E.g:
â— The power industry uses steam to drive turbines to generate electricity.
â— In the semiconductor industry, use pure water to clean the wafers.
â— In the paper industry, steam is used to heat the pulp and drive the turbine to generate power.
â— Pharmaceutical industry, used to produce injections (WFI) and other products, cleaning equipment, pharmaceutical molding, and generate steam.
â— In the petrochemical industry, there are generally two production methods for heating products with steam (better than open flame) and power generation.
â— Resin method, using ion exchange resin to remove cation (positively charged) and anion (negatively charged).
â— Reverse osmosis method.
The resin method is the most common and effective method for producing deionized water. Good resin can be used to produce pure water. However, the resin has a useful life, and it will be regenerated when it expires. The regeneration process is time-consuming and expensive. It requires a large amount of sulfuric acid (for cationic resins) and caustic soda (for anionic resins) to rinse the resin. The higher the efficiency of the resin (until penetration occurs), the lower the cost and the safer the environment and users. The reverse osmosis method can remove a large amount of soluble salts from unpurified water, so it is often used to pretreat water before the resin adsorbs ions. This will greatly extend the service time of the resin and reduce the frequency of regeneration treatment.
Sodium ion
Water (usually municipal water or water treated by reverse osmosis) first passes through a cation exchange resin to adsorb and remove cations such as sodium ions, potassium ions, and calcium ions, and is replaced with hydrogen ions. When the resin is saturated, the weakest ion that binds to the resin leaves the resin first. This is called "penetration". If the "penetration" occurs and can be found in time, the user can replace the old with the new resin. The resin absorbs ions, while the old resin undergoes regeneration treatment. Among all cations, the binding capacity of sodium ions is the weakest and can be accurately measured at low concentrations, so the binding capacity of sodium ions is the weakest and can be accurately measured at low concentrations, so sodium monitor (model: 1811A0) It can be used to monitor the effluent of the cation exchange resin and find that "penetration" occurs in time.
Silicate ion
The water from the cation exchange resin does not contain any cations, and is replaced by hydrogen ions (H +). Anions such as chloride and sulfate ions are still in the water. The anion exchange resin can remove these negatively charged ions and replace them with hydroxide ions (OH-), which produces pure water. Although not ionic, silica (SiO2) can be adsorbed due to a weak negative charge and is also the first to "penetrate", so the silicate can be measured to determine when the anionic resin needs regeneration treatment. The silica monitor (model: 2030) is used to monitor the effluent of anionic resin in order to detect the occurrence of "penetration" in time.
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