118results about How to "Improve purification function" patented technology

An object of the present invention is to provide a honeycomb structural body for use in a filter, which can be provided with a large amount of catalyst, can suppress an increase in pressure loss upon collecting particulates, can have a high particulate collecting capability and can efficiently carry out a regenerating process and a toxic gas purifying process. The honeycomb structural body of the present invention is a pillar-shaped honeycomb structural body that is mainly composed of inorganic fibers and has a structure in that a large number of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween. Herein, the inorganic fibers, which form the honeycomb structural body, are arranged in such a manner that more fibers are aligned along a face perpendicular to the forming direction of the through holes rather than aligned along a face in parallel with the forming direction of the through holes.

The invention relates to the technical field of water environment ecological restoration, in particular to a system for restoring bio-ecological environment of a micro-polluted riverway, wherein a biological contact oxidation module adopts elastic three-dimensional packing or combined packing, the riverway coastal area is provided with emergent aquatic plant floating floors or floating plant floating floors, the upstream and the downstream of the riverway are provided with floating plant purification zones, and the water surface coverage of the floating floors is between 15 and 20 percent; both coasts of the riverway are plated with emergent aquatic plants and the water surface is planted with floating plants, and water areas with more than two times of transparency are plated with submerged vegetations; and sloping fields on both sides of the riverway are planted with un-germinated poplar or willow branches through cottage; and simultaneously, the poplar or willow branches are embedded into sloping banks shallowly and horizontally according to contours in a mode of being bundled up into a bunch of fascines at different positions of the sloping fields. Compared with the prior art, for the ecological restoration and construction, the system achieves self-purification, self-regulation and self-sustaining of pollutants within certain concentration range, and is an effective path for improving water quality under the condition that basin-wide pollutant cutoff cannot be performed at present.

A method for cleaning sewage by vertical undercurrent type artificial wet land in northern area features that a scientific microbe carrier network consisting filler layers, insulating reproduction layer, etc is disclosed for fast forming a biomembrane system for playing its cleaning role without plants in the winter, a deeply buried multi-layer water tube network can prevent freeze and cracking, and more insulating techniques are used to keep the temp of sewage to be treated to 15-20 deg.C.

The invention relates to a sponge iron-AT (Aluminium Titanate)-PVF (Polyvinyl Fluoride) composite filler and application thereof on water treatment. The composite filler is formed by filling attapulgite composite hydrophilic polyurethane foam of the size of 1.5*1.5*1.5cm and sponge with the grain diameter of 2-5cm at the weight ratio of 1: (4-50). The sponge iron-AT-PVF composite filler has the characteristics of low cost, good water treatment effect, high degrading speed and high removal rate on elements N and P as well as organic matters which are difficult to be degraded in the wastewater. The TN (Total Nitrogen) and TP (Total Phosphorus) indexes in the effluent can be drastically lowered under the aerobic or anaerobic conditions when the composite filler is put into a common biochemical treating pond.

The invention relates to an air purifier. The air purifier comprises a base assembly, at least one air purifying module and an air feeding assembly which are detachably connected from bottom to top. A user can freely select and assemble different numbers of air purifying modules with different functions to form the air purifier according to the self demands. The air purifying modules can be of the same structure and have the same function, and the purifying efficiency of the air purifier can be improved by increasing the number of the air purifying modules. The air purifying modules can also of different structures and have different functions, purification of different pollutants can be carried out on air by increasing the number of the air purifying modules, and the purifying functions of the air purifier are increased. According to the air purifier, the user can freely select different numbers of air purifying modules with different functions according to the self demands so that the air purifier can adapt to the living room environment of the user to the maximum, and the purifying effect is improved.

The invention discloses a preparing and purifying method of dealing modularization air-float artificial mattress of wastewater, wherein the main frame of bed display member frame structure as cube box; the bottom, angle and side wall connected with pipes; the top open up to the air; the grid plate is set on the bottom of the bed; the planting box is set on the grid plate; planting vegetation through the planting hole; setting several floats on the side wall; counteracting the weigh of bed body with floatage; keeping balance of bed body in the water; installing ports for passing water on the bottom of float bowl with at least 2 float bowl on the holder; inserting gas-filled lamp into float bowl through ports for passing water; equipping inflating gate valve on the other side of gas-filled lamp. The invention possesses rational structure and simply production, which can improve the survival rate of water plant.

A water filter has a body provided with an inlet, an outlet and a drain pipe provided with lock valves and a main filtering element composed of an ion-exchange material and having input and output surfaces for filtrated liquid, wherein the ion-exchange material is embodied in such a way that it is voluminous, has a required shape, is reinforced with a rigid reinforcement which is fixed to a perforated support, and forms a continuous porous frame from sphero colloids having required pore sizes which are defined by required cleaning parameters, the volume of the filtering mass of the element material being calculated according to mathematical expressions, and the input surface of the main filtering element is coated with an additional filtering and correcting layer of a fine substance introduced in the form of a powder through a loading valve in the cavity of the body in a filtered liquid flow deposited on the input surface of the main filtering element and dynamically retained by ram pressure of liquid, with the powder granule sizes being higher than the pores of the pores of the ion-exchange material, and the volume thereof corresponding to the shape of the main filtering element and defined according to mathematical expressions.

PROBLEM TO BE SOLVED: To provide an exhaust pipe structure capable of accurately controlling an air-fuel ratio in a motorcycle having two mufflers in its exhaust system while mounting a single cylinder engine thereon. SOLUTION: In this motorcycle, the single cylinder engine is mounted and two mufflers 18 and 19 are installed in the exhaust system of the single cylinder engine. The exhaust system comprises exhaust outlet pipes 10a and 11a connected to the cylinder head 5 of a single cylinder, a main exhaust pipe 12 for flowing, therein, all exhaust gas in the single cylinder continuously connected to the exhaust outlet pipes 10a and 11a, two branched exhaust pipes 10b and 11b continuously connected to the downstream side of the main exhaust pipe 12, and the mufflers 18 and 19 installed at the end part of the branched exhaust pipes 10b and 11b. An O<SB>2< / SB>sensor 14 detecting the concentration of oxygen in the exhaust gas is installed in the main exhaust pipe 12, and catalysts 16 and 17 are installed in the branched exhaust pipes 10b and 11b. COPYRIGHT: (C)2006,JPO&NCIPI

The invention relates to a moveable air-purifying plant wall and a using method thereof. The plant wall comprises a plant wall body and an air-purifying water tank, wherein a filter material with an air-purifying function is also mounted. According to the moveable air-purifying plant wall, air can be purified by plants; polluted air is absorbed into the water tank and is purified through absorption of water and the filtering and adsorption effects of the filter material; the purified air returns indoors. The moveable air-purifying plant wall can purify the indoor air through multiple effects of absorption by water, filtering by the filter material, absorption by the plants and the like, can purify the pollutants comprising volatile gas pollutants such as PM 2.5 suspended particles, formaldehyde and benzene series in the air quickly and efficiently, and has the characteristics of low energy consumption, high pollution-removing efficiency, low noise and the like.

An object of the present invention is to provide a honeycomb structural body for use in a filter, which can be provided with a large amount of catalyst, can suppress an increase in pressure loss upon collecting particulates, can have a high particulate collecting capability and can efficiently carry out a regenerating process and a toxic gas purifying process. The honeycomb structural body of the present invention is a pillar-shaped honeycomb structural body that is mainly composed of inorganic fibers and has a structure in that a large number of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween. Herein, the inorganic fibers, which form the honeycomb structural body, are arranged in such a manner that more fibers are aligned along a face perpendicular to the forming direction of the through holes rather than aligned along a face in parallel with the forming direction of the through holes.

The invention provides a nano-composite material catalyst which is composed of a supporter and a catalytic active component that is immobilized in the supporter, wherein the supporter is activated charcoal or porous carbon nano-spheres that are processed hydrothermally. The catalytic active component is a manganese oxide or is a manganese oxide doped with metal oxides comprising at least one oxideof metal elements of: Fe, Co, Ni, Co, Zn, Al, Ce and Sn. The preparation process of the catalyst is simple and is easy to control, and has short production period. The supporter has large surface area, strong adsorption performance and low gas-resistance. When being supported, the catalytic active component is not liable to fall off, so that the catalyst has high-effective, continuous and durablepurification functions to volatile and semi-volatile organic substances, such as formaldehyde, benzene, phthalate and the like, in indoor air.

The invention discloses a preparing method of biological sponge iron to dispose effluent, which comprises the following steps: 1. making sponge iron into 2-5cm particle; soaking in the clean water for 4-12h; washing; 2. adding predisposed sponge iron in the biochemical reactor; aerating the disposed effluent with pH value at 6-9 until the sponge iron in the reactor is immersed completely; adding active sludge as inoculating flora; proceeding microbe domestication and fixing reaction under exposing condition; waiting the water quality index of outlet water approaching stable; finishing.

