12883 results about "Smoke" patented technology

Electric heat for generating smoke from tobacco or the like in a hookah type smoking pipe. Electric heat is obtained from an electrically powered heating element which may be placed proximate the tobacco. The heating element may be contained within a housing which in turn may be placed above the smoking chamber of the hookah. The housing may have adjustably damped holes disposed to pass air over the heating element. Electrical circuitry serving the heating element may comprise a step down transformer and a voltage adjusting switch. The heating element may be integral with the hookah, may take the form of a separate component which is mountable over the smoking chamber of the hookah, or may comprise a free standing assembly which may be placed to stand adjacent to the hookah.

The invention provides an oil smoke real-time concentration monitoring and intelligent adjusting method and system, and relates to the technical field of intelligent control, and the method comprises the steps: collecting real-time air quality data of a catering area through a plurality of environment sensors, including oil smoke concentration, PM2.5 concentration, carbon monoxide concentration, temperature and humidity; and the control center calculates an oil smoke concentration spatial and temporal distribution field based on real-time data in combination with spatial interpolation, considers smoke exhaust energy consumption, smoke exhaust efficiency and regional oil smoke concentration, and determines an optimal cooperative control strategy by utilizing a multi-target optimization algorithm, and the optimal cooperative control strategy comprises the fan rotating speed of each range hood, the smoke exhaust direction and the air supply parameters of the fresh air system. And the control center issues the control strategy to a range hood controller to adjust operating parameters of the range hood. Dynamic optimization control over the air quality of the catering area can be achieved, the oil smoke concentration is reduced, energy is saved, and the smoke exhaust efficiency is improved.

The invention relates to the technical field of fire safety monitoring, in particular to a firework identification system and method based on multi-modal fusion perception, and the core of the scheme is a visible light, multispectral and temperature three-modal framework: feature extraction optimization of each modal, improved YOLOv8s for visible light branches, dynamic background modeling and flame color screening, and multi-modal fusion perception. False positive is rejected by a multispectral branch depending on a waveband ratio and an index, an error compensation algorithm is introduced into a thermopile branch, and finally, a final smoke and fire area and the confidence coefficient thereof are determined by associating a three-mode area through collaborative decision. According to the scheme, the complex environment adaptability and the recognition reliability can be improved, the false alarm risk is reduced, the extremely-early smoke and fire detection capability is enhanced, good real-time performance and deployment flexibility are achieved, and the method is suitable for various types of fire safety monitoring scenes.

The invention discloses a tunnel fire position positioning and fire source risk analysis method and system, and relates to the technical field of tunnel fire detection, and the method comprises the steps: periodically collecting image, temperature, smoke, harmful gas concentration, infrared radiation and humidity data at each monitoring point in a tunnel, and dynamically adjusting the monitoring frequency according to the humidity; feature extraction is performed on the collected data, a factor set and a fuzzy evaluation set for fire judgment are constructed, and a fuzzy algorithm is utilized to calculate the membership degree of each feature to fire evaluation; a comprehensive membership value vector is generated in combination with the feature weight and is used for judging whether a fire occurs or not and performing preliminary positioning; initial monitoring equipment and front and back adjacent equipment are set, and the fire position is further accurate through fuzzy analysis of data of the front and back adjacent equipment; performing risk assessment on the fire according to the fire position and the abnormal pixel point proportion; intelligent detection, precise positioning and risk analysis of the tunnel fire are realized, and the tunnel safety management level is effectively improved.

The present invention relates to the technical field of waste heat recovery equipment, and specifically discloses a waste heat recovery device for flue gas in a thermal power plant. It includes a box body with an upper smoke chamber, a heat exchange chamber and a lower smoke chamber inside. A number of smoke pipes connecting the upper smoke chamber and the lower smoke chamber are fixed in the heat exchange chamber; above the smoke pipes, there is a piston cylinder fixed by the box body; the upper end of the piston cylinder is connected to a high-pressure gas supply pipe, and a piston is arranged inside. The piston is connected with a scraping head through a push rod; side holes are provided on the push rod; when the high-pressure gas drives the piston to move downward, the scraping head moves along the inner wall of the smoke pipe to scrape off the ash slag. The waste heat recovery device for flue gas in this thermal power plant has a cleaning function and a better cleaning effect, high heat exchange efficiency and good waste heat recovery effect. The waste heat recovery device for flue gas in this thermal power plant can be automatically cleaned without disassembling components, is fast and efficient, and can be operated online. The ash slag scraped off during the cleaning process can be centrally recovered, avoiding re-mixing into the flue gas again, reducing the workload in the flue gas dust treatment link, and saving the subsequent environmental protection treatment cost.

The invention discloses a tunnel fire air curtain smoke prevention control method and system, and relates to the technical field of intelligent fire fighting, and the method comprises the steps: building a digital twinborn prediction model, and generating a fire source position coordinate and a smoke diffusion trend prediction map through multi-physics field coupling simulation; analyzing the stability requirement of the air curtain jet flow through a Brapare-Prandtt boundary layer analysis algorithm, and generating a jet flow enhancement requirement parameter table in combination with temperature gradient correction; optimizing an acoustic vortex main frequency band by adopting a Slodhaar number, and generating an acoustic vortex control parameter set in combination with a matched sound pressure level and a configured resonator phase difference; and converting the acoustic vortex control parameter set into an execution instruction, monitoring the jet velocity, the vortex street stability and the smoke retardation effect in real time, and dynamically correcting the parameters of the digital twinborn prediction model. According to the method, physical quantity outline matching of the blocking intensity and the sound pressure level is achieved through the sound intensity-momentum equivalent method, and the optimal phase configuration is determined in combination with POD modal analysis.

The invention discloses an automatic control method and system for a variable-frequency range hood, and belongs to the technical field of intelligent control of household appliances, and the method comprises the following steps: collecting oil smoke concentration data, temperature data and airflow disturbance data in a kitchen environment in real time by using a non-contact multi-mode sensor; constructing a multivariable fusion model, and generating a comprehensive environment state vector through feature extraction and weight distribution; an LSTM prediction model is constructed to abstract the current lampblack distribution state and surrounding environment characteristics, and an optimal fan rotating speed control strategy is generated in combination with an air volume-energy consumption-noise multi-target optimization model and a genetic algorithm; and the fan rotating speed is adjusted in real time according to the optimal fan rotating speed control strategy. The non-contact multi-mode sensor is used for collecting oil smoke concentration, temperature and airflow disturbance data in the kitchen environment in real time, the multivariable fusion algorithm and the time sequence prediction model are operated in combination with the edge calculation chip, and efficient, energy-saving and low-noise air volume control is achieved.

A range hood includes a box assembly and a fan frame installed on the top of the box assembly, a fan is installed inside the fan frame, a smoke inlet is provided at the bottom of the box assembly, the lower part of the fan extends into the box assembly, the fan is a centrifugal fan having a front air inlet and a rear air inlet, and correspondingly, a front air inlet channel and a rear air inlet channel are formed inside the box assembly, the smoke inlet is fluidly connected with the front air inlet through the front air inlet channel, and the smoke inlet is fluidly connected with the rear air inlet through the rear air inlet channel. The lower part of the fan of the range hood extends into the box assembly, and the fan adopts a front and rear double air inlet structure. After the fan suction port is placed downward, the suction port is closer to the smoke inlet, which is conducive to improving the oil fume extraction effect. Therefore, the oil fume extraction effect can be guaranteed by adopting a thin fan system, thereby reducing the thickness of the entire box, making the product a thin range hood in appearance, which can reduce the risk of users hitting their heads and reduce the sense of aggression during use.

A fire monitoring and early warning system belongs to the field of fire fighting and comprises a pollution-resistant sensor, a central control system, a data filtering and processing module, a real-time monitoring platform, an intelligent alarm module and an environment monitoring module. The data filtering and processing module uses a machine learning model to identify and eliminate abnormal data, and filters out false signals caused by dust; the real-time monitoring platform transmits data of the pollution-resistant sensor to the central control system through a wireless network; the intelligent alarm module is provided with a threshold value and an alarm mechanism, and when the temperature or the smoke concentration exceeds a normal range, the intelligent alarm module automatically gives an alarm and notifies related personnel; and the environment monitoring module is used for monitoring the temperature, humidity and dust concentration of the factory environment so as to adjust an early warning threshold value in real time. According to the comprehensive fire monitoring and early warning system provided by the scheme, abnormal signal identification and dynamic threshold adjustment are carried out by combining various environmental monitoring data and utilizing a machine learning model.

