363 results about "Active phase" patented technology

The invention discloses an impregnation liquid for preparing hydrogenated bisphenol A through bisphenol A hydrogenation. The impregnation liquid comprises a Ru complex, a water-soluble nonionic surfactant and water, wherein the molecular size of the Ru complex is greater than 1nm. According to the preparation method disclosed by the invention, by adopting the impregnation liquid containing the Ru complex of which the molecular size is greater than 1nm and the water-soluble nonionic surfactant, more Ru complex of which the molecular size is greater than 1nm can exist in mesoporous channels of an activated carbon carrier in an impregnation process, so that the contact probability of an active phase and a reactant bisphenol A molecule is increased; the purposes of improving the active metal utilization rate and improving the catalyst activity are achieved.

The present invention relates to a process for trapping mercaptans contained in a sulfur-containing hydrocarbon feedstock which is optionally partially desulfurized, resulting from a step of catalytic hydrodesulfurization, at a temperature of between 40° C. and 250° C., a pressure of between 0.2 MPa and 5 MPa, at an hourly space velocity, defined as the volume flow rate of feedstock at the inlet per volume of trapping mass, of between 0.1 h−1 and 50 h−1, in the presence of a trapping mass comprising an active phase based on at least one group VIII, IB or IIB metal, and a porous oxide or oxide mixture, the active metal of which has been activated beforehand by reduction and then passivated for the loading thereof by carbon dioxide treatment.

The invention discloses a preparation method of a hydrofining catalyst for petrochemical engineering. The preparation method comprises the following steps: step a, carrier pretreatment: putting an aluminum oxide precursor into a dilute nitric acid solution with the mass fraction of 1-5%, dipping for 2-4 hours, and drying at 120-150 DEG C for 3-6 hours; the comprehensive performance of the catalyst is remarkably improved by modifying the alumina carrier with phosphoric acid and optimizing an active component loading process; a gradient acid center is constructed on the surface of the carrier through phosphoric acid treatment to promote adsorption and dissociation of the sulfur / nitrogen-containing compound; the dispersion degree of the active phase is enhanced and high-temperature sintering is inhibited by a bimetal synergistic loading strategy; the pore structure evolution is effectively controlled by a segmented drying and stepped heating roasting process, a through type mesoporous network is formed, and the macromolecular diffusion efficiency is improved; the obtained catalyst is improved in activity in diesel oil hydrodesulfurization, improved in mechanical strength and prolonged in service life.

Process for trapping mercaptans contained in a sulfur-containing hydrocarbon feedstock, in the presence of a trapping mass comprising an active phase based on at least one group VIII, IB or IIB metal, and a mesoporous support comprising a bimodal distribution of mesopores, said trapping mass comprising a specific surface area of between 120 m2 / g and 350 m2 / g, and:the volume of mesopores with a diameter greater than or equal to 2 nm and less than 20 nm corresponds to between 35% and 70% by volume of the total pore volume of said trapping mass;the volume of mesopores with a diameter greater than or equal to 20 nm and less than 50 nm corresponds to between 25% and 60% by volume of the total pore volume of said trapping mass.

The invention discloses a vanadium catalyst for preparing sulfuric acid through wet conversion as well as a preparation method and application of the vanadium catalyst, and belongs to the technical field of catalysts. By improving a catalyst formula and a preparation process, a silicate aid is added to generate crystal silicon dioxide to regulate the structure of a diatomite carrier, and the heat resistance and hydrothermal stability of the catalyst are improved; the rare earth additive is added to modulate the active phase of the catalyst, so that the activity of the catalyst in a wide temperature range (380-600 DEG C) is improved, and the requirement of modern development of preparing sulfuric acid by wet conversion can be met. The preparation method is improved on the basis of a traditional vanadium catalyst wet mixing method preparation process, the active component of the catalyst is changed into slurry from colloid, uniform mixing of the active component and a carrier is facilitated, the active component is uniformly dispersed, the utilization rate of the active component is increased, and the performance of the catalyst is improved.

