57results about How to "Stable removal" patented technology

The invention discloses a constructed wetland microbial fuel cell coupling device based on a novel three-dimensional electrode, and belongs to the technical field of sewage treatment, the device comprises a shell, and a bottom layer, an anode layer, a middle layer and a cathode layer are sequentially arranged in the shell from bottom to top. Wherein the bottom layer is filled with coarse gravels, and the middle layer is filled with fine gravels; the anode layer consists of a plurality of titanium tubes which are horizontally arranged and a titanium mesh for connecting the titanium tubes in parallel; openings are formed in the two ends of the titanium tube, through holes are formed in the titanium tube in an array mode, and the titanium tube is filled with a graphite felt core formed in a curled mode. The graphite felt core body can be used for a conductive material strengthening process and can also be used as a supporting material, and compared with an anode cage structure formed by a stainless steel net, the bearing strength is higher; the resistance of the metallic titanium is lower than that of the stainless steel mesh, so that electron transmission and improvement of electron transfer efficiency are facilitated, and the energy recovery efficiency and pollutant removal efficiency of the constructed wetland microbial fuel cell coupling device can be effectively improved.

The invention discloses a frozen coal unfreezing device for truck transportation, which belongs to the technical field of coal transportation and comprises a turnover assembly, a first heating assembly, a second heating assembly, a driving assembly and a water inlet assembly. According to the invention, a plurality of working infrared heating tubes heat frozen coal in the compartment and two sides of the compartment, hot water is sprayed to one side of the interior of the compartment, the unfrozen hot water is heated by the heated compartment, and the frozen coal is unfrozen continuously by the hot water heated by the compartment; the working infrared heating pipes can heat the side face and the bottom of the carriage, and meanwhile the working infrared heating pipes heat water at the bottom of the carriage, so that the hot water at the bottom of the carriage can unfreeze frozen coal making contact with the bottom of the carriage. The first heating assembly and the second heating assembly synchronously rotating with the carriage can enhance the unfreezing effect of frozen coal in the carriage, unfreezing and unloading can be carried out at the same time, the unloading time is shortened, and the transportation cost of the frozen coal is reduced.

The invention discloses zero-valent iron shell reinforced microbial immobilized particles as well as preparation and application thereof, and belongs to the technical field of wastewater treatment. According to the preparation method, anaerobic digestion bacteria and a zero-valent iron reinforced material are embedded in porous organic gel formed by cross-linking polymerization of polyvinyl alcohol or sodium alginate in a layered manner, so that stress of an external poor water quality environment and the zero-valent iron material on microorganisms is reduced; in the prepared zero-valent iron shell reinforced microbial immobilized particle, the shell containing the zero-valent iron can protect microorganisms from being disturbed by external adverse environmental conditions, the environmental adaptability of the microorganisms is improved, and meanwhile the biological activity of the microorganisms in the porous inner core is reinforced; on the other hand, the biological toxicity of the zero-valent iron material to microorganisms is reduced, and the broad-spectrum applicability of the zero-valent iron is improved.

This invention discloses a first-shaft and second-shaft connection mechanism for a transmission and its working method, belonging to the field of transmission technology. It includes two shafts; each second shaft has a cylindrical roller bearing without an outer ring mounted on its shaft end; a first shaft has an inner bore through which the cylindrical roller bearing without an outer ring is connected; the first shaft is fixedly connected to a clutch housing via the first shaft bearing; a front end cover is provided on one side of the clutch housing; a first shaft gear is provided on the other side of the clutch housing, and the first shaft gear is sleeved outside the first shaft; a second shaft overdrive gear is loosely fitted on the outer ring of the second shaft; a gear seat is provided between the second shaft overdrive gear and the first shaft gear; a sliding sleeve is fitted on the outer ring of the gear seat. The first-shaft assembly, second-shaft assembly, and connection structure provided by this invention solve the problem of not being able to arrange a cylindrical roller bearing without an outer ring on the second shaft end when there is no radial space, thus improving the overall reliability of the transmission.

The invention provides a device and a method for continuously removing a solvent from a waterborne polyurethane emulsion. The device comprises a desolventizing tower, a cooling device and a vacuum device which are connected in sequence, a heating device is arranged outside the desolventizing tower; a plurality of tower trays are arranged in the desolventizing tower, one end of each tower tray is fixed on the inner wall of the desolventizing tower, and the other end of each tower tray is provided with an overflow weir. According to the device and the method provided by the invention, the problems of low efficiency, high vacuum degree, easiness in skinning, deslagging, bubbling, heater blockage and the like in the traditional process of removing the solvent from the waterborne polyurethane emulsion are effectively solved; the device can automatically, efficiently, quickly and continuously remove the organic solvent in the waterborne polyurethane emulsion, the water content in the removed organic solvent is low, and the water can be used for subsequent production without being separated and purified by a refining system again.

This invention belongs to the field of oil and gas field wastewater treatment technology, and discloses a treatment system and method for oil and gas field fracturing flowback fluid. The system comprises a de-gelling and flocculation system, a microbubble ozone system, a reverse osmosis interception system, and a bio-enhanced degradation system connected in sequence. The de-gelling and flocculation system receives the raw water to be treated and, through the synergistic effect of chemical de-gelling and physical swirling fields, separates and removes oily substances and suspended solids from the raw water, forming de-gelling permeate. The microbubble ozone system is used to deeply oxidize the de-gelling permeate, forming oxidation permeate. The reverse osmosis interception system is used to desalinate and deeply purify the oxidation permeate, forming reverse osmosis permeate. The bio-enhanced degradation system is used to degrade biodegradable pollutants in the reverse osmosis permeate to obtain system effluent. This invention achieves the comprehensive goal of a compact process and stable effluent that meets standards for reuse or discharge through a closed-loop treatment path of progressive pollutant reduction and differentiated purification.

The utility model discloses a winding device for producing a high-transparency scratch-resistant polyester film, and relates to the technical field of film winding, the winding device comprises a support frame, a winding material conveying assembly, a tensioning pushing assembly and a finished product collecting module, the leftmost side of the support frame is provided with the winding material conveying assembly, the winding material conveying assembly comprises a material conveying inlet, a guide roller and a brake electric brake component, and the guide roller is arranged on the support frame; the braking electric brake component is arranged above the guide roller, the tensioning and pushing assembly is arranged on one side of the guide roller and comprises a tensioning roller, a driving and pushing component, a pushing block and a pushing groove, the pushing block is connected with the driving and pushing component, the tensioning roller is rotationally connected to the supporting frame, and a static electricity eliminating component is arranged on one side of the tensioning roller. And the finished product collecting module is arranged on one side of the supporting frame. The device has the remarkable beneficial effects of improving the winding efficiency, ensuring the product quality, enhancing the operation safety and the like.

The invention discloses a banquet ceiling lamp and an installation technology, and relates to the technical field of ceiling lamps. The ceiling lamp aims to solve the problem that in a building such as a banquet hall with the high ceiling top, a worker cannot conveniently take down a ceiling lamp in a ceiling to maintain and replace the ceiling lamp. A plurality of mounting grooves are formed in the outer wall of the bottom of the ceiling body, a fixing plate is fixed to the inner wall of the top of the ceiling body, a junction box is fixed to the outer wall of the bottom of the fixing plate, the outer wall of the bottom of the junction box is connected with a first conductive ejector pin through a power transmission line, and conductive connectors are arranged on the outer walls of the two sides of the junction box respectively. A side baffle is fixed to the outer wall of one side of the ceiling body, and the inner wall of the side baffle is rotationally connected with a driving rod and a driven rod. A row of lamp bodies mounted in the ceiling body can be automatically driven to move up and down by a corresponding distance under the driving of the motor without climbing of a worker, and the lamp bodies can be conveniently replaced and maintained by the worker.

The application discloses a modular quick-release support, a variable-inclination conveyor and a use method thereof, and belongs to the technical field of conveyors. The modular quick-release support comprises a plurality of quick-release support bodies arranged on a rack. The quick-release support body comprises: a mounting plate arranged on the rack, wherein a movable groove for sliding of the mounting plate is formed in the rack; a roller part comprising a center roller assembly arranged on the mounting plate and a first roller assembly and a second roller assembly arranged on both sides of the center roller assembly respectively, wherein the first roller assembly is fixedly connected with the mounting plate; and a driving mechanism arranged on the lower side of the rack. The application is characterized in that the roller support of the loading point area of the conveyor is modularly designed, the quick-release support body can be quickly disassembled and the roller body can be replaced, the problems of the traditional roller body needing to support the belt and being difficult to replace in a narrow space, long time consumption and difficulty in replacement are solved, the difficulty in replacement of the roller body is reduced, the efficiency of replacement of the roller body is improved, and the conveying efficiency of the conveyor is improved.

The utility model discloses an anti-blocking device. The anti-blocking device comprises a gas tank and a differential pressure gauge. The gas tank comprises a tank body, a gas spraying pipe and a first switch. The gas ejector pipe is communicated with the tank body and extends into the reaction container, and an outlet of the gas ejector pipe faces a preset position. The first switch is connected with the gas ejector pipe, and the differential pressure gauge is used for detecting the differential pressure value. When the preset position in the reaction container is blocked, the differential pressure value detected by the differential pressure gauge is increased, and as the differential pressure gauge is electrically connected with the first switch, when the differential pressure value of the differential pressure gauge is greater than the preset differential pressure value, the preset position can be judged to be blocked, so that the first switch can be turned on, and the gas ejector pipe is in a closed state; the pressure of the compressed gas in the tank body is instantly converted into jet flow kinetic energy, strong impact force can be generated to impact obstructions, and blockage breaking, flow aiding and blockage prevention are achieved. Blockage removal is realized by controlling on and off of the first switch, manual blockage removal can be liberated, safety and reliability can be realized, normal and stable removal of SO2 in the desulfurizing absorption tower can be ensured, and environmental pollution is prevented.

This invention provides a mass production machining device for door pillars, belonging to the field of door pillar mass production machining technology. It includes a base, with mounting brackets mounted on the top of the base. The mounting brackets have equidistant first limiting grooves and equidistant mounting grooves on their tops. Four mounting brackets are equidistantly arranged on the base, and one mounting bracket located on one side edge of the base has equidistant first limiting blocks on its top. This invention, by setting up an auxiliary positioning mechanism and a limiting and fixing mechanism, allows the eight first sliding grooves to be quickly positioned to the machining position on the top of the base in one go, avoiding multiple alignment adjustments and improving positioning efficiency. Furthermore, the limiting and fixing mechanism further limits and fixes the transported profile body, ensuring that the profile body remains stable, does not shift, and does not shake during processing, ensuring consistent processing benchmarks.

A PK polymerization solvent recovery system comprises a dehydrating tower, a heavy component removing tower and a solvent rectifying tower, an inlet is formed in the middle of the side wall of the dehydrating tower and connected with a crude solvent source, a tower top discharge port of the dehydrating tower flows back to the top of the dehydrating tower through a dehydrating tower condenser and a dehydrating tower return tank to discharge process water, and a bottom discharge port of the dehydrating tower supplies materials to the heavy component removing tower. A tower top discharge port of the heavy component removal tower is refluxed to the top of the heavy component removal tower through a heavy component removal tower condenser and a heavy component removal tower return tank, materials are supplied to the solvent rectifying tower, a tower top discharge port of the solvent rectifying tower is refluxed to the top of the solvent rectifying tower through a solvent rectifying tower condenser and a solvent rectifying tower return tank, and light components are discharged. And a tower bottom discharge port of the solvent rectifying tower is used for discharging the solvent. The device is simple in structure and convenient to operate, the solvent N-methyl pyrrolidone in the crude solvent and the residual catalyst palladium element can be effectively recycled, and the PK production cost is effectively reduced.