The invention relates to the field of kitchen household appliances, and provides an air curtain device and a range hood, the air curtain device comprises an air curtain fan comprising a first air inlet and a first air outlet, an air curtain duct comprising a second air inlet and a second air outlet, the second air inlet is connected with the first air outlet, and the first air outlet is connected with the second air outlet; the first air inlet and the second air outlet are communicated with the outside of the range hood, and the second air outlet faces a smoke suction hole of a smoke collection plate of the range hood; the air curtain duct comprises an upper cover plate and a lower cover plate, a first included angle between a first arc tangent line, at the second air outlet, of the upper cover plate and the horizontal direction is 0-70 degrees, and a second included angle between a second arc tangent line, at the second air outlet, of the lower cover plate and the horizontal direction is 0-45 degrees. The air curtain device can enable rising and to-be-leaked oil smoke to be carried to the smoke suction hole by the air curtain airflow in time so as to be sucked away and discharged by the range hood, so that oil smoke leakage can be avoided, and meanwhile, the air curtain airflow can be further ensured to be blown to the smoke suction hole by setting the angle of the air outlet of the air curtain device.

The invention discloses an intelligent building fire monitoring method, and relates to the field of building fire monitoring, and the method comprises the steps: collecting three types of fire characterization parameters: temperature, smoke concentration and carbon monoxide concentration; the method comprises the following steps: acquiring fire characterization parameters of each node at an initial frequency, comparing the fire characterization parameters to trigger primary warning, then increasing the acquisition frequency for a primary warning node and adjacent nodes, and continuously acquiring multiple groups of data; fire source initial coordinates are determined through positioning anchor points and parameter gradient differences, the coordinate range is continuously corrected, and specific fire source position coordinates are provided; and dynamically generating a fire diffusion path according to the smoke diffusion path of the monitoring node in the fire source coordinate range, tracking the fire diffusion path and providing diffusion direction prediction. The accuracy and timeliness of intelligent building fire monitoring are improved, the quick response to fire dangerous cases is facilitated, and the safety of buildings and personnel is guaranteed.

The invention discloses a detection method and system for a flue gas analyzer, and the method comprises the steps: carrying out the spectrum scanning of flue gas through a multispectral detector according to the spectral characteristics of the flue gas, and obtaining the reflection and transmission spectrum data of the flue gas in a plurality of wavelength ranges; establishing an abnormal value detection model by using an ensemble learning algorithm according to the spectral data so as to process the spectral data; analyzing the processed spectral data in real time, and identifying smoke components and concentration data thereof; a dynamic adaptability correction model is constructed according to real environment conditions, historical flue gas components and concentration data of the historical flue gas components so as to correct the concentration data of the identified flue gas components in real time, and the working state of the multispectral detector is adjusted through a feedback control unit; and monitoring data of a related environment where the flue gas is located, and integrating the corrected flue gas component and concentration data and the related environment data by using a data fusion algorithm to generate a flue gas analysis report. By utilizing the embodiment of the invention, the flue gas components can be monitored in real time, the defects of a traditional analysis instrument in the aspects of data processing and correction are overcome, and the accuracy and reliability of flue gas analysis are improved.

The invention relates to the technical field of flue gas purification treatment, and discloses flue gas treatment-based flying solid particle capturing and separating equipment, which comprises a shell, a fixed shaft is coaxially arranged in the shell, an air duct structure in a spiral path shape is fixedly connected to the fixed shaft, a spiral air groove is formed in the inner wall of the shell, and the spiral air groove is communicated with the fixed shaft. An annular gap is formed between the spiral air groove and the air duct structure, a filter screen is rotatably arranged in the gap, a cleaning bin is arranged on the outer side of the filter shell, a winding shaft is rotatably arranged in the cleaning bin, and a cleaning assembly is laid on the surface of the winding shaft; according to the equipment, the flowing direction of smoke is changed through the spiral design of the air duct structure, the smoke is pushed to the filter screen through centrifugal force, particles in the smoke are gradually adsorbed by the filter screen, and after the smoke enters the spiral air duct, the flowing speed of the smoke is increased due to the fact that the channel is small and is not blocked by the filter screen; and the generated pressure difference and spiral force improve the passing rate of the filter screen and the overall filtering efficiency.

