520results about "Byproduct vaporization" patented technology

The invention relates to the field of sludge treatment, and particularly discloses a method for recycling phosphorus in sludge pyrolysis residues, a flocculant synthesis method and application. The invention discloses a method for recovering phosphorus in sludge pyrolysis residues. The method comprises the following steps: drying the sludge pyrolysis residues, grinding and sieving; the sludge pyrolysis residues are put into a hydrochloric acid solution to react, and solid-liquid separation is carried out after the reaction; treating the phosphorus-containing extracting solution through adsorption resin to obtain a phosphorus purification solution; adjusting the pH value of the phosphorus purification liquid to 9-11, and carrying out a crystallization reaction under the condition that the molar ratio of magnesium to nitrogen to phosphorus is (0.8-1.2): (1-1.6): 1 to obtain struvite; a synthetic method of the flocculating agent is as follows: the flocculating agent is prepared from residual sludge residues. The method for recycling phosphorus in the sludge pyrolysis residues has the advantages that phosphorus resources are recycled from the sludge pyrolysis residues, and the residues are secondarily utilized. The flocculating agent is applied to municipal sewage treatment.

The invention discloses a safe pyrolysis conversion and inorganic process for perfluorinated and polyfluorinated alkyl substances in sludge based on solid alkali in-situ catalysis, and belongs to the technical field of environmental protection. The process comprises the following steps: pretreating sludge to reduce the water content of the sludge to below 10%; mixing a solid base catalyst with the pretreated sludge, controlling the mass fraction of the solid base catalyst to be 0.1-10%, and ensuring full mixing by adopting a mechanical stirring or ball-milling mixing method; and putting the mixture into a pyrolysis reactor, and carrying out pyrolysis reaction for 0.05-4 hours in different regions in a temperature range of 300-1000 DEG C. The technological process is safe and controllable, and toxic by-products such as dioxin possibly generated by traditional high-temperature incineration are avoided. Compared with a traditional incineration method, the process has the advantages that the operation temperature is lower, and the energy consumption is lower. A solid-phase product is good in stability and meets the environmental safety requirement through a leaching toxicity test. The cooperation of sludge treatment and PFAS removal is realized, and the overall treatment efficiency is improved.

The invention discloses a method for drying sludge through microwave pyrolysis, which relates to the technical field of sludge treatment and comprises the following steps: step 1, reducing the water content of the sludge in a mechanical dehydration manner, and then screening out lumps; 2, extruding the sludge, and uniformly laying the sludge on a microwave material distribution belt; 3, the material distribution belt penetrates through a tunnel type microwave generator, and the sludge is heated and dried through microwaves; 4, the dried sludge is separated from the cloth belt, and the sludge is collected; wherein a tunnel type microwave generator adopted in the third step comprises a guide roller and a pressing roller, the guide roller makes contact with the lower surface of the cloth belt conveying part, so that the cloth belt forms an inclined section, and the pressing roller is located behind the guide roller and makes contact with the upper surface of the cloth belt conveying part, so that the cloth belt forms an arc-shaped section tightly attached to the guide roller. In the invention, the turning plate does not need to be contacted with the cloth belt, so that the condition that the surface of the conveying belt is scratched is avoided.

The invention discloses a method and treatment system for reducing and recycling biological sludge based on catalytic cracking reaction, and the method comprises the following steps: adding a diluent and a scale inhibitor into dewatered biological sludge in a sewage treatment plant to carry out thermal refining treatment, so that the biological sludge is converted from a solid state to a quasi solid state, and the biological sludge after thermal refining treatment is obtained; the biological sludge subjected to thermal refining treatment is conveyed into a catalytic cracking reactor through fluidization, an oxidizing agent is added for a catalytic cracking reaction, capillary water contained in the sludge, water adsorbed by sludge particles and water in the sludge particles are partially released into free-state moisture through a controllable oxidation process of the biological sludge, and the free-state moisture is discharged into a sludge drying device; converting the biological sludge into a liquid state from a quasi-solid state, and decomposing organic matters in the biological sludge into carboxylic acid mainly comprising C2-C6 to obtain a carboxylic acid mixed solution; according to the method, the carboxylic acid mixed solution is subjected to heat exchange and cooling treatment and then is subjected to solid-liquid separation to obtain solid residues and filtrate, so that the biological sludge is reduced, and meanwhile, the resource utilization of carbon elements is realized.

The present invention discloses an endothermic spreading device for pyrolyzing oil sludge by chain plate transmission, comprising: a segmented cavity, which is a stepped sealing structure with high and low dislocation, the inner wall of the cavity is covered with heat insulation cotton, a feeding port is arranged at the top of the upper section of the cavity, and a discharging port is arranged at the bottom of the lower section of the cavity; a multi-stage chain plate transmission mechanism, and multiple chain plates are respectively installed in the segmented cavity; a shunting baffle plate, which is arranged above the chain plate; a spiral mixing mechanism, which is arranged above the chain plate; a transfer turning roller, which is arranged at the material falling place at the intersection of adjacent two-stage chain plate transmissions; and a horizontal pushing and pulling plate mechanism, which is arranged above the chain plate. The device of the present invention is beneficial to improving the even covering property and mixing property of the oil sludge on the chain plate, increasing the specific surface area of the oil sludge, and optimizing the endothermic reaction conditions through the combined actions of spreading, mixing, turning, squeezing and vibrating the oil sludge transmitted by the chain plate, so as to enable the oil sludge to be pyrolyzed efficiently and sufficiently.

The invention relates to the field of water treatment, and particularly discloses a method for preparing a catalyst based on Fenton iron sludge and activated sludge, the prepared catalyst and application, the method comprises the following steps: S1, crushing and sieving Fenton iron sludge, activated sludge and a binder; s2, mixing the sieved Fenton iron mud, activated sludge and binder with a pore-forming agent and carbon powder, and then adding a transition metal salt solution to prepare a primary mixture; s3, the primary mixture is dried after being formed, a blank is formed and then subjected to pyrolysis treatment, and the catalyst is prepared; the invention also discloses the catalyst prepared by the method and application of the catalyst in water treatment. According to the application, resource utilization of the Fenton iron sludge and the activated sludge is realized, the problem of enrichment of organic matters and heavy metals in wastewater in a current Fenton iron sludge resource technology is solved, the prepared catalyst can be used for catalyzing ozone, hydrogen peroxide or persulfate to degrade the organic matters in the wastewater, and the preparation method of the catalyst is simple.

The invention discloses a method for preparing g-C3N4 / biochar with high photocatalytic activity through molten salt pyrolysis of sewage and sludge and application of the g-C3N4 / biochar, and belongs to the technical field of energy catalysis and environmental restoration. The method for preparing g-C3N4 / biochar from sewage sludge through molten salt pyrolysis comprises the following steps: drying the sewage sludge to obtain sludge powder; mixing the sludge powder with melamine to obtain a mixed material precursor, then mixing the mixed material precursor with a molten salt medium, and performing pyrolysis treatment to obtain the g-C3N4 / biochar. According to the invention, sewage sludge is used as a carbon source to compound biochar and g-C3N4, so that the specific surface area of the material can be increased, electron transfer is promoted, and the photocatalytic activity is improved. The prepared photocatalytic material is narrow in band gap width, large in visible light absorption range and excellent in photocatalytic activity, meanwhile, sewage sludge serves as a carbon source, and reasonable utilization of waste is achieved.

The invention discloses a sludge carbon loaded Schwertmannite immobilized iron-sulfur reducing bacteria composite material as well as a preparation method and application thereof. The method comprises the following steps: performing high-temperature pyrolysis on sludge to obtain sludge carbon; mixing the sludge carbon with a ferrous sulfate solution, then adding a hydrogen peroxide solution to carry out oxidation reaction, and carrying out solid-liquid separation to obtain a sludge carbon loaded Schwertmannite material; and adding the sludge carbon-loaded Schwertmannite material into a culture medium containing iron-sulfur reducing bacteria, carrying out bacterial culture until the culture medium is black, and carrying out solid-liquid separation to obtain the sludge carbon-loaded Schwertmannite material. The obtained mineral microorganism composite material is excellent in adsorption performance, large in adsorption capacity and high in stability, can efficiently remove heavy metal ions such as Sb (V), Cd (II) and Pb (II), and is particularly suitable for repairing heavy metal pollution in mining areas.

The invention discloses a high-effect sludge deep dehydration coupling resource utilization system and method, and relates to the technical field of sewage treatment.The method comprises the steps that special stirring equipment is adopted for stirring sludge, the stirred sludge is pretreated through ultrasonic waves and an advanced oxidation technology, and pretreated sludge is obtained; discharging free water and interstitial water from the pretreated sludge through an intelligent pressure maintaining and pressure relief regulation mechanism, then carrying out microwave-assisted heating by using a continuous low-temperature sludge drying machine, and adjusting microwave power and heating time to deeply remove bound water and interstitial water; carrying out pyrolysis carbonization on the sludge subjected to microwave-assisted heating through an indirect heating reaction furnace, and converting organic matters in the sludge into pyrolysis products; the sludge treatment efficiency and quality are remarkably improved through a series of innovative technologies, the special stirring equipment is combined with ultrasonic waves and the advanced oxidation technology, the physical and chemical properties of the sludge are optimized, and the energy consumption of the subsequent process is reduced.

The invention discloses a rotational flow pyrolysis device and method, activated sludge particles are blown into a rotational flow pyrolyzer through carrier gas nitrogen, the rotational flow pyrolyzer is heated through a pyrolyzing furnace, the pyrolyzing temperature is controlled to be 600-1000 DEG C, the pyrolyzing time is 1.5-2 h, the pyrolyzing time is 2-3 h, and the pyrolyzing time is 2-3 h; the gas inlet speed of nitrogen is adjusted, so that the sludge particles can keep suspended motion in the rotational flow pyrolyzer, and self-revolution-suspension recycling coupling pyrolysis of the particles is realized at the same time; after pyrolysis is completed, the flow rate of nitrogen is adjusted, and solid products, pyrolysis gas and tar are subjected to cyclone separation in the cyclone pyrolyzer and then discharged out of the cyclone pyrolyzer to be collected; according to the rotational flow pyrolysis device and method, sufficient and efficient pyrolysis of sludge particles can be achieved, the process energy consumption is low, and sludge activated carbon with high adsorbability and pure pyrolysis gas and tar can be obtained.

The invention discloses a sludge, bagasse and calcium oxide co-pyrolysis biochar as a soil additive, and a preparation method and application thereof, and belongs to the technical field of environmental restoration. Sludge biochar synergistically modified by bagasse and calcium oxide is used as a soil additive, calcium oxide is introduced for catalytic co-pyrolysis through the synergistic effect of bagasse and calcium oxide, and sludge-bagasse-calcium oxide biochar is prepared; the optimization effect of the sludge-bagasse-calcium oxide biochar in heavy metal contaminated soil remediation is evaluated through heavy metal occurrence form analysis, ecological risk assessment and soil remediation effect experiments. According to the sludge-bagasse-calcium oxide biochar prepared by the method, the fixing capacity of the biochar on heavy metals and the fixing efficiency of the heavy metals in soil are improved, and the physicochemical properties and fertility characteristics of the heavy metal contaminated soil are improved; the characteristics of the sludge-bagasse-calcium oxide biochar for well fixing heavy metals and improving soil properties are exerted, the ecological risk is reduced, the physicochemical properties and fertility characteristics of the soil are improved, and the application of a heavy metal contaminated soil remediation process is optimized.

The invention belongs to the technical field of heavy metal treatment, and particularly relates to a synthesis method and application of a sludge biochar Schwertmannite composite material capable of synchronously mineralizing cadmium and arsenic. Municipal or industrial sludge is used as a raw material, sludge biochar rich in Ca, Fe and alkaline functional groups is prepared through pyrolysis, then the sludge biochar is deeply compounded with Schwertmannite through a high-energy ball milling technology, a core-shell-like nested structure is formed through induction, and a large number of reaction sites are exposed. Under the condition that As / Cd coexists, the surface of the composite material can be induced to generate stable minerals, a synchronous precipitation mechanism is formed, and As and Cd have an adsorption synergistic enhancement effect. The process is wide in raw material source, clean and efficient in preparation process and free of high-temperature hydrothermal or organic reagents, has cation exchangeability, alkali energy storage and carbon immobilization value, provides a new theory and material support for long-term environment immobilization of multi-metal pollutants, and has large-scale application potential.

The invention relates to a heavy metal stabilizer and a preparation method and application thereof, and relates to the technical field of heavy metal stabilizers. The preparation method comprises the following steps: weighing sepiolite, adding hydrochloric acid, carrying out constant-temperature water bath, carrying out centrifugal separation to obtain a precipitate, drying the precipitate, and grinding to obtain the heavy metal stabilizer for sludge pyrolysis. Natural sepiolite is used as a base material, acid activation treatment is carried out through hydrochloric acid to obtain the heavy metal stabilizer, the heavy metal stabilizer is used in sludge pyrolysis, in the pyrolysis process, the heavy metal stabilizer fixes heavy metal in a pyrolysis product carbon in a stable form through the effects of surface adsorption, ion complexation, high-temperature packaging and the like, and the heavy metal stabilizer is used for sludge pyrolysis. Therefore, the emission of heavy metals in the pyrolysis process is reduced, and the ecological risk and the use risk of the pyrolysis product carbon are reduced.

The invention relates to the technical field of oil sludge resource regeneration, and discloses a water oil sludge resource regeneration device based on a composite ultrasonic field and application. The device comprises an oil sludge parameter acquisition module, a resonant frequency analysis module, a sound field coupling control module, a phase shift interference analysis module and a separation strengthening execution module. The oil sludge parameter acquisition module acquires a rheological characteristic data set of the oil-containing sludge in real time; the resonance frequency analysis module generates a dual-target resonance frequency parameter based on the data set; the sound field coupling control module drives the piezoelectric transducer array to generate a focused ultrasonic field, and a sound field coupling model is constructed; the phase shift interference analysis module corrects the phase offset of the model and outputs a multi-band sound energy injection sequence; and the separation strengthening execution module regulates and controls the rotating speed gradient of the mechanical centrifugal unit, triggers membrane stack pulse backwashing, and finally generates regenerated base oil and a purified water phase product. According to the device, efficient regeneration of water-oil sludge resources is realized through cooperation of multiple modules.

The invention belongs to the technical field of sludge treatment, and discloses a desulfurization wastewater sludge treatment system which comprises a base, a clarification assembly; an isolation component; a pyrolysis assembly; a crushing assembly; a storage assembly and a filter assembly. Oil and water can be accumulated in the round shell from bottom to top, water can gradually move towards the bottom layer of liquid, oil can move downwards, the oil and the water can continuously penetrate between the coarse filter element and the fine filter element on the lower layer to be filtered twice, and finally the state that the oil is above the whole liquid level and the water is below the whole liquid level is achieved. The top blocking net is formed by longitudinally stacking a plurality of wave-shaped metal plates, a plurality of wave-shaped bent channels are formed, water is subjected to rising resistance at the position, water drops are difficult to adhere to the smooth metal plates, the conditions that the water rises rapidly on the liquid level, the water is squeezed to the position and is discharged accidentally are prevented, and the problems that an existing sludge dewatering machine is inconvenient to use and the like are solved. The problems that only water in sludge is separated out through one-time circulation work, and impurities in sewage cannot be further filtered and distinguished are solved.

The utility model relates to the technical field of waste treatment, and provides a sludge synergy general industrial solid waste pyrolysis gasification comprehensive system, which comprises a support frame, a furnace body, an inner wall fixedly embedded in the support frame and close to the top, a filter plate fixedly embedded in the inner wall of the furnace body and close to the bottom, and a gas inlet pipe fixedly embedded in the inner wall of the furnace body and communicated with the filter plate. And a three-legged mounting frame is fixedly embedded in the inner wall, close to the top, of the furnace body. By starting the motor, the output shaft of the motor drives the first rotating rod to rotate and synchronously drives the first bevel gear to rotate, then under the interaction of the first bevel gear and the second bevel gear, the second rotating rod can be driven to rotate, the stirring rod is synchronously driven to rotate, sludge and garbage are stirred, and the sludge and the garbage are fully combusted; and the inner wall of the furnace body is scraped through the scraping plate, dirt adhering to the inner wall of the furnace body is scraped away, soot generated by sufficient combustion falls down through the filtering plate, in this way, the stirring effect of sludge and garbage can be improved, and the combustion effect of the sludge and the garbage is improved.

The invention relates to a calcium-based difunctional composite material and a preparation method and application thereof, the calcium-based difunctional composite material is applied to pollution control in a sludge-low-rank coal co-pyrolysis process, the calcium-based difunctional composite material is composed of Ca2Fe2O5 and an adsorptive material, and the mass ratio of Ca2Fe2O5 to the adsorptive material is 1: 1. According to the calcium-based bifunctional composite material, the fixation rate of sulfur in pyrolytic carbon is remarkably increased, conversion of heavy metal to a more stable form is facilitated, and the leaching capacity and potential ecological risks of the heavy metal are remarkably reduced.

