System for controlling blending hydrogenation crude gasoline proportion of reforming device

Abstract

The utility model belongs to the technical field of petrochemical engineering, and particularly provides a system for controlling the blending hydrogenation crude gasoline proportion of a reforming device, which comprises a normal pressure naphtha control pipeline, a hydrogenation crude gasoline control pipeline, a raw material buffer tank, a gasoline mixing unit, a liquid level controller I and a liquid level controller II, the problems that a traditional blending mode is not timely in adjustment, poor in precision, poor in reforming reaction effect, unstable in product quality and increased in equipment operation risk are solved, the liquid level in the raw material buffer tank is accurately, stably and effectively adjusted and controlled, and a solid guarantee is provided for efficient and stable operation of the device and improvement of the product quality.

Description

Technical Field

[0001] This utility model belongs to the field of petrochemical technology, specifically relating to a system for controlling the proportion of crude gasoline blended and hydrogenated in a reforming unit. Background Technology

[0002] With the development of the petrochemical industry, reforming units play an important role in improving gasoline octane number and producing aromatics. Hydrogenated crude gasoline, as a usable feedstock, is characterized by its low content of unsaturated hydrocarbons and harmful impurities, making it an ideal feedstock for reforming. Proper blending of this gasoline can optimize the efficiency of the reforming unit. Different blending ratios have a significant impact on the reaction process, product yield, and product quality, especially the product octane number.

[0003] However, traditional blending methods often rely on manual experience in large tanks in tank farms for mixing and adjustment, which has problems such as untimely adjustment and poor precision. It lacks accuracy and flexibility, making it difficult to adapt to complex and ever-changing working conditions and product quality requirements. This can easily lead to problems such as poor reforming reaction effect, unstable product quality, and increased equipment operation risks.

[0004] Chinese patent document CN1454971A discloses a method for reducing the sulfur content of catalytic cracking gasoline. The method involves connecting the top circulating oil return line of the catalytic cracking fractionation tower to the catalytic diesel output line, adding the top circulating oil of the catalytic cracking fractionation tower to the catalytic diesel at an amount of 15-25%W of the total catalytic gasoline. This diesel is then fed into a catalytic diesel hydrorefining unit for hydrorefining treatment, obtaining hydrotreated crude gasoline with a dry point controlled at 158°C. This crude gasoline is then used as feedstock for catalytic reforming to obtain high-octane reformed gasoline. This document effectively solves the problem of high sulfur content in catalytic cracking gasoline and improves the diesel-to-gasoline ratio and the yield of high-octane gasoline in the catalytic unit. However, it does not address the problems of untimely adjustment and poor precision in existing blending methods, which can easily lead to poor reforming reaction effects, unstable product quality, and increased equipment operating risks. Utility Model Content

[0005] This utility model provides a system for controlling the proportion of hydrogenated crude gasoline in a reforming unit. The purpose is to overcome the problems of untimely and inaccurate adjustment in traditional blending methods, which can easily lead to poor reforming reaction results, unstable product quality, and increased equipment operation risks.

[0006] Therefore, this utility model provides a system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit, including an atmospheric naphtha control pipeline, a hydrotreated crude gasoline control pipeline, a feedstock buffer tank, a gasoline mixing unit, a level controller one, and a level controller two. The level monitoring end of the feedstock buffer tank is electrically connected to the signal receiving end of level controller one and the signal receiving end of level controller two, respectively. The execution end of level controller one is electrically connected to the atmospheric naphtha control pipeline, and the execution end of level controller two is electrically connected to the hydrotreated crude gasoline control pipeline. The outlets of the atmospheric naphtha control pipeline and the hydrotreated crude gasoline control pipeline are both connected to the inlet of the gasoline mixing unit, and the outlet of the gasoline mixing unit is connected to the inlet of the feedstock buffer tank.

