1029results about How to "Reduce accumulation" patented technology

The invention discloses a sulfur-manganese composite autotrophic denitrification filler as well as a preparation method and application thereof, and belongs to the technical field of environmental functional materials and polluted water treatment. The sulfur-manganese composite autotrophic denitrification filler contains manganese salt, a sulfur-based component and a cement-based component, the manganese salt comprises one or more of manganese carbonate, calcium manganese ore and rhodochrosite; the sulfur-based component comprises sulfur and sulfur manganese ore; the cement-based component comprises cement, fly ash pottery sand, silica fume, blast furnace slag and metakaolin; the cement comprises one or more of Portland cement, iron aluminate cement and sulphoaluminate cement. The nitrogen removal efficiency of the sulfur-manganese composite autotrophic denitrification filler is superior to that of a sulfur autotrophic denitrification system, the sulfate concentration and nitrite nitrogen accumulation in effluent are remarkably reduced, the service life of the filler is prolonged, and the efficient utilization rate of the material is improved.

The invention relates to the field of transmission shafts, in particular to a transmission shaft support assembly, a transmission shaft assembly and a vehicle. The transmission shaft support assembly comprises a supporting unit and a cushioning unit. The supporting unit comprises a supporting base, a blocking plate and a reinforcing drainage plate. The supporting seat is arc-shaped, and the inner circumferential surface of the supporting seat is an arc-shaped avoiding surface. The blocking plate protrudes out of the arc-shaped receding face. The reinforcing drainage plate is in a concave shape relative to the arc-shaped receding face. And a plurality of through holes are formed in the arc-shaped avoiding surface. The cushioning unit comprises an elastic bushing and a rigid hoop. The rigid hoop is arranged on the outer side of the elastic lining in a sleeving mode. And the rigid hoop is detachably connected with the supporting seat. And a buffer space is formed between the rigid hoop and the arc-shaped avoiding surface. The transmission shaft assembly comprises a transmission shaft support assembly. A vehicle includes a driveshaft assembly. The problem that too much silt is accumulated on the transmission shaft support assembly can be solved.

The invention relates to the technical field of water heating pipeline installation, and discloses an auxiliary support for water heating pipeline installation, which comprises a bottom plate, a first moving assembly is arranged on the bottom plate, an adsorption box is installed on the first moving assembly, a hollow shaft is rotatably connected to the adsorption box, an adsorption opening is formed in the hollow shaft, and the adsorption opening is communicated with the adsorption box. A draught fan is fixed to the lower portion of the adsorption box, a motor assembly for driving the hollow shaft to rotate is arranged in the adsorption box, electric clamping jaws for clamping the water heating pipeline are arranged on the two sides of the adsorption box correspondingly, and a second moving assembly for adjusting the moving positions of the electric clamping jaws is arranged on the bottom plate. A plurality of moving wheels are fixed below the bottom plate; and dust and impurities on the hot melting part of the water heating pipeline can be conveniently cleaned through the rotating brush cleaning block, and can be discharged through the fan, so that dust and impurity residues on the hot melting part of the water heating pipeline are reduced, and the hot melting connection quality of the water heating pipeline is favorably improved.

The invention provides an end-to-end automatic driving system and method. The system comprises an environment sensing module, a feature extraction module, a data fusion module, a decision generation model module and a decision analysis module. The environment sensing module comprises a plurality of types of sensors, and each sensor collects environment information data of different modes. The feature extraction module extracts features of each modal environment information data. And the data fusion module fuses the features of the modal environment information data to obtain fused features. The decision generation model module determines a driving decision by using a trained decision generation model based on the fusion features. And the decision analysis module converts the driving decision output by the decision generation model module into a specific vehicle control instruction. The method has higher adaptability to complex and dynamic driving scenes, reduces the cost of data annotation during training, and improves the generalization ability of the model in various driving scenes.

The invention provides marine-derived lactobacillus rhamnosus S400M01 and application thereof, and relates to the technical field of heavy metal adsorption and removal, the marine-derived lactobacillus rhamnosus S400M01 is preserved in Guangdong Microbial Culture Collection Center (GDMCC) on November 28, 2022, the preservation address is Guangzhou, and the number is GDMCCNO: 63001. The strain can tolerate cadmium chloride concentration up to 1000 mg / L, can tolerate lead concentration up to 800 mg / L, can adsorb and remove heavy metals cadmium and lead in squid viscera, and reduces accumulation of cadmium and lead in viscera of live crucian in a heavy metal polluted water body.

The utility model discloses a squat silo multipoint discharging device, which relates to the technical field of bin discharging and comprises a distributing bin arranged at a feeding port above a squat silo, a central blanking pipe is arranged at the bottom of the distributing bin and communicated with a cavity of the distributing bin, and the distributing bin is provided with a discharging port. A discharging port of the center discharging pipe right faces the middle position in the squat silo, the center discharging pipe is used for laying the bottom of the squat silo, a plurality of side elephants are further arranged on the side wall of the material distribution bin in a downward inclined mode around a shaft and communicated with a cavity of the material distribution bin, the free ends of the side elephants extend towards the side wall of the squat silo, and the center discharging pipe is arranged on the side wall of the material distribution bin. A plurality of blanking openings are formed in the side articulated chutes in the length direction, a first pneumatic valve and a second pneumatic valve are arranged at the positions where the center blanking pipe and the side articulated chutes communicate with the distributing bins correspondingly, and the center blanking pipe and the side articulated chutes are used for blanking in a matched mode, so that materials are evenly stacked; and the problems of serious material grading and unbalance loading of the silo wall existing in the original single blanking point are reduced.

The invention relates to the technical field of freshwater fish culture, and discloses a culture box for freshwater fish culture, which comprises a culture box and a feeding tank, the top of the feeding tank is fixedly connected with a feeding hopper, and a feeding mechanism is arranged in the feeding tank; the feeding mechanism comprises a motor, a vertical shaft, a disc, movable teeth and fixed teeth; the motor is fixedly connected to the outer wall of the top of the feeding tank, the output end of the bottom of the motor penetrates into the feeding tank, animal livers in the smashing chamber are smashed into small blocks through friction and collision of movable teeth and fixed teeth, swallowing of the mandarin fish fries is facilitated, growth and development of the mandarin fish fries are facilitated, a bent pipe is driven by a disc to rotate, and the feeding efficiency is improved. The feeding range is expanded through the rotating bent pipe, and the gear and the rack are arranged to move back and forth in the rotating process of the bent pipe, so that the feeding range of the bent pipe is further expanded, mandarin fish fries are prevented from being grabbed by adult fishes during concentrated feeding, mandarin fish ingestion is more uniform, and the overall mandarin fish growth efficiency is improved.

The invention relates to the technical field of plate cutting, and discloses metal plate cutting equipment which comprises a workbench, two cutting tables are arranged at the top of the workbench, a metal plate is placed above the cutting tables, jacking assemblies are arranged on the two sides of a cutting knife board arranged over the metal plate, and vibration assemblies are arranged in the jacking assemblies. An externally-connected positioning assembly is arranged above the cutting tables, the transverse plate table supports the bottom plate to ascend when ascending, so that one ends of the two cutting tables ascend, the inclination effect is achieved, in the process that the cutting tables incline to enable plates to fall out, cutting disintegrating slag left above the cutting tables can slide out together, and therefore the cutting efficiency is improved. And material collection and disintegrating slag treatment can be carried out in the ascending and resetting process of the cutting knife board, so that the cutting process is smoother, and the efficiency is higher.

The invention relates to the technical field of cables, in particular to a polyethylene insulating material, a preparation method thereof and a high-voltage direct-current cable. The polyethylene insulation material provided by the invention is prepared from the following preparation raw materials: 70 to 100 parts of polyethylene matrix, 0.1 to 30 parts of grafting master batch, 1 to 2 parts of cross-linking agent and oxidation inhibitor, the grafting master batch is prepared from the following raw materials: polyethylene resin, a grafting monomer and an antioxidant, wherein the grafting monomer comprises one or more of compounds with a structure as shown in a formula (I). The polyethylene insulating material provided by the invention has relatively high breakdown strength and relatively low conductivity.

The invention provides an arsenic hyperaccumulation double-gene recombinant vector and application of the arsenic hyperaccumulation double-gene recombinant vector in repairing an arsenic polluted environment, and belongs to the technical field of gene engineering. The arsenic hyperaccumulation double-gene recombinant vector takes a plant expression vector containing a pUbi promoter as a skeleton vector, and further comprises a PvACR3 gene and PvACR3, 1 gene and a prbcS promoter; wherein the pUbi promoter is used for promoting the expression of the PvACR3 gene; a prbcS promoter is used for starting the PvACR3; 1 gene expression. Aiming at the problem of rice death caused by high expression quantity of arsenic accumulation genes in transgenic rice in the prior art, through reasonable design of insertion genes and combination of promoters, toxicity of arsenic accumulation to the transgenic rice is avoided, and the arsenic removal quantity of the transgenic rice is greatly improved.

The invention provides injection molding leftover material smashing equipment, and belongs to the technical field of plastic recycling, the injection molding leftover material smashing equipment comprises a rotating cutter assembly, a cutter groove and a material conveying mechanism, the rotating cutter assembly comprises a rotating shaft, a driving unit, a hobbing cutter and a hooking cutter, and the material conveying mechanism comprises an internal channel and an external pipeline; the internal channel comprises a hobbing cutter cavity, a hooked cutter cavity communicated with the hobbing cutter cavity, a crushing cavity and a containing cavity; the crushing cavity is communicated with the hook knife cavity, an arc-shaped baffle is fixedly installed between the crushing cavity and the containing cavity, an air outlet hole is formed in the baffle, and a crushing knife is arranged in the crushing cavity; the external pipeline comprises a draught fan, an air draft pipeline connected between an air inlet of the draught fan and the containing cavity, and an air conveying pipeline connected with an air outlet of the draught fan and the hob cavity. Under the action of wind power, materials falling into the containing cavity can enter the smashing cavity and are smashed through the smashing cutters, the materials can be blown to move in the axial direction of the rotating shaft, the multiple hobs jointly participate in smashing of the materials, and the material smashing efficiency is improved.

The invention discloses an environment-friendly construction dust suppression device and method, and relates to the technical field of environment-friendly construction. According to the environment-friendly construction dust suppression device, through the design of a composite mechanism, a suction fan is inserted into the outer side of an external connection disc, so that disassembly and assembly are facilitated, follow-up replacement and maintenance are facilitated, the suction fan is started, wind enters from the side, close to a flowing pipe, of the inner wall of a composite shell and flows towards the side of the suction fan, and therefore dust and smell on a site are absorbed; the situation that the site environment is too severe, personnel safety is affected, potential safety hazards are reduced, the flowing pipe is of a structure with the two wide ends and the middle narrow and small, according to the Bernoulli principle, the diameter of the pipeline is reduced, the flowing speed of gas is increased, and therefore the operation effect is improved, and the cleaning efficiency of the construction site is improved; dust and air flow enter the composite shell, harmful gas of the air flow is filtered and purified through the filtering mechanism, and therefore normal operation of equipment is kept.

The water pump comprises a shell assembly, a rotor assembly and a stator assembly, the shell assembly comprises a machine shell, a pump cover and a volute, the pump cover is connected with the front end of the machine shell in a sealed mode, the pump cover is provided with a water pumping cavity, a water inlet pipeline and a water outlet pipeline, the water inlet pipeline and the water outlet pipeline are communicated with the water pumping cavity, and the volute is arranged in the machine shell; the front end of the volute extends to the front end of the machine shell and is connected with the machine shell in a sealed mode, the volute is provided with a rotor cavity communicated with the water pumping cavity, the rear end of the volute is provided with a drainage pipeline extending out of the machine shell, and an annular stator cavity is formed between the machine shell and the volute. The rotor assembly comprises a rotor and an impeller, the rotor is rotatably installed in the rotor cavity, the impeller is fixedly connected to the end of the rotor and located in the water pumping cavity, a cooling channel is formed between the rotor and the volute, and the two ends of the cooling channel communicate with the water pumping cavity and the drainage pipeline correspondingly; the stator assembly is arranged in the stator cavity. According to the embodiment of the invention, the rotor is water-cooled by introducing liquid, and the pressure in the water pump can be balanced.

The invention relates to a wear-resistant high-strength glass protection safety film and a preparation method thereof, and belongs to the technical field of safety films. The silicon carbide whisker, the modified nano titanium dioxide and the graphene oxide are jointly prepared into the composite filler, and the strength and the wear resistance of the film are remarkably improved by utilizing the three-dimensional network structure of the silicon carbide whisker, the efficient filling and reinforcing effects of the nano titanium dioxide and the layered structure reinforcement of the graphene oxide; the permeation of small molecular substances such as moisture and oxygen is effectively blocked, and the barrier property of the membrane is improved. Meanwhile, the silane coupling agent is added, so that the compatibility and dispersity of the composite filler and the water-based resin emulsion are improved. The surface of the membrane is modified by heptadecafluorodecyl trichlorosilane, the hydrophobic performance of the membrane is remarkably enhanced, water vapor condensation and dust and dirt accumulation are reduced, meanwhile, the durability of the membrane is improved, and the wear resistance of the membrane is enhanced through chemical bonding.

The invention relates to a radar interferometer positioning system phase optimization method, which comprises the following steps of: in a satellite research and development stage, performing phase consistency optimization, receiving channel phase consistency optimization, radio frequency cable phase consistency optimization and antenna installation error optimization on an antenna; after a satellite enters an orbit, a calibration station is built on the ground, and error optimization is carried out through establishment of an error model and on-orbit calibration. According to the method, phase errors of all links in the positioning calculation process under an interferometer system can be optimized, and it is ensured that the target positioning precision of a satellite meets the requirement.

The invention discloses a welding strip cutting mechanism, and belongs to the technical field of welding strip machining equipment. A welding strip cutting mechanism comprises a tool bit assembly, a tool bit driving assembly and a cutter lifting assembly. The tool bit driving assembly is installed below the tool bit assembly, and the output end of the tool bit driving assembly is connected with the input end of the tool bit assembly so as to drive the tool bit assembly to operate. The cutter lifting assembly is installed at the bottom of the cutter head driving assembly, and the output end of the cutter lifting assembly is connected with the input end of the cutter head driving assembly so as to drive the cutter head driving assembly to do reciprocating lifting motion in the vertical direction. The cutter head assembly comprises a cutter shell, a first cutter and a second cutter; the first cutter and the second cutter are arranged oppositely and abut against each other to form a cutter assembly, and the cutter shell is arranged on the periphery of the cutter assembly in a sleeving mode. And a flow guide groove is formed in the side, facing the second cutter, of the first cutter, so that the influence of scaling powder and the like on the cutters is reduced, and the abrasion of the cutters is reduced.

The invention relates to a polyamide composite membrane containing a middle layer and a preparation method of the polyamide composite membrane. The polyamide composite membrane comprises a polyborosiloxane-based porous polymer substrate, a modified polyimide middle layer and a polyamide separation layer, a modified polyimide intermediate layer is loaded on the surface of the porous polymer substrate, and a polyamide separation layer is loaded on the surface of the modified polyimide intermediate layer. The polyborosiloxane-based porous polymer substrate and the modified polyimide intermediate layer have better compatibility, interface defects can be reduced, the overall performance of the membrane can be improved, moreover, the polyborosiloxane-based porous polymer substrate also has a self-healing characteristic, and after the polyborosiloxane-based porous polymer substrate is damaged, the self-healing property of the polyborosiloxane-based porous polymer substrate is improved. Fractured connection can be repaired without external stimulation (such as light and heat), and self-repairing of the substrate is achieved.

The utility model discloses an inclined shaft TBM cutterhead slag collecting and cleaning device which comprises a cutterhead, a slag collecting hopper (7) and a front shield (8), the cutterhead comprises a cutterhead center block (1) and a plurality of cutterhead side blocks (2), the cutterhead side blocks (2) are installed on the periphery of the cutterhead center block (1) in a surrounding mode, a bucket (3) is installed on the cutterhead side blocks (2), a discharging port of the bucket (3) is connected with the slag collecting hopper (7), and the slag collecting hopper (7) is connected with the front shield (8). A cleaning device (6) is fixedly installed on the back face of the cutterhead edge block (2) and located between the cutterhead edge block and the front shield (8). According to the utility model, the shutdown time of equipment caused by slag collection of the front shield can be greatly reduced, the utilization rate and the construction efficiency of TBM equipment are improved, and the labor intensity of slag removal operators is reduced at the same time.

The utility model discloses an automatic vibration feeding and conveying system for a lithium iron phosphate production line, which comprises a discharge storage device and a conveying mechanism, a flow-aiding stirring device is arranged at the top of the discharge storage device, and a flow-aiding stirring device is arranged at the bottom of the discharge storage device. A first weighing sensor used for weighing materials is arranged in the discharging storage device, and a plurality of conveying mechanisms used for conveying the materials are arranged at the top of the discharging storage device. The conveying mechanism comprises a vibrating feeder, a first switch valve, an adjusting valve, a rotary valve, a second switch valve, a powder storage device, a second weighing sensor, a first ventilation device and a stirring device, the second switch valve is arranged at the bottom of the powder storage device, and the material flow can be accurately controlled; according to the vibrating feeder, it is ensured that the materials are conveyed at the stable and uniform speed, the risks of material accumulation and blockage are reduced, and damage to the materials is small in the conveying process of the vibrating feeder.

The utility model discloses a modular bus duct structure resistant to lateral impact, which relates to the technical field of bus ducts and comprises two side support plates arranged in parallel, transverse connecting plates are arranged at the top end and the bottom end between the two side support plates, and the two transverse connecting plates are bent back and forth along the horizontal direction. The two transverse connecting plates are arranged oppositely, the top ends and the bottom ends of the conductive copper bars can be clamped at the bent positions formed by the two transverse connecting plates respectively, a gap is reserved between every two conductive copper bars while the transverse connecting plates are kept perpendicular, air can enter the conductive copper bars conveniently, heat dissipation of the conductive copper bars is facilitated, heat accumulation is reduced, and the service life of the conductive copper bars is prolonged. The insulating pads with the trapezoidal grooves can enhance the insulativity of the conductive copper bar on one hand, and the trapezoidal grooves are narrowed towards one side far away from the conductive copper bar, so that the fixing stability of the conductive copper bar can be enhanced, and the conductive copper bar is firmly clamped in the two vertically corresponding insulating pads.

The invention discloses a method and system for obtaining a diffusion coefficient of thermal cracking dissolved gas of insulating oil of a current transformer, and the method comprises the steps: constructing a molecular structure representing typical components of the insulating oil of an inverted oil-immersed current transformer, and carrying out the geometric optimization; constructing a first insulating oil model of the inverted current transformer; performing dynamic relaxation on the first insulating oil model to enable the first insulating oil model to reach a stable state; under different high-temperature conditions, reaction molecular dynamics simulation of insulating oil cracking is carried out, and a gas product of insulating oil thermal cracking is determined; constructing a second insulating oil model containing dissolved gas based on the gas product; performing dynamic relaxation on the second insulating oil model; performing dynamic simulation on the second insulating oil model, respectively applying different temperatures, and obtaining mean square displacement of any dissolved gas at different temperatures; and determining a diffusion coefficient curve of any dissolved gas in the insulating oil based on the mean square displacement of any dissolved gas at different temperatures.

