48results about How to "Improve blockage" patented technology

This invention relates to the field of petrochemical technology, specifically to a method and system for dehydrogenating low-carbon alkanes to olefins. The method includes: (1) introducing low-carbon alkanes into a moving bed reaction zone packed with a dehydrogenation catalyst to undergo a dehydrogenation reaction, obtaining dehydrogenation products, and separating the dehydrogenation products to obtain hydrogen, olefins, and alkanes; (2) introducing the spent catalyst flowing out from the bottom of the moving bed reaction zone into a regenerator for regeneration treatment to obtain a regenerated catalyst, and recycling the regenerated catalyst back to the moving bed reaction zone to participate in the dehydrogenation reaction. Using the method provided by this invention, the conversion rate of low-carbon alkanes can be improved, continuous catalyst circulation can be achieved, and the operating cycle of the unit can be extended.

The utility model discloses an anti-blocking rain and sewage diversion pipeline structure which comprises a rainwater diversion box, a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are installed on the two sides of the diversion box, and filter cartridge pieces are arranged on the two sides of the rainwater diversion box. According to the utility model, the two filter cartridges are respectively used for filtering when water is fed and discharged, rainwater can be filtered by the filter element when flowing into the rainwater diversion box, so that the rainwater is prevented from blocking subsequent pipelines, the two filter cartridges and one filter element are convenient to disassemble and assemble, the filter element is convenient to replace, and the rainwater diversion box is convenient to disassemble and assemble. A scraping plate of the annular cleaning piece abuts against the inner wall of the rainwater diversion box and the surface of the filter element, a magnetic suction cleaning ring outside the rainwater diversion box is manually stirred, the scraping plate of the annular cleaning piece can be magnetically driven to rotate and displace, dirt generated in the rainwater diversion box can be rapidly cleaned, the rainwater and sewage filtering capacity of the device is good, the filter element is convenient to replace, and the service life of the device is prolonged. Internal cleaning can be completed without disassembly and assembly, the anti-blocking capacity of the filtering assembly is improved, and operation and use are convenient.

This application discloses a device for treating blockages in cooling wall water pipes. The device includes: a first tee pipe having a fourth, fifth, and sixth pipe, wherein the fourth pipe is connected to the flow channel of the first pipe, the fifth pipe is connected to the flow channel of the third pipe, and the sixth pipe is located between the fourth and fifth pipes; a second tee pipe having a seventh, eighth, and ninth pipe, wherein the seventh pipe is connected to the sixth pipe, the ninth pipe is connected to the second pipe, and the ninth pipe is located between the seventh and eighth pipes; a first shut-off valve located on the eighth pipe for controlling the on / off state of the eighth pipe; and a second shut-off valve located on the ninth pipe for controlling the on / off state of the ninth pipe.

The invention provides a clinical anesthesia support structure convenient to operate, and relates to the technical field of medical instruments. The adjusting part is arranged below the beam tube part; the supporting part is arranged below the adjusting part; the blocking part is arranged above the supporting part; a cylindrical groove is formed in the top of an adjusting plate, connection of a connecting block is facilitated, then stability of a matched restraining block is kept conveniently, a fixing frame is fixed to the adjusting plate, a telescopic frame and an outer clamping frame are fixed conveniently, the telescopic frame and the outer clamping frame stretch out and draw back and turn over while stability is kept, and then the supporting range of the telescopic frame and the outer clamping frame is increased; according to the anesthesia support structure, a plurality of supporting devices are arranged, so that supporting treatment can be conveniently carried out in multiple directions in the operation process, and the problems that for an existing traditional anesthesia support structure, supporting treatment is generally achieved through stretching and retracting of a tubular structure, but due to the fact that the number of tools needed to be laid in the clinical operation process is large, supporting in different directions is inconvenient to carry out are solved.

The utility model discloses a heavy calcium carbonate device of quantitative conveying splashproof material guiding hopper relates to calcium carbonate processing equipment field, including conveying belt, hopper, inclined baffle and rubber elastic sheet, and the core innovation point is the discharge port flow observation window, adjustable quantitative baffle and spliced discharge port splashproof coaming, adjustable quantitative baffle is located in the hopper discharge port inboard, and the effective unloading width is changed through adjustable screw rod, the discharge port flow observation window is equipped with high accuracy horizontal scale to the baffle, and the inboard is coated anti -fog coating, and the spliced discharge port splashproof coaming is 3 detachable cold -rolled steel sheets, and the enclosure forms "U type " splashproof structure. The device solves the defect that the prior art has no quantitative adjustment, no splashproof protection, no flow monitoring, and adapts to heavy calcium carbonate efficient conveying demand.

This invention discloses a method for controlling a blowout in a marine well by drilling through the riser. The method includes the following steps: establishing a working face using scaffolding; pre-positioning the crane vessel, workboat, and guard vessel before the operation; placing the casing drilling equipment, high-pressure pump, fire-fighting equipment, and protective gear on the workboat or wellhead area before drilling; selecting the drilling location and number of holes; pre-installing the riser backplate before drilling the outer riser; drilling the riser, technical casing, and production casing sequentially, confirming the safety of each annulus layer; upon discovering an overflow during drilling, quickly tightening the backplate; and implementing well control operations using heavy brine, barite slurry, or non-dispersible cement slurry. This invention addresses blowout situations in drilling or production wells on offshore platforms. It allows for close deployment of all aspects during emergency rescue, rapid sealing of the outer riser, and connection of the well control manifold to the internal wellbore. This enables successful well control and sealing operations in each annulus layer. The method is highly operable, has a short construction period, and requires minimal investment.

The application relates to a cleaning device. The cleaning device comprises a frame, a cleaning assembly, a hand lever assembly, a water injection assembly and a switch assembly. The cleaning assembly comprises a cleaning roller which is rotatably connected to the frame. The hand lever assembly is connected to one end of the frame which is away from the cleaning assembly. The water injection assembly comprises a water tank and a hose. The water tank is mounted on the hand lever assembly. One end of the hose is connected to the water tank. The hose is partially arranged in the hand lever assembly and partially arranged in the frame, so that one end of the hose which is away from the water tank can inject water into the cleaning roller. The switch assembly is at least partially mounted on the hand lever assembly to realize the conduction or blockage of the hose.

The utility model belongs to the technical field of thermal power equipment, and relates to a high-efficiency combined preheater system of a thermal power plant boiler, which comprises a tubular air preheater arranged at the tail part of the boiler and used for heating primary air and a rotary air preheater used for heating secondary air, flue gas inlets of the tubular air preheater and the rotary air preheater are connected with a flue outlet of the denitration system, flue gas outlets of the tubular air preheater and the rotary air preheater are connected with the dust remover, and a water supply heat exchanger is further arranged between the flue gas inlet of the tubular air preheater and the flue outlet of the denitration system. The rotary preheater can further improve the operation efficiency of a coal power plant, solves the problems of high air leakage, loss and catalyst blockage of a traditional rotary preheater, has the advantages of energy conservation, economy and reliability, and meets the technical requirements of efficient and clean operation of a thermal power plant.

This invention discloses a filtration device for polishing slurry, comprising a bridge-shaped water tank consisting of a drain section and a filter cover, and a filter basket. In use, the filter basket is placed inside the bridge-shaped water tank, with a height difference between it and the arched drain plate of the drain section. A drain pipe passes through a first and second inlet hole to discharge the polishing slurry into the filter basket for filtration. The filtered polishing slurry is then diverted and discharged through the side plates on both sides of the arched drain plate, allowing the filtered slurry to flow along the wall of the flow channel into the flow channel. The arched drain plate raises the height of the middle of the bottom plate of the water tank, thus increasing the passage space for the polishing slurry and air bubbles, effectively improving the problem of foam blockage. Drainage through the side plates on both sides of the arched drain plate reduces the generation and accumulation of air bubbles, while also dispersing air bubbles adhering to the side walls of the flow channel. The filter basket and the bridge-shaped water tank are designed separately, allowing for changes in the filter mesh size according to actual needs and facilitating the removal and cleaning of filter residue.

The invention discloses a water conservancy monitoring device for water conservancy facilities, and relates to the technical field of water conservancy monitoring devices. Comprising a base, and a vertical frame is mounted on the base; a mounting frame is mounted on the vertical frame, a control box is mounted on the mounting frame, and a control module and a power supply module are arranged in the control box; a water level detection mechanism is mounted on one side of the vertical frame; a water quality detection mechanism is mounted on the base; the water quality detection mechanism comprises a detection box, a liquid box and a contact type water quality detection assembly are arranged in the detection box, a probe of the contact type water quality detection assembly is located in the liquid box, the liquid box of the detection box is connected with a pumping assembly, the pumping assembly is used for pumping water into the liquid box, and the liquid box is further provided with a drainage pipe. By arranging the water quality detection mechanism, the water quality detection mechanism can work based on a pumping pump, water is pumped through a pumping pipe and conveyed to the liquid tank, water quality information in the water tank is detected through a contact type water quality detection assembly, and the water is discharged through a drainage pipe after detection is completed.

The invention discloses a high-rare-earth-content low-carbon steel smelting method for improving nozzle nodulation. The technological process comprises BOF-LF-RH two-stage treatment and CC. Key control requirements are as follows: the oxygen content of BOF tapping is less than or equal to 600ppm, the oxygen content of LF is controlled by submerged arc operation, two-stage operation is adopted in RH, vacuum treatment is firstly performed for a period of time, rare earth alloy is added in the vacuum treatment process, a small amount of sulfur lines are fed into molten steel after first vacuum breaking, silicon-calcium-barium alloy is added after 2 minutes, vacuum treatment is performed, and the molten steel stands on a table for casting after second vacuum breaking. According to the invention, nozzle nodulation caused by addition of rare earth in molten steel can be obviously improved, and the number of continuous casting furnaces of low-carbon steel with high rare earth content is more than 7.

The utility model discloses a tunnel concrete side wall anchor rod which is characterized in that slurry discharge holes are formed in the surface of the middle of an anchor head at equal intervals in the circumferential direction, a connecting rod is fixedly installed on the top of the interior of the anchor head, a guide column is fixedly installed in the middle of the bottom end of the connecting rod, and a fixed cylinder is fixedly connected to the bottom end of the guide column. The piston plate and the supporting inclined rod are supported, the positions of the piston plate and the supporting inclined rod are kept unchanged, then when the anchor head is inserted into a wall for tunnel construction, the supporting inclined rod cannot be clamped, meanwhile, the guide column plays a role in guiding the piston plate, and the piston plate slides along the guide column when being impacted by injected concrete grout, so that the anchor head is prevented from falling off. The deformable metal strip can be bent and deformed under stress, then the supporting inclined rod can slide, the end of the supporting inclined rod is inserted into a wall, the stability of the anchor head is improved, the anchor rod is not prone to falling off during installation, and the situation that the anchor rod shakes and is unstable due to impact when grout is injected is prevented.

The invention relates to the technical field of edible mushroom processing, and discloses a circulating type edible mushroom processing smashing device which comprises a rack and a smashing bin, a feeding bin and a screening bin are fixedly installed on the outer wall of the smashing bin, and a discharging bin and a first returning bin are fixedly installed on the outer wall of the screening bin; a spiral feeder is fixedly installed at the end, away from the screening bin, of the first material returning bin. According to the circulating type edible mushroom processing and smashing device, through cooperation of the first material returning bin, the spiral feeder and the second material returning bin, secondary smashing can be conducted on coarse materials, so that automatic circulation of the smashing process is achieved, the smashing efficiency and precision are improved, and through the design of a first flow guide plate and a second flow guide plate, the smashing efficiency is improved. Through the arrangement of the vibrating screen, crushed materials can fall into the front end of the vibrating screen, the crushed materials can be screened more thoroughly, through the design of an inserting block, an inserting groove, a fixing plate and a limiting groove, rapid installation of the compressed air spray head can be achieved, and the compressed air spray head is convenient to overhaul or replace after being used for a long time.

The application discloses a double-layer fool-proof connector system for medium connection in a chemical liquid supply system. The system comprises a liquid supply end connector, a liquid receiving end connector, a mechanical keying structure, a locking structure, a position detection element, an identity recognition carrier, a read-write module, a controller and an actuator. The read-write module reads the medium identity information after detecting that the connection is in place, the controller performs compatibility verification based on the medium identity information, and outputs an interlock enable signal only when the connection is in place, the reading is successful and the verification is passed, to enable the valve to be opened or the pump to be started; an inhibit signal is output or the inhibit state is maintained when the reading fails, the verification fails or the connection in place state is not confirmed. The system can also be provided with a log module, an anti-tampering structure or an anti-drip valve. The system helps to reduce the risk of medium misconnection and misoperation.

The utility model relates to the technical field of dust removal of clinker bins, and discloses a dust removal device on a clinker bin. A conveying pipe fixedly penetrates through the top of a bin body, one end of the conveying pipe is fixedly communicated with a dust removal box, the top of the dust removal box is fixedly communicated with an air outlet, an induced draft fan is installed above the dust removal box, and the air inlet end of the induced draft fan is fixedly communicated with the air outlet; filter cloth is fixedly connected into the dust removal box, and an air inlet mechanism is installed in the bin body. According to the air inlet mechanism, a traditional air inlet mode is improved, a distributed air inlet layout is adopted, the air inlet range is enlarged, dust in different ranges can be conveniently discharged, the dust collection efficiency can be improved, meanwhile, a mounting ring and a dredging rod which can move up and down are adopted, dust blocked in a dust collection opening can be conveniently dredged, and the dust collection efficiency is improved. Normal dust removal in the bin body is prevented from being affected due to blockage of the dust suction opening, cleaning work can be completed without climbing to a high position manually, and the cleaning efficiency is improved.

This application relates to the field of antibody technology, specifically providing a truncated fragment of the African swine fever virus pB602L protein, an antibody thereof, or an antigen-binding fragment thereof, and their applications. The truncated fragment, encoded by SEQ ID NO.1, eliminates mismatched disulfide bonds and repetitive sequences by deleting the first 200 amino acids from the N-terminus, thereby improving protein solubility and immunogenicity. The antibody thereof or its antigen-binding fragment contains the heavy chain variable region shown in SEQ ID NO.2 and the light chain variable region shown in SEQ ID NO.4, exhibiting a blocking rate of greater than 90% against the pB602L protein. This truncated fragment and antibody demonstrate high specificity and sensitivity, and can be used for the detection, diagnosis, and evaluation of vaccine immunization efficacy for African swine fever virus, providing an important tool for the prevention and control of African swine fever.

The present application belongs to the technical field of biological medicine and immunology, and particularly relates to a single-domain antibody targeting human and cynomolgus monkey PD-L1 cross-binding and application thereof. The single-domain antibody has specificity against human and cynomolgus monkey PD-L1, and shows strong binding efficiency in the binding detection with a PD-L1 target protein or a PD-L1 overexpression cell. In the detection of blocking PD-1 / PD-L1 function, part of the single-domain antibodies even show a blocking effect significantly better than Atezolizumab, which confirms that the single-domain antibody prepared by the present application can be used for the diagnosis, treatment and prognosis detection of PD-L1 positive tumors. Meanwhile, the single-domain antibody has cross-binding ability across species, and can be directly used for preclinical pharmacodynamics and safety evaluation, without the need to develop species-specific alternative antibodies, so as to achieve "one target with double effect".

The utility model discloses a rollable extraction type puncher based on porous agar gel, which comprises an extraction type puncher connecting total component, a supporting plate is fixedly connected to the side surface of the extraction type puncher connecting total component, an output plate is arranged on the side surface of the extraction type puncher connecting total component, and the output plate is fixedly connected with the supporting plate. And a piston plate is clamped on the surface of the inner ring of the output plate in a limiting manner. After the device is inserted, a user needs to use and insert a second pull ring, so that the user can block other openings of the output plate so as to ensure the sealing performance of the whole use of the extraction type perforating machine connecting total component, and when the user inserts the output plate, the user needs to screw a knob handle, so that the user can conveniently insert the second pull ring into the output plate. In this way, a user can unscrew a threaded rod on a nut, so that the user can adjust the position of a limiting insertion rod on a connecting lantern ring, and the user can efficiently punch agar gel.

The present application relates to asphalt tail gas treatment equipment, including spray tower, the spray tower includes air inlet pipe, tower body and air outlet pipe, the air inlet pipe is connected with the lower side of the tower body, the air outlet pipe is connected with the top of the tower body, the air inlet pipe is communicated with the air outlet pipe through the tower body, the spray assembly is arranged in the tower body, the fan and the dirty oil purification device are installed at the connection of the air outlet pipe and the tower body, the spray assembly includes water inlet pipe and several spray heads, the water inlet pipe penetrates the side wall of the tower body and is communicated with the spray head, the fan is installed in the air outlet pipe and the tower body, the dirty oil purification device includes base, heat radiation strip and oil absorption material, the oil absorption material is filled in the base, the upper side of the base facing the fan is inclined to the center, a plurality of heat radiation strips are evenly spaced along the inclined direction of the upper side of the base, a plurality of oil leakage holes are arranged between two heat radiation strips. The fan is heated by the dirty oil purification device to prevent the tail gas from being hardened on the fan blade.

The utility model provides a pipeline assembly and a fracturing fluid conveying system, and relates to the technical field of fracturing fluid conveying, the pipeline assembly comprises a first pipeline, a first valve and a pressurization assembly, the first pipeline is provided with a feed port, a discharge port and a pressurization port; the first valve is connected with the first pipeline and is used for opening and closing the pressurizing opening; the pressurizing assembly is connected with the end, away from the first pipeline, of the first valve, and the pressurizing assembly can generate thrust on materials in the first pipeline so that the blocked materials can be discharged out of the discharging port. The anti-blocking device can generate thrust to materials blocked in the pipeline so as to discharge the materials out of the pipeline, blockage clearing is convenient, and time and labor are saved.

The utility model relates to the technical field of ore processing, and discloses ore processing ball-milling equipment convenient for crushing, which comprises a support cover and a base, the outer wall of the support cover is fixedly connected with an outer cylinder, the inner wall of the outer cylinder is fixedly connected with a fixed cylinder, the inner wall of the fixed cylinder is fixedly connected with a spring, and the spring is fixedly connected with the base. A sliding ring is fixedly connected to the outer wall of the spring, a rubber ring is fixedly connected to the outer wall of the sliding ring, the outer wall of the rubber ring is slidably connected to the inner wall of the fixing cylinder, a connecting column is fixedly connected to the upper surface of the sliding ring, an inner cylinder is fixedly connected to the top end of the connecting column, and a driving assembly is arranged on the upper surface of the base. According to the utility model, the supporting cover, the outer cylinder, the fixed cylinder, the spring, the sliding ring, the rubber ring, the connecting column and the inner cylinder are matched with one another, so that the impact force generated by the collision of the steel ball is buffered and absorbed through the elastic element, the abrasion is effectively reduced, the vibration operation noise can be reduced, the stability of equipment is improved, and the service life of the equipment is prolonged.

This application provides a chip cavity packaging structure, relating to the field of semiconductor technology. The chip cavity packaging structure includes a substrate, a chip, a film layer, and a molding compound. The chip is mounted on the substrate, and the chip and substrate are electrically connected. The film layer covers the chip, and the film layer forms a sealed cavity between the chip and the substrate. The molding compound encapsulates the chip and the film layer; a groove is formed on the molding compound, and metal pillars are placed within the groove. The vertical isolation structure formed by the metal pillars has excellent blocking effect on vertically propagating sound waves, preventing signal interference between chips, and also has good heat dissipation characteristics.

The present application provides a kind of ecological purification method for treating aquaculture tail water, and is sequentially provided with multifunctional drainage ditch, ecological oxidation dam, stable sedimentation pond, continuous biological filter pond and composite purification bed along the direction of aquaculture tail water flow.The garbage intercepting device, ecological revetment and buffer zone are arranged in the multifunctional drainage ditch;The ecological weir, ecological frame, fixed pile, water collecting wall and lifting pump are arranged in the ecological purification dam;The floating plant area, multiple interception and purification devices and aeration device are arranged in the stable sedimentation pond;The culture area is arranged in the continuous biological filter pond, and after the water flow passes through multiple aeration biological filter areas, it enters the effluent area uniformly;The composite purification bed includes plants, improved substrate layer, purification layer, filtration and water collection layer, impermeable layer and effluent area.The method can effectively remove the refractory pollutants and toxic and harmful substances in aquaculture tail water, has low construction cost, small land area, low operation and maintenance cost, and the effluent can be resource utilization.

This utility model discloses an explosion-proof drain plug for petrochemical plants, relating to the technical field of plugging devices. It includes a top cover, with a dustproof top plate rotatably connected to the top of the top cover via a damping shaft. An air supply cylinder is fixedly connected to the bottom of the top cover, and a base plate is fixedly connected to the bottom of the air supply cylinder. A plugging airbag is fixedly connected to the outer wall of the air supply cylinder. Two air supply grooves are symmetrically formed at the top of the top cover, and the inner cavities of both grooves communicate with the inner cavity of the top cover. The top cover is equipped with an air supply mechanism for inflating or deflating the inner cavity of the plugging airbag. This utility model, through its air supply mechanism, enables convenient inflation or deflation of the plugging airbag, thereby further improving the efficiency of plugging or de-plugging floor drains.

This utility model provides an impeller sand washing machine, belonging to the technical field of sand washing devices. The impeller sand washing machine includes: a water tank body, an impeller with buckets, and an electric drum. The water tank body is divided into a sand washing zone and a sedimentation zone, separated by a partition. The partition has an outlet for the sand washing zone. The electric drum houses a motor and a reducer, and its two ends are fixed to a support frame on the top of the water tank. The impeller is fitted onto the electric drum and rotates with it. The impeller consists of an impeller hub, flanges, a gear ring plate, an impeller ring plate with filter holes, and blades, forming a multi-bucket structure. The sedimentation zone has an inclined overflow trough with overflow ports on the side walls. This utility model integrates the motor and reducer within the electric drum, achieving direct impeller drive, reducing equipment size, improving sealing and resistance to harsh environments (muddy, humid), extending equipment life, and providing high transmission efficiency with energy-saving and noise-reducing effects. The zoned sedimentation allows useful fine sand to settle and prevent loss, reducing overflow trough blockage.

The application relates to a preparation method of a high-flow reverse osmosis composite membrane based on a finger-shaped structure base membrane and an alginate nanotube separation layer, which comprises the following steps: S1, preparation of a casting solution: the casting solution comprises 15-18 wt% of solid polysulfone, 75-82 wt% of N, N-dimethylformamide and 0.5-9 wt% of a pore former, the above raw materials are uniformly mixed and placed, defoaming and filtration are carried out to obtain the casting solution; S2, uniformly spraying the casting solution on a base membrane and placing, placing the film in a water coagulation liquid to obtain a finger-shaped porous support polysulfone base membrane; S3, coating a binary amine aqueous solution on the finger-shaped porous support polysulfone base membrane obtained in the step S2 and drying; and S4, coating a multi-component acyl halide oil phase solution on the finger-shaped porous support polysulfone base membrane in the step S3 to prepare a composite membrane. The reverse osmosis composite membrane in the application can long-term improve and maintain water flux under the condition of ensuring a relatively optimal desalination rate, so as to improve membrane separation efficiency and reduce operation cost.

The application provides an SCR intelligent ammonia injection control method based on flue cross section NOx flux dynamic zoning, comprising: obtaining the flue gas flow rate and NOx concentration of a preset number of sparse measuring points on the SCR inlet flue cross section, calculating the NOx flux of each measuring point, and generating a continuous distribution of the NOx flux of the whole cross section by using an interpolation reconstruction method; according to the corresponding relationship between the ammonia injection branch and the flue cross section and the continuous distribution of the NOx flux of the whole cross section, the NOx flux proportion of the corresponding area of each ammonia injection branch is calculated, and based on the sensitivity of the proportion of each ammonia injection branch to the load change, the key ammonia injection branch is identified from all the ammonia injection branches; according to the continuous distribution of the NOx flux of the cross section, the NOx flux proportion of the corresponding area of the key ammonia injection branch is dynamically calculated, and the total ammonia injection amount is distributed to each key ammonia injection branch according to the proportion, and the non-key ammonia injection branch keeps a fixed opening, thereby realizing dynamic zoning ammonia injection control.

The invention discloses a layer type waste gas collecting and purifying device, and relates to the technical field of waste gas collecting and purifying, the layer type waste gas collecting and purifying device comprises a base and a waste gas collecting mechanism, the waste gas collecting mechanism is arranged on the outer side of the base, the waste gas collecting mechanism comprises a layer furnace, a shifting plate, a communicating hole, a condensing header pipe and a nitrogen header pipe, the shifting plate is arranged on the inner side of the layer furnace, and the communicating hole is communicated with the condensing header pipe. Condensed liquid impurities converge into a waste liquid box by means of gravity, the maintenance frequency of a filter screen is reduced, the continuous operation duration is prolonged, the purification efficiency is improved, and the multi-layer furnace is adaptive to the mass production working condition by adopting global synchronous transmission, dead-corner-free gas collection of upper and lower stirring plates and independent pressure regulation of the multi-layer furnace. The transmission life is prolonged through two-stage filtration and chain groove protection, assembly and maintenance are facilitated through an integrated connecting plate, oxygen supply and gas collection are integrated through structure synchronization, equipment is simplified, and cost is reduced.

A cosmetic composition for blocking ultraviolet rays, which comprises an oil, an emulsifier, an inorganic-based ultraviolet ray blocking agent, and an aqueous phase portion, the emulsifier comprising a polyglyceryl emulsifier and a sorbitan emulsifier, is excellent in ultraviolet blocking effect, does not irritate the skin, and is excellent in formulation stability.

This application provides an energy-saving heat storage element comprising, from top to bottom: a high-temperature section, wherein a plurality of Venturi tubes are distributed in the high-temperature section, and the gaps between the Venturi tubes are filled with phase change material; a medium-temperature section, wherein the medium-temperature section has a waveform structure; and a low-temperature section, wherein the structure of the low-temperature section is the same as that of the high-temperature section. The high-temperature and low-temperature sections of this application employ a Venturi tube design different from the traditional waveform structure, and the gaps between the Venturi tubes are filled with phase change material, which stores energy. Compared with the waveform structure, the airflow in the high-temperature section is smoother and less prone to blockage, and the pressure upon entering the medium-temperature section is reduced, significantly improving the blockage problem in the medium-temperature section. This application retains the waveform structure of the medium-temperature section, improving heat exchange efficiency while reducing manufacturing costs. In the low-temperature section, this application uses Venturi tubes in conjunction with phase change material to maintain the tube wall temperature above the dew point, thereby effectively suppressing ash condensation caused by low temperatures.