634 results about "Coal dust" patented technology

The invention discloses an intelligent monitoring system for a coal conveying trestle belt, and the system comprises a data collection module which is used for collecting the image of the coal conveying belt and measuring the thickness distribution data of coal dust on the surface of the belt in real time, and obtaining a time sequence video stream and a coal dust thickness matrix of the coal conveying belt; the dynamic reference module is used for extracting a static belt structure according to the time sequence video stream to obtain an initial reference feature map as a belt reference image without coal dust interference; the coal dust sensing and coding module is used for inhibiting high-shielding area feature response according to the coal dust thickness matrix and coding the belt image of the current frame to obtain a feature map of the current frame; the dynamic difference analysis module is used for performing difference analysis according to the current frame feature map and the belt reference image to obtain an abnormal area; according to the method, high-definition imaging of the surface of the belt and stable extraction of abnormal characteristics can be realized in a complex environment of dynamic shielding of coal dust and nonlinear attenuation of optical signals.

The invention discloses a cyclone separation and moving particle bed coupled pulverized coal pyrolysis oil gas high-temperature dust removal system, and belongs to the technical field of coal clean utilization. The system comprises a cyclone separator, a fine filtration unit, a filter material cyclic regeneration unit and an intelligent control unit, the fine filtration unit comprises a particle bed, a particle bin is arranged at the top end of the particle bed, and a composite filter material layer is arranged on the particle bed; a dust-containing high-temperature oil gas pipeline and a pretreatment high-temperature oil gas pipeline are arranged at the top end of the cyclone separator, dust-containing high-temperature oil gas is introduced into the cyclone separator through the dust-containing high-temperature oil gas pipeline to be pretreated, and the pretreated dust-containing high-temperature oil gas is introduced into the particle bed through the pretreatment high-temperature oil gas pipeline to be finely filtered; and a coke breeze discharge pipe is arranged at the bottom of the cyclone separator. The invention is used for solving the technical problem of low gas-solid separation efficiency at high temperature caused by the adoption of a single filter material in the existing pulverized coal dust removal system.

The invention discloses a coal mine coal dust explosion risk dynamic evaluation and explosion suppression system, which comprises a sensing module, a data processing module, a data processing module and a data processing module, wherein the sensing module is used for acquiring direct and indirect parameters of an underground environment; the central processing module is used for operating a risk assessment algorithm and generating a control instruction; the explosion suppression execution modules are distributed in pipelines and roadways of underground key nodes and are used for executing explosion suppression actions; the active chemical detection module is arranged in the main ventilation pipeline and is used for carrying out pre-chemical sampling and analysis on the inflowing air so as to judge the abnormal enrichment trend of the explosive gas; according to the system, a dynamic risk assessment system based on multi-source indirect perception and active chemical detection is constructed, and precise explosion suppression of time-space cooperation is realized. The method has the advantages of being capable of achieving early warning, dynamic evaluation and precise collaborative explosion suppression.

The invention discloses a multi-stage pulverized coal separator with dynamic guide vanes. The multi-stage pulverized coal separator comprises a mounting rack; the transmission assembly is assembled on the mounting frame and is used for conveying pulverized coal; the screening assembly is assembled on the mounting frame and is used for screening pulverized coal with qualified sizes; the threaded discharging opening is fixedly connected to the side face of the mounting frame; and the circulating connecting pipe is fixedly connected to the tail end of the mounting frame. The screening efficiency of the separator is high.

The invention belongs to the technical field of coal bunker dredging, and particularly relates to a coal bunker hydraulic drilling rig dredging device which comprises a pipe barrel frame, fixing blocks, a flow dividing barrel, a slope falling type material guiding mechanism and a hydraulic drilling type material passing mechanism, the fixing blocks are arranged on the inner wall of the pipe barrel frame, the flow dividing barrel is arranged between the fixing blocks, the slope falling type material guiding mechanism is arranged on the fixing blocks, and the hydraulic drilling type material passing mechanism is arranged on the pipe barrel frame. The hydraulic drill type material passing mechanism is arranged on the slope falling type material guiding mechanism, and the slope falling type material guiding mechanism comprises a material falling assembly, a lifting assembly and a buffering assembly. According to the dredging device for the coal bunker hydraulic drilling rig, coal falling into the coal bunker can be buffered, generation of pulverized coal is reduced, and the blockage phenomenon occurring in the discharging channel can be monitored.

