Reciprocating compressor blowdown system

Abstract

The utility model discloses a sewerage system of a reciprocating compressor, which belongs to the technical field of auxiliary equipment of the reciprocating compressor and comprises a compressor body, and the compressor body comprises a plurality of stages of gas compression mechanisms communicated in sequence. The first gas inlet scrubber is provided with a gas inlet, a gas phase outlet and a liquid phase outlet, and the gas phase outlet of the first gas inlet scrubber is communicated with an inlet of the first-stage gas compression mechanism; the blow-down tank is provided with a liquid inlet and a blow-down port, and a liquid phase outlet of the first air inlet scrubber is communicated with the liquid inlet through a pipeline; according to the reciprocating compressor, liquid in a gas medium entering the reciprocating compressor can be separated out through the first air inlet washer, and the liquid automatically flows into the blow-down tank under the action of gravity; the pollution discharge tank can quickly discharge liquid when being filled with the liquid, the pollution discharge process is convenient and quick, normal operation of the reciprocating compressor is ensured, the problem that sewage cannot be treated under the condition that a wellhead is temporarily arranged or a matched pipe network is not provided is effectively solved, and the supervision cost of manual transportation and wellhead gas production is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to reciprocating compressor auxiliary equipment technical field, concretely relates to a reciprocating compressor blowdown system. BACKGROUND

[0002] Wellhead is the part of wellbore and ground connection, in the natural gas development process, wellhead increases the protection of the first stage emergency shut-off wellhead gas source under the unexpected and out of control condition on the basis of traditional pressure safety valve (pressure relief).

[0003] Wellhead natural gas in the use reciprocating compressor booster transmission, often will separate out a large amount of water and heavy hydrocarbon liquid mixture, if not timely processing, will influence the normal operation of reciprocating compressor, but, limited by the uncertainty of wellhead position, easy to lack the matching sewage treatment system.

[0004] Therefore, research and development design a kind of liquid mixture separated out in the process of compressed reciprocating compressor booster can be conveniently transported to downstream with natural gas, solve the sewage treatment problem of wellhead without matching pipe network condition of blowdown system is an urgent problem to be solved at present stage. UTILITY MODEL CONTENT

[0005] For the problems existing in the prior art, the utility model provides a reciprocating compressor blowdown system, liquid in the gaseous medium entering the reciprocating compressor is separated and separated out by the first gas inlet scrubber, and the liquid flows into the blowdown tank under the action of gravity;The liquid in the blowdown tank is discharged by the high-pressure gas generated by the last-stage gas compression mechanism, and the internal pressure of the blowdown tank is discharged through the pressure relief port after the blowdown tank is blowdown, so that the liquid in the first gas inlet scrubber can flow into the blowdown tank again, effectively solve the problem that sewage cannot be treated under the condition that wellhead is temporarily set or has no matching pipe network, and reduce the manual transportation and supervision cost of wellhead gas production.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme as follows:

[0007] The utility model provides a reciprocating compressor blowdown system, which comprises:

[0008] The compressor body comprises a plurality of gas compression mechanisms connected in series.

[0009] The first gas inlet scrubber has a gas inlet, a gas phase outlet and a liquid phase outlet, and the gas phase outlet of the first gas inlet scrubber is communicated with the inlet of the first-stage gas compression mechanism.

[0010] The blowdown tank has a liquid inlet and a blowdown port, and the liquid phase outlet of the first gas inlet scrubber is communicated with the liquid inlet through a pipeline.

[0011] As a preferred technical solution, the liquid phase outlet of the first gas inlet scrubber is located above the liquid inlet.

[0012] As a preferred technical solution, the blowdown tank is provided with a backflow port communicated with the outlet of the last-stage gas compression mechanism, and a pneumatic on-off valve is arranged on the pipeline between the backflow port and the last-stage gas compression mechanism.

[0013] As a preferred technical solution, the blowdown tank is provided with a pressure relief port located above the liquid inlet.

[0014] As a preferred technical solution, the pressure relief port is communicated with the gas inlet of the first gas inlet scrubber through a pipeline, and a pressure relief valve is arranged on the pipeline between the pressure relief port and the gas inlet of the first gas inlet scrubber.

[0015] As a preferred technical solution, the compressor body comprises three-stage gas compression mechanisms communicated in sequence.

[0016] As a preferred technical solution, a second gas inlet scrubber is arranged between the first-stage gas compression mechanism and the second-stage gas compression mechanism, the gas inlet of the second gas inlet scrubber is communicated with the outlet of the first-stage gas compression mechanism, the gas phase outlet of the second gas inlet scrubber is communicated with the inlet of the second-stage gas compression mechanism, and the liquid phase outlet of the second gas inlet scrubber is communicated with the liquid inlet through a pipeline.

[0017] As a preferred technical solution, a third gas inlet scrubber is arranged between the second-stage gas compression mechanism and the last-stage gas compression mechanism, the gas inlet of the third gas inlet scrubber is communicated with the outlet of the second-stage gas compression mechanism, the gas phase outlet of the third gas inlet scrubber is communicated with the inlet of the last-stage gas compression mechanism, and the liquid phase outlet of the third gas inlet scrubber is communicated with the liquid inlet through a pipeline.

[0018] As a preferred technical solution, a pneumatic on-off valve is arranged on the pipeline between the liquid phase outlet of the second gas inlet scrubber and the liquid inlet and on the pipeline between the liquid phase outlet of the third gas inlet scrubber and the liquid inlet.

[0019] As a preferred technical solution, a check valve is arranged on the pipeline between the liquid phase outlet of the first gas inlet scrubber and the liquid inlet, on the pipeline between the liquid phase outlet of the second gas inlet scrubber and the liquid inlet, on the pipeline between the liquid phase outlet of the third gas inlet scrubber and the liquid inlet, and on the pipeline between the last-stage gas compression mechanism and the backflow port.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1、The utility model discloses a first air intake scrubber can separate and analyze the liquid in the gaseous medium that enters the reciprocating compressor, and the liquid can automatically flow into the blowdown tank under the action of gravity, when the blowdown tank is full of liquid, the high-pressure gas generated by the last-stage gas compression mechanism can rapidly discharge the liquid in the blowdown tank, and after the blowdown process of the blowdown tank is completed, the pressure inside the blowdown tank can be released through the pressure release port, so that the liquid in the first air intake scrubber can flow into the blowdown tank again, the blowdown process is convenient and fast, the normal operation of the reciprocating compressor is ensured, and the problem that sewage cannot be treated under the condition that the wellhead is temporarily set or is not matched with a pipe network is solved effectively, manual transportation and the supervision cost of wellhead gas production are reduced.

[0022] 2、The utility model discloses a second air intake scrubber and a third air intake scrubber can separate and analyze the liquid in the gaseous medium that enters the second-stage gas compression mechanism and the last-stage gas compression mechanism respectively, and the liquid is discharged into the blowdown tank periodically by using the pressure difference, so that the liquid mixture generated when the gas compression mechanism at all stages is pressurized and transferred can be treated in time. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure schematic view of one embodiment of the utility model discloses a reciprocating compressor blowdown system. DETAILED DESCRIPTION

[0024] In order to facilitate the person skilled in the art to understand, the utility model is further explained below in combination with the drawings.

[0025] Please refer to Figure 1The utility model provides a kind of embodiment of a reciprocating compressor blowdown system, including compressor body, compressor body includes three-stage gas compression mechanism that is communicated sequentially;First intake scrubber has gas inlet, gas phase outlet and liquid phase outlet, and the gas phase outlet of first intake scrubber is communicated with the inlet of first-stage gas compression mechanism, and wellhead natural gas enters through the gas inlet of first intake scrubber, and first intake scrubber is used to filter the gaseous medium that enters first-stage gas compression mechanism, and separates liquid in gaseous medium;Blowdown tank has liquid inlet, blowdown port, backflow port and pressure release port, and the liquid phase outlet of first intake scrubber is communicated with liquid inlet by pipeline, and the liquid separated by first intake scrubber can flow into blowdown tank sequentially through liquid phase outlet and liquid inlet;Backflow port is communicated with the outlet of last-stage gas compression mechanism by pipeline, and pneumatic on-off valve is arranged on the pipeline between backflow port and last-stage gas compression mechanism, when liquid in blowdown tank is full, pneumatic on-off valve opens, and high-pressure gas generated by last-stage gas compression mechanism can rapidly discharge liquid in blowdown tank from blowdown port;Pressure release port is communicated with the gas inlet of first intake scrubber by pipeline, and pressure release port is located above liquid inlet, and pressure release valve is arranged on the pipeline between pressure release port and the gas inlet of first intake scrubber, when liquid in blowdown tank is discharged, pressure release valve opens, and high-pressure gas in blowdown tank can be returned to first intake scrubber for reutilization, while the pressure in blowdown tank is reduced, to ensure that liquid in first intake scrubber can continue to flow into blowdown tank.

[0026] In other embodiments, the compressor body can also include two-stage or four-stage gas compression mechanism to effectively compress and transport wellhead natural gas.

[0027] Specifically, compressor body and first intake scrubber are placed on skid, and blowdown tank is placed inside skid, during the compression and transmission of wellhead natural gas, most of liquid mixture is separated when passing through first intake scrubber, due to the separation of a large amount of liquid, the pressure in first intake scrubber is the lowest value of the pressure of the whole skid, lacking the pressure energy to make liquid flow, blowdown tank is located below first intake scrubber, so that the liquid phase outlet of first intake scrubber is located above liquid inlet, to ensure that liquid in first intake scrubber can automatically flow into blowdown tank under the action of gravity.

[0028] It should be noted that, Figure 1 The arrow direction in the figure is the flow direction of gaseous medium.

[0029] In the embodiment, please refer to Figure 1, the second gas compression mechanism and the third gas compression mechanism are provided with a third gas inlet scrubber, the gas inlet of the third gas inlet scrubber is communicated with the outlet of the second gas compression mechanism, the gas phase outlet of the third gas inlet scrubber is communicated with the inlet of the third gas compression mechanism, the liquid phase outlet of the third gas inlet scrubber is communicated with the liquid inlet through a pipeline, the third gas inlet scrubber can separate and analyze the liquid in the gas medium entering the third gas compression mechanism, and the liquid flows into the blowdown tank under the action of the gas pressure difference.

[0030] Similarly, please refer to Figure 1 , the second gas compression mechanism and the third gas compression mechanism are provided with a third gas inlet scrubber, the gas inlet of the third gas inlet scrubber is communicated with the outlet of the second gas compression mechanism, the gas phase outlet of the third gas inlet scrubber is communicated with the inlet of the third gas compression mechanism, the liquid phase outlet of the third gas inlet scrubber is communicated with the liquid inlet through a pipeline, the third gas inlet scrubber can separate and analyze the liquid in the gas medium entering the third gas compression mechanism, and the liquid flows into the blowdown tank under the action of the gas pressure difference.

[0031] Further, please refer to Figure 1 , since the liquid generated by the second gas inlet scrubber and the third gas inlet scrubber is relatively small, the pipeline between the liquid phase outlet of the second gas inlet scrubber and the liquid inlet and the pipeline between the liquid phase outlet of the third gas inlet scrubber and the liquid inlet should be provided with a pneumatic on-off valve, which is opened and closed regularly, when the pneumatic on-off valve is opened, the liquid in the second gas inlet scrubber and the third gas inlet scrubber can automatically flow into the blowdown tank under the action of the gas pressure difference; when the pneumatic on-off valve is closed, the high-pressure gas in the second gas inlet scrubber and the third gas inlet scrubber can be prevented from entering the blowdown tank.

[0032] In the embodiment, please refer to Figure 1 , the pipeline between the liquid phase outlet of the first gas inlet scrubber and the liquid inlet, the pipeline between the liquid phase outlet of the second gas inlet scrubber and the liquid inlet, the pipeline between the liquid phase outlet of the third gas inlet scrubber and the liquid inlet, and the pipeline between the third gas compression mechanism and the backflow port are all provided with a check valve, which can effectively prevent the liquid from flowing back.

