| 摘要 |
<p>A method of and apparatus for recovering the latent heat of condensation of moisture in the exhaust gases resulting from the burning of fuel in a heating installation, in which sensible heat is recovered by passing the gases through a heat-exchanger (18) and then the gases are passed through a two-stage condensing first heat exchanger (19,20), where the moisture of combustion is condensed to form droplets. The droplets are extracted from the gas flow by turning the gas flow path through 180 DEG in a plenum chamber 23, and also by passing the gases through a droplet extracter 21 disposed downstream of the heat exchanger 20. The gases are then passed through a second heat exchanger 22 where the gases are re-heated to a temperature above the dew point thereof. The sensible and condensing heat exchangers are supplied with liquid heat exchange medium at a suitably low temperature, such as boiler feed or make-up water (26), whereas the re-heat heat exchanger (22) is supplied with relatively hot heat exchange medium, such as water heated by a boiler. Alternatively, at least a portion of the medium passed through the sensible and condensing heat exchangers may thereafter be passed through the re-heat heat exchanger.</p> |
