124 results about "Dust emission" patented technology

The invention belongs to the technical field of pulse dust removers, and particularly relates to an intelligent pulse dust remover and a control method. The control method comprises the following parts and steps: S1, monitoring the dust emission concentration in real time through a dust concentration detection sensor, and controlling a system to correspondingly and automatically increase and decrease the rotating speed of a frequency conversion fan and the opening degree of an automatic air regulating valve according to the increase and decrease of the dust concentration; s2, dust is discharged through a frequency conversion fan after being filtered; s3, the resistance of the filter bag is monitored in real time through a pressure difference sensor, when the pressure difference reaches an ash removal threshold value, a control system is started for pulse ash removal, and the injection pressure is dynamically adjusted by adjusting an electric pressure adjusting valve according to the set pressure difference change rate; and S4, the control system automatically controls opening and closing of the star-shaped discharging valve. The system has the advantages of dynamic ash removal control, dynamic working condition adjustment, low operation energy consumption and the like.

The invention relates to the technical field of electric precipitation, in particular to overload monitoring equipment and a monitoring method for electric precipitation equipment, and the method comprises the following steps: acquiring target production data; determining a target dust discharge amount according to the target production data; and determining the target current magnitude according to the target dust discharge amount. The method has the advantages that the neural network is used for conducting deep learning on online collected production data, a corresponding relation model between the dust amount and the power plant production data is established, the smoke dust emission amount is predicted based on the model, the average secondary current amount of the electric field is adjusted in real time on the basis, and the purposes of reducing consumption and reducing power consumption are achieved. According to the invention, the control aims of improving the reliability of the IGBT and prolonging the service life of the IGBT are fulfilled, the spark discharge phenomenon can be reduced or avoided as much as possible, equipment such as the IGBT and a trigger circuit board can be better protected, and unnecessary electric energy consumption can be effectively reduced at the same time.

The utility model discloses a dust remover for feeding wire spheroidizing station relates to dust remover technical field, aiming at the low ash removal efficiency of the ash storage bucket of the dust remover for feeding wire spheroidizing station and the problem of incomplete cleaning of filter cartridge, present and propose the following technical scheme, it includes dust remover body, and the dust remover body is inside the setting and is inserted with the multiple groups filter cartridge that interpenetrates the slot, and the filter cartridge inside plug -in is connected with the multiple groups filter cartridge and is movably connected, and the filter cartridge side end is fixedly connected with the joint block, and the joint block side is provided with the rotary adjusting mechanism, and the dust remover body bottom both sides are fixedly connected with the conical ash outlet, and the conical ash outlet bottom is connected with the ash storage bucket, and the ash storage bucket is inside the setting and is provided with the ash unloading mechanism, and the dust remover body top is provided with the multiple groups high pressure air jet pipe, the utility model adds the vibrator, and optimizes the ash outlet, and introduces the rotary adjusting mechanism, and effectively improves the dust removal efficiency, reduces dust emission, and improves the working environment.

The utility model discloses a dry quenching coke loading system capable of reducing dust emission, which comprises a furnace cover opening and closing mechanism arranged on one side of a furnace mouth of a dry quenching furnace, a loading device for dry quenching, a tail coke hopper arranged on one side of the furnace mouth of the dry quenching furnace, and a movable coke tank suspended above the furnace mouth of the dry quenching furnace, two running rails are arranged on the two sides of a top port of the loading device side by side, a movable plate trailer is arranged on the two running rails, a movable motor is arranged on the movable plate trailer, walking wheels are arranged at the bottom of the movable plate trailer, and a cover plate used for shielding an upper port of the loading device is arranged on the front portion of the movable plate trailer. The cover plate is driven by the movable plate trailer to transversely move left and right along the running track, the upper layer of the cover plate is a metal plate, and the lower layer of the cover plate is provided with a high-temperature-resistant heat insulation material layer. Limiting switches are arranged at the two ends of the running track respectively. According to the utility model, the loading device is sealed after coke loading is finished, so that the dust removal effect is prevented from being influenced by the entrance of wild wind, and dust can be prevented from being dissipated.

The utility model relates to the technical field of planer type milling machines, in particular to a numerical control planer type milling machine capable of reducing milling dust emission, which comprises a planer type milling machine body, the planer type milling machine body comprises a spindle box body and a driving shaft body, and the outer side of the driving shaft body is sleeved with a connecting pipe body fixed on the lower plane of the spindle box body. The outer circle face of the connecting pipe body is connected with a rotary support, the lower plane of the rotary support is connected with an annular body, and a driving mechanism is installed on the spindle box body. The outer side of the driving shaft body is sleeved with a circular hollow shell, a plurality of dust collection holes are formed in the lower end face of the circular hollow shell at intervals, the upper end face of the circular hollow shell is connected with a dust collection pipe body, the upper end of the dust collection pipe body penetrates through the connecting pipe body and is connected with an external dust collector, and the lower plane of the annular body is connected with a telescopic connecting rod assembly. The lower end of the telescopic connecting rod assembly is connected with a strip-shaped brush. The dust removal device is reasonable in structure, and solves the problem that more rust and dust are easy to fly into air to cause pollution.

The application provides a soil erosion risk early warning method and device based on dust data, which comprises the following steps: performing grid processing and screening on a region to be analyzed to obtain an effective grid region; obtaining NDVI data and soil moisture data of the effective grid region; determining a slope length factor and a slope factor of each effective grid region; determining net dust data in the region to be analyzed by eliminating the influence of wind direction; determining a dust emission value of each effective grid region based on the NDVI data, the soil moisture data and the net dust data; calculating the NDVI data, the soil moisture data, the slope length factor, the slope factor and the dust emission value by using a neural network algorithm to determine a soil erosion intensity prediction value; combining the soil erosion intensity prediction value to determine a soil erosion value of each effective grid region; determining a soil erosion risk grid based on the current soil erosion value and historical soil erosion data, and performing risk early warning on the soil erosion risk grid.

The invention discloses a method for reducing flying dust in ceramic digital glue dry particle production, dust emission reduction and product performance improvement are realized through a multi-dimensional cooperative control technology, the core is to establish a particle size distribution-fluidity-flying dust suppression linkage control system, and a gradient dust removal system is synchronously developed. A high-frequency mechanical vibration device is arranged at the front section to remove large particles, a high-voltage electrostatic dust collection module is arranged at the middle section to capture suspended dust, a nanofiber membrane is adopted at the tail end for filtration, according to actual measurement, after transformation, the PM10 concentration of a production line is reduced to 3 mg / m < 3 > from 25 mg / m < 3 >, the equipment failure interval is prolonged to 1200 hours, the natural transition performance of dry particles is remarkably improved, the product superior rate is improved, and the production cost is reduced. In order to greatly reduce raised dust in the production process, the technology provides a solution for the generation of a large amount of dust in the production of ceramic digital dry granules.

The utility model relates to mining equipment dust removal technical field discloses a dust removal structure of mining screening machine, including the box, the box is arranged obliquely, one side of the box is equipped with first opening, the other side of the box is equipped with second opening, still include: support leg, four support legs are arranged respectively below the box, and can adjust the height of the box through height adjusting assembly set up on the support leg, dust removal structure, dust removal structure sets up at the top of the box, can carry out spraying dust removal operation directly to the first opening and the second opening of the box, the bottom of the box is equipped with the protective cover. The utility model has the advantages compared with prior art: adopt all -round covering type dust removal's mode, effectively prevented the dust emission of screening machine running process, and is equipped with spraying dust removal structure at the feeding and discharging of both sides, auxiliary further dust fall, improve the dust removal efficiency.

The utility model belongs to the technical field of dust removal of pelletizers, and particularly relates to a dust removal device of a pelletizer, which is characterized in that a mounting block is arranged on a base, a pelletizing cylinder is arranged on the mounting block, a pelletizing mold is arranged at the top end of the pelletizing cylinder, a gas collecting hood is arranged at the top end of the pelletizing cylinder, a first fan is arranged on the base, and a second fan is arranged on the base. An exhaust pipe is arranged on the first fan; a set of comprehensive multi-stage dust removal system is constructed, a gas collection hood is arranged at the top end of a granulation cylinder and matched with a first fan and an air purifier, a large amount of waste gas and dust generated in the granulation process can be collected and purified in time, meanwhile, a dust collection hood is arranged on a treatment cylinder and matched with a third fan and a dust collection box, dust generated in the treatment cylinder is collected and filtered, and the dust removal efficiency is improved. Compared with a traditional single dust removal mode, the multi-stage dust removal mode has the advantages that dust of different sources and different particle sizes can be more efficiently captured, the dust removal effect is remarkably improved, and pollution of dust emission to the environment is greatly reduced.

