CN109502206A - A kind of oil storage tank margin plate sealant safeguard structure and technique - Google Patents
A kind of oil storage tank margin plate sealant safeguard structure and technique Download PDFInfo
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- CN109502206A CN109502206A CN201811481356.6A CN201811481356A CN109502206A CN 109502206 A CN109502206 A CN 109502206A CN 201811481356 A CN201811481356 A CN 201811481356A CN 109502206 A CN109502206 A CN 109502206A
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- 238000003860 storage Methods 0.000 title claims abstract description 54
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- 230000007704 transition Effects 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000005260 corrosion Methods 0.000 claims abstract description 18
- 239000003292 glue Substances 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims description 111
- 239000000835 fiber Substances 0.000 claims description 28
- 239000004567 concrete Substances 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 24
- 230000007797 corrosion Effects 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 14
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- 230000001680 brushing effect Effects 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 10
- 239000012945 sealing adhesive Substances 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 7
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
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- 229910000838 Al alloy Inorganic materials 0.000 description 2
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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
- B65D90/02—Wall construction
- B65D90/08—Interconnections of wall parts; Sealing means therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses a kind of oil storage tank margin plate sealant safeguard structure and techniques, safeguard structure includes transition zone, the upper end of the transition zone is equipped with elastic sloping layer, and the upper end of the transition zone and elastic sloping layer is successively arranged the first sealant layer, scrim cloth and the second sealant layer for covering the transition zone and elastic sloping layer surface from the bottom to top.The present disclosure provides a kind of oil storage tank margin plate sealant safeguard structure and techniques, by being sealed the processing of glue anti-corrosion leak-proof to the tank bottom of seriously corroded in advance, avoid a large amount of unnecessary investments of the cost of repairs caused by after tank bottom leakage accident occurs and human and material resources, time, it realizes to the efficient safeguard procedures of oil storage tank margin plate, it ensure that oil tank has higher service life, avoid the generation of all kinds of safety accidents.
Description
Technical Field
The invention relates to the technical field of oil storage tank edge plate protection, in particular to an oil storage tank edge plate sealant protection structure and process.
Background
The oil storage tank is the most commonly used oil storage equipment in the petroleum industry of China, according to relevant data statistics, most oil storage tanks adopted by petroleum enterprises of China are metal oil tanks, along with the increase of the service life, the oil storage tanks are corroded, some oil storage tanks even can cause the perforation of the tank body due to the serious corrosion of the tank body, and the conditions such as petroleum leakage cause serious environmental pollution events, and meanwhile, serious consequences are brought to the safety production of the petrochemical enterprises.
The edge plate at the bottom of the oil storage tank is provided with a plurality of materials such as metal base materials, welding seams, building materials and the like, the surface of the base material formed by the materials belongs to a part which is easy to corrode, and according to analysis of relevant investigation information, the corrosion of a bottom plate accounts for 80% in the corrosion of the oil tank; in the corrosion of the bottom plate, the corrosion of the lower surface of the floor accounts for 60 percent; the corrosion of the lower surface of the edge plate was 60%. It can be seen that tank edge panel corrosion is one of the major causes of tank failure. However, most of the existing oil storage tank edge plate protection structures use coatings to separate metal from corrosive media, so as to protect the metal. However, the coating has micropores, so that the coating is easy to crack and peel off after aging, and if the coating is poor in construction quality, pinholes are generated, so that the bare metal forms a small anode, the coating part becomes a large cathode to generate a local corrosion battery, and the paint film is damaged more quickly. Therefore, it is difficult to obtain a satisfactory effect with a single paint protection.
Therefore, the problem that needs to be solved by the technical personnel in the field is to provide the oil storage tank edge plate protection structure and the process which are easy to maintain and have good protection effect.
Disclosure of Invention
In view of the above, the invention provides an oil storage tank edge plate sealant protection structure and process.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a sealant protection structure for an edge plate of an oil storage tank, which is used for protecting the bottom edge of the oil storage tank,
this sealed protective structure that glues of oil storage tank edge board includes the transition layer, the transition layer is located oil storage tank edge board and edge board upper end and extends to the outer fringe position department that oil storage tank wall, edge board lower extreme extended to the vertical direction of base, the upper end on transition layer is equipped with elasticity and looks for the slope layer, elasticity is looked for the slope layer along oil storage tank wall downward sloping to the outer fringe tip of base horizontal direction, the upper end on transition layer and elasticity are looked for the slope layer is by supreme cover that is equipped with in proper order down first sealed glue film, fibre cloth layer and the sealed glue film of second on transition layer and elasticity look for the slope layer surface.
