27 results about "Fog collection" patented technology

This invention relates to the field of wind power generation technology and provides a combined wind power generation device, including a base and a connecting block rotatably mounted on the base; a tower fixedly mounted on the top of the connecting block; a generator for wind power generation mounted on the top of the tower and wind blades mounted on the generator; several collection nets respectively located on both sides of the tower for collecting sea fog; water collection troughs respectively installed at the bottom of the collection nets for centralized drainage; and a servo motor fixedly mounted on one side of the base for driving the tower to rotate and storing the wind blades, the output shaft of the servo motor being fixedly connected to the rotating shaft of the connecting block. The combined wind power generation device provided by this solution can achieve the dual functions of wind power generation and sea fog collection, while also providing storage for the equipment to prevent damage in extreme weather conditions, and featuring multiple reinforcement and auxiliary support designs to ensure operational safety.

This invention relates to a high-efficiency fog collector unaffected by fog flow direction and its manufacturing method. First, a superhydrophobic coating is formed on the surface of a copper sheet. Then, patterns are drawn on the copper sheet using a laser as punctuation marks. After electroplating, multiple superhydrophilic protrusions are formed. Finally, a uniquely shaped umbrella-like structure is formed through plastic stamping. The fog collector provided by this invention not only has high fog collection efficiency and adapts to any fog flow direction, but also uses abundant and readily available raw materials. Furthermore, the manufacturing process is simple, time-saving, and highly efficient, providing new ideas for the design of future high-efficiency fog collectors.

The present invention discloses a method for preparing a triple bionic fog-collecting surface, belonging to the technical field of wetting modification of metallic copper foam surfaces. The method comprises pretreating the surface of the copper foam; performing a first laser processing on a first preset position on the first surface of the pretreated copper foam to obtain a first striped structure; performing a second laser processing on a second preset position on the first surface of the copper foam to obtain a second striped structure; the first striped structure and the second striped structure form a plurality of intersections, and the plurality of intersections form a plurality of square super-hydrophilic sites on the second surface of the copper foam; the first surface and the second surface are the upper surface and the lower surface of the copper foam, respectively; and thus, a triple bionic fog-collecting surface is obtained. The triple bionic fog-collecting surface prepared by the present invention has excellent fog collection capabilities.

Even when the fan is not installed correctly, the fog collection device of the present invention can prevent the motor shaft of the filter motor from seizing with the shaft insertion hole of the filter, and can prevent the filter from contacting and breaking with other components, and can maintain the exhaust function based on the fan. The fog collection device includes: a fan (10) that is rotated by a fan motor (11), and a filter (12) that is installed by inserting the motor shaft (13a) of the filter motor (13) into the shaft insertion hole (12a). When the operation is started, the filter installation status determination unit (25) determines the installation status of the filter (12). If the filter installation status determination unit (25) determines that the filter (12) is not installed correctly, the control unit (23) prevents the filter (12) from rotating by the filter motor (13) and allows the fan (10) to continue rotating by the fan motor (11).

An apparatus and process for fog mitigation can be include a mechanism to reduce fog formation and / or condense the fog into water to avoid fog being formed and moving through a site. Embodiments can be configured to utilize at least one fog collection mechanism positioned adjacent a vaporizer utilized to vaporizer a cryogenic liquid so that fog that may form adjacent the vaporizer is removed from air surrounding the vaporizer and prevented from spreading beyond the vaporizer to other areas of a site having the vaporizer (e.g. a hydrogen fueling station, etc.).

The application discloses a dust falling device for building engineering, which comprises a base, a fog gun barrel is installed above the base, a water tank is installed on one side of the base, and the water tank and the fog gun barrel are connected through a pipeline, a plurality of spray heads are fixedly installed on one side of the inner cavity of the fog gun barrel, an adjusting assembly is fixedly installed between the base and the fog gun barrel, a fan assembly is fixedly installed in the inner cavity of the fog gun barrel, a recovery assembly is installed above the water tank, the recovery assembly solves the problem that the water mist of a traditional fog gun machine falls due to high-speed airflow, drives the collection plate to turn over and expand into a funnel-shaped structure, uses an inclined flow guide surface to receive the undispersed water mist falling near the spray opening of the fog gun barrel due to the disturbance of the high-speed airflow of the fan, and guides the collected water mist back to the water tank through a collection tray and a recovery pipe, so that the water resource which does not effectively participate in dust falling is recycled and reused, the water resource utilization efficiency of the device is improved, and the water resource consumption of the dust falling operation of the device is reduced.