This invention provides a method and apparatus for dust suppression using a heavy-duty hammer discharge system. The method includes the following steps: First, a target dust accumulation amount is preset based on the ash hopper volume. Second, the dust accumulation state is monitored, and the actual dust accumulation amount at the time of the last actual operation of the discharge valve is recorded. The actual accumulation amount is compared with the target accumulation amount to obtain the deviation accumulation amount. Third, the counterweight parameters of the heavy hammer are adjusted according to the deviation accumulation amount to change the operating threshold of the discharge valve for the next actual operation. When the actual dust accumulation amount reaches the operating threshold of the discharge valve, the discharge valve opens, and the dust is discharged into the discharge channel. After discharge, the discharge valve closes. Fourth, the dust emission level is determined based on the deviation accumulation amount, and dust is vacuumed at the ash outlet according to the dust emission level during the discharge process. Fifth, the discharge channel is self-cleaned after vacuuming to remove dust adhering to the inner wall of the discharge channel. The heavy-duty hammer discharge system provided by this invention can improve the accuracy of the discharge timing.

The application discloses a kind of road construction site dust monitoring method and system, it is related to road construction site dust monitoring field, comprising: through the fixed dust monitoring point of fusing road construction drawing and field survey data layout, and based on fixed dust monitoring point coverage density calculation real-time identification monitoring blind area, when identifying monitoring blind area, trigger mobile dust monitoring point supplement;Through the traffic parameters such as synchronous acquisition vehicle flow, vehicle speed and dust concentration data, and establish time series correlation model to analyze traffic active state and dust concentration change trend, and then calculate and summarize dust production component, obtain regional dust production intensity, eliminate coverage blind area by dynamic monitoring point layout, establish the quantitative correlation of traffic parameters and dust Calculation of dust production intensity, effectively improve the comprehensiveness and control timeliness of road construction dust monitoring, guarantee the safety of construction area and surrounding environment.

The invention discloses a dust filtering device which is suitable for the field of industrial smoke dust emission treatment. Comprising a filter box, a filter element, a cooling assembly and a water cooling mechanism, and the cooling assembly treats flue gas through linkage of a drive, a valve and a protection mechanism in a smoke inlet cylinder. The driving mechanism adopts a dual-power motor to drive a suction fan, the suction efficiency is improved by a 30-degree attack angle of fan blades, the centrifugal mechanism mechanically expands along with power switching, and the linkage valve mechanism controls a liquid spraying device to secondarily cool and clean a filter element; and the water cooling mechanism is subjected to primary circulation cooling through the pre-embedded heat exchange pipe. The protection mechanism is provided with a cleaning mechanism, and driving power is utilized to drive a lead screw and a scraper blade to automatically discharge sewage through belt transmission. The problems that a filter element of a traditional device is prone to aging, complex in cleaning, poor in reliability and the like are solved, the device has the advantages of efficient filtering, intelligent cooling, automatic pollution discharge, reliable mechanical transmission and the like and is suitable for high-temperature and high-dust scenes, the service life of the filter element is prolonged, and operation and maintenance cost is reduced.

The invention provides a brine salt production system optimization technology innovation integration before drying of periodic drought and flood alternation type salt lake ecological management, belongs to the technical field of salt lake ecological management and resource comprehensive utilization, and particularly relates to a brine salt production system optimization technology innovation integration before drying of periodic drought and flood alternation type salt lakes by taking ecological management as a primary task and in a window period before drying of the periodic drought and flood alternation type salt lakes. Through digital regulation and control and multi-technology system optimization integration, the integrated system and method for reducing the source of salt-alkali dust storm, recovering high-value salt resources, realizing zero emission of old brine and quickly recovering an ecological base are realized. The integrated system has the following remarkable benefits: the ecological benefits are excellent: white tornado type salt-alkali dust storm formed after the periodic drought and flood alternating type salt lake is dried up is effectively eradicated, the discharge flux of the salt-alkali dust is reduced to be less than or equal to 5 mu gms, and the dust source reduction rate is gt; 92%; after treatment, the vegetation coverage rate of the lake basin is not less than 40% in one year and not less than 70% in three years. The recovery rate of NaSOis is not less than 90%, and the recovery rate of NaCl is not less than 85%.

The invention relates to the technical field of alternative fuel flying dust disposal, and discloses an alternative fuel dust collection system which comprises an air suction cover, the air suction cover is arranged above an equipment flying dust point in a covering mode, and a filtering assembly is arranged in the air suction cover in the airflow direction and used for adsorbing and filtering fiber dust; the air inlet end of the dust collector is connected with the air outlet of the air suction cover, and a first-stage filtering chamber and a second-stage filtering chamber which are transversely arranged side by side and are communicated with each other are arranged in the dust collector; and the exhaust fan is connected with the outlet end of the dust collector and is used for driving the dust-containing airflow to be discharged from the outlet end of the dust collector after being filtered by the air suction cover and the dust collector in sequence. The alternative fuel dust collection system can effectively filter sheet-shaped and strip-shaped large-particle dust and flying catkins at an alternative fuel dust raising point, and the operation load of downstream dust collection equipment is effectively reduced.

The invention relates to the technical field of calcined coke, and discloses a calcined coke multi-stage screening and dust recovery system which comprises a screening treatment module, a granularity regulation and control module, a dust capturing module, a circulating treatment module, an intelligent regulation and control module and an energy efficiency management module. Through the synergistic effect of the multi-stage vibrating screen unit and the particle size monitoring unit, material distribution data are collected in real time, screening parameters are dynamically adjusted, the adaptability to materials with different characteristics is guaranteed, meanwhile, through cooperation of the negative pressure dust collection unit and the multi-stage filtering unit, dust in different particle size ranges can be captured and treated in real time, and the efficiency is improved. The problem that the dust removal efficiency is reduced due to dust concentration fluctuation is effectively solved, it is guaranteed that dust emission continuously reaches the standard, the environmental protection performance of the system is improved, and the screening efficiency and the product quality stability are improved through an airflow backflow unit and a circulation rate control unit of the circulation treatment module.

The utility model discloses a dust absorbing device which is used for reducing dust emission in the production process, and relates to the technical field of air purification, the dust absorbing device comprises a pretreatment mechanism, an activated carbon adsorption mechanism and a spray tower, the pretreatment mechanism comprises a pretreatment box body, an upper cover and a filter screen cylinder, and the filter screen cylinder is installed in the pretreatment box body; an upper cover is installed on the upper portion of the pretreatment box body, a dust suction pipe is installed on the pretreatment box body, an air outlet of the pretreatment mechanism is connected with an air inlet of the activated carbon adsorption mechanism, an air outlet of the activated carbon adsorption mechanism is connected with an air inlet of the spray tower, and an air outlet of the activated carbon adsorption mechanism is connected with an air inlet of the spray tower. According to the utility model, the pretreatment mechanism and the activated carbon adsorption mechanism are arranged, and the pretreatment mechanism can be used for pre-filtering dust-containing gas and removing large particles in the dust-containing gas in advance, so that activated carbon is prevented from being polluted and blocked, and the adsorption efficiency and the service life of the activated carbon are ensured.

This utility model discloses a material guide trough for easy dust removal, relating to the field of dust removal and material conveying technology. The utility model includes a base plate, with a transmitter fixedly connected to the top outer wall of the base plate. A dust removal mechanism is provided on the top outer wall of the transmitter, including the material guide trough. This utility model incorporates a curved pipe. When the vacuum cleaner starts operating, the generated suction is transmitted through the transmission pipe into the curved pipe, and then through the curved pipe into the dust collection hood. The dust collection hood then sucks up the dust generated by the material being poured. The sucked-up dust then passes through the curved pipe and the transmission pipe back into the vacuum cleaner, and finally falls into a dust collection box for storage, facilitating subsequent unified cleaning of the collected dust. This achieves the effect of easy dust removal, effectively reducing dust emissions during material conveying, lowering the dust content in the workplace air, and improving the air quality of the workshop.

