In today's railway tank car cleaning field, cleaning is divided into two kinds: general washing and special washing, according to the relevant quality requirements, the general car wash only needs to be cleaned overnight, cleaned and wiped without impurities, and the special car wash needs to be steamed and washed. However, in the northern region, due to the cold weather in winter, if there is water stored in the outlet pipe or pump of the ultra-high pressure pumping station, it is easier to freeze the pipeline and pump, and even cause the ultra-high pressure pumping station to be scrapped, the problem is very serious, on the other hand, the water temperature in winter is low will also affect the cleaning effect, in order to use the automatic cleaning system of the high-pressure water railway tank car in the cold area of the north, it is necessary to solve the problem of anti-freezing and condensation.
The specific implementation rules are to equip the water storage tank of the ultra-high pressure pumping station with a pre-heating device, add thermal insulation and anti-freezing measures to the connected pipelines and valves, and blow out the water storage in the system after cleaning. Due to the low temperature in the northern region in winter, once the water stored in the high-pressure plunger pump and water pipe is not clean, it may freeze and even freeze the equipment, resulting in the shutdown of the whole system. Therefore, in order to ensure the normal use of the automatic cleaning system of high-pressure water railway tank cars in the northern region, combined with the actual situation of the site, we have carried out the following anti-freezing measures.
First of all, the venting valve is added at the lowest point of the inlet pipe, and the water in the inlet pipe is emptied in time after the ultra-high pressure pumping station is out of serviceSecondly, the ultra-high pressure pumping station is equipped with insulation equipment, and the electric heat tracing is wound on the pipeline and a temperature control system is addedThen there is the use of steam heating coil or electric heating pipe in the water storage tank for heating, and the temperature sensor is set to interlock with the steam inlet valve.
After the system is shut down, the on-site compressed air quick connector is used to access the pipeline to purge the water in the management and blow out the stored waterThe drain valve and elbow on the exhaust pipeline of the original standard design of the ultra-high pressure pumping station were removed, and special-shaped joints were installed to blow out the stored water in the ultra-high pressure pump with the help of compressed air.
Through the improved high-pressure water railway tank car automatic cleaning system in the winter car washing, the pump and the water storage in the pipeline can be quickly dried with compressed air, and the water storage tank and related pipelines can be heated and insulated at the same time, after the winter use measurement, the temperature is nearly 20 below zero, and the temperature in the pump and the pipe is stable at 05 8, to ensure the normal use of the high-pressure water railway tank car automatic cleaning system in the cold areas of the north, the last need to remind is that after the cleaning work is completed, the water stored in the equipment must be blown dry to prevent the equipment from freezing and cracking.