2752results about How to "Reduce concentration" patented technology

The invention discloses a method for in vitro slow release performance evaluation of a slow and controlled release preparation based on the overflow principle. A container with an upper outlet and a lower outlet is adopted to serve as a release tank, a to-be-detected medicine and a dissolution medium are placed in the release tank, a stirring device is adopted in the release tank to perform stirring, and the dissolution medium is added from the lower outlet of the release tank through a peristaltic pump; the dissolution medium dissolved with the medicine is taken away through the overflow from the upper outlet so as to offset medicine absorption or metabolism, and the slow and controlled release speed of the medicine, the total medicine overflow quantity and the total release amount are calculated by measuring the concentration of the medicine contained in the dissolution medium flowing out, the volume of the release tank and the overflow quantity. According to the method, the releasing degree of the slow and controlled release medicine can be evaluated accurately, the effective medicine release time of the slow and controlled release preparation is evaluated, and slow release performances of the slow and controlled release preparation are evaluated comprehensively.

The invention discloses a coal mine ventilation optimization and air quality regulation and control method based on adaptive learning, and relates to the technical field of coal mine ventilation optimization, and the method comprises the following steps: arranging a plurality of sensors in a mine, carrying out the real-time collection and monitoring of key environment parameters, and uploading the collected data to a central control system; and comparing the collected real-time data with historical data, and dividing the collected real-time data into conventional working condition data and abnormal working condition data according to environment states. Through real-time monitoring of various sensors and a deep learning algorithm, accurate ventilation control is achieved, a problem area is rapidly positioned in an emergency, airflow is dynamically adjusted, and safety of miners is guaranteed. According to the system, an LSTM model is adopted to predict an event trend in advance, preventive regulation and control measures are taken in time, real-time adjustment is supported, and the strain capacity is improved. Through a multi-stage ventilation mode, the system optimizes energy consumption and equipment operation efficiency, reduces unnecessary energy waste and maintenance cost, and realizes balance between safety and economy.

The invention relates to a coal mine fully-mechanized excavation face intelligent ventilation dust control and removal system based on an optimal coordination mechanism, and belongs to the technical field of coal mining. According to the system, through integrating a plurality of functional modules such as data processing, area control, optimal parameter calculation, execution control, safety guarantee and expert system evaluation, intelligent management of ventilation, dust control and dust removal is realized. The system adopts a method of combining fuzzy control and PID (Proportion Integration Differentiation) control, and automatically calculates and adjusts operation parameters of the air control device and the dust remover according to environmental parameters such as dust and gas concentration which are monitored in real time, so as to realize an optimal ventilation and dust control effect. Through training and prediction of a machine learning model, the system can autonomously learn and optimize technical parameters of a dust control and removal process, the adaptive capacity and the operation efficiency of the system are improved, the dust and gas concentration of a working face is effectively reduced, and health of workers and safe production are guaranteed. The invention aims to improve the environmental quality of the coal mine fully-mechanized excavation face and promote the intelligent development of the coal mine ventilation dust control and removal 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 belongs to the technical field of oil and gas field development, and particularly relates to a CO2 thickening agent for supercritical CO2 oil displacement and a preparation method of the CO2 thickening agent. The preparation method of the CO2 thickening agent for supercritical CO2 oil displacement comprises the following steps: (1) mixing a maleic anhydride compound and a styrene compound, dissolving in water, introducing inert gas, and heating; (2) slowly dropwise adding a mixed solution of a vinyl acetate compound and an initiator, and cooling after the reaction is finished; and (3) filtering, washing a solid phase by using an anhydrous alcohol substance, drying, and grinding to obtain a thickening agent product. The supercritical CO2 thickened by the thickening agent prepared by the invention can effectively slow down the viscous fingering phenomenon in the displacement process and improve the CO2 sweep efficiency, thereby improving the crude oil recovery rate.

The embodiment of the invention provides semiconductor process equipment. The equipment comprises a process chamber, a circulating purging device and a chamber ventilation device, the chamber ventilation device comprises an air inlet assembly and an exhaust assembly. The inflation assembly is used for introducing first purging gas into the process chamber; the gas inlet assembly is used for introducing second purging gas into the process chamber; the first purge gas is different from the second purge gas; the flow of the gas introduced into the process chamber by the gas inlet assembly in unit time is greater than the flow of the gas introduced into the process chamber by the gas inflation assembly in unit time, so that in the process of cleaning the process chamber, after the process chamber is primarily cleaned by the circulating purging device, the process chamber can be cleaned by the circulating purging device; according to the technical scheme, the second purging gas with the large flow provided by the chamber ventilation device is used for rapidly cleaning the process chamber, so that the concentration of the target gas in the process chamber is rapidly reduced to be below the safety value, and the chamber cleaning efficiency is improved under the condition that the health and safety of operators are guaranteed.

The invention provides lactobacillus reuteri HNU872 and application of the lactobacillus reuteri HNU872 in preparation of intestinal inflammation related products. The invention discloses how the Lactobacillus reuteri HNU872 effectively alleviates the phenotype of DSS-induced mouse enteritis. The invention also discloses a preparation method of the Lactobacillus reuteri HNU872. Research results show that the Lactobacillus reuteri HNU872 can significantly relieve weight loss caused by enteritis, improve colon length, significantly improve the level of anti-inflammatory cytokines in serum and reduce the concentration of pro-inflammatory cytokines. In addition, the expression of the intestinal tight junction protein ZO-1 is obviously promoted. The lactobacillus reuteri HNU872 can regulate diversity and structure of intestinal microbiota of mice, inhibit enrichment of pathogenic bacteria and relieve inflammatory response. According to the invention, the action mechanism of the lactobacillus reuteri HNU872 in improving enteritis is clarified, and a solid scientific basis is provided for developing a microbial product based on probiotics as an alternative treatment strategy for ulcerative colitis.

The invention discloses an inflammation-targeting bionic extracellular vesicle as well as a preparation method and application thereof, and particularly relates to the field of medicines. According to the invention, a new generation of aminoglycoside antibiotic teicoplanin (Teic), which is high in albumin binding rate and weak in intracellular antibacterial effect, is loaded on neutrophil-derived extracellular vesicles (NEV) with natural drug carrying capacity and inflammatory response chemotactic capacity to prepare the drug-loaded vesicles (Teic-NEV), wherein the new generation of aminoglycoside antibiotic teicoplanin (Teic) is used for loading the neutrophil-derived extracellular vesicles (NEV). The drug-loaded extracellular vesicle Teic-NEV can be used for targeted therapy of cells and tissues infected by MRSA (Methicillin-Resistant Staphylococcus Aureus). In vitro, the Teic (at) NEV can be used for destroying MRSA mature biological membranes and killing intracellular MRSA. According to the invention, the in-vivo and in-vitro biological safety of the TeicatNEV is evaluated. Therefore, the invention provides a certain theoretical basis for the application of NEV-based drug delivery in the field of intracellular bacteria treatment, and also provides a new treatment strategy for in-vivo targeted treatment.

The invention discloses application of a combined collecting agent in flotation of low-grade copper oxide ore, and belongs to the technical field of beneficiation flotation reagents. The combined collecting agent comprises a chelating agent and a xanthate collecting agent, the chelating agent is benzyl-N, N-dimethyl dithiocarbamic acid, the xanthate collecting agent is amyl xanthate, and the combined collecting agent is used for flotation of low-grade copper oxide ore. Ore is subjected to crushing, ore grinding, coarse separation and pulp mixing to obtain ore pulp to be floated, a gangue inhibitor is firstly added into the ore pulp, then sodium sulfide is added to activate copper oxide ore, and after activation, a combined collecting agent and a foaming agent are sequentially added to recover copper oxide minerals in the ore. Compared with a single xanthate collecting agent, the low-grade copper oxide ore combined collecting agent is small in agent dosage and convenient to add, the dosage of amyl xanthate serving as a collecting agent and the dosage of sodium sulfide serving as a vulcanizing agent are reduced, the beneficiation cost is reduced while the flotation recovery rate and grade of low-grade copper oxide ore are improved, and the low-grade copper oxide ore combined collecting agent is an environment-friendly agent.

