173 results about "Gas liquid reaction" patented technology

The invention provides a method for realizing direct mineralization of carbon dioxide in air by using natural ore. The method comprises the following steps: S1, crushing and activating natural ore to obtain an activated ore raw material; s2, the activated ore raw materials are fed into a mineralization reaction system, and air is introduced into the mineralization reaction system for a mineralization reaction; wherein the mineralization reaction system is carried out by adopting a gas-liquid reactor or a gas-solid reactor. According to the method, the mineralization reaction activity of the natural minerals in the mineralization reaction system can be enhanced, so that the problems of relatively low reaction speed and the like caused by relatively low concentration of carbon dioxide in the direct mineralization process of air are solved, and the mineralization reaction speed of the natural minerals reaches 10-100g CO2 / m < 2 >. H; the air carbon dioxide fixing amount in unit time and unit reactor sectional area can be obviously increased.

The invention belongs to the technical field of gas pollutant treatment, and particularly relates to filler for a gas-liquid reactor and application of the filler. The filler comprises a high-wettability corrosion-resistant polymer layer and a corrugated partition plate layer used for providing a channel for gas. The polymer layers and the corrugated partition plate layers in the filler are arranged at intervals, and the two polymer layers are arranged on the two sides of each corrugated partition plate layer in an attached mode respectively; the filler provided by the invention is formed by coupling the high-wettability polymer layer and the corrugated partition plate layer, the high wettability of the polymer layer can ensure that liquid is uniformly distributed on the polymer layer, and a layer of uniform water film is formed, so that the reaction efficiency of reaction gas and the liquid is improved, and a product after the reaction can be taken out by the liquid on the water film in time; the air resistance is reduced and the reaction efficiency is improved.

The present invention provides a synthesis system and a synthesis method for lithium hexafluorophosphate. The synthesis system comprises a gas-liquid reaction kettle and a built-in microbubble generation unit provided in the gas-liquid reaction kettle; a material inlet and a gas inlet are formed in the side wall of the gas-liquid reaction kettle; the built-in microbubble generation unit comprises a first microbubble generator and a second microbubble generator, the first microbubble generator is provided below the liquid level in the gas-liquid reaction kettle and connected to the material inlet, and the second microbubble generator is provided at the bottom end of the gas-liquid reaction kettle and connected to the gas inlet; a plurality of layers of perforated plates are successively provided in the gas-liquid reaction kettle from top to bottom; through holes of said perforated plates are staggered, and said perforated plates are provided between the first microbubble generator and the second microbubble generator. The synthesis system of the present invention increases the area of mass transfer between lithium fluoride liquid and phosphorus pentafluoride gas, increases the reaction rate, and reduces energy consumption.

The invention relates to a silicon imine production method adopting a continuous method. The method comprises the following steps: by taking liquid ammonia as a liquid medium, turbulence the liquid ammonia from top to bottom along the inner wall of the falling-film tubular reactor; spraying silicon tetrachloride in a mist form to form gaseous silicon tetrachloride; carrying out gas-liquid reaction on the gaseous silicon tetrachloride and liquid ammonia to obtain a silicon imine solid reaction product; in the aging device, gaseous silicon tetrachloride which is not completely reacted continuously reacts with liquid ammonia; the filter is used for filtering a silicon imine solid reaction product; the separator is used for separating ammonia gas and ammonium chloride. In this way, waste discharge is reduced through continuous production. Then, in combination with a deep learning algorithm, an implicit change mode of real-time pressure data in the reactor can be mined, consumption of reactants and accumulation of products in the reactor can be learned and understood from the implicit change mode, and intelligent spraying of gaseous silicon tetrachloride is realized based on the condition.

The invention discloses a gas-liquid reaction system. The gas-liquid reaction system comprises a wastewater pool, an ozone generator, an oxidation reaction tank and a first micro-interface generator located in the oxidation reaction tank. An inlet of the first micro-interface generator is communicated with the wastewater pool and the ozone generator, and an outlet of the first micro-interface generator is communicated with the inside of the oxidation reaction tank. Therefore, wastewater in the wastewater pool and ozone produced by the ozone generator can be simultaneously conveyed to the first micro-interface generator, the wastewater and the ozone oppositely run in the first micro-interface generator to crush and disperse the ozone into micron-sized ozone micro-bubbles, and the mass transfer area between the ozone micro-bubbles and the wastewater in the oxidation reaction tank can be increased by the ozone micro-bubbles; the oxidation reaction between the ozone and the wastewater is promoted, so that the utilization rate of the ozone is improved. As the oxidation reaction tank is communicated with the wastewater pool, unreacted ozone in the oxidation reaction tank can be conveyed into the wastewater pool to oxidize wastewater, so that the unreacted ozone is fully utilized, and zero emission of ozone is realized.

The invention provides a continuous production method of chloromethyl ethyl ether, and relates to the field of chloromethyl ethyl ether. The continuous production method of the chloromethyl ethyl ether comprises the following steps: depolymerization, first-stage gas-liquid reaction, second-stage microchannel reaction and third-stage pipeline reaction. The continuous production method of chloromethyl ethyl ether effectively avoids the defects of low hydrogen chloride throughput, long reaction time and low production efficiency in the batch-type reaction process, and overcomes the problems of low mass transfer efficiency, low reaction speed and high production energy consumption of heterogeneous reaction of paraformaldehyde, ethanol and hydrogen chloride gas; and on the basis of realizing continuous production of the chloromethyl ethyl ether, the purity and the yield of the continuously prepared chloromethyl ethyl ether are further improved.

The invention relates to the technical field of cable combustion test equipment, in particular to a cable combustion test integrated flue gas purification treatment system and method.The cable combustion test integrated flue gas purification treatment system comprises a shell, a purification cavity used for treating flue gas is formed in the shell, and a flue gas inlet and a flue gas outlet which are communicated with the purification cavity are formed in the outer portion of the shell; the washing liquid supplying and spraying device is used for continuously supplying and spraying washing liquid into the purification chamber according to a preset spraying path; and the gas-liquid contact retention device is arranged in the purification chamber, is positioned at the downstream of the spraying path and is used for intercepting and gathering the washing liquid. According to the invention, the gas-liquid contact retention device is arranged to intercept and gather the washing liquid to form a dynamic liquid seal, so that flue gas is forced to pass through the retention area, the gas-liquid reaction time is greatly prolonged, and efficient and deep purification of acid gas and soluble pollutants is realized; and finally, the remarkable technical effects of improving the purification efficiency and ensuring that the discharged gas is environmentally friendly and reaches the standard are achieved.

The invention relates to the technical field of waste gas treatment, and discloses a waste gas recovery tower which comprises a tower body, a gas inlet pipe arranged on the side wall of the bottom, a gas outlet pipe arranged on the top, manholes uniformly distributed in the side wall and sealed through flanges; the gas-liquid reaction section comprises an aeration assembly immersed below the liquid level of the liquid storage tank and a rotary spraying assembly located above the liquid level, the aeration assembly and the rotary spraying assembly are in reverse rotation linkage through a planetary gear transmission mechanism, and the rotary spraying assembly is driven by a driving assembly; through the reverse flow field design of upward spraying of the gas spraying ring and downward spraying of the liquid spraying ring and in combination with a two-way rotating mechanism driven by a planetary gear transmission mechanism, the liquid spraying ring and the gas spraying ring continuously and reversely rotate to generate dynamic shearing force, and gas and liquid phases form a continuously updated contact interface in an annular turbulence gap; the pollutant absorption efficiency is obviously enhanced, and the mass transfer bottleneck of a traditional spray tower is broken through.

The invention belongs to the technical field of chemical engineering and fine fluorine chemical synthesis, and particularly relates to a preparation method of sulfuryl fluoride chloride. According to the preparation method, through the synergistic effect of a gas-liquid reaction system and a closed-loop circulation system, a tertiary amine hydrofluoric acid adduct (such as Et3N.nHF, n = 2-6) is used as a fluorinating reagent, sulfuryl fluoride chloride is generated through a rapid cross-flow reaction in excessive sulfuryl chloride (SO2Cl2) under the conditions that the temperature is 65-100 DEG C and the pressure is 0.5-2.0 MPa, and a liquid-phase byproduct tertiary amine hydrochloride hydrogen fluoride adduct (such as Et3N.HCl. (n-1) HF) is used for preparing the sulfuryl fluoride chloride. Supplementing hydrogen fluoride to regenerate the catalyst and recycling; and after a gas-phase product is pressurized, rectified and purified by a light component removal tower and a heavy component removal tower, totally returning a light component (Cl2 / SO2) and a heavy component (SO2Cl2) to a synthesis system for recycling. According to the method, the reaction temperature, the reaction pressure, the liquid phase dispersion degree and the contact time are accurately controlled, so that the reaction product generates SO2FCl with high selectivity, and the byproduct (R3N.HCl. (n-1) HF) is kept in a liquid phase, so that the reaction can be continuously carried out, and conditions are created for subsequent treatment.

The invention discloses a carbon dioxide absorbent and an absorption and regeneration method thereof. The absorbent comprises the following components in parts by weight: 15-40 parts of tertiary amine, 15-70 parts of polyamine, 1-20 parts of sterically hindered amine, 1-20 parts of an activating agent and 1-5 parts of amino-containing organic acid. The carbon dioxide absorbent provided by the invention has the characteristics of low desorption energy consumption, rapid separation and rapid regeneration, and the regeneration process is simple and easy to popularize. The efficient gas-liquid mass transfer equipment is used for achieving the heat and mass coordinated transfer process in the gas-liquid reaction and separation process, the mass transfer coefficient of carbon dioxide molecules on a solvent / water vapor interface is increased, the carbon dioxide separation efficiency is indirectly improved, and the characteristic that the liquid film carbon dioxide molecule concentration is high at the regeneration temperature of a low-energy-consumption solvent is coupled. The quantity of solvent entrained by the carbon dioxide generated by the invention is less, and the loss of the solvent in the cooling separation process is effectively reduced.

The invention relates to the technical field of gas-liquid reaction devices, in particular to a double-shaft stirring single-flow-channel horizontal device for solid catalyst catalytic gas-liquid reaction, a reaction body is divided into an upper flow cavity and a lower flow cavity by a partition plate, the upper flow cavity and the lower flow cavity are communicated, a plurality of air inlet pipes are arranged in the lower flow cavity, and a plurality of exhaust pipes are arranged at the top of the upper flow cavity. The structural design that the first stirring assembly pushes materials rightwards and the second stirring assembly pushes materials leftwards is combined, continuous feeding reaction is achieved, the flowing path is prolonged after reaction liquid enters the reaction body, the reaction liquid can make full contact with gas for reaction, and the quality of reaction products is improved; air can be exhausted in time, so that the air blocking phenomenon is avoided, and the feeding difficulty is reduced; a filter plate structure is arranged close to the right end in the reaction body, so that catalyst particles are effectively prevented from being discharged along with products, and the catalyst use efficiency is improved.

A nitrogen concentration prediction method according to the present invention predicts the nitrogen concentration in molten steel during a vacuum degassing treatment. The method comprises a prediction step for calculating a predicted value of the nitrogen concentration in molten steel using a nitrogen concentration prediction model which is a physical model in which a gas-liquid reaction interfacial area for a nitrogen absorption reaction and a denitrification reaction is used as an input variable and the predicted value of the nitrogen concentration in molten steel S is used as an output variable. The prediction step includes an estimation step for estimating the gas-liquid reaction interfacial area by estimating at least one of a bubble reaction interfacial area, a molten steel bath surface area in the vacuum tank, and the amount of change in the gas-liquid reaction interfacial area due to generation of air bubbles from the molten steel, using a calculation formula in which vacuum degassing treatment conditions are used as variables.

The invention relates to a multicomponent VOCs multiphase advanced oxidation and efficient absorption purification device and a purification method thereof, and belongs to the technical field of waste gas treatment.The multicomponent VOCs multiphase advanced oxidation and efficient absorption purification device comprises a supporting base, an oxidation tower and an adsorption tower are fixedly connected to the top of the supporting base, and a gas-liquid mixing structure capable of improving the gas-liquid reaction efficiency is arranged in the oxidation tower; the gas-liquid mixing structure comprises a tower plate fixedly connected to the interior of the oxidation tower, and a gas rising pipe is fixedly connected to the upper surface of the tower plate. According to the multi-component VOCs complex-phase advanced oxidation and efficient absorption purification device and the purification method thereof, physical and chemical reactions in five forms of gas-liquid, liquid-liquid, gas-gas, aerial fog and gas-solid are continuously generated in the device through a bubble cap tower plate, a rotational flow plate and a top gas injection pipeline which are arranged in the oxidation tower as well as a non-metal filler plate and an atomization nozzle which are arranged in the adsorption tower; the multi-mechanism and complex-phase synergistic purification path ensures that VOCs and malodorous gases with different properties can be efficiently degraded and removed.

The application discloses a method for regulating solidification structure of aluminum-silicon-iron alloy by gas-phase synergistic double-melt blending. CH4 gas is introduced into high-temperature aluminum-titanium alloy liquid, C-containing active particles are decomposed from the CH4 gas in the alloy melt and gas-liquid reaction occurs between the C-containing active particles and Al and Ti particles to generate intermediate phases such as Al4C3 and Ti3AlC and unstable TiC particles, and the intermediate phases react to generate thermodynamically stable TiC nanoparticles. Meanwhile, aluminum-silicon alloy melt and aluminum-iron alloy melt with significant difference in volume and temperature are blended in a controlled diffusion manner to obtain aluminum-silicon-iron melt. During the gas-liquid blending process, due to the opposite directions of solid / liquid interface advancing direction and solute diffusion direction during melt solidification, there exist non-local micro temperature and concentration fluctuations, and grain refinement is realized by controlling the solidification nucleation and diffusion growth process. The gas-liquid casting technology is a new process with multiple processes in synergistic action, and multiple processes can have a superposition effect under synergistic action, so that the synergistic refinement of aluminum-silicon-iron alloy second phase and aluminum grains is realized.

The application discloses a mass transfer enhanced gas-liquid reactor, which is characterized in that a feeding inlet and a tail gas outlet are arranged on a reactor shell, and a discharging outlet is arranged at the bottom; a stirring device comprises at least one group of stirring paddles arranged in the reactor shell; a gas distribution device is fixedly connected in the reactor shell and comprises an outer cover with an upper opening and a lower opening and a gas distributor sleeved in the outer cover, a gas-liquid passage with an annular cross section is formed between the outer cover and the gas distributor, a longitudinal section of the gas-liquid passage is S-shaped, a gas distribution hole is arranged on the side, and a gas inlet pipe is communicated with the gas distribution hole. The mass transfer enhanced gas-liquid reactor has the advantages of promoting the dissolution and transmission of gas, greatly improving the gas atom economy, saving energy, uniform stirring, complete fermentation, fast reaction speed and the like.

The invention provides a gas-liquid reaction system and a gas-liquid reaction method, aiming at the gas-liquid reaction system, continuous reaction of a liquid-phase raw material and a gas-phase raw material is realized through a plurality of groups of gas-liquid reactors and gas-liquid separators, complete reaction of liquid-phase raw materials is achieved through the first gas-liquid reactor, recovery of excessive gas-phase raw materials and collection of liquid-phase products generated by the first gas-liquid reactor are achieved through the first gas-liquid separator, complete reaction of the excessive gas-phase raw materials is achieved through the second gas-liquid reactor, and recovery of excessive liquid-phase raw materials is achieved through the second gas-liquid separator. The third gas-liquid reactor realizes complete reaction of excessive liquid-phase raw materials, and the first gas-liquid separator also realizes collection of liquid-phase products generated by the second gas-liquid reactor and the third gas-liquid reactor, that is, in the continuous reaction process, on one hand, full reaction of the gas-phase raw materials and the liquid-phase raw materials is realized, so that the product quality is ensured, and the production cost is reduced; on the other hand, the maximum utilization of the liquid-phase raw material and the gas-phase raw material is realized, so that the production cost is saved.