The invention relates to the technical field of metal welding, and discloses a welding process of high-strength medium alloy carburizing steel, which comprises the following steps: preheating the whole weldment to 200-250 DEG C before welding; the overall temperature of a weldment is kept at 200-250 DEG C in the welding process; and after welding is completed, a weldment is integrally heated to 250-300 DEG C, and heat preservation is conducted for preset time. According to the scheme, a new preheating technology in the welding technology is provided for the high-strength medium alloy carburizing steel, overall preheating is adopted before welding, during welding and after welding instead of local preheating, the temperature ranges before welding and during welding are kept consistent, the temperature range after welding is slightly higher than the temperature ranges of the first two stages, it is advantageously kept that the temperature of a mother part in the whole welding stage is stable and uniform, and the welding quality is improved. The temperature gradient in the whole welding process is reduced to the minimum, and through appropriate process steps and welding parameters, it is guaranteed that weld joints do not have welding defects, and meanwhile the mechanical property requirements of products are met.

The invention discloses composite material laser welding equipment and a welding method, and belongs to the field of laser printing, the composite material laser welding equipment comprises a base plate, a wire feeding mechanism, a rotary shearing mechanism, a rolling mechanism and a laser heating mechanism are installed on the base plate, the laser heating mechanism comprises a first dovetail groove sliding table and a second dovetail groove sliding table, and the second dovetail groove sliding table is vertically and fixedly installed on the base plate; the first dovetail groove sliding table is located below the second dovetail groove sliding table, a first connecting plate is fixedly arranged on a carriage of the second dovetail groove sliding table, the first dovetail groove sliding table is fixedly installed on a second connecting plate in an obliquely downward mode, and the end, close to the rotary shearing mechanism, of the second connecting plate is hinged to the first connecting plate through a first connecting rod. And the other end of the second connecting plate is connected with the first connecting plate through a telescopic adjusting structure, a laser head is fixedly arranged on a dragging plate at the bottom of the first dovetail groove sliding table, the angle, height and focusing position of a laser beam can be controlled, and the welding requirements of composite materials of different shapes and sizes are met.

The utility model provides a coating gasket assembly and a coating device.The coating gasket assembly comprises a first gasket and a second gasket, the first gasket comprises a first main body, the first main body is provided with a first main flow channel and a first auxiliary flow channel, and the first main flow channel penetrates through the first main body at the first main discharging end; the first auxiliary runner penetrates through the first main body at the first auxiliary discharging end; the second gasket comprises a second main body, a second runner is arranged on the second main body, and the second runner penetrates through the second main body at the second discharging end; in the first direction, the interval between the first main discharging end and the first auxiliary discharging end is L1, the length of the first auxiliary discharging end is L2, the length of the first main discharging end is L3, the length of the second discharging end is L4, L3 is smaller than L4, and L4 is smaller than L1 + L2 + L3. The first gasket and the second gasket of the coating gasket assembly are matched for use, so that the stress of the negative pole piece can be improved during coating, and the use reliability of the battery monomer is improved. And moreover, the coated insulating material can provide insulation, is not easy to damage, and is small in coating amount.

The present invention discloses a transport device for processing edible agricultural products, and relates to the technical field of mechanized agricultural machinery manufacturing. The transport device for processing edible agricultural products comprises a transport plate, the bottom of the transport plate is rotatably connected to a rotating roller, both ends of the rotating roller are fixedly connected to moving wheels, the top of the transport plate is fixedly connected to a storage box, and the inner wall of the storage box is fixedly connected to a guide mechanism. The transport device for processing edible agricultural products produces a cooling effect on agricultural products by utilizing the direction of the inclined plate facing forward and the impact of the airflow, thereby slowing down the damage of the agricultural products. The inclined plate guides the airflow and then blows it between the bottom of the elastic plate and the storage box. The gas is filled into the elastic plate to produce a certain degree of bulging. When the elastic plate bulges, it will drive the movement of the agricultural products inside the storage box, reduce the accumulation of agricultural products, and create gaps between the agricultural products.

The invention relates to the field of laser tracker calibration, and particularly discloses a dynamic and static calibration device and method for a laser tracker, and the device comprises a connecting piece, and a dust cleaning piece, an air pipe, a cylinder and a communicating pipe which are arranged in the connecting piece. According to the dynamic and static calibration device and method for the laser tracker, when the communicating pipe is in the negative pressure state, the two dust cleaning pieces in the connecting piece are in the air suction state through the cylinder and the air pipe, so that dust and floating objects on the surface area of a target are sucked, and the calibration accuracy is improved.

