RFL-100 Hot Air Furnace Project for an Agricultural Product Drying Company in Lam Dong Province, Vietnam

Project Overview

Lam Dong Province, Vietnam, is a major agricultural production and processing hub in Southeast Asia, renowned for its high-value-added crops such as traditional Chinese medicinal herbs, fruits, vegetables, and mushrooms. A local agricultural processing enterprise specializes in the large-scale drying and processing of fruits, vegetables, mushrooms, and traditional Chinese medicinal herbs, exporting its products to China, Japan, South Korea, and markets in Europe and the United States. The company’s existing drying equipment suffered from issues such as poor temperature control accuracy, insufficient hot air purity, and high energy consumption. These problems resulted in uneven coloration of the finished products and significant fluctuations in moisture content, making it difficult to meet the strict standards of international buyers. To improve product quality and production capacity, the company conducted extensive research and ultimately chose to partner with Huano Boiler to introduce an RFL-100 hot air furnace to complement its drying production line.

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Solution

Based on the company’s drying process requirements for multiple product varieties and batches, Huano Boiler’s technical team configured an RFL-100 hot-air furnace and paired it with an intelligent drying production line:

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Precise Temperature Control with Adaptive Multi-Stage Drying Curves

The RFL-100 hot air furnace is equipped with an intelligent temperature control system that precisely adjusts hot air temperature and airflow based on the drying characteristics of different materials—such as traditional Chinese medicinal herbs, fruits, vegetables, and mushrooms. Temperature fluctuations are kept within an extremely narrow range, ensuring uniform and consistent drying, resulting in finished products with natural color and stable moisture content.

Clean drying, ensuring food-grade quality

The split-type heat exchange structure completely isolates flue gas from the hot air, ensuring the output hot air is clean and free of contamination. This eliminates secondary contamination of materials by soot and harmful gases, fully meeting food-grade and pharmaceutical-grade drying hygiene standards.

Energy-efficient and high-performance, significantly reducing operating costs

The optimized furnace structure and heat exchange efficiency result in high fuel utilization. Compared to traditional hot-air furnaces, energy consumption is significantly reduced for the same production capacity. Combined with fully automatic load adjustment, which prevents waste from idle operation, overall operating costs are markedly reduced.

Stable and Reliable, Suitable for Continuous Production

The equipment features a compact design and simple operation, enabling 24-hour continuous and stable operation to fully meet the high-volume drying demands during peak harvest seasons for agricultural products.

Core Project Advantages

Significantly improved quality of dried products, with uniform color, good rehydration properties, and a markedly higher export compliance rate.

Clean, pollution-free hot air ensures successful passage of international customer quality audits, enhancing market competitiveness.

Energy consumption is significantly lower than that of previous equipment, resulting in substantial fuel cost savings and full utilization of production capacity during peak seasons.

Intelligent control reduces reliance on manual labor; operator training is simple, and operation and maintenance are convenient.

Client Testimonial

“Our production process requires a long-term, stable supply of hot air, and we also need equipment that can adapt to varying local fuel conditions. Huanuo Boiler provided a comprehensive hot air system solution tailored to our production needs. The equipment aligns well with our production line requirements in terms of hot air temperature control, fuel configuration, and automated operation.”

Mike

Corporate Project Manager

“Huanuo’s SZS series steam boiler has performed very stably on our continuous paper production line. The steam pressure fluctuation is minimal, fully meeting the high-quality steam requirements of the drying cylinders. After more than a year of operation, it has maintained high thermal efficiency and a low failure rate—one of the most reliable pieces of equipment on our line.”

Budi Santoso.

Equipment Manager, a major paper group in Indonesia

“Pharmaceutical processes have extremely high requirements for steam cleanliness and temperature control. Huanuo’s electric steam boiler produces clean steam with no on-site emissions and provides precise temperature control. It helped us smoothly pass several international quality system audits. It is a boiler that truly understands the needs of the pharmaceutical industry.”

María González.

Production Director, a pharmaceutical company in Mexico

“Our hotels have very high requirements for the quietness and safety of hot water supply. Huanuo’s vacuum hot water boiler operates very quietly and maintains a stable water temperature—guests hardly notice the equipment is there. Since the upgrade, hot water complaints have dropped significantly, and management has become much easier.”

Ahmed Hassan.

Head of Engineering, a hotel group in Egypt

“The stenter machines in our dyeing and finishing process are very sensitive to thermal oil temperature stability. Huanuo’s thermal oil heater heats up quickly with minimal temperature fluctuation, and the finishing effect has improved noticeably. Fuel consumption is also considerably lower than that of the original equipment. Their after-sales service responds promptly, making the cooperation very smooth.”

Mehmet Yılmaz

Production Manager, a textile dyeing and finishing company in Türkiye

“Our washing workshop requires frequent steam on/off cycles and has limited space. Huanuo’s once-through steam boiler occupies a small footprint and produces steam within 2 to 4 minutes, fully keeping up with our pace. The steam is stable and operation is simple—very suitable for our high-intensity washing conditions.”

Rafiq Islam.

Operations Supervisor, a garment washing company in Bangladesh

“Food processing has strict requirements for both steam quality and emissions. Huanuo’s condensing steam boiler has high thermal efficiency and a low exhaust gas temperature, with NOx emissions far below local standards. It helped us easily pass environmental reviews, while natural gas costs have also dropped noticeably.”

Khalid Al-Farsi

Plant Manager, a food processing plant in Saudi Arabia

“We use local agricultural and forestry residues as boiler fuel. Huanuo’s biomass steam boiler has strong fuel adaptability and runs stably, which not only reduces fuel costs but also eases solid waste disposal pressure. Emission indicators meet local environmental requirements, and the overall benefits have exceeded expectations.”

Johan van der Merwe

Energy Manager, a beverage producer in South Africa

“Chemical plants have extremely high requirements for heat source continuity. The waste heat boiler customized by Huanuo fully recovers waste heat from process tail gas and produces steam stably, significantly reducing the cost of purchased steam. Since commissioning, the equipment has operated reliably and provided real help for our energy-saving and consumption-reduction efforts.”

Rajesh Kumar

Technical Director, a chemical company in India

“Our region has long winters and extremely low temperatures, so heating equipment must withstand severe conditions. Huanuo’s hot water boiler starts quickly and supplies heat stably even in low-temperature environments. Throughout the entire heating season, there were no unplanned shutdowns, and our residential heating guarantee capability has improved markedly.”

Dmitry Ivanov

Operations Manager, a district heating company in Russia

“Our exported fruits and vegetables have very high requirements for drying color and moisture content. Huanuo’s hot air furnace provides precise temperature control and clean hot air. After drying, the fruits and vegetables retain a natural color and stable quality, fully meeting export standards. Energy consumption is also lower than that of the original equipment, giving us more reliable capacity during peak season.”

Camila Rojas

Production Head, a fruit and vegetable processor in Chile