Liquefied hydrocarbon material recovery system

Abstract

The utility model provides a liquefied hydrocarbon material recovery system which comprises a recovery device and a pipeline, and the pipeline is connected with the recovery device. The pipeline comprises an inlet pipeline connected with the spherical tank, an outlet pipeline connected with the low-temperature tank and a discharge pipeline connected with the discharge torch. The system can realize complete recovery of liquefied hydrocarbon materials, so that economic benefits are increased, and resource waste is reduced. And through operation of the hand valve and real-time monitoring, the operation process is simplified, the time for manually connecting and disassembling the pipe is shortened, and the operation efficiency is improved. The pipeline is provided with the pressure gauge and the first combustible gas detector, and the pipeline pressure and the combustible gas value are monitored in real time, so that the recovery progress is accurately judged, and the problem that recovery is stopped too early or too late is avoided. The recovery device is provided with a second combustible gas detector, whether the pipeline leaks or not in the recovery process is monitored, it is ensured that the operation process is safe and reliable, and the possibility of accidents is reduced.

Description

Technical Field

[0001] The utility model relates to a recovery system, in particular to a liquefied hydrocarbon material recovery system, belonging to the technical field of chemical production. Background Art

[0002] Most liquefied hydrocarbon substances are fire and explosion hazards. They are easy to form explosive mixtures with air at normal temperature and pressure, and are easy to accumulate in low-lying areas after leakage. Therefore, before inspecting the liquefied hydrocarbon spherical tank, the liquefied hydrocarbon materials in the spherical tank need to be treated. There are two general treatment methods: the first method is to treat it by flaring. This treatment method has huge economic losses, and incomplete combustion can easily lead to environmental pollution; the second method is to transport it by pipeline and connect it to a cryogenic tank that stores the same type for recycling. During the recycling process, since the pressure of the spherical tank is much greater than that of the cryogenic tank, the liquefied hydrocarbon can be first recovered into the cryogenic tank by self-pressure, and then discharged to the flare by nitrogen replacement after the pressure is slightly higher than that of the cryogenic tank.

[0003] However, there are several difficulties in recycling. First, it is time-consuming and laborious to frequently switch the valves of the recovery pipeline and the flare valves. Second, the pipeline is temporarily arranged, and leakage is prone to occur at the interface. Third, it is difficult to accurately recover all the liquefied hydrocarbon gas phase during the recovery process. Utility Model Content

[0004] Based on the above background, the purpose of the utility model is to provide a liquefied hydrocarbon material recovery system that can quickly and accurately recover all liquid and gas phases in a liquefied hydrocarbon spherical tank, clearly define the recovery end time, and at the same time simplify the operation and reduce the time for manual pipe connection and removal, thereby solving the problems described in the background technology.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0006] A liquefied hydrocarbon material recovery system comprises a recovery device and a pipeline, wherein the pipeline is connected to the recovery device.

[0007] The pipeline comprises an inlet pipeline connected to the spherical tank, an outlet pipeline connected to the low-temperature tank and a discharge pipeline connected to the flare discharge torch, and the inlet pipeline, the outlet pipeline and the discharge pipeline are communicated with each other.

[0008] The inlet pipeline is provided with an inlet hand valve, and the inlet hand valve is communicated with the inlet pipeline.

[0009] The outlet pipeline is provided with an outlet hand valve, and the outlet hand valve is communicated with the outlet pipeline.

[0010] The discharge pipeline is provided with a discharge hand valve, and the discharge hand valve is communicated with the discharge pipeline.

[0011] The pipeline is provided with a pressure gauge and a first combustible gas detector, and both the pressure gauge and the first combustible gas detector are connected to the pipeline.

[0012] A second combustible gas detector is arranged inside the recovery device, and the second combustible gas detector is connected to the recovery device.

[0013] The recovery device is connected to the spherical tank, cryogenic tank and flare torch through the inlet pipeline, outlet pipeline and discharge pipeline of the pipeline, and monitors the pipeline pressure and combustible gas value in real time through the pressure gauge and the first combustible gas detector to judge the progress of the recovery work.

[0014] Open the inlet and outlet manual valves to allow the liquefied hydrocarbon material to enter the recovery device, and observe the combustible gas value of the first combustible gas detector. When the value is close to 0, it indicates that the recovery is completed.

[0015] When the recovery is confirmed to be complete, close the inlet manual valve and open the discharge manual valve of the discharge pipeline to allow the replaced mixed gas to be discharged from the discharge flare to ensure safety.

[0016] When all liquefied hydrocarbon materials have been successfully recovered and flared, close the discharge manual valve and prepare for cleaning and maintenance of the recovery unit.

[0017] During the entire operation process, the second combustible gas detector in the recovery device can monitor the pipeline in real time to see if there is any leakage, thereby ensuring safe operation.

[0018] Preferably, the pipeline also includes a sampling line, the two ends of which are respectively connected to the inlet pipeline and the outlet pipeline, the sampling line is provided with a sampling valve and a sampling interface, the sampling valve and the sampling interface are both connected to the sampling pipeline, and the sampling interface is connected to a recovery device.

[0019] Through the sampling valve and sampling interface on the sampling pipeline, operators can easily obtain liquefied hydrocarbon material samples and send them to the laboratory for analysis.

[0020] Preferably, the recovery device is connected to the pipeline via a flange.

[0021] The flange connection ensures a secure connection between the recovery unit and the pipeline.

[0022] Preferably, seals are provided at the connection parts between the recovery device and the inlet pipeline, the outlet pipeline, the discharge pipeline and the sampling interface.

[0023] The seal can effectively prevent the leakage of liquefied hydrocarbon materials during the recovery process.

[0024] Preferably, the recovery device comprises a box body and a plurality of supporting legs, wherein the plurality of supporting legs are located at the bottom of the box body, and the supporting legs are connected to the box body.

[0025] Compared with the prior art, the utility model has the following advantages:

[0026] 1. Complete recovery of materials: The system can achieve complete recovery of liquefied hydrocarbon materials, thereby increasing economic benefits and reducing resource waste.

[0027] 2. Easy operation: Through the operation of the hand valve and real-time monitoring, the operation process is simplified, the time for manual pipe connection and removal is reduced, and the operation efficiency is improved.

[0028] 3. Accurately judge the recovery progress: The pipeline is equipped with a pressure gauge and the first combustible gas detector to monitor the pipeline pressure and combustible gas value in real time, so as to accurately judge the recovery progress and avoid the problem of stopping recovery too early or too late.

[0029] 4. Safe and reliable: The recovery device is equipped with a second combustible gas detector to monitor whether there is leakage in the pipeline during the recovery process, ensure the safety and reliability of the operation process, and reduce the possibility of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the liquefied hydrocarbon material recovery system of the utility model.

[0032] In the figure: 1. Recovery device; 101. Box body; 102. Support leg; 2. Pipeline; 201. Inlet pipeline; 202. Outlet pipeline; 203. Discharge pipeline; 204. Sampling pipeline; 3. Inlet manual valve; 4. Outlet manual valve; 5. Discharge manual valve; 6. Pressure gauge; 7. First combustible gas detector; 8. Second combustible gas detector; 9. Sampling valve; 10. Sampling interface. DETAILED DESCRIPTION

[0033] The technical solution of the utility model is further described in detail below through specific embodiments and in combination with the accompanying drawings. It should be understood that the implementation of the utility model is not limited to the following embodiments, and any form of modification and / or change made to the utility model will fall within the protection scope of the utility model.

[0034] In the present invention, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the field. The methods in the following embodiments, unless otherwise specified, are conventional methods in the field. The components or equipment in the following embodiments, unless otherwise specified, are universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0035] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the following detailed description, for ease of explanation, many specific details are described to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may also be implemented by those skilled in the art without these specific details.

