18results about How to "Short residence time" patented technology

The invention discloses a degradable organic-inorganic composite film and a preparation method and application thereof, and belongs to the technical field of composites.The method comprises the steps that 1, an organic amine stabilizer, a calcium source, a phosphorus source and an organic solvent are used for preparing a calcium phosphate nano-cluster precursor, and calcium phosphate nano-clusters are obtained through further separation; (2) mixing the calcium phosphate nano-cluster and a natural polymer material to prepare a uniformly dispersed emulsion, the natural polymer material including carboxymethyl chitosan and alginate, using the emulsion to prepare a membrane, and during the membrane preparation process, generating an evaporation-induced self-assembly process to prepare the membrane. The degradable organic-inorganic composite film is obtained by combining a rod-like hydroxyapatite nanocrystal which is formed by phase change of the calcium phosphate nanocluster and crystallization with a natural high polymer material. The organic-inorganic composite film has adjustable mechanical properties, can be naturally and directly degraded in soil, and has wide application prospects in the fields of packaging, agriculture, medical treatment and the like.

The invention discloses shaping and accurate grinding equipment for non-ferrous metal calendaring, and relates to the technical field of metal shaping and accurate grinding. The shaping and accurate grinding equipment comprises a grinding table, a supporting frame is fixedly connected to the upper end face of the grinding table, an air cylinder is fixedly connected to the supporting frame, a grinding motor is fixedly connected to the output end of the air cylinder, and a grinding wheel is fixedly connected to the output end of the grinding motor; when the grinding wheel deviates, the detection rod can be automatically pushed to drive the push plate to make contact with the power switch, the power switch is toggled to turn off the grinding motor, the problem of uneven grinding caused by deviation of the grinding wheel is avoided, and therefore it is ensured that key parameters such as flatness and roughness of the surface of non-ferrous metal can meet preset requirements; and an automatic stop mechanism can quickly respond to the deviation condition, and the situation that when the grinding wheel deviates, the grinding wheel continues to work, the surface of the non-ferrous metal is excessively ground or even penetrated, and consequently the product is locally damaged or scrapped is avoided, so that the rejection rate of the non-ferrous metal is remarkably reduced, and resource waste is reduced.

This invention belongs to the field of polymer synthesis and microchemical technology, and discloses a method for synthesizing hydroxyl-terminated polybutadiene in a continuous flow microchannel reactor. The preparation method includes mixing butadiene, anhydrous ethanol, 30% hydrogen peroxide, and an antioxidant under nitrogen protection to obtain a raw material liquid, which is then pumped into the microchannel reactor via a high-pressure metering pump. The mixture undergoes preheating initiation and polymerization reactions sequentially, with viscosity monitored by an online viscometer. After the reaction, the product is obtained through gas-liquid separation, sedimentation and stratification, washing, vacuum solvent removal, and filtration. This invention utilizes a microchannel reactor, which provides precise temperature control and stable pressure. Segmented temperature control and online viscosity adjustment prevent reactor blockage, resulting in high product conversion and yield, and uniform molecular weight distribution. By adding auxiliary devices to optimize the process, continuous and stable production is achieved, making it more efficient, environmentally friendly, and controllable.

The invention belongs to the technical field of bathroom cabinet machining, and provides a side cabinet polishing device and a polishing technology.The polishing device comprises a base, a containing plate is arranged on the base, a support is fixedly installed on the base, a lifting plate is arranged on the support, and an adjusting assembly for adjusting the position of the lifting plate is arranged on the support; in order to solve the technical problem that in the prior art, dust generated during grinding leaks outwards, and consequently the dust collecting effect is poor, a collecting cover covers a grinding area of a grinding disc, air is blown out through a first blowing pipe during grinding, then air can be comprehensively blown to the grinding disc at a gap between the bottom wall of the collecting cover and a side cabinet plate, and therefore the dust collecting effect is improved. Therefore, air blown out by the first air blowing pipe can blow dust moving outwards along the surface of the side cabinet plate back into the collecting cover, and the dust collecting device can be widely applied to dust collecting operation scenes.

