254 results about "Air contamination" patented technology

The invention belongs to the technical field of air pollution monitoring, and particularly relates to an air pollution monitoring system and method based on big data. According to the method, the pollutant diffusion topological structure is constructed through collection degree fusion of the multi-source environmental data, the prediction accuracy of air pollution monitoring is effectively improved, and when the pollutant diffusion topological structure is constructed, the influence of meteorological parameters and geographic information on a pollutant transmission path is comprehensively considered, so that the prediction accuracy of the air pollution monitoring is improved. The method enables a corresponding prediction mechanism to more accurately describe a pollutant space-time evolution rule in an air environment, introduces a prediction error-based iterative optimization mechanism after a prediction result is output, and compares the pollutant prediction concentration with the actual monitoring concentration in real time, thereby achieving the real-time prediction of the pollutant. And a diffusion weight coefficient and a diffusion probability matrix in the pollutant diffusion topological structure are adjusted, so that a corresponding prediction mechanism can maintain high-precision prediction capability, and relatively accurate data support is provided for early warning of an air environment.

The invention discloses a gas detector for air pollution detection, and belongs to the technical field of gas detection.The gas detector comprises an outer shell and an inner shell which are arranged in a sleeved mode and used for detecting gas to be detected; the adjusting mechanism is used for adjusting the height and angle of the detection mechanism; wherein an inner air inlet cavity is formed in the inner shell, and an outer air inlet cavity is formed between the outer shell and the inner shell; a sensor is mounted on the inner wall of the inner air inlet cavity; an exhaust pipe communicated with the inner air inlet cavity is arranged on the outer shell, and a fan is mounted in the exhaust pipe; a rotating ring is rotationally arranged on the radial inner wall of the outer shell and used for adjusting the opening and closing states of the inner air inlet cavity, the outer air inlet cavity and the exhaust pipe. The inner gas inlet cavity is a core detection area, a sensor is installed to make direct contact with to-be-detected gas, and the outer gas inlet cavity is a split-flow filtering area and serves as a temporary storage area of follow-up impurities. The exhaust pipe is communicated with the inner air inlet cavity, the fan is arranged in the exhaust pipe, and the fan provides active air suction and exhaust power and supports reverse blowing and cleaning of residual impurities in the cavity.

The invention relates to the technical field of seed selection, and provides a crop seed selection system which comprises a screening device, the screening device is detachably connected with a first air screening machine, the screening device is used for separating seeds from seed shells and dust, and the screening device comprises an elevator, a winnowing mechanism and a cyclone separator; the elevator is arranged on the side close to the first air screening machine, grains enter the elevator after being screened in the winnowing mechanism, the winnowing mechanism is used for separating seed husks and dust in the grains, the cyclone separator communicates with the winnowing mechanism, the cyclone separator is used for separating and collecting the seed husks and the dust in the winnowing mechanism, and the cyclone separator is used for separating and collecting the seed husks and the dust in the winnowing mechanism. The airtight device is detachably connected with the discharging port of the elevator, the airtight device is used for controlling the air inlet in the elevator, then the air inlet direction of the winnowing mechanism is adjusted, and the technical problem that in the prior art, air pollution is large in the crop seed selecting process is solved.

An indoor air cleaning system with a networking mechanism is disclosed and applied in an indoor field (A) for detecting and cleaning air pollution completely. A real-time air quality monitoring in the indoor field (A) is achieved by arranging plural gas detectors (A), at least one gas molecule control hardware device (2), at least one air conditioning device (3) and a networked cloud computing service device (4) in the indoor field (A) and forming an intelligent linked system by the arranged gas detectors (1) in an outdoor filed and the indoor field (A). Meanwhile, the air pollution in the indoor field (A) is also detected and intelligently compared with an ambient air quality status, and an air guiding volume of an air guiding fan (21) is instantly controlled according to the air quality. Whereby an energy saving benefit of the effective controlling operation of the purification device is achieved.

The invention relates to the technical field of air pollution detection, in particular to a flue gas detector and a calibration detection method thereof, and the flue gas detector comprises a concentration fluctuation analysis module, an abnormal data screening module, an error interval collection module, a parameter trend analysis module and a period stability judgment module. According to the method, abnormal data and equipment drift influence are dynamically screened, an error change interval is actively collected, and through linkage comparison of multi-source parameter trends and separation of working condition disturbance, instrument abnormality and periodic offset signals, automatic screening of concentration data and operation parameters under multiple links is achieved, feature recognition and abnormal partition are associated, and the accuracy of the system is improved. The sampling effectiveness, the data stability and the instrument parameter change trend under the continuous detection working condition are managed in a layered mode, a traceable dynamic calibration chain is formed, the smoke detection consistency and the data exception handling capacity in the complex emission environment are remarkably improved, and an intelligent judgment mechanism of data grading rejection and trend aggregation is perfected.

The utility model relates to the technical field of plastic bottle recycling, in particular to smashing equipment for plastic bottle recycling, which comprises a smashing equipment body, a feed hopper penetrates through the surface of the smashing equipment body, a sliding plate is fixedly connected to the surface of the smashing equipment body, and an upper adjusting plate is slidably connected to the surface of the sliding plate. A lower adjusting plate is inserted into the bottom end of the upper adjusting plate, inserting blocks are inserted into the surfaces of the two sides of the sliding plate, a spray pipe penetrates through the top end of the crushing equipment body, a spray head is fixedly connected to one end of the spray pipe, a water pipe is screwed to the other end of the spray pipe, and a filter plate is inserted into an inner cavity of the spray pipe. The crushing equipment has the beneficial effects that the upper adjusting plate and the lower adjusting plate which can slide are arranged between the feeding hopper and the crushing equipment body, the opening degree of the feeding port is changed, the feeding flow is controlled, the feeding efficiency and stability are improved, and the production efficiency is improved; dust particles can be adsorbed and settled, flying of dust is reduced, and air pollution is reduced.

The invention provides an intelligent variable-frequency dust fall system for a construction site. A flying dust monitoring module is used for monitoring dust particulate matter information of the construction site; the dust falling module is used for carrying out dust falling operation on the construction site; the water supply module is used for collecting treated water so as to supply water to the dust falling module during the dust falling operation; the frequency conversion control module is used for controlling respective working states of the dust falling module and the water supply module according to the dust particulate matter information, and dynamically regulating and controlling operation of dust falling equipment by detecting the dust particulate matter information of flying dust in real time, so that accurate and efficient flying dust treatment is realized, the utilization efficiency of water resources and energy can be optimized, and the dust falling equipment can be flexibly suitable for various construction environments; the flying dust treatment effect and the resource saving capacity are remarkably improved, and the problem of air pollution caused by flying dust on the construction site is effectively solved.

The invention discloses a stationary pollution source carbon emission continuous monitoring device, and relates to the technical field of air pollution detection, the stationary pollution source carbon emission continuous monitoring device comprises a case and a driving assembly, one side of the case is fixedly provided with a monitor main body, the bottom of the case is provided with a fixed pipe, and the outer side of the lower end of the fixed pipe is rotatably connected with a reversing pipe; and filters are arranged in the two ends of the reversing pipe. When the carbon emission content of a pollution source is monitored, the motor is started firstly, the sliding seat is driven to reciprocate through the double-output-shaft speed reducer and the reciprocating lead screw, the piston rod slides in one cavity in the case in a reciprocating mode, and therefore the air pressure change in the case is adjusted; the inside of one end of the reversing pipe is communicated with the inside of the case through the fixing pipe, so that external to-be-detected gas can be sucked into the case through the first one-way valve, and at the moment, the carbon dioxide sensor probe on the monitor main body can monitor the carbon content of the air.

