CA2505112A1 - Tank installation with secondary liquid containment - Google Patents
Tank installation with secondary liquid containment Download PDFInfo
- Publication number
- CA2505112A1 CA2505112A1 CA 2505112 CA2505112A CA2505112A1 CA 2505112 A1 CA2505112 A1 CA 2505112A1 CA 2505112 CA2505112 CA 2505112 CA 2505112 A CA2505112 A CA 2505112A CA 2505112 A1 CA2505112 A1 CA 2505112A1
- Authority
- CA
- Canada
- Prior art keywords
- tank
- side wall
- enclosure
- ground level
- containment
- 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.)
- Abandoned
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A tank installation with secondary liquid containment includes a tank and a liquid impervious enclosure having a bottom which underlies the tank and a side wall which surrounds the tank. The side wall of the enclosure is vertically movable from a lowered ground level position to a raised containment position. The side wall is selectively moved to the lowered ground level position when access is required to the tank or when rain water must be drained from the enclosure.
Description
TITLE OF THE INVENTION:
Tank installation with secondary liquid containment FIELD OF THE INVENTION
The present invention relates to a tank installation with secondary liquid containment.
BACKGROUND OF THE INVENTION
The loss of liquid from tanks as a result of leakage, valve failure or rupture is considered an environmental hazard. For that reason, environmental authorities are requiring that secondary containment be placed around tanks in which fuel or chemicals are stored. An unanticipated problem is being experienced with this secondary containment. At certain times of the year the secondary containment is becoming filled with unacceptable levels of rain water, which could adversely affect the capacity of the secondary containment. During these times of years, crews must be sent out to pump the rain water from the secondary containment.
SUMMARY OF THE INVENTION
According to the present invention there is provided a tank installation with secondary liquid containment. The tank installation includes a tank and a liquid impervious enclosure 2 0 having a bottom which underlies the tank and a side wall which surrounds the tank. The side wall of the enclosure is vertically movable from a lowered ground level position to a raised containment position. The side wall is selectively moved to the lowered ground level position when access is required to the tank or when rain water must be drained from the enclosure.
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
Tank installation with secondary liquid containment FIELD OF THE INVENTION
The present invention relates to a tank installation with secondary liquid containment.
BACKGROUND OF THE INVENTION
The loss of liquid from tanks as a result of leakage, valve failure or rupture is considered an environmental hazard. For that reason, environmental authorities are requiring that secondary containment be placed around tanks in which fuel or chemicals are stored. An unanticipated problem is being experienced with this secondary containment. At certain times of the year the secondary containment is becoming filled with unacceptable levels of rain water, which could adversely affect the capacity of the secondary containment. During these times of years, crews must be sent out to pump the rain water from the secondary containment.
SUMMARY OF THE INVENTION
According to the present invention there is provided a tank installation with secondary liquid containment. The tank installation includes a tank and a liquid impervious enclosure 2 0 having a bottom which underlies the tank and a side wall which surrounds the tank. The side wall of the enclosure is vertically movable from a lowered ground level position to a raised containment position. The side wall is selectively moved to the lowered ground level position when access is required to the tank or when rain water must be drained from the enclosure.
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
3 0 FIG. 1 is a side elevation view, in section, of a tank installation constructed in accordance with the teachings of the present invention with the side walls in a partially raised position.
FIG. 2 is a side elevation view, in section, of the enclosure of the tank installation illustrated in FIG.1, with the side walls in the raised position.
FIG. 3 is a side elevation view, in section, of the enclosure of the tank installation illustrated in FIG.1, with the side walls in the lowered ground level position.
FIG. 4 is a top plan view of the enclosure of the tank installation illustrated in FIG.1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a tank installation generally identified by reference numeral 10, will now be described with reference to FIG.1 through 4.
Structure and Relationship of Parts:
Referring now to FIG. 4, there is shown tank installation 10 with secondary liquid containment 12, including a tank 14, and a liquid impervious enclosure 16. It will be understood the term "tank" is intended to include a variety of vessels, which may be associated with other equipment. For example, the "tank" referred to may be a gasoline tank, a coolant tank, or an oil tank that is incorporated into an engine. Although for ease of illustration a stand along tank has been shown, it must be appreciated that there can and will be much more complex installations that also require secondary liquid containment. Similarly, 2 0 liquid impervious enclosure 16 has been illustrated as being rectangular for ease of illustration, liquid impervious enclosure 16 may be in the form of a much more complex structure. Referring to FIG.1, liquid impervious enclosure 16 has a bottom 18 that underlies tank 14 and a side wall 20 that surrounds tank 14. Side wall 20 of enclosure 16 is vertically movable between a lowered ground level position shown in FIG. 3 and a raised containment 2 5 position shown in FIG. 2, such that side wall 20 can be selectively moved to the lowered ground level position when access is required to tank 14 or when rain water must be drained from enclosure 16. As depicted in FIG. 1 through 3, side wall 20 is a collapsible accordion structure 22. Side wall 20 is in a normally lowered ground level position as shown in FIG. 3, and a floatation collar 24 (buoyant ring) is secured to an upper edge 26 of accordion structure 3 0 22, such that side wall 20 is carried to the raised containment position as liquids rise within enclosure 16 as shown in FIG. 2. It will be appreciated that there are a vaxiety of ways of making floatation collar 24 buoyant. Referring again to FIG. 1, pressure members 28 are provided to exert pressure upon floatation collar 24 and force side wall 20 back to the lowered ground level position to release rain water from enclosure 16.
Operation:
The use and operation of tank installation 10 will now be discussed with reference to FIGS. 1 through 4. Referring now to FIG. 1, tank 14 is placed within impervious enclosure 16 as described above. Side walls 20 are normally in the lowered position shown in FIG. 3.
As the liquid level rises due to a leak or otherwise, flotation collar 24 floats on the top, and extends accordion structure 22 such that the liquid is contained within impervious enclosure 16 as shown in FIG.1 and 2. The liquid is then removed according to its composition. If is it contaminated, the liquid is pumped out into a secure container. Referring to FIG. 1, if only rainwater is present, pressure member 28 may be used to push down side wall 20 to drain enclosure 16.
Cautionary Warnings:
The side walls 20 of the enclosure 16 are normally in a lowered ground level position.
As long as liquid flows along the bottom of the enclosure 16, floatation collar 24 will rise and the side walls 20 will contain the liquids. Referring to FIG. 4, containment will fail if a stream of liquid 30 from a ruptured tank or a failed valve 32 is propelled air borne over the 2 0 lowered side walls 20. Care must be taken to determine, in a worst case scenario, how far liquids will "spurt" from the tank. This information is taken into account when positioning the side walls 20 of the enclosure 16. It may be necessary to have a greater distance from a valve to the side wall 20 of the enclosurel6, to guard against air borne liquid propelled under pressure in the event of valve failure.
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that 3 0 there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
FIG. 2 is a side elevation view, in section, of the enclosure of the tank installation illustrated in FIG.1, with the side walls in the raised position.
FIG. 3 is a side elevation view, in section, of the enclosure of the tank installation illustrated in FIG.1, with the side walls in the lowered ground level position.
FIG. 4 is a top plan view of the enclosure of the tank installation illustrated in FIG.1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a tank installation generally identified by reference numeral 10, will now be described with reference to FIG.1 through 4.
Structure and Relationship of Parts:
Referring now to FIG. 4, there is shown tank installation 10 with secondary liquid containment 12, including a tank 14, and a liquid impervious enclosure 16. It will be understood the term "tank" is intended to include a variety of vessels, which may be associated with other equipment. For example, the "tank" referred to may be a gasoline tank, a coolant tank, or an oil tank that is incorporated into an engine. Although for ease of illustration a stand along tank has been shown, it must be appreciated that there can and will be much more complex installations that also require secondary liquid containment. Similarly, 2 0 liquid impervious enclosure 16 has been illustrated as being rectangular for ease of illustration, liquid impervious enclosure 16 may be in the form of a much more complex structure. Referring to FIG.1, liquid impervious enclosure 16 has a bottom 18 that underlies tank 14 and a side wall 20 that surrounds tank 14. Side wall 20 of enclosure 16 is vertically movable between a lowered ground level position shown in FIG. 3 and a raised containment 2 5 position shown in FIG. 2, such that side wall 20 can be selectively moved to the lowered ground level position when access is required to tank 14 or when rain water must be drained from enclosure 16. As depicted in FIG. 1 through 3, side wall 20 is a collapsible accordion structure 22. Side wall 20 is in a normally lowered ground level position as shown in FIG. 3, and a floatation collar 24 (buoyant ring) is secured to an upper edge 26 of accordion structure 3 0 22, such that side wall 20 is carried to the raised containment position as liquids rise within enclosure 16 as shown in FIG. 2. It will be appreciated that there are a vaxiety of ways of making floatation collar 24 buoyant. Referring again to FIG. 1, pressure members 28 are provided to exert pressure upon floatation collar 24 and force side wall 20 back to the lowered ground level position to release rain water from enclosure 16.
Operation:
The use and operation of tank installation 10 will now be discussed with reference to FIGS. 1 through 4. Referring now to FIG. 1, tank 14 is placed within impervious enclosure 16 as described above. Side walls 20 are normally in the lowered position shown in FIG. 3.
As the liquid level rises due to a leak or otherwise, flotation collar 24 floats on the top, and extends accordion structure 22 such that the liquid is contained within impervious enclosure 16 as shown in FIG.1 and 2. The liquid is then removed according to its composition. If is it contaminated, the liquid is pumped out into a secure container. Referring to FIG. 1, if only rainwater is present, pressure member 28 may be used to push down side wall 20 to drain enclosure 16.
Cautionary Warnings:
The side walls 20 of the enclosure 16 are normally in a lowered ground level position.
As long as liquid flows along the bottom of the enclosure 16, floatation collar 24 will rise and the side walls 20 will contain the liquids. Referring to FIG. 4, containment will fail if a stream of liquid 30 from a ruptured tank or a failed valve 32 is propelled air borne over the 2 0 lowered side walls 20. Care must be taken to determine, in a worst case scenario, how far liquids will "spurt" from the tank. This information is taken into account when positioning the side walls 20 of the enclosure 16. It may be necessary to have a greater distance from a valve to the side wall 20 of the enclosurel6, to guard against air borne liquid propelled under pressure in the event of valve failure.
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that 3 0 there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (4)
1. A tank installation with secondary liquid containment, comprising in combination:
a tank;
a liquid impervious enclosure having a bottom which underlies the tank and a side wall which surrounds the tank;
the side wall of the enclosure being vertically movable between a lowered ground level position and a raised containment position, such that the side wall can be selectively moved to the lowered ground level position when access is required to the tank or when rain water must be drained from the enclosure.
a tank;
a liquid impervious enclosure having a bottom which underlies the tank and a side wall which surrounds the tank;
the side wall of the enclosure being vertically movable between a lowered ground level position and a raised containment position, such that the side wall can be selectively moved to the lowered ground level position when access is required to the tank or when rain water must be drained from the enclosure.
2. The tank installation as defined in Claim 1, wherein the side wall is a collapsible accordion structure.
3. The tank installation as defined in Claim 2, wherein the side wall is in a normally lowered ground level position, and a floatation collar is secured to an upper edge of the accordion structure, such that the side wall is carried to the raised containment position as liquids rise within the enclosure.
4. The tank installation as defined in Claim 3, wherein at least one pressure member is provided to exert pressure upon the floatation collar and force the side wall back to the lowered ground level position to release rain water from the enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2505112 CA2505112A1 (en) | 2005-04-21 | 2005-04-21 | Tank installation with secondary liquid containment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2505112 CA2505112A1 (en) | 2005-04-21 | 2005-04-21 | Tank installation with secondary liquid containment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2505112A1 true CA2505112A1 (en) | 2006-10-21 |
Family
ID=37114172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2505112 Abandoned CA2505112A1 (en) | 2005-04-21 | 2005-04-21 | Tank installation with secondary liquid containment |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2505112A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058179A (en) * | 2021-04-07 | 2021-07-02 | 赵明祥 | Fire prevention and fire extinguishing and material recovery system for liquid storage tank |
-
2005
- 2005-04-21 CA CA 2505112 patent/CA2505112A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058179A (en) * | 2021-04-07 | 2021-07-02 | 赵明祥 | Fire prevention and fire extinguishing and material recovery system for liquid storage tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4986436A (en) | Above ground liquid storage system with overfill reservoir | |
| US5390713A (en) | Unitized fuel storage tank | |
| CA2010632A1 (en) | System for underground storage and delivery of liquid product, and recovery of leakage | |
| US4712595A (en) | Magnetic safety funnel | |
| US20110192842A1 (en) | Spill avoidance system and method | |
| US2560586A (en) | Floating roof drain | |
| WO2011097082A1 (en) | Pressure control and relief system | |
| KR20160000477U (en) | Apparatus of air vent oil overflow preventing in and the ship or offshore platform including the same | |
| CA2505112A1 (en) | Tank installation with secondary liquid containment | |
| CA2431923A1 (en) | Vacuum relief unit with means preventing the effects of an accident | |
| US8746482B2 (en) | Storage tank floating roof sump with emergency overflow | |
| SE466146B (en) | TANKERS, SPECIFICALLY BEFORE TRANSPORTING OIL OR OTHER WASHERS LETTERS IN THE WATER | |
| US2846109A (en) | Emergency drain | |
| EP0003591A1 (en) | Venting and anti-pollution device for a shipboard liquid storage tank | |
| US20020152942A1 (en) | Ballast tank arrangement for double-hull tanker | |
| CN108698670A (en) | Automatic sinking device for container and ship body | |
| CA2487572C (en) | Storage tank overflow containment apparatus | |
| KR101386693B1 (en) | Plant for recovering a polluting fluid contained in the tanks of a sunken vessel | |
| US9399571B2 (en) | Overflow valve prevention system | |
| US3606071A (en) | Floating roof drain | |
| GB2206147A (en) | Shell bund for above ground liquid storage tanks | |
| CA2866005C (en) | Pressure relief riser for a production tank | |
| KR101089035B1 (en) | Liquid containing structure | |
| US20170129699A1 (en) | Double-hulled fire resistant above-ground fluid storage tank | |
| EP3186145B1 (en) | Valve for ventilation of a tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |