Ultrapure water equipment for cleaning optical lenses. During the manufacturing process, the surface of optical lenses may adhere to solvents, chemical solutions, etc., which require cleaning. The configuration of reverse osmosis + EDI ensures the water quality of the equipment, meeting the requirements for cleaning water. Detailed introduction to Yayun Company's ultrapure water equipment. Generally, the water produced by a two-stage reverse osmosis system is fed into the EDI ultrapure water system. The main portion flows into the resin/membrane interior, while another portion flows along the outside of the membrane plate to wash away ions that have permeated out of the membrane. The resin traps dissolved ions in the water, and under the action of electrodes, the trapped anions move toward the positive electrode, and cations move toward the negative electrode. Cations pass through the cation exchange membrane and are discharged outside the resin/membrane, while anions pass through the anion exchange membrane and are discharged outside the resin/membrane. The concentrated ions are discharged from the wastewater flow path, and ion-free water flows out from within the resin/membrane. Features of the ultrapure water equipment: 1. Wide voltage stabilization range, can operate normally even with input voltage fluctuations of ±20%. 2. High efficiency, the product includes a power factor correction circuit, achieving a power factor of up to [value]. 3. Output voltage and current are continuously adjustable, with automatic switching between voltage stabilization and current stabilization. 4. High safety performance, the output end can be short-circuited arbitrarily without damaging the machine, and the short-circuit current can be adjusted continuously from zero to the maximum value. 5. Utilizes high-frequency pulse width modulation technology, offering strong stability, high precision, small size, light weight, and low power consumption. The equipment adopts a method that unifies recommendations and customer requirements in process material selection, truly achieving unattended operation with higher cost-effectiveness and equipment reliability. Source water typically contains sediment particles, colloids, bacteria, algae, and microorganisms.

The advantages of ultraviolet sterilizer disinfection technology for ultrapure water are quite prominent, as it does not add new substances, and no toxic byproducts are produced in the disinfected water.

Before the new ultrapure water system is put into normal operation, the membrane elements must be thoroughly flushed to ensure that the system operating parameters meet the design specifications, the system's water quality and output meet the design targets, and to prevent damage to the membrane from excessive inlet flow and pressure or water hammer. Before starting the system, ensure that raw water cannot enter the elements, check each item according to the pre-start checklist, thoroughly flush the raw water pretreatment section to remove impurities and other contaminants, preventing them from entering the high-pressure pump and membrane elements. Special attention should be paid to testing whether the SDI15 value of the pretreated water is qualified and ensuring the inlet water contains no oxidizing agents such as residual chlorine; check all valves and ensure all settings are correct, the system's product water discharge valve, inlet control valve, and concentrate control valve must be fully open; use low-pressure, low-flow qualified pretreated water to displace air from the membrane elements and pressure vessels, with a flushing pressure of 0.2~0.4 MPa (30~60 psi). For each 4-inch pressure vessel, the flushing flow rate is 0.6~3.0 m3/h, and for each 8-inch pressure vessel, it is 2.4~12.0 m3/h. All product water and concentrate during flushing should be discharged to the sewer. During flushing, check all valves and pipe connections for leaks, and tighten or repair any leaking points; for systems with wet membranes, flush for at least 30 minutes before closing the membrane inlet control valve. For systems with dry membranes, perform continuous low-pressure flushing for more than 6 hours or flush for 1~2 hours first, soak overnight, and then flush for about 1 hour. During low-pressure, low-flow flushing, no scale inhibitors should be added to the pretreatment section. The output water from reverse osmosis (RO) (EDI inlet water) typically has a conductivity of 2-30 μS/cm. Depending on the requirements, ultrapure or deionized water generally has a resistivity of 2-15 MΩ·cm.