44results about How to "Continuous process" patented technology

The invention discloses a refining device and method for a polymerization product and application. The refining device comprises an aldehyde removal tower, a dehydration tower, a water separation tank, a light component removal tower, a byproduct tower and a product tower. According to the present invention, the reaction product obtained through the ethylene glycol dehydration condensation reaction contains water, acetaldehyde, diethylene glycol, 1, 4-dioxane, 2-methyldioxocyclopentane and other components, and has characteristics of complex components and coexistence of multiple azeotropic pairs, and the invention provides the sequential rectification method by introducing the azeotropic breaking component according to the composition, therefore, a diethylene glycol product with high purity and byproducts of acetaldehyde and 1, 4-dioxane are separated, the process is continuous and easy to operate, and the method has industrial feasibility.

The invention discloses a method for recovering and liquefying carbon dioxide in natural gas, and relates to the technical field of natural gas processing. According to the device, the working table, the multi-stage absorption mechanism, the self-regeneration type alternate adsorption mechanism and the linkage part are matched to complete recovery and liquefaction of carbon dioxide in natural gas, and the linkage part is in transmission connection between the self-regeneration type alternate adsorption mechanism and the stirring and foaming integrated unit. Multiple reactions of hydrogen sulfide in natural gas are achieved, the removal effect is improved, the service life of an adsorption material is prolonged through the design of step-by-step saturation replacement of a sodium bicarbonate solution, the frequent replacement requirement is reduced, the solution can be dynamically replaced, and the continuity of the treatment process is kept. Through up-down alternate operation of the molecular sieves, water vapor adsorption and synchronous regeneration are realized, molecular sieve saturation is avoided, continuous and efficient natural gas treatment is ensured, and the overall treatment effect is improved.

The invention discloses a refining device and method for a nitrogen-containing solvent precursor and application. The refining method comprises the following steps: by taking an acetamide-containing intermediate product of acetonitrile prepared by ammoniation and dehydration of methyl acetate through a two-step method as a separation raw material, obtaining an acetamide main product, an acetonitrile byproduct and a recycled unreacted raw material through the steps of raw material recovery, azeotropic breaking refining and three-waste separation, and dissolving trace impurity noncondensable gas through self-produced wastewater, and pollution gas is prevented from being discharged. The refining method provided by the invention is environment-friendly and suitable for industrial large-scale continuous operation.

The invention discloses a refining device of a nitrogen-containing solvent precursor and a refining method and application thereof. The refining method comprises the following steps: by taking a liquid-phase material obtained after cryogenic separation of a gas-phase mixture obtained by ammoniation reaction as a raw material, carrying out segregation side-stream rectification, component coarse separation, three-waste separation and differential pressure separation to obtain an acetonitrile main product, an acetamide byproduct and recycled unreacted raw materials; and trace impurity non-condensable gas is dissolved at low temperature through self-produced wastewater, so that pollution gas is prevented from being discharged. The method can be used for separating and refining the liquid-phase reaction product of acetonitrile prepared by ammoniating methyl acetate, and is simple in process, environment-friendly, easy to operate and suitable for industrial large-scale continuous production.

The invention provides a water-based metal roof rust conversion coating and a preparation method thereof, and the water-based metal roof rust conversion coating comprises the following components by weight: 10-40 parts of deionized water; 3-10 parts of antirust pigment and filler; 1-5 parts of a rust conversion agent; 0.5-2 parts of a penetrant; 50 to 70 parts of epoxy modified styrene-acrylic emulsion; 0.5 to 2.6 parts of a first auxiliary agent; and 3.6 to 10.5 parts of a second auxiliary agent. The rust conversion agent and the penetrating agent are introduced into the water-based metal roof rust conversion coating provided by the invention, and the epoxy modified styrene-acrylic emulsion is selected as a main raw material, so that the rust conversion coating not only has excellent comprehensive properties (such as excellent adhesion, weather resistance, salt spray resistance and the like), but also has excellent rust conversion and rust prevention effects.

