135results about How to "Play a role in purification" patented technology

The invention discloses an industrial drying machine capable of drying uniformly, and relates to the technical field of drying machines. The Industrial drying machine capable of drying uniformly comprises a base; a control device is mounted on the left side of the base; mounting seats are symmetrically arranged on the left side and the right side of the top of the base; an outer shell is mounted in the central position of the top of the base; a heat insulating layer is arranged in the inner cavity of the outer wall of the outer shell; sterilizing lamps are arranged on the left side and the right side of the top of the inner cavity of the outer shell; supporting rods are symmetrically arranged on the left side and the right side of the bottom of the mounting plate; vibration reducing grooves which are matched with the supporting rods are symmetrically formed in the left side and the right side of the top of the bottom plate; an inner cylinder is driven to rotate through a motor, and then hot air enters into and exits from the outer shell by adopting an air blower and a heating device to dry the clothes in the inner cylinder; the rotating of the inner cylinder can not only achieve a dehydrating effect, but also dry the clothes more uniformly; the base is provided with the vibration reducing grooves and springs, so that the drying machine operates more stably; and the service life of the drying machine is also prolonged.

The invention discloses a preparation method for a proton exchange membrane fuel cell catalyst. The adoption of a surfactant and a stabilizer is avoided, the preparation method is easy to operate, safe and convenient, and the preparation efficiency is greatly improved; acid is added as a precipitant, so that the precipitation time of the catalyst is greatly shortened, and the process efficiency is improved; a drying process of the catalyst is rapidly finished by a spray drying technology, and materials sprayed in the drying process are instantaneously heated by high temperature only when being sprayed into spray particles, so that the phenomenon of agglomeration of the catalyst is reduced, and the electrochemical activity of the platinum-carbon catalyst is kept high after the catalyst is dried; moreover, by the spray drying technology, the preparation time of the catalyst is further reduced, and the preparation method is easy to realize industrial production, and has broad market prospect.

The invention relates to a preparation method of a composite refining agent of an aluminum alloy, and belongs to the technology field of refining agent. The composite refining agent of the aluminum alloy prepared by the invention comprises chloride, fluoride and nitrate, wherein the chloride is the main component of the refining agent with high hygroscopicity; sodium chloride and potassium chloride have good coverage performance and are the basis of the refining agent; hexachloroethane is easy to store, easy to use, has a good purifying effect, and has a grain refining effect; since the loosehexachloroethane and aluminum alloy liquid will react violently, the hexachloroethane and sodium fluorosilicate are pressed together and granulated to improve the purification effect of the hexachloroethane; sodium fluoride can cause the oxide film to mechanically fall off and dissolve in the solvent, thereby playing a purifying function ; the addition of fluoride in the refining agent has an effect of adsorbing and dissolving aluminum oxide; the fluoride accelerates the process of adsorbing hydrogen and inclusions in an aluminum liquid by the refining agent, promotes the migration of the inclusions to the interface and improves the efficiency of the inclusion removal.

The invention relates to a preparation method for tilmicosin phosphate. The preparation method for the tilmicosin phosphate comprises the following steps: completely mixing a tilmicosin solid and an organic solvent I; heating, dissolving and filtering; adding a phosphoric acid aqueous solution into filtration; completely stirring till the solution is salified; cooling to room temperature, slowly adding an organic solvent II dropwise while stirring till complete crystallization, and performing centrifugal separation; performing drip washing on the solid by using the cold organic solvent II for 2 to 3 times; drying the solid to obtain a tilmicosin phosphate solid. According to the preparation method of the tilmicosin phosphate, the tilmicosin is dissolved into solvents such as methanol, ethanol, acetone, dichloromethane and ethyl acetate and then is salified together with phosphoric acid in the organic solvent, so the aims of removing insoluble impurities and purifying products are realized and water-soluble impurities in the products are avoided; crystallization is performed according to different solubility of the tilmicosin phosphate in solvents such as butyl acetate, ethyl ether or petroleum ether to prepare the tilmicosin phosphate solid, so that the method is simple and convenient, and easy to operate; production is realized easily, the final yield reaches above 90 percent, and the purity reaches above 97 percent.

A disclosed gas purifying apparatus for pyrolyzed biomass fuel comprises a purification box, two separation plates are arranged in the purification box, and the internal space of the purification box is divided into a first chamber, a second chamber and a third chamber from left to right by the two separation plates; the top of the first chamber is provided with an atomization rotation nozzle; the second chamber is inside provided with a breather pipe, the other end port of the breather pipe stretches into a base solution filling the bottom of the second chamber and has a distance of 7-18 cm to the solution level; and the top of the third chamber is provided with a rotation atomization nozzle. By employing the three chambers, an acidic gas in a mixed gas can be successively purified from left to right, so that the gas purifying apparatus gives play to multiple purification effect, and is capable of relatively thoroughly completely purifying the acidic gas.

The invention relates to a sewage treatment device and in particular relates to a multi-grade purification treatment device for sewage treatment. Aiming at solving the technical problems, the invention provides the multi-grade purification treatment device for the sewage treatment, which has the characteristics that sewage can be effectively treated and the whole cost of equipment is not high. Inorder to solve the technical problems, the invention provides the multi-grade purification treatment device for the sewage treatment; the multi-grade purification treatment device comprises a mountingframe and the like; the right end of the upper part of the mounting frame is connected with a top plate; a filtering mechanism is arranged at the top of the lower part of the top plate; a stirring mechanism is arranged at the lower part of the top plate; a stirring box is arranged at the lower part of the mounting frame; the lower part of the stirring mechanism is located in the stirring box. Byadopting the multi-grade purification treatment device, the effects that the sewage can be effectively treated and the whole cost of the equipment is not high are realized; the filtering mechanism isarranged so that sewage can be primarily filtered; the stirring mechanism is arranged and the sewage and a sewage mixture react sufficiently, so that the effect of purifying the sewage is realized.

The invention discloses an air treatment device, an air conditioner indoor unit with the same and an air conditioner outdoor unit. The air treatment device comprises a shell, a guide fan and a water treatment module, the guide fan and the water treatment module are arranged in the shell separately, the shell is provided with an air inlet and an air outlet, the shell is internally provided with anair treatment air flue, the water treatment module comprises a water container and a centrifugal water throw-off part, and at least one part of the centrifugal water throw-off part stretches into thewater container and can form a water curtain in the air treatment air flue. According to the air treatment device, the water treatment module comprises the water container and the rotatable centrifugal water throw-off part, and the centrifugal water throw-off part can make the water in the water container form the water curtain in the air treatment air flue through rotation of the centrifugal water throw-off part by means of the effect of centrifugal force. Indoor air can penetrate through the water curtain when circulating in the air treatment air flue, water molecules in the water curtain can adsorb dust, dust particles and the like in the indoor air and make the dust, dust particles and the like in the indoor air blended in water, and then the indoor air can be purified.

The invention relates to a method for detecting 9 kinds of mycotoxins in a cassia seed medicinal material. The method comprises the following steps: a step 1: preparation of a standard substance stocksolution; a step 2: preparation of a mixed standard substance stock solution; a step 3: preparation of a standard working solution; a step 4: preparation of a tested object solution; a step 5: preparation of a substrate matching standard solution; a step 6: determination.

The invention belongs to the technical field of organic synthesis and particularly relates to a synthetic method of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride, comprising the steps of (1) thermally oxidizing 4,4'-(hexafluoroisopropylidene)di-o-xylene under the action of potassium permanganate to obtain hexafluorotetracid; (2) adding the hexafluorotetracid into a mixed solvent of xylene and acetic anhydride, heating and stirring, and post-processing after reaction is over. Less potassium permanganate is added in the oxidizing reaction with less frequency, reaction time is shortened, and operation steps are simplified; the use of inorganic bases is avoided, oxidizing property of potassium permanganate can be improved, and the cost is reduced; dehydration process is modified, reaction temperature is lowered, reaction time is shortened, and hexafluorotetracid can be more efficiently converted into hexafluorodianhydride, with the purity up to 99.5%.

The invention belongs to the field of biotechnology, in particular to a culture medium and a cultural method for endometrial stem cells. The culture medium provided by the invention comprises a serum-free medium, a blood platelet lysate, N-acetylcysteine, galacturonic acid and an antibiotic. The culture medium and the cultural method for endometrial stem cells provided by the invention are used for solving the technical defects of low value increase efficiency of the endometrial stem cells, low cell quality and easy differentiation caused by existing culture medium culture.

The invention relates to a mattress, in particular to a graphene biological diatom sponge mattress. The graphene biological diatom sponge mattress comprises a mattress body and a cover surface fixed outside the mattress body; the mattress body comprises a skin-friendly layer, a graphene biological diatom sponge layer, a common sponge layer and an elastic layer; the skin-friendly layer is arrangedat the topmost end of the mattress body; the elastic layer is arranged at the lowermost end of the mattress body; the common sponge layer is arranged between the skin-friendly layer and the elastic layer; the graphene biological diatom sponge layer is arranged at the upper end and / or the lower end and / or the side surface of common sponge; the thickness of the graphene biological diatom sponge layer is 0.5 to 15cm. The graphene biological diatom sponge mattress has the advantages that negative ions and far infrared rays can be released; mites and bacteria can be killed; certain physical therapyand health care effects are achieved on the human body.

A molten metal reduction release agent belongs to a chemical release agent, especially a reduction release agent for manufacturing the molten metal in the electronic products. The molten metal reduction release agent comprises 55-65 portions of phosphate polyoxyethylene nonyphenol by weight, 30-40 portions of amammonium dihydrogen phosphate by weight and 2-8 portions of ammonium citrate tribasic by weight. The invention has the advantages of high reduction efficiency, innocuity, no cancerogenic substance, little smoke and neutral pH value noncorrosive to the machines. The molten metal reduction release agent can clean the excessive release metal and oxidation impurities on the tin surface in the tin furnace for purification, reacts with the carbonization welding flux in a high temperature furnace, enhances the reduction and releases out the metal elements. The residues are water-soluble and capable of degrading without pollution. Thereby, the invention can improve the electronic product quality, saves energy and decreases consumption.

The invention discloses a special organic waste gas purification device for a pipeline of a laboratory ventilation cabinet. The special organic waste gas purification device comprises a waste gas collection system, a waste gas treatment system and a waste gas emission system which are connected sequentially; the waste gas treatment system consists of an air inlet, a purification cabinet and an air outlet; the air inlet is formed in the left lower side of the purification cabinet and connected with the waste gas collection system, the air outlet is arranged on the right side of the purification cabinet and is connected with the waste gas emission system, the purification cabinet is cuboid and has a hollow interior; a deflector plate, a photocatalytic oxidization module and a honeycomb activated carbon adsorption module are arranged in the purification cabinet; the deflector plate is a one-fourth circularly arc-shaped steel plate with the radius of 130mm, the length of the deflector plate is equal to the depth of the purification cabinet and is fixedly arranged on the inner side of the purification cabinet. The device has a simple and reasonable structure, is easy to process and convenient to use, and can effectively purify various waste gases in a laboratory, thus being wide in application range and low in adsorption cost.

The invention belongs to the field of doors / windows and particularly relates to a dedusting screen window with a temperature adjusting function, comprising a window frame. Two rotary shafts horizontally arranged with one above the other are fixedly connected inside the window frame; the two rotary shafts are positioned in a same vertical plane; a drum is rotationally connected to each rotary shaft; a screen tape is wound around the two drums and is composed of first and second screen strips equal in length; the first screen strip is evenly provided with a plurality of first air holes; the second screen strip is evenly provided with a plurality of second air holes; the first air holes are greater than the second air holes in diameter; a dedusting mechanism is arranged between the two rotaryshafts. The screen tape herein can be rotated to adjusting flow speed of air, so that certain temperature adjusting effect is achieved; an electrostatic vertical plate can attract dust in air, thereby removing dust and providing purifying.

The invention discloses a construction method of removing silt in an irrigation canal. The construction method comprises the following steps that 1, concrete is prefabricated; 2, a foundation groove is excavated; 3, a canal is installed; 4, silt is cleared, and 5, soil is recycled. According to the method, the problems that water quality is poor, a water body is muddy, a large amount of the silt and precipitates can be deposited at the bottom in an existing canal are solved.

The invention discloses A surface float device for an underwater work robot which includes a first floating plate, Glove compartments, fixing rods and nylon mesh, An upper end of that first float plate is provided with a culture plate, the outer ring of the connecting rod is wound with a telescopic spring, the storage box is installed on the right side of the culture plate, A support column is arrange between that culture plate and the storage box, the surface of the culture plate is provided with a culture groove, the right end of the first floating plate is connected with a second floating plate, quartz sand is arranged inside the fixing box, both sides of the fixing box are provided with air valves, A surface float device for an underwater work robot is movably connected with a cultureplate under that action of a first clamping groove, Avoid the traditional integral structure to prevent the area is too large to be easily washed away by the waves, which is conducive to maintaining the stability of the culture plate. The expansion spring can reduce the impact force between the culture plates, which is conducive to damping and buffering the centripetal force between the culture plates.

The invention discloses a waste-gas treating device of a waste-plastic recycling system. The waste-gas treating device comprises a gas collecting hood, a purifying box and a treating box, wherein thegas collecting hood is communicated with the bottom side of the purifying box by a gas delivery pipe; the inner wall of the purifying box, corresponding to a part above the gas delivery pipe, is provided with a blocking ring; a flow-limiting pipe is arranged on the upper surface of the blocking ring; through holes are uniformly formed in the surface of the flow-limiting pipe; a baffle plate is arranged at the top part of the flow-limiting pipe in a covering manner, and the flow-limiting pipe is arranged at the inner side of the edge of the baffle plate; a circulating water pump is arranged atthe outer side of the bottom part of the purifying box; one end of the circulating water pump is communicated with the bottom part in the purifying box by a pipeline. The waste-gas treating device disclosed by the invention has the beneficial effects that by arrangement of the baffle plate and a flow-limiting plate, waste gas passes through a flow-limiting drum to reach the bottom part of the baffle plate; convex blocks at the bottom part of the baffle plate can adsorb particles in the waste gas.

The invention relates to the technical field of automobile exhaust treatment, and discloses a purification treatment device for automobile exhaust. The purification treatment device comprises a shell,a shock pad is fixedly connected to the middle of an inner cavity of the shell, a three-way catalytic layer is fixedly connected in the shock pad in a sleeved manner, and a hot air turning ball is movably connected to the position, located on the right side of the three-way catalytic layer, of the inner cavity of the shell in a sleeved manner. According to the purification treatment device for the automobile exhaust, through cooperation of a pushing device, a turning device and a deposited carbon removing device, when the exhaust is exhausted from a gas inlet hole in the right side of the shell, the pressure intensity of the left side of the deposited carbon removing device is smaller than that of the right side of the deposited carbon removing device at the moment, for the exhaust, an upper scraping hemisphere, a lower scraping hemisphere, a strip-shaped scraping piece fixedly installed in a transverse ventilation groove and a carbon collecting bag can conveniently scrape deposited carbon adhering to the lower scraping hemisphere and the upper scraping hemisphere, a limiting pipe rotates around a360-degree curved rail clamping strip on a linkage column, the deposited carbon is effectively removed, meanwhile, catalytic activity of the three-way catalytic layer is maintained, and the environment is protected.

The invention relates to the technical field of household appliances and equipment and particularly relates to a humidifier refrigerator. The humidifier refrigerator comprises a refrigerator body, a water pan, a hydrophilic material block and an air outlet, wherein the refrigerator body is provided with a refrigerator press bin in which a condenser and a condenser fan for cooling the condenser are arranged, the air outlet direction of the condenser fan faces to the condenser, and an air inlet is formed beside the condenser fan; the water pan is arranged in the refrigerator body and in the air outlet direction of the condenser fan and is communicated with a drain pipe of the refrigerator body; the hydrophilic material block is fixedly arranged in the water pan; and the air outlet is formed in the refrigerator press bin and beside the hydrophilic material block. The existing resource of the refrigerator is sufficiently utilized; and due to the arrangement of the water pan and the hydrophilic material block, the function of a humidifier is achieved, the material for additionally producing a humidifying device is saved, and the energy consumption is reduced.

The invention proposes a method for producing a lithium ion battery negative electrode material by an asphalt secondary coating process. By the method, the problem that the electrochemical performanceof the lithium ion battery negative electrode material in the prior art is solved. The method comprises the following sequential steps of S1, mixing needle coke after being smashed and asphalt powderwith grain size being 20-40 micrometers for 20-30 minutes by a mixing machine to obtain a mixture A; S2, performing surface modification and fusion on the mixture A to obtain a primary asphalt coating material, allowing the primary asphalt coating material to enter a furnace for high-temperature graphitization at 800 DEG C under protection of high-pure N2, and cooling to a room temperature to obtain a material B; S3, smashing and classifying the material B, and mixing the material and asphalt powder with grain size being 2-5 micrometers again for 30-40 minutes by the mixing machine to obtaina material C; and S4, fusing the material C to obtain a secondary asphalt coating material, sending the secondary asphalt coating material to another one furnace for high-temperature carbonization at3,000 DEG C under protection of high-pure N2, and removing tar contained in the material C, thereby obtaining the lithium ion battery negative electrode material.

The invention relates to a diatomite forming composition with hygroscopic and deodorization functions and a preparation method thereof. The diatomite forming composition is prepared from the following components in percentage by weight: 5% to 40% of diatomite, 5% to 20% of tourmaline powder, 1% to 5% of inorganic cleaning agent, 0.1% to 1.0% of acrylic resin adhesive, and the balance of gypsum powder; the inorganic cleaning agent is composite powder prepared by attaching precious metal catalysts to layered inorganic functional materials. According to the diatomite forming composition with the hygroscopic and deodorizing functions and the preparation method thereof, the diatomite forming composition can effectively eliminate harmful gases when the concentration of harmful aldehydes, ammonia and benzene gases is relatively low, instant effectiveness is good, and the purpose of purification in a short time can be achieved; the diatomite forming composition has a relatively strong adsorption capacity of moisture and a strong hygroscopic effect; the diatomite forming composition has a simple production process and a strong purification effect, and is easy to industrial production.

The invention discloses a fragrance emitting LED lamp which comprises a cooling cavity, a fan cavity, a cooling fan and a drive motor. The fan cavity is fixedly connected to the upper side of the cooling cavity, the cooling fan is arranged in the fan cavity, the drive motor is arranged above the cooling fan, two fragrance cavities are respectively arranged in two sides of the cooling cavity, an LED substrate is arranged in the cooling cavity, cooling fins are arranged above the LED substrate, a current stabilizer is arranged on one side of the cooling cavity, a temperature control module is arranged on the other side of the cooling cavity, and a temperature sensor electrically connected with the temperature control module is arranged on one upper side of the cooling cavity. The fragrance emitting LED lamp is simple in structure and novel in design, the cooling fan can be automatically turned on or off according to the temperature inside the cooling cavity so as to achieve the cooling operation of the lamp with higher efficiency by the arrangement of the temperature control module and the temperature sensor, the service life of the lamp is prolonged, and meanwhile, energy-saving andenvironmental protection characteristics are achieved.

The invention provides a liquefied natural gas filtering device which includes a main chamber. A liquid inlet is arranged on the top of the main chamber and a liquid outlet is arranged on the bottom of the main chamber. A liquid guide plate is arranged on the upper end surface in the main chamber. A primary filter screen is disposed in the main chamber. A secondary filtering plate is arranged below the primary filter screen and a third filtering plate is arranged below the secondary filtering plate. A gas outlet is arranged in a side end surface of the main chamber and is provided with a tightening screw. A first electromagnetic filter and a second electromagnetic filter are disposed under the third filtering plate, wherein the bottoms of the first electromagnetic filter and the second electromagnetic filter are connected to an activated carbon adsorption plate.

The invention relates to an intelligent clothes care machine which comprises a box (1) and a sliding door (2) installed on the box (1). A supporting board (101) is vertically installed at the portion, close to a left side board or a right side board, in the box (1). An air duct is formed between the supporting board (101) and the left side board or the right side board of the box (1). The supporting board (101) does not make contact with a top board and a bottom board of the box (1). A far infrared generation device (102) is installed on the face, facing the left side board or the right side board of the box (1), of the supporting board (101). By the adoption of the intelligent clothes care machine and a control method of the intelligent clothes care machine, use is convenient and multiple functions are achieved.

The invention provides a vermiculite-kieselguhr compounded water absorption foot pad and a preparing method thereof. The vermiculite-kieselguhr compounded water absorption foot pad is prepared from, by weight, 40-70 parts of kieselguhr, 10-25 parts of expanded vermiculite, 15-30 parts of calcium hydroxide and 5-20 parts of wood pulp fibers. The vermiculite-kieselguhr compounded water absorption foot pad has the advantages of being super-high in water absorbing capacity, quick in moisture discharging and drying performance, resistant to pest, corrosion and mould and the like, is of a firm and stable layer-net porous structure, and has the powerful adsorption purification performance, dust, particles, viruses, hazardous substances and peculiar smells floated in air can be absorbed and decomposed, and therefore the air purifying effect is achieved. According to the preparing method of the foot pad, the structure of the product prepared with the method is of an interconnecting and engaging structure like a spider web, countless micro holes are formed in the product, and compared with the raw material, the absorption effect of the product is enhanced, and the product has the advantages of being convenient, simple, easy to operate and the like, and is suitable for mass production and wide application.

The invention discloses a method for separating high-content carnosic acid from rosemary, which comprises the following steps: 1) extracting dried rosemary leaves by using continuous countercurrent extraction equipment, adding auxiliary materials for decolorization, discharging the extracting solution from a liquid outlet, carrying out coarse filtration and fine filtration to obtain a filtrate 1, carrying out vacuum concentration on the filtrate 1 in a concentration tank, standing and cooling, and filtering to obtain paste A; 2) dissolving the paste A in an extraction tank by using an acid-added organic solvent, filtering to obtain a filtrate 2, adding vegetable oil accounting for 1 / 6-1 / 2 of the mass of the paste A into the filtrate 2, concentrating under reduced pressure until no solvent drips, and standing to obtain an insoluble substance B; and 3) carrying out degreasing treatment on the insoluble substance B to obtain a product C, namely the high-content carnosic acid.

