Excess heat in steam and flue gases can be recycled via exodraft’s waste heat recovery systems, converted to hot water and further used. The options include reintegration of the waste heat into the original process or internal use through integration with other processes, room heating, cleaning or bathing facilities. Therefore, it makes good sense to utilize the significant amounts of energy present in flue gases, vapors and other heating processes. Waste that cannot be used internally can also be transferred to a third party, such as a municipal district heating network.
Heat recovery systems and heat exchanger
A heat recovery system for industrial heat recovery from exodraft can, via a heat exchanger, extract excess heat from flue gases and convert the extracted energy into hot water. This way, you can recover up to 90% of the heat that would otherwise have gone out of the chimney and reuse it for example. Heating or reusing it in the production processes.
A heat exchanger including also used to convert waste heat into utility heat, which can be used for heating offices, houses, bathroom facilities, and in fact, the recovered excess heat can even be sent back to the district heating system.
How does a heat recovery system work?
The heat recovery process works by continuously converting waste heat extracted by flue gas into hot water. The process is handled by a plate heat exchanger in the heat recovery system, which is built into the chimney. The discharged flue gases can have a temperature of up to 1200 ° C and can be cooled to between 30 ° C and 60 ° C. By and large, a heat exchanger works by transferring heat from the air to a medium such as water, oil, metal or air that can be used, for example, in central heating systems in factories or office buildings.
Different heat recovery solutions for different environments and environments have been developed to enable different forms of heat recovery. One of the most common forms is waste heat recovery or waste gas recovery systems.
This is how a waste heat recovery unit works
A waste heat recovery unit is usually made of metal and placed between the heat generating process (e.g. a boiler or industrial furnace) and the chimney. Thus, it is not necessary to install a whole new production unit to save energy. A minor adjustment and installation of a heat exchanger saves time and money and can have the same results as a brand new production unit. Another major advantage of a waste heat recovery system is that the flue gases are cooled, which is advantageous in many ways. One of them is that waste heat recovery units by cooling the smoke can liquefy gas emissions so that pollutants can be filtered off. The resulting condensation can be discharged into the drainage system without filtration.
What are the benefits of using a heat recovery system?
There are many benefits to using a heat recovery system, be it very significant reductions in emissions, minimal energy consumption or improvement of the air quality in the building. The system reduces CO2 and reduces emissions overall. The main benefit of starting to use a heat recovery unit is the cost. Up to 90% of the heat in waste heat can be recovered. This will both help the environment and reduce energy costs significantly. A heat recovery unit can be re-installed on existing exhaust / chimney systems and is therefore a cost-saving solution for reducing energy costs, since no new production unit or new chimney system is required. Overall, the solution delivers a balanced system that recovers heat that would otherwise be lost or wasted.
The main advantages for industrial buildings that convert waste heat to heating the plant are the supply of cleaner and constant heating that benefits employees at all seasons. The life of large boilers and industrial ovens is extended because you can avoid sudden temperature changes or high temperatures that cause extra wear. The existing boilers or industrial furnaces work more efficiently, and by reducing emissions, companies operating in a greener environment become more credible. Typically, we experience a payback time (ROI) of 2 to 3 years for a heat recovery plant.