6results about How to "Stable removal rate" patented technology

The invention discloses a sponge-based defluorination composite material as well as a preparation method and application thereof. The sponge-based defluorination composite material comprises sponge serving as a carrier and metal salt loaded on the sponge, the metal salt comprises iron metal salt, aluminum metal salt and lanthanum metal salt; the iron metal salt is ferric sulfate or ferric chloride, the aluminum metal salt is aluminum chloride, and the lanthanum metal salt is lanthanum chloride or lanthanum nitrate. Compared with other adsorption type defluorination materials, the sponge-based defluorination composite material disclosed by the invention is low in cost, convenient to use and capable of being repeatedly used for many times; meanwhile, the sponge-based defluorination composite material is high in defluorination efficiency and stable in performance, and has remarkable application advantages.

The application discloses a method for deep denitrification and phosphorus removal based on polylactic acid and pyrrhotite cooperation, which comprises the following steps: S1, activated sludge preparation; S2, activated sludge inoculation; S3, reaction component activation; S4, wastewater subsection treatment. In the method, polylactic acid is used as a heterotrophic denitrification solid carbon source, and pyrrhotite is used as an autotrophic denitrification electron donor for denitrification and phosphorus removal, a reaction component is built, and the activation method of the reaction component and the step parameters are defined in detail, so that the best treatment condition is obtained, and the polylactic acid-pyrrhotite composite filler is used for cooperation and denitrification, thereby realizing efficient wastewater denitrification and phosphorus removal.

This invention discloses a small-diameter motor-driven dual-mode intelligent honing tool integrated into a machining center, along with its operation method and application, belonging to the field of precision machining. The honing tool includes a tool body, a honing stone assembly, a motor-driven feed mechanism, a conductive slip ring, a protective cover, and a motor control system. The motor-driven feed mechanism is integrated within the tool body, driving the axial movement of the pusher rod through a reduction gearbox and a lead screw pair, and using the conical surface to drive the radial expansion and contraction of the honing stone. The motor control system employs dual-mode intelligent control: quantitative rough honing based on encoder position feedback, and constant-pressure fine honing based on a motor current-honing force model, thus achieving precise closed-loop control of the honing process. The conductive slip ring ensures power supply for rotation, and the protective cover provides anti-rotation and sealing. This honing tool can complete drilling, reaming, and honing composite machining in a single setup, solving the problems of low pressure control accuracy and slow response of traditional hydraulic tools, and is particularly suitable for ultra-high precision parts such as electro-hydraulic servo valve sleeves.

The invention discloses a porous iron-based material and application of the porous iron-based material coupled with microorganisms in wastewater treatment, and belongs to the technical field of wastewater treatment. The porous iron-based material is obtained by mixing composite carbon nitride with a carbon source and an iron source and then performing high-temperature reduction, the composite carbon nitride is prepared by taking melamine, ammonium phosphate and thiourea as precursors through a thermal polymerization method; the carbon source comprises tannic acid, glucose and chitosan; the iron source comprises ferric chloride hexahydrate; the prepared porous iron-based material is good in stability, and when the porous iron-based material is placed in a bioreactor inoculated with activated sludge, efficient degradation of antibiotics in wastewater can be effectively achieved.

This invention relates to the field of chemical mechanical polishing (CMP) pad technology, specifically to a highly hydrophilic and wear-resistant CMP polishing pad, its preparation method, and its application. The invention uses cyanosiloxane monomers as raw materials, preparing highly active carboxylate silsesquioxane powder through one-step alkaline hydrolysis, and achieving nanoscale uniform dispersion of this powder in polyurethane. After pre-treating the base fabric with an acid-base oscillating impregnation agent, the nanoscale uniformly dispersed slurry is coated onto the base fabric, and then solidified to obtain the target product. This invention solves the technical problems of difficulty in balancing hydrophilicity and wear resistance, and poor polishing uniformity in existing hydrophilic modification polishing pads. The polishing pad produced is used for wafer polishing, exhibiting less than 3% intra-wafer non-uniformity, fewer surface defects, and extended service life. The process of this invention is fully compatible with existing wet production lines for polyurethane polishing pads, requiring no additional equipment. The process is simplified, batch stability is strong, and industrial mass production is possible, adapting to the high-precision, low-defect polishing requirements of advanced semiconductor processes below 14nm.

The utility model relates to phenolic resin production technical field discloses a kind of waste gas safety treatment equipment for phenolic resin production, including liquid accumulation groove and the exhaust pipe of communication setting in the bottom of liquid accumulation groove, exhaust pipe is arranged on the top of liquid accumulation groove, further include air inlet part and purification part, air inlet part and purification part are set on liquid accumulation groove, and exhaust pipe is arranged on the top of purification part;Air inlet part includes connecting assembly and several adjusting assemblies, and several adjusting assemblies are all set on connecting assembly;Connecting assembly includes the air inlet pipe of communication setting in the outer wall of liquid accumulation groove, and fixedly connected with fixed plate on air inlet pipe, and the left side of fixed plate is provided with rotating plate;Wherein, rotating plate is rotatably connected with the outer wall of air inlet pipe;The utility model can match the air intake according to waste gas production, avoid air intake too large to cause gas-liquid contact time insufficient, impurity removal not thorough, or air intake too small to cause equipment idle consumption, guarantee the high efficiency of gas-liquid reverse contact, ensure that larger impurity removal rate is stable.