87results about How to "HEPA filter" patented technology

This invention discloses a time-constrained, secure, and controllable data flow method in a cloud-edge environment, belonging to the field of mobile edge cloud computing. Specifically, it involves: First, establishing a communication scenario including an authorizing agency for both the sender and receiver, the sender, edge nodes, a cloud server, and the receiver. Given security parameters, the authorized agency for the receiver runs a global initialization algorithm, outputting public parameters and domain public / private keys. Then, the authorized agency for the sender inputs the public parameters and domain public key, outputting its own domain public / private key. For each sender, an access structure and a valid time interval are assigned, and an encryption key is generated. For each receiver, an attribute set is assigned, and a decryption key is generated. Finally, the sender runs the encryption algorithm and outputs the original ciphertext; the edge node verifies the sender's sending authority and outputs the cleaned ciphertext; and the legitimate receiver decrypts and outputs the plaintext. This invention meets the requirements for secure and controllable data flow in a cloud-edge environment.

The invention provides a self-corrosion permeable pollutant blocking material for underground water treatment and a preparation method of the self-corrosion permeable pollutant blocking material, and belongs to the technical field of underground water remediation. The self-corrosion permeable pollutant blocking material for underground water treatment is prepared from the following components in percentage by mass: 25 to 35 percent of cement, 12 to 18 percent of 2CaSO4. H2O, 8 to 15 percent of fly ash, 25 to 30 percent of grading pore-forming aggregate, 14 to 18 percent of nano pore-forming aggregate, 1 to 1.5 percent of viscosity modifier, 0.5 to 1 percent of early strength agent and 3 to 4.5 percent of modified biomass fiber, a pore matrix is jointly built through grading pore-forming aggregate, nano pore-forming aggregate and modified biomass fibers, the grading pore-forming aggregate and the nano pore-forming aggregate have self-corrosion shells, the pore-forming aggregate is an inactive substance and does not participate in the reaction of silicate cement from the stage before grouting to the hardening stage, and after the material is completely hardened, the pore-forming aggregate is a self-corrosion shell. And the graded aggregate and the nano pore-forming aggregate are converted into permeable pores containing active substances. The material has the advantages of being good in connectivity, high in supporting performance, wide in pollutant treatment capacity, high in pollutant treatment efficiency, long in continuous treatment time and the like, has anti-blocking capacity and can be pumped.

This application provides a rainwater harvesting and utilization system for vertical greening buildings, relating to the field of green building. It includes a downpipe and a water storage tank embedded in the base of the building. One end of the downpipe connects to the top of the building, and the other end of the downpipe has a first branch pipe and a second branch pipe. One end of the first branch pipe connects to the downpipe, and the other end has a detachable sealing cap. One end of the second branch pipe connects to the downpipe, and the other end supplies rainwater to the water storage tank. The second branch pipe is equipped with a filter mechanism for filtering rainwater. The water storage tank contains a water pump and a sprinkler pipe. The water pump pumps the rainwater from the storage tank through the sprinkler pipe for watering the plants. This application has the effect of collecting and reusing rainwater without causing silt accumulation and clogging.

The invention discloses a crown block track surface cleaning device in a semiconductor workshop, which comprises a bottom plate, a frame is arranged on the bottom plate, and a first negative pressure fan and a second negative pressure fan are arranged in the frame; a negative-pressure air draft longitudinal cylinder extending upwards is arranged in the frame, and the bottom end of the negative-pressure air draft longitudinal cylinder is connected with a first negative-pressure fan and a second negative-pressure fan through pipelines in a communicating mode. A negative pressure air draft transverse barrel is arranged at the top end of the negative pressure air draft longitudinal barrel, the negative pressure air draft transverse barrel is vertically arranged at the top end of the negative pressure air draft longitudinal barrel, and the negative pressure air draft transverse barrel is communicated and connected with the negative pressure air draft longitudinal barrel; the two ends of the negative-pressure air draft transverse barrel are provided with dust removal modules which protrude downwards and are matched and symmetrical, and each dust removal module comprises a dust removal head cavity. Through non-contact suspended positive and negative air passage cleaning, efficient and automatic cleaning of the crown block rail surface of the semiconductor workshop is achieved, and the cleanliness of the semiconductor production environment is effectively improved.

The utility model provides a novel air -cooled steam cooler belongs to cooler technical field. It solved the problem that the existing air -cooled steam cooler lacks filter structure, causes impurity to enter the inside of organism, influences spare part loss and overall service life. The novel air -cooled steam cooler, including organism and the screw hole position of fan installation on the organism, the organism has two convex platforms that protrude outward, the fan is two and is covered in the outside of corresponding convex platform through screw respectively, the convex platform end face is provided with annular groove, is provided with a plurality of installation groove positions that communicate with annular groove on the inside of convex platform, the skeleton filter screen is clamped in annular groove, and the skeleton filter screen includes skeleton ring and filter screen part, and is equipped with a plurality of positioning parts positioned in corresponding installation groove position between skeleton ring and filter screen part, and the inner wall of positioning part has arc -shaped clamping groove's arc -shaped clamping section, and the outer ring of filter screen part has the hoop ring. The utility model has the advantages of efficient filtration and prolonging overall service life.

The utility model provides a kind of air purification device, it is related to purification equipment technical field, solve the technical problem that fixed purification equipment is difficult to meet different scene needs.The air purification device, including main body, filter assembly, purification assembly, bottom plate, universal wheel;Main body is installed on bottom plate;Filter assembly is set in main body, to carry out physical filtration to air;Purification assembly is set in main body, and it is side by side with filter assembly and is arranged, for carrying out chemical purification to air;Universal wheel is installed in main body bottom.The utility model is used for the air purification of multiple scenes.

The application discloses a kind of fine-grained vanadium-titanium iron concentrate filtration pretreatment methods, comprising the following steps: fine-grained vanadium-titanium iron concentrate and water are mixed and the mass fraction of the fine-grained vanadium-titanium iron concentrate in the obtained suspension is adjusted to predetermined concentration, obtain first slurry;First slurry is passed through demagnetizer, and demagnetization is carried out, and second slurry is obtained;Second slurry is treated with ultrasonic wave, and third slurry is obtained;Third slurry is mixed with a predetermined amount of flocculating agent and then sent into a magnetic separation column after stirring, the operating parameters of the magnetic separation column are adjusted, the height difference between the mixed slurry in the magnetic separation column cylinder and the overflow surface is controlled, and the mass fraction of fine-grained vanadium-titanium iron concentrate in the fourth slurry flowing out of the magnetic separation column is controlled to be a predetermined concentration, and the flocculating agent is prepared from corn starch;Vacuum filtration is carried out on the fourth slurry.It is beneficial to increase the agglomeration diameter of fine-grained vanadium-titanium iron concentrate particles before filtration, reduce the moisture content of the product obtained after filtration of fine-grained vanadium-titanium iron concentrate, and improve the filtration efficiency.

This invention relates to the field of functional filtration materials technology, specifically to a gradient interlocking knitted-woven composite filter cloth. It comprises a woven dual-pore structure superoleophilic and oil-guiding surface layer, a knitted three-dimensional fluffy structure superoleophobic filter core layer, a conductive electret transition layer with a textured surface that eliminates static electricity and adsorbs fine oil mist, and a woven continuous microgroove structure superoleophobic and oil-draining bottom layer. These four layers are composited from top to bottom, forming an interlocking weave structure. The pore size of the filter core layer decreases gradually from top to bottom, while the pore size of the oil-draining bottom layer increases gradually from top to bottom. The overall pore size of the filter cloth first decreases gradually from top to bottom, then increases gradually. This filter cloth achieves graded and precise filtration through multi-layer composite structure and gradient pore size design. The interlocking weave structure enhances the overall structural stability, while also possessing multifunctional properties such as directional oil guidance and drainage, conductive electret antistatic properties, and more.

The utility model discloses a novel stop valve which comprises a shell, an upper sealing gasket is fixedly connected to the side inner wall of the shell, an upper rotating plate is rotationally connected to the interior of the shell, an upper conveying pipe is embedded in the upper rotating plate, a rotating rod is fixedly connected to the upper surface of the upper rotating plate, and a rotating handle is fixedly connected to the upper end of the rotating rod. A lower sealing gasket is fixedly connected to the side inner wall of the shell, a lower rotating plate is rotationally connected to the interior of the shell, a lower conveying pipe is embedded in the lower rotating plate, the lower end of the upper conveying pipe and the upper end of the lower conveying pipe are in threaded connection with a filter box through a connector, filler is arranged in the filter box, and a protective cover is rotationally connected to the front surface of the shell through a hinge; the right surface of the shell is fixedly connected with an input pipe, the left surface of the shell is fixedly connected with an output pipe, and through the devices, fluid on-off control, sealing leakage prevention, impurity filtration and convenient maintenance of the filter box can be achieved.

The application discloses a filtering device for sealing and leak detection test fluorine oil, which comprises a flow director, a buffer oil storage tank and a filtering assembly connected in series; the filtering assembly comprises a filter core group, a differential pressure measurement assembly and an optical monitoring assembly; the differential pressure measurement assembly comprises a differential pressure sensor body and a pressure lead pipe; the differential pressure sensor body is connected in parallel to both ends of the filter core group through the pressure lead pipe; the filter core group comprises at least two filtering units connected in series; the optical monitoring assembly comprises a laser emitting unit, a transparent detection pipe and a photoelectric receiver; the transparent detection pipe is arranged between the two filtering units; the laser emitting unit and the photoelectric receiver are arranged on both sides of the transparent detection pipe; the laser emitting unit emits laser which passes through the transparent detection pipe and is received by the photoelectric receiver. The multi-stage filtering is more efficient; the differential pressure measurement assembly can indirectly monitor the filter core state; and the optical monitoring assembly can monitor the fluorine oil.

The utility model discloses a cooling fan for a resistor cabinet. The cooling fan comprises a cabinet body; the cooling mechanism is arranged on one side of the cabinet body, and the cooling mechanism is used for cooling the interior of the cabinet body; the air outlet assembly is arranged on the other side of the cabinet body, and the air outlet assembly is used for discharging air flow in the cabinet body; the cooling mechanism comprises a mounting shell, a fan body and two flow guide covers, the mounting shell is fixedly connected to one side of the cabinet body, the fan body is arranged in the mounting shell, and the flow guide covers are arranged on the side, close to the cabinet body, of the mounting shell. According to the cooling fan for the resistor cabinet provided by the utility model, through the arrangement of the cooling mechanism, the interior of the cabinet body can be well cooled, dust and impurities are prevented from entering the cabinet body to influence the use of internal elements, and moisture in introduced airflow can be well filtered; and the situation that water enters the cabinet body to influence the use of internal elements is reduced.

The utility model discloses a PHA material straw which comprises an outer straw body, an inner straw body is in threaded connection with the interior of the upper end of the outer straw body, an upper connecting ring is arranged at the lower end of the outer straw body, a plurality of elastic petal pipes are connected to the lower end of the upper connecting ring, and a lower connecting ring is connected to the lower ends of the elastic petal pipes. The lower end of the lower connecting ring is provided with an inverted-cone-shaped puncture suction head, the upper side of the outer portion of the inner suction pipe is connected with a limiting ring, the upper end of the upper connecting ring is connected with a connecting sealing pipe, the connecting sealing pipe is inserted into the lower end of the outer suction pipe and tightly attached to the outer wall of the inner suction pipe, and the lower end of the inner suction pipe is internally connected with an upper connecting frame. Through threaded connection of the outer suction tube and the inner suction tube and deformation control of the elastic petal tubes, switching between the straight suction function and the filtering suction function is achieved, the elastic petal tubes are tightly attached to form a sealed connection straight tube during straight suction, the elastic petal tubes are bent to form filtering gaps during filtering suction, the structure is simple, and the functions are diversified.

The invention discloses molten iron spheroidizing equipment for nodular cast iron well lid production, and relates to the technical field of molten iron spheroidizing equipment.The molten iron spheroidizing equipment comprises a mounting frame, a guide rail is arranged on the mounting frame, a ladle trolley and a hydraulic push rod which move along the guide rail are arranged on the guide rail, the hydraulic push rod is arranged on the mounting frame, and the output end of the hydraulic push rod is connected with a lifting plate; and the driving mechanism is used for driving the lifting plate to vertically lift. The device has the advantages that splashing and disordered diffusion of flue gas are inhibited from the source by combining an under-liquid feeding mode of the material guide pipe with enclosure sealing of the sleeving cylinder, the negative pressure flue gas treatment system realizes immediate capture and efficient filtration of reaction flue dust, the working environment is remarkably improved, self movement of the ladle vehicle is creatively utilized as a power source, and the energy consumption of the ladle vehicle is reduced. The scraping assembly and the lifting rapping mechanism are driven in a linkage mode, automatic removal of splashing residues and inertial dust removal of the filtering unit are completed respectively, and self-maintenance of key functional components is achieved.

The utility model relates to dust absorption device technical field discloses a dust collector with noise reduction structure, including the shell, the outside fixed connection of shell has the cleaning mechanism, the inside fixed connection of cleaning mechanism has the filter structure, the outside fixed connection of cleaning mechanism has the connecting mechanism, the filter structure includes the frame, the inside slide connection of frame has the filter plate, the outside fixed connection of filter plate has the connecting block no.

The utility model relates to a mining filling drainage device which comprises a box body, a feeding stirring part is arranged at the top of the box body, a drainage pipe and a support are arranged at the bottom of the box body, and a filtering device is obliquely arranged in the box body. The filtering device comprises a plurality of frames which are obliquely inserted into the box body at intervals, the inner surface of each frame is connected with a filter screen, and filter holes of the filter screens are sequentially reduced from top to bottom; each frame is slidably inserted between two supporting strips, and the supporting strips are symmetrically arranged on the inner side wall of the box body in pairs; the frame is fixedly connected with the box body in contact with the frame through a plurality of positioning pins; a moving frame is arranged above each filter screen and is connected between the two side walls of the box body in a sliding manner, and a cleaning brush is arranged at the bottom end of each moving frame and is positioned on the upper surface of the corresponding filter screen. According to the device, efficient filtering and convenient cleaning are achieved through the multi-stage filter screen design and the movable frame cleaning brush mechanism, the problems that in a traditional device, disintegrating slag is mixed into a water body and the filter screens are blocked are effectively solved, and thorough separation of the disintegrating slag and the water body and long-term effectiveness of the filter screens are guaranteed.

The utility model relates to clean operating room material delivery technical field especially an intelligent delivery window of real -time monitoring cleanliness, including fixed frame, the inside lower extreme of fixed frame is equipped with the transmission cavity that front, rear end opening, the front, rear end opening position hinged joint of transmission cavity possesses the toughened glass window of self -locking module. The utility model discloses an intelligent delivery window of real -time monitoring cleanliness is integrated particle counter, differential pressure sensor and data display module in the inside, and real -time monitoring and display the cleanliness parameter in the window, and linkage with clean room control system simultaneously, and the delivery window is locked when the alarm is automatically reported when exceeding the standard, prevents pollution diffusion, through the filter chamber of n shape structure being opened in the fixed frame inside and being located transmission cavity periphery, the detachable high -efficient filter is installed in the filter chamber inside, can high -efficiently filter the air in transmission cavity, cooperate the ultraviolet sterilizing lamp of being arranged on the inner wall, greatly promote internal cleanliness.

The invention discloses a working face dust removal, spraying and fresh air system for a coal mine, and belongs to the technical field of coal mine underground environment governance and occupational health safety. The system comprises a track hoisting and moving device, a wet-type vortex dust removal fan, a spraying and dust falling device, a fresh air device and an automatic control system. The structural frame is hung on the moving trolley through the hanging chain and is driven by the driving main machine to move dynamically along the track. The dust removal fan adopts the combination of a radial mixing type impeller and a dewatering vortex wheel, so that powerful dust collection and dry and comfortable exhaust are realized; the spraying device realizes intelligent avoiding and spraying stopping through a personnel proximity sensor; the fresh air device is of a double-channel structure, and positive-pressure clean fresh air is provided for the breathing area through four-stage deep purification. The problems that traditional equipment is installed and fixed, functions are split, people are prone to getting wet, and breathing guarantee is lacked are solved, integrated cooperation of full-working-face dynamic cruise control, precise dust suppression and medical-grade fresh air supply is achieved, and the safety and comfort of underground operation are remarkably improved.

The utility model discloses a kind of crystallizing tank devices of automation precision temperature control, it is related to crystallizing tank technical field, specifically a kind of crystallizing tank devices of automation precision temperature control, including crystallizing tank main body, further include filter component;By setting first collecting hopper, cylinder, second collecting hopper and spiral conveying rod and the structure such as etc., the efficient filtration to impurity in crystallization is realized.Crystalline is conveyed to right side under the driving of spiral conveying rod, falls down impurity through filter screen in the process, while fixed rod on spiral conveying rod further drives crystalline to turn over, improve filtering effect.In addition, cylinder can slide left and right under the driving of second motor, further enhance the turning effect of crystal, make impurity more fully contact with filter screen, to realize more thorough filtration.Compared with prior art, the filtering efficiency of the utility model is significantly improved, can effectively remove impurity in crystallization, improve the purity of product, satisfy the demand of high-purity product production.

This utility model discloses a gas filtration device, which includes an inlet cabinet and an outlet cabinet. The inlet cabinet is positioned above the outlet cabinet, and a filter screen is installed between the two cabinets. Two dust collection bags are installed on both sides inside the inlet cabinet, and the dust collection bags are surrounded by a partition net. A ventilation cavity is formed between the adjacent partition nets on the outer sides of the two dust collection bags. Through holes are provided on the side panels of the inlet and outlet cabinets, as well as on the doors of both cabinets. A filter box is located below the filter screen, and a filter assembly is installed inside the filter box. An exhaust fan is located below the filter box, and the exhaust port on the filter box is connected to the air inlet of the exhaust fan via a ventilation pipe. The gas filtration device inputs gas through the side panel of the inlet cabinet, filters it through the dust collection bags and the filter box, and outputs it through the side panel of the outlet cabinet. This effectively filters fine particulate matter near the ground, maintaining a high level of cleanliness in the space where machine racks and workbenches are located in the workshop.

The utility model discloses integrated carbonization line filter equipment, including filter box, and the water inlet pipe and the water outlet pipe are penetrated and are fixed on filter box, and the filter box upper end is open, and the first sleeve pipe and the second sleeve pipe are fixed to the filter box inner wall bottom surface, and the first sleeve pipe and the second sleeve pipe correspond. The utility model discloses the structure design of first purification pipe and first sleeve pipe screw connection, second purification pipe and second sleeve pipe sliding fit, and cooperation limiting mechanism and locking mechanism can realize quick dismounting, when needing to replace filter core, first nut and first bolt in locking mechanism are loosened first, make the support of limiting mechanism slide on the guide rod, drive sealing sleeve and the second purification pipe connected therewith to remove to the direction away from first purification pipe, remove the adhering state of both, then rotate first purification pipe, make it from the thread connection of first sleeve pipe spin out, can take out first purification pipe and carry out filter core replacement, convenient to use.

This utility model relates to the field of electronic patch panel technology and discloses an electronic patch panel with dustproof function. It includes a patch panel body, a dustproof component on the side wall of the patch panel body, and a fixing component on the side wall of the patch panel body. The dustproof component includes a lower shell and an upper shell. The side wall of the upper shell is rotatably connected to the inside of the patch panel body, and the side wall of the lower shell is fixedly connected to the side wall of the patch panel body. A second fixing sleeve is fixedly connected to the side wall of the lower shell, and a first fixing sleeve is fixedly connected to the side wall of the upper shell. A first locking block is fixedly connected inside the first fixing sleeve. In this utility model, a torsion spring drives the upper shell and lower shell to fit tightly together, and a sealing block eliminates gaps. Simultaneously, a spring drives the second locking block to engage with the first locking block to achieve locking. The sealing gasket in the groove forms a wrapping seal for the cable. Pressing the push block releases the lock and opens the upper shell. This structure improves the dustproof reliability and ease of use of the equipment.

This application relates to the field of beer production technology, specifically a stable supply device for flavor lipid additives in beer production. This application achieves efficient filtration of flavor lipid additives by installing a vibration filtration mechanism within an internal filter box. This ensures the efficient addition of flavor lipid additives into the beer fermentation tank through vibration filtration, guaranteeing the flow rate of the additives through the filter box. Furthermore, by installing a buffer tank at the end of the delivery pipe on the metering pump, and a pressure applying mechanism on the buffer tank, residual flavor lipid additives in the buffer tank are electrically pressurized and fully discharged into the beer fermentation tank when the addition of flavor lipid additives is nearing completion. This ensures the accuracy of the added amount of flavor lipid additives and guarantees the final fermentation quality of the beer.

The invention relates to the technical field of computer 3D modeling, and discloses an urban three-dimensional terrain rapid modeling method and system based on AI point cloud semantic segmentation, and the method comprises the steps: carrying out the high-quality modeling of a feature object three-dimensional model in a target urban terrain according to an urban terrain semantic point cloud fusion preprocessing data set in cooperation with a point cloud three-dimensional modeling platform; precise modeling of the urban terrain in a finite point cloud data state is realized based on semantic segmentation and point cloud fusion; urban terrain three-dimensional model image information is accurately collected through a point cloud three-dimensional modeling platform and screenshot software, and urban terrain three-dimensional model modeling defect intelligent identification is carried out in combination with an AI algorithm and urban terrain feature object standard modeling defect image data; and based on the urban terrain three-dimensional model data and in cooperation with a point cloud three-dimensional modeling platform, performing dynamic and efficient repair and reconstruction processing on modeling defects of the urban terrain three-dimensional model, and realizing accurate modeling repair and reconstruction in an urban terrain finite point cloud data state based on model repair.

The utility model relates to the technical field of epoxy resin processing, in particular to a filter in an epoxy resin processing system, and solves the problems that in the prior art, when epoxy resin is treated by a filtering method, materials are generally directly poured on a filter plate for filtering, so that the operation is inconvenient, the materials are difficult to quickly filter, and the cost is high. And as the viscosity of the epoxy resin is relatively high, the filtering speed is slow, and the filtering efficiency of the material is greatly reduced. The filter in the epoxy resin processing system comprises a base, the top of the base is fixedly connected with a frame body, the inner side of the frame body is rotationally connected with a rotating pipe, and one side of the bottom of the base is fixedly connected with a driving motor through a bolt. According to the utility model, a rotary centrifugal filtration technology is adopted, and the bearing frame and the filter cylinder are driven to rotate through the rotating pipe, so that an epoxy resin material is more sufficiently stirred and dispersed in the filtration process, the material accumulation phenomenon is effectively avoided, and the filtration speed is obviously improved.

The utility model discloses a dust falling device, which relates to the related technical field of dust falling and comprises a filter box, a dust monitor is arranged at the bottom of the inner wall of the filter box, the outer wall of one side of the filter box is connected with one side of a control box, and a display screen is arranged on the other side of the control box. Protective covers which are symmetrically distributed are arranged at the top of the filter box, fan blades matched with the protective covers are arranged in the protective covers, the input ends of the fan blades are connected with one end of a transmission shaft matched with the fan blades, and an alternating current motor is arranged above the transmission shaft. According to the dust falling device, the dust concentration in air in the filter box can be detected through the dust monitor, the display screen can directly display detection data, the rotating speed of the alternating current motor is automatically adjusted according to the dust concentration in cooperation with the control box, the dust falling effect is guaranteed, meanwhile, energy consumption is reduced, and the operation cost is optimized; and the two alternating current motors operate to drive the two fan blades to operate, so that dust-containing air can be efficiently sucked into the equipment for treatment.

