16 results about "Chemical pollution" patented technology

An optical fiber grinding coated abrasive tool and a preparation method thereof. The present application discloses an optical fiber grinding coated abrasive tool and a preparation method thereof, and belongs to the field of grinding materials. The present application aims to solve the problems of PIN hole residual pollution and cleaning difficulty caused by the use of grinding fluid containing chemical additives in traditional grinding process. The abrasive tool adopts an innovative double-layer coating structure: the bottom layer is a porous elastic layer with liquid storage function, and the surface layer is a mud crack structure abrasive layer with controllable consumption. Only water or grinding oil is needed during grinding, and the surface layer can gradually fall off to form fresh grinding slurry, realizing the effective replacement of liquid grinding medium by solid abrasive tool. This technical scheme avoids chemical pollution, simplifies the operation process, and can stably obtain high-precision optical fiber end faces, especially suitable for precise grinding of MPO multi-core fiber connectors.

The application discloses a kind of adjustable imitative tree shape kneading and rolling air blowing type sea-buckthorn harvester, belong to agricultural machinery technical field.The harvester includes mobile adjustable vehicle frame, airflow generating device, tree-shaped air blowing chamber, transport collection device and power transmission system;Tree-shaped air blowing chamber can be lifted, open and close, and the inner wall is provided with food-grade buffer pad, and the internal air pipe nozzle is distributed in imitation tree shape;Airflow generating device generates pulse airflow, cooperates with air blowing cylinder rotation to form kneading and rolling cooperative fruit removal, realizes low-damage fruit drop;Transport collection device is located below air blowing chamber, efficiently collects fruit, reduces impurities mixing.The present application can be adapted to different tree age, height, crown width sea-buckthorn plant, with high harvesting efficiency, low fruit breakage rate, no chemical pollution, suitable for large-scale sea-buckthorn plantation mechanized harvesting, solve the problem of traditional harvesting mode, such as large damage, low efficiency, many impurities, poor adaptability.

This invention discloses a purely physical, sealed, ultra-long-term static sedimentation method for municipal sewage sludge and similar solid wastes, belonging to the field of solid waste resource utilization and environmental protection technology. This invention involves no chemical additives, no high-temperature incineration, and no mechanical disturbance throughout the entire process. It is suitable for various raw materials, including municipal sewage sludge, natural river and lake sediment, livestock and poultry manure sediment, and urban pipe network silt. Utilizing the natural physical laws of colloidal electrostatic agglomeration and overall gravity settling, it achieves stratified enrichment of solid waste. This invention is equipped with a pure physical water spray system to lock in odors and a slightly positive pressure unidirectional airflow structure to prevent overflow, completely eliminating chemical pollution and odor diffusion. Simultaneously, it features a fully automated, unmanned mechanical conditioning system to steadily optimize the enrichment environment, significantly improve processing efficiency, and save labor costs. The process involves a two-stage closed-loop treatment. First, it removes the core pollution source of heavy metals, which poses the greatest threat. Then, it turns the remaining organic matter into organic fertilizer. The entire process does not generate new pollution or allow pollutants to leak out. It solves the industry pain points of traditional incineration processes, such as high pollution and resource waste, as well as traditional static waste processes, such as low efficiency, narrow applicability, and residual pollution from chemical treatment. It is low-carbon, environmentally friendly, safe, stable, and can be promoted on a large scale, enabling efficient and bidirectional resource utilization of various types of sedimentary solid waste.

This invention discloses a conductive filter material and its preparation method. The conductive filter material includes a carrier, the surface of which has a conductive layer formed by conductive particles. In this invention, the conductive filter material can directly utilize its inherent properties to provide an environment conducive to electron donor and acceptor exchange by bacteria, allowing reducing and oxidizing substances to exchange electrons. This enables substances requiring electron exchange energy to undergo continuous biochemical reactions under the action of bacteria, thereby avoiding secondary chemical pollution from oxides or reducing agents required for biochemical treatment and reducing pollutant treatment costs. The conductive filter material of this invention can be applied to biochemical treatment in various scenarios, with a wide range of applications. In this invention, cable bacteria can be used as the main bacteria in the biochemical reaction. Due to the conductivity of the conductive filter material surface, cable bacteria can be cultured, multiplied, and attached to the conductive filter material surface in large quantities, increasing the number of cable bacteria and thus improving biochemical efficiency.

The present application relates to the technical field of biomass energy, and specifically discloses a preparation method of high-performance biomass briquetting fuel based on steam explosion pretreatment of rice hull and addition of pine wood. The method uses agricultural waste rice hull as the main raw material, realizes efficient removal of hemicellulose and high retention of cellulose and lignin through steam explosion pretreatment, combines particle size optimization, and verifies the natural bonding effect of free sugar on the surface of the residue through water washing, and adds pine wood as a reinforcing agent to significantly improve the comprehensive performance of the briquetting fuel. The present application solves the core problems of low mechanical strength, high water absorption and poor storage stability of existing rice hull fuel, has low process cost and no chemical pollution, is suitable for industrialization, and provides an effective path for realizing high-value utilization of agricultural waste and the carbon neutralization goal.