[0007] Preferably, the atmospheric pressure naphtha control pipeline includes a flow controller, a flow transmitter, and a pneumatic regulating valve. The flow transmitter and the pneumatic regulating valve are connected in series. The level controller is electrically connected to the flow transmitter through the flow controller. The actuator of the flow controller is connected to the actuator of the pneumatic regulating valve.

[0008] Preferably, the atmospheric pressure naphtha control pipeline further includes valve one and valve two, with flow transmitter one, valve one, pneumatic regulating valve one and valve two connected in series.

[0009] Preferably, the atmospheric pressure naphtha control pipeline further includes valve three and valve four, with valve three, flow transmitter one, valve four and valve one connected in series in sequence.

[0010] Preferably, the atmospheric pressure naphtha control pipeline further includes a secondary line valve one, and valve three, flow transmitter one and valve four are connected in parallel to the secondary line valve one.

[0011] Preferably, the atmospheric pressure naphtha control pipeline further includes a secondary line valve two, with valve one, pneumatic regulating valve one, and valve two connected in parallel to the secondary line valve two.

[0012] Preferably, the hydrogenated crude gasoline control pipeline includes a flow controller II, a flow transmitter II, and a pneumatic regulating valve II. The flow transmitter II and the pneumatic regulating valve II are connected in series. The level controller II is electrically connected to the flow transmitter II through the flow controller II. The actuator of the flow controller II is connected to the actuator of the pneumatic regulating valve II.

[0013] Preferably, the hydrogenated crude gasoline control pipeline further includes valve five and valve six, with flow transmitter two, valve five, pneumatic regulating valve two and valve six connected in series.

[0014] Preferably, the hydrogenated crude gasoline control pipeline further includes valve seven and valve eight, with valve seven, flow transmitter two, valve eight and valve five connected in series.

[0015] Preferably, the hydrogenated crude gasoline control pipeline further includes a secondary line valve three, and valve seven, flow transmitter two, and valve eight are connected in parallel to the secondary line valve three.

[0016] The beneficial effects of this utility model are:

[0017] 1. The system provided by this utility model for controlling the blending ratio of hydrotreated crude gasoline in a reforming unit delivers atmospheric naphtha to the gasoline blending unit via an atmospheric naphtha control pipeline and hydrotreated crude gasoline to the gasoline blending unit via a hydrotreated crude gasoline control pipeline. After mixing in the gasoline blending unit, the atmospheric naphtha and hydrotreated crude gasoline are transported to the feedstock buffer tank. Level controller 1 and level controller 2 select and control the atmospheric naphtha control pipeline and / or the hydrotreated crude gasoline control pipeline according to the liquid level in the feedstock buffer tank, thereby achieving precise, stable and effective control of the liquid level in the feedstock buffer tank. Based on the temperature drop data of the reforming reactor and the product analysis results, this utility model adjusts the blending amount of hydrotreated crude gasoline in a timely manner, thereby achieving dynamic control of the blending ratio, stabilizing the temperature drop of the reforming reactor within a specific range, thus ensuring the stability of the octane number of the reformed gasoline product, providing a solid guarantee for the efficient and stable operation of the unit and the improvement of product quality.

[0018] 2. The system provided by this utility model for controlling the proportion of crude gasoline blended and hydrogenated in a reforming unit includes an atmospheric naphtha control pipeline comprising a flow controller, a flow transmitter, and a pneumatic regulating valve. The flow controller receives information from a level controller, the flow transmitter monitors the feed flow rate in the atmospheric naphtha control pipeline and feeds back the monitored flow information to the flow controller. The flow controller controls the feed flow rate through the pneumatic regulating valve based on the received information, resulting in timely and highly accurate adjustments.

[0019] 3. The system provided by this utility model for controlling the proportion of hydrotreated crude gasoline in a reforming unit includes a hydrotreated crude gasoline control pipeline comprising a flow controller II, a flow transmitter II, and a pneumatic regulating valve II. The level controller II sends level-related information to the flow controller II. The flow transmitter II monitors the feed flow rate in the hydrotreated crude gasoline control pipeline and feeds back the monitored flow information to the flow controller II. The flow controller II controls the feed flow rate through the pneumatic regulating valve II based on the received information, resulting in timely adjustments and high accuracy. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram illustrating the principle of this utility model.

[0022] Explanation of reference numerals in the attached diagrams: 1. Pneumatic regulating valve II; 2. Valve V; 3. Valve VI; 4. Sub-line valve IV; 5. Drain valve IV; 6. Flow transmitter II; 7. Valve VII; 8. Valve VIII; 9. Sub-line valve III; 10. Drain valve III; 11. Remote pressure transmitter; 12. Pipeline static mixer; 13. Valve X; 14. Valve XI; 15. Valve XII; 16. Drain valve V; 17. Valve IX; 18. Raw material buffer tank; 19. Liquid level. Controller 1; 20. Level Controller 2; 21. Flow Controller 1; 22. Flow Transmitter 1; 23. Pneumatic Control Valve 1; 24. Valve 1; 25. Valve 2; 26. Valve 3; 27. Valve 4; 28. Sub-line Valve 1; 29. ​​Sub-line Valve 2; 30. Flow Controller 2; 31. Level Controller 3; 32. Level Control Loop Selector; 33. Drain Valve 1; 34. Drain Valve 2; 35. Remote Flow Transmitter. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. Unless otherwise specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0024] Example 1:

[0025] like Figure 1 As shown, a system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit includes an atmospheric naphtha control line, a hydrotreated crude gasoline control line, a feedstock buffer tank 18, a gasoline mixing unit, a level controller 19, and a level controller 20. The level monitoring terminal of the feedstock buffer tank 18 is electrically connected to the signal receiving terminals of the level controller 19 and the level controller 20, respectively. The execution terminal of the level controller 19 is electrically connected to the atmospheric naphtha control line, and the execution terminal of the level controller 20 is electrically connected to the hydrotreated crude gasoline control line. The outlets of both the atmospheric naphtha control line and the hydrotreated crude gasoline control line are connected to the inlet of the gasoline mixing unit, and the outlet of the gasoline mixing unit is connected to the inlet of the feedstock buffer tank 18.

[0026] Specifically, atmospheric naphtha is supplied to the gasoline mixing unit via an atmospheric naphtha control pipeline, and hydrotreated crude gasoline is supplied to the gasoline mixing unit via a hydrotreated crude gasoline control pipeline. After being mixed in the gasoline mixing unit, the atmospheric naphtha and hydrotreated crude gasoline are transported to the feedstock buffer tank 18. Level controller 19 and level controller 20 select and control the atmospheric naphtha control pipeline and / or the hydrotreated crude gasoline control pipeline according to the liquid level in the feedstock buffer tank 18, thereby achieving precise, stable and effective control of the liquid level in the feedstock buffer tank 18. Based on the temperature drop data of the reforming reactor and the product analysis results, this utility model adjusts the blending amount of hydrotreated crude gasoline in a timely manner, thereby achieving dynamic control of the blending ratio, stabilizing the temperature drop of the reforming reactor within a specific range, thus ensuring the stability of the octane number of the reformed gasoline product, providing a solid guarantee for the efficient and stable operation of the unit and the improvement of product quality.

[0027] Preferably, the system further includes a level controller 31 and a level control loop selector 32. The level monitoring terminal of the raw material buffer tank 18 is electrically connected to the level controller 31 and the level control loop selector 32 in sequence, and then electrically connected to the signal receiving terminal of the level controller 19 and the signal receiving terminal of the level controller 20, respectively.

[0028] Specifically, when level controller 19 is selected to control the level of feedstock buffer tank 18, the atmospheric naphtha control pipeline is used to control the level of feedstock buffer tank 18; when level controller 20 is selected to control the level of feedstock buffer tank 18, the hydrotreated crude gasoline control pipeline is used to control the level of feedstock buffer tank 18.

