PROCESS FOR THE PURIFICATION OF GAS GENERATED IN THE PRESSURE FICATION OF COAL

• Main Authors: IGELBUSCHER, HEINRICH, GRESCH, HEINZ, HOLTER, HEINZ
• Format: Patent
• Language: English; French
• Published: 10.07.1979
• Subjects: BLASTING; CARBURETTING AIR OR OTHER GASES; CHEMISTRY; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS; FUELS; HEATING; LIGHTING; LUBRICANTS; MECHANICAL ENGINEERING; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLEGASES CONTAINING CARBON MONOXIDE; TECHNICAL GASES CONTAINING CARBON MONOXIDE; WEAPONS

A process for the purification of gas, which is generated in pressure gasification of coal, which uses a wash oil, especially tar oil, as the washing liquid to avoid clogging of the washing apparatus by tars and tar compounds which precipitate out of the washing liquid when water or aqueous solutions are employed as the washing liquid. The wash oil is preferably used in the circulation, from which solids and tars are continuously removed, and is then again fed into the pressure reactor. The wash oil circulation is continually regenerated through distillation and the residues are fed into the pressure reactor. Heat is constantly extracted from the gas before or during the washing in a heat exchange process making it possible to keep the heat loss extremely low and to create optimum temperature at every point of the total cycle by appropriate extraction or addition of heat. The heat extracted may be used for generation of steam, which is fed into the pressure reactor, into the distillation process for the regeneration and purification of the wash oil, and/or into the discharging flow of purified gas. Desirably the gas is also brought into contact with separating materials such as alkali, earth alkali, dolomite, etc., for the purpose of separating hydrogen sulfide.