内衬

内衬是隔热隧道套管的关键部件，旨在提供连续的热屏障，最大限度地减少内部工艺环境与外部环境之间的热传递。它作为产品流与套管结构之间的主要界面，确保温度维持一致，同时保护外护套免受热应力、腐蚀和机械磨损。通常由耐高温、低导热系数的材料制成，具有精确的尺寸公差和表面光洁度，以优化热效率并防止产品污染。

内衬的工作原理是通过创建低导热屏障，减少传导、对流和辐射热传递，实现隔热。它通过反射辐射热和捕获隔热空气层来维持温度梯度，同时其材料特性抵抗热降解。内衬的结构设计确保最小的热桥效应，并适应内衬与外护套之间的热膨胀差异。

The Inner Liner operates on the principle of thermal insulation by creating a low-conductivity barrier that reduces heat transfer through conduction, convection, and radiation. It maintains temperature gradients by reflecting radiant heat and trapping insulating air layers, while its material properties resist thermal degradation. The liner's structural design ensures minimal thermal bridging and accommodates thermal expansion differentials between the liner and outer casing.