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WO1998035787A1 - Procede et dispositif pour la formation de boues d'agents abrasifs humides dans un recipient de traitement au jet abrasif - Google Patents

Procede et dispositif pour la formation de boues d'agents abrasifs humides dans un recipient de traitement au jet abrasif Download PDF

Info

Publication number
WO1998035787A1
WO1998035787A1 PCT/DE1998/000193 DE9800193W WO9835787A1 WO 1998035787 A1 WO1998035787 A1 WO 1998035787A1 DE 9800193 W DE9800193 W DE 9800193W WO 9835787 A1 WO9835787 A1 WO 9835787A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
line
overflow
hopper
sieve
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.)
Ceased
Application number
PCT/DE1998/000193
Other languages
German (de)
English (en)
Inventor
Gerhard Kaeding
Horst Karpowsky
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.)
KAESCH OPTIBLAST-SYSTEM GmbH
Original Assignee
KAESCH OPTIBLAST-SYSTEM 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
Application filed by KAESCH OPTIBLAST-SYSTEM GmbH filed Critical KAESCH OPTIBLAST-SYSTEM GmbH
Priority to EP98906831A priority Critical patent/EP1007281A1/fr
Publication of WO1998035787A1 publication Critical patent/WO1998035787A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B24C7/0038—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier the blasting medium being a gaseous stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/54—Mixing liquids with solids wetting solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B24C7/003—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with means for preventing clogging of the equipment

Definitions

  • the invention relates to a method and a corresponding device according to the preambles of claims 1 and 9.
  • Such methods are used using the appropriate devices in slurry blasting for the renovation of, in particular, structures made of steel, concrete and masonry, the blasting medium being separated from impurities and oversize particles at the same time.
  • the facilities for sandblasting by gravity or pressure blasting essentially consist of a funnel-shaped blasting bowl and a hopper placed on the blast pot.
  • the filling funnel and the blasting bowl are connected to each other via a relatively small passage opening, which is closed with a sealing cone during the blasting process.
  • the filling funnel is equipped with a sieve for the separation of oversized abrasive components or other impurities and with a nozzle body for the added water, whereby the sieve and the nozzle body can each be designed individually or as a common component and the sieve can be fixed or vibratable.
  • the jet boiler has a deepest outlet with a downstream mixing valve. This mixing valve is connected to the propellant line leading to the jet nozzle.
  • the blasting media is first placed on the sieve and sprayed with water from the nozzle body.
  • the moistened blasting agent slides through the passage opening into the blasting pot.
  • Low-profile filling funnels are more user-friendly, but because of the relatively flat bottom they have an insufficient slip ability for the blasting agent, which hinders the slurrying process.
  • a funnel with a flat bottom is described in DE 44 30 133 AI for a pressurized jet boiler.
  • a fixed sieve with a water ring line is designed as a component in the filling funnel, the water ring line having nozzles directed towards the filling opening.
  • the blasting agent which was initially still dry, is no longer moistened by the water jets, but by the outstanding water level.
  • the water jets distribute and transport the abrasive sludge only through the small passage opening. This no longer requires such high water jet pressures in the nozzle ring line and also leads to improved mixing and slurrying behavior.
  • the effort to realize the required dynamic pressure in the blasting boiler is extremely low. This dynamic pressure can also be achieved with very little effort by throttling in the overflow line, either by a siphon-like design or / and by a shut-off valve throttling in the open position.
  • a pulsation of the water level or the water supply in the filling funnel is particularly advantageous. This promotes the solution of the dry incrustation of the abrasive and significantly supports the throughput of the abrasive through the sieve.
  • the figure shows a diagram of a blasting device with an unpressurized blasting vessel.
  • This blasting device mainly consists of a blasting vessel 1 in a funnel-shaped design with an outlet connection 2 at the bottom, which is followed by an adjustable mixing valve 3 and an overflow connection 4 located in the upper region of the blasting vessel 1 with a downstream shut-off valve 5.
  • a Filling funnel 6 placed and flanged, both of which are connected to one another by a relatively small passage opening 7 and this passage opening 7 is designed to be closable by a closing cone 8.
  • a nozzle ring line 9 is used, which has a connection to a water pump 13 via a water inlet connection 10, a shut-off valve 11 and a pressure line 12.
  • the nozzles are arranged in the nozzle ring line 9 in such a way that they form jets directed towards the passage opening 7.
  • the slurrying process is further accelerated when the jets hit the passage opening 7 tangentially and thereby form a vortex in the water bath in the filling funnel 6.
  • This nozzle ring line 9 also serves as a support for a stationary screen 14 with a predetermined mesh size, the screen 14 preferably being arched in a sagging manner.
  • the nozzle ring 9 can also have a separate suspension for the screen 13.
  • An overflow line 15 leads from the shut-off valve 5 of the overflow connection 4 to a water reservoir 16 which is connected to the water pump 13 via a suction line 17.
  • a filter element 18 is preferably inserted in the water storage container 16.
  • the overflow line 15 is designed like a siphon in such a way that the highest point of the overflow line 15 which determines the water level is aligned with a height above the sieve 14 in the filling funnel 6.
  • the water pump 13 has a pneumatic drive 19, which is supplied by a motor-driven compressor 20. This compressor 20 is also connected to a jet nozzle 23 via a shut-off valve 21 and a propellant line 22.
  • a blasting agent line 24 coming from the mixing valve 3 of the blasting boiler 1 opens into the blowing agent line 22.
  • the compressor 20 is first switched on and thus the propellant line 22 is supplied with air and, by simultaneously driving the water pump 13, the pressure line 12 is supplied with water.
  • the shut-off valves 11 and 21 are still closed.
  • shut-off valve 11 By opening the shut-off valve 11, water is pumped out of the water storage container 16 and reaches the water inlet connection 10 and thus to the nozzle ring line 9 under pressure. The water exits there in the form of a jet and flows through the passage opening 7 into the jet boiler 1. Blasting agent is then placed on the sieve 14, so that the blasting agent initially falls partly through the action of the water jet through the sieve 14 and is flushed from the flowing water in the filling funnel 6 through the passage opening 7 into the blasting vessel 1. The water level in the jet boiler rises until the water flows into the water reservoir 16 via the siphon-like overflow line 15, whereby the water circuit is closed for the filling process. The overflow line 15 is set so that the water level in the hopper 6 covers the sieve 14.
  • blasting agent seeps automatically in the vortex of the water bath in the filling funnel 6 through the sieve 14 onto the bottom of the filling funnel 6 and is washed into the blasting kettle 1 by the flowing water, where it settles on the bottom.
  • the filling process is ended when the desired amount of abrasive is in the blasting vessel 1. Then the passage opening 7 is closed with the closing cone 8 and the blasting process can begin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

Les procédés et dispositifs utilisés jusqu'à présent pour la formation de boues constituant des agents abrasifs humides dans un récipient de traitement au jet abrasif présentent un mauvais comportement à la formation de boues ou nécessitent des moyens coûteux pour améliorer un tel comportement. L'invention a en conséquence pour objet un nouveau procédé caractérisé en ce qu'on produit dans le récipient de traitement (1) une pression d'eau permettant de faire monter le niveau de l'eau dans l'entonnoir d'introduction (6) pour l'amener à un niveau situé le plus haut possible au-dessus du tamis (14). A cet effet, le dispositif pour la mise en oeuvre de ce procédé est caractérisé en ce que la conduite de trop-plein (15) présente des moyens correspondants de réglage et de retenue.
PCT/DE1998/000193 1997-02-13 1998-01-22 Procede et dispositif pour la formation de boues d'agents abrasifs humides dans un recipient de traitement au jet abrasif Ceased WO1998035787A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98906831A EP1007281A1 (fr) 1997-02-13 1998-01-22 Procede et dispositif pour la formation de boues d'agents abrasifs humides dans un recipient de traitement au jet abrasif

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19705401.3 1997-02-13
DE19705401A DE19705401A1 (de) 1997-02-13 1997-02-13 Verfahren und Vorrichtung zum Einschlämmen von feuchtem Strahlmittel in einen Strahlkessel

Publications (1)

Publication Number Publication Date
WO1998035787A1 true WO1998035787A1 (fr) 1998-08-20

Family

ID=7820058

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/000193 Ceased WO1998035787A1 (fr) 1997-02-13 1998-01-22 Procede et dispositif pour la formation de boues d'agents abrasifs humides dans un recipient de traitement au jet abrasif

Country Status (3)

Country Link
EP (1) EP1007281A1 (fr)
DE (1) DE19705401A1 (fr)
WO (1) WO1998035787A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1208944A1 (fr) * 2000-11-24 2002-05-29 ANT Applied New Technologies AG Procede de remplissage d'un reservoir sous pression et dispositif d'obtention d'un jet de boue

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB731117A (en) * 1952-05-31 1955-06-01 Mariblast Corp Method and apparatus for feeding a fluid abrading material
WO1987002290A1 (fr) * 1985-10-10 1987-04-23 The British Hydromechanics Research Association Alimentation en materiau abrasif
EP0338509A1 (fr) * 1988-04-22 1989-10-25 STERN, Leif Einar Dispositif pour nettoyer des roues de véhicule
EP0359701A2 (fr) * 1988-09-16 1990-03-21 Daniel Mattmann Procédé et dispositif de préparation et réutilisation de sable dans un procédé de sablage par l'eau à haute pression
DE9103701U1 (de) * 1991-03-26 1991-07-04 Abrex Oberflächentechnik GmbH, 2330 Windeby Feuchtsandstrahler
US5195280A (en) * 1987-04-09 1993-03-23 Gagemarch Limited Abrasive blasting apparatus
US5283991A (en) * 1992-09-08 1994-02-08 Josef Keizers Sandblasting method and a moist-sand blasting apparatus
DE4430133A1 (de) * 1994-08-25 1996-02-29 Hubert Busch Strahlkessel für Trocken- und Naßstrahlverfahren

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB731117A (en) * 1952-05-31 1955-06-01 Mariblast Corp Method and apparatus for feeding a fluid abrading material
WO1987002290A1 (fr) * 1985-10-10 1987-04-23 The British Hydromechanics Research Association Alimentation en materiau abrasif
US5195280A (en) * 1987-04-09 1993-03-23 Gagemarch Limited Abrasive blasting apparatus
EP0338509A1 (fr) * 1988-04-22 1989-10-25 STERN, Leif Einar Dispositif pour nettoyer des roues de véhicule
EP0359701A2 (fr) * 1988-09-16 1990-03-21 Daniel Mattmann Procédé et dispositif de préparation et réutilisation de sable dans un procédé de sablage par l'eau à haute pression
DE9103701U1 (de) * 1991-03-26 1991-07-04 Abrex Oberflächentechnik GmbH, 2330 Windeby Feuchtsandstrahler
US5283991A (en) * 1992-09-08 1994-02-08 Josef Keizers Sandblasting method and a moist-sand blasting apparatus
DE4430133A1 (de) * 1994-08-25 1996-02-29 Hubert Busch Strahlkessel für Trocken- und Naßstrahlverfahren

Also Published As

Publication number Publication date
EP1007281A1 (fr) 2000-06-14
DE19705401A1 (de) 1998-08-20

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