34results about How to "Reduce condensation" patented technology

This invention discloses a method and system for treating landfill leachate stock, belonging to the field of wastewater treatment technology. The method includes the following steps: first, adding an appropriate amount of acid to the landfill leachate and stirring until homogeneous to obtain an acidic solution with a pH value below 1.5; then, adding silicate cement to the acidic solution in one go or in small amounts multiple times, mixing thoroughly, and allowing it to settle until solids precipitate before discharging the liquid to the external environment or transporting it to the next process. The total amount of silicate cement added is 6%-10% of the mass of the acidic solution. This method can simultaneously treat TP, TN, and NH3 in landfill leachate. 3 Removal of -N and COD, TP, TN, NH 3 The removal rate of nitrogen (-N) can reach over 75%, and the COD removal rate can reach over 30%. The levels of recalcitrant organic macromolecules and benzene ring compounds are significantly reduced. The organic matter in the water sample is reduced, and the molecular structures are simpler and smaller, which is beneficial for biological decomposition and utilization. The system has a simple structure, is easy to use, and significantly reduces water treatment costs.

This invention relates to the field of inlet and outlet gas in high-temperature CVD processes, and particularly to a gas node device for a uniform flow chemical vapor deposition reactor. The gas node device includes a suction pipe (1) connected to the interior of a basic annular groove (3), an annular cover (4) arranged on the basic annular groove (3), and multiple dispersion holes (401) arranged on the annular cover (4). This solves the problems of homogenizing fluid flow and reactor temperature distribution in the CVD reactor. This reduces the deposition of byproducts in the reactor exhaust pipe. The flow distribution along the reactor is uniform; the temperature distribution in the reactor is uniform, resulting in increased reactor life due to gas temperature; and the condensation of byproducts in the reactor is reduced.

The application discloses a kind of nano-silica polycarbonate film moisture permeability detection device, it is related to polycarbonate film detection technical field, including water storage tank and adjusting assembly, the top of water storage tank is connected with load disc by one-way valve, and the inside of load disc is placed with lower partition, the top of lower partition is provided with top cover, and the inside of top cover is placed with upper partition, the periphery of load disc is connected with connecting assembly.The application forms multiple independent test chambers by lower partition and upper partition, which makes it possible to place the same sample in multiple different humidity environments simultaneously and efficiently for comparison testing when detecting the moisture permeability of nano-silica polycarbonate film. The humidity environment is accurately generated by the humidifying unit and drying unit, and the mixture ratio of dry and wet gas input into each chamber is flexibly adjusted by the bus adjusting valve, thereby achieving wide-range humidity control.

The utility model relates to the field of electronic cigarette discloses an air switch air channel structure of preventing condensate, including zinc alloy shell, PCB assembly, air adjusting device, POD oil storehouse base and data line storage mechanism, data line storage mechanism includes fixed box, the fixed box in top end fixed setting has micro motor, the micro motor output fixedly covers and sets up one no. In the utility model, the data line does not need to be carried additionally, the problem that traditional data line is lost or forgotten can be effectively avoided, after charging, the micro motor can be started to wind the data line neatly back to the outer end of the first binding roller.

The utility model discloses a paint pen, include: pen tube, pen tube is provided with the accommodation cavity, be provided with ink and stirring part in the accommodation cavity, stirring part is used for the ink is stirred, two pen components, two pen components respectively with the both ends of pen tube are connected, every pen component all includes pen head, and the pen head is used for writing, two ink control components, every ink control component one end with corresponding pen head is connected, and every ink control component other end all sets up in the accommodation cavity, and every pen head's outside all sets up with filter piece, and every filter piece all with corresponding ink control component abuts, and the filter piece is used for filtering ink. The utility model discloses a paint pen can realize single paint pen has two pen heads, and the specification of pen head can set up according to actual need, need not that user prepares many pen head specifications different paint pen, and can reduce ink coagulation, guarantees the even ink.

The utility model discloses an air outlet grille and air conditioner with same, air outlet grille includes the end part muscle strip of extension along the first direction and first air guide muscle strip, and first air guide muscle strip is multiple and interval arrangement along the second direction, and the end part muscle strip is located the outermost side of multiple first air guide muscle strip, and the end part muscle strip and with its adjacent first air guide muscle strip between, adjacent first air guide muscle strip between all define the air outlet channel, and the first direction and the second direction intersect, the surface that the end part muscle strip participates in the definition air outlet channel includes first air guide surface and second air guide surface, and second air guide surface is located the air outlet side of first air guide surface, and in the second direction, second air guide surface is located the side of first air guide surface away from first air guide muscle strip. Through setting the second air guide surface away from first air guide muscle strip of first air guide surface, can reduce the airflow backflow, and reduce the contact of airflow and second air guide surface, thereby reducing the generation of condensation on second air guide surface.

The invention discloses an anti-fog automobile lamp and relates to the technical field of automobile lamps, an automobile lamp shell and an external shell form a double-layer shell structure design, the automobile lamp shell and an automobile lamp body are protected, external damage is reduced, and therefore the service life of equipment is prolonged; the plastic plate is of an inclined structure, the plastic plate can be attached to the inner wall of the external shell conveniently when the automobile lamp shell is placed in the external shell, so that the redundant space between the shells is reduced, the stability of the automobile lamp shell in the external shell is improved, when the automobile lamp shell enters the external shell, extrusion butt joint is carried out on a plate face groove through the fixing assembly, and the automobile lamp shell is prevented from being damaged. The side, close to the connecting end, of the outer portion of the double-layer lampshade is of a straight face design, the other side of the outer portion of the double-layer lampshade is of a micro-curved-surface structure design, the curved-surface side of the double-layer lampshade faces the outside, and the effect of actively breaking water drop film forming is achieved through the curved-surface structure.

The utility model relates to the field of refrigerator waste gas treatment, in particular to a heat storage type incinerator system for refrigerator broken waste gas treatment, which comprises a bag-type dust collector, a heat storage combustion furnace and an absorption tower, the bag-type dust collector is connected to the bottom of the heat storage combustion furnace through a waste gas guide pipe, and a liquid guide pipe is arranged at the bottom of the heat storage combustion furnace; the liquid conduit is connected to the absorption tower, the bag-type dust remover comprises a dust removal chamber and a dust removal barrel, the dust removal chamber is provided with dust removal cloth, the dust removal barrel is mounted at the bottom of the dust removal chamber, the waste gas conduit is connected to the top of the dust removal barrel, waste gas is fed into the heat storage combustion furnace through the blower, and the heat storage combustion furnace is connected to the bottom of the absorption tower through the gas conduit; the absorption tower is provided with a filling layer which is provided with a plurality of filling holes; a liquid sprayer is arranged at the top of the filling layer and is used for spraying a sodium hydroxide solution; the top of the absorption tower is connected with an exhaust chimney through an exhaust conduit. The device has the effect of reducing equipment corrosion caused by waste gas.

A kind of low-carbon cold region natural air admission aerobic fermentation tank device, including air inlet, fermentation tank, the upper portion of the fermentation tank is connected air inlet, air inlet outside has air inlet lip, air inlet inside has air guide pipeline, air guide pipeline inside is connected dust screen, air guide pipeline lower portion is connected air supplement pump, by preheating, the temperature of air admission is promoted to the suitable range of microorganism, improves the decomposition rate of organic matter;Preheating reduces the relative humidity of air, avoids material to be blocked due to excessive wet, and dry hot air promotes material loose, maintains porosity, ensures oxygen diffusion efficiency;By using tank heat preheating, energy self-sufficiency is realized, and operating cost is reduced;Heat production peak is preheated sufficiently, avoid overheating when heat production trough, reduce manual intervention, and carbon footprint is reduced.

The invention relates to the technical field of medical instruments, in particular to an anaesthetic mask which comprises a mask body, an air inlet is formed in the mask body and communicated with a cavity formed by the mask body, an external annular air bag is arranged on the periphery of an opening of the mask body, and a sealing ring piece is arranged on the outer edge of the air bag. The sealing ring piece is made of flexible materials, the thickness of the outer edge of the sealing ring piece is smaller than that of the inner edge of the sealing ring piece, and the sealing ring piece is tightly attached to the skin of a patient. By arranging the external annular air bag and the flexible sealing ring piece, the external annular air bag can be tightly attached to the facial contour of a patient after being inflated, and basic support is provided for sealing; the sealing ring piece is made of silica gel flexible materials, the thickness of the outer edge is smaller than that of the inner edge, a gradually-changed attaching structure is formed, the sealing ring piece can be tightly attached to the skin to reduce gaps, the sealing ring piece can adapt to face curves of different patients, anesthetic gas leakage is effectively avoided, and the health risk of medical staff is reduced.

The present application relates to the field of petrochemical separation, and discloses a stable column coupling enhanced separation device and a separation method, wherein the stable column coupling enhanced separation device comprises a stable column, a vortex tube module, the vortex tube module is composed of a plurality of vortex tube units in series, each vortex tube unit is composed of a plurality of vortex tubes in parallel, the vortex tube unit is provided with a feed pipe and a cold gas collecting pipe, the feed pipe is communicated with the feed end of the plurality of vortex tubes, the cold gas end of the plurality of vortex tubes is communicated with the cold gas collecting pipe, the cold gas collecting pipe of the vortex tube unit is communicated with the feed pipe of the next vortex tube unit in series, the vortex tube module is provided with a hot discharge pipe and a cold discharge pipe, the hot gas end of each vortex tube is communicated with the hot discharge pipe, and the cold discharge pipe is communicated with the stable column. By introducing the vortex tube module composed of a multi-stage series and parallel structure into the stable column, the energy consumption of the system is effectively reduced.

The utility model discloses a valve box for an air conditioner, a refrigerant switching device and a heating and ventilation system, the valve box for the air conditioner comprises a box body and a partition plate assembly, the partition plate assembly is arranged in the box body and divides the space in the box body into an electric cavity and a pipeline cavity, the electric cavity is configured to contain an electric control assembly, and the pipeline cavity is configured to contain a pipeline. The pipeline cavity is configured to contain a pipeline module provided with an electromagnetic valve body; the partition plate assembly comprises a partition plate and a heat preservation structure, the heat preservation structure is fixed to the partition plate, a wire passing hole communicating with the electrical cavity and the pipeline cavity is formed in the heat preservation structure, and the wire passing hole is configured to allow a conductive wire connecting the electric control assembly and the electromagnetic valve body to penetrate through. The hole wall of the wire passing hole is in sealed contact with the outer wall of the conductive wire, and the heat preservation structure can prevent the partition plate from generating condensation.

This invention discloses a C9+ heavy aromatic hydrocarbon lightening catalyst, its preparation method, and its application. The catalyst uses modified ZSM-5 molecular sieve and modified Beta molecular sieve as acid cracking components, and Group VIB and / or Group VIII metals as hydrogenation components. The ratio of acid content inside the micropores to acid content outside the micropores of the catalyst (A...) in / A out The ratio of micropore volume to mesopore volume (V) should be no less than 100, preferably 200-500. micro / V meso The concentration is 1.0~5.0, preferably 1.5~3.5. The method includes the modification process of the ZSM-5 molecular sieve and the Beta molecular sieve, and the kneading and molding process. The catalyst has both long-chain alkylbenzene dealkylation activity and toluene / trimethylbenzene alkyl transfer activity, realizing the lightening of heavy aromatics without the need for external toluene, and effectively avoiding side reactions such as trimethylbenzene disproportionation and aromatic condensation, delaying carbon deposition, and improving the operating cycle of the device.

The utility model provides a three-level evaporator refrigerating system which comprises a compressor, a condenser, a first refrigerating circuit, a second refrigerating circuit and a humidity sensor, the first refrigerating circuit comprises a first throttling device, a main evaporator and a frosting evaporator which are arranged in sequence, and the second refrigerating circuit comprises a second throttling device. The second refrigerating circuit comprises an electromagnetic valve, a second throttling device and a condensation evaporator which are sequentially arranged, the condensation evaporator, the frosting evaporator and the main evaporator are sequentially arranged in the air duct, and the humidity sensor and the electromagnetic valve are electrically connected with the controller. The controller opens and closes the electromagnetic valve based on the detection result of the humidity sensor, when the humidity in the air is high, moisture in the air is separated out and condensed through the condensation evaporator and the frosting evaporator, condensation of water vapor on the main evaporator is effectively reduced, the influence of frost on the heat exchange effect of the main evaporator is remarkably reduced, and the heat exchange efficiency of the main evaporator is improved. And the defrosting interval of the main evaporator is prolonged.

The utility model relates to the technical field of flake ice machine, and disclose a flake ice machine evaporimeter automatic deicing device, including the bottom plate, its characterized in that the bottom plate top is provided with flake ice device, the bottom plate top is provided with connecting device, the flake ice device top is provided with transmission motor, the output of transmission motor is fixedly installed with transmission link, the circumference of transmission link is fixedly installed with rotary base plate, the rotary base plate top rotatory mounting has the ice knife, the inside of flake ice device is provided with evaporation equipment, the top of flake ice device is provided with ice removing device, through the blowing device starting to transmission motor blowing, the air flow of transmission motor around is accelerated and is helpful to more effectively take away the heat around transmission motor and evaporation equipment, reduce the temperature of motor and system, prevent motor overheating, prolong the service life of motor and other components.

This utility model belongs to the field of doors and windows, and specifically discloses an integrated inward-opening window and screen system, including a window frame, a sash frame, and a screen frame. The window frame includes an inner window frame profile and an outer window frame profile, which are connected by a thermal break strip. The sash frame includes an inner sash frame profile and an outer sash frame profile, which are flush with the inner window frame profile and connected by a thermal break strip. The screen frame is located on one side of the outer window frame profile and includes a screen frame profile and a screen sash profile, which are positioned between the outer window frame profile and the screen sash profile. The screen is fixed to the screen sash profile by a pressure strip, and the outer surfaces of the outer window frame profile and the screen frame profile are on the same horizontal plane. This utility model has strong overall structural rigidity and stability, integrates a screen, saves space, and provides better overall thermal insulation performance for the door and window.

The invention discloses a high-integration-level dustproof and waterproof design method suitable for aeromagnetic equipment, and relates to the technical field of aeromagnetic equipment design, and the method comprises the following steps: setting constant-pressure breathing buffer layers inside and outside a cavity based on the gas residual characteristics of the cavity in the aeromagnetic equipment; a slow-speed air pressure exchange channel is formed inside and outside the cavity through the balance membrane with the controllable micropore structure, and dynamic balance of air pressure inside and outside the cavity is achieved. Through the constant-pressure breathing buffer layer and the graded moisture absorption composite film, external moisture is effectively prevented from entering and water vapor is captured, the condensation phenomenon is reduced, the corrosion risk is reduced, and long-term stable operation of equipment is ensured. Meanwhile, the low-thermal-conductivity heat insulation sleeve layer disperses the temperature difference and prevents water vapor condensation, electric field distribution is optimized by combining the anti-seepage plating layer and potential balance coating, the anti-condensation, anti-corrosion and anti-short-circuit capacity of equipment is improved, and long-term reliability and precision under the high-integration sealing condition are guaranteed.

The utility model discloses a pulsator washing machine with a steam generation structure, which comprises a machine body, a cover body is arranged at the top end of the machine body, a pulsator component is arranged in the machine body, a steam control component is arranged at the rear end of the cover body, and the steam control component comprises a mounting bracket and a steam generator arranged on the mounting bracket. The impeller assembly comprises an outer barrel and a washing barrel arranged in the outer barrel, a steam outlet capable of discharging steam upwards is formed in the bottom of the washing barrel, a steam cavity is formed between the outer barrel and the washing barrel, the steam generator is connected with a steam conveying pipe, the steam conveying pipe is connected to the bottom of the outer barrel, a through hole is formed in the bottom of the outer barrel, and the through hole is communicated with the steam cavity. The steam conveying pipe is communicated with the steam chamber through the through hole; the steam sterilization and acarus killing device further comprises a control valve assembly used for controlling opening and closing of the through hole, high-temperature steam can be fully provided for the interior of the washing barrel, the steam utilization rate is increased, and the steam sterilization and acarus killing efficiency is improved.

The utility model relates to the technical field of landfill, and discloses a double-effect condenser pipe for a gas extraction well of a landfill, and a condenser pipe assembly comprises a condenser pipe upper pipe, a condenser pipe middle pipe, a condenser pipe rear pipe and a condenser pipe lower pipe; the device is used for landfill gas water vapor condensation and automatic guide and drainage of condensate water. The condensation pipe upper pipe is connected with an original gas outlet of a gas extraction well pipe on a landfill pile body, and the condensation pipe upper pipe extends upwards to be connected into the condensation pipe middle pipe; the condenser pipe middle pipe extends downwards to be connected into the condenser pipe rear pipe; the connecting part of the middle condensing pipe and the rear condensing pipe is positioned at the lowest point of the middle condensing pipe and the condensing pipe, a tee joint for connecting the middle condensing pipe, the rear condensing pipe and the lower condensing pipe is arranged at the connecting part, and the lower condensing pipe is designed to extend downwards; the double condensation design and the automatic drainage function are matched with each other, water vapor in landfill gas is treated from two stages, condensate water is drained in time, condensation and accumulation of the water vapor in a pipeline are effectively reduced, the pipeline blockage risk is greatly reduced, and it is guaranteed that the landfill gas is conveyed smoothly.

The invention belongs to the technical field of cigarettes, and discloses a cigarette filter assembly and a heating device. The cigarette filter tip assembly comprises a first electrode assembly, a filter tip and a second electrode assembly which are connected in sequence, the first electrode assembly is used for being connected with a cigarette cartridge, and the second electrode assembly is used for being connected with a heating body; wherein the filter tip comprises a filter element, a heating layer arranged outside the filter element in a surrounding mode and outer-layer packaging paper arranged outside the heating layer in a surrounding mode, and the first electrode assembly, the heating layer and the second electrode assembly are electrically connected in sequence. According to the cigarette filter tip assembly and the heating device, due to the fact that the heating layer is additionally arranged outside the filter element, under the heating effect of the heating layer, the temperature in the filter element rises, smoke is not prone to being condensed in the filter element, compared with a filter tip with the condensation condition, obstacles in the filter element are reduced, more smoke is inhaled by a smoker, and the smoke quality is improved. The temperature of the inhaled smoke is closer to the body temperature, meanwhile, due to the fact that the temperature rises, fragrance is released more sufficiently, the layering sense of the fragrance is richer, and the palatability of smoking is improved.

The invention discloses a preparation method and application of a polyester fiber fabric, the preparation method is combined with a polyester fiber padding process, an olefine acid-methyl acrylate prepolymer and a polyurethane coating adhesive are mixed to prepare an anti-condensation finishing liquid, the anti-condensation finishing liquid is impregnated with polyester fibers, and then the polyester fibers penetrate through the interior and the exterior of the polyester fibers to generate acrylic acid water-absorbent resin; the bonding strength of the acrylic water-absorbent resin and the polyester fiber is improved, and the content and distribution uniformity of the acrylic water-absorbent resin in the polyester fiber are improved; the acrylic acid water-absorbent resin can absorb moisture in the environment to form hydrogel, and the hydrogel saturated after water absorption has certain hydrostatic pressure resistance and does not continuously absorb water, so that the effect of preventing water through water (gel) is achieved, the problem that a traditional outdoor tent fabric is prone to moisture condensation in the low-temperature and high-humidity environment is effectively solved, the comfort of a user is improved, and the outdoor tent fabric is worthy of popularization and application. When the weather is clear, the hydrogel releases water, the pores are opened again, and the dynamic balance of waterproofness and ventilation is realized.

The utility model discloses a kind of antifouling structure, camera and electronic equipment, the antifouling structure, for reducing PCB on organic volatile material pollution image sensor, comprising: condensing piece, between PCB and image sensor, condensing piece inside is provided with containing chamber, bottom is equipped with drawing port;Refrigeration part, cold end is connected with condensing piece, for cooling condensing piece makes condensing piece temperature lower than image sensor, to make organic volatile material condense on condensing piece;Wherein, image sensor is located in containing chamber and front end is opposite drawing port, so that its non-drawing face is wrapped by condensing piece, to block organic volatile material diffusion to the volatile path of image sensor.The utility model in, by making organic volatile material preferentially condense on the condensing piece of lower temperature, to reduce organic volatile material volatilization to image sensor, optimize the working environment of image sensor, improve image acquisition quality and service life.

The utility model relates to a humidifying system of a rotary offset press, and belongs to the technical field of paper printing. The humidifying system of the rotary offset press comprises a humidifying chamber, an atomization humidifying system and a uniform air guide mechanism, an inlet and an outlet are formed in the two ends of the humidifying chamber respectively, and the atomization humidifying system is installed on one side of the humidifying chamber; the uniform air guide mechanism comprises an air guide pipe and two convection fan sets, the air guide pipe is fixedly connected to the air outlet end of the atomization humidification system, and the air outlet end of the air guide pipe is fixedly connected and communicated with two air distribution pipes; the atomization humidification system conveys water vapor to the humidification chamber through an air guide pipe and an air distribution pipe, and the two convection fan sets form circulating air flow. Airflow takes away moisture when flowing through the inner wall of the humidifying chamber, and condensation of the inner wall is reduced; the water vapor collides with atomized water vapor in the water vapor spraying area, so that the water vapor is uniformly attached to the surface of paper, rapid wetting is realized, and the humidifying effect is improved.

This invention discloses an anti-backflow control method, an anti-backflow control device, and an air conditioner. The air conditioner casing defines an air outlet, with a first air guide at the outlet. The air conditioner also includes a second air guide, movably disposed outside the air outlet. The anti-backflow control method includes: determining the relationship between the return air temperature and the set temperature when the air conditioner is operating in anti-direct-blow mode; controlling the first air guide to perform left-right airflow when the return air temperature is lower than the set temperature; and determining whether to control the second air guide to move synchronously with the first air guide based on the difference between the set temperature and the return air temperature. Therefore, the anti-backflow control method of this application can prevent backflow in the air conditioner during anti-direct-blow mode, resulting in better temperature uniformity throughout the room, improving the user experience, and reducing the probability of condensation without the need for temperature compensation.

This application relates to the field of proton exchange membrane fuel cell technology, and provides a gas diffusion layer, its preparation method, and its application. The gas diffusion layer includes a substrate layer and a microporous layer disposed on one side of the substrate layer. The substrate layer has stacked carbon fibers with voids between them. The microporous layer permeates into the substrate layer, forming overlapping portions, and partially permeates into the voids formed by the carbon fibers in the substrate layer. The microporous layer has a fluorine content of 12wt% to 25wt%, and the water contact angle difference between the microporous layer and the substrate layer is Δ, where Δ satisfies 0°≤Δ≤5°. This gas diffusion layer not only has good water drainage and permeability, but also, through the stacked arrangement of the substrate layer and the microporous layer, which gives the substrate layer and the microporous layer similar water properties, effectively reduces the condensation of water vapor in the permeate gas within the gas diffusion layer, increases the humidity of the permeate gas, and thus effectively maintains the wettability of the proton exchange membrane fuel cell.

This invention discloses a transmission gear shaft for a planting tray conveying system, belonging to the technical field of transportation equipment. It aims to solve the problems of noise generated by gear disk displacement under force and gear disk corrosion caused by condensation. The transmission gear shaft includes a central shaft, a first spacer, a second spacer, a gear disk, and a hollow shaft. The first and second spacers are fixed to the central shaft, which can limit the displacement of the gear disk under force and reduce noise. The first spacer, the second spacer, and the through holes on the gear disk are coaxial. The clearance fit between the hollow shaft and the central shaft forms an air duct. After the air duct is connected to a fan, it can accelerate the evaporation of condensation on the surface of the central shaft, prevent corrosion at the connection between the gear disk and the central shaft, extend the service life of components, and ensure the stable operation of the planting tray conveying system.