A system for cleaning, zeroing, and preventing air pollution in indoor space includes several gas detection devices, a central control monitoring device, and several gas exchange and filtration devices. The gas detection devices detect and output indoor and outdoor air pollution data. The central control monitoring device receives the outdoor and indoor air pollution data to perform an intelligent computation and comparison, locate an air pollution location in the indoor space, and transmit a control command intelligently. Each of the gas exchange and filtration devices is combined with a smart switch for the control command to control the gas exchange and filtration devices to be enabled, so that the air pollution is filtered and exchanged by the gas exchange and filtration devices, thereby allowing the indoor air pollution data detected by the gas detection devices in the indoor space to be a safety detection value.

This invention provides an absorption tower, comprising: an inlet section with a flue gas inlet; an absorption section above the inlet section, containing an absorbent bed and a reflux port; a scrubbing section above the absorption section, connected to the absorption section, containing a spray assembly and a liquid outlet; an outlet section with a flue gas outlet communicating with the scrubbing section at its upper end; and a recovery assembly including a connecting pipe, the first end of which is connected to the liquid outlet, and the second end of which is connected to the reflux port, to discharge liquid from the scrubbing section into the absorption section. The technical solution provided in this application solves the problems in related technologies where, when absorbent is introduced into a carbon dioxide absorption tower, some absorbent is released into the air with the flue gas, causing air pollution and absorbent loss.

The utility model relates to the technical field of paint sprayers, and discloses a paint sprayer capable of preventing paint from splashing for a peripheral alloy knife, which comprises a paint spraying mechanism used for being in butt joint with an air pump, atomizing paint and spraying the paint on the surface of the peripheral alloy knife, and a paint storage assembly used for storing the paint is arranged at the lower end of the paint spraying mechanism. Gas is in butt joint with an air pump through a gas butt joint opening, enters a gas storage cavity and drives a paint spraying atomization nozzle to evenly atomize paint and accurately spray the paint to the surface of a peripheral alloy cutter, and a paint storage assembly provides stable paint flowing and ensures that the paint can be continuously supplied and is transmitted to a paint spraying mechanism with proper pressure; the blocking assembly effectively blocks sprayed paint from splashing, the safety of the working environment and operators is protected, the whole device improves the spraying quality, paint waste and air pollution are greatly reduced, the working efficiency is improved, and the health and safety of workers are ensured.

This utility model provides a ventilation structure for preventing air pollution in enclosed spaces, relating to the field of air pollution ventilation. The ventilation structure includes a ventilation fan housing, with a mounting cover snapped onto the left side of the housing. The mounting cover is fixed to the surface of the ventilation fan housing by screws, and a wall-mounted bracket is provided on the left side of the mounting cover. This ventilation structure, through the cooperation of the mounting cover, screws, a first assembly bracket, a second assembly bracket, a base plate, a first docking groove, a fixing groove, a pin, a hole, a top plate, a second docking groove, a reinforcing groove, a through hole, a locking rod, a telescopic structure, and a limiting structure, allows for convenient fixing of the upper and lower parts of the ventilation fan housing, thus completing the installation of the ventilation fan housing. This solves the problem of current ventilation structures for preventing air pollution in enclosed spaces being inconvenient to install, resulting in time-consuming and labor-intensive installation.

The application relates to the technical field of intelligent household appliances, and discloses a method for controlling an oil fume exhauster, which comprises the following steps: controlling the rotation of an oil screen under the condition that a cooking bench is in an open state; and adjusting the rotation speed of the oil screen according to the rotation speed of a fan of the oil fume exhauster. In the application, the oil screen is immediately put into a working state to filter oil fume after the cooking bench is detected to be opened, then the rotation speed of the oil screen is adjusted according to the rotation speed of the fan of the oil fume exhauster, the rotation speed of the oil screen is kept matched with the rotation speed of the fan, the working mode of the oil screen is more flexible, the filtering efficiency of the oil fume is improved, and air pollution is reduced. The application further discloses a device for controlling the oil fume exhauster and the oil fume exhauster.

