Baihuipu Completes Boiler Feed Water Treatment Train

Baihuipu has completed a boiler feed water treatment train for a textile mill in central China, where three package boilers had been losing output to hardness deposits on the heat transfer surfaces. The plant was delivered and commissioned last week. It takes borehole water at up to 280 mg/L hardness as CaCO3 and supplies 15 m3/h of treated water below 5 mg/L hardness and 60 µS/cm conductivity to the deaerator. The train combines multimedia filtration, ion exchange softening, cartridge protection and a single-pass RO stage, arranged so the mill can run softener-only in winter and the full train in peak season.

Key Features and Benefits

Softening and RO Working Together, Not Competing

The borehole feed carries both calcium carbonate and silica, so neither softening nor membranes alone would have covered the whole duty. The softener removes the bulk of the hardness and protects the RO from carbonate scaling, while the RO strips dissolved salts that the softener passes straight through. A related discussion worth reading here is Baihuipu Expands Overseas After-Sales Spare Parts Service.

We set out the wider process route in condensate polishing system.

Arranging them in series also gives the station a fallback. When the RO is offline for cleaning or membrane replacement, the softened water still meets the boiler limit for a limited period at reduced cycles, which keeps the dye house steam supply running. The process logic sits close to what is described in baihuipu commissions second train at coastal desalination plant, particularly on the pretreatment side.

Design to the Worst Month, Not the Average Sample

The mill supplied one borehole analysis with the enquiry. We asked for three more across the wet and dry seasons before fixing the design, and hardness came back between 230 and 285 mg/L depending on the month. The softener vessel sizing and the RO recovery were set against the 285 figure, not the average. We have written about the downstream implications separately in Baihuipu Commissions Food Wastewater Anaerobic Reactor.

That decision cost a little in capital and saved a season of grief: a softener sized for the average would have exhausted early every autumn, and the operators would have learned to distrust the conductivity alarm instead of the resin.

A Handover the Boiler Attendant Can Operate

The panel logs softener throughput, differential pressure across the filters, RO permeate conductivity and salt passage every shift. Hardness tests at the treated water outlet are written on a laminated card next to the sample point, because the titration kit is only useful if someone actually picks it up.

Operators were trained on regeneration sequencing, cartridge changes and what a rising salt passage trend means. As-built drawings, the resin specification and a cleaning procedure for the membranes were handed over with a two-year spares list.

Technical Specifications

Feed and treated water figures at the textile mill, measured during the 72-hour performance run:

Why Choose Baihuipu as Your Manufacturer

Choosing a manufacturer here comes down to one question: who is still accountable once the commissioning team flies home. Our answer is that we build and programme our own equipment, then stand behind it for the life of the plant.

Manufacturing Base in Guangdong

Owned production lines mean we control tolerances, materials and delivery. Standard modular units and bespoke skids are both built by our own people, so schedule commitments are ours to keep.

20+ Years Across Dozens of Industries

Experience matters most when your waste stream behaves nothing like the textbook example. We have dealt with toxic organics, heavy metals, extreme salinity and refractory COD in food processing, chemical manufacturing, electroplating, mining and municipal projects.

Complete Units and Turnkey Plants

Whether you need a single package unit or a turnkey installation with civil works, we deliver the entire treatment scheme. Our engineering team covers process, mechanical, electrical and automation so one party owns the outcome.

After the Handover

Spares for everything we install are held in stock. Remote telemetry is available on most systems, and our service engineers commission, train your operators and turn out for emergencies.

Getting Started

Send us a water analysis and your production profile and we will tell you honestly what the process should look like and roughly what it costs to build and run. Reach our engineering team on WhatsApp: +86 13631765076 or via hkbhp.com.

WhatsApp: +86 13631765076

Customer FAQs

When does a boiler feed water treatment plant need RO as well as softening?

When the boiler pressure and cycles of concentration demand lower dissolved solids than softening alone can deliver, or when silica sits close to the blowdown limit. A softener handles hardness; it does not remove chloride, sodium or bicarbonate.

Can the treated water go straight to the boiler drum?

No. Boilers also need deaeration and, on most systems, an oxygen scavenger dosed after the storage tank. The treatment plant delivers water chemistry; the boiler side manages oxygen and internal treatment.

How often does the softener regenerate?

At this site, roughly every 26 hours at full flow with the measured feed hardness. The controller meters treated volume rather than time, so regeneration follows actual demand instead of a fixed clock.

What does the RO stage add to running cost?

Mainly membrane replacement every three to five years, antiscalant, cartridge filters and cleaning chemicals, plus the concentrate that has to go to drain. The softener salt consumption drops slightly because the RO removes part of the hardness upstream. The operating detail behind this sits in cooling tower cycles of concentration.

Readers planning similar projects often also read Baihuipu Publishes Desalination Energy Cost Benchmark and Fine Chemical Batch Plants system for the process detail behind these systems.