31results about How to "Improve the purification effect" patented technology

The application discloses a micro-fluidic chip and a method for recovering nucleic acids with different fragment sizes. The method can realize recovery of nucleic acids with different fragment sizes by repeatedly washing and recovering magnetic beads through the micro-fluidic chip. The method can improve the overall nucleic acid recovery effect by adjusting the adding concentration of the magnetic beads and PEG salt and the washing times, and can distinguish and control the nucleic acid length, and all the nucleic acids with different fragment lengths can be obtained by continuously adjusting the concentration. Moreover, the method can realize small volume, high throughput and automation.

The application discloses a method for preparing high-purity tellurium dioxide powder from waste tellurium dioxide target material, comprising the following steps: step one, crushing the waste tellurium dioxide target material to obtain tellurium dioxide pre-crushed material; step two, ball-milling the tellurium dioxide pre-crushed material and drying to obtain tellurium dioxide powder; and step three, purifying the tellurium dioxide powder to obtain high-purity tellurium dioxide powder. 131 The application solves the problems of traditional powderization process, such as serious powder agglomeration, wide particle size distribution, easy introduction of impurities and poor industrial applicability, and the prepared powder can be directly applied to the production of tellurium dioxide target material, and the method can also be applied to the preparation of tellurium dioxide single crystal, infrared acousto-optic devices and electronic component materials, and has excellent industrial application prospect.

The utility model discloses an adsorption tower, adsorption system and hydrogen production machine, wherein the adsorption tower comprises: a tower body having an adsorption chamber for filling adsorbent, the bottom of the tower body being provided with a first vent hole, the top of the tower body being provided with a second vent hole, the first vent hole, the adsorption chamber and the second vent hole being communicated in sequence; the distributor comprises a sieve plate and a splitter plate, the sieve plate is provided with a plurality of sieve holes and arranged at the bottom of the adsorption cavity, and the splitter plate is arranged on the side, facing the first vent holes, of the sieve plate, so that gas entering from the first vent holes is dispersed by the splitter plate and then enters the adsorption cavity from the sieve holes of the sieve plate. According to the utility model, the distributor is arranged to disperse gas, so that the gas can be prevented from directly impacting on the adsorbent to damage the adsorbent; meanwhile, the gas is dispersed and then is in contact with the adsorbent after being shunted by the sieve pores, so that the gas can be in full contact with the adsorbent, the gas is prevented from passing through the adsorbent without being fully purified, and the purification effect of hydrogen is improved.

The application belongs to the technical field of biological medicine, and particularly relates to a polypeptide degradation agent for targeted degradation of CD26 and a preparation method and application thereof. The polypeptide degradation agent is obtained after coupling of a tetrapeptide and lenalidomide. The amino acid sequence of the tetrapeptide is any one of SEQ ID NO. 1 and SEQ ID NO. 2. The polypeptide degradation agent can specifically target and degrade DPP4, i.e. CD26, but cannot degrade DPP4 isozymes such as DPP7, DPP8 and DPP9, and thus has high selectivity. In addition, the polypeptide degradation agent has small molecular weight, one end is a natural short peptide, has good tissue compatibility, can quickly degrade target proteins in 6 hours, and thus has good tissue permeability.

The application provides a pickling purification method of porous carbon for silicon-carbon negative electrode materials and a product thereof, and belongs to the technical field of battery material preparation. The method overcomes the defects of poor purity and long process flow of the existing pickling method. The production method comprises the following steps: crushing carbonization raw materials to 20-50 meshes, and then performing physical activation. The method further comprises the steps of "blowing and stirring cleaning" and "belt rinsing while simultaneously performing vacuum exhaust and controlling the water content to be 60%". The porous carbon is deeply and efficiently purified, so that the iron content and ash content of the porous carbon are reduced to a very low level (Fe<30ppm, ash content<0.2%), and the high-pore structure (iodine value≥1600mg / g) of the porous carbon is maintained. The unique blowing and stirring method has smaller shearing force on the carbon skeleton, and better protects the microstructure of the porous carbon. The belt rinsing is continuously operated, and has high automation degree, and is suitable for large-scale industrial production. The porous carbon product prepared by the method has very high purity and high specific surface area, and meets the needs of high-end lithium ion batteries.

The utility model discloses glacial acetic acid purification equipment and relates to the technical field of glacial acetic acid purification. According to the glacial acetic acid purification equipment base, four supporting legs are fixedly connected to the upper surface of the base, a distillation flask is fixedly connected to the upper ends of the four supporting legs, and an accelerated purification mechanism is arranged on the distillation flask; the accelerated purification mechanism comprises a liquid inlet pipe, a steam pipe, a motor, a vertical shaft, a heating seat, a mixing rod, a first rotating hole, a second rotating hole, a connecting pipe, a heating rod, a reset spring, a mounting block, a pushing plate and a rotating sliding plate, and the steam pipe is fixedly connected to the upper surface of the distillation flask. And the mixing rod rotates to stir a mixture in the distillation flask, so that the mixture is mixed more uniformly, and the mixture in the distillation flask is heated more uniformly and efficiently, thereby ensuring the purification efficiency and quality of glacial acetic acid.

The invention belongs to the technical field of rice bran wax purification, and particularly relates to rice bran wax purification equipment which comprises a centrifugal separation box, the upper end of the centrifugal separation box is hermetically covered with a box cover, and a first motor is fixedly mounted in the center of the lower end of the centrifugal separation box; the output end of the first motor penetrates through the bottom of the centrifugal separation box and is coaxially and fixedly connected with a centrifugal disc in the centrifugal separation box. The rice bran wax purification process adopts the rice bran wax purification equipment for purification, and comprises the following steps: S1, putting the wax paste to be purified and the ternary azeotrope into the stirring tank according to a certain proportion, and uniformly stirring and mixing at a certain temperature through the second motor and the stirring rod. The device has the advantages that the centrifugal layering work can be quickly and effectively completed, the centrifugal efficiency is improved, the subsequent treatment and procedure continuity are ensured, and the purification effect and efficiency are greatly improved.

The application relates to a cooling system for NMP rectification, which comprises a condenser, a cooling tower, a lithium bromide cooling unit and a cooling water storage tank, the lithium bromide cooling unit is internally provided with an evaporation area, a liquefaction area and a throttle valve, rectification tower steam condensate outside the lithium bromide cooling unit passes through the evaporation area and is connected with the cooling tower, a circulating water pool is arranged at the bottom of the cooling tower, the cooling tower and the circulating water pool are both connected with the liquefaction area, a feeding port and a discharging port are arranged on the condenser and used for conveying NMP materials, a liquid inlet and a liquid outlet are arranged on the condenser, the liquid outlet is connected with the throttle valve inside the lithium bromide cooling unit, a liquid inlet pipe is arranged between the liquid inlet and the throttle valve, and the cooling water storage tank is arranged on the liquid inlet pipe. The application can improve the purification effect of NMP recovery.

This utility model provides a packing section and a distillation column having the packing section, belonging to the technical field of distillation columns. The packing section includes: a main layer composed of corrugated plate packing, wherein the specific surface area of ​​the corrugated plate packing is ≥800 m². 2 / m 3 Furthermore, a diffusion layer is placed on the main body layer, the diffusion layer being composed of wire mesh corrugated packing or random packing, the diffusion layer having diffusion paths for liquid to diffuse in multiple directions along the cross-section of the distillation column. Distillation columns employing this packing section can fully utilize the advantages of high specific surface area packing to achieve excellent mass transfer efficiency.

The invention relates to the technical field of traditional Chinese medicine active component extraction and raw material medicine purification, in particular to a staged extraction and purification method of traditional Chinese medicine active component raw material medicine. Wherein the raw material medicine of the active component of the traditional Chinese medicinal materials is a matrine raw material medicine, and the preparation method comprises the following steps: S1, carrying out contact extraction on the matrine-containing traditional Chinese medicinal materials and an acidic ethanol aqueous solution to obtain a total alkaloid extracting solution; s2, obtaining a first-time segmented extraction solution; s3, obtaining a desalted enrichment solution; s4, obtaining a matrine fumarate crystal; s5, obtaining a matrine organic phase; and S6, obtaining the matrine bulk drug. By constructing a series purification technical scheme of ethanol-phosphate aqueous two-phase segmented enrichment, nanofiltration dialysis replacement desalination, fumaric acid selective salification crystallization, free alkali release extraction and displacement anti-solvent crystallization, segmented selective enrichment and purification of matrine in the total alkaloid extracting solution are realized.

The invention belongs to the technical field of biological detection and analysis, and particularly relates to an adenosine phosphate photoaffinity probe as well as a preparation method and application thereof. The probe comprises an AMP-N (adenosine monophosphate-N) photoaffinity probe, an ADP-N (adenosine monophosphate-N) photoaffinity probe and an ATP-N (adenosine monophosphate-N) photoaffinity probe, the phosphoric acid part of adenosine monophosphate is modified with a photoaffinity group diaziridine with a small volume and alkynyl capable of carrying out a biological orthogonal reaction, and a connecting bond capable of cracking under an acidic condition is designed between adenosine monophosphate and a photoreactive group. The probe is high in stability and good in marking efficiency, can specifically mark the adenosine phosphate binding protein and identify the binding site of the adenosine phosphate binding protein, is suitable for screening, functional research and affinity analysis of the adenosine phosphate binding protein and discovery and verification of related drug targets, and has a wide application prospect.

The utility model discloses a stirring device for separating palm oil and extracting lubricating oil, which relates to the technical field of lubricating oil production and comprises a separation barrel, a conveying pipeline is connected to the bottom end of the side wall of the separation barrel, and a first filter screen is fixed to one end, located at the separation barrel, of the conveying pipeline. The other end of the conveying pipeline is connected with a secondary extraction box, a separation assembly is arranged in the secondary extraction box, the top of the secondary extraction box is connected with a pressurization assembly, a partition assembly is arranged at the position of the conveying pipeline, the separation assembly comprises a second filter screen fixed to the inner wall of the secondary extraction box, and an activated carbon particle layer is laid at the upper end of the second filter screen. According to the palm oil filtering device, palm oil is stirred by the stirring assembly, the first filter screen is cleaned by brush bristles of the scraping rod, and smooth filtering is guaranteed; an activated carbon particle layer in the secondary extraction box adsorbs harmful components, and a second filter screen further filters impurities, so that the purification effect is improved; the pressurizing assembly can pressurize and discharge residual oil, the partition assembly controls conveying, and the bottom of the separation barrel is designed to facilitate impurity discharge.

The invention discloses a lactic acid bacteria bionic extracellular vesicle as well as a preparation method and application thereof, and belongs to the technical field of medical materials. According to the preparation method of the lactic acid bacteria bionic extracellular vesicles disclosed by the invention, lactic acid bacteria cells are efficiently broken by utilizing a high-pressure homogenization technology, and the lactic acid bacteria bionic extracellular vesicles are separated and purified by adopting differential and ultraspeed centrifugation. The preparation method disclosed by the invention is simple and controllable in process, and large-scale amplification and standardized production are easy to realize; the obtained bionic extracellular vesicles of lactic acid bacteria are higher in yield and uniform in particle size than natural extracellular vesicles, have similar safety to the natural extracellular vesicles of lactic acid bacteria, and can promote immune maturation of dendritic cells and drug delivery carrier activity. The compound can be used as a vaccine adjuvant, an immunopotentiator and a vaccine and nano-drug delivery carrier to be applied to the field of biological medicine.

This utility model discloses a chlorinator for chlorobenzene production, belonging to the field of chlorobenzene production technology. It includes a first cylinder and a second cylinder arranged sequentially from bottom to top. The first cylinder has a skirt at its bottom, which is bolted to the ground. The lower part of the second cylinder is conical, and its lower end is bolted to the first cylinder via a flange. The top of the second cylinder has a sealing head, which is bolted to the second cylinder via a flange. The diameter of the second cylinder is larger than that of the first cylinder. This utility model increases the diameter of the second cylinder from its connection point with the first cylinder upwards, enlarging the top space of the chlorinator and allowing it to fully utilize its gas-liquid separation function. This allows hydrogen chloride gas and benzene vapor to separate from the crude chlorination liquid, reducing the benzene content in the hydrogen chloride gas, decreasing benzene consumption, and simultaneously enhancing the purification effect of the crude chlorination liquid, thereby increasing product yield.

The utility model relates to the technical field of nitrous oxide purification devices, in particular to a medical nitrous oxide purification device which comprises a purification tank with a supporting column at the lower end, a sealing cover detachably mounted at the upper end of the purification tank, an inner container fixedly mounted in the purification tank and used for containing purification liquid, and air outlet holes symmetrically formed in one end of the inner container. A mounting frame is rotatably mounted on the outer side of the inner container, annular purification plates are mounted on the outer side of the mounting frame in a linear array mode, mounting grooves are formed in the inner wall of the purification tank in a linear array mode, cleaning assemblies are mounted in the mounting grooves, an air inlet pipe is fixedly mounted at the lower end of the purification tank, and an air outlet pipe is fixedly mounted on the outer side of the purification tank; nitrous oxide gas is automatically purified through the purification liquid and the annular purification plate, the purification effect is good, impurities attached to sieve pores of the annular purification plate can be automatically sucked, and the sieve pores are prevented from being blocked after long-time use, and the purification effect is prevented from being reduced.

The invention discloses an adsorber and an adsorption system.The adsorber comprises an outer barrel and a uniform distributor, the uniform distributor is arranged on the lower side of the inner side of the outer barrel and comprises an outer basket and a middle basket, a first air passing channel is arranged between the outer wall of the outer basket and the inner wall of the outer barrel, and a second air passing channel is arranged between the inner wall of the outer basket and the outer wall of the middle basket; the air passing holes are communicated with the first air passing channel and the second air passing channel, a plurality of first air vents are distributed in the side wall of the middle basket, and the first air vents are communicated with the second air passing channel and the inner side of the middle basket. Materials to be adsorbed enter the first air passing channel from the feeding hole to be buffered and slowed down, then enter the second air passing channel from the air passing hole, and enter the inner side of the middle basket and the inner side of the outer barrel from the first vent holes in the middle basket, so that the materials can be more uniformly dispersed to molecular sieves at different positions; the molecular sieve is fully utilized, the adsorption effect can be improved, the waste of the molecular sieve is reduced, and the service life is prolonged.

The utility model discloses an environment-friendly hexane purification device capable of improving the purification degree, and relates to the technical field of environment-friendly hexane purification devices, the environment-friendly hexane purification device comprises a first tank body, a second tank body, a distillation tank body and a connecting pipe, and the second tank body is arranged on one side of the first tank body. According to the environment-friendly hexane purification device capable of improving the purification degree, a driving motor is started, so that a first rotating rod and a second rotating rod can stir and mix sulfuric acid and hexane through a stirring plate, and the first rotating rod and the second rotating rod rotate oppositely during rotation, so that the mixing effect during stirring is improved; according to the environment-friendly hexane purification device, the mounting plate and the activated carbon plate are mounted into the protection frame along the positioning plate, so that the activated carbon plate filters distilled gas, macromolecular impurities can be removed, and the purification effect is improved. Therefore, the environment-friendly hexane purification device has a better filtering and purifying effect when being operated and used.

The invention discloses a sub-boiling distillation device utilizing azeotropic heat supply, and belongs to the technical field of distillation and purification. Comprising an azeotropic evaporation part, a sub-boiling distillation part nested in an azeotropic chamber, a condensate circulation control part and an integrated jacket structure. Heat is supplied through azeotropic evaporation, the sub-boiling state is automatically maintained through temperature gradient, and complex temperature control is not needed; secondary pollution is avoided through cooperative control of a non-contact liquid level sensor and a condensate buffer tank, and the evaporation temperature can be accurately controlled by adjusting the pressure or changing the composition of an azeotropic zone; the device has a single sub-boiling mode and a continuous two-stage distillation mode. A surface area enhancing inner component can be additionally arranged in the sub-boiling chamber, a liquid column is formed through surface tension, and the distillation efficiency is remarkably improved. The device is simple in structure, high in heat efficiency, good in purification effect and suitable for laboratory high-purity reagent preparation.

