Sign in to follow this 0 Started by rybomaster, March 17, 2003 Prev 1 2 Next Page 1 of 2 Prev 1 2 Next Page 1 of 2 Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community.Register a new account Sign in Already have an account?Sign In Now Sign in to follow this 0Situation: Waste Water Treatment Plants produce "Digester Gas" (DiG) as a by-product of the waste water treatment.The DiG is used as fuel for reciprocating internal combustion engines to drive air blowers and/or electric generators.The air from the blowers is used in the digester process; the electricity from the generators is used in the plant; excess electricity is sold to electric utility companies.The heating value of the DiG depends largely on the type of waste that is being processed, and can therefore vary widely.

These variations require the engines to be set up in a very "forgiving" mode, resulting in diminished efficiency and increased exhaust gas emissions.Occasionally, the supply of DiG is interrupted due to equipment maintenance.This leaves the engines without fuel, which leaves the digester process without the air from the blowers, which is needed to stimulate and boost the digester process.Solution: Both goals, stabilization of the properties of the DiG as fuel for the engines, and backup fuel supply for times when DiG is unavailable, can be covered with the Installation of a single POM blender with Automatic Gas Properties Control (AccuBlend�).Operation: The POM blender is supplied with NatGas, with Digester Gas, and with Air.If DiG is available from the waste water treatment process, the POM blends NatGas and DiG at a varying ratio that results in very stable fuel gas properties (Calorific Value) for the blower/generator engines.

If DiG is not available from the waste water treatment process, the POM blends NatGas and air at a ratio that results in a mixed gas that allows the blower/generator engines to operate at their highest efficiency with the lowest possible emissions.A gas analyzer at the outlet of the POM measures the properties of the NatGas/DiG or the NatGas/Air mixture.If the gas analyzer detects a deviation of the gas properties from the desired values, the AccuBlend� controller automatically adjusts the position of the piston in the POM, thereby changing the blending ratio, and re-establishing the desired properties.Koppers is a global chemical and materials company based in Pittsburgh, Pennsylvania, United States in an art-deco 1920s skyscraper, the Koppers Tower.Contents 1 2 3 4 5 6 7 8 The corporation is divided into three business units: Carbon and Chemicals, Railroad Products and Services, and Performance Chemicals.

The company specialises in manufacturing carbon chemicals from coal tar.The five main chemicals that are produced are coal pitch for steel and aluminum production, carbon black for rubber vulcanization, creosote for wood treatment, and naphthalene and phthalic anhydride for plastics and polyester.vaporizer break inKopper's coal tar pitches are essential to manufacturing carbon anodes for aluminum smelting.ampli fender vaporizer avisKoppers also has extensive operations making creosote treated wood products, especially railroad ties and switches.vaporizer bakersfieldUtility poles, foundations, decking materials, and wooden panneling are also produced by the company.cr123 vaporizer

In 1943, Koppers, at the US Government's behest, built a factory in Kobuta, Pennsylvania on the left bank of the Ohio River just downriver from Beaver, to manufacture styrene-butadiene monomer, a building block used to make a form of synthetic rubber for the World War II defense effort.bullet vaporizer penIn 1951, at Port Arthur, Texas, the company built a plant to manufacture the chemical monomer ethylbenzene, using as raw materials ethylene from the nearby Gulf Oil refinery, and benzene, which was a byproduct of the company's coke ovens in Pennsylvania and which was shipped down to Texas by barge.chromalox vaporizerThe ethylbenzene produced there was then shipped by barge back up to the Kobuta plant where it was converted to styrene monomer, and then polymerized to make expandable polystyrene.In the early 1950s, the company purchased a license to manufacture polyethylene at its Port Arthur plant.

These chemical operations later were the basis for forming a new corporate entity with Sinclair Oil Corporation to form the Sinclair-Koppers Company in 1965.In 2001, the company had to close down a wood treatment plant in Oroville, California due to contamination of the 205 acre facility, and the surrounding area.Chemicals like PCP and chromium were found to have been leaked into the local drinking water supply.In early 1988 Beazer, a British conglomerate run by one of the foremost corporate raiders of the 1980s, successfully launched a hostile takeover of Koppers for $1.81 billion ($3.8 billion today).The sale was completed on June 17, 1988.[1]A smaller, more streamlined domestic business unit of Koppers was bought back by local management in the early 2000s, and although much simpler than the once sprawling chemical and aggregate conglomerate of the early-to-mid 20th century, Koppers has once again become successful at its core businesses.In 2006 the new Beazer-free independent Koppers again went public [2].