High-efficiency continuous oil recovery device

Abstract

The invention provides an efficient continuous oil recovery device which comprises a buffer tank, the upper end of the buffer tank is fixedly connected with a waste gas outlet pipe, the interior of the buffer tank is fixedly connected with an inner pipe, the lower end of the inner pipe extends to the bottom of the buffer tank, and the waste gas outlet pipe is independently communicated with the upper end of the inner pipe; the other end of the waste gas outlet pipe is fixedly connected with a collecting tank, the upper end of the buffer tank is communicated with a bypass pipe, the other end of the bypass pipe is connected with the waste gas outlet pipe, the bypass pipe is provided with a first throttling valve, and the side wall of the lower portion of the buffer tank is fixedly connected with a waste gas inlet pipe. The side wall of the upper portion of the buffer tank is fixedly connected with a nitrogen inlet pipe, and a second throttling valve is arranged on the nitrogen inlet pipe. According to the device, the inner pipe is arranged in the buffer tank, oil can be discharged out of the buffer tank, and stable operation of the device is guaranteed through the arrangement of the inner pipe and a related pressure stabilizing structure.

Description

Technical Field

[0001] The invention relates to the technical field of chemical gas-liquid separation, and in particular to a high-efficiency continuous oil product recovery device. Background Art

[0002] During the chemical production process, toxic and harmful organic gases are generated, which need to be treated harmlessly. Different chemical production links produce different types of gases, and the amount of organic waste gas generated is relatively small. In the case of complex components and small amounts, it will not be recycled and reused, and basically an elevated torch is used for full combustion treatment.

[0003] In the existing treatment schemes, most organic gases are passed into a buffer tank, where oil and liquid are separated, and the oil is sent out from the bottom of the buffer tank. In this treatment method, if the buffer tank continues to discharge oil, it is very easy to cause organic waste gas to be discharged along with the oil during the process, causing harm. If the oil is stored in the buffer tank for a certain amount before being discharged, the volume used for buffering in the buffer tank will be reduced, which is not conducive to gas buffering. The increase and decrease of gas pressure is not conducive to the continuous and stable combustion of the elevated flare, and incomplete combustion will cause environmental pollution. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses an efficient and continuous oil recovery device, including a buffer tank, the upper end of the buffer tank is fixedly connected with an exhaust gas outlet pipe, the interior of the buffer tank is fixedly connected with an inner tube, and the lower end of the inner tube extends to the bottom of the buffer tank, the exhaust gas outlet pipe and the upper end of the inner tube are separately connected, and the other end of the exhaust gas outlet pipe is fixedly connected with a collecting tank. An internal is provided inside the buffer tank, and the oil produced in the buffer tank is sent to the collecting tank for temporary storage under the action of air pressure as much as possible. Compared with the traditional treatment method, the volume of the buffer tank will basically not change, and the exhaust gas is sent to the elevated torch for combustion, and its air pressure is relatively stable, which ensures the stable combustion of the exhaust gas. At the same time, the collection tank can store more oil, which can extend the oil discharge cycle and reduce the possibility of exhaust gas being discharged with the oil.

[0005] The upper end of the buffer tank is connected to a bypass pipe, the other end of the bypass pipe is connected to the exhaust gas outlet pipe, the bypass pipe is provided with a first throttle valve, the lower side wall of the buffer tank is fixedly connected to the exhaust gas inlet pipe, the upper side wall of the buffer tank is fixedly connected to the nitrogen inlet pipe, and the nitrogen inlet pipe is provided with a second throttle valve. Chemical waste gas is sent into the buffer tank from the waste gas inlet pipe. When the internal pressure in the buffer tank increases, the first throttle valve can be adjusted to make the bypass pipe directly conductive, that is, the waste gas directly enters the exhaust gas exhaust pipe without passing through the inner pipe. If the internal pressure of the buffer tank decreases, the second throttle valve is adjusted to inject nitrogen into the collection tank to ensure that the internal pressure of the buffer tank is normal and to avoid the pressure reduction that makes the oil unable to be pressed out from the inner pipe. The structure ensures the stable operation of the buffer tank.

[0006] Preferably, a monitoring port is provided in the middle of the side wall of the buffer tank, and a pressure sensor is fixedly connected to the monitoring port. The pressure sensor is a barometric pressure sensor, which is used to monitor the internal pressure of the buffer tank, thereby regulating the first throttle valve and the second throttle valve.

[0007] Preferably, the side wall of the collection tank is provided with a liquid level tube, and the lower side wall of the collection tank is fixedly connected with an oil drain pipe. The liquid level tube is used to observe the amount of oil in the collection tank, and a liquid level gauge is correspondingly provided inside the collection tank to facilitate monitoring by the host computer, while the oil drain pipe is used to drain the oil, and when the oil drain operation is not performed, the valve on the oil drain pipe remains in a closed state.

[0008] Preferably, the buffer tank is fixedly connected with a plurality of support plates, and the support plates are provided with through holes, and the inner tube passes through the support plates. The support plates are provided to improve the structural strength of the buffer tank, and at the same time support and fix the inner tube to avoid separation of the inner tube and the buffer tank due to vibration, thermal expansion and contraction.

[0009] Preferably, a reserved pipeline is fixedly connected to the middle of the lower end of the buffer tank, and a normally closed valve is arranged on the reserved pipeline, which is a reserved processing pipeline for emergencies in the buffer tank.

[0010] Preferably, a plurality of support legs are fixedly connected to the lower end of the buffer tank, and the support legs are used to support and fix the buffer tank.

[0011] Furthermore, a pipe is connected to one side of the upper end of the collecting tank, and the exhaust gas outlet pipe is sent into the oil-liquid mixture of the collecting tank for separation. The oil is deposited at the bottom of the collecting tank, and the exhaust gas is passed through a preset pipe on the upper part into the elevated flare for combustion purification treatment. At the same time, the collecting tank also has a buffering effect.

[0012] The beneficial effects of the present invention are as follows: 1. An inner tube is provided in the buffer tank, and the lower end of the inner tube extends to the bottom of the buffer tank. During the exhaust gas treatment process, the oil produced therein will also be pressed out with the gas by the inner tube, ensuring the constant volume of the buffer tank and the buffering effect.

[0013] 2. A bypass pipe and a nitrogen inlet pipe are provided, and a first throttle valve and a second throttle valve are provided thereon. When the internal pressure of the buffer tank decreases, the second throttle valve is used for regulation to introduce sufficient nitrogen. If the internal pressure of the buffer tank increases, the first throttle valve is used for regulation to quickly discharge the excess gas in the buffer tank. In the above, the internal pressure of the buffer tank can be stabilized, thereby ensuring the stable operation of the overall device and the stable combustion of the elevated flare.

[0014] 3. A collection tank is provided. Multiple buffer tanks can be connected to the collection tank as needed, so that the centralized storage and discharge of oil can be realized, and the oil processing efficiency is improved. At the same time, the collection tank will also play the role of a buffer tank to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the principle of the present invention; Figure 2 It is a three-dimensional schematic diagram of a buffer tank of the present invention; Figure 3 It is a cross-sectional schematic diagram of the buffer tank of the present invention.

[0016] List of reference numerals: 1. Buffer tank; 2. Reserved pipeline; 3. Waste gas inlet pipe; 4. Collection tank; 5. Liquid level pipe; 6. Oil drain pipe; 7. Elevated flare; 8. First throttle valve; 9. Bypass pipe; 10. Second throttle valve; 11. Nitrogen inlet pipe; 12. Waste gas outlet pipe; 13. Support leg; 14. Monitoring port; 15. Inner pipe; 16. Support plate. DETAILED DESCRIPTION

[0017] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0018] like Figures 1 to 3 As shown, an efficient and continuous oil recovery device includes a buffer tank 1. The buffer tank 1 is cylindrical, and the upper and lower ends are both hemispherical. The upper end of the buffer tank 1 is fixedly connected to an exhaust gas outlet pipe 12 to discharge the exhaust gas inside the buffer tank 1. The inside of the buffer tank 1 is fixedly connected to an inner tube 15, and the lower end of the inner tube 15 extends to the bottom of the buffer tank 1. During the exhaust gas treatment process, oil will accumulate in the buffer tank 1. In the traditional way, the oil is sent out from the bottom of the buffer tank 1, basically after accumulating to a certain amount, it is discharged. Here, the buffer volume of the buffer tank 1 is The inner tube 15 provided in the buffer tank 1 can discharge the generated oil together with the exhaust gas, and keep the container of the buffer tank 1 unchanged to ensure the buffering effect. The exhaust gas outlet pipe 12 and the upper end of the inner tube 15 are separately connected, and the other end of the exhaust gas outlet pipe 12 is fixedly connected with a collecting tank 4, which is used for temporarily storing the oil, which is beneficial to the large-scale collection and storage of the oil. At the same time, the collecting tank 4 also has a buffering effect to a certain extent.

[0019] The upper end of the buffer tank 1 is connected with a bypass pipe 9, which is directly connected to the buffer tank 1 and can directly enter and discharge the exhaust gas inside the buffer tank 1. The other end of the bypass pipe 9 is connected to the exhaust gas outlet pipe 12, and the exhaust gas sent out from the bypass pipe 9 is sent into the exhaust gas outlet pipe 12. The bypass pipe 9 is provided with a first throttle valve 8. The pressure value of the buffer tank 1 is set to 0.2MPa. When the pressure mutation in the buffer tank 1 is not less than 0.3MPa, the first throttle valve 8 opens, and the flow rate of the first throttle valve 8 is adjusted according to the pressure change of the buffer tank 1 to ensure the stability of the pressure subsequently sent to the elevated flare 7. The lower side wall of the buffer tank 1 is fixedly connected with an exhaust gas inlet pipe 3, and the exhaust gas is sent into the pressure tank 1 through an air compressor. The pressure value set here is The maximum rated pressure delivered by the air compressor is 0.25MPa, and the bypass pipe 9 is set to protect the air compressor and avoid damage caused by exhaust gas recoil. The upper side wall of the buffer tank 1 is fixedly connected with a nitrogen inlet pipe 11. The delivery pressure set by the nitrogen inlet pipe 11 is 0.65MPa. The nitrogen inlet pipe 11 is used to balance the pressure inside the buffer tank 1 and provide a boost when the internal pressure of the buffer tank 1 decreases. For example, the exhaust gas delivered by the air compressor decreases, the pressure of the buffer tank 1 decreases, and the nitrogen flushed into the nitrogen inlet pipe 11 stabilizes the pressure of the buffer tank 1. A second throttle valve 10 is provided on the nitrogen inlet pipe 11, that is, the opening degree of the second throttle valve 10 is adjusted by the pressure in the buffer tank 1 to control the flow of nitrogen.

[0020] A monitoring port 14 is provided in the middle of the side wall of the buffer tank 1, and a pressure sensor is fixedly connected to the monitoring port 14. The pressure sensor is used to monitor the internal pressure of the buffer tank 1 and provide a control basis for the regulation of the first throttle valve 8 and the second throttle valve 10. At the same time, the type of the pressure sensor is an air pressure sensor.

[0021] A liquid level tube 5 is provided on the side wall of the collecting tank 4 for obtaining the oil storage amount of the liquid level tube 5. At the same time, a liquid level meter is provided inside the collecting tank 4 to send the oil amount to the host computer in the form of an electrical signal. An oil drain pipe 6 is fixedly connected to the lower side wall of the collecting tank 4 to drain the oil in the collecting tank 4. Depending on the speed at which the oil is produced, the oil can be drained continuously or periodically.

[0022] Furthermore, in chemical production, waste gas is generated in multiple links, and multiple buffer tanks 1 will be set up as needed. If the oil is directly discharged from the buffer tank 1, the oil will not be concentrated, the subsequent processing cost will increase, and the corresponding risk will also increase. If a collection tank 4 is set up, all the oil can be processed in a centralized manner, ensuring efficient processing of the oil.

[0023] A plurality of support plates 16 are fixedly connected to the interior of the buffer tank 1. The support plates 16 are provided to improve the structural strength of the buffer tank 1. Through holes are provided on the support plates 16 to ensure internal connectivity of the buffer tank 1. The inner tube 15 passes through the support plates 16. The support plates 16 also support and fix the inner tube 15 to improve the structural stability of the inner tube 15.

[0024] A reserved pipe 2 is fixedly connected to the middle of the lower end of the buffer tank 1, and a normally closed valve is provided on the reserved pipe 2. In the traditional oil discharge method, the generated oil is discharged from the reserved pipe 2. The reserved pipe 2 is provided here to deal with emergencies of the buffer tank 1 and ensure normal production.

[0025] The lower end of the buffer tank 1 is fixedly connected with a plurality of support legs 13. The support legs 13 support and fix the tank body 1, and a rectangular pad is arranged at the lower end of the support legs 13, and a through hole is arranged on the pad to facilitate fixing.

[0026] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. An efficient and continuous oil recovery device, characterized in that: The invention comprises a buffer tank (1), wherein the upper end of the buffer tank (1) is fixedly connected to an exhaust gas outlet pipe (12), the interior of the buffer tank (1) is fixedly connected to an inner pipe (15), and the lower end of the inner pipe (15) extends to the bottom of the buffer tank (1), the exhaust gas outlet pipe (12) and the upper end of the inner pipe (15) are independently connected, and the other end of the exhaust gas outlet pipe (12) is fixedly connected to a collecting tank (4); The upper end of the buffer tank (1) is connected to a bypass pipe (9), the other end of the bypass pipe (9) is connected to an exhaust gas outlet pipe (12), a first throttle valve (8) is provided on the bypass pipe (9), an exhaust gas inlet pipe (3) is fixedly connected to the lower side wall of the buffer tank (1), a nitrogen inlet pipe (11) is fixedly connected to the upper side wall of the buffer tank (1), and a second throttle valve (10) is provided on the nitrogen inlet pipe (11).

2. The oil product efficient continuous recovery device according to claim 1, characterized in that: A monitoring port (14) is provided in the middle of the side wall of the buffer tank (1), and a pressure sensor is fixedly connected to the monitoring port (14).

3. The oil product efficient continuous recovery device according to claim 1 is characterized in that: A liquid level pipe (5) is provided on the side wall of the collecting tank (4), and an oil drain pipe (6) is fixedly connected to the lower side wall of the collecting tank (4).

4. The oil product efficient continuous recovery device according to claim 1 is characterized by: A plurality of support plates (16) are fixedly connected to the interior of the buffer tank (1), and the support plates (16) are provided with through holes, through which the inner tubes (15) pass.

5. The oil product efficient continuous recovery device according to claim 1 is characterized by: A reserved pipeline (2) is fixedly connected to the middle portion of the lower end of the buffer tank (1), and a normally closed valve is provided on the reserved pipeline (2).

6. The oil product efficient continuous recovery device according to claim 1 is characterized by: A plurality of supporting legs (13) are fixedly connected to the lower end of the buffer tank (1).

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