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.蒸汽清洗和干燥的時間蒸汽清洗時間越長，產品的清潔度越好。蒸汽時間過短，產品直接加熱不充分，都會影響產品的干燥效果。因此，蒸汽清洗時間對產品清洗效果至關重要。此外，干燥時間越長，干燥越徹底。干燥效率取決于設備的抽真空能力和產品表面的溫度。一般來說，碳氫真空清洗設備的干燥時間為120-280秒，根據產品的形狀和設備的容量來設定。比如杜爾設備，可以在60秒內完成普通立體產品的清洗和烘干。

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.清洗系統的時間、溫度和真空度清洗時間越長，油污的溶解和分離越好。因此，清洗時間的設定應考慮產品的油污嚴重程度和生產效率。溫度越高，烴類溶劑的分子運動速度越快，其溶解油污的能力和對產品的滲透能力越強。由于烴類溶劑是易燃液體，溫度的設定需要考慮使用的安全性。如果全自動真空碳氫清洗機所用烴類溶劑的閃點較高，可在可控范圍內適當提高清洗溫度，以提高清洗質量。真空度的調整與設備的抽真空能力有關。一般與超聲波配合使用時，真空度越大，泵的抽吸能力越強，封閉的清洗空間內殘留的空氣越少，會減弱超聲波的衰減，從而促進超聲波能量的傳遞，增加超聲波的強度。

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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