CA1153365A - Mixer with orthogonal spin and swing axes - Google Patents
Mixer with orthogonal spin and swing axesInfo
- Publication number
- CA1153365A CA1153365A CA000345282A CA345282A CA1153365A CA 1153365 A CA1153365 A CA 1153365A CA 000345282 A CA000345282 A CA 000345282A CA 345282 A CA345282 A CA 345282A CA 1153365 A CA1153365 A CA 1153365A
- Authority
- CA
- Canada
- Prior art keywords
- storage container
- container
- axis
- stand
- tilting motion
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/008—Apparatus specially adapted for mixing or disposing radioactively contamined material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/10—Mixers with rotating receptacles with receptacles rotated about two different axes, e.g. receptacles having planetary motion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
- B01F29/403—Disposition of the rotor axis
- B01F29/4033—Disposition of the rotor axis inclined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
- B01F29/403—Disposition of the rotor axis
- B01F29/4034—Disposition of the rotor axis variable, e.g. tiltable during the operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
- B01F31/20—Mixing the contents of independent containers, e.g. test tubes
- B01F31/23—Mixing the contents of independent containers, e.g. test tubes by pivoting the containers about an axis
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Processing Of Solid Wastes (AREA)
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
Abstract
ABSTRACT
An installation for mixing pumpable radioactive wastes with a solidifier substance in which the solidifier and radioactive wastes are introduced into a storage container which can be retained on a stand. The stand includes tilting means and also driven roller means for rotating the container and against which it is supported when it is in tilted position.
The tilting means provides a repetitive swinging motion to the stand so that the container is oscillated about an axis orthogonal to the axis about which it it rotated by driven roller rotating means. The combination of these two motions for the container results in greatly improved mixing.
An installation for mixing pumpable radioactive wastes with a solidifier substance in which the solidifier and radioactive wastes are introduced into a storage container which can be retained on a stand. The stand includes tilting means and also driven roller means for rotating the container and against which it is supported when it is in tilted position.
The tilting means provides a repetitive swinging motion to the stand so that the container is oscillated about an axis orthogonal to the axis about which it it rotated by driven roller rotating means. The combination of these two motions for the container results in greatly improved mixing.
Description
il53365 SYSTEM FOR MIXING PUMPABLE RADIOACTIVE WASTES
The invention relates generally to an installation far mixing pumpable radioactive wastes with a solidifier substance in a storage container. "Pump-able" radioactive waste i9 herein also to be understood to mean waste whlch has been rendered pumpable.
Installations of this type are already known and in DE-OS 27 20 342 published 9 November 1978 in the name Steag Kernenergie GmbH radioactive wastes and a solidifler are introduced into a storage container in which the mixing process is to take place; the container may already be mounted in a storage container stand. At this point, or subsequently, the stand and the storage container installed in it are swung through an angle of 90 , so that the con-tainer axis and thus the axis of rotation of the container are parallel for - the purpose of mixing the components contained thereinO This has proved satis-factory and works well provided there is sufficient unfilled space inside the storage container after the materials to be mixed have been introduced. The known system suffers from the disadvantages that the mixture dispersion is not always satisfactory, and the mixing time is unnecessarily long to achieve a specific mixing effect.
An ob~ect of the invention is to improve upon known installations of this type so that very intensive mixing can be achieved in reduced mixing time, with concomitant reduction of unfilled space.
The apparatus here described includes a tilting motion arrangement in the form of a swing or rocking drive which can be activated during rotation of the storage container. In a preferred embodiment of the invention the swing drive can move freely through an arc from O to a minlmum of 90 , O corres-ponding to the position of the storage container stand with the axis of the l~S336S
lnstalled storage contalner vertlcal, and 90 to the posltion wlth the axis horlzontal. In order to adapt the lnstallatlon of the wldest varlety of condl-tlons and to :, i - la -~ 1153365 various mlx components, ~he system Eor rotating the storage container has means for varying the speed of rotation during operation and the swing drive system includes means for adjusting the oscillation frequency of swlng and/or the swing amplitude during operation. In general, the rotntlonal speed of the storage container is high in relation to the swing frequency. ~djustment during operation means that these settings or adjustments can be made when rotation is taking place. Suitable systems for providing such ad~ustment are already familiar in power train technology and require no detailed description here.
