456 results about "Fine particulate" patented technology

The invention provides a sand and dust scene atmosphere pollution source identification method and system, computer equipment and a medium, and belongs to the field of environmental pollution analys.The method comprises the steps that the types of volatile organic compounds and the types of fine particulate matter PM2.5 in the atmosphere of a sand and dust scene to be identified in a target area are identified, and the concentration of the volatile organic compounds and the concentration of the fine particulate matter PM2.5 are measured; carrying out mineral dust proportion calculation on the types of the fine particulate matters PM2.5 and the concentration of the fine particulate matters PM2.5 to obtain a mineral dust quantification result, and determining a dust source contribution weight according to the active metal increment in the mineral dust quantification result; and performing positive matrix decomposition prediction on the types of the volatile organic compounds, the concentration of the volatile organic compounds, the types of the fine particulate matters PM2.5 and the concentration of the fine particulate matters PM2.5 based on the dust source contribution weight, and determining the pollution source contribution proportion of the atmosphere of the sand and dust scene to be identified. According to the method, the accuracy of pollution source identification is guaranteed, and a basic guarantee is provided for subsequent pollution source treatment.

The invention relates to a regional pollutant concentration prediction method and device and a storage medium, and is applied to the technical field of pollution monitoring. The method specifically comprises the following steps: acquiring historical pollutant concentration monitoring data and meteorological data of each single site, and predicting future fine particulate matter concentration and pollutant chemical components of the single site based on an EnvMulti-KAN model fused by KAN and Transform architectures; according to the prediction result of each single station in the target area, particle diffusion and convergence are simulated by adopting a multi-station fine particle diffusion model in combination with geographic information and interaction among the single stations, the pollutant area concentration is constructed, the area fine particle concentration is accurately predicted, and the view limitation of the single station is broken; according to the method, the single-site model and the multi-site model are cooperated, the concentration of the regional fine particulate matter is accurately predicted, the main components of the pollutants are synchronously and accurately predicted, and a demonstration is provided for atmospheric chemistry theoretical research.

The invention provides an atmospheric fine particulate matter and ozone optimization control method, and relates to the technical field of environmental control, and the method comprises the steps: collecting the mass concentration of PM2.5 and O3 of a target city, an emission reduction policy and precursor emission data of each pollution source; dividing the target city into a VOCs control area and a VOCs and NOx cooperative control area according to the ozone sensitivity; based on an EKMA curve, obtaining an optimal emission reduction proportion of a precursor of each control region; calculating the control potential of different pollution sources VOCs and NOx of the target city, and establishing an O3 concentration optimization control constraint equation set; calculating PM2.5 sensitivities of different areas of the target city to the receptor points, dividing the target city into a plurality of grade sensitive areas, and establishing a PM2.5 optimization control constraint equation set; and solving the equation set to obtain an O3 and PM2.5 optimization emission reduction scheme. According to the invention, a refined PM2.5 and O3 pollution emission reduction scheme is provided from the city scale.

The invention provides an atmospheric fine particulate matter PM2.5 influence factor analysis method and device, and belongs to the technical field of data processing, and the method comprises the steps: obtaining multi-source heterogeneous data of a target region in a target time period, the multi-source heterogeneous data comprising spatial distribution data of atmospheric fine particulate matter PM2.5 concentration, natural environment data and social economic activity data; preprocessing the multi-source heterogeneous data to obtain grid data with a preset temporal-spatial resolution, the grid data including grid data of PM2.5 concentration and grid data of each influence factor of PM2.5; and inputting the grid data of the PM2.5 concentration and the grid data of each influence factor into a pre-trained influence factor analysis model to obtain a spatial distribution pattern of each influence factor output by the influence factor analysis model. According to the method, the nonlinear-dynamic effect of multiple factors can be fully considered, each influence factor is quantitatively analyzed, and the precision of PM2.5 influence factor analysis is improved.

The invention relates to the technical field of metro platform screen doors, in particular to a novel particulate matter-preventing energy-saving metro platform screen door with an adjustable tuyere, which comprises a metro platform, and a plurality of left-side perforated platform screen doors and right-side perforated platform screen doors are fixedly mounted on two sides of the metro platform respectively; a rotating mechanism is movably connected to one side of each shielding door with holes in the left side and one side of each shielding door with holes in the right side, an automatic control system is fixedly connected to one side of one shielding door with holes in the left side, and a left tunnel and a right tunnel are correspondingly arranged on one side of each shielding door with holes in the left side and one side of each shielding door with holes in the right side. The automatic control system adjusts the angle of the rotary baffle and closes the holes in the shielding doors on the two sides through a control circuit, on one hand, the filter screen can filter out coarse particles, on the other hand, the shielding doors can block fine particles such as PM2.5, and therefore dispersion of the particles in the tunnel into the platform is reduced, and in summer, due to the fact that the holes of the shielding doors are closed, the shielding doors can not be blocked. The loss of cold air in the platform into the tunnel is reduced, and energy is saved.

The invention discloses a Roots blower with a filtering structure, and particularly relates to the technical field of Roots blowers, the Roots blower comprises a base, a main motor is fixedly mounted at the upper end of the base, a Roots blower body is fixedly mounted at the upper end of the base, and vibration separation assemblies are jointly arranged at the front part and the lower end of the inner surface of a shell; and a wet-type filtering assembly is arranged at the rear part of the inner surface of the shell. According to the Roots blower with the filtering structure, by arranging the liquid film mechanism, the cloth bag device and the plugging mechanism, air can be filtered in a dry-wet combined mode, so that large-particle or small-particle dust and impurities in the air can be effectively removed, the filtering capacity and effect are improved, and the service life of the Roots blower is prolonged. The formed liquid film can efficiently capture dust in the air, the gas-liquid contact area is increased, so that dust particles are more easily in contact with the liquid film and are captured, and the capture efficiency of fine particulate matters including tiny dust particles can be remarkably improved.

The utility model relates to the technical field of dust treatment equipment, and discloses a dust removal equipment based on iron ore dressing processing, including: a base plate, a support column No. 1 is fixedly connected to the right side of the upper surface of the base plate; a dust removal mechanism, and the dust removal mechanism is arranged above the base plate. The utility model sets a primary treatment box, a filter screen, an air valve, an air guide pipe and a secondary treatment box. When the fan is running, the fan will extract dust-containing gas from the outside through the air inlet and allow these gases to enter the interior of the primary treatment box through the air outlet. When the dust-containing gas passes through the filter screen, the coarse dust particles in the gas will be blocked by the filter screen on the right side of the primary treatment box and fall into the dust storage box. When the gas enters the interior of the secondary treatment box through the air guide pipe, the fine dust particles in the gas will mix with water to form a suspension, which enhances the overall treatment effect of the base plate on fine particle pollutants and improves the overall dust removal effect of the base plate.

The invention relates to a fine particulate matter and ozone regulation and control method and system, a storage medium and electronic equipment. The fine particulate matter and ozone regulation and control method comprises the steps that precursor data, maximum emission reduction potential and emission reduction policies of different emission reduction regions and ozone concentration data and fine particulate matter concentration of a receptor region are collected; non-linear responses between the precursors of different emission reduction areas and the ozone concentration of the acceptor area are confirmed; non-linear responses between the precursors of different emission reduction areas and the fine particulate matter concentration of the acceptor area are confirmed; determining the minimum emission reduction of the precursors in different emission reduction areas; confirming constraint conditions of precursors of different emission reduction regions; confirming target constraints of fine particulate matter concentration and ozone concentration in different receptor regions; and calculating the emission reduction proportions of the precursors of all the emission reduction areas. According to the method, the optimal emission reduction scheme of the precursor of the emission reduction area is solved by introducing the joint response relation between PM2.5 and O3 and the precursor thereof and different constraint conditions of different emission reduction cities.