The invention provides a water quality safeguard system and a water quality safeguard method for a drinking water reservoir. According to the water quality safeguard system and the water quality safeguard method, an automatic water quality monitoring mechanism, a water inflow regulating and controlling mechanism, a reservoir area water ecology mechanism and a water outflow regulating and controlling mechanism are adopted to treat raw water which flows from a river channel into the reservoir. The water quality safeguard system and the water quality safeguard method, provided by the invention, have a wide application range, play a favorable role in water qualification and water quality safeguard of drinking water reservoirs in plain and mountain areas, have the advantages of high water quality safeguard property, good water qualification effect and high water supply safety, reflect the concepts of ecological preservation, low carbon, environmental protection and the like, have high economy, high practicability and wide applicability, are especially suitable to popularize and apply among drinking water reservoirs with unstable raw water quality, long water retention time, eutrophication risks, low water supply assurance rates and emergency water storage functions.

The invention relates to a white smoke eliminating and purification integrated device. The white smoke eliminating and purification integrated device comprises a gas inlet pipeline, the gas inlet pipeline is communicated with a flue gas warming device, the flue gas warming device is communicated with a purification device, and the purification device is communicated with a flue gas discharge pipe.The flue gas warming device comprises a shell, an inner cavity of the shell is provided with multiple heat exchange pipes, one ends of the heat exchange pipes are communicated with the gas inlet pipeline, the other ends of the heat exchange pipes are communicated with the purification device, and a heat exchange space is formed between the inner wall of the shell and the outer walls of the heat exchange pipes and communicated with the flue gas discharge pipe. By means of the flue gas warming device, high-temperature flue gas in the gas inlet pipeline and low-temperature flue gas in the flue gas discharge pipe can conduct heat exchange to increase the discharge temperature of the flue gas and decrease the temperature of the flue gas entering the purification device. By means of the white smoke eliminating and purification integrated device, the defect that existing flue gas cannot be subjected to purification and white smoke eliminating in one system can be overcome, and the efficiencyof purification and dewatering the flue gas is improved.

The invention provides an ecological softening structure of a rigid revetment. The ecological softening structure comprises a supporting frame arranged along a revetment base body. A mesh type grid is arranged in the supporting frame, a plurality of cells are formed, and an intercepting layer is arranged outside the supporting frame. Each cell is filled with planting matrixes. Terrestrial plants are planted in the zone above a water level. Emergent aquatic plants are planted in the underwater zone with the water depth smaller than 30 cm. Submerged plants are planted in the underwater zone with the water depth between 30 cm-100 cm. The ecological softening structure is not limited by riverway water depth and is not affected by levee crown back way arranging, the application range is wide, by reasonable matching of the terrestrial plants and the emergent aquatic plants, a beautiful revetment landscape is established, and meanwhile the purifying functions of the emergent aquatic plants and the submerged plants are used for purifying riverway water quality. The ecological softening structure has the advantages of being simple in structure, low in building cost, convenient to construct, easy to maintain and manage and the like, and great economy, practicability and wide applicability are achieved.

The invention relates to a planting method for streamside flooding area wetland vegetation, in particular to a planting method for cold region streamside flooding area wetland vegetation. The planting method aims to resolve the problems that vegetation is planted parallel with the river bank in the recovery process of cold region streamside flooding area wetland vegetation, so that a large number of floating objects are wound on the vegetation when the river has a flood, the vegetation is rolled and beaten down by the flood and drift ice and even fully buried or pulled from the roots, and the primarily recovered wetland vegetation is catastrophically damaged. The planting method includes the steps that firstly, the planting direction of the vegetation is determined; secondly, plants are planted, and the planting method for the cold region streamside flooding area wetland vegetation is finished. The flood overflowing direction and the plant row direction are organically combined, a close planting method is adopted in each plant strip area, floating and suspension objects carried by the river flood can be effectively intercepted, the water quality of the river is improved, the interspecific competitive capacity in the recovery period of the plants is improved, and the recovery effect is improved.

