80 results about "Membrane contactor" patented technology

The invention discloses an ammonia-nitrogen wastewater treatment device and method capable of generating target ammonium salt, the ammonia-nitrogen wastewater treatment device comprises a bipolar membrane electrodialysis device and a membrane contactor, the bipolar membrane electrodialysis device comprises at least one treatment unit and an anode chamber and a cathode chamber which are separated by the treatment unit; the treatment unit comprises a front bipolar membrane, a front cation exchange membrane, a middle bipolar membrane, an anion exchange membrane, a rear cation exchange membrane and a rear bipolar membrane which are sequentially arranged in the direction from the anode chamber to the cathode chamber, and a feeding chamber, an ammonia production chamber, an acid production chamber, a desalting chamber and an alkali production chamber are respectively formed in spaces generated between the corresponding membranes; the membrane contactor comprises a breathable hydrophobic membrane dividing an inner cavity of the membrane contactor into a first chamber and a second chamber, and the first chamber and the second chamber communicate with the ammonia production chamber and the acid production chamber through pipelines correspondingly. And the method has relatively high application and popularization values.

The present invention provides a ship exhaust gas desulfurization device and a desulfurization method, which include a sulfur-containing ship exhaust gas pretreatment system, a seawater pretreatment system, a membrane contactor, and a seawater post-treatment system; the outlet end of the sulfur-containing ship exhaust gas pretreatment system is connected to the shell-side inlet end of the membrane contactor for sending the dust- and oil-removed exhaust gas into the shell side of the membrane contactor; the outlet end of the seawater pretreatment system is connected to the tube-side inlet end of the membrane contactor for sending the pretreated seawater into the tube side of the membrane contactor; the membrane contactor is a membrane contactor filled with polytetrafluoroethylene hollow fiber hydrophobic microporous membranes; the inlet end of the seawater post-treatment system is connected to the tube-side outlet end of the membrane contactor for post-treating the seawater after absorbing sulfur dioxide and oxidizing sulfite into sulfate. The ship exhaust gas desulfurization device described in the present invention has a high integration degree, a compact volume, and a high desulfurization efficiency, can achieve efficient desulfurization of ship exhaust gas, and has good application prospects.

The invention discloses a membrane contactor-membrane distillation device and method for shale gas produced water treatment, and relates to the technical field of water treatment and resource recovery, the membrane contactor-membrane distillation device comprises a membrane contactor system and a membrane distillation system, and the membrane distillation system and the membrane contactor system are connected through a first water outlet tank; the membrane contactor system comprises a water inlet tank, a membrane contactor membrane assembly and a water outlet tank I, the water outlet tank I is connected with the membrane contactor membrane assembly through a water outlet pipeline, and the membrane contactor membrane assembly is connected with the water inlet tank through a water inlet pipeline; the membrane distillation system comprises a membrane distillation membrane assembly and a second water outlet tank. According to the membrane contactor-membrane distillation device and method for treating the shale gas produced water, the membrane contactor system realizes selective and efficient recovery of ammonia by adjusting the pH value of wastewater and circularly absorbing by using a phosphoric acid solution; the membrane distillation system is used for carrying out advanced treatment on the effluent of the membrane contactor after fully absorbing ammonia, and high-quality fresh water is produced under the driving of the temperature difference between heating and condensation.

A liquid sorbent system includes a membrane contactor and a bubbler. The membrane contactor is configured to absorb one or more contaminants into or desorb one or more contaminants from a liquid sorbent. The membrane contactor includes a contactor housing and one or more hollow fiber membranes positioned in the contactor housing. The contactor housing is configured to receive the liquid sorbent at a liquid inlet and discharge liquid sorbent at a liquid outlet. The bubbler is configured to generate bubbles in the liquid sorbent upstream of the liquid outlet.

An air conditioner includes an air flow path configured to direct an air flow in a direction. The air conditioner also includes an evaporative cooling membrane panel disposed within the air flow path and including a face disposed at an oblique angle relative to the direction. The face is defined by microporous fibers of the evaporative cooling membrane panel. Each microporous fiber is configured to receive liquid in a fluid flow path of the microporous fiber such that the air flow over the microporous fiber generates a vapor. Each microporous fiber is also configured to release the vapor into the air flow via pores of the microporous fiber.

The invention discloses a ceramic catalytic membrane as well as a preparation method and application thereof in regeneration of a CO2-rich alcohol amine solution, the ceramic catalytic membrane comprises a ceramic membrane, and sulfated zirconium oxide is loaded on the surface of the ceramic membrane, in membrane pore channels and in a supporting layer. The preparation method of the ceramic catalytic membrane comprises the following steps: soaking a ceramic membrane in a zirconium sulfate solution, washing, drying and roasting. A membrane contactor constructed by using the prepared ceramic catalytic membrane can remarkably improve the regeneration performance of a CO2-rich alcohol amine solution, effective combination of the structure and the performance is realized, the preparation method is simple and convenient, the condition is mild, and the ceramic catalytic membrane with relatively high catalytic activity can be prepared at relatively low concentration.

This invention belongs to the field of hollow fiber membrane preparation technology, and discloses a braided tube-reinforced polyvinylidene fluoride hollow fiber hydrophobic membrane, its preparation method, and its application. The polyvinylidene fluoride hollow fiber hydrophobic membrane includes a braided tube and a hydrophobic membrane layer formed on the surface of the braided tube. The outer diameter of the braided tube-reinforced polyvinylidene fluoride hollow fiber hydrophobic membrane is 0.3-3 mm, the tensile breaking strength is greater than 100 N, and the pure water permeability is 200-7500 L / (m²). 2 •h)@0.1MPa 20℃. The preparation method includes: preparing a casting solution by combining polyvinylidene fluoride resin, organic solvent, composite pore-forming agent, and optionally polytetrafluoroethylene microparticles; extruding the casting solution onto the outer surface of a braided tube using a hollow fiber membrane spinning machine, and forming a membrane through phase separation in a coagulation bath. This invention significantly improves the mechanical strength of the membrane through braided tube reinforcement and achieves high flux and high hydrophobicity using a water-inorganic-organic composite pore-forming agent, making it suitable for high-performance separation processes such as membrane distillation, membrane contactors, and gas separation.

The invention discloses a decarburized amine solution electrodialysis desalination purification regeneration method. The decarburized amine solution electrodialysis desalination purification regeneration method comprises the following steps: pretreating a decarburized amine solution to obtain a pretreated solution; and performing electrodialysis purification treatment on the pretreatment solution. According to the decarburized amine solution electrodialysis desalination purification regeneration method, the ideas of electrodialysis and a membrane contactor assembly are combined, and decoloring purification of the decarburized amine solution and efficient recovery of amine are achieved.

The invention discloses a method for enhancing mass transfer of a membrane contactor based on a falling liquid film flow and a method for calculating the thickness of the falling liquid film. The method for enhancing mass transfer of a membrane contactor is to make the alcohol amine solution with CO2 load on the liquid phase side of the hydrophilic porous membrane in the membrane contactor be transmitted in the direction against gravity, and part of the alcohol amine solution continuously seeps out from the membrane pores of the hydrophilic porous membrane, and the falling liquid film formed by the seeped alcohol amine solution on the surface of the hydrophilic porous membrane permeation side, which is dispersed downward and continuously flows along the membrane surface, and the membrane pores that are continuously wetted, are used to reduce the mass transfer resistance, promote the separation of gas-liquid two phases on the permeation side, and timely strip CO2 from the liquid. The membrane contactor is always in a stable operating state during the entire desorption process, and a more efficient and stable CO2 desorption mass transfer is achieved.

The utility model belongs to the technical field of isooctyl nitrate production equipment, and discloses an isooctyl nitrate crude product alkali washing device which comprises a fiber membrane contactor and a separation tank which are communicated, the top of the fiber membrane contactor is provided with a first liquid inlet pipe used for leading in an isooctyl nitrate crude product and a second liquid inlet pipe used for leading in alkali liquor, and the first liquid inlet pipe and the second liquid inlet pipe are communicated with each other. The first liquid inlet pipe penetrates along the top of the fiber membrane contactor, a buffer mechanism is arranged below the first liquid inlet pipe, the buffer mechanism comprises a splitter plate and a buffer cavity with an opening in the top, a pipe opening of the first liquid inlet pipe is located in the buffer cavity, the buffer cavity is formed in the center of the top of the splitter plate, and through holes are evenly distributed in the splitter plate. According to the utility model, the buffer cavity is matched with the splitter plate to buffer the crude isooctyl nitrate introduced into the fibrous membrane contactor, so that the generation of foam is reduced, and the crude isooctyl nitrate is ensured to be fully deacidified.

The invention discloses a production process of an ambroxol oral solution, and belongs to the technical field of chemical medicinal preparations, the production process comprises the following steps: adding an aqueous solution containing ambroxol hydrochloride, clenbuterol hydrochloride, sorbitol, propylene glycol, glycerol, hydroxyethyl cellulose, DL-tartaric acid and sodium benzoate into a reaction kettle, and uniformly stirring to obtain the ambroxol hydrochloride oral solution, the clenbuterol hydrochloride, the sorbitol, the propylene glycol, the glycerol, the hydroxyethyl cellulose, the DL-tartaric acid and the sodium benzoate; the preparation method comprises the following steps: preparing in a production system passivated by hydroxyethyl diamine tetraacetic acid trisodium salt, treating by a two-stage series hollow membrane contactor, and finally filling a glass bottle with a liquid medicine. According to the preparation method disclosed by the invention, on the basis of prescription adjustment without adding antioxidants such as sodium pyrosulfite and the like, the impurities of the medicine in the production and storage processes are obviously reduced, the product stability and the clinical medication safety are improved, and the preparation process is simple and stable to operate and suitable for industrial production.

The utility model discloses a device for removing carbonate radicals from wastewater, which has the advantages that the operation energy consumption is reduced, the carbon dioxide in the treated water is reduced to 0.5 mg / L, and the effect is better. The acid adding reaction storage tank comprises a tank body, a stirrer, an acid flow inlet, a waste water inlet and a waste water flow outlet, and a stirring shaft of the stirrer is arranged in an inner cavity of the tank body for stirring operation; an inlet of the wastewater circulation pipeline is integrated with a lifting pump, and the wastewater circulation pipeline is provided with a water inlet flow meter and a plurality of security filters in the wastewater circulation direction; and each group of decarbonization membrane contactors comprises a contactor body, a wastewater inlet, a wastewater outlet, a purge gas inlet and a purge gas outlet.

The invention discloses a control method of a membrane contactor combining ultrasonic monitoring and ultrasonic cleaning for membrane pollution, and the control method comprises the following steps: combining ultrasonic monitoring and cleaning, transmitting ultrasonic waves to a membrane surface through a high-frequency probe for monitoring, collecting an ultrasonic reflection spectrogram in real time, and calculating the thickness of a membrane pollution layer according to the difference of signal arrival time. When the pollution degree affects the normal operation of the membrane contactor, the high-frequency ultrasonic probe is replaced, and the low-frequency probe is used for cleaning the membrane pollution by utilizing the ultrasonic cavitation effect. And the cleaning effect can be verified again through ultrasonic monitoring until the membrane pollution is thoroughly cleaned, and the membrane contactor is ensured to recover the optimal state. Different low frequencies are selected for pollutants of different degrees so as to achieve the optimal cleaning effect. According to the method, only the probe needs to be replaced, the monitoring and cleaning processes are continuously carried out, the work of the membrane contactor does not need to be interrupted, the operation efficiency and the equipment utilization rate are improved, meanwhile, membrane damage and operation complexity are reduced, and the monitoring and cleaning processes are coherent and concise.

A fluorine-containing wastewater treatment system includes a separation membrane contactor including a hydrophobic separation membrane having a plurality of pores, the separation membrane contactor performing a separation process by the hydrophobic separation membrane, a first supply assembly configured to supply treatment target water containing fluorine to the separation membrane contactor, a second supply assembly configured to supply an absorbent to the separation membrane contactor. The absorbent is physically separated from the treatment target water by the hydrophobic separation membrane, and the fluorine of the treatment target water is absorbed by the absorbent through the plurality of pores of the hydrophobic separation membrane, using the separation process.

