467 results about "Spontaneous combustion" patented technology

The invention relates to the technical field of immersed temperature control and thermal runaway prevention of a power battery of a new energy automobile. The technical problems to be solved are clearly reflected that the non-uniform heat dissipation and spontaneous combustion of the power battery are two technical problems of a new energy automobile, and the technology provided by the invention can enable the heat dissipation of the power battery to be good and prevent spontaneous combustion. The technical scheme for solving the problem is characterized in that a buffer material is used for protecting the bottom of a battery pack, a circulating temperature control system is filled with fluorinated liquid, elements such as battery cells in the battery pack are soaked in the fluorinated liquid, and according to the temperature requirement of the battery cells, the fluorinated liquid exchanges heat with a heat pump system, a heater and a driving motor, so that the battery pack is heated. The fluorinated liquid is recycled to raise or lower the temperature of elements such as the battery pack. When the battery cell is abnormally high in temperature or thermal runaway, the battery cell is extinguished and cooled by means of quick discharge, water injection into the battery pack and the like. The device is used for heating or circularly cooling elements such as a power battery and preventing spontaneous combustion of a power battery pack.

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 application belongs to the field of park unmanned inspection safety monitoring, and specifically discloses a park unmanned inspection safety monitoring system based on intelligent property, which comprises the following steps: acquiring a UAV inspection path by counting each missing space and each intersection space in a park, and discovering safety hazards in hidden spaces in the park in a timely manner; acquiring a redundant material heat conductivity index in each key space and an overlapping area of the redundant material heat conductivity index and an illumination area, evaluating a cumulative spontaneous combustion effect index between the redundant material heat conductivity index and a meteorological environment, combining a pollution rate of the redundant material in each key space, analyzing a safety coefficient of the redundant material in each key space, and helping to discover spontaneous combustion risks and environmental pollution problems in a timely manner; analyzing priority weight values of each passage path to which each key space belongs, determining a UAV inspection optimized path, and further optimizing the inspection optimized path by extracting historical inspection data, so that the UAV inspection path is more in line with actual requirements of the park.

The utility model discloses a safety type active water molecule electrolysis device which comprises a shell with an air flow channel, a membrane electrode assembly is arranged in the shell, the membrane electrode assembly divides the air flow channel into an air inlet end and an air outlet end, the anode side of the membrane electrode assembly faces the air inlet end, the cathode side of the membrane electrode assembly faces the air outlet end, and the air outlet end faces the air outlet end. The air inlet end is provided with a pure iron foil for air flow to pass through, the pure iron foil absorbs oxygen generated by electrolyzing water molecules on the anode side of the membrane electrode assembly, and the exhaust end is provided with an ePTFE microporous breathable protective film. Through the mode, the safe active water molecule electrolysis device and equipment can absorb oxygen in the equipment, so that the oxygen content is in a lower state, the corrosion damage of oxygen-enriched atoms is avoided, and the spontaneous combustion risk caused by over-high internal oxygen concentration is avoided.

The invention relates to the technical field of battery safety, and provides a battery spontaneous combustion protection system and method based on a safety curve. The system comprises a battery data acquisition unit, a safety curve storage unit, a risk assessment unit, an execution control unit and an event recording and notification unit. The residual capacity, the internal resistance, the temperature, the cycle index and the charge state of the battery are collected in real time, the data and a safety curve provided by a battery manufacturer are subjected to normalization analysis, a risk score is calculated based on a multi-parameter weighting algorithm, and a risk grade is generated. The system executes a hierarchical protection strategy according to the risk level, including risk prompting, charging current limiting, charging disabling, discharging power reducing or output disconnecting, and executes soft turn-off before disconnection to reduce energy impact. The system has cloud updating and data returning functions, can automatically generate alternative thresholds when a safety curve is missing or abnormal, realizes early recognition and active protection of the spontaneous combustion risk of the battery, and remarkably improves the safety and reliability of the system.

The invention is applicable to the technical field of conveying belts, and provides a macromolecular flame-retardant conveying belt which comprises a mounting frame, a transmission roller and a guide roller, and the transmission roller and the guide roller are rotationally mounted on the mounting frame; the conveying belt is arranged on the transmission roller in a sleeving mode and used for conveying materials, the conveying belt makes contact with the guide roller, the conveying belt is composed of upper covering rubber, a bonding layer, a belt core framework and lower covering rubber, and the belt core framework is located between the upper covering rubber and the lower covering rubber and firmly bonded through the bonding layer. According to the high-molecular flame-retardant conveying belt, lump coal with high value and pulverized coal with low value are separated in real time at the conveying front end, value loss caused by mixed transportation is avoided, graded utilization of resources is achieved, and meanwhile through the arrangement of the conveying belt, atomization dust falling, a dust cover, spontaneous combustion monitoring, fixed-point fire extinguishing and the like, the conveying efficiency is improved. And dust pollution and fire risks are effectively reduced, and the working environment is improved.

The invention discloses a coal conveying and dust removing system suitable for easily self-fired coal, and particularly relates to the field of dust removal, the coal conveying and dust removing system comprises a multi-dimensional parameter acquisition and processing module, a dust raising risk grading module, a dust removing mode dynamic selection module, a dust removing core parameter quantitative regulation and control module and a real-time feedback iteration module; the multi-dimensional parameter collecting and processing module is used for collecting multi-dimensional data and marking the temperature close to the spontaneous combustion critical temperature and the high-concentration dust raising state; the flying dust risk grade division module is used for calculating a flying dust comprehensive risk index according to the parameters acquired through coupling and dividing risk grades according to the value of the flying dust comprehensive risk index; according to the method, dust raising risk grades are divided through multi-dimensional parameter acquisition, dust removal modes are dynamically selected in combination with particle characteristics of different transfer links, core parameters are quantitatively regulated and controlled, and the problems that dust raising characteristics of different transfer links are not distinguished, and the local dust removal efficiency is insufficient or energy consumption is wasted due to the adoption of unified parameters are solved.

The invention relates to the technical field of automobile battery fire prevention, and mainly discloses an anti-spontaneous combustion fire-retardant battery which comprises a battery shell, a plurality of battery packs are arranged in the battery shell, a plurality of pressure relief holes are further formed in the battery shell, and fire barriers are further arranged on the pressure relief holes; the flame arrester comprises a plurality of layers of barrier covers, a flame arresting disc is further arranged at the joint of the barrier covers and the pressure relief hole, and a flame arresting seam is formed in the flame arresting disc; wherein the barrier covers are provided with a plurality of flow-through hole layers in the flow measuring direction of the combustion medium, the flow-through hole layers in every two adjacent barrier covers are arranged in a staggered manner, and the flow-through hole layers and the fire-retardant seams are communicated with the inner space and the outer space of the battery shell, and the technology that after thermal failure of the battery, safe pressure relief can be achieved, and flames can be prevented from spreading outwards can be achieved.

The invention belongs to the technical field of power equipment, and discloses an internal fire prevention and spontaneous combustion prevention integrated energy-saving power distribution control cabinet which comprises a power distribution cabinet, a sealing door and ventilation openings formed in the power distribution cabinet at equal intervals, and further comprises a pressure box installed at the top of a cavity of the power distribution cabinet and used for storing carbon dioxide, and an infrared flame detector and a visual sensor are fixedly mounted at the bottom of the pressure box. According to the scheme, when the infrared flame detector and the visual sensor are used for detecting that electric appliance elements in the power distribution cabinet are in fire, the electromagnet is powered off, the inner plate is pushed to move outwards under the action of pressure in the pressure box and the flow guide plate, and carbon dioxide sinks in the power distribution cabinet under the guidance of the inclined plane; and the carbon dioxide is adopted to replace a dry powder extinguishing agent, so that the protection effect of the device on electrical components in the power distribution cabinet is improved.

