243 results about "Membrane reactor" patented technology

The present application relates to a kind of full solid-state lithium ion membrane reactor with symmetrical structure and its application, the reactor is in situ construction on the both sides of solid-state lithium ion conductor film with Pt and / or Ni as catalyst, with single-walled carbon nanotube etc. Conductive material is used as current collector gas diffusion electrode, the reactor can work in nitrogen hydrogen mixture atmosphere, integration is high, scale is flexible.The present application changes the working mode of traditional reactor using liquid electrolyte, replaces inefficient nitrogen and proton mass transfer with efficient lithium ion mass transfer, couples lithium-mediated nitrogen reduction and hydrogen oxidation reaction to synthesize ammonia, and the maximum working current density is increased to 1000mA / cm 2 , and can work at 40mA / cm 2 Current density for a long time, with innovation and broad industrial application prospect.

This invention relates to an in-situ detection system for a rotating microliquid film reactor (MFR) for monitoring the nucleation behavior of nanomaterials. The reactor comprises a rotor and a stator, with a stator base angle of 70-85°, a rotational speed of 500-5000 rpm, and a slit width of 10-500 μm to ensure that fluid passing through the slit does not undergo backmixing and to create a strong shear field. A micro-negative pressure sampler is fabricated to capture nucleating particles within the high-speed shear field and bring them into the visible observation area. A high-speed camera and microscope objective are connected in situ, thereby acquiring instantaneous images of the nucleation process at the nanoscale and capturing the transient evolution behavior of crystal nuclei. The construction of this rotating MFR in-situ detection system solves the problems of poor micro-mixing effects and uncontrollable nucleation and growth in traditional stirred tank reactors, leading to poor quality in large-scale preparations, and the inability to observe phase transitions and instantaneous nucleation processes in a closed reactor. The obtained hydrotalcite nucleation results enrich non-classical nucleation theories and provide guidance for the large-scale preparation of nanomaterials.

The invention discloses an efficient treatment process for salt-containing industrial wastewater, and relates to the technical field of wastewater treatment. Salt-containing industrial wastewater sequentially passes through an adjusting tank, a silicon and hardness removal unit, a biochemical unit, a secondary sedimentation tank, a fluorine removal unit, a filter unit, a catalytic ozonation unit, a moving bed bio-membrane reactor treatment unit, a powder carbon sedimentation unit and an ultrafiltration-reverse osmosis double-membrane unit to be treated, produced water is recycled, and concentrated water enters an evaporation and concentration unit; the silicon removal and hardness removal unit is used for treating the wastewater by adding a flocculating agent and a composite coagulant aid; the flocculating agent is a chitosan-based flocculating agent, and the addition amount of the flocculating agent is 10 to 20 mg / L; the composite coagulant aid is composed of a magnesium-aluminum hydrotalcite coagulant aid and alginic acid-silicate hybrid microgel according to the mass ratio of 2: (1-4), and the addition amount of the composite coagulant aid is 5-15 mg / L. The treatment effect of the salt-containing industrial wastewater is remarkably improved.

The embodiment of the utility model provides an algal-bacterial symbiotic membrane aeration bio-membrane reactor, the algal-bacterial symbiotic membrane aeration bio-membrane reactor comprises a container, a membrane assembly, a carbon dioxide supply device, an oxygen supply device and a light source, the membrane assembly is arranged in the container, the membrane assembly comprises a first membrane wire group and a second membrane wire group which are arranged at an interval, the carbon dioxide supply device is connected with the air inlet of the first membrane filament group to provide carbon dioxide for the first membrane filament group, the carbon dioxide is connected with the air inlet of the second membrane filament group to provide oxygen for the second membrane filament group, and the light source irradiates the first membrane filament group. The bacteria-algae symbiotic membrane aeration bio-membrane reactor disclosed by the embodiment of the utility model has a relatively strong sewage treatment effect.

