14 results about "Inhalable particles" patented technology

The invention provides a high-precision simulation method for filtering performance of a mining dustproof mask fiber structure. The high-precision simulation method comprises the following steps: establishing a randomly distributed fiber aggregate model; a transient state is activated in Fluent, a turbulence model Realizable k-epsilon is selected, the pressure drop of a mining dust mask and the flow field characteristics of nanoscale fiber gaps are simulated and predicted, a DPM model is activated, the migration track of 0.3-10 [mu] m inhalable particles is tracked, and the dust trapping process of a fiber structure is simulated in the transient state environment. By simulating the influence of different fiber diameters, fiber volume fractions, airflow flows and the like on the filtering performance of the fiber structure of the mining dust mask, the research and development of the high-filtering-performance mining dust mask can be guided in a targeted manner, and the influence of the internal fiber structure of the dust mask on the filtering performance of the dust mask is mastered.

The utility model relates to welding environmental protection equipment technical field, concretely is a kind of welding fume collecting device high -efficient filtering mechanism, including collection cabinet, filtering collection mechanism and spraying mechanism, filtering collection mechanism and spraying mechanism are fixedly connected on collection cabinet, filtering collection mechanism includes the sliding groove of being set in the outer surface of collection cabinet. In the utility model, by the setting of sliding frame, intermediate filter screen and fine filter screen, the three-stage physical filtration structure of primary filter screen, intermediate filter screen and fine filter screen is formed, combined with harmful gas adsorption assembly, form complete filtration system, the welding fume particles of different particle sizes can be accurately intercepted, harmful gas in welding fume is processed specifically, improve the efficiency of filtration, effectively reduce the concentration of inhalable particulate matter in workshop, make the air after purification more close or reach national standard, greatly improve welding operation environment, reduce the risk of worker suffering from respiratory diseases and pneumoconiosis.

The invention relates to the technical field of the Internet of Things, in particular to a central air conditioner energy saving method and device based on the Internet of Things and electronic equipment. Building a priority coefficient according to the indoor temperature and the personnel density, and generating an emergency response strategy based on the priority coefficient; the air supply intensity is adjusted according to the collected carbon dioxide concentration and the mass concentration of the inhalable particles; optimizing refrigerating unit load distribution based on chilled water supply temperature, return water temperature and water pump flow; judging the equipment performance abnormity based on the load index of each time window in the monitoring period; based on the construction result of the priority coefficient in the management period and the judgment result of the performance abnormity of the equipment in each time window, sending a maintenance early warning to a user; and updating the maintenance early warning process according to the equipment current, the equipment lubricating oil viscosity and the freezing water conductivity collected in the management period. The operation efficiency of the central air conditioner is effectively improved.

The embodiment of the invention relates to an indoor space air quality grade prediction method, which comprises the following steps: acquiring a human flow thermodynamic diagram, monitoring temperature and humidity, gas and inhalable particles, merging into a first record group, after model training is completed, taking each group of four types of monitoring tables with aligned time as a second record group, and calculating the air quality grade of an indoor space according to a preset first time frequency; sorting T second record groups collected recently according to time to form a current record group sequence, traversing all the second record groups of the current record group sequence, taking the current traversal group as the current record group, taking each pixel point of the people flow thermodynamic diagram, combining the group temperature, humidity, n types of gas concentration and m types of inhalable particle density to form a pixel feature vector, and calculating the current record group sequence according to the pixel feature vector. And generating a single-point feature map, and obtaining an environment feature sequence after traversing. And inputting the data into a model to predict an air grade vector, taking a grade corresponding to the maximum grade probability as a monitoring grade, and finally forming an air quality monitoring table by the current time and the monitoring grade and adding the air quality monitoring table.

This utility model relates to the field of mining fan technology and discloses an underground regulating fan for coal mines, comprising: a mounting base, an insertion hole on the upper outer wall of the mounting base, an insertion rod passing through the inner side of the insertion hole, an adjusting bolt connected to one inner wall of the insertion hole, and the adjusting bolt extending through to one outer wall of the mounting base, a fan frame welded to the top of the insertion rod, a circular fan frame connected to the inner side of the fan frame via a damping shaft, a cover fixed to the rear end of the fan frame by bolts, and a cover plate fixed to the outer wall of the cover near the fan frame. This underground regulating fan for coal mines is equipped with an atomizing nozzle, which can spray water or air cleaner supplied by a water supply pipe towards the fan blades through pressurization by a liquid pump. This, combined with the rotating fan blades, reduces dust in the mine air, decreasing the number of inhalable particles in the coal mine. Furthermore, the fan's orientation can be freely adjusted according to operational needs through rotation and pitch adjustment, resulting in better applicability.

