39 results about "Biomass ash" patented technology

The application discloses a device and method for preparing green hydrogen through biomass pyrolysis and gasification, relates to the technical field of green hydrogen preparation, and solves the problems of blockage and corrosion caused by ash melting and slagging in the pure oxygen gasification process, and the problem of low energy utilization rate. The device for preparing green hydrogen through biomass pyrolysis and gasification comprises a pyrolysis reaction device, and the pyrolysis reaction device comprises a pyrolysis reaction tank connected with a high-temperature heat carrier conveying spiral, a biomass raw material storage bin, a biomass raw material conveying spiral and a pyrolysis solid-phase product conveying spiral. In the application, biomass raw materials are converted into biochar and pyrolysis oil gas through pyrolysis technology, the biomass ash is effectively cut, and problems such as blockage and corrosion caused by ash melting and slagging in the pure oxygen gasification process are effectively avoided; the high-temperature pyrolysis oil gas is directly subjected to pure oxygen gasification reaction through gasification technology, the sensible heat and latent heat in the pyrolysis oil gas are fully utilized, and the energy utilization rate is high.

The invention discloses a high-activity red mud-biomass ash composite oxygen carrier and a multistage construction method and application thereof, and belongs to the technical field of solid waste resource utilization, pretreated red mud powder and biomass ash are compounded, and the biomass ash composite red mud oxygen carrier is prepared after drying and roasting; through modification of K and Ca components in the biomass ash, a high-activity phase is directionally generated in the red mud, an alkaline site is introduced, the oxygen vacancy concentration is increased, and the surface property is optimized; when the oxygen carrier is applied to a chemical looping gasification process, the release activation energy of lattice oxygen can be reduced, the reaction rate and the carbon conversion rate can be improved, the generation of CO2 can be inhibited, the selectivity and the yield of synthesis gas can be improved, and the oxygen carrier has excellent anti-sintering capability and cycling stability; a large amount of solid waste red mud and biomass ash are used as raw materials, the oxygen carrier preparation process has the characteristics of low cost, simple process and environmental friendliness, and a new way is provided for high-value utilization of the red mud and the biomass ash and industrial application of a chemical looping technology.

The invention discloses a biomass power plant ash composition for improving soil carbon sink as well as a preparation method and application of the biomass power plant ash composition, and belongs to the technical field of agricultural resources and environment. The composition is formed by compounding fly ash and slag according to the dry basis mass ratio of (2-3): 1, and the heavy metal content of the composition meets the agricultural safety standard. The preparation method comprises the steps of raw material pretreatment and optimized compounding. The core of the method is that the fly ash is used as a main carbon source by increasing the proportion of the fly ash, physical protection is provided by utilizing the microporous structure of the slag, and the fly ash and the slag jointly act on the soil, so that the organic carbon library of the soil is rapidly and stably increased. Experiments show that the composition provided by the invention can significantly improve the organic carbon content and the carbon library management index (CPI) of soil, effectively reduce the daily average mineralization rate of organic carbon, and realize efficient and high value-added resource utilization of biomass ash in the field of soil carbon sequestration.

The invention relates to the technical field of low-carbon gelling, in particular to a preparation method of a low-carbon gelling material containing AOD (Argon Oxygen Decarburization) slag solid waste. The preparation method comprises the following steps: adding 50-60 parts of activated AOD slag and 20-30 parts of modified aluminum oxide into 80-100 parts of water, stirring and dispersing to form a matrix suspension, sequentially adding 10-15 parts of biomass ash, 5-8 parts of nano CaCO3 and 3-5 parts of sodium carbonate into the matrix suspension, and stirring at the stirring speed of 200-300 rpm for 30-40 minutes; 0.8-1.2 parts of superfine basalt fibers and 0.3-0.6 part of sodium gluconate are added, the mixture is stirred at the speed of 500-600 rpm for 15-20 min, and the low-carbon cementing material is obtained. The early strength increasing speed of the low-carbon cementing material containing the AOD slag solid waste is increased, and the durability of the low-carbon cementing material containing the AOD slag solid waste under complex environmental conditions is improved.

