Baihuipu Completes High-Salinity Brine Minimization Project

Baihuipu has completed a brine minimization project at a chemical works in East China, where the existing RO plant produced roughly 25 m3 per day of concentrate that the site was paying to have tankered away. The new line adds a further RO concentration stage on that stream and sends the reduced volume to an MVR evaporator, with the condensate returned to the cooling water system. Liquid discharge for off-site disposal has fallen to about 3 m3 per day, and the site now holds the salt cake in a lined store pending a reuse outlet.

Key Features and Benefits

Concentrate the Brine Before Boiling It

Every cubic metre kept out of the evaporator saves both capital and running steam or power. The added RO stage runs at high pressure with open-channel modules because the feed already sits near scaling limits and carries residual organics from the upstream process. Plants dealing with comparable loads face many of the same trade-offs covered in Baihuipu Puts Textile Water Reuse System Into Operation system.

We set out the wider process route in island water supply EPC.

Feed analysis drove the recovery target. Calcium, sulphate, silica and COD were each checked against the concentration factor, with a cleaning and antiscalant regime agreed before fabrication rather than tuned during commissioning. Much of this mirrors the situation set out in Baihuipu Showcases Water Treatment Systems at Industry Expo.

An Evaporator Sized for the Remaining Load

Because the RO stage removed most of the water first, the MVR evaporator is a compact unit instead of the large vessel the original enquiry assumed. The compressor and heat exchanger were selected for the measured brine boiling point elevation, which shifts noticeably at this salt concentration. Where several streams need joint treatment, Baihuipu Commissions Food Wastewater Anaerobic Reactor is the more detailed reference.

Condensate is polished and returned to cooling make-up. That was the client requirement from the first meeting, so conductivity and organic carryover were written into the acceptance test rather than treated as optional extras.

What the Site Still Has to Manage

Brine minimization reduces volume; it does not make the salt disappear. The residual mother liquor and the salt cake still need a route, whether that is a crystallizer, a licensed disposal contractor or a reuse outlet in another process. We state that plainly at proposal stage.

The plant also needs a cleaning regime for the high-pressure RO stage and a plan for evaporator washouts. The handover pack includes both, with the intervals based on the first three months of operating data.

Technical Specifications

Measured volumes before and after the additional concentration stage:

Why Choose Baihuipu as Your Manufacturer

Two decades in this industry teaches you that most treatment problems are procurement problems in disguise. Someone bought the cheapest skid, nobody checked the equalisation volume, and eighteen months on the plant cannot hold its consent limit. We build differently.

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.

Two Decades of Field Data

Food and beverage, chemicals, electroplating, textile dyeing, mining, municipal work — we have commissioned across all of them. The useful part is not the project count, it is having seen how plants fail in year seven and designing those failures out.

We Engineer the Whole Train

Screening, equalisation, biological or chemical treatment, membranes, evaporation, brine handling — the complete line comes from one organisation. Process design, mechanical, electrical and PLC programming sit under the same roof, so there is no gap for finger-pointing at handover.

Spares, Service and Commissioning

Membranes, dosing pumps, diffusers, instrumentation and blowers are stocked for the systems we sell. Our control systems support remote diagnostics, and we can put an engineer on site for commissioning, training or an unplanned shutdown.

Let's Look at Your Numbers

Share your water analysis and site constraints and we will give you a straight assessment of the process route and the realistic operating cost before you commit to anything. Contact our engineers at WhatsApp: +86 13631765076, or find us at hkbhp.com.

WhatsApp: +86 13631765076

Customer FAQs

Does brine minimization remove the need for disposal?

No. It cuts the liquid volume substantially, but the dissolved salt ends up as a concentrated liquor or solid. A disposal or reuse route is still required, and it should be settled before equipment is ordered.

Why add another RO stage instead of going straight to evaporation?

Membranes move water with far less energy than a phase change. Taking the brine as far as scaling limits sensibly allow before boiling it usually gives the lowest total cost, especially on a base-load plant.

Can condensate be reused in cooling towers?

Yes, if the condensate quality is specified up front. Volatile organics and ammonia can carry over, so a polishing step and conductivity monitoring are part of the design when the water returns to a cooling system.

What limits the recovery of the extra RO stage?

Scaling salts, silica and osmotic pressure. We work from the full concentrate analysis and set recovery with a margin for seasonal variation, which is more reliable than chasing the highest possible number. The operating detail behind this sits in ultrafiltration pretreatment.

For adjacent technical angles, Baihuipu Signs Overseas EPC Wastewater Plant Contract and Baihuipu Expands Evaporation Crystallization Production covers the same equipment from a different duty.