Cold bridge sealing structure of large low-temperature ethylene storage tank

Abstract

The utility model discloses a cold bridge sealing structure of a large low-temperature ethylene storage tank, which is characterized in that an insulation felt A is hung on the outer side of an inner tank wall plate, an insulation felt B is filled on the outer side above an inner wall reinforcing rib, a glass fiber cloth A is wrapped above the insulation felt B, a glass fiber cloth B is wrapped below the insulation felt B, one end of the glass fiber cloth A is fixed on an inner tank top plate, and the other end of the glass fiber cloth A is fixed on the inner tank top plate. One end of the glass fiber cloth B is fixed to the inner tank top plate, and the other end of the glass fiber cloth B is located between the heat preservation felt B and the inner wall reinforcing ribs. Compared with the prior art, through the sealing design of the cold bridge, heat preservation of the outer side of the inner tank is achieved through the heat preservation felt A, the expansion gap of the cold bridge is sealed through the heat preservation felt B, sealing heat preservation is conducted again through the glass fiber cloth A and the glass fiber cloth B, and meanwhile the glass fiber cloth is folded many times; and a sealing structure with certain flexibility and ductility is formed between the heat preservation felt B and the top surface reinforcing rib.

Description

Technical Field

[0001] The utility model relates to the field of petrochemical industry, in particular to a cold bridge sealing structure for a large-scale low-temperature ethylene storage tank. Background Art

[0002] At present, in the petrochemical field, the diameters and heights of common ethylene storage tanks are small, and their volumes are not large. Conventional designs can meet the design requirements. However, for some large-scale ethylene storage tanks, the inner tank size is φ42X35.8m, the outer tank size is φ44X39m, and the capacity is 46000m 3 , and the working temperature reaches -108°. Due to the large size and heavy total weight of the storage tank, optimal design must be carried out during the structural design to ensure the absolute safe and reliable operation of the equipment.

[0003] Since the working temperature of ethylene can reach as low as -104°, according to the specification, the daily evaporation rate must be lower than 0.06%. Therefore, the design of the cold bridge is crucial. In the conventional design, the thermal insulation material is fixed between the inner wall plate and the inner top plate of the inner tank, and is fixed by bolts after being compacted. Due to the increase in the capacity and volume of the tank body, the cold bridge gap between the wall plate and the top plate becomes larger, and the sealing effect is also significantly reduced, resulting in a higher evaporation rate of low-temperature ethylene. Therefore, it is urgent to design a new cold bridge sealing structure. Content of the Utility Model

[0004] The purpose of the utility model is to provide a cold bridge sealing structure for a large-scale low-temperature ethylene storage tank that solves the above problems.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a cold bridge sealing structure for a large-scale low-temperature ethylene storage tank, including an inner tank top plate, an inner tank wall plate, an inner wall reinforcing rib, and a top surface reinforcing rib. A heat preservation felt A is hung on the outer side of the inner tank wall plate. Heat preservation felt B is filled above the outer side of the inner wall reinforcing rib. The heat preservation felt B is located between the inner tank wall plate and the top surface reinforcing rib. A fiberglass cloth A is wrapped above the heat preservation felt B, and a fiberglass cloth B is wrapped below. One end of the fiberglass cloth A is fixed on the inner tank top plate, and the other end extends from above the heat preservation felt B to the outside of the heat preservation felt A. One end of the fiberglass cloth B is fixed on the inner tank top plate, and the other end is located between the heat preservation felt B and the inner wall reinforcing rib.

[0006] Preferably, a bolt fixing clamping plate is provided at the upper end of the heat preservation felt A, and a hook is provided on the bolt fixing clamping plate. The heat preservation felt A is hung on the top of the inner tank wall plate through the hook on the bolt fixing clamping plate.

[0007] Preferably, there are three layers of the heat preservation felt A, and the three layers of heat preservation felt A are clamped and fixed on the bolt fixing clamping plate by fastening bolts.

[0008] Preferably, a fiberglass cloth C is laid on the top surface of the inner tank top plate.

[0009] Preferably, a pressing plate is provided on the end face of the inner tank top plate, and the fiberglass cloth A, fiberglass cloth B, and fiberglass cloth C are clamped and fixed on the inner tank top plate through the pressing plate.

[0010] Preferably, the connection parts of the fiberglass cloth A, fiberglass cloth B, and fiberglass cloth C are bonded and fixed through a low-temperature adhesive.

[0011] Preferably, the fiberglass cloth A is laid by being bent and folded multiple times between the thermal insulation felt B and the top surface reinforcing rib.

[0012] Preferably, the fiberglass cloth B is laid by being bent and folded multiple times between the thermal insulation felt B and the top surface reinforcing rib.

