34results about How to "Improve fluidity" patented technology

The invention provides an ultrahigh-ductility cement-based composite material for ocean engineering and a preparation method of the ultrahigh-ductility cement-based composite material for ocean engineering. The concrete is prepared from the following raw materials in parts by weight: 250 to 500 parts of cement clinker, 400 to 600 parts of fly ash, 200 to 300 parts of mineral powder, 100 to 150 parts of silica fume, 160 to 240 parts of metakaolin, 600 to 900 parts of quartz sand, 10 to 20 parts of organic synthetic fiber, 20 to 30 parts of organic corrosion inhibitor, 180 to 240 parts of water and 1 to 8 parts of water reducing agent. The organic corrosion inhibitor provided by the invention can be combined with chloride ions to form a passive film, so that the corrosion of reinforcing steel bars and the invasion of the chloride ions into concrete are inhibited, and the durability of the concrete is improved; by regulating and controlling the mixing ratio of the four mineral admixtures and the mixing amount of the synthetic fiber component, the concrete can well consider high strength, high ductility, high durability, high flow state and excellent deformation resistance. The ultrahigh-ductility concrete for ocean engineering, which can meet the toughness requirements of high compression resistance, fracture resistance and impact resistance and the requirements of high chloride ion permeation resistance and steel bar corrosion resistance, can be obtained.

The utility model relates to the field of water conservancy and hydropower engineering, in particular to a novel combined energy dissipater. The novel combined energy dissipater comprises a combined step located on a drainage section, the combined step is formed by connecting a W-shaped step and a V-shaped step in the direction perpendicular to water flow, a trapezoidal energy dissipation pier is arranged on the horizontal plane of each step of the combined step, and the vertical face of each step of the combined step is folded inwards to form a concave angle. The bottom of the combined step is connected with the water inlet end of the stilling pool, at least one row of opposite impact type stilling piers are arranged in the stilling pool in the transverse direction, and a plurality of wedge-shaped tail piers are arranged at the tail of the stilling pool and combined with the tail sill. According to the novel combined energy dissipater, a more comprehensive energy dissipation facility is provided, single energy dissipation is converted into multi-element energy dissipation, the better energy dissipation effect is achieved, meanwhile, the work amount is reduced, and the combined energy dissipater is more convenient and simpler.

The utility model discloses a novel diversion trash rack for a water intake of a hydropower station, relates to the field of water conservancy and hydropower engineering, and aims to reduce hydraulic loss after water flows through the water intake of the hydropower station and is preliminarily filtered. According to the technical scheme, the novel hydropower station water intake flow guide trash rack comprises an annular frame body and a plurality of flow guide plates fixedly installed on the frame body, the plate faces of the flow guide plates are parallel to one another and are perpendicular to the corresponding plane of the frame body, the flow guide plates are in a streamline shape, the outer contours of the flow guide plates on the first section are isosceles trapezoids, and the outer contours of the flow guide plates on the second section are isosceles trapezoids. The first section is parallel to the plate surface of the flow guide plate and passes through the center of the flow guide plate, the sides, corresponding to the upper bottom, of the two waists of the isosceles trapezoid are upstream faces, the side, corresponding to the lower bottom, of the isosceles trapezoid is a downstream face, diagonal planes are arranged between the upstream faces and the two plate surfaces, and chamfers are arranged on the plate surface of the flow guide plate and corner angles between the upstream faces and the diagonal planes respectively. The device is used for being arranged at the water intake of the hydropower station to guide and filter water flow.

The present invention is a method for preparing spherical crystals of 3,4-dinitrofurazan-based furazan oxide, and relates to the technical field of energetic crystal materials. The method comprises: 1) fully dissolving 3,4-dinitrofurazan-based furazan oxide, a crystallization solvent, and a crystallization additive; 2) lowering the temperature while stirring to form a supersaturated solution, and keeping the temperature for a period of time when a crystal nucleus appears; 3) continuing to lower the temperature while stirring until it drops to room temperature; 4) filtering, washing, and drying to obtain the product. The DNTF crystals obtained by the present invention have a very high degree of sphericity, a regular crystal morphology, a smooth surface, few transparent defects inside the crystal, and good fluidity. The process of the present invention is simple, easy to control, and the crystallization mother liquor can be recycled, which is conducive to reducing the pollution of the organic solvent to the environment, is low in cost, safe and reliable, and is suitable for industrial mass production.

The utility model provides a Roots vacuum pump rotor and a Roots vacuum pump, and belongs to the technical field of vacuum pumps. The Roots vacuum pump rotor comprises a rotating shaft and at least one stage of rotor component arranged in the axial direction of the rotating shaft. The rotating shaft is provided with an air inlet channel in the axial direction. Any stage of rotor component is provided with at least one group of jet channels along the axial direction, the jet inlets of the jet channels are communicated with the air inlet channels, and the jet outlets of the jet channels are positioned at the blade tops of the rotor components; an external air source flows into the jet flow channel along the air inlet channel and is sprayed out through jet flow generated by the jet outlet, and the jet flow movement direction of the jet outlet is consistent with the rotation direction of a rotor of the roots vacuum pump. By arranging the jet flow channel on the rotor and assisting external air source input, loss caused by leakage between the rotor and the inner wall face of the pump shell is reduced, the backflow impact influence at a pump outlet is effectively reduced, the flow state in the vacuum pump shell is improved, heat generated in the operation process of the vacuum pump can be taken away, and the refrigeration effect is achieved.

The invention relates to a high-thermal-conductivity ceramic-based composite material and a preparation method thereof. The method comprises the following steps: preparing a carbon nanotube fiber preform; preparing a pyrolytic carbon interface layer on the fiber surface of the carbon nanotube fiber preform through a CVD method to obtain a carbon nanotube fiber preform with the pyrolytic carbon interface layer; uniformly dispersing boron nitride in the SiBCN precursor solution through sanding and high-pressure homogeneous dispersion technologies to obtain a BN / SiBCN precursor solution; and reacting the BN / SiBCN precursor solution with the carbon nanotube fiber preform with the pyrolytic carbon interface layer through a PIP process to prepare the ceramic-based composite material with high thermal conductivity. According to the method disclosed by the invention, the prefabricated body is obtained by weaving the carbon nanotube fibers, the high flexibility and high thermal conductivity of the carbon nanotube fibers are fully exerted, and BN is uniformly introduced into a SiBCN ceramic matrix as a high-thermal-conductivity phase through specific sanding and high-pressure homogeneous dispersion technologies, so that the thermal conductivity of the composite material is further improved.

The invention relates to a hafnium-based ultrahigh-temperature ceramic-based composite material and a preparation method thereof. The method comprises the following steps: mixing and weaving carbon nanotube fibers and PAN-based carbon fibers to obtain carbon nanotube fiber / carbon fiber bidirectional cloth; preparing the carbon nanotube fiber / carbon fiber bidirectional cloth into a sharp wedge profiling preform by adopting a lamination sewing process; preparing a pyrolytic carbon interface layer on the fiber surface of the sharp wedge profiling preform through a chemical vapor deposition method; the hafnium-zirconium composite ceramic precursor solution is used for dipping and filling internal pores of the sharp wedge profiling preform with the pyrolytic carbon interface layer, and the hafnium-based ultrahigh-temperature ceramic-based composite material is prepared through curing and cracking reaction. The carbon nanotube fiber / carbon fiber bidirectional cloth is woven to obtain a novel structure sharp wedge profiling preform, and a hafnium zirconium carbon solid solution is introduced as a ceramic matrix, so that the ablation resistance, the mechanical property and the heat conductivity of the ceramic matrix composite material are remarkably improved; the problem that a ceramic-based composite material prepared by a traditional technology is insufficient in ablation resistance and thermal conductivity is solved.