The invention belongs to the technical field of biochar preparation, water treatment and new materials, and discloses a composite material for sulfonamide antibiotic treatment, a preparation method and application, and the preparation method comprises the following steps: preparing sludge biochar SBC; mnO2 coated OSBC is prepared; aminated PCA is prepared; pCA-MnO2 (at) OSBC is prepared; the preparation method comprises the following steps: cutting absorbent cotton, ultrasonically cleaning with deionized water, drying, dispersing PCA-MnO2 coated OSBC into a polyvinyl alcohol PVA solution, dipping the absorbent cotton, dropwise adding glutaraldehyde for crosslinking, curing, dipping into a PCA-MnO2 coated OSBC suspension, and carrying out freeze-drying heat treatment. The composite material disclosed by the invention has relatively stable physical properties and chemical properties, can be efficiently separated from an aqueous solution and recycled after being degraded, and can achieve a relatively good degradation effect in various typical real water bodies.

The invention provides a method and a system for strengthening sludge treatment and nanometer material co-production through synergy of electrochemistry and ozone catalysis, and application of the method and the system, and relates to the technical field of environmental governance and resource recovery, in particular to the method for strengthening sludge treatment and nanometer material co-production through synergy of electrochemistry and ozone catalysis. Comprising the following steps: (a) performing electrochemical catalytic oxidation treatment on sludge slurry; (b) pyrolyzing the sludge treated in the step (a) to obtain volatile components; and (c) converting the volatile component into nano silicon dioxide through a vapor deposition reaction. According to the electrochemical-ozone catalysis synergistic enhanced sludge treatment and nano material co-production method provided by the invention, electrochemical catalytic oxidation, pyrolysis and vapor deposition processes are organically integrated, so that efficient removal of pollutants in sludge and synchronous conversion of high-value nano materials are realized.

The invention discloses a method for preparing CNTs and hydrogen-rich gas through sludge pyrolysis, sludge is subjected to pyrolysis after being conditioned by ferric salt, pyrolysis gas is collected and reduced under the action of a Ni-Fe / NF catalyst, the Ni-Fe / NF catalyst is prepared and obtained, and the Ni-Fe / NF catalyst is obtained by dipping foamed nickel in a mixed solution containing nickel nitrate and ferric nitrate and reducing the foamed nickel. Under the action of the Ni-Fe / NF catalyst, on the basis of not changing pyrolysis conditions and not influencing preparation of pyrolytic carbon and pyrolytic oil by sludge pyrolysis, the pyrolysis gas is synchronously converted into the Ni-Fe / NF catalyst with higher value, so that the economic values of the sludge and the pyrolysis gas are improved, the influence on the environment is reduced, and the engineering application of the sludge pyrolysis technology is favorably realized.

The invention relates to the technical field of adsorption materials, in particular to a preparation method and application of iron-crosslinked sodium alginate modified bagasse biochar, which comprises the following steps: respectively pretreating red mud and bagasse, and then mixing the pretreated product with melamine to obtain a mixed material; the mixed material is placed in a protective atmosphere for pyrolysis treatment, and modified bagasse biochar is obtained; mixing the modified bagasse charcoal with a sodium alginate solution, performing ultrasonic treatment, heating and stirring to obtain a blended solution; the preparation method comprises the following steps: mixing bagasse and sodium alginate in a mixed solution, dropwise adding the mixed solution into a ferric chloride solution for standing and cross-linking, and carrying out washing treatment, freeze drying and grinding to obtain sodium alginate modified bagasse biochar, the method adopts bagasse as a biochar raw material, and introduces a magnetic material, a nitrogen-containing substance and sodium alginate to modify the biochar function; the surface active sites of the prepared material are increased, the adsorption capacity on tetracycline hydrochloride is improved, and the resource high-value utilization of the red mud and bagasse solid waste is realized.

The invention relates to the technical field of environmental protection and resource regeneration, and discloses a process for preparing biochar with high adsorption performance by acid pretreatment and carbonization treatment of coked sludge, the coked sludge is subjected to acid soaking pretreatment, and then hydrothermal carbon is prepared by a carbonization process; the pretreated liquid phase is recycled for three times to obtain iron-rich acid liquid, and diluted hydrochloric acid and ferric trichloride products are obtained at the same time through separation by an evaporation and concentration process. On one hand, inorganic mineral components in the coking sludge are effectively removed, and the internal pore structure of the sludge is dredged and improved, so that the hydrothermal carbon with excellent adsorption performance is prepared; on the other hand, most of heavy metals in the coking sludge are also removed through acid pretreatment, the environmental risk of biochar is also reduced synchronously, and the treatment process of the technical scheme provides a new thought for harmless treatment and resource utilization of hazardous waste; the method is of great significance to acceleration of construction of a waste recycling system and high-quality green development.

The invention provides a sludge-based iron-based catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts and sewage treatment. The preparation method of the sludge-based iron-based catalyst comprises the following steps: respectively drying, crushing and sieving Fenton iron sludge and biochemical sludge to obtain a Fenton iron sludge dry material and a biochemical sludge dry material; and mixing the dry Fenton iron sludge material and the dry biochemical sludge material, and then performing pyrolysis under an anaerobic condition to obtain the sludge-based iron-based catalyst. The preparation method is simple, no chemical agent is used, the raw material is waste mud, and the purpose of treating waste with waste is achieved. The prepared catalyst can be used for efficiently degrading landfill leachate MBR effluent.

The utility model discloses an oily sludge integrated pyrolysis treatment system which comprises a pyrolysis outer furnace and a pyrolysis inner furnace fixedly arranged in the pyrolysis outer furnace, a bottom bracket is fixedly arranged at the bottom of the inner wall of the pyrolysis outer furnace, and a heating mechanism is fixedly mounted on the bottom bracket; the top end of the pyrolysis outer furnace is fixedly provided with a stirring mechanism for fully heating the oily sludge, one side of the top end of the pyrolysis inner furnace is fixedly communicated with a pyrolysis gas guide pipe, and one end of the pyrolysis gas guide pipe is fixedly provided with a purifier. According to the integrated pyrolysis treatment system for the oily sludge, the improved heating mechanism is adopted, pyrolysis gas generated by pyrolysis is directly guided into the spray combustion assembly to be directly combusted together with liquefied gas, on one hand, the use amount of the liquefied gas in the pyrolysis process can be reduced, more energy is saved, on the other hand, the pyrolysis gas does not need to be condensed and recycled, and the cost is reduced. And the complexity and difficulty of the pyrolysis process are reduced, the safety is higher, and more energy-saving and environment-friendly effects are achieved.

The invention provides iron-manganese composite oxide modified biochar (FM-SBC) as well as a preparation method and application thereof, and relates to the technical field of modified biochar. The method comprises the following steps: drying, grinding, modifying, drying and pyrolyzing excess sludge of a secondary sedimentation tank of an urban sewage treatment plant, and modifying the excess sludge by using an iron-manganese composite oxide to obtain the iron-manganese composite oxide modified biochar. The iron-manganese composite oxide modified biochar can be used as an efficient catalyst of persulfate (PS), provides technical support for treatment of refractory organic wastewater by enhancing the catalytic effect and enhancing efficient degradation of refractory organic pollutants such as azo dyes, and is of great significance to sustainable development of the environment.

The invention belongs to the technical field of environmental functional materials, and discloses a sludge-based catalytic material as well as a preparation method and application thereof. The preparation method of the sludge-based catalytic material comprises the following steps: drying sludge to obtain sludge particles; mixing the sludge particles, EDTA (Ethylene Diamine Tetraacetic Acid), citric acid and water, and reacting to obtain modified sludge particles; mixing the modified sludge with a phosphomolybdic acid solution, and performing pyrolysis to obtain the sludge-based catalytic material. According to the invention, the EDTA and the citric acid are adopted to modify the sludge, metals in the sludge are distributed on the surface of the material in the subsequent pyrolysis process, and the citric acid also has a pore-forming effect to increase the specific surface area of the material and improve the adsorption capacity to pollutants; the sludge is modified by adopting phosphomolybdic acid, and abundant oxygen-containing functional groups are introduced to the surface of sludge carbon, so that the adsorption capacity and the catalytic degradation capacity of the sludge-based catalytic material are improved, and the sludge-based catalytic material has good catalytic performance.

The invention provides a method for preparing phosphorus-rich biochar through sludge pyrolysis-calcination two-step heat treatment, and belongs to the technical field of harmless treatment and resource utilization of municipal sludge. The preparation method comprises the following steps: (1) heating and drying municipal sludge, grinding, crushing and sieving to obtain sludge particles; (2) pyrolyzing the sludge particles in the step (1) in a microwave pyrolysis device, and cooling to obtain sludge semicoke; and heating and calcining the sludge semicoke in the step (2) in a nitrogen or carbon dioxide atmosphere, and cooling to obtain the phosphorus-rich biochar. Compared with commercial activated carbon, the phosphorus-rich biochar prepared by the method disclosed by the invention is rich in a large amount of phosphorus element, the source is more environment-friendly, and the harm caused by mass production and accumulation of municipal sludge is solved; the phosphorus-rich biochar disclosed by the invention is more practical, can be applied to grassland gardens instead of phosphate fertilizer, or can be mined as a phosphate ore source instead of phosphate ore.

The invention discloses a pyrolysis carbonization treatment system for sludge and a carbonization treatment method thereof. The pyrolysis carbonization treatment system comprises a sludge pretreatment device, a multi-section carbonization furnace and a tail gas treatment device which are communicated in sequence, the sludge pretreatment device comprises a plate-and-frame filter press and a paddle dryer which are connected with each other; a combustion-supporting device for receiving drying tail gas and supporting combustion for the multi-section carbonization furnace is arranged at the top of the paddle dryer; the multi-section carbonization furnace comprises a drying layer, a carbonization layer and an activation layer which are communicated from top to bottom, and a steam injector for injecting steam into the activation layer and a combustor for secondarily heating the activation layer are mounted on the outer wall of the multi-section carbonization furnace; compared with the prior art, the separation between the drying tail gas and the sludge is realized through the paddle dryer, the generated drying tail gas is supplied to the multi-section carbonization furnace for combustion under the action of the combustion-supporting device, and the anoxic combustion in the multi-section carbonization furnace is realized under the action of limited sludge gas, so that the carbonization requirement of the sludge in the multi-section carbonization furnace is met; and the sludge in the multi-section carbonization furnace is pyrolyzed, carbonized and activated.

A sludge dehydration and drying device and method, belonging to the technical field of sludge treatment, wherein the device comprises a heating pre-dehydration chamber and upper and lower filter cloths and a high-pressure dehydration assembly, the upper and lower filter cloths pass through the sludge conveying channel formed by the heating pre-dehydration chamber, the upper and lower filter cloths are fed and collected along the channel, the heating pre-dehydration chamber is provided with a feed port for inputting sludge, the outer sides of the upper and lower filter cloths are provided with sliding rollers, the heating pre-dehydration chamber is provided with a flue gas inlet to heat and condition the sludge in the filter cloth interlayer online to achieve heating pre-dehydration, one end of the heating pre-dehydration chamber is provided with a high-pressure dehydration assembly, the high-pressure dehydration assembly comprises a high-pressure dehydration tank and a matching hydraulic cylinder, the high-pressure dehydration tank is provided with a circulating cloth mechanism to reciprocately fold the interlayer filter cloth in the high-pressure dehydration tank, and the hydraulic cylinder presses the multi-layer filter cloth for high-pressure dehydration. The present invention realizes deep drying and dehydration, and finally obtains a sludge moisture content of <10%, and has the advantages of high dehydration efficiency, low operating cost, strong practicality, etc.

The invention discloses multi-walled carbon nanotube functionalized sludge biochar as well as a preparation method and application thereof. The method comprises the following steps: firstly, mixing sludge biochar prepared by anaerobic pyrolysis with a multi-walled carbon nanotube, and carrying out ball milling treatment, so as to prepare the sludge biochar functionalized by the multi-walled carbon nanotube; the multi-walled carbon nanotube functionalized sludge biochar prepared by the invention can efficiently activate peroxymonosulfate to degrade trace antibiotics in a water body, and the removal rate of sulfamethoxazole can reach 96% when the reaction is carried out for 60 minutes. According to the method, harmless treatment and resource utilization of the sludge can be realized, and meanwhile, efficient removal of antibiotics in the water body is also realized.