2164 results about "Reaction zone" patented technology

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 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.

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 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 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.

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.

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.

A method is provided for synthesizing bio-based LPG from renewable sources via a bio-based synthetic gas feedstock, in a dual-stage reaction system comprising an oxygenate synthesis reaction zone and an oxygenate conversion reaction zone that are configured for producing and converting a methanol intermediate for reduced CO2 selectivity. The method includes recovering LPG from either the full reaction zone effluent or from a purge stream separated from the full reaction zone effluent for LPG recovery.

The invention relates to a fluidized bed reaction system for a silicon-carbon negative electrode material. The silicon-carbon negative electrode material fluidized bed reaction system comprises a drying tank, a fluidized bed reactor and a discharge tank, the drying tank is provided with a material cavity, and the drying tank can dry materials in the material cavity and can also convey replacement gas into the material cavity to replace gas in the material cavity; the fluidized bed reactor is internally provided with a gas-solid separation area, a reaction area and an initial fluidization area which are sequentially arranged from top to bottom, and the reaction area is communicated with the material cavity so as to receive the dried materials; the discharge tank is provided with a dust removal cavity, the dust removal cavity is communicated with the gas-solid separation area through a discharge pipeline, the discharge pipeline is provided with a blasting assembly, and when the pressure in the fluidized bed reactor exceeds a first preset value, the blasting assembly can be broken to release gas in the fluidized bed reactor; meanwhile, powder in the fluidized bed reactor can be discharged into the washing liquid in the dust removal cavity through the discharge pipeline.

The utility model discloses a device for treating wastewater containing hexavalent chromium ions, which comprises an anode reaction zone, a cathode reaction zone, a buffer zone, an electrocoagulation reaction zone and an inclined tube settling zone which are communicated in sequence, a suspended partition plate is arranged between the anode reaction zone and the cathode reaction zone, a graphite plate array is arranged in the anode reaction zone, and the graphite plate array is arranged in the inclined tube settling zone. A porous carbon material is arranged in the cathode reaction zone, the cathode reaction zone is communicated with the buffer zone, the buffer zone is communicated with the electrocoagulation reaction zone, an iron pole plate array is suspended in the electrocoagulation reaction zone, the electrocoagulation reaction zone is communicated with the inclined tube settling zone, and the inclined tube settling zone is communicated with the inclined tube settling zone. And an inclined tube is suspended in the inclined tube settling region. According to the utility model, hexavalent chromium ions in water can be removed by only using electricity and a small amount of iron element, reducing agent chemicals and acid and alkali agents used for treating hexavalent chromium in the traditional process are greatly reduced, and the salt content of effluent is far lower than that of the traditional treatment process.

The invention relates to the technical field of fracturing flow-back fluid treatment, and discloses a fracturing flow-back fluid discharge treatment process and device.The fracturing flow-back fluid discharge treatment process comprises a pretreatment unit, a membrane concentration reduction unit and a deep treatment unit, and the pretreatment unit comprises an oxidation gel breaking reaction zone, an air flotation treatment zone and a magnetic coagulation reaction system; comprising the following steps: S1, the fracturing flow-back fluid firstly enters a regulating tank and then enters an oxidation gel breaking reaction zone; s2, entering the air flotation treatment area; s3, the wastewater firstly enters the hardness removal reaction tank and enters the coagulating sedimentation area for reaction, and the precipitated sludge enters the magnetic powder recovery subunit; s4, water discharged from the pretreatment system enters a membrane concentration decrement unit; s5, the membrane concentrated solution enters a BDD electrooxidation system, organic matter in water is oxidized through a BDD electrode, BDD effluent enters an MVR evaporation system to be evaporated, and MVR evaporation mother liquor enters a mother liquor drying system. According to the invention, the treatment efficiency of the fracturing flow-back fluid can be improved on the whole.

A method is provided for synthesizing bio-based LPG from renewable sources via a bio-based synthetic gas feedstock, in a dual-stage reaction system comprising an oxygenate synthesis reaction zone and an oxygenate conversion reaction zone that are configured for producing and converting a methanol intermediate for reduced CO2 selectivity. The method includes recovering LPG from either the full reaction zone effluent or from a purge stream separated from the full reaction zone effluent for LPG recovery.

The invention discloses an explosive production wastewater pretreatment device and relates to the technical field of wastewater treatment.The explosive production wastewater pretreatment device comprises a flotation tank and a control device, a partition plate is arranged in the flotation tank and divides the interior of the flotation tank into a reaction area and a flotation area, a partition block is arranged in the flotation tank, and the partition block and the inner surface of the side, away from the partition plate, of the flotation tank form a slag receiving area; the conveying mechanism is used for conveying wastewater and additives to the reaction area; the exhaust mechanism is used for discharging small bubbles into the flotation area; the scum scraping mechanism is used for discharging floating scum floating from the flotation area to the scum receiving area; and the cleaning mechanism is used for cleaning the scum attached to the scum scraping mechanism. Through the arrangement of the cleaning mechanism, after the scum scraping mechanism scrapes scum of the flotation area to the scum receiving area, the cleaning plate in the cleaning mechanism can automatically clean scum attached to the surface of the scum scraping soft plate in the scum scraping mechanism, and the scum attached to the surface of the scum scraping soft plate is prevented from entering the flotation area again; and the wastewater treatment effect of the device is improved.

The invention relates to the technical field of superfine molybdenum powder preparation, in particular to a preparation device and method for low-oxygen superfine molybdenum powder. The specific preparation device comprises a sublimation bin, a reaction area and a gas-solid separation bin which are sequentially connected, the reaction zone comprises a preheating zone, a reduction zone and a conversion zone; a part of the hydrogen pipeline and a part of the carbon monoxide pipeline are arranged in the preheating area; one end of the hydrogen pipeline extends to the reduction area and is used for providing preheated hydrogen and carrying out gas-phase reduction reaction on the preheated hydrogen and the gas-phase MoO3 subjected to heat preservation; one end of the carbon monoxide pipeline extends to the conversion area and is used for providing preheated carbon monoxide and reacting with water vapor to complete primary water vapor conversion; meanwhile, partial carbon monoxide is subjected to a disproportionation reaction to generate micro carbon powder, and the micro carbon powder and water vapor are subjected to a water gas reaction to complete secondary water vapor conversion. The problem that the oxygen content of existing superfine molybdenum powder prepared through gas-phase molybdenum trioxide reduction is too high is solved.

The invention provides an SNCR (selective non-catalytic reduction) intelligent denitration system based on a sound sensing technology, and relates to the technical field of flue gas denitration. The hearth temperature calculation module sequentially sounds and receives the multiple sound wave signal flows, multiple hearth path temperatures are obtained through calculation and uploaded to the central processing unit through the temperature field reconstruction module, and a hearth combustion temperature field graph is generated through calculation; the denitration strategy control module is used for matching and analyzing a denitration strategy according to the hearth combustion temperature field graph and determining target denitration control strategy parameters; and the feedback optimization module adopts the parameters to execute denitration control operation, and regulates and updates target denitration control strategy parameters according to the denitration effect. The technical problem that SNCR denitration control is difficult to accurately match with the optimal reaction zone due to low temperature measurement means precision and insufficient spatial resolution in the prior art is solved, the SNCR denitration efficiency is improved, and ammonia escape is reduced.

The utility model discloses a culture device for strengthening granulation of phycomycete sludge, and belongs to the field of wastewater treatment. The reactor is divided into a jet water inlet area, a circulation reaction area and a mud-water separation area which are communicated with one another from bottom to top. The jet water inlet area is provided with a jet pipe, a sludge collecting tank and a sludge outlet, and the sludge-water separation area is provided with a three-phase separator, an overflow weir, a water outlet pipe, an exhaust pipe, a water quality detection device and the like. And an inner-layer guide cylinder and an outer-layer guide cylinder with zigzag corrugated structures are arranged in the circulation reaction area. The circulation reaction area is divided into a circulation ascending area, an inner-layer circulation descending area and an outer-layer circulation descending area which are different in sectional area from inside to outside, light sources for promoting algae growth are arranged in the inner-layer circulation descending area and the outer-layer circulation descending area, and the intensity of the light source in the outer-layer circulation descending area is larger than that of the inner-layer circulation descending area. According to the device, the granulation process of sludge with different particle sizes can be intensified in a quality-divided manner, and rapid and efficient granulation culture of phycomycete sludge is realized.

The invention relates to the technical field of carbon black production, in particular to high-volume resistance carbon black production equipment. The furnace comprises a furnace body, the furnace body is divided into three areas from top to bottom, and the furnace body comprises a preheating area, a reaction area and a homogenizing area from top to bottom; a coil pipe is arranged in the preheating area, the end part of the coil pipe is fixedly connected with a furnace wall lining, the furnace wall lining is positioned in the reaction area, the bottom of the furnace wall lining is fixedly connected with a furnace chamber, and the furnace chamber is positioned in the homogenizing area; a plurality of rotational flow assemblies are arranged in the furnace wall lining, a uniform distribution plate is arranged in the furnace cavity, a gap is reserved between the furnace cavity and the homogenizing area, and a water cooling device is arranged in the gap between the furnace cavity and the homogenizing area. Through a three-area modular structure, accurate regulation and control of the preheating temperature of raw materials are realized, a uniform and stable material basis is provided for a reaction area, and the problem of insufficient preheating of a traditional single cavity structure is solved.

The present application discloses a clarifier and a water purifier, and belongs to the technical field of sewage treatment. The clarifier and the water purifier are provided. The lower end of the clarifier is closed. A throat pipe is arranged in the clarifier from the center of the bottom of the clarifier. A first reaction chamber is arranged in the upper part of the throat pipe. An annular second reaction chamber is arranged around the first reaction chamber. The first reaction chamber is connected to the second reaction chamber from the top. The second reaction chamber is connected to a separation chamber from the bottom. A sludge discharge pipe is arranged on the side of the bottom of the separation chamber. The top of the separation chamber is connected to a water outlet weir. The sewage added with a medicament enters a cyclone reaction area of the water purifier, and then flows into the clarifier through a primary flocculation reaction and a preliminary suspended clarification area to perform a first-stage and a second-stage flocculation reaction, so that the clarity of the clean water obtained after the sewage treatment is improved. The problem that the existing water purifier can only perform a first-stage flocculation reaction on the sewage and the sewage treatment effect is poor is solved.

