| 摘要 |
PROBLEM TO BE SOLVED: To predict a furnace wall tube sulfide corrosion degree using calculation of reaction fluid.SOLUTION: A concentration relational expression between a gas concentration of chemistry element that can be attained through calculation of reaction fluid at a step S4 and a gas concentration of specified chemistry element that cannot be attained through calculation of reaction fluid at the step S4 is obtained using thermodynamics balance calculation at a step S13 (step S14). Then, a gas concentration distribution in an analysis target region of the specified chemistry element that cannot be attained under a calculation of reaction fluid at the step S4 is calculated using the temperature distribution and gas concentration distribution calculated at a step S31 and a concentration relational expression calculated at the step S14 (step S32). Then, a distribution of corrosion amount in a region to be analyzed is calculated using a corrosion rate expression, a furnace wall tube temperature calculated at step S21, and a gas concentration distribution of the specified chemistry element calculated at the step S32 (step S41). Then, a distribution of a furnace wall tube sulfide corrosion in the object region to be analyzed is estimated using the calculated distribution of a corrosion amount (S42). |
