Oil conveying pipeline heat tracing system and heavy oil conveying system

Abstract

The utility model provides an oil conveying pipeline heat tracing system and a heavy oil conveying system. Oil pressure of heat conduction oil in a circulation subsystem is balanced through an oil storage balance subsystem; heat conduction oil is fed into a heating assembly to be heated through a circulating oil pump in the circulating subsystem, the heated heat conduction oil is guided into a jacket assembly to heat an oil conveying pipeline, and heavy oil in the oil conveying pipeline is prevented from being solidified and blocked. And the heat-conducting oil flowing out of the jacket assembly in a circulating manner enters the circulating oil pump and is subjected to heating circulating operation again. According to the heat tracing system for the oil conveying pipeline, heat conduction oil serves as a heat conduction medium, the heating temperature of the heat conduction oil can reach 300 DEG C, the heating effect on the oil conveying pipeline is better, circulating heat supply is adopted, heat loss is reduced, meanwhile, freezing is not prone to occurring, and the problems that an existing heavy oil heat tracing device is large in limitation, low in heat tracing efficiency and the like are solved. And inconvenience is brought to transportation and application of the heavy oil.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oil pipeline heat tracing technical field, concretely relates to an oil pipeline heat tracing system and heavy oil conveying system. BACKGROUND

[0002] Heavy oil is an important product in the petroleum and chemical industry, due to its specific physical and chemical properties, has a wide range of uses and value in the production of high-grade fuel oil, lubricating oil and other chemical products and other fields.

[0003] Due to the characteristics of heavy oil with large molecular weight, high viscosity, in the process of heavy oil conveying, may gradually occur solidification or block the pipeline, not only will affect the smoothness of production process, may also cause damage to equipment and safety hazards. Therefore, in order to ensure the smooth conveying of heavy oil in the oil pipeline, in the process of heavy oil conveying, often use heat tracing device to provide heating for its oil pipeline, prevent heavy oil solidification.

[0004] In the prior art, the heat tracing device of the oil pipeline is mostly steam heat tracing, hot water heat tracing or electric heat tracing, to heat the oil pipeline. However, in the above prior art, when steam or hot water is used to heat the oil pipeline, the heating temperature is limited, and freezing is easy to occur in winter, which causes damage to the equipment. When electric heat tracing is used, there is a technical problem of high power consumption and high cost in the process of continuous use. Therefore, the existing oil pipeline heat tracing device has great limitations, which brings inconvenience to the conveying and application of heavy oil. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problems in the background art that the existing oil pipeline heat tracing device has great limitations, which brings inconvenience to the conveying and application of heavy oil, the utility model provides an oil pipeline heat tracing system and heavy oil conveying system.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] Firstly, the utility model provides an oil pipeline heat tracing system, which comprises a circulating subsystem and an oil storage balancing subsystem. The circulating subsystem comprises a circulating oil pump, a heating assembly, a circulating pipeline and a jacket assembly. The circulating pipeline is in turn connected with the circulating oil pump, the heating assembly and the jacket assembly. The jacket assembly is partially arranged on the oil pipeline. The circulating pipeline contains heat conducting oil. The oil storage balancing subsystem is connected with the circulating pipeline, and the oil storage balancing subsystem contains heat conducting oil.

[0008] Optionally, the heating assembly is any one of heat conducting oil heater, organic heat carrier furnace or electric heating heat conducting oil furnace.

[0009] Optionally, the oil storage balance subsystem comprises: an expansion tank, an oil storage tank, an oil transfer pump and a connecting pipeline; the connecting pipeline connects the expansion tank and the oil storage tank; the oil storage tank contains heat conducting oil; the oil transfer pump is arranged on the connecting pipeline and between the oil storage tank and the expansion tank; the expansion tank is connected with the circulating pipeline and is connected between the jacket assembly and the circulating oil pump; the installation position of the expansion tank is higher than the entire circulating subsystem and the oil storage tank.

[0010] Optionally, the circulating subsystem further comprises an oil-gas separator; the oil-gas separator is connected between the jacket assembly and the circulating oil pump, and the oil-gas separator is vertically installed; the expansion tank is connected with the circulating pipeline through the oil-gas separator.

[0011] Optionally, an expansion pipe is connected between the expansion tank and the oil-gas separator; the expansion pipe forms an angle of 30-60 degrees with the horizontal direction, and the length of the expansion pipe is 1-1.5 meters.

[0012] Optionally, a liquid level meter is further arranged on the expansion tank.

[0013] Optionally, a safety valve is further arranged in the circulating subsystem; the safety valve is arranged on the circulating pipeline and between the heating assembly and the jacket assembly; the safety valve is connected with the oil storage tank.

[0014] Optionally, the oil storage balance subsystem further comprises a nitrogen sealing valve group; the nitrogen sealing valve group is arranged on the upper portion of the expansion tank and is connected with the expansion tank.

[0015] Optionally, the circulating oil pump is two, and the two circulating oil pumps are connected in parallel in the circulating pipeline.

[0016] In the second aspect, the utility model also provides a heavy oil conveying system, the heavy oil conveying system includes oil pipeline and above any one oil pipeline heat tracing system of the heavy oil conveying system;The jacket assembly part of the oil pipeline heat tracing system is arranged on the oil pipeline.

[0017] The utility model has the advantages of:

[0018] The utility model provides a kind of oil pipeline heat tracing system, by oil storage balance subsystem to the supply and recovery of heat conducting oil to circulating subsystem, to balance the oil pressure of heat conducting oil in circulating subsystem;Heat conducting oil is sent into heating assembly by circulating oil pump in circulating subsystem and is heated, heat conducting oil after heating is introduced into jacket assembly, and oil pipeline is heated, prevent heavy oil in oil pipeline from freezing and plugging;Heat conducting oil circulating from jacket assembly enters circulating oil pump again, and heating circulation operation is carried out again.In the utility model, since heat conducting oil is used as heat conducting medium, its heating temperature can reach 300 degrees Celsius, the heating temperature range is larger, and the heating effect of oil pipeline is better, and circulating heating is used, and the loss of heat is reduced, and since the freezing point of heat conducting oil is lower than water, freezing is not easy to occur in winter, and the oil pipeline heat tracing system in the utility model solves the technical problems that the oil pipeline heat tracing device in the prior art has great limitation and is inconvenient for the transportation and application of heavy oil. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the schematic diagram of the oil pipeline heat tracing system in the utility model.

[0020] Among them: 1, circulating subsystem;11, circulating oil pump;12, heating assembly;13, circulating pipeline;14, jacket assembly;15, oil-gas separator;16, safety valve;2, oil storage balance subsystem;21, expansion tank;211, liquid level meter;22, oil storage tank;23, oil pump;24, connecting pipeline;25, nitrogen seal valve group;3, expansion pipe. DETAILED DESCRIPTION

[0021] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in the following with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. The description of at least one exemplary embodiment is actually only illustrative, not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, the singular form is intended to include the plural form unless the context clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or their combination.

[0023] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the Examples are not intended to limit the scope of the present application unless otherwise specifically stated. Also, it is to be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for ease of illustration. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered within the scope of the disclosure. In all examples shown and discussed herein, any specific values are to be interpreted as illustrative only and not limiting. Thus, other examples of exemplary embodiments can have different values. It is to be noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion with regard thereto is deemed necessary.

[0024] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application: the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0025] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] Referring to Figure 1, shows a schematic diagram of an oil pipeline heat tracing system described in the application, which comprises a circulating subsystem 1 and an oil storage balancing subsystem 2; the circulating subsystem 1 comprises: a circulating oil pump 11, a heating assembly 12, a circulating pipeline 13 and a jacket assembly 14; the circulating pipeline 13 is in turn communicated with the circulating oil pump 11, the heating assembly 12 and the jacket assembly 14; the jacket assembly 14 is partially arranged on the oil pipeline; the circulating pipeline 13 contains heat conducting oil; the oil storage balancing subsystem 2 is communicated with the circulating pipeline 13, and the oil storage balancing subsystem 2 stores heat conducting oil.

[0028] In the embodiment, the heat conducting oil is supplied and recovered to the circulating subsystem 1 through the oil storage balancing subsystem 2 to balance the oil pressure of the heat conducting oil in the circulating subsystem 1; the heat conducting oil is sent into the heating assembly 12 by the circulating oil pump 11 in the circulating subsystem 1 to be heated, and the heated heat conducting oil is introduced into the jacket assembly 14 to heat the oil pipeline to prevent the heavy oil in the oil pipeline from being frozen and blocked; the heat conducting oil circulating out of the jacket assembly 14 enters the circulating oil pump 11 to be heated and circulated again, and since the heat conducting oil is used as the heat conducting medium, the heating temperature can reach 250-300 DEG C, the heating effect on the oil pipeline is better, and the heat loss is reduced by using the circulating heating, and since the freezing point of the heat conducting oil is lower than that of water, freezing is less likely to occur in winter, and the oil pipeline heat tracing system in the application solves the technical problems of the prior art that the oil pipeline heat tracing device has great limitations and brings inconvenience to the transportation and application of heavy oil.

[0029] Further, the heat conducting oil in the application is synthetic heat conducting oil, mineral heat conducting oil or other heat conducting oils known to those skilled in the art, which is not limited in the embodiment.

[0030] Further, the heavy oil in the application can be tar, residual oil, industrial heavy oil and other types of heavy oil known to those skilled in the art.

[0031] Optionally, the heating assembly 12 in the application is any one of a heat conducting oil heater, an organic heat carrier furnace or an electric heating heat conducting oil furnace.

[0032] In the embodiment, the heating assembly 12 is any one of a heat conducting oil heater, an organic heat carrier furnace or an electric heating heat conducting oil furnace, which can heat the heat conducting oil to above 250 DEG C and has high safety. It should be noted that those skilled in the art can select the type and kind of the heating assembly 12 according to actual production and use requirements.

[0033] Optionally, the utility model discloses a storage oil balance subsystem 2 includes: expansion tank 21, oil storage tank 22, oil pump 23 and connecting pipeline 24, connecting pipeline 24 communicates expansion tank 21 and oil storage tank 22, oil storage tank 22 contains heat conducting oil, oil pump 23 is set up on connecting pipeline 24, and is between oil storage tank 22 and expansion tank 21, expansion tank 21 communicates circulating pipeline 13, and the junction is between jacket assembly 14 and circulating oil pump 11, the installation position of expansion tank 21 is higher than the whole circulating subsystem 1.

[0034] In the embodiment, the storage of heat conducting oil is carried out through the oil storage tank 22, and in use, the heat conducting oil is input into the expansion tank 21 through the oil pump 23 for buffering, and then is input into the circulating pipeline 13, so that the safe oil supplement of the circulating subsystem 1 is realized; meanwhile, the installation position of the expansion tank 21 is higher than the whole circulating subsystem 1, and in the process of oil supplement, the reverse flow of the heat conducting oil is prevented.

[0035] Further, in the working process, the expansion tank 21 can be used to absorb the volume change of the heat conducting oil due to temperature change, so as to stabilize the whole oil pipeline heat tracing system. Meanwhile, when the heat conducting oil in the circulating subsystem 1 is excessive and is expanded by heat, the excessive heat conducting oil can flow into the expansion tank 21, so that the damage of the equipment in the circulating subsystem 1 due to the excessively high pressure is prevented.

[0036] Optionally, the utility model discloses a circulating subsystem 1 still includes oil gas separator 15, oil gas separator 15 communicates between jacket assembly 14 and circulating oil pump 11, and oil gas separator 15 is vertically installed, expansion tank 21 communicates circulating pipeline 13 through oil gas separator 15.

[0037] In the embodiment, the circulating pipeline 13 and the expansion tank 21 are communicated through the oil gas separator 15, and in the use process, the heat conducting oil flows out from the jacket assembly 14, enters the oil gas separator 15, the oil gas separator 15 separates the water vapor, air and other light component gases in the circulating pipeline 13, and transports to the expansion tank 21, and meanwhile, when the heat conducting oil in the circulating subsystem 1 is excessive and is expanded by heat, the excessive heat conducting oil can flow into the expansion tank 21, so that the damage of the equipment in the circulating subsystem 1 due to the excessively high pressure is prevented.

[0038] Optionally, the utility model discloses that expansion pipe 3 is connected between expansion tank 21 and oil gas separator 15, the angle between expansion pipe 3 and horizontal direction is 30 degrees to 60 degrees, and the length of expansion pipe 3 is 1 meter to 1.5 meters.

[0039] In the embodiment, the expansion pipe 3 communicates the expansion tank 21 and the oil gas separator 15, so that the heat conducting oil can flow smoothly in the expansion tank 21 and the oil gas separator 15, and the stability of the system is maintained.

[0040] Further, the angle between the expansion pipe 3 and the horizontal direction is 30 degrees to 60 degrees, and the length of the expansion pipe 3 is 1 meter to 1.5 meters, so as to ensure that the exhaust gas is smooth and has a certain heat dissipation effect.

[0041] Specifically, the angle between the expansion pipe 3 and the horizontal direction can be selected as 30 degrees, 45 degrees or 60 degrees; and the length of the expansion pipe 3 can be selected as 1 meter, 1.25 meters or 1.5 meters.

[0042] Specifically, the expansion pipe 3 is connected with the liquid outlet at the lower part of the expansion tank 21 and the gas outlet at the upper end of the oil-gas separator 15.

[0043] Optionally, the expansion tank 21 in the utility model is further provided with a liquid level meter 211, and the liquid level meter 211 is connected with the inside of the expansion tank 21.

[0044] In the embodiment, the liquid level meter 211 is arranged on the expansion tank 21, and the liquid level of the heat conducting oil in the expansion tank 21 is monitored in real time during use, so as to prevent the heat conducting oil from overflowing due to misoperation during use.

[0045] Further, the expansion tank 21 can be further provided with an overflow port, and the overflow port is connected with the oil storage tank 22, so that when the liquid level of the heat conducting oil in the expansion tank 21 reaches the height of the overflow port, the heat conducting oil can flow into the oil storage tank 22 through the overflow port.

[0046] Further, the liquid level meter 211 can be specifically selected as a magnetic flap liquid level meter, a floating ball liquid level meter, a radar liquid level meter or other liquid level meters known by those skilled in the art, and is not limited in the embodiment.

[0047] Optionally, the circulating subsystem 1 in the utility model is further provided with a safety valve 16; the safety valve 16 is arranged on the circulating pipeline 13 and is between the heating assembly 12 and the jacket assembly 14; and the safety valve 16 is connected with the oil storage tank 22.

[0048] In the embodiment, the safety valve 16 is arranged in the circulating subsystem 1, the oil storage tank 22 and the circulating pipeline 13 are connected through the safety valve 16, so as to protect the circulating subsystem 1, and in particular, when the jacket assembly 14 is blocked or needs to be disassembled and repaired, the heat conducting oil can flow into the oil storage tank 22 through the safety valve 16.

[0049] Optionally, the oil storage balancing subsystem 2 in the utility model further comprises a nitrogen sealing valve group 25; the nitrogen sealing valve group 25 is arranged at the upper part of the expansion tank 21 and is connected with the expansion tank 21.

[0050] In the embodiment, nitrogen sealing valve group 25 is arranged on the upper portion of expansion tank 21, and in use, when the temperature in expansion tank 21 is too high, such as reaching 70 DEG C or above, nitrogen sealing valve group 25 can be opened, and nitrogen sealing is used to ensure that expansion tank 21 is isolated from air, to prevent the heat conducting oil from being oxidized to produce organic acid, to reduce the acid value of the heat conducting oil, to reduce thermal cracking reaction and oxidation reaction, to prolong the service life of the heat conducting oil, and to avoid safety hazards such as gasification, volatilization or oil spraying of the heat conducting oil, and to improve safety.

[0051] Optionally, the circulating oil pump 11 in the utility model is two, and the two circulating oil pumps 11 are connected in parallel in the circulating pipeline 13.

[0052] In the embodiment, two parallel circulating oil pumps 11 are arranged in the circulating pipeline 13, and one of the circulating oil pumps 11 is used as a standby oil pump to provide redundancy design for the system.

[0053] In the second aspect, the utility model also provides a heavy oil conveying system, the heavy oil conveying system includes an oil conveying pipeline and the oil conveying pipeline heat tracing system of any one of the above; the jacket assembly 14 part of the oil conveying pipeline heat tracing system is arranged on the oil conveying pipeline.

[0054] In the embodiment, the oil conveying pipeline heat tracing system is provided, and it should be noted that the oil conveying pipeline heat tracing system in the embodiment is consistent with any one of the oil conveying pipeline heat tracing systems described above in structure, consistent in use mode, and consistent in beneficial effects, and therefore will not be described again.

[0055] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An oil pipeline heat tracing system, characterized by, The oil pipeline heat tracing system comprises a circulating subsystem (1) and an oil storage balance subsystem (2); The circulating subsystem (1) comprises a circulating oil pump (11), a heating assembly (12), a circulating pipeline (13) and a jacket assembly (14); The circulating pipeline (13) is sequentially connected with the circulating oil pump (11), the heating assembly (12) and the jacket assembly (14); The jacket assembly (14) is partially arranged on the oil pipeline; The circulating pipeline (13) contains heat conducting oil; The oil storage balance subsystem (2) is connected with the circulating pipeline (13), and contains heat conducting oil.

2. The oil pipeline heat tracing system of claim 1, wherein, The heating assembly (12) is any one of a heat conducting oil heater, an organic heat carrier furnace or an electrically heated heat conducting oil furnace.

3. The oil pipeline heat tracing system of claim 1, wherein, The oil storage balance subsystem (2) comprises an expansion tank (21), an oil storage tank (22), an oil pump (23) and a connecting pipeline (24); The connecting pipeline (24) is connected with the expansion tank (21) and the oil storage tank (22); The oil storage tank (22) contains heat conducting oil; The oil pump (23) is arranged on the connecting pipeline (24) and between the oil storage tank (22) and the expansion tank (21); The expansion tank (21) is connected with the circulating pipeline (13) and the connection is between the jacket assembly (14) and the circulating oil pump (11); The installation position of the expansion tank (21) is higher than the installation positions of the circulating subsystem (1) and the oil storage tank (22).

4. The oil pipeline heat tracing system of claim 3, wherein, The circulating subsystem (1) further comprises an oil gas separator (15); The oil gas separator (15) is connected between the jacket assembly (14) and the circulating oil pump (11) and is vertically installed; The expansion tank (21) is connected with the circulating pipeline (13) through the oil gas separator (15).

5. The oil pipeline heat tracing system of claim 4, wherein, An expansion pipe (3) is arranged between the expansion tank (21) and the oil gas separator (15); The expansion pipe (3) forms an angle of 30-60 degrees with the horizontal direction, and the length of the expansion pipe (3) is 1-1.5 meters.

6. The oil pipeline heat tracing system of claim 3, wherein, A liquid level meter (211) is further arranged on the expansion tank (21).

7. The oil pipeline heat tracing system of claim 3, wherein, The circulating subsystem (1) further comprises a safety valve (16); The safety valve (16) is arranged on the circulating pipeline (13) and between the heating assembly (12) and the jacket assembly (14); The safety valve (16) is connected with the oil storage tank (22).

8. The oil pipeline heat tracing system of claim 3, wherein, The oil storage balance subsystem (2) further comprises a nitrogen sealing valve group (25); The nitrogen sealing valve group (25) is arranged on the upper portion of the expansion tank (21) and is connected with the expansion tank (21).

9. The oil pipeline heat tracing system of claim 1, wherein, The circulating oil pump (11) is two, and the two circulating oil pumps (11) are connected in parallel in the circulating pipeline (13).

10. A heavy oil delivery system characterized by, The heavy oil conveying system comprises an oil pipeline and the oil pipeline heat tracing system according to any one of claims 1-9; The jacket assembly (14) of the oil pipeline heat tracing system is partially arranged on the oil pipeline.

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