The invention discloses a tubular dynamic membrane sulfur autotrophic denitrification device and method, the device comprises: a housing, which is composed of a middle cylindrical structure and two end hemispherical structures, the upper part of the cylindrical structure is provided with a purified water outlet, the lower part is provided with a backwashing port, and the top end of the hemispherical structure is respectively provided with a sewage inlet and a concentrated liquid outlet; the plurality of supporting bodies are arranged in parallel, each supporting body is composed of two layers of honeycomb-shaped PVC grids and a layer of polypropylene net, and the polypropylene net is clamped between the two layers of honeycomb-shaped PVC grids; the two splitter plates are fixed to the two ends of the supporting body respectively, and splitter holes corresponding to the supporting body are formed in the splitter plates; a large-aperture polypropylene net is used as a filtering support body, and powdered sulfur is used as a precoating agent, so that the problems of difficulty in powdered sulfur recovery and serious loss in the traditional sulfur autotrophic process are solved; meanwhile, sulfur powder with a certain particle size is used as a dynamic membrane reactor of a precoating agent, nitrate nitrogen can be efficiently removed, the effluent quality is improved, and meanwhile the dynamic membrane reactor has the advantages of being resistant to pollution and easy to clean.

The invention belongs to the technical field of preparation of corn oligopeptide, and particularly relates to a preparation method of corn oligopeptide, which comprises the following steps: by taking corn protein powder as a raw material, carrying out ethanol-alkali composite pretreatment to obtain a corn protein solution; the corn protein liquid is pretreated through three-stage cooperative treatment of ultrasonic waves, microwaves and high-pressure homogenization; feeding the pretreated corn protein liquid into a three-area circulation type membrane reactor to carry out space-time coupling catalytic reaction; key parameters are monitored in real time through an online monitoring system, and technological conditions are dynamically regulated and controlled through an AI model; after the reaction is finished, performing membrane separation purification and drying to obtain a corn oligopeptide finished product; the utilization rate of the corn protein powder is improved, and high-value utilization of agricultural product processing byproducts is realized; the corn protein enzymolysis efficiency is improved; the bitterness value does not exceed 1; the corn oligopeptide prepared by the preparation method of the corn oligopeptide is applied to the preparation of blood pressure reducing functional food and the preparation of antioxidant cosmetics.

The invention discloses a method for realizing deep autotrophic nitrogen removal of sludge digestion liquid based on alternate intermittent aeration of a double-membrane aeration bio-membrane reactor (MABR). The process device comprises a sludge digestion liquid raw water tank, a single-stage double-MABR reactor, two MABR devices and a water outlet tank. According to the method, sludge digestion liquid enters the single-stage double-MABR reactor, the two MABR devices are alternately and intermittently aerated, the state of one aeration and one aeration stopping is always kept, and ammonia nitrogen in raw water is converted into nitrite through ammonia oxidizing bacteria enriched on the inner side of an MABR membrane. And simultaneously supplying to anaerobic ammonium oxidation bacteria enriched on the outer sides of the two MABR membranes through matrix diffusion for denitrification and generation of nitrate. Denitrifying bacteria enriched on the outer side of the MABR membrane utilize raw water organic matters to drive short-cut denitrification to synchronously supply nitrite to anaerobic ammonium oxidation bacteria so as to realize deep autotrophic nitrogen removal. According to the invention, a double-anaerobic ammonia oxidation reaction hot area is constructed through alternate intermittent aeration of double MABRs, and efficient deep autotrophic nitrogen removal of the sludge digestion liquid can be stably realized.

The invention provides a Joule thermally driven CO2 rapid desorption method based on a hollow fiber carbon film. The conductive hollow fiber carbon film is used as a reactor; the method comprises the following steps: pumping an absorption solution of saturated CO2 into a tube pass of a membrane reactor, simultaneously applying voltage to a component to generate Joule heat, vacuumizing a shell side of the component, separating desorbed carbon dioxide and barren liquor through a gas-liquid separation tank, and then collecting the desorbed carbon dioxide and barren liquor. The problems of high energy consumption and slow desorption of a traditional process are solved, the energy consumption-rate mutual exclusion dilemma in the amine solution regeneration process is overcome, the phenomena of amine degradation and equipment corrosion are relieved, and the dynamic response speed and comprehensive performance of a desorption system are improved.

