1234results about "Chemical analysis using combustion" patented technology

The invention is suitable for the technical field of performance detection, and provides a method for detecting the ablation resistance of a burning-resistant nozzle and an arc contact, and the method comprises the steps: collecting a temperature field matrix, an arc image sequence, an electrical parameter time sequence and a surface displacement curve of an ablation region, and generating a multi-modal data set; based on the data set, extracting spatial features of the ablation core region through a cavity convolution layer and a channel attention mechanism; inputting a preset bidirectional LSTM network, fusing thermal stress data of the COMSOL simulation model to drive gating weight update, and extracting time sequence evolution characteristics; generating a space-time fusion feature vector containing the temperature field gradient, the arc form change rate and the surface roughness evolution feature; inputting the space-time fusion feature vector, the thermal stress distribution data and the material phase change threshold parameter into a constructed ablation prediction model for training; the ablation prediction model after training is completed is optimized; and a performance prediction result is generated in real time by using the optimized ablation prediction model, so that the detection accuracy is effectively improved.

The invention relates to the technical field of combustion equipment state monitoring, in particular to a combustion state monitoring method and system based on vibration and noise fusion analysis, and the method comprises the steps: collecting a combustion signal in real time through a vibration sensor and a broadband noise sensor, extracting a characteristic frequency band through noise reduction and filtering, and obtaining a combustion state; fPGA hardware-level clock synchronization is adopted to realize time alignment of bimodal signals, a vibration-noise joint feature matrix is constructed and multidimensional coupling is carried out, a combustion state feature vector is generated through a mixed deep learning model, a combustion state is determined based on a bimodal confidence weighting decision, and a linkage control instruction is generated during interruption. The system comprises a signal acquisition synchronization unit, a feature fusion and modeling unit, a state decision and instruction generation unit and a safety linkage execution unit, executes a method and activates a standby safety system, solves the problems of asynchronous bimodal data and insufficient monitoring precision, and improves the combustion state monitoring accuracy and safety response efficiency.

The utility model provides a platform for testing spreading performance of fire extinguishing foam. The platform comprises a test box body with an upper opening, a heating assembly and a test assembly, the test box body comprises a visual loading container and a hollow support located at the bottom of the visual loading container, and the visual loading container is used for loading target combustible liquid; the heating assembly comprises a heating plate, the heating plate is arranged between the bottom of the visible loading container and the hollow support, and the heating plate is used for heating the target combustible liquid in the visible loading container; a foam spray head is further arranged above the visible loading container; and the test assembly is used for recording corresponding data in the foam spreading performance test. The utility model aims to provide a spreadability test platform for different types of fuel oil surfaces and fire extinguishing foam spreadability tests for high-temperature fuel oil surfaces and different types of high-temperature fuel oil combustion surfaces, so as to improve the authenticity of simulating petrochemical fire scenes.

The utility model discloses a foam spreading and fire extinguishing performance testing device based on a submerged image recognition technology, which comprises an oil tray, an image acquisition device, a magnetic fluorescent sticker and an image processing device, the image processing device is electrically connected with the image acquisition device through a network cable, and the oil tray comprises an oil tray main body, an anti-burning tank and supporting legs, the image acquisition equipment comprises a camera I arranged at the top of the oil pan main body and submerged camera equipment arranged on the inner side of the oil pan main body, the submerged camera equipment comprises a submerged camera II, a submerged camera III and a submerged camera IV, the submerged camera III is arranged in the center of the oil pan main body, and the submerged camera IV is arranged in the center of the oil pan main body; the magnetic fluorescent stickers are arranged at the bottoms of the two side tray walls of the oil tray body. Dynamic changes such as a foam flowing track, a foam fire extinguishing behavior and an ignited fuel area are captured and collected from an upper view angle and a lower view angle of a foam layer, interference of flames on observation or collection of the foam coverage area is avoided, the foam spreading speed in the fire extinguishing process is accurately calculated, and the 25% anti-burning time of a foam fire extinguishing agent is judged.

