Process technology analysis and comparison of crushed coal pressurized gasification solid slagging system
The fixed bed crushed coal pressurized gasification is an important coal gasification technology,and it is an important link to adopt appropriate slagging technology according to the ash and slag characteristics.There are mainly hydraulic wet slagging,water-cooled dry slagging and air-cooled dry slagging methods at the moment.The three slag discharge methods were analyzed and compared from the aspects of collection of ash and slag,cooling method,comprehensive utilization,water saving and energy saving,etc.It was concluded that the hydraulic wet slagging technology was mature,but it was relatively backward.The water-cooled dry slagging technology was in between the air-cooled dry slagging method and the hydraulic wet slagging method.The air-cooled dry slagging technology had many advantages,but currently it had no application reference in the crushed coal pressurized gasification system.Various factors should be considered comprehensively to select the slagging technology matching the coal chemical project.
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