142 results about "Biomass combustion" patented technology

The invention discloses crushing equipment for waste biomass combustion heat supply, and relates to the technical field of waste biomass crushing. The shaking sieve mechanism, the cutting mechanism and the crushing roller mechanism are sequentially assembled on the rack from top to bottom in the waste material moving direction; the sieve shaking mechanism comprises a first support and a first box body fixed with the upper part of the first support; the stepped screening assembly is arranged in the first box body; and the eccentric vibration wheel assembly is arranged on the first box body. Impurity removal and separation, large-size shearing and crushing operation are sequentially conducted on waste, impurities are rapidly screened out, the purity of the waste is improved, and the large-size waste is pretreated, so that waste particles machined by the crushing roller mechanism can better meet the fine and uniform form required by the final purpose; therefore, stable control of subsequent procedures such as conveying, drying and granulation and unification of product quality are facilitated.

The present invention provides a mortar composition for seaweed bed creation that can significantly reduce the carbon dioxide emission intensity per unit of seaweed bed creation blocks. [Solution] A mortar composition for creating seaweed beds comprising a binder, fine aggregate, and an alkaline stimulant, wherein the binder comprises blast furnace slag fine powder, the fine aggregate comprises main ash of biomass combustion ash, and the alkaline stimulant comprises fly ash of biomass combustion ash.

The invention provides a fluidized bed combustion system and a combustion method. The fluidized bed combustion system comprises a fluidized bed combustion reaction device and a mild gasification reaction device, the fluidized bed combustion reaction device comprises a dilute-phase region arranged in the middle and a dense-phase region arranged at the lower part; a gas phase outlet of the mild gasification reaction device is connected with a gas phase inlet of the dilute phase zone, and a solid phase outlet of the mild gasification reaction device is connected with a solid phase inlet of the dense phase zone. The system is stable in combustion, high in denitration efficiency, compact in structure, easy and convenient to operate, low in operation cost and suitable for low-nitrogen transformation and new projects of coal and biomass combustion devices, and has good industrial application prospects and popularization value.

The invention relates to the technical field of biological energy, and particularly discloses a method for producing hydrogen by using a coal mine goaf, which comprises the following steps: mixing pretreated agricultural organic wastes with fermentation liquor and a culture solution containing a methane inhibitor, and conveying the mixture to the coal mine goaf through an injection well; utilizing natural ground temperature conditions in the goaf to enable microorganisms to perform co-fermentation on residual coal in the goaf and the injected agricultural organic waste to produce hydrogen; produced hydrogen is collected and output through a gas producing well, and fermentation residues are discharged through a material producing well. According to the hydrogen production method provided by the invention, the goaf is used as a natural reactor, and two wastes are synergistically converted, so that the hydrogen production cost and energy consumption are greatly reduced, meanwhile, environmental pollution is effectively avoided, and a new green way is provided for resource utilization of waste mines.

The invention provides a method for roasting-leaching clay type lithium ore by replacing a roasting aid with biomass, and belongs to the technical field of ore dressing processes. According to the method, the plant ash generated after biomass combustion is used for replacing part of alkali-containing salt or alkali in the clay type lithium ore so as to achieve the purpose of alkali roasting-water leaching, the sintering condition of a roasting auxiliary and the clay type ore can be effectively reduced through addition of the plant ash, and bulk consumption of solid waste of the plant ash is achieved. The invention provides a mixed roasting-water leaching method of plant ash generated after biomass combustion and clay type lithium ore, so that the consumption of a roasting auxiliary agent is greatly reduced (the consumption of an alkaline agent is reduced by 50-80%), the phenomenon that the roasting auxiliary agent and the clay type ore are easy to sinter at high temperature is improved, clean and effective utilization of biomass is realized, and the method is suitable for industrial production. The lithium obtained through the method is high in leaching rate and low in cost.

The utility model discloses a novel biomass combustion furnace deashing device, which relates to the technical field of combustion furnaces, and comprises a furnace body, a support frame is fixed on the inner wall of the furnace body, two groups of fire grates are mounted at the top of the support frame, the fire grates are semicircular, a mounting component for mounting the fire grates is arranged at the top of the support frame, and the mounting component is fixed on the inner wall of the furnace body. The utility model has the beneficial effects that when the cam rotates to a high position, the two groups of fire grates are driven to vibrate up and down, the fire grates are vibrated to clean ash through the repeated rotation of the cam, the fire grate structure is a trapezoidal structure gap with a small upper part and a large lower part, the effect of only falling ash without falling materials is achieved under the vibration effect, the air inlet of a hearth is facilitated, and the energy consumption is reduced. A good ash removal effect is achieved under the conditions that the cam keeps a reasonable stroke and an existing combustion layer is not damaged, the two fire grates are combined into a circle, the fire grates are of a two-piece structure, and the fire grates can be conveniently taken out from an access hole.

The utility model discloses a novel biomass combustion furnace chimney device, which relates to the technical field of combustion furnaces, and comprises a furnace body, the top of the furnace body is provided with a radiator for carrying out heat exchange on combustion flue gas, one side of the radiator is communicated with an air outlet pipe, the top of the air outlet pipe is provided with a chimney body, and the chimney body is communicated with the radiator. The chimney has the advantages that the inclined pipe is beneficial to stabilizing the airflow in the chimney, if a straight-barrel-shaped chimney is adopted, the situation that the pulling force of the chimney is not enough can be generated in the high-speed working process of a fan, the airflow in the chimney needs to be supplemented through the inclined pipe, and therefore the chimney is not prone to being damaged. Otherwise, the overall length of the chimney needs to be increased, the cost is increased, the air outlet space of the connecting pipe is blocked through movement of the baffle, and therefore the effect of adjusting the air quantity entering the chimney body is achieved, and the air speed is adjusted according to the feeding and combustion conditions in the hearth.

The utility model discloses a biomass combustion gas hot air boiler, the inner side of a rotating seat is embedded and rotatably connected with a rotating rod, the top end of the rotating rod is provided with a rotating blade, and the edge end of the rotating rod is fixedly connected with four linkage rods at equal angles at the bottom of the rotating blade; the bottom ends of the four linkage rods are connected with connecting rods at equal intervals, and the bottom ends of the connecting rods are fixedly connected with material turning shovel plates. Heat airflow generated in the combustion process is used for driving the rotating blades to rotate, and the rotating rods are synchronously driven to rotate; according to the biomass particle combustion device, the linkage rod, the connecting rod and the material turning shovel plate can be conveniently driven to rotate on the inner side of the combustion hearth, the material turning shovel plate moves along the top face of the leakage net, biomass particles accumulated in the combustion hearth can be conveniently turned through rotation of the material turning shovel plate, and therefore the biomass particles can be combusted more thoroughly, and the combustion effect is guaranteed.

The utility model discloses a system for preparing renewable natural gas by utilizing biomass, which comprises a biomass degradation system, a biomass combustion system, a biomass gasification system and a wind and light energy storage electrolysis system, the biomass degradation system comprises an anaerobic fermentation device, a purification device and a biogas storage tank I which are communicated in sequence, the biomass combustion system comprises a biomass boiler, a carbon dioxide trapping device, a methanation device I and a synthetic natural gas storage tank which are sequentially communicated, and the biomass gasification system comprises a gasification furnace, a methanation device II and a biogas storage tank II which are sequentially communicated. The wind and light energy storage electrolysis system comprises a wind power and photovoltaic power generation system and an electrolytic cell which are sequentially communicated. The biomass recycling system has the advantages that recycling treatment of different types of biomass is realized, and meanwhile, efficient development and utilization of biomass energy are also realized.

The invention relates to a device and a method for improving air permeability of a thick bed by utilizing biomass fuel. The device comprises a T-shaped frame and a cross rod, the T-shaped frames are arranged in a bilateral symmetry mode, and the horizontal ends of the T-shaped frames face downwards. The cross rod is correspondingly and fixedly connected between the upper portions of the vertical ends of the T-shaped frames on the two sides. The method comprises the following steps: S1, preparing hydrogen-rich biomass; s2, forming the biomass combustion rod; and S3, sintering application. According to the invention, biomass which is a renewable clean resource is reinforced and applied to the field of sintering production, so that carbon emission is effectively reduced, and dependence on carbon-containing fuel in the sintering process is reduced; and meanwhile, the matching device can effectively improve the material layer air permeability in the thick material layer sintering process, and the effects of increasing yield and reducing consumption are achieved.

This invention discloses a biomass combustion boiler for purifying waste gas, relating to the field of environmentally friendly combustion furnaces. It solves the problem of incomplete biomass combustion leading to excessive black smoke in the waste gas, affecting purification efficiency. The biomass combustion boiler for purifying waste gas includes a metal support frame, a waste gas purification tower, and a waste gas guide pipe. The purification boiler structure is installed at the top of the metal support frame. The purification boiler structure includes a combustion-supporting telescopic rod, a cover-opening telescopic rod, an inner cylinder, and an outer cylinder. The output end of the cover-opening telescopic rod is connected to a combustion chamber top cover, which pushes the combustion chamber top cover to flip, opening and closing the outer cylinder. The output end of the combustion-supporting telescopic rod is connected to a metal support plate, which pushes the metal support plate up and down to shake the inner cylinder. This invention designs a double boiler (inner and outer cylinders) that can reduce boiler temperature. Biomass fuel is placed in the inner cylinder for combustion, and is cooled by incoming air, extending the boiler's combustion time, resulting in more complete combustion and introducing more air.

The invention relates to the technical field of biomass combustion, and discloses a biomass quantitative feeding rotary stock bin which comprises an outer fixed bin cylinder and an inner fixed bin cylinder, the inner fixed bin cylinder is located in the outer fixed bin cylinder, and a discharging opening is formed in the bottom face of the outer fixed bin cylinder. A first material guide scraper and a second material guide scraper are arranged in the outer fixed silo, the first material guide scraper is fixed in the outer fixed silo, the second material guide scraper is movably arranged in the outer fixed silo, a feeding port is formed in the top of the inner fixed silo, and a notch is formed in the peripheral surface of the inner fixed silo. By means of the inner and outer double-cavity structure and the double functions of rotation of the material uniformizing base plate and the outer fixed material guiding scraper, biomass materials are effectively prevented from bridging and arching in the stock bin, meanwhile, the double-speed rotating base plate is matched with frequency conversion speed regulation, the inner cavity discharging speed and the outer cavity discharging amount are accurately controlled, continuous and stable feeding is achieved, and the working efficiency is improved. And efficiency reduction of downstream equipment caused by material supply fluctuation is avoided.

The invention relates to a composite functional carrier material and a preparation method thereof, and belongs to the technical field of resource utilization and biological energy. The preparation method comprises the following steps: S1, selecting waste biomass to prepare a matrix material; s2, performing pyrolysis treatment on the base material prepared in the S1 to obtain porous conductive activated carbon; and S3, mixing the porous conductive activated carbon obtained in S2 with a magnetic substance, an iron substance and an enzyme according to a mass ratio of (50-100): (10-50): (5-30): (1-10), and granulating to prepare the composite functional carrier material. The composite functional carrier material prepared by the invention has both environmental protection property and economical efficiency, can effectively inhibit the generation of harmful gases such as hydrogen sulfide and the like while increasing the yield of methane gas in the anaerobic fermentation process, and can realize magnetic recovery and cyclic utilization of the carrier material.

In the patent application document I have described a coordination mechanism of two pistons within a cylinder that allows a thermodynamic process such as expansion to be carried out. The pistons are moved by separate mechanisms that transform the continuous rotation of motor or generator shafts into irregular rectilinear motion. The objective of this invention is its use in power production facilities where efficient compression or expansion of gas or vapors is required. The applications can be: Expansion of steam produced in a biomass boiler. Expansion of steam produced with some energy source, primarily renewable. Compression and expansion of air in an external biomass combustion plant and compressed air-exhaust gas heat exchanger. Vapor-gas expansion produced by the combustion of ethanol and oxygen.

The utility model relates to a biomass fuel conveying device and a biomass combustion system with the same, and belongs to the technical field of biomass fuel conveying devices, the biomass fuel conveying device comprises a walking frame, a plurality of conveying rollers, a conveying belt, a conveying motor and a heating pipe, and the conveying rollers rotate on the walking frame at intervals; the conveying belt rolls outside the plurality of conveying rollers; the conveying motor is fixed to the walking frame and is in transmission connection with any conveying roller. The heating pipe is in an S shape, located on one side of the conveying rollers and fixed to the walking frame. And the conveyor belt corresponding to the upper parts of the plurality of conveying rollers is in sliding contact with the heating pipe. According to the biomass fuel drying device, the heating pipe is located on one side of the conveying rollers in an S shape and fixed to the walking frame, and the conveying belt corresponding to the upper portions of the conveying rollers is in sliding contact with the heating pipe, so that when the conveying belt conveys biomass fuel, the biomass fuel can be dried, the viscidity of the biomass fuel such as high-sugar crop straw and pomace is reduced, and the biomass fuel drying effect is improved. And the feeding continuity and stability are ensured.

The invention relates to the technical field of biomass combustion boilers, and discloses a biomass combustion system capable of achieving partitioned feeding, which comprises a combustion furnace, the upper end of the combustion furnace is communicated with a feeding chamber, a screening plate is hinged to one side of the upper end in the feeding chamber, and a screening transmission mechanism is arranged in the feeding chamber; two smashing rollers are arranged on the inner side of the lower end of the combustion furnace, a movable shaft is fixedly installed at the axis position of the other smashing roller, a smashing transmission mechanism is further arranged on the outer wall of the combustion furnace, discharging shafts are symmetrically and rotationally installed at the position, communicated with the feeding chamber, of the combustion furnace, discharging plates are installed on the discharging shafts, and a discharging transmission mechanism is arranged on the combustion furnace. A heat exchange mechanism is further arranged in the combustion furnace. Biomass fuels with different granularities are prevented from directly entering the combustion furnace, meanwhile, under the action of the crushing transmission mechanism, the biomass fuels with the different granularities are subjected to partitioned extrusion type crushing and feeding, and the combustion efficiency of the biomass fuels is greatly improved.

This invention discloses a bamboo-based plant dust fuel, its preparation method, and its application. The fuel is made from bamboo processing residues such as bamboo shavings and bamboo powder through crushing, drying, and sieving. Its particle size distribution is between 60 and 325 mesh, with a moisture content of less than 12 wt%, ash content of less than 5 wt%, and volatile matter content of more than 70 wt%. By precisely controlling key physical properties, this invention effectively solves the problems of low combustion efficiency, easy slagging, and high pollution associated with existing bamboo fuels. This fuel has the advantages of easy ignition, complete combustion, high calorific value, and low ash residue. Its preparation process is simple and low-cost, providing an effective way to utilize bamboo processing residues for high-value applications. It can be widely used as a solid fuel in various biomass combustion equipment.

A biomass burner includes a lateral shell having an axis of main development and a bottom provided in a lower end of the lateral shell to delimit the lateral shell at the lower part in order to internally define a compartment to contain the biomass. The bottom is able to support the biomass inside the containing compartment and is provided with one or more first holes configured for the introduction of primary air into the containing compartment.

The embodiment of the invention provides a biomass incineration fire point determination method and device, computer equipment and a medium, and relates to the technical field of atmospheric environment remote sensing monitoring, and the method comprises the steps: obtaining the column concentration of atmospheric trace gas, the profile of the atmospheric trace gas, the land utilization type and biomass incineration related data of a to-be-monitored area; according to the column concentration of the atmospheric trace gas and the atmospheric trace gas profile, calculating the near-surface atmospheric trace gas column concentration; according to the spatial-temporal variability of the near-surface atmosphere trace gas column concentration, determining an abnormally high-value grid in the near-surface atmosphere trace gas column concentration; and verifying the biomass incineration rationality of the abnormal high-value grid through the land utilization and biomass incineration related data, and determining the abnormal high-value grid passing the biomass incineration rationality verification as a biomass incineration fire point. According to the scheme, the accuracy and effectiveness of determining the biomass incineration fire point can be improved.

This application relates to a low-NOx burner for biomass pyrolysis fuel, belonging to the technical field of biomass combustion equipment. It includes a gasification chamber and a combustion chamber, which are connected. Multiple cooling boxes are fixedly arranged on the outer wall of the gasification chamber along the combustion direction of the biomass particles. One side of each cooling box is attached to the outer wall of the gasification chamber, and one end of each cooling box is connected to a water inlet pipe. Multiple water inlet pipes are connected to a water pump, which is connected to a water tank containing cooling water. The water tank is also connected to the ends of the cooling boxes furthest from the water inlet pipes. Multiple sets of temperature sensing components, each corresponding to a cooling box, are fixedly connected to the side wall of the gasification chamber. A water inlet flow control component connected to the temperature sensing components is provided on the water inlet pipe. The temperature sensing components are used to sense the temperature at the positions directly opposite the gasification chamber and the cooling boxes, and to drive the water inlet flow control component to regulate the flow rate of the water inlet pipe. This application allows for precise cooling of the gasification chamber.

