14476 results about "Activated carbon" patented technology

The invention relates to the field of friction materials, and discloses a friction material with a stable friction coefficient for an electromagnetic brake and a preparation method of the friction material. An adhesive comprises polysiloxane modified phenolic resin, benzoxazine and butyronitrile rubber powder; the reinforcing material comprises 1414 para-aramid pulp, calcium sulfate whiskers, composite mineral fibers, copper fibers and modified needle-like wollastonite; the friction increasing material comprises macroporous shell activated carbon, friction particles, garnet powder, barite and nano hafnium nitride; the antifriction material comprises graphite fluoride, nylon and composite modified hydroxyl silicate; the composite modified hydroxyl silicate is obtained by modifying hydroxyl silicate with diisocyanate and stearic acid and then compounding silane modified micro-nano calcium carbonate. The friction material provided by the invention is used for improving the braking stability of an electromagnetic brake and reducing equipment vibration.

The invention discloses a positive electrode material for a zinc-bromine flow battery and a preparation method and application thereof, and belongs to the technical field of zinc-bromine flow batteries, the preparation method comprises the following steps: crushing and sieving an active carbon source, adding the active carbon source into a graphene oxide aqueous dispersion, stirring, centrifuging, removing supernate, drying, mixing with an activating agent, and activating in an inert atmosphere; washing to be neutral, drying and sieving to obtain a graphene / activated carbon composite material; and attaching the graphene / activated carbon composite material to a carbon-plastic bipolar plate to obtain the positive electrode material for the zinc-bromine flow battery. A graphene / activated carbon composite system is combined with a high-conductivity network, graded holes and surface functional groups, so that the reaction kinetics bottleneck of a traditional carbon material Br2 is broken through.

The invention discloses an activated carbon forming defect online detection method and device, and belongs to the technical field of material defect detection.The method comprises the steps that technological parameters are collected in real time and preprocessed, a parameter sequence is generated, self-sensing recognition of a new technology is conducted, lagged starting of a quality control vacuum period is avoided, and once the new technology is recognized, the quality control vacuum period is started. An unknown defect pre-recognition mechanism is triggered immediately, novel anomalies which do not conform to known defects are recognized, and an unknown defect candidate set is generated; constructing a multi-stage hierarchical detection network, performing adaptive detection on the unknown defect candidate set, establishing a reference model, screening samples, updating the reference model, and forming a defect identification model adaptive to a new process, so that the influence of insufficient samples on the detection accuracy is effectively relieved; and setting three-dimensional quantitative indexes, judging a transition period, automatically switching to a full-model detection mode when the indexes meet preset requirements, and objectively evaluating the recognition capability of the detection system on new process defects and the process suitability through the quantitative indexes.

The present invention pertains to the technical field of phase-change temperature-reducing materials, and in particular, relates to a phase-change temperature-reducing polyurethane composite material, and a preparation method and application thereof, comprising the following parts by mass of raw materials: 50-80 parts of polyurethane material A+polyurethane material B, 1-3 parts of flake graphite powder with a particle size of 850-1200 meshes, 0.8-1.8 parts of vermicular graphite with a particle size of 10-40 meshes, 10-30 parts of phase-change paraffin, 1-3 parts of activated carbon, 0.5-2 parts of catalyst, and 0.2-1 parts of co-catalyst. The polyurethane composite material made in the present invention is rapid in phase-change temperature reduction, high in heat absorption and dispersion, and free of problems of phase-change paraffin leakage, crystallization, and frosting on the surface thereof. At the same time, it also has softness and high elasticity, and can be widely applied to objects in contact with human bodies. A temperature difference is formed by reducing the temperature of the surface in contact with skin, which can bring a comfortable sense of coolness and a temperature-reducing effect to consumers.

The invention discloses a skid-mounted modular blending super activated carbon desulfurization and acid-making system and method, and belongs to the technical field of desulfurization and acid-making equipment.The current desulfurization unit is erected on the lower desulfurization unit, the upper desulfurization unit is pushed to rotate, the desulfurization units drive skid-mounted assemblies to deflect through stand columns, and then the desulfurization units are made to conduct desulfurization and acid-making. A clamping plate in the skid-mounted assembly can make contact with a baffle in the side blocking assembly in the rotating process till the clamping plate is attached to the inner wall of the baffle, a sliding plate is extruded through the elastic force effect of two springs in a sliding way, the sliding plate drives the clamping plate to be clamped into an operation hole, the clamping plate is limited through the operation hole, and the position of a stand column can be locked; and other desulfurization units can be mounted in the same way, so that the aim of carrying out modular assembly on the plurality of desulfurization units can be fulfilled, the desulfurization and acid making work by using a traditional integrally designed desulfurization tower is abandoned, and the stacking and maintenance work of the desulfurization units is facilitated.

The invention discloses an activated carbon pore regulation and control method and monitoring equipment, and belongs to the technical field of spectrum analys.The method comprises the steps that on the basis of a probability prediction model, spectrum scanning frequency is dynamically adjusted, and real-time global spectrum collection is carried out; the method comprises the following steps: setting a self-adaptive threshold value, extracting time sequence slope and acceleration by a dynamic sliding window, generating a time sequence change matrix, judging an abnormal spectrum, screening and analyzing unexpected signals, realizing accurate identification of known and new unexpected signals, and reversely deducing molecular configuration parameters through a characteristic peak position interval. Calculating a matching degree difference value between the pore size and the molecular configuration, and carrying out matching analysis to ensure the suitability analysis accuracy of the pore characteristics and the pollutant molecules; according to the matching degree difference value, porosity gradient regulation and control are carried out, real-time monitoring is carried out to verify the regulation and control effect, self-evolution is achieved, and the regulation and control efficiency and precision are continuously improved.

The invention belongs to the field of electrode materials, and relates to a cement-based electrode material capable of 3D printing and a preparation method and application thereof. The cement-based electrode material comprises 500 to 600 parts of cement, 10 to 25 parts of aluminum sulfate, 70 to 84 parts of surface activated carbon black, 150 to 300 parts of surface modified quartz sand, 7.5 to 15 parts of carbon fiber, 500 to 600 parts of water and 6 to 10 parts of a water reducing agent. The material has excellent mechanical properties and electrical properties, can realize integration of energy storage and structural functions, has high practical application value, and is especially applicable to the fields of intelligent building materials and green energy storage. And through the 3D printing technology, complex structure customization of the cement-based material can be achieved, structural energy storage integration is expected to be achieved, and a new thought is provided for development of a smart energy system in the building field.

The invention relates to the technical field of fireproof valves, and discloses an air conditioner smoke exhaust fireproof valve with a smoke filtering function, which comprises a valve body, a filtering and cleaning assembly is arranged in the valve body, the filtering and cleaning assembly comprises a sliding block, the interior of the sliding block slides in the valve body, the sliding block is connected with the valve body through a bolt, an activated carbon plate is fixed in the sliding block, and the activated carbon plate is connected with the valve body through a bolt. A filter screen is fixed in the sliding block, a motor is fixed to the lower surface of the sliding block, a rotating rod is fixed to the driving end of the motor, a first protruding block is fixed to the outer wall of the rotating rod, and a second protruding block is fixed to the outer wall of the rotating rod; and the discharging assembly is arranged at the bottom end of the valve body. Through cooperation of internal structures of the filtering and cleaning assembly, a filter screen and an activated carbon plate are rapidly and effectively cleaned, meanwhile, a multi-section type cam and a telescopic rod component are designed, different amplitudes or beating strengths are provided, it is ensured that the vibration effect can evenly cover all areas of the filter screen, and local cleaning blind areas of the filter screen are reduced.

A supercapacitor including a gel electrolyte and two electrodes having a substrate, date stone activated carbon, a conductive carbon compound different from the date stone activated carbon, and a binding compound. A mixture of the date stone activated carbon, the conductive carbon compound, and the binding compound partially coats a surface of the substrate. The two electrodes are assembled in a symmetrical layered configuration with the surfaces coated with the mixture facing each other. The gel electrolyte is present between the surfaces coated with the mixture to form the supercapacitor. The gel electrolyte is a mixture of H2SO4, polyvinyl alcohol, and anthraquinone. Particles of the date stone activated carbon have a nanosheet morphology, and the nanosheets are stacked on top of each other to form a hierarchical structure.

