Safe replacement device for compressor inlet parallel pipelines

Abstract

The utility model belongs to the technical field of safety of chemical equipment, and relates to a safety replacement device for compressor inlet parallel pipelines, which comprises a main gas inlet pipeline, a replacement gas supply component, an exhaust component and at least two auxiliary gas inlet pipelines, the main air inlet pipeline is connected with an inlet of the compressor; the replacement gas supply assembly is connected with the main gas inlet pipeline; the at least two auxiliary air inlet pipelines are connected with the main air inlet pipeline, and exhaust assemblies are connected to the auxiliary air inlet pipelines; the replacement gas supply assembly is connected to the main gas inlet pipeline, the exhaust assemblies are connected to the auxiliary gas inlet pipelines connected in parallel, in the maintenance process of the auxiliary gas inlet pipelines, replacement gas is injected into the main gas inlet pipeline through the replacement gas supply assembly and then enters the auxiliary gas inlet pipelines, and in the process, the replacement gas is injected into the main gas inlet pipeline through the exhaust assemblies. The air in the main air inlet pipeline and the auxiliary air inlet pipeline is replaced by the replacement gas, the replaced air is exhausted from the exhaust assembly, the air is prevented from being mixed with combustible gas in the compressor, and then safety accidents such as fire disasters and explosions are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment safety, and particularly relates to a safety replacement device for a parallel pipeline at the inlet of a compressor. Background Technique

[0002] The parallel pipeline at the inlet of a compressor is a common structure in chemical production plants, and is used to send multiple gases from different sources in parallel into the compressor for pressurization; during normal operation, the parallel gases enter the compressor simultaneously through the parallel pipeline, and after being pressurized by the compressor, are sent to the fuel gas pipeline network for subsequent combustion, power generation or as an energy supply for other technological processes.

[0003] During the long-term operation process, the parallel pipeline at the inlet of the compressor may fail due to various reasons, such as corrosion, blockage or leakage, etc. At present, to ensure the safety of maintenance, the method of shutting down for maintenance and isolating the relevant pipelines is usually adopted to maintain the parallel pipeline to ensure the normal operation of the production line.

[0004] However, during the maintenance process of the parallel pipeline, air will inevitably enter the inside of the parallel pipeline. After the air enters the inner cavity of the compressor and mixes with the combustible gas inside the compressor, it is extremely easy to cause safety accidents such as fire and explosion. Content of the Utility Model

[0005] In order to solve the technical problem that air will inevitably enter the inside of the parallel pipeline during maintenance in the background technique, and it is extremely easy to cause safety accidents after the air enters the inner cavity of the compressor and mixes with the combustible gas inside the compressor, the utility model provides a safety replacement device for a parallel pipeline at the inlet of a compressor.

[0006] For the safety replacement device of the parallel pipeline at the inlet of the compressor of the utility model, a replacement gas supply component is connected to the main inlet pipeline, and exhaust components are connected to each of the parallel sub-inlet pipelines. During the maintenance process of the sub-inlet pipeline, the replacement gas is injected into the main inlet pipeline by the replacement gas supply component, and then enters the sub-inlet pipeline. During this process, the replacement gas replaces the air in the main inlet pipeline and the sub-inlet pipeline, and the replaced air is discharged from the exhaust component, avoiding the mixing of air with the combustible gas inside the compressor, and thus avoiding safety accidents such as fire and explosion.

[0007] To solve the above technical problems, the utility model provides the following technical solutions:

[0008] A safety replacement device for a parallel pipeline at the inlet of a compressor, comprising a main inlet pipeline, a replacement gas supply assembly, an exhaust assembly and at least two sub-inlet pipelines; the main inlet pipeline is connected to the compressor inlet; the replacement gas supply assembly is connected to the main inlet pipeline; at least two of the sub-inlet pipelines are all connected to the main inlet pipeline, and an exhaust assembly is connected to the sub-inlet pipeline; the replacement gas supply assembly is used to supply replacement gas to the main inlet pipeline, and the exhaust assembly is used to discharge the air replaced from the main inlet pipeline and at least two sub-inlet pipelines during the replacement process.

