EP3292912A1 - Procédé de fonctionnement d'un multicyclone pour la séparation de grains fins et ultrafins ainsi que multicyclones - Google Patents

Procédé de fonctionnement d'un multicyclone pour la séparation de grains fins et ultrafins ainsi que multicyclones Download PDF

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Publication number
EP3292912A1
EP3292912A1 EP16188007.5A EP16188007A EP3292912A1 EP 3292912 A1 EP3292912 A1 EP 3292912A1 EP 16188007 A EP16188007 A EP 16188007A EP 3292912 A1 EP3292912 A1 EP 3292912A1
Authority
EP
European Patent Office
Prior art keywords
carrier gas
cyclone
multicyclone
fine
individual cyclones
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16188007.5A
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German (de)
English (en)
Other versions
EP3292912B1 (fr
Inventor
Holger Wulfert
André BÄTZ
Winfried Ruhkamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Loesche GmbH
Original Assignee
Loesche GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP16188007.5A priority Critical patent/EP3292912B1/fr
Application filed by Loesche GmbH filed Critical Loesche GmbH
Priority to CN201780008607.6A priority patent/CN109641217B/zh
Priority to CA3007583A priority patent/CA3007583A1/fr
Priority to PCT/EP2017/072546 priority patent/WO2018046640A1/fr
Priority to US16/067,373 priority patent/US10926270B2/en
Priority to JP2018531546A priority patent/JP6934871B2/ja
Priority to SG11201804823RA priority patent/SG11201804823RA/en
Priority to EA201800353A priority patent/EA034688B1/ru
Publication of EP3292912A1 publication Critical patent/EP3292912A1/fr
Application granted granted Critical
Publication of EP3292912B1 publication Critical patent/EP3292912B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/007—Mills with rollers pressed against a rotary horizontal disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/26—Passing gas through crushing or disintegrating zone characterised by point of gas entry or exit or by gas flow path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/185—Dust collectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof
    • B04C5/28—Multiple arrangement thereof for parallel flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/002—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external filters

Definitions

  • the invention relates to a method for operating a multi-cyclone for separating fine and ultrafine particles and a multi-cyclone.
  • the individual cyclones are housed together in a false low-entry housing, in which an upper and a lower chamber is formed.
  • the carrier gas outlet openings of the individual cyclones are designed to be open towards the upper chamber and the upper chamber has a total carrier gas outlet opening. This serves to discharge the carrier gas, which has escaped from the respective carrier gas outlet openings of the individual cyclones into the upper chamber, via the carrier gas total outlet opening out of the housing of the multicyclone.
  • the semolina discharge openings of the individual cyclones are open towards the lower chamber.
  • the lower chamber has a device for false low-entry removal of registered by the semen outlet openings Zyklongr made.
  • a common cyclone air supply is provided to the lower chamber.
  • Single cyclones are also referred to as centrifugal separators. They serve, for example, as so-called Massenkraftabscheider in process engineering plants for separating solid particles from gases. For example, they are used for emission control.
  • the goal is to clean by means of the cyclone, the carrier gas, which transports the particles in the cyclone as completely as possible, that is, to clean to a very high degree of purity of particles and again from the Zyk-Ion dissipate. Ideally, a degree of purification of over 99% is achieved depending on the particle size and mass.
  • Essential components of a centrifugal separator are an upper inlet cylinder, a conical extension of this cylinder and a dip tube.
  • a cyclone works as follows. In the inlet cylinder carrier gas is injected tangentially with the particles to be separated, so that it describes a circular path. The particles in the carrier gas are conducted by their centrifugal force to the wall of the cylindrical portion and braked in the subsequent conical region, in particular on the conical walls, so that they fall out of the carrier gas flow and leave the cyclone down. The thus purified carrier gas exits through the dip tube, which extends in the interior of the inlet cylinder and the subsequent cone again from the cyclone.
  • a cyclone can also be used for separating or classifying fine particles.
  • the separation properties of the cyclone can be partially influenced by the inflow velocity of the carrier gas stream into a cyclone.
  • the carrier gas flow or process gas flow often due to other devices installed in such systems equipment can not be influenced arbitrarily, such a scheme has not always proven to be optimal feasible.
  • the invention is therefore based on the object to provide a simple and efficient method for operating a multi-cyclone for separating fine and very fine grain and a multi-cyclone.
  • This object is achieved by a method for operating a multi-cyclone for separating fine and ultrafine particles with the features of claim 1 and by a multi-cyclone with the features of claim 8.
  • the carrier gas inlet openings each have a volume-identical carrier gas stream from outside the housing is fed with the fine and ultrafine particles to be separated as particles.
  • an at least proportionate separation of fine and finest grain is carried out, wherein the fine grain enters as Zyklongr imagine on the Gr manaustragsö réelleen in the lower chamber and is withdrawn from there via the device for false feeder low-extraction from the housing.
  • the ultrafine grain is passed as Zyklonfeingut means of the carrier gas flow through the upper chamber and the carrier gas outlet opening from the multicyclone.
  • the quantity, the fineness and / or the purity of the ultrafine grain guided from the multicyclone is adjusted by means of a regulation of the amount of the cyclone control air supplied by the cyclone air supply into the lower chamber per unit time.
  • False-air entry or low-false-low or even low-level in the sense of the invention can be understood in such a way that hardly or ideally no air or gas can penetrate into the multicyclone from outside the multicyclone.
  • a complete prevention of the ingress of false air or false air is not possible in real circumstances or only with unreasonable effort.
  • the main reason for the entry of incorrect air in the multi-cyclone is the facility for false-low-fume extraction of discharged through the Grellotragsö Samuelen Zyklongrillone.
  • Such a device can be realized for example as a rotary valve.
  • Rotary valves which meet the requirements of the invention described herein, for example, have a gap width of about 0.3 mm.
  • carrier gas flow is used.
  • this may be a gas or air flow with which the particles to be separated, which are referred to as fine and ultrafine particles, are transported.
  • any desired gas or gas mixture can be used for this purpose. It may be, for example, ambient air, oxygen-depleted process gas or the like.
  • a basic idea of the invention can be seen in providing the individual cyclones provided in the multi-cyclone with a carrier gas flow of the same volume. This has the consequence that the individual cyclones have substantially the same separation characteristics between fine and very fine grain, whereby a regulation of this separation limit is significantly simplified over the entire multi-cyclone.
  • cyclone control air as a controlled variable for the separation limit, that is used in particular for the amount, fineness and / or purity of the finest grain becomes.
  • a simple control is also given by the fact that the cyclone control air is not supplied to each individual cyclone separately, but a common single supply of cyclone control air to the lower chamber of the multi-cyclone is provided. Of course, could also be provided by design several supplies in the lower chamber. However, it is essential here that the supply and thus also the regulation of the cyclone control air takes place in the lower chamber and not in each individual cyclone itself and directly.
  • volume per unit time of the volume-identical carrier gas streams is adjusted to the individual cyclones depending on the geometry of the individual cyclones used to deposit as closed cyclone air supply about 99% of the fine and very fine grain located in the carrier gas streams as Zyklongrit. It has been found that such a set ground state can be regulated or controlled particularly efficiently and effectively by means of the supply of cyclone control air. This results from the fact that the individual cyclones of the multi-cyclone are operated in this basic state so that they allow the most complete separation of fine and finest grain.
  • this separation can be impaired by supplying cyclone control air, so that the goal is achieved to remove a portion of the particles present in the carrier gas stream as ultrafine particles from the multicyclone by means of the total carrier gas outlet stream and feed it to a subsequent separation.
  • the loading of the volume-identical carrier gas streams with particles which can be deposited as fine and ultrafine particles is also a relevant variable for setting a stable ground state.
  • the loading can be specified as grams of dust particles per cubic meter of carrier gas or as kilograms of dust particles per kilogram of carrier gas.
  • the setting of a load that meets the conditions specified above, is preferred because at a high load already in principle no 99% separation of fine and very fine grain as Zyklongrello is possible, and thus the control over cyclone control air is difficult.
  • the loading should be optimally optimized as far as possible, since it has a significant influence on the efficiency of the multi-cyclone. This means that the closer the load is to the optimum, that is to say a 99% separation without the supply of cyclone air, the greater the throughput can be achieved with such a multi-cyclone.
  • a pressure difference between the upper and the lower chamber is adjusted and the pressure in the upper chamber is lower than the pressure in the lower chamber.
  • This can be achieved, for example, by means of a sucking blower after the multicyclone, so that a pressure gradient occurs throughout the multicyclone.
  • the static pressure in the upper chamber is lower than in the lower chamber.
  • the pressure in the upper chamber and in the lower chamber is set lower than the ambient pressure. This ensures that the cyclone control air does not have to be blown into the multicyclone itself, but is sucked into it.
  • Such a method facilitates the construction and operation of a multi-cyclone, since it is necessary for the process either to actively inject the carrier gas streams into the multicyclone or, as is preferred, to suck it through the multicyclone via a blower.
  • the fine and finest particles to be separated can be fed directly into a carrier gas stream. It is advantageous, however, if the fine and ultrafine particles to be separated are supplied to a dispersing unit by means of the carrier gas before being fed into the multicyclone, and from there transported by means of the carrier gas flow to the multicyclone. Such a method is particularly advantageous if the fine and very fine grain is not fed directly from an upstream process via the carrier gas stream, but from a storage location such as a bunker. By using a dispersion unit is achieved that the fine and very fine grain is distributed as homogeneously as possible in the carrier gas stream and hardly adhere particles to each other. This positively influences the result of the separation in the multicyclone.
  • the finest grain, which is discharged from the multicyclone by means of the carrier gas exit stream can be separated in any manner from the carrier gas stream. It is advantageous if this is carried out by means of a filter.
  • a filter in this case, for example, a bag filter or cartridge filter can be used.
  • the method according to the invention can advantageously be applied to a multi-cyclone with a plurality of essentially identically constructed individual cyclones.
  • These individual cyclones each have a carrier gas inlet opening, a carrier gas outlet opening and a semolina discharge opening.
  • the individual cyclones are housed together in a false low-entry housing, in which an upper and a lower chamber is formed.
  • the carrier gas outlet openings of the individual cyclones are designed to open towards the upper chamber.
  • This upper chamber has a total carrier gas outlet opening in order to discharge the carrier gas, which enters from the respective carrier gas outlet openings of the individual cyclones into the upper chamber, out of the housing of the multicyclone via this total carrier gas outlet opening.
  • the Gr dirtyaustragsö Maschinenen the individual cyclones are each open to the lower chamber formed, the lower chamber has a device for false feeder low-extraction of registered by the Gr manaustragsö réelle cyclone.
  • the carrier gas inlet openings are designed such that they can be acted upon from outside the housing of the multi-cyclone with a volume-identical carrier gas stream and are not fluidly connected to the upper or the lower chamber.
  • a common Zyklonregel Kunststoffzu operation is provided, via which targeted cyclone control air can be conducted into the lower chamber.
  • a control and regulating device is provided and arranged to adjust by means of the amount of cyclone control air per unit time, the amount, the fineness and / or the purity of the guided from the multicyclone Feinstkorns.
  • the overall construction of the multi-cyclone is such that there is a common cyclone air supply to all the individual cyclones. This means that only one feed, which leads centrally into the lower chamber, must be adjusted and / or regulated in order to influence the above-mentioned properties of the ultrafine grain.
  • the individual cyclones are fluidly connected via their Gr manaustragsö réelleen with the lower chamber.
  • the vortex sink which is formed in each of the individual cyclones, and is significantly responsible for the selectivity or other separation properties in a cyclone, influenced.
  • An advantage of such a design is that the carrier gas flow, which is supplied to the individual cyclones, does not have to be modified or influenced here. This means that the multicyclone is set once in operation to an ideally optimal operating point and then the separation properties only need to be varied and readjusted via the amount of supplied cyclone air per unit time.
  • the construction of the multicyclone according to the invention has the advantage that the multicyclone can in principle be adjusted in an optimal operating point with respect to the amount of the incoming carrier gas and its loading and thus can be operated in an efficient manner.
  • the individual cyclones can be arranged as desired in the multi-cyclone.
  • the individual cyclones are fluidically provided in parallel in the housing. This means that they all have a respective individual carrier gas inlet opening which is supplied with particle-laden carrier gas from outside the multicyclone.
  • the upper and the lower chamber are formed airtight to each other, wherein an exchange of air between the upper and the lower chamber takes place substantially only via the individual cyclones.
  • Air-tight in this sense means that an air exchange between the two chambers can take place exclusively via or through the individual cyclones, so that no direct exchange of air between these two chambers is provided.
  • the airtight separation of the The upper and lower chambers have the consequence that the cyclone control air can only flow into the individual chambers via the seminal outlet openings of the individual cyclones and into the upper chamber via the carrier gas outlet openings. With such a construction it is achieved that the introduced into the lower chamber cyclone control air flows completely through the individual cyclones and thus fully used to control the separation between fine and finest grain.
  • a multicyclone according to the invention may preferably be used or incorporated in the context of a very fine grain separator for separating fine and ultrafine particles from a preliminary or intermediate product.
  • a Feinstkornabscheider has in addition to a multi-cyclone according to the invention a switched after or downstream of the multi-cyclone filter.
  • the precursor or intermediate product is fed by means of a carrier gas stream at least one multicyclone.
  • the fine grain can be separated as a cyclone grit.
  • the ultrafine grain which is still present in the carrier gas stream, is passed on to the filter, in which it can be separated off.
  • Such a Feinstkornabscheider makes it possible in a simple manner to further treat the emerging from the multicyclone carrier gas stream in which the non-separated in the cyclones Feinstkorn is present, so that the finest grain can be obtained from the carrier gas stream, and the carrier gas stream itself either the Re-fed or discharged into the environment.
  • the respective individual cyclones of the plurality of multicyclones are each provided with a smaller diameter in the flow direction of the carrier gas flow.
  • a plurality of multicyclones may be arranged in cascading fashion in front of the filter, the diameter of the individual cyclones becoming smaller as the multicyclone is arranged closer to the filter in the flow direction.
  • the diameter of a single cyclone is significantly responsible for the possibilities for setting the cut-off.
  • the smaller the diameter the farther the separation limit between fine and very fine grain can be shifted in the direction of very fine grain or smaller diameter, so that the finest grain is finer. It is with such a cascading arrangement of multiple multicyclones thus possible to produce different fractions of fine or very fine grain with a Feinstkornabscheider.
  • the precursor or intermediate product can be fed directly to the ultrafine grain separator from a process engineering plant, for example a grinding process.
  • a process engineering plant for example a grinding process.
  • the volumes of carrier gas streams are often defined based on the upstream process, it is not easy to operate the multicyclone at an efficient operating point.
  • a storage bunker for the precursor and intermediate product as well as a dispersion unit is provided in front of the one or more multicyclones of the ultrafine grain separator.
  • the precursor or intermediate product to be separated is fed from the storage bin via the dispersion unit to the ultrafine grain separator by means of the carrier gas stream.
  • the Feinstkornabscheider can also be used in a grinding plant for the production of fine and ultrafine grain from a raw material.
  • a grinding plant has a mill-sifter combination which has a sifter and a mill.
  • the mill-sifter combination is designed to feed at least once shredded raw material from the sifter of the mill-sifter combination as dismissed coarse material of the mill again for further comminution at a first sighting.
  • a Mahlanlagenfilter is provided.
  • a grinding agent carrier gas stream not shredded ground material is transported by the classifier of the mill-sifter combination to the grinding plant filter and there separated from the grinding plant carrier gas stream.
  • the comminuted regrind deposited on the grinding plant filter is fed to the ultrafine grain separator where it is separated into fine and ultrafine particles.
  • Fig. 1 is a schematic representation of a multi-cyclone 1 according to the invention shown.
  • the multi-cyclone 1 are in a housing 3 a plurality, in the illustrated embodiment, six times six, ie 36, identical individual cyclones 10 are arranged.
  • Fig. 1 only six single cyclones 10 are visible.
  • the further individual cyclones 10 are located in the depth direction of the sketch.
  • the individual cyclones 10 are used in a square arrangement.
  • the individual cyclones 10 are of essentially identical construction and each have a carrier gas inlet opening 11, a carrier gas outlet opening 12 and a Gr manaustragsö réelle 13 on.
  • the housing 3 is subdivided into an upper chamber 5 and into a lower chamber 6.
  • the individual individual cyclones 10 are each arranged between the upper chamber 5 and the lower chamber 6.
  • the carrier gas inlet openings 11 of the individual cyclones 10 are designed such that they can be operated with a carrier gas stream from outside the housing 3.
  • the supply of the carrier gas into the carrier gas inlet openings 11 of the individual cyclones 10 takes place here directly from outside the housing 3, so that the carrier gas does not first penetrate into the upper chamber 5 or lower chamber 6.
  • Each individual cyclone 10 is fluidly connected via its carrier gas outlet opening 12 with the upper chamber 5.
  • each individual cyclone 10 is fluidly connected via its Gr manaustragsö réelle 13 with the lower chamber 6.
  • the upper chamber 5 has a total carrier gas outlet opening 7, via the carrier gas, which enters from the carrier gas outlet openings 12 of the individual cyclones 10 in the upper chamber 5, can escape from this.
  • a device for false or false low-extraction of Zyklongrie 22 is provided.
  • This device can be designed, for example, as a rotary valve 8, so that the Zyklongr mane can be discharged from the lower chamber 6 without larger amounts of air can enter the lower chamber 6.
  • a cyclone air supply 9 is provided in the lower chamber 6. Air or gas can be directed into the lower chamber 6 selectively via this cyclone air supply 9.
  • a volume flow measurement 62 and a control flap 61 is mounted in front of the cyclone air supply 9, whereby the volume or the amount of introduced into the lower chamber 6 Zyklonregel Kunststoff can be varied and adjusted.
  • the multicyclone 1 is not used, as conventionally used, for purifying an air or gas stream of particles, but instead as a targeted separation unit of particles which are present within a carrier gas stream.
  • a carrier gas stream is directed into the individual cyclones 10, which are in each case fluidically parallel, that is, alongside and behind one another, with a corresponding particle charge.
  • the deposition of the particles essentially takes place in that the carrier gas located on a circular path is further accelerated by the geometry of the cyclone with the particles, so that the particles escape from the accelerated carrier gas flow due to centrifugal force and gravity fall down over the semolina discharge opening 13.
  • the carrier gas purified in this way can then emerge from the single cyclone 10 via an immersion tube provided, as already described, and via the carrier gas outlet opening 12.
  • the flow conditions occurring within a single cyclone 10 are also referred to as vortex sinks. If this vortex sink is disturbed, for example by cyclone air which flows into the single cyclone 10 via the semolina discharge openings 13, the flow velocity of the carrier gas in the single cyclone 10 changes, so that even lighter particles, which are referred to herein as ultrafine particles, pass out of the single cyclone via the immersion tube 10 can emerge and not as Zyklongr imagine on the Gr manaustragsö réelle 13 are deposited.
  • the mass flow distribution between fines discharged from the multicyclone and fines deposited as cyclone grits in the multicyclone can be adjusted by means of the cyclone control air.
  • approximately 100%, more precisely about 99%, of the particles in the carrier gas stream with completely closed cyclone air supply 9 are deposited as cyclone semolina in the multicyclone 1.
  • the D50 value describes the particle size distribution for a grain distribution in which 50% by mass is greater and 50% by mass is smaller than the specified diameter of the marginal grain. In particular, with the subtleties herein, it has been found that this size is better suited than the usual Blaine specific surface.
  • Fig. 2 the multi-cyclone 1 according to the invention is shown in the context of a Feinstkornabscheiders 40.
  • the Feinstkornabscheider 40 has as essential elements a storage bunker 42 for a preliminary or intermediate product to be separated.
  • a dispersion unit 20 is provided in order to be able to distribute the precursor or intermediate product to be separated as homogeneously as possible in a carrier air stream.
  • an inventive multicyclone 1 is used, at which downstream of a filter 30, which is preferably designed as a bag filter, connects.
  • the pre-product or intermediate product stored in the bunker 42 is fed via a rotary valve 43 to a variable-speed feed screw 44, which feeds the pre-intermediate or intermediate product to the dispersion unit 20.
  • a rotary valve 43 to a variable-speed feed screw 44, which feeds the pre-intermediate or intermediate product to the dispersion unit 20.
  • the removal from the bunker and the feeding to the dispersion unit 20 can also be achieved by other means.
  • the dispersion unit 20 serves to distribute the product to be separated as homogeneously as possible in a carrier gas stream. This is exemplified in the Fig. 2 Described schematically dispersing unit 20, wherein also differently constructed dispersing units can be used.
  • a fan 45 For generating the carrier gas stream, in which the precursor and intermediate product is introduced, downstream of the filter 30, a fan 45 is provided with appropriate control. This blower 45 sucks the carrier gas through the filter 30, the multicyclone 1 and the dispersion unit 20.
  • the dispersion unit 20 itself has a distributor plate 22, a blade ring 24, turbulence inserts 25 and a displacement body 26.
  • the pre-product or intermediate product supplied via the feed screw 44 of the dispersion unit 20 falls onto the distributor plate 22.
  • the distributor plate 22 rotates so that the pre-product or intermediate product that is fed in laterally slides off the distributor plate 22 or is thrown to a wall of the dispersion unit 20. It is therefore torn apart mechanically and distributed to a larger flow cross-section.
  • the precursor or intermediate product to be separated is entrained by the carrier gas stream.
  • the intermediate or intermediate product is thus torn further apart, in this case pneumatically.
  • turbulence build-up 25 are provided in the flow direction of the carrier gas, which achieve additional turbulence and thus better dispersion of the intermediate and intermediate product to be separated.
  • the turbulence inserts 25 may be formed, for example, by means of static mixing elements or impact bodies.
  • a dynamic rotor which further improves the thorough mixing and dispersion of the precursor or intermediate product. This is additionally improved by the displacement body 26, which can be designed adjustable in height.
  • the precursor or intermediate product to be separated is passed to the multicyclone 1 according to the invention by means of the carrier gas stream.
  • This will, as already in relation to Fig. 1 explained, regulated in the ground state with respect to the loading of the carrier gas stream, which is adjusted by means of the supply from the bunker 42, and the volume per unit time of the carrier gas stream, which is adjusted via the fan 45, is operated in such a way that in the initial state almost complete separation of the fine and finest grain in the multi-cyclone 1 is possible.
  • a worse deposition is achieved, so that the finer particles are not deposited in the carrier gas stream as Zyklongr imagine, but are directed with the carrier gas flow towards the filter 30.
  • the finest particles are deposited and can be removed from the filter 30, for example via a rotary valve 31.
  • the thus purified carrier gas stream can be partially re-supplied to the process or blown into the environment.
  • An advantage of the Feinstkornabscheider 40 described here is that it can be operated independently of upstream processes that produce the precursor or intermediate always in the range of an optimal operating point, since both the load and the volume per unit time of the carrier gas only by the properties the individual modules of the Feinstkornabscheiders 40 are defined and not on upstream or downstream other processes must be taken into account.
  • a grinding plant 50 is shown with a mill-classifier combination 51.
  • the mill-sizer combination comprises a mill 52 and a sifter 53.
  • the grinding stock comminuted in the mill-classifier combination 51 is transported to a grinding plant filter 55 by means of a mahialia carrier gas stream, which is adjusted by the mill blower 56.
  • the grinding plant carrier gas stream can be partially recycled via a hot gas generator 57, which allows, for example, a mill drying in the mill separator combination.
  • conventional grinding plants 50 as in Fig. 3
  • a loading of the carrier gas in the range from 30 g / m 3 to 50 g / m 3 at a fineness of up to 6000 cm 2 / g is usually shown.
  • an inventive multicyclone 1 and thus also the Feinstkornabscheider 40 can be operated with a loading in the range between 200 g / m 3 to 300 g / m 3 . Due to the decoupling, it is thus possible to size the Feinstkornabscheider 40 smaller, or provide only a Feinstkornabscheider 40 for several grinding plants 50. This reduces the required system size and thereby minimizes the resulting investment costs.
  • Fig. 4 a combined schematic diagram is shown, which shows the relationship between the Zyklonregel Kunststofflessnessge and the dust load of the carrier gas with respect to the fineness of the Feinstkorns.
  • the fineness of the ultrafine grain decreases with increasing cyclone air volume.
  • an optimum of the dust loading or particle loading of the carrier gas stream before the multicyclone forms for the fineness.
  • the multicyclone according to the invention and its operating method for separating fine and ultrafine particles thus enable a simple and efficient separation of fine and ultrafine grain as well as a decoupled operation to upstream process plants.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cyclones (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP16188007.5A 2016-09-09 2016-09-09 Procédé de fonctionnement d'un multicyclone pour la séparation de grains fins et ultrafins ainsi que multicyclones Active EP3292912B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP16188007.5A EP3292912B1 (fr) 2016-09-09 2016-09-09 Procédé de fonctionnement d'un multicyclone pour la séparation de grains fins et ultrafins ainsi que multicyclones
CA3007583A CA3007583A1 (fr) 2016-09-09 2017-09-08 Methode d'utilisation d'un multi-cyclone pour la separation de grains fins et tres fins ainsi qu'un multi-cyclone
PCT/EP2017/072546 WO2018046640A1 (fr) 2016-09-09 2017-09-08 Procédé pour faire fonctionner un multicyclone pour séparer du grain fin et du grain très fin, et multicyclone
US16/067,373 US10926270B2 (en) 2016-09-09 2017-09-08 Method for operating a multi-cyclone for the separation of fine and very fine grain as well as a multi-cyclone
CN201780008607.6A CN109641217B (zh) 2016-09-09 2017-09-08 操作多体旋风分离机构来分离细粒和超细粒的方法以及多体旋风分离机构
JP2018531546A JP6934871B2 (ja) 2016-09-09 2017-09-08 微細粒及び極微細粒の分離のためマルチサイクロンを動作させる方法並びにマルチサイクロン
SG11201804823RA SG11201804823RA (en) 2016-09-09 2017-09-08 Method for operating a multi-cyclone for the separation of fine and very fine grain as well as a multi-cyclone
EA201800353A EA034688B1 (ru) 2016-09-09 2017-09-08 Способ эксплуатации мультициклона для разделения мелких и очень мелких гранул, а также мультициклон

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16188007.5A EP3292912B1 (fr) 2016-09-09 2016-09-09 Procédé de fonctionnement d'un multicyclone pour la séparation de grains fins et ultrafins ainsi que multicyclones

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EA (1) EA034688B1 (fr)
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US11318482B2 (en) 2018-10-22 2022-05-03 Omachron Intellectual Property Inc. Air treatment apparatus
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CN111112084B (zh) * 2019-12-26 2023-06-30 盐城市普天涂装工业有限公司 一种风力选粉系统
TW202211972A (zh) * 2020-09-18 2022-04-01 日揚科技股份有限公司 氣固分離系統
CN114622996A (zh) * 2020-12-10 2022-06-14 通用电气阿维奥有限责任公司 空气/油分离器装置及方法
CN114515696B (zh) * 2022-01-13 2022-11-29 哈尔滨工业大学 可自动判别天然矿物颗粒级配状态的筛分和循环研磨装置

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US20200149247A1 (en) * 2017-07-14 2020-05-14 Vermeer Manufacturing Company Airlocks for conveying material, hydro excavation vacuum apparatus having airlocks, and methods for hydro excavating a site
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CN109641217A (zh) 2019-04-16
EA201800353A1 (ru) 2018-11-30
SG11201804823RA (en) 2018-07-30
CN109641217B (zh) 2021-05-28
EA034688B1 (ru) 2020-03-06
JP6934871B2 (ja) 2021-09-15
CA3007583A1 (fr) 2018-03-15
WO2018046640A1 (fr) 2018-03-15
US20190015840A1 (en) 2019-01-17
US10926270B2 (en) 2021-02-23
JP2019531178A (ja) 2019-10-31
EP3292912B1 (fr) 2019-12-25

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