Liquefied gas collecting device of reciprocating piston type compressor

Abstract

The utility model discloses a liquefied gas collecting device of a reciprocating piston type compressor, which comprises a nitrogen pipeline, nitrogen is introduced into the nitrogen pipeline, one end of the nitrogen pipeline is communicated with a flare gas pipeline, and a pressure gauge, a first Y-shaped filter, a first stop valve, a Venturi tube and a second stop valve are sequentially arranged on the nitrogen pipeline. An inlet of the Venturi tube is communicated with a liquefied gas leakage structure. The liquefied gas collecting device of the reciprocating piston type compressor is simple in structure and convenient to use, nitrogen serves as a vacuum generating gas source, leaked gas is led to a negative pressure opening of the Venturi tube through a pipeline, then an outlet of the Venturi tube is led to a flare gas pipeline, and finally the leaked gas is discharged to a flare to be incinerated, so that fire disasters caused by liquefied gas leakage are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of liquefied gas collecting devices, in particular to a liquefied gas collecting device for a reciprocating piston compressor. Background Art

[0002] The existing storage and transportation liquefied gas unloading compressor is a reciprocating piston compressor, and its piston rod main seal has a certain degree of liquefied gas leakage. The existing equipment uses a pipeline to discharge to a high place. Since the leaking gas is liquefied gas, the on-site discharge has a strong odor and there are great safety hazards. Once sparks or static electricity appear in the surrounding area, it is very easy to cause a fire or even an explosion, posing a threat to the lives of employees and causing significant property losses to the company.

[0003] Based on the above situation, the utility model proposes a liquefied gas collecting device for a reciprocating piston compressor, which can effectively solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a liquefied gas collection device for a reciprocating piston compressor. The liquefied gas collection device for a reciprocating piston compressor of the utility model has a simple structure and is easy to use. It uses nitrogen as a vacuum generating gas source, leads the leaked gas to the negative pressure port of the venturi tube through a pipeline, then leads the outlet of the venturi tube to the flare gas pipeline, and finally discharges it to the flare for incineration, thereby avoiding fire caused by liquefied gas leakage.

[0005] The utility model is realized by the following technical solutions:

[0006] A liquefied gas collection device for a reciprocating piston compressor comprises a nitrogen pipeline, wherein nitrogen is introduced into the nitrogen pipeline, one end of the nitrogen pipeline is connected to a flare gas pipeline, a pressure gauge, a first Y-type filter, a first stop valve, a venturi tube and a second stop valve are sequentially arranged on the nitrogen pipeline, and a leaking liquefied gas structure is connected to the inlet of the venturi tube.

[0007] The purpose of the utility model is to provide a liquefied gas collection device for a reciprocating piston compressor. The liquefied gas collection device for a reciprocating piston compressor of the utility model has a simple structure and is easy to use. It uses nitrogen as a vacuum generating gas source, leads the leaked gas to the negative pressure port of the venturi tube through a pipeline, then leads the outlet of the venturi tube to the flare gas pipeline, and finally discharges it to the flare for incineration, thereby avoiding fire caused by liquefied gas leakage.

[0008] Preferably, the leaking liquefied gas structure includes a compressor, a third stop valve, a vacuum gauge, a second Y-type filter and a fourth stop valve which are sequentially connected through a pipeline, and the fourth stop valve is connected to the inlet of the venturi tube through a pipeline.

[0009] Preferably, the number of the leaking liquefied gas structures is three groups.

[0010] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0011] 1. Use nitrogen as the vacuum generating gas source, lead the leaking gas to the negative pressure port of the Venturi tube through the pipeline, then lead the outlet of the Venturi tube to the flare gas pipeline, and finally discharge it to the flare for incineration, so as to avoid fire caused by liquefied gas leakage;

[0012] 2. The materials used in this utility model are all common materials, and the construction and installation are simple and convenient, and the cost is also low. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0015] Embodiment 1:

[0016] like Figure 1 As shown, the utility model provides a liquefied gas collection device for a reciprocating piston compressor, comprising a nitrogen pipeline 1, nitrogen is introduced into the nitrogen pipeline 1, one end of the nitrogen pipeline 1 is connected to a flare gas pipeline, a pressure gauge 11, a first Y-type filter 12, a first stop valve 13, a venturi tube 14 and a second stop valve 15 are sequentially arranged on the nitrogen pipeline 1, and a leaking liquefied gas structure is connected to the inlet of the venturi tube 14.

[0017] Embodiment 2:

[0018] like Figure 1 As shown, the utility model provides a liquefied gas collection device for a reciprocating piston compressor, comprising a nitrogen pipeline 1, nitrogen is introduced into the nitrogen pipeline 1, one end of the nitrogen pipeline 1 is connected to a flare gas pipeline, a pressure gauge 11, a first Y-type filter 12, a first stop valve 13, a venturi tube 14 and a second stop valve 15 are sequentially arranged on the nitrogen pipeline 1, and a leaking liquefied gas structure is connected to the inlet of the venturi tube 14.

[0019] The leaking liquefied gas structure includes a compressor 21, a third stop valve 22, a vacuum gauge 23, a second Y-type filter 24 and a fourth stop valve 25 which are sequentially connected through a pipeline. The fourth stop valve 25 is connected to the inlet of the venturi tube 14 through a pipeline.

[0020] Because there is a slight positive pressure in the flare pipeline, and the pressure will be higher during maintenance or fault conditions, the leaked gas from compressor 21 cannot be directly connected to the flare pipeline network. Otherwise, the liquefied gas in the flare pipeline network will flow back to compressor 21 due to the high pressure of the pipeline network, making it impossible for the leaked gas from compressor 21 to be discharged normally.

[0021] Further, in another embodiment, the number of the leaking liquefied gas structures is three groups.

[0022] The working principle of one embodiment of the utility model is as follows:

[0023] A liquefied gas collection device for a reciprocating piston compressor uses nitrogen as a vacuum generating gas source, leads the leaked gas to the negative pressure port of the venturi tube 14 through a pipeline, then leads the outlet of the venturi tube 14 to the flare gas pipeline, and finally discharges it to the flare for incineration. Since the nitrogen pressure is 7-9 bar, the flare pipe network pressure is much lower than the nitrogen pressure, and will not cause backflow.

[0024] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the liquefied gas collecting device for the reciprocating piston compressor of the present invention, and can produce the positive effects recorded in the present invention.

[0025] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0026] Unless otherwise specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A liquefied gas collection device for a reciprocating piston compressor, characterized in that: It comprises a nitrogen pipeline, nitrogen is introduced into the nitrogen pipeline, one end of the nitrogen pipeline is connected with the flare gas pipeline, a pressure gauge, a first Y-type filter, a first stop valve, a venturi tube and a second stop valve are sequentially arranged on the nitrogen pipeline, and a leakage liquefied gas structure is connected to the inlet of the venturi tube.

2. The liquefied gas collecting device for a reciprocating piston compressor according to claim 1, characterized in that: The leaking liquefied gas structure comprises a compressor, a third stop valve, a vacuum gauge, a second Y-type filter and a fourth stop valve which are sequentially connected through a pipeline, and the fourth stop valve is connected to the inlet of the venturi tube through a pipeline.

3. The liquefied gas collecting device for a reciprocating piston compressor according to claim 1, characterized in that: The number of the leaking liquefied gas structures is three.

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