EP3166727A2 - Unité de purification - Google Patents

Unité de purification

Info

Publication number
EP3166727A2
EP3166727A2 EP15738576.6A EP15738576A EP3166727A2 EP 3166727 A2 EP3166727 A2 EP 3166727A2 EP 15738576 A EP15738576 A EP 15738576A EP 3166727 A2 EP3166727 A2 EP 3166727A2
Authority
EP
European Patent Office
Prior art keywords
wind sifter
wind
paper
cleaning unit
sifter
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.)
Withdrawn
Application number
EP15738576.6A
Other languages
German (de)
English (en)
Inventor
Claus WOLDBYE
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.)
Gypsum Recycling Holding Aps
Original Assignee
Gypsum Recycling Holding Aps
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 claimed from DKPA201470442A external-priority patent/DK201470442A1/en
Application filed by Gypsum Recycling Holding Aps filed Critical Gypsum Recycling Holding Aps
Publication of EP3166727A2 publication Critical patent/EP3166727A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
    • B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
    • B03B9/065—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial the refuse being building rubble
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B07B1/24—Revolving drums with fixed or moving interior agitators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/04—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall in cascades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/58—Construction or demolition [C&D] waste

Definitions

  • the present invention relates to a purification unit, i.e. a method for using such purification unit as well as an apparatus having the various features making up such a puri- fication unit.
  • waste consisting of dry paper and cardboard mixed with several other materials and/or paper waste where other materials weakly or strongly is adhered to the surface is generated.
  • waste are relatively complex in that they usually consist of various materials which by themselves would be valuable for reuse, but when mixed together or adhered together become very expensive and/or very difficult to purify into valuable recyclable materials such as for example recyclable clean paper.
  • the present invention is directed to a method as well as an apparatus which in a dry process can separate those complex waste materials into purified material fractions, particularly remove material that adheres to paper surfaces, such that a purified paper fraction may be the end result without destroying the structure of the paper as such.
  • upstream and downstream shall mean the combined materials travelling direction through the apparatus and as following from the description of the method.
  • the invention addresses this by providing a method for separating a combined material where said material at least comprises gypsum and paper, where said combined material (in a step) a) is led into a first wind sifter in which wind sifter a first upwards airflow is regulated such that a first fraction comprising heavier particles of the material falls to the bottom of the wind sifter and are evacuated through a bottom outlet, whereas a second fraction comprising lighter particles and paper is evacuated through an upper outlet; and b) where the paper sorted in the wind sifter is led into a cleaning unit, in which unit the paper is mechanically cleaned from any loose or adhering particles, gypsum or other matter, after which cleaning process the cleaned paper is transferred to further processing, and the loose or adhering particles, gypsum or other matter, as well as any heavier particles are collected separately.
  • the combined material is typically delivered in the shape of already reduced and partially cleaned paper fraction, for example the paper fraction derived by the applicant's earlier method and apparatus according to EP 1421995 Bl or alternatively for example DE20004472U1.
  • a wind sifter is a device in which inside a housing an airstream is provided from the bottom towards the top such that particles or objects which can float or be lifted by the air stream are moved to the top of the wind sifter, whereas heavier items which due to the influence of gravity are not able to float or be lifted by the airstream will fall towards the bottom of the wind sifter. In this manner it is possible by means of a wind sifter to separate a material stream into lighter or heavier particles in relation to the upwards airstream. Naturally, the faster the airstream, the heavier the objects which may be moved to the top of the wind sifter are.
  • one or more baffles may be provided inside the housing of the wind sifter such that heavy articles which fall downwards against the airstream may impact the baffles and in this process potentially fracture or loosen some of the adhered material such that a further segregation of the material stream is carried out through the wind sifter.
  • the wind sifters i.e. both the first and second wind sifters may instead have a Z shape, such that the cross section of the air passage remains substantially constant.
  • a wind sifter will have 2-5 zig-zag's. In this manner the airflow may be kept constant.
  • the wind speed inside the wind sifter will be adjusted such that the desired effect is obtained, i.e. the desired output is collected at the desired outlets.
