48 results about "Membrane contactor" patented technology

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.

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 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 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 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 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 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.

1. The invention relates to a membrane (1) for a membrane contactor (2), which is designed as a hollow tube structure symmetrical to a central plane (ME) consisting of branched tubes (3, 3', 3", 3'''', 3'''') with several branching planes (VE) parallel to the central plane (ME) on both sides of the central plane (ME), wherein the walls of the tube structure are material-permeable and / or energy-permeable, and wherein in region (B) of each branching plane (VE) each tube (3, 3', 3'', 3''') extending towards the central plane (ME) branches into several tubes (3', 3'', 3''', 3'''') extending towards the central plane (ME), and the tubes (3'''') extending from both sides of the central plane (ME) from the respective last branching plane (VE) to the central plane (ME) in region (ÜB) of the central plane (ME) merge into one another. The invention further relates to a membrane contactor (2) with such a membrane and a method for producing a hollow membrane (1).

The utility model discloses a water washing membrane separation device for production of isooctyl nitrate, which relates to the technical field of production of isooctyl nitrate and comprises an oil phase separator, a water phase settler and a fiber membrane contactor, the device is characterized in that the cross sections of the oil-phase separator and the water-phase settler are rectangular, distributed speed regulating mechanisms are arranged between the inner walls of the left and right opposite sides of the oil-phase separator and the water-phase settler, and channels are formed between the front and rear sides and the inner walls of the two groups of distributed speed regulating mechanisms; the oil phase separator and the water phase settler are respectively provided with a feeding pipe for feeding distilled water and isooctyl nitrate into the distribution speed regulating mechanism; the flow velocity of the isooctyl nitrate and the water is regulated by the distribution speed regulation mechanism, and the production efficiency can be improved and the production yield can be increased while the washing effect is ensured by optimizing the flow velocity; the water washing time can be shortened through the appropriate flow speed, the energy consumption and the labor cost are reduced, the overall production benefit is improved, and meanwhile it can be guaranteed that isooctyl nitrate and water can make full and even contact through the evenly-dispersed discharging mode.

The utility model discloses a device for removing hydrogen sulfide from oilfield produced water, which can reliably remove hydrogen sulfide gas dissolved in the water, is low in operation energy consumption and reduces the cost. The device comprises a water inlet pipeline; a nitrogen purging pipeline; an exhaust gas emission main pipeline; treated water flows out of the pipeline; each group of hydrogen sulfide removal membrane contactors comprises a contactor body, a water inlet, a water outlet, a purge gas inlet and a waste gas outlet, and the water inlets and the water outlets of all the hydrogen sulfide removal membrane contactors are sequentially connected in series to form a total water inlet and a total water outlet corresponding to the water inlet pipeline; a lifting pump is integrated at an inlet of the water inlet pipeline, and a water inlet flow meter and a plurality of security filters are arranged on the water inlet pipeline in the water flowing direction.

The utility model discloses a novel multi-baffling membrane contactor assembly, which comprises a membrane contactor main body, a membrane shell arranged in the membrane contactor main body, a head cover arranged on the left side of the membrane contactor main body, a tail cover arranged on the right side of the membrane contactor main body, and connecting sleeves arranged in an array in the membrane contactor main body, inserting grooves are formed in the left side and the right side of the connecting sleeve, connectors are formed in the middles of the interiors of the inserting grooves, inserting rings are arranged on the left side and the right side of the membrane shell correspondingly, channel connecting rings are arranged in the middles of the interiors of the inserting rings, and flow splitting baffles are arranged in the middles of the interiors of the membrane shell and the connecting sleeve. The main body of the membrane contactor can be provided with multiple sections of membrane columns, and the membrane contactor is provided with a multi-deflection baffle structure, so that the removal rate of the membrane contactor is improved, the efficiency of the membrane contactor is improved, the water treatment capacity of the membrane contactor is correspondingly improved, the occupied area is reduced, materials are saved, and the pressure loss of equipment is reduced.

The invention relates to a membrane (1) for a membrane contactor (2), which membrane is in the form of a hollow three-dimensional tube structure located on both sides of a plane / central plane (ME), in particular a hollow tube structure which is mirror-symmetrical to the plane / central plane and consists of branched tubes (3, 3´, 3´´, 3´´´, 3´´´´), preferably not exclusively planar branched tubes (3, 3´, 3´´, 3´´´, 3´´´´) having a plurality of branching planes (VE) in parallel with the plane / central plane (ME) on both sides of the plane / central plane (ME), wherein the walls of the tube structure are permeable to substances and / or permeable to energy, and wherein, in the region (B) of each branching plane (VE), each tube (3, 3´, 3´´, 3´´´) extending towards the plane / central plane (ME) branches into a plurality of tubes (3´, 3´´, 3´´´, 3´´´´) extending with respect to the plane / central plane (ME), and the tubes (3´´´´) extending from both sides of the plane / central plane (ME) from the corresponding last branching plane (VE) with respect to the plane / central plane (ME) merge into one another in the region (ÜB) of the plane / central plane (ME). The invention also relates to a membrane contactor (2) having a membrane of this type, and to a method for producing a hollow membrane (1).

