Closing method of temporary door of bimetallic full containment tank

Abstract

The present invention provides a method for closing a temporary door of a bimetallic full-containment tank. The method is to first close the hot corner channel of a hot corner protection structure, then stack multiple layers of glass bricks from the hot corner protection structure toward a secondary container, and finally close the secondary temporary door of the secondary container. This method can not only provide construction personnel with a relatively ample operating space, ensure effective operation and project quality, but also first ensure the closure of the hot corner protection structure, and then strengthen the closure of the interlayer and the secondary container on the basis of the closure of the hot corner protection structure. It can effectively ensure the thermal insulation performance of the hot corner protection structure and the secondary container, avoid the phenomenon of cold conduction and frost at the temporary door, and ensure the stability of the overall structure of the bimetallic full-containment tank.

Description

Technical Field

[0001] The invention relates to the technical field of bimetallic full containment tank construction, in particular to a method for closing a temporary construction door of a bimetallic full containment tank. Background Art

[0002] The rapid development of the domestic LNG industry has led to increasing storage capacity at receiving stations, placing increasing demands on the safety performance of storage tanks. Full-containment tanks, a type of tank for above-ground LNG storage, offer higher safety factors and technical and economic benefits compared to single-containment and double-containment tanks.

[0003] Currently, full-containment storage tanks are more complex than single-containment tanks and have stricter construction requirements. Temporary doors, which allow personnel and materials to enter the tank during construction, are typically closed only after the interior is essentially complete. Conventional construction involves first sealing the temporary door, then laying glass bricks at the temporary door, and finally sealing the hot corners to protect the temporary passage.

[0004] This process involves first closing the temporary door of the secondary container and then laying glass bricks at the temporary door. Construction workers are working in a narrow interlayer between the primary and secondary containers, with limited mobility. The construction quality cannot be guaranteed, and quality personnel are unable to monitor the situation well. A variety of uncontrollable factors may cause cold-conducting frost to form at the temporary door after operation, adversely affecting the overall structural stability of the full-container tank. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problem in the prior art that, when constructing a temporary door for a full-containment tank, the temporary door of the secondary container is closed first, and then glass bricks are laid at the temporary door. The construction workers are working in a narrow interlayer between the primary and secondary containers, with limited movement, and the construction quality cannot be guaranteed. The quality personnel are also unable to monitor the work well, and a variety of uncontrollable factors may cause cold conduction and frost to form at the temporary door after operation, which has an adverse effect on the overall structural stability of the full-containment tank.

[0006] To solve the above technical problems, the present invention provides a method for closing a temporary door of a bimetallic full containment tank, wherein the bimetallic full containment tank comprises a main container, a secondary container disposed outside the main container, and a thermal corner protection structure disposed inside the secondary container, wherein the thermal corner protection structure is provided with a thermal corner channel, and the secondary container is provided with a secondary temporary door at a position corresponding to the thermal corner channel;

[0007] The sealing method comprises the following steps:

[0008] closing the hot corner channel of the hot corner protection structure;

[0009] Laying a heat insulation structure between the hot corner channel and the secondary temporary door, the heat insulation structure comprising multiple layers of glass bricks, the multiple layers of glass bricks being stacked and arranged in a direction from the hot corner protection structure toward the secondary container;

[0010] A secondary temporary door is provided for closing the secondary container, and a secondary door panel is provided at the secondary temporary door.

[0011] In one embodiment of the present application, each layer of the glass bricks includes a plurality of brick bodies connected in sequence, and the circumference of the brick bodies is coated with low-temperature glue.

[0012] In one embodiment of the present application, the bricks in two adjacent layers of the glass bricks are staggered in the height direction of the metal full-containment tank, and the bricks in two adjacent layers of the glass bricks are staggered in the width direction of the bricks.

[0013] In one embodiment of the present application, the bricks in two adjacent layers of the glass bricks are staggered by at least 200 mm in the height direction of the metal full-containment tank, and the bricks in two adjacent layers of the glass bricks are staggered by at least 150 mm in the width direction of the bricks.

