700results about How to "Realize solid-liquid separation" patented technology

The invention discloses a harmless treatment method for urban garbage incineration fly ash. Due to the adoption of a treatment system and a method disclosed by the invention, heavy metals in incineration fly ash can be effectively stabilized and dioxin can be degraded; the leaching toxicity of heavy metals is fully accordant with the national standard; the toxicity of dioxin is removed by 99.9 percent; and meanwhile, the chloride ions in fly ash can be effectively removed, salt substances are recovered, and zero discharge of waste liquids is ensured. A process and the method have the remarkable characteristics of energy saving, environmental friendliness, remarkable economic benefit and remarkable social benefit; and meanwhile, the treated fly ash has novel physicochemical properties, canbe applied to the industries of environmental protection, construction and the like, and has application and popularization values.

An environmentally-friendly medical waste treatment device comprises a base, a treatment box is arranged on the upper end of a pillar, a crushing mechanism is arranged on the upper side of the inner part of the treatment box, a filter screen is arranged on the inner part of the treatment box, a vibration mechanism is arranged at the lower end of the filter screen, a cleaning mechanism is connectedto the left side wall of the treatment box, a conveying mechanism is installed on the upper end of a frame, and a collection mechanism is arranged on the right side of the upper end of the base. Thedevice is reasonable in structure and design, wherein a first crushing roller and a second crushing roller rotate relatively through a counterclockwise first motor to crush medical wastes; the filterscreen realizes solid-liquid separation, and a second motor drives a cam to rotate to slightly vibrate the filter screen, so that the efficiency of the solid-liquid separation is improved; a water pump sprays disinfectant through a spray nozzle to the medical wastes for disinfection treatment; an electromagnet in a sieving room can adsorb and screen some metal needles or scissors in the wastes, sothat the waste of resources is avoided, the rest of the wastes finally enter a collection box for compression, the volume of the wastes is reduced, and the transportation is convenient.

The invention provides a system for enriching denitrified anaerobic methane oxidized microorganisms and a method thereof. The system comprises a hollow fiber membrane reactor which comprises a shell, an upper flange arranged at the top end of the shell and a lower flange arranged at the bottom end of the shell. A water inlet is arranged on the lower part of the shell, a sampling opening is arranged in the middle, and a water outlet is arranged on the upper part. The upper flange is provided with an air outlet and the lower flange is provided with an air inlet. The shell is internally provided with a hollow fiber membrane beam which is closed at the upper end and opened at the lower end and is connected with the air inlet. A methane supply device is connected with the air inlet of the hollow fiber membrane reactor. A water supply device is connected with the water inlet of the hollow fiber membrane reactor. Through the system provided by the invention, inoculums are added. The system operates according to a sequence mode and a continuous flow mode, so that the utilization ratio of methane is improved, and the enriching time of denitrifying anaerobic methane oxidation microorganisms is shortened.

The invention discloses a solid-liquid separation device and a method for producing Hopcalite, relating to the field of solid-liquid separation devices of chemical reaction products and catalyst preparation. The device comprises a sealed tank, wherein a feed opening is formed in the top of the sealed tank, a filtering layer is arranged at the lower middle part in the sealed tank, a rotating shaft is arranged on the outer side of the sealed tank, and the rotating shaft is a hollow shaft and is connected with a power overturning device; the upper side of the filtering layer in the sealed tank is connected with an air compressor through the rotating shaft and an air compression pipeline; a drain valve and a drain pipeline are arranged at the bottom of the sealed tank, the other end of the drain pipeline is connected with a gas-liquid separator, the top of the gas-liquid separator is connected with a vacuum pump through a vacuum pipeline, and a liquid outlet is formed in the bottom of the gas-liquid separator; the air compression pipeline is connected with the drain pipeline through a pipeline, and valves, liquid inlet valves and air compression valves are respectively arranged on the pipeline, the drain pipeline and the air compression pipeline. The device is good in solid-liquid separation effect and is high in production efficiency; when the device is used for producing Hopcalite, the cost is low, the production cycle is short, potassium sulfate and sodium sulfate can be respectively recovered, and thus the potassium sulfate and the sodium sulfate can be recycled.