The invention discloses a method for efficiently utilizing biomass in a metallurgical blast furnace, which comprises the following steps: S1, pretreating a biomass raw material to obtain a biomass crushed material; s2, drying the biomass crushed material to obtain a biomass dried material; s3, baking the biomass dried material at low temperature to obtain a biomass baked material; s4, performing primary pyrolysis on the biomass baking material to obtain primary pyrolysis gas and biomass pyrolysis carbon; s5, the biomass pyrolytic carbon is subjected to secondary pyrolysis, and biochar, biomass ash and secondary pyrolysis gas are obtained; and S6, the first-stage pyrolysis gas is heated and purified, and then the purified first-stage pyrolysis gas and the purified second-stage pyrolysis gas are sprayed into the blast furnace to serve as an energy medium and a reducing agent to be utilized. According to the method, the biomass energy can be used for the metallurgical blast furnace, and the influence of alkali metal elements introduced into the biomass on the quality of blast furnace equipment and steel products can be avoided.

This invention discloses a method for screening the stability of biomass-derived hard carbon raw materials. The method involves treating biomass materials from different sources and batches that can be used to prepare hard carbon with an acid solution, then testing the sugar content, ash content, and coin capacity of the finished hard carbon. The method utilizes the relationship between these parameters to simply and quickly screen out biomass-derived hard carbon raw materials with good stability, thereby obtaining biomass-derived hard carbon materials with excellent battery cycle stability and good electrochemical performance. When the biomass ash content, sugar content, and coin capacity of the biomass-derived hard carbon after acid treatment satisfy the relationship 10≤α / β×σ≤50, an effective balance between biomass ash and sugar content can be achieved. This balance allows for the formation of a specific porous structure, increasing sodium storage sites and improving sodium ion conductivity, while also preventing excessive ash and impurities from affecting the electrochemical performance of the hard carbon material. This ensures the high energy storage capacity and excellent cycle stability of the hard carbon material.

The invention provides an environment-friendly gravel concrete preparation process which comprises the following steps: mixing low-clinker gel, modified biomass ash and iron powder, and uniformly stirring to obtain a mixture A; then adding the recycled aggregate and the modified sand grains into the mixture A, and uniformly stirring to obtain a mixture B; adding a water reducing agent into the mixture B, and uniformly stirring to obtain a mixture C; and then adding seawater electrolytic calcium carbonate paste into the mixture C, and uniformly stirring to obtain the environment-friendly gravel concrete. The recycled aggregate is prepared by modifying waste concrete blocks. The environment-friendly gravel concrete has good environmental protection property, mechanical strength and working performance.

The application discloses modified biomass ash as well as a preparation method and application thereof, and belongs to the technical field of modified materials. The preparation method of the modified biomass ash comprises the following steps: mixing biomass ash, poultry feather hydrolysate and a flocculating agent, and then drying to obtain the modified biomass ash. The application further provides modified biomass ash prepared by the above preparation method. In addition, the application further provides application of the modified biomass ash prepared by the above preparation method or the modified biomass ash in preparation of a soil conditioner. The modified biomass ash can improve heavy metal contaminated soil and improve the quality of crops.

This invention discloses a method for improving tropical acidic soil based on deep tillage and synergistic use of alkaline materials, belonging to the field of agricultural soil improvement technology. This method targets strongly acidic paddy soils or dryland soils with an initial pH ≤ 5.0, and includes: deep tillage to a depth of 35-45 cm at a soil moisture content of 15%-20%, with complete return of crushed straw to the field; uniform application of a compound conditioner on the surface, consisting of: 80-120 kg / mu of quicklime, 80-120 kg / mu of biomass ash, and 150-250 kg / mu of calcium-magnesium soil conditioner, wherein the biomass ash is a byproduct of a biomass power plant, and the pH value is 9-10 under a water-to-soil ratio of 1:2.5; and rotary tillage to ensure that the coefficient of variation of the material distribution within the 0-20 cm soil layer is ≤ 12%. This invention utilizes deep tillage and the synergistic effect of three materials in a specific ratio to form a three-level buffer system of "rapid-release-long-lasting effect," achieving rapid improvement and long-term stability of soil pH. It solves the problems of soil compaction and short-lasting effect caused by the application of lime alone, while effectively alleviating deep acidification. It is particularly suitable for strongly acidic paddy soils or dryland soils with an initial pH ≤ 5.0.