The utility model relates to the field of chemical production technology discloses a kind of gas-liquid reaction equipment with micro-bubble preparation function.The gas-liquid reaction equipment with micro-bubble preparation function includes reaction piece and ultrasonic emission component, and reaction piece is provided with reaction cavity;Ultrasonic emission component is arranged in reaction cavity, including multiple ultrasonic transducers and several ultrasonic energy absorbers, multiple ultrasonic transducers are spaced apart along vertical direction, ultrasonic energy absorber is arranged between any adjacent two ultrasonic transducers, serpentine reaction channel is formed between multiple ultrasonic transducers, liquid and gas can pass through serpentine reaction channel, ultrasonic transducer is configured to emit ultrasonic wave, and ultrasonic energy absorber is configured to absorb reflected ultrasonic wave.The gas-liquid reaction equipment with micro-bubble preparation function can avoid the occurrence of ultrasonic interference effect, the generation of standing wave field and the appearance of multi-path reflection phenomenon, reduce the loss of ultrasonic energy, and ensure the efficiency of gas-liquid reaction.

The present invention relates to a gas introduction unit for introducing a process gas into a liquid present in a reactor without bubbles, the gas introduction unit comprising: a first gas-receiving chamber and a second gas-receiving chamber spaced apart therefrom, the two gas-receiving chambers being connected to one another via at least two two-dimensional gas-conducting diffusion membranes made of hollow fibers spaced apart from one another and at least a portion of which are fixed to one another; a gas supply receptacle provided in at least one of the gas receiving chambers; a receptacle for the shaft provided in at least one of the gas receiving chambers; The gas introduction unit for introducing gas into the liquid in the reactor can supply process gas via a gas supply receiver and can be set in rotational motion via a shaft receptacle, and convection can be created in the reactor via the rotational motion of the gas introduction unit in the liquid.

The invention discloses a spraying type gaseous efficient deoxidizing device and method for lead-based liquid metal. The device and method are applied to gaseous efficient deoxidizing of the lead-based liquid metal. Comprising an inlet connecting pipe, an inlet cavity, a reaction cylinder, an exhaust cylinder, a jet pipe column and a nozzle, the upper end of the reaction cylinder is provided with a top plate, the lower end of the reaction cylinder is provided with a bottom plate, and the bottom of the reaction cylinder is provided with an inlet cavity; a jet pipe column is arranged in the reaction cylinder, the bottom end of the jet pipe column is welded to the bottom plate, the bottom of the jet pipe column is communicated with the inlet cavity, lead-based liquid metal flowing in from the inlet connecting pipe is divided in the inlet cavity and then enters the jet pipe column, and nozzles in the circumferential direction are arranged at the top of the jet pipe column. And the lead-based liquid metal sprayed from the nozzle can enter the reaction cylinder or the exhaust cylinder. The multiple jet flow pipe columns are arranged in the reaction cylinder, lead-based liquid metal is sprayed out from the nozzles after being accelerated in the jet flow pipe columns, and the gas-liquid reaction area is increased; an air inlet pipe is arranged beside the jet pipe column, and the initial turbulent flow and mixing effect is enhanced.

The utility model relates to the technical field of preparation of dichloropropanol from glycerol, in particular to a production system for producing dichloropropanol through glycerol chlorination. The device comprises an adipaldehyde mixing tank for mixing adipaldehyde and pure water, a gas-liquid reaction kettle for absorbing chlorine in crude hydrogen chloride, a first microporous filter for filtering out a catalyst, a cooler for cooling crystals and a second microporous filter for removing crystals. The method has the effects of improving the problem of side reaction caused by chlorine impurities in crude hydrogen chloride and increasing the conversion rate of glycerol.

The utility model discloses an efficient gas-liquid reaction device which comprises a reaction shell and a gas inlet pipe, the gas inlet pipe is arranged on one side of the reaction shell, a liquid guide pipe is arranged at the top end of the reaction shell, a clamping sleeve is arranged at one end of the liquid guide pipe in a sleeved mode, a clamping strip is arranged on one side of the clamping sleeve, and a first buffer disc is arranged at one end of the clamping strip. A second buffer disc fixedly sleeves one end part of the reaction shell, a plurality of fixing rods are arranged at the top end of the second buffer disc, a plurality of lifting rods are arranged at the bottom end of the first buffer disc, and a clamping sleeve, the first buffer disc, a convex rod, a power switch and a buzzer are arranged, so that liquid and filler are conveyed from the position of a liquid guide pipe; along with the increase of the amount of impurities attached to the inner surface of the liquid guide pipe, the protruding rod can extrude the power switch in the moving process to drive the buzzer electrically connected with the protruding rod to work, the buzzer makes loud buzzing sound, and a worker can be reminded to clean the impurities attached to the inner surface of the liquid guide pipe in time.

