A:
All Dongding dryers come with a 12-month warranty covering parts and workmanship from the date of commissioning. Lifetime technical support and spare parts supply are provided.
Introduction of Pulverized Coal-Fired Hot Air Furnace
The newly developed pulverized coal-fired hot air furnace (Patent No.: ZL 2013 2 0644837.0)utilizes dry-process collected pulverized coal or pulverized coal obtained after coal washing as fuel. Compared with conventional coal-fired hot air furnaces, it offers significantly higher thermal efficiency, with fuel cost reduced by approximately 20%–30%, thereby achieving the objective of lowering coal-washing and processing costs.
Advantages of Pulverized Coal-Fired Hot Air Furnace
01
High Efficiency, Low Fuel Cost
High flame temperature and complete combustion without slag formation; fuel costs are about 15–20% lower than conventional coal-fired furnaces.
02
Simple Operation
A compact, easy-to-operate system with automatic fuel combustion control.
03
Low Maintenance
Reduced wear and low maintenance costs.
04
Better Environmental Performance
Reduced dust emissions and lower ash content minimize product contamination and increase yield.
05
Fully Automated
Convenient ignition reaches the required hot-air temperature within 10 minutes of start-up, with excellent compatibility with drying systems.
06
Environmentally Friendly
Low nitrogen oxides (NOx) and carbon monoxide (CO) emissions in the flue gas, with desulfurization efficiency up to 95%.
Working Principle of Pulverized Coal-Fired Hot Air Furnace
Coal preparation: Raw coal is crushed and ground into fine powder and stored for later use.
Auto ignition: First, the gas or oil igniter is started to raise the furnace temperature until coal is ready to catch fire.
Pulverized coal combustion: Primary air carries the coal powder and sprays it into the furnace. Secondary air enters in a swirl to mix with the powder. The coal burns in suspension, reaching a flame temperature of 1300–1500℃.
Heat exchange and hot air output: High-temperature flue gas passes through the heat exchange chamber and transfers heat to clean air, producing adjustable hot air at 100–300℃.
Flue gas discharge and dust removal: Cooled flue gas settles first, then goes through a dust collector and is discharged through the chimney.
Automatic control: Based on the hot air temperature, the system adjusts coal feed rate and air-to-fuel ratio automatically to ensure stable heating.
Specifications of Pulverized Coal-Fired Hot Air Furnace
Notice:
1. Any change of technical data shall not be advised additionally.
2. Parameters above are for reference; final configuration is tailored to your material and capacity.
Show of Pulverized Coal-Fired Hot Air Furnace
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Frequently Asked Questions
Common questions about our rotary dryers — pricing, customization, installation and after-sales.
A:
Please share your raw material, initial and target moisture content, required capacity (t/h), available fuel or heat source, and your target market. With these details our engineers can recommend the right model and send an accurate quotation.
A:
As a manufacturer, we accept orders starting from a single machine. We can also deliver complete drying production lines with auxiliary equipment such as hot air furnaces and dust collectors. Contact us for tailored pricing.
A:
Standard models are usually delivered within 25-40 days after the deposit. Customized machines or larger production lines may take longer depending on the configuration. The exact schedule is confirmed in your contract.
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Yes. Every dryer is engineered around your material, capacity, moisture and site layout. Heat source, material of construction, dust collection and automation level can all be customized to your process.
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Yes. We provide installation guidance, commissioning, operator training and lifetime after-sales support. Our engineers can also travel to your site, and all equipment comes with a warranty.
