Burner

Abstract

The present invention belongs to the technical field of burners, and discloses a burner. The burner includes a burner block, a fuel spray head, a wind box and a coke gas spray gun. The burner block is provided with a second spray hole. The fuel spray head is arranged in the furnace chamber of the cracking furnace, and fuel gas can be sprayed into the furnace chamber through the fuel spray head. The wind box is communicated with the furnace chamber, and combustion-supporting gas can enter the furnace chamber through the wind box and mix with the fuel gas to burn to form a flame. The flame has a first combustion zone and a second combustion zone. The coke gas spray gun includes a gun body and a branch pipe. The gas outlet end of the gun body is provided with a first spray hole facing the first combustion zone. The two ends of the branch pipe are respectively communicated with the gun body and the second spray hole. The second spray hole is arranged facing the second combustion zone. The coke gas in the gun body can be sprayed into the first combustion zone and the second combustion zone through the first spray hole and the second spray hole respectively, so that the combustible particulate matters in the coke gas can burn in the first combustion zone and the second combustion zone respectively.

Description

Technical Field

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

[0002] With the rapid development of the petrochemical industry, the demand for ethylene production is also increasing. Ethylene plays a pivotal role in the petrochemical industry. Among them, the ethylene cracking furnace is the core device for producing ethylene. In actual work, as the operating time of the ethylene cracking furnace increases, coke scale will form in the furnace tube of the ethylene cracking furnace. In order to ensure the service life and operation cycle of the ethylene cracking furnace, the furnace tube needs to be regularly charred.

[0003] The char treatment usually involves passing steam or a mixture of steam and air into the furnace tubes of an ethylene cracking furnace to decompose the coke at a certain temperature and remove it from the furnace tubes. During this process, the ethylene cracking furnace produces a large amount of char gas, which mainly contains pollutants such as steam, combustible particles and CO2. If the char gas is directly discharged into the atmosphere, it will be very unfavorable to the environment.

[0004] Therefore, the present invention proposes a burner, aiming to achieve efficient treatment of combustible particulate matter in char gas. Summary of the invention

[0005] The object of the present invention is to provide a burner that can burn combustible particulate matter in charred gas, and the burner also realizes the diversion of charred gas to achieve the effect of efficiently treating combustible particulate matter in charred gas.

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

[0007] Burner, comprising:

[0008] A burner brick, which can be fixed on the furnace body of the cracking furnace and is provided with a second spray hole;

[0009] A fuel nozzle, the fuel nozzle is connected to a fuel gas source, and the fuel nozzle is arranged in the furnace of the cracking furnace for injecting fuel gas into the furnace;

[0010] A wind box is connected to the furnace, and the combustion-supporting gas can enter the furnace through the wind box and mix with the fuel gas to burn to form a flame, and the flame has a first combustion zone and a second combustion zone;

[0011] Scorched gas spray gun, the scorched gas spray gun includes a gun body and a branch pipe. The gun body has an air inlet end and an air outlet end. Scorched gas can enter the gun body through the air inlet end. The air outlet end is provided with a first spray hole, and the first spray hole faces the first combustion zone. Scorched gas can be sprayed into the first combustion zone through the first spray hole. One end of the branch pipe is communicated with the gun body, and the other end of the branch pipe is communicated with a second spray hole. The second spray hole faces the second combustion zone, and the scorched gas can also be sprayed into the second combustion zone through the second spray hole.

[0012] Optionally, the first combustion zone is the central combustion zone, and the second combustion zone is the peripheral combustion zone.

[0013] Optionally, a gas flow channel is further provided on the burner block. The air box and the furnace are communicated through the gas flow channel. The number of fuel nozzles is multiple, and the multiple fuel nozzles are arranged around the gas flow channel. The air outlet end is located in the gas flow channel, and the second spray hole is opened on the side wall of the gas flow channel.

[0014] Optionally, the number of the second spray holes is multiple.

[0015] Optionally, the multiple second spray holes and the multiple fuel nozzles are both evenly distributed along the circumferential direction of the gas flow channel, and the multiple second spray holes and the multiple fuel nozzles are arranged staggeredly.

[0016] Optionally, the flame further has a third combustion zone, and the third combustion zone is located between the first combustion zone and the second combustion zone. The branch pipe is provided with a third spray hole, and the third spray hole faces the third combustion zone. The scorched gas can also be sprayed into the third combustion zone through the third spray hole.

[0017] Optionally, the number of the branch pipes is multiple, and the multiple branch pipes are evenly distributed along the circumferential direction of the gas flow channel. Each branch pipe is provided with a third spray hole.

[0018] Optionally, the number of the third spray holes is multiple, and the multiple third spray holes are arranged at intervals along the extending direction of the branch pipe.

[0019] Optionally, the gas flow channel has a first end and a second end. The air box is communicated with the first end, the second end is located in the furnace, and the air outlet end is located at the first end;

[0020] Or, the gas flow channel has a first end and a second end. The air box is communicated with the first end, the second end is located in the furnace, and the air outlet end is located between the first end and the second end.

[0021] Optionally, the air outlet end is in a hemispherical structure protruding towards the first combustion zone. The number of the first spray holes is multiple, and the multiple first spray holes are evenly distributed along the circumferential direction of the air outlet end.

[0022] Beneficial effects:

[0023] The burner provided by the present invention is provided with a first spray hole at the gas outlet end of the gun body, and the first spray hole is arranged towards the first combustion zone. At the same time, a branch pipe communicated with the gun body is provided, so that the branch pipe is communicated with the second spray hole on the burner brick, and the second spray hole is arranged towards the second combustion zone, so that the charred gas in the gun body can be sprayed into the first combustion zone through the first spray hole and into the second combustion zone through the second spray hole, realizing the combustion treatment of the combustible particulate matter in the charred gas; moreover, the burner provided by the present invention sprays the charred gas into two different combustion zones of the combustion flame respectively, realizing the diversion treatment of the charred gas. When the input amount of the charred gas is large, the combustible particulate matter in the charred gas is burned respectively in different regions of the combustion flame, which can reduce the probability that the combustible particulate matter cannot be fully burned due to a certain combustion zone reaching the saturation state. The combustible particulate matter in the charred gas can be fully burned in two different combustion zones respectively, improving the total combustion amount of the combustible particulate matter and also improving the total treatment amount of the burner for the charred gas, and finally achieving the effect of improving the ability of the burner to treat the combustible particulate matter in the charred gas. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 is a schematic structural diagram of the burner provided by the present invention Figure 2 ;

[0026] Figure 3 is a schematic structural diagram of the burner provided by the present invention Figure 3 .

[0027] In the figure:

[0028] 10, furnace; 20, furnace body; 31, first combustion zone; 32, second combustion zone; 33, third combustion zone; 100, fuel spray head; 200, air box; 310, gun body; 311, intake end; 312, outlet end; 320, branch pipe; 410, first spray hole; 420, second spray hole; 430, third spray hole; 500, burner brick; 510, gas flow channel; 511, first end; 512, second end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] 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 sake of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0030] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may 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 may be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0032] 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 thus should not be construed 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 meanings.

[0033] This embodiment provides a burner, which can burn the combustible particulate matter in the charred gas. Moreover, the burner also realizes the diversion of the charred gas, so that part of the charred gas is sprayed into the first combustion zone of the combustion flame, and part of the charred gas is sprayed into the second combustion zone of the combustion flame, achieving the effect of efficient treatment of the combustible particulate matter in the charred gas.

[0034] Specifically, as Figures 1 to 3As shown in the figure, the burner includes a burner brick 500, a fuel nozzle 100, a wind box 200, and a char gas spray gun. The burner brick 500 can be fixed on the furnace body 20 of the cracking furnace. A second spray hole 420 is provided on the burner brick 500. The fuel nozzle 100 is communicated with a fuel gas source. The fuel nozzle 100 is arranged in the furnace chamber 10 of the cracking furnace and is used for spraying fuel gas into the furnace chamber 10. The wind box 200 is communicated with the furnace chamber 10. Combustion-supporting gas can enter the furnace chamber 10 through the wind box 200 and mix with the fuel gas to burn and form a flame. The flame has a first combustion zone 31 and a second combustion zone 32. The char gas spray gun includes a gun body 310 and a branch pipe 320. The gun body 310 has an air inlet end 311 and an air outlet end 312. Char gas can enter the gun body 310 through the air inlet end 311. A first spray