takaisinlämmöntalteenotto

Takaisinlämmöntalteenotto, often abbreviated as EWT (Exhausted Warmth Transfer) or RTO (Regenerative Thermal Oxidizer) in English, is an industrial process used to recover heat from exhaust gases. This recovered heat can then be used to preheat incoming fresh air or fuel, significantly reducing the energy required for a process. The primary application of takaisinlämmöntalteenotto is in thermal oxidizers, which are used to destroy hazardous volatile organic compounds (VOCs) and other air pollutants in industrial exhaust streams.

The process typically involves a combustion chamber where pollutants are oxidized at high temperatures, converting them into less harmful substances like carbon dioxide and water. Before the treated exhaust gases are released into the atmosphere, they pass through a heat exchanger. This heat exchanger is designed to transfer a substantial portion of the thermal energy from the hot exhaust gases to incoming cooler air or fuel. This preheating reduces the amount of external energy, such as natural gas, that needs to be supplied to maintain the high temperatures required for oxidation.

The efficiency of takaisinlämmöntalteenotto systems can be very high, often exceeding 90% thermal recovery. This leads to substantial operational cost savings and a reduced carbon footprint for the industrial facility. The technology is crucial for environmental compliance, as it not only treats harmful emissions but also conserves energy. Different types of heat exchangers, such as ceramic beds or metallic recuperators, can be employed depending on the specific application and temperature requirements. The design and operation are optimized to ensure effective heat transfer while minimizing pressure drop and maximizing the lifespan of the components.