초록 ▼

A process is provided for the production of sulphur from at least one sour gas containing H2S and a gaseous or liquid fuel effluent, of the type comprising a thermal reaction step, wherein the thermal reaction step is conducted by performing the combustion of the gaseous or liquid fuel effluent in a

A process is provided for the production of sulphur from at least one sour gas containing H2S and a gaseous or liquid fuel effluent, of the type comprising a thermal reaction step, wherein the thermal reaction step is conducted by performing the combustion of the gaseous or liquid fuel effluent in a first zone of the thermal reaction stage with a quantity of a gas containing free oxygen in excess in relation to the theoretical quantity needed for a complete combustion of the fuel effluent, the excess being smaller than the theoretical proportion of gas containing free oxygen needed to oxidize to SO2 approximately one third of the H2S of the total flow of sour gas into the combustion fumes of the fuel effluent which are present in the first zone of the thermal reaction stage, by burning incompletely a second stream of sour gas in a second zone of the thermal reaction stage, which receives the gaseous products from the first zone, with a controlled quantity of gas containing free oxygen, such that the H2S:SO2 molar ratio in the gases originating from the catalytic reaction step has a predetermined value, and by adjusting the flow rates of the first and second sour gas streams so that the temperature obtained during the incomplete combustion of the second sour gas stream in the second zone of the thermal reaction stage has a value higher than 850°C.

대표청구항 ▼

A process for the production of sulphur from at least one sour gas containing H2S and a gaseous or liquid fuel effluent, which comprises: (i) a thermal reaction step carried out in a thermal reaction stage and consisting of carrying out a controlled oxidation of the H2S in the sour gas and a complet

A process for the production of sulphur from at least one sour gas containing H2S and a gaseous or liquid fuel effluent, which comprises: (i) a thermal reaction step carried out in a thermal reaction stage and consisting of carrying out a controlled oxidation of the H2S in the sour gas and a complete combustion of the fuel effluent to produce a gas stream containing H2S, SO2 and sulphur vapor; (ii) a step of indirect cooling of said gas stream to separate the sulphur therefrom by condensation, and next (iii) a catalytic reaction step carried out on the gas stream originating from the indirect cooling step; and wherein the thermal reaction step comprises: (a) performing the combustion of the gaseous or liquid fuel effluent containing sulfur compounds capable of being oxidized into SO2 and optionally NH3 or HCN in a first zone of the thermal reaction stage with a quantity of a gas containing free oxygen in excess in relation to the theoretical quantity needed for a complete combustion of the fuel effluent, the said excess being smaller than the theoretical proportion of gas containing free oxygen needed to oxidize to SO2 approximately one third of the H2S of the total flow of sour gas to be treated; (b) injecting a first stream of sour gas comprising H2S and containing hydrocarbons into the combustion fumes comprising SO2 of the fuel effluent which are present in the said first zone of the thermal reaction stage; (c) burning incompletely a second stream of said sour gas comprising H2S and hydrocarbons in a second zone of the thermal reaction stage, which receives the gaseous products from the first zone, with a controlled quantity of gas containing free oxygen supplied from outside the thermal reaction stage, such that the gases originating from the catalytic reaction step contain H2S and SO2 in a H2S:SO2 molar ratio of approximately 2:1; and (d) adjusting the flow rates of the first and second sour gas streams so that the temperature obtained during the incomplete combustion of the second sour gas stream in the second zone of the thermal reaction stage has a value nigher than 850°C.