The invention discloses a method for detaching a sock subjected to end sewing in a hosiery machine, which comprises the following steps: in the end sewing process, a sock receiving tube is firstly supported by a lower component, then moves to the upper part and is supported by an upper component to complete end sewing; a sock jacking pipe is arranged on the upper portion of the pushing and lifting pipe, the outer diameter of the sock jacking pipe is smaller than the inner diameter of the sock receiving pipe, and when the sock receiving pipe is located on the lower assembly and combined with the pushing and lifting pipe, the sock jacking pipe extends into the sock receiving pipe; after sewing and weaving are completed, when the sock receiving pipe is still supported by the upper assembly, the pushing and lifting pipe pushes the sock jacking pipe to move upwards again till the sock jacking pipe extends into the sock receiving pipe, and the socks wrapping the outer wall of the sock receiving pipe are jacked into the sock receiving pipe from the lower end. The action of the sock jacking pipe is added, and it can be further guaranteed that the socks with the ends sewn can be smoothly detached.

The present application relates to the field of intelligent control, and provides an adaptive control system and method for fly ash washing, which uses AI-based data processing and encoding technology to group the washing liquid status data in the washing liquid storage tank, and then maps the grouped parameter data sets to the Gram angle field and performs characteristic analysis of the time series pattern, so as to adaptively adjust the water-cement ratio based on the dynamic memory attention fusion between the time series pattern characteristics of the washing liquid pH value and the time series pattern characteristics of the washing liquid conductivity. In this way, the changes in the washing process can be understood in real time, and the water-cement ratio can be adaptively adjusted according to the state of the washing liquid after the current washing, so as to ensure that the chlorine and heavy metal removal can be maintained stably when facing fly ash with large composition fluctuations. At the same time, the need for manual adjustment is reduced, and the error is reduced.

The invention relates to the technical field of flue gas treatment, in particular to a flue gas ultra-low emission system and method based on chemical looping combustion, and the flue gas ultra-low emission system comprises an in-furnace in-situ desulfurization unit, a cyclone separator, a nitrogen oxide removal unit, a dust removal unit, an out-furnace desulfurization unit and a recirculation unit which are connected in sequence in the flue gas flowing direction; wherein the nitrogen oxide removal unit is arranged in a flue between the cyclone separator and the dust removal unit; and part of recycled flue gas treated by the dust removal unit and / or the recycling unit is at least used for diluting or atomizing a denitration reducing agent in the nitrogen oxide removal unit, and / or returns to a chemical looping coal feeding system. According to the invention, through creative connection relations and medium circulation paths among the units, the beneficial effects of ensuring carbon capture advantages, efficiently purifying special pollutants, realizing internal circulation integration of the system, having good economy and the like are generated.

The application provides a plate-shaped object carrying device and a use method thereof, and relates to the technical field of material transportation equipment. The device comprises a bearing base, a walking mechanism arranged at the bottom of the bearing base, a lower positioning seat arranged on the bearing base, the lower positioning seat having a containing space for containing the bottom of a plate-shaped component, a lower clamping assembly arranged on the lower positioning seat, a rotatable lifting support arm, the lower end of which is rotatably connected to one side of the lower positioning seat or the bearing base, the length of the rotatable lifting support arm being adjustable, a transversely extending arm connected to the upper end of the rotatable lifting support arm, and an upper clamping assembly arranged on the transversely extending arm. The application has the beneficial effect of effectively eliminating structural interference during loading and unloading, enabling smooth vertical placement or removal of plate-shaped objects, and greatly reducing the operation difficulty. The structure is compact and reasonable, and is particularly suitable for material transfer operations in a space-limited construction site or a narrow passage.

The invention discloses a hydrogen production method for treating etching solution wastewater by using a photo-assisted single-chamber microbial electrolytic cell, and relates to the technical field of microbial electrochemistry and photocatalysis, and the hydrogen production method comprises the following steps: S1, mixing an anolyte of a stably operated double-chamber microbial fuel cell with etching solution tail end wastewater, adding the mixture into a reactor, and regularly replacing the solution until the anode potential is stable; s2, domesticating two ends of the electrode by using a direct-current power supply and external voltage until the potential of the cathode is reduced, and completing the domestication of the anode; and S3, the photocathode adopts a photocatalytic material, and organic matters are mineralized and nickel ions are removed while hydrogen is produced under an external voltage condition. The photo-assisted microbial electrolytic tank integrates the advantages of water electrolysis hydrogen production, photocatalytic hydrogen production and microbial electrolytic tank hydrogen production, overcomes the defect that a photocatalyst for photocatalytic hydrogen production is unstable, reduces the energy consumption required by microbial electrolytic tank hydrogen production, and recovers heavy metal mineralized refractory organics in etching liquid tail end wastewater. The method is a clean, efficient and low-consumption mode for treating wastewater and simultaneously producing hydrogen.

The utility model relates to the technical field of stirring, in particular to a flour stirring rod structural part easy to clean. The dough stirring rod structural part easy to clean comprises a main shaft and a dough stirring assembly arranged at one end of the main shaft, wherein the flour stirring assembly comprises an end part I, an end part II and a plurality of stirring cutters, the end part I and the end part II are arranged in a mutually separated manner and are respectively arranged on the outer side of one end of the main shaft in a sleeving manner, and the plurality of stirring cutters are arranged between the end part I and the end part II in a surrounding manner along the circumferential direction of the main shaft. The stirring knife has the advantages that the first stirring rod, the second stirring rod and the third stirring rod are unfolded to form a stirring rod in a regular vertical line, the stirring knife is easier to process during cleaning, the cleaning efficiency is improved, workers can clean each part more thoroughly due to the fact that the stirring knife is unfolded to form a regular straight line, and the working efficiency is improved. Meanwhile, the cleaning complexity is also reduced, and the labor burden of workers is relieved.

The invention belongs to the technical field of stripping liquid, and particularly relates to photoresist stripping liquid as well as a preparation method and a use method thereof. The photoresist stripping liquid comprises the following raw materials in percentage by mass: 90%-99% of an aprotic polar solvent, 0.5%-5% of organic alcohol amine, 0.1%-3% of an inhibition protective agent and the balance of a pH (Potential of Hydrogen) regulator, the photoresist stripping liquid provided by the invention can effectively and stably remove the photoresist and maintain relatively high stripping capacity and efficiency under mild chemical conditions, and also can avoid corrosion or damage to IM layer materials such as niobium oxide and the like, so that the integrity and reliability of a multi-layer structure device are guaranteed.

This invention discloses a welding positioning device and its forming method for training missiles. The welding positioning device includes: a missile body welding fixture, a pouring fixture, a tail fin welding fixture, and two centers. Each of the two centers consists of a frustum and a round rod coaxially fixed to the large-diameter end of the frustum. The two centers are respectively used to hold the inner hole of the missile body's central tube and the positioning sleeve. The missile body welding fixture is used to weld and position the missile head and cylindrical section, and the missile head and mounting sleeve. The pouring fixture is used for pouring and forming concrete inside the conical section of the missile body. The tail fin welding fixture is used to weld and position the tail fin and the conical section, and to ensure the relative angle between the tail fin blades and the positional relationship between the blades and the missile body axis. This invention can ensure the welding quality and welding accuracy of the training missile, thereby ensuring coaxiality, symmetry, and straightness.

