165 results about "Bottom ash" patented technology

The invention provides a high-performance fiber-reinforced cement-based material and a preparation method thereof, and belongs to the technical field of building materials, the high-performance fiber-reinforced cement-based material comprises the following components by weight: 30-70% of ordinary Portland cement, 10-30% of pretreated solid waste incineration bottom ash, 0.5-2% of polypropylene fiber, 8-12% of water, and 0.5-1.5% of a water reducer; during preparation, the raw materials are weighed according to the proportion, a high-performance fiber-reinforced cement-based material sample is prepared through ultrasonic stirring, water adding stirring, fluidity adjusting, pouring vibrating and curing, the compressive strength of the prepared sample exceeds 30 MPa, the porosity is lower than that of a traditional material when the replacement rate of the pretreated solid waste incineration bottom ash is 5-10%, and the durability is remarkably improved; meanwhile, waste is effectively utilized, natural resource consumption and carbon emission are reduced, the curing efficiency of heavy metal ions in solid waste incineration bottom ash exceeds 98%, and double breakthrough of environmental protection and high performance is achieved.

The invention provides a fire coal bottom ash-based low-shrinkage foam concrete material based on fluidity control as well as a preparation method and application of the fire coal bottom ash-based low-shrinkage foam concrete material. According to the invention, the proportioning water consumption under different coal-fired bottom ash mixing amounts is accurately calculated through a water consumption calculation formula, and the foam concrete material is prepared by combining aggregate grain composition regulation and control. The foam concrete material provided by the invention not only has the characteristics of low drying shrinkage, sound absorption, heat insulation, light weight, high strength, low cost, wide application range and the like, but also fully utilizes bulk solid wastes such as coal-fired bottom ash and the like, and adopts the coal-fired bottom ash to replace sand aggregate, so that the use amount of sand is greatly reduced, the exploitation of natural resources is reduced, the construction cost is reduced, and the environmental pollution is reduced. And the economic value is improved.

The invention discloses high-ground-temperature-resistant ultra-high-performance concrete as well as a preparation method and application thereof, and belongs to the technical field of building materials. Comprising the following components in parts by weight: 360 to 520 parts of high-sulfate-resistance cement, 36 to 52 parts of silica fume, 36 to 52 parts of fly ash, 800 to 1000 parts of fine aggregate, 80 to 200 parts of composite phase change lightweight aggregate, 800 to 1000 parts of coarse aggregate, 39 to 78 parts of steel fiber, 1.8 to 10.4 parts of sodium borate, 43 to 125 parts of incineration waste bottom ash, 120 to 130 parts of water and 5 to 10 parts of high-efficiency water reducing agent. Through the synergistic effect of the high-sulfate-resistance cement, the sodium borate, the composite phase-change lightweight aggregate and the incineration waste bottom ash, the ultrahigh-performance concrete can keep stability in a high-ground-temperature environment, the durability of the ultrahigh-performance concrete can be improved, and the long-term use safety of the concrete in the high-ground-temperature environment is ensured.

The invention provides a coal-based solid waste cementing material for coal mine filling engineering and a preparation method and application thereof.The preparation method comprises the steps that coal-based solid waste comprises, by weight, 30-60 parts of fly ash, 20-40 parts of furnace bottom ash and 20-30 parts of gasification slag, and the coal-based solid waste is mixed and ground under the action of a grinding aid to obtain a mixture A; wherein the mass of the grinding aid is 0.1-0.5% of that of the coal-based solid waste; preparing the mixture A into a solid waste solution with the mass concentration of 20-40% by using a solvent, and introducing carbonized gas into the solid waste solution to obtain an acidified solution; and mixing and grinding 30-60 parts by weight of desulfurized gypsum, 30-50 parts by weight of lime and 10-20 parts by weight of cement clinker to obtain a mixture B, adding the mixture B into the acidizing solution, and uniformly stirring and mixing to obtain the coal-based solid waste cementing material. The coal-based solid waste cementing material disclosed by the invention is wider in application scene, and meanwhile, the goaf filling cost is effectively reduced, and the coal-based solid waste absorption efficiency is improved.

The invention relates to the technical field of building materials, in particular to a carbon sequestration concrete solid brick prepared from coal-based solid waste and a preparation method of the carbon sequestration concrete solid brick. The carbon sequestration concrete solid brick is prepared from the following raw materials in parts by weight: 20 to 30 parts of fly ash, 65 to 75 parts of furnace bottom slag and 5 parts of cement, wherein the fly ash is secondary ash, the particle size of the furnace bottom slag is smaller than or equal to 4.75 mm, and the mark number of the cement is P.O 42.5. The method comprises the following steps: firstly, enabling carbon dioxide to react with alkaline components such as dicalcium silicate in the fly ash to form carbonate so as to realize effective carbon sequestration; and then through secondary mineralization maintenance, carbon dioxide, active components such as calcium and magnesium in the cement and dicalcium silicate which is not completely reacted in the fly ash are subjected to carbonation reaction, so that a product layer filling effect is realized. According to the invention, the building material with good carbon sequestration performance and excellent mechanical properties is prepared by utilizing industrial solid waste and carbon dioxide, so that energy conservation and emission reduction are realized, meanwhile, greenhouse gas emission is reduced, and the performance of the building solid waste brick is enhanced.

The invention discloses a building material base material produced by utilizing household garbage incineration waste and a preparation process of the building material base material. The base material is prepared from the following components in percentage by weight: 30 to 50 percent of fly ash, 20 to 40 percent of bottom slag, 10 to 20 percent of Portland cement, 3 to 10 percent of Fe-N-C-coated Cu-NPs modifier and 5 to 15 percent of water. Fly ash is subjected to water washing and 600-800 DEG C heat treatment to remove chlorine salt and organic matter, and bottom slag is subjected to screening and magnetic separation to control the particle size and the iron content. Fe-N-C-coated Cu-NPs is prepared through high-temperature pyrolysis and a wet chemical method, and dioxin decomposition and heavy metal solidification are catalyzed. The preparation process comprises the steps of pretreatment, mixing, vibration molding (5-10 MPa) and wet curing (20-35 DEG C, 80-95% humidity and 7-21 days). The compressive strength of the base material reaches 11.8-14.0 MPa, the dioxin content is lower than 0.1 ng-TEQ / kg, the heavy metal curing rate is 96.5-98.5%, the porosity is 10.5-12%, solid waste resource utilization is achieved, and environmental protection and economic benefits are achieved.

The invention belongs to the technical field of mortar materials, and particularly discloses an environment-friendly light jet mortar material produced from municipal waste incineration bottom ash, which comprises the municipal waste incineration bottom ash, a cementing material, a water reducing agent, an accelerator and water, the cementing material comprises cement, silica fume and fly ash, the addition amount of the municipal waste incineration bottom ash accounts for 40-50% of the total mass, and the addition amount of the water reducing agent accounts for 10-20% of the total mass. The addition amount of the coal ash accounts for 0-18% of the total mass, the addition amount of the silica fume accounts for 0-12% of the total mass, the addition amount of the accelerator accounts for 6-9% of the total mass, and the use amount of the water reducing agent accounts for 1.5 wt% of the use amount of the cementing material. According to the environment-friendly light jet mortar material produced by adopting the municipal waste incineration bottom ash, in order to reduce the influence of the municipal waste incineration bottom ash on the environment and find a substitute of natural sand, the potential application of the municipal waste incineration bottom ash as a fine aggregate is discussed; meanwhile, the influence of the auxiliary cementing material on improvement of the performance of the jet mortar prepared from the municipal waste incineration bottom ash is investigated.

The invention relates to the field of solid waste resource utilization, and discloses a method for preparing cement-stabilized bottom ash gravel by using incineration bottom ash artificial aggregate, which comprises the following steps: pretreatment of incineration bottom ash: taking the part with the particle size of less than 4.75 mm as fine aggregate, and preparing the part with the particle size of greater than 4.75 mm into artificial coarse aggregate through ball milling; mixing the incineration bottom ash, a cementing material and water according to a proportion, and preparing artificial aggregate by adopting a cold bonding process through a disc granulator; performing water bath maintenance on the prepared artificial aggregate to form aggregate with certain strength; finally, the artificial aggregate, the incineration bottom ash fine aggregate, the natural aggregate and cement are mixed according to the mixing proportion, and the cement-stabilized bottom ash gravel is prepared through the design of the optimal water content and the maximum dry density. By optimizing the particle size distribution and interface transition zone characteristics of the artificial aggregate, the mechanical property, durability and environmental friendliness of the base material are improved, the production cost and carbon emission are reduced, and high-valued utilization of solid waste is realized.

The invention relates to the technical field of roadbed materials, in particular to a composite filling material and a preparation method and application thereof. The composite filling material provided by the invention is prepared from the following raw materials in parts by weight: 18 to 26 parts of pretreated phosphogypsum, 30 to 45 parts of pretreated household garbage incineration bottom ash, 8 to 18 parts of alkaline excitation material, 6 to 20 parts of aluminum-silicon material, 5 to 25 parts of aggregate and 1 to 4 parts of sodium sulfate aqueous solution, the pretreatment of the phosphogypsum comprises lime milk aging treatment; the pretreated household garbage incineration bottom ash comprises gelation active fine powder and structural aggregate. The composite filling material formed by taking the ardealite, the household garbage incineration bottom ash, the alkaline excitation material and the aluminum-silicon material as main raw materials is high in industrial solid waste mixing amount, stable in performance and environment-friendly, reduces the pollutant leaching risk, is suitable for roadbed structures such as an embankment filling layer, a semi-rigid base layer and a flexible subbase layer, and has a wide application prospect. And the benefit is obvious.

The present invention relates to a cementitious paste, comprising i) bottom ash in an amount of between 1 and 40 wt.% % of the combined weight of bottom ash and cement, wherein the bottom ash has a particle size as determined by sieve analysis according to standard ASTM C136-06 (2015) such that at least 90 % of the particles pass a sieve having a size of 1 mm; ii) cement in an amount of between 60 - 99 % of the combined weight of bottom ash and cement; wherein the combined weight of cement and bottom ash is between 90 and 99.9 wt. % based on the dry weight of the cementitious paste; iii) natural fibers in an amount of 0.1 to 10 wt.% based on the dry weight of the cementitious paste; and iv) water in a weight ratio to the dry weight of the cementitious paste of between 0.4 : 1 to 0.8 : 1. The present invention moreover relates to a concrete composition comprising the cementitious paste and aggregate material. In addition, the invention relates to the use of bottom ash, the use of the cementitious paste and concrete compositions as well as to building products.

Manufacturing lightweight aggregate (LWA) by a sintering technique requires a delicate balance among three conditions: forming sufficient amount of molten liquid phase during sintering; reaching an appropriate viscosity for solid-liquid suspension; and emitting sufficient amount of gas that can be entrapped by the liquid phase to form pores. LWAs were made from low-calcium and high-calcium Waste Coal Combustion Ash (W-CCA) including fly ash and bottom ash. A mass fraction of at least 40% liquid phase for fly ash and 50% for bottom ash is required for a successful entrapment of emitted gaseous phases during sintering. Larger pores were observed in the microstructure of LWA samples made using high-calcium W-CCA in comparison to low-calcium W-CCA. This result was mainly attributed to the high-calcium samples forming liquid phases with lower viscosity values and emitting higher amounts of gaseous phase during sintering than did the low-calcium samples. The gaseous phase was generated by hematite reduction and anhydrite decomposition.

The invention provides a boiler tail flue gas waste heat recovery equipment front bottom accumulated dust cleaning device which comprises a dust collecting assembly and a dust collecting assembly, the dust collecting assembly comprises a dust collecting box, a dust collecting bin and a negative pressure bin are arranged in the dust collecting box, an air inlet and an air outlet are formed in the side wall of the dust collecting box, a filtering piece is arranged between the dust collecting bin and the negative pressure bin, and a negative pressure fan is arranged in the negative pressure bin; the sweeping assembly comprises a dust collection hose, a hard pipe, a handheld pipe, an equipment bin, a dust collection cover, a servo motor and a brush head, the output end of the hard pipe is communicated with the air inlet through the dust collection hose, the handheld pipe is connected to the hard pipe through a connecting piece, the equipment bin is arranged at the end of the handheld pipe, the dust collection cover is arranged in the equipment bin, and the servo motor is arranged in the equipment bin; the brush head is arranged in the dust collection cover and connected with the servo motor, and the input end of the hard pipe is communicated with an inner cavity of the dust collection cover. The device can remarkably reduce the labor intensity of manual cleaning, solves the problem that dead corners are difficult to touch in a traditional mode, and improves the thoroughness of cleaning and the working efficiency.

The present application relates to coal mine sealing fire prevention and carbon sequestration technology field, especially to a kind of adsorption sealing fire prevention and extinguishing material and its application.The adsorption sealing fire prevention and extinguishing material includes porous carrier and organic amine;The preparation method of the porous carrier includes the following steps: mixing garbage bottom ash and slag uniformly, to obtain mixture material;Surfactant is dissolved in water, stirring and foaming, then adding alkali activator and mixing uniformly, to obtain alkaline foaming liquid;The alkaline foaming liquid is mixed with the mixture material to obtain foaming slurry;The foaming slurry is cured at room temperature, to obtain the porous carrier;The organic amine accounts for 5wt%-25wt% of the mass of the foaming slurry.The present application not only takes environmental protection, low cost, simple preparation, but also can seal gob air leakage channel at the same time, and adsorb carbon dioxide, when coal mine fire occurs, ambient temperature rises, and the adsorbed CO2 can be promptly desorbed, to achieve the effect of fire prevention.

The invention relates to the technical field of garbage incinerator devices, in particular to a CFD garbage incinerator for improving the combustion efficiency through primary air and secondary air. The system comprises a garbage incinerator, a comburent feeder arranged on one side of the garbage incinerator, a cyclone separator, a smoke dust remover, filtering and cooling equipment, a chimney and a bottom ash cooler arranged at the lower end of the garbage incinerator, wherein the cyclone separator, the smoke dust remover, the filtering and cooling equipment and the chimney are sequentially arranged on the other side of the garbage incinerator; the blast layer, the lower fluidization layer and the crushing fluidization layer are arranged in the garbage incinerator, primary air is introduced into the blast layer to blow comburent entering the garbage incinerator, so that the comburent is subjected to fluidization combustion in the lower fluidization layer, and secondary air drives the comburent to enter the crushing fluidization layer to be crushed and dispersed. The crushing assembly is used for crushing, dispersing and mixing comburent, the uniformity and stability of the waste incineration fluidization state are maintained, it is guaranteed that the comburent is fully combusted, and the combustion efficiency is improved.

The invention discloses a method and a calcining device for solidifying secondary aluminum ash by utilizing desulfurized gypsum, comprising the following steps: S1. calcining desulfurized gypsum to obtain gypsum clinker; S2. mixing red mud, secondary aluminum ash, and water to obtain slurry A; S3. filtering slurry A and adding bottom ash to obtain slurry B; S4. mixing gypsum clinker and K2SO4 or Na2SO4, and adding the mixture to slurry B to obtain slurry C; S5. shaping slurry C into a solidified body. The desulfurization gypsum of the present application is calcined at high temperature to produce anhydrous gypsum, which has excellent strength, bonding and water resistance, and can firmly solidify the secondary aluminum ash together, reducing the erosion and penetration of external water on the aluminum ash; K2SO4 or Na2SO4 shortens the coagulation time of the slurry and increases its strength; after the red mud and aluminum ash are mixed in water, the alkaline substances released in the red mud can promote the hydrolysis of AlN and metallic Al in the secondary aluminum ash, thereby eliminating the water reactivity of the secondary aluminum ash, preventing the aluminum ash from spontaneously combusting and releasing harmful gases after landfill.

The present invention discloses a low-cost clinker-free cementitious material and its application, which belongs to the field of building materials. Taking the mass of the clinker-free cementitious material as 100%, it includes the following raw materials in percentage by mass: 20-60% of water-quenched blast furnace slag, 10-40% of garbage incineration bottom ash, 20% of washed garbage incineration fly ash, and the balance is desulfurization gypsum. The low-cost clinker-free cementitious material is used to replace cement solidification stabilization on a large scale in preliminary combination with cementitious filling mining technology, or to provide a low-cost cement-free clinker cementitious material for preparing concrete for the construction industry. The low-cost clinker-free cementitious material provided by the present invention has a simple composition and a high overall economic benefit, improves the recycling rate of washed garbage incineration fly ash and garbage incineration bottom ash, and synergistically recycles washed garbage incineration fly ash and garbage incineration bottom ash that are more difficult to comprehensively utilize.

The invention belongs to the technical field of engine air inlet pre-filtering, discloses an automatic ash discharging device and an ash discharging method for a cyclone pipe pre-filter, and aims to overcome the defects of inconvenience in maintenance, high energy consumption, insufficient sealing reliability and the like caused by the fact that the cyclone pipe pre-filter depends on manual ash discharging or a complex active pumping and discharging system in the prior art. The transparent material dust collection shell is matched with the slope side wall with the high outer portion and the low inner portion, so that the dust deposition state is visualized, and dust automatically flows and gathers; a hinged cover plate is arranged at a bottom ash discharge port and is driven to be opened and closed by an electric actuator, wired / wireless dual-mode triggering is supported, and two ash discharge ending conditions of timing automatic closing and manual confirmation closing are matched. The air pre-filter has a good ash discharging effect, it is guaranteed that the cyclone pipe always runs under the designed working condition, the rough filtration efficiency of the air pre-filter reaches 95%, the overall performance of a filtration system is remarkably improved, high reliability and operation convenience are achieved, and the air pre-filter meets the air inlet pre-filtration requirements of engineering machinery, agricultural machinery and other scenes.

This invention discloses a grouting material based on water-treated municipal solid waste incineration bottom ash and its preparation method. The grouting material comprises 65-85 parts by weight of silicate cement, 15-35 parts by weight of municipal solid waste incineration bottom ash, and 39-41 parts by weight of mixing water. Before preparing the grouting material, the municipal solid waste incineration bottom ash is partially treated with mixing water for no less than 15 days. Pre-treating the waste incineration bottom ash with partial mixing water effectively reduces the aluminum content in the bottom ash, inhibiting the expansion and cracking caused by the reaction of aluminum in the alkaline environment of cement to generate hydrogen, thereby ensuring the volume stability and mechanical strength of the material. Ordinary silicate cement is used as the matrix, and water-treated municipal solid waste incineration bottom ash is added as an auxiliary cementing material. The mixture is stirred with water to form a slurry. The resulting grouting material has excellent mechanical properties and is suitable for engineering applications such as foundation reinforcement and rock and soil fissure filling.

A method for forming a treated reclaimed bottom ash sand and a treated reclaimed bottom ash sand. The method includes providing reclaimed bottom ash sand. The reclaimed bottom ash sand is heated with an aqueous composition comprising 0.5 to 3.0M NaOH in a reactor vessel to a temperature of from 40 to 70 degrees Celsius and maintaining the temperature for a time greater than about 4 hours to form a reduced metallic aluminum reclaimed bottom ash sand and iron is removed to form a treated reclaimed bottom ash sand having reduced hydrogen formation in concrete. The treated reclaimed bottom ash sand includes reactive aluminum of less than 50% by weight of the reactive aluminum in the reclaimed bottom ash sand and the treated reclaimed bottom ash sand includes less than 2 wt % iron. A concrete formed from the treated reclaimed bottom ash sand is also disclosed.

A method for processing fly ash to reduce a carbon content thereof is disclosed. The disclosed method may include drying a batch of wet fly ash and separating it into first and second streams of dried fly ash, with the second stream then undergoing classification to remove oversized particles and bottom ash therefrom and thermal treatment to offload carbon therefrom. The method also may include mixing (A) the first stream of dried fly ash and (B) the classified and thermally treated second stream of dried fly ash to produce (C) a processed fly ash mixture having a carbon content in the range of about 3.0–6.0 wt%. In some cases, additive(s) optionally may be added to the processed fly ash mixture, for example, to further adjust its loss on ignition (LOI) to a targeted range. Also disclosed are several systems embodying such methodology.

The utility model relates to the technical field of environmental protection and energy conservation, and discloses an economizer mechanism with an ash removal function and a waste heat recovery system. Each soot blowing device comprises an air cannon, the air cannon is arranged on the flue and located on one side of the heat exchange module of the economizer, the output end of the air cannon extends into the flue and faces the position below the middle of the heat exchange module, the air source communicates with a first pipeline, the first pipeline communicates with the soot blowing devices, and the condensation water main pipe communicates with a second pipeline. According to the plate-type economizer bottom ash removal device, accumulated ash at the bottom of the plate-type economizer can be removed, the equipment blockage risk is reduced, and the risks that the heat exchange efficiency is reduced and the resistance is increased due to the accumulated ash at the bottom are reduced.

This utility model belongs to the technical field of baghouse dust collectors, and in particular, a pulse jet baghouse dust collector. It includes a base plate with four mounting slots. The dust collector also includes: a support frame fixedly mounted on the top of the base plate, on which a pulse jet dust collector is fixedly mounted, with a bottom ash pipe fixedly connected to the bottom of the pulse jet dust collector; a ash guide pipe, the top of which is rotatably connected to the bottom of the bottom ash pipe; and a fixing rod, the bottom of which is fixedly mounted on the top of the base plate, with a disc fixedly mounted on the top of the fixing rod. The disc has four through holes spaced evenly in a ring, and the bottom of the ash guide pipe slides in contact with the top of the disc. This utility model collects and stores dust by setting up multiple collection boxes, and allows for disassembly and cleaning of the collection boxes even when the machine is stopped, greatly improving the working efficiency of the pulse jet dust collector. It is also convenient to operate, saves time and effort, and is highly practical.

The utility model relates to a flame generating assembly. The flame generating assembly comprises simulation false firewood, false firewood bottom ash, a light reflecting device, a driving mechanism and a light source. The simulation fake firewood is arranged above the fake firewood bottom ash, the light reflecting device is arranged below the simulation fake firewood and comprises a first light reflecting strip shaft and a second light reflecting strip shaft which are rotatably arranged, and the driving mechanism drives the first light reflecting strip shaft and the second light reflecting strip shaft to rotate. The light source is configured to project light onto at least one of the dummy firewood and the dummy firewood bottom ash by means of the reflective device. According to the flame generation assembly and the simulation fireplace, the structural design is reasonable and compact, assembling is convenient, cost is relatively low, and the dynamic flame effect can be achieved.

The circulating fluidized bed boiler combustion system comprises a hearth, the cyclone separator, separator vertical pipes and a mixed air supply system, the mixed air supply system comprises a mixed air pipe, a primary air pipeline, a recirculating flue gas pipeline, vertical pipe spray pipes and a mixed air pipe header pipe, the vertical pipe spray pipes are distributed on the mixed air pipe, and the separator vertical pipes are distributed on the mixed air pipe header pipe. The spraying end of the vertical pipe spraying pipe is communicated with the separator vertical pipe, the recirculating flue gas pipeline is communicated with a tail flue outlet and a mixed air pipe header pipe, the tail end of the mixed air pipe header pipe is communicated with a mixed air pipe, and the primary air pipeline is communicated with the mixed air pipe header pipe; and a mixed air supply main valve, a primary air valve and a recirculating flue gas valve are respectively arranged on the mixed air main pipe, the primary air pipeline and the recirculating flue gas pipeline. The efficiency of the separator can be adjusted according to the actual combustion working condition, so that the hearth temperature is guaranteed, and the carbon content of bottom slag is controlled. And meanwhile, a good effect is also achieved on flame-retardant particle combustion enhancement and high alkali metal fuel coking inhibition.

This utility model discloses an anti-clogging structure for a pulse dust collector. The pulse dust collector has a clean air duct and fan connected to its left side for discharging filtered clean air, and a pulse air manifold installed on its right side for cleaning the dust collection bag. Its bottom features an anti-clogging discharge trough, including a dust collection trough, a dust inlet pipe, and an anti-clogging mechanism. In the anti-clogging mechanism, a straight pipe is connected to the bottom ash discharge port of the dust collection trough, and an inclined ash discharge pipe is fixed to the bottom side wall of the straight pipe with their inner cavities communicating. A lower end cover is fixed to the bottom of the straight pipe, and a servo motor is connected to a drive shaft via a coupling. The bottom section of the outer ring of the drive shaft has spiral blades that forcefully transport clogging dust downwards; the top section of the outer ring is connected to a scraper via a support rod. The scraper is close to the inner wall of the dust collection trough and can scrape off clumps of adhering dust. This utility model's anti-clogging structure effectively solves the problem of ash discharge clogging in pulse dust collectors, ensuring stable equipment operation and improving dust removal efficiency.

The invention relates to the field of fuel and boiler systems, in particular to a coal gangue valuable element self-heating extraction system which comprises a feeding module, a crushing module, a decarburization activation module and a valuable element extraction module which are sequentially linked to form a closed loop. The feeding module adopts a belt type and spiral feeding combination; the crushing module is used for crushing the coal gangue until the particle size is below 2cm by using a jaw crusher; the temperature of the decarburization activation furnace is controlled at 750-850 DEG C, coal gangue decarburization, ash activation and rare earth calcination are achieved, flue gas is subjected to heat exchange to produce 300-450 DEG C high-temperature steam for energy supply, and bottom slag is ground to 200 meshes or below for standby application. The valuable element extraction comprises a magnetic separation iron removal sub-module, a hydrochloric acid leaching sub-module and the like, and the system adopts gradient energy utilization (high-temperature steam, medium-temperature steam and low-temperature steam are respectively used for acid leaching, aluminum chloride hexahydrate crystallization, extraction and white carbon black preparation). The system realizes the utilization of all components such as carbon and aluminum in the coal gangue, produces high-value products such as metal gallium and rare earth oxides, realizes self-heating to reduce energy consumption, is matched with an environment-friendly treatment unit, is adaptive to different coal gangue components, and is good in energy efficiency and economical efficiency.

The invention discloses a modified emulsified asphalt mixture and an ultrathin wearing layer preparation method, and belongs to the field of road engineering, the modified emulsified asphalt mixture is prepared from the following components by weight: 10-16 parts of emulsified asphalt, 6-9 parts of epoxy resin, 3-9 parts of a flexibilizer, 0.1-0.5 part of a coupling agent, 90-110 parts of aggregate, and 10-15 parts of a composite filler; the composite filler is one or a mixture of furnace bottom ash, fly ash and polyamide fiber, and through physical crosslinking of the flexibilizer and chemical curing of the epoxy resin, the toughness and bonding performance of the emulsified asphalt are remarkably enhanced; meanwhile, the basalt aggregate is pretreated by adopting the silane coupling agent, so that the surface characteristics of the aggregate are optimized, the interface bonding force between the aggregate and the modified asphalt is greatly improved, and the problem of insufficient performance of a traditional material under traffic load is fundamentally solved.

The utility model relates to the field of boiler bottom ash treatment, in particular to a scraper slag conveyor with good stability, which comprises a triangular sprocket group, the tooth crest of the sprocket group is meshed with a conveying group for conveying slag, and the outer surface of the sprocket group is bolted with a chain scraping group for scraping the outer surface of the conveying group. The material scraping end of the chain material scraping set makes contact with the outer side of the conveying set, the outer side of the chain tooth set is connected with a back material scraping set for scraping materials on the inner surface of the conveying set, and the back material scraping set makes contact with the inner side of the conveying set. According to the invention, the scraper slag salvaging machine is in an inverted triangle state in a slag natural conveying state, and has a high meshing transmission effect in a severe and severe use environment.

This disclosure relates to the field of power generation technology, and in particular to a cooling device and method for a sorting chamber, to solve the problems of poor stability, frequent failures, and low recovery efficiency in existing circulating fluidized bed boilers. The chamber is inclined and has an inlet ash inlet, a first ash discharge outlet, and a second ash discharge outlet. An ash inlet unit is fixedly installed on the chamber and positioned at the ash inlet; the ash inlet unit is used to regulate the amount of ash entering the sorting chamber. The sorting unit is inclined and communicates with the ash inlet unit, discharging the sorted bottom ash through the first ash discharge outlet. The cooling unit includes multiple cooling chambers and multiple baffles, with each baffle forming one cooling chamber. Each baffle contains a cooling medium for cooling, and the bottom ash in the cooling chamber is discharged through the second ash discharge outlet. The sorting chamber cooling device and method provided in this disclosure are used to improve the stability of circulating fluidized bed boilers and reduce their failure rates.

The invention discloses a method for collaboratively treating baking soda desulfurization ash and waste iron oxide desulfurizer. The method comprises the following steps: placing baking soda desulfurization ash in a stirring tank, adding water at a water-ash ratio of (3-5):1, and stirring the mixture into fluidized slurry; uniformly mixing the waste iron oxide desulfurizer and coal at a mass ratio of (1-5):1000, and grinding the mixture with steel balls to obtain a mixed fuel; atomizing the slurry at a fuel delivery port of a pulverized coal boiler, blending the mixture with the mixed fuel, and then feeding the mixture into a furnace for combustion; volatile matter is purified by a terminal gas purification device to generate desulfurization gypsum, and ash is mixed with fly ash and bottom ash. The method reasonably configures the addition amounts of the waste iron oxide desulfurizer and the baking soda desulfurization ash, thereby ensuring that the discharged flue gas meets the ultra-low emission environmental protection requirement, and the ash mixed with the fly ash and bottom ash meets the environmental protection requirement.