Gas coffee shell drum drying production line

1、 Project Background

As the world’s third-largest coffee exporting country, Colombia generates a large amount of coffee husk waste every year. The traditional treatment methods (open-air stacking or incineration) not only pollute the environment, but also waste its biomass energy value. In response to the green transformation policy promoted by the Colombian government, a large coffee processing plant in the area has introduced a gas heat source drum drying production line to achieve efficient resource utilization of coffee shells, while meeting the strict requirements for industrial emissions in the country’s Air Pollution Prevention and Control Action Plan.

2、 Technical solution

①Core equipment configuration

Low nitrogen gas hot blast stove: adopting similar technology to the mature WNS series boilers in the South American market, equipped with a condensation waste heat recovery system, with a thermal efficiency of ≥ 95%.

Intelligent temperature controlled drum dryer: adapted to high humidity climate in Colombia, integrated dual channel drying system.

Exhaust gas treatment unit: Combined with ceramic filtration technology, ensuring that particulate matter emissions are below 20mg/m ³.

②Process flow

Coffee shell (moisture content 40-50%) → crushing and screening → gas hot air drying (180-200 ℃) → cyclone separation → shaping into biomass fuel (calorific value 4500-5000kcal/kg)

3、 Selection criteria for gas heat sources

①Adaptability of energy policies

Colombia is accelerating the expansion of its oil and gas infrastructure, such as the Barranquilla Balena gas pipeline, and improving the stability of gas supply

Compared to coal combustion, gas NOx emissions have been reduced by 60%, meeting the requirements of the Sustainable Development Goals Award issued by the Bogota Chamber of Commerce.

②economic benefits

Utilizing the local natural gas price advantage, the ton processing cost is 12% lower than that of biomass clean carbon fuel

Equipment maintenance cycle extended to three times that of coal-fired systems, reducing labor costs

4、 Colombia Market Promotion Value

Policy alignment: Meets the technical requirements for agricultural waste disposal in the country’s $40 million energy transition plan

Technological extension: can be extended to biomass processing such as sugarcane bagasse and rice husk

Environmental benchmark: Obtained clean production certification from CAEM (Enterprise Environment Company), becoming another demonstration case after the brick factory emission reduction project

This project combines gas heat sources with intelligent drying technology, which not only solves the solid waste problem in Colombia’s coffee industry, but also creates carbon reduction benefits, providing a replicable technological path for the high-value utilization of agricultural biomass in South America. In the future, we can explore energy synergy models with landfill gas power generation, such as the Baichuan Baranqiya project, to further improve overall energy efficiency.