WASTEWATER HEAT RECOVERY DEVICE AND METHOD THEREOF

摘要

The present invention relates to a wastewater heat recovery device and a method thereof which prevent blockage phenomenon by effectively removing sediment and fine foreign material included in the wastewater. For this purpose, the wastewater heat recovery device comprises: a settling filter unit for settling the sediment contained in the wastewater according to the sedimentation treatment of the wastewater supplied; a heat exchange unit for receiving the wastewater, in which sediment has been removed by passing through the settling filter unit, simultaneously with receiving cold clean water, and then achieving heat exchange between the wastewater and the cold clean water so as to make hot clean water of the cold clean water; and a filtering unit, which is installed between the settling filter unit and the heat exchange unit, for primarily filtering fine foreign material contained in the wastewater passed through the settling filter unit and then secondly filtering fine foreign material contained in the wastewater passed through the heat exchange unit. In the meantime, the wastewater heat recovery method according to the present invention, comprises: a settling treatment step of settling the sediment contained in the wastewater according to the sedimentation treatment of the wastewater supplied; a step of primarily filtering fine foreign material contained in the settling treated wastewater; a step of heat-exchanging the primarily filtered wastewater with the cold clean water to make hot clean water of the cold clean water; and a step of secondly filtering the fine foreign material contained in the heat-exchanged wastewater.