267 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 provides an operation regulation and control method for a pulverizing unit matched with a coal-fired boiler during thermal power peak shaving, and belongs to the technical field of deep peak shaving boilers of coal-fired power plants. The operation regulation and control method comprises the following steps: determining a first typical particle size distribution interval when the coal-fired boiler is in a normal state and a second typical particle size distribution interval when the coal-fired boiler is in a peak regulation state, and establishing a mathematical intelligent model between the coal-fired particle size and the thermal power generation system performance; the number and working parameters of flour mills are configured; and when the thermal power generation system is in a normal state or a peak regulation state, according to the calculated fire coal granularity requirement, in combination with the real-time monitoring data and the optimization result of the mathematical intelligent model, determining and starting a corresponding number of flour mills, and dynamically adjusting the working parameters of the flour mills. The number of the flour mills is increased on the basis of one original flour mill, and the running states of the flour mills are finely regulated and controlled, so that the flour mills can efficiently run under different working conditions, and the requirements of a thermal power generation system are met.

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 invention relates to the technical field of coal mining, in particular to a dry coal preparation control system based on data analysis, which comprises a real-time data acquisition module, a data analysis module, a self-adaptive control module and a feedback optimization module. The real-time data acquisition module acquires information such as granularity, density, images and moisture of coal particles through a granularity sensor, a density sensor, an image sensor and a humidity sensor, and transmits data to the central processing unit. And the data analysis module analyzes the collected data based on a random forest algorithm to generate a sorting precision prediction value. The self-adaptive control module dynamically adjusts key parameters of the coal dressing equipment according to the predicted value by utilizing a PID control algorithm, and the key parameters comprise the wind speed, the screen inclination angle, the material flow speed and the like. The system not only improves the coal dressing precision and stability, but also improves the self-adaptive capacity of the equipment through intelligent control and optimization, and the system is suitable for popularization and application. The method has remarkable economic benefits and wide application prospects.

The invention relates to a method for preparing ultra-pure coal through combination of grinding and flotation. The method comprises the following steps: carrying out primary surface modification and flotation to remove most of gangue; fine silt on the surfaces of the coal particles is removed through scrubbing and ore grinding, and the hydrophobicity of the coal is improved by combining secondary surface modification and flotation; the coal quality is judged according to the ash content of secondary flotation clean coal, if the ash content is larger than 3%, dissociation ore grinding and grading are conducted, and it is guaranteed that coal and gangue are fully dissociated; double-emulsion surface modification is adopted to enhance the dispersibility of the agent, and finally, the ultra-pure coal with the ash content smaller than 1% is obtained through three-time flotation and four-time flotation. Through the synergistic effect of scrubbing ore grinding, dissociation ore grinding and multi-section flotation, the dissociation efficiency and flotation selectivity of coal and gangue are effectively improved, the method adapts to coal quality fluctuation, and the yield of ultra-pure coal is increased.

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.

According to the anti-blocking device for the feed opening of the coal feeder based on the synergistic effect of vibration and airflow, a synergistic anti-blocking mechanism is formed through the vibrators on the outer side of the outer sleeve and the air nozzles distributed in the circumferential direction, and the vibration force of the vibrators can break through an arch bridge which is likely to be bonded when the humidity of fire coal is high and likely to be formed when the granularity is uneven; compressed air is jetted into the cylinder through the air nozzle and can directly blow away locally accumulated pulverized coal remaining after vibration, meanwhile, fine pulverized coal particles attached to the inner wall of the discharging port are removed, the hidden danger of blockage is further eliminated, and the problems that traditional manual cleaning is large in labor intensity and low in operation efficiency and has potential safety hazards are effectively solved. The defects of equipment abrasion and newly increased blocking points caused by direct contact of a mechanical dredging structure and pulverized coal are avoided, pulverized coal accumulation balance can be broken without frequent manual intervention, particles attached to the inner wall can be removed, the pulverized coal fluidity is remarkably improved, blocking of a discharging opening is stably prevented, and continuity and stability of the fire coal conveying process of a thermal power plant are guaranteed.

The utility model provides a primary air powder concentration measuring device and a heat supply system, and belongs to the technical field of concentration measurement, and the device comprises an electrostatic loading system which is used for carrying out charge loading treatment on electrostatic ions on the surfaces of all pulverized coal particles when a power plant is in a low load state, so that all the electrostatic ions reach a saturated state; each electric charge quantity measuring sensor is used for measuring the total electric charge quantity of the static ions reaching the saturation state; each signal detection sensor is used for detecting charges generated when the static ions reaching the saturation state flow through and generating electric signals; and the controller is used for calculating the pulverized coal mass flow according to the electric signal generated by the signal detection sensor, and calculating the primary pulverized coal concentration in the pulverized coal pipeline according to the total charge quantity of the electrostatic ions and the pulverized coal mass flow. According to the scheme, the primary air powder concentration can be accurately measured under the condition of low load of the power plant.

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 utility model discloses a storage stirring device for testing fuel coal in a power plant, which relates to the technical field of fire coal stirring and comprises a stirring box and a base, one side of the stirring box far away from the base is fixedly connected with a feed port, the side face of the stirring box is provided with a discharge port, the bottom of the stirring box is provided with a stirring component, and the stirring component comprises a stirring rod and stirring blades. An adjusting assembly is arranged between the stirring box and the base, the adjusting assembly comprises a connecting plate, coal in the stirring box is stirred through the stirring assembly, up-down repeated movement and autorotation are conducted in the stirring process, the stirring effect of coal particles can be further improved, stirring is more sufficient, and the stirring efficiency can be improved; and the stirring box is in an inclined state during discharging through the adjusting assembly, so that the coal particles are better discharged, the coal particles are not easy to remain in the shell, the use is relatively convenient, and the operation state of the device can be controlled through the driver.

The utility model relates to a vertical fluidized bed furnace with more sufficient combustion, which is characterized by comprising a feeding machine and a vertical combustion furnace, the discharge end of the feeding machine is provided with a first conveying belt, the discharge end of the first conveying belt is provided with a lifting conveying belt, the discharge end of the lifting conveying belt is provided with a roller screen, the discharge end of the roller screen is provided with a lifting machine, and the discharge end of the lifting conveying belt is provided with a second conveying belt. The discharging end of the elevator is provided with a transfer bin, the discharging end of the transfer bin is connected with a feeding port of the vertical combustion furnace, the bottom of the vertical combustion furnace is connected with a centrifugal fan, the top of the vertical combustion furnace is connected with a cyclone dust collector, and the discharging end of the cyclone dust collector is connected with a drying tower. The combustion main furnace is arranged to be of a vertical structure, rotating airflow is added to the bottom of the combustion main furnace, large-particle coal particles are blown up to be combusted repeatedly, and the coal particles are combusted more sufficiently.

The invention discloses a treatment method for enhancing the seepage capacity of a reservoir and an extraction method of unconventional natural gas, and relates to the technical field of reservoir extraction. According to the method, hydraulic fracturing operation is conducted on a target reservoir with the seepage capacity to be improved in the coal rock reservoir, oxygen injection ignition operation is conducted on the target reservoir through an underground instrument string, coal rock of the target reservoir is combusted and heated to the target temperature at which the structure of the coal rock changes, the structure of the coal rock changes in the temperature rising process, and the phenomenon of softening and melting is generated; when the operation result of the oxygen injection ignition operation reaches a preset target, the operation is stopped, a wellhead communicated with a shaft is closed, after the closing duration of the wellhead reaches a preset duration, pulverized coal particles around the hydraulic fracture are consolidated to the wall surface of the hydraulic fracture, and the pulverized coal particles and a propping agent filled in the hydraulic fracture form a high-strength, good-permeability and high-strength hydraulic fracture supporting agent. And the coal powder barrier can be blocked, so that the reservoir seepage capacity of the coal rock reservoir is improved, and the damage of coal powder falling to the fracture seepage capacity is solved from the source.

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 an impingement type inertial separator for separating pulverized coal and air, which comprises a separator cylinder, an air-pulverized coal mixture inlet pipe arranged on one side of the lower end of the separator cylinder, a vertical middle shaft arranged in the separator cylinder, a secondary separation baffle arranged above the secondary separation baffle, and an umbrella-shaped separation component arranged below the secondary separation baffle; the umbrella-shaped separation component comprises a plurality of conical shells, the top of each conical shell is provided with an umbrella-shaped separation component middle shaft connecting hole, the secondary separation baffle is provided with a secondary separation baffle middle shaft connecting hole in the center, the middle shaft passes through the secondary separation baffle middle shaft connecting hole and the umbrella-shaped separation component middle shaft connecting hole from top to bottom in sequence, and is fixedly connected with the secondary separation baffle and the umbrella-shaped separation component. The separator utilizes the umbrella-shaped separation component with the size gradually increasing from bottom to top to gradually intercept the pulverized coal particles, and the fine pulverized coal particles are filtered through the filter screen on the secondary separation baffle, so that the gas-solid separation is more complete, and the separation efficiency is higher.

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 present invention relates to the field of liquid level measurement technology, and specifically discloses a mechanical water-coal slurry storage tank liquid level measuring device, comprising: a tank body, a mounting opening is provided on the top thereof, and a measuring frame is fixedly installed on the inner wall of the mounting opening, the bottom of the measuring frame extends to the inner bottom of the tank body; an instrument barrel, an observation port for fixing the instrument barrel is provided on one side of the measuring frame, and an annular scale line is provided on the inner wall of one side of the measuring frame, and an indicator needle is rotatably connected to the middle of the inner wall of one side of the measuring frame via a pin. The present invention can effectively push away precipitated coal particles to prevent them from getting stuck on an annular floating platform, and can also overcome the high viscosity resistance of the water-coal slurry, allowing the annular floating platform to move quickly and stably with changes in the liquid level, avoiding measurement failure problems caused by stagnation or slow rise, and can also amplify the tiny displacement of the annular floating platform and accurately convert it into a noticeable rotation of the indicator needle, thereby realizing rapid measurement of the liquid level.

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 utility model relates to a raw coal conveying and dewatering device which comprises a linear vibrating screen arranged at the tail of a raw coal main conveying belt and used for conducting primary screening on conveyed raw coal and throwing screened large-particle raw coal into the main conveying belt to be conveyed out. The small-particle-containing raw coal slurry falls into a sedimentation tank; the slurry pump is placed in the sedimentation tank and used for stirring and sucking raw coal slurry in the sedimentation tank and conveying the raw coal slurry to the solid-liquid separator, and a discharging port of the slurry pump is connected with a feeding port of the solid-liquid separator through a pipeline; the solid-liquid separator is erected above the main conveying belt and used for conducting secondary screening and dewatering on the raw coal slurry conveyed by the slurry pump and throwing screened solid raw coal particles into the main conveying belt to be conveyed out, and remaining slurry water is conveyed to a designated place. The dehydration problem of raw coal in the transportation process can be solved, the applicability is high, the conveying capacity is large, the dehydration effect is good, and the problem of on-site production halt caused by large water content of the raw coal is solved.

The invention discloses organic amine loaded-sulfur self-doped activated carbon for capturing CO2 in coal-fired flue gas and a preparation method of the activated carbon. The preparation method of the activated carbon comprises the following steps: crushing high-sulfur coal and carrying out acid pickling treatment; mixing and doping the pulverized coal particles subjected to acid pickling with potassium hydroxide, carbonizing, and performing pyrolysis activation to form coarse activated carbon; performing ultrasonic cleaning on the coarse activated carbon, and drying to obtain sulfur-doped activated carbon; placing the sulfur-doped activated carbon in a vacuum impregnation device, vacuumizing to form a negative pressure environment, atomizing an organic amine solution, and introducing the atomized organic amine solution into a vacuum impregnation cavity; and drying to obtain the organic amine loaded-sulfur self-doped activated carbon. According to the organic amine loaded-sulfur self-doped activated carbon for capturing CO2 in coal-fired flue gas, the preparation cost is reduced, the adsorption performance of the activated carbon on CO2 acid gas is improved, the adsorption selectivity, the adsorption stability and the adsorption capacity of the activated carbon are enhanced, and the adverse effect of water vapor on the physical adsorption process of CO2 can be reduced.

The invention relates to the field of biomass-fire coal coupling generator sets. The screening system comprises mixing equipment arranged on one side of an inlet of a combustion furnace, a biomass crushing bin, a fire coal crushing bin, a uniform mixing assembly and a humidity measuring assembly, wherein the biomass crushing bin and the fire coal crushing bin are arranged at an inlet of the mixing equipment, the uniform mixing assembly is arranged in the mixing equipment, and the humidity measuring assembly is arranged in the mixing equipment. A shear type crushing roller is arranged in the biomass crushing bin, a hammer type crushing roller is arranged in the fire coal crushing bin, the uniform mixing assembly comprises a biomass uniform mixing piece and a fire coal particle uniform mixing piece, the rotating speed of the biomass uniform mixing piece and the rotating speed of the fire coal particle uniform mixing piece are independently adjusted, and the mixing device comprises a barrel and is internally provided with a partition plate which divides the mixing device into a biomass bin and a fire coal bin. The biomass crushing bin is communicated with the biomass bin, the fire coal crushing bin is communicated with the fire coal bin, and a uniform mixing bin is arranged on the bottom side of the mixing equipment. The biomass fuel and the fire coal are fully mixed, and the particle sizes are kept consistent, so that the problem of insufficient and uniform combustion is solved.