A device and method for continuous fluorination of perfluoropolyether end groups, belonging to the technical field of fluorine chemical industry. In the device, an ultraviolet mercury lamp (9) is placed in a cold trap (8), the cold trap (8) is placed in a liquid storage tank (6), the volute mixer (3) is connected to a tubular reactor (7), the tubular reactor (7) is spirally wound around the cold trap (8), and the liquid storage tank (6) is filled with pure water. The method steps are as follows: pure water is introduced into the liquid storage tank (6), and the ultraviolet mercury lamp (9) is turned on; a mixed gas of perfluoropolyether with unsaturated groups and fluorine gas is introduced into the volute mixer (3); under the ultraviolet irradiation condition of the ultraviolet mercury lamp (9), the material fully mixed by the volute mixer (3) enters the tubular reactor (7) for fluorination end-capping reaction. The present invention improves the yield and production efficiency of saturated perfluoropolyether, reduces energy consumption, has a simple process, and is suitable for industrial large-scale production.

The invention relates to a method for preparing metallic titanium through two-step electrolysis in halide molten salt, and belongs to the technical field of metallurgy. The method comprises the following steps: by taking fluorine-chloride mixed molten salt as primary electrolytic molten salt, adding TiO2 into the fluorine-chloride mixed molten salt, uniformly mixing, heating the fluorine-chloride mixed molten salt containing TiO2 to the electrolytic temperature of 650-850 DEG C in an inert atmosphere, inserting a cathode and an anode, carrying out primary molten salt electrolysis, taking out a cathode product, and carrying out secondary electrolytic treatment on the cathode product to obtain the TiO2 / TiO2 composite material. Performing vacuum distillation or washing on the cathode product to remove impurities, and drying to remove attached electrolyte to obtain a primary electrolytic product crude titanium; the method comprises the following steps: by taking primary electrolysis product crude titanium as a soluble anode, high-purity metal titanium as a cathode and chloride molten salt as secondary electrolysis molten salt, heating the chloride molten salt to the electrolysis temperature of 550-750 DEG C in an inert atmosphere, inserting the cathode and the anode, performing electrolytic refining, and washing the electrolysis product with diluted hydrochloric acid and deionized water to remove impurities, thereby obtaining the low-oxygen metal titanium powder. A low-melting-point molten salt system is adopted in two-step electrolysis, and energy consumption can be effectively reduced.

The invention relates to a method for industrially and continuously producing 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol, and belongs to the technical field of organic synthesis. The method for industrially and continuously producing 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol comprises the following steps: A, mixing isobutyric acid, a chlorinating agent and a solvent, and carrying out continuous chlorination reaction to obtain isobutyryl chloride; b, mixing the isobutyryl chloride with a dechlorinating agent and a solvent to carry out dehydrochlorination reaction and dimerization reaction to obtain 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanedione; c.2, 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanedione is subjected to continuous hydrogenation reduction, and 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol is obtained through preparation of 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol; the continuous chlorination reaction in the step A is sequentially controlled to be 30-40 DEG C, stays for 0.5-2 hours, is controlled to be 50-65 DEG C and stays for 0.5-2 hours, and is controlled to be 80-100 DEG C and stays for 1-3 hours. The method provided by the invention realizes industrial large-scale continuous production of 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol.

The weighing and bagging system comprises a control device, and further comprises a rack, a weighing device and a weighing device, the fast and slow feeding device is mounted above the rack; the quantitative weighing device is arranged under the fast and slow feeding device, and the quantitative weighing device is located in the machine frame. The bag fixing devices are symmetrically arranged on the two sides of the quantitative weighing device; the fast and slow feeding device comprises a feeding hopper, a material blocking device and a material uniformizing device. The automatic feeding device is safe, reliable and high in stability, the problems that a material conveyor is frequently started and stopped, the production process is discontinuous, the production link is lengthy, the occupied labor is large, and the working efficiency is extremely low can be solved, and the problem that the feeding precision is uncontrollable due to the fact that material conveying equipment is high in conveying speed can also be solved; and meanwhile, the problem of bagging scattering caused by blanking deviation and eccentric accumulation of materials can be solved, and the weighing and packaging requirements of tobacco stems in a tobacco processing threshing and redrying production line are met.