The application discloses a self-energy-supply piezoelectric ceramic atomization device and relates to the technical field of gas-liquid reaction equipment.The self-energy-supply piezoelectric ceramic atomization device comprises a reaction kettle and a self-energy-supply piezoelectric ceramic atomizer.The self-energy-supply piezoelectric ceramic atomizer comprises a shell, a piezoelectric atomization module and a fluctuation power generation module.The piezoelectric atomization module comprises a liquid storage tank, a liquid inlet pipe and a piezoelectric ceramic atomization sheet.The fluctuation power generation module comprises a fluctuation pressure sensor, a cantilever pipe arranged on the fluctuation pressure sensor and metal balls arranged in the cantilever pipe.When liquid fluctuation impact in the reaction kettle drives the self-energy-supply piezoelectric ceramic atomizer, the kinetic energy of the liquid drives the metal balls in the cantilever pipe to reciprocate and fluctuate, the pressure is transmitted to the fluctuation pressure sensor to generate mechanical energy, the piezoelectric atomization module is triggered to form electric energy for driving, energy self-supply and high-efficiency energy saving are realized;after the piezoelectric atomization module is electrified, the liquid is atomized into micron-level fine droplets, and the contact area of the gas-liquid two phases is increased.

The utility model relates to the field of gas-liquid mixing, in particular to a gas-liquid nano-reactor, which solves the problem of low reaction efficiency of substances with slower gas-liquid reaction, utilizes a mixing cavity to generate a cavitation effect so as to enable gas and liquid to reach nanoscale, increases the gas-liquid contact area and increases the reaction efficiency, and mainly comprises a columnar reactor body, the reactor body is provided with a plurality of mixing cavities which are sequentially communicated along the axis direction; the mixing cavity is sequentially divided into a converging section and a diffusing section in the flow direction of fluid, the converging section is a first conical cavity with the inner diameter gradually reduced in the flow direction of the fluid, and a plurality of vortex-shaped flow guide grooves converging towards the center are formed in the inner wall of the converging section; the diffusion section is a second conical cavity with the inner diameter gradually enlarged in the flow direction of the fluid, and the second conical cavity is communicated with the first conical cavity.

The present invention provides a gas-liquid phase vinyl chloride production device and process, which belongs to the technical field of vinyl chloride production, including a reaction tower, a liquid distributor, a gas distributor, a demister, a liquid catalyst circulation mechanism, and a condenser; the reaction tower is provided with a gas-liquid reaction zone, a liquid catalyst inlet, and a liquid catalyst outlet, a mixed gas inlet at the bottom, and a reaction gas outlet at the top; the liquid distributor is arranged in the reaction tower; the gas distributor is arranged in the reaction tower; the demister is used to recover the liquid catalyst droplets entrained in the reaction gas; the liquid catalyst circulation mechanism is arranged outside the reaction tower; and the condenser is arranged outside the reaction tower, which is used to collect the reaction gas and cool it down. It is intended to solve the technical problems in the prior art that gas-solid phase reactions are often accompanied by serious temperature runaway and surface carbon accumulation, which easily cause catalyst deactivation, and there are many side reactions, and the product impurity content is high, which puts pressure on the fine manufacturing of subsequent products.

The utility model provides a gas-liquid reaction assembly and a gas-liquid reaction device. The gas-liquid reaction assembly comprises a bottom plate, at least one protruding structure extending to the opposite side from one side of the bottom plate is formed on the bottom plate, and a plurality of first through holes are formed in the protruding structure; the cover plate is arranged above the protruding structure in a covering mode, the cover plate and the protruding structure are spaced, air passing gaps are formed between the side edges, located on the two sides of the protruding structure, of the cover plate and the bottom plate, and the highest position of the air passing gaps is lower than the lowest position of the first through holes. Therefore, the liquid can submerge the gas passing gap, so that the gas and the liquid generate a gas explosion phenomenon at the gas passing gap, and the gas and the liquid react more fully.

The present invention relates to a gas / liquid reactor for the oligomerization of gaseous ethylene comprising a central conduit delimiting within the reactor enclosure a central zone allowing downward flow and an external zone allowing upward flow, thus making it possible to increase the travel time of the gas bubbles injected in the liquid phase, without increasing the volume of the liquid phase and therefore the volume of the reactor.

