Chemical Industrial Reverse Osmosis Equipment Introduction
Chemical industrial reverse osmosis equipment is customized advanced water treatment and separation equipment for the chemical industry. Centered on reverse osmosis membranes, it adapts to the working conditions of chemical production such as corrosion, high pollution and high salinity, and realizes functions including chemical wastewater reuse, process pure water preparation, and material separation and purification. It is the core supporting equipment for water saving and emission reduction, product quality improvement and production cost reduction in chemical production. The equipment mainly consists of pretreatment system, high-pressure pump, reverse osmosis membrane module, membrane cleaning system, control system, pipeline valves and anti-corrosion auxiliary components. The core component is corrosion-resistant reverse osmosis membranes (special chemical membranes such as Dow and Hydranautics), with a pore size of only 0.0001 microns, which can accurately intercept salts, organic matter, colloids, microorganisms and other impurities in water. The whole equipment adopts corrosion-resistant materials such as 316L stainless steel and FRP to adapt to corrosive media like acid, alkali and organic solvents in chemical production. Adopting modular design, it can be flexibly customized according to chemical production scale, ranging from small laboratory equipment to large industrial units, with a treatment capacity from 0.5m³/h to 100m³/h. Equipped with an intelligent PLC control system, it realizes fully automatic operation of feeding, filtration, backwashing, Wastewater discharge and alarm, and supports online monitoring of pressure, flow and water quality, enabling operators to grasp the operating status in real time and meet the demands of continuous chemical production.
Working Principle of Chemical Industrial Reverse Osmosis Equipment
The core working principle relies on the osmosis and reverse osmosis effect. Driven by external high pressure (usually 1.0-4.0MPa, adjustable according to the concentration of chemical feed liquid), the treated liquid such as chemical wastewater, raw water or process liquid is forced to pass through the reverse osmosis membrane. Due to the selective interception of the membrane, only water molecules and a small amount of small molecular substances can pass through to form permeate (pure water, qualified effluent or purified materials). Impurities such as salt ions (chloride ions, sodium ions, etc.), macromolecular organic matter, colloids, heavy metal ions and microorganisms in the feed liquid are intercepted by the membrane surface due to larger particle size, forming concentrated liquid (high-salinity wastewater and impurity concentrate), thus achieving efficient separation of water from impurities and materials from impurities.
In view of the high corrosion and high pollution characteristics of chemical feed liquid, the equipment is matched with targeted pretreatment such as precision filtration, softening, dechlorination and anti-oxidation treatment to prevent corrosion and blockage of membrane modules. Meanwhile, a regular backwashing and chemical cleaning system is configured. Special corrosion-resistant cleaning agents are used to remove intercepted pollutants and scaling on the membrane surface, restore the filtration performance of the membrane, and ensure long-term stable operation of the equipment under complex chemical working conditions.
Advantages of Chemical Industrial Reverse Osmosis Equipment
Strong corrosion resistance, adapted to chemical working conditions: The main body and pipelines are made of corrosion-resistant materials such as 316L stainless steel and FRP, and the membrane modules adopt special chemical corrosion-resistant membranes. They can withstand corrosive media including acid, alkali and organic solvents, avoid equipment damage caused by corrosion, and adapt to the complex environment of chemical production.
High separation precision and stable treatment effect: With accurate pore size of reverse osmosis membranes, the interception rate of salts, heavy metal ions, organic matter and microorganisms can reach over 99%. It can prepare high-purity pure water meeting chemical process requirements (conductivity ≤10μS/cm) or realize advanced treatment of chemical wastewater with stable and qualified effluent quality.
Water saving, emission reduction and cost reduction: It realizes chemical wastewater reuse with a reuse rate of 60%-80%, reducing fresh water consumption and wastewater discharge volume, and lowering Wastewater discharge costs. For material purification scenarios, useful materials can be recycled to improve resource utilization and reduce production costs.
High automation and convenient operation & maintenance: Equipped with an intelligent PLC control system for full-process automatic operation without 24-hour full-time duty. It supports automatic fault alarm and online monitoring with low maintenance workload. Membrane modules can be cleaned and reused repeatedly with long consumable replacement cycles, further reducing operation and maintenance costs.
