Cold insulation device for offshore production facility
By using a combined structure of grille, self-leveling layer and foam glass in offshore production facilities, the problem that insulation materials cannot isolate low-temperature media in low-temperature environments is solved, and the protection of steel structures and normal operation is achieved, and the construction is simple.
Patent Information
- Application Number
- CN202422394416.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The insulation materials in existing offshore production facilities cannot adapt to low temperature environments below -100℃, and conventional insulation materials have a large thermal conductivity coefficient, which cannot effectively isolate low temperatures and cannot withstand daily loads on the deck.
The combined structure of grille, self-leveling layer, foam glass and dry sand is adopted. By setting dry sand, foam glass and self-leveling layer in turn, the low-temperature medium is avoided from contacting the steel plate directly. The low thermal conductivity and low density characteristics of foam glass are used to achieve timely discharge of cold media in combination with cold media collection and discharge pipelines.
Effectively isolate the damage of low-temperature media to the steel plate, maintain the strength of the steel structure, allow daily operation and maintenance, and do not affect emergency escape channels. It is easy to construct, and cold media and rainwater can be discharged in time to avoid damage to foam glass.
Smart Images
Figure CN223241007U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of marine petroleum engineering, in particular to a cold insulation device for offshore production facilities. Background Art
[0002] Offshore production facilities are primarily steel structures, and steel's strength is sensitive to low temperatures. When the temperature drops below -30°C, the strength of the steel decreases significantly. For offshore production facilities that produce and store cryogenic media such as liquefied natural gas, liquefied petroleum gas, and high-pressure carbon dioxide, the impact of low temperatures on the integrity of the steel structure after a media leak must be considered.
[0003] Commonly used insulation materials in offshore production facilities are not suitable for cryogenic applications. Firstly, the insulation materials themselves cannot withstand temperatures below -100°C. Secondly, conventional insulation materials have high thermal conductivity, making them incapable of isolating temperatures below -100°C. Thirdly, the insulation materials' strength is insufficient to withstand the daily loads on the deck.
[0004] Therefore, there is an urgent need to design a cold insulation device for offshore production facilities to solve the above-mentioned problem of cold insulation of production facilities. Utility Model Content
[0005] In order to solve the technical problems mentioned in the background technology that the insulation material itself cannot adapt to the temperature environment below -100℃, the conventional insulation material has a large thermal conductivity coefficient and cannot isolate the low temperature below -100℃, and the strength of the insulation material cannot adapt to the daily load on the deck, an offshore production facility insulation device is provided to solve the problem of insulation of production facilities.
[0006] To achieve the above objectives, the specific technical solutions of the offshore production facility cold insulation device of the present invention are as follows:
[0007] A cold insulation device for an offshore production facility comprises a grille and a self-leveling layer. The self-leveling layer is located below the grille, which is fixed to a steel structure by fastening bolts. The self-leveling layer abuts the steel structure, a foam glass area is laid on the self-leveling layer, an asphalt layer is provided on the foam glass area, dry sand is laid on the asphalt layer, and the grille abuts the dry sand to ensure a stable setting of the grille. A cold medium collection and discharge pipe is connected to the grille, and the cold medium collection and discharge pipe discharges leaked cold medium into the sea.
[0008] Furthermore, the foam glass area includes a first foam glass area and a second foam glass area. The first foam glass area and the second foam glass area are both in contact with the self-leveling layer. The first foam glass area is in contact with the grid on a side away from the self-leveling layer.
[0009] Furthermore, the first foam glass region and the second foam glass region are both formed by stacking foam glasses, and the thickness of the first foam glass region is greater than that of the second foam glass region.
[0010] Furthermore, an asphalt layer is laid on the second foam glass area, and one side of the first foam glass area is in contact with the second foam glass area and the asphalt layer.
[0011] Furthermore, dry sand is laid on the asphalt layer, and the dry sand is used for leveling so that the grid is arranged horizontally.
[0012] Furthermore, a cold medium collecting and discharging pipe is arranged below the grid and located on one side of the first foam glass area.
[0013] Furthermore, the cold medium collection and discharge pipe is away from the grille and passes through the first foam glass area, the self-leveling layer and the steel structure in sequence to discharge the cold medium into the sea.
[0014] Furthermore, the density of dry sand is not greater than 1500 kilograms per cubic meter, and the particle diameter is not greater than 0.5 mm.
[0015] Furthermore, the thickness of the asphalt layer does not exceed 5 mm.
[0016] Furthermore, the cold medium discharge point is far away from the underwater structure of the offshore production facility to avoid damaging the underwater structure.