The invention belongs to the technical field of dust suppressants, and particularly relates to a biomass-based dust suppressant as well as a preparation method and application thereof. The biomass-based material comprises a micron-sized structure and a nano-sized structure distributed on the micron-sized structure. After the dust suppressant is sprayed on the surface layer of minerals such as coal, the dust suppression mechanism is changed according to the change of the water content, and when the water content is high, the dust suppressant can adhere to coal dust to suppress flying of the coal dust; when water volatilizes, the micro-nano biomass material or the water-soluble cellulose derivative can spontaneously assemble into a film, and the dried dust suppressant has a complete film-forming structure, certain strength, wind erosion resistance and strong affinity with coal, so that the long-time dust suppression capability of the dust suppressant can be ensured.

The invention discloses floating coal dust treatment equipment of a thermal power generation coal conveying system, and relates to the technical field of thermal power generation coal dust treatment. The floating coal dust treatment equipment for the thermal power generation coal conveying system comprises a dust collection barrel body, and a dust passing net is assembled on the top of the dust collection barrel body; and the air exhaust pipeline penetrates through the dust collection barrel main body. According to the floating coal dust treatment equipment for the thermal power generation coal conveying system, an air extracting pump is started, corresponding air extracting operation is carried out through an air extracting pipeline and a connecting cover, a fixed bin, a wind wheel, a first bevel gear, a first transmission rod, a second bevel gear, a first chain wheel, a chain, a reciprocating lead screw, a second chain wheel and a movable block are matched, and a cleaning brush plate reciprocates on an air passing net; according to the dust collection barrel, the dust collection barrel body is arranged, coal dust attached to the air passing net is cleaned into the dust collection barrel body, when the dust collection barrel is synchronously used with spraying and dust falling equipment, the coal dust with certain viscosity attached to the air passing net is cleaned, and the use efficiency of the dust collection barrel is improved.

The invention relates to the technical field of vertical shaft guide detection, in particular to an industrial intelligent visual detection and diagnosis system for a vertical shaft guide. The coal dust shadow quantization unit extracts a coal dust region by adopting a double-peak self-adaptive threshold segmentation combined region growing algorithm, and introduces a space weight factor to calculate an average gray value and a coverage area proportion, and the dynamic coupling calibration unit depends on a three-dimensional lookup table calibrated by multiple working conditions and nonlinear interpolation; the optimal deviation compensation coefficient of the jitter and coal dust combination is matched, a dynamic gray segmentation threshold value is generated, and a defect diagnosis decision unit accurately calculates the abrasion depth through partition self-adaptive segmentation, multi-scale morphological filtering and denoising and gradient amplitude and curvature double-constrained sub-pixel edge detection. A hierarchical control instruction is output according to the real-time depth and the historical trend, coupling interference is eliminated, the cage guide abrasion detection accuracy is improved, and a reliable basis is provided for safe operation and maintenance.

The invention discloses a water power negative pressure dust removal device of a coal machine, and belongs to the technical field of coal mine dust removal. Comprising a fixing box, a jet flow assembly and a filtering assembly are installed on the fixing box, the filtering assembly comprises an outer pipe installed on the fixing box, a filtering cylinder is fixedly installed in the outer pipe, the filtering cylinder divides the outer pipe into an outer cavity and an inner cavity, a liquid outlet of the jet flow assembly communicates with the inner cavity, and a supporting shaft is rotationally connected to the outer pipe; an impeller and a driving assembly are installed on the supporting shaft. The jet flow assembly generates negative pressure to suck coal dust, the coal dust is mixed with jet flow water and impacts on the impeller to drive the impeller to rotate, the impeller rotates to stir mixed liquid to the filter cartridge to accelerate filtration, meanwhile, the driving assembly is driven to operate, and the driving assembly sucks filtered water in the outer cavity and sprays the filtered water out through the multiple communicated atomization nozzles. Good dust removal and dust falling effects are achieved.

