Multi-stage composite deep treatment oil gas recovery equipment

Abstract

The utility model relates to multi-stage composite deep treatment oil gas recovery equipment which comprises an oil tank and a PLC (Programmable Logic Controller), the oil tank is sequentially connected with an adsorption vacuum pump, a pre-cooling unit, an oil gas separator, a membrane separator, a flexible commutator, a terminal deep treatment unit and an analysis vacuum pump through a gas inlet pipeline; the terminal deep treatment unit comprises a plurality of tank bodies which are connected in a crossed manner, a plurality of groups of adsorption units and separation units are arranged in the tank bodies, and the adsorption units and the separation units are connected in series and in parallel; a gas outlet pipeline of the membrane separator is provided with a pressure stabilizing system, the pressure stabilizing system comprises a one-way valve, a regulating valve and a pressure transmitter which are connected in sequence, and the pressure stabilizing system is respectively connected with the flexible reverser and an inlet of the terminal deep processing unit; and gas detectors are arranged on the pipeline between the flexible commutator and the discharge port and the pipeline between the terminal deep processing unit and the discharge port. The oil-gas separation device improves the oil-gas separation effect through composite treatment.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas recovery, and particularly relates to a multi-stage composite deep treatment oil and gas recovery device. Background Technique

[0002] Among several existing oil and gas recovery methods, the adsorption method device directly receives and processes oil and gas through an adsorption tower under normal pressure, and has the strongest adaptability to the fluctuation of oil and gas. However, the frequent switching of the adsorption tower requires high-quality switching valves and vacuum pumps, and the startup of the device is not necessarily synchronized with the loading process; the condenser of the condensation method device directly receives and processes oil and gas under normal pressure, and as long as the condenser of the device maintains a sufficiently low temperature, it also has good adaptability to the fluctuation of oil and gas, but the energy consumption is relatively high; the membrane separation method can obtain a lower tail gas emission concentration, and the oil and gas during the loading process is directly recovered into the compressor. However, during the operation period of the oil depot, regardless of whether there is oil loading operation or the size of the oil loading volume, the compressor must be in operation, and the compressor and other main equipment must meet the requirements of the maximum load processing capacity. This not only requires high requirements for the device itself, but also the corresponding operation energy consumption is relatively high.

[0003] The above various processes for oil and gas recovery all have timeliness. After long-term use, the effect of the system on oil and gas recovery will be greatly reduced, and the concentration of the discharged gas cannot be effectively controlled. Content of the Utility Model

[0004] In order to solve the problems of the existing technology, the utility model provides a multi-stage composite deep treatment oil and gas recovery device, which solves the problem of poor oil and gas separation effect at present.

[0005] The purpose of the utility model and the solution of its technical problems are realized by adopting the following technical solutions. A multi-stage composite deep treatment oil and gas recovery device proposed according to the utility model includes an oil tank, a PLC controller, a flexible commutator, a terminal deep treatment unit, and an analysis vacuum pump. The oil tank is sequentially connected to an adsorption vacuum pump, a precooling unit, an oil and gas separator, and a membrane separator through an intake pipeline; a pressure stabilizing system is provided on the outlet pipeline of the membrane separator. The pressure stabilizing system includes a check valve, a regulating valve, and a pressure transmitter connected in sequence, and the pressure stabilizing system is respectively connected to the flexible commutator and the inlet of the terminal deep treatment unit; gas detectors are provided on the pipelines between the flexible commutator and the discharge port and between the terminal deep treatment unit and the discharge port; the intake end of the analysis vacuum pump is respectively connected to the analysis ends of the membrane separator and the terminal deep treatment unit, and the outlet end of the analysis vacuum pump is connected to the oil return pipeline of the oil tank; the output end of the PLC controller is respectively electrically connected to the precooling unit, the adsorption vacuum pump, and the analysis vacuum pump, and its input end is electrically connected to the gas detector.

[0006] Further, a direction control valve and a pressure sensor are provided on the intake pipeline between the oil tank and the adsorption vacuum pump.

[0007] Further, a second electromagnetic valve is provided on the pipeline between the voltage stabilizing system and the inlet of the terminal deep treatment unit, and a sixth electromagnetic valve is provided on the pipeline between the voltage stabilizing system and the inlet of the flexible commutator.

[0008] Further, a third electromagnetic valve is provided on the pipeline between the analytical vacuum pump and the membrane separator, and a fourth electromagnetic valve is provided on the pipeline between the analytical vacuum pump and the terminal deep treatment unit.

[0009] Further, the oil-gas separator is connected to the oil return port of the oil tank through a first oil return pipeline, and a first electromagnetic valve is provided on the first oil return pipeline.

[0010] Further, a fifth electromagnetic valve is provided on the pipeline between the terminal deep treatment unit and the gas detector.

[0011] In summary, the present utility model can obtain the following advantages:

[0012] (1) The gas outlet end of the voltage stabilizing system is respectively connected to the flexible commutator and the terminal deep treatment unit. In this way, the gas flow direction can be changed, and different flow directions can be selected at different treatment stages to realize the composite treatment of oil and gas.

[0013] (2) The terminal deep treatment units are cross-connected. When the adsorption and separation actions of oil and gas are carried out, the gas path flows through the series pipeline, which prolongs the residence time of oil and gas in the pipeline, and can better realize the separation of oil and gas from air. When the desorption and analysis processes of oil and gas are carried out, the gas flows through the parallel pipeline, which can ensure that the oil and gas quickly leave the treatment unit and finally return to the oil tank, reducing the contact between the oil and gas and the treatment unit, and having a significant effect on prolonging the service life of the treatment unit.

[0014] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following preferred embodiments are specifically given and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further describes the technical solution of the present utility model in conjunction with the accompanying drawings and preferred embodiments.

[0017] An embodiment of a multi-stage composite deep treatment oil and gas recovery device:

[0018] Such as Figure 1As shown in the figure, a multi-stage composite deep treatment oil and gas recovery device includes an oil tank 20, a PLC controller, a flexible commutator 17, a terminal deep treatment unit 19, and an analytical vacuum pump 9. The oil tank 20 is sequentially connected to an adsorption vacuum pump 3, a pre-cooling unit 4, an oil and gas separator 5, and a membrane separator 13 through an intake pipeline. The pre-cooling unit 4, the oil and gas separator 5, the membrane separator 13, and the terminal deep treatment unit 19 are existing known devices. The flexible commutator 17 has the characteristic of unidirectional gas flow, and the gas flow rate is controllable. The terminal deep treatment unit 19 includes multiple cross-connected tanks, and multiple groups of adsorption units and separation units are arranged inside the tanks. The adsorption units and separation units are connected in a combination of series and parallel. A pressure stabilizing system is provided on the outlet pipeline of the membrane separator 13. The pressure stabilizing system includes a one-way valve 8, a regulating valve 10, and a pressure transmitter 7 connected in sequence. The outlet of the pressure transmitter 7 is respectively connected to the flexible commutator 17 and the intake port of the terminal deep treatment unit. Gas detectors 12 are provided on the pipelines between the flexible commutator 17 and the discharge port and between the terminal deep treatment unit 19 and the discharge port. The intake end of the analytical vacuum pump 9 is respectively connected to the analytical ends of the membrane separator 13 and the terminal deep treatment unit 19, and the outlet end of the analytical vacuum pump 9 is connected to the oil return pipeline of the oil tank 20. The output end of the PLC controller is respectively electrically connected to the pre-cooling unit 4, the adsorption vacuum pump 3, and the analytical vacuum pump 9, and its input end is electrically connected to the gas detector 12.

[0019] In this embodiment, a direction control valve 1 and a pressure sensor 2 are provided on the intake pipeline between the oil tank 20 and the adsorption vacuum pump 3.

[0020] In this embodiment, a second solenoid valve 11 is provided on the pipeline between the pressure stabilizing system and the inlet of the terminal deep treatment unit 19, and a sixth solenoid valve 18 is provided on the pipeline between the pressure stabilizing system and the inlet of the flexible commutator 17.

[0021] In this embodiment, a third solenoid valve 14 is provided on the pipeline between the analytical vacuum pump 9 and the membrane separator 13, and a fourth solenoid valve 15 is provided on the pipeline between the analytical vacuum pump 9 and the terminal deep treatment unit 19.

[0022] In this embodiment, the oil and gas separator 5 is connected to the oil return port of the oil tank 20 through a first oil return pipeline, and a first solenoid valve 6 is provided on the first oil return pipeline.

[0023] In this embodiment, a fifth solenoid valve 16 is provided on the pipeline between the terminal deep treatment unit 19 and the gas detector 12.

[0024] All solenoid valves are electrically connected to the output end of the PLC controller, and the pressure transmitter 7 and the pressure sensor 2 are electrically connected to the input end of the PLC controller.