A high-speed fog collection method based on the self-driven water jet phenomenon of micro-droplets, belonging to the field of fog collection, is realized by a fog collector and the water inside the fog collector. The inner and outer surfaces of the fog collector have superhydrophobicity, and the surface through-hole array thereof has superhydrophilicity. The outer surface of the fog collector can easily capture the tiny fog droplets in the fog flow. The tiny fog droplets grow and merge on the outer surface of the fog collector to form sub-millimeter-sized micro-droplets. The superhydrophilic through-holes on the surface of the fog collector will be wetted by the water inside the fog collector. Once the micro-droplets come into contact with the superhydrophilic holes, they will form a whole with the water inside the fog collector. The micro-droplets will enter the inside of the fog collector under the action of the internal Laplace pressure and generate a water jet phenomenon. In addition, the micro-droplets will also merge with other micro-droplets around the superhydrophilic holes during the process of entering the inside of the fog collector and enter the inside of the fog collector together. The present invention has the advantages of small droplet shedding size, high droplet shedding frequency, and high fog collection rate, etc.

The invention discloses a surface-modified 3D printing three-dimensional rain and fog collection comb tooth water collection and storage device and a modification solution preparation method, and belongs to the technical field of atmospheric water resource development and fog collection. The device comprises an integrated base, a plurality of conical comb teeth and spherical protrusions distributed on the surfaces of the conical teeth. A plurality of comb teeth are arranged on the base according to a set interval array to form a three-dimensional structure, so that the fog drop capturing area is increased, and directional gathering of fog drops is facilitated. The conical tooth structure is subjected to wet chemical modification treatment, a hydrophilic and hydrophobic gradient area is constructed on the surface, and rapid condensation and transportation of fog drops are achieved. All the components are integrally formed through the 3D printing technology, the structure parameters are adjustable, the preparation efficiency is high, and adaptability is high. The integrated water storage device is further arranged and communicated with the comb tooth structure, and continuous collection and storage of fog water can be achieved. Systematic experimental data further verifies the water collection performance superiority and evaporation inhibition capability of the proposed structure under different design parameter conditions. Compared with the prior art, the fog collecting device has the advantages of being high in fog collecting efficiency, high in anti-blocking performance, light in structure, easy and convenient to manufacture, long in service life and the like, and is suitable for efficient fog water collection application in arid areas or outdoor environments.

The invention discloses a design method of a liquid-like surface mist collection active synergistic device based on a pyroelectric effect. The method comprises the following steps: step 1, pretreating a pyroelectric wafer material; step 2, performing liquid phase modification on the pyroelectric wafer; step 3, covering a PDMS micro-pattern and pasting a film; step 4, performing hydrophilic patterning on the pyroelectric wafer; and step 5, combining fog collecting devices. The fog collection active synergistic device designed by the method can realize active collection of fog on the surface by virtue of the pyroelectric effect of the pyroelectric material, the fog is accelerated to be condensed into small water drops on the surface, the small water drops are converged into large water drops under the low-viscosity effect of the liquid-like surface, and the liquid drops quickly slide off to be exposed out of the smooth surface after being converged to a certain degree, so that the fog collection effect is improved. Water mist condensed small water drops are collected again on the surface under the pyroelectric action, and efficient mist collection is achieved in cycles. The active synergistic device for fog collection is simple in preparation process, small in finished product, free of a large external device, easy to carry and capable of being carried and used.

The cold rolling machine oil mist collecting device comprises oil mist collecting assemblies symmetrically arranged on the two sides of a rack, each oil mist collecting assembly comprises a fixed cover, one side of each fixed cover is fixedly connected with the rack, the other side of each fixed cover is fixedly connected with a movable cover, and a ventilation opening is formed in the side, close to the corresponding movable cover, of each fixed cover; the center of the top of the fixing cover is provided with a smoke exhaust air door, the top of the fixing cover is fixedly connected with a smoke exhaust pipeline, the smoke exhaust pipeline is located between the smoke exhaust air door and the rack, the smoke exhaust air door and the smoke exhaust pipeline are each provided with an air volume adjusting mechanism, and the bottom in the fixing cover is fixedly connected with a drained water collecting assembly. The invention further discloses a cold rolling machine oil mist collecting method. According to the cold rolling machine oil mist collecting device and method, the problems that according to an existing oil mist collecting device, oil mist collection is unbalanced, the efficiency is low, oil mist water is prone to being evaporated and condensed into oil drops, and the oil drops drip to the surface of a plate strip, and the plate surface quality is poor are solved.

