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Design of cleaning technology solution for ultra-large pressure vessels in petrochemical industry

Design of cleaning technology solution for ultra-large pressure vessels in petrochemical industry

A pressure vessel is a closed container that can withstand pressure. Pressure vessels are extremely versatile and play an important role in many sectors such as industry, civil use, and military industry, as well as in many fields of scientific research. Among them, it is most used in the chemical industry and petrochemical industry. In the chemical and petrochemical fields, pressure vessels are mainly used for processes such as heat transfer, mass transfer, and reaction, as well as for the storage and transportation of pressurized gases or liquefied gases.

There are the following problems with existing technology:

1. The diameter of some existing pressure vessel inner wall cleaning devices is too small, and manual cleaning is inconvenient, which greatly increases the complexity of manual cleaning and increases the labor intensity of staff;

2. Some existing pressure vessel inner wall cleaning devices cannot repeatedly clean the inner wall of the container. One cleaning cannot remove debris that has been attached to the inner wall of the container for a long time, which reduces the cleaning efficiency of the cleaning device.

In order to solve the existing problems, Changyuan Spray independently developed and produced a closed high-pressure water jet automatic cleaning equipment that is reliable and practical, has good cleaning effects, is environmentally friendly and consumes little energy. The system uses a high-pressure cleaning machine, a three-dimensional tank washer, and a feed It is composed of mechanism, traction device, control operating system, etc., and the mechanical and automated operation completes the process of air change → residual liquid extraction → steam → cleaning and vacuum extraction → drying.

Changyuan spray pressure vessel cleaning system is used for automatic internal cleaning of petrochemical pressure vessels:

Its main working principle is to control the opening of the water pump, the control of each valve and the action control of each mechanism through an intelligent electronic control system, and use the cleaning solvent in the water inlet pipe to drive the cleaning nozzle of the three-dimensional tank washer to provide three-dimensional coverage of the tank without blind spots. Perform cycle cleaning.

Working steps of pressure vessel cleaning system:

1. After the pressure vessel stops working, the pressure cover and accessories are removed, and personnel evacuate the top of the vessel to start the equipment.

2. Start the pressure vessel automatic cleaning system equipment, operate the control handle, adjust the telescopic rod to vertical, and according to the image returned by the camera, align the telescopic rod with the manhole cover and extend it into the pressure vessel until it reaches the pressure vessel, start Gland the cylinder, cover the manhole cover, start the water pump, and gradually clean it downwards. Stop spraying water after washing the cabin.

3. Operate the control handle, adjust the telescopic rod to the level, find the entrance to the second compartment according to the image returned by the camera, start the pipe feeding device to extend the nozzle to the second compartment, start the water pump, and gradually reach forward for cleaning. After washing, The cabin stops the water pump.

4. Operate the control handle, extend the telescopic rod to send back the image through the camera, find the entrance to the third compartment, start the pipe feeding device, extend the nozzle to the third compartment, start the water pump, and gradually extend it forward for cleaning. After washing the cabin, Stop the water pump.

5. Finally, retract the telescopic rod, adjust it to vertical, start the gland cylinder to retract, return the lifting rod to the top, level the telescopic rod, and complete the cleaning process of the single manhole cover. It can be moved to different manhole cover positions to enter the next stage of cleaning.

A chemical company has used the Changyuan spray pressure vessel automated cleaning system. Compared with the original traditional tank washing process, it can save more than 90% of energy, significantly reduce energy consumption, and reduce costs. Only by ensuring that the pressure vessel is clean and stable can the safety and quality of the petrochemical industry be ensured. We believe that fully automated, high-efficiency, and high-cleanliness petrochemical automated cleaning systems will definitely bring better development prospects to the cleaning industry.

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