234results about How to "Avoid deposition" patented technology

This utility model discloses a continuous deoiling device for microcrystalline wax, including a sealed wax melting tank and a deoiling device. The sealed wax melting tank transports the mixture to the inside of a spiral plate heat exchanger via a variable frequency pump. The spiral plate heat exchanger is connected to a high and low temperature integrated machine, which can circulate and cool the coolant flowing inside the spiral plate heat exchanger. The spiral plate heat exchanger transports the crystallized mixture to the inside of a centrifuge. The centrifuge separates the crystallized wax from the filtrate through centrifugal action, and the separated filtrate enters the sealed filtrate tank for recycling. This utility model can achieve continuous deoiling of microcrystalline wax through the synergistic effect of components such as the sealed wax melting tank, variable frequency pump, spiral plate heat exchanger, and centrifuge. At the same time, the curved structure in the channel of the spiral plate heat exchanger forces the fluid to form a strong spiral flow. The high flow velocity and turbulence can scour the wall surface and prevent wax crystals or impurities from depositing.

The utility model discloses a viscous protein filtering device, which relates to the technical field of egg liquid filtering and comprises a shell, a feed port, a waste outlet, a discharge port, a primary filter element assembly, a rotary filtering assembly, a cooling liquid circulating device, a buffer cavity, a graded filter element assembly, an ultrasonic-assisted filtering device and the like. Through the synergistic effect of multi-stage filtering devices of the first-stage filter element assembly, the rotary filtering assembly and the grading filter element assembly, large impurities are rapidly treated in the rough filtering stage, overload of the fine filtering assembly is avoided, step-by-step fine filtering is achieved, the problem of low efficiency caused by direct treatment of viscous materials through a single-stage high-precision filter membrane is solved, and the working efficiency is improved. A rotating shaft in the rotary filtering assembly rotates at a high speed to generate centrifugal force, spiral guide blades synchronously rotate along with the rotating shaft to form spiral downward fluid motion, the centrifugal force pushes liquid to be rapidly filtered, the spiral blades synchronously stir to avoid local impurity accumulation, dynamic filtering and instant cleaning circulation are formed, and the filter element blocking period is delayed.

The present application relates to a cleaning device and a sewage tank, the cleaning device comprising a machine body, the sewage tank and a rotary cutting assembly; the sewage tank is installed on the machine body; the rotary cutting assembly is arranged in the interior of the sewage tank and comprises a first cutting blade and a stirring blade; the first cutting blade is rotatably installed in the sewage tank; the stirring blade is arranged adjacent to the first cutting blade; the stirring blade is of an axial flow type blade profile; and the first cutting blade is of a centrifugal type blade profile; the stirring blade guides the dirt to the rotating path of the first cutting blade when rotating. The cleaning device of the present application is provided with the rotary cutting assembly in the sewage tank; the stirring blade can actively stir the dirt in the sewage tank; the dirt is guided to the rotating path of the first cutting blade; the rotating first cutting blade cuts and breaks the dirt; the dirt is conveniently discharged; the discharge outlet is prevented from being blocked; the maintenance work is reduced; and the user's experience is improved.

The application provides a take-up and pay-off device, a plasma enhanced chemical vapor deposition system and a graphene film preparation method. The take-up and pay-off device comprises a pay-off shaft, a take-up shaft, a base and a motor. The pay-off shaft is used for arranging a substrate; the take-up shaft is arranged in parallel with the pay-off shaft and is used for winding the graphene film and the substrate; the base is arranged below the pay-off shaft and the take-up shaft and is used for supporting the pay-off shaft and the take-up shaft; and the motor is connected with the take-up shaft and is used for providing power for the take-up shaft. Through the above design, the graphene film with a large width can be prepared, and the problem that the preparation of the large-size graphene film is limited at present is solved.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

This utility model belongs to the field of concrete construction equipment, specifically relating to a concrete trowel. It includes a frame located above a segment mold. Linear guide rails are mounted on both sides of the frame, with a linear motor and a sliding cover mounted on each rail. Mounting beams are mounted on the linear motors and sliding covers, and a cylinder is mounted above the mounting beams. A slider is mounted on the output end of the cylinder and is mounted on the mounting beams. A connecting rod is connected to the slider, and a trowel plate is hinged to the other end of the connecting rod. A cleaning component is provided on one side of the segment mold, including a cleaning groove with guide edges on both sides. The trowel plate is mounted on the guide edges. A lead screw is installed inside the cleaning groove, and a drive motor is located outside the cleaning groove. The output shaft of the drive motor is connected to the lead screw, and a cleaning block with scraping grooves is mounted on the lead screw. The purpose of this utility model is to provide a concrete trowel that solves the problem of residual concrete on the trowel plate after use, which affects the subsequent troweling effect.

The application belongs to the technical field of reaction kettles, and particularly relates to a vertical stainless steel reaction kettle, which comprises a kettle body, a separation cover fixedly connected to the top of the inner side of the kettle body, a sliding connection hole formed in the bottom of the separation cover, a first sealing ring clamped on the inner wall of the sliding connection hole, a stirring shaft slidably connected to the sliding connection hole through the first sealing ring, and a transmission groove formed in the top end of the stirring shaft; a driving device is installed on the top of the kettle body, a driving shaft is fixedly connected to the output shaft of the driving device, a spline is arranged on the shaft surface of the driving shaft, and the driving shaft is slidably connected to the transmission groove through the spline; in the application, the downward guiding of the material by the first spiral blade and the upward pushing of the bottom material by the inclined paddle blade are combined with the lifting movement of the stirring shaft driven by the hydraulic cylinder and the first spring to realize the up-and-down convection circulation of the material in the kettle body, effectively prevent the deposition, eliminate the stirring dead zone, and improve the space coverage capacity of the first spiral blade.

The utility model provides a mechanical-stirring-free low-temperature anaerobic giant underground reaction tank which comprises a reaction tank, a material distribution unit and a biogas collection unit, and geotechnical impermeable membranes are laid at the bottom, a dam and the top of the reaction tank; the material distributing unit comprises a material main pipeline and a plurality of discharging pipes, one side of the material main pipeline is connected with a feeding pipe, the other side of the material main pipeline is connected with a discharging pipe, a centrifugal pump is installed on the feeding pipe, a rotor pump is installed on the discharging pipe, and a material circulating pipe is further connected between the discharging pipe and the material main pipeline; the biogas collecting unit comprises a biogas collecting header pipe and a biogas collecting branch pipe, one side of the biogas collecting header pipe is connected with a biogas output pipe, and the biogas output pipe is connected with a Roots blower and a biogas output valve. The device is low in construction cost, integrates the functions of anaerobic reaction, biogas collection, material mixing circulation and the like, can stably run for a long time, and is suitable for being applied to farms in various places.

This invention relates to the field of battery separator materials technology, specifically to MXene-functionalized aramid paper-based battery separators, their preparation methods, and applications. Meta-aramid paper is prepared by wet papermaking using short-cut meta-aramid fibers and precipitated fibers. MXene nanosheets are prepared by hydrofluoric acid etching. Using the meta-aramid paper as a substrate, a functional coating is constructed on the surface of the aramid paper by loading a mixture of para-aramid nanofibers and MXene through a vacuum-assisted filtration-layer-by-layer self-assembly method. The resulting functionalized separator is obtained through protonation reduction. The separator, with its three-dimensional porous protective layer constructed from para-aramid nanofibers and MXene, combines physical barrier and chemical bonding, effectively inhibiting polysulfide shuttle. Furthermore, the highly active sites of MXene can activate inert sulfur-containing substances, improving sulfur utilization. When used in assembling lithium-sulfur batteries, the separator achieves an initial discharge capacity of 1244 mAh·g at a constant current density. ‑1 The capacity retention rate is 82% after 200 cycles.

The utility model discloses an integrated sewage treatment regulating reservoir which comprises a regulating reservoir body, filter chambers are fixedly connected to the two sides of the top end of the regulating reservoir body, a water outlet is formed in one side of each filter chamber, first sliding grooves are formed in the two sides of the interior of each filter chamber, and sliding rods are connected to the first sliding grooves in a sliding mode; a filtering assembly is arranged on one side of the sliding rod, a water pumping assembly is arranged at the top end of the adjusting tank and located on one side of the filtering chamber, a portal frame is fixedly connected to the adjusting tank, and a stirring assembly is arranged at the bottom end of the portal frame. According to the sewage treatment device, sewage entering the regulating tank is filtered through the filtering assembly, fine suspended solids and particles on the sewage are removed, blockage of a water pipe and a valve is avoided, the situation that the suspended solids and the particles are deposited at the bottom, an operator needs to clean the regulating tank is effectively prevented, and the labor intensity of the operator is reduced.

A continuous solid-liquid reaction device for gas treatment belongs to the technical field of flue gas desulfurization and manganese resource recovery equipment and comprises more than three reaction kettles which are connected in series through gas guide pipelines, each reaction kettle is provided with a gas inlet pipe joint, a feeding pipe joint, a gas outlet pipe joint and a discharging pipe joint, and a gas distribution device communicated with the gas inlet pipe joint is arranged in each reaction kettle. A stirring device is also arranged; the gas distribution device comprises more than two layers of gas distribution pipes which are communicated through a communication pipeline; a plurality of gas distribution holes are formed in the side walls of the gas distribution pipes; the stirring device comprises more than two layers of stirring paddles, and the stirring paddles are arranged above each layer of gas distribution pipe. The core design of'mixing gas with liquid without mixing 'is adopted, the gas distribution device is combined with stirring, so that gas is uniformly released in a small bubble form, the retention time is prolonged, and multi-stage full utilization of the gas is realized in cooperation with the gas series design. And multi-layer graded gas distribution is matched with layered stirring, so that gas-liquid-solid three-phase contact is sufficient, the reaction is stable, and deposition and short circuit are avoided.

The invention discloses a graded regulation and control electrolyte for improving the low-temperature performance of a lithium iron phosphate-based lithium ion battery and a preparation method of the graded regulation and control electrolyte, and belongs to the technical field of lithium ion batteries. The electrolyte is prepared from the following components in percentage by mass: 70 to 90 percent of solvent system, 10 to 25 percent of lithium salt and 0.5 to 2 percent of functional additive, a solvent system comprises fluoroethylene carbonate as an inner shell layer, low-melting-point carboxylic ester as a middle layer and a mixture of two chain carbonates as a base layer. According to the electrolyte, the capacity retention ratio of the LFP battery at-30 DEG C is remarkably improved, the polarization voltage is reduced, the cycling stability is improved through graded regulation and control of a solvation structure, and the electrolyte is simple in preparation process and suitable for large-scale production.

A gas-liquid separation device and method for industrial production of carbon dioxide reduction by electrolysis. The device includes a gas-liquid mixture inlet / outlet control unit, a heat exchange and cooling unit, and a gas-liquid mixture separation and sludge discharge unit. The gas-liquid mixture inlet / outlet control unit receives the gas-liquid mixture from the electrolysis reaction system and enables its directional flow. The heat exchange and cooling unit provides a heat exchange interface to absorb heat from the gas-liquid mixture flowing through its path, cooling the mixture from its initial reaction temperature to a preset temperature. The gas-liquid mixture separation and sludge discharge unit utilizes the density difference between the gas and liquid phases and gravity in the cooled mixture to cause the gas phase component to rise and be discharged, while the liquid phase component settles and accumulates at the bottom of the unit, thus achieving gas-liquid separation. The device is small in size and has standardized interfaces, facilitating direct coupling with large electrolytic cells.

The utility model discloses an MBR (Membrane Biological Reactor) membrane reaction device which comprises a shell, a plurality of limiting plates are fixedly connected to the top position of the inner wall of the shell, a limiting groove is formed between every two adjacent limiting plates, a limiting block is slidably connected in each limiting groove, a detachable water producing pipe is fixedly connected to the bottom of each limiting block, and a water outlet pipe is fixedly connected to the bottom of each water producing pipe. A plurality of fixing plates are fixedly connected to the position, located at the bottom, of the inner wall of the shell, and two inserting holes are formed in the top of each fixing plate. According to the MBR membrane module disclosed by the utility model, through the mutual matching effect of the fixing pipes, the limiting grooves and the limiting blocks, quick disassembly and assembly of the MBR membrane module are realized; moreover, the stability of the MBR membrane group during working can be ensured through the mutual matching effect of the baffle and the notch, and the MBR membrane group can be cleaned through the mutual matching effect of the aeration pipe and the air inlet pipe.

The utility model provides an aeration nozzle and a preparation box, and effectively solves the problems that solid-liquid mixtures such as coal slime and sludge are easy to mix unevenly and easy to layer and deposit during storage, the aeration nozzle is easy to block and difficult to clean, and the like. An air flow channel is arranged in the aeration nozzle, the air flow channel penetrates from the tail part of the aeration nozzle to the head part of the aeration nozzle, and the air flow channel mainly comprises a nozzle inlet, a rear cavity, a throat-shaped cavity, a main body cavity and a spray hole which are sequentially arranged from the tail part of the aeration nozzle to the head part of the aeration nozzle; the diameter of the rear cavity is gradually reduced from the inlet to the outlet, and the diameter of the main body cavity is gradually increased from the inlet to the outlet. The aeration nozzles form a circle of aeration nozzle group, the aeration nozzles in the circle of aeration nozzle group are annularly and uniformly distributed, and the aeration nozzle group is mounted on the inner wall of the preparation box; and a plurality of circles of aeration nozzle groups are arranged and are sequentially distributed from top to bottom.

The invention provides spherical copper oxide water atomization production equipment and a preparation process thereof, and relates to the technical field of copper oxide preparation, firstly, a medium-frequency induction smelting furnace is used for smelting and pre-oxidizing a copper material, and then an atomization tower and a porous rotary damping spray head in the atomization tower are used for carrying out water atomization crushing and oxidation on molten copper; and then a rotational flow dehydrator and an airflow drying tower are used for dehydration and deep oxidation. Copper liquid pollution is prevented through nitrogen whole-process protection and smelting segmented oxidation, the rotating speed of the porous rotary damping spray head is stabilized through wavy concave-convex structure embedment and constant damping design of ball groove bearing balls, and particle aggregation and nozzle deposition are avoided in combination with pulse type intermittent jet flow. The copper oxide powder with high sphericity, uniform granularity and pure surface is obtained, the production efficiency of spherical copper oxide is improved, the service life of a nozzle is prolonged, and energy consumption is reduced.

This invention belongs to the field of oil and gas field wastewater treatment technology, and discloses a treatment system and method for oil and gas field fracturing flowback fluid. The system comprises a de-gelling and flocculation system, a microbubble ozone system, a reverse osmosis interception system, and a bio-enhanced degradation system connected in sequence. The de-gelling and flocculation system receives the raw water to be treated and, through the synergistic effect of chemical de-gelling and physical swirling fields, separates and removes oily substances and suspended solids from the raw water, forming de-gelling permeate. The microbubble ozone system is used to deeply oxidize the de-gelling permeate, forming oxidation permeate. The reverse osmosis interception system is used to desalinate and deeply purify the oxidation permeate, forming reverse osmosis permeate. The bio-enhanced degradation system is used to degrade biodegradable pollutants in the reverse osmosis permeate to obtain system effluent. This invention achieves the comprehensive goal of a compact process and stable effluent that meets standards for reuse or discharge through a closed-loop treatment path of progressive pollutant reduction and differentiated purification.

The utility model discloses a kind of semiconductor polishing liquid anti-deposition devices, including the storage tank for storing semiconductor polishing liquid, the side surface of the storage tank is equipped with circulation conveying component for semiconductor polishing liquid circulation, rotating drive component is installed on the position of the storage tank and corresponding the circulation conveying component, the bottom of the storage tank is also equipped with agitating component for semiconductor polishing liquid agitation, the circulation conveying component includes fixedly connected in the bottom of the side surface of the storage tank circulation pump, conveying pipe is installed on the circulation pump, rotatable annular pipe is connected to the other end of the conveying pipe.The utility model is by circulation pump and is sent to annular pipe by conveying pipe in the storage tank polishing liquid and is evenly sprayed by spray head, positive and negative rotation motor drives driving link to make annular pipe reciprocating rotation expand spraying range, while agitating motor drives agitating blade to agitate the polishing liquid in the storage tank, ensure its uniform distribution.

This utility model discloses a nickel plating reactor for diamond micron powder, comprising a reactor and an oil storage tank. The reactor has a jacketed structure, and a detachable lid is provided on the top of the reactor. A stirring element is provided on the lid, and a temperature regulating element is provided between the oil storage tank and the jacket of the reactor. This utility model belongs to the technical field of reactors, specifically referring to a nickel plating reactor for diamond micron powder.

The utility model discloses a mixing device for producing a water-soluble fertilizer. The mixing device comprises a mixing barrel, a mounting unit and a filter tube bottom, a main stirring rod is rotationally connected to the middle of the mixing barrel, stirring blades are arranged at the lower end of the main stirring rod, a feeding hopper is arranged at the upper end in the mixing barrel, a filter pipe is arranged at the lower end of the feeding hopper, an auxiliary stirring rod is rotationally connected to the upper end in the mixing barrel, and the lower end of the auxiliary stirring rod penetrates through the feeding hopper and extends into the filter pipe; uniformly distributed stirring blades are arranged at the lower end of the outer arc surface of the auxiliary stirring rod; the filter tube bottom is positioned below the filter tube; according to the mixing device for water-soluble fertilizer production, solid raw materials can be limited on the upper layer through a filter screen structure and discharged along with dissolution, deposition of the raw materials at the bottom is avoided, the mixing efficiency of the raw materials can be improved, meanwhile, insoluble impurities can be collected through the bottom of the filter pipe, and the impurities can be conveniently taken out and separated; the production efficiency and the production quality of the water-soluble fertilizer are improved.

The utility model discloses an industrial sewage treatment aeration grit chamber capable of preventing sediment deposition, which comprises a chamber body, the chamber body is of a rectangular structure with an opening on the side surface, an air pipe is arranged on the inner wall of one side of the chamber body, an aerator is arranged on the surface of the air pipe, and the aerator is communicated with the air pipe. A plurality of air pipes and aerators are arranged on the inner wall of one side of the pool body in parallel, a sand collecting groove is formed in the lower surface of the interior of the pool body, and the section of the sand collecting groove is trapezoidal. According to the industrial sewage treatment aerated grit chamber capable of preventing sediment deposition, the inner wall of the grit collecting tank is provided with a grit scraping plate, the two sides of the grit scraping plate are both provided with connecting ropes, the first connecting rope on one side is driven by an impeller and drives the grit scraping plate to move towards the water outlet section when the device operates, and the second connecting rope on the other side is driven by a gear and drives the grit scraping plate to move towards the water outlet section when the device operates. When the device discharges sand, the sand scraping plate is driven to move towards the water inlet section, and reciprocating motion of the sand scraping plate in the sand collecting groove is achieved.

A kind of sand type rod oil well pump supporting sealing device, the upper portion of leather cup supporting connector is connected in the lower portion of oil string, double-channel supporting leather cup spindle assembly, sand pipe, plug is sequentially connected, the upper portion of double-channel supporting leather cup spindle assembly is connected in the lower portion of rod oil well pump oil inlet valve, the middle portion of double-channel supporting leather cup spindle assembly is installed in leather cup supporting connector, double-channel supporting leather cup spindle assembly is sealed with leather cup supporting connector, the outer diameter of double-channel supporting leather cup spindle assembly, sand pipe, plug is less than the inner diameter of oil string, the outer diameter of sand pipe, plug is less than the inner diameter of leather cup supporting connector, double-channel supporting leather cup assembly has oil inlet channel and sand channel, the upper end of oil inlet channel is communicated with the inlet of rod oil well pump oil inlet valve, the lower portion of oil inlet channel is communicated with oil well casing, the upper end of sand channel is communicated with the annular space between rod oil well pump and oil string, the lower end of sand channel is communicated with the interior of sand pipe.

The utility model relates to the field of riser manufacturing and processing, and discloses a riser die feeding device which comprises a supporting plate, a motor is fixedly connected to the outer side of the supporting plate, a disc is fixedly connected to the driving end of the motor, a linkage shaft is fixedly connected to the outer side of the disc, and a rotating block is fixedly connected to one end of the linkage shaft. A limiting block is rotatably connected to the outer side of the rotating block, a rotating shaft is fixedly connected to the outer side of the limiting block, a rotating rod is fixedly connected to one end of the rotating shaft, rotating plates are fixedly connected to the two ends of the rotating rod, and a raw material barrel is fixedly connected to one side of each rotating plate. According to the utility model, the motor is started, the disc is driven to rotate, the linkage shaft rotates, the rotating block swings under the constraint of the limiting block when the front end of the linkage shaft tilts and rotates, and the raw material barrel finally swings by driving the rotating shaft, the rotating rod and the rotating plate to swing, so that raw materials are shaken, and deposition is prevented.

This invention discloses a high-wear-resistant lubricating oil and its preparation method, relating to the field of lubricating oil technology. The high-wear-resistant lubricating oil, by weight, comprises: 85-92 parts base oil, 3-5 parts shape memory polymer, 2-4 parts metal-based shape memory alloy, 0.05-0.1 parts functionalized graphene, 0.5-1 parts self-cleaning additive, 5-8 parts nickel-titanium-niobium magneto-controlled shape memory alloy, and 2-3 parts phase change heat storage microcapsules. This invention, by compounding the base oil with the shape memory polymer, metal-based shape memory alloy, functionalized graphene, self-cleaning additive, nickel-titanium-niobium magneto-controlled shape memory alloy, and phase change heat storage microcapsules in a specific ratio, compared with existing technologies, can improve the wear resistance life of the lubricating oil under different load and temperature conditions. Therefore, it solves the problem that traditional lubricating oils have large performance fluctuations under varying operating conditions and are difficult to meet lubrication requirements under high and low temperatures and different load conditions.

The utility model discloses a three flow channel runway formula open pool for microalgae culture, including open pool body, the open pool body be equipped with two side -by -side arrangement's partition wall, the partition wall will the space in open pool body divide into three side -by -side's flow channel, respectively two side flow channel and an intermediate flow channel, the both ends of adjacent two flow channels all communicate with each other, be equipped with the stirring paddle for driving microalgae culture solution flow in one end of intermediate flow channel. The utility model discloses the traditional two flow channel of runway formula open pool is improved to three flow channel, can effectively promote the flow rate of microalgae culture solution, reduce the mixed dead area, prevent microalgae deposition, reduce the collapse rate, improve microalgae culture efficiency. Especially suitable for the runway formula open pool of larger scale, reduce the energy consumption of same flow rate.

The utility model relates to the technical field of evaporation concentration, disclose a kind of low-temperature heat pump evaporator structure, including reaction component, the reaction component includes bearing frame, the top of bearing frame is fixedly connected with reaction kettle, the outer surface of reaction kettle is threadedly connected with sealing cover, the top of sealing cover is sequentially provided with raw material liquid inlet and concentrated liquid outlet, the bottom of reaction kettle is provided with steam exhaust port.The utility model is rotated by servo motor drive drive rod in cleaning component, and then drive stirring rod to carry out forced flow disturbance to raw liquid and the structure operation of synchronous rotation scraping heating pipe outer surface with drive rod as center of circle of cleaning rod, drive the forced flow disturbance of raw liquid, ensure that heat is evenly distributed and accelerate evaporation, while periodically scraping heating pipe outer surface, prevent dirt deposition, realize the beneficial effect of improving heat transfer efficiency and reducing shutdown maintenance frequency.Stirring rod three groups evenly distributed optimize the fluid dynamics performance, avoid to produce dead angle or vortex.

The invention discloses an exosome composition containing resveratrol, astragalus membranaceus and ginseng as well as a preparation method and application of the exosome composition, and belongs to the technical field of biological medicines. The exosome composition disclosed by the invention is obtained by inducing alveolar epithelial cells by active ingredients containing resveratrol, an astragalus extract and a ginseng extract and then secreting the alveolar epithelial cells. The preparation method of the exosome composition mainly comprises the following steps: co-culturing the active component and alveolar epithelial cells, and then sequentially carrying out differential centrifugation and ultracentrifugation on the collected cell supernatant to purify the exosome. The invention also provides a pharmaceutical preparation containing the exosome composition. According to the composition, traditional Chinese medicine active ingredients are combined with a modern cell exosome technology, a potential strategy is provided for prevention and treatment of pulmonary fibrosis, and the composition has a good application prospect.

This invention discloses a side-mounted magnetic stirring device and method. The device includes a storage unit, a spherical stir bar placed inside it, and a magnetic stirrer disposed on its outer wall. The spherical stir bar has an embedded magnet, and the magnetic stirrer drives the spherical stir bar to roll and / or rotate through a magnetic field. The outer wall of the storage unit may be provided with a slide rail or guide groove, and the magnetic stirrer can move axially via a slider or roller; it may also include a fixing component and an adjusting screw for connecting the magnetic stirrer and the liquid-pushing piston and adjusting their relative positions. The method includes placing the spherical stir bar inside the storage unit, starting the magnetic stirrer to drive stirring, and making the magnetic stirrer move synchronously with the liquid-pushing piston. This invention requires no modification to the opening, does not occupy bottom space, has no leakage risk, and is easy to assemble and disassemble, making it particularly suitable for tubular liquid storage units with limited bottom space or requiring temporary stirring.