The application discloses a dust escaping and recycling system of a coking plant dust removal ash bin, relates to the technical field of industrial dust removal, and comprises a dust removal ash unloading room, an ash tank operation platform, a dust removal ash storage tank, a dust collection pipeline, an automatic sealing gate, a dust humidifying and stirring system, a dust removal butterfly valve, a fluid conveying control valve, a dust remover and a control device. A mounting hole corresponding to the dust removal ash storage tank is formed in the side wall of the dust removal ash unloading room, one end of the dust collection pipeline is arranged in the mounting hole, the other end of the dust collection pipeline is connected to the input end of the dust remover, the output end of the dust removal ash storage tank is connected to the input end of the dust humidifying and stirring system, a dust suction inlet is formed in one end of the dust collection pipeline located in the dust removal ash unloading room, the dust removal butterfly valve is arranged in the dust collection pipeline, and the automatic sealing gate is arranged at the entrance of the dust removal ash unloading room. Through the arrangement, dust pollution is significantly reduced, equipment corrosion is reduced, manual cleaning intensity is reduced, and the working environment is improved.

The utility model provides a tunnel ventilation device, which belongs to the technical field of tunnel construction and comprises a ventilation pipeline and a fan, the ventilation pipeline is arranged along the length extension direction of a tunnel, and the fan is arranged at one end of the ventilation pipeline extending out of the tunnel and used for introducing air into the ventilation pipeline; an airflow pressurizing section is arranged on the side, away from the draught fan, of the ventilation pipeline, and the diameter of the airflow pressurizing section is smaller than that of other positions of the ventilation pipeline. A telescopic section is arranged on the ventilation pipeline and is used for adjusting the length of the ventilation pipeline; the ventilation pipeline is communicated with humidifying equipment which is used for increasing the humidity of air introduced into the tunnel so as to reduce dust; the problems that in an existing tunnel ventilation mode, energy consumption is large, ventilation and construction progress are not matched, and dust emission is difficult are solved.

The invention relates to a method and a device for ascertaining fine dust emissions in the driving operation of a vehicle, in particular a motor vehicle. According to the invention, the device has a sensor system and a controller and the sensor system and the controller jointly assume the function of a fine dust sensor in the driving operation. Here, the sensor system senses driving operation values at the vehicle. The controller estimates the fine dust emissions from the tire wear of the vehicle from the sensed driving operation values and from an association of driving operation values and fine dust values which has been ascertained previously and stored in the controller. Finally, the invention relates to a vehicle with a device according to the invention.

A sand optimizer (100) is disclosed A vertical shaft impactor crusher (105) includes a crushing chamber (110) to process stone material. A rotor (105A) generates a hot airflow and directs an upward dust flow. An induced draft fan (125) extracts fine dust and circulates air stream. A cyclone assembly (130) collect fine dust and separate clean air. A second rotary air lock (135) prevents the air with dust emission and allow the fine dust to exit the cyclone assembly. An amibatic non-return air duct (140) prevents fine particles from entering a discharge air duct and direct the clean air into the vertical shaft impactor crusher. A third rotary air lock (145) allows a final product to exit. A bag filter (155) bypass excess air. A plurality of valves including a butterfly valve and pendulum valve. At least two hydraulic cylinders provide unidirectional force by converting hydraulic energy into mechanical energy.

The utility model belongs to the technical field of ceramic part accurate grinding, and particularly relates to a machining device for ceramic part accurate grinding, which comprises a supporting seat, a sealing box is fixedly mounted on the upper surface of the supporting seat, a switch door is hinged to one side of the outer wall of the sealing box, and a triangular chuck for clamping a ceramic part is rotatably connected to one side of the inner wall of the sealing box through a fixed shaft. A cleaning mechanism is arranged on the sealing box; by arranging the cleaning mechanism and the closed polishing environment, dissipation of dust is effectively reduced, so that health risks are reduced, the dust generated in the polishing process can be efficiently recycled through the dust collection opening and the dust collector, dust accumulation and environmental pollution are avoided, the dust can be stirred in the sealing box, and the polishing effect is improved. Therefore, the dust recovery efficiency is improved, and the dust recovery device has the remarkable advantages of reducing dust harm, improving the dust recovery efficiency, being easy and convenient to operate, convenient to maintain and the like.

