| 摘要 |
In order to obtain utilizable gas from garbage by pyrolysis, the garbage is compressed into pellets or granules of a size between 1 and 50 mm, is brought to a dry substance content of at least 75%, and is then placed in a heated low temperature carbonizing drum in which low temperature carbonization gas is produced and is separated from residual substances such as ash and other fines. The low temperature carbonization gas thus produced is broken down into fuel gas in a gas converter, with the addition of air and in the presence of a bed of glowing coal. The garbage is first separated into a wet vegetable fraction and a lighter fraction of less weight, the said lighter fraction being then compressed into briquettes, pellets or granules and degasified by pyrolysis, while the wet fraction is sent to a biogas installation to form methane gas. This method enables to retain low temperature pyrolysis while improving the recovery of energy. |
