Automatic condensate discharge device for cold blow-down pipeline of offshore production platform

Abstract

An automatic condensate discharge device for a cold blow-down pipeline of an offshore oil production platform is characterized in that an electromagnetic valve is arranged on a discharge branch of the cold blow-down discharge pipeline, the electromagnetic valve is connected with an intelligent time control module through a control circuit, and the control circuit and the electromagnetic valve are powered by a DC 24v direct current power supply; the intelligent time control module is provided with an electromagnetic valve manual control switch and an operation indicating lamp. The utility model has the beneficial effects that the bypass discharge pipeline is additionally arranged on the cold blow discharge pipeline, the electromagnetic valve is additionally arranged for exhausting gas in the pipeline, and the electromagnetic valve adopts the time control module as a main control element, so that the automatic timing discharge of condensate can be effectively and finally realized; on the basis, the electromagnetic valve control circuit is connected with a central control room, so that a worker can visually observe the site condition, and the accident risk caused by the fact that condensate in the pipeline is not discharged in time is reduced. According to the scheme, on the basis that the connection design principle of the cable penetrating device is met, the natural gas leakage gas catching monitoring and early warning effects are achieved.

Description

Technical Field

[0001] The utility model relates to the field of petroleum engineering, and more specifically to an automatic discharge device for condensate of cold vent pipelines of offshore oil production platforms. Background Art

[0002] During the process of offshore oil production and development, the cold venting system of the offshore oil platform mainly receives the exhaust gas from the crude oil buffer tank, the nitrogen-sealed exhaust gas of the inclined plate deoiler, and the waste oil tanks of the three compressors. The exhaust gas received by the cold venting system contains a mixture of combustible gas, water vapor, light hydrocarbons, etc. When the mixed gas is discharged to the cold vent head with a lower temperature at high altitude, part of the mixed gas will be discharged, while the other part will flow back along the pipeline after condensation. If the condensate in the pipeline is not discharged in time, it will cause the upstream production process to be under pressure. In extreme cases, it may cause the condensate to spray out from the cold vent, posing a threat to the safe production of the platform. At the same time, in the cold winter, if the condensate in the cold vent pipeline is not discharged in time, once freezing and blockage occur, it will seriously affect the stable operation of the process. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and provides an automatic condensate discharge device for cold vent pipelines of offshore oil production platforms.

[0004] The purpose of the utility model is achieved through the following technical solutions.

[0005] An automatic discharge device for condensate of a cold vent pipeline of an offshore oil production platform comprises: a solenoid valve and an intelligent time control module, wherein a control relay is arranged on the intelligent time control module, and a control relay coil portion has a first connection end and a second connection end, wherein the first connection end of the control relay coil portion is respectively connected to a power supply and a timer, a first branch of the second connection end is connected to the power supply through a switch converter, and a second branch of the second connection end is connected to the power supply through a time relay, a timer and a switch converter in sequence, a power indicator light is arranged in parallel on the power supply, an operation indicator light is arranged in parallel on both ends of the control relay coil portion, and contacts of the control relay are arranged on a control circuit of the relay.

[0006] The control circuit includes a power supply and an AC-DC power conversion module, and the power supply is connected to the solenoid valve through the AC-DC power conversion module and the contacts of the control relay line in sequence.

[0007] A solenoid valve is provided on a bypass discharge line of the cold vent discharge line.

[0008] The beneficial effects of the utility model are:

[0009] This scheme improves the combustible gas capture monitoring and early warning device at the wellhead of the Christmas tree through the cable penetrator; by adding a bypass discharge pipeline to the cold vent discharge pipeline and adding a solenoid valve to exhaust the air in the pipe, the solenoid valve uses a time control module as the main control element, which can effectively realize the automatic timed discharge of condensate. On this basis, the solenoid valve control circuit is connected to the central control room, so that the staff can observe the on-site situation intuitively, which is convenient for use and effectively reduces the risk of accidents caused by not timely removing the condensate in the pipeline. It can play a role in natural gas leakage gas capture monitoring and early warning on the basis of meeting the design principles of the cable penetrator connection, and has good economic benefits and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is the circuit diagram of the intelligent time control module of the utility model;

[0012] Figure 3 It is a circuit diagram of the control circuit of the utility model;

[0013] In the figure: KM1, control relay; L1, power indicator light; L2, operation indicator light; SJ, time relay; SA1, switch converter; M, solenoid valve. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further described below through specific embodiments.

[0015] Example

[0016] like Figure 1-3 As shown, the working principle of the utility model is as follows:

[0017] The control circuit in this device provides DC24V power supply to the solenoid valve through the AC-DC power conversion module, and the contact part of the control relay KM1 ensures that the solenoid valve M accepts remote control.

[0018] The intelligent time control module sets the opening time and opening time interval of the solenoid valve M through the timer. The switch converter SA1 is used for the manual and automatic control switching function of the solenoid valve M. The control relay KM1 is used to control the solenoid valve M. The power indicator light L1 and the operation indicator light L2 indicate the power supply and the operation of the solenoid valve respectively.

[0019] When switched to manual control, the control relay KM1 is energized through the first branch and the contacts of the control relay KM1 are closed to supply power to the relay M.

[0020] When switched to automatic control, the control relay KM1 is energized through the second branch and the operation of the solenoid valve is controlled by the timer to control the opening time and opening time interval of the solenoid valve M.

[0021] Preferably, the solenoid valve M is set to a fail-open mode to ensure on-site safety setting in the event of a remote control failure.

[0022] Furthermore, the device is arranged on a newly added bypass discharge line of the condensate discharge line of the cold vent discharge line, and the automatic discharge of the condensate is realized by switching the automatic control solenoid valve with the discharge time set.

[0023] In actual use, the entire device is connected to the central control room through an instrument cable, and the system in the central control room makes judgments and controls, and controls the on-site solenoid valves through a remote control system. When the discharge time reaches the set value, the system output is triggered, and the remote solenoid valve is connected through an instrument cable. The condensate is discharged using the controlled solenoid valve, which greatly improves the reliability and timeliness of human judgment, and promptly and effectively resolves potential accidents caused by natural gas leaks.

[0024] Preferably, the intelligent time control module uses an intelligent high-precision digital display dual-cycle time control module as the main component of the solenoid valve control circuit, and adjusts the discharge of condensate according to the actual situation on site and the accumulation of condensate in different seasons to ensure that the condensate can be discharged in time. The discharge time and discharge duration of the on-site solenoid valve are set according to different working conditions and ambient temperatures to achieve variability control. The switch of the solenoid valve is remotely controlled by setting the discharge and cycle time, and the automatic timed discharge of the condensate is finally achieved. Through the timer and solenoid valve status indication, the on-duty personnel can grasp the discharge situation of the on-site process in real time, make timely judgments on the site when the process is abnormal, and improve the reliability of the on-site process.

[0025] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. An automatic discharge device for condensate in cold vent pipeline of offshore oil production platform, characterized in that: include: A solenoid valve and an intelligent time control module, wherein a control relay is provided on the intelligent time control module, wherein a control relay coil portion has a first connection end and a second connection end, wherein the first connection end of the control relay coil portion is respectively connected to a power supply and a timer, wherein a first branch of the second connection end is connected to the power supply through a switch converter, wherein a second branch of the second connection end is connected to the power supply through a time relay, a timer and a switch converter in sequence, wherein a power indicator light is arranged in parallel on the power supply, an operation indicator light is arranged in parallel on both ends of the control relay coil portion, and wherein contacts of the control relay are arranged on a control circuit of the relay.

2. The automatic discharge device for condensate in cold vent pipeline of offshore oil production platform according to claim 1 is characterized by: The control circuit includes a power supply and an AC-DC power conversion module, and the power supply is connected to the solenoid valve through the AC-DC power conversion module and the contacts of the control relay line in sequence.

3. The automatic condensate discharge device for cold vent pipeline of offshore oil production platform according to claim 1 is characterized by: A solenoid valve is provided on a bypass discharge line of the cold vent discharge line.

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