~ We have discovered that the mixing effect achieved in the mix components during rotational motion of the container using the prior art systems can be greatly improved if diagonally directed mixing forces can be superposed on the single direction circumferential mixing forces. This is achieved in our apparatus by the additional swinging or rocking motion. The mixing effect achieved by the combination of rotational movement and swinging movement is so intensive ' that a very homogenous mixture results; in the solidified state this mixture is almost completely free of undesirable pore voids. In addition, the unfilled space in the container referred to above is reduced by this procedure.
A typical installation as described above permits a process for solidifying pumpable radioactive wastes in a storage container, in which the radioactive wastes and cement as a solidifier are measured into a storage container and then mixed in the container. Typically the radioactive wastes are drawn into the storage container by partial vacuum.
- Thus dry cement is introduced into the container, next a partial vacuum is created in the storage container, the storage container is then isolated from the vacuum system; next a quantity of radioactive wastes, determined by the level of vacuum in the storage container, is drawn into the storage container; and finally the storage container is tilted and caused to ` ` llS3365 A~
- rotate and rock, to mix the radioactive wastes and the cement.
More particularly in accordance with the invention there is provided - apparatus for mixing pumpable radioactive wastes with a solidifier substance, which comprises;
a storage container for receiving said wastes and said solidifier, a retaining stand for said storage container, means on ssid stand for rotating the storage container about a fir~t axis, means for imparting a tilting motion to the storage container about an axis orthogonal to said first axis, said tilting motion means being characterised by providing repetitive swinging motion to said container about said orthogonal axis during rotation of the storage container, and having a freedom of swing of~
0 to-et ~ 90 wherein 0 represents the position of the stand in which the first axis is vertical, and 90 represents the position of the stand in which the first axis is horizontal, and said means on said stand for rotating the storage container comprising driven roller means, the container being received by and supported - against said roller means during tilting motion imparted by said tilting ;~ 20 motion means. The apparatus may include means for setting the speed of ;' rotation of the container during operation and the tilting motion means may ,'.:
include a control device for setting swing oscillation frequency and/or ;~ amplitude during operation. ,`'.
- 2a -.~
.. ,~
.~
:
Specific embodiments of the invention wlll now be described having reference to the accompanying drawings in which;
Figure 1 is a side view partly in section of a stora~e contalner and stand with the rotation axis of the container arranged vertically;
Figure 2 is a vlew similar to that of Figure 1, with the container axis horizontal; and Figure 3 is a view similar to that of Figures 1 and 2 with the con-tainer axis in an intermediate position.
The apparatus illustrated in the drawings is employed for mixing radioactive material, which is pumpable or has been prepared so as to be pump-able, with a solidlfier in a storage container 1. The substances may already be present in the storage container 1 or they may be introduced into the con-tainer 1 ~ust prlor to the subsequent steps of mixing. The container 1 is received in a stand 2, and a system 3 is provided for rotating the container 1 about its axis 4, colinear wlth shaft 15, in the stand 2. A mechanism 5 imparts a tilting motlon to the stand 2 about an axis 6 orthogonal to the container axis 4.
A feed system for the radioactive wastes can be included at 13 and an evacuating system for producing the partial vacuum in the storage container for drawing in the radioactive wastes included at 14. It can be seen that the installation is configured in such a way that the feed system for the radio-; active wastes can also serve to evacuate the storage container and is provided with at least one twist-type coupling which is axially connected to the con-tainer shaft at the storage container. ~ixing paddles or devices can be arranged or formed in the interior of the storage container.
The tilt motion drive mechanism comprises a motor and a drive train 9.
Rotation drive for the container 1 is applied by driven rollers, driven by means .
' ,i.
, ` 115336S
not show~ and upon whlch the storage contalner 1 rests when in any inclined state as shown typically by Figures 2 and 3. The container 1 is also mounted by supports 8, provided with suitable bearings at 12, for hollow filling shaEt 15. The container can thus be rotated about axis 4 upon ~ilting and resting against rollers 7.
The tilting drive provides a rocking or swinging motion during rotation of the storage container 1 by rollers 7. Comparison of Figure 1 with Figure 2 reveals that--as indicated by the arrow 10--the tilting drive has a freedom of swing from O tc at least 90 for the container axis 4, 0 corresponding to the position of the stand 2 with the axis of the container 1 vertical, and 90 to the position wi~h the axis 4 horizontal. Figure 3 indicates that within the range from O to at least 90 it is possible to select a sub-range for tilting motion as indicated by the arrow 11 in between the extremes of 0 and 90.
The system 3 includes means, not shown, for settin& the rate of rotation of the container 1 at a chosen value, and the tilting drive 9 also includes a control device for setting the swing oscillation frequency and/or amplitude during operation.
,....
,. '~ .
.
' .
The invention relates generally to an installation far mixing pumpable radioactive wastes with a solidifier substance in a storage container. "Pump-able" radioactive waste i9 herein also to be understood to mean waste whlch has been rendered pumpable.
Installations of this type are already known and in DE-OS 27 20 342 published 9 November 1978 in the name Steag Kernenergie GmbH radioactive wastes and a solidifler are introduced into a storage container in which the mixing process is to take place; the container may already be mounted in a storage container stand. At this point, or subsequently, the stand and the storage container installed in it are swung through an angle of 90 , so that the con-tainer axis and thus the axis of rotation of the container are parallel for - the purpose of mixing the components contained thereinO This has proved satis-factory and works well provided there is sufficient unfilled space inside the storage container after the materials to be mixed have been introduced. The known system suffers from the disadvantages that the mixture dispersion is not always satisfactory, and the mixing time is unnecessarily long to achieve a specific mixing effect.
An ob~ect of the invention is to improve upon known installations of this type so that very intensive mixing can be achieved in reduced mixing time, with concomitant reduction of unfilled space.
The apparatus here described includes a tilting motion arrangement in the form of a swing or rocking drive which can be activated during rotation of the storage container. In a preferred embodiment of the invention the swing drive can move freely through an arc from O to a minlmum of 90 , O corres-ponding to the position of the storage container stand with the axis of the l~S336S
lnstalled storage contalner vertlcal, and 90 to the posltion wlth the axis horlzontal. In order to adapt the lnstallatlon of the wldest varlety of condl-tlons and to :, i - la -~ 1153365 various mlx components, ~he system Eor rotating the storage container has means for varying the speed of rotation during operation and the swing drive system includes means for adjusting the oscillation frequency of swlng and/or the swing amplitude during operation. In general, the rotntlonal speed of the storage container is high in relation to the swing frequency. ~djustment during operation means that these settings or adjustments can be made when rotation is taking place. Suitable systems for providing such ad~ustment are already familiar in power train technology and require no detailed description here.
~ We have discovered that the mixing effect achieved in the mix components during rotational motion of the container using the prior art systems can be greatly improved if diagonally directed mixing forces can be superposed on the single direction circumferential mixing forces. This is achieved in our apparatus by the additional swinging or rocking motion. The mixing effect achieved by the combination of rotational movement and swinging movement is so intensive ' that a very homogenous mixture results; in the solidified state this mixture is almost completely free of undesirable pore voids. In addition, the unfilled space in the container referred to above is reduced by this procedure.
A typical installation as described above permits a process for solidifying pumpable radioactive wastes in a storage container, in which the radioactive wastes and cement as a solidifier are measured into a storage container and then mixed in the container. Typically the radioactive wastes are drawn into the storage container by partial vacuum.
- Thus dry cement is introduced into the container, next a partial vacuum is created in the storage container, the storage container is then isolated from the vacuum system; next a quantity of radioactive wastes, determined by the level of vacuum in the storage container, is drawn into the storage container; and finally the storage container is tilted and caused to ` ` llS3365 A~
- rotate and rock, to mix the radioactive wastes and the cement.
More particularly in accordance with the invention there is provided - apparatus for mixing pumpable radioactive wastes with a solidifier substance, which comprises;
a storage container for receiving said wastes and said solidifier, a retaining stand for said storage container, means on ssid stand for rotating the storage container about a fir~t axis, means for imparting a tilting motion to the storage container about an axis orthogonal to said first axis, said tilting motion means being characterised by providing repetitive swinging motion to said container about said orthogonal axis during rotation of the storage container, and having a freedom of swing of~
0 to-et ~ 90 wherein 0 represents the position of the stand in which the first axis is vertical, and 90 represents the position of the stand in which the first axis is horizontal, and said means on said stand for rotating the storage container comprising driven roller means, the container being received by and supported - against said roller means during tilting motion imparted by said tilting ;~ 20 motion means. The apparatus may include means for setting the speed of ;' rotation of the container during operation and the tilting motion means may ,'.:
include a control device for setting swing oscillation frequency and/or ;~ amplitude during operation. ,`'.
- 2a -.~
.. ,~
.~
:
Specific embodiments of the invention wlll now be described having reference to the accompanying drawings in which;
Figure 1 is a side view partly in section of a stora~e contalner and stand with the rotation axis of the container arranged vertically;
Figure 2 is a vlew similar to that of Figure 1, with the container axis horizontal; and Figure 3 is a view similar to that of Figures 1 and 2 with the con-tainer axis in an intermediate position.
The apparatus illustrated in the drawings is employed for mixing radioactive material, which is pumpable or has been prepared so as to be pump-able, with a solidlfier in a storage container 1. The substances may already be present in the storage container 1 or they may be introduced into the con-tainer 1 ~ust prlor to the subsequent steps of mixing. The container 1 is received in a stand 2, and a system 3 is provided for rotating the container 1 about its axis 4, colinear wlth shaft 15, in the stand 2. A mechanism 5 imparts a tilting motlon to the stand 2 about an axis 6 orthogonal to the container axis 4.
A feed system for the radioactive wastes can be included at 13 and an evacuating system for producing the partial vacuum in the storage container for drawing in the radioactive wastes included at 14. It can be seen that the installation is configured in such a way that the feed system for the radio-; active wastes can also serve to evacuate the storage container and is provided with at least one twist-type coupling which is axially connected to the con-tainer shaft at the storage container. ~ixing paddles or devices can be arranged or formed in the interior of the storage container.
The tilt motion drive mechanism comprises a motor and a drive train 9.
Rotation drive for the container 1 is applied by driven rollers, driven by means .
' ,i.
, ` 115336S
not show~ and upon whlch the storage contalner 1 rests when in any inclined state as shown typically by Figures 2 and 3. The container 1 is also mounted by supports 8, provided with suitable bearings at 12, for hollow filling shaEt 15. The container can thus be rotated about axis 4 upon ~ilting and resting against rollers 7.
The tilting drive provides a rocking or swinging motion during rotation of the storage container 1 by rollers 7. Comparison of Figure 1 with Figure 2 reveals that--as indicated by the arrow 10--the tilting drive has a freedom of swing from O tc at least 90 for the container axis 4, 0 corresponding to the position of the stand 2 with the axis of the container 1 vertical, and 90 to the position wi~h the axis 4 horizontal. Figure 3 indicates that within the range from O to at least 90 it is possible to select a sub-range for tilting motion as indicated by the arrow 11 in between the extremes of 0 and 90.
The system 3 includes means, not shown, for settin& the rate of rotation of the container 1 at a chosen value, and the tilting drive 9 also includes a control device for setting the swing oscillation frequency and/or amplitude during operation.
,....
,. '~ .
.
' .
Claims (2)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for mixing pumpable radioactive wastes with a solidifier substance, which comprises;
a storage container for receiving said wastes and said solidifier, a retaining stand for said storage container, means on said stand for rotating the storage container about a first axis, means for imparting a tilting motion to the storage container about an axis orthogonal to said first axis, said tilting motion means being characterised by providing repetitive swinging motion to said container about said orthogonal axis during rotation of the storage container, and having a freedom of swing of substantially 0° to 90° wherein 0° represents the position of the stand in which the first axis is vertical, and 90° represents the position of the stand in which the first axis is horizontal, and said means on said stand for rotating the storage container comprising driven roller means, the container being received by and supported against said roller means during tilting motion imparted by said tilting motion means.
a storage container for receiving said wastes and said solidifier, a retaining stand for said storage container, means on said stand for rotating the storage container about a first axis, means for imparting a tilting motion to the storage container about an axis orthogonal to said first axis, said tilting motion means being characterised by providing repetitive swinging motion to said container about said orthogonal axis during rotation of the storage container, and having a freedom of swing of substantially 0° to 90° wherein 0° represents the position of the stand in which the first axis is vertical, and 90° represents the position of the stand in which the first axis is horizontal, and said means on said stand for rotating the storage container comprising driven roller means, the container being received by and supported against said roller means during tilting motion imparted by said tilting motion means.
2. Apparatus as defined in claim 1, said storage container rotating means including means for setting speed of rotation of said container during operation, and said tilting motion means including a control device for setting swing oscillation frequency and/or amplitude during operation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2905095A DE2905095C2 (en) | 1979-02-10 | 1979-02-10 | "Process for mixing pumpable radioactive waste with a solidifying agent" |
| DEP2905095.1 | 1979-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1153365A true CA1153365A (en) | 1983-09-06 |
Family
ID=6062631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000345282A Expired CA1153365A (en) | 1979-02-10 | 1980-02-08 | Mixer with orthogonal spin and swing axes |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE881603A (en) |
| CA (1) | CA1153365A (en) |
| CH (1) | CH643968A5 (en) |
| DE (1) | DE2905095C2 (en) |
| ES (1) | ES488404A0 (en) |
| FR (1) | FR2448769A1 (en) |
| SE (1) | SE440708B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9222614B2 (en) | 2013-05-10 | 2015-12-29 | Transport Logistics International, Inc. | Tilt-roll table for use in cleaning UF6 cylinders |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2720342B2 (en) * | 1977-05-06 | 1979-08-30 | Steag Kernenergie Gmbh, 4300 Essen | Process and system for solidifying pumpable radioactive waste in a landfill container |
-
1979
- 1979-02-10 DE DE2905095A patent/DE2905095C2/en not_active Expired
-
1980
- 1980-01-29 CH CH69380A patent/CH643968A5/en not_active IP Right Cessation
- 1980-02-07 SE SE8000989A patent/SE440708B/en not_active IP Right Cessation
- 1980-02-08 CA CA000345282A patent/CA1153365A/en not_active Expired
- 1980-02-08 FR FR8002777A patent/FR2448769A1/en active Granted
- 1980-02-08 ES ES488404A patent/ES488404A0/en active Granted
- 1980-02-08 BE BE2/58393A patent/BE881603A/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9222614B2 (en) | 2013-05-10 | 2015-12-29 | Transport Logistics International, Inc. | Tilt-roll table for use in cleaning UF6 cylinders |
Also Published As
| Publication number | Publication date |
|---|---|
| SE440708B (en) | 1985-08-12 |
| FR2448769A1 (en) | 1980-09-05 |
| CH643968A5 (en) | 1984-06-29 |
| ES8102757A1 (en) | 1981-02-16 |
| DE2905095A1 (en) | 1980-08-14 |
| ES488404A0 (en) | 1981-02-16 |
| FR2448769B1 (en) | 1984-11-16 |
| BE881603A (en) | 1980-05-30 |
| SE8000989L (en) | 1980-08-11 |
| DE2905095C2 (en) | 1982-04-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |