67results about How to "To purify" patented technology

The invention discloses a gabion box ecological gabion river channel slope protection construction method. The gabion box ecological gabion river channel slope protection construction method is mainly characterized in that the defect that only the flood control function, the water diversion function, the drainage function, the impoundment function, the shipping function and the like of a river channel are often considered according to a traditional river channel slope protection structure, and the ecological function of the river channel is rarely considered is overcome. The gabion box ecological gabion river channel slope protection construction method includes the following steps that a cofferdam is constructed, a worktable is arranged, and a footing construction period is carried out; after gabion slope protection construction is over, gaps between surface course dimension stone are recharged with soil and watered, it is ensured that the gaps of dimension stone are filled with soil, and a dimension stone slope is covered by a layer of cultivating and planting soil; aquatic plants are planted underwater, and a lawn is planted on a bank of the river channel. According to a construction technology, water, cement and a formwork are not needed, and construction is convenient. The gaps between building stone can be manually or naturally filled with mud on earth, root systems of the plants can be deeply pricked into the slope through the mud between the building stone, so that engineering measures are combined with vegetation measures, and a soft overall protection face is formed. The requirements for water and soil conservation and environment greening are met, and therefore the original ecological environment is recovered.

The invention belongs to the technical field of ecological restoration and particularly relates to a water body ecological restoration method. The water body ecological restoration method comprises the steps that the water surface is cleaned, then submerged plants, emergent aquatic plants and floating-leaved plants are planted, and aquatic animals are put in. According to the water body ecological restoration method, sludge at the water bottom is treated with a plant blanket in-situ coverage method, root systems of the emergent aquatic plants are fixed with pollution-free clay, and a putting-in type planting method is adopted for the floating-leaved plants and the emergent aquatic plants. The aqueous plants can provide an adhesion symbiotic space for microorganisms, and provide a food source for aqueous animals, fish and shellfish are put in when the aquatic plants grow stably, and a rapid and simple water body forest system is formed. By means of the water body ecological restoration method, the effects of fixing sludge at the water bottom, restoring the natural ecological environment and maintaining the water to be clear permanently can be achieved; meanwhile, a dwelling site can be provided for fish and birds, and certain river landscape can be formed.

The invention relates to a cleaning robot with a purifying function. The cleaning robot comprises a shell, a motor is arranged at the bottom of an inner cavity of the shell, an air suction fan is connected to the right end of the motor through a rotary shaft, and a filtering net is arranged at the right side of the air suction fan and fixed to the bottom of the inner cavity of the shell; a dust collection box is arranged at the right side of the filtering net, and a dust collection pipe is connected to the right side of the dust collection box and fixed to one side of the shell; a dust collection head is connected to the bottom of the dust collection pipe, a water tank is arranged at one side of the motor, a water pump is arranged in an inner cavity of the water tank, and a driving motor is arranged at one side of the water tank and fixed to the bottom of the inner cavity of the shell; an activated carbon filtering plate is arranged above the motor and fixed to the inner cavity of theshell, a purifying chamber is formed in the top of the activated carbon filtering plate, and ultraviolet disinfecting lamps are arranged at both sides of the inner wall of the purifying chamber. The cleaning robot has a good cleaning effect, and can also effectively purify air.

The present invention relates to one microwave treater capable of purifying engine exhaust gas under the action of its microwve field and the metal catalyst used in the ceramic carrier of the microwave treater and its preparation process. The catalyst carried on the ceramic carrier to catalyst the exhaust gas pufiying chemical reaction includes the oxide of Cu, Ce, Mn, Co, V and other metals and noble metals. The catalyst can catalyze the reduction reaction of Co, HC, NOx etc. effectively while the microwave treater under the action of the microwave makes the carbon particles exhausted by the diesel engine and adsorbed onto the surface of the carrier to regenerate the catalyst. The present invention can solve the problem of exhaust gas pollution, raise efficiency of catalytic reaction and save energy.

The present invention discloses enzyme-linked immune kits for detecting chlorpyrifos residue in pesticide including antigenic enzyme label plate coated with antibody, enzyme labeled chlorpyrifos antibody working fluid, standard chlorpyrifos solution, substrate solution, substrate buffer solution, reaction termination liquid, condense washing liquid and sample diluted concentrated liquid. The present invention also discloses using method for detecting chlorpyrifos by said kits including steps of pretreatment of sample, detecting with kits, result process and analysis and so on. The kits provided by present invention employ directly competing enzyme-linked immunoadsorption analysis has merits of high sensitivity and good stability, is suitable for detecting chlorpyrifos residue in environment and farm products, and has importance practical significance.

The invention discloses photocatalyst furniture and a coating construction process thereof. A primer layer and a photocatalyst coating are sequentially arranged on the outer surface of the photocatalyst furniture from interior to exterior; the primer layer comprises polyether-modified silicone oil and a modified silane coupling agent, the mass ratio of the polyether-modified silicone oil to the modified silane coupling agent is 5:8, the thickness of the primer layer is 1-500 microns, and the thickness of the photocatalyst coating is 50-500 microns; the coating construction process of the photocatalyst furniture comprises the following steps: the surface of the furniture is cleaned; the surface of the furniture is coated with the primer layer by film formation equipment; the primer layer is dried; the surface of the primer layer is coated with the photocatalyst coating by the film formation equipment; the drying is carried out in a clean environment, and the photocatalyst coating curing is waited for being realized. The photocatalyst furniture can have the effects of purifying, bacteria resisting, deodorizing and fouling resisting on indoor air and is durable; the coating construction process is simple and easily understood in steps; a coated coating is firm and durable, and has low possibility of peeling off.

The invention discloses a new crystal form substance of a Dasatinib anhydrous substance and a preparation method thereof, belonging to the technical field of medicines. An X-ray powder diffraction pattern of the new crystal form substance has characteristic peaks at the following diffraction angles 2theta: 6.400+ / -0.2 degrees, 7.067+ / -0.2 degrees, 12.562+ / -0.2 degrees, 13.372+ / -0.2 degrees, 13.942+ / -0.2 degrees, 16.939+ / -0.2 degrees, 17.406+ / -0.2 degrees, 18.709+ / -0.2 degrees, 19.376+ / -0.2 degrees, 21.206+ / -0.2 degrees, 22.229+ / -0.2 degrees, 24.562+ / -0.2 degrees, 25.036+ / -0.2 degrees and 27.912+ / -0.2 degrees. The Dasatinib new crystal form substance prepared by the method has the advantages of high purity, stability, suitability for large-scale industrial production, and the like.

The invention discloses asphalt flue gas purification governance equipment. The equipment includes a flue gas shield, the flue gas shield is connected to a condensing device which is internally provided with a snakelike bent pipe, one end of the snakelike bent pipe is connected to the flue gas shield through a flue gas pipe, and the other end of the snakelike bent pipe is connected to a spraying tower; a mountain flour tank is arranged on the snakelike bent pipe outside the condensing device and connected to the snakelike bent pipe through a feeding mechanism, a solution pool is arrange belowthe spraying tower, a water pump is arranged in the solution pool and connected to a water pipe, the water pipe is connected to a spraying pipe which is horizontally arranged in the spraying tower, aspraying mechanism is arranged below the spraying pipe, the snakelike bent pipe is connected to the lower portion of the spraying pipe on the spraying tower, and an active carbon adsorption layer is disposed above the spraying pipe; a vent port is formed in the upper end of the spraying tower and connected to a dryer through a conveying pipe, the dryer is connected to an adsorption device, a fan is arranged at the bottom of the interior of the adsorption device, multiple porous plates are arranged above the fan, and the portions among the porous plates are filled with active carbon.

The invention provides a biological filter for an aquacultural sand bed. The biological filter comprises a filter container and a spray pipe. The surface and bottom of the filter container are both provided with a plurality of through holes. A second filter net wraps the outer surface of the filter container. A first filter net containing filter material is arranged in the filter container. The spray pipe is inserted into the first filter net. The bottom end of the spray pipe is immersed at the bottom of the first filter net. A portion of the spray pipe, inserted into the filter material, is provided with a plurality of water inlets. The bottom end of the spray pipe is closed. A duckbilled water outlet inclining to one side is arranged at the upper end of the spray pipe. The ends of the first filter net and the second filter net are both fixed to the spray pipe. An air inlet pipe is arranged on a portion of the spray pipe, which extends out of the filter container. The biological filter has the advantages that the biological filter is disposed in a culture pond, pollutant in the culture pond contacts with beneficial microbial films on the biological filter to achieve purification, stability in water quality is guaranteed, frequent water change is not needed, cost is saved, and survival rate of cultured aquatics is increased by 20%.

The invention discloses a porous host material for an artificial wetland and a preparation method of the porous host material, which belong to the technical field of water treatment. The method comprises the steps of: agitating 10-20% sandy clay with grain size being 0.5-1.5mm, 5-35% zeolite with grain size being 5-10mm, 5-10% rotten wood with grain size being smaller than 10mm, 5-35% grade I coal ash or grade II coal ash, 5-25% scrap iron with grain size being smaller than 5mm, 1-2% water reducer for buildings and 10-15% water by weight percentage at normal temperature uniformly to form a mixture; injecting the mixture into a spherical or brick mould, pressing at 80-120Pa / mm<2> for 1hour, demoulding, spraying water and wetting, and naturally airing and maintaining for 30-60 days to obtain the porous host material for the artificial wetland. The porous host material is higher in strength, has certain water permeability, and can replace cobblestones in the conventional artificial wetland to purify sewage.

The invention provides an economic wetland system for ottelia acuminata-macrobenthos for processing agricultural runoff. The economic wetland system comprises a pesticide removal tank and a wetland unit, wherein the pesticide removal tank is connected with a water outlet of an intake tank; straws are filled into a tank body of the pesticide removal tank; the wetland unit is connected with the water outlet of the pesticide removal tank; a clay waterproof layer, a substrate layer and a flooding layer are sequentially arranged on the bottom of the wetland unit from bottom to top; ottelia acuminata is planted on the substrate layer; spiral shells and the like are also fed to the wetland unit. The pesticides of the wetland unit are removed by the pesticide removal tank with the straws, and a carbon source is provided, so that microorganisms, the ottelia acuminata and the spiral shells in the wetland unit can form a good ecological cycle system. Thus, the wetland system can stably run for a long period of time. The ottelia acuminata and the spiral shells in the wetland unit have relatively high economic value, and the economic performance of the wetland can be further improved.

The invention provides a lime karst leachate regulation system which comprises a cylindrical sewage well and an annular filter channel arranged around the outer side of the bottom of the sewage well; the filter channel communicates with the bottom of the sewage well; the top surface and bottom surface of the filter channel are supported by a plurality of supporting plates; a casing tube is arranged in the sewage well; cement paste is grouted between the casing tube and the sewage well body; the communicating position between the bottom of the sewage well and the inner circumference of the filter channel is provided with a water-permeable tube; the leachate enters the filter channel via the wall of the water-permeable tube; the bottom surface of the sewage well is coated with cement; the filter channel is filled with rubble and sandstone; a filter unit is sheathed outside the water-permeable tube; the filter unit can thoroughly filter out sand in the leachate and reduce the block probability; and the filtered leachate can directly seep into the solution cavities of the ground and converge into the underground water, thereby facilitating the reutilization.

The invention relates to a method for purifying, enriching and detecting steroid hormones in blood, and belongs to the technical field of medical examination and analysis. A sample containing steroid hormones is prepared from a low-density three-point bonded C18 filler taking silica gel as a matrix, and purification and enrichment of steroid hormones in the sample are realized by optimizing parameters such as solvent dosage and leacheate proportion in the preparation process. The prepared steroid hormone sample is analyzed through liquid chromatography-tandem mass spectrometry under certain conditions, and multiple steroid hormones can be detected at the same time at a time. The method has the characteristics of good stability, high sensitivity, high recovery rate, simplicity, convenience and controllability in operation, capability of realizing automatic operation and the like.

The invention discloses a low-odor sterilizing micro-foaming spray-free polypropylene composite material and a preparation method thereof. The polypropylene composite material is prepared from high crystalline polypropylene, micro-ball foaming agent, scratch-resistant resin, low volatile substance adsorbent, encapsulated enzyme, nano photocatalyst, a lubricant, and antioxidant according to parts by weight. The low volatile substance adsorbent has very strong adsorption and can effectively prevent forming parts of the composite material from generating low volatile harmful gases; the encapsulated enzyme and nano photocatalyst can decompose the low volatile harmful gases of the material into harmless carbon dioxide and water; and the high crystalline polypropylene has lower density, higher elasticity and proper rigidity after micro-ball foaming treatment. The material prepared by the method has good mechanical property, is light, resists heat and aging, is weather resistant, scratch resistant, and antistatic, has low odor, and contains low TVOC, thereby being applied to fields like automotive interior and high-grade decoration.

The invention provides a system for capturing semi-volatile heavy metal in zinc-containing solid waste through high-temperature separation in cooperation with ammonium complexation. The system comprises a pretreatment unit, a gas treatment unit and a solid treatment unit, wherein the pretreatment system comprises a reduction oxidation device and a gas-solid separation device which are sequentiallyconnected, a gas outlet of the gas-solid separation device is connected with the gas treatment unit, a solid outlet of the gas-solid separation device is connected with the solid treatment unit, thesolid treatment unit comprises a leaching device, a purification device and an electrolysis device which are sequentially connected, the gas treatment unit comprises a gas absorption device, an absorption liquid inlet of the gas absorption device is connected with an electrolyte outlet of the electrolysis device, and an absorption liquid outlet of the gas absorption device is connected with the leaching device. By means of the system, full-amount recovery of zinc is achieved, no leaching residues are discharged, the purification effect is achieved, and guarantee is provided for obtaining the high-purity zinc.

The invention discloses air purification equipment for an air return port of a central air conditioner in the enclosed space. The air purification equipment comprises an air port variable-diameter frame, a machine body, a pre-filter net, an electrostatic adsorption module and a front baffle plate, wherein the air port variable-diameter frame is used for connecting the machine body on the air return port of a central air conditioning unit; the machine body is connected with the pre-filter net, the electrostatic adsorption module and the front baffle plate in order from an inner layer to an outer layer; and the electrostatic adsorption module comprises a shell and a plurality of electrode plates arranged along the shell from front to back, and the electrode plates are parallel. An air inletis formed in the front end of the shell, and air outlet is formed in the rear end of the shell. The plane with the electrode plates is parallel with the flowing direction of air in the shell. The airpurification equipment has the technical advantages of reasonable structural design, low resistance, high load capacity, high purifying rate, etc.

The invention relates to an automatic cleaning mechanism. The following scheme is provided: the automatic cleaning mechanism comprises a casing, a dust removing cover, an infusion plate, atomizing heads and the photovoltaic panel, wherein a sliding groove and a clamping groove are formed in the left side of the casing, the sliding groove is located at the upper end of the clamping groove, the dustremoving cover is arranged in the sliding groove, a cleaning groove is formed in the bottom end of the dust removing cover, a first motor is arranged at the right end in the cleaning groove, a rotating rod is arranged at the tail end of a motor shaft of the first motor, brushes are wrapped on the outer wall of the rotating rod, the infusion plate is fixed at the top in the cleaning groove, and the atomizing heads are arranged at the bottom end of the infusion plate. The outer wall of the rotating rod is wrapped and connected with the brushes, the brushes are attached to the surface of the photovoltaic panel, the top end inside the cleaning groove is provided with the plurality of groups of atomizing heads, the brushes are driven by a rotating mechanism to rotate so that the brushes can brush the photovoltaic panel, and the cleaning effect is achieved. Meanwhile, a moving mechanism drives the dust removing cover to move based on the photovoltaic panel, and a comprehensive automatic cleaning effect is achieved.

The invention discloses a low-odor sterilization micro-bubbling scratching-resistant nylon composite material and a preparation method thereof. The composite material is prepared from nylon 6, a compatilizer, a micro-sphere foaming agent, a starching-resistant resin, a low-volatile substance adsorbent, a wrapping treatment lytic enzyme, a nano photocatalyst, a lubricant, an antioxidant and a thermal stabilizer in parts by weight. As the low-volatile substance adsorbent in the material is particularly good in adsorption property, low-volatile substance harmful gases generated from parts made ofthe material can be effectively prevented; due to adoption of the wrapping treatment lytic enzyme and the nano photocatalyst, trace low-volatile harmful gasses generated from parts made of the material and low-volatile harmful gasses generated from ambient environments of the parts can be decomposed into harmless carbon dioxide and water. After microsphere treatment, nylon 6 has relatively low density and water absorption, relatively high elasticity, relatively excellent anti-shock pressure-resistant buffer thermal-insulating noise reduction and a relatively beautiful surface effect, and automatable lightening and humanized development tendency are met.

The invention discloses an aluminum alloy inswinging casement window. The aluminum alloy inswinging casement window comprises a window frame, a sash, an air filtering portion, an electromagnetic lock, an electric push rod, a detecting device and a server, wherein the sash is arranged in the window frame; the air filtering portion comprises three air filtering devices; each air filtering device comprises a box and a cover; an activated carbon filtering net, an HEPA (high-efficiency particulate air) filtering net and a dust filtering net are arranged in each box; the electromagnetic lock locks the window; a fixed end of the electric push rod is fixed on the window frame; a retractable end of the electric push rod is fixed on the sash; the detecting device comprises a temperature sensor, a humidity sensor, an LED (light emitting diode) display screen and a carbon monoxide sensor which are fixed on the window frame; the humidity sensor is connected with the LED display screen; and the server is electrically connected with the electromagnetic lock, the electric push rod, the temperature sensor, the LED display screen and the carbon monoxide sensor. The aluminum alloy inswinging casement window has functions of an existing window; and moreover, by the aluminum alloy inswinging casement window, carbon monoxide poisoning accidents can be effectively reduced, indoor air can be purified effectively, and living needs of people are greatly met.

The invention discloses a preparation method of an artificial wetland filling medium for treating coal mine wastewater. The medium is prepared from, by mass, 20-30% of local soil with the particle size of 0.5-1.5 mm, 20-35% of coal gangue with the particle size of 10-30 mm, 5-10% of straw, corn stalk or humus wood with the particle size smaller than 10 mm, 5-15% of grade-I pulverized fuel ash or grade-II pulverized fuel ash, 5-10% of peat, 1-2% of a water retention agent and a 1.0*10<9> / ml rhizobium bacterial liquid. The preparation method comprises the following steps that the local soil, thecoal gangue, the straw, the corn stalks or humus wood, the grade-I pulverized fuel ash or grade-II pulverized fuel ash, the peat, the water retention agent and the rhizobium bacterial liquid are uniformly stirred to form a mixed material; the mixed material fills a simple-combined mold, and the artificial wetland filling medium is prepared through natural shaping. The prepared artificial wetlandfilling medium for treating the coal mine wastewater is high in hardness and strength, construction is facilitated, gravels and sand in traditional artificial wetland can be replaced, existing materials are fully utilized, and the function of sewage purification is achieved.

The present invention relates to a panel control system of a purifying water tank. The system comprises a washing module selection unit and a plasma unit. The washing module selection unit is provided with a standard washing module, a double-washing module, a ultrasonic washing module and a fruit and vegetable washing module; the double-washing module is equipped with a standard washing module; the fruit and vegetable washing module is equipped with the ultrasonic cleaning module; the plasma unit comprises a control unit and a mounting portion of a detachable plasma generator; the plasma unit and the washing module selection unit are arranged in parallel on the control panel of the purifying water tank; and the mounting portion is provided with an electrode tank for storing the electrode tip of the detachable plasma generator. The system not only provides a variety of washing modes for the user, but also is equipped with the plasma generator for sterilization in washing; the system reduces the bacteria production in the washing process and strengthens the washing effect, can better purify the washing substances; and a variety of washing modes are corresponding to different wash intensities, and are more convenient for users to use; and targeted washing can save water and time.

The invention discloses an environment-friendly automobile maintenance spray room. The environment-friendly automobile maintenance spray room comprises a spray room body. A floor is arranged at the bottom of the spray room body. A spray vehicle frame is fixedly arranged on the upper end face of the floor. A fan is arranged in the middle of the top of the spray room body and is connected with an air circulation filter through an exhaust pipe. A filter screen is horizontally erected in the air circulation filter. A water supply tank is fixedly arranged on the side face of the spray room body. Awater pump is arranged on the upper end face of the water supply tank. A drip-washing pipe extends into the spray room body from the water pump. According to the environment-friendly automobile maintenance spray room, sludge generated by cleaning of the drip-washing pipe is gathered into a standing pipe through a sludge discharge pipe and stands until water and paint are layered; after the water and the paint are layered, substances on a paint layer are pumped out by means of a paint separation pump structure and then delivered into a recovery cylinder through a guide pipe so as to be recycled, ad resources are saved; and the environment-friendly automobile maintenance spray room is suitable for different working conditions and has better application prospects.

The invention discloses a low-temperature dust collection, desulfurization and denitrification system. The low-temperature dust collection, desulfurization and denitrification system comprises a desulfurization chamber and a denitrification chamber, wherein the denitrification chamber is formed at one side of the desulfurization chamber; a first connecting pipe is arranged between the desulfurization chamber and the denitrification chamber; a desulfurization charging valve and a denitrification charging valve are arranged on the first connecting pipe; the denitrification charging valve is arranged on one side of the desulfurization charging valve; a first rotating rod is arranged in the desulfurization chamber; first water bath pipes are arranged on two sides of the first rotating rod; first water bath holes are formed in the first water bath pipes; a first ring gear is arranged on the outer side of the end part of the first rotating rod; a first motor is arranged at the top of the desulfurization chamber. Ammonia water is used as a reactant, so that the ammonia water is subjected to a reaction with SO2 and NOx in mixed gas, a purifying effect is realized, sewage treatment is not needed after purification, manpower and money are saved, (NH4)2SO3 capable of being used as fertilizer can be also obtained, and accordingly, the effects of avoiding pollution and using waste are achieved.

The invention discloses a turtle culture pond which comprises a turtle culture pond body. A playing column is fixedly arranged at the bottom of an inner cavity of the turtle culture pond body, rest tables are arranged on two sides of the playing column and fixedly arranged at the bottom of the inner cavity of the turtle culture pond body, a filter screen is arranged at the bottom end of the playing column and fixedly arranged on the bottom wall of the turtle culture pond body, a pump and a purifier are arranged on one side of the outer wall of the turtle culture pond body, and the pump is arranged at the bottom end of the purifier. When a turtle is bred by the culture pond, places are provided for the turtle by the aid of the tops of the rest tables exposed the water surface, the turtle can sun and take the rest on the places, green plants are planted on the playing column, so the liquid can be purified, the air near the turtle culture pond body is humidified by atomized water sprayedby an atomizer, the height of the liquid level in the turtle culture pond body is controlled by a liquid level sensor, so that liquid surface cannot cover the rest tables, and rest of the turtle cannot be affected.

The invention relates to the technical field of spraying equipment, in particular to a spraying jig which comprises a bottom plate. A moving plate and a rotating plate are movably connected to the upper portion of the bottom plate, a circular plate is rotatably connected to the side wall of the moving plate, an annular plate is rotatably connected to the side wall of the rotating plate, and clamping blocks are symmetrically and movably connected to the annular plate and the circular plate; a spraying pipe is fixedly connected to the rotating plate, one end of the spraying pipe penetrates through the rotating plate and is located on the other side of the rotating plate, the spraying pipe communicates with a nozzle, a cavity is formed in the bottom plate, a purification box, a heater and a fan are fixedly connected into the cavity, and the purification box, the heater and the fan communicate with one another. According to the plastic pipe paint spraying device, peculiar smell generated when paint is sprayed to the inner side wall of a plastic pipe can be conveniently purified, and the nearby environment is prevented from being polluted.

The invention discloses an electric heating type desktop warmer with adjustable wind direction. The electric heating type desktop warmer comprises a shell, an air outlet is formed in one side of the shell, a heating box is arranged in the shell, elastic heat conduction pipes which are evenly distributed are fixedly connected to the outer portion of the heating box, the heating box is fixedly connected with the shell through the elastic heat conduction pipes, and heating wires which are uniformly distributed are fixedly connected to the interior of the heating box. The heat of the heating wires can be partially conducted to a heat conduction block through the elastic heat conduction pipes, at the moment, a user can place some things in a placing box, heating and heat preservation are conducted through the heat conduction block, a water cup is conveniently placed through a cup groove, water in the water cup can be heated and subjected to heat preservation, the elastic heat conduction pipes have certain elasticity and can be bent under certain force, so that the electric heating type desktop warmer can be buffered and protected when collision occurs, the effects of heating and heat preservation of objects are achieved, and the protection effect is achieved.

The invention discloses a purification smelting process of wear-resistant castings. The process comprises the steps that scrap steel, ferrochrome, ferromolybdenum, ferromanganese, ferrosilicon, ferrovanadium, ferrotungsten, ferro-nickel, ferro-hafnium and rare earth ferroalloy are selected as raw materials; the scrap steel is added into smelting equipment, after melting by 1 / 3-1 / 2, the ferrochromeand the ferromolybdenum are added for smelting, then the ferromanganese, the ferrosilicon, the ferrovanadium, the ferrotungsten, the ferro-nickel, the ferro-hafnium and the rare earth ferroalloy areadded for smelting, and a deoxidizing agent is added for purification and slagging-off; a diffusion deoxidizing agent is used for primary diffusion deoxidation, then ferrosilicon and ferromanganese are used for precipitation deoxidation, then the diffusion deoxidizing agent is used for secondary diffusion deoxidation, and the deoxidizing agent is used for final deoxidation to obtain deoxidized molten steel; the deoxidized molten steel is refined through an LF method to obtain refined molten steel; and the refined molten steel is discharged from a furnace and poured after the composition of therefined molten steel is adjusted. The purification smelting process of the wear-resistant castings is simple in operation and good in purification effect.

The invention discloses an energy-saving and environment-friendly oil-stone separation production device for a road old asphalt mixture, which comprises multiple separation tanks and a feeding device, wherein six separation tanks are arranged and are cylindrical; the separation tanks are uniformly distributed along the circumferential direction; a feed hole is formed in the top of each separation tank and comprises a feed pipe and a feed notch; each feed notch is positioned in the bottom position of each feed pipe and is an inclined pipe; the bottom of each feed notch is connected with the top feed hole of the separation tank; a separation pipeline is arranged at the bottom of each separation tank and is obliquely arranged; multiple screening devices are arranged in the separation pipelines; each screening device comprises a square screening box and a filtering net; multi-layer filtering nets are uniformly arranged in the screening boxes; totally five layers of filtering nets are arranged; the bottoms of the six separation pipelines are connected with a storage device; the storage device is of a structure which is wide in top and narrow in bottom, and the section of the storage device is conical; and an exhaust hole is formed in the bottom of the storage device. A six-in-one separation tank structural design is adopted, the separation efficiency is improved, and the oil-stone separation effect is greatly improved.

The invention discloses a filtering device for waste gas. The filtering device comprises a waste gas conveying pipe, wherein a waste gas filtering mechanism is arranged on the outer surface of one endof the waste gas conveying pipe. According to the filtering device for the waste gas, through the arrangement of a waste gas filtering box, a polyester fiber filtering net, a filtering cotton net andan activated carbon filtering net, impurities in the waste gas can be filtered out, and filtering effect is good; through the arrangement of a connecting pipe, a machine shell, a motor, a rotating shaft, a draught fan, a spraying filtering box, a water tank, a sodium hydroxide absorption liquid conveying pipe, a water pump, a liquid outlet pipe and a spraying pipe, waste gas purification is facilitated; through the arrangement of a water purification box, a water injection opening, purified water and a water discharging opening, secondary purification of the purified waste gas is facilitated,and purification efficiency is improved; and through the arrangement of a deodorization filter box, an ozone generator and an exhaust port, residual odor in the waste gas can be filtered, so the purpose of protecting the environment is achieved, and the device can be conveniently used by people.