CN110294221B - Anti-leakage floating roof tank and anti-leakage method - Google Patents
Anti-leakage floating roof tank and anti-leakage method Download PDFInfo
- Publication number
- CN110294221B CN110294221B CN201910582630.7A CN201910582630A CN110294221B CN 110294221 B CN110294221 B CN 110294221B CN 201910582630 A CN201910582630 A CN 201910582630A CN 110294221 B CN110294221 B CN 110294221B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 116
- 239000011344 liquid material Substances 0.000 claims abstract description 47
- 230000004888 barrier function Effects 0.000 claims abstract description 42
- 239000012530 fluid Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 230000001502 supplementing effect Effects 0.000 claims description 14
- 238000004146 energy storage Methods 0.000 claims description 13
- 238000004064 recycling Methods 0.000 claims description 5
- 238000013022 venting Methods 0.000 claims 1
- 238000004134 energy conservation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 76
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000002637 fluid replacement therapy Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- B65D88/00—Large containers
- B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
- B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
- B65D88/48—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with fluid means acting on the seal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A leak-proof floating roof tank and a leak-proof method, comprising a tank bottom, a tank wall which is integrally formed on the tank bottom and is used for loading volatile liquid materials, a floating roof which floats on the surface of the volatile liquid materials in the tank wall, a circle of first-stage seal which is formed between the lower periphery of the floating roof and the tank wall, a circle of second-stage seal which is formed between the upper periphery of the floating roof and the tank wall, a circle of annular space which is formed between the first-stage seal and the second-stage seal, and a high-pressure barrier fluid which can ensure that the volatile liquid materials do not leak and evaporate and is filled in the annular space through a circulating filling and discharging liquid/gas mechanism which is arranged outside, wherein the pressure of the high-pressure barrier fluid is larger than the vapor pressure of the volatile liquid materials. The invention can block all paths of any material from escaping to the atmosphere. The invention has the advantages of convenient reconstruction, low cost, emission reduction and energy conservation.
Description
Technical Field
The invention relates to a floating roof tank. In particular to a leakage-proof floating roof tank and a leakage-proof method.
Background
The floating roof tank is a device for storing liquid materials containing volatile gases and comprises an outer floating roof tank and an inner floating roof tank.
As shown in fig. 1, the existing external floating roof tank comprises a tank bottom 1 and a tank wall 2 integrally formed on the tank bottom 1, wherein a floating roof 7 in the tank wall 2 is a floating top cover floating on the surface of a liquid material 5, an annular space is arranged between the floating roof 7 and the tank wall 2 along with the input and output of the liquid material 5, and a circle of first-stage seal 3 and a circle of second-stage seal 4 are respectively arranged below the annular space, so that the liquid material 5 in the tank is isolated from the atmosphere when the floating roof 7 floats up and down, thereby greatly reducing the evaporation loss of the liquid material 5 in the storage process.
As shown in fig. 2, the existing inner floating roof tank is a floating roof tank with a tank top 13, and the tank top 13 capable of covering the upper port of the tank wall 2 is arranged at the upper port of the tank wall 2 of the existing outer floating roof tank. The roof 13 of the inner floating roof tank is of a dome structure, so that the inner floating roof tank forms a structure with a dome outside and a floating roof inside. Compared with the outer floating roof tank, the inner floating roof tank has the fixed tank roof 13, so that invasion of wind, sand, rain and snow or dust can be effectively prevented, and the quality of the liquid material 5 is absolutely ensured. Meanwhile, the floating roof 7 floats on the liquid material 5, so that the liquid material 5 has no steam space, reduces evaporation loss, air pollution and ignition explosion danger, can not cause large-area combustion generally even if a fire disaster occurs, is easy to ensure the quality of liquid storage, and is particularly suitable for storing high-grade gasoline, jet fuel and toxic petrochemical products; and the evaporation loss can be further reduced.
