62results about How to "Comprehensive filtering" patented technology

The invention discloses a system log processing method and platform. The system log processing method includes the steps of having access to equipment generating system logs, collecting the system logs from the equipment, carrying out matching between the formats of the collected system logs and an appointed equipment template, determining corresponding equipment types of the system logs, filtering the system logs through an appointed key word template according to the equipment types of the system logs, sending a filtering result to a server side, and carrying out alarm processing on the system logs by the server side.

The invention relates to the field of medical wastewater treatment, particularly a medical wastewater three-stage treatment technique which comprises the following steps: a primary macroscopic impurity removal technique is performed, wherein the primary macroscopic impurity removal technique comprises sedimentation tank treatment, precipitation tank treatment and regulating tank treatment, and is used for macroscopic impurity removal; medical wastewater after the primary macroscopic impurity removal technique enters a secondary microscopic impurity removal technique, wherein the secondary microscopic impurity removal technique comprises water softener tank treatment, hydrolysis-acidification tank treatment, aeration biological tank treatment, electrolysis cell treatment and MBR (membrane bioreactor) tank treatment, and is used for microscopic impurity removal; and medical wastewater after the secondary microscopic impurity removal technique enters a tertiary disinfection discharge technique, wherein the tertiary disinfection discharge technique comprises secondary sedimentation tank treatment, disinfection tank treatment and discharge, and is mainly used for sterilizing and disinfecting the wastewater. The technique can remove different pollutants in the medical wastewater by using different treatment processes, and can implement efficient purification on the medical wastewater.

The invention relates to the technical field of concrete, in particular to a dust removing device for concrete processing. The dust removing device comprises a base and a pulverizer body and a dust removing box fixedly mounted on the left and right sides of the upper surface of the base by bolts. The pulverizer body is communicated with an air inlet pipe, the tail end of the air inlet pipe is communicated with the upper end of the dust removing box, a filtering assembly is fixedly mounted on the upper portions of the left and right inner walls of the dust removing box by screws, an exhaust pipeline is vertically communicated with the right side of a cover plate at the upper end of the dust removing box, the middle of the cover plate at the upper end of the dust removing box is communicatedwith an inlet main pipeline, and dust in the pulverizer body is sucked to the dust removing box by a fan through an intake pipe and can be preliminarily intercepted and filtered off by matching of ametal rubber filter screen and a nylon filter screen. At the same time, the residual dust in the air can be filtered again by means of a sprinkler, and the filter assembly can be rinsed.

The invention discloses a non-ferrous metal processing wastewater treatment device, which comprises an oxidation sedimentation tank and a filter stirring tank. The oxidation sedimentation tank and the filter stirring tank are connected through a No. 1 water pipe, and a water inlet pipe is provided on one side of the oxidation sedimentation tank. A flow meter is arranged on the water inlet pipe, a medicine box is arranged above the oxidation sedimentation tank, and a medicine outlet is arranged at the lower end of the medicine box. In the present invention, by connecting the oxidation sedimentation tank and the filtration and stirring tank through the No. 1 water pipe and the No. 2 water pipe, the water after the initial precipitation in the oxidation sedimentation tank can be introduced into the filtration and stirring tank through the No. 1 water pipe for stirring and filtering, and then the stirring The filtered water is introduced into the peroxidation sedimentation tank through the No. 2 water pipe, and the medicine is added for oxidation and neutralization, and then returned to the filter stirring tank for stirring and filtering, and the sewage purification effect is improved by repeated purification by using the oxidation sedimentation tank and the filter stirring tank Good, and at the same time, the structure is simple and the occupied area is saved.

The invention relates to filtering equipment, in particular to multistage sewage filtering equipment, which has the advantages of multistage filtering and comprehensive filtering. The multistage sewage filtering equipment comprises a frame body, a rubber plug, a discharging tube, a first valve, a first screen plate, sand, a first sealing bearing, a mounting plate, a motor, a first revolving shaft,blades, a feed hopper and the like, wherein the lower part of the right wall of the frame body is provided with a discharging hole; the rubber plug is inserted into the discharging hole; the discharging tube is arranged on the lower part of the left wall of the frame body; the first valve is arranged on the discharging tube; the first screen plate is arranged on the lower part in the frame body;and the sand is placed into the frame body on the lower part of the first screen plate. By adopting the multistage sewage filtering equipment, the effects of multistage filtering and comprehensive filtering are achieved; the blades are driven to rotate clockwise and anticlockwise through the clockwise and anticlockwise rotation of the first revolving shaft, so that sewage and a flocculant can be mixed better; the sewage can be filtered again with a second screen plate, so that the sewage can be filtered more comprehensively.

The invention discloses a method for improving the performance of dihydrate wet methods phosphoric acid reaction stuff, which comprises the following steps: Classify treating the stuffs by a classifier, the ardealite crystal size of classification bottom current is: the proportion of particles of +40 um size is 90%-95%, 100 um size is 50%-65%, +150 um size is 20%-35%. Filtering and washing the classification bottom current in a filter. The ardealite crystal size of classification overflow is: the proportion of particles of -40 um size is 80%-85%, -100 um size is 100%. Growing and increasing further have the classification overflow in a seed crystal reaction tank and entering the next classified cycle. Taking the ardealite filtrated and washed to the slag ground, and taking the diluted phosphoric acid to the storage tank, returning the preliminary filter liquid and 1st cleaning solution to the reaction tank, and quadratic countercurrent washing the 2nd cleaning solution in the filter.

The invention discloses a size mixing automatic filtering device for spinning. The filtering device comprises a dyeing tank filled with a coloring agent and a base. A group of horizontally distributedrotating sticks are arranged in the dyeing tank, and a cloth is wound under the rotating stick. The side wall of the dyeing tank is fixedly communicated with an outlet pipe and an inlet pipe. The upper end of the base is fixedly provided with a water inlet pump, a filter tank and a water outlet pump. The water outlet pipe is communicated with a water inlet of the water inlet pump through a waterpipe, and a water outlet of the water inlet pump is communicated with the filter tank through a water pipe. One side of the filter tank away from the water inlet pump is communicated with a water inlet of the water outlet pump through a water pipe, and a water outlet of the water outlet pump is communicated with the water inlet pipe through a water pipe. The upper end of the filter tank is provided with two insertion ports, a fixed frame is inserted into each insertion port, and the inside of the fixed frame is fixedly connected with a filter cloth. The automatic filtering device can filter the coloring agent comprehensively, and impurities can be cleaned conveniently.

The embodiment of the invention discloses a distributed self-learning abnormal traffic cooperative detection method and system, relates to the technical field of the Internet, and aims to filter moreabnormal traffic more comprehensively and reduce the false alarm rate of the system. The method comprises the steps of: classifying input traffic through a traffic classifier, and malicious traffic isscreened out; uploading the malicious traffic to a comprehensive management module; enabling the comprehensive management module to mark the malicious traffic reported by the analysis node to obtaina malicious traffic sample; enabling the comprehensive management module to classify the malicious traffic sample into a system sample library and issue the malicious traffic sample to a specified analysis node; enabling the specified analysis node to update a node sample library corresponding to the specified analysis node according to the malicious flow sample issued by the integrated managementmodule; and enabling the specified analysis node to train a weight model according to the updated node sample library through a weight training module to obtain an updated weight, and importing the updated weight into a traffic classifier. The method and the system are suitable for a large-scale distributed system.

The invention belongs to the technical field of preparation of drinks and in particular relates to a method for preparing dragon fruit liquid. The method comprises the following steps: selecting fresh dragon fruits, removing the peels, pulping and precooking; performing complex enzyme enzymolysis, wherein the complex enzyme refers to a mixture of cellulase, pectinase and pepsase; performing duplex filtration, clarifying, performing centrifugal separation, thereby obtaining the raw dragon fruit juice; and sterilizing by adopting UHT, and canning, thereby obtaining the dragon fruit liquid. According to the preparation method disclosed by the invention, the preparation process is simple, macromolecular substances are decomposed into small molecules by virtue of the enzymolysis process, and the nutritional ingredients of the prepared dragon fruit liquid are easily absorbed by the human body. Moreover, the dragon fruit liquid does not contain any additive, cane sugar is not manually added, and the requirements of people on low-calorie low-sugar drinks are met.

The present invention relates to a backlight module. It includes a cavity body formed from a first plate and second plate; a light source placed in the above-mentioned cavity body, the light emitted from said light source can be exited onto above mentioned backlight module by means of the above-mentioned second plate; and a light-filtering device placed on the above-mentioned second plete and used for filtering UV ray from light emitted by above mentioned light source.

The invention provides an indoor air detecting and purifying integrated machine. The indoor air detecting and purifying integrated machine comprises a shell body of which the interior is hollow. The bottom of the shell body is divided into a detecting cavity through a partition plate. A sensor assembly is installed inside the detecting cavity. A ventilation hole communicating with the interior of the shell body is formed in the partition plate. Air-inlet grilles are arranged on the two sides of the bottom of the shell body and communicate with the detecting cavity. A centrifugal fan is installed above the detecting cavity. An air-outlet grille is arranged on the top of the shell body. A filtering assembly is arranged between the centrifugal fan and the air-outlet grille. A display screen and a controller are further arranged on the surface of the shell body. The controller is in control connection with the sensor assembly, the centrifugal fan, the display screen, indicator lights and control buttons. According to the indoor air detecting and purifying integrated machine, the detecting function and the purifying function are integrated.

The invention discloses a security detection method, which is executed in computing equipment and comprises the following steps: receiving an installation package sent by a current client; obtaining ageneral white list and a custom white list, and generating a white list; decompiling the installation package to generate a source code file package; and traversing the source code file package, anddetermining a to-be-scanned file in the source code file package based on the white list so as to generate a risk statistics report after the to-be-scanned file is scanned. The invention further discloses a corresponding safety detection system. The security detection method provided by the invention is beneficial to improving the security detection efficiency of the installation package and greatly reducing the false alarm rate.

The invention discloses an efficient and automatic control sewage treatment system. The system comprises a first treatment tank, a second treatment tank, a third treatment tank, a collection device, an analysis device and a control device, wherein the control device is in communication connection with the collection device, the analysis device, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a detection device and a chemical falling valve; a first similarity S1 is pre-set in the control device; the control device is used for obtaining a similarity comparing result S through the analysis device; the S is compared with the S1; the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are controlled to move according to a comparing result instruction; a first organic matter content value Y1 and a second organic matter content value Y2 are pre-set in the control device; and the control device is used for obtaining third treatment tank organic matter content Y through the detection device, comparing Y with the Y1 and the Y2, and controlling the chemical falling valve and a fifth solenoid valve to move according to a comparing result.

The invention relates to a floor drain, in particular to a floor drain prevented from being blocked by fallen hairs. The floor drain is widely applied to bathrooms and hand washing sinks of families, hotels and barbershops and kitchens. The floor drain prevented from being blocked by the fallen hairs comprises a floor drain cover and a straight rod. The upper end of the straight rod is connected with the center of the floor drain cover, a stereo filter device with a certain thickness is arranged at the middle section of the straight rod, and the stereo filter device is a stainless steel wire ball. The floor drain prevented from being blocked by the fallen hairs is simple in structure and ingenious in concept, the stereo filter device is comprehensive in filtration, hairs and wires which flow into a pipeline along with water flow can be hung, blocking of the pipeline can be effectively prevented, filtering efficiency of the floor drain is improved, and life quality is improved; all parts are detachably connected, a sand collecting cup is convenient to clean regularly, and the stainless steel wire ball is convenient to replace regularly.

The invention discloses a drum type rotary filter which comprises a drum covered by a filter screen, wherein the drum is fixedly connected with a rotating shaft; the rotating shaft is arranged on and supported against a frame; the drum is driven through the rotating shaft to rotate; and a water tank for receiving filtrate is also supported against and arranged on the frame. By using the technical scheme provided by the invention, the filter can continuously work and has the advantages of low cost, quick filtration and good effect. The preferred technical scheme is that the edge of the drum is provided with a surrounding edge which extends outwards and has the beneficial effects that the surrounding edge and the filter screen form a sunken space for accommodating filtered liquid, so that the filtered liquid does not move towards the lateral wing. Another preferred technical scheme is that a cleaning device for washing filter residue on the filter screen is arranged on the lower side of the water tank and has the beneficial effects that the filter residue is completely separated from the filter screen and the filter screen can realize cycle operation.

The invention discloses a filter screen of the range hood. The filter screen comprises a mounting disc, a rim and a quality of blades; the mounting disc is suitable for being mounted on an output shaft of a motor; the rim is arranged around the mounting disc; and a quality of the blades are arranged between the mounting disc and the rim in a radial manner by taking the center of the mounting discas a circle center, the root part of the blade is arranged on the mounting disc, the end part of the blade is mounted on the rim, at least one blade and the projection of the root of the adjacent blade on the outer peripheral wall of the mounting disc are arranged at intervals in the axial direction of the mounting disc, or the projection of the end part on the outer peripheral wall of the mounting disc is separated from the axial direction of the mounting disc. The total area of the blades can be increased as much as possible, then the contact area between the oil fume and the filter screen is increased, therefore, the oil smoke can be filtered as much as possible, the range hood can be reduced to enter the range hood, when the motor is driven by the motor to rotate, the function of air supply and pressurization is achieved, and the oil fume suction effect can be ensured.

The invention discloses a system for single crystal furnace vacuum dedusting filtration, which comprises a safety inflation valve, a filtering tank cover, a filtering tank body, a honeycomb ultrafine fiber paper, an aluminium alloy inner cylinder, an air inlet and an air outlet; the open-type filtering tank cover is disposed on the filtering tank body; the safety inflation valve is disposed on the filtering tank cover; the aluminium alloy inner cylinder is disposed in the filtering tank body; the honeycomb ultrafine fiber paper is fixed on the aluminium alloy inner cylinder; the air outlet is disposed below the filtering tank body; the air inlet is disposed on the side surface of the filtering tank body. According to the invention, the honeycomb ultrafine fiber paper is used as a filtering medium to filter finer impurities, and the honeycomb structure can greatly increase the air passing area, and improve air passing efficiency. The invention has very important significance on the filtration of more and smaller impurities, the reduction of the vacuum pump oil using amount, the prolongation of the vacuum pump service life, and the improvement of the vacuum degree in the single crystal furnace.

The invention discloses an automatic screening magnetic ring ball mill. The automatic screening magnetic ring ball mill comprises a machine body, a discharge pipe and a discharge channel. A rotating motor is mounted on the top of the machine body. A ball milling barrel is mounted at one end of a connecting rod. The ball milling barrel is arranged in the machine body. The discharge pipe is fixed tothe bottom of the ball milling barrel. A solenoid valve is mounted in the discharge pipe. A base is arranged on the inner side of the bottom of the machine body. The outer side of the machine body isprovided with a discharge port. The discharge channel is mounted on the edge of the bottom of the machine body. One end of the discharge channel is connected with an abrasive particle barrel. The abrasive particle barrel is provided with containing grooves. Abrasive particle boxes are mounted in the containing grooves. An abrasive particle filter screen is fixed to the bottom of each abrasive particle box. The automatic screening magnetic ring ball mill automatically releases magnetic rings subjected to ball milling and abrasive particles through the solenoid valve and conducts automatic screening treatment on the magnetic rings and the abrasive particles through a magnetic ring filter screen and different sizes of the abrasive particle filter screens to facilitate collection.

The invention relates to the technical field of spray purification of UV paint and plastic paint and discloses a spray purification capture tower of UV paint and plastic paint. The spray purificationcapture tower comprises a tower cover. Ring frames arranged at equal intervals are fixedly connected between the inner side walls of the tower cover. Connection racks arranged at equal intervals are fixedly connected between the inner rings of the ring frames. S-shaped partition plates are installed at equal intervals between the bottoms of the multiple connection racks. The inner side wall in left or right of the tower cover is fixedly provided with three sets of fixed sleeves arranged at equal intervals. Each set of the fixed sleeves comprises two fixed sleeves. Circular tubes are fixedly connected between each set of the fixed sleeves. The outer surface of the circular tube is provided with a spraying mechanism in a ring. The bottom of the tower cover is provided with a through cavity.The existing UV paint production waste gas collection and treatment device has no obvious purification effect, low work efficiency and a low resource utilization rate. The spray purification capture tower achieves good treatment and purification effects and high work efficiency and saves water.

The invention discloses an environment protection device for exhaust gas treatment, including a machine body, wherein an exhaust pipe is installed at the top end of the machine body, and the exhaust pipe is located at the middle position of the top end of the machine body; the outer side of the machine body is provided with a motor box, a motor is arranged in the motor box, and the motor is located at the middle position in the motor box; one end of the motor is provided with a water pump, one end of the water pump is provided with a connecting pipe, and one end of the connecting pipe is provided with a water tank; the water tank is located at the bottom end in the machine body, the bottom end of the water tank is provided with feet, and the two ends of the water tank are provided with a connecting plate. The invention is mainly creative for the environmental protection industry; a dust box is arranged on the environment protection device, a dustproof plate is arranged on the dust box,and the gas inside the machine body can be further dust-proofed by the dustproof plate, thereby filtering the optimized gas more comprehensively and discharging the gas to the outside, the environment protection standards are met, and the pollution to the atmosphere is avoided.

