34results about How to "Avoid impurities" patented technology

The invention belongs to the technical field of new energy materials, and discloses a method for preparing special high-purity manganous-manganic oxide for high-end lithium manganate from manganese sulfate, which is characterized in that manganese sulfate is used as a raw material, seed crystals are prepared firstly and then subjected to oxidative synthesis to enable the seed crystals to grow slowly, any additive is not needed, complex procedures such as roasting, crushing and the like are removed, and the method is suitable for industrial production. The manganous-manganic oxide particles with different particle sizes can be prepared, the prepared manganous-manganic oxide product is high in sphericity degree, controllable in particle size distribution, high in tap density and low in specific surface area, and the process has the advantages of being high in automation degree, improving the physical and chemical properties of manganous-manganic oxide, reducing the impurity content in the product and the like.

The utility model discloses a PCBA (Printed Circuit Board Assembly) surface mounting device, relates to the technical field of mainboard surface mounting, and aims to solve the problem that impurities exist on the upper surface of a produced object when the existing PCBA surface mounting device is used. The cleaning mechanism is installed above the output mechanism, a hydraulic telescopic rod is arranged in the middle of the lower end face of the cleaning mechanism, a servo motor is arranged at the lower end of the hydraulic telescopic rod, a fixing plate is arranged on the lower end face of the servo motor, and a cleaning brush is arranged on the lower end face of the fixing plate. The device comprises an output mechanism, a plurality of cleaning brushes are arranged on the inner wall of the output mechanism, the electric control fixing rods are installed on the two sides of the inner wall of the output mechanism, the two electric control fixing rods are arranged, one ends of the two electric control fixing rods are provided with electric control telescopic rods, the two electric control telescopic rods are arranged, and one ends of the two electric control telescopic rods are provided with clamping plates.

The utility model discloses a water drinking device for raising pigs, which comprises a bottom plate, the top of the bottom plate is fixedly connected with a water tank and a supporting seat, the top of the supporting seat is fixedly connected with a water tank, a connecting plate is fixedly connected between the water tank and the water tank, and a quantitative water injection structure is arranged above the connecting plate and between the water tank and the water tank. A water circulation structure is arranged below the connecting plate and located between the water tank and the water tank, and the top of the water tank is fixedly connected with a water inlet. Clear water is injected into the water tank through the quantitative water injection structure, freshness of drinking water is guaranteed, after pigs drink water, residual water in the water tank is recycled and filtered through the water circulation structure, large impurities are blocked through the screen, cleaning is convenient, meanwhile, tiny impurities and bacteria in water are filtered through the filter plate, water is guaranteed to be clean, and the water quality is guaranteed to be clean. And the filtered water returns to the water tank again for next use, so that the water resource is saved, and the problems of residual water and impurities in the water tank are avoided.

The utility model relates to a crown band tension adjusting device belongs to tire production equipment field. The bracket plate is fixed with crown band guide transmission wheel a, crown band guide transmission wheel b and crown band tension adjusting rod, the bracket plate behind crown band guide transmission wheel a is installed with tension measuring roller, the vertical fixed brush roller a and crown band tension roller a are installed on the bracket plate top, the parallel installation of crown band tension roller f and brush roller c is installed on the bracket plate behind tension measuring roller, the parallel installation of the crown band tension roller j and brush roller e that are tangent is installed on the side part top of frame, the h frame links through curved arm storage rack and frame, the h frame is installed with curved arm inner transmission roller a, curved arm inner transmission roller b and curved arm inner transmission roller c respectively in hinged point, the parallel installation of brush roller d, crown band tension roller g and crown band tension roller h is installed on the h frame top, the crown band tension roller k is installed through crown band tension roller shaft on the h frame lower side, the crown band tension roller i is installed on the h frame middle part above crown band tension roller k.

The invention relates to the technical field of azelaic acid processing, in particular to an azelaic acid cooling crystallization method and equipment, the azelaic acid cooling crystallization equipment comprises a bearing table, a mounting rack, a servo motor, a fixing frame, a reaction kettle, a feeding port and a discharging port, the mounting rack is fixedly mounted on the upper surface of the bearing table, the servo motor is fixedly mounted on one side of the mounting rack, and the fixing frame is fixedly mounted on the other side of the mounting rack; the fixed frame is fixedly mounted on an output shaft of the servo motor, the reaction kettle is fixedly mounted on the inner side of the fixed frame, the feed port is formed in the upper side of the reaction kettle, and the discharge port is formed in the lower side of the reaction kettle. The n-octane layer and the azelaic acid crystallization layer can be sent out from the two outlets through cooperation with the impurity removal assembly, impurities in the n-octane layer on a phase interface are prevented from making contact with an azelaic acid aqueous solution, and the purity of azelaic acid crystallization is improved.

The application discloses a high-temperature-resistant capacitor film resin and a preparation method and application thereof, and belongs to the technical field of capacitor film resins. The high-temperature-resistant capacitor film resin comprising polypropylene homopolymer chains and propylene / 4-methyl-1-pentene copolymer chains is prepared through a segmented in-situ polymerization process, wherein the high content of poly(4-methyl-1-pentene) segments in the propylene / 4-methyl-1-pentene copolymer chains can improve the temperature resistance of the resin, and the polypropylene segments can improve the compatibility of the resin, thereby solving the problems of non-uniformity, phase separation and poor high-temperature resistance existing in the rule blending, and realizing that the capacitor film prepared from the resin has low dielectric loss and high breakdown field strength under the condition of 125 DEG C.

The invention belongs to the technical field of rosemary extract preparation, and discloses a rosemary extract preparation method, which comprises: S1, raw material preparation and pretreatment: a, selecting high-quality rosemary as a raw material; b, carrying out drying treatment on the picked rosemary; through the high-pressure micro-jet technology, the extraction time is greatly shortened, and the production efficiency is improved; the cell structure of the raw material is physically destroyed through the high-pressure treatment process, the use of chemical solvents is avoided, so that the purity and safety of the extract are ensured, the quality of the extract can be further optimized by accurately controlling treatment parameters (such as pressure, flow, temperature and cycle index), and the extract is ensured to meet the requirements of high quality and high purity; essential oil components can be more thoroughly released by utilizing a high-pressure micro-jet technology, so that the yield of an extract is improved, more impurities and bad components can be removed through multiple times of circulating jet finishing treatment, and the purity of the essential oil is improved.

This invention relates to the field of nanoprinting plate technology, and more particularly to a coating material for nanoprinting plates and its preparation method. The preparation method includes: feeding nanoparticles, film-forming resin, curing agent, dispersant, solvent, and dye into a high-speed disperser for pre-dispersion to form a first dispersion; obtaining the vibration value of the sleeve at the temperature sensor probe during the pre-dispersion process and determining the maximum and minimum speeds of the high-speed disperser; obtaining the drive current deviation value of the motor of the high-speed disperser and determining the reverse rotation time of the motor; grinding the dispersion to be ground, and calculating the hardness of the residual hard agglomerates based on the drive current deviation value and determining the outlet back pressure of the feed pump of the sand mill; completing the grinding process according to the outlet back pressure to obtain a grinding slurry; adding a leveling agent to the grinding slurry to obtain the finished coating material for nanoprinting plates. This invention improves the film-forming performance of the finished coating material for nanoprinting plates.

The invention discloses a chlor-alkali industry brine excess alkali amount optimization method and system based on AI online analysis. The method comprises the following steps: acquiring multi-source data in a chlor-alkali production process, and preprocessing the multi-source data to form structured data; inputting the structured data into a pre-constructed AI decision model for variable correlation analysis, and outputting a real-time influence coefficient of each parameter on the excess alkali amount; selecting a plurality of parameters which have the maximum influence on the excessive alkali amount from the real-time influence coefficients, calculating the optimal control interval of the excessive alkali amount in combination with the process requirements and the optimal targets of energy consumption and raw material consumption, and generating an optimization scheme according to the priority; and adjusting the salt water excess alkali amount data in the chlor-alkali industry according to the optimization scheme. According to the method, the incidence relation between the excessive alkali amount and all the influence parameters is tracked in real time through the dynamic AI model, working condition changes are accurately captured and rapidly responded, the excessive alkali amount control precision is improved, and impurity residues caused by insufficient excessive alkali amount and technological hidden dangers caused by too high excessive alkali amount are effectively avoided.

The application discloses a boron nitride van der Waals epitaxial gallium nitride microwave material and a growth method. An ammonia-rich aluminum nitride nucleation layer is introduced on the surface of a boron nitride two-dimensional material, thereby providing high-density nucleation sites for the growth of a subsequent gallium nitride transition layer. The aluminum nitride nucleation layer is subjected to annealing treatment to block grain boundary dislocations. A gallium nitride transition layer with low temperature and high V / III ratio is introduced to promote a lateral epitaxial mode in the initial growth of the gallium nitride, thereby accelerating the turning and blocking of threading dislocations. The growth process of a gallium nitride buffer layer is high-temperature and low-V / III-ratio, thereby promoting the gallium nitride buffer layer to be in a layered epitaxial mode, improving the material surface morphology and crystal quality. A gallium nitride channel layer with high temperature and high V / III ratio is introduced to improve the electron transport characteristics. The technical scheme is based on a material growth method such as MOCVD, and the material is developed through one-time epitaxy technology. Through epitaxy technology improvement and process control, the material with high surface flatness, crystal quality and electron transport characteristics is developed.

The utility model relates to the technical field of gas sampling, in particular to a product sample gas analyzing and sampling mechanism. According to the technical scheme, the device comprises a barrel, a collecting tank, a rack, a connecting pipe and a piston, the piston is installed in the barrel in a sliding mode, the barrel is provided with the connecting pipe and an air inlet pipe, the collecting tank is installed at the bottom end of the connecting pipe, and the collecting tank, the connecting pipe and the air inlet pipe are each provided with a valve structure. According to the utility model, gas components originally contained in the sample storage container can be discharged before sampling through the matching of the structures, so that the sampled gas is prevented from being impure, and the precision of a subsequent detection result is improved.

The invention relates to a stirring casting preparation method suitable for a superfine SiCp reinforced aluminum-based composite material. The problems that in a traditional technology, wettability of SiCp and aluminum melt is poor, agglomeration is prone to occurring, an Al4C3 brittle phase is prone to occurring, and the melt is prone to being polluted by impurities and high in porosity are solved. The preparation method comprises the following steps: performing in-situ growth of graphene on the surface of SiCp through pulse laser-methane micro-explosion to form a composite reinforced phase; carrying out aluminum alloy fractional smelting and step-by-step stirring to obtain a composite melt; an external coil-iron core assembly is adopted to carry out pulse magnetic oscillation on the melt, and mechanical stirring and argon degassing are synchronously matched; and finally casting and molding. According to the method, generation of Al4C3 can be avoided, uniform dispersion of SiCp is achieved, the density of the obtained composite material is larger than or equal to 99.2%, the 0.2% yield strength is larger than or equal to 220 MPa, the heat conductivity retention rate is larger than or equal to 99%, the increment of the iron content of the melt is smaller than or equal to 50 ppm, ton-level mass production can be achieved based on conventional equipment, and the method is suitable for industrial preparation of the high-performance aluminum-based composite material in the fields of aerospace and automobiles.

This invention proposes a superconducting magnet cooling system, relating to the field of superconducting magnet design technology. The system includes: a superconducting coil cavity for mounting a superconducting coil; two ends of a cooling pipe connected to the superconducting coil cavity; a gas driving component for driving gas from the superconducting coil cavity into the cooling pipe and then back into the superconducting coil cavity; the gas in the cooling pipe is adapted to flow through a first cooling component to cool the gas in the cooling pipe; at least a portion of the cooling pipe passes through a second cooling component to cool the gas in the cooling pipe. The superconducting magnet cooling system of this invention can improve the cooling rate, quickly restore the low-temperature environment within the superconducting coil cavity after a superconducting magnet failure, avoid residual cooling medium within the superconducting coil cavity, improve cleanliness, ensure the operational stability and reliability of the superconducting coil, and has better performance and wider applicability.

The invention provides a production process of an LED flexible circuit board with an infinitely long double-sided tin conduction blind hole, and aims to solve the problems of high cost and low efficiency caused by plasma cleaning and blind hole electroplating in the prior art and solve the problem that the traditional production mode cannot meet the requirement of an infinitely long circuit board. Continuous production is conducted in a roll-to-roll mode, the blind holes are formed through laser drilling, conduction between the top-layer copper foil and the bottom-layer copper foil at the positions of the blind holes is achieved through the SMT technology and the reflow soldering technology, and plasma cleaning and blind hole electroplating are not needed. The process is suitable for producing the LED flexible circuit board with the length range of 1-200m, the cost can be effectively reduced, the production efficiency is improved, and the reliability and the quality of the product are enhanced. The invention relates to the technical field of flexible circuit board production.

The utility model discloses an air inlet filtering mechanism for low-pressure casting, which comprises a connecting seat, a heating device arranged at the bottom of an inner cavity of the connecting seat, a liquid storage box arranged at the top of the heating device, a liquid inlet pipe arranged on the right side of the liquid storage box, a liquid delivery pipe arranged in the inner cavity of the liquid storage box, and a gas compression device arranged on the left side of the connecting seat. A supporting plate is arranged in an inner cavity of the connecting base, a lower die is arranged at the top of the supporting plate, and a hydraulic cylinder is arranged at the top of the connecting base. The low-pressure gas can be filtered through the filter screen when the low-pressure gas is blown out through the gas outlet pipe, the conditions of impurities and dust are prevented, meanwhile, an activated carbon material can adsorb small impurities of the gas, and therefore double filtration and purification can be conducted on the low-pressure gas, the quality of the low-pressure gas is improved, and the influence on the quality of a cast mold is prevented; and the output shaft of the electric motor drives the fan blades to rotate to blow and dissipate heat of the cast mold, so that the mold is quickly cooled, the time is shortened, and the working efficiency of a user is improved.

The utility model provides a lubricating oil sample barrel bottom sampler which comprises a sampler main body, a sampling hose detachably arranged on the sampler main body and a counterweight device detachably arranged at one end, far away from the sampler main body, of the sampling hose, and a quick release device is arranged between the sampler main body and the sampling hose. The quick release device comprises a tubular connecting end head arranged at one end of the sampler main body, a connecting groove which is formed in the connecting end head and is used for inserting one end of the sampling hose, and a plurality of sliding holes which are formed in the side wall of the connecting end head and are communicated with the connecting groove; the abutting clamping pieces can slide in the radial direction of the connecting end head, are arranged in the sliding holes and are used for abutting against the outer side wall of the sampling hose so as to limit the sampling hose to slide in the axial direction of the connecting end head to be separated from the connecting end head, and the locking device is arranged on the connecting end head and is used for locking the abutting clamping pieces in a releasable mode.

The present application provides a folding display device. The folding display device comprises a bending mechanism and a front frame structure. The bending mechanism comprises a first support part and a second support part that are rotatably connected to one side of the bending part, and a third support part and a fourth support part that are rotatably connected to another side of the bending part. The front frame structure comprises a first front frame part connected to the first support part, a second front frame part connected to the second support part, a third front frame part connected to the third support part, and a fourth front frame part connected to the fourth support part.

Provided are a pharmaceutical composition containing an anti-TSLP antibody, and a use thereof. In particular, provided are a pharmaceutical composition, containing (a) an anti-TSLP antibody, (b) a buffer, (c) a surfactant, and one or more (d) stabilizers, and a use of the pharmaceutical composition in preparation of a medicament for treating and preventing TSLP-related diseases.

The application provides an amorphous nanocrystalline soft magnetic alloy powder and a preparation method and a magnetic powder core thereof, and relates to the technical field of soft magnetic materials. The preparation method of the amorphous nanocrystalline soft magnetic alloy powder adopts high-energy electric pulse technology to realize instantaneous rapid heating and explosion of the amorphous alloy material, and realizes accurate control of the powder particle size by accurately controlling energy input parameters and interval parameters, thereby preparing high-sphericity soft magnetic powder with a median particle size of 0.5-5 mu m, significantly improving the uniformity and dispersity of the powder, and solving the problem of low particle size control accuracy in the prior art. Moreover, the preparation method has a simple process flow and low energy consumption, avoids impurities and defects introduced in the traditional multi-step process, and improves the purity and performance of the material. The prepared amorphous nanocrystalline soft magnetic alloy powder has the characteristics of small particle size, high sphericity, high saturation magnetization, low coercivity and high yield, and is particularly suitable for the field of high-frequency magnetic elements and precision electronic devices.

This invention discloses a sodium methoxide solution distillation suction device, comprising a distillation suction device body, with a vacuum pump connected to the left side of the body. This invention involves placing a rubber tube into a sodium methoxide solution container, which then floats continuously on the surface via a float ring, preventing the absorption of impurities from the sodium methoxide solution. The user then activates the vacuum pump, which extracts air from the inside of the device body, creating a negative pressure environment. The sodium methoxide solution is then drawn through a metal tube and absorbed into the device body via an absorption hopper. Impurities in the solution are then purified using filter and purification plates, and the solution can be discharged and collected. This method replaces existing absorption methods that easily absorb impurities during the absorption process, thus avoiding the absorption of impurities during the absorption process.

