Archive for February 2012


Steam Power Electrode Boilers

Steam boilers controlled electrode designed to produce the vapor pressure of 0,6 MPa (6 kg / cm 2) and used for heating in residential and industrial premises, as well as for process steam supply agricultural, industrial and household objects. Symbol boiler: numerator – power consumption, kW, the denominator – nominal supply voltage, kV. For example, the symbol CEPD-250 / 0,4 stands for: Electrode Steam Boiler adjustable power output of 250 kW, a rated voltage of 0.4 kV Mains. In a steam boiler heat released during the flow of electric current through water, represents the resistance goes to its heating and evaporation, thus electrode steam boilers produce saturated par.V cylindrical body of the boiler is installed coaxial cylindrical shell with two cameras – steam-generating and Displacement. In the steam-generating chamber is a package of flat electrodes, which in current-carrying studs through the bushing in the bottom of the voltage is 0.4 kV three-phase mains. The water that fills the interelectrode space, forms the active electrical resistance included in the scheme of 'triangle'. The ends of the plate package electrodes are insulated from the outside dielectric plates to avoid unbalanced loads on the phases of the (skew). In the case of boiler feed water with low resistivity electrode system made of three cylindrical rods instead of flat. Displacement and steam-generating chamber are reported on the water at the bottom of the boiler on a pair of two chambers connected only via the temperature controller. Boiler construction provides automatic control in a given mode electric power boiler and, consequently, its steam.

Sleeve Filter

More and more we talk about environmental pollution, environmental problems and global warming. One of the reasons that these problems are exacerbated, the industry, more emissions are allocated to factories. At this each time the plant has the exact maximum level of emissions that it can release into the atmosphere if the emissions do not meet the requirements, followed by fines and sanctions. To capture harmful and / or unnecessary dust installed filters, and very often this bag filters. Bag filters can be used for two purposes: 1) to prevent ingress of atmospheric emissions of the production process and 2) the collection of products and return it back into production. It was in these filtration systems, such as filter elements, filter bags installed.

Sleeve filter may have different sizes (diameter and length), different arrangements for strengthening them in the filter, and their various modifications are dictated by what a regeneration system is applied in a particular installation. For example, in systems with impulse blowing (the surface of the sleeves brush away from nozzle dust momentum of air), typically used for hose frame basis with a weight of 500-600 g/m2, which makes the sleeve extra strength and durability. In the Shakers used the sleeves of the materials of 350-400 g/m2 because of flexibility. It is also lighter and more flexible materials used in the sleeves for systems with backflushing, their weight is usually in the borders of 400-500 g/m2. What materials are used in the manufacture of filter bags? Usually it is woven punched material from various synthetic fibers. The choice of fiber is determined by the environment and the process temperature. For example, for dry environments where the temperature neprivyshaet about 140 degrees Celsius, are used sleeve of nonwoven webs of polyester fibers.

On the other hand, if the environment is very acidic and the temperature reaches 270 degrees Celsius the only thing that fits, it's the sleeve of polytetrafluoroethylene. Also differ and the ways longitudinal joint sleeves. Most-seam stitching way but also can use the method of heat sealing. Heat seal is only possible if the sleeve of a material which melts at certain temperature (polyimide and polytetrafluoroethylene welding is impossible). There are many manufacturers of filter bags but only some of them are knowledgeable and experienced producers. For best kachnstva vyberat checked bags. More details on the sleeves and species you can find on the website Andrew Webron Limited, which is a manufacturer of nonwoven fabrics and filter bags.