[0009] In a specific feasible embodiment, the replacement gas supply assembly includes a gas supply device, a gas supply pipeline and a gas supply regulating member; the gas supply device is connected to the gas supply pipeline; the gas supply pipeline is communicated with the main inlet pipeline; the gas supply regulating member is connected to the gas supply pipeline.

[0010] In a specific feasible embodiment, the gas supply regulating member includes a first manual valve, a first blind plate and a second manual valve; the first manual valve, the first blind plate and the second manual valve are all connected to the gas supply pipeline, and the first manual valve is arranged close to the gas supply device, the second manual valve is arranged close to the main inlet pipeline, and the first blind plate is located between the first manual valve and the second manual valve.

[0011] In a specific feasible embodiment, the exhaust assembly includes an exhaust pipeline and an exhaust regulating member; the exhaust pipeline is connected to the sub-inlet pipeline; the exhaust regulating member is connected to the exhaust pipeline.

[0012] In a specific feasible embodiment, the exhaust regulating member includes a third manual valve, a second blind plate and a fourth manual valve; the third manual valve, the second blind plate and the fourth manual valve are all connected to the exhaust pipeline, and the third manual valve is arranged close to the sub-inlet pipeline, the second manual valve is arranged away from the sub-inlet pipeline, and the second blind plate is located between the third manual valve and the fourth manual valve.

[0013] In a specific feasible embodiment, the exhaust assembly further includes a sampling pipeline and a first connecting valve; the sampling pipeline is connected to the exhaust pipeline, and the sampling pipeline is located on the side of the third manual valve close to the sub-inlet pipeline; a first connecting valve is connected to the sampling pipeline.

[0014] In a specific feasible embodiment, a sub-inlet regulating member is arranged on the sub-inlet pipeline, and the sub-inlet regulating member is located between the exhaust pipeline and the main inlet pipeline.

[0015] In a specific feasible embodiment, the auxiliary air intake regulating member includes a fifth hand valve, a third blind plate, and a sixth hand valve; the fifth hand valve, the third blind plate, and the sixth hand valve are all connected to the auxiliary air intake pipeline, and the fifth hand valve is arranged close to the main air intake pipeline, the sixth hand valve is arranged close to the exhaust pipeline, and the third blind plate is located between the fifth hand valve and the sixth hand valve.

[0016] In a specific feasible embodiment, a second communication valve is connected to the main air intake pipeline, and the second communication valve is arranged close to the auxiliary air intake pipeline.

[0017] To sum up, the present utility model includes the following beneficial technical effects:

[0018] 1. For the safety replacement device of the parallel pipeline at the compressor inlet of the present utility model, a replacement gas supply component is connected to the main air intake pipeline, and exhaust components are connected to all the parallel auxiliary air intake pipelines. During the maintenance process of the auxiliary air intake pipeline, the replacement gas is injected into the main air intake pipeline by the replacement gas supply component and then enters the auxiliary air intake pipeline. During this process, the replacement gas replaces the air in the main air intake pipeline and the auxiliary air intake pipeline, and the displaced air is discharged from the exhaust component, avoiding the mixing of air with the combustible gas inside the compressor, and thus avoiding safety accidents such as fire and explosion.

[0019] 2. For the safety replacement device of the parallel pipeline at the compressor inlet of the present utility model, the provided sampling pipeline facilitates the operators to timely detect the effect of air replacement in the main air intake pipeline and the auxiliary air intake pipeline, ensures that the oxygen content entering the compressor is at a safe value, and at the same time, avoids the waste of replacement gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the safety replacement device of the parallel pipeline at the compressor inlet of the present utility model.

[0021] Description of the reference numerals: 1, main air intake pipeline; 11, second communication valve; 2, auxiliary air intake pipeline; 21, auxiliary air intake regulating member; 211, fifth hand valve; 212, third blind plate; 213, sixth hand valve; 3, replacement gas supply component; 31, supply pipeline; 32, supply regulating member; 321, first hand valve; 322, first blind plate; 323, second hand valve; 4, exhaust component; 41, exhaust pipeline; 42, exhaust regulating member; 421, third hand valve; 422, second blind plate; 423, fourth hand valve; 43, sampling pipeline; 44, first communication valve; 5, compressor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions of the present utility model will be further explained below in conjunction with the drawings and embodiments, but the present utility model is not limited to the following described embodiments.

[0023] Reference Figure 1 Figure 1 , a safety replacement device for a parallel pipeline at the inlet of a compressor, comprising: a main inlet pipeline 1, a replacement gas supply assembly 3, an exhaust assembly 4, and at least two sub-inlet pipelines 2. The main inlet pipeline 1 is connected to the inlet of the compressor 5; the replacement gas supply assembly 3 is connected to the main inlet pipeline 1; at least two sub-inlet pipelines 2 are all connected to the main inlet pipeline 1, and an exhaust assembly 4 is connected to the sub-inlet pipeline 2; the replacement gas supply assembly 3 is used to supply replacement gas to the main inlet pipeline 1, and the exhaust assembly 4 is used to discharge the air replaced from the main inlet pipeline 1 and at least two sub-inlet pipelines 2 during the replacement process.

[0024] Specifically, in the present utility model, the number of sub-inlet pipelines 2 can be set to two, three, four, etc. By setting an appropriate number of sub-inlet pipelines 2, various gases to be compressed can be connected in parallel and then sent into the compressor 5.

[0025] Reference Figure 1 Figure 1 , the replacement gas supply assembly 3 includes a gas supply device, a gas supply pipeline 31, and a gas supply regulator 32. The gas supply device is connected to the gas supply pipeline 31; the gas supply pipeline 31 is communicated with the main inlet pipeline 1; the gas supply regulator 32 is connected to the gas supply pipeline 31, and the gas supply regulator 32 is used to adjust the connection and disconnection between the gas supply pipeline 31 and the main inlet pipeline 1 and to adjust the flow rate of the replacement air in the gas supply pipeline 31. Specifically, the replacement gas in the present utility model can be nitrogen, argon, helium, etc. Any setting method that safely replaces the air in the main inlet pipeline 1 and the sub-inlet pipeline 2 with the replacement gas is acceptable.

[0026] In the present utility model, during the maintenance of the sub-inlet pipeline 2, the gas supply regulator 32 is adjusted to make the gas supply pipeline 31 and the main inlet pipeline 1 in a connected state, so that the replacement gas provided by the gas supply device is injected into the main inlet pipeline 1 through the gas supply pipeline 31, realizing the supply of the replacement gas.

[0027] Reference Figure 1 Figure 1 , the gas supply regulator 32 includes a first manual valve 321, a first blind plate 322, and a second manual valve 323. The first manual valve 321, the first blind plate 322, and the second manual valve 323 are all connected to the gas supply pipeline 31, and the first manual valve 321 is arranged close to the gas supply device, the second manual valve 323 is arranged close to the main inlet pipeline 1, and the first blind plate 322 is located between the first manual valve 321 and the second manual valve 323. In the present utility model, the first blind plate 322 can be set in the shape of "8", circular, rectangular, etc. Any setting method that further improves the safety of the safety replacement device for the parallel pipeline at the inlet of the compressor through the first blind plate 322 is acceptable.

[0028] Reference Figure 1, the exhaust assembly 4 includes an exhaust pipeline 41 and an exhaust regulator 42. The exhaust pipeline 41 is connected to the secondary intake pipeline 2; the exhaust regulator 42 is connected to the exhaust pipeline 41, and the exhaust regulator 42 is used to adjust the connection and disconnection between the exhaust pipeline 41 and the secondary intake pipeline 2 and to adjust the flow rate of the replacement air inside the exhaust pipeline 41.