The invention discloses a method for efficient photo-thermal catalytic degradation of sulfur-containing organic gas. A preparation method of a sulfur-resistant catalyst comprises the following steps: (1) salt containing sulfur-resistant active metal A and an accelerant are added into water to obtain a salt solution of the active metal A, and the active metal A is selected from more than one of Fe, Co, Cu, Mn, Ni, Pt and Sr; (2) adding a salt solution containing an active phase metal B into the carbon dioxide nanotube, carrying out vacuum-assisted confinement, drying and reducing to obtain an active phase material for degrading the sulfur-containing organic gas in the confinement of the titanium dioxide nanotube, the active phase metal B being selected from more than one of Fe, Co, Cu, Mn, Ni, Pt and Sr; and (3) adding the active phase material of the titanium dioxide nanotube for confinement degradation of the sulfur-containing organic gas into the salt solution of the active metal A for coupling to obtain the sulfur-resistant catalyst. According to the method provided by the invention, the catalyst shows excellent catalytic performance in light and heat catalytic systems.

The present invention discloses a gas-phase preparation method of 1,1,1,4,4,4-hexafluoro-2-butyne. Using a mixture of 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-butene and hydrogen as raw materials, under the action of a particulate catalyst, 1,1,1,4,4,4-hexafluoro-2-butyne is obtained through a one-step hydrodechlorination reaction. The catalyst includes a carbon carrier and an active phase in the form of hollow spheres supported on the carbon carrier. The active phase includes: a first metal selected from at least one of silver, copper, nickel, and cobalt; and a second metal selected from at least one of palladium, platinum, and rhodium. The present invention has the advantages of high product selectivity, high catalytic activity, obtaining the reaction product through a one-step reaction, and being suitable for industrial application, etc.

A composition comprising a promotor component is disclosed comprising a mixture of one or more catalytically active components and one or more oxidized disulfide oil (ODSO) compounds, including a water-soluble fraction of ODSO. A composition comprising an aqueous solution of one or more catalytically active components and a promotor component is also disclosed. In certain embodiments the ODSO is obtained from the effluent of an enhanced MEROX process. The compositions facilitate transfer of catalytically active components (or components that will be catalytically active in the finished solid catalyst material) onto the surface of support materials.

The invention relates to the technical field of catalysts, in particular to a desulfurization catalyst and application thereof in hydrodesulfurization. The desulfurization catalyst adopts a hollow core shell, a weak acid site is constructed on a shell surface, and a boron-containing polymerization network is formed through surface-initiated polymerization; and linear / branched polyethyleneimine complexation is used for synergistically introducing Ni and Mo, in-situ vulcanization is performed after inert atmosphere pretreatment, and a dispersed nickel molybdenum sulfide active phase and shallow and deep double-peak metal distribution are obtained. The structure inhibits excessive hydrogenation while ensuring diffusion and structural stability, promotes a direct desulfurization path, and shows high conversion and high selectivity to 4, 6-dimethyl dibenzothiophene. The catalyst has low hydrogen consumption, high aromatic hydrocarbon retention and cycling stability, and is suitable for deep desulfurization of diesel oil and preparation of ultralow-sulfur fuel.

The invention relates to a green catalysis method for improving phenylacetylene hydrogenation selectivity and a catalyst preparation method. The method mainly solves the problems of high catalyst cost, difficult realization of large-scale commercialization and the like caused by large usage amount of noble metals in alkene preparation through alkyne selective hydrogenation at present. According to the green catalysis method for improving phenylacetylene hydrogenation selectivity and the catalyst preparation method, preparation is simple, the usage amount of precious metal is low, H2Ti3O7 intrinsic ion exchange performance is utilized, a Pd active phase is inserted into crystal lattices of the catalyst, continuous active sites are separated, styrene excessive hydrogenation reaction is inhibited, and the selectivity of the catalyst is improved.

