98results about How to "Improve heat transfer performance" patented technology

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

The utility model belongs to the technical field of heat tracing cable, and disclose a kind of winding type mounting bracket for pipeline electric heat tracing heating cable, including heat conduction plate, two rows of jack for threading heat tracing cable are provided between the front and back sides of heat conduction plate, the top and bottom of heat conduction plate are integrally formed with multiple arc heat conduction sheets side by side, and heat conduction sheet and jack are one-to-one correspondence, the left and right ends of heat conduction plate are all equipped with mounting ring, and the side of two mounting rings opposite each other is all structured with annular groove, two arc-shaped pieces are symmetrically slidably inserted in the inner side of annular groove, and arc-shaped rod is integrally formed between the two arc-shaped pieces, and the side of arc-shaped piece away from mounting ring is connected with mounting piece. Through the above scheme, the existing device can effectively fix the position of cable to avoid heat tracing cable loosening and affect heat transfer effect, but in order to play good heat transfer effect, it is necessary to fix multiple heat tracing cables, and it is more wasteful of electric energy.

The present application relates to a kind of equipment and method for producing cyclohexanone by oxidizing cyclohexene with adipic acid production exhaust gas, raw gas A containing nitrous oxide in adipic acid production line is entered into raw gas A storage tank, then enter the deoxygenation device of pressure swing adsorption and remove oxygen, enter raw gas B storage tank, enter adipic acid production exhaust gas measuring tank;Through nitrogen tank, cyclohexene measuring tank, adipic acid production exhaust gas measuring tank, high-pressure heat exchanger, high-pressure preheater, fixed bed reactor, high-pressure cooler, high-pressure separator, deep cooling gas discharge tank and low-pressure separator processing generates cyclohexanone.The main purpose product cyclohexanone is generated, the selectivity of cyclohexene to cyclohexanone is greater than 98.0%, the conversion rate of nitrous oxide is greater than or equal to 99.9%, the exhaust gas containing nitrous oxide in adipic acid production line is only treated by removing oxygen, other gases contained do not need to be separated, the gas part of process device high-pressure separator refluxes in certain proportion, more stable.

The application discloses a SiC reactor for cyclohexanone aminooxidation and a design method thereof, and relates to the technical field of chemical reactors. The SiC reactor comprises a reactor shell, a plurality of reaction channels, a plurality of composite plates, and a plurality of reaction channels. The axis direction of the reaction channel is parallel to the axis direction of the reactor shell. The plurality of composite plates are arranged in the plurality of reaction channels. The flat plate and the corrugated plate made of silicon carbide are arranged in the axial direction of the reaction channel and matched with the rhombic through-hole structure. The fluid in the reaction channel can be disturbed, the radial diffusion effect of the fluid is improved, and the effective residence time of the fluid is prolonged. Based on the excellent heat conduction performance of silicon carbide and the plate combination structure, the heat exchange between the wall surface and the fluid is strengthened, the temperature field distribution in the channel is optimized, the mass transfer and heat transfer conditions of the material are improved, and the generation effect of cyclohexanone oxime is improved.

The utility model relates to the technical field of lycopene production, in particular to a lycopene production ingredient blending device which comprises a blending box, a heating sleeve barrel is fixedly connected to the upper end of the blending box, a blending tank is fixedly connected to the interior of the heating sleeve barrel, a lifting air cylinder is fixedly connected to the position, located on the right side of the heating sleeve barrel, of the upper end of the blending box, and a connecting plate is fixedly connected to the output end of the lifting air cylinder; through the use of the stirring rod and the filter barrel I, ingredients are fully stirred and uniformly mixed at different depths, the stirring efficiency is improved, and meanwhile, the scraping blades fully clean and scrape the inner wall of the ingredient tank along with the rotation of the stirring blades, so that the adhesion of the materials is prevented, the mixing effect is improved, the heat transfer is promoted, and blended mixed liquid flows into the filter barrel II; the first filtering barrel rotates to drive the second filtering barrel to rotate synchronously, centrifugal force is generated to conduct double filtration on mixed liquid, the filtering precision is high, and the product quality of lycopene is effectively improved.

The application discloses a rotary air preheater with a multilayer annular heat pipe, relates to the technical field of air preheating, and comprises an outer shell, an inner rotor, a center cylinder, a flue gas inlet, an air outlet, a flue gas outlet, an air inlet, a disturbance mechanism, a ring pipe group, a driving piece and a corrugated plate group. The center cylinder is coaxially arranged at the center position in the outer shell, the inner rotor is rotationally arranged on the outer wall of the center cylinder, the outer wall of the inner rotor is rotationally connected with the inner wall of the outer shell, the inner rotor is driven by the driving piece located at one side of the outer shell, the flue gas inlet and the air outlet are formed in the top end of the outer shell, and the flue gas outlet and the air inlet are formed in the bottom end of the outer shell. The corrugated plate group and the ring pipe group are arranged in the inner rotor, and a plurality of disturbance mechanisms are circumferentially arranged on the inner wall of the ring pipe group. The flue gas and the air are transversely washed to the annular heat pipe, the heat exchange coefficient of the flue gas and the air is strengthened, the deposition rate and deposition amount of ammonium bisulfate on the heated surface can be significantly slowed down, and the safety risk is reduced.

A heat dissipation structure of a cooling plate for a power semiconductor module, the present heat dissipation structure comprising a power chip, a first solder layer, a copper-clad ceramic substrate, a second solder layer and a cooling plate body, which are sequentially arranged from top to bottom. The heat dissipation structure further comprises a straight rib mechanism and a pin rib mechanism, wherein the straight rib mechanism is arranged on a bottom surface of the cooling plate body, and the pin rib mechanism is arranged on the surface of a straight rib mechanism. The heat dissipation structure overcomes the defects of a traditional flat-plate cooling plate, effectively increases the convection heat exchange coefficient and heat dissipation area of the fluid-solid contact surface, increases the transferred heat caused by the macroscopic flow of the fluid and the delivered heat generated by the heat conduction of molecules in the fluid, enhances the heat dissipation performance of the power semiconductor module, improves the thermal reliability of the power semiconductor module, and prolongs the service life thereof.

The invention discloses a chlorine-containing pyrolysis oil radial moving bed reaction adsorption dechlorination hydro-conversion method, and belongs to the technical field of chlorine-containing oil product hydrotreatment and refining. According to the method, chlorine-containing pyrolytic oil is sequentially subjected to fixed bed selective hydrogenation, radial moving bed reaction adsorption dechlorination and fixed bed deep hydrofining reactor treatment; the radial moving bed is filled with a core-shell structure reaction and adsorption integrated catalyst, the core is a hydrodechlorination active component, the shell mainly adopts zinc oxide to adsorb HCl and is fixed in situ, and meanwhile, online addition and discharge of the catalyst are realized through the radial moving bed. According to the invention, poisoning of chlorine to the catalyst is effectively inhibited, the corrosion risk of equipment is reduced, shutdown of the device is avoided, the dechlorination efficiency is improved, the continuous operation period is prolonged, efficient, stable and economical hydro-conversion of the chlorine-containing pyrolytic oil is realized, and the obtained product can be used as clean fuel oil or a chemical raw material.

The application provides an aluminum vapor cavity liquid wick and a preparation method thereof, and relates to the technical field of electronic chip heat dissipation. The preparation method of the aluminum vapor cavity liquid wick comprises the following steps: preparing a porous MAO ceramic film layer on the surface of an aluminum base, significantly increasing the bubble nucleation site density and the corrosion resistance of the aluminum surface; loading FeCo nanoparticles on the surface of the porous MAO ceramic film layer through a self-assembly method, and enhancing the catalytic performance of the surface; and preparing a CNTs coating with a vertical FeCo CNTs array on the surface of the porous MAO ceramic film layer through a chemical vapor deposition method, so that the CNTs coating has the advantages of a high aspect ratio and small pores, the capillary wicking effect is increased, and liquid rewetting is promoted. The aluminum vapor cavity liquid wick with the FeCo CNTs / MAO composite coating on the surface of the aluminum base is prepared, and the composite coating can exert the advantages of the MAO layer and the CNTs coating, and synergistically enhance the heat transfer efficiency and the boiling heat transfer stability of the surface of the aluminum vapor cavity liquid wick.

The utility model discloses an adsorption type heat pump system directly driven by steam. The adsorption type heat pump system comprises a first adsorption bed, a second adsorption bed, an evaporator, an ammonia circulation pipeline and a condenser, the first adsorption bed is communicated with the second adsorption bed through a throttling valve, and the other end of the first adsorption bed and the other end of the second adsorption bed are communicated with an ammonia circulation pipeline through a two-position four-way reversing valve to form an adsorption bed heat exchange fluid loop; the first adsorption bed is connected with the evaporator and the condenser through a vacuum valve; the second adsorption bed is connected with the evaporator and the condenser through a vacuum valve; the evaporator is connected with an external heat source, and the condenser is connected with the first cooling tower. According to the system, ammonia is used as a heat exchange medium of the adsorption bed, isothermal adsorption and desorption of the adsorption bed in the adsorption and desorption process are achieved through latent heat transfer of isothermal evaporation / condensation, the temperature gradient of the adsorbent in the working process is reduced, the heat transfer temperature difference is small, and the adsorption and desorption rate of the adsorbent and the operation stability of the system are effectively improved.

The invention relates to the technical field of industrial heating furnaces, and discloses a skid-mounted electric conduction oil boiler which comprises a bottom frame, a first shell is fixedly connected to the top of the bottom frame, a support is fixedly connected to the inner wall of the first shell, and a heating assembly is fixedly connected to the inner wall of the support. The circulation sectional area of an oil way is reduced, heat conduction oil flows through the annular channel closer to the heating pipe in a concentrated mode, and therefore the average heat transfer distance from the surface of the heating pipe to most oil liquid is shortened, and the problems that in traditional large-space heating, due to the fact that the distance between the oil liquid and a heat source is too long, heat resistance is increased, and heating efficiency is low are effectively solved. And meanwhile, the two internal threaded rings are utilized to guide oil liquid to spirally advance, so that a laminar flow boundary layer which is not beneficial to heat transfer is destroyed, an effective path of the oil liquid in a high-temperature heating area is prolonged, the retention time of the oil liquid in the high-temperature heating area is prolonged, and the overall heat efficiency of the heating device is improved.

The utility model discloses a kind of air-conditioning gas compressors of high efficiency heat dissipation, it is related to gas compressor technical field, and it includes: air compressor;Face expanding mechanism, it is equipped with two groups, two groups face expanding mechanism are all located on air compressor, to increase the contact area of air compressor and outside, each group face expanding mechanism includes laminating plate and multiple face expanding teeth, laminating plate is wrapped and set on the outer surface of air compressor, multiple face expanding teeth are equidistant fixedly connected on laminating plate;Butt joint mechanism, it is equipped with two groups.The air-conditioning gas compressor of high efficiency heat dissipation, by the use of face expanding mechanism, can increase the outer surface area of air compressor, improve the effect of heat transfer, improve the cooling effect in the use process of air compressor, ensure use, the air-conditioning gas compressor of high efficiency heat dissipation, by the use of liquid cooling mechanism, can be circulated, reduce the temperature of face expanding tooth, ensure the temperature in the use process of air compressor, and simple structure, easy to use.

A fluctuating steam thermal storage and heat exchange device and method are disclosed. The device includes a tank, a heat exchanger, and a spraying device. The spraying device is located in the upper part of the tank, and the heat exchanger is located in the lower part of the tank. The bottom of the tank is connected to the spraying device via an upper pipe section through an upper circulation inlet, and to the middle of the tank via a lower pipe section through a lower circulation inlet. A circulating water pump is installed on the lifting pipe. A steam inlet is provided on the tank between the spraying device and the lower circulation inlet. This invention also provides a thermal storage and heat exchange method based on this fluctuating steam thermal storage and heat exchange device. This invention can solve the problem of recovering and utilizing intermittent polluted steam, and produces clean, high-temperature secondary water that can be used for power generation or winter heating.

The utility model belongs to the technical field of flame guns, and particularly relates to a flame gun head which comprises a gun body and a preheating piece, one end of the gun body is provided with a connecting portion used for being connected with an air source, and the other end of the gun body is provided with a gun barrel. The preheating part is connected to the side, close to the gun barrel, of the gun body and comprises a flow guide pipe, and the flow guide pipe is used for enabling fuel fluid entering the gun body to surround the inner wall of the gun head by a circle and then enter the gun barrel; according to the design, fuel fluid is guided into the gun barrel after being subjected to heat transfer at the gun head to eliminate tiny liquid beads, potential safety hazards caused by the fact that the tiny liquid beads enter the gun barrel are effectively avoided, the flow guide pipe surrounds the inner wall of the gun head by a circle, the heat transfer effect on the fuel fluid can be improved, and it is guaranteed that the tiny liquid beads possibly existing in airflow are vaporized; and the use safety and reliability of the flame gun are improved.

The invention discloses a biogas slurry multi-stage thermal cracking system and a waste heat recovery method. The system comprises a feeding pump, a waste heat exchange device, a first-stage thermal cracking device, an interstage reheating device, a second-stage thermal cracking device and a tail gas spraying device which are sequentially connected through pipelines, the method comprises the following steps: pressurizing biogas slurry and then preheating the biogas slurry through a waste heat exchange device; carrying out low-temperature hydrolysis at 110-150 DEG C in a primary thermal cracking device to generate amino acid and reducing sugar and reduce the viscosity; rapidly heating to 160 DEG C to 180 DEG C through an interstage reheating device; the mixture enters a secondary thermal cracking device to be subjected to a high-temperature humification reaction, and a humic acid-like substance is generated; after reaction, high-temperature slurry returns to the waste heat exchange device to release heat, and a finished product is discharged after cooling. Through graded temperature control and countercurrent flow heat exchange, the content of humic acid in the product is increased, the problem of scaling of the heater is solved, the waste heat of the system is recycled to the maximum extent, and the method is suitable for resourceful treatment of the biogas slurry.

The application provides a phase change heat storage composite superhard abrasive grinding wheel, which comprises a grinding wheel base and abrasive materials arranged on the outer periphery of the grinding wheel base. An annular cavity is arranged on the near-outer end region of the grinding wheel base. A heat dissipation fin is arranged in the annular cavity. The inner end and both side ends of the heat dissipation fin are in contact with the grinding wheel base. The outer end of the heat dissipation fin extends to the outer wall surface of the annular cavity but does not contact the outer wall surface. The outer wall surface of the annular cavity is provided with a layer of foamed metal. A working medium is injected into the annular cavity. The phase change heat storage composite superhard abrasive grinding wheel has the advantages of high heat transfer coefficient, large heat capacity, good structural strength and effective regulation and control of the temperature of the grinding arc region.

The invention provides a boiler device for waste heat recovery, which relates to the field of waste heat recovery and comprises a boiler body, and a tube bundle heat exchange mechanism and a rotary heat tube mechanism which are connected in sequence. The tube bundle heat exchange mechanism is provided with a first tube bundle arranged in the flue gas channel; a smoke inlet of the rotating heat pipe mechanism is communicated with a smoke outlet of the pipe bundle heat exchange mechanism, and a rotating shaft with a second pipe bundle and a built-in heat pipe is arranged in the rotating heat pipe mechanism. And the flue gas backflow mechanism communicates the flue gas outlet of the rotary heat pipe mechanism with the hearth through a backflow pipeline and a fan. The self-cleaning mechanism comprises a flow guide plate arranged on the inner wall of the shell, a scraping plate which is fixed on the rotating shaft and is in contact with the flow guide plate, and an ash bucket at the bottom. Efficient and lasting waste heat recovery is achieved through heat exchange combination of the rotary heat pipe and the pipe bundle; the self-cleaning mechanism automatically removes dust; the flue gas backflow mechanism regulates and controls low-temperature flue gas to return to the hearth, and deep energy recovery is achieved. The system integrates monitoring and safety mechanisms, operation controllability and stability are guaranteed, and the heat efficiency of the boiler is integrally improved.

This invention provides a heat exchanger and an air conditioner. The heat exchanger includes: a heat exchanger body, on which a condenser inlet manifold and a condenser outlet manifold are provided; multiple refrigerant inlets and multiple refrigerant outlets, the multiple refrigerant inlets and outlets being located on the heat exchanger body, and the multiple refrigerant inlets being connected to the condenser inlet manifold; wherein the number of multiple refrigerant inlets is greater than the number of multiple refrigerant outlets. Embodiments of this invention increase the mass flow rate of the refrigerant in the low dryness zone, thereby improving the heat transfer effect.

The invention provides a silicon-carbon composite material as well as an appearance evaluation standard and application thereof, and relates to the technical field of battery negative electrode materials. The silicon-carbon composite material comprises sphere-like silicon-carbon particles, and each sphere-like silicon-carbon particle comprises a silicon-carbon plane and a silicon-carbon transition cambered surface adjacent to the silicon-carbon plane; and the minimum value of the curvature of the cambered surface infinitesimal element of the silicon-carbon transition cambered surface at the joint of the silicon-carbon transition cambered surface and the silicon-carbon plane is 0. The material is of a sphere-like structure containing a plane and an adjacent transition cambered surface, the structure and a base body can form three-dimensional interlocking, mechanical binding force is enhanced, interface crack propagation is restrained, particles can be promoted to be directionally arranged to form regular and uniform slit-shaped channels / pores, the compression resistance and abrasion resistance of the material are improved, the stacking density is increased, and the contact area is increased. And the silicon-carbon composite material has excellent electrochemical performance. The shape evaluation standard represented by the polyhedron degree Q (0-1, the closer to 1, the closer to an ideal polyhedron) is provided, the problem that the shape of an existing polyhedral material lacks a unified evaluation standard is solved, a scheme is provided for similar polyhedral material evaluation, and material design, screening and application are promoted.

An oil-rich heating furnace device circularly heated by high-temperature flue gas comprises a heating furnace body, a combustor for heating, a combustion-supporting air pipeline, a furnace top flue gas pipe arranged on the upper portion of the heating furnace body, an air preheater, a flue gas discharge chimney and an oil-rich conveying pipe arranged in a furnace cavity. The device is characterized in that the center of the furnace body is provided with a high-temperature flue gas injection guide cylinder and a rich oil delivery pipe surrounding the outer ring of the high-temperature flue gas injection guide cylinder; the burner for heating is arranged on the inner hearth wall at the lower part of the heating furnace body; the bottom of the hearth is provided with an in-furnace flue gas circulating channel which is formed by an out-furnace circulating hot air pipeline and a furnace top flue gas pipe at the upper part of the heating furnace body; an air pipeline, a hot air pipeline, a flue gas discharge chimney and an in-furnace combustor on the two sides of the air preheater form an out-furnace preheated air conveying channel capable of utilizing the flue gas discharge chimney to preheat; therefore, the closed furnace internal and external circulation heating system capable of continuously heating rich oil flowing through the conveying pipe of the in-furnace rich oil disc is formed.

The application discloses a transcritical CO2 air source heat pump system and a control method thereof. The transcritical CO2 air source heat pump system comprises a carbon dioxide compressor, a gas cooler, an electronic expansion valve, an outdoor fan, a cold storage device, a heat storage water tank, a high-temperature heat accumulator, a low-temperature heat accumulator and a floor buried pipe heat exchanger. The gas cooler comprises a first working medium pipeline and a first heat exchange pipeline for realizing heat exchange. The cold storage device comprises a second working medium pipeline and a second heat exchange pipeline for realizing heat exchange. The heat storage water tank comprises a hot end heat exchange pipeline and a cold end heat exchange pipeline for realizing heat exchange. The transcritical CO2 air source heat pump system can be controlled to be in various working conditions, such as single hot water production, refrigeration and hot water production, single heating, heating and hot water production and the like, by controlling the opening and closing of each component and valve, and is integrated and multipurpose to adapt to different requirements.

The embodiment of the invention provides a high-temperature heat storage-supercritical steam generation system. The high-temperature heat storage-supercritical steam generation system comprises a heat storage body, a supercritical steam generation unit connected with the heat storage body and an intelligent control unit connected with the supercritical steam generation unit. The heat storage body comprises a solid waste-based graded porous carrier and fused salt filled in gaps of the solid waste-based graded porous carrier; the supercritical water vapor generating unit comprises a water vapor generator with a built-in spiral metal pipe and a multi-stage heat exchange runner; the intelligent control unit comprises a digital controller, an axial-flow compressor and a heat exchange pump, the digital controller is connected with the axial-flow compressor, the heat exchange pump and the heat storage body, and the digital controller is configured to dynamically adjust the running states of the axial-flow compressor, the heat exchange pump and the heat storage body.

This invention discloses a jet microchannel heat sink, comprising a shell, which is divided into a lower microchannel layer and an upper jet generating layer by a layered plate. Several pairs of first ribs are spaced apart in each microchannel to enhance the disturbance of the fluid on the wall and near the jet orifice. A pair of second ribs is also provided between adjacent first ribs to disturb the fluid between adjacent jet orifices, resulting in a higher fluid velocity near the second ribs and helping to reduce the temperature in the middle region between adjacent jet orifices. The jet generating layer also includes several jet dispersing ribs to disturb the fluid flowing in through the jet inlet, solving the problem of uneven jet distribution. Furthermore, the structure of this invention can incorporate crossflow, and by improving the jet orifice diameter distribution, the fluid in the latter half of the microchannel still has a high velocity after the crossflow mixes with the jet, carrying away more heat and making the temperature distribution of the microchannel more uniform.

This invention relates to the field of plate heat exchanger technology, and discloses a plate heat exchanger core and a plate heat exchanger, comprising: a base and raised units. Several raised units are arranged in a fish-scale pattern on the base; each raised unit includes a guiding surface and a turbulent surface, which are arranged along the flow direction of the heat exchange fluid, and the guiding surface is connected to the turbulent surface. Through this arrangement, the guiding surface reduces flow resistance and ensures smooth fluid flow, while the turbulent surface generates high-intensity turbulence, achieving excellent heat exchange performance while reducing resistance and pumping energy consumption. By setting up the fish-scale pattern of raised units, the vortices generated by the turbulent surface of each unit can continuously act on its downstream region, avoiding the flow calm zone that may exist in traditional symmetrical raised units, thereby maintaining a high heat transfer rate across the entire heat exchange plate.

The utility model discloses a tower for recycling a tetrabromobisphenol A wastewater solvent, and belongs to the technical field of tetrabromobisphenol A. The tower for recycling the tetrabromobisphenol A wastewater solvent comprises a flash tower body, the flash tower body comprises an upper tower body, a middle tower body and a lower tower body, one side of the upper tower body is communicated with a feeding pipe, and the other side of the upper tower body is communicated with a discharging pipe. A spraying part is mounted at the bottom end of the feeding pipe, the middle tower body is provided with a filler layer, and a circulating part is mounted at the bottom end of the lower tower body. According to the device, the contact area of wastewater and the filler layer is increased through the spraying part, so that the wastewater is more uniformly contacted with the filler layer, the heat transfer effect is enhanced, the heat utilization rate is further improved, the steam consumption is reduced, the energy utilization efficiency of the whole process is improved, and continuous feeding and discharging can be realized during working through cooperation of the circulating part; the automation degree is high, the use amount of energy is reduced, and the cost is reduced.

The application relates to the technical field of heat exchange, in particular to a high-efficiency shell-and-tube heat exchanger and a preparation method thereof. The high-efficiency shell-and-tube heat exchanger comprises a shell, a head assembly, a tube bundle assembly, a first flow control assembly, a second flow control assembly, a first fixing assembly and a second fixing assembly. The tube bundle assembly, the first flow control assembly and the second flow control assembly are arranged along the depth direction of the shell, the tube bundle assembly penetrates through the first and second flow control assemblies and is in sliding connection with the first and second flow control assemblies, and a pitch adjusting assembly in the shell can adjust the distance between the first and second flow control assemblies. The liquid inlet part and the liquid outlet part are diagonally distributed, the first and second flow control assemblies are combined to guide the fluid flow, and a pressure stabilizing part and a heat conduction assembly are arranged. The tube bundle assembly adopts a multi-stage variable-diameter design, and the second fixing assembly comprises a flow collecting piece and a fixing piece. The above scheme avoids the mixing of the tube-side medium and the shell-side medium, reduces the thermal expansion coefficient of the connection part and stress concentration, solves the problem of uneven heat transfer efficiency caused by uneven distribution of the shell-side fluid, and improves the temperature uniformity of the heat exchanger and the heat exchange efficiency.

The invention belongs to the technical field of radar system cooling and discloses cooling liquid for a radar system as well as a preparation method and application of the cooling liquid. The cooling liquid comprises base oil and an additive, and the base oil comprises 80-100 wt% of paraffin-based mineral oil and 0-20 wt% of naphthenic mineral oil based on the total weight of the base oil; the weight-average molecular weight of the paraffin-based mineral oil is 250-300 g / mol, and the weight-average molecular weight of the naphthenic mineral oil is 260-320 g / mol. The cooling liquid has the advantages of being excellent in high and low temperature tolerance, high in oxidation stability, good in electrical insulation performance, good in heat transfer performance, good in material compatibility and environmentally friendly, can be used for effective cooling of a radar system and corrosion protection of multi-metal materials and welding flux in the radar liquid cooling system, and is long in service life and suitable for industrial production.

This invention relates to a microribbed jet impact cooling channel for hot-end components of aircraft. It is an integral structure comprising 1 to 100 sub-channels arranged side-by-side, with adjacent sub-channels sharing sidewalls. Each sub-channel includes a main channel, microribs, and jet holes. Fuel enters the main channel from one end and through the jet holes, exiting from the other end. The main channel has a rectangular cross-section. Microribs are arranged at the bottom of the main channel, forming an array of microribs. Jet holes are arranged at the top of the main channel, with uniform or non-uniform distribution. The sidewalls of the main channel are smooth planes. This invention, with its arrayed microribs and jet holes, couples the effects of the microribs and the jet impact, effectively reducing the wall temperature of the scramjet engine combustion chamber without adding extra mass, effectively suppressing the temperature rise of high-heat components in the aircraft, thereby achieving higher Mach numbers.

The utility model discloses a kind of cosmetic plastic bottle injection blow molding production equipment, it is related to plastic bottle technical field.The utility model includes heating bucket, is provided with stirring mechanism and heating mechanism on the heating bucket, the stirring mechanism includes the shaft one rotationally connected in the middle shaft of heating bucket, the bottom of the shaft one is fixedly connected with fixed box, the bottom inner wall of the heating bucket is fixedly connected with the shaft two, the outer wall of the shaft two is fixedly connected with bevel gear one.The utility model is stirred by being provided with stirring mechanism, the fixed movement track of stirring paddle of traditional device, there are more stirring dead angle, it is difficult to realize material fully mixing, and it is difficult to effectively take material and heating element fully contact, not only lengthen heating time, it can also be due to material unevenly heated, when subsequent injection blow molding, uneven wall thickness, bubble, deformation and other quality problems appear, increase scrap rate, it is difficult to meet the production demand of extremely high product quality requirement of cosmetic plastic bottle etc.

The utility model relates to the technical field of electric appliances, and discloses a heater, which comprises a first shell, a heating pipe, a temperature controller and a fuse, a water inlet pipe and a water outlet pipe communicated with an inner cavity of the first shell are arranged on the first shell; the heating pipe is arranged in the first shell, the end of the heating pipe extends out of the first shell, and the heating pipe is of a U-shaped structure. The temperature controller and the fuse are arranged on the first shell; the end part of the heating pipe is connected to an external heating circuit through a temperature controller and a fuse; the temperature controller has an off state when the temperature of the first shell is higher than or equal to a first preset temperature and an on state when the temperature of the first shell is lower than the first preset temperature. The problems that an existing heater is usually large in size, hot water or steam is discharged for a long time, and user experience is affected are solved.