The invention relates to a composite multi-effect scale and corrosion inhibitor and a preparation method thereof, and belongs to the technical field of water treatment agents.The composite multi-effect scale and corrosion inhibitor is prepared from carboxylic acid monomers, sulfonate monomers, organophosphorus compounds, modified chitosan, modified nanometer titania, oxidation type initiators, reduction type initiators, azole derivatives and the like, the modified chitosan is formed by coating the surface of chitosan with cerium chloride; the modified nano titanium dioxide is formed by coating the surface of nano titanium dioxide with sodium polyaspartate. The composite multi-effect scale and corrosion inhibitor is prepared in a mode of compounding while synthesizing, the scale inhibition effect is excellent, the comprehensive descaling capacity can reach 97% or above, and the composite multi-effect scale and corrosion inhibitor can be used for a high-pH, high-alkalinity, high-temperature and high-hardness circulating cooling water system under the high-concentration-multiple operation condition; the method is suitable for circulating cooling water treatment requirements under harsh conditions in industries such as chemical industry, smelting and light industry.

The invention relates to the technical field of combustible gas detectors, in particular to a combustible gas detector with an underground Internet of Things function, which comprises a gas exchange seat, a mounting mechanism rotatably connected to the bottom of the gas exchange seat, a combustible gas detector main body fixedly mounted at the bottom of the gas exchange seat, and a fixing frame fixedly connected to the bottom of the gas exchange seat. A movable frame is arranged on the fixed frame in a sliding fit mode, a protective cover is rotatably connected to the interior of the movable frame, an automatic maintenance mechanism is rotatably connected to the movable seat, and in the using process of the combustible gas detector, dust on the surface of the gas sensor is cleaned and maintained regularly through the automatic maintenance mechanism; the dust on the surface of the gas sensor can be automatically cleaned by utilizing the brush frame which rotates and swings in a reciprocating manner, the sensor can accurately read the gas concentration, the possibility of false alarm and missing alarm is reduced, the manual cleaning frequency is reduced through an automatic maintenance mechanism, and the labor cost and the maintenance workload are reduced, so that the service life of the sensor is prolonged.

The invention discloses an ultra-low emission treatment system and device for Maotai-flavor liquor production wastewater, the wastewater passes through a combination of a rotary mechanical fine grid and a self-cleaning rotary fine grid, and various solids in the wastewater are thoroughly removed; in the pretreatment, precipitation and air floatation are combined, and a phosphorus removal agent, a coagulant and a flocculant are properly added, so that the phosphorus removal burden in the subsequent treatment is reduced. A UASB anaerobic reactor is adopted in the anaerobic treatment section, so that the phenomena of acidification and the like are not easy to occur. The biological treatment adopts an improved two-stage AO treatment process and is combined with an MBR (Membrane Bioreactor), so that the removal effect of COD (Chemical Oxygen Demand) and total nitrogen can be integrally improved, and the suspended solids, COD and total nitrogen concentration in effluent are reduced. In the deep treatment stage, catalytic ozonation and an MBBR biological treatment device are adopted, and a combined process of an efficient sedimentation tank and ultrafiltration / nanofiltration is combined; ozone catalytic oxidation enhances the oxidation capacity of ozone, and improves the B / C ratio and biodegradability of wastewater; mBBR biological treatment has the characteristics of a membrane method and a suspension method, and COD and total nitrogen in the wastewater are further effectively reduced.

The invention relates to the field of environmental remediation, and discloses a remediation method for high-concentration organic pollutants in soil, which comprises the following steps: firstly, injecting a nano zero-valent iron (nZVI) suspension into the contaminated soil for chemical reduction treatment, then adding sodium persulfate for oxidation treatment, and then adding a nano zero-valent iron (nZVI) suspension into the contaminated soil; the complex organic pollutants are converted into biodegradable intermediate products; then, two-stage microbial communities are introduced in sequence, the first-stage microbial community is used for degrading alcohol and ketone intermediate products, the second-stage microbial community is used for degrading organic acid intermediate products, and thorough mineralization of pollutants is achieved. According to the method, the pollutant degradation rate and the final removal effect can be remarkably improved, and the method is suitable for treatment scenes of various high-concentration organic pollutants and has high adaptability and economic benefits.

The explosion-proof cooling device for the underground coal mine comprises a frame, an air-cooled condenser, a compressor unit, a shell-and-tube evaporator and a base are installed in the frame, and a programmable control box is installed at the left end of the frame; the air-cooled condenser is used for heat dissipation and cooling of coolant compressed gas; the compressor unit is used for compressing a gas refrigerant and comprises an oil separator, a double-screw compressor, a first motor, a double-loop reversible vacuum electromagnetic starter, a liquid storage tank, a first drying filter and a second drying filter; the shell-and-tube evaporator is used for heat exchange between high-temperature nitrogen and a low-temperature refrigerant. According to the cooling device, a refrigerant used when the cooling device works can be recycled, the investment of resources and cost of the part is reduced, the refrigeration cost is saved, nitrogen in the device can rapidly and continuously release low-temperature nitrogen, the air temperature in a large range of a mining area is efficiently achieved, air is inerted, the oxidation spontaneous combustion rate of coal is reduced, and gas explosion is restrained; the mining area safety is improved.

The invention provides a method for producing pullulan by aureobasidium pullulans, which is characterized in that a microbial conversion method is adopted for the first time, and pullulan is produced by catalyzing conversion of fructooligosaccharide through an enzyme reaction liquid, and the pullulan is produced by taking an aureobasidium pullulans seed culture solution as a carrier, fructooligosaccharide as a substrate and the enzyme reaction liquid as a catalyst. In a 5.0 L biological reaction container, a mode of one-time substrate addition or multiple feeding of fructooligosaccharide and enzyme reaction liquid is adopted, catalytic reaction is performed for 60-72 hr, 61.43 g / L-71.43 g / L of fructooligosaccharide is consumed together, the highest yield of pullulan is 60.2 g / L-64.26 g / L, and the conversion rate of fructooligosaccharide is up to 87.5%-97.98%. Compared with the existing method for producing the pullulan by a fermentation method, the biotransformation method can solve the problem of insufficient enzyme amount of catalytic reaction depended in the pullulan synthesis process on one hand, and also can solve the problem of reverse regulation of the substrate and the product on pullulan synthesis in the pullulan synthesis process on the other hand; and the problems of low substrate carbon source utilization rate, low substrate conversion rate and the like caused thereby are solved.

The invention discloses a sewage sludge advanced treatment device, which belongs to the technical field of sludge treatment, and comprises a flocculation basin and a dehydration device, a concentration adjusting tank is arranged between the flocculation basin and the dehydration device, the inside of the tank is divided into a high-concentration area and a low-concentration area through a filter plate, the high-concentration area is provided with a first liquid inlet pipe, and the low-concentration area is provided with a second liquid inlet pipe; flowing into a dehydration device through a mixing pump; the filter plate is controlled by a driving mechanism to move so as to change the volume of the high-concentration area, and a first concentration detector is mounted on the first liquid inlet pipe and is used for moving the filter plate to reduce the volume of the high-concentration area when the first concentration detector detects that the concentration is lower than a threshold value; a control valve is installed on the second liquid inlet pipe and used for opening the control valve when the first concentration detector detects that the concentration is larger than the threshold value. The concentration regulating tank is arranged between the flocculation tank and the dehydration device to regulate the concentration of the sludge, so that the concentration of the sludge input into the dehydration device is stable, and the qualified rate of sludge caking is ensured.

The utility model discloses a methanol storage cabin with isolated void cabins, which comprises a methanol fuel ship main body, a methanol storage cabin and a methanol daily cabin are arranged in the methanol fuel ship main body, the isolated void cabins are arranged around the methanol daily cabin, an inert gas generator is further arranged in the methanol fuel ship main body, and the inert gas generator is connected with the isolated void cabins. The methanol storage cabin is arranged in the methanol fuel ship main body, a hydraulic deep-well pump is arranged in the methanol storage cabin, pressure sensors are arranged in the methanol storage cabin and the methanol daily cabin, the methanol storage cabin is arranged in the methanol fuel ship main body, and an isolation void cabin is arranged around the methanol storage cabin. An inert gas generator and an inert gas storage box are arranged in the methanol fuel ship main body, the inert gas storage box is communicated with the isolation void through a third gas conveying pipe, and inert gas is filled into the isolation void through the inert gas storage box, so that the concentration of combustible gas in the isolation void is lower than the lower limit explosion concentration of methanol.

The invention relates to the technical field of contaminated soil remediation, in particular to a heavy metal contaminated soil remediation composition and a preparation method and application thereof. The heavy metal contaminated soil remediation composition is composed of a microbial agent for heavy metal treatment and a Fe3O4 (at) TiO2 (at) C material, and the microbial agent for heavy metal treatment is loaded on the Fe3O4 (at) TiO2 (at) C material. According to the composition, physical remediation, chemical remediation and biological remediation can be conducted at the same time, Fe3O4 and C are adopted to generate a physical adsorption effect on heavy metal ions, so that the heavy metal ions are enriched on the composition, Fe3O4 and TiO2 and C are adopted to conduct chemical photocatalytic degradation on the heavy metal ions, then microorganisms are adopted to conduct conversion on the heavy metal ions, and therefore the heavy metal ions can be effectively degraded. Efficient treatment of soil heavy metal ions is achieved through the composition.

The invention provides a detoxification method and system based on nanofiltration treatment of lithium ore smelting slag, and the method comprises the following steps: step S1: carrying out acid leaching treatment on the lithium ore smelting slag by using an inorganic acid liquid, so that acid-soluble components in the lithium ore smelting slag are dissolved in the inorganic acid liquid to obtain an acid leaching liquid and detoxified smelting slag; s2, the acid leaching solution is subjected to oxidation treatment, metal ions with intermediate valence in the acid leaching solution are oxidized into metal ions with high valence, and an oxidized acid leaching solution is obtained; s3, carrying out nanofiltration treatment on the oxidized pickle liquor to intercept high-valence metal ions in the oxidized pickle liquor so as to obtain concentrated liquor and permeate liquor; s4, using the permeate liquid as the inorganic acid liquid in the step S1 for acid leaching treatment. According to the method, toxic components in the lithium ore smelting slag can be fully separated, and resource utilization is easier.

The invention relates to the technical field of plant tissue culture, in particular to a monstera deliciosa tissue rapid propagation method and application thereof.The monstera deliciosa tissue rapid propagation method comprises the steps that a monstera deliciosa near leaf petiole is selected, a cleaned explant is cut into small sections to be inoculated into a primary cluster bud induction culture medium for primary induction culture, and a monstera deliciosa tissue culture medium is obtained; carrying out subculture cluster bud multiplication culture after primary induction, then carrying out strong seedling culture, and finally carrying out rooting culture. According to the method, the pollution rate can be controlled within 45%, the disinfection injury and death rate of the explants can be controlled within 14%, the induction rate of primary cluster buds is 70% or above, the multiplication coefficient is stabilized at about 4.0, the rooting rate reaches 99.8% or above, and rapid propagation of monstera deliciosa is achieved.

The invention belongs to the technical field of coal mine dust prevention, and relates to a fully mechanized coal mining face pedestrian area dust treatment method and device.The device mainly comprises a hydraulic support, an injection dust removal device, a dust removal control box, a main control box and a coal mining machine, the hydraulic support is used for supporting a coal mining face, and the injection dust removal device is arranged at the top of the hydraulic support; the device is used for generating negative pressure to suck and purify dust-containing airflow in a pedestrian area below the hydraulic support. The dust removal control box receives working signals of the hydraulic support and the coal mining machine, controls the injection dust removal device and is electrically connected with the main control box and the automatic pressure regulating valve. A locator is arranged on the leeward side of the coal mining machine to identify the position of the coal mining machine The device purifies dust-containing airflow through spray injection, covers a roadway bottom plate and a dust production area of the scraper conveyor, captures and wets coal dust, reduces raised dust and transverse diffusion of dust, reduces the dust concentration of a pedestrian area, improves the working environment and reduces dust harm.

The invention belongs to the technical field of welding, and discloses a dissimilar metal power modulation galvanometer laser welding method which comprises the following steps: finely cleaning a 6061 aluminum alloy and a 304 stainless steel plate by using acetone, and then airing for more than 20 minutes; the aluminum steel sheet is assembled, pressed and fixed on a welding test platform in a steel-up-aluminum-down mode; the position of the welding test platform is adjusted, argon serves as welding protection gas, and a protection gas nozzle is arranged to be aligned with a welding pool area; laser welding parameters are set, a laser power modulation mode is set to be a gradient power mode, and the gradient power mode is to regulate and control phase point laser power in a circular scanning track in the advancing direction of a welding seam; a welding test is carried out in the mode that a galvanometer laser head is fixed and a welding test platform is moved, and a laser and the welding test platform are synchronously started and stopped; and the protective gas is started 5 seconds before the laser is started, and after the laser is stopped, the protective gas is stopped lagging for 10 seconds so as to continuously protect the welding seam and prevent oxidation.

The invention discloses a multifunctional automatic laser cutting machine, and relates to the technical field of laser cutting, the multifunctional automatic laser cutting machine comprises a base, a support is fixedly mounted at the top of the base, a first motor is fixedly mounted at the top of the support, a threaded rod is fixedly mounted at the output end of the first motor, and a sleeve is in threaded connection with the threaded rod; a clamping device is arranged at the top of the base, a collecting device is arranged at the top of the base, a ventilation device is arranged at the top of the clamping device, and the clamping device comprises an electric push rod, cutting equipment, a laser head, a bevel rod, a cutting table, a clamping plate, a first bevel block, a connecting rod and a protective plate. A workpiece can be effectively fixed to the cutting table, the workpiece is prevented from moving or shaking in the laser cutting process, the cutting precision is improved, and the connecting rod moves to drive the protection plate to move.

The invention relates to the technical field of metal surface treatment, and discloses sheet metal part spraying and plastic spraying equipment and a technological method.The sheet metal part spraying and plastic spraying equipment comprises a spraying chamber and a conveying mechanism, the spraying chamber is arranged in the middle of the conveying mechanism, and a material distributing plate is installed at the top of the spraying chamber; two spraying mechanisms are arranged on the side, close to the material distributing plate, of the interior of the spraying chamber, a plurality of evenly-distributed spraying guns are arranged in the two spraying mechanisms, an air pressure tank and a conveying pipe are installed on the side, close to the material distributing plate, of each spraying gun, and a pump body is installed on the side, away from the spraying guns, of each conveying pipe; and a paint storage tank is arranged on the rear side of the spraying chamber. The position and the angle of the spraying gun are accurately controlled, and the automatic adjusting device is utilized, so that the spraying gun can be dynamically adjusted according to the surface shape and the size of the sheet metal part, and all corners of a workpiece are uniformly and comprehensively covered with paint.

The invention discloses a rotary counter-hedge industrial waste gas desulfurization system and a process thereof, comprising a reaction cylinder, wherein a top cover is fixedly connected to the top of the reaction cylinder, and an air inlet pipe is arranged on one side of the top cover; the rotary stirring action of the transmission blades is helpful to maintain the uniform distribution and flow state of the gas-liquid two phases in the mixing cylinder, which can accelerate the material diffusion and mass transfer process, and can increase the gas-liquid contact surface, thereby improving the efficiency of the desulfurization reaction; at the same time, the dirt, sediment and residue on the inner wall surface of the reaction cylinder and the mixing cylinder are cleaned by a soft scraper and a cleaning brush, thereby reducing the obstruction of the dirt to the gas-liquid reaction, allowing the gas and liquid to flow and mix more smoothly, thereby improving the desulfurization efficiency of the equipment, and the continuously rotating nozzle can make the reaction liquid spray into the waste gas in a more uniform and wider manner, thereby increasing the contact area of ​​the gas-liquid two phases, thereby accelerating the mixing effect between the waste gas and the reaction liquid.

The invention belongs to the field of engine aftertreatment systems, and provides a composite two-stage SCR system, a control method, an aftertreatment system.The system comprises a first SCR, a first ASC, a DOC, a DPF, a second SCR, a second ASC, a calculation control unit, an electric heating device, a gas concentration detection unit and an exhaust temperature unit; and the control unit is used for determining a urea injection control strategy of the first SCR and the second SCR and a working strategy of the electric heating device according to the nitrogen oxide concentration and the nitrogen dioxide proportion detected by the gas concentration detection unit and the temperature obtained by the exhaust temperature unit, and respectively controlling the first SCR, the second SCR and the electric heating device to work according to the determined strategies. According to the invention, the cooperative control requirement of ultralow nitrogen oxide emission and nitrous oxide gas emission limitation of the diesel engine can be met.

The invention discloses crushing and recycling equipment for glass product processing, and relates to the technical field of glass waste recycling equipment.The crushing and recycling equipment comprises a rotating shaft, a crushing roller is fixedly connected to the outer side of the rotating shaft, an annular groove is formed in the outer side of the crushing roller, and a protruding block is fixedly connected to the outer side of the crushing roller; fixing rods are slidably connected to the inner walls of the annular grooves, fixing plates are fixedly connected to the ends, away from the smashing rollers, of the fixing rods, and compression springs are fixedly connected to the ends, close to the fixing rods, of the fixing plates. According to the crushing and recycling equipment for glass product processing, the elastic property of a compression spring is utilized, extrusion is generated among a convex block, glass and a fixing plate, the glass is too hard, so that the fixing plate exerts force on the compression spring, the fixing plate drives a fixing rod to move in the direction of a rotating shaft, and then the too hard glass smoothly passes through a crushing roller; and the crushing roller is prevented from being damaged to influence the service life of the crushing roller of the equipment.

The invention provides a super junction device and a manufacturing method thereof. The super junction device comprises a gallium oxide substrate; the N-type epitaxial layer is positioned on the surface of the gallium oxide substrate, and a high-resistance layer is formed in the surface of one side, far away from the gallium oxide substrate, of the N-type epitaxial layer; the multi-stage grooves are located in the N-type epitaxial layer, each multi-stage groove comprises N sub-grooves arranged in the first direction, the sizes of the N sub-grooves in the second direction are not completely the same, N is not smaller than 3, the first direction is perpendicular to the plane where the gallium oxide substrate is located and points to the gallium oxide substrate, the second direction is perpendicular to the plane where the gallium oxide substrate is located, and the third direction is perpendicular to the plane where the gallium oxide substrate is located. The second direction is perpendicular to the first direction; the first P-type oxide layer covers the surface of the multi-stage groove, and the surface of the multi-stage groove comprises the bottom of the multi-stage groove and the side wall of the multi-stage groove. The super junction device is high in voltage resistance and low in process difficulty.

The invention relates to a water ecological restoration system and a restoration method, and belongs to the technical field of water treatment. According to the water ecology restoration system, a retaining wall is arranged on the downstream of the junction of a branch and a river channel, and the river channel is divided into a restoration flow channel and a main flow channel through the retaining wall; a water inlet adjusting mechanism, a desilting cavity, a filter dam, a biochemical treatment cavity, a first overflow dam, an oxygenation cavity, a second overflow dam, a biological protection cavity and a water outlet adjusting mechanism are sequentially arranged on the remediation flow channel from upstream to downstream, a buffer pond is arranged on the river bank side of the biological protection cavity, a planting floating bed is arranged in the biological protection cavity, hygrophytes are planted on the planting floating bed, and a water outlet adjusting mechanism is arranged on the water outlet adjusting mechanism. Submerged plants are arranged at the bottom of the buffer pond. According to the device, aquatic organisms such as fishes can be sheltered, water can be purified, the water ecological restoration effect is good, facilities can be prevented from being destroyed by flood, and the aquatic organisms are protected during flood discharge.

The invention discloses a flame retardant with a double-layer microcapsule structure, a flame-retardant polyurethane material as well as a preparation method and application of the flame-retardant polyurethane material, and belongs to the technical field of flame retardants. The material is a multifunctional flame retardant with a double-layer core-shell structure, a shell layer is calixarene boric acid resin, a middle shell layer is melamine phthalic anhydride resin, and a core layer is hydroxyapatite modified aluminum hypophosphite. Due to the high cross-linking degree between polymers, the flame retardance of polyurethane is improved, meanwhile, the mechanical property of the polyurethane is improved, and the flame retardance and seawater corrosion resistance of the material are synergistically enhanced through hydroxyapatite dispersed in the core layer. The double-shell layer has excellent hydrophobicity, prevents internal aluminum hypophosphite from being affected with damp and has anti-fouling and self-cleaning effects, and the prepared flame-retardant polyurethane composite material has excellent tensile and flexible characteristics due to a double network of hydrogen bonds and covalent bonds.