Fuel oil burner

Abstract

The utility model relates to the technical field of fuel oil combustors, in particular to a fuel oil combustor which comprises a shell, an air inlet pipe arranged at the right end of the shell, an air outlet pipe arranged at the left end of the shell, an igniter arranged on the outer wall of the shell, a flame detector arranged at the top of the outer wall of the shell, a combustion chamber arranged in the shell and a compressed air inlet arranged at the right end of the air inlet pipe. A fuel nozzle is arranged between the gas collecting chamber and the combustion chamber, and a primary fuel inlet, a secondary fuel inlet and a tertiary fuel inlet which are communicated with the fuel nozzle are sequentially formed in the outer wall of the gas inlet pipe from front to back; according to the fuel oil burner, the air inlet pipe, the air outlet pipe and the shell are combined and connected, part of compressed air and fuel oil needing to be sprayed are sprayed out in a mixed mode under the cooperation of the compressed air inlet and the cooperation of the multiple fuel oil nozzles, and the fuel oil is sprayed out in a mixed mode under the cooperation of the primary fuel oil inlet, the secondary fuel oil inlet and the tertiary fuel oil inlet. And the three fuel nozzles can continuously guide the fuel to be sprayed out, and the sprayed fuel is ignited and matched under the cooperation of the igniter.

Description

Technical Field

[0001] The utility model relates to the technical field of oil burners, in particular to an oil burner. Background Art

[0002] Oil burner is a combustion device mainly based on oil fuel, mainly composed of oil atomizer and air regulator. Oil burner is widely used in many industrial fields. It is characterized by compact structure, concentrated heat release, and easy integration into a complete set of thermal equipment or test equipment. However, due to its compact structure, the flame of oil burner is relatively concentrated and the flame temperature is high, which easily causes more pollutants in the flue gas. The purpose of heat release is achieved by mixing the atomized fuel and combustion air and organizing combustion.

[0003] The utility model with the announcement number CN220229137U discloses a multi-nozzle oil burner, including a flame tube and a fixed bracket, a flame stabilizing disk for distributing air is arranged on one side of the inner wall of the flame tube, a primary air channel is arranged in the center of the flame stabilizing disk, an ignition oil nozzle and an ignition electrode are arranged at the center of the flame tube, a plurality of secondary air channels with long strip swirl groove structures are also opened on the flame stabilizing disk, a channel between the outer side of the flame stabilizing disk and the flame tube is a tertiary air channel, the fixed bracket is used to install a second-stage fire nozzle and a third-stage fire nozzle, and the second-stage fire nozzle and the third-stage fire nozzle are arranged along the annular portion in the tertiary air channel around the outer periphery of the flame stabilizing disk;

[0004] The above technical solution adopts a multi-nozzle design, and the sprayed flame is short and thick, which is suitable for short furnace boilers or heating equipment. In addition to the ignition oil nozzle, the fuel is also sprayed through multiple second-stage fire nozzles and third-stage fire nozzles, and is used in conjunction with the flame stabilizing disk to quickly mix the fuel and combustion-supporting air, thereby improving combustion efficiency and being suitable for low oxygen operation; however, the atomization space of the fuel is cramped under the compact structure, and the mixing range of the fuel and air is tight, resulting in the presence of local high equivalence ratio areas in the combustion chamber downstream of the burner where uniform mixing is not achieved, which in turn leads to instability and local high temperature generation during the use of the burner, while increasing the generation of NOx and CO. Utility Model Content

[0005] The purpose of the utility model is to provide a fuel burner to solve the problem that the multi-nozzle fuel burner with the authorization announcement number CN220229137U proposed in the above-mentioned background technology has a cramped atomization space for the fuel under the compact structure, and a tight mixing range of the fuel and the air, resulting in the presence of a local high equivalence ratio area in the combustion chamber downstream of the burner where uniform mixing is not achieved, which leads to instability and local high temperature generation during the use of the burner, and increases the generation of NOx and CO.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The oil burner comprises an outer shell, wherein an air inlet pipe is arranged at the right end of the outer shell, an air outlet pipe is arranged at the left end of the outer shell, an igniter is arranged on the outer wall of the outer shell near the right side of the front end, a flame detector is arranged at the top of the outer wall of the outer shell, a combustion chamber is arranged inside the outer shell, a hollow area between the inner wall of the outer shell and the outer wall of the combustion chamber is an annular sleeve air channel, a compressed air inlet is opened at the right end of the air inlet pipe, an air collecting chamber is arranged inside the air inlet pipe, a plurality of fuel nozzles are arranged between the air collecting chamber and the combustion chamber, a primary fuel inlet, a secondary fuel inlet and a tertiary fuel inlet connected to the fuel nozzle are arranged on the outer wall of the air inlet pipe in sequence from front to back, and a thermocouple is arranged on the outer wall of the air outlet pipe.

