CA2309237C - Tank with containment and overflow - Google Patents
Tank with containment and overflow Download PDFInfo
- Publication number
- CA2309237C CA2309237C CA 2309237 CA2309237A CA2309237C CA 2309237 C CA2309237 C CA 2309237C CA 2309237 CA2309237 CA 2309237 CA 2309237 A CA2309237 A CA 2309237A CA 2309237 C CA2309237 C CA 2309237C
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- Prior art keywords
- tank
- assembly
- base chamber
- liquid
- secondary containment
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/24—Spillage-retaining means, e.g. recovery ponds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A liquid storage tank assembly comprises a primary tank for storing a liquid; an overflow tank operatively connected to the primary tank such that when the liquid in the primary tank rises to a full capacity level of the primary tank, excess liquid flows into the overflow tank; and a secondary containment tank enclosing the primary tank and the overflow tank such that liquid leaking from the primary tank or the overflow tank is contained in the secondary containment tank.
Provision is made to fix an auxiliary tank in the base of a tank assembly for storage of a second liquid, which may also be protected by containment. The tank assembly may be insulated and heated.
Provision is made to fix an auxiliary tank in the base of a tank assembly for storage of a second liquid, which may also be protected by containment. The tank assembly may be insulated and heated.
Description
F&K 599-05-O1 TANK WITH CONTAINMENT & OVERFLOW
s The invention is in the field of liquid storage containers and in particular such liquid storage containers which provide secondary containment of the stored liquid.
to Liquid storage containers, or tanks, are commonly used to store liquid for many industrial and commercial purposes.
Where hazardous or potentially damaging liquids are stored, the tank assembly must include provision for secondary ~s containment of the liquid. It is desirable as well to containing overflow from the tank.
Conventionally the secondary containment and overflow provision are provided by a double walled tank, essentially a 2o tank within a tank. In conventional tank assemblies, any overflow liquid from overfilling the primary tank is directed into the secondary containment tank such that essentially the F&K 599-05-O1 overflow tank and the secondary containment tank are the same tank. Thus in the conventional tank assemblies there is no secondary containment provision for the contents of the overflow tank. Should the primary tank begin to leak, any leaking liquid will be caught by the secondary containment tank. For liquid to escape into the environment from the primary tank two leaks must occur, one in the primary tank, and a second leak in the secondary containment tank.
1o Liquid from any overflow tank, however, can escape into the environment where only one leak occurs, that being in the secondary containment tank.
It is also common at certain sites to require two tanks for two separate liquids, such as at a petroleum well site, during the winter, where a water storage tank is required as well as a methanol tank to supply methanol which is circulated in the lines to prevent freezing. Diesel fuel is commonly kept in an auxiliary tank as well. Conventionally the auxiliary tank 2o is separate from the primary tank assembly. Transport of the second auxiliary tank is problematic as it must be handled and transported separately from the primary tank assembly. The auxiliary tank is also not protected by any secondary - F&K 599-05-O1 containment system.
Insulated tank assemblies are often required for various applications in extreme conditions.
SUi~iARY OF THE INVENTION
It is an object of the present invention to provide a tank assembly with an overflow tank that is contained such that io liquids leaking from the overflow tank do not escape into the environment.
It is a further object of the present invention to provide a tank assembly which includes storage tanks for two separate liquids for easy transport, and where both tanks may be protected by secondary containment such that liquid leaking from either tank does not escape into the environment.
The present invention provides a liquid storage tank assembly 2o comprising a primary tank for storing a liquid; an overflow tank operatively connected to the primary tank such that when the liquid in the primary tank rises to a full capacity level - F&K 599-05-O1 of the primary tank, excess liquid flows into the overflow tank; and a secondary containment tank enclosing the primary tank and the overflow tank such that liquid leaking from the primary tank or the overflow tank is contained in the secondary containment tank.
The tank assembly may be configured in any convenient shape, and may be provided with a contained, attached auxiliary tank, and with insulation and heat if required.
In a second aspect the invention provides a liquid storage tank assembly comprising a primary tank for storing a first liquid; a secondary containment tank enclosing the primary tank such that liquid leaking from the primary tank is i5 contained in a containment chamber between the inner tank and the secondary containment tank; a hollow base for supporting the tank assembly, the hollow base attached to the secondary containment tank to form a base chamber; and an auxiliary tank for storage of a second liquid, the auxiliary tank fixed to 2o the assembly inside the base chamber. Where methanol is stored in the auxiliary tank, containment is not critical, and the auxiliary tank may share a wall with the base. Where diesel or other hazardous products are stored in the auxiliary F&K 599-05-O1 tank it may be a totally separate tank fixed inside the base chamber such that liquid leaking from the auxiliary tank may be contained in the base chamber.
DESCRIPTION OF THE DRAWINGS:
While the invention is claimed in the concluding portions hereof, preferred embodiments are provided in the accompanying detailed description which may be best understood in 1o conjunction with the accompanying diagrams where like parts in each of the several diagrams are labeled with like numbers, and where:
Fig. 1 is perspective view of an insulated tank assembly 1s embodying the invention;
Fig. 2 is a schematic side view showing the operation of the tank assembly of Fig. 1.
2o Fig. 3 is a schematic end view showing the operation of the tank assembly of Fig. 1.
F&K 599-05-O1 Figs . 4 and 4A are schematic top and side views of an alternate vertical cylindrical embodiment;
Figs. 5 and 5A are schematic top and side views of an alternate rectangular embodiment;
Figs. 6 and 6A are schematic end and side views illustrating the location of the insulation in the tank assembly of Fig. 1.
Figs. 7 and 7A are schematic end and side views illustrating an un-insulated tank assembly.
Figs. 8 and 8A are schematic end and side views illustrating an alternate tank assembly with no overflow tank, and showing an economical auxiliary tank that is not secondarily contained.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS:
Fig. 1 illustrates a liquid storage tank assembly 1 of the invention comprising a primary tank 2 for storing a liquid L;
F&K 599-05-O1 an overflow tank 3 operatively connected to the primary tank 2 by an overflow port 4 such that when liquid L in the primary tank 2 rises to a full capacity level F, excess liquid L flows through the overflow port 4 and into the overflow tank 3.
Figs. 2 and 3 schematically illustrate the operation of the tank assembly 1.
Typically secondary containment tanks are built around the primary tank, with little or no actual gap between the two 1o tanks, or "skin on skin". The gap is exaggerated in the illustrations herein for ease of demonstration.
A secondary containment tank 5 encloses the primary tank 2 and the overflow tank 3 such that liquid L leaking from the primary tank 2 or the overflow tank 3 is contained in the secondary containment tank 5.
Conversely as well, should the primary tank 2 rupture such that liquid L is leaking from the primary tank 2 into the 2o secondary containment tank 5, during filling the liquid level could rise in both the primary and secondary containment tanks 2, 5 at the same time. When the liquid level in the primary - F&K 599-05-O1 and secondary containment tanks 2, 5 rises to a level approaching a full capacity level F of the secondary containment tank 5, excess liquid L flows through the overflow port 4 into the overflow tank 3.
The overflow tank 3 thereby acts as an overflow for both the primary and secondary containment tanks 2, 5 and the secondary containment tank 5 acts as containment for both the primary and overflow tanks 2, 3.
The primary and overflow tanks 2, 3 are formed by dividing an inner tank 6 with a substantially vertical partition wall 7 into a first portion, being the primary tank 2, and a second portion, being the overflow tank 3. The partition wall 7 defines the overflow port 4 in an upper portion thereof at a level corresponding to the full capacity level F of the primary tank 2.
The inner tank 6 is smaller than the secondary containment ao tank 5, and is mounted inside the secondary containment tank 5 such that a containment chamber 8 is formed between the tanks 5, 6 to contain liquid L leaking from a rupture in the F&K 599-05-O1 primary tank 2 or overflow tank 3.
For convenience and economy of manufacture, the inner tank 6 and secondary containment tank 5 can be cylindrical and mounted substantially concentrically in a substantially horizontal orientation, as illustrated in Figs. 7 and 7A.
Alternatively the tank assembly 1 could comprise vertically oriented cylindrical inner and secondary containment tanks 5, io 6 as illustrated in Figs. 4 and 4A, or rectangular tanks as illustrated in Figs. 5 and 5A. Many convenient shapes for particular purposes could be employed to embody the invention, and all such variations in shape are intended to fall within the scope of the present invention.
is The tank assembly 1 further comprises a hollow base 9 for supporting the tank assembly 1. The hollow base 9 is attached to the secondary containment tank 5 to form a base chamber 10, having a base chamber floor 10f, two opposite substantially 2o vertical base chamber end walls 10e, two opposite substantially vertical base chamber side walls 10s, and a base chamber ceiling 10c. The base chamber ceiling comprises an F&K 599-05-O1 outer surface of the secondary containment tank 5.
In the illustrated embodiment of Fig. 1, as seen in Figs. 6 and 6A, the tank assembly is insulated so as to thermally isolate the primary tank 2 and base chamber 10 from an ambient temperature, and further comprises a heater mounted 13 inside the base chamber 10 and operative to heat the base chamber and a bottom portion 5b of the secondary containment tank 5.
io To allow effective heating of the liquid in the primary tank 2, the secondary containment tank 5 comprises a lower portion 5b below a mid-point M positioned immediately adjacent the primary tank 2 in the conventional "skin on skin" orientation.
is This allows heat to pass relatively easily from the base chamber 10 to the primary tank 2. To provide for insulation of the primary tank 2, being the inner tank 6, an upper portion of the secondary containment tank 5a above the mid-point M is positioned to form a first insulation chamber 30a 2o between the inner and outer tanks 6, 5. The secondary containment tank 5 is also positioned such that second and third cylindrical insulation chambers 30b, 30c are formed F&K 599-05-O1 between the inner tank 6 and secondary containment tank 5 at opposite ends of said tank assembly 1.
The insulation chambers may be insulated with particulate, foam, fibreglass batt, or other conventional insulation 14.
If the primary or overflow tanks 2, 3 leak into the secondary containment tank 5, the insulation 14 may come into contact with the leaked liquid. Insulation that is not subject to damage may be used, or same may then require replacement.
io The base chamber side walls lOs extend upwards from the base chamber floor lOf to the mid-point M, approximately one half way up the secondary containment tank 5 along each side thereof. A layer of insulation 17 is also sprayed or otherwise applied to an inner surface of the base chamber end walls 10e and side walls 10s. The floor lOf is generally left un-insulated but could easily be insulated if desired. There is no insulation between the base chamber 10 and the secondary containment tank 5, allowing heat from the base chamber 10 to 2o heat the secondary containment tank 5.
The illustrated embodiment provides an insulated tank where F&K 599-05-O1 all the insulation is protected from damage by contact with equipment and so forth by being inside the outer surface of the tank assembly 1.
The tank assembly 1 further comprises an auxiliary tank 11 for storage of a second liquid. The auxiliary tank is fixed to the assembly 1 inside the base chamber 10 such that liquid leaking from the auxiliary tank 11 is contained in the base chamber 10. An access door 12 into the base chamber 10 is io mounted above the base chamber floor lOf such that all liquid stored in the auxiliary tank 11 can be contained in the base chamber 10 at a level below the access door 12 should the auxiliary tank 11 begin to leak.
Figs. 8 and 8A illustrate an alternate tank assembly 20 comprising a main tank 18 for storing a first liquid. A
secondary containment tank 5 encloses the main tank 18 such that liquid leaking from the main tank 18 is contained in a containment chamber 8 between the main tank 18 and the Zo secondary containment tank 5. A hollow base 9 supports the tank assembly 20. The hollow base 9 is attached to the secondary containment tank 5 to form a base chamber 10. An - F&K 599-05-O1 auxiliary tank lla for storage of a second liquid is fixed to the tank assembly 20 inside the base chamber 10. Auxiliary tank lla is not protected by secondary containment, as base chamber sidewall 10s, and base chamber floor 10f form a portion of the auxiliary tank 11a. The auxiliary tank lla is economical and could be safely used with non-hazardous liquids such as methanol. Optionally the separate contained auxiliary tank of Figs. 7 and 7A is available for hazardous liquids.
Overflow, insulation and heat could be provided for the 1o alternate tank assembly 20 as described above, and the configuration could also be any convenient shape as described above.
The foregoing is considered as illustrative only of the is principles of the invention. Further, since numerous changes and modifications will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all such suitable changes or modifications in 2o structure or operation which may be resorted to are intended to fall within the scope of the claimed invention.
s The invention is in the field of liquid storage containers and in particular such liquid storage containers which provide secondary containment of the stored liquid.
to Liquid storage containers, or tanks, are commonly used to store liquid for many industrial and commercial purposes.
Where hazardous or potentially damaging liquids are stored, the tank assembly must include provision for secondary ~s containment of the liquid. It is desirable as well to containing overflow from the tank.
Conventionally the secondary containment and overflow provision are provided by a double walled tank, essentially a 2o tank within a tank. In conventional tank assemblies, any overflow liquid from overfilling the primary tank is directed into the secondary containment tank such that essentially the F&K 599-05-O1 overflow tank and the secondary containment tank are the same tank. Thus in the conventional tank assemblies there is no secondary containment provision for the contents of the overflow tank. Should the primary tank begin to leak, any leaking liquid will be caught by the secondary containment tank. For liquid to escape into the environment from the primary tank two leaks must occur, one in the primary tank, and a second leak in the secondary containment tank.
1o Liquid from any overflow tank, however, can escape into the environment where only one leak occurs, that being in the secondary containment tank.
It is also common at certain sites to require two tanks for two separate liquids, such as at a petroleum well site, during the winter, where a water storage tank is required as well as a methanol tank to supply methanol which is circulated in the lines to prevent freezing. Diesel fuel is commonly kept in an auxiliary tank as well. Conventionally the auxiliary tank 2o is separate from the primary tank assembly. Transport of the second auxiliary tank is problematic as it must be handled and transported separately from the primary tank assembly. The auxiliary tank is also not protected by any secondary - F&K 599-05-O1 containment system.
Insulated tank assemblies are often required for various applications in extreme conditions.
SUi~iARY OF THE INVENTION
It is an object of the present invention to provide a tank assembly with an overflow tank that is contained such that io liquids leaking from the overflow tank do not escape into the environment.
It is a further object of the present invention to provide a tank assembly which includes storage tanks for two separate liquids for easy transport, and where both tanks may be protected by secondary containment such that liquid leaking from either tank does not escape into the environment.
The present invention provides a liquid storage tank assembly 2o comprising a primary tank for storing a liquid; an overflow tank operatively connected to the primary tank such that when the liquid in the primary tank rises to a full capacity level - F&K 599-05-O1 of the primary tank, excess liquid flows into the overflow tank; and a secondary containment tank enclosing the primary tank and the overflow tank such that liquid leaking from the primary tank or the overflow tank is contained in the secondary containment tank.
The tank assembly may be configured in any convenient shape, and may be provided with a contained, attached auxiliary tank, and with insulation and heat if required.
In a second aspect the invention provides a liquid storage tank assembly comprising a primary tank for storing a first liquid; a secondary containment tank enclosing the primary tank such that liquid leaking from the primary tank is i5 contained in a containment chamber between the inner tank and the secondary containment tank; a hollow base for supporting the tank assembly, the hollow base attached to the secondary containment tank to form a base chamber; and an auxiliary tank for storage of a second liquid, the auxiliary tank fixed to 2o the assembly inside the base chamber. Where methanol is stored in the auxiliary tank, containment is not critical, and the auxiliary tank may share a wall with the base. Where diesel or other hazardous products are stored in the auxiliary F&K 599-05-O1 tank it may be a totally separate tank fixed inside the base chamber such that liquid leaking from the auxiliary tank may be contained in the base chamber.
DESCRIPTION OF THE DRAWINGS:
While the invention is claimed in the concluding portions hereof, preferred embodiments are provided in the accompanying detailed description which may be best understood in 1o conjunction with the accompanying diagrams where like parts in each of the several diagrams are labeled with like numbers, and where:
Fig. 1 is perspective view of an insulated tank assembly 1s embodying the invention;
Fig. 2 is a schematic side view showing the operation of the tank assembly of Fig. 1.
2o Fig. 3 is a schematic end view showing the operation of the tank assembly of Fig. 1.
F&K 599-05-O1 Figs . 4 and 4A are schematic top and side views of an alternate vertical cylindrical embodiment;
Figs. 5 and 5A are schematic top and side views of an alternate rectangular embodiment;
Figs. 6 and 6A are schematic end and side views illustrating the location of the insulation in the tank assembly of Fig. 1.
Figs. 7 and 7A are schematic end and side views illustrating an un-insulated tank assembly.
Figs. 8 and 8A are schematic end and side views illustrating an alternate tank assembly with no overflow tank, and showing an economical auxiliary tank that is not secondarily contained.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS:
Fig. 1 illustrates a liquid storage tank assembly 1 of the invention comprising a primary tank 2 for storing a liquid L;
F&K 599-05-O1 an overflow tank 3 operatively connected to the primary tank 2 by an overflow port 4 such that when liquid L in the primary tank 2 rises to a full capacity level F, excess liquid L flows through the overflow port 4 and into the overflow tank 3.
Figs. 2 and 3 schematically illustrate the operation of the tank assembly 1.
Typically secondary containment tanks are built around the primary tank, with little or no actual gap between the two 1o tanks, or "skin on skin". The gap is exaggerated in the illustrations herein for ease of demonstration.
A secondary containment tank 5 encloses the primary tank 2 and the overflow tank 3 such that liquid L leaking from the primary tank 2 or the overflow tank 3 is contained in the secondary containment tank 5.
Conversely as well, should the primary tank 2 rupture such that liquid L is leaking from the primary tank 2 into the 2o secondary containment tank 5, during filling the liquid level could rise in both the primary and secondary containment tanks 2, 5 at the same time. When the liquid level in the primary - F&K 599-05-O1 and secondary containment tanks 2, 5 rises to a level approaching a full capacity level F of the secondary containment tank 5, excess liquid L flows through the overflow port 4 into the overflow tank 3.
The overflow tank 3 thereby acts as an overflow for both the primary and secondary containment tanks 2, 5 and the secondary containment tank 5 acts as containment for both the primary and overflow tanks 2, 3.
The primary and overflow tanks 2, 3 are formed by dividing an inner tank 6 with a substantially vertical partition wall 7 into a first portion, being the primary tank 2, and a second portion, being the overflow tank 3. The partition wall 7 defines the overflow port 4 in an upper portion thereof at a level corresponding to the full capacity level F of the primary tank 2.
The inner tank 6 is smaller than the secondary containment ao tank 5, and is mounted inside the secondary containment tank 5 such that a containment chamber 8 is formed between the tanks 5, 6 to contain liquid L leaking from a rupture in the F&K 599-05-O1 primary tank 2 or overflow tank 3.
For convenience and economy of manufacture, the inner tank 6 and secondary containment tank 5 can be cylindrical and mounted substantially concentrically in a substantially horizontal orientation, as illustrated in Figs. 7 and 7A.
Alternatively the tank assembly 1 could comprise vertically oriented cylindrical inner and secondary containment tanks 5, io 6 as illustrated in Figs. 4 and 4A, or rectangular tanks as illustrated in Figs. 5 and 5A. Many convenient shapes for particular purposes could be employed to embody the invention, and all such variations in shape are intended to fall within the scope of the present invention.
is The tank assembly 1 further comprises a hollow base 9 for supporting the tank assembly 1. The hollow base 9 is attached to the secondary containment tank 5 to form a base chamber 10, having a base chamber floor 10f, two opposite substantially 2o vertical base chamber end walls 10e, two opposite substantially vertical base chamber side walls 10s, and a base chamber ceiling 10c. The base chamber ceiling comprises an F&K 599-05-O1 outer surface of the secondary containment tank 5.
In the illustrated embodiment of Fig. 1, as seen in Figs. 6 and 6A, the tank assembly is insulated so as to thermally isolate the primary tank 2 and base chamber 10 from an ambient temperature, and further comprises a heater mounted 13 inside the base chamber 10 and operative to heat the base chamber and a bottom portion 5b of the secondary containment tank 5.
io To allow effective heating of the liquid in the primary tank 2, the secondary containment tank 5 comprises a lower portion 5b below a mid-point M positioned immediately adjacent the primary tank 2 in the conventional "skin on skin" orientation.
is This allows heat to pass relatively easily from the base chamber 10 to the primary tank 2. To provide for insulation of the primary tank 2, being the inner tank 6, an upper portion of the secondary containment tank 5a above the mid-point M is positioned to form a first insulation chamber 30a 2o between the inner and outer tanks 6, 5. The secondary containment tank 5 is also positioned such that second and third cylindrical insulation chambers 30b, 30c are formed F&K 599-05-O1 between the inner tank 6 and secondary containment tank 5 at opposite ends of said tank assembly 1.
The insulation chambers may be insulated with particulate, foam, fibreglass batt, or other conventional insulation 14.
If the primary or overflow tanks 2, 3 leak into the secondary containment tank 5, the insulation 14 may come into contact with the leaked liquid. Insulation that is not subject to damage may be used, or same may then require replacement.
io The base chamber side walls lOs extend upwards from the base chamber floor lOf to the mid-point M, approximately one half way up the secondary containment tank 5 along each side thereof. A layer of insulation 17 is also sprayed or otherwise applied to an inner surface of the base chamber end walls 10e and side walls 10s. The floor lOf is generally left un-insulated but could easily be insulated if desired. There is no insulation between the base chamber 10 and the secondary containment tank 5, allowing heat from the base chamber 10 to 2o heat the secondary containment tank 5.
The illustrated embodiment provides an insulated tank where F&K 599-05-O1 all the insulation is protected from damage by contact with equipment and so forth by being inside the outer surface of the tank assembly 1.
The tank assembly 1 further comprises an auxiliary tank 11 for storage of a second liquid. The auxiliary tank is fixed to the assembly 1 inside the base chamber 10 such that liquid leaking from the auxiliary tank 11 is contained in the base chamber 10. An access door 12 into the base chamber 10 is io mounted above the base chamber floor lOf such that all liquid stored in the auxiliary tank 11 can be contained in the base chamber 10 at a level below the access door 12 should the auxiliary tank 11 begin to leak.
Figs. 8 and 8A illustrate an alternate tank assembly 20 comprising a main tank 18 for storing a first liquid. A
secondary containment tank 5 encloses the main tank 18 such that liquid leaking from the main tank 18 is contained in a containment chamber 8 between the main tank 18 and the Zo secondary containment tank 5. A hollow base 9 supports the tank assembly 20. The hollow base 9 is attached to the secondary containment tank 5 to form a base chamber 10. An - F&K 599-05-O1 auxiliary tank lla for storage of a second liquid is fixed to the tank assembly 20 inside the base chamber 10. Auxiliary tank lla is not protected by secondary containment, as base chamber sidewall 10s, and base chamber floor 10f form a portion of the auxiliary tank 11a. The auxiliary tank lla is economical and could be safely used with non-hazardous liquids such as methanol. Optionally the separate contained auxiliary tank of Figs. 7 and 7A is available for hazardous liquids.
Overflow, insulation and heat could be provided for the 1o alternate tank assembly 20 as described above, and the configuration could also be any convenient shape as described above.
The foregoing is considered as illustrative only of the is principles of the invention. Further, since numerous changes and modifications will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all such suitable changes or modifications in 2o structure or operation which may be resorted to are intended to fall within the scope of the claimed invention.
Claims (27)
1. A liquid storage tank assembly comprising:
a primary tank for storing a liquid;
an overflow tank operatively connected to said primary tank such that when said liquid in said primary tank rises to a full capacity level of said primary tank, excess liquid flows into said overflow tank;
a secondary containment tank enclosing said primary tank and said overflow tank such that liquid leaking from said primary tank or said overflow tank, and liquid flowing from said primary tank into said overflow tank, is contained in said secondary containment tank, and such that when liquid leaking from said primary tank into said secondary containment tank causes a liquid level in said secondary containment tank to rise to a level approaching a full capacity level of said secondary containment tank, excess liquid flows into said overflow tank.
a primary tank for storing a liquid;
an overflow tank operatively connected to said primary tank such that when said liquid in said primary tank rises to a full capacity level of said primary tank, excess liquid flows into said overflow tank;
a secondary containment tank enclosing said primary tank and said overflow tank such that liquid leaking from said primary tank or said overflow tank, and liquid flowing from said primary tank into said overflow tank, is contained in said secondary containment tank, and such that when liquid leaking from said primary tank into said secondary containment tank causes a liquid level in said secondary containment tank to rise to a level approaching a full capacity level of said secondary containment tank, excess liquid flows into said overflow tank.
2. The assembly of Claim 1 comprising an inner tank divided by a substantially vertical partition wall into a first portion, being said primary tank, and a second portion, being said overflow tank.
3. The assembly of Claim 2 wherein said partition wall defines an overflow port in an upper portion thereof at a level corresponding to said full capacity level of said primary tank, said overflow port providing a passage for liquid to flow from said primary tank into said overflow tank.
4. The assembly of Claim 3 wherein said inner tank is smaller than said secondary containment tank, and mounted inside said secondary containment tank such that a containment chamber is formed between said tanks to contain liquid leaking from a rupture in said primary tank or said overflow tank.
5. The assembly of Claim 4 wherein said inner tank and secondary containment tank are cylindrical and mounted substantially concentrically in a substantially horizontal orientation.
6. The assembly of any one of Claims 1 - 5 further comprising a hollow base for supporting said tank assembly, said hollow base attached to said secondary containment tank to form a base chamber, having a base chamber floor and base chamber walls.
7. The assembly of Claim 6 further comprising an auxiliary tank for storage of a second liquid, said auxiliary tank fixed to said assembly inside said base chamber.
8. The assembly of Claim 7 wherein a base chamber wall forms a portion of said auxiliary tank.
9. The assembly of Claim 7 said auxiliary tank is separate from said base chamber such that liquid leaking from said auxiliary tank is contained in said base chamber.
10. The assembly of Claim 9 further comprising an access door into said base chamber, said access door mounted above said base chamber floor such that all liquid stored in said auxiliary tank can be contained in said base chamber at a level below said access door.
11. The assembly of Claim 7 wherein said tank assembly is insulated so as to thermally isolate said primary tank and said base chamber from an ambient temperature, and further comprising a heater mounted inside said base chamber and operative to heat said base chamber and a bottom portion of said secondary containment tank.
12. The assembly of Claim 4 wherein said inner tank is cylindrical and mounted in a substantially horizontal orientation, and wherein said secondary containment tank comprises a lower portion below a mid-point positioned immediately adjacent said inner tank and an upper portion above said mid-point positioned to form a first insulation chamber between said inner and outer tanks, and wherein said secondary containment tank is positioned such that a second cylindrical insulation chamber and a third cylindrical insulation chamber are formed between said inner tank and said secondary containment tank at opposite ends of said tank assembly.
13. The assembly of Claim 12 further comprising a hollow base, said hollow base attached to said tank assembly to form a base chamber having a base chamber floor, two opposite substantially vertical base chamber end walls, two opposite substantially vertical base chamber side walls, and a base chamber ceiling, said base chamber ceiling comprising an outer surface of said lower portion of said secondary containment tank.
14. The assembly of Claim 13 further comprising an auxiliary tank for storage of a second liquid, said auxiliary tank fixed to said assembly inside said base chamber such that liquid leaking from said auxiliary tank is contained in said base chamber.
15. The assembly of Claim 14 wherein said base chamber side walls extend upwards from said base chamber floor to said mid-point of said secondary containment tank along each side of said secondary containment tank.
16. The assembly of Claim 15 wherein said first, second and third insulation chambers are at least partially filled with insulation, and further comprising a layer of insulation covering an inner surface of said base chamber end walls and side walls.
17. The assembly of Claim 17 further comprising a heater mounted inside said base chamber and operative to heat said base chamber.
18. A liquid storage tank assembly comprising:
a cylindrical inner tank, oriented substantially horizontally, divided by a substantially vertical partition wall into a primary tank for storing a liquid, and an overflow tank.;
an overflow port defined by said partition wall in an upper portion thereof at a level corresponding to a full capacity level of said primary tank, said overflow port providing a passage for liquid to flow from said primary tank into said overflow tank;
a cylindrical secondary containment tank mounted substantially concentrically with said inner tank and enclosing said inner tank.
a cylindrical inner tank, oriented substantially horizontally, divided by a substantially vertical partition wall into a primary tank for storing a liquid, and an overflow tank.;
an overflow port defined by said partition wall in an upper portion thereof at a level corresponding to a full capacity level of said primary tank, said overflow port providing a passage for liquid to flow from said primary tank into said overflow tank;
a cylindrical secondary containment tank mounted substantially concentrically with said inner tank and enclosing said inner tank.
19. The assembly of Claim 19 further comprising a hollow base for supporting said tank assembly, said hollow base attached to said secondary containment tank to form a base chamber, having a base chamber floor and base chamber walls.
20. The assembly of Claim 20 further comprising an auxiliary tank for storage of a second liquid, said auxiliary tank fixed to said assembly inside said base chamber.
21. The assembly of Claim 21 wherein a base chamber wall forms a portion of said auxiliary tank.
22. The assembly of Claim 21 said auxiliary tank is separate from said base chamber such that liquid leaking from said auxiliary tank is contained in said base chamber.
23. The assembly of Claim 23 further comprising an access door into said base chamber, said access door mounted above said base chamber floor such that all liquid stored in said auxiliary tank can be contained in said base chamber at a level below said access door.
24. A liquid storage tank assembly comprising:
a primary tank for storing a first liquid;
a secondary containment tank enclosing said primary tank such that liquid leaking from said primary tank is contained in a containment chamber between said primary tank and said secondary containment tank;
a hollow base for supporting said tank assembly, said hollow base attached to said secondary containment tank to form a base chamber having a base chamber floor and base chamber walls;
an auxiliary tank for storage of a second liquid, said auxiliary tank fixed to said assembly inside said base chamber.
a primary tank for storing a first liquid;
a secondary containment tank enclosing said primary tank such that liquid leaking from said primary tank is contained in a containment chamber between said primary tank and said secondary containment tank;
a hollow base for supporting said tank assembly, said hollow base attached to said secondary containment tank to form a base chamber having a base chamber floor and base chamber walls;
an auxiliary tank for storage of a second liquid, said auxiliary tank fixed to said assembly inside said base chamber.
25. The assembly of Claim 25 wherein a base chamber wall forms a portion of said auxiliary tank.
26. The assembly of Claim 25 said auxiliary tank is separate from said base chamber such that liquid leaking from said auxiliary tank is contained in said base chamber.
27. The assembly of Claim 27 further comprising an access door into said base chamber, said access door mounted above said base chamber floor such that all liquid stored in said auxiliary tank can be contained in said base chamber at a level below said access door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2309237 CA2309237C (en) | 2000-05-24 | 2000-05-24 | Tank with containment and overflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2309237 CA2309237C (en) | 2000-05-24 | 2000-05-24 | Tank with containment and overflow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2309237A1 CA2309237A1 (en) | 2001-11-24 |
| CA2309237C true CA2309237C (en) | 2006-02-14 |
Family
ID=4166226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2309237 Expired - Fee Related CA2309237C (en) | 2000-05-24 | 2000-05-24 | Tank with containment and overflow |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2309237C (en) |
-
2000
- 2000-05-24 CA CA 2309237 patent/CA2309237C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2309237A1 (en) | 2001-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |