19 results about "Pulverized fuel ash" patented technology

The utility model discloses a coal powder cleaning device for coal belt cleaning relates to cleaning device technical field. A coal powder cleaning device for coal belt cleaning, including belt conveying table and fixed base, belt conveying table fixed connection is at the top of fixed base, the ash cleaning structure is located on the fixed base, and the ash cleaning structure is including cleaning box, two support plates, two electric telescopic link, cleaning roller brush, driving motor and cleaning scraper, and the mechanical friction of cleaning roller brush removes the ash that sticks to the belt surface, and the cleaning scraper is scraped to remove the ash that remains the roller brush, effectively avoids secondary pollution, compared with single ash scraping plate cleaning, can handle big granular ash and adhered dust simultaneously, simultaneously, the negative pressure dust collection channel that exhaust fan, dust collection square pipe and dust collection mouth constitute can capture suspended fine dust in time, solve the problem that only rely on ash scraping plate cleaning leads to small granular dust to drift in traditional, realize the all -round cleaning to the ash on the belt surface.

This invention relates to the field of iron and steel metallurgical process optimization technology, and in particular to a method for evaluating the harmfulness of coal ash behavior. The method uses a coal ash behavior harmfulness index to evaluate the degree of harm of coal ash to blast furnace smelting. The harmfulness of coal ash behavior is defined as HICA = [w1 × (K2O + Na2O) + w2 × Fe2O3] × f(ST); where HICA is the coal ash harmfulness index, K2O is the mass percentage of K2O in the coal ash, Na2O is the mass percentage of Na2O in the coal ash, Fe2O3 is the mass percentage of Fe2O3 in the coal ash, w1 and w2 are weighting coefficients, satisfying w1 + w2 = 1 and w1 > w2, ST is the softening temperature of the coal ash, and f(ST) is a temperature correction function. This invention provides a comprehensive and accurate method for quantifying the harmfulness of coal ash to blast furnace smelting, forming a comprehensive indicator that can directly and comprehensively warn of the operational risks of coal ash to blast furnaces.

The application discloses a biomass gasification composite additive of red mud and coal ash, a preparation method and application thereof, and relates to the technical field of biomass gasification and industrial solid waste resource utilization. The raw material of the biomass gasification composite additive comprises a mineral component, the mineral component adopts high-iron red mud and / or high-aluminum coal ash, the oxides in the high-iron red mud include Fe2O3, Al2O3, SiO2 and CaO, and the mass fraction of Fe2O3 is 60-80%; the oxides in the high-aluminum coal ash include SiO2 and Al2O3, and the total mass fraction of SiO2 and Al2O3 is 80-95%; the high-iron red mud is mixed with the high-aluminum coal ash in a set ratio after drying treatment, and is sent into a gasification furnace gasification area together with corn stalks through a conveying device. The application not only effectively improves the ash melting characteristics in the biomass gasification process, but also realizes the resource utilization of the red mud and industrial solid wastes such as coal ash, and has good engineering application value.

The utility model belongs to the boiler fuel recovery technical field, concretely relates to a coal ash and coal powder device of recovery boiler, include: casing, the partition plate is fixed in the inside of casing, and the inside of casing is divided into first cavity, second cavity and third cavity, material collecting part sets up in the outer wall of casing, and material collecting part extends to the inside of casing, and the extension is located in first cavity and second cavity respectively, the air draft part sets up in the outside of casing, the adjusting part sets up in the third cavity of casing, and input end is connected with the air draft part, and output end extends and communicates to first cavity and second cavity respectively. The utility model solves the energy waste problem caused by the coal powder being treated as garbage on one hand, solves the problem of causing harm to human body and wasting manpower and material resources by manual cleaning on the other hand.

