36 results about "Black smoke" patented technology

The application discloses an air intake flow control method and device, electronic equipment and a storage medium. The method comprises the following steps: monitoring the air flow in real time through an air flow sensor and monitoring the pressure difference before and after the filter screen in real time through a pressure difference sensor; determining the pressure difference threshold corresponding to the current air flow based on a preset first corresponding relationship between the air flow and the pressure difference threshold; when the current pressure difference corresponding to the current air flow is less than or equal to the pressure difference threshold, determining the first flow compensation value corresponding to the current pressure difference based on a preset second corresponding relationship between the pressure difference and the flow compensation value, and compensating the current air flow based on the first flow compensation value. Thus, when there is foreign matter in the filter screen in the existing steady flow pipe, the pressure difference changes greatly, the measured air intake flow is less accurate, and the problems of black smoke and insufficient power of the vehicle are caused.

1. The name of the design product: oil smoke purification equipment (black smoke smoked fruit oven tar smoke BDGS-16-2.2K). 2. The use of the design product: the design product is suitable for tail gas treatment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model belongs to the technical field of garbage treatment, and particularly relates to garbage drying equipment for a garbage incineration power plant, a compression assembly and a drying assembly are matched, when garbage is dried, the garbage can be firstly compressed, after water in the garbage is discharged, a closed space is directly formed, and hot air is input; therefore, the garbage can be dried, the garbage can be more suitable for follow-up garbage incineration, and black smoke generated during combustion is reduced. And by arranging the adjusting assembly, drying of the garbage can be further improved, and the situation that due to the fact that the density of the compressed and drained garbage is too large, hot air cannot effectively flow for drying is avoided.

A method for preventing overspeeding and black smoke emission from a four-stroke marine engine under all operating conditions is disclosed, relating to the field of four-stroke marine engine control technology. This method addresses the problem of existing technologies failing to achieve full-condition fuel quantity limitation and exhibiting low control precision, leading to black smoke emission from the engine. The method involves collecting a 4-20mA current signal corresponding to the boost air pressure as the main engine load feedback signal; connecting this signal to the electronic speed controller via a shielded anti-interference link; setting fuel quantity limitation parameters according to eight speed ranges and at least eight load points in each range within a speed range of 200-1080 r / min and a boost air pressure range of 10-200 kPa, and periodically calibrating these parameters; dynamically adjusting the fuel supply using a PID control algorithm to predictively prevent speed deviations; and incorporating an abnormal alarm and a local + cloud encrypted storage module. The beneficial effects are: ensuring the engine speed remains stable within a safe range and avoiding black smoke emission caused by excessive fuel quantity under different operating conditions.

The utility model discloses a kind of gasification firewood stove, the gasification firewood stove includes stove body with stove door, chimney, ash receiving box, fire ring and grate;Stove body is provided with hearth and ash hole inside;Chimney is arranged on the side wall of stove body and is communicated with hearth;Ash receiving box is inserted in ash hole and is located below grate;Fire ring includes inner fire ring and outer fire ring;Inner fire ring and outer fire ring are spaced apart and side edge sealing connection are set;Inner fire ring is set above grate, and a plurality of air holes are set on the upper portion side wall of inner fire ring;The interval space of inner fire ring and outer fire ring is communicated with ash hole;The utility model gasification firewood stove is set air hole on the upper surface of inner fire ring, high-temperature flue gas enters between inner fire ring and outer fire ring from air hole, and secondary combustion is carried out with oxygen inside, realize the full combustion of fuel and reduce the emission of black smoke, improve thermal efficiency and reduce flue gas emission, to achieve the effect of energy saving and emission reduction.

The application provides a double-cross limiting amplitude combustion proportion control method. The system obtains an air flow setting value SPoutair=MAX[SPgas, PVgas]*R according to cross limiting amplitude calculation; the system obtains a gas flow setting value SPoutgas=MIN[PVair / R, SPgas] according to cross limiting amplitude calculation; the system also introduces oxygen concentration control analysis, calculates an air-fuel ratio R according to an oxygen concentration setting value SPo2 and an oxygen concentration actual value PVo2, and replaces the initial setting value of the air-fuel ratio R. When the gas demand changes sharply, the gas and air can be ensured to rise / drop proportionally from the current stable flow, and the air amount is always slightly more than the gas amount, so that the combustion is ensured to be sufficient. When the air amount is insufficient, the gas amount can be ensured to be not excessive, so that the insufficient combustion to produce black smoke is avoided. When the gas amount is insufficient, the air amount can be ensured to be not excessive, so that the excessive air is avoided to enter and cause energy waste.

The invention discloses a fire smoke concentration calculation method and system and a fire detector, and belongs to the technical field of fire detection. Firstly, to-be-detected fire smoke is classified, and the influence of interference smoke on fire smoke physical parameter prediction is eliminated; after the influence of interference smoke is eliminated, the physical parameters of black smoke and white smoke are different, and a corresponding pre-trained multi-parameter regression model is adopted to predict the physical parameters, so that the particle shape parameters and particle size distribution of the to-be-detected fire smoke can be accurately obtained; and the fire smoke concentration of the to-be-measured smoke can be accurately calculated. The method breaks away from a traditional fire smoke concentration calculation method, a finer concentration calculation mode is provided, and the calculation accuracy of the fire smoke concentration is improved.

The utility model discloses an active air supply type ground torch system which comprises a combustion device and an external automatic blower device. The combustion device comprises a combustion chamber and a flare gas pipeline communicated with the combustion chamber, and a plurality of combustors are arranged in the combustion chamber; the automatic blower device comprises an air blower and a ventilation pipe, and the ventilation pipe comprises an air inlet channel connected with the air blower and an air outlet channel formed by extending into the combustion chamber; the air outlet channel is provided with an air outlet, and air enters through the air inlet channel and is introduced into the combustion chamber through the air outlet. The mode that air is actively supplied to the center of the combustion chamber is adopted, so that air is easily obtained in the center of the combustion chamber, flare gas is fully combusted, the defect of insufficient combustion caused by insufficient oxygen in the center of the combustion chamber during combustion of a traditional ground flare is effectively overcome, the combustion efficiency is improved, and the problems of black smoke emission, flash explosion and the like caused by insufficient combustion are solved. And the mode of blowing air into the combustion chamber is adopted, so that the distance between the combustors is reduced, and the occupied area is reduced.

The application provides a ship black smoke event monitoring method and system. The method comprises the following steps: acquiring a ship video stream, performing normal interval identification on the ship video stream at a first time interval based on a black smoke identification algorithm; in response to identifying a black smoke frame, recording a current first time, and performing interval encryption identification on the video stream at a second time interval based on the black smoke identification algorithm; in response to the continuous duration of the interval encryption identification no longer identifying the black smoke frame satisfying a third time interval, recording a current second time; and determining whether to generate black smoke event alarm information based on the ship video stream from the first time to the second time, and outputting the result. The method provided by the application enhances the reliability and monitoring effect of ship black smoke monitoring.

The utility model provides an obstacle removing device for an overhead transmission line of a wind power plant. The wind power plant overhead transmission line obstacle removing device comprises a supporting piece, a shielding assembly and a cleaning assembly, the shielding assembly comprises a first shielding piece, the first shielding piece is fixedly connected with the surface of one side wall of the supporting piece through a connecting block, a second shielding piece is arranged on one side of the first shielding piece, and the second shielding piece is fixedly connected with the surface of one side wall of the supporting piece. Through grooves are formed in the surfaces of the sides, close to each other, of the first shielding piece and the second shielding piece, the two through grooves are matched, and lug plates are fixedly connected to the surfaces of the side walls, facing the supporting piece, of the first shielding piece and the second shielding piece in a vertically symmetrical mode; the obstacle clearing device for the overhead transmission line of the wind power plant has the advantages that flames of a flame projector and black smoke generated by combustion can be prevented from polluting the whole equipment, and meanwhile, the burnt high-voltage line part can be cleared more carefully.

The invention discloses a complex scene-oriented ship black smoke detection method and system, and the method comprises the steps: constructing a ship black smoke data set containing different weather conditions, and carrying out the image enhancement preprocessing through an adaptive histogram equalization method; on the basis of a YOLOv5s model, a detection head of the YOLOv5s model is replaced by a dynamic detection head comprising a scale perception attention module, a space perception attention module and a task perception attention module, a cross-dimension feature fusion module is added in a Neck network, and a loss function is replaced by an MPDIOU loss function based on the minimum point pitch intersection-to-union ratio; and training and evaluating the improved model by using the preprocessed data set. According to the method, the detection precision and robustness of the model on the ship black smoke in complex weather and multi-scale scenes are effectively improved, the recognition capability on small targets and diffusion form black smoke is enhanced, and reliable technical support is provided for ship emission monitoring.

The utility model discloses equipment of a dual heating system additionally arranged at a furnace temperature, which comprises a coal gas main pipe, a first branch pipe, a second branch pipe, a first coal gas exchange valve, a supply pipe and a condenser pipe, and the first branch pipe with a communicated structure is welded on the rear side of the lower end of the coal gas main pipe; a second branch pipe of a communicating structure is welded to the right side of the lower end of the gas main pipe, and the first branch pipe and the second branch pipe are of an up-down staggered structure. The two branch pipes are arranged at the lower end of the main gas pipe, and the gas exchange valves are arranged on the branch pipes, so that a dual heating effect is formed, the heating temperature is improved, the phenomenon that the carbonization chamber collapses due to too low temperature is avoided, the phenomena of coke collapse, black smoke and the like are reduced after the temperature is improved, and the service life of the carbonization chamber is prolonged. The lower end of the coal gas main pipe is provided with the water drainage pipe which is of a communicating structure, the water drainage pipe flows into the condensation pipe, and the flow dividing pipes are installed at the bottoms of the two branch pipes, so that the problem that coal gas contains water is solved.

The utility model discloses a general type external filtering and purifying system for engine tail gas. The general type external filtering and purifying system comprises a mixing box, a cooling box, a filtering module, a heating pipe, a fan, a bypass pipe and a control system. The device is high in purification efficiency, convenient to use and maintain, small in size, low in power consumption, high in universality, and capable of effectively purifying harmful carcinogenic tail gas containing black smoke particles generated when diesel engines and gasoline engine equipment operate in a closed environment, especially in the plateau environment with thin oxygen content and low temperature throughout the year. High-concentration harmful tail gas can be effectively purified, and the harm of the tail gas to the body health of maintenance workers in a workshop is eliminated; the device is suitable for maintenance workshops, rear warehouses and other space closed places, is suitable for equipment with the displacement smaller than 15 liters or the power smaller than 350 Kw, and can reduce tail gas emission and prevent a target from being exposed when the equipment is arranged in an array fixed fortification.

The utility model relates to the technical field of carbonization furnaces, and discloses a gas-carbon co-production device of agricultural and forestry wastes, which comprises a heating cabin, a carbonization cabin is fixedly connected in the heating cabin, one side of the carbonization cabin is movably connected with a cabin door, and the carbonization cabin is fixedly connected with a first exhaust pipe and extends to the upper part of the heating cabin. A water seal tank is fixedly connected to the position, close to the first exhaust pipe, of the heating bin, one end of the first exhaust pipe is connected with the input end of the water seal tank through a pipeline, and a centrifugal tar filter is arranged on one side of the heating bin and further comprises a filter cartridge. Combustible gas generated in the carbonization process enters the centrifugal tar filter after being subjected to preliminary tar removal through the water seal tank, the motor drives the separation tank to rotate, the combustible gas is pushed to the activated carbon plate through centrifugal force, fine tar particles are adsorbed, the cleanliness of the combustible gas is greatly improved, the purified gas flows back to the combustion pipe to be combusted, pipeline blockage is avoided, and the combustion efficiency is improved. And combustion is more sufficient, black smoke peculiar smell is reduced, and the heat utilization rate is increased.

This invention discloses an automatic identification method and system for vessels emitting black smoke, aiming to solve the problem of rapid and accurate identification of such vessels. The method includes: recording initial parameters of a zoomable camera and acquiring channel video; capturing black smoke events using a multi-feature fusion black smoke detection algorithm; adjusting the camera via PID control and recording the vessel's 30-second navigation trajectory and heading; and filtering and matching identity information based on an "AIS + hull coding" dual-modal system, combined with vessel quantity and heading, supplemented by trajectory similarity and size error constraints to improve accuracy. The system includes modules such as a zoomable camera, an AI computing power unit, and a controller, integrating black smoke detection, trajectory tracking, identity matching, and data uploading. This invention achieves automatic identification of vessels emitting black smoke with strong real-time performance and high accuracy, enabling rapid evidence collection and providing technical support for channel vessel supervision.

