11results about How to "Avoid backmixing" patented technology

The utility model discloses a system for continuously producing methylated melamino-formaldehyde resin, which comprises a raw material storage tank A and a raw material storage tank B. The raw material storage tank A is connected with a micro-channel reactor A. A discharge port of the micro-channel reactor A is connected with a precooling pipe. A discharge port of the pre-cooling pipe and a discharge port of the raw material storage tank B are respectively connected with the micro-channel reactor B, and a discharge port of the micro-channel reactor B is connected with the receiving storage tank. According to the utility model, the reaction is continuously carried out in the micro-channel reactor, the raw material can be a high-solid-content raw material, the energy consumption and the raw material consumption are low, the quality difference of products among batches is small, and the production cost is reduced.

The utility model relates to the technical field of flow dividers, in particular to a cyclone separator for cleaning tail gas in anhydrous aluminum trichloride production, which comprises a cyclone separator body, a gas outlet pipe is arranged on the top surface of the cyclone separator body, and a gas inlet pipe is arranged at the upper part of the cyclone separator body; a dust collecting mechanism is arranged at the bottom of the cyclone separator body and comprises a collecting shell, a separating assembly and a dust collecting box, the top of the collecting shell is fixedly connected with a discharging port of the cyclone separator body, the bottom of the collecting shell is fixedly connected with the top face of the separating assembly, and the bottom face of the separating assembly is in butt joint with a box opening of the dust collecting box. The separation assembly is used for separating dust in the dust collection box from the cyclone separator body, dynamic sealing is achieved through the separation assembly, gas leakage and dust backmixing are avoided, the separation efficiency is improved, a detachable fixing structure of the dust collection box and the separation assembly supports rapid replacement, shutdown is not needed, and production continuity is guaranteed.

The utility model discloses a magnetic coupling stirring rotary-cut tubular reactor feeding from the top, which comprises outer magnetic steel rotating under the driving of a motor, an inner magnetic steel stirring shaft is arranged in the outer magnetic steel, the inner magnetic steel stirring shaft synchronously rotates under the magnetic action of the outer magnetic steel, an outer magnetic sleeve is wrapped outside the outer magnetic steel, and the outer magnetic sleeve is sleeved outside the outer magnetic steel. A front flange sleeve is arranged outside the inner magnetic steel stirring shaft, and the inner magnetic steel stirring shaft is connected with the dynamic tube reaction cavity through a flange, so that the inner magnetic steel stirring shaft rotates in the closed compression cavity. Compared with traditional mechanical stirring, the top-feeding magnetic coupling stirring rotary-cut tubular reactor has the advantages that mechanical sealing is avoided, so that the risk of cross contamination caused by leakage of lubricating oil is avoided; no mechanical seal, magnetic coupling stirring and rotary-cut tubular reactor flange connection are adopted, so that the reactor can resist high temperature, high pressure, corrosion and other harsh environments.

The present invention provides an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the isononyl alcohol hydroformylation reactor comprises: a housing, the lower part of the housing is provided with a reactant inlet, and the side wall of the upper part of the housing is provided with a reactant outlet; the diffusion device is arranged in the shell and is positioned above the reactant inlet; the distribution device is arranged in the shell and is positioned above the diffusion device; the heat exchange distribution structure is arranged in the shell and located above the distribution device, the heat exchange distribution structure comprises a plurality of heat exchange pipes and at least one distribution plate, the axes of the heat exchange pipes are parallel to one another, the heat exchange pipes are annularly distributed along a plurality of concentric virtual circumferences, the distribution plate is provided with a plurality of positioning through holes and a distribution structure, and the positioning through holes are communicated with the distribution structure. The plurality of heat exchange tubes are respectively arranged in the plurality of positioning through holes in a penetrating manner; the isononyl alcohol hydroformylation reactor solves the problems of non-uniform distribution of gas and liquid reactants, serious back-mixing phenomenon in the reaction process and low reaction conversion rate of the isononyl alcohol hydroformylation reactor in the prior art.

The invention discloses a preparation method of a pyrazole intermediate, which comprises the following steps: respectively introducing a glycerol aqueous solution and a concentrated sulfuric acid solution containing a catalyst into a microchannel reactor for reaction to obtain the pyrazole intermediate, and the pyrazole intermediate comprises 3-hydroxypropionaldehyde and acrolein. According to the preparation method of the pyrazole intermediate, based on the efficient heat exchange performance of the microchannel reactor, the reaction time can be obviously shortened, and adverse phenomena such as back-mixing, carbonization and violent heat release in the reaction process can be prevented, so that the yield of the pyrazole intermediate is increased, and the production efficiency of the pyrazole intermediate is greatly improved.

The application relates to the technical field of hydrogen production, and discloses a modular water electrolysis hydrogen production device based on wind and light power generation, which comprises a base, a stand column arranged on one side of the top of the base, an electrolysis box arranged on the other side of the top of the base, two gas storage tanks arranged in a symmetrical manner on the electrolysis box, connecting hoses arranged on the gas storage tank inlets, and two bend pipes arranged in a symmetrical manner on the electrolysis box. The modular water electrolysis hydrogen production device based on wind and light power generation converts electric energy through a fan-driven generator, and converts electric energy through the photovoltaic effect of a photovoltaic panel, and the two are complementary. The excess electric energy can be stored in a storage battery, so that the power supply interruption problem caused by single energy dependence is avoided. Compared with a traditional hydrogen production device relying on a power grid or single new energy, the design can maximize the use of renewable energy, reduce the consumption of fossil energy, reduce carbon emissions, improve the energy utilization efficiency of the hydrogen production process and the environmental friendliness, and adapt to the development trend of new energy hydrogen production.

The utility model provides an ethylbenzene oxidation reaction system. The system comprises a reactor, a plurality of partition plates are sequentially arranged in the reactor from top to bottom, and the multiple partition plates sequentially divide the reactor into at least three reaction areas from top to bottom; the uppermost reaction zone in the reactor is connected with a liquid inlet pipeline, and the side wall of the lowermost reaction zone in the reactor is provided with a product outlet; an airlift pipeline is vertically arranged on the upper surface of the partition plate; an overflow weir is arranged between every two adjacent reaction areas, the top of the overflow weir is lower than the liquid level of the upper reaction area, and the bottom of the overflow weir is a first preset distance away from the bottom of the lower reaction area; an enhanced mass transfer unit is arranged in each reaction zone, a gas inlet of the enhanced mass transfer unit is connected with a gas inlet pipeline for inputting a gas-phase raw material, and the gas-phase raw material enters the reaction zone after being treated by the enhanced mass transfer unit so as to enhance the mass transfer effect between the gas-phase raw material and the liquid-phase raw material. According to the scheme, the reaction efficiency of ethylbenzene peroxidation reaction can be improved.

The present invention discloses a decentralized low-carbon sewage treatment device and method based on anaerobic ammonia oxidation, the device includes a sewage inlet tank for receiving external raw water, which can transport the raw water to a UASB reactor and a continuous flow reactor respectively in proportion; the UASB reactor is used to convert organic matter in the raw water into methane; a suspended anaerobic ammonia oxidation bacteria filler is added in the continuous flow reactor, and raw water denitrification is achieved through short-range nitrification / anaerobic ammonia oxidation and short-range denitrification / anaerobic ammonia oxidation, and the hydraulic retention time in the anoxic zone is extended to achieve synchronous in-situ fermentation of sludge, and a check gate is set to solve the problem of sludge back mixing; the secondary sedimentation tank precipitates the raw water after denitrification, and returns part of the sludge to the continuous flow reactor. The present invention does not need to add additional carbon sources, effectively solves the problem of back mixing in the reaction zone, realizes the resource utilization of decentralized sewage organic matter and sludge reduction generated in highway service areas, etc., and has the characteristics of high denitrification efficiency, stable performance and effective reduction of carbon emissions.

The utility model discloses a kind of primary liquid purification slag discharge devices, it is related to primary liquid purification technical field, including support frame, the side of the support frame is equipped with outer shell, the bottom of the outer shell is equipped with slag discharge cylinder, in the utility model, with the rotary motion of adjusting plate, high-pressure water flow is sprayed from connecting pipe, the inside of slag discharge cylinder and outer shell can be washed, simultaneously drive motor works and drives connecting rod rotation, cleaning is carried out to the sediment adhered in the inside of slag discharge cylinder by scraper movement, sediment adhered in equipment inner wall, pipeline and slag discharge port etc. part is washed away quickly by the way of cooperation of high-pressure water washing and mechanical scraping, so that sediment is discharged smoothly with water flow, improve the slagging efficiency.

The application discloses a reaction device and method for alkaline oxidation continuous step-by-step extraction of lignin, and relates to the technical field of high-efficiency utilization of biomass. Different lignin products in different extraction stages are collected respectively, and serious secondary degradation reaction of the lignin products is avoided. The reaction device comprises an oxidizing alkali solution preparation system, an oxidation extraction system and a product collection system. The oxidizing alkali solution preparation system comprises a high-pressure gas cylinder, a heatable pressure-resistant container, a heatable magnetic stirrer and a gas supply pressure regulating system. The oxidation extraction system comprises a rapid heating box, a heat radiation preheater arranged in the rapid heating box and a flow-through reaction tube. The product collection system comprises an equilocal pump and a sample collection bottle. In the application, the biomass lignin can be continuously extracted and collected in different alkaline oxidation solvents, different time gradients and different temperature gradients, and the secondary reaction of the extracted lignin in the reaction system is significantly weakened.

The invention relates to the technical field of production of epoxypropane by a hydrogen peroxide method, in particular to an epoxypropane reaction device which comprises a cylinder, a funnel and a downcomer, and the downcomer can be opened and closed; the reaction tube is wound around the cylinder, the tube diameter of the reaction tube is gradually increased from bottom to top, the upper end of the reaction tube is connected with the funnel, and the downcomer is connected with the reaction tube. The hydrogen peroxide reaction device has the following beneficial effects that through good temperature control, the utilization rate of hydrogen peroxide is increased, the service life of a catalyst is prolonged, potential safety hazards are reduced, and the production cost is reduced.