[0014] In one embodiment of the present application, foaming material and / or low-temperature glue are filled between two adjacent layers of glass bricks.

[0015] In one embodiment of the present application, the secondary door panel is arranged at the secondary temporary door by single-sided welding.

[0016] In one embodiment of the present application, the sealing method further includes: after the secondary door panel is set at the secondary temporary door, leak detection is performed by ultrasonic detection method and / or vacuum box method.

[0017] In one embodiment of the present application, the secondary door panel includes a plurality of strip plates connected in sequence in the height direction of the bimetallic full containment tank, and in the height direction of the bimetallic full containment tank, the width of the lower strip plate is greater than the width of the adjacent upper strip plate.

[0018] In one embodiment of the present application, when closing the secondary temporary door of the secondary container, a fire retardant coating is applied on the glass bricks corresponding to the connection between the secondary door panel and the secondary temporary door.

[0019] In one embodiment of the present application, low-temperature glue is spot-coated between two adjacent layers of glass bricks.

[0020] It can be seen from the above technical solution that the beneficial effects of the present invention are as follows: in the method for closing the temporary door of the bimetallic full-containment tank of the present invention, the hot corner channel of the hot corner protection structure is closed first, and then multiple layers of glass bricks are stacked in the direction of the hot corner protection structure toward the secondary container, and finally the secondary temporary door of the secondary container is closed. This method can not only provide construction personnel with a relatively ample operating space, ensure effective operation and project quality, but also first ensure the closure of the hot corner protection structure, and then strengthen the closure of the interlayer and the secondary container on the basis of the closure of the hot corner protection structure, which can effectively ensure the thermal insulation performance of the hot corner protection structure and the secondary container, avoid the phenomenon of cold conduction and frost at the temporary door, and ensure the stability of the overall structure of the bimetallic full-containment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a flow chart of a method for closing a temporary door of a bimetallic full containment tank.

[0022] Figure 2 It is a schematic diagram of the closed structure of a temporary door for a bimetallic full containment tank.

[0023] Figure 3 It is a schematic diagram of the structure of multi-layer glass bricks in the width direction of the insulation structure.

[0024] Figure 4 It is a schematic diagram of the structure of multi-layer glass bricks in the height direction of the insulation structure.

[0025] Figure 5 This is a schematic diagram of the structure of the strip plate in the door panel.

[0026] The description of the accompanying figures is as follows: 100, bimetallic full containment tank; 10, thermal corner protection structure; 11, thermal corner door panel; 20, secondary container; 21, secondary door panel; 211, strip plate; 30, thermal insulation structure; 31, glass brick; 311, brick body. DETAILED DESCRIPTION

[0027] Typical embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative rather than limiting.

[0028] In the description of this application, it should be understood that in the embodiments illustrated in the accompanying drawings, indications of directions or positional relationships (such as up, down, left, right, front, and back) are provided solely for the purpose of facilitating the description of this application and simplifying the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. These descriptions are appropriate when these components are in the positions shown in the accompanying drawings. If the descriptions of the positions of these components change, these directional indications will also change accordingly.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0030] See Figure 1 and Figure 2 An embodiment of the present application provides a method for sealing a temporary door of a bimetallic full containment tank 100. The method is used to seal the temporary door of the bimetallic full containment tank 100, which can effectively improve the phenomenon that the temporary door is prone to frost after the bimetallic full containment tank 100 is in operation, thereby ensuring the stability of the overall structure of the bimetallic full containment tank 100.

[0031] Before introducing the sealing method, let's first briefly describe the basic structure of the bimetallic full containment tank 100. Specifically, the bimetallic full containment tank 100 includes a main container, a secondary container 20 disposed outside the main container, and a thermal protection structure 10 disposed within the secondary container 20. The main container comprises a main cylinder and a main bottom plate disposed at the bottom of the main cylinder. The secondary container 20 comprises a secondary cylinder, a secondary bottom plate disposed at the bottom of the secondary cylinder, and a dome disposed at the top of the secondary cylinder.