[0036] like Figure 1 As shown, a liquefied hydrocarbon material recovery system includes a recovery device 1 and a pipeline 2. The recovery device 1 includes a box body 101 and a plurality of support legs 102, wherein the plurality of support legs 102 are located at the bottom of the box body 101, and the support legs 102 are connected to the box body 101. The recovery device 1 is connected to the pipeline 2 via a flange. The flange connection ensures a stable connection between the recovery device 1 and the pipeline 2.

[0037] The pipeline 2 includes an inlet pipeline 201 connected to the spherical tank, an outlet pipeline 202 connected to the cryogenic tank, and a discharge pipeline 203 connected to the flare discharger. The inlet pipeline 201, the outlet pipeline 202 and the discharge pipeline 203 are connected.

[0038] The recovery device 1 is provided with seals at the connection parts with the inlet pipeline 201, the outlet pipeline 202, the discharge pipeline 203 and the sampling interface 10. The seals can effectively prevent the liquefied hydrocarbon material from leaking during the recovery process.

[0039] The inlet pipeline 201 is provided with an inlet manual valve 3 which is connected to the inlet pipeline 201 , the outlet pipeline 202 is provided with an outlet manual valve 4 which is connected to the outlet pipeline 202 , and the discharge pipeline 203 is provided with a discharge manual valve 5 which is connected to the discharge pipeline 203 .

[0040] The pipeline 2 is provided with a pressure gauge 6 and a first combustible gas detector 7 , and both the pressure gauge 6 and the first combustible gas detector 7 are connected to the pipeline 2 .

[0041] The recovery device 1 is connected to the spherical tank, the cryogenic tank and the exhaust torch through the inlet pipeline 201, the outlet pipeline 202 and the discharge pipeline 203 of the pipeline 2, and the pressure and the combustible gas value of the pipeline 2 are monitored in real time through the pressure gauge 6 and the first combustible gas detector 7 to judge the progress of the recovery work.

[0042] The pressure gauge 6 can be replaced by a sensor for real-time monitoring of the material flow rate changes during the recovery process, so as to accurately determine the recovery progress. The pipeline 2 can also be provided with a flow sensor for detecting the recovery flow rate.

[0043] Open the inlet manual valve 3 and the outlet manual valve 4 to allow the liquefied hydrocarbon material to enter the recovery device 1, observe the combustible gas value of the first combustible gas detector 7, and when the value is close to 0 during the process of compressing the remaining liquefied hydrocarbon gas into the cryogenic tank by nitrogen replacement, it indicates that the recovery is completed.

[0044] When it is confirmed that the recovery is completed, close the inlet manual valve 3, open the discharge manual valve 5 of the discharge pipeline 203, and discharge the replaced mixed gas through the discharge torch to ensure safety.

[0045] A second combustible gas detector 8 is arranged inside the recovery device 1 , and the second combustible gas detector 8 is connected to the recovery device 1 .

[0046] During the entire operation process, the second combustible gas detector 8 in the recovery device 1 can monitor in real time whether there is any leakage in the pipeline 2, thereby ensuring safe operation.

[0047] The first combustible gas detector 7 and the second combustible gas detector 8 can be replaced with sensors for detecting various gas components, such as oxygen, hydrogen sulfide, combustible gas, etc.

[0048] When all the liquefied hydrocarbon materials are successfully recovered and discharged to the flare, the discharge manual valve 5 is closed, and then the recovery device 1 can be prepared for cleaning and maintenance.

[0049] The pipeline 2 also includes a sampling pipeline 204, the two ends of which are respectively connected to the inlet pipeline 201 and the outlet pipeline 202, and the sampling pipeline 204 is provided with a sampling valve 9 and a sampling interface 10, both of which are connected to the sampling pipeline 204, and the sampling interface 10 is connected to the recovery device 1. Through the sampling valve 9 and the sampling interface 10 on the sampling pipeline 204, the operator can easily obtain the liquefied hydrocarbon material sample and send it to the laboratory for analysis.

[0050] Among them, the inlet manual valve 3, the outlet manual valve 4, the discharge manual valve 5 and the sampling valve 9 are automatically controlled to reduce the possibility of manual operation errors and improve the accuracy and stability of the operation.