The utility model provides an elevated torch air smoke abatement torch head, and relates to the technical field of torch heads, a separation cylinder is an annular cylinder with an upper opening and a lower opening, the top end of a settable air inlet pipeline is sleeved in the separation cylinder, and a gas mixing space is reserved above the settable air inlet pipeline in the separation cylinder. Through the arrangement of the separation cylinder, the gas entering the pipeline is primarily premixed with the air entering the channel inside the separation cylinder, the premixed gas and the air in the channel between the separation cylinder and the housing are secondarily mixed at the top of the separation cylinder, and the air is added into the gas for several times; air can be fully mixed in the set-off air, the air is uniformly distributed in the set-off air, and the air is easily and completely combusted during combustion, so that the incomplete combustion phenomenon caused by insufficient oxygen is reduced, the generation of black smoke is reduced, the black smoke emission can be radically reduced, the condition of using steam is omitted, and high efficiency and energy conservation are realized.

This application relates to a smoke suppression and cooling device, specifically in the field of power generation equipment for civil defense fortifications. It includes a support frame and at least two air ducts mounted on the frame. Each air duct is connected to the exhaust pipe of a diesel generator. Each air duct contains a particulate trap, with mounting rings fitted at both ends. Each air duct contains two retaining rings, each connected to the air duct by a support spring. The support spring pushes the two retaining rings closer together, allowing the particulate trap to be inserted between the two retaining rings. The mounting rings are inserted into and abut against the retaining rings. This application effectively removes black smoke from exhaust gases, improving the concealment of civil defense fortifications during wartime.

The utility model provides a generator set black smoke purification device which comprises a main box body and a flow guide box arranged at the upper end of the main box body, the interior of the main box body is divided into an air inlet chamber and an air outlet chamber through a partition plate, one side of the flow guide box is communicated with the air outlet chamber through a first pipeline, and the other side of the flow guide box is connected with the air inlet chamber through a second pipeline. And a bypass valve for controlling connection and disconnection is arranged on the second pipeline. The first ring body and the second ring body are connected with the filter element, the filter element is positioned through the conical surface, and the sealing performance is improved through taper fit. And the spring pushes the elastic plate to rise so as to extrude and clamp the filter element. The clamping mechanism is used for controlling the elastic plate to descend, the pressing plate presses the roller downwards to drive the elastic plate to descend, and the limiting piece is used for fixing the pressing rod, so that workers can disassemble and assemble the filter element conveniently. The device is easy to operate, the filter element can be disassembled and assembled more quickly, and the working efficiency is improved.

The invention provides a ship black smoke event monitoring method and system. The method comprises the following steps: acquiring a ship video stream, and performing interval-by-interval normal state identification on the ship video stream at a first time interval based on a black smoke identification algorithm; in response to the identified black smoke frame, recording a current first moment, and carrying out interval-by-interval encryption identification on the video stream at a second time interval based on the black smoke identification algorithm; recording a current second moment in response to the condition that the continuous duration of the black smoke frame is not identified by the interval-by-interval encryption identification to meet a third time interval; and judging whether black smoke event alarm information is generated or not based on the ship video stream from the first moment to the second moment, and outputting a result. According to the method provided by the invention, the reliability and the monitoring effect of ship black smoke monitoring are enhanced.

This utility model provides a device for controlling black smoke during marine diesel engine testing. Its features include: a housing comprising a lower silencing chamber and an upper filter chamber, which are connected; an air inlet is located on one side of the silencing chamber; multiple metal filter elements are distributed within the filter chamber, with the axial direction of the filter elements being vertical; air enters from the sides of the metal filter elements and exits from the top; an air outlet is located at the top of the filter chamber; and a pulse jet system is located above the housing and connected to the filter chamber. This utility model's device for controlling black smoke during marine diesel engine testing overcomes the problems of existing devices, such as complex structure, difficulty in cleaning filter materials, high noise levels, and difficult maintenance.

The utility model discloses DPF (diesel particulate filter) black smoke particle filtering equipment, which belongs to the technical field of DPF black smoke particle filtering, and adopts the technical scheme that the DPF black smoke particle filtering equipment comprises an equipment body, a heating mechanism is arranged on the surface of the equipment body, a filtering mechanism and an exhaust pipe are arranged on the front side of the equipment body, and a protective frame is arranged on the surface of the exhaust pipe; the filtering mechanism comprises a connecting frame, a fixing frame, a connecting sleeve, a rubber sleeve, a sealing block, a cyclone separator and a sealing groove, and the problems that when tail gas is filtered through existing DPF black smoke particle filtering equipment, large particulate matter in the tail gas enters the DPF black smoke particle filtering equipment, the filtering load of the DPF black smoke particle filtering equipment is likely to be increased, and the filtering efficiency of the DPF black smoke particle filtering equipment is affected are solved. The problems that in the DPF regeneration process, a large amount of fuel oil is needed for combusting diesel particulate matter, fuel oil economical efficiency is reduced, the regeneration period is prolonged, and the overall filtering efficiency of the DPF can be reduced are solved.

The invention discloses a diesel vehicle emission smoke intensity grade identification method based on an improved OTSU algorithm, and the method comprises the following steps: collecting a diesel vehicle tail gas black smoke image, carrying out the graying processing of the image, and carrying out the denoising processing of the gray image through Gaussian filtering; traversing a [0, 255] gray interval based on an improved OTSU algorithm, determining double thresholds by maximizing between-class variance, and segmenting the image into a heavy-level black smoke region, a light-level black smoke region and a background region; establishing a weight calibration mechanism, fitting the blackness values of the heavy-grade black smoke area and the light-grade black smoke area by adopting a least square method to obtain a weight calibration coefficient, and carrying out weighted calculation to obtain a blackness value; and comparing the blackness value with a Ringelmann blackness grade standard, and determining the smoke intensity grade.

The invention discloses a novel water-based integrated fuel, and relates to the technical field of liquid fuels. The water-based fuel reaches an oil-in-water state by adding a water-oil solvation agent and high-shear emulsification dispersion, water and oil are mixed into a whole, and an additive for increasing the heat value is added, so that the water-based fuel reaches a relatively high heat value, thereby being capable of meeting the requirements of kitchens and boilers, and being more environment-friendly than environment-friendly oil and liquefied gas. Diesel oil and other fuels are safer and cleaner, and cost is saved. The closed-cup flash point of the product is more than 100, black smoke and residues are avoided after combustion, and the calorific value can be 7 thousand to 11 thousand calories. The product has a high flash point and is difficult to ignite by open fire, so that the product can be used only by matching with a special gas appliance. The method is also designed, produced and provided by the company. In the production process of the product, the feeding sequence of various substances must be strictly executed, the emulsifying and dispersing time must be timed and quantified, and the product can be produced until the product is transparent and not layered.

The application discloses a mute diesel generating set with tail gas treatment, and relates to the field of generators, which comprises a control system assembly, a chassis assembly, a hanging bracket assembly, a box body assembly, an exhaust system assembly and an internal engine generator water tank assembly, a tail gas treatment mechanism is connected in series in the exhaust system assembly, a dustproof mechanism is arranged on the tail gas treatment mechanism, and the tail gas treatment mechanism comprises a straight pipe part arranged in the exhaust system assembly. The black smoke purifier DPF is mainly used for capturing particles in tail gas to meet the requirement of the number of particles (PN) of emission, the black smoke purifier DPF control system is connected to the electrical control system of the unit, is used for realizing the starting synchronization function, and is matched with the exhaust system assembly for use, so that harmful substances in exhaust smoke can be treated, harmful substances in exhaust smoke can be treated, and the pollution to human body and the environment is reduced.

An adaptive wide-range adjustable low-emission internal combustion venting and ignition device and control strategy are disclosed, comprising an incineration tower, a main burner, an ignition / detector, a main gas flow path, an ignition gas flow path, an emergency venting flow path, an air barrier, an electric damper, a maintenance manhole, a movable base, an emission monitoring system, and an intelligent control system. The internal combustion venting and ignition device adopts a closed design, producing no open flame or black smoke during combustion; the separate design of the tower and base facilitates relocation and allows for shared use across different work locations; the main burner employs a double-layer low-NOx combustion design, which can adaptively adjust across a wide range according to the venting air volume; the burner nozzle is equipped with a low-NOx ejector nozzle, which promotes mixed combustion and achieves low-NOx and low-carbon emissions. This invention is suitable for the diverse needs of industries such as oil drilling, natural gas extraction, and chemical processing, and can completely solve the problems of existing surface flare technology, such as low processing capacity, difficulty in adapting to different working conditions, easy flame leakage from the tower, low combustion efficiency, environmental pollution, and disturbance to residents.

The invention discloses a fire smoke detector and a smoke detection method, equipment and medium thereof, and relates to the technical field of fire smoke particle recognized.The method comprises the steps that scattering characteristics of scattering signals are simulated, the optimal scattering angle is found, and then the position of the fire smoke detector is adjusted according to the optimal scattering angle; the large-angle scattering signal intensity is prevented from being submerged by the small-angle scattering signal intensity; and obtaining the power value of each light emitting source, and comparing and judging the power ratio and a typical aerosol standard curve to distinguish burning particles from non-burning particles and balance the response sensitivity of black smoke and white smoke.

The utility model discloses a bag-type dust collector for removing black smoke, which comprises a machine body, a connecting pipe is arranged below one side of the machine body, one end of the connecting pipe is communicated with a machine frame, one end of the machine frame is communicated with an air inlet pipe, and a cooling mechanism is fixed in the machine frame. By arranging the rack and the cooling mechanism, the cooling mechanism can be fixed in the rack, before black smoke enters the machine body, the black smoke firstly enters the rack, at the moment, an air inlet in the cooling mechanism is connected with an external air supply mechanism, and cooling air enters a flow dividing frame through the air inlet and is evenly guided into all flow guide pipes; the black smoke is in contact with the flow guide pipe in the flowing process so that cooling can be effectively carried out, used cooling gas is discharged through the gas outlet, the phenomenon that too many oily substances adhere to the surface of the filter bag due to high temperature can be avoided by cooling the black smoke, and therefore ash removal operation is reduced, abrasion of the filter bag is prevented from being aggravated, and the service life is prolonged.

The application relates to the technical field of generator sets, and discloses a generator set with a sound-damping and shock-absorbing function, which comprises a generator set body, a sound-damping and shock-absorbing mechanism arranged below the generator set body, and a purification mechanism arranged outside the generator set body. The sound-damping and shock-absorbing mechanism comprises a supporting plate, two groups of universal wheels fixedly connected to the bottom surface of the supporting plate, two groups of rubber shock absorbers and two hydraulic rods fixedly connected to the upper surface of the supporting plate, and the extension end of each hydraulic rod is in contact with the bottom surface of the generator set body. The generator set with the sound-damping and shock-absorbing function can adjust the height of the purification cylinder through the connecting relationship that the limiting blocks slide in the limiting grooves, and can rotate another purification cylinder above the exhaust pipe through the rotating connection relationship between the rotating shaft and the inner wall of the moving block, so that the black smoke can be purified when the filter element is replaced, and the problem that the device cannot purify and filter the black smoke when in use is avoided.

The application discloses an ascending pipe heat exchanger and a use method thereof, which comprises an outer cylinder, a heat-conducting material body, a coil pipe and an inner cylinder; the outer cylinder is concentrically arranged outside the inner cylinder, a heat-conducting space is arranged between the outer wall of the outer cylinder and the inner wall of the inner cylinder; the coil pipe is arranged in the heat-conducting space, and the heat-conducting material body is filled in the heat-conducting space; wherein the heat-conducting material body is a homogeneous mixture of metal heat-conducting powder and phase change material; the high heat-conducting performance of the metal heat-conducting material is utilized, the gas production of the heat exchanger is effectively improved, the temperature of the raw coal gas is greatly reduced, and the phenomenon of graphite deposition is effectively prevented; meanwhile, the phase change characteristics of the phase change material are utilized, the temperature of the inner wall of the inner cylinder is ensured to be kept in a preset phase change temperature range in the whole coke oven production cycle, and the phenomenon of coke oil deposition at the end of coking is avoided; meanwhile, the phenomenon of black smoke emission when the water seal cover is opened before coke pushing can be avoided.

The utility model provides a particle trap which comprises a box body, the interior of the box body is divided into an air inlet cavity and an air outlet cavity through a partition plate, an air inlet pipe is installed on the outer side of the air inlet cavity, and an air outlet pipe is installed on the outer side of the air outlet cavity. A plurality of groups of filter element assemblies are detachably mounted on the box body, filter cartridges for filtering black smoke particles are arranged in the filter element assemblies, the filter cartridges are made of a DPF material so as to filter the black smoke particles, a guide sliding barrel spring and the filter cartridges are elastically mounted, a pressing plate is arranged in the guide sliding barrel, the pressing plate can seal the lower end of the guide sliding barrel, and an air guide pipe blows air into the filter cartridges. The pressing plate seals the upper end of the guide sliding cylinder, air leakage can be prevented, the dust discharging effect is improved, and the smoke particles are collected through the collecting hopper at the lower end of the box body. And the electric push rod on the sealing plate independently controls the pressing plate of one group of filter element components, so that the filter element components respectively perform back flushing, and back flushing can be performed under the condition of no shutdown, so that the service life of the filter element components is prolonged.