[0032] The main cylinder is vertically mounted. Its main cylinder and main base can be made of austenitic stainless steel or 9% nickel steel, materials that can withstand cryogenic media. The primary container can hold cryogenic liquid and evaporated gas. The secondary container 20 is located outside the main container to ensure the integrity of the overall structure. The secondary container 20 can also be made of austenitic stainless steel, 9% nickel steel, or other metal materials that can withstand cryogenic media.

[0033] The thermal corner protection structure 10 is located inside the secondary container 20 and comprises a thermal corner cylinder and a protective corner base plate located at the bottom of the thermal corner cylinder. The thermal corner protection structure 10 is primarily designed to prevent uncontrolled cracking in the secondary container 20 due to low-temperature shock in the event of a primary container leak. It also protects the bimetallic full containment tank 100 from low-temperature damage, ensuring overall structural stability.

[0034] The hot corner protection structure 10 has a hot corner channel formed on its cylindrical body, and the secondary container 20 has a secondary temporary door formed on its secondary cylindrical body. The secondary temporary door and the hot corner channel are located opposite each other. The temporary door and the hot corner channel facilitate access to the main container during construction.

[0035] In the present application, the temporary door of the bimetallic full containment tank 100 includes a thermal corner channel provided on the thermal corner protection structure 10 and a secondary temporary door provided on the secondary container 20 .

[0036] In this application, the method for closing the temporary door of the bimetallic full containment tank 100 includes the following steps:

[0037] S10, closing the hot corner channel of the hot corner protection structure 10;

[0038] S20, laying a heat insulation structure 30 between the hot corner channel and the secondary temporary door, the heat insulation structure 30 comprising multiple layers of glass bricks 31, the multiple layers of glass bricks 31 being stacked in a direction from the hot corner protection structure 10 toward the secondary container 20;

[0039] S30 , closing the secondary temporary door of the secondary container 20 , and installing a secondary door panel 21 at the secondary temporary door.

[0040] In the existing technical solution, the temporary door of the bimetallic full containment tank 100 is closed by first closing the temporary door of the secondary container 20, then laying glass bricks 31 at the temporary door, and finally closing the temporary passage for thermal corner protection at the thermal corner protection structure 10. This will cause construction workers to work in the narrow interlayer between the thermal corner protection structure 10 and the secondary container 20, which not only restricts their activities but also affects the construction quality, making it easy for cold conduction and frost to form at the temporary door, and the overall stability of the bimetallic full containment tank 100 is poor.

[0041] In the sealing method provided in the present application, the thermal corner channel of the thermal corner protection structure 10 is first sealed, and then multiple layers of glass bricks 31 are stacked in the direction from the thermal corner protection structure 10 toward the secondary container 20, and finally the secondary temporary door of the secondary container 20 is closed. This method can not only provide construction personnel with a relatively ample operating space, ensure effective operation and project quality, but also first ensure the sealing of the thermal corner protection structure 10, and then strengthen the sealing of the interlayer and the secondary container 20 on the basis of the sealing of the thermal corner protection structure 10, which can effectively ensure the thermal insulation performance of the thermal corner protection structure 10 and the secondary container 20, avoid the phenomenon of cold conduction and frost at the temporary door, and ensure the stability of the overall structure of the bimetallic full-containment tank 100.

[0042] In step S10, the hot corner channel of the hot corner protection structure 10 is closed by setting a hot corner door plate 11 at the hot corner channel. Specifically, the hot corner door plate 11 is welded and fixed at the hot corner channel, thereby first closing the hot corner protection channel.

[0043] Combine Figure 3 and Figure 4 In step S20, a heat insulation structure 30 is laid between the hot corner channel and the secondary temporary door. The heat insulation structure 30 includes multiple layers of glass bricks 31. The multiple layers of glass bricks 31 are stacked in a direction from the hot corner protection structure 10 toward the secondary container 20.

[0044] Specifically, multiple layers of glass bricks 31 are stacked in a pattern from the thermal corner protection structure 10 toward the secondary container 20, forming the thermal insulation structure 30. Each layer of glass bricks 31 comprises a plurality of sequentially connected bricks 311, each coated with a low-temperature adhesive. This arrangement ensures superior thermal insulation performance for the thermal insulation structure 30, thereby ensuring the thermal insulation of the inner container 10, preventing frost formation at the temporary door due to cold conduction, and ensuring the overall structural stability of the bimetallic full containment tank 100.

[0045] In one example of this embodiment, three layers of glass bricks 31 can be laid between the hot corner channel and the secondary temporary door. Larger gaps between the first and second layers of glass bricks 31, and between the second and third layers of glass bricks 31, can be filled with a cold-insulating foam. In other examples, smaller gaps between the first and second layers of glass bricks 31, and between the second and third layers of glass bricks 31, can be filled with a low-temperature adhesive.

[0046] This not only improves the tightness of the connection between the multiple layers of glass bricks 31, but also ensures the stability of the overall structure of the thermal insulation structure 30, so that it can exert better thermal insulation performance.

[0047] In addition, the circumference of the glass bricks 31 can be fully coated with low-temperature glue, and the low-temperature glue can be applied between two adjacent layers of glass bricks 31 by spot coating.

[0048] In other examples of this embodiment, the number of layers of glass bricks 31 between the hot corner channel and the secondary temporary door can also be a number, such as two layers, four layers, five layers, etc., which are not limited too much here, and foam material is filled between two adjacent layers of glass bricks 31.

[0049] In the closing method of the present application, step S10 can realize the closing of the hot corner channel of the hot corner protection structure 10, first ensure the overall sealing of the hot corner protection structure 10, and then proceed to step S20, laying the insulation structure 30 between the hot corner channel and the secondary temporary door. The construction personnel have ample operating space, can effectively ensure the quality of the project, and further ensure the thermal insulation effect, thereby avoiding the phenomenon of cold conduction and frost at the temporary door.

[0050] When laying the thermal insulation structure 30, the bricks 311 in two adjacent layers of glass bricks 31 can be arranged in a staggered arrangement along the height of the metal full-containment tank, and the bricks 311 in two adjacent layers of glass bricks 31 can be arranged in a staggered arrangement along the width of the bricks 311. This arrangement not only facilitates construction operations but also ensures the tight connection between the bricks 311, ensuring effective thermal insulation.

[0051] Specifically, during actual construction, the bricks 311 in two adjacent layers of glass bricks 31 can be staggered by at least 200 mm in the height direction of the metal full-containment tank, and the bricks 311 in two adjacent layers of glass bricks 31 can be staggered by at least 150 mm in the width direction of the bricks 311.

[0052] After the installation of the heat insulating structure 30 in step S20 is completed, step S30 is performed to close the secondary temporary door of the secondary container 20 and to install a secondary door panel 21 at the secondary temporary door.

[0053] In step S30, the secondary door panel 21 is attached to the secondary temporary door via single-sided welding. When closing the secondary temporary door of the secondary container 20, a fire-retardant coating is applied to the glass bricks 31 at the junction of the secondary door panel 21 and the secondary temporary door. This prevents welding heat from igniting the foaming material during the closing process, preventing fires and ensuring operational safety.

[0054] like Figure 5 As shown, the secondary door panel 21 comprises a plurality of strips 211 sequentially connected along the height of the bimetallic full containment tank 100. Along the height of the bimetallic full containment tank 100, the width of the lower strip 211 is greater than the width of the adjacent upper strip 211. This arrangement not only facilitates construction operations but also ensures the overall structural stability of the secondary door panel 21, ensuring effective thermal insulation.

