63 results about "Claus process" patented technology

The invention provides a method for treating claus technical tail gas. The method comprises the following steps of: continuously feeding the claus technical tail gas containing sulfur dioxide, oxygen and water into a reactor filled with a multihole carbon desulfurizing agent; generating catalytic oxidation reaction between the sulfur dioxide and the water in the tail gas on the surface of multihole carbon at the reaction temperature between 30 and 150 DEG C; and continuously introducing regenerative detergent into the reactor. By the method, adsorption, catalytic oxidation and desorption are synchronously carried out on low-concentration sulfur-containing waste gas in the claus technical tail gas which is difficult to treat; oxygen and water in the tail gas can be fully used; under the condition that oxygen is not required to be swelled and the water is not required to be compensated, standard discharging can be realized and sulfur resources can be recycled; an obtained by-product is dilute sulphuric acid which can be directly used in industrial production or used in the industrial production after being concentrated; the multihole carbon desulfurizing agent is low in cost and long in service life and can be recycled; the technical flow is simple, and the investment is low; and the running cost is competitive.

A highly efficient desulfurization method for removing a hydrogen sulfide and a sulfur dioxide simultaneously comprises the step of contacting a gas containing the hydrogen sulfide and the sulfur dioxide with water, or an aqueous solution containing a first heterogeneous catalyst for desulfurization to oxidize the hydrogen sulfide with the sulfur dioxide. 3˜5% sulfur-containing tail gas exhausted from, especially, Claus Process can be treated at a high efficiency of over 99%.

The invention relates to a method for treating a Claus process tail gas by adopting a modified adsorbing agent. The method comprises the following steps: (1) immersing an adsorbing agent in a 1-10% metal ion solution, standing, drying after filtering to obtain a modified adsorbing agent; (2) placing the modified adsorbing agent in an adsorbing bed for removing sulfide in the Claus process tail gas; and (3) after the adsorbing agent in the adsorbing bed reaches adsorption saturation, performing regeneration by adopting hot airflow with a temperature of 150-500 DEG C, wherein the regenerated adsorbing agent can be recycled. According to the method, the sulfide in the tail gas of a Claus device is removed by adopting an adsorption-catalysis method, the modified adsorbing agent can be used for simultaneously treating H2S, SO2, COS and CS2 in the Claus process tail gas and recovering the H2S, the SO2, the COS and the CS2 in the Claus process tail gas in a sulphur or sulfuric acid form, and the adsorbing agent reaching the adsorption saturation can be regenerated and recycled.

Disclosed is a method for treating a feed gas stream rich in hydrogen sulfide by partially combusting the feed gas stream rich in hydrogen sulfide with an oxygen-enriched gas in a Claus reaction furnace to produce to a combustion reaction product stream containing sulfur. The combustion reaction product stream is split into a recycle stream and a treatment stream and the recycle stream directed back into the Claus reaction furnace, without first condensing sulfur out of the recycle stream, while the treatment stream is directed into a condenser to condense sulfur out of the treatment stream.

The invention relates to a Claus tail gas condensing treatment process, which comprises the steps that Claus tail gas coming from a Claus process sulfur condenser enters a heat exchanger I, gaseous sulfur is condensed and removed; the gaseous sulfur-removed Claus tail gas is sent to a desulfurizing absorption tower and is sprayed by adopting a doctor solution coming from a gas purification device, rich liquor is returned to the gas purification device for regeneration, and regenerated acid gas is used as a raw material for a Claus process; the upper part of the desulfurizing absorption tower is provided with an alkali washing section, and alkali liquor is a replenishing solution coming from a desulfurizing unit of the gas purification device; after the removal of H2S, the Claus tail gas is sent to a coke oven gas system or is returned to a returned gas system; the heat exchanger I and a heat exchanger II work in a cyclic alternating pattern, and the continuous condensing of the gaseous sulfur in the Claus tail gas is realized. The Claus tail gas condensing treatment process has the remarkable advantages of small investment, low operating cost, energy conservation, greenness, environmental protection and the like.

An improved method and consolidated apparatus for recovery of sulfur from acid gases using the modified-Claus process and Claus tail gas treating process of the hydrogenation/amine absorption type as classically practiced in the oil & gas industry. By implementing innovations to the acid gas processing strategy a wider range of feedstocks can be processed and improved performance is seen when processing conventional feedstocks; in addition, through consolidation and integration of the typical practice an improved apparatus is realized.

A method for recovering sulfur from an acid gas feed is provided. The method comprising the steps of mixing the acid gas feed and an absorption process outlet stream to form a combined Claus feed, introducing the combined Claus feed and a sulfur dioxide enriched air feed to a Claus process to produce a Claus outlet gas stream, introducing the Claus outlet gas stream to a thermal oxidizer, treating the thermal oxidizer outlet stream in a gas treatment unit to produce a dehydrated stream, introducing the dehydrated stream to a membrane sweeping unit to produce a sweep membrane residue stream and a sulfur dioxide enriched air feed, introducing a sweep air stream to a permeate side of the membrane sweeping unit, and introducing the sweep membrane residue stream to a sulfur dioxide absorption process to produce the absorption process outlet stream and a stack feed.

The invention belongs to the field of sulfur recovery, and particularly relates to a sulfur recovery process. Acidic gas containing hydrogen sulfide has Claus reaction to generate sulfur and sulfur production tail gas, the sulfur is recovered, the sulfur production tail gas is mixed with hydrogen and then is sent to a tail gas hydrogenation reduction system to have hydrogenation reduction reaction, then the mixture enters a H2S absorption and solvent oxidation system, H2S in the gas is oxidized to elemental sulfur, and the purified gas is emptied; finally the sulfur and solvent are separated. The process is a novel sulfur recovery and tail gas treatment process formed by combining the Claus process and a liquid-phase oxidation technology, so that the content of hydrogen sulfide in the discharged gas is minimized, the content of H2S in the treated exhausted gas is reduced to 5ppm or less, the equipment investment is less, the process flow is short, the energy consumption is low, the process flow is safe and reliable, and environmental friendliness can b e realized. The invention also provides an apparatus. The apparatus is simple in structure and easy to implement.

The invention relates to a novel static mixer for gas mixing in a natural gas sulfur recovery super Claus process, which can effectively solve the problem of full-mixing incapability in a turbulent mixing process and improve gas mixing effect. The technical scheme is that: a main pipe is a circular steel pipe, while an auxiliary pipe is vertically inserted into the main pipe from a central line of a right semi-circle of the section of the main pipe; an outlet of the auxiliary pipe has a wedged structure; eight blades are arranged in the main pipe; each blade has a circular arc shape, an inclined angle alpha, a rotating angle beta and a height H; an axial interval between every two blades is L; the pipe walls of the main pipe and the auxiliary pipe are 5 to 10mm thick; and the wedged outlet is 5 to 10mm wide. The static mixer can prolong the residence time of gases in the mixture, and improve the turbulence intensity of the gases to further improve the mixing rates of the mixed gases, and can be used for the natural gas purification sulfur recovery super Claus process.

A method for removing sulphur from a fluid by the steps of providing a first fluid comprising a sulphur-containing compound; adsorbing the sulphur of sulphur-containing compound onto an adsorbent; regenerating the adsorbent by oxidation of the adsorbed sulphur to sulphur dioxide thereby yielding an off-gas stream comprising sulphur dioxide; providing a second fluid comprising hydrogen sulphide, using the second fluid and the off-gas stream as reactants in a Claus process for producing elemental sulphur, wherein a part of hydrogen sulphide provided by the second fluid is oxidized to sulphur dioxide and water at reaction temperature, the residual hydrogen sulphide, the resulting sulphur oxide and the sulphur oxide provided by the off-gas stream are converted to elemental sulphur, the oxygen required for the oxidation of the hydrogen sulphide provided by the second fluid is provided by an air stream, and the off-gas stream dilutes the second fluid in the Claus process.

The application relates to a process for the removal of hydrogen sulfide from a gas stream by catalytic direct oxidation without employing the combustion step of a Claus process. The process is particularly suitable for desulfurization of gas streams that contain hydrogen and allows sulfur recovery efficiency of better than 99%.

A horizontal sulfur condenser may include an exterior casing with a plurality of condenser tubes arranged longitudinally within the casing, a liquid sulfur reservoir at a longitudinal end within the exterior casing, and an internal baffle that protrudes into the liquid sulfur reservoir from the surface. The lowest of the plurality of condenser tubes is parallel to a wall of the exterior casing. A Claus process gas inlet is proximate a first end of the plurality of condenser tubes, which are arranged horizontally but are positioned vertically above the sulfur reservoir. A liquid sulfur outlet is located at the liquid sulfur surface. The baffle creates multiple chambers above the sulfur reservoir, such as a first chamber defined by the exterior casing and the baffle to receive condensed Claus sulfur in the liquid reservoir, and a second chamber defined by the exterior casing and the baffle to receive degassed liquid sulfur.

The invention belongs to the technical field of sulfur recovery processes, and particularly relates to an organic sulfur hydrolysis catalyst suitable for a Claus process and a preparation method of the organic sulfur hydrolysis catalyst. The general formula of the perovskite type composite oxide catalyst is ABOx, the perovskite type composite oxide catalyst is synthesized through a hydrothermal method, A is alkali or alkaline earth metal elements and comprises Na, K, Cs, Mg, Ca, Sr and Ba, B is transition metal elements and comprises Ti, Fe and Co, and x is equal to 1.5-3. The material has the characteristics of strong composition and structure adjustability, abundant surface acid-base sites and the like, and has excellent organic sulfur catalytic hydrolysis activity.

The invention relates to a Claus process H2S acid gas catalytic combustion method, and belongs to the technical field of sulfur resource recovery. The catalytic combustion method comprises the following steps that firstly, H2S raw material gas and air with a certain proportion through a premixing system to realize gas mixing; then the mixed gas passes through a hexaaluminate composite oxide catalytic bed layer maintained in a specific temperature range, under the action of the catalyst, H2S is oxidized into SO2 according to the designed amount, NH3 is efficiently catalytically decomposed intoN2, and the hydrocarbon is catalytically oxidized into CO2; and the purification gas of the catalytic bed layer enters a subsequent process to generate a Claus reaction. According to the Claus processH2S acid gas catalytic combustion method, a catalytic combustion method is adopted, ignition and flame burning are not needed, the combustion temperature, the equipment investment and the operation cost can be effectively reduced, and the operation is simple and safe.

Disclosed is a method for treating a gas stream rich in hydrogen sulfide by providing one or more feed gas streams rich in hydrogen sulfide into a Claus reaction furnace, providing air into the Claus reaction furnace, providing supplemental oxygen into the Claus reaction furnace, and providing steam to the Claus reaction furnace, where the steam is in addition to any steam that may be present in gases that are recycled to the Claus reaction furnace. The components are then reacted at a temperature above about 2400° F. and at a pressure sufficient to cause hydrogen sulfide to be converted into sulfur.