42results about How to "Change dwell time" patented technology

The invention discloses injectable hyaluronic acid / polyethylene glycol hydrogel as well as a preparation method and application thereof, and belongs to the fields of plastic and cosmetic biological materials. The method is characterized in that a cyclooctyne-modified hyaluronic acid (HA) solution is mixed with a nitrine-modified polyethylene glycol (PEG) solution, a hydrogel precursor solution with favorable flowability is formed, and the hydrogel precursor solution can be quickly cross-linked through a ring tension promoted click chemical reaction to form the hydrogel after being injected into a body, so as to play roles in water retention, plastic and the like. The preparation process of the material is simple; the additional addition of a cross-linking agent is not needed; the heating is not needed; the ultraviolet treatment or the radiation and the like are not needed; one-step cross-linking is adopted; the injectable hyaluronic acid / polyethylene glycol hydrogel is non-toxic and has no stimulation; therefore, the made hydrogel is good in biocompatibility, and is insignificant in inflammatory reaction. Meanwhile, the gel is slower in degradation speed, and is excellent in mechanical performance; therefore, the material is good in durability and molding performance, is quite applicably used as a face-lifting filling material in the fields of wrinkle resisting, breast enlargement, nose augmentation, filling-padding and the like.

The invention discloses a high-temperature slag economizer in the field of acid making equipment. The high-temperature slag economizer comprises a shell consisting of an upper shell, a lower shell and a heat exchange section cylinder body; the top part of the upper shell is provided with a slag inlet; the bottom of the lower shell is provided with a slag outlet; an upper tubeplate is arranged between the upper shell and the heat exchange section cylinder body; a lower tubeplate is arranged between the lower shell and the heat exchange section cylinder body; a plurality of heat exchange tubes are arranged between the upper tubeplate and the lower tubeplate; a water inlet and a water outlet are also arranged on the heat exchange section cylinder body; the centers of the upper tubeplate and the lower tubeplate are provided with central tubes; the upper end of the central tube is provided with a cylindrical central supporting seat; the side of the central supporting seat is provided with a pluralities of axial grooves; the upper end of the central supporting seat is horizontally provided with a disc-shaped feed divider; the periphery of the heat exchange tube is provided with a ring of bypassing tubes; the inside diameter of the heat exchange tube is less than that of the bypassing tube; the inside of the central tube is provided with a signal tube; and the lower part of the signal tube extends to the outside of the lower shell. The high-temperature slag economizer solves the problem that slag agglomerates and blocks the heat exchange tube, and permits the agglomerated slag to pass through the bypassing tube; and the device utilizes residual heat in the manufacturing industry of sulfuric acid to produce low-pressure steam and hot water, thereby saving fuel.

The invention relates to special equipment for two-medium quenching heat treatment and cooling and a technology of the equipment. The equipment comprises landing legs, a sliding plate, a separation plate, a box plate, a slotted-angle shelving, a roller seat, a pull rope, guide rails, a guide roller, a net basket, a rope reeling roll, a stepping motor and a control cabinet, wherein the box plate and the slotted-angle shelving are welded to form a quenching cooling tank; the quenching cooling tank is supported by the landing legs; the separation plate is welded in the quenching cooling tank, and divides the quenching cooling tank into a water tank and an oil tank with the lower parts communicated; the lower part the water tank is welded with the sliding plate; the sliding plate is placed obliquely; steel is heated and subjected to heat preservation to form austenite, then is put in the water tank, and enters the net basket via the sliding plate; and the net basket and the steel in the net basket move up into oil from water through a lifting mechanism under control of the control cabinet, so that the water quenching and oil cooling two-medium quenching technology is achieved. According to the equipment and the technology, quenching deformation and cracking of the steel can be avoided effectively; an automation degree is high; the labor intensity is low; brine and oil two-medium quenching and brine-oil-air three-medium quenching can be achieved; and the equipment and the technology have broad market prospects.

The invention relates to the technical field of energy, and discloses an oxygen-enriched burner and an air distribution method thereof. The burner comprises a combustion chamber, wherein a burnout air port, primary air ports and secondary air ports are formed in the wall of the chamber so as to form a line of air ports, the primary air ports and the secondary air ports are vertically formed below the burnout air port in the height direction of the combustion chamber at intervals, and the primary air ports are located between adjacent secondary air ports. The air distribution method of the oxygen-enriched burner comprises the steps of closing the burnout air port, and opening the primary air ports and the secondary air ports in the working condition of oxygen-enriched combustion; adjusting the volume of circulating smoke which enters a boiler and injected oxygen so as to adjust the oxygen partial pressure of the boiler; controlling a part of the injected oxygen to enter the primary air ports and the other part of the injected oxygen to enter the secondary air ports, and adjusting the oxygen partial pressure of primary air or secondary air; and controlling the momentum of the primary air to be the same as that of the primary air in the working condition of air combustion. According to the oxygen-enriched burner and the air distribution method, the high efficiency and stability of pulverized coal combustion are increased in the working condition from air combustion to oxygen-enriched combustion.

The invention relates to a compound spinning assembly with a replaceable sand cavity inner sleeve and application thereof. The assembly comprises a sand cavity body 1, a sand cavity internal distribution block 2, a metal sand filter 3, a metal filter screen 4, a metal sealing ring 5 and a movable sand cavity inner sleeve 6, wherein the sand cavity body 1 comprises a component A sand cavity and a component B sand cavity, and the movable sand cavity inner sleeve 6 is matched with the component A sand cavity or the component B sand cavity. The compound spinning assembly provided by the invention can reduce the volume of the sand cavity by times so as to reduce the retention time of the components with smaller pumping power in the sand cavity, thereby finally and obviously reducing the fusant degradation and realizing spinning in a steady state. The sand cavity inner sleeve is replaceable, can be set with different inner diameters and can be used or not used according to the technological requirements, thereby realizing the control on the retention time of the fusant without replacing the sand cavity.

The invention discloses a method for drying and desolventizing cottonseed meal and special drying and desolventizing equipment of the method. The cottonseed meal is dried and desolventized by virtue of a drying tower, wherein the drying tower comprises a tower body and a stirring mechanism; the interior of the tower body comprises at least 5 layers, namely a discharging layer (1), a cooling layer (2), a drying layer (3), a ventilating layer (5) and a pre-desolventizing layer (6) sequentially; a partition board below the cooling layer (2), the drying layer (3), the ventilating layer (5) and the pre-desolventizing layer (6) is a sandwich hollow sheet; steam is directly input from the ventilating layer (5) and cooling gas is directly input from the cooling layer (2); the drying layer (3) and the pre-desolventizing layer (6) are used for indirectly heating by virtue of steam; and various layers are formed with material level regulating holes and corresponding material level regulating mechanisms for regulating the height of a material layer. Compared with the prior art, the drying and desolventizing method and the drying and desolventizing equipment disclosed by the invention can be used for effectively solving problems of an existing cottonseed meal protein treatment process which is instable in product, poor in color, high in residual oil, high in solvent consumption and the like, and the stable quality of the cottonseed meal protein is guaranteed.

The invention discloses halogen-free high-activity low-splatter solder wire soldering flux and a preparing method thereof. The halogen-free high-activity low-splatter solder wire soldering flux comprises, by mass, 2-10 percent of alcohol or alcohol ether high-boiling-point solvent, 0.08-1.5 percent of high-activity iodate, 2-10 percent of compound binary organic acid, 0.5-5 percent of halogen-free activity enhancer, 2-15 percent of viscosity modifier, 0.04-0.2 percent of efficient surface active agent and the balance modified rosin and rosin derivatives. The preparing method includes the steps that the compound rosin and the viscosity modifier are added into a container to be heated and stirred until the compound rosin and the viscosity modifier are completely melted down, the organic acid, the novel high-activity iodate, the efficient surface active agent and the high-boiling-point solvent are added to be stirred continuously, and therefore the soldering flux is prepared. The prepared halogen-free soldering flux for solder wires is free of halogen compounds, tin is easy to apply in the soldering process, splatter is little, smells are light, soldering spots are bright and full, damage to the health and the environment is avoided, and the post-soldering reliability effect of an electronic product is ensured.

The invention relates to a mixing and extruding granulator set. The melt mixing degree adjusting device of the mixing granulator set is characterized in that a valve is provided with a material channel, and that the material channel is provided with a rotatable valve core or valve plate, the flow areas of which vary with the rotation angle. The invention has novel structure, small volume and the mixing degree can be adjusted through the valve, the material channel area of which can be adjusted. The valve has simple structure, and with the angle between the rotatable valve core or valve plate in the material channel and the horizontal plane of the material channel changes, the flow area of material changes correspondingly, thus adjusting the flow resistance of the material from the mixing transmission part in the channel, changing the resident time of material in the channel, achieving the goal of increasing the mixing effect of the material, adjusting the back pressure of the materialin the mixing transmission system and changing the actual power consumption of the main drive motor of the set.

The invention discloses a halogen-free low-splash solder wire and a preparation method of the halogen-free low-splash solder wire. The halogen-free low-splash solder wire comprises the following ingredients in percentage by mass: 97.4 percent to 98.2 percent of welding fluxes and 1.8 to 2.6 percent of soldering fluxes, wherein the welding fluxes are selected from one of materials including Sn-0.7Cu, Sn-3.0Ag-0.5Cu and Sn-0.3Ag-0.7Cu, and the soldering fluxes consist of the following ingredients in percentage by mass: 12 to 22 percent of rubber, 6.5 to 8.5 percent of organic acid, 2 percent of benzotriazole, 2 percent of imidazole substances, 3 percent of oxidation resistant oil, 3.5 to 4.5 percent of composite active agents and the balance of rosin. The preparation method is characterized in that firstly, the soldering fluxes are prepared according to the proportion, and then, the solder wire is obtained through work procedures of wire extrusion, wire pulling and wire winding. The characteristic indexes of the solder wire respectively meet the requirements of JIS-Z-3197 and IPC-TM-650 standards. After the welding, welding spots are bright and full, the odor is low, the splash is little, and green and environment-friendly effects are realized.

The invention relates to special equipment for two-medium quenching heat treatment and cooling and a technology of the equipment. The equipment comprises landing legs, a sliding plate, a separation plate, a box plate, a slotted-angle shelving, a roller seat, a pull rope, guide rails, a guide roller, a net basket, a rope reeling roll, a stepping motor and a control cabinet, wherein the box plate and the slotted-angle shelving are welded to form a quenching cooling tank; the quenching cooling tank is supported by the landing legs; the separation plate is welded in the quenching cooling tank, and divides the quenching cooling tank into a water tank and an oil tank with the lower parts communicated; the lower part the water tank is welded with the sliding plate; the sliding plate is placed obliquely; steel is heated and subjected to heat preservation to form austenite, then is put in the water tank, and enters the net basket via the sliding plate; and the net basket and the steel in the net basket move up into oil from water through a lifting mechanism under control of the control cabinet, so that the water quenching and oil cooling two-medium quenching technology is achieved. According to the equipment and the technology, quenching deformation and cracking of the steel can be avoided effectively; an automation degree is high; the labor intensity is low; brine and oil two-medium quenching and brine-oil-air three-medium quenching can be achieved; and the equipment and the technology have broad market prospects.

The invention relates to a method for realizing particle size regularization of titanium dioxide. The method comprises the following steps: analyzing the particle size of primary metatitanic acid aggregate particles in metatitanic acid slurry, and regulating and controlling the heating rate in the metatitanic acid calcining process according to the particle size of the primary metatitanic acid aggregate particles, thereby realizing particle size regularization of titanium dioxide. Compared with the prior art, the heating rates of titanium dioxide in different stages of calcination are regulated and controlled according to the size of the primary metatitanic acid aggregate so that the staying time of the particles in different temperature sections is changed, the purpose of adjusting the crystal transformation rate and the crystal growth rate of TiO2 is achieved, regularization of the particle size of titanium dioxide is achieved, and the method has guiding significance for actual industrial production.

The invention discloses a preparation method for a self-assembly nano oxynitride coating. A traditional PVD technology is adopted to prepare the self-assembly nano oxynitride coating; retention time, in different plasma regions, of a sample is changed by regulating autorotation and revolution speed of the sample according to a phenomenon that plasma energy and energy distribution within different distance ranges of a target is different, so that the self-assembly nano oxynitride coating is prepared. The coating comprises an oxygen-rich layer and a nitrogen-rich layer, wherein the oxygen-rich layer and the nitrogen-rich layer are alternatively deposited on a base body; and the coating comprises the following components: 20-35at.% of Al, 10-25at.% of Cr, 0-15at.% of Si, 5-50at.% of O and 10-50 at.% of N. The preparation method is simple in preparation process, is low in cost, is good in adaptation, integrates the advantages of a nitride coating and an oxide coating, and has great application and popularization potential.

The invention discloses injectable hyaluronic acid / polyethylene glycol hydrogel as well as a preparation method and application thereof, and belongs to the fields of plastic and cosmetic biological materials. The method is characterized in that a cyclooctyne-modified hyaluronic acid (HA) solution is mixed with a nitrine-modified polyethylene glycol (PEG) solution, a hydrogel precursor solution with favorable flowability is formed, and the hydrogel precursor solution can be quickly cross-linked through a ring tension promoted click chemical reaction to form the hydrogel after being injected into a body, so as to play roles in water retention, plastic and the like. The preparation process of the material is simple; the additional addition of a cross-linking agent is not needed; the heating is not needed; the ultraviolet treatment or the radiation and the like are not needed; one-step cross-linking is adopted; the injectable hyaluronic acid / polyethylene glycol hydrogel is non-toxic and has no stimulation; therefore, the made hydrogel is good in biocompatibility, and is insignificant in inflammatory reaction. Meanwhile, the gel is slower in degradation speed, and is excellent in mechanical performance; therefore, the material is good in durability and molding performance, is quite applicably used as a face-lifting filling material in the fields of wrinkle resisting, breast enlargement, nose augmentation, filling-padding and the like.

The invention provides an annular wall-heating type reverse injection pulverized coal burner, comprising: a pre-combustion structure, the pre-combustion structure has a preheating combustion chamber and a central ejection air pipe communicating with the preheating combustion chamber; a reverse injection The assembly includes a main pulverized coal pipe and a grooved retaining ring. The main pulverized coal pipe is sheathed on the outside of the pre-combustion structure and surrounds the main pulverized coal flow channel. The grooved retaining ring is connected to the The end of the main pulverized coal pipe is partly located at the outlet end of the pre-combustion structure, and the groove-shaped retaining ring and the end of the pre-combustion structure are surrounded by a reverse injection channel; and the secondary air assembly , including a secondary air pipe and a hollow opening blade, the secondary air pipe is sleeved on the outside of the main pulverized coal pipe, and is surrounded with the main pulverized coal pipe to form a secondary air channel, the hollow opening The rotary vane is arranged at the outlet end of the secondary air passage. There are no other pipelines and auxiliary structures inside the preheating combustion chamber, which makes the structure of the annular wall heat reverse injection pulverized coal burner simple and reliable in operation.