48 results about "Clean coal" 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.

The utility model relates to a track coal turning and cleaning vehicle belongs to coal cleaning equipment technical field, including frame, the wheel of rotating to be established in the bottom of frame a plurality, and install in the coal cleaning mechanism of frame, the coal cleaning mechanism includes the first coal turning plate and second coal turning plate of fixedly established in the frame and the inclination, the first coal turning plate lower edge is flush with the track surface, the length size of second coal turning plate is greater than the length size of first coal turning plate, the lower edge of second coal turning plate extends to the internal space of both sides track, the utility model discloses can drive coal cleaning vehicle to move through power mechanism, first coal turning plate moves first and turns out the coal in the track portion, to reduce the coal turning bearing of second coal turning plate, second coal turning plate can turn out the coal in the track and discharge track after moving, cooperate with the track surface and wipe clean mechanism and wipe the track, can turn coal and clean coal to the track, prevent the derailment of subsequent vehicle due to track coal, improve the safety performance of track.

The application discloses a dry dedusting method for coal gas of a pressurized gasification furnace, and belongs to the technical field of coal gas dedusting. The dry dedusting system of the application is composed of a filter deduster, a pulse ash cleaning system, a control system and a lock-gas ash discharging system, and is used for purifying high-temperature and high-pressure raw coal gas at the outlet of the pressurized gasification furnace. After the coal gas is filtered by the filter element of the filter deduster, dust is intercepted on the outer surface of the filter element, and the clean coal gas is discharged from the inner cavity side. The pulse ash cleaning system realizes back-blowing ash cleaning by inputting pulse gas into the filter element without interrupting the filtering operation. The control system adopts a double-criterion ash cleaning triggering strategy. The dust collected by the filter deduster can be transported in high and low pressure dense phases by the lock-gas ash discharging system through the alternate change of the pressure of the lock-gas system under the condition of maintaining the operating pressure of the dedusting system. The application realizes stable and efficient back-blowing ash cleaning, prolongs the service life of the filter element, ensures that the dust content of the clean coal gas continuously meets the standard, simplifies the technological process and fully retains the waste heat of the coal gas.

This application relates to the field of clean coal combustion, and in particular to an efficient circulating fluidized bed coal-fired boiler air distribution system, including an air chamber for supplying air to the combustion chamber, an air distribution plate located near the combustion chamber opening, air caps located on the air distribution plate for supplying air from the air chamber into the combustion chamber, and heat pipes arranged in the combustion chamber to absorb heat. The air chamber is equipped with a flow equalization plate, which has several perforations that are densely distributed throughout, so that the airflow in the air chamber is first processed by the flow equalization plate for uniform distribution, so that the airflow on the air distribution plate can be kept uniform, and the air volume delivered by the air caps on the air distribution plate is relatively consistent, which helps to ensure that the air volume is relatively consistent throughout the combustion chamber and ensures that the pulverized coal combustion is sufficient and uniform.

This invention discloses a low-temperature resistant composite flotation reagent for coal preparation and its preparation method, specifically relating to the field of flotation technology. The reagent is formed by emulsification of a composite collector, a composite frother, and an aqueous phase. The composite collector contains kerosene, n-dodecane, oleic acid, dimer acid, surfactant components, and low-temperature stabilizing components. The composite frother contains terpineol, pine oil, sec-octanol, and sodium α-olefin sulfonate, etc. Through compounding and synergistic effects, high-speed shear emulsification, and high-pressure homogenization, the obtained reagent exhibits good dispersibility and stability at -5 to 15°C, and can improve the flotation efficiency, clean coal yield, and combustible gas recovery rate of fine coal slime and high-ash, difficult-to-separate coal slime without heating the coal slurry.

This invention relates to the field of tailings flotation technology and discloses a high-value clean coal recovery system based on multi-stage flotation and synergistic control of mid-gangue magnetic tailings. The system includes a classification pretreatment unit employing a high-efficiency thickening and classifying hydrocyclone, a feed pump, and a pressure transmitter to separate mid-gangue magnetic tailings into coarse and fine particles. It also features a multi-stage gradient flotation unit composed of multiple flotation tanks connected in series. Each flotation tank is equipped with an independent stirring drive device, an aeration system, a liquid level adjustment mechanism, and a reagent dosing device. Furthermore, by setting different aeration volumes and stirring linear velocities, multi-gradient flotation operations including roughing, primary cleaning, secondary cleaning, and intermediate cleaning can be achieved. This multi-stage flotation and synergistic control system for high-value clean coal recovery of mid-gangue magnetic tailings simultaneously achieves efficient extraction of clean coal and upgrading and utilization of tailings slime through a systematic architecture of classification pretreatment, multi-stage gradient flotation, and closed-loop control.

The present application relates to the technical field of flotation froth image recognition, and discloses a fly ash flotation clean coal ash content prediction method and device based on GA-PSO-SVR, the method comprising the following steps: obtaining multiple fly ash flotation froth images and corresponding clean coal ash content values; performing multi-dimensional feature extraction on each froth image, correlating the multi-dimensional features of each froth image with the corresponding clean coal ash content value, and constructing a training data set; using the training data set, based on a support vector regression model, training a clean coal ash content prediction model, wherein the parameters of the support vector regression model are optimized based on a hybrid optimization algorithm composed of a genetic algorithm and a particle swarm optimization algorithm, and the fitness function used by the hybrid optimization algorithm is the weighted sum of the ash content prediction error and the froth image noise weight coefficient. The present application can accurately fit the nonlinear mapping relationship between the froth features and the clean coal ash content, and improve the accuracy and stability of the ash content prediction.

The utility model discloses a kind of quick sealing equipment for clean coal packaging, it is related to sealing equipment technical field, comprising: bag sewing machine main body, set up in the support rod, with support rod fixed connection;Conveyer belt, for the transmission of the packaging bag of clean coal;Lifting mechanism, set up in the support frame;Adjusting mechanism, set up in the support frame, for the righting of the packaging bag of clean coal, avoid packaging bag inclination, influence the accurate sealing of packaging bag;By setting lifting mechanism, the height of support rod is adjusted, so that bag sewing machine main body can be sealed to the packaging bag of different height clean coal, improve the use flexibility of sealing equipment;By setting adjusting mechanism, the righting of the packaging bag of clean coal is realized and fixed, avoid packaging bag inclination, influence the accurate sealing of packaging bag, so that the sealing of packaging bag is more accurate.

This utility model discloses a device for cleaning coal dust accumulation on factory vehicles, belonging to the field of coal dust cleaning technology. It includes a passageway frame, a dust removal component, and a bag filter. The bag filter is positioned beside the passageway frame. An opening for vehicle passage is formed at the bottom of the passageway frame, and the dust removal component is located at the top of the opening. A movable support plate is located on the top of the inner side of the passageway frame, with several dust removal heads on its lower surface. A hydraulic electric lifting rod is fixedly installed on the top of the movable support plate. The advantages of this utility model are: the dust removal component located below the passageway frame allows for dust removal of the vehicle roof surface through the cooperation of an industrial dust collector and the dust removal heads located above the vehicle roof. The collected coal dust can be transported to the bag filter for processing. Furthermore, the dust removal component can be adjusted up and down by the hydraulic electric lifting rod, allowing it to be closer to the vehicle roof, thereby improving the coal dust removal effect.

The present application provides a heavy medium cyclone clean coal dewatering method and system, which belongs to the technical field of coal washing. In the existing dewatering process of the vibration screen and the horizontal vibration discharge centrifuge, a double air source composite dry separation machine is added between the vibration screen and the horizontal vibration discharge centrifuge. The double air source composite dry separation machine separates the material on the screen of the vibration screen into fine particle product and coarse and heavy particle product. The horizontal vibration discharge centrifuge is used for dewatering the fine particle product, and hot air is used for directly drying the coarse and heavy particle product. The dried coarse and heavy particle product and the dewatered fine particle product are the final dewatered products. Only the fine particle product is selected for centrifugal separation, which can effectively improve the dewatering efficiency and prolong the service life of the horizontal vibration discharge centrifuge.

The utility model discloses a kind of clean coal drying waste heat recycling equipment, it is related to recycling equipment technical field, and it includes: collection equipment main body, set in the support frame, with support frame fixed connection;Support pipe, with multiple, and multiple support pipe symmetry is set on the collection equipment main body, with collection equipment main body fixed connection;Filter plate, set in the support frame, with support frame fixed connection;Vibration mechanism, set in the support frame;Cleaning mechanism, set in the support frame;By setting vibration mechanism, the impurities adhered on filter plate are vibrated, so that the impurities on filter plate are loose, and some dust that is not closely adhered falls;By setting cleaning mechanism, the surface of filter plate is cleaned, so that the loosened impurities are separated from the surface of filter plate, so as to avoid filter plate to be blocked, affect filter plate to filter particulate matter in waste gas.

The present application belongs to the technical field of coal washing and sorting modeling and intelligent control, and particularly relates to a dense medium separation dynamic simulation method and system. The method covers the dynamic mechanism model of the whole process of dense medium separation, and on the fast time scale, the key equipment parameters in the density control loop that cannot be directly measured are estimated online. In combination with the Monte Carlo data mining algorithm, the error between the simulated value and the actual value of the medium density is used to generate the tutor signal to supervise the learning and online correction of the online estimation. On the slow time scale, based on the error between the simulated value and the actual sampling value of the clean coal ash, the Bayesian optimization algorithm is used to optimize and update the key separation parameters of the cyclone separation process. The present application effectively solves the problems of insufficient dynamic tracking precision and adaptive ability of the traditional simulation model by using the hybrid intelligent driving and double time scale parameter updating mechanism, and provides a high-precision simulation platform and technical support for the intelligent control and operation optimization of the dense medium separation process.

This invention discloses a fine desulfurization and coal washing process, relating to the field of coal washing technology. Raw coal is crushed, and the crushed coal blocks are graded and screened to obtain coal blocks with particle sizes of 13–50 mm, 0.5–13 mm, and <0.5 mm. Coal blocks with a particle size of 13–50 mm are fed into a jig to discharge gangue and middlings, yielding coarse and clean coal. Coal blocks with a particle size of 0.5–13 mm, along with the coarse and clean coal obtained from the jig, are fed into a heavy medium cyclone separator to produce clean coal, middlings, and gangue. The obtained middlings are then sequentially fed into a jig for further coarsening and a heavy medium cyclone separator for further cleaning, resulting in desulfurization. This invention achieves economical and efficient separation of raw coal across all particle sizes through a "coarse-fine" grading process, taking into account both the high efficiency and low cost of jigging and the high precision of heavy media. This invention is suitable for large and medium-sized coal preparation plants, especially in scenarios where the raw coal properties are complex and the requirements for clean coal quality are high, which can significantly improve the economic benefits and resource utilization of enterprises.

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.

This invention discloses a method for determining sorting parameters in a coal preparation process, comprising: real-time acquisition of relevant data during the coal preparation process; determining preset values ​​of sorting parameters based on historical bypass opening and a pre-set target calorific value of clean coal; performing feedforward compensation using a feedforward compensator based on the measured coal feed rate to obtain a feedforward compensation value; performing feedback compensation using a feedback compensator based on the measured calorific value of clean coal to obtain a feedback compensation value; predicting the dynamic process of clean coal calorific value using a nonlinear function to calculate the predicted calorific value of clean coal; performing prediction compensation using a prediction compensator based on the predicted calorific value of clean coal to obtain a prediction compensation value; and obtaining the determined values ​​of sorting parameters based on the preset values ​​of sorting parameters, the feedforward compensation value, the feedback compensation value, and the prediction compensation value. This invention combines a triple compensation mechanism of feedforward, feedback, and prediction, which can accurately control the sorting parameters, keeping the calorific value of clean coal stable within the target range, thereby ensuring the quality of clean coal.

The present application relates to the technical field of coal washing process production scheduling, and specifically discloses a coal washing process production scheduling optimization system based on dynamic modeling, comprising a production data real-time acquisition module, a dynamic raw coal property analysis module, a production state prediction module, a scheduling strategy generation module, a constraint condition verification module and an optimization decision module. The present application acquires raw coal properties, equipment states and quality index data in real time, obtains dynamic characterization of raw coal selectability curves through sliding window sampling, density composition analysis and adaptive filtering processing, deduces a production state prediction sequence using a Markov decision process, adjusts a process standard flow to generate an adaptive scheduling strategy scheme, screens a feasible strategy set after quality constraint verification, finally solves a multi-objective optimization problem with the goal of maximizing coal washing efficiency and minimizing energy consumption, and outputs optimal production scheduling instructions; the present application tracks raw coal property fluctuations and predicts production state evolution trends in real time, and ensures that clean coal product quality meets standards.