[0055] After completing step S30, that is, after setting the secondary door panel 21 at the secondary temporary door, the sealing method of the present application also includes leak detection through ultrasonic detection and / or vacuum box method, so as to test the metal full-containment tank as a whole to check whether the project meets the operating standards.

[0056] The method for closing the temporary door of the bimetallic full-containment tank of the present application is to first close the hot corner channel of the hot corner protection structure, then stack multiple layers of glass bricks from the hot corner protection structure toward the secondary container, and finally close the secondary temporary door of the secondary container. This method can not only provide construction personnel with a relatively ample operating space, ensure effective operation and project quality, but also first ensure the closure of the hot corner protection structure, and then strengthen the closure of the interlayer and the secondary container on the basis of the closure of the hot corner protection structure, which can effectively ensure the thermal insulation performance of the hot corner protection structure and the secondary container, avoid the phenomenon of cold conduction and frost at the temporary door, and ensure the stability of the overall structure of the bimetallic full-containment tank.

[0057] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are intended to be illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. All changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A method for closing a temporary door of a bimetallic full containment tank, the bimetallic full containment tank comprising a main container, a secondary container disposed outside the main container, and a thermal corner protection structure disposed within the secondary container, the thermal corner protection structure having a thermal corner channel formed therein, and the secondary container having a secondary temporary door formed therein at a position corresponding to the thermal corner channel; It is characterized in that The sealing method comprises the following steps: closing the hot corner channel of the hot corner protection structure; Laying a heat insulation structure between the hot corner channel and the secondary temporary door, the heat insulation structure comprising multiple layers of glass bricks, the multiple layers of glass bricks being stacked and arranged in a direction from the hot corner protection structure toward the secondary container; A secondary temporary door is provided for closing the secondary container, and a secondary door panel is provided at the secondary temporary door.

2. The method for closing the temporary door of a bimetallic full containment tank according to claim 1, characterized in that: Each layer of the glass bricks includes a plurality of brick bodies connected in sequence, and the circumference of the brick bodies is coated with low-temperature glue.

3. The method for closing the temporary door of a bimetallic full containment tank according to claim 2, characterized in that: The bricks in two adjacent layers of the glass bricks are arranged in a staggered manner in the height direction of the metal full-containment tank, and the bricks in two adjacent layers of the glass bricks are arranged in a staggered manner in the width direction of the bricks.

4. The method for closing the temporary door of a bimetallic full containment tank according to claim 3, characterized in that: The distance between the bricks in two adjacent layers of the glass bricks in the height direction of the metal full-containment tank is at least 200 mm, and the distance between the bricks in two adjacent layers of the glass bricks in the width direction of the bricks is at least 150 mm.

5. The method for closing the temporary door of a bimetallic full containment tank according to claim 1, characterized in that: The space between two adjacent layers of glass bricks is filled with foaming material and / or low-temperature glue.

6. The method for closing the temporary door of a bimetallic full containment tank according to claim 1, characterized in that: The secondary door panel is arranged at the secondary temporary door by single-sided welding.

7. The method for closing the temporary door of a bimetallic full containment tank according to claim 1, characterized in that: The sealing method further comprises: after the secondary door panel is arranged at the secondary temporary door, leak detection is performed by ultrasonic detection method and / or vacuum box method.

8. The method for closing the temporary door of a bimetallic full containment tank according to claim 1, characterized in that: The secondary door plate includes a plurality of strip plates connected in sequence in the height direction of the bimetallic full containment tank. In the height direction of the bimetallic full containment tank, the width of the lower strip plate is greater than the width of the adjacent upper strip plate.

9. The method for closing the temporary door of a bimetallic full containment tank according to claim 1, characterized in that: When closing the secondary temporary door of the secondary container, fire retardant paint is applied on the glass bricks corresponding to the connection between the secondary door panel and the secondary temporary door.

10. The method for closing the temporary door of a bimetallic full containment tank according to claim 1, characterized in that: Apply low-temperature glue between two adjacent layers of glass bricks.

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