552 results about "Charring" patented technology

The invention discloses a preparation method for preparing a biomass porous carbon material through high-temperature carbonization of molten salt and application of the biomass porous carbon material, and belongs to the technical field of synthesis of inorganic functional materials. According to the technical scheme, the method is characterized in that sodium chloride and potassium chloride are mixed into mixed salt according to different proportions, then the mixed salt is mixed with enteromorpha biomass according to a certain proportion, the mixture is placed in a porcelain crucible, the mixed salt is added for covering, the porcelain crucible is placed in a muffle furnace to be heated and carbonized, and the porous biomass carbon material is obtained after water washing and drying. The enteromorpha biomass is selected as the raw material, the operation is simple and controllable, the cost is low, batch production can be realized, and the prepared novel porous biomass carbon material has a complex porous structure, a large specific surface area, a very good catalytic effect, strong adsorption capacity and good conductivity, and shows excellent performance when being applied to the field of advanced oxidation.

The invention discloses a superconducting carbon black co-production method based on directional refining of catalytic slurry oil and a product thereof, and belongs to the technical field of carbon black preparation, and the method comprises the following steps: mixing the catalytic slurry oil and catalytic circulating oil to obtain mixed slurry oil, and adding a deliming agent for settling separation to obtain purified slurry oil; carrying out continuous solvent extraction on the obtained purified oil slurry to respectively obtain an aromatic component and a heavy component; carrying out thermal polycondensation reaction on the obtained aromatic component in a magnetic field environment in the presence of a catalyst and a cross-linking agent, and then carrying out supercritical fluid extraction to obtain spinnable mesophase pitch; carrying out slurry reactor hydrogenation deconstruction on the obtained heavy component to obtain stable micromolecular carbon black raw oil, mixing the carbon black raw oil with a nitrogen source and a template precursor, carbonizing, and carrying out acid pickling to obtain the superconducting carbon black; through a heavy oil slurry reactor hydrogenation deconstruction'doping-template 'synergistic carbonization strategy, the superconductive carbon black with nitrogen / phosphorus co-doped and developed hierarchical porous structure is constructed in situ by a one-step method.

The invention belongs to the technical field of underground hydrogen storage, and particularly relates to a method for improving underground hydrogen storage capacity by stabilizing hydrogen foam through a porous carbon material, which comprises the following steps: step 1, preparing a hydrophobic modified porous carbon material: preparing the porous carbon material by using biomass waste as a raw material through a carbonization-activation process; carrying out hydrophobic modification treatment on the porous carbon material to enable the water contact angle of the material to reach more than 90 degrees; step 2, preparing a surfactant solution; step 3, preparing a porous carbon-surfactant composite system; and fourthly, hydrogen foam is generated and injected, wherein hydrogen and the porous carbon-surfactant composite system are fully mixed according to the gas-liquid volume ratio of 1: 1-10: 1, and then the mixture is injected into the stratum. By means of the method, the stability of hydrogen foam can be remarkably improved, the hydrogen storage efficiency and the hydrogen recovery rate are improved, and therefore the underground hydrogen storage amount is greatly increased.

The invention provides a preparation method for preparing porous carbon based on an aerogel method, the porous carbon and application of the porous carbon, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: mixing polyhydroxy phenol, aromatic aldehyde, acrylamide, graphene oxide and lithium salt according to a mass ratio of 100: (50-200): (5-30): (1-5): (1-5), carrying out hydrothermal reaction at 100-200 DEG C for 1-6 hours, and freeze-drying at-40 DEG C to obtain a hydrogel precursor; and carbonizing the precursor in organic heteroatom gas at 500-800 DEG C, mixing the intermediate with alkali according to the ratio of 100: (100-500), activating at 900-1100 DEG C, pickling and drying to obtain the porous carbon. The conductivity of the product is improved by means of graphene, lithium salt and heteroatoms, and the aerogel method obtains large aperture, has the characteristics of low impedance, high first efficiency and small charge-discharge expansion, and can be efficiently applied to silicon-carbon materials.

The preparation method comprises the following steps: shredding a light fibrous plant raw material which is difficult to process to 1-5mm, adding a certain amount of lignin, fully mixing with diammonium hydrogen phosphate or ammonium dihydrogen phosphate, carrying out hot press molding at 130-190 DEG C by using a pelletizer to prepare heavy particles with the particle size of 8-10mm, and carrying out high-temperature sintering to obtain the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material, thereby obtaining the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material and the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material. Heating the heavy particles to 400-700 DEG C in a rotary furnace, carbonizing for 1-3 hours, introducing a mixed gas of water vapor and air, and carrying out segmented activation at 850-950 DEG C-1000 DEG C to prepare high-quality activated carbon with the iodine value of more than or equal to 950 mg / g; crushing activated carbon to 140-325 meshes, mixing the crushed activated carbon with the composite glue solution, adding a proper amount of water for kneading, and forming the mixture into 2-8mm columnar particles by a hydraulic granulator or a screw extrusion granulator; through drying at the temperature of 100-300 DEG C and heat treatment at the temperature of 700-900 DEG C in a nitrogen, water vapor or anaerobic atmosphere, a basic group generated by the binder in the heat treatment has a very strong chemical adsorption effect on acid gas, later-stage modification is not needed, and excellent desulfurization and denitrification performance is achieved.

The invention belongs to the technical field of high polymer materials, and particularly discloses a lignin-based charring agent containing silicon and nitrogen flame-retardant elements and an imine structure for flame-retardant polylactic acid and a preparation method of the lignin-based charring agent. The flame-retardant polylactic acid is prepared from the following components in parts by weight: 90 to 97 parts of polylactic acid, 1 to 3.33 parts of lignin-based charring agent and 2 to 6.67 parts of ammonium polyphosphate. The bio-based charring agent disclosed by the invention contains silicon and nitrogen flame-retardant elements and an imine structure, has remarkable charring and flame-retardant effects, is high in charring capacity, and can endow the PLA with relatively good flame-retardant property by compounding with ammonium polyphosphate and adding 1% of the lignin-based charring agent; the lignin and vanillin which are used as main raw materials for synthesizing the charring agent are bio-based sources and are easy to obtain, the production process is simple, industrial production is easy, the preparation process is non-toxic and environment-friendly, the dependence of charring agent synthesis on petroleum-based raw materials can be effectively relieved, and the sustainable development trend of materials is met.

The invention relates to a double-circulation symmetrical airflow type straw flash carbonization device which comprises a feeding mechanism, a conveying mechanism, a rotary carbonization furnace, a carbonization separator, a carbon outlet separator, a pyrolysis gas channel, a combustion furnace and a combustion separator, the rotary carbonization furnace is of a double-layer jacket type structure, and the design of an outer-layer high-temperature heating inner wall and an inner-layer tangential rotational flow inner cavity is adopted; the raw materials form a thin layer under the action of centrifugal force to finish flash carbonization. According to the invention, the combustion furnace and the rotary carbonization furnace which are symmetrically arranged, and the carbonization separator and the combustion separator are adopted, so that cyclic re-carbonization and graded collection of carbonized products, split-flow utilization of pyrolysis gas and stepped recovery of high-temperature flue gas are realized; the problems that a traditional device is low in continuous degree, high in energy consumption and insufficient in product purity are solved, and the straw carbonization efficiency and the resource utilization rate are remarkably improved.

The invention discloses a flexible intumescent fireproof coating and a preparation method and application thereof, and relates to the technical field of coatings, the flexible intumescent fireproof coating comprises the following components by weight: 30-60 parts of organosilicon modified epoxy resin, 15-30 parts of a flame retardant, 5-15 parts of a charring agent, 10-20 parts of a foaming agent, 5-20 parts of a flame retardant toughening agent, 5-10 parts of a fireproof filler, and 5-15 parts of a diluent. 2-5 parts of a defoaming agent, 1-5 parts of a dispersing agent and 30-50 parts of a curing agent. Through the synergistic effect of the organic silicon modified epoxy resin and the specific flame-retardant toughening agent and in combination with a compound system of silane modified ammonium polyphosphate and the triazine charring agent, the fireproof and heat-insulating properties and flexibility of the coating are greatly improved, and the application of the coating on different matrix structures is expanded; the dual requirements on fireproof performance and flexibility in the fields of aerospace, power batteries and the like are met.