The invention provides a portable fire blast risk dynamic identification and danger tracing method and terminal, and the method comprises the steps: collecting positioning data in real time through a GNSS positioning module; a high-speed analog-to-digital conversion chip ADC is used for carrying out high-frequency and synchronous processing on the gas concentration collected in real time; collecting field environment parameters in real time; performing dynamic threshold intelligent judgment to obtain a leakage judgment result, and executing a grading early warning mechanism; recording an inspection track in real time, and carrying out space gas concentration gradient analysis to obtain a gas concentration gradient; calculating a built-in space distance; judging the leakage direction according to the gas concentration gradient data, and intelligently tracing the leakage source according to the leakage judgment result; and uploading the security data to the cloud. According to the invention, the limitation of static and single-threshold alarm of an instrument is solved, and the technical problems of difficulty in spatial continuous sensing and automatic tracing positioning of gas leakage abnormity in a complex inspection environment with dynamic changes of multi-component combustible gas and environmental parameters are solved.

The invention relates to the technical field of automobile manufacturing, in particular to a flame-retardant coating detection device and a flame-retardant coating detection method. The flame-retardant coating detection device comprises a baffle plate, a supporting plate, a cover plate and a supporting plate which are enclosed to form a closed test cavity. The baffle is provided with a first mounting hole for fixing a fire source, the supporting plate is provided with a corresponding second mounting hole for fixing a temperature detection piece, the cover plate is provided with an insertion hole for mounting a sample, and the supporting plate is provided with a smoke suction assembly. The device is simple in structure and convenient to operate, a fire source and a temperature measuring point can be effectively fixed, the testing efficiency and accuracy are improved, testing is conducted in a closed environment, the smoke suction function is integrated, safe and environment-friendly harmful smoke is guaranteed, the safety and health of operators are comprehensively guaranteed, and environmental pollution is avoided.

The application discloses a shock tube experimental device which can realize switching of a high-pressure ignition experimental system and a single-pulse cracking experimental system; when the shock tube experimental device is used as the high-pressure ignition experimental system, the device comprises a shock tube body which comprises a high-pressure section, an intermediate section and a low-pressure section, and further comprises a two-way section, wherein the two-way section is connected with the intermediate section and the low-pressure section through flanges; a pre-gas distribution system which comprises an oxidant gas cylinder, a diluent gas cylinder and a gas mixing cylinder; a vacuum and pressure supply system which comprises a vacuum pump, a gas extraction pump and a driving gas cylinder, wherein the vacuum pump and the gas extraction pump are used for extracting the shock tube body into a vacuum environment; and the driving gas cylinder is connected with the high-pressure section and the intermediate section through a pipeline; when the shock tube experimental device is used as the single-pulse cracking experimental system, a three-way section and a gas exhaust tank are used to replace the two-way section on the basis of the above structure, wherein the three-way section is connected with the intermediate section, the low-pressure section and the gas exhaust tank through flanges.

The invention belongs to the technical field of coal mine fire prevention and extinguishing, and particularly provides a coal mine goaf fire simulation experiment device and method. Comprising an experiment table groove body, a working face channel, an air inlet way, an air return way, a ventilation system, a goaf groove body, a water bath heating and heat preservation system, a goaf temperature simulation system, a distributed temperature acquisition system, a goaf gas environment simulation system and a gas acquisition system. According to the invention, the inclination pitching angle, the coal rock porosity, the goaf ignition position, the internal gas components and the like of the goaf can be simulated according to the actual conditions of different working surfaces of each coal mine, and the evolutionary process of the spontaneous ignition accident of the goaf is realized. According to experimental data, development and change states of internal temperature, gas components and the like of the goaf of each coal mine can be determined, key fire prevention and control areas of the goaf in each period of coal mining are found out, early warning is performed in advance, and life and property safety of underground personnel is guaranteed.

The invention discloses a visual measurement device and method for the combustion process of an electronic control solid propellant. The measurement device comprises a grain sample, a power source, a control system, a high-speed camera, a constant-volume combustion bomb, a temperature controller and a gas supply system. The constant-volume combustion bomb comprises a heating element, a combustion chamber and an integrated seat, and the high-speed camera directly faces the visual window; the integrated seat comprises an adapter and an electrode assembly, the electrode assembly comprises an electrode column, an electrode clamping plate and an electrode slice, the electrode slice is attached to the side face of a grain sample, the grain sample is located in an electrode slice excitation area and comprises a medicine core and an insulating layer, and the lower end of the medicine core is an initial combustion section; according to the measuring device, the image technology and the controllable environment cavity are fused, the burning rate of the solid propellant under various working conditions is collected, the burning rate and related burning parameters can be accurately measured without interference under various set working conditions through a grain sample special for non-contact measurement and an exciting electrode assembly, and the measuring method can achieve synchronous triggering collection of multiple physical quantities, so that the measuring efficiency is improved. And the multi-physical coupling combustion characteristics of the propellant can be conveniently analyzed.

The invention discloses an environment-friendly high-weather-resistance flame-retardant ABS plastic modification testing device, and relates to the technical field of flame-retardant ABS plastic modification testing, the environment-friendly high-weather-resistance flame-retardant ABS plastic modification testing device comprises a testing table and a plurality of cotton pads, one side of the testing table is fixedly connected with an igniter which is used for igniting methane gas and spraying flames to the lower end of a testing sample from a spraying opening in an inclined 45-degree mode, and the cotton pads are arranged on the testing table. A base plate is fixedly connected to one side of the test table, a methane bottle containing methane gas is fixedly connected to one side of the base plate, the output end of the methane bottle is connected with an input end pipeline of an igniter, and a push plate and a sliding plate are driven to move through stretching and retracting of a hydraulic cylinder, so that before the push plate pushes a cotton cushion, the cotton cushion is pushed by the sliding plate; when the cotton cushions are pushed by the pushing plate, the multiple cotton cushions above the pushed cotton cushion are supported, so that the phenomena that when the cotton cushions are pushed by the pushing plate, the multiple cotton cushions above apply pressure to the lowest cotton cushion, and the lowest cotton cushion twists and deforms in the pushing process are effectively prevented, and the effect of stably conveying the cotton cushions is achieved.

The utility model provides a droplet evaporation and combustion experimental device for observing flame. The droplet evaporation and combustion experimental device comprises a support frame; the liquid drop generating and conveying system is arranged on the experiment platform and is used for generating and conveying liquid drops; the heating system is arranged on the supporting frame and located above the liquid drop generating and conveying system, and the liquid drop generating and conveying system can convey the liquid drops to the heating system; and the shooting and data acquisition system is positioned on one side of the heating system and is used for shooting the state of the liquid drops in the heating system. According to the utility model, droplet evaporation and combustion experiments can be completed, droplet shape and flame form images can be acquired at a high speed, droplet evaporation and combustion rules can be further obtained, and deeper understanding of atomization combustion is facilitated.

The invention discloses a pulverized coal furnace coal quality monitoring method, device and equipment and a storage medium, which are applied to the field of coal quality monitoring and are used for determining process parameters related to the coal quality of a pulverized coal furnace. Determining furnace uniform temperature based on the furnace outlet smoke temperature, and determining a first numerical item based on the furnace uniform temperature and the boiler evaporation capacity; determining the total desuperheating water amount based on the desuperheating water amount; determining a second numerical item based on the total desuperheating water amount, the coal mill current and the boiler evaporation amount; determining a smoke amount coefficient based on the smoke exhaust oxygen amount, determining smoke exhaust uniform temperature based on the smoke exhaust temperature and the current of the coal mill, and determining a third numerical item based on the smoke amount coefficient, the smoke exhaust uniform temperature and the inlet air temperature of the air feeder; and constructing a coal quality detection model based on the first numerical item, the second numerical item and the third numerical item, and determining a coal quality detection result based on the monitoring data and the coal quality detection model. According to the boiler combustion principle, monitoring data of coal quality related process parameters are collected for multi-parameter correlation analysis, and real-time monitoring of the coal quality of the pulverized coal furnace is rapidly and accurately achieved at low cost.

The invention discloses a constant-volume optical test platform suitable for ammonia-hydrogen stratified combustion and a test method. The test platform comprises an experiment bench; the constant-volume combustion bomb is mounted on the experiment bench, and the interior of the constant-volume combustion bomb is divided into a combustion chamber and two heating chambers by two partition pieces; the ejector mounting seat is arranged at the top of the combustion chamber; the hydrogen ejector is mounted on the ejector mounting seat and is arranged towards the center of the combustion chamber; the two spark plugs are respectively arranged on the two separators and are arranged towards the center of the combustion chamber; the ammonia gas-air channel is arranged on the ejector mounting seat; the two first windows are symmetrically arranged on the two side faces, adjacent to the partition piece, of the combustion chamber. The second window is arranged on the bottom surface of the combustion chamber; the optical system is installed on the experiment bench, and the optical system and the constant volume combustion bomb form an optical path position required by a schlieren method and a direct shooting method; and the control system is electrically connected with the hydrogen ejector, the spark plug and the optical system.

