The cleaning methods of heat transfer oil furnace are mainly divided into chemical cleaning (alkali cleaning or acid cleaning) and mechanical cleaning. Generally, metal oxides can be cleaned with acid and chelating agents. Before adding acid and alkali, the dirt and sediments can be removed by solvent. , heat transfer oil in the sludge. If the clean technology treatment is done thoroughly, then the heat transfer performance will inevitably increase the enterprise improvement.
1. Prepare a caustic alkali aqueous solution with a concentration of 3%-5%, then add washing additives, and let it circulate through all parts of the system at 100 °C, so as to flush all instrument pipelines, most of the sediment will be dispersed in the solution, from the oil return pipe Filter out or drain through the system drain. After cleaning, open the low drain pipe to drain the caustic lye.
2. Prepare a solution of the pickling compound and keep it at 90°C-100°C to circulate in the system, passing through each system component at the maximum flow rate. After cleaning, drain the acid liquid from the heat transfer oil system and flush the heat transfer oil boiler system with water.
3. Mechanical cleaning: When the formed insoluble matter blocks the system or forms hard coke on the heater surface, it should be removed by mechanical means. For example, insert the wire wound pressure hose into the system to spray high-pressure water, or use a steam gun and mechanical scraping, or use a high-pressure nitrogen pump to blast or sand into the pipeline for cleaning. High temperature air decoking method is also commonly used to clean the heat transfer oil pipeline. In many cases, major components of the system must be cleaned by mechanical cleaning techniques.