The invention discloses a shrapnel detection machine, and belongs to the technical field of shrapnel detection, the shrapnel detection machine comprises a salt spray test box body, the salt spray test box body is provided with a detection cavity with an upper opening, a box cover is hinged to the upper part of the detection cavity, a spray tower and a fog collecting funnel are arranged in the detection cavity, and two opposite sides of the detection cavity are respectively provided with a placing rack. The bottom end of the detection cavity is provided with a clamping type drive I which reciprocates in the Y-axis direction and a clamping type drive II which reciprocates in the X-axis direction, and sample holders are arranged on the placement frame and are symmetrically arranged on the two sides of the spray tower; the sample holder comprises a placing cross rod vertically erected on the two placing racks and adjustable material placing devices arranged at equal intervals along the upper wall of the placing cross rod. According to the elastic piece detection machine provided by the invention, the elastic piece sample is independently placed, and the elastic piece sample is overturned and inclined in the detection process to ensure that salt mist uniformly settles on the surface of the elastic piece sample, so that the reliability of a detection result is improved.

The invention discloses a hydrophobic-hydrophilic Janus composite membrane with efficient fog collection and organic pollutant degradation performance and a preparation method and application thereof.The composite membrane is of a three-layer structure, a base membrane of the composite membrane is a PAN hydrophilic layer, the base membrane is sequentially covered with a photocatalytic middle layer and a plaque PVDF hydrophobic layer, and the photocatalytic middle layer and the plaque PVDF hydrophobic layer are sequentially arranged on the base membrane. The base membrane is a plaque-shaped PVDF hydrophobic layer, the photocatalytic middle layer is a PAN hydrophilic layer doped with a nano TiO2 photocatalyst, the base membrane and the photocatalytic middle layer form an integrated membrane, the coverage rate of the plaque-shaped PVDF hydrophobic layer on the integrated membrane is 60-75%, and nano TiO2 is nano titanium dioxide P25. According to the Janus two-side film, fog can be captured and purified at the same time, new fresh water increment is achieved without additional energy, the composite film Janus Ti-40 is optimal in property, the long-time fog collection rate can reach 51.7 + / -5.8 mg / (cm < 2 >. Min) at most, simulated sunlight is used as a light source, and the effect that the fresh water can be increased is achieved. The photocatalytic Janus composite membrane can stably achieve the degradation rate of 70% or above on bisphenol A while collecting fog, and the composite function of fog collection and water purification is successfully achieved.

The invention relates to an adjustable channel system for collecting water droplets captured by a fog collector; in which it is possible for the shape of the system to be adapted and its longitudinal tension to be adjusted according to the behaviour of the fog collector in the field, in order to optimise the water collection rate in environments subject to strong winds; said fog collector comprising a woven mesh panel for trapping water from the fog, which is mounted vertically and tensioned between two support columns spaced apart from one another in accordance with the size of the mesh and defining therebetween a longitudinal axis (y) of the fog collector; the adjustable channel system comprises: a) a flexible channel made of impermeable textile material, for collecting water droplets falling from the mesh, comprising two longitudinal flexible laminar bodies that diverge from one another from a common lower edge, forming therebetween a longitudinal container cavity with an upper opening of adjustable width; (b) an adjustable securing component comprising transverse supports that can be fixed to the support columns, oriented horizontally and perpendicular to the longitudinal axis (y) of the fog collector, and vertical supports that can be fixed to the support columns, perpendicular to the transverse supports, as well as a set of movable fastenings that can move axially on the transverse and vertical supports; (c) a set of tension cables that are threaded through the channel and are equipped with a flat connector at each end, by means of which two upper tension cables are coupled to the transverse supports such that they can move on same, while a lower tension cable is coupled to the vertical supports such that it can move along the height of same, such that the width of the upper channel opening can be adjusted by moving said cables.

