Fertilizer Drying Hot Air Furnace — Thailand

Special Hot Air Furnace for Fertilizer Drying in Thailand

Meibao supplied a special hot air furnace for a fertilizer drying project in Thailand.

The furnace integrates fuel feeding, combustion, high-temperature gas purification, dust settlement, cold-air mixing and automatic temperature control. It supplies adjustable 100–700°C process hot air to downstream fertilizer drying equipment.

Fuel burns inside the combustion unit and generates high-temperature gas. The gas enters the high-temperature purification chamber after leaving the combustion section.

A small quantity of dust carried by the combustion gas agglomerates and settles inside the purification chamber. The purified hot air leaves the chamber at approximately 900°C.

Controlled cold air is introduced into the mixing chamber to adjust the process hot-air temperature to between 100°C and 700°C. The adjusted hot air is then delivered to the connected fertilizer drying equipment.

The hot-air temperature and heat supply are controlled according to the fertilizer drying process.

Coal or Biomass
→ Fuel-Feeding System
→ Combustion Unit
→ High-Temperature Combustion Gas
→ High-Temperature Purification Chamber
→ Dust Agglomeration and Settlement
→ Approximately 900°C Purified Hot Air
→ Controlled Cold-Air Mixing
→ 100–700°C Process Hot Air
→ Fertilizer Drying Equipment

1. Fuel Feeding

Coal or biomass is delivered to the combustion unit through the corresponding fuel-feeding system.

Fuel supply is coordinated with the required hot-air temperature and heat demand of the fertilizer drying process.

2. Fuel Combustion

The fuel burns inside the combustion unit and generates the high-temperature gas required for continuous drying.

The combustion system operates in coordination with the air-supply and temperature-control systems.

3. High-Temperature Purification

High-temperature gas enters the purification chamber after leaving the combustion section.

A small quantity of entrained dust agglomerates and settles inside the chamber, reducing particulate carryover before the hot air enters the mixing and drying sections.

4. Purified Hot-Air Output

The purified hot air leaves the high-temperature purification chamber at approximately 900°C.

The combustion and purification sections form an integrated direct-fired furnace system.

5. Cold-Air Mixing

A controlled quantity of cold air is introduced into the mixing chamber.

The cold air mixes with the purified high-temperature hot air to produce process hot air between 100°C and 700°C.

6. Fertilizer Drying

The adjusted hot air is transferred through the duct system to the connected fertilizer dryer.

The hot air provides the heat required to remove moisture from the fertilizer material during continuous production.

7. Temperature and Heat-Supply Control

The control system coordinates fuel feeding, combustion, air supply and process hot-air output.

Continuous hot-air temperature stability is maintained within ±5°C.

• Fuel-storage and feeding system
• Combustion unit
• Combustion chamber
• High-temperature gas outlet
• High-temperature purification chamber
• Dust-agglomeration and settling section
• Cold-air inlet
• Hot-air mixing chamber
• Air-supply fan
• Hot-air outlet and ductwork
• Temperature-monitoring instruments
• Automatic temperature-control system
• Electrical control cabinet
• Safety-interlock system
• Steel platform and inspection structure
• Fertilizer dryer connection

Designed for Fertilizer Drying

The combustion, purification and mixing systems are configured around the temperature and heat requirements of fertilizer drying equipment.

High-Temperature Purification

Entrained dust agglomerates and settles in the purification chamber before the hot air enters the drying system.

Wide Process-Temperature Range

The cold-air mixing system adjusts the process hot-air temperature between 100°C and 700°C.

Temperature Stability

The continuous hot-air supply maintains a temperature stability of ±5°C.

Direct-Fired Heat Utilization

After purification and temperature adjustment, the hot air is used directly in the fertilizer drying process. The furnace series is designed with a thermal efficiency above 95%.

Coal and Biomass Configurations

The furnace series can be configured for coal or biomass according to the selected fuel system.

The special hot air furnace series can be used for drying:

• Potash fertilizer
• Monoammonium phosphate
• Diammonium phosphate
• Compound fertilizer
• Other compatible chemical fertilizer products

It can be connected to:

• Rotary fertilizer dryers
• Drying kilns
• Spray-drying systems
• Fluidized-bed dryers
• Other fertilizer drying equipment

These applications describe the equipment series and do not indicate that the Thailand project produces every listed fertilizer product.

The Thailand project supplied a dedicated fertilizer-drying hot air system covering:

• Fuel feeding
• Combustion heat generation
• High-temperature purification
• Dust agglomeration and settlement
• Cold-air mixing
• Process hot-air temperature control
• Hot-air duct connection
• Connection with fertilizer drying equipment
• Installation and commissioning support

Meibao provides industrial heating and drying services covering:

Fertilizer drying-process design

Hot air furnace engineering

Coal and biomass combustion-system configuration

High-temperature purification design

Fertilizer dryer integration

Hot-air duct-system design

Temperature-control-system integration

Equipment manufacturing

Installation guidance

Commissioning support

Operator training

Overseas technical service

Contact Us

Planning a fertilizer drying project?

Send us your fertilizer type, production capacity, inlet and outlet moisture, required hot-air temperature, air volume, heat demand, fuel information, drying equipment and site conditions. Meibao will prepare the corresponding furnace and drying-system configuration.

Discuss Your Fertilizer Project