U.S. patent for Russian pollution control device
ANN CHAMBERS, associate editor
An air pollution control device created by Russian scientists has been granted a U.S. patent, as it readies to enter the North American market. The Pulsatron Technology machine, marketed under the trade name Pulsatech, destroys more than 99 percent of the polluting molecules produced in most industrial processes, leaving behind basic elements such as air, water and carbon. The device uses specially generated high-voltage, high-frequency electrical pulses within a reaction chamber to destroy pollutants. The process begins with polluted waste entering a specially designed reaction chamber. Once inside, the molecules are subjected to a bombardment of electrical pulses from a coronating electrode. Approximately 100 pulses per second are typically emitted, each with a duration of 100 to 400 nanoseconds (ns).
In between the brief but high-powered pulses, the pollutants are assaulted by a dc discharge–making the device react like an electrostatic precipitator. The intense electronic activity creates many collisions with the molecules flowing by in the waste stream. The collisions divide all the molecules into their constituent parts. The polluting molecules are broken down into their basic elements, and air and water molecules separate into harmless oxygen atoms, hydroxyl radicals and water vapors.
“Russian technology and science have always been advanced, if not well-known or always accepted abroad,” said Godfrey Harris, Pulsatron Technology Ltd. managing director. “With the help of the Sheet Metal Workers` International Association and the U.S. Department of Energy–both of which realized the originality of the Russian approach to air pollution problems–American industry now has a device available that will provide cleaner air at a fraction of the cost of other technologies.”
The device has three major systems: Electrical system–a specially designed generator transforms electrical current drawn from normal commercial power sources through a series of capacitors, a Thyratron switch and a modified transformer rectifier to create a high-powered pulse corona and dc discharge; Reaction chamber–a long narrow stainless steel tube containing a specially shaped, high-quality metal electrode running down the center. The flow of electrons in the reaction chamber collides with the polluting molecules created in an industrial process and initiates a chain-like reaction that splits the molecules into constituent parts and allows other elements in the waste stream to fall to the base of the chamber for removal; Control room–an area where a variety of analytical devices monitor the activity in the reaction chamber, measuring the concentrations of pollutants in the incoming and outgoing gas stream and changing the parameters of the operation to optimize the destruction of whatever type of molecule is targeted.
Six of these devices are installed. The first, a laboratory model, is in the Laboratory of Low Temperature Plasma Chemistry, Institute of Chemical Physics, of the Russian Academy of Sciences in Moscow. A full-scale industrial model is sited at SEDB Horizont, also in Moscow.
An industrial prototype, used for SO2 reduction, is installed at the Ryazan Tin Smelting Factory in Ryazan, Russia, and an industrial model for NOx reduction is located at the Khrunitchev Missile Factory in Moscow. SEDB Hirozont also has the Colt Operational Prototype which is removing MEK and Toluene. A U.S. demonstration model for NOx reduction is located at the WETO Test Bed Facility in Butte, Mont.
Pulsatron Technology Ltd. is a private British company founded in 1993, with offices in England, Russia and the United States. More information on the device is available at (310) 278-8037.