The invention discloses a method for preparing aviation kerosene from biogas through reforming and Fischer-Tropsch reaction. The method comprises the following steps: firstly, reforming the biogas and water vapor into synthesis gas on a Ni / MgO-Al2O3 catalyst; then preparing aviation kerosene through Fischer-Tropsch synthesis on a Co-molecular sieve bifunctional catalyst; and then C1-C7 low-carbon chain hydrocarbon generated by Fischer-Tropsch synthesis enters a reforming cycle. According to the bifunctional catalyst in the Fischer-Tropsch synthesis process, cobalt acid salt and organic alkaline quaternary ammonium salt in molecular sieve synthesis react to generate TPACoO2, TEACoO2 or TMACoO2 through an acid-base pair strategy, and meanwhile, the quaternary ammonium salt is a template agent in molecular sieve synthesis, so that Co can be directionally packaged in a molecular sieve. According to the synthesis method, the size and dispersity of the Co active phase can be controlled, meanwhile, due to the influence of pore channels and acidity of the molecular sieve, synthesis gas can be converted into aviation kerosene (C8-C16) in a high-selectivity mode, and meanwhile the isomerization degree of paraffin is improved. The invention develops a new route for preparing high-quality aviation kerosene from biogas.

The present invention relates to a method for hydrogenating CO2 by means of the reverse water gas shift (RWGS) reaction by bringing a feedstock of a gaseous mixture comprising CO2 and hydrogen into contact with a catalyst comprising a nickel- and copper-based active phase and a silica or silica-alumina support, the active phase being in the form of bimetallic nanoparticles corresponding to the formula NixCuy where x = 1 and y is between 1 and 3, said nanoparticles having a number-average diameter of less than 10 nm with a standard deviation relating to the size of said nanoparticles of less than or equal to 50% of said average diameter.

The invention provides benzoyl peroxide gel and a preparation method thereof. The preparation method comprises the following steps: S1, preparing an active phase; s2, preparing a gel phase; s3, mixing half of the active phase with the gel phase, and performing constant-temperature water bath to obtain low-crosslinking-degree gel; s4, uniformly granulating the low-crosslinking-degree gel, mixing the low-crosslinking-degree gel with the balance of the active phase, and performing vacuum negative-pressure stirring twice to obtain a material; and S5, adding a pH regulator into the material, regulating the pH value, discharging and filling. Nanocrystals are formed through benzoyl peroxide pretreatment, the surface area and activity are improved, the curative effect is enhanced on the premise of safety, uniform dispersion can be achieved, the stability of benzoyl peroxide in gel is improved, and the storage time is prolonged. A part of the active phase and the gel phase are mixed to form low-crosslinking-degree gel, the low-crosslinking-degree gel is uniformly granulated and then mixed with the remaining active phase, and the benzoyl peroxide gel is prepared through vacuum negative pressure, so that the swelling property can be improved, the stability and the permeability can be improved, and adverse reactions such as irritation to skin can be avoided.

The invention discloses a biomass conversion catalyst and a preparation method and application thereof, the catalyst comprises a carrier and active metal components, and the active metal components are distributed on the surface and in pores of the carrier; the carrier is of a core-shell structure comprising an inner core and a shell layer, the inner core is a ZSM-5 molecular sieve containing micropores and mesopores, and the shell layer is a mesoporous MCM-41 molecular sieve. The invention also provides a preparation method and application of the biomass conversion catalyst. A high-activity composite structure catalyst is formed by modulation of a carrier pore channel structure and introduction of a metal active phase, multiple functions of catalytic cracking, reforming, carbon deposition inhibition and the like are integrated, efficient and accurate cracking of macromolecular compounds in raw materials is achieved in a catalytic pyrolysis reaction, meanwhile, carbon deposition is effectively inhibited, side reactions are reduced, and the service life of the catalyst is prolonged. A high-quality bio-oil product is obtained.

