The following key points should be noted in the application of industrial-scale drum-type commercial roasters:
Boiler structure and thermal energy utilization: The boiler design of drum-type commercial roasters affects the efficiency of thermal energy transfer. The double-layer boiler structure reduces direct heat conduction through an air buffer layer between the outer and inner layers, lowers the risk of coffee bean surface charring, and allows for higher temperatures, thereby enhancing the overall roasting effect. Single-layer boilers rely on conduction heat and have a relatively fast baking speed, but they are more difficult to control and are prone to the situation where the surface is charred while the interior is not fully cooked.
Heat source type and efficiency: Industrial-scale baking machines need to select heat sources such as gas, oil, electricity, steam or biomass fuel based on cost, environmental protection requirements and local energy supply conditions. Equipment with high thermal efficiency can effectively reduce energy consumption and save operating costs.
Automation and control system: Equipment equipped with an intelligent control system can automatically adjust parameters such as temperature, humidity, and rotational speed, thereby enhancing baking efficiency. The real-time monitoring and fault alarm functions can reduce manual intervention and lower the operational difficulty.
Drum speed and lifting plate design: The drum speed affects the flow of materials inside the drum and the heat exchange efficiency. The multi-angle lifting type lifting plate can ensure that the materials are evenly distributed, fully exchange heat with the high-temperature furnace gas, and improve the drying effect.
Feeding and discharging devices and exhaust system: The feeding pipe, discharging pipe and exhaust fan must ensure the flow of materials inside the cylinder and the discharge of high-temperature and high-pressure air to guarantee the safety and stable operation of the equipment. The exhaust system needs to be highly efficient to prevent smoke and dust from polluting the environment.
Maintenance and cleaning: The drum roaster needs to be regularly cleaned of the drum, air duct and filter screen to prevent residual soybean residue or impurities from affecting the flavor. The material of the equipment should be heat-resistant and corrosion-resistant to extend its service life.
Safety and environmental protection: The equipment must comply with relevant safety certification standards and be equipped with safety designs such as overheat protection and emergency bean feeding devices. In terms of environmental protection, it is necessary to reduce carbon emissions and the generation of harmful substances, incorporate filtration and cleaning systems, and ensure that pollution during the baking process is minimized.