26results about How to "Improve the crystallization process" patented technology

The utility model relates to the technical field of arsenic oxide crystallization, in particular to an arsenic oxide cooling crystallization liquid inlet device, which comprises a crystallization kettle, a guide plate, a diversion barrel and a circulating pump, a mounting hole is formed in the middle of the guide plate, a hollow sleeve is fixedly connected in the mounting hole, and the top of the hollow sleeve is fixedly connected with an upper cover of the crystallization kettle. The flow guide plate plays a role in dispersing water flow, the flow dividing barrel is fixedly connected to an upper cover of the crystallization kettle, and an inner cavity of the flow dividing barrel is fixedly communicated with flow dividing pipelines arranged in a circumferential array. Through the cooperative design of a flow guide plate, a flow dividing barrel, a flow dividing pipeline and a circulating pump, an arsenic solution in a crystallization kettle can be pumped by the circulating pump and conveyed into the flow dividing barrel, the arsenic solution flows out in a water flow column state through the flow dividing barrel, and under interception of the flow guide plate, the water flow column is scattered into a water curtain; and the water curtain is sprayed on the inner wall of the crystallization kettle and flows down from the inner wall for rapid cooling, so that the cold and heat transfer effect is good and the crystallization process of the arsenic solution is accelerated through a circulating cooling mode.

The utility model discloses a crystallization stirring tank for sodium thiosulfate, and relates to the technical field of sodium thiosulfate production. Comprising a supporting frame, a charging barrel is fixedly connected to the supporting frame, a detachable cover is connected to the top end of the charging barrel, a fixing frame is fixedly connected to the cover, a motor is fixedly connected to the fixing frame, a rotating rod is fixedly connected to an output shaft of the motor, and a stirring rod is fixedly connected to the rotating rod. The connecting sleeves distributed at equal intervals are fixedly connected to the stirring rod, and stirring blades are rotationally connected to the connecting sleeves. The stirring rod and the stirring blades rotate to stir a solution, the stirring efficiency is improved, under the action of the clamping block and the spring, the stirring blades can rotate to adjust the angle, and the contact area with the solution is adjusted according to the stirring requirement, so that stirring is more uniform, the problems of crystal scaling and uneven particle distribution are reduced, and the crystal quality is improved.

The invention discloses a pulse electrochemical crystallization coupled composite constructed wetland system which comprises an energy system, a pulse electrochemical crystallization pond and a composite constructed wetland system, and the energy system supplies energy to the pulse electrochemical crystallization pond and the composite constructed wetland system. Aquaculture wastewater firstly enters a pulse electrochemical crystallization pond, struvite (MAP) sediment is formed through electrochemical crystallization, ammonia nitrogen and phosphate in the wastewater are efficiently removed, and partial removal of organic matter is achieved. Then the wastewater enters a composite artificial wetland system, and the wastewater is deeply purified under the action of filler filtration / adsorption, microbial assimilation / conversion and plant absorption. The pulse electrochemical crystallization coupled composite constructed wetland system is compact in structure, and the defects of high energy consumption of direct-current electrochemical crystallization and low purification efficiency of a traditional constructed wetland are overcome through physical-chemical-biological multi-path coupling enhanced culture wastewater treatment.

The invention provides an oxygen-vacancy-rich Bi5O7I microsphere piezoelectric-photocatalyst and a preparation method thereof, and belongs to the technical field of light pressure concerted catalysis, and the preparation method comprises the following steps: mixing Bi (NO3) 35H2O and PEG 6000 powder, dissolving in absolute ethyl alcohol, uniformly stirring, dropwise adding a NaI solution, uniformly stirring again, sequentially washing and drying to obtain a dried product, and calcining the dried product to obtain the oxygen-vacancy-rich Bi5O7I microsphere piezoelectric-photocatalyst. The Bi5O7I microsphere piezoelectric-photocatalyst rich in oxygen vacancy is obtained; according to the invention, richer oxygen vacancies are introduced into the Bi5O7I powder, the spectral absorption range of the piezoelectric-photocatalyst is expanded, and the concentration of current carriers is improved by utilizing the capturing effect of the oxygen vacancies on electrons, so that the photocatalytic, piezoelectric catalytic and light-pressure synergistic catalytic efficiency of the piezoelectric-photocatalyst is improved; the oxygen-vacancy-enriched Bi5O7I microsphere piezoelectric-photocatalyst prepared by the preparation method disclosed by the invention has efficient organic dye degradation performance, and the catalytic effect of the oxygen-vacancy-enriched Bi5O7I microsphere piezoelectric-photocatalyst is far superior to that of pure-phase Bi5O7I powder.

The invention provides an auxiliary cooling device for friction welding of a ring pipe structure and a working method of the auxiliary cooling device, and belongs to the technical field of friction welding. The problems that in the prior art, due to the fact that the surface of an inner ring of a large-diameter-thickness-ratio ring material dissipates heat slowly, the cooling speed of a welding area is uneven, residual stress is increased, the strength of a welding joint is affected, and due to the fact that the surface of the inner ring dissipates heat slowly, microstructure changes are uneven, and the mechanical property of the material is affected are solved. The device comprises a tailstock side clamp, a main shaft side clamp, an inert gas connecting pipe, a gas nozzle and a cooling medium spraying mechanism, the tailstock side clamp is installed in a movable sliding table box body of friction welding equipment, a tailstock side part to be welded is clamped in the tailstock side clamp, a main shaft side part to be welded is clamped in the main shaft side clamp, and the inert gas connecting pipe is connected with the gas nozzle. An inert gas connecting pipe is arranged in the main shaft side to-be-welded part, the outlet end of the inert gas connecting pipe is connected with the gas nozzle, and a cooling medium spraying mechanism is arranged on the inner side of the tailstock side to-be-welded part. The device is mainly used for cooling the welding seam of friction welding.

The invention relates to the technical field of environmental engineering, in particular to a fluorine ion crystallization recovery method based on a PCR (polymerase chain reaction) pellet reactor, which comprises the following steps: (1) measuring and recording the concentration of fluorine ions in wastewater to be treated, and adding a calcium salt agent and a special seed crystal according to the concentration of the fluorine ions in the wastewater to be treated; (2) adding a calcium salt agent and a special seed crystal, uniformly stirring and mixing, and adjusting the pH value of the wastewater to 6.0-7.5; (3) controlling the reaction time to be 10-30 minutes; (4) recycling fluorine-containing pellet crystals after the wastewater treatment is completed; the invention provides a fluorine ion crystallization recovery method based on a PCR (polymerase chain reaction) pellet reactor, which comprises the following steps: adding a calcium-containing composite chemical agent and a seed crystal into fluorine-containing wastewater to induce fluorine element crystallization to form microcrystals, and crystallizing layer by layer to form a fluorite-like layer as time goes on so as to realize recovery and reutilization of fluorine resources.

The invention provides a core replacing type molten aluminum crystallization launder and a using method thereof, and relates to the technical field of non-ferrous metal metallurgical equipment.The core replacing type molten aluminum crystallization launder comprises a launder body and an inner core assembly, a liquid flowing groove is formed in the top of the launder body, and a containing groove is formed in the bottom of the launder body; the inner core assembly is arranged in the containing groove, the inner core assembly and the containing groove are detachably installed, the inner core assembly comprises a crystallizer inner core and a heating plate inner core, and the crystallizer inner core and the heating plate inner core are alternately connected with the containing groove; according to the core replacement type molten aluminum crystallization launder, the working mode of the launder is adjusted by replacing different inner cores, different actual requirements are met, meanwhile, the launder body is easier to maintain and upgrade, it is effectively guaranteed that all areas in the launder are dried evenly and thoroughly, and it is guaranteed that the subsequent cooling crystallization process is conducted smoothly.

