3374 results about "Gas separation" patented technology

Disclosed herein are methods and systems for producing a liquefied methane product from a methane- and carbon dioxide-containing feed stream, in which a plurality of membrane stages comprising gas separation membranes that are more permeable to carbon dioxide than methane are used to remove carbon dioxide from the feed and form a retentate stream that is enriched in methane, said retentate stream being then cooled and liquefied to provide the liquefied methane product. In particular, the disclosed methods and systems may be used for producing liquefied biomethane from a biogas feed.

An integrated carbon honeycomb structure material and its preparation method are disclosed, belonging to the field of carbon materials technology. Based on a co-sacrificial template low-temperature pyrolysis strategy, the target material can be obtained through three main steps: preparation of a metal salt-colloidal microsphere template precursor, precursor pressing and molding, and subsequent calcination and carbonization. This technology has the characteristics and advantages of simple preparation process, regular and controllable macroscopic structure of the sample (such as shape, area, and thickness), rich and tunable chemical composition, and three-dimensional interconnection of graphene carbon matrix. It has great application potential in many fields such as electrochemical energy storage, catalysis, gas separation, adsorption, and electromagnetic shielding.

Disclosed herein are membrane-based gas separation methods and systems. The methods and systems may, in particular, be used for separating a feed stream comprising methane and carbon dioxide (such as for example a biogas feed stream) in order to provide a methane product stream (such as for example a biomethane stream).

The invention discloses a chemical packed tower separation device, which belongs to the technical field of gas separation, and comprises a packed tower main body, and a liquid distribution mechanism is arranged in the packed tower main body close to the top. The bottom of one side of the outer wall of the packed tower main body is fixedly connected with a gas inlet pipeline communicated with the packed tower main body, a vertically arranged transmission mechanism is mounted in the packed tower main body, and a rotation driving mechanism for driving the transmission mechanism to rotate is fixedly mounted at the bottom of the inner wall of the packed tower main body; two groups of grating brackets are fixedly mounted on the inner wall of the packed tower main body, and two groups of gas-liquid exchange mechanisms for placing Pall ring bulk packing are also fixedly mounted on the transmission mechanism. By designing the rotation driving mechanism, the transmission mechanism and the gas-liquid exchange mechanism, in the rotation process of the gas-liquid exchange mechanism, more sufficient reverse contact of gas and liquid phases can be achieved, and the overall contact mass transfer effect is further improved.

A disk-pack turbine for use, for example, in systems and methods in at least one embodiment for separating fluids including liquids and gases into subcomponents by passing the fluid through a vortex chamber into an expansion chamber and then through at least a portion of a waveform pattern present between at least two rotors and / or disks. The rotors and / or disks having waveform patterns on at least one side. In at least one embodiment, the waveform patterns include a plurality of hyperbolic waveforms axially aligned around a horizontal center of the system.

The invention relates to the technical field of fuel cells, in particular to a hydrogen cell water-gas separation device for an unmanned aerial vehicle, which comprises a separation shell, and a cyclone separation cavity, a heat exchange condensation cavity and a hydrogen mixing cavity which are sequentially distributed from bottom to top are arranged in the separation shell. The technical problem that a traditional gas-liquid separator cannot thoroughly remove micron-sized liquid drops is solved, liquid water drops are efficiently removed through the cyclone separation cavity, new hydrogen and wet hydrogen are subjected to heat exchange through the heat exchange condensation cavity, residual liquid drops are sufficiently condensed and separated out, and finally mixed hydrogen with the dryness meeting the requirement is output. And the anode flooding problem of the fuel cell is effectively avoided.

The present application provides a domestic sludge self-sustaining incineration process, comprising primary drying, secondary drying, crushing, and incineration, comprising: performing primary drying on domestic sludge by using dry hot air to obtain sludge having a moisture content of 40% to 55%; then performing secondary drying by using hot flue gas produced during incineration to obtain sludge having a moisture content not higher than 20%; further crushing the sludge and mixing the crushed sludge with hot flue ash produced during incineration, and feeding the mixture into an incinerator to undergo self-sustaining incineration at 850°C to 950°C; and performing solid-gas separation on high-temperature flue gas produced after combustion, wherein the obtained hot flue gas is returned back for secondary drying and the obtained hot flue ash is mixed with the crushed sludge. The present application further provides a device for the treatment process. According to the treatment process of the present application, self-sustaining combustion can be safely and stably completed after drying pretreatment is performed on domestic sludge having a high moisture content; no auxiliary fuel needs to be added during incineration, and heat energy of the system can be fully utilized; reduction treatment of domestic sludge can be achieved.

