104results about How to "Prevent gasification" patented technology

The invention discloses a welding process method of brass H62, which uses a welding wire Scu6810A and a soldering flux CJ301, and uses a manual argon tungsten-arc welding method. The welding process method of the brass H62 comprises the following steps of: firstly, machining a groove of a welding piece, wherein a groove angle is 32.5-37.5 degrees; controlling a truncated edge within a range of 0-1.5 mm; cleaning the welding surface of a welding piece and a welding wire; coating soldering flux paste of the soldering flux CJ301 on the groove of the clean welding piece and an area within a 30-mm range near the groove, as well as the surface of the welding wire; assembling the welding piece with an assembly clearance of 1.5-3.0 mm; pre-heating the welding piece to 200-300 DEG C before welding; welding a welding bead at a bottom layer by using a high-frequency arc striking technology; cleaning the surface of the welding bead at the bottom layer after the welding bead at the bottom layer is welded; coating the CJ301 soldering flux paste on the surface of the welding bead at the bottom layer; welding a filling layer, cleaning the surface of the filling layer after the filling layer is welded, and coating the CJ301 soldering flux paste after cleaning the surface of the filling layer; welding a cover surface layer; welding a weld joint and then pickling, and washing the weld joint with water; and drying with hot air.

The invention discloses a plasma gasification and melting system for solid waste centralized processing, and relates to the technical field of solid waste thermochemical treatment. The system comprises a plasma gasification and melting furnace, a synthesis gas outlet of the plasma gasification and melting furnace is connected with a secondary combustion chamber, a high-temperature smoke outlet ofthe secondary combustion chamber is sequentially connected with a waste heat recycling system and a smoke purifying system, and the synthesis gas outlet of the plasma gasification and melting furnaceis further connected with a reforming chamber, a high-temperature synthesis gas outlet of the reforming chamber is sequentially connected with a heat exchange system and a synthesis gas purifying system. The controlled oxygen combustion technology is adopted in the plasma gasification and melting furnace, the excessive air coefficient of primary air is about 0.3 to 0.5, the dust amount in rough synthesis gas can be effectively reduced, re-generation of toxic and harmful substances of dioxin and furan can be restrained, and the production of flying ash amount can be reduced.

The invention discloses a catalytic cracking method for hydrocarbon oil. The method is characterized by comprising the following steps of: (1) undergoing a first contact reaction on a hydrocarbon oil raw material and a first cracking catalyst in a first reactor, and performing first oil-agent separation on a mixture of oil gas and the catalyst after the first contact reaction; (2) undergoing a second contact reaction on oil gas obtained after first oil-agent separation and a second newly-added cracking catalyst in a second reactor, and performing second oil-agent separation; and (3) feeding a part of or all of a spent catalyst obtained in the step (2) into the first reactor. The invention further provides catalytic cracking equipment for hydrocarbon oil. Due to the adoption of the method and the equipment, the problem of poor activity in the second reactor caused by great reduction in the activity of the catalyst discharged from the first reactor is solved, and the yields of dry gas and coke can be lowered greatly.

The invention relates to a method for bonding an LED chip and heat sink by adopting laser to heat the back of the heat sink, in particular to a method for bonding an LED chip and heat sink; the method solves the problems that when the laser beams directly radiate on a brazing filler metal layer, the brazing filler metal is to undergo oxidization and even vaporization due to rapid temperature raising in a short time, and the reliable bonding of the LED chip and heat sink cannot be ensured. The specific steps of the method are as follows: first, the metal Au is plated on the back of the LED chip and the bonding pad of the heat sink; then, the brazing filler metal layer is plated or printed on the Au-plated bonding pad; the LED chip is attached on the brazing filler metal layer of the Au-plated bonding pad; laser beams are pointed to the position on the back of the heat sink where the LED chip is positioned until the brazing filler metal is melted. The method has the advantages that: the laser beams heat the position on the back of the heat sink where the chip is positioned to avoid oxidation and vaporization of the brazing filler metal; a plurality of chips can be attached on the position waiting for bonding in advance and then bonding can be conducted. The method can be applied to the field of LED chip packaging.

The invention provides a method for preparing ethanolamine hydrochlorides and a coproduct ethanolamine, which comprises the following steps: carrying out addition reaction on ammonium chloride, which is used as a raw material, and EO (ethylene oxide), adjusting to a proper ratio to firstly synthesizing MEA.HCl (monoethanolamine hydrochloride) and DEA.HCl (diethanolamine hydrochloride), and separating out the MEA.HCl by utilizing the differences of physical properties; continuing adding the EO into the filtrate, sealing the reaction kettle, and gradually heating to react, wherein the reaction pressure must be sufficient to prevent the EO from gasifying at the reaction temperature, and the reaction temperature can be raised to 100 DEG C or so, so that the conversion rate of the TEA.HCl (triethanolamine hydrochloride) is maximized; cooling to room temperature, filtering, and drying to obtain the TEA.HCl; and merging the washing liquid and the filtrate, and dehydrating to obtain the DEA.HCl. The ethanolamine hydrochloride can be respectively dissociated in the presence of sodium hydroxide or sodium methoxide to obtain the MEA, DEA and TEA according to market demands.

The embodiment of the invention relates to a beam shaping mechanism used for laser processing equipment. The beam shaping mechanism comprises a rotary wheel and one or more beam shapers, and the beamshapers are arranged on the rotary wheel and are used for shaping laser beams emitted by a laser. The rotary wheel is provided with a plurality of holes in the circumferential direction. The center lines of the holes are parallel to the center shaft of the rotary wheel. The distances between the center lines of all the holes and the center shaft of the rotary wheel are equal. The beam shapers arearranged at the holes. The optical axes of the beam shapers coincide with the center lines of the holes where the beam shapers are located. Through the beam shaping mechanism, the condition that a single-mode laser beam is not suitable for an actual workpiece is avoided, and laser processing efficiency and product quality are improved.

According to an dopant-injection method for injecting volatilized dopant gas into semiconductor melt in a crucible (31), the crucible (31) is rotated alternately clockwise and counterclockwise around a support shaft (36) extending in a flowing direction of the dopant gas, so that the dopant gas is blown against the semiconductor melt white the crucible is rotated. Rotating the crucible (31) causes convection currents in the semiconductor melt therein, thereby facilitating diffusion of the blown dopant in the semiconductor melt.

The invention discloses an ultralow temperature vacuum insulation quick connector and a production method thereof. The connector comprises a pull rod, a vacuum cavity, a first outer pipe, a second outer pipe, a third outer pipe, a piston rod, a first oil orifice, a cylinder and the like. The pull rod is integrated with a jaw. The pull rod can be connected with a piston pin through a connecting shaft. The vacuum cavity is located among the first outer pipe, the second outer pipe, the third outer pipe and an inner corrugated pipe. The first oil orifice is located at the front end of the cylinder. A second oil orifice is located at the rear of the cylinder. The cylinder is connected with the piston rod. A vacuum opening is connected with the third outer pipe and communicated with the vacuum cavity. A counter flange and a connecting flange are welded with two ends of the inner corrugated pipe respectively. A support ring is located in the vacuum cavity between the inner corrugated pipe and the third outer pipe. A guide plate and a guide rod are welded to an annular rotator and fixed on the first outer pipe. By the ultralow temperature vacuum insulation quick connector, fast and safe connection and separation of a pipeline or a loading arm with a tank-truck or a LNG (liquefied natural gas) ship during ultralow-temperature liquid loading and unloading are achieved.

The invention relates to a hydrocarbon oil catalytic cracking method which is characterized by comprising the following steps of: (1) carrying out first contact reaction on a hydrocarbon oil raw material and a first cracking catalyst in a lifting pipe reactor and carrying out first oil separation on a mixture of oil gas and a catalyst obtained after the first contact reaction; (2) carrying out a second contact reaction on the oil gas obtained after the first oil separation and a newly added second cracking catalyst in a fluidized bed reactor and carrying out second oil separation. The invention also provides hydrocarbon oil catalytic cracking equipment. On one hand, the problem of inadequate activity in the fluidized bed reactor, caused by the great reduction of the activity of the catalyst discharged out of the lifting pipe reactor, can be avoided, on the other hand, because the product obtained after reaction in the lifting pipe reactor is directly conveyed into the fluidized bed reactor without separation, the defect of increase of energy consumption, caused by repeated cooling and gasifying of feed materials can be avoided.

The invention discloses a PVA foaming material and a foaming method thereof. The foaming material is provided to overcome the difficulty of continuous extrusion foaming of existing. The hydrolytic characteristic of the PVA is utilized to make the PVA foamed at a temperature lower than the boiling point of PVA in a hydrolytic swelling state. Water is used as a medium, a micro-porous expansion foaming agent is added in a swelling state, and foaming is carried out at the temperature below the boiling point of the PVA, so that PVA gasification is avoided, extrusion molding is realized, and the operation process is simple; and a prepared finished product has the advantages of light weight (low density), high compressive strength (reaching up to 259 KPa), high degradable component content and environmental friendliness.

The invention belongs to the technical field of wood composite materials, and provides a preparation method of a magnesium-aluminum layered double hydroxide/graphene oxide/wood-based composite material, which comprises the following steps: immersing wood in an aqueous solution containing magnesium salt, aluminum salt and urea, and carrying out a reaction under low-temperature hydrothermal conditions; and carrying out vacuum drying on the wood for 12 h at the temperature of 50 DEG C, thereby preparing the magnesium-aluminum layered double hydroxide modified wood; adding graphene oxide into water, and carrying out mechanical stirring and ultrasonic treatment to obtain a graphene oxide suspension; dropping the graphene oxide suspension on the surface of the wood, drying the wood at 50 DEG C for 3 hours, and repeating the operations for 3-6 times. The composite wood with fire early warning and flame retarding functions is prepared by adopting a low-temperature hydrothermal reaction combined with a dripping method, the process is simple, the energy consumption is low, the material structure is stable, and meanwhile, the synergistic flame retarding effect of graphene oxide and inorganicmetal is realized.

The invention discloses a device for preparing clean coal by pyrolyzing, gasifying and semi-carbonizing a waste. The device comprises a material supply system, a material pre-treatment system, a thermal decomposition and semi-carbonization device, a combustion and gasification device, a food additive addition device, a clean coal cooling and collecting system and a synthesis gas reuse system, wherein the material supply system and the material pre-treatment system are connected, a food additive is arranged in the food additive addition device, both the food additive addition device and the material pre-treatment system are connected with the thermal decomposition and semi-carbonization device, both the synthesis gas reuse system and the thermal decomposition and semi-carbonization device are connected with the combustion and gasification device, and the thermal decomposition and semi-carbonization device is connected with the clean coal cooling and collecting system. The device for preparing the clean coal by pyrolyzing, gasifying and semi-carbonizing the waste is simple in structure, produces the clean coal by fully using the low-grade coal and the agricultural waste, and effectively saves the energy, the surface of the powdered coal is coated with an addition biomass, the combustion efficiency is stable, the gas emission is low, the spontaneous combustion is prevented, and the occurrence of fire and explosion is avoided.

The invention provides an instrument detection device. The instrument detection device comprises a control system, a sealing water tank, a water pump, a pressure stabilizing module, a water inlet valve, an instrument clamping device, a first cooler, a standard flow meter and a reversing valve, wherein the reversing valve comprises a first water outlet and a second water outlet; the first water outlet is connected with a water return port of the sealing water tank; a second cooler is connected onto the second water outlet; a weighing module is connected onto a water outlet of the second cooler; a control valve is connected onto a water outlet of the weighing module; a water outlet of the control valve is connected with the water return port of the sealing water tank; the sealing water tank is further connected with a turbocharging heating pump. With the adoption of the detection device, the accuracy and the durability of a heat meter can be detected, the accuracy and the durability of a water meter can further be detected, the heat meter or the water meter can be detected with a standard meter method as well as a weighing method, the device has multiple purposes, and the detection cost is relatively low.

The invention discloses a stirring and condensing device for preparing acrylic ester and silicon-acrylic compound emulsion. The stirring and condensing device comprises a rectangular outer box, a rectangular inner box, a stirring component, a condensing component, a throttling component, an electric heating tube, a separating plate and a liquid outlet pipe. The rectangular outer box is sheathed atthe outer side of the rectangular inner box. The rectangular inner box is provided with the stirring component. One side of the rectangular outer box is provided with the condensing component. The stirring component comprises a servo motor, a filtering plate, a rotating shaft a, a stirring rod, a first straight gear, a second straight gear, a third straight gear, an extruding wheel a, an extruding wheel b, a rotating shaft b and a rotating shaft c. The stirring and condensing device is beneficial to improve a dissolution rate of a material, and realizes more adequate contact between the materials;is beneficial to continuous condensing work, and capable of preventing gasifying solution because of an excessively high heating temperature, and transmitting heat through cooling liquid, enabling the condensing effect to be more uniform; and beneficial to reduce a flow rate of refrigerant fluid, and capable of enabling time of the refrigerant fluid remained in a spiral pipe to be longer, andimproving the refrigeration effect.

The invention relates to a ship and an LNG fuel gas supply system. The ship comprises a ship body, an engine and the LNG fuel gas supply system; the LNG fuel gas supply system comprises a liquid storage tank, a pressure pump, a gas storage tank and a gasification mechanism, the liquid storage tank is provided with a gas pipe and a liquid pipe, and an inlet of the gas storage tank communicates withthe gas pipe of the liquid storage tank; and a liquid inlet, a liquid discharging outlet and an exhaust port are formed in the pressure pump, the liquid inlet communicates with the liquid pipe of theliquid storage tank, and the exhaust port communicates with the gas pipe of the liquid storage tank and the inlet of the gas storage tank so as to selectively convey BOG in the pressure pump into theliquid storage tank or the gas storage tank. The liquid storage tank, the gas storage tank and the pressure pump are utilized to form a closed space with a fixed volume, the BOG is continuously increased in the closed space, the BOG is self-compressed by utilizing pressure between the BOG gas, peripheral pressure equipment does not need to be added, and the BOG can also obtain pressure required by combustion.

The invention relates to a control valve 1), in particular an angle control valve and double control valve, for extreme control applications, preferably for discharge or reduction for hot separators and vacuum distillation columns. The valve piston 12 and the valve head 13 are designed as one piece and consist of tungsten carbide. Furthermore, the control valve comprises different constructions across the entire control valve range. For example, the valve housing 100, the valve seat 6 and a packing retainer 14 are optionally shaped such that the inner hollow space tapers continuously from the valve inlet to the valve seat 6, which prevents evaporation upstream of the valve seat 6. Furthermore, the double control valve consists of a large sub-valve 36 and at least one small sub-valve 37, wherein the large sub-valve 36 is designed as an adjustable open-closed piston valve and the small sub-valve 37 is designed as a control valve.