The utility model relates to a kind of powder backflow prevention devices, including storage bin and filter box, the side fixed mounting of storage bin has feed pipe, fixed mounting is connected with pipe between storage bin and filter box, the other side fixed mounting of filter box has exhaust pipe, the front of filter box is installed with box door, box door is fixedly connected with filter box by bolt, the side installation of box door has filter assembly, filter assembly includes coarse filter plate and fine filter plate, the inside installation of filter box has the anti-backflow component of preventing powder backflow.The utility model can carry out multistage interception to powder by the coarse filter plate and fine filter plate of filter assembly, avoid powder with gas through exhaust pipe and directly discharge, reduce the air pollution caused by powder drift, solve the installation and dismounting structure of existing filter screen more complex, usually need to dismount with the aid of tool, lead to the cleaning, replacement process of filter plate is complicated, consume more time and manpower, affect filtration effect.

The utility model relates to a kind of multi-functional high-efficiency indoor air purifier, and sub-machine system mode is used in the shell, and air state signal is transmitted by signal tower. The upper part of air purifier is two sub-machine parking spaces with automatic charging device, and the lower part is mother machine system. When air pollution is weak, sub-machine is dispatched according to the set route to start purification, and carry out inspection while passing the set target point, and feedback real-time air quality. When air pollution is strong, the air purification device of mother machine starts to work. Sub-machine system works with four air purifiers through connecting plate, and controller and detection device are installed in the center. The upper surface of air purifier is installed with power device, and power lift is provided. Mother machine system purifies air through electrostatic precipitator and formaldehyde removal module. When there are multiple pollution sources in the room, the purification degree and purification efficiency are greatly improved, and the utility model also has the functions of real-time monitoring indoor air quality, releasing negative ions, sterilization and disinfection.

The utility model relates to the field of electronic component processing, and discloses a spraying device for electronic component processing, which comprises an operating table, connecting plates are fixed on two sides of the top of the operating table, the inner side walls of the two connecting plates are rotatably connected with the same conveying belt, a rotating mechanism for rotating the conveying belt is arranged at the top of the operating table, and a U-shaped seat is fixed at one end of the top of the operating table. The top in the U-shaped seat is of a cavity structure, a plurality of through holes are formed in the top in the U-shaped seat at equal intervals, first baffles are fixed to the two symmetrical side walls of the U-shaped seat, a spraying mechanism used for spraying electronic elements is arranged in the U-shaped seat, and a filtering mechanism is arranged at the top of the U-shaped seat. Paint and small coating particles generated in the spraying process can be effectively removed through the filtering mechanism, air pollution is reduced, the body health of workers is protected, electronic elements are dried through the drying mechanism after spraying is completed, the electronic elements do not need to be transferred to other drying equipment, the production period is shortened, and the working efficiency is improved.

The utility model discloses a device for collecting powder in a reaction kettle, which is characterized in that an upper cover of the reaction kettle is provided with a connecting pipeline, a collecting box is connected above the connecting pipeline, the upper end of the collecting box is connected with a pipe connector, a fan seat is arranged at the upper part in the collecting box, the fan seat is provided with a fan, and a connecting seat is arranged below the fan; according to the utility model, the fan is arranged to extract air with dust in the reaction kettle, so that the air pollution caused by the dust and the damage to the personal health of operators are avoided, and the dust-free reaction kettle has the advantages that the dust-free reaction kettle is simple in structure, convenient to use and high in practicability. According to the device, the filter element capable of vibrating is arranged, so that materials can be fed into the reaction kettle again, waste of the materials is avoided, the production cost is reduced, and the device has relatively good practicability and applicability.