[0051] The operating steps of a liquefied hydrocarbon material recovery system of the utility model are:

[0052] First, the recovery device 1 is connected to the spherical tank, the cryogenic tank and the flare through the inlet pipeline 201, the outlet pipeline 202 and the discharge pipeline 203 of the pipeline 2, and the pressure gauge 6 and the first combustible gas detector 7 are installed on the pipeline 2 to monitor the pressure and combustible gas value of the pipeline 2 during recovery in real time to judge the progress of the recovery work.

[0053] After preparation, open the inlet hand valve 3 and the outlet hand valve 4, and the liquefied hydrocarbon material starts from the spherical tank, reaches the recovery device 1 through the path of pipeline 2, and finally enters the low-temperature tank. During this period, observe the combustible gas value of the first combustible gas detector 7. When the value is close to 0, it means that the recovery is completed.

[0054] When it is confirmed that the recovery of the liquefied hydrocarbon material is completed, the inlet manual valve 3 is closed, and the discharge manual valve 5 of the discharge pipeline 203 is opened to discharge the replacement mixed gas therein through the discharge flare.

[0055] When all liquefied hydrocarbon materials are successfully recovered and the displaced mixed gas is discharged to the flare, the discharge manual valve 5 is closed, and then the recovery device 1 is cleaned and maintained.

[0056] Finally, establish complete operation records and safety records, recording the details and results of each operation for future traceability and improvement.

[0057] During the entire operation process, the second combustible gas detector 8 in the recovery device 1 monitors the leakage of the pipeline 2 in real time, thereby ensuring the safety of the operation.

[0058] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A liquefied hydrocarbon material recovery system, characterized in that: The liquefied hydrocarbon material recovery system comprises a recovery device (1) and a pipeline (2), wherein the pipeline (2) is connected to the recovery device (1); The pipeline (2) comprises an inlet pipeline (201) connected to the spherical tank, an outlet pipeline (202) connected to the cryogenic tank, and a discharge pipeline (203) connected to the flare discharger, wherein the inlet pipeline (201), the outlet pipeline (202) and the discharge pipeline (203) are in communication with each other; The inlet pipeline (201) is provided with an inlet hand valve (3), and the inlet hand valve (3) is in communication with the inlet pipeline (201); The outlet pipeline (202) is provided with an outlet hand valve (4), and the outlet hand valve (4) is in communication with the outlet pipeline (202); The discharge pipeline (203) is provided with a discharge hand valve (5), and the discharge hand valve (5) is in communication with the discharge pipeline (203); The pipeline (2) is provided with a pressure gauge (6) and a first combustible gas detector (7), and the pressure gauge (6) and the first combustible gas detector (7) are both connected to the pipeline (2); A second combustible gas detector (8) is arranged inside the recovery device (1), and the second combustible gas detector (8) is connected to the recovery device (1).

2. The liquefied hydrocarbon material recovery system according to claim 1, characterized in that: The pipeline (2) further comprises a sampling pipeline (204), the two ends of which are respectively connected to the inlet pipeline (201) and the outlet pipeline (202), the sampling pipeline (204) is provided with a sampling valve (9) and a sampling interface (10), the sampling valve (9) and the sampling interface (10) are both connected to the sampling pipeline (204), and the sampling interface (10) is connected to the recovery device (1).

3. The liquefied hydrocarbon material recovery system according to claim 2, characterized in that: The recovery device (1) is connected to the pipeline (2) via a flange.

4. The liquefied hydrocarbon material recovery system according to claim 3, characterized in that: The recovery device (1) is provided with sealing elements at the connection locations with the inlet pipeline (201), the outlet pipeline (202), the discharge pipeline (203) and the sampling interface (10).

5. The liquefied hydrocarbon material recovery system according to claim 4, characterized in that: The recovery device (1) comprises a box body (101) and a plurality of support legs (102), wherein the plurality of support legs (102) are located at the bottom of the box body (101), and the support legs (102) are connected to the box body (101).

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