3311 results about "Reaction zone" patented technology

The invention relates to the technical field of biological sewage treatment, in particular to a device and a method for improving the autotrophic nitrogen removal performance of an MABR (Membrane Ammonia Baffled Reactor). Coupling of partial nitrosation reaction and anaerobic ammonia oxidation reaction is completed; through a circular reaction zone and a membrane reaction zone in the reaction tank, nitrate nitrogen generated by anaerobic ammonia oxidation and excessive nitrite nitrogen during instability regulation are circularly removed, and the purpose of improving the total nitrogen removal effect of the reactor is achieved; a proper amount of a sodium nitrite solution is added at proper time, the concentration of free nitrous acid in a mixed solution of the reactor is increased, and the intermittent proportion of MABR intermittent aeration is synchronously regulated and controlled, so that the activity of nitrite oxidizing bacteria is synergistically inhibited by low dissolved oxygen and high free nitrous acid, and the unstable short-cut nitrification reaction is recovered again; the autotrophic nitrogen removal performance of the reactor is improved.

Methods and systems for converting a renewable fuel intermediate composition to finished transportation fuel are provided herein. In some examples, a renewable fuel intermediate composition is flowed over a first catalyst in a first reaction zone to generate a saturated, hydrodeoxygenated product. A liquid portion of the renewable fuel intermediate composition may be characterized as having more than about 70 wt % of the oxygen being within ketone groups. The saturated, hydrodeoxygenated product may be flowed over a second fixed-bed catalyst in a second reaction zone to generate a product including the finished transportation fuel.

The invention belongs to the technical field of water treatment, and particularly relates to a whole-process three-stage linkage control intelligent flocculation dosing method, which comprises the following steps: collection: collecting water quality and water quantity parameters of inlet water and outlet water in real time in the water treatment process; collecting a floc image in the reaction process, analyzing the particle size distribution and the breakage rate of the floc image, and collecting a torque parameter of a stirring device at the same time; according to the invention, multiple types of sensors are deployed in the water inlet area of the flocculation tank, the reaction area and the water outlet area of the sedimentation tank, water quality, water quantity and reaction process parameters are collected in real time, and edge calculation and cloud optimization technologies are combined, so that full-flow intelligent control from agent pre-feeding, reaction process regulation and control to water outlet effect refinement is realized; the method is suitable for scenes such as municipal sewage treatment plants and industrial wastewater treatment stations requiring precise control of flocculant addition, and is especially suitable for water treatment processes with frequent water quality fluctuation and sensitive agent cost, so that the treatment efficiency can be remarkably improved, and the operation cost can be reduced.

The invention discloses a phosphorus oxyfluoride reaction and separation integrated preparation tower, and belongs to the field of industrial equipment for phosphorus oxyfluoride preparation, the preparation tower comprises a tower body, the tower body is provided with a feeding area, a reaction area and a separation area, the feeding area and the separation area are both filled with filler sections of filler, a first feeding port is formed in the bottom of the filler section in the feeding area, and a second feeding port is formed in the bottom of the reaction area. A tubular heat exchanger is arranged in each reaction zone, a threaded pipe is arranged on each tubular heat exchanger, filler is also filled between the threaded pipes, a second feeding hole is formed in the upper part of the reaction zone on the top layer, and polyphosphoric acid and anhydrous hydrogen fluoride are contacted in the reaction zones to form a concentration stepped reaction and a temperature stepped reaction; and the phosphorus oxyfluoride gas generated after the reaction is fractionated through the filler section on the separation area and enters the next process from the top of the tower body. According to the invention, the reaction and separation of phosphorus oxyfluoride production are integrated, the energy consumption of phosphorus oxyfluoride production is reduced, the production cost is reduced, and the reaction yield is improved.