[0029] In the present utility model, during the maintenance process of the secondary intake pipeline 2, the exhaust regulator 42 is used to adjust the exhaust pipeline 41 and the secondary intake pipeline 2 to a connected state, so that the air replaced inside the main intake pipeline 1 and the secondary intake pipeline 2 is discharged from the exhaust pipeline 41, realizing the air replacement inside the main intake pipeline 1 and the secondary intake pipeline 2.

[0030] Refer to Figure 1 , the exhaust regulator 42 includes a third manual valve 421, a second blind plate 422, and a fourth manual valve 423. The third manual valve 421, the second blind plate 422, and the fourth manual valve 423 are all connected to the exhaust pipeline 41, and the third manual valve 421 is arranged close to the secondary intake pipeline 2, the second manual valve 323 is arranged far from the secondary intake pipeline 2, and the second blind plate 422 is located between the third manual valve 421 and the fourth manual valve 423. In the present utility model, the second blind plate 422 can be set in the shape of "8", circular, rectangular, etc., and any setting method that further improves the safety of the safety replacement device of the compressor inlet parallel pipeline through the second blind plate 422 is acceptable.

[0031] Refer to Figure 1 , a secondary intake regulator 21 is arranged on the secondary intake pipeline 2. The secondary intake regulator 21 is located between the exhaust pipeline 41 and the main intake pipeline 1. The secondary intake regulator 21 is used to adjust the connection and disconnection between the secondary intake pipeline 2 and the main intake pipeline 1 and to adjust the flow rate of the replacement air inside the secondary intake pipeline 2.

[0032] In the present utility model, during the maintenance process of the secondary intake pipeline 2, the secondary intake regulator 21 is used to adjust the connection between the secondary intake pipeline 2 and the main intake pipeline 1, so that the replacement air injected into the main intake pipeline 1 by the supply pipeline 31 can be smoothly injected into the secondary intake pipeline 2, realizing the air replacement inside the secondary intake pipeline 2.

[0033] Refer to Figure 1, the auxiliary air intake regulating member 21 includes a fifth hand valve 211, a third blind plate 212, and a sixth hand valve 213. The fifth hand valve 211, the third blind plate 212, and the sixth hand valve 213 are all connected to the auxiliary air intake pipeline 2. The fifth hand valve 211 is arranged close to the main air intake pipeline 1, the sixth hand valve 213 is arranged close to the exhaust pipeline 41, and the third blind plate 212 is located between the fifth hand valve 211 and the sixth hand valve 213. In the present utility model, the third blind plate 212 can be set in a figure-eight shape, a circular shape, a rectangular shape, etc., and any setting method that further improves the safety of the safety replacement device of the compressor inlet parallel pipeline through the third blind plate 212 is acceptable.

[0034] Embodiment 1:

[0035] Referring to Figure 1 , for the safety replacement device of the compressor inlet parallel pipeline in this embodiment, two auxiliary air intake pipelines 2 are provided, and both of the two auxiliary air intake pipelines 2 are connected to the main air intake pipeline 1. Specifically, in this embodiment, the compressor 5 is a screw compressor 5 in a pressure swing adsorption device. This screw compressor 5 mainly compresses the pressure swing adsorption desorbed gas of hydrogen production and the pressure swing adsorption desorbed gas of reforming. Correspondingly, the gases in the two auxiliary air intake pipelines 2 are respectively the pressure swing adsorption desorbed gas of hydrogen production and the pressure swing adsorption desorbed gas of reforming.

[0036] Embodiment 2:

[0037] Referring to Figure 1 , for the safety replacement device of the compressor inlet parallel pipeline in this embodiment, the replacement gas is nitrogen.

[0038] In this embodiment, nitrogen is not likely to chemically react with other substances, and nitrogen accounts for a relatively large proportion in the air. Using nitrogen for replacement can significantly reduce the risk of residual oxygen in the pipeline, thereby improving the safety of the safety replacement device of the compressor inlet parallel pipeline.

[0039] Embodiment 3:

[0040] Referring to Figure 1 , for the safety replacement device of the compressor inlet parallel pipeline in this embodiment, the exhaust assembly 4 further includes a sampling pipeline 43 and a first connection valve 44. The sampling pipeline 43 is located on the side of the third hand valve 421 close to the auxiliary air intake pipeline 2; a first connection valve 44 is connected to the sampling pipeline 43.

[0041] In this embodiment, during the maintenance of the secondary intake pipeline 2, the first connection valve 44 is closed to disconnect the sampling pipeline 43 from the exhaust pipeline 41. After the replacement gas displaces the air in the main intake pipeline 1 and the secondary intake pipeline 2 for a period of time, the first connection valve 44 is opened, and the adjustment component 5 on the exhaust pipeline 41 is adjusted so that the exhaust pipeline 41 is partially disconnected from the secondary intake pipeline 2, and the displaced air in the secondary intake pipeline 2 is discharged from the sampling pipeline 43. The operator collects the discharged gas and detects the oxygen content in the gas. If it reaches the safety standard, the supply of air replacement can be stopped. Otherwise, the air replacement continues. The provided sampling pipeline 43 facilitates the operator to timely detect the effect of air replacement in the secondary intake pipeline 2 and the main intake pipeline 1, ensures that the oxygen content entering the compressor 5 is within the safety value, and at the same time, avoids waste of the replacement gas.

[0042] Embodiment 4:

[0043] Referring to Figure 1 , in the safety replacement device of the compressor inlet parallel pipeline of this embodiment, the first blind plate 322, the second blind plate 422, and the third blind plate 212 are all set as "8"-shaped blind plates.

[0044] In this embodiment, the first blind plate 322, the second blind plate 422, and the third blind plate 212 are all set as "8"-shaped blind plates, which improves the safety of the safety replacement device of the compressor inlet parallel pipeline. Especially in a high-pressure and high-temperature environment, it can effectively prevent gas leakage or accidental mixing. At the same time, the "8"-shaped blind plate is convenient for installation, removal, and rotation operations, improving work efficiency.

[0045] Embodiment 5:

[0046] Referring to Figure 1 , in the safety replacement device of the compressor inlet parallel pipeline of this embodiment, a second connection valve 11 is connected to the main intake pipeline 1, and the second connection valve 11 is located on the side of the gas supply pipeline 31 close to the secondary intake pipeline 2.

[0047] In this embodiment, by precisely controlling the state of the second connection valve 11, it can be ensured that the replacement gas will not accidentally enter the unprepared compressor 5.

[0048] The working principle of a safety replacement device for a parallel pipeline at the inlet of a compressor according to the present utility model is as follows: During the maintenance process of the secondary intake pipeline 2, the first connection valve 44 is closed, so that the sampling pipeline 43 and the exhaust pipeline 41 are not connected; the replacement gas provided by the gas supply equipment is injected into the main intake pipeline 1 through the gas supply pipeline 31, and then enters the secondary intake pipeline 2. During this process, the replacement gas replaces the air in the main intake pipeline 1 and the secondary intake pipeline 2, and the replaced air is discharged from the exhaust pipeline 41; after the replacement gas replaces the air in the main intake pipeline 1 and the secondary intake pipeline 2 for a period of time, the first connection valve 44 is opened, and the exhaust adjustment member 42 is adjusted so that the exhaust pipeline 41 and the secondary intake pipeline 2 are in a non-connected state, and the replaced air in the secondary intake pipeline 2 is discharged from the sampling pipeline 43; the operator collects the discharged gas and detects the oxygen content in the gas. If it meets the safety standard, the supply of replacement air can be stopped. If not, the air replacement continues.

