Reactor for the pressure gasification of coal

Claim 1

A closed reactor for the gasification of coal with oxygen and water vapor as gasifying agents at elevated temperature and under pressures of 5 - 100 bars, comprising water-cooled jacket means, said jacket means defining an inner shell surrounding the gasification zone of the reactor, rotary grate means in said gasification zone for moving the material to be gasified, an ash lock beneath said rotary grate means for receiving ash remaining from the material after gasification, said rotary grate means being provided with feed conduits for receiving gasifying agents and with apertures for the passage of the gasifying agents into the gasifying zone, said rotary grate means being composed of two concentric parts, driving means for rotating each grate part independently of the other, the outer diameter of the inner part of the grate being 0.5 to 0.8 times the inside diameter of the inner shell adjacent to the rotary grate means, and scraping means attached to the outer part of said rotary grate means, the movement of the grate parts assisting the movement of ash formed upon gasification, the rotation of the scraping means with the outer grate part scraping ash from inside the reactor to the ash lock.