17results about How to "Achieve deep removal" patented technology

The invention belongs to the technical field of synthesis of extraction agents, and particularly relates to a preparation method and application of amido diphosphinic acid. The preparation method comprises the following steps: (1) mixing a solvent, primary amine, cyclohexylphosphinic acid and inorganic acid, and heating until the solution is clear and transparent; (2) adding a formaldehyde solution or paraformaldehyde into the clear and transparent solution for reaction; and (3) removing a water phase from the mixture obtained after the reaction in the step (2) is finished, dissolving jelly obtained after the water phase is removed by using dichloromethane, and carrying out washing, rotary evaporation and drying to obtain the amido diphosphinic acid.

The application discloses a regenerated cationic cellulose-based composite filter membrane and a preparation method and nanometer plastic removal application thereof, and belongs to the technical field of regenerated cellulose water treatment filter materials. In the application, a sodium hydroxide-urea-thiourea ternary system is used to fully dissolve cellulose, the cellulose is modified by 2,3-epoxypropyl trimethylammonium chloride cation, a PVDF membrane is used as a base, and a hydrophilic composite filter membrane is prepared by vacuum filtration and loading of a cationized cellulose layer. The preparation process is mild, and the defects of the traditional cellulose membrane, such as insufficient dissolution, uneven pore size and poor screening precision, are solved. The filter membrane surface is positively charged, the hydrophilicity is greatly improved, the water contact angle is only 39°, the particle size of 50-500 nm carboxylated nanometer plastics can be efficiently intercepted, the removal efficiency of 100 nm polystyrene nanometer plastics reaches 97.01%, and the water flux is excellent. The process is green and low-cost, can remove polystyrene, polymethyl methacrylate and polyvinyl chloride nanometer plastics in a wide range, and has a good engineering application prospect in the field of deep treatment of water body nanometer plastic pollution.

The invention discloses a process method for selective deep desulfurization and denitrification of aromatic-rich fractions. The process method comprises the following steps: (1) mixing aromatic-rich diesel oil with hydrogen, and then feeding the mixture into a pre-hydrogenation reaction zone I for pre-hydrogenation dealkene reaction; (2) a product obtained in the step (1) enters a hydrofining reaction zone II for a hydrofining desulfurization and denitrification reaction; (3) carrying out flash evaporation on the product obtained in the step (2) to separate recycle hydrogen, enabling the obtained refined diesel oil to enter a moving bed adsorption denitrification reaction zone III, and carrying out deep adsorption denitrification reaction on the refined diesel oil under the action of an adsorption denitrification agent to obtain a desulfurized and denitrified refined aromatic-rich diesel oil component; and (4) enabling the inactivated adsorption denitrification agent in the step (3) to enter an adsorbent regeneration area IV, and completing reduction and drying of the inactivated adsorption denitrification agent under the action of a desorption agent to obtain the cyclically regenerated adsorption denitrification agent. According to the process method, deep removal of the sulfur-containing nitrogen-containing compound can be realized, and the investment cost is also greatly reduced.

This utility model belongs to the field of gypsum slurry technology, and particularly relates to a three-stage sedimentation and filtration device for gypsum slurry. It includes a support plate, a support frame above the support plate, a primary filter box above the support frame, an inlet above the primary filter box, a secondary filter tank connected to one side of the primary filter box via a first discharge pipe, a support base below the secondary filter tank, a tertiary filter box connected to one side of the secondary filter tank via a second discharge pipe, and a discharge pipe on one side of the tertiary filter box. The primary filter box contains a vibrating plate assembly for preliminary filtration of the slurry, and a spiral feeding assembly below the vibrating plate assembly. This utility model fundamentally solves the shortcomings of traditional processes in handling complex slurries, achieving deep removal of pollutants and efficient resource recovery while ensuring continuous operation, thus possessing significant economic and environmental benefits.