This utility model discloses an aeration system, particularly an aeration system for a deep-type spillway gate, belonging to the field of hydraulic engineering structure design and manufacturing technology. It provides an aeration system for a deep-type spillway gate that effectively improves the flow pattern of downstream water, thereby effectively reducing cavitation damage. The aeration system includes a high concrete dam and deep-type spillways and an arc-shaped working gate structure arranged on it. An outlet maintenance platform is provided at the outlet end of the arc-shaped working gate structure. It also includes a erosion-reducing drop and an outlet air supply structure, arranged on the high concrete dam in accordance with the location of the outlet maintenance platform. During flood discharge, the main cavitation cavity formed by the gate pier, the outlet maintenance platform, the lower edge of the outlet water jet, and the working sill of the arc-shaped working gate structure expands with the cooperation of the erosion-reducing drop. The cavitation damage within the main cavitation cavity is reduced or partially eliminated by the air supplied by the outlet air supply structure.

The flying wing type rechargeable underwater cruise underwater glider comprises a flying wing type shell, a main pressure-resistant cabin is installed on the top of the flying wing type shell, and a temperature difference energy power generation system, an underwater cruise system, an ocean current energy power generation system and a buoyancy adjusting system are sequentially and symmetrically installed on the two sides of the main pressure-resistant cabin; the ocean current energy power generation system comprises a power generation system, a supporting system and a retractable mechanism, the top of the supporting system is provided with the power generation system, and the bottom is connected with the retractable mechanism; the power generation system comprises an impeller system, and an impeller of the impeller system can stretch out, draw back and be folded. The system can be freely switched among three working modes of underwater gliding, underwater residing and underwater cruising, and tasks can be executed for a long time. According to the flying wing type underwater glider, the running system and the ocean current energy power generation system can be adjusted by the retracting and releasing system to rotate, the appearance of the flying wing type underwater glider is not changed while the underwater residence, cruising and power generation functions of the glider are achieved, and the excellent fluid performance in the gliding working mode is guaranteed.

The utility model discloses sludge cutting equipment which comprises a bottom frame and a cutting shell, the cutting shell is fixedly installed on the head portion of the bottom frame, the cutting shell comprises a half shell and external connection pipes, the external connection pipes are arranged at the two ends of the half shell, the external connection pipes and the half shell are integrally formed, a buckling cover is arranged at the upper end of the half shell, the buckling cover is detachably connected with the half shell, and the external connection pipes are arranged on the half shell. A sealing ring is installed between the buckling cover and the half shell, and a multi-groove partition plate is fixedly installed in the buckling cover. According to the utility model, the buckling cover is arranged on the cutting shell, so that sealing can be conveniently carried out through the buckling cover, good sludge drainage can be ensured, auxiliary cutting can be carried out through the multi-groove partition plate and the cutting frame which are arranged in the buckling cover in the sludge drainage process, and a good through-flow effect is ensured; and when maintenance is needed, the multi-groove partition plate and the cutting frame can be quickly disassembled by disassembling the buckling cover, and operation is very convenient.

The invention relates to the technical field of mobile phone glass processing, and discloses a perforated glass liquid polishing method based on swing stirring, which comprises the following steps: S1, preparing an acid liquid polishing agent with a preset concentration in a pickling tank; s2, loading the perforated glass by adopting a clamp, and immersing the glass in the acid liquid polishing agent in the pickling tank; and S3, the clamp is driven to move, so that the glass with the holes translates along the circumferential path in the vertical plane at a constant speed along with the clamp. According to the liquid polishing method for the perforated glass, the perforated glass moves in the vertical plane, so that the flow state of the acid liquid polishing agent around the hole site on the glass is improved, the flow direction of the acid liquid polishing agent around the hole site is uniformly changed, and the corrosion conditions around the hole site are similar everywhere; therefore, the flow mark problem caused by acid polishing around the hole site is solved, the product appearance is ensured, and the yield of the acid polishing operation of the glass with the hole is improved.

The fluorene derivative of the present disclosure is represented by the following formula (1): Wherein R1 represents a substituent, k denotes an integer of 0 to 8, R2a, R2b, R2c, and R2d each represent a hydrogen atom or a substituent, R3a and R3b each represent a hydrogen atom or a substituent, and X1a and X1b each represent a group defined in the following formula (X1): wherein R4 and R5 each represent a hydrogen atom or an aliphatic hydrocarbon group, provided that the case where both R4 and R5 are a hydrogen atom is excluded; or R4 and R5 bond together to form a heterocyclic ring containing the nitrogen atom adjacent to R4 and R5. The present disclosure provides a novel fluorene derivative useful as an additive for improving the properties of a resin, a method for producing the same and a use thereof.

The utility model provides a permanent magnet motor direct drive type shaft vertical submersible pump which comprises a water guide and suction horn mouth, a vertical submersible pump section and a water outlet shaft which are sequentially connected in the water flow direction, a vertical permanent magnet motor is arranged in the water outlet shaft, and the vertical submersible pump section is in direct connection transmission by being connected with the permanent magnet motor. The hydraulic model of the pump section of the vertical submersible pump is a conventional hydraulic model. A submersible asynchronous motor and a transmission gear box of a traditional conventional vertical submersible pump are replaced by the permanent magnet motor with the small size, and a hydraulic model of a pump section of the vertical submersible pump is a conventional hydraulic model, so that a novel vertical submersible pump group structure is formed; the structure can directly utilize an excellent conventional pump section hydraulic model which is already inspected and identified, meanwhile, the permanent magnet motor is adopted, the outer diameter of the motor is small, water flow at the tail of the motor is stable, hydraulic loss is small, the permanent magnet motor has the advantages of being low in rotating speed, a transmission gear box can be omitted, the pump device is directly connected with a water pump for transmission, and the internal flow state of the pump device is improved.

The utility model provides a disinfection water supply system for domestic water of a protective project, and aims to solve the problem that the water quality of stored water in the traditional protective project becomes poor due to municipal secondary transportation and avoid the hidden danger that the water in the protective project may become dead water due to long residence time. The system mainly comprises a domestic water tank, a variable-frequency water supply system and a circulating dosing system, after the water storage tank is put into use, the circulating pump is operated regularly, so that water is prevented from becoming stagnant water due to overlong retention time in the water tank, and the activity of stored water is remarkably improved. The short flow influence is reduced by cooperating with the stainless steel flow guide plate, and after the circulating water enters the water tank, a rotational flow preventing device is arranged in the vertical direction by the inner wall of the tank, so that the circulating water has an ideal plug flow state in the horizontal and vertical directions; the chlorine disinfectant is adopted for secondary disinfection, the concentration of the disinfectant in the tank is detected by the residual chlorine detection device at any time, and the disinfectant is added along with the residual chlorine detection device, so that the problem of poor water quality caused by secondary transportation is solved.

The invention discloses a method for continuously preparing a chiral enriched single-walled carbon nanotube by adopting a fluidized bed, and belongs to the technical field of carbon nanotubes. The method comprises the following steps: preparing a fluidized catalyst by a sol-gel method, mixing a metal catalyst salt, an inorganic sol carrier, a pore-forming template agent and an electrolyte gel to form gel, and drying and annealing to form the fluidized catalyst with the particle size of 50-200 microns and rich mesopores; the method comprises the following steps: reducing and activating a catalyst in a pretreatment reactor, introducing into a main reactor, introducing a carbon source gas and a carrier gas, and cracking and depositing a carbon source at an active center of the catalyst to grow a single-walled carbon nanotube; after the growth is finished, increasing the carrier gas flow and conveying a product to a cooling separator for collection; and after the main reactor is empty, the next batch of catalyst can be introduced without cooling to realize continuous preparation. According to the method, the catalyst metal is uniformly dispersed, the fluidization performance is excellent, the growth of multi-wall and large-diameter carbon nanotubes can be effectively inhibited, and the efficient and continuous preparation of the chiral enriched single-wall carbon nanotubes is realized.

