Storage tank oil gas recovery system

Abstract

The utility model relates to the field of storage tank oil gas treatment, and particularly discloses a storage tank oil gas recovery system which is characterized in that an input port of a first pipeline is communicated with a naphtha tank area, an output port is communicated with an input port of a booster fan, an output port of the booster fan is communicated with an input port of a second pipeline, and an output port of the second pipeline is communicated with an input port of a three-way electromagnetic valve; a first output port of the three-way electromagnetic valve is communicated with the asphalt heating atmospheric pressure furnace through a third pipeline, and a second output port is communicated with the asphalt heating vacuum furnace through a fourth pipeline; a first flowmeter is arranged on the first pipeline, a second flowmeter and a first switch electromagnetic valve are arranged on the third pipeline, and a third flowmeter and a second switch electromagnetic valve are arranged on the fourth pipeline. Oil gas in the storage tank can enter the asphalt heating atmospheric pressure furnace or the asphalt heating vacuum furnace to be combusted according to conditions, so that the flexibility of oil gas treatment is improved, real-time sufficient combustion of VOCs in the oil gas is guaranteed, and environmental pollution is avoided.

Description

Technical Field

[0001] The utility model relates to the field of oil and gas processing in storage tanks, and in particular to an oil and gas recovery system in storage tanks. Background Art

[0002] Volatile organic compounds are generated during the storage of oil and gas in the tank area, which are rich in a large number of VOCs light hydrocarbon components. If not handled in time, it will cause environmental pollution. Commonly used VOCs waste gas treatment methods include condensation, absorption, adsorption, biological, catalytic oxidation, combustion, etc. VOCs in oil and gas usually use adsorption and catalytic oxidation processes, but the cost is high and the safety is poor. In recent years, the use of combustion methods to treat VOCs in oil and gas has emerged. However, if only a combustion system is configured, the cost will increase and cause waste of resources. Therefore, it can be recycled as a material for other combustion systems, but the existing storage tank oil and gas combustion recovery system usually only enters a single heating furnace for incineration, which has the defect of combustion limitations and cannot ensure the combustion of VOCs when the heating furnace fails. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a storage tank oil and gas recovery system. The storage tank oil and gas can enter the asphalt heating atmospheric pressure furnace or the asphalt heating reduced pressure furnace for combustion according to the situation, thereby improving the flexibility of oil and gas treatment, ensuring the real-time and sufficient combustion of VOCs in the oil and gas, and avoiding environmental pollution.

[0004] The technical solution of the utility model is: a tank oil and gas recovery system, comprising a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a booster fan, and a three-way solenoid valve;

[0005] The input port of the first pipeline is connected to the naphtha tank area, the output port is connected to the input port of the booster fan, the output port of the booster fan is connected to the input port of the second pipeline, the output port of the second pipeline is connected to the input port of the three-way solenoid valve, the first output port of the three-way solenoid valve is connected to the asphalt heating atmospheric pressure furnace via the third pipeline, and the second output port is connected to the asphalt heating reduced pressure furnace via the fourth pipeline; a first flow meter is arranged on the first pipeline, a second flow meter and a first switch solenoid valve are arranged on the third pipeline, and a third flow meter and a second switch solenoid valve are arranged on the fourth pipeline;

[0006] When the oil and gas in the storage tank enters the asphalt heating and pressure reducing furnace, the first switch solenoid valve is turned off, and the first switch solenoid valve is replaced with a blind plate for isolation; when the oil and gas in the storage tank enters the asphalt heating and pressure furnace, the second switch solenoid valve is turned off, and the second switch solenoid valve is replaced with a blind plate for isolation;

[0007] The three-way solenoid valve, the first flow meter, the second flow meter, the third flow meter, the first switch solenoid valve, the second switch solenoid valve, and the additional fan are electrically connected to the distributed control system respectively.

[0008] In an optional embodiment, a first flame arrester is further provided on the first pipeline.

[0009] In an optional implementation, a third switch solenoid valve is further provided on the second pipeline.

[0010] In an optional embodiment, a second flame arrester is further provided on the second pipeline.

[0011] In an optional embodiment, a first pressure sensor is also provided on the third pipeline.

[0012] In an optional embodiment, a second pressure sensor is further provided on the fourth pipeline.

[0013] The utility model provides a tank oil and gas recovery system, which has the following beneficial effects compared with the prior art: (1) a three-way solenoid valve and a third pipeline and a fourth pipeline are provided, and the oil and gas are led out and then introduced into the third pipeline or the fourth pipeline through the three-way solenoid valve, and then enter the asphalt heating atmospheric pressure furnace or the asphalt heating reduced pressure furnace for combustion. The asphalt heating atmospheric pressure furnace or the asphalt heating reduced pressure furnace can be selected for combustion according to the operation status of the heating furnace, thereby improving the flexibility of oil and gas treatment, ensuring the real-time and full combustion of VOCs in the oil and gas, and avoiding environmental pollution; (2) a first flow meter is provided on the first pipeline, and the oil and gas flow can also be selected to enter the atmospheric pressure furnace or the reduced pressure furnace according to the oil and gas flow rate, thereby ensuring the full combustion of the oil and gas; (3) a flow meter and a switch solenoid valve are provided on the third pipeline and the fourth pipeline, so that when the pipeline is shut down, the switch solenoid valve is replaced with a partition to isolate the oil and gas, thereby ensuring the effectiveness of the oil and gas isolation and avoiding oil and gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The utility model provides a schematic diagram of the structure of a tank oil and gas recovery system.

[0016] In the figure, 1-boost fan, 2-third switch solenoid valve, 3-second flame arrester, 4-second switch solenoid valve, 5-first switch solenoid valve, 6-asphalt heating pressure reducing furnace, 7-asphalt heating normal pressure furnace, 8-second pipeline, 9-first flame arrester, 10-naphtha tank area, 11-first pipeline, 12-first flow meter, 13-third pipeline, 14-first pressure sensor, 15-second flow meter, 16-three-way solenoid valve, 17-fourth pipeline, 18-second pressure sensor, 19-third flow meter. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following implementation modes.

[0018] like Figure 1 As shown, an oil and gas recovery system for a storage tank provided by an embodiment of the utility model includes a first pipeline 11 , a second pipeline 8 , a third pipeline 13 , a fourth pipeline 17 , a booster fan 1 , and a three-way solenoid valve 16 .

[0019] The input port of the first pipeline 11 is connected to the naphtha tank area 10, and the output port is connected to the input port of the booster fan 1, the output port of the booster fan 1 is connected to the input port of the second pipeline 8, the output port of the second pipeline 8 is connected to the input port of the three-way solenoid valve 16, the first output port of the three-way solenoid valve 16 is connected to the asphalt heating atmospheric pressure furnace 7 via the third pipeline 13, and the second output port is connected to the asphalt heating reduced pressure furnace 6 via the fourth pipeline 17, the oil and gas of the naphtha tank area 10 are output to the asphalt heating atmospheric pressure furnace 7 or the asphalt heating reduced pressure furnace 6 for combustion, which not only realizes the treatment of VOCs to avoid environmental pollution, but also effectively utilizes resources and reduces the heating cost of the asphalt device.

[0020] Among them, the first flow meter 12 is arranged on the first pipeline 11, the second flow meter 15 and the first switch solenoid valve 5 are arranged on the third pipeline 13, and the third flow meter 19 and the second switch solenoid valve 4 are arranged on the fourth pipeline 17. The three-way solenoid valve 16, the first flow meter 12, the second flow meter 15, the third flow meter 19, the first switch solenoid valve 5, the second switch solenoid valve 4, and the additional fan are electrically connected to the distributed control system respectively.

[0021] The three-way solenoid valve 16 is electrically connected to the distributed control system (DCS system for short). The staff can select which heating furnace the oil and gas should be transported to according to the operation of the atmospheric furnace 7 and the reduced pressure furnace 6, and then control the opening and closing of the output port of the three-way solenoid valve 16 through the DCS system. For example, under normal circumstances, the first output port of the three-way solenoid valve 16 is opened, and the first switch solenoid valve 5 is opened accordingly, and the oil and gas enter the atmospheric furnace 7; if the atmospheric furnace 7 is abnormal, the second output port of the three-way solenoid valve 16 is opened, and the corresponding second switch solenoid valve 4 is opened, and the oil and gas enter the reduced pressure furnace 6, to ensure the real-time and full combustion of the oil and gas.

[0022] In this embodiment, a first flow meter 12 is provided on the first pipeline 11, and the DSC system can control which heating furnace the oil and gas enters according to the oil and gas flow rate. For example, when the oil and gas flow rate is low within a certain period of time, the oil and gas enter the reduced pressure furnace 6, and when the oil and gas flow rate is high within a certain period of time, the oil and gas enter the normal pressure furnace 7, so as to ensure sufficient combustion of the oil and gas.

[0023] After the third pipeline 13 or the fourth pipeline 17 is shut off, in order to ensure that the oil and gas leaks to the pipeline after the shutoff, the second flow meter 15 and the first switch solenoid valve 5 are set on the third pipeline 13, and the third flow meter 19 and the second switch solenoid valve 4 are set on the fourth pipeline 17. When the oil and gas in the storage tank enter the asphalt heating pressure reducing furnace 6, the first switch solenoid valve 5 is shut off, and the first switch solenoid valve 5 is replaced with a blind plate for isolation; when the oil and gas in the storage tank enter the asphalt heating pressure furnace, the second switch solenoid valve 4 is shut off, and the second switch solenoid valve 4 is replaced with a blind plate for isolation. In addition, a first pressure sensor 14 is set on the third pipeline 13, and a second pressure sensor 18 is set on the fourth pipeline 17. When replacing the blind plate, the flow meter and pressure sensor on the pipeline are used to detect the oil and gas state in the pipeline. When the flow rate and pressure are both less than the corresponding threshold value, the switch solenoid valve is shut off, and the power is turned off to replace the blind plate.

[0024] In this embodiment, a first flame arrester 9 is further provided on the first pipeline 11, and a second flame arrester 3 is further provided on the second pipeline 8 to prevent oil and gas from flashing back. A third switch solenoid valve 2 is also provided on the second pipeline 8, which can cut off the material by emergency closing, for example, by emergency closing through SIS interlocking.

[0025] In the specific implementation example, the pipeline is provided with heating and insulation throughout the whole process, and the oil and gas recovery system is provided with SIS system interlocking. During normal operation, the oil and gas entering the heating furnace can be transported intermittently.

[0026] The above disclosure is only the preferred implementation mode of the utility model, but the utility model is not limited thereto. Any non-creative changes that can be thought of by technicians in this field, as well as several improvements and modifications made without departing from the principle of the utility model, should fall within the scope of protection of the utility model.

Claims

1. A tank oil and gas recovery system, characterized in that: It includes a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a booster fan, and a three-way solenoid valve; The input port of the first pipeline is connected to the naphtha tank area, the output port is connected to the input port of the booster fan, the output port of the booster fan is connected to the input port of the second pipeline, the output port of the second pipeline is connected to the input port of the three-way solenoid valve, the first output port of the three-way solenoid valve is connected to the asphalt heating atmospheric pressure furnace via the third pipeline, and the second output port is connected to the asphalt heating reduced pressure furnace via the fourth pipeline; a first flow meter is arranged on the first pipeline, a second flow meter and a first switch solenoid valve are arranged on the third pipeline, and a third flow meter and a second switch solenoid valve are arranged on the fourth pipeline; When the oil and gas in the storage tank enters the asphalt heating and pressure reducing furnace, the first switch solenoid valve is turned off, and the first switch solenoid valve is replaced with a blind plate for isolation; when the oil and gas in the storage tank enters the asphalt heating and pressure furnace, the second switch solenoid valve is turned off, and the second switch solenoid valve is replaced with a blind plate for isolation; The three-way solenoid valve, the first flow meter, the second flow meter, the third flow meter, the first switch solenoid valve, the second switch solenoid valve, and the additional fan are electrically connected to the distributed control system respectively.

2. The tank oil and gas recovery system according to claim 1, characterized in that: A first flame arrester is also arranged on the first pipeline.

3. The tank oil and gas recovery system according to claim 2, characterized in that: A third switch solenoid valve is also arranged on the second pipeline.

4. The tank oil and gas recovery system according to claim 3, characterized in that: A second flame arrester is also arranged on the second pipeline.

5. The tank oil and gas recovery system according to claim 4, characterized in that: A first pressure sensor is also arranged on the third pipeline.

6. The tank oil and gas recovery system according to claim 5, characterized in that: A second pressure sensor is also arranged on the fourth pipeline.

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