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连续的纸浆蒸煮器的压力容器非常高,且其直径可以为数米。例如,压力容器的底部直径可以为4m到15m,这取决于蒸煮器的生产能力。此类压力容器的顶端处直径通常小于其底端处的直径。然而,蒸煮器的直径通常被设置为借助一个或多个圆锥形的过渡部段,而在蒸煮过程中的出料部段(step-out)的特定位置处增大。在这些位置处需要使用设置在该处的回收筛或提取筛来改变处理液。通常在上述出料部段的下方安装多个筛。
A continuous pulp cooker pressure vessel is very tall, and its diameter can be a few meters. For example, the bottom diameter of the pressure vessel may be 4 m to 15 m, depending on the capacity of the digester. The diameter of the top of such pressure vessels is typically less than the diameter at their bottom ends. However, the diameter of the digester is typically set to increase at certain locations of the step-out during cooking by means of one or more conical transitional sections. At these locations it is necessary to change the treatment liquor using a recovery screen or extraction screen provided there. Multiple screens are usually installed below the discharge section.