The invention relates to the technical field of casting, in particular to a lower support vertical parting casting method which comprises a lower support and a pouring system, the pouring system is located above the lower support, an inner pouring gate is arranged at the upper end of a bottom plate of the lower support, and the pouring system comprises a pouring cup, a transverse pouring gate and a dead head. The dead heads comprise a left dead head and a right dead head, the left dead head is connected with the flow gate and is close to one side of the cross gate, the side part of the right dead head protrudes out of the side part of the left dead head, and the cross gate is connected with the left dead head and the right dead head. Through the arrangement of the pouring system and the risers in the pouring system, the flow velocity and flow state of molten metal during pouring are guaranteed, mold filling is guaranteed, and meanwhile, the static pressure of the molten metal can be increased, so that in the cooling and feeding process, the flow velocity of the molten metal is increased, the flow state of the molten metal is guaranteed, and the feeding effect of the molten metal in the risers on the lower support is guaranteed; and the problems of shrinkage porosity and the like of castings are avoided.

The invention relates to the technical field of bridges. According to an existing main arch and lattice pier structure, transverse connecting rods are arranged between main pipes so as to improve the structural rigidity, and meanwhile the stress of nodes at the two ends of each connecting rod needs to be reduced in order to meet the energy consumption and stress requirements under the earthquake action. According to the preferable scheme, concrete is poured into the transverse connecting rods, firstly, the concrete can laterally support the steel pipes, and joint stress of the steel pipes can be reduced when the concrete and the steel pipes jointly participate in stress; and secondly, compared with a steel structure, the concrete-filled steel tube structure has considerable ductility and better stability. However, the scheme needs to reduce the contribution of concrete to the axial rigidity of the section, and meanwhile, as the transverse connecting rod is wide in distribution range, a steel pump pipe or a cableway bucket needs to be used in a traditional construction scheme, the construction steps are tedious, and the progress is slow; therefore, the invention provides a concrete formula suitable for the small concrete-filled steel tube rod piece, the minimum elastic modulus is about 85% of that of common concrete, the passing time of the V-shaped funnel is less than 10 seconds, and the construction method for the concrete in the small rod piece and the corresponding construction tool are provided in combination with structural characteristics.

The invention relates to the technical field of expanded ammonium nitrate explosives, in particular to a preparation method of a high-free-flowing liquid-mixed expanded ammonium nitrate explosive, which comprises the following steps: adding porous granular ammonium nitrate accounting for 15-25% of the weight of a liquid-mixed ammonium nitrate base material into the liquid-mixed ammonium nitrate base material prepared after expanded crystallization; the preparation method of the porous granular ammonium nitrate comprises the following steps: preparing rice husk charcoal from rice husks in an inert atmosphere, dispersing the rice husk charcoal in ethanol, adding tetraethoxysilane, adjusting the pH value, and filtering, washing and drying after the reaction is completed to obtain a charcoal-silicon composite carrier; adding a nonionic surfactant and a silane coupling agent to pre-treat the ammonium nitrate feed liquid; adding a carbon-silicon composite carrier into the pretreated ammonium nitrate feed liquid, preserving heat, and uniformly stirring to obtain premixed liquid; and finally, carrying out spray drying to obtain the porous granular ammonium nitrate. The prepared expanded ammonium nitrate explosive has good free-running property and moisture absorption resistance, and is safe and reliable in explosion performance.

