139 results about "Coal particle" patented technology

The invention relates to a boiler flue gas temperature dynamic compensation method based on CFD-reinforcement learning, and belongs to the technical field of boiler operation control. The method comprises the steps that boiler operation parameters and flue gas temperature data are collected in real time, a multi-scale coupling three-dimensional CFD model is constructed, a macroscopic gas-solid two-phase flow-combustion reaction-radiation heat transfer coupling algorithm and a microcosmic pulverized coal particle combustion dynamics algorithm are fused, and hearth and flue temperature distribution is simulated and output; building a CFD-reinforcement learning fusion agent based on a CFD model, taking similar working condition agent parameters as initial values, combining historical and virtual data staged training, and reinforcing the weight of a key temperature measurement point through a focusing regulation and control strategy; an echo state network-predictive control collaborative algorithm is adopted, real-time data are input to obtain an initial adjustment amount, and after security constraint optimization, a compensation execution mechanism is controlled to act. The flue gas temperature is accurately and dynamically compensated, the adaptability to complex working conditions is improved, and equipment safety and operation efficiency are both considered.

The invention relates to the technical field of computer fluid dynamics, in particular to a coke oven carbonization chamber numerical simulation model based on a CPFD method, which comprises the following steps: carrying out structural grid division to generate a computational domain grid for solving a carbonization process; setting physical property parameters, boundary conditions, initial conditions and chemical reaction kinetic parameters of the coal particles and the gas phase; a CPFD multiphase coupling model is constructed; solving the CPFD multiphase coupling model to obtain dynamic evolution data of pyrolysis gas flow, coupling heat transfer and chemical reaction processes in the carbonization chamber; and outputting simulation results of a temperature field, a pressure field, a gas component concentration field and coal pyrolysis product distribution in the carbonization chamber. The method has the advantages that the particle swarm is regarded as a quasi-continuous medium for statistical description, and the optimal balance is ingeniously obtained between the calculation efficiency and the calculation precision, so that full-size and high-fidelity numerical simulation of dense gas-solid two-phase flow and reaction process involving millions of particles in an industrial-scale coke oven carbonization chamber becomes possible.

The utility model discloses a high-quality fly ash efficient winnowing device which comprises a winnowing box, an air inlet is formed in one end of the winnowing box, two sets of angle-adjustable baffles are arranged in an inner cavity of the winnowing box in the air inlet direction, each set of baffles is movably connected with a set of first collecting pieces, and the heights of the two sets of baffles are gradually increased. The angle-adjustable baffle can be flexibly matched with pulverized coal with different sources and different particle distributions, particles with different particle sizes can be effectively separated by adjusting the angle of the baffle when the particle size distribution of the pulverized coal particles changes, the winnowing efficiency is greatly improved, and the winnowing efficiency is improved. By accurately controlling the angle of the baffle, the winnowing process can be more stable, it is guaranteed that the quality of collected fly ash is uniform, the production requirement of high-quality fly ash is met, and meanwhile the adaptability of the winnowing device to different wind forces is enhanced.

The invention provides a microwave pulse electric field vibration synergistic fracturing and permeability increasing gas extraction promoting device and method, and relates to the technical field of low-permeability coal seam fracturing and permeability increasing. According to the method, multi-physical field coupling synergistic interaction is achieved, and the fracturing efficiency and range are greatly improved. According to the invention, deep collaboration of multiple physical fields is realized through a specific time sequence and energy ratio. The thermal stress generated by microwave preheating enables a large number of microcracks to be generated in the coal body and soften the coal quality, and the resistivity and the medium strength of the coal body are reduced. In the state, the pulsed electric field with lower voltage can preferentially and effectively break down and expand the fracture network along the micro-fracture path; meanwhile, high-frequency mechanical vibration not only efficiently transmits energy to the tip of the fracture to generate stress concentration to promote extension of the fracture, but also disturbs coal particles to promote gas desorption. Through three-field cooperation, cracks can be more efficiently initiated, expanded and communicated in a three-dimensional space, a three-dimensional complex crack network far beyond the action range of a single technology is formed, and the overall permeability of a coal seam is remarkably improved.

The disclosure provides a coal conveying control system and method for a thermal power plant. The system includes: a model prediction module, used for building an operating load prediction model, and obtaining a boiler operating load optimal value; a load calculation module, used for drawing an operating load difference value curve, and determining a boiler coal consumption change amount; a speed control module, used for determining a coal conveying amount of a coal conveying system, and controlling operating speed of a coal conveying belt according to the coal conveying amount; a quality calculation module, used for calculating boiler operating efficiency, and determining a coal quality parameter according to the boiler operating efficiency; a fineness control module, used for determining a coal particle parameter, setting target coal particle fineness according to the coal particle parameter, and controlling a screening and crushing device according to the target coal particle fineness.

The invention discloses a coal crushing and screening equipment load adaptive cooperative control method, and relates to the field of coal processing, and the method comprises the steps: forming a coal database based on historical crushing data; the target coal type, the actual crushing coefficient and the actual quality are obtained; identifying to obtain a first crushing coefficient of the first sample state and a second crushing coefficient of the second sample state; constructing a crushing action function based on the test data; generating target power during actual crushing; and verifying the target power, and when the target power has the risk of insufficient crushing, correcting the target power of coal crushing to obtain a target corrected power. According to the method, the coal database is formed, the coal is identified, the crushing action function is constructed, the target power during actual crushing is generated, the target power is verified, the power during coal crushing is specifically set, and the power is corrected, so that the crushed coal particles can meet the production requirements.

This invention relates to the field of pulverized coal conveying and dust removal technology, specifically to a pulverized coal dust removal method, comprising: S1: Constructing a dust removal system: setting up a dust cover on a conveyor belt, setting up a pressure-reducing chamber on the dust cover, installing wear-resistant baffles at the bottom of the dust cover, and installing a dust curtain inside the dust cover; installing a dust collector at the top of the dust cover; S2: Coal conveying and primary dust removal: starting the conveyor belt to transport coal, the coal falls onto the conveyor belt, and the generated dust-laden gas forms a local high-pressure zone under the obstruction of the dust curtain, causing a portion of the dust-laden gas to undergo primary filtration through the filter components on the pressure-reducing chamber; S3: Secondary dust removal: the remaining dust-laden gas in the dust cover is sucked into the dust collector, the dust-laden gas enters below the liquid surface of the dust collector, causing the pulverized coal particles to settle and form coal slurry, which is then transported outside the dust collector, and the purified gas is discharged through the outlet. This method achieves closed-loop control of the entire process from source dust suppression to end-of-pipe treatment through two-stage synergistic dust removal, improving the dust removal effect.

The utility model provides a coal bucket anti-blocking structure of a coal conveying system, which relates to the field of coal conveying systems and comprises a coal bucket body, the coal bucket body is divided into a plurality of inclined sections and vertical sections which are alternately arranged, and a vibration component is mounted on the outer side of the coal bucket body. The vibration assembly comprises a plurality of vibration balls, a gear ring driving the vibration balls to rotate and a plurality of vibration plates used for transmitting vibration, the vibration balls make contact with the vibration plates in the rotating process, and the vibration plates extend to the inner side of the coal bucket body. The friction force superposition effect caused by the continuous conical section can be reduced, so that the blocking phenomenon of coal particles is effectively reduced, the vibration plate is knocked by the vibration ball, the vibration plate and the coal bucket body are continuously vibrated, retention of the coal particles on the inner wall of the coal bucket due to extrusion friction can be effectively reduced, blocking is prevented, and the service life of the coal bucket is prolonged. And continuous and coherent coal conveying operation is ensured.

The present application provides an anti-blocking coke making system and method, the system comprising: a coke making furnace, a vibrating screen machine, a cooling machine and a conveying mechanism. The method comprises: raw coal particles enter the coke making furnace, and pass through a pre-carbonization section, a carbonization section and an activation section in turn, wherein aluminum oxide balls are introduced into the carbonization section to mix and heat with carbonization material, and the carbonization material is activated in the activation section to obtain active coke, which is discharged from a discharge port together with the aluminum oxide balls; the active coke and the aluminum oxide balls are separated in the vibrating screen machine, wherein the active coke is cooled in the cooling machine, and the aluminum oxide balls are sent back to the carbonization section of the coke making furnace by the conveying mechanism for recycling. The present application uses aluminum oxide balls as catalysts to decompose heavy tar with high viscosity into light tar with low viscosity, preventing the blocking problem caused by the mixture and agglomeration of tar and dust, and the catalysts can be recycled.