The invention discloses a hydrophobic modified manganese-doped copper-based catalyst for preparing methanol through CO2 thermal reduction hydrogenation as well as a preparation method and application of the hydrophobic modified manganese-doped copper-based catalyst, and belongs to the technical field of catalysts. The preparation method of the catalyst comprises the following steps: mixing a metal salt mixed solution of a copper salt, a zinc salt, an aluminum salt and a manganese salt with an alkaline solution of a sodium salt, and controlling the pH value; heating, aging, standing and layering; washing the precipitate, drying and roasting to obtain a manganese-doped copper-based catalyst to be hydrophobically modified; the preparation method comprises the following steps: carrying out a hydrothermal reaction on divinyl benzene and a DMF solution of epoxy resin, washing and drying a white solid obtained by the reaction to obtain a hydrophobic material nano-porous polydivinyl benzene; the preparation method comprises the following steps: mixing a hydrophobic material and a manganese-doped copper-based catalyst to be hydrophobically modified, grinding, tabletting and forming to obtain the hydrophobically modified manganese-doped copper-based catalyst. The CO2 adsorption capacity of the catalyst is improved, the monatomic dispersion degree of the catalyst is promoted, and large-scale low-steric-hindrance hydrophobic modification of an active phase is realized.

The invention relates to the technical field of catalysts, and particularly discloses a composite catalyst for preparing acrolein through catalytic oxidation of propylene and a preparation method of the composite catalyst, the composite catalyst comprises an active component I and an active component II, and the use mass ratio of the active component I to the active component II is 1: (1-19); the active component I is bismuth tungstate microspheres obtained by a hydrothermal synthesis method, and the general formula of the active component I is BiaW1Ox; the active component II is a multi-metal oxide obtained by a coprecipitation method, and the general formula of the active component II is Mo < 12 > Bi Co < c > Ni < d > Fe < e > A < f > B < g > O < y >; the bismuth tungstate microspheres obtained by a hydrothermal synthesis method and the multi-metal oxide obtained by a coprecipitation method are mixed to obtain the composite catalyst, so that the bismuth tungstate microspheres with microsphere structures can be used as active phases of reaction, and the specific surface area and the pore volume of the composite catalyst can be increased; the catalyst is suitable for a reaction for preparing acrolein through propylene catalytic oxidation under high load.

The invention belongs to the technical field of catalysts, and particularly relates to a Fe-based catalyst, a preparation method thereof and application of the Fe-based catalyst to preparation of low-carbon olefin through CO2 hydrogenation. The Fe-based catalyst comprises a carrier, transition metal elements and alkali metal elements, wherein the transition metal elements and the alkali metal elements are loaded on the carrier; the carrier is formed by pyrolyzing a carbamide compound; the carbon atom number of the carbamide compound is less than or equal to 10; the transition metal element comprises Fe. Compared with the prior art, the alkali metal element is introduced into the catalyst, so that the CO2 adsorption capacity of the Fe-based catalyst can be enhanced, and the CO2 conversion rate is increased; in addition, the carbonization efficiency of the Fe-based catalyst can be effectively promoted, and the formation of an iron carbide active phase is promoted; moreover, the Fe-based catalyst shows good catalytic activity when being used in a reaction for preparing low-carbon olefin through CO2 hydrogenation, has an industrial application prospect, and also has relatively high low-carbon olefin selectivity.