The invention discloses a method and a device for degrading bisphenol A by using a propane matrix membrane bio-membrane reactor, and belongs to the technical field of microorganism application. The method specifically comprises the following steps: inoculating activated sludge into a membrane bio-membrane reactor with a basic inorganic salt culture medium, and introducing propane to promote the growth of a bio-membrane on hollow fiber membrane filaments in the membrane bio-membrane reactor, so as to obtain the membrane bio-membrane reactor after membrane formation is completed; the method comprises the following steps: introducing bisphenol A-containing wastewater to be treated into a membrane bio-membrane reactor, continuously introducing propane, and inducing microorganisms to express alkane monooxygenase and cytochrome P450 monooxygenase, thereby promoting hydroxylation of bisphenol A and degrading bisphenol A into a downstream product of which the toxicity is lower than that of bisphenol A. The propane is used as a carbon source and an electron donor, the propane can be efficiently utilized to provide a safe and good environment for biodegradation of bisphenol A, and secondary pollution possibly caused by a traditional carbon source is avoided.

The application discloses a MABR membrane aeration biofilm reactor for advanced treatment of sewage, and belongs to the technical field of sewage treatment. The height of the moving seat is adjusted through the adjusting assembly. The fixed ring drives the flexible ring and the scraper to rotate through the plurality of elastic columns, and the mud and impurities attached to the outside of the MABR membrane are scraped. The elastic column and the flexible ring are deformed under the action of external force and are in flexible contact with the outside of the MABR membrane through the scraper, so that the damage of the scraper to the MABR membrane is prevented, and the closely attached biofilm fragments or hard scale on the MABR membrane can be removed. Since the plurality of scrapers are located between the two suction pipes, the fallen mud and impurities can be effectively extracted by the suction holes, so that the secondary pollution of the MABR membrane caused by the floating mud and impurities is prevented. Therefore, the traditional cleaning method of using a single flushing method or using a chemical cleaning method is abandoned, the cleaning effect is improved without damaging the MABR membrane, and the service life of the MABR membrane is prolonged.

The invention relates to a method for preparing methanol through hydrogenation of carbon dioxide. The method comprises the following steps: sequentially introducing raw material gas into a first fixed bed reactor filled with a catalyst, the interior of a membrane tube of a first membrane reactor, a second fixed bed reactor filled with a catalyst, the interior of a membrane tube of a second membrane reactor and a third fixed bed reactor filled with a catalyst; purging gas is respectively introduced into the exterior of the membrane tube of the first membrane reactor and the exterior of the membrane tube of the second membrane reactor; the catalyst comprises a metal oxide carrier and an active metal component, the active metal component is Pd, and the metal oxide carrier is an indium-zirconium composite oxide with an ordered mesoporous structure; the membrane tube of the first membrane reactor and the membrane tube of the second membrane reactor respectively comprise a membrane support body and a membrane functional layer covering the inner surface of the membrane support body, and the membrane functional layer is a molecular sieve membrane. The method provided by the invention has high catalytic activity and selectivity, and can significantly improve the conversion rate of carbon dioxide and the content of methanol in the product.

The utility model discloses a biological membrane car washing sewage circulating filter with an external vibrator. The biological membrane car washing sewage circulating filter with the external vibrator comprises a pretreatment system, a biological membrane reactor, a vibrator device, a filtering system, a disinfection system and a water circulation system, the vibrator device is externally arranged, so that the occupied space in the bio-membrane reactor can be reduced, and the distribution of a flow field and a bio-membrane in the bio-membrane reactor cannot be directly influenced. The vibrator device is arranged outside, so that the vibrator device is more convenient to overhaul, maintain and replace, and the internal structure of the bio-membrane reactor does not need to be disassembled.

The invention provides a preparation method of L-valine. The method comprises the following steps: (1) immobilizing thalli in a seed culture solution by adopting a hollow cellulose membrane reactor in a fermentation system to obtain thalli immobilized on a hollow cellulose membrane; wherein the hollow cellulose membrane reactor comprises a hollow cellulose membrane; (2) circularly flushing the thalli fixed on the hollow cellulose membrane by adopting a fermentation culture medium to ferment the thalli fixed on the hollow cellulose membrane, and performing temperature control on the fermentation process by utilizing a plate heat exchanger to obtain fermentation liquor; and (3) carrying out anaerobic catalysis on the fermentation liquor by utilizing a catalytic culture medium. The method has obvious energy-saving and consumption-reducing effects, does not need to filter again to remove bacteria and impurities, and reduces the cost.

