Is water electrolysis for descaling a new technology or a scam? Please provide an analysis
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This post was last edited by *aojiaoya0546 on 2016-10-26 at 10:40. It’s a company in Beijing that claims to use Israeli technology; I asked about it and the price is very high. I’m not sure if the quality is good or not. Does anyone who knows something about this company want to share their thoughts? Thank you. The Electrodescaling System (EST) represents a revolutionary advancement in the new millennium; it embodies the latest level of online descaling technology. EST achieves equipment protection and scale removal through electrolysis, and is primarily used in applications such as cold and hot water systems in hotels and restaurants, hospitals, schools, and large public venues, as well as in industrial cooling water circuits, central air conditioning system cooling water circuits, and drinking water systems. http://www.elgressy.com.cn/userfiles/image/EST%E5%9B%BE1.jpg The water is processed in a reaction chamber, going through an electrolysis process. During the electrolysis process, a chemical reaction occurs at the cathode, producing OH- ions which increase the pH value near the inner walls of the reaction chamber, thereby enhancing the alkaline environment in that area. The diffusion layer adjacent to the reaction chamber walls disrupts the chemical equilibrium of scale, causing calcium carbonate to precipitate from the water and adhere to the inner walls. At the same time, the current at the cathode causes the ions of the dissolved heavy metal elements to form precipitates, which settle to the bottom of the reaction chamber. It should be noted that EST is not an electrolytic water softener. The calcium carbonate precipitated by the EST system is the portion that tends to deposit in the cooling water pipes. These harmful deposits can clog pipes, cause scale formation and increase corrosion, reduce heat exchange efficiency, and hinder production. The EST system can permanently remove more than 30% of the calcium present in the water entering the reaction chamber. This percentage also varies depending on the composition of the water. The main chemical reactions that occur near the inner wall of the reaction chamber are as follows: 2H2O (l) + 2e- → H2 (gas) + 2OH- (aq) – reactions that take place in alkaline solutions (near the cathode). CO2(aq) + OH-(aq) → HCO3- (aq); HCO3- (aq) + OH- (aq) → CO32-(aq) + H2O (liquid). Calcium ions (Ca2+(aq)) can form calcium hydroxide: Ca(OH)2 (scale), or calcium carbonate: CaCO3 (scale). The chemical reactions that occur near the anode include the production of oxygen: 4OH- → O2(g) + 2H2O + 4e-. Free chlorine is formed as follows: Cl- – e- → Cl0 (chlorine gas). 2Cl-(aq) → Cl2(g) + 2e-. Ozone is produced through the reaction: O2 + 2OH- – 2e- → O3(g) + H2O. Hydroxyl radicals are formed as follows: OH- – e- → OH0 (hydrogen peroxide). Oxygen radicals are generated via: 2H2O – 2e- → O0 + 2H+. The reaction chamber uses special titanium-based electrodes with a long lifespan, designed for high current levels; these electrodes have a nickel oxide coating (TiNiO). These electrodes were developed by Aegis Engineering Services Ltd. specifically for the EST system. A microcomputer-controlled fully automatic piston is used to automatically remove scale formed in the reaction chamber. http://www.elgressy.com.cn/userfiles/image/EST2.jpg ① Reaction chamber (cathode) ② Anode ③ Cylinder ④ Water inlet ⑤ Waste outlet ⑥ Scraper ⑦ Water outlet ⑧ Power and control unit ⑨ Scraper guide rod. The power and control unit includes a reset button for stopping the operation of the system. A conductivity testing circuit, used to adjust the operating current based on the conductivity of the water being processed. Provide corresponding selectable functions based on different processing procedures. To monitor the operating status of the EST system, there are three indicator lights on the distribution panel: a green light indicates that the system is in operation. A green light indicates that the dipping process is in progress. A red light indicates that the conductivity of the water is too high. When descaling and self-cleaning processes are necessary, the microcomputer issues commands to drive a piston that matches the internal dimensions of the reaction chamber exactly. The inlet valve closes automatically, and the piston descends slowly, sweeping and scraping the soft scale on the inner walls of the reaction chamber to the bottom of it. Then the outlet valve opens automatically, and a high-power pump is used to remove the accumulated scale from the reaction chamber. Finally, the inlet valve opens, and fresh water enters the reaction chamber. This process occurs cyclically and is controlled by the EST microcomputer. Two applications of the EST system in cooling water systems. There are two ways to combine the EST system with cooling towers: In cooling towers, the EST system can be combined in two scenarios. A Water Treatment for Reuse ； B. Bypass treatment for cooling circulating water. When option A is selected, the EST system is installed on the make-up water pipeline and handles only make-up water. The size of the EST system is determined by this traffic volume. When B is selected, all cooling water is treated. A circulation pump must be installed between the cooling water circulation system and the EST system; all cooling water is treated, including make-up water. This is a solution tailored to the customer’s needs, as water hardness increases as the concentration ratio rises. In this case, the EST system needs to be adjusted in size appropriately. Note: The pump is optional. The standard designs are available in the following five flow rates; for high-flow designs, please contact our distributor. EST 5, flow rate 5 m3/hr ； EST 5 means 5 m3/h ； EST 10, flow rate 10 m3/hr ； EST 15, flow rate 15 m3/hr ； EST 25, flow rate 25 m3/hr. The operating pressure is 6 bar. Maximum operating temperature: 50°C. Under normal use conditions, the EST system has a shelf life of 12 months. Based on years of experience and research, in the EST pre-scaling system, it is capable of precipitating those types of scale that tend to settle, but it can also cause silica to precipitate. Silica deposition occurs due to the aggregation and precipitation of other minerals in water, with other polyvalent ions reacting with it. The solubility of silica depends on many factors, such as pH value, temperature, the size of particles in water, the hydration of those particles, and other ions present. Hard silica scale results from the formation of a silica lattice induced by the deposition of calcium carbonate or other minerals. Silica precipitation can only be prevented by absolutely controlling corrosion and microorganisms. Aegis Engineering Services has developed a +L electrolysis system to prevent scale crystallization and silica deposition. +The L electrolysis system is used in series with the EST system to assist EST, facilitate better propulsion, and more effectively promote the precipitation of silica as well as prevent its crystallization in water systems. +The L electrolysis system consists of different materials, various components, and an anode that meets the standards approved by health authorities, all of which are used to prevent the crystallization of silica scale.
It looks good, but what about the cost? There are many devices available for softening water nowadays. Additionally, adding a certain amount of scale-inhibiting agents to the circulating water can also achieve the purpose of preventing scaling!
Take a look at the discussions in this section and the result given by the original poster, then form your own judgment. http://bbs.hcbbs.com/thread-938890-1-1.html
The high-voltage electrostatic water treatment device and the electrolytic water treatment device mentioned on the 3rd floor are two products with completely different working principles. An electrolytic water processor causes scale to precipitate on the inner walls of the equipment, thereby keeping the circulating water in the pipes in an unsaturated state and preventing scale formation naturally ； Furthermore, electrolytic water treatment devices can create a strongly alkaline environment at the cathode, and hydrogen peroxide, chlorine, and ozone are generated at the anode – all of which help to kill bacteria and algae; thus they can completely replace chemical agents ； High-voltage electrostatic water treatment devices work on the principle of scale inhibition, and they cannot completely replace chemicals; this is the biggest difference between the two products. Those who are interested in electrolytic water treatment systems can get in touch with me. There are already many successful applications in China, across industries such as automobiles, non-ferrous metals, food, and coal chemical processing. The product samples provided by the original poster are too old; those who are interested can contact me, as I have the latest samples of the products. I am a distributor, QQ: 598965031
I don’t know how much this price is
This post was last edited by *aojiaoya0546 on 2015-12-14 17:16. Why are all these new technologies developed in Israel? Such a small country, yet it has such advanced technology. Our company has also adopted their technology to develop an electrochemical scale removal system, and we hope to have more exchanges with everyone in the future. Please share your valuable suggestions; feel free to contact me via private message
It should be asking about descaling (I think this is impossible; in that case, the scale in the system would gradually decrease until it became completely clean) Less scaling (will it)? Or does it simply not work at all (most likely)? I once conducted experiments with two systems: one without water treatment and another with water treatment; after one month of operation, the degree of scaling was similar in both cases. Two tests were conducted, and the conclusions were the same. I don’t know if you’ll believe it or not?
We have conducted research on this before; it is primarily used as a substitute for descaling agents. The initial investment is high, but the operating costs are low. However, there is a balance point that depends on the water usage – the greater the water volume, the more significant the savings will be
After leaving that company, my friend told me that this product cannot be used alone in closed-loop cooling water systems. Although it can remove some scale, the amount of flow used for side-stream treatment is only 3% of the total volume of water in the circulation system; as a result, the amount of scale removed is far less than the amount of hardness added to the system through the incoming water. Therefore, the overall hardness and alkalinity of the cooling water system still increase, and acids must be added to reduce these levels in order to prevent scaling. However, improper control when adding acid can lead to corrosion; it’s better to add corrosion and scale inhibitors instead. Therefore, this product is merely a health supplement. If the system is already set up for chemical treatment, there’s no need to use it at all. My friend said that in any system that uses only electrolytic descaling without the use of acid or corrosion/inhibition agents, scaling is inevitable; this product is nothing but a scam. :