Numerical simulations of coal gasification at high temperature in an entrained flow reactor.

摘要

Entrained flow coal gasification is becoming increasingly important particularly in the development of Integrated Coal Gasification Combined Cycle (IGCC) technology for the production of electricity. However, there is a lack of knowledge worldwide for the gasification process and more especially for the chemical reactions (reactions rates, constants) that take place under high temperature and pressure. Therefore, two gasifiers have been designed and built at the Institute for Energy Systems (Lehrstuhl für Energiesysteme - LES) at the Technische Universitat München. The first, the atmospheric entrained flow gasifier can operate at very high temperature, up to 1700 °C - 1 bar , the second , high pressure and temperature gasifier- up to 1800 °C and 1-50 bar. In an ongoing project, a great variety of experiments under different conditions are performed to determine chemical reactions rates at high temperature conditions. The final goal of such investigations is to extend the validity of these models for high pressure and temperature conditions using the high pressure pilot scale gasifier built in LES. In the present paper different operating temperatures and fuel composition have been used and tested. The performed CFD numerical simulations of pulverized coal gasification are compared to experimental data.