A delivery control system and control method for a heavy oil fuel

Abstract

The present application provides a kind of heavy oil fuel conveying control system, comprising: two original production line corresponding heavy oil fuel conveying pipeline, still including the intercommunication of two pipelines and the heavy oil fuel conveying pipeline corresponding to new production line.The conveying control method of the system is: according to the liquid level data of intermediate tank, judge whether to supply oil;During the process of supplying oil, according to the liquid level data and the pressure data of the front end of conveying pump, judge whether there is abnormality in supplying oil;When there is abnormality, determine the cause of abnormality, feedback, switch to adjacent heavy oil conveying pipeline to supply oil.The present application intercommunicates the oil supply pipeline of different production lines, and is uniformly scheduled and managed by control system, when the heavy oil conveying of single production line has a problem, the value of pressure monitor is judged by using control system, rapid analysis and judgment of fault are realized, maintenance feedback is given, oil supply pipeline is immediately switched, and production is ensured.

Description

Technical Field

[0001] This invention relates to the field of fuel transportation control technology, and in particular to a heavy oil fuel transportation control system and control method. Background Technology

[0002] Heavy oil is an important fuel for melting raw materials in glass production, and its storage and distribution are crucial. Sufficient and stable heavy oil storage is an important guarantee for glass production and glass quality.

[0003] The traditional design for heavy oil storage and transportation involves a single production line with a single heavy oil storage terminal. Sufficient heavy oil storage is allocated based on the maximum fuel requirement of the production line within a certain cycle. This storage is controlled by corresponding pipelines, pumps, and valves, transporting the heavy oil to an intermediate tank at the production line end. The production line then obtains its daily fuel from the intermediate tank. Multiple production lines operate independently without interference or assistance. However, under this system, if the heavy oil transportation equipment on a particular production line malfunctions or if the heavy oil storage is disrupted due to factors such as crude oil supply or oil quality issues, the production operations of that production line and glass manufacturing will be significantly affected. Furthermore, in actual production layouts, the heavy oil reserve at a single storage terminal is very high, reaching up to 9000 tons, which puts significant pressure on the storage capacity when used solely for a single production line.

[0004] Existing technology interconnects adjacent heavy oil pipelines and controls them through an intelligent controller. When a heavy oil pipeline is restricted, oil can be diverted from adjacent pipelines, ensuring the supply to the corresponding production line and buying time for equipment maintenance or fuel replenishment in the restricted pipeline.

[0005] Its drawback is that the control is singular. When the heavy oil delivery pipeline is restricted, the oil supply is immediately switched to the adjacent heavy oil delivery pipeline. It requires manual judgment of the reason for the restriction of the heavy oil delivery pipeline. After the reason for the restriction is eliminated, the oil supply is switched back to the original heavy oil delivery pipeline from the control end.

[0006] In addition, when a new production line is added in the area, a new heavy oil storage terminal needs to be built for it, and the heavy oil transmission pipeline corresponding to the heavy oil storage terminal needs to be interconnected with the adjacent transmission pipeline, which will create a huge storage pressure.

[0007] Therefore, improvements to existing technologies are necessary. Summary of the Invention

[0008] This invention provides a heavy oil fuel transportation control system and control method to solve the above-mentioned problems.

[0009] One technical solution adopted by this invention is: providing a heavy oil fuel conveying control system, comprising:

[0010] The first heavy oil storage tank group, the first heavy oil delivery pipeline and the first intermediate tank are connected in sequence. The first heavy oil delivery pipeline is equipped with a first control valve, a first filter, a first pressure detector, a first delivery pump and a first tank front valve. When the first intermediate tank has a low liquid level, the first tank front valve opens and the first delivery pump pumps oil until the first intermediate tank has a high liquid level.

[0011] The second heavy oil storage tank group, the second heavy oil delivery pipeline, and the second intermediate tank are connected in sequence. The second heavy oil delivery pipeline is equipped with a second control valve, a second filter, a second pressure detector, a second delivery pump, and a second tank front valve. When the second intermediate tank has a low liquid level, the second tank front valve opens and the second delivery pump pumps oil until the second intermediate tank has a high liquid level.

[0012] The first heavy oil conveying pipeline and the second heavy oil conveying pipeline are interconnected by a switchable pipeline. The switchable pipeline is equipped with a first switching valve. By opening the first switching valve, the two production lines can share the heavy oil storage tank group to deal with the situation where one group of heavy oil cannot be supplied normally, thus buying time for the maintenance of the conveying equipment or the replenishment of fuel and ensuring production.

[0013] The control system is connected to a PLC control cabinet, which in turn connects to all filters, pressure detectors, delivery pumps, valves, and intermediate tank level gauges within the system. The control system controls the opening and closing of valves and the start and stop of delivery pumps.

[0014] Furthermore, backup pipelines are provided between the first heavy oil storage tank group and the first transfer pump, and between the second heavy oil storage tank group and the second transfer pump. Backup control valves are provided on the backup pipelines. When the first filter and the second filter are under maintenance, the backup control valves are opened to transfer heavy oil.

[0015] Furthermore, both the first and second delivery pumps are provided in pairs, connected in parallel, with one as a backup. When the main delivery pump is under maintenance, the heavy oil is delivered through the backup delivery pump.

[0016] Furthermore, a first pump-after valve is also provided at the rear end of the first delivery pump. When the first pump-after valve is closed and the first switching valve is open, the intermediate tanks in the system share the second heavy oil storage tank group, and the rear end of the second delivery pump is set in the same way as the first delivery pump.

[0017] Furthermore, the switchable pipeline is also connected to a third heavy oil delivery pipeline, which connects to a third intermediate tank, and uses the existing heavy oil storage tank group to supply oil to the new production line. A second switching valve is added to the switchable pipeline, which works in conjunction with the first switching valve to control the on / off of the two heavy oil delivery lines respectively. A third tank front valve is installed on the third heavy oil delivery pipeline.

[0018] Furthermore, all valves used in the system are pneumatic isolation valves.

[0019] Another technical solution adopted by this invention is: providing a method for controlling the delivery of heavy oil fuel, the specific steps of which are as follows:

[0020] S1. Collect the liquid level data of the intermediate tank through the intermediate tank level gauge;

[0021] S2. Determine if the intermediate tank is at a low liquid level;

[0022] S3. When the intermediate tank is at a low liquid level, the control system opens the preset heavy oil delivery pipeline or the corresponding tank front valve to supply oil to the intermediate tank.

[0023] S4. During the oil supply process, pressure data at the front end of the delivery pump is collected through a pressure detector;

[0024] S5. Determine if the heavy oil delivery pipeline is supplying oil normally;

[0025] S6. When the liquid level in the intermediate tank does not change, the oil supply in the heavy oil delivery pipeline is abnormal. Determine whether the pressure value of the pressure detector is negative.

[0026] S7. When the pressure value of the pressure detector at the front end of the transfer pump is negative, prompt the filter to be repaired and switch to the adjacent heavy oil transfer pipeline for oil supply, and return to step S4. When the pressure value of the pressure detector at the front end of the transfer pump is not negative, prompt the current transfer pump to be repaired and switch to the adjacent heavy oil transfer pipeline for oil supply, and return to step S4.

[0027] S8. Determine if the intermediate tank is at a high liquid level;

[0028] S9. When the intermediate tank reaches a high liquid level, the control system closes the current heavy oil delivery pipeline or the corresponding tank front valve to end the oil supply.

[0029] Furthermore, a backup pipeline is provided between the heavy oil storage tank group and the transfer pump. Multiple transfer pumps are connected in parallel. In step S7, when the pressure value of the pressure detector at the front end of the transfer pump is negative, it prompts to repair the filter and switch to the backup pipeline, returning to step S5. When the pressure value of the pressure detector at the front end of the transfer pump is not negative, it is determined whether there is a usable backup transfer pump. When there is a usable backup transfer pump, it prompts to repair the current transfer pump and switch to the backup transfer pump, returning to step S5. When all transfer pumps are abnormal, it prompts to repair the current transfer pump and switch to the adjacent heavy oil transfer pipeline for oil supply, returning to step S4.