The utility model discloses an automatic tracking engineering test vehicle driven by temperature difference, which particularly relates to the technical field of new energy power devices and comprises a supporting mechanism, the supporting mechanism comprises a vehicle body supporting plate, a driving shaft and a universal driving shaft, the driving shaft and the universal driving shaft are rotatably connected above the vehicle body supporting plate, and driving wheels are mounted at two ends of the driving shaft. And a driving motor and a capacitor module are mounted above and below the vehicle body supporting plate respectively. An off-grid power supply system is constructed through the thermoelectric power generation mechanism and the capacitor module (including the super capacitor bank and the voltage stabilization module), an independent energy chain is formed in combination with biomass combustion heat recovery, continuous energy supply of a single alcohol stove is achieved, and the device is suitable for power-free laboratories or emergency equipment; meanwhile, a pure mechanical system of a detachable cam, a transmission mechanism and a steering mechanism is adopted, automatic path tracking, electromagnetic interference resistance and no extra energy consumption are achieved by replacing a special-shaped cam contour line, precise control and low energy consumption are both considered, and a new energy power system is constructed.

This invention relates to a biomass combustion device for a pulverized coal boiler and its operating method. The biomass combustion device includes a furnace, a pulverized coal burner group, and a biomass burner group. The pulverized coal burner group is arranged in layers along the height of the furnace, independently located in the lower, middle, and upper layers of the furnace. The biomass burner group is positioned above each layer of the pulverized coal burner group. This invention achieves efficient and stable operation of pulverized coal and biomass co-firing through innovative structural modifications to the biomass burner and optimized design of the entire co-firing system. This invention innovatively designs nine multi-layer combination opening modes for the biomass burners, combined with different arrangement forms, to adapt to different operating conditions such as high boiler loads, flexibly adjusting the flame field and reburning zone characteristics, and balancing stable combustion, burnout rate, and NO₂. x The inhibitory effect is adapted to different environmental protection and efficiency requirements.

The invention discloses a biomass combustion boiler ash treatment device, and relates to the technical field of ash treatment, the biomass combustion boiler ash treatment device comprises a transfer trolley and a collection box, the transfer trolley is provided with a rotating device, the outer wall of the collection box is fixedly provided with an internal thread base, and the internal thread base is used for fixing the collection box on the rotating device of the transfer trolley; the rotating device is used for driving the collecting box to rotate to complete the dumping action, a discharging opening is formed in the collecting box, the discharging opening is sleeved with a sealing cover, a cover plate is fixedly installed at the top of the collecting box, a material receiving opening is formed in the cover plate, and the height of a material receiving pipe can be adjusted by starting and stopping an electric push rod; and the device is suitable for slag outlets of combustion boilers with different heights, the difficulty of ash collection is reduced, and the butt joint requirement is flexibly met.

The invention discloses a multifunctional biomass gasification furnace, and relates to the technical field of gasification furnaces, the multifunctional biomass gasification furnace comprises a connecting bottom plate, the top of the connecting bottom plate close to the edge of one side is provided with a combustion assembly used for gasifying various biomasses; two cleaning assemblies used for removing tar generated by biomass combustion are arranged at the position, close to the center, of the top of the connecting bottom plate. According to the multifunctional biomass gasification furnace, when the multifunctional biomass gasification furnace is used for combusting biomass fuel to generate combustible gas, quantitative limestone and biomass fuel are conveyed into the combustion chamber, the combustible gas is generated through combustion and conveyed into the cleaning chamber, tar in coal gas makes contact with the surface of a retention plate, and the tar in the coal gas makes contact with the surface of the retention plate; and tar particles are attached to the surface of the tar particles, so that the tar in the coal gas is purified, and the problem that in the prior art, the tar in most gasification furnaces is difficult to effectively remove and is easily attached to a gas conveying pipeline to damage the stable operation of the gasification furnaces is solved.

The utility model relates to waste heat recovery device technical field discloses a kind of waste heat recovery device of biomass combustion furnace exhaust gas, including air inlet bin, the air inlet bin is connected with air inlet flange, the air inlet bin is connected with exhaust flange, the air inlet bin inside is equipped with partition, the air inlet bin one side is connected with U-shaped displacement pipe, the U-shaped displacement pipe inside is equipped with U-shaped auxiliary pipe, the U-shaped auxiliary pipe inside is equipped with spring, the U-shaped auxiliary pipe inside is equipped with support rod, the U-shaped displacement pipe is fixedly connected with multiple support plate, the support plate is fixedly connected with support frame, the support plate is closely attached heat exchange bin;To guide the high-temperature gas inside U-shaped auxiliary pipe, and make it adhere to U-shaped auxiliary pipe inner wall, to increase the contact area of high-temperature gas, improve heat exchange efficiency.

The utility model relates to the technical field of biomass combustion machine discloses automatic deslagging combustion machine of biomass water -cooled evaporation, including base no.

The utility model relates to the technical field of slag salvaging machines, in particular to a slag salvaging machine of a biomass combustion furnace, which is characterized in that ash is discharged to a screening mechanism, the screening mechanism is started to convey the ash, the ash is filtered in the conveying process, the ash is respectively collected, and after the ash is discharged, the ash is conveyed to the screening mechanism. A screening device of the screening mechanism is cleaned through the stretching cleaning mechanism, and the practicability of the equipment is improved; comprising a slag salvaging mechanism; the device further comprises an auxiliary mechanism, a cooling mechanism, a collecting mechanism, a screening mechanism and a cleaning mechanism, the auxiliary mechanism is located on the left side of the slag salvaging mechanism, the cooling mechanism is located above the auxiliary mechanism, the auxiliary mechanism is installed on the collecting mechanism, the screening mechanism is located on the left side of the collecting mechanism, and the cleaning mechanism is located above the screening mechanism.

The utility model discloses a biomass combustion boiler, which relates to the technical field of agricultural machinery and comprises a boiler body, and a bag breaking chamber and a hearth are arranged in the boiler body. A plurality of horizontally-arranged branch pipes are arranged in the bag breaking chamber and arranged around straw bags, the ends of the branch pipes are fixed to a main pipe, the main pipe penetrates through the bag breaking chamber and extends outwards, the extending end of the main pipe is provided with a connector, the connector is connected with a hearth or a heat exchanger, and the heat exchanger is connected with the hearth. By means of the arrangement, the main pipe discharges smoke generated by materials in the hearth to the surfaces of straw bags through the branch pipes; smoke contains gas components such as carbon dioxide and nitrogen which do not support combustion, and when the smoke surrounds the straw bags, air (oxygen) can be isolated to a certain degree, so that combustion of the straw bags is inhibited, and the flame-retardant effect is achieved.

The utility model relates to combustion furnace waste gas treatment technical field discloses a kind of waste gas treatment equipment for biomass combustion furnace, including purification tank, the heat exchange cylinder is fixedly connected in the lower end of purification tank inner chamber, the serpentine heat exchange pipe is equipped at the center position of heat exchange cylinder inner chamber, the air inlet pipe is interconnected in the bottom end of one side of heat exchange cylinder, and air inlet pipe one end extends to purification tank outside through purification tank, and air inlet pipe gas outlet is interconnected with serpentine heat exchange pipe air inlet end, the filter cylinder is detachably nested in the top end of purification tank;The utility model can stir water body to improve heat exchange efficiency when heat exchange, realize waste gas heat is fully recovered, and simultaneously drive cleaning assembly to clean filter cylinder and conical guide plate in stirring process, so that dust is gathered and automatically falls into collection box through discharging chute, effectively reduce cleaning difficulty, improve the convenience and use effect of waste gas treatment.

The utility model discloses biomass combustion furnace waste gas treatment equipment, relates to waste gas treatment technical field, the device includes treatment box, filter box, intake pipe and exhaust pipe, filter box is provided on one side of treatment box, intake pipe is provided on one side of filter box, exhaust pipe is provided on one side of treatment box far away from filter box, exhaust pipe is provided on the other side of treatment box far away from filter box, exhaust pipe is provided on the other side of treatment box far away from filter box. Two filter screens are arranged in the filter box, through grooves corresponding to the filter screens in position are formed in the top of the filter box, a fixing assembly used for fixing the filter screens is arranged on the filter box, and a filter assembly used for secondary filtration is arranged in the treatment box. According to the utility model, the detachable filter screen is arranged, so that the filter screen is convenient to replace, when the filter screen loses an interception effect due to excessive dust accumulation or long-time use, an operator only needs to simply dismount and mount the filter screen to replace a new filter screen, and gas is secondarily filtered through the arranged filter bag.