[0008] Preferably, the air inlet pipe is fixed to the outer shell by welding, and the air outlet pipe is fixed to the outer shell by welding.

[0009] In the utility model, the welding combination increases the stability of the installation.

[0010] Preferably, the igniter is fixedly connected to the housing by screws, and the igniter passes through the annular sleeve air passage, and the end thereof extends to the interior of the combustion chamber.

[0011] In the utility model, the igniter is provided with a high-voltage electric arc, and the ignition port of the igniter extends into the interior of the combustion chamber, which is helpful for the ignition operation.

[0012] Preferably, the flame detector is fixedly connected to the housing by screws, and a monitoring pipe of the flame detector extends into the combustion chamber.

[0013] In the utility model, the arrangement of the flame detector is helpful to monitor and coordinate the flame ignited in the combustion chamber.

[0014] Preferably, the thermocouple is fixedly connected to the air outlet pipe by screws, the thermocouple monitoring probe extends to the inside of the air outlet pipe, and the inside of the air outlet pipe is interconnected with the inside of the combustion chamber.

[0015] In the utility model, the thermocouple is provided to help monitor the outlet hot flue gas temperature of the combustion chamber outlet, and the monitored temperature is displayed on the corresponding display element.

[0016] Preferably, the fuel nozzles are distributed in a circular shape with equal intervals, the fuel nozzles are fixedly connected to the end of the combustion chamber by screws, and the primary fuel inlet, the secondary fuel inlet, and the tertiary fuel inlet are all connected to the fuel nozzles through pipelines.

[0017] In the utility model, multiple fuel nozzles are provided to facilitate stable fuel injection and uniform ignition. The primary fuel inlet, the secondary fuel inlet and the tertiary fuel inlet cooperate with each other to introduce fuel into the fuel nozzles. The three fuel nozzles are arranged in a herringbone shape, and the center lines of the nozzles intersect on the center line of the combustion chamber to ensure the centrality of the flame.

[0018] Preferably, the interior of the annular sleeve air passage is connected to the interior of the air collecting chamber through multiple vents, and a plurality of inclined holes are opened on the inner wall of the combustion chamber. The inclined holes are distributed in a circular shape with equal intervals, and the inclined holes connect the internal space of the annular sleeve air passage with the internal space of the combustion chamber.

[0019] In the utility model, compressed air enters the compressed air collecting chamber through the compressed air inlet, and then the compressed air is divided into two paths. One path enters the combined fuel nozzle, mixes with the fuel, and atomizes the fuel at the fuel nozzle outlet through pressure. The other path of compressed air enters the annular sleeve air channel through the vent hole, and is ejected from the inclined hole on the inner wall of the combustion chamber to cool the inner wall of the combustion chamber and further realize the combustion of unburned fuel. At the same time, the compressed air ejected from the inclined hole can adjust the hot flue gas temperature at the combustion chamber outlet.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model is connected with the shell by arranging an air inlet pipe, an air outlet pipe and a housing, and with the cooperation of the compressed air inlet, it helps the external compressed air to enter the air collecting chamber, and with the cooperation of multiple fuel nozzles, part of the compressed air is mixed with the fuel to be sprayed out, and with the cooperation of the primary fuel inlet, the secondary fuel inlet and the tertiary fuel inlet, it helps the three fuel nozzles to continuously guide the fuel to be sprayed, which helps to evenly mix and facilitate combustion, and with the cooperation of the igniter, the sprayed fuel is ignited.

[0022] 2. The utility model realizes flame stability monitoring inside the combustion chamber by setting a flame detector, and the installation of a thermocouple monitors the hot flue gas temperature at the combustion chamber outlet. The cooperation of the annular sleeve air channel helps part of the compressed air to enter the interior and pass through the combustion chamber through the inclined hole, thereby further realizing the combustion of unburned fuel and cooling the inner wall of the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the overall cross-section structure of the utility model from the right side;

[0025] Figure 3 It is a schematic diagram of the overall cross-section of the utility model from the left.

