The invention discloses a heat-
pipe type boiler / furnace /
kiln flue-gas waste-heat
recovery device which externally consists of a cylindrical horizontal vessel and a
heat pipe set, wherein the cylindrical horizontal vessel is provided with a support, supported on the outside of the top of a
flue by the support, and respectively connected with a water
inlet valve, a
safety valve, a pressure gauge, a
discharge valve, a water outlet valve, a liquid level meter and a blow-off valve by pipes; the
heat pipe set is composed of a plurality of heat pipes which are arranged according to a certain rule, the upper half parts of the pipes stretch into the water in the horizontal vessel, and the
lower half parts of the pipes are inserted in the
flue, so that mediums in the pipes are heated by high-temperature
flue gas in the flue so as to form a steam flow, the steam flow transfers heats to the upper half parts of the heat pipes in the process of upward movement and then transfers the heats to the water in the vessel, after the heats are released, the mediums are condensed into liquid, and then the liquid flows back to the
lower half parts of the heat pipes, after the process is circulated repeatedly, the heats in the
flue gas are collected and rapidly transferred to the vessel so as to heat the water in the vessel to a high temperature. The waste-heat
recovery device disclosed by the invention is high in heat efficiency, less in heat-transfer loss, safe and reliable.