This invention discloses a gas-phase steady-state distribution device for flotation machines used in oilfield produced water treatment, comprising a water distribution main pipe, a slag scraper, an inclined plate, and a sludge scraper installed inside the flotation machine casing; a release device is provided at the inlet of the water distribution main pipe, and a water distribution branch pipe is connected to the water distribution main pipe, which in turn is connected to a water distribution branch pipe, which is also connected to a second release device; the outer wall of the flotation machine casing has a slag discharge port, a sludge discharge port, and a water outlet; the flotation machine inner cavity, a reflux pump, a dissolved air tank, and the first release device are connected in sequence. The beneficial effects of this invention are: improved gas-phase rising flow pattern, enhanced ability of bubbles to carry oil droplets and impurities, resulting in effluent water quality meeting design requirements, significantly improved treatment efficiency, and a substantial reduction in residence time and equipment size.

The invention discloses constant-speed gas lift equipment for scaling prevention of a high-temperature well, and relates to the technical field of gas production processes, and the constant-speed gas lift equipment comprises an anti-scaling gas lift flowing device and a constant-speed gas lift flowing device which are connected to an oil pipe in series; the anti-scale gas lift flowing device comprises a first barrel; a plurality of first gas lift gas injection channels are formed in the annular side wall of the first barrel; the first gas lift gas injection channel is inclined towards the gas-liquid flowing direction; each first gas lift gas injection channel further communicates with an anti-scaling agent channel formed in the first barrel. The constant-speed gas lift flowing device comprises a second barrel; a plurality of second gas lift gas injection channels are formed in the annular side wall of the second barrel; and the second gas lift gas injection channel is inclined towards the flowing direction of the well liquid. By adopting the scheme, the flowing direction of high-pressure gas is almost consistent with that of fluid in a shaft, and the high-pressure gas transmits kinetic energy to liquid flowing along the pipe wall at a low speed, so that liquid slippage is reduced, and the gas lifting efficiency is improved.

The invention discloses a concentrated feed production device for pregnant sows. The concentrated feed production device comprises a first elevator, a tee joint, a distributor, a batching bin, a first conveyor, a scattering device, a fermentation raw material bin, a batching scale and a mixing machine, a feeding port of the tee joint is connected with a discharging port of the first elevator, two discharging ports of the tee joint are connected with the distributor and the scattering device respectively, a discharging port of the distributor is connected with the batching bin, a discharging port of the batching bin is connected with the batching scale through the first conveyor, the scattering device is connected with the fermentation raw material bin, and the anti-arching device is arranged in the fermentation raw material bin. A discharge port of the fermentation raw material bin is connected with the batching scale through the first conveyor, and a discharge port of the batching scale is connected with the mixing machine. When the concentrated feed production device for the pregnant sows is used for producing concentrated feed products by using fermentation raw materials, block masses in the materials can be eliminated, the uniformity and the free-running property of the materials can be improved, the materials can be prevented from arching in the stock bin, and smooth production of the concentrated feed products for the pregnant sows is guaranteed.

This invention discloses a method for purifying 2,5-furandicarboxylic acid (FDCA), belonging to the field of chemical technology. The purification method includes the following steps: crude 2,5-furandicarboxylic acid is subjected to alkali dissolution, oxidation, acidification, stirring, pulping, washing, and drying to obtain pure 2,5-furandicarboxylic acid. In the acidification crystallization process and the pulping and washing process, by selecting appropriate conditions such as the acidification reaction temperature, the oxygen content of the oxidation gas, the pulping and washing temperature, and the pulping and washing time, the purity of the obtained FDCA can reach 99.99%. Moreover, no organic solvents are used, meeting the requirements of polymerization-grade products. Furthermore, and more importantly, the FDCA product obtained by this invention has excellent particle characteristics, high flowability, and high bulk density, which is highly beneficial for downstream polymerization reactions and also facilitates the packaging and transportation of the FDCA product.

The present invention relates to the technical field of ventilation duct structures, and in particular to a ventilation duct connection structure for electromechanical engineering, comprising two groups of ventilation ducts, both opposite ends of the two groups of ventilation ducts being installed with fixed flanges, and further comprising a connection mechanism and a sound-absorbing and vibration-reducing mechanism, wherein the connection mechanism is arranged on the opposite side of the two groups of fixed flanges, and is used to connect the sound-absorbing and vibration-reducing mechanism with the two groups of fixed flanges. The present invention can achieve a soft connection between the two groups of ventilation ducts through the mutual cooperation of the connection mechanism and the sound-absorbing and vibration-reducing mechanism, and through the setting of the rubber vibration-reducing component, it can show good damping characteristics and vibration-absorbing capacity when the two groups of ventilation ducts vibrate, thereby achieving the effect of sound absorption and vibration reduction, thereby avoiding affecting the sealing of the ventilation duct, and through the setting of the transverse corrugated structure and the sinusoidal connection structure in the rubber vibration-reducing component, it can further reduce the propagation of noise, thereby avoiding harm to the physical and mental health of the staff.

This invention relates to the field of building materials technology, and more specifically, to a high-fluidity, micro-expansion multi-solid waste grouting repair material and its preparation process, comprising a cementitious material system, composite solid waste admixture, aggregate, water, and water-reducing agent, characterized in that it is composed of the following components by weight: 48-60 parts of the cementitious material system, which is compounded from 42.5 ordinary Portland cement, 42.5 composite Portland cement, and 42.5R rapid-hardening sulfoaluminate cement in a ratio of (20-60)%: (20-60)%: (5-15)%; 12-20 parts of the composite solid waste admixture, including... The material is composed of lithium slag powder, metakaolin, titanium slag powder, limestone powder, and steel slag powder, with a mass ratio of (20-40)%: (10-20)%: (17-25)%: (10-18)%: (10-23)%; 18-25 parts of aggregate, including continuously graded sand (0-4.75mm) composed of spherical steel slag sand and titanium slag aggregate; 17-23 parts of water; and 0.2-0.5 parts of water-reducing agent. This invention solves the problems of insufficient early strength, high cost, large loss of fluidity, and dependence on admixtures for expansion in existing grouting repair materials.

The present invention discloses an ozone catalytic oxidation system and process for multiphase extract treatment, and relates to the technical field of environmental wastewater enhanced treatment. The system comprises an outer reaction tube and an inner reaction tube, and the outer periphery of the bottom and the middle of the inner reaction tube are respectively sleeved with a first catalytic component and a second catalytic component, and the catalyst is a copper-cerium bimetallic ceramsite catalyst. The process comprises the following steps: S1, liquid inlet; S2, turbulent catalysis; S3, reflux; S4, backwashing. The present invention can increase the disturbance of water flow by establishing a water outlet circulation, so that the inner and outer reaction tubes present a good turbulent state, and through the countercurrent contact of ozone with the multiphase extract in the inner water inlet pipe and the outer reaction tube and the mixed contact with the multiphase extract in the two-layer catalyst assembly, the contact effect of the ozone catalyst and the ozone gas is increased, and the contact time between the wastewater and the ozonated air is prolonged, thereby improving the solubility of ozone in water.

The invention relates to an improved liquid-mixed expanded ammonium nitrate explosive which comprises the following components: 91-93 parts of ammonium nitrate, 1.16-2.25 parts of engine oil, 1.75-3 parts of vaseline, 3.5-4.5 parts of wood flour, 0.12-0.15 part of an expanding agent and 5-15 parts of a functional additive, the formula improves the free-running property and bulk density of the product, meets the requirement for easy filling in blasting operation, and saves the cost; the invention further relates to a preparation method of the improved liquid mixing type expanded ammonium nitrate explosive, automatic equipment, informatization and intelligent technologies and remote automatic control operation are adopted, few-person production is realized, the product quality is stable, and the intrinsic safety is remarkably improved; the prepared improved liquid-mixed expanded ammonium nitrate explosive is applied to blasting construction in Guizhou regions, adapts to landforms and rock hardness of different regions, stabilizes the rock hardness and improves the blasting efficiency.

