WO1999047306A1 - Grit recovery apparatus - Google Patents

Grit recovery apparatus Download PDF

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Publication number
WO1999047306A1
WO1999047306A1 PCT/NL1999/000147 NL9900147W WO9947306A1 WO 1999047306 A1 WO1999047306 A1 WO 1999047306A1 NL 9900147 W NL9900147 W NL 9900147W WO 9947306 A1 WO9947306 A1 WO 9947306A1
Authority
WO
WIPO (PCT)
Prior art keywords
grit
dust
screen plate
recovery apparatus
plate
Prior art date
Application number
PCT/NL1999/000147
Other languages
French (fr)
Dutch (nl)
Inventor
Hubertus Lambertus Maria Van Boxtel
Original Assignee
Boxtel Hubertus Lambertus Mari
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
Application filed by Boxtel Hubertus Lambertus Mari filed Critical Boxtel Hubertus Lambertus Mari
Priority to AU29633/99A priority Critical patent/AU2963399A/en
Publication of WO1999047306A1 publication Critical patent/WO1999047306A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/006—Treatment of used abrasive material
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a grit recovery apparatus of the pneumatic kind comprising a suction device for material comprising the grit to be recovered, and a separating device connected with the suction device for separ- ating dust and grit, as well as storage units for the separated dust and grit .
  • a grit recovery apparatus is known in practice and serves for making grit that has been used for grit blasting surfaces of objects to be cleaned, suitable for reuse .
  • Practice has shown that the known grit recovery apparatus does not meet requirements.
  • the known grit recovery apparatus proves to be very sensitive to the dimensions of the grit to be recovered, so that under certain circumstances the apparatus may become clogged and recov- ery of the grit does not seem to be possible.
  • the object of the invention to provide a grit recovery apparatus of the pneumatic kind that is highly tolerant for processing all possible kinds and dimensions of economically recoverable and reusable grit .
  • the grit recovery apparatus according to the invention is characterized in that the separating device is embodied as a tank in which a glancing plate is provided for the deceleration of the material introduced into the separating device, wherein, viewed in the direction of processing, a slanting screen plate is placed behind the glancing plate for taking the material from the top side over the screen plate in order to separate that material into a fine fraction and a coarse fraction, which screen plate divides the space in the tank into a dust discharge space under the screen plate, and a grit removal space above the screen plate, which spaces are in communication with the storage unit for the dust and the storage unit for the grit, respectively.
  • the grit recovery apparatus requires little or no maintenance. This is supported by the embodiment which is characterized in that the glancing plate is provided with wear-resistant coating, preferably of para rubber.
  • the grit recovery apparatus is characterized in that the transition area of the glancing plate and the screen plate is provided with several cascade-configurated plates defining a communication between the dust discharge space and the grit discharge space in the top of the tank. This allows a very effective pre-separation of the relatively light dust and the grit that is substantially suitable for reuse.
  • the efficacy of the separation of dust and grit is further promoted by the measure of providing the grit storage unit with a discharge conduit for dust that is in communication with the dust storage unit .
  • the invention is also embodied in a separate separation device as described above.
  • Said grit recovery apparatus 1 which is of a pneumatic kind, comprises a suction device 2 in the form of a suction tube for the material to be processed comprising the grit that is to be recovered, and connected thereto a separating device 3 for the separation of dust and grit .
  • the grit recovery apparatus further comprises a storage unit 4 for grit and a storage unit 5 for dust .
  • the separating device is formed as a tank in which a glancing plate 6 is positioned for the deceleration of the material introduced into the separating device 3.
  • a slanting screen 3 plate 7 is placed behind the glancing plate 6 for taking the material introduced into the separating device 3 from the top side (indicated by arrow A) over the screen plate 7 in order to separate that material into a fine fraction and a coarse fraction.
  • the screen plate 7 divides the space in the tank 3 into a dust discharge space 8 under the screen plate 7, and a grit discharge space 9 above the screen plate 7, which spaces are in communication with the storage unit 5 for the dust and the storage unit 4 for the grit, respectively.
  • the glancing plate is preferably provided with a wear-resistant coating; para rubber being very suitable for this purpose.
  • the transition area of the glancing plate 6 and the screen plate 7 is provided with several cascade-confi- gurated plates 10 defining a communication between the dust discharge space 8 and the grit discharge space 9 in the top of the tank 3.
  • the dust discharge space 8 is further connected to an additional suction device in the form of a vacuum generator 11.
  • an optional vacuum generator 13 is added for the provision of a higher suction capacity and to allow the use of longer tubes.
  • the vacuum generators serve for the transport of dust in the apparatus and for drawing in the material that is being separated in the grit recovery apparatus into reusable grit and dust, and non-reusable grit, respectively.
  • the material to be processed is conveyed from a collecting well to the separating device 3.
  • the material to be processed will strike the glancing plate 6 which is coated with para rubber. Due to the suction force the lighter dust in the material to be processed will be conducted to the dust storage unit 5 via the discharge opening 14 behind the glancing plate 6 , and via the dust discharge space 8 and conduit 15.
  • the heavier dust and the grit are conducted via the cascade 4 plates, indicated collectively by reference number 10, to the top side of screen plate 7 with the heavier dust and smaller grit falling, respectively being drawn through the screen openings and thus entering the dust discharge space 8.
  • the size of the grit becoming available for reuse is selected by choosing the appropriate mesh size of the screen plate 7, so that the reusable grit stays behind in grit discharge space 9, and rolls from the screen plate 7 via opening 16 into the grit storage unit 4.
  • the grit storage unit 4 is in a known manner provided with a flap or the like, for the discharge of the grit suitable for reuse.
  • the dust storage unit 5 is provided with filter cartridges 17, able to catch the lightest fraction of the dust, so that completely purified air can leave this dust storage unit 5.

Abstract

The invention relates to a grit recovery apparatus of the pneumatic kind comprising a suction device (2) for material comprising the grit to be recovered, and a separating device (3) connected with the suction device (2) for separating dust and grit, as well as storage units (4, 5) for the separated dust and grit. The separating device (3) is embodied as a tank (3) in which a glancing plate (6) is provided for the deceleration of the material introduced into the separating device (3), wherein, viewed in the direction of processing, a slanting screen plate (7) is placed behind the glancing plate (6) for taking the material from the top side over the screen plate (7) in order to separate that material into a fine fraction and a coarse fraction, which screen plate (7) divides the space in the tank (3) into a dust discharge space (8) under the screen plate (7), and a grit removal space (9) above the screen plate (7), which spaces are in communication with the storage unit (5) for the dust and the storage unit (4) for the grit, respectively.

Description

Grit recovery apparatus
The invention relates to a grit recovery apparatus of the pneumatic kind comprising a suction device for material comprising the grit to be recovered, and a separating device connected with the suction device for separ- ating dust and grit, as well as storage units for the separated dust and grit . Such a grit recovery apparatus is known in practice and serves for making grit that has been used for grit blasting surfaces of objects to be cleaned, suitable for reuse . Practice has shown that the known grit recovery apparatus does not meet requirements. The known grit recovery apparatus proves to be very sensitive to the dimensions of the grit to be recovered, so that under certain circumstances the apparatus may become clogged and recov- ery of the grit does not seem to be possible.
It is the object of the invention to provide a grit recovery apparatus of the pneumatic kind that is highly tolerant for processing all possible kinds and dimensions of economically recoverable and reusable grit . To this end the grit recovery apparatus according to the invention is characterized in that the separating device is embodied as a tank in which a glancing plate is provided for the deceleration of the material introduced into the separating device, wherein, viewed in the direction of processing, a slanting screen plate is placed behind the glancing plate for taking the material from the top side over the screen plate in order to separate that material into a fine fraction and a coarse fraction, which screen plate divides the space in the tank into a dust discharge space under the screen plate, and a grit removal space above the screen plate, which spaces are in communication with the storage unit for the dust and the storage unit for the grit, respectively. These surprisingly simple measures have proven to provide a very robust grit recov- ery apparatus which can be utilized successfully with all possible variants of grit and with diverse categories of 2 grit. The grit recovery apparatus according to the invention requires little or no maintenance. This is supported by the embodiment which is characterized in that the glancing plate is provided with wear-resistant coating, preferably of para rubber.
In a particular aspect of the invention the grit recovery apparatus is characterized in that the transition area of the glancing plate and the screen plate is provided with several cascade-configurated plates defining a communication between the dust discharge space and the grit discharge space in the top of the tank. This allows a very effective pre-separation of the relatively light dust and the grit that is substantially suitable for reuse.
Connecting an extractor to the dust discharge space will aid the apparatus to function well.
The efficacy of the separation of dust and grit is further promoted by the measure of providing the grit storage unit with a discharge conduit for dust that is in communication with the dust storage unit . The invention is also embodied in a separate separation device as described above.
The invention will now be explained in more detail with reference to the drawing, in which a single figure shows the grit recovery apparatus according to the inven- tion.
The figure shows a grit recovery apparatus generally indicated by reference number 1. Said grit recovery apparatus 1 which is of a pneumatic kind, comprises a suction device 2 in the form of a suction tube for the material to be processed comprising the grit that is to be recovered, and connected thereto a separating device 3 for the separation of dust and grit . The grit recovery apparatus further comprises a storage unit 4 for grit and a storage unit 5 for dust . The separating device is formed as a tank in which a glancing plate 6 is positioned for the deceleration of the material introduced into the separating device 3. Viewed in the direction of processing of the material which by means of the suction device 2 is introduced into the separating device 3, a slanting screen 3 plate 7 is placed behind the glancing plate 6 for taking the material introduced into the separating device 3 from the top side (indicated by arrow A) over the screen plate 7 in order to separate that material into a fine fraction and a coarse fraction. For this purpose the screen plate 7 divides the space in the tank 3 into a dust discharge space 8 under the screen plate 7, and a grit discharge space 9 above the screen plate 7, which spaces are in communication with the storage unit 5 for the dust and the storage unit 4 for the grit, respectively. The glancing plate is preferably provided with a wear-resistant coating; para rubber being very suitable for this purpose. Further, the transition area of the glancing plate 6 and the screen plate 7 is provided with several cascade-confi- gurated plates 10 defining a communication between the dust discharge space 8 and the grit discharge space 9 in the top of the tank 3. The dust discharge space 8 is further connected to an additional suction device in the form of a vacuum generator 11. The workings of the grit recovery apparatus according to the invention will now be briefly explained. In addition to the vacuum generator 11 which is connected with the dust storage unit 5, an optional vacuum generator 13 is added for the provision of a higher suction capacity and to allow the use of longer tubes. The vacuum generators serve for the transport of dust in the apparatus and for drawing in the material that is being separated in the grit recovery apparatus into reusable grit and dust, and non-reusable grit, respectively. For example, by means of the suction device 2, that is to say the suction tube to which a suction lance may be connected, the material to be processed is conveyed from a collecting well to the separating device 3. The material to be processed will strike the glancing plate 6 which is coated with para rubber. Due to the suction force the lighter dust in the material to be processed will be conducted to the dust storage unit 5 via the discharge opening 14 behind the glancing plate 6 , and via the dust discharge space 8 and conduit 15. The heavier dust and the grit are conducted via the cascade 4 plates, indicated collectively by reference number 10, to the top side of screen plate 7 with the heavier dust and smaller grit falling, respectively being drawn through the screen openings and thus entering the dust discharge space 8. Said heavier dust and smaller grit thus, via conduit 15, following the same path to the dust storage unit 5 as the lighter dust. The size of the grit becoming available for reuse is selected by choosing the appropriate mesh size of the screen plate 7, so that the reusable grit stays behind in grit discharge space 9, and rolls from the screen plate 7 via opening 16 into the grit storage unit 4. The grit storage unit 4 is in a known manner provided with a flap or the like, for the discharge of the grit suitable for reuse. The dust storage unit 5 is provided with filter cartridges 17, able to catch the lightest fraction of the dust, so that completely purified air can leave this dust storage unit 5.
By means of a pneumatic time unit, the filter cartridges for catching the lightest dust fractions regu- larly undergo pneumatic cleaning.

Claims

1. A grit recovery apparatus of the pneumatic kind comprising a suction device for material comprising the grit to be recovered, and a separating device connected with the suction device for separating dust and grit, as well as storage units for the separated dust and grit, characterized in that the separating device is embodied as a tank in which a glancing plate is provided for the deceleration of the material introduced into the separating device, wherein, viewed in the direction of process- ing, a slanting screen plate is placed behind the glancing plate for taking the material from the top side over the screen plate in order to separate that material into a fine fraction and a coarse fraction, which screen plate divides the space in the tank into a dust discharge space under the screen plate, and a grit removal space above the screen plate, which spaces are in communication with the storage unit for the dust and the storage unit for the grit, respectively.
2. A grit recovery apparatus according to claim 1, characterized in that the glancing plate is provided with wear-resistant coating, preferably of para rubber.
3. A grit recovery apparatus according to claim 1 or 2, characterized in that the transition area of the glancing plate and the screen plate is provided with sev- eral cascade-configurated plates defining a communication between the dust discharge space and the grit discharge space in the top of the tank.
4. A grit recovery apparatus according to one of the claims 1-3, characterized in that a suction device is connected with the dust discharge space.
5. A grit recovery apparatus according to one of the preceding claims, characterized in that the grit storage unit is provided with a discharge conduit for dust that is in communication with the dust storage unit. 6
6. A separating device as described as part of the grit recovery apparatus according to one of the claims 1- 3.
PCT/NL1999/000147 1998-03-17 1999-03-17 Grit recovery apparatus WO1999047306A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29633/99A AU2963399A (en) 1998-03-17 1999-03-17 Grit recovery apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1008609A NL1008609C2 (en) 1998-03-17 1998-03-17 Grit recovery installation.
NL1008609 1998-03-17

Publications (1)

Publication Number Publication Date
WO1999047306A1 true WO1999047306A1 (en) 1999-09-23

Family

ID=19766751

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1999/000147 WO1999047306A1 (en) 1998-03-17 1999-03-17 Grit recovery apparatus

Country Status (3)

Country Link
AU (1) AU2963399A (en)
NL (1) NL1008609C2 (en)
WO (1) WO1999047306A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111730505A (en) * 2020-05-26 2020-10-02 盐城市大丰区海达机械有限公司 Discharging mechanism of shot blasting machine
CN113843714A (en) * 2021-09-30 2021-12-28 江苏长沐智能装备有限公司 Burr processor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274783A1 (en) * 1986-12-09 1988-07-20 LTC International B.V. Abrasive blasting apparatus
EP0349490A1 (en) * 1988-07-01 1990-01-03 Aspa Zürich Ag Method and device for preparing granulates
EP0416711A1 (en) * 1989-09-07 1991-03-13 L.T.C. International B.V. Abrasive blasting apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274783A1 (en) * 1986-12-09 1988-07-20 LTC International B.V. Abrasive blasting apparatus
EP0349490A1 (en) * 1988-07-01 1990-01-03 Aspa Zürich Ag Method and device for preparing granulates
EP0416711A1 (en) * 1989-09-07 1991-03-13 L.T.C. International B.V. Abrasive blasting apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111730505A (en) * 2020-05-26 2020-10-02 盐城市大丰区海达机械有限公司 Discharging mechanism of shot blasting machine
CN111730505B (en) * 2020-05-26 2021-11-19 盐城市大丰区海达机械有限公司 Discharging mechanism of shot blasting machine
CN113843714A (en) * 2021-09-30 2021-12-28 江苏长沐智能装备有限公司 Burr processor

Also Published As

Publication number Publication date
NL1008609C2 (en) 1999-09-20
AU2963399A (en) 1999-10-11

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