| 摘要 |
<p>The quantity of char (7) at given conditions to be supplied is obtained from the relation between the flow of steam (3) and the quantity of raw material (5) input to a modern gasification furnace (1); an optimal coefficient is obtained from the relation between the circulating quantity of a bed medium (4) and the temperature of the modern gas furnace (1). This coefficient is multiplied to the quantity of the char (7) at given conditions to be supplied in order to calculate the actual quantity of char (7) to be supplied. The amount of heat generation necessary to maintain the specified temperature of the combustion furnace (2) is found by subtracting the total heat generated by the char (7) flowing into the combustion furnace (2), which is found using the quantity of char (7) supplied, from the heat necessary to maintain the specified temperature, which is derived from the relation between the combustion airflow and the temperature specification in the upper part of the combustion furnace (2). A supplemental fuel supply device (21) is controlled based on the leading specification by calculating a supplemental fuel manipulated variable using the aforementioned amount of heat generation necessary to maintain the specified temperature, and the supplemental fuel supply device (21) is feedback-loop controlled to adjust the supplemental fuel manipulated variable such that the difference between the temperature specification in the upper part of the combustion furnace (2) and the detected temperature in the upper part of the combustion furnace (2) becomes zero.</p> |
