192results about How to "Effective precipitation" patented technology

The invention discloses a high-strength high-conductivity copper-chromium-zirconium alloy and a preparation method of a plate / strip thereof. This alloy comprises the chemical composition: 0.01-1.5 wt% of Cr, 0.01-0.5 wt% of Zr, 0.001-0.5 wt% of Ti, 0.01-0.5 wt% of Mn, 0.0001-0.07 wt% of Ca, and the balance of copper and unavoidable impurities; the position and process of the Cu-Cr-Zr alloy are optimized, the provided high-strength high-conductivity copper-chromium-zirconium alloy retains high conductivity (above 80% IACS), elastic modulus up to higher than 130 GPa, softening temperature resistance up to higher than 500 DEG C, yield strength up to higher than 550 MPa and hardness up to 160 HV, the copper-chromium-zirconium plate / strip is imparted high strength, high conductivity and excellent comprehensive performance, this comprehensive performance meets the requirements of products such as a lead frame and a connector upon base material stamping and machining performances, and this plate / strip material is mainly applied to electronic components such as connectors and lead frames.

The invention discloses a domestic shoe washer. Shoes are placed in a cage type rotary disc or on a shoe rack of a support type rotary disc for rotating and vertically-vibrating washing in an inner cylinder, and dirt on the shoe sole and shoe vamp is removed through constant rinsing and flushing and precipitated into a sand filtration cavity. The domestic shoe washer also has an ultrasonic cleaning function, a rotation dewatering function and a drying function. By arranging an ultraviolet germicidal lamp and ozone degerming equipment, bacteria in shoes can be effectively killed while shoes are cleaned. The domestic shoe washer is convenient to use and sanitary.

The invention discloses an air foam slug flow driving process for the oil recovery of an oil field, comprising the following steps of: 1 determining type and proportion of the used foam liquid, slug volume ratio and on-site injection manner of the used air and the foam liquid during the air foam slug flow driving by an indoor test; and 2 carrying out the air foam liquid slug flow driving on site,wherein the oil flow driving process comprises the following steps of: preparation before the oil flow driving; slugging a pad fluid; slugging the air foam; alternatively injecting the air and foam liquid slug from a specially manufactured device to a target well for many times; and continuously carrying out the oil flow driving on the target well by a water or air injection method according to the dynamic change condition of the target well and a conventional oil displacement method after the injection of the air foam slug is finished. The invention has the advantages of reasonable design, simple and convenient construction steps, good use effect and convenience of realizing, can effectively solve various practical problems of poor water injection effect, difficult improvement on the water injection capability, poor oil flow driving efficiency and the like during the ultralow reservoir waterflooding.

The invention relates to super-thick EH36 steel for an offshore wind power pipe pile. The super-thick EH36 steel for the offshore wind power pipe pile comprises the following chemical components in percentage by mass: .015 to 0.18 percent of C, 0.15 to 0.30 percent of Si, 1.40 to 1.60 percent of Mn, less than or equal to 0.0070 percent of P, less than or equal to 0.0030 percent of S, 0.050 to 0.070 percent of Nb, 0.015 to 0.030 percent of V, 0.08 to 0.020 percent of Ti, 0.030 to 0.050 percent of Al, 0.15 to 0.40 percent of Ni, 0.10 to 0.20 percent of Cr, and the balance of Fe. A production process flow comprises the following steps: performing converter operation, performing LF refining, performing vacuum degasifying, performing Ca treatment, performing continuous casting, dehydrogenizing, rolling, performing air cooling, performing high-temperature hot straightening, and normalizing. According to the production process flow, the super-thick EH36 steel of 90 to 120 mm for the offshore wind power pipe pile, which is high in unit weight, high in strength, high in impact toughness, small in thickness tolerance and high in straightness and does not have a surface defect is obtained.

The invention provides a pitting field and hedgerow combined farming mode and a structure thereof. According to the invention, the upper and lower edges of a slope-surface land parcel are provided with permanent slope-protecting ridges; gutters are dug at the outer sides of the ridges and at the left and right sides of the slope-surface land parcel; the gutters are interconnected to form a slope-surface gutterway; horizontal interception ditches with equal altitude are dug in the interior of the slope-surface land parcel from top to bottom according to critical slope length which leads to rill erosion, so the slope-surface land parcel is divided into a plurality of farming districts with equal length; ridges and furrows are constructed along slope direction in the farming districts; the downslope furrows, the interception ditches with equal altitude and the slope-surface gutters are communicated to form a slope-surface water drainage network; downslope furrow pitting field earth ridges and equal-attitude interception ditch pitting field earth ridges are constructed in the downslope furrows and the interception ditches at same intervals, thereby forming downslope furrow pitting fields; and cross slope ridges with equal altitude are constructed at the middle parts of the farming districts, and water-retaining plants are planted on the ridges to form ridge hedgerow. The combined farming mode provided by the invention has the advantages of simple operation, low cost and substantial control effect on water and soil loss.

The invention relates to 7000 series aluminum alloys, in particular to a heat treatment method capable of reducing stress of spray-formed 7000 series aluminum alloy products. The heat treatment method comprises a two-stage solid solution treatment step and an artificial ageing treatment step sequentially and is characterized in that after the artificial ageing treatment step and before rough machining or after the rough machining and before finish machining, high-temperature stress-relieving aging is performed, that is, heat preservation is performed at the temperature of 125-155 DEG C for 8-32 h. The heat treatment method can maintain the higher strength level of the spray-formed 7000 series aluminum alloy products, reduce residual stress efficiently and improve the comprehensive performance of the products, the problem of cracking of the products in follow-up machining process is solved, machining deformation of the products is reduced, the machining efficiency is improved, and the dimensional precision is improved.

The invention discloses a method for detecting chloride ions in polyisobutylene and belongs to a detection method of a halogen element, especially to a detection method of a chlorine element in a high-molecular polymer. The method for detecting chloride ions in polyisobutylene mainly comprises the following steps of: (1) polyisobutylene pretreatment: letting a polyisobutylene sample embrittle at low temperature in liquid nitrogen and grinding the sample into particles with the particle size being 100-200 microns; (2) letting the sample combust in an oxygen combustion bottle containing an absorption solution by charging oxygen, and letting chloride ions be fully absorbed by the absorption solution; (3) detecting the content of chloride ions in the absorption solution by the potentiometric titration method; (4) calculating the content of chloride ions in polyisobutylene. By adopting the liquid-nitrogen quenching method, polyisobutylene becomes a brittle solid and is processed into particles with small size to guarantee the complete combustion of polyisobutylene and the effective precipitation of chloride ions, so as to make it possible to precisely detect the content of chloride ions in the polyisobutylene polymer. The technical scheme provided by the invention is also suitable for the detection of chloride ions in other polyolefin polymers.

The invention discloses a workshop sound-absorbing wall including a front pressing plate, a sound-absorbing cotton layer, sound insulation foam and a rear pressing plate; the front pressing plate, the sound-absorbing cotton layer, the sound insulation foam and the rear pressing plate are sequentially overlapped; the sound-absorbing cotton layer is wave shaped, a sound absorption cavity is respectively formed by the curved part of the sound-absorbing cotton layer and the front pressing plate and the sound insulation foam; and the front pressing plate is provided with a through hole communicated with the sound-absorbing cotton layer. The beneficial effects of the workshop sound-absorbing wall are that: during incidence of the indoor noise into the sound-absorbing wall, the indoor noise enters into the sound-absorbing wall by the porous front pressing plate, and passes through the cavity, the sound-absorbing cotton layer and the sound insulation foam, different frequency of noises generated by factory production can pass through different mesons to achieve the purpose of noise reduction, at the same time the internal cavity can effectively precipitate dust in the air, and the noise pollution and dust pollution can be simultaneously treated.

The invention discloses a new method for preparing solid lignin quaternary ammonium salt. Epichlorohydrin is added into tertiary amine, and a glycidyl quaternary ammonium salt intermediate is obtained after a reaction; on the condition that an initiating agent exists, the intermediate reacts with alkali lignin; then a reactant is added into a polarity organic solvent, and a precipitate is the solid lignin quaternary ammonium salt. According to the new method for preparing the solid lignin quaternary ammonium salt, the raw materials and reagents are easy to obtain, the reaction path is short, the reaction condition is moderate, and postprocessing is simple. The invention further discloses the application of the solid lignin quaternary ammonium salt obtained through the method.

The invention relates to the technical field of building materials, in particular to an inhibitor capable of inhibiting efflorescence of alkali-activated slag cement and adjusting the performance of the alkali-activated slag cement, and a preparation method of the inhibitor. The alkali-activated slag cement efflorescence inhibitor is characterized by being prepared from the following raw materials by mass percent: 10-30% of zeolite, 10-20% of silica fume, 20-30% of pulverized fuel ash, 5-15% of boric acid and 5-55% of superfine slag powder. The alkali-activated slag cement efflorescence inhibitor provided by the invention is simple to prepare and use, and has a certain retarding effect; after the efflorescence inhibitor is added into alkali-activated slag cement concrete and mortar, the working performance of the alkali-activated slag cement concrete and mortar can be improved, the engineering quality is improved after construction, the early strength and later strength of the alkali-activated slag cement concrete can be increased by 15-20%, the efflorescence probability of the alkali-activated slag cement concrete is greatly reduced, and the reduction magnitude reaches up to 80%; the alkali-activated slag cement efflorescence inhibitor can inhibit the efflorescence phenomenon of the alkali-activated slag cement after construction, and has an inhibiting effect on the efflorescence phenomenon of the building materials after construction.

The invention relates to a low-temperature welding technology of low alloy bridge steel. The technology comprises the steps of processing welding bead grooves, preheating before welding and insulating after welding, and is characterized in that high temperature resistant ceramic backings are adhered at the bottom of ''Y-shaped'' groove welding beads of two butted parent materials of the low alloy bridge steel; a double-side formation with one-side welding is adopted by the welding; meanwhile, an insulation rockwool is adopted; and an automatic temperature control heating tape is used for carrying out the preheating before welding, the temperature control during welding and the preheating, the temperature control and the insulation after welding, and finally carrying out retarded cooling. The technology has the advantages that: as the heat automatic temperature control heating tape and a thermocouple temperature measurement probe are adopted, the accurate control can be conducted on the temperature and the time of the preheating before welding, and the insulation and the retarded cooling after welding at different thicknesses and different environmental temperatures of the steel, thereby ensuring effective precipitation of hydrogen. Furthermore, the occurrence of low-temperature welding cold cracks and low-temperature brittle phenomena can be avoided effectively.

The invention relates to a gutter inlet structure with a water filtering bucket, belonging to the technical field of drainage facilities. The gutter inlet structure comprises a water storage well lower than the rod surface, wherein a rainwater inlet is arranged on the top surface of the water storage well, a rainwater outlet leading to a water outlet pipe is arranged in the middle inside the water storage well, a water filtering bucket structure is arranged on the rainwater inlet, and comprises a water bucket body, a support flange on the top of the water bucket body, and a plurality of water filtering holes on the wall of the water bucket body, and a plurality of overflow holes are formed in the upper part of the water bucket body, and positioned above the water filtering holes. According to the invention, the water filtering bucket structure is arranged, so that dregs can be conveniently intercepted; a water filter bucket is taken from a gutter inlet, and contaminants are removed in time; the water filtering bucket structure is provided with the overflow holes, so that flood can be prevented during rainstorm; and sediments in the rainwater can be effectively precipitated.

The invention provides a rice drying and screening device. The rice drying and screening device comprises a lifting bin, a movable bottom plate is arranged on the bottom of the lifting bin, a liftingmechanism is further arranged in the lifting bin, a lifting bin outlet is formed in the top of the lifting bin, and the lifting bin outlet is matched with a material inlet of a drying and screening bin. The drying and screening device is internally provided with a first screening blower and a second screening blower in sequence, and a division slope matched with the second screening blower is arranged in the middle in the drying and screening bin. A drying inlet and a screening pipeline are arranged on the two sides of the division slopes respectively, a vibrating drying plate is arranged below the drying inlet, and a drying blower is further cooperatively arranged on the left side of the vibrating drying plate. A backflow pipeline and a finished product pipeline are arranged on the bottomof the drying and screening bin, the screening pipeline is communicated with a dust pipeline and a crushed leaf pipeline, and the dust pipeline is communicated with a dirt collection pond. Through the movable bottom plate, rice is more sufficiently lifted; through the screening blower, dust and crushed leaves are effectively separated from the rice; due to the vibrating drying plate, the rice more smoothly falls down and is more uniformly heated; through the backflow pipeline, the rice is circularly dried and screened, the operation quality is higher, and small stones can be effectively removed; due to the dirt collection pond, dust can be effectively precipitated, and pollution to air is reduced.

The invention discloses an elution and restoration device for heavy metal contaminated soil. The elution and restoration device comprises a machine frame, a driving device, a crushing device and a soil elution device, wherein the crushing device comprises a crushing rotating cylinder and a crushing mechanism arranged inside the crushing rotating cylinder, the crushing rotating cylinder is transversely arranged and is rotationally arranged on the machine frame, the soil elution device is arranged right below the crushing rotating cylinder, crushed soil particles are transited into the soil elution device through a feeding and discharging port, moreover, an elution solvent is contained in the soil elution device, and the soil elution device is used for eluting and restoring the soil particles. According to the elution and restoration device for the heavy metal contaminated soil and a restoration and treatment method of the heavy metal contaminated soil, the soil particles can be fully crushed, the soil particles can be timely eluted and repaired, and the restoration degree of soil elution restoration can be improved.

The invention provides a data processing method and a data processing device. The data processing method comprises the steps that an operating activity is put in training samples, and the operation activity result of each user in the training samples is acquired, wherein the training samples are selected in the existing users, the training samples include at least one user, and each user includes at least one existing feature dimension; a training model is established according to the operation activity result of each user and the corresponding value of the existing feature dimension, and result of the training model is acquired; the operation activity results of other users apart from the training samples are predicted according to the result of the training model; and the operation decision is made according to the prediction result. According to the method, the efficiency can be enhanced, the value of big data can be fully mined and the effect of the operation activity can be effectively precipitated.

The invention relates to a composite packaging film forming process which has a technical key point of comprising the following steps: a, feeding; b, raw material extruding; c, raw material mixing; d, tape-casting; e, thin film thickness measuring; f, electrode corona; g, tempering; h, trimming; and I, finished product recovering. The invention further relates to a making device of a composite packaging film. The making device comprises an extruder, a raw material mixer, a tape-casting unit, a thickness-measuring unit, a corona unit, a tempering unit and a winding unit, wherein a raw material adding hole, an extruding cavity and an extruding rod are arranged on the extruder; a raw material reflowing hole is formed in the raw material mixer; the tape-casting unit is arranged at one side of the raw material reflowing hole, and a cooling traction roll is arranged on the tape-casting unit; a corona guide rotary roll and a high-voltage electrode are arranged on the corona unit; a plurality of heating rotary rolls are arranged on the tempering unit; a cutter device and a winding roll arranged at one discharging side of the cutter device are arranged on the winding unit. The composite packaging film forming process is simple and is high in yield; the making device is simple in structure and can be used for preferably precipitating a smooth opening agent.

The invention discloses organic environment-friendly straw fertilizer and a preparation method thereof. The organic environment-friendly straw fertilizer is prepared from the following raw materials in parts by weight: 40 to 50 parts of modified waste straw, 0.5 to 0.7 part of efficient fermentation bacterium agent, 20 to 40 parts of livestock excrement, 5 to 7 parts of rare-earth inorganic salt,10 to 20 parts of insecticidal traditional Chinese medicine waste residues, 15 to 25 parts of slow-release filling soil, 10 to 20 parts of improvement filler, 5 to 9 parts of tackifier and 20 to 30 parts of water. By adopting the organic environment-friendly straw fertilizer, the straw residue problem is effectively solved and the organic environment-friendly straw fertilizer has abundant nutrients and is easily absorbed by root systems of plants; the organic environment-friendly straw fertilizer has the effects of improving soil and strengthening roots, can be used for adjusting the potentialof hydrogen of the soil, killing insects and inhibiting bacteria, and has a good fertilizer efficiency slow release effect and no harms to the environment; the preparation method is simple and convenient and has relatively high practical value and a good application prospect.

The invention provides a method for constructing a directly-buried heat-preservation pipeline passing by a marshland section. The method comprises the steps that a marshland is filled with coal gangue so that an operation face can be formed, a groove used for enabling the heat-preservation pipeline to be directly buried is dug in the operation face, pebble replacement and filling are conducted on the part of sludge at the bottom of the groove, and a pebble replacement and filling layer allowing underground water to flow through is formed at the bottom of the groove through replaced and filled pebbles; the water level at the bottom of the groove does not exceed the pebble replacement and filling layer and a medium-coarse sand layer is laid between the pebble replacement and filling layer and the laid pipeline; an anchor block foundation ditch is dug in the groove; after the medium-coarse sand layer is dried, the pipeline is installed in the groove, and butt joint welding is conducted on the pipeline; an anchor block is installed in the anchor block foundation ditch and used for fixing the pipeline placed in the groove; after butt joint welding is accomplished, the groove is backfilled. According to the method, the problems that the pipeline bears force in the sludge, the pipeline cannot effectively operate in a normal life cycle, the pipeline floats when water does not pass by, and the pipeline is long in construction period are solved.

The invention discloses a method for refining kernel oil of lacquer tree seeds. The method comprises the steps of: lacquer tree seed freezing, peel-nucleus separation, screening, pressing, leaching, desolvation, extraction and merging, desolvation is conducted through a membrane evaporator by using a high-vacuum membrane evaporation mode, and extraction is conducted through supercritical carbon dioxide extraction. The invention also provides the lacquer tree seed kernel oil prepared by using the method, and the method for refining the kernel oil of lacquer tree seeds has a simple and convenient process; the lacquer tree seed kernel oil extracted by using the method has high purity, and denaturation of free urushiol is avoided, so that the color, quality and use performance of the oil are good, the production cost is greatly reduced, and the refining loss rate of the lacquer tree seed kernel oil is reduced; and therefore, the method is suitable for large-scale industrial production.

The invention discloses a circularly cleaning hospital bed with water for medical care in the technical field of medical care. The circularly cleaning hospital bed comprises a bottom plate, wherein asupporting column, a filtering tank, a water storage tank, a water pump, a heating device and a hydraulic device are sequentially arranged at the top of the bottom plate from left to right, an annularwater outlet channel is formed in the top of a bed body, a collecting tank is installed at the bottom of the left side of the bed body, a filtering plate is inserted and connected in an inner chamberof the collecting tank, a drain pipe is installed at the top of the collecting tank, the other end of the drain pipe is connected with the filtering tank, the right side of the filtering tank is connected with a water tank through a guide pipe, a water outlet pipe is installed on the right side of the water tank, a heater is installed at one end, far away from the water tank, of the water outletpipe, a water outlet hose is installed at the top of the heater, and a spraying disk is installed at the top of the water outlet hose. The device has a good filtering effect, and filtered sewage enters the water tank for recycling, so that water resources are saved; the bed is convenient and quick to clean, the labor intensity of medical staff is reduced and the comfortable sensation of a patientis improved simultaneously.

The invention discloses a catering oily wastewater treatment system. A filter separator is mounted in a main body box, a filter inclined tube is mounted on an inclined tube fixing plate, a filter box body is mounted at one side of the main body box provided with a water outlet pipe, comprises a filter cover plate, filter separator handles, an ABS (Alkyl Benzene Sulfonate) filter core, ABS filter core separators, a sealing ring, a PP (PolyPropylene) cleaning ball, a PP cleaning ball separator, a biochemical treatment layer and a plum filter mesh, wherein the ABS filter core separators are mounted in the center of the filter box body, the PP cleaning ball separator is arranged at the bottom of the filter box body, the PP cleaning ball is arranged on the PP cleaning ball separator, the biochemical treatment layer is vertically mounted at one side of the filter box body provided with the water outlet pipe, a scummer is welded in the PP cleaning ball separator, a sand filter cylinder is divided into an upper layer and a lower layer, fiber filter balls are arranged below, quartz sand is arranged above, and a scummer is mounted at the bottom of a water inlet pipe. The capacity of an adjusting tank is expanded by the device which ensures the discharge quality by multi-treatment and has simple structure, strong treatment capability and high separation effect and discharge quality.

The invention discloses a treatment method and system for waste lye. The treatment method comprises the following steps: removal of organic matters: removing organic matters in the waste lye to obtainlow-organic waste lye; salting: mixing an organic solvent and the low-organic waste lye to separate out inorganic salt which is insoluble in the organic solvent from the low-organic waste lye in order to form a solid-liquid mixture; performing solid-liquid separation on the solid-liquid mixture to obtain solid-phase inorganic salt and waste lye containing the organic solvent; and recovery of theorganic solvent: separating the organic solvent from the waste lye containing the organic solvent to obtain a lye solution. Compared with the prior art, the treatment method and system for the waste lye disclosed by the invention has the advantages that a high-purity hydroxide lye solution can be obtained, and hydroxide resources in the waste lye are recycled effectively; moreover, the whole system is easy to operate; the energy consumption is low; and pollution and plugging are not prone to occur.

The invention discloses textile fabric dyeing equipment which comprises a case, a feeding opening, a discharging opening, a cloth discharging roller, a cloth collecting roller, a mounting seat, dust-sticking rollers, cloth guide rollers, a bearing, a mounting rod, a gear, a tooth top, fan blades, a squeeze roll, an air pipe, an air hole, a hot-air blower, a mounting cavity, a heating wire and supporting legs, wherein the feeding opening is formed in the left side of the case; the discharging opening is formed in the right side of the case; the cloth discharging roller is arranged on the left side of the feeding opening; the cloth collecting roller is arranged on the right side of the discharging opening; two tangential dust-sticking rollers are arranged on the inner side of the feeding opening from top to bottom; the rear end of a rotating shaft of each dust-sticking roller is connected with the side of the feeding opening by virtue of the mounting seat; three cloth guide rollers in V-shaped distribution are arranged inside the case. Compared with the prior art, the textile fabric dyeing equipment has the advantages that textile fabrics can be efficiently and rapidly dyed and dried, the efficiency and effect of dyeing the textile fabrics can be improved, the labor intensity of workers is reduced, and great convenience is brought to textile processing.

The invention relates to a clarification method for honey. In the method, egg white powder and bentonite are used as a clarifier; steps of heating, filtration treatment and the like are matched; the precipitate in the honey is removed; and the processing method of clarifying the honey is realized. In the invention, the egg white powder and the bentonite, serving as the clarifier, are applied to clarification treatment of the honey, so that impurities in the honey are favorably adsorbed and precipitated, and the appearance and the color of the honey are improved; and through the heating and the filtration treatment, the stability of the honey product is enhanced, and the shelf life of the honey is prolonged. By using the method, the conventional single food processing clarification mode ischanged, a new approach for clarifying the honey is developed, and reference is provided for further research and development of the honey and processed products thereof.

The invention provides a soil remediation agent applied to salinized land and a preparation method thereof. The soil remediation agent comprises high-molecule organic acids, high-molecule organic acid potassium or high-molecule organic acid calcium, active functional bacteria, water-retaining agents, soil penetrating agents and other additives. According to the soil remediation agent, the solubility of calcium sulfate and calcium carbonate in the soil can be improved and cured calcium ions can be activated through combination of complexation of high-molecule polymers, sedimentation and separation of the soil penetrating agents on saline and alkaline ions in the soil and activation of microorganisms on the soil; the activated calcium ions are used for replacing sodium ions absorbed by soil colloid through ion exchange action; the replaced sodium ions are combined with negative functional groups to form water-soluble complex; the water-soluble complex enters below plowing layer along with irrigation water; the harm to the growth of crops is avoided.

The invention discloses an environment-friendly wastewater treating agent and a preparing method thereof. The environment-friendly wastewater treating agent is prepared from, by weight, 12-16 parts of bamboo vinegar, 16-18 parts of propylene amide, 20-24 parts of diethylenetriamine, 16-20 parts of sodium silicate, 16-18 parts of sodium lignin sulfonate, 10-12 parts of tannin, 12-18 parts of active carbon, 18-20 parts of potassium nitrite, 10-16 parts of polyaluminum chloride, 8-12 parts of ammonium persulfate, 12-18 parts of water glass, 16-22 parts of ferrous sulfate, 12-18 parts of sodium acetate, 10-12 parts of triethanolamine and 16-18 parts of zeolite. The environment-friendly wastewater treating agent is environmentally friendly, nontoxic, high in purifying speed and good in purifying effect.

The invention belongs to the field of wastewater treatment, and concretely to a method for treating potassium chloride cyanide-free cadmium plating wastewater. The method comprises the following steps: S1, adjusting the pH value of the wastewater, and adding an aqueous solution of sodium pyrosulfite; S2, adding an aqueous solution of sodium diethyldithiocarbamate, and adjusting the pH value of thewastewater; S3, adding a flocculant to make precipitated particles aggregate, and separating the precipitated particles from the wastewater; S4, adding hydrogen peroxide to the wastewater; and S5, adjusting the pH value of the wastewater treated in step S4. The method significantly reduces the content of cadmium and chromium in the potassium chloride cyanide-free cadmium plating wastewater to make the wastewater discharge meet the requirements of national standards, and is suitable for original wastewater treatment and discharge systems in existing electroplating workshops of enterprises.

The invention relates to a preparation method of crystallite glass, in particular to a preparation method of crystallite glass with a low expansion rate. According to the specific technical scheme, the preparation method comprises the following steps: weighing glass raw material, evenly mixing the raw material and putting into a crucible; heating up to 1550 DEG C, carrying out heat preservation for 4h, cooling to 1450 DEG C and carrying out heat preservation for 1h; carrying out annealing treatment for 5h at the temperature of 680 DEG C to obtain base glass; and then carrying out coring and crystallization, wherein the coring temperature is 750 DEG C, the coring time is 1h, the crystallization temperature is 1075 DEG C, and the crystallization time is 1.5h. The production method provided by the invention is capable of effectively separating out cordierite and reducing the expansion factor, thus guaranteeing the performances of the crystallite glass.

The invention discloses a full-automatic vision printer. The full-automatic vision printer comprises a rack, an XYtheta correction work platform connected to the rack, a transportation track, a CCD image system, a steel net bracket, a steel net, a scraper and a lifting platform which is connected to the upper side of the XYtheta correction work platform in a relative up-down movement manner. The transportation track comprises a front branch track and a rear branch track which can relatively get close to each other or get away from each other. Each branch track comprises a support, a conveyingbelt arranged on the inner side of the support, and a clamping plate which is fixedly connected to the support and arranged on the outer side above the conveying belt. The steel net bracket is connected to the rack in a relative up-down movement manner. The distance between the two branch tracks can be adjusted according to the width of a PCB. The lifting platform can ascend to jack the PCB till the upper end face of the PCB is flush with the upper end face of the clamping plates, and then the two clamping plates clamp the front end and the rear end of the PCB correspondingly. The steel net bracket moves downwards, the steel net completely coincides with the PCB, then, the scraper conducts the solder paste printing action, and after solder paste printing is finished, the steel net bracketdrives the steel net to move upwards.

The invention discloses a high-efficiency material used for industrial waste water treatment. The high-efficiency material is prepared by, by weight, 4-10 parts of anionic polyacrylamide, 5-9 parts of sodium lignin sulfonate, 0.5-0.8 part of potassium bacterium powder, 12-18 parts of begasse, 4-5 parts of diatomite, 5-7 parts of Taiwan cypress, 8-12 parts of polymeric ferric sulfate, 4-8 parts of zeolite, 12-18 parts of sodium humate, 14-22 parts of compund bacillus suckling pig, 1.5-2.5 parts of sterilizing agent, 4-7 parts of epoxy propane, 5-8 parts of ethyl cellulose and 1-4 parts of barium carbonate. The high-efficiency material has the advantages of being capable of efficiently and quickly kill bacteria in waste water, effectively precipitating harmful substance and effectively realizing harmless treatment of waste water.