Research Of Heat Transfer Enhancement And Waste Heat Utilization On Helical Cooler

In the secondary energy sources of steel production process, sintering lowtemperature waste heat can not be fully used due to the limit of process and technologyand other factors. The deep recovery of sintering waste heat is the breakthrough of ironand steel enterprises to achieve deep energy system optimization and energy saving.The paper first started from theoretical analysis of cooling process in annual andhelical cooler, researched sinter sensible heat efficient extraction method in order toincrease the heat extraction rate, improve quality of the hot exhaust gas, and reduce theheat dissipation. Secondly, based on orthogonal experiment design simulation programs,it analyzed simulation results, identified the priority levels and excellent workingconditions, and found the optimal material thickness and trolley height in helical cooler.Research shows that excellent condition of annual cooler is the particle size of16~25mm,material thickness of1300mm, cooling wind speed of1.3m/s and inlet wind temperatureof90℃. While in helical cooler only the material thickness is different, which is850mm.The order of affecting trend is particle size> inlet air temperature> material thickness>cooling wind. While in helical cooler, the order of affecting trend is particle size>material thickness> inlet air temperature> cooling wind. The optimized trolley height is950mm. Finally, it divides the recovery sections into high, mid and low section eachcontributes36.5%,48.5%and15%. Under the same fan consumption, synergy angle inhelical cooler is-7°. Heat transfer efficiency enhance by0.05%. It proposes twogeneration process using helical cooler as a core equipment.This paper is about the efficient recovery and reuse of sinter sensible heat to dotheoretical and simulation studies, which is of important academic and engineeringsignificance. Research results provide a theoretical reference for the basic scientificproblems of middle and low grade industrial waste heat efficiency recovery, also providetechnical support for the steel industry energy saving.