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Shanghai Binrun Environmental Protection Technology Co., Ltd
Yinchuan 4 tons/hour dual stage reverse osmosis EDI purified water
NegotiableUpdate on 05/06
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Overview
In the fields of industrial production and scientific research experiments, the requirements for the quality of purified water are becoming increasingly stringent, which has led to its emergence. The Yinchuan 4-ton/hour dual stage reverse osmosis EDI purified water equipment is designed and manufactured with advanced water treatment technology as its core, strictly following domestic and international standards such as the Chinese Pharmacopoeia, GMP, FDA, ISO, etc. Through a complete process chain of "pretreatment dual stage reverse osmosis EDI deep desalination post-treatment", it achieves deep purification of raw water and stable output of purified water that meets the high standard requirements of industries such as pharmaceuticals, electronics, and healthcare.
Product Details
In the fields of industrial production and scientific research experiments, the requirements for the quality of purified water are becoming increasingly stringent, which has led to its emergence.Yinchuan 4 tons/hour dual stage reverse osmosis EDI purified waterThe equipment is designed and manufactured with advanced water treatment technology as its core, strictly following the Chinese Pharmacopoeia and domestic and international standards such as GMP, FDA, ISO, etc. Through a complete process chain of "pretreatment dual stage reverse osmosis EDI deep desalination post-treatment", it achieves deep purification of raw water and stable output of purified water that meets the high standard requirements of industries such as pharmaceuticals, electronics, and healthcare. The following will provide a detailed explanation from the aspects of core processes, technical features, and application scenarios.
1、 Core process flow: Precise purification to ensure water quality meets standards
（1） Pre treatment system: the primary defense line for raw water purification
As the starting point of the entire process, the pretreatment system undertakes the important task of removing suspended solids, organic matter, residual chlorine, hardness substances, and microorganisms from raw water, providing high-quality influent for subsequent core treatment units, effectively protecting RO membrane elements, and extending the service life of EDI modules.
Multi media filterThe multimedia filter adopts a layered packing structure inside, with the upper layer being quartz sand with a particle size of 0.5-1.2mm, used to intercept small particles; The lower layer is smokeless coal with a particle size of 1-2mm, responsible for removing larger particle impurities. When the raw water passes through the filter layer from top to bottom, the interception, sedimentation, and adsorption of the filter material can effectively remove sediment, colloids, suspended solids, etc. from the water, resulting in a suspended solids (SS) content of ≤ 3 ppm in the effluent, significantly reducing the turbidity of the raw water and reducing the load for subsequent treatment.
Activated carbon filterUsing high-quality coconut shell activated carbon filling, its rich microporous structure and high specific surface area of 1000-1500m ²/g endow it with excellent adsorption performance. On the one hand, activated carbon converts highly oxidizing residual chlorine into harmless chloride ions through catalytic reduction, ensuring that the residual chlorine content in the effluent is almost zero and preventing residual chlorine from causing oxidative damage to the RO membrane; On the other hand, it can efficiently adsorb organic matter in water, making the total organic carbon (TOC) in the effluent ≤ 0.5 ppm, reducing the interference of organic matter on subsequent processes.
Softener (optional)When the hardness of the raw water is greater than 0.1 mmol/L, a softener needs to be configured. The softener is filled with strong acidic cation exchange resin, which replaces calcium and magnesium ions in water with sodium ions in the resin through ion exchange reaction, effectively reducing the hardness of water. After softening treatment, the concentration of calcium and magnesium ions in the water is significantly reduced, and the hardness is ≤ 0.1 mmol/L. This avoids the formation of scale on the surface of the RO membrane and ensures the stable operation of the reverse osmosis system.
precision filterUsing a 5 μ m pore size polypropylene (PP) melt blown filter element, it can intercept residual small particles and impurities during the pretreatment process, such as broken filter media, flocs, etc., providing the last protective barrier for the RO system, preventing particles from scratching the surface of the RO membrane, and ensuring efficient and stable operation of the RO membrane.
（2） Dual stage reverse osmosis (RO) system: the core unit of deep desalination
The two-stage reverse osmosis system is a key step in achieving deep desalination of raw water. Through two-stage reverse osmosis treatment, the salt and impurity content in the water is gradually reduced, providing high-quality influent for the EDI module.
First level RO
Function and principleThe main function of primary RO is to remove most of the salt and impurities in the raw water, with a desalination rate of ≥ 95%, effectively reducing the treatment load of secondary RO. Its working principle is that under the pressure of 0.8-1.5MPa provided by the high-pressure pump, the raw water passes through the RO membrane, and water molecules selectively permeate through the membrane, while impurities such as salt, organic matter, and bacteria are intercepted, thus achieving preliminary desalination.
Device ConfigurationHigh pressure pumps made of 316L stainless steel are selected to ensure stable operation and corrosion resistance in high-pressure environments; Paired with four 40 inch Dow BW30-400IG DRY membrane elements, this membrane exhibits excellent anti fouling performance and high desalination rate, with a single membrane desalination rate of ≥ 99.5% (test conditions: 25 ℃, 1500ppm NaCl solution).
Recovery rate controlThe recovery rate of primary RO can be flexibly adjusted according to the TDS (total dissolved solids) of the raw water, usually controlled between 60-75%. By optimizing the ratio of concentrated water discharge and fresh water collection, while ensuring the quality of water production, we aim to maximize water resource utilization and reduce wastewater discharge.
Secondary RO
Function and principleThe secondary RO further desalinates the water produced by the primary RO to remove residual trace salts and impurities, resulting in a water resistance rate of ≥ 10 M Ω· cm, providing high-quality influent for EDI treatment. Its principle is the same as that of first stage RO, but by selecting membrane elements with better desalination performance and optimizing operating parameters, higher desalination efficiency can be achieved.
Device ConfigurationUsing a low-pressure pump to reduce energy consumption, coupled with four 40 inch Dow TW30-1812 membrane elements, it operates in series with the first stage RO water production to further improve water quality.
Process advantageCompared to single-stage reverse osmosis, the two-stage RO design can more effectively remove salt and impurities from water, reduce the processing load of EDI modules, extend the service life of EDI, and ensure that the water quality of the produced water is stable and meets higher standards.
（3） EDI Electrodeionization Module: Key Technology for Deep Desalination
The EDI module is the core component for achieving high purity of purified water. Through the synergistic effect of electrodialysis and ion exchange resin, it replaces traditional mixed bed processes and achieves continuous deep desalination.
working principleUnder the action of a direct current electric field, the ion exchange resin in the EDI module adsorbs cations and anions in water, while the selective permeability of the ion exchange membrane enables directional migration of ions from the fresh water chamber to the concentrated water chamber, achieving deep desalination. This process does not require acid-base chemical regeneration. The resin is continuously regenerated by hydrogen ions (H ⁺) and hydroxide ions (OH ⁻) generated by water electrolysis, which not only reduces operating costs and environmental pollution, but also stably produces high-purity purified water with conductivity ≤ 0.1 μ S/cm and resistivity ≥ 15 M Ω· cm, while controlling TOC ≤ 5 ppb.
Device ConfigurationSelect mature brand EDI modules and use dedicated rectifier power supplies to provide stable DC electric fields for the modules; Equipped with high-precision resistivity online monitoring instruments, real-time monitoring of water production resistivity to ensure stable and compliant water quality.
（4） Post treatment system: the final guarantee for water quality improvement
UV sterilizerUsing a low-pressure mercury lamp with a wavelength of 254nm, the lamp power is precisely configured according to the flow rate (10-15 W power is required for processing 1m ³/h of water), ensuring that the ultraviolet radiation dose of the water flow in the equipment is ≥ 40mJ/cm ². Ultraviolet radiation destroys the DNA or RNA structure of microorganisms, causing them to lose their ability to reproduce and survive. The sterilization rate is greater than 99.9%, effectively killing residual bacteria, viruses, and other microorganisms in water, and reducing the microbial content in the effluent to less than 10 CFU/mL.
Degassing tower (optional)For application scenarios that require high levels of non condensable gases in water, a degassing tower can be configured. By using physical or chemical methods, remove non condensable gases such as CO ₂ from water to achieve a gas content of ≤ 3 ppm, avoiding the impact of gases on subsequent processes or product quality.
Terminal precision filteringInstall a 0.22 μ m microporous filter membrane to perform final filtration on the purified water treated as described above, intercepting small particles, impurities, bacteria, and microbial fragments that may remain in the water, ensuring that the final effluent particle content is less than 1 ppt and meets the purity standard.
（5） Storage and Distribution System: Ensuring Safe and Stable Water Use
Pure water storage tankMade of 316L stainless steel material, the inner wall is polished to Ra ≤ 0.4 μ m, effectively preventing microbial adhesion and material corrosion. The storage tank is equipped with a respirator and filled with high-efficiency filtering materials to filter out microorganisms and particulate impurities in the air, preventing external pollution from entering the tank and ensuring stable quality of purified water during storage.
Circulating conveying pipelineChoose sanitary grade materials such as 316L stainless steel or PVDF pipes, which have excellent chemical stability and anti pollution performance, and can avoid secondary pollution of purified water caused by dissolved substances in the pipes. The pipeline design adopts a structure without blind pipes to ensure smooth water flow. At the same time, a circulating pump is set up to drive purified water to circulate in the pipeline at a flow rate of ≥ 1.2m/s, avoiding the formation of stagnant water areas in the pipeline and preventing microbial growth.
3、 Equipment configuration and cost analysis: precise planning of investment and operation
（1） Core Equipment List
Preprocessing systemIncluding multi-media filters, activated carbon filters, softeners (optional), precision filters, all devices work together to achieve preliminary purification and protection of raw water.
RO systemComposed of a first stage RO (high-pressure pump+membrane group) and a second stage RO (low-pressure pump+membrane group), deep desalination is achieved through two-stage reverse osmosis, equipped with online conductivity instruments for real-time monitoring of water quality.
EDI unitIncluding EDI module, rectifier power supply, and resistivity online monitoring device, it is a key part to achieve high-purity water production.
post-processing systemCovering UV sterilizers, degassing towers (optional), and 0.22 μ m terminal filters to further improve water quality and ensure meeting the needs of different application scenarios.
Storage and transportation systemComposed of 316L stainless steel pure water storage tanks and circulating pipelines, it ensures the stable quality of purified water during storage and transportation.
（2） Operating cost analysis
Cost of consumables replacement
RO membraneThe service life is 3-5 years, and the replacement cost is about 50000 to 80000 yuan per set. The average annual consumable cost is about 10000 to 27000 yuan.
EDI moduleThe service life is 5-8 years, the replacement cost is about 100000-150000 yuan/set, and the average annual consumable cost is about 12500-30000 yuan.
UV lamp tubeIt needs to be replaced once a year, with a cost of about 0.1 yuan/ton. Calculated based on a water production rate of 4 tons/hour and 8 hours of operation per day, the cost of replacing the lamp tube is about 1168 yuan per year.
energy consumption costThe comprehensive energy consumption of the equipment is about 2-3 yuan/ton, mainly including the power consumption of high-pressure pumps, low-pressure pumps, EDI modules, UV sterilizers and other equipment. The annual operating cost (calculated based on 8 hours of operation per day and 300 days per year) is about 28800 to 43200 yuan.
Total cost estimationTaking into account factors such as consumable replacement, energy consumption, and equipment depreciation, the total cost of purified water production is approximately 3-5 yuan/ton. The specific cost can be adjusted based on actual operating conditions and raw water quality.
4、 Technological Advantage: Technological Innovation and Development
Efficient and StableThe combination process of two-stage RO+EDI can more efficiently remove salt and impurities from water compared to traditional ion exchange processes, producing purified water with a water resistance rate of ≥ 15 M Ω· cm and more stable and reliable water quality, meeting the strict requirements of the industry for water quality.
environmental protection and energy conservationEDI technology does not require acid-base chemical regeneration, reducing the use of acid-base reagents and wastewater discharge, and lowering environmental pollution; Meanwhile, the energy consumption of EDI is only 50% of that of traditional mixed beds, effectively reducing operating costs and in line with the development trend of energy conservation and environmental protection.
High degree of automationAdopting PLC+HMI (Human Machine Interface) system integrated control to achieve automated monitoring and control of the entire equipment operation process. The system can monitor conductivity in real-time TOC、 Parameters such as pressure and flow rate will automatically sound an alarm in case of any abnormalities, and support data recording and remote monitoring functions, making it convenient for operators to monitor the equipment's operating status anytime and anywhere, reducing manual intervention and improving management efficiency.
flexible expansionThe device adopts a modular design, with each processing unit independent and closely coordinated with each other. Users can flexibly increase water production or upgrade post-treatment units (such as adding polishing mixed beds to improve water quality) according to actual production needs, without the need for large-scale system transformation, with good scalability and adaptability.
5、 Application scenario: Widely adaptable to the needs of various industries
pharmaceutical industrySuitable for sterile preparation production, raw material refining, medical device cleaning, and other processes, high-purity, sterile, and pyrogen free purified water can ensure drug quality and safety, meeting the strict requirements of GMP for pharmaceutical water.
electronics industryIn the fields of semiconductor chip manufacturing, liquid crystal display (LCD) production, photovoltaic manufacturing, etc., it is used for cleaning, etching, dilution and other processes. High precision water quality can avoid impurities from polluting precision electronic devices and improve product yield.
medical fieldIt can be used as blood dialysis water and laboratory ultrapure water to ensure the safety of medical processes and the accuracy of experimental results, providing reliable support for medical research and clinical treatment.
Chemical/Food IndustryUsed for high-precision chemical preparation, sterile packaging cleaning, etc., to ensure stable product quality and meet food hygiene standards and chemical production process requirements.
6、 Attention: Ensure stable operation of equipment
Response to fluctuations in raw water qualityIf the TDS of the raw water is greater than 300 ppm or the hardness is high, it is necessary to increase the treatment capacity of the softener or strengthen the pretreatment process, such as increasing the adsorption capacity of the activated carbon filter, optimizing the filter material grading of the multi-media filter, etc., to ensure that the inlet water quality of the RO system meets the requirements.
Microbial controlWhen the equipment is shut down for a long time, the entire system needs to be thoroughly disinfected. Ozone disinfection or high-temperature cycling can be used to kill residual microorganisms in the system and prevent them from breeding and affecting the water quality after restarting.
Verification requirementsTo ensure the continuous and stable production of qualified purified water by the equipment, regular DQ (design confirmation), OQ (operation confirmation), and PQ (performance confirmation) verifications are required to comprehensively evaluate the design, installation, operation, and performance of the equipment, ensuring that it meets relevant regulations and standards, and providing strong support for the enterprise's quality management system.
The Yinchuan 4-ton/hour dual stage reverse osmosis EDI purified water equipment provides high-quality purified water solutions for various industries with its advanced process technology, reliable performance indicators, wide application scenarios, and * service system. Whether it is pharmaceutical companies that require water quality or electronic manufacturers that pursue high precision, this equipment can meet production needs with stable performance, help enterprises improve product quality, enhance market competitiveness, and promote high-quality development of the industry.
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