A heavy oil burner clean combustion system and combustion control method and burner

Abstract

The present application discloses a kind of heavy oil burner clean combustion system and combustion control method and burner, system includes: oil gun, ignition gun, photoelectric sensor and controller;The air inlet pipe of the oil gun is connected with gas tee valve, and oil inlet pipe is connected with fuel oil tee valve;The inlet of gas tee valve is connected with compressed air branch and fuel gas source branch respectively, and the outlet is connected with oil gas branch pipe branch;The inlet of fuel oil tee valve is connected with fuel oil branch and oil gas branch pipe branch respectively, and the outlet is connected with oil inlet pipe;The inlet of fuel gas source branch is connected with fuel gas branch, and the outlet of fuel gas branch is also connected with ignition branch;Switch valve is arranged in each branch described above;Photoelectric sensor is used to detect whether flame exists;The signal input end of the controller is connected with photoelectric sensor, and signal output end is connected with each switch valve.The present application has high ignition success rate, oil mist is fully combusted, avoids fuel coking, clogs nozzle drying drum and dust cloth bag, and prevents temperature from being too high to damage cloth bag.

Description

Technical Field

[0001] This invention belongs to the field of road construction machinery technology, and more specifically, relates to a clean combustion system and combustion control method for a heavy oil burner, as well as the burner itself. Background Technology

[0002] Currently, most asphalt mixing plants both domestically and internationally use fuel oil burners. To reduce production costs, they typically use cheaper heavy oil or residual oil as fuel. Heavy oil and residual oil are of poor quality, containing many impurities and having high viscosity. This frequently causes blockages in the burner's oil lines and nozzles. Furthermore, heavy oil has poor atomization, leading to ignition difficulties, a high failure rate, and the production of large amounts of dense smoke during ignition. Incomplete combustion causes fuel coking, clogging the nozzles, wasting energy and shortening the burner's lifespan. When the burner stops igniting, the oil line is cut off, and compressed air is introduced for purging. However, the discontinuous oil mist created by the compressed air purging causes the flame to extinguish, leaving a large amount of unburned fuel in the oil lines. This unburned fuel then enters the drying drum and secondary dust collector bags under the influence of the induced draft system, contaminating the drums and clogging the bags. This results in a significant increase in dust collector pressure drop, reduced overall mixing plant output, increased energy consumption, and shortened filter bag lifespan.

[0003] like Figure 1 The diagram shown is a simplified representation of a current fuel oil burner. A fuel oil burner mainly consists of an air supply system, a combustion system, and a combustion chamber. The combustion system primarily includes an ignition device, an atomizing fuel gun, a fuel oil source, a compressed air source, and a fuel gas source. The fuel gas source is an independent unit and only enters the ignition gun; the compressed air source, under the control of a three-way switch, can enter either the fuel oil circuit or the gas circuit of the fuel gun.

[0004] Chinese invention patent application (application number CN201510885624.0) describes a common operating mode for burners in asphalt mixing plants. During startup, compressed air enters the air circuit, and fuel enters the oil circuit. The fuel and compressed air mix and atomize inside the oil gun. The atomized fuel is then sprayed out and ignited by the ignition flame. When stopping operation, the oil circuit switch is first closed, and compressed air enters the oil circuit to purge any remaining fuel, preventing blockage of the oil gun and pipeline. However, this technical solution suffers from several drawbacks. During ignition, the heavy residue oil is difficult to atomize and ignite, leading to problems such as coking at the oil gun head. Furthermore, the post-purge process during shutdown results in a large amount of oil mist being sprayed from the oil circuit. This unburned oil mist enters the downstream drying drum and dust collector bags, contaminating the drums and clogging the bags. This leads to a significant increase in dust collector pressure drop, reduced overall mixing plant output, increased energy consumption, and shortened filter bag life. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned shortcomings by providing a clean combustion system and combustion control method for heavy oil burners, as well as a burner that offers high ignition success rate, complete oil mist combustion, avoids fuel coking, and prevents clogging of nozzles, drying drums, and dust collector bags, thus preventing damage to the dust collector bags due to excessive temperature.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, the present invention provides a clean combustion system for a heavy oil burner, comprising: an oil gun, an ignition gun, a photoelectric sensor, and a controller;

[0008] The air inlet pipe of the fuel gun is connected to a gas three-way valve, and the fuel inlet pipe is connected to a fuel three-way valve; the inlet of the gas three-way valve is connected to the gas source branch and the compressed air branch respectively, and the outlet is connected to the gas-fuel branch; the inlet of the fuel three-way valve is connected to the fuel branch and the gas-fuel branch respectively, and the outlet is connected to the fuel inlet pipe; the inlet of the gas source branch is connected to the gas branch, and the outlet of the gas branch is also connected to the ignition branch leading to the ignition gun;

[0009] Each of the gas source branch, ignition branch, gas branch, fuel oil branch, oil and gas branch pipe branch and compressed air branch is equipped with a switch valve;

[0010] The photoelectric sensor is used to detect the presence of a flame (i.e., whether the gas / atomized fuel of the ignition gun and the fuel gun is ignited) and transmits the signal to the controller;

[0011] The signal input terminal of the controller is connected to a photoelectric sensor, and the signal output terminal is connected to each switching valve.

[0012] Furthermore, the ignition gun ignites the gas through an ignition electrode, which releases an electric spark to ignite the gas.

[0013] Furthermore, each of the fuel branch, gas branch, and compressed air branch is equipped with a pressure regulating valve and a pressure sensor. The pressure regulating valve and pressure sensor are all connected to a controller to monitor and regulate the gas pressure entering the fuel gun.

[0014] Furthermore, the fuel branch also includes a fuel source and a fuel pump, the fuel pump being connected to a controller. The fuel source is a fuel tank.

[0015] Furthermore, the gas branch also includes a gas source.

[0016] Furthermore, the compressed air branch also includes an air compressor and an air tank, with the air compressor connected to a controller.

[0017] Furthermore, the oil and gas branch line also includes an oil and gas branch pipe, and the inlet of the air inlet pipe is connected to the oil and gas branch pipe via a T-joint.

[0018] Furthermore, the controller is preferably an industrial computer, and all the aforementioned actuators and sensors are connected to the industrial computer via signal lines; the controller is also connected to a host computer, and is managed and displayed uniformly on the host computer's operating interface.

[0019] In a second aspect, the present invention also provides a combustion control method for a heavy oil burner, based on the clean combustion system described in the first aspect, including an ignition control method and an ignition stop control method;

[0020] The ignition control method includes:

[0021] Connect the gas branch circuit and the ignition branch circuit to allow the gas to enter the ignition gun for ignition;

[0022] If the ignition gun ignites successfully, the gas branch and the intake pipe are connected.

[0023] After the gas enters the fuel gun's gas circuit and passes through a preset intake time, the ignition branch is disconnected.

[0024] In response to the ignition of the gas in the fuel nozzle, the fuel branch and the fuel inlet pipe are connected;

[0025] After the fuel enters the fuel gun and the fuel circuit has been in the preset fuel inlet time, the gas branch and the gas source branch are disconnected, while the compressed air branch and the intake pipe are connected.

[0026] In response to the ignition of the atomized fuel from the fuel nozzle, the burner enters a continuous operation state;

[0027] The ignition stop control method includes:

[0028] Connect the gas branch, the gas source branch, and the air inlet pipe to allow gas to enter the oil gun gas circuit;

[0029] Connect the oil and gas branch line and disconnect the fuel branch line to allow the gas to enter the oil inlet pipe and the oil gun line, and purge the oil inlet pipe and the oil gun.

[0030] After the preset gas purging time, disconnect the gas branch and the gas source branch, and connect the compressed air branch, so that the compressed air enters the oil gun through the air inlet pipe and the oil inlet pipe for purging.

[0031] After the preset compressed air purging time, disconnect the compressed air branch.

[0032] Furthermore, in the ignition control method,

[0033] If the ignition gun fails to ignite, the gas branch and the ignition branch will be disconnected, and a message will be displayed indicating that the ignition gun failed to ignite.

[0034] If the gas in the fuel nozzle is not ignited, disconnect the gas branch and the gas source branch, indicating that the fuel nozzle has failed to ignite.

[0035] If the atomized fuel from the fuel nozzle fails to ignite, the fuel branch is disconnected, indicating a fuel ignition failure.

[0036] Furthermore, the preset air intake time is preferably 5 to 15 seconds; the preset oil intake time is preferably 5 to 15 seconds; the preset gas purging time is preferably 30 to 60 seconds; and the preset compressed air purging time is preferably 10 to 30 seconds.

[0037] Furthermore, the method also includes purging the combustion chamber and furnace with an air supply system before ignition to remove residual combustibles in the furnace and ensure ignition safety; after ignition, purging the combustion chamber and furnace with an air supply system to cool the combustion chamber and furnace and prevent excessive temperature from damaging components such as the filter bag.

[0038] Thirdly, the present invention also provides a burner including the heavy oil burner clean combustion system described in the first aspect.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] The clean combustion system described in this invention achieves high ignition success rate and complete oil mist combustion without increasing the complexity of the system composition, avoiding problems such as fuel coking, clogging of nozzles, drying drums and dust collection bags, and damage to the dust collection bags due to excessive temperature.

[0041] The combustion control method described in this invention addresses the problem of difficulty in ignition during startup by using gas to atomize fuel. This significantly improves the first-time ignition success rate while slightly increasing the cost of gas usage, and avoids the phenomena of excessive smoke during ignition, incomplete combustion causing fuel coking, and nozzle blockage.

[0042] The combustion control method described in this invention uses gas for purging when the fire is shut down. The atomized fuel containing gas is sprayed out from the oil gun head and ignited and exhausted by the flame. This avoids the problem that a large amount of fuel in the oil pipe cannot be fully burned and enters the drying drum and secondary dust collector under the action of the induced draft system, contaminating the drum and clogging the filter bag, which would lead to a significant increase in dust removal pressure drop, reduced output of the entire mixing plant system, increased energy consumption, and reduced filter bag life. Attached Figure Description

[0043] Figure 1 A simplified diagram of the burner components in an existing technical solution;

[0044] Figure 2 This is a schematic diagram of a clean combustion system for a heavy oil burner provided in Embodiment 1 of the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of the compressed air branch circuit described in Example 1;

[0046] Figure 4 This is a schematic diagram of the structure of the gas branch circuit described in Example 1;

[0047] Figure 5 This is a schematic diagram of the structural composition of the ignition branch circuit described in Example 1;

[0048] Figure 6 This is a schematic diagram of the structure of the fuel branch circuit described in Example 1;

[0049] Figure 7 This is a flowchart of the ignition control method in the heavy oil burner combustion control method described in Example 2;

[0050] Figure 8 This is a flowchart of the shutdown control method in the heavy oil burner combustion control method described in Example 2.

[0051] In the diagram: 1. Fuel nozzle; 2. Inlet pipe; 3. Gas three-way valve; 301. Gas source; 302. Gas branch switch valve; 303. Gas branch pressure regulating valve; 304. Gas branch pressure sensor; 311. Air compressor; 312. Air tank; 313. Compressed air branch switch valve; 314. Compressed air branch pressure regulating valve; 315. Compressed air branch pressure sensor; 321. Ignition nozzle; 322. Ignition branch switch valve; 4. Gas source branch switch valve; 5. Fuel three-way valve; 501. Fuel tank; 502. Fuel pump; 503. Fuel branch switch valve; 504. Fuel branch pressure regulating valve; 505. Fuel branch pressure sensor; 6. Fuel inlet pipe; 7. Fuel-gas branch switch valve; 8. Fuel-gas branch pipe; 9. Photoelectric sensor; 10. Ignition electrode; 11. Industrial computer; 12. Host computer. Detailed Implementation

[0052] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings and specific examples.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] Example 1

[0056] like Figure 2 As shown, this embodiment provides a clean combustion system for a heavy oil burner, including: an oil gun 1, an ignition gun 321, a photoelectric sensor 9, and an industrial control computer 11; the air inlet pipe 2 of the oil gun 1 is connected to a gas three-way valve 3, and the oil inlet pipe 6 is connected to a fuel three-way valve 5; the inlet of the gas three-way valve 3 is connected to a gas source branch and a compressed air branch, respectively, and the outlet is connected to an oil and gas branch pipe, controlling the entry of gas or compressed air into the downstream pipeline through the gas three-way valve 3; the inlet of the fuel three-way valve 5 is connected to a fuel branch and an oil and gas branch pipe, respectively, and the outlet is connected to the oil inlet pipe 6; the inlet of the gas source branch is connected to the gas branch, and the outlet of the gas branch is also connected to the ignition branch leading to the ignition gun 321.

[0057] In a specific embodiment, the outlet of the air intake pipe 2 is connected to the air passage of the fuel gun 1, and gas enters the air passage of the fuel gun 1 through the air intake pipe 2; the outlet of the fuel inlet pipe 6 is connected to the fuel passage of the fuel gun 1, and fuel or gas can enter the fuel passage of the fuel gun 1 through the fuel inlet pipe 6.

[0058] like Figure 3As shown, the compressed air branch in this embodiment includes an air compressor 311, an air tank 312, a compressed air branch switch valve 313, a compressed air branch pressure regulating valve 314, and a compressed air branch pressure sensor 315 connected in sequence. The outlet of this branch is connected to a gas three-way valve 3. The compressed air generated by the air compressor 311 first enters the air tank 312 for storage. After the compressed air branch switch valve 313 is opened, the compressed air enters the downstream pipeline. The pressure of the gas entering the oil gun 1 is regulated by the compressed air branch pressure regulating valve 314, and the pressure is accurately monitored by the compressed air branch pressure sensor 315.

[0059] like Figure 4 As shown, the gas branch circuit in this embodiment includes a gas source 301, a gas branch circuit switching valve 302, a gas branch circuit pressure regulating valve 303, and a gas branch circuit pressure sensor 304 connected in sequence. The outlet of the gas branch circuit is connected to the ignition branch circuit and the gas source branch circuit respectively. The gas source branch circuit is equipped with a gas source branch circuit switching valve 4, the outlet of which is connected to a gas three-way valve 3.

[0060] like Figure 5 As shown, the ignition branch in this embodiment includes an ignition branch switch valve 322 and an ignition gun 321. The ignition gun 321 ignites the gas through an ignition electrode 10, which is a high-voltage ignition electrode that can generate an electric spark to ignite the gas.

[0061] like Figure 6 As shown, the fuel branch in this embodiment includes a fuel tank 501, a fuel pump 502, a fuel branch switching valve 503, a fuel branch pressure regulating valve 504, and a fuel branch pressure sensor 505 connected in sequence. The outlet of this branch is connected to a fuel three-way valve 5.

[0062] like Figure 2 As shown, the oil and gas branch line in this embodiment includes an oil and gas branch line 8 and an oil and gas branch line switch valve 7. The inlet of the air inlet pipe 2 is connected to the oil and gas branch line 8 through a T-type connector.

[0063] The photoelectric sensor 9 described in this embodiment operates continuously throughout the entire burner operation process to detect the presence of flame (i.e., whether the gas / atomized fuel of the ignition gun and oil gun is ignited) and converts the light signal into an electrical signal for transmission to the industrial control computer 11.

[0064] All the aforementioned actuators (including each switching valve and pressure regulating valve, as well as air compressor 311 and oil pump 502, etc.) and sensors are connected to the industrial control computer 11 via signal lines. The industrial control computer 11 is also connected to the host computer 12, and is managed and displayed uniformly on the host computer 12's operating interface.

[0065] Example 2

[0066] In a complete operation of an asphalt mixing plant, the general process follows the steps of ignition, continuous operation, and ignition cessation.

[0067] This embodiment provides a combustion control method for a heavy oil burner, based on the clean combustion system described in Embodiment 1, and mainly includes an ignition control method and a shutdown control method.

[0068] like Figure 7 As shown, the ignition control method described in this embodiment includes:

[0069] Upon initiation of the ignition command, the air supply system continuously purges the combustion chamber and furnace to remove any remaining combustibles and ensure ignition safety.

[0070] After confirming that the ignition conditions are met, open the gas branch switch valve 302, adjust the pressure to the required pressure using the gas branch pressure regulating valve 303, open the ignition branch switch valve 322, and the gas enters the ignition gun 321. The ignition electrode 10 releases an electric spark to ignite the gas.

[0071] The photoelectric sensor 9 detects whether an ignition flame is formed. If no flame signal is detected, the gas branch switch valve 302 and the ignition branch switch valve 322 are closed, and the host computer operation interface prompts that the ignition gun has failed to ignite. If a flame signal is detected, the gas source branch switch valve 4 is opened, the gas three-way valve 3 is switched to the gas branch, and the gas enters the gas circuit of the oil gun 1 through the gas three-way valve 3 and the air inlet pipe 2. After 5 to 15 seconds, the ignition branch switch valve 322 is closed, and the ignition flame is extinguished.

[0072] The photoelectric sensor 9 detects whether the gas in the fuel nozzle 1 is ignited by the ignition flame. If no flame signal is detected, the gas branch switch valve 302 and the gas source branch switch valve 4 are closed, and the host computer operation interface displays a message indicating that the fuel nozzle ignition has failed. If a flame signal is detected, the fuel branch switch valve 503 is opened, the fuel pump 502 is started, and the fuel three-way valve 5 is switched to the fuel branch. Fuel enters the fuel line of the fuel nozzle 1 through the fuel three-way valve 5 and the fuel inlet pipe 6. The gas and fuel meet and mix inside the fuel nozzle, and are sprayed out from the nozzle head as fine, evenly atomized oil mist particles containing a large amount of gas. At this time, the flame formed by the gas can easily ignite the oil mist, greatly improving the first ignition success rate and avoiding the phenomenon of large amounts of dense smoke during ignition, incomplete combustion causing fuel coking, and clogging of the nozzle.

[0073] After 5-15 seconds, close the gas branch switch valve 302 and the gas source branch switch valve 4, and simultaneously open the compressed air branch switch valve 313. The gas three-way valve 3 switches to the compressed air branch, and the compressed air enters the gas circuit of the fuel gun 1 through the gas three-way valve 3 and the air inlet pipe 2. The compressed air and fuel meet and mix inside the fuel gun 1, and are sprayed out from the fuel gun head to form uniformly atomized fine oil mist particles. Since the combustion zone has formed a normal combustion flame at this time, the oil mist is easily ignited and will not cause problems such as flameout or failure to ignite.

[0074] The photoelectric sensor 9 detects whether the atomized fuel in the fuel gun 1 is ignited. If no flame signal is detected, the fuel branch switch valve 503 is closed and the fuel pump 502 stops working. The host computer operation interface prompts that the fuel ignition has failed. If there is a signal, it indicates that the fuel ignition is successful and the burner enters the normal continuous operation state.

[0075] like Figure 8 As shown, the fire stop control method described in this embodiment includes:

[0076] The start / stop ignition command opens the gas branch switch valve 302 and the gas source branch switch valve 4, switching the gas three-way valve 3 to the gas branch. Gas enters the oil gun gas circuit through the gas three-way valve 3 and the air inlet pipe 2. The oil-gas branch switch valve 7 is opened, stopping the oil pump 502. The fuel branch switch valve 503 is closed, switching the fuel three-way valve 5 to the oil-gas branch. Gas enters the oil inlet pipe 6 and the oil gun 1 oil circuit through the fuel three-way valve 5, purging the oil inlet pipe 6 and oil gun 1, which can be several meters long. Because this process uses flammable gas for atomization and purging, a continuous flame is formed to ensure complete combustion of the atomized fuel. This avoids a large amount of fuel in the oil pipe not being fully burned, which would then enter the drying drum and secondary dust collector bags under the action of the induced draft system, contaminating the drum and clogging the bags. This would lead to a significant increase in dust removal pressure drop, reduced output of the entire mixing plant system, increased energy consumption, and reduced bag life, causing huge losses to the customer.

[0077] After purging for 30-60 seconds, close the gas branch switch valve 302 and the gas source branch switch valve 4, open the compressed air branch switch valve 313, switch the gas three-way valve 3 to the compressed air branch, and the compressed air enters the oil gun 1 through the air inlet pipe 2 and the oil inlet pipe 6. The flame will naturally extinguish after the residual gas in the pipeline is exhausted. The photoelectric sensor 9 detects the disappearance of the flame signal and indicates that the flame signal does not exist.

[0078] After the compressed air continues to purge for 10 to 30 seconds, the air compressor 311 stops operating, the compressed air branch switch valve 313 is closed, and the ignition stop command ends.

[0079] The air supply system continuously purges the combustion chamber and furnace for at least 10 minutes to cool them down and prevent overheating from damaging components such as the filter bag.

[0080] Example 3

[0081] This embodiment provides a burner, including the heavy oil burner clean combustion system described in Embodiment 1.