The invention provides a method and system for evaluating the spontaneous combustion risk of a fire in a confined space, and relates to the technical field of fire evaluation, and the method comprises the steps: constructing a ceiling impact fire model based on the confined space, the optimized discretization parameters of the ceiling impact fire model are determined by simulating and verifying free fire plume based on an open space in advance; based on the ceiling impact fire model, performing numerical simulation under various ventilation limitation degrees and various heat release rates to obtain a simulation result; based on the simulation result, extracting concentration distribution data and flue gas temperature distribution data of unburned fuel at the ceiling position; and comparing the concentration distribution data of the unburned fuel and the flue gas temperature distribution data with corresponding combustion thresholds, and evaluating the spontaneous combustion risk of the limited space according to a comparison result. According to the invention, the assessment of the fire spontaneous combustion risk can be accurately quantified, and the serious dependence on artificial experience is avoided.

The invention discloses a coal mine goaf low-temperature nitrogen fire preventing and extinguishing technology integrating intelligent monitoring and control, and belongs to the technical field of coal mine goaf fire preventing and extinguishing. The system comprises a ground nitrogen making machine, a ground monitoring center, an underground nitrogen cooling device, an intelligent monitoring module and a PLC intelligent control module. The nitrogen cooling device comprises a plate heat exchanger, a variable-frequency single-screw compressor, an air-cooled condenser, a liquid storage tank and an electromagnetic control valve which are connected in sequence; the intelligent monitoring module comprises a sensor unit and a communication transmission module; the PLC intelligent control module comprises a core controller, a man-machine interaction unit and a remote transmission unit; and the PLC intelligent control module automatically controls the start and stop of the system according to a preset three-level fire prevention and extinguishing threshold value, and dynamically adjusts the cooling temperature and the refrigerating capacity. According to the invention, 'monitoring-regulation-feedback 'closed-loop intelligent control is realized, an efficient and safe fire prevention and extinguishing technical support is provided for a special mining period of a mine easy to spontaneously ignite, and the system adapts to an underground complex environment.

Provided is a simulation device and method for an entire process of fire initiation of a mining belt. The simulation device includes: a workbench, a fixing belt clamp, a sliding belt clamp, heat source assemblies, a traction rope, a traction assembly, a high-speed camera, goose neck pipes, and a multi-parameter sensor. The simulation method includes: clamping a belt sample; selecting five monitoring points from the belt sample, and extending five goose neck pipes to the corresponding monitoring points; reckoning heat required for a heating and spontaneous combustion process of the belt sample, and reversely reckoning power supply parameters; sprinkling coal samples on the belt sample, switching on a power source of the heat source assemblies for heating the belt sample, and acquiring temperature, flue gas components and image data; and analyzing the data, and summarizing a temperature distribution rule of the belt sample and a gas generation rule.

The application discloses an automatic control method for fire prevention and extinguishment in a mine, which comprises the following steps: establishing an automatic control system for fire prevention and extinguishment, wherein the automatic control system for fire prevention and extinguishment comprises a nitrogen injection and grouting system, a control center and temperature sensors, oxygen concentration sensors and CO concentration sensors which are arranged in a continuous moving mode and follow a coal mining face, the temperature sensors, the oxygen concentration sensors and the CO concentration sensors are connected to the control center through a CAN data bus, the control center is connected to a nitrogen injection machine and a grouting machine of the nitrogen injection and grouting system through a PLC controller via the CAN data bus, the automatic control method for fire prevention and extinguishment is provided for unmanned operation mining of coal, and the method has the advantages of high practicability, convenient operation and safety. In the case of a spontaneous combustion sign, the method can remotely and quickly give a warning and take action to prevent a fire, the reaction time of the method is short, and the method can be completed in 5 minutes, all operations can be remotely performed, and the safety of personnel is ensured.

The utility model relates to mechanical engineering technical field field discloses a fireproof cable bridge, including base, the inner wall of base is equipped with two installation grooves, the inner wall of two installation grooves is provided with temperature sensing element, the outer wall of temperature sensing element is fixedly connected with baffle, the inner wall of base is equipped with two storage tank, the outer wall of base is equipped with a plurality of fixed slots, the outer wall of base is installed for the connecting device of connection. In the utility model, when the fire needs to be extinguished and fire -retardant, after temperature sensing element senses high temperature, internal thermal expansion liquid expands rapidly and breaks its outer wall, makes baffle fall down and slides out of storage tank along installation groove, makes the fire -retardant material in the groove slide into base and cover cable. If the cable is spontaneous combustion, the fire -retardant material insulates oxygen and extinguishes the fire, forms the protective layer when the outside is on fire and protects the cable, and the structure is simple and reliable, relies on thermal expansion physical principle and mechanical structure linkage, reduces the failure risk.

The invention belongs to the technical field of routers, and particularly relates to a router with strong signal penetrating power, which comprises a router main body and a sliding frame, the sliding frame is slidably connected with a storage part, the storage part is slidably connected with a contact part, the contact part is provided with a plurality of air holes, the contact part is slidably connected with a connecting part, and the connecting part is slidably connected with the router main body. Two fans with power sources are detachably connected to the connecting part through bolts, a temperature sensor is fixedly connected to the lower side of the contact part and can make contact with the upper surface of the router body, two inclined plates are arranged on the two sides of the contact part, and a pressure spring A is fixedly connected between the contact part and the storage part; the router further comprises two lower baffles connected to the lower side of the storage part in a sliding mode, a compressed spring B is fixedly connected between each lower baffle and the storage part, the two inclined plates can push the two compressed springs to move respectively, and the router can improve the heat dissipation effect and effectively avoid faults and spontaneous combustion.

The application discloses an oil injection rod and stabilizer integrated structure, which comprises a radial stabilizer, a circumferential stabilizer arranged on the radial stabilizer, a mounting seat arranged at a side end of the circumferential stabilizer, an I-way oil injection rod mounting seat, a II-way oil injection rod and a III-way oil injection rod arranged on the mounting seat, a plug and a plug arranged at a bottom end of the radial stabilizer, wherein the oil injection rod and stabilizer integrated structure is a multi-cavity and multi-hole complex hollow structure, and is provided with evaporation cavities, cooling cavities and fuel flow path cavities, and is provided with a plurality of oil injection holes, cooling holes and evaporation holes. The plug, the plug and the II-way oil injection rod and the III-way oil injection rod are connected through welding, and closed oil path cavities are formed in the inner cavities of the II-way oil injection rod and the III-way oil injection rod; the structure integrates multiple functions such as oil supply, combustion organization, on-duty flame, cooling and anti-spontaneous combustion of fuel oil, has multiple functions, and can work at a total temperature of 1450K in a thrust chamber and at a working temperature lower than 1300K, and is reliable in work.

The application discloses a kind of test methods for determining inhibitor performance index, belong to coal mine safety technical field;Specifically related to the detection of inhibitor inhibition rate, inhibition life performance index of inhibitor.The application comprehensively considers the change rule of CO, C2H4 and C2H2 three gases in the process of coal oxidation spontaneous combustion and its advantages and disadvantages as index gas, combined with traditional test method, respectively calculate the inhibition rate of inhibitor in the whole stage of oxidation spontaneous combustion and oxidation spontaneous combustion substage: slow oxidation stage, accelerated oxidation stage and intense oxidation stage, and introduce gas generation rate to describe the inhibition effect of inhibitor in each substage, obtain the inhibition performance and inhibition rule of inhibitor in the whole process of oxidation spontaneous combustion;In the application, the whole stage inhibition rate and inhibition life are combined, the inhibition effect of inhibitor can be more comprehensively evaluated, and the selection of inhibitor type and concentration by technical personnel in the process of coal seam mining can be widely used.

The utility model relates to the technical field of coal mine safety, and discloses a goaf spontaneous combustion fire preventing and extinguishing structure. The goaf spontaneous combustion fire preventing and extinguishing structure comprises a device structure assembly, the upper end of the device structure assembly is connected and provided with an air exhaust structure assembly, the upper end of the air exhaust structure assembly is connected and provided with an air return shaft, the rear portion of the upper end of the air return shaft is fixedly provided with an air exhaust opening, and the interior of the air exhaust opening is connected and provided with a device frame; the device frame is internally connected with an exhaust fan, the front end of the air return shaft is connected with a high-temperature pipeline, the goaf is effectively prevented from serving as a high-risk area of natural ignition of an underground coal seam, the goaf is the key point of coal mine prevention and control, and due to the fact that the occurrence process of a fire disaster is slow, no obvious flame exists, and the fire disaster is not easy to perceive; the technical problems that the precise position of a fire source cannot be found in time in the follow-up process, certain losses are generated in the follow-up process, and large-area spontaneous combustion is difficult to control and take measures for treatment when a fire disaster is found are solved.

The present application provides a kind of spontaneous combustion coal gangue aggregate concrete and the bonding slip test method of reinforcing steel, belong to building material performance test technical field, method includes: S1.existing test piece parameter and material characteristic actual measurement;S2.test equipment debugging and parameter setting;S3.loading test and original data acquisition;S4.based on the bonding slip data processing of fusion algorithm;S5.test result verification and analysis.The present application realizes the scientific quantification of spontaneous combustion coal gangue aggregate concrete and reinforcing steel bonding slip characteristics by closed-loop design and precision control, provides strong support for engineering application.

This invention belongs to the field of electricity metering technology, specifically a high-safety electricity metering box, including a box body and safety components. A meter is installed in the mounting chamber inside the box, and the meter is connected to the external power grid system via a connecting wire passing through the side wall of the mounting chamber. A storage chamber is located at the back of the box body, with a safety gap between the storage chamber and the mounting chamber. An information storage device is installed inside the storage chamber, and the information storage device is connected to the meter via a transmission wire. In the event of an overheating and spontaneous combustion accident involving the meter, this invention physically separates the mounting chamber containing the meter from the storage chamber containing the information storage device through the safety gap. A propulsion device is activated to move a movable plate downwards, physically severing the transmission wire, thereby completely isolating the information storage device and the meter. This prevents high-temperature flames from spreading along the transmission wire and threatening the information storage device, further reducing losses and ensuring information security.

This invention discloses a method and system for analyzing the energy changes of abrasives during mechanochemical processing using thermal imaging, relating to the field of machine vision technology. The method includes pre-processing the material to obtain a material precursor; laying the mechanochemically processed material product flat in an air-exposed environment for spontaneous combustion, and capturing thermal images of the burning material until it self-extinguishes; performing infrared image recognition on the infrared thermal imaging video, and calculating the energy based on the recognition results. The method of this invention transforms the uncertain black box model inside the ball mill jar into a deterministic energy model through thermal imaging and infrared image recognition technology, thus overcoming the black box problem of the mechanochemical ball milling process. By calculating the combustion energy from the image recognition results, the energy obtained by the abrasive in the mechanochemical ball milling method can be inferred, providing an effective experimental approach for the internal energy conversion process of abrasives processed by mechanochemical methods.

The invention discloses a spontaneous combustion safety protection structure for a power battery of a new energy automobile. The spontaneous combustion safety protection structure consists of a battery pack upper cover, a heated expansion material, a battery module, a heated softening material, a battery anti-falling safety rope, a heat-insulating high-temperature-resistant filler in the battery pack upper cover and a heat-insulating high-temperature-resistant anti-collision material at the bottom of the battery module. The battery modules of the automobile power battery are inversely placed in the battery compartment of the battery pack, when a single battery module is subjected to thermal runaway, the thermal expansion material between the upper cover of the battery pack and the battery modules is heated to expand, and the thermal runaway battery modules are downwards extruded and thrown out of the battery pack through expansion force generated by expansion; and meanwhile, the thermal expansion material can form a heat-insulating high-temperature-resistant layer in the battery compartment, and the thrown battery pack burns in a small scale at the bottom of the vehicle until the battery pack is extinguished. The whole process can be actively and spontaneously carried out under the condition that the whole vehicle is powered off. The thermal runaway event of the whole power battery is effectively avoided, and the'arm-breaking survival 'of the new energy automobile is realized.

This utility model provides an automatic dispensing device for lighters or matches via barcode scanning, belonging to the field of intelligent devices. It includes a rear compartment with a bar slot for storing items. A material-dispensing rod is located at the outlet of the bar slot. One end of the rod is connected to the spindle of a servo motor, and the other end is equipped with a sensor detection plate. A material-dispensing piece is positioned on the rod corresponding to the outlet of the bar slot. A channel allowing the material-dispensing piece to pass through is provided at a limiting baffle. A discharge port is located between the limiting baffle and the bar slot. This device is primarily designed for the automatic dispensing of lighters or matches. It uses an iron casing to effectively prevent damage from external forces and to prevent fires caused by ignition sources. It has fireproofing properties to avoid fires caused by spontaneous combustion. The internal motor drives the material-dispensing rod and piece to rotate via barcode scanning, removing the lighter or matchbox from its designated bar slot. Each scan drives the motor to rotate once, dispensing one lighter at a time. The device has a simple structure and good reliability and stability.

The present application provides a kind of inner slag discharging device and its slag discharging method, it includes high wear-resistant obturator, drill bit drill rod device, venturi water and drill slag dry-wet separator, the drill bit drill rod device is located in high wear-resistant obturator, drill slag dry-wet separator is connected with drill bit drill rod device by venturi water.The flow direction of drill slag can be changed by changing the running direction of slag discharging medium, so as to reduce the scouring, soaking and friction of slag discharging medium and drill slag on the hole wall, which is beneficial to the formation of drilling hole;It can achieve the purpose of point coring by achieving "falling and discharging simultaneously";Drilling cuttings can be well collected, which is beneficial to the civilized production of construction site and prevents dirtiness and disorder;If inert gas is used for slag discharging during construction, it can also achieve the purpose of inhibiting spontaneous combustion of coal seam.Through the above technical scheme analysis, the device is theoretically feasible and the operation is reliable, which provides good drilling quality for casing, greatly improves the success rate of drilling and casing and the extraction effect.

The utility model provides a bending-resistant cable for new energy automobile, which comprises a support frame, an elastic column, inner sheaths, an elastic layer, a bending-resistant layer, an outer sheath and wire core bodies, the elastic column is fixed in the center of the support frame, a plurality of inner sheaths are fixed in the support frame, and the wire core bodies are fixed in the middles of the inner sheaths; an elastic layer is fixed on the outer side surface of the support frame, a bending-resistant layer is fixed on the outer side surface of the elastic layer, and an outer sheath is fixed on the outer side surface of the bending-resistant layer. According to the utility model, the arrangement of the support frame and the bending-resistant layer not only can prevent the position of the wire core body from changing, but also can prevent spontaneous combustion of the wire core body, and in addition, the bending-resistant performance of the whole cable is improved.

The utility model discloses an adjustable anti-spontaneous combustion storage battery bracket, and particularly relates to the field of storage battery brackets, the adjustable anti-spontaneous combustion storage battery bracket comprises a fixing plate, a bracket body and a heat dissipation assembly, the edge of the upper end face of the bracket body is provided with a connecting plate, and the bracket body is installed on the bottom end face of the fixing plate in a limited mode through connecting plate bolts; a heat dissipation assembly is arranged on the side wall of the bracket body, the upper end face of the bracket body is open, telescopic structures are arranged on the upper end face of the fixing plate and the side wall and the bottom end face of the bracket body, and a temperature and humidity sensor is arranged at the bottom of the inner side of the bracket body. According to the bracket for the storage battery, the special structure of the bracket body is utilized, so that the bracket for the storage battery has light weight and high strength, the bracket body can have good heat insulation performance, and the heat dissipation assembly and the telescopic structure are utilized to achieve the effects of dissipating heat of the bracket body and stretching out and drawing back of the bracket body respectively; the bracket body can prevent spontaneous combustion of the storage battery installed inside, and meanwhile the prevention effect is achieved through the conductive wire and the temperature and humidity sensor.

The invention discloses an internal combustion type carbonization system based on material whole-course spiral propulsion, which comprises a carbonization furnace, a feeding auger, an ignition device, a first air blower and a second air blower, the carbonization furnace linearly extends along the left-right direction, and the right end of the carbonization furnace is provided with a carbon discharge port; a drying preheating area, a main carbonization spontaneous combustion area and a burnout carbon discharge area are sequentially formed in the hearth in the advancing direction of materials; through the partition design in the hearth and the whole-course penetrating layout of the feeding auger feeding pipe, materials are turned over, fed and carbonized in the pipe at the same time, and the problems of uneven carbonization and product quality fluctuation caused by static material accumulation or simple pushing of traditional external combustion type equipment are thoroughly solved; meanwhile, due to the internal combustion type design, pyrolysis gas can be spontaneously combusted in the furnace, heat directly acts on a feeding pipe and materials, heat loss caused by external combustion type double wall surface conduction is avoided, the heat utilization rate can be greatly improved, system self-circulation can be achieved under the condition that external continuous energy supply is not needed, and the operation cost is reduced.

A coal blending method and a use thereof, relating to the technical field of thermal power engineering, and solving the problems of low-temperature oxidation, spontaneous combustion and pollutant formation in stored coal. The specific method is as follows: selecting coal M and coal N, and blending same at a specific ratio, wherein the coal M has an oxygen uptake weight gain ΔM>1% and Vdaf>37%, the coal N has an oxygen uptake weight gain ΔM≤1% and Vdaf≤37%, and the weight ratio of the coal M to the coal N is (10-90): (10-90); the oxygen uptake weight gain ΔM=M2-M1, ΔM is the difference between the peak and valley values during the oxygen uptake weight gain stage in a thermogravimetric test, M1 is the valley value of a thermogravimetric curve, M2 is the peak value of the thermogravimetric curve, and Vdaf is the dry ash‑free volatile matter of coal.

The invention discloses a theoretical correction-based fire prevention and extinguishing comprehensive control method for a strip mine with an extremely thick lignite layer, and belongs to the technical field of mine safety. Comprising the following steps: S1, calculating a theoretical minimum coverage thickness based on a gas seepage theory, and correcting in combination with fracture development, material water sensitivity and long-term high-temperature stability factors to obtain an engineering application recommended thickness; s2, constructing an air-ground-fixed integrated three-dimensional monitoring and early warning system, monitoring the deviation of the actual coverage state relative to the recommended thickness, and giving an early warning; s3, on the basis of the monitoring information, implementing treatment for sedimentation fractures, channel blocking of a key partition interface and combustible material management; and S4, starting graded emergency response according to the early warning grade, and executing fire control and extinguishment, regional isolation and post reinforcement. According to the method, the scientific coverage thickness is determined through combination of theoretical calculation and engineering correction, closed-loop management of monitoring, early warning, prevention and control, disposal and review is formed, active prevention and systematic control over the spontaneous combustion risk of the coal seam are achieved, and scientificity, accuracy and economical efficiency are achieved.

The invention relates to a photovoltaic system with an anti-hot-spot effect, which comprises photovoltaic panels arranged in rows and a cleaning device perpendicular to the arrangement direction of the photovoltaic panels and parallel to the photovoltaic panels, and the cleaning device moves along the arrangement direction of the photovoltaic panels through a first moving device; the photovoltaic panels are provided with temperature sensors, the temperature sensors are connected with the control switchboard, if the temperature detected by any temperature sensor is higher than a temperature threshold value, the control switchboard controls the first moving device to move towards the photovoltaic panels with the temperature exceeding the standard, and the cleaning device cleans the surfaces of the passing photovoltaic panels in the moving process. According to the photovoltaic system with the hot spot prevention effect, the temperature condition of each photovoltaic panel is monitored in real time, the photovoltaic panel with the temperature exceeding the standard is found in time and automatically cleaned, meanwhile, the switchboard is controlled to send an early warning signal to the switchboard, the abnormal temperature of the photovoltaic panel is controlled in time, the spontaneous combustion time of the photovoltaic panel is delayed, and the self-ignition efficiency of the photovoltaic panel is improved. And most dirt can be cleaned in time, so that the labor cost is reduced.