216 results about "Cyclonic separation" patented technology

The invention discloses a cyclone separation and moving particle bed coupled pulverized coal pyrolysis oil gas high-temperature dust removal system, and belongs to the technical field of coal clean utilization. The system comprises a cyclone separator, a fine filtration unit, a filter material cyclic regeneration unit and an intelligent control unit, the fine filtration unit comprises a particle bed, a particle bin is arranged at the top end of the particle bed, and a composite filter material layer is arranged on the particle bed; a dust-containing high-temperature oil gas pipeline and a pretreatment high-temperature oil gas pipeline are arranged at the top end of the cyclone separator, dust-containing high-temperature oil gas is introduced into the cyclone separator through the dust-containing high-temperature oil gas pipeline to be pretreated, and the pretreated dust-containing high-temperature oil gas is introduced into the particle bed through the pretreatment high-temperature oil gas pipeline to be finely filtered; and a coke breeze discharge pipe is arranged at the bottom of the cyclone separator. The invention is used for solving the technical problem of low gas-solid separation efficiency at high temperature caused by the adoption of a single filter material in the existing pulverized coal dust removal system.

The invention discloses a micro-scale turbine blade boundary layer heat-flow double-field synchronous test method and system. The test method comprises the steps that temperature field initial data and velocity field initial data are acquired; based on the initial data of the temperature field and the initial data of the velocity field, the distribution state of the microparticles in the boundary layer is diagnosed, and according to the diagnosis result, the optimal distribution of the microparticles in the boundary layer is obtained by feeding back and controlling the operation parameters of the reverse cyclone separation system; based on the optimal distribution, an improved PIV algorithm is adopted to calculate a boundary layer velocity field, and the improved PIV algorithm is obtained by introducing multistage grid adaptive encryption, physical constraint conditions and a transition area recognition mechanism into the PIV algorithm; a boundary layer temperature field reconstruction model is established, depth phase coupling is carried out on a temperature field reconstruction result and a boundary layer velocity field, synchronous analysis of heat-flow coupling behaviors in a turbine blade boundary layer is achieved, and finally a boundary layer coupling cloud picture reflecting heat-flow interaction characteristics is obtained.

The utility model belongs to the technical field of cleaning equipment, and particularly relates to a cyclone separation assembly, a dust collection device, cleaning equipment and a cleaning system, which can avoid the phenomenon that airflow possibly carries dirt to enter the space between the cyclone separation assembly and a dust collection cup to a certain extent. The cyclone separation assembly comprises a cyclone cylinder, the cyclone cylinder comprises a cyclone support, an air guide piece and a sealing piece, and the cyclone support is provided with an air inlet; the air guide piece is connected with the peripheral surface of the cyclone bracket; the sealing piece is connected with the peripheral surface of the cyclone bracket; the air guide piece is arranged between the air inlet and the sealing piece, and at least part of the sealing piece is elastic. The first sealing piece is in elastic contact with the dust collection cup, so that the peripheral face of the cyclone can make full contact with the inner wall of the dust collection cup, airflow is prevented from entering the space between the cyclone and the dust collection cup, dirt left in a gap is reduced, and normal operation of the cleaning equipment is guaranteed.

The utility model belongs to the technical field of cleaning equipment, and particularly relates to a cyclone separation assembly, a dust collection device, cleaning equipment and a cleaning system. The cyclone separation assembly comprises a cyclone cylinder and a cyclone cone, the cyclone cylinder comprises a cyclone support and an air inducing part connected with the cyclone support, and the cyclone support is provided with an air inlet; the cyclone cone is arranged in the cyclone bracket; the axis of the cyclone cone deviates from the axis of the cyclone support in the direction away from the air inducing part. According to the cleaning equipment, the air quantity passing through the air inducing part can be increased, the dust collection effect of the cleaning equipment is improved, the phenomenon that large-particle dirt is stuck at the air inducing part can be avoided to a certain extent, and it is guaranteed that the cleaning equipment can normally operate.

