26results about How to "Low ash" patented technology

The invention relates to the field of coal dressing flotation reagents, and discloses a green coal dressing flotation reagent and a preparation method and application thereof. The invention provides a green coal dressing flotation reagent which is composed of 70-80 parts of methyl oleate, 15-30 parts of methyl palmitate and 3-6 parts of an emulsifying agent (sorbitan oleate Span80). The preparation method comprises the following steps: firstly, weighing raw materials, magnetically stirring methyl oleate and methyl palmitate for 30 minutes, then mixing with sorbitan oleate (Span80), and heating and stirring in a water bath at 55 DEG C for 2 hours to obtain the medicament. In the application of coal slime flotation, the reagent solution is added into ore pulp and matched with a foaming agent, and flotation clean coal is formed by utilizing bubbles to carry coal slime particles. A plurality of groups of experiments show that the agent is excellent in performance, the clean coal recovery rate can reach 79.66%, the ash content is as low as 10.91%, the agent dosage is remarkably reduced compared with a traditional collecting agent, meanwhile, raw materials are green and environmentally friendly, the coal dressing industry is effectively promoted to develop towards the efficient and green direction, and the agent has extremely high application value.

The invention provides a method and a system for continuously extracting and washing a crude benzomelamine product. The method comprises the following steps: mixing a crude product solid of benzotripolycyanamide with water to prepare slurry capable of continuously flowing, and continuously feeding in a fluid form; enabling the slurry to be in countercurrent contact with washing water in the turntable extraction tower so as to realize continuous extraction and washing of the crude product of the benzotripolycyanamide; meanwhile, the spiral conveyor is additionally arranged at the bottom of the turntable extraction tower, so that washed benzotripolycyanamide solids can be conveniently settled to the lower part of the turntable extraction tower so as to realize continuous discharging and further to be dried. Compared with traditional intermittent cross-flow washing, the method has the advantages that continuous extraction and washing of crude benzomelamine product solids can be achieved, washing efficiency is improved, washing water is saved, impurities such as benzamide and potassium hydroxide remaining in benzomelamine can be efficiently removed, the ash content and the free alkali content of the product are reduced, and the method is suitable for industrial production. And the purity of the benzotripolycyanamide product is improved.

The invention belongs to the technical field of plant active ingredient extraction, and relates to a segmented enzymolysis-cascade membrane separation extraction method of cyclocarya paliurus combined-state selenium polysaccharide and the combined-state selenium polysaccharide prepared by the method. The method comprises the following steps: firstly, constructing a first extraction system for a cyclocarya paliurus leaf raw material, carrying out first-stage enzymolysis, inactivation and solid-liquid separation, separating a first liquid phase through a nanofiltration membrane to form a low-molecular selenium-containing component flow, and excluding the low-molecular selenium-containing component flow in a subsequent alcohol precipitation and recovery step; and constructing a second extraction system from the first solid phase, carrying out second-stage enzymolysis, inactivation and solid-liquid separation, sequentially carrying out microfiltration, first ultrafiltration, second ultrafiltration and nanofiltration washing on the second liquid phase, and carrying out ethanol precipitation to obtain the combined-state selenium polysaccharide. The proportion of target molecular weight interval components in the obtained product is increased, the mass fraction of polysaccharide is increased, and the proportion of inorganic selenium, the mass fraction of protein and the ash content are reduced.

The application discloses a method for preparing direct reduced iron from iron-containing raw materials with near-zero carbon, and belongs to the technical field of steel metallurgy. The method comprises the following steps: uniformly mixing iron-containing raw materials, an organic-inorganic composite binder, biomass carbon and water, and then sequentially performing high-pressure forming and drying and solidification to obtain cold briquetting; and the cold briquetting is reduced by pure hydrogen to obtain direct reduced iron. The method can prepare cold briquetting suitable for the performance requirements of a shaft furnace for direct reduction at a relatively low temperature (<300 DEG C), and further prepares direct reduced iron by pure hydrogen reduction. The method has a short process flow, near-zero carbon emission, and provides a new technical route for the green and low-carbon transformation of the steel industry.

The utility model discloses a kind of perforating device of bundled straw biomass fuel, including frame, and frame is provided with perforating device, and perforating device includes linear power mechanism, mounting seat and punch assembly, the end surface of mounting seat is connected with linear power mechanism, and the other end surface is provided with punch assembly;The bottom of frame is provided with the positioning assembly for positioning straw bundle, and linear power mechanism drives punch assembly to carry out punching operation to the straw bundle after positioning. Linear power mechanism includes any one in hydraulic cylinder, cylinder, electric cylinder, and hydraulic cylinder is connected with hydraulic pump group and control valve group, cylinder is equipped with gas source equipment and solenoid valve, electric cylinder is electrically connected with servo driver and controller. The utility model punches in straw bundle, obtains straw bundle with air hole, increases airflow flow in straw bundle, effectively improves the combustion efficiency of whole straw bundle, can effectively reduce the volume and structure of combustion furnace, reduces combustion furnace investment cost.

The utility model provides a device for generating coke breeze for blast furnace injection by pyrolyzing feed coal, which comprises a feeding unit, a pyrolyzing and separating unit, a heat carrier heating unit and a blast furnace injection separating unit which are sequentially connected, the pyrolysis and separation unit is divided into a pyrolysis reaction area and a gas-solid separation area, a solid outlet of the gas-solid separation area is connected with the heat carrier heating unit, an upper outlet of the heat carrier heating unit is connected with the blast furnace injection separation unit, and the blast furnace injection separation unit is used for extracting coke breeze for blast furnace injection. Through the arrangement of the washing and grinding device, the granularity of feed coal is controlled, the ash content in the feed coal is reduced, coke breeze is heated after pyrolytic reaction, the ash content of the coke breeze is reduced, and the granularity of the coke breeze is controlled through separation, so that the coke breeze can meet the use requirements of blast furnace injection materials, and the utilization value of low-rank coal and coke breeze products is improved; the device is simple in structure, easy and convenient to operate, low in cost, high in economic benefit and wide in application range.

This invention discloses a rapid deep peak-shaving system and method for co-firing biomass in a coal-fired circulating fluidized bed, belonging to the field of fuel combustion technology. This invention controls in-furnace combustion by adjusting the biomass co-firing ratio and feeding position, thereby improving the response rate under varying loads. It utilizes a bed material storage and conveying system to recycle the bed material in the furnace, recover the sensible heat of high-temperature ash slag, and control the material concentration and circulation loop stability during load changes. Furthermore, this invention introduces heated, clean, low-oxygen flue gas into the furnace, suppressing the formation of excessive nitrogen oxides and facilitating bed temperature stability during rapid load changes.

This invention discloses a cerium sulfosalicylate sulfonate for use as a coal combustion catalyst, its preparation method, the catalyst itself, and its applications. The preparation method includes: S10, mixing cerium nitrate and sulfosalicylic acid dihydrate with water to obtain a cerium sulfosalicylate complex solution; S20, adding the cerium sulfosalicylate complex solution to a first reverse micelle solution to obtain a first mixed solution, then adding n-butanol in batches to obtain a first microemulsion; S30, adding ammonia to a second reverse micelle solution, then adding n-butanol in batches to obtain a second microemulsion; S40, mixing the first and second microemulsions and stirring to obtain a pale blue, opalescent colloidal solution, thus obtaining a second mixed solution; S50, drying and grinding the second mixed solution to obtain cerium sulfosalicylate. This cerium sulfosalicylate coal combustion catalyst is easily dispersed and can catalyze the pyrolysis and oxidation processes of coal from within, improving the utilization rate and calorific value of coal.