The invention discloses a hydrophobic-hydrophilic Janus composite membrane with efficient fog collection and organic pollutant degradation performance and a preparation method and application thereof.The composite membrane is of a three-layer structure, a base membrane of the composite membrane is a PAN hydrophilic layer, the base membrane is sequentially covered with a photocatalytic middle layer and a plaque PVDF hydrophobic layer, and the photocatalytic middle layer and the plaque PVDF hydrophobic layer are sequentially arranged on the base membrane. The base membrane is a plaque-shaped PVDF hydrophobic layer, the photocatalytic middle layer is a PAN hydrophilic layer doped with a nano TiO2 photocatalyst, the base membrane and the photocatalytic middle layer form an integrated membrane, the coverage rate of the plaque-shaped PVDF hydrophobic layer on the integrated membrane is 60-75%, and nano TiO2 is nano titanium dioxide P25. According to the Janus two-side film, fog can be captured and purified at the same time, new fresh water increment is achieved without additional energy, the composite film Janus Ti-40 is optimal in property, the long-time fog collection rate can reach 51.7 + / -5.8 mg / (cm < 2 >. Min) at most, simulated sunlight is used as a light source, and the effect that the fresh water can be increased is achieved. The photocatalytic Janus composite membrane can stably achieve the degradation rate of 70% or above on bisphenol A while collecting fog, and the composite function of fog collection and water purification is successfully achieved.

The present invention belongs to the field of fog collection, and mainly relates to an ultrafast fog collector, comprising a fog collection unit, a side water pipe, a drain outlet, and water inside. The inner and outer surfaces of the fog collection unit are both super-hydrophobic, and an array of super-hydrophilic through holes is staggered on its surface. The surfaces of the side water pipe and the drain outlet are both super-hydrophobic. Multiple fog collection units are horizontally bonded from top to bottom between two vertically placed side water pipes, the drain outlet is bonded to the lower part of the side water pipe, and water is injected into the interior of each fog collection unit from the water injection port, thereby forming an ultrafast fog collector. The ultrafast fog collector proposed by the present invention has the advantages of small droplet shedding size, high droplet shedding frequency, and fast fog collection rate, and can achieve high-efficiency fog collection on foggy days; in addition, the present invention can design the size of the fog collection unit, the size of the super-hydrophilic holes, and the hole spacing to adapt to fog environments with different flow rates to achieve the best fog collection effect.

A water extractor for use in an environmental control system includes a duct having an inlet end and an outlet end and at least one fog harvester insert mounted within the duct. The at least one fog harvester insert being rotatable about an axis.

The present invention relates to a water mist drainage device and a water mist drainage method for aluminum online quenching equipment, belonging to the technical field of online quenching, the water mist drainage device comprises a bracket and at least one group of vertically arranged water mist collection pipelines, the water mist collection pipeline comprises a nozzle, a telescopic air duct and a fixed pipeline arranged in sequence along the flow direction of the water mist, the nozzle is arranged above the water shield, and the air inlet end of the nozzle is directed toward the water shield; the fixed pipeline is fixed on the bracket, and the end of the fixed pipeline away from the telescopic pipeline is sequentially provided with a heat exchanger, a bend pipe and a fan along the flow direction of the water mist; the water mist drainage method comprises a water mist collection pipeline for collecting water mist is arranged above the water shield, the water mist in the water mist collection pipeline is introduced into the heat exchanger, and the water mist is recovered after being liquefied by the heat exchanger. The present invention can effectively prevent the diffusion of water mist, reduce the air humidity in the factory, and reduce the damage to the equipment in the factory due to excessive humidity.

The invention discloses a wet-friction-resistant nano generator and a fog water collecting and environment monitoring device.The wet-friction-resistant nano generator comprises a positive friction layer, a negative friction layer, a negative friction layer electrode and an external circuit, the negative friction layer is attached to the negative friction layer electrode, the positive friction layer is opposite to the negative friction layer in position, and the negative friction layer is attached to the negative friction layer electrode. The negative friction layer can be mutually contacted and separated, and is an F-MXene / fluorine-containing high polymer nanofiber membrane. According to the wet-friction-resistant nano-generator provided by the invention, the frictional electricity effect of the frictional nano-generator can be enhanced, relatively high output performance of the frictional nano-generator can be kept in a high-humidity and acid-base environment, the frictional electricity output voltage of the frictional nano-generator is changed along with a test environment, a good linear relation is shown, and the wet-friction-resistant nano-generator can be applied to the field of wet-friction-resistant nano-generators. The application potential of atmospheric environment monitoring is realized.