The invention provides a method for tinning a Kovar carrier without a soldering flux and a ring isolator, and relates to the technical field of microwave device processing. The method for tinning the Kovar carrier without the soldering flux comprises the steps that a ceramic wafer, a tinning solder piece without the soldering flux and a device to be subjected to gold removal and tinning are sequentially placed in a tinning jig, a tinning pressing block is placed above the device to be subjected to gold removal and tinning, and an assembly part to be subjected to gold removal and tinning is assembled; the assembly part to be subjected to gold removal and tinning is placed in a vacuum sintering furnace and vacuumized, and a cavity of the vacuum sintering furnace is filled with formic acid gas so that the tinning jig can be located in the formic acid atmosphere; the vacuum sintering furnace is heated to a preset temperature, so that the formic acid reacts with the interface to be tinned of the device, and the tinned solder sheet is completely molten; and the temperature in the vacuum sintering furnace is reduced, formic acid is discharged, and a gold-removed tin-coated device is obtained. The gold removing and tin coating method provided by the invention can be used for reducing the yield loss and carrying out batch production.

The invention discloses a method for preparing spherical zinc azotetrazole, which comprises the following steps: adding a base solution and zinc azotetrazole particles with a certain particle size as seed crystals into a container, stirring and adding a zinc salt solution and a sodium azotetrazole solution at a certain temperature, and reacting for a period of time to obtain the spherical zinc azotetrazole. The method does not need to introduce an additional crystal form control agent and control the pH of the solution to control crystallization. The obtained zinc azotetrazole particles are spheroidized, the free-running property and the apparent bulk density are greatly improved, and by controlling the particle size of the added seed crystal, the preparation of the large spherical zinc azotetrazole particles with the particle size range of 80-200 microns can be realized.

The utility model relates to the technical field of anti-corrosion, and discloses an orifice plate flowmeter anti-corrosion treatment device which comprises a throttling orifice ring, the inner wall of the throttling orifice ring is fixedly connected with two first motors, the driving ends of the first motors are fixedly connected with gears, the inner wall of the throttling orifice ring is connected with two racks in a sliding mode, and the two racks are fixedly connected with the inner wall of the throttling orifice ring. The outer portion of the gear is in meshed connection with the outer portion of the rack, a supporting disc is fixedly connected to the left side of the rack, a supporting column is fixedly connected to the left side of the supporting disc, a first limiting cone is fixedly connected to the left side of the supporting column, and a second limiting cone is slidably connected to the outer wall of the supporting column. The left side of the throttling hole ring is detachably connected with an anti-corrosion ring. According to the device, the anti-corrosion ring can be automatically and rapidly disassembled and assembled, replacement can be completed without professional tools, the maintenance efficiency is remarkably improved, the labor cost is reduced, the fixing reliability of the anti-corrosion ring is improved, and the service life of equipment is effectively prolonged.

The present application relates to the technical field of black and odorous water treatment, and discloses a black and odorous water treatment and restoration device, which comprises a bearing frame, an electrochemical treatment module arranged below the bearing frame, and a general control module arranged above the bearing frame; the electrochemical treatment module comprises a horizontal frame body, flexible electrode sheets, inner support plates and an adjusting function module; the horizontal frame bodies are arranged in an array on one side of the bearing frame immersed in water; each horizontal frame body is provided with an inner support plate arranged in an array below; the flexible electrode sheets are sleeved outside the inner support plates in the same group and are electrically connected to the general control module through wires; the inner support plates are driven to swing by the adjusting function module, the flexible electrode sheets are pushed and jacked outward from the inside by the inner support plates, and the flexible electrode sheets are subjected to periodic bending deformation.