I. Overview of Railway Oil Tanker

    In the 21st century, China's economy has maintained a stable growth rate and continues to move forward. People are increasingly demanding for the quality of life, and the demand for energy is also increasing. Every year, China imports a large amount of crude oil and natural gas, and China has become a The second largest energy demand country after the United States.

    At present, the transportation of oil can be carried out by oil tanker shipping, oil pipeline transportation, railway transportation and other methods. Crude oil can only be transported from the port of the exporting country to the port of the importing country by sea. It cannot reach the final purchasing customer directly. It also needs another transportation method (railway / car transportation) to arrive. The transportation time is long; (China) One of the petroleum transportation methods adopted by the exporting country (Russia) with land borders. This method has a high initial investment cost and can only reach the designated location like sea transportation. Rail transportation is more than the above two transportation methods. With its own advantages, China ’s railway transportation network coverage is getting higher and higher, and the use of existing railway resources can ensure that crude oil can reach the end users to the maximum (most crude oil processing companies have built their own crude oil transportation railway lines), Therefore, railway transportation can be used in the import of crude oil, and it can also be used in the secondary transportation of imported domestic land.

    Rail transport of crude oil is now carried in tanks and then transported to the end user in entire trains. The oil tank is generally a steel tank with a length of 12 meters and a diameter of no more than 2.5 meters. It adopts a safe and explosion-proof design. The tank is equipped with crude oil inlets and outlets and manholes. The crude oil loading per tank is generally 50 ~ 70 Ton, a train can carry 12 ~ 36 oil tanks, which can be reused after cleaning.

The Necessity of Railway Tanker Cleaning

     At present, with the development of China ’s economy and the increase in people ’s consumption levels, China ’s demand for oil is increasing, and it is necessary to import a large amount of crude oil to supplement the insufficient domestic supply. At the same time, due to political and economic interests, we It ’s impossible for a single oil supplier to have only one country, but to come from multiple countries. There are huge differences in the quality of crude oil from different supplier countries. The crude oil of the oil products must have a production process adapted to it. It is necessary to control the transportation of crude oil. It is also an important part to clean the oil tanks that are repeatedly used during rail transportation. During the unloading process, because the crude oil has a large viscosity, it is easy to stick to the tank wall. Especially when most of the crude oil has been discharged, it takes a long time to discharge the crude oil at the bottom. At this time, the gravity of crude oil alone is not enough. It is necessary to accelerate the discharge of crude oil by using a certain amount of water impact force to ensure that the crude oil in the tank is completely and quickly unloaded, reducing unnecessary waste and saving time for customers. If only the crude oil's own weight is used to discharge crude oil, after a long period of use, the crude oil tanker will inevitably accumulate a certain thickness of crude oil dirt, which will not only affect the crude oil itself in the tank, the efficiency of unloading, but also the loading Efficiency and the quality of the tank body, so that certain cleaning of the tank becomes inevitable. Therefore, the cleaning of railway oil tanker trucks has the dual functions of removing oil residues in the tank and assisting in oil unloading, which can save oil unloading costs, time and reduce crude oil waste for crude oil purchase customers (refineries, etc.).

Third, cleaning method

    The cleaning of railway oil tankers usually uses manual operations, and individual companies have also begun to use mechanical cleaning methods, such as impact cleaning. Manual cleaning is currently the most common method. Due to its potential safety hazards, it has been gradually replaced by rotary impact cleaning methods. As a more efficient cleaning method, Keliying rotary impact cleaning has been increasingly used. This cleaning technology has been widely used abroad.