69results about How to "Short carbonization time" patented technology

The invention provides chitosan activated carbon and a preparation method thereof, which belong to the field of biomass activated carbon. This invention enriches preparation methods of biomass activated carbon. The chitosan activated carbon is formed by taking chitosan as raw material, performing activation treatment through metal ion solution and then performing microwave carbonization. The method activates chitosan through metal ions and then utilizes microwave carbonization to quickly carbonize the activated chitosan so as to obtain the chitosan activated carbon. The preparation method solves the problem that the conventional thermal-decomposition carbonization method is long in time consumed for preparing chitosan carbon materials and incapable of directly subjecting chitosan to microwave carbonization, and synchronously completes the carbonization and activation of chitosan activated carbon materials. Meanwhile, the chitosan activated carbon prepared by the method has the advantages of short needed time, simple preparation method and readily available equipment.

The invention provides modified biomass charcoal for treating arsenic pollution as well as a preparation method and an application of the modified biomass charcoal. The preparation method of the modified biomass charcoal comprises steps as follows: (1) biomass raw materials are charred, and the biomass charcoal is obtained; (2) the biomass charcoal is subjected to a reaction with a hydrochloric acid solution, solid-liquid separation is performed, a solid substance is obtained, is washed till the pH is neutral and then is dried, and the pretreated biomass charcoal is obtained; (3) the pretreated biomass charcoal and a FeCl3 solution are subjected to a reaction under the condition that the solution pH is neutral, solid-liquid separation is performed after the reaction, and mud cake is obtained; (4) the mud cake is dried and then washed till the pH is neutral, solid-liquid separation is performed, an obtained solid is dried for a second time, and the modified biomass charcoal is obtained. The modified biomass charcoal has large specific surface area and high iron content; the preparation method is simple and easy to operate; the modified biomass charcoal can be applied to treatment of arsenic waste and passivation of arsenic in farmland soil, and food safety is guaranteed.

The invention provides a process for preparing sodium dichromate, namely producing the sodium dichromate through a carbonization method comprising: converting sodium chromate into the sodium dichromate via carbon dioxide under pressurizing condition; delivering sodium chromate neutral liquor with impurities removed to a carbonization tower after a cascade reaction of more than three continuous towers; obtaining carbonizing liquor by controlling different gradient parameters (concentration and temperature of the carbonizing liquor, partial pressure of the carbon dioxide, carbonizing time and the like), continuously carbonizing and separating under pressure; obtaining sodium dichromate finished products through concentrating, filtering, evaporating, crystallizing and centrifugal dehydrating.

The invention relates to a biomass carbonization device, which mainly includes: a combustion chamber, a feed transmission belt, a biomass stock bin, a flash dryer, a flue gas outlet, a heat pipe air preheater, a hollow screw shaft with a heat accumulator, an upper sleeve, a lower sleeve, a biomass charcoal transmission belt, a pipeline, a spraying settling chamber, an oil separation pool, a carbonization chamber and auxiliary equipment. The device can realize comprehensive utilization of biomass carbonization products, and can realize co-production of biomass charcoal and bio-oil. At the same time, by adopting a circulating heat exchanger repeatedly, the emptied gas can have a low temperature, and the energy loss can be substantially reduced. The design of the hollow screw shaft with the heat accumulator realizes staged carbonization and combustion, thus improving the carbonization efficiency. The biomass carbonization device provided in the invention has the advantages of little pollution, high carbonization efficiency, good production environment, etc., and can achieve automated control. The biomass carbonization device is applicable to carbonization of straws, rice husks, sawdust, peanut shells and other biomass, and is suitable for rural families.

The invention discloses a selenium-doped ferrous disulfide carbon-coated composite material. The composition of the selenium-doped ferrous disulfide carbon-coated composite material is FeSe*S2-*@C, wherein x is 0.1-1.9. When applied to sodium ion batteries, the selenium-doped ferrous disulfide carbon-coated composite material can effectively inhibit volume expansion effects and increase actual specific capacity, rate capability and cycling performance. The invention also discloses preparation and application methods of the selenium-doped ferrous disulfide carbon-coated composite material.

The invention relates to a novel method for preparing active carbon with high specific surface area from coal and waste and old plastics by microwave, which belongs to the technical field of preparation of active carbon. The method comprises the following steps of: separating different components in coal; carrying out pulverization and oxidization preprocessing on the obtained fusain and vitrinite component; mixing with different waste and old plastics in a certain proportion; adding certain amount of activating agent and uniformly mixing and then placing the mixture into a crucible; embedding the crucible into a ceramic container provided with a heat insulating material and placing the ceramic container into a microwave oven; preheating the ceramic container under the radiation of small microwave power and carrying out carbonized activation by needed power in certain time; cooling and washing by a proper amount of hydrochloric acid; drying and pulverizing to obtain the active carbon with high specific surface area. The preparation process is based on a microwave heating technology and is simple and quick; the active carbon prepared by the synergistic effect of the coal and the plastics has high adsorptive values of methylene blue and iodine and can be used for the treatment of wastewater; meanwhile, the white pollution is eliminated, and the application prospect is wide.