[0049] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A safe replacement device for compressor inlet parallel pipelines, characterized in that: It comprises a main air intake pipeline (1), a replacement air supply assembly (3), an exhaust assembly (4) and at least two auxiliary air intake pipelines (2); The main air intake line (1) is connected to the inlet of the compressor (5); The replacement gas supply assembly (3) is connected to the main air intake pipeline (1); At least two of the auxiliary air intake pipelines (2) are connected to the main air intake pipeline (1), and the auxiliary air intake pipelines (2) are connected to an exhaust assembly (4); The replacement gas supply assembly (3) is used to provide replacement gas to the main air intake pipeline (1), and the exhaust assembly (4) is used to exhaust the air replaced in the main air intake pipeline (1) and at least two auxiliary air intake pipelines (2).

2. The safety replacement device for compressor inlet parallel pipelines according to claim 1, characterized in that: The replacement gas supply assembly (3) comprises a gas supply device, a gas supply pipeline (31) and a gas supply regulating member (32); The gas supply device is connected to a gas supply pipeline (31); The air supply pipeline (31) is in communication with the main air intake pipeline (1); The air supply adjustment member (32) is connected to the air supply pipeline (31).

3. The safety replacement device for compressor inlet parallel pipelines according to claim 2, characterized in that: The air supply regulating member (32) comprises a first manual valve (321), a first blind plate (322) and a second manual valve (323); The first manual valve (321), the first blind plate (322) and the second manual valve (323) are all connected to the air supply pipeline (31), and the first manual valve (321) is arranged close to the air supply equipment, the second manual valve (323) is arranged close to the main air intake pipeline (1), and the first blind plate (322) is located between the first manual valve (321) and the second manual valve (323).

4. The safety replacement device for compressor inlet parallel pipelines according to claim 1, characterized in that: The exhaust assembly (4) comprises an exhaust pipeline (41) and an exhaust adjustment member (42); The exhaust pipeline (41) is connected to the auxiliary air intake pipeline (2); The exhaust adjustment member (42) is connected to the exhaust pipeline (41).

5. The safety replacement device for compressor inlet parallel pipelines according to claim 4, characterized in that: The exhaust adjustment member (42) comprises a third manual valve (421), a second blind plate (422) and a fourth manual valve (423); The third manual valve (421), the second blind plate (422) and the fourth manual valve (423) are all connected to the exhaust pipeline (41), and the third manual valve (421) is arranged close to the auxiliary air intake pipeline (2), the second manual valve (323) is arranged away from the auxiliary air intake pipeline (2), and the second blind plate (422) is located between the third manual valve (421) and the fourth manual valve (423).

6. The safety replacement device for compressor inlet parallel pipelines according to claim 5, characterized in that: The exhaust assembly (4) further comprises a sampling pipeline (43) and a first communication valve (44); The sampling pipeline (43) is connected to the exhaust pipeline (41), and the sampling pipeline (43) is located on a side of the third manual valve (421) close to the auxiliary air intake pipeline (2); The sampling pipeline (43) is connected to a first connecting valve (44).

7. The safety replacement device for compressor inlet parallel pipelines according to claim 4, characterized in that: The secondary air intake pipeline (2) is provided with a secondary air intake regulating member (21), and the secondary air intake regulating member (21) is located between the exhaust pipeline (41) and the main air intake pipeline (1).

8. The safe replacement device for compressor inlet parallel pipelines according to claim 7, characterized in that: The auxiliary air intake regulating member (21) comprises a fifth manual valve (211), a third blind plate (212) and a sixth manual valve (213); The fifth manual valve (211), the third blind plate (212) and the sixth manual valve (213) are all connected to the auxiliary air intake pipeline (2), and the fifth manual valve (211) is arranged close to the main air intake pipeline (1), the sixth manual valve (213) is arranged close to the exhaust pipeline (41), and the third blind plate (212) is located between the fifth manual valve (211) and the sixth manual valve (213).

9. The safety replacement device for compressor inlet parallel pipelines according to claim 1, characterized in that: The main air intake pipeline (1) is connected to a second connecting valve (11), and the second connecting valve (11) is arranged close to the auxiliary air intake pipeline (2).

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