The invention provides a mining terrain-adaptive rotatable dust reduction belt conveying device. The mining terrain-adaptive rotatable dust reduction belt conveying device comprises a conveying assembly, a moving assembly and a dust reduction assembly; the conveying assembly comprises a conveyor, a belt and hydraulic supporting legs. The moving assembly comprises a frame chassis and crawler-type tires, and a rotating platform is arranged above the frame chassis; the dust reduction assembly comprises a pipeline support, a dust suppressant pipeline, a dust suppressant nozzle, a pressure spraying pipeline and a pressure spraying nozzle. High trafficability and flexibility of complex terrains can be guaranteed, coal transportation can be carried out more conveniently and efficiently, the working intensity of operators is effectively relieved, and coal dust is reduced; the coal transportation route, direction, angle, transportation route and transshipment height difference can be adjusted in time; the stability of the coal in the conveying process is ensured; the generation of coal dust is inhibited; the stability and the balance of the conveyor in the rotating process are ensured; transfer coal dust can be effectively reduced in the whole operation process, and the operation efficiency of operators is improved.

The invention discloses a coal mining equipment gear box oil liquid multi-parameter real-time online intelligent monitoring system, and relates to the technical field of coal mining equipment intelligent monitoring, and the system comprises a multi-parameter sensing unit which is mechanically connected to the interior of a gear box oil way; the edge calculation unit is electrically connected with the multi-parameter sensing unit through a signal cable; and the mining intrinsic safety type communication module is fixedly mounted at the output end of the edge computing unit. According to the coal mine equipment gearbox oil liquid multi-parameter real-time online intelligent monitoring system, through the collaborative design of the integrated probe and the three-dimensional compensation sealing ring, the problem of sensor failure caused by high dust invasion and strong vibration in a coal mine is solved, and it is ensured that multiple types of sensors stably operate for a long time in a gearbox oil way with the limited space; the molecular-level optimized functional coating is combined with a negative-pressure inert gas environment to form a double barrier for oil stains and pulverized coal, so that low-pollution detection of the sensitive element is realized.

The invention belongs to the technical field of unattended management of thermal power plants, and relates to an intelligent dust fall and combustion suppression unattended management and control method and system for a coal yard of a thermal power plant. The method comprises the following steps: acquiring coal dust concentration, a dust region, a plurality of coal pile weights and a plurality of coal pile position forms; obtaining the spraying amount according to the coal dust concentration, and obtaining the spraying area range according to the dust area. The coal pile temperature is obtained in real time, whether combustion suppression control needs to be carried out or not is judged according to the coal pile temperature, if yes, the component of combustion suppression medicine is obtained according to the weight of the multiple coal piles, the medicine concentration is obtained according to the component of the combustion suppression medicine and the coal pile temperature, and the spraying angle of the medicine spraying equipment is obtained according to the position forms of the multiple coal piles. The manual labor intensity and the occupational disease hazard probability are remarkably reduced through automatic spraying operation; and real-time temperature monitoring and precise spraying cooling are combined, so that spontaneous combustion of the coal pile is effectively prevented. According to the invention, intelligent safety control of the coal yard is realized, and the stability and reliability of safe operation of the coal yard are improved.

The invention belongs to the field of coal mine dust falling, and particularly relates to a composite coal dust suppressant spraying system and application thereof. The composite coal dust suppressant spraying system comprises a spraying unit and a dust suppressant solution, the spraying unit comprises a water storage tank, a high-pressure water pump and a wide-angle solid nozzle, the dust suppressant solution at least comprises alkylphenol polyoxyethylene ether and xanthan gum, and the dust suppressant solution is provided with a three-dimensional network structure used for filling coal dust particle gaps. By changing a spraying medium and adding materials into water, the characteristics of wetting, bonding, agglomeration and the like are improved, the composite dust suppressant with an energy-shaped three-dimensional network structure is developed, and a composite dust suppressant spraying system with the wettability, the water retention and the wind erosion resistance cooperatively improved is provided, so that the spraying and dust falling efficiency of a coal mine is improved, and the dust suppression effect is improved. And the problem of reentrainment of dust is solved.

