A combined active and passive temperature control device for air preheater thermal storage elements

Abstract

This invention provides a combined active and passive temperature control device for an air preheater's heat storage element, comprising an injection assembly and a baffle plate. The injection assembly includes a row of nozzles, and the baffle plate is installed behind the nozzle nozzles. The baffle plate extends from both sides of the nozzles away from them to block airflow from behind the nozzle nozzles. By blocking cold air with the baffle plate behind the nozzles, the high-temperature medium injected by the nozzles is prevented from rapidly cooling due to the mixing of cold air, thus significantly increasing the heating effect of the high-temperature medium on the heat storage element. Therefore, the baffle plate acts as a passive temperature control mechanism. The injection assembly and the baffle plate together provide combined active and passive temperature control, increasing the high-temperature heat source, reducing the impact of cold air, raising the wall temperature of the heat storage element, and achieving a clearing effect.

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