653results about How to "Achieve purification effect" patented technology

The invention relates to a method for cleaner production of sodium vanadate and sodium chromate by pressure leaching of vanadium slag. The method comprises the following steps of: (1) mixing materials, namely mixing the vanadium slag and a solution of NaOH to obtain a reaction material; (2) reacting, namely performing oxidization reaction on the vanadium slag and oxidizing gas in the solution of NaOH under high pressure to obtain solid-liquid mixed slurry of a solution containing NaOH, Na3VO4, Na2CrO4 and water-soluble impurity components, and iron-rich tailings; (3) performing solid-liquid separation; (4) removing impurities; (5) crystallizing sodium vanadate; and (6) crystallizing sodium chromate. The method is easy to operate and is high in safety; and the operating temperature is greatly lower than the temperature of the traditional vanadium extraction process, energy consumption is low, the high-efficiency co-extraction of vanadium and chromium is realized, and the extraction rate of vanadium and chromium is over 95 percent.

The invention relates to a regulation and storage design and model verification method for mountain parks built on the basis of sponge city concept. The method comprises following steps: A. determining the annual runoff volume control rate of a mountain park; B. initially bringing up LID module control indexes according to the annual runoff volume control rate of a mountain park; C. calculating the regulation and storage volume of each LID module according to the LID module control indexes, adjusting the LID module control indexes so that the regulation and storage volume of gray regulation and storage devices is no more than a preset value and obtaining the regulation and storage volume of the LID module; D. module layout; E. model analysis. The method puts the idea of sponge city into practice comprehensively; the construction of mountain parks and the building of sponge city are integrated; the design method of constructing sponge parks is further fulfilled so as to realize natural accumulation, penetration and purification of rainwater by the mountain parks.

The inventive air-conditioning system comprises refrigeration and solution cycle systems. The refrigeration cycle system has a compressor, an evaporator, an expansion valve and a condenser. The solution cycle system has a dehumidifier, a regenerating unit, a solution reservoir, a solution pump, a mixed solution valve and a control valve. Because of adding a solution cycle system, the invention can realize the accuracy independent control of temperature and humidity.

The invention provides a fuel cell system and a method of generating electricity and reducing heavy metal through sewage treatment. The system comprises a bioreactor, wherein the bioreactor comprises a negative chamber and a positive chamber, a negative electrode and a positive electrode are separately arranged in the negative chamber and the positive chamber, the two chambers are provided with microbial active material and are separated by a proton exchange membrane, the sewage is introduced to the positive chamber of which microbial active material is used to treat the sewage, the negative chamber contains heavy metal ion solution and reduces heavy metal ions, the inside of the positive chamber generates electrons and electrons, and the electrons migrate to the negative chamber through the proton exchange membrane so that current is generated between the two chambers in the reactor and the bioreactor can treat the sewage while generating electrical energy. In the system and method, the heavy metal ion solution is used as electron acceptor so that oxygen is not needed to be filled; and the whole system has simple structure, low cost and easy operation and heavy metal can be recycled from the negative solution.

The invention relates to a method and a device for extracting heavy metal ions from soil, which are used for extracting heavy metal ions from the heavy metal polluted oil. The method comprises the following steps of: forming a heavy metal ion adsorbent by adopting a compound containing carbon nano fibers, active carbon, a cationic surface active agent, acrylamide, potassium acrylate, sludge particles and potassium sulfide; putting the heavy metal ion adsorbent in a porous hard shell to form a porous hard plastic bag; and embedding the porous hard plastic bag into soil for extracting the heavy metal ions. The method and the device for extracting the heavy metal ions from soil aim at the problem of severe pollution of Cd, Cr, Cu, Hg, Pb and Zn of the soil and can effectively absorb, passivate, solidify and extract active ions such as Cd2+, Cr3+, Cu 2+, Hg2+, Pb2+, Zn2+, and the like in plow layers of the soil, maintain microzone water of the soil, release a certain K+ ions and realize the update, the purification and the circular treatment of the absorbent in the device for extracting the heavy metal ions.