[0030] Furthermore, in step S6, it is also necessary to determine whether the heavy oil storage tank group is abnormal. When the heavy oil storage tank group cannot supply oil due to fuel quality or insufficient inventory, the current heavy oil delivery pipeline or the corresponding tank front valve is directly closed, and the oil supply is switched to the adjacent heavy oil delivery pipeline, returning to step S4.

[0031] Furthermore, when an intermediate tank of a new production line is connected to the system, a heavy oil delivery pipeline is pre-installed for it.

[0032] The beneficial effects of the heavy oil fuel transportation control system and control method of the present invention are:

[0033] 1. Connect the oil supply pipelines of different production lines and manage them uniformly through the control system. When a problem occurs in the heavy oil delivery of a single production line, the control system uses the values ​​of the pressure monitor to quickly analyze and judge the fault, provide maintenance feedback, and immediately switch the oil supply pipeline to ensure production. Attached Figure Description

[0034] Figure 1 This is a heavy oil fuel delivery and control system according to the first embodiment of the present invention;

[0035] Figure 2 This is a flowchart of a heavy oil fuel transportation control method according to the first embodiment of the present invention;

[0036] The components in the attached diagram are labeled as follows: 1. First heavy oil storage tank group; 2. First heavy oil delivery pipeline; 3. Backup pipeline; 4. First intermediate tank; 5. Second heavy oil storage tank group; 6. Second heavy oil delivery pipeline; 7. Second intermediate tank; 8. Switchable pipeline; 9. Third heavy oil delivery pipeline; 10. Third intermediate tank; 21. First control valve; 22. First filter; 23. First pressure detector; 24. First delivery pump; 25. First post-pump valve; 26. First tank front valve; 31. Backup control valve; 61. Second control valve; 62. Second filter; 63. Second pressure detector; 64. Second delivery pump; 65. Second tank front valve; 81. First switching valve; 82. Second switching valve; 91. Third tank front valve. Detailed Implementation

[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "horizontal", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0039] Please see Figure 1The first embodiment of the present invention provides a heavy oil fuel conveying control system, including heavy oil fuel conveying pipelines corresponding to two existing production lines:

[0040] The first heavy oil storage tank group 1, the first heavy oil delivery pipeline 2, and the first intermediate tank 4 are connected in sequence. The first heavy oil delivery pipeline 2 is equipped with a first control valve 21, a first filter 22, a first pressure detector 23, a first delivery pump 24, and a first tank front valve 26. When the first intermediate tank 4 has a low liquid level, the first tank front valve 26 opens and the first delivery pump 24 pumps oil until the first intermediate tank 4 has a high liquid level. Then, the first tank front valve 26 closes and the first delivery pump 24 stops.

[0041] The second heavy oil storage tank group 5, the second heavy oil delivery pipeline 6, and the second intermediate tank 7 are connected in sequence. The second heavy oil delivery pipeline 6 is equipped with a second control valve 61, a second filter 62, a second pressure detector 63, a second delivery pump 64, and a second tank front valve 65. When the liquid level in the second intermediate tank 7 is low, the second tank front valve 65 opens and the second delivery pump 64 pumps oil until the liquid level in the second intermediate tank 7 is high. Then, the second tank front valve 65 closes and the second delivery pump 64 stops.

[0042] This also includes the interconnection of the two pipelines and the heavy oil fuel delivery pipeline corresponding to the new production line:

[0043] The first heavy oil conveying pipeline 2 and the second heavy oil conveying pipeline 6 are interconnected by a switchable pipeline 8, allowing the two production lines to share the heavy oil storage tank group. The switchable pipeline 8 is equipped with a first switching valve 81. By opening the first switching valve, the situation where one of the heavy oil groups cannot be supplied normally can be dealt with, which buys time for the maintenance of the conveying equipment or the replenishment of fuel and ensures production.

[0044] The switchable pipeline 8 is also connected to a third heavy oil delivery pipeline 9, which connects to the third intermediate tank 10. The existing heavy oil storage tank group is used to supply oil to the new production line. A second switching valve 82 is added to the switchable pipeline 8, which works in conjunction with the first switching valve 81 to control the on / off of the two heavy oil delivery lines respectively. A third tank front valve 91 is set on the third heavy oil delivery pipeline 9. When the liquid level of the third intermediate tank 10 is low, the third tank front valve 91 is opened, and the first delivery pump 24 or the second delivery pump 64 pumps oil until the liquid level of the third intermediate tank 10 is high. At this time, the corresponding tank front valve is closed and the delivery pump stops.

[0045] The control system is connected to the PLC control cabinet, which in turn connects to all filters, pressure detectors, transfer pumps, valves, and intermediate tank level gauges within the system. The control system controls the opening and closing of valves and the start and stop of transfer pumps.

[0046] To ensure the smooth operation of the conveying system, reduce oil supply problems caused by equipment maintenance, and control the frequency of oil supply switching, the following backup settings were implemented:

[0047] A backup pipeline 3 is provided between the first heavy oil storage tank group 1 and the first transfer pump 24. A backup control valve 31 is provided on the backup pipeline 3. When the first filter 22 is blocked, the first control valve 21 is closed and the backup control valve 31 is opened to transfer heavy oil, so as to avoid the entire line from shutting down to repair the filter.

[0048] There are two first transfer pumps 24, connected in parallel, one as a backup and the other as a standby. When the main transfer pump fails, the system automatically switches to the standby pump to transfer heavy oil so that the main transfer pump can be repaired.

[0049] The first pump 24 is also equipped with a first pump post valve 25. When the first heavy oil storage tank group 1 cannot supply heavy oil normally due to factors such as fuel quality or inventory, the first pump post valve 25 is closed and the first switching valve 81 is opened. The intermediate tanks in the system share the second heavy oil storage tank group. Similarly, the second pump post valve is also equipped with a second pump post valve at the rear end of the second pump.

[0050] Please see Figure 2 The first embodiment of the present invention provides a method for controlling the delivery of heavy oil fuel, the specific steps of which are as follows:

[0051] S1. Collect the liquid level data of the intermediate tank through the intermediate tank level gauge;

[0052] S2. Determine if the intermediate tank is at a low liquid level;

[0053] S3. When the intermediate tank is at a low liquid level, the control system opens the preset heavy oil delivery pipeline or the corresponding tank front valve to supply oil to the intermediate tank.

[0054] S4. During the oil supply process, pressure data at the front end of the delivery pump is collected through a pressure detector;

[0055] S5. Determine if the heavy oil delivery pipeline is supplying oil normally;

[0056] S6. When the liquid level in the intermediate tank does not change, the oil supply in the heavy oil delivery pipeline is abnormal. Determine whether the pressure value of the pressure detector is negative.

[0057] S7. When the pressure value of the pressure detector at the front end of the delivery pump is negative, prompt the filter to be repaired and switch to the standby pipeline. Return to step S5. When the pressure value of the pressure detector at the front end of the delivery pump is not negative, determine whether there is a standby delivery pump available.

[0058] S8. When there is a standby delivery pump available, prompt the user to inspect the current delivery pump and switch to the standby delivery pump, and return to step S5. When all delivery pumps are abnormal, prompt the user to inspect the current delivery pump and switch to the adjacent heavy oil delivery pipeline for oil supply, and return to step S4.

[0059] S9. Determine if the intermediate tank is at a high liquid level;

[0060] S8. When the intermediate tank reaches a high liquid level, the control system closes the current heavy oil delivery pipeline or the corresponding tank front valve to end the oil supply.

[0061] Specifically, in step S6, it is also necessary to determine whether the heavy oil storage tank group is abnormal. When the heavy oil storage tank group cannot supply oil due to fuel quality or insufficient inventory, the current heavy oil delivery pipeline or the corresponding tank front valve is directly closed, and the oil supply is switched to the adjacent heavy oil delivery pipeline, returning to step S4.

[0062] Specifically, after the control system detects an equipment malfunction, it will not only prompt for maintenance but also mark the abnormal equipment. Once the maintenance is completed, the staff will reset the corresponding mark. Therefore, in step S7, the control system determines whether there are any available backup delivery pumps based on the equipment marking status.

[0063] Specifically, when an intermediate tank of a new production line is connected to the system, a heavy oil delivery pipeline is pre-installed for it.

[0064] In this embodiment, the heavy oil control of the three production lines is integrated into a single control system, with PLC logic control replacing the original circuit control. Since the intermediate tanks of the three production lines are supplied by two heavy oil storage tank groups, the system will have four operating modes:

[0065] In Mode 1, the first, second, and third intermediate tanks share the first heavy oil storage tank group: the post-pump valve of the second transfer pump is normally closed, while the post-pump valve, first switching valve, and second switching valve of the first transfer pump are normally open. When the liquid level in each of the three intermediate tanks is low, their respective inlet valves open, and the active pump selected for the first heavy oil storage tank group begins pumping oil until the liquid level in the intermediate tank is high, at which point the corresponding inlet valve closes. The transfer pump starts when the liquid level in the intermediate tank is low or receives a signal, and stops when the liquid level in the intermediate tank is high and receives a signal.

[0066] In Mode 2, the first, second, and third intermediate tanks share the second heavy oil storage tank group: the post-pump valve of the first transfer pump is normally closed, and the post-pump valve, the first switching valve, and the second switching valve of the second transfer pump are normally open. The control logic of other parts is the same as that of Mode 1.

[0067] In Mode 3, the first and third intermediate tanks use the first heavy oil storage tank group, and the second intermediate tank uses the second heavy oil storage tank group: the second switching valve is closed, and the post-pump valve of the first transfer pump, the first switching valve, the pre-pump valve of the second tank, and the post-pump valve of the second transfer pump are normally open. When the liquid level in the first and third intermediate tanks is low, their respective pre-pump valves are opened, driving the selected oil pump of the heavy oil storage tank group to pump oil until the liquid level in the intermediate tank is high, at which point the corresponding pre-pump valve is closed. The second intermediate tank directly drives the selected oil pump of the second heavy oil storage tank group to pump oil based on its own liquid level. The pre-pump valve of the second tank and the post-pump valve of the second transfer pump are normally open, which reduces the number of operations and the number of failures.

[0068] Mode 4: The second and third intermediate tanks use the second heavy oil storage tank group, and the first intermediate tank uses the first heavy oil storage tank group. The first switching valve is closed, while the post-pump valve of the first transfer pump, the pre-pump valve of the first tank, the second switching valve, and the post-pump valve of the second transfer pump are normally open. When the liquid level in the second and third intermediate tanks is low, their respective pre-pump valves are opened, driving the selected oil pump of the second heavy oil storage tank group to pump oil until the intermediate tank reaches a high liquid level, at which point the corresponding pre-pump valve is closed. The first intermediate tank directly drives the selected oil pump of the first heavy oil storage tank group to pump oil based on its own liquid level. Similarly, the pre-pump valve of the first tank and the post-pump valve of the first transfer pump are normally open, reducing the number of operations and malfunctions.

[0069] Specifically, all valves used in the system are pneumatic isolation valves with an open failure mode and a manual mechanism. Each tank valve also has an open / closed position signal.

[0070] Specifically, in each mode, the control system still judges the oil supply status, prompts equipment maintenance, switches the required backup pipelines or backup delivery pumps, and switches the adjacent heavy oil delivery pipelines according to the control method.

[0071] The control system collects status data from each device and displays it on the screen in real time in a graphical manner. Production line workers can observe the system status through the screen, including the liquid level of each intermediate tank, the on / off status and abnormal status of each device on the heavy oil delivery pipeline, and the oil storage capacity of each heavy oil storage tank group. They can also manually add or remove intermediate tanks, preset heavy oil delivery pipelines for intermediate tanks, and change the oil supply route on the computer.

[0072] The control system can be configured to prioritize the oil supply for new production lines: by adding a judgment condition, when the oil storage capacity of the heavy oil storage tank group corresponding to the preset heavy oil delivery pipeline of the new production line is less than or equal to its required amount, a prompt will be made to shut down the front valve of the intermediate tank of another production line.

[0073] The beneficial effects of the heavy oil fuel delivery control system of the present invention are:

[0074] 1. The oil supply pipelines of different production lines are interconnected and uniformly scheduled and managed by the control system. When a problem occurs in the heavy oil delivery of a single production line, the cause of the fault can be quickly identified and reported, and the oil supply pipeline can be switched immediately to ensure production.

[0075] 2. By using the control system to judge the values ​​of the pressure monitor, fault analysis can be achieved and the system can switch to a suitable backup pipeline or backup delivery pump, thereby reducing the frequency of oil supply switching and improving maintenance and production efficiency.

[0076] 3. When a new production line is added in the region, the existing heavy oil storage can be used to supply oil, making more effective use of local heavy oil storage and reducing storage pressure;

[0077] 4. In actual production, the system status can be observed in real time through the screen, and remote control can be performed through the control system. The oil supply pipeline can be preset and manually switched, and priority can be set to ensure the oil supply of the new production line. The operation is convenient.

[0078] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for controlling the transport of heavy oil fuel, applied to a heavy oil fuel transport control system, characterized in that, The system includes: The first heavy oil storage tank group, the first heavy oil delivery pipeline and the first intermediate tank are connected in sequence. The first heavy oil delivery pipeline is equipped with a first control valve, a first filter, a first pressure detector, a first delivery pump and a first tank front valve. The second heavy oil storage tank group, the second heavy oil delivery pipeline, and the second intermediate tank are connected in sequence. The second heavy oil delivery pipeline is equipped with a second control valve, a second filter, a second pressure detector, a second delivery pump, and a second tank front valve. The first heavy oil delivery pipeline and the second heavy oil delivery pipeline are interconnected by a switchable pipeline, and a first switching valve is provided on the switchable pipeline. The control system is connected to the PLC control cabinet, which in turn connects to all filters, pressure detectors, delivery pumps, valves, and intermediate tank level gauges within the system. The control system controls the opening and closing of valves and the start and stop of delivery pumps. The specific steps of the method are as follows: S1. Collect the liquid level data of the intermediate tank through the intermediate tank level gauge; S2. Determine if the intermediate tank is at a low liquid level; S3. When the intermediate tank is at a low liquid level, the control system opens the preset heavy oil delivery pipeline or the corresponding tank front valve to supply oil to the intermediate tank. S4. During the oil supply process, pressure data at the front end of the delivery pump is collected through a pressure detector; S5. Determine if the heavy oil delivery pipeline is supplying oil normally; S6. When the liquid level in the intermediate tank does not change, the oil supply in the heavy oil delivery pipeline is abnormal. Determine whether the pressure value of the pressure detector is negative. S7. When the pressure value of the pressure detector at the front end of the transfer pump is negative, prompt the filter to be repaired and switch to the adjacent heavy oil transfer pipeline for oil supply, and return to step S4. When the pressure value of the pressure detector at the front end of the transfer pump is not negative, prompt the current transfer pump to be repaired and switch to the adjacent heavy oil transfer pipeline for oil supply, and return to step S4. S8. Determine if the intermediate tank is at a high liquid level; S9. When the intermediate tank reaches a high liquid level, the control system closes the current heavy oil delivery pipeline or the corresponding tank front valve to end the oil supply.

2. The method for controlling the transport of heavy oil fuel according to claim 1, characterized in that, A backup pipeline is installed between the heavy oil storage tank group and the transfer pump. Multiple transfer pumps are connected in parallel. In step S7, when the pressure value of the pressure detector at the front end of the transfer pump is negative, the system prompts to inspect the filter and switch to the backup pipeline, returning to step S5. When the pressure value of the pressure detector at the front end of the transfer pump is not negative, the system determines whether there is a usable backup transfer pump. If there is a usable backup transfer pump, the system prompts to inspect the current transfer pump and switch to the backup transfer pump, returning to step S5. When all transfer pumps are abnormal, the system prompts to inspect the current transfer pump and switch to the adjacent heavy oil transfer pipeline for oil supply, returning to step S4.

3. A method for controlling the transport of heavy oil fuel according to claim 1 or 2, characterized in that, In step S6, it is also necessary to determine whether the heavy oil storage tank group is abnormal. When the heavy oil storage tank group cannot supply oil due to fuel quality or insufficient inventory, the current heavy oil delivery pipeline or the corresponding tank front valve is directly closed, and the oil supply is switched to the adjacent heavy oil delivery pipeline, returning to step S4.

4. The method for controlling the transport of heavy oil fuel according to claim 3, characterized in that, When a new production line's intermediate tank is connected to the system, a heavy oil delivery pipeline is pre-installed for it.

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