The invention discloses an oil sludge modifying and flooding agent as well as a preparation method and application thereof. The oil sludge modifying and flooding agent comprises the following components in parts by mass: 1-5 parts of oil sludge, 1-5 parts of a sulfonating agent, 0.1-5 parts of an alkali neutralizer and 0.01-3 parts of a surfactant. The oil sludge profile control and displacement agent provided by the invention can obtain good profile control and oil washing effects through the synergistic compounding effect of all the components. On the basis, the sulfonating agent is used for sulfonating crude oil rich in aromatic compounds in the oil sludge, part of the oil sludge is converted into mahogany petroleum sulfonate through alkali neutralization, and after the sulfonating agent is compounded with the surfactant, the oil washing effect of the oil sludge is activated, and meanwhile, fine particles of the oil sludge and residues of sulfonation reaction have certain plugging and profile control effects. Compared with the prior art, the oil sludge profile control and displacement agent provided by the invention can effectively reduce the oil-water interfacial tension on the premise of similar profile control performance; and under the conditions of the same usage amount and the same oil reservoir, the crude oil recovery rate can be increased by 5%.

A method of sealing a lost circulation zone may include: circulating a lost circulation treatment composition to a subterranean formation comprising a lost circulation zone, wherein the lost circulation treatment composition comprises: a carrier fluid; a polymeric additive; a fine particulate component; and a composite particulate component containing size and shape selected materials; wherein the cost circulation treatment composition has the property of allowing full volume passage through a 15,000 micron fracture width; flowing the lost circulation treatment composition into the lost circulation zone; and plugging the lost circulation zone using the lost circulation treatment composition.

The invention discloses a solid-liquid separation method for low-odor water-soaked manure, which specifically comprises the following steps: acting on water-soaked manure with the water content of 80-99.9% by adopting an electrode plate with conductive and filtering effects, enabling charged large particles in the water-soaked manure to do directional movement towards one side under the action of an electric field, filtering and recovering a liquid phase through the electrode plate, and recycling the liquid phase through the electrode plate. Therefore, fine particulate matters with the particle size of more than 0.1 mu m in the blistered manure are efficiently separated in a low-odor manner; according to the method and the device disclosed by the invention, the fine particulate matters in the blister dung can be efficiently separated, the odor emission content in the treatment process is low, the content of separated liquid-phase pollutants is also greatly reduced, and the removal rates of COD, TP, ammonia nitrogen and turbidity are 75%, 80%, 20% and 90% or above.

The utility model relates to the technical field of underground coal mine sedimentation tank dredging equipment, in particular to a comprehensive dredging device for an underground coal mine sedimentation tank and the underground coal mine sedimentation tank. The automatic dredging device for the underground settling pond of the coal mine comprises a transfer belt conveyor, a centrifugal machine, a mud scraper, a submersible mud pump and a mud pond. The solid phase separated by the centrifugal machine is discharged to the transfer belt conveyor and is output outwards through the transfer belt conveyor; the mud scraper comprises a tank body, a scraper assembly and an inclined plate sedimentation assembly, the tank body is provided with a feed port and a mud outlet, the scraper assembly and the inclined plate sedimentation assembly are arranged in the tank body, and the scraper assembly is used for scraping sediments in the tank body to the mud outlet; the mud pool is communicated with the mud outlet, and the submersible mud pump is arranged in the mud pool and conveys sediment in the mud pool into the centrifugal machine. The inclined plate sedimentation assembly can improve the sedimentation rate of fine particles in ore pulp. The mud scraper, the centrifugal machine, the mud pool, the submersible mud pump and the transfer belt conveyor are matched, and automatic sediment treatment can be achieved.

The invention provides a method for estimating atmospheric heavy metal environmental capacity. The method comprises the following steps: acquiring basic topographic and meteorological data of a to-be-estimated target area; determining an atmospheric heavy metal emission scheme; obtaining the day-by-day grid-by-grid heavy metal concentration of the target area in the simulation year by adopting an air quality model; and calculating to obtain a non-carcinogenic risk quotient value and a carcinogenic risk quotient value, comparing with 1 to judge whether an atmospheric heavy metal emission scheme needs to be adjusted, and obtaining the atmospheric heavy metal environmental capacity of the emission source arrangement position until the non-carcinogenic risk quotient value or the carcinogenic risk quotient value is less than 1. According to the method, pollutant types are expanded from fine particulate matters and precursors thereof to atmospheric heavy metals, constraint based on pollutant concentration is promoted to constraint of crowd health, and a reasonable environmental capacity result is obtained by utilizing iterative calculation. According to the invention, the goal of atmospheric environmental pollution prevention and control work is improved from improvement of air quality to reduction of crowd health risks, and technical support is provided for cooperative emission reduction work of various pollutants.