The invention discloses a tubular reactor and a high-temperature chlorination treatment device.The tubular reactor comprises a rotatable first tube body, a gas supply assembly, a material supply assembly and a heating assembly, the feeding end of the first tube body is higher than the discharging end, and the first tube body is provided with at least two reaction areas; each reaction area extends from the feeding end of the first pipe body to the discharging end of the first pipe body; the gas supply assembly is configured to supply chlorinated gas to each reaction area; the feeding assembly is configured to provide quartz sand raw materials for each reaction area; the heating assembly is configured to heat all the reaction areas; when the first pipe body rotates, the quartz sand raw materials in each reaction area roll in the respective reaction area, so that the quartz sand raw materials in each reaction area are in full contact with the chlorinated gas. The tube reactor can greatly increase the use volume of the tube body and improve the purification efficiency; and moreover, the mixing uniformity of the quartz sand raw material and the chlorinated gas can be improved, and the dosage of the chlorinated gas is greatly reduced.

The invention discloses an intelligent operation decision-making method, system and device for a flash furnace and a medium, and the method comprises the steps: obtaining the smelting process data of the flash furnace, the manual observation information of the smelting process and the inspection and test data of a smelted product, and building a global database to carry out the unified management of the data; a fire observation opening area of the flash furnace, the interior of a flue gas pipeline and the furnace wall of a slag tap are monitored, and furnace condition sensing information is obtained; regulating and controlling loop setting of a reaction zone of the flash furnace according to the smelting process data, the manual observation information, the inspection and test data, the furnace condition sensing information and the first target index; and according to the smelting process data, the manual observation information and the second target index, electrode rising and falling of an electrode area of the flash furnace and the gear of the transformer are regulated and controlled. According to the embodiment of the invention, the working condition of the smelting process of the flash furnace can be monitored and analyzed, and the operation decision is intelligently executed according to the monitoring result. The method can be widely applied to the field of flash furnace smelting.

Systems and processes for cracking hydrocarbons to produce light olefins include an FCC reactor utilizing counter-current flow that includes a reaction zone comprising an elongated reaction tube that has a feed inlet, a product outlet, and a catalyst inlet. In embodiments, the FCC reactor further includes a freeboard zone. The freeboard zone is configured to reduce a superficial velocity of the cracked hydrocarbon fluids in the reaction zone, causing catalyst entrained in the cracked hydrocarbon fluids to at least partially separate from the cracked hydrocarbon fluids. In embodiments, the FCC reactor includes a dense fluidized bed unit. The dense fluidized bed unit is configured to inject a fluidizing gas such that bubbles are formed within the solid particles of the dense fluidized bed of solid particles, which causes the catalyst to overflow from the dense fluidized bed of solid particles into the reaction zone.

The invention discloses an online pre-column derivatization coupled liquid chromatography-mass spectrometry amino acid detection method, and relates to the technical field of analysis and detection, and the method comprises the following steps: obtaining a to-be-detected sample, and carrying out protein hydrolysis treatment to obtain hydrolysate; mixing the hydrolysate with a derivatization reagent, carrying out on-line derivatization reaction through multiple sections of reaction zones which are connected in series, and maintaining different pH environments in the reaction zones; an online detection unit is arranged at an outlet of the reaction zone to monitor the concentration of derivative products and adjust reaction conditions in real time; performing chromatographic separation on the derivative reaction liquid; switching an ion source ionization polarity mode according to an elution time window to carry out mass spectrometry detection; and substituting the mass spectrum response signal into the standard curve to calculate the amino acid concentration value. The method realizes automatic derivation and high-sensitivity detection of amino acid, and has the advantages of simplicity and convenience in operation, controllable reaction conditions and high detection efficiency.

The invention discloses an immersed rotating packed bed combined coil device and method for reactive extraction, and the combined coil device comprises a shell, a liquid inlet, a sealing assembly, a liquid premixing pipe, a packing assembly, a heat exchange jacket, a liquid emptying port, a liquid outlet and a spiral coil assembly; according to the device, a reactor cavity is completely filled with liquid, so that an immersed reaction environment is formed; and a strong shearing effect is generated by utilizing the supergravity silk screen filler, so that rapid heterogeneous mixing is realized, and the reaction selectivity is improved. Meanwhile, a supergravity reaction area and a coil flow area are combined into a whole, the spiral coil can repeatedly change the flow direction and form vortex to realize continuous flow of the material and maintain the dispersion state of liquid drops, and the retention time of the material is flexibly regulated and controlled by adjusting the length of the coil, so that the reaction conversion rate is remarkably improved.