However, neither the outer nor the inner floating roof tank is completely sealed by the first stage seal 3 nor the second stage seal 4, and more or less leakage and evaporation of the liquid material 5 occurs.
Disclosure of Invention
The invention aims to solve the technical problem of providing a leakage-proof floating roof tank and a leakage-proof method, wherein the leakage-proof floating roof tank can ensure that liquid materials in the floating roof tank cannot leak and evaporate.
The technical scheme adopted by the invention is as follows: the utility model provides a leak protection floating roof tank, includes the tank bottom, and an organic whole forms the tank wall that is used for loading and contains volatile liquid material on the tank bottom, is located the floating roof that floats on volatile liquid material surface in the tank wall the lower periphery of floating roof with be formed with round first-stage seal between the tank wall the upper periphery of floating roof with be formed with round second-stage seal between the tank wall, be formed with round annular space between first-stage seal and the second-stage seal, the annular space is interior to be filled with through setting up the circulation filling liquid/gas mechanism that is outside and to be filled with the high pressure barrier fluid that can ensure that volatile liquid material does not leak and evaporate, the pressure of high pressure barrier fluid is greater than the vapor pressure of volatile liquid material.
The circulating filling and discharging liquid/gas mechanism comprises an energy storage tank with a high-pressure barrier fluid as a pressure source, wherein a liquid/gas supplementing port, a liquid/gas outlet and a liquid/gas returning port are respectively arranged on the tank wall of the energy storage tank, the liquid/gas supplementing port is connected with an external liquid/gas supplying device through a liquid/gas supplementing pipe, the liquid/gas outlet penetrates through the liquid/gas outlet pipe and is communicated with the liquid/gas inlet end of the annular space in a sealing manner at the second stage and is used for filling the high-pressure barrier fluid into the annular space, and the liquid/gas returning port penetrates through the liquid/gas outlet end of the annular space in a sealing manner at the second stage and is used for recycling multiple residual liquid/gas.
And a circulating pump or a fan is arranged on the liquid return/air pipe.
The utility model provides a leak protection floating roof tank, includes the tank deck, the integrated tank deck that is used for loading and contains volatile liquid material that forms on the tank deck, is located the floating roof that floats on volatile liquid material surface in the tank deck to and set up the tank deck of port on the tank deck be formed with round first-stage seal between the lower periphery of floating roof with be formed with round second-stage seal between the upper periphery of floating roof with the tank deck, be formed with round annular space between first-stage seal and the second-stage seal, fill through setting up the circulation filling liquid/gas mechanism in outside in the annular space and be filled with the high pressure barrier fluid that can ensure that volatile liquid material does not leak and evaporate, the pressure of high pressure barrier fluid is greater than the vapor pressure of volatile liquid material.
The circulating filling and discharging liquid/gas mechanism comprises an energy storage tank with a high-pressure barrier fluid as a pressure source, wherein a liquid/gas supplementing port, a liquid/gas outlet and a liquid/gas returning port are respectively arranged on the tank wall of the energy storage tank, the liquid/gas supplementing port is connected with an external liquid/gas supplying device through a liquid/gas supplementing pipe, the liquid/gas outlet sequentially penetrates through the tank top and the liquid/gas inlet end of the annular space through a liquid/gas outlet pipe and is communicated with the liquid/gas inlet end of the annular space in a sealing manner at the second stage and is used for filling the high-pressure barrier fluid into the annular space, and the liquid/gas returning port sequentially penetrates through the tank top and the liquid/gas outlet end of the annular space through a liquid/gas returning pipe and is communicated with the liquid/gas outlet end of the annular space in a sealing manner at the second stage and is used for recycling multi-residual liquid/gas.
And a circulating pump or a fan is arranged on the liquid return/air pipe.
A method for preventing leakage of a leakage-proof floating roof tank, comprising the following steps: injecting a high-pressure barrier fluid which is formed by clean liquid or gas and has a pressure higher than the vapor pressure of the volatile liquid material into an annular space formed by the first-stage seal and the second-stage seal, so that the high-pressure barrier fluid fills the annular space and gaps between the inner wall of a tank at the periphery of the annular space and the two-stage seals, and forms a circulating state, and the high-pressure barrier fluid prevents the volatile liquid material in the storage tank from rising the material level of the volatile material due to the rising of the temperature or falling the material level of the volatile material due to the falling of the temperature; or no leakage occurs whether the level of volatile material is raised by feeding or lowered by discharging.
The anti-leakage floating roof tank and the anti-leakage method have the following advantages:
1. whether the liquid level of the volatile material rises due to the rise of the temperature or the liquid level of the volatile material drops due to the fall of the temperature (the phenomenon that the liquid of the volatile material does not have wall hanging) in the storage tank is commonly called 'small breath'; or whether the liquid level of the volatile material rises due to feeding or falls due to discharging (the phenomenon of wall hanging of the material is avoided), is commonly called 'large breath'; no leakage occurs.
2. In case that a very small amount of volatile VOCs gas escapes into the barrier fluid, all the VOCs gas possibly escaping can be 100% collected as long as all the barrier fluid is filtered, so that the collection efficiency is improved.
3. Blocking any way any material escapes to the atmosphere.
4. The transformation is convenient and the cost is low.
5. The emission is reduced and the energy is saved.
Drawings
FIG. 1 is a schematic view of a prior art external floating roof tank;
FIG. 2 is a schematic view of the structure of an internal floating roof tank of the prior art;
FIG. 3 is a schematic view of the structure of the leak-proof outer floating roof tank of the present invention;
fig. 4 is a schematic structural view of the leak-proof inner floating roof tank of the present invention.
In the figure
1. 101, 201: can ends 2, 102, 202: tank wall
3. 103, 203: first stage seal 4, 104, 204: second stage seal
5: volatile liquid material 14: high pressure barrier fluid
106. 206: annular spaces 107, 207: floating roof
108. 208: liquid/gas lines 109, 209: liquid/gas return pipe
1010. 2010: energy storage tanks 1011, 2011: circulation pump or fan
1012. 2012, 2012: fluid replacement/tracheal 2013: tank top
10.1, 20.1: make-up/ports 10.2, 20.2: liquid/gas outlet
10.3, 20.3: liquid/gas return port
Detailed Description
A leak-proof floating roof tank and a leak-proof method of the present invention will be described in detail with reference to the following examples and drawings.
As shown in fig. 3, the leak-proof floating roof tank of the present invention comprises a tank bottom 101, a tank wall 102 integrally formed on the tank bottom 101 and used for loading a liquid material 5 containing volatile gas, a floating roof 107 floating on the surface of the volatile liquid material 5 in the tank wall 102, a first-stage seal 103 formed between the lower periphery of the floating roof 107 and the tank wall 102, and a second-stage seal 104 formed between the upper periphery of the floating roof 107 and the tank wall 102, wherein a ring-shaped space 106 is formed between the first-stage seal 103 and the second-stage seal 104, and a high-pressure barrier 14 capable of ensuring that the volatile liquid material 5 does not leak and evaporate is filled in the ring-shaped space 106 through a circulating filling/discharging mechanism arranged outside, and the pressure of the high-pressure barrier 14 is higher than the vapor pressure of the liquid material 5. So that the volatile liquid material 5 in the tank wall 102 does not leak from the first stage seal 103 into the annular space 106. Meanwhile, a film body which takes the high-pressure barrier fluid 14 as a material component is formed between the first-stage seal 103 and the second-stage seal 104 and the tank wall 102, and the film body can block the escape of volatile materials and prevent the volatile liquid 5 from being hung on the tank wall 102.
The circulating filling and discharging liquid/gas mechanism comprises an energy storage tank 1010 with a high-pressure barrier fluid 14 (clean liquid or gas) as a pressure source, wherein a liquid supplementing/gas port 10.1, a liquid outlet/gas port 10.2 and a liquid return/gas port 10.3 are respectively arranged on the tank wall of the energy storage tank 1010, the liquid supplementing/gas port 10.1 is connected with an external liquid/gas supply device through a liquid supplementing/gas pipe 1012, the liquid outlet/gas port 10.2 penetrates through the second-stage seal 104 through the liquid outlet/gas pipe 108 to be communicated with the liquid inlet/gas port of the annular space 106, the high-pressure barrier fluid 14 is filled into the annular space 106, and the liquid return/gas port 10.3 penetrates through the second-stage seal 104 through the liquid return/gas pipe 109 to be communicated with the liquid outlet/gas port of the annular space 106, and is used for recycling multi-residual liquid/gas. The liquid return/air pipe 109 is provided with a circulation pump or fan 1011.
As shown in fig. 4, a leak-proof floating roof tank according to the present invention comprises a tank bottom 201, a tank wall 202 integrally formed on the tank bottom 201 and used for loading a liquid material 5 containing volatile gas, a floating roof 207 floating on the surface of the volatile liquid material 5 in the tank wall 202, and a tank roof 2013 arranged at an upper port of the tank wall 202, wherein a first-stage seal 203 is formed between the lower periphery of the floating roof 207 and the tank wall 202, a second-stage seal 204 is formed between the upper periphery of the floating roof 207 and the tank wall 202, a ring-shaped space 206 is formed between the first-stage seal 203 and the second-stage seal 204, and a high-pressure barrier 14 capable of ensuring that the volatile liquid material 5 does not leak and evaporate is pressurized in the ring-shaped space 206 by a circulating liquid/gas filling mechanism arranged outside, and the pressure of the high-pressure barrier 14 is greater than the vapor pressure of the volatile liquid material 5. So that the volatile liquid material 5 in the tank wall 202 does not leak from the first stage seal 203 into the annular space 206. At the same time, a film body which takes the high-pressure barrier fluid 14 as a material component is formed between the first-stage seal 203 and the second-stage seal 204 and the tank wall 202, and the film body can block the escape of volatile materials and prevent the volatile liquid 5 from being hung on the tank wall 202.
The circulating filling and discharging liquid/gas mechanism comprises an energy storage tank 2010 with a high-pressure barrier fluid 14 (clean liquid or gas) as a pressure source, wherein a liquid supplementing/gas port 20.1, a liquid outlet/gas port 20.2 and a liquid returning/gas port 20.3 are respectively arranged on the tank wall of the energy storage tank 2010, the liquid supplementing/gas port 20.1 is connected with an external liquid/gas supplying device through a liquid supplementing/gas pipe 2012, the liquid outlet/gas port 20.2 sequentially penetrates through the tank top 2013 and the second-stage seal 204 through the liquid outlet/gas pipe 208 to be communicated with the liquid inlet/gas end of the annular space 206, and is used for filling the high-pressure barrier fluid 14 into the annular space 206, and the liquid returning/gas port 20.3 sequentially penetrates through the tank top 2013 and the second-stage seal 204 through the liquid returning/gas pipe 209 to be communicated with the liquid outlet/gas end of the annular space 206, so as to recover multi-residual liquid/gas. The liquid return/air pipe 209 is provided with a circulating pump or a fan 2011.
The leak-proof floating roof tank is characterized in that clean liquid or gas with vapor pressure higher than that of volatile materials is injected into an annular space formed by a first-stage seal and a second-stage seal, so that the annular space is filled with gaps between the inner wall of the tank forming the annular space and the two-stage seal, a circulating state is formed, the high-pressure clean liquid or gas is used as barrier fluid, once micro leakage occurs, the leakage can be supplemented at any time, the volatile materials in the circulating barrier liquid/gas can be 100% collected for treatment while the normal running state is kept, and the volatile materials are ensured not to pollute the atmosphere.
The invention relates to a leakage prevention method of a leakage prevention floating roof tank, which comprises the following steps: injecting a high-pressure barrier fluid which is formed by clean liquid or gas and has higher pressure than the vapor pressure of the volatile liquid material into an annular space formed by the first-stage seal and the second-stage seal, so that the high-pressure barrier fluid fills gaps between the annular space and the inner wall of a tank at the periphery of the annular space and the two-stage seals, and forms a circulating state, and the high-pressure barrier fluid prevents the volatile liquid material in the storage tank from causing the material level of the volatile material to rise due to the rise of temperature or causing the material level of the volatile material to fall due to the fall of temperature (the material liquid has no wall hanging phenomenon) so as to be commonly called 'small breath'; or whether the material level of the volatile material rises due to feeding or falls due to discharging (the material has no wall hanging phenomenon), is commonly called 'large respiration', the leakage can not occur.
Claims (5)
1. A leak-proof floating roof tank comprising a tank bottom (101), a tank wall (102) integrally formed on the tank bottom (101) and used for loading volatile liquid materials (5), a floating roof (107) which floats on the surface of the volatile liquid materials (5) and is positioned in the tank wall (102), a first-stage seal (103) is formed between the lower periphery of the floating roof (107) and the tank wall (102), a second-stage seal (104) is formed between the upper periphery of the floating roof (107) and the tank wall (102), and a circular space (106) is formed between the first-stage seal (103) and the second-stage seal (104), and the leak-proof floating roof tank is characterized in that a high-pressure barrier (14) capable of ensuring that the volatile liquid materials (5) do not leak and evaporate is filled in the circular space (106) through a circulating pressure-resistant liquid/gas filling mechanism arranged outside, and the pressure of the high-pressure barrier (14) is larger than the vapor pressure of the volatile liquid materials (5);
the circulating filling and discharging liquid/gas mechanism comprises an energy storage tank (1010) with a high-pressure barrier fluid (14) as a pressure source, wherein a liquid supplementing/gas port (10.1), a liquid outlet/gas port (10.2) and a liquid returning/gas port (10.3) are respectively arranged on the tank wall of the energy storage tank (1010), the liquid outlet/gas port (10.2) penetrates through a liquid outlet/gas pipe (108) to be communicated with a liquid inlet/gas end of the annular space (106) through a second-stage seal (104) and is used for filling the annular space (106) with the high-pressure barrier fluid (14), the liquid returning/gas port (10.3) penetrates through the second-stage seal (104) through a liquid outlet/gas pipe (109) to be communicated with a liquid outlet/gas end of the annular space (106) and is used for recycling multi-residual liquid/gas, and a circulating pump or fan (1011) is arranged on the liquid returning/gas pipe (109).
2. A leak-proof floating roof tank according to claim 1, characterized in that the liquid/gas filling port (10.1) is connected to an external liquid/gas supply via a liquid/gas filling pipe (1012).
3. A leak-proof floating roof tank comprising a tank bottom (201), a tank wall (202) integrally formed on the tank bottom (201) and used for loading volatile liquid materials (5), a floating roof (207) floating on the surface of the volatile liquid materials (5) in the tank wall (202), and a tank roof (2013) arranged at an upper port of the tank wall (202), wherein a circle of first-stage seal (203) is formed between the lower periphery of the floating roof (207) and the tank wall (202), a circle of second-stage seal (204) is formed between the upper periphery of the floating roof (207) and the tank wall (202), and a circle of annular space (206) is formed between the first-stage seal (203) and the second-stage seal (204), characterized in that a high-pressure barrier fluid (14) capable of ensuring that the volatile liquid materials (5) do not leak and evaporate is filled in the annular space (206) through a circulating filling/venting mechanism arranged outside, and the pressure of the high-pressure barrier fluid (14) is larger than the volatile liquid materials (5);
the circulating filling and discharging liquid/gas mechanism comprises an energy storage tank (2010) with a high-pressure barrier fluid (14) as a pressure source, wherein a liquid supplementing/gas port (20.1), a liquid outlet/gas port (20.2) and a liquid returning/gas port (20.3) are respectively arranged on the tank wall of the energy storage tank (2010), the liquid outlet/gas port (20.2) sequentially penetrates through a tank top (2013) and a second-stage seal (204) through a liquid outlet/gas pipe (208) to be communicated with a liquid inlet/gas end of the annular space (206) and is used for filling the high-pressure barrier fluid (14) into the annular space (206), the liquid returning/gas port (20.3) sequentially penetrates through the tank top (2013) and the second-stage seal (204) through a liquid returning/gas pipe (209) to be communicated with a liquid outlet/gas end of the annular space (206) and is used for recycling multi-residual liquid/gas, and a circulating pump or fan (2011) is arranged on the liquid returning/gas pipe (209).
4. A leak-proof floating roof tank according to claim 3, characterized in that the liquid/gas make-up port (20.1) is connected to an external liquid/gas supply via a liquid/gas make-up pipe (2012).
5. A method of preventing leakage in a leak-proof floating roof tank as claimed in claim 1 or 3, characterized in that a high pressure barrier fluid of clean liquid or gas having a pressure higher than the vapor pressure of the volatile liquid material is injected into an annular space formed by the first stage seal and the second stage seal, the annular space and a gap between the inner wall of the tank around the annular space and the two stage seals are filled with the high pressure barrier fluid, and a circulation state is formed, and the volatile liquid material in the storage tank is prevented from being raised in level by the high pressure barrier fluid due to a temperature rise or lowered in level by a temperature fall; or no leakage occurs whether the level of volatile material is raised by feeding or lowered by discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910582630.7A CN110294221B (en) | 2019-06-29 | 2019-06-29 | Anti-leakage floating roof tank and anti-leakage method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910582630.7A CN110294221B (en) | 2019-06-29 | 2019-06-29 | Anti-leakage floating roof tank and anti-leakage method |
Publications (2)
| Publication Number | Publication Date |
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| CN110294221A CN110294221A (en) | 2019-10-01 |
| CN110294221B true CN110294221B (en) | 2024-03-12 |
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| CN201910582630.7A Active CN110294221B (en) | 2019-06-29 | 2019-06-29 | Anti-leakage floating roof tank and anti-leakage method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111017427A (en) * | 2019-12-31 | 2020-04-17 | 天津长瑞大通流体控制***有限公司 | Zero-leakage storage tank and zero-leakage method for volatile organic liquid and gas station |
| CN111320215A (en) * | 2019-12-31 | 2020-06-23 | 天津长瑞大通流体控制***有限公司 | Sewage pool without odor dissipation and dissipation prevention method |
| CN111017426A (en) * | 2019-12-31 | 2020-04-17 | 天津长瑞大通流体控制***有限公司 | Zero leak fuel tank/transport canister for a vehicle and zero leak method |
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| US20090266817A1 (en) * | 2008-04-28 | 2009-10-29 | Hilliard Jr Henry T | Method And Apparatus For Abating Fugitive Emissions From A Volatile Liquid Storage Tank |
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| US4258858A (en) * | 1979-07-09 | 1981-03-31 | Russell Robert L | Apparatus for sealing floating roof tanks |
| FR2570682A1 (en) * | 1984-09-27 | 1986-03-28 | Electricite De France | IMPROVEMENT TO FLOATING ROOF TANKS FOR LIQUIDS, IN PARTICULAR STORAGE TANKS USED IN THE ELECTRONUCLEAR FIELD |
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| Publication number | Publication date |
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| CN110294221A (en) | 2019-10-01 |
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