The invention relates to a self-induced crystallization phase change storage unit and a preparation method thereof, the self-induced crystallization phase change storage unit comprises a phase change storage medium layer, the phase change storage medium layer is a multi-layer structure formed by phase change material layers and self-induced crystallization InyTe100-y material layers which are vertically stacked, periodically and alternately grown, and y is more than or equal to 20 and less than or equal to 80. The self-induced crystallization phase change memory cell has the characteristics of rapid data writing capability and long service life, can realize high-low resistance difference of more than three orders of magnitude, effectively improves the multi-resistance state memory stability, and can solve the problems of high power consumption, short service life, slow phase change speed and the like of a phase change memory in the prior art.

The invention provides a sulfamic acid preparation device, and particularly relates to the technical field of sulfamic acid preparation, in particular to a reaction device for generating sulfamic acid, the reaction device is connected with a pre-cooling structure, the pre-cooling structure is connected with a refrigerator body, and the refrigerator body is connected to the outer side of a buffer cylinder in an up-down sliding mode. A filter plate is arranged on the inner side of the refrigerator body in an up-down sliding manner; a piston plate is arranged on the inner side of the buffer cylinder in an up-down sliding manner; the piston plate is connected with a discharging structure used for discharging sulfamic acid, the discharging structure penetrates through the filter plate and is connected with a heat exchange structure, and the heat exchange structure is connected to the conveying filter assembly and further connected with a pre-cooling structure; and a discharging structure is arranged at the bottom end of the temporary storage barrel. The sulfamic acid preparation device provided by the invention can improve the crystallization efficiency of sulfamic acid, increase the filtration and separation efficiency of crude sulfamic acid, improve the cooling efficiency of a sulfamic acid crude product solution, reduce the energy consumption of a refrigerator and realize sufficient solid-liquid separation of sulfamic acid.

The invention relates to the technical field of cable preparation, in particular to a breakage-resistant photoelectric composite cable for wiring in a narrow space. Comprising a composite crosslinked polyethylene cable protection layer and an optical cable, and the composite crosslinked polyethylene cable protection layer comprises the following components in percentage by mass: 16-18% of precursor powder, 5-6% of a charring agent, 74.6-78% of PE, 0.6-0.8% of triallyl cyanate and 0.4-0.6% of dicumyl peroxide. The cerium nitrate, the yttrium nitrate and the sodium stannate are compounded to prepare the spherical rare earth nano material, and yttrium ions of the yttrium nitrate and the sodium stannate can finally form a crystal material with an approximately spherical polyhedral structure, so that the mechanical property of the composite crosslinked polyethylene cable protection layer is improved; according to the present invention, the composite material is not easily layered and cracked under the long-time pressure bearing condition, the microstructure of the composite material is changed so as to achieve the more compact structure, and the pressure resistance is improved to a certain extent.

The invention relates to the technical field of perovskite photovoltaic cells, in particular to a method for preparing a perovskite layer through a two-step coating method, the perovskite layer and a photovoltaic module. The method for preparing the perovskite layer by the two-step coating method comprises the following steps: S1, providing an aerogel template; s2, preparing a precursor solution; s3, preparing an aerogel-precursor solution; s4, preparing a precursor film; s5, carrying out first annealing treatment to prepare a lead iodide film; and S6, preparing the perovskite layer. According to the method for preparing the perovskite layer through the two-step coating method, the perovskite layer and the photovoltaic module, the problems of poor crystallinity and uniformity of the perovskite layer prepared through the two-step method in the related technology are solved.

The invention discloses a preparation method of a perovskite single crystal film, and relates to the technical field of perovskite. The invention relates to a preparation method of a perovskite single crystal thin film, which comprises the following steps of: (1) spin-coating an ITO (Indium Tin Oxide) substrate with an Meo-2PACz molecular solution dissolved in an organic solvent 1, and annealing at 95-100 DEG C for 10-12 minutes to obtain a multi-layer Meo-2PACz small molecular thin film; and (2) spin-coating a PTAA solution dissolved in an organic solvent 2 on the multi-layer Meo-2PACz micromolecular film, and annealing at 95-100 DEG C for 10-12 minutes. According to the preparation method, the growth substrate of the single crystal is modified, and the prepared ITO / SAM / PTAA-SAM substrate has the advantages of optimizing the energy level, passivating interface defects, promoting carrier transport, providing perovskite nucleation sites and the like.

An object is to provide at least one of a multilayer film structure having high crystallinity and high flatness and a method for producing the multilayer film structure and is further to provide at least one of a multilayer film structure that includes a SiC substrate and a nitride-based film formed on the substrate by a sputtering process and that can be applied to power devices and a method for producing the multilayer film structure. A multilayer film structure includes a SiC substrate and a film disposed on the SiC substrate and containing a nitride-based material at least containing Ga, wherein the multilayer film structure has an off-angle of 0.03° or more and 8° or less with respect to a Silicon face of a (0001) plane of a SiC single crystal forming the SiC substrate and the film containing the nitride-based material has a C content of 2 × 1019 atoms / cm3 or less and a Cl content of 2 × 1018 atoms / cm3 or less.

The extraction device comprises a stone crusher, a reaction extraction pool, a vacuum evaporator and a waste liquid pool, the outlet end of the stone crusher is communicated with the inlet end of the closed reaction extraction pool through a conveying belt, and an injection opening is formed in the top of the reaction extraction pool; a plurality of rows of ultrasonic probes arranged in the generatrix direction of the inner wall are arranged in the circumferential direction of the inner wall of the reaction extraction pool at intervals, at least two ultrasonic probes are further arranged at the bottom of the reaction extraction pool at intervals, and the outlet end of the reaction extraction pool is communicated with the inlet end of the waste liquid pool through a blow-off pipeline; the other outlet end of the reaction extraction pool is communicated with the inlet end of a vacuum evaporator through a first conveying pipeline, and the vacuum evaporator is provided with a plurality of outlet ends which are correspondingly communicated with the inlet ends of a first condensation pipe, a second condensation pipe and a third liquid storage tank through a second conveying pipeline, a third conveying pipeline and a fourth conveying pipeline respectively; and the outlet ends of the first condenser pipe and the second condenser pipe are correspondingly communicated with the inlet ends of the first liquid storage tank and the second liquid storage tank through pipelines respectively.

The invention discloses carboxylated ferroferric oxide magnetic nano microspheres and a preparation method thereof, and belongs to the technical field of magnetic nano microsphere preparation.The preparation method comprises the following steps that cellulose and ferroferric oxide magnetic nano microspheres are prepared into composite magnetic nano microspheres through a gel method; the preparation method comprises the following steps: preparing ferroferric oxide magnetic nano-microspheres with strong magnetism and high stability, coating the surfaces of the ferroferric oxide magnetic nano-microspheres with a layer of cellulose gel layer containing hydroxyl groups, and carrying out combined action on hydroxyl and carboxyl introduced by amide reaction to obtain the carboxylated ferroferric oxide magnetic nano-microspheres. The dispersity and the stability of the carboxylated ferroferric oxide magnetic nano-microspheres during sewage treatment are improved, and the removal rate of heavy metals in sewage is increased.

The present application relates to sewage treatment technical field, the present application provides a kind of harmless treatment device of sewage for fiber production, for processing liquid in fiber filament washing tank, including crystallizing tank setting in washing tank side, crystallizing tank is communicated with washing tank, to enable the liquid in washing tank can enter crystallizing tank, crystallizing tank has PH regulator adding port;Refrigerant liquid inlet pipe is set in crystallizing tank, one end of refrigerant liquid inlet pipe is located outside crystallizing tank, the other end is located in crystallizing tank;Refrigerant liquid outlet pipe sleeve is set on refrigerant liquid inlet pipe, and the inner wall of refrigerant liquid outlet pipe and the outer wall of refrigerant liquid inlet pipe have liquid outlet gap, one end of refrigerant liquid outlet pipe is located outside crystallizing tank, and refrigerant liquid outlet pipe is configured, one end of refrigerant liquid outlet pipe located in crystallizing tank and one end of refrigerant liquid inlet pipe located in crystallizing tank are interconnected.By the above technical scheme, the technical problem that the liquid in the tank body is slowly cooled by the heat exchange medium in the tank body interlayer in the prior art is solved.

The invention belongs to the technical field of monofilament spinning, and particularly relates to a monofilament and a preparation method thereof. The monofilament is prepared from the following raw materials in percentage by weight: 93.00 wt% to 98.90 wt% of polyphenyl ether sulfur resin, 0.50 wt% to 5.00 wt% of polyester, 0.30 wt% to 1.00 wt% of a nucleating agent and 0.30 wt% to 1.00 wt% of a crystallization accelerant. According to the monofilament provided by the invention, the polyphenylene ether sulfur resin is adopted as a main raw material, the nucleating agent and the crystallization accelerant are added for blending granulation to form a PPS modified polymer, micro-crosslinking is formed through a double-screw hot shearing effect, the melt strength is improved, and the flow stability is improved for single-screw spinning in the next step; meanwhile, the polyester blend is added, so that the fluidity during spinning is remarkably improved, the stability and efficiency of the production process are improved, the adhesion between PPS and a mold is reduced, and the abrasion of equipment is reduced.

This invention relates to a CVD-modified coating, its preparation method, and its application, belonging to the field of coating technology. The preparation method includes the following steps: obtaining a CVD coating using chemical vapor deposition; subjecting the CVD coating to freeze-drying to obtain a first CVD coating; subjecting the first CVD coating to magnetic field heat treatment to obtain a second CVD coating; and sequentially alternatingly processing the second CVD coating with the freeze-drying and magnetic field heat treatments to obtain the CVD-modified coating. Based on existing CVD coating preparation methods, this invention utilizes a combined magnetic field heat treatment and freeze-drying process for synergistic modification, optimizing the microstructure of the CVD coating. When applied to a substrate surface, it can improve its hardness and wear resistance, thereby extending the service life of devices such as cutting tools, molds, and machine parts, and has a wide range of applications.

The present application embodiment proposes a shotcrete material, preparation method and application based on perovskite stress luminescence, wherein a poor solvent is added to a good solvent of a perovskite precursor, and the pH of the mixed solution is adjusted after ultrasonic treatment, and the mixed solution is stirred, filtered and dried to prepare perovskite nanocrystals with stress luminescence effect; wherein the addition ratio of the good solvent to the poor solvent is 3:1; by mass, 15-25 parts of perovskite nanocrystals, 5-15 parts of nano-enhanced particles, 3-8 parts of nano-toughened fibers and 3.5 parts of additives are added to 100 parts of gelling material, and the dry powder is stirred to obtain the shotcrete material. The shotcrete material in this application can warn of deformation of coal mine lanes, emit light under the action of deformation stress of coal mine lanes, and collect the intensity and distribution of light signals emitted by lane stress in real time and dynamically through a visual camera during the application process, and reflect the ground stress and deformation of the coal mine lanes in real time and dynamically.

The invention discloses a material, forming equipment, a forming process technology, a design scheme and an auxiliary drying equipment technology for manufacturing industrial large-scale parts by using macromolecular resin. A chemical fiber raw material is subjected to water washing, sorting, additive adding and melting, and plastic particles are obtained through granulation and slicing equipment; then the materials pass through the first extrusion equipment and are melted and plasticized, the materials in the molten state enter the second extrusion equipment to be gradually cooled to reach the softening state, the materials are further cooled and extruded to the blank mold and the forming mold, and compression molding solves the problem that large resin components cannot be formed; by optimizing the raw materials and the design structure, the stacking volume of the product is reduced by 30%-50%. Microwave drying equipment is used, molecular chains of hydrates are directly broken, and energy is saved by 70%. The strength requirement is met through material optimization and structural design, and the cost is greatly reduced; the stacking size is reduced, and the logistics cost is reduced; the large product forming process technology and the forming equipment technology are achieved; the problem of recycling of chemical fiber waste is solved, the environmental protection benefit and the economic benefit are huge, and the manufactured large clamping plate is low in manufacturing cost, excellent in performance and high in bearing capacity.

The utility model relates to the technical field of chemical fiber equipment, and discloses a movable small drying tower, which comprises a storage barrel fixed on a movable frame. A discharging connecting opening is formed in the bottom of the storage barrel; at least four rollers are arranged at the bottom of the movable frame; a hot air drying device is arranged on the movable frame and comprises a hot air pipe, and the hot air pipe is communicated with the lower cavity of the storage barrel. The problems that in the prior art, when a large drying tower is used for small-batch production, energy consumption is high, and cost is high are solved, and the effects of reducing energy consumption, saving cost and being flexible in operation are achieved.

The utility model relates to the technical field of metallurgy, and particularly discloses a crystallizer casting mold which comprises a base and a casting body, an L-shaped mounting seat is arranged on the base; the mounting seat is fixed at the top of the base; the pouring body is provided with an inner container and a shell; a heat conduction cavity is formed between the inner container and the shell; a heat conduction piece is arranged in the heat conduction cavity; the heat conduction piece is attached to the outer surface of the inner container; the top of the inner container and the top of the shell are arranged in a closed mode. The closed arrangement part is a groove; the mounting seat comprises a first mounting plate and a second mounting plate; the first mounting plate and the second mounting plate are arranged in an L shape after being connected; hinge plates are arranged on the two sides of the first mounting plate correspondingly. The hinge plate and the first mounting plate are integrally arranged; the base is also provided with the dumping mechanism; and automatic pouring of the molten steel meeting the requirements is completed through the heating and pouring mechanism.

According to the inorganic salt crystal slurry thickening system capable of efficiently separating the organic matters, the oil skimming groove is formed in the settling section at the upper part of the thickener, so that the organic matters floating on the surface of a water phase are discharged by utilizing density difference, the organic matters are prevented from being attached to the surfaces of crystals, and the interference of the organic matters on a crystallization process is reduced; and the problem of equipment blockage possibly caused by accumulation of organic matters is also avoided. Meanwhile, a low-speed feeding technology is adopted in the primary pulp distributor, disturbance during feeding is greatly reduced, the completeness of crystals can be maintained, the quality of the final crystals is ensured, in addition, a water phase discharged from the bottom of the oil skimming tank is guided into the thickener again through a special water phase return pipeline, and the water phase is recycled. The circulation process enables contained fine crystal grains to serve as crystal nucleuses to continue to participate in crystallization, the crystallization speed is increased, the crystallization efficiency is greatly improved, and efficient utilization of resources and optimization of the process are achieved.

The invention relates to the technical field of fiber manufacturing, in particular to a special-shaped section polylactic acid hollow filament as well as a preparation method and application thereof. According to the filament, a stereocomplex crystal sc-PLA is constructed by adopting PLLA / PDLA in a near equal proportion, and a multifunctional epoxy chain extender, a polycarbodiimide hydrolysis-resistant agent, a quaternary ammonium salt organized flaky montmorillonite and phosphate / phosphonate metal salt compounded nucleation system and a polyether type reaction grafting hydrophilic agent with a sulfonate ion group and an epoxy reaction group are synergistically introduced. The hydrophilic groups are covalently fixed; and the washable stability is improved. The material meets the conditions that the sc-PLA melting peak is 220-235 DEG C, delta Hmsc is larger than or equal to 12 J / g, the proportion is larger than or equal to 0.55, the grafting rate is larger than or equal to 60%, the ion group retention rate is larger than or equal to 80%, and the contact angle is smaller than or equal to 70 degrees after washing is conducted five times; the wicking height after washing can be increased by more than or equal to 20% when the fabric is used for fabrics, and the fabric has warm keeping and lasting moisture guiding functions.

The invention discloses a preparation method and application of a quasi-two-dimensional pure blue-light perovskite thin film, and the method comprises the following steps: S1, in a solution state, mixing cesium bromide, lead bromide, lead chloride, an organic ligand material, formamidine hydrobromide, lithium bromide and a diethyl pyrophosphamide additive to obtain a perovskite precursor solution; and S2, coating the perovskite precursor solution on a substrate at 50-80 DEG C, and accurately controlling process parameters to realize rapid and uniform crystallization of the thin film and ensure that the high-quality quasi-two-dimensional perovskite thin film is obtained, thereby improving the application performance of the thin film in photoelectric devices such as PeLEDs (Perovskite Light Emitting Diodes) and the like.