218results about How to "Play an adsorption role" patented technology

A bioadsorbent for treating the sewage containing heavy metal ions (5-2000 ppm) and with 2-11 of pH value is prepared by coating method and blotting method to coat the surface of mycelia (citrobacteria, yeast, etc) with the glucosan, chitosan, or chitosan derivative. Its advantages are low cost, high adsorption capacity (30-100 mg / g) and cyclic use (20 times).

The water purifier for deeply treating tap water through filtering, purifying, mineralizing, activating, alkalifying and softening consists of one mineralizing tray and filtering element. The filtering element includes successively arranged active carbon layer, small Chinese medicinal stone grain layer, Chinese medicinal stone-ceramic ball layer, tourmaline-ceramic ball layer and calcium sulfite ball layer. Inside the mineralizing tray, is the mixture comprising large Chinese medicinal stone grain 50-60 weight portions, tourmaline 15-20 weight portions, magnetite 8-10 weight portions and composite tourmaline material 5-8 weight portions. The purified water can promote metabolism, neutralize acid metabolites in body, eliminate free radical, prevent diseases and result in other health functions.

The invention discloses a dynamic dehumidification device for drying plastic particles, and belongs to the technical field of plastic particle processing. Moisture on the plastic particles is absorbedand dried through magnetic dehumidification balls, and before the magnetic dehumidification balls absorb the moisture, magnet layers can magnetically absorb hollow magnetic balls, and after the magnetic dehumidification balls absorb the moisture to a certain degree, outer moisture absorption expansion layers absorb water and expands to extrude inner elastic magnetic shielding layers, inner elastic magnetic shielding layers are extruded to be tightly attached to the hollow magnetic balls, so that a certain magnetic shielding effect on the hollow magnetic balls is achieved; and the magnetic dehumidification balls are reset inwards under the action of extension springs, and after a drying part is dried and the outer moisture absorption expansion layers lose water, the inner elastic magneticshielding layers expand outwards to weaken the shielding effect on the hollow magnetic balls, when the magnetic attraction force of the magnet layers to the hollow magnetic balls is larger than the tensile force of the extension springs, the magnetic dehumidification balls are pulled to move outwards, reciprocating dynamic movement is matched with a rotating dehumidification cylinder, and the gooddehumidification effect on the plastic particles is effectively achieved.

The invention relates to a preparation method of a carbon nano-tube based Fenton-like catalyst for an advanced oxidation system. The preparation method is characterized by comprising the following steps: (1) firstly, carrying out oxidation treatment on a primary sample of an iron-containing carbon nano-tube at an air atmosphere; (2) then, carrying out high-temperature reduction treatment on the primary sample at a protective atmosphere; (3) next, sufficiently mixing elemental sulfur and a reactant, and then, carrying out sulphur treatment on the mixture at a certain temperature; (4) finally, after the reaction is ended, dispersing the product into a sodium sulfide solution, repeatedly washing the mixture, filtering and drying in vacuum to obtain a carbon nano-tube / ferrous sulfide based Fenton-like catalyst. The preparation process can be continuously carried out, the method is relatively simple, and the problem of secondary environment pollution possibly existing in the preparation process is reduced. Due to the implementation of the work, the Fenton-like catalyst with the carbon nano-tube as a carrier can be favorably and widely applied on a large scale.

The invention discloses a method to plant Medicago sativa in saline-alkaline soil and improve soil and fertilizer condition. The method comprises: applying an improving fertilizer, plowing, performingrotary tillage and leveling the land, sowing, managing the field, and harvesting, wherein the improving fertilizer is made from desulfurization gypsum, activated carbon, flyash, plant stalk granules,bentonite, zeolite, urea, ammonium phosphate, blast furnace slag particles and a microbial agent having a weight ratio of (30-40):(10-14):(6-10):(16-18):(8-12):(4-8):(3-5):(3-5):(4-6):(1-3). saline-alkaline soil is improved by taking the measures such as saline-alkaline soil improving fertilizer and planting Medicago sativa, the survival rate and yield of Medicago sativa are high, the improving of the whole saline-alkaline soil is excellently effective, and the improving process is green and free of pollution. Therefore, the method is an application technique worthy of wide popularization.

