Pure hot blast stove

Indirect pure hot air furnace

The GRL series hot-blast stove is a new type of high-efficiency and energy-saving heat exchanger developed by our factory. It uses coal, biomass, gas, and oil as fuels and outputs pure and pollution-free hot air through radiant heat transfer, conductive heat transfer, and convective heat transfer. The pure hot-blast stove designed and manufactured by our company has obtained national patents.

Due to the optimization measures and structure adopted in this series of hot blast stoves, the heat transfer and exchange effects have been enhanced, resulting in a high comprehensive heat exchange coefficient, fast temperature rise, and large reserve energy of the entire machine.

The GRL series hot-blast stove, as a new type of heat source equipment, can replace steam heat exchangers, heat transfer oil heat exchangers, and air electric heaters. It boasts advantages such as small size, convenient installation and transportation, and low energy consumption. It can be widely applied in various workplaces such as drying, heating, insulation, and dehumidification. When paired with drying equipment such as cyclone flash dryers, pressure spray dryers, and vibrating fluidized bed dryers, it can maximize the efficiency of the equipment.

The following is its core information:

Working Principle:

The GRL series hot blast stove is available in both vertical and horizontal forms. The vertical coal-fired (biomass pellet) hot blast stove, depending on customer requirements, is further divided into manually fired stoves and mechanically fired stoves. It consists of two parts: the combustion chamber and the heat exchanger. The high-temperature flue gas generated in the combustion chamber enters the heat exchanger and exchanges heat with the cold air blown in by the blower in several passes through radiation and convection counterflow. After being heated to a certain temperature, the cold air is discharged to the heat-using equipment through the hot blast outlet of the hot blast stove. The flue gas is extracted by a smoke extractor and is discharged after being cleaned by a flue gas separator and dust collector.

The hot air does not come into direct contact with the material, thus avoiding smoke pollution. It is suitable for materials that have high requirements for whiteness and purity.

feature

Purity and Pollution-Free: The separation of hot air from combustion products ensures that the material remains uncontaminated.

High efficiency and energy saving: Large heat exchange area, high heat conversion rate, and thermal efficiency of some models can reach over 85%.

Temperature controllable: The hot air temperature is precisely regulated through a PLC intelligent control system, with an output range of 100-450℃.

Special note: Our company's equipment features a multi-layered sleeve-type pure metal structure (excluding refractory materials, thus avoiding issues such as cracking and detachment caused by thermal expansion and contraction due to different material expansion coefficients in traditional equipment). Each air layer sleeve is densely packed with metal fins, maximizing heat exchange efficiency. The material in the high-temperature zone is high-temperature resistant stainless steel (310S), ensuring a long service life.

Application field

Food industry: drying of milk powder, bread, biscuits, etc.

Pharmaceutical and Chemical Industry: Drying of pharmaceuticals, synthetic resins, etc.

Other fields: grain drying, wood processing, industrial heating, etc.

Strengths and Weaknesses

Advantages: High-quality materials produced, wide range of applications, and excellent environmental performance.

Disadvantage: The equipment cost is relatively high.

Selection Recommendation

Select the appropriate type based on the material characteristics (such as requirements for whiteness, impurities, and contamination).

Considering the types of fuel (coal, gas, etc.) and thermal efficiency, gas-fired models are cleaner but more expensive.

Pay attention to the material and structure of the heat exchanger to ensure long-term stable operation.