The invention discloses a gas filtration device for paint production. The device structurally comprises a gas inlet, a main filtering machine, an operation panel, a box door, a purified gas outlet andsupporting legs, wherein the gas inlet is fixedly mounted at the head end of the main filtering machine, the operation panel is arranged on the front surface of the main filtering machine and is electrically connected through a wire, gas is sucked into a filtering plate through a gas inlet mechanism, the filtering plate preliminarily adsorbs particles, an agent spraying mechanism sprays an agentto gas, so that an agent and harmful substances in gas are mixed, the harmful substances are liquefied, gas is purified at the same time, a wall scraping mechanism is used for clearing the surface ofthe inner wall of the agent spraying mechanism, normal use of the agent spraying mechanism can be ensured, a liquid enters an evaporation mechanism for stirring evaporation after being formed, the evaporation effect is better, the harmful substances are more thoroughly purified, a negative-ion generator is used for final purification, and some harmful substances difficult to tackle are purified clean.

The invention discloses intelligent non-negative pressure water supply equipment capable of achieving remote communication. A flow stabilizing tank is fixedly installed at one end of the top of a base, a water inlet pipe is fixedly connected to one end of the top of the flow stabilizing tank, a water outlet pipe is fixedly connected to the middle of the bottom of the flow stabilizing tank, a transverse water distribution pipe is fixedly connected to one end of the water outlet pipe, and a water softening mechanism is fixedly installed at one end of the transverse water distribution pipe. After water enters a softening box through a connecting branch pipe and a water inlet control valve, sodium ions in an ion exchange resin plate can exchange with calcium and magnesium ions in the water, so that the calcium and magnesium ions in the water are fully absorbed by the ion exchange resin plate, the calcium and magnesium ions in the water are reduced, the water is softened, the quality of the water and the drinking taste of the water are improved, a user cannot scale when using water resources, the probability that a water boiling device is blocked and damaged is reduced, and the situation that water cannot flow normally due to the fact that water scale appears on the inner wall of a water pipe or in a pressurizing pump after the pressurizing pump is used for a long time is avoided.

The invention relates to a high-efficiency air purifier for a wood processing workshop. The high-efficiency air purifier for the wood processing workshop comprises a body, a first air outlet, first air inlets, moving wheels, a fan, a pipeline, a detecting mechanism and a purifying mechanism; the detecting mechanism comprises a first driving component, a detecting component, a first connecting rod,a second connecting rod, a guide rail, a third connecting rod and a first moving block; the purifying mechanism comprises an outer shell, a second air outlet, a second air outlet, a filtering element, a collecting tank, a gear rod, a piston, a first transmission rod, a second driving component and a cleaning component. According to the high-efficiency air purifier for the wood processing workshop, the content of wood dust in air at various positions in the workshop can be detected through the detecting mechanism, so that the air purifier can perform purifying aiming at the position with highcontent of the wood dust, and the purifying effect of the air purifier is improved; the filtered wood dust in the air purifier can be collected through the purifying mechanism, so that the recycling and utilizing of the wood dust are realized, and the utilization rate of wood is improved.

The invention discloses a centralized driving type multi-pass nonferrous metal rolling mill. The centralized driving type multi-pass nonferrous metal rolling mill comprises a rolling mill body, a rolling mill safety hood, a gear box and a motor, a main rotating shaft is rotationally installed in the gear box, a first transmission straight gear is fixedly arranged on the main rotating shaft in a sleeving mode, a bearing seat is fixedly installed on the inner wall of one side of the gear box, a transverse shaft is rotationally installed on one side of the bearing seat, a first bevel gear is arranged on the transverse shaft in a sleeving mode, and one end, away from the bearing seat, of the transverse shaft is fixedly sleeved with a second transmission straight gear. The centralized driving type multi-pass nonferrous metal rolling mill is reasonable in design and good in practicability, effective purifying and cooling can be carried out on lubricating oil in the gear box, the lubricatingoil is evenly sprayed to the plurality of gears in the gear box by utilizing reciprocating left-right swing of a plurality of spray heads, and therefore the lubricating effect on the plurality of gears is improved, abrasion between the gears is reduced, the service life of the plurality of gears in the gear box can be prolonged, the replacement frequency of the lubricating oil can be reduced, theservice life of the lubricating oil can be prolonged, and the economic cost is reduced.