The invention discloses a bionic device for mist catching and water collecting, and relates to the technical field of water catching.The bionic device comprises a water collecting element, a humidity sensing element, a connecting element and a bionic mist catching element, the humidity sensing element is installed outside the water collecting element, a mist catching opening is formed in one side of the water collecting element, and the bionic mist catching element is installed in the mist catching opening; the two ends of the connecting element are connected with the humidity sensing element and the bionic mist catching element respectively, the humidity sensing element is used for sensing mist in the environment, the humidity sensing element can absorb water and deform, the bionic mist catching element is driven by the connecting element to open the mist catching opening, and the mist catching opening is closed. When the bionic mist catching element is started, collected water can be concentrated in the water collecting element, the humidity sensing element can lose water to reset, and the bionic mist catching element is driven by the connecting element to close the mist catching opening. The device is high in water collection efficiency, simple in structure and free of maintenance.

The utility model discloses an intelligent dust fog collecting device for a green construction site, which comprises a bottom plate, and the bottom surface of the bottom plate is fixedly connected with a support frame; the filter box is fixedly connected to the top surface of the bottom plate, a box cover is hinged to the top of the filter box, and a locking assembly is mounted on the filter box; the filtering mechanism comprises a mounting plate fixedly connected into the filtering box, a plurality of mounting holes are formed in the mounting plate in an array mode, mounting pipes are fixed in the mounting holes respectively, a plurality of air holes are formed in the mounting pipes in an array mode, and dust collecting cloth bags are detachably connected into the mounting pipes; the dust-containing gas supply mechanism comprises a gas extraction pipe; the dust falling assembly comprises a main pipeline fixedly connected to the outer wall of the filter box, a plurality of flow dividing pipes are fixed in the filter box at equal intervals, and the flow dividing pipes are communicated with the main pipeline; and the exhaust assembly is mounted at the bottom of the filter box. According to the utility model, dust falling is realized while the dust-containing gas is disturbed through the dust falling assembly, so that the dust collection efficiency is greatly improved.

This invention discloses a dust removal device for a grab bucket ship unloader hopper, comprising a hopper, a baffle plate fixedly installed on the hopper's inlet, multiple conical plates at the top of the baffle plate, a pair of baffles at the opening of the baffle plate with a hinged door, and each baffle's opposite end rotatably connected to the hopper's end face. First water storage and filter boxes are fixedly connected to both sides of the vertical baffle plate of the hopper, and a second water storage and filter box is installed on the side wall of the hopper facing the baffle plate. Spray nozzles are installed on the side of the conical plates facing the hopper, and a water supply pipe is connected between the spray nozzles and the first water storage and filter boxes. A first water pump is installed on the water supply pipe. A water mist collection device is installed on the inner wall of the side of the baffle plate facing the baffle plate, and the water mist collection device is connected to the second water storage and filter box via a conduit. A return pipe is connected between each first water storage and filter box and the second water storage and filter box, and a second water pump is installed on the return pipe. This invention can reduce water waste.

The invention relates to the technical field of water resource recovery, in particular to a photovoltaic power generation device capable of collecting sea fog, which comprises a sea fog collecting area, a conveying area, a photovoltaic area and a condensing area, a reverse osmosis membrane is arranged in the sea fog collecting area, the sea fog collecting area is divided into a collecting area and a temporary storage area by the reverse osmosis membrane, and the sea fog collecting area further comprises a sea fog collecting net arranged above the collecting area; the photovoltaic area is used for converting solar energy into electric energy; the condensation area is arranged on the back surface of the photovoltaic area; the conveying area is used for conveying water in the temporary storage area to the back face of the photovoltaic area, the inlet end of the conveying area is communicated with the temporary storage area, and the outlet end of the conveying area is arranged between the photovoltaic area and the condensation area. The sea fog is used for cooling the photovoltaic system, a complex seawater supply system is not needed, electrochemical corrosion and potential induced degradation are avoided, and efficient water and electricity cogeneration is achieved.

