20results about How to "Reduce carryover" patented technology

The multi-interaction-mode intermediate frequency furnace automatic slag salvaging mechanism comprises a guide rail, an industrial robot and intermediate frequency furnaces, the guide rail is used for bearing the industrial robot, the guide rail is installed between the two intermediate frequency furnaces, furnace openings of the two intermediate frequency furnaces are each provided with a furnace cover, and the interiors of furnace bodies of the intermediate frequency furnaces are used for storing molten iron; a coaxial slag salvaging mechanism is arranged at the tail end of the industrial robot, a slag salvaging spoon is arranged at the bottom of the coaxial slag salvaging mechanism, the slag salvaging spoon is used for salvaging slag, and a slag hopper used for storing the slag is arranged at the bottom of the slag salvaging spoon. The rotation angle of the stepping motor is controlled by an instruction sent by the control system, opening and closing of the slag salvaging spoon can be further controlled, the motion mode of the slag salvaging mechanism is unique and different from the prior art, the slag salvaging mechanism can salvage the slag to the maximum extent, and the problem that in the prior art, the slag salvaging spoon needs to be replaced every day is solved.

The present invention provides a high-quality high-carbon steel wire and a method for smelting all scrap steel thereof, and belongs to the technical field of steelmaking. The present invention systematically optimizes the all-scrap steel electric furnace smelting process, and reduces the amount of harmful elements such as nickel, chromium, copper, arsenic and molybdenum introduced by improving the type, size and matching method of the scrap steel entering the furnace in terms of raw materials. At the same time, in order to control the problem of difficult-to-control nitrogen content in steel caused by long-term power-on of all-scrap steel smelting in the electric furnace, a low-nitrogen carburizer is added to the scrap steel entering the furnace to increase the carbon content of the molten pool during electric furnace smelting, and at the same time, the furnace wall gun oxygen supply and carbon powder spraying process are optimized to improve the foam slag effect and reduce the nitrogen absorption of molten steel. A precise continuous casting and rolling control method is adopted to obtain highly homogenized ingots and high-quality wire rods, providing high-purity parent materials for high-end wire products. The present invention is used to produce high-cleanliness and high-homogenization wire products, and reduce the carbon emission level of the entire smelting process.

The utility model provides a kind of floating object removing equipment for sewage treatment, including grating conveyor, one end of the grating conveyor is provided with bottom backing plate, the other end of the grating conveyor is equipped with two mutually symmetrical conveyor end plate, transmission roller is rotatably installed on the bottom backing plate, the grating belt of the grating conveyor is driven and wound on the surface of transmission roller, the both ends of the bottom backing plate are respectively fixedly connected with height-adjusting plate;The utility model can flexibly adjust the height and angle of the device according to actual demand by setting through the cooperation of height-adjusting plate and mounting guide rail plate, so as to adapt to different sewage treatment scenarios.In addition, the design of positioning screw further enhances the stability of the device, keeps accurate position control during the sliding process of the extension slide, avoids the deviation problem caused by vibration or external force, and improves the flexibility of the equipment.

This utility model relates to the field of valve technology, and in particular to a two-way valve and an explosion-proof valve. The two-way valve provided by this utility model includes a housing and a fixed base forming an air exchange channel, and a first movable member and a second movable member. At least a portion of the first movable member passes through the second movable member and extends into the fixed base. The first movable member is axially movable relative to the second movable member and the fixed base. When the first movable member moves in a first direction, the air outlet channel communicates with a first gap. When the first movable member pushes the second movable member to move in a second direction, the air inlet channel communicates with the first gap. The movement of the first movable member within the air exchange channel forms separate air outlet and air inlet channels, precisely controlling the airflow direction, avoiding turbulence and backflow, improving exhaust efficiency, and adapting to airflow pressure requirements in different directions.

The utility model discloses a dust absorbing and filtering device for engineering construction in an ecologically fragile area. The dust absorbing and filtering device comprises a first air curtain machine, a rear shielding block, a first side shielding block, a second side shielding block, a negative pressure dust collector and a second air curtain machine, in the application, the top air curtain generated by the first air curtain machine is matched with the rear shielding block, the first side shielding block, the second side shielding block and the negative pressure dust collector to form a closed space, and then engineering construction related parts are all arranged in the space to prevent dust from overflowing; besides, an inlet and an outlet are formed in a first side shielding block, and a side air curtain is formed through a second air curtain machine to cover the inlet and the outlet, so that dust can be reduced when constructors and equipment leave the field, and pollution to the environment of an ecologically fragile area is reduced.

The invention relates to a low-melting high-impact polypropylene special material and a production process thereof. The problems of poor normal and low temperature impact resistance, low flexural modulus and fast catalyst activity attenuation of polymers in the prior art are mainly solved. The process comprises the following steps: step A, prepolymerization reaction: prepolymerizing a catalyst and propylene to generate a prepolymerization product under prepolymerization reaction conditions; step B, homopolymerization reaction: under the action of a catalyst, the prepolymerization product is subjected to homopolymerization reaction in a multi-zone circulation reactor, and polymer basic powder is obtained under polymerization process conditions; step C, gas phase copolymerization reaction: the polymer basic powder enters a gas phase reactor, and further reacts with propylene and ethylene by utilizing the residual activity of a catalyst to generate impact-resistant copolymer powder; and D, blending, extruding and granulating to obtain a target product. The low-melting high-impact polypropylene special material prepared by the process has excellent normal and low temperature impact resistance, high strength and good processability.

The invention provides a cleaning agent and a cleaning method of a matrix integrated target material. The cleaning agent comprises polyoxyethylene ether, vegetable oil acyl lactate, glutamate, a complexing agent, an anti-rust additive, a corrosion inhibitor and water. Wherein the mass ratio of the polyoxyethylene ether to the plant oil acyl sodium lactate is (1.5-2): 1; the mass ratio of the glutamate to the vegetable oil acyl sodium lactate is (0.2-0.6): 1, and the cleaning method comprises the following steps: mixing the cleaning agent and cleaning cloth according to the ratio of 5-8mL / piece of cleaning cloth, and cleaning the surface of the matrix integrated target material to obtain the cleaned target material. According to the invention, the cleaning turnover rate of the matrix integrated target material can be improved, and the reject ratio of abnormal products is reduced.

This application provides a bead-stringing fixture for the immersion nickel-gold process of printed circuit boards, belonging to the field of PCB manufacturing technology. The fixture includes an upper comb-tooth insert plate, a first non-elastic high-strength fishing line, a lower comb-tooth insert plate, a second non-elastic high-strength fishing line, and a third non-elastic high-strength fishing line. The frameless design of this fixture increases production capacity and reduces chemical carryover, thus saving costs and improving production efficiency. The use of high-strength materials ensures stability and corrosion resistance, guaranteeing the fixture's stability and durability during long-term operation, reducing maintenance frequency, lowering production costs, and providing a stable and durable structure. The upper and lower comb-tooth insert plates offer maximum capacity improvement, increased efficiency, and cost savings for immersion nickel-gold processes and multi-piece operations on gantry lines, making it highly adaptable.

The present invention relates to a double-cylinder steam drying system, which comprises a double-cylinder steam dryer and a steam heat exchange and air distribution device for providing hot air to the inside of the double-cylinder steam dryer. The inner cylinder body and the outer cylinder body of the double-cylinder steam dryer are both cylindrical and coaxially fixed. The inner and outer surfaces of the inner cylinder body are both provided with heat dissipation pipes, and the inner surface of the outer cylinder body is also provided with a heat dissipation pipe. A rotary joint is provided at the end of the multi-stage cylinder body group, and the rotary joint is used for air intake and water return. An air intake pipe group for introducing steam and a water return pipe group for discharging condensed water are provided between the rotary joint and the heat dissipation pipe. The air intake pipe group, the water return pipe group and the air guide pipe group of the present invention are all provided with flexible conduits. The precision requirements for processing and assembly are low, so the installation is convenient and quick, and the flexible conduit can compensate for uncontrollable variable stress, protect each pipeline and corresponding parts, reduce the failure rate, reduce the maintenance cost, improve the work efficiency, and facilitate the continuous production of the factory.

The utility model relates to the field of dry powder filling, in particular to a fire-fighting dry powder filling device which comprises a filling machine and a discharge pipe mounted on the outer side of the filling machine. The device further comprises a collecting assembly, and the collecting assembly is arranged on the outer side of the discharging pipe and used for collecting the dry powder in the discharging pipe after single-time filling in a centralized mode, so that the phenomena that the dry powder leaks and the follow-up filling amount is affected are reduced. Wherein the collecting assembly comprises a rotatable sealing cover, a collecting groove and a rubber ring, the collecting groove is formed in the sealing cover and faces a discharging end opening of the discharging pipe, the rubber ring is installed in the collecting groove, and a set of gaps distributed along the axis of the rubber ring are formed in the rubber ring; after single filling operation, dry powder remaining in the discharging pipe can be collected in a centralized mode, the leakage phenomenon of the dry powder is reduced, and the accuracy of the follow-up filling amount is guaranteed.