The invention relates to the field of chemical equipment, in particular to a 1-nitroanthraquinone continuous production process based on a dynamic liquid membrane continuous flow reactor, which comprises a solid feeding device, a homogeneous emulsifier, a quenching kettle, a solid-liquid separator, a centrifugal separator and a dynamic liquid membrane reactor, a sulfuric acid storage tank is divided into two branches through a sulfuric acid feeding pump, one branch is connected to the dynamic liquid membrane reactor, the other branch is connected to the dynamic liquid membrane reactor through a flow self-control valve, the quenching kettle is connected to a solid-liquid separator, the solid-liquid separator is divided into two branches, one branch is connected to an anthraquinone crude product storage tank, the other branch is connected to a centrifugal separator, and the other branch is connected to a gas-liquid separator. The centrifugal separator is divided into two branches, one branch is connected to the acid water storage tank, and the other branch is connected to the dichloroethane storage tank, so that the reaction selectivity of the anthraquinone nitration reaction can be effectively improved, high-viscosity solids are prevented from being blocked, and the conversion rate of raw materials in the continuous reaction of the anthraquinone nitration reaction is improved.

The application provides a multi-element circulating elution type photocatalytic falling film reactor, which comprises a shell and photocatalytic fiber membranes, a first cavity is formed in the shell, a plurality of partition plates and photocatalytic fiber membranes are fixedly arranged in the first cavity, characterized in that a plurality of light sources are arranged on the two side surfaces of the photocatalytic fiber membranes, a spraying mechanism is arranged on the partition plates and the photocatalytic fiber membranes, the spraying mechanism comprises a main spraying assembly and a secondary spraying assembly, a first opening is formed in the shell, a connecting pipe is fixedly connected to the first opening, and the connecting pipe is fixedly connected with the secondary spraying assembly. According to the scheme, the circulating spraying mechanism is arranged in the first cavity, and a plurality of photocatalytic fiber membranes are vertically arranged, so that the organic wastewater is circulated through the main spraying assembly and the secondary spraying assembly, and the vertically arranged photocatalytic fiber membranes can be fully contacted with the organic wastewater, thereby achieving the purpose of ensuring the purification rate of the organic matter in the organic wastewater.

This invention belongs to the field of hydrogen production technology, specifically relating to a method and application of hydrogen production via an oxygen-permeable membrane. The method includes the following steps: (1) introducing water vapor into a second oxygen-permeable membrane reactor R2 to generate a high-temperature reactive gas 1; (2) mixing the remaining hydrogen-containing gas on the water vapor side of the second oxygen-permeable membrane reactor R2 with the high-temperature reactive gas 1 and introducing it into a first oxygen-permeable membrane reactor R1; (3) introducing water vapor into the first oxygen-permeable membrane reactor R1, where oxygen migrates through the oxygen-permeable membrane to the oxygen side and reacts with the mixed gas 1 to generate a high-temperature reactive gas 2; (4) introducing a portion of the high-temperature reactive gas 2 as a circulating gas into the second oxygen-permeable membrane reactor R2 and mixing it with fuel; (5) introducing the remaining hydrogen-rich gas on the water vapor side of the first oxygen-permeable membrane reactor R1 into a first condenser C1 to obtain high-purity hydrogen. This invention further reduces energy consumption while increasing the production rate, providing a convenient, efficient, and economical way to produce hydrogen.

The utility model provides a sludge self-inoculation type bio-membrane reactor, which relates to the technical field of bio-membrane reactors and comprises a reactor, a storage tank and a clean water tank, the storage tank and the clean water tank are respectively arranged on the left side and the right side of the reactor, a packing area is arranged on the lower portion inside the reactor, and a lifting pump is arranged at the bottom inside the storage tank. A filler area is arranged in the reactor, a water inlet area is arranged at the lower part in the reactor, a bearing plate is arranged in the reactor below the filler area, the output end of the lifting pump is connected with the water inlet area through a connecting pipe, and an air blower is arranged at one side of the reactor; according to the utility model, continuous contact can be formed between inoculated sludge and biological stuffing, the contact time and the inoculation area are increased, the formation process of a biological membrane is accelerated on the basis of providing external oxygen supply and nutrition conditions, the formation time is shortened, the adhesion effect is optimized, and a good inoculation effect is achieved in the inoculation process of domestic sewage with a low carbon-nitrogen ratio.

