Oil tank with thermal insulation sandwich

Abstract

The utility model discloses an oilfield oil storage tank with heat preservation interlayer belongs to oil storage equipment technical field, and this oil storage tank includes inner jar and sets up the heat preservation mechanism in the inner jar outside, the heat preservation mechanism includes the outer jar, honeycomb strengthening rib and rock wool, and the outer jar coaxial cover is set in the inner jar outside and forms the heat preservation interlayer, and the honeycomb strengthening rib is made of glass fiber reinforced plastics, and it is acrossed between the inner and outer jar to realize fixed connection, and the rock wool is filled in the honeycomb structure inside the honeycomb strengthening rib, and the utility model still can include the heating mechanism of setting up in the inner jar, and its heating coil pipe is layered arrangement along the jar body height direction, and every layer is equipped with independent valve gate. The utility model discloses through adopting the glass fiber reinforced plastics strengthening rib of low thermal conductivity to replace the metal connecting piece, and effectively weakens the thermal bridge effect, realizes the unification of lightweight structure and high -efficient heat preservation, and can be heated accurately according to need in cooperation layered heating design, and saves the energy.

Description

Technical Field

[0001] This utility model relates to the field of oil storage equipment technology, and in particular to an oilfield oil storage tank with an insulation jacket. Background Technology

[0002] Crude oil extracted from oil fields typically contains waxes and gums, and its viscosity increases significantly as the temperature decreases, reducing its fluidity and posing challenges to subsequent gathering, transportation, and processing. To ensure the transport performance of crude oil, insulated storage tanks are usually used at oilfield sites for storage and temperature control.

[0003] Currently, the conventional technical solution for insulating oil storage tanks is to use a double-layer tank structure, that is, to set up an outer tank outside the inner tank for storing crude oil, and to fill the interlayer formed between the inner and outer tanks with insulation materials such as rock wool and polyurethane to reduce the loss of heat from the tank to the outside.

[0004] In the aforementioned double-layer tank structure, to ensure sufficient strength and rigidity of the outer tank and maintain a fixed distance between the inner and outer tanks, steel reinforcing ribs or connectors are typically installed between them. However, since steel is a good conductor of heat, these reinforcing ribs structurally constitute "thermal bridges" penetrating the insulation layer, becoming the main channels for heat loss. This thermal bridging effect significantly weakens the overall insulation performance of the insulation interlayer, leading to increased energy consumption and making it difficult to achieve long-term insulation.

[0005] To mitigate the thermal bridging effect, one approach is to reduce the number or size of reinforcing ribs, but this sacrifices the structural stability of the outer tank. Another approach is to directly increase the thickness of the outer tank wall panels to ensure strength, but this would drastically increase the amount of steel used, making the entire tank exceptionally heavy. This not only increases manufacturing costs but also places higher load-bearing requirements on the foundation for its installation, making it impractical in engineering practice.

[0006] Therefore, this utility model proposes an oilfield storage tank with an insulation jacket to overcome the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides an oilfield storage tank with an insulation jacket, which aims to improve the existing oilfield storage tanks where the metal connectors between the inner and outer tanks are prone to thermal bridging, resulting in poor insulation performance, and where increasing the tank wall thickness to ensure structural strength significantly increases the tank's weight and load.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an oilfield storage tank with an insulation jacket, comprising an inner tank and an insulation mechanism disposed outside the inner tank; the insulation mechanism comprises an outer tank, honeycomb reinforcing ribs, and rock wool.

[0009] The honeycomb reinforcing ribs are made of glass fiber reinforced plastic and span between the outer wall of the inner tank and the inner wall of the outer tank.

[0010] Furthermore, the outer tank is coaxially sleeved on the outside of the inner tank to form an insulation interlayer, the honeycomb reinforcing ribs fix the inner tank and the outer tank together, and the rock wool is filled inside the honeycomb structure of the honeycomb reinforcing ribs.

[0011] Preferably, the outer wall of the outer tank is coated with an epoxy coal tar coating.