The invention, which relates to the technical field of fire safety, discloses a variable-angle solar panel heating test system comprising a sample loading and observation mechanism, a fire performance analysis mechanism and a radiation heating mechanism. The sample loading and observing mechanism is used for fixing samples with different sizes, adjusting the height and angle of the samples and observing and measuring sample data; the fire hazard performance analysis mechanism is located above the sample loading and observation mechanism and is used for collecting and analyzing smoke and mass loss generated by the heated sample and outputting fire hazard key parameters; the radiation heating mechanism is positioned in front of the sample loading and observing mechanism and is used for providing a real-time heat source for the sample. The device can test the change of the fire performance of the sample under the action of uniform and non-uniform external heat sources in real time, can conveniently switch the heating angle, the heating area, the size and the thickness of the sample, synchronously observes the crack diffusion process, and has the advantages of simple structure, convenience in operation and the like.

The invention relates to the technical field of tobacco leaf curing modulation, and discloses a rainy weather tobacco leaf curing temperature and humidity control method and system.The rainy weather tobacco leaf curing temperature and humidity control method comprises the following steps that temperature and humidity data of multiple positions in a tobacco loading chamber of a bulk curing barn are collected and analyzed in real time based on a temperature and humidity sensor; the influence of rainy weather on humiture fluctuation in a tobacco loading chamber of the bulk curing barn is evaluated, the change trend of humiture is identified, and humiture monitoring data is generated; by collecting and analyzing temperature and humidity data of multiple positions in the tobacco loading chamber of the bulk curing barn in real time, the actual influence of air temperature and humidity in rainy weather on the curing environment is evaluated, power input and response of curing heat supply equipment are analyzed and adjusted, the stability and reliability of the curing process under the severe weather condition are ensured, and the curing efficiency is improved. The infrared spectrum sensor is used for monitoring changes of various compounds in the tobacco leaf curing process in real time, curing parameters are adjusted, and the tobacco leaf bulk curing quality is improved.

The invention discloses a passive self-sensing active fire prevention method and system based on perfluorohexone microencapsulation, and relates to the technical field of fire safety, and the method comprises the steps: configuring a multi-element sensor to collect environment data; environment data preprocessing and feature extraction are carried out; an intelligent fire recognition algorithm is constructed, and corresponding grading strategies are formulated to regulate and control microcapsule fire extinguishing operation; the release of the microcapsules is intelligently regulated and controlled, and dynamic dosage control and self-adaptive microcapsule distribution optimization are carried out. According to the method, environmental parameters such as temperature, smoke, pressure and humidity are collected in real time by configuring a multi-element sensor, and dynamic analysis and grading response of fire risks are carried out in combination with an intelligent algorithm, so that intelligent regulation and control, dynamic dose control and self-adaptive distribution optimization of microcapsule release are realized; a multi-element sensor layout with precise monitoring and comprehensive coverage; efficient data preprocessing and feature extraction are achieved, and dynamic fire extinguishing agent release control and distribution optimization are completed based on an intelligent fire recognition algorithm of machine learning.

The invention provides an industrial smoke monitoring method and system capable of predicting the service life of a filter bag, and the method is characterized in that sensors are arranged at an air inlet and an air outlet of a bag type dust collector, and the sensors are used for collecting the smoke temperature, the smoke humidity, the smoke concentration and the air inlet amount of the air inlet and the smoke concentration of the air outlet in real time; calculating the real-time filtering efficiency and resistance of the filter bag based on the collected data, and establishing a mathematical model between the resistance of the filter bag and the service life of the filter bag; according to the mathematical model, predicting the service life of the filter bag by monitoring the resistance change of the filter bag, and determining the replacement time of the filter bag; the method can accurately calculate the real-time filtering efficiency and resistance of the filter bag, and realizes accurate prediction of the service life of the filter bag.

The utility model discloses a range hood, belongs to the technical field of household appliances, and is designed for solving the problems that oil stains condensed in an area below a panel are exposed after a smoke barrier of the existing range hood is closed, and the like. The utility model discloses a range hood which comprises a smoke collecting cavity assembly, a panel, a smoke baffle and a smoke inlet cavity, and the smoke baffle can open and close the smoke inlet cavity; after the smoke baffle is opened, a non-smoke-inlet area is formed between the smoke baffle and the panel, the range hood further comprises an oil baffle assembly, and the oil baffle assembly can at least partially prevent oil smoke from entering the non-smoke-inlet area. The range hood disclosed by the utility model comprises the oil baffle assembly, so that the amount of oil smoke entering a non-smoke-inlet area can be greatly reduced, oil dirt is prevented from being condensed in an area below the panel, the problem that the oil dirt condensed in the area below the panel is exposed after a smoke baffle of an existing range hood is closed is solved, and the cleanliness of the appearance of the range hood is improved.

The invention provides a cigarette smoke spicy note evaluation method and application thereof, the evaluation method comprises the following steps: (1) capturing main stream smoke total particulate matters of typical spicy and non-spicy cigarettes, carrying out GC-MS detection to obtain the content of aroma components, carrying out partial least square discriminant analysis on the content of the aroma components, and determining the content of the aroma components in the main stream smoke; the VIP value of the aroma component is obtained; (2) capturing main stream smoke total particulate matters of the to-be-detected cigarette, and performing GC-MS detection to obtain the content of aroma components in the to-be-detected cigarette; and (3) calculating the spicy note index Q according to the VIP value and the content of aroma components in the cigarette to be detected. According to the evaluation method provided by the invention, the spicy note of the cigarette smoke can be objectively and accurately reflected, the subjective error caused by sensory evaluation and the condition that the tobacco shred aroma component analysis result does not correspond to the actual smoking experience are avoided, and a new method is provided for characterization and evaluation of the spicy note of the cigarette smoke.

The invention relates to an exchange platform laser cutting device. The device comprises a rack, a climbing rail, a translation rail, a translation platform, a climbing platform, a driving mechanism, a three-dimensional moving mechanism and a laser cutting mechanism. The rack comprises a first area and a second area, a plurality of partition plates are arranged at the bottom of the rack corresponding to the first area to form a plurality of smoke exhaust sub-areas, a smoke exhaust port is formed in the rack corresponding to one side of each smoke exhaust sub-area, each smoke exhaust port is connected with a smoke exhaust pipe, a total air outlet is formed in the smoke exhaust pipe, and the total air outlet is communicated with the smoke exhaust sub-areas. An air door and an air door driving assembly used for driving the air door to be opened and closed are arranged at the smoke outlet. The running track of the climbing platform is that the climbing platform ascends and then descends, when the climbing platform and the translation platform are staggered, the climbing platform is located above the translation platform, the climbing platform does not occupy the bottom space of the rack, in this way, the bottom space of the first area of the rack can be released, and therefore a smoke exhaust mechanism can be arranged in the bottom space of the rack.

The invention relates to the technical field of fire monitoring and alarming, in particular to an intelligent household fire automatic alarming and escape guidance system, which comprises a time-sensitive escape window evaluation module, a time-sensitive escape window evaluation module, an escape window evaluation module and an escape guidance module, wherein the time-sensitive escape window evaluation module is based on fire source temperature, smoke concentration, humidity and oxygen content collected by a fire detection sensor network in combination with a fire source position; the severity of a current fire and the influence of the current fire on an escape window are evaluated in real time, and preliminary escape time early warning is provided; the fire spreading trend prediction module is used for predicting a fire spreading path based on fire detection sensor network data and a machine learning algorithm and generating a dynamic risk map; and the self-adaptive escape path optimization module is used for generating a plurality of escape paths with different priorities, optimizing the paths in real time according to the fire change, and ensuring that the escape paths are always in a low-risk area. According to the invention, it is ensured that family members can obtain timely alarm and action guidance in an escape time window, and the escape success rate is improved.

The embodiment of the invention discloses a range hood control method and device, electronic equipment and a storage medium, and the range hood control method comprises the steps that environment sound signals are collected; performing feature extraction on the environment sound signal to obtain a sound frequency feature of the environment sound signal; if the sound frequency characteristics meet the preset cooker starting sound characteristics, determining a target working mode; and starting based on the target working mode so as to execute corresponding smoke exhaust operation. Visibly, by automatically sensing starting of the cooker, the smoke exhaust function is responded and started in time, the situation that the range hood is not started in time due to human negligence, oil smoke diffusion and potential health risks are caused can be prevented, and the intelligent degree is improved.

The invention relates to a gas-water curtain partition type tunnel smoke control system and method, and belongs to the field of tunnel fire prevention and control, the gas-water curtain partition type tunnel smoke control system comprises a tunnel, smoke control partitions, a tunnel fire extinguishing system, a gas curtain generation system, a water curtain generation system and a fire detection alarm, the gas curtain generation system comprises a gas curtain generation tail end, and the water curtain generation system comprises a water curtain generation tail end. The tunnel is divided into a plurality of smoke control subareas by the air curtain generation tail end and / or the water curtain generation tail end. A plurality of air curtains and water curtains can be formed at the boundaries of the two sides of the smoke control subareas, at the moment, smoke generated by a fire source can be isolated into the smoke control subareas, the smoke can be continuously eliminated under the internal circulation purification effect of the tunnel fire extinguishing system, meanwhile, the tunnel fire extinguishing system can automatically restrain fire spreading, and therefore the smoke spreading path is thoroughly blocked.

The utility model provides a smoke inlet device and a range hood, and relates to the technical field of kitchen appliances, and the smoke inlet device comprises a smoke collecting hood and a flow distribution mechanism. A top smoke inlet, a side smoke inlet, a first smoke outlet and a second smoke outlet are formed in the smoke collecting hood, a first flow channel communicated with the top smoke inlet and the first smoke outlet and a second flow channel communicated with the side smoke inlet and the second smoke outlet are arranged in the smoke collecting hood, and the first flow channel and the second flow channel are relatively independent; the first smoke outlet and the second smoke outlet are both communicated with the fan assembly; the flow distribution mechanism is connected with the exhaust fume collecting hood and used for adjusting the opening degree of the first exhaust fume outlet and the opening degree of the second exhaust fume outlet so that the proportion of negative pressure distributed to the first exhaust fume outlet and the second exhaust fume outlet by the fan assembly can be adjusted.

The invention discloses a kitchen smoke exhaust space vector control and airflow organization collaborative optimization management method and system, and relates to the technical field of data processing. According to the method, kitchen space topology is constructed, multiple sensors are deployed to collect oil smoke concentration, temperature, wind speed and equipment operation data, and a structured environment tensor is generated through interpolation; solving a high-precision oil smoke motion vector field, generating a dynamic diffusion path, positioning an oil smoke core area, dynamically marking a personnel risk area, and synthesizing a thermal plume main path; an LSTM model is adopted to predict equipment load and fault probability, and a dynamic power consumption strategy is generated; constructing a multi-objective function of clearance rate, energy consumption and comfort, outputting a Pareto optimal solution set through a genetic algorithm, and dynamically selecting a control scheme according to working conditions; and finally, an instruction is converted into coordinated action of air exhaust and air supplement, energy consumption is reduced through PID real-time parameter adjustment and closed-loop correction, and meanwhile the effects of improving the oil smoke removal efficiency and accurately controlling the air speed of a personnel area within a comfortable range are achieved.

The invention discloses a blasting smoke dust prevention and control method and system for a large-section underground petroleum reserve cave depot, and relates to the technical field of blasting smoke dust prevention and control. The method comprises the steps that smoke dust parameter sensors are arranged in a plurality of preset monitoring areas between a charging trolley and a tunnel face in a blasting area; based on a smoke parameter sensor, smoke parameters of the multiple preset monitoring areas after blasting are obtained; on the basis of the smoke dust parameters, the time-air transportation rule of tunneling blasting dust and smoke in the blasting area is determined; and on the basis of a time-air transportation rule, determining an effective area and an injection path which need to be covered by mist spray for treating smoke dust. The technical problem that in the prior art, the dust falling efficiency is low is solved.

The utility model relates to the technical field of dust removal equipment, and discloses a slag removal device for a laser cutting platform, which comprises a rack and a serrated support table, the serrated support table is positioned in the rack, a collecting frame is arranged in the rack, chutes are formed in the inner walls of the two sides of the collecting frame, and the serrated support table is positioned in the rack. Driving mechanisms are arranged in the two sliding grooves correspondingly, and a brush is arranged in the collecting frame. According to the laser cutting platform, through the arrangement of the collecting box, the brush, the air blower, the filter screen and activated carbon, residues attached to the sawtooth-shaped supporting table can be conveniently cleaned, smoke dust generated when the laser cutting platform works can be conveniently adsorbed and filtered, the influence of the residues and the smoke dust on equipment is avoided, and the service life of the equipment is prolonged; and through the arrangement of a connecting rod and a driving mechanism, a brush and a collecting box are conveniently driven to move, residues attached to the sawtooth-shaped supporting table are cleaned, and smoke dust generated when the laser cutting platform works is adsorbed and filtered.

The present invention discloses a smoke damper movement mechanism, including a smoke damper and a movement mechanism, the movement mechanism including a driving mechanism and a transmission mechanism, the transmission mechanism including: a first hinge, as a driven arm, having a first end and a second end opposite to each other, the second end of the first hinge being rotatably connected to the smoke damper; a second hinge, as a driving arm driven by the driving mechanism, having a first end and a second end opposite to each other, the second end of the second hinge being rotatably connected to the smoke damper, the connection position between the first hinge and the smoke damper being located above the connection position between the second hinge and the smoke damper; a transmission rod, connected between the driving mechanism and the first end of the second hinge, transmitting the driving force of the driving mechanism to the second hinge; an auxiliary closing mechanism, arranged at the first end of the first hinge, at the extreme position of the movement of the smoke damper, the transmission rod applies downward pressure to the auxiliary closing mechanism, so that the first hinge tightens the smoke damper. Also disclosed is a range hood having the above-mentioned smoke damper movement mechanism applied thereto.

The invention discloses an efficient gradient utilization medium and low temperature flue gas waste heat recovery system and method, and relates to the technical field of waste heat recovery. When the contact time between the medium and low temperature flue gas and a heat medium is short and the heat conduction contact area is small, the heat transferred to the heat medium by the medium and low temperature flue gas is small, the waste heat recovery amount is small, and the recovery effect is affected. The arc-shaped recess in the center of the inner side of the heat medium bin is matched with the smoke exhaust mechanism, the contact area between the inner side of the heat medium bin and smoke is increased through the recess, the smoke exhaust mechanism limits smoke exhaust, the contact area between the smoke and the heat medium bin is increased, and meanwhile the contact time between the smoke and the heat medium bin is prolonged; the heat of medium and low temperature flue gas is more effectively transferred to the heat medium in the heat medium bin, and the situation that the flue gas and the heat medium bin are small in contact area and short in retention time, heat is not completely transferred and discharged, and the waste heat recycling rate is low is avoided.

The invention relates to the technical field of smoke treatment equipment, and provides coal-fired boiler smoke treatment equipment which comprises a shell, a smoke inlet pipe is arranged on one side of the shell, a smoke outlet is formed in the top of the shell, a spraying device is arranged in the shell, a heat conduction cylinder is arranged at the bottom in the shell, a smoke containing cavity is formed in the heat conduction cylinder, and a smoke outlet is formed in the smoke containing cavity. The smoke inlet pipe extends into the smoke containing cavity, the top of the smoke containing cavity is fixedly connected with a plurality of filter cartridges used for filtering particulate matter in smoke, one end of each filter cartridge extends out of the heat conduction barrel, and a plurality of filter holes are formed in the outer surface, at one end of the smoke containing cavity, of each filter cartridge. A plurality of air outlets are formed in the outer surfaces of the sides, away from the heat conduction cylinder, of the filter cylinders, and a cleaning device used for cleaning the outer surfaces of the filter cylinders is arranged in the smoke containing cavity. According to the technical scheme, a worker does not need to shut down when cleaning the filter screen, and the flue gas treatment efficiency is improved.