The utility model discloses an oil fume suction system for wet-process battery diaphragm production, which is mainly used for effectively recovering and treating oil fume generated in the wet-process battery diaphragm production process. The system comprises an oil smoke cover, an electrostatic oil removal cooler, an electrostatic oil removal filter, a smoke exhaust fan, a smoke exhaust chimney and the like. The oil fume cover is located at an oil fume generation source and used for capturing and guiding oil fume, the electrostatic oil removal cooler cools the oil fume to liquefy the oil fume, and the electrostatic oil removal filter removes oil drops according to the electrostatic adsorption principle, so that it is ensured that discharged air reaches the environmental protection standard. And the smoke exhaust fan and the smoke exhaust chimney act together to ensure that the treated air is discharged smoothly and meets the environmental protection requirement. The design of the system aims at reducing air pollution of a workshop and improving the cleanliness of a production environment by efficiently recovering oil smoke. The oil fume treatment device has good environmental protection property and high efficiency, can effectively improve the air quality of a workshop, and ensures effective treatment of oil fume in the production process.

The application provides a kind of automobile exhaust pollutant comprehensive detection device and method, it is related to air pollution detection technical field, automobile exhaust pollutant comprehensive detection device includes outer tube and exhaust sensor, support portion is equipped in outer tube, blade and cleaning piece can be rotated together on support portion, when the exhaust of temperature less than preset value is passed into outer tube, it can drive blade and cleaning piece to rotate, so that cleaning piece can be contacted with exhaust sensor surface and relative movement is generated, so that the pollutant adhered to exhaust sensor surface can also be cleaned in the stage of automobile cold start, guarantee the operation stability of exhaust sensor and the accuracy of detection data.When the exhaust of temperature greater than or equal to preset value is passed into outer tube, blade and cleaning piece coincide with support portion in the circumference of outer tube, to reduce the obstruction to exhaust flow path, reduce the influence on exhaust emission, while heating module operates.

This invention discloses a method for recovering rare earth elements from industrial solid waste fluorogypsum, belonging to the field of industrial solid waste treatment technology. The technical solution includes the following steps: 1) Pretreatment of solid waste fluorogypsum: fluorogypsum is screened, crushed, and then fed into a raw material tank; 2) Leaching of rare earth elements: ammonium sulfate solution is added to the raw material tank for soaking, followed by solid-liquid separation to obtain leachate and water-leached residue. The water-leached residue undergoes secondary solid-liquid separation to obtain waste residue and filtrate one; 3) Separation of precipitates containing rare earth elements: a precipitant is added to the leachate for reaction to obtain mixed slurry one. Mixed slurry one undergoes solid-liquid separation to obtain precipitates containing rare earth elements and filtrate two; 4) Filtrate recycling: filtrate one and filtrate two are mixed to obtain a mixed solution, which is then treated with water and recycled. This invention uses a milder ammonium sulfate solution to treat waste fluorogypsum fine powder, greatly saving production costs while avoiding toxic gas emissions and air pollution problems.

The embodiment of the utility model relates to the technical field of air pollutant or nuisance source identification and detection, and discloses air pollution and nuisance investigation equipment and system. The investigation equipment comprises at least two air inlet units and sensor units correspondingly connected with the air inlet units. A central processing unit; and a motion unit; wherein the at least two air inlet units are inclined in different directions and collect at least two air samples from different directions and different positions, and the central processing unit is connected with each sensor unit and the motion unit. Through the mode, the embodiment of the utility model can collect at least two air samples from different directions and different positions, accurately and efficiently detect the concentration data of various air pollutants in the air samples, and utilize the concentration data to control the equipment to effectively move towards a pollution source so as to quickly position the position of the pollution source.

This invention relates to the field of data monitoring technology, specifically to an intelligent control method for workshop air purification based on environmental data. The method involves: obtaining upward trend points and concentration inflection points based on changes in concentration data sequences; identifying concentration rise periods and concentration fall periods based on the distribution characteristics of concentration inflection points; identifying suspected abnormal data points based on the differences in the trends of concentration rise and fall periods and the local data differences at the upward trend points; determining the air pollution risk level based on the quantity, interval, and concentration change characteristics of the suspected abnormal data points; and adaptively adjusting a preset concentration anomaly threshold based on the air pollution risk level to obtain an adaptive threshold. This invention adjusts ventilation power based on the adaptive threshold, thereby reducing the power consumption of the air ventilation system while improving the efficiency of air purification in the workshop.