The application provides a suspension crystallization washing device and method, which comprises a raw material slurry pipeline, a washing tank, a product tank, a residual liquid pipeline and a product pipeline, wherein the washing tank is at least four, and the operation process comprises the following steps: a, unloading; b, feeding; c, final-stage washing; d, intermediate washing; and e, primary-stage washing; during the operation, at least one washing tank is in the step a or b, one washing tank is in the step c, one washing tank is in the step e, and the rest of the washing tanks are in the step d. Compared with the existing mechanical washing tower, the suspension crystallization washing device does not involve a dynamic sealing device; compared with the existing centrifuge washing device, the purification effect is good, and the manufacturing cost and difficulty of the device are significantly reduced.

The invention discloses a low-temperature crystallization purification device, and relates to the technical field of crystallization purification. The device comprises a workbench, a crushing mechanism is arranged on one section of the upper surface of the workbench, the crushing mechanism comprises a crushing box, the crushing box is fixedly installed on the upper surface of the workbench, two crushing rollers are rotatably installed in the crushing box and matched with each other, and a driving mechanism is arranged on one side of the crushing box. A screening mechanism is arranged in the smashing box and located below the smashing roller, a first motor and a driving shaft are matched, the driving shaft drives a first belt to work, then the first belt and a rotating rod are matched, the first belt drives the rotating rod to rotate, then the rotating rod and a cam are matched, and then the rotating rod drives the cam to rotate. A cam is driven to beat a filter plate, so that the filter plate slides up and down on the surface of a guide rod, then the crushed carnallite crystals are screened through the filter plate, impurities in the carnallite crystals are screened out, and the effect of purifying the carnallite crystals can be improved.

The utility model discloses a kind of fluorine gas purification devices, belong to fluorine gas purification field, including jar body, the inside fixed mounting of jar body has processing mechanism, the outer surface of jar body is equipped with recess, the inside fixed connection of recess has anti-noise board, the bottom fixed connection of jar body outer surface has transmission mechanism, the upper surface of jar body is equipped with the hole groove of fixed installation feed pipe;Through the cooperation of above each device, the utility model is simple in structure, convenient to operate, when fluorine gas purification, fluorine gas can be made to flow slowly by spiral shell, spiral flow increases the residence time of gas in filter layer, improves the contact efficiency of impurity and filter material, improves purification effect, multilayer filter cover net cooperates spiral flow, can effectively multistage intercept different particle size impurities, obtain higher purity fluorine gas, subsequently, again through transmission mechanism can increase filtration frequency, improve purification effect, reduce impurity in fluorine gas.

The utility model provides a kind of vacuum distillation device for ammonia catalyst purification, comprising: distillation column, preheater being connected with the liquid inlet of distillation column by pipeline, condensing system being connected with the exhaust port of distillation column by pipeline, receiver being connected with the liquid outlet of condensing system by pipeline, cold trap tank being communicated with the gas outlet of the upper portion of receiver by pipeline, vacuum drying box being communicated with the top of cold trap tank by pipeline, and vacuum pump being communicated with the upper portion of cold trap tank by pipeline;Through the condensing system being connected with the exhaust port of distillation column, ammonia catalyst vapor generated by evaporation is effectively condensed into liquid, and is collected by receiver, cold trap tank being arranged at the gas outlet of receiver, further captures and condenses low-boiling-point component or small amount of ammonia catalyst vapor that is not completely condensed in condensing system, vacuum pump is arranged to make the whole system operate under reduced pressure, which is conducive to distillation at lower temperature, reduces the influence of high temperature on material, and improves the purification effect.

The invention provides a high-efficiency expression method of a Chlamydomonas reinhardtii HydA2 protein. The high-efficiency expression method comprises the following steps: constructing a pET-32a-TEV-HydA2 recombinant expression vector; obtaining a positive recombinant strain; carrying out induced expression on the Chlamydomonas reinhardtii HydA2 protein; and purifying the Chlamydomonas reinhardtii HydA2 protein. The invention also provides a crystallization method of the chlamydomonas reinhardtii HydA2 protein, and the chlamydomonas reinhardtii HydA2 protein prepared by the method is used as a raw material. A pET-32a vector is transformed through homologous recombination, a pET-32a-TEV expression system is constructed, and escherichia coli expression, induction and purification are combined, so that efficient soluble expression and activity retention of the chlamydomonas reinhardtii HydA2 protein are realized, the problems that the chlamydomonas reinhardtii HydA2 protein is easy to fold mistakenly, the activity is lost and the expression quantity is low due to oxygen sensitivity are solved, an effective crystallization system is established, and the chlamydomonas reinhardtii HydA2 protein is obtained. And a foundation is laid for structural analysis and hydrogen production research of green algae.

The utility model relates to a purification device for purifying high-purity argon by adopting common argon, which comprises a raw material crude liquid argon pipeline, a first main heat exchanger, a deoxidizing tower, a high-purity argon tower, a second main heat exchanger, a liquid argon subcooler, a high-purity liquid argon storage tank and a nitrogen circulating system, the top of the deoxygenization tower is output to the high-purity argon tower, a high-purity liquid argon pipeline is arranged at the bottom of the high-purity argon tower in a pumping mode, the high-purity liquid argon is directly fed into a high-purity liquid argon storage tank after being supercooled by a liquid argon supercooler, a deoxygenization evaporator is arranged at the bottom of the deoxygenization tower, a nitrogen removal evaporator is arranged at the bottom of the high-purity argon tower, and heat sources of the deoxygenization evaporator and the nitrogen removal evaporator adopt a nitrogen circulation system. The whole structure is relatively simple in composition, good in working stability, simple in operation process and good in purification effect, heat exchange is synchronously carried out on a plurality of pipelines, the efficiency of heat exchange work is improved, effective utilization of a source is guaranteed, energy consumption is reduced, a nitrogen circulating system can fully provide a heat source, and the evaporation and precipitation effect is good.

The application belongs to the technical field of wastewater treatment composite materials, and particularly relates to a super-hydrophobic melamine sponge for dye degradation and emulsion purification and a preparation method thereof. Ag-MOF and hydroxyl zinc fluoride nanoparticles are synthesized through a simple hydrothermal method, and the two kinds of nanoparticles are loaded onto the melamine sponge by using polydimethylsiloxane to obtain super-hydrophobic super-oil-wetting Ag-MOF@hydroxyl zinc fluoride@polydimethylsiloxane@melamine sponge, the hydrophobic angle of which is as high as 155.3°, and the adsorption capacity reaches 54.6-109.7g / g. Meanwhile, the super-hydrophobic super-oil-wetting Ag-MOF@hydroxyl zinc fluoride@polydimethylsiloxane@melamine sponge also shows excellent oil-water separation capacity (99%), dye degradation capacity (99%) and emulsion purification capacity (98%). Therefore, the modified sponge prepared by the application has a wide application prospect in the field of wastewater treatment.

The invention relates to a methanol production system and method for a floating hydrogen production platform. The methanol preparation system comprises a gas supply device, a synthesis device, a separation device, a storage device and a monitoring control device, wherein the gas supply device is provided with a frequency conversion module, and the monitoring control device is connected with the frequency conversion module and used for adjusting the pressure of gas to be reacted according to hydrogen source fluctuation of the floating platform so as to stabilize the gas supply pressure. Compared with the prior art, the provided methanol preparation system and method adopt green hydrogen and carbon dioxide as raw materials to prepare methanol, the offshore green hydrogen absorption is realized, the methanol is convenient to store and transport, and the overall safety is also improved. The frequency conversion module is introduced into the gas supply device to be matched with the fluctuation condition of a hydrogen source on the floating platform, so that gas source fluctuation in a wide range can be effectively adapted, the start-stop frequency of equipment is greatly reduced, the floating platform can still continuously and stably operate under the complex working condition, the methanol production capacity is remarkably improved, and the production cost is reduced. And the purity of methanol is further improved.

