Heat exchanger in the form of double-walled tube for recovering waste heat from sewage useful in sewers, bathroom, kitchen and/or swimming pool, comprises an internal tube, which is made of thermal conductive material, and an external tube

摘要

The heat exchanger in the form of a double-walled tube for recovering waste heat from sewage useful in sewers, bathroom, kitchen and/or swimming pool, comprises an internal tube, which is made of thermal conductive material and through which the sewage is discharged, and an external tube. The heat exchanger heats the water flowing in a reverse flow in an intermediate chamber between the outer and the inner walls. The connection of the double-walled tube is formed at an inflow side and an outflow side and at the plastic sewage tubes, so that it is simply put together with sewage tubes. The heat exchanger in the form of a double-walled tube for recovering waste heat from sewage useful in sewers, bathroom, kitchen and/or swimming pool, comprises an internal tube, which is made of thermal conductive material and through which the sewage is discharged, and an external tube. The heat exchanger heats the water flowing in a reverse flow in an intermediate chamber between the outer and the inner walls. The connection of the double-walled tube is formed at an inflow side and an outflow side and at the plastic sewage tubes, so that it is simply put together with sewage tubes without requiring adapter for any adjustments. The pressurized sealed area between the inner and outer walls is provided near the two oppositely-lying ends of the external tube outwardly with the oppositely lying connections for common pressurized-water tubes or pressurized-water pipelines, through which the water to be heated is guided and/or thermally transferred. Several heat exchangers are connected with one another, so that the sewage successively guides through the double-walled exchanger for complete heating. The water to be heated is delivered at the heat exchanger. The heat exchangers are put together to each of the field conditions of the corresponding form by inserting common sewage tube-arcs.