252 results about "Dust explosion" patented technology

The invention discloses a CFD-based dust explosion calculation method, and particularly relates to the technical field of dust explosion risk assessment. Firstly, initial dust parameters of a target scene are obtained, then a three-dimensional computational domain is established in combination with a geometric structure, ventilation conditions and obstacle distribution, and a dust deposition area is marked; constructing a gas-solid phase coupled dust explosion solving equation set in the CFD framework; outputting time sequence data of pressure, temperature, speed and dust concentration in the whole explosion process, and generating a risk grade distribution diagram based on the maximum explosion pressure and flame coverage time; according to the invention, the propagation and damage process of dust explosion can be accurately reproduced, the simulation precision and efficiency are improved, and the evaluation result can directly guide protection design and safety management.

The invention discloses dust removal equipment for dust explosion prevention and a dust removal method thereof, and relates to the field of dust removal equipment.The dust removal equipment comprises a dust removal box, a plurality of dust removal cloth bags in the dust removal box and a treatment mechanism for dust explosion prevention, the treatment mechanism is composed of a gas mixing assembly, a scraping assembly and a vibration assembly, and a filter bag top frame is connected with a vibration pipe frame through the vibration assembly; the gas mixing assembly is communicated with the dust removal box through a gas inlet pipe, the gas mixing assembly is used for mixing dusty gas and inert gas and preliminarily removing large-particle dust, and the scraping assembly is arranged below the gas mixing assembly and scrapes the filtered large-particle dust; and the vibration assembly is used for periodically vibrating the dust removal cloth bag after the scraping assembly is detached so as to remove fine dust attached to the inner wall of the dust removal cloth bag. Inert gas is introduced and fully mixed before entering the dust removal box, and primary large-particle dust is filtered, so that the oxygen concentration is reduced, and dust explosion is effectively prevented.

The invention discloses an integrated thermal management system for an explosion-proof charger, and relates to the technical field of chargers. Comprising the following steps: S100, three-dimensional thermal field modeling: acquiring a heat source point cloud by using a laser radar and a temperature sensor array, and constructing a three-dimensional thermal management model in combination with finite element analysis; the liquid cooling pipeline layout is optimized through three-dimensional thermal field modeling (the error of heat flow density uniformity is smaller than or equal to 10%), the integrated design of a ZL114A aluminum alloy shell and a micro-channel liquid cooling plate (the thermal resistance is reduced by 40%) is combined, a metal sealing structure of an IP68 protection grade and ExdIICT6 anti-explosion certification are matched, safe heat dissipation of the power device with the temperature smaller than or equal to 85 DEG C is achieved in the wide-temperature environment of-20 DEG C to 60 DEG C and the explosive environment of gas dust, and the safety of the power device with the temperature smaller than or equal to 85 DEG C is achieved. And meanwhile, the liquid cooling medium is intelligently managed through the conductivity sensor and the ion exchange resin filtering device, so that equipment faults caused by pollution are avoided.

The invention provides a dust explosion-proof early warning method and system, and relates to the technical field of safety monitoring and early warning, and the method comprises the steps: collecting and standardizing the multi-source data of a dust movement track, an airflow field and electrostatic potential distribution, calculating a vortex intensity index and a dust gathering trend coefficient, and constructing a multilayer neural network electrostatic coupling effect model, and nonlinear coupling mapping of dust concentration, electrostatic field intensity and vortex intensity is realized. And when the danger increment output by the model and the growth rate of the dust gathering trend coefficient exceed a preset threshold value, triggering dust explosion-proof early warning. Therefore, the risk change under the action of the electrostatic field can be detected, the recognition capability of abnormal working conditions and a coupling mechanism is remarkably improved, and the safety control level is greatly improved through early-stage accurate early warning and intelligent disposal of dust explosion hidden dangers.

The invention relates to the technical field of heavy calcium carbonate production and conveying, in particular to a heavy calcium carbonate production conveying frame. The invention provides a heavy calcium carbonate production conveying frame capable of preventing dust from flying. A heavy calcium carbonate production conveying frame comprises a supporting frame, a conveying assembly is installed on the supporting frame, a material blocking plate is fixedly connected to the surface of the conveying portion of the conveying assembly, the supporting frame is fixedly connected with a protective cover, the protective cover is connected with a feeding barrel, and a spiral feeding paddle is rotationally connected into the feeding barrel. According to the invention, the primarily crushed heavy calcium carbonate raw material is conveyed through the spiral feeding paddle, the falling speed of the crushed raw material can be slowed down, and the impact force during falling can be reduced, so that the dust flying caused by large impact force during falling can be avoided, the dust dissipation can be avoided, the dust density can be reduced, and the production efficiency can be improved. The risk of dust explosion is avoided, workers can be prevented from inhaling escaping dust, and the health of the workers is guaranteed.

The invention discloses a coal storage and transportation intelligent management method and system, relates to the technical field of intelligent management systems, and aims to solve the problems of lack of environment monitoring, scheduling decision lag, extensive safety response and serious data island in the prior art. The method comprises the following steps: collecting the physical state, environmental parameters and operation behavior data of a coal storage yard in real time through a distributed sensor network; constructing a three-dimensional dynamic digital twinborn model and inputting the model into a time sequence neural network to predict the risk of spontaneous combustion, collapse or dust explosion in the future; and generating a dynamic scheduling instruction in combination with the task priority and the equipment state, and triggering a multi-level security response mechanism. The system comprises a sensor network module, a data fusion modeling module, a risk prediction module, a scheduling optimization module, and a closed-loop control and safety response module. According to the scheme, safety early warning preposition, scheduling decision intelligent optimization and resource energy efficiency collaborative improvement in the storage and transportation process are achieved, and the response capability and operation reliability of the coal supply chain are remarkably enhanced.

The invention discloses a dust explosion dynamic blocking method based on multi-modal data fusion. The method comprises the following steps: S1, constructing five core accident trees; s2, collecting multi-source data of dust explosion in real time and preprocessing the multi-source data, and extracting a multi-dimensional feature vector containing temporal and spatial variation features; s3, converting the multi-dimensional feature vector into a real-time state vector of five core accident trees through an event activation rule, and completing multi-source data fusion; s4, according to the real-time state vector, calculating a top event probability of each accident tree by using a Monte Carlo simulation method, and then obtaining an accident tree dynamic coupling risk value through multi-tree coupling analysis; s5, according to the dynamic coupling risk value, using a spatial interpolation method and voxelization processing to obtain a normalized risk value, and generating a dynamic risk thermodynamic diagram; and S6, according to the risk value of each area in the dynamic risk thermodynamic diagram, determining the risk level of dust explosion, then carrying out multi-level interlocking control, and triggering a corresponding blocking strategy to realize dynamic blocking.

The invention discloses an experimental device and an experimental method for gas / dust explosion flame-shock wave superposition coupling effect and combustible medium explosion transition induced by gas / dust explosion flame-shock wave superposition coupling effect under multi-parameter influence. Comprising a visual explosion system, a gas leakage diffusion system, a powder leakage diffusion system, an ignition system, a gas supply system, a powder spraying system, a discharge system, a displacement regulation and control system, a data acquisition system, a synchronous controller and a program control and data acquisition system. According to the experimental device and the experimental method for the gas / dust burning flame-shock wave superposition coupling effect under the influence of the multiple parameters and the induced combustible medium burning explosion transition thereof, the action processes of mutual impact, superposition, coupling and the like of detonation / detonation head-on flame-shock wave under the multiple working condition parameters can be realized; and the experimental study on the process of inducing the leakage diffusion combustible medium explosion transition and the critical condition thereof fills the technical blank of the study on the explosion flame-shock wave coupling effect process and the secondary disaster evolution mechanism induced under the influence of multiple parameters.

The invention discloses a dust explosion flame free radical testing system and a testing method, belongs to the technical field of dust explosion testing, and solves the problem that existing testing equipment cannot realize visual testing of combustion flame free radicals at the initial stage of dust explosion ignition and in the development process. According to the solution, the test system comprises an explosion generation assembly used for generating single-side open type dust cloud explosion, an optical observation assembly used for observing flame free radicals, a control system, a computer and an air compressor, and semi-open type dust cloud is formed through the explosion generation assembly and is ignited and detonated; images of different free radicals changing along with flame are collected through the optical observation assembly, and visual observation, recording and analysis are carried out through the computer. The system has the advantages of being high in functionality, integrated in system, easy to operate and safe and reliable in experiment process and is suitable for various kinds of combustible dust, collected data can promote dust explosion mechanism research, and data support is provided for development of dust explosion optical early warning protection measures.