The invention relates to a time-sharing measurement device for carbon content in flue fly ash. The device mainly comprises a sampler, a detection part and a control module, the sampler is provided with a plurality of sampling pipes, each sampling pipe is provided with an adjusting valve, time-sharing sampling is achieved through PLC logic control, and full-time-period fine coverage is ensured. The separation component separates fly ash from gas and collects a fly ash sample, and the detection component integrates a spectral analysis unit and a data processing unit, performs spectral analysis on the fly ash sample and calculates the carbon content. According to the method, multiple objective functions such as the fly ash carbon content, the combustion efficiency and the system stability are optimized at the same time by selecting multi-dimensional equipment process parameters and fly ash measurement data and adopting an evolutionary optimization algorithm, global optimization is achieved, the dependency relationship among the process parameters is fully considered, falling into a local optimal solution is avoided, the optimization efficiency is improved, and the method is suitable for popularization and application. The method can systematically coordinate the contradictory relation among all targets, achieves the maximization of the operation efficiency of the system while detecting the fly ash, and enables the combustion system to operate stably.

The utility model relates to the technical field of carbon dioxide capture, in particular to a gas distributor and a carbon dioxide absorption tower. The gas distributor comprises an inner cylinder, a perforated plate and a guide plate group, a gas flow channel is formed between the outer peripheral surface of the inner cylinder and the inner peripheral surface of a tower body, and a gas inlet communicated with the gas flow channel is formed in the tower body; a plurality of through holes are formed in the perforated plate, and the perforated plate is connected to the top end of the inner cylinder; the two guide plate groups are symmetrically arranged on the two sides of the inner cylinder by taking the longitudinal axis section of the gas inlet as a symmetric plane; and each flow guide plate group comprises a plurality of flow guide plates which are distributed at intervals along the outer circumferential direction of the inner cylinder body. Smoke entering the gas flow channel can be divided into a plurality of gas flows through the two flow guide plate sets, the smoke is rapidly dispersed, meanwhile, gas and liquid can be separated in the downward flowing process of the gas flows, and therefore liquid drop entrainment is reduced; and a plurality of air flows are reflected upwards by the tower bottom, penetrate through the perforated plate and are further homogenized, so that uniformly distributed air flows are formed.

Example gas recovery systems disclosed herein include a source gas conditioning assembly comprising a compression component and swing adsorption component configured to provide a conditioned source gas, a first membrane assembly to separate the conditioned source gas into a hydrocarbon enriched stream and a recovery stream, a second membrane assembly to separate the hydrocarbon enriched stream into a hydrocarbon product stream and a recycle stream, a carbon dioxide plant assembly to provide a carbon dioxide product stream and an enriched recycle stream, and a standalone membrane assembly at least selectively fluidly coupled to the enriched recycle stream, and separates the enriched recycle stream into a hydrocarbon enriched recycle stream and an effluent stream. The swing adsorption component is at least selectively coupled to the enriched recycle stream. The source gas conditioning assembly is fluidly coupled to the recycle stream, and at least selectively coupled to the hydrocarbon enriched recycle stream.

Currently the gas separation techniques available in the industry have many drawbacks such as particle attrition, low adsorption rate, gas leakage and the like. The disclosed portable modular rotary true moving bed for gas separation helps in overcoming these drawbacks. The disclosed gas reactor includes an inner tube, an outer tube, and an outer jacket. The inner tube which is fixed to an internal frame includes a set of box modules filled with adsorbent material. The internal frame helps the inner tube to rotate in a single direction. The outer tube and the outer jacket which is fixed to an external frame include ports which helps in letting in and out gaseous mixture and circulating heating medium and cooling medium. The design of the portable modular rotary true moving bed helps in using it in small-scale gas separation such as in automobiles, trucks, and ships.