The utility model relates to the technical field of bread processing equipment, and discloses a stackable baking tray, which comprises a baking tray main body and an edge tray, an oil discharge groove is arranged at the edge position in the baking tray main body, a concave circular groove is arranged on the top surface of the edge tray, a positioning column is fixed at the bottom of the edge tray, and the positioning column is fixed at the bottom of the edge tray. The circular groove and the positioning column are located on the same vertical face, and the outer side wall of the baking tray body and the outer side wall of the edge tray are coated with Teflon coatings. The round grooves are formed in the top of the edge disc, the round grooves are circularly distributed into four groups, the positioning columns are fixed to the bottom face of the edge disc, the round grooves and the positioning columns are also circularly distributed into four groups, at the moment, the round grooves and the positioning columns are located on the same vertical face, and one positioning column falls into one round groove; and the four positioning columns fall into the circular grooves, so that the four positioning columns can be stacked upwards in sequence after being positioned, the purpose of facilitating stacking is achieved, the stability after stacking is improved, and therefore the stacking effect is well improved in the working process.

The utility model discloses a straw treatment device for edible mushroom cultivation, and belongs to the technical field of straw treatment. The sorting and conveying mechanism is mounted in the crushing box and comprises two groups of symmetrically mounted conveying belt assemblies; directional blocks which are matched with each other are arranged on the conveying surfaces of the two groups of conveying belt assemblies; the driving mechanism comprises a driving motor and a transmission system; the cutting mechanism is arranged at the downstream of the sorting and conveying mechanism and comprises a fixed cutter and a rotary cutter assembly matched with the fixed cutter; and the directional block and the speed difference of the two groups of conveying belt assemblies have a synergistic effect, so that the straws enter the cutting mechanism after being adjusted to be in a state that the axial direction is consistent with the conveying direction in the conveying process. According to the straw treatment device for edible mushroom cultivation, the two conveying belt assemblies operate at different linear speeds, the speed difference is formed, straw can be automatically adjusted to be in the state that the axial direction is consistent with the conveying direction and then enters the cutting mechanism, and the uniformity of the length of the cut straw is improved.

The invention discloses a VOCs-containing waste gas treatment method and device, and relates to the technical field of waste gas treatment.The VOCs-containing waste gas treatment method comprises the following steps that VOCs-containing waste gas is compressed, and compressed waste gas is obtained; atomizing the bacterial liquid capable of adsorbing VOCs by using compressed waste gas, settling, separating and filtering to obtain treated waste gas; wherein the pressure of the compressed waste gas is greater than the standard atmospheric pressure. Waste gas containing VOCs is compressed, so that the pressure of the compressed waste gas is larger than the standard atmospheric pressure, the content of the VOCs in unit volume of waste can be concentrated, the volume of the waste gas is reduced, then bacteria liquid capable of adsorbing the VOCs is atomized through the compressed waste gas, more VOCs in fine fog drops in the compressed waste gas are in full contact with strains in the bacteria liquid capable of adsorbing the VOCs, and the VOCs in the bacteria liquid capable of adsorbing the VOCs are removed. The concentration of reactants is improved, so that the reaction rate of strains and VOCs is improved, more VOCs are adsorbed and decomposed by the strains in the bacterial liquid within a certain reaction time, and the treatment efficiency of waste gas containing VOCs is improved.

The utility model provides a steam heating bin pretreatment device suitable for semi-solid hazardous waste, which comprises a steam generator, a steam output pipe, a steam chamber, an SMP mixing bin and a steam loop pipe, one end of the steam output pipe is connected with the steam generator, the other end of the steam output pipe is connected with the steam chamber, the steam chamber is positioned between the inner wall of the SMP mixing bin and a stirring shaft of the SMP mixing bin, and the steam loop pipe is connected with the steam chamber. The steam output pipe is arranged in the steam chamber and is arranged on the inner wall of the SMP mixing bin, one end of the steam loop pipe is connected with the steam chamber, the other end of the steam loop pipe is connected with the steam generator, the steam output pipe electric control valve is arranged on the steam output pipe, and the loop pipe electric control valve is arranged on the steam loop pipe. According to the device, through combination of steam heating and mechanical stirring, the problem that the semi-solid hazardous waste cannot be stirred and mixed uniformly due to high-temperature melting or low-temperature solidification in the pretreatment stage can be effectively solved, so that efficient pretreatment of the semi-solid hazardous waste with high temperature sensitivity is achieved, and the fluidity and uniformity of the semi-solid hazardous waste are improved.

The device comprises a reaction kettle 1, a kettle top condenser 2, a nitrogen compressor, a molecular distillation tower bottom feeding pump, a molecular distillation tower, a tower top condenser, a receiving tank A, a receiving tank B and a receiving tank C. The top output end of the reaction kettle is connected with the input end of the kettle top condenser through a pipeline; a bottom discharge hole of the reaction kettle 1 is connected with a material inlet of the molecular distillation tower through a tower bottom feeding pump; a top output port of the molecular distillation tower is connected with an input end of a tower top condenser; an output end of the tower top condenser is connected with an input end of a receiving tank B; according to the method, the methanol and the methyl methacrylate after ester exchange are separated in the ascending pipe at the top of the reaction kettle by adopting the hot nitrogen, and the content of the methyl methacrylate after separation is less than 10%, so that the problem that the methanol and the methyl methacrylate are difficult to separate due to azeotropy is solved, the carrying-out amount of the methyl methacrylate is reduced, and the conversion rate of the reaction is improved.

The application belongs to the technical field of metal processing fluid, and discloses a low-carbon biodegradable metal processing fluid, which comprises the following components in percentage by mass: 4-6% of isopropyl alcohol amine, 1-3% of nano silicon corrosion inhibitor, 2-5% of ternary carboxylic acid rust inhibitor, 0.5-2.5% of benzotriazole, 5-10% of 182 self-emulsifying ester, 4-6% of castor oil acid, 40-60% of DOTP, 4-8% of gelberol, 2-4% of ether carboxylic acid complexing agent, 2-5% of cashew phenol polyoxyethylene ether 5EO, 4-8% of cashew phenol polyoxyethylene ether 2EO, 0.4-0.6% of potassium hydroxide, and the balance of water. The low-carbon biodegradable metal processing fluid does not contain harmful substances, has excellent environmental protection performance, has good lubricity, and can be applied to the processing of metals such as copper, aluminum and its alloys, magnesium and its alloys, and has a good application prospect.

The present invention relates to a flexible air-conducting double-cylinder steam dryer, which comprises a frame and a multi-stage cylinder group rotatably mounted on the frame, wherein the multi-stage cylinder group comprises an inner cylinder and an outer cylinder coaxially sleeved on the outside of the inner cylinder, wherein the inner cylinder and the outer cylinder are both cylindrical and coaxially fixed, and heat dissipation pipes are provided on the inner and outer surfaces of the inner cylinder, and a heat dissipation pipe is also provided on the inner surface of the outer cylinder, and a rotary joint is provided at the end of the multi-stage cylinder group, which is used for air intake and water return, and an air intake pipe group for introducing steam and a water return pipe group for discharging condensed water are provided between the rotary joint and the heat dissipation pipe, and the air intake pipe group, the water return pipe group and the air guide pipe group of the present invention are all provided with flexible conduits, and the precision requirements for processing and assembly are relatively low, so the installation is convenient and quick, and the flexible conduits can compensate for uncontrollable variable stress, protect each pipeline and corresponding parts, reduce the failure rate, reduce the maintenance cost, improve the work efficiency, and facilitate the continuous production of the factory.

The invention relates to the technical field of metal etching solutions, in particular to an etching solution as well as a preparation method and an etching method thereof. The etching liquid comprises the following components in percentage by mass: 5 to 10 weight percent of hydrogen peroxide, 4 to 6 weight percent of nitric acid, 0.1 to 5 weight percent of hydrogen peroxide stabilizer, 0.1 to 5 weight percent of metal ion chelating agent, 0.01 to 5 weight percent of metal corrosion inhibitor, 0.3 to 0.5 weight percent of chlorinated diphenyl iodonium and the balance of water. In the etching solution, the content of hydrogen peroxide is low, and fluorine ions are not contained; the etching liquid has the advantages of being high in safety, good in stability, excellent in etching performance, capable of meeting the high-precision machining requirement and the like. When the etching solution is used for etching an etched sheet containing a copper-titanium metal film, uniform etching can be realized, the CD bias variation is less than 0.1 mu m, the etching CD and the slope angle are basically unchanged, and no surface metal residue and no titanium residue phenomenon exist.

The present invention relates to the technical field of rust-proof emulsified oil preparation equipment, and proposes a reactor and method for preparing rust-proof emulsified oil, including a reactor body with a mixing chamber, the mixing chamber with a feed port and a discharge port; a rotating shaft rotatably arranged in the mixing chamber; a stirring plate and a spiral drainage scraper are both arranged on the rotating shaft, and the stirring plate is located above the spiral drainage scraper; wherein the spiral drainage scraper has a spiral drainage surface, and the bottom of the spiral drainage scraper abuts against the bottom of the reactor body. Through the above technical solution, the problem that the traditional reactor in the prior art cannot quickly mix the emulsifier with the upper and lower layers of the base oil and the bottom attachment is difficult to clean is solved.

The invention belongs to the technical field of etching, and particularly discloses a silver film etching solution which comprises the following raw materials in percentage by mass: 30-40% of phosphoric acid, 5-10% of nitric acid, 5-10% of acetic acid, 0.01-0.05% of a porphyrin compound, 0.01-0.05% of a guanidine derivative, 5-10% of a dispersing agent, 1-5% of a stabilizer and the balance of water. The silver film etching solution provided by the invention has a stable etching rate, and can well solve the problems of silver residue, silver after-tack and the like at the same time.