To provide a membrane reactor capable of improving yield of a target product by progressing efficiently a catalyst reaction, in a reaction controlled by chemical equilibrium.SOLUTION: Concerning a membrane reactor for performing a reaction controlled by chemical equilibrium, the membrane reactor has a separation membrane for selectively and continuously separating, from reaction liquid, a by-product generated by the reaction. By selectively and continuously separating the by-product from the reaction liquid, the chemical equilibrium is shifted and the reaction is furthermore progressed.SELECTED DRAWING: None

The present application relates to a kind of synthesis method and device of isosorbide, comprising (1) the homogeneous mixture of sorbitol aqueous solution and solid catalyst in preheater, from the upper end of membrane reactor feed, under vacuum condition reaction, product flows from the lower end of reactor;(2) the separated solid catalyst after the dissolved product of flowing out is added organic solvent, filtrate is crystallized by cooling, and the product isosorbide is prepared.The present application selects membrane reactor and combines fluorine modified solid catalyst to carry out synthesis reaction, while ensuring yield, so that water can be quickly removed from the reaction system, reduce byproduct generation, avoid catalyst blockage, and prolong the service life of catalyst.

The application provides an electrochemical double membrane reactor and a wastewater treatment method based on the electrochemical double membrane reactor, and belongs to the field of membrane separation and electrochemical advanced oxidation technology. The wastewater treatment method based on the electrochemical double membrane reactor is coupled with membrane separation and electrochemical advanced oxidation technology, a first conductive microporous membrane is used as an anode membrane, a second conductive microporous membrane is used as a cathode membrane, the anode membrane generates hydroxyl radicals by electrolysis of water, the cathode membrane generates H2O2 by electro-reduction of oxygen and further converts the H2O2 into hydroxyl radicals through a Fenton catalyst, and the two cooperate to generate singlet oxygen, so that removal of refractory organic matter and / or heavy metals in wastewater is realized. The electrochemical double membrane reactor can make multiple active substances act together in the electrochemical process, removal of refractory organic matter and heavy metals in wastewater is realized, and the electrochemical double membrane reactor can be widely applied to treatment and reuse of industrial wastewater, landfill leachate and the like.

The invention belongs to the technical field of photosensitive enzyme membrane reactors, and particularly relates to a transition metal-based porphyrin photosensitive enzyme membrane reactor based on 2-methylimidazole regulation and a preparation method and application thereof. The porphyrin photosensitive enzyme membrane reactor comprises a transition metal-based porphyrin photosensitive membrane doped with 2-methylimidazole and light decarboxylase loaded on the photosensitive membrane, and the transition metal-based porphyrin photosensitive membrane doped with 2-methylimidazole is a tetra (4-hydroxyphenyl) zinc porphyrin photosensitive membrane doped with 2-methylimidazole; the light decarboxylase is fatty acid light decarboxylase of chlorella variants NC64A (chlorella vulgaris NC64A). According to the transition metal-based porphyrin photosensitive enzyme membrane reactor based on 2-methylimidazole regulation and control, the technical problems that the enzyme stability is poor and the recovery is difficult due to the fact that a traditional porphyrin membrane immobilized enzyme is easy to fall off are effectively solved; and the transition metal-based porphyrin photosensitive enzyme membrane enables the catalytic efficiency of the immobilized photo-decarboxylase to be improved to a great extent.

The utility model provides an algal-bacterial symbiotic bio-membrane reactor for sewage treatment, which comprises a reactor body, the reactor body comprises a tank body, a reaction cavity is formed in the tank body, suspended filler is arranged in the reaction cavity, the suspended filler is scattered in the reaction cavity, a rotating shaft is arranged in the tank body in a penetrating manner, and the rotating shaft is connected with the tank body. One end of the rotating shaft extends into the reaction cavity, and a biological rotating disc and a vortex assembly are arranged at the end, located in the reaction cavity, of the rotating shaft; the vortex assembly comprises an impeller and an impeller ridge arranged on the impeller, and the rotating shaft is sleeved with the impeller. The sewage treatment device has the advantages of high sewage treatment efficiency and low energy loss.