The invention adopts the design of a protective structure comprising a transition layer, an elastic slope-finding layer, a first sealing glue layer, a fiber cloth layer and a second sealing glue layer, and the elastic slope-finding layer and the sealing glue mud are filled between the lower parts of the concrete, the edge plate and the bottom ring plate to seal the lower parts of the concrete, the edge plate and the bottom ring plate to form a complete sealing layer, thereby effectively preventing the invasion of various external media and the material leakage caused by the thinning of the bottom plate or the cracking of a welding seam.
On the basis of the technical scheme, the invention can be improved as follows:
preferably, the transition layer is a primer layer. The primer is coated before the elastic slope layer and the sealing daub are filled, so that the adhesive force between the elastic slope layer and the base material and between the sealing daub and the base material can be improved. In addition, the surface cleaning treatment of the substrate is required before the primer is applied.
Preferably, the thickness range of the primer layer is 9-11 μm, the primer layer cannot be too thin, otherwise, the bonding effect is poor, but the primer layer is too thick, too many chips are easily adhered in the subsequent process, and the bonding effect can be indirectly influenced, and tests show that the primer layer can obtain the best bonding effect within the thickness range of 9-11 μm.
Preferably, the elasticity is looked for the slope layer and is looked for the slope material by the elasticity rubber and constitute, the elasticity rubber is looked for the slope material closely knit and is filled on the oil storage tank bottom edge of being under construction and be the scattered water slope type and pave.
Above-mentioned elastic rubber seeks slope material has not only set up the drainage slope for the oil storage tank bottoms, still makes protective structure further have simultaneously sealed waterproof, tensile buffering, shock attenuation etc. effect.
Preferably, the thickness of the elastic slope-finding layer ranges from 1 cm to 6 cm.
The thickness and the gradient of the elastic slope-finding layer do not need to be large enough to cover the edge plate and ensure that no water is accumulated, so the thickness range is limited to 1-6 cm.
Preferably, the first sealing adhesive layer and the second sealing adhesive layer are concrete anticorrosion sealing adhesive.
The concrete anticorrosion sealant is prepared by taking resin as a base material, is cured into an elastomer at normal temperature, has excellent oil resistance, water resistance, atmospheric aging resistance and corrosion resistance, has good elasticity and strong bonding force, and has good bonding property on materials such as steel, glass, aluminum alloy, concrete, galvanized steel and the like.
Preferably, the thickness of the concrete anticorrosion sealant is 1800-2200 μm.
Preferably, the fiber cloth layer is a high-strength fiber cloth layer.
Through gluing the high-strength fiber cloth layer between the two sealing glue layers, the strength, corrosion resistance, durability and other performances of the whole protection structure can be further improved.
In a second aspect, the invention provides an oil storage tank edge plate sealant protection process, which comprises the following steps:
(1) and dismantling the original anticorrosive coating: knocking out all corroded and loosened cement blocks at the edge of the oil storage tank base;
(2) and derusting and corrosion preventing of the edge plate and the concrete base: the old paint film, rust and cement sundries which are corroded and loosened on the base surface of the edge plate are completely removed, and the anticorrosion treatment is carried out on the old paint film, the rust and the cement sundries which need to be anticorrosion;
(3) repairing damaged concrete base: repairing and leveling all cement bases and performing corner arc transition by using cement mortar;
(4) and brushing a primer for two times: brushing a first primer, well holding the viscosity of the primer to avoid bubbles generated in the coating, brushing a second primer after the first primer is not sticky, wherein the surface drying time of the second primer is 40-60min, and finishing brushing in half an hour during field construction;
(5) and edge sealing lines are pasted on the two sides: two sealing paper layers are pasted at the tank wall position with the upward height of the edge plate of 100mm and the base position with the downward height of the edge plate of 100 mm;
(6) paving an elastic slope-finding layer: paving an elastic slope layer on the plane of the edge plate, and completely modifying the edge of the caulking type oil tank base into a water-dispersing slope type;
(7) the first sealant is coated by scraping, the fiber cloth is pasted, and the second sealant is coated by scraping: and scraping a first sealant on the elastic slope-finding layer, adhering the fiber cloth to the surface of the colloid before the first sealant is not dried, immediately scraping a second sealant on the surface of the fiber cloth, and finishing bubbles to smooth the surface.