The invention discloses a carbonizer for producing nano calcium carbonate. The carbonizer comprises a calcium hydroxide blending tank, a calcium hydroxide slurry storage tank, a primary carbonization nucleation reactor, a primary carbonization growth reactor, a primary carbonization ageing tank, a secondary carbonization tubular reactor and a calcium hydroxide activating tank; and a slurry carbonization reaction tube and a carbon dioxide porous reaction tube which have two-end uninterrupted repeated arch structures are arranged in the primary carbonization nucleation reactor, the primary carbonization growth reactor and the secondary carbonization tubular reactor respectively. By the method for producing the nano calcium carbonate through the carbonizer, the calcium carbonate can be produced by the nucleation stage and the growth stage, and is controlled stepwise, the reaction degree of the whole carbonization process can be monitored, the nano calcium carbonate with uniform particle size distribution, regular crystal structures and stable quality can be produced, and the invention has the advantages of small equipment investment, short carbonization time, low energy consumption and the like.

The invention discloses a method for preparing charcoal through microwaves. The method comprises the following steps: I) mixing half-dried sludge, biological straw powder and charcoal powder, and pelletizing and molding so as to obtain molded granules; II) putting the molded granules in a microwave oven for carbonization so as to obtain carbonized granules; III) dividing the carbonized granules into two unequal parts, crushing a small part of the carbonized granules so as to obtain the charcoal powder serving as a raw material of the step I), and feeding back to the step I); soaking a large part of the carbonized granules into a 3-5mol/L KOH or NaOH solution for 12-18 hours, soaking in 5-6mol/L diluted hydrochloric acid for 0.5-2 hours, bleaching the material after acid pickling by using distilled water till the pH value is 6.5-7, and drying at 120 DEG C, so as to obtain charcoal of a porous structure. By adopting the method, the reaction velocity is accelerated, the reaction time is shortened, the energy consumption is reduced, and defects of a conventional pyrolysis method and a microwave wet method can be overcome.

The invention relates to a coking method which adopts two-step methods to produce formed coke to fat coal, gas coal, non-caking coal, long flame coal, brown coal and peat. The two-step method comprises adding raw material coal into a coking furnace to coke after thermally process to be semi coke in middle temperature, namely gasification, dry distillation, carbonization integrated system coking method, and achieving the purpose of coking fat coal, gas coal, non-caking coal, long flame coal, brown coal and peat through utilizing the two-step coking method, breaking raw material coal to be grain size which is under 1.5mm, adding right amount of mineral binder bond and coke tar to mix, molding through cold pressure, and modeling coke products through high temperature carbonization. Since the above mill coal can coke, which solves the problem of coking coal shortage, generates bigger social benefit, and can local and ground proximity coal coking, therefore the production cost is lowed, and considerable economic benefit can be produced. The appearance of GCC two-step coking method colors the integral coking technique, and extends the development of the field.

The invention discloses a method for measuring phospholipid in lipid, and the method comprises the following steps: carbonizing, ashing and dissolving of lipid; and molybdenum blue colorimetry measurement of phosphorus, wherein the lipid is carbonized by adding concentrated sulphuric acid, and a hydroxide, a carbonate or a bicarbonate of an alkali metal. In the invention, the concentrated sulphuric acid is used for pre-carbonizing, and alkali is added for reacting, so that the carbonization of different amounts of various lipids can be completed within 15 minutes, splashing and combustion generated in a direct electric furnace heating carbonization procedure are prevented, and the carbonization time is shortened; the hydroxide, carbonate or bicarbonate of the alkali metal is used for displacing ZnO, so that the soluble phosphate with higher thermal decomposition temperature is generated, and the ashing time is shortened; and the ashed product can be dissolved and filtered directly, sothat the following operations are simpler and safer.

The invention belongs to the field of carbon material preparation, and particularly relates to a preparation method of a lignin-based porous carbon material. Under the oxidation action of low-concentration hydrogen peroxide, ozone blowing during low-temperature carbonization and a low-temperature carbonization charking process are combined, so that the orderliness and regularity of lignin molecules are improved, the oxidation of unsaturated bonds of lignin is promoted, and the activation of an activating agent melamine pyrophosphate is carried out, so that small molecules can be quickly removed during high-temperature cracking, the charking time is shortened, the yield of the carbon material is increased, and the obtained carbon material is more excellent in performance.

The invention discloses a processing method of a surface-carbonized poplar solid wood floor, and belongs to the technical field of floor processing. The method comprises the following steps of S1, placing a poplar board into a drying kiln for drying until the moisture content of the poplar board is 8-12%, carrying out steam-injection softening treatment on the surface of the poplar board for 3-5 minutes, and keeping the poplar board for 10-20 minutes under the condition that the hot-pressing pressure is 1.0-1.2 MPa and the temperature is 160-190 DEG C; S2, machining the poplar board into a floor blank; S3, putting the floor blank into a high-temperature carbonization tank, carrying out carbonization treatment by using steam or nitrogen as protective gas, wherein the carbonization temperature is 220-300 DEG C, and the carbonization time is 5-20 minutes; and S4, brushing and painting the carbonized floor blank to obtain a finished floor. The processing method is used for modifying the fast-growing poplar, the surface strength and the dimensional stability of the poplar are improved, the moisture-proof effect is good, and the service life is long.

The invention relates to a cultivation farm solid waste continuous pyrolysis carbonization treatment method and device. The device comprises a solid waste crushing treatment part, a heat supply part, a prepositive treatment part, a carbonization treatment part, a gas treatment part and a gas utilization part, wherein the solid waste crushing treatment part is used for carrying out crushing treatment on solid waste; the heat supply part is provided with a combustor, and used for introducing a flaming port of the combustor into a combustion chamber to obtain high-temperature flue gas; the prepositive treatment part is used for putting the crushed solid waste into a prepositive treatment chamber, and introducing the high-temperature flue gas of the heat supply part to perform heating; the carbonization treatment part is used for sending the solid waste subjected to prepositive treatment into the carbonization treatment chamber, and introducing the high-temperature flue gas of the heat supply part to perform heating; the gas treatment part is used for respectively collecting gas-phase products generated in the prepositive treatment and carbonization treatment, and performing condensation to obtain a condensed liquid and an incondensable gas; and the gas utilization part is used for introducing the incondensable gas into the combustion chamber of the heat supply part to perform combustion. The invention also relates to a device for implementing the method. The method and device have the advantages of simplified technique, simple equipment structure, high operation stability and reliability, short carbonization time, high energy utilization efficiency and the like.

The invention discloses a novel process for preparing an environment-friendly compound contaminated-soil in-situ repairing agent with abandoned biomass by combining the advantage of rich abandoned biomass resources in our country and the current situation that the soil combined pollution is serious in our country. According to the process, the abandoned biomass and a certain amount of quick lime are mixed and then subjected to hydro-thermal treatment under a certain condition, centrifugal solid-liquid separation is performed, and the compound contaminated-soil in-situ repairing agent is obtained. The soil repairing agent is simple in preparation process, regenerable and low in cost, the occurrence mode of heavy metal in soil can be changed, the heavy metal in the contaminated soil is efficiently passivated, and the total amount of bioavailable organic pollutants PAHs in the soil can also be remarkably lowered, in other words, efficient in-situ repairing of the organic-inorganic compound contaminated soil is achieved. The repairing agent is prepared through the abandoned biomass, and efficient in-situ repairing of the compound contaminated soil is achieved while clean recycling utilization of the abandoned biomass is achieved.

The invention discloses a sodium ion battery negative electrode material and a preparation method thereof. The preparation method comprises the steps that spiral nanometer carbon fibers are prepared at low temperature through a chemical vapor deposition method, then the spiral nanometer carbon fibers are carbonized and acidified in sequence, finally, a molybdenum source, a sulfur source and the acidified spiral nanometer carbon fibers are mixed, and then the mixture is put into a reaction kettle for hydrothermal reaction, and then is subjected to centrifuging, freeze-drying and annealing to obtain the sodium ion battery negative electrode material. The sodium ion battery negative electrode material prepared by the method has good conductivity and cycling stability.

The invention discloses a charring solid-wood composite board and a production method thereof. The charring solid-wood composite board production method includes the steps that step S101, a solid-wood composite board body is heated in a hot-press plant ranging from 170 DEG C to 210 DEG C in temperature and kept for 20 min to 60 min under the preset pressure; step S102, water vapor is sprayed into the hot-press plant, and the indoor humidity is made to reach 90% to 98%; step S103, the indoor temperature is made to be cooled to be at the preset temperature value. According to the charring solid-wood composite board and the production method, the solid-wood composite board body is put into the hot-press plant to be heated to be 170 DEG C to 210 DEG C and kept for 20 min to 60 min under the preset pressure, and charring and then cooling are conducted on the solid-wood composite board body, and charring is finished. The solid-wood composite board is smaller in thickness, and certain pressure is applied in the heating process, so that the heat conduction speed is high in the charring process, the charring time is shorter, accordingly the charring cost is reduced to a certain degree, the charring cycle is shortened, production efficiency is improved, and the application space of the solid-wood composite board is expanded.