This utility model discloses an energy-saving coal particle conveying system based on circulating waste heat air, relating to the field of coal particle conveying technology. It includes a furnace, a screw conveyor, a motor, a heating tank, and an auger. A preheating mechanism is provided on the side of the furnace, comprising a heating tank, an air duct, and a fan. The heating tank is connected to the side of the air duct, and the air duct is fixedly connected to the top of the fan. This structure integrates waste heat collection with coal particle conveying, shortening the waste heat transmission path and reducing heat loss. Simultaneously, the fan delivers waste heat air to the heating tank through the air duct, forming a directional circulation channel, ensuring that the hot air acts evenly on the coal particle conveying path, improving pre-drying efficiency. A blower is configured in the bottom combustion chamber below the furnace, which can precisely control the amount of combustion air input, allowing for more complete fuel combustion and providing a stable heat source for the waste heat air system.

The application discloses a kind of concentrated pool coal-water interface video image recognition device and method, comprising: sequentially connected concentrated pool fixed module, mobile module, image acquisition module and image processing module;The mobile module uses movable guide rail, under the guidance of the concentrated pool fixed module, the video information in the concentrated pool is collected by the image acquisition module, and based on image processing module, the video information is analyzed and processed, the number of coal particles is obtained, and then the coal-water interface is identified.The application has the characteristics of non-contact and intelligence by image processing method, with the help of the relatively mature image processing technology and data transmission technology, the dependence on hardware such as sensor is lower, and it is easy to upgrade and transform.

The invention discloses a pebble coal sorting device. The pebble coal sorting device comprises a bin body, a sorting assembly and a dust removal assembly, the sorting assembly obliquely penetrates through the bin body and is provided with a feeding port, a discharging port and a sorting channel, the feeding port and the discharging port are located outside the bin body, the sorting channel is located in the bin body, the feeding port is higher than the discharging port, and a sorting grating plate is arranged at the bottom of the sorting channel. The separation grating plate is arranged in the bin body so that coal particles in pebble coal can fall into the bin body through holes of the separation grating plate, an opening is formed in the top of the separation channel so that coal dust generated by flowing of the pebble coal in the separation channel can flow into the bin body through the opening, and the dust removal assembly is connected with the bin body and used for pumping out the coal dust in the bin body and conducting purification treatment on the coal dust. According to the pebble coal sorting device, pebble coal can be effectively sorted, and the requirements for cleanness and environmental protection are met.

The application discloses a kind of applied to full-automatic water washing device of coal conveying system in thermal power plant, it is related to coal washing technical field, including frame assembly, conveying assembly and floatation component;The frame assembly includes washing bin and vibrating screening bin;The vibrating screening bin is fixed on washing bin, and the washing bin is rectangular parallelepiped with cavity inside;The conveying assembly is arranged in washing bin;The floatation component is arranged in washing bin, and floatation component is located at one side of conveying assembly;It also includes washing and selecting component, and the washing and selecting component is arranged in washing bin, and the washing and selecting component is located at the lower side of floatation component, and washing and selecting component is located at one side of conveying assembly;It can be realized by changing the installation mode of washing and selecting frame, and adding the baffle of blocking water and coal simultaneously, so that water can gather together, it is convenient to carry out again screening for coal after primary screening, prevent fine coal particles from flowing out with water, improve the collection rate of fine coal particles.

The machine vision-based intelligent coal selection process coal particle size analysis method and system of the application relates to the technical field of machine vision, obtains scale images by shooting the coal sample particles to be measured from different perspectives; the scale image pixels are segmented, the optimal scale is calculated according to the local gradient amplitude and the local direction of the pixel points, the scale image is segmented into initial regions, the region area is adjusted, and the pixel points are updated; the known coal samples and the particle size values thereof are collected, the scale images and the morphological characteristics are obtained, the particle volume of the known coal samples is obtained, and a particle size estimation model is constructed; for the coal sample particles to be measured, the particle size value is predicted through the particle size estimation model, the image quality index is calculated, the weight of different particle size values is calculated, and the final particle size value of the coal sample particles to be measured is obtained; the particle size value range is obtained according to the final particle size value, the particle size interval is divided, the number of the coal sample particles to be measured is counted, the mass percentage of each particle size interval is calculated, the particle size distribution is obtained, and the precision of the particle size analysis is improved.

The invention relates to the technical field of coal feeders, and discloses a pneumatic type coal feeder outlet cleaning device which comprises a coal feeder body and further comprises a coal inlet pipe arranged at the top of the coal feeder body, a push plate is slidably installed at the bottom of the coal feeder body, and a plurality of adjusting through holes are formed in the end, away from the coal inlet pipe, of the push plate. And a dredging film is fixedly mounted in the adjusting through hole. An adjusting shaft and a worm are driven by a servo motor to rotate, and a plurality of limiting rings are driven to rotate in the reciprocating sliding process of a push plate so as to change the stretchable amount of dredging films, so that the extension heights of convex parts of a plurality of dredging films at the same time are different, and the coal particles are more effectively dispersed; and the situation that falling-out of upper-layer coal particles is affected due to the fact that the protruding part of the dredging film is too high can be avoided, it is guaranteed that the coal particles can flow smoothly in the conveying process, the dredging efficiency is improved, and the stability and working efficiency of the whole system are guaranteed.

The utility model discloses a kind of crushing devices for coal mining, including crushing box, the top of crushing box is equipped with feed hopper, and the bottom of crushing box is equipped with discharge hopper, and the upper left side of crushing box is equipped with motor, the upper inside of crushing box is symmetrically equipped with crushing roller;Further include:The left side bolt connection of crushing box has pneumatic cylinder, the inside of crushing box is connected with filter screen below crushing roller, and the left and right sides of filter screen lower surface are all fixed with adhering block.The coal mining crushing device, using double crushing roller relative rotation is crushed to coal block, and the particle size of coal particle after crushing is screened by filter screen, ensure that product granularity is uniform, simultaneously, transmission rod drives cam rotation, realizes reciprocating motion by extruding adhering block under the cooperation of sliding block and first spring, vibration effect is generated, effectively prevent screen hole blockage, guarantee screening efficiency.

The application discloses an interface activity buffer additive and a pulverized coal deliming method, and a gradient proportioning composite acid system of nitric acid-hydrochloric acid-hydrofluoric acid is used in cooperation with an interface activity buffer additive (containing a specific zwitterionic betaine derivative and a citric acid buffer pair) to construct a H+ concentration gradient microenvironment on the surface of coal particles, target dissolution of ash minerals in a high concentration area, and protection of coal matrix in a low concentration area. The deliming rate is greater than 98%, acid consumption is reduced by 35%, and waste liquid is easy to handle up to the standard. The application solves the industry problems of poor selectivity, great coal damage and heavy secondary pollution of traditional pickling, and provides key technical support for efficient and clean utilization of high-ash coal.

The present application relates to the technical field of coal conveying, in particular to a hanging belt conveyor for coal mine conveying, comprising a belt, the two sides of the belt being fixedly connected with supports, the present application is provided with a screening assembly inside the shell, during the sampling process, the motor starts to control the gradually opening of the opening and closing plate, so that the size of the coal entering the collection chamber inside is increased, at this time, the screening assembly screens, so that the collection bucket collects coal of each size with gradually increasing size each time, and too much coal of the same size is not collected, therefore, the design of the collection bucket will gradually open with the opening and closing plate and be screened by the screening assembly, so that the collection bucket can collect all the coal particles of various particle sizes on the belt, so that the detection assembly can detect coal of various sizes, and the detection accuracy is ensured.