The invention discloses a variable-frequency variable-pressure electronic type efficient air purifier. The variable-frequency variable-pressure electronic type efficient air purifier comprises a primarily efficient filter screen positioned at the front end, wherein an insulating framework is arranged behind the primarily efficient filter screen; a PCB pin base, an ion emission pin and a grounding stainless steel plate are arranged in the insulating framework from front to rear in sequence; the ion emission pin is connected to a variable-frequency variable-pressure type ion generator; an ion air outlet which corresponds to the ion emission pin is arranged on the grounding stainless steel plate; a honeycomb type electrostatic electret filter screen is arranged behind the insulating framework; and the polarity of charge of the honeycomb type electrostatic electret filter screen is reverse to that of charge released by the variable-frequency variable-pressure type ion generator. The variable-frequency variable-pressure electronic type efficient air purifier realizes various functions of condensation, electrostatic adsorption, sterilization and fitness on fine particles in air, and also avoids obvious defects of high noises, much peculiar smell and high energy consumption of the conventional purifying technology.

The invention discloses a sludge drying and incinerating integrated zero-discharge treatment system and treatment process, belonging to the technical field of harmless treatment of sludge. The treatment system is composed of a garbage storage pit, an air separation device, a garbage-sludge incinerator, a cyclone separator, a waste heat boiler, a bag-type dust remover, a turbo-generator set, a two-stage drier, a dried sludge storage bin, a fine powder separator, a condenser, a steam-water separator, and a carbon dioxide purifying and catching system. According to the invention, the dried sludge burns sufficiently in oxygen-rich atmosphere, the auxiliary fuel is saved, the incinerating waste heat is efficiently recovered and utilized, CO2 in discharged flue gas is cooled, purified, compressed and liquefied to ultimately obtain high-purity CO2 which can be used for industrial application, other impurities are recovered, dioxin and other extremely toxic substances are collected separately and conveyed to qualified divisions for unitized treatment, the purposes of treating a waste with another waste and promoting harmless treatment with resource treatment are realized, the waste treatment cost is lowered and the energy utilization rate is improved.

The invention discloses a sponge city rainwater collecting, purifying and utilizing combination system which comprises a roof rainwater collecting area, a road rainwater collecting area, a greenbelt rainwater collecting area, a water collecting and sand settling tank, a purifying device and an impounding reservoir. An evaporation preventing layer, a soil layer, a water supply layer and a purifying layer are sequentially arranged on the roof rainwater collecting area from top to bottom. Transverse and longitudinal water collecting pipes are arranged in a bottom gravel layer of the road rainwater collecting area. An evaporation preventing layer, a soil layer, a rough sand layer and a purifying layer are sequentially arranged in the greenbelt rainwater collecting area from top to bottom. A filtering grid is arranged in the middle of the impounding reservoir, a water inlet hole and a water overflow hole are formed in the upper portion of the impounding reservoir, and a water drawing pump is arranged at the bottom of the impounding reservoir. The city environment can be greened and beautified, city rainfall flood pressure can be relieved, pollutants in rainwater can be absorbed, water resources can be saved, the rainwater utilization efficiency can be improved, and important reference significance is achieved on sponge city non-point source pollution control and city water shortage relieving.

Provided is an in-car air quality monitoring and purification regulating system. A storage battery and three devices respectively powered by the storage battery are installed in a car. The three devices are a ventilating device, an adsorption and filtering device and a heating device. A temperature and humidity sensor, a formaldehyde sensor, a carbon monoxide sensor, a total volatile organic compound sensor and an inhalable particle sensor which are installed in the car are respectively connected with a system control module, and the system control module comprises a sensor signal processing circuit and a power supply on-off control circuit for the three devices. The system can monitor indexes such as in-car air quality and temperature and humidity in real time and start the three devices according to the index overproof conditions; the indexes can also be uploaded through the wireless network to a mobile by the system control module to be displayed in real time; the mobile phone can send instructions to the system control module according to users' requirements to start or shut down the three devices in real time, and purification adjustment of in-car air is achieved.

The invention discloses a comprehensive technology for the ecological restoration of low-pollution river water. The technology constructs the low-pollution river water environment comprehensive control engineering treating flowing water as a base, treating ecological restoration as a core and giving consideration to the landscape improvement through the integration and optimization of ecologic restoration combination techniques comprising a water power control technique, a polluted basement restoration technique, an underwater microtopography shaping technique, an aquatic plant recovery technique, an aquatic animal restoration technique, an aquatic life reinforcement technique, a water landscape construction technique and the like. The comprehensive technology has a good pollutant removal performance, and the TN, NH3-N and TP reductions reach 75.5%, 84.5% and 92.0% respectively.

The invention discloses a hydrodynamic-cavitation enhanced water treating apparatus, comprising a pretreatment unit, an enhanced cavitation formation device, a water feedback cycle treatment loop, a multi-parameter water quality detection / display system and a smart automatic control system, wherein the multi-parameter water quality detection / display system is composed of a pressure sensor, a redox potential sensor, a flowmeter, a pH sensor, a conductivity sensor, a dissolved oxygen sensor, a chemical oxygen demand sensor, a total organic carbon sensor, a temperature sensor and an LED (Light-Emitting Diode) touch display screen, all of which are orderly mounted in a water outlet pipeline; the two ends of the water feedback cycle treatment loop are connected to the front section of a water outlet electromagnetic valve and the front end of a water pump of a water inlet pipeline, respectively; and the water outlet electromagnetic valve and a cycle-treatment electromagnetic valve are connected to a programmable controller, respectively. The hydrodynamic-cavitation enhanced water treating apparatus is used for water treatment and purification, and realizes online detection and display of a plurality of water quality parameters and operating parameters therein and automatic control on the operation thereof by means of a plurality of sensors.

The invention provides a purification material of gas-state pollutants. The purification material takes an adsorption material as a carrier; titanium dioxide, manganese oxide and reduced-state noble metal are loaded on the carrier, wherein the loading amount of the titanium dioxide is 0 to 60 percent of the mass of the adsorption material; the loading amount of the manganese oxide is 0.1 to 10 percent of the mass of the adsorption material; the loading amount of the reduced-state noble metal is 0.01 to 1 percent of the mass of the adsorption material; the reduced-state noble metal is one or two or more than two of platinum, palladium, gold and silver; the titanium dioxide is modified by adopting an ion doping modification manner and a photocatalyst is loaded by the adsorption material with a high adsorption property, so that a composite catalyst with high efficiency, low cost and no secondary pollution is prepared; the composite catalyst can be used for purifying VOCs (Volatile Organic Chemicals) including formaldehyde, benzene, toluene and the like in indoor air and eliminating O3 gas-state pollutants under room temprature; the disadvantage of an existing air purification technology that the efficiency of removing the gas-state pollutants is low is overcome.

The invention provides an alga-calcium-mineral air purification medium. The air purification medium is mainly prepared from, by weight, 42-48.44 parts of alga mineral powder, 4.2-9.8 parts of calcium powder, 0.8-1.2 parts of catalysis powder, 2.4-3.0 parts of mineral modifiers, 36-48 parts of liquid-phase media and 1.5-1.8 parts of photocatalyst. The raw materials are subjected to pre-stirring, hole forming and granulating, polishing and oxidation, primary drying, photocatalyst surface treatment and secondary drying to form particle medium carriers. The air purification medium has the advantages that the absorption-catalysis-purification performance is outstanding, the preparation process is mild and free of rigorous requirements, product application is flexible, and an air purification device with de-odoring, deodorization, taste removal or bacteria resistance and mildew-proof functions by applying appropriate matched application components.

The invention discloses an adaptive air conditioner on the basis of wearable equipment. The adaptive air conditioner has the advantages that physical sign parameters of users are acquired by the aid of the wearable equipment, indoor and outdoor temperature, indoor humidity and indoor and outdoor air quality evaluation values are obtained by the aid of an indoor temperature sensor, an outdoor temperature sensor, an indoor humidity sensor, an indoor air detector and an outdoor air detector, are transmitted to a central control system and are judged by the central control system according to preset comfortable temperature ranges, comfortable humidity ranges and comfortable air quality ranges, temperature regulation, humidity regulation and air quality regulation are respectively controlled by the central control system, accordingly, the temperatures and the humidity can be automatically intelligently regulated by the adaptive air conditioner, air can be purified by the adaptive air conditioner, the practicality of the adaptive air conditioner can be improved, and the indoor environment comfort can be guaranteed for the users.

The present invention relates to an indoor air purification method. The method can separate out the microfine granular substances (including bacteria, cigarette smoke and fume, etc.), volatile organic compound ando ther harmful gas from indoor air or purify it so as to obtain clean indoor air. It includes the following steps: utilizing fan to make the air to be purified pass through coarse filtering screen fistly to remove large granules and fibre, then making said air be fed into high-voltage electric field and be passed through the filtering layer, finally be fed into adsorption catalytic bed to completely remove harmful components indoor air.

The invention discloses on-line purification equipment for a metal machining fluid and a purification method thereof. The equipment comprises a purification fluid tank, a stock solution tank, a magnetic separation pool, a magnetic slag tank, a drum type multi-stage magnetic separation device, a gas-liquid mixing pump, an ozone generator, an ozone copolymerization air-float sterilization separation device and a Y-shaped water outlet pipe, wherein the drum type multi-stage magnetic separation device adopts a drum-shaped structure, the inner wall of the drum is embedded with a plurality of same permanent magnets at certain intervals along the same axial direction; and the inside of the ozone copolymerization air-float sterilization separation device is orderly provided with a grid, a baffle plate and an ozone contact generator from bottom to top, and the upper part of the ozone contact generator is a separation zone. The method comprises the main steps of magnetic separation, gas dissolution, sterilization and water and slag discharge. The method has the advantages of realizing the on-line circular purification and use of the machining fluid, prolonging the service life of the machining fluid, greatly reducing the amount of waste fluid generated and achieving the aims of water conservation, emission reduction and clean production.

The invention discloses a closed-type constant-temperature multi-layer water circulation turtle cultivation system which comprises a multilayer turtle cultivation pool devices, a cultivation water environment adjusting device, an indoor air environment adjusting device and a cultivation system operation control device, wherein the multilayer turtle cultivation pool device comprises a plurality of turtle cultivation pools, circulating water return pipes, circulating water outlet branch pipes and main circulating water outlet pipes, primary solid liquid precipitation devices, blow-down valves and pollution discharge blow-down pipes; the cultivation water environment adjusting device comprises a solid-liquid separator, a blow-down valve, a sterilizer, a protein separator, a biological filtering device or tank, a circulating pump and a water heating device; and the indoor air environment adjusting device comprises an air heating device, an air oxygenating device and an insulation building. According to the closed type constant-temperature multi-layer water circulation turtle cultivation system, turtle cultivation environments can be comprehensively controlled, the land, the water and the energy are saved, an optimal ecological environment suitable for turtles to rapidly grow is established, turtle cultivation is free of drugs, and healthy and safe food sanitation requirements are met.

The invention discloses a campus rainwater ecological cleaning integrated-processing method and an ecological cleaning integration system. The method comprises the following steps: 1) establishing an integration processing system for processing campus rainwater in a campus in advance; 2) selecting a proper processing method according to ecological purification conditions of different water bodies in the campus; and 3) finally collecting rainwater processed in the step 2) to a landscape water body in the campus, or discharging into a river in the campus, or collecting into the underground water layer of the campus. The system comprises an undercurrent type artificial wetland system for processing campus initial-stage rainfall runoff, a shoreland-area closure system for processing campus storm runoff, an ecological floating bed-aeration plug-flow system for processing campus natural revetment river water body, an artificial waterweed-micropore aeration system for processing campus hard revetment river water body, and a biomanipulation-fountain aeration system for processing campus enclosed pond water body. The beneficial effects comprise that the purification effect is good, the cost is low, the resource utilization rate is high and the purification effect is lasting.

The invention discloses a liquid flinging device. The liquid flinging device comprises a liquid flinging assembly, wherein the liquid flinging assembly is used for converting liquid supplied to the liquid flinging assembly to a three-dimensional liquid field in a three-dimensional space in which the liquid flinging assembly is located, the three-dimensional liquid field comprises at least one of a three-dimensional liquid droplet field and a three-dimensional liquid film field, the three-dimensional liquid droplet field is formed in a manner that liquid droplets of one or more particle sizes are distributed in a preset mode, and the three-dimensional liquid film field is formed in a manner that a liquid film is formed on the liquid flinging assembly. According to the liquid flinging device, the three-dimensional liquid droplet field and / or the three-dimensional liquid film field which is distributed according to the preset mode can be generated, namely, at least one of the three-dimensional droplet field which is orderly distributed in the preset distribution mode and the three-dimensional liquid film field which is orderly distributed in a preset state in the preset distribution mode can be generated, so that the purification effect can be comprehensively, pointedly, efficiently and rapidly realized.

The invention provides a fresh air purifying system. The fresh air purifying system comprises purifying equipment, an air supply pipe communicating with the purifying equipment, and a temperature and humidity controller mounted outdoors and communicating with the air supply pipe, wherein branch pipes leaded to indoor independent rooms are branched from the air supply pipe. The fresh air purifying system further comprises an environment detector, a temperature sensor mounted indoors, a humidity sensor mounted indoors, valves mounted in all the branch pipes and with controllable air volumes, and a controller. Outdoor fresh air is purified as clean and fresh air through the purifying equipment; the clean and fresh air is taken into different rooms through the branch pipes; and according to the air quality in indoor rooms detected by the environment detector, the controller controls the openness of the valves on the branch pipes leaded to the independent rooms, and controls the air supply quantity send in the independent rooms as needed, so that the air supply power is reasonably distributed, a central ventilation system is efficiently operated, the air purification and the temperature / humidity adjustment are realized, and independent fresh air control can be performed on each independent room.

The invention belongs to the technical field of coating preparation. A preparation method of a coating for a melting crucible comprises the following steps of: pre-drying the melting crucible; preparing a suspension by adopting a PVP (Polyvinyl Pyrrolidone) absolute ethanol solution and silicon nitride; uniformly spraying the suspension on the inner wall of the melting crucible; and pre-burning the melting crucible with sprayed coating to form a silicon nitride coating with uniform thickness and compact structure on the inner wall of the melting crucible. The method has the advantages that: the melting crucible is pre-dried and cleaned before being sprayed to contribute to adhesion of the coating; the PVP absolute ethanol solution is added to the suspension of the coating, the absolute ethanol is evaporated after the crucible is dried, the adhesive PVP leads the coating to be adhered on the inner wall of the crucible, and the coating has higher adhesive force, so that the crucible is prevented from reacting with and adhering melt, smooth demolding of ingots is realized, impurities are prevented from entering melt, the purification effect of the melt is realized, and the using requirement for the coating in a casting process is fulfilled.

The invention provides indoor air detection and purification intelligent home furnishing based on internet of things. After a purification module is started, the purification module is used for purifying indoor air; after a detection module is started, the detection module is used for detecting indoor air quality in real time, and air quality data are obtained and are transmitted to a processing module; the processing module analyzes and processes the received data and controls the detection module and the purification module to be started or closed; and according to the intelligent home furnishing, functions of real-time detection and purification of the indoor air are achieved, the indoor air quality data are collected and transmitted in real time, and a user can know the indoor air quality condition in real time; and according to a control method of the indoor air detection and purification intelligent home furnishing based on the internet of things, indoor air automatic detection and purification can be achieved, and a room can be kept under the good air environment in real time.

