274results about "Hydrogen separation using liquid contact" patented technology

The present application relates to hydrogen production technology field, especially to a kind of methanol hydrogen production method, comprising the following steps: S10: methanol water is heated and vaporized to obtain methanol water vapor;S20: methanol reforming reaction obtains hydrogen mixture gas;S30: after cooling treatment to hydrogen mixture gas, through water washing tower absorption unreacted methanol water, then, adjust the relative humidity and temperature of hydrogen mixture gas;S40: hydrogen mixture gas is input into carbon dioxide absorption tower to remove carbon dioxide;S50: after removing carbon dioxide, product hydrogen is obtained and input hydrogen tank storage to supply user end.The above-mentioned methanol hydrogen production method, by methanol water vapor reforming hydrogen treatment, obtains hydrogen mixture gas.Again, hydrogen mixture gas is purified to obtain product hydrogen with very low carbon monoxide content, with raw material easy to transport, the hydrogen purity of output is high, equipment construction cost is low, and energy consumption is low and the like advantages, reach the purpose of expanding hydrogen application range.

The invention discloses a low-pressure gas hydrogen recycling device in a diesel hydrogenation preparation process, belongs to the technical field of low-pressure gas recycling, and provides the following scheme that the low-pressure gas hydrogen recycling device comprises a desulfurization mechanism, and a pressurization mechanism is arranged on the desulfurization mechanism; the hydraulic assembly is driven by the control assembly to conduct hydraulic transmission, so that the sealing plug can move, the sealing plug moves to conduct pressurization operation on a closed space formed by the spiral flow guide channel and the spray head set, and after pressurization is conducted for a period of time, the exhaust assembly makes contact with a baffle to be automatically opened for exhausting; the connecting assembly drives the exhaust assembly to be opened to realize flowing of low-pressure separation gas, so that the control assembly is matched with the hydraulic assembly to drive the sealing plug to switch between pressurization and depressurization in a reciprocating manner, gas-liquid mass transfer is accelerated during pressurization, and more low-pressure separation gas enters a liquid phase to react with a desulfurizing agent; and during pressure reduction, part of gas dissolved in the liquid phase escapes to break original gas-liquid balance and promote more low-pressure gas to enter the liquid phase from the gas phase, so that the mass transfer efficiency is further improved, and the desulfurization reaction is enhanced.

The acid removal system comprises a shift gas washing tower, a medium-pressure flash tower, a CO2 desorption tower, an H2S concentration tower, an N2 gas stripping tower, a thermal regeneration tower, a methanol-water separation tower and a tail gas washing tower which are sequentially communicated through a first pipeline, the lower end of the shift gas washing tower is communicated with a shift gas pipe which is communicated with the top of the medium-pressure flash tower through a second pipeline, and the top of the shift gas washing tower is communicated with a PSA hydrogen production device through a third pipeline; the CO2 desorption tower is sequentially communicated with the compressor and the urea production part through a fourth pipeline; the comprehensive automation level of the acid removal device can be improved, and the operation labor intensity is reduced; the operation stability of the acid removal device is improved, and the standard deviation of each key process parameter is reduced.

The invention relates to the technical field of oil residue ammonia production tail gas treatment, in particular to an oil residue ammonia production tail gas treatment device and a tail gas treatment method.The oil residue ammonia production tail gas treatment device comprises a base, a large-particle filtering unit is fixedly installed on the upper side of the base, and a heat exchange assembly is fixedly installed on one side of the large-particle filtering unit; a spraying purification assembly is fixedly installed on one side of the heat exchange assembly, a purified gas conveying pipe is fixedly installed on the upper side of the spraying purification assembly, a gas conveying opening of the spraying purification assembly is fixedly connected with the heat exchange assembly, and a hydrogen extraction assembly is fixedly installed at an exhaust opening of the heat exchange assembly; the output end of the driving motor drives the lifting screw rod to rotate, the lifting screw rod drives the sleeve to move, inflated gas is compressed to reach set pressure, gas containing hydrogen is subjected to permeability extraction through the polyimide film, hydrogen in tail gas is extracted, and the purpose that the hydrogen in the tail gas is extracted is achieved. And the problem of resource waste caused by direct emission of hydrogen is avoided.

