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The automatic vacuum hydrocarbon cleaning machine is mainly composed of five systems, namely cleaning system, distillation recovery system, transportation system, fire protection and safety system and electrical system. The main factors affecting the cleaning quality are the cleaning system and the distillation recovery system. The common problems of hydrocarbon vacuum cleaning equipment are analyzed from the aspects of equipment and process. 1. The distiller will not boil. The distiller generally has two functions: one is to provide steam to the drying tank to purify the product gas phase and increase the temperature; Second, through steam condensation and recovery, hydrocarbon solvents can be recycled for energy conservation and emission reduction. If the distillation in the kettle does not boil, it is equivalent to that the distillation recovery system is paralyzed, the gas phase cleaning fails, and the solvent regeneration cannot be carried out. With the increase of cleaning amount, hydrocarbons in the cleaning tank will be gradually polluted, resulting in unclean product cleaning.

2.蒸汽清洗和干燥的时间蒸汽清洗时间越长，产物的清洁度越好。蒸汽时间过短，产物直接加热不充分，都会影响产物的干燥效果。因此，蒸汽清洗时间对产物清洗效果关重要。此外，干燥时间越长，干燥越彻底。干燥效率取决于设备的抽真空能力和产物表面的温度。一般来说，碳氢真空清洗设备的干燥时间为120-280秒，根据产物的形状和设备的容量来设定。比如杜尔设备，可以在60秒内完成普通立体产物的清洗和烘干。

2. The longer the steam cleaning and drying time, the better the cleanliness of the product. If the steam time is too short and the direct heating of the product is not sufficient, the drying effect of the product will be affected. Therefore, the steam cleaning time is crucial to the product cleaning effect. In addition, the longer the drying time, the more thorough the drying. The drying efficiency depends on the vacuum pumping capacity of the equipment and the temperature of the product surface. Generally speaking, the drying time of the hydrocarbon vacuum cleaning equipment is 120-280 seconds, which is set according to the shape of the product and the capacity of the equipment. For example, Duer equipment can complete the cleaning and drying of ordinary three-dimensional products in 60 seconds.

3.清洗系统的时间、温度和真空度清洗时间越长，油污的溶解和分离越好。因此，清洗时间的设定应考虑产物的油污严重程度和生产效率。温度越高，烃类溶剂的分子运动速度越快，其溶解油污的能力和对产物的渗透能力越强。由于烃类溶剂是易燃液体，温度的设定需要考虑使用的性。如果全自动真空碳氢清洗机所用烃类溶剂的闪点较高，可在可控范围内适当提高清洗温度，以提高清洗质量。真空度的调整与设备的抽真空能力有关。一般与超声波配合使用时，真空度越大，泵的抽吸能力越强，封闭的清洗空间内残留的空气越少，会减弱超声波的衰减，从而促进超声波能量的传递，增加超声波的强度。

3. The longer the cleaning time, temperature and vacuum of the cleaning system, the better the dissolution and separation of oil stain. Therefore, the oil pollution severity and production efficiency of the product should be considered when setting the cleaning time. The higher the temperature is, the faster the molecular movement speed of hydrocarbon solvent is, and the stronger its ability to dissolve oil stains and penetrate products is. Because hydrocarbon solvents are flammable liquids, the temperature setting needs to consider the safety of use. If the flash point of hydrocarbon solvent used in the automatic vacuum hydrocarbon cleaning machine is high, the cleaning temperature can be appropriately increased within the controllable range to improve the cleaning quality. The adjustment of vacuum degree is related to the vacuum pumping capacity of the equipment. Generally, when used together with ultrasonic, the greater the vacuum, the stronger the pump's suction capacity, and the less air remains in the closed cleaning space, which will weaken the attenuation of ultrasonic, thus promoting the transmission of ultrasonic energy and increasing the intensity of ultrasonic.

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