Powder Recovery of Fertilizers

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The recovery of fertilizers typically after drying tunnels or drum dryers is associated with a high load of particulates and very humid gas streams. To recover these products, cyclone collectors are very convenient equipments for allowing a direct powder capture and avoiding filter clogging due to condensation. Arrangements with cyclones or with bag filters are usual in the industry.

Client's needs include a low maintenance high efficiency cyclone system that is efficient enough to comply with regulatory PM limits avoiding the use of a bag filter as the primary or final stage deduster.

A single Hurricane is more efficient than any other cyclone in the market.
Hurricane lines of cyclones can be optimized to be an efficient pre-separator to reduce concentration after the calciner, as it can amount to several g/m3, but also to work as a final stage dedusting system.

ACS has experience in several calcining applications, including low temperature dolomitic lime (MVD = 27 µm; ? = 97%), or quicklime (MVD = 27 µm; ? = 91%) and high temperature metacaolin.  

In calcination processes, concerns have to be taken regarding the abrasiveness of some dusts, which implies the cyclones to be inner lined with ceramic titles or ceramic bases cement. In high temperature applications, the selection of steel is is very important.

  • Very high efficiencies: down to 10-20 % of the emissions of other high efficiency cyclones;
  • Custom designs (single or parallel arrangement)
  • Low pressure drop: [100 - 150] mm w. g.
  • No temperature restrictions with the right choice of steel. Carbon Steel - P355NH Steel - 16M03 Steel - 253MA Steel
  • Robust construction with no moving parts
  • Near zero maintenance and downtime costs
  • Very low operating costs
  • Pre-assembled modular system with very easy and fast installation. Batteries of 2, 4, 6 or 8 cyclones are shipped pre-assembled in a supporting structure with or without thermal insulation.
  • Low investment cost

Image
  1. Air and Dust from Dryer or Boiler
  2. Hurricane Cyclone
  3. Valve
  4. Collected Particles
  5. Clean Air

A ReCyclone MH decreases emissions of Hurricane cyclones alone by 40 to 60 %

Mechanical ReCyclone Systems (ReCyclone MH) are a solution to improve cyclone efficiency, when working as a final dedusting system. They can work with several lines of Hurricane cyclones with different performances depending on the requests of the clients.

ReCyclone MH decreases emissions of Hurricane cyclones alone by 40 to 60 %

As with cyclone systems, ReCyclone MH systems are very robust, do not have temperature limitations and do not have moving parts to be frequently changed.

In calcination lines, concerns have to be taken regarding the peripheral equipment, namely recirculation fan and rotary valves to stand abrasive dusts and high temperatures.

  • Very high efficiencies: decreases emissions of Hurricane Cyclones by [40-60]%
  • Pressure drop: [150-220] mm w. g.
  • No temperature restrictions with the right choice of steel. Carbon Steel - P355NH Steel -16M03 Steel - 253MA Steel
  • Robust construction with no moving parts
  • Near zero maintenance and downtime costs
  • Low operating costs
  • Pre-assembled modular system with very easy and fast installation. Batteries of 2, 4, 6 or 8 cyclones or mechanical recirculators are shipped pre-assembled in a supporting structure with or without thermal insulation.
  • Low investment costs

Image
  1. Air and dust from boiler or dryer
  2. Hurricane cyclone
  3. Discharge valve
  4. Collected Particles
  5. Clean air
  6. Recirculator
  7. Fan

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