The utility model relates to the technical field of cosmetic mirrors, in particular to an anti-fogging cosmetic mirror which comprises a mirror frame, one side of the mirror frame is connected with a mirror body, one side of the mirror body is connected with an electric heating wire, clamping grooves are symmetrically formed in the two sides of the mirror frame, a suction fan is arranged in the clamping groove in one side, and a blower is arranged in the clamping groove in the other side. An air channel is formed in the mirror frame, air grooves are symmetrically formed in the two ends of the air channel, two sets of first fixing blocks are symmetrically arranged in the clamping groove, the first fixing blocks are connected with first rotating shafts, first rotating frames are connected to the outer sides of the first rotating shafts, and second rotating shafts are connected to one sides of the first rotating frames; and the second rotating shaft is connected with an auxiliary mirror. According to the cosmetic mirror, a self-circulation ventilation structure is formed by arranging the suction fan, the air blower, the air duct and the air groove, water mist is quickly dispersed, the electric heating wire is matched, the surface temperature can be increased by heating the mirror face, water vapor condensation is reduced, and the anti-fog effect is further enhanced.

The utility model discloses an observation window assembly which comprises an observation window body, a switching mechanism and a heat preservation assembly, the observation window body is provided with a window used for observation, the switching mechanism is arranged on the observation window body, the heat preservation assembly is arranged on the switching mechanism, the switching mechanism can switch the heat preservation assembly to a first position and a second position, and the heat preservation assembly is arranged on the switching mechanism under the first position. The heat preservation assembly can cover the outer wall of the window at the first position and can open the window at the second position. The switching mechanism can cover the heat preservation assembly or open the window of the observation window body, when observation is not conducted, the heat preservation assembly can cover the window for heat preservation, the temperature difference between the inside and the outside of the window can be reduced, and therefore gas condensation on the inner wall of the window can be reduced, and when observation is needed, the observation window can be opened for observation temporarily, and the inner wall of the window can be kept clean and convenient to observe. Frequent cleaning is not needed, the window may be broken, when the heat preservation assembly is located at the second position, window breaking impact can be buffered, and safety is good.

The utility model relates to the technical field of petrochemical engineering, in particular to a vacuum tower for a slurry bed residual oil hydrogenation device, which comprises a tower body, a vacuum fourth distributor, a gas stripping distributor and a heavy wax oil line, a plurality of liquid collecting tower plates are arranged in the tower body from top to bottom at intervals, the vacuum fourth distributor comprises a vacuum fourth downward return pipeline and a vacuum fourth downward return distribution pipe, and the gas stripping distributor is arranged in the tower body. The gas stripping distributor comprises a steam inlet pipeline, an annular distribution pipe and two straight rod distribution pipes, the annular distribution pipe is arranged on the inner side wall of the tower body, and the two straight rod distribution pipes are arranged in the middle of the tower body. According to the device disclosed by the utility model, the two vacuum four-down-return distribution pipes are arranged, so that the vacuum four-down-return quantity is increased, the spraying effect is improved, the feeding temperature is reduced through a heavy wax oil line, slurry is diluted at the first time, the thermal stability of asphaltene is improved, and the probability of blockage of a gas stripping filter is reduced; and the tower bottom material retention time is shortened.

The utility model relates to an aerosol generating system, an aerosol generating device and a heating assembly. The aerosol generating system comprises an aerosol generating device and an aerosol generating article. The aerosol generating article comprises a medium section and a first functional section located at the downstream end of the medium section. The aerosol generating device comprises a heating assembly, which comprises: a base tube comprising a heating section and a first extension section located at the downstream end of the heating section; and a heating layer arranged on the heating section. The first extension section is configured to wrap at least part of the first functional section. When the heating layer is powered and heated, the heat generated by the heating layer can be transmitted to the first functional section through the first extension section, so that the temperature of the first functional section is between 60 DEG C and 250 DEG C, and the condensation of aerosol in the first functional section can be reduced.