Apparatus and system for producing coal gas
First Claim
1. Apparatus for producing coal gas comprising:
- a retort having a central reaction column surrounded by a wall and having an outlet for hot coal gas produced by the reaction column;
means for introducing pulverized coal, or the like, into the reaction column;
wall means forming an annular chamber surrounding said first-named column in coaxial relationship therewith;
burner means coupled to said annular chamber;
means for introducing combustible gas and air into the annular chamber to be burned by said burner means so as to produce hot flue gas passing through the annular chamber for maintaining the wall of the reaction column at a temperature higher than the interior temperature of the reaction column so that heat is directed inwardly through the wall into the interior of the reaction column;
further wall means forming a second annular chamber surrounding the firstnamed annular chamber; and
means for introducing water into said second annular chamber to be heated by heat from said first-named annular chamber.
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Accused Products
Abstract
Apparatus and system for producing coal gas from coal, air and water. Pulverized coal is introduced into a rising stream of air and steam in a retort to constitute a fluidized or entrained bed. The coal reacts with the steam and air to form a gas consisting of hydrogen, carbon monoxide, carbon dioxide, nitrogen, methane and higher hydrocarbons. In some cases the air may be eliminated to produce nitrogen-free gas. In other instances, the production of methane and higher hydrocarbons may be suppressed to produce a gas consisting primarily of hydrogen and carbon monoxide. The retort is constructed so that product gas and air may be burned in an annular space surrounding the central reaction column to produce hot flue gas. Steam tubes may be disposed in the annular space so that the steam and air introduced to the central reaction chamber may be super-heated by the hot flue gas. A further annular space or "wet wall" may be provided surrounding the first annular space through which the intake water is passed, so that the intake water may be brought to a boiling point and converted to steam prior to its being introduced into the steam superheating tubes. This construction causes the walls to the retort to be maintained at a higher temperature than the reaction inside the column, so that all the heat radiated from the walls of the reaction column is directed inwardly, and no heat is lost through the walls. The product gas from the retort is then cooled and passed through a water spray which cools the gas to nearly room temperature, and removes all the fly ash and other particulate matter from the gas.
11 Citations
8 Claims
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1. Apparatus for producing coal gas comprising:
- a retort having a central reaction column surrounded by a wall and having an outlet for hot coal gas produced by the reaction column;
means for introducing pulverized coal, or the like, into the reaction column;
wall means forming an annular chamber surrounding said first-named column in coaxial relationship therewith;
burner means coupled to said annular chamber;
means for introducing combustible gas and air into the annular chamber to be burned by said burner means so as to produce hot flue gas passing through the annular chamber for maintaining the wall of the reaction column at a temperature higher than the interior temperature of the reaction column so that heat is directed inwardly through the wall into the interior of the reaction column;
further wall means forming a second annular chamber surrounding the firstnamed annular chamber; and
means for introducing water into said second annular chamber to be heated by heat from said first-named annular chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a retort having a central reaction column surrounded by a wall and having an outlet for hot coal gas produced by the reaction column;
Specification