Tunnel Dryer: Core Questions and Answers for Continuous Drying Scenarios
2025/10/31 09:08:50 Number of views:28
Question 1: Can tunnel dryers be adapted for bulk drying of coal lumps, briquettes, and similar materials? How to combine Chain plate dryer with briquette dryers and coal dryers to improve efficiency?
Many users are confused about the adaptability of tunnel dryers when processing bulk materials such as coal lumps and briquettes, especially worrying about uneven drying and conveying jams during continuous operation. In fact, the core advantage of tunnel dryers lies in continuous production. As a key conveying and drying unit, the Chain plate dryer (chain plate dryer) can perfectly match the process requirements of briquette dryers and coal dryers. The high temperature resistance and strong load-bearing capacity of the chain plate ensure stable conveying of bulk materials in the tunnel, avoiding accumulation. By adjusting the hot air temperature in the tunnel (60-120℃ for coal drying and 80-150℃ for briquette drying) and the chain plate conveying speed, uniform heating of materials can be achieved, and the drying efficiency is increased by more than 30% compared with traditional equipment.
Question 2: How to solve the problems of high energy consumption and large dust content in exhaust gas when tunnel dryers process high-humidity coal?
When high-humidity coal (moisture content above 30%) enters the tunnel dryer, direct high-temperature drying will consume a lot of heat energy due to rapid moisture evaporation, and dust is easily discharged with the exhaust gas, causing pollution. Solutions: First, add a pre-drying link. Use the primary drying function of coal dryers to reduce the moisture content of coal to below 20% before sending it to the tunnel dryer for deep drying, which can reduce energy consumption by 40%. Second, install a pulse dust collector (auxiliary equipment) at the tunnel outlet, combined with a heat exchanger to recover waste heat from the exhaust gas. This not only reduces dust emissions (compliance concentration ≤10mg/m³) but also uses the waste heat to preheat fresh air, further reducing energy consumption.
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