Oil recovery system

Abstract

The utility model provides an oil liquid recovery system which comprises a condenser, a gas-liquid separator and a waste gas temperature returning device, and a first inlet of the condenser is used for being communicated with one end of an oil gas conveying pipeline through a first pipeline; an inlet of the gas-liquid separator is communicated with a first outlet of the condenser through a second pipeline, and a second outlet of the gas-liquid separator is used for being communicated with a storage tank through a third pipeline; and an inlet of the waste gas temperature returning device is communicated with a first outlet of the gas-liquid separator through a fourth pipeline. By means of the condenser, the gas-liquid separator and the waste gas temperature returning device, oil gas exhaled by the storage tank is subjected to condensation and gas-liquid separation treatment, separated waste gas enters the waste gas temperature returning device from the third pipeline to be reheated, and then the waste gas is discharged outwards. And the oil flows back to the storage tank from the third pipeline so as to realize oil recovery. Therefore, environmental pollution can be avoided, volatilized oil gas can be recycled, economic loss is reduced, and the benefits of being green, low-carbon, energy-saving and environment-friendly are obtained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oil and gas storage technical field, specifically, relate to an oil recovery system. BACKGROUND

[0002] Generally, the tank top of organic matter liquid storage tank is provided with a breather valve, when the gas phase pressure in the tank is higher than the discharge constant pressure of the breather valve, the oil and gas in the tank is discharged through the breather valve. However, these oil and gas are directly discharged to the air without treatment, and volatilize into the air, so not only resources are wasted, but also environmental pollution is caused. SUMMARY

[0003] In order to make up for the above shortage, the utility model provides an oil recovery system, which aims at solving the problem that the oil and gas discharged by the existing organic matter liquid storage tank is directly discharged to the air without treatment.

[0004] The utility model is realized as follows:

[0005] An oil recovery system is used for oil recovery of a storage tank, comprising:

[0006] A condenser, a first inlet of the condenser is communicated with one end of an oil and gas conveying pipeline through a first pipeline;

[0007] A gas-liquid separator, an inlet of the gas-liquid separator is communicated with a first outlet of the condenser through a second pipeline, and a second outlet of the gas-liquid separator is communicated with an inlet of the storage tank through a third pipeline;

[0008] A waste gas recuperator, an inlet of the waste gas recuperator is communicated with a first outlet of the gas-liquid separator through a fourth pipeline.

[0009] Further, a second inlet of the condenser is communicated with one end of a liquid nitrogen pipeline through a fifth pipeline, and a liquid nitrogen regulating valve is arranged on the fifth pipeline.

[0010] Further, a liquid level transmitter is arranged in a liquid collecting cavity of the gas-liquid separator, and a first cut-off valve is arranged on the third pipeline.

[0011] Further, a single-breathing valve is arranged on the fourth pipeline.

[0012] Further, a pipeline flame arrester is arranged on the fourth pipeline, and the pipeline flame arrester is located between the waste gas recuperator and the single-breathing valve.

[0013] Further, an exhaust cylinder is arranged, and an inlet of the exhaust cylinder is communicated with an outlet of the waste gas recuperator through a sixth pipeline.

[0014] Further, a detection unit is arranged on the first pipeline and / or the second pipeline, and the detection unit comprises a first temperature transmitter and / or a first pressure transmitter.

[0015] Further, a nitrogen gas reheater is arranged, and an inlet of the nitrogen gas reheater is communicated with the second outlet of the condenser through a seventh pipeline, and an outlet of the nitrogen gas reheater is communicated with one end of a nitrogen gas pipeline through an eighth pipeline.

[0016] Further, a second cut-off valve is arranged on the eighth pipeline.

[0017] Further, a second temperature transmitter is arranged on the eighth pipeline, and the second temperature transmitter is arranged between the nitrogen gas reheater and the second cut-off valve.

[0018] Compared with the prior art, the oil liquid recovery system has the following beneficial effects: the oil gas emitted by the storage tank is subjected to condensation and gas-liquid separation treatment through the condenser, the gas-liquid separator and the waste gas reheater, the separated waste gas is reheated in the waste gas reheater from the fourth pipeline, and then the waste gas is discharged. The oil liquid is returned to the storage tank from the third pipeline, so that the oil liquid recovery is realized. Thus, the environmental pollution can be avoided, the oil liquid waste can be reduced, and the economic loss can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0020] Figure 1 is a perspective view of the oil liquid recovery system provided by the embodiments of the present application.

[0021] EXPLANATION OF REFERENCE NUMERALS

[0022] 1, condenser;

[0023] 2, gas-liquid separator; 21, liquid level transmitter;

[0024] 3, waste gas reheater;

[0025] 4, exhaust cylinder;

[0026] 5, nitrogen gas reheater;

[0027] 61, first pipe; 611, detection unit; 6111, first temperature transmitter; 6112, first pressure transmitter; 62, second pipe; 63, third pipe; 631, first shut-off valve; 64, fourth pipe; 641, single call valve; 642, pipe flame arrestor; 65, fifth pipe; 651, liquid nitrogen regulating valve; 66, sixth pipe; 67, seventh pipe; 671, second temperature transmitter; 68, eighth pipe; 681, second pressure transmitter; 682, second shut-off valve. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified.

[0033] Please refer to Figure 1 As shown in the figure, the utility model provides a kind of oil recovery system, for tank oil recovery, including condenser 1, gas-liquid separator 2 and waste gas reheater 3, the first inlet of condenser 1 is used for being communicated with one end of oil gas conveying pipeline by first pipeline 61;The inlet of gas-liquid separator 2 is communicated with the first outlet of condenser 1 by second pipeline 62, and the second outlet of gas-liquid separator 2 is used for being communicated with the inlet of tank by third pipeline 63;The inlet of waste gas reheater 3 is communicated with the first outlet of gas-liquid separator 2 by fourth pipeline 64.

[0034] In practical application, the other end of oil gas conveying pipeline is communicated with the outlet of breather valve. The oil gas discharged from breather valve enters condenser 1 to condense after first pipeline 61, then enters gas-liquid separator 2 from second pipeline 62, and the oil gas is handled by gas-liquid separation by gas-liquid separator 2. Because the temperature of waste gas after condensation is low, the waste gas after separation enters waste gas reheater 3 for rewarming from fourth pipeline 64, and then discharges waste gas outward. And oil liquid is returned to tank from third pipeline 63 to realize oil recovery.

[0035] Optionally, the refrigeration temperature of condenser 1 can be-140℃~-100℃.

[0036] In a possible embodiment, the surface of condenser 1 and / or gas-liquid separator 2 is provided with cold insulation layer.

[0037] For example, the cold insulation layer can be polyisocyanurate foam plastic or the like.

[0038] In practical application, by cold insulation layer, condenser 1 and / or gas-liquid separator 2 can be added with a layer of isolation from the outside, so as to avoid the loss of cold quantity of condenser 1 and oil liquid volatilization.

[0039] Please refer to Figure 1 As shown in the figure, in a possible embodiment, the second inlet of condenser 1 is used for being communicated with one end of liquid nitrogen pipeline by fifth pipeline 65, and liquid nitrogen regulating valve 651 is arranged on fifth pipeline 65.

[0040] In actual application, the other end of the liquid nitrogen pipeline can be connected to a liquid nitrogen storage tank or the like. When the liquid nitrogen in the condenser 1 is insufficient, the liquid nitrogen regulating valve 651 can be opened to allow the liquid nitrogen storage tank to supply liquid nitrogen to the condenser 1 through the liquid nitrogen pipeline and the fourth pipeline 64, so as to ensure that the condenser 1 maintains a corresponding refrigeration temperature.

[0041] Referring to Figure 1 In a possible embodiment, a liquid level transmitter 21 is arranged in the liquid collection chamber of the gas-liquid separator 2, and a first shut-off valve 631 is arranged on the third pipeline 63.

[0042] For example, the first shut-off valve 631 can be a pneumatic shut-off valve or the like.

[0043] In actual application, the liquid level transmitter 21 detects the liquid level of the oil in the liquid collection chamber. When the liquid level of the oil reaches a preset threshold, the first shut-off valve 631 is opened, so that the oil flows back to the storage tank from the third pipeline 63, thereby realizing oil recovery.

[0044] Referring to Figure 1 In a possible embodiment, a single call valve 641 is arranged on the fourth pipeline 64.

[0045] In actual application, when the storage tank is fed or the temperature rises, the oil gas is condensed in the condenser 1 and separated in the gas-liquid separator 2. When the pressure of the waste gas generated by the gas-liquid separator 2 reaches a certain value, the single call valve 641 can be opened, thereby discharging the waste gas.

[0046] The single call valve 641 is automatically opened when the pressure in the fourth pipeline 64 reaches a certain value, so as to ensure that the oil gas is automatically introduced into the system for condensation when the storage tank is fed or the pressure rises to a certain value.

[0047] Referring to Figure 1 In a possible embodiment, a pipeline flame arrester 642 is arranged on the fourth pipeline 64, and the pipeline flame arrester 642 is located between the waste gas reheater 3 and the single call valve 641.

[0048] In actual application, the pipeline flame arrester 642 can prevent external flames from entering the fourth pipeline 64, thereby preventing the flames from spreading between the pipelines.

[0049] Referring to Figure 1 In a possible embodiment, the oil recovery system includes an exhaust cylinder 4, and an inlet of the exhaust cylinder 4 is in communication with an outlet of the waste gas reheater 3 through a sixth pipeline 66.

[0050] In actual application, the waste gas can be efficiently and safely discharged into the atmosphere through the exhaust cylinder 4, thereby ensuring smooth operation of the system.

[0051] Referring to Figure 1As shown, in a possible embodiment, the first pipeline 61 and / or the second pipeline 62 is provided with a detection unit 611, which includes a first temperature transmitter 6111 and / or a first pressure transmitter 6112.

[0052] In actual application, the first temperature transmitter 6111 detects the first temperature of the oil gas in the pipeline connected therewith, so as to facilitate adjustment of the refrigeration temperature of the condenser 1. The first pressure transmitter 6112 detects the first pressure of the pipeline connected therewith, and when the second pressure reaches a first preset pressure threshold, an alarm can be given to exclude the system overpressure failure.

[0053] As shown in FIG. 1, the oil liquid recovery system includes a condenser 1, a nitrogen gas pipeline, and a nitrogen gas heater 5. Figure 1 As shown, in a possible embodiment, the oil liquid recovery system includes the nitrogen gas heater 5, an inlet of the nitrogen gas heater 5 is communicated with the second outlet of the condenser 1 through a seventh pipeline 67, and an outlet of the nitrogen gas heater 5 is communicated with one end of the nitrogen gas pipeline through an eighth pipeline 68.

[0054] In actual application, the other end of the nitrogen gas pipeline can be connected with a nitrogen tank. The nitrogen gas generated by the condenser 1 during condensation can enter the nitrogen gas heater 5 from the seventh pipeline 67, and after the nitrogen gas is heated in the nitrogen gas heater 5, the nitrogen gas enters the nitrogen tank through the eighth pipeline 68 and the nitrogen gas pipeline, so as to realize nitrogen gas recovery and reuse.

[0055] As shown in FIG. 1, the oil liquid recovery system includes a condenser 1, a nitrogen gas pipeline, and a nitrogen gas heater 5. Figure 1 As shown, in a possible embodiment, the eighth pipeline 68 is provided with a second pressure transmitter 681 and a second cut-off valve 682, and the second pressure transmitter 681 is located between the nitrogen gas heater 5 and the second cut-off valve 682.

[0056] For example, the second cut-off valve 682 can be a pneumatic cut-off valve or the like.

[0057] In actual application, the second pressure transmitter 681 detects the second pressure of the eighth pipeline 68, and when the second pressure reaches a second preset pressure threshold, the second cut-off valve 682 is opened to enable the nitrogen gas to enter the nitrogen tank through the eighth pipeline 68 and the nitrogen gas pipeline.

[0058] As shown in FIG. 1, the oil liquid recovery system includes a condenser 1, a nitrogen gas pipeline, and a nitrogen gas heater 5. Figure 1 As shown, in a possible embodiment, the seventh pipeline 67 is provided with a second temperature transmitter 671.

[0059] In actual application, the second temperature transmitter 671 detects the second temperature of the nitrogen gas in the seventh pipeline 67, so that the nitrogen gas heater 5 can adjust the heating temperature of the nitrogen gas according to the second temperature, thereby enabling the nitrogen gas heater 5 to save energy.

[0060] In a possible embodiment, the oil liquid recovery system can be integrated on a pry block of the storage tank.

[0061] In practical application, thus not only can more effectively utilize space, reduce the occupation of space, but also can directly move through hoisting equipment, need not reassemble, thereby reach the purpose of simple installation.

[0062] The preferred embodiments of the present application have been described above with the preferred embodiments, but are not intended to limit the present application, and for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil recovery system for use in tank oil recovery, characterized in that Comprise: A condenser (1), a first inlet of the condenser (1) is communicated with one end of an oil gas pipeline through a first pipeline (61); A gas-liquid separator (2), an inlet of the gas-liquid separator (2) is communicated with a first outlet of the condenser (1) through a second pipeline (62), a second outlet of the gas-liquid separator (2) is communicated with an inlet of the storage tank through a third pipeline (63); A waste gas heater (3), an inlet of the waste gas heater (3) is communicated with a first outlet of the gas-liquid separator (2) through a fourth pipeline (64).

2. The oil recovery system of claim 1, wherein, A second inlet of the condenser (1) is communicated with one end of a liquid nitrogen pipeline through a fifth pipeline (65), a liquid nitrogen regulating valve (651) is arranged on the fifth pipeline (65).

3. The oil recovery system of claim 1, wherein, A liquid level transmitter (21) is arranged in a liquid collecting cavity of the gas-liquid separator (2), a first cut-off valve (631) is arranged on the third pipeline (63).

4. The oil recovery system of claim 1, wherein, A single call valve (641) is arranged on the fourth pipeline (64).

5. The oil recovery system of claim 4, wherein, A pipeline flame arrester (642) is arranged on the fourth pipeline (64), and the pipeline flame arrester (642) is located between the waste gas heater (3) and the single call valve (641).

6. The oil recovery system of claim 1, wherein, An exhaust cylinder (4) is arranged, an inlet of the exhaust cylinder (4) is communicated with an outlet of the waste gas heater (3) through a sixth pipeline (66).

7. The oil recovery system according to any one of claims 1 to 6, wherein A detection unit (611) is arranged on the first pipeline (61) and / or the second pipeline (62), the detection unit (611) comprises a first temperature transmitter (6111) and / or a first pressure transmitter (6112).

8. The oil recovery system according to any one of claims 1 to 6, wherein A nitrogen gas heater (5) is arranged, an inlet of the nitrogen gas heater (5) is communicated with a second outlet of the condenser (1) through a seventh pipeline (67), an outlet of the nitrogen gas heater (5) is communicated with one end of a nitrogen gas pipeline through an eighth pipeline (68).

9. The oil recovery system of claim 8, wherein, A second cut-off valve (682) is arranged on the eighth pipeline (68).

10. The oil recovery system of claim 9, wherein, A second temperature transmitter (671) is arranged on the eighth pipeline (68), and the second temperature transmitter (671) is located between the nitrogen gas heater (5) and the second cut-off valve (682).

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