The protection process is simple and easy to implement, and the sealant corrosion and seepage prevention treatment is performed on the seriously corroded tank bottom in advance, so that the repair cost, a large amount of unnecessary investment of manpower, material resources and time and the like caused by leakage accidents of the tank bottom plate are avoided, and a series of problems of material loss, environmental pollution, safe production and the like are avoided. The protection process can solve the worries behind the petrochemical enterprises, which is an important measure for changing the after maintenance into the before prevention, is beneficial to safe production and has obvious economic benefit.
According to the technical scheme, compared with the prior art, the invention discloses the oil storage tank edge plate sealant protection structure and the process, which can realize high-efficiency protection measures for the oil storage tank edge plate, so that the oil tank has longer service life, and various safety accidents are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view provided by the present invention;
wherein,
1. transition layer, 2, elasticity layer of looking for the slope, 3, first sealant layer, 4, fibre cloth layer, 5, second sealant layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a sealant protection structure for an edge plate of an oil storage tank, which can efficiently protect the bottom edge of the oil storage tank and achieve the effects of long-acting corrosion resistance, water resistance, high temperature resistance, ageing resistance and the like.
As shown in fig. 1, the oil storage tank edge plate sealant protection structure comprises a transition layer 1, wherein the transition layer 1 is located at the oil storage tank edge plate and the outer edge position where the upper end of the edge plate extends to the wall of the oil storage tank and the lower end of the edge plate extends to the vertical direction of the base. The transition layer 1 is a primer layer and plays a role in improving the adhesion among the elastic slope layer 2, the sealant layer and the substrate, so that the primer layer must be coated on the edge plate of the oil storage tank and the upper and lower positions of the edge plate, if necessary, two layers are coated, and the thickness of the coated primer layer is in the range of 9-11 μm, so as to ensure that the elastic slope layer 2 and the first sealant layer 3 can be strongly adhered to the edge plate of the oil storage tank and the surrounding structure.
The upper end of the transition layer 1 is provided with an elastic slope-finding layer 2 with the thickness range of 1-6cm, and the elastic slope-finding layer 2 is downwards inclined to the outer edge end part of the base in the horizontal direction along the tank wall of the oil storage tank, namely paved in a water-dispersing slope type, so that water drainage is facilitated. The elastic slope-finding layer 2 is made of elastic rubber slope-finding materials which are densely filled on the bottom edge of the constructed oil storage tank, has the functions of sealing, water proofing, tensile buffering and shock absorption, and can simultaneously enable the protective structure to adapt to the deformation of the bottom plate caused by the movement of the oil tank or the change of load.
The upper ends of the transition layer 1 and the elastic slope-finding layer 2 are sequentially provided with a first sealing adhesive layer 3, a fiber cloth layer 4 and a second sealing adhesive layer 5 which cover the surfaces of the transition layer 1 and the elastic slope-finding layer 2 from bottom to top.
The first sealing adhesive layer 3 and the second sealing adhesive layer 5 are concrete anticorrosion sealant, the preferable thickness range is 1800-2200 mu m, the concrete anticorrosion sealant is a special concrete anticorrosion sealant prepared by taking imported resin as a base material, and the sealant is cured into an elastomer at normal temperature and has excellent oil resistance, water resistance, atmospheric aging resistance and corrosion resistance; the adhesive has good elasticity and strong adhesive force, and has good adhesive property to materials such as steel, glass, aluminum alloy, concrete, galvanized steel and the like; meanwhile, the concrete anticorrosion sealant has very high elasticity and toughness, overcomes the defect that a common high polymer is easy to crack under the action of external force due to rigidity after being cured, and has the characteristics of good waterproof effect, good adhesion, excellent mechanical property, easiness in maintenance and long service life.
The fiber cloth layer 4 is a high-strength fiber cloth layer, microcracks can appear on the surface of any glue layer after being blown by wind, dried by sunlight and drenched by rain for a certain time, the high-strength fiber cloth is pasted between the bottom layer and the surface layer sealant, so that the waterproof sealing layer can form a powerful continuous whole, even if defects appear on the surface of the glue layer, the waterproof sealing layer cannot be developed inwards, the invasion of various external media is effectively prevented, and the leakage of materials is caused by the thinning of the bottom plate or the cracking of welding seams.
In order to meet the structural requirements of the edge plate, the protective structure of the invention makes the waterproof coating layer into a certain gradient, adds a certain amount of filler into the waterproof coating to prepare the concrete anticorrosion sealant, and then adopts the construction process of attaching the high-strength fiber cloth layer to strengthen the structural strength, thereby thoroughly cutting off the channels of the edge plate invaded by corrosive media such as rainwater, dew and the like, and achieving the purpose of protecting the oil tank bottom plate.
The embodiment of the invention also discloses an oil storage tank edge plate sealant protection process, which comprises the following steps:
(1) and dismantling the original anticorrosive coating: knocking out all corroded and loosened cement blocks at the edge of the oil storage tank base;
(2) and derusting and corrosion preventing of the edge plate and the concrete base: the old paint film, rust, cement and other impurities which are corroded and loosened on the base surface of the edge plate are completely removed, and the anticorrosion treatment is carried out on the base surface of the edge plate;
(3) repairing damaged concrete base: repairing and leveling all cement bases and performing corner arc transition by using cement mortar;
(4) and brushing a primer for two times: brushing a first primer, well holding the viscosity of the primer to avoid bubbles generated in the coating, brushing a second primer after the first primer is not sticky, wherein the surface drying time of the second primer is 40-60min, and finishing brushing in half an hour during field construction;
(5) and edge sealing lines are pasted on the two sides: two sealing paper layers are pasted at the tank wall position with the upward height of the edge plate of 100mm and the base position with the downward height of the edge plate of 100 mm;
(6) paving an elastic slope-finding layer 2: paving an elastic slope-finding layer 2 on the plane of the edge plate, and completely modifying the edge of the caulking type oil tank base into a water-dispersing slope type;
(7) the first sealant is coated by scraping, the fiber cloth is pasted, and the second sealant is coated by scraping: and scraping a first sealant on the elastic slope-finding layer, adhering the fiber cloth to the surface of the colloid before the first sealant is not dried, immediately scraping a second sealant on the surface of the fiber cloth, and finishing bubbles to smooth the surface.
In the above-mentioned process steps, the long-acting anticorrosion effect can be achieved only by ensuring that the work of each step link completely meets the specification.
The actual operation shows that if the construction of the protective structure of the invention is directly carried out on the original anticorrosive coating, corrosive media hidden in the structure still can cause the phenomenon of rust and perforation, so the original anticorrosive coating must be firstly removed, the edge plate and the concrete base are rust and corrosion removed again, the damaged concrete base is repaired, then the primer coating with sealant can be started, and the elastic sealing rubber is further spread on the upper surfaces of the edge plate and the tank base to form a slope from the tank wall, namely the elastic slope finding layer 2, the thickness and the gradient of the slope finding layer are not required to be large enough to cover the edge plate and ensure no water accumulation, and the caulking treatment is carried out on the contact part of the edge plate concrete and the oil tank in the spreading process of the elastic sealing rubber to ensure long-acting corrosion prevention.
After the elastic slope finding layer 2 is finished, coating a first concrete anticorrosion sealant on the surface of the elastic slope finding layer, filling a gap between the tank bottom and the foundation with a prepared glue material by using a plaster cutter, scraping the glue material on the surface of the foundation, paying attention to the adhesion of the glue material and the surface of the foundation during scraping, and then finishing until the surface is flat and smooth; in order to protect the primer sealing layer, after the first concrete anticorrosion sealant is coated, a layer of high-strength fiber cloth is immediately paved on the surface of the primer sealing layer, the fiber cloth is adhered, the overlapping of the upper seam, the lower seam, the left seam and the right seam of the fiber cloth is required to be at least more than 5cm, and no crease or air hole is required to appear; and finally, coating a surface glue sealing layer, namely the first concrete anticorrosion sealant, trimming until the surface is flat and smooth, so that the fiber cloth has no gap, and is well adhered to the base surfaces of the tank wall and the tank foundation, flat, full and elastic in surface.
If a gap is found at the joint of the fiber cloth and the tank wall later, the concrete anticorrosion sealant should be brushed again in time for remediation.
The invention adopts reasonable protective structure design, and after actual construction, the sealing quality is proved to be excellent through a plurality of tests, water and corrosive media can not permeate into the sealing structure at all, the original leakage point is completely eliminated, and the elasticity and the toughness of the sealing layer are kept as before through a plurality of tests in severe winter.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a sealed protective structure that glues of oil storage tank edge board for bottom edge to the oil storage tank protects, a serial communication port, including the transition layer, the transition layer is located oil storage tank edge board and edge board upper end and extends to the outer fringe position department that oil storage tank wall, edge board lower extreme extended to the vertical direction of base, the upper end of transition layer is equipped with elasticity and looks for the layer of sloping, elasticity looks for the layer of sloping along the outer fringe tip of oil storage tank wall downward sloping to base horizontal direction, the upper end that transition layer and elasticity looked for the layer of sloping is by supreme cover of being equipped with in proper order down the transition layer and elasticity look for the first sealed glue film, fibre cloth layer and the second sealed glue film on layer surface of sloping.
2. The oil storage tank edge plate sealant protective structure according to claim 1, characterized in that: the transition layer is a primer layer.
3. The oil storage tank edge plate sealant protective structure according to claim 2, characterized in that: the thickness of the primer layer ranges from 9 to 11 μm.
4. The oil storage tank edge plate sealant protective structure according to claim 1, characterized in that: the elastic slope finding layer is made of elastic rubber slope finding materials, and the elastic rubber slope finding materials are densely filled on the bottom edge of the constructed oil storage tank.
5. The oil storage tank edge plate sealant protective structure according to claim 1 or 4, characterized in that: the thickness range of the elastic slope-finding layer is 1-6 cm.
6. The oil storage tank edge plate sealant protective structure according to claim 1, characterized in that: the first sealing adhesive layer and the second sealing adhesive layer are concrete anticorrosion sealant.
7. The oil storage tank edge plate sealant protection structure according to claim 6, wherein: the thickness range of the concrete anticorrosion sealant is 1800-2200 mu m.
8. The oil storage tank edge plate sealant protective structure according to claim 1, characterized in that: the fiber cloth layer is a high-strength fiber cloth layer.
9. The oil storage tank edge plate sealant protection process is characterized by comprising the following steps of:
(1) and dismantling the original anticorrosive coating: knocking out all corroded and loosened cement blocks at the edge of the oil storage tank base;
(2) and derusting and corrosion preventing of the edge plate and the concrete base: the old paint film, rust and cement sundries which are corroded and loosened on the base surface of the edge plate are completely removed, and the anticorrosion treatment is carried out on the old paint film, the rust and the cement sundries which need to be anticorrosion;
(3) repairing damaged concrete base: repairing and leveling all cement bases and performing corner arc transition by using cement mortar;
(4) and brushing a primer for two times: brushing a first primer, well holding the viscosity of the primer to avoid bubbles generated in the coating, brushing a second primer after the first primer is not sticky, wherein the surface drying time of the second primer is 40-60min, and finishing brushing in half an hour during field construction;
(5) and edge sealing lines are pasted on the two sides: two sealing paper layers are pasted at the tank wall position with the upward height of the edge plate of 100mm and the base position with the downward height of the edge plate of 100 mm;
(6) paving an elastic slope-finding layer: paving an elastic slope layer on the plane of the edge plate, and completely modifying the edge of the caulking type oil tank base into a water-dispersing slope type;
(7) the first sealant is coated by scraping, the fiber cloth is pasted, and the second sealant is coated by scraping: and scraping a first sealant on the elastic slope-finding layer, adhering the fiber cloth to the surface of the colloid before the first sealant is not dried, immediately scraping a second sealant on the surface of the fiber cloth, and finishing bubbles to smooth the surface.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512659A (en) * | 2019-09-24 | 2019-11-29 | 四川天宜石油化工工程有限公司 | A kind of tank bottom edge seam Seepage technique |
| CN111592855A (en) * | 2020-06-30 | 2020-08-28 | 宁波大大防腐材料技术有限公司 | High-temperature elastic weather-resistant adhesive and preparation method and process thereof |
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