A high-salt steam purification device belongs to the technical field of sewage treatment, is used for mechanically separating, chemically washing and precisely filtering high-salt steam, and comprises a steam filtering device for separating and intercepting salt in the high-salt steam in a cyclone separation manner; the steam cleaning tower is connected with the steam filtering device and used for treating a gas phase after salt separation, and chemical washing of the gas phase is achieved; and the filter is connected with the steam cleaning tower and is used for separating and intercepting particulate matters in the chemically washed gas phase. Based on the purification device, the invention further provides a high-salt steam purification method. Through efficient purification, low-consumption circulation, intelligent control and anti-corrosion design, accurate removal of steam salt is achieved, the service life of key equipment core spare parts of the evaporative crystallization process in the sewage treatment industry is remarkably prolonged, the daily operation and maintenance cost of the equipment is reduced, and the economic benefit is increased. And a stable and reliable technical guarantee is provided for stable operation of core equipment in the sewage treatment industry.

The utility model discloses a cyclone separation assembly, a dust collection device, cleaning equipment and a cleaning system, and belongs to the technical field of cleaning equipment. The cyclone separation assembly comprises a cyclone cylinder, a dust box, a dust outlet door body and a limiting frame, the dust box communicates with the cyclone cylinder, and a dust outlet is formed in the dust box; the dust outlet door body is connected with the dust box and can open and close the dust outlet; the limiting frame is located in the dust box and limits the dust outlet door body to be opened towards the interior of the dust box. The dust outlet door body can be prevented from acting towards the inner wall of the cyclone cylinder, so that the dust outlet door body is closed at the dust outlet of the dust box, the risk that dirt is discharged from the dust box is reduced, and the cleaning effect of the whole machine is improved.

The invention discloses a wet-type cyclone separation dust removal device for dust removal under a mine, and relates to the technical field of cyclone separation dust removal devices, the wet-type cyclone separation dust removal device comprises a shell and a flow guide assembly, a dust removal cavity is formed in the middle of the shell, an air outlet pipe is arranged in the center of the shell, an air inlet is formed in one side of the dust removal cavity, and a push groove is formed in one side of the air inlet; the flow guide assembly is arranged on the upper portion of the dust removal cavity and comprises an outer ring, and the upper portion of the dust removal cavity is connected with the outer ring. When the device is used, the entering angle and the spiral track of airflow can be automatically adjusted according to the air inlet amount of the device so as to guarantee the dust removal effect, meanwhile, the water spraying amount can be automatically adjusted according to the air inlet amount, and water resources are reasonably used while the dust removal effect is guaranteed; and when the air inlet amount reaches the maximum, the air inlet can be cleaned, air flow entering the device can serve as power, water is pumped, a nozzle is cleaned regularly, and dust blockage is avoided.

When the equipment for improving the efficiency of the cyclone separator through two-way air extraction is used, air extraction is conducted through the air extraction device, external air enters the outlet air extraction ejector through the main air extraction pipeline, and air in the barrel is extracted to the outlet air extraction pipe through the annular gap between the outlet inner pipe and the outlet outer pipe; the air enters an outlet air exhaust ejector through an outlet air exhaust branch pipeline, external air and air in the barrel body enter a discharge port air exhaust ejector through a first connecting pipeline, and air in the middle ash hopper enters the discharge port air exhaust ejector through a discharge port; external air, gas in the barrel and gas in the middle ash hopper enter the stock bin through a second connecting pipeline and an air extractor, purified gas obtained after dust is completely removed through a dust remover is diffused to a centralized diffusion system through a total flow meter, and dust in the stock bin is discharged through a stock bin discharging valve. The secondary vortex can be inhibited and weakened, the cyclone separation efficiency is improved, and the running resistance is reduced.

This invention discloses a cyclone-spiral composite grading and cleaning device suitable for grain harvesting in hilly and mountainous areas. It includes a cyclone separator and a double-spiral surface separator. The cyclone separator includes a cyclone cylinder, with its inner cavity's suction port connected to a centrifugal fan. A feed pipe extending tangentially is provided on the outer side of the cylindrical section of the cyclone cylinder. Positive pressure air is introduced from the nozzle side, feeding the material along the feed pipe into the inner cavity of the cyclone cylinder. Several convex ridges are evenly distributed circumferentially on the upper section of the cylindrical wall of the cyclone cylinder's inner cavity. The double-spiral surface separator includes a spiral separation channel, which is divided into upper and lower spaces by a surface screen. The inlet end of the upper space is connected to an inlet channel section, which receives the material falling from the cyclone cylinder's outlet and guides it into the upper space. Advantages of this invention: The composite structure of "cyclone separation + double-spiral surface separation" improves the separation efficiency and accuracy of particles and impurities, resulting in less impurities, less loss, and good miniaturization and adaptability.

This disclosure provides a dust collection device and cleaning equipment, belonging to the field of cleaning equipment. The dust collection device includes a dust cup, a cyclone separator, a shielding member, and a drive motor. The cyclone separator is disposed within the dust cup and has a dust discharge side and a clean air discharge side arranged opposite each other along the axial direction of the cyclone separator. The cyclone separator includes multiple cyclone cones, each of which has an exhaust passage communicating with its interior and facing the clean air discharge side. The shielding member is rotatably disposed on the clean air discharge side of the cyclone separator and configured to selectively close at least a portion of the exhaust passage during rotation. The drive motor is disposed on the dust discharge side of the cyclone separator and is drively connected to the shielding member to drive the shielding member to rotate. The dust collection device and cleaning equipment provided by this disclosure can balance separation performance, flow capacity, structural compactness, and switching reliability.

A cyclone separation assembly comprises a cyclone cylinder. The cyclone cylinder comprises a cyclone holder, an air guide member, and a sealing member. The cyclone holder is provided with an air inlet. The air guide member is connected to the outer peripheral surface of the cyclone holder. The sealing member is connected to the outer peripheral surface of the cyclone holder. The air guide member is disposed between the air inlet and the sealing member. At least a portion of the sealing member is elastic.

A cyclonic separation system for a cleaning apparatus includes a suction source. A suction inlet is in fluid communication with the suction source for capturing debris matter. The recovery tank defines a collection chamber in fluid communication with the suction inlet and the suction source. A filter housing is disposed between the collection chamber and the suction source. A rotational deflection plate is operably coupled with the filter housing and disposed within the collection chamber. The suction source is configured to generate a cyclonic airflow within the collection chamber for separating the debris material from working air. The rotational deflection plate is configured to rotate about a central axis of the recovery tank in response to the cyclonic airflow.

The cyclone separation device of the circulating fluidized bed boiler comprises a separator body, a filter screen, a cleaning mechanism and a rotating mechanism, an air outlet pipe is arranged at the top of the separator body, the filter screen is connected into the air outlet pipe in a penetrating mode, the cleaning mechanism comprises a cleaning brush arranged at the bottom of the filter screen, and a rotating plate is arranged at the bottom of the cleaning brush. The rotating mechanism is used for rotating the cleaning brush; the cleaning brush is used for cleaning the filter screen; the rotating mechanism comprises a rotating shaft and a rotating motor. The rotating shaft is fixedly connected to the top of the rotating plate. Through the design of the filter screen, the cleaning brush, the rotating plate and the rotating mechanism, the arranged filter screen is annular and is fixedly connected into the air outlet pipe in a penetrating and inserting mode, the filter screen is used for blocking objects carried in wind and reducing discharged objects in the using process, and when the objects carried in the wind block the filter screen, the cleaning brush is used for cleaning the filter screen. And the rotating mechanism drives the rotating plate and the cleaning brush to clean the filter screen, so that the condition that gas cannot penetrate through the filter screen is avoided.

The utility model provides a counter flow cooling and cyclone separation integrated granulating device, which relates to the technical field of cooling and separating granulating devices, and comprises a workbench and a granulating machine arranged at the top of the workbench, a feed hopper is arranged at the top of the granulating machine, a discharge pipe is arranged at the bottom of the granulating machine, a granulating device is arranged in the granulating machine, and the counter flow cooling and cyclone separation integrated granulating device is arranged in the granulating machine. A stirring assembly is installed below the granulating device, an arc-shaped filter screen is installed in the granulator and located below the stirring assembly, and a conveying device is installed on one side of the granulator through a supporting frame. According to the device, through cooperative use of an arc-shaped scraper, an arc-shaped filter screen, a second connecting pipe, a conveying pipe, a first motor, a spiral conveying blade and a first connecting pipe, unqualified particles can be prevented from being mixed with qualified particles, the uniformity and consistency of final products are guaranteed, meanwhile, raw material waste is reduced, the treatment cost of the unqualified particles is reduced, and the production efficiency is improved. And the practicability of the product is further improved.

This invention provides an air supply and dust removal device for high-temperature corrosion prevention and control in coal-fired power plant boilers, comprising a cyclone separator and a microporous filter. The cyclone separator includes a separation shell, an air inlet, an exhaust outlet, and a first ash discharge outlet. The separation shell has a cylindrical separation chamber, and the air inlet, exhaust outlet, and first ash discharge outlet are respectively connected to the separation chamber. The air inlet is located at the upper part of the separation shell and is tangent to the outer wall of the separation shell. The exhaust outlet is located at the top of the separation shell, and the first ash discharge outlet is located at the bottom of the separation shell. The microporous filter includes a filter shell and a microporous filter element. The filter shell has an air inlet and an exhaust outlet, with the air inlet connected to the exhaust outlet. The microporous filter element is disposed inside the filter shell. The cyclone separator performs primary dust removal of large particles in the secondary air, and the microporous filter performs secondary dust removal of small particles in the secondary air, thereby achieving the removal of both large and small particles of dust in the secondary air.

The present application belongs to fluorine-containing sludge resource utilization field, disclose a kind of preparation process for preparing environmental protection double ash powder using fluorine-containing sludge, method includes fluorine-containing sludge, steel slag powder, silica ash are mixed, after mixing uniformly, carry out grinding homogenization treatment, after grinding, in temperature 50-65 ℃ saturated steam is carried out aging stuff 5~8h, the mixture after aging stuff treatment carries out flash evaporation drying, cyclone separation and is prepared into modified sludge powder, modified sludge powder is less than 15% through 45 μm square hole screen residue amount, modified sludge powder, fly ash, quicklime are mixed again according to proportion and are prepared into double ash powder.The beneficial effects of the present application are: the prepared double ash powder has low fluoride leaching rate, high compressive strength and is environmentally friendly.

The present application relates to the technical field of fuel cell, in particular to a hydrogen battery water-gas separation device for unmanned aerial vehicle, which comprises a separation shell, a cyclone separation cavity, a heat exchange condensation cavity and a hydrogen mixing cavity are sequentially arranged from bottom to top in the separation shell, a multi-stage separation and heat exchange combined structure is adopted, the technical problem that the traditional gas-liquid separator cannot completely remove the micron-sized droplets is solved, the efficient removal of liquid water droplets is realized through the cyclone separation cavity, the heat exchange between the new hydrogen and the wet hydrogen is carried out through the heat exchange condensation cavity, the residual droplets are fully condensed and precipitated, the mixed hydrogen gas with the required dryness is finally output, and the problem of fuel cell anode flooding is effectively avoided.

The cyclone separator comprises a cyclone separation shell, the cyclone separation shell is connected with a paint removal furnace through a waste gas conveying pipe, the ash bucket is arranged at the bottom of the cyclone separation shell, and the ash bucket is arranged on the cyclone separation shell. The air inlet port is obliquely distributed, the flow guide plate is of an arc-shaped structure, the flow guide plate is arranged at the position, close to the air inlet port, in the cyclone separation shell, and the cyclone separation assembly is arranged at the position, corresponding to the flow guide plate, in the cyclone separation shell. Waste gas is guided and circulated through the obliquely-distributed gas inlet port and the guide plate of the arc-shaped structure, the cyclone separation assembly is promoted to rotate, dust particles in the waste gas can be separated out through the separation groove and hit the guide plate and the inner wall of the cyclone separation shell, and the dust particles in the waste gas can be effectively separated and removed; dust particles are prevented from being carried during waste gas treatment and emission, and the environment is effectively protected.

The application discloses a kind of dry treatment desulfurization wastewater system and process flow, high-temperature hot flue gas of boiler induced draft fan outlet is used, dust removal is entered into evaporator coil heat exchange to realize brine concentration, and cooperate with damper to realize temperature rise in evaporator and reach crystallization temperature requirement, by concentrated liquid direct injection high-temperature air duct to carry out vapor-solid separation, then into dryer to carry out gas-solid high-temperature cyclone separation.The application is more reasonable in arrangement, has lower maintenance cost, has wider applicability in finished product production, has higher economic benefit, especially avoids chloride crystalline salt pollution ash, so that ash and chloride crystalline salt can be collected and utilized separately.

The utility model relates to a double-cyclone separator, which comprises a first cyclone separation mechanism and a second cyclone separation mechanism, the first cyclone separation mechanism comprises a first cyclone generation component arranged on a collecting barrel, and the first cyclone generation component is provided with a first air inlet and a first air outlet; the second cyclone separation mechanism comprises a second cyclone generation part and a second separation barrel, the second cyclone generation part is arranged on the second separation barrel, and a second air inlet and a second air outlet are formed in the second cyclone generation part; the first air outlet is formed in the center of the bottom of the first cyclone generating part and is communicated to the second air inlet; the second separation barrel is arranged on the first cyclone generating part, the bottom of the second separation barrel extends to the position below the first cyclone generating part, a discharging opening is formed in the bottom of the second separation barrel, and a blocking cover capable of being opened and closed is arranged at the discharging opening. According to the utility model, the overall volume is reduced, meanwhile, the power loss in a transmission pipeline is reduced, and the working efficiency is higher.

The disclosure provides a cyclone separation device, a dust cup and a cleaning equipment, and belongs to the technical field of cleaning equipment. The cyclone separation device comprises a cyclone separator and a second-stage dust bucket, the cyclone separator comprises a shell, and the second-stage dust bucket comprises a first cover body; the shell is provided with a groove, and the first cover body is provided with a protrusion matched with the groove; the groove comprises an embedding part extending in the axial direction of the flange and a fitting part extending in the circumferential direction of the flange from one side of the embedding part, and a limiting part for limiting the axial displacement of the first cover body relative to the shell is formed between the fitting part and the end face of the flange. The cyclone separation device, the dust cup and the cleaning equipment provided by the disclosure provide a detachable connection structure based on insertion and rotation, the structure design provides a simple detachable connection mode between the second-stage dust bucket and the cyclone separator, the user can complete assembly by pressing and rotating, and vice versa, which has the advantages of simple assembly and rapid disassembly.

The application discloses a negative pressure garbage conveying system, and belongs to the technical field of solid waste treatment equipment. The negative pressure garbage conveying system comprises a base frame, a cyclone separation conical tank fixedly installed on the base frame, a negative pressure pipeline structure arranged on one side of the base frame and in communication with a feeding port of the cyclone separation conical tank and a garbage bag breaking machine discharging port at two ends respectively, an exhaust pipe fixedly arranged on the top of the cyclone separation conical tank, and a filtering and deodorizing structure arranged on the exhaust pipe and used for deodorization and dust removal. The negative pressure garbage conveying system further comprises a driving structure arranged on the top of the cyclone separation conical tank and connected with the filtering and deodorizing structure, and a scraper fixedly installed on one side of an inner wall of the exhaust pipe. The negative pressure garbage conveying system can realize flexible and closed conveying of garbage to avoid material splashing and adapt to complex sites. Meanwhile, the cooperation of the filtering and deodorizing structure and the driving structure can prevent the diffusion of garbage odor gas, and the working environment is improved.

A multipurpose industrial dust collector comprises a dust collector body and a dust collecting box, the dust collecting box is mounted below the dust collector body, the cyclone separation dust collector is provided with at least two cyclone cylinders, each cyclone cylinder comprises an upper cylindrical cover body and a lower conical cylinder, and the lower end of each cylindrical cover body is fixedly connected with the upper end of the corresponding conical cylinder; an air inlet is formed in the circumferential side of the cylindrical cover body in the tangential direction, and an air outlet is formed in the top of the cylindrical cover body; a check valve is mounted on the inner side of a lower port of the conical cylinder, a dust falling port is formed between the check valve and the lower port of the conical cylinder and hermetically communicated with an inner cavity of the dust collecting box, and the check valve is fixedly connected with the conical cylinder; the air outlets and the air inlets of the multiple sets of cyclones are communicated in a sealed mode, the air inlet of the first set of cyclone serves as an external airflow inlet, and the air outlet of the tail set of cyclone is communicated with the air inlet of the electric fan. The multi-stage cyclone dust collector is wide in application, backflow blocking, multi-stage cyclone separation and filtering mechanism integration are equally combined for floating dust through the check valve, the height of the dust collector body is reduced, and the dust collection efficiency is improved.

Embodiments described herein relate to removal of aluminum impurities from battery waste. In some aspects, a method for removing aluminum impurities includes pre-processing an amount of battery waste to improve removal of aluminum impurities from the amount of battery waste. The method further includes removing at least a portion of the aluminum impurities from the amount of battery waste, modifying the removed aluminum impurities to form a coating precursor and / or a doping precursor, and applying the coating precursor and / or the doping precursor to an electrode material. In some embodiments, the method further includes characterizing the aluminum impurities in the amount of battery waste and regenerating the electrode material. In some embodiments, the removal may occur via screening, cyclonic separation, air separation, elutriation, and / or dissolution. In some embodiments, the doping precursor may include aluminum hydroxide (Al (OH) 3). In some embodiments, the regeneration includes applying a thermal treatment to the electrode material.

The present invention provides a dryer that does not require cleaning components, thereby reducing manufacturing costs, and that can remove dust from the dry air flowing through the air circulation path while preventing a decrease in drying efficiency. [Solution] The cyclone container 1, which constitutes the cyclone mechanism 10 of the dryer, has an inlet 3 into which dry air flows in from the air circulation passage 21a, a swirling section 4 that swirls the dry air around the discharge pipe 2, and a dust collection section 5 that is continuously provided above the swirling section 4 and collects dust in the swirled dry air. The dust collection section 5 is formed around the discharge pipe 2 and near the inner wall surface 1a of the cyclone container 1, and has a lint collection section 6 with a roughly U-shaped vertical cross-section and an opening 6a at the top.

This invention discloses a calcium formate drying device, a calcium formate production device, and their operating method, belonging to the field of calcium formate production technology. The calcium formate drying device includes a hot air duct and a normal temperature air duct, both equipped with cyclone separators. A screening device is connected to the outlet of the first cyclone separator, and the screening device is connected to the normal temperature air duct. The calcium formate production device includes a reaction system, a transfer tank, a centrifuge, a mother liquor system, a drying system, and a hot air system. The operating method of the calcium formate production device includes feeding calcium carbonate powder and formic acid into each reaction vessel for mixing and reaction; the reacted material is temporarily stored in the transfer tank, then pumped into the centrifuge for solid-liquid separation; the separated solid calcium formate is dried by the drying system; the separated mother liquor, after impurity removal, is partially reused in the reaction vessel, and the remainder is evaporated in an evaporation vessel. This invention features continuous production, thorough impurity removal, and good energy-saving effects.