This utility model discloses an integrated device for high-efficiency screening and dust removal of building aggregates, relating to the field of building engineering technology. It includes a support frame; a screening assembly comprising a dust cover, a frame fixedly connected to the bottom of the dust cover, a screen fixedly connected to the inner wall of the frame, an extension plate fixedly connected to one side of the frame, and fixed blocks fixedly connected to both sides of the bottom of the frame; and a vibration assembly comprising a drive motor, one side of which is fixedly connected to one side of one of the fixed blocks, and a transmission rod fixedly connected to the output shaft end of the drive motor. This integrated device for high-efficiency screening and dust removal of building aggregates uses an air pump to create negative pressure inside the dust cover, causing free dust generated during screening to be transported to a dust collection bag under negative pressure, thereby avoiding air pollution, improving the quality of the working environment, and reducing the harm of dust to the human body.

The utility model provides a composite multifunctional indoor air pollution abatement machine which comprises an abatement machine shell, an abatement assembly arranged in the abatement machine shell and comprising a filter cover arranged at the top of the abatement machine shell and a filter structure arranged in the abatement machine shell and used for abatement of air; and the quick dismounting assemblies are arranged on the left side and the right side of the treatment machine shell and comprise fixing plates installed on the left side face and the right side face of the treatment machine shell and quick dismounting structures arranged on the fixing plates and used for conveniently dismounting the filter cover. By means of the arranged treatment assembly, step-by-step precise filtering of air can be achieved, various impurities, unpleasant odor and tiny dust in the air can be effectively removed, and therefore the air quality is remarkably improved, by means of the arranged quick disassembly assembly, the installation and fixing process of the filter cover becomes quick, simple and convenient, and the air quality is improved. And moreover, the filter casing can be quickly disassembled by a worker during maintenance, so that the operation process is further simplified, and the practicability and convenience are enhanced.

The invention discloses an automatic drainage device for an ammonia-containing non-condensable gas pipeline. The automatic drainage device comprises the ammonia-containing non-condensable gas pipeline, a water-sealed tank; one end of the liquid guide pipe is connected to the ammonia-containing non-condensable gas pipeline, and the other end of the liquid guide pipe is inserted below the liquid level of the water-sealed tank; one end of the gas return pipe is communicated with the top of the ammonia-containing non-condensable gas pipeline, and the other end of the gas return pipe is inserted into the water-sealed tank and positioned above the liquid level in the water-sealed tank; the automatic drainage system comprises a liquid level detection module and a drainage pump which are connected with each other; the control system is connected with a drainage pump of the automatic drainage system; and according to a signal of the liquid level detection module, starting and stopping of the draining pump execution module are controlled. According to the scheme, by arranging the liquid guide pipe, ammonia gas is effectively prevented from escaping from the water-sealed tank to the external environment, air pollution and potential safety hazards caused by leakage of the ammonia gas are prevented, by arranging the gas backflow pipe, cyclic utilization of the ammonia gas is achieved, pressure balance in the system can be maintained, and normal operation of an ammonia-containing non-condensable gas pipeline is further guaranteed.

The utility model discloses a container type sewage treatment equipment, including main part, mounting mechanism, ventilation mechanism and auxiliary component, mounting mechanism includes mounting frame, first spring, spacing frame, rotating rod and fixed block, ventilation mechanism includes fan, gas hood, exhaust pipe and filter, the mounting frame includes mounting frame, first spring, spacing frame, rotating rod and fixed block, ventilation mechanism includes fan, gas hood, exhaust pipe and filter. The auxiliary assembly comprises a door, a filter pad, a magnet strip and a mounting grid, under the mutual matching action of the mechanisms, the device is rapidly fixed and designed, a fan is conveniently disassembled and remounted, later maintenance or fan equipment replacement is facilitated, in addition, malodorous gas in the main body of the device is purified through a filter before being discharged, and the purification effect of the malodorous gas is improved. Harmful gases such as hydrogen sulfide, ammonia gas and volatile organic compounds (VOCs) are effectively removed, and air pollution is reduced.