[0013] Preferably, one end of the fiberglass cloth A away from the inner tank top plate is bonded and fixed to the outside of the thermal insulation felt A.

[0014] Preferably, the inner wall reinforcing rib is welded to the inner tank wall plate, the top surface reinforcing rib is welded to the inner tank top plate, the inner wall reinforcing rib and the top surface reinforcing rib are vertically arranged, and an expansion gap is left between the inner wall reinforcing rib and the top surface reinforcing rib.

[0015] Compared with the prior art, the advantages of the present utility model are as follows:

[0016] (1) Through the sealing design of the cold bridge, the present utility model realizes the thermal insulation on the outside of the inner tank through the thermal insulation felt A. A 245-mm-thick thermal insulation felt B is adopted above the inner tank reinforcing rib to seal the expansion gap of the cold bridge. At the same time, the fiberglass cloth A is used outside the thermal insulation felt B for secondary sealing, and the cold bridge part and the outside of the inner tank wall plate are thermally insulated again. Laying the fiberglass cloth B below the thermal insulation felt B also has a thermal insulation effect.

[0017] (2) Since the fiberglass cloth has good stretchability, the fiberglass cloth A and the fiberglass cloth B are folded multiple times. After the thermal insulation felt B is compacted, a sealing structure with certain stretchability and ductility can be formed between the thermal insulation felt B and the top surface reinforcing rib, which can ensure good sealing even when the cold bridge expands thermally. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0019] In the figure: 1. Inner tank wall plate; 2. Inner tank top plate; 3. Top surface reinforcing rib; 4. Inner wall reinforcing rib; 5. Thermal insulation felt A; 6. Thermal insulation felt B; 7. Bolt fixing clamp; 8. Hook; 9. Fiberglass cloth A; 10. Fiberglass cloth B; 11. Fiberglass cloth C; 12. Pressing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below.

[0021] A cold bridge sealing structure for a large-scale low-temperature ethylene storage tank, see Figure 1 , including an inner tank top plate 2, an inner tank wall plate 1, an inner wall reinforcing rib 4 and a top surface reinforcing rib 3. A heat preservation felt A5 is hung on the outer side of the inner tank wall plate 1. Heat preservation felt B6 is filled above the outer side of the inner wall reinforcing rib 4. The heat preservation felt B6 is located between the inner tank wall plate 1 and the top surface reinforcing rib 3. Above the heat preservation felt B6 is wrapped with fiberglass cloth A9, and below is wrapped with fiberglass cloth B10. One end of the fiberglass cloth A9 is fixed on the inner tank top plate 2, and the other end extends from above the heat preservation felt B6 to the outside of the heat preservation felt A5 and is adhesively fixed on the outside of the heat preservation felt A5. One end of the fiberglass cloth B10 is fixed on the inner tank top plate 2, and the other end is located between the heat preservation felt B6 and the inner wall reinforcing rib 4. Through the sealing design of the cold bridge, the present utility model compresses the top of the three-layer heat preservation felt A5 by a bolt-fixed clamping plate 7, and after compression, it is fixed with bolts and is hung and fixed on the outer side of the inner tank wall plate 1 through a hook 8 to achieve heat preservation on the outer side of the inner tank. A 245-mm-thick heat preservation felt B6 is used above the inner tank reinforcing rib to seal the expansion gap of the cold bridge. At the same time, fiberglass cloth A9 is used outside the heat preservation felt B6 for secondary sealing to conduct secondary heat preservation on the cold bridge part and the outer side of the inner tank wall plate 1. Laying the fiberglass cloth B10 below the heat preservation felt B6 can also play a heat preservation effect.

[0022] The upper end of the heat preservation felt A5 is provided with a bolt-fixed clamping plate 7, and the bolt-fixed clamping plate 7 is provided with a hook 8. The heat preservation felt A5 is hung on the top of the inner tank wall plate 1 through the hook 8 on the bolt-fixed clamping plate 7, and the heat preservation felt A5 can be hung on the outer side of the inner tank wall plate 1 through the bolt-fixed clamping plate 7 and the hook 8.

[0023] There are three layers of the heat preservation felt A5, and the three layers of heat preservation felt A5 have a good heat preservation effect. The three layers of heat preservation felt can be clamped and fixed on the bolt-fixed clamping plate 7 through fastening bolts.