The application discloses a production process of a road guardrail corrugated beam, which comprises the steps of laser cutting, high-temperature forming and quenching, cutting and trimming, surface treatment and laser punching, etc.; the application cancels the galvanizing process, can reduce the zinc consumption of each ton of product, avoids the discharge of galvanizing wastewater (containing heavy metals such as zinc and chromium), adopts dry operation in the ultrasonic shot blasting process, has no dust pollution, and reduces dust emission compared with the traditional sand blasting process. The thin design makes the weight of the corrugated beam per unit length lower, and the production and transportation costs are also significantly reduced, and the application is especially suitable for installation operation in mountainous areas; the anti-corrosion feature makes the corrugated beam directly used in harsh environments such as coastal salt mist areas and industrial acid rain areas, can replace the traditional stainless steel galvanized guardrail, and the application range is expanded to high-corrosion scenes which cannot be covered by the traditional process.

This utility model relates to the field of dust removal technology, specifically to a micro-powered dust removal device, including a support frame installed above a conveyor belt. A collection chamber is located at the lower part of the support frame, and a filter device is installed inside the collection chamber. The filter device is connected to a dust removal device. An mounting plate is installed above the filter device, and a control chamber is located above the mounting plate. A valve for controlling the connection between the control chamber and the collection chamber is installed inside the control chamber. A negative pressure fan is installed above the control chamber, enabling automatic dust removal. This eliminates the need for frequent manual cleaning of the filter element, significantly reducing operation frequency. During dust removal, the device does not need to stop and can continuously perform dust filtration, improving production efficiency. The collected dust can be directly recycled, avoiding resource waste and reducing dust emissions from polluting the environment.

This utility model relates to an activated coke material conveying and ash removal device, belonging to the technical field of conveying devices. It includes an outer chute connected between the material conveying hopper and buffer tank of a chain bucket elevator. An inner chute is installed inside the outer chute, with its inlet connected to the outlet of the conveying hopper. A grid is installed inside the outer chute, located below the outlet of the inner chute. An air inlet unit and a dust removal unit are provided on the outer chute; the air inlet unit is located below the grid, and the dust removal unit is located above the grid. An inspection port is provided on the outer chute, located above the grid, and a maintenance door is hinged to the inspection port. This invention is easy to operate and can effectively separate and remove fine particles and dust from activated coke materials, ensuring that the material particle size meets requirements, improving the adsorption capacity of the activated coke, and preventing excessive dust from entering the module's output hotspot and exceeding the outlet dust emission standard.

The utility model relates to a special tool for mounting a dust removal filter bag, which aims to solve the technical problems of dust emission and difficulty in mounting of the dust removal filter bag, and adopts the technical scheme that the special tool comprises a pneumatic reversing valve, a double-shaft double-acting stroke adjustable cylinder, a pneumatic clamp, two cylinders, a first clamp and two second clamps, the pneumatic reversing valve is fixedly arranged on the top face of the rear portion of the double-shaft double-acting-stroke-adjustable air cylinder, the pneumatic clamp is fixedly arranged on the bottom face of the middle of the double-shaft double-acting-stroke-adjustable air cylinder, the base is arranged at the front end of a cylinder barrel of the double-shaft double-acting-stroke-adjustable air cylinder, the two air cylinders are fixedly arranged on the bottom face of the base, and the first clamp is arranged at the front end of a piston rod of the double-shaft double-acting-stroke-adjustable air cylinder. The two second clamps are arranged at the ends of piston rods of the two air cylinders, and the pneumatic reversing valve is communicated with the double-shaft double-acting stroke adjustable air cylinder, the pneumatic clamps and the air cylinders through an air pipe four-way joint and an air pipe three-way joint. According to the utility model, the groove of the spring ring of the dust collecting bag can be exactly embedded into the inner edge of the tubesheet hole. The problems of air leakage and dust leakage are solved, and installation accuracy is improved.