This utility model discloses a single-track liftable coal conveyor belt inspection system, relating to the field of coal conveyor belt inspection technology. It includes an inspection box and a traveling track. The inspection box is equipped with a traveling mechanism, and an electric telescopic rod is fixedly installed inside the inspection box. An inspection camera body is fixedly installed at the bottom of the electric telescopic rod. This single-track liftable coal conveyor belt inspection system, through the combined use of cleaning components and a cleaning structure, sprays cleaning fluid in a ring onto the inspection camera body, covering it with the cleaning fluid. Simultaneously, a drive motor drives a rotating rod to rotate, which in turn drives an external gear ring to rotate, causing a rubber scraper to rotate around the outside of the inspection camera body. The rubber scraper cleans away coal dust from the outside of the inspection camera body, ensuring clear images captured by the camera and improving inspection effectiveness.

This invention discloses an unattended integrated monitoring mechanism for coal mine machine rooms, relating to the field of coal mine machine room monitoring technology. It includes a mounting frame with an adjustment mechanism on top. A monitoring compartment is connected to the mounting frame via the adjustment mechanism. A monitoring device is fixedly connected inside the monitoring compartment. An intelligent control module is fixedly connected to one end of the monitoring device. A dustproof lens is fixedly fitted onto the side wall of the monitoring compartment, corresponding to the other end of the monitoring device. A first motor is fixedly connected to the inner wall of the monitoring compartment, and a rotating rod is fixedly connected to the output end of the first motor. A cleaning compartment is fixedly connected to the side wall of the monitoring compartment, and a cleaning mechanism is installed inside the cleaning compartment. This invention enables the cleaning of coal ash and other impurities adhering to the surface of the dustproof lens, avoiding impact on the clarity of the monitoring device and reducing the accuracy of monitoring.

This utility model relates to the field of bearing housing technology, specifically a spiral sealing bearing housing for a coal unloader. It includes a fixing assembly comprising a bearing housing and a fixing flange mounted on the surface of the bearing housing; an ash-blocking assembly comprising an upper ash-blocking ring, a lower ash-blocking ring connected to the upper ash-blocking ring, air inlets mounted on the surfaces of the upper and lower ash-blocking rings, a filter column mounted inside the air inlets, and a fan plate mounted inside the upper ash-blocking ring; and a rotating assembly that drives the ash-blocking assembly to rotate. The rotating ash-blocking assembly generates airflow through the internal fan plate, blowing gas outwards to remove coal ash. Simultaneously, the inclined air inlets reduce the direct impact of gas carrying coal ash on the filter column surface, preventing the filter column from being blocked by coal ash, thus forming an effective airflow channel to prevent coal ash from entering the bearing housing and ensuring the normal operation of the coal unloader.

The utility model discloses an air hammer vibration device for coal bunker, the utility model discloses be provided with the access hole, is convenient for the overhaul or replacement of hammer head, in addition, the access hole is shielded and exposed through the sleeve and sealing washer, avoid the outside coal dust into the shell inside, further, realize quick positioning through the reinforcing rib, hose joint and positioning stopper, on the basis that sleeve is pushed fast, guarantee that sleeve can accurately shield or expose access hole, improve sleeve operation efficiency, in addition, be provided with the reinforcing component in the access hole, be connected through the first threaded column and the first internal thread block of reinforcing rod, the second threaded column is connected with second internal thread block, improve access hole brightness, avoid the problem that the shell strength reduces because the access hole is opened, also can take down reinforcing rod after being separated through the thread, make the operation of overhauling or replacing hammer head more convenient.

This application belongs to the field of coal-fired power generation technology and discloses a method and system for optimizing coal blending based on coal ash characteristic analysis. The method includes: acquiring coal ash composition data of various coal samples to be blended; calculating the ash fusion point characteristic temperature and coking risk index of each coal sample based on the coal ash composition data using a pre-trained coking tendency prediction model; determining the target constraint condition for the blending ratio according to the target boiler coking risk threshold; using minimizing fuel cost or maximizing combustion efficiency as the objective function, and combining the ash fusion point characteristic temperature, coking risk index, and target constraint condition, solving the blending ratio that meets the coking risk control requirements through an optimization algorithm and outputting the result to guide actual operation; and monitoring boiler operating parameters in real time, updating the blending ratio when the coking tendency increases. This application can improve the rationality of coal blending, effectively reduce boiler coking risk, ensure stable combustion, and balance economy and safety.

The present application relates to the technical field of steel metallurgical process optimization, and particularly relates to a blast furnace coal injection coal powder comprehensive performance evaluation method and system based on combustion and reaction kinetics, comprising preparing a standard residual carbon sample, performing a combustion experiment and collecting data, calculating the dynamic burnout rate of the blast furnace coal injection coal powder, calculating the reactivity of the residual carbon of the blast furnace coal injection coal powder, calculating the coal ash behavior index for evaluating the harm degree of the coal ash to blast furnace smelting, establishing a model about the dynamic burnout rate, the reactivity of the residual carbon and the coal ash behavior index, and calculating the comprehensive performance index CPI for evaluating the blast furnace coal injection coal powder; the present application obtains key indexes such as the dynamic burnout rate and the residual carbon reactivity by simulating the extreme working condition of the blast furnace tuyere, breaks through the limitation of traditional indexes, deeply fuses and quantifies the physical properties (melting property) of the coal ash and the chemical harm of key chemical components, and forms a comprehensive index capable of directly and comprehensively warning the operation risk of the coal ash to the blast furnace.

The application relates to a coal conveying belt cleaning device which comprises a guide plate, a cleaning assembly is arranged at the upper end of the guide plate, installation assemblies are arranged at the two sides of the cleaning assembly respectively, the cleaning assembly comprises two symmetrically arranged first installation strips, an obliquely arranged second installation strip is fixedly connected to the upper end of the first installation strip, a first baffle is fixedly connected to the upper end of the second installation strip, a first motor is arranged on the first baffle, a brush roller is arranged on the output end of the first motor, a third installation strip is fixedly connected to the front end of the first installation strip, a rotating roller is arranged between the two third installation strips, and the rotating roller is rotatably connected with the third installation strips through installation shafts arranged at the centers of the two ends of the rotating roller, the application has the effect of thoroughly cleaning the bottom dust and sundries of the coal conveying belt, avoids belt deviation and aggravation of belt wear caused by long-term accumulation, and causes equipment failure, the middle part of the belt can be effectively cleaned, and the cleaned coal ash can be prevented from falling back into the inside of the belt machine.

The utility model discloses a kind of coal ash treatment devices of boiler management, it is related to boiler management technical field, including coal ash box, inlet, screening mechanism, cleaning mechanism, signal antenna and support column, three layers of screening plate are provided in coal ash box, screening mechanism includes screening motor, screening plate, guide rod and spring, cleaning mechanism includes servo motor, transmission part, tensioning wheel, fixed plate, cleaning plate, connecting plate and sensor, the utility model is equipped with screening mechanism, make coal ash complete efficient classification in gradually reducing screen hole, improve screening efficiency and reduce the risk of plugging, solve the problem of low traditional coal ash screening precision, poor efficiency, simultaneously, by setting up cleaning mechanism and sensor cooperation, realize the automatic response and discharge of large particle coal ash accumulation, avoid the operation inconvenience and too long downtime problem brought by artificial cleaning, realize the automation and continuous operation of coal ash treatment process, improve the stability and maintenance convenience of equipment operation.

This invention relates to the field of air pollution from coal conveying, and discloses a dust removal device for a coal conveyor, comprising a housing, adsorption plates symmetrically installed inside the housing, and a drive assembly installed outside the housing. Scraping structures driven by the drive assembly and used for cleaning the adsorption plates are symmetrically installed on both sides of the housing. This invention utilizes a scraper with an automatically adjustable angle. When descending, the scraper automatically adjusts to contact the adsorption plate to scrape away coal ash, and when ascending, it automatically adjusts to separate from the adsorption plate to avoid contact. This prevents residual coal ash that has not been completely scraped off and still has adsorption capacity from being pushed upwards during the ascent, thus avoiding secondary adhesion and clumping of coal ash on the adsorption plate, which would increase the difficulty of subsequent dust removal. Furthermore, it reduces the friction frequency between the scraper and the adsorption plate, ensuring that the scraper only contacts the adsorption plate during the scraping action, reducing frictional wear and slowing down the wear rate of the scraper.