This invention relates to the field of air pollution control technology, and in particular to a formaldehyde adsorbent from Forsythia suspensa and its application in formaldehyde adsorption. This invention uses Forsythia suspensa waste (such as withered branches) as raw material, and modifies it using a calcium chloride-assisted neutral protease method. Combined with specific preparation conditions, the resulting Forsythia suspensa formaldehyde adsorbent has a large specific surface area and a porous surface, exhibiting excellent adsorption conditions. During adsorption, -OH groups play a role; the adsorption process conforms to pseudo-second-order kinetics and the Freundlich isotherm, exhibiting a physicochemical mixed adsorption with chemical adsorption as the primary process. It involves multi-molecular layer heterogeneous site adsorption and a spontaneous endothermic reaction, achieving the national standard of 0.08 mg / m³ after 22 hours. 3 Even after eight desorption and regeneration cycles, it still retains a certain adsorption effect on formaldehyde.

The invention relates to the technical field of air purification, and discloses an indoor large-flow air supply and exhaust air purification system which comprises an air supply fan, an air exhaust fan and an MCU main board connected with the air supply fan and the air exhaust fan, and the MCU main board is provided with processing programs suitable for different application scenes; the air supply fan is used for supplying outdoor air into a room, and the air exhaust fan is used for exhausting indoor air out of the room; the MCU main board is connected with a clock, a noise sensor, an air quality detection sensor and a personnel identification sensor; the MCU main board is used for obtaining an application scene where the current indoor environment is located according to information fed back by the clock, the noise sensor, the air quality detection sensor and the personnel identification sensor so as to control the air supply fan and the air exhaust fan to supply and exhaust air indoors with the maximum flow as far as possible under the conditions that no one is in a room, the environment noise is large, and the air pollution is serious. Ventilation and air exchange can be achieved to the maximum extent, the method is an effective means for treating indoor air pollution, and the indoor ventilation and air exchange efficiency can be improved.

The invention discloses laser carving equipment for a special-shaped curved surface workpiece, relates to the technical field of laser carving equipment, and solves the problems that smoke dust is generated when laser carving is adopted by the laser carving equipment, and the smoke dust can cause air pollution in a plant. The laser etching equipment for the special-shaped curved surface workpiece comprises a storage component, the upper end of the storage component is fixedly connected with a supporting frame, the front side and the rear side of the supporting frame are each provided with a transparent door, the upper end of the supporting frame is fixedly connected with a top plate, and a suction fan is arranged in the middle of the upper end of the top plate; and one side of the upper end of the top plate is of a bent structure, a blowing fan is arranged at the bent structure of the top plate, and a two-shaft movable platform is arranged on the upper side in the supporting frame. Smoke dust in the supporting frame is ventilated and discharged to the position above the suction fan, the upper end of the suction fan can be connected with a pipeline, the pipeline directly communicates with a pollution gas treatment chamber outside the plant, and the discharged smoke dust is treated through the pollution gas treatment chamber.

The invention discloses a pollution grade evaluation method for an urban industrial pollution site, and relates to the technical field of pollution detection, and the method comprises the steps: employing an unmanned aerial vehicle-mounted air pollution detection instrument for inspection, collecting air pollution concentration data in real time, separating a background from a hot spot through a grid mean-standard deviation model, and carrying out the weighting to generate an air pollution index, based on the air pollution index, dynamically regulating and controlling the soil sampling density, carrying out secondary gridding point distribution in a field area, measuring soil pollution concentration data, and obtaining the soil pollution index by using the same'background + hot spot 'weighting strategy; fusing the soil pollution index and the air pollution index as a comprehensive pollution index, and comparing a four-level threshold value to immediately judge the site pollution level; according to the method, air-ground multi-dimensional anomalies are taken into consideration, high-risk area encryption sampling and low-risk area economic evaluation are realized, and an accurate, efficient and visual decision basis is provided for urban brown land redevelopment, treatment and resource release.