Apparatus for the gasification of coal

Claim 1

An apparatus for the gasification of coal with oxygen or oxygen-containing gas and water vapor, and also if required CO 2 , said apparatus comprising: a pressure container forming a shaft gasifier having an upper coal inlet means for forming a coal bed having a free upper surface and an obliquely extending bottom surface; said pressure container having therein a chamber having a side portion thereof defined by said bottom free surface of said coal bed; at least one burner means, extending through said pressure container and into said chamber, for producing at least one primary gas jet and for directing said primary gas jet toward said coal bed in a direction opposite to a direction of flow of an upper free surace of a slag bath, thereby gasifying said coal and generating a product gas and forming liquid slag; a slag bath tank means for collecting said liquid slag adjacent said bottom free surface of said coal bed, said upper free surface of said slag bath which is collected in said slag bath tank means partially defining the bottom of said chamber; a cooling water bath positioned beneath said chamber; said slag bath tank means having an overflow weir located below said burner means over which said liquid slag flows and falls freely toward said cooling water bath; and water jet nozzles at a position located below said weir for directing at least one water jet against said liquid slag as it falls freely between said weir and said cooling water bath and for atomizing said liquid slag, thereby cooling said slag and generating steam, at least part of which is supplied as process steam to said coarse coal via a steam outlet means located above said cooling water bath and between said weir and the other side portion of said chamber.

Claim 2

An apparatus for the gasification of coal with oxygen or oxygen-containing gas and water vapor, and also if required CO 2 , said apparatus comprising: a pressure container forming a shaft gasifier having an upper coal inlet means for forming a coal bed having a free upper surface and an obliquely extending bottom surface; said pressure container having therein a chamber having a side portion thereof defined by said bottom free surface of said coal bed; at least one burner means, extending through said pressure container and into said chamber, for producing at least one primary gas jet and for directing said primary gas jet toward said coal bed in a direction opposite to a direction of flow of an upper free surace of a slag bath, thereby gasifying said coal and generating a product gas and forming liquid slag; a slag bath tank means for collecting said liquid slag adjacent said bottom free surface of said coal bed, said upper free surface of said slag bath which is collected in said slag bath tank means partially defining the bottom of said chamber; a cooling water bath positioned beneath said chamber; said slag bath tank means having an overflow weir located below said burner means over which said liquid slag flows and falls freely toward said cooling water bath; and water jet nozzles at a position located below said weir for directing at least one water jet against said liquid slag as it falls freely between said weir and said cooling water bath and for atomizing said liquid slag, thereby cooling said slag and generating steam, at least part of which is supplied as process steam to said coarse coal via a steam outlet means located above said cooling water bath and between said weir and the other side portion of said chamber.