A hydrocarbon stream is combusted within a reactor to produce soot and syngas. Sub-stoichiometric combustion of the hydrocarbon stream within the reactor converts at least 10% of the carbon in the hydrocarbon stream into soot. The syngas is mixed with a steam stream to produce a hydrogenation feed stream. A shift reactor converts at least a portion of the carbon monoxide and steam to carbon dioxide and hydrogen to produce a shifted gas stream. Water is separated from the shifted gas stream to produce a dehydrated gas stream. The dehydrated gas stream is separated to produce a hydrogen product stream and a recycle stream. The recycle stream is recycled to the reactor.

The present application provides an apparatus and method for recovering nitrogen discharged from waste water by washing with liquid nitrogen, comprising: a U-tube circulating water heater, a first pipeline, and a second pipeline. The inlet end of the U-tube circulating water heater is connected to the middle section of the second pipeline through the first pipeline, and the outlet end is used to connect to the fuel gas pipeline network; one end of the second pipeline is connected to the hydrogen separator; a control valve and a shut-off valve are provided on the second pipeline, and the control valve is located between the first pipeline and the hydrogen separator, and the shut-off valve is located between the first pipeline and the end of the second pipeline away from the hydrogen separator. The present invention effectively recovers CO in the discharged nitrogen. Each set of equipment can recover more than 170 NM3 / h of fuel gas and 100 NM3 / h of effective gas, with an annual benefit of more than 640,000 yuan, and a significant energy-saving effect. At the same time, due to the reduction of cold torch discharge, steam consumption is indirectly saved, and the phenomenon of long-term ice accumulation in the buffer tank is completely eliminated, which greatly improves the sanitation around the buffer tank and on the ground.

A process for the production of hydrogen comprises: a first steam reforming step of a feedstock containing hydrocarbons to obtain a first synthesis gas; a first synthesis gas shift and cooling step on the first synthesis gas; a separation step for separating the first synthesis gas into a high concentration hydrogen stream and a tail gas stream; a second low pressure steam reforming step performed on the tail gas to obtain a second synthesis gas; a second synthesis gas shift and cooling step on the second synthesis gas; a CO2 removal step performed on the stream of hydrogen and carbon dioxide exiting the second synthesis gas shift and cooling step in order to separate a CO2 stream from a fuel grade hydrogen stream; a step of feeding at least a part of the fuel grade hydrogen stream to the first steam reforming step.

A process for producing hydrogen from a syngas stream is provided in which carbon dioxide is removed from the syngas stream by absorption. After carbon dioxide has been desorbed from the absorption medium, the absorption medium present in the resulting carbon dioxide stream is removed by adsorption on the solid adsorbent, for example due to the molecular sieve effect. A portion of the thus obtained carbon dioxide stream now free of the absorbing medium is heated and used to regenerate the loaded solid adsorbent. The invention further provides a device for carrying out the method according to the invention.

The utility model relates to a hydrogen purification device which comprises an impurity removal device, a water removal device and a base, a second breather pipe on the upper right portion of the impurity removal device penetrates through a pipeline notch in the lower left side of the water removal device to enter the water removal device, the impurity removal device and the water removal device are fixed on the base, and a water injection hole is formed in the upper left portion of the impurity removal device. The water removal device is provided with a shell, and the left side of the impurity removal device is provided with a third ventilation pipe, a sulfuric acid injection port and a sulfuric acid outlet from top to bottom. The engine drives the stirring shaft, the stirring blades, the water inlet and the water outlet to cooperate with each other to improve the impurity removal rate, and the first air suction fan and the second air suction fan cooperate with the second breather pipe and the third breather pipe, so that the hydrogen collection rate is improved while the hydrogen collection is more sufficient and thorough. Conditions of concentrated sulfuric acid and the second breather pipe are observed through the visible port, and the situation that water contained in hydrogen is not removed due to the fact that the second breather pipe is not immersed by the concentrated sulfuric acid is prevented.

The present invention relates to a process for treating a stream comprising CO2 and H2, the process comprising (i) preparing a stream comprising CO2 and H2; (ii) treating the stream prepared in (i) with one or more liquid amine-containing streams, obtaining a gaseous H2-containing stream and a liquid CO2-loaded amine-containing stream; (iii) expanding the liquid CO2-loaded amine-containing stream, obtaining one or more gaseous CO2-containing streams and a liquid CO2-reduced amine-containing stream; (iv) optionally dividing the liquid CO2-reduced amine-containing stream into a first liquid CO2-reduced amine-containing stream and a second liquid CO2-reduced amine-containing stream; (v) stripping CO2 from the liquid CO2-reduced amine-containing stream obtained from (iii) or from the first liquid CO2-reduced amine-containing stream obtained from (iv), obtaining a liquid CO2-depleted amine-containing stream and a gaseous CO2-containing stream; (vi) preparing a liquid H2O-containing stream; (vii) transferring heat from the liquid CO2-depleted amine-containing stream to the liquid H2O-containing stream, obtaining a cooled amine-containing stream and a heated H2O-containing stream; (viii) expanding the heated H2O-containing stream, obtaining a gaseous H2O-containing stream and a liquid H2O-containing stream; (ix) recycling at least a part of the liquid H2O-containing stream into the H2O-containing stream prepared in (vi).

A method comprising partially condensing and separating a feed stream comprising helium and hydrogen to produce a first medium-pressure vapor stream and a first medium-pressure liquid stream; reducing the pressure of the first medium-pressure liquid stream or a stream derived from the first medium-pressure liquid stream to produce a low-pressure vapor stream and a low-pressure liquid stream; cooling the first medium-pressure vapor stream by indirect heat exchange against the low-pressure liquid stream to produce a first partially condensed medium-pressure stream; and separating the first partially condensed medium-pressure stream to produce a second medium-pressure vapor stream and a second medium-pressure liquid stream.

There are provided systems and methods for using fuel rich partial oxidation to produce an end product from waste gases, such as flare gas. Lambda sensor modifications and other control parameters that provide closed-loop mixture control at extremely fuel-rich operating conditions utilizing feed-forward and feedback approaches, physics-based engine models, novel use of a lambda sensor (02-based sensor), sensors with intermittent contact with the gas stream. In an embodiment the system and method use air-breathing engines having control systems, control parameters, sensors and input / output (I / O) for the fuel rich (ER of 1.2 and greater), partial oxidation of the flare gas to form syngas. In embodiments the syngas is further converted into an end product. In an embodiment the end product is methanol.

The present application relates to a process for producing synthetic ammonia by using hydrogen-containing tail gas, comprising the following steps: S1: sodium cyanide tail gas is pressurized, then heated and water-cooled. S2: the impurity-removed tail gas is desulfurized. S3: the desulfurized tail gas is mixed with chlor-alkali tail gas, the mixed gas is heated and deoxidized. S4: the deoxidized tail gas is pressurized and enters a PSA (pressure swing adsorption) device for pressure swing adsorption treatment, obtaining high-purity hydrogen. In the PSA device, dehydrating, carbon dioxide, methane, carbon monoxide and nitrogen adsorbents are sequentially arranged. The carbon dioxide adsorbent is activated carbon modified by carbonate and strong alkali, and the nitrogen adsorbent is 13X zeolite molecular sieve modified by Na + and Ba 2+ and Ca 2+ ion exchange. S5: nitrogen reacts with the high-purity hydrogen obtained in step S4 to generate ammonia. The present application can improve the adsorption capacity of the adsorbent for impurity gas, thereby reducing the replacement frequency of the adsorbent, prolonging the service period and service life of the adsorbent, and improving the production efficiency.

A method and apparatus is provided for producing hydrogen in an steam methane reformer (SMR) via ammonia cracking, wherein the SMR can include a furnace (50), a pressure swing adsorption (PSA) unit, waste heat recovery sections (10, 90), and a water scrubber, wherein the furnace (50) has a plurality of SMR tubes and a plurality7 of burners. The method can include the steps of: withdrawing ammonia from an ammonia storage vessel; preheating the ammonia to form a warm ammonia stream; introducing the warm ammonia stream into the SMR tubes of the furnace (50) under conditions effective for catalytically cracking the ammonia, thereby forming a crude stream (53) comprising hydrogen, nitrogen, and unreacted ammonia; treating the crude stream (53) with a water wash in order to remove the unreacted ammonia from the crude stream (53), thereby resulting in an aqueous ammonia stream and a washed crude stream (103); and introducing the washed crude stream (103) into the PSA unit to produce a hydrogen product stream and a PSA off-gas.

The invention relates to a method for providing a hydrogen stream (7) in a plant (2) for providing the hydrogen stream (7), wherein a carbon-containing energy carrier stream (3) is fed to a synthesis gas reactor arrangement (4) for obtaining a synthesis gas stream (5) comprising hydrogen and carbon oxides, wherein the synthesis gas reactor arrangement (4) obtains the synthesis gas stream (5) from the energy carrier stream (3) by autothermal reforming, wherein the synthesis gas stream (5) is fed to a shift device (15a-c), wherein a water gas shift reaction takes place in the shift device (15a-c) for converting at least part of the carbon monoxide of the synthesis gas stream (5) with steam of the synthesis gas stream (5) into carbon dioxide and hydrogen,wherein the synthesis gas stream (5) is fed downstream of the shift device (15a-c) to a carbon dioxide scrubber (30) for scrubbing at least a portion of the carbon dioxide from the synthesis gas stream (5), wherein a flash gas stream is released from a regeneration stage of the carbon dioxide scrubber (30), which flash gas stream is fed to a heating device of the plant (2) for underfiring, wherein the synthesis gas stream (5) is fed downstream of the carbon dioxide scrubber (30) at least partially to a separation arrangement (6) for separating the synthesis gas stream (5) at least into a hydrogen stream (7) containing hydrogen and into an exhaust gas stream (8) containing carbon oxides. The method is characterized in that the energy carrier stream (3) is fed to a saturation stage (11) before being fed to the synthesis gas reactor arrangement (4), in which saturation stage (11) preheated condensate (12) is added to the energy carrier stream (3),which has accrued in the plant (2), and that a vapor content of at least 80% of the synthesis gas stream (5) is already present when fed to the shift device (15a-c) when the synthesis gas stream (5) exits the synthesis gas reactor arrangement (4). The invention also relates to a corresponding plant (2) for providing a hydrogen stream (7),

The utility model provides a water electrolysis product gas cleaning device and a water electrolysis system, and relates to the field of hydrogen production through water electrolysis. The water electrolysis product gas cleaning device comprises a separation tank and a mixing assembly, the mixing assembly is used for receiving to-be-cleaned product gas and fresh make-up water, the mixing assembly is used for mixing the to-be-cleaned product gas and the fresh make-up water to form a mixture, the mixing assembly communicates with the separation tank through a first channel, and the first channel is used for guiding the mixture into the separation tank; and the separation tank is used for separating clean product gas from the mixture. The mixing assembly is used for replacing filler in a traditional separation tank, the requirement for the large operation range of coupling of an electrolytic bath and renewable energy sources can be met, meanwhile, the mixing assembly is arranged outside the separation tank, filler does not need to be arranged in the separation tank, and therefore the overall height of the cleaning device for the water electrolysis product gas is reduced, and the cleaning device adapts to the low height limit requirement; and the application range is wider.

The utility model discloses a system for recycling pressure swing adsorption desorbed gas in ethylene glycol synthesis, which comprises a pressure swing adsorption desorbed gas buffer tank, a desorbed gas supercharger and a conversion system, an outlet of the pressure swing adsorption desorbed gas buffer tank is connected with the desorbed gas supercharger, the desorbed gas supercharger is connected with the conversion system, and the conversion system comprises a conversion furnace. After pressure swing adsorption desorption gas is pressurized, separation is carried out through a conversion system, fresh hydrogen and purge gas are obtained, and recycling of hydrogen is achieved; according to the utility model, the transformation system is arranged to convert the pressure swing adsorption desorption gas into hydrogen, so that the waste gas is recycled, the emission of pollutants can be reduced, and the air quality can be improved. Meanwhile, waste gas recycling can reduce energy consumption and reduce waste treatment cost, so that the overall production cost is reduced, and economic benefits are improved.

Systems and methods for producing hydrogen with reduced carbon intensity by generating work from expansion of high-pressure produced hydrogen. An expander with a rotating output shaft can be used to convert the expansion of hydrogen into useful work in the form of rotation (torque) of the output shaft, and also utilizes the low temperature of expanded hydrogen as a cooling media to cool a process fluid such physical solvent(s) used for CO2 removal.

A hydrogen feed stream comprising one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, oxygen, and water, is purified using a cryogenic temperature swing adsorption (CTSA) process with high overall recovery of hydrogen. The waste gas from regenerating the CTSA may be used to improve the performance of upstream hydrogen processing steps.

The invention provides an apparatus and method for producing a hydrogen rich gas, the method comprising the steps of reforming a hydrocarbon feed in an autothermal reformer to obtain a synthesis gas; shifting the synthesis gas in a shift configuration comprising a high temperature shift step; removing CO2 in a CO2 removal section by amine washing to form a hydrogen rich stream, wherein a portion is used as a low carbon hydrogen fuel; and forming a CO2 rich gas stream and a high pressure flash gas stream. The high pressure flash gas stream is advantageously integrated into the apparatus and method to further improve carbon capture.

A hydrogen generation assembly and method are disclosed. In one embodiment, the method includes receiving a feed stream at a fuel processing assembly and heating a hydrogen-producing region of the fuel processing assembly to at least a minimum hydrogen-producing temperature via one or more burners. The method additionally includes generating an output stream in the heated hydrogen-producing region of the fuel processing assembly from the received feed stream and generating a product hydrogen stream and a by-product stream from the output stream in a purification region of the fuel processing assembly. The method further includes separating at least a portion of the carbon dioxide gas from the by-product stream to generate a fuel stream having a lower carbon dioxide concentration than the by-product stream and supplying the fuel stream to the one or more burners.

The present invention relates to a process for removing carbon dioxide from a synthesis gas having at least hydrogen and carbon dioxide in which the synthesis gas is at least partially freed of carbon dioxide in an absorption apparatus by physical absorption at elevated absorption pressure. The carbon dioxide is subsequently desorbed by pressure reduction relative to the absorption pressure in a plurality of serially arranged flash stages and an at least partially regenerated absorption medium is withdrawn from the last of the plurality of serially arranged flash stages, recompressed to absorption pressure and recycled into the absorption apparatus for use as absorption medium. It is also provided according to the invention that a partially regenerated absorption medium from a flash stage upstream of the last of the plurality of serially arranged flash stages is recompressed to absorption pressure and recycled into the absorption apparatus for use as absorption medium.

The subject of this invention is the system for generation and use of hydrogen in which a subsystem for hydrogen generation (U1) contains a reaction chamber (1) with aluminium (2) and sodium hydroxide (3), to which a water nozzle (4) is attached, connected through a duct (5) to a water pump (6). The upper part of the reaction chamber (1) contains an outlet connection (7) connected to a subsystem for hydrogen purification (U2), which is connected to the subsystem for hydrogen oxidation (U3), to which an inlet (27) through oxygen is supplied, is connected. This system is characterised in that the subsystem for hydrogen purification (U2) contains at least one water tank (9) connected to the subsystem for hydrogen oxidation (U3), which outlet (21) is connected through a non-return valve (22) with the condensing tank (23).

The application provides an underground gasification and electrolysis water coupling zero-carbon hydrogen production system and a resource comprehensive utilization method, which can effectively reduce the production cost of electrolytic hydrogen production, make full use of oxygen generated by electrolysis while providing suitable water sources, and make hydrogen energy more widely and practically applied; carbon monoxide produced by underground coal gasification and separated and purified is used as a circulating medium in the process of electrolytic hydrogen production, which can reduce a part of hydrogen production power consumption, and carbon dioxide and oxygen generated by the anode of the electrolytic cell can be used as a gasification agent in the gasification process or a combustion-supporting agent in the power generation process, and the carbon dioxide produced by the power generation device can also be injected into the underground gasification furnace as a gasification agent; while reducing the cost of high-purity gasification agent preparation and transportation, the condensate water of the synthesis gas after treatment can be reasonably utilized, and then the underground coal gasification technology and the existing electrolytic water hydrogen production process are combined to create a new zero-carbon hydrogen production system with a fusion of technical systems and efficient utilization of resources.

A method of separating and reusing unconverted ammonia from cracked ammonia gas provided by an ammonia cracking unit is provided. The method includes introducing a cracked ammonia gas stream into a water wash column, thereby producing a clean gas stream and a water-containing effluent stream and introducing the water-containing effluent stream into a stripping column, thereby producing a cleaned wash water stream and a recovered ammonia stream. Wherein the cracked ammonia gas stream has an ammonia concentration of between 0.003 mol % and 10 mol %. Wherein the clean gas stream has an ammonia concentration of between 1 ppm and 2500 ppm. And wherein at least a portion of the recovered ammonia stream is used as fuel within the ammonia cracking unit.

The invention discloses a high-efficiency low-energy-consumption solvent for removing organic sulfur in gas as well as a preparation method and application of the high-efficiency low-energy-consumption solvent, and belongs to the technical field of gas purification. The solvent is formed by compounding a physical absorption organic solvent, a chemical absorption alcohol amine solution and a nitrogen-doped activated carbon catalyst nanofluid. The nitrogen-doped activated carbon catalyst is prepared by taking coconut shell or shell activated carbon as a raw material, mixing the coconut shell or shell activated carbon with a high-content nitrogen compound, pickling, drying, grinding and calcining by a specific procedure, and the surface of the nitrogen-doped activated carbon catalyst is rich in nitrogen-containing functional groups. When the catalyst is dispersed in an alcohol amine-organic solvent mixed system, a stable carbon nanofluid can be formed, and the heat transfer and mass transfer performance of the system can be remarkably improved. The solvent integrates the advantages of physical absorption and chemical absorption, and shows high absorption capacity and rate in the desulfurization process by virtue of the synergistic effect of the nanofluid; in the regeneration process, the heat and mass transfer efficiency is improved, so that the energy consumption is obviously reduced, and the method is particularly suitable for treating industrial gas containing organic sulfur.

The invention discloses a hydrogen recovery device and method for PTA (pure terephthalic acid) production, the hydrogen recovery device comprises a first cooler and a first gas-liquid separation tank, the outlet end of the first cooler is connected with the first gas-liquid separation tank, the first gas-liquid separation tank is connected with a hydrogen recovery washing tower through a pipeline, the bottom of the hydrogen recovery washing tower is connected with an acid recovery device through a pipeline, and the acid recovery device is connected with the acid recovery device through a pipeline. The top of the hydrogen recovery washing tower is connected with a second cooler through a pipeline; the hydrogen recovery washing tower is connected with the oxidation device through a conveying pump so as to convey acid into the hydrogen recovery washing tower, and hydrogen-rich steam is sequentially subjected to acid pickling and desalted water spraying from bottom to top in the hydrogen recovery washing tower; the invention aims to provide the hydrogen recovery device and method for PTA (pure terephthalic acid) production, so that the content of methyl acetate and methanol in the hydrogen recovery process is reduced, the purity of hydrogen is improved, and the production cost is reduced.

The invention discloses a process and system for separating and purifying hydrogen in sulfur-iodine circulating hydrogen production, and relates to the technical field of sulfur-iodine circulating hydrogen production, and the process comprises hydrogen iodide gas preheating, hydrogen iodide gas decomposition, gas heat recovery and cooling, pressurized separation, cryogenic separation, spraying absorption, and completion of hydrogen separation and purification. Multi-stage heat energy recovery is adopted, and the total energy consumption of the system is greatly reduced; complete recovery of the materials is achieved; hydrogen iodide liquefaction is assisted in a pressurization and copious cooling combined mode, energy consumption is greatly reduced, pressurization is generally needed when hydrogen is applied downstream, the hydrogen is pressurized in advance during separation and purification, and energy consumption needed by follow-up pressurization is reduced; materials except water are not added, so that impurities are avoided; and the undecomposed hydrogen iodide is circularly limited in the hydrogen separation process, so that the circulating energy consumption of other units of the system is reduced.

To provide systems and methods for processing gases.SOLUTION: The present invention provides a system for transforming a hydrocarbon-containing inflow gas into outflow gas products, where the system includes specified components.SELECTED DRAWING: None