摘要:
A process for advantageously efficiently treating a sulfureous combustible effluent stream by recovering the sulfur in elemental form comprises a step of combustion of the sulfureous combustible effluent stream with an oxidant gas in excess, and then a step of post-combustion of the effluents from the combustion step with an acidic gas. The stream of the post-combustion effluents, free of chemical compounds that are harmful to the efficacy of the Claus catalysts, is treated in a Claus unit, which performs the recovery of the sulfur in elemental form.
摘要:
Apparatus and process for the catalytic gaseous phase reaction of a feed gas mixture. The apparatus includes a reactor having two ends which alternately serve as an inlet for the feed gas mixture and as an outlet for reacted gas and two stationary heat exchange/reaction zones connected by a center zone. Each of the heat exchange/reaction zones contains a layer of catalyst and the center zone contains a feed gas mixture inlet. A first distribution/collection zone is between one of the heat exchange/reaction zones and one of the ends of the reactor and a second distribution/collection zone is between the other heat exchange/reaction zone and the other end of the reactor. In the process, the heat exchange/reaction zones are alternately heated and cooled by periodically reversing the direction of flow of gas through the reactor. As an intermediate step in each complete reversal of the direction of flow of gas through the reactor, the feed gas is introduced into the center zone and reacted in the heat exchange/reaction zone which was being heated immediately prior to the intermediate step, reacted gas is discharged from the end of the reactor which served as the reacted gas outlet immediately prior to the intermediate step, unreacted feed gas trapped in the distribution/collection zone between the heat exchange/reaction zone which was being cooled and the end of the reactor which served as the feed gas inlet immediately prior to the intermediate step is displaced to the center zone, and the displaced unreacted gas is combined with feed gas mixture being introduced into the reactor.
摘要:
Sour syngas treatment apparatuses and processes for treating a sour syngas stream are provided herein. In an embodiment, a process for treating a sour syngas stream that includes sulfur components and carbon dioxide includes absorbing the sulfur components and carbon dioxide from the sour syngas stream in a primary liquid/vapor phase absorption stage with a solvent to produce a liquid absorbent stream. The liquid absorbent stream includes the solvent, the sulfur components, and carbon dioxide. A portion of the sulfur components from the liquid absorbent stream is directly oxidized in the presence of a direct oxidation catalyst to produce elemental sulfur and a recycle stream. The recycle stream includes an unconverted portion of the sulfur components and carbon dioxide. The recycle stream is recycled for further absorption of the unconverted portion of the sulfur components and carbon dioxide through liquid/vapor phase absorption.
摘要:
Novel sulfur recovery plants, and processes utilizing these plants are disclosed. These apparatuses eliminate the use of a condenser between the waste heat boiler and first Claus catalytic reactors, and also eliminate the use of reheaters in between Claus catalytic reactors.
摘要:
Apparatus for recovery of sulfur from hydrogen sulfide is described in which the catalyst chambers, condensing and boiler sections, and liquid-gas separator compartments are serially arranged. A separate condensing section is provided for each of the catalyst chambers while sulfur produced in the boiler is condensed in the second pass tubes comprising the boiler section, and flows into a separator compartment. Liquid sulfur seals connect the separator compartments, and liquid sulfur is discharged from one of them.
摘要:
Sour syngas treatment apparatuses and processes for treating a sour syngas stream are provided herein. In an embodiment, a process for treating a sour syngas stream that includes sulfur components and carbon dioxide includes absorbing the sulfur components and carbon dioxide from the sour syngas stream in a primary liquid/vapor phase absorption stage with a solvent to produce a liquid absorbent stream. The liquid absorbent stream includes the solvent, the sulfur components, and carbon dioxide. A portion of the sulfur components from the liquid absorbent stream is directly oxidized in the presence of a direct oxidation catalyst to produce elemental sulfur and a recycle stream. The recycle stream includes an unconverted portion of the sulfur components and carbon dioxide. The recycle stream is recycled for further absorption of the unconverted portion of the sulfur components and carbon dioxide through liquid/vapor phase absorption.
摘要:
Novel sulfur recovery plants, and processes utilizing these plants are disclosed. These apparatuses eliminate the use of a condenser between the waste heat boiler and first Claus catalytic reactors, and also eliminate the use of reheaters in between Claus catalytic reactors.