The invention provides a preparation method and application of a heavy metal adsorber. The preparation method includes preparing gel from agar and acrylic acid through a one-step sol-gel method, and preparing double-network gel with super-strong mechanical performance and excellent removal effect on heavy metal from the gel with epichlorohydrin as a cross-linking agent and triethylene tetramine as a crosslinker through amino functional modification. Of a three-dimensional network porous structure, the double-network gel has high osmotic pressure and is capable of adsorbing heavy metal ions in a solution rapidly; all adsorption sites in the network structure can be exposed sufficiently, and accordingly the double-network gel is high in adsorption capacity; through two network interpenetration structures and the effect of negative and positive ions on static electricity, the mechanical performance of the gel is enhanced greatly, and the gel can be separated from the adsorbed solution directly to achieve rapid and effective recovery of the adsorber. The preparation method is simple in preparation, free from restrictions of extreme experiment conditions and capable of treating wastewater containing Cd (II) or other heavy metals.

The invention discloses an additive-containing single-crystal-state potassium nitrate glass-reinforced molten salt and a glass reinforcing technology. The additive-containing single-crystal-state potassium nitrate glass-reinforced molten salt is composed of the following compositions in percent by weight: 97%-98.5% of KNO3, 1.125%-2.55% of silicon dioxide, and 0.225%-0.75% of KCl. Compared with the prior art, the additive-containing single-crystal-state potassium nitrate glass-reinforced molten salt has the following substantially advantages: 1, the crystal form of silicon dioxide in the reinforced molten salt is determined as an amorphous state, and addition of amorphous silicon dioxide helps to improve the chemical durability and mechanical performances of chemical reinforced glass, and also gives play to adsorption effect on impurities in the molten salt; and 2, KCl in the reinforced molten salt helps to accelerate the ion exchange reaction through induction effect, and also gives play to effect of purifying the molten salt. The single-crystal-state reinforced molten salt helps to substantially reduce production cost and improve the reinforced glass quality, and has wide application prospect.

The invention discloses a greasy dirt flocculation deoiling device for industrial sewage. The invention belongs to the technical field of sewage treatment. Upper elliptic adsorption layers coating thebottom end parts of adsorption floating balls are used for adsorbing greasy dirt flocculation particles on the water surface. After the flocculation operation is finished, sewage is discharged, the adsorption floating balls sink and abut against filtering oil guide mechanisms, meanwhile, an electric push rod presses down a sealing plate to enable the sealing plate to abut against the adsorption floating balls again, an electromagnet is electrified to magnetically attract a magnetic sealing cover plate, the electric push rod resets upward, the magnetic sealing cover plate and a gas stamping mechanism are pulled upwards, the gas stamping mechanism is separated from the filter holes of elliptic floating balls, sodium peroxide in the elliptic floating balls is diffused outwards to the upper elliptic adsorption layers through the filter holes, sodium peroxide powder generates sodium hydroxide and oxygen which can decompose greasy dirt particles when encountering water, the oxygen is used for scattering condensed particles to enable the greasy dirt particles to fall off easily, the gas stamping mechanism releases gas after being pulled to be broken, and the diffusion degree of the sodium peroxide powder is effectively improved.

The invention discloses a technological method for treating coking wastewater. The technological method comprises the following steps that (1) coking wastewater is subjected to ammonia distillation and oil-water separation sequentially; (2) coking wastewater after oil-water separation is subjected to water quality regulation; (3) coking wastewater after water quality regulation enters an iron+activated coke reactor for iron-carbon micro-electrolysis and suspended particles in the coking wastewater are absorbed; (4) coking wastewater flowing out of the iron+activated coke reactor is subjected to biological removal of nitrogen and organic pollutant removal treatment; (5) coking wastewater after biochemical treatment is subjected to coagulating sedimentation for mud-water separation; (6) mud after mud-water separation is subjected to thickening and dehydration treatment, and the coking wastewater after mud-water separation is subjected to deep ozonation treatment; the technology operates stably, the cost is low, the treatment efficiency is high, the load capacity resistance is high, and the operation is easy.

The invention discloses a low-temperature SCR denitration catalyst and a preparation method thereof, and belongs to the technical field of low-temperature SCR denitration. According to the method, an FCC waste catalyst and modified biochar are used as supporting carriers, transition metal oxides are used as active components, the loading amount of transition metal elements in the components is 5-20% of the weight of the carriers, the active components are loaded on the carriers by adopting an impregnation method, then drying treatment is performed, and finally roasting is performed in a nitrogen atmosphere, and the low-temperature SCR denitration catalyst disclosed by the invention is obtained. The problems of low low-temperature denitration activity and high cost of a vanadium-titanium catalyst are solved, resource comprehensive utilization of the FCC waste catalyst is achieved, damage of industrial solid waste to the environment is reduced, and the prepared SCR catalyst has excellent denitration performance under the low-temperature condition and has good application prospects and market prospects for low-temperature denitration of industrial flue gas.

The invention discloses organic fertilizer for saline and alkaline land transformation as well as a preparation method thereof. The organic fertilizer for saline and alkaline land comprises 42 to 48 parts by weight of animal waste, 12 to 14 parts of plant straws, 10 to 12 parts of tea powder, 8 to 10 parts of bagasse, 6 to 8 parts of seaweed powder, 4 to 8 parts of a pH regulator, 4 to 6 parts ofan adsorbent and 3 to 5 parts of a loosening agent, and also comprises 1 to 3 parts by weight of microbial agent and 0.01 to 0.03 part by weight of rooting powder. The animal waste, the plant straws,the tea powder, the bagasse and the seaweed powder are subjected to composting treatment, the pH regulator, the adsorbent, the loosening agent, the microbial agent and the rooting powder are added, and pelletizing is performed to prepare the organic fertilizer. The organic fertilizer can effectively improve the soil structure of the saline and the alkaline land, improve the soil fertility and reduce the salinity and alkalinity, cooperates with plant cultivation to improve the water-retaining property of the soil and prevent salt return, can improve the saline and the alkaline land durably andeffectively, and can change the desolate beach into the fertile land after being circulated for many times.

The invention discloses a round pipe welding clamping device, and belongs to the technical field of round pipe welding assistance. A round pipe is arranged between a pair of hollow annular jackets, apneumatic suction mechanism is matched with a semiconductor refrigeration box to supply air into the hollow annular jackets, cold air overflows into a hollow cavity and continuously presses a plurality of annularly arranged piston driving mechanisms to push heat conduction arc-shaped clamping pieces to move towards the outer side so as to clamp and fix the round pipe, and cold air guided into thehollow cavity is matched with the heat conduction arc-shaped clamping pieces, so that heat generated by welding of the circular pipe is effectively dissipated outwards for cooling and heat dissipation; and meanwhile, after welding, the interior of the hollow cavity is in a negative pressure state through back suction operation of the pneumatic suction mechanism, on one hand, the multiple heat conduction arc-shaped clamping pieces are effectively moved towards the inner ends of the hollow annular jackets and separated from the outer wall of the circular pipe, and on the other hand, heated air in the hollow cavity is led out to be replaced, so that the requirement for next circulation refrigeration is met.