The invention discloses a lubricating oil composition with low friction and high extreme pressure properties and application of the lubricating oil composition. The lubricating oil composition is characterized by comprising lubricating base oil, ZDDP, carboxylic acid end group beta-diketone and aromatic ester, the viscosity grade of the lubricating base oil is between SAE 20 and SAE 50, and the lubricating base oil accounts for 90-98% of the total mass of the lubricating oil composition; the mass ratio of the ZDDP to the carboxylic acid-terminated beta-diketone to the aromatic ester is 1: (1-2): (1-4), and the total mass of the three is 2-10% of the total mass of the lubricating oil composition; the molecular structure of the beta-diketone is redesigned, the molecular polarity of the beta-diketone is adjusted to increase the chemical adsorption capacity of the beta-diketone, and meanwhile, the adaptability of the beta-diketone in the lubricating base oil is improved by using the aromatic ester, so that the lubricating oil can have excellent properties of low friction and high extreme pressure.

This invention belongs to the field of battery manufacturing technology, specifically relating to a wood-based hard carbon anode material, its preparation method, and its application in sodium-ion batteries. Addressing the high cost of hard carbon material precursors, this invention proposes a method for preparing a wood-based hard carbon anode material, comprising: using natural wood particles as a carbon source precursor, first subjecting them to hydrothermal treatment in a strong acid solution containing hydrogen peroxide, followed by high-temperature carbonization to obtain the wood-based hard carbon anode material. This invention uses natural wood as a raw material, eliminating the need for pore-blocking agents, and thus forming a wood-based hard carbon anode material with a closed-cell structure, providing a better environment for sodium ion insertion and extraction.

The utility model discloses single crystal furnace main heater calcining equipment which comprises an equipment base, a side plate is integrally formed on the side of the equipment base, a top plate is integrally formed at the upper end of the side plate, six groups of main heaters are positioned in the equipment base, and a device seat is positioned at the bottoms of the main heaters. An observation window is formed in the edge side of the side plate, high-temperature-resistant glass is positioned on the inner side of the observation window, codes are arranged on the equipment base, and a heater supporting mechanism is fixed to the position, where the main heater is positioned, of the equipment base. According to the single crystal furnace main heater calcining equipment, six main heaters can be calcined at the same time, the use effect of the heaters can be verified in time by calcining in advance, the heating state, hot resistance, cold resistance and the like of the heaters can be monitored in time, the state of the heaters can be monitored in real time, the ash content of graphite pieces can be reduced, and the service life of the heaters is prolonged. And therefore, the blow-in ignition probability is greatly reduced.

The present invention relates to a composite collector for high-ash difficult-to-clean coal and a deep flotation process, belonging to the technical field of fine-grained coal flotation, and solves the problems of low selectivity, low collection performance, large dosage of reagents, low clean coal yield and low clean coal grade in the prior art. A composite collector for high-ash difficult-to-clean coal, the composite collector is composed of an intermediate and two tail chain molecules, the intermediate and the two tail chain molecules can be assembled to form a Gemini-like structure through electrostatic action, and its chemical structure is generally formulated as #imgabs0#, the intermediate structure is generally formulated as #imgabs1#, R1 in the intermediate structure contains some atoms of N, S, O, and C atoms, and the total number of non-hydrogen atoms in R1 is 2 to 8; R2 contains N atoms or two types of N and C atoms, and the total number of atoms is 1 to 3. It is achieved that while ensuring the clean coal yield, the clean coal ash content is reduced and the amount of collector is reduced.

This invention discloses a method for preparing carbon aerogel using water-soluble resin as a precursor. A reaction solution is prepared using water-soluble resin, aldehydes, an alkaline catalyst, and distilled water. Cyclodextrin, a pore-forming agent, is added to the clarified reaction solution. The reactants are then fed into a rapidly stirred oil phase, sheared into uniform micron-sized particles, and gelled at elevated temperatures to obtain a powder suspension. The suspension is centrifuged or filtered to obtain a powder, which is repeatedly washed with hot ethanol and then separated to obtain a powder material. The dried powder material is added to a carbonization furnace for carbonization to obtain carbon aerogel powder. The carbon aerogel powder is then added to a box-type atmosphere furnace and CO2 is introduced to obtain activated carbon aerogel powder with a porous network structure. This invention has the advantages of wide availability of raw materials and low production cost, making it suitable for large-scale industrial production, especially for the fabrication of supercapacitor electrodes, lithium-ion electrodes, and lithium-sulfur electrodes.

The present invention relates to a method for extracting and purifying pea proteins, comprising the steps of (a) providing an aqueous composition comprising pea proteins; (b) isolating said pea proteins from said aqueous composition comprising pea proteins; (c) obtaining said isolated pea proteins as an aqueous slurry having a pH ranging from 4.0 to 5.8; and (d) subjecting said aqueous slurry having a pH ranging from 4.0 to 5.8to a temperature of at least 75°C. Also described herein are pea protein compositions and are food or feed products comprising said pea protein compositions.

The present invention relates to a method for preparing a composite collector for high-ash difficult-to-clean coal using waste cooking oil, which belongs to the technical field of fine coal flotation and solves the problems of low selectivity, low collection performance, large dosage of reagent, low clean coal yield and low clean coal grade in the prior art. A method for preparing a composite collector for high-ash difficult-to-clean coal using waste cooking oil comprises the following steps: (1) filtering and removing impurities and dehydrating the waste cooking oil; (2) preparing an intermediate aqueous solution at room temperature; (3) adding the waste cooking oil treated in step (1) to the intermediate aqueous solution, and adjusting the pH of the mixed solution of the waste cooking oil and the intermediate solution to 7.5-8.5; (4) stirring the mixed solution in step (3) to obtain a composite collector with a Gemini-like structure. The method achieves the goal of reducing the ash content of the clean coal and the dosage of the collector while ensuring the clean coal yield.

This invention relates to the field of cellulose ether modification technology, specifically to a low-ash composite modified sodium carboxymethyl cellulose and its preparation method. The preparation method includes: acidifying, alcoholizing, washing, resodiumizing, and purifying sodium carboxymethyl cellulose to obtain a low-ash precursor; reacting the low-ash precursor with sodium 2,3-epoxypropylene-1-sulfonate in a reaction medium composed of isopropanol and water, followed by reaction with propylene oxide to obtain an intermediate containing carboxymethyl, sulfonyl, and hydroxypropyl groups; subsequently reacting the intermediate with amino-modified β-cyclodextrin and purifying it; and then reacting it with formaldehyde and 1-adamantane isonitrile without the addition of free cyclodextrin inclusion agents to obtain low-ash composite modified sodium carboxymethyl cellulose. The resulting product has the characteristics of low ash content, low chloride ion residue, low water insoluble matter, salt resistance, hard water resistance, and good rheological stability after thermal aging, making it suitable as a filtration reducer for water-based drilling fluids.

This invention discloses a heavy media separation process for upgrading coal slime. Coal slime is pumped into a coal slime classifying hydrocyclone at a feed pressure of 110-150 kPa, resulting in underflow and overflow. The underflow, with a particle size of 0.15-1 mm, enters a coarse coal slime tank, where the coal slime concentration is adjusted to 30-33%. This 30-33% concentrated coal slime is then pumped into a spiral separator to obtain concentrate and tailings. The concentrate flows by gravity into a dewatering and deashing system, while the tailings are pumped into a separation and classification system. The overflow, the fine particle outlet of the dewatering and deashing system, and the fine particle outlet of the separation and classification system are all connected to a thickening system. This invention regulates the concentration of the underflow from the coal slime classifying hydrocyclone using a coarse coal slime tank, maintaining the coal slime concentration entering the spiral separator at 30-33%, thus improving the separation efficiency of the spiral separator and reducing the ash content of the concentrate and tailings, thereby improving the quality of the coal slime product.