The invention discloses high-salt heavy metal wastewater advanced treatment equipment and method based on gradient purification, and relates to the field of wastewater treatment.The high-salt heavy metal wastewater advanced treatment equipment comprises a cyclone separation module, a conditioning module, a desalting module and a heavy metal advanced removal module which are sequentially connected in the wastewater treatment flow direction; the cyclone separation module, the conditioning module, the desalting module and the heavy metal deep removal module are all borne by a rigid rack and packaged through detachable sealing cover plates so as to form the integrated treatment equipment connected in series according to the treatment gradient. According to the treatment equipment and method, four wastewater treatment processes of physical separation, chemical conditioning, electrochemical desalination and biological adsorption are subjected to modular integration and gradient series connection, a step-by-step purification scheme from macroscopic treatment to microscopic treatment and from coarse treatment to fine treatment is constructed, pollutants can be efficiently separated before entering a core membrane unit, and the treatment efficiency is improved. The impact of the high-salt heavy metal wastewater on the membrane separation unit is fundamentally reduced.

The application discloses an alumina production wastewater filtering equipment, which comprises a cyclone separator cylinder, a cyclone separation assembly is arranged in the cyclone separator cylinder, the cyclone separator cylinder is composed of an upper cylindrical section and a conical section, the cyclone separation assembly comprises upper spiral plates and lower spiral plates, the upper spiral plates and the lower spiral plates are fixedly connected to the inner side of the cyclone separator cylinder, a lap joint cylinder is arranged at the top of the cyclone separator cylinder, a water outlet inner cylinder is rotatably lap jointed on the lap joint cylinder, and the bottom of the water outlet inner cylinder extends to a demarcation line between the upper cylindrical section and the conical section; a gap knocking assembly is arranged on the outer side of the conical section of the cyclone separator cylinder; through the design of multistage spiral flow guide, optimized flow field, gap knocking, anti-blocking stirring and automatic slag discharge, the application can significantly improve the separation efficiency, effectively prevent the slag discharge port from being blocked, prolong the service life of the equipment, improve the automation degree and operation convenience of the equipment, reduce the production cost and ensure the continuity of production.

An apparatus for machining composite-material workpieces containing metal and non-metal has at least one machine which is used to machine the composite-material workpieces and which isolates shavings containing metal and non-metal or isolates other particles, and a suction and cleaning device for air contaminated with such particles. The suction and cleaning device has a fan and, arranged in fluidic sequence for multi-stage cleaning of the contaminated air, a cyclone separation stage, at least two mechanical filter stages and an activated carbon filter stage. The cyclone separation stage has a packet of at least three, preferably at least six, individual cyclones fluidically connected in parallel, which are arranged around a feed which supplies them via a distribution star. The individual cyclones have upwardly directed outlets for cleaned air; and above the outlets of the individual cyclones, a first of the mechanical filter stages is arranged engaging around the allocated feed.

This invention relates to the field of raw material impurity removal in cellulose-to-ethanol production, and discloses a method for removing impurities from raw materials in cellulose-to-ethanol production. The method includes: (1) passing the cellulose raw material through a first sieve with a mesh size of 0.2-1 cm and then performing air separation; wherein the suction velocity of the air separation is 10-20 m / s; (2) separating the air-separated raw material by cyclone separation and then pulverizing it until the proportion of raw material with a particle size of 2 cm < ≤ 5 cm is not less than 60 wt%, wherein the conditions for cyclone separation include: the inlet velocity of the cyclone separator is 10-20 m / s, a filter screen with a mesh size of 0.2-0.4 cm is installed at the upper outlet of the cyclone separator, and the outlet velocity of the upper outlet is 2-3 m / s lower than the inlet velocity of the cyclone separator; (3) passing the pulverized raw material through a second sieve with a mesh size of 0.2-0.8 cm for impurity removal. The raw material impurity removal method of this invention has a high impurity removal rate, reduces equipment wear and processing difficulty in subsequent processes, and increases the raw material conversion rate in cellulose-to-ethanol production.