The invention provides a preparation method of a MoS2 / MXene moire heterogeneous synergistic catalyst, which comprises the following preparation steps: selectively etching a Ti3AlC2 precursor by adopting LiF and HCl to obtain a two-dimensional MXene nanosheet; the preparation method comprises the following steps: mixing an MXene solution with Na2MoO4, CH4N2S and citric acid in proportion, and ultrasonically dispersing in a water solvent to form a precursor solution; by regulating and controlling the proportion of the 1T / 2H-MoS2 phase, the conductivity and the stability are both considered, and the synergistic effect of the MoS2 as an electrocatalytic active phase is improved; the orientation and the torsional angle of MoS2 are regulated and controlled on a two-dimensional MXene substrate, a periodic Moire superlattice structure is constructed, and electron coupling and energy band alignment are enhanced; by constructing a collaborative interface system, the transmission rate of interface carriers is increased, the reaction overpotential is reduced, and the durability and cycling stability under high current density are enhanced; the invention provides an extensible and universal flexible preparation method which is suitable for a low-temperature-condition controllable synthesis process for constructing a two-dimensional MoS2 / MXene heterostructure in a large area.

The invention discloses a preparation method of a Sn-Bi-Ni-Cu quaternary liquid alloy methane cracking catalyst, production raw materials comprise composite melt metal and composite transition metal, and the mass ratio of the composite melt metal to the composite transition metal is 1: (0.3-1.2); the composite melt metal is composed of Sn and Bi according to the mass ratio of 1: (1.3-1.7); the composite transition metal is composed of Ni and Cu according to the mass ratio of 1: 0.15-1.2. The quaternary liquid alloy catalyst has the advantages that: 1) compared with the existing catalyst for hydrogen production by methane cracking, the quaternary liquid alloy catalyst provided by the invention can stably operate for more than 1000 hours in a range of normal pressure to 3MPa and air speed of 100-100mL. G <-1 >. H <-1 >, the active phase retention rate is more than 95%, and the quaternary liquid alloy catalyst is especially suitable for alkane pyrolysis hydrogen production, CO2 hydrogenation and easy carbon deposition reaction systems, and has a wide application prospect; a new material design thought and an engineering implementation scheme are provided for the field of liquid metal high-temperature catalysis; and 2) experiments show that the quaternary liquid alloy catalyst prepared by the method provided by the invention can significantly improve the carbon sequestration rate and the hydrogen yield.

The invention provides an oxyfluoride loaded nickel phosphide catalyst and application thereof. The carrier and the active phase of the oxyfluoride-loaded nickel phosphide catalyst are simultaneously prepared by adopting a'one-pot method '. The oxyfluoride-loaded nickel phosphide catalyst disclosed by the invention shows excellent reaction activity in hydrodechlorination reaction of fluorine-containing chlorohydrocarbon, and compared with a magnesium fluoride-loaded nickel phosphide catalyst obtained by a conventional impregnation method, the activity is obviously improved.

The invention discloses a vanadium catalyst for sulfuric acid production and a preparation and use method thereof, and belongs to the technical field of catalysts. A catalyst formula and a preparation process are improved, a silicate aid is added to generate crystal silicon dioxide to regulate and control the structure of a diatomite carrier, and a tabletting molding process is adopted to replace an extrusion molding process, so that the strength and stability of the catalyst are improved, the abrasion is reduced, and the pulverization resistance is improved; the additive is added to modulate the active phase of the catalyst, the activity stability is improved, and the requirements of modern sulfuric acid production can be met. The catalyst produced by the technical scheme is uniform in active component distribution and high in mechanical strength, the stability is improved, the production requirements of sulfuric acid manufacturers can be better met, the operation stability of a sulfuric acid production device is improved, and remarkable economic benefits and social benefits are achieved.

The invention discloses preparation and application of a yolk-shell structure body phase hydrodesulfurization catalyst based on hydrogen overflow, and the preparation method comprises the following steps: (1) adding nickel nitrate hexahydrate into an aqueous solution of glycerol, isopropanol and deionized water, and carrying out solvothermal reaction on a green solution to obtain a solid spherical nickel composite precursor; (2) mixing the nickel composite precursor with an ethanol solution of thioacetamide, and adding an ammonium heptamolybdate aqueous solution to obtain a turbid liquid; and performing solvothermal reaction on the turbid liquid to obtain the yolk-shell structure catalyst. The yolk-shell structure catalyst with rich NiMoS phases is controllably derived by adopting a limited range vulcanization coupling in-situ intercalation strategy. Under the action of confinement vulcanization, organic molecules are intercalated in situ and assist in constructing stable 1T-MoS2 with short plate length and low stacking, so that full exposure of rim sites is promoted. According to the catalyst, an inner core NiS2 is used as an auxiliary active phase to trigger a hydrogen overflow effect, and cooperation of double active phases is promoted through an egg yolk-shell structure, so that ultra-deep desulfurization of an oil product is realized.