The application discloses a carbonate rock powder-based mineral admixture and a preparation method thereof, and relates to the technical field of mineral compositions; the carbonate rock powder-based mineral admixture comprises the following components in proportion by weight: 50-60 parts of carbonate rock powder, 30-40 parts of biomass ash and 10 parts of red mud; the three kinds of bulk solid wastes, i.e., the carbonate rock powder, the biomass ash and the red mud, are compounded, the inherent defects of single carbonate rock powder in the application in concrete are successfully solved, and high-quality and bulk-quantity utilization of multi-source solid wastes are realized; based on the physical and chemical synergistic effect among the components, tight particle packing is realized, when the carbonate rock powder-based mineral admixture is applied in concrete, not only the workability of fresh concrete is ensured, but also the hardened concrete structure is extremely dense, and the mechanical strength, the impermeability, the corrosion resistance and other durability of the hardened concrete structure are improved.

The present application provides a kind of exogenous seaweed ash modified biochar and its preparation method, comprising the following steps: selecting large seaweed biomass and low ash biomass, obtaining the precursor powder to be treated;Large seaweed is calcined under air atmosphere, and the original ash is collected, and the original ash is ground pretreated, to obtain the exogenous ash to be used;Low ash biomass powder and exogenous ash are physically mixed in proportion and fully ground, so that the mineral components in the exogenous ash are uniformly loaded in the biomass matrix;The obtained mixed powder is placed in a protective atmosphere for high-temperature carbonization to prepare biochar;The obtained biochar is mixed with an activating agent at a mass ratio and then subjected to high-temperature activation treatment;After activation, the product is washed with acid, then washed with water until neutral, dried, and the exogenous seaweed ash modified biochar is obtained.The present application solves the problem of dependence on high-pollution chemical agents in the preparation of high-performance carbon materials from low-ash biomass, and realizes the resource utilization of biomass ash.

The application discloses a reversible photothermal evaporator based on biomass ash and biochar as well as a preparation method and application thereof. The evaporator is prepared by dissolving polyvinyl alcohol and chitosan in an acetic acid aqueous solution, mixing biomass ash and biochar to obtain a spraying solution, and spraying the spraying solution on a filter membrane with a reversible polyhedral structure having edges and corners, and then spraying a glutaraldehyde solution to form a hydrogel layer. The photothermal evaporator can be used for seawater desalination and exhibits excellent seawater desalination performance. The core features are as follows. Firstly, the photothermal evaporator can provide an efficient resource utilization path for biomass thermal conversion byproducts. Secondly, the unique reversible structure can realize periodic switching of the working surface during operation, and relying on the self-cleaning mechanism of the alternating cycle, the photothermal evaporator can realize continuous and stable treatment of high-concentration brine, and effectively overcome the performance degradation problem caused by salt accumulation of a traditional solar interface evaporator.

The invention belongs to the technical field of environmental protection, and provides a heavy metal stabilizing agent derived from waste incineration fly ash and a use method, the heavy metal stabilizing agent comprises the following components in parts by mass: 40-90 parts of sodium dimethyl dithiocarbamate, 10-50 parts of calcium hydroxide, 1-20 parts of phosphorus-containing waste, and 1-20 parts of biomass ash; the heavy metal stabilizing agent is prepared from phosphorus-containing waste, biomass ash and other low-cost waste resources, the agent cost is greatly reduced, meanwhile, through the synergistic effect of all the components, Pb, Cr, Zn, Cu, Ba and other heavy metals in the waste incineration fly ash can be efficiently solidified, the leaching amount of the heavy metals can be remarkably reduced, the solidification effect is superior to that of the prior art, and the method has good application prospects. The potential harm of heavy metals in the fly ash to the environment is effectively reduced, so that the treated fly ash better meets the treatment standards of landfill and the like, and the method has both economical efficiency and environmental protection property.

The invention discloses a composite microbial agent for soil improvement and a preparation method thereof, and relates to the technical field of microbial agent preparation, the composite microbial agent comprises the following raw materials: a composite carrier, a functional material, modified xanthan gum, a strain fermentation broth and an adhesive; according to the invention, the composite carrier is added, silica sol-biomass ash modified bentonite provides a stable shelter for viable bacteria by virtue of a nano coating structure, and the composite carrier has the functions of water retention, stress resistance and heavy metal passivation; the charcoal provides a carbon source with a high specific surface area and improves the soil porosity; humic acid can adjust the pH value of soil and promote rhizosphere colonization of strains; the nano kaolin enhances the adsorption performance of the carrier through the original nano particle size, and Al < 3 + > is separated out to participate in the cross-linking reaction of the modified xanthan gum; the soil conditioner is high in viable bacterium loading rate, the granular structure and nutrient adsorption capacity of the soil are remarkably improved through the synergistic effect of all the components, and the soil conditioner is good in compatibility with strain fermentation liquor and functional materials and can adapt to various soil types such as acidity, salt and alkali, heavy metal pollution and the like.

The invention discloses a biomass ash collecting and processing device, and relates to the technical field of dust removing equipment, the biomass ash collecting and processing device comprises a steel structure support and a collecting box, a bag-type dust remover is fixedly mounted at the top of the steel structure support, and an ash discharging valve is fixedly mounted at a discharging port in the bottom of the bag-type dust remover; a dust discharging pipeline is fixedly installed at a dust discharging port in the bottom of the dust discharging valve, the collecting box is arranged under the dust discharging pipeline, the dust discharging device further comprises a fixing frame, the fixing frame is fixedly installed on the surface of the steel structure support, and a guide groove is formed in the outer wall of the fixing frame; the screw rod driving device is fixedly mounted in the fixed frame; the height of the butt-joint pipe can be adjusted, the butt-joint pipe can be flexibly matched with collecting boxes with different heights, the equipment cost is reduced, the stainless steel pipe directly extends into the collecting boxes, and flying dust diffusion of biomass ash in the discharging process is effectively reduced.

The invention relates to a method for extracting and recycling silicon element in biomass ash solid waste into a molecular sieve, and belongs to the field of solid waste recycling and solid adsorption materials. According to the method, the silicon element in the biomass ash solid waste which is rich in the silicon element and widely exists in the agricultural and industrial fields is fully extracted through a melting extraction method, then the extracted silicon element is added and reused as a molecular sieve material through a template-free hydrothermal synthesis method, and the molecular sieve material is applied to the technical field of solid adsorption. The device is especially suitable for industries of carbon capture, adsorption separation, gas sensing, gas purification and the like. According to the method, a large amount of biomass ash solid waste generated in the agricultural and industrial fields can be effectively recycled, silicon resources in the solid waste can be fully recycled, and the problems of treatment of the biomass ash solid waste and industrial silicon element source pollution can be effectively solved.

The invention belongs to the technical field of soil conditioning, discloses a method for synergistically improving sandy soil by utilizing an agriculture and forestry biomass ash-based material, and aims to solve the problems of complicated construction, high cost, non-lasting effect and poor ecological compatibility in sandy soil treatment. The material is composed of seven components including pretreated agriculture and forestry biomass ash serving as a main functional phase, an anti-cracking auxiliary material, a slow-release regulation and control phase, sand stabilization bricks with hollow spaces are prepared through the processes of mixing, high-pressure forming and the like, the sand stabilization bricks are arranged in a determinant mode or a honeycomb mode according to the wind speed to construct an earth surface sand stabilization wall, pretreated drought-enduring seeds are arranged, and then the sand stabilization bricks are put into the sand stabilization wall. The method has the advantages that the construction is simple and convenient, the cost is low, the cooperation of sand blocking and soil improvement is realized, the organic matters and the water-holding capacity of the soil are obviously improved after the method is applied, the loss amount of the sandy soil is greatly reduced, and the ecological compatibility is good.