The invention relates to the technical field of active component extraction of rhizoma polygonati, in particular to a method for extracting and separating multiple active components in rhizoma polygonati, which comprises the following steps: step 1, raw material preparation: removing silt from rhizoma polygonati rhizome, cleaning, drying the cleaned rhizoma polygonati to constant weight, and grinding the dried rhizoma polygonati in a grinding centrifugal device; step 2, component extraction: performing ultrasonic-assisted pretreatment on the rhizoma polygonati; extracting flavonoid compounds in rhizoma polygonati by adopting an alcohol extraction method; extracting polysaccharide components in rhizoma polygonati by adopting an alcohol precipitation method; step 3, separation and purification: purifying the polysaccharide by using anion exchange column chromatography; and the flavonoid compounds are purified by using a macroporous resin adsorption method. According to the method disclosed by the invention, ultrasonic waves are utilized for pretreatment, so that the penetrating power of cell membranes is increased, and therefore, active substances in cells can easily permeate, and the purity and the quality of various active components in the finally extracted rhizoma polygonati are improved.

The utility model discloses an oxygen generator with an integral heat dissipation air duct, which comprises a shell, a heat dissipation fan and a booster pump are arranged in the shell, the shell comprises a top cover, a front cover plate and a bottom cover which are sequentially arranged from top to bottom, the heat dissipation fan is arranged close to the top cover, the booster pump is arranged close to the bottom cover, the bottom cover is provided with an air inlet, and the air inlet is communicated with the front cover plate. An air outlet is formed in the upper side of the front cover plate, and an air guide plate used for guiding air entering the shell from the air inlet to the middle in the shell is arranged on the bottom cover. The air inlet is formed in the front side of the bottom cover, the air guide plate comprises an air bearing part corresponding to the air inlet and an air guide part used for guiding air to the middle of the shell, and the air guide part is in a curved surface shape protruding towards the surface where the air inlet is located. According to the utility model, efficient heat dissipation can be carried out on the whole inside the oxygen generator.

The invention discloses an anti-hypoxia water-swallowing-free solid beverage. The beverage comprises the following components: 2 parts of a plant extract, 2 parts of a compound sweetening agent, 0.15 part of DL-malic acid, 0.01 part of menthol and 6.5 parts of soluble starch. The ratio of the plant paste powder to the glucose is 3: 1. The ratio of the common turnip to the ginseng to the astragalus membranaceus to the medlar is 3: 1: 2.3: 2.5. The compound sweetening agent comprises the following components: sorbitol, maltitol and mogroside in a mass ratio of 5: 5: 3. According to the present invention, the characteristics of the powdery drug and the liquid drug are integrated, the granular instant solid beverage is prepared, the instant characteristic and the water-free infusion characteristic are combined, the instant solid beverage can be taken without water in the plateau area, and the conditions of high stroke, dust flying and the like in the plateau environment can be avoided to a certain extent due to the granules; the content of raw material components is judged through multi-index comprehensive evaluation of an analytic hierarchy process and a fuzzy mathematical evaluation method, a proportion capable of being rapidly dissolved in the oral cavity is selected through multiple groups of experiments, the remaining time in the oral cavity is shortened, and stimulation to taste buds is reduced.

The invention discloses nutrition-enriched edible vegetable oil and a preparation process thereof, and belongs to the field of edible oil processing. According to the invention, a nutrition-enriched grease product is developed by optimizing a grease processing technology, adjusting refining process parameters, properly retaining phospholipid and maximally retaining inherent nutrient substances such as vitamin E and the like, and adding a proper amount of vitamin D and vitamin A; animal experiments prove that the product plays a significant role in reducing the level of brain inflammatory factors and improving the oxidative stress resistance of the brain, has the effect of improving cognition, and provides a scientific basis for the future functional edible oil market.

The invention belongs to the technical field of weeding, and discloses a weeding composition and application thereof. The weeding composition comprises an active component A, an active component B and an active component C. The active component A is penoxsulam, the active component B is bensulfuron methyl, the active component C is anilofos, and the mass ratio of the active component A to the active component B to the active component C is (1-50): (1-50): (1-150). The weeding effect of the composition is stable, and the weeding effect is good. The weeding composition has the advantages that the dosage is reduced, the pesticide cost is reduced, the influence degree on the environment is reduced, the weed control spectrum is expanded, and the weeding composition has a good control effect on weeds in paddy fields.