[0012] Preferably, the oilfield storage tank with the insulation jacket further includes a heating mechanism disposed inside the inner tank, the heating mechanism including a heating coil and a coil support for fixing the heating coil to the inner wall of the inner tank.

[0013] Preferably, the heating coils are arranged in layers along the height direction of the inner tank.

[0014] Preferably, each heating coil is connected to an independent heat medium inlet with a valve.

[0015] Preferably, the heating mechanism further includes a heat exchanger having an inlet end and an outlet end. The inlet end of the heat exchanger is connected to a main inlet for the heat medium, and the outlet end of the heat exchanger is connected to a branch inlet for the heat medium.

[0016] Preferably, the heating mechanism further includes a circulating pump, a heat medium branch outlet, and a heat medium main outlet; the outlet ends of the heating coil converge to form the heat medium branch outlet, the heat medium branch outlet is connected to the heat medium main outlet, the heat medium main outlet is connected to the inlet end of the circulating pump, and the outlet end of the circulating pump is connected to the inlet end of the heat exchanger.

[0017] Preferably, the oilfield storage tank with insulation layer also includes a base, and the inner tank is situated on the base.

[0018] This utility model has the following beneficial effects: 1. In this utility model, honeycomb reinforcing ribs made of glass fiber reinforced plastic are used to connect the inner tank and the outer tank, and rock wool is filled in the honeycomb structure. This solves the problems of poor heat insulation performance caused by the serious thermal bridging effect of metal connectors in existing oil storage tanks, and the need to increase the tank wall thickness to ensure strength, which leads to a bulky structure. This achieves the technical effect of combining lightweight structure, high strength and efficient heat insulation.

[0019] 2. In this utility model, by arranging the heating coils in layers along the height of the tank and equipping each layer of the coils with an independent control valve, the problem of existing heating methods being unable to adjust the heating area according to the actual oil level, resulting in serious energy waste when the oil storage volume is small, is solved. This achieves the technical effect of precise heating on demand, significantly improving energy utilization and reducing operating costs. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of an oilfield storage tank with a thermal insulation interlayer proposed in this utility model. Figure 2 This is a schematic diagram of the outer tank structure of an oilfield storage tank with a heat-insulating interlayer proposed in this utility model. Figure 3 A schematic diagram of the honeycomb-shaped reinforcing rib structure of an oilfield storage tank with a thermal insulation interlayer proposed in this utility model. Figure 4 This is a schematic diagram of the heating coil section of an oilfield storage tank with an insulation jacket proposed in this utility model.

[0021] Legend: 1. Base; 2. Inner tank; 3. Insulation mechanism; 301. Outer tank; 302. Epoxy coal tar coating; 303. Honeycomb reinforcing ribs; 304. Rock wool; 4. Heating mechanism; 401. Circulating pump; 402. Main inlet of heat medium; 403. Heat exchanger; 404. Branch inlet of heat medium; 405. Valve; 406. Heating coil; 407. Branch outlet of heat medium; 408. Main outlet of heat medium; 409. Coil support. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 4 This utility model provides an oilfield storage tank with an insulation jacket, which aims to solve the problems in existing oilfield storage tanks where the metal connector between the inner tank 2 and the outer tank 301 is prone to thermal bridging, resulting in poor insulation performance, and where increasing the tank wall thickness to ensure structural strength would significantly increase the tank's self-weight and load.

[0024] The oilfield storage tank with insulation layer includes a base 1 and an inner tank 2 located on the base 1, with an insulation mechanism 3 installed on the outside of the inner tank 2.

[0025] The insulation mechanism 3 includes an outer tank 301, which is coaxially sleeved on the outside of the inner tank 2, and forms an insulation interlayer between the inner tank 2 and the outer tank 301 for accommodating insulation material; a honeycomb reinforcing rib 303 is provided in the insulation interlayer, which is made of glass fiber reinforced plastic. The structure of the honeycomb reinforcing rib 303 spans between the outer wall of the inner tank 2 and the inner wall of the outer tank 301. The honeycomb reinforcing rib 303 connects the inner tank 2 and the outer tank 301 into a stable integral structure by means of fixed connection. The honeycomb-shaped hollow structure of the honeycomb reinforcing rib 303 is filled with rock wool 304 as insulation material. The rock wool 304 fills the honeycomb cavity and works together with the honeycomb reinforcing rib 303 made of glass fiber reinforced plastic to effectively block the heat conduction path between the inner tank 2 and the outer tank 301. In order to protect the long-term performance of the insulation mechanism 3, an epoxy coal tar coating 302 is coated on the outer wall surface of the outer tank 301. The epoxy coal tar coating 302 is used to isolate external moisture and prevent corrosion of the outer tank 301.

[0026] The core component of the heating mechanism 4 is the heating coil 406, which is fixed to the inner wall of the inner tank 2 by the coil support 409. In order to achieve uniform and efficient heating, the heating coil 406 is arranged in layers along the height direction of the inner tank 2 to form multiple independent heating levels. Each heating coil 406 is connected to an independent heat medium inlet 404, and a valve 405 is installed on the pipeline of the heat medium inlet 404. By controlling the opening and closing of different valves 405, the heating coil 406 of the corresponding level can be selectively activated for heating. The heating mechanism 4 also includes a circulation pump 401 for driving the circulation of the heat medium and a heat exchanger 403 for heating the heat medium, which together form a complete closed-loop circulation circuit. Specifically, the inlet end of the heat exchanger 403 is connected to the total heat medium inlet 402, and the outlet end of the heat exchanger 403 is connected to each heat medium branch inlet 404. The outlet ends of the heating coils 406 converge to form heat medium branch outlets 407, and all heat medium branch outlets 407 eventually converge and connect to the total heat medium outlet 408. The pipeline of the total heat medium outlet 408 is connected to the inlet end of the circulation pump 401, and the outlet end of the circulation pump 401 is connected back to the inlet end of the heat exchanger 403, thereby forming a forced circulation flow of the heat medium.

[0027] As a preferred embodiment, to enhance the overall protective capability and durability of the insulation mechanism 3, an epoxy coal tar coating 302 is uniformly coated on the outer wall surface of the outer tank 301. The epoxy coal tar coating 302 provides physical isolation for the outer tank 301, preventing moisture and corrosive substances in the external environment from eroding the tank.

[0028] As another preferred embodiment, in order to achieve flexible control and energy saving of the crude oil heating process in the inner tank 2, the heating coils 406 are arranged in layers along the vertical height of the inner tank 2, and each layer of heating coils 406 is equipped with a heat medium inlet 404 with an independent valve 405. This structure allows for selective activation of some heating coils 406 by opening or closing the valves 405 of the corresponding layer according to the actual liquid level of the crude oil in the tank.

[0029] As a preferred configuration for the complete working loop of the heating mechanism 4, the heating mechanism 4 further includes a heat exchanger 403 and a circulating pump 401, and the components are connected by pipelines to form a closed-loop system. The total inlet of the heat medium 402 is connected to the heat exchanger 403, the outlet of the heat exchanger 403 is connected to the heat medium branch inlet 404, and the outlet end of the heating coil 406 is connected to the inlet of the circulating pump 401 through the heat medium branch outlet 407 and the total outlet of the heat medium 408. The outlet of the circulating pump 401 is finally connected back to the inlet of the heat exchanger 403, thus forming a complete heating loop that enables forced circulation of the heat medium.

[0030] As a preferred embodiment, to ensure the installation stability and load-bearing capacity of the entire oil storage tank, the oilfield oil storage tank also includes a base 1, with the bottom of the inner tank 2 resting on the top surface of the base 1. The base 1 provides a solid and stable foundation for the entire tank structure.

[0031] Working principle: When crude oil is injected into the inner tank 2 for storage, the insulation mechanism 3 plays a passive insulation role. During the process of heat transfer from the crude oil in the inner tank 2 to the outside, it will pass through the honeycomb reinforcing ribs 303 made of glass fiber reinforced plastic and the rock wool 304 filled inside the honeycomb structure. Since both rock wool 304 and glass fiber reinforced plastic are materials with extremely low thermal conductivity, this structural combination effectively blocks the main heat conduction path between the inner tank 2 and the outer tank 301, greatly reduces the thermal bridge effect, and thus significantly reduces heat loss. When it is necessary to actively heat the crude oil in the inner tank 2, the circulation pump 401 of the heating mechanism 4 is started. The heat medium enters the heat exchanger 403 through the heat medium main inlet 402 and is heated. The heated heat medium enters the designated heating coil 406 through the heat medium branch inlet 404 and valve 405 and circulates, efficiently transferring heat to the crude oil in the inner tank 2. After the heat exchange is completed, the heat medium is collected through the heat medium branch outlet 407 to the heat medium main outlet 408 and finally returns to the circulation pump 401, thus forming a complete forced circulation heating loop. By selectively opening or closing the valves 405 corresponding to the heating coils 406 at different levels, the heating area can be precisely controlled according to the actual level of crude oil in the inner tank 2, and only the part containing crude oil is heated. This avoids ineffective heating of the empty space in the upper part of the tank, thereby significantly improving energy utilization efficiency.

Claims

1. An oilfield storage tank with an insulated jacket, comprising: Inner tank (2) and heat preservation mechanism (3) disposed outside the inner tank (2); Its characteristic is that the heat preservation mechanism (3) includes: The outer tank (301) is coaxially sleeved on the outside of the inner tank (2) to form an insulation interlayer between the inner tank (2) and the outer tank (301); Honeycomb reinforcing rib (303), the honeycomb reinforcing rib (303) is made of glass fiber reinforced plastic, and the honeycomb reinforcing rib (303) spans between the outer wall of the inner tank (2) and the inner wall of the outer tank (301), for fixing the inner tank (2) and the outer tank (301) together. And rock wool (304) filling the honeycomb structure inside the honeycomb reinforcing ribs (303).

2. An oilfield storage tank with an insulation jacket as described in claim 1, characterized in that: The outer wall of the outer tank (301) is coated with an epoxy coal tar coating (302).

3. An oilfield storage tank with an insulation jacket as described in claim 1, characterized in that: The oilfield storage tank also includes a heating mechanism (4) installed inside the inner tank (2). The heating mechanism (4) includes a heating coil (406) and a coil support (409) for fixing the heating coil (406) to the inner wall of the inner tank (2).

4. An oilfield storage tank with an insulation jacket as described in claim 3, characterized in that: The heating coil (406) is arranged in layers along the height direction of the inner tank (2).

5. An oilfield storage tank with an insulation jacket as described in claim 4, characterized in that: Each heating coil (406) is connected to an independent heat medium inlet (404) with a valve (405).

6. An oilfield storage tank with an insulation jacket as described in claim 5, characterized in that: The oilfield storage tank also includes a heat exchanger (403), which has an inlet end and an outlet end. The inlet end of the heat exchanger (403) is connected to a main inlet (402) for the heat medium, and the outlet end of the heat exchanger (403) is connected to a branch inlet (404) for the heat medium.

7. An oilfield storage tank with an insulation jacket as described in claim 6, characterized in that: The heating mechanism (4) further includes a circulating pump (401), a heat medium branch outlet (407), and a heat medium main outlet (408); the outlet end of the heating coil (406) converges to form the heat medium branch outlet (407), the heat medium branch outlet (407) is connected to the heat medium main outlet (408), the heat medium main outlet (408) is connected to the inlet end of the circulating pump (401), and the outlet end of the circulating pump (401) is connected to the inlet end of the heat exchanger (403).

8. An oilfield storage tank with an insulation jacket as described in claim 1, characterized in that: The oilfield storage tank also includes a base (1), and the inner tank (2) is located on the base (1).

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