The invention relates to a vertical efficient purification and humidity regulator for indoor air, comprising a shell, wherein the inside of the shell is divided into a rotary wheel humid cabinet, an ozone oxidation chamber, a photocatalytic reaction chamber and an adsorption chamber in turn from bottom to top; the inside of the rotary wheel humid cabinet is provided with a ring-shaped humidifying rotary wheel, the bottom of the rotary wheel humid cabinet is provided with a water tank which can submerge the bottom of the humidifying rotary wheel, the inside of the ozone oxidation chamber is provided with an ozone UV lamp, a filter layer is arranged on the lower part of the ozone UV lamp, the inside of the photocatalytic reaction chamber is provided with a photocatalytic UV lamp, the upper part and the lower part of the photocatalytic UV lamp are respectively provided with a photocatalyst filter screen, the inside of the adsorption chamber is provided with an adsorption layer, the upper top of the shell is provided with an air outlet, the side of the lower part of the shell is provided with an air inlet connected with space in the middle of the humidifying rotary wheel, and the body of the humidifying rotary wheel is made of porous materials. The invention has simple structure and convenient use, has very high purification rate to volatile organic gases and is mainly suitable for the purification and humidity regulation of the indoor air.

The invention belongs to the technical field of wastewater treatment, particularly relates to a treatment method of wastewater anaerobic digestive fluid in a pig farm. The invention uses a water hyacinth pond for removing most of the ammonia nitrogen of wastewater anaerobic digestive fluid in a pig farm, later adopts large-scale emergent aquatic plant pond of water bamboo, reeds, and the like, combines artificial float grass and functional microbial inoculum for purifying the yielding water again so as to lead the concentration of ammonia nitrogen in the yielding water to be further reduced, and then adopts an aquatic animal breeding pond with landscape value for purification treatment. The invention not only can achieve standard discharge of the intensive pig farm wastewater anaerobic digestive fluid, but also can create economic benefits by the aquatic economic plants and aquatic animals in the pond and achieve water resource.

The invention relates to a moisture recycling supersonic speed gas-purification separation device for moisture recycling, dehydration, liquid removal, purification and separation; the device comprises a convergent divergent nozzle, a recycling port, a recycling separation cavity, a straight length and a diffuser pipe; the left end of a tapering section of the convergent divergent nozzle is provided with a moisture inlet, the right end thereof is connected with an inner shell body in the straight length by the diverging section of the convergent divergent nozzle, a swirler is arranged in the inner shell body of the straight length, and the right end of the swirler is provided with a swirler fixed sleeve which is hollow, and the right end of the swirler fixed sleeve and the left end of the inner shell of the diffuser pipe form a ring-shaped channel. The recycling separation cavity is formed between the straight length and the diffuser pipe, the recycling port is arranged on the wall surface of the inner shell body of the straight length, so as to effectively lead liquid drops in the remaining recycling gas to be separated out in a swirling way. The device realizes moisture recycling, purification and separation, so as to improve the separation efficiency and environmental-protection benefit; furthermore, the device has the advantages of no chemical pollution, environmental protection and energy saving, compact structure and high circulating and utilizing value.

The invention provides a 3D (Three-dimensional) structural functional composite air purification filter element. The filter element is of a three-layer structure, namely, a filtering layer, an adsorption layer and a sterilizing layer which are arranged in sequence; material adopted includes non-woven fabrics, active carbon fibers and nano-silver non-woven fabrics. According to the 3D structural functional composite air purification filter element, the adopted structural functional non-woven fabrics show obvious adsorption to suspended particles and PM2.5 (Particulate Matter 2.5); the active carbon fibers are clamped between the two non-woven fabrics layers, so as to solve the problem that small granules easily leak while the granular adsorbing materials are adopted; nano-silver added on the non-woven fabrics solves the problem that a traditional air purification filter element has no sterilization effect. Compared with the traditional air purification filter element, the 3D structural functional composite air purification filter element has the advantages that the problems of dregs, difficult cleaning and incapability of sterilization and disinfection of the existing air purification filter element are solved; in addition, the drag coefficient is small, the purification efficiency is high, the sound can be absorbed, the cleaning is easily carried out, the sterilization effect is achieved, and the mass is small.

The invention relates to a method for simultaneously extracting and purifying a plurality of types of chlorinated polycyclic aromatic hydrocarbons in soil. The method comprises the following steps of: pre-treating a soil sample, namely putting a pre-frozen soil sample into a freezing dryer, and freeze-drying to remove moisture; grinding the freeze-dried soil sample and sieving with a 200-mesh sieve to prepare soil for later use; accelerating solvent extraction; extracting a target matter by utilizing a water solution under high temperature and high pressure to obtain an extracting solution; after diluting the extracting solution for 5 times, carrying out concentration and purification by adopting an Oasis HLB solid-phase extraction column; carrying out rotary evaporation and nitrogen blowing concentration on the concentrated and purified extracting solution; after replacing a solvent, making the volume constant; then transferring the extracting solution into a small bottle for detecting; and detecting the sample in the small bottle by utilizing a gas chromatographic-mass spectrometry. By combining a plurality of types of technologies including subcritical water solution-solvent extraction acceleration, solid-phase extraction, concentration and purification, and gas chromatographic-mass spectrometry detection and the like, simultaneous extraction, purification and determination of eight types of the chlorinated polycyclic aromatic hydrocarbons in the soil can be realized.

The invention discloses a method for freshwater culture of penaeus vannamei by using a bio-flocculation technology. According to the method, lactic acid bacteria and bacillus subtilis organisms are utilized, through aeration, bio-flocculation is quickly cultured and generated, the purification effect on water quality can be achieved through the assimilation of heterotrophic bacteria in the cultureprocess of penaeus vannamei, and meanwhile crude proteins, crude fat and other nutrients required by penaeus vannamei are increased; the utilization rate of feed can be increased, and the feeding amount is reduced; in addition, by gradually reducing the salinity of a water body, the culture environment can be adjusted slowly to avoid negative effects caused by salinity change fluctuation on culture organisms in the environment, the culture quality and yield are improved, and the adaptability of penaeus vannamei to the environment is improved.

An air purifier for indoor ventilation purification and circulation purification comprises an air purifier box, an outdoor air duct, an outdoor air inlet, a room A return air inlet, an indoor return air inlet, a room A air supply outlet, a mixed-air duct, a fan, a purifier I and a purifier II. The air purifier for the indoor ventilation purification and the circulation purification is characterized in that a room B return air inlet and a room B air supply outlet can be further arranged apart from the room A return air inlet and the room A air supply outlet; the outdoor air duct is connected with the outdoor air inlet, the room A return air inlet and the room B return air inlet are communicated with the indoor return air inlet, one side of the mixed-air duct is connected with the outdoor air inlet and the indoor return air inlet, the other side of the mixed-air duct is connected with one side of the purifier I, the other side of the purifier I is connected with one side of the fan, the other side of the fan is connected with one side of the purifier II, and the other side of the purifier II is connected with the room A return air supply outlet and the room B air supply outlet. The air purifier can be connected to a temperature and humidity regulator, so that the whole indoor air can meet comfort requirements for purification, oxygen enrichment and moderate temperature and humidity.

The present invention discloses a quaternary hybrid magnetic composite functional material and a preparation method thereof. The composite material is a quaternary hybrid of Ag@AgX, reduced graphene oxide and magnetic nanomaterials. First, the surface of the rGO is sequentially in situ deposited with Fe3O4, MnFe2O4, ZnFe2O4, CoFe2O4 and other iron-based magnetic nanomaterials and grown with AgX precipitate so as to obtain rGO / MFe2O4 / AgX ternary complex nanomaterials; and then the ternary complex nanomaterials are exposed to a mercury lamp to obtain the quaternary hybrid magnetic composite material rGO / MFe2O4 / Ag@AgX. The material not only has the magnetically responsive property and externally applied magnetic field controllability of magnetic particles, the high adsorption performance, electrical conductivity and other properties of graphene nanomaterials, the photocatalytic property of plasma material Ag@AgX, but also has the surface enhanced raman spectroscopy activity of Ag particles, and the synergistic effect between Ag@AgX and graphene materials enhances the photocatalytic property of Ag@AgX and the SERS activity of Ag, so that the detection limit of the substance to be detected is increased. The material has great potential application value on one-step concentration, magnetic separation, SERS detection and in situ photocatalytic degradation and other aspects of low concentrations of benzene ring organic pollutants in water.