[0082] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and principles of the described embodiments, and these modifications and variations should also be considered within the scope of protection of the present invention.

Claims

1. A clean combustion system for a heavy oil burner, characterized in that, include: Oil gun, ignition gun, photoelectric sensor and controller; The air inlet pipe of the fuel gun is connected to a gas three-way valve, and the fuel inlet pipe is connected to a fuel three-way valve; the inlet of the gas three-way valve is connected to the gas source branch and the compressed air branch respectively, and the outlet is connected to the gas-fuel branch; the inlet of the fuel three-way valve is connected to the fuel branch and the gas-fuel branch respectively, and the outlet is connected to the fuel inlet pipe; the inlet of the gas source branch is connected to the gas branch, and the outlet of the gas branch is also connected to the ignition branch leading to the ignition gun; Each of the gas source branch, ignition branch, gas branch, fuel oil branch, oil and gas branch pipe branch and compressed air branch is equipped with a switch valve; The photoelectric sensor is used to detect the presence of a flame and transmit the signal to the controller; The signal input terminal of the controller is connected to the photoelectric sensor, and the signal output terminal is connected to each switching valve. Each of the fuel branch, gas branch, and compressed air branch is equipped with a pressure regulating valve and a pressure sensor, and the pressure regulating valve and pressure sensor are all connected to the controller. The fuel branch also includes a fuel source and a fuel pump, the fuel pump being connected to a controller; The gas branch also includes a gas source; The compressed air branch also includes an air compressor and an air tank, and the air compressor is connected to a controller; The oil and gas branch line also includes an oil and gas branch pipe, and the inlet of the air inlet pipe is connected to the oil and gas branch pipe through a T-joint.

2. The clean combustion system for heavy oil burners according to claim 1, characterized in that, The controller is also connected to a host computer.

3. A combustion control method for a heavy oil burner, based on the clean combustion system described in claim 1 or 2, characterized in that, This includes ignition control methods and ignition shutdown control methods; The ignition control method includes: Connect the gas branch circuit and the ignition branch circuit to allow the gas to enter the ignition gun for ignition; If the ignition gun ignites successfully, the gas branch and the intake pipe are connected. After the gas enters the fuel gun's gas circuit and passes through a preset intake time, the ignition branch is disconnected. In response to the ignition of the gas in the fuel nozzle, the fuel branch and the fuel inlet pipe are connected; After the fuel enters the fuel gun and the fuel circuit has been in the preset fuel inlet time, the gas branch and the gas source branch are disconnected, while the compressed air branch and the intake pipe are connected. In response to the ignition of the atomized fuel from the fuel nozzle, the burner enters a continuous operation state; The ignition stop control method includes: Connect the gas branch, the gas source branch, and the air inlet pipe to allow gas to enter the oil gun gas circuit; Connect the oil and gas branch line and disconnect the fuel branch line to allow the gas to enter the oil inlet pipe and the oil gun line, and purge the oil inlet pipe and the oil gun. After the preset gas purging time, disconnect the gas branch and the gas source branch, and connect the compressed air branch, so that the compressed air enters the oil gun through the air inlet pipe and the oil inlet pipe for purging. After the preset compressed air purging time, disconnect the compressed air branch.

4. The combustion control method for a heavy oil burner according to claim 3, characterized in that, In the aforementioned ignition control method If the ignition gun fails to ignite, the gas branch and the ignition branch will be disconnected, and a message will be displayed indicating that the ignition gun failed to ignite. If the gas in the fuel nozzle is not ignited, disconnect the gas branch and the gas source branch, indicating that the fuel nozzle has failed to ignite. If the atomized fuel from the fuel nozzle fails to ignite, the fuel branch is disconnected, indicating a fuel ignition failure.

5. The combustion control method for a heavy oil burner according to claim 3, characterized in that, The preset air intake time is 5~15s; And / or, the preset oil injection time is 5~15s; And / or, the preset gas purging time is 30~60s; And / or, the preset compressed air purging time is 10~30s.

6. The combustion control method for a heavy oil burner according to claim 3, characterized in that, Before ignition and after ignition is stopped, the combustion chamber and furnace are purged by the air supply system.

7. A burner, characterized in that, Includes the clean combustion system for heavy oil burners as described in claim 1 or 2.

Images