The invention discloses a preparation method of a high-dispersion and high-thermal-conductivity filler based on carbon black, and relates to the technical field of carbon black modification, and the preparation method specifically comprises the following steps: treating carbon black in a first acid solution to obtain activated carbon black; treating the single-walled carbon nanotube in a second acid solution to obtain an activated single-walled carbon nanotube; treating the activated single-walled carbon nanotube with a sulfanilamide solution to obtain a functionalized single-walled carbon nanotube; placing the graphene nanosheets in a third acid solution for treatment to obtain activated graphene nanosheets; the preparation method comprises the following steps: mixing amino silane hydrolysate and epoxy silane hydrolysate, adding activated carbon black, functionalized single-walled carbon nanotubes and activated graphene nanosheets, and treating to obtain a pre-modified filler; amino acid and a cross-linking agent are pre-polymerized to obtain an amino acid pre-polymerized solution, and the pre-modified filler is treated by the amino acid pre-polymerized solution to obtain the high-dispersion and high-thermal-conductivity filler. The method disclosed by the invention is simple to operate and low in energy consumption, the prepared filler is good in thermal conductivity and good in dispersity in a polymer matrix, and the thermal conductivity and the mechanical property of a polymer are greatly improved.

The invention discloses an organic waste gas purification treatment device, which comprises an adsorption purification structure and an auxiliary adjustment structure, the adsorption purification structure is a tank body, the upper part in the adsorption purification structure is connected with an activated carbon filter layer through a bolt, and steam moving sheets are arranged in steam hoods on the upper and lower ring surfaces of the adsorption purification structure and are connected with a steam main pipe and a steam auxiliary pipe through pressure relief conduits; the auxiliary adjusting structure is arranged on the left side of the adsorption purification structure and communicated with the lower end, a cavity dividing plate, a supporting frame body and other components are arranged in the organic waste gas pipe body, and a hydraulic pipe on the supporting frame body is connected with a high-concentration blocking net plate and connected with a gas supply pipe and a water supply pipe through a series of mechanical transmission; when the device is used, low-concentration organic waste gas can be directly purified; when high-concentration and high-temperature organic waste gas is treated, the waste gas and supplementary gas can be mixed, cooled and concentrated, so that the waste gas and supplementary gas meet activated carbon adsorption conditions, and meanwhile, steam can be utilized to push the steam movable sheet to construct a closed environment, so that organic matters adsorbed by activated carbon are quickly desorbed and output and recovered along with the steam.

The invention relates to a method for treating nitrogen and phosphorus-containing cleaning wastewater, which comprises the following steps: adding residual activated sludge, activated carbon and a nitrogen and phosphorus removal bacterial agent into a treatment system, carrying out braising exposure treatment, and regularly adding an organic carbon source; the nitrogen and phosphorus removal bacterial agent at least contains microbacterium kitamiense (PR) and aeromicrobe (Aeromicrobe tamlense) (PW), and is characterized in that the nitrogen and phosphorus removal bacterial agent at least contains the microbacterium kitamiense (PR) and the aeromicrobe tamlense (PW); the preservation numbers of the strain are respectively CGMCC (China General Microbiological Culture Collection Center) No. 25182 and CGMCC No. Starting water feeding after braising exposure is finished, and continuously operating to treat the cleaning wastewater. According to the method, total nitrogen, total phosphorus and COD in the wastewater can be efficiently removed at the same time in one structure, the treatment burden of a subsequent biochemical unit is avoided, the process is simple, and the cost is low.

The invention discloses an environment-friendly cementing material capable of efficiently adsorbing formaldehyde and a preparation method of the environment-friendly cementing material, and relates to the technical field of formaldehyde adsorption materials, and the environment-friendly cementing material is prepared from the following raw materials in parts by weight: 30-50 parts of activated carbon powder, 10-20 parts of diatomite powder, 8-10 parts of metal organic framework powder, 12-18 parts of a natural gelatinizing agent, 1-2 parts of a plasticizer and 2-4 parts of nano titanium dioxide. The activated carbon powder has an extremely high specific surface area and can effectively adsorb formaldehyde molecules in air. The porous structure of the diatomite powder increases the adsorption capacity of the material, and improves the formaldehyde removal efficiency. The metal organic framework powder has a unique pore structure and chemical properties, and can specifically adsorb formaldehyde and other volatile organic compounds (VOCs). The environment-friendly cementing material has the advantages of being efficient in formaldehyde adsorption, environment-friendly, durable, multifunctional, easy to process, economical, practical and the like, and is an ideal indoor air purification material.

The invention provides an activated carbon fiber capable of efficiently removing formaldehyde and a preparation method thereof, the activated carbon fiber is of a composite material fiber structure of porous TiO2 derived from activated carbon and a metal organic framework (MOF), and the preparation method of the composite material comprises pretreatment of activated carbon, preparation of a Ti-MOF precursor and preparation of TiO2 / activated carbon fiber. According to the invention, the MOF-derived porous TiO2 / activated carbon composite fiber structure is constructed, physical adsorption and photocatalytic degradation functions are cooperated, and the limitation of single adsorption capacity is broken through; the interface bonding problem of the MOF derivative and the activated carbon is solved, and high-dispersion loading and stable and firm compounding of the active components are realized; a process path capable of realizing large-scale preparation is provided, and continuous production of the composite fiber is realized through an electrostatic spinning technology.

The invention particularly relates to printing and dyeing wastewater advanced treatment equipment and a method thereof. The equipment comprises a pretreatment unit, an electrolysis unit, a pH regulation unit, a post-treatment unit and a comprehensive monitoring unit, the pretreatment unit comprises a physical filtering device and an advanced oxidation pretreatment device and is used for removing suspended solids and macromolecular organic matters; the electrolysis unit is provided with a current control module and a salinity adjusting module and is used for degrading organic pollutants and disinfecting and sterilizing; the pH adjusting unit is provided with a pH sensor and a pH correction pump and is used for accurately controlling the pH value change in the treatment process; the post-treatment unit comprises an ultrafiltration membrane and activated carbon and is used for removing residual micromolecular organic matters and trace heavy metal ions; the comprehensive monitoring unit integrates a PLC controller, a data acquisition module and a communication interface, and is used for realizing automatic management and remote monitoring of the system.

The invention relates to the technical field of aquaculture, discloses a treatment device for aquaculture wastewater, and solves the problems that the concentration value uniformity of a mixing area of a large amount of wastewater and a medicament is relatively low, a large amount of time is needed for reaction, and the efficiency is low in an existing treatment device for the aquaculture wastewater. The device comprises a device main body, a water inlet pipe and a water outlet pipe which are connected to one side of the device main body, and a filter screen and an adsorption activated carbon plate which are arranged in the device main body, through a medicine tank and a medicine adding structure, quantitative medicine feeding is carried out according to the water conveying amount to adjust the PH value, accurate medicine adding is achieved, and a medicine storage barrel is linked with a water pressure plate; quantitative dosing is performed according to the amount of wastewater, rapid outflow and mixing of chemicals are promoted, the reaction efficiency is improved, wastewater is fully utilized to input a power linkage mixing structure, the chemicals and the wastewater are fully and uniformly mixed, a built-in column and an expansion plate of the rotating column can also enlarge the mixing range, and the uniformity and stability of the treatment effect are ensured.

An electrode including a substrate, a binding compound, and a composite. The composite includes jute-activated carbon and a nickel-cobalt-layered double hydroxide (NiCoLDH). Particles of the NiCoLDH are in the form of nanoflowers with an average size of 5-15 μm. The nanoflowers comprise nanosheets with an average thickness of 5-20 nm. The particles of the jute-activated carbon are in the form of interconnected nanosheets, which form a porous carbon framework. The porous carbon framework connects the nanoflowers, thereby forming an interconnected structure in the composite. A mixture of the composite and the binding compound is coated on the surface of the substrate. The electrode can be included in supercapacitors and power banks.

