Slight cold scale (<0.5mm).
Quick check: increase the water temperature or use hot steam to heat the soft scale
Daily check: put polymer dispersant in the small air separation unit's freezer, and increase the amount of low temperature scale inhibitor.
Make sure the severe cold scale is below1mm
Physical method : Clean the copper pipe with hard brushes clamped by electric drill.
Chemical method : Use chemical agent, clean the freezer alone and do scale sample analysis before cleaning. If the soft scale is made up of carbonate components, use sulfamic acid or hydrochloric acid to clean; if the soft scale is made up of silicate components, use hydrochloric acid to clean: if the soft scale is made up of phosphate components, use EDTA, sulfamic acid, hydrochloric acid compound, and clean under heating condition. During the cleaning process, copper corrosion inhibitor and carbon steel corrosion inhibitor are added and carbon steel pegs and copper pegs are suspended.
The small air separation units and large air separation units maintenance team at Dear Air Separation ensures the safety of liquid air separation plants. The company has a number of patented technologies, including ultra-low discharge pressure energy-saving patents. Compared with the traditional small air separation units energy consumption, it has reduced by 15%, saved a lot of operating costs.
