Industrial Air Flow Dryer Manufacturer

Use an air flow dryer only when the wet feed can be metered, dispersed and conveyed reliably in the heated gas stream. Paste-like, agglomerated or poorly dispersible feeds may require comparison with a spin flash route, while free-flowing granules may be better evaluated against fluid-bed drying. Confirm particle-size distribution, bulk density, feed consistency, initial and target moisture, stickiness, product-temperature limit, required throughput, gas velocity, collection method, dust and safety conditions, utilities and installation constraints before equipment selection.

Optimization

Griffin Technology has been continuously optimizing the airflow dryer.

The airflow dryer is mainly used in the drying of starch and the drying of some inorganic salt products, such as drying of sodium sulfate and sodium metabisulfite, which has always had its unique advantages.

In the feeding mechanism of the air dryer, We have designed a unique anti-arch device, which can ensure the smooth and smooth entry of the raw materials into the air stream dryer without the phenomenon of bridging.

In the main engine of the airflow dryer, a unique pulse link is designed. Some products have relatively high requirements for final moisture. In order to prolong the drying time in the airflow dryer, we have made a pulse expansion section, which will buffer the drying of the product. The speed makes more full contact with the hot air.

In the dust removal and collection process of the airflow dryer, considering a large amount of dust, we have made explosion venting devices in the bag filter and the host to achieve the purpose of safe production.

Actual Measurement Data of Material Suspension Speed

Raw Material Name	True Density (kg/m3)	Bulk Density (kg/m3)	Particle Size (mm)	Suspension Speed (m/s)
Wheat	1270～1490	650～810	4～4.5	9.8～11
Barley	1230～1300	600～700	3.5～4.2	8.7～10.5
Paddy	1020	550	3.58	7.5
Rice	1480	620～680	10×3	8～8.5
Corn	1240～1350	600～620	9×8×6	9.8～13.5
Soybean	1180～1220	560～720	3.5～10	10
Rapeseed	1040	640	1.3～2.2	7.6～8.8
Granulated Sugar	1580	720～880	0.51～1.5	8.7～12
Dry Fine Salt	2200	900～1300	＜1.0	9.8
Coarse Salt	1090	720	7～7.2	14.8～15.5
Flour	1410	610	0.163～0.197	1.5～2
Washing Powder	1270	480	＜0.5	2
Soda	2480	530	＜0.12	2.5
Talcum Powder	2600～2850	560～950	＞0.01	0.5～0.8
Clay	2200～2600	320～490	N/A	1.8～2.1
Zincite	4300	2280	N/A	17.7
4% Moisture Content Dry Sand	2300～2600	1410	50～100 Mesh	5.13～5.53
Molding Sand	2400	1020	50～100 Mesh	8.1～10
Ammonium Sulfate	1770	995	1.5	10.1～13.1
Phosphate Rock Powder	2580	1467	＜3.2	4.1～11.2
Polypropylene Pellets	900	460	2～3	6.2～6.9
Coal	1000～1700	720～940	1～3	4～5.3
Coal	1000～1700	720～940	3～5	4.2～6.8
Coal	1000～1700	720～940	5～7	6～10.2
Coal	1000～1700	720～940	10～15	11～13.3

Potato Starch Airflow Drying Solution

Customer's Material & Related Parameters
Material	Potato Starch
Capacity Requirement	≧100kg/h
Initial Moisture	60% (wet basis)
Final Moisture	≤10% (dry basis)
Raw Material Specific Gravity	Stacking specific gravity 0.7
Feed Temperature	Normal temperature
Discharge Temperature	50℃
Heat Source	Natural gas hot air furnace
Equipment Process Conditions
Receiving Method	Cyclone + bag dust collector
Air Flow Dryer Model	QG-350 *1
Feeding Method	Screw conveyor
Hot Air Contact Mode	Parallel flow
Inlet Air Temperature	160℃
Outlet Air Temperature	60℃
Material Requirements	Product contact 304 stainless steel
Dust Removal Method	Cyclone + bag dust collector
Installation Site	Indoor
Installation Site Size	Plant condition drawing is required
Noise	＜80 db
Public Works Conditions
Atmospheric Pressure	101.3KPa
Ambient Temperature	10℃
Relative Humidity	70%
Electric Power	380V, 3 phase, 50HZ
Machine Power	30KW/unit
Compressed Air Consumption	1.1m³/min
Compressed Air Pressure	0.3~0.6mpa

