59results about How to "Short heat transfer distance" patented technology

Systems and methods for heat exchange in accordance with the invention define adequately long-interchange distances for two fluids by wrapping a tube containing a first fluid about the wall of an inner cylindrical tank, within a gap formed with a second concentric tank. A second fluid is transmitted in the space defined between the turns of the tube and the two walls, providing effective short length thermal interchange through the tube walls. The tube is in the line contact with both tank walls and the fluids can flow rapidly over an adequately long length, so that high efficiency is provided in a low cost system.

The invention discloses a preparation method of a large-diameter aspheric lens. The preparation method comprises the following steps: (1) making a die kernel and a glass nitrate material; (2) putting the glass nitrate material in the die kernel; (3) putting the die kernel on a die pressing station; (4) vacuum-pumping the station; (5) injecting nitrogen gas into the station; (6) increasing the temperature; (7) enabling the temperature to be uniform; (8) molding by die pressing; (9) annealing; (10) reducing the temperature; (11) discharging the nitrogen gas; (12) taking out the die kernel; (13) taking out a product. The preparation method disclosed by the invention has the benefits that the adjustment of an internal structure of the lens is finished through the relatively-slow temperature reducing process, so that a structural difference among all parts of glass is reduced; the residual stress inside the lens is released, so that an aspheric outline of a molding body is fixed on the status quo of the completed die-pressing stage; the residual stress inside the lens is reduced to a reasonable range so as to prevent the molded lens from cracking due to non-uniform temperature distribution in the subsequent quenching procedure.

The invention provides a composite phase-change material bag and a preparation method thereof and relates to the field of phase-change materials. The composite phase-change material bag is obtained byvacuum seal of an aluminum-plastic film and comprises a foam metal layer and a graphene layer which are alternately arranged in a laminated structure form; the foam metal layer contains a phase-change material. By using the composite phase-change material bag, the technical problems of low heat conduction efficiency and easiness in liquid leakage after foam metal and the phase-change material arecompounded in the prior art can be alleviated, and the aims of improving the heat conduction efficiency and reducing liquid leakage are achieved.

The invention provides a closed circulating evaporation and condensation system for treating high-salt and high-COD wastewater. The closed circulating evaporation and condensation system comprises: awastewater tank; a wastewater pump, one end of which is connected with the wastewater tank; an evaporation tower, which is arranged on one side of the wastewater tank; a condenser, which is arranged in the evaporation tower; a spraying pipe, which is installed in the evaporation tower, connected with the wastewater pump, and located above the condenser; and a primary heat recoverer, which is connected with the evaporation tower. The closed circulating evaporation and condensation system for treating the high-salt and high-COD wastewater has the advantages of low cost and capability of achieving normal-pressure evaporation, medium-low-temperature evaporation, efficient evaporation, energy-saving evaporation and stable evaporation.

The invention relates to an LED lamp module capable of directly packaging an LED chip on a radiating supporting carrier circuit. The LED lamp module comprises a solid radiating supporting lamp carrier circuit and the LED chip, wherein the solid radiating supporting lamp carrier circuit comprises a solid radiating supporting lamp carrier and a circuit which is integrated with the solid radiating supporting lamp carrier, and the LED chip is directly packaged on the solid radiating supporting lamp carrier circuit. The invention also relates to a method for manufacturing the LED lamp module. Compared with traditional LED modules, the LED lamp module capable of directly packaging the LED chip on the solid radiating supporting lamp carrier circuit shortens the heat transfer distance greatly, the heat transfer effect is good, surface mounting technology (SMT) welding is not required to be performed on LEDs and components, the whole manufacturing process is shortened, simultaneously, materials are saved, the manufacturing time is shortened, the production efficiency is greatly improved, and the production cost is reduced.

The invention discloses a semi-coke waste heat recovery system and belongs to the field of semi-coke processing equipment. The semi-coke waste heat recovery system comprises heat exchangers and water-cooled screw conveyers (5); two heat exchangers are fixed below one coke discharging port of a carbide furnace in parallel; one water-cooled screw conveyer (5) is fixed below the two heat exchangers; the upper side of each water-cooled screw conveyer (5) is provided with two feeding holes (50103) which are respectively communicated with discharge holes of the heat exchangers; the lower side of each water-cooled screw conveyer (5) is provided with a first discharge hole (50104); the heat exchangers comprise an outer heat exchanger (2) used for defining a material channel. The heat exchangers and the water-cooled screw conveyers are adopted to sequentially cool and exchange heat of semi-coke; meanwhile, the semi-coke can rotate and blend under the rotary push of water-cooled screw bodies in the water-cooled screw conveyers, the heat exchange effect is obviously enhanced, and the problem that the semi-coke is cooled and exchanges heat difficultly can be effectively solved, so that the semi-coke is subjected to dry quenching, energy and water resource are saved, and the pollution is small.

The invention relates to a polymer film joint method and a device and a polymer film stretching method. An off-line stretching device includes a film supply chamber, a tenter section, a relaxation chamber, a cooling chamber, and a winding chamber. The film supply chamber includes a splicing section, where a rear end of a preceding film and a front end of a trailing film are overlapped to be spliced to each other by thermal welding. The thermal welding is performed from above and below the film while a temperature of welding heads of a heat sealer, contacting with the film, is kept at a level equal to or less than a decomposition temperature of the preceding and trailing films. The spliced film is stretched in the tenter section and subjected to heat treatment for stress relaxation in the relaxation chamber, to shrink in a film width direction. Since the shrinkage amount of a spliced area and that of a peripheral area become equal to each other, the occurrence of wrinkles in the spliced area and tears of the film in the peripheral area can be prevented. Additionally, since a heat transfer distance between a film surface and a film splicing surface can be shortened, the heating from above and below the film enables high-speed welding.

The invention relates to the technical field of vacuum metallurgical equipment, in particular to an electro-magnetic induction internal thermal type metallic magnesium vacuum reduction furnace which comprises a furnace body. A material basket (8) is arranged in the furnace body, and a central channel penetrating through the bottom face of the material basket (8) is formed in the center of the material basket (8). One or more heating cylinders (7) are concentrically arranged in the material basket (8). The material basket (8) and the heating cylinders (7) are filled with furnace burdens (9). A rectangular iron core is arranged in the furnace body. One long edge of the rectangular iron core penetrates through the central channel of the material basket (8), and a primary side coil (12) is wound around the other long edge of the rectangular iron core. The leading-out end of a copper winding of the primary side coil (12) is led out of the furnace through an insulated sealing device on the furnace body and is connected with a power source device. The electro-magnetic induction internal thermal type metallic magnesium vacuum reduction furnace is reasonable in design, distribution of a temperature field of the reduction furnace can be regulated, and heat transfer efficiency is high; the vacuum reduction furnace is used for high-vapor-pressure metallothermics production of magnesium, lithium, strontium, calcium and the like.

The invention discloses a day lily infrared heat pump combined drying technology. The technology includes the following steps of S1, picking, cleaning and airing fresh day lily; S2, filling a processing bag with the day lily; S3, executing fixation action on the day lily in the processing bag; S5, stopping the fixation treatment, and filling a material plate with the day lily; S6, drying the day lily in the material plate through a heat pump; S6, conducting far infrared fixation treatment on the day lily in the drying treatment process of the heat pump; S7, stopping the radiation treatment ofa far infrared heat source and the drying treatment of the heat pump; S8, taking out the day lily, evenly spreading and airing the day lily, and conducting cooling until the room temperature is reached; S9, conducting vacuum bagging and storing on the aired day lily. The day lily drying efficiency is improved, the efficient low-consumption drying of the day lily is truly realized, coking and colorchanging caused by high-temperature drying of part of flower bodies are avoided, the loss of vitamins and other nutrients in flower buds is avoided, and the non-enzymatic browning of the day lily isreduced. The day lily processing effect is good, and the nutritional value is high.

The invention discloses a linking method for dual horizontal wells and relates to the field of oil and gas exploitation. The linking method comprises steps of testing a steam injection horizontal well and a producing horizontal well, injecting a solvent to the steam injection horizontal well and the producing horizontal well, injecting water to the steam injection horizontal well via a shaft of the steam injection horizontal well, injecting water to the producing horizontal well via a shaft of the producing horizontal well, continuously injecting water to the steam injection horizontal well and the producing horizontal well respectively, improving water injection pressure of the steam injection horizontal well and the producing horizontal well, closing the steam injection horizontal well and the producing horizontal well and injecting gas to the steam injection horizontal well and the producing horizontal well respectively when a first preset condition is met to enable underwell water to flow back to the ground, and injecting equal-pressure steam to the steam injection horizontal well and the producing horizontal well to meet a second preset condition when the underwell water flows back to the ground. Link evenness of the dual horizontal wells can be effectively enhanced, linking time of the dual horizontal wells can be shortened and solvent consumption amount can be greatly reduced.

The invention discloses a box type evaporator for waste heat utilization of high-temperature solid materials and belongs to the field of cooling equipment for the high-temperature solid materials. The box type evaporator is characterized in that an outer cylinderl (2) and an inner cylinder (1) are combined to form a sleeve type header; the lower end of a heat exchange box (7) is open; the sleeve type header seals the upper end of the heat exchange box (7); a feeding port (4) communicated with the inner cylinder (1) is arranged at the upper part of the sleeve type header; a water-cooled spiral distributor for conveying and cooling the materials is arranged inside the inner cylinder (1); a heat exchange cavity is arranged on the side wall of the heat exchange box (7) ad is communicated with an inner cavity of the outer cylinder (2); multiple isolating mechanisms are arranged inside the heat exchange box (7) in parallel and divide the heat exchange box (7) into multiple material channels; and the materials in the inner cylinder (1) fall into the material channels via discharge ports (6). Both the sleeve type header and the heat exchange box of the box type evaporator for waste heat utilization of the high-temperature solid materials can bear pressure, so that the evaporator can be directly applied to production of steam, and waste heat of the high-temperature materials is efficiently utilized.

The invention relates to an LED (Light Emitting Diode) lamp module and a manufacturing method thereof. Specifically, the LED lamp module provided by the invention comprises a stereoscopic radiating support lamp carrier, a sticky conductive medium and an LED, wherein the sticky conductive medium is distributed on the stereoscopic radiating support lamp carrier to form a circuit of the LED lamp module; and the LED is fixedly stuck to the circuit formed by the sticky conductive medium, and conducts with the circuit. The sticky conductive medium plays a role of a conductive circuit, as well as roles in sticking the LED and other electronic devices. The invention further provides an LED lamp module manufacturing method. According to the LED lamp module, etching is not needed to manufacture the circuit board, the whole manufacturing process flow is shortened as the LED and other devices are also not welded by SMT (Surface Mounting Technology), the materials are saved, the manufacturing time is shortened and the production efficiency is greatly improved, the environment pollution caused by etching in traditional circuit board manufacturing process is reduced, the production cost is greatly reduced, and the environment is protected.

The invention relates to an internal combustion engine exhaust gas recirculation cooler. The internal combustion engine exhaust gas recirculation cooler comprises a housing, heat exchange pipes, pipe plates and a fluid inlet-outlet and is characterized in that threads are processed outside the heat exchange pipes. The threads are processed outside the heat exchange pipes, so that turbulent flows formed by a cooling medium outside the pipes are intensified, a heat transfer distance between exhaust gas and the cooling medium at the thread bottom is shortened, the heat exchange efficiency is improved, and the internal combustion engine exhaust gas recirculation cooler is simple, convenient, easy to operate and obvious in effect.

The invention is a type of refrigerating absorber and its manufacturing method. It comprises inner and outer two round tubes suiting with each other. There is fixed with up and down cover boards, entrance and exit of carrier at each end of the outer round tube while passage of the carrier and passage of cryogen in the inner round tube. There is fixed pipe for cryogen in or out on the up cover board and up end cap while mouth for absorbent to be loaded. The absorbent is filled between the passage of cryogen and the passage of carrier. The manufacturing process is welding elements adopting the method of argon-arc welding with stainless steel. The invention makes advantages of jacket-style heat exchanger and heat exchanger with arranging pipes so it not only has high efficiency of diathermancy and mass transfer, fine pressure endure, but also has compact structure because of which it can reduce volume of the absorber to a large degree and increase charge of the absorbent.

The invention discloses a liquid methanol heating furnace which is a device integrating liquid methanol low-temperature start, methanol vaporization, methanol catalytic combustion and water preheating. The device is composed of a liquid methanol start cavity, a methanol and water preheating cavity, a methanol vaporization cavity, a methanol catalytic combustion cavity and a methanol exhaust gas secondary combustion cavity. In normal operation, liquid methanol is completely converted into carbon dioxide and water after being subjected to preheating, vaporization, catalytic combustion and secondary catalytic combustion; released heat is used for heating water, and hot water is used for civil heating or sanitary purposes. The device is compact in structure, sufficient in methanol combustion and high in thermal efficiency; no by-products such as CO are generated, hot and cold fluids are alternately distributed, local hot spots in a system can be effectively avoided, system operation is safe, the device can be widely applied to civil heating or sanitary facilities with methanol or other liquid fuel as fuel, and the device has the advantages of being clean, safe, hygienic, reliable and the like.