Rotary spray nozzles wet the mixing chamber and the mixing tools. Among other factors, the size and speed of the droplets also determine the efficiency of the washing.

Rotary spray nozzles wet the mixing chamber and the mixing tools. Among other factors, the size and speed of the droplets also determine the efficiency of the washing.

Wet cleaning of powder mixers; automatically or manually; Washing in Place (WIP)

Factories that produce or process dry materials avoid the presence of water or moisture.

In mixing plants that process dry materials, water is reluctant to tolerate. Water or high humidity in the ambient air can negatively influence the powder quality; especially if bulk materials are hygroscopic. Quality assurance goes out of control when microbiological processes are unintentionally triggered in the mix that contaminate the powder and ambient air. In this respect, the following applies in almost general terms: Companies that process and mix powdery goods usually want to avoid having to wet-clean their mixers. In this respect, opportunities will be sought to dry-clean the devices. In many cases, it is even possible to dispense with manual cleaning if the mixer is hygienically designed.

amixon® blender for 8 m³ batches. This pharmaceutical factory produces tablet masses, vitamin preparations and dietary supplements. This twin-shaft mixer is equipped with an automatic wet cleaning device and drying device. ComDisc® mixing tools provide excellent residual discharge down to a few grams. In this respect, only little washing water is required.

amixon® blender for 8 m³ batches. This pharmaceutical factory produces tablet masses, vitamin preparations and dietary supplements. This twin-shaft mixer is equipped with an automatic wet cleaning device and drying device. ComDisc® mixing tools provide excellent residual discharge down to a few grams. In this respect, only little washing water is required.

Notes with reference to practical experience from the industry

Many bulk solids can only be produced if the mixing plant can be wet cleaned:

  • active pharmaceutical ingredients,
  • vitamin blends,
  • dietary food for babies born prematurely, or sick,...
  • instant products such as spicy sauces, soups, drinks,
  • flavored tea,
  • stabilizers,
  • colour-intensive spices, aromas, flavors, strong-smelling substances,
  • high concentrates,
  • Premixes (premixes) and triturations
  • active substances in which enzymes are involved, or
  • Tobacco; chewing tobacco, snuff, snus
  • plant protection products (fungicides, herbicides, insecticides, ..)
  • inorganic colors, color pigments, ceramic pigments, organic colors,
  • nano powders

this list is without any claim to completeness


    Powder mixing plants that are regularly wet cleaned should be designed to be hygienic. amixon® has 40 years of experience and has developed unique solutions:

    By way of example, this also involves the following items:

    SinConvex®/ Concave® and ComDisc® ensure good residual discharge. This means that (almost) all the mix is utilized right from the start and a lot of washing water is saved. Other aspects relate to the design of the inspection doors and their seals, OmgaSeal® seals particularly close to the product - technically free of dead space, the type and design of the shaft seals, lip seals glide on ceramic shaft coatings - they work optionally with or without gas flushing, the type and design of the dead space-free discharge valve, DosiFlap® can save vertical installation space and replace valves, the operating mode and design of the dust filtration during filling and emptying of the mixer, the type of drying and disposal of the moist vapors, ... and much more

    In the amixon® pilot plant we have good conditions to optimize your mixing processes and cleaning regimes. Optionally, we will demonstrate various wet cleaning concepts to you.


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