The invention relates to the technical field of fire reason investigation, and particularly discloses a heat radiation test device with an adjustable test rack, which comprises a heat radiation rack and a test rack, a radiation source is mounted on the heat radiation frame; the test rack is in a portal shape, the left end and the right end of the test rack are sleeved with sliding supports with the adjustable height respectively, and locking assemblies are installed on the sliding supports. The device further comprises a horizontally-arranged rotating rod, the two ends of the rotating rod are connected to the two rotating rods correspondingly, and a rotating assembly is installed on the rotating rod and rotates in the circumferential direction of the rotating rod. A fixing frame is installed on the rotating assembly and used for fixing a sample. The effect of adjusting the overall height of the fixing frame is achieved by adjusting the height of the sliding support, the angle of the fixing frame is adjusted through the upper rotating assembly, a sample can face a radiation source at different angles to conduct a heat radiation test, and an operator can more accurately simulate the state of the sample to test data according to post-disaster data.

The invention relates to the technical field of boiler pulverized coal monitoring, in particular to a boiler pulverized coal monitoring method which comprises the following steps: determining whether a separation mode of a pulverized coal separator is qualified or not according to a comparison result of a particle size distribution characterization value of pulverized coal in a pulverized coal pipe at an outlet of a coal mill and a preset distribution characterization value; under the condition that the separation mode of the pulverized coal separator is determined to be unqualified, the angle of a guide blade of the pulverized coal separator is adjusted according to the radial flow velocity difference value of the pulverized coal pipe at the outlet of the coal mill; whether airflow mixing of the thick pulverized coal phase and the thin pulverized coal phase is qualified or not is determined based on the ignition interval; under the condition that airflow mixing is determined to be unqualified, a plurality of air speed adjusting coefficients are set according to the uniformity characterization value of temperature gradient distribution of the hearth to adjust the air speed of secondary air, and the air speed adjusting coefficients are optimized according to the flame shape characterization value in the hearth; and optimizing the preset distribution characterization value according to the fluctuation intensity of the combustion efficiency curve. The combustion efficiency of the pulverized coal is guaranteed while generation of nitric oxide is inhibited.

The utility model discloses an infrared carbon and sulfur analysis device for sulfur concentrate inspection. The infrared carbon and sulfur analysis device comprises a case as well as a combustion assembly, a cooling and dehumidifying assembly, a carbon infrared detection tank and a sulfur infrared detection tank which are connected in sequence, the cooling and dehumidifying assembly is composed of a heat exchange tank A, a heat exchange tank B, a dehumidifying disc, a fan, an air heater and a stirring mechanism. The heat exchange tank A and the heat exchange tank B are internally provided with a spiral pipe A and a spiral pipe B respectively, the spiral pipes are connected through a connecting pipe to form a closed passage, the connecting pipe is provided with a pressure pump, and the closed passage is filled with a heat exchange medium. And the dehumidification disc is filled with water absorption filler. Gas components generated by fully combusting the sulfur concentrate by the combustion assembly sequentially pass through the heat exchange tank A, the dehumidification disc, the carbon infrared detection tank and the sulfur infrared detection tank and then are exhausted, and external air extracted by the fan sequentially passes through the heat exchange tank B, the air heater and the dehumidification disc and then is exhausted. The sulfur concentrate detection device is reasonable in design structure, simple and convenient to operate, suitable for rapid and accurate detection of sulfur concentrate, and high in application value.

The invention discloses an infrared and ultraviolet flame detector with multiple safety redundancy and an anti-explosion control method, and relates to the technical field of flame detection, and the anti-explosion control method comprises the steps: S1, obtaining the multi-source fire data of a target object through a signal obtaining module; s2, analyzing the multi-source fire data through a dynamic coupling adjustment module; s3, performing time domain association verification on the first monitoring data through a time domain continuity verification module, and generating second monitoring data; and S4, the grading execution module sends an alarm signal according to the second monitoring data and adopts grading execution processing. Through ultraviolet polarization degree and dielectric constant dual-threshold triggering, interference of the metal reflective layer is stripped, so that the smoldering detection rate of a covered scene is increased from less than or equal to 60% to more than or equal to 95%; and moreover, the smoldering authenticity is subjected to cross validation through the bidirectional verification module, so that the problem of missing report of a traditional flame detector caused by a covering effect of'reflective interference 'on'smoldering monitoring' is avoided.

The invention provides a method for determining the spontaneous combustion evolution process of end slope coal of a strip mine, and belongs to the field of geotechnical engineering geological disaster prevention and control and the field of mine safety and environmental protection. Updating the porosity, the permeability and the range of the combustion space area in the pre-established three-dimensional geologic model by adopting the three-dimensional distribution of the porosity of the bending subsidence zone, the permeability of the fissure zone, the permeability of the caving zone and the porosity of the caving zone in the combustion space area; performing coal fire evolution simulation again according to the updated pre-established three-dimensional geologic model to obtain a coal fire development range, an updated real-time temperature field range and a gas concentration field; and if the combustion cannot be continued, outputting a final coal fire development range and an updated real-time temperature field range. According to the method, the efficiency and accuracy of open-pit mine end slope coal fire treatment are effectively improved.

The invention discloses handheld steel fireproof door fireproof performance in-situ nondestructive testing equipment and a use method, and belongs to the technical field of fireproof door fireproof performance determination. In order to solve the problems that an existing method lacks an effective in-situ nondestructive testing means and the actual fire resistance of a fireproof door in use cannot be accurately judged, handheld in-situ nondestructive testing equipment for the fire resistance of the steel fireproof door is designed, during testing, electric suction cups on the two sides of the equipment are adsorbed to the fireproof door, and a laser sensor rapidly measures the thickness of the fireproof door; the ultrasonic eddy-current sensor is used for measuring fireproof door steel plate thickness; the X-ray sensor is used for measuring the compactness of the fireproof door filling material by using the X-ray propagation time; and comparing the measured data with a qualified fireproof door to obtain the fireproof performance of the measured fireproof door. Compared with the original fireproof door sampling detection equipment and method, the equipment and method can realize portable in-situ nondestructive detection, quickly judge the performance of the fireproof door, prevent inferior products from entering the market and protect the property and life safety of people.

The invention discloses a lithium ion battery thermal runaway gas-liquid-solid multiphase jet simulation device and method, and belongs to the technical field of battery safety testing. The device comprises mixed gas, high-temperature steam and dust sampling pipelines which are arranged in parallel and converged to a nozzle, a closed reaction container provided with an environment regulation and control system, a system for ignition and multi-parameter monitoring and a master control system. According to the method, multi-phase medium parameters and a container environment are set through general control, and the whole process of environment creation, multi-phase jet injection, ignition and data acquisition is automatically completed. According to the invention, the defects of high cost, high risk, poor repeatability and incapability of independently regulating and controlling multiphase components caused by dependence on a real battery in the prior art are overcome, the complex multiphase jet combustion behavior can be safely, accurately and repeatedly simulated, and a key experimental platform is provided for quantitative research on thermal runaway flame characteristics and a prevention and control technology.

The invention discloses an experimental device and method for simulating the combustion rate of pulverized coal injected by a blast furnace, and belongs to the technical field of blast furnace ironmaking. The experimental device comprises a hot air generation unit, a pulverized coal injection unit, a fuel gas injection unit, a pulverized coal hot air combustion unit, a tail gas treatment unit and a data processing unit; simulated injection of combustion-supporting gas, carrier gas and fuel gas in the blast furnace injection pulverized coal combustion process can be achieved, simulation of the blast furnace injection pulverized coal combustion process is accurately achieved, and then the pulverized coal combustion rates under different combustion conditions are accurately obtained. According to the device and the method, process condition simulation under different blast furnace combustion operation environments can be met, the combustion behavior of blast furnace injection pulverized coal at the front end of a tuyere is accurately simulated, and the combustion rate of the pulverized coal under different combustion conditions is accurately measured; and a basis is provided for analyzing the influence of different process control parameters on the blast furnace pulverized coal injection combustion condition, and optimization and application of the blast furnace pulverized coal injection technology are promoted.

The invention relates to a combustion experiment machine, and relates to the technical field of material performance detection, and the combustion experiment machine comprises a combustion chamber used for accommodating a to-be-detected material; a heating system associated with the combustion chamber; the multi-mode sensing system is used for monitoring one or more performance parameters of the to-be-tested material in the combustion process; the data processing unit is connected with the heating system and the multi-mode sensing system; the heating system is configured to apply a composite heat flow comprising a reference heat flow and a periodically changing disturbance heat flow to the material to be tested. According to the method, traditional static measurement is converted into active dynamic diagnosis, parameters such as dynamic mechanical properties, chemical reaction kinetics and mass transfer characteristics in the combustion process can be quantitatively obtained, thermal-mechanical-chemical multi-physical field concurrent events are effectively decoupled by comparing phase information of multi-modal response, and the combustion performance of the combustion system is improved. And a brand new technical means is provided for deeply revealing a material combustion mechanism.

The invention discloses a system and a method for testing the flame retardance of an oil storage pit based on multi-source fusion. The system comprises a control execution module, a data module, a decision module and an evaluation module, the control execution module is used for simulating an oil storage pit fire scene; the data module is used for collecting multi-modal physical parameters generated in a simulated fire scene in real time; the decision-making module is used for preprocessing the multi-modal physical parameters, performing space-time alignment and feature fusion analysis on the preprocessed multi-modal physical parameters to obtain fused unified feature representation, generating a comprehensive combustion situation map, generating a self-adaptive control instruction according to the comprehensive combustion situation map, and sending the self-adaptive control instruction to the control execution module; adjusting the fire scene of the oil storage pit; and the evaluation module is used for receiving the historical data and the fused unified feature representation, and outputting a quantitative evaluation and prediction report of the flame retardant property of the oil storage pit by constructing a flame retardant property prediction model. According to the invention, intelligent testing of multi-source data of flame retardance of the oil storage pit is realized.

The invention relates to the technical field of protective clothing testing, and discloses a protective clothing combustion testing device based on an intelligent sensor, which comprises a control console, a testing cabinet is arranged on the control console, a simulation mechanism for simulating real motion is arranged on the inner wall of the testing cabinet, and an exhaust mechanism for ventilation is arranged on the inner wall of the testing cabinet. According to the device, in the rotating process of the fire protection clothing, it can be ensured that heat flow of subsequent flame testing is uniform, testing and detection are free of dead corners, the real wearing state is simulated, the flame testing quality of the device on the fire protection clothing is improved, the testing combustion precision of the device on the fire protection clothing is improved, and the testing efficiency is improved. And meanwhile, a temperature sensor on the surface of the human body model can test the internal temperature of the fire protection clothing, all-directional combustion test detection of the device on the fire protection clothing can be improved through rotary movement of a flame gun, and the combustion test effect of the device is improved.

The invention relates to the field of high polymer material processing, in particular to a preparation optimization method of special antibacterial flame-retardant master batch for polypropylene, which comprises the following steps: acquiring a polypropylene matrix set, an antibacterial agent set, a flame retardant set, a compatilizer set, an antibacterial range and a flame-retardant range, acquiring a standard test piece by using a test master batch set, performing an external force resistance test on the standard test piece, and obtaining the antibacterial flame-retardant master batch for the polypropylene. Performing an antibacterial effect test on a qualified test piece to obtain an antibacterial index and an updated test piece, performing a flame retardant capability test on the updated test piece to obtain a flame retardant index, and marking a test proportion group corresponding to a maximum performance value as a successful proportion group; and performing supplementary preparation operation on the polypropylene matrix set, the antibacterial agent set, the flame retardant set and the compatilizer set based on the success ratio group and the external force resistance index corresponding to the success ratio group to obtain a target master batch set, thereby completing preparation optimization of the antibacterial flame-retardant master batch. The overall performance of the antibacterial flame-retardant master batch can be improved, and the application effect of the antibacterial flame-retardant master batch is improved.

The utility model discloses a refractory material production performance testing device which comprises a box body, a box door hinged to the front side of the box body through a hinge, supporting frames fixedly connected to the front side and the rear side of the bottom of the box body, an exhaust pipe arranged on the right side of the box body, a fan fixedly connected to the left side of the box body, and a detection mechanism arranged in the box body. And a fixing mechanism is arranged in the box body. According to the utility model, the detection mechanism and the fixing mechanism are used, so that the cylindrical refractory material can be subjected to extrusion and high-temperature testing, and the problem that when the refractory material is tested, various different testing devices, such as a high-temperature testing device, a pressure-resistant testing device and the like, need to be used for comprehensively evaluating the performance of the refractory material is solved; therefore, the refractory material testing cost is increased, the refractory material testing time is prolonged, the refractory material testing efficiency is reduced, and the device has the advantage of being convenient to detect.

The invention discloses a megawatt pressurized bubbling fluidized bed oxygen-enriched combustion test platform and a combustion method. The platform comprises a feeding system, a pressure swing adsorption oxygen production and gas inlet system, a deslagging system, an oxygen-enriched combustion reaction system and a flue gas and fly ash sampling treatment system. The feeding system adopts a spiral and star-shaped double-path independent pressure feeding unit, and is provided with a multi-stage stock bin, a drying device and a pipeline cooling structure, so that pressurized continuous feeding is realized, and tempering is prevented; the pressure swing adsorption oxygen generation and gas inlet system generates oxygen-enriched gas through a PSA technology, and the oxygen-enriched gas is mixed with CO2 to form a graded oxygen-enriched atmosphere; according to the oxygen-enriched combustion reaction system, accurate temperature control is achieved through an air distribution plate, a reducer pipe and a partition heat exchange device, and generation of NOx is restrained; the problems of unstable fuel supply, unreliable deslagging, low combustion efficiency, difficulty in CO2 enrichment and the like under the high-pressure oxygen-enriched combustion condition in the prior art can be effectively solved.

The utility model discloses an experimental device for studying double-fire-source combustion characteristics of a longitudinal ventilation downwards-inclined tunnel. The experimental device can conveniently replace a site, change ventilation conditions and ensure the stability when the gradient of the simulated tunnel is rapidly adjusted. According to the technical scheme, the device comprises a supporting plane steel frame, a detection unit, an image acquisition unit and an air supply device, a longitudinal airflow device and a simulation tunnel are arranged above the supporting plane steel frame, the detection unit is arranged in the simulation tunnel, the image acquisition unit is arranged on one side of the simulation tunnel, and the air supply device is connected with two combustors at the bottom of the simulation tunnel through pipelines; a supporting foot stool and an inclination angle fixing frame are arranged below the supporting plane steel frame, the supporting foot stool is hinged to the middle of the supporting plane steel frame through a first pin shaft, a protractor is arranged at the top of one side of the supporting foot stool, and the top of the inclination angle fixing frame is hinged to the end of the supporting plane steel frame through a second pin shaft. And a hydraulic jack is arranged below the second pin shaft.

The application relates to the technical field of fire-fighting cable detection, in particular to a fire-fighting cable detection device which comprises a box body, stretching cavities, first guide rods, a burner and a clamping mechanism. Stretching cavities are arranged on the left and right sides of the inner cavity of the box body. The number of the first guide rods is eight, and the eight first guide rods are arranged at the four corners of the inner cavities of the two stretching cavities. The burner is arranged at the bottom end of the inner cavity of the box body. The clamping mechanism is slidably sleeved on the outer wall of the first guide rod. The device can not only detect the fire resistance and flame retardance, but also simulate the damage of the object impact on the cable outer skin and internal structure in the fire scene. Meanwhile, the cable tension change in the fire scene is simulated and detected, the tension abnormality caused by factors such as thermal expansion and cold shrinkage and structure deformation is found in time, and problems such as internal conductor fracture, poor contact and outer skin rupture are prevented, so that the stable power transmission of the fire-fighting cable in the emergency such as fire is effectively ensured, and the normal operation of the fire-fighting equipment is ensured.

The invention discloses a quantitative evaluation method for the apparent combustion quality of a manual cigar, and the method comprises the steps: obtaining the combustion characteristic data of the cigar in a smoking mode through collecting a cigarette image sequence in the smoking process of the cigar; comprising a gray value, a gray column pixel variance, a gray column pixel variation coefficient, a gray column deviation degree, combustion uniformity and a lowest carbon thread spreading rate, then obtaining a corresponding score according to the apparent combustion quality grade in the cigar smoking process, and carrying out regression analysis on the score and various combustion characteristic data. And obtaining a comprehensive evaluation index of the combustion characteristics of the cigar. The method adopted by the invention is objective, scientific and accurate, and can quantitatively evaluate the apparent combustion quality of the cigar.