The forms of industrial waste gas heat recovery include:
- Heat Exchanger Recovery: Using heat exchangers (e.g., plate, tube, or finned types) to transfer heat from waste gas to a cold fluid (e.g., water or air) for heating process media or generating steam.
- Steam Generator: Utilizing waste heat to drive a steam generator, producing steam for industrial processes or heating.
- Heat Pipe Technology: Employing heat pipe heat exchangers to recover waste heat efficiently, often used for medium- and low-temperature heat recovery.
- Organic Rankine Cycle (ORC): Using waste heat to drive an ORC system, converting heat into electricity, suitable for medium- and low-temperature heat.
- Heat Pump Systems: Upgrading low-grade waste heat to higher temperatures via heat pumps for heating or process needs.
- Direct Utilization: Directly using waste heat to preheat raw materials, air, or fuel, such as for combustion air preheating or material drying.
- Combined Heat and Power (CHP): Integrating waste heat for both power generation and heating to improve overall energy efficiency.
- Thermal Storage Recovery: Storing waste heat in thermal storage materials (e.g., ceramics or metals) for later use.