The invention discloses a rainwater collecting and recycling treatment device, and relates to the technical field of rainwater treatment.The rainwater collecting and recycling treatment device comprises a plurality of splicing mechanisms used for building a rainwater collecting pool, the splicing mechanisms are internally provided with joining mechanisms for improving the supporting strength of the splicing mechanisms, and the splicing mechanisms are internally provided with joining openings. The first mounting pipe and the first taper pipe are connected in an inserted mode, tight butt joint between two parts is ensured, the first mounting pipe is inserted into the first taper pipe, the contact area is increased, the stability of the joint is improved, and the connecting block is clamped with the clamping pipe and the second clamping groove, so that the clamping effect is improved through the clamping mechanism. According to the connecting structure, the connecting blocks can be firmly spliced together to form a supporting net rack with high integrity, and when a plurality of cross-shaped connecting blocks are spliced together, the supporting capacity of the butt joint position of the first taper pipe is greatly enhanced, and deformation or breakage caused by water pressure or external loads is prevented.

The present invention discloses a method for cultivating activated sludge for efficiently treating coking wastewater. The present invention adopts bio-fortified strains and rice husk biochar to prepare a microbial immobilization carrier, and the carrier is added to a simulated coking wastewater activated sludge treatment system to form bio-fortified activated sludge, which is successively added to simulated coking wastewater with gradually increasing phenol concentration, simulated coking wastewater with gradually increasing nitrogen-containing heterocyclic compound concentration, and simulated coking wastewater with gradually increasing polycyclic aromatic hydrocarbon concentration for three times of acclimation to obtain activated sludge after the third acclimation, and the activated sludge is applied to treat simulated coking wastewater. The activated sludge after the third acclimation of the present invention can simultaneously and efficiently degrade multiple target pollutants in the simulated coking wastewater.

The invention discloses a device and a method for laser crystal growth based on a seed crystal reentry method. The device comprises a furnace body and a control system, the lifting mechanism is arranged in the furnace body and is fixedly connected with the top of the furnace body; the lifting mechanism is connected with a seed crystal support, a rotating mechanism is arranged on the seed crystal support, and a torque detection device is arranged on the rotating mechanism; the seed crystal support is used for loading seed crystals; a crucible is arranged under the seed crystal, a plurality of heating units are arranged around the crucible, a rotating magnetic field generator is also arranged around the crucible, and a cooling system is arranged around the rotating magnetic field generator. According to the device and method for laser crystal growth based on the seed crystal reentry method, the eddy current phenomenon in the laser crystal growth process is effectively restrained by accurately controlling the intensity and frequency of the rotating magnetic field and optimizing magnetic field distribution.

The invention discloses a preparation method of a super-hydrophobic nano coating, and relates to the technical field of nano coatings, and the preparation method specifically comprises the following preparation steps: step 1, under the temperature condition of 20-50 DEG C, ultrasonically dispersing 1.5-3 parts of modified nano silicon dioxide in 60-80 parts of deionized water, adding 1-4 parts of modified graphene oxide, stirring at the rotating speed of 800-1000 r / min for 15-30 min, and then adding 1-3 parts of a dispersing agent, and stirring at the rotating speed of 800-1000 r / min for 20-30 min; adding 0.8-1.5 parts of a tin dioxide core / shell structure, and continuously stirring for 24-72 hours to obtain a super-hydrophobic nano coating solution; and 2, coating the surface of the cleaned substrate with the super-hydrophobic nano coating solution by adopting a spraying, brush coating, dip coating or spin coating method, and naturally airing to obtain the super-hydrophobic nano coating. According to the invention, hydrophobic groups are introduced to the surface of nano silicon dioxide, long-chain organic groups are connected to the surface of silicon dioxide, and the organic groups can reduce the surface energy of the coating and increase the contact angle of water drops on the surface of the coating, so that the hydrophobicity of the coating is improved.