The invention discloses a process method for selective deep desulfurization and denitrification of aromatic-rich fractions. The process method comprises the following steps: (1) mixing aromatic-rich diesel oil with hydrogen, and then feeding the mixture into a pre-hydrogenation reaction zone I for pre-hydrogenation dealkene reaction; (2) a product obtained in the step (1) enters a hydrofining reaction zone II for a hydrofining desulfurization and denitrification reaction; (3) carrying out flash evaporation on the product obtained in the step (2) to separate recycle hydrogen, enabling the obtained refined diesel oil to enter a moving bed adsorption denitrification reaction zone III, and carrying out deep adsorption denitrification reaction on the refined diesel oil under the action of an adsorption denitrification agent to obtain a desulfurized and denitrified refined aromatic-rich diesel oil component; and (4) enabling the inactivated adsorption denitrification agent in the step (3) to enter an adsorbent regeneration area IV, and completing reduction and drying of the inactivated adsorption denitrification agent under the action of a desorption agent to obtain the cyclically regenerated adsorption denitrification agent. According to the process method, deep removal of the sulfur-containing nitrogen-containing compound can be realized, and the investment cost is also greatly reduced.

The invention provides a preparation method of an aluminum-based lithium extraction adsorbent, the aluminum-based lithium extraction adsorbent and application of the aluminum-based lithium extraction adsorbent, and particularly relates to the technical field of lithium ion sieves. The preparation method of the aluminum-based lithium extraction adsorbent comprises the following steps: A, uniformly mixing a lithium compound, an aluminum compound, a pore-foaming agent and a dispersing agent, adding a solvent, dispersing and grinding to obtain slurry; b, the slurry is subjected to first drying and then placed in a tubular furnace, water vapor is introduced for roasting, and precursor powder is obtained; and C, mixing the precursor powder with granulation glue, extruding into strips, drying for the second time, and crushing to obtain the aluminum-based lithium extraction adsorbent. The preparation method is continuous in process and mild in condition, high-efficiency conversion of the raw materials can be realized without a complicated process, excessive loss of the raw materials and generation of pollutants are avoided, the operation difficulty and cost are greatly reduced, and industrial large-scale production is facilitated.

The invention relates to an environment-friendly high-toughness high-low-temperature-resistant corrosion-resistant polyamide elastomer as well as preparation and application thereof, and belongs to the field of polymer synthesis. The invention provides a polyamide elastomer. The structural formula of the polyamide elastomer is as shown in formula I in the specification. The environment-friendly, high-toughness, high-temperature-resistant and corrosion-resistant elastomer with a new structure is prepared, and due to introduction of biphenyl and naphthalene ring structures, the resin is endowed with excellent heat and corrosion resistance and outstanding rigid and flexible mechanical properties (the tensile strength reaches about 80 MPa, and the elongation at break can reach 900%). # imgabs0 #

The invention relates to the field of PBO fabric surface modification, and provides a continuous surface modification method for a PBO fabric. According to the method, construction of a gallic acid (GA) polyphenol layer is promoted through normal-pressure low-temperature plasma, and a taurine hydrophilic group is introduced for surface modification of the PBO fabric. The method comprises the following steps: firstly, cleaning and drying a PBO fabric, then carrying out on-line activation on the fabric by utilizing plasmas, and immersing the fabric into a GA system within 0-30 seconds after plasma treatment, so that a polyphenol layer is formed on the surface of the fabric by GA; and finally, immersing the fabric into a taurine solution, so that taurine is fixed on the surface of the polyphenol layer through a quinone-amine reaction and a Michael addition reaction, and washing, drying and curing to obtain the modified PBO fabric. The process can be continuous, the wettability of the PBO fabric can be remarkably improved, the interfacial compatibility with a resin material is enhanced, and the shear strength of the composite material is improved.

