50 results about "Fine particulate" patented technology

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 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.

This application belongs to the field of vacuum cleaner technology and discloses a handheld vacuum cleaner with multi-stage filtration, including a handheld handle, a battery, a suction tube, a filter cup, and a main unit. The suction tube has an arc-shaped mounting groove at its top, and air holes communicating with the tube cavity are provided on the bottom surface of the arc-shaped mounting groove. The filter cup is placed in the arc-shaped mounting groove, and its bottom has a first air inlet communicating with the air holes. A filter screen assembly is installed inside the filter cup. The main unit includes a cover, a sealing seat, an inner shell, and a fan assembly. Several internal air outlets are arranged on the inner shell, and several external air outlets are arranged on the cover. An air outlet sponge is placed between the inner shell and the cover. By setting up the filter screen assembly and the air outlet sponge, debris and larger dust particles are filtered by the filter screen assembly, while smaller dust particles are adsorbed onto the air outlet sponge, thereby ensuring that the air blown out from the external air outlets does not contain fine particulate dust or other pollutants, ensuring effective dust removal and cleaning.

The present application relates to fine particle sensing technology, and particularly relates to a microcavity vibration spectrum system and method for measuring inherent vibration spectrum of fine particles. The microcavity vibration spectrum system comprises an inherent vibration excitation light path unit and a microcavity detection light path unit; the inherent vibration excitation light path unit is sequentially provided with a pulsed light source, a vibrating mirror, an objective lens and a particle to be measured; and the microcavity detection light path unit is sequentially provided with a tunable laser light source, an adjustable attenuator, a polarization controller, a coupling optical waveguide, an optical microcavity, a photodetector and an oscilloscope. The present application can realize precise measurement of sound waves caused by particle vibration of mesoscale particles and biological particles with inherent vibration frequency in the sub-megahertz-gigahertz frequency range.

The utility model relates to dust removal tower technical field, the utility model provides a kind of high-efficiency dynamic water dust removal equipment, it is installed in the cyclone bin of dust removal tower and located below spray layer, for making flue gas and spray water fully contact, including cylinder, the top and bottom of cylinder are open;Positioning column is arranged in cylinder, and it is arranged along the axial direction of cylinder, and the containing space is formed between the outer wall of positioning column and the inner wall of cylinder;A plurality of annular flow control panels are located at the bottom opening of cylinder, and flow guide groove is formed between adjacent annular flow control panels, and flow guide groove is used to make flue gas flow into containing space in tangent direction;A plurality of adsorption balls are placed in containing space, and adsorption ball can rotate around positioning column under the drive of flue gas.The above technical scheme solves the technical problems that the dust removal device in the prior art is difficult to meet the fine particulate matter emission requirements, and has high operating energy consumption, frequent maintenance, poor load adaptability and may cause secondary pollution.

This invention relates to the field of circulating fan technology and discloses a window circulating fan with filtration and purification and its processing equipment. The window circulating fan with filtration and purification includes an air guide chamber, an air inlet chamber fixedly connected to the outer wall of the air guide chamber, and air guide blades installed inside the air guide chamber. A dual-axis motor is fixedly connected to the inner wall of the air guide chamber, and the air guide blades are fixedly connected to the output end of the dual-axis motor. This invention achieves multi-stage high-efficiency purification through the synergistic effect of a filter cover, atomizing nozzle, and alkaline purification liquid. First, it intercepts large particulate impurities. Then, it utilizes a water mist curtain to capture fine particulate matter, while simultaneously reacting chemically with acidic harmful gases such as nitrogen oxides in the airflow, effectively removing hazardous substances from the gas, ensuring the safety of the emitted air, significantly reducing the concentration of harmful gases in the welding workshop, providing a safer and healthier working environment for workers, and improving the overall environmental protection effect.

The application discloses a fine particle material dry separation device and a dry separation system. The fine particle material dry separation device comprises a rack, a separation bin, a separation bed, a driving device, a dust removal system and an air supply system. The separation bed comprises an upper bed body and a lower bed body located below the upper bed body. The upper bed body is provided with a first upper bed body end corresponding to the position of a feeding port and a second upper bed body end located opposite to the first upper bed body end. The position of a first discharge port corresponds to the second upper bed body end. The upper bed body is provided with a sieve hole. The aperture of the sieve hole increases in the direction extending from the first upper bed body end to the second upper bed body end. The lower bed body is provided with a first lower bed body end corresponding to the position of the first upper bed body end and a second lower bed body end located opposite to the first lower bed body end. The position of a third discharge port corresponds to the first lower bed body end. The position of a second discharge port corresponds to the second lower bed body end. The lower bed body is provided with an air inlet hole.

The application relates to the technical field of bank protection structures, and discloses a flood control and slope protection ecological sponge toughness bank protection structure which comprises a soil body, a slope protection mechanism, a bank protection mechanism and a water storage mechanism, the bank protection mechanism comprises a base groove arranged on the upper surface of the soil body. The ecological sponge toughness bank protection structure can improve the scouring resistance and stability of the soil body through the gabbion layer, the ecological floating island layer can purify water, the demand for ecological restoration is met, the overall stability, drainage performance and scouring resistance can be improved through the base groove, the reserved opening, the main frame layer, the reinforcing rib and the stone blocks, the filter isolation layer prevents fine particulate matters from flowing away with flowing water, the sponge body layer provides water absorption and storage functions, the ecological bag layer provides vegetation coverage, the two layers are in synergistic action, the ecological benefits and flood control capacity of the bank protection structure are improved, and the medium properties and drainage performance required for the seed germination and growth are ensured through the vegetation planting layer.

This invention discloses a system and method for treating ultrafine particulate matter and sticky dust in waste incineration flue gas, relating to the field of flue gas purification. In the first treatment zone, the surface charge of the particulate matter in the flue gas approaches the isoelectric point. When the flue gas enters the second treatment zone, the particulate matter undergoes a bridging and agglomeration reaction, increasing the particle size. When the flue gas enters the third treatment zone, the surface of the particulate matter undergoes chemical hydrophobic modification, increasing the hydrophobic angle of the particle surface. This invention, through the first, second, and third treatment zones, agglomerates submicron-sized ultrafine particulate matter that is difficult to capture into micron-sized large particles that are easy to capture, improving dust removal efficiency and solving the problem of low capture efficiency of ultrafine particulate matter in traditional bag filters.

The present application relates to the technical field of feed processing, and discloses a kind of straw, liquor dreg mixed micro-storage feed for beef cattle wrapping processing method and equipment system, wherein equipment system includes wrapping machine and unloading device, and wrapping machine includes rack, wrapping room, feeding device, mixing and stirring device, wrapping device, weighing and metering device and linkage mechanism.Mixing and stirring device's stirring blade is spirally distributed to realize the uniform mixing of straw section and dreg powder;Wrapping device uses the wrapping net rope of net structure, and mesh size is less than dreg powder particle size, to prevent fine particulate material from scattering;Weighing and metering device monitors material weight in real time, and linkage mechanism automatically controls feeding to stop and wrapping to start when material reaches preset value;Unloading device realizes the automatic handling of finished product wrapping.The present application solves the technical problems of mixed material scattering, component content unevenness and low degree of production automation, and realizes continuous automatic processing.

This invention relates to the field of flue gas purification and waste heat utilization technology, specifically a flue gas contact condensation method, apparatus, and system. The method involves introducing boiler flue gas into a spray tower for direct heat and mass transfer with the spray liquid, achieving one-step deep cooling of the flue gas. The spray liquid and flue gas outlet temperatures are maintained within a safe range. A demister is installed to restore the temperature to a safe threshold, suppressing frost and entrainment. Near-freezing point closed-loop temperature control is implemented. A refrigerant and oxidizing agent are dynamically added to the spray liquid, combined with online temperature and concentration closed-loop regulation, to achieve deep condensation and synergistic purification of the flue gas. This invention features a simple process, using only a single chiller unit as the cold source. The flue gas is directly cooled through a single spray circulation loop, and a localized warming and anti-frost process is employed. This allows for simultaneous deep removal of fine particulate matter and suppression of entrainment. It also offers advantages such as low-temperature acid corrosion resistance, low scaling and crystallization, high skid-mountability, and low investment, making it widely applicable in low-temperature pretreatment of boiler flue gas.

This invention relates to the field of mobile source exhaust particulate matter monitoring technology, and discloses a device and method for measuring the number concentration of nanoscale high-concentration particles based on condensation charging. The measuring device includes a volatile particle removal device, a two-stage condensation growth device, a unipolar charging device, and a dual-path Faraday cup detection device. Sample gas enters from the inlet of the volatile particle removal device, and the outlet of the volatile particle removal device is connected to the inlet of the two-stage condensation growth device; the outlet of the two-stage condensation growth device is connected to the inlet of the unipolar charging device; and the outlet of the unipolar charging device is connected to the inlet of the dual-path Faraday cup detection device. This invention overcomes the shortcomings of existing technologies, achieving efficient removal of volatile particles, high-concentration measurement, and a 10nm particle size detection limit without dilution for measuring the number concentration of ultrafine particulate matter in motor vehicle exhaust, greatly improving detection sensitivity and measurement accuracy.

This utility model provides a welding protection mechanism, belonging to the field of welding technology. It includes a base, a protective box on top of the base, a sliding cover assembly at the opening of the protective box, and a fumigation assembly on the protective box. The fumigation assembly includes a collection box, inside which two filter drawers, one from top to bottom, slide. A dust extraction hood connected to the top of the collection box is located on the inner wall of the first protective box. This utility model, through the sliding cover assembly, covers the opening of the protective box, preventing sparks from flying onto workers during welding. Through the fumigation assembly, when the suction fan is activated, the welding fumes are drawn into the collection box. A HEPA filter combined with an activated carbon filter efficiently filters the fumes and fine particulate matter generated during welding, effectively preventing the emission of fine particulate matter or harmful gases from the welding fumes into the air, thus protecting worker health and improving the quality of the working environment.

This utility model relates to the field of tobacco products, and more particularly to a filter cigarette holder and cigarette. The filter cigarette holder of this utility model includes: a carrier, which is a filter rod; a nanofiber membrane, in sheet form, bonded and fixed to one or both ends of the carrier, comprising: a nanofiber filter layer; and a nanofiber adhesive layer formed on the nanofiber filter layer; wherein the nanofiber filter layer is bonded and fixed to the filter rod by the nanofiber adhesive layer. In this utility model, the nanofiber filter layer can filter out harmful substances such as tar and fine particulate matter that are difficult to filter with traditional filter holders, such as cellulose acetate rods, greatly improving filtration efficiency.

This utility model discloses a gas filtration device, which includes an inlet cabinet and an outlet cabinet. The inlet cabinet is positioned above the outlet cabinet, and a filter screen is installed between the two cabinets. Two dust collection bags are installed on both sides inside the inlet cabinet, and the dust collection bags are surrounded by a partition net. A ventilation cavity is formed between the adjacent partition nets on the outer sides of the two dust collection bags. Through holes are provided on the side panels of the inlet and outlet cabinets, as well as on the doors of both cabinets. A filter box is located below the filter screen, and a filter assembly is installed inside the filter box. An exhaust fan is located below the filter box, and the exhaust port on the filter box is connected to the air inlet of the exhaust fan via a ventilation pipe. The gas filtration device inputs gas through the side panel of the inlet cabinet, filters it through the dust collection bags and the filter box, and outputs it through the side panel of the outlet cabinet. This effectively filters fine particulate matter near the ground, maintaining a high level of cleanliness in the space where machine racks and workbenches are located in the workshop.

This utility model discloses a medical odor-controlling air filter, relating to the field of air filter technology. The utility model includes a housing, with an intermittent air intake component on the top of the housing, and an air intake pipe fixedly connected to the top of the intermittent air intake component. This utility model features a multi-layered, high-efficiency filtration structure. The primary filter layer uses a non-woven fabric material with large pores, effectively filtering large particles of dust, hair, and other impurities from the air, providing initial purification and protecting subsequent filter layers. The activated carbon filter layer removes odors and some harmful gases from the air, improving the odor environment. The HEPA filter layer removes fine particulate matter from the air, ensuring air cleanliness. The photocatalytic coating uses an ultraviolet lamp for catalytic decomposition, further removing harmful gases from the air. Through the synergistic effect of multiple filtration methods, deep purification of the air in the medical room is achieved.

The utility model discloses a kind of composite processing purification devices of mute safety, belong to air purification technical field, including device pipe body, the inside detachably installation of device pipe body one end has primary filter element, fan is installed in the front of primary filter element, insulating cover is installed in the front of fan, high-voltage electrostatic precipitator is detachably installed in the inside of insulating cover, soundproof board is installed in the front of high-voltage electrostatic precipitator, adsorption decomposition co-effect filter element is installed in the front of soundproof board, gathering cover is installed in the front of adsorption decomposition co-effect filter element;The utility model, by primary filter element filtering solid-state foreign matter, high-voltage electrostatic precipitator adsorbs fine particulate matter, adsorption decomposition co-effect filter element removes gaseous pollutant, cooperate anion generator and anion emitter in gathering cover improve air and inhibit microorganism, and many components are cooperated to realize the comprehensive treatment to air pollutant, and the purification effect is greatly improved.

This utility model relates to the field of gasification technology for municipal solid waste that has undergone shallow carbonization and crushing, and particularly to a circulating fluidized bed gasification device. The device includes a pyrolysis gasification unit, a high-temperature gasification chamber, and a cyclone separator. The bottom of the pyrolysis gasification unit has a first gasifying agent inlet, and the side wall has a coarse particle material inlet and a second gasifying agent inlet. The upper part of the high-temperature gasification chamber is connected to the pyrolysis gasification unit to feed the first volatile matter generated by the pyrolysis of coarse particles in the pyrolysis gasification unit into the high-temperature gasification chamber. The bottom of the high-temperature gasification chamber has a first gasifying agent inlet and a second gasifying agent inlet, and the side wall has a fine particle material inlet. The upper part of the high-temperature gasification chamber is connected to the upper part of the cyclone separator to feed the second volatile matter generated by gasification in the high-temperature gasification chamber into the cyclone separator. The gasification device provided by this utility model can effectively reduce tar content, reduce fly ash content, maintain stable operation, and improve gasification intensity and syngas quality.

This bottom-filling ton bag filling device belongs to the field of packaging machine filling technology. This invention solves the problems of dust generation and complex structures in current filling equipment solutions for powdery and fine particulate matter. The main frame of this invention is equipped with a feeding system, an upper supporting mechanism, and a lower lifting mechanism. The lower supporting mechanism is mounted on the lower lifting mechanism, and the upper supporting mechanism is located below the feeding system. Hooks are mounted on the main frame via the upper supporting mechanism and are used to hang the packaging bags. The lower supporting mechanism supports the packaging bags. This bottom-filling ton bag filling device fixes the upper supporting mechanism, eliminating the need for movement. The lower lifting mechanism drives the lower supporting mechanism to move longitudinally, reducing the distance between the feeding system and the bottom of the packaging bag, thus minimizing dust generation during the ton bag filling process.

The application discloses a kind of air purification filter screen's brush washing device, it is related to air purification equipment maintenance technical field, including cleaning box, the top of the cleaning box is hinged with sealing cover by hinge, the application is closed by adopting cleaning box and negative pressure dust collection structure, all cleaning processes are completed in closed box, can be collected simultaneously the dust generated by brushing, solve the problem that traditional manual bare cleaning is easy to cause dust to drift everywhere, secondary pollution of surrounding environment, while avoiding secondary adhesion filter screen of impurities from outside, guarantee clean work environment clean and controllable, integrated rotary brush surface cleaning and intelligent recognition type filter hole dredging dual cleaning structure, both can efficiently peel off filter screen surface layer dust, also can accurately position filter hole by fiber optic sensor, drive brush rod to clean embedded fine particulate matter inside filter hole, solve the limitation that traditional cleaning can only clean surface layer, filter hole deep impurities cannot be effectively removed, restore filter screen permeability in all directions.

This utility model relates to the field of debris handling technology and discloses a debris handling device for furniture processing and cutting. The device includes a support frame, a protective shell fixedly connected to the top of the support frame, a worktable fixedly connected to the inner wall of the protective shell, a diagonal brace fixedly connected to the side wall of the protective shell, a motor fixedly connected to the top of the diagonal brace, a chain assembly fixedly connected to the output end of the motor, and a vibration component provided on the side wall of the chain assembly. The vibration component includes an eccentric wheel, the side wall of which is fixedly connected to the side wall of the chain assembly, and a rotating wheel provided on the outer wall of the eccentric wheel. In this utility model, the diagonal brace drives the chain assembly to rotate, which in turn drives the eccentric wheel to rotate. The rotating wheel rotates on the outer wall, causing the hollow plate to move and the filter plate to shake. This solves the problem of unfiltered debris being directly discharged, leading to dust and fine particulate matter spreading into the air and polluting the workshop and surrounding environment, thus improving the safety of the debris handling device.

