| 摘要 |
<p>A blowoff tank (B) for receiving blowdown, blowoff, and drain water from an HRSG (C) or other type of boiler, so as to lower the temperature of that water enough to enable it to be discharged into a sewer system, includes a g enerally cylindrical vessel (50) and inlet pipes (60) through which the blow down, blowoff, and drain water is introduced into the vessel. Each pipe has a radial segment (62) that passes through the sidewall (52) of the vessel, a generally vertical segment (64) that extends upwardly within the vessel, an d a tangential segment (68) that opens into the vessel. The radial segment c ontains a small drain aperture (74). The tank also has a cooling line (90) t hrough which cooling water is introduced into the vessel to lower the temper ature of the blowdown, blowoff, and drain water in the vessel and a drain li ne (86) that drains the mixture of cooling water and blowdown, blowoff, and drain water from the vessel, but never exceeds the elevation of the aperture s in the inlet pipes. Thus, once blowdown, blowoff, and draining are complet ed, water will drain from the inlet pipes and from lines connected to them, all into vessel and thereby reduce a source of corrosion and a cause of wate r hammer in the lines.</p> |