The utility model discloses a novel paint mist collecting and treating tower after paint spraying, which relates to the technical field of paint mist collecting and treating equipment and comprises an adsorption bin, a one-way valve air inlet pipe is mounted below the left side of the outer surface of the adsorption bin, adsorption liquid is filled in the adsorption bin, and a suction pump is fixedly arranged on the right side of the outer surface of the adsorption bin. Compared with an existing common paint mist collecting and treating tower, the novel paint mist collecting and treating tower after paint spraying has the advantages that gas carrying paint mist is injected into adsorption liquid to be fully mixed and adsorbed, the gas can rise, meanwhile, the suction pump can suck the adsorption liquid, the adsorption liquid is injected into the spraying ring through the conveying pipe to be sprayed, and a water mist barrier of the adsorption liquid is formed above the adsorption bin; further secondary adsorption treatment is conducted on paint mist which is not fully adsorbed in rising gas, the paint mist treatment quality is greatly improved, in addition, the adsorption liquid can be fully recycled in the mode, waste of the adsorption liquid is avoided, and the cost is reduced.

The invention is suitable for the technical field of wind power generation, and provides a combined type wind power generation device which comprises a base and a connecting block rotationally installed on the base. The tower pole is fixedly mounted at the top of the connecting block; the generator is mounted at the top of the tower pole and is used for wind power generation; the fan blades are arranged on the generator; the collecting nets are respectively arranged on two sides of the tower pole and are used for collecting sea fog; the water collecting tanks are respectively mounted at the bottoms of the collecting nets and are used for draining water in a centralized manner; the servo motor is fixedly installed on one side of the base and used for driving the tower pole to rotate and storing the fan blades, and an output shaft of the servo motor is fixedly connected with a rotating shaft of the connecting block. The combined type wind power generation device has the advantages that the function diversification of wind power generation and sea fog collection can be achieved, meanwhile, equipment can be stored in extreme weather to be prevented from being damaged, and the combined type wind power generation device is provided with multiple reinforcing and auxiliary supporting designs, so that the operation safety is guaranteed.

To provide a technique advantageous for more reliably recovering mist in a liquid coating apparatus.SOLUTION: A liquid coating apparatus for coating a substrate with liquid, comprises: a discharge unit configured to discharge droplets toward the substrate; and a mist collection unit configured to collect mist generated by discharge of the droplets from the discharge unit. The mist collection unit includes a suction flow path configured to suck the mist, and a liquid receiving unit configured to receive liquid generated by aggregation of the mist. The suction flow path includes a suction port configured to suck the mist, a discharge port configured to discharge the mist, an ascending flow path extending upward toward the discharge port, and an inclined flow path extending obliquely upward from the suction port toward the ascending flow path so as to merge with the ascending flow path. The liquid receiving unit is disposed below the ascending flow path.SELECTED DRAWING: Figure 3

The invention discloses a photovoltaic power generation irrigation system and method. The system comprises a photovoltaic assembly, a support, a water mist collecting device, an irrigation device and a control module. The photovoltaic assembly is fixedly installed on the support cross beam and used for supplying power to the irrigation device and the control module. The water mist collecting device is used for capturing fog drops in the air and converting the fog drops into liquid water, the water mist collecting device comprises multiple layers of fiber nets and collecting equipment, the multiple layers of fiber nets are installed on fiber net installation connectors below the support inclined struts, and the collecting equipment is used for collecting the liquid water converted by the water mist collecting device; the control module controls the irrigation device to extract liquid water with the target irrigation water amount from the collection equipment according to the received irrigation instruction; and the irrigation device extracts the liquid water of the target irrigation water amount and conveys the liquid water to the target irrigation area. In other words, water mist in the air is effectively utilized, the survival rate of plants in the arid region is increased, the residual space below the photovoltaic module is utilized, and the water mist collection cost is reduced.

The utility model discloses a kind of lacquer mist collection filtering structures, comprising: collection area, trolley, positioning mechanism, filtering assembly, collection area is ground structure, and with the air inlet and exhaust port of being communicated with spray booth, trolley can be displaced and set in collection area, positioning mechanism is set between trolley and collection area, positioning mechanism is used to position trolley at air inlet, filtering assembly is installed in trolley, and filtering assembly is used for lacquer mist filtering.Lacquer mist collection structure is changed from underground to ground structure, significantly reduce the civil engineering and equipment investment cost, avoid the inconvenience that worker needs to disassemble grid and drill into operation of operation ditch when replacing filtering assembly, so that disassembly and replacement process is more convenient and efficient, displaceable trolley cooperates positioning mechanism, ensure that filtering assembly is accurately and stably positioned at air inlet, effectively reduce the phenomenon of paint leakage, trolley can be integrally removed, and material replacement operation is not limited by space, significantly improve worker's working environment and work efficiency.