The utility model discloses a thermal printer, which belongs to the technical field of thermal printers, and comprises a base, a thermal paper discharge tray, a printer main body and a mounting rack, the surface of the base is provided with the thermal paper discharge tray, one side of the surface of the base is provided with the printer main body, and the printer main body is provided with the mounting rack. Mounting frames are installed on the surface of the base and located between the printer body and the thermo-sensitive paper discharging disc, guide rollers are symmetrically installed between the mounting frames, an adjusting mechanism for adjusting the distance between the guide rollers is installed in the mounting frames, and the adjusting mechanism comprises a two-way lead screw, a moving end and a rotating end. Through the arrangement of the guide rollers and the adjusting mechanism, the distance between the two sets of guide rollers can be flexibly controlled, the guide rollers assist the thermo-sensitive paper to enter the printer in the posture parallel to the input port of the printer, friction between the thermo-sensitive paper and the input port of the printer is avoided, and the stability of the whole printer in use is guaranteed.

The present invention discloses a high entropy alloy nanoparticle and its application and preparation method, which belongs to the technical field of removing mature biofilm. The raw materials of the high entropy alloy nanoparticle include metal powders Fe, Ni, Mn, Nb, Cu and Ag; wherein the molar ratio of Fe, Ni and Mn is 1:1:1; the molar ratio of Nb to Fe is x, the molar ratio of Cu to Fe is y, the molar ratio of Ag to Fe is z, 1.0≤x≤12.0, 0.5≤y≤1.5, 0.05≤z≤0.25. The high entropy alloy nanoparticles of the present invention further enhance the effect of removing biofilm by regulating the composition, and the high entropy alloy nanoparticles have excellent photothermal conversion ability under sunlight irradiation, so that the biofilm removal performance is more excellent, and a very small amount of high entropy alloy nanoparticles can achieve efficient, long-term and stable removal of biofilm.

The utility model relates to a clamping nozzle assembly and a vascular clamp. The clamping nozzle assembly comprises a base part and two support arms. Each support arm is provided with a setting groove. The setting groove is provided with a first side wall surface, a second side wall surface, a first inclined bottom surface, a second inclined bottom surface and a groove bottom surface. The first side wall surface and the second side wall surface are arranged at an interval. One side of the first inclined bottom surface is connected to the first side wall surface, and the other side of the first inclined bottom surface extends towards the second side wall surface; one side of the second inclined bottom surface is connected to the second side wall surface, and the other side extends towards the first side wall surface. The two sides of the groove bottom face are connected to the first inclined bottom face and the second inclined bottom face respectively. The first inclined bottom surface and the second inclined bottom surface are inclined relative to the height direction of the arrangement groove. Due to the fact that the first inclined bottom face and the second inclined bottom face are arranged in the arrangement groove, when the supporting arm moves, the position of the supporting foot of the vascular clamp in the height direction can be kept not deviated.

A recombinant virus containing a degron, a preparation method therefor, and an application thereof. At least one viral protein of the recombinant virus containing the degron contains at least one degron capable of being recognized by a protein degradation system of a host cell, wherein the degron comprises any one of or a combination of at least two of an amino acid sequence, a polypeptide, or a structural motif. Further provided are a nucleic acid molecule, a recombinant vector, a preparation method for the recombinant virus containing the degron, a preparation system for the recombinant virus containing the degron, a vaccine, an oncolytic virus, and a drug. The recombinant virus containing the degron can be recognized and degraded by the protein degradation system in the host cell, the replication capability is weakened or even removed, and after a corresponding vaccine, oncolytic virus or drug is prepared, a good effect and practical application value are achieved.

