Hydro-Agri

Joanne Vessey (fertilizer analysis). Hydro Agri (UK) Limited, Immingham Dock, UK... 

Another process is the C I Girdler drum system, but it cannot compete in today s market because of size restrictions. Toyo has developed a spouting-fluid technology and by 1996 three plants were in operation. Stamicarbon will also license a fluid-bed plant that is similar to the Hydro-Agri design108. 

Granulation. Almost all new plants that make granules use the Hydro-Agri process, which can be built to make over 3000 tonnes per day. The basic principle of the process involves the spraying of the melt onto recycled seed particles or prills circulating in the granulator. The process is described in more detail in References 108, 109 to 110. 

Hydro Agri Brunsbuttel Germany 1978 Heavy vac. residue Shell Rectisol Ammonia... 

Nitric Acid Technology, Hydro Agri Research Centre, P.O. Box 2560, N-3907, Porsgrunn, Norway, email javier.perez.ramirez hydro.com... 

Hydro Agri Neutralization Under 0.4 0.5 MPa Pressure - Neutralization is carried out at 0.4-0.5 MPa, but the operating temperatures (175 -185°C) require highly resistant materials (special low carbon 304L and titanium). The process flowsheet is shown in Figure 8.10. The heat of reaction is used for concentrating the AN solution to 95% and production of steam for export. 

Figure 8.10. Hydro Agri Medium-Pressure NeutraUzation Pirocess.

In the Hydro-Agri fluid bed granulation process, dedusting of the airstreams from the granulator and fluidized bed cooler is done by scrubbing with acidified weak AN solution. The scrubbing solution is mixed iwth the lime/AN mixture prior to final evaporation. 

In the period from 1976 to 1979, NSM of the Netherlands developed a fluid bed granulation system that has been used in several plants. It produces excellent quality, and its single-train capabilities are up to the 3,500-tpd size that urea plant licensers are sizing up to. This process is now called the Hydro-Agri process. 

Figures 9.8, 9.9, and 9.10 are flow sheets for the three available processes, Hydro-Agri, Toyo Er neer-ing (spouted-fluid bed), and Stamicarbon.

Figure 9.11 shows the "heart of the granulation plant the granulator, as offered by Hydro-Agri. 

Espindesa Grand Paroisse Hoechst Hydro Agri Incro... 

---