The present disclosure provides a method for extracting soluble nutrients from biomass-coal mixed combustion ash and solidifying residues by hydrothermal method, belonging to the technical field of hydrothermal chemistry and solid waste resource utilization. The method comprises grinding the ash produced by mixing biomass and coal powder and adding deionized water to form a slurry; the slurry is subjected to hydrothermal reaction, the amorphous silicate and carbonate in the biomass ash will react with the alkali solution to generate soluble silicate and potassium salt, part of the silicon aluminum oxide in the coal ash is dissolved and re-polymerized, and heavy metal ions form hydroxide or silicate precipitate and are fixed in the solid phase; the solid phase material is filtered or centrifuged to obtain a hydrothermal extract and a solid residue. The present disclosure utilizes the hydrothermal reaction environment to selectively dissolve the soluble nutrients such as potassium and phosphorus in the biomass ash, and at the same time converts the heavy metals and silicon aluminum components in the coal ash into stable and inert geopolymer materials, thereby realizing the purification of nutrients and detoxification of residues.

The application discloses a high-aluminum composite conductive grounding material for a pressurized water reactor nuclear power unit and a preparation method thereof. The grounding material comprises cement 12-35%, boiler coal ash 25-45%, aluminum powder 10-22%, graphite powder 8-15%, water 12-18% and sodium polyphosphate 1-4% in percentage by mass. The composite conductive filler composed of aluminum powder and graphite powder is added as the conductive phase, and the boiler coal ash is used as one of the components to solve the problem of treatment of combustion products of the coal-fired boiler and reduce environmental pollution. The high-aluminum composite conductive grounding material for the pressurized water reactor nuclear power unit has low resistivity, high compressive strength, excellent corrosion resistance, simple production process, flexible operation, low cost and wide applicability.

This invention relates to the field of adsorbent technology, and in particular to a composite structure adsorbent for solidifying heavy metals in solid waste thermal treatment and its preparation method. The composite structure adsorbent of this invention uses spherical ultrafine fly ash as the core and zeolite as the outer shell; the zeolite is obtained by hydrothermal reaction of broken-shell ultrafine fly ash after alkali melting. This invention combines the high-temperature resistance of fly ash, the physical adsorption of the outer shell zeolite material, and the chemical solidification effect of the core high-volcanic ash material to successfully prepare a composite structure adsorbent material that can efficiently solidify heavy metals under high-temperature conditions. This improves the solidification rate of heavy metals under solid waste thermal treatment conditions such as cement kiln co-processing and incinerators, ensuring the environmental safety of solid waste thermal treatment processes.

The application relates to the technical field of coal ash filtration, and discloses a power plant coal conveying pipeline particle filtration and recovery device, which comprises a front pipeline, the inner circumferential surface of the front pipeline is provided with a rolling filter screen, a rolling filter screen capable of rotating is additionally arranged in a coal conveying pipeline filtration structure and is matched with a top fan for blowing, the purpose is to solve the problems that coal cinder is easy to be hardened and difficult to be filtered, the filtration problem of sticky and wet coal cinder can be effectively solved, when the filter screen rotates, large-particle coal cinder is thrown to the periphery by centrifugal force, at this time, the directional constant-speed airflow of the upper half circle blown by the fan scatters the caked coal cinder, dust and particles existing in the coal mine are filtered, the combustion of the coal mine is more sufficient, the rolling filter screen rotation cooperates with the wind force to prevent the caked coal cinder from adhering to the filter screen and causing the mesh hole to be blocked, the frequency of manual cleaning is reduced, the device life can be prolonged, and the fuel loss can be reduced.