6.09 | 5-15 | 45 | 1800 | 5637 |
| KJG-95 | 95 | 7.39 | 5-15 | 55 | 2032 | 9119 |
| KJG-110 | 110 | 8.9 | 5-10 | 90 | 2438 | 6122 |
Parameters vary with different materials; subject to final design.
Related equipment
ZPG SeriesDrying Equipment
ZPG Vacuum Rake Dryer
Horizontal batch vacuum dryer with a scraper-blade rake for pastes, paste-like, and powdery materials.
View specifications
HG SeriesDrying Equipment
HG Rotary Drum Scraper Dryer
Internal-heating rotary drum dryer that films, dries, and scrapes viscous and paste-like materials in seconds.
View specifications
PLG SeriesDrying Equipment
PLG Continual Plate Dryer
Conduction-type continuous multi-plate dryer with atmospheric, closed, and vacuum configurations for large drying areas in a small footprint.
View specificationsEngineering Advantages
Built for demanding vacuum drying duty
Large Heat Transfer Area
Hollow wedge-shaped blades densely arranged on the stirring shaft give a very large effective heat transfer area per unit volume, shortening processing time.
Self-Cleaning Wedge Blades
Relative movement between material particles and wedge-shaped blades creates a scrubbing effect that keeps the heat transfer surface clean during operation.
Low Energy Consumption
Indirect heating uses approximately 1.22 kg of steam per kg of water evaporated, well below open-air drying methods.
Minimal Carrier Air and Dust
Indirect conduction heating means no large volume of carrier air is needed, reducing dust entrainment and heat loss through exhaust.
Low Operating Cost
Low rotation speed, a reasonable structural design, and low wear on the wedge blades keep maintenance and operating costs down.
Stable Compression-Expansion Stirring
Wedge-blade compression-expansion stirring keeps every particle in uniform contact with the heat transfer surface for consistent results.
Wide Temperature Range
Heat medium temperature spans -40°C to 320°C, supporting drying, cooling, heating, sterilization, reaction, and low-temperature calcination.
Sealed Covers
Sealed covers over the W-shaped body prevent dust leakage and collect vapor for controlled discharge or recovery.
W-Shaped Multi-Shaft Body
The dryer body is W-shaped with 2-4 hollow stirring shafts, and a weir-plate discharge gate keeps the heat transfer area consistently covered.
Working Principle
The vacuum rake drying cycle
- STEP 01
Charge Material
Paste, granular, powdery, or paste-like material enters the W-shaped trough and is held at a level set by the weir-plate discharge gate.
- STEP 02
Heat Medium Circulation
Steam, hot water, or thermal oil flows through the hollow shaft and into the wedge-shaped blades, conducting heat directly into the material bed.
- STEP 03
Wedge Blade Agitation
Rotating wedge blades compress and expand the material, continuously scrubbing the heat transfer surface clean while mixing the bed.
- STEP 04
Vapor Collection
Sealed covers over the trough contain dust and collect evaporated moisture for controlled venting or recovery.
- STEP 05
Discharge Product
The weir-plate gate releases processed material once the target moisture or temperature condition is reached.
Structure Diagram
Inside the KJG hollow blade dryer
Side view showing overall length D/C, base length E, and shaft centerline height F/G, with the twin hollow stirring shafts visible through the trough; end view (right) showing body width A and base width B.
Key Components
- Twin Hollow Shafts
- W-Shaped Trough
- Overall Dimensions
Application Industries
Industries relying on the ZPG series
Environmental Protection
- Sludge and filter cake volume reduction
- Closed-loop drying for odorous byproducts
- Low carrier-air design limits fugitive emissions
Chemical & Pharmaceutical
- Indirect heating for heat-sensitive intermediates
- Solvent-recovery compatible closed-loop operation
- Low-temperature calcination and reaction processing
Confirm documentation requirements with our engineers before specifying for regulated production.
Food Processing
- Continuous or batch drying of food powders and granules
- Steam, hot water, or thermal oil heat sources
- Gentle indirect heating for temperature-sensitive ingredients
Why Choose Ruibo
Reasons processors specify Ruibo
Large Heat Transfer per Unit Volume
Densely arranged wedge blades pack a large heat transfer area into a compact footprint, shortening processing time versus open dryers.
Self-Cleaning Operation
The wedge-blade scrubbing action keeps the heat transfer surface clean continuously, reducing manual cleaning downtime.
Low Wear, Low Cost
Low rotation speed and a robust structural design keep component wear and operating cost down over long duty cycles.
Wide Heat Medium Range
A -40°C to 320°C heat medium range covers drying, cooling, heating, sterilization, reaction, and low-temperature calcination in one platform.
Low Dust and Emissions
Sealed covers and minimal carrier air reduce dust entrainment, supporting closed-loop operation for solvent-recovery materials.
Thirteen Standard Sizes
Heat transfer areas from 2.7 m² to 110 m² across thirteen standard models make it straightforward to match capacity to throughput.
Materials Handled
FAQ
Common questions about the ZPG series
Request a Quote
Get KJG Hollow Blade Dryer pricing and a technical proposal
Share your material and process requirements and our sales engineers will size the correct model, confirm delivery, and prepare a formal quotation.