[0026] The meaning of each number in the figure is:

[0027] 1. Shell; 10. Combustion chamber; 100. Oblique hole; 11. Annular sleeve air passage;

[0028] 2. Intake pipe; 20. Compressed air inlet; 21. Air collecting chamber; 22. Fuel nozzle;

[0029] 3. Exhaust pipe;

[0030] 4. Ignition device;

[0031] 5. Flame detector;

[0032] 6. Thermocouple;

[0033] 7. Primary fuel inlet;

[0034] 8. Secondary fuel inlet;

[0035] 9. Three fuel inlets. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] See also Figure 1-Figure 3 , this embodiment provides a technical solution:

[0038] The oil burner comprises a shell 1, an air inlet pipe 2 is arranged at the right end of the shell 1, an air outlet pipe 3 is arranged at the left end of the shell 1, the air inlet pipe 2 is fixed to the shell 1 by welding, and the air outlet pipe 3 is fixed to the shell 1 by welding.

[0039] In the utility model, the welding combination increases the stability of the installation.

[0040] Furthermore, an igniter 4 is provided on the outer wall of the shell 1 near the right side of the front end. The igniter 4 is fixedly connected to the shell 1 by screws. The igniter 4 passes through the annular sleeve air channel 11, and the end thereof extends to the interior of the combustion chamber 10.

[0041] In the present invention, the igniter 4 is provided to generate a high voltage arc, and the ignition port of the igniter 4 extends into the interior of the combustion chamber 10, which is helpful for the ignition operation.

[0042] Specifically, a flame detector 5 is provided at the top of the outer wall of the housing 1 . The flame detector 5 is fixedly connected to the housing 1 by screws, and a monitoring pipe of the flame detector 5 extends into the combustion chamber 10 .

[0043] In the present invention, the flame detector 5 is provided to help monitor the flame ignited in the combustion chamber 10 .

[0044] It should be noted that a combustion chamber 10 is provided inside the outer shell 1, and the hollow area between the inner wall of the outer shell 1 and the outer wall of the combustion chamber 10 is an annular sleeve air channel 11. A compressed air inlet 20 is provided at the right end of the intake pipe 2, and an air collecting chamber 21 is provided inside the intake pipe 2. A plurality of fuel nozzles 22 are provided between the air collecting chamber 21 and the combustion chamber 10. The interior of the annular sleeve air channel 11 is connected with the interior of the air collecting chamber 21 through a plurality of air vents. A plurality of inclined holes 100 are provided on the inner wall of the combustion chamber 10, and the inclined holes 100 are distributed in a circular shape with equal intervals, and the inclined holes 100 connect the internal space of the annular sleeve air channel 11 with the internal space of the combustion chamber 10.

[0045] In the utility model, compressed air enters the compressed air collecting chamber 21 through the compressed air inlet 20, and then the compressed air is divided into two paths. One path enters the combined fuel nozzle 22, mixes with the fuel, and atomizes the fuel at the outlet of the fuel nozzle 22 through pressure. The other path of compressed air enters the annular sleeve air channel 11 through the air vent, and is ejected from the inclined hole 100 on the inner wall of the combustion chamber 10, so as to cool the inner wall of the combustion chamber 10 and further realize the combustion of the unburned fuel. At the same time, the compressed air ejected from the inclined hole 100 can adjust the hot flue gas temperature at the outlet of the combustion chamber 10.

[0046] Furthermore, a primary fuel inlet 7, a secondary fuel inlet 8, and a tertiary fuel inlet 9 connected to the fuel nozzle 22 are provided on the outer wall of the intake pipe 2 in sequence from front to back. The fuel nozzles 22 are distributed in a ring shape with equal intervals. The fuel nozzle 22 is fixedly connected to the end of the combustion chamber 10 by screws. The primary fuel inlet 7, the secondary fuel inlet 8, and the tertiary fuel inlet 9 are all connected to the fuel nozzle 22 through a pipeline.

[0047] In the utility model, multiple fuel nozzles 22 are provided to facilitate stable fuel injection and uniform ignition. The primary fuel inlet 7, the secondary fuel inlet 8, and the tertiary fuel inlet 9 cooperate with each other to introduce fuel into the fuel nozzle 22. The three fuel nozzles 22 are arranged in a herringbone shape, and the center lines of the nozzles intersect on the center line of the combustion chamber 10 to ensure the centrality of the flame.

[0048] It is worth adding that a thermocouple 6 is provided on the outer wall of the gas outlet pipe 3. The thermocouple 6 is fixedly connected to the gas outlet pipe 3 by screws, and the monitoring probe of the thermocouple 6 extends into the inside of the gas outlet pipe 3, and the inside of the gas outlet pipe 3 and the inside of the combustion chamber 10 are interconnected.

[0049] In the present invention, the thermocouple 6 is provided to help monitor the outlet hot flue gas temperature of the combustion chamber 10 outlet, and display the monitored temperature on the corresponding display element.

[0050] When the fuel burner of this embodiment is used, the user first fixes the air inlet pipe 2 with the compressed air inlet 20 and the air collecting chamber 21 to the housing 1, fixes the air outlet pipe 3 to the housing 1, and fixes the three fuel nozzles 22 to the junction of the air inlet pipe 2 and the housing 1. Then, the primary fuel inlet 7, the secondary fuel inlet 8, and the tertiary fuel inlet 9 are fixed to the corresponding fuel nozzles 22 in sequence. The igniter 4 is installed on the housing 1, and the ignition end extends into the combustion chamber 10. The flame detector 5 is pressed on the housing 1, and the monitoring end extends into the combustion chamber 10. The thermocouple 6 is fixed on the air outlet pipe 3;

[0051] The user connects the air intake pipe 2 to the pipe for supplying compressed air from the outside, and the compressed air enters the air collecting chamber 21 from the compressed air inlet 20. One path of compressed air enters the fuel nozzle 22, mixes with the fuel, and atomizes the fuel at the outlet of the fuel nozzle 22 through pressure. The other path of compressed air enters the annular sleeve air channel 11 through the air vent, and is ejected from the inclined hole 100 on the inner wall of the combustion chamber 10, so as to cool the inner wall of the combustion chamber 10 and further realize the combustion of the unburned fuel. At the same time, the compressed air ejected from the inclined hole 100 can adjust the hot flue gas temperature at the outlet of the combustion chamber 10, cooperate with the igniter 4 to quickly ignite the internal fuel, and the flame detector 5 monitors the internal flame condition in real time. With the cooperation of the thermocouple 6, the hot flue gas temperature at the outlet of the combustion chamber 10 is continuously adjusted.

Claims

1. A fuel burner, comprising a housing (1), wherein the right end of the housing (1) is provided with an air inlet pipe (2), and the left end of the housing (1) is provided with an air outlet pipe (3), characterized in that: An igniter (4) is provided on the outer wall of the shell (1) near the right side of the front end, a flame detector (5) is provided at the top of the outer wall of the shell (1), a combustion chamber (10) is provided inside the shell (1), a hollow area between the inner wall of the shell (1) and the outer wall of the combustion chamber (10) is an annular sleeve air channel (11), a compressed air inlet (20) is provided at the right end of the intake pipe (2), an air collecting chamber (21) is provided inside the intake pipe (2), a plurality of fuel nozzles (22) are provided between the air collecting chamber (21) and the combustion chamber (10), a primary fuel inlet (7), a secondary fuel inlet (8), and a tertiary fuel inlet (9) connected to the fuel nozzle (22) are provided on the outer wall of the intake pipe (2) in sequence from front to back, and a thermocouple (6) is provided on the outer wall of the outlet pipe (3).

2. The oil burner according to claim 1, characterized in that: The air inlet pipe (2) is fixed to the outer shell (1) by welding, and the air outlet pipe (3) is fixed to the outer shell (1) by welding.

3. The oil burner according to claim 1, characterized in that: The igniter (4) is fixedly connected to the housing (1) by means of screws; the igniter (4) passes through the annular sleeve air passage (11), and the end thereof extends to the interior of the combustion chamber (10).

4. The oil burner according to claim 1, characterized in that: The flame detector (5) is fixedly connected to the housing (1) via screws, and a monitoring pipe of the flame detector (5) extends into the combustion chamber (10).

5. The oil burner according to claim 1, characterized in that: The thermocouple (6) is fixedly connected to the air outlet pipe (3) by means of screws, a monitoring probe of the thermocouple (6) extends into the interior of the air outlet pipe (3), and the interior of the air outlet pipe (3) and the interior of the combustion chamber (10) are in communication with each other.

6. The oil burner according to claim 1, characterized in that: The fuel nozzles (22) are distributed in a circular shape with equal spacing, and the fuel nozzles (22) are fixedly connected to the end of the combustion chamber (10) by means of screws, and the primary fuel inlet (7), the secondary fuel inlet (8), and the tertiary fuel inlet (9) are all connected to the fuel nozzles (22) by means of pipelines.

7. The oil burner according to claim 1, characterized in that: The interior of the annular sleeve air passage (11) is connected to the interior of the air collecting chamber (21) via a plurality of vent holes. A plurality of inclined holes (100) are provided on the inner wall of the combustion chamber (10). The inclined holes (100) are distributed in an annular shape at equal intervals. The inclined holes (100) connect the interior space of the annular sleeve air passage (11) with the interior space of the combustion chamber (10).

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