Patent ID: 8181693
Filing Date: 2012-05-22
Classification: F28G

Abstract:
1. A self-cleaning heat exchanger using a solid particle-water supply system, the heat exchanger being a shell and tube type having a plurality of arrayed vertical heat transfer tubes, wherein high-temperature exhaust gas containing fouling materials flows into an exhaust gas inlet, as an inflow port, at an upper portion of the heat exchanger, and is then cooled while flowing down along the inside of the heat transfer tubes so that the resultant cooled exhaust gas is discharged through an exhaust gas outlet as an outflow port at the lower portion of the heat exchanger main body, the heat exchanger comprising: solid particle supplying means for storing and supplying solid particles to be used in cleaning the heat exchanger tubes; water supply means for fluidizing the solid particles stored in the solid particle supplying means so as to supply the solid particles into mixed fluid discharging means, or for directly supplying water to the mixed fluid discharging means; the mixed fluid discharging means for sucking the supplied solid particles and water, and for spraying the supplied solid particles and water as a mixed fluid from above the heat transfer tubes such that the heat transfer tubes are cleaned; and separating means for separating the mixed fluid used in cleaning the heat transfer tubes into solid particles and water, using gravitational separation method, wherein the solid particle supplying means comprises a mixed fluid tank supplied and stored with the mixed fluid used in cleaning the heat transfer tubes of the heat exchanger main body, wherein the water supplying means comprises: