68 results about "Flame height" patented technology

The invention relates to the technical field of crude oil storage tank safety testing, and particularly discloses a crude oil storage tank combustion boiling overflow simulation testing device which comprises an experiment table, an oil tray, a sampling assembly and a measuring assembly, the oil tray is connected to the experiment table, and the measuring assembly comprises a plurality of heat flow meters, a thermocouple, a camera and an infrared camera. The heat flow meters are arranged at the bottom, in the middle and outside the oil pan respectively and used for measuring and obtaining internal and external heat conduction intensity data of the oil pan when crude oil burns. The thermocouple is connected in the oil pan through the mounting frame and used for measuring and obtaining data of the temperature of the center line of the oil pan, the formation position of a hot area and the temperature in the hot area, the camera is used for obtaining image data of the flame height, the splashing area contour and the combustion area contour which change along with time, and the infrared camera is used for obtaining image data of the thermal radiation area contour; the sampling assembly is connected to one side of the oil pan and used for sampling and detecting non-azeotropic oil in a hot area in the oil pan. The device can provide more comprehensive data support for disaster relief.

The utility model discloses a fire grate, a combustor and a gas water heater, the fire grate comprises a fire grate body, a combustion cover and a flow equalizing plate; the fire grate body is provided with a gas channel and a gas outlet communicated with the gas channel; the combustion cover covers the air outlet and is provided with a plurality of fire holes which are distributed at intervals in the length direction; the flow equalizing plate is arranged in the gas channel, is opposite to the combustion cover and is arranged at an interval with the combustion cover, a plurality of flow equalizing holes are formed in the flow equalizing plate at intervals in the length direction, and the flow equalizing plate extends to the other end of the fire grate body from one end of the fire grate body in the length direction; according to the technical scheme, air inlet resistance is increased through secondary pressure equalizing and flow dividing, so that air outlet of the fire holes is uniform, the height of flames at the head of the fire grate is reduced to be the same as that of flames at the tail, the uniformity of the overall height of the fire grate combustion flames is improved, the combustion space is effectively shortened, heat loss is reduced, and CO emission is reduced.

The invention relates to the technical field of jet flow flame disaster-causing parameter prediction, and discloses a jet flow diffusion flame size and radiation characteristic prediction method and system based on a machine learning method. The method comprises the following steps: constructing a flame size empirical model based on experimental data characteristics; constructing a machine learning model to predict flame height, width and lifting height, and combining the empirical model as a loss function with the empirical model; mass flow is determined according to the gas parameters, and a flame dwell time and radiation fraction calculation model is established in combination with a flame width prediction model; and establishing a flame total radiation power calculation model and a radiation source weighted distribution model, and solving the radiation heat flux by combining a flame height and lifting height prediction model. The prediction method provided by the invention can be used for predicting the sizes and radiation characteristics of jet diffusion flames with different scales under various working conditions, and has the characteristics of high prediction efficiency, high prediction precision, wide application range and the like.

The invention relates to the technical field of continuous casting, in particular to a method for monitoring and judging a flowing mode of molten steel in a slab crystallizer, which comprises the following steps of: acquiring a time sequence image of the liquid level of the crystallizer, and dividing the liquid level into a plurality of monitoring sub-areas by taking a water gap as a center; based on the time sequence image, flame characteristic parameters of all the monitoring sub-areas are extracted, and the flame characteristic parameters comprise the flame coverage area proportion and the flame height; based on the flame characteristic parameters, determining distribution characteristics of a flame-free area of the liquid level; and based on the liquid level flame-free area distribution characteristics and a plurality of preset flame height threshold values, the molten steel flowing mode is determined through multi-stage logic judgment. The monitoring equipment is far away from a high-temperature area, low in complexity, long in service life, free of continuous input of consumables and low in cost, the liquid level of the crystallizer cannot be disturbed in the monitoring process, nondestructive monitoring is achieved, and the flowing state on the liquid level of the crystallizer can be continuously monitored for a long time.

The utility model discloses a fire grate and gas equipment, and relates to the technical field of gas equipment. Wherein the fire grate comprises a shell, a combustion cover and a rectifying plate, and an airflow channel is formed in the shell; the combustion cover is arranged at the top of the shell and is provided with a plurality of fire holes communicated with the airflow channel; the rectifying plates are arranged in the airflow channel and are arranged below the combustion cover at intervals; air passing holes are formed in the rectifying plate; the distance h between the rectifying plate and the plate body, provided with the fire holes, of the combustion cover is larger than or equal to 1 mm. According to the technical scheme, the overall flame height can be reduced, flame lifting and leaving are avoided, combustion is more sufficient, and emission of nitric oxide is reduced.

An automated method of measuring, monitoring and recording candle burn performance using vision system automation. The method includes timed candle flame height measurement consisting of a camera using image bursts. Recording in a database with a unique identifier barcode for each candle and corresponding wick to identify and record candle data with a date and time stamp. Audio-Visual alerts for flame callouts less than ½ inch or greater than 2 inches and 3″. Documenting any extinguished candles / wicks (mid and / or end of life). Candle Temperature Measurement is performed every 2 hours (depending on burn type and cycle), which includes wax melt pool temperature (with callouts for temperatures reaching and / or exceeding 250 deg C.) and container side wall temperature. Candle Picture is performed at the mid and end of life, and the sustainer position is tracked to determine wick migration.

The application discloses a fire plume characteristic parameter calculation method, an evolution experiment device and a use method, and relates to the technical field of fire safety, and aims to provide a fire plume characteristic parameter calculation method, an evolution experiment device and a use method. The fire plume characteristic parameter calculation method comprises the following steps: determining influence factors of fire characteristics under a vertical shaft structure, establishing a relationship formula of fire characteristics and the influence factors, and the fire characteristics comprise an average fire plume height and a temperature rise in the vertical direction inside the vertical shaft; simulation experiments are carried out through a fire plume evolution experiment device, simulation results under different working conditions are obtained, a scatter diagram is drawn, and the influence of the influence factors on the fire characteristics is determined; basic physical quantities of the influence factors are determined, the relationship formula of the fire characteristics and the influence factors is converted into a dimensionless relationship formula; nonlinear fitting is carried out on the results of the scatter diagram, and a fire plume representation model is established based on the dimensionless relationship formula; in this way, the average fire plume height under the vertical shaft structure and the temperature rise in the vertical direction inside the vertical shaft are calculated, effective guidance can be provided for fire rescue, and the disaster relief efficiency is improved.

The application relates to a candle pop. The candle pop comprises a shell, a wax base, a wick and a driving mechanism. The shell is provided with a containing cavity. The wax base is arranged in the containing cavity. The wick is arranged in the wax base and is used for burning the wax base. The wick has a burning section exposed outside the wax base and used for burning. The driving mechanism is arranged on the shell and drives the wax base to slide in the containing cavity, so that the distance between the free end of the burning section and the open mouth of the containing cavity and the wax base is within a set range. Thus, the position of the free end of the burning section in the containing cavity is basically kept constant, so that the position of the flame in the containing cavity is basically kept constant, that is, the height of the flame is basically kept unchanged. In the case that the height of the flame is basically kept unchanged, the user can observe the flame through a basically constant visual angle without frequently changing the visual angle to adapt to the flame with a great change in height. Thus, the flame generated by the burning section has a reasonable observation visual angle, so that the user experience is improved.

The invention relates to the technical field of art burning, and discloses an art burning control method and system, a storage medium and electronic equipment, and the method comprises the steps: responding to a target time sequence formula selected by a user, and according to the start-stop time sequence and the working time length of each type of target art burning device contained in the target time sequence formula, controlling the target art burning device according to the start-stop time sequence and the working time length of each type of target art burning device; each type of target art burning device is controlled to carry out ignition or flameout operation; inputting current meteorological parameters collected in real time into the optimized RBF neural network to obtain predicted PID control parameters; and based on the predicted PID control parameters, adjusting the opening degree of an electric adjusting valve of each type of target art burning device so as to enable the flame height and the burning posture to adapt to environmental changes. The problems of manual control, fixed time sequence and difficulty in dynamic adjustment of existing art fire can be solved, dynamic adjustment of the time sequence of art fire and self-adaption of flame to environment change are realized, and the flexibility and effect of art fire control are improved.

Even if the fuel pressure to a torch for igniting an air-fuel mixture in a gas turbine engine is set to an ideal value, the actual fuel pressure supplied to the torch may differ due to modifications, drift, changes in ambient temperature or pressure, fuel composition, and / or the like. This may result in failure of the gas turbine engine to ignite. Accordingly, embodiments introduce a torch active pressure control (TAPC) system (260) into the flow path of fuel to the torch (400). The TAPC system (260) is controlled to modulate fuel pressure of the fuel supplied to the torch (400), according to a modulation profile. The modulation profile may traverse a range of fuel pressures in sinusoidal, V-shaped, stepped, or other-shaped cycle(s), to increase the probability that the ideal fuel pressure, and therefore, flame height, is achieved, thereby increasing the likelihood of a successful lightoff.

The invention discloses a flame boiler combustion control system and method, and belongs to the field of combustion control systems.The system comprises a coal quality multi-dimensional evaluation module, a coal quality control module and a coal quality control module, the monitoring information comprises flame height, flame color spectrum distribution, smoke generation amount, smoke component concentration and combustion voiceprint characteristics; a quality score generation module connected to the coal quality multi-dimensional evaluation module and configured to generate a coal quality score S through a weighted fusion algorithm based on the monitoring information; and the control strategy decision engine comprises a case matching unit, a historical case database, a feeding management module and a combustion controller and is configured to execute the following operations. According to the system and the method, the abnormity of coal combustion can be found in time when the boiler runs, adaptive adjustment can be made according to the abnormal condition, and finally self-adaptive control, running zero interruption, efficiency optimization and whole-process responsibility tracing of the coal-fired boiler are achieved.

The application discloses a flame direction determination method, a flame direction determination device and electronic equipment, and relates to the field of forest fire prevention. The flame direction determination method comprises the following steps: acquiring a current wind speed when a combustible is burning and attribute information of the combustible, wherein the attribute information comprises a combustible type and a combustible size; calculating a current heat release rate of the combustible according to the combustible type and the combustible size, and acquiring a flame height corresponding to the current heat release rate under a windless condition; determining a critical wind speed of the combustible based on the current heat release rate and the flame height; and calculating an actual flame height and a flame deflection angle of the combustible corresponding to the current wind speed based on the critical wind speed. The application can determine the direction of flame burning according to the current wind speed, and provides data support for forest fire prevention.

The application discloses a material high-temperature hydrogen permeation simulation experiment device and experiment method based on a counter diffusion flame burner. Fuel enters a fuel cavity with horizontal initial momentum, is discharged after the initial momentum is weakened, and oxidant is vertically discharged with an initial speed and is distributed above the fuel gas flow, so that the fuel and the oxidant form a speed difference, the oxidant can form an entrainment effect on the fuel, the mixing of the oxidant and the fuel is promoted, the stability and heat release efficiency of the counter diffusion flame are improved, sufficient combustion and uniformity of flame temperature distribution are ensured, efficient and uniform mixing can be realized without a swirl generator, the structure of the counter diffusion flame burner is simplified, the equivalence ratio of the oxidant and the fuel can be adjusted by a data acquisition and control system to adjust the combustion state of the flame, so that the flame height, the temperature and the active free radical concentration are accurately controlled, the application scene of a sample is effectively simulated, various flame environments can be provided for performance experiments of the sample, and the experimental reliability is improved.

This invention reveals a diagnostic and blockage detection system for direct heating process furnaces, aimed at enhancing operational efficiency and safety. The system comprises an accurate dynamic model of the furnace, measuring equipment, and a fault identifier, which work in conjunction to monitor and analyze furnace performance. The dynamic model is constructed using thermodynamic principles, heat transfer, and mass transfer relationships. It is implemented on a powerful computer and calibrated using dimensional specifications and real system data. The model incorporates empirical and semi-empirical relations governing the thermodynamic conditions of crude oil, as well as heat transfer coefficients in both single-phase and two-phase regimes, considering the effects of flame height and combustion conditions. To facilitate real-time monitoring, the system employs various measuring devices, including thermocouples (7) and pressure sensors (6), to capture essential parameters such as fuel flow rate, combustion air flow rate, combustion temperature, and the temperature, pressure, and flow rates of input and output crude oil. These measured values serve as inputs to the mathematical model, allowing for the comparison of model outputs with actual system performance. The fault identifier is designed to classify data into acceptable and unacceptable categories, issuing alerts when the blockage level in the pipes (10) exceeds predetermined thresholds. This functionality enables operators to take preventive actions, such as clearing blockages or performing maintenance, ensuring optimal furnace operation. Overall, this innovative device significantly enhances the ability to detect and analyze blockages in direct heating furnaces, thereby improving operational reliability and reducing downtime, ultimately contributing to better process efficiency in industrial applications.

An automated method of measuring, monitoring and recording candle burn performance using vision system automation. The method includes timed candle flame height measurement consisting of a camera using image bursts. Recording in a database with a unique identifier barcode for each candle and corresponding wick to identify and record candle data with a date and time stamp. Audio-Visual alerts for flame callouts less than ½ inch or greater than 2 inches and 3". Documenting any extinguished candles / wicks (mid and / or end of life). Candle Temperature Measurement is performed every 2 hours (depending on burn type and cycle), which includes wax melt pool temperature (with callouts for temperatures reaching and / or exceeding 250 deg C) and container side wall temperature. Candle Picture is performed at the mid and end of life, and the sustainer position is tracked to determine wick migration.

The present application belongs to the field of warmers, and particularly relates to an outdoor gas warmer. The outdoor gas warmer comprises, from bottom to top, a gas source storage box, a valve body assembly and a combustion assembly, which constitute a tower-shaped main body as a whole; the gas source storage box is of a box structure, the valve body assembly is internally provided with an electromagnetic flow valve, a multi-pass composite gas valve, an igniter and a burner; the electromagnetic flow valve is used for controlling the gas flow, the multi-pass composite gas valve controls the gas flow direction and guides the gas to the igniter; the igniter is used for ignition; the combustion assembly comprises a glass tube with a lower end cover arranged on the burner to close the burner, and is provided with a gas valve for supplying the combustion gas into the glass tube. The present application can effectively improve the gas utilization rate, simultaneously heats through two forms of heat radiation and contact heat transfer, reduces the energy invalid loss, improves the temperature rising rate, in addition, can visually estimate the flame height to estimate the gas residual amount, can realize continuous and uninterrupted combustion and gas supply, and the use effect is obviously improved.

The invention belongs to the field of fuel fireplaces, relates to a fuel fireplace vaporizing combustion assembly and a control method thereof, and discloses the fuel fireplace vaporizing combustion assembly which comprises a combustion groove, a first fuel pipe located in the combustion groove and an ignition rod arranged on one side of the first fuel pipe. The first partition plate and the second partition plate are sequentially arranged below the first fuel pipe from top to bottom; first air holes are formed in the first partition plate, second air holes are formed in the second partition plate, and the second air holes and the first air holes are jointly arranged in the length direction of the combustion groove in a staggered arrangement mode; a second fuel pipe sequentially penetrating through the first partition plate and the second partition plate is further arranged in the combustion groove, the second fuel pipe extends to the position below the second partition plate, the invention further discloses a control method of the fuel fireplace vaporizing combustion assembly, and the control method comprises the vaporizing combustion assembly. And the combustion efficiency of the fuel is improved, so that the consumption of the fuel is reduced.

The utility model relates to the technical field of penicillin bottle manufacturing, in particular to a device for reducing the temperature of a whole bottle by changing the heating sequence, according to the device for reducing the temperature of the whole bottle by changing the heating sequence, an adjustable clamping assembly is arranged on a machine body, the clamping assembly is used for clamping a flame tube, and the spraying angle of the flame tube to the penicillin bottle can be adjusted; according to the distance between a nozzle of the flame tube and the penicillin bottle, when the penicillin bottle machined by the machine body is small in diameter, the height of the flame in the second step is adjusted to be aligned to the bottle opening of the penicillin bottle, the height of the flame in the fourth step is adjusted to be aligned to the bottle neck of the penicillin bottle, and then the bottle neck is directly subjected to plasticity in the next step after being preheated; compared with an existing method that the bottleneck is heated in the second step and then plasticized in the fifth step, the method has the advantages that the requirement for the temperature of flame for heating the bottleneck is lowered, and the effect of reducing production energy is achieved.

A flame detection system is disclosed. The flame detection system comprises one or more processors coupled to at least one flame detector and at least one image capturing device. The one or more processors identify a location of a flame by determining a base Y-coordinate, a tip Y-coordinate, a left-most X-coordinate, and a right-most X-coordinate of the plurality of pixels associated with the flame; determining that the base Y-coordinate of a most current image of the sequence of images varies less than a predefined limit of height of the flame; and determining that the tip Y-coordinate of the most current image of the sequence of images varies more than the predefined limit of height of the flame, or the left-most X-coordinate or the right-most X coordinate of the most current image of the sequence of images varies more than a predefined limit of width of the flame.

The invention discloses a plasma-assisted jet flame combustion control system and a use method thereof. The system comprises a jet combustor, a gas supply system and a monitoring control system. The jet burner is of a three-layer coaxial structure, is provided with a fuel pipe, a first wake air pipe and a second wake air pipe and is provided with two sets of electrode systems driven by independent power sources, and primary ionization ignition of fuel and secondary ionization activation of second wake air are achieved. The air supply system accurately controls the ratio of multi-component fuel to air. The monitoring control system realizes high-precision online measurement of the flame height, adopts a multi-frame statistics and probability modeling method, combines OTSU adaptive segmentation and pixel level calibration technologies, and significantly improves the accuracy. The system can obtain the flame height in real time and dynamically adjust the secondary ionization intensity, so that the combustion state is accurately regulated and controlled, the phenomenon that the flame is too high or too low is effectively restrained, the combustion efficiency, stability and response speed are improved, and the system is suitable for low-carbon clean combustion application scenes.

The invention relates to the technical field of oil product combustion leakage prevention and control, and provides a porous medium vertical isolation device for simulating flowing fire diffusion combustion and an evaluation method.The porous medium vertical isolation device comprises a T-shaped rack, a leaked oil supply module and a leaked oil collection tank, and an oil leakage groove used for oil product flowing is formed in the surface of the T-shaped rack; a channel used for containing a porous medium filter material and an oil outlet pipe used for collecting vertical seepage leaked oil are further arranged in the T-shaped rack, a high-energy ignition device is further arranged at the output end of the leaked oil supply module, and the data acquisition module is used for monitoring the combustion flame height, the combustion heat radiation intensity and the combustion flame temperature. Through the arrangement of the leaked oil supply module, the oil leakage groove and the porous medium filter element, the design of a prevention and control belt for flowing leaked oil flowing fire under the combustion condition through porous media with different infiltration capacities can be achieved, and then the infiltration capacity of different leaked oil products passing through the prevention and control belt in an oriented mode is achieved; and a support is provided for constructing an efficient porous medium prevention and control belt.

The utility model relates to an alcohol fireplace structure, which comprises a shell, a liquid storage box and a high-temperature gasification box device which are arranged in the shell, a combustion box device which is communicated with the high-temperature gasification box device is arranged on the shell, and the alcohol fireplace structure is characterized by further comprising a preheating box device which is arranged in the shell, the liquid storage box, the preheating box device and the high-temperature gasification box device are sequentially communicated, and the heating temperature of the preheating box device is lower than or equal to that of the high-temperature gasification box device. By arranging the preheating box device, low-temperature alcohol in the liquid storage box is preheated in the preheating box device before flowing into the high-temperature gasification box device, and then the preheated alcohol is conveyed into the high-temperature gasification box device, so that the temperature difference is greatly reduced to maintain the output of gas alcohol; and the flame height can be kept stable, so that the stability of the heating temperature is ensured, and the use experience feeling of a user is ensured.

The distributor is provided with an outer ring groove with an upward opening, a plurality of outer ring flow dividing holes are formed in the groove bottom of the outer ring groove at intervals in the circumferential direction, and the outer ring flow dividing holes are communicated with the outer ring groove to form an outer ring air channel. The horizontal cross sectional areas of all the outer ring flow dividing holes are gradually increased in the clockwise or anticlockwise direction. According to the distributor disclosed by the utility model, the uniformity of gas and air in the outer ring in the distributor is realized, and the mixture of the gas and the air in the outer ring is ensured to be uniformly sprayed out from the outer ring fire holes, so that the flame height of the outer ring is kept consistent. The utility model further discloses a burner.

The utility model discloses a graded non-slag fixed bed gasifier, which comprises: a pressure-bearing shell, the top of which is provided with a material inlet, the bottom of which is provided with a slag outlet, the pressure-bearing shell is provided with a gasifying agent inlet, and the upper part of the side wall of the pressure-bearing shell is provided with a first synthesis gas outlet; the fire grate is arranged at the lower part of the pressure-bearing shell, air outlet holes in the radial 0.7-0.8 D of the fire grate are central channels, the rest air outlet holes are edge channels, and the ratio of the total sectional area of the air outlet holes in the central channels to the total sectional area of the air outlet holes in the edge channels is (2-3): 1. The ratio of the center channel to the edge channel in the fire grate is changed, the ventilation capacity of the center channel of the fire grate is increased, the flame height of the fire grate is increased, and then the height of a gasification bed layer in a hearth and the handling capacity of raw materials are increased.

This invention discloses an outer ring burner cap, relating to the field of burner technology. The outer ring burner cap includes an upper burner cap and a lower burner cap. The upper burner cap fits onto the lower burner cap to form an inner ring of flame holes, located on the radially inner sidewall of the outer ring burner cap. The inner ring of flame holes includes a first flame hole and a second flame hole. In the circumferential direction of the outer ring burner cap, the upper burner cap can rotate relative to the lower burner cap between a first extreme position and a second extreme position to change the difference in size between the first and second flame holes. When the upper burner cap rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring burner cap, the first flame hole gradually enlarges, and the second flame hole gradually decreases, thereby changing the difference in size between the first and second flame holes. This changes the overall flame height of the inner ring of flame holes, thus altering the degree of heating of the inner ring of the pot bottom and preventing uneven heating of the food inside the pot due to uneven heat distribution between the inner and outer rings.

The invention relates to the technical field of light control, in particular to a control method and device based on a lamp bead simulation flame effect and a terminal. The method comprises the following steps: calculating flame offset according to acquired lamp bead arrangement information, lamp bead quantity and user preference parameters; according to the number of the lamp beads and the flame offset, the virtual flame height is calculated, and a virtual flame coordinate system is constructed; a flame layering model is constructed, flame is divided into a flame core layer, an outer flame layer and a flame tip layer in the flame layering model, the flame core layer is simulated through virtual lamp beads, and the flame tip layer corresponds to real lamp beads; on the basis of the virtual flame coordinate system and the flame layering model, temperature changes of the virtual lamp beads are calculated, and heat of the virtual lamp beads is made to be transmitted upwards in the longitudinal direction; and mapping the temperature distribution of the flame core layer to a real lamp bead, and determining the display color of the real lamp bead according to the temperature. The problems that the flame layering sense is weak, the dynamic effect lacks the real heat conduction characteristic, and the lamp bead array adaptability is limited can be solved.

This application belongs to the field of burners, and discloses an optimization method, device, computer device, and readable storage medium for a burner. The burner includes a combustion chamber. The method includes: obtaining the designed length and designed porosity of a porous support plate in the combustion chamber; inputting the designed length and designed porosity of the porous support plate into a pre-established combustion simulation model of the combustion chamber to output the flame height in the combustion chamber; if the flame height output by the combustion simulation model of the combustion chamber is greater than a preset flame height threshold, adjusting the designed length and / or designed porosity of the porous support plate, and performing the step of inputting the designed length and designed porosity of the porous support plate into the pre-established combustion simulation model of the combustion chamber until the flame height output by the combustion simulation model of the combustion chamber is less than or equal to the preset flame height threshold. Using this application, the combustion chamber can be designed based on making the flame height more reasonable.

The present application relates to hydrogen pipeline test test technical field, disclose a kind of high-pressure large-diameter hydrogen pipeline jet fire flame shape multi-source image measurement method, the method comprises: the synchronous acquisition of multi-source image data is carried out, and space calibration and coordinate uniformity are carried out;Select the video clip of jet fire flame stable combustion stage, output video as high-resolution image sequence frame by frame, and carry out pre-processing;The flame region boundary extraction of each frame image after pre-processing is carried out;Intermittent degree method is used to each frame image superimposed statistical flame appearance frequency, form flame probability distribution diagram;In the unified coordinate system, calculate flame shape parameter;The weight of each image source is calculated, and the flame boundary and flame shape parameter obtained by different image sources are uniformly fused according to the weight of each image source. Using the present application scheme, the high-precision, repeatable, traceable measurement of flame height, width, ground clearance, inclination and other shape parameters can be realized.

The utility model discloses a fire grate and gas equipment, and relates to the technical field of combustion. Wherein the fire grate comprises a shell, a combustion cover and a metal net, and an airflow channel is formed in the shell; the combustion cover is arranged at the top of the shell and provided with a plurality of first fire holes communicating with the airflow channel. A plurality of first riveting parts are arranged on the top surface of the combustion cover; the metal net is arranged on the upper surface of the combustion cover and covers the first fire holes. The metal net is pressed and fixed to the upper surface of the combustion cover through the first riveting parts. According to the technical scheme, the height of flames can be reduced, the flames are uniform, and the purposes of sufficient combustion and reduction of nitrogen oxide emission are achieved.

The utility model discloses a film horizontal and vertical combustion instrument which comprises a test box, a sliding rail is fixedly installed at the bottom of an inner cavity of the test box, a sliding block is connected to the sliding rail in a sliding mode, a Bunsen burner base is fixedly installed at the top of the sliding block, and an adjustable Bunsen burner is installed on the Bunsen burner base. A film support rod is fixedly mounted at the upper part of the inner cavity of the test box; a film clamp is arranged at the end part of the film support rod; and the Bunsen burner base is connected with a methane gas cylinder through a gas pipe. The flame height can be controlled through the adjustable Bunsen burner, the distance between the flame and a sample is controlled by fixing the position between the test box and the adjustable Bunsen burner, the standard requirement is met, and environmental pollution and poisoning of operators are avoided.