The invention provides a composite layered sintered ore and a preparation method and system.The preparation method comprises the steps that lump coal is crushed and screened, and lump coal particles are obtained; uniformly mixing an iron-containing raw material, a CaO-containing flux and fuel to obtain an outer-layer mixed material; feeding the lump coal particles into a disc pelletizer, and spraying atomized water to the surfaces of the lump coal particles until the surfaces of the lump coal particles are wet; spraying calcium ferrite to the surfaces of the lump coal particles; the outer-layer mixed material is added into a disc pelletizer, atomized water is continuously sprayed for pelletizing, screening is conducted after pelletizing is finished, and a green pellet mixed material is obtained; conveying the green pellet mixture to a sintering machine, igniting the green pellet mixture, and sintering the green pellet mixture under the condition of injecting hydrogen-rich gas to obtain high-temperature sintered ore; hydrogen is adopted as a cooling agent to cool the high-temperature sintered ore, and pre-reduction of the high-temperature sintered ore is achieved in the cooling process. According to the invention, the composite layered sintered ore has high strength and air permeability, and the coke ratio can be reduced while the lump coal ratio in the ironmaking process is increased.

The utility model relates to the technical field of coal mine transportation, in particular to a material arrangement baffle device of a power plant coal conveying belt conveyor, which comprises a belt and a dust hood, a leakage-proof mechanism is arranged on the belt, the leakage-proof mechanism comprises a baffle and a fixing frame, one side surface of the baffle is in contact with an evacuation ruler, a dredging mechanism is arranged on the dust hood, and the evacuation ruler is in contact with the dust hood. And the dredging mechanism comprises a dredging ruler and an arc-shaped plate. The fixing frame is mainly used for preventing a coal pile from turning outwards into a gap of the conveying belt, on one hand, waste of the coal pile is avoided, on the other hand, the trouble of manually cleaning coal cinder in the gap of the conveying belt is also avoided, a dredging mechanism is arranged, and a dredging ruler can disperse a structure where pulverized coal or coal particles are bonded compactly, so that the coal dust or the coal particles are prevented from being damaged. In the process that the dispersed coal piles pass through the arc-shaped plates, the towering coal piles collapse due to the semi-arc design of the arc-shaped plates, and the number of the towering coal piles is sequentially reduced along with the semi-arc design of the arc-shaped plates, so that the problem that the accumulated coal is excessively accumulated is avoided.

This invention provides a novel double-inner-cone medium-speed coal mill pulverized coal separator, belonging to the field of thermal power generation technology. It includes a shell, inside which is an inner cone. A pulverized coal distributor, a coal drop pipe, a pulverized coal outlet pipe, and a rotating shaft are inserted into the upper surface of the shell. This invention designs the pulverized coal particles to encounter the inner side of the inner cone during their downward rotation. Because the inner cone is slit, it collects coarser pulverized coal particles, resulting in better separation of qualified pulverized coal. The collected particles fall to the bottom of the inner cone and the shell cone, and are returned to the coal mill for re-grinding via an airlock. The slit-type inner cone collects coarser pulverized coal particles, preventing them from being carried out of the coal powder conveying pipe by the gas, thus improving the uniformity of the pulverized coal and effectively reducing backmixing, resulting in finer pulverized coal particles at the separator outlet.

The application discloses a coal-tar pitch-based surfactant and a preparation method and application thereof, and belongs to the technical field of surfactants. The coal-tar pitch-based surfactant is prepared by the following steps: taking coal-tar pitch as raw material, removing impurities, introducing chlorosulfonic acid groups on benzene rings in the molecular structure of the coal-tar pitch through a sulfonylation reaction of chlorosulfonic acid and phosphorus oxychloride, and then introducing a hydrophilic chain to the edge of the molecular structure of the coal-tar pitch through an esterification reaction between the chlorosulfonic acid groups and terminal hydroxyl groups on the hydrophilic chain to endow the coal-tar pitch with surface activity, so that the coal-tar pitch-based surfactant containing both a hydrophobic aromatic ring and a hydrophilic long chain is obtained. The central polycyclic aromatic ring structure of the coal-tar pitch-based surfactant is highly similar to the surface structure of Shenhua coal, and the coal-tar pitch-based surfactant and the Shenhua coal have strong pi-pi interaction and hydrophobic interaction, high adsorption fastness, and a long hydrophilic chain grafted at the edge, which can effectively provide steric hindrance and form a physical barrier between adjacent coal particles to effectively prevent the coal particles from gathering, so that the coal water slurry has low viscosity, good dispersibility and stability.