The invention discloses a production process of activated carbon with efficient adsorption performance, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: by taking biomass as a raw material, compounding the biomass with a eutectic salt system consisting of zinc chloride and potassium chloride, a nitrogen source precursor and a sacrificial cation source to obtain a homogeneous reaction precursor; the key point is that the precursor is subjected to programmed variable-pressure pyrolysis treatment under the condition that the temperature is far lower than the traditional activation temperature. According to the process, deep infiltration of molten salt is achieved through initial pressurization operation, and then reaction gas is guided to escape orderly through a later programmed pressure reduction process. Through collaborative innovation of the composition and the process, multiple steps of carbonization, activation, pore forming, in-situ functionalization and the like are integrated in a single low-temperature reaction unit, and the technical problems that a traditional method is high in energy consumption and long in flow, and the physical structure and surface chemistry of a material are difficult to synchronously regulate and control are solved.

The invention belongs to the technical field of high polymer materials, and discloses a bio-based spiral macromolecular flame retardant as well as a preparation method and application thereof. The novel bio-based spiral macromolecular flame retardant PDVPA is successfully prepared on the basis of common industrial raw materials in combination with bio-based renewable vanillin, and the novel bio-based spiral macromolecular flame retardant PDVPA is applied to preparation of a flame-retardant TPEE composite material by adopting a melt blending process. The phosphorus element in the PDVPA molecular structure is used as a main flame-retardant functional group, and can promote the charring of the spiral structure of the PDVPA molecular structure; meanwhile, an imine bond can be subjected to a trimerization reaction under a high-temperature condition to form a cross-linked network structure, so that the molten drop phenomenon during TPEE combustion is effectively inhibited. The invention provides a new way for improving the safety performance of the high polymer material and reducing the dependence on fossil resources.

The invention relates to the technical field of modified carbon graphite materials, and particularly discloses an antioxidant modified carbon graphite material and a preparation method thereof, the antioxidant modified carbon graphite material comprises the following raw materials by weight: 30-34 parts of medium temperature pitch, 4-6 parts of modified silica sol and 10-12 parts of artificial graphite powder; from two aspects, firstly, the aluminum dihydrogen phosphate and the boric acid aqueous solution are added, the aluminum dihydrogen phosphate can promote the asphalt to form a denser and firmer glassy carbon structure during carbonization, and phosphorus pentoxide generated by decomposition of the aluminum dihydrogen phosphate and boron oxide generated by dehydration of boric acid can generate a glass phase with an anti-oxidation effect; secondly, core-shell particles are added, a shell layer of the core-shell structure is an aluminum hydroxide structure generated by hydrolyzing aluminum nitrate nonahydrate, and an inner core is epoxidized nano silicon carbide; through the synergistic effect of the two, the mechanical property and the oxidation resistance of the carbon-graphite material are improved.

This invention discloses a method for preparing spinnable mesophase pitch. The method includes: (1) distilling catalytic oil slurry under reduced pressure at a separation temperature of 365-380℃ to separate light distillate and heavy distillate; (2) hydrogenating the light distillate from step (1), and fractionating the hydrogenated product to obtain hydrogenated light distillate II; (3) countercurrently contacting the heavy distillate from step (1) with an extraction solvent, thereby extracting the heavy distillate under supercritical conditions to obtain an extractant; (4) co-carbonizing the extractant from step (3) with the hydrogenated light distillate II from step (2) under an inert atmosphere and with a co-carbonizing agent to obtain mesophase pitch. This invention allows for more precise control of the utilization of catalytic oil slurry raw materials, improves the raw material utilization rate, and increases the yield and broad-spectrum mesophase pitch content of spinnable mesophase pitch.

The invention relates to the technical field of composite materials, in particular to a silicone rubber composition and a preparation method thereof. The silicone rubber composition is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber, 25-35 parts of white carbon black, 2.8-3.0 parts of hydroxyl silicone oil, 1.1-1.2 parts of hydrogen-containing silicone oil, 0.8-1 part of a cross-linking agent, 20-30 parts of an additive A, 6-8 parts of an additive B and 1.5 parts of a silane coupling agent KH-550. The additive in the additive A is carbonized and forms an intumescent flame-retardant system in the reaction under the combined action of mannitol and bamboo fiber, and generates a flame-retardant gas during decomposition, so that the fire resistance and flame retardance of the silicone rubber composition can be effectively improved, and meanwhile, the additive B is capable of effectively improving the flame retardance of the silicone rubber composition based on the loading of blumea oil and chitosan quaternary ammonium salt. The blumea oil endows the material with an anti-aging function through the good anti-oxidation characteristic, so that the thermal stability and durability of the silicone rubber composition are effectively improved under the combined action of the additives.

