717results about How to "Avoid local overheating" patented technology

The invention relates to a preparation method and an application of multistage-spreading heat-dissipation fire-proof heat-insulation composite fabric. The multistage-spreading heat-dissipation fire-proof heat-insulation composite fabric is formed by successively arranging and laminating a metal foil reflection layer, a phase change temperature limitation layer, an interval composite membrane heat-insulation layer and a flame-retardant comfortable layer, wherein the metal foil reflection layer has high reflectivity and an enhanced heat-dissipation function; the phase change temperature limitation layer has functions of high energy consumption absorption and evenly-distributed heat conduction; the interval composite membrane heat-insulation layer has the functions of reflection insulation and even distribution of heat; and the flame-retardant comfortable layer has the functions of low-contact heat conduction, heat insulation and comfort. When the front side of the multistage-spreading heat-dissipation fire-proof heat-insulation composite fabric is under the action of open fire and strong heat flow environment, the back side of the multistage-spreading heat-dissipation fire-proof heat-insulation composite fabric can be kept below 50DEG C which is near the safe temperature state of the human skin, and the integral structural form and the mechanical property are stable. The natural thickness of the composite fabric is 5-15mm, the compression thickness of the composite fabric is 3-8mm, and the square meter quality of the composite fabric is 400-1500g/m<2>. The composite fabric is fire-proof heat-insulation material which is totally sealed, stuck and sewn and can be used for individual protection and environment heat insulation in special high-temperature occasions, such as fire control, military, exploration, safe escape and industry and the like.

The invention discloses a heat-dissipating double-sided adhesive tape with an ultrahigh heat conductivity coefficient. Ethylene glycol or triethylamine is added into a polyamic acid solution, the resulting mixture is put in an oven in a vacuum environment and maintained at 100 DEG C for 0.9-1.1 hours, the temperature is raised to 300 DEG C and maintained for 0.9-1.1 hours, followed by natural cooling, to produce a polyimide film; the polyimide film is heated up to 250 DEG C from room temperature and then heated up to 500 DEG C, and further heated up to 1200 DEG C at a rate of 9-11 DEG C/min, to produce a prefired carbonized film; the prefired carbonized film obtained in the step 4 is rolled by a calendar; the rolled product is heated up to 2400 DEG C at a rate of 19-21 DEG C/min and maintained for 0.9-1.1 hours and then heated up to 2900 DEG C at a rate of 19-21 DEG C/min and maintained for 1.8-2.2 hours, followed by cooling, to produce a fired graphite film; and subsequently the graphite film is rolled to obtain a graphite coating. The heat transfer performance of the double-sided adhesive tape in both the vertical and the horizontal directions are improved, so as to prevent local overheat of the adhesive tape and ensure uniformity of heat transfer performance of the adhesive tape.

The invention discloses a preparation method of polyacrylonitrile/graphene composite-based carbon fiber, which comprises the following steps: firstly preparing a polyacrylonitrile mixed solution uniformly dispersed with graphene through an in-situ polymerization method, and then employing the mixed solution as a spinning solution and obtaining a polyacrylonitrile/graphene composite protofilament by a wet spinning or dry-jet wet spinning process, and finally making the protofilament subject to a pre-oxidation treatment and a carbonization treatment to obtain the polyacrylonitrile/graphene composite-based carbon fiber. Compared with the existing polyacrylonitrile-based carbon fiber, the carbon fiber prepared by the method of the invention has a significantly increased mechanical property, and the carbonation yield in the preparation process is improved, therefore, the preparation method is an efficient and reliable preparation method with good application prospects.

The invention provides a method for preparing artificial rutile. The method comprises the following steps: titanium concentrate is subjected to oxidizing roasting and reducing roasting for removing impurities in oxidizing roasting products; and the products of which the impurities are removed are calcined, wherein the oxidizing roasting is performed in the presence of oxidizing gas, the reducing roasting is performed in the presence of reducing gas, and the oxidizing roasting and the reducing roasting are performed in a fluidized bed reactor. By adoption of the method, the high-grade artificial rutile can be prepared by adopting coarse fraction titanium concentrate as a raw material and can also be prepared by adopting micron-sized fraction titanium concentrate as the raw material.

The invention discloses a multi-stage boiling bed hydrogenation process. The method comprises the following steps of: mixing a hydrocarbon raw material and hydrogen, making the mixture enter a boiling bed reactor through the bottom of the boiling bed reactor; and reacting under the hydrotreatment conditions, wherein the boiling bed reactor comprises two or more than two internal circulation areas, and the internal circulation areas are provided with different operating sections. A plurality of internal circulation areas are formed in the boiling bed reactor, and different operating sections are formed, so that the whole boiling bed reactor is more flexible in operation, the properties of a reaction material flow can be reasonably matched with the performance of a catalyst, the activity of the catalyst is fully exerted, and the light oil yield and product quality are improved.

The industrial preparation method of high-purity beta-ionone is characterized by that 1. regulating dose of acetone, water and alkali to make the condensation reaction of citral and acetone be implemented under the condition of approaching to homogeneous phase, its reaction condition is moderate, reaction time is short and yield is high; 2. when the pseudo ionone is undergone the process of cyclization, at the same time the carbon dioxide ice is added so as to effectively prevent reaction system from local overheating and make the selectivity for forming beta-ionone be greater than 99%. Said invention can obviously raise product quality and yield, in the product the beta-ionone content is greater than or equal to 96.0%, alpha-ionone content is less than or equal to 1.0% and the yield is up to 72.0-85.0%.

A process for preparing the alpha-olefine as the drag reduce used for delivering oil in pipeline includes such steps as loading monomers into reactor, adding catalyst while stirring in the condition of isolating air, adding the oil-soluble polyester, polyether or ester-ether copolymer solution to which the alpha-olefine polymer is not dissolved, and reacting at -50-20 deg.C for 3-10 days. Its advantages are simple process, and high molecular weight, high effect, high stability and low viscosity of product.

The invention discloses a cross flow type two-stage moving bed active coke waste gas integrated purification tower which comprises a purification tower main body, wherein the purification tower main body is provided with an active coke feeding region, a denitration region, a transitional layer, a desulfuration region and a discharging layer sequentially from top to bottom; the denitration region comprises a denitration region active coke bed layer, a denitration region inlet chamber and a denitration region outlet chamber; the desulfuration region comprises a desulfuration region active coke bed layer, a desulfuration region outlet chamber and a desulfuration region inlet chamber; the transitional layer comprises an inlet chimney flue with a waste gas inlet, and a discharge hopper, the inlet chimney flue is arranged above the desulfuration region inlet chamber in a conducting manner, the denitration region active coke bed layer is connected with the desulfuration region active coke bed layer through the discharge hopper, and the desulfuration region outlet chamber is connected with the denitration region inlet chamber in a conducting manner. According to the invention, the pollution purification efficiency is high, the active coke utilization ratio is high, and the circulation volume is small; airflow distribution is uniform and the resistance is small; the flowing of the active coke is unobstructed and uniform, the denitration efficiency is high, and the operation is stable.

The invention relates to an aeroengine case seam allowance size repairing method. The porosity and hardness of a coating and the content of oxides in the coating can be effectively adjusted by controlling the plasma spraying power and the heating process of spraying powder during flying, and heat stress of the coating is reduced. The hardness and thermal expansion coefficient of the prepared nickel-aluminum coating are equivalent with those of a case, the bonding strength of the coating is far higher than the stress strength of a case seam allowance under the given working condition, and the use working condition of the aeroengine case can be met.

The invention relates to a reactive power compensation method and a reactive power compensation system for a micro power grid. The system comprises a distributed measuring unit, a reactive power compensation control unit, a reactive power compensation unit and a communication unit. The micro power grid comprises a distributed power supply with reactive regulation output. For the micro power grid operated in an isolated network mode, the overall reactive power balance condition of the micro power grid is obtained by measuring the active and reactive power distribution conditions of each branchcircuit of the micro power grid, and a reactive power compensation device or the reactive power compensation device and the distributed power supply are subjected to reactive regulation in the micro power grid according to a specific isolated network reactive control strategy to realize the reactive power compensation of the micro power grid. The power factor of the micro power grid can be measured and corresponding reactive power compensation is performed according to the power factor when the micro power grid is operated in a grid-connected mode and in the isolated network mode.

The invention relates to a server cabinet with a liquid cooling system. The server cabinet comprises a cabinet body, a liquid cooling distribution unit and a heat pipe heat-conducting unit, wherein the liquid cooling distribution unit comprises a liquid inlet pipe, a liquid outlet pipe, a liquid supply pipe and a liquid return pipe; the heat pipe heat-conducting unit comprises a liquid cooling module, a heat pipe and a heat-absorbing module; one end of the liquid supply pipe is connected with the liquid inlet pipe; the other end of the liquid supply pipe is connected with a liquid inlet of the liquid cooling module; one end of the liquid return pipe is connected with the liquid outlet pipe; the other end of the liquid return pipe is connected with a liquid outlet of the liquid cooling module; one end of the liquid return pipe is connected with the liquid outlet pipe; the other end of the liquid return pipe is connected with the liquid outlet of the liquid cooling module; one end of the heat pipe is connected with the liquid cooling module; the other end of the heat pipe is connected with the heat absorbing module; and the heat absorbing module is in contact with a server heat source of the cabinet body. Due to application of the heat pipe, a cooling liquid is prevented from entering a server; the risk that the server is damaged due to leakage of the cooling liquid is reduced; the server cabinet is simple in layout, and convenient to maintain and install; and the server can be flexibly added and reduced.

The invention belongs to the field of lithium ion battery materials, and particularly discloses a porous silicon monoxide composite material. The composite material comprises an inner core, a middle layer compounded on the surface of the inner core and an outer layer compounded on the surface of the middle layer, wherein the inner core is silicon, the middle layer is silicon monoxide and silicateof metal M dispersed in the silicon monoxide, the outer layer is a carbon coating layer, and the metal M is a metal element capable of reducing silicon oxide. The invention also provides a preparationmethod of the composite material and an application of the composite material as a negative electrode active material of a lithium ion secondary battery. Research finds that the composite material has the characteristics of long cycle life, high initial efficiency and the like.

Cooling apparatus (1), in particular a chest freezer (2), having a cooling circuit (3), a compressor (4), at least one evaporator (5) and a condenser (44), and a closable cooling chamber (6) with a plurality of cooling chamber side walls (7), a cooling chamber floor (8), at least one cooling element (9) and an insulating container (10). In the cooling apparatus (1), the evaporator (5) and the cooling element (9) are arranged within the cooling chamber (6) in such a way that the rear side of the cooling element (11) bears at least partially against the evaporator (5), and the front side of the cooling element (12) faces the insulating container (10), and the insulating container (10) is closed at least towards the at least one cooling element (9) and forms a chilled goods chamber (13). That rear side of the cooling element (11) which bears against the evaporator (5) has at least one cut-out (14), into which at least one removable refrigeration accumulator (15) can be inserted. At least one heating element (17) and at least one accumulator element (18) are preferably arranged in the region of the downwardly pointing end (16) of the insulating container (10).

The invention discloses a regenerative device and method for desulfurized and denitrified active coke. The regenerative device comprises a regenerative reactor, wherein the regenerative reactor is composed by the connection of an inlet blocking valve, a feeding bin, a heating bin, a regenerative bin, a precooling bin, a cooling bin, a discharging bin, and an outlet blocking valve in sequence; a heating heat exchanger component is arranged in the heating bin; a precooling heat exchanger component is arranged in the precooling bin; a cooling heat exchanger component is arranged in the cooling bin; a nitrogen carrying bin for inletting ammonia nitrogen gas to improve the desulfurization and denitrification performances of regenerated active coke during regeneration process is arranged between the precooling bin and the cooling bin. The regenerative method adopts the regenerative device to conduct the regeneration of the active coke. According to the invention, more reasonable utilization of energy can be realized in the regeneration process to allow the desulfurization and denitrification performance of the regenerated active coke to obtain further improvement; on-line modification can be conducted on the active coke through the nitrogen carrying bin to keep high desulfurization and denitrification performance of the active coke.

To form high performance bonding connections suitable for producing micro-structured components made of a plurality of individual layers, bonding by the steps; providing at least two work pieces; forming a metal bonding layer on at least one side of at least one of said at least two work pieces by chemical or electrolytic metal plating method; the metal bonding layer being a nickel/phosphorous alloy having a prescribed phosphorous content and prescribed thickness; forming a bonding arrangement comprising said work pieces so that there is at least one metal bonding layer between said at least two respective work pieces; heating at a prescribed heating rate to a temperature above the melting temperature of the bonding layer; bonding the two work pieces by applying contact pressure within a prescribed range; and cooling at a prescribed rate.

The invention relates to a solar thermal power system. The system, which is integrated with particulate heat absorption, heat storage and direct contact heat exchange, comprises a particulate heat absorption unit, a particulate heat storage unit, a direct contact type superheated steam generation unit and a steam power unit. In the operation process of the system, heat storage particles first absorb solar radiation heat energy in the particulate heat absorption unit to become high-temperature heat storage particles, the high-temperature heat storage particles are stored in the particulate heat absorption unit under atmospheric pressure, the high-temperature heat storage particles drop under gravity into the high-pressure direct contact type superheated steam generation unit to generate high-pressure superheated steam, and the superheated steam is inputted into the steam power unit after passing through a buffer tank and a pressure regulation valve. The solar thermal power system can store heat energy in a large capacity under atmospheric pressure and directly generate high-pressure superheated steam for outputting power to the outside, has the characteristics of simple structure, high stored heat temperature, low cost and the like, and is particularly suitable for the development of high-power, high-efficiency, high-temperature and low-cost new-generation solar thermal power generation systems.

The present invention relates to a distillation method of oxime. Tower bottom materials are usually heated by still distillation, a U-shaped outer tube or a rotary film evaporator, long-term operation of the tower bottom is easy to coking, and the distillation efficiency is low. The invention is characterized in that: in the distillation and separation section of oxime, at least one high boiling point solvent is added in the distillation process, the content of the high boiling point solvent in the tower bottom is maintained in proportional to that of oxime, and finally oxime is effectively separated by distillation. Oxime is fed into a rectifying tower, and is distilled at an absolute pressure of 0-0.4 MPa and at 20-300 DEG C to collect fractions. The unevaporated liquid left in the tower bottom is subjected to the processes of removing water and impurities, and is recycled to the rectifying tower as a high boiling point solvent. The present invention can reduce total production costs, simplify operation processes, prevent the product from coking in the tower bottom or decomposing due to overheating, ensure product distillation to be efficient, continuous, safe and stable, and improve product quality.

The present invention provides a process for the production of cresol. The raw materials comprising ethers, phenols and carbinol are preheated, and then continue through the multi-stage solid catalyst bed mixed with steam, carrying out a gas-phase reaction to product cresol at 250-450℃ reaction temperature, with 0.3-5h-1 feed weight airspeed, and under ordinary pressure. The solid catalyst is selected one or more from alumina, kaolin and molecular sieve catalyst. The phenols are selected from phenol, xylenol and mixture thereof. The ethers are selected from anisole, dimethyl ether, methylanisole, and their mixture of any two or more. When the once-through yield of cresol is 0.2g cresol/g catalyst, the para-selective of p-cresol could reach 45%. The catalyst has been characterized by excellent stability, and non-corrosiveness for equipment in productive process, which is a kind of environment-friendly catalyst with predictable industrial application prospect.

The invention discloses a multi-section boiling bed residual oil hydrogenation process method, which comprises the following steps of: mixing a hydrocarbon raw material with hydrogen, and feeding a mixture into a reactor from the bottom of a boiling bed reactor; and reacting under a hydrogenation treatment condition, wherein the boiling bed reactor comprises two or more internal circulation regions; and each internal circulation region is provided with different operation sections respectively. In the invention, a plurality of internal circulation regions are formed in the boiling bed reactor, and a plurality of different operation sections are formed, so that the entire boiling bed reactor is more flexible to operate, reasonable matching of the property of a reaction physical flow, operating conditions and catalyst performance can be realized, the activity of a catalyst is brought into full play, the yield of light oil is increased, the product quality is enhanced.

The invention discloses a method and a device for hot assembling a large-diameter bearing. The method comprises the following steps of: cleaning the interior and exterior of a bearing to be heated, and manufacturing a heating device; determining the dimension of a bottom plate, arranging a heating coil under the bottom plate, arranging a plurality of gas nozzles on the heating coil, connecting the heating coil with a gas bottle, and making the preparation work before heating ready; determining the heating temperature of the bearing; hanging the bearing in a sealed cavity of the heating device; igniting the gas nozzles of the heating device, and heating the bearing to the heating temperature required by the process; and hanging the bearing to a mounting position and assembling according to the requirement. In the method for hot assembling the large-diameter bearing, air in the sealed space is heated by coal gas and then directly heats the bearing, the energy consumption is low, the preparation time required is short, and the construction period can be shortened; and the oil heating is not adopted, the treatment for the waste oil is avoided, and the problem of environmental pollution caused by oil splashing and oil emission is avoided.

A motor used in evaporative cooling undersea device features that whole stator is located in enclosed stator cavity composed stator housing, end cover and inner sleeve, stator cavity is implanted with evaporative cooling media, wherein said stator core Stator core located between stator housing and inner sleeve, inner circle of stator housing and stator core excircle interference fit, inner sleeve excircle close fitting stator core inner circle, evaporative cooling media free-flowing in stator cavity and got down to stator core interior. Stator winding and stator core etc heating part generated heat quantity is conducted evaporative cooling media, when evaporative cooling media main unit temperature rises to corresponding pressure saturation temperature, media bubble and generate phase transition heat sink. Vaporization process generated vapour exchanges heat with external water of stator housing, and condenses and liquefies then backing to stator cavity.

The invention discloses a flowing boiling micro-miniature heat exchanger, which comprises a heat exchanger casing, a heat exchange structure passage, an inlet passage and an outlet passage, wherein the heat exchange structure passage is arranged in the heat exchanger casing; and the inlet passage and the outlet passage are arranged at the two ends of the heat exchange structure passage. The flowing boiling micro-miniature heat exchanger is characterized in that the inlet passage consists of a condensing medium input opening, a flow storage pool and an inlet flow division passage; the flow storage pool is connected between the condensing medium input opening and the inlet flow division passage; the outlet passage consists of a condensing medium output opening and an outlet flow division passage; a micro rib column group and support columns are arranged in the heat exchange structure passage; the micro rib column group consists of micro rib columns; the cross section dimension of the micro rib columns conforms to the fractal Brownian motion features; the micro rib columns are in planar distribution; the height of the micro rib columns meets the normal distribution; and the support columns are distributed in the center of the micro rib column group in an array mode. The flowing boiling micro-miniature heat exchanger has the advantages that the heat transfer efficiency is high; the flowing resistance loss is small; the surface temperature of the heat exchanger is uniform; the work is stable; and the service life is long.