The utility model discloses a friction device and a system for evaluating the dust emission amount of a floor material for a clean room, and belongs to the field of material performance testing. The friction device comprises a bottom plate; the four guide rods are vertically arranged on the upper surface of the bottom plate and are distributed in a rectangular array; the sample jacket is in sliding connection with the guide rod; the grinding assembly is arranged on the upper surface of the bottom plate and located in the inner space of the two sets of guide rods; the load assembly is arranged at the upper part of the sample jacket; when the friction device is not in the friction state of the to-be-tested sample, the sample jacket is higher than the grinding disc; and in the friction process, the sample jacket drives the to-be-tested sample to move downwards along the guide rod, and the to-be-tested sample is kept in contact with the grinding surface of the grinding disc. The utility model further provides a system which comprises the friction device and is used for evaluating the dust emission amount of the floor material for the clean room. The friction device is structurally designed, so that the quantity of particles generated in the friction process can be ensured, and the dispersion uniformity of the particles is improved.

The invention discloses raw material treatment equipment for graphite electrode production, and relates to the technical field of graphite electrode raw material treatment. According to the raw material treatment equipment for graphite electrode production, a special dust falling mechanism is arranged for the jaw type coarse crusher, a water source is driven by a first water pump to synchronously spray and atomize an inlet and an outlet of the jaw type coarse crusher after being shunted, and meanwhile, fine crushed materials are subjected to secondary dust falling washing by using a spraying branch pipe at an inlet of the ring hammer type fine crusher; dust suppression in the coarse crushing and fine crushing full-crushing links is achieved, dust dissipation is reduced from the source, the production operation environment is greatly improved, and meanwhile, loss of raw materials caused by dust loss is reduced; and after being filtered, the waste water is conveyed to the fine crushing unit for secondary spraying and dust falling, so that stepped cyclic utilization of the dust falling waste water is realized.

The invention belongs to the technical field of wet dust removal, and discloses a two-stage wet-type purification dust removal process flow, which comprises the following steps: a plurality of sections of dust suction hoods fully cover each dust raising point to collect wet dust gas; the dust collection pipeline is provided with a slurry discharge hole and is connected with a plurality of sections of dust collection hoods, so that deposited slurry in the dust collection pipeline automatically flows and is discharged; the wet type pre-dedusting device and the wet type dedusting gas washer are connected in series to carry out secondary wet type purification and filtration on wet dust gas; the clean water pipeline is used for supplying clean water to the wet-type pre-dust-removing device and the wet-type dust-removing gas washer; sewage generated by the two-stage dust removal equipment is temporarily stored in the sewage transfer box and is synchronously conveyed to the sewage reuse equipment system through the sewage pump so as to be consumed. The technological process is simple in structure, small in occupied area and suitable for small-site operation, through the two-stage wet-type purification and filtration dust removal process, the dust removal efficiency is improved, the dust concentration of exhausted gas is reduced, the national environment-friendly emission requirement is met, and the problems of sewage collection, emission and recycling in a traditional wet-type dust removal system are solved.

The utility model discloses a plate positioning and cutting device for lifting table production, and relates to the field of plate cutting and positioning, the plate positioning and cutting device comprises a base, a rectangular frame is integrally formed at the upper end of the base, a groove is formed in the rectangular frame, a dust suction port is formed in the center of the bottom of the groove, a dust suction pipe is fixedly mounted in the dust suction port, and the dust suction pipe is fixedly connected with the base. A dust collector is fixedly connected to the end, away from the dust collection opening, of the dust collection pipe, a double-shaft motor is fixedly installed in the center of the bottom of the base, third threaded rods are fixedly installed on an output shaft of the double-shaft motor, and threaded blocks are in threaded connection with the outer rings of the third threaded rods on the two sides; sliding rods are integrally formed on the two sides of the two threaded blocks. By the adoption of the structure, a worker starts the dust collector to effectively clean away chippings and powder gathered in the rectangular frame, dust can be effectively sucked away under the work of the dust collector, and the situation that cutting dust is diffused into air is effectively reduced.