The invention provides a start-stop control method and
system for a clean pulverized
coal gasification apparatus to treat
wastewater. The method comprises the steps of 1) performing airtight
leak testing and exchanging, to be specific, performing pressurizing-depressurizing and exchanging three times on the clean pulverized
coal gasification apparatus; 2) igniting, to be specific, controlling valves to introduce ignition air and ignition
fuel gas for igniting; 3) pressurizing, to be specific, controlling valves to introduce pressurized
oxygen and pressurized
fuel gas; 4) charging
coal, to be specific, controlling valves to charge
oxygen and pulverized coal into a gasifier
system for combusting; 5) charging
wastewater, to be specific, controlling valves to charge the
wastewater into a gasifier for combusting; 6) conducting gas, to be specific, controlling valves to supply gas into a rear
system heat pipe; 7) stopping, to be specific, opening purging and exchanging valves to perform stopping, purging, exchanging and cooling for the system. Air is used herein to perform igniting; the operating control process has high
safety coefficient; operating is simple and reliable; airtight testing and exchanging are carried out at the same time, the efficiency is high, and the cost is lower; a wastewater charging device is included in the system so that the system is good in safety and environmental friendliness and lower in cost.