In previous years, high pressure cleaners were limited […]
In previous years, high pressure cleaners were limited to cleaning, descaling, descaling, deburring and other applications. However, with the continuous development of technology, the characteristics of high-pressure cleaners that are environmentally friendly are becoming more and more important, and the scope of application is also increasingly widespread, involving railways, transportation, machinery, engineering, municipal, construction, chemical, civil, etc. The field, especially the ones that can be used in conventional methods that are difficult to clean, such as toxic, radioactive, non-static in the working environment, and cleaning operations that are prone to explosion hazards.
There are several types of jets used in high pressure cleaners in the petroleum and petrochemical industry:
1. Abrasive jet:
The high pressure cleaner blast cleaning uses the abrasive jet. There are two types of abrasive jets, one is an abrasive water jet and the other is an abrasive slurry jet.
The abrasive water jet is a mixture of high pressure water and abrasive formed by a nozzle to form a solid-liquid two-phase flow; and the abrasive slurry jet is previously mixed with abrasive, water and additives into a slurry and then ejected through a nozzle.
Abrasive water jets are further divided into pre-mixed and post-mixed. At present, there are certain developments in the two methods of abrasive water jet cleaning, and the post-mixing abrasive water jet cleaning application is more extensive.
2. Cavitation jet:
The fragmentation of surface materials mainly utilizes cavitation jets. Cavitation is a complex hydrodynamic phenomenon. For example, in high-speed motion, when the local pressure along a certain part of the object is lower than the saturated vapor pressure at that place, not only the air dissolved in the water will overflow, but also the water itself will begin to vaporize, forming many vacuoles.
These bubbles collapse when they reach the high pressure zone, and the resulting compression or microjets are extremely destructive to nearby solid surfaces. The cavitation phenomenon is applied to the cleaning, which is very beneficial to the fracture of the surface material.
3. With electrically soluble jet:
With electrically soluble jet cleaning is an emerging jet cleaning technology. The high-pressure water jet is broken by compressed air into water droplets that form a gas-soluble jet through a high-speed nozzle. A high voltage direct current electric field is applied between the supersonic nozzle and the low pressure nozzle to charge the gas-soluble liquid flow particles to form a charged gas-soluble jet. Therefore, the electrically soluble jet is cleaned by three functions, and the cleaning effect is greatly enhanced.