The invention provides an anti-disaster purifying and water storing three-dimensional parking lot. The anti-disaster purifying and water storing three-dimensional parking lot comprises at least one parking layer located under a road and water draining ditches located on the two sides of the road, a water leaking device is arranged on the bottom face of the parking layer, and a water storing layeris arranged below the parking layer. The parking layer communicates with the water storing layer through the water leaking device, and the water storing layer communicates with the water draining ditches through pipelines. According to the anti-disaster purifying and water storing three-dimensional parking lot provided by the invention, the underground parking space can be sufficiently utilized, flexible use is achieved, resource waste is avoided, and the excellent water storing function is achieved. Through the water draining ditches provided by the anti-disaster purifying and water storing three-dimensional parking lot, water draining, purifying and water storing can be effectively conducted, so that waterlogging can be prevented when a rainstorm occurs, the structure is simple, the costis low, clearing is easy, it is ensured that stored water is not deteriorated, the national regulation requirement is met, the basic functions of flood detention and peak clipping are achieved, the anti-disaster purifying and water storing three-dimensional parking lot can completely prevent a disaster, and various use water can be provided in a dry season.

The invention discloses a sewage purification treatment device for water treatment engineering. The invention relates to the technical field of sewage treatment devices. The device specifically comprises a filtering tank and a sterilizing tank assembly, and the top of the filtering tank is connected with a feeding mechanism; an activated carbon fiberboard is distributed in the filtering tank; a quartz sand plate is arranged on one side of the activated carbon fiber plate, fixing bolts penetrate through the periphery of the activated carbon fiber plate and the periphery of the quartz sand plate, a tank cover is connected to one end of the filtering tank, sealing bolts penetrate through the periphery of the tank cover, a water delivery pump is connected to the bottom of the filtering tank, and the sterilization tank assembly is connected to one end of the water delivery pump. According to the sewage purification treatment device for water treatment engineering, a flow dividing pipe is atransparent glass pipe and is spirally distributed on the periphery of a center column, filtered sewage is divided into the flow dividing pipe to be irradiated by ultraviolet rays of an ultraviolet sterilization lamp, and thus the sterilization effect is achieved; the arrangement is beneficial for improving the ultraviolet transmittance, comprehensively irradiating water in the flow dividing pipe,improving the sterilization effect and shortening the time needed by sterilization.

A method for purifying Apo A-l is provided including the steps of providing a solution comprising Apo A-l and guanidine hydrochloride and filtering the solution through a filter having a pore size in a range from 15 nrn to 35 nm to thereby reduce viral contamination of the Apo A-l. An Apo A-f preparation is provided having at least a 12 log LRV (log reduction value) for a parvovirus; and / or at least 9 log LRV for a non-enveloped virus; and / or at least 8.5 log LRV for a lipid enveloped virus. Also provided are pharmaceutical compositions and reconstituted high density lipoprotein formulation comprising Apo A-l and methods of treating diseases disorders or conditions.

The invention belongs to the technical field of preparation of beverages and particularly relates to a preparation method of lychee juice. The method comprises the following steps: selecting fresh lychees, washing, peeling off, removing kernels and pre-boiling, adding ion water and adjusting the pH value, raising the temprature, carrying out enzymolysis, pulping, carrying out duplex filtering, clarifying, centrifuging and separating, and adjusting the sugar degree and pH value; and sterilizing by UHT and filling to prepare the lychee juice. The method has a simple process and low equipment cost; macromolecular substances are decomposed into micro-molecules by an enzymolysis process; nutritional ingredients of the prepared lychee juice are easily absorbed by a human body; and any additive is not added so that the requirements on healthy beverages by people are met.