The present application relates to a kind of training methods for the prediction model of chemical pollution for clean room, belong to clean environment monitoring technical field, solve the problem that existing clean room pollution source or measuring point pollutant concentration prediction is not accurate.The training method includes: obtaining multiple measured data from historical measurement data, using multiple measured data to verify the constructed clean room computational fluid dynamics CFD model, obtain the verified clean room CFD model;Multiple simulation data are obtained by simulating the verified clean room CFD model, based on the preset data cleaning method, multiple simulation data are used to clean multiple measured data, obtain multiple cleaned measured data;Multiple cleaned measured data and multiple simulation data are used to train chemical pollution prediction model, obtain the trained chemical pollution prediction model.The prediction accuracy of clean room pollution source or measuring point pollutant concentration is improved.

The utility model discloses a kind of damp-proof antibacterial decorative papers, its including flow guide layer, the flow guide layer bottom is provided with bacteriostatic layer, the bacteriostatic layer bottom is provided with trapping layer, the trapping layer bottom is provided with base layer, the outer lateral wall of the flow guide layer, the bacteriostatic layer, the trapping layer and the base layer is fixedly connected with multiple water collecting strips one and water collecting strips two, this kind of damp-proof antibacterial decorative paper, asymmetric triangle flow guide strip is designed on the top of moisture-proof layer, cooperate through V-shaped flow guide groove and the water collecting channel of water collecting strip one and water collecting strip two outer lateral wall, water collecting channel flow guide drainage, realize effective flow guide drainage while increasing surface wear resistance, and further improve service life, second, bacteriostatic layer designs broken knife of hexagonal honeycomb, physical cutting biological cell membrane is opened by edge, and the opening design of hexagonal honeycomb facilitates air circulation, and the service life of pure physical bacteriostatic is longer and has no chemical pollution.

This invention provides a high-precision analytical method for lithium and its isotopes in complex environmental media. The method includes: preparing test solutions using differentiated pretreatment processes for different types of environmental samples; analyzing the lithium and other metal element content in the obtained solutions using inductively coupled plasma mass spectrometry (ICP-MS), employing a conventional analysis mode for lithium analysis and using rhodium as an online internal standard for calibration; performing lithium isotope separation and purification on the obtained solutions, including a cation exchange chromatography step, determining the optimal lithium collection range through elution curves, and obtaining purified lithium samples; and using a multi-receiver ICP-MS combined with a standard-sample cross-validation method to perform high-precision determination of the lithium isotope ratios in the purified lithium samples. This invention establishes a systematic analytical framework covering various types of environmental media such as water, soil, sediments, plants, and hair, featuring high sensitivity, good precision, and strong matrix tolerance, and can be widely applied in environmental science, geochemistry, and pollution source tracing.

The application discloses a production method of a colored silk fibroin pure cotton fabric, and comprises the following steps: selecting 80S-120S high-count cotton yarn for bobbin dyeing; performing no-sizing slitting and beam warping and large jacquard weaving; performing biological enzyme polishing treatment by using cellulase to replace mechanical singeing and control the weight loss rate to be 3-5%; adopting a silk fibroin solution to cooperate with a multi-functional group epoxy crosslinking agent to perform functional finishing, so that the silk fibroin and the cotton fiber are combined in a covalent bond, and the strong alkali mercerizing process is replaced; and finally, the fabric is subjected to tentering and setting. The application can bypass the traditional singeing and mercerizing processes, can retain the natural strength and moisture absorption of the cotton fiber, can give the fabric a warm and soft silk luster and soft and sticky hand feeling, and can be green and environment-friendly in the production process, and can significantly reduce chemical pollution and energy consumption.

The application discloses a method for laser deposition additive manufacturing of overhanging structure and a support assembly, and belongs to the technical field of additive manufacturing. The method comprises the following steps: firstly, depositing a part body below an overhanging starting surface, suspending, then fixing an oxide ceramic support body through a temporary mechanical fixing device, setting a metal sacrificial layer of the same base material system as the part body on the support body, continuing to deposit the overhanging structure, removing the fixing device after forming, and removing the sacrificial layer through mechanical processing to obtain a pure part. The support assembly comprises an oxide ceramic support body, a temporary mechanical fixing device and a metal sacrificial layer preform. The application solves the problems of difficult support removal, easy damage to the part and non-reusable support in the existing laser deposition forming of the overhanging structure, realizes self-falling of the support, non-chemical pollution and reusable support, significantly reduces the post-processing cost, and is suitable for laser deposition forming of titanium alloy, high-temperature alloy and the like.