The invention belongs to the technical field of coal mine safety research, and discloses a fuel-rich gas coal dust explosion residual gas secondary explosion test device which comprises a primary explosion container and a secondary explosion container, the primary explosion container is communicated with the secondary explosion container through a three-phase valve, and the three-phase valve is communicated with a gas sample bag; the pulverized coal spreading system comprises a first spreading machine and a second spreading machine which are fixedly arranged at the bottoms of the primary explosion container and the secondary explosion container in a penetrating manner respectively; the gas supply system comprises a premixing tank which is communicated with the primary explosion container and the secondary explosion container; and the image acquisition system comprises a first camera and a first infrared thermal imager which are arranged corresponding to the first explosion container, and a second camera and a second infrared thermal imager which are arranged corresponding to the secondary explosion container. According to the invention, the research on the flame propagation dynamic characteristic evolution mechanism under the influence of multiple parameters of fuel-rich gas coal dust explosion and residual gas explosion is realized, the experimental error is reduced, and the research cost is reduced.

The invention relates to the technical field of computer vision and industrial equipment fault diagnosis, in particular to a fault image diagnosis system for a remote controller of a bolter miner driven by a CMC chip. Comprising a data sensing module for synchronously acquiring a CMC chip internal logic state vector and a real-time observation image, and preprocessing to obtain target visual data; the generative reconstruction module maps the logic state vector to a high-dimensional space to generate an ideal feature map; the visual analysis module is used for extracting an observation feature map through a convolutional neural network, generating an interference distribution mask based on frequency domain texture statistics, and identifying an unstructured environmental noise region; the difference analysis module is used for calculating a semantic residual image by combining the ideal feature map, the observation feature map and the interference distribution mask, and generating an image difference analysis result; according to the method, ideal features are generated by using the internal logic state vector of the CMC, and the residual calculation of the coal dust noise area is shielded by the interference mask, so that the false alarm caused by the environmental noise is effectively eliminated, and the closed-loop verification that what you see is what you control is realized.

The utility model provides a coal dust spraying and dust falling device for coal mining, which comprises supports fixedly arranged on two sides of a rack at the output end of a conveying belt, a transverse plate is fixedly arranged between the top ends of the two supports, a spraying pipe is erected below the transverse plate, and spraying heads are uniformly arranged at the bottom of the spraying pipe; the spraying pipe is connected with a water supply assembly through a pipeline, the water supply assembly is electrically connected with a controller, and the controller is used for controlling the water supply assembly to supply water to the spraying pipe or stop supplying water to the spraying pipe. The controller is electrically connected with a relay for controlling the start and stop of the conveying belt and is used for collecting power-on and power-off signals of the conveying belt; according to the utility model, the water supply assembly and the conveying belt are in linkage control, spraying dust fall is carried out when the conveying belt runs, spraying dust fall is stopped after the conveying belt stops and delays for a period of time, the spraying dust fall is not influenced by the height of coal gangue flow on the conveying belt, and the dust fall effect is ensured.

The invention provides a supersonic rotational flow atomization dust removal spray head device and a spray pipe optimization simulation analysis method, and relates to the technical field of supersonic rotational flow atomization spray heads, the device comprises an air inlet pipe, a liquid inlet, a shell, a Laval spray pipe, an outer rotational flow pipeline and an atomization spray nozzle, the Laval spray pipe is arranged in the outer rotational flow pipeline, and the atomization spray nozzle is arranged in the shell; a wave elimination section of the Laval nozzle is connected with the atomizing nozzle, a spirally distributed liquid film circular seam is formed in the side wall of a mixing chamber at the lower end of a throat part of the Laval nozzle, and a spiral flow deflector is arranged at an outlet of the atomizing nozzle. Efficient dynamic interaction with rotating liquid supplied by the outer ring spiral channel occurs at the outlet of the nozzle, efficient fog drop crushing and uniform spraying are achieved through airflow acceleration and kinetic energy conversion, and it is guaranteed that the particle size of fog drops meets the requirements of capturing coal dust, improving the atomization efficiency, strengthening the wind resistance and reducing water consumption; better fogdrop particle size matching is realized; and the blocking risk is reduced.

