38results about How to "Remove applicable" patented technology

The invention relates to a phosphorus removing agent containing inorganic mineral and an application method thereof. The phosphorus removing agent contains 50-75% of an aluminium-containing compound, 15-30% of an inorganic mineral adsorbent and 10-20% of an iron-containing compound, and also can be compounded with a B component. By the use of the phosphorus removing agent, inorganic phosphorus and organic phosphorus in wastewater are removed effectively. By the addition of the inorganic mineral adsorbent, phosphates are fully adsorbed, and the inorganic mineral adsorbent can be combined with iron hydroxide and dried aluminium hydroxide gel generated during the reaction. Thus, more phosphates and pollutants in water can be adsorbed to form larger floc, and settling and flocculation processes are accelerated. Through the synergistic effect of substances, a better phosphorus removing effect is achieved. The phosphorus removing agent has a very good effect of processing orthophosphate, polyphosphates and organic phosphorus and especially has a function of efficiently removing organic phosphorus. In addition, the application method of the phosphorus removing agent is simple.

The invention specifically relates to a method for removing complexed heavy metal ions in a water body, belonging to the technical field of wastewater treatment. The method provided by the invention comprises the following steps: reacting a water body containing complexed heavy metal ions with a heavy metal replacement reagent, and then adding a heavy metal capturing agent. The method for removing complexed heavy metal ions in the water body is simple and easy to operate, low in cost and capable of efficiently removing heavy metal ions in a wide concentration range, and the concentration content of heavy metal ions in treated water is less than 0.1 ppm.

The invention provides an iron-based catalyst for strengthening ozone oxidation of organic pollutants. The catalyst can efficiently catalyze the organic pollutants which are difficult to degrade by the ozone oxidation under the condition of low ozone concentration to remove difficultly degraded organic substances, and is prepared by taking natural zeolite, artificial zeolite or a zeolite-like material as a carrier loaded with active components, wherein the active components comprise ferrihydrite and delta-hydroxyl oxidize iron in a mass ratio of (20 to 80): (20 to 80); the invention further provides a preparation method of the catalyst and a method for treating wastewater by using the catalyst which can effectively remove antibiotics such as metronidazole difficult to degrade in hospital wastewater; furthermore, the invention improves a disinfection device of existing hospital wastewater, namely a filling layer of the iron-based catalyst is added in an ozone contact pool, thereby not only disinfecting wastewater, but also decomposing the antibiotics in wastewater without changing original operating parameters.

The invention relates to a nano zero valent iron @ molecular sieve composite material and a preparation method and applications thereof. The preparation method comprises following steps: preparing aniron salt solution; adding molecular sieves into the iron salt solution; mechanically stirring the iron salt solution under the protection of nitrogen so as to introduce iron ions into the molecular sieves to obtain a mixed solution (A) containing molecular sieves and iron salts; subjecting the mixed solution (A) to solid-liquid separation; after separation, mixing the solids with water to obtaina mixed reaction solution; under the protection of nitrogen and mechanical stirring, adding a solution of a reducing agent into the mixed reaction solution, keeping on stirring to obtain a mixed solution (B); subjecting the mixed solution (B) to solid-liquid separation; and finally washing and drying the obtained solids after separation to obtain the nano zero valent iron @ molecular sieve composite material. The synthesized nano zero valent iron @ molecular sieve composite material has a cation exchange function of molecular sieves and an adsorption-reduction function of nano zero valent ironand has a good effect on removing cations of heavy metals such as Pb<2+>, Cu<2+>, etc. and anions such as ions of arsenous acid.

The invention discloses a method for rapidly removing a thermal spraying coating. A sand blasting material adopts alloy sand with diameters being 0.5-5.0 mm, special-shaped alloy sand with the ratio of length to width being 1.0-5.0 as well as 10-50-mesh ceramic sand, wherein the mass ratio of the alloy sand to the special-shaped alloy sand to the ceramic sand is (1-4):(1-4):1; before sand blasting, three raw materials are uniformly poured into an iron barrel simultaneously, mixing of the raw materials is facilitated, the mixed sand in the iron barrel is poured into a sand tank for sand blasting, and the air source pressure for sand blasting is 0.5-0.9 MPa. The sand composition is optimized and improved, the air source pressure is increased, the removal time of an old coating is greatly shortened, and compared with the time for old coating removal through single ceramic sand blasting, the time is shortened by 60%-75%; meanwhile, the production cost is reduced, the old coating is economically and efficiently removed, and the method is suitable for removing various metal coatings, alloy coatings and metal ceramic coatings.