The invention belongs to the technical field of high-value utilization of waste plastic resources and preparation of carbon materials, and relates to a system for preparing a carbon material with a controllable specific surface area through continuous carbonization-activation of waste plastics. The system comprises a crushing and drying function unit, a spiral continuous transportation function unit, a carbonization / activation pyrolysis function unit, a KOH precise mixing function unit and a washing and metering function unit, wherein a KOH moisture absorption path is blocked in a nitrogen atmosphere, and directional evolution of a carbon hole structure is realized through segmented temperature control; the material uniform drying and mixing mechanism cooperates with the stirring device to guarantee the matching precision of KOH and pyrolytic carbon; centrifugal separation, a gas storage tank and a compressor are coupled to complete purification and recovery of pyrolysis gas, the pickling and washing module realizes dealkalization of products, and the metering and collecting unit supports a closed loop of a production line. Compared with the prior art, the system disclosed by the invention breaks through the stability defect of an intermittent process, can be used for preparing the porous carbon material with the specific surface area of 600-2000m / g, and provides core equipment support for industrial landing of high-value recycling of waste plastics.

The invention belongs to the technical field of drinking water purification materials, and discloses a drinking water difunctional filtering carbon material which is capable of efficiently removing heavy metals, high in mineral substance retention rate and high in safety, and a preparation method and application of the drinking water difunctional filtering carbon material. The preparation method comprises the following steps: (1) mixing a primary carbonized material, a binder, a pore forming agent and a transition metal salt solution, kneading and forming, and drying to obtain a green body; (2) sequentially carrying out secondary carbonization treatment and thermal activation treatment on the green body, cooling, washing with water until the conductivity of a washing solution is constant, and drying to obtain a porous carrier; (3) immersing the porous carrier in the oxidation modification solution, carrying out solid-liquid separation, washing with water, and drying to obtain a porous oxidation carrier; and (4) immersing the hot porous oxidation carrier in the alkaline polyamine modified solution, adjusting the pH value of the mixture to be close to neutral when the temperature is reduced to room temperature, carrying out solid-liquid separation, and carrying out heat treatment to obtain the drinking water dual-function filtering carbon material, wherein the temperature of the porous oxidation carrier is higher than that of the alkaline polyamine modified solution.

The invention relates to the technical field of coatings, discloses a multifunctional fireproof and waterproof polysiloxane coating and a preparation method thereof, and aims at solving the problems that the hydrophobic function of an existing fireproof and waterproof polysiloxane coating is irreversibly lost after a fire disaster, and the fireproof and waterproof synergistic performance is remarkably attenuated in a medium-high-temperature environment. Hydroxyl-terminated methyl phenyl siloxane is used as matrix resin, and is matched with a flame-retardant system composed of melamine modified ammonium polyphosphate, pentaerythritol and amino modified nano-montmorillonite, a hydrophobic repair system composed of polysiloxane capsule wall fluorosilane microcapsules, an interface modifier compounded by an epoxy group and an amino silane coupling agent, and a special auxiliary agent. A three-dimensional covalent network is constructed to anchor all the components, efficient charring and temperature response type hydrophobic repair are achieved, the finished product is prepared through microcapsule preparation, modified flame retardant compounding and coating main body blending, and the finished product has excellent fireproof and waterproof performance, a renewable hydrophobic function after a fire disaster and stable performance at medium and high temperatures and is suitable for industrial long-term protection scenes.

The invention discloses a method for preparing desulfurized biochar from kitchen waste anaerobic fermentation biogas residues, and belongs to the technical field of biochar preparation, the key point of the technical scheme is that the method for preparing desulfurized biochar from kitchen waste anaerobic fermentation biogas residues comprises the following steps: S1, drying and crushing biogas residues to obtain biogas residue powder; s2, adding the biogas residue powder into a metal solution, performing ultrasonic dispersion, dropwise adding a precipitant to enable the pH to be 8.5-9.5, reacting at a certain temperature, aging, performing suction filtration, and drying to obtain modified biogas residue powder; s3, carbonizing the modified biogas residue powder to obtain desulfurized biochar, and introducing metal into the biogas residue powder to improve the adsorption rate of the biochar to sulfur dioxide.

The invention relates to the technical field of carbon material preparation, in particular to phenolic resin-based porous carbon and a preparation method thereof. The core of the preparation method of the phenolic resin-based porous carbon is that the mass ratio of phenolic aldehyde to phenolic aldehyde is optimized (1: (1-1.2)) to ensure sufficient crosslinking, and an amine catalyst is selected to reduce metal residues; meanwhile, terephthalaldehyde is introduced as a cross-linking accelerant, so that the bridging density and thermal stability of a resin network are effectively enhanced, and structural collapse is inhibited in subsequent carbonization; a sectional type carbonization process is further adopted, and the carbon skeleton is preserved by controlling the heating rate. According to the method, the carbonization yield is finally and successfully improved to 58% or above (improved by 15%-20% compared with that of a traditional method), the ash content is remarkably reduced (smaller than or equal to 0.2%), and an excellent material with a small mesoporous structure (the average pore diameter ranges from 2 nm to 10 nm) and a high specific surface area (larger than or equal to 1500 m < 2 > / g) is obtained.

The utility model discloses an automatic flame-spraying high-temperature plastic-removing burning cleaning furnace which is used for carrying out high-temperature plastic-removing on a spraying hook hung on a hanging chain line, the running path of the hanging chain line passes through the burning cleaning furnace, and the burning cleaning furnace comprises a flame-spraying end part and a flame-blocking end part which are arranged on the two opposite sides of the running path of the hanging chain line. The flame spraying end component is provided with flame spraying torches distributed along the running path of the suspension chain line, the flame blocking end component can be opened and closed relative to the flame spraying end component when being operated, the flame blocking end component and the flame spraying end component are closed relative to each other when the burning cleaning furnace is used for burning cleaning, and the flame spraying torches spray flames to the flame blocking end component when the burning cleaning furnace is used for burning cleaning. And the coating sprayed on the surface of the hook is carbonized by the high temperature generated by the flame at the butt joint part between the flame spraying end part and the flame blocking end part. Due to the fact that online treatment is adopted for high-temperature burning cleaning, upper hanging tools, lower hanging tools and transfer are not needed, labor intensity is reduced, and efficiency is improved.

The invention discloses a flame-retardant PVC (polyvinyl chloride) wood-plastic plate which is prepared from the following raw materials in parts by weight: 100 parts of SG-7 type PVC resin; 20-30 parts of modified wood powder; the composite flame retardant is composed of ammonium polyphosphate, aluminum hydroxide, molybdenum trioxide and zinc borate according to the weight ratio of 15: 20: 16: 4; the mass ratio of the aluminum-titanium composite coupling agent to the wood flour is 1: 100; 5-8 parts of a calcium-zinc stabilizer; the lubricant is composed of polyethylene wax, paraffin and calcium stearate according to the weight ratio of 1: 1: 1; and 5-10 parts of an acetyl butyl citrate plasticizer. The invention relates to the technical field of polymer composite materials, in particular to a flame-retardant PVC wood-plastic plate and a preparation method thereof.The flame-retardant PVC wood-plastic plate and the preparation method thereof have the remarkable advantages that due to a composite flame retardant, the oxygen index of the plate reaches 32.1%, the combustion performance reaches the UL94V-0 level, and the smoke density is reduced by 72.1%; the tensile strength, the impact strength and the bending strength are respectively improved by 339.6%, 59.1% and 179.5% when the wood powder is treated by the aluminum-titanium coupling agent; the extrusion temperature of 150-175 DEG C and the screw rotating speed of 12-18 r / min are accurately controlled, the problems of wood powder carbonization and flame retardant decomposition are avoided, and the quality consistency is guaranteed.

The invention discloses straw carbon-based carbon particles and a manufacturing device and method, and relates to the technical field of agricultural ecological environmental protection equipment.The method comprises the following steps that S1, straw is subjected to component separation treatment, and a liquid component, a carbonized precursor rich in lignin and a fiber base material containing cellulose are obtained; s2, performing carbonization treatment on the carbonized precursor to obtain biochar; dissociating the fiber base material to obtain a fiber inner core material; s3, the liquid component serves as an adhesive, the fiber inner core material serves as a particle inner core, biochar serves as a coating outer layer, and carbon particles of a core-shell structure are prepared through a forming technology. Straw is subjected to component separation before carbonization, directional utilization of all components of straw is achieved, compared with an existing mode that straw is directly carbonized and returned to the field, the carbon particles are more environmentally friendly, and the cost is reduced. The carbon particles prepared by the method are beneficial to subsequent fermentation and field application, can reduce the risk of secondary pollution such as dust raising, are beneficial to regulation and control of the soil carbon release process, and improve the comprehensive utilization efficiency of straws.

The application discloses a mesoporous carbon preparation process with recyclable silicon source and mesoporous carbon with small pore size and large specific surface area. The mesoporous carbon preparation process comprises the following steps: preparing a silicon template: reacting a fluosilicic acid solution with calcium carbonate, and separating calcium fluoride precipitate and silica sol; the pH of the silica sol is 2-5; the concentration of silicon dioxide in the silica sol is 1-8 wt%; preparing a precursor: dissolving a carbon source and an organic acid in the silica sol, drying, grinding, and carbonizing in an inert atmosphere to obtain a C / Si precursor; the organic acid comprises at least one of oxalic acid, tannic acid, acetic acid and citric acid; removing the silicon template and recycling the silicon source: treating the C / Si precursor with hydrofluoric acid, and performing solid-liquid separation to obtain mesoporous carbon and a fluosilicic acid solution, wherein the fluosilicic acid solution is used for preparing the silicon template. The specific surface area of the mesoporous carbon is greater than 800 m 2 / g, and the pore size is less than 6 nm.

The utility model provides a novel purifier, which belongs to the technical field of carbonization furnace purification equipment, and comprises a filter water layer arranged in a tank body, a support ring arranged at the upper part of the filter water layer, an overflow pipeline arranged at one side of the upper part of the support ring towards a smoke inlet pipe, and a water collecting tank arranged at the liquid outlet end of the overflow pipeline, a filter plate is arranged in the middle of the interior of the water collecting tank, the upper surface and the lower surface of the filter plate are respectively provided with a positioning frame, a storage fence is arranged on the upper portion of the interior of the water collecting tank, a plurality of adsorption balls are placed in the storage fence, and an isolation fence plate is arranged at the top of the storage fence. The overflow water is filtered by the filter plate, most impurities in the overflow water are adsorbed by the adsorption balls to form a new carrier of the impurities, and the filtered liquid is supplied into the filter water layer through the booster pump, so that the secondary utilization of water resources is realized, and the waste of the water resources is avoided; the adsorption balls can be repeatedly used after being fished up and cleaned by opening the isolation fence plate.

This application discloses a biochar-supported silicate composite material, its preparation method, and its application. The preparation method includes the following steps: mixing an inorganic acid solution with biomass, stirring the resulting mixture at 85℃~95℃ until it evaporates to dryness, to prepare acidified biomass; mixing the acidified biomass with a silicate precursor solution to prepare an acidified biomass-supported silicate composite material; and carbonizing the acidified biomass-supported silicate composite material to obtain the biochar-supported silicate composite material. The preparation method of this application, by pre-treating the biomass with a specific acidification process, enables the prepared biochar-supported silicate composite material to achieve both short-term removal of cationic heavy metals and long-term soil stability, and it exhibits good remediation effects on cationic heavy metals in different occurrence forms.

The present application relates to the field of microcapsules, and discloses a flame-retardant temperature-regulating phase change microcapsule and application thereof in polystyrene foam plastic. The polystyrene foam plastic contains carbon nanotube / magnesium-aluminum layered double hydroxide modified silica coated paraffin phase change microcapsules, the carbon nanotube / magnesium-aluminum layered double hydroxide modified silica wall material has high thermal conductivity, and the magnesium-aluminum layered double hydroxide generates water vapor when decomposed under heat, which dilutes combustible gas, and the decomposition products, silica and carbon nanotubes synergistically promote carbonization to form a dense carbon layer, achieving the effect of flame retardation. When the microcapsules are used as fillers of polystyrene foam plastic, the polystyrene foam plastic has good flame retardation and energy storage temperature regulation effects.

This invention relates to the field of wastewater treatment technology, specifically to a highly efficient adsorbent wastewater treatment agent and its preparation method, comprising the following raw materials in parts by weight: 50-70 parts activated carbon powder, 8-12 parts deionized water, 5-10 parts ammonium bicarbonate, 1-3 parts sodium dodecyl sulfate, 15-25 parts additive A, and 8-15 parts additive B. In this invention, the stably loaded cerium ions can effectively exert their specific coordination and capture effect on heavy metals. The chitosan introduced into the carrier can enhance the electrostatic and chelate adsorption of anionic pollutants and organic molecules. Simultaneously, the well-developed pores formed after shellac carbonization combine with the network structure of chitosan, further increasing the specific surface area of ​​the material and the adsorption capacity of organic pollutants, achieving highly efficient and stable adsorption of heavy metals, dyes, and organic pollutants.

The utility model discloses a system for synchronously preparing biochar with different qualities. The system comprises a starting device, a combustion chamber, a first carbonization device, a second carbonization device and an alkali metal element recovery device, combustible gas generated in biomass carbonization by the starting device, the first carbonization device and the second carbonization device is input into the combustion chamber for combustion, and energy consumption can be reduced. A first flue gas input port of the first carbonization device is hermetically connected with a first flue gas output port of the combustion chamber; a second flue gas output port of the first carbonization device is hermetically connected with a second flue gas input port of the second carbonization device; a third flue gas output port of the second carbonization device is hermetically connected with a third flue gas input port of the alkali metal element recovery device; the flue gas utilization efficiency can be improved, and energy consumption is reduced. The product output port of the second carbonization device is further connected with the second raw material input port of the alkali metal element recovery device, and the alkali metal element recovery device is added, so that waste of alkali metal elements is avoided.

The utility model discloses a vertical carbonization furnace, and relates to the field of activated carbon activation furnaces, the inside of a carbonization section is built by a plurality of connecting blocks, concave bricks and convex bricks, specifically, the middle part of each connecting block is provided with an inclined plane support, and the left and right sides of each connecting block are respectively provided with the convex bricks and the concave bricks; the connecting blocks, the concave brick blocks and the convex brick blocks are built in a step-by-step staggered manner from bottom to top, materials in a carbonization section stay or decelerate on the step-by-step inclined surface supports in the falling process, and meanwhile, the inclined surface supports which are staggered in the step-by-step manner form an air passage. A special structural design is adopted in a traditional furnace body, carbonization is more sufficient, a large amount of high-temperature pyrolysis gas generated in the carbonization process can be output through a channel in the furnace, and waste heat and the pyrolysis gas can be fully utilized; the carbonization furnace cavity adopts a special geometric structure, so that the accumulation of the raw materials can be effectively avoided, and the hot flue gas and the carbonized raw materials are fully carbonized.

The embodiment of the invention provides a vertical heat recovery coke oven and a coking system. The vertical heat recovery coke oven comprises an oven top, a plurality of carbonization chambers and a plurality of combustion chambers, the furnace top is provided with a raw gas crossing hole and a gas balance channel. Wherein the heating horizontal height of the vertical heat recovery coke oven is H, H = h + delta h + A * B, h is the height distance from the coal line of the carbonization chamber to the top wall of the carbonization chamber, delta h = C * the height of the coal line of the carbonization chamber, 1.5 < = A < = 3, 200 mm < = B < = 300 mm, and 5% < = C < = 7%. By increasing the coefficient A with the value range of 1.5-3, increasing the combustion height allowed to be reduced by radiation heat transfer of the combustion chamber and increasing the heating horizontal height, reasonable control over temperature distribution in the furnace is achieved, the temperature of the top space of the carbonization chamber is effectively reduced, deep cracking of hydrocarbons in raw coke oven gas is reduced, and therefore generation and deposition of graphite are inhibited, and the quality of the coke oven is improved. And formation of furnace wall graphite and furnace top graphite is reduced.

The invention discloses a straw carbonization device based on waste heat recycling, and relates to the technical field of straw carbonization devices, the straw carbonization device comprises a separation assembly, the separation assembly comprises a sealed cabin, and springs are arranged at the positions, close to four corners, of the inner top surface of the sealed cabin. According to the straw carbonization device based on waste heat recovery and utilization, when straw is divided into blocks with uniform sizes and enters the oscillation bin, the blocky straw in the oscillation bin is punched through a plurality of flow dividing pipes, so that the blocky straw is dispersed into smaller blocks, in addition, when gas punches the oscillation bin, four springs drive the oscillation bin to oscillate back and forth, so that the straw carbonization effect is improved. In the vibration process, crushed straw falls into a conveying hopper along round holes in an inclined separation plate and finally enters a conveying pipe, the crushed straw is crushed into uniform blocks in the environment with the low oxygen content, on the premise that air is isolated, the sealed conveying advantage of extrusion forming is reserved, and the conveying efficiency is improved. And the heat conduction bottleneck of the compact material blank is avoided through low-oxygen crushing.