An aromatics oil hydrogenation device

Abstract

The utility model relates to the field of petroleum chemical industry, concretely relates to a kind of aromatic oil hydrogenation device.The aromatic oil hydrogenation device includes: new hydrogen compressor, with opposite new hydrogen import and new hydrogen export;Import pipeline, one end is connected with new hydrogen import, the other end is suitable for being connected with pipe network;Outlet pipeline, one end is connected with new hydrogen export;Check valve is arranged on outlet pipeline, and flow orifice is arranged at check valve;Flow transmitter is also arranged on outlet pipeline, and flow transmitter is arranged behind check valve along the flow direction of hydrogen.The utility model relates to a kind of aromatic oil hydrogenation device, and the pressure and flow of hydrogen can be adjusted by new hydrogen compressor and flow orifice, to adapt to the use requirement of aromatic oil hydrogenation device.

Description

Technical Field

[0001] This utility model relates to the field of petrochemicals, specifically to an aromatic oil hydrogenation device. Background Technology

[0002] Aromatic oil hydrogenation unit is a device that uses aromatic oil and hydrogen as raw materials to produce refined aromatic oil.

[0003] During the operation of aromatic oil hydrotreating units, hydrogen is piped into the unit and reacts with sulfur atoms in the aromatic oil feedstock, reducing the sulfur impurity content. However, during the design and modification of aromatic oil hydrotreating units, situations frequently arise where the design pressure of the unit does not match the hydrogen pipeline pressure, and the sulfur content of the aromatic oil feedstock during design is higher than that of the actual production feedstock, leading to a significant decrease in hydrogen consumption. This necessitates frequent operation by staff to control the hydrogen pressure and flow rate.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To improve or solve the technical problems in existing technologies where the design pressure and hydrogen pipeline pressure do not match, and the designed sulfur content of the raw material does not match the actual sulfur content of the raw material, requiring frequent manual operation and control, this utility model provides an aromatic oil hydrogenation device. The aromatic oil hydrogenation device includes: a fresh hydrogen compressor with a fresh hydrogen inlet and a fresh hydrogen outlet; an inlet pipeline, one end connected to the fresh hydrogen inlet and the other end adapted to connect to the pipeline network; an outlet pipeline, one end connected to the fresh hydrogen outlet; a check valve is installed on the outlet pipeline, and a flow-limiting orifice plate is installed at the check valve; a flow transmitter is also installed on the outlet pipeline, and the flow transmitter is arranged downstream of the check valve along the direction of hydrogen flow.

[0006] In this invention, an aromatic oil hydrogenation device is installed between the pipeline network and the device. A new hydrogen compressor is installed to pressurize the hydrogen supplied by the pipeline network, ensuring the hydrogen pressure matches the device's design pressure. A check valve is installed on the outlet pipeline, and a flow-limiting orifice plate is installed at the check valve. The check valve prevents the pressurized hydrogen from flowing back into the new hydrogen compressor, and the flow-limiting orifice plate reduces the hydrogen flow rate in the outlet pipeline, ensuring the flow rate matches the actual hydrogen flow rate required for the raw materials. Furthermore, the flow-limiting orifice plate is low-cost, has excellent erosion resistance, and a long service life. A flow transmitter is positioned downstream of the check valve to collect the hydrogen flow rate after flow restriction, providing operators with hydrogen flow information. Through these features, this aromatic oil hydrogenation device, using the new hydrogen compressor and flow-limiting orifice plate, can adjust the hydrogen pressure and flow rate to meet the operational requirements of the aromatic oil hydrogenation device.

[0007] Furthermore, the check valve includes a first check valve near the new hydrogen compressor and a second check valve away from the new hydrogen compressor, with the flow-limiting orifice plate mounted on the second check valve.

[0008] Furthermore, the flow-limiting orifice plate and the second check valve are fixedly connected by a flange structure.

[0009] Furthermore, a pressure transmitter and a field pressure gauge are installed on the outlet pipeline.

[0010] Furthermore, a temperature sensor is installed on the outlet pipeline.

[0011] Furthermore, a first valve and a second valve are installed on the inlet pipeline.

[0012] In summary, compared with the prior art, this utility model has the following beneficial effects:

[0013] A new hydrogen compressor is installed between the pipeline network and the equipment to pressurize the hydrogen transported by the pipeline network, making the hydrogen pressure match the design pressure of the equipment. A check valve is installed on the outlet pipeline, and a flow-limiting orifice plate is installed at the check valve. The check valve can prevent the pressurized hydrogen from flowing back into the new hydrogen compressor, and the flow-limiting orifice plate can reduce the hydrogen flow rate in the outlet pipeline, making the hydrogen flow rate match the actual hydrogen flow rate required for the raw materials. At the same time, the flow-limiting orifice plate has low cost, excellent erosion resistance, and long service life. Attached Figure Description

[0014] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0015] Figure 1 This is a simplified schematic diagram of an embodiment of an aromatic oil hydrogenation device according to the present invention;

[0016] Figure 2 This is a schematic diagram of an embodiment of a flow-limiting orifice plate in an aromatic oil hydrogenation device according to the present invention.

[0017] List of reference numerals in the attached diagram: 1. New hydrogen compressor; 2. Inlet pipeline; 21. First valve; 22. Second valve; 3. Outlet pipeline; 31. First check valve; 32. Second check valve; 33. Flow restrictor; 34. Flow transmitter; 35. Pressure transmitter; 36. Field pressure gauge; 37. Temperature sensor. Detailed Implementation

[0018] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] To improve or solve the technical problems in existing technologies where the design pressure and hydrogen pipeline pressure do not match, and the designed sulfur content of the raw material does not match the actual sulfur content of the raw material, requiring frequent manual operation and control, this utility model provides an aromatic oil hydrogenation device. The aromatic oil hydrogenation device includes: a new hydrogen compressor 1, with a new hydrogen inlet and a new hydrogen outlet; an inlet pipe 2, one end connected to the new hydrogen inlet, and the other end adapted to connect to the pipeline network; an outlet pipe 3, one end connected to the new hydrogen outlet; a check valve is installed on the outlet pipe 3, and a flow-limiting orifice plate 33 is installed at the check valve; a flow transmitter 34 is also installed on the outlet pipe 3, and the flow transmitter 34 is arranged downstream of the check valve along the hydrogen flow direction.

[0022] In this article, unless otherwise stated, the terms “front” and “rear” refer to the direction in which hydrogen flows.

[0023] Figure 1 This is a simplified schematic diagram of an embodiment of an aromatic oil hydrogenation device according to this utility model. Figure 1 As shown, in one or more embodiments, the aromatic oil hydrogenation device of this utility model includes a new hydrogen compressor 1, an inlet pipe 2, and an outlet pipe 3. The new hydrogen compressor 1 has a new hydrogen inlet and a new hydrogen outlet. One end of the inlet pipe 2 is connected to the new hydrogen inlet of the new hydrogen compressor 1, and the other end is connected to a hydrogen pipeline network. One end of the outlet pipe 3 is connected to the new hydrogen outlet of the new hydrogen compressor 1, and the other end is connected to a reactor. Hydrogen and aromatic oil feedstock react in the reactor.

[0024] Figure 2 This is a schematic diagram of an embodiment of a flow-limiting orifice plate in an aromatic oil hydrogenation device according to this utility model. Figure 1 and Figure 2As shown, in one or more embodiments, a first valve 21 and a second valve 22 are provided on the inlet pipe 2, and the first valve 21 and the second valve 22 are arranged in series. Further, a check valve is provided on the outlet pipe 3. Specifically, the check valve includes a first check valve 31 and a second check valve 32, which are arranged in series to prevent hydrogen from flowing back to the new hydrogen compressor 1. The first check valve 31 is close to the new hydrogen compressor 1, and the second check valve 32 is away from the new hydrogen compressor 1. Further, a flow-limiting orifice plate 33 is provided on the check valve. Specifically, the flow-limiting orifice plate 33 is arranged in front of the second check valve 32. The second check valve 32 is connected to the outlet pipe via a flange structure. A flange hole is provided on the flow-limiting orifice plate 33, and the flow-limiting orifice plate 33, the second check valve 32, and the pipe are fixedly connected by the flange. Based on the sulfur content of the raw materials and the required sulfur content of the product, the pre-consumption of hydrogen in the device is calculated, and the hourly hydrogen consumption is obtained. The flow-limiting orifice plate 33 is selected based on the consumption.

[0025] See Figure 1 In one or more embodiments, a flow transmitter 34 is provided on the outlet pipeline 3 to detect the flow rate of hydrogen in the outlet pipeline 3. Specifically, a third measuring pipeline is provided on the outlet pipeline 3, the flow transmitter 34 is installed on the third measuring pipeline, and a valve is provided between the flow transmitter 34 and the outlet pipeline 3. The third measuring pipeline is located downstream of a second check valve 32. Further, a pressure transmitter 35 and a field pressure gauge 36 are provided on the outlet pipeline 3, both of which detect the pressure of the outlet pipeline 3, and the pressure transmitter 35 transmits the detection result to the control room. Specifically, a first measuring pipeline and a second measuring pipeline are provided on the outlet pipeline 3, the field pressure gauge 36 is installed on the first measuring pipeline, and a valve is provided between the field pressure gauge 36 and the outlet pipeline 3. The pressure transmitter 35 is installed on the second measuring pipeline, and a valve is provided between the pressure transmitter 35 and the outlet pipeline 3. The first measuring line is located downstream of the second check valve 32, the second measuring line is located downstream of the first measuring line, and the third measuring line is located downstream of the second measuring line. Further, a temperature sensor 37 is installed on the outlet line 3 to detect the temperature of the outlet line 3. Specifically, a fourth measuring line is installed on the outlet line 3, located downstream of the third measuring line. The temperature sensor 37 is installed on the fourth measuring line, and a valve is installed between the temperature sensor 37 and the outlet line 3.

[0026] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An aromatic oil hydrogenation device, characterized in that, include: The new hydrogen compressor (1) has a relative new hydrogen inlet and a new hydrogen outlet; The inlet pipeline (2) is connected at one end to the new hydrogen inlet and at the other end to the pipeline network. An outlet pipe (3) is connected at one end to the new hydrogen outlet; a check valve is provided on the outlet pipe (3), and a flow limiting orifice plate (33) is provided at the check valve; a flow transmitter (34) is also provided on the outlet pipe (3), and the flow transmitter (34) is arranged behind the check valve along the flow direction of hydrogen.

2. The aromatic oil hydrogenation apparatus according to claim 1, characterized in that, The check valve includes a first check valve (31) near the new hydrogen compressor (1) and a second check valve (32) away from the new hydrogen compressor (1), and the flow limiting orifice plate (33) is mounted on the second check valve (32).

3. The aromatic oil hydrogenation apparatus according to claim 2, characterized in that, The flow-limiting orifice plate (33) and the second check valve (32) are fixedly connected by a flange structure.

4. The aromatic oil hydrogenation apparatus according to claim 1, characterized in that, A pressure transmitter (35) and a field pressure gauge (36) are installed on the outlet pipeline (3).

5. An aromatic oil hydrogenation apparatus according to claim 1, characterized in that, A temperature sensor (37) is installed on the outlet pipe (3).

6. The aromatic oil hydrogenation apparatus according to claim 1, characterized in that, A first valve (21) and a second valve (22) are provided on the inlet pipe (2).

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