The invention provides a silicon-based composite material and a preparation method thereof, and particularly relates to the technical field of secondary batteries. The silicon-based composite material comprises a carbon-containing substrate and silicon-containing particles, the carbon-containing substrate comprises a porous carbon substrate or a porous carbon substrate doped with a first doping element M; the silicon-containing particles comprise nanometer silicon particles and SiOx particles, and 0 lt; x < = 2; or the silicon-containing particles comprise nanometer silicon particles and nanometer silicon particles with at least partial surface oxidation; the silicon-containing particles are dispersed in pores of the porous carbon substrate; and at least part of the carbon-containing substrate and the silicon-containing particles form at least one bonding of C-Si, C-O-Si, C-M-Si, C-O-M-Si, C-O-M-O-Si and C-M-O-Si.

The present invention provides a clutch plate skeleton gluing system, and relates to the technical field of clutch plate skeleton processing equipment. A clutch plate skeleton gluing system comprises a clutch plate skeleton gluing machine, a cooling conveyor belt and a material receiving mechanism. The clutch plate skeleton gluing machine comprises a frame, an upper roller and a lower roller. The upper roller and the lower roller are rotatably installed on the frame respectively, and the upper roller is located directly above the lower roller. A gap is provided between the upper roller and the lower roller, and a gel layer is attached to the surface of the upper roller; the cooling conveyor belt is arranged at the rear end of the clutch plate skeleton gluing machine, and a plurality of cooling devices are sequentially arranged along the extension direction of the cooling conveyor belt; the material receiving mechanism is arranged at the rear end of the cooling conveyor belt, and the material receiving mechanism comprises a base and a material receiving rod, the base is installed on the working platform, and the material receiving rod is vertically arranged at the upper end of the base to pass through the inner hole of the clutch plate skeleton for receiving the material. The present invention has high gluing efficiency and high gluing quality. After the gluing is completed, it is cooled for a period of time, and it is transported and stored during cooling, which is efficient and fast.

The invention relates to the technical field of intelligent load adjustment of buoyancy body barging, in particular to an intelligent load adjustment method and system of buoyancy body barging. An intelligent load adjusting method for buoyancy body barging comprises the steps that a barging operation scheme of a buoyancy body is automatically calculated according to the calculated length, the calculated step length d, the operation time, the operation duration and buoyancy body information, then the zero step to the Nth step are automatically and gradually executed according to the barging operation scheme, and ballast water of a barging barge is correspondingly adjusted according to each step of the barging operation scheme. According to the method, the barge loading operation schemes of all steps are completed through automatic calculation, then the barge loading operation schemes of all steps are continuously and automatically executed according to the barge loading operation schemes of all steps, the calculation amount is small, the process is continuous, ballast water of the barge is mainly controlled, control is more visual, and the barge loading period is shortened.

The invention relates to a 1, 1, 3, 3-tetramethylbutyl hydroperoxide synthesis system and a 1, 1, 3, 3-tetramethylbutyl hydroperoxide synthesis process, belongs to the technical field of fine chemical engineering and dangerous chemical synthesis, and provides a 1, 1, 3, 3-tetramethylbutyl hydroperoxide synthesis system and a 1, 1, 3, 3-tetramethylbutyl hydroperoxide synthesis process for solving the problem of low reaction rate caused by immiscibility of substrates and reduction of effective collision of molecules in the synthesis process of 1, 1, 3, 3-tetramethylbutyl hydroperoxide. The system comprises a feeding unit, a micro-reaction unit, a product collection and post-treatment unit and a safety control unit which are communicated with one another, reaction heat can be instantaneously removed by virtue of mutual cooperation of the units and the extremely high heat transfer efficiency of a micro-channel reactor, heat accumulation and local overheating are avoided, and the reaction efficiency is improved. And the risk that the reaction is out of control is fundamentally eliminated. And the safety control unit realizes real-time monitoring and automatic emergency treatment of temperature and pressure, and provides double insurance for high-risk reaction.

The invention relates to a silicon-copper co-oxide catalyst for strengthening CO2 electroreduction and preparation and application of the silicon-copper co-oxide catalyst for strengthening CO2 electroreduction, and the preparation method comprises the following steps: dissolving soluble copper salt and tetraethoxysilane in ethanol to form a uniformly mixed precursor solution; the precursor solution is conveyed to a spraying nozzle through a sample injection pump, the spraying nozzle atomizes the precursor solution into aerosol through atomization gas and sprays the aerosol into a combustion chamber, the aerosol is combusted under the high-temperature condition of the combustion chamber, evaporation, pyrolysis and oxidation reactions are generated, and nano-particles are generated; and putting the nano particles into a quenching device, and rapidly cooling to obtain a nano Si-Cu-Ox co-oxide, namely the catalyst. When the catalyst is applied to the process of preparing ethylene through CO2 electroreduction, Cu < + > active species generated in the electroreduction process can be stabilized and prevented from being reduced, so that C-C coupling of an intermediate product is strengthened, and the selectivity of an ethylene product is remarkably improved.

The present application provides a kind of herbal shoe pad and its preparation method and application, the preparation method includes the following steps: herbal raw material is crushed to obtain herbal short hair, then mixed with chemical fiber, by air laying to obtain cotton-like mixture, then the upper and lower surfaces of cotton-like mixture are attached with non-woven fabric, and the herbal shoe pad is obtained after heat bonding.The herbal shoe pad provided by the present application can make the shoe pad more environmentally friendly in an industrial mass production mode, while also achieving the use of raw herbal state to absorb foot sweat, decompose and dilute odor, achieve uniform structure, controllable thickness, wear-resistant and usable through air laying and heat bonding, and have the characteristics of original ecology, high adsorption and easy degradation.

The invention discloses a preparation method of a 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex, and belongs to the technical field of polymer monomer preparation, aromatic diacyl chloride and aromatic ether are used as raw materials, a crude product of the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex is continuously synthesized under the catalysis condition of a Lewis acid catalyst, and the crude product of the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex is subjected to post-treatment to obtain the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex. The high-purity 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex can be used as a polyether ketone ketone active monomer, and the effect of the active monomer can be exerted without adding aluminum in the polymerization reaction process.

This invention discloses a pulsed current-assisted strip stamping forming device, relating to the field of composite metal strip processing technology, to solve the problem of how to prepare reliably bonded composite strips under small deformation conditions. The pulsed current-assisted strip stamping forming device includes: a bearing device with a bearing surface, a first electrode disposed on the bearing surface, and at least two metal strips to be bonded stacked on the first electrode. A moving device is disposed on the bearing surface, and a pulsed current-assisted stamping device is disposed on the moving device, positioned above the first electrode. The moving device is used to move the pulsed current-assisted stamping device to or away from the metal strips, and a pulse power supply is electrically connected to the pulsed current-assisted stamping device and the first electrode. This invention achieves the preparation of reliably bonded composite strips under small deformation conditions by simultaneously applying pulsed current and stamping force to the area of ​​contact by the pulsed current-assisted stamping device.

The invention belongs to the technical field of waste liquid resourceful treatment, and particularly relates to a phase separation and recovery device for polyacrylonitrile spinning dimethyl sulfoxide-containing waste water. Comprising a transpiration multi-section type combined pipeline which comprises a continuous S-shaped flow channel formed by alternately connecting vertical sections and horizontal sections; a heat supply system; and each condensation recovery device is connected with the corresponding horizontal section. By adopting the S-shaped transpiration multi-section combined pipeline, transpiration, separation and condensation are integrated, the space utilization rate is high, and the process is continuous. A pneumatic device is arranged in the pipeline, so that gas flow conveying in a specific direction is realized, and the conveying flow of a gas-fog mixture can be adjusted; through the multi-stage gradient heating combination including external heating and inert gas mixing heating, the heating efficiency is high, and the phase separation process can be more accurately controlled; the design of a condensation recovery device is matched, so that the separation efficiency of DMSO and water and the product purity are effectively improved.

