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Heat recovery and mechanical chimney draught control for foundries


There are heat recovery and chimney draught solutions that utilize waste heat from production processes, which would otherwise have been wasted and dissipated into the atmosphere. exodraft’s heat recovery systems reuse heat energy, even at very high temperatures, by first identifying major heat sources and placing heat exchangers strategically in order to capture this heat. When the heat is captured by the heat exchanger, it is transferred into hot water and can, for instance, be stored in tanks for later use.

exodraft’s chimney fans control the chimney draught associated with industrial processes. This way the effect is optimized while product flow is made uniform.

When exodraft heat recovery systems are implemented in metal casting processes, the first step is to identify the major heat sources. In a typical foundry, the use of melting ovens is the primary heat source with an estimated 50-55% heat dissipation involved in the melting process. For instance, the degassing temperatures from ovens for aluminum casting reach 2400°C, and in iron casting, the temperature in the oven is 800-950°C. Other heat developed processes could be things like preheating of combustion air, etc. The heat recovery process provides extensive advantages. As an example, the heat can be used directly in the process or for things like cleaning of facilities and equipment.

The purpose of the heat recovery system is primarily to utilize resources better and to reduce costs in the production process, which can be read in the operating expenses during a short time after installation of out heat recovery technology.

With mechanical chimney fans, the draught can be made uniform. The metal casting process benefits greatly from stable draught and temperature conditions. Of course, yet another advantage is the much-reduced energy consumption and the reduction in CO2 emission. These factors are direct consequences of the optimized effect that follows a consistent draught.

We use exodraft’s OptiCalcHR software to help your company by calculating the recovery potential, and we give you an evaluation of the cost savings, of how much CO2 emissions can be reduced, and of the time it will take for the investment to pay for itself. After analyzing the production plant, we help you take a well-informed decision about the right exodraft solution for your company. Our service can also include implementation of our Trendlog software, which monitors and provides an overview of your heat recovery system in real time. This way, the foundry is always completely up to date in terms of consumption and savings.

    Fill out this appraisal form to clarify your heat recovery potential:

    How do you see your recovered heat being used (you can select multiple options)?:
    Transferred to the district heating systemUsed in production processesHeating of factory, Warehouse or office premisesUsed for absorption chillers/refrigerationHot water for bathing facilitiesAir curtain & air heating systemsHot water for general cleaning/washing purposesOther

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