CN217816156U - BOG pipeline structure - Google Patents
BOG pipeline structure Download PDFInfo
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- CN217816156U CN217816156U CN202220356284.8U CN202220356284U CN217816156U CN 217816156 U CN217816156 U CN 217816156U CN 202220356284 U CN202220356284 U CN 202220356284U CN 217816156 U CN217816156 U CN 217816156U
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- pipeline
- buffer tank
- bog
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- pressure
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Abstract
The utility model discloses a BOG pipeline structure, including the BOG compressor, input pipeline and output pipeline, the input pipeline is parallelly connected on the road has first sub-pipeline and the sub-pipeline of second, be provided with first control valve on the first sub-pipeline, be provided with first buffer tank and second control valve on the second sub-pipeline, first buffer tank is connected with the second buffer tank through first pressure release pipeline, be provided with first relief valve on the first pressure release pipeline, the second buffer tank passes through the backflow pipeline and is connected with input pipeline, the second buffer tank is connected with second pressure release pipeline, be provided with the second relief valve on the second pressure release pipeline. The utility model discloses an adopt the structure of two buffer tanks, overall pipeline structure is ingenious, not only can step down to the input pipeline, but also can keep the BOG gas in the buffer tank with the help of the step-down in-process and carry out the pressure boost to the input pipeline for the input pressure of BOG compressor can be maintained on a good numerical level all the time, guarantees entire system's benign operation.
Description
Technical Field
The utility model relates to a BOG retrieves technical field, especially relates to a BOG pipeline structure.
Background
Can produce BOG gas in LNG production or warehousing and transportation process, flash steam promptly, BOG gas is gaseous or directly is used for the boiler combustion, or utilize recovery system to realize the liquefaction recovery, in order to improve recovery system's stability, the utility model discloses a boil off station BOG buffer system is disclosed in the utility model patent specification of publication number "CN215411401U", it realizes the inside stable effect of pipeline through setting up the buffer tank of switching formula, wherein be provided with the bleeder valve on the buffer tank, when the buffer tank internal pressure was too high, BOG gas can be in the air through the bleeder valve, because the inside pressure of pipeline often receives the influence of numerous factors, so generally be in uncontrollable trend, like this, if inside pressure is in lasting higher state, the bleeder valve can be in the open mode always, and then lead to the gaseous actual amount of bleeding of BOG great, cause the wasting of resources.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to avoid prior art's weak point, provide a BOG pipeline structure to effectively solve the weak point that exists among the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a BOG pipeline structure, includes BOG compressor and the input pipeline and the output pipeline that are connected with the BOG compressor, the last parallel connection of input pipeline has first sub-pipeline and second sub-pipeline, is provided with first control valve on the first sub-pipeline, is provided with first buffer tank and second control valve on the second sub-pipeline, first buffer tank is connected with the second buffer tank through first pressure release pipeline, is provided with first relief valve on the first pressure release pipeline, the second buffer tank pass through the backflow pipeline with the input pipeline is connected, and the second buffer tank is connected with second pressure release pipeline, is provided with the second relief valve on the second pressure release pipeline.
Furthermore, two second control valves are arranged on the second sub-pipeline, and the first buffer tank is located between the two second control valves.
Further, a first check valve is arranged on the first pressure relief pipeline.
Further, a third control valve is arranged on the first pressure relief pipeline.
Further, a second one-way valve is arranged on the return pipeline.
Further, a fourth control valve is arranged on the return pipeline.
Further, the connection position of the return pipeline and the input pipeline is positioned between the first buffer tank and the BOG compressor.
Further, a pressure gauge is arranged on the input pipeline.
The above technical scheme of the utility model following beneficial effect has: the utility model discloses an adopt the structure of two buffer tanks, overall pipeline structure is ingenious, not only can step down input pipeline, but also can persist the gaseous pressure boost to input pipeline in the buffer tank with the help of the step-down in-process, make the input pressure of BOG compressor can maintain on a good numerical value level all the time, guarantee entire system's benign operation, furthermore, the gaseous circumstances of diffusing of BOG can hardly appear in the structure of two buffer tanks, very big reduction the waste of resource, therefore, the clothes hanger is strong in practicability.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, a BOG pipeline structure according to this embodiment includes a BOG compressor 1, and an input pipeline 2 and an output pipeline 3 connected to the BOG compressor 1, where the input pipeline 2 is connected in parallel to a first sub-pipeline 4 and a second sub-pipeline 5, the first sub-pipeline 4 is provided with a first control valve 601, the second sub-pipeline 5 is provided with a first buffer tank 7 and a second control valve 602, the second sub-pipeline 5 is provided with two second control valves 602, the first buffer tank 7 is located between the two second control valves 602, the second sub-pipeline 5 is connected to the bottom of the second buffer tank 9, the first pressure relief pipeline 8 is connected to the top of the second buffer tank 9, the first pressure relief pipeline 8 is provided with a first pressure relief valve 1001, the first buffer tank 7 can be switched between an offline state and an online state by the two second control valves 602, so as to facilitate subsequent maintenance work, and when the internal pressure of a pipeline is too high, gas enters the first buffer tank 7 by opening the second control valve 602, so as to exert a buffering effect of the first buffer tank 7.
