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Heat recovery and mechanical chimney draught control for heat treatment plants

heat treatment cover

Heat recovery systems give industries the option of taking advantage of already existing industrial processes that involve high temperatures and reduce costs associated with the production process. The heat recovery process works by recovering heat, which would otherwise be discharged to the outside from various heating processes and converting it into hot water for free use in any number of possible contexts. By recovering energy that would otherwise have been wasted, you can gain significant savings in the production process.

In heat treatment plants, materials are often processed at extremely high temperatures in order to change their physical or chemical state, where the materials in question are usually metals, such as aluminum, lead, copper, or cast iron. exodraft’s heat recovery systems and mechanical chimney fans reduce production costs by reducing energy consumption and reusing available resources. Compared to other industries, the amount of heat that can generally be reused in heat treatment plants is significantly higher, thus creating the potential for very short investment horizons.


Heat treatment can largely be divided into three stages – heating, soaking, and cooling of the material in question. While heat treatment is usually associated with metals, it can also be used in the production of other materials, such as glass. In the heat recovery process, we start by identifying the major heat sources in order to place heat exchangers in strategically optimal locations for the purpose of converting thermal energy into hot water. For instance, the hot water can be stored in buffer tanks, where it is always available at the desired temperature and in the right quantities.

There are several options for heat recovery in each of the three stages of the heat treatment process, e.g. in heat treatment processes for aluminum that process the material in an oven for an hour at temperatures exceeding 550°C. Other metals, such as steel, which undergoes 12 hours of heat treatment at 1200°C, goes through a similar process, enabling heat exchangers to capture significant amounts of heat from the oven. Thus, heat recovery from heat treatment processes is extremely advantageous.

First of all, heat recovery systems enable a reduction in cost by reusing the heat in various ways. The hot water can be used for cleaning, heating and as part of the production cycle, such as at the drying stage. The sky is the limit for possible uses of the recovered heat.

exodraft’s chimney fans are often used at heat treatment plants for control of the necessary draught in pipes and chimneys. In this way, the plant becomes completely unaffected by changing conditions outside (pressure, humidity, temperature, wind direction, etc.) as the draught is kept uniform by mechanical means.

Our team of experts analyses your production plant using out OptiCalcHR software, and we help you make an estimate of how much heat can be recovered. Your cost savings and CO2 reduction will also be Quantified. Once you have an estimate of how much you can save using our heat recovery systems and mechanical chimney draught control, we can analyze the timeframe for your return on investment. The finished system can be monitored in real time through our Trendlog software and help you by keeping an eye on your energy savings. This will not only be an advantage for your industry, but also for the environment, since reduced energy consumption and less wasted heat equate to a reduction in CO2 emissions.

    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

    Case Studies