[0029] Example 2:

[0030] Based on Example 1, the atmospheric pressure naphtha control pipeline includes a flow controller 21, a flow transmitter 22, and a pneumatic regulating valve 23. The flow transmitter 22 and the pneumatic regulating valve 23 are connected in series. The level controller 19 is electrically connected to the flow transmitter 22 through the flow controller 21. The actuator of the flow controller 21 is connected to the actuator of the pneumatic regulating valve 23.

[0031] Specifically, the flow controller 21 receives the liquid level information sent by the liquid level controller 19, and the flow transmitter 22 monitors the feed flow in the atmospheric pressure naphtha control pipeline and feeds back the monitored flow information to the flow controller 21. The flow controller 21 adjusts the pneumatic regulating valve 23 according to the received information (sent by the liquid level controller 19 and the flow transmitter 22). The pneumatic regulating valve 23 precisely controls the feed flow, and the adjustment is timely and highly accurate.

[0032] Preferably, the atmospheric pressure naphtha control pipeline further includes valve 24 and valve 25, and flow transmitter 22, valve 24, pneumatic regulating valve 23 and valve 25 are connected in series.

[0033] Specifically, valves 24 and 25 provide double isolation for pneumatic regulating valve 23, avoiding safety risks caused by misoperation.

[0034] Preferably, the atmospheric pressure naphtha control pipeline further includes valve 26 and valve 27, with valve 26, flow transmitter 22, valve 27 and valve 24 connected in series.

[0035] Specifically, valves 26 and 27 provide dual isolation for flow transmitter 22, avoiding safety risks caused by misoperation.

[0036] Preferably, the atmospheric pressure naphtha control pipeline further includes a secondary line valve 28, a third valve 26, a flow transmitter 22, and a fourth valve 27 connected in parallel to the secondary line valve 28.

[0037] Specifically, valves 26 and 27 are closed, and bypass valve 28 is opened, allowing fluid to flow through the bypass where flow transmitter 22 is located, thus enabling maintenance of flow transmitter 22.

[0038] Preferably, the atmospheric pressure naphtha control pipeline further includes a secondary line valve 29, and valve 24, pneumatic regulating valve 23, and valve 25 are connected in parallel to the secondary line valve 29.

[0039] Specifically, valve 24 and valve 25 are closed, and bypass valve 29 is opened. Fluid flows through the bypass where bypass valve 29 is located, thus enabling maintenance of pneumatic regulating valve 23.

[0040] Preferably, the atmospheric pressure naphtha control pipeline further includes a drain valve 33, which is connected to the pipeline between valve 24 and pneumatic regulating valve 23.

[0041] Specifically, the drain valve 33 facilitates the discharge of residual fluid in the pipeline where the pneumatic regulating valve 23 is located, or for cleaning.

[0042] Preferably, the atmospheric pressure naphtha control pipeline further includes a second drain valve 34, which is connected to the pipeline between the first flow transmitter 22 and the fourth valve 27.

[0043] Specifically, the drain valve 234 facilitates the discharge of residual fluid in the pipeline where the flow transmitter 22 is located or for cleaning.

[0044] Example 3:

[0045] Based on Example 2, the hydrogenated crude gasoline control pipeline includes a flow controller 2 30, a flow transmitter 2 6, and a pneumatic regulating valve 2 1. The flow transmitter 2 6 and the pneumatic regulating valve 2 1 are connected in series. The level controller 2 20 is electrically connected to the flow transmitter 2 6 through the flow controller 2 30. The actuator of the flow controller 2 30 is connected to the actuator of the pneumatic regulating valve 2 1.

[0046] Specifically, level controller 20 sends level-related information to flow controller 30, flow transmitter 6 monitors the feed flow in the hydrogenated crude gasoline control pipeline and feeds back the monitored flow information to flow controller 30. Flow controller 30 controls the feed flow through pneumatic regulating valve 1 based on the received information, with timely and high accuracy.

[0047] Preferably, the hydrogenated crude gasoline control pipeline further includes valve 2 and valve 3, and flow transmitter 6, valve 2, pneumatic regulating valve 1 and valve 3 are connected in series.

[0048] Specifically, valves 5 (2) and 6 (3) provide double isolation for pneumatic regulating valve 2 (1), avoiding safety risks caused by misoperation.

[0049] Preferably, the hydrogenated crude gasoline control pipeline further includes valve 7 and valve 8, with valve 7, flow transmitter 2 6, valve 8 8 and valve 5 2 connected in series.

[0050] Specifically, valves 7 and 8 provide dual isolation for flow transmitter 6, avoiding safety risks caused by misoperation.

[0051] Preferably, the hydrogenated crude gasoline control pipeline further includes a secondary line valve 3 9, a valve 7, a flow transmitter 2 6, and a valve 8 connected in parallel to the secondary line valve 3 9.

[0052] Specifically, valves 7 and 8 are closed, and the bypass valve 3 is opened. The fluid flows through the bypass where the bypass valve 3 is located, thus enabling the maintenance of the flow transmitter 6.

[0053] Preferably, the hydrogenated crude gasoline control line further includes a secondary line valve 4, a valve 5, a pneumatic regulating valve 2, and a valve 6 connected in parallel to the secondary line valve 4.

[0054] Specifically, valves 5 (2) and 6 (3) are closed, and the bypass valve 4 (4) is opened. The fluid flows through the bypass where the bypass valve 4 (4) is located, thus achieving the maintenance of the pneumatic regulating valve 2 (1).

[0055] Preferably, the hydrotreated crude gasoline control pipeline further includes a drain valve 310, which is connected to the pipeline between the flow transmitter 26 and the valve 8.

[0056] Specifically, the drain valve 310 facilitates the discharge of residual fluid in the pipeline where the flow transmitter 26 is located, or for cleaning.

[0057] Preferably, the hydrotreated crude gasoline control line further includes a drain valve 4 5, and the drain valve 4 5 is connected to the pipeline between valve 5 2 and pneumatic regulating valve 2 1.

[0058] Specifically, the drain valve 45 facilitates the discharge of residual fluid in the pipeline where the pneumatic regulating valve 21 is located, or for cleaning.

[0059] Preferably, a valve 9 17 is provided between the atmospheric naphtha control pipeline and the hydrotreated crude gasoline control pipeline. One end of the valve 9 17 is connected to the inlet merge line of the valve 7 and the auxiliary line valve 3 9, and the other end of the valve 9 17 is connected to the inlet merge line of the valve 3 26 and the auxiliary line valve 1 28.

[0060] Specifically, by opening valve 917, the normal pressure naphtha control pipeline and the hydrogenated crude gasoline control pipeline can be connected as needed. The structure is simple and the operation is convenient.

[0061] Example 4:

[0062] Based on Example 3, the gasoline mixing unit includes a pipeline static mixer 12, and the outlet of valve 25, the outlet of secondary valve 29, the outlet of valve 6 3 and the outlet of secondary valve 4 are connected to the inlet of the pipeline static mixer 12 after being merged by pipelines.

[0063] Specifically, the pipeline static mixer 12 has good mixing effect, low energy consumption, and simple structure.

[0064] Preferably, the gasoline mixing unit further includes valve 10 13 and valve 11 14, with valve 10 13, pipeline static mixer 12 and valve 11 14 connected in series.

[0065] Specifically, valves 10 and 11 provide double isolation for the static mixer 12 in the pipeline, avoiding safety risks caused by misoperation.

[0066] Preferably, the gasoline mixing unit further includes a secondary line valve 15, a valve 10 13, a pipeline static mixer 12, and a valve 11 14 connected in parallel to the secondary line valve 15.

[0067] Specifically, valves 10 and 11 are closed, and the bypass valve 5 is opened. The fluid flows through the bypass where the bypass valve 5 is located, thus maintaining the static mixer 12 in the pipeline.

[0068] Preferably, the gasoline mixing unit further includes a drain valve 16, which is connected to the pipeline between the pipeline static mixer 12 and valve 13.

[0069] Specifically, the drain valve 16 facilitates the discharge of residual fluid in the pipeline where the static mixer 12 is located or for cleaning.

[0070] Preferably, a remote pressure transmitter 11 is installed on the outlet merging pipeline of the atmospheric naphtha control pipeline and the hydrotreated crude gasoline control pipeline.

[0071] Specifically, the remote pressure transmitter 11 facilitates monitoring of the pressure inside the outlet merging pipeline of the atmospheric naphtha control pipeline and the hydrogenated crude gasoline control pipeline, ensuring system safety.

[0072] Preferably, a remote flow transmitter 35 is installed on the pipeline between the outlet of the gasoline mixing unit and the raw material buffer tank 18.

[0073] Specifically, the remote flow transmitter 35 facilitates monitoring of the flow rate in the outlet pipeline of the gasoline mixing unit, ensuring system safety.

[0074] The working principle of this utility model is as follows:

[0075] Atmospheric naphtha is supplied to the gasoline mixing unit via an atmospheric naphtha control pipeline, and hydrotreated crude gasoline is supplied to the gasoline mixing unit via a hydrotreated crude gasoline control pipeline. The atmospheric naphtha and hydrotreated crude gasoline are mixed in a static mixer 12 within the gasoline mixing unit and then transported to a feedstock buffer tank 18. Level controller 19 and level controller 20 select and control the atmospheric naphtha control pipeline and / or the hydrotreated crude gasoline control pipeline based on the liquid level in the feedstock buffer tank 18, achieving precise, stable, and effective control of the liquid level within the feedstock buffer tank 18. Level controller 20 sends level-related information to flow controller 30. Flow transmitter 26 monitors the feed flow rate in the hydrogenated crude gasoline control line and feeds back the monitored flow information to flow controller 20. Flow controller 20 automatically controls the feed flow rate in the atmospheric naphtha control line based on the received information through pneumatic regulating valve 21. Liquid level controller 20 sends liquid level-related information to flow controller 20. Flow transmitter 26 monitors the feed flow rate in the hydrogenated crude gasoline control line and feeds back the monitored flow information to flow controller 20. Flow controller 20 automatically controls the feed flow rate based on the received information through pneumatic regulating valve 21. The adjustment is timely and highly accurate.

[0076] This invention effectively controls fluctuations in feedstock ratios, significantly reducing the likelihood of unstable operating conditions such as rapid temperature changes and abnormal pressure fluctuations in the reforming reaction. It completely eliminates the risk of unit shutdown due to insufficient atmospheric naphtha supply, minimizing the frequency of shutdowns and maintenance, laying a solid foundation for continuous production, and greatly improving production efficiency and equipment utilization. Furthermore, it precisely controls the proportion of hydrogenated crude gasoline blended in the reforming unit, significantly enhancing the unit's operational stability, stabilizing the reaction and extending catalyst life, ensuring stable product quality output, effectively reducing production and blending costs, improving enterprise efficiency and competitiveness, and contributing to sustainable high-quality development.

[0077] In terms of precise control of the blending ratio, the extensive manual blending method based on experience is abandoned. Instead, the system of this invention for controlling the blending ratio of hydrogenated crude gasoline in the reforming unit is adopted. Based on the temperature drop of the reforming reactor and the product test results, the blending ratio is precisely adjusted to avoid quality fluctuations and ensure the output of high-quality products.

[0078] In terms of improving the stability of unit operation, the blending ratio is adjusted in a timely manner based on relevant data to maintain reaction stability, reduce unstable operating conditions caused by fluctuations in raw material ratio, effectively eliminate the risk of unit shutdown due to insufficient atmospheric naphtha supply, reduce the number of shutdowns for maintenance, ensure continuous production, and improve production and equipment utilization efficiency.

[0079] Regarding product quality optimization, given that the blending ratio affects key quality indicators of reformed gasoline, this invention focuses on target parameters and ensures quality compliance through precise control. In the blending of finished gasoline, the high octane number of reformed gasoline is utilized to reduce blending costs and increase enterprise profits.

[0080] In terms of reducing production costs, stable operation reduces additional costs, smooth reaction extends catalyst life, and continuous exploration of efficient blending strategies reduces costs from multiple dimensions, improves corporate efficiency and competitiveness, and contributes to sustainable development.

[0081] In the description of this utility model, it should be understood that if any term indicates an orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting this utility model.

[0082] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit, characterized in that: The system includes an atmospheric naphtha control line, a hydrotreated crude gasoline control line, a feedstock buffer tank (18), a gasoline mixing unit, a level controller one (19), and a level controller two (20). The level monitoring end of the feedstock buffer tank (18) is electrically connected to the signal receiving end of the level controller one (19) and the signal receiving end of the level controller two (20), respectively. The execution end of the level controller one (19) is electrically connected to the atmospheric naphtha control line, and the execution end of the level controller two (20) is electrically connected to the hydrotreated crude gasoline control line. The outlet of the atmospheric naphtha control line and the outlet of the hydrotreated crude gasoline control line are both connected to the inlet of the gasoline mixing unit. The outlet of the gasoline mixing unit is connected to the inlet of the feedstock buffer tank (18).

2. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 1, characterized in that: The atmospheric pressure naphtha control pipeline includes a flow controller (21), a flow transmitter (22), and a pneumatic regulating valve (23). The flow transmitter (22) and the pneumatic regulating valve (23) are connected in series. The level controller (19) is electrically connected to the flow transmitter (22) through the flow controller (21). The actuator of the flow controller (21) is connected to the actuator of the pneumatic regulating valve (23).

3. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 2, characterized in that: The atmospheric pressure naphtha control pipeline also includes valve one (24) and valve two (25), and flow transmitter one (22), valve one (24), pneumatic regulating valve one (23) and valve two (25) are connected in series.

4. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 3, characterized in that: The atmospheric pressure naphtha control pipeline also includes valve three (26) and valve four (27), and valve three (26), flow transmitter one (22), valve four (27) and valve one (24) are connected in series.

5. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 4, characterized in that: The atmospheric pressure naphtha control pipeline also includes a secondary line valve one (28), a valve three (26), a flow transmitter one (22), and a valve four (27) connected in parallel to the secondary line valve one (28).

6. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 5, characterized in that: The atmospheric pressure naphtha control pipeline also includes a secondary line valve 2 (29), and valve 1 (24), pneumatic regulating valve 1 (23) and valve 2 (25) are connected in parallel to the secondary line valve 2 (29).

7. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 1, characterized in that: The hydrogenated crude gasoline control pipeline includes a flow controller two (30), a flow transmitter two (6), and a pneumatic regulating valve two (1). The flow transmitter two (6) and the pneumatic regulating valve two (1) are connected in series. The level controller two (20) is electrically connected to the flow transmitter two (6) through the flow controller two (30). The actuator of the flow controller two (30) is connected to the actuator of the pneumatic regulating valve two (1).

8. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 7, characterized in that: The hydrogenated crude gasoline control pipeline also includes valve five (2) and valve six (3), and flow transmitter two (6), valve five (2), pneumatic regulating valve two (1) and valve six (3) are connected in series.

9. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 8, characterized in that: The hydrogenated crude gasoline control pipeline also includes valve seven (7) and valve eight (8), and valve seven (7), flow transmitter two (6), valve eight (8) and valve five (2) are connected in series.

10. The system for controlling the proportion of hydrotreated crude gasoline blended in a reforming unit as described in claim 9, characterized in that: The hydrogenated crude gasoline control pipeline also includes a secondary line valve three (9), a valve seven (7), a flow transmitter two (6), and a valve eight (8) connected in parallel to the secondary line valve three (9).

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