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Industrial Case Studies

CTCI Corporation – Deionized Water Projects


Key Figures

CTCI Corporation – Deionized Water Projects
Operation flexibility: The plant can be operated in fully auto/semi-auto/manual modes - Water saving and recovery: RO system is running at 95...

Linkou Deionized Water Project

  • Exclude the scope of site installation
  • Consortium with vessel supplier
  • Strong RO reference for DIW system
  • DIW: 200 m3/hr, 2 trains


Talin Deionized Water Project

  • Talin Power Plant Project reinforced the leading position of Veolia in DIW system of super critical Power Plants in Taiwan
  • DIW: 150 m3/hr & 100 m3/hr , 2 trains


Project Background

Taipei, Taiwan – CTCI Corporation is  headquartered in Taipei and has over 30 years of experience in more than 40 subsidiaries and affiliates located in 13 countries around the world.
Being one of the largest Engineering, Procurement, and Construction (EPC) corporations in Taiwan, CTCI is specialized in undertaking large scale projects at home and abroad.
 

The Client’s Needs

Linkou Deionized Water Project

As a state-owned enterprise, the end-user had high expectations when it came to the quality and safety of water treatment solutions. It engaged Veolia to construct a Deionized Water (DIW) plant in the Linkou district.


Talin Deionized Water Project

Veolia had to design, procure, test and commission a DIW system for the new plant, which is set to be one of the most critical sources of power for the Kaohsiung region in the southwest of Taiwan.

 

Project & Technology Solutions

Linkou Deionized Water Project

  • Demineralization:
    • Activated carbon filter (ACF)
    • 2-Bed-3-Tower (2B3T)
    • Reverse osmosis (RO) system
    • Mixed bed (MB) exchanger


Talin Deionized Water Project

  • ACF + 2B3T + RO + MB (for city water)
  • ACF + RO + MB (for distilled water)
 
Veolia Water Technologies Taiwan has designed the system to meet the treated water requirements and maintains the effluent water within the limits while minimizing operating costs (chemicals, utility, waste and manpower consumption). For each system, two trains arrangement were built into the unit operations to allow equipment to come off-line for routine maintenance without affecting the water quality or quantity.
 
The raw water demineralized water treatment system is designed to produce demineralized water with 150 m³/hr/train net product flow rate and the distillate water demineralized water treatment system is designed to produce demineralized water with 100 m³/hr/train net product flow rate.
 

Process Description

It is a conventional water treatment plant for boiler make-up water. The raw water plant consists of the following processes:

Pre-treatment:
  • Activated carbon filter

Primary demineralization system
  • Weak/strong acid cation exchanger
  • Degasifier and clearwell
  • Weak/strong base anion exchanger

Polishing system
  • Reverse osmosis system
  • Mixed bed exchanger

Associated chemical regeneration system and resin maintenance hopper.
The distillate water plant consists of the following processes:
  • Activated carbon filter
  • Reverse osmosis system
  • Mixed bed exchanger


Performances

The plant performance requirements are stringent as there are some intermediate stage requirements. The primary demineralization system regeneration time can’t exceed 180 minutes and the polishing MB system regeneration time can’t exceed 240 minutes. 
 
Parameters
Carbon dioxide, ppb as CO2, degasifier outlet 5,000 max
Sodium, ppb as Na, strong acid cation exchanger outlet 50 max
Specific conductivity, µs/cm@25℃, strong base anion exchanger outlet 0.8. max
Silica, ppb as SiO2, strong base anion exchanger outlet 20 max
Total silica, ppb as SiO2, mixed bed exchanger outlet 10 max
Sodium, ppb as Na, mixed bed exchanger outlet 3 max
Chloride, ppb as Cl-, mixed bed exchanger outlet 3 max
Specific conductivity, µs/cm@25℃, mixed bed exchanger outlet 0.1 max
SO4-2, ppb, mixed bed exchanger outlet 3 max
TOC, ppb, mixed bed exchanger outlet 100 max