The invention discloses a high-efficiency waste gas treatment device of a wooden furniture processing spray booth, and relates to the technical field of processing of wooden furniture. The high-efficiency waste gas treatment device comprises a waste gas treatment device body, wherein the waste gas treatment device body comprises gas extraction pipes, a first treatment chamber, a filter chamber, asecond treatment chamber, a gas suction machine, a dust removal box and a waste slag chamber, wherein one end of each gas extraction pipe is fixedly connected with the upper side of one end of the first treatment chamber. According to the high-efficiency waste gas treatment device of the wooden furniture processing spray booth, on one hand, the two gas extraction pipes can suck waste gas in the spray booth at the same time to improve the working efficiency of the waste gas treatment device; on the other hand, the first treatment chamber and the second treatment chamber can treat the waste gastwice, so that the waste is cleaner; then the air suction machine and the dust removal box can be detached randomly, so that a worker can select whether to install or not install the air suction machine and the dust removal box according to a requirement; in addition, three filter nets can filter impurities and harmful substances in the waste gas more comprehensively.

The invention provides a desulfurization system for magnesium metal smelting, and belongs to the technical field of desulfurization. The desulfurization system comprises a machine body, supporting blocks, an air inlet and a water inlet, wherein the supporting blocks are arranged at the lower end of the machine body and are fixedly connected with the machine body; the air inlet is formed in the upper end of the side surface of the machine body, and the air inlet is fixedly connected with the machine body; the water inlet is formed in the lower end of the side surface of the machine body, and the water inlet is fixedly connected with the machine body; and an exhaust fan is arranged at the upper end of the machine body, and the exhaust fan is fixedly connected with the machine body. Accordingto the desulfurization system for magnesium metal smelting, through the improvement of the structure, when the device is in actual use, heat dissipation can be effectively carried out, so that the internal device is not prone to failure due to overheating after being used excessively, and then the device cannot stop running due to the failure to waste time; and the desulfurization system for magnesium metal smelting can effectively filter the exhausted gas, so that the gas exhausted by the device cannot influence the external environment and the air, and the practicability is high.

The invention discloses an auxiliary treatment device for roller coating waste gas of a four-color pre-roller coating aluminum coil. The auxiliary treatment device comprises a box body, a first-stage filtering mechanism, a second-stage filtering mechanism, an adjusting mechanism, an ultraviolet light degradation mechanism, an activated carbon adsorption mechanism, a gas inlet pipeline, a gas exhaust pipeline and a return pipeline, wherein the gas inlet pipeline and the gas exhaust pipeline are arranged at the two ends of the box body respectively; the first-stage filtering mechanism, the second-stage filtering mechanism, the adjusting mechanism, the ultraviolet light degradation mechanism and the activated carbon adsorption mechanism are arranged in the box body; the return pipeline is arranged on the outer side of the box body and is connected with the adjusting mechanism and the first-stage filtering mechanism; the first-stage filtering mechanism is arranged at one end of the box body; the second-stage filtering mechanism is arranged between the first-stage filtering mechanism and the adjusting mechanism; the activated carbon adsorption mechanism is arranged at the other end of the box; and the ultraviolet light degradation mechanism is arranged between the activated carbon adsorption mechanism and the adjusting mechanism. The device is fine in structure, can well control the air speed and the air volume, and enables waste gas treatment to be more thorough.

The invention provides a drainage ditch, which includes a first drainage area and a second drainage area connected from top to bottom, the width of the first drainage area gradually decreases from top to bottom, and the top surface of the first drainage area It is open and the top surface is provided with a rainwater grate, the width of the second drainage area gradually decreases from top to bottom, and the second drainage area is provided with a bottom surface. The drainage ditch provided by the present invention ensures that the water volume is sufficient to flow during light rains to carry away sediment and garbage, and the width is sufficient to accommodate a large amount of rainfall during heavy rains so as not to overflow to the outside of the ditch. The gutter can effectively drain, purify, and prevent stagnation of rainwater, is easy to open and clean, has a simple structure, low cost, is easy to clean, and meets the requirements of national regulations.

The invention discloses an air port type biological exhaust efficient filtering device which comprises a workbench, a flow collecting cover, a flow guiding device, a circulation monitoring device and a filtering device, the flow collecting cover is arranged on the bottom table top of the workbench, the flow guiding device is installed at the lower end of the flow collecting cover, and air on the bottom table top of the workbench is continuously extracted in real time; the circulation monitoring device is installed at the upper end of the flow collecting cover, the filtering device is installed in the circulation monitoring device, air from the drainage device is filtered through the filtering device, the filtered air is transmitted to the circulation monitoring device to be filtered and detected again in real time, and the filtered air flows back to the filtering device to be circularly filtered.