23 results about "Bottom ash" patented technology

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 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.

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.

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.

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.

This application discloses an energy-saving coal processing bottom ash recycling device, relating to the field of coal processing and recycling technology, including a sorting box, a screening component, and a cleaning component; the screening component includes a filter plate, mesh, and motor four; the cleaning component includes a robotic arm one, a push plate one, a dredging component, a robotic arm two, and a push plate two; the dredging component includes a push needle and an electrorheological fluid bladder; motor four, robotic arm one, and robotic arm two are all fixed to the inner wall of the sorting box; mesh is opened on the filter plate, and motor four is fixed to one side of the filter plate; it can realize that the filter plate is rotated by motor four, so that it is in a state of vertical downward mesh during cleaning. Under the action of gravity, the impurities that are cleaned can fall directly from the vertical mesh more smoothly, avoiding secondary blockage caused by accumulation in the inclined or horizontal mesh, thus improving cleaning efficiency; robotic arm two drives push plate two to abut against and slightly shake the tip of push needle, so that the side edge of push needle can scrape the inner wall of the mesh.

Non-hydraulically reactive blended particulate compositions for use in making low carbon blended cement or low carbon concrete include a pozzolanic component having a first D90 and a mineral filler component having a second D90 greater than the first D90 dry blended without intergrinding, wherein the composition is free of hydraulic cement. The pozzolanic component can have a D90 less about 45 μm and the mineral filler can have a D90 greater than about 45 μm. The pozzolanic material can be fly ash, bottom ash, metallurgical slag, silica fume, metakaolin, volcanic ash, natural pozzolan, calcined shale, calcined clay, and / or ground glass. The mineral filler component can be aggregate fines, quarry fines, limestone powder, granite fines, stone dust, rock dust, marble dust, mine tailings, pulverized bottom ash, pulverized metallurgical slag, ground recycled concrete, pulverized shale from shale oil extraction, or pulverized sand from tar sand extraction.

This utility model provides a bottom ash suction device for a coal-fired chain grate boiler, including an ash pot. A bag filter is installed above the ash pot, and the top of the bag filter is connected to the inlet of a Roots blower via a pipeline. A discharge device is installed below the ash pot, and an ash hopper is installed below the discharge device. One side of the ash pot is connected to one end of a ash suction pipe, and the other end of the ash suction pipe is connected to a suction nozzle. An air mixing port is opened on the side of the suction nozzle, and an air mixing inlet pipe is provided on the air mixing port. This utility model has a strong blower suction power, which can easily suck up larger ash lumps. It consumes less energy and has low operating costs. The bag filter can thoroughly filter dust in the air, ensuring environmental hygiene. The ash suction pipe uses a transparent steel wire hose, which can prevent it from being squeezed out by negative pressure and allows the flow of ash inside the pipe to be seen. The air mixing port on the side of the suction nozzle ensures that some air is mixed in while sucking up ash, ensuring that the airflow carries the ash smoothly into the ash pot and preventing ash blockage in the ash suction pipe.

This utility model relates to the field of grate furnace technology, specifically to an ash hopper at the bottom of an incinerator grate furnace, comprising: a first section, a second section, an air duct section, a manhole, an expansion section section, and a third section arranged sequentially from top to bottom. An auxiliary ash-collecting assembly is installed inside the third section. The outlet of the third section is connected to the inlet of an ash conveyor. The auxiliary ash-collecting assembly includes: a rotating shaft installed inside the third section, with a drive motor connected to the input shaft. The drive motor is bolted to the third section, and an impeller is fixed to the rotating shaft. The drive motor drives an eccentric wheel to rotate via the rotating shaft. The eccentric wheel pushes a lever to rotate reciprocally around a positioning shaft. The lever pulls a ball block to move reciprocally, causing the ball block to repeatedly collide with the inner wall of the ash hopper at the bottom of the incinerator grate furnace, thus dislodging the ash adsorbed on the inner wall of the ash hopper.

The present application relates to a kind of low carbon cementitious material and its preparation method and application, the preparation method includes the following steps: raw material pretreatment, mixing, reaction, filtration drying, mixing calcination and adding reinforcing agent.The present application prepares cementitious material by synergistically disposing municipal solid waste incineration bottom ash, municipal solid waste incineration fly ash, electrolytic manganese residue and regenerated micro powder, realizes the unity of solid waste resource, almost zero dissolution of heavy metal, cementitious material high performance and low carbon.

This invention discloses an alkali-activated multi-source solid waste-based phase change thermal storage aggregate and its preparation, as well as a method for preparing phase change thermal storage concrete. The thermal storage aggregate comprises, from the inside out, a thermal storage core layer and a coating layer. The thermal storage core layer is composed of a porous alkali-activated geopolymer matrix and a phase change material loaded within the pores of the alkali-activated geopolymer matrix. The mass fractions of each raw material in the thermal storage core layer are: 70-80 parts blast furnace slag, 20-30 parts sludge ash, 5-15 parts bottom ash, 25-35 parts sodium silicate solution, 18-30 parts phase change material, 20-30 parts water, and 0.5-1 parts polycarboxylate superplasticizer. The coating layer is a dense alkali-activated geopolymer layer that encapsulates the thermal storage core layer. This phase change thermal storage aggregate exhibits good mechanical properties and excellent thermal storage capacity.

This invention discloses a solid waste-based low-carbon gel material and its preparation method. The material comprises, by mass percentage: 40%-60% highly active slag, 20%-35% graded bottom ash from a tower, 3%-8% pH-sensitive composite activator, 0.5%-2% nano-C-S-H seed crystals, 0.1%-1% modified cellulose nanocrystals, and 15%-25% water, with a controlled water-to-solid ratio of 0.15-0.28. The preparation method includes graded pretreatment of bottom ash, preparation and dispersion of nano-C-S-H seed crystals, preparation of the pH-sensitive composite activator, and mixing and slurry preparation. Graded treatment optimizes sulfate release, the pH-sensitive activator dynamically regulates alkalinity, and the nano-C-S-H seed crystals and modified cellulose nanocrystals induce ordered hydration and a multi-level porous structure, significantly improving compressive strength, impermeability, and low expansion rate. This invention effectively utilizes industrial solid waste, reduces energy consumption and carbon emissions, solves problems of uneven hydration and expansion cracking, and is suitable for green building and resource recycling.

The application discloses a design method of cementing material based on waste incineration bottom slag. The method comprises the following steps: giving a target fluidity of a cement paste; calculating a bottom slag grinding time and a bottom slag grinding particle replacement rate according to a fluidity model, mixing the bottom slag grinding particles with cement to prepare an initial cementing material; obtaining different age compressive strengths through experiments or calculation, and judging whether the different age compressive strengths of the cement paste doped with the initial cementing material meet design requirements; when the design requirements are not met, adjusting the bottom slag grinding time and the bottom slag grinding particle replacement rate until the design requirements are met, and finally obtaining a final cementing material. The method can simultaneously consider the synergistic effect of the particle size distribution characteristics of the bottom slag under different grinding times and the bottom slag replacement rate, is beneficial to avoiding insufficient grinding or excessive grinding, improves the rationality of parameter selection, reduces the blindness caused by relying on discrete test results for trial and error, and thus effectively improves the replacement rate and utilization rate of the bottom slag.

