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EP2478971A1 - Combined classifier - Google Patents

Combined classifier Download PDF

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Publication number
EP2478971A1
EP2478971A1 EP10814883A EP10814883A EP2478971A1 EP 2478971 A1 EP2478971 A1 EP 2478971A1 EP 10814883 A EP10814883 A EP 10814883A EP 10814883 A EP10814883 A EP 10814883A EP 2478971 A1 EP2478971 A1 EP 2478971A1
Authority
EP
European Patent Office
Prior art keywords
outer cylinder
classifying
scatter
classifier
air
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
EP10814883A
Other languages
German (de)
French (fr)
Other versions
EP2478971B1 (en
EP2478971A8 (en
EP2478971A4 (en
Inventor
Wei Bao
Yonglong Zhang
Xuemin Wang
Yanlai Xiong
Junya Hu
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.)
Hefei Cement Research and Design Institute Co Ltd
Original Assignee
Hefei Cement Research and Design Institute Co Ltd
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 CN2009201874981U external-priority patent/CN201579206U/en
Priority claimed from CN200910185016A external-priority patent/CN101745503A/en
Application filed by Hefei Cement Research and Design Institute Co Ltd filed Critical Hefei Cement Research and Design Institute Co Ltd
Publication of EP2478971A1 publication Critical patent/EP2478971A1/en
Publication of EP2478971A8 publication Critical patent/EP2478971A8/en
Publication of EP2478971A4 publication Critical patent/EP2478971A4/en
Application granted granted Critical
Publication of EP2478971B1 publication Critical patent/EP2478971B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
    • 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
    • B07B4/025—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall the material being slingered or fled out horizontally before falling, e.g. by dispersing elements
    • 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

Definitions

  • This application relates to a scatter classification device, in particular to a combined classifier.
  • the roller press is successfully applied in the cement grinding system to increase the production of the system by 50%-200% and save the power by 20%-40%. In this way, the energy may be saved and the power consumption of cement production is reduced, thereby realizing the sustainable development.
  • the roller press employs the high-pressure material bed crushing theory and operates in a manner of individual particle crushing grouplization.
  • the granularity of fragile materials is reduced rapidly after being pressed under high pressure (the pressure of the pressing area is about 150 MPa), with the content of fine powders smaller than 0.08mm being up to 20-30%, and the content of materials smaller than 2mm being above 70%.
  • the grinding system using the roller press increases the production by 50-200%, reduces the power consumption per unit yield by 20-40%, and decreases the operating noise of the device which improves the worker's working environment, thereby showing remarkable economical benefits and social benefits.
  • the object of the present application is to provide a combined classifier for scattering and multi-classifying materials pressed by a roller press, specifically, separating materials unpressed and pressed insufficiently by using the combination of air classification and screening and feeding the separated materials back into the roller press to be re-pressed, which has high classification efficiency.
  • a combined classifier includes an outer cylinder and an inner cylinder fixedly provided inside the outer cylinder, wherein a classifying motor is installed on an upper end of the outer cylinder by a bracket, a rotating shaft extends into the outer cylinder and is fixedly connected to a lower end of an output shaft of the classifying motor, a classifying impeller is located above the inner cylinder and is installed on a lower end of the rotating shaft, a hollow shaft sleeves outside the rotating shaft and is driven by a scatter motor, a material scatter plate is installed on a lower end of the hollow shaft, above the material scatter plate a material inlet is provided in the outer cylinder, a material outlet is provided in a lower end of the outer cylinder, and wherein a cone-shaped material unloading hopper is provided at a lower end of the inner cylinder and is provided with sieve openings on a sidewall thereof, an air classifier is communicationally connected to the material unloading hopper and includes an air intake passage, an air discharging passage, a material discharging passage and a
  • the air classifier is provided in the outer cylinder, with the air intake passage, the material discharging passage and the material unloading passage all extending out of a side wall of the outer cylinder; or the air classifier is provided outside the outer cylinder.
  • the material scatter boards are processed for wear-resistance, and are arranged in a fishbone shape.
  • materials are classified in multiple stages, resulting in high classification efficiency; and a principle of screening prior to air classification is employed, thus energy consumption is saved.
  • the portions fully contacting with the materials are all processed for wear-resistance or made of wear-resistant materials, thus the service life of the device is prolonged.
  • a damageable structure needed to be regularly replaced is formed by assembling its components made respectively, which may reduce the weight of the damageable structure and facilitate the assembly and the disassembly.
  • Figure 1 is a schematic view of the structure of the present application.
  • a combined classifier including an outer cylinder 1 is shown.
  • An inner cylinder 2 is fixedly provided inside the outer cylinder 1.
  • a classifying motor 3 is installed on an upper end of the outer cylinder 1 by a bracket.
  • a rotating shaft 4 extending into the outer cylinder 1 is fixedly connected to a lower end of an output shaft of the classifying motor 3.
  • a classifying impeller 5 located above the inner cylinder 2 is installed on a lower end of the rotating shaft 4.
  • a hollow shaft 6 sleeves outside the rotating shaft 4 and is driven by a material scatter motor 7.
  • a material scatter plate 8 is installed on a lower end of the hollow shaft 6, and above the material scatter plate 8 a material inlet 9 is provided in the outer cylinder.
  • a material outlet 10 is provided in a lower end of the outer cylinder 1.
  • a cone-shaped material unloading hopper 11 is provided at the lower end of the inner cylinder 2, and is provided with sieve openings on the sidewall thereof.
  • An air classifier 12 is communicationally connected to the material unloading hopper 11, and includes an air intake passage, an air discharging passage 13, a material discharging passage 14 and a material unloading passage 15 which intersect. Material scatter boards 16 staggered with each other are fixed at an intersection of the above passages, and are processed for wear-resistance, and are arranged in a fishbone shape.
  • the air classifier is provided in the outer cylinder, with the air intake passage, the material discharging passage and the material unloading passage all extending out of a side wall of the outer cylinder. Alternatively, the air classifier may also be provided outside the outer cylinder.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

A combined classifier includes an outer cylinder (1) and an inner cylinder (2) fixed in the outer cylinder (1). A classifying motor (3) is mounted on the upper end of the outer cylinder (1) by a bracket. The lower end of the output shaft of the classifying motor (3) is fixedly connected with a rotating shaft (4) which extends into the inside of the outer cylinder (1). The lower end of the rotating shaft (4) is provided with a classifying impeller (5) which is above the inner cylinder (2). A feeding inlet (9) is set on the outer housing above a scatter plate (8), and a discharging outlet (10) is provided on the lower end of the outer cylinder (1). A cone-shaped discharging hopper (11) is set on the lower end of the inner cylinder (2), and the side wall thereof is provided with sieve openings. The discharging hopper (11) is communicationally connected with an air classifier (12). The combined classifier is provided to scatter and classify the materials squeezed by a roll squeezer, thereby separating the materials that are not squeezed or not fully squeezed by the combination of air classification and screen sizing, and conveying the materials back to the roll squeezer to re-squeeze, so that the classifying efficiency can be improved.

Description

    FIELD OF THE INVENTION
  • This application relates to a scatter classification device, in particular to a combined classifier.
    • BACKGROUND OF THE INVENTION
  • At present, with the rapid development of China's national economy in recent years, the cement production of China has already been up to one billion tons. New production lines are all large-scale production lines having annual production of 700,000 tons or more. Power consumption per ton of cement is about 90-100 kWh, and the power consumption of cement grinding process is 60-70% of the cement production power consumption. The annual power consumption of the cement grinding process is up to about 60 billion kWh. The roller press is successfully applied in the cement grinding system to increase the production of the system by 50%-200% and save the power by 20%-40%. In this way, the energy may be saved and the power consumption of cement production is reduced, thereby realizing the sustainable development. The roller press employs the high-pressure material bed crushing theory and operates in a manner of individual particle crushing grouplization. The granularity of fragile materials is reduced rapidly after being pressed under high pressure (the pressure of the pressing area is about 150 MPa), with the content of fine powders smaller than 0.08mm being up to 20-30%, and the content of materials smaller than 2mm being above 70%. Besides, there is a mass of micro cracks in the pressed materials, which improves the grindability of the materials and greatly reduces the energy consumption for grinding the materials in the next procedure. Based on the actual usage data already obtained, compared with the conventional grinding system, the grinding system using the roller press increases the production by 50-200%, reduces the power consumption per unit yield by 20-40%, and decreases the operating noise of the device which improves the worker's working environment, thereby showing remarkable economical benefits and social benefits.
    • SUMMARY OF THE INVENTION
  • The object of the present application is to provide a combined classifier for scattering and multi-classifying materials pressed by a roller press, specifically, separating materials unpressed and pressed insufficiently by using the combination of air classification and screening and feeding the separated materials back into the roller press to be re-pressed, which has high classification efficiency.
  • The technical solutions of the present application are as follows.
  • A combined classifier includes an outer cylinder and an inner cylinder fixedly provided inside the outer cylinder, wherein a classifying motor is installed on an upper end of the outer cylinder by a bracket, a rotating shaft extends into the outer cylinder and is fixedly connected to a lower end of an output shaft of the classifying motor, a classifying impeller is located above the inner cylinder and is installed on a lower end of the rotating shaft, a hollow shaft sleeves outside the rotating shaft and is driven by a scatter motor, a material scatter plate is installed on a lower end of the hollow shaft, above the material scatter plate a material inlet is provided in the outer cylinder, a material outlet is provided in a lower end of the outer cylinder, and wherein a cone-shaped material unloading hopper is provided at a lower end of the inner cylinder and is provided with sieve openings on a sidewall thereof, an air classifier is communicationally connected to the material unloading hopper and includes an air intake passage, an air discharging passage, a material discharging passage and a material unloading passage which intersect, and material scatter boards staggered with each other are fixed at an intersection of the passages.
  • The air classifier is provided in the outer cylinder, with the air intake passage, the material discharging passage and the material unloading passage all extending out of a side wall of the outer cylinder; or the air classifier is provided outside the outer cylinder.
  • The material scatter boards are processed for wear-resistance, and are arranged in a fishbone shape.
  • The advantages of the present application are as follows.
  • In the present application, materials are classified in multiple stages, resulting in high classification efficiency; and a principle of screening prior to air classification is employed, thus energy consumption is saved.
  • The portions fully contacting with the materials are all processed for wear-resistance or made of wear-resistant materials, thus the service life of the device is prolonged.
  • A damageable structure needed to be regularly replaced is formed by assembling its components made respectively, which may reduce the weight of the damageable structure and facilitate the assembly and the disassembly.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Figure 1 is a schematic view of the structure of the present application.
    • DETAILED DESCRIPTION OF THE EMBODIMENTS
  • Referring to figure 1, a combined classifier including an outer cylinder 1 is shown. An inner cylinder 2 is fixedly provided inside the outer cylinder 1. A classifying motor 3 is installed on an upper end of the outer cylinder 1 by a bracket. A rotating shaft 4 extending into the outer cylinder 1 is fixedly connected to a lower end of an output shaft of the classifying motor 3. A classifying impeller 5 located above the inner cylinder 2 is installed on a lower end of the rotating shaft 4. A hollow shaft 6 sleeves outside the rotating shaft 4 and is driven by a material scatter motor 7. A material scatter plate 8 is installed on a lower end of the hollow shaft 6, and above the material scatter plate 8 a material inlet 9 is provided in the outer cylinder. A material outlet 10 is provided in a lower end of the outer cylinder 1. A cone-shaped material unloading hopper 11 is provided at the lower end of the inner cylinder 2, and is provided with sieve openings on the sidewall thereof. An air classifier 12 is communicationally connected to the material unloading hopper 11, and includes an air intake passage, an air discharging passage 13, a material discharging passage 14 and a material unloading passage 15 which intersect. Material scatter boards 16 staggered with each other are fixed at an intersection of the above passages, and are processed for wear-resistance, and are arranged in a fishbone shape. The air classifier is provided in the outer cylinder, with the air intake passage, the material discharging passage and the material unloading passage all extending out of a side wall of the outer cylinder. Alternatively, the air classifier may also be provided outside the outer cylinder.

Claims (3)

  1. A combined classifier comprising an outer cylinder and an inner cylinder fixedly provided inside the outer cylinder, wherein a classifying motor is installed on an upper end of the outer cylinder by a bracket, a rotating shaft extends into the outer cylinder and is fixedly connected to a lower end of an output shaft of the classifying motor, a classifying impeller is located above the inner cylinder and is installed on a lower end of the rotating shaft, a hollow shaft sleeves outside the rotating shaft and is driven by a scatter motor, a material scatter plate is installed on a lower end of the hollow shaft, above the material scatter plate a material inlet is provided in the outer cylinder, a material outlet is provided in a lower end of the outer cylinder,
    and wherein a cone-shaped material unloading hopper is provided at a lower end of the inner cylinder and is provided with sieve openings on a sidewall thereof, an air classifier is communicationally connected to the material unloading hopper and comprises an air intake passage, an air discharging passage, a material discharging passage and a material unloading passage which intersect, and material scatter boards staggered with each other are fixed at an intersection of the passages.
  2. The combined classifier according to claim 1, wherein the air classifier is provided in the outer cylinder, with the air intake passage, the material discharging passage and the material unloading passage all extending out of a side wall of the outer cylinder; or the air classifier is provided outside the outer cylinder.
  3. The combined classifier according to claim 1, wherein the material scatter boards are processed for wear-resistance, and are arranged in a fishbone shape.
EP10814883.4A 2009-09-14 2010-09-13 Combined classifier Not-in-force EP2478971B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN2009201874981U CN201579206U (en) 2009-09-14 2009-09-14 Combined classifier
CN200910185016A CN101745503A (en) 2009-10-28 2009-10-28 Combined type classifier
PCT/CN2010/001401 WO2011029281A1 (en) 2009-09-14 2010-09-13 Combined classifier

Publications (4)

Publication Number Publication Date
EP2478971A1 true EP2478971A1 (en) 2012-07-25
EP2478971A8 EP2478971A8 (en) 2012-10-03
EP2478971A4 EP2478971A4 (en) 2014-06-11
EP2478971B1 EP2478971B1 (en) 2015-11-11

Family

ID=43731950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10814883.4A Not-in-force EP2478971B1 (en) 2009-09-14 2010-09-13 Combined classifier

Country Status (4)

Country Link
EP (1) EP2478971B1 (en)
AU (1) AU2010292806B2 (en)
BR (1) BR112012005524B1 (en)
WO (1) WO2011029281A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105728141A (en) * 2014-12-09 2016-07-06 安徽颐源高科有限公司 Scattering and classifying machine
CN105728140A (en) * 2014-12-09 2016-07-06 安徽颐源高科有限公司 Powder scattering device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR994202A (en) * 1948-10-04 1951-11-14 Safety Car Heating & Lighting Method and apparatus for the separation of materials by centrifugation
DE1607654A1 (en) * 1967-12-04 1970-01-08 Polysius Ag Circulating air separator with hot air drying
GB1215914A (en) * 1969-02-14 1970-12-16 Polysius Ag A combined recirculating air classifier and hot air drier
JPS63501347A (en) * 1986-04-11 1988-05-26 ベロイト・コーポレイシヨン rotating separator
CN2183829Y (en) * 1993-11-27 1994-11-30 国家建材局合肥水泥研究设计院 Material grading apparatus
CN2267869Y (en) * 1996-07-12 1997-11-19 于建国 Differential-cyclic powder sorter
DE19648841A1 (en) * 1996-11-26 1998-05-28 Deutz Ag Separator for granular materials
GB9827670D0 (en) * 1998-12-17 1999-02-10 Erozlu Metin Classifier
DE19959183A1 (en) * 1999-12-08 2001-06-13 Krupp Polysius Ag Wind sifter to separate coarse and fine goods has sifter chamber with outputs for coarse fraction and for fine fraction and air mixture and separation cyclone to remove fine fraction
CN101745503A (en) * 2009-10-28 2010-06-23 合肥水泥研究设计院 Combined type classifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105728141A (en) * 2014-12-09 2016-07-06 安徽颐源高科有限公司 Scattering and classifying machine
CN105728140A (en) * 2014-12-09 2016-07-06 安徽颐源高科有限公司 Powder scattering device

Also Published As

Publication number Publication date
AU2010292806A1 (en) 2012-04-26
AU2010292806B2 (en) 2013-05-02
BR112012005524A2 (en) 2016-04-26
WO2011029281A1 (en) 2011-03-17
EP2478971B1 (en) 2015-11-11
BR112012005524B1 (en) 2020-05-26
EP2478971A8 (en) 2012-10-03
EP2478971A4 (en) 2014-06-11

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