The invention relates to the technical field of gas separation membrane materials in a carbon capture technology, in particular to a tubular ceramic membrane surface super-hydrophobic modification method for a carbon dioxide capture membrane contactor, a hydrophobic modified membrane and a tubular ceramic membrane. The tubular ceramic membrane surface hydrophobic modification method comprises the following steps: step B, forming a SiO2 coarsening layer on the surface of a tubular ceramic membrane substrate; step C, forming a polydopamine intermediate bridging layer on the surface of the SiO2 coarsening layer; and step D, forming a polydimethylsiloxane hydrophobic layer on the polydopamine intermediate bridging layer. According to the super-hydrophobic coating disclosed by the invention, the bonding strength and durability of the super-hydrophobic coating are remarkably enhanced by the polydopamine middle layer, and the problem of weak bonding force between a functional layer and a matrix in a traditional super-hydrophobic coating is effectively solved.

The present invention relates to a carbon dioxide capture system capable of capturing high-concentration carbon dioxide from exhaust gases of carbon emission sources by means of a simple structure. The carbon dioxide capture system according to the present invention comprises: a room-temperature separation membrane for primarily capturing carbon dioxide in exhaust gases transferred from carbon emission sources generating the exhaust gases containing carbon dioxide; a membrane contactor for capturing carbon dioxide by means of a mechanism different from the room-temperature separation membrane and secondarily capturing carbon dioxide in the residual exhaust gases from which carbon dioxide has been primarily separated and removed by the room-temperature separation membrane; and a mixer for generating high-concentration carbon dioxide by mixing the carbon dioxide separated by the room-temperature separation membrane and the carbon dioxide separated by the membrane contactor.

The present invention concerns a method of cultivation of microorganisms in a bioreactor wherein the culture medium comprises carbon dioxide (CO2) as carbon source. The CO2 supply in the bioreactor is regulated using a membrane contactor.

The utility model discloses a PTFE double-membrane coupling hardness and ammonia removal system applied to gasification ash water treatment, and belongs to the field of membrane method water treatment. Comprising a high-density pool, a buffer tank, a Y-shaped filter, an ultrafiltration water inlet pump, a coarse filter, a PTFE ultrafiltration membrane, an intermediate tank, an intermediate water pump, a heat exchanger and a PTFE deamination membrane contactor which are connected in sequence, ammonia sulfate recovered by the device can be used as a byproduct, and the problems of high ammonia nitrogen content and high hardness in coal gasification grey water are solved. The treatment system provided by the utility model is convenient to operate, relatively low in cost, stable in system, good in hardness and ammonia removal effect, good in effluent quality and low in energy consumption, by-products are recycled, and the effluent can meet a back-end membrane recycling process.

The invention discloses a method for purifying pyromellitic dianhydride, comprising: mixing a mixed gas containing pyromellitic dianhydride and an inert gas, and then passing the mixed gas through a membrane contactor into an aqueous solution for hydrolysis reaction, followed by solid-liquid separation to obtain a pre-crystallization liquid; subjecting the pre-crystallization liquid to ultrasonic treatment, cooling crystallization, and solid-liquid separation to obtain pyromellitic acid crystals; and dehydrating the pyromellitic acid crystals to obtain once-purified pyromellitic dianhydride. The method improves the mass and heat transfer efficiency and the hydrolysis rate of pyromellitic dianhydride by passing the mixed gas through a membrane contactor for bubbling. In addition, by controlling the turbidity of the pre-crystallization liquid after ultrasonic treatment, the crystallization efficiency and crystal purity of pyromellitic acid are improved, and a small and uniform crystal product is obtained, thereby preventing the crystals from adhering to the kettle wall and being difficult to collect, and also preventing the entrainment of impurities, and further improving the dehydration efficiency. The obtained pyromellitic dianhydride has a high purity and yield.

The invention discloses an ozone catalytic membrane and aeration biological membrane synergistic reaction device which comprises an ozone preparation unit, the ozone preparation unit comprises an oxygen generator and an ozone generator connected with the oxygen generator, and the ozone preparation unit comprises an ozone catalytic membrane reactor and an aeration biological membrane reactor. The reaction process is as follows: a target water body and ozone enter the ozone catalytic membrane reactor, and then enter the aeration bio-membrane reactor for reaction after reaction. According to the invention, bubble-free aeration is carried out by using the ozone catalytic membrane contactor, so that the operation cost required for preparing an ozone source can be utilized to the maximum extent.

The invention relates to a method for recovering water and dyes, simultaneously, from wastewater, which comprises: - pretreating the wastewater using an ultrafiltration process; and - a step of concentrating the colourants present in the permeate stream obtained in the previous step, using a membrane contactor, which is selected from: - a step of membrane distillation of the permeate stream obtained in the previous step, using a membrane contactor, and - a step of osmotic membrane distillation of the permeate stream obtained in the previous step, using membrane contactors. The invention provides an innovative solution to address the treatment of textile industry effluents, promoting water reuse and colourant recovery in an efficient and sustainable manner.

The invention discloses a method and a device for purifying and recycling a propylene glycol methyl ether acetate (PGMEA) solvent. The process sequentially comprises the steps of pre-filtering, metal trapping and membrane contactor pervaporation dehydration, polishing and filtering, and then forming an observation batch in a small tank; the indexes of water, particles, total organic carbon and proxy metal are monitored on line, and release / backflow is performed based on dual-threshold gating and exponential weighted moving average; when flux or quality is abnormal, cleaning in place (CIP) is performed and a reset is verified to above 80% of the baseline. The device consists of a raw material tank, a prefilter, a metal trapping unit, a membrane contactor, a polishing filter, a small tank, a valve group and a finished product tank, and is matched with a vacuum / scavenging and condensing unit. According to the scheme, the water content is smaller than or equal to 200 ppm under fluctuating feeding, and the water content and particles / TOC reach the standard cooperatively.

The invention relates to a process for removing solubilised metals from a solution by carbonate precipitation of the metal. Carbonate is formed in situ by dissolving carbon dioxide in the solution using an enhanced gas-dissolution unit such as a membrane contactor, and raising the pH of the solution. Metals to be removed include scaling metals, e.g. calcium, strontium, barium or combinations thereof.

The application discloses a membrane contactor differential pressure automatic protection device and a use method and application. The differential pressure automatic protection device comprises a shell with a cavity, and a piston is arranged in the shell. The piston divides the cavity into a liquid-phase chamber and a gas-phase chamber. The liquid-phase chamber is provided with a liquid-phase limit and a liquid-phase interface. The liquid-phase limit is arranged in the liquid-phase chamber close to the liquid-phase interface. The gas-phase chamber is provided with a gas-phase limit and a gas-phase interface. The gas-phase limit is arranged in the gas-phase chamber close to the gas-phase interface. The device can automatically adjust the gas-liquid phase pressure difference in the operation process of the membrane contactor, balance the pressure difference, prevent the membrane from being wetted, has the advantages of simple and compact structure, good durability, high safety and the like, and can be widely used in the fields of membrane absorption natural gas decarburization and other membrane contactors.

The utility model discloses a device for removing volatile organic compounds in water, which can remove the volatile organic compounds in the water to below 1ppm and is lower in operation energy consumption. The device comprises a wastewater circulation pipeline; a nitrogen purging pipeline; an organic matter gathering pipeline; the treated wastewater flows out of the pipeline; and at least one group of volatile organic compound removal membrane contactors, each group of volatile organic compound removal membrane contactors comprising a contactor body, a wastewater inlet, a wastewater outlet, a purge gas inlet and a volatile organic compound outlet, waste water inlets and waste water outlets of all volatile organic compound removal membrane contactors are sequentially connected in series to form a total waste water inlet and a total waste water outlet corresponding to the waste water circulation pipeline; an inlet of the wastewater circulation pipeline is integrated with a lifting pump, and the wastewater circulation pipeline is provided with a water inlet flow meter and a plurality of security filters along the wastewater circulation direction.

Disclosed herein is a carbon dioxide capture system capable of capturing high-concentration carbon dioxide in flue gas emitted from a carbon emission source using a simple structure. The carbon dioxide capture system includes: a normal temperature membrane configured to perform primary capture of carbon dioxide in flue gas transferred from a carbon emission source generating carbon dioxide-containing flue gas; the membrane contactor is configured to perform secondary capture on carbon dioxide in residual flue gas after primary separation and carbon dioxide removal of the normal-temperature membrane, and the membrane contactor captures carbon dioxide through a mechanism different from that of the normal-temperature membrane; and a mixer configured to mix the carbon dioxide separated by the normal-temperature membrane with the carbon dioxide separated by the membrane contactor to generate high-concentration carbon dioxide.

The invention discloses an ammonia nitrogen wastewater treatment device capable of generating target ammonium salts and a method thereof. The device comprises a bipolar membrane electrodialysis device and a membrane contactor. The bipolar membrane electrodialysis device comprises at least one treatment unit and an anode chamber and a cathode chamber separated by the treatment unit. The treatment unit comprises a front bipolar membrane, a front cation exchange membrane, a middle bipolar membrane, an anion exchange membrane, a rear cation exchange membrane and a rear bipolar membrane arranged in sequence from the anode chamber to the cathode chamber. The spaces generated between the corresponding membranes respectively form a feed chamber, an ammonia production chamber, an acid production chamber, a desalination chamber and an alkali production chamber. The membrane contactor comprises an air-permeable and hydrophobic membrane which divides its inner cavity into a first chamber and a second chamber. The first chamber and the second chamber are respectively connected to the ammonia production chamber and the acid production chamber through pipelines. The device of the invention is flexible to implement and has low energy consumption. It can output different types of ammonium salts and alkalis in a direction, meets the needs of personalized customization, and has strong application and promotion value.

The application provides a supported ionic liquid membrane contactor for extracting lithium from salt lake brine, and belongs to the technical field of materials.The supported ionic liquid membrane contactor has an H-shaped cabin structure, the middle part of the cabin is provided with a crown ether polyamide / imine supported ionic liquid membrane which is constructed by using a crown ether polymer porous membrane as a supporting membrane material and combining an organic phosphorus-ionic liquid extraction system, the two ends of the cabin are respectively a feed phase for containing a magnesium-lithium solution and a receiving phase for containing an extractant, and based on the structure-activity relationship among the crown ether-lithium ion-magnesium ion-organic phosphorus-ionic liquid extraction system, the crown ether polyamide / imine supported ionic liquid membrane can realize efficient separation of magnesium ions and lithium ions in the salt lake brine with a high magnesium-lithium ratio while having excellent running stability.The method is simple in preparation, reduces the amount of extractant, can realize coupling and continuous operation of extraction and back extraction in the lithium extraction process, and is an environment-friendly and efficient separation method.

Hollow fiber membranes, membrane contactors, and related production and use methods. The asymmetric hollow fiber membranes include a porous substrate having a multiplicity of pores and including at least one semi-crystalline thermoplastic polyolefin (co)polymer. A skin layer including at least one polydiorganosiloxane polyoxamide copolymer overlays the porous substrate. The skin layer is less porous than the porous substrate and forms an outer surface of the asymmetric hollow fiber membrane, while the porous substrate forms an inner surface of the hollow fiber membrane. The skin layer is preferably nonporous.

The present invention provides a method for the recovery of 2,3-butanediol (BDO) from an aqueous fermentation broth. The method includes directing an aqueous phase along the lumen side or the shell side of a plurality of hydrophobic hollow fibers while simultaneously directing an organic phase along the other of the lumen side or the shell side of the plurality of hollow fibers. The aqueous phase includes a fermentation broth containing BDO, water, and impurities, and the organic phase is initially composed entirely of an organic solvent, the organic solvent being immiscible in water and having an affinity for BDO. The organic solvent continuously recovers BDO from the fermentation broth, the BDO being a precursor for aviation fuels and other applications.