A method for overall thermal insulation of elevated metal oil storage tanks

Abstract

This invention provides a method for the overall insulation of elevated metal oil storage tanks. The elevated metal oil storage tank insulation system includes a tank top operating platform, a tank front operating platform, ladder beams, a single tank, a ladder, and treads. Heat loss is reduced by determining the quantity and material of the insulation layer of the metal oil storage tank body, the saddle, the metal high bracket, the ladder and tank top platform, the inlet and outlet oil pipelines, the covered openings, and the static protrusions. This insulation method solves the high energy consumption problem of elevated metal oil storage tanks and meets the current requirements of green and low-carbon oil fields.

Description

Technical Field

[0001] The invention belongs to the field of oilfield surface gathering and transportation, and in particular relates to an overall thermal insulation method for an elevated metal oil storage tank. Background Art

[0002] Elevated metal oil storage tanks are widely used in oilfield production due to their simple installation, small size, and flexible lifting and handling. They are particularly suitable for temporary storage of crude oil in oil-drawn stations that are not yet connected to the system. Loading is done by liquid gravity without power, so elevated tanks are used.

[0003] Because the freezing point of stored crude oil is generally higher than the ambient temperature, heat diffusion occurs. If left unchecked, the crude oil will reach its freezing point and solidify. To ensure proper transportation, the fluidity of the crude oil must be maintained. Therefore, elevated storage tanks are typically temperature-maintained, and this requires insulation. The quality of the insulation directly determines the energy required for this maintenance.

[0004] Existing elevated metal oil storage tanks generally use traditional rough insulation methods. The tank is wrapped with rock wool or glass wool and protected with tarpaulin. The inlet and outlet oil pipelines are also insulated with rock wool or glass wool. However, the metal high brackets and various openings are not fully insulated. Due to the thermal conductivity and thickness of the insulation material, as well as the lack of insulation treatment at many interfaces, a thermal bridge effect is formed. The entire elevated metal oil storage tank becomes a "huge" heat sink, resulting in large heat loss. A large amount of heat energy is required to maintain the temperature of the crude oil during the production process. Taking an oil field in Inner Mongolia as an example, an elevated metal oil storage tank at an oil pumping point consumes up to 102,000 kWh of electricity per year, which is not suitable for the current requirements of green and low-carbon oil fields.

[0005] In summary, it is necessary to design an overall insulation method for elevated metal oil storage tanks to reduce heat loss. Summary of the Invention

[0006] The purpose of the present invention is to make up for the shortcomings of the prior art, provide an elevated metal oil storage tank insulation method, and solve the high energy consumption problem of the elevated metal oil storage tank.

[0007] A method for insulating an elevated metal oil storage tank is based on an elevated metal oil storage tank composed of a metal oil storage tank, a metal high support, and a ladder. The metal oil storage tank is composed of a saddle, a heat medium port, an oil inlet and outlet pipelines, a liquid level gauge port, a hydraulic safety valve port, a normal pressure manhole, a static pressure liquid level gauge port, a breathing valve port, an oil measuring hole, a bottom water drain port, and a tank top platform. The method specifically includes the following contents:

[0008] Step 1: Determine the number and material of the insulation layer of the metal oil storage tank body, wherein the metal oil storage tank body adopts three layers of insulation material;

[0009] The innermost layer is covered with a heat-insulating and anti-corrosion coating, the middle layer is a 5-10cm heat-insulating layer, and the outermost layer is wrapped with a metal skin as a protective layer;

[0010] Step 2: Determine the insulation method of the metal oil storage tank saddle. The side of the tank saddle is covered with a heat-insulating and anti-corrosion coating.

[0011] The bottom layer is covered with heat-insulating and anti-corrosion coating, the middle layer is insulated with rock wool or PU wool, and the outermost layer is wrapped with metal skin as a protective layer;

[0012] Step 3: Determine the insulation method of the metal high bracket, and the metal high bracket is covered with a heat-insulating and anti-corrosion coating.

[0013] Among them, two layers of protection are added on the side: the inner part is wrapped with 1-1.5cm thermal insulation material, and the outer part is wrapped with aluminum foil to cut off heat transfer;

[0014] Step 4: Determine the insulation method for the ladder and the tank top platform. The ladder and the tank top platform are wrapped with 0.5 cm aluminum foil thermal insulation material to cut off heat transfer.

[0015] Step 5: Determine the insulation method for the inlet and outlet oil pipelines. The inlet and outlet oil pipelines are all covered with a heat-insulating and anti-corrosion coating and wrapped with aluminum foil for insulation.

[0016] Step 6: Determine the insulation method for the covered openings, including the normal pressure manhole, the static pressure level gauge port, and the oil measuring hole.

[0017] Among them, the normal pressure manhole, static pressure level gauge port, and oil measuring hole are all covered with heat insulation and anti-corrosion coating, and a concave insulation cover is added for thermal insulation protection;

[0018] Step 7: Determine the static protrusion insulation method, the static protrusion includes the heat medium port, oil inlet and outlet, liquid level gauge port, hydraulic safety valve port, breathing valve port and bottom water drain port,

[0019] Among them, the heat medium port, oil inlet and outlet, liquid level gauge port, hydraulic safety valve port, breathing valve port and bottom water discharge port are all covered with heat-insulating and anti-corrosion coating, and are wrapped with PU material for insulation, and protected by a metal outer skin.

[0020] Furthermore, the thermal insulation and anti-corrosion coating is made of a material with high thermal insulation efficiency and an expansion coefficient similar to that of a metal oil storage tank.

[0021] A device for overall thermal insulation of elevated metal oil storage tanks, comprising a tank top operating platform, a tank front operating platform, a ladder, a metal oil storage tank, and a metal high bracket.

[0022] The metal oil storage tank is installed on a metal high bracket and is welded to the tank top operating platform and the tank front operating platform respectively. The man ladder is overlapped and installed with the tank top platform and the metal high bracket respectively.

[0023] The man ladder is provided with ladder beams and treads, and the treads are steel grating plates.

[0024] The embodiments of the present invention bring the following beneficial effects:

[0025] The heat preservation method designed in the present invention solves the high energy consumption problem of elevated metal oil storage tanks, reduces heat loss, and is suitable for the requirements of current green and low-carbon oil fields.

[0026] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purposes and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A front view of an elevated oil storage tank insulation method for an elevated metal oil storage tank provided by an embodiment of the present invention;

[0029] Figure 2 A side view of an elevated oil storage tank insulation method for an elevated metal oil storage tank provided by an embodiment of the present invention;

[0030] Figure 3 A side view of an elevated oil storage tank ladder and elevated insulation according to an overall insulation method for an elevated metal oil storage tank provided by an embodiment of the present invention;

[0031] Figure 4 A front view of an elevated oil storage tank ladder and elevated insulation according to an overall insulation method for an elevated metal oil storage tank provided by an embodiment of the present invention.

[0032] Among them, 1-lifting ear; 2-liquid level gauge port; 3-oil inlet and outlet; 4-heat medium port; 5-saddle; 6-bracket; 7-hydraulic safety valve port; 8-normal pressure manhole; 9-static pressure level gauge port; 10-breathing valve port; 11-oil measuring hole port; 12-ground sewage outlet; J-1\-2\-3: foundation. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The embodiment of the present invention provides an overall insulation method for an elevated metal oil storage tank, based on an elevated metal oil storage tank composed of a metal oil storage tank, a metal high bracket 6 and a ladder, such as Figure 1-4 As shown, the metal oil storage tank consists of a lifting lug 1, a liquid level gauge port 2, an oil inlet and outlet 3, a heat medium port 4, a saddle 5, a hydraulic safety valve port 7, a normal pressure manhole 8, a static pressure liquid level gauge port 9, a breathing valve port 10, an oil measuring port 11, a ground sewage outlet 12 and a tank top platform. The metal oil storage tank is installed on a metal high bracket and is welded to the tank top operating platform and the tank front operating platform respectively. The man ladder is overlapped and installed with the tank top platform and the metal high bracket respectively. The man ladder is provided with ladder beams and treads, and the treads are steel grating plates.

[0035] Specifically include the following:

[0036] Step 1: Determine the quantity and material of the insulation layer of the metal oil storage tank;

[0037] The metal oil storage tank body adopts three layers of protection. The innermost layer is covered with a heat-insulating and anti-corrosion coating with a coefficient of expansion equivalent to that of the metal tank as the base, the middle layer is a 5-10cm heat-insulating layer, and the outermost layer is wrapped with a metal skin as a protective layer.

[0038] In this example, three layers of protection are compared with two layers of protection:

[0039] Two layers of protection are used: an anti-corrosion layer, a 5-10cm insulation layer in the middle, and insulation and insulation cotton wrapping at the interfaces as much as possible; the outermost layer is wrapped with a metal outer skin (anti-corrosion treatment) as a protective layer; the temperature drops by 4°C in 1 hour and 20°C in 10 hours;

[0040] Three layers of protection are used: the innermost layer is covered with a heat-insulating and anti-corrosion coating with a coefficient of expansion equivalent to that of the metal tank as the basis, including various interfaces of the tank body; the middle layer uses a 5-10cm heat-insulating layer, and the interfaces are also insulated and wrapped with heat-insulating cotton as much as possible; the outermost layer is wrapped with a metal skin (anti-corrosion treated) as a protective layer; the temperature drops by 2°C in 1 hour and 8°C in 10 hours.

[0041] Therefore, the tank body is selected as the overall three-layer insulation material, and through the factors of thermal insulation efficiency and expansion coefficient, the thermal insulation and anti-corrosion coating with high thermal insulation efficiency and expansion coefficient similar to that of the metal tank is selected.

[0042] Step 2: Determine the insulation method of the metal oil storage tank saddle. The side of the tank saddle is covered with a heat-insulating and anti-corrosion coating.

[0043] The bottom layer is covered with heat-insulating and anti-corrosion coating, the middle layer is insulated with rock wool or PU wool, and the outermost layer is wrapped with metal skin as a protective layer;

[0044] Step 3: Determine the insulation method of the metal high bracket, and the metal high bracket is covered with a heat-insulating and anti-corrosion coating.

[0045] Among them, two layers of protection are added to the side: first, it is wrapped with 1-1.5cm thermal insulation material, and then wrapped with aluminum foil tape to prevent heat transfer;

[0046] Step 4: Determine the insulation method for the ladder and the tank top platform. The ladder and the tank top platform are wrapped with 0.5 cm aluminum foil thermal insulation material to cut off heat transfer.

[0047] Step 5: Determine the insulation method of the inlet and outlet oil pipelines. The inlet and outlet oil pipelines are all covered with heat-insulating and anti-corrosion coatings and wrapped with aluminum foil for insulation.

[0048] Step 6: Determine the insulation method for the covered openings, including the normal pressure manhole, the static pressure level gauge port, and the oil measuring hole.

[0049] Among them, the normal pressure manhole, static pressure level gauge port, and oil measuring hole are all covered with heat insulation and anti-corrosion coating, and a concave insulation cover is added for thermal insulation protection;

[0050] Step 7: Determine the static protrusion insulation method, the static protrusion includes the heat medium port, oil inlet and outlet, liquid level gauge port, hydraulic safety valve port, breathing valve port and bottom water drain port,

[0051] Among them, the heat medium port, oil inlet and outlet, liquid level gauge port, hydraulic safety valve port, breathing valve port and bottom water discharge port are all covered with a heat-insulating and anti-corrosion coating, and then wrapped with PU material for insulation, and protected with a metal outer skin.

[0052] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for overall thermal insulation of an elevated metal oil storage tank, based on an elevated metal oil storage tank consisting of a metal oil storage tank, a metal high support, and a ladder. The metal oil storage tank consists of a saddle, a heat medium port, an oil inlet and outlet pipelines, a liquid level gauge port, a hydraulic safety valve port, a normal pressure manhole, a static pressure liquid level gauge port, a breathing valve port, an oil measuring hole, a bottom water drain port, and a tank top platform. The method is characterized in that: Includes the following: Step 1: Determine the number and material of the insulation layer of the metal oil storage tank body, wherein the metal oil storage tank body adopts three layers of insulation material; The innermost layer is covered with a heat-insulating and anti-corrosion coating, the middle layer is a 5-10cm heat-insulating layer, and the outermost layer is wrapped with a metal skin as a protective layer; Step 2: Determine the insulation method of the metal oil storage tank saddle. The side of the tank saddle is covered with a heat-insulating and anti-corrosion coating. The bottom layer is covered with heat-insulating and anti-corrosion coating, the middle layer is insulated with rock wool or PU wool, and the outermost layer is wrapped with metal skin as a protective layer; Step 3: Determine the insulation method of the metal high bracket, and the metal high bracket is covered with a heat-insulating and anti-corrosion coating. Among them, two layers of protection are added on the side: the inner part is wrapped with 1-1.5cm thermal insulation material, and the outer part is wrapped with aluminum foil to cut off heat transfer; Step 4: Determine the insulation method for the ladder and the tank top platform. The ladder and the tank top platform are wrapped with 0.5 cm aluminum foil thermal insulation material to cut off heat transfer. Step 5: Determine the insulation method for the inlet and outlet oil pipelines. The inlet and outlet oil pipelines are all covered with a heat-insulating and anti-corrosion coating and wrapped with aluminum foil for insulation. Step 6: Determine the insulation method for the covered openings, including the normal pressure manhole, the static pressure level gauge port, and the oil measuring hole. Among them, the normal pressure manhole, static pressure level gauge port, and oil measuring hole are all covered with heat insulation and anti-corrosion coating, and a concave insulation cover is added for thermal insulation protection; Step 7: Determine the static protrusion insulation method, the static protrusion includes the heat medium port, oil inlet and outlet, liquid level gauge port, hydraulic safety valve port, breathing valve port and bottom water drain port, Among them, the heat medium port, oil inlet and outlet, liquid level gauge port, hydraulic safety valve port, breathing valve port and bottom water discharge port are all covered with heat-insulating and anti-corrosion coating, and are wrapped with PU material for insulation, and protected by a metal outer skin.

2. The overall insulation method of an elevated metal oil storage tank according to claim 1 is characterized in that: The heat-insulating and anti-corrosion coating is made of a material with high heat-insulating efficiency and a coefficient of expansion similar to that of a metal oil storage tank.

3. A device using the overall insulation method of elevated metal oil storage tanks according to claim 1, characterized in that: Including tank top operating platform, tank front operating platform, ladder, metal oil storage tank, metal high bracket, The metal oil storage tank is installed on a metal high bracket and is welded to the tank top operating platform and the tank front operating platform respectively. The man ladder is overlapped and installed with the tank top platform and the metal high bracket respectively. The man ladder is provided with ladder beams and treads, and the treads are steel grating plates.

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