This utility model discloses a dust removal device for waste gas treatment, including a water tank, a dust collection box, a spiral plate, and multiple atomizing nozzles. The dust collection box is located above the water tank and includes a shell and a sealing cover. The shell is mounted on the water tank, and the sealing cover is sealed onto the opening on the top surface of the shell. An air inlet is located on the side wall of the shell, and an air outlet is located on the top surface of the sealing cover. The spiral plate is spirally arranged inside the shell, with the air inlet opposite to the outer end of the spiral plate and the air outlet opposite to the inner end of the spiral plate. The bottom surface of the spiral plate is connected to the inner bottom surface of the shell, and the top surface of the spiral plate abuts against the sealing cover. Multiple atomizing nozzles are arranged spirally along the inner bottom surface of the shell. The atomizing nozzles are connected to the water tank. This increases the contact time and area between the water mist and the waste gas, resulting in more thorough and uniform contact, and improving the collection and treatment efficiency of fine particulate matter in the waste gas.

The application provides a dust cleaner roller brush cloth, which is a three-layer hollow tissue and is composed of a surface layer, a middle connecting layer and an inner layer; the surface layer is a dust cleaning working layer and is formed by terry tissue composed of first warp yarn, second warp yarn and first weft yarn; the inner layer is a base layer and is formed by plain weave tissue formed by interweaving of fourth warp yarn and third weft yarn; the middle layer is formed by interweaving of third warp yarn and second weft yarn, the surface layer and the inner layer are connected together through the third warp yarn, and a continuous axial hollow pipeline is formed in the roller brush cloth. The application increases the specific surface area through the pile structure of the terry tissue of the surface layer to enhance the physical interception of tiny particles, realizes the synchronous capture of water-soluble and oil-soluble pollutants through the introduction of the composite yarn with hydrophilic / lipophilic amphiphilic adsorption function, and ensures excellent fast drying and air permeability through the hollow pipeline structure, so that the cleaning efficiency of fine particulate matter and mixed pollutants is fundamentally improved.

This utility model belongs to the field of construction dust removal technology. It discloses an environmentally friendly dust removal device for construction, comprising a main body box with a dust suction hole through the top wall. A first partition is horizontally fixed inside the main body box, and a second partition is vertically fixed to the lower wall of the first partition. Fine and coarse filter plates are hinged to both sides of the second partition. Based on a graded filtration mechanism using the difference in impact force of particles, it achieves automatic separation of coarse and fine particles, effectively extending filter life and improving system stability. Simultaneously, it monitors filter blockage status and automatically alarms based on changes in air pressure in the cavity below the first partition, solving the problem of untimely maintenance. The bottom cover is detachable and features a latch design, enabling automatic dust discharge, making cleaning quick and convenient. This comprehensively solves the technical problems of easily damaged filters, difficult maintenance, and low cleaning efficiency in traditional dust removal equipment.

The present application relates to the technical field of data processing, in particular to a PM2.5 data calibration method and system for pollution peak value. In the present application, the logic of constructing a dynamic interval based on model operation fine particulate matter fluctuation characteristics can capture the nonlinear evolution law and thus get rid of the static threshold limit, the way of constructing a plane topological network for suspected peak value and measuring the spatial diffusion gradient value effectively fuses the core geometric constraint condition, the mechanism of deriving the directional flux value relying on the sine constant of the internal angle of a triangle and generating the dispersity scalar to participate in the benchmark comparison, the process of converting the simple concentration comparison into the quantitative evaluation process of the transport intensity with meteorological physical support, the accurate distinction between the real extreme value driven by the meteorological external cause and the false burr caused by the equipment failure, the targeted replacement and retention operation according to the identification result, the breakthrough of the technical barrier that the conventional means is easy to confuse the true and false of the peak value, and the physical real property and the traceability analysis accuracy of the data calibration sequence are effectively ensured.

This utility model relates to the field of metallurgical environmental protection technology, specifically a dust control device for steelmaking plants. It includes a dust collection hood, a cyclone dust collector, a spray cooling tower, and a bag filter, connected sequentially along the dust flow direction. A flue gas emission pipe is connected to the side wall at the top of the bag filter, and an installation cylinder is connected to the flue gas emission pipe. This utility model adopts a three-stage treatment process of "cyclone dust collection + spray cooling + bag filtration." The cyclone dust collector first removes larger coarse dust particles, reducing the load on subsequent equipment. The spray cooling tower lowers the temperature of the high-temperature flue gas to the suitable operating range of the bag filter (usually below 200℃), while simultaneously capturing some fine particles through water mist. The bag filter performs final fine filtration to ensure that the outlet dust concentration meets ultra-low emission standards. A settling tank and circulating water pump are installed at the bottom of the spray cooling tower to achieve the recycling of spray water, reducing wastewater discharge and external water replenishment.