The invention provides a method for constructing a thickened flame surface model of hydrogen turbulent combustion, which belongs to the technical field of hydrogen fuel engines, and specifically comprises the following steps: modeling a diffusion enhancement effect and a flame surface wrinkle effect caused by multi-scale turbulent flow by constructing a hydrogen fuel turbulent flame speed scale rate under a wide working condition; and the combustion process of the hydrogen fuel can be described more accurately. In addition, on the basis of a thin reaction zone combustion mode, key physical quantities are extracted, a combustion efficiency function is optimized, multi-scale turbulence and a difference diffusion effect are considered, and the thickened flame surface model is further perfected. The development of the method provides powerful technical support for the forward design of the hydrogen fuel engine based on numerical simulation, promotes the engineering application of the hydrogen fuel engine, and assists the hydrogen fuel engine to play a greater role in efficient, clean and safe energy transformation.

Herein discussed is a hydrogen production system comprising a first reactor zone and a second reactor zone, wherein both reactor zones comprise an ionically conducting membrane, wherein the first zone is capable of reforming a hydrocarbon electrochemically and the second zone is capable of performing water gas shift reactions electrochemically, wherein the electrochemical reforming reactions involve the exchange of an ion through the membrane to oxidize the hydrocarbon and wherein electrochemical water gas shift reactions involve the exchange of an ion through the membrane and include forward water gas shift reactions, or reverse water gas shift reactions, or both. In an embodiment, the membrane is mixed conducting. In an embodiment, the membrane comprises an electronically conducting phase and an ionically conducting phase.

The invention belongs to the technical field of wastewater denitrification treatment, and particularly relates to an anaerobic ammonia oxidation reaction-based integrated partitioned denitrification method which comprises the following steps: S1, removing high-concentration organic matters and suspended matters in wastewater through coagulating sedimentation or chemical oxidation pretreatment to avoid inhibition on subsequent Anammox; s2, partitioning the integrated reactor, and setting a short-cut nitrification region and an Anammox reaction region; s3, enabling the effluent part of the Anammox reaction zone to flow back to the short-cut nitrification zone, supplementing nitrite and balancing the carbon nitrogen ratio; the Anammox granular sludge flows back to the reaction zone through the settling zone, and the biomass concentration and the reaction efficiency are maintained; s4, a secondary sedimentation tank or a built-in sedimentation zone is arranged to achieve mud-water separation, residual sludge is discharged, and it is guaranteed that effluent reaches the standard, and it is guaranteed that the denitrification efficiency is stable by dynamically adjusting dissolved oxygen of the short-cut nitrification zone and the pH value of the Anammox reaction zone.

A device and method for enhancing nitrogen and phosphorus removal based on a multistage AO partial denitrification coupled with Anammox process in combination with a sludge hydrolytic acidification mixture belong to the technical field of active sludge method wastewater treatment. A system includes a water tank, a water pump, a biochemical reaction zone, a hydrolytic acidification tank and other devices. A multistage AO step-feed pipeline is used to inject raw water into the reaction zone in a segmented manner, guaranteeing efficient utilization of organic matter in the raw water; biofilm carriers are added into an anaerobic zone and anoxic zones to enrich anammox bacteria, and nitrite nitrogen produced by partial denitrification provides a substrate for the anammox bacteria to realize autotrophic nitrogen removal; a nitrification and phosphorus accumulating bacteria aerobic phosphorus uptake are performed in aerobic zones; and part of excess sludge in a secondary sedimentation tank enters the hydrolytic acidification tank to convert macromolecular organic matter into low molecular weight organic matter, a hydrolytic acidification mixture and the excess sludge in the secondary sedimentation tank synchronously flow back to the anaerobic zone, and as a high-quality carbon source, the low molecular weight organic matter can promote partial denitrification. The system provides a novel method for efficient and energy-saving treatment of municipal wastewater.

The invention discloses a pulverized coal boiler SNCR reaction area temperature field prediction method and prediction system. The pulverized coal boiler SNCR reaction area temperature field prediction method comprises the steps that a numerical simulation model of a pulverized coal boiler is established; a temperature field database under the full working condition of the pulverized coal boiler is simulated and obtained, the temperature field database at least comprises a temperature measurement position temperature field and an SNCR reaction area temperature field, and the temperature measurement position is located in the pulverized coal boiler and located on the upstream side and / or the downstream side of the SNCR reaction area; based on the temperature field database, taking the temperature measurement position temperature field as an input quantity and the SNCR reaction area temperature field as an output quantity to train a neural network, and obtaining an SNCR reaction area temperature field neural network prediction model; and measuring the temperature field of the temperature measurement position, inputting the temperature field into the SNCR reaction area temperature field neural network prediction model, and outputting the SNCR reaction area temperature field through the SNCR reaction area temperature field neural network prediction model. According to the prediction method provided by the invention, the measurement difficulty of the flue gas temperature of the SNCR reaction area can be reduced.

The invention provides an electrochemical active oxygen supply device for a washing machine and a preparation method. The device comprises a shell, a single closed reaction chamber is formed in the shell, a bifunctional anode electrode and a bifunctional cathode electrode are integrated in the reaction chamber, and a compact and uniform reaction area is formed between the anode electrode and the cathode electrode. When water flows through the reaction area, hydrogen peroxide (H2O2) and / or hydroxyl radicals (OH) are / is electrochemically generated on the surface in situ by accurately adjusting the electrode potential of the difunctional anode, so that instant generation and instant utilization of active oxygen are realized. The active oxygen directly enters a washing system of the washing machine along with water flow, bacteria, viruses and fungi can be efficiently inactivated under the normal-temperature or low-temperature washing condition without additionally adding chemical disinfectants, organic stains and peculiar smell molecules are synchronously degraded, and green, efficient and intelligent healthy washing is achieved.

The invention relates to the technical field of biomass energy conversion, in particular to a gradient catalytic biomass tar cracking reactor and a control method thereof.The gradient catalytic biomass tar cracking reactor comprises a multilevel component characterization module, a functional group reaction activity evaluation module, a multi-scale reaction network coupling module, an oxygen content gradient regulation module, a self-adaptive product directional regulation module and the like; the system is used for finely representing tar components, improving complicated composition understanding and processing capability, calculating a functional group reaction activity index, constructing a three-level reaction network, optimizing reaction path selectivity, and generating an oxygen content gradient index and a catalyst distribution scheme, so that gradient reduction of oxygen content and oriented conversion of products in a reactor are realized; the multi-section fixed bed reactor is designed, different catalysts are filled in each reaction area, the reaction requirements are met, the system intelligently regulates and controls reaction operation parameters, the biomass tar cracking efficiency and the product directionality are remarkably improved, and innovation and breakthrough are brought to the technical field of biomass energy conversion.

The present invention provides a vapor deposition device, comprising: a reaction chamber; a gas injection mechanism, located at the top of the reaction chamber; a susceptor, disposed the reaction chamber, a reaction zone being formed above the susceptor; a rotating shaft, connected to the susceptor; a shielding member, positioned in the reaction chamber and surrounding an inner wall of the reaction chamber, the shielding member comprising an isolation wall near the reaction zone, the isolation wall and the gas injection mechanism forming an enclosed spatial region that covers the reaction zone, a radial dimension of the spatial region gradually increasing from top to bottom, and an outer diameter of the lowest end of the shielding member matching an inner diameter of the reaction chamber; purge channels, distributed on the isolation wall, passing through the isolation wall and in communication with the spatial region, so as to allow a purge gas to be introduced into the spatial region. The vapor deposition device provided by the present invention can improve the production efficiency and quality of materials grown by the device, and extend the maintenance cycle of the reaction chamber.

The utility model provides a micro-fluidic chip and a micro-fluidic system, a micron-sized main channel is arranged in the micro-fluidic chip, and a sample to be detected is introduced into a generation area of the main channel to form a large number of micro-droplets. The micro-droplets serve as a reaction container to react with tyrosine and tyrosinase which are guided into the reaction area of the main channel, and finally absorbance testing can be conducted on the micro-droplets in the detection area of the main channel. The micro-droplets are small in volume, have high surface area to volume ratio, and can form a reaction container for efficient reaction. The microfluidic system can rapidly and accurately measure to-be-detected samples with different concentrations, and has the advantages of low reagent consumption, energy conservation, environmental protection, small required detection space, large-scale parallel operation and the like.

The invention relates to the field of polymerization reactions. A synthetic latex polymerization reaction temperature optimization control method comprises the steps that temperature detection data of a reaction kettle in synthetic latex polymerization reaction are obtained, and the temperature detection data comprise polymerization reaction area real-time distribution temperature, reaction kettle temperature distribution data and heat transfer medium flow data; obtaining a thermal stress index value according to the real-time distribution temperature of the polymerization reaction zone, and generating a reaction zone parameter compensation amount according to the thermal stress index value; and obtaining the uniformity index of the temperature field of the reaction kettle according to the temperature distribution data of the reaction kettle. Through real-time acquisition and coupling analysis of multi-source data such as temperature deviation of a polymerization reaction zone, uniformity of a temperature field in a kettle, flow fluctuation of a heat transfer medium and the like, a multi-dimensional coupling matrix of thermal stress, uniformity and flow fluctuation is constructed, and the limitation of traditional single-parameter control is broken through; and comprehensive evaluation of the reaction heat state, the stirring effect and the heat exchange stability is realized.

The invention provides a spatial ALD (atomic layer deposition) coating device, a coating method and a composite film. According to the spatial ALD coating device, a coating cavity comprises at least one group of reaction areas which are connected in sequence, and the adjacent reaction areas are isolated through air curtains; each group of reaction areas consists of a precursor reaction area and a co-reactant reaction area which are separated by an air curtain; the gas inlet assembly comprises a precursor source gas inlet piece, a co-reactant source gas inlet piece and a gas curtain supply piece; the precursor source gas inlet piece comprises a precursor source gas supply device and a precursor source gas transmission device; the co-reactant source gas inlet piece comprises a co-reactant source gas supply device and a co-reactant source gas transmission device; the air curtain supply part comprises an air curtain air supply device and an air curtain air conveying device; and the substrate to be coated is driven by the conveying mechanism to sequentially pass through each group of reaction areas. According to the spatial ALD coating device, the preparation of a composite film with any material ratio can be realized according to requirements, the production efficiency is improved, and the application range is widened.

The invention discloses an integrated autotrophic nitrogen removal treatment system with multiple operation modes, comprising: an A / O reactor, the A / O reactor comprising an anoxic zone and an aerobic zone; the ANAMMOX reactor is connected with the A / O reactor, and the ANAMMOX reactor comprises a first ANAMMOX reaction zone and a second ANAMMOX reaction zone; the MBR membrane separation device is connected with the ANAMMOX reactor, an MBR membrane assembly is arranged in the MBR membrane separation device, and the MBR membrane separation device is further connected with a water production unit and a sludge treatment unit; and the autotrophic nitrogen removal control unit is used for controlling the A / O reactor, the ANAMMOX reactor and the MBR membrane separation device. According to the invention, the water inlet proportion and the system operation parameters can be autonomously controlled and adjusted according to the change of the sewage quality, the whole / short-cut nitrification and denitrification coupled anaerobic ammonia oxidation reaction in different operation modes is realized, the removal of ammonia nitrogen and nitrate nitrogen is realized to the greatest extent, and the treatment targets of optimal treatment effect and lowest operation consumption are achieved.

The utility model relates to an internal structure of a vertical water purification device, which comprises a vertical cylinder, the vertical cylinder is of a flat bottom type structure, a cleaning pipe is arranged at the upper part in the vertical cylinder, an inclined plate is arranged below the cleaning pipe, a micro-vortex flocculation reaction zone is arranged below the inclined plate, and a micro-vortex flocculation reaction zone is arranged below the micro-vortex flocculation reaction zone. A micro-vortex flocculation reaction area is arranged in the vertical barrel, a negative pressure hydraulic ejector is arranged below the micro-vortex flocculation reaction area, an opening of the negative pressure hydraulic ejector faces upwards, the negative pressure hydraulic ejector is connected with a middle pipeline in the micro-vortex flocculation reaction area, a sludge discharge area I is arranged between the micro-vortex flocculation reaction area and the negative pressure hydraulic ejector, a sludge discharge area II is arranged at the bottom of the vertical barrel, and the sludge discharge area II is connected with the vertical barrel. And a negative pressure sludge return pipe is arranged at the lower part of the middle pipeline, and the lower end of the negative pressure sludge return pipe is arranged in the sludge discharge area II. The device is small in occupied area, simple in structure and good in treatment effect.

The invention discloses a multipurpose biological filter treatment device, which mainly comprises a water distribution tank, a water inlet pipe, a water outlet pipe, a return pipe, an aeration pipe, a filter material, a filter plate, a baffle plate, a membrane assembly, an overflow port and a tank body, and is characterized in that the baffle plate is arranged in the middle of the tank body to divide the tank body into a filler area and a reaction area; the filter plate is arranged at the bottom of the filler area, two layers of fillers are arranged on the upper layer of the filter plate, the lower layer of the filter plate is quartz sand with the particle size of 0.5-2mm, and the upper layer of the filter plate is an AFM active filter material; and the membrane component is arranged in the reaction area and adopts a silicon carbide flat membrane with the filtering precision of 0.1-2 microns. Aiming at the defects of an original sewage treatment device, the invention provides a sewage treatment filter device which is good in treatment effect and low in operation energy consumption, can be used for water pretreatment of a micro-polluted water source and can also be used for advanced treatment of sewage.

The application discloses a pollution-preventing detection device, method and application for rapid detection of nucleic acid amplification, which comprises a detection part and a mixed reaction cabin, and the mixed reaction cabin comprises a reaction cabin main body and a reaction cabin cover which is in sealed connection with the reaction cabin main body and can be detached; a channel for connecting a hybridization liquid containing part and a mixed reaction part is arranged between the reaction cabin cover and the reaction cabin main body; the detection part comprises a detection inner core and a detection box body containing the detection inner core; a transparent observation window is arranged on the detection box body and corresponds to the reaction area position of the detection inner core; a flow guide device matched with the mixed reaction cabin is further arranged on the detection box body; the flow guide device comprises a flow guide pipe and a flow guide part; one end of the flow guide part is connected with the flow guide pipe, and the other end is connected with the detection inner core; the hybridization liquid and the sample mixed liquid are guided to the detection inner core; and the detection inner core displays the final detection result in the area corresponding to the transparent observation window. The application realizes that the liquid in the reaction tube flows out to the designated detection card in a completely closed environment, and has the advantages of good sealing effect and prevention of primer aerosol pollution.

The invention relates to the technical field of reactors, and discloses a uniform gas-liquid distribution suspended bed reactor for heavy oil hydrogenation, which comprises a reactor shell, a gas-liquid distribution disc is horizontally arranged at the lower end of an inner cavity of the reactor shell, a Venturi annular gas-liquid diffuser is arranged on the gas-liquid distribution disc, and a pre-distribution chamber is formed at the bottom of the gas-liquid distribution disc; the Venturi annular gas-liquid diffuser comprises an outer gas guide pipe arranged on the gas-liquid distribution disc in a penetrating mode. According to the Venturi annular gas-liquid diffuser, through the synergistic effect of a liquid-phase flow annular nozzle and a gas-phase flow annular nozzle, a liquid phase sprayed out at a high speed is actively sheared and broken relative to a low-speed gas phase, and uniform small bubble groups can be generated, so that the gas-liquid contact area is greatly increased; the dissolution rate and the mass transfer efficiency of the hydrogen into the heavy oil are remarkably improved, so that the hydrogenation reaction depth and the product quality are directly improved, and meanwhile, the catalyst in a catalyst suspended bed reaction zone is effectively protected.

A flow field assembly for a fuel cell includes a flow field plate and a sealing member. A sealing member is disposed on the first side of the flow field plate and defines at least one bypass channel. The at least one bypass channel is configured to partially divert the reaction fluid from the inlet port of the flow field plate into a selected region of the reaction zone to cause the diverted portion of the reaction fluid to mix with the undiverted portion of the reaction fluid in the selected region such that the diverted portion of the reaction fluid is less than the undiverted portion of the reaction fluid in the selected region than in the absence of the at least one bypass channel. And the distribution uniformity of the reaction fluid on the reaction area is improved. The utility model also provides a fuel cell unit comprising the flow field assembly. According to the flow field assembly provided by the invention, the distribution uniformity of the current density can be improved by improving the distribution uniformity of the reaction fluid on the reaction region, so that reliable and efficient operation of the fuel cell unit is ensured.

The invention provides a PEALD cavity structure, and relates to the technical field of coating equipment. The structure comprises an outer cavity, an inner cavity, a lifting system, a heating platform deck, an air exhaust system and a pressure controller. The inner cavity is arranged in the outer cavity, an opening matched with the heating carrying table is formed in the bottom of the inner cavity, and the lifting system controls connection and separation of the heating carrying table and the inner cavity. And the inner cavity is internally provided with the separator to form a conical reaction space, so that plasma distribution is improved. And the annular exhaust hole uniformly exhausts redundant gas, so that the film thickness uniformity is improved. A pressure controller is arranged in the outer cavity to maintain fixed pressure difference between the inner cavity and the outer cavity and prevent diffusion of process gas. According to the design, the independence of the reaction area is realized, the utilization rate of the precursor is improved, the maintenance process is simplified, and the cleanliness of the cavity is enhanced.

Systems, methods, and devices using plasma to reform a hydrocarbon feedstock are described. A hydrocarbon feedstock is introduced to a first reaction zone having a first plasma, where the first plasma increases the excitation of the hydrocarbon, which could be up to 100% of the dissociation level. The excited hydrocarbons are then introduced to a glide arc plasma, which raises the excitation levels of the hydrocarbons past the dissociation level. Microwave energy is introduced to the glide arc plasma to propagate the hybrid plasma and maintain dissociation of the hydrocarbons, allowing for filtration of particulate and capture of hydrogen and carbon. Inductive coupling to the hybrid plasma may be further used to monitor reaction conditions in the hybrid plasma and maintain desired excitation of the hydrocarbons.

The invention belongs to the technical field of carbon nanotube purification, and provides a carbon nanotube purification method. The method comprises the following steps: placing unpurified carbon nanotube raw powder in a fixed bed Joule thermal reactor; introducing weak oxidizing gas, heating to enable the temperature of the reaction zone to reach 100-400 DEG C, generating first Joule heat at the carbon nanotube raw powder, and removing an impurity carbon layer coating the surfaces of the metal catalyst particles; heating to enable the temperature of the reaction zone to reach 200-700 DEG C, generating second Joule heat at the carbon nanotube raw powder, and removing impurity carbon on the surface of the carbon nanotube; and mixing the treated carbon nanotube raw powder with acid, and removing the metal catalyst particles. According to the present invention, the weak oxidation gas is adopted as the reaction gas, the electric field is introduced under the external low temperature condition to perform the stepped purification, and the Joule heat is selectively generated on the different types of the impurity carbon and the metal catalyst micro-region so as to achieve the effect of selectively removing the multiple types of the impurity carbon under the mild condition.

The invention discloses a composite MABR treatment device for sewage with low carbon-nitrogen ratio, which comprises a reaction tank, a plurality of membrane modules positioned in the reaction tank, an aeration system, a cleaning system and a sewage pipeline system, n guide plates are arranged in the reaction tank, and the guide plates are arranged at equal intervals and divide the reaction tank into n + 1 reaction areas, the membrane assembly comprises membrane frames located on the two sides of the membrane assembly and hollow fiber membrane filaments located in the middles of the membrane frames. A unique sewage treatment flow direction is formed, the treatment area of unit membrane filaments is increased, the requirement of the system for oxygen can be met through a small membrane area, the treatment effect is greatly improved, only micro-aeration is adopted, the aeration pressure of the air inlet end is smaller than 10 kPa, physical damage caused by high pressure of a membrane assembly does not need to be worried about, and the treatment cost is reduced. A large amount of aeration cost and maintenance cost are saved, meanwhile, a carbon source does not need to be added in the denitrification process, and a large amount of carbon source adding cost is saved.

The invention relates to the technical field of pure ammonia combustors, in particular to a catalytic auxiliary cracking plasma pure ammonia combustor and an operation method thereof. According to the technical scheme, the device comprises catalytic cracking areas, a purification area, a pre-combustion area, a main combustion area, an ammonia supply area and a waste heat system, the catalytic cracking areas are arranged on the two sides of a combustor and comprise an ammonia gas inlet channel and a catalytic reaction area internally provided with a porous medium, and a catalyst fixedly grows on the surface of the porous medium; the purification area is located outside the combustor and connected with an outlet of the catalytic cracking area through a pipeline, and selective separation membranes are arranged at the outlet end and the exhaust end of the purification area respectively; the pre-combustion areas are distributed on the two sides of the main combustion area, comprise air inlet channels and plasma igniters and communicate with an outlet of the purification area. According to the invention, the problems of ignition, stable combustion and low NOx emission of the ammonia fuel are solved, the unification of efficient energy utilization and industrial applicability is realized, and a key technical support is provided for large-scale application of the ammonia alternative fuel in an industrial kiln.

System and methods for plasma treatment of a fluidized bed of particles are disclosed. The systems include an energy coupling zone configured to generate a plasma from microwave radiation and an interface element configured to propagate the plasma from the energy coupling zone to a reaction zone. The reaction zone is configured to receive the plasma, receive a plurality of reactant particles in a fluidization plane direction from a fluidization assembly positioned below the reaction zone, and form a product in presence of the plasma. The fluidization plane is substantially perpendicular to the propagated plasma.

The invention discloses a bipolar plate and a fuel cell stack, the bipolar plate comprises a cooling plate and two polar plates stacked on two sides of the cooling plate, the cooling plate comprises a cooling flow channel, each polar plate comprises a flow field, the flow field comprises a reaction zone and two distribution zones located on two sides of the reaction zone, and the reaction area on at least one polar plate penetrates through the polar plate along the arrangement direction of the cooling plate and the polar plate. The reaction areas of the bipolar plate penetrate through the corresponding polar plates, the depth of the reaction areas is increased, a more stereoscopic three-dimensional air channel structure is formed, and the air channel structure has more flowing space in the depth direction, so that fluid in the reaction areas can flow in the extending direction and the depth direction of the reaction areas at the same time; and the flowing fluency of fluid in the reaction area is improved.

The invention discloses test paper and a kit for detecting urea in body fluid, and the test paper comprises a base layer which comprises a near end and a far end transversely extending from the near end; the sampling area is arranged at the far end of the base layer and is used for absorbing body fluid to be detected; the reaction area is arranged on the base layer and is used for absorbing the body fluid in the sampling area so as to react by utilizing urease in the reaction area; the diffusion area is arranged on the base layer, is connected with the reaction area and is used for performing lateral chromatography on reactants generated in the reaction area from the far end to the near end; the color development area is arranged on the base layer, is isolated from the reaction area through the diffusion area and is used for absorbing reactants subjected to lateral chromatography by the diffusion area so as to carry out color development reaction by utilizing color development substances in the color development area, so that a detection result of the urea in the body fluid is displayed.

A fully modularized mid-feed pyrolysis reactor includes modularized upper, middle, and lower vessels. The middle vessel is equipped with at least two feeding units. Discharge pipes of the feeding units are placed into the core feeding and reaction zone of the reactor. The discharge outlets of the discharge pipes are equipped with heat-insulating valves that can automatically close under gravity. The lower vessel integrates an integrated grate, which can be rotatably arranged inside the lower vessel. The top of the integrated grate is equipped with a rotatable distributor including a support tray and a material distribution tower with a pointed top structure positioned at the center of the support tray. The bracket formed by water-cooling pipes on the distributor can act as an agitator. Under the premise of achieving precise control, this invention solves the technical problems of single feedstock and small reactor capacity in existing bottom-feed vertical pyrolysis reactors.