Hirotsugu NUMATA

Development of the Pyrolysis Model: Predict the Amount and Calorific Value of Char in the Gasification and Melting System

Shoichi FUJITA, Toshiya KOMATSU, Shuji HIMENO

The gasification and melting system attracts attention from necessity, such as reduction of dioxin and a shortage of the landfill site now. However, since operation control and the determination of the condition are difficult for this processing method, the examination of the optimal pyrolysis conditions using the model is required for it. In this study, we establish the pyrolysis model, which predicts of the calorific value of wastes, the amount and volume of char, and we considered the influence that it has on the pyrolysis reaction in a furnace.
First, the calorific value of wastes can also be predicted using the composition ratio of the representation substance obtained from TG curve of wastes, it was checked that the composition ratio of the representation substance is appropriate also from quantity of calorific value.
Secondly, since the amount and calorific value of char, which were calculated by the pyrolysis model were in agreement with the experiment value, it was checked that it is possible to grasp the amount and fuel performance of a char.
Thirdly, we considered the influence that it has on a pyrolysis reaction by the pyrolysis model. Pyrolysis reaction in the Gasification and Melting System is influenced, in order that combustibles may react at 200-320 �� and plastics may react at 320-450 ��. And at over 450 ��, it became fixed. Therefore it was suggested that the operation conditions of the gasification and melting system have the best pyrolysis reaction temperature 450��.
The above thing showed that the operation conditions of the gasification and melting system could be grasped.