Fuel feeding device and control method

Abstract

The invention discloses a fuel feeding device and a control method, and the fuel feeding device comprises a feeding pipeline which is provided with at least one air inlet; the input end of the air supply pipeline is connected with the air supply device; the input end of the at least one air supply adjusting structure is in sealed connection with the at least one air inlet of the feeding pipeline and the output end of the at least one air supply pipeline; wherein the output end of the air supply adjusting structure extends along an output axis and extends into the feeding pipeline, and an included angle is formed between the output axis and the input axis; air flow in the air supply pipeline can be output into the feeding pipeline through the air supply adjusting structure, and the input end of the air supply adjusting structure can drive the output end of the air supply adjusting structure to rotate around the input axis so as to change the output angle of the output end of the air supply adjusting structure. The uniformity of fuel entering the combustion chamber can be improved, the combustion efficiency of the fuel and the stability of the combustion chamber are guaranteed, and blockage caused by uneven distribution of the fuel in the feeding pipeline can be prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel feeding, and in particular to a fuel feeding device and a control method. Background Art

[0002] In the existing boiler operation system, the supply of fuel is the key factor to ensure efficient energy conversion. Therefore, it is necessary to ensure that the fuel is isolated from the outside air before entering the combustion chamber to avoid preheating losses and unnecessary environmental pollution.

[0003] Traditional boiler fuel feeding devices usually use fixed sealing components installed in the feed pipe, such as a bellows or air duct, to deliver fuel into the combustion chamber through the feed pipe. However, this design has some limitations. Due to the different types and physical properties of fuel, it will affect the distribution of fuel in the feed pipe, which in turn will affect the distribution of fuel in the combustion chamber, thus affecting the operation of the equipment. Summary of the invention

[0004] The object of the present invention is to provide a fuel feeding device and a control method to solve the technical problem that the fuel is unevenly distributed in the feeding pipeline and the combustion chamber, thereby affecting the operation of the equipment.

[0005] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The present invention provides a fuel feeding device, comprising: a feeding pipe, whose input end is connected to a feeding device, whose output end is connected to a combustion chamber, and wherein the feeding pipe is provided with at least one air inlet; at least one air supply pipe, whose input end is connected to the air supply device; at least one air supply regulating structure, whose input end is respectively sealed and connected to at least one of the air inlets of the feeding pipe and at least one of the output ends of the air supply pipe, and the input end of the air supply regulating structure can be rotatably arranged around an input axis; wherein the output end of the air supply regulating structure is extended along an output axis and extends into the feeding pipe, and an angle is formed between the output axis and the input axis; the airflow in the air supply pipe can be output into the feeding pipe via the air supply regulating structure, and the input end of the air supply regulating structure can drive the output end of the air supply regulating structure to rotate around the input axis to change the output angle of the output end of the air supply regulating structure.

[0007] In an embodiment of the present invention, the number of the air supply ducts, the number of the air supply regulating structures and the number of the air inlets are correspondingly set to be multiple, the multiple air inlets are arranged at intervals along the circumference of the feed duct, and the input ends of the multiple air supply regulating structures are correspondingly installed at the multiple air inlets and correspondingly connected to the multiple air supply ducts.

[0008] In an embodiment of the present invention, the plurality of air inlets are arranged toward an upper region of the feed pipe, and the output ends of the plurality of air supply regulating structures extend from the plurality of air inlets into the feed pipe from top to bottom.

[0009] In an embodiment of the present invention, the input end of the air supply regulating structure is installed at the air inlet through a rotating connector, the input end of the rotating connector is connected to the air supply duct, and the output end of the rotating connector is provided with an regulating air duct, which is extended along the output axis.

[0010] In an embodiment of the present invention, a nozzle is installed at the output end of the regulating air duct.

[0011] In an embodiment of the present invention, the rotary connector includes an outer joint, an inner joint, a fixed joint and a rotating bearing, the outer joint is connected to the air supply duct, the inner joint is connected to the regulating air duct, the outer joint and the inner joint are connected through the fixed joint, and the fixed joint is rotatably mounted at the air inlet of the feed pipe through the rotating bearing.

[0012] In an embodiment of the present invention, the rotating bearing includes a static ring and a dynamic ring that are rotatably matched, the fixed node is clamped on the dynamic ring, and the static ring is fixed at the air inlet; the static ring of the rotating bearing is sealed with the air inlet via a static sealing structure, and the fixed node is sealed with the dynamic ring of the rotating bearing via a dynamic sealing structure; the static sealing structure includes a matching sealing groove and a sealing ring, the sealing groove is arranged on the outer wall surface of the static ring or the inner wall surface of the air inlet along the circumference of the rotating bearing, and the sealing ring is installed in the sealing groove; the dynamic sealing structure includes a sealing ring made of flexible graphite material, the sealing ring is sleeved on the fixed node and is sealingly slidably matched with the inner wall surface of the dynamic ring.

[0013] In an embodiment of the present invention, the fuel feeding device further includes a manual driving structure and / or an automatic driving structure, the rotary connector has an operating portion located outside the feeding pipe, the manual driving structure and / or the automatic driving structure is connected to the operating portion and can drive the rotary connector to rotate around the input axis; the fuel feeding device further includes a control structure, the control structure is electrically connected to the automatic driving structure, and the control structure is used to control the automatic driving structure to drive the rotary connector to rotate around the input axis.

[0014] The present invention also provides a control method for controlling the above-mentioned fuel feeding device, and the control method includes the following steps: collecting the current operating parameters of the combustion chamber; wherein the current operating parameters include the current combustion state and the current combustion temperature; judging whether it is necessary to adjust the output angle of the air supply adjustment structure according to the current operating parameters and preset judgment conditions; if so, determining the rotation angle of the air supply adjustment structure, and rotating the air supply adjustment structure according to the rotation angle.

[0015] In an embodiment of the present invention, determining the rotation angle of the air supply regulating structure includes the following steps: acquiring historical operating parameters of the combustion chamber and equipment parameters of the fuel feeding device; and determining the rotation angle of the air supply regulating structure based on the current operating parameters, the historical operating parameters and the equipment parameters.

[0016] The characteristics and advantages of the present invention are:

[0017] The fuel feeding device of the present invention is connected to the output end of the air supply pipe by arranging an air supply regulating structure that can rotate around an input axis at the air inlet of the feed pipe, and the output axis of the air supply regulating structure extending from the output end of the feed pipe has an angle with the input axis, so that when the air supply regulating structure rotates around the input axis, the direction of the output end of the air supply regulating structure can be changed, thereby changing the output angle of the output end of the air supply regulating structure, and thus changing the flow direction of the air flow in the air supply pipe into the feed pipe through the air supply regulating structure, thereby utilizing air flows in different directions to change the distribution and flow direction of the fuel in the feed pipe, thereby changing the direction in which the fuel flows from the outlet of the feed pipe into the combustion chamber and the distribution of the fuel in the combustion chamber, thereby improving the uniformity of the fuel entering the combustion chamber, ensuring the combustion efficiency of the fuel and the stability of the combustion chamber, and preventing blockage caused by uneven distribution of the fuel in the feed pipe.

[0018] The control method of the present invention collects the current operating parameters of the combustion chamber, and then determines whether it is necessary to adjust the output angle of the air supply adjustment structure according to the current operating parameters, thereby ensuring that the operation of the combustion chamber meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a front view structural schematic diagram of the fuel feeding device in the present invention;

[0021] Figure 2 A top view of the feed pipe in the present invention;

[0022] Figure 3 It is a side structural schematic diagram of the fuel feeding device in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the air supply adjustment structure in the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the rotary connector in the present invention.

[0025] In the figure:

[0026] 1. Air supply duct; 2. Feed duct; 21. Air inlet; 3. Air supply adjustment structure; 31. Rotary connector; 311. External joint; 312. Internal joint; 313. Fixed joint; 314. Sealing ring; 32. Adjusting air duct; 33. Nozzle. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Implementation Method 1

[0029] like Figure 1 As shown, the present invention provides a fuel feeding device, comprising: a feeding pipeline 2, whose input end is connected to the feeding device, and whose output end is connected to the combustion chamber, and at least one air inlet 21 is provided on the feeding pipeline 2; at least one air supply pipeline 1, whose input end is connected to the air supply device; at least one air supply regulating structure 3, whose input end is respectively sealed and connected to at least one air inlet 21 of the feeding pipeline 2 and the output end of at least one air supply pipeline 1, and the input end of the air supply regulating structure 3 can be rotatably arranged around an input axis Z1; wherein the output end of the air supply regulating structure 3 is extended along an output axis Z2 and extends into the feeding pipeline 2, and there is an angle between the output axis Z2 and the input axis Z1 The airflow in the air supply duct 1 can be output to the feed duct 2 through the air supply regulating structure 3. The input end of the air supply regulating structure 3 can drive the output end of the air supply regulating structure 3 to rotate around the input axis Z1 to change the output angle of the output end of the air supply regulating structure 3.

[0030] The fuel feeding device of the present invention is connected to the output end of the air supply pipe 1 by arranging an air supply adjustment structure 3 that can rotate around the input axis Z1 at the air inlet 21 of the feed pipe, and the output axis Z2 of the air supply adjustment structure 3 extending from the output end of the feed pipe 2 and the input axis Z1 have an angle When the air supply regulating structure 3 rotates around the input axis Z1, the direction of the output end of the air supply regulating structure 3 can be changed, thereby changing the output angle of the output end of the air supply regulating structure 3, and thus changing the flow direction of the airflow in the air supply duct 1 flowing into the feed duct 2 through the air supply regulating structure 3, thereby using the airflow in different directions to change the distribution and flow direction of the fuel in the feed duct 2, and then changing the direction of the fuel flowing from the outlet of the feed duct 2 into the combustion chamber and the distribution of the fuel in the combustion chamber, thereby improving the uniformity of the fuel entering the combustion chamber, ensuring the combustion efficiency of the fuel and the stability of the combustion chamber, and preventing the fuel from being unevenly distributed in the feed duct 2 and causing blockage. It should be noted that the fuel feeding device of the present invention includes but is not limited to being applied to a boiler operation system.

[0031] Specifically, the angle between the output axis Z2 and the input axis Z1 is The angle is not particularly limited, but is preferably 30 degrees to 60 degrees.

[0032] like Figure 2 and Figure 3 As shown, in the embodiment of the present invention, the number of air supply ducts 1, the number of air supply adjustment structures 3 and the number of air inlets 21 are correspondingly set to multiple, the multiple air inlets 21 are arranged at intervals along the circumference of the feed duct 2, and the input ends of the multiple air supply adjustment structures 3 are correspondingly installed at the multiple air inlets 21 and are correspondingly connected to the multiple air supply ducts 1. By arranging multiple air inlets 21 at intervals along the circumference of the feed duct 2 and installing multiple air supply adjustment structures 3 and correspondingly connecting to the multiple air supply ducts 1, on the one hand, the airflow output by the multiple air supply adjustment structures 3 can be used to change the fuel distribution in different areas of the feed duct 2, further improving the uniformity of the distribution of the fuel in the feed duct 2, and on the other hand, the airflow output by the multiple air supply adjustment structures 3 can generate greater conveying power to deliver the fuel in the feed duct 2 into the combustion chamber.

[0033] Specifically, multiple air inlets 21 are arranged toward the upper area of ​​the feed pipe 2, and the output ends of the multiple air supply adjustment structures 3 extend from the multiple air inlets 21 into the feed pipe 2 from top to bottom, thereby preventing fuel from falling into the air supply pipe 1 from the air inlets 21.

[0034] Combination Figure 1 and Figure 4As shown, in the embodiment of the present invention, the input end of the air supply regulating structure 3 is installed at the air inlet 21 through a rotating connector 31, the input end of the rotating connector 31 is connected to the air supply duct 1, and the output end of the rotating connector 31 is provided with an adjusting air duct 32, and the adjusting air duct 32 is extended along the output axis Z2. Specifically, a nozzle 33 is installed at the output end of the adjusting air duct 32. By setting the nozzle 33, the effective area of ​​the airflow after being output from the output end of the adjusting air duct 32 can be increased, which is conducive to further improving the uniformity of the fuel distribution in the feed pipe 2. The nozzle direction of the nozzle 33 can be set along the output axis Z2, and can also be set at a certain angle relative to the output axis Z2.

[0035] Combination Figure 1 and Figure 4 As shown, in some embodiments of the present invention, the air supply duct rotates synchronously with the regulating air duct 32 around the input axis Z1 through the rotary connector 31. Figure 5 As shown, the rotary connector 31 includes an outer joint 311, an inner joint 312, a fixed joint 313 and a rotating bearing. The outer joint 311 is connected to the air supply duct 1, and the inner joint 312 is connected to the regulating air duct 32. The outer joint 311 and the inner joint 312 are connected via the fixed joint 313. The fixed joint 313 is rotatably installed at the air inlet of the feed pipe 2 via a rotating bearing, so that the air supply duct 1 can rotate around the input axis Z1 to change the output angle of the regulating air duct 32.

[0036] Specifically, the rotating bearing includes a static ring and a dynamic ring that are rotatably matched, the fixed joint 313 is clamped on the dynamic ring, and the static ring is fixed at the air inlet. To ensure the sealing performance, the static ring of the rotating bearing is sealed and connected to the air inlet 21 through a static sealing structure, and the fixed joint 313 is sealed and connected to the dynamic ring of the rotating bearing through a dynamic sealing structure. The static sealing structure includes a matching sealing groove and a sealing ring, the sealing groove is arranged on the outer wall surface of the static ring or the inner wall surface of the air inlet 21 along the circumference of the rotating bearing, and the sealing ring is installed in the sealing groove; the dynamic sealing structure includes a sealing ring made of flexible graphite material, and the sealing ring 314 is sleeved on the fixed joint 313 and is sealed and slidably matched with the inner wall surface of the dynamic ring. Among them, the sealing ring is a high temperature resistant and wear resistant sealing ring. In order to improve the sealing performance of the rotating connector 31, a sealing gasket is arranged between the static ring and the dynamic ring, so that the sealing effect can be maintained when the dynamic ring of the rotating bearing rotates with the fixed joint 313 to prevent dust or gas leakage.

[0037] In some other embodiments of the present invention, the air supply duct 1 is fixedly arranged, and only the rotary connector 31 and the regulating air duct 32 rotate synchronously around the input axis Z1. The rotary connector 31 includes a fixed joint, a rotary joint and a rotating bearing. The fixed joint is fixed on the feed duct 2 and is sealed and connected to the air inlet 21 through a static sealing structure. The rotary joint is inserted into the fixed joint and rotates with the fixed joint through a rotating bearing. The input end of the rotary joint can be rotatably sleeved on the output end of the air supply duct 1 around the input axis Z1, and a dynamic sealing structure is provided between the input end of the rotary joint and the input end of the air supply duct 1. The output end of the rotary joint is connected to the input end of the regulating air duct 32.

[0038] Specifically, the static sealing structure includes a matching sealing groove and a sealing ring. The sealing groove is arranged on the outer wall surface of the fixed joint or the inner wall surface of the air inlet 21 along the circumference of the fixed joint, and the sealing ring is installed in the sealing groove; the dynamic sealing structure includes a sealing ring made of flexible graphite material. Among them, the sealing ring is a high temperature resistant and wear-resistant sealing ring. The rotating bearing includes a rotatably matched static ring and a dynamic ring. The fixed joint is connected to the static ring, and the rotating joint is connected to the dynamic ring. In order to improve the sealing performance of the rotating connector 31, a sealing gasket is provided between the static ring and the dynamic ring, so that the sealing effect can be maintained when the dynamic ring of the rotating bearing rotates with the rotating joint to prevent dust or gas leakage.

[0039] Combination Figure 1 and Figure 4 As shown, in an embodiment of the present invention, the fuel feeding device also includes a manual driving structure and / or an automatic driving structure, and the rotary connector 31 has an operating part located outside the feeding pipe 2. The manual driving structure and / or the automatic driving structure is connected to the operating part and can drive the rotary connector 31 to rotate around the input axis Z.

[0040] Specifically, the fuel feeding device further includes a control structure, which is electrically connected to the automatic driving structure, and the control structure is used to control the automatic driving structure to drive the rotary joint to rotate around the input axis Z1. The control structure can use the control method in the second embodiment to control the automatic driving structure to drive the rotary joint to rotate around the input axis Z1, so as to adjust the output angle of the air supply adjustment structure 3.

[0041] In addition, the air supply adjustment structure also includes an angle sensor installed on the rotary connector 31, and the angle sensor is used to detect the angle of rotation of the rotary connector 31 around the input axis Z; the control structure is electrically connected to the angle sensor to realize the transmission of the detection signal of the angle sensor and the transmission of electric energy, and the control structure can control the working state of the automatic drive structure according to the detection signal of the angle sensor. Among them, the control structure is electrically connected to the angle sensor and the automatic drive structure through a set of wires.

[0042] In one embodiment of the present invention, the automatic drive structure includes a motor, a turbine and a worm. The turbine is sleeved on the operating part, and the worm is arranged on the rotating shaft of the motor along the tangential direction of the turbine and is meshed with the turbine. The rotating shaft of the motor drives the worm to rotate, and the turbine rotates under the drive of the worm and drives the rotary connector 31 to rotate synchronously.

[0043] In another embodiment of the present invention, the automatic driving structure includes a telescopic driving member, a gear and a rack. The gear is sleeved on the operating part, and the rack is arranged on the movable end of the telescopic driving member along the tangential direction of the gear and is meshed with the rack. The movable end of the telescopic driving member is telescoped along the tangential direction of the gear and drives the rack to move synchronously. The gear rotates under the drive of the rack and drives the rotating connector 31 to rotate synchronously.

[0044] Implementation Method 2

[0045] The present invention also provides a control method for controlling a fuel feeding device. The specific structure, working principle and beneficial effects of the fuel feeding device in this embodiment are the same as those of the fuel feeding device in the first embodiment, and will not be described in detail here.

[0046] The control method of the present invention comprises the following steps: collecting the current operating parameters of the combustion chamber; wherein the current operating parameters include the current combustion state and the current combustion temperature; judging whether it is necessary to adjust the output angle of the air supply adjustment structure 3 according to the current operating parameters and the preset judgment conditions; if so, determining the rotation angle of the air supply adjustment structure 3, and rotating the air supply adjustment structure 3 according to the rotation angle. Specifically, the preset judgment conditions include a temperature threshold and a pressure range.

[0047] The control method of the present invention collects the current operating parameters of the combustion chamber, and then determines whether it is necessary to adjust the output angle of the air supply adjustment structure 3 according to the current operating parameters, thereby ensuring that the operation of the combustion chamber meets the requirements.

[0048] Specifically, a temperature sensor and a pressure sensor are installed in the combustion chamber, so that the temperature and pressure of the combustion chamber can be collected in real time. In the embodiment of the present invention, a plurality of temperature sensors are installed in the combustion chamber, which are respectively located at different heights of the combustion chamber to monitor the temperature of different height areas; in addition, another temperature sensor is installed at the fuel feed port of the combustion chamber to monitor the initial temperature of the fuel; a plurality of temperature sensors are installed in the flue gas channel connected to the combustion chamber, and the plurality of temperature sensors are distributed at different positions along the conveying direction of the flue gas channel to monitor the distribution of flue gas temperature in the flue gas channel; temperature sensors are also installed at the preset positions of the water-cooled wall and the superheater in the boiler operation system to monitor the temperature changes of the water-cooled wall and the superheater; a temperature sensor is also installed on the return water pipeline in the boiler operation system to monitor the return water temperature. A pressure sensor is installed in the combustion chamber to monitor the pressure in the combustion chamber; at least one pressure sensor is installed in the feed pipe to monitor the fuel delivery pressure; at least one pressure sensor is installed at the inlet and outlet of the air preheater in the boiler operation system to monitor the air flow pressure; at least one pressure sensor is installed before and after the dust collector of the flue gas treatment system connected to the flue gas channel to monitor the flue gas flow state in the flue gas treatment system; at least one pressure sensor is also installed on the pipes before and after the boiler safety valve to monitor the working state of the boiler safety valve; at least one pressure sensor is also installed at a preset position of the water supply pipe in the boiler operation system to monitor the water supply pressure; at least one pressure sensor is installed at the main steam outlet in the boiler operation system to monitor the steam pressure; at least one pressure sensor is installed at a preset position of the boiler water level control system to monitor water level changes.

[0049] In an embodiment of the present invention, determining the rotation angle of the air supply regulating structure 3 includes the following steps: obtaining the historical operating parameters of the combustion chamber and the equipment parameters of the fuel feeding device; determining the rotation angle of the air supply regulating structure 3 based on the current operating parameters, historical operating parameters and equipment parameters.

[0050] In a specific embodiment of the present invention, the current operating parameters include the current combustion state and the current combustion temperature, wherein the current combustion state is determined by monitoring the flame color of the combustion chamber. During the operation of an industrial boiler, when the current combustion state of the combustion chamber is that the flame color is dark and the combustion temperature is lower than the normal level, it is determined that the combustion chamber is not fully burned; therefore, if such insufficient combustion occurs when there is no significant fluctuation in the fuel quality, ambient temperature, and load conditions, it is determined that the air supply regulating structure 3 needs to be rotated to change its output angle to improve the combustion effect. The historical operating parameters include the historical combustion state, the corresponding historical combustion temperature, and the corresponding output angle, and the equipment parameters include the rotation range of the air supply regulating structure 3 and the rotation accuracy of the air supply regulating structure 3.

[0051] First, different weights are assigned to the current operating parameters, historical operating parameters, and equipment parameters. For example, the weight of the current operating parameters is 0.5, the weight of the historical operating parameters is 0.3, and the weight of the equipment parameters is 0.2. Assuming that the rotation angle is 20 degrees according to the current operating parameters, 15 degrees according to the historical operating parameters, and 18 degrees according to the equipment parameters, the maximum allowable rotation angle is 18 degrees, then the optimal rotation angle is calculated as: (20×0.5+15×0.3+18×0.2)=10+4.5+3.6=18.1 degrees. Since the rotation accuracy of the air supply adjustment structure 3 is 5 degrees, the optimal rotation angle finally determined is 20 degrees.

[0052] In another specific embodiment of the present invention, it is also possible to determine whether it is necessary to rotate the air supply regulating structure 3 to change its output angle by detecting the temperature inside the boiler; for example, when the temperature inside the boiler is lower than 800°C, it is determined that it is necessary to rotate the air supply regulating structure 3 to change its output angle, thereby increasing its output angle and increasing the air supply volume, thereby improving the temperature in the combustion chamber and the combustion efficiency.

[0053] In another specific embodiment of the present invention, it is also possible to determine whether it is necessary to rotate the air supply regulating structure 3 to change its output angle by detecting the composition of the flue gas; for example, the flue gas analyzer detects that the CO2 concentration decreases and the O2 concentration increases, indicating incomplete combustion, and then determines that it is necessary to rotate the air supply regulating structure 3 to change its output angle, and then adjust the output angle of the air supply regulating structure 3 so that the air can be more evenly distributed on the fuel, so as to improve the combustion efficiency of the combustion chamber.

[0054] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A fuel feeding device, characterized in that: include: A feed pipe, the input end of which is connected to the feed device, the output end of which is connected to the combustion chamber, and the feed pipe is provided with at least one air inlet; At least one air supply duct, the input end of which is connected to the air supply device; At least one air supply regulating structure, whose input end is respectively sealed with at least one air inlet of the feed pipe and at least one output end of the air supply pipe, and the input end of the air supply regulating structure is rotatably arranged around an input axis; Among them, the output end of the air supply regulating structure is extended along an output axis and extends into the feed pipe, and there is an angle between the output axis and the input axis; the airflow in the air supply pipe can be output to the feed pipe through the air supply regulating structure, and the input end of the air supply regulating structure can drive the output end of the air supply regulating structure to rotate around the input axis to change the output angle of the output end of the air supply regulating structure.

2. The fuel feeding device according to claim 1, characterized in that: The number of the air supply ducts, the number of the air supply regulating structures and the number of the air inlets are correspondingly set to be multiple, the multiple air inlets are arranged at intervals along the circumference of the feed duct, and the input ends of the multiple air supply regulating structures are correspondingly installed at the multiple air inlets and correspondingly connected to the multiple air supply ducts.

3. The fuel feeding device according to claim 1, characterized in that: The plurality of air inlets are arranged toward the upper area of ​​the feed pipe, and the output ends of the plurality of air supply regulating structures extend from the plurality of air inlets into the feed pipe from top to bottom.

4. The fuel feeding device according to claim 1, characterized in that: The input end of the air supply regulating structure is installed at the air inlet through a rotating connector, the input end of the rotating connector is connected to the air supply duct, and the output end of the rotating connector is provided with a regulating air duct, which is extended along the output axis.

5. The fuel feeding device according to claim 4, characterized in that: A nozzle is installed at the output end of the regulating air duct.

6. The fuel feeding device according to claim 4, characterized in that: The rotary connector includes an outer joint, an inner joint, a fixed joint and a rotating bearing. The outer joint is connected to the air supply duct, the inner joint is connected to the regulating air duct, the outer joint and the inner joint are connected through the fixed joint, and the fixed joint is rotatably mounted at the air inlet of the feed duct through the rotating bearing.

7. The fuel feeding device according to claim 6, characterized in that: The rotating bearing comprises a stationary ring and a dynamic ring which are rotatably matched, the fixed joint is clamped on the dynamic ring, and the stationary ring is fixed at the air inlet; the stationary ring of the rotating bearing is sealed with the air inlet through a static sealing structure, and the fixed joint is sealed with the dynamic ring of the rotating bearing through a dynamic sealing structure; The static sealing structure comprises a matching sealing groove and a sealing ring, wherein the sealing groove is arranged on the outer wall surface of the static ring or the inner wall surface of the air inlet along the circumference of the rotating bearing, and the sealing ring is installed in the sealing groove; The dynamic sealing structure comprises a sealing ring made of a flexible graphite material, which is sleeved on the fixed joint and slidingly matched with the inner wall surface of the dynamic ring.

8. The fuel feeding device according to claim 4, characterized in that: The fuel feeding device further comprises a manual driving structure and / or an automatic driving structure, the rotary connector has an operating portion located outside the feeding pipe, and the manual driving structure and / or the automatic driving structure are connected to the operating portion to drive the rotary connector to rotate around the input axis; The fuel feeding device further comprises a control structure, wherein the control structure is electrically connected to the automatic driving structure, and the control structure is used to control the automatic driving structure to drive the rotary connector to rotate around the input axis.

9. A control method, characterized in that: Used to control the fuel feeding device according to any one of claims 1 to 8, the control method comprises the following steps: Collecting current operating parameters of the combustion chamber; wherein the current operating parameters include current combustion state and current combustion temperature; According to the current operating parameters, determining whether it is necessary to adjust the output angle of the air supply adjustment structure; If so, the rotation angle of the air supply adjustment structure is determined, and the air supply adjustment structure is rotated according to the rotation angle.

10. The control method according to claim 9, characterized in that: Determining the rotation angle of the air supply adjustment structure comprises the following steps: Acquiring historical operating parameters of the combustion chamber and equipment parameters of the fuel feeding device; The rotation angle of the air supply adjustment structure is determined according to the current operating parameters, the historical operating parameters and the equipment parameters.

Images