The utility model relates to urea melting pump technical field, and disclose a kind of urea melting pump, including main body structure, the main body structure includes fixed base, filter cartridge, engaging groove, sealing cover and engaging block, and engaging groove and engaging block are equipped with two groups, and the lower surface of sealing cover is attached to the upper surface of filter cartridge;Anti-vibration structure, the anti-vibration structure is equipped with four groups, and anti-vibration structure includes connecting seat, connecting plate and fixed plate.The utility model can filter the urea that flows through the inside of filter cartridge by filter core, and by the setting of two engaging grooves and engaging block, so that staff only needs to rotate sealing cover when the lower surface of sealing cover is attached to the upper surface of filter cartridge, the installation and disassembly of sealing cover can be completed, the design can avoid the impurity or solid particle in urea, enter pump body, to avoid the wear and tear, blockage or corrosion of pump body as far as possible.

The present invention relates to a method for preparing a MOSFET device and a MOSFET device. The preparation method comprises the following steps: growing an N-type epitaxial region on the surface of a silicon carbide N+ substrate and etching to form an epitaxial layer; depositing a silicon nitride layer and sequentially forming a P-WELL layer, an N Source layer and a P-PLUS layer through a self-alignment process; etching and removing a first gate polysilicon layer and a first oxide layer deposited for positioning in the self-alignment process, and then depositing and etching to obtain a second oxide layer and a second gate polysilicon layer, thereby completing the preparation of the MOSFET device. The present invention introduces a self-alignment process for design and preparation, thereby replacing multiple photolithography steps, avoiding the introduction of impurities or defects through excessive photolithography steps, and facilitating the control of production costs. When the P-WELL layer, the N Source layer and the P-PLUS layer are prepared through the self-alignment process, the positioning accuracy is higher, thereby improving the device performance and reliability.

The present invention discloses a water washing device for electroplated parts used in electroplating processing, and belongs to the technical field of electroplating processing. The device comprises a water washing tank, a workbench is fixedly arranged in the water washing tank, the workbench divides the water washing tank into a washing chamber and a wastewater chamber, a plurality of rotating seats are rotatably arranged on the workbench, each rotating seat is provided with a positioning component, a lifting and flushing mechanism corresponding to the plurality of rotating seats is also arranged on the workbench, the lifting and flushing mechanism is connected with a transmission component for driving the rotating seat to rotate, a water outlet connected to the wastewater chamber is provided at the center of the rotating seat, and a water guide component is arranged between the water washing tank and the lifting and flushing mechanism; the present invention can realize a comprehensive cleaning effect on the workpieces by cleaning the workpieces one by one to avoid the workpieces being in a piled state, ensure the cleaning effect of the workpieces, avoid impurities remaining on the outside of the workpieces, and thus ensure the subsequent processing quality of the workpieces.

The utility model discloses multi-stage purification equipment for preparing synthetic spices, which comprises a filtering and purifying mechanism, the filtering and purifying mechanism comprises a filtering and purifying kettle, a filter screen is arranged in the filtering and purifying kettle, and a bottom discharge port of the filtering and purifying kettle is connected with a cracking reaction kettle through a guide pipe. A material outlet of the cracking reaction kettle is connected with a circulating mechanism through a guide pipe, and the circulating mechanism is used for guiding materials discharged by the cracking reaction kettle into the filtering and purifying mechanism. Then the materials in the barrel are injected into the filtering and purifying kettle again to be filtered, so that multi-time multi-stage purification can be completed, and the purity of the product is higher; the stirring mechanism is arranged in the filtering and purifying kettle and can stir materials, so that the materials wriggle, and impurities in the materials can be avoided.

The efficient multi-impurity filtering device comprises a supporting frame, a shell is fixedly connected to the interior of the supporting frame, a shell body is fixedly welded to the upper portion of the shell, a driving motor is connected to the top of the shell body through bolts, a feeding port is fixedly connected to one side of the shell body, and a discharging port is fixedly connected to the other side of the shell body. A heat preservation box is fixedly welded to the surface of the shell, a heating pipe is fixedly installed on the surface of the shell, the output end of a driving motor is in transmission connection with a rotating shaft through a coupler, stirring paddles are fixedly connected to the periphery of the rotating shaft, and stirring rods are fixedly welded to the bottom of the rotating shaft; according to the efficient multi-impurity filtering device for the SP-80 emulsifier, the heating pipe can accelerate the emulsifying speed, reduce materials adhered to the inner wall of the shell, improve the mixing effect, effectively heat and preserve heat, and avoid the phenomena of carbonization, caking and impurity generation in the emulsifying process.

The invention discloses a method for preparing β″-alumina, and belongs to the technical field of alumina production. The invention utilizes the synergistic effect of modified α-alumina and modified θ-alumina, combined with sodium salt, to promote the transformation of crystal form during sintering, so that the formation of β″-alumina is more stable and has high purity. At the same time, alcohol wet grinding and the use of dispersants and stabilizers are adopted to ensure the uniformity and stability of ball mill slurry, effectively prevent particle agglomeration and precipitation, and improve the preparation efficiency and product quality of β″-alumina. In addition, during calcination, under the protection of nitrogen atmosphere, the preparation process of pre-sintering and main sintering is adopted to ensure the crystalline integrity of the material at high temperature, avoid unnecessary phase change and impurity generation, and obtain β″-alumina with excellent performance.

The present invention provides a square VO2 nanosheet and a preparation method and application thereof, comprising the following steps: step 1, dissolving vanadium acetylacetonate in a mixed solution of isopropanol and water, stirring to form a precursor solution A; step 2, transferring the precursor solution A into a polytetrafluoroethylene-lined autoclave at 180-190°C for hydrothermal reaction, and centrifuging to obtain a precipitate; step 3, washing the precipitate after centrifugation with deionized water and anhydrous ethanol, and drying to obtain a pure phase VO2 nanosheet. The monoclinic metastable phase VO2 nanosheet obtained by using a hydrothermal method with a simpler preparation process and less danger has excellent photocatalytic performance under visible light and near-infrared light, and is more environmentally friendly.

The application discloses a conjugated crosslinking monomer, a solid-phase-free drilling fluid thickening agent, and a preparation method and application thereof. The conjugated crosslinking monomer has a stereoscopic alkyl structure and a conjugated diene structure, and is shown in the following formula. The conjugated crosslinking monomer is prepared by synthesizing an alkenyl compound with an adamantane compound in the presence of a catalyst. The conjugated crosslinking monomer is reacted with an alkenyl amide and an alkenyl sulfonic acid to obtain the solid-phase-free drilling fluid thickening agent. The thickening agent has good temperature resistance and salt resistance, and can improve the suspension and rock carrying performance of a clay-free drilling fluid system in a medium-deep well.

The application discloses a method of backwashing filter device based on electromagnetic control, which comprises a filter tank shell, a composite filter layer arranged in the filter tank shell, and an electromagnetic system, wherein the composite filter layer comprises magnetic filter material and non-magnetic filter material; the electromagnetic system comprises an electromagnet generator and a magnetic field generating unit arranged around the filter tank shell; the magnetic field generating unit comprises a plurality of electromagnet cores and coils wound around the electromagnet cores; the electromagnet generator is electrically connected with the coils through wires and provides direct current or alternating current to the coils. In the backwashing stage, the alternating action of the direct current and alternating current magnetic field guides the spatial reconstruction or micro-vibration of the magnetic filter material, thereby enhancing the filter layer flushing effect and improving the backwashing efficiency. The device realizes low energy consumption, low water consumption and high efficiency backwashing, and has the advantages of compact structure, high automation degree and strong adaptability, and is suitable for the solid-liquid separation process of mine dewatering water, industrial circulating water and sewage treatment.

This utility model discloses a biogas collection and utilization device, belonging to the field of biogas collection technology. It includes a collection tank for collecting biogas, with a deodorizing filter assembly connected to one side of the collection tank for deodorizing and filtering the biogas. The other end of the deodorizing filter assembly is connected to a fermentation tank for fermenting manure. An air inlet valve is provided at the top of the fermentation tank. The deodorizing filter assembly includes a filter box, which is connected to the collection tank and the fermentation tank via connecting pipes. The filter box has a filtration chamber and an adsorption chamber inside, and the filtration chamber and adsorption chamber are connected. A filter plate is installed inside the filtration chamber, and activated carbon is installed inside the adsorption chamber to adsorb odors from the biogas. This solution avoids impurities and odors in the collected biogas, improves the collection quality of the biogas, and makes the treated biogas more suitable for various application scenarios.