论文部分内容阅读
松脂液蒸馏时需要用闭口管供应大量的热能以蒸发松节油并蒸煮松香。国内许多松香厂的蒸馏设备一般都是用紫铜管作闭口管,但是铜材使用温度一般以300℃以下为宜,蒸馏脂液中的松节油时,过热蒸汽温度常在320—360℃,因此铜管作闭口管是不耐用的。此外,铜管易产生铜绿,影响松香的颜色;紫铜焊接技术也要求较高,焊接不好,使用时焊缝破裂漏汽,将蒸汽冷凝水带进松香中、影响松香质量。为了克服这一缺点,
Pine fat liquid distillation requires the use of closed-end tube to supply a large amount of heat to evaporate turpentine and cooking rosin. Many domestic plant rosin distillation equipment are generally used for copper tube closed pipe, but the copper temperature is generally below 300 ℃, distillation of fat turpentine, superheated steam temperature is often 320-360 ℃, so Copper pipe for closed-end tube is not durable. In addition, copper is easy to produce patina, affecting the color of rosin; copper welding technology also requires higher welding is not good, the use of weld cracks leak steam condensate into the rosin, affecting rosin quality. In order to overcome this shortcoming,