The utility model relates to a staged feeding device capable of preventing coal dust from bonding. The device comprises a material frame, a lump coal hopper, a pulverized coal hopper, a first sieve plate and an adjusting mechanism, the bottom of the material frame is fixedly connected with the lump coal hopper used for collecting lump coal and the pulverized coal hopper used for collecting pulverized coal, the first sieve plate corresponding to the pulverized coal hopper is obliquely installed in the material frame, first sieve holes are formed in the first sieve plate and are in a long strip shape, and the adjusting mechanism is arranged on the first sieve plate. Lump coal can roll to the lump coal hopper along the first sieve plate, and pulverized coal penetrates through the first sieve holes to fall into the pulverized coal hopper; an adjusting mechanism is further installed in the material frame, and the screening size of the first screening plate can be adjusted through the adjusting mechanism. According to the scheme provided by the invention, the pulverized coal or the pea coal can be screened out before the coal mine enters the silo and treated independently, so that the situation that a large amount of the pulverized coal or the pea coal is bonded in the silo is avoided.

The following pneumatic wet-type vibrating wire dust remover comprises an air inlet barrel, a fan barrel and an air outlet barrel which are sequentially connected and coaxially arranged, an air inlet grille is fixed to the outer side of the air inlet end of the air inlet barrel, a negative pressure spraying device is arranged in the air inlet barrel in a sleeved mode, a water inlet is formed in the outer surface of the air inlet barrel, and the negative pressure spraying device is communicated with the water inlet; a vibrating wire dust removal plate is arranged in the air inlet barrel, and a pneumatic fan is coaxially arranged in the fan barrel. When in use, the device is respectively arranged at the left and right walking parts of the coal mining machine body to realize nearby dust removal, effectively reduce coal dust dissipation and achieve high dust removal efficiency. The device adopts negative-pressure spraying, the vibrating wire dust removal plate is matched with the fan to realize dust removal, the dust removal efficiency is high, and the effect is good. An air outlet of the device is matched with a silencer, and noise of the fan is effectively reduced. And the sewage is discharged to the toothed rail of the scraper conveyer through a special pipeline, so that the cleaning and lubricating effects are achieved, coal powder and dirt are treated without shutdown, the operation efficiency is further improved, and the operation environment is remarkably improved.

The application discloses a kind of based on ultra-wideband radar's on the scraper conveyor up and down slide monitoring device and method, belong to coal mine safety state monitoring technical field.The monitoring device includes the electric rotating platform installed on the head of scraper conveyor, linear array antenna pointing to the end face end coal wall is installed on the electric rotating platform, linear array antenna connects ultra-wideband imaging radar signal module;Industrial computer sends instruction to control the receiving and sending of ultra-wideband imaging radar signal module, the rotating movement of electric rotating platform respectively;Linear array antenna installed on the head of scraper conveyor is driven by electric rotating platform, periodically collects the radar image of end face end, then by registration with the image periodically collected before, to deduce the distance that the head of scraper conveyor up and down slide;It has strong robustness to the harsh environmental conditions of end face end coal dust water vapor, and monitoring data is accurate.