A positive and negative pressure integrated dust removal device for a dust explosion area is provided with a dust hood, an exhaust fan, a negative pressure air duct, a positive pressure blowing pipe, a positive pressure comb-shaped blowing opening, a comb-shaped part arranged on the positive pressure comb-shaped blowing opening and a dust filter bag. According to the dust collection device, the exhaust fan is arranged to extract air in the first cavity, so that negative pressure is formed in the negative pressure air duct, dust is sucked, the comb-shaped part guides air in the positive pressure air blowing pipe to face airflow blown out of the positive pressure comb-shaped air blowing opening, and the air in the negative pressure air blowing pipe is blown out of the negative pressure comb-shaped air blowing opening. The dust suction hood is arranged in the second cavity, so that dust in the opening is blown by airflow and limited in the second cavity by the dust suction hood, an exhaust fan is matched to extract the airflow in the negative-pressure air suction pipe, and the dust is sucked into the dust filter bag along the negative-pressure air suction pipe, so that the suction force at the inlet end of the negative-pressure air suction pipe is improved, and the dust in the covering area of the opening is removed.

The invention discloses raw material grinding equipment for preparing dry powder fracturing fluid in the technical field of dry powder fracturing fluid processing, which comprises a pre-crusher and a gas mill, the lower end of the pre-crusher is connected with a spiral feeding pipe, the spiral feeding pipe can guide pre-crushed materials into the gas mill, a separator is arranged between the pre-crusher and the gas mill, and the separator is connected with the pre-crusher. A flow guide assembly is arranged among the pre-crusher, the air mill and the separator and comprises an air flow adjusting pipe, and the air flow adjusting pipe is located between the air mill and the separator; the heat dissipation pipe group penetrates through the pre-crushing machine, and gas in the separator can enter the pre-crushing machine through the heat dissipation pipe group; according to the dust removal device for the gas mill, low-temperature gas guided out of the gas mill is guided into the pre-crushing machine for heat dissipation in a speed reduction mode, cold energy waste caused by direct discharge of the low-temperature gas is avoided, dust in materials entering the gas mill is prevented from being brought away, and therefore the possibility of dust explosion of the gas mill is reduced.

The invention belongs to the technical field of dust removal equipment for textile workshops, particularly relates to high-efficiency dust removal equipment for textile workshops, and aims to solve the problems that dust attached to a dust removal assembly cannot be thoroughly removed and effective dust removal measures are lacked due to the fact that frequent shutdown is needed for cleaning in the prior art. The equipment is provided with two sets of dust removal assemblies which can be alternately used, exchange is achieved through a switching structure, in a removing structure, a reciprocating lead screw drives a lifting plate to move, air in the lifting plate is sprayed out through a hollow pipe and an air outlet disc, and the reciprocating lead screw further drives the hollow pipe to rotate and is matched with an arc-shaped sealing plate to form pulse airflow, so that the dust removal assemblies are comprehensively cleaned; the dust reduction structure injects filtered air into the water tank for humidification and then is used for removing dust, so that the dust is rapidly reduced, and the equipment can improve the dust removal efficiency, avoid frequent shutdown of the equipment, effectively remove the dust, reduce the risk of dust explosion and guarantee the production safety of a textile workshop.

The invention discloses a dust explosion risk prediction method, system, device and program, and relates to the technical field of industrial safety and disaster prevention and control, and the method comprises the steps: obtaining spectral data corresponding to time-space coordinates in a to-be-detected region; the spectral data comprises wavelength and intensity; elements contained in the dust and chemical concentrations of the elements are obtained based on the element recognition model and the spectral data; reconstructing a three-dimensional concentration field to obtain the spatial concentration of each element in voxels; and performing explosion risk dynamic coupling based on the elements contained in the dust, the chemical concentrations of the elements and the three-dimensional concentration field to obtain an explosion probability index. Through the treatment scheme disclosed by the invention, the dust explosion risk can be predicted in advance, small-range accurate explosion suppression can be realized, the safety is improved, and the explosion suppression cost is reduced.

