The Application of Peristaltic Pump in the Preparation of Hypochlorous Acid Disinfectant for COVID-19 Control

Introduction: The peristaltic pump can be a good equipment for the industrial preparation of hypochlorous acid disinfectant. It can continuously and stably add dilute hydrochloric acid or sodium chloride water into the electrolytic tank, and meet the requirements of micro-flow liquid addition and precise quantitative transportation. The peristaltic pump can It can operate stably and reliably for a long time, and can withstand the corrosiveness of hydrochloric acid and sodium chloride water. The product structure is simple and reliable, and can achieve low maintenance or no maintenance. The 2019 novel coronavirus, or "2019-nCoV", was discovered due to cases of viral pneumonia in Wuhan in 2019 and was named by the World Health Organization on January 12, 2020.

Human coronavirus is sensitive to organic solvents and disinfectants. 75% alcohol, ether, chloroform, formaldehyde, chlorine-containing disinfectants, peracetic acid and ultraviolet light can all inactivate the virus. (Quote from: "China CDC" official WeChat "China Disease Control News" published an article on January 9th "Coronavirus? The Chinese Center for Disease Control and Prevention tells you!") Hypochlorous acid is a chlorine-containing disinfectant that can be electrolyzed through electrolysis The method uses electrolysis cells with or without diaphragms to electrolyze low-concentration hydrochloric acid and/or sodium chloride aqueous solutions to produce hypochlorous acid. (Quoted from: Article published on the official WeChat account of "Electrolyzed Water Technology Channel": "Guidelines for the Use of Acidic Electrolyzed Water/Hypochlorous Acid Water to Prevent and Control New Coronavirus"

In the equipment for industrialized preparation of hypochlorous acid disinfectant, it is necessary to continuously and stably add dilute hydrochloric acid or sodium chloride water to the electrolytic tank. This requires a micro-flow pump that can accurately deliver quantitatively. This pump should preferably be able to last for a long time. For stable and reliable operation, since the hydrochloric acid and sodium chloride water transported is corrosive to a certain extent, the pump must be able to withstand corrosion and achieve low or maintenance-free operation. At the same time, the cost of the pump must not be too high. To facilitate mass production of equipment and low-cost maintenance of equipment. Our water electrolysis machine customer finally chose Jieheng peristaltic pump after comparing and trying out various pumps.

The peristaltic pump uses a runner to squeeze the hose to realize liquid transportation, so the liquid only passes through the hose. The specially customized hose can withstand the corrosiveness of hydrochloric acid and sodium chloride water. The mass product of Jieheng peristaltic pump It achieves long-term and high-precision quantitative delivery while meeting cost requirements and high stability. Currently, the commonly used peristaltic pump models we use in disinfection water machines include: 104KA, MN3, and MN4. After several years of batch use by customers, these pumps have been recognized and affirmed by customers in the industry.

The principle of a peristaltic pump: It is like clamping a elastic hose with fingers. As the fingers move, the liquid in the tube moves with it. As the finger moves, positive pressure is generated at the outlet of the hose to discharge the liquid, and negative pressure is generated at the inlet of the hose to suck in the liquid. The peristaltic pump tube is in a peristaltic state when working, so it is called a peristaltic pump. The liquid is transported forward by the pressure wheel, so the peristaltic pump is also a positive displacement pump.

The advantages of peristaltic pumps:

1. Cleanliness: The pumping fluid only passes through the hose, without contaminating the pump body. By simply changing the hose, different fluids can be transported.

2. Precision: It allows for accurate control and regulation of flow rate (precision of 5‰~2%, flow rate range of 0.01ml/min~36L/min in a single channel).

3. Self-priming: No need for pre-filling, it can operate dry, with a maximum suction height of up to 8 meters.

4. Self-locking: The rotor pressure point of the peristaltic pump keeps the hose in a closed state, providing a one-way valve function.

5. Bidirectional: By simply changing the direction of motor rotation, the direction of fluid transport can be easily changed, allowing for positive and reverse flow as well as back suction.

6. Non-shearing: The fluid transport in a peristaltic pump is achieved by the contraction and expansion of the hose, resulting in no shearing force on the fluid inside the tube. This ensures that fragile particles within the fluid, such as orange segments in fruit juice, are not damaged during pumping.

7. Easy maintenance: Without valves or seals, the hose is the consumable part, making installation, replacement, cleaning, and maintenance easy and cost-effective.

8. Easy scalability: The design of pump heads, drives, and control modules allows for easy replacement. It can be operated in a single channel or multiple channels can be stacked for increased capacity.