449 results about "Smoke flow" patented technology

The utility model discloses a plate heat exchanger, belongs to the field of air pre-heaters, solves the problem that in the prior art, plates of a plate heat exchanger are prone to damage when heat exchange is conducted in dust-containing flue gas, and adopts the technical scheme that the plate heat exchanger comprises a heat exchange plate, and the heat exchange plate is formed by welding and fixing two thin plates through a plurality of welding parts; the non-welded portions of the thin plates are far away from each other to form a gas flowing cavity, the edges, close to the smoke flowing-in side, of the two thin plates of the heat exchange plate are first ends, the first ends are fixed through welding parts, guiding pieces are installed at the first ends, and the thickness of the guiding pieces is larger than that of the two thin plates. The dust-containing flue gas heat exchanger is mainly used for realizing heat exchange in dust-containing flue gas at low cost.

The invention discloses an intelligent layering and guiding device for highway tunnel fire smoke and a control method, and relates to the technical field of tunnel fire safety, a smoke flow Froude number is introduced as a direct control target, the parameter represents the ratio of smoke flow inertia force to buoyancy force, the numerical value directly determines the stability of a layering interface, and the layering interface can be directly controlled. The Froude number of each subarea of the tunnel is calculated in real time through a sensing network and is compared with a critical value calibrated through an experiment, when a real-time value is lower than the critical value, it is indicated that inertia force is relatively insufficient, the buoyancy effect is dominant, and instability and entrainment are likely to happen to an interface between a smoke layer and lower cold air, and then according to a control algorithm, the smoke layer and the lower cold air are controlled. The micro jet fan applies directional inertia force to a smoke layer by adjusting the angle and the speed, the intelligent induction smoke outlet optimizes local pressure difference and flow by adjusting the opening degree and assists in maintaining flowing, the smoke flowing state is actively locked in a stable layered flow interval, and mixing and sedimentation caused by flow state instability are prevented.

The invention provides a CFD optimization-based air volume matching and linkage control method and system for a smoke prevention and exhaust system of an underground powerhouse, and belongs to the technical field of underground smoke exhaust systems. The method comprises the following steps: performing physical modeling according to an actual underground powerhouse, and performing grid division, solver selection, boundary condition setting and airflow field change simulation to obtain an initial airflow field; cFD is adopted to simulate temperature changes, smoke concentration changes and airflow changes in different fire scenes, wind flow and smoke flow in the underground powerhouse are analyzed, the defects of an existing system are evaluated, and smoke exhaust pipeline arrangement and fan configuration are optimized according to the defects; the airflow change in the fire environment is dynamically calculated by combining the real-time monitoring system and the CFD, and the air volume of the pressurized air supply system, the smoke exhaust system and the air supplement system is adjusted. Efficient linkage of the system is achieved, while personnel evacuation safety is guaranteed, the smoke exhaust efficiency and the emergency response capacity are improved, energy consumption is reduced, and the dual goals of energy saving and efficiency improvement are achieved.

The invention discloses a fire-fighting smoke exhaust pipeline laying planning system based on an industrial cloud platform, and relates to the technical field of pipeline laying planning, and the system comprises a building information collection module which collects building data; the cloud edge cooperative computing module is used for constructing a smoke exhaust simulation model by using distributed computing resources of an industrial cloud platform and carrying out real-time parameter iteration through edge nodes; the pipeline path planning module is used for generating a plurality of candidate laying paths by using an improved algorithm and carrying out path optimization based on a pipeline resistance coefficient and a construction cost constraint condition; and the scheme verification and optimization module is used for carrying out smoke flow dynamics simulation verification on the optimal path scheme, identifying scheme defects and carrying out iterative optimization on path parameters through a genetic algorithm. According to the invention, through a cloud-edge collaborative intelligent computing architecture, a multi-dimensional constrained dual-target optimization mechanism and a dynamic adaptive path planning and verification system are fused, and collaborative improvement of fire-fighting smoke exhaust pipeline laying planning in accuracy, efficiency and compliance is realized.

The invention is suitable for the technical field of flue gas waste heat utilization, and provides a high-temperature flue gas heat exchanger which comprises a heat exchange assembly, and a flue gas inlet assembly is fixed to the top of the heat exchange assembly; the heat exchange assembly comprises a box part, a water inlet part inserted into the box part and a plurality of heat conduction parts slidably arranged on the water inlet part, and the smoke inlet assembly comprises a smoke inlet part, a displacement part slidably arranged in the smoke inlet part and a blocking part slidably arranged in the smoke inlet part. The high-temperature flue gas heat exchanger solves the technical problems that in the using process of an existing high-temperature flue gas heat exchanger, heat exchange tubes and fins in the high-temperature flue gas heat exchanger are mostly fixedly connected into the high-temperature flue gas heat exchanger, the heat exchange effect of the high-temperature flue gas heat exchanger is too poor, and the heat exchange effect of waste heat in flue gas is reduced. The technical effects that smoke flow in the heat exchange box can be accelerated, the heat exchange effect of the multiple fins and the smoke in the heat exchange box is improved, and the later heat exchange efficiency is improved are achieved.

The invention provides a lithium ore roasting waste heat recovery device and a process for extracting beryllium from lithium-containing ore. The waste heat recovery device comprises a box body, an adjusting mechanism and a heat exchange pipe. A first dispersion cover and a second dispersion cover are mounted on the left side and the right side of the box body through bolts, and the adjusting mechanism is located outside the second dispersion cover; the adjusting mechanism comprises a discharge pipe, a mounting cover and an adjusting motor, the discharge pipe is fixedly arranged at the outlet end of the second dispersion cover, and the mounting cover is hermetically mounted at the outer end of the discharge pipe through a bolt. The flow channel of the heat exchange element is designed to be of a reducing structure with a thick inlet and a thin outlet, at the moment, a high-temperature section at the inlet position can fully exchange heat, but the heat of smoke entering a low-temperature section is not higher than that of the high-temperature section, the inner diameter of the outlet section can be reduced, the smoke flow is small at the moment, and therefore most smoke can be gathered in the low-temperature section, and full heat exchange of the low-temperature section can be achieved.

The invention provides a soft measurement method and system for flue gas flow of a coal-fired boiler, a medium and a program product, and relates to the technical field of electric digital data processing. Firstly, historical equipment operation data of a power plant distributed control system and a continuous emission monitoring system in a set time period are collected, and the historical equipment operation data cover boiler load, air volume and other information. And meanwhile, historical flue gas flow measured data at flue measuring points with different heights in the same set period are obtained. Secondly, determining a flue gas flow prediction model through machine learning by taking historical flue gas flow actual measurement data as dependent variables and historical equipment operation data as covariables; after current equipment operation data are obtained, the current equipment operation data are input into the model to obtain flue gas flow prediction data of different heights, and finally the prediction data are sent to a management end to be displayed, by implementing the method, the limitation of traditional single-point measurement can be broken through, and the flue gas flow condition in a flue can be comprehensively reflected.

The utility model discloses a circulating fluidized bed boiler furnace outlet horizontal flue ash removal device which comprises a furnace, a horizontal flue, a cyclone separator, a high-temperature superheater, a low-temperature superheater, a coal economizer and an ash removal device, one end of the ash removal device is arranged at the bottom of the horizontal flue, and the other end of the ash removal device is arranged at the lower end of the coal economizer. The ash removal device comprises a primary air pre-heater, a conveying air pipe, a conveying air branch pipe and an ash removal module, and the ash removal module is arranged at the bottom in the horizontal flue and comprises a main air pipe, a branch air pipe, a connecting rod and a small air cap. A small part of primary air is led to the bottom of the horizontal flue at the hearth outlet through the bypass pipeline of the primary air pre-heater and enters the ash removal device, accumulated ash accumulated at the horizontal flue at the hearth outlet is loosened and fluidized through the small air cap and then enters the cyclone separator along with flue gas, and therefore the purpose of removing the accumulated ash in the horizontal flue at the hearth outlet is achieved. After accumulated ash is cleaned, the smoke flow speed of a hearth outlet is reduced, and the efficiency of the boiler is improved.

The invention relates to the technical field of baking, and discloses an oxygen-rich combustion heat radiation baking device which comprises a baking ladle, a ladle cover, a roaster and a flue gas circulation unit. The ladle cover covers the top opening of the baking ladle; a smoke outlet is formed in the ladle cover and is communicated with the interior of the baking ladle; the roaster comprises a heat radiation sleeve, and the heat radiation sleeve is fixed to the ladle cover, located in the roasting ladle and extends in the first direction; the first direction is a vertical direction; an air inlet of the smoke circulating unit is communicated with the smoke outlet, and an air outlet is communicated with the interior of the baking ladle; a combustion channel for fuel gas and oxygen is formed in the heat radiation sleeve, and smoke flows out of an outlet of the heat radiation sleeve, then sequentially flows through the interior of the baking ladle, the smoke outlet and the smoke circulation unit and enters the baking ladle again through the smoke circulation unit to circularly flow. According to the invention, the baking temperature can be quickly increased to the required level by only needing a small amount of fuel gas, the baking time is shortened, the heat utilization efficiency is improved, and zero emission of flue gas is realized.

The utility model discloses handheld high-negative-pressure dust removal equipment, which relates to the technical field of welding fume treatment and particularly comprises a device body, an air inlet end of the device body is connected with a welding fume flowing pipe, and the other end of the welding fume flowing pipe is connected with a welding gun of manual welding equipment through a dust collection suite. The other end of the welding fume flowing pipe is fixed on the body of a worker through a fixing structure; the dust collection suite comprises a main body, the main body is of a hollow structure, and a through hole is formed in one end of the main body. The handheld high-negative-pressure dust removal equipment is located at the front end of a welding gun and can effectively absorb harmful smoke dust generated in the welding process; the arms and the back or the waist of a worker are fixed, so that the weight borne by the hands of the worker during welding is effectively reduced, the labor intensity of the worker is reduced, and the production efficiency is improved; the dust collection suite connected with the welding gun is various in specification, can be matched with welding guns of different specifications and models in the market, and is wide in application range.

The invention relates to the technical field of anti-blocking of air preheaters, in particular to an anti-blocking device for a boiler air preheater, which comprises an air preheater and an air outlet hopper fixedly connected to the circumference of the bottom of the air preheater, and an air inlet hopper is fixedly connected to the top of the air preheater along the circumference. Preheating pipes are evenly and fixedly connected between the top and the bottom of the air preheater in a penetrating mode at intervals, a transverse plate is fixedly connected to the inner side of the air preheater, and the preheating pipes fixedly penetrate through the transverse plate. When flue gas is discharged into the preheating pipe, an electric heating wire is started, then an electric lead screw is started to rotate forwards and backwards alternately to drive an n-shaped plate to move up and down, the n-shaped plate drives a scraping plate to move up and down, and the scraping plate drives the electric heating wire to move up and down to heat the lower portion of the preheating pipe, so that the temperature of the preheating pipe is higher than the dew point of water vapor and acid gas in the flue gas; and meanwhile, dust attached to the outer wall of the preheating pipe is scraped away through a scraping plate, blockage caused by dust attached to the inner wall of the preheating pipe can be prevented through the heating effect of a spiral scraping plate and an electric heating wire, and therefore the smoke flowing efficiency is improved.

The invention discloses an experimental platform for testing the combustion behavior of a photovoltaic module. The experimental platform mainly comprises a photovoltaic fire simulation system, a smoke collection system, a spraying system, an ignition module and a monitoring system. The photovoltaic fire simulation system mainly comprises a fixing assembly, a building material, an adjustable support, an electric telescopic module and a photovoltaic sample and is used for accurately simulating a building photovoltaic system scene. The smoke collection system is used for increasing a smoke circulation path and filtering smoke; the spraying system is used for performing water spraying filtration on the smoke dust and purifying the filtered sewage; the ignition module is used for simulating ignition sources with different widths and fire source powers and igniting the photovoltaic sample; the monitoring system is used for monitoring the temperature distribution condition, the internal flow field distribution and the mass loss of the photovoltaic sample, the total mass of the filtered smoke and the temperature signal and the radiation heat flow distribution condition of the building material in real time, so that the combustion and spreading conditions of different types of building photovoltaic fire hazards are determined; and thoughts and references are provided for building photovoltaic fire prevention design.

The invention discloses adjustable flue gas desulfurization demisting equipment, and relates to the technical field of environmental protection engineering, the adjustable flue gas desulfurization demisting equipment comprises a demisting machine, the outer wall of the bottom end of the demisting machine is fixedly provided with a flue gas inlet pipe, the top of the demisting machine is fixedly provided with an exhaust passage, and the outer wall of the top end of the demisting machine is slidably provided with an outer pull box. When smoke flows on the surface of the flow guide plate, smoke dust in the smoke can be attached to the inner wall of the flow guide plate, a motor is started, the motor drives a rotating rod to rotate, the rotating rod drives an L-shaped fixing frame to rotate, the L-shaped fixing frame drives a sliding rod to rotate, the sliding rod drives a connecting block to rotate, the connecting block drives a scraping plate to rotate, and the scraping plate scrapes away the smoke dust on the surface of the flow guide plate. According to the demister, the surface of the guide plate is kept clean, possible obstruction of smoke dust accumulation on smoke flowing is prevented, continuous and efficient operation of the demister is ensured, and therefore the treatment efficiency and stability of the whole demister are improved.

The invention relates to the technical field of fire monitoring, in particular to an intelligent fire monitoring and early warning method. A Gaussian distribution model is introduced to simulate the diffusion effect of a heat source, the adaptability of smoke flowing to airflow in a building is enhanced, limitation of a traditional smoke diffusion model is corrected and optimized according to local turbulence driven by differential pressure, especially the non-uniform airflow effect in areas such as narrow galleries and courtyards, and accurate monitoring and early warning of fire disasters are achieved. The expected speed and comfortable distance of the crowd are dynamically adjusted by combining light flow sensing with environment sensing (such as smoke concentration and temperature), and the problems of people flow and evacuation path optimization in a high-density scene can be effectively solved. Especially in a narrow space, interaction between crowds and obstacles can be fed back in real time, and secondary accidents caused by crowd density or high temperature and smoke influence are prevented.

The invention provides a heat recovery device of an air preheater, relates to the field of heat recovery of air preheaters, and aims to solve the problems of flue gas heat loss and insufficient heat recovery in the prior art. The device comprises an air preheater body, a flue gas filter, a fan, a preheating outer frame body, a heat preservation shell plate and the like. The air preheater body is provided with an air inlet pipe opening, an air outlet pipe opening and a heat exchange cavity, and a two-stage filter screen plate of the flue gas filter ensures that the flue gas is clean. The fan drives the spiral blades to make smoke flow spirally, and the circulation path is increased. A spiral liquid guide channel of the preheating outer frame body is communicated with a heat exchange pipeline, and heat exchange between water and smoke and heat exchange between the water and the smoke and the outer shell body are achieved through a booster pump. The heat preservation shell plate reduces heat loss. All the components work cooperatively, heat loss of the shell is effectively reduced, heat recovery efficiency is improved, and the heat exchanger is suitable for the fields of industrial boilers and the like and has remarkable energy-saving and environment-friendly significance.

The application belongs to the technical field of emergency management and control, and specifically discloses a flexible blocking device, which comprises a box body, a smoke forming unit is installed in the box body, and a light curtain belt forming unit is further installed on one side of the box body; the smoke forming unit comprises an air inlet cover, a fan and a smoke flow guide cover which are connected in sequence; the air inlet cover is provided with a smoke storage tank; the smoke flow guide cover comprises an upper flow guide cover and a lower flow guide cover, a flow guide grating surface is arranged on the smoke outlet of the flow guide cover, and the flow guide grating surface comprises a plurality of vertically and spaced flow guide gratings; flow guide columns are arranged in the upper flow guide cover and the lower flow guide cover, and the closed surfaces of the two flow guide columns form smoke outlet annular bands with the inner sides of the upper flow guide cover and the lower flow guide cover respectively; the light curtain belt forming unit comprises a mounting frame, a plurality of aspheric lenses and a plurality of LED light sources, the mounting frame is hollow, and the plurality of aspheric lenses and the plurality of LED light sources are arranged opposite to the two sides of the mounting frame respectively. The application can form a smoke curtain belt with uniform laminar flow, and can form a more eye-catching flexible blocking effect in combination with the light curtain belt.

The invention provides a digital twin emergency evacuation method and system for a highway tunnel. The method comprises the steps that S1, multi-source fire data of multiple positions in the tunnel are collected at fixed time intervals; s2, constructing a temperature field model, and calculating the thermal strain of each position based on the multi-source fire data; s3, constructing a structural field model, generating local stress of each position according to the thermal strain, then correcting temperature field model parameters by using the local stress, and then repeating the steps S2 to S3 until the local stress does not change any more; s4, constructing a smoke flow field model, calculating the fire source power of each position according to the multi-source fire data, and calculating the smoke flow diffusion rate of each position by using the smoke flow field model according to the fire source power; and S5, generating an optimal personnel evacuation scheme according to the smoke flow diffusion rate and the local stress of each position. According to the method, the problems that in the prior art, prediction of the fire development situation by using a static model is inaccurate, and accurate support cannot be provided for emergency decision making are solved.

The invention discloses a limestone desulfurization wastewater treatment method, which is based on a conventional desulfurization wastewater high-temperature evaporation treatment process, high-temperature flue gas is divided into two flue gas streams, and one flue gas stream is subjected to dust removal and compression and then is merged into a desulfurization wastewater inlet pipe, so that the initial temperature of the desulfurization wastewater entering an evaporation tower is increased, and the desulfurization wastewater can be recycled. And for the other stream of smoke flow, under the synergistic effect of a smoke diffusion mechanism and a flow guide structure in the evaporation tower, the other stream of smoke flow is conveyed downwards to different positions and then reversely flows upwards to be in contact with the fog drops, so that not only is the conveying and diffusion direction of the smoke flow controlled, but also the heat medium is effectively transferred; according to the device, efficient dispersion contact of flue gas and fog drops is achieved, the evaporation effect is improved, downward fog drops which do not fully react are evaporated, in addition, multiple sets of rotating heat transfer scrapers are matched, on one hand, the flue gas and the fog drops which are in up-down countercurrent contact are rotationally stirred, and on the other hand, crystals are scraped.

The utility model discloses an electronic cigarette. The electronic cigarette comprises a cigarette rod and a cigarette cartridge. The cigarette rod comprises a shell. A water flow channel and a smoke oil flow channel are formed in the shell. The connecting end of the shell is provided with a first connecting hole, a second connecting hole and a confluence hole. The first connecting hole communicates with one end of the water flow channel. The second connecting hole is communicated to one end of the tobacco oil flow channel. The confluence hole is communicated with the other end of the water flow channel and the other end of the smoke oil flow channel. The cartridge is connected to the connection end of the housing. The smoke cartridge comprises mutually independent water containing cavities. A tobacco tar containing cavity and a smoke flow channel. The water containing cavity is communicated with the first connecting hole. The tobacco tar containing cavity is communicated with the second connecting hole. The smoke flow channel is communicated with the confluence hole. And the water flow channel and the smoke oil flow channel are Tesla valve channels which are reversely arranged in the direction close to the confluence hole. According to the smoke cartridge, the resistance of liquid in the smoke cartridge flowing to the confluence hole can be increased, so that the liquid in the smoke cartridge is effectively prevented from flowing out due to shaking.

The utility model discloses a smoking machine suitable for smoking food materials. The smoking machine comprises a smoking furnace, a smoke generator and a circulating fan assembly, the smoking furnace comprises an outer box shell and a smoking chamber; the smoke generator comprises a smoke shell and a smoke hanging box; the fuming hanging box is detachably mounted in the fuming shell; the circulating fan assembly is arranged at the top of the smoking chamber and can form circulating airflow and suck smoke in the smoking chamber back to the smoking chamber. According to the utility model, the circulating fan assembly is arranged at the top of the smoking chamber, circulating airflow can be formed between the smoking chamber and the smoke generator, and the flowing efficiency of smoke in the smoking chamber is accelerated, so that on one hand, the smoke can be better and uniformly covered on the outer surface of food, and under the working condition that the smoke flows quickly, the smoking concentrations of upper and lower smoking areas are close to each other; the smoking effect of the food materials is more uniform; on the other hand, due to the accelerated flowing of the smoke, the smoking and pickling efficiency can be improved, and the processing and cooking efficiency of the food materials is improved.

The utility model provides an efficient condensation type fuel gas volumetric water heater, and relates to the technical field of water heaters, the efficient condensation type fuel gas volumetric water heater comprises a shell, a condensation cover is arranged in the shell, an inner container barrel is arranged in an inner cavity of the condensation cover, and an upper cover seal head and a lower cover seal head are fixedly arranged at the two open ends of the inner container barrel respectively; an annular smoke channel is formed between the outer side wall of the inner container barrel and the inner side wall of the condensation cover, a first communicating smoke cavity is formed between the outer wall of the upper cover end socket and the inner wall of the upper portion of the condensation cover, and a second communicating smoke cavity is formed between the outer wall of the lower cover end socket and the inner wall of the lower portion of the condensation cover. Smoke sequentially flows through the main heat exchange smoke pipe, the third communicating smoke cavity, the secondary heat exchange smoke pipe, the first communicating smoke cavity, the annular smoke channel, the second communicating smoke cavity and the condensation smoke exhaust pipe connector, high-temperature smoke flows through the smoke pipe in the inner container and completely wraps the inner container, and therefore the heat exchange efficiency is improved.

The application provides a range hood, and relates to the technical field of kitchen appliances. The range hood comprises a main machine box, a fan and a flow guide piece. The fan is arranged in the main machine box, and the fan has a fan inlet. The flow guide piece is arranged in the main machine box, one end of the flow guide piece is connected with the fan, and a pre-rotation fan is arranged in the flow guide piece, and the pre-rotation fan is used for pre-straightening smoke flowing into the flow guide piece. In this way, the range hood has smaller noise and higher smoke exhaust efficiency.

The utility model discloses an energy-gathering plate pot rack and a gas cooker, and belongs to the technical field of kitchen appliances. The energy-gathering disc pot rack comprises an energy-gathering disc body and a support, the support is arranged on the energy-gathering disc body, and an L-shaped high-temperature smoke flow guide channel is formed between the bottom of the support and the inner side wall of the energy-gathering disc body and between the outer side wall of the support and the inner side wall of the energy-gathering disc body. The L-shaped high-temperature flue gas flow guide channel can conduct layered flow guide on combustion high-temperature flue gas in the energy gathering disc body, one part flows from the upper end of the support, the other part flows from the lower end of the support and flows upwards from the horizontal direction to the vertical direction along the L-shaped high-temperature flue gas flow guide channel, and meanwhile the high-temperature flue gas flowing at the upper end of the support is impacted to form turbulent flow. Therefore, the flow rate of high-temperature flue gas in the energy-gathering disc pot rack is delayed, the heat exchange time of the high-temperature flue gas and the pot bottom is prolonged, meanwhile, the impact strength of the high-temperature flue gas to the pot bottom is improved, the heat exchange effect of the high-temperature flue gas and the pot bottom is enhanced, and the combustion heat efficiency of the gas stove is improved.

The application provides a heater air inlet and exhaust device for a travel vehicle, and belongs to the field of travel vehicle heater accessories. The device comprises a nested exhaust pipe, an air inlet pipe, a positioning frame and a cover. An annular fixing plate is arranged between the exhaust pipe and the air inlet pipe, a first baffle is arranged in the inner cavity of the exhaust pipe, the first baffle is connected with a second baffle, the inside of the cover is divided into upper and lower areas by means of the above structure, the smoke flow space and the air inlet flow space are distinguished, and smoke backflow is effectively prevented. The side wall of the cover is provided with a louvered second smoke outlet, the bottom end is provided with a second air inlet, the bottom end of the air inlet pipe is provided with a first air inlet, and the two air inlets are communicated to form an air inlet passage. The air inlet pipe and the cover jointly form an annular drainage groove, which can timely drain the water accumulated in the exhaust pipe. The device only needs to be opened at a single position of the vehicle body, has the functions of preventing smoke backflow, preheating air inlet, automatically sucking air inlet by smoke negative pressure, collecting and discharging condensate water, has a compact structure and stable operation, and is suitable for various travel vehicle parking heaters.

The utility model relates to the technical field of integrated stoves, in particular to a multifunctional smoke exhaust device of an integrated stove. The smoke exhaust device comprises a smoke exhaust pipe and a sleeve, a first smoke exhaust port is formed in the rear end of the smoke exhaust pipe, the sleeve is arranged at the rear end of the smoke exhaust pipe, a second smoke exhaust port is formed in the sleeve, the first smoke exhaust port is communicated with the second smoke exhaust port, smoke flows through the smoke exhaust pipe from front to back, is exhausted through the first smoke exhaust port and then enters the sleeve, and the sleeve is communicated with the smoke exhaust pipe. And then the smoke is discharged from the second smoke outlet from back to front. A support is arranged at the bottom of the smoke exhaust pipe, an oil collecting box is connected to the support in a sliding mode, and the oil collecting box is located under the second smoke exhaust port. The smoke exhaust device can prevent smoke from flowing backwards into the smoke exhaust pipe due to external air injection, prevent sparks from splashing and collect oil stains, and is diversified in function and convenient to use.

The utility model belongs to the field of blast furnace equipment, and relates to a blast furnace gas heating system which comprises a valve of a blast furnace gas pipeline, a cyclone dust collector, a flowmeter, a thermometer, a valve of a flue gas pipeline and a heat exchanger, and a heating gas source is taken from flue gas of a hot blast stove. The system is arranged between a blast furnace gravity dust collector and dry dust collection and serves as a bypass of a normal gas pipeline. When the blast furnace gas is low in temperature and needs to be heated, the flue gas adjusting valve on the hot blast stove flue gas pipeline is opened, high-temperature hot blast stove flue gas enters the heat exchanger, meanwhile, the gas adjusting valve on the heating system pipeline is opened, and the blast furnace gas flows through the heated heat exchanger after passing through the cyclone dust collector, so that the blast furnace gas is heated and then flows to the dry dedusting system. Heated hot-blast stove smoke flows back to the hot-blast stove waste gas pipeline and is discharged through a chimney. Blast furnace gas is heated through hot blast stove flue gas, low-temperature gas is prevented from directly entering a dry-method system, cloth bag hardening is prevented, normal work of the dry-method system is ensured, and the operation stability of a blast furnace system is improved.

The utility model relates to the field of integrated cooker, specifically disclose a kind of exhaust pipe connecting head for integrated cooker, the flue of reverse T shape is formed in joint main body, the top of joint main body forms upper interface, the left and right sides of joint main body are equipped with the side interface of connectable exhaust pipe;It further includes detachably connected the cover of one side interface, cover is located in flue and connects guide block one side, guide block other side forms the guide surface that oil smoke is guided to another side interface, guide surface is curved into arc from top to bottom, arc surface is close to upper interface below, the bottom of joint main body is concave and forms oil receiving groove, oil receiving groove is equipped with oil discharge hole, and oil discharge hole is connected with oil outlet valve. Two side interfaces can be connected with exhaust pipe, increase the smoke exhaust volume;One side interface can be selected to be connected, cover closes another side interface, facilitates changing smoke direction in later period, guide block and guide surface guide the oil smoke flowing to cover to exhaust smoke;Oil groove collects oil dirt, and is discharged through oil discharge joint.

The utility model discloses a hazardous waste incineration waste heat boiler with an internal hanging screen. The hazardous waste incineration waste heat boiler comprises a steel frame, a boiler barrel and a boiler body. The boiler body comprises a hearth, and partition walls are arranged in the hearth to divide the hearth into a plurality of cavities which are sequentially communicated in the smoke flowing direction. In the chambers, the chamber communicated with the flue gas inlet of the hearth is a first chamber, and the chamber communicated with the flue gas outlet of the hearth is a second chamber; a hanging screen heating assembly is arranged in the second cavity; the hanging screen heating assembly is a plurality of groups of heating surfaces formed by an upper header, a lower header and a membrane wall, and the distance between the heating surfaces of the hanging screen heating assembly is not less than 800mm; the hanging screen heating assembly is hung in the steel frame through the hanging assembly, and meanwhile shock wave ash removal devices are arranged between the heating surfaces of the hanging screen heating assembly in the height direction. Therefore, according to the hazardous waste incineration waste heat boiler, the requirement for the heating area is met, the height and the occupied area of the hazardous waste incineration waste heat boiler are reduced, and the equipment cost and the site utilization rate are effectively reduced.

The invention relates to the technical field of range hoods, in particular to a smoke sensing assembly for a range hood, the range hood and an integrated cooker, and aims to solve the problem that an existing smoke sensing module is poor in installation universality. The smoke sensing assembly provided by the invention comprises a smoke sensing module used for detecting smoke flowing through the smoke sensing module; the connecting pieces comprise the first connecting piece and the second connecting piece, the first connecting piece and the second connecting piece are connected in a pivoted mode through a pivot shaft, the smoke sensing module is connected to the first connecting piece, a first connecting point is arranged at the position, away from the pivot shaft, of the first connecting piece, and a second connecting point is arranged at the position, away from the pivot shaft, of the second connecting piece; the smoke sensing assembly can be connected to a smoke sensing installation position of the range hood through the first connection point and the second connection point. According to the smoke sensing assembly provided by the invention, the structure of the smoke sensing assembly can be adjusted according to the installation point position of the smoke sensing installation position so as to adapt to the installation point position, the universality of the smoke sensing assembly is improved, and modular installation is facilitated.

The invention provides a fire-fighting emergency management system and a fire prediction method, and the method comprises the steps: carrying out the fire monitoring of a target region, and collecting a fire image of the target region; performing region segmentation on the fire image to obtain a plurality of flame regions of the target region, determining a concentration gradient of smoke in each flame region based on color distribution of the smoke in each flame region, and determining smoke spreading characteristics in the target region according to the concentration gradients of all the smoke; acquiring fire environment data in the fire occurrence process of the target area, and determining a heat transfer relationship generated when smoke flows in the target area based on the fire evolution model in combination with the fire environment data; the thermal runaway state of the fire is predicted through the heat transfer relation and the smoke spreading characteristics, and then the confidence fire situation in the target area is obtained; and the fire alarm sends a fire alarm to the fire-fighting command center based on the confidence fire situation in the target area. By adopting the scheme of the invention, confidence early warning of fire-fighting fire diffusion can be realized in a complex fire scene.