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Home > Projects> Pueblo Viejo Dominicana Corporation, Dominican Republic, Demineralised Water Treatment Package for Pueblo Viejo Project 

Pueblo Viejo Dominicana Corporation, Dominican Republic, Demineralised Water Treatment Package for Pueblo Viejo Project

Project Summary:

Project Type:

Design, Build and Service

Project Category:

Domestic Sewage

Project Purpose:

To demineralise water
Design Flow: 240 Cubic Metres/day
Year of completion: 2012


Full Description:
Napier-Reid

Background
Napier-Reid provided a demineralised water treatment system for Pueblo Viejo Dominican Corporation, Dominican Republic to treat surface water with the peak flow rate of 240 m3/day for industrial usage.

Scope of Supply
The water treatment system includes multimedia filters, polymer feed system, packed bed cation column, packed bed anion column, sulphuric acid regeneration system and caustic regeneration system. Napier-Reid supplied all the pressure vessels and pipes. All the vessels were designed, fabricated and tested as per ASME Sec. VIII Div 1 (2007). The entire system was preassembled at our factory and tested to ensure that all the components would be installed easily at the jobsite.

  1. Multimedia Filters
  2. Filter Medias
  3. 2 – Air-Scour Blowers (one duty, one standby)
  4. Inline Static Mixer
  5. Polymer Dosage Tank/Polymer Dosage Tank Agitator
  6. Packed Bed Counter-Current Cation Column
  7. Sulphuric Acid Feed Pumps
  8. SAC Resin
  9. Packed Bed Counter-Current Anion Column
  10. Caustic Feed Pumps
  11. Iox Inline Heater
  12. SBA Resin
  13. PLC Control Panel

Performance Data
Feed water is pretreated with polymer to produce flocs of suspended solids, and then flows into two parallel multimedia filters equipped with two common air-scour blowers (one duty and one standby). Each filter performs a down flow filtration with five automatic operation modes: Stop /Rinse (Filter to Waste) /Service Ready /Service (filtering) /Backwash. The process is controlled


Packed Bed Cation Column & Packed Bed Anion Column, Dominican Republic

by PLC system. Filtered water from storage tank is used to backwash filters.

Filtered water then enters demineralization system to produce demineralised water. The flow passes through packed bed cation column using Strong Acid Cation (SAC) exchanger to remove the cationic ions in water, and then passes through packed bed anion column using Strong Base Anion (SBA) exchanger for anionic ions removal. Demineralised water finally flows to storage tank. Cation column and anion column are regenerated by sulphuric acid regeneration system and caustic regeneration system, respectively. An inline heater is used to raise the temperature of caustic regeneration up to 45 °C, to increase the regeneration efficiency.

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