The utility model discloses a biogas slurry fertilizer making device based on double-membrane coupling. The device comprises a preheating unit, a feeding side membrane contactor, an absorption side membrane contactor, a gas circulation pipeline, a negative pressure gas pump and a rear end crystallization fertilizer making system. Hydrophobic microporous membrane components are respectively arranged in the feeding side membrane contactor and the absorption side membrane contactor; the gas circulation pipeline is communicated with the gas cavities on the two sides to form a closed loop, and gas circulation is driven by the negative pressure gas pump. And the rear-end crystallization fertilizer preparation system is communicated with the acid liquid cavity of the absorption side membrane contactor and is used for preparing the extracted nutrients into a solid fertilizer. According to the utility model, the closed circulating air flow is used as an intermediate medium, so that the direct contact between the biogas slurry and the acid absorbent is thoroughly avoided, the efficient separation of high-concentration ammonia nitrogen in the biogas slurry and the conversion of high-added-value fertilizer are realized on the premise of not additionally adding chemicals to adjust the pH value, and the system has excellent thermodynamic energy efficiency and energy self-sufficiency characteristic.

The utility model discloses a device for removing hydrogen sulfide in natural gas, which reliably removes hydrogen sulfide gas in the natural gas, is low in operation energy consumption and reduces treatment cost. The device comprises a gas filter. At least one group of hydrogen sulfide removal membrane contactors; each group of volatile organic compound removal membrane contactors comprises a contactor body, a natural gas inlet, a natural gas outlet, an absorbent inlet and an absorbent outlet, all adjacent hydrogen sulfide removal membrane contactors are independently arranged in parallel and form a natural gas inlet header pipe and a natural gas outlet header pipe, a branch of the natural gas inlet header pipe is connected with the corresponding natural gas inlet, and a branch of the natural gas outlet header pipe is connected with the absorbent outlet. Each group of hydrogen sulfide removal membrane contactors are respectively connected in parallel with the natural gas outflow header pipe; the absorbent storage tank comprises an upper-layer cavity and a lower-layer cavity which are separated, an absorbent which does not adsorb hydrogen sulfide is placed in the upper-layer cavity of the absorbent storage tank, and an absorbent which adsorbs hydrogen sulfide is temporarily placed in the lower-layer cavity of the absorbent storage tank; and an absorbent regeneration column.

A semi-integrated method for production of p-hydroxycinnamic acids comprises a first step of enzymatic hydrolysis and a second step of purification of the p-hydroxycinnamic acids, thus released, by liquid / liquid extraction using a membrane contactor. This method enables the purification of p-hydroxycinnamic acids from a plant biomass and the recovery thereof in the organic phase. It is conceivable to recover the p-hydroxycinnamic acids in the aqueous phase after a back-extraction step.

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 application discloses a device and a method for treating ammonia-nitrogen wastewater by using caprolactam sulfate, and the device comprises a filter, a pH value adjusting tank, a cross-flow membrane contactor assembly, a caprolactam sulfate hydrolysis tank and an absorption liquid circulating tank; the filter is connected with the pH value adjusting tank; the pH value adjusting tank is connected with a pipe passage water inlet of a first cross-flow membrane contactor; the caprolactam sulfate hydrolysis tank is connected with an absorption liquid shell passage liquid inlet of the first cross-flow membrane contactor; an absorption liquid shell passage liquid outlet of a last cross-flow membrane contactor is connected with the absorption liquid circulating tank; and the absorption liquid circulating tank is connected with an absorption liquid shell passage liquid inlet of the first cross-flow membrane contactor. The application further discloses a method for treating ammonia-nitrogen wastewater by using caprolactam sulfate. The device is simple, has a large treatment capacity, has a good ammonia removal effect, and is low in energy consumption and cost. The method has a good ammonia removal effect, is low in requirements for acid corrosion resistance of pipelines and equipment, has no extra by-products and three wastes, and realizes neutralization of caprolactam sulfate.

The application discloses an asymmetric structure polytetrafluoroethylene hollow fiber membrane and a preparation method and application thereof, relates to the field of membrane separation technology, and aims to solve the problem that the existing polytetrafluoroethylene hollow fiber membrane is difficult to consider high porosity and small pore diameter. The membrane is asymmetric in the cross-section direction, the average pore diameter of the outer surface is smaller than that of the main body and the inner surface, and the preparation method comprises the steps of mixing, extruding, degreasing, stretching, sintering and asymmetric heat treatment. The core innovation lies in that a dense layer is formed on the outer surface of the membrane through the asymmetric heat treatment process, compared with the fluorine coating method and the wrapping method, no additional materials and complex processes are needed, and the method is easy to scale up. The polytetrafluoroethylene hollow fiber membrane prepared by the application has the characteristics of high porosity and high liquid penetration pressure, the smaller pore structure of the outer surface endows the membrane with better wet resistance, and the high porosity of the main body makes the membrane have lower mass transfer resistance, and the membrane is suitable for a membrane contactor process with liquid in the shell.

The utility model discloses a system for removing carbonate radicals from wastewater and preparing pure carbon dioxide gas, which has the advantages that the operation energy consumption is reduced, the treated carbon dioxide can be directly utilized, and the greenhouse effect is reduced. The acid adding reaction storage tank comprises a tank body, an acid flow inlet, a wastewater inlet and a wastewater flow outlet; a lifting pump is integrated at an inlet of the wastewater circulation pipeline, and a plurality of security filters are arranged on the wastewater circulation pipeline in the wastewater circulation direction; the decarburization membrane contactor comprises a contactor body, a wastewater inlet, a wastewater outlet, a purging liquid inlet and a purging liquid outlet, the alcohol amine circulating tank comprises a top outlet, a top reflux inlet, a bottom flow inlet and a bottom discharge port; an alcohol amine collecting tank; and the desorption tower comprises a bottom mixing inlet, a top gas outlet and a liquid outlet on one side of the upper part.