46results about How to "Improve Primary Utilization" patented technology

The invention discloses a casting method for a polycrystalline silicon ingot. The casting method comprises a crucible pretreatment process and an ingot casting process, wherein the crucible pretreatment process comprises the steps of preparing silicon nitride slurry from silicon nitride powder, silica sol and water, spraying the silicon nitride slurry at the side wall and bottom of a crucible, and spraying other silicon nitride slurry at the bottom of the crucible; and soaking silicon powder in an acid solution with strong oxidizing property for 30-60 minutes, then, separating, washing to be neutral, drying the washed silicon powder, next, preparing slurry from the dried silicon powder, the silica sol and the water, spraying the slurry at the bottom of the obtained crucible, and sintering the treated crucible; and the melting stage of the ingot casting process comprises the step of immediately opening a cage to cool when a silicon material floats from the bottom of the crucible. The polycrystalline silicon ingot produced by using the casting method disclosed by the invention has the characteristics of short production period, low cost, long silicon ingot minority carrier lifetime, high primary silicon material utilization ratio and the like, and the obtained polycrystalline silicon wafer has the characteristics of uniform grain size, small defect density, high photoelectric conversion efficiency and the like.

The invention discloses a preparation method of a black-edge-free high-efficiency polycrystalline silicon ingot, which comprises the following steps: applying a high-purity quartz sand slurry on the inner side surface of an increased quartz crucible for polycrystalline cast ingots to form a high-purity coating; applying a high-purity fine sand slurry to form a fine sand coating, and carrying out high-temperature quick sintering for 1 hour; spraying a silicon nitride slurry on four walls in the crucible with the two high-purity coatings to form a high-purity silicon nitride coating as a mold release agent; laying a fine silicon material layer on the bottom of the crucible with the silicon nitride coating as a seed crystal layer, and putting a primary silicon material on the seed crystal layer; and opening the heat insulation cage to the height of 5-6cm in the melting stage, testing the residual height of the silicon material with a quartz rod, quickly cooling when the residual height is 5-6mm, entering the crystal growth stage, and controlling the temperature gradient in the crucible to form vertical temperature gradient in the crucible from bottom to top so as to induce the growth of the molten silicon material by utilizing the seed crystal layer laid on the bottom, thereby obtaining the black-edge-free high-efficiency polycrystalline silicon ingot.

The invention belongs to a method for treating wastewater of a rubber vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfonamide (CZ). The method comprises: returning 30%-40% of generated wastewater into a CZ synthesis reaction vessel for indiscriminate application, subjecting the rest part to vacuum distillation, recovering cyclohexylamine; precipitating organic components dissolved in cyclohexylamine, filtering the recovered mother liquid, and putting the precipitated organic matter into the synthesis reaction vessel for continuous reaction, and leading the filtrate to multiple-effect evaporation so as to obtain a sodium chloride saturated solution, conducting concentration so as to obtain a supersaturated solution of sodium chloride, and carrying out centrifugation, thus obtaining sodium chloride; returning part of the evaporated water to the device for reuse, and leaving the left part to biochemical treatment. In order to make the raw material M completely reacted during production, excess cyclohexylamine is added, so that a great amount of cyclohexylamine is contained in the wastewater. By adopting a mother liquid indiscriminate application technology, the mother liquid can be recycled, the primary utilization rate of cyclohexylamine can be enhanced, simultaneously the mother liquid treatment cost can be reduced, and the CZ yield can be improved. After mother liquid indiscriminate application, the CZ product has no abnormal change in appearance, and no obvious change in melting point as well as ash content.

The invention provides a thiofide NS wastewater treatment process as follows: process water, a raw material M, a surfactant are blended and stirred according to proportion, then tert-butylamine is added into a synthesis reaction kettle for fully beating; after warming and activating, an NS slurry is obtained by dropping sodium hypochlorite solution to carry out oxidation synthesis reaction at a certain temperature, a part of filtered NS mother liquor is returned to the NS synthesis reaction kettle to apply, a part of filtered NS mother liquor is vacuum-distilled to recover tert-butylamine, organic components such as NS dissolved in tert-butylamine are separated out, the recycled mother liquid is filtered, the separated organic substances are put into the synthesis reaction kettle to continue reaction, the filter liquor is led to carry out multiple effect evaporation, sodium chloride saturated solution is obtained, and a part of the evaporable water is returned to the device to recycle, while the other part thereof is carried out biochemical treatment.

The invention discloses a solar energy air source absorption heat pump device. The solar energy air source absorption heat pump device is characterized in that natural energy source solar energy is taken as the driving energy of the unit, and the solar energy is input by a heating exchanger in a generator to the solar heat pump device to provide power for unit operation; energy in the air is absorbed through an air source heat exchanger coil; and the two parts of energy are released through condensation of refrigerant vapor and fusion heat of the refrigerant vapor and dilute solution, and transferred to hot water, thus the energy utilization rate is improved.

The invention relates to a high-temperature tunnel kiln type flattening method for bamboo tubes. The method comprises the following process steps of: (1) pre-treating fresh bamboo tubes; (2) stacking the bamboo tubes; (3) flattening the round bamboo tubes in a tunnel kiln; and (4) performing post-treatment on the flattened bamboo chips. The method provided by the invention has the advantages that in a high-temperature divided tunnel kiln at the temperature of 130-160 DEG C, the temperature of the bamboo tubes reaches the softening points of lignin, cellulose and hemicellulose by means of quick heating and heat-moisture treatment of high-temperature superheated steam on fresh round bamboo tubes. Under such a circumstance, under the pressure of a top-mounted oil cylinder in a bamboo tube flattening room, the round bamboo tubes with saw joints are flattened, so that the bamboo flattening treatment temperature as well as the labor intensity and severe environment during operation of workers is reduced. The manufactured flattened bamboos are more excellent in physical and mechanical properties and the like, are attractive in color and luster and are suitable for manufacture of artware and furniture and home decoration. The method provides a more excellent processing method for bamboo industry.

The invention relates to an efficient production method of small-diameter-log composite wood. The efficient production method comprises the following technological steps of (a) small-diameter-log pretreatment, (b) saturated vapor heating and softening, (c) gluing and hot press molding, and (d) continuous plate blank heating curing and drying. The efficient production method has the beneficial effects that gluing is carried out on small diameter log obtained after high temperature saturated treatment while it is hot, then same-direction paving compression is carried out, the small diameter log can be heated and is easily extruded to be in a similar hexagon shape, gaps between the small diameter log will be filled, the small diameter log makes contact with each other and is glued into a whole, the small diameter log is manufactured into the composite wood with different cross sections according to needs, and the composite wood is fixed into a mold to be cured and dried through a high temperature tunnel kiln. According to the composite wood produced through the process, the small diameter log using rate is high, the production efficiency is high, quality is good, and material sources are sustainable.

A hydrothermal synthesis of gadolinium-diethylentriaminepentaacetic acid is carried out by using gadolinium oxide and diethylentriaminepentaacetic acid, hydrothermal synthesizing, and obtaining gadolinium- diethylentriaminepentaacetic. It is an inorganic complex chemical synthetic technology. Its advantages include less impurities, high reacting speed and output efficiency.

The invention discloses an automatic assembly method of recombined bamboo. The automatic assembly method comprises the following process steps that (a) bamboo skin/bunch gumming and drying are carried out; (b) weighing is carried out; (c) bamboo bunches are automatically lifted and placed into parallel cells on a base plate; and (d) the bamboo bunches in the parallel cells slide down to the base plate. The automatic assembly method has the beneficial effects that through the bamboo recombined bamboo, the one-time utilization rate of moso bamboo and other large-diameter bamboo can be increased to 80% or above from 20%-50%, and the utilization rate of small-diameter bamboo, sympodial bamboo and other bamboo which cannot be industrially utilized reaches up to 80% or above. The bamboo recombined bamboo is produced through pavement via the method, high-quality scrimber can be obtained and used as materials for floors or furniture or buildings, and in addition, the labor intensity of staff is relieved. Production of the recombined bamboo of automatic pavement is possible, and guarantees are provided for healthy development of the recombined bamboo.

The invention discloses a preparation process of ultralow-viscosity dimethyl silicone oil. Low-molecule separation of dimethyl silicone oil is performed in a rectification manner, high-boiling-point components can be reserved to the greatest extent and low-boiling-point components can be separated to the greatest extent under the set rectification conditions, the content of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and other molecules in the ultralow-viscosity dimethyl silicone oil with the higher boiling point can be further better controlled, application requirements in certain special high-end application fields such as the personal care industry can be met, besides, ultralow-viscosity linear dimethyl silicone oil with the lower boiling pointer can be captured from rectification fractions, and the one-time yield of a reaction is increased.

The invention provides a preparation method of styrene butadiene rubber. The preparation method comprises the following steps: performing emulsion polymerization of styrene and butadiene, wherein whenthe conversion rate of total monomers for emulsion polymerization reaches 58-62%, a sylvite aqueous solution is added into the reaction system of emulsion polymerization, and reacting is further conducted to obtain styrene butadiene rubber. In the method, viscosity of a polymerization system with a high conversion rate can be controlled to a viscosity level with low conversion rate, then the viscosity of the system is kept at a relatively low state, and the problems of performance degradation of the styrene butadiene rubber and decrease of latex heat transfer and stability caused by excessively high viscosity are relieved. Thus, the conversion rate of emulsion polymerization can be improved while the product performance and operation stability are maintained. The one-time utilization rateof the monomers is increased, the recycling energy consumption is reduced, and the production capacity of the polymerization equipment can be enhanced; and therefore, the method has great significance.

The invention relates to a parallel small diameter heat pipe enhanced heat exchange device for recovering medium and low temperature flue gas waste heat, aims to solve the problem of waste of medium and low temperature flue gas waste heat generated in small combustion equipment primarily, recovers the flue gas waste heat by means of parallel small diameter heat pipes to produce hot water or heat other substances, and is suitable for recovering waste heat of small flow flue gas or a discontinuous small flow heat source. The parallel small diameter heat pipe enhanced heat exchange device is primarily characterized in that the parallel small diameter heat pipe enhanced heat exchange device is good in heat transfer property, compact in structure, small in size, easy to process and low in cost,and can achieve self transfer of heat and efficient recovery of waste heat, so that the exhaust gas temperature is reduced greatly and the integral efficiency of the system is improved. The device isquite suitable for heat recovery of small capacity medium and low temperature flue gas waste heat and discontinuous waste heat resources, and a heating container is taken conveniently.

The invention discloses a continuous production system and production method for bamboo flattened plates. The continuous production system is characterized by being electrically connected with a control system and comprising a bamboo softening device for carrying out high-temperature and high-humidity softening treatment on bamboo chips, a bamboo pretreatment device, a planing and flattening all-in-one machine and a bamboo post-processing device, wherein the bamboo pretreatment device and the planing and flattening all-in-one machine are arranged at the feeding end and the discharging end of the bamboo softening device respectively, and the bamboo post-processing device is arranged at the discharging end of the planing and flattening all-in-one machine; and an automatic delivery device andan automatic conveying mechanism which are used for continuously and automatically conveying bamboo chips are arranged between the planing and flattening all-in-one machine and the bamboo softening device and between the planing and flattening all-in-one machine and the bamboo post-processing device respectively, and an automatic feeding device used for continuously and automatically feeding thebamboo chips is further arranged between the bamboo pre-processing device and the bamboo softening device. According to the continuous production system, intelligent control is achieved through the control system, the bamboo softening and flattening effect is good, the bamboo utilization rate is high, the yield of the bamboo flattened plates is remarkably increased, the manufacturing cost is low,continuous and efficient production of large-batch bamboo flattened plates can be achieved, the practicability is good, and the wide industrial application prospect is achieved.

The invention discloses a smelting method of a corrosion-resistant soft magnetic alloy material, and can solve the problems of low yield and low production efficiency of the produced corrosion-resistant soft magnetic alloy material and the like and also can improve the comprehensive performance of the material. The invention adopts the main scheme that a cast ingot for smelting an intermediate-frequency furnace or a vacuum induction furnace or other equipment is subjected to electroslag re-melting to obtain a high-quality heat processing blank. A formula for slag subjected to electroslag re-melting is calcium fluoride: calcium oxide: aluminum oxide=(65-80):(1-5):(15-25); and the filling ratio of 0.5-0.6 is adopted during re-melting. The smelting method has the following advantages that: the segregation is reduced, the organization is fined, the contents of P and S elements are reduced, the contents of inclusions are reduced, and the distribution of the inclusions is improved, so that the forming performance (the yield is improved by about 5-10 percent) and the use performance of materials are improved; and the produced blank has good surface quality and needs not to be peeled off, so that the material one-time utilization ratio (about 5-10 percent) and the production efficiency (about 5-10 percent) can be improved.

The invention relates to a rotating cathode mechanism which comprises a target rotating mechanism (4), a target bracket (3), a cooling water pipe (8), a pole boot (7), a plurality bar-shaped magnets (6) and a target material (5), wherein the pole boot (7), the plurality bar-shaped magnets (6) and the target material (5) are mounted outside the cooling water pipe (8) in sequence; an end cover (9) is mounted on one side of a sleeve; the target rotating mechanism (4) and the target bracket (3) are mounted at the other end of the sleeve; and a stainless steel tube is sleeved between the bar-shaped magnets (6) and the target material (5). The rotating cathode mechanism is a novel mechanism; the target material is rotated during a sputtering process, so that the consumption of the target material in the whole area is utilized to uniformly etch and the once use ratio of the target material is increased to above 80%; and the arcing and target surface residues are efficiently reduced and the stability of the technology is excellent.

The invention discloses a method for preparing p-benzoquinone by electrocatalytic oxidation of phenylamine. The method comprises the following steps of: preparing soft manganese mineral powder and dilute sulphuric acid into a solution; dipping phenylamine into the solution; oxidizing phenylamine by manganese dioxide contained in soft manganese mineral powder; and after oxidization reaction is finished, distilling the solution, crystallizing, dewatering and drying to obtain the product p-benzoquinone. By the method, electrocatalysis, reinforcement and oxidization are added during oxidization of phenylamine; the oxidization effect of the original manganese dioxide in the soft manganese mineral powder is improved, and the Mn<2+> which does not basically act is converted into Mn<3+> and Mn<4+> during oxidization so as to reinforce the oxidization process, so that the primary utilization rate of the soft manganese mineral powder is improved, and the primary yield rate of p-benzoquinone is naturally improved.

The invention discloses a compound fertilizer generation system, and solves the problems of uneven particle, high moisture content, more returning charge and the like in the production and granulationprocesses of the existing compound fertilizer. In the technical scheme, the compound fertilizer generation system comprises a pretreatment system, a granulation system, a posttreatment system and a charge and returning charge system which are sequentially connected, the granulation system comprises a roller provided with a drive device, a discharge structure is connected to the rear end of the roller, a charge tube, an acid mixing tube, a tubular reactor and an ammonia spraying tube bundle are sequentially arranged at the front section of the roller from top to bottom, the acid mixing tube, the tubular reactor and the ammonia spraying tube bundle are respectively provided with a sprayer; the charge tube is connected with the charge and returning charge system, the tubular reactor is connected with an ammonia station, the pretreatment system and a sulfuric acid storage tank respectively; the acid mixing tube is connected with a tail gas treatment system and the sulfuric acid storage tank respectively; and the ammonia spraying tube bundle is connected with the ammonia station. The system is simple, saves energy and reduces consumption, the product strength is high, the returning rate is low, the production efficiency is high, the water solubility is good, and the compound fertilizer generation system is environmentally friendly.

The invention relates to a heating-pure hydrogen reduction cooling system and method, belongs to the technical field of shaft furnace reduction in the metallurgical process, and solves the problem of low hydrogen utilization rate in the prior art. The heating-pure hydrogen reduction cooling system comprises a heating section, an isobaric section and a reduction cooling section which are sequentially communicated from top to bottom; the heating section is provided with an oxidized pellet inlet, a hot flue gas inlet and a flue gas outlet, oxidized pellets from the oxidized pellet inlet are in contact with hot flue gas from the hot flue gas inlet in the heating section, the flue gas after contact is discharged from the flue gas outlet, and the oxidized pellets after contact enter the isobaric section; the reduction cooling section is provided with a hydrogen inlet and a gas outlet, oxidized pellets from the isobaric section and hydrogen from the hydrogen inlet are reduced and cooled in the reduction cooling section, and gas generated in the reduction and cooling process is discharged from the gas outlet. The hydrogen utilization rate is improved.