The invention discloses a refining device and method for a nitrogen-containing compound and application. The refining device comprises a light component removal tower, an ammonia recovery tower, a separation tower, a product tower, a wastewater tower, a wastewater cooler and an absorption tank, the tower top of the light component removal tower is connected with the absorption tank; the tower bottom of the light component removal tower is connected with an ammonia recovery tower, and the ammonia recovery tower is connected with a separation tower; the tower top of the separation tower is connected with the product tower, and the tower bottom of the separation tower is connected with the wastewater tower; the tower top of the wastewater tower is connected with a wastewater cooler, and the wastewater cooler is connected with the absorption tank; an inlet is formed in the light component removal tower; outlets for refined products of the nitrogen-containing compound are formed in the product tower and the wastewater tower. The refining device of the nitrogen-containing compound disclosed by the invention can be used for refining a reaction product of acetonitrile prepared by ammoniating methyl acetate, is environment-friendly and is suitable for industrial large-scale continuous operation.

The application discloses a watchband laser cutting device and a cutting method. A work round table is arranged, and a plurality of positioning clamps are arranged on one side of the work round table. The work round table is matched with a feeding mechanism, a laser cutting mechanism and a discharging mechanism, and work is performed between the corresponding positioning clamps, so that the watchband to be processed can sequentially complete the feeding, positioning, cutting and discharging processes, thereby forming a continuous and orderly processing flow. The positioning clamp is formed by a fixed block and two clamping plates, and the clamping space gradually increases in the direction away from the surface of the fixed block, so that the watchband can be more smoothly introduced into the clamping area when entering the positioning clamp, and better guiding and limiting effects are obtained during the entering process, thereby improving the stability and consistency of the watchband placement posture, reducing the occurrence of inclination, lifting or inaccurate positioning of the watchband in the processing area, and thereby maintaining high corresponding precision between the laser cutting position and the predetermined processing area.

The utility model discloses a kind of metal shell plate length measuring counting mechanisms, belong to bar-shaped battery production and manufacturing field, including vertical frame body, first guide component and second guide component are vertically arranged on the vertical frame body, and the vertical frame body between first guide component and second guide component is provided with a length measuring counting component;Metal shell plate moves along the horizontal transverse of the middle part of vertical frame body, and sequentially passes through first guide component, length measuring counting component and second guide component.The utility model is designed through vertical frame body, can effectively save horizontal installation space, adapt compact production site layout, by vertically setting first guide component and second guide component on vertical frame body, the horizontal transverse moving path of metal shell plate can be bidirectional limited, avoid the deviation, skew in the movement of metal shell plate, improve work efficiency.

The utility model discloses a vehicle charging socket, which comprises a socket main body, a charging port is arranged on the socket main body, a plurality of lead jacks are arranged in the charging port, the charging port is used for being butted with a charging plug, a movable part and a protection door are arranged in the socket main body, and the movable part is arranged on the socket main body and is in transmission connection with the protection door; the protection door is arranged in the socket main body in a sliding manner so as to close or open the wire jacks in the sliding process; the movable piece is provided with a limiting part, the socket main body is provided with a mistaken opening part, and the mistaken opening part stops the limiting part, so that the protection door is located at the position of closing the wire jack; the moving part moves to release the stopping state of the limiting part and the mistaken opening part, and then the moving part drives the protection door to slide to open the wire jack. The socket has the advantages that the limiting part is arranged on the movable part, the mistaken opening part is arranged on the socket main body, and the mistaken opening part stops the limiting part, so that the problems that the matching is unsmooth and the locking mechanism cannot play a role due to the fact that the protection door and the locking mechanism are separately arranged at present are solved. Unlocking and opening of the wire insertion hole are achieved in sequence through the movable part, the whole process is more continuous, the situation that unlocking and opening of the wire insertion hole are conducted synchronously is avoided, and therefore the situation that the protection door is stuck and cannot be opened is avoided.

