Application Cases

In the highly competitive chemical processing industry, efficient sodium chloride triple-effect evaporative crystallizer systems have become the cornerstone of sustainable manufacturing. When a major chemical plant in Southeast Asia faced mounting pressure to reduce operational costs while maintaining strict product purity standards, they turned to CONQINPHI for a customized solution. This case study examines how our sodium chloride evaporative crystallizer technology transformed their production line, delivering measurable results that exceeded expectations.

Dye and pigment manufacturing generates some of the most challenging industrial wastewater streams, particularly when sulfonation reactions produce concentrated sodium sulfate solutions that cannot be discharged without treatment. For a major dye intermediates producer in India, the bottleneck was not chemistry—it was evaporation capacity. Their existing two-effect thermal system, installed in 2015, could process only 4.5 tons per hour of sulfate-laden brine.

Chemical plants handling brine streams face a persistent dilemma: how to recover sodium chloride efficiently without the crippling steam bills associated with traditional multi-effect evaporation. For a chlor-alkali derivative facility in the Middle East, the decision to switch to MVR evaporator crystallizer technology proved transformative. The project centered on a sodium chloride MVR evaporator rated for 6 tons per hour of crystalline salt production—a capacity point where mechanical vapor recompression delivers its strongest economic advantage over thermal alternatives.

The recovery of potassium bromide from industrial wastewater presents a dual challenge: achieving high-purity crystallization while managing concentrated mother liquor that would otherwise become a disposal liability. For a specialty chemical manufacturer in Southeast Asia, the existing potassium bromide triple-effect evaporator had reached its thermal and crystallization limits.

CONQINPHI is a China-based manufacturer of industrial evaporation, crystallization, and drying systems. Headquartered in Qingdao Jiaozhou with a 100,000 m² production base in Xinyang Guangshan, the company specializes in triple effect evaporator technology for high-salinity and corrosive wastewater applications. CONQINPHI provides OEM/ODM services, holds ASME U-stamp certification, and exports to 34 countries including key markets in Southeast Asia, Russia, and Latin America.

A mid-scale chemical manufacturing facility in Liaoning Province, China, faced mounting pressure from stringent environmental regulations and rising wastewater disposal costs. The plant generated approximately 72 cubic meters per day of sodium chloride-rich wastewater from its chlor-alkali and dye intermediate production lines. The wastewater contained 8-12% NaCl, trace organics, and heavy metals, making direct discharge impossible and conventional treatment economically unviable.

In biopharmaceutical production, the processes of fermentation broth concentration, extraction, separation, and purification often generate large quantities of dilute solutions containing salts or active ingredients. These materials are generally characterized by high heat sensitivity, significant batch-to-batch variability, and stringent hygiene requirements. Traditional evaporation methods, due to their high temperatures, high energy consumption, and susceptibility to cross-contamination, are ill-suited to the stringent standards of biopharmaceutical manufacturing.

In industries such as chemical, pharmaceutical, and environmental protection, the evaporation and concentration of sodium chloride-containing wastewater is a crucial step in achieving wastewater reduction and resource recovery. Triple-effect evaporation technology, with its mature reliability, moderate investment, and stable operation, has a broad application base in medium-scale treatment scenarios.

A new energy technology company located in East China primarily engages in the resource recycling of spent power batteries. With capacity expansion, its hydrometallurgical production line generates approximately 120 tons of low-concentration lithium-containing mother liquor daily, containing lithium sulfate, sodium sulfate, and trace amounts of nickel, cobalt, and manganese ions.

High-Efficiency Concentration of Thermosensitive Chemical Wastewater: A 3-Ton/Hour Phosphate-Polyether Polyol Triple-Effect Evaporation System

A large pharmaceutical company generates approximately 50 tons of high-concentration sodium chloride wastewater daily during its active pharmaceutical ingredient (API) production process. This wastewater has a salt content as high as 8%–12% and contains small amounts of organic residues. Direct discharge would cause serious environmental pollution, while traditional treatment methods are energy-intensive and prohibitively expensive to operate. The company urgently needs a high-efficiency, stable, and economical evaporation and crystallization system to achieve resource recovery of sodium chloride and wastewater reduction.

This fine chemical company, located in the Yangtze River Delta Chemical Industrial Park in China, primarily produces pharmaceutical intermediates and specialty acetate esters. During production, it generates approximately 140 tons of dilute acetic acid wastewater daily, with an acetic acid concentration of only 5% to 8%, making direct outsourcing treatment prohibitively costly.

The company's main business is the synthesis of sulfide dyes and organic intermediates. Its hydrogenation reduction and sulfidation reaction processes generate approximately 24 tons of low-concentration sodium hydrosulfide solution daily, with a concentration of only 8% to 12%. Direct transportation for disposal is costly and carries significant transportation risks. To achieve the resource recovery and reuse of sodium hydrosulfide and eliminate the potential for hydrogen sulfide emissions, the company commissioned the construction of a single-effect vacuum evaporation and concentration unit in 2025, with a processing capacity of one ton per hour.

In the fields of fine chemicals, pesticide intermediates, and high-salinity wastewater treatment, the evaporation, concentration, and crystallization recovery of sodium chloride solution are crucial steps in achieving zero wastewater discharge and resource recycling. As one of the most common inorganic salts, the quality of sodium chloride's crystalline product directly impacts its downstream application value, while the energy consumption and stability of the evaporation system are related to the long-term operating costs of enterprises.

Sodium chloride, as a commonly used raw material salt, excipient, or reaction byproduct in pharmaceutical production, is widely present in wastewater from processes such as active pharmaceutical ingredient (API) synthesis, formulation production, and traditional Chinese medicine extraction and concentration. The recovery of sodium chloride from pharmaceutical wastewater not only involves resource reuse but also directly relates to environmental compliance and production cost control.

In the lithium battery industry chain, the evaporation and concentration of lithium sulfate solution and the recovery and treatment of byproducts such as sodium sulfate are crucial links in ensuring lithium salt quality and comprehensive resource utilization.