During the drying process of alumina powder, a large amount of high-temperature exhaust gas is generated. If it is directly discharged, it not only wastes heat energy but also increases environmental load. The waste heat recovery and reuse system for drying aluminum oxide powder effectively recovers heat from exhaust gas through a gas stainless steel cross flow heat exchanger, achieving energy-saving and environmental protection goals.
Working principle: The system utilizes a stainless steel cross flow heat exchanger to exchange heat between the high-temperature exhaust gas emitted during the drying process and cold air. The exhaust gas and cold air cross flow in the heat exchanger, and the heat is transferred through the stainless steel plate wall. The cold air is heated into hot air, while the exhaust gas is cooled and discharged.
Program features:
Efficient recycling: The cross flow design has a high heat exchange efficiency, reaching 60% -80%, fully utilizing the waste heat of exhaust gas.
Durable: Made of stainless steel material, it is resistant to high temperatures and corrosion, and suitable for the characteristics of aluminum oxide powder drying exhaust gas.
Widely used: Recycled hot air can be used for preheating raw materials, drying assistance, or heating, reducing energy consumption.
Process description: Drying exhaust gas → Dust removal pretreatment (if necessary) → Stainless steel cross flow heat exchanger → Hot air output → Reuse.
This solution has a compact structure and stable operation, making it a practical choice for recovering waste heat from drying aluminum oxide powder, helping enterprises save energy, reduce emissions, and improve efficiency.
Before You Start
A successful Aluminum oxide powder drying waste heat recovery and reuse system project begins with measurement. Record the supply and exhaust airflow rates, the temperatures on each side, and the hours the system runs per year. Note any contaminants in the exhaust and the available space for the core and ductwork. These figures decide both the type of exchanger and whether the payback makes sense.
Step-by-Step
First, choose the exchanger type from the air cleanliness and recovery target. Second, size the core using the measured airflow and the log-mean temperature difference, leaving margin for fouling. Third, lay out the duct path so the exhaust is filtered before the core and the supply side has drainage if it may condense. Fourth, add a bypass for free cooling and wire the fans to a simple control. Finally, commission the unit and record baseline temperatures.
Verification
After startup, compare the pre- and post-installation supply temperatures at the same outdoor condition. A steady recovery of 50 percent or more confirms correct sizing. Re-check each season and clean the exhaust side when the recovered temperature begins to fall, because fouling quietly erodes performance over time.
Frequently Asked Questions
Do I need a bypass? In most climates yes, so the system can free-cool when outdoor air is mild. How is sizing done? From measured airflow and the log-mean temperature difference, not from estimates.