| 摘要 |
<p>The invention relates to a method and apparatus for use in the pulp industry for improving the safety of a spent liquor recovery boiler, such as soda recovery boiler, whereby the boiler comprises, for recovering chemicals and energy, a furnace cooled by water tubes and connected to the water/steam circulation system of the boiler, the cooling of the bottom of said furnace being provided by a separate cooling circulation. The separately cooled lower section of said furnace is provided by separating the bottom or the bottom and part of the furnace walls from the boiler water circulation system. This separated section is supplied with a cooling medium of its own which may be a gas or a liquid which does not cause an explosion if it contacts the melt of the furnace.</p> |