The invention discloses a method for planting lycium ruthenicum in saline-alkali soil and improving soil and fertilizer statuses. The method comprises the steps: improving fertilizer addition and landpreparation; ridging; timely seeding; field management; shape pruning; and harvesting and processing, wherein an improving fertilizer comprises desulphurization gypsum, activated carbon, coal ash, poultry excrements, zeolite, potassium feldspar, felt fiber and blast furnace slag particles which are in the weight ratio: (40-50):(10-14):(8-12):(8-12):(4-8): (4-8):(4-8):(4-6). In the method, the lycium ruthenicum is planted by improving the saline-alkali soil by using the improving fertilizer and a drip irrigation system, the survival rate and yield of the lycium ruthenicum are high, the effecton improving the whole saline-alkali soil is remarkable, and the improving process is green, environment-friendly and pollution-free. Therefore, the method is an application technology worthy of beingpopularized on a large area.

The invention discloses a method for improving a saline and alkaline land by utilizing alfalfa-beet-cotton-maize rotation. By the method, the saline and alkaline land is improved by ditching and draining, pressing salt into fresh water, adding improved fertilizer or compound fertilizer, performing ploughing and rotary tillage, planting alfalfa, beet, cotton and maize year by year and returning straws. The method has prominent improvement effect on the whole saline and alkaline land, and the improvement process is environment-friendly and pollution-free. Therefore, the method is an applicationtechnology worthy of large-area popularization.

The invention belongs to the field of chimneys, and particularly relates to a self-cleaning dust filtering chimney, comprising a chimney body; an annular sealing plate is fixedly connected in the chimney body; a cylindrical filter element is fixedly connected in the annular sealing plate; the cylindrical filter element is internally provided with an annular plate; a plurality of dust suction branch pipes are embedded on the side wall of the annular plate; the input ends of the dust collection branch pipes are in abutting contact with the inner side wall of the cylindrical filter element; a dust collection main pipe is slidably and sealingly connected in the cylindrical filter element; the output ends of the plurality of dust collection branch pipes communicate with the dust collection mainpipe; the upper side of the chimney body is provided with a conical rain shielding plate, a conical cavity is arranged in the rain shielding plate, the upper end of the dust collection main pipe extends into the conical cavity and is fixedly connected with the rain shielding plate, the upper end edge of the dust collection main pipe is turned outwards to form a dust shielding ring, the upper endof the conical cavity is provided with an opening, and the opening is internally and fixedly connected with an unpowered wind ball. The self-cleaning dust filtering chimney provided by the invention can suck and clean the filter element continuously by using the wind power, and then the service period of the filter element can be prolonged.

The invention discloses an anti-diffusion tunnel surrounding rock blasting hole slag removal device, and relates to the technical field of tunnel construction. The anti-diffusion tunnel surrounding rock blasting hole slag removal device comprises a box body; first ball bearings are fixedly connected into the left side and the right side of the box body; a first rotary shaft is fixedly connected tothe inner walls of the first ball bearings, and the right side of the surface of the first rotary shaft is fixedly connected with fan blades; and a first conical fluted disc is fixedly connected to the position, located on the left sides of the fan blades, of the surface of the first rotary shaft. According to the anti-diffusion tunnel surrounding rock blasting hole slag removal device, negativepressure forms in the box body through rotation of the fan blades, waste slag removed from blasting holes is collected into the box body through a first pipeline and prevented from being diffused intothe other blasting holes, and accordingly, the problems that a slag removal device on the market at present cannot collect waste slag removed from blasting holes, the waste slag removed from the blasting holes are prone to being diffused into the cleaned blasting holes, and then, the blasting holes are not thoroughly cleaned are effectively solved.

The invention provides a sewage recycling processor, comprising a shell, a central cylinder, active carbon filler, a water collection bucket, a water outlet pipe, a water inlet pipe, a medicine feeding pipe and a mud discharging / evacuation pipe at the bottom of the shell. The sewage recycling processor is characterized in that the lower end of the central cylinder is a trumpet-shaped opening and is communicated with a cavity at the bottom of the shell; the upper end of the central cylinder is closed, and the water inlet pipe is introduced from the upper part of the shell and penetrates from the top of the central cylinder; an annular ozone pipe is arranged below the active carbon filler; the annular ozone pipe is connected with ozone releasers which are uniformly arranged, and surrounds around the periphery of the central cylinder; one end in the shell, which is provided with an ozone air inlet pipe, is connected with the annular ozone pipe; and the ozone air inlet pipe penetrates through the shell to be connected with an outer zone generator, and a solenoid valve is arranged on the ozone air inlet pipe outside the shell. According to the sewage recycling processor disclosed by the invention, steps of coagulation, precipitation, ozone oxidization, filtration and adsorption are finished in one pot; and the sewage recycling processor has the advantages of reasonable and compact structure, good quality of output water, high processing efficiency, low operation cost and strong adaptability.

The invention discloses corn dumpling flour which is characterized in that: the corn dumpling flour is prepared by mixing pure corn flour, frozen corn flour, cured corn flour, puffed corn flour, puffed soybean flour, glutelin flour and sodium carboxymethylcellulose at a mass ratio of (35-45): (5-15): (5-15): (5-15): (15-25): (5-15): (0.03-0.05). The dumpling wrapper prepared from the dumpling flour has delicate mouthfeel and golden color, and is not broken after long-term boiling while the soup is clear; and moreover, if the flour is kneaded in the processing process, the dumplings can be made without needing fermentation.

The invention discloses a washing machine panel glass transport vehicle which sequentially comprises a fixing frame, a vibration-proof base and a fixing bottom plate from top to bottom. The two opposite sides of the fixing frame are provided with a plurality of sets of glass fixing pieces. Each set of glass fixing pieces comprise at least two glass fixing pieces fixed to the two opposite side walls of the fixing frame. An air bag soft cushion layer is connected between every set of glass fixing pieces. According to the glass transport vehicle, glass is placed in a vertical staked mode, the vibration-proof base is arranged and can counteract damage caused by part of vibration to the glass in the transport process, the air bag soft cushion layer is cooperated with the glass fixing pieces to play a role in supporting the glass on the whole, and the damage to the glass is reduced to the greatest degree.

The invention discloses a method of planting beet in saline-alkaline soil and improving soil and fertilizer conditions. The method comprises: adding saline-alkaline soil improving fertilizer, preparing a land, treating seeds, sowing the seeds, managing the field, and harvesting, wherein the saline-alkaline soil improving fertilizer comprises desulfurization gypsum, activated carbon, flyash, livestock excrement, zeolite, potassium feldspar, felt fiber, blast furnace slag particles, and a microbial agent in a weight ratio of (40-50):(10-14):(8-12):(8-12):(4-8):(4-8):(4-8):(4-6):(1-3). Accordingto the method, saline-alkaline soil is improved by taking measures, such as use of the saline-alkaline soil improving fertilizer and planting of beet, the survival rate and yield of beet are high, theimproving effect for the whole saline-alkaline soil is excellent, and the improving process is green and free of pollution. Therefore, the method is an application technique worthy of wide popularization.

The invention relates to the technical field of ceramic tile surface treatment, and in particular relates to a ceramic tile antiskid agent and a preparation method thereof. The ceramic tile antiskid agent comprises the following raw materials: hypochlorous acid, hydrochloric acid, fluoride salt, a penetrant, a brightener, a polymer foaming material, a coupling agent, a dispersant and water; wherein the particle diameter of the polymer foaming material is 5-20mu m. After the ceramic tile antiskid agent is adopted for treatment, dry ceramic tiles are antiskid; when feet step on the antiskid treated ceramic tiles, the polymer foaming material is pressed, and a gas adsorbed in the polymer foaming material is extruded, so that the polymer foaming material is urged to adsorb foot surface, and the antiskid effect is increased; for wet ceramic tiles, the dynamic process of contact between the tile surface and the sole of the feet when exposed to water or oil stains can achieve vacuum adsorption to provide better road holding force, thus improving the anti-skid effect. The ceramic tile antiskid agent can not only play an antiskid role on the ceramic tiles with water stains / oil stains, but also play an antiskid role on the dry ceramic tiles.

The invention discloses an embedded soil heavy metal adsorption and transfer device, and belongs to the technical field of soil remediation. According to the embedded soil heavy metal adsorption and transfer device, the magnetic adsorbent particles which can be driven along with the magnetic conductive conveyor belt are arranged, the magnetic adsorbent particles positioned in the adsorption plateform a metal ion adsorption surface, the adsorption surface reaches adsorption saturation, upward driving is controlled to enter a collecting box for collection, the magnetic adsorbent particles whichare guided out again are adsorbed on the conveyed magnetic conductive conveying belt again, a new adsorption surface is formed, and manual collection and re-burying of the adsorbent are not needed; in addition, the introduced desorption liquid permeates into the soil and then reacts with the soil, metal ions in soil are released so as to be conveniently adsorbed by magnetic adsorbent particles inthe adsorption plate, the introduced gas enhances the fluidity of desorption liquid, the gas flows in the soil and then drives the metal ions to flow, and the adsorption effect is effectively improved.

The invention discloses a hot-melt expansion type textile wastewater adsorption device, and belongs to the technical field of textile wastewater treatment. Floating type adsorption balls expanding outwards are matched with petal-shaped plastic belts with a magnetic attraction function. After a wrapping bag used for binding floating strips and the bottom ends of the petal-shaped plastic belts is melt by heat, the plurality of floating strips and the petal-shaped plastic belts expand outwards and upwards under the inertia effect, at the moment, a plurality of the floating adsorption balls sleeving the floating strips are separated from the floating strips and scattered in the wastewater, and used for adsorbing fiber particles in wastewater, the petal-shaped plastic belts horizontally floating on the water surface utilize external expansion type adsorption balls at the bottom ends of the petal-shaped plastic belts to adsorb fiber flocculate floating upwards; after the petal-shaped plastic belts are electrified, the petal-shaped plastic belts can adsorb the floating type adsorption balls floating in the wastewater; and meanwhile, a large amount of gas is provided for the wastewater byutilizing a matching structure of the oval aeration bag and a second molten capsule layer, so that the floating strength of the whole device is effectively improved, and uniform diffusion of the plurality of floating type adsorption balls is facilitated.

The invention relates to a chip and dust removal device of a processing machine tool. The chip and dust removal device comprises a rack, wherein the rack comprises a water tank, a lifting frame and atransfer frame, a plurality of water permeable holes and a material carrying plate are arranged on a conveying belt, a blowing mechanism is arranged outside the lifting frame, a material collecting box is arranged at the bottom of the transfer frame, a cyclone dust collector and a fan are arranged on one side of the rack, an air suction hopper is connected to the end of an air inlet pipe of the cyclone dust collector, an air conveying pipe is arranged between the fan and the purging mechanism, a C-shaped magnet is arranged in a driving roller, and a material baffle and a material partition which are obliquely arranged are arranged in the material collecting box. According to the chip and dust removal device, a large number of waste mixtures containing water of the processing machine tool can be continuously treated in time, the preliminary separation of chips from water is combined with blowing separation, cyclone separation is combined with blowing adsorption, so that dust is efficiently treated, the dust removal load is reduced, cooling water is recycled, energy consumption and cost are reduced, and waste materials are separated and collected, so that byproducts and recycling values are increased, and continuous operation and machining quality of the processing machine tool are guaranteed.

The invention provides an iron-based soil remediation agent and a preparation method thereof. The iron-based soil remediation agent is prepared by uniformly spraying a Rujin bacterium stock solution on a mixture of biogas residues, straw powder and pig manure mixed with oxalic acid, then compacting, stacking, sealing and fermenting to obtain odorless biogas residues, then mixing a ferric salt, a calcium salt and biochar, drying, and then extruding and crushing an obtained product with the odorless biogas residues, polyacrylic acid and manganese dioxide through a screw. The iron-based soil remediation agent provided by the invention has good adsorption performance; in addition, arsenic in the soil can be converted into Fe-As and Ca-As complexes; meanwhile, abundant organic humus is contained, arsenic adsorbed by the arsenic complex and the soil can be converted into effective-state arsenic, the arsenic content in the soil is effectively reduced, the remediation effect on the arsenic-contaminated soil is good, the preparation process is simple, the cost is low, the raw materials are renewable, and the method has the advantages of being good in environment friendliness and the like.