The negative pressure tower ethanol purification system comprises a negative pressure tower, a rectifying tower, a reflux tank and a vacuum unit, one end of a gas phase outlet pipe at the top of the negative pressure tower is connected with the rectifying tower, one end of a gas phase outlet pipe at the top of the rectifying tower is connected with a condenser through a condensation pipe, and one end of a discharge pipe of the condenser is connected with the reflux tank; one end of the return tank discharging pipe is connected with a finished product collecting tank. Under the action of negative pressure, an ethanol material mixed with isopropanol and 2-pentanone is introduced into the negative pressure tower, the isopropanol and ethanol are gasified and enter the rectifying tower for rectification, the 2-pentanone flows downwards and is discharged through the first liquid phase discharge pipe, the ethanol is gasified and is condensed through the condenser and then enters the reflux tank, and the isopropanol flows downwards and is discharged through the second liquid phase discharge pipe. In a negative pressure environment, light components and heavy components can be more quickly enriched towards the tower top or the tower bottom, the separation time is shortened, meanwhile, the system pressure is reduced, the boiling point of materials can be obviously reduced, and heat required by separation can be reduced. And through cooperation of the negative pressure tower and the rectifying tower, the ethanol purification effect and efficiency can be improved.

The utility model discloses a naphtha energy -conserving fractionating device, it includes base frame, the inner surface fixedly connected with heater of base frame, the outer surface of heater is provided with oil inlet pipe, the upper surface of heater is provided with oil gas pipe, the oil gas pipe is provided with processing box away from one end of heater, the right surface of processing box is provided with the communicating pipe, the communicating pipe is provided with fractionating column away from one end of processing box. Through setting motor, pivot and stirring shaft, can carry out sufficient stirring to the naphtha that enters the inside of heater to reduce temperature gradient to improve heat transfer efficiency, make the naphtha in the inside of heater reach the required temperature faster, finally reduce heating time, reduce energy consumption, through setting filter screen, can remove the impurity in oil gas to improve the purification effect of naphtha, and through setting the structure such as insertion slot, buckle seat and buckle assembly, can dismantle filter screen whole to improve practicality.

The utility model relates to the technical field of purification devices, in particular to an aluminum hydroxide powder purification device, which improves the grinding and crushing effects of aluminum hydroxide powder before purification, improves the purification effect and efficiency of the aluminum hydroxide powder, is convenient for grinding and crushing the aluminum hydroxide powder into different required particle sizes, and improves the use convenience. Comprising a tank body and a discharging pipe, and the discharging pipe is communicated with the bottom end of the tank body; the device further comprises a power device, a mixing device, a first valve, a grinding ring and a grinding roller, the first valve is arranged on the discharging pipe in a communicating mode, the grinding ring is installed on the upper portion of the inner side wall of the tank body, the grinding roller is rotationally installed on the power device, the power device is used for driving the grinding roller to rotate and conduct lifting adjustment, and a gap is formed between the grinding roller and the grinding ring. A feeding hole is formed in the top end of the tank body and is communicated with the gap, and a mixing device is arranged at the lower part in the tank body and is used for pickling and purifying aluminum hydroxide powder.

The invention belongs to the technical field of fish breeding, and particularly relates to a fish seminal plasma exosome, an extraction method and application in fish breeding. The extraction method of the fish seminal plasma exosome comprises the following steps: S1, centrifuging fish seminal fluid to obtain seminal plasma; s2, mixing the seminal plasma with PBS and BPS according to a certain volume ratio, and standing; s3, centrifuging the standing liquid to obtain a precipitate I; s4, centrifuging the precipitate I to obtain exosome precipitate; s5, adding seminal plasma into the exosome precipitate in proportion, mixing and resuspending to obtain a mixed solution I; s6, centrifuging the mixed solution I obtained in the step S5 to obtain supernate rich in exosome particles; and S7, placing the supernatant in an EPF column for centrifugation. The fish seminal plasma exosome can be used for in-vitro fertilization and artificial insemination pretreatment of fish sperms, especially in-vitro fertilization and artificial insemination pretreatment of turbot sperms, and can improve the fertilization success rate, the sperm activation efficiency and the sperm motility.