The scale inhibition experiment in the anaerobic system is in progress......

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Due to the late start of the waste treatment industry in the country, limitations in processing technologies, and high treatment costs, scaling in the pipelines used for waste treatment has long been one of the problems plaguing businesses. To address this issue effectively, various companies have had to take many detours and spend a considerable amount of money, without ultimately finding a suitable solution. After thorough evaluation by the enterprise, our company’s products were ultimately chosen as the main equipment for the experiments. Taking into account the actual conditions on site and the characteristics of the existing equipment, a combination of an electromagnetic frequency-scanning scale-inhibition device and a magnetic-shock ultrasonic device was employed. Following review by the enterprise’s technical department, specific scenarios were selected as subjects for these experiments, which were then carried out as part of a dedicated testing project. I. Product Overview 1. The electromagnetic frequency-scanning scale prevention device utilizes a frequency-scanning electronic scale removal system based on physical scale removal methods. It is originally a frequency-scanning scale removal device from Germany, and through continuous research by our company, it has evolved into a fifth-generation high-tech product. Its advantages—including the ability to operate without interrupting production, easy installation, low energy consumption, long service life, no need to add any chemicals, and no alteration to water quality—have won the favor of many enterprises and factories. Economically speaking, the cost of chemicals over one year is equivalent to the cost of purchasing the device; in other words, the full cost of the device can be recovered within just one year. In terms of application, its various functions such as scale removal and prevention, sterilization and algae control, as well as rust removal and corrosion inhibition, can help ensure the smooth operation and production of enterprises. 2. The magnetic vibration ultrasonic scale removal device is a new generation of such device developed by drawing on Russian technology and taking into account the characteristics of domestic heat exchange systems. It consists of a controller and transducers, and utilizes a strong magnetostrictive electro/mechanical energy conversion mechanism to apply ultrasonic waves directly to the metal walls of the heat exchange equipment. When ultrasound propagates through metals and the media in direct contact with them, it generates a series of related effects such as ultrasonic condensation, high-speed micro-vortices, and high-impact shear, thereby achieving online scale prevention and removal, enhanced heat transfer, and energy savings. This technology utilizes microprocessors and software systems to adjust and control parameters such as the generation of ultrasonic oscillation waves, frequency, amplitude, pulse period, and pulse width, in order to achieve optimal values of sound intensity and acceleration. Furthermore, the main feature of magnetic ultrasonic scale removal devices is that they use metal transducers; under the influence of a strong magnetizing current, the structure of this metal changes, resulting in contractional oscillations. The metal transducer is directly welded to the surface of the heat exchange equipment or pipes that require scale prevention; its oscillation waves travel through the metal of these equipment or pipes, and from there are transmitted into the medium. Since the propagation loss of ultrasound in metals is hundreds of times lower than that in water, the scale prevention and removal efficiency of such products is significantly higher than that of previous products (previous ultrasonic scale prevention and removal devices were mainly used for treating water, with the ultrasonic waves generated within water). These products solve the problem of scale buildup that has plagued many heat exchange systems over the years. II. On-site, the inlet and outlet pipes of the wastewater treatment anaerobic tank at a waste treatment facility were demonstrated. Given the highly complex nature of wastewater from waste treatment processes, which contains large amounts of both inorganic and organic substances, no physical or chemical method exists at present that can completely eliminate scaling in these pipes. With the aim of reducing scaling in the inlet and outlet pipes of the anaerobic tank, a frequency-scanning anti-scaling device was installed on the circulation pipes of the anaerobic tank, while a magnetic-shock ultrasonic anti-scaling device was installed on the outlet pipes to help address the issue of pipe scaling. III. Implementation Steps 1. For the electromagnetic frequency-scanning scale-inhibition device, wind the wire assembly around the straight section of the main pipe in the anaerobic tank circulation pipeline; the control cabinet should be installed within 15 meters of the winding location. When water flows through the electromagnetic coil, the hydrogen bonds between water molecules are significantly strengthened, which increases the solubility of calcium ions, magnesium ions, and carbonate ions. Scaling does not occur even when the water temperature rises. Based on the principles of electromagnetic action, the crystal structure of calcium carbonate changes, resulting in the formation of a soft form of scale (aragonite) that can be carried away by the water flow, thereby achieving the purpose of preventing scaling. Schematic diagram of the installation of the electromagnetic frequency-scanning scale-inhibition device (subject to the actual location on site). Pictures of the on-site installation of the frequency-scanning scale-inhibition device. 2. For the magnetic-shock ultrasonic scale-removal device, a section of the pipeline exiting the anaerobic tank where scaling is severe was selected as the test pipeline; a set of such magnetic-shock ultrasonic scale-removal devices was welded onto this pipeline. The control cabinet had to be installed within 10 meters of the welding site. By utilizing the cavitation effect, shear effect, activation effect, and thermal effect caused by the propagation of ultrasonic waves in water, changes were induced in the physical and chemical properties of the scale, causing it to become dispersed and loosened, thereby preventing it from adhering to the inner walls of pipelines and equipment, thus achieving the purpose of scale removal. Schematic diagram of ultrasonic generator installation (subject to the actual site location). Pictures of on-site installation of magnetic vibration ultrasonic devices. III. Research objectives: 1. To investigate the scale-inhibition effects of different scale-inhibition measures on anaerobic systems ； 2. Analyze the scale inhibition costs and applicable conditions of different scale inhibition measures ； 3. Develop a scale-inhibition process suitable for anaerobic systems and master the process parameters. At the current stage, due to process-related issues and cost control considerations, there are no existing cases available for reference in theoretical research. As a result, companies have undertaken in-depth studies on this topic, which has set a good example for the wastewater treatment industry and provided manufacturers with a platform to expand their business scope. IV. Current Status of the Tests: In January 2023, the electromagnetic frequency-scanning scale-inhibition device and the magnetic-shock ultrasonic scale-removal device were all installed. The test period is set at six months; data collection will begin once the system is operational. This includes monitoring and analyzing data on the quality of water before and after treatment, operational parameters, as well as samples of scale formed. Everyone is looking forward to it, hoping for good results.