The utility model discloses an ink production is with storage tank, belong to ink production device technical field. The utility model discloses a storage tank body, scraper and support, be equipped with the storage cavity in the storage tank body, the scraper is contacted with the inner wall of storage cavity, the outer surface of scraper is equipped with counterweight, is equipped with the guide rail in the storage tank body, and the guide rail is linked together with storage cavity, and the counterweight is slidably fitted in the guide rail. The utility model discloses the scraper and counterweight who sets up the ink scraping of storage cavity inner wall, so that when the storage tank body is inclined to a certain angle and pours out the ink, the counterweight slides down along the guide rail, drives the annular scraper and scrapes the ink remaining on the inner wall of the storage tank body, and the counterweight drives the scraper reset when the storage tank body is back to normal, avoids the sealing problem and cost increase problem of using electric push rod, and the structure is simple with the mode of gravity drive, and reliable operation reduces the failure rate and maintenance cost of equipment.

This invention relates to a continuous flow stepwise crystallization method and system for preparing micro / nano HMX at the microscale. It includes the following steps: (1) dissolving HMX in a solvent to form an HMX solution, and mixing the solvent and antisolvent to prepare a crystallization transfer solution; (2) flowing the HMX solution prepared in step (1) and the antisolvent into a primary micro-mixing crystallization unit at a desired flow ratio to generate a mixed-crystal HMX suspension with a mixed crystal particle size of 400 nm–60 μm; (3) flowing the mixed-crystal HMX suspension flowing out of the primary micro-mixing crystallization unit and the crystallization transfer solution prepared in step (1) into a secondary micro-mixing crystallization unit at a desired flow ratio, and secondary crystallizing the mixed-crystal system to obtain a pure β-HMX suspension with a crystal size in the micrometer range. This invention can obtain micro / nano β-HMX with high crystallization degree and high crystal purity by changing the mixing conditions and residence time in the secondary crystallization unit; the two-step crystallization method can meet the requirements for continuous and controllable preparation of high-quality elemental β-HMX with smaller crystal size and higher crystal purity.

The invention relates to a reaction system and method for continuously preparing a naphthenic amine hardener. The system comprises a microchannel reactor module, a slurry feeding unit and a hydrogen supply unit. The slurry feeding unit is used for providing slurry to the microchannel reactor module. The slurry comprises a raw material, a solvent and a catalyst, the raw material is 4, 4 '-diaminodiphenylmethane (MDA), and the hydrogen supply unit is used for supplying hydrogen to the microchannel reactor module to be in gas-liquid contact with the slurry and perform hydrogenation reaction to form a product containing 4, 4'-diamino-dicyclohexylmethane (PACM).

This utility model discloses a stamping die for rapid demolding, including a fixed die base, a punch base, and a demolding assembly. Through a precisely designed rotating mechanism and abutment teeth, the scrap sheet is smoothly ejected. A drive motor is installed in the die to drive the rotating ring assembly and the core-removing ring seat to generate relative motion, effectively demolding through meshing and lifting actions. A spring device is installed on the bottom surface of the fixed die base to push the punching ring downwards, assisting in the ejection of the scrap sheet. This die reduces the adhesion of scrap to the die surface, improves production efficiency, and extends the die's service life. The overall structure is simple, operation is easy, and it is widely applicable to metal stamping, plastic processing, and other fields.

This utility model relates to the field of glue removal furnace technology, specifically a dual-channel hot air circulation glue removal furnace. It includes a furnace body and a shell disposed within the furnace body; a first steel plate is fitted around the outer perimeter of the shell, forming a first annular cavity between the first steel plate and the shell; a second steel plate is fitted over the first steel plate, forming a second annular cavity between the second steel plate and the first steel plate; an air inlet pipe is disposed at the top of the furnace body, with its outlet connected to the first annular cavity; a fan is disposed at the top of the second annular cavity, and an air outlet is disposed on the corresponding first steel plate below the fan, connecting the first and second annular cavities through the air outlet; a heating element is disposed at the bottom of the second annular cavity; an exhaust pipe is disposed on the side wall of the second annular cavity; guide plates are fixedly disposed on both sides of the shell, with guide holes formed on the guide plates. Through the above technical solution, this utility model solves the problems of poor temperature uniformity and poor glue removal effect.

