Automatic control system for oil residue gasifier load

Abstract

The application discloses an oil residue gasification furnace load automatic control system and relates to the technical field of gasification furnaces. The oil residue gasification furnace load automatic control system comprises a first control loop, a second control loop and a third control loop. The first control loop comprises a rate controller, an oil residue flow controller and a first flow meter. The second control loop comprises a first flow transmitter, a first flow controller and a first flow regulating valve. The third control loop comprises a second flow transmitter, a second flow controller and a second flow regulating valve. The oil residue gasification furnace load automatic control system can automatically complete the synchronous proportioning adjustment of various materials, and the pump rotating speed and the valve opening degree do not need to be manually adjusted one by one, so that the operation frequency and the operation difficulty are reduced.

Description

Technical Field

[0001] This application relates to the field of gasifier technology, and in particular to an automatic load control system for an oil residue gasifier. Background Technology

[0002] Oil residue gasification technology is a novel gasification technology that uses oil residue (feed oil), oxygen, and steam as raw materials. These materials undergo a high-temperature combustion reaction in the combustion chamber of a gasifier to produce syngas for use in downstream systems. The gasifier is designed with process burners and an oil residue (feed oil) feed pump. Oxygen and steam are connected to the gasifier burners via oil residue pipelines, oxygen pipelines, and steam pipelines, respectively. The oil residue (feed oil) feed pump outputs oil residue (feed oil) to the process burners. One steam pipeline goes to the process burners, and the other goes to the oxygen mixer, where it mixes with oxygen and is then split into two streams to the process burners.

[0003] In the existing technology, since there are many material pipelines to the process burner of a gasifier, the material of each pipeline needs to be matched in proportion. When the process load is adjusted, the speed of the oil residue (feed oil) feed pump needs to be changed continuously, and the oxygen flow rate, steam flow rate, steam flow rate to the oxygen mixer, and central oxygen and steam flow rate also need to be adjusted continuously. The operation is difficult, frequent and prone to errors. Summary of the Invention

[0004] The purpose of this application is to provide an automatic load control system for an oil residue gasification furnace to solve the problem of frequent operation in existing technologies.

[0005] To achieve the above objectives, this application provides an automatic load control system for an oil residue gasifier, comprising: a first control loop, a second control loop, and a third control loop;

[0006] The first control loop includes a rate controller, an oil residue flow controller, and a first flow meter. The rate controller is used to adjust the set value of the oil residue flow controller, the oil residue flow controller can control the feed pump to adjust the oil residue flow, and the first flow meter is used to detect the flow of the oil residue pipeline.

[0007] The second control loop includes a first flow transmitter, a first flow controller, and a first flow regulating valve. The first flow transmitter is used to detect the oxygen pipeline flow rate. The first flow meter can send the oil residue pipeline flow rate to the first flow controller. The first flow transmitter can send the oxygen pipeline flow rate to the first flow controller. The first flow controller is used to control the first flow regulating valve. The first flow regulating valve is used to control the oxygen pipeline flow rate.

[0008] The third control loop includes a second flow transmitter, a second flow controller, and a second flow regulating valve. The second flow transmitter is used to detect the steam pipeline flow rate. The first flow meter can send the oil residue pipeline flow rate to the second flow controller. The second flow transmitter can send the steam pipeline flow rate to the second flow controller. The second flow controller is used to control the second flow regulating valve. The second flow regulating valve is used to control the steam pipeline flow rate.

[0009] In some embodiments, the steam pipeline has a first branch and a second branch, the first branch being connected to a gasifier and the second branch being connected to an oxygen mixer. The second branch is provided with a fourth control loop, which can adjust the flow rate of the second branch according to the steam flow rate data of the second flow transmitter.

[0010] In some embodiments, the fourth control loop includes a third flow transmitter, a third flow controller, and a third flow regulating valve. The third flow transmitter is used to detect the flow rate of the second branch. The second flow transmitter is capable of sending steam flow to the third flow transmitter. The third flow transmitter is capable of sending the flow rate of the second branch to the third flow controller. The third flow controller is capable of controlling the third flow regulating valve. The third flow regulating valve is used to control the flow rate of the second branch.

[0011] In some embodiments, the first branch is provided with a first flow-limiting orifice plate.

[0012] In some embodiments, the output end of the oxygen mixer is provided with a second flow meter, which is used to detect the flow rate of the mixed gas output by the oxygen mixer. The oxygen mixer has a third branch and a fourth branch downstream, which are connected in parallel and are both connected to the gasifier. The fourth branch is provided with a fifth control loop, which can adjust the flow rate of the fourth branch according to the flow rate of the mixed gas detected by the second flow meter in real time.

[0013] In some embodiments, the fifth control loop includes a fourth flow transmitter, a fourth flow controller, and a fourth flow regulating valve. The fourth flow transmitter is used to detect the flow rate of the fourth branch. The second flow meter is able to send the mixed gas flow rate to the fourth flow controller. The fourth flow transmitter is able to send the flow rate of the fourth branch to the fourth flow controller. The fourth flow controller is able to control the fourth flow regulating valve, which is used to control the flow rate of the fourth branch.

[0014] In some embodiments, the third branch is provided with a second flow-limiting orifice plate.

[0015] In some embodiments, the first control loop is further provided with a switching switch, which is used to start or stop the operation of lifting or lowering the load.

[0016] In some embodiments, the first control loop is further provided with a first limiter, which is used to limit the range of the set value of the oil residue flow controller.

[0017] In some embodiments, the third control loop further includes a second limiter for limiting the minimum value of the second flow controller setpoint.

[0018] In some embodiments, the fifth control loop is further provided with a third limiter, which is used to limit the minimum value of the fourth flow controller setpoint.

[0019] Compared to the aforementioned background technology, the automatic load control system for the oil residue gasification furnace provided in this application includes a first control loop, a second control loop, and a third control loop. The first control loop includes a rate controller, an oil residue flow controller, and a first flow meter. The rate controller is used to adjust the set value of the oil residue flow controller, which controls the feed pump to regulate the oil residue flow rate. The first flow meter is used to detect the flow rate in the oil residue pipeline. The second control loop includes a first flow transmitter, a first flow controller, and a first flow regulating valve. The first flow transmitter is used to detect the flow rate in the oxygen pipeline, and the first flow meter can transmit the flow rate of the oil residue pipeline. The first flow transmitter can send the oxygen pipeline flow rate to the first flow controller. The first flow controller is used to control the first flow regulating valve. The first flow regulating valve is used to control the oxygen pipeline flow rate. The third control loop includes a second flow transmitter, a second flow controller, and a second flow regulating valve. The second flow transmitter is used to detect the steam pipeline flow rate. The first flow meter can send the oil residue pipeline flow rate to the second flow controller. The second flow transmitter can send the steam pipeline flow rate to the second flow controller. The second flow controller is used to control the second flow regulating valve. The second flow regulating valve is used to control the steam pipeline flow rate.

[0020] During load increases and decreases, the rate controller receives the target load value set by the operator and adjusts the external setpoint of the sludge flow controller according to the preset load increase / decrease rate. The sludge flow controller receives the real-time sludge flow signal from the first flow meter, calculates it, and outputs a control signal to adjust the speed of the sludge feed pump, thereby changing the sludge feed flow rate. The real-time sludge flow data collected by the first flow meter is synchronously sent to the first flow controller, and the real-time oxygen pipeline flow data collected by the first flow transmitter is synchronously sent to the first flow controller. The first flow controller calculates the corresponding target setpoint for oxygen flow based on the preset oxygen-to-oil ratio process coefficient. The opening of the first flow regulating valve is controlled to automatically adjust the oxygen feed flow rate, ensuring that the oxygen flow rate always changes proportionally and synchronously with the oil residue flow rate, thus guaranteeing a stable oxygen-to-oil ratio throughout the gasification reaction. The real-time data of the oil residue flow rate collected by the first flow meter is synchronously sent to the second flow controller, and the real-time data of the steam pipeline flow rate collected by the second flow transmitter is synchronously sent to the second flow controller. The first flow controller calculates the target set value of the corresponding steam flow rate based on the preset steam-to-oil ratio process coefficient, and controls the opening of the second flow regulating valve according to the calculated target set value of the corresponding steam flow rate to automatically adjust the steam feed flow rate, ensuring that the steam flow rate always changes proportionally and synchronously with the oil residue flow rate, thus guaranteeing a stable steam-to-oil ratio throughout the gasification reaction.

[0021] The automatic load control system for the oil residue gasifier of this application uses the oil residue flow rate as the main control variable for load regulation. Oxygen and steam are automatically tracked by the change in oil residue flow rate through ratio calculation. Operators only need to set the target load and the acceleration / deceleration rate, and the system can automatically complete the synchronous proportioning adjustment of each material, eliminating the need for manual adjustment of pump speed and valve opening, thus reducing the frequency and difficulty of operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the automatic load control system for the oil residue gasifier according to an embodiment of this application.

[0024] in:

[0025] 100. Gasifier; 200. Feed pump; 300. Oil residue pipeline; 400. Oxygen source; 500. Oxygen pipeline; 600. Oxygen mixer; 700. Steam source; 800. Steam pipeline;

[0026] 11. Rate controller; 12. Oil residue flow controller; 13. First flow meter; 14. Switch; 15. First limiter; 21. First flow transmitter; 22. First flow controller; 23. First flow regulating valve; 31. Second flow transmitter; 32. Second flow controller; 33. Second flow regulating valve; 34. Second limiter; 41. Third flow transmitter; 42. Third flow controller; 43. Third flow regulating valve; 5. First flow limiting orifice plate; 6. Second flow meter; 71. Fourth flow transmitter; 72. Fourth flow controller; 73. Fourth flow regulating valve; 74. Third limiter; 8. Second flow limiting orifice plate. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0030] like Figure 1As shown in the embodiment of this application, the automatic load control system for the oil residue gasifier includes a first control loop, a second control loop, and a third control loop. The first control loop includes a rate controller 11, an oil residue flow controller 12, and a first flow meter 13. The rate controller 11 is used to adjust the set value of the oil residue flow controller 12, which can control the feed pump to adjust the oil residue flow rate. The first flow meter 13 is used to detect the flow rate of the oil residue pipeline. The second control loop includes a first flow transmitter 21, a first flow controller 22, and a first flow regulating valve 23. The first flow transmitter 21 is used to detect the flow rate of the oxygen pipeline, and the first flow meter 13 can send the oil residue pipeline flow rate to the first flow controller. 22. The first flow transmitter 21 can send the flow rate of the oxygen pipeline to the first flow controller 22. The first flow controller 22 is used to control the first flow regulating valve 23. The first flow regulating valve 23 is used to control the flow rate of the oxygen pipeline. The third control loop includes a second flow transmitter 31, a second flow controller 32, and a second flow regulating valve 33. The second flow transmitter 31 is used to detect the flow rate of the steam pipeline. The first flow meter 13 can send the flow rate of the oil residue pipeline to the second flow controller 32. The second flow transmitter 31 can send the flow rate of the steam pipeline to the second flow controller 32. The second flow controller 32 is used to control the second flow regulating valve 33. The second flow regulating valve 33 is used to control the flow rate of the steam pipeline.

[0031] Specifically, the gasifier process burner has multiple channels. The feed pump 200 is connected to one of the channels of the gasifier process burner 100 via the oil residue pipeline 300. The oxygen source 400 is connected to the oxygen mixer 600 via the oxygen pipeline 500. The steam source 700 is connected to the steam pipeline 800. The downstream of the steam pipeline 800 is divided into two paths. One path is connected to the oxygen mixer 600, and the other path is directly connected to one of the channels of the gasifier process burner 100. The downstream of the oxygen mixer 600 is divided into two paths, which are respectively connected to two different channels of the gasifier process burner.

[0032] Understandably, during load increases and decreases, the rate controller 11 receives the target load value set by the operator and adjusts the external setpoint of the oil residue flow controller 12 according to the preset load increase / decrease rate. The oil residue flow controller 12 receives the oil residue flow signal fed back in real time from the first flow meter 13, calculates it, and outputs a control signal to adjust the speed of the oil residue feed pump 200, thereby changing the oil residue feed flow rate. The real-time data of the oil residue flow rate collected by the first flow meter 13 is synchronously sent to the first flow controller 22, and the real-time data of the oxygen pipeline flow rate collected by the first flow transmitter 21 is synchronously sent to the first flow controller 22. The first flow controller 22 calculates the target setpoint of the corresponding oxygen flow rate according to the preset oxygen-oil ratio process coefficient. The first flow controller 22 calculates the corresponding oxygen flow rate target setpoint based on the calculated oxygen flow rate target setpoint. The target setpoint for the flow rate controls the opening of the first flow regulating valve 23, automatically adjusting the oxygen feed flow rate to ensure that the oxygen flow rate always changes proportionally and synchronously with the oil residue flow rate, guaranteeing a stable oxygen-to-oil ratio throughout the gasification reaction. Real-time data of the oil residue flow rate collected by the first flow meter 13 is synchronously sent to the second flow controller 32, and real-time data of the steam pipeline flow rate collected by the second flow transmitter 31 is synchronously sent to the second flow controller 32. The first flow controller 32 calculates the corresponding target setpoint for the steam flow rate based on a preset steam-to-oil ratio process coefficient, and controls the opening of the second flow regulating valve 33 based on this target setpoint, automatically adjusting the steam feed flow rate to ensure that the steam flow rate always changes proportionally and synchronously with the oil residue flow rate, guaranteeing a stable steam-to-oil ratio throughout the gasification reaction. In this application's automatic load control system for the oil residue gasifier, the oil residue flow rate is used as the main control variable for load regulation, and both oxygen and steam automatically track changes in the oil residue flow rate through ratio calculations. Operators only need to set the target load and lifting rate, and the system can automatically complete the synchronous proportioning adjustment of each material, eliminating the need for manual adjustment of pump speed and valve opening, thus reducing the frequency and difficulty of operation.

[0033] In some embodiments, the steam line 800 has a first branch and a second branch. The first branch is connected to the gasifier, and the second branch is connected to the oxygen mixer 600. The second branch is provided with a fourth control loop, which can adjust the flow rate of the second branch according to the steam flow rate data of the second flow transmitter 31.

[0034] Specifically, the main steam pipeline is divided into two parallel pipelines, the first branch and the second branch. The first branch is directly connected to the steam channel of the gasifier process burner, and the steam directly enters the burner to participate in the gasification reaction. The second branch is connected to the oxygen mixer 600, which is used to pre-mix the steam with oxygen evenly before sending it to the burner. A fourth control loop is set on the second branch. The fourth control loop can automatically adjust the steam flow of the second branch according to the steam flow data of the second flow transmitter 31, so as to realize the distribution of steam between the first branch and the second branch.

[0035] Based on the above embodiments, the fourth control loop includes a third flow transmitter 41, a third flow controller 42, and a third flow regulating valve 43. The third flow transmitter 41 is used to detect the flow of the second branch. The second flow transmitter 41 can send steam flow to the third flow controller 42. The third flow transmitter 41 can send the flow of the second branch to the third flow controller 42. The third flow controller 42 can control the third flow regulating valve 43. The third flow regulating valve is used to control the flow of the second branch.

[0036] Specifically, the real-time data of the total steam flow of the second flow transmitter 31 is sent to the third flow controller 42, and the real-time data of the second branch flow of the third flow transmitter 41 is sent to the third flow controller 42. The third flow controller 42 calculates the target set value of the steam flow of the second branch according to the preset oxygen channel steam ratio coefficient. The third flow controller 42 controls the opening of the third flow regulating valve 43 according to the calculated target set value of the steam flow of the second branch, thereby regulating the steam flow of the second branch and thus regulating the steam flow entering the oxygen mixer 600.

[0037] In some embodiments, the first branch is provided with a first flow-limiting orifice plate 5.

[0038] Specifically, the first flow-limiting orifice plate 5 is a fixed throttling element, with a fixed orifice diameter machined according to the design flow rate.

[0039] Understandably, the fourth control loop only needs to adjust the opening of the third flow regulating valve 43 on the second branch to indirectly adjust the flow of the first branch by changing the flow of the second branch. Combined with the fixed throttling characteristics of the first flow limiting orifice plate 5, the flow fluctuation of the first branch can be reduced and the stability of steam distribution can be improved.

[0040] In some embodiments, the output end of the oxygen mixer 600 is provided with a second flow meter 6, which is used to detect the flow rate of the mixed gas output by the oxygen mixer 600. Downstream of the oxygen mixer 600, there are a third branch and a fourth branch, which are connected in parallel and are both connected to the gasifier. The fourth branch is provided with a fifth control loop, which can adjust the flow rate of the fourth branch according to the flow rate of the mixed gas detected in real time by the second flow meter 6.

[0041] Specifically, a second flow meter 6 is installed on the output pipeline of the oxygen mixer 600. The second flow meter 6 is used to detect the flow rate of the total mixed gas after the oxygen and steam are mixed. The downstream pipeline of the oxygen mixer 600 is divided into two parallel pipelines, the third branch and the fourth branch. Both branches are connected to the process burners of the gasifier and correspond to the outer oxygen + steam channel and the central oxygen + steam channel, respectively. A fifth control loop is set on the fourth branch. The fifth control loop can automatically adjust the flow rate of the mixed gas in the fourth branch according to the total mixed gas flow rate data detected in real time by the second flow meter 6, so as to realize the proportional distribution of central oxygen + steam and outer oxygen + steam.

[0042] Based on the above embodiments, the fifth control loop includes a fourth flow transmitter 71, a fourth flow controller 72, and a fourth flow regulating valve 73. The fourth flow transmitter 71 is used to detect the flow of the fourth branch. The second flow meter 6 can send the mixed gas flow to the fourth flow controller 72. The fourth flow transmitter 71 can send the flow of the fourth branch to the fourth flow controller 72. The fourth flow controller 72 can control the fourth flow regulating valve 73. The fourth flow regulating valve 73 is used to control the flow of the fourth branch.

[0043] Understandably, the fifth control loop operates on the same principle as the fourth control loop. The fifth control loop can adjust the ratio of the mixed gas in the third and fourth branches, thereby keeping the distribution ratio of central oxygen and steam to outer ring oxygen and steam constant and avoiding burner flame distortion during load adjustment.

[0044] In some embodiments, the third branch is provided with a second flow-limiting orifice plate 8.

[0045] Specifically, the second flow-limiting orifice plate 8 is a fixed throttling element, with a fixed orifice diameter machined according to the design flow rate of the outer epoxy + steam.

[0046] Understandably, the fifth control loop only needs to adjust the opening of the fourth flow regulating valve 73 to indirectly adjust the flow of the outer epoxy and steam by changing the flow of the central oxygen and steam. Combined with the fixed throttling characteristics of the second flow limiting orifice plate 8, the flow fluctuation of the third branch can be greatly reduced, ensuring the stability of the basic flow of the outer epoxy and steam.

[0047] In some embodiments, the first control loop is further provided with a switching switch 14, which is used to start or stop the operation of lifting or lowering the load.

[0048] Understandably, when load adjustment is required, the operator sets the target load and lifting rate, then triggers the switching switch 14 to enter automatic mode. The system then automatically executes the automatic load adjustment process according to the preset rate. If abnormal operating conditions or parameter exceeding limits occur during the automatic lifting process, the operator can trigger the switching switch 14 at any time to immediately stop the automatic load lifting program.

[0049] In some embodiments, the first control loop is further provided with a first limiter 15, which is used to limit the range of the set value of the oil residue flow controller 12.

[0050] Understandably, the first limiter 15 has preset maximum and minimum load values ​​for the gasifier. When the target load input by the operator exceeds the limit range, the limiter will automatically limit the set value to within the allowable range to avoid overheating and overpressure caused by incorrect input of the set value or abnormal program, or flameout, coking, and other accidents caused by the load exceeding the upper limit.

[0051] In some embodiments, the third control loop is further provided with a second limiter 34, which is used to limit the minimum value of the set value of the second flow controller 32.

[0052] Understandably, when the system is operating at reduced load, the steam flow rate will decrease synchronously with the oil residue flow rate. The second limiter 34 can prevent the steam flow rate from falling below the minimum value, thus avoiding problems such as gasifier temperature runaway, insufficient burner cooling, and increased coking caused by insufficient steam.

[0053] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0054] The automatic load control system for the oil residue gasifier provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An automatic load control system for an oil residue gasification furnace, characterized in that, include: The first control loop includes a rate controller (11), an oil residue flow controller (12), and a first flow meter (13). The rate controller (11) is used to adjust the set value of the oil residue flow controller (12). The oil residue flow controller (12) can control the feed pump to adjust the oil residue flow rate. The first flow meter (13) is used to detect the flow rate of the oil residue pipeline. The second control loop includes a first flow transmitter (21), a first flow controller (22), and a first flow regulating valve (23). The first flow transmitter (21) is used to detect the flow rate of the oxygen pipeline. The first flow meter (13) can send the flow rate of the oil residue pipeline to the first flow controller (22). The first flow transmitter (21) can send the flow rate of the oxygen pipeline to the first flow controller (22). The first flow controller (22) is used to control the first flow regulating valve (23). The first flow regulating valve (23) is used to control the flow rate of the oxygen pipeline. The third control loop includes a second flow transmitter (31), a second flow controller (32), and a second flow regulating valve (33). The second flow transmitter (31) is used to detect the steam pipeline flow. The first flow meter (13) can send the oil residue pipeline flow to the second flow controller (32). The second flow transmitter (31) can send the steam pipeline flow to the second flow controller (32). The second flow controller (32) is used to control the second flow regulating valve (33). The second flow regulating valve (33) is used to control the steam pipeline flow.

2. The automatic load control system for the oil residue gasifier according to claim 1, characterized in that, The steam pipeline (800) has a first branch and a second branch. The first branch is connected to the gasifier, and the second branch is connected to the oxygen mixer (600). The second branch is provided with a fourth control loop, which can adjust the flow rate of the second branch according to the steam flow data of the second flow transmitter (31).

3. The automatic load control system for the oil residue gasifier according to claim 2, characterized in that, The fourth control loop includes a third flow transmitter (41), a third flow controller (42), and a third flow regulating valve (43). The third flow transmitter (41) is used to detect the flow of the second branch. The second flow transmitter (31) can send steam flow to the third flow controller (42). The third flow transmitter (41) can send the flow of the second branch to the third flow controller (42). The third flow controller (42) can control the third flow regulating valve (43). The third flow regulating valve is used to control the flow of the second branch.

4. The automatic load control system for the oil residue gasifier according to claim 3, characterized in that, The first branch is equipped with a first flow-limiting orifice plate (5).

5. The automatic load control system for the oil residue gasifier according to claim 4, characterized in that, The output end of the oxygen mixer (600) is provided with a second flow meter (6), which is used to detect the flow rate of the mixed gas output by the oxygen mixer (600). The oxygen mixer (600) has a third branch and a fourth branch downstream. The third branch and the fourth branch are connected in parallel and are both connected to the gasifier. The fourth branch is provided with a fifth control loop, which can adjust the flow rate of the fourth branch according to the flow rate of the mixed gas detected in real time by the second flow meter (6).

6. The automatic load control system for the oil residue gasifier according to claim 5, characterized in that, The fifth control loop includes a fourth flow transmitter (71), a fourth flow controller (72), and a fourth flow regulating valve (73). The fourth flow transmitter (71) is used to detect the flow of the fourth branch. The second flow meter (6) can send the mixed gas flow to the fourth flow controller (72). The fourth flow transmitter (71) can send the flow of the fourth branch to the fourth flow controller (72). The fourth flow controller (72) can control the fourth flow regulating valve (73). The fourth flow regulating valve (73) is used to control the flow of the fourth branch.

7. The automatic load control system for the oil residue gasifier according to claim 6, characterized in that, The third branch is equipped with a second flow-limiting orifice plate (8).

8. The automatic load control system for the oil residue gasifier according to claim 1, characterized in that, The first control circuit is also provided with a switching switch (14), which is used to start or stop the operation of lifting or lowering the load.

9. The automatic load control system for the oil residue gasifier according to claim 1, characterized in that, The first control loop is further provided with a first limiter (15), which is used to limit the range of the set value of the oil residue flow controller (12).

10. The automatic load control system for the oil residue gasifier according to claim 1, characterized in that, The third control loop is further provided with a second limiter (34), which is used to limit the minimum value of the set value of the second flow controller (32).

11. The automatic load control system for the oil residue gasifier according to claim 1, characterized in that, The fifth control loop is further provided with a third limiter (74), which is used to limit the minimum value of the set value of the fourth flow controller (72).

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