Prayon
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Filtration

Industrial companies consider Prayon’s tilting pan filter a highly reliable and efficient tool to produce phosphoric acid.

PROFILE has also developed a new belt filter.

The Prayon filter

Over 300 Prayon tilting pan filters have been sold since the 1950s, and approximately 250 installed in phosphoric-acid production units. The rest are used in other fields such as:

  • Copper, cobalt, zinc and uranium hydrometallurgy;
  • P2O5-impregnated active carbon washing;
  • Phosphate washing;
  • Acid filtration in general.

The Prayon filter

Main developments

  • A special compact vacuum box for separating gases and the various filtrates;
  • A fast-drain filtration cell (pan) which can increase filter capacity and filtration yield;
  • An automatic system to keep the pans horizontal;
  • A new tilting-track design for higher rotation speed and filtration capacity;
  • Support rollers designed for heavy loads;
  • A robust rotating frame with a replaceable wear plate;
  • A new waterproof cloth-fixing system meaning that the cloth can be replaced in a very short time;
  • A high filtering surface to base area ratio.

Main benefits

  • High level of reliability due to their robust design; indeed, a number of filters sold in the 1960s are still in operation;
  • On-stream factor of over 95%;
  • Excellent capacity / extraction yield ratio, due to batch filtration and a high authorised maximum vacuum level;
  • Extremely energy-efficient;
  • Negligible recycling of the solids recovered during cloth washing, meaning that the cake discharged from Prayon filters contains very little free water;
  • Able to benefit from Prayon’s proven track record with very large filters (e.g. 30-240 filter with a surface area of 275 m²).

LISTING of PRAYON Filters
 
MODEL TOTAL DAHF HH CPP DH DD DH SWD DH WD MAXIMUM
FOOTPRINT
  m2 m2 m2 m2 m2 m2 m2 (⌀)
24-60 58 39 43 47 48 50 13,8
24-85 86 58 64 69 71 74 16,2
24-115 114 76 84 91 93 98 16,9
24-140 140 94 104 112 115 120 19,4
24-175 175 117 130 140 144 151 20,7
24-200 204 137 151 163 167 175 21,7
24-212 212 142 157 170 174 182 21,9
 
30-220 219 149 164 180 184 188 22,3
30-245 245 167 184 201 206 211 25,2
30-260 259 176 194 212 218 223 25,5
 
36-300 300 222 243 245 249 256 28,8
36-330 330 244 267 270 274 281 29,5

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Contact

PROFILE
144, rue J. Wauters
4480 Engis
Belgium
Tel: + 32 4 273 96 52
Fax: + 32 4 275 62 06
E-mail : profile@prayon.com

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