Product Description:

High-temperature hot air furnaces are mainly used in the deep processing of inorganic salts and non-metallic mineral products. They are now widely applied in the powder engineering of products like silica, calcium carbonate, kaolin, bentonite, and chemical pigments, and can be matched with various dryers. The furnaces primarily use low-calorific-value coal as a heat source, generating hot flue gases of about 850 degrees through combustion, which are then heat-exchanged to produce hot air of about 500 degrees for subsequent drying equipment. Technical features: relatively stable combustion temperature, adjustable hot air temperature, low resistance in the furnace and heat exchanger, long service life, suitable for continuous operation.

High-temperature gas hot air furnaces are divided into two types according to their working principle: regenerative and heat-exchange.

One: Storage-type hot air stove

Internally, the unit utilizes grid bricks or heat storage balls. After heating the grid bricks or heat storage balls, fresh cold air is used to reverse吹, transforming it into hot air. This hot air is then utilized. Simultaneously, heat storage in another hot air furnace is heated. When the heat storage temperature in one hot air furnace drops to a level where it cannot meet the required temperature, and the second hot air furnace has reached the desired temperature, the cold air is switched to the second furnace, utilizing its heat. Typically, it requires switching between three identical hot air furnaces to achieve a continuous cycle. Most smelting processes now use such hot air furnaces.

Advantages of Storage-type Hot Air Furnace

High heat exchange temperature

2. High thermal efficiency

Disadvantages of a regenerative thermal oxidizer

Large volume

2. Large battle area

3. Unstable hot air temperature

4. Many switches, prone to issues

5. Short thermal storage life

High maintenance costs

7. High procurement cost

Two, Heat Exchange Type Hot Air Furnace

Regenerative thermal wind furnace, utilizing a high-temperature-resistant heat exchanger as the core component. This part cannot use a metallic material heat exchanger; only a high-temperature-resistant ceramic heat exchanger is permitted. The coke oven gas is fully combusted in the combustion chamber, and the hot air after combustion passes through the heat exchanger, transferring heat to the fresh cold air, thereby raising the temperature of the fresh air to above 1000 degrees Celsius. This type of thermal wind furnace is expected to be widely used in the future.

Advantages of Heat Exchanger Hot Air Furnace

High heat exchange temperature

2. High thermal efficiency

3. Compact size

4. Stable hot air temperature

5. No changeover mechanism

6. Long-lasting

7. High maintenance costs

8. Low purchase cost

Shortcomings of heat exchanger hot air furnace

1. The heat exchange temperature is not as high as that of a heat storage type.

2. Introduced later and not widely adopted