The invention discloses a MOF@PS@HAC composite adsorbent, a preparation method and an application thereof. The steps include preparing hydrophobically modified activated carbon, preparing a styrene resin intermediate layer and preparing a MOF@PS@HAC composite adsorbent. The invention relates to the technical field of composite adsorbents. The MOF@PS@HAC composite adsorbent prepared by the invention has a full range of adsorption types. When the composite adsorbent contacts a mixed gas containing a plurality of AMCs, acidic gas molecules strongly interact with basic functional groups such as amino groups on the surface of MOF crystals, thereby fixing the acidic gas molecules on the surface or in the pores of the MOF material. The basic gas reacts with the sulfonic acid groups on the intermediate layer resin to generate an acid-base neutralization reaction. VOCs such as toluene continue to diffuse rapidly along the pore structure of the resin, and combine with adsorption sites on the surface of the core layer activated carbon, thereby finally achieving efficient adsorption of a plurality of AMCs.

The invention relates to the technical field of waste gas treatment, and particularly discloses a dynamic management method and system for industrial waste gas treatment, and the system comprises a region division module which is used for dividing an adsorption bed layer in adsorption equipment into a plurality of monitoring regions with similar sizes in a waste gas treatment process, by combining waste gas data at a waste gas outlet for coupling analysis, high-quality real-time waste gas concentration data can be obtained after coupling treatment on the basis of diversified data, and then the concentration of the waste gas is determined based on the data and state data of adsorption equipment in the waste gas treatment process. The real-time adsorption saturation of the adsorption equipment can be accurately analyzed, and the data reflects the adsorption saturation of the current activated carbon adsorption bed layer, so that the waste gas collection air volume can be optimized by dynamically adjusting the waste gas collection air volume through the air speed adjusting module subsequently based on the data, and the desorption of attachments is accelerated; the waste gas treatment effect is improved.

The invention belongs to the technical field of sound-absorbing materials, and particularly relates to a composite sound-absorbing material as well as a preparation method and application thereof. The composite sound-absorbing material comprises a foaming base material and sound-absorbing particles, the sound-absorbing particles are dispersed in the foaming base material; the foaming base material is a polyurethane material; the sound-absorbing particles comprise at least one of a metal organic framework compound, activated carbon, aerogel, carbon nanotubes and graphene. The sound-absorbing particles are dispersed in the foaming base material, so that obvious concave-convex structures are formed around foam holes of the sound-absorbing material, and the sound wave transmission resistance can be increased. Besides, the sound-absorbing particles with specific types, specific surface areas and pore diameters and porous structures are adopted, the number of internal pore channels is large, multi-angle collision of airflow in the pore channels can be enhanced, and the composite sound-absorbing material has a good sound-absorbing effect at low and medium frequencies.

The invention relates to a functional microorganism-containing organic-inorganic compound fertilizer and a production method thereof, and relates to the technical field of fertilizers, the functional microorganism-containing organic-inorganic compound fertilizer comprises an inorganic core layer, an organic coating layer and a functional microorganism outer layer, the functional microorganism outer layer comprises the following components in parts by mass: 10-15 parts of compound functional microorganisms, 5-10 parts of synergistic growth-promoting microorganisms, 2-3 parts of trehalose, 1-2 parts of mannitol, 10-15 parts of sodium alginate, 8-10 parts of chitosan, 2-4 parts of a yeast extract and 30-40 parts of a modified activated carbon carrier. The production method comprises the following steps: preparing an inorganic core layer, preheating the inorganic core layer, and spraying and coating an organic coating layer material to obtain a primary product with an organic coating layer; and coating the surface of the organic coating layer of the primary product with a functional microorganism outer layer material, drying at low temperature, and screening to obtain the organic-inorganic compound fertilizer containing the functional microorganisms. The fertilizer has the effect of improving the slow release effect of the fertilizer and the survival rate of microorganisms.

The invention relates to a recyclable composite water purifying agent and a preparation method thereof, and belongs to the technical field of high polymer materials. The recyclable composite water purifying agent comprises the following components in parts by weight: 12-18 parts of activated carbon, 20-25 parts of diatomite, 15-25 parts of polyaluminum chloride, 6-12 parts of a modified flocculant, 5-10 parts of polyethylene glycol, 1-3 parts of a modified photocatalyst and 250-370 parts of deionized water, the recyclable composite water purifying agent prepared by the invention not only has a good pollutant adsorption effect, but also has an excellent antibacterial effect.