The utility model discloses filter cloth for sewage treatment, which comprises a main frame, one side of the main frame is of an open structure and is connected with a blocking frame, one end of the blocking frame is hinged with the main frame, the other end of the blocking frame is detachably connected with the main frame through a limiting assembly, and two pairs of auxiliary frames are longitudinally arranged in the main frame at intervals. Two pairs of auxiliary frames are longitudinally arranged in the main frame at intervals, coarse filter cloth, fine filter cloth, deep filter cloth and functional filter cloth are respectively arranged in the two pairs of auxiliary frames from top to bottom, and caulking grooves allowing the auxiliary frames to be embedded in a sliding mode are formed in the inner walls of the two sides of the main frame. The coarse filter cloth, the fine filter cloth, the deep filter cloth and the functional filter cloth are respectively mounted, so that multi-layer and all-directional efficient filtration of sewage is realized, and the sewage treatment effect is greatly improved.

This invention relates to an intelligent operation and maintenance method and device for an adaptive material suction system, comprising: Step 1, configuring the hardware of the material suction system; Step 2, adaptive material suction time parameters; Step 3, adaptive material cleaning time parameters; Step 4, self-diagnosis of material suction pump failure, pressure sensor failure, and pipe breakage in the front pipeline; Step 5, self-maintenance of material jamming on the material suction sealing plate, and self-diagnosis of material shortage and pipe breakage in the rear pipeline; Step 6, self-maintenance of filter element clogging by spray cleaning, and self-diagnosis of cleaning the filter barrel and replacing the filter element. This invention solves the high-frequency industry problem of "material suction failure" by adapting key parameters of the material suction and cleaning system, intelligent operation and maintenance of cleaning the material suction sealing plate and filter element clogging, and self-diagnosis of multiple faults such as the material suction pump, pressure sensor, and pipe breakage. It achieves zero user experience and zero operational requirements, extends the service life of core components such as the material suction pump, pipelines, and filter elements, reduces operating costs, and increases material suction capacity.

The utility model provides an ammonium sulfate drying system with a cloth bag dust removal device, which belongs to the technical field of ammonium sulfate production equipment and comprises a dust remover shell, a filter chamber and an ash hopper chamber are arranged in the dust remover shell, the ash hopper chamber is positioned at the bottom of the filter chamber and communicated with the filter chamber, and the dust remover shell is provided with an air inlet pipe and an air outlet pipe. One end of the gas inlet pipe is communicated with the lower area of the filter chamber, the other end of the gas inlet pipe is connected with a tail gas exhaust port of ammonium sulfate drying equipment, and the gas outlet pipe is communicated with the upper area of the filter chamber; the plurality of filter cloth bags are suspended in the filter chamber, and each filter cloth bag forms an interception filter structure and seals a tail gas circulation path from the lower area to the upper area of the filter chamber; the device has the beneficial effects that the cloth bag dust removal device can efficiently filter water vapor, gel dust and other substances in tail gas and capture ammonium sulfate particles, so that the wet smoke plume phenomenon is eliminated, and the tail gas generated in an ammonium sulfate working section meets the emission requirement.

The utility model relates to tunnel ventilation equipment technical field, and disclose a small radius spiral tunnel construction ventilation device, including ventilation pipeline main part, be provided with ventilation fan in ventilation pipeline main part, the side of ventilation fan is driven through the drive motor that is established and is driven, the side of ventilation fan is provided with dust filter assembly for filtering, the below of dust filter assembly is provided with dust collection assembly for dust collection, the utility model discloses the dust filter assembly is set up in ventilation pipeline main part, wherein the dust filter screen in dust filter assembly can filter dust in the airflow that is inhaled through the drive of ventilation fan, and the dust that falls into the bottom collecting bin is collected by the dust falling port, ensure that dust filter screen high -efficient filtration can avoid the dust after filtering again easily return to ventilation pipeline main part, and the safety and reliability are higher, and the use of the user is more convenient.