Gas: heating and illuminating – Processes – Fuel mixtures
Patent
1994-10-27
1995-11-28
Kratz, Peter
Gas: heating and illuminating
Processes
Fuel mixtures
48209, 252373, 423240R, 4234182, C10J 306, C10K 102, C10K 106
Patent
active
054703611
ABSTRACT:
In the process for gasification of municipal waste plastic waste material pieces of about a 20 mm piece size are compressed and heated at a pressure of from 40 to 80 bar until at a temperature of from 230.degree. to 300.degree. C. to produce an HCl-containing gas and a plastic waste material containing less than 3000 mg of HCl per kg and the HCl-containing gas produced is washed with water to produce a hydrochloric acid solution. The plastic waste material is then heated further until at a temperature of from 400.degree. to 500.degree. C. to form a plastic melt having a viscosity of less than 300 cSt, advantageously less than 50 cSt. This plastic melt is gasified at a pressure of 4 bar with oxygen in a flame reaction to form a crude gas containing a preponderant proportion of CO in relation to CO.sub.2 in a gasification chamber having a central temperature of about 1600.degree. C. The crude gas is withdrawn from the gasification reactor at a temperature of 1300.degree. to 1600.degree. C., quenched with a water spray to cool it until at a temperature of 700.degree. to 900.degree. C. and then further cooled by indirect heat transfer in a heat exchanger producing steam until at a temperature of from 220.degree. to 300.degree. C. The cooled crude gas is dedusted until a dust content of less than 20 mg/Nm.sup.3 of crude gas is reached and the dedusted gas is washed and desulfurized to form the product gas.
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Linke Adolf
Pohl Werner
Schmid Karl
Wetzel Rolf
Kratz Peter
Krupp Koppers GmbH
Striker Michael J.
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