The utility model discloses a wafer dewatering device and a wafer cleaning machine, and belongs to the technical field of cleaning equipment of photovoltaic modules. The device comprises a mechanical arm, a feeding conveying module, a rotary dewatering mechanism and a discharging conveying module which are sequentially arranged, a plurality of basket grooves are formed in the rotary dewatering mechanism and used for containing baskets containing wafers, the mechanical arm is used for grabbing the baskets to be arranged at the feeding end of the feeding conveying module, the feeding conveying module is used for conveying the baskets into the basket grooves, and the discharging conveying module is used for conveying the baskets into the basket grooves. The discharging conveying module is used for taking the flower basket out of the flower basket groove. Based on the arrangement of a mechanical arm, a feeding conveying module, a rotary dewatering mechanism and a discharging conveying module, at least one of the problems that in the prior art, after being cleaned and dried, a wafer is manually moved to independent dewatering equipment to be dewatered, the residual time of residual liquid on the surface of the wafer is too long, the wafer is damaged, and the production efficiency is low is solved. The automatic dehydration of the wafer can be realized.

The invention relates to the technical field of oil and gas field yield increase, and provides an integrated composite transformation liquid and a preparation method thereof. The problems that in the prior art, fracturing fluid and acid fluid cannot be used by one liquid, crosslinking in the acid fluid and hydrogen ion slow release for rock surface adsorption cannot be met at the same time, the resistance reducing function is achieved in the acid fluid, and the desorption function is not achieved when the fracturing fluid and the acid fluid are used for a reservoir mainly containing adsorption gas are solved. According to the main scheme, the preparation method comprises the following steps: preparing a resistance reducing agent main agent, a retarding and desorbing component and a cross-linking agent component. The main agent of the resistance reducing agent is prepared from polyacrylamide, poly (N-isopropylacrylamide) and other raw materials; the retarding and desorption component comprises a fluorocarbon surfactant, a titanate coupling agent and the like; the cross-linking agent component is composed of an organic zirconium cross-linking main agent, an organic acid salt cross-linking ligand and the like. The acidizing and fracturing fluid is used for acidizing and fracturing construction of oil and gas fields, can meet the technological requirements of acidizing and fracturing at the same time, and has the advantages of resistance reduction, low residue, high retardance and deep penetration in acid liquor.

The invention provides a method for feeding a molten material into injection molding equipment and an assembly of the injection molding equipment, and belongs to the technical field of hot runner injection molding. The device comprises a body, the body is provided with a feeding port and a discharging port, the feeding port and the discharging port are communicated through an elbow-shaped channel, the elbow-shaped channel comprises a feeding channel, a connecting channel and a discharging channel, and the body is provided with a valve needle mounting hole which is connected with the connecting channel and used for mounting a valve needle capable of being arranged in the discharging channel. And a fluid reversing mechanism capable of enabling at least one part of fluid material to flow to one end opposite to the discharging end of the discharging channel in the connecting channel before the fluid material entering from the feeding hole reaches the connecting channel is arranged in the feeding channel, so that one part of the fluid material can continuously flow to the back surface of the valve needle and then enters the discharging channel. When the fluid material flows through the connecting channel, residues are not prone to being generated to block the connecting channel, the flow speed of the fluid material is high, and the residence time of the fluid material in the connecting channel is short.

The application relates to the technical field of plastics, in particular to a preparation method and application of low-temperature-resistant degradable plastics. The low-temperature-resistant degradable plastics contain, in parts by weight, carboxylated polycaprolactone C-PCL: 80-90 parts, modified lignin: 15-20 parts, nano-cellulose: 5-10 parts, crosslinking agent: 2-3 parts, and antioxidant: 0.3-0.5 parts. The modified lignin is prepared by grafting epoxy groups after the alkaline lignin is protected by p-benzene dicarboxaldehyde and hydroxylated; the crosslinking agent is prepared by condensation reaction of vanillin and hexanediamine, and the imine bond contained in the crosslinking agent endows the material with a good degradation rate under acidic conditions. The low-temperature-resistant degradable plastics prepared by the application have good low-temperature mechanical properties and excellent degradation speed under acidic conditions in the case of guaranteeing a certain service life, and are suitable for application to agricultural mulching films in cold environments.