The present application provides a dust removal device, and relates to the technical field of dust removal devices. A dust removal device comprises a shell, the side wall of the shell is provided with an air inlet, and the two ends of the shell are respectively provided with an air outlet and a dust outlet. A dust collecting pipe and a static pressure box are provided inside the shell, and one end of the dust collecting pipe is arranged at the dust outlet. The end with a large diameter of the static pressure box is connected to the end of the shell close to the air outlet, and the end with a small diameter of the static pressure box is provided with an air inlet pipe, and the end of the air inlet pipe away from the static pressure box extends into the dust collecting pipe. A conical pipe is provided between the static pressure box and the dust collecting pipe, the closed end of the conical pipe is connected to the end with a small diameter of the static pressure box, and the expanded end of the conical pipe extends in the direction close to the dust collecting pipe. The dust removal device increases the dust removal path of the gas without increasing the volume of the dust removal device, so that the gas and the particulate matter are fully separated, and after the large particulate matter is separated out, the fine particulate matter is separated, thereby improving the dust removal efficiency and the dust removal effect.

The invention discloses an atmospheric microparticulate monitoring device and method based on multi-mode sensing, and relates to the technical field of ecological environment monitoring. The device comprises a data acquisition system used for carrying out real-time sample acquisition and signal conversion on conventional pollution factors and meteorological parameters in air; the data analysis system is used for carrying out concentration analysis and early warning on the signals converted by the data acquisition system; the error evaluation system is used for performing error evaluation on the key indexes of the data acquisition system according to the acquired samples; and the data transmission system is used for carrying out cross-regional transmission on the sample acquired by the data acquisition system and the analysis result according to a sensitivity quantity algorithm based on an anonymous model. Real-time monitoring of atmospheric micro-particles with high accuracy and strong applicability is realized based on atmospheric monitoring standards independent of a meteorological monitoring framework, and reasonable adjustment of device parameters is realized by cooperation of the atomic fluorescence spectrometer and the enrichment sampling and pretreatment unit.

The utility model discloses PCB micro-etching liquid cyclic regeneration equipment which comprises a main box body, the upper part of the main box body is fixedly connected with a shower box body, the right side of the main box body is fixedly connected with a lengthened box body, the front side of the shower box body is connected with a first filtering drawer through a bolt, and the front side of the lengthened box body is connected with a second filtering drawer through a bolt. An evaporative crystallization metal plate is rotatably connected to the interior of the main box body through a hollow rotating shaft, the hollow rotating shaft penetrates through the interior of the evaporative crystallization metal plate and is welded to the evaporative crystallization metal plate, and a heating rod is fixedly connected to the interior of the hollow rotating shaft. According to the device, valuable metal components in the micro-etching liquid are effectively separated and recycled by adopting the evaporative crystallization metal plate and the heating rod, so that the consumption of raw materials is reduced, the resource utilization rate is improved, and meanwhile, the environmental pollution is also reduced. By arranging the second filtering drawer, fine particle impurities are further removed in the micro-etching liquid cyclic regeneration process, it is ensured that the regenerated micro-etching liquid reaches the use standard, and the PCB machining quality and efficiency are improved.

The application discloses a flue gas purification device and method for thermal power plants, which comprises a combined installation cylinder, one end of the combined installation cylinder is provided with a positioning installation sleeve, and the other end of the combined installation cylinder is provided with a positioning installation cylinder, further comprising: a threshold capture leading-out mechanism and a sequential processing mechanism matched with the threshold capture leading-out mechanism, which can be quickly combined and installed according to different purification requirements, realize multi-level purification operation, and have transportation convenience and maintainability; can synchronously realize liquefaction promotion of fine particulate matter capture effect, and automatically periodically clean and process captured substances through a threshold mechanism, while cooperating with passive centrifugal oscillation demolding, so that the substance capture capacity of the device is stably maintained for a long time, so as to improve the efficiency and service life of the device; can improve the particle adsorption effect through the heat absorbed by condensation, and optimize the acid-base washing structure, further improve the purification level of the device.