[0033] Please refer to Figure 1 , the specific operation process of the utility model is as follows:

[0034] When the liquid in the blowdown tank is full, open the pneumatic on-off valve communicated with the backflow port, and adjust the pressure relief valve to be smaller or closed, so that the high-pressure gas generated by the third gas compression mechanism can rapidly discharge the liquid in the blowdown tank from the blowdown port;

[0035] Since the compressed high-pressure gas enters the blowdown tank, the pressure in the blowdown tank increases, in order to prevent the liquid from flowing back, a check valve needs to be arranged on each low-pressure pipeline communicated with the liquid inlet.

[0036] In order to ensure that the liquid in the first intake scrubber can continue to flow into the blowdown tank, after the liquid in the blowdown tank is completely discharged, the pressure relief valve is opened, the high-pressure gas in the blowdown tank is returned to the intake pipeline, the pressure in the blowdown tank is reduced, and the liquid in the first intake scrubber can automatically flow into the blowdown tank under the action of gravity.

[0037] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. 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. A reciprocating compressor blowdown system characterized by, The utility model relates to a compressor body, first gas inlet scrubber, blowdown tank and pressure relief port. The compressor body comprises a plurality of gas compression mechanisms connected in series. The first gas inlet scrubber has a gas phase outlet and a liquid phase outlet, and the gas phase outlet of the first gas inlet scrubber is connected to the inlet of the first gas compression mechanism. The blowdown tank has a liquid inlet and a blowdown outlet, and the liquid phase outlet of the first gas inlet scrubber is connected to the liquid inlet by a pipeline.

2. A blowdown system for a reciprocating compressor as set forth in claim 1, characterized in that, The liquid phase outlet of the first gas inlet scrubber is located above the liquid inlet.

3. A reciprocating compressor blowdown system as set forth in claim 1 wherein, The blowdown tank has a backflow outlet connected to the outlet of the last gas compression mechanism by a pipeline, and a pneumatic on-off valve is arranged on the pipeline between the backflow outlet and the last gas compression mechanism.

4. A reciprocating compressor blowdown system as set forth in claim 2 wherein, The blowdown tank has a pressure relief port located above the liquid inlet.

5. A reciprocating compressor blowdown system as set forth in claim 4 wherein, The pressure relief port is connected to the gas inlet of the first gas inlet scrubber by a pipeline, and a pressure relief valve is arranged on the pipeline between the pressure relief port and the gas inlet of the first gas inlet scrubber.

6. A reciprocating compressor blowdown system as set forth in claim 3 wherein, The compressor body comprises three gas compression mechanisms connected in series.

7. A reciprocating compressor blowdown system as set forth in claim 6 wherein, A second gas inlet scrubber is arranged between the first gas compression mechanism and the second gas compression mechanism, the gas inlet of the second gas inlet scrubber is connected to the outlet of the first gas compression mechanism, the gas phase outlet of the second gas inlet scrubber is connected to the inlet of the second gas compression mechanism, and the liquid phase outlet of the second gas inlet scrubber is connected to the liquid inlet by a pipeline.

8. A reciprocating compressor blowdown system as set forth in claim 7 wherein, A third gas inlet scrubber is arranged between the second gas compression mechanism and the last gas compression mechanism, the gas inlet of the third gas inlet scrubber is connected to the outlet of the second gas compression mechanism, the gas phase outlet of the third gas inlet scrubber is connected to the inlet of the last gas compression mechanism, and the liquid phase outlet of the third gas inlet scrubber is connected to the liquid inlet by a pipeline.

9. A reciprocating compressor blowdown system as set forth in claim 8 wherein, Pneumatic on-off valves are arranged on the pipelines between the liquid phase outlet of the second gas inlet scrubber and the liquid inlet and between the liquid phase outlet of the third gas inlet scrubber and the liquid inlet.

10. A blowdown system for a reciprocating compressor as set forth in claim 8, characterized in that, Check valves are arranged on the pipelines between the liquid phase outlet of the first gas inlet scrubber and the liquid inlet, between the liquid phase outlet of the second gas inlet scrubber and the liquid inlet, between the liquid phase outlet of the third gas inlet scrubber and the liquid inlet, and between the last gas compression mechanism and the backflow outlet.

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