Efficient Mother Liquor Drying System for Industrial Wastewater Management

• Customization: Available
• After-sales Service: 7*24h
• Warranty: 1year
• Model NO.: KJH-ML-5172
• Type: Crystallizer
• Method: Combined Treatment
• Usage: Industrial
• Product Name: Mother Liquor Drying System
• Material: Titanium/Stainless/Carbon Steel
• Power: 138kw/H
• Process Flow Direction: Downstream/ Countercurrent/ Crosscurrent
• Delivery Time: 100day
• Function: Evaporation, Concentration, Crystallization
• Installation Cycle: 30days
• Debugging Cycle: 7days
• Features: Energy Saving
• Transport Package: Plastic Film and Wooden Boxes
• Specification: ≥3x3x2m
• Trademark: conqinphi
• Origin: Qingdao, China
• Production Capacity: 120 Sets/Year
• Package Size: 60.00cm * 60.00cm * 50.00cm
• Package Gross Weight: 37800.000kg

Product Description

1.Mother liquor drying system

The mother liquor drying system is a crucial end-of-pipe equipment in modern industry for achieving "zero discharge" and resource recovery of high-salt, high-COD, and highly toxic mother liquor. It is widely used in industries such as chemical, pharmaceutical, pesticide, dye, lithium battery, and metallurgy. The system's core concept is "reduction—harmlessness—resource recovery." Through a complete chain integration of "pretreatment—concentration—drying—tail gas treatment—salt recovery," it transforms mother liquor with a water content of over 90% into dry crystals or granules with a water content of <5% in one step. Simultaneously, it recovers condensate and by-product salt, completely solving the problems of large footprint, strong odor, and secondary pollution associated with traditional evaporation ponds, centrifugal drying, or rake drying.

Small Footprint	The integrated evaporation and drying frame layout allows for a mother liquor production capacity of 10,000 tons per unit area of<500 m², saving 90% compared to traditional drying yards.
Low Energy Consumption	Multi-stage heat recovery reduces system steam consumption to <0.12 t·t-¹ water and overall electricity consumption to <45 kWh·t^-¹ water, achieving 55% energy savings compared to a single-effect evaporation + centrifugal + rake drying combination.
High Automation	PLC + touchscreen + cloud monitoring enables one-button start/stop, remote diagnostics, and unattended operation.
Thorough Corrosion Protection	Surfaces in contact with moisture are made of 2205, 2507, 904L, or titanium; the drying section is lined with silicon carbide, ensuring a lifespan of >10 years
Safety and Environmental Protection	The entire system operates under closed, slightly negative pressure, eliminating odor escape. The dryer features inertial protection with an oxygen content of <3%, a dust concentration of <20 g·m-³, and is equipped with rupture discs and explosion-proof valves, meeting GB 50058 dust explosion-proof requirements.

2.Mother liquor drying system Typical Applications

1.High-Salt Mother Liquor in Chemical Industrial Parks:A pesticide company processes 300 tons of mother liquor containing 12% salt daily using a "triple-effect forced circulation + MVR + paddle-drum drying" route, producing 28 tons of NaCl per day. The condensate COD is <30 mg/L, and all is reused, saving 12 million yuan in annual wastewater discharge fees.

2.Pharmaceutical Antibiotic Mother Liquor: Through advanced oxidation, double-effect evaporation, and disc drying, sodium acetate byproduct is recovered. The dryer outlet has 2% water content, and the tail gas VOCs are <20 mg/m³, achieving an odorless finish.

3.Lithium-ion Battery Cathode Material Mother Liquor:Contains sodium sulfate, ammonium sulfate, and trace heavy metals. After drying, the salt particle size is adjustable, and the heavy metals are solidified in the crystal lattice, meeting the HJ 1091 hazardous waste identification standard. The salt can be sold as a glass flux.

Forced Circulation Evaporator:

MVR Evaporator: 

Triple-Effect Evaporation Crystallizer:

This uses a pump's powerful circulation action to force wastewater through the heating tubes at a high velocity, making it suitable for treating high-viscosity, scaling-prone wastewater.

This utilizes mechanical vapor recompression technology to compress and heat secondary steam, which serves as a heating source, significantly improving thermal energy efficiency.

This utilizes multiple-effect evaporation technology to utilize secondary steam generated in the first effect as a heat source in the next effect, reducing steam consumption.

3.Selection and Maintenance Key Points

1. For high-boiling-point elevation (>15℃) or mother liquor containing crystals, forced circulation evaporators are preferred. The final-effect dryer should ideally be equipped with an integrated crushing and screening system to prevent agglomeration.

2. The dryer should preferentially use secondary steam from the evaporation section as the heat source. Supplement with live steam or heat transfer oil if necessary. Installing heat pipes for waste heat recovery can reduce the exhaust gas temperature to 90℃.

3. Regularly remove scale from the evaporator tubes using an "alkali washing + acid washing + high-pressure water jet" method. Monitor the concentration endpoint with an online conductivity meter to avoid oversaturation and tube blockage.

4. Establish a three-in-one KPI assessment system encompassing "salt quality, exhaust gas indicators, and energy consumption." Conduct quarterly toxicity leaching tests on the dried salt to ensure compliance with GB 5085.3.

4.Summarize

Summary The mother liquor drying system takes "evaporation + drying" coupling as its core, integrates pretreatment, tail gas treatment and salt recovery, and forms a complete solution with small footprint, low energy consumption and high automation. It can convert high salt and difficult-to-degrade mother liquor into dry granules and reclaimed water, achieving the dual goals of zero wastewater discharge and salt resource utilization. It has become a standard technology for green upgrading in industries such as chemical and pharmaceutical.

Company Profile

Multiple-effect evaporator manufacture-Qingdao Conqinphi Environmental Technology Group Co., Ltd. 

Qingdao Conqinphi Environmental Technology Group Co., Ltd. is a system integration manufacturer specializing in the evaporation and concentration of high-salinity wastewater. Conqinphi boasts its own 90,000 square meter processing plant and employs hundreds of people. It is a research and development-focused technology enterprise.

Conqinphi's main products include MVR evaporators, multi-effect evaporators (primarily triple-effect evaporators, quadruple-effect evaporators, double quadruple-effect evaporators, and double-effect MVR evaporators), zero-discharge industrial wastewater systems, plate and tubular heat exchangers, crystallizers, mother liquor treatment systems, and other wastewater treatment equipment. With a wide range of products, Conqinphi primarily provides clients with systematic equipment solutions, manufacturing, processing, installing, and commissioning equipment to help them address the evaporation and concentration challenges of high-COD and high-salinity wastewater. Conqinphi's multi-effect evaporators offer low investment, high treatment efficiency, low operating costs, and stable and reliable system operation. They are widely used for evaporation, concentration, and crystallization of high-salinity industrial wastewater in the petrochemical, metallurgical, pharmaceutical, fine chemical, papermaking, printing and dyeing, food processing, jam and juice concentration, seawater desalination, electroplating, rubber additive, epoxy resin, lithium battery, and desulfurization industries.

Conqinphi serves thousands of clients, providing them with systematic industrial wastewater solutions and saving them from wastewater treatment challenges.