Crushed coal pressurized gasification gas-water separation and recycling system and method

The invention provides a crushed coal pressurized gasification gas-water separation and recycling system and method, and belongs to the field of coal gas separation and recycling. According to the invention, different types of coal gas water are respectively separated and recycled, so that the whole system is small in occupied area, low in investment, low in operation cost, short in treatment flow, less in equipment, less in pollutant discharge points and not easy to cause environmental pollution. By arranging a medium-pressure flash evaporator, a vacuum flash evaporator, a vacuum flash separator, an ammonia distillation tower and the like and arranging a settling tank and the top of a coal gas water tank to be connected with an inert gas pipeline, and the whole system and the separation and recycling process keep micro-positive pressure operation greater than 0.2 kPa, thereby being capable of guaranteeing that VOCs and odor exhausted from the system can be treated in a centralized mode. The coal gas water tr