A dust explosion detection early warning device disclosed by the present invention comprises a rapid mounting seat, a mounting block, a dust treatment device, a rotating rod and a dust concentration detection unit, the lower end of the dust treatment device is fixedly connected with a warning indicator, the middle part of the upper end of the dust treatment device is fixedly connected with the mounting block, and the mounting block is detachably connected to the middle part of the lower end of the rapid mounting seat. A flange plate is fixedly connected to the upper end of the quick mounting seat, rotating rods are uniformly arranged on the periphery of the dust treatment device, one end of each rotating rod is rotationally connected to a rotating seat, the rotating seats are fixedly connected to the edge of the lower end of the dust treatment device, and buckle seats are fixedly connected to the dust treatment device above the rotating seats; the upper middle portions of the rotating rods are connected into the buckle bases in a buckled mode, and the other ends of the rotating rods are fixedly connected with dust concentration detection units. The invention aims to provide the dust explosion detection early warning device which is convenient to disassemble and assemble, has multi-direction detection and is efficient in dust treatment.

The invention relates to the technical field of dust removal equipment, in particular to a multi-stage dust removal device for a grain dryer and a dust removal method.The multi-stage dust removal device comprises a shell, a water tank, a rotating shaft, a demisting cover, a demisting component, a bag-type dust remover, a sealing baffle, a triggering component, a switching rotating shaft, a stirring component, a pulse cylinder, a pulse piston and a pulse part; gas guided out of the dryer is introduced into the water tank for water cooling, water vapor is removed through the demisting cover and the demisting component, and the cooled and dehumidified gas is further subjected to fine dust removal through the bag-type dust collector and then is exhausted. The bag-type dust collector is communicated with the water tank after a certain dust weight is accumulated through the trigger component, pulse cleaning of the bag-type dust collector is realized through cooperation of the stirring component and the pulse piston, and the cleaned dust is discharged after being mixed and stirred with liquid in the water tank, so that the dust in flue gas is conveniently mixed and cleaned; the dust explosion risk caused by dust raising during cleaning is prevented.

The invention relates to the technical field of flour dust falling, in particular to flour mill dust falling equipment and a using method thereof.The flour mill dust falling equipment comprises a middle shell, dust falling boxes are fixedly connected to the two sides of the middle shell, and dust collection bins used for alternately collecting dust and compressing are arranged on the surfaces of the outer sides of the dust falling boxes; the top surface of the dust falling box is provided with a dust falling nozzle for increasing the weight of sucked dust mist, the inner side surface of the middle shell is provided with a driven trigger piece for synchronizing the movement process of each component, and the outer side surface of the dust falling box is provided with a dust collection baffle for guiding airflow to enhance the adsorption range; according to the dust falling device for the flourmill, suspended dust is rapidly converted into settleable particles through a closed-loop process of double-side alternate dust collection, compression granulation and synchronous spraying weight increment in function, and the suspension condition required by dust explosion is cut off from the source; the whole process is closed, secondary diffusion is avoided, additional pump valves and electric control elements are not needed, energy consumption is low, and fault points are few.

The utility model discloses an improved gas dust explosion pipeline testing device in the technical field of gas dust explosion testing, which comprises an explosion ignition assembly and a data acquisition control assembly, the other side of the explosion ignition assembly is respectively provided with a dust spraying assembly and a product collecting assembly, and the product collecting assembly comprises a closed control valve. The side, away from the explosion ignition assembly, of the closed control valve is connected with a gas taking control valve and a vacuumizing control valve, the end, away from the closed control valve, of the gas taking control valve is sequentially connected with a dust collector and an air bag, and the end, away from the closed control valve, of the vacuumizing control valve is connected with a vacuum pump. According to the utility model, the closed control valve, the gas taking control valve, the dust collector, the air bag, the vacuumizing control valve and the vacuum pump are arranged in a matched manner, so that gas can be collected by the air bag, powder can be collected by the dust collector, the problem that explosion gas and powder are difficult to automatically collect is solved, and the content of experimental research is widened.

The invention relates to the technical field of mine lighting, in particular to an intelligent mining intrinsically safe LED lighting lamp strip and a lighting system.The lamp strip comprises an insulation assembly, a plug-in assembly and a lighting assembly, and the system comprises a production judgment module, a light attenuation judgment module, a lighting regulation and control module, a regulation and control detection module, a shadow judgment module and a shadow compensation module; the system predicts a high-dust working condition through vibration analysis and evaluates light attenuation by fusing dust concentration and coal rock absorbance; regulating and controlling the brightness and spectrum of the lamp strip according to the evaluation result; the regulation and control effect is verified through closed-loop detection; identifying a dynamic shadow area based on the equipment pose and the light field distribution; and finally, in combination with the gas concentration safety constraint, performing safety-first local compensation or brightness-first overall brightening on the shadow area. The problems that instantaneous light attenuation caused by cooperation of dust outbreak at the moment of cutting and strong light absorption of a coal wall cannot be effectively handled, and dynamic shielding shadow caused by movement of a huge machine body of mining equipment cannot be effectively handled are solved.

The utility model relates to a dust explosion protection system for a chemical workshop. The dust explosion protection system comprises a dust removal assembly and a spraying assembly, the dust removal assembly comprises a dust removal box, an air inlet pipe and an air outlet pipe are connected to the dust removal box, a filter cloth frame and a screen plate are installed on the inner wall of the dust removal box, a plurality of pieces of filter cloth are connected between the filter cloth frame and the screen plate, an exhaust fan is installed in the dust removal box, a transmission rod penetrates through the center of the exhaust fan, and a driving motor is installed on the outer side of the dust removal box; a worm is in butt joint with the driving motor, a turbine is meshed with the worm, and the turbine is in butt joint with the transmission rod; the spraying assembly comprises a piston pump, a water inlet pipe and a water outlet pipe are in butt joint with the piston pump, the piston pump comprises a pump shell, a rotary disc is installed in the pump shell, a connecting rod is hinged to the rotary disc, a piston is hinged to the connecting rod, a rotary shaft penetrates through the center of the rotary disc, a first gear is in butt joint with the rotary shaft, a second gear is meshed with the first gear, and the second gear is in butt joint with a worm. And the driving motor can drive the piston pump to operate while driving the draft fan to operate.

The utility model discloses a dust recovery device for nonmetallic mineral product manufacturing, which comprises a material collecting bin and a cleaning part, the bottom end of the material collecting bin is provided with the cleaning part, the top end of the material collecting bin is fixedly connected with a feeding pipe, one side of the outer wall of the material collecting bin is fixedly connected with a discharging pipe, and the other end of the discharging pipe is fixedly connected with a negative pressure device. According to the dust recovery device for nonmetallic mineral product manufacturing, through cooperation of a material collecting bin, a cleaning part, a feeding pipe, a discharging pipe, a negative pressure device, a filter element and a cleaning mechanism, a transverse barrel and a vertical plate can rotate, two transverse rods revolve around the vertical plate as the center, cleaning brushes arranged on the outer walls of the transverse rods can clean the outer wall of the filter element, and the dust recovery effect is improved. According to the cleaning device, a negative pressure device with a blowback function is not needed to be used for achieving cleaning, the summer cost of the device is reduced, in addition, the dust explosion phenomenon caused by blowback does not need to be worried about in the cleaning process, secondary pollution to the surrounding environment cannot be caused, and the practical performance is enhanced.

The present application relates to the technical field of high-moisture organic solid waste drying, and particularly relates to a drying method of high-moisture organic solid waste. The technical scheme can provide carbon source for target bacteria, support water diffusion channels between solid waste blocks formed by high-moisture organic solid waste, diffuse non-bound water surrounded by multiple solid waste blocks from the water diffusion channels, degrade organic matters in the high-moisture organic solid waste, increase porosity and specific surface area of the high-moisture organic solid waste, and keep the temperature of the sunlight shed and the temperature of the target mixture in the drying process below 50 DEG C, which can ensure good living conditions of the target bacteria and reduce the risk of dust explosion caused by the increase of dust concentration in the late drying period due to the introduction of target organic matter. The target mixture receives sunlight radiation, continuously turns over and is driven by a fan, so as to realize drying of the high-moisture organic solid waste.

The invention relates to a construction waste crushing bin dust explosion suppression device which comprises a crushing bin body, a control panel arranged in the center of the front end face of the crushing bin body, an upper cover arranged in the center of the upper end face of the crushing bin body, a feeding hopper arranged in the center of the upper end face of the upper cover, and a pressure relief structure arranged on the upper portion of the center of one side wall of the crushing bin body. An explosion suppression spraying structure is arranged on the lower portion of the center of one side wall of the crushing bin body, an explosion suppression structure is arranged on one side wall of the crushing bin body at the upper end of the explosion suppression spraying structure, and a detection structure is arranged in the center of the interior of the crushing bin body. The explosion suppression device has the beneficial effects that when explosion danger occurs, high-pressure gas and part of dust can be quickly discharged through the pressure relief structure to reduce the pressure in the bin, explosion suppression powder is released through the explosion suppression structure to suppress the combustion reaction after flames are detected, and the explosion suppression spraying structure adsorbs dust, reduces the temperature and inhibits flame spreading by spraying water mist; and the explosion suppression effect and the safety are improved.

The invention relates to the technical field of dust explosion prevention in the textile industry, in particular to a dust explosion prevention method and system in the textile industry and a storage medium. The explosion-proof method comprises the steps that a bus communication architecture based on a two-wire system power line carrier is constructed, a multi-host communication mode adopting a private protocol is established between a controller and a plurality of detection probes, and a message structure of the private protocol comprises a function code field, a number field, a data field and a CRC verification field, wherein the function code field definition comprises 01H alarm coding, 02H parameter modification coding and 03H heartbeat request coding. According to the invention, a multi-host communication architecture based on a private protocol is constructed, dynamic distribution of bus control right and dust flow feature detection are deeply coupled, and a zero-latency master-slave switching mechanism when an alarm event is triggered is realized.

The utility model discloses a dust explosion-proof device, which relates to the technical field of explosion-proof devices, and comprises pipelines and a device body arranged between the pipelines, and the device body comprises a front explosion-proof piece and a rear explosion-proof piece; the front anti-explosion piece comprises a sealing cover, a first-stage transmission rod, a second-stage transmission rod, a third-stage transmission rod, a fixing rod and a driving rod, the sealing cover is vertically and movably arranged in the front anti-explosion piece, the first-stage transmission rod, the second-stage transmission rod, the third-stage transmission rod and the driving rod are sequentially hinged, and the other end of the driving rod is hinged to the front anti-explosion piece; the fixing rod penetrates through the transmission rod and is arranged in the front anti-explosion piece, and the secondary transmission rod is vertically arranged in the device body in a sliding mode. According to the dust explosion-proof device provided by the utility model, the front explosion-proof piece comprising the sealing cover, the first-stage transmission rod, the second-stage transmission rod, the third-stage transmission rod, the fixed rod and the driving rod is arranged, so that the size of the first-stage inlet is adjusted, and the content of dust entering the device body and the airflow speed are adjusted.

The present invention discloses a dust collection device for drying polyester fibers, specifically relating to the technical field of dust collection, comprising a housing, an air inlet 1 being provided at the rear end and in the middle of the housing, a filter assembly 1 being provided inside the housing, a dust collection assembly being provided on the lower side of the filter assembly 1, a position limiting assembly being provided on the lower side of the filter assembly 1, a spray assembly being provided on the right side of the dust collection assembly, and a filter assembly 2 being provided on the upper side of the filter assembly 1. The present invention improves the overall dust collection efficiency and reduces dust emission through the use of the filter assembly 1 and the filter assembly 2. At the same time, when the filter assembly 1 separates the dust, the dust collection assembly, the position limiting assembly and the spray assembly simultaneously collect, squeeze and cool the dust, thereby suppressing dust from flying, facilitating subsequent collection and processing, and reducing the risk of dust explosion and the pollution of the environment by dust.

The utility model discloses a coal mine mining and transporting device, and particularly relates to the technical field of coal mine transportation, the coal mine mining and transporting device comprises a scraper transmission mechanism, the scraper transmission mechanism comprises a chain, the side wall of the chain is connected with a plurality of scrapers, and a first outer shell and a second outer shell are arranged outside the chain and the scrapers. A supporting frame is arranged on the first outer shell and the second outer shell, a dust removal mechanism is arranged above the supporting frame, and the dust removal mechanism comprises a pulverized coal conveying pipe arranged above the supporting frame; according to the utility model, the dust removal mechanism is arranged and is fixed above the scraper transmission mechanism, so that coal dust emitted by coal mine stones in the scraper transmission mechanism can be sucked into the coal dust conveying pipe in time, the coal dust can be conveyed to the ground, and the danger of dust explosion in a coal mine tunnel is effectively reduced; therefore, the safety of workers in the coal mine tunnel is improved.

The invention discloses a graded inerting device and method based on dynamic risk discriminating.The device comprises a continuous inerting system, a dust removal system and an efficient inerting system, the dust removal system comprises a dust removal main pipeline and a dust remover which are connected, the continuous inerting system comprises an inerting dust bin and feeding equipment, and the feeding equipment is connected with the dust removal main pipeline; the efficient inerting system comprises an efficient inerting powder tank; and the efficient inerting powder tank is connected with a dust remover. According to the method, the continuous inerting system and the efficient inerting system are used in a combined mode, the explosion risk of the main dust removal pipeline can be reduced through the continuous inerting system under the condition that the dust remover does not break down, and meanwhile the combustible dust explosion risk caused by the fault of the dust remover can be effectively controlled; the efficient inerting system is only triggered under the abnormal condition that the dust concentration of the dust remover is abnormally increased or explosion is generated, so that the energy consumption of fixed threshold inerting and the consumption of an inerting medium are effectively reduced, and more efficient inerting is realized.

This application discloses a dust recovery device for a grinder. The grinder includes a housing, within which a working chamber is formed, and a dust collection port connecting the working chamber to the outside is provided. The dust recovery device includes a collection tray and a flushing system. The collection tray includes a dust settling section and a discharge section. The dust settling section is located on the bottom surface of the working chamber and forms a dust settling trough. The discharge section is connected to the dust settling section and extends outside the housing through the dust collection port. The discharge section forms a discharge trough communicating with the dust settling trough. The flushing system is configured to flush the dust in the dust settling trough out of the housing through the discharge trough. The dust recovery device provided by this application prevents dust from being stirred up by vibration or other reasons by flushing the dust in the dust settling trough out of the housing through the discharge trough, thereby avoiding the formation of dust clouds, which helps to prevent dust explosions and improves equipment safety.

The present invention provides an explosion-proof system and control method for a rotary sludge drying device, which relates to the technical field of sludge treatment and aims to solve the problem that sludge is prone to explosion during the drying process in the existing drying device. The explosion-proof system for the rotary sludge drying device includes a main body of the drying device, a steam delivery pipeline, and a control system. The steam delivery pipeline is connected to the main body of the drying device, and a steam control valve is arranged on the steam delivery pipeline. A sludge inlet, a sludge outlet, a flue gas inlet, and a flue gas outlet are respectively arranged at both ends of the main body of the drying device. The flue gas outlet is connected to an exhaust pipeline, and an exhaust fan is arranged on the exhaust pipeline. A humidity sensor and an oxygen content detector are arranged at one end of the exhaust pipeline close to the flue gas outlet. The humidity sensor, the oxygen content detector, and the steam control valve are all connected to the control system. The explosion-proof system for the rotary sludge drying device of the present invention can reduce the risk of dust explosion, ensure the safe operation of sludge during the drying process, and ensure the safety of personnel.

The present application relates to the technical fields of dust explosion prevention, and discloses a visual adjustable flameless explosion relief experimental device, which comprises an explosion reaction container, an explosion relief assembly, a safety assembly and a controller; the explosion reaction container is electrically connected with the controller; the safety assembly is a rectangular box body, one side plate of which is provided with an inlet, and the bottom plate is provided with an outlet; the explosion relief assembly is a rectangular box body with a right opening, the left side plate of which is provided with an air inlet, and the right opening is provided with a flange; the air inlet is sealingly connected with the explosion relief port of the explosion reaction container, and the inlet is connected with the upper half of the flange; the explosion relief assembly is provided with a transparent observation window, and the inside of the explosion relief assembly is detachably provided with an adjustable fire-retardant structure. The present application can observe and record the quenching process of the explosion relief flame, facilitate the evaluation of the fire-retardant performance of the fire-retardant material, inhibit the propagation of the dust explosion relief flame, avoid the occurrence of secondary explosion accidents in the surrounding environment, improve the safety of the explosion relief experiment, and has a simple structure and an adjustable fire-retardant structure position.