Combustor and heating furnace

Abstract

The invention belongs to the technical field of combustors, and discloses a combustor and a heating furnace, the combustor is used for providing heat for the heating furnace, the heating furnace comprises a hearth and a furnace tube arranged in the hearth, the combustor comprises a burner block, a combustion-supporting gas assembly and a gas assembly, the gas assembly comprises a gas nozzle, and the burner block and the gas nozzle are both arranged in the hearth. The burner block is provided with a first combustion-supporting gas flow channel and a second combustion-supporting gas flow channel, the first combustion-supporting gas flow channel comprises a first gas inlet end and a first gas outlet end, the second combustion-supporting gas flow channel comprises a second gas inlet end and a second gas outlet end which face the same direction, and the first gas outlet end is located on the side, away from the furnace tube, of the second gas outlet end. The first gas inlet end and the second gas inlet end are both communicated with the combustion-supporting gas assembly, combustion-supporting gas ejected from the first gas outlet end is first combustion-supporting gas, combustion gas ejected from the combustion gas nozzle can be mixed with the first combustion-supporting gas for combustion, and the combustor can reduce the probability that the first flame impacts the furnace tube and is beneficial to prolonging the operation cycle of the furnace tube and the heating furnace.

Description

Technical Field

[0001] The invention relates to the technical field of burners, and in particular to a burner and a heating furnace. Background Art

[0002] The burner is one of the main components of the cracking furnace. The heat required by the cracking furnace is obtained by burning gas in the burner.

[0003] In order to lengthen the flame length of the burner and reduce the nitrogen oxide emission of the burner, the prior art discloses a technical solution of spraying fuel gas to different heights of the flame to form a long flame gas burner. The long flame gas burner has the problem of flame rolling into the furnace, and the furnace of the cracking furnace is usually provided with a furnace tube. The flame rolling into the furnace is prone to the problem of flame impacting the furnace tube, thereby shortening the operation cycle of the furnace tube and the cracking furnace.

[0004] Therefore, it is urgent to propose a burner and a heating furnace to solve the above technical problems. Summary of the invention

[0005] The first object of the present invention is to provide a burner which can form an air barrier between a first flame and a furnace tube of a heating furnace, thereby reducing the probability of the first flame impacting the furnace tube, and is beneficial to extending the operation cycle of the furnace tube and the heating furnace.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The burner is used to provide heat for the heating furnace. The heating furnace includes a furnace and a furnace tube arranged in the furnace. The burner includes:

[0008] A burner brick, the burner brick can be arranged in the furnace, the burner brick is provided with a first combustion-supporting gas flow channel and a second combustion-supporting gas flow channel, the first combustion-supporting gas flow channel includes a first gas inlet end and a first gas outlet end, the second combustion-supporting gas flow channel includes a second gas inlet end and a second gas outlet end, the first gas outlet end is configured to be located at a side of the second gas outlet end away from the furnace tube, and the first gas outlet end and the second gas outlet end have the same orientation;

[0009] A combustion-supporting gas component, wherein the first gas inlet end and the second gas inlet end are both connected to the combustion-supporting gas component, the combustion-supporting gas component is used to transport the combustion-supporting gas to the first combustion-supporting gas flow channel and the second combustion-supporting gas flow channel, and the combustion-supporting gas sprayed from the first gas outlet end is the first combustion-supporting gas;

[0010] The gas component includes a gas nozzle, which can be arranged in the furnace. The gas sprayed by the gas nozzle can be mixed with the first supporting gas to burn.

[0011] Optionally, the combustion-supporting gas sprayed from the second gas outlet end is the second combustion-supporting gas, and the direction in which the second combustion-supporting gas is sprayed from the second gas outlet end is the first direction. Along the first direction, the second gas outlet end is in a closed shape.

[0012] Optionally, along the first direction, at least one of the two inner walls of the second air outlet end in the second direction is inclined toward the other, the two inner walls of the second air outlet end in the third direction are parallel to the first direction, the third direction is the direction in which the second air outlet end points to the first air outlet end, the second direction and the third direction are on the same plane, and the second direction is perpendicular to the third direction.

[0013] Optionally, the number of the second air outlet ports is at least two.

[0014] Optionally, all the second air outlet ends are distributed along the second direction, the direction in which the second air outlet ends point to the first air outlet ends is the third direction, the second direction and the third direction are on the same plane, and the second direction is perpendicular to the third direction.

[0015] Optionally, two sides of the first air outlet end in the second direction respectively correspond to a second air outlet end.

[0016] Optionally, the burner brick is further provided with a protection groove, the gas nozzle is arranged in the protection groove, and a first spray hole is provided on the side of the gas nozzle facing the notch of the protection groove, and the gas sprayed from the first spray hole can be mixed with the first combustion-supporting gas for combustion.

[0017] Optionally, the number of gas nozzles and protective grooves are both multiple and one-to-one corresponding, at least one of the multiple gas nozzles is an ejector nozzle, the ejector nozzle is provided with a second spray hole, the protective groove accommodating the ejector nozzle is an ejector groove, the side wall of the ejector groove is provided with an ejector channel, the ejector channel includes a first end and a second end, the first end is connected to the first combustion-supporting gas flow channel, the second end is used to connect with the furnace, and the second spray hole points to the second end.

[0018] Optionally, the burner also includes a pilot lamp, which includes a pilot lamp nozzle, which is arranged in the first combustion-supporting gas flow channel. The pilot lamp can form a second flame at the pilot lamp nozzle, and the first end points to the second flame.

[0019] A second object of the present invention is to provide a heating furnace in which the probability of the first flame impinging on the furnace tube is low.

[0020] To achieve this object, the present invention adopts the following technical solutions:

[0021] The heating furnace comprises a furnace tube, a furnace chamber and the above-mentioned burner. The furnace tube, burner bricks and gas nozzle are all arranged in the furnace chamber, and the first gas outlet end is located on the side of the second gas outlet end away from the furnace tube.

[0022] Beneficial effects of the present invention:

[0023] The burner brick is provided with a first combustion-supporting gas flow channel and a second combustion-supporting gas flow channel, the first combustion-supporting gas flow channel includes a first gas inlet end and a first gas outlet end, the second combustion-supporting gas flow channel includes a second gas inlet end and a second gas outlet end, the first gas inlet end and the second gas inlet end are both connected to the combustion-supporting gas component, the combustion-supporting gas component is used to transport combustion-supporting gas to the first combustion-supporting gas flow channel and the second combustion-supporting gas flow channel, so that the first gas outlet end and the second gas outlet end can both spray combustion-supporting gas, the combustion-supporting gas sprayed from the first gas outlet end is referred to as the first combustion-supporting gas, the combustion-supporting gas sprayed from the second gas outlet end is referred to as the second combustion-supporting gas, and the combustion-supporting gas The gas nozzle is arranged in the furnace, and the gas sprayed by the gas nozzle can be mixed with the first combustion-supporting gas sprayed from the first gas outlet end to burn to form a first flame. Since the first gas outlet end is located on the side of the second gas outlet end away from the furnace tube, and the first gas outlet end and the second gas outlet end have the same direction, the second combustion-supporting gas sprayed from the second gas outlet end forms an air barrier between the first flame and the furnace tube. The air barrier can intercept the first flame that rolls toward the furnace tube, that is, the probability of the first flame impacting the furnace tube is reduced, which is beneficial to extending the operation cycle of the furnace tube and the heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a burner provided in Embodiment 1 of the present invention;

[0025] Figure 2 yes Figure 1 A-direction perspective structure diagram;

[0026] Figure 3 yes Figure 1 Cross-sectional view in the middle BB direction;

[0027] Figure 4 yes Figure 1 Schematic diagram of the structure from the C-direction perspective;

[0028] Figure 5 yes Figure 1 The enlarged structural diagram at D in the middle;

[0029] Figure 6 is a schematic structural diagram of a burner provided in Embodiment 2 of the present invention;

[0030] Figure 7 yes Figure 6 Cross-sectional view along EE direction.

[0031] In the figure:

[0032] D1, first direction; D2, second direction; D3, third direction;

[0033] 1. Furnace; 2. Furnace tube; 3. Furnace side wall;

[0034] 10. Burner brick; 11. First secondary air flow channel; 111. First intake end; 112. First outlet end; 12. Second secondary air flow channel; 121. Second intake end; 122. Second outlet end; 122a. Middle second outlet end; 122b. Side second outlet end; 13. Protection groove; 131. Ejector groove; 14. Ejector channel; 141. First end; 142. Second end; 15. Installation groove; 21. Gas nozzle; 211. Ejector nozzle; 22. Gas pipe; 31. Pilot burner nozzle; 32. Pipe body; 41. Air box. Detailed implementation mode

[0035] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0036] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] Embodiment 1

[0040] Long flame gas burners are prone to flames rolling over to areas with more air due to uneven mixing of gas and combustion-supporting gas (combustion-supporting gas is usually air). The burner bricks of the burner are usually located in the furnace of the heating furnace and close to the side wall of the furnace. The furnace tube of the heating furnace is located in the middle area of the furnace. When the burner is running and burning, the air in the middle area of the furnace is more sufficient. Therefore, the flames rolling over to the middle area of the furnace are easy to impact the furnace tube, causing the local temperature of the furnace tube to be too high, thereby shortening the operation cycle of the furnace tube and the heating furnace.

[0041] This embodiment provides a burner for providing heat to a heating furnace. The burner can form an air barrier between a first flame and a furnace tube of the heating furnace, thereby reducing the probability of the first flame impacting the furnace tube, which is beneficial to extending the operation cycle of the furnace tube and the heating furnace.

[0042] Specifically, Figures 1 to 3 As shown, the heating furnace includes a furnace 1 and a furnace tube 2 arranged in the furnace 1, and the burner includes a burner brick 10, a combustion-supporting gas component and a gas component, wherein the burner brick 10 can be arranged in the furnace 1, and the burner brick 10 is provided with a first combustion-supporting gas flow channel 11 and a second combustion-supporting gas flow channel 12, the first combustion-supporting gas flow channel 11 includes a first gas inlet end 111 and a first gas outlet end 112, the second combustion-supporting gas flow channel 12 includes a second gas inlet end 121 and a second gas outlet end 122, and the first gas outlet end 112 is configured to be located away from the furnace tube and the second gas outlet end 122 2, the first gas outlet end 112 and the second gas outlet end 122 have the same direction, the first gas inlet end 111 and the second gas inlet end 121 are both connected to the combustion-supporting gas component, the combustion-supporting gas component is used to transport the combustion-supporting gas to the first combustion-supporting gas flow channel 11 and the second combustion-supporting gas flow channel 12, the combustion-supporting gas sprayed from the first gas outlet end 112 is the first combustion-supporting gas, the gas component includes a gas nozzle 21, the gas nozzle 21 can be set in the furnace 1, the gas sprayed from the gas nozzle 21 can be mixed with the first combustion-supporting gas and burn to form a first flame (not shown in the figure).

[0043] Based on the above design, the burner brick 10 is provided with a first combustion-supporting gas flow channel 11 and a second combustion-supporting gas flow channel 12, the first combustion-supporting gas flow channel 11 includes a first gas inlet end 111 and a first gas outlet end 112, the second combustion-supporting gas flow channel 12 includes a second gas inlet end 121 and a second gas outlet end 122, the first gas inlet end 111 and the second gas inlet end 121 are both connected to the combustion-supporting gas component, and the combustion-supporting gas component is used to transport combustion-supporting gas to the first combustion-supporting gas flow channel 11 and the second combustion-supporting gas flow channel 12, so that the first gas outlet end 112 and the second gas outlet end 122 can both spray combustion-supporting gas, and the combustion-supporting gas sprayed from the first gas outlet end 112 is referred to as the first combustion-supporting gas, and the combustion-supporting gas sprayed from the second gas outlet end 122 is referred to as the second combustion-supporting gas. It is called the second combustion-supporting gas. The gas nozzle 21 is arranged in the furnace 1, and the gas sprayed by the gas nozzle 21 can be mixed with the first combustion-supporting gas sprayed by the first gas outlet end 112 to burn to form a first flame. Since the first gas outlet end 112 is located on the side of the second gas outlet end 122 away from the furnace tube 2, and the first gas outlet end 112 and the second gas outlet end 122 have the same direction, the second combustion-supporting gas sprayed by the second gas outlet end 122 forms an air barrier (not shown in the figure) between the first flame and the furnace tube 2. The air barrier can intercept the first flame that rolls toward the furnace tube 2, reduces the probability of the first flame impacting the furnace tube 2, and is beneficial to extending the operation cycle of the furnace tube 2 and the heating furnace.

[0044] On the other hand, the second combustion-supporting gas ejected from the second gas outlet 122 can be mixed with the unburned or incompletely burned gas and burn, which plays a role in supplementing the combustion-supporting gas to the first flame, reducing the probability of the first flame turning over due to insufficient combustion-supporting gas, thereby reducing the probability of the first flame impacting the furnace tube 2. In this embodiment, the lower part of the burner brick 10 is a rectangular parallelepiped structure, the upper part of the burner brick 10 is a quadrangular platform, one side wall of the burner brick 10 is arranged close to the furnace side wall 3 of the heating furnace, and the second combustion-supporting gas flow channel 12 is located on the side of the first combustion-supporting gas flow channel 11 away from the furnace side wall 3, so that the first flame is close to the furnace side wall 3 due to the wall effect to form a wall-attached flame. The first air inlet end 111 and the second air inlet end 121 are both located at the bottom of the burner brick 10, and the combustion-supporting gas assembly includes a bellows 41, one end of the bellows 41 is connected to a combustion-supporting gas supply source (not shown in the figure), and the other end of the bellows 41 is connected to the first air inlet end 111 and the second air inlet end 121, and the combustion-supporting gas (the combustion-supporting gas in this embodiment is air) supplied by the combustion-supporting gas supply source enters the first combustion-supporting gas flow channel 11 and the second combustion-supporting gas flow channel 12 through the first air inlet end 111 and the second air inlet end 121, respectively. The cross-sectional area of the first air inlet end 111 is greater than the cross-sectional area of the second air inlet end 121, so that most of the combustion-supporting gas in the wind box 41 enters the first combustion-supporting gas flow channel 11 through the first air inlet end 111, and a small part of the combustion-supporting gas enters the second combustion-supporting gas flow channel 12 through the second air inlet end 121. In this embodiment, the ratio of the cross-sectional area of the first air inlet end 111 to the cross-sectional area of the second air inlet end 121 is 9:1 to 7:3, so that the burner maintains a good combustion effect while ensuring that the second combustion-supporting gas ejected from the second air outlet end 122 can form an effective air barrier to intercept the first flame rolling toward the furnace tube 2.

[0045] Optionally, the second air inlet end 121 has a square structure. The auxiliary gas ejected from the second air outlet end 122 is the second auxiliary gas. The direction in which the second auxiliary gas is ejected from the second air outlet end 122 is the first direction D1. Along the first direction D1, the second air outlet end 122 is in a converging shape. Since the first air outlet end 112 and the second air outlet end 122 face the same direction, the direction in which the first auxiliary gas is ejected from the first air outlet end 112 is also the first direction D1. The first auxiliary gas is ejected from the first air outlet end 112 along the first direction D1 and mixes with the fuel gas to form a first flame. Therefore, the direction in which the root of the first flame points to the end is the same as the first direction D1, and the flow rate of the first auxiliary gas at the end of the first flame is less than that at the root of the first flame, which makes the probability of the end of the first flame curling more likely. In this embodiment, the second air outlet end 122 has a converging structure along the first direction D1. This structure can increase the flow velocity of the second auxiliary gas ejected from the second air outlet end 122, and further extend the ejection distance of the second auxiliary gas along the first direction D1, that is, it can extend the extension dimension of the above-mentioned air barrier in the first direction D1, which is beneficial to the air barrier intercepting the end of the first flame from curling towards the furnace tube 2, and further reduces the probability of the end of the first flame impacting the furnace tube 2. Further, along the first direction D1, at least one of the two inner walls of the second air outlet end 122 in the second direction D2 is inclined towards the other. The two inner walls of the second air outlet end 122 in the third direction D3 are both parallel to the first direction D1. The third direction D3 is the direction in which the second air outlet end 122 points to the first air outlet end 112. The second direction D2 and the third direction D3 are in the same plane, and the second direction D2 is perpendicular to the third direction D3. This structure can form a converging structure along the first direction D1 at the second air outlet end 122 without increasing the thickness of the burner brick 10 in the third direction D3, which is beneficial to reducing costs. Moreover, if the thickness of the burner brick 10 is increased in the third direction D3, the distance between the first auxiliary gas flow channel 11 and the furnace tube 2 will be reduced, that is, the distance between the first flame and the furnace tube 2 will be reduced, which will increase the probability of the first flame impacting the furnace tube 2. Therefore, in this embodiment, the size of the burner brick 10 in the third direction D3 is not increased, which is beneficial to reducing the probability of the first flame impacting the furnace tube 2.

[0046] Optionally, the number of the second air outlet ends 122 can be one, two, three, four, etc. As a preferred solution, the number of the second air outlet ends 122 is at least two. By increasing the number of the second air outlet ends 122, the reliability of the above-mentioned air barrier intercepting the first flame curling towards the furnace tube 2 is improved. At least two second air outlet ends 122 can be distributed along the second direction D2, at least two second air outlet ends 122 can also be distributed along the third direction D3, and at least two second air outlet ends 122 can also be partially distributed along the second direction D2 and the rest along the third direction D3.

[0047] Further, all the second gas outlet ends 122 are distributed on the burner block 10 along the second direction D2. The direction in which the second gas outlet ends 122 point to the first gas outlet end 112 is the third direction D3. The second direction D2 and the third direction D3 are in the same plane and perpendicular to each other. This structure can form multiple second gas outlet ends 122 on the burner block 10 without increasing the thickness of the burner block 10 in the third direction D3. On the one hand, it can reduce the cost, and on the other hand, it is beneficial to reduce the probability of the first flame impacting the furnace tube 2.

[0048] Furthermore, on both sides of the first gas outlet end 112 in the second direction D2, there is a second gas outlet end 122 corresponding to each side respectively. When the flow rate of the auxiliary gas in the first auxiliary gas flow channel 11 is small, the auxiliary gas preferentially flows in the central area of the first auxiliary gas flow channel 11. That is to say, the flow rate of the auxiliary gas in the central area of the first auxiliary gas flow channel 11 is greater than that in the edge area of the first auxiliary gas flow channel 11. Therefore, in the second direction D2, the first auxiliary gas ejected from both sides of the first gas outlet end 112 is less than the first auxiliary gas ejected from the middle of the first gas outlet end 112. This makes the probability of the first flame curling towards the furnace tube 2 in the two side areas in the second direction D2 higher. For the convenience of understanding, hereinafter, the two side areas of the first flame in the second direction D2 are referred to as the high-probability curling areas. In this embodiment, along the second direction D2, a second gas outlet end 122 is arranged on each side of the first gas outlet end 112. Each second gas outlet end 122 can eject the second auxiliary gas, and an air barrier is formed on each side of the first gas outlet end 112 along the second direction D2. Each air barrier intercepts a corresponding high-probability curling area respectively, reducing the probability of the two high-probability curling areas of the first flame impacting the furnace tube 2.

[0049] In this embodiment, as Figure 2 and Figure 3 shown, the number of the second gas outlet ends 122 is two. The two second gas outlet ends 122 correspond to the two sides of the first gas outlet end 112 in the second direction D2 one by one, so that each second gas outlet end 122 corresponds to a corresponding high-probability curling area respectively. That is to say, when the burner is operating, two air barriers can be formed, and each air barrier corresponds to a corresponding high-probability curling area respectively, so as to play a good interception role for each high-probability curling area. In this embodiment, along the first direction D1, one inner wall of the second gas outlet end 122 in the second direction D2 is inclined towards the other inner wall, and the other inner wall of the second gas outlet end 122 in the second direction D2 is parallel to the first direction D1, so that the second gas outlet end 122 forms a structure with a narrowed opening along the first direction D1.

[0050] In this embodiment, as Figure 1As shown, the first intake end 111 has a square structure. The side wall of the first outlet end 112 facing away from the furnace side wall 3 inclines towards the furnace side wall 3 in the first direction D1, so that the first outlet end 112 has a converging structure in the first direction D1, which is beneficial to forming an attached-wall flame for the first flame and reducing the probability of the first flame impacting the furnace tube 2.

[0051] Optionally, as Figure 1 , Figure 2 and Figure 4 shown, the burner brick 10 is further provided with a protective groove 13 and a mounting groove 15. Among them, the protective groove 13 is opened at the end position of the burner brick 10 along the first direction D1, and the mounting groove 15 is opened on the side wall of the burner brick 10, and the mounting groove 15 is a U-shaped groove. Specifically, one end of the mounting groove 15 penetrates the bottom of the protective groove 13, and the other end of the mounting groove 15 penetrates the bottom of the burner brick 10. The gas component further includes a gas pipe 22. The gas spray head 21 is connected to the gas pipe 22, and the gas spray head 21 is communicated with a gas supply source (not shown in the figure) through the gas pipe 22. The gas pipe 22 is arranged in the mounting groove 15, and the gas spray head 21 is arranged in the protective groove 13. A first spray hole (not shown in the figure) is provided on the side of the gas spray head 21 facing the opening of the protective groove 13. The gas supplied by the gas supply source is transported to the gas spray head 21 through the gas pipe 22 and sprayed out from the first spray hole. The gas sprayed out from the first spray hole is mixed and burned with the first auxiliary gas to form the first flame. Compared with the case where the gas spray head 21 is completely exposed in the high-temperature furnace chamber 1, in this embodiment, arranging the gas spray head 21 in the protective groove 13 can play a good protective role for the gas spray head 21, reduce the probability of blockage of the first spray hole, and provide a strong guarantee for the normal operation of the burner.

[0052] It should be noted that the axis of the first spray hole can be parallel to the first direction D1 or arranged at an angle to the first direction D1, as long as the gas sprayed out from the first spray hole can be mixed and burned with the first auxiliary gas.

[0053] Furthermore, as Figure 2 and Figure 5As shown in the figure, the number of gas nozzles 21 and protective grooves 13 is multiple and they correspond one by one. At least one of the multiple gas nozzles 21 is an ejector nozzle 211. The ejector nozzle 211 is provided with a second spray hole (not shown in the figure). The protective groove 13 accommodating the ejector nozzle 211 is an ejection groove 131. The side wall of the ejection groove 131 is provided with an ejection channel 14. The ejection channel 14 includes a first end 141 and a second end 142. The first end 141 is communicated with the first auxiliary gas flow channel 11. The second end 142 is used to communicate with the furnace chamber 1. The second spray hole points to the second end 142. The second spray hole sprays gas into the ejection channel 14 at a high speed through the second end 142, forming a negative pressure field in the ejection channel 14, so that the flue gas near the second end 142 in the furnace chamber 1 is sucked into the ejection channel 14 under the action of the negative pressure field, and enters the first auxiliary gas flow channel 11 through the first end 141. In the first auxiliary gas flow channel 11, this part of the flue gas is mixed with the auxiliary gas in the first auxiliary gas flow channel 11, and finally sprayed out through the first air outlet end 112 and mixed with the gas sprayed out from the first spray hole for combustion, thus achieving the effect of flue gas recirculation and reducing the nitrogen oxide emission of the burner.

[0054] In this embodiment, the number of the gas nozzles 21, the protective grooves 13, the gas pipes 22 and the installation grooves 15 is five and they correspond one by one. Three of the five gas nozzles 21 are ejector nozzles 211. Three of the five protective grooves 13 are ejection grooves 131. And the three ejector nozzles 211 are respectively arranged in a corresponding ejection groove 131. Each ejection groove 131 is provided with an ejection channel 14, that is, the number of the ejection channels 14 is three. Of course, in other implementation schemes, the number of the gas nozzles 21 can also be two, three, four or six, etc. The number of the ejector nozzles 211 can be one, two, four or five, etc. And all the gas nozzles 21 can be ejector nozzles 211, or some of all the gas nozzles 21 are ejector nozzles 211.

[0055] In this embodiment, as Figure 2 shown, three of the five gas nozzles 21 are located on the side of the burner brick 10 facing the furnace side wall 3, and the remaining two gas nozzles 21 are respectively located on both sides of the burner brick 10 in the second direction D2.

[0056] Optionally, as Figure 1 shown, the direction from the first air inlet end 111 to the first air outlet end 112 is the same as the first direction D1. That is to say, the auxiliary gas flows in the first auxiliary gas flow channel 11 from the first air inlet end 111 to the first air outlet end 112 along the first direction D1. As Figure 5As shown, along the direction from the second end 142 to the first end 141, the ejection channel 14 is inclined toward the first direction D1, which is beneficial for the flue gas and fuel gas mixture in the ejection channel 14 to flow and mix along the first direction D1 with the fuel gas in the first fuel gas flow channel 11 after entering the first fuel gas flow channel 11 through the first end 141.

[0057] Furthermore, if Figure 1 and Figure 5 As shown, the burner also includes a long-lasting lamp, which includes a tube body 32 and a long-lasting lamp nozzle 31 connected to the tube body 32. The tube body 32 is arranged in the wind box 41 and is partially located in the first combustion-supporting gas flow channel 11. The long-lasting lamp nozzle 31 is arranged in the first combustion-supporting gas flow channel 11. The long-lasting lamp can form a second flame at the long-lasting lamp nozzle 31. The first end 141 of the introduction channel 14 points to the second flame, that is, the first end 141 points to the top of the long-lasting lamp nozzle 31, so that the flue gas and gas mixture in the introduction channel 14 can be ignited by the second flame to form a third flame after entering the first combustion-supporting gas flow channel 11 through the first end 141. The gas sprayed from the first nozzle hole and the first combustion-supporting gas are mixed and ignited by the third flame to form the first flame, thereby realizing the ignition of the burner. It should be pointed out that the specific structure of the long-lasting lamp and the working principle of forming the second flame are both existing technologies in this field and will not be repeated here.

[0058] The present embodiment also provides a heating furnace, which includes a furnace tube 2, a furnace chamber 1 and the above-mentioned burner. The furnace tube 2, the burner brick 10 and the gas nozzle 21 are all arranged in the furnace chamber 1. The first gas outlet end 112 is located on the side of the second gas outlet end 122 away from the furnace tube 2. The heating furnace adopts the above-mentioned burner. When the burner is running, the second combustion-supporting gas sprayed from the second gas outlet end 122 forms an air barrier between the first flame and the furnace tube 2. The air barrier can intercept the first flame that rolls toward the furnace tube 2, thereby reducing the probability of the first flame impacting the furnace tube 2, which is beneficial to extending the operation cycle of the furnace tube 2 and the heating furnace.

[0059] Furthermore, the heating furnace is a cracking furnace, such as an ethylene cracking furnace.

[0060] Embodiment 2

[0061] This embodiment provides a burner, which is different from the burner provided in the first embodiment in that:

[0062] like Figure 6 and Figure 7As shown, the number of the second air outlets 122 is three. The three second air outlets 122 are distributed on the burner block 10 along the second direction D2. And the two outer second air outlets 122 correspond one by one to both sides of the first air outlet 112 in the second direction D2, so that each of the outer second air outlets 122 corresponds to a high-probability roll-up area respectively. The middle second air outlet 122 corresponds to the middle area of the first air outlet 112 in the second direction D2. When the burner operates, three air barriers can be formed. The two outer air barriers correspond to a high-probability roll-up area respectively to play a good interception role for the two high-probability roll-up areas of the first flame. The middle air barrier is used to intercept the middle part of the first flame in the second direction D2 to prevent the middle part of the first flame from rolling up towards the furnace tube 2 in the second direction D2.

[0063] For the convenience of understanding, among the three second air outlets 122, the middle second air outlet 122 is hereinafter referred to as the middle second air outlet 122a, and the two outer second air outlets 122 are referred to as the side second air outlets 122b.

[0064] Along the first direction D1, the inner wall on one side of the side second air outlet 122b in the second direction D2 inclines towards the other inner wall, and the other inner wall of the side second air outlet 122b in the second direction D2 is parallel to the first direction D1, so that the side second air outlet 122b forms a structure with a narrowed opening along the first direction D1.

[0065] Along the first direction D1, the two inner walls of the middle second air outlet 122a in the second direction D2 incline towards each other, so that the middle second air outlet 122a forms a structure with a narrowed opening along the first direction D1.

[0066] The rest of the structure of the burner provided in this embodiment is the same as that in the first embodiment, and will not be described in detail.

[0067] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A burner for providing heat to a heating furnace, the heating furnace including a furnace chamber and furnace tubes disposed within the furnace chamber, characterized in that, The burner comprises: A burner brick (10), the burner brick (10) being capable of being arranged in the furnace (1), the burner brick (10) being provided with a first combustion-supporting gas flow channel (11) and a second combustion-supporting gas flow channel (12), the first combustion-supporting gas flow channel (11) comprising a first gas inlet end (111) and a first gas outlet end (112), the second combustion-supporting gas flow channel (12) comprising a second gas inlet end (121) and a second gas outlet end (122), the first gas outlet end (112) being arranged to be located on a side of the second gas outlet end (122) away from the furnace tube (2), and the first gas outlet end (112) and the second gas outlet end (122) being oriented in the same direction; a combustion-supporting gas component, wherein the first gas inlet end (111) and the second gas inlet end (121) are both in communication with the combustion-supporting gas component, the combustion-supporting gas component is used to transport combustion-supporting gas to the first combustion-supporting gas flow channel (11) and the second combustion-supporting gas flow channel (12), and the combustion-supporting gas ejected from the first gas outlet end (112) is a first combustion-supporting gas; A gas component, the gas component comprising a gas nozzle (21), the gas nozzle (21) can be arranged in the furnace (1), and the gas sprayed by the gas nozzle (21) can be mixed with the first supporting gas to burn.

2. The burner according to claim 1, characterized in that, The combustion-supporting gas ejected from the second gas outlet end (122) is a second combustion-supporting gas, and the direction in which the second combustion-supporting gas is ejected from the second gas outlet end (122) is a first direction (D1). Along the first direction (D1), the second gas outlet end (122) is closed.

3. The burner according to claim 2, characterized in that, Along the first direction (D1), at least one of the two inner walls of the second air outlet end (122) in the second direction (D2) is inclined toward the other, and the two inner walls of the second air outlet end (122) in the third direction (D3) are both parallel to the first direction (D1), and the third direction (D3) is the direction in which the second air outlet end (122) points to the first air outlet end (112), the second direction (D2) and the third direction (D3) are in the same plane, and the second direction (D2) is perpendicular to the third direction (D3).

4. The burner according to any one of claims 1-3, characterized in that, The number of the second air outlet ports (122) is at least two.

5. The burner according to claim 4, characterized in that, All the second air outlet ends (122) are distributed along a second direction (D2), the direction in which the second air outlet ends (122) point to the first air outlet ends (112) is a third direction (D3), the second direction (D2) and the third direction (D3) are on the same plane, and the second direction (D2) is perpendicular to the third direction (D3).

6. The burner according to claim 5, characterized in that, Two sides of the first air outlet end (112) in the second direction (D2) respectively correspond to one of the second air outlet ends (122).

7. The burner according to any one of claims 1 to 3, characterized in that, The burner brick (10) is also provided with a protective groove (13), the gas nozzle (21) is arranged in the protective groove (13), and the gas nozzle (21) is provided with a first spray hole on the side facing the notch of the protective groove (13), and the gas sprayed from the first spray hole can be mixed with the first supporting gas and burned.

8. The burner according to claim 7, characterized in that, The number of the gas nozzles (21) and the protective grooves (13) are both multiple and correspond one by one. At least one of the multiple gas nozzles (21) is an ejector nozzle (211). The ejector nozzle (211) is provided with a second nozzle hole. The protective groove (13) accommodating the ejector nozzle (211) is an ejector groove (131). The side wall of the ejector groove (131) is provided with an ejector channel (14). The ejector channel (14) includes a first end (141) and a second end (142). The first end (141) is communicated with the first auxiliary gas flow channel (11). The second end (142) is used for being communicated with the furnace chamber (1). The second nozzle hole points to the second end (142).

9. The burner according to claim 8, characterized in that, The burner further includes a pilot light. The pilot light includes a pilot light nozzle (31). The pilot light nozzle (31) is arranged in the first auxiliary gas flow channel (11). The pilot light can form a second flame at the pilot light nozzle (31). The first end (141) points to the second flame.

10. Heating furnace, characterized in that, It includes a furnace tube (2), a furnace chamber (1) and the burner according to any one of claims 1-9. The furnace tube (2), the burner block (10) and the gas nozzles (21) are all arranged in the furnace chamber (1). The first gas outlet end (112) is located on a side of the second gas outlet end (122) away from the furnace tube (2).

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