[0017] The offshore production facility cold insulation device of the utility model has the following advantages:
[0018] By sequentially arranging dry sand, foam glass and self-leveling layers, it is possible to prevent the low-temperature medium from directly contacting the steel plate surface and causing damage to the steel plate. The foam glass has a low thermal conductivity, a low density, and a low weight per unit volume, making it suitable for offshore production facilities. This application can withstand a certain upper load, and people can walk on the deck where the cold insulation device is laid, without affecting the daily operation and maintenance of the offshore production facilities, and without affecting the layout of the emergency escape passages of the offshore production facilities; the cold medium collection and discharge pipes can drain the cold medium in a timely manner, and can also drain rainwater in a timely manner, avoiding damage to the foam glass caused by rainwater penetration. The construction process is simple and convenient for construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic structural diagram of a cold insulation device for offshore production facilities according to the present invention;
[0020] Figure 2 This is a schematic diagram of the cold medium collection and discharge pipeline of the cold insulation device of the offshore production facility of the utility model.
[0021] Description of the marks in the figure:
[0022] 1. Grille; 2. Self-leveling layer; 3. Fastening bolts; 4. Steel structure; 5. First foam glass area; 6. Second foam glass area; 7. Asphalt layer; 8. Dry sand; 9. Cold medium collection and discharge pipes. DETAILED DESCRIPTION
[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.
[0024] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.
[0025] Please refer to the attached Figure 1 To the attached Figure 2 The utility model describes a cold insulation device for offshore production facilities.
[0026] like Figure 1 As shown, the offshore production facility cold insulation device in the utility model includes a grille 1 and a self-leveling layer 2. The self-leveling layer 2 is located below the grille 1. The grille 1 is fixed to the steel structure 4 by fastening bolts 3. The self-leveling layer 2 is abutted on the steel structure 4. A foam glass area is laid on the self-leveling layer 2. An asphalt layer 7 is provided on the foam glass area. Dry sand 8 is laid on the asphalt layer 7. The dry sand 8 is abutted with the grille 1 to ensure that the grille 1 is stably set. A cold medium collection and discharge pipe 9 is connected to the grille 1. The cold medium collection and discharge pipe 9 discharges the leaked cold medium into the sea.
[0027] By sequentially arranging dry sand 8, foam glass and self-leveling layer 2, it is possible to prevent the low-temperature medium from directly contacting the steel plate surface and causing damage to the steel plate. The foam glass has a low thermal conductivity, a low density, and a low weight per unit volume, making it suitable for offshore production facilities. This application can withstand a certain upper load, and people can walk on the deck where the cold insulation device is laid, without affecting the daily operation and maintenance work of the offshore production facilities, nor affecting the layout of the emergency escape passages of the offshore production facilities; the cold medium collection and discharge pipe 9 can drain the cold medium in a timely manner, and can also drain rainwater in a timely manner, avoiding damage to the foam glass caused by rainwater infiltration. The construction process is simple and convenient for construction.
[0028] Further, if Figure 1As shown, the foam glass area includes a first foam glass area 5 and a second foam glass area 6. The first foam glass area 5 and the second foam glass area 6 are both in contact with the self-leveling layer 2, and the first foam glass area 5 is in contact with the grid 1 on the side away from the self-leveling layer 2; the first foam glass area 5 and the second foam glass area 6 are both stacked by foam glass, and the thickness of the first foam glass area 5 is greater than that of the second foam glass area 6; an asphalt layer 7 is laid on the second foam glass area 6, and one side of the first foam glass area 5 is in contact with the second foam glass area 6 and the asphalt layer 7.
[0029] In this embodiment, preferably, a self-leveling layer 2 is laid on the surface of the steel structure 4, and the first foam glass area 5 and the second foam glass area 6 are horizontally set through the self-leveling layer 2. The self-leveling layer 2 corrects the flatness of the steel plate surface to reduce the damage to the foam glass caused by the horizontality difference; the first foam glass area 5 and the second foam glass area 6 are both in contact with the self-leveling layer 2 to play a role in cold insulation, and the upper surface of the first foam glass area 5 is in contact with the grille 1, so that the first foam glass area 5 is filled between the grille 1 and the self-leveling layer 2.
[0030] The first foam glass area 5 and the second foam glass area 6 are both formed by stacking foam glass in sequence, and the density of the first foam glass area 5 is greater than the density of the second foam glass area 6, that is, the first foam glass area 5 has a better cold insulation effect than the second foam glass area 6. The thermal conductivity of foam glass is small, and low-temperature insulation is performed to prevent the low-temperature medium from directly contacting the surface of the steel plate and causing damage to the steel plate.
[0031] The thermal conductivity of the foam glass layer is no higher than 0.04W / (m*°C). The thickness of the foam glass layer is determined based on the minimum allowable surface temperature of the steel structure 4. With a foam glass layer thickness of 70mm and a top low temperature of -163°C, the surface temperature of the steel structure 4 can be maintained above 15°C.
[0032] Preferably, the upper surface of the second foam glass area 6 is paved with an asphalt layer 7, and the side surface of the first foam glass area 5 is in contact with the second foam glass area 6 paved with the asphalt layer 7, so as to prevent the leaked cold medium from flowing from the gap between the first foam glass area 5 and the second foam glass area 6 to the surface of the steel structure 4.
[0033] Further, if Figure 1 and Figure 2 As shown, dry sand 8 is laid on the asphalt layer 7, and the dry sand 8 is used for leveling so that the grille 1 is set horizontally; the cold medium collecting and discharging pipe 9 is arranged below the grille 1, on the side of the first foam glass area 5; the cold medium collecting and discharging pipe 9 passes through the first foam glass area 5, the self-leveling layer 2 and the steel structure 4 in sequence at the end away from the grille 1 to realize the discharge of the cold medium into the sea; the cold medium collecting and discharging pipe 9 adopts a stainless steel pipe, and the cold medium flows into the cold medium collecting and discharging pipe 9 by gravity.
[0034] In this embodiment, preferably, dry sand 8 is evenly laid on the asphalt layer 7, and the dry sand 8 makes the upper surface of the asphalt layer 7 flat, thereby ensuring the horizontal setting of the grille 1; the cold medium collection and discharge pipe 9 is fixedly connected to the bottom of the grille 1, and the cold medium collection and discharge pipe 9 passes through the first foam glass area 5, the self-leveling layer 2 and the steel structure 4 in sequence, thereby collecting the cold medium flowing down through the grille 1, preventing it from falling onto the surface of the steel structure 4, and realizing the discharge of the cold medium into the sea.
[0035] Further, if Figure 1 As shown, the density of the dry sand 8 is not greater than 1500 kilograms per cubic meter, and the particle diameter is not greater than 0.5 mm; the thickness of the asphalt layer 7 is not greater than 5 mm; and the cold medium discharge point is far away from the underwater structure of the offshore production facility to avoid damaging the underwater structure.
[0036] In this embodiment, preferably, the dry sand 8 is a load-bearing layer to protect the foam glass from damage from the upper load; the asphalt layer 7 plays an isolating role to prevent the dry sand 8 from flowing into the second foam glass area 6, and the leaked cold medium is collected along the asphalt layer 7 to the cold medium collection and discharge pipeline 9. The cold medium discharge point is far away from the underwater structure of the offshore production facility to avoid damage to the underwater structure.
[0037] Based on the cold insulation device of offshore production facilities, the utility model prevents the low-temperature medium from directly contacting the surface of the steel structure 4 and causing damage to the surface of the steel structure 4 by sequentially arranging dry sand 8, a first foam glass area 5, a second foam glass area 6 and a self-leveling layer 2. The foam glass has a low thermal conductivity, a low density, and a low weight per unit volume of foam glass, and is suitable for offshore production facilities. The application can withstand a certain upper load, and people can walk on the deck where the cold insulation device is laid, without affecting the daily operation and maintenance work of the offshore production facilities, and without affecting the layout of the emergency escape passage of the offshore production facilities; the cold medium collection and discharge pipe 9 can drain the cold medium in time, and can also drain rainwater in time to avoid damage to the foam glass caused by rainwater infiltration. The construction process is simple and convenient for construction.
[0038] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A cold insulation device for offshore production facilities, characterized in that: It includes a grille and a self-leveling layer. The self-leveling layer is located below the grille. The grille is fixed to the steel structure by fastening bolts. The self-leveling layer is abutted on the steel structure. A foam glass area is laid on the self-leveling layer. An asphalt layer is provided on the foam glass area. Dry sand is laid on the asphalt layer. The grille is abutted on the dry sand to ensure that the grille is stably set. A cold medium collection and discharge pipe is connected to the grille. The cold medium collection and discharge pipe discharges the leaked cold medium into the sea.
2. The offshore production facility cold insulation device according to claim 1, characterized in that: The foam glass area includes a first foam glass area and a second foam glass area. The first foam glass area and the second foam glass area both abut against the self-leveling layer. The first foam glass area abuts against the grid at a side away from the self-leveling layer.
3. The offshore production facility cold insulation device according to claim 2, characterized in that: The first foam glass region and the second foam glass region are both formed by stacking foam glass, and the thickness of the first foam glass region is greater than that of the second foam glass region.
4. The offshore production facility cold insulation device according to claim 2, characterized in that: An asphalt layer is laid on the second foam glass area, and one side of the first foam glass area abuts against the second foam glass area and the asphalt layer.
5. The offshore production facility cold insulation device according to claim 4, characterized in that: Dry sand is laid on the asphalt layer and used for leveling so that the grille is set horizontally.
6. The offshore production facility cold insulation device according to claim 1, characterized in that: The cold medium collecting and discharging pipeline is arranged below the grid and is located on one side of the first foam glass area.
7. The offshore production facility cold insulation device according to claim 6, characterized in that: The cold medium collecting and discharging pipe is away from the grille and passes through the first foam glass area, the self-leveling layer and the steel structure in sequence to realize the discharge of the cold medium into the sea.
8. The offshore production facility cold insulation device according to claim 5, characterized in that: The density of dry sand shall not exceed 1500 kg per cubic meter and the particle diameter shall not exceed 0.5 mm.
9. The offshore production facility cold insulation device according to claim 5, characterized in that: The thickness of the asphalt layer shall not exceed 5mm.
10. The offshore production facility cold insulation device according to claim 7, characterized in that: The cold medium discharge point is far away from the underwater structure of the offshore production facility to avoid damaging the underwater structure.