The invention provides a regional purification quality evaluation method and device of an air purification unit. According to the method, target area division information and concentration data of pollutants such as fine particulate matters, carbon dioxide and volatile organic compounds are acquired, multi-pollutant concentration fusion analysis is performed based on a preset air quality standard, and a fusion concentration index reflecting spatial distribution characteristics is generated. And extracting the pollution accumulation rate of each partition according to the time change trend of the index, identifying the pollution propagation direction between adjacent partitions, and generating a regional purification quality evaluation result by cooperatively associating the two. And further combining the partition purification urgency degree and the pollution diffusion intensity in the evaluation result to formulate a regional collaborative operation strategy, and dynamically adjusting the air speed gear and the operation parameter configuration of the air purification unit corresponding to each partition. According to the technical scheme provided by the invention, the efficiency and precision of regional purification quality evaluation can be improved.

A device for detecting the thawing temperature of fine particle materials in real time comprises a probe rod, a gear and rack transmission system, a motor, a friction type torsion coupler, an anti-explosion guiding device, a temperature sensor and an encoder and is integrally installed on a roof of a thawing warehouse. The feeler lever can penetrate through the roof of the unfreezing warehouse to enter the unfreezing warehouse, the motor is in transmission connection with the friction type torsion coupler, the friction type torsion coupler is connected with the feeler lever through the gear rack transmission system, the temperature sensor is installed at the bottom of the feeler lever, and the encoder is installed on the friction type torsion coupler. And the probe rod moves up and down along the anti-explosion guide device. The device can detect and feed back the material unfreezing condition in real time; energy waste is reduced to the maximum extent, and carbon emission is reduced; warehousing operation of operators is avoided, and the safety risk is reduced; the unfreezing time is shortened, and the damage to railway bureau railway wagons caused by gas heating is reduced.

The present invention relates to the technical field of river and lake sediment treatment, and discloses a spiral propulsion type underwater elution robot for river and lake sediment, including a spiral propulsion power system for precise steering and movement in underwater soft foundation silt. The spiral propeller has the advantages of strong terrain adaptability, large traveling driving force, precise direction control, etc.; the sediment elution robot can achieve the suction separation of fine particulate matter and the in-situ covering of large inorganic sediment particles on the bottom of rivers and lakes through gravity separation in the sediment elution chamber and regulation of the water outlet flow rate, improving the sufficiency of sediment particle coverage at the mud-water interface. Using the underwater elution robot to carry out river and lake sediment treatment has the advantages of less sludge generation, high pollutant separation rate, low treatment cost, etc. After dehydration, the eluted silt can be used for the ecological resource utilization of sediment. The present invention is applicable to the in-situ treatment of sediment in urban rivers, lakes and reservoirs and the restoration of submerged plant habitats.

The invention discloses a driver position ultra-clean individual respiratory protection fresh air system and a control method. The system comprises a comprehensive filtering device, an air supply device, an automatic ash removal device, an emergency safety device and a main control box. The comprehensive filter device comprises a coarse filter screen, activated carbon filter cotton and a fine filter cartridge; the air supply device comprises a turbocharging fan, a refrigeration mechanism and an exhaust mechanism; the automatic ash removal device comprises an air storage tank, a pulse valve and a spray pipe; the emergency safety device comprises an air suction mechanism, a clean air control valve, an air suction port connecting pipe, a three-way connecting valve, a protective mask, a flow guide pipe, an air suction switching control valve and an air guide pipe. The filter can effectively filter fine particles and harmful gas in the severe open operation environment, and is particularly suitable for being installed on coal mine digging and transporting equipment such as a heading machine, a mine underground loader and a mine scraper loader applied to the coal mine underground severe open operation environment so as to guarantee the health and safety of a driver to the maximum extent.

The clamping type mechanical arm capable of preventing particulate matter pollution comprises a finger piece, a telescopic device, a palm box and a double-push-rod assembly, the finger piece is connected to the front end of the palm box, a first limiting part is arranged at the fingertip of the finger piece, stroke openings are formed in the side walls of the two sides of the palm box, and a second limiting part is arranged at the tail end of the palm box. The telescopic device is arranged in the palm box, and the linkage end of the double-push-rod assembly is arranged in the palm box and connected with the telescopic end of the telescopic device, so that the double-push-rod assembly is limited by the stroke distance of the stroke opening to conduct telescopic displacement, and the clamping distance between the clamping end of the double-push-rod assembly and the first limiting part of the finger piece is adjusted. Therefore, fine particles in the manipulator are prevented from overflowing to pollute wafers.

The utility model provides a fresh water aquaculture particulate matter rapid removal system which comprises a multi-stage separator, a microfilter, an ozone air floatation system, a foam separator and a remote control terminal which are connected in sequence, and the multi-stage separator, the microfilter, the ozone air floatation system and the foam separator are all connected with the remote control terminal. Breeding tail water in the breeding pond is sequentially purified stage by stage through a multi-stage separator, a microfilter, a steam-water mixing tank and a foam separator, and then is conveyed to the ecological pond for up-to-standard discharge; wherein the multi-stage separator is provided with a vertical flow precipitator and a rotational flow precipitator which are connected in sequence, and the microstrainer is connected with the steam-water mixing tank through an ultraviolet sterilization pipe; the ozone air flotation system comprises an air compressor, an air dryer, an ozone generator and a steam-water mixing tank which are connected in sequence; the steam-water mixing tank is connected between the micro-filter and the foam separator. The problem that fine particles in freshwater aquaculture are difficult to remove through air flotation is solved, and meanwhile, the occupied area is small.

The invention discloses a multi-stage filtering structure of an ionic wind air purifier, and relates to the technical field of air filtering equipment. The air purifier comprises a purifier body, a supporting frame is arranged in the purifier body, and an ionic wind dust collection polar plate is installed in the supporting frame; a plurality of layers of filtering assemblies are arranged in the supporting frame. By adopting a multi-layer composite structure composed of the primary filter layer, the high-pressure ionization area, the ozone catalytic layer and the dust collection area, efficient cooperative treatment of different pollutants in air is achieved, air flow firstly passes through the primary filter layer to intercept large-particle dust, then fine particles are electrified and partially sterilized in the high-pressure ionization area, and therefore the air purification effect is achieved. Generated ozone by-products can continue to be deeply sterilized and disinfected, electrified airflow immediately passes through a special ozone catalytic layer subsequently, ozone can be efficiently decomposed into harmless oxygen, and the technical problem that ozone exceeds the standard in a traditional electrostatic dust collection technology is solved.

A debris flow discharge channel, comprising: a main channel through which the debris flow passes; a separation screen detachably connected to the main channel, the separation screen separating the main channel into an upper discharge channel and a lower discharge channel; a first accumulation area in communication with the upper discharge channel; a buffer channel in communication with the lower discharge channel, the buffer channel being provided with transverse energy dissipation ridges and longitudinal flow guide ridges; and a second accumulation area provided behind the buffer channel. The separation screen separates coarse and fine particles, which, in terms of service life, prevents the downstream discharge channel from being damaged by the huge impact force of coarse particles or being blocked by the accumulation, effectively prolongs the service life of the discharge channel, and, in terms of later maintenance, the separation of coarse and fine particles facilitates the maintenance and repair of the downstream main channel, thereby effectively reducing the maintenance cost in the later period.

The utility model relates to the field of indoor air purification, in particular to an indoor air purification and sterilization device with a filter screen capable of being quickly detached. The technical problems that in the using process of an air purification and sterilization device, due to the fact that the purification function is very single, most air purification and sterilization devices are of a fixed structure, replacement and cleaning can only be achieved through tedious disassembly, use is not convenient enough, a sterilization structure is not arranged, and the air purification effect is reduced are solved. According to the technical scheme, the indoor air purification and sterilization device with the filter screen capable of being rapidly detached comprises a fixed box and further comprises a dustproof assembly, an ultraviolet sterilization lamp, a purification assembly and a negative ion exciter. By arranging the dustproof assembly, air sucked into the fixed box can be preliminarily filtered, the ultraviolet germicidal lamp can remove poisonous gas in the air and kill bacteria in the air, then fine particulate matter can be captured through the purification assembly, and the structure in the purification box can be conveniently and rapidly disassembled.

The utility model relates to the technical field of wire drawing machines, in particular to a steel wire drawing mechanism which comprises a drawing cabinet, a processing cavity arranged in the drawing cabinet and a filtering channel with the top end communicated with the processing cavity from bottom to top, and a plurality of air inlet holes communicated with the processing cavity are formed in the top of the drawing cabinet. A processing cavity is formed in the drawing cabinet, a wire inlet and a wire outlet are formed in the two sides of the processing cavity, a plurality of wire drawing rollers and a wire drawing motor are horizontally arranged in the processing cavity, the wire drawing motor is used for driving the wire drawing rollers to rotate for wire drawing, the wire drawing motor is fixed in the drawing cabinet, and a filter screen and a fan are sequentially mounted in the filter channel from top to bottom; the device can automatically clean fine particulate matters formed by soap powder carbonization and white floccules formed by soap scorching on the surface of a steel wire, and can cool the steel wire in the drawing process, so that the device does not need to be frequently shut down for cleaning, the production efficiency of the wire drawing machine is ensured, and the maintenance cost of the wire drawing machine is reduced.

The present invention relates to a reverse osmosis water treatment system comprising: a second- stage LSRRO (Low Salt Rejection RO membrane process) unit using a regenerated membrane as a reverse osmosis (RO) membrane, said regenerated membrane being obtained by subjecting a damaged membrane or a membrane which has reached the end of its service life to a physical and / or chemical treatment for reuse. The present invention comprises: an intake unit including an inlet line for seawater or organic wastewater equipped with an inlet valve, a raw water storage tank for storing the seawater or organic wastewater as raw water, and a feed pump for pressurizing the raw water at a predetermined flow rate and pressure at predetermined intervals; a pre-treatment unit including an ultrafiltration (UF) membrane or microfiltration (MF) membrane for removing fine particulate organic matter contained in the raw water to reduce the load on a downstream reverse osmosis (RO) membrane; and a first-stage RO (Reverse Osmosis) process unit to separate ionic substances included in the filtered water pre-treated by the UF or MF membrane using a reverse osmosis membrane to produce treated water and to separate the raw water into treated water and concentrated water. According to the present invention, there is an advantage in that an LSRRO system can be provided which concentrates raw water to a high concentration with lower energy consumption than conventional RO systems employing commercial membranes.

The application discloses a kind of MXene modified polyimide nanofiber composite membranes and its preparation method and application, the method is prepared by acid etching method MXene nanosheet and polyamide acid molecular chain form strong hydrogen bond and coordination effect, significantly enhance interface binding force.MXene effectively transmits load, inhibits crack propagation, substantially improves the tensile strength and toughness of composite membrane, while extending the diffusion path of particulate matter, combined with the electrostatic adsorption effect produced by MXene itself conductivity, significantly improve the interception efficiency of PM0.3~PM2.5 fine particulate matter.The thermal imidization process ensures that PI matrix is completely converted into high-temperature-resistant structure, giving the material the ability to operate stably at high temperature for a long time.The composite membrane realizes four breakthroughs of high strength, high efficiency, low resistance and high dust capacity, providing a new solution for high-performance air filtration under harsh working conditions.

The invention discloses an atmospheric fine particulate matter on-line extraction and quantitative concentration device, and relates to the technical field of environmental protection, the atmospheric fine particulate matter on-line extraction and quantitative concentration device comprises an ultrasonic pool, a particulate matter collection bottle fixedly installed at the center in the ultrasonic pool and a collision type PM2.5 filter arranged at the top of the particulate matter collection bottle, a dimethylacetamide solvent is stored in the particulate matter collection bottle, and the collision type PM2.5 filter is arranged at the top of the particulate matter collection bottle. The annular groove is formed in the top of the ultrasonic pool, and an annular piece is inserted into the annular groove in a sliding mode and used for increasing the overall volume of the ultrasonic pool; the two-way lead screw is arranged in the horizontal direction and rotationally arranged in the ultrasonic pool, and two nuts are connected to the two-way lead screw in a threaded and sleeving mode; by starting the motor, the two-way screw rod can rotate, so that the two nuts are close to each other in the arrangement direction of the guide rod, and the two rotating pieces are driven to rotate and push the annular piece to move upwards in the annular groove, so that the overall height of the ultrasonic pool is increased, the volume of the ultrasonic pool is conveniently increased, and the ultrasonic pool is suitable for machining of different specifications.