The invention relates to an efficient purification method of a flue gas desulfurization amine liquid, which comprises the following steps: adding a composite purifying agent into a regeneration lean agent to be purified, simultaneously continuously introducing nitrogen for steam stripping, and after the composite purifying agent is completely added, continuously introducing nitrogen for steam stripping for at least 3 minutes; and after steam stripping is finished, cooling the obtained mixed solution to 20-45 DEG C, standing, layering and separating to obtain a free amine solution on the upper layer and a saline solution containing sulfate radicals and degradation products on the lower layer. According to the purification method, a steam stripping coupling salting-out mode is utilized, organic amine degradation products and sulfate radicals can be synchronously and efficiently removed, the removal rate of one-time purification is high, and the device is easy and convenient to operate, low in energy consumption, small in amine loss and small in amine-containing wastewater discharge and meets the new requirement for clean production of the dual-carbon target.

This invention relates to a substrate cleaning system and a substrate cleaning method. The substrate cleaning system (50) includes a heater (51), a chemical dilution module (52), and a cleaning module. The temperature of the diluted chemical solution mixed by the chemical dilution module (52) is determined to be higher than room temperature and lower than the glass transition temperature of the cleaning component. While the diluted chemical solution at the determined temperature is supplied to the substrate (W), the cleaning component scrubs the substrate (W).

This invention relates to the field of precision machining technology for semiconductor materials, and in particular to a chemical mechanical polishing (CMP) slurry, its preparation method, and its application. The CMP slurry comprises the following components by mass percentage: 6-12% composite abrasive, 3-7% composite oxidant, 2-5% complexing agent, 0.5-2% phosphine detoxifier, 0.3-1.5% dispersant stabilizer, 0.1-1% pH adjuster, and water as the balance. The composite abrasive is a composite material of alumina and silicon dioxide. The composite oxidant includes sodium hypochlorite solution and hydrogen peroxide solution. This invention, through the rational proportioning and synergistic effect of the composite abrasive, composite oxidant, complexing agent, phosphine detoxifier, dispersant stabilizer, and pH adjuster, is not only suitable for single substrates but also compatible with the CMP polishing of three typical third-generation semiconductor materials: indium phosphide, gallium arsenide, and germanium. It exhibits good versatility and process adaptability, helping to reduce production costs and process changeover complexity.

The invention belongs to the technical field of nuclear power reactor pressure vessel tools, and provides an embedded metal sealing ring dismantling device and method.The dismantling device comprises a tray, a plurality of stress pieces and an ejector rod; the multiple stress pieces are arranged at equal intervals in the circumferential direction of the tray. The side, facing the groove of the CRDM pipe base, of each stress piece is provided with an extending part, and each extending part is provided with a barb part protruding towards one side in the groove. When the embedded metal sealing ring is dismounted, the barb part of each stress piece corresponds to the part, protruding out of the groove, of the embedded metal sealing ring; the ejector rod is rotatably arranged in the center of the tray in a penetrating mode, and the tray can be driven to move in the axial direction by rotating the ejector rod. According to the method, the difficulty in dismantling the conical sealing ring embedded in the CRDM tube socket can be solved, the dismantling quality of the conical sealing ring embedded in the CRDM tube socket of the EPR type nuclear power reactor pressure vessel top cover can be guaranteed, and technical support is provided for safe operation of nuclear power.

The application provides an engineered probiotic with intracellular chimeric nanoscale enzyme, which is a probiotic modified with several antioxidant enzymes on an inner membrane; the antioxidant enzyme is composed of a metal oxide nanoscale enzyme with a particle size less than 10 nm and a targeting molecular structure and a saccharide molecular structure modified on the surface of the metal oxide nanoscale enzyme; the targeting molecular structure and the saccharide molecular structure are connected to the surface of the metal oxide nanoscale enzyme through a connecting group containing a metal ligand structure based on coordination and electrostatic interaction, and the antioxidant enzyme accounts for 5-20% of the mass of the engineered probiotic. The application also provides a method for preparing the engineered probiotic and application of the engineered probiotic in preparation of a medicine or food for preventing or treating antibiotic-associated diarrhea. The engineered probiotic can realize efficient elimination of hydroxyl radicals near a membrane induced by an antibiotic, so as to accurately inhibit a lipid peroxidation reaction and protect the integrity of a cell membrane.