Original: Dong Xingwen, Chief Engineer of Yantai Fangxin Water Treatment Equipment Co., LTD

Proofread by Liu Yan

Date: October 10, 2020

(2) How to manufacture devices with larger flow rates or unlimited flow rates? There are not many enterprises on the market with a production capacity of equipment for manufacturing slightly acidic hypochlorous acid water exceeding 1T/H. As the world's factory, China has many large-scale processing enterprises of agricultural and sideline products, aquatic products and food, etc. They often need equipment capable of producing 10 to 300 tons of hypochlorous acid water per hour, and the 24-hour production days throughout the year exceed 330 days. High-flow or ultra-high-flow equipment cannot merely be a simple amplification or parallel connection of household or commercial low-flow devices. Just as a minivan manufacturer cannot immediately produce high-quality heavy-duty trucks, an excellent device needs to undergo long-term operation tests, and equipment manufacturers also need to gradually accumulate experience in practice. Through extensive use by customers from various industries at home and abroad, Fangxin has continuously broken through various limitations and can design and customize equipment for customers with any flow rate, any available chlorine content, and any pH value requirements.  

(3) How to prepare slightly acidic hypochlorous acid water with high concentration of available chlorine? Some enterprises require high-concentration slightly acidic hypochlorous acid water, hoping for an effective chlorine concentration of 1000 to 10000 PPM to facilitate transportation. In different application scenarios, it is diluted into slightly acidic hypochlorous acid water of different concentrations according to the process requirements for use. If a single dilute hydrochloric acid solution is electrolyzed to produce slightly acidic hypochlorous acid water with an effective chlorine concentration exceeding 100ppm, the pH value will gradually drop below 5. As the pH of hypochlorous acid water decreases, the chlorine odor gradually intensifies until a pungent smell emerges. To increase the pH value, according to the existing technology, the proportion of sodium chloride in the electrolytic mixture is increased. However, this method will significantly increase the loss of electrolytic power, reduce the conversion rate of Cl-, and cause the concentrations of Na+ and Cl- in the acid water to rise sharply. Any enterprise that manufactures equipment in accordance with Japanese schematic diagrams or processes will encounter the above-mentioned problems.

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