The invention discloses a method for synthesizing tetrahydrofuran from furfural in one step and a preparation method of a catalyst for the tetrahydrofuran. The catalyst is a bimetallic catalyst, bimetallic is M1 and M2, M1 is Pd, and M2 is selected from one of Pt, Rh, Ru, Ni, Cu, Co, Mn and Ce; the catalyst comprises an active component and a carrier, the bimetallic is the active component, and the carrier is selected from at least one of activated carbon, silicon dioxide, aluminum oxide, magnesium oxide, an S-1 molecular sieve, a ZSM-5 molecular sieve, a Beta molecular sieve, an MOR molecular sieve and a Y molecular sieve; based on the total weight of the catalyst, the loading capacity of M1 is 0.5-3.5%, and the loading capacity of M2 is 0.5-3.5%. The catalyst provided by the invention can be used in a reaction for preparing tetrahydrofuran through furfural hydrogenation, and can improve the conversion rate of furfural and the selectivity of tetrahydrofuran.

The present invention generally relates to a system for producing activated carbon from cow dung. The process begins with a drying and washing unit to pre-treat the raw material. Dried cow dung is then milled and sieved to a specific particle size. A second drying step prepares the sieved material for carbonization in a nitrogen atmosphere. The resulting carbonized material undergoes chemical activation using a sodium hydroxide solution. Subsequent pyrolysis in a nitrogen environment further develops the pore structure of the activated carbon. The pyrolyzed material is then washed with hydrochloric acid to remove impurities. A final drying step yields the desired activated carbon product, which is then crushed. This system provides a controlled and efficient method for converting cow dung into valuable activated carbon, offering a sustainable waste management solution and a source of high-quality material for various applications.

The invention discloses a medical instrument sealing performance detection device with an intelligent sensor, and relates to the technical field of sealing, the medical instrument sealing performance detection device comprises a sealing tank, a detection device and a pressure reduction device, and the top of the sealing tank is provided with a sealing cover; wherein the detection device comprises a conveying pipe, an air exhaust box, an air exhaust machine, a first sliding groove, an air pressure rod, an L-shaped short rod, a spiral rod and an activated carbon plate, the output end of the air exhaust machine moves downwards to evacuate air in the sealing tank, when the air in the sealing tank is evacuated, the air pressure rod is driven to move towards the interior of the sealing tank, and whether the air pressure rod moves or not is observed; the air pressure rod moves towards the interior of the sealing tank, the sealing performance is good, and no leakage is generated, the conveying pipe fixedly penetrates through the surface of the sealing tank, the air exhaust box is fixedly installed at the bottom of the conveying pipe, a conveying belt of the air exhaust box is provided with a groove, through rotation of the activated carbon plate, the surface area between contact harmful gas and activated carbon can be increased, and the adsorption efficiency is improved.

The invention provides a system and a method for treating coexisting new pollutants in drinking water, and the system and the method are characterized in that firstly, ozone microbubble water with small volume and large specific surface area and magnetized superfine activated carbon are used for carrying out oxidation treatment on the coexisting new pollutants and adsorbing pollutants with small molecular weight and relatively high activity; the purpose of removing part of new pollutants is achieved; then, under the irradiation of an ultraviolet lamp tube, the reducing agent catalyzes sulfite to generate reducing free radicals such as hydration electrons [eaq-],. H and SO3., and under the substitution action of iodide ions, reductive dehalogenation and iodine substitution reaction of the halogenated organic matter difficult to degrade are achieved, and reduction removal of new pollutants difficult to degrade is achieved. The system is simple and compact in structure, is a treatment device integrating filtration, oxidation, adsorption and reduction, reduces the occupied area, can realize effective removal of coexisting new pollutants with different molecular characteristics and different reaction activities through multiple actions of physical interception, oxidation, adsorption, reduction and the like, and has a wide application prospect.

The invention relates to the technical field of environment-friendly additives, and discloses an environment-friendly additive for soil pollution remediation and an application method thereof.The environment-friendly additive is prepared from 5-20 parts of nano zero-valent iron, 2-15 parts of a nano carbon material and 3-18 parts of a nano mineral composite material; 5-25 parts of biochar, 2-10 parts of microbial flora and 1-10 parts of a plant source extract; 1-8 parts of a pH responsive material; 2-10 parts of a microcapsule material; the particle size range of the nanoscale zero-valent iron is 10-100 nm, and SiO2 or C is coated on the surface of the nanoscale zero-valent iron; the nano carbon material is selected from activated carbon nanoparticles, graphene and carbon nanotubes. The carbon-coated nano zero-valent iron is adopted, so that the technical effects of improving the oxidation resistance of the material and prolonging the active life are achieved. Compared with a traditional technical scheme without coating nZVI, the problems that the composite material is prone to oxidation inactivation and insufficient in long-term repair capacity are solved, and the composite material has more stable heavy metal removal performance in a complex environment.

The invention relates to the technical field of retired ternary power battery recovery, and particularly discloses a method for preferentially extracting lithium and recovering valuable metals from a retired ternary lithium battery and application of the method. According to the method, the traditional process is broken through the preferential lithium extraction, and efficient recovery of lithium, Ni, Co and Mn is realized by utilizing'fast-medium-slow 'multi-stage cooperation of a composite reducing agent and accurate adaptation of roasting and leaching parameters, so that the method has the advantages of low cost, high efficiency, low energy consumption and the like, and is suitable for large-scale industrial production. The method is low in energy consumption and environment-friendly, and is applied to resource recycling of the retired ternary lithium battery, and the precursor can be used for reproducing a positive electrode material or used for a catalytic material.

The invention discloses activated carbon adsorption and desorption catalytic combustion equipment, and belongs to the field of waste gas treatment. The activated carbon adsorption and desorption catalytic combustion equipment comprises a spray tower, a dry filter, a catalytic combustion furnace, a heat exchange mechanism, an exhaust fan and a discharge pipe, an air inlet pipe is arranged at the air inlet end of the spray tower, and a first connecting pipe is arranged between the air outlet end of the spray tower and the air inlet end of the dry filter; the air inlet end of the air exhaust fan is provided with an air exhaust pipe, and the air exhaust end of the dry filter is provided with a second connecting pipe; the first gas inlet pipe is arranged at one end of the adsorption tower, and the first gas inlet pipe is communicated with the second connecting pipe; the catalytic efficiency of desorbed organic matters is effectively improved, meanwhile, small-particle dust is effectively prevented from being attached to the main activated carbon plate to affect the adsorption effect and the desorption effect, and waste gas is effectively prevented from being exhausted into the atmosphere to pollute the air.

The invention relates to the technical field of preparation of lithium battery materials, and discloses a synthesis method of a low-cost battery-grade lithium dihydrogen phosphate raw material lithium phosphate. The synthesis method comprises the following steps: dissolving crude lithium sulfate in alkaline lithium phosphate lithium precipitation mother liquor; carrying out chemical precipitation on the filtered lithium sulfate solution to preliminarily remove calcium, and subsequently, deeply removing calcium and COD (Chemical Oxygen Demand) by sequentially using activated carbon and calcium removal resin to obtain a lithium sulfate finished solution; mixing the lithium sulfate completion liquid and the alkali liquid, freezing to-10 DEG C to-3 DEG C, and performing centrifugal separation to obtain a lithium sulfate freezing liquid; and reacting the refrigerating fluid with a dilute phosphoric acid solution to precipitate lithium phosphate, stirring, washing and centrifuging the filtered crude product lithium phosphate, and drying to obtain the battery-grade lithium dihydrogen phosphate raw material lithium phosphate. The lithium phosphate prepared at low cost is used for replacing battery-grade lithium carbonate, lithium hydroxide and the like as a lithium source for producing the lithium dihydrogen phosphate, so that the production cost of the battery-grade lithium dihydrogen phosphate can be effectively reduced, the lithium phosphate mother liquor is recycled, and the problem of treating a large amount of wastewater caused by other methods is solved.