The invention relates to the technical field of wastewater retreatment, and in particular relates to a preparation method and use of a compound immobilized biological carrier. The carrier is obtained by mixing a polyurethane foam particle and a sponge ion particle at the weight ratio of 1:(9-31), filling the mixture into a sphere, which is prepared from polypropylene, 100mm in diameter, and 99% in porosity, placing the sphere into activated sludge at the pH (Potential of Hydrogen) value of 7-8, carrying out acclimation for 2-4 hours, taking the sphere out, and cleaning and drying the sphere to obtain the compound immobilized biological carrier at the density of 1.5-2.0g / cm<3>. The carrier provided by the invention is convenient to prepare, simple to operate, low in running cost, high in treatment efficiency, and capable of saving investment and promoting economic efficiency.

A washing method of an air-water backwashing surface of filter materials of a natural filtering bed and a washing control system thereof are provided by the invention. By the use of air lift generated by compressed air, piping generated by water power and separation generated by the mixture of the air and the water, the compact filter materials and a silt layer covered on the natural filtering bed are dispersed to cause the recombination of the filter materials. Meanwhile, with the running of river water, the silt with light weight and sediment are discharged out of the filtering bed, thus increasing the filtration coefficient of a permeable layer and the vertical infiltration velocity of surface water to underground. The control system comprises a seepage well of the natural filtering bed, an air distribution system which generates the air lift and a water distribution system and a control system which generate the piping. By adopting the method and the system of the invention, a water plant is moved to the underground, thus saving investment, occupying less area, having low operation cost, meeting the requirements of environmental engineering, increasing water yield and improving water quality.

The invention discloses a control method for watershed agriculture non-point source pollution. The method comprises the following steps: A, establishing an ecological ditch: constructing the ecological ditch in an area to be treated according to the conditions of a water system to be treated, wherein the ecological ditch includes water blocking bars and / or water introducing openings; B, performingafforestation moisturizing and constructing a biological pond: performing moisturizing by adopting hole-shaped land preparation, a mixed mode and afforestation for cultivated land that still cannot introduce water after the step A, performing moisturizing by adopting whole-cultivation land preparation, a heightening and thickening manner of field ridges and a seeding while land preparation mode for cultivated land that can introduce water after the step A, and enabling the moisturizing area to be constructed into the biological pond; and C, performing ecological restoration along a river: constructing a plant buffer zone in a road along a river in the area to be treated by adopting a mixed mode, and increasing a water blocking depth beside a water field and the road along the river, wherein an operation sequence of the step C and the step A or the step B can be arbitrarily interchanged. Compared with the prior art, the method disclosed by the invention saves a lot of expense, can reduce a concentration of pollutants to the uttermost extent, and has stronger applicability and development prospects.

The invention relates to an air purifier, an air purification module and a primary filter screen installation structure of the air purification module. The installation structure is located on a barrel-shaped supporting shell. The barrel-shaped supporting shell comprises a barrel-shaped outer shell and an annular top cover located in the barrel-shaped outer shell. The barrel-shaped outer shell comprises a base plate and a side wall. The installation structure comprises a primary filter screen installation clamping groove and the inner edge of the annular top cover, wherein the primary filter screen installation clamping groove is formed in the base plate and located under the inner edge of the annular top cover. According to the primary filter screen installation structure of the air purification module, a primary filter screen can be firmly installed, the primary filter screen and other filter elements can be installed independently so that the primary filter screen and other filter elements can be replaced independently according to the dirt blockage conditions of the primary filter screen and the other filter elements, and accordingly the air purification effect is improved.

The invention provides an in-situ step enhanced combined purification system applicable to a slow flow type river. The in-situ step enhanced combined purification system is formed through the following steps: constructing a percolation dam for intercepting a water body step by step, reducing the flow velocity of the water body and promoting preliminary sedimentation of sediments, floating objectsand suspended matters in the water body; constructing a stabilization pond for settling large-particle-size suspended matters in the water body; constructing an ecological percolation island at the tail end of the stabilization pond, wherein the ecological percolation island is used for removing small-particle-size suspended matters in the water body; constructing a surface flow wetland for removing inflowing suspended matters in the water body, and increasing the transparency of the water body, wherein the percolation dam, the stabilization pond, the ecological percolation island and the surface flow wetland form a four-stage interception system; and constructing shoreside plant zones in areas at two sides of a riverway located at the tail end of the surface flow wetland, wherein the shoreside plant zones and the above four-stage interception system form the five-stage purification system. By constructing the four-stage interception system, the silting risk of the riverway is reduced,and the stability of the structure and the functions of a riverway ecological system is guaranteed; meanwhile, through the five-stage purification system, water is fully purified, the quality of water entering a river is guaranteed to reach the standard, and the purification function of the riverway is improved.

The invention relates to an air purifier and an air purification module thereof. The air purification module comprises a supporting shell, an air inlet, an air outlet, a disk-shaped purification filtering assembly located in the supporting shell, and a center connector. The supporting shell is used for fixedly supporting adjacent air purification modules or adjacent air feeding assemblies. The disk-shaped purification filtering assembly is located between the supporting shell and the center connector. An air inlet cavity is formed between the air inlet and the disk-shaped purification filtering assembly. An air outlet cavity is formed between the air outlet and the disk-shaped purification filtering assembly. Thus, different numbers of air purification modules with different functions can be selected at will to be assembled with a base assembly and the air feeding assemblies to form the air purifier, and different requirements of different users are met.

The invention relates to a material for purifying micromolecule poisonous gases as well as a preparation method of the material, and belongs to the technical field of poisonous gas purification. The purification material comprises spherical carriers and reactive metal oxides; the spherical carriers are flower spherical rear-earth metal oxides, and are formed by weaving flaky petals; the reactive metal oxides are attached to petal clearances of the spherical carriers and petals at the outer layer in a form of nano particles. The material provided by the invention is a poisonous gas purification material, and greatly improves the protection effect of a protective facial mask at normal temperature, has two functions of adsorption and chemocatalysis and decomposition, and has a better protection effect and a purification function, compared with the existing catalytic materials, the service life of the material is prolonged by more than 10 times and meanwhile good antibacterial and sterilizing effects are achieved; the preparation method provided by the invention is mature in synthesis technology; the technical operation is easy to master; the microstructure of a purifying agent is in uniform distribution, and the productivity reaches 80% above.

The invention provides an indoor machine of air conditioner. Its structure includes bottom plate, rear machine shell, front machine shell whose two sides are equipped with air inlet and air outlet, in which the lower side of the described bottom plate is equipped with air suction guide portion, and its upper surface is equipped with lower air inlet with louver and opening and closing device for opening and closing lower side air inlet. Said invention also provides an indoor machine working method of air conditioner for opening and closing air inlet and air outlet.

The invention discloses a heavy metal solidification stabilizing agent for polluted bottom mud and a preparation method thereof. The heavy metal solidification stabilizing agent is prepared from the following components: 10 to 15 parts of sodium silicate, 10 to 12 parts of magnesium oxide, 6 to 9 parts of hydroxy carboxylic acid metal chelating agent, 8 to 10 parts of Ca2O2, 18 to 25 parts of CaO,14 to 16 parts of Al2(SO4)3, 8 to 12 parts of FeO, 25 to 30 parts of bone meal, 10 to 14 parts of chitosan, 10 to 13 parts of chitin and 16 to 24 parts of lactic acid; a preparation method of the heavy metal solidification stabilizing agent comprises the following steps: 1) preparing materials; 2) preparing solid particles and grinding; drying ground mixed powder; 3) mixing the treated mixed powder, the bone meal and the lactic acid and pelletizing. According to the heavy metal solidification stabilizing agent disclosed by the invention, a soil framework and a pore structure of the polluted bottom mud is ensured, the releasing of endogenous pollution is reduced, the pH (Potential of Hydrogen) value is regulated, an ecological habitat of substrate microorganisms is improved, and a continuous self-purification capability on overlying water and the endogenous pollution is recovered.

The invention provides an aerobic biological membrane material, a preparation method and application of the aerobic biological membrane material in a sewage treatment technology, and relates to the technical field of sewage treatment. The biological membrane material comprises a biological carrier material and a microbial agent or activated sludge fixed inside or on the surface of the carrier material; the biological carrier material comprises a polyurethane foam filler and porous spheres; and microorganisms fixed on the biological carrier material are aerobic bacteria. The biological membrane material provided by the invention has the advantages of high membrane forming speed, high efficiency, short time consumption, large microorganism loading capacity and adsorption capacity, good microorganism adhesive force, short starting time of a biological membrane reactor, high sewage biochemical treatment efficiency and good decontamination and decontamination effects, and can be applied to biochemical treatment technologies of garbage treatment sewage, high-ammonia-nitrogen sewage, high-phosphorus sewage and breeding sewage; and the preparation method can accelerate the biofilm formation speed of the biofilm, prolong the service life of the biofilm, realize sewage reduction and reduce the operation cost of a biological reaction system.

The invention discloses a combined type rubber leather bag pump. The combined type rubber leather bag pump comprises a water inlet tube, a rubber leather bag pump body and a water outlet tube, whereinthe rubber leather bag pump body comprises an upper leather bag body, an upper connecting frame, a lower connecting frame and a lower leather bag body; the upper connecting frame consists of a ring frame and two valve seat tubes which are separately connected to the two ends of the top surface of the ring frame; a blocking slot is formed in the bottom surface of the ring frame; a plurality of permanent magnets are uniformly embedded into the blocking slot; a center plate which is connected to the side wall of the ring frame is arranged on the center of the ring frame; a rebound mechanism which is perpendicular to the center plate is connected on the center position of the top surface of the center plate; and the rebound mechanism comprises a sleeve which is connected to the center plate.According to the combined type rubber leather bag pump disclosed by the invention, a conventional integrated type leather bag pump is changed into a rubber leather bag pump body which is formed by mutually blocking and splicing the upper connecting frame and the lower connecting frame, so that the leather bag pump body is conveniently dismounted for being internally cleaned, and therefore, the inner wall of the rubber leather bag pump body is prevented from being polluted, and therefore, cleanness of liquid conveyed by the rubber leather bag pump is guaranteed.

The invention relates to highly safe and reliable refrigeration equipment with a purification function. The highly safe and reliable refrigeration equipment comprises a main body, a water tank and a base, further comprises a stabilization mechanism and a purification mechanism, wherein the stabilization mechanism comprises a driving assembly, a movable plate and two stabilization assemblies; and each stabilization assembly comprises an air suction barrel, a piston, an air suction rod and a suction disc, the purification mechanism comprises a feeding assembly and a pushing assembly, the feedingassembly comprises a feeding box and a communicating pipe, and a first motor, a rotating disc, a rotating rod, a connecting rod and a blocking block are arranged in the feeding box. The highly safe and reliable refrigeration equipment with the purifying function is provided, the base can be adsorbed on the ground through the suction discs and a stabilization mechanism, the equipment is preventedfrom being knocked down, the damage probability of the equipment is reduced, and the safety of the equipment is improved; and water in the water tank can be purified through the purification mechanism, so that the water can be prevented from being stored in the water tank for a long time, and bacteria are bred.

The invention provides a circulating purification device for lubricant oil. The circulating purification device for the lubricant oil comprises a motor gear pump group, an oil conveying pipeline, a filter assembly and two three-way ball valves, wherein one three-way ball valve is arranged at one end communicating with a container for the lubricant oil to be filtered, of the oil conveying pipeline, the other three-way ball valve is arranged at one end communicating with a self-contained oil tank, of the oil conveying pipeline, and the two three-way ball valves are used for controlling on-off of four circulating purification loops of the circulating purification device for the lubricant oil; the filter assembly and the motor gear pump group are both arranged on the oil conveying pipeline located between the two three-way ball valves; the filter assembly is used for filtering the lubricant oil to be filtered, and the motor gear pump group is used for providing power for conveying the lubricant oil to be filtered. On-off of the four circulating purification loops of the circulating purification device for the lubricant oil is controlled through control on the on-off of the two three-way ball valves, thus the utilization rate of the circulating purification device for the lubricant oil is increased.

The invention discloses a security door with an air purifying function. The security door comprises a security door body, an air inlet filter plate is arranged on the outer wall of one side of the security door body, a lock buckle is arranged on the outer wall of the other side of the security door body, a ventilation cover body is arranged on the outer wall of one side of the security door body,a lock ring is fixed to the outer wall of one side of the ventilation cover body, clamping grooves are fixed to the two sides of the inner wall of the security door body, clamping blocks are clamped to the inner walls of the clamping grooves, the same active carbon absorbing layer is arranged on the outer walls of the clamping blocks, a fireproof mechanism is fixed to the outer wall of one side ofthe security door body, a door frame is arranged on the outer wall of the security door body, and a door lock is arranged on the outer wall of one side of the security door body. Through the ventilation cover body, the lock buckle, the lock ring, the clamping grooves and the clamping blocks, the clamping grooves and the clamping blocks are clamped, the active carbon absorbing layer can be mountedconveniently, in addition, the ventilation cover body is opened, the active carbon absorbing layer is conveniently replaced, and convenience of the security door can be improved.