The invention provides a preparation method of high-purity ethylhexylglycerin, a reaction system and ethylhexylglycerin. According to the method, crude ethylhexylglycerin obtained by a synthesis unit is taken as a raw material, primary separation is realized through a rectifying tower, moisture and most of raw material impurities in the crude ethylhexylglycerin are thoroughly removed, moisture is obtained at the tower top, the raw material intercepted in the tower can be recycled, and an ethylhexylglycerin fraction with the content of 99.5% is obtained at the tower bottom; and the fraction enters a rectification purification tower, and is separated and purified by the rectification purification tower to obtain a colorless and odorless ethylhexylglycerin product with the purity of more than 99.99%. According to the preparation method of the high-purity ethylhexylglycerin, the whole technological process is reasonable, the process is continuous, and the preparation method has the characteristics of low energy consumption, high product quality, no pollution and the like, is an efficient and feasible continuous refining process of the ethylhexylglycerin, and has a good industrial application prospect.

The invention belongs to the field of biological agriculture, and discloses rumen bypass glucose based on a polymer gel technology and a preparation method and application thereof. The rumen bypass glucose is prepared from 15 to 30 parts of agar, 10 to 25 parts of zein, 5 to 15 parts of locust bean gum and 40 to 65 parts of anhydrous dextrose. The preparation method comprises the steps of raw material crushing, pre-melting, twin-screw melt extrusion, pelletizing, cooling, screening and the like. According to the invention, agar-locust bean gum is utilized to form a compact gel network to realize physical blocking and screening, and low release (in vitro 12-hour release rate lt, 5%) in rumen and rapid and complete release (in vitro 8-hour release rate gt, 90%) in small intestines are realized by relying on hydrophobicity and enzyme response characteristics of zein. The product is suitable for a feed for dairy cows in a perinatal period and an initial lactation period, can remarkably improve energy negative balance, shorten non-pregnant time by about 20 days and increase milk yield by about 3.0 kg / head per day, and is natural in raw materials, simple and convenient in process and suitable for industrial production.

The present invention discloses an automated assembly device for inserting a cylindrical part into a rubber sleeve. The cylindrical part feeding unit, the rubber sleeve conveying unit, the top plate and the conveyor belt are all arranged on one side of a receiving platform. The spreading claws and the pressing seat are all arranged above the receiving platform. The rubber sleeve conveying unit conveys the rubber sleeve to the receiving platform, the spreading claws extend into the rubber sleeve and spread the rubber sleeve, and the cylindrical part feeding unit feeds the cylindrical part into the spread rubber sleeve; the pressing seat presses the rubber sleeve with the cylindrical part inserted on the receiving platform, and then the spreading claws are separated from the rubber sleeve. The top plate rises and pushes the cylindrical part with the rubber sleeve out from the receiving platform and conveys it to the conveyor belt. The present invention enables the cylindrical part feeding, the rubber sleeve feeding, the rubber sleeve and the cylindrical part assembly, and the finished part unloading after assembly to be all automated. The whole process is continuous, which greatly improves the production efficiency and has a good use effect.

The utility model relates to a continuous efficient reaction device for glycol ketal or acetal, and relates to the field of fine chemical production, the continuous efficient reaction device for glycol ketal or acetal comprises a condensation tower, an oil-water separator and a rectifying tower, the condensation tower is filled with a catalyst; the oil-water separator is communicated to the output end of the condensation tower and is provided with a first discharge hole for outputting a water phase; the rectifying tower is communicated to the first discharge hole of the oil-water separator, and the rectifying tower is provided with a second discharge hole for outputting dihydric alcohol and a third discharge hole for outputting water; the third discharge hole is communicated to the output end of the condensation tower and is used for supplementing raw materials to the condensation tower. The dihydric alcohol separated after water is removed through rectification can be used as a raw material to be re-put into the condensation tower to be subjected to condensation reaction with ketone or aldehyde, and the method has the characteristics of continuous process, low investment and capability of promoting ketal or aldolization reaction without carrying water through an entrainer, and has relatively high industrial value.