The invention relates to a reaction and solid-liquid separation integrated device which is developed based on long-term engagement in research on separation of wolfram and molybdenum and liquid-solid multiphase reaction, can be used in various liquid-solid multiphase reaction processes such as ion exchange, adsorption, sedimentation, crystallization, displacement, and the like, and is successfully applied for the first time in separating and reclaiming wolfram or molybdenum from wolframate solutions. The reaction and solid-liquid separation integrated device comprises an upper cover, a bottom and a cylindrical body. A stirring paddle is fixed in the center of the upper cover by an axial seal structure and is arranged in the cylindrical body; the bottom comprises a concave shell, a microporous filter plate and a liquid outlet; the microporous filter plate made by hydrophobic materials is arranged on the top of the concave shell, and the liquid outlet is arranged at the bottom of the concave shell; an air intake connected with an air compressor is arranged on the upper cover. The reaction and solid-liquid separation integrated device can considerably reduce loss of a solid phrase or loss of comparatively high-value substances contained in a liquid system during solid-liquid separation.

The invention relates to an advanced treatment method of an ethylene waste lye, and belongs to the sewage treatment field. The method comprises the following steps: 1, adjusting the pH value of a wet-oxidized ethylene waste lye to a predetermined value; 2, carrying out primary aerobic biochemical treatment of the wastewater obtained in step 1 in a primary aerobic biochemical treatment pool; 3, carrying out Fenton oxidation treatment of the wastewater obtained in step 2; 4, adjusting the pH value of the wastewater obtained in step 3 to a predetermined value; and 5, carrying out secondary aerobic biochemical treatment of the wastewater obtained in step 4 in a secondary aerobic biochemical treatment pool, precipitating, and discharging the obtained supernatant. The method has the advantages of good ethylene waste lye treatment effect, short treatment flow, simple operation and stable running.

The invention relates to a building garbage treatment device. The building garbage treatment device comprises an impact chamber, a bulk metal collecting box, a coarse crushing cavity, a small-block metal collecting box, a fine crushing cavity, a magnetic separation chamber, an iron powder collecting box, a water floating separating chamber, a float collecting chamber and a building material collecting box. By arranging sequential parts of impact, separating, coarse crushing, separating, fine crushing, magnetic separation, water floating separating and the like, decorating building garbage canbe refined and classified, and thus the problems of recovery and disposal of the building garbage can be well solved.

The invention provides a carbon-based magnetic mesoporous composite microsphere and a preparation method thereof, belonging to the technical field of the preparation of an inorganic composite material. The diameter of the carbon-based magnetic mesoporous composite microsphere particle is 3-6 microns, the specific surface area of the microsphere is 270-315 m2 / g, the pore diameter is 4-8 nanometers, and the pore volume is 0.15-0.31 cm3 / g. The preparation method comprises the following steps: firstly, synthesizing an FexOy / carbon-based composite microsphere; and then, preparing the gamma-Fe2O3 / carbon-based magnetic mesoporous composite microsphere. The invention has the following obvious advantages: the FexOy / carbon-based composite microsphere is synthesized in one step, the activation and magnetization are synchronously carried out, and the obtained material has a simplex magnetic component, is in a mesoporous structure and has a large specific surface area. The preparation method of the mesoporous carbon-based magnetic composite microsphere is simple and easy to control magnetically, can be used as a micro adsorbent or magnetic targeted drug carrier, and has potential application value in delivery and separation processes.

The invention relates to a technique for integrated two-stage strengthened air-flotation separation of dense algae slurry. The technique comprises that: collected dense algae slurry first enters a first-stage air-flotation tank where algae and high-density micro-bubbles have contact with and adhere to each other so as to separate algae and water and remove about 50 to 80 percent of algae, and then water enters a second-stage strengthening air-flotation tank, is added with an appropriate amount of flocculant, and then is subjected to air-flotation treatment again so as to remove the remaining algae and other suspended substances in the water. The invention not only applies to the disposal of dense algae slurry, but also can be used to treat algae-rich water low in algae content. The invention has the advantages of effectively removing blue-green algae in water, transferring nitrogen, phosphorus and other nutrient loads in water, purifying water, preventing the explosion of blue-green algae and providing an effective method and a device for controlling the pollution of lakes and reservoirs.

The invention provides a nano-grade ZnO loaded magnetic biological carbon composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: step 1: carrying out thermal hydrolysis on a biomass under an alkaline condition to extract plant fibers; after drying, carrying out pre-carbonization treatment; mashing and sieving with a sieve with the size of 10to 20 meshes; step 2: mixing a ferrous salt solution and a potassium hydroxide solution; adding soluble zinc salt; step 3: adding the sieved plant fibers into the solution formed by step 2; uniformlymixing and adding a potassium nitrate solution; after sufficiently stirring, treating a mixture in a water bath; continuously stirring and ageing until black gel is formed, so as to obtain a black gel solution; step 4: after washing and drying the black gel solution, generating dry gel; calcining the dry gel and continuously introducing inert gas; after washing and drying, obtaining the nano-grade ZnO loaded magnetic biological carbon composite photocatalyst. According to the nano-grade ZnO loaded magnetic biological carbon composite photocatalyst, magnetic biological carbon is used as a carrier of the photocatalyst, and the problem that the photocatalyst in chromium-containing sewage treatment is difficult to separate and recycle is solved.

The invention belongs to the technical field of water treatment, and particularly relates to a steel pickling waste water resourcization and zero discharge process. The steel pickling waste water resourcization and zero discharge process comprises the following process steps of: (a) introducing steel pickling waste water; (b) carrying out Fenton reaction on the steel pickling waste water to reduce the COD (Chemical Oxygen Demand) of the steel pickling waste water to be less than or equal to 60 mg / L, convert Fe<2+> into Fe<3+> and reduce TDS (Total Dissolved Solids) to be less than or equal to 2000 mg / L; (c) carrying out FeC microelectrolysis reduction reaction on the steel pickling waste water; (d) carrying out neutralization flocculation; (e) desalting a membrane assembly to reduce the TDS of the steel pickling waste water to be less than or equal to 200 mg / L; (f) recycling effluent water. The steel pickling waste water resourcization and zero discharge process disclosed by the invention realizes the cleaning production, realizes the resourcization utilization of waste water, waste acid and iron mud, generates the benefit and realizes the zero discharge.

The invention discloses a kitchen waste crushing device capable of realizing a solid-liquid separation function, and belongs to the field of recycling treatment of household garbage. The device comprises a shell, crushing rods, a discharge port, a cover plate, a base and a liquid drainage pipe, wherein the shell is horizontally arranged above the base; a crushing cavity and a sewage cavity are formed in the shell; the base is arranged right below the shell; the shell is fixedly connected with the base through supporting columns; a feeding device is arranged at the top of the shell; the cover plate is arranged at the left end of the shell; a rotating shaft is horizontally arranged on the center line of the crushing cavity; the left end of the rotating shaft penetrates through the cover plate through a bearing and is connected with a transmission device; a feeding tank is fixedly arranged on the top of the left side of the shell; the interior of the feeding tank is provided with a crushing motor through a fixing frame; and a material guide cone is fixedly arranged at the top end of the crushing motor. According to the kitchen waste crushing device capable of realizing the solid-liquid separation function, the device is reasonable in structural design, low in noise and capable of realizing the solid-liquid separation function for kitchen waste in the crushing process, the kitchen waste is thoroughly and uniformly crushed, and later treatment is facilitated.

The invention discloses a method for synchronous complex breaking and heavy metal removal based on self-strengthening ozone and belongs to the technical field of wastewater treatment. The method for synchronous complex breaking and heavy metal removal based on self-strengthening ozone includes the steps that firstly, pH-adjusted heavy metal complex wastewater containing heavy metal A and a complexing agent B is added to an ozone contact pool, ozone is continuously introduced through micro-pores in the bottom of the ozone contact pool, hydraulic cycle stirring is adopted for assistance, and it is guaranteed that the reaction is uniform; secondly, after the ozone oxidation reaction is completed, a micro-pore filter membrane device is used for filtering for solid-liquid separation, and synchronous complex breaking and heavy metal removal are achieved. The method can be economical, efficient and easy and convenient to operate, engineering application is easy to achieve, complex breaking and metal ion removal are synchronously carried out, and heavy metal complex in the wastewater is removed based on self-strengthening ozone oxidation.

The invention relates to a preparation method of a magnetic mesoporous silicon dioxide adsorbent for removing aflatoxin in edible oil. The preparation method specifically comprises the following steps: (1) dissolving rice hull ash and an alkali solid to obtain a rice hull ash alkaline solution; (2) after adding ferric salt, quickly adding stronger ammonia water and heating and stirring; filtering and separating, washing, drying and grinding precipitate; (3) putting magnetic microparticles and a cationic surface active agent in a beaker, dropwise adding an adjuvant, carrying out ultrasonic dispersion, stirring, adding the rice hull ash alkaline solution to adjust the pH value, maintaining the temperature, and further stirring; and (4) after reaction, aging, carrying out centrifugal separation on the precipitate, washing the precipitate by deionized water for several times, and after drying, carbonizing and calcining the precipitate, removing the cationic surface active agent to obtain a product which is the magnetic mesoporous silicon dioxide adsorbent. The preparation method provided by the invention is simple in preparation process and mild in condition, raw materials are low in cost, and the obtained magnetic mesoporous silicon dioxide adsorbent is high in specific surface area, can be used for effectively removing aflatoxin B1 in edible oil, is easily separated from food materials, and can be repeatedly used.

The invention relates to an underwater dredging robot. The underwater dredging robot comprises a frame body, a chassis and two walking mechanisms. The frame body is connected to the upper portion of the chassis, the two walking mechanisms are arranged front and back in the length direction of the chassis, and each walking mechanism comprises two walking wheels located on the two opposite sides ofthe chassis respectively. The underwater dredging robot is characterized by further comprising a shell and a suction device; the shell is connected with the frame body and provided with a suction opening; the suction device comprises a rotary sludge loosening mechanism and a suction pipe; the rotary sludge loosening mechanism comprises a motor, a rotary shaft and multiple rotating assemblies. Theunderwater dredging robot has the advantages of being novel in design, high in dredging capacity and the like.

The invention discloses a wolframine beneficiation wastewater treatment process, and belongs to the field of industrial wastewater treatment. The method comprises the following steps of A, adding lime into wolframine beneficiation wastewater, so that the pH value is regulated to 11 to 12; B, performing solid-liquid separation after destabilization precipitation; C, discharging solid into a tailing pond, putting inlet and outlet water into a first-stage reaction tank, and adding sodium carbonate; D, putting into a second-stage reaction tank, adding coagulant aids PAM into the second-stage reaction tank to take flocculation reaction with the PAM; E, performing self flowing to put into a precipitation pool, and discharging the bottom layer concentration sewage into the tailing pond; F, putting supernatant fluid into a micro-flocculation filter, using 5-percent outlet water as reverse flushing water to be discharged into the tailing pond; G, adding concentrated sulfuric acid into 95-percent outlet water to regulate the pH value to 6 to 9; H, putting the outlet water into a micro eddy current reaction pool, and using the 5-percent outlet water as flushing water to be discharged into the tailing pond; I, eliminating carbon dioxide from 95-percent outlet water through a degassing tower, so that the water can be reused for wolframine beneficiation or can be directly discharged. The process has the advantage that the wolframine beneficiation wastewater reuse rate is improved.

The invention discloses movable intelligent oil-water separating equipment for a kitchen. The movable intelligent oil-water separating equipment comprises a filtering and precipitating device for filtering and precipitating waste water from the kitchen, an oil-water separating device for performing oil-water separation on waste water, an oil collecting device and an up-to-standard water collecting device, wherein a liquid inlet of the oil-water separating device is connected with a liquid draining outlet of the filtering and precipitating device; a liquid inlet of the oil collecting device is connected with an oil draining outlet of the oil-water separating device; a liquid inlet of the up-to-standard water collecting device is connected with a water draining outlet of the oil-water separating device. The movable intelligent oil-water separating equipment disclosed by the invention has the beneficial effects that solid-liquid separation and oil-water automatic separation of kitchen wastes are realized, and a good separating effect and high separating efficiency are realized; complement equipment is simple and attractive in appearance, convenient to use and small in occupied area, and can be integrally moved; equipment operating parameters can be uploaded through a communication network, so that the supervising cost is reduced; the movable intelligent oil-water separating equipment is provided with a heating device which can be used for heating and insulating oil and water in the equipment, so that the collection and the drainage of kitchen oil are facilitated.

The invention belongs to the field of water treatment, and provides a nano-level iron adsorbent for efficient phosphorus absorption. In the invention, a soluble starch modified ferroferric oxide is adopted, under a certain stirring intensity, the soluble starch and ferrous ions are complexed, then strong base is added, and the monodisperse nano-ferroferric oxide adsorbent with uniform particle size is generated by oxidation. The nano level of the particle size of the adsorbent is controllable, and the adsorbent has higher phosphorus adsorbing capacity and certain magnetic property, and can realize effective solid-liquid separation under an applied magnetic field.

The invention discloses preparation and application of an attapulgite / Fe3O4 / carbon composite material and belongs to the technical field of heavy metal wastewater treatment. A one-step hydrothermal method is adopted, attapulgite, a ferric salt and chitosan are used as raw materials, in a hydrothermal reactor, a part of ferric iron is reduced into ferrous iron by a reduction solvent, i.e. ethylene glycol, magnetic Fe3O4 generated under an alkali condition nucleates and grows on the surface of the attapulgite, the chitosan is carbonized into amorphous carbon to be loaded on the surface of the attapulgite, and finally the magnetic nanometer composite material is formed. The surface of the magnetic nanometer composite material is rich in active groups, such as hydroxyl, carboxyl and amino, the magnetic nanometer composite material can be used for absorbing Cr (VI) in a water body, and the highest adsorbing capacity of the magnetic nanometer composite material to hexavalent chromium in water under the conditions that pH is equal to 2 and the temperature is 298K is 250mg / g; and the composite material has certain magnetism and can be quickly separated under the condition of an external magnetic field, and the problem that the attapulgite / carbon nanometer composite material is difficultly separated is solved.

The invention belongs to the technical field of composite materials and relates to a preparation method and application of a core-shell P-CoFe2O4(at)GCN photocatalyst. The preparation method comprisesthe following steps: firstly mixing cobalt salt and ferric salt, dropwise adding alkali lye and precipitating to prepare strongly magnetic nanoparticles CoFe2O4; fully dispersing a graphite-type carbonitride precursor and a phosphorus source in distilled water, carrying out solid-liquid separation, drying a solid at 80-100 DEG C for 12-24 h, and grinding to obtain a powder; and finally placing the powder into a muffle furnace, and heating in the air atmosphere at 500-600 DEG C for 2-5 h so as to obtain the photocatalyst. In the invention, the prepared material is also applied to wastewater soas to remove antibiotics. By compound modification of the graphite-type carbonitride, the photocatalytic performance is greatly improved, and the solid-liquid separation problems are solved. The preparation method is simple to operate, and the sources of the raw materials are wide. The surface of the prepared material has a pore structure, and the specific surface area is increased, thus providing more active sites for a photo-catalytic reaction. The result shows that the tetracycline photocatalytic degradation rate of the product is 3.66 times higher than the tetracycline photocatalytic degradation rate of pure graphite-type carbonitride before modification.

The invention discloses a preparation method of a magnetic aluminum salt lithium adsorbent, which comprises the following steps of: preparing a lithium-aluminum mixed solution; preparing a magnetic core suspension; adding alkali solution and lithium-aluminum mixed solution to the magnetic core suspension to obtain a precursor solution; successively subjecting the solid products in the precursor solution to washing by organic solvent, drying, grinding, washing by deionized water and drying to finally obtain the magnetic aluminum salt lithium adsorbent. The preparation method of the magnetic aluminum salt lithium adsorbent is simple, the time consumption is short, the cost is low, the obtained magnetic aluminum salt lithium adsorbent retains the adsorption capacity of the lithium aluminum layered double hydroxide namely the aluminum salt lithium adsorbent. The invention can be applied to extract lithium resources from lithium-containing solutions with high magnesium-lithium ratio and lowlithium concentration, and has good magnetism, can be quickly separated from the solution under the action of an external magnetic field, is convenient for recovery and recycling, and avoids the problems of difficult separation and recovery of powder adsorbent in the application process, sharp decline in adsorption performance caused by molding and granulation, etc.

The invention relates to the technical field of wastewater treatment, and discloses an agricultural wastewater treatment device which comprises a tank body, a sleeve is fixedly connected to the center of the upper end of the tank body through a round opening, a sealing plate is fixedly connected to the upper end of the sleeve, a rotating shaft is rotatably connected to the center of the sealing plate through a first rolling bearing, a gear ring is fixedly connected to the shaft wall of the rotating shaft, the lower end of the rotating shaft penetrates through the first sealing bearing, extends into the sleeve and is fixedly connected with a spiral blade, a conical plate is arranged in the tank body, and the center of the conical plate is slidably sleeved with the wall of the sleeve through a circular hole. According to the agricultural wastewater treatment device, straw feed waste generated in the breeding process can be used as a filter material to effectively filter excrement residues and sludge in agricultural wastewater, the generated filter residues are convenient to clear and transport for secondary processing production, filtered sewage can be effectively stirred and flocculated, and the sewage treatment steps are effectively simplified.

The invention relates to a rubbish sorting device which comprises a storage hopper, a feeding conveyer, a bag-breaking machine and a separating device which are connected with each other in turn, wherein the separating device comprises a solid-liquid separating device and a sorting separating device; the solid-liquid separating device comprises a solid-liquid separating motor, a driving gear set, a rotary screen and a liquid collecting hopper; the rotary screen is driven by the solid-liquid separating motor through the driving gear set, and the solid-liquid separating motor is under a rotating state along the axial direction of the rotary screen; more than one spiral flow-guiding plate which extends from the head end to the tail end of the rotary screen is arranged on an inner wall of the rotary screen; the liquid collecting hopper is arranged under the rotary screen corresponding to the rotary screen; the sorting separating device comprises a heavy mass collecting hopper, a light mass collecting hopper and a sorting fan; the heavy mass collecting hopper is arranged under the tail end of the rotary screen and is under the state of collecting rubbish sent out of the tail end of the rotary screen; the light mass collecting hopper is arranged for collecting light rubbish blown by the sorting fan from the rubbish sent out of the tail end of the rotary screen corresponding to an air-feeding direction of the sorting fan.

The invention relates to a novel leaching device and a using method and application thereof. The leaching device comprises a filter with an upward opening and a vacuuming device. The filter comprises a funnel with an upward opening and filter medium, a buoy is optionally arranged, and the vacuuming device comprises a guiding tube, a liquid storing tank and a vacuum system. The leaching device leads solid and liquid to move backwards in a leaching process, solid sediment settles downwards under gravity, the liquid is removed above through pumping, solid matters can be prevented from blocking the filtering medium, accordingly time is saved and filtering efficiency is improved.

The invention discloses a preparation method of an anisotropic nano-cellulose aerogel. The preparation method comprises the following steps that S01, nano-cellulose prepared by using a TEMPO oxidationmethod is ultrasonically dispersed into water to obtain a nano-cellulose dispersion liquid; S02, the nano-cellulose dispersion liquid obtained in the S01 is directionally frozen with a freezing agentas a cold source; S03, the frozen sample obtained in the S02 is put into a drying machine to be dried. The invention further discloses the anisotropic nano-cellulose aerogel. The anisotropic nano-cellulose aerogel is prepared by using the preparation method. The invention further discloses a preparation device of the anisotropic nano-cellulose aerogel. According to the anisotropic nano-celluloseaerogel and the preparation method and device thereof, the nano-cellulose aerogel prepared by using the method has an anisotropic and orderly distributed micro-pore structure, and it is expected thatthe anisotropic nano-cellulose aerogel is applied to selective directional medium transfer of aerogel materials.

The invention discloses a domestic sewage material filtration device, belonging to the field of domestic sewage treatment. The domestic sewage material filtration device comprises a filter cylinder, abuffer tank, a precipitation tank, an adsorption tank, a deoiling tank and a biochemical filter tank which are sequentially connected; a water through opening is formed in the lower part of one sideof the filter cylinder, a sweeping scraper is arranged inside the filter cylinder, a free end of the sweeping scraper extends to the internal wall of the filter cylinder; a discharge opening connectedwith a sundry collection tank is arranged at the low part of a side, opposite to the water through opening, of the filter cylinder, and a filterer screen layer is arranged inside the sundry collection tank; a rotating shaft driven by a high-speed motor is arranged inside the adsorption tank, a spirally-surrounded spiral slideway is fixed on the rotating shaft, the external side edge of the spiralslideway is attached to the internal wall of the adsorption tank, a gap in the adsorption box is uniformly filled with activated carbon, a high temperature steam generation tank is connected to the bottom of the adsorption tank corresponding to one side of the lower end of the spiral slideway. The domestic sewage filter material device has an impurity removal function for domestic sewage, especially has a relatively high efficient function for preliminary filtration and adsorption filtration on sewage, and has relatively good treatment effects.

The invention relates to an air flotation device for conveniently collecting floating residues. The air flotation device comprises an air flotation tank, a water intake pipe, a water drain pipe, a lifting mechanism, a top plate, a filtering mechanism, an air flotation machine, a controller and a clearing mechanism, wherein the filtering mechanism comprises two filtering assemblies; each filteringassembly comprises a filtering net and two direction adjusting units; each direction adjusting unit comprises a lifting rod, a first motor, a drive wheel and a pull wire; the clearing mechanism comprises a side plate, a telescopic assembly, a clearing box and a clearing assembly; the clearing assembly comprises a spring, a press plate, a slide rod, a scraping plate and a plurality of brushes. Theair flotation device for conveniently collecting the floating residues has the advantages that the sewage can drive the impurities to float to the liquid surface by the filtering mechanism in the airflotation process; after air flotation, the floating residues are collected to the part above the filtering net, so as to separate solid and liquid; the scraping plate and the brushes are driven by the clearing mechanism to move above the filtering net, and the floating residues on the filtering net are swept off, and are collected by an operator, so as to improve the practicality of the equipment.

The invention relates to a wet flue gas desulfurization gypsum dehydrator, which comprises a host system and a vacuum system, wherein the host system comprises a frame, a slurry tank, a rotating device, a driving device, a discharging device and filter disks; two ends of the slurry tank are fixed on the frame; the rotating device has a cylindrical structure, and two ends of the rotating device are fixed at two ends of the slurry tank; the driving device drives the rotating device to rotate in the slurry tank; a plurality of filter disks are arranged on the rotating device, the filter disks have a shape of an annular disk, each filter disk encircles the outer circumferential surface of the rotating device, cavities are formed in the filter disks, and the surfaces of the filter disks are provided with micropores communicated with the cavities; the discharging device is fixed on the slurry tank and is in contact with the surfaces of the filter disks; and the vacuum system is communicated with the cavities in the filter disks. The wet flue gas desulfurization gypsum dehydrator has the advantages of reliable performance, small floor area, low energy consumption, low switch maintenance cost and good dehydrating effect.

The invention discloses a method for adsorptively removing sulfate ions in water by using a composite material with a laminated structure. An L-zinc aluminum glutamate hydrotalcite / zinc aluminum nitrate hydrotalcite composite material is prepared by using a co-precipitation method to adsorptively treat the sulfate ions in the water. An experiment shows that absorption of the sulfate ions in the water by using the material has the characteristics of short absorption time, high adsorption capacity, high applicability and recyclability. In addition, the composite material in the method has the advantages of low cost, no pollution and easy separation, and has wide development and application prospects.

The invention relates to a recovery system and a method of single nickel salt coloring and moderate temperature hole sealing agents in aluminum processing. The system comprises a nickeliferous wastewater entrapment unit, a nickeliferous wastewater collection unit and a basic nickel carbonate recovery unit, wherein a running water wash trough 18# in the nickeliferous wastewater entrapment unit is externally connected with tap water; running water wash troughs 14#, 15#, 17# and 18# are in series-opposing connection; a single nickel salt coloring trough 13# is compatible with a moderate temperature hole sealing trough 16#; the nickeliferous wastewater collection unit comprises a nickeliferous wastewater collection pool A and a nickeliferous wastewater collection pool B; a pipeline connected with the nickeliferous wastewater collection pool A and the nickeliferous wastewater collection pool B is arranged at a water outlet of the running water wash trough 14#; and the basic nickel carbonaterecovery unit comprises a pump 1#, a recovery tank, a centrifuge, a secondary crystallization tank and a pump 2#. According to the system and the method, nickeliferous wastewater can be separately collected on line; a nickeliferous product, namely basic nickel carbonate, is recovered and converted into a moderate temperature hole sealing agent on a basis of agent compatibility; and reclamation and recycling of toxic waste are achieved.