The present application relates to the technical field of coal mining, and particularly relates to a dustproof ventilation device for underground coal mine, comprising a filter box, a blowing assembly and a filter, wherein the blowing assembly and the filter are both installed in the filter box, the filter box is further provided with a spraying port, the blowing direction of the blowing assembly is arranged corresponding to the spraying area of the spraying port, and is further arranged corresponding to the filter surface of the filter. The beneficial effect is that the spraying port and the filter are arranged in sequence along the airflow direction of the blowing assembly, and the blowing direction of the blowing assembly is simultaneously aligned with the spraying area and the filter surface, forming a treatment process of 'water mist capturing-filtering and purifying'. The dust-containing airflow is firstly fully contacted and collided with fine water mist in the spraying area, realizing the preliminary wetting and settlement of large-particle dust and part of inhalable particulate matters; then, the un-captured fine dust and residual harmful gas are guided to the filter surface along the airflow, and are further removed through physical interception or adsorption.

The invention discloses a method for evaluating potential airway epithelial toxicity of inhalable particles based on organoids, and relates to the technical field of toxicity detection. According to the method for evaluating the potential airway epithelium toxicity of the inhalable particles based on the human ciliary eversion airway organ, objective quantitative analysis on the epithelium structure (epithelium thickness) and the cell function (ciliary movement and goblet cell secretion) of the human airway is realized; a rapid and accurate evaluation method is provided for inhalation toxicity research of various types of inhalable particles.

The invention belongs to the technical field of air solid dust particulate matter detection, and particularly relates to a solid dust particulate matter screening device and method. The device comprises a gas driving and flow stabilizing module used for providing and adjusting working gas, so that the working gas enters the device at a set flow; the resuspension module is used for accommodating solid particle samples to be screened; the particle size cutting module is used for performing inertial cutting classification on the airflow carrying the particles, separating and removing the particles with the particle size larger than the preset cutting particle size and outputting fine particles with the particle size smaller than or equal to the preset cutting particle size; the enrichment module is specifically a filter membrane fixer and is used for enriching and fixing the fine particulate matters on a filter membrane; according to the dry-method controllable and repeatable fine particle screening and enriching device, dry-method controllable and repeatable fine particle screening and enriching are achieved, and physicochemical property analysis, toxicological evaluation or component comparison research can be conveniently conducted on inhalable particles such as PM2.5.

The invention relates to the technical field of pet product development, discloses bentonite broken pet litter and a preparation method thereof, and aims to solve the problem of insufficient comprehensive performance of existing broken cat litter. The pet sand is prepared from the composite modified bentonite blocky material, the material modification processing technology is simple, and the raw materials are taken from the nature. The composite material has the characteristics of high strength, low dust density, stable property and the like. The use efficiency of the broken cat litter can be remarkably improved, and compared with unmodified bentonite, the prepared cat litter is better in water absorption, lower in dust capacity, higher in adsorption capacity, almost free of inhalable particles in use and good in deodorization and odor removal capacity. Compared with bean starch, corn starch and other organic raw materials, the starch does not mildew in the processing, storage and other processes, does not have toxin or peculiar smell, is high in weather resistance, is low in content of heavy metals such as lead and arsenic, and is environment-friendly in preparation and use.

The present invention discloses an innovative solution designed to comprehensively address air pollution source influenced hotspots by targeting both particulate matter and gaseous pollutants Utilizing advanced purification techniques, this technology efficiently removes dust particles, suspended particulate matter, and respirable suspended particulate matter from the air, ensuring the generation of dust free clean air. Additionally, through secondary purification stages, harmful gaseous compounds such as nitrogen oxides, sulfur oxides, volatile organic compounds, hydrocarbons, and carbon monoxide are decomposed, further improving air quality. With its ability to operate within an influence zone of 15 meters with maximum influence area of 30m radius under calm wind condition and a remarkable capacity to clean large volumes of air in a short timeframe, this technology offers a sustainable and effective solution to mitigate the adverse effects of air pollution and promote a healthier living environment.

The utility model relates to the technical field of filtering brackets, in particular to gas emission equipment for environmental governance. The exhaust fan comprises an exhaust fan body, a filtering device is arranged outside the exhaust fan body and comprises an air pipe and a filter screen, the interior of the air pipe is fixedly connected with the exhaust fan body, a U-shaped limiting rod is fixedly connected to one side of the filter screen, two T-shaped grooves are formed in the air pipe, T-shaped plates are slidably connected to the interiors of the T-shaped grooves, and the U-shaped limiting rod is fixedly connected to the other side of the filter screen. The sides, close to each other, of the two T-shaped plates are fixedly connected with a cleaning frame, the outer portion of the cleaning frame is slidably connected with an air pipe, and one ends of the two T-shaped plates are fixedly connected with a pulling plate. The problems that traditional gas exhaust equipment for environmental governance is not provided with a filtering part for filtering dust particles carried in gas, and dust particles contained in unfiltered gas are directly discharged into the atmosphere, so that the concentration of inhalable particles in the air is increased, and the air quality is reduced are solved.

The invention belongs to the technical field of medical instruments, particularly relates to a medical surgical abdomen cleaning device, and provides the following scheme aiming at the problems that an existing filtering mode is too simple, the filtering effect is poor, filter screen arrangement is unreasonable, a large number of viruses and inhalable particles are still contained after gas is filtered, and the like. The bottom of the disinfection box is fixedly connected with a drying box used for drying gas, the top of the disinfection box is fixedly connected with a first gas inlet pipe used for gas inlet in a penetrating mode, the top of the disinfection box is fixedly connected with a first gas outlet pipe in a penetrating mode, and the other end of the first gas outlet pipe is communicated with the drying box; under the condition that the purification effect is guaranteed, filtered gas can circularly enter the abdomen of a patient, the power of the auxiliary pump is adjusted, it is guaranteed that the air pressure of the abdomen is stable, the service life of the filter screen is prolonged as much as possible, it is guaranteed that the filter screen can be efficiently used, and therefore the operation cost is reduced, and the economic pressure of the operation patient is relieved.

The ultra-large-diameter central thermal insulation pipe comprises an outer pipe and an inner pipe which are concentrically arranged in a sleeved mode, the two ends of the inner pipe are flared and then welded to the inner wall of the outer pipe, and a sealed cavity is formed between the inner pipe wall and the outer pipe wall and kept in a vacuum state. A strip-shaped cloth bag structure wraps or spirally winds the outer wall of the inner pipe in the axis direction of the inner pipe to form a heat preservation layer, and the strip-shaped cloth bag structure is formed by alternately arranging and packaging one or more sets of reflecting layers and heat insulation layers in a heat preservation sleeve. And a plurality of annular righting reinforcing ribs are sleeved outside the thermal insulation layer at intervals. Multi-layer reflection of the heat preservation layer in the heat preservation pipe can effectively prevent heat loss, and the heat preservation effect is improved. Meanwhile, the strip-shaped cloth bag structure can prevent the aerogel powder from escaping, and the health risk of inhalable particles is reduced. In addition, gaps between the inner pipe and the outer pipe are uniformly distributed by arranging a plurality of centralizing reinforcing ribs on the outer side of the heat-insulating layer, the sealing performance of the annular space of the inner pipe and the outer pipe can be effectively maintained, a heat conduction path is cut off, and the heat-insulating effect is ensured.

The application discloses a vertical electrostatic spray composite cyclone separation grading air purification system and a control method. The system comprises a cylinder, an array type cyclone separation purification system in the cylinder, an air duct, an air guide fan in the air duct, an electrostatic spray purification system, a particulate matter concentration detection system and a dust collecting chamber. The array type cyclone separation purification system and the electrostatic spray purification system are suitable for reducing the respirable particulate matter concentration, and the air duct and the air guide fan are suitable for transmitting airflow. The cyclone separation purification system comprises four cyclone separators with corona wires, and the electrostatic spray purification system comprises a circuit system, a water pump and a liquid delivery pipeline, and an internal metal nozzle array. The circuit system is used for charging the metal nozzle and driving the water pump and the air guide fan. The water pump and the liquid delivery pipeline are used for supplying liquid to the metal nozzle, so that the electrostatic spray is generated. The application can meet the indoor air purification standard, reduce the large pressure drop phenomenon of dust-containing airflow through the filter screen, reduce the maintenance cost of the equipment and realize high-efficiency dust removal.