Pure hot blast stove

Indirect type pure hot air furnace

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

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 air furnace, as a new type of heat source equipment, can replace steam heat exchangers, heat transfer oil heat exchangers, and air electric heaters. It has the advantages of small size, convenient installation and transportation, and low energy consumption. It can be widely used 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 configurations. The vertical coal-fired (biomass pellet) hot blast stove, depending on customer requirements, is further classified into manually operated and mechanically operated types. It consists of two main components: the combustion chamber and the heat exchanger. The high-temperature flue gas generated in the combustion chamber enters the heat exchanger, where it exchanges heat with the cold air blown in by a blower in a countercurrent manner through radiation and convection for several passes. After being heated to a certain temperature, the cold air is discharged through the hot blast outlet of the hot blast stove to the heat-using equipment. The flue gas is extracted by a smoke extractor, passes through a smoke separator and dust collector, and is then vented.

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

feature

Pure and uncontaminated: The separation of hot air and combustion products ensures that the material is not contaminated.

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 adjusted through the 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.