252results about How to "Good preheating effect" patented technology

The invention discloses a Ni based-flux-cored wire. The Ni based-flux-cored wire comprises a flux core and a welding scale, wherein the flux core is prepared from the following components in percentage by mass: 86%-90% of Ni powder, 3%-5% of Mn powder, 6%-7% of Si powder, the balance of Cu powder, and the sum of the mass percentage of the components is 100%. The Ni based-flux-cored wire is used asa transition layer to avoid welding defects caused by thermophysical parameter difference of two types of materials during direction connection of copper-steel. The invention further provides a method for preparing copper-steel base gradient composite based on the Ni based-flux-cored wire used as the transition layer. The problem of the welding defects caused by direct connection in existing copper/steel composite is solved, parts can be combined from the steel side to the copper side to reach a gradient mode, so that the combining capacity of a heterogeneous material interface is enhanced, and the mechanical properties of composite members are improved.

The invention relates to a ship fuel preheating system. The ship fuel preheating system is characterized in that a fuel preheating branch pipeline and a fuel conveying branch pipeline are arranged between a storage bin and a sedimentation cabinet. A main pipeline is shared and is divided into two branches near the sedimentation cabinet, a preheating pump is arranged on one branch and provides high temperature fuel for the storage bin, a transfer pump is arranged on the other branch and conveys heated heavy oil to the sedimentation cabinet, and the two branches are provided with stop check valves in the corresponding directions so as to avoid pipeline direction malposition. A small compartment is arranged at one corner of the storage bin, and a first partition plate is arranged in the middle of the small compartment and divides the compartment into two parts in the X direction. A pipe A and a pipe B are arranged in a first sub-compartment, the upper right corner of the first partition plate is provided with a hole, the lower left corner of a second partition plate is provided with a hole, and the two holes are in opposite angle arrangement. Small holes are formed at the bottoms of partition plates to be used for sweeping. An upper plate of the compartment is provided with a plurality of air holes, so as to guarantee timely overflow of generated steam. The pipe A and the pipe B are communicated with the main pipeline and provided with regulating valves respectively.

The invention brings forward a carbon/carbon composite component chemical vapor infiltration device and aims to provide a device for solving problems of low reactant gas utilization rate and low infiltration efficiency existing by chemical vapor infiltration in the prior art. The invention is realized by the following technical scheme: a gas mixing and preheating device for primary control of reactant gas diversion direction and a temperature sensor for monitoring preheating temperature of reactant gas are arranged below a deep gas-mixing and outgassing device connected with a sealed infiltration chamber; the regulated and controlled reactant gas enters a gas mixing and preheating device from the bottom of a chemical vapor deposition furnace body through a gas supply device, and a controller automatically regulates electric power on a heater to obtain required preheating temperature; and the preheated reactant gas enters the sealed infiltration chamber and passes through a porous graphite liner plate to infiltrate through a composite preform placed inside the sealed infiltration chamber, and chemical vapor infiltration is performed under constant values by pressure control of a furnace pressure controller and temperature control of a temperature control sensor.

The invention discloses a method used for heating a cooling fluid so as to realize start-up preheating. The method comprises the following steps: a step 1, providing the cooling fluid, wherein the cooling fluid is filled in a circulating pipe; a step 2, providing fuel oil and igniting the fuel oil so as to heat the cooling fluid in the circulating pipe; a step 3, connecting the circulating pipe to an engine, enabling the cooling fluid to circularly flow in the circulating pip, and continuing to heat the engine; a step 4, collecting the waste gas generated by fuel oil combustion, and introducing the waste gas to the bottom of the engine so as to heat the engine; and a step 5, judging the temperature of the engine, and when the temperature of the engine achieves a threshold, stopping burning the fuel oil. The method provided by the invention has the advantages of low-temperature startup and high-temperature stop functions and high security.

The invention discloses an engine cold-start preheating device. A heat storing heat exchanger (3) is in a parallel connection with an exhaust pipe (2) of an engine (1), the heat storing heat exchanger (3) is used for storing exhaust air waste heat of the engine (1), the heat storing heat exchanger (3) is in a columnar structure, a plurality of heat storing units are distributed in the heat storing heat exchanger (3), each heat storing unit is a concentric casing pipe (7) which comprises an inner pipe and an outer pipe, a phase change thermal storage material (8) is encapsulated in annular space between the inner pipe and the outer pipe, two ends of the inner pipe are welded on two flow guide plates (9) respectively, a hollow cavity for enabling cooling water of the engine (1) to flow through is formed by the two flow guide plates (9) and inner walls of the heat storing heat exchanger (3), and the inner walls of the heat storing heat exchanger (3) are located between the two flow guide plates (9). The engine cold-start preheating device has the advantages of being low in costs, small in size, efficient, energy-saving and convenient to popularize and use in a wide range.

The invention discloses a scrap preheater of an electric-arc furnace step disturbance culvert. The scrap preheater comprises a heat-exchanging culvert, the low side of the heat-exchanging culvert is connected with a furnace, the high side of the heat-exchanging culvert is respectively connected with a smoke-collecting and dust-removing pipe and a feed sealing device, the heat-exchanging culvert comprises a material- conveying groove and a smoke guide cover, the material-conveying groove is used for conveying steel scrap materials to the electric-arc furnace, the smoke guide cover is covered on the material- conveying groove and is used for guiding smoke, the heat-exchanging culvert is provided with at least one cross-section abrupt change structure in the height-extending direction, and the cross-section abrupt change structure is used for disturbing the steel scrap material flow state and the smoke flow state. The invention further discloses a preheating method of the electric-arc furnace step disturbance culvert, and the steel scrap materials can be added to the material-conveying groove by the feed sealing device; the steel scrap material flow state is disturbed under the combined action of the cross-section abrupt change structure on the heat-exchanging culvert and horizontal vibration, so that the steel scrap materials have air permeability in a certain area; and the smoke flow state can be disturbed in the smoke guide cover, so that the smoke and the steel scrap materials can be subjected to heat exchanging fully.

The invention provides a steel-making device and a steel-making method. The steel-making device comprises a pre-heating device, an electric-arc furnace, a refining device, a middle smelting device anda continuous casting machine, wherein the pre-heating device is provided with a feeding inlet and a discharging outlet; the electric-arc furnace comprises a furnace housing, the furnace housing is provided with a feed inlet and a steel outlet, the feed inlet is communicated with the discharging outlet, and the bottom of the furnace housing is provided with a first stirring device for stirring molten steel. The refining device is provided with a liquid inlet and a liquid outlet, and the liquid inlet is communicated with the steel outlet; the middle smelting device is provided with an inlet andan outlet, the inlet is communicated with the liquid outlet, and the middle smelting device is internally provided with a filter assembly; the continuous casting machine is provided with a feed inletand a steel outlet, and the feed inlet is communicated with the outlet. In the steel-making device, it is not required that steel ladles are transferred, in the steel-making process, dynamic continuous running can be achieved, the production period is shortened, and the yield is increased.

The invention discloses a method for preparing calcium carbide and a synthetic gas via a flameless oxidation heating method, and a calcium carbide reactor, and solves problems of influencing time and effect of calcium carbide reaction caused by uneven heat distribution of the calcium carbide and the synthetic gas prepared by a conventional method and non-uniform particle size of materials entering a reaction chamber. In the method, flameless combustion in the reaction chamber is realized by controlling oxygen content in a mixed gas passing into the reaction chamber; and problems of non-uniform particle size of materials in the reaction chamber is solved by designing feeding particle size at two feeding ports. The reactor enables heat distribution in the chamber to be more uniform through the improvement of oxygen burners of the reaction chamber and a vaporizing chamber. The method is simple in process, is safe and reliable, has more uniform heat distribution, high calcium carbide reaction efficiency and high calcium carbide purity, low loss to furnace walls, the content of the generated synthetic gas is over 7 times that a conventional electrothermal method, and at the same time, consumption rate of raw materials and fuels is low.

An efficient energy-saving pyrolysis tank device for soil restoration is disclosed. The device includes a superconducting magnetic annular water jacket, a soil pyrolysis restoration tank body, a preheating water jacket, a high-frequency coil, a ceramic inner cylinder and a spiral blade. The ceramic inner cylinder is mounted inside the soil pyrolysis restoration tank body. The inside of the ceramicinner cylinder is a pyrolysis restoration cavity. A rotating shaft is mounted in the middle of the pyrolysis restoration cavity. The rotating shaft in the pyrolysis restoration cavity is welded to the spiral blade. The surface of the spiral blade is provided with a plurality of liquid spraying holes. The liquid spraying holes are communicated with a flow guide passage in the rotating shaft. The external wall of the ceramic inner cylinder is wound with the high-frequency coil. The superconducting magnetic annular water jacket is disposed outside the high-frequency coil. The inside of the superconducting magnetic annular water jacket is a hot-water cavity. Energy-saving effects of the device are good. The soil restoration cost is reduced. Agent spraying uniformity and sufficiency during soil restoration are improved. Heating and restoration effects on soil in the pyrolysis restoration cavity are improved, and the heating efficiency is high. The superconducting magnetic annular water jacket completely shields electromagnetic drifts.

An exhaust gas purifying catalyst comprises a substrate having a through hole serving as a passage for exhaust gas; and a catalyst coating layer formed on an internal surface of the through hole. The catalyst coating layer contains: a component (i): a precious metal; and a component (ii): at least one of a Zr oxide, a Ce oxide and a ZrCe mixed oxide. On an upstream portion of the passage, an oxide equivalent weight of Zr is within a range of 51-100 wt % of an oxide equivalent weight of Zr and Ce contained in the component (ii). On a downstream portion of the passage, the component (ii) includes at least one of a Ce oxide and a ZrCe mixed oxide in which an oxide equivalent weight of Ce is within a range of 58-100 wt % of an oxide equivalent weight of Zr and Ce contained in the ZrCe mixed oxide.

The invention discloses a control method for lowering preheating noise of a compressor. When the compressor is preheated, a compressor winding U, a compressor winding V and a compressor winding W are electrified in a time sharing manner; two-phase windings are electrified at the same time within each electrification period, current during compressor preheating is reduced, accordingly, noise generated during compressor preheating is lowered, influences on normal life of users are avoided, user complaints due to the noise problem are avoided, and the using experience of the users is improved. Meanwhile, effective preheating of the compressor is guaranteed, and a good preheating effect is achieved. Meanwhile, in each electrification period, electrification current is fluctuated and is not constant, compressor damage due to continuous too high constant current is avoided, and the poor preheating effect caused by continuous too low constant current is avoided; and a good preheating effect is guaranteed, and compressor damage is avoided as well.

The invention provides a production technology of a corrugated board with two film-coated surfaces, and belongs to the technical field of cardboard processing. The technology comprises the following steps: (1) printing patterns on OPP films; (2) laminating the printed OPP films on the top surface and bottom surface of a corrugated board; (3) pre-heating the corrugated board with laminated OPP films, and finally moulding the corrugated board in a moulding machine to obtain the corrugated board with two film-coated surfaces. The invention further provides a corrugated board with two film-coated surfaces, which is produced by the provided production technology. The production technology has the advantages of high production efficiency, low production cost, and simple technology, and can achieve film-coating and printing on two surfaces of a corrugated board. The surface of the printed patterns cannot be easily scratch or damaged, and the pre-heating effect is good. The produced corrugated board with two film-coated surfaces has a good dampproof and wear-resistant performance, and can be applied to refrigeration of high-end seafood and dairy products. The corrugated board will not absorb water and become soft in the refrigeration house, so the corrugated board is suitable for being used in the cold-chain transportation or storage.

A temperature-controlled resistor housing of preheating welding wire belongs to welding field. The aim of the invention is to settle the problems of low efficiency when the resistor heating and high-frequency induction method is adopted for preheating the low-resistivity and non-magnetic material welding stick and complicated technique for directly preheating the welding wire with an auxiliary TIG electrical arc. The temperature-controlled resistor housing of preheating welding wire according to the invention comprises a cooling water jacket, a specular stone layer, an outer ceramic pipe, an electric heating wire, an inner ceramic pipe, a water inlet pipe and a water outlet pipe. The welding wire is positioned in the inner ceramic pipe. The electric heating wire is positioned between the inner ceramic pipe and the outer ceramic pipe. The electric heating wire is winded at the outer surface of inner ceramic pipe. The outer surface of outer ceramic pipe is installed with the specular stone layer. The outer surface of specular stone layer is installed with a cylindrical cooling water jacket. The outer wall of cooling water jacket is installed with a water inlet pipe and a water outlet pipe for circulating the cooling water. The temperature-controlled resistor housing of preheating welding wire according to the invention is used for preheating the welding wire.

The invention discloses a butt clamp heat exchanger for preheating air by using waste heat of flue gas, which comprises a heat exchange clamp jacket cavity formed by an inner cylinder and an outer cylinder, wherein openings at both ends of the inner cylinder are used for allowing the waste heat flue gas to flow through; both ends of the outer cylinder and the inner cylinder are sealed by an annular plate; a cold air inlet is connected to one edge of the lateral surface of the outer cylinder, and a hot air outlet is connected to the other edge of the lateral surface of the outer cylinder; and the cold air inlet and the hot air outlet are opposite mutually. The butt clamp heat exchanger has a simple structure, small airflow resistance and good heat exchange effect, and is convenient to manufacture.

The invention relates to the technical field of heating oven equipment, in particular to a drawer type preheating oven through which the continuous uniform heating can be conveniently realized, and of which the preheating effect is good. The drawer type preheating oven comprises an oven chamber, wherein a preheating compartment and a wind channel which communicate are formed in the oven chamber; a wind distributing plate is arranged at a connecting position of the wind channel and the preheating compartment; ventilation holes which are uniformly formed are formed in the wind distributing plate; an electric heating pipe is mounted in the wind channel; blowing blades connected with a motor are arranged on the outer side of the wind distributing plate; a material inlet and outlet is formed in the front side of the preheating compartment; an oven door is mounted on the material inlet and outlet; a guide rail is arranged in the oven compartment corresponding to the material inlet and outlet; and an assembly retainer is mounted on the guide rail through a guide wheel.

The invention relates to a scrap steel preheating system for an electric arc furnace, which realizes the preheating for steelmaking raw materials for the electric arc furnace by fully utilizing the physical and chemical waste heat of high-temperature flue gas of the electric arc furnace and enables a dust removal system to filter and cool the high-temperature flue gas to achieve the purposes of energy saving, reduction of consumption, emission reduction and environment protection as well as improve the steelmaking production ratio of the electric arc furnace and to realize the investment and alteration of preheating scrap steel by high-temperature flue gas in a current old factory workshop. The scrap steel preheating system for an electric arc furnace comprises scrap steel preheating basket mechanisms and a basket rotation swing mechanism; the basket rotation swing mechanism is respectively connected with the scrap steel preheating basket mechanisms positioned at a scrap steel receiving position and a scrap steel preheating position through swing supporting frames; and a high-temperature flue gag water-cooling flue and a scrap steel preheating cap are arranged between the basket rotation swing mechanism and the upper end of the scrap steel preheating basket mechanism at the scrap steel preheating position.

The invention relates to an anti-counterfeiting label outer surface laminating machine. The laminating machine comprises a base, wherein the left end of the base is provided with a power mechanism, the top surface of the base is provided with an upper pressing roller and a lower pressing roller through a driving shaft, a gap is left between the upper pressing roller and the lower pressing roller to ensure the passage of an anti-counterfeiting label and a membrane, the driving shaft is connected with the power mechanism by a coupling, a driven shaft is arranged above the base by a left side plate and a right side plate, the driven shaft is connected with the power mechanism, a membrane roll is arranged on the periphery of the driven shaft, and the top surface of the base is provided with apre-heating mechanism through two mounting mechanisms. According to the provided anti-counterfeiting label outer surface laminating machine, a gap is left between pre-heating rollers and the membraneroll, the membrane roll temperature is reduced, the inner structure of the membrane is protected, the service life of the membrane is prolonged, the membrane roll is uniformly pre-heated, the pre-heating effect is good, the laminating quality is improved, the membrane is prevented from falling off, the pre-heating hot air flow impact force is small, and the risk of breaking the membrane is reduced.