The invention discloses a tobacco leaf curing biomass ash recovery supervision and resource utilization system, and relates to the technical field of agricultural waste treatment and resource utilization, and the system comprises a sealed recovery transfer module which recovers curing barn biomass ash and transfers the biomass ash; the standardized pretreatment module is used for sorting and adsorbing impurities and then screening out pure ash residues; the component detection and proportioning module detects nutrients, dosages are determined by means of a potassium nitrate accurate addition amount calculation formula, and mixing is performed; granulating, drying, cooling and screening the organic fertilizer processing module to obtain a semi-finished product; the quality detection supervision module detects and supervises the whole process and calculates the utilization rate to form a closed loop; according to the invention, a five-module closed-loop treatment system is constructed, sealed recovery transfer and standardized pretreatment operation are matched to prevent dust raising of ash and improve the purity, the product quality is controlled by virtue of accurate proportioning, and the whole process is traceable and refined ash treatment is promoted by virtue of layered supervision and an unqualified product backflow mechanism, so that the environmental burden is reduced, and the production efficiency is improved. And resource circulation is realized.

This invention belongs to the field of aquaculture technology, specifically relating to a biomass ash, its preparation method, and its application. The biomass ash is the ash obtained after burning biomass raw materials, containing phosphate ions, potassium ions, copper ions, manganese ions, iron ions, zinc ions, magnesium ions, and calcium ions. The preparation method of the biomass ash includes air-drying, pulverizing, and granulating the biomass raw materials, then burning them at 600–800 °C for 60–120 minutes under oxygen-supplied conditions, followed by sieving to obtain the biomass ash. This biomass ash is placed in permeable bags and suspended in the water body for giant freshwater prawn farming to achieve slow ion release; it can also be used in conjunction with quicklime during the pond drying stage to establish a two-stage mineralization system. This invention can achieve a comprehensive, continuous, and stable replenishment of multiple ions in the water body, effectively improving the molting success rate of giant freshwater prawns and realizing the resource utilization of waste.

The invention relates to the technical field of preparation of plant ash bricks, and discloses a preparation method of an agriculture and forestry biomass plant ash brick. According to the invention, biomass plant ash is used as a main raw material, and a specific composite binder is matched, and the composite binder comprises sodium bentonite, anhydrous gypsum, an oxidized starch-acrylamide grafted copolymer, redispersible latex powder, wood fiber and gamma-aminopropyltriethoxysilane. The preparation process comprises the steps of raw material pretreatment, dry material premixing, liquid material preparation, total mixing blank making and natural curing. Through a multi-component functional compounding and synergistic reaction mechanism, efficient excitation of the activity of the plant ash is realized at normal temperature, and the obtained brick body has relatively high compressive strength, good crack resistance and durability, also has ecological compatibility and controllable degradation characteristics, and is suitable for non-bearing wall and ecological slope protection engineering.

The utility model provides an efficient cyclone separator and a dust remover, and belongs to the technical field of boilers. The problems that according to an existing cyclone separator, due to the fact that biomass ash is light in weight, most ash can be mixed again along with flue gas in a cone area to take off and is taken away by the flue gas, the separation efficiency of the cyclone separator is greatly reduced, and then the combustion efficiency of biomass fuel and the service life of a heated surface are affected are solved. The dust collector comprises a barrel, a pushing body, a dust falling pipe, a perforated barrel and a perforated pushing body, the barrel is connected with the pushing body, the perforated barrel is mounted in the barrel, the perforated pushing body is mounted in the pushing body, the perforated pushing body is communicated with the perforated barrel, and the dust falling pipe is mounted at the bottom of the perforated pushing body. The device is mainly used for boiler dust removal.