The first pressure relief line 8 is provided with a first check valve 1101, and the first check valve 1101 allows only BOG gas to enter the second buffer tank 9 from the first buffer tank 7.
A third control valve 603 is arranged on the first pressure release pipeline 8, and the on-off between the first buffer tank 7 and the second buffer tank 9 is controlled through the third control valve 603.
A second non-return valve 1102 is arranged in the return line 11, which second non-return valve 1102 only allows BOG gas from the second buffer tank 9 to enter the feed line 2.
A fourth control valve 604 is arranged on the return pipeline 11, and the fourth control valve 604 is used for controlling the connection and disconnection between the second buffer tank 9 and the input pipeline 2.
The connection of the return line 11 to the feed line 2 is between the first buffer tank 7 and the BOG compressor 1.
Be provided with manometer 13 on the input pipeline 2, through manometer 13 can be accurate learn the pressure in the input pipeline 2, BOG compressor 1's input end pressure promptly to realize the switching control of pipeline, so that whole pipe-line system's operation is more stable.
The utility model discloses a theory of operation does:
1. when the BOG compressor works normally, the first control valve 601 and the third control valve 603 are opened, the second control valve 602 and the fourth control valve 604 are closed, and BOG gas normally enters the BOG compressor for processing;
2. when the pressure in the input pipeline 2 exceeds a preset value, the second control valve 602 is opened, the first buffer tank 7 is directly communicated with the input pipeline 2, the pressure buffering of the BOG gas is realized, meanwhile, due to the entering of pressure inlet air, the pressure in the first buffer tank 7 is increased, so that the overhigh pressure at the input end of the BOG compressor 1 can be avoided, the BOG compressor 1 is in a good working state, when the pressure in the input pipeline 2 tends to be reduced to a normal level, the second control valve 602 is closed, and at this time, the first buffer tank 7 is in a relatively high-pressure state;
3. when the pressure in the input pipeline 2 is lower than the preset value, the second control valve 602 is opened, and due to the fact that the too-high-pressure BOG gas is introduced into the first buffer tank 7 before, the BOG gas in the first buffer tank 7 can enter the input pipeline 2 again under the action of pressure difference, the effect of pressure supplement is achieved, and stable work of the BOG compressor is achieved as well;
4. in a general situation, since the capacity of the first buffer tank 7 is large, when the input pipeline 2 is in a non-continuous high-pressure state, the increase amount of the internal BOG gas is not enough to open the first relief valve 1001, that is, only the first buffer tank 7 participates in the buffering operation in most cases, but when the input pipeline 2 is in a continuous high-pressure state, since the high-pressure BOG gas continuously enters the first buffer tank 7, the internal part of the first buffer tank reaches a saturated state, the first relief valve 1001 is opened by the pressure at this time, a part of the BOG gas enters the second buffer tank 9, since the volumes of the first buffer tank 7 and the second buffer tank 9 are carefully designed according to the actual situation, the situation that the second buffer tank 9 is filled is hardly generated, that is, the situation that the BOG gas is relieved through the second relief pipeline 12 is hardly generated, the waste of the BOG gas is avoided, so that when the pressure in the input pipeline 2 is lower than the preset value, the second control valve 602 is opened, the second buffer tank 7 is opened, or the fourth buffer tank 9 is flexibly controlled by the pressure stabilizing valve 604.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. The utility model provides a BOG pipeline structure, includes BOG compressor and the input pipeline and the output pipeline that are connected with the BOG compressor, the last parallel connection of input pipeline has first sub-pipeline and second sub-pipeline, is provided with first control valve on the first sub-pipeline, is provided with first buffer tank and second control valve on the second sub-pipeline, its characterized in that: the first buffer tank is connected with a second buffer tank through a first pressure relief pipeline, a first pressure relief valve is arranged on the first pressure relief pipeline, the second buffer tank is connected with the input pipeline through a return pipeline, the second buffer tank is connected with a second pressure relief pipeline, and a second pressure relief valve is arranged on the second pressure relief pipeline.
2. The BOG pipeline structure according to claim 1, wherein: and two second control valves are arranged on the second sub-pipeline, and the first buffer tank is positioned between the two second control valves.
3. The BOG pipeline structure according to claim 1, wherein: and the first pressure relief pipeline is provided with a first one-way valve.
4. The BOG pipeline structure according to claim 1, wherein: and a third control valve is arranged on the first pressure relief pipeline.
5. The BOG pipeline structure according to claim 1, wherein: and a second one-way valve is arranged on the return pipeline.
6. The BOG pipeline structure according to claim 1, wherein: and a fourth control valve is arranged on the return pipeline.
7. The BOG pipeline structure according to claim 1, wherein: and the joint of the return pipeline and the input pipeline is positioned between the first buffer tank and the BOG compressor.
8. The BOG pipeline structure according to claim 1, wherein: and a pressure gauge is arranged on the input pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220356284.8U CN217816156U (en) | 2022-02-22 | 2022-02-22 | BOG pipeline structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220356284.8U CN217816156U (en) | 2022-02-22 | 2022-02-22 | BOG pipeline structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217816156U true CN217816156U (en) | 2022-11-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220356284.8U Active CN217816156U (en) | 2022-02-22 | 2022-02-22 | BOG pipeline structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217816156U (en) |
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2022
- 2022-02-22 CN CN202220356284.8U patent/CN217816156U/en active Active
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