The present application relates to the technical field of flue gas purification system, and particularly relates to a two-stage dry method high-efficiency treatment system and method for waste incineration flue gas, which comprises: an incinerator, a first desulfurization and deacidification system, a second desulfurization and deacidification system, and an activated carbon circulation system, wherein the systems are connected in sequence, and further comprises: a first flue gas turbulent mixing pipeline arranged between the incinerator and the first desulfurization and deacidification system, a grinding assembly arranged at one side of a bottom ash bucket of the second bag-type dust collector, and a collision type airflow crushing assembly arranged at one side of an airflow classification assembly; the present application solves the problems of short contact time and uneven mixing of activated carbon and flue gas through a Venturi type pipeline structure, and integrates an activated carbon crushing, classification and desorption device, thereby overcoming the one-time injection consumption of the activated carbon in the prior art and the deficiency that the activated carbon cannot be recycled, significantly improving the utilization rate of the activated carbon and reducing the consumption of the activated carbon.

The application provides a coal-based solid waste cementing material for coal mine filling engineering, a preparation method and application. The preparation method comprises the following steps: mixing and grinding coal-based solid waste including fly ash 30-60 parts, furnace bottom ash 20-40 parts and gasification slag 20-30 parts 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 the coal-based solid waste; preparing a solid waste solution with a mass concentration of 20%-40% from the mixture A by using a solvent, and introducing carbonization gas into the solid waste solution to obtain an acidified solution; mixing and grinding desulfurization gypsum 30-60 parts, lime 30-50 parts and cement clinker 10-20 parts to obtain a mixture B, and adding the mixture B into the acidified solution to obtain the coal-based solid waste cementing material. The coal-based solid waste cementing material has a wider application scene, and can effectively reduce the cost of goaf filling and improve the coal-based solid waste consumption efficiency.

This invention relates to the field of boiler bottom ash treatment technology, and provides a boiler bottom ash treatment device that is easy to maintain. The device includes a housing, with two crushing rollers rotatably connected to the inner wall of the housing. These crushing rollers are driven by a motor and interlock. A turntable is connected to the rear end of one of the crushing rollers via a transmission assembly. A crushing drum is located at the bottom of the turntable and is fixedly connected to the inner wall of the housing. A second crushing roller is located on the inner wall of the crushing drum, and a connecting rod is fixedly connected to the middle of the second crushing roller. This multi-stage crushing structure achieves efficient treatment of boiler bottom ash, improving both the crushing effect and processing efficiency. The two interlocking crushing rollers, driven by the motor, perform initial crushing of the bottom ash. An inclined baffle guides the bottom ash to fall precisely into the crushing area. The crushing rollers drive the turntable to rotate via the transmission assembly, and the turntable uses a universal joint to drive the connecting rod and the second crushing roller to move within the crushing drum.

The application discloses a kind of peak-shaving unit bed material flexible adding system, belong to thermal power technology field, system contains bottom ash storehouse, drum screening machine, bucket elevator, limestone powder bin before furnace, switching tee valve, positive and negative rotation scraper conveyor, main bed feeding pipe, external bed feeding pipe, electric plugboard feeding valve, primary cold air sealing air pipe line, gas lock type feeder, hot secondary air sealing air pipe line, PLC control cabinet, material level meter, temperature transmitter, pressure transmitter and bin top purging device.Combination application drum screening machine, bucket elevator, limestone powder bin before furnace, switching tee valve, positive and negative rotation scraper conveyor are applied to CFB unit bed material addition in order of "screening→promotion→buffer / direct sending→two-way distribution".Realize multistage cooperation, old benefit and functional reuse of powder bin before furnace, two-way distribution based on positive and negative rotation scraper conveyor, multistage combined sealing for high-temperature positive pressure condition.

This invention relates to the recovery of coal residues—namely fly ash, bottom ash, and slag from metal smelting—for use in civil engineering, specifically in the construction of an eco-friendly road. The purpose of this invention is to recover solid waste resulting from coal combustion in thermal power plants—namely fly ash and bottom ash, on the one hand, and slag from metal smelting, on the other. After using these fine-grained solid wastes as adsorbents in the filtration of liquid effluents, a new type of solid waste is produced: filtration sludge, which we have recycled in the construction of an eco-friendly road.