Bottom-Up Improvement of the Boiler Feedwater System, 2023 PEERS Conference

Traditional boiler water treatment has relied on clarifiers and ion exchange (IX) technologies to produce boiler-grade feedwater makeup. Some plants have chosen to use city water as source water for boiler feedwater demineralization. This paper reviews the efficient use of surface water and reusing cooling tower blowdown by pre-treating surface and waste waters with ultrafiltration and reverse osmosis (UF/RO) ahead of ion exchange to provide higher quality feedwater at lower cost with reduced effluent pollutants (sustainability) instead of just adding mixed ed ion exchange polishers.

A membrane system (UF/RO) as pretreatment of surface water provides high quality feed water to the IX units in terms of water clarity/TDS/TOC and low cost (surface and recycled source) water for DI water production. This high-quality feed water decreases the frequency of backwashes and brine squeezes on cation and anion resins, improving overall regeneration efficiency. Adding UF/RO pretreatment for existing ion exchange systems typically increases the throughput between regenerations by 5 to 10 times the previous throughput while utilizing the existing infrastructure; regen/chemical equipment and existing vessels.

TAPPI conference proceedings and presentations, technical papers, and publication articles provide technical and management data and solutions on topics covering the Pulp, Paper, Tissue, Corrugated Packaging, Flexible Packaging, Nanotechnology and Converting Industries.

Simply select the quantity, add to your cart and your conference paper, presentation or article will be available for immediate download.