The invention provides a method for synergistically degrading refractory organic matters in village and town sewage by using a hydrogen peroxide component in low-concentration peracetic acid. The method comprises the following steps of: adding nano zero-valent iron serving as a catalyst and a low-concentration peracetic acid solution which serves as an oxidant and contains hydrogen peroxide into water containing antibiotics; irradiating the mixed solution by using ultraviolet light emitted by a low-pressure mercury lamp 1; using the nano zero-valent iron and the ultraviolet light to jointly activate strong oxidizing free radicals generated by the oxidant, and using the direct photolysis effect of the ultraviolet light to synergistically degrade the refractory organic matters in the village and town sewage. According to the method, the hydrogen peroxide in low-concentration peracetic acid is used for cooperating with peracetic acid, the nZVI catalyst is added, meanwhile, ultraviolet irradiation is carried out to construct an nZVI/UV/PAA heterogeneous strengthening system, and nZVI and UV are used for activating to generate strong oxidizing free radicals to oxidize and remove antibiotics; the method has the advantages of high treatment efficiency, simplicity and convenience in operation, good reusability of the catalyst, low cost and the like.

The invention relates to a method for preparing a photocatalyst for treating petroleum pollutants in water. The method is characterized in that titanium dioxide and Cu and Mn oxides are taken as active ingredients and are loaded on a floating type foaming ceramic carrier through adopting a rolling load technology. The method comprises the following specific steps: (a) dissolving titanyl sulfate into deionized water, regulating the pH value to 7-10 by using a 5-25% ammonia solution, cleaning the obtained white precipitate centrifugally, mixing the white precipitate with the deionized water, pulping and regulating the pH value to 7-10 under a mixing condition by using H2O2 and HCl so as to obtain titanium sol; (b) dissolving manganese salt and copper salt into the deionized water, mixing with a permanganate solution, dripping a NaOH solution to regulate the pH value to 8-12 and spray-drying the obtained size to obtain catalyst precursor powder; and (c) adding foaming ceramic balls into a rotary granulator, spreading the catalyst precursor slowing under the rolling condition, spraying titanium sol to be used as an adhesion agent, carrying out roll coating, drying and calcinating to obtain a catalyst finished product.

The invention relates to a method for removing a brominated flame retardant in a water body. An oxychlorination agent is added into wastewater containing the brominated flame retardant, irradiating isconducted through an ultraviolet light emitting diode, and chlorine radicals, hydroxyl radicals and the like are generated through short wave ultraviolet light in an activated mode to conduct oxidation removing on the brominated flame retardant. Compared with the prior art, the oxychlorination agent is adopted, the chlorine radicals are generated through the short wave ultraviolet light in the activated mode to conduct oxidation removing on organic matter, and a quick, efficient and environment-friendly novel technology for treating the brominated flame retardant in the wastewater is provided; and the method provided by the invention is environmentally friendly, secondary pollution is not generated, the good degrading effect can be achieved under the normal-temperature condition, operation is easy, and the method is suitable for removing organic pollutants such as the brominated flame retardant in the water body.

The invention provides a waste wood removing system, and relates to the field of cutting. The waste wood removing system comprises suction cups, a suction cup installing plate, a lifting air cylinderand flow collecting blocks; the suction cup installing plate is provided with adjusting grooves, and the adjusting grooves penetrate through the two opposite long and wide faces of the suction cup installing; the suction cups are slidably installed in the adjusting grooves; the suction cups are provided with air guiding holes penetrating through the suction cups in the length direction of the suction cups, and the flow collecting blocks are connected with the corresponding ends of the air guiding holes of the suction cups through guiding pipes; and an output shaft of the lifting air cylinder is fixed to the suction cup installing plate. According to the waste wood removing system, the problems that an existing waste wood removing system can not be suitable for removing waste wood in special shapes and is narrow in application range.

The invention discloses a polybenzoxazine-based derived carbon material for adsorbing carbonyl sulfide and a preparation method and application thereof. The preparation method of the polybenzoxazine-based derived carbon material comprises the steps that an amine compound serves as a curing agent, a polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer P127 serves as a soft template agent, in the presence of the curing agent and the soft template agent, a phenol compound and an aldehyde compound are subjected to a one-step polymerization reaction, an obtained polymer is subjected to high-temperature carbonization pyrolysis, and the preparation is completed. The polybenzoxazine-based derived carbon material has the advantages of large specific surface area, developed micropores, high mechanical strength and the like, and has a relatively good adsorption effect on carbonyl sulfide in coke oven gas. The method has the advantages of simple preparation method, low raw material cost, no by-product and the like, and has potential industrial application value.

The invention relates to the technical field of medical instruments, in particular to a method for removing endotoxin in bacterial cellulose. The method comprises the following steps: (1) soaking sliced bacterial cellulose in a sodium hydroxide solution, and replacing the sodium hydroxide solution for soaking for multiple times; (2) soaking bacterial cellulose in an ethanol solution, and dissolving endotoxin in the porous structure; (3) adding a sodium hydroxide solution and a polysulfone resin polymer with positive charges into the bacterial cellulose treated in the step (2); and (4) soaking the treated bacterial cellulose in water for injection until the pH value is 7 +/-1. According to the method, the endotoxin in the bacterial cellulose is removed, the purification process of the bacterial cellulose is accelerated, the mechanical property and physical and chemical aspects of the bacterial cellulose are not affected, and the endotoxin content of the obtained bacterial cellulose is far smaller than the specified content.

Belonging to the technical field of vegetable oil processing, the invention relates to a method for removal of vegetable oil precipitate after pressing. The method includes: subjecting pressed vegetable oil to coarse filtration, then adding a nonionic surfactant for microwave radiation treatment, conducting cooling and filtering, and removing precipitate. The vegetable oil obtained by the method provided by the invention has good quality, and is free of precipitate or turbid phenomenon after placement at 0-6DEG C for 1-3 months.

The invention provides an auxiliary robot for cable construction, and belongs to the technical field of cable construction. The technical scheme is as follows: the robot comprises a rack, the rack comprises a top plate and vertical plates arranged at the two ends of the top plate, a first screw rod is rotationally arranged between the two vertical plates, a rectangular opening is formed in the position, corresponding to the first screw, of the top plate, a first moving plate is arranged on the first screw rod in a threaded connection manner, the first moving plate penetrates through a limitingrod arranged between the two vertical plates; the limiting rod is located above the first screw rod, a cutting mechanism is arranged on the first moving plate, a steel armor jacking mechanism is arranged on the outer side of any vertical plate, a cable clamp is arranged on the outer side of the other vertical plate, and the end, close to the cable clamp, of the first screw rod extends out of thevertical plate to be connected with a first motor with a speed reducer. The auxiliary robot has the advantages that the robot can assist workers in removing the outer sheath of a cable, so that the workload of construction personnel is reduced, and the construction progress is improved.

The invention provides a device for removing synthetic musk in sewage. The device comprises an aerobic treatment device and a sedimentation device, wherein the aerobic treatment device comprises a plurality of small microbial spheres arranged in the aerobic treatment device, a plurality of baffles vertically arranged in the aerobic treatment device, an aeration device located at the bottom of the aerobic treatment device as well as a carrier separator and an effluent weir which are located at a water outlet of the aerobic treatment device. Under the action of aeration and blockage with the baffles, the sewage sequentially passes through bottom ends and top ends of the adjacent baffles to form baffling flow which reciprocates up and down, and contact time with the plurality of small microbial spheres is prolonged; the small microbial spheres are spheres containing bacillus subtilis and a curing embedding agent, the curing embedding agent is used for adsorbing the synthetic musk in the sewage, and the bacillus subtilis is used for degrading the adsorbed synthetic musk; the degraded sewage is subjected to sedimentation treatment in the sedimentation device, and a supernatant is treated effluent.