The invention belongs to the technical field of silicone rubber synthesis, and discloses a process and a device for continuously and efficiently producing methyl vinyl silicone rubber by a two-step method. The process comprises the following steps: taking a falling film reactor as a reactor, mixing a linear body and a low-activity catalyst A, pumping the mixture into the reactor from the upper part of the reactor, and reacting to prepare an intermediate product; and mixing the intermediate product with a catalyst B and an end-capping reagent, and carrying out a secondary reaction in the screw mixer to obtain the methyl vinyl silicone rubber. According to the process, in the first step, a cavity type falling film reactor device is utilized, a linear body is adopted as a raw material, an intermediate product is prepared firstly, and the problems that in the prior art, the yield is low and the content of a ring body in a product is large due to the fact that the ring body is adopted as the raw material are solved; and carrying out secondary reaction to quickly prepare a high-molecular-weight product with stable performance. According to the process, continuous, rapid and efficient synthesis can be realized, byproducts in the product are few, the yield reaches 97%, the ring body content is lower than 1300ppm, and the stability of products among batches is good.

The invention provides a method for preparing methanol by hydrogenating carbon dioxide, which is characterized by comprising the following steps of: introducing raw material gas into the outer side of a membrane tube of a membrane reactor, and introducing purging gas into the inner side of the membrane tube of the membrane reactor; wherein the membrane tube of the membrane reactor comprises a membrane support body and a membrane functional layer covering the outer surface of the membrane support body; the membrane functional layer is a CHA molecular sieve membrane; the outer part of the membrane reaction cavity is filled with a catalyst; the catalyst comprises a metal oxide carrier and an active metal component loaded on the metal oxide carrier; the active metal component is Pd, and the metal oxide carrier is an indium-zirconium composite oxide with an ordered mesoporous structure. The membrane reactor is adopted to reinforce the CO2 hydrogenation methanol preparation reaction, so that water generated in the reaction process can be removed in time, and the methanol catalytic reaction is effectively promoted.

This invention discloses a comprehensive utilization method for the step-by-step conversion of mother liquor in lithium salt production, relating to the field of lithium salt preparation technology. The method includes: feeding lithium enrichment transformation liquid A (after liquid shaping) and sodium carbonate solution B1 into a micro-liquid membrane reactor MMR-101, where underequivalent transient nucleation occurs under conditions of η1 of 0.55-0.68; the resulting nucleated slurry enters the first-stage continuous crystallizer G1, where sodium carbonate solutions B2, B3, and B4 are distributedly added along the effective residence time axis; then it enters the second-stage continuous ripening crystallizer G2, where sodium carbonate solution B5 is added at the G2 inlet; and lithium carbonate is obtained through low-shear ripening, hot solid-liquid separation, hot displacement washing, and low-temperature vacuum drying. This method can suppress localized excessive nucleation and pulverization, reduce Na, S, and B entrainment, narrow particle size distribution, increase filtration flux, reduce washing water consumption, and extend continuous stable operation time.

This invention provides an electrochemical membrane reactor and its application in acidic wastewater treatment, belonging to the field of wastewater treatment, and particularly relating to the treatment of acidic wastewater. The device mainly includes membrane electrodes (including anodes and cathodes, with the number of cathodes and anodes being the same), an electrolytic cell, an acidic wastewater neutralization tank, a product water tank, and a DC power supply. The membrane reactor applies an electric field to the cathode and anode membrane electrodes via the power supply, generating hydroxide ions on the cathode surface to neutralize the acidic wastewater in the neutralization tank. Excess hydroxide ions can combine with heavy metal ions to form hydroxide precipitates. Simultaneously, a water pump extracts the clarified liquid containing organic pollutants after the reaction, and the organic pollutants in the water are degraded through electrochemical oxidation at the anode. This reactor can achieve the neutralization of acidic wastewater and the removal of heavy metal ions without the addition of external chemical reagents, while simultaneously electrochemically oxidizing and degrading organic pollutants in the water.

This invention discloses a synergistic modification method for improving the CO2 decomposition performance of ceramic membrane reactors. By preparing a dense membrane substrate containing fluorite and B-site-doped perovskite phases, and constructing an A-site-defect perovskite porous coating on the CO2 feed side, the synergistic regulation of substrate stabilization and surface activation is achieved. The B-site-doped membrane substrate provides a stable transmembrane transport channel for oxygen species generated during CO2 decomposition, while the A-site-defect coating enhances the generation process of oxygen species on the CO2 feed side. Together, they reduce the resistance to surface reactions and oxygen migration on the CO2 side, enabling the membrane reactor to maintain long-term stable operation even at high CO2 decomposition rates. This invention provides an effective substrate-coating synergistic modification method for improving the CO2 decomposition rate and long-term operational stability of membrane reactors.

The invention discloses a spiral symmetrical flow anaerobic membrane bio-membrane reactor system, which comprises a spiral symmetrical flow anaerobic reactor and a membrane aeration bio-membrane reactor, the spiral symmetrical flow anaerobic reactor is sequentially provided with a water inlet pump, a water inlet pipe, a first anaerobic reaction zone, a second anaerobic reaction zone, a third anaerobic reaction zone, a main gas outlet pipe and a water outlet pipe from bottom to top; the membrane aeration bio-membrane reactor is sequentially provided with a water inlet pump, a water inlet pipe, an MABR third reaction zone, an MABR second reaction zone, an MABR first reaction zone, a membrane assembly, an air inlet assembly and a water outlet pipe from bottom to top. According to the invention, gas-liquid interaction among multiple reaction intervals is realized through the gas pump and the liquid pump, precise regulation and control of gas partial pressure and reflux flow are realized, and the system has the characteristics of enhancing mass transfer driving force, improving methane yield, optimizing denitrification efficiency and the like, so that the system can adopt a green and low-carbon water treatment route, and meanwhile, efficient and intensive reactor combination is realized.

The invention relates to the technical field of chemical equipment, in particular to a hydroxyacetonitrile continuous reactor which comprises a first-stage falling film reactor, a second-stage mixing reactor, a first-stage circulating pipeline and a second-stage circulating pipeline, after hydrocyanic acid mixed gas enters the first-stage falling film reactor, formaldehyde and first-stage circulating liquid enter the first-stage falling film reactor from the two sides of the top of the first-stage falling film reactor respectively, and then formaldehyde and second-stage circulating liquid enter the second-stage falling film reactor; uniform falling films are formed on the inner walls of a plurality of reaction flow guide pipes and react, and cooling water outside the pipes circulates to timely remove reaction heat; after the primary reaction, returning one part of the material to the top through a primary circulation pipeline for continuous reaction, and enabling the other part to enter a secondary mixing reactor; and in the second-stage mixing reactor, the residual hydrocyanic acid is further mixed and reacted with glycolonitrile returned by a second-stage circulating pipeline, part of the final product is extracted, and part of the final product is circulated back to a second-stage circulating material inlet. The system strengthens heat and mass transfer through a falling film structure, and ensures full reaction of raw materials through two-stage circulation, and the product quality is stable.

The invention discloses a perfluorinated compound removal system and method based on a membrane bio-membrane reactor, and belongs to the technical field of sewage treatment and recycling. Wastewater containing perfluorinated compounds is introduced into a membrane aeration bio-membrane reactor inoculated with anaerobic sludge in a sequencing batch or continuous manner, and hydrogen is introduced into a hollow fiber membrane. The method comprises the following steps: firstly, aerating inlet water to enable dissolved oxygen to be lower than 0.05 mg / L, and adjusting the pH to be 6.5-7.5; meanwhile, the hydrogen supply pressure is adjusted, electron donors are provided for reduction of perfluorinated compounds, and a stable hydrogen matrix membrane biological membrane is formed on the surface of the hollow fiber membrane. The sequencing batch reaction mode and the continuous flow reaction mode both can achieve more than 99% of pollutant conversion, and achieve more than 20% of biological defluorination rate for the first time. The biological membrane does not need to be externally added with an organic carbon source, efficient biological reduction defluorination is directly carried out through hydrogen and microorganisms, and the biological membrane has the advantages of being low in energy consumption, green, free of secondary pollution and the like.