The present application relates to waste gas treatment technical field, specifically to a kind of acrylic resin waste gas treatment filter equipment, including main body, the main body inside is equipped with purification cavity, the main body circumferential outer wall is fixedly connected with shunt pipe, the shunt pipe bottom is equipped with several air pipes, the air pipe bottom end is penetrated to the inside of purification cavity;The inside of the purification cavity is provided with purification device, the purification device includes rotation installation in the center position of the inside bottom of purification cavity drive shaft, the inside of the purification cavity is located at the top position of drive shaft and is provided with limit frame, the center position of the limit frame bottom is penetrated and is equipped with docking interface.This application is through gas distribution plate, push plate and filter assembly linkage, to establish gas-liquid mixing neutralization system, improve the neutralization of acidic substances and the absorption efficiency of soluble VOCs, reduce the subsequent pollutant load, push plate, filter assembly and other collaborative impurities, clean filter screen, prevent secondary pollution, prolong the service life of filter material.

The invention relates to a method for one-step synthesis of high-quality stannous oxide through intermittent ultrasonic reinforcement, and belongs to the technical field of semiconductor material preparation. The preparation method comprises the following steps: dropwise adding a sodium hydroxide aqueous solution into a stannous chloride aqueous solution at room temperature under a stirring condition until the pH value is 12.5-13.5 to form a mixed solution system; applying intermittent ultrasonic waves to the mixed solution system for intermittent ultrasonic treatment to induce direct nucleation and growth of stannous oxide and synchronous removal of chlorine impurities, carrying out solid-liquid separation, and drying the solid to obtain the low-chlorine fine-particle-size stannous oxide. According to the method, through the work-stop periodic effect of intermittent ultrasound, dynamic conditions are provided for diffusion and desorption of chloride ions while nucleation and growth regulation are promoted through cavitation, cooperative regulation of particle size refinement and deep dechlorination of stannous oxide is achieved, a high-temperature step or repeated washing is not needed, the process is simple and efficient, the conditions are mild, and the method is suitable for industrial production. And controllable preparation of the high-performance stannous oxide material can be realized.

The application discloses a method for preparing arsenic-cadmium alloy by using arsenic-cadmium acid waste liquid, and belongs to the technical field of wastewater treatment. The application realizes the selective precipitation of arsenic and cadmium in the form of Cd5H2(AsO4)4.4H2O with high purity and complete crystal form by precisely controlling the molar ratio of cadmium to arsenic in the waste liquid to be 1.2-1.6 and adjusting the pH of the precipitation to be 4-6, thereby realizing the deep removal of the two toxic elements of arsenic and cadmium, and the removal rate of arsenic can reach more than 96.70%, and the process flow is greatly reduced. The Cd5H2(AsO4)4.4H2O-based precipitation slag is converted into high-purity arsenic-cadmium alloy by carbon thermal reduction, the amount of slag is greatly compressed, and the storage and landfill of waste materials are significantly reduced. The alloy can be further used to prepare downstream products such as semiconductor materials as a high-value-added product, realizes the high-value conversion from harmful waste to high-end raw materials, and has remarkable green disposal and resource utilization benefits.

The utility model relates to a kind of electric field activation pyrite removal wastewater total nitrogen device, belong to sewage treatment technical field, the utility model includes water distribution tank, reaction tank and effluent tank;Anode cage, cathode tube are equipped in the reaction tank, and sulphur iron ore particles are filled between cathode tube and anode cage;The power supply is connected to the cathode tube and anode cage;Water distribution tank and reaction tank between being equipped with baffle A, and the bottom of baffle A remains water flow passage A;Reaction tank and effluent tank between being equipped with baffle B;Water flow passage B is left in the left side of baffle B;The structure of the utility model makes sewage contact with sulphur iron ore under the action of electric field, and nitrate nitrogen and nitrite nitrogen can be reduced to nitrogen without biological bacteria, and nitrogen removal rate is high.

The invention discloses a preparation process of air entrapment prevention low-bubble moisture curing reaction type polyurethane honeycomb glue, and relates to the technical field of chemical synthesis processes. The process comprises the following steps: firstly, introducing sacrificial isocyanate, and converting deep bound water in polyhydric alcohol into gas and deeply removing the gas in cooperation with pulse type nitrogen gas stripping and reverse vacuum linkage; and then carrying out high-temperature solubilization hysteresis treatment to forcibly dissolve by-product particles so as to eliminate bubble nucleation centers. In the polymerization stage, a reaction type low-surface-energy modifier is adopted for in-situ end capping, and the surface tension of the melt is reduced; a negative pressure gradient cooling procedure is executed in the discharging stage, the vacuum degree is gradually increased along with cooling, and the gas under-saturation state of the glue solution is locked. According to the invention, the hidden danger of endogenous bubbles is effectively eliminated, the finished product glue solution is endowed with the capabilities of inhibiting mechanical gas entrapment and actively absorbing interface bubbles during roll coating, and the flatness and bonding quality of the composite honeycomb plate are remarkably improved.

The application provides a high-capacity and high-rate hard carbon negative electrode material and a preparation method and application thereof, and belongs to the technical field of sodium ion battery negative electrode materials. Specifically, biomass shell raw materials are coarsely broken and sieved to obtain biomass coarse powder; the biomass coarse powder is mixed with an oxidizing agent and then pre-oxidized; mechanical pulverization is performed to obtain biomass coarse powder with a D50 of 8-15 microns; the biomass coarse powder is added into mixed acid and heated in a water bath, and then washed with water until neutral to obtain a purified precursor; and finally, the precursor is subjected to staged high-temperature carbonization in a vacuum carbonization furnace. Through specific process parameters, the prepared hard carbon material has a hierarchical porous structure and a suitable graphite microcrystalline layer spacing, and has a low total content of metal impurities; when applied to a sodium ion battery negative electrode, the hard carbon material exhibits a high reversible specific capacity, a high initial coulombic efficiency, and excellent long cycle stability and rate performance.

The invention belongs to the technical field of nickel-based high-temperature alloy smelting, and relates to a method for preparing a low-aluminum-content GH3535 master alloy through vacuum induction smelting. The preparation method comprises the following steps: preparing a vacuum induction furnace from high-purity fused magnesium oxide; adding metal raw materials corresponding to Ni, Fe, Mo, Cu and Co into the vacuum induction furnace for melting down; then adding a raw material C, smelting and carrying out electromagnetic stirring to obtain a first melt; a Cr raw material is added into the first melt, argon and an oxidizing agent are sequentially added after melting down, then smelting and electromagnetic stirring are conducted, and a second melt is obtained; adding the raw material C into the second melt again, and performing smelting and electromagnetic stirring to obtain a third melt; adding raw materials corresponding to C, Si, Mn and Ti into the third melt, and performing smelting and electromagnetic stirring to obtain a fourth melt; and after gas in the fourth melt is completely separated out, vacuum pouring is conducted, and finally the GH3535 master alloy with the low aluminum content can be obtained.

This invention belongs to the field of livestock and poultry breeding wastewater treatment and agricultural reuse technology, specifically relating to an electrochemically enhanced low-pressure ultrafiltration system and method for reusing livestock and poultry breeding wastewater. The electrochemically enhanced low-pressure ultrafiltration system includes an inlet tank, a constant-level water tank, a gravity-driven low-pressure ultrafiltration membrane module, a water collection device, and a constant-pressure driving power supply. The gravity-driven low-pressure ultrafiltration membrane module includes a reactor, and an anode, an ultrafiltration membrane, and a cathode pre-filtration layer installed within the reactor. The cathode pre-filtration layer consists of a biofilter cake layer and a cathode. This invention, an electrochemically enhanced low-pressure ultrafiltration system and method for reusing livestock and poultry breeding wastewater, addresses the characteristics of livestock and poultry breeding wastewater by employing an externally sourced constant voltage-driven electrochemically enhanced gravity-driven low-pressure ultrafiltration system. It can simultaneously achieve heavy metal reduction, antibiotic degradation, pathogen interception, inhibition of resistance gene transmission, and membrane fouling control under low-energy consumption conditions, while retaining nitrogen and phosphorus resources in the wastewater, ensuring safe reuse for agricultural irrigation.

The invention discloses a method for removing metal pollutants by advanced oxidation enhanced filtration, which comprises the following steps: mixing raw water to be treated containing manganese pollutants with peroxymonosulfate, carrying out ultraviolet radiation, and carrying out oxidation reaction to obtain an oxidized water body; the oxidized water body is filtered through quartz sand, manganese pollutants are removed through reaction, and the purified water body is obtained. By adopting a method of coupling peroxymonosulfate, ultraviolet radiation and quartz sand filtration, the originally mild peroxymonosulfate can be converted into a relatively active oxidation system, the efficient oxidation of the manganese pollutants is realized, the required treatment time is short, and the treatment cost is low. The deep removal of manganese pollutants in low-concentration raw water can be realized under the conditions that a complexing agent is not added, an expensive special adsorbent is not used and a complex filter material is not used.

The application discloses a carbon nanotube acid bubble purification process and relates to the technical field of carbon nanotube purification. The process comprises the following steps: step S1, raw material pretreatment; step S2, multistage acid bubble purification; step S3, intensified water washing; step S4, drying treatment; and step S5, post-treatment. The complete process chain of raw material pretreatment, multistage acid bubble purification, intensified water washing, drying treatment and post-treatment is arranged, wherein the raw material pretreatment adopts a vacuum suction pump for feeding and combines with a bag dust collector for collecting dust, the multistage acid bubble purification is sequentially performed for primary, secondary and tertiary purification, and reaction conditions are accurately controlled, the intensified water washing starts to use an ultrasonic device to assist pressure filtration water washing, the drying treatment combines with a cyclone separator and a bag dust collector, and the post-treatment comprises screening, multistage magnetic removal and nitrogen filling packaging. Therefore, the problems of large product purity fluctuation and incomplete impurity removal caused by the incoherent process and rough parameter control in each link of the existing process can be solved.

This invention discloses a method for removing ammonia from crude fuel gas using dielectric barrier discharge plasma. The method includes the following steps: NO is added to NH3-containing crude fuel gas obtained from biomass gasification after dust removal. After thorough mixing in a gas mixer, the mixture enters a plasma reactor. In the plasma reactor at 200℃–450℃, NO and the NH3-containing crude fuel gas react under plasma activation, converting NH3 and NO into N2, H2O, and H2, thereby removing ammonia from the crude fuel gas. Furthermore, the added NO is consumed during NH3 removal, avoiding additional pollutants. Moreover, this method does not introduce a catalyst, reducing costs and avoiding low reaction stability caused by catalyst deactivation, enabling long-term stable operation of the equipment.

The application discloses an extraction method salt lake lithium extraction wastewater treatment system and a treatment method. The extraction method salt lake lithium extraction wastewater treatment system treatment system comprises: a gas floating unit for gas floating treatment of wastewater, outputting dregs and a first liquid; an adsorption unit for adsorbing impurities including at least a surfactant in the first liquid, outputting a second liquid; a filtration unit for filtering the second liquid, outputting a third liquid; a hydrogen production unit for electrolytic hydrogen production and removal of organic matter using the third liquid, outputting hydrogen and a fourth liquid; and a post-treatment unit for extracting lithium resources in the fourth liquid, outputting lithium products. The extraction method salt lake lithium extraction wastewater treatment system of the application has simple structure, low investment and operation cost, can not only realize deep removal of organic matter, but also can recover hydrogen resources and lithium resources, effectively solves the technical problem of high wastewater treatment cost in the prior art, and has strong practicability.

The invention relates to the technical field of sewage treatment equipment, and particularly discloses a biological filter for sewage treatment and a use method thereof. The filter tank comprises a first filter tank and a second filter tank, the first filter tank comprises a first biological filler layer, and a first working liquid level line is arranged above the first biological filler layer; a second biological filler layer, an electrochemical filler layer and a third biological filler layer are sequentially arranged in the second filter tank from top to bottom, a second working liquid level line is arranged above the electrochemical filler layer, and the volume ratio of the second biological filler layer to the electrochemical filler layer to the third biological filler layer is (2-3): 1: (0.5-2); the liquid supply system comprises a working water path and a backflow water path. According to the invention, through the design of the structure of the biological filter, including optimal combination and volume ratio control of each filler layer, a microenvironment beneficial to growth and enrichment of anaerobic ammonium oxidation bacteria and development of anaerobic ammonium oxidation reaction is successfully constructed.