244results about How to "Fast removal" patented technology

The invention provides an integrated internal circulation type denitrification and decarburization bio-membrane reactor and an operating method thereof. The main body of the reactor consists of an anoxic zone on the lower part, an aerobic zone on the upper part and a settling zone on the periphery of the aerobic zone; a composite filler is filled in the anoxic zone, and a water inlet pipe is communicated with the bottom of the anoxic zone; the aerobic zone is partitioned into a filler zone for adding a carrier on the upper part and a mud-water mixing zone on the lower part by adopting an orifice plate, the anoxic zone and the aerobic zone are partitioned through an impermeable partition plate, and a plurality of aeration pipes are arranged at the bottom of the aerobic zone and provided with air inlet pores; and the settling zone consists of three parts, namely a clean water zone, a contact settling zone and a sludge returning zone which are sequentially arranged from top to bottom, wherein the bottom of the sludge returning zone is provided with a sludge returning seam and communicated with the bottom of the aerobic zone. The reactor realizes zero power consumption in sludge returning, and is compact in structure; and a back flushing system is not required in the contact settling zone, and additional agents and carbon sources are not required, so that the reactor is low in running cost.

Disclosed are an alumina-based ceramic core removal method and a special device thereof. The method includes placing a hollow blade with an alumina-based ceramic core into a reaction kettle fully filled with lye, and then sealing the reaction kettle; heating the reaction kettle in high-temperature, high-pressure and airtight environment; decreasing the pressure of the reaction kettle till being lower than the saturated vapor pressure of the lye, allowing the lye to be boiled to enter channels of the hollow blade for 10 to 30 seconds; recovering the pressure in the reaction kettle to stop boiling the lye and recover stable statues; removing residual lye and removed ceramic core from the hollow blade, and finally utilizing acid to neutralize residual lye on the hollow blade, and washing with water. The method has the advantages that reacted waste lye in the cavity of the hollow blade can be discharged rapidly through high temperature and increasing and decreasing the pressure repeatedly, good stirring effect is provided by periodically boiling the lye, the lye is guaranteed contacting with the alumina-based ceramic core fully, reacting efficiency is improved, and removal speed of the alumina-based ceramic core is increased significantly.

A nail trimmer for enabling a person to comfortably trim toenails without having to take on an awkward or uncomfortable posture. The nail trimmer has a long extension housing, which has a handle at its upper end and a trimmer unit at its lower end. A battery operated motor and on/off switch are incorporated into the handle end. A detachable trimmer unit is connected at the lower end. A dado cutting blade and a gear unit are enclosed in the trimmer unit. An opening in the trimmer unit housing provides access to the cutting edge of the blade.

The invention provides a polishing solution for A orientation sapphire polishing, and a preparation method thereof. The polishing solution comprises, by mass, 92-97 parts of silica sol, 0.01-1 part of an active dispersant, 0.01-1 part of a wetting agent, 0.01-2 parts of a polishing aid, 0.01-1 part of an oxidant, 0.01-2 parts of a pH adjusting agent, and the balance of deionized water. The polishing solution prepared in the invention has the advantages of good removal rate, excellent lubrication effect, good quality of the surface of a processed product in the sapphire polishing processing process, simple processing and preparation method, and facilitation of industrial popularization.

The invention relates to the field of soil remediation, in particular to a compound chemical leaching method for efficient remediation of heavy metal contaminated soil. Natural organic acid and iron salt are used as main raw materials to prepare a compound leacheate, and the technical problems that an existing soil remediation eluent is high in cost and low in efficiency and can cause secondary pollution easily are solved. According to the compound chemical leaching method, the heavy metal contaminated soil is remediated, the heavy metal content in the soil can be reduced quickly, and a good remediation effect is achieved. Waste liquid generated after leaching is disposed through a regenerant, and the primary regeneration efficiency can reach 80% or over.

The invention provides a polishing solution for ceramic bonded sapphire polishing, and a preparation method thereof. The polishing solution comprises, by mass, 94-97 parts of silica sol, 0.4-0.6 parts of a dispersant, 0.1-0.25 parts of a wetting agent, 0.2-0.4 parts of a brightener, 0-0.08 parts of an oxidant, 0.04-0.5 parts of a pH adjusting agent, and the balance of deionized water. The polishing solution for ceramic bonded sapphire polishing has the advantages of good removal rate in the processing process,, excellent lubrication effect, good quality of the surface of a processed product, simple processing and preparation method, low cost, high polishing efficiency and low roughness.

The invention discloses a formaldehyde scavenging agent and a formaldehyde scavenging method thereof. The formaldehyde scavenging agent comprises a plant component A, an essential oil component B and an adsorption component C, wherein the plant component A is prepared from, by weight, 3-8 parts of Chlorophytum comosum (Thunb.) Baker, 3-9 parts of Epipremnum aureum, 3-7 parts of Hedera nepalensis var. Sinensis (Tobl.) Rehd, 2-6 parts of aloe, 1-7 parts of Agave americana L., 2-5 parts of Sansevieria trifasciata Prain and 1-8 parts of Commelina communis; the essential oil component B is prepared from, by weight, 10-20 parts of ethanol, 5-15 parts of distilled water, 3-5 parts of peppermint oil, 1-2 parts of rose essential oil and 2-3 parts of spearmint oil; the adsorption component C is prepared from, by weight, 1-3 parts of attapulgite and 3-5 parts of bentonite by means of uniform mixing. In the formaldehyde scavenging method, a formaldehyde scavenging device is used for scavenging formaldehyde circularly. The formaldehyde scavenging agent and the formaldehyde scavenging method have the advantages of good formaldehyde scavenging effect and capabilities of improving air quality after formaldehyde scavenging and accelerating formaldehyde scavenging.

The invention relates to the technical field of artificial stones, in particular to a cement-based stone-like curb stone as well as a preparation method and molding equipment thereof. The cement-basedstone-like curb stone comprises the following components of, in percentage by weight, 14-16% of cement, 26-28% of yellow sand, 45-55% of gypsum and 6-8% of water. The preparation method comprises thefollowing steps of a) fully mixing, in percentage by weight, 14-16% of cement, 26-28% of yellow sand, 45-55% of gypsum and 6-8% of water to obtain a concrete mixed wet material; (b) placing the concrete mixed wet material into the molding equipment, closing a mold, wherein the closing pressure is 100-160 MPa, and performing negative pressure vacuum pumping on a cavity, wherein the vacuum degree value of the vacuum pumping is 0.8-1.0 MPa, the closing and pressure maintaining time and the vacuum pumping time are less than or equal to 5 minutes, and the concrete mixed wet material quickly loses90% of moisture and is initially solidified and formed into a curb stone semi-finished product; and (c) carrying out mold opening and demolding by the molding equipment, transferring the semi-finishedcurb stone product out of the mold for stacking to obtain a finished cement-based stone-like curb stone product. The molding equipment is adopted, the manufacturing efficiency is high, the strength of the curb stone is high, the production efficiency is high, and the production cost is reduced.

A guardrail system (20) and method comprises utilizing at least one through-hole (577) of a poured concrete wall (520) of a structure (500) to affix a stanchion (22, 122, 222) to the wall inside a bay (530) of the structure. The stanchion allows for a guardrail (30) or a gate to be conveniently and securely positioned within the bay (530) without damage to the structure and without covering an edge (515, 525) of the structure (500). A fastener (24) inserts through the through-hole (577) which is a pre-existing tie-hole (576) resulting from formation of the wall (520). In one optional aspect a guardrail stanchion (222) includes a base segment (50) having at least two slots (26) for receiving fasteners (24) which insert through two tie-holes (576) of the wall (520), and at least one side segment (52) having at least one adjustment port (56), the side segment (52) extending generally perpendicular to the base segment (50). A pair of stanchions (22, 122, 222) may be affixed to opposing walls within the bay, and guardrails (30) affixed thereto and spanning across the bay (530). The system (20) may also include a cable system (80) having a cable (579) operate as a guardrail (30) to be tightened by utilizing a stanchion (22, 122, 222) in accordance with the invention. Additional aspects are also presented for utilizing timber stanchions (22, 122, 222) and nylon straps (30), among other aspects.

The invention relates to a thinning and electrolytic machining device for the inner wall of a static cutter cover of a shaver and a machining process method of the device and belongs to the technical field of machining of the static cutter cover of the shaver. The thinning and electrolytic machining device is based on an electrolytic machining principle and adopts a tool cathode to carry out thinning and machining forming on the inner wall of a blank of the static cutter cover; and in the process of carrying out electrolytic machining on the blank of the static cutter cover, the blank of the static cutter cover rotates around the axis of the blank of the static cutter cover when linearly fed relative to the tool cathode, and electrolyte required for the electrolytic machining flows through a machining gap formed by the blank of the static cutter cover and the tool cathode continuously at a high speed (10 m/s to 20 m/s). The thinning and electrolytic machining device not only has a high machining efficiency, a stable machining process and a high accuracy, but also realizes high-quality and high-efficiency machining on the inner wall of the static cutter cover.

The invention relates to a tenofovir disoproxil salt preparation method; first tenofovir or tenofovir monohydrate is used as a starting material for condensation reaction with chloromethyl isopropyl carbonate in a strong polar organic solvent in the presence of a phase transfer catalyst to prepare tenofovir disoproxil, then the tenofovir disoproxil is salified with succinic acid and fumaric acid to prepare a tenofovir disoproxil salt; in the stage of esterification reaction for removing the organic solvent, a thin film evaporator is used for distillation for removing rapidly the solvent at low temperature, the material flows through the evaporator in a very short time about 10 seconds, the problems of reactant decomposition caused by too high distillation temperature and long heating time in the prior art can be avoided, and the product purity and yield are greatly improved. The final finished product HPLC (high performance liquid chromatography) is more than or equal to 99.85%, the single impurity content is less than 0.1%, and the yield is 62%-67%.

The invention discloses a preparation method of 2-ethoxyl pyridina, which comprises the steps of: (1) using tetrahydrofuran as a solvent, enabling 2-methyl pyridine and organic alkali to completely react in the solvent at -60-60 DEG C to prepare a reaction liquid; (2) adding paraformaldehyde into the reaction liquid, agitating and reacting for 0.5-5 hours at 10-60 DEG C, then dropping water into the mixture under the reaction condition, and agitating continuously and reacting for 0.5-1 hours at 10-60 DEG C after dropping water to prepare a product liquid; and (3) removing water in the product liquid, then removing tetrahydrofuran in the product liquid to obtain the 2-ethoxyl pyridine. The method provided by the invention is simple in process operation, short in synthesizing time of product, low in production cost, high in production efficiency, less in secondary reaction, high in product yield and high in purity.

The invention discloses immobilized nitrifying bacteria for removing ammonia nitrogen in an aquarium and a preparation method of the immobilized nitrifying bacteria. The immobilized nitrifying bacteria comprises polymeric hydrogel with a grid structure and activated nitrifying bacteria fixed in the grids. The polymeric hydrogel is formed through free radical polymerization of water-soluble acrylate monomers. The invention further discloses a using method of the immobilized nitrifying bacteria in the aquarium, and further provides a using position of immobilized nitrifying bacteria in the aquarium. According to the immobilized nitrifying bacteria for removing ammonia nitrogen in the aquarium, provided by the embodiment of the invention, the ammonia nitrogen removal rate reaches 95%. Ammonia nitrogen in the aquarium can be treated by using nitrifying bacteria particles, high simpleness and convenience and high easiness in implementation are achieved, and the ammonia nitrogen removal rate is high.

The invention provides a solid amine adsorbent, a preparation method thereof, and a CO2 adsorption assembly containing the same. The solid amine adsorbent comprises hollow fibers and an organic aminesupported on the inner surface of the hollow fibers. The hollow fibers have a conveniently-adjusted pore structure, and can accommodate introduction groups with different structures and different molecular sizes to make the selection range of the organic amine wide; and a regular finger-like structure in the finger-like porous layer of the hollow fibers makes the organic amine uniformly distributed in pores to form an organic amine film, so the surface area of a CO2 adsorption reaction is greatly improved, and the removal rate of CO2 is significantly improved.

The invention relates to a water-in-oil microemulsion printing ink cleaning agent and a preparation method thereof. The cleaning agent is prepared from a C8-C10 petroleum fraction mixture, a composite nonionic surfactant, an ampholytic surfactant, a cosurfactant, organic acid, a corrosion inhibitor and water. The preparation method comprises the steps that the composite nonionic surfactant, the ampholytic surfactant and the cosurfactant are added into the C8-C10 petroleum fraction mixture in sequence, all the materials are stirred for 20-40 min, then a mixture of organic acid and the corrosion inhibitor is added, water is added, stirring is conducted for 20-40 min till the mixture is clear and colorless, and the cleaning agent is obtained. The cleaning agent is high in printing ink stain removing speed, good in effect, high in corrosion inhibition, high in drying speed and good in stability; the cleaning agent has the advantages of being high in flashing point and noncombustible and not polluting the environment, the safety performance is good, the cost is low, and the cleaning agent can be widely used for cleaning of printing machines, ink rollers and rubber blankets; the method is easy to implement and low in energy consumption, and microemulsion can be formed by means of self-emulsification at room temperature.

The invention, which belongs to the technical field of nuclear fuel reprocessing, discloses an apparatus for removing nitrous acid in reprocessing feed solution in the nuclear fuel reprocessing Purex process. The apparatus comprises a removal tower, an air generator and a feed solution receiving tank, wherein a feed solution inlet is arranged on the top end of the removal tower, an air inlet is arranged on the lower end of the removal tower, a feed solution outlet is arranged on the bottom of the removal tower, and a heater is arranged on the external wall of the removal tower; the feed solution receiving tank is connected with the feed solution outlet of the bottom of the removal tower through a feed solution output pipe; packing is arranged in the removal tower, and feed solution to be treated enters the removal tower via the feed solution inlet of the removal tower to be in countercurrent contact with the air entering the air inlet. The apparatus has the advantages of good nitrous acid removal effect, high speed, continuous operation and high treatment capability.

The disclosure relates to chemical mechanical planarization (CMP) polishing compositions including proline and a fluorochemical surfactant. The wafer polishing composition may be used as a solution substantially free of abrasive particles, the composition of which can be adjusted to control Oxide Removal Rate and oxide over nitride Selectivity Ratio in Shallow Trench Isolation (STI) processing ofsemiconductor wafers using a fixed abrasive CMP process. In certain embodiments, the disclosure provides a working liquid for fixed abrasive CMP including proline and a fluorochemical surfactant at apH from 9 to 11. When used in a fixed abrasive CMP system and method for STI, exemplary working liquids may yield an Oxide Removal Rate of at least 500 angstroms per minute, and an oxide over nitrideSelectivity Ratio of at least 5.

The invention discloses a microbial dredging device, comprising a casing body. The top of the casing body is fixedly connected with a shell, and the top of the casing body is fixedly connected with adriving motor inside the shell. The microorganism is placed in the inner part of the box through the coordination of a driving motor, a driving shaft, a first gear, a rolling bearing, a rotating shaft, a second gear, a controller, a thread sleeve, a thread groove, a threaded rod, a box, a telescopic rod, a drill bit, a cylinder, a through groove and a baffle plate. The controller drives the driving shaft forward or backward by controlling the driving motor, the driving shaft drives the second gear to rotate through the first gear, and the second gear drives the thread sleeve to rotate throughthe rotating shaft. Due to the screw principle, the threaded rod drives the box to move upward or downward, and the microorganism can be applied to the mud at different depth positions. The speed of sludge removal is accelerated, and the sludge removal effect is ideal, which brings great convenience to the dredging work.

The invention discloses a plasma generator, which is characterized by comprising a base, a control module, a display module, a formaldehyde detection module, an upper cover, an outer electrode, a glass tube, and an inner electrode. The glass tube is a cylindrical glass pipe with two opened ends and is vertically arranged on the base. The outer electrode is arranged in the inner side of the glass tube, the inner electrode is arranged in the inner side of the glass tube, the outer electrode does not contact the inner electrode directly, and the upper cover is arranged on the upper opening of the glass tube. The ends close to the base of the outer electrode and the inner electrode are respectively connected to two different conductive parts, which do not contact with each other. The control module and the formaldehyde detection module are parallelly arranged on the base, and the display module is arranged on the control module. The generator can measure the environmental temperature and humidity, can also measure the formaldehyde content, is capable of automatically adjusting the number of ions generated by the plasma generator according to the environmental formaldehyde content, and is very practical.