This invention relates to the field of coal mine cleaning technology, and specifically discloses a self-cleaning coal washing device, comprising: a water collection tank, one side of which is connected to a drain pipe, and a discharge port on the side of the water collection tank away from the drain pipe, with a water guide plate fixedly connected to the inner wall of the discharge port and a shielding cover fixedly connected to the outer side of the water guide plate; a feeding frame, the outer side of which is fixedly connected to the bottom of the inner wall of the water collection tank via a bracket; a belt conveyor, the outer side of which is fixedly connected to the bottom of the inner wall of the water collection tank via a bracket; a pre-spraying device, which penetrates the shielding cover and is fixedly connected to the outer wall of the shielding cover; and a rinsing device, the bottom of which is fixedly connected to the bottom of the inner wall of the water collection tank. This self-cleaning coal washing device can fully wet materials at different layers.

This invention discloses a method for preparing ultrapure coal based on a combined pre-carbonization-flotation process, belonging to the field of deep coal processing and high-value utilization. The steps are as follows: Raw coal is crushed and ground, then subjected to low-temperature pre-carbonization in an inert atmosphere. The pre-carbonized coal sample is then slurried and a collector and frother are added sequentially, followed by flotation to obtain clean coal. The clean coal undergoes two further cleaning processes, followed by filtration and drying to obtain ultrapure coal. This invention effectively removes hydrophilic oxygen-containing functional groups from the coal surface through low-temperature pre-carbonization, enhancing surface hydrophobicity, reducing surface charge density, optimizing surface morphology, and significantly improving the floatability of coal, resulting in ultrapure coal with an ash content of less than 1.0%. This method is simple and efficient, placing the low-temperature pre-carbonization process, used to regulate the structure of coal-based carbon materials, before flotation deashing. The resulting ultrapure coal has a complete organic structure and can serve as a high-quality precursor for high-value-added coal-based carbon materials such as hard carbon, porous carbon, and graphite.

The present application relates to a kind of coal tower suspension material cleaning equipment;Including positioning disc;The bottom of the positioning disc is fixedly connected with connecting pipe, the top of the connecting pipe is connected with water inlet pipe, the bottom of the positioning disc is provided with positioning groove, the inner side wall of the positioning groove is rotatably connected with driving wheel by positioning rod;The present application is positioned by the setting of positioning disc and driving wheel, so that driving wheel is attached to the inner wall of coal tower, ensure the stability of positioning disc in the lifting process in coal tower, to position connecting pipe, positioning disc enters coal tower, start pump water machine and pump into water to cleaning pipe, water is sprayed by nozzle and is impacted to the inner wall of coal tower, the broken blade of the bottom of connecting pipe rotates, broken blade is cut and broken to the coal block accumulated before high-pressure spray gun is cleaned to the inner wall of coal tower, avoid freezing due to temperature too low, at this time, high-pressure spray gun is more difficult to spray and clean coal block or cleaning time is longer.

The utility model discloses a kind of jigging coal clean coal centrifugal dewatering devices, including frame and the shell being installed on frame, the centrifugal dewatering mechanism is equipped in shell, shell bottom is equipped with rotary drying mechanism;Centrifugal dewatering mechanism includes feeding port, driving motor, driving shaft, transmission shaft, rotary disc, sieve basket, scraper rotor and distribution tray.The beneficial effects of the utility model are that, by being equipped with centrifugal dewatering mechanism in shell, distribution tray first evenly flings clean coal to sieve basket inner wall, under the action of centrifugal force, water flows into shell through sieve basket, and is discharged through drain, spiral scraper is scraped from sieve basket, falls into conveying pipeline, realizes continuous centrifugal dewatering processing, conveying pipeline can rotate drying treatment to clean coal, to reduce clean coal humidity.

This invention belongs to the field of mineral flotation technology, specifically relating to a method for improving the yield of clean coal in difficult-to-float coal slime. The method includes: S1, reagent preparation and pretreatment: Based on the coal quality characteristics, methyl linoleate is mixed with n-dodecane and / or n-tetradecane at a mass ratio of (1-5):1, and ultrasonically dispersed for 3 hours to form a microemulsion composite collector; S2, slurry conditioning and mineralization: The above collector (800-1600 g / ton dry coal slime) and a frother are added to a slurry with a concentration of 80 g / L and stirred for 3 minutes; S3, flotation separation: Air bubbles are introduced to scrape off the clean coal. This invention, through a microemulsion composite collector with a specific composition, significantly enhances the hydrophobicity of the surface of difficult-to-float coal particles and the adhesion efficiency with air bubbles, solving the problems of poor selectivity and low clean coal yield of traditional collectors. It has the advantages of strong adaptability, high flotation efficiency, and a significant increase in clean coal yield.