The invention provides a loess-based hydrogen sulfide adsorbent, a preparation method thereof and application of the loess-based hydrogen sulfide adsorbent in removal of hydrogen sulfide in natural gas. Loess with a specific substance content is taken as a raw material, the material is prepared through pretreatment, modification activation and extrusion molding, and modification activation comprises alkali activation, graphene oxide crosslinking and copper and zinc loading. According to the invention, specific loess is combined with a targeted modification and activation process, so that the porosity and the specific surface area are effectively improved, and a new active phase is formed and endowed with adsorption and catalytic oxidation effects. The prepared adsorbent has the remarkable advantages of low cost, high sulfur capacity, long penetration time, excellent regeneration performance and the like. In a medium-low-temperature dry desulfurization scene, HS (the concentration is reduced to 0.1 ppm or below) in natural gas can be efficiently removed, and the device is particularly suitable for small and medium-sized natural gas purification devices in various process scenes such as a fixed bed and a moving bed, and can also be expanded to various fields such as coal chemical industry, petrochemical industry, biogas purification, environmental protection and the like.

The invention discloses a method for preparing guaiacol monomer products by catalyzing selective hydrogenolysis of lignin through aluminum oxide loaded nickel and nickel-tin alloy. The catalyst simultaneously containing metal nickel and nickel-tin alloy active phases is prepared by adopting a urea precipitation method, organic soluble lignin is taken as a raw material, a mixture of alcohol substances and water is taken as a solvent, and the aluminum oxide loaded metal nickel and nickel-tin alloy catalyst prepared by adopting the urea precipitation method is added; and replacing air in the reaction kettle with inert gas, pressurizing to 1.0-3.0 MPa, and stirring at 210-270 DEG C for 1-6 hours to convert the organic soluble lignin into a compound mainly comprising guaiacol monomer products with high selectivity. The catalyst is simple in preparation process and low in cost, the lignin depolymerization reaction has the advantages of mild conditions, safe operation process and the like, and the obtained guaiacol product can be used for preparing chemicals such as food additives or medical intermediates.

This invention discloses a method for extending the range of guided rockets using a single-chamber, dual-thrust design. By rationally designing the guided rocket's acceleration process after launch, this method effectively reduces energy loss during passage through dense atmosphere, improves the guided rocket's energy conversion efficiency, and ultimately, with a comparable charge, enables the guided rocket to achieve greater mechanical energy at the end of its active phase, thereby effectively increasing its range. A notable feature of this method is that the end of the guided rocket's active phase is located at a higher altitude, thereby achieving a better thermal environment in the active phase while simultaneously increasing its range.

The invention relates to a preparation method of a catalyst for efficiently decomposing high-humidity ozone, which comprises the following steps: (1) roasting and pretreating spherical aluminum oxide, soaking in a hydrochloric acid solution, washing with water and drying; (2) uniformly dispersing a manganese source and a copper source in an organic solvent to obtain a mixed solution, completely impregnating the hydrochloric acid modified spherical aluminum oxide in the step (1) in the mixed solution, and drying and calcining the impregnated spherical aluminum oxide catalyst to obtain a manganese-copper-based catalyst; and (3) uniformly dispersing a platinum source in pure water, completely dipping the manganese-copper-based catalyst in the step (2) in a platinum source solution, and drying and calcining the dipped catalyst again to obtain the high-moisture-resistance catalyst. The catalyst is prepared by adding the active components in two steps, so that the overall dispersity is improved to form a more ideal active phase, the dispersity of the active components manganese, copper and platinum is improved, the spatial distribution of active sites is controlled, side reactions are inhibited, and the catalyst is suitable for removing ozone in a high-humidity environment and has the characteristics of high humidity resistance and the like.

Catalyst particles containing one or more active metal components and methods for producing such catalyst particles are provided. The particles are composites of a granulating or binder material, such as an inorganic oxide, and an ultrastable Y (hereinafter "USY") zeolite in which some of the aluminum atoms in the framework are replaced with zirconium and / or titanium and / or hafnium atoms. The active phase component or components are incorporated into the post-framework modified USY zeolite by mixing the binder with the post-framework modified USY zeolite and extruding the resulting composite mixture to form the catalyst particles. The active phase component or components are incorporated into the post-framework modified USY zeolite before forming the catalyst particles.

The present invention relates to a nitrogen-doped carbon-wrapped nickel catalyst for synthesis of higher alcohols by assembly of bioethanol and a preparation method therefor. The preparation method includes the following steps: S1, subjecting a soluble nickel salt and polyacrylamide to stirring with water, completely dissolving and then drying to obtain a precursor, where a molar ratio of the soluble nickel salt to polyacrylamide is 1:(0.5-8); and S2, subjecting the precursor to pyrolysis in an inert atmosphere at 300° C.-800° C. for 1-6 hours to obtain the nitrogen-doped carbon-wrapped nickel catalyst. The catalyst prepared by the method of the present invention has an active phase with high dispersity which enables synthesis of higher alcohols by efficient assembly of small molecules, and has relatively high stability which can still maintain high conversion rate and high yield for organic phase after 10 times of repeated use.

The invention discloses a high-water-content material conveying system and method based on bionic and active separation, and belongs to the technical field of bulk material conveying. A self-adaptive super-smooth interface is constructed through a gradient porous ceramic matrix and electrowetting regulation and control, and the surface characteristics are dynamically regulated and controlled through voltage, so that the self-adaptive super-smooth interface adapts to the adhesion characteristics of different materials; water-solid efficient separation is achieved by combining ultrasonic cavitation and a centrifugal force field, through the active phase separation mechanism of first dissociation and then separation, the traditional mode of single mechanical extrusion or gravity drainage is changed, and the water-solid separation efficiency is improved to 95% from 70% or below; and magnetic suspension driving and piezoelectric energy harvesting are adopted, so that energy consumption is reduced. The system can achieve the breakthrough effects that adhesion tends to zero, separated water is directly recycled, and the power consumption per ton is smaller than 1 kWh, and is suitable for green conveying of industrial sludge, tailings and other scenes.

The invention discloses a nitrogen / sulfur co-doped porous carbon iron-based composite sodium ion battery negative electrode material and a preparation method thereof. According to the material, chitosan is taken as a carbon source, and the honeycomb-shaped composite carbon material with a hierarchical mesoporous structure is prepared by combining a sodium chloride template method and a two-step calcination process through a double-doping synergistic effect of cyanamine and ferric sulfate. FeS and Fe4 (Fe (CN) 6) 3 active phases are uniformly distributed in the material, FeS and Fe4 (Fe (CN) 6) 3 exist in a heterojunction form, nitrogen is doped in forms of pyridine nitrogen (more than or equal to 50%) and pyrrole nitrogen, and sulfur exists in forms of C-S-C bonds and sulfur oxides. The first efficiency of the material is greater than 90%, the reversible capacity under the current density of 1A / g reaches more than 450mAh / g, the capacity retention ratio after 1000 cycles is greater than or equal to 90%, and the reversible specific capacity under the high rate of 20A / g is still kept more than 150mAh / g. The preparation method comprises the steps of spray drying, two-step calcination and pickling pore-forming. The invention solves the problems of low capacity and poor cycling stability of the existing sodium-ion battery negative electrode material, and is suitable for high-power energy storage equipment.