| 摘要 |
<p>PURPOSE:To make it possible to carry out predictive control agreeable to actual operation by computing desulfurization efficiency after a certain time by setting scheduled waste gas flow rate and concentration of SO2 at an inlet based on the present operation data as well as the load of a boiler. CONSTITUTION:Predictive simulation computation of desulfurization ability is carried out by a computer 27 based on scheduled waste gas flow rate and SO2 concentration at an inlet, which are set depending on scheduled load alteration obtained from present waste gas flow rate and present SO2 concentration at the inlet and the relations between the load and waste gas flow rate in the inlet and between the load and the SO2 concentration at the inlet based on the present load, as well as present operation data such as waste gas flow rate at the inlet of an absorption tower 1, pH of an absorbent solution 2, the concentration of an absorbent in the absorbent solution 2, the concentrations of SO2 at the inlet 8 and outlet 9, the number of driving circulation pumps 6, etc. Then, the computed desulfurization efficiency after (t) hours and set desulfurization efficiency are compared each other and the operation conditions at the time of small deviation between both is stored and the supply of the absorbent is predictively controlled by the stored operation conditions.</p> |
