Abstract:
An apparatus for gasifying coal dust has a housing provided with an output fitting for the removal of generator gas and an output fitting for the removal of granulated slag. An overflow maintains a body of liquid in the bottom of the housing and a coal-dust burner in the housing forms a downwardly moving coal-dust flame in an upper reaction zone of the housing. An annular tube wall in the housing upper and lower ends where its tubes are bent apart and form radially throughgoing upper and lower openings and at the burner and therebelow but above the generator-gas output fitting. This tube wall is radially gastight between its upper and lower openings and radially inwardly delimits an axially extending annular passage that is outwardly defined by the housing. Steam is fed to the upwardly directed lances in the passage to create in the housing a toroidal annular current of moving gas and steam rising in the passage and descending in the zones between the flame and the tube wall. A coolant is circulated in the tube wall to cool the current of gas to below the softening temperature of any slag in the flame.
Abstract:
A thermal shielding for covers and bottoms of gas generators and other reaction vessels intended to operate at elevated temperature and pressure is disclosed wherein the cover or bottom comprises an extension, integral with the reaction vessel, with an outer closure supporting a plurality of spaced guide tubes having fluid jackets at the inner ends thereof, the fluid jackets of a plurality of circumferentially spaced guide tubes being interconnected by concentrically spaced heat transfer tubes substantially aligned with the inner surface of the reaction vessel, the fluid jacket of one of said guide tubes being divided by baffle means into separate chambers respectively connected with supply and discharge lines for cooling fluid to be circulated through said plurality of fluid jackets and concentric connecting tubes whereby effective cooling is achieved at inner ends of said guide tubes with a minimum of congestion externally of the vessel cover or bottom. In instances where there is need for a guide tube centrally of the cover or bottom, such guide tube has a fluid jacket at the inner end thereof which closely engages fluid jackets of the circumferentially spaced guide tubes and is provided with separate supply and discharge lines for cooling fluid. The space surrounding the guide tubes between the outer closure and heat transfer tubes is preferably filled with heat insulating material.
Abstract:
Dust-laden hot product gas under pressure is admitted into a vessel suspended in a water bath. It escapes through openings in the top of the vessel and the rising bubbles are intercepted by upright tubes through which they cause a flow of water to effect a turnover of the bath. This causes the gas to become cooled, dust to be scrubbed from it and the gas also to become saturated with water vapor.
Abstract:
A device for utilizing combustion, residual and waste materials containing carbon and ash by gasification with an oxygen-containing oxidizing agent at temperatures above the melting point of the inorganic parts in a reaction chamber and at a pressure between ambient pressure and 60 bar. The reaction chamber contour is formed in part by a refractory-grade lining and in part by a cooling system comprising cooling coils connected in a gas-tight manner. The coils are coated with a thin layer of a ceramic mass that conducts heat well on a side facing the reaction chamber. The cooling coils are operated, while being cooled by pressurized water, below or above the boiling point of the cooling water.
Abstract:
A reactor (7) for gasifying materials that contain carbon under pressure has a tube wall (20) that has coolant flowing through it and is lined with a refractory material (21). The outlet (9) from the reactor (7) points down and opens into a cooler (10). The reactor is accommodated in a pressurized vessel (1) along with the cooler (10) and can be released and removed independently.
Abstract:
The reactor for the production of CO and H.sub.2 containing gases by means of a partial oxidation of powdery or liquid high ash fuels in a carburation fluid including free oxygen, at high temperatures and increased pressure, includes a pressure vessel enclosing a gas-tight housing whereby an interspace is formed between the inner wall of the vessel and the outer surface of the housing. Within the housing is arranged a cooling wall enclosing the reaction chamber proper. The cooling wall includes a coil of cooling pipes embedded in a mass of refractory material such as silicium carbide. The pipes are partially supported on web sections projecting from the inner surface of the housing into the refractory lining. The web sections prevent propagation of leaking hot gas from the reaction chamber along the inner surface of the housing.