Also sometimes called ‘powder pigging’ due to the carryover of the operating principles of conventional pigging from wet processes.
Dry processes offer particular cleaning challenges due to high risk cross-contamination (in particular with Allergens).
Martec have designed and supplied ‘powder pigging’ systems to work with pneumatic conveyors. Screw conveyors and cable drag systems are also feasible. See our demonstration video for the cleaning power of using Powder pigging as a dry CIP.
Challenge: Cross contamination between batches became a critical concern for Bowman Ingredients when they recently expanded production capacity with the installation of new mixer vessels fed by pneumatic conveyors from a sack tip area. Compared with the original practice of direct addition of low volume ingredients at the top of the mixers pipework was becoming encrusted. Especiall...