The present invention relates to a method for preparing coal-based activated carbon for sewage treatment, and belongs to the technical field of activated carbon preparation. The method comprises the following steps: S11, raw material pretreatment; S12, batching; S13, carbonization; S14, activation; S15, post-treatment; S16, modification treatment. In the present invention, a coal-based activated carbon that can be used for sewage treatment is prepared by optimizing the preparation process of coal-based activated carbon and modifying the coal-based activated carbon. By modifying the binder and modifying the activated carbon in the preparation process, the hardness of the coal-based activated carbon is increased, the ash content is reduced, and the activated carbon has more adsorption sites, thereby showing excellent sewage treatment ability.

The invention belongs to the technical field of low-temperature dry distillation and pyrolysis of coal, and particularly discloses a dry distillation and pyrolysis process and system for low-rank coal, which comprises an airflow sorting device, a multi-stage fluidized bed and an entrained-flow bed, the multi-stage fluidized bed comprises a first-stage fluidized bed, a second-stage fluidized bed and a third-stage fluidized bed, and the multi-stage fluidized bed is arranged up and down; an outlet of the entrained-flow bed is connected with an inlet of the III-stage fluidized bed, a branch pipe is separated from a coal gas outlet and connected with an inlet of the entrained-flow bed, and the quality and composition of the low-rank coal possibly have large differences in different mining areas, coal seams or coal briquettes. If the non-uniformity is not fully considered in the selection and pretreatment process of pyrolysis raw coal and some coal briquettes with high ash content are mixed into the pyrolysis raw coal, an oil product is easily polluted by ash after pyrolysis, the raw coal with different granularities is shunted through the airflow sorting device, and the different raw coal is treated by using the entrained-flow bed and the fluidized bed; therefore, the ash content in the product is reduced.

The present application relates to a kind of coffee wastewater natural fermentation modified petroleum coke preparation industrial silicon composite reducing agent method, belong to carbonaceous reducing agent pellet preparation technical field.The present application is mixed after coffee wastewater, alkali metal additive and petroleum coke, and wet grinding is carried out, and grinding is uniformly obtained mixture A;Mixture A is placed in the closed environment in temperature 20~35 ℃ Natural fermentation 7~28d obtains fermentation carbon material B, and after drying, fermentation carbon material powder is obtained;Coffee shell powder is added to NaOH solution and soaked activation treatment, solid-liquid separation obtains coffee shell binder;Fermentation carbon material powder, coffee shell binder, water are uniformly obtained fermentation carbon material mixture;Fermentation carbon material mixture is formed by cold pressing, and drying obtains cylindrical blank;Cylindrical blank is placed in argon atmosphere and is microwave calcined, and cooling obtains industrial silicon composite reducing agent pellet.The fixed carbon content of the composite reducing agent of the present application is high, and the chemical reaction activity is high, and the ash content and volatile content are low.

The application provides a low-ash non-road compression ignition engine lubricating oil and an additive mother liquor and a preparation method thereof, and relates to the technical field of lubricating oil. The mother liquor comprises a polyisobutylene succinimide ashless dispersant, a metal detergent composed of low-sulfur high-alkali overbased magnesium salicylate and low-sulfur high-alkali overbased calcium salicylate, a friction modifier system containing organic molybdenum, an organic borate ester friction modifier and a polar ester film forming agent, a rust inhibitor and corrosion inhibitor composed of succinic acid half ester rust inhibitor and benzotriazole corrosion inhibitor, a modified polyether demulsifier, a zinc-containing and phosphorus-containing anti-wear agent of zinc dialkyldithiophosphate, a phosphoric acid ester ashless anti-wear agent and an antioxidant. The mother liquor is used for preparing a low-ash compression ignition engine lubricating oil under the constraint of low-SAPS, and is beneficial to the combination of soot dispersion, friction and wear resistance, oil-water separation, rust and corrosion prevention and post-processing compatibility.

