Qassim Power Plant conversion project


Installation of Pure Water Group continuous electro-deionization (CEDI) units is in progress as part of the Qassim Power Plant conversion project, on the Arabian Peninsula. The Saudi Arabian Electrical Company (SEC) project will convert two generating sites from simple cycle to combined cycle operation.

The ‘ready-to-run’ CEDI units are integral to a 6,168 m³/day reverse osmosis desalination and ultra-purification plant designed and constructed by WETICO (Riyadh). They will ensure maximum removal of ions capable of promoting corrosion in the Qassim plant’s supercritical steam generators.

Specifically, two skids of four VNX55-EP modules will provide the high level of demineralization efficiency required. Less than 3ppb sodium and chloride is demanded for steam generator feed water at the Qassim II and III sites.

Designed to meet extremely low sodium, chloride and sulfate specifications, along with greater than 95% silica and boron removal, the VNX55-EP module consistently produces a 0,1 µS/cm conductivity (10 Megohm-cm resistivity) measure of product water quality.

In order to further increase boiler corrosion protection, dissolved oxygen is removed downstream of the CEDI modules using Gas Transfer Membrane Deoxygenation (GTMDO) units. The units reduce O2 content to less than 100ppb.

As an Ionpure ‘Master Service Provider’, Pure Water Group, is extremely experienced in supplying high purity and ultrapure water applications featuring CEDI systems and was involved in shaping the requirements of an Enhanced Performance (EP) module, with a wide tolerance for feed water hardness and quality variation, which resulted in the development of Ionpure® VNX55-EP.

Qassim Power Plant serves the people of Buraydah, the capital of Qassim region, in the heart of the Arabian Peninsula. The power plant is being expanded to meet the increasing demand of power in this region through a conversion from simple cycle operation to combined cycle operation. The project will convert 12 oil fired simple cycle combustion turbines to combined cycle operation, increasing generation capacity by approximately 360 MW. The CCGT plant will comprise three blocks of four gas turbine generators, four heat recovery steam generators and one steam turbine generator.

Two skids of four VNX55-EP modules

Qassim Power Plant serves the people of Buraydah, the capital of Qassim region

The Pure Water Group brings together over 25 years of applied knowledge and all-round experience with advanced and sustainable electrochemical separation solutions for pure and clean water production. The latest enhanced performance of the Evoqua modules continue the Pure Water Group tradition to pursue improvements and retain leadership in water purification technology.