Low energy consumption, environmental protection and high efficiency: Compared with traditional processes such as distillation and ion exchange, reverse osmosis features low energy consumption without high temperature and high-pressure reaction. No secondary pollution is generated during operation (only concentrated liquid is produced for further treatment or recycling), complying with the environmental protection and emission reduction requirements of the chemical industry.
Strong adaptability and flexible customization: Equipment with different treatment capacities and interception precision can be customized according to different chemical process demands such as pure water preparation, wastewater reuse and material purification, meeting the needs of subdivided fields including chemical industry, fine chemical industry and pharmaceutical chemical industry.
Application Fields of Chemical Industrial Reverse Osmosis Equipment
Chemical industrial reverse osmosis equipment is mainly applied to water treatment, material separation and purification in the chemical industry, covering multiple subdivided fields as follows:
Chemical pure water / ultra-pure water preparation: Used for the preparation of process water, cooling water and boiler water in chemical production, widely applied in fine chemical industry, chemical reagents, chemical fertilizer production and other fields to supply high-purity pure water and guarantee product quality.
Advanced treatment and reuse of chemical wastewater: Treat high-salinity wastewater, organic wastewater and acid-base wastewater generated in chemical production (such as printing and dyeing chemical, coal chemical and petrochemical wastewater), realize wastewater reuse, reduce discharge volume and meet environmental protection emission standards.
Chemical material separation and purification: Applied to the purification of chemical raw materials and intermediates, such as organic solvent recovery, amino acid purification and chemical product concentration, removing impurities and moisture in materials to improve product purity.
Other chemical scenarios: Oily wastewater treatment in petrochemical industry, seawater desalination pretreatment for coastal chemical enterprises, chemical circulating water purification, heavy metal wastewater treatment (electroplating chemical, smelting chemical), etc.
Process Flow of Chemical Industrial Reverse Osmosis Equipment
Chemical Industrial Reverse Osmosis Equipment Process Flow Chart
The process flow is designed according to the characteristics of chemical working conditions, centered on pretreatment – reverse osmosis – cleaning – subsequent treatment. Taking chemical wastewater reuse as an example, the detailed process is as follows:
Pretreatment Stage: Chemical wastewater first enters the pretreatment system, passing through grille (removing large particle impurities and suspended solids), regulating tank (adjusting water quality and quantity, neutralizing acid and alkali, stabilizing inlet water parameters), precision filter (removing colloids and fine impurities to protect reverse osmosis membrane), softening / dechlorination / anti-oxidation device (removing water hardness and residual chlorine to prevent membrane scaling and corrosion), ensuring inlet water meets the operating requirements of reverse osmosis membranes.
High-pressure Reverse Osmosis Stage: The pretreated wastewater is pressurized to the set pressure by a high-pressure pump and sent into the reverse osmosis membrane module. Driven by high pressure, water molecules pass through the reverse osmosis membrane to form permeate (reclaimed wastewater) and flow into the reclaimed water tank. Salts and impurities are intercepted by the membrane to form concentrated liquid (high-salinity wastewater), which is sent to the concentrated liquid treatment unit for further processing such as evaporative crystallization and solidification treatment.
Membrane Cleaning Stage: After a period of operation, pollutants and scaling will accumulate on the membrane surface, resulting in reduced filtration efficiency and increased energy consumption. At this time, the cleaning system is activated: firstly backwashing (flushing the membrane surface reversely with permeate to remove surface dust), then chemical cleaning (circulating cleaning with special corrosion-resistant cleaning agents to remove stubborn scaling and pollutants). After cleaning, the equipment resumes normal operation, and the cleaning wastewater is discharged into the Wastewater treatment system.
Subsequent Treatment and Reuse Stage: According to chemical production demands, the permeate can be further treated by disinfection and pH adjustment. After reaching the production water standard, it can be reused in chemical production for cooling, flushing and process water. After treatment, the concentrated liquid can be discharged up to standard or recycled for resource recovery such as salt recycling, forming a closed-loop treatment system.
For chemical pure water preparation, the process can be simplified as Raw Water Pretreatment – High-pressure Reverse Osmosis – Pure Water Storage – Disinfection and Sterilization to ensure the produced pure water meets chemical process requirements. For material purification, pretreatment and reverse osmosis parameters can be adjusted to realize precise separation and purification of materials.