This invention relates to the field of clean coal ash content detection technology, and particularly to a rapid detection method and system for clean coal ash content. The method includes: preparing a test sample of the coal sample to be tested into a predetermined shape; emitting a pulsed laser to the detection area of ​​the test sample to excite plasma and acquiring the original characteristic spectrum of the plasma emission; emitting a probe ray to the same detection area and measuring the physical background parameters after the probe ray interacts with the sample, which reflect the current physical state of the test sample; extracting elemental spectral feature data related to ash content based on the original characteristic spectrum; retrieving a pre-stored correction function based on the physical background parameters to perform real-time correction on the elemental spectral feature data, obtaining corrected elemental spectral feature data; and inputting the corrected elemental spectral feature data into a preset ash content calculation model to output the ash content value of the coal sample. This invention improves detection accuracy through multi-source information collaborative processing, meeting the industrial application requirements for rapid and accurate online detection of clean coal ash content.

This invention relates to a monitoring and control system and method for nitrogen oxide emissions in an ammonia-coal co-combustion process, belonging to the field of clean coal combustion technology. The system includes a furnace, an ammonia-coal co-combustion system, an online monitoring system, a combustion state sensing system, and an intelligent control system. The ammonia-coal co-combustion system supplies pulverized coal and ammonia to the main combustion zone and staged air to the burnout zone. The online monitoring and combustion state sensing system collects operating condition signals in real time. The intelligent control system predicts emission trends based on multi-source signals and a mechanism-data hybrid model, and dynamically adjusts the coal-ammonia supply and air distribution parameters through multi-objective Pareto optimization. This invention achieves synergistic optimization of nitrogen oxide emissions and combustion efficiency, solving the problem of mutual constraints between stable combustion and low nitrogen emissions under high-proportion ammonia blending, and has good prospects for industrial application.

The application discloses a method for enriching sulfur resources in high-sulfur coal gangue and recovering low-ash carbon quality, which comprises the following steps: 1) grading and crushing the high-sulfur coal gangue, then performing liquid-phase grinding and dissociation, filtering and drying to obtain high-sulfur coal gangue powder; 2) adding inhibitors, collectors and foaming agents to the high-sulfur coal gangue powder after slurry preparation to perform flotation, thereby obtaining sulfur concentrate and flotation tailings; 3) performing flocculation, thickening, dehydration, filtration and drying on the sulfur concentrate to obtain high-purity sulfur concentrate products; and 4) performing slurry preparation on the flotation tailings after filtering and drying, then performing gravity separation to obtain low-ash clean coal and fine gangue. The method realizes accurate separation of coal, gangue and sulfide ore through efficient separation technology, optimization of flotation process structure and accurate control of process conditions, and has the advantages of high recovery rate, high product quality, simple process flow, low production cost and the like, and has important significance for alleviating sulfur resource shortage and promoting green transformation of the coal industry.

The application discloses an integrated process for oil and hydrogen production and underground carbon sequestration by underground gasification, belonging to the field of clean coal utilization, zero carbon hydrogen energy and underground carbon sequestration. For a large system with 40 million tons of raw coal processed annually to produce 10 million tons of finished oil, a V-shaped shield cavity coupling system is constructed to realize a closed-loop process of underground oxygen-enriched gasification, high-temperature purification, supercritical two-stage power generation, low-temperature advection catalytic oil production, waste heat recycling, surplus electricity electrolysis for hydrogen production, and carbon sequestration in the whole process. An oil and hydrogen physical isolation system is formed, and synthesis gas is specially used for oil production to ensure stable finished oil production capacity. 500 billion degrees of electricity are generated annually, 150 billion degrees of electricity are used, and 350 billion degrees of surplus electricity are used for hydrogen production. The low-temperature waste heat in electrolysis is recycled in stages, and waste heat is used for secondary power generation. Carbon dioxide is supercritically stored underground in the whole process to achieve near-zero emission on the ground and obtain zero-carbon certification and multiple carbon benefits. The process solves the problems of raw material conflict, power consumption, waste heat waste, carbon emission and the like, and has significant large-scale advantages.