用于欧拉数值模拟的改进T-T吸收剂固硫模型

In order to realize simulations of multiphase flow and desulphurization reaction processes at medium temperature in CFB reactor, a sulphur capture model of T-T sorbent has been introduced in the Eulerian approach. The Calcium conversion rate that represented the sulphur capture behavior of the sorbent was a function of time and could not be used as a state parameter. For this reason, a new relationship between the derivative of Calcium conversion rate with respect to time, namely the reaction rate of T-T sorbent, and Calcium conversion rate has been set up according to experimental data. It has been found that the reaction rate is proportional to the square of Calcium conversion rate in different ranges. As a result, an improved sulphur capture model of T-T sorbent has been obtained and a differential equation for Calcium conversion rate derived. Thus, the conservation equation set for multiphase reaction flows in Eulerian frame was closed and served as the theoretical basis for simulating flue gas desulphurization processes.