A gas-liquid reactor for recycling and reusing a chemical catalyst comprises a reactor body with a gas inlet formed in the lower end, a premixing and stirring mechanism and a catalyst adding and mixing mechanism are arranged at the top of the reactor body, and the premixing and stirring mechanism comprises a magnetic stirring rotor, a magnet, a motor and a hollow premixing shell. The magnetic stirring rotor is located in the hollow interior of the premixing shell, and a stirring shaft is arranged on the magnetic stirring rotor; the catalyst adding and mixing mechanism comprises a vacuum pump, a catalyst storage tank and a flow meter; a catalyst adding opening is formed in the top of the reactor body. Two liquid raw materials are injected into the premixing shell, and are fully stirred and premixed through the stirring shaft, so that the reaction strength of liquid-liquid phase reaction between the two liquid raw materials is enhanced, full gas-liquid reaction between the two liquid raw materials and gas in the reactor body is facilitated, and the production efficiency is improved; and by arranging the catalyst recovery box, the catalyst solid is retained in the catalyst recovery box due to the shielding of the filter screen, so that the catalyst solid is conveniently recovered and reused.

The invention relates to a multi-section type gas-liquid parallel flow upward bubble tower reactor, aims to solve the problems of flooding and too short retention time of liquid phase reactants caused by gas-liquid countercurrent contact, and can be suitable for slow gas-liquid reaction easy to foam. A two-layer barrel structure is adopted, wherein an outer barrel is a liquid channel and is provided with a plurality of downcomers; the inner cylinder is a bubbling reactor and is used for gas-liquid reaction. In order to improve the reaction efficiency and prevent liquid phase backmixing, the whole tower body is divided into a plurality of sections, and the adjacent sections are separated by partition plates. And liquid overflowing from the upper-section inner cylinder flows into the lower section through the downcomer, and then flows into the space of the inner cylinder through the side wall of the bottom of the inner cylinder arranged at the lower section to carry out bubbling reaction. And gas passes through the outer cylinder from the outside of the outer cylinder through a plurality of parallel pipelines and is introduced into each section of reactor from the side wall of the bottom of the inner cylinder. The invention provides a method for connecting all sections of bubble towers in the same tower body in series, the problems of liquid phase back-mixing and fluid foaming are effectively solved by utilizing the method, the liquid phase can obtain high conversion rate, and the operation can be carried out under a wide gas / liquid flow rate ratio range.

The utility model discloses a kind of double-pipe reactors for ammoniation compound fertilizer production, including acid liquid pipe, ammonia pipe, baffle, reaction tube, fixed rod, guide vane, ammonia separator, distributor, liquid inlet, gas inlet and cooling water system.Spiral guide vane is set to extend the retention and reaction time of acid liquid in reaction tube;Through the fine distribution of ammonia gas of mesh hole ammonia separator, the contact area of ammonia gas and acid liquid is increased, the contact path and time of ammonia gas and acid liquid are extended, so that ammonia gas and acid liquid are uniformly and fully reacted in reaction tube.The application solves the problem of low gas-liquid reaction uniformity and mixing efficiency, and controls the reaction temperature through the cooling water system to avoid local overheating leading to nutrient decomposition.

The present application relates to the technical fields of organic chemical synthesis, and discloses a method for synthesizing pyromellitic acid. The method comprises the following steps: (1) under gas-liquid reaction conditions, contacting liquid-phase materials containing durene, a solvent and a catalyst with an oxygen-containing gas in a micro-channel reactor to perform first oxidation, so as to obtain first oxidation materials, wherein the conditions of the first oxidation are such that the conversion rate of the durene reaches more than 99%, and the total molar amount of a monocarboxyl product, a dicarboxyl product and an intermediate product of the oxidation of the monocarboxyl product to the dicarboxyl product in the first oxidation materials is more than 85% of the molar amount of the first oxidation materials; and (2) sending the first oxidation materials into a reaction kettle to perform second oxidation. The method for synthesizing pyromellitic acid provided by the present application has the advantages of high yield, good selectivity, low possibility of blockage of the micro-channel reactor, high oxidation efficiency, safe reaction, economy and environmental protection.