The application discloses an energy-saving process for activating biochar by wood vinegar steam through a thermo-chemical-physical coupling method, wherein wood vinegar steam is used as an activating agent instead of water vapor, and wood vinegar liquid is recycled in the process, serving as a heat carrier and participating in a thermo-chemical reaction to release heat, so that energy is saved and emission is reduced, and the process is a green new process, energy saving over 60%, wood vinegar liquid utilization rate 100%, and no waste liquid discharged. Due to the ionization of acetic acid, a characteristic component, the process also meets the swelling action principle of acid activation, so that biochar is more easily activated, and has double effects, and is a thermo-chemical-physical coupling method. The wood vinegar liquid generated in the biochar process is used as an activating agent, so that the problems of high energy consumption of a single water vapor activation method and chemical pollution of a single phosphoric acid activation method are avoided. The process overcomes the shortcomings of traditional methods, saves energy and reduces emission, reduces production cost, and effectively realizes comprehensive utilization of wood vinegar liquid.

This invention discloses a green control method for wheat stem base rot based on microbial inoculant seed dressing, belonging to the field of green control technology for wheat diseases. The specific steps of this method are as follows: using decomposed wheat straw as raw material, a straw biochar carrier with a hierarchical pore structure is prepared through multiple processes; two types of bacteria are activated and propagated to prepare a bifunctional symbiotic bacterial suspension; signal molecules are selected and loaded onto the carrier; the bacterial suspension is then loaded onto the carrier with the signal molecules to prepare a ternary symbiotic seed dressing agent; finally, it is mixed with wheat seeds in a certain proportion, air-dried, and then sown to achieve green and efficient planting. This invention prepares a straw biochar carrier to construct a ternary symbiotic, realizing the resource utilization of agricultural waste and building a barrier for disease control; the bifunctional symbiotic bacterial community is screened for precise antibacterial action, and the targeted seed dressing and air-drying treatment avoid chemical pollution, improves the rhizosphere ecology, enhances the stress resistance of wheat, and is simple to operate and suitable for large-scale planting.

The application discloses a flexible high polymer material with self-repairing performance and a preparation method thereof. The preparation method of the flexible high polymer material with self-repairing performance comprises the following steps: (1) taking caprolactone and 1,4,8-trioxaspiro-[4,6]-9-undecanone as raw materials, and reacting under the action of a catalyst to obtain a prepolymer; (2) taking the prepolymer and a polyhydric alcohol to react, and after the reaction is completed, pouring the reaction product into a mold, and obtaining the flexible high polymer material with self-repairing performance after solidification. The flexible high polymer material with self-repairing performance has good tensile stress, high tensile strength and small contact angle, so that the service life of the material can be greatly prolonged and chemical pollution can be reduced. In addition, the flexible high polymer material with self-repairing performance has a hydrophilic surface, and can be used as a good base material to develop wearable electronic skin with excellent mechanical properties and self-repairing performance.

The method for processing a diamond-like carbon film according to the present invention includes: placing the diamond-like carbon film in a vacuum chamber, controlling the gas pressure in the vacuum chamber to be below a first gas pressure; and injecting helium gas into the vacuum chamber, controlling the injection time of the helium gas and maintaining the gas pressure in the vacuum chamber at a second gas pressure, wherein the second gas pressure is greater than the first gas pressure. This method is simple and efficient, effectively softens the diamond-like carbon film, improves the reliability of the diamond-like carbon film, and avoids chemical contamination, thus facilitating its industrial application.

FIELD: training military personnel.SUBSTANCE: invention relates to training military personnel to act in conditions of chemical contamination. When training in the operation of chemical reconnaissance and control devices that operate in the presence of a simulator, 1,2-propanediol, which has spectral characteristics of reduced ion mobility close to ammonia, is used as a simulator.EFFECT: using a non-toxic and readily available compound, 1,2-propanediol, as a simulant of the toxic chemical ammonia. This simulator can also be used to evaluate the performance of chemical reconnaissance and control devices.1 cl, 1 dwg

This invention relates to the field of two-dimensional material preparation technology, specifically to a two-dimensional material-liquid field effect method for transferring two-dimensional materials, comprising: Step 1, placing a target substrate on a two-dimensional material, wherein the two-dimensional material is grown on a growth substrate, and drying the target substrate; Step 2, cutting the target substrate to expose the interface between the target substrate and the two-dimensional material; Step 3, continuously dripping liquid into the interface between the target substrate and the two-dimensional material. This invention does not introduce chemical contamination during the transfer process; it can significantly improve the ability of two-dimensional materials to transfer to a target substrate; it can self-drive the improvement of two-dimensional material transfer capability without the need for external electric field assistance; it does not involve high-temperature annealing or other methods, has low requirements for environmental humidity and cleanliness, and is widely applicable to various two-dimensional materials; it is simple to operate and low in cost. Considering the above advantages, this invention has good application prospects in the field of two-dimensional material application technology.