The invention discloses a biomass power plant ash composition for synergistically improving soil carbon sink and microbial activity and a preparation method and application thereof, and belongs to the technical field of agricultural resources and environment. The biomass ash composition comprises fly ash and slag, and the mass ratio of the fly ash to the slag is (1-3): (1-3); and determining the physicochemical properties and the heavy metal content of the biomass ash composition. The preparation method comprises the steps of raw material pretreatment and compounding. According to the soil diagnosis result, the optimal formula is selected, blind application is avoided, and the input-output ratio of improved resources is maximized. The defects (FA bacteriostasis and BS carbon sequestration are weak) of a single component are overcome, the unification of two contradictory targets of carbon sequestration and enrichment is realized, and the functions of a soil organic carbon library and an ecological system are synchronously improved. A high-added-value resource utilization way is found for solid waste, waste is turned into wealth, the cost is low, and the method conforms to the strategy of circular agriculture.

The invention relates to the field of biomass thermochemical conversion and gas fuel preparation, and discloses a biomass gasification enhanced hydrogen production method based on segmented oxygen supply. Comprising the following steps: continuously feeding solid biomass which is crushed and dried to a target water content into the upper part of a gasification furnace, and enabling the material to sequentially pass through an upper reaction region, a middle reaction region and a lower reaction region; an upper-section oxygen supply gas flow, a middle-section oxygen supply gas flow and a lower-section oxygen supply and steam gas flow are respectively introduced into the three-section reaction zone, so that a main oxidation zone is formed in the middle reaction zone, and a hydrogen production priority zone is formed in the lower reaction zone under the conditions of a preset gasification equivalence ratio and a steam-carbon molar ratio; a first height interval is selected in the hydrogen production priority area in the height direction to construct a local hydrogen-rich reaction zone, and high-temperature steam, oxygen-containing gas and hydrogen-rich synthesis gas are introduced for backflow; and identifying the slagging risk height and adjusting the position of the main oxidation zone by combining the biomass ash softening temperature threshold value and the monitoring result of the furnace temperature and the bed pressure difference arranged along the height.

The present application belongs to the field of fertilizer preparation, and particularly relates to an active silicon-calcium-potassium-magnesium fertilizer, and preparation and application thereof. The active silicon-calcium-potassium-magnesium fertilizer contains biomass ash 60%, mineral humic acid 30% and binder 10% by weight. The active silicon-calcium-potassium-magnesium fertilizer is used as base fertilizer or topdressing. When used as base fertilizer, the application amount is 200 kg, and when used as topdressing, the application amount is 50 kg. The present application uses biomass ash of a biomass thermal power plant as the main raw material, adds appropriate amount of mineral humic acid, uses clay as binder, and uses granulation process to prepare granules, and then uses film spraying technology to inoculate functional bacterial agent. On the one hand, the present application solves the resource recycling of a large amount of biomass ash of a biomass power plant, and on the other hand, the present application improves the activity of silicon, calcium, potassium and magnesium in the product, and meets the needs of crops for silicon, calcium, potassium and magnesium.

The invention discloses an efficient preparation method of nano silicon dioxide based on biomass power plant ash. The method comprises the following steps: crushing, sieving and drying the biomass power plant ash; then an HCl solution with the concentration not exceeding 5 mol / L is added according to the solid-to-liquid ratio of 1: 8-1: 10, after constant-temperature heating reflux, suction filtration and drying are conducted, and acid pretreatment ash is obtained; mixing the acid-pretreated ash and NaOH solid according to a mass ratio of 1: 0.6-1: 1.4, and activating at high temperature to obtain alkali-molten ash; adding the alkali fusion ash into a NaOH solution with the concentration of not more than 5mol / L according to the solid-to-liquid ratio of 1: 8-1: 10, carrying out constant-temperature heating reflux, and carrying out suction filtration to obtain a filtrate which is a water glass solution; and finally, introducing CO2 into the water glass solution in a constant-temperature water bath kettle at a certain rate for a period of time, stopping introducing CO2, aging for 0-72 hours under a normal-temperature condition, carrying out suction filtration, and drying, so as to obtain the nano silicon dioxide. According to the method, the waste biomass ash is used as the raw material, the cost is low, the process is simple, the prepared nano silicon dioxide is high in purity and extraction rate, waste resource utilization is achieved, and the preparation cost of the nano silicon dioxide is reduced.

The invention relates to a method for obtaining a pulverulent hydraulic binder, comprising a step of hydrating biomass ash, said hydration step comprising bringing said biomass ash into contact with liquid water, the amount of water brought into contact being from 1 to 5% by weight relative to the weight of biomass ash, or said hydration step comprising bringing said biomass ash into contact with gaseous water.

The invention belongs to the technical field of inorganic materials, and particularly discloses a preparation method of white carbon black with low aluminum content and controllable specific surface area, which comprises the following steps: (1) preparing high-concentration bio-based water glass by using pretreated biomass ash as a raw material; (2) diluting the obtained high-concentration bio-based water glass into two kinds of low-concentration bio-based water glass, wherein one kind of low-concentration bio-based water glass is heated under the action of a nucleating agent to generate sol reaction; and (3) adding another low-concentration bio-based water glass and a precipitant into the reaction liquid in the step (2), and continuously reacting to obtain the low-aluminum-content white carbon black with the controllable specific surface area. According to the method, the content of aluminum in the white carbon black is reduced from the source by adopting a biomass raw material, water glass with different moduli is obtained by adopting different dissolution processes, and the specific surface area regulation capability of the white carbon black is endowed by linkage control of the concentration of a reaction solution, the type / feeding proportion of a nucleating agent, the reaction temperature, the reaction time, the feeding speed of a precipitator and the like.

The invention relates to concrete and a preparation method thereof and relates to the technical field of concrete raw materials, raw material components of the concrete comprise water, cement, sand and coarse aggregate, and further comprise an admixture and a water reducing agent, the coarse aggregate comprises the coarse aggregate with the particle size of 5-10 mm and the coarse aggregate with the particle size of 12-16 mm, and the admixture contains SiO2 nanoparticles; the preparation method of the SiO2 nanoparticles comprises the following steps: pretreating biomass ash, mixing the pretreated biomass ash with a template agent, carrying out a first reaction on a system mixed with the biomass ash and the template agent and a first silicon source at 5-10 DEG C, and carrying out a second reaction on the system subjected to the first reaction and a second silicon source at 40-50 DEG C to obtain the SiO2 nanoparticles. And roasting the system after the second reaction to obtain the SiO2 nanoparticles. The concrete has the technical effects of low cost, ultrahigh compressive strength and excellent construction performance.

The utility model discloses a throwing device for applying biomass ash to crops, belongs to the technical field of throwing of biomass ash, and solves the problems that the throwing device is relatively troublesome to use and cannot be used for directly throwing the biomass ash in a powder form. Comprising a machine shell, a handle fixedly connected with the machine shell, an air duct communicated with the machine shell and a connecting pipe, the end, away from the machine shell, of the connecting pipe is communicated with a material barrel with an opening in the top face, the top face of the material barrel can be opened and closed, the material barrel is filled with biomass ash, a fan is arranged in the machine shell, a self-reset switch is fixedly connected to the handle, and the self-reset switch is connected with the connecting pipe. A power supply is arranged in the grip, the power supply is electrically connected with the self-reset switch, the electric fan further comprises a control circuit, the control circuit is coupled with the fan, and the control circuit controls the rotating speed of the fan. According to the utility model, an operator is allowed to put biomass ash into the charging barrel and seal the charging barrel, and the ash is sprayed to farmland for fertilization through the fan. And if the biomass ash is blocked, the device can automatically pressurize to solve the problem.

This invention relates to the field of advanced wastewater treatment and biomass ash reuse, and discloses a method and system for removing trace pollutants from wastewater treatment plant effluent using biomass ash. The method is carried out in a system including an equalization tank, an ozone catalytic reaction tank, and a biochemical buffer tank, and includes: (1) introducing the effluent into the equalization tank for homogenization to obtain reclaimed water I; (2) introducing the reclaimed water I into the ozone catalytic reaction tank for ozone catalytic reaction to obtain reclaimed water II; (3) introducing the reclaimed water II into the biochemical buffer tank to contact with biofilm-coated microbial carriers for biochemical treatment to obtain effluent. The method provided by this invention can achieve efficient removal of trace organic pollutants from effluent, without the addition of chemical reagents, making it environmentally friendly and free from secondary pollution; at the same time, it can improve the biodegradability of the effluent.