[0024] On the top surface of the inner tank top plate 2 is laid fiberglass cloth C11, and the fiberglass cloth C11 can conduct heat insulation on the top surface of the inner tank top plate 2. On the end surface of the inner tank top plate 2 is provided with a pressing plate 12. The fiberglass cloth A9, fiberglass cloth B10 and fiberglass cloth C11 are clamped and fixed on the inner tank top plate 2 through the pressing plate 12. The pressing plate 12 can compress one end of the fiberglass cloth A9, fiberglass cloth B10 and fiberglass cloth C11 with bolts and fix them on the inner tank top plate 2. The connection parts of the fiberglass cloth A9, fiberglass cloth B10 and fiberglass cloth C11 are adhesively fixed through a low-temperature adhesive. The low-temperature adhesive bonding can bond and fix the fiberglass cloth and conduct filling and sealing. Finally, through the low-temperature adhesive and bolts, the evaporation amount of the low-temperature ethylene can be effectively reduced.

[0025] The glass fiber cloth A9 is laid by bending and folding multiple times between the thermal insulation felt B6 and the top surface reinforcing rib 3. The glass fiber cloth B10 is laid by bending and folding multiple times between the thermal insulation felt B6 and the top surface reinforcing rib 3. Since the glass fiber cloth has good stretchability, after folding the glass fiber cloth A9 and the glass fiber cloth B10 multiple times and compacting the thermal insulation felt B6, a sealing structure with certain stretchability and ductility can be formed between the thermal insulation felt B6 and the top surface reinforcing rib 3, which can ensure good sealing even when the cold bridge expands thermally.

[0026] The inner wall reinforcing rib 4 is welded to the inner tank wall plate 1, the top surface reinforcing rib 3 is welded to the inner tank top plate 2, the inner wall reinforcing rib 4 and the top surface reinforcing rib 3 are vertically arranged, and an expansion gap is left between the inner wall reinforcing rib 4 and the top surface reinforcing rib 3 to cope with the thermal expansion of the tank body through the expansion gap.

[0027] The above has introduced in detail a cold bridge sealing structure and process of a large-scale low-temperature ethylene storage tank provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. It is possible to make changes and improvements to the present utility model without exceeding the concept and scope defined by the appended claims. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A cold bridge sealing structure for a large low-temperature ethylene storage tank, comprising an inner tank top plate, an inner tank wall plate, inner wall reinforcement ribs and top surface reinforcement ribs, characterized in that: A thermal insulation felt A is hung on the outer side of the inner tank wall panel, and a thermal insulation felt B is filled on the outer side above the inner wall reinforcement rib, and the thermal insulation felt B is located between the inner tank wall panel and the top surface reinforcement rib. The thermal insulation felt B is wrapped with glass fiber cloth A on the top and glass fiber cloth B on the bottom. One end of the glass fiber cloth A is fixed to the inner tank top plate, and the other end extends from above the thermal insulation felt B to the outside of the thermal insulation felt A. One end of the glass fiber cloth B is fixed to the inner tank top plate, and the other end is located between the thermal insulation felt B and the inner wall reinforcement rib.

2. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 1 is characterized in that: A bolt fixing clamp is provided at the upper end of the thermal insulation felt A, and a hook is provided on the bolt fixing clamp. The thermal insulation felt A is hung on the top of the inner tank wall plate through the hook on the bolt fixing clamp.

3. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 2 is characterized in that: The thermal insulation felt A has three layers, and the three layers of thermal insulation felt A are clamped and fixed on the bolt fixing clamping plate by fastening bolts.

4. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 1 is characterized in that: The top surface of the inner tank top plate is paved with glass fiber cloth C.

5. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 1 is characterized in that: A pressing plate is provided on the end surface of the inner tank top plate, and the glass fiber cloth A, glass fiber cloth B and glass fiber cloth C are clamped and fixed on the inner tank top plate by the pressing plate.

6. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 5, characterized in that: The connection points of the glass fiber cloth A, the glass fiber cloth B and the glass fiber cloth C are bonded and fixed by a low-temperature adhesive.

7. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 1 is characterized in that: The glass fiber cloth A is bent, folded and laid between the thermal insulation felt B and the top surface reinforcement ribs for multiple times.

8. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 1 is characterized in that: The glass fiber cloth B is bent, folded and laid multiple times between the thermal insulation felt B and the top surface reinforcement ribs.

9. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 1, characterized in that: One end of the glass fiber cloth A away from the inner tank top plate is bonded and fixed to the outer side of the thermal insulation felt A.

10. The cold bridge sealing structure of a large low-temperature ethylene storage tank according to claim 1, characterized in that: The inner wall reinforcement ribs are welded to the inner tank wall plate, the top surface reinforcement ribs are welded to the inner tank top plate, the inner wall reinforcement rib weld and the top surface reinforcement ribs are vertically arranged, and an expansion gap is left between the inner wall reinforcement rib weld and the top surface reinforcement ribs.

Images