This invention discloses a lignin-based supercapacitor carbon, its preparation method, and its applications, aiming to solve the technical problems in existing supercapacitor carbon preparation processes, such as low utilization rate of potassium-based activators, susceptibility to "potassium explosion," poor product purity and electrochemical stability, and high production costs. The method includes the following steps: First, the lignin solvent is purified, then mixed with a binder, water, and an activator to form pellets with uniform structure. The pellets undergo a low-temperature curing-high-temperature activation synergistic treatment to achieve controlled radial slow diffusion of potassium vapor, improving activator utilization, suppressing "potassium explosion," and reducing costs. The activated product is then acid-washed with organic acid and dried to obtain the lignin-based supercapacitor carbon. This invention achieves low-cost, high-purity, and high-stability lignin-based supercapacitor carbon preparation. The process route is simple and controllable, with good environmental compatibility, suitable for large-scale industrial production, and has broad application prospects and significant industrial application value in the field of supercapacitor carbon materials.

The invention provides a high-chlorine coal washing system and a high-chlorine coal washing method, relates to the technical field of coal washing processing, and aims to solve the problem that chlorine elements in coal are difficult to remove at the front end of a boiler. The high-chlorine coal washing system comprises a raw coal crushing and screening device, a raw coal storage and leaching device, a coarse particle coal washing device and a fine particle coal washing device. The raw coal crushing and screening device is used for crushing raw coal, screening the raw coal into coarse particles and fine particles according to the particle size and conveying the coarse particles and the fine particles to different raw coal bins. The raw coal storage and leaching device comprises a plurality of raw coal bins, and water circulation mechanisms are arranged in the raw coal bins and used for supplying water to the raw coal bins. The coarse-particle coal washing device is used for screening coarse-particle low-chlorine clean coal from coarse-particle coal discharged from the raw coal bunker; and the fine-particle coal washing device is used for screening out flotation low-chlorine clean coal from fine-particle coal discharged from the raw coal bunker. The dechlorinating device can be used for dechlorinating coal before the coal enters a boiler for combustion.

The application discloses a kind of fermented vegetable oil and its production method.The application belongs to resting cell whole-cell enzymatic fermentation process: first by high-density fermentation to obtain yeast bacteria liquid, then separation and washing to obtain clean high-activity yeast bacteria, high-activity yeast bacteria, water, vegetable oil are mixed according to proportion, under specific temperature, oxygen supply and pH condition, by whole-cell enzymatic fermentation process using resting yeast bacteria to ferment vegetable oil, after fermentation, secondary centrifugal filtration is obtained fermented vegetable oil.Compared with the fermented vegetable oil obtained by conventional microbial fermentation process, the fermented oil obtained by the application has less impurities, lighter color, cleaner oil, lower ash content, stronger oxidation stability, longer shelf life and other advantages, and compared with natural vegetable oil crude oil, it is rich in free fatty acids, flavonoids, polysaccharides and natural glycolipids, has better skin moisturizing, repairing, soothing and antioxidant effects, and has good economic value and application prospect in the field of beauty and skin care.

This disclosure relates to the field of carbon black technology, specifically a method for reducing the ash content of palm shell plant carbon black. The palm shell plant carbon black uses palm shells as raw material. The method includes the following steps: providing palm shells as raw material, carbonizing the palm shells to obtain palm shell plant carbon black; adding the palm shell plant carbon black to a first acidic solution and performing ultrasonic cleaning; then soaking it in a second acidic solution, followed by dry ball milling, and then soaking it in a third acidic solution; followed by wet ball milling; finally, after post-treatment, obtaining palm shell plant carbon black with reduced ash content. The method provided in this disclosure significantly reduces the ash content and other impurities in palm shell plant carbon black prepared from palm shells.