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On February 10, the gasoline tanks in the oil products workshop of Tianjin Petrochemical’s refining department were emptied as scheduled. Unlike in the past, there were no fully equipped tank cleaning personnel on site; instead, professionals were there to lay cables and construct a specialized walking platform for the robots. “The forward and reverse rotation function of the winch is normal, as is its lifting function. ”Before emptying the tank, the staff responsible for operating the tank-emptying robot check all its functions. “The alert message pop-up function is working properly, as is the voice prompt function. ”The information management personnel responsible for operating the 5G unmanned tank cleaning system also completed the relevant functional tests. Subsequently, the staff operated a tank cleaning robot from outside the tank, which entered the gasoline tank through a DN600 manhole using a dedicated ladder. As soon as it enters the tank, the tank cleaning robot begins to \"transform,\" activating its built-in front and rear explosion-proof lights as well as explosion-proof cameras. Immediately afterwards, the robot used a water gun for cleaning, while a rotary pump was employed to draw out the light mixed oil sludge from the tank at a flow rate of 40 cubic meters per hour. Outside the tank, operators use tablets to wirelessly control the robot for dredging and cleaning, while monitoring operational data and video feeds in real time. Data such as gas environment monitoring figures inside the tank and information on operations are transmitted in real time to the backend system via 5G wireless communication technology, enabling managers to view these data remotely and in real time and to provide guidance for tank cleaning operations, thus ensuring a safe and reliable operating environment and process. “In previous tank cleaning operations, after opening the manhole and confirming that the gas levels were acceptable, it was necessary to wait until the temperature inside the tank dropped below 30 degrees Celsius before the cleaning crew could enter. Now that the temperature inside the tank has dropped below 80 degrees Celsius, robots can enter the tank to carry out tasks, which reduces the ventilation and cooling time and shortens the preparation period. ”Li Zhihong, the person in charge of this project at Tianjin Petrochemical’s Production Department, explained, “What’s more crucial is that workers do not need to enter the tank, which reduces the risks associated with such operations. There is no need to issue permits for working in confined spaces, and there are no restrictions regarding the two-hour limit on the number of times workers can enter such spaces; robots can carry out operations continuously.” ” Since last October, Tianjin Petrochemical’s 5G unmanned tank cleaning system has undergone multiple tests and is now in official operation. Using tank cleaning robots for dredging operations not only reduces the risks associated with such tasks and enhances worker safety, but it also significantly shortens the duration of work and improves the efficiency of tank cleaning. Furthermore, the unmanned tank cleaning system has a practical additional feature. It can collect documentation such as drawings for all tanks, cleaning plans, acceptance documents, and records of inspection and maintenance processes, thereby keeping a complete record of the entire operation. Video footage, real-time gas detection and analysis data, robot operation data, and more can all be uploaded to the platform for long-term storage. This facilitates data analysis of various types of tanks, provides auxiliary management tools for cleaning operations, supports visual training for tank cleaning tasks, enables fast electronic and paperless retrieval of data, and further enhances the professional level of management in tank cleaning operations.