Air Flow Dryer Configuration List
ID	Name	Models & Specifications	Material	Quantity
1. Feeding System
1	Screw Feeder	LJ-108	SUS304	1
2	Feeding Pipeline	108 Casing Spiral	SUS304	1
3	Arch Breaker System	18mm round steel	SUS304	1
2. Drying medium circulation system
1	Air Blower	4-72-4.5A	Q235	1
2	Induced Draft Fan	9-26-6.3A	Q235	1
3	Hot Air Duct	Inner δ=2mm Outer δ=1.5mm	SUS304	1
4	Powder Discharge Air Duct	δ=3mm	SUS304	1
5	Pipe Connection	Flange type	Q235	1
3. Air Heating & Purification System
1	Ⅰ & Ⅱ Efficiency Air Filter	2000X1500X500	Q236	1
2	Direct-fired Gas-fired Hot Air Furnace	13X104kcal	301S	1
4. Drying System
1	Main Pipeline	D290mm	SUS304	1
2	Pulse Tube	D380mm	SUS304	1
3	Main Machine Skeleton		Q235+SUS304	1
5. Material Collection System
1	One-stage Cyclone Separator	XF750, straight section δ=4mm, Tapered section δ=3mm	SUS304	1
2	Air Hammer	SK-60	Cast aluminum	2
3	Continuous Discharge Valve	8L	SUS304	1
4	Bag dust collector	MCBD-64	SUS304	1
5	Solenoid Valve			8
6. Control System
1	Control Cabinet		Carbon steel spraying	1
2	Temperature Module		Siemens	1
3	Contactor Components		Siemens	1
4	Inverter		Siemens	2

PNEUMATIC DRYING

How Air Flow Drying Transports and Dries Solids

Suitable wet solids are metered into a hot gas stream, dispersed and conveyed through the drying path. Heat and mass transfer occur while the particles travel with the gas, after which the dried product is separated in the selected collection system. Feeding, gas velocity, duct geometry and separation must be engineered together.

1. Meter and Disperse Feed

The feeder and any deagglomeration device are selected from wet-feed flow, stickiness and particle condition.

2. Convey in Heated Gas

Gas flow and temperature provide transport and drying conditions for the expected particle distribution.

3. Control Residence Profile

Duct length, diameter, expansion sections and airflow affect contact time and particle movement.

4. Separate and Collect Product

Cyclone and filtration stages are selected from particle size, loading, recovery, emissions and dust-safety requirements.

ENGINEERING SELECTION

Air Flow Dryer Selection Requirements

Particle and Feed Data

Wet-feed form, particle size distribution, true and bulk density, stickiness, agglomeration and feeding behavior.

Transport Conditions

Suspension or conveying velocity, gas volume, pressure drop, residence profile and acceptable product carryover.

Thermal Duty

Feed rate, initial and target moisture, temperature limit, heat source and inlet or outlet conditions to be confirmed.

Collection and Safety

Particle recovery, exhaust treatment, dust hazard assessment, protection philosophy, construction materials and site utilities.

Request an Air Flow Drying Review

Send particle, moisture, capacity, heat-source and dust-handling data for an application-specific review.

Send Pneumatic Drying Data

TECHNICAL QUESTIONS

Air Flow Dryer FAQs

What materials can be evaluated in an air flow dryer?

Air flow drying can be evaluated for suitable dispersed powders, granules or deagglomerated wet solids that can be fed and transported in the gas stream. Particle size, density, moisture, stickiness, thermal sensitivity and suspension behavior must be reviewed.

Why is suspension velocity important in pneumatic drying?

Gas velocity must support the intended material transport and residence profile without unacceptable dropout, carryover or equipment loading. Published suspension-speed data are references; actual wet-feed behavior and particle distribution require application-specific confirmation.

How is an air flow dryer different from a spin flash dryer?

An air flow dryer primarily dries suitable dispersed solids while conveying them through a duct. A spin flash dryer adds mechanical agitation or dispersion and classification in a chamber, which can help with some pastes or filter cakes. Feed condition determines which route should be evaluated.

What information is needed for an air flow dryer proposal?

Provide material name, wet-feed form, particle size distribution, true and bulk density, feed rate, initial and target moisture, temperature limit, suspension or conveying behavior, heat source, collection requirements, dust hazard data, utilities and installation country.