The invention discloses a multi-amino absorbent for carbon dioxide capture and a method for capturing carbon dioxide from a gas mixture, and belongs to the technical field of gas separation and carbon capture, utilization and storage. The multi-amino absorbent at least comprises a first component and a second component, wherein the first component is at least one N-hydroxyalkyl-N '-hydroxyalkyl-alkane diamine; the second component is at least one organic amine different from the first component, and the organic amine contains amino groups which are not primary amino groups and does not contain steric hindrance amino groups; and a solvent and optionally an additive. The method for capturing carbon dioxide from a gas mixture includes contacting the polyamino absorbent with a gas mixture containing carbon dioxide, thereby capturing carbon dioxide. The polyamino absorbent disclosed by the invention has the advantages of low carbon dioxide absorption reaction heat in normal-pressure flue gas, high circulating absorption amount, high absorption rate, high desorption rate, low volatility and the like.

The invention relates to the technical field of gas separation membranes, in particular to a gas separation membrane based on a metal organic cage and a preparation method and application of the gas separation membrane based on the metal organic cage, a solution containing metal salt, an organic ligand and an organic solvent is prepared and reacts for 2-160 h at the temperature range of 50-200 DEG C, and a metal organic cage material is obtained; preparing a water-phase dispersion liquid containing a metal organic cage and an organic-phase reaction liquid containing polyacyl chloride or polyaldehyde; placing the organic phase reaction liquid on the surface of a support membrane to obtain a support membrane adsorbing an organic phase monomer; placing the water-phase dispersion liquid on the surface of a support membrane adsorbing an organic-phase monomer to obtain a nascent state separation membrane; the operation is repeated, the organic phase reaction liquid and the water phase dispersion liquid are poured on the surface of the nascent state separation membrane for multiple times, and the gas separation membrane based on the metal organic cage is obtained. The metal organic cage gas separation membrane prepared by the invention has high CO2 permeation rate, relatively high CO2 / N2 and CO2 / H2 separation factors and good long-term operation stability.

A polymer composition for carbon dioxide gas separation, the polymer composition comprising a polymer and a plurality of supramolecular structures, wherein the supramolecular structures are configured to selectively and reversibly adsorb carbon dioxide.

The invention provides a polyimide multilayer composite membrane material as well as a preparation method and application thereof, and belongs to the technical field of gas separation. According to the method, through collaborative design of a functional support layer, a gradient MOF layer and an ultrathin selection layer structure, the problems of support layer pore seepage, MOF agglomeration, weak interface bonding and the like in an existing composite membrane material are solved. The preparation method comprises the following steps: firstly, carrying out electrostatic spinning on a polyamide acid glue solution, and synchronously introducing dopamine by adopting a chemical imidization method to prepare a functionalized polyimide fiber membrane containing hydroxyl and amino on the surface, so that the mechanical property of a supporting layer and the MOF anchoring capability are remarkably improved; growing MOF layers with different particle sizes on the surface of the fiber membrane by regulating and controlling the concentration gradient of ligand / metal salt and the reaction time, and passivating through a silane coupling agent after each step of growth so as to avoid heterogeneous nucleation and construct a gradient structure; after the MOF gradient layer is subjected to Ar plasma pretreatment to introduce hydroxyl, the ultrathin polyamide selection layer is formed by utilizing interfacial polymerization of fluorine-containing acyl chloride and a macrocyclic amine monomer, and the ultrathin polyamide selection layer is suitable for gas separation work.

The utility model relates to the technical field of semiconductor tail gas treatment, in particular to a plasma tail gas treatment device which comprises a reaction assembly, a cooling pipe, a washing assembly, a water-gas separation assembly and a gas outlet pipe, the washing assembly comprises a water tank and a washing pipe, and the cooling pipe and the washing pipe are both fixedly installed above the water tank; the reaction assembly comprises a reaction cavity, an air inlet pipe and a plasma torch; an annular air plate for inputting combustion air is connected between the reaction cavity and the cooling pipe; spraying pipes for washing gas are arranged in the water tank and the washing pipe; the water-gas separation assembly comprises a water-gas separation pipe and a water-gas separation mechanism. According to the utility model, the plasma moment and the washing assembly are used for carrying out full treatment and spray hydrolysis on process gas, so that water-soluble substances are discharged as wastewater, and the treated gas reaching the standard is discharged to a common affair central system, so that full treatment of waste gas is completed; and the air supplementing mechanism is arranged for secondary air supplementing, and meanwhile, when the plasma moment loses efficacy, the air flow can be increased to dilute the waste gas.

The invention relates to the technical field of gas separation and purification, in particular to a method and system for recycling hydrogen in mixed gas through pressure swing adsorption. The method comprises the following steps: performing multi-layer adsorption impurity removal on mixed gas containing 20-25% of silane, 10-15% of disilane and 60-70% of hydrogen, and cooling to 22-28 DEG C; the mixed gas subjected to primary impurity removal enters a pressure swing adsorption device, and an adsorbent in the adsorption device is modified activated carbon. The system comprises a mixed gas cylinder, a pretreatment unit, a pressure swing adsorption unit and a hydrogen collection unit which are connected in sequence. By adopting the pressure swing adsorption method, the hydrogen recovery rate is remarkably increased and can reach 93%, the purity can reach 99.2% or above, and the strict requirement of high-end industrial production for high-purity hydrogen can be met.

The invention relates to the technical field of gas separation membranes, in particular to a gas separation membrane based on a covalent organic framework and a preparation method and application thereof, and the preparation method comprises the following steps: preparing a mixed solution containing a polyamine monomer, a polyaldehyde monomer and an organic solvent, and reacting to obtain a COF material; the preparation method comprises the following steps: preparing an amine micromolecule aqueous solution, adding a COF material, and mixing until adsorption equilibrium to obtain NH2-COF; preparing a water-phase reaction solution containing NH2-COF and an organic-phase reaction solution containing multi-acyl chloride; the water-phase reaction liquid is in contact with the surface of the support membrane, and is in contact with the organic-phase reaction liquid after excess liquid is removed, and a nascent state COF membrane is obtained through reaction; and carrying out heat treatment on the nascent state COF membrane at 30-90 DEG C for 1-30 minutes to obtain the COF gas separation membrane. The gas separation membrane prepared by the invention can realize efficient separation of carbon dioxide / nitrogen and carbon dioxide / methane, and solves the problem of low selectivity of a COF membrane in separation of carbon dioxide / nitrogen and carbon dioxide / methane in the prior art.

The novel separator comprises a vertical tank body and a cooling pipe assembly, the cooling pipe assembly is arranged on the upper portion of the interior of the vertical tank body, a silk screen drop catching assembly is arranged above the cooling pipe assembly, and the silk screen drop catching assembly comprises an upper cover, a supporting sleeve, multiple layers of silk screens and a fixed partition plate. The supporting sleeve is sleeved on the multilayer silk screen, the upper cover is arranged at the top of the multilayer silk screen, a gap is arranged between the upper cover and the supporting sleeve, the supporting sleeve is fixed on the inner wall of the vertical tank body through a fixed partition plate, an exhaust port is arranged at the upper end of the vertical tank body, a pipeline of the exhaust port extends into the vertical tank body, and a steam filter is arranged at the lower end of the pipeline of the exhaust port. The mixed volume is primarily separated through gravity settling, liquid descends and is stored at the bottom of the tank body, gas ascends and sequentially flows through the cooling pipe assembly to be cooled and the silk screen drop catching assembly to be dewatered, finally, the gas is discharged after passing through the gas filter, and finally, gas separation, cooling and dewatering of high-temperature gas-liquid components are achieved.

The invention relates to an air pre-impurity-removal control method and system for enrichment and separation of Kr, and relates to the technical field of gas separation and purification, and the air pre-impurity-removal control method comprises the following steps: removing impurity components in air through an impurity removal device to obtain air subjected to impurity removal treatment; carrying out multi-stage enrichment and separation treatment on the air subjected to impurity removal treatment to obtain enriched Kr gas; and introducing the enriched Kr gas into a chromatographic separation device, and separating krypton from other inert gases to obtain a target krypton component. The problems that in the traditional Kr enrichment and separation process, due to the fact that air impurities are prone to icing, the device is blocked, the multi-stage separation parameter adaptability is poor, and the enrichment efficiency is low are solved, and through pre-impurity removal of intelligent parameter configuration and multi-stage enrichment of gradient temperature control, the Kr separation stability, the enrichment efficiency and the target component purity are improved.