The invention relates to the technical field of gas well reservoir identification methods, in particular to a method and device for eliminating coal seam interference in gas well reservoir accurate identification, and the method comprises the following steps: determining the existence of a coal seam by using a while-drilling gamma curve, a resistivity curve and a rock debris logging coal dust proportion; calculating a dynamic influence factor; on the basis of a gas survey data correction formula, obtaining a gas survey correction value of any depth point, and on the basis of a resistivity correction formula, obtaining correction resistivity; and determining the reservoir type by combining the gas logging correction value, the correction resistivity, the gas logging humidity ratio and the interval transit time. According to the method, firstly, the gas logging data and the logging resistivity are corrected, the influence of the coal seam on the gas logging data and the resistivity data is eliminated, the abnormal interference of the coal seam on the gas logging data and the logging data is effectively removed, and then the gas logging correction value obtained after correction, the correction resistivity, the gas logging humidity ratio and the interval transit time are combined, so that the gas logging data and the logging resistivity are obtained. According to the method, the precision and the efficiency of gas reservoir identification are improved.

1. The name of this design product: Vehicle-mounted control box (KXB24 mining explosion-proof type). 2. Purpose of this design product: Used in places where there is a risk of gas and coal dust explosion in coal mines, as an automatic monitoring, protection and control device for various equipment. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

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 invention discloses a pulverized coal dust blocking mechanism for a scraper conveyor and a dust blocking method of the pulverized coal dust blocking mechanism, and relates to the technical field of scraper conveyors, the pulverized coal dust blocking mechanism comprises a rack, a primary dust blocking mechanism is arranged on the inner side of a supporting bearing, and the interior of the primary dust blocking mechanism comprises a static disc, a labyrinth movable disc, a compression packing brush and a dust discharging opening; static discs are installed on the two sides of the surface of the rack in an embedded mode, a labyrinth movable disc is arranged on one side of each static disc, the surface of a rotating shaft is sleeved with a compression packing brush, dust discharging openings are formed in the two sides of the surface of the rack, and a split labyrinth type dust blocking mechanism is arranged on the surface of the preliminary dust blocking mechanism. According to the split labyrinth type dust blocking mechanism, the risk that the supporting bearing is damaged due to dust invasion in a lubricating cavity of the supporting bearing can be reduced, dust left in an annular groove can be brushed, the automatic spraying function of the dust blocking mechanism on the surface of the split labyrinth type dust blocking mechanism is achieved, automatic water control is achieved, the labor intensity of workers is reduced, and the working efficiency is improved. And the cost is low.

The invention relates to the technical field of coal drying, in particular to central pipe heating coal upgrading and drying equipment. The coal dryer comprises a cylinder, the two ends of the cylinder are connected with a front-end extension pipe and a rear-end extension pipe respectively, a drying cavity is formed in the cylinder, a heating structure is arranged in the drying cavity, the section of the heating structure is circular, the heating structure is of a circulating pipeline structure, and low-temperature airflow is introduced into a pipeline and used for achieving non-contact low-temperature drying operation on coal. A drying mode of circulating airflow between the central pipeline and the 18 seamless steel pipes is adopted, so that a heat source is not in direct contact with coal, no open fire is generated in the whole process, and the hidden danger of explosion caused by contact between coal dust and the open fire is eliminated fundamentally; and meanwhile, the problems of local overheating, coal property change and the like caused by direct contact in traditional high-temperature drying are solved, and the safety of the drying process is improved.

The utility model relates to a gas discharge device for mine safety production, which belongs to the technical field of mine safety production technical equipment and comprises a base, a first support frame, a second support frame, a gas inlet seat, a harmful gas treatment box and a gas discharge seat, and a gas treatment mechanism is arranged at the top of the base. According to the gas emission device for mine safety production, coal dust and ore dust with large sizes are filtered under the action of a filter screen, gas is pumped into a gas spraying treatment chamber through a gas suction fan, and the coal dust and the ore dust in the gas are atomized under the action of an atomization spraying head, so that the gas emission effect is improved, and the gas emission efficiency is improved. Coal dust and ore dust particles are adsorbed on water, the weight of the particles is increased, so that the dust particles settle to the bottom of the gas spraying treatment chamber and are recycled into the recycling box, excessive water is evaporated under the action of a heating pipe and absorbent cotton, and gas is discharged after being treated by the harmful gas treatment box.

The utility model belongs to the field of circulating fans, and particularly relates to a circulating fan suitable for coal dressing, which comprises an outer main body, a mounting cover is arranged at the rear end of the outer main body, and an assembling mechanism is arranged between the outer main body and the mounting cover; the assembling mechanism comprises a motor, the motor is arranged at the front end of the outer main body, the motor is fixedly connected with the outer main body, the rear end of the motor penetrates through the front end of the outer main body to reach the interior of the outer main body, and the rear end of the motor is fixedly connected with a transmission rod; through the design of the assembling mechanism, the function that the impeller can be conveniently disassembled is achieved, and the problems that an existing fan is not provided with an assembly which can be conveniently disassembled, cleaned and overhauled, due to the fact that in the long-term use process of the fan, much coal dust is extremely prone to being accumulated on the surface of the impeller, if cleaning is not conducted in time, the draft force of the fan is extremely prone to being reduced, and the fan is damaged are solved. And meanwhile, the problem that the interior of the fan is easily blocked is solved, and the convenience of later maintenance is improved.

The utility model provides a pressure relief air window of a coal face, and belongs to the technical field of coal mining. Comprising a window frame in a right triangle shape, an air window is rotationally connected to one side wall of the window frame, electric push rods rotationally connected with the side wall of the air window are symmetrically and rotationally connected to the two inner side walls of the window frame, and a dust blocking air grid is arranged on the other side wall of the window frame; a cleaning brush arranged above the dust blocking air grid is arranged between the tops of the sliding blocks. The dust blocking air grid can be used for blocking coal dust flying in the coal face, the sweeping assembly and the motor work to enable the brush strips on the sweeping brush to move on the dust blocking air grid, the coal dust attached to the dust blocking air grid can be swept away, and the swept-away coal dust falls back into the coal face. Coal dust is effectively prevented from drifting to the outside atmosphere during pressure relief and ventilation, the environment is protected, and waste of coal resources can be avoided.

The application discloses a coal mine ventilation air oxidation power plant hot air recycling pipeline anti-backflow and coal dust explosion prevention device, ventilation air of a coal mine is connected to a mixing device through a ventilation air shaft and a ventilation air guide channel, low-concentration gas enters the mixing device through a gas conveying pipeline, and the ventilation air and the low-concentration gas are mixed in the mixing device; the mixing device is connected to a regenerative oxidation device through an air inlet pipeline, high-temperature flue gas generated by the regenerative oxidation device is connected to a generator set through an air outlet pipeline, low-temperature flue gas generated by the regenerative oxidation device is connected to a chimney and a hot air recycling pipeline respectively, and a hot air fan conveys the low-temperature flue gas to the ventilation air guide channel; a PLC control system comprises an air flow monitoring part and a linkage shutdown anti-backflow and explosion prevention part. The device can realize linkage of the hot air fan and the regenerative oxidation device, and can cool the hot air fan after an emergency stop; and the device can also be used for preventing ventilation air carrying coal dust from flowing back into the hot air recycling pipeline, and essentially solves the problem of explosion source of a hot air recycling system.

The application provides a coal quality improving and caking enhancing dust inhibitor and a preparation method thereof. Through synergistic effect of components, the coal quality improving and caking enhancing dust inhibitor can not only form a tough solidified film on the surface of coal, effectively inhibit dust flying and reduce coal loss, but also improve apparent calorific value of coal and improve coal quality through catalytic oxidation and pore filling mechanism. A composite wetting system can significantly reduce surface tension of a solution, and enhance the penetration and wrapping capacity of coal dust. A bonding system can form a solidified film with a three-dimensional network structure, and provide excellent wind erosion resistance and mechanical strength. Meanwhile, the quality improving and caking enhancing system can form a dense oxidation layer by catalyzing oxidation of light components on the surface of coal, and adsorb moisture, thereby reducing volatile loss and improving the calorific value of coal. In addition, the use of auxiliary components ensures the stability and environmental friendliness of the product under different environmental conditions. The preparation method is reasonable in process design, the product is stable in performance, and is suitable for industrial production.