[0025] The working process of this embodiment:

[0026] After the equipment is powered on, the adsorption vacuum pump 3, the precooling unit 4, and the analytical vacuum pump 9 start to run, the valve body in the adsorption vacuum pump 3 opens, and the oil and gas in the oil tank 20 begin to be extracted by the adsorption vacuum pump 3. After the oil and gas are processed inside the adsorption vacuum pump 3 and the precooling unit 4, the oil and gas state is low temperature and high pressure, and part of the oil and gas is liquefied into liquid state. After gas-liquid separation by the oil and gas separator 5, part of the oil and gas enters the membrane separator 13, and part of the large particle oil droplets return to the oil tank 20 through the first solenoid valve 6; then the first solenoid valve 6, the sixth solenoid valve 18, and the fourth solenoid valve 15 are closed, the second solenoid valve 11, the third solenoid valve 14, and the fifth solenoid valve 16 are opened, and the oil and gas passing through the membrane separator 13 enter the terminal deep processing unit 19 for deep processing. When the adsorption and separation of oil and gas are in action, the gas path circulates through the series pipeline, which prolongs the residence time of oil and gas in the pipeline, and can better realize the separation of oil and gas from air. When the desorption and analytical process of oil and gas is in action, the gas circulates through the parallel pipeline, which can ensure The oil and gas quickly separate from the processing unit, which reduces the contact between the oil and gas and the processing unit and has a significant effect on extending the service life of the processing unit. The treated gas is discharged after being detected by the gas detector 12, and the treated oil enters the analysis vacuum pump 9 and finally returns to the oil tank 20. When the terminal deep processing unit 19 finishes processing, the second solenoid valve 11 and the fifth solenoid valve 16 are closed, the sixth solenoid valve 18 and the fourth solenoid valve 15 are opened, and the oil and gas are discharged through the membrane separator 13 and the flexible diverter 17. At the same time, the analysis vacuum pump 9 analyzes the terminal deep processing unit 19. When the flexible diverter 17 works, the one-way valve and the limiting valve inside the flexible diverter are opened. When the terminal deep processing unit 19 analyzes and receives, the adsorption vacuum pump 3, the precooling unit 4, the analysis vacuum pump 9, the third solenoid valve 14, the fourth solenoid valve 15, the fifth solenoid valve 16, the second solenoid valve 11 and the sixth solenoid valve 18 are closed, and the first solenoid valve 6 is closed after being opened for a period of time, and the liquid in the oil-gas separator 5 is discharged into the oil tank 20.

[0027] In other embodiments of the present invention, an adsorption unit or a separation unit may also be separately provided inside the tank of the terminal deep processing unit 19 .

[0028] The above is only a preferred embodiment of the present invention. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, makes any simple modifications, equivalent changes and modifications to the above embodiments based on the technical essence of the present invention, which still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-stage composite deep treatment oil and gas recovery device, comprising an oil tank (20) and a PLC controller, characterized in that: It further includes a flexible commutator (17), a terminal deep treatment unit (19) and an analytical vacuum pump (9). The oil tank (20) is sequentially connected to an adsorption vacuum pump (3), a precooling unit (4), an oil-gas separator (5), and a membrane separator (13) through an intake pipeline; A pressure stabilizing system is provided on the outlet pipeline of the membrane separator (13). The pressure stabilizing system includes a one-way valve (8), a regulating valve (10), and a pressure transmitter (7) connected in sequence. The pressure stabilizing system is respectively connected to the inlets of the flexible commutator (17) and the terminal deep treatment unit (19); Gas detectors (12) are provided on the pipelines between the flexible commutator (17) and the discharge port, and between the terminal deep treatment unit (19) and the discharge port; The intake end of the analytical vacuum pump (9) is respectively connected to the analytical ends of the membrane separator (13) and the terminal deep treatment unit (19), and the outlet end of the analytical vacuum pump (9) is connected to the oil return pipeline of the oil tank (20); The output end of the PLC controller is respectively electrically connected to the precooling unit (4), the adsorption vacuum pump (3), and the analytical vacuum pump (9), and its input end is electrically connected to the gas detector (12).

2. The multi-stage composite advanced treatment oil and gas recovery equipment according to claim 1, wherein: A direction control valve and a pressure sensor (2) are provided on the intake pipeline between the oil tank (20) and the adsorption vacuum pump (3).

3. A multi-stage composite advanced treatment oil and gas recovery device according to claim 1, characterized in that: A second solenoid valve (11) is provided on the pipeline between the pressure stabilizing system and the inlet of the terminal deep treatment unit (19), and a sixth solenoid valve (18) is provided on the pipeline between the pressure stabilizing system and the inlet of the flexible commutator (17).

4. A multi-stage composite advanced treatment oil and gas recovery device according to claim 1, characterized in that: A third solenoid valve (14) is provided on the pipeline between the analytical vacuum pump (9) and the membrane separator (13), and a fourth solenoid valve (15) is provided on the pipeline between the analytical vacuum pump (9) and the terminal deep treatment unit (19).

5. A multi-stage composite deep treatment oil and gas recovery device according to claim 1, characterized in that: The oil-gas separator (5) is connected to the oil return port of the oil tank (20) through a first oil return pipeline, and a first solenoid valve (6) is provided on the first oil return pipeline.

6. The multi-stage composite advanced treatment oil and gas recovery equipment according to claim 1, wherein: A fifth solenoid valve (16) is provided on the pipeline between the terminal deep treatment unit (19) and the gas detector (12).

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