The invention belongs to the technical field of gas separation engineering, and particularly discloses a deep removal method and device for dissolved oxygen in a pregnant solution, and the device comprises an absorption unit and a removal unit. A barren liquor inlet is formed in the upper part of the absorption unit, barren liquor enters from the upper part of the absorption unit, a feed gas inlet is formed in the lower part of the absorption unit, feed gas enters from the lower part of the absorption unit, the barren liquor and the feed gas are in countercurrent full contact in the absorption tower, and oxygen-containing rich liquor is obtained at the bottom of the absorption tower. The rich liquid enters the removal unit from the absorption unit, the rich liquid inlet is located in the upper portion of the removal unit, the lower portion of the removal unit is provided with a replacement gas inlet, replacement gas enters the removal unit from the lower portion of the removal unit, and after the replacement gas is in countercurrent full contact with the oxygen-containing rich liquid, removal gas containing slightly-dissolved gas such as oxygen is formed at the top of the removal unit. The removed gas is discharged or enters a recycling system according to field requirements, and deoxidized rich liquid is sent out from the bottom of the removal unit. A purified gas outlet is formed in the top of the absorption unit, and purified gas is sent out from the outlet.

The invention discloses a PSA oxygen production and nitrogen recovery cooperative control method and system, and relates to the technical field of gas separation. The method comprises the following steps: establishing a dynamic multi-target evaluation function comprising a plurality of performance indexes such as air compressor energy consumption, vacuum pump energy consumption, oxygen purity and nitrogen recovery rate, and collecting pressure, temperature, gas components and flow data in an adsorption tower in real time; in the adsorption stage, based on the real-time data and the current oxygen demand, a first machine learning model is used for generating and executing a dynamic pressure adjusting strategy for the air compressor; in a desorption stage, predicting an optimal vacuum degree curve based on historical desorption data by utilizing a second machine learning model, generating a start-stop and pumping rate control strategy of the vacuum pump according to the optimal vacuum degree curve, and determining the recovery rate of the vacuum pump according to a comparison result of the real-time nitrogen concentration and a preset recovery concentration threshold value. And desorption airflow is controlled to enter the nitrogen recovery pipeline or be directly discharged through the valve.

The invention discloses an automobile precision part airtightness detection method. The method comprises the steps that a to-be-detected part is clamped in an airtightness detection tool in a sealed mode to form a detection cavity; the detection cavity is pre-filled with detection gas until the initial detection pressure is reached and the pressure is stabilized, so that pressure drift caused by sealing springback, clamping elastic deformation and gas separation is weakened; applying pressure disturbance with a preset amplitude under the same clamping state, collecting pressure change data, and calculating to obtain an equivalent volume parameter of the detection system; collecting pressure change data within a preset detection time, and performing adaptive compensation on the airtightness detection result based on the equivalent volume parameter to obtain a compensation result; and completing qualification judgment according to a compensation result, and analyzing detection abnormity in combination with an equivalent volume parameter so as to distinguish tool leakage and part body leakage. According to the invention, the stability and consistency of airtightness detection of the aluminum casting can be improved, the misjudgment rate is reduced, and the batch detection requirement of an automatic production line is met.

The utility model relates to a liquid-gas separation structure of a liquid-cooled motor, which comprises a motor end cover, the motor end cover is provided with a central hole, one or more circles of liquid-gas separation channels are arranged around the central hole, and the liquid-gas separation channels are provided with air exchange ports. The liquid-gas separation channel comprises a liquid-gas separation ring groove and a liquid blocking cover plate, and the liquid blocking cover plate covers the liquid-gas separation ring groove to form the liquid-gas separation channel; and the air exchange port is formed in the liquid-gas separation ring groove. Through the arrangement of the liquid-gas separation ring grooves and the multiple circles of liquid-gas separation ring grooves, the effect of fully separating a liquid-gas mixture is achieved, and the problem that in the prior art, cooling liquid damages the breathability of the ventilation valve is solved.

The present disclosure provides a non-condensable gas reduction system that reduces the effects of atmospheric components contained in gas that is reduced in the reduction well. [Solution] A non-condensable gas reduction system in a geothermal power plant returns non-condensable gas that remains uncondensed when cooled from a first gas contained in geothermal fluid that springs from a production well to a reinjection well. The non-condensable gas reduction system comprises: a pump that pressurizes the first liquid sent to the reinjection well; an ejector that is driven by the first liquid, attracts the non-condensable gas, and discharges a second liquid that is a mixture of the first liquid and the non-condensable gas; and a gas separator connected downstream of the ejector that separates the second gas containing atmospheric components that has been mixed into the second liquid, and discharges the second gas into the atmosphere while discharging the second liquid into the reinjection well.

The utility model relates to the field of waste gas purifiers, in particular to a waste gas purification device for hydrogen-oil-gas separation, which comprises a rectangular bottom plate, an oil-gas separation box is arranged on the bottom plate, a hydrogen purification tank is fixedly connected onto the bottom plate, and a filter box is fixedly connected onto the bottom plate. When the oil-gas separation device is used, oil can be separated through the oil-gas separation box, heavy oil flows out from the lower part of the oil-gas separation box through the oil outlet pipe, the first electromagnetic valve controls the oil to flow in the oil outlet pipe, and light waste gas enters the hydrogen purification tank from the first gas outlet pipe after being preliminarily filtered by the first filter screen; the palladium alloy separation pipe in the hydrogen purification tank is used for separating hydrogen in the waste gas, and the filter box is used for further filtering the waste gas after hydrogen purification, so that the filter effect is better, air pollution is avoided, and the hydrogen in the waste gas can be recycled.

A system for separating a gas mixture is provided. The system includes a source of a gas mixture and a membrane separation stage including a gas separation membrane module. The membrane separation stage is in fluid communication with the source of the gas mixture, and the gas separation membrane module is configured to separate the gas mixture into a retentate stream and a permeate stream. The gas separation membrane module also includes a membrane having a permeate side and a retentate side. A sweep stream is provided to the permeate side of the membrane, the sweep stream comprising a portion of the retentate stream.

The utility model relates to an oil-gas separator and an oil-gas separation device, and the oil-gas separator comprises an upper cover plate, a lower cover plate and a filter chip arranged between the upper cover plate and the lower cover plate. The oil-gas separation device comprises an end cover with a center hole, and an oil-gas separator is arranged on the outer wall of the center hole. According to the oil-gas separator and the oil-gas separation device, gaseous cooling liquid generated by high temperature in operation of the motor can be fully separated from an air mixture, the oil-gas separator is convenient to replace so as to prolong the service life of the motor, and the problem that in the prior art, the cooling liquid damages the air permeability of a ventilation valve is solved.

The invention discloses a high-solid-content MIL-101 (Fe) / PIM-1 mixed matrix membrane and a preparation method thereof, and belongs to the technical field of gas separation membranes. The preparation method comprises the following steps: firstly, dissolving an iron source in a PIM-1 polymer solution to form a homogeneous membrane casting solution; forming the obtained membrane casting solution, and removing the solvent to obtain a PIM-1 / Fe (II) composite substrate containing Fe (III); then, the substrate is alternately immersed in a terephthalic acid methanol solution and a ferric salt methanol solution, and MIL-101 (Fe) is generated in the polymer matrix through in-situ limited crystallization by layer-by-layer limited crystallization. According to the method, the problem of interfacial compatibility between the MOF filler and the polymer matrix is effectively solved, and high loading capacity (up to 52.9 wt.%) of MIL-101 (Fe) is realized without agglomeration. Meanwhile, the membrane has excellent COplasticizing resistance and long-term operation stability, and has a wide application prospect in the fields of carbon capture and the like.

The invention discloses a low-concentration carbon dioxide trapping system and method, and belongs to the technical field of gas separation and trapping. The system comprises an air filter, a zeolite adsorption rotating wheel, a desorption heater, a desorption fan, a centrifugal fan, a pressure swing adsorption module (at least comprising double towers), a vacuum pump, a CO2 storage tank, a rear-end purification and utilization system and a control system. According to the method, trapping is realized through pretreatment, first-stage adsorption concentration, desorption transfer, second-stage purification, collection and storage and circulating operation. The zeolite adsorption rotating wheel is used for adsorbing and concentrating low-concentration CO2, and then the low-concentration CO2 is purified through the pressure swing adsorption module, so that the problems of low low-concentration trapping efficiency and high energy consumption in the prior art are solved. The device has the advantages of high trapping efficiency, low energy consumption, continuous operation, wide application scene and the like, is suitable for trapping low-concentration CO2 in atmosphere and industrial tail gas, and provides an efficient technical scheme for carbon emission reduction.