5 TPH Sodium Bromide Triple-Effect Evaporator Upgrade: How CONQINPHI Helped a Chemical Plant Boost Recovery by 40%

The global chemical industry faces mounting pressure to treat bromide-containing wastewater efficiently while recovering valuable salts. For one mid-sized chemical plant in East Asia, the challenge was clear: their existing triple-effect evaporator could no longer keep pace with rising production demands. The facility needed an evaporator upgrade that would increase hourly throughput without compromising crystal quality or energy efficiency. This case study details how CONQINPHI engineered a precision evaporator capacity expansion that transformed a bottlenecked system into a high-performance recovery line.

When the plant first approached CONQINPHI, their triple-effect evaporator was rated for 3.5 tons per hour of sodium bromide feed. Rising orders had pushed actual demand to nearly 5 TPH, forcing operators to run the system beyond design limits. The result was predictable—frequent scaling, unstable vacuum levels, and product purity hovering below commercial-grade standards. Management knew that a simple capacity boost would not suffice; they needed a comprehensive evaporator revamp that addressed thermal balance, crystallization kinetics, and automated process control.

Project Overview: From Bottleneck to Breakthrough

The facility processes sodium bromide wastewater generated during bromination reactions. Prior to the evaporator upgrade, the plant relied on a forced-circulation triple-effect system installed in 2017. While mechanically sound, the unit suffered from three critical limitations:

• Undersized final-effect heating surface, causing excessive temperature differences and accelerated fouling

• Legacy control logic that could not adapt to fluctuating feed concentrations

• Outdated crystallizer geometry that limited solid-liquid separation efficiency

CONQINPHI’s engineering team conducted a full thermal audit, measuring steam consumption, vapor velocities, and mother liquor densities across all three effects. The data revealed that the first effect was actually over-designed for the original duty, while the third effect was the true constraint. This insight shaped a targeted evaporator capacity expansion strategy rather than a costly full replacement.

Engineering Solution: Precision Upgrades, Maximum Impact

H2: Heating Surface Reconfiguration

The core of the evaporator revamp involved redistributing heating surface area across the three effects. CONQINPHI added 28% additional tube surface to the third effect while slightly reducing the first-effect load. This rebalancing lowered the overall temperature gradient, reduced scaling rates by an estimated 35%, and allowed the system to reach the target 5 TPH sodium bromide processing capacity without increasing live steam consumption.

H2: Crystallizer Redesign

Sodium bromide crystallization demands tight control over supersaturation. The original draft-tube baffle (DTB) crystallizer produced irregular crystal size distributions, complicating downstream centrifugation. CONQINPHI replaced the internal baffle geometry and introduced a fines dissolution loop. Post-evaporator upgrade sampling showed a dramatic shift: mean crystal size increased from 0.4 mm to 0.8 mm, with coefficient of variation dropping from 52% to 28%. Dryer downstream reported 15% lower moisture content in the final product.

H2: Smart Control Integration

A modern DCS replaced the legacy PLC, enabling real-time density tracking and automatic feed-forward compensation. Operators now monitor key parameters through a centralized HMI, with trend alarms for early scaling detection. The evaporator capacity expansion included predictive cleaning schedules based on actual heat-transfer coefficient degradation, not fixed calendar intervals.

Results: Measurable Performance Gains

The triple-effect evaporator now operates as the plant’s most reliable unit. Maintenance cycles extended from 21 days to 45 days, and the improved crystal morphology reduced packaging losses. For a facility running 7,200 hours annually, the evaporator revamp paid back in under 14 months through increased throughput alone.

Why CONQINPHI Delivers Proven Results

H2: Dual-Base Manufacturing Strength

CONQINPHI operates two dedicated production facilities: Xinyang, Henan and Jiaozhou, Qingdao. The Xinyang plant specializes in large-scale pressure vessel fabrication and titanium cladding, while the Jiaozhou facility focuses on precision crystallizer internals and automated skids. This dual-base structure ensures redundant capacity, faster lead times, and flexible resource allocation for complex evaporator upgrade projects.

H2: OEM & ODM Expertise

With over 200 completed evaporation systems across chemical, pharmaceutical, and food sectors, CONQINPHI provides full OEM and ODM services. Our in-house thermal simulation team uses proprietary algorithms to model multi-effect systems before fabrication, eliminating guesswork from evaporator capacity expansion designs.

H2: Global Export Experience

CONQINPHI has shipped evaporator revamp components and complete systems to Southeast Asia, the Middle East, Africa, and Latin America. Our project engineers understand regional standards—from Russia to Saudi Arabia—and coordinate logistics for oversized pressure vessels. Post-installation, remote commissioning support ensures your triple-effect evaporator reaches design performance without costly travel delays.

Is Your Evaporator Hitting Its Limit?

If your bromide-containing wastewater system is constraining production, a targeted evaporator upgrade may deliver faster returns than full replacement. CONQINPHI’s thermal audit service identifies bottlenecks in existing multi-effect trains and provides fixed-price proposals for evaporator capacity expansion.

Request a free technical assessment today. Share your current feed rate, product specifications, and utility costs—our engineers will model optimized scenarios and deliver a feasibility report within 72 hours.