  • the conveyors may for example have different characteristics, will convey the mainly paper fractions to a cleaning unit.
  • the paper is mechanically cleaned, meaning that the paper is impacted to such a degree that any adhering or loosely adhering material will be liberated from its connection to the paper.
  • This material, liberated from the paper will be collected separately and will mainly consist of material dust, preferably gypsum dust, and fibers, typically paper fibres liberated by the preceding process.
  • the cleaning unit will furthermore have means to evacuate or expel the cleaned paper, which may then be collected for reuse.
  • the product leaving the cleaning unit will have a quality where the paper fraction is suitable for pellets used as fuel, or other purposes where a certain degree of foreign matter, in particular gypsum may be tolerated.
  • the method is further distinguished in that after step a) a second wind sifter is introduced wherein the second fraction (evacuated from the upper outlet) is introduced into a second wind sifter, where a second upwards airflow, said second upwards airflow being slower than the first upwards airflow, is regulated such that paper and any heavier particles fall to the bottom of said second wind sifter, where the paper and any heavier particles are extracted as a third fraction from the second wind sifter, and transferred to the cleaning unit in step c).
  • lighter particles and paper are evacuated and by conveying means transported to the second wind sifter.
  • the airstream is again adjusted such that lighter and more heavy particles will be separated.
  • the airstream here will be slower than the airstream in the first wind sifter, such that the paper will be allowed to float to the bottom of the wind sifter and be evacuated through the bottom outlet in the second wind sifter.
  • the upper outlet will mainly evacuate dust, plastic foils and loose fibers which will be lead to a filter in order to separate these particles from the air which may then be expelled from the apparatus.
  • the collected particles may be stored for further use or may be disposed of appropriately.
  • the first wind sifter is replaced by a device for sorting lighter items from the material, where said device comprises optical recognition means, particularly a laser and a perforated conveyor on which the material is transported, where air-jets are arranged below said perforated conveyor such that as the optical recognition means detects lighter items in the material, the air-jets are activated in such a manner that the lighter items are ejected from the material on the per- forated conveyor.
  • optical recognition means particularly a laser and a perforated conveyor on which the material is transported
  • air-jets are arranged below said perforated conveyor such that as the optical recognition means detects lighter items in the material, the air-jets are activated in such a manner that the lighter items are ejected from the material on the per- forated conveyor.
  • This device is effective in sorting especially plastic or other larger lighter objects away from the material stream.
  • the device however requires more space than a wind sifter, and is therefore less suitable to be used with the method when the apparatus for carrying out the method is arranged on a mobile unit, where space and efficiency is at a premium.
  • the laser optics/perforated conveyor option is a viable option.
  • the method is further distinguished in that after step b) a second wind sifter is arranged wherein the cleaned material leaving the cleaning unit is introduced into the second wind sifter, where a second upwards airflow, said second upwards airflow being slower than the first upwards airflow, is regulated such that paper and any heavier particles fall to the bottom of said second wind sifter, where the paper and any heavier particles are extracted as a third fraction from the second wind sifter.
  • the airflow in the wind sifters may be recirculated, such that an equilibrium in the airflow either for each wind sifter or for the pair of wind sifters is achieved.
  • the air locks between the first and second wind sifters are advantageously arranged as the upper limitation of the second wind sifter and in this manner also helps to distribute the material to be treated in the second wind sifter, substantially evenly across the wind sifters cross section. In this manner the features of the wind sifter are utilised in the best manner.
  • the combined material to be treated according to the method is received in a material distribution unit, from which the combined material is dosed and fed to the first wind sifter.
  • dosed shall be understood as the material distribution unit regulates how much material is allowed to enter the first wind sifter, i.e the material distributing unit is dosing the amount of material according to the wind sifters and other downstream equipments' capacity/ability to correctly treat the combined materi- al.
  • the material distribution unit has two main purposes, namely to translate batch feeding of a combined material being fed into the material distribution unit into a continuous flow of material from the material distribution unit and to provide and control the flow capacity of the feed material such that the further process steps, for example the wind sifters etc., downstream of the material distribution unit are provided with material as a continuous drizzle of material being entered into the first wind sifter.
  • One of the overriding aspects of the invention is the possibility for the method to be carried out at the site where the combined material to be treated is located, where the wind sifters, conveying means, cleaning unit, dust removal means, material distribution means and other necessary aggregates necessary for carrying out the method are arranged on a mobile unit, which unit is transported to the site where the combined material is to be treated or is stored.
  • the invention is also directed to an apparatus for separating fractions from a combined material, said combined material at least comprising paper and gypsum, where said apparatus comprises: - means for receiving and feeding the combined material to a
  • - cleaning unit at least comprising a sieve and having means for mechanically impact- ing and cleaning the material feed to said cleaning unit, where said cleaning unit has at least two outlets: a first outlet allowing gypsum and debris to evacuate the cleaning unit, and a second outlet allowing cleaned paper to evacuate the cleaning unit.
  • the receiving and feeding means make sure that the combined material is fed as a substantially continuous drizzle to the first wind sifter where the first separation of material is achieved.
  • This continuous drizzle of material provides for the downstream processes to be carried out substantially continuous.
  • the wind sifter and particularly the air speed inside the wind sifter is adjusted such that heavy particles, for example lumps of gypsum, steel and other materials, will move against the airflow due to the influence of gravity and be evacuated through the outlet at the bottom of the first wind sifter.
  • This fraction of the material may be treated again before being entered into the means for receiving and feeding the combined material, for example in a crushing unit such that the particles of this fraction become smaller.
  • the fraction which is lifted by the airflow inside the wind sifter is transported to the second wind sifter by conveying means.
  • the conveying means will be in the shape of a pipe conveyor such that any dust or lighter fractions are not able to escape to the ambient environment, and furthermore all the material will be transported in the pipe due to an airflow inside the pipe and enter the second wind sifter in an upper part of the wind sifter.
  • the apparatus is defined in various embodiments as having: - a second wind sifter is arranged downstream of the first conveying means, said second wind sifter having an upper inlet connected to said first conveying means and upper and lower outlets, where said lower outlet by one or more second conveying means is connected to said cleaning unit.
  • the first wind sifter is replaced by a device for sorting lighter items from the material
  • said device comprises optical recognition means, particularly a laser and a perforated conveyor on which the material is transported, where air-jets are arranged below said perforated conveyor such that as the optical recognition means detects lighter items in the material, the air-jets are activated in such a manner that the lighter items are ejected from the material on the perforated conveyor.
  • said cleaning unit a second wind sifter is arranged wherein the cleaned material leaving the cleaning unit is introduced into the second wind sifter, where a second upwards airflow, said second upwards airflow being slower than the first upwards airflow, is regulated such that paper and any heavier particles fall to the bottom of said second wind sifter, where the paper and any heavier particles are extracted as a third fraction from the second wind sifter.
  • the means for receiving and feeding the combined material to the first wind sifter comprises a hopper for receiving material to be treated in the apparatus, where in the bottom of said hopper a conveyor is arranged for urging the received combined material against a distribution device, said distribution device arranged such that a lower part of the device is distanced a predetermined distance above the conveyor, and that the device is rotating such that the lower portion of the device is rotating against the flow of material on the conveyor, whereby a predetermined amount of material is allowed to pass the distribution device.
  • the object of the means for receiving and feeding the combined material to the first wind sifter is to make sure that a substantially continuous drizzle of material is fed into the first wind sifter, such that a substantially continuous separation process is obtained by the apparatus.
  • the drum is brought to rotate around an axle arranged perpendicular to the materials travelling direction, and at a distance from the conveyor, leaving a gap between the conveyor and the lowermost part of the drum, through which material may pass on to the wind sifter. Surplus material will be removed by the drum and replaced back on the material in the hopper upstream from the drum. In this manner a substantially continuous material flow is conveyed to the first wind sifter.
  • the first and/or second wind sifters are provided with dust separators which separators are connected to dust filters, where said filters comprises means for collecting gypsum dust.
  • the cleaning unit comprises a rotatable drum sieve wherein brushes and/or baffles are arranged, such that the brushes and/or baffles will engage and/or impact the fraction of the combined material fed into the cleaning device.
  • the conveying means between the first and second wind sifters, and/or between the first wind sifter and the cleaning unit, and/or between the cleaning unit and the second wind sifter, and/or between the second wind sifter and the cleaning unit, and/or between the device for sorting lighter items and the cleaning unit one or more restriction or impact chicanes are arranged for impacting material being passed through the conveyor.
  • the restriction or impact chicane serves to loosen or segregate materials from each other being transported in the conveyor from the first to the second wind sifter.
  • the apparatus is a mobile unit, where all means, wind sifters, features and aggregates are arranged on a mobile unit which unit optionally is self-sufficient with regard to power.
  • the first and second wind sifters are provided with dust separators which separators are connected to dust filters, where said filters comprises means for collecting gypsum dust.
  • the removal of dust and collection in a dust filter provides the advantage that the ap- paratus as such does not have a huge impact on the environment in that the dust is kept in a closed system and collected. Furthermore, as the dust is removed from the material being transported through the various devices of the apparatus, this dust fraction need not be treated in the various devices and as such the overall amount of material being moved through the apparatus is limited to the necessary and valuable frac- tions by removing undesired dust etc.
  • the dust removal and separating units arranged between the first and second wind sifters also distributes the material in the second wind sifter, whereby the second wind sifter achieves an optimum performance, as the material introduced is introduced substantially evenly across the entire cross-section of the wind sifter.
  • one or more dust separators may be arranged in the inlet of the second wind sifter.
  • the cleaning unit which comprises a ro- tatable drum sieve wherein brushes and/or baffles are arranged, such that as the drum rotates the brushes and/or baffles will engage or impact the fraction of the combined material fed into the cleaning device.
  • the material which will typically enter the cleaning unit will be relatively dust free and will be in the shape of relatively clean paper, paper with an adhered material layer and agglomerates of other substances.
  • the material adhered to the paper will be worn or brushed off or due to the im- pact with the baffles be knocked off the paper such that the paper will be very clean from material when it exits the cleaning unit.
  • the drum rotates slowly in order to clean the apertures in the drum from material resi- due removed from the paper by the brushes and baffles.
  • the brushes and/or baffles may also rotate, typically counter rotate relative to the drum.
  • the rotation speed may furthermore be varied in order to optimize the effect.
  • Figure 1 illustrates a schematic overview of the various steps and devices
  • Figure 2 illustrates a mobile unit carrying out the separating process.
  • figure 1 is illustrated a schematic overview of the various steps and devices which together make up the inventive method and apparatus.
  • material to be treated is loaded into the means for receiving and feeding the combined material, in this instance in the shape of a hopper 10.
  • a conveyor belt 11 which will transport the combined material towards a distribution device 12.
  • the conveyor belt 11 will urge the material against the distribution device 12 such that the material which is let out of the hopper 10 onto the conveyor will be provided as a substantially continuous material stream.
  • Due to the conveyor 11 continuously urging the material against the distribution device 12 a drizzle of shredded and/or particulated and/or impacted material will substantially continuously arrive at the conveyor 13.
  • the conveyor will by further conveying means 14 introduce the drizzle of material into a first wind sifter 20.
  • the fur- ther conveying means 14 may comprise an air lock such that any dust generated from this stage forward will be contained inside the further processing equipment.
  • the first wind sifter is provided with a housing inside of which an upwards airflow is arranged such that particles being introduced through the air lock will, depending on their weight either be urged upwards due to the airstream inside the wind sifter 20 and the heavier particles which due to the influence of gravity will be able to counter the upwards airflow will fall to the bottom of the wind sifter 20.
  • the downwards travelling particles will encounter baffles 21, 22.
  • the impact will cause further disintegration of the material such that potentially lighter particles liberated by the impact will be carried by the upwards airstream out of the outlet 23 provided in the wind sifter 20.
  • the wind sifters, both the first and the second wind sifters 20, 30 may have a zig-zag shape such that the air-flow cross-section is relatively constant, but due to the zig-zag shape the material being introduced into the wind sifters will experience mechanical abrasion or impact through the passage in the wind sifters.
  • the wind sifters 20, 30 may have baffles or zig-zag configuration or both depending on the particular application.
  • the material arriving at the collection point 25 may be any type of material such as for example wood, plastic, steel, glass, but also lumps of combined material which has not been crushed or otherwise fractioned sufficiently in order to be able to be carried out of the first wind sifter by the upwards airstream. Therefore, in some examples the material collected at the collection point 25 may be reintroduced into the hopper 10 for a reprocessing cyclus as described above.
  • the material being evacuated through the upper outlet 23 will be transported to a second wind sifter 30 by means of appropriate conveying means 26.
  • these conveying means will be pipes in which an air-flow will convey the material from the first wind sifter 20 to the second wind sifter 30. Also in these conveying means appro- priate air locks 27, 28 are provided. The air locks 27, 28 as well as the air lock in the conveying means between the conveyor 13 and the first wind sifter also has means for separating the dust from the air-flow.
  • a second upwards air-flow is provided such that lighter items will be extracted through the upper outlet 31 whereas heavy items which due to the impact of gravity will be able to overcome the outwards air-flow will be extracted through the lower outlet 32.
  • the lower outlet 32 is connected to conveying means 33 which will lead the collected heavier fraction evacuated through the lower outlet 32 to a cleaning unit 40.
  • the conveying means 33 may be provided in any suitable manner, but preferably either a pipe system conveyor or an air-flow transports the fractions from the second wind sifter 30 to the cleaning device 40 or a series of conveyors may be provided according to circumstances.
  • the cleaning device typically will comprise a rotating sieve 41 such that the fraction of the combined material arriving in the cleaning device will be rotated by the sieve thereby impacting with other material parts as well as the sieve and in that process liberate particles adhered to the paper.
  • a brush and/or baffle device may be in- stalled inside the cleaning device 40 in order to mechanically brush off or knock off any adhered or loosely held particles from the paper or cardboard fractions.
  • the brush and/or baffles may also be rotated optionally in a direction opposite to that of the drum.
  • the drum is mainly rotated in order to clean the openings in the sieve, thereby allowing loosened material to escape the sieve.
  • the particles will due to gravity and the apertures in the sieve 41 be able to collect at the bottom of the cleaning device 40 and be evacuated through a bottom outlet 42 for further processing or storage in a receiving unit 43.
  • the material arriving at the receiving unit 43 will consist of powder, sand and paper fibres.
  • a rotating drum sieve is described a flat sieve being agitated and having means for brushing and/or impacting the material is also suitable within the concept of the present invention.
  • the remaining fractions, i.e. the cleaned paper fractions will be evacuated from the cleaning device 40 and by suitable conveying means collected in bulk 45 for reuse.
  • the cleaning device or rather the housing of the cleaning device is also connected to a filter and a suction fan, such that dust or lighter particles present in the cleaning device may be evacuated by these means.
  • air locks and dust separators generally referred to by the letter A are arranged in order to collect any dust generated due to the processing of the combined material. This collection may be done in order to purify the separation process, but also in order to collect valuable fractions, for example gypsum powder or combined gypsum powder with paper fibres which may be used as additives in other processes, for example the manufacture of gypsum boards or the like.
  • a restrictor or impact chicane 50 is arranged between the first and second wind sifters 20, 30.
  • This chicane serves to further allow the particles evacuated by the upper outlet 23 of the first chicane 20 to be mechanically abrased in order to loosen and separate particles from the paper. Consequently, these loosened particles will either be removed due to the dust filters/separator A, 27, 28 or be evacuated through the upper outlet 31 in the second wind sifter 30.
  • FIG 2 an illustration of a mobile unit carrying out the separating process as described above is illustrated.
  • the mobile unit 60 is arranged on a trailer 61 said trailer having connection means to a truck 64 and a set of bogey wheels 66 in this par- ticular embodiment.
  • the hopper 10 is in this embodiment provided on legs 16 such that it will be possible to feed a drizzle of material arriving to the mobile unit 60 by the conveyor 13 into a relatively elevated receiving hopper 68 arranged in combination with the first air lock A on the mobile unit.
  • figure 1 schematically illustrates the process and the various devices used in the inventive method whereas figure 2 illustrates a mobile unit onto which the various devices have been fitted.
  • the mobile unit may be provided with a housing covering the various implements, but for clarity reasons this housing has not been illustrated.
  • the mobile unit has been prepared for production in that a number of the features of the apparatus have been "unfolded” i.e. brought from their transport position to their production position.
  • the features are arranged on the vehicle in the most optimized manner with respect to transport (i.e. limited width and height).
  • the apparatus is not suitable to function, as for example many of the conveyors will not be able to transport material to desired locations.
  • the features/aggregates which are to be repositioned when making the mo- bile unit ready for production or ready for transport are mounted/arranged such that they can easily be swung into position, for example by means of actuators etc.
  • dust filter units 70, 72, 74 which in turn are provided with appropriate suction fan means 76, 78, 80 such that substantially clean and dust free air may be expelled from the process equipment whereas the dust is collected by the dust filters 70, 72, 74 for example for further use or for appropriate disposal.
  • the cleaning device is here described as comprising a rotating sieve 41, but the me- chanical cleaning device may also have other configurations as long as for example it is ensured that the paper pieces arriving at the cleaning unit are mechanically abraded, for example by brushes, sponges, impact baffles or the like which are effective to brush off or remove any particles adhered to the paper's surface.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

L'invention concerne un procédé de séparation d'un matériau combiné dans lequel ledit matériau comprend au moins du gypse et du papier, dans lequel ledit matériau combiné (dans une étape a) est amené dans un premier tamis pneumatique dans lequel un premier flux d'air vers le haut est régulé de sorte qu'une première fraction comprenant des particules plus lourdes du matériau tombe au fond du tamis pneumatique et est évacuée par le biais d'une évacuation inférieure tandis qu'une deuxième fraction comprenant des particules plus légères et du papier est évacuée par le biais d'une évacuation supérieure; b) dans lequel la deuxième fraction (évacuée à partir de l'évacuation supérieure) est introduite dans un second tamis pneumatique, où un second flux d'air vers le haut, ledit second flux d'air vers le haut étant plus lent que le premier flux d'air vers le haut, est régulé de sorte que le papier et toutes les particules plus lourdes tombent au fond dudit second tamis pneumatique, où le papier et toutes les particules plus lourdes sont extraits sous la forme d'une troisième fraction du second tamis pneumatique et transférés vers une unité de nettoyage, dans laquelle le papier est nettoyé de toutes particules libres ou non, de gypse ou d'autres matériaux, le papier nettoyé étant transféré après ledit processus de nettoyage vers un autre traitement, et les particules libres ou non, de gypse ou d'autres matériaux, ainsi que toutes les particules plus lourdes étant collectées séparément.
EP15738576.6A 2014-07-08 2015-07-08 Unité de purification Withdrawn EP3166727A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA201470426 2014-07-08
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NL8301400A (nl) * 1983-04-21 1984-11-16 Esmil Bv Werkwijze voor het scheiden van huishoudelijk afval.
JP2001009434A (ja) * 1999-06-28 2001-01-16 Ishikawajima Harima Heavy Ind Co Ltd 廃棄石膏ボードの処理方法及び装置
DE20004472U1 (de) * 2000-03-10 2000-05-18 Magey, Peter-Georg, 86199 Augsburg Anlage zum Verarbeiten von Gipskartonplatten zu wiederverwertbaren Produkten
DK176291B1 (da) * 2002-08-18 2007-06-11 Ballermann Karin Fremgangsmåde og anlæg til separering og genoparbejdning af sammensatte materialer
JP2009172498A (ja) * 2008-01-23 2009-08-06 Chuo Kankyo Kaihatsu Co Ltd 廃石膏ボードの分別リサイクルシステム、分別リサイクル装置及び分別リサイクル方法
IT1396974B1 (it) * 2009-11-13 2012-12-20 Euromoquettes S R L Impianto per il recupero di gesso crudo da cartongesso o da altri simili materiali a base di gesso.
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