The invention provides a composite layered pellet and a preparation method and system.The preparation method comprises the steps that lump coal is crushed and screened, and lump coal particles with the particle size ranging from 10 mm to 15 mm are selected; uniformly mixing the dried iron ore powder with a pelletizing agent to obtain an outer-layer mixed material; feeding the lump coal particles into a disc pelletizer, and spraying atomized water to the surfaces of the lump coal particles until the surfaces of the lump coal particles are wet; spraying calcium ferrite to the surfaces of the lump coal particles; the outer-layer mixed material is added into a disc pelletizer, atomized water is continuously sprayed for pelletizing, screening is conducted after pelletizing is finished, and green pellets with the size being 25-30 mm are obtained; roasting the green pellets in an oxidizing atmosphere to obtain high-temperature pellets; and hydrogen is adopted as a cooling agent to cool the high-temperature pellets, and pre-reduction of the high-temperature pellets is achieved in the cooling process. According to the invention, the composite layered pellet has high strength and air permeability, and the coke ratio can be reduced while the lump coal ratio in the ironmaking process is increased.

An unblocking and anti-clogging apparatus for a coal drop chute, relating to the technical field of coal conveying in power plants, and comprising: a connecting unit (100), comprising a fixed top frame (101) and swing frames (102) symmetrically mounted at the bottom of the fixed top frame, wherein the fixed top frame is fixed to a coal drop opening of a coal drop chute; a driving unit (200), comprising motors (201) and actuating rods (202), wherein the motors are symmetrically fixed to the outer wall of the coal drop chute, and each actuating rod has one end connected to a corresponding motor output shaft and the other end connected to the corresponding swing frame; and an unblocking unit (300), comprising coal agitating plates (301) and a coal pushing member (302), wherein the coal agitating plates are arranged between the swing frames and are connected to the actuating rods, and the coal pushing member is movably mounted at the bottom end of the swing frames. The unblocking and anti-clogging apparatus for the coal drop chute solves the existing problem that inverted Y-type coal drop chutes are prone to clogging due to excessive coal moisture or non‑uniform coal particle size.

The invention relates to the technical field of coal mine separation, and discloses a defoaming device for coal mine preparation, which comprises a flotation scavenging machine and further comprises a treatment mechanism and is characterized in that the treatment mechanism is arranged on the flotation scavenging machine, the treatment mechanism comprises an annular carrier fixedly connected to the flotation scavenging machine, and a baffle is fixedly connected to the inner wall of the annular carrier; the surface of the annular carrier is fixedly connected with an air cylinder, the output end of the air cylinder is fixedly connected with a fixed block, the defoaming piece is arranged on the annular carrier, and the defoaming piece comprises a rotary drum rotationally connected to the annular carrier. Through the arrangement of the treatment mechanism, according to the mode of'sucking and squeezing 'in the scavenging link, the scraping plate conducts continuous bubble scraping treatment in the flotation scavenging machine, after the scraping plate reaches the storage upper limit, the scraping plate faces the baffle and is combined into a discharging groove opening, residual fine-grain clean coal after mainstream flotation can be recycled to the maximum extent, and the flotation efficiency is improved while work of the flotation scavenging machine is not affected. The process from foam scraping, conveying to foam removing is achieved, and production continuity and stability are guaranteed.

The invention relates to the technical field of coal washing and processing, and discloses an ultrasonic enhanced flotation type middling coal upgrading device which comprises an upgrading barrel, and a pretreatment module, a flotation separation module and a clean coal collection module which are sequentially arranged in the upgrading barrel from bottom to top, the pretreatment module comprises an ultrasonic unit, a screen type guide plate and a spoiler which are mounted on the upgrading barrel; according to the ultrasonic enhanced flotation type middling coal washing and upgrading device, through the synergistic effect of classified screening and ultrasonic precise cavitation of the pretreatment module, a screen type guide plate and a grating screen can separate coarse particle impurities with the diameter larger than 1 mm in advance, follow-up equipment is prevented from being blocked, meanwhile, an ultrasonic transducer is arranged in a segmented and partitioned mode and can be rotationally adjusted by 0-45 degrees, and the quality of the middling coal is improved. The cavitation effect accurately acts on a coal slurry core flow field, coal particle aggregates are efficiently cracked, the adhesion requirements of coal particles with different particle sizes are met, the bubble disperser is matched to prevent bubble aggregation, the collision adhesion probability of the coal particles and bubbles is greatly improved, and the fine coal recovery rate is remarkably improved.