The invention provides a water quality purification dike for improving water intake water quality. The water quality purification dike includes a pile foundation, on which a purification dike frame is fixed. The purification dike frame comprises an outer ring wall and an inner ring wall positioned inside the outer ring wall. The space between the outer ring wall and the inner ring wall is filled with a filtering filler. The outer ring wall is provided with a water inlet, the inner ring wall is provided with a water outlet, the space enclosed by the inner ring wall and the pile foundation is internally provided with a water intake, which is communicated with a water intake pipe. The water quality purification dike for improving water intake water quality employs a trash rack to isolate and adsorb contaminants in the water body flowing into the water intake. The purification dike frame is filled with the filtering filler for adsorbing the contaminants in the water flow, thus effectively guaranteeing and improving the water supply safety of a drinking water source.

The invention relates to a novel efficient filter. The novel efficient filter comprises a shell which is of a cylindrical structure and a cover covering an upper opening of the shell, wherein the cover and the bottom of the shell are both of a porous structure. The novel efficient filter further comprises filter paper arranged in an inner cavity formed by the shell and the cover, wherein each piece of filter paper is provided with a plurality of bent parts in the same width, the bent parts are distributed in the length direction of each piece of filter paper, the multiple pieces of filter paper are stacked together with the bent parts matched, the filter paper can be sealed in the shell in a compressed mode by the cover, and the distance between every two adjacent bent parts becomes smaller during compression. The filter paper can be sealed conveniently and easily by means of the cover and shell structure to form the main structure of the filter. Due to the fact that the bottom of the shell and the cover are both of the porous structure, the filter paper can be sealed, and it can be guaranteed that air can flow from one end of the efficient filter to the other end of the efficient filter. The shell and the cover are fixed through a plurality of buckle structures, it is guaranteed that the filter paper can be compressed by the cover by different degrees, and the larger the compression amount is, the better the filtering effect is.

The invention belongs to the field of life, and particularly relates to a negative pressure antiskid tray. The negative pressure antiskid tray comprises a tray body, wherein the tray body is internally provided with a cavity, the cavity is arranged in an inverted T shape, the upper end of the cavity is provided with a first opening communicated with the outside, the upper end of the tray body is fixedly connected with a sealing membrane covering the first opening, both sides of the cavity are both provided with second openings, and the second openings are internally provided with control mechanisms used for adjusting air pressure in the cavity. The negative pressure antiskid tray has the advantages that the control mechanisms are utilized to change the volume in the cavity, thereby makingthe sealing membrane sunken downward so as to adsorb a dish container under the action of the air pressure, so that the dish container is prevented from sliding on the surface of the tray, the situations that the soup in the container overflows or the container drops to the ground are greatly reduced, the structure is simple, the operation difficulty is low, and the practicability is high.

The invention discloses a sterilizing air purifying agent as well as a preparation method and application thereof. The sterilizing air purifying agent comprises a surface layer and a core layer, wherein the surface layer is a bacteriostatic and bactericidal membrane containing glycerol monolaurate, and the core layer is a mixture of tourmaline powder and nano-zinc oxide-loaded medical stone particles. Furthermore, the invention also discloses the preparation method of the sterilizing air purifying agent and application of the sterilizing air purifying agent in refrigerator sterilization and air purification. The sterilizing air purifying agent provided by the invention is safe and non-toxic, and can be used for spaces such as domestic refrigerators which have the demands of sterilization and air purification. The air purifying agent can effectively inhibit the production of extracellular toxins by bacteria; the air purifying agent can kill gram-positive bacteria, gram-negative bacteriaand the like, and the sterilization rate can reach 99%; the air purifying agent can generate negative ions so as to play a role of air purification.