DEVELOPMENT OF A DEVICE FOR AIR PURIFICATION IN WEAVING FACTORIES

The article discusses the issues of creating devices for cleaning the air of the spinning shop of a weaving factory. Of the previously considered, the authors prefer devices using the ozone method of air purification and disinfection. The ozonator device consists of an ozonizing element, including a corona and external electrodes, discharge chambers in the form of cylinders. The corona electrode has a diameter of 50-100 microns, which is an advantage compared to foreign analogues.

Design and Experimental Evaluation of Innovative Wire-to-Plane Fins’ Configuration for Atmosphere Corona-Discharge Cooling Devices

Electro-fluid-dynamic cooling devices (EFAs) are being recognized due to their enormous advantages for their application in several industrial sectors, their performance benefits from generated ionic winds and their singular features, which make them competitive with conventional fans and heatsinks. Due to the problems in the electronics industry, where traditional refrigeration systems are not effective due to their dimensions, this study analyzes an innovative arrangement based on wire-to-plane fins by direct current (DC) positive corona discharge in atmospheric air for applications. The paper focuses on optimizing the multicriteria geometry of the electrodes. Several parameters are analyzed such as the gap between emitter and ground electrodes, the electrode materials and geometry, the diameter of the high-voltage electrode and the influence of the dielectric barriers located near the corona electrode to improve heat exchange. Experimental validation shows the potential of this arrangement related to weight, volume, non-mobile parts and silence.

Numerical simulation of electrostatic field and flow field in an electro- static precipitator

Introduction: The computational fluid dynamics (CFD) simulation of three- dimensional wire-plate electrostatic precipitator is performed in the present study. Materials and methods: The momentum equation, the electric potential equation and current continuity equation are solved by using ANSYS Fluent. The ion charge density at the corona is calculated iteratively using the Peek formula. The SIMPLE algorithm is used to treat the pressure-velocity cou- pling. The RNG k-ε model is used to describe turbulence. Results: The airflow keeps stable away from the first corona electrode. The distribution of the electric potential is dependent on the wire-plate distance and the wire-wire distance. The potential and ion charge density increase with the increase of the wire-plate distance. With the increase of wire-wire dis- tance, the maximum electric field strength decreases whereas the maximum ionic charge density increases. The ion charge density near the second corona electrode is relatively small. A small wire-wire distance will make the electric field concentrated around the wires. Conclusion: According to this study, the wire-wire distance and the wire- plate distance have great effect on the distribution of ion charge density and electric field strength.

Electrostatic separation for recycling silver, silicon and polyethylene terephthalate from waste photovoltaic cells

Electrostatic separation technology has been proven to be an effective and environmentally friendly way of recycling electronic waste. In this study, this technology was applied to recycle waste solar panels. Mixed particles of silver and polyethylene terephthalate, silicon and polyethylene terephthalate, and silver and silicon were separated with a single-roll-type electrostatic separator. The influence of high voltage level, roll speed, radial position corona electrode and angular position of the corona electrode on the separation efficiency was studied. The experimental data showed that separation of silver/polyethylene terephthalate and silicon/polyethylene terephthalate needed a higher voltage level, while separation of silver and silicon needed a smaller angular position for the corona electrode and a higher roll speed. The change of the high voltage level, roll speed, radial position of the corona electrode, and angular position of the corona electrode has more influence on silicon separation efficiency than silver separation efficiency. An integrated process is proposed using a two-roll-type corona separator for multistage separation of a mixture of these three materials. The separation efficiency for silver and silicon were found to reach 96% and 98%, respectively.

Study on Dust-Removing Characteristic of Carbon Fiber Membrane in Electrostatic Precipitator

A novel wet electrostatic precipitator used carbon fiber membrane as collector electrodes was designed for effective control of fine aerosol. The volt-ampere (V-I) characteristics of 3k，6k and 12k carbon fiber membrane with four kinds of typical discharge electrode were investigated to seek the ideal form of corona electrode. The results showed that 12k carbon fiber membrane obtained a higher corona current in the same voltage.