The application discloses a belt bottom dredging and loading crawling ladder device, which comprises a walking mechanism, a feeding mechanism, a transfer mechanism and a dredging mechanism. In the scheme, the pulverized coal particles under the belt are collected in the feeding mechanism by the dredging mechanism, and are transferred to the transfer mechanism by the feeding mechanism, and the transfer mechanism transfers the pulverized coal particles to a fourth position for treatment, and the walking mechanism can transfer the aforementioned components to different positions of the belt conveyor, thereby comprehensively cleaning the bottom of the belt conveyor.

The invention relates to the technical field of energy conversion and environment, in particular to a coal hydrogen-rich synthesis gas and raw coal upgrading system and method based on iron ore particles. The system comprises: a chemical looping gasification unit, which is used for producing hydrogen-rich gas through a reaction of an iron ore oxygen carrier in an oxidation state with clean coal in a reactor; wherein the iron ore oxygen carrier in the oxidation state plays roles in catalytic oxidation and synthesis gas quality adjustment, and after the iron ore oxygen carrier is changed into the reduction state, the iron ore oxygen carrier is regenerated into the oxidation state through oxidation reaction with air in the reactor; the inactivated oxygen carrier treatment unit is used for crushing and screening the inactivated oxygen carrier in the reactor to obtain a dense medium; and the separation fluidized bed unit is used for separating the coal particles through a two-phase flow formed by fluidizing gas and a dense medium so as to separate clean coal and tailings. According to the method, full-process and efficient utilization of the cheap iron ore particles is achieved, and quality improvement and ash reduction of the coal are achieved while the gasification efficiency is improved.

This invention belongs to the technical field of blast furnace pulverized coal injection equipment, particularly the safety injection component for high-volatile bituminous coal and the blast furnace pulverized coal injection equipment and its usage method. Addressing the problems of low combustion rate, substandard pulverized coal particle size, and susceptibility to moisture absorption during pulverized coal storage, this component features an insulation sleeve on the outer wall of the injection pipe, preheating the pulverized coal with blast furnace exhaust gas to reduce heating energy consumption and promote rapid ignition. A spiral plate inside the injection pipe enhances the mixing of pulverized coal and nitrogen, and an electric push rod at the top controls a bending plate to adjust the pulverized coal injection angle, strengthening airflow disturbance and increasing the contact area between pulverized coal and oxygen. The blast furnace pulverized coal injection equipment includes a grinding cylinder and a storage box. The grinding cylinder has a multi-stage grinding structure, with a rotating shaft driving a grinding wheel to perform primary and secondary grinding of the pulverized coal, ensuring uniform particle size. The storage box utilizes exhaust gas heat to dry the pulverized coal and suppress spontaneous combustion. By optimizing the preheating, grinding, injection, and storage processes, the equipment improves the pulverized coal combustion rate and utilization rate, ensuring production safety.

This invention discloses a universal detection method applicable to coal with multiple particle sizes. It includes: first, acquiring a coal sample set under a target scenario, along with the corresponding near-infrared diffuse reflectance spectra and analytical properties of each coal sample, where all coal samples in the set have the same particle size; second, determining the property analysis model and reference wavelength based on the near-infrared diffuse reflectance spectra and analytical properties of each coal sample in the set; finally, acquiring the near-infrared diffuse reflectance spectrum of an unknown coal sample, preprocessing the spectrum using the reference wavelength to obtain the corresponding standardized spectrum, and inputting it into the property analysis model, which then outputs the analytical properties of the unknown coal sample. The method proposed in this invention is applicable to coal particle sizes ranging from ultrafine powder, medium particles, and coarse particles to in-situ rough surfaces and in-situ smooth surfaces, significantly eliminating spectral scattering effects caused by the physical state of the sample and improving the accuracy of quantitative coal quality analysis.