Clean water and sewage diversion series

(I) Equipment Overview

The Wuji Xuanmiao Integrated Water Purification Unit employs the most advanced, energy-efficient, and effective contemporary water separation technology. It represents a revolutionary water treatment process and falls under the category of high-tech green environmental technology. The equipment consists of the Xuanmiao Core-Membrane and the Wuji Stack. This device combines the advantages of continuous water production, no need for acid-base regeneration, and unattended operation with features such as stable water quality, low operating costs, easy operation and management, and a compact footprint. It can almost completely remove conductive substances and bacteria from water, and also reduce colloidal matter, gases, and organic substances in water to very low levels. It can directly produce pure water and high-purity water to meet the needs of users across various industries and with different requirements.

(II) Working Principle

The Xuanmiao Core-Membrane utilizes the principle of solution osmotic pressure, allowing water molecules and ionized mineral elements to pass through, while the vast majority of inorganic salts, heavy metals, organic matter, as well as bacteria and viruses dissolved in water cannot penetrate it. This strictly separates the permeated pure water from the concentrated reject water. The pores within the Xuanmiao Core-Membrane’s water separator are extremely small, reaching 0.0001 microns. In comparison, viruses typically range from 0.02-0.4 microns, and common bacteria range from 0.4-1 microns in diameter. It allows only water to pass while blocking impurities, effectively separating other substances from water. It can efficiently remove dissolved salts, colloids, microorganisms, and organic matter from water.

The Wuji Stack is a continuous purification process that organically combines electrodialysis and ion exchange. It consists of a certain number of cell pairs housed between two electrodes. Within each cell pair, there are two different types of compartments: diluting (freshwater) compartments and concentrating (brine) compartments. The diluting compartments are filled with a mixed bed of cation and anion exchange resins, situated between two membranes. These resins are continuously regenerated by the direct current applied across the compartments. Ions in the water are attracted to their respective electrodes. As these ions migrate through the ion-exchange resins into the concentrating compartments, they combine to form pure water. These impurity ions are prevented from migrating further towards their corresponding electrodes by the blocking action of the adjacent ion-exchange resins in the neighboring compartments. Consequently, the impurity ions become concentrated in the brine compartments, and this concentrated brine containing the ions can then be discharged from the stack.

(III) Application Fields

1. Advanced treatment of rainwater, river water, and wastewater.
2. Preparation of ultrapure water for the electronics, semiconductor, and precision machinery industries.
3. Purification and preparation of water for the food & beverage industry, drinking pure water, beverages, beer, liquor, health products, etc.
4. Small-scale pure water stations, group drinking pure water systems.
5. Purification and preparation of process water for fine chemicals and advanced scientific disciplines; process water / chemical circulating water for the textile and chemical industries; water for chemical product manufacturing.
6. Pre-desalination treatment for boiler make-up water in power plant chemical water treatment, for high-pressure boilers in thermal power plants, and for medium/low-pressure boiler feed water systems in factories and mines.
7. Water for the pharmaceutical industry: large-volume parenterals, injections, tablets, biochemical products, equipment cleaning, etc.
8. Seawater and brackish water desalination: for islands, ships, offshore drilling platforms, and brackish water regions.
9. Can be used for producing water for bottling, such as bottled water and mineral water.
10. Water for the electronics industry: rinse water for electronic components like integrated circuits, silicon wafers, display tubes, etc.
11. Ultrapure water for automotive and appliance painting, coated glass, cosmetics, fine chemicals, etc.
12. High-purity water preparation required by other industries.

(IV) Equipment Features

• High water flux and high salt rejection rate, typically ≥98% under normal conditions.
• High removal efficiency for organic matter, colloids, particles, bacteria, viruses, pyrogens, etc.
• Low energy consumption, high water utilization rate, operating costs lower than other desalination equipment.
• No phase change occurs during the separation process, ensuring reliable stability.
• Compact equipment size, simple operation, easy maintenance, strong adaptability, and long service life.
• High and stable product water quality.
• Continuous, uninterrupted water production, no downtime for regeneration.
• No chemical regeneration required.
• Thoughtful modular/stackable design, small footprint.
• Simple and safe operation.
• Low operating and maintenance costs.
• No need for acid/alkali storage and transportation.
• Fully automatic operation, no need for dedicated personnel.

(V) Equipment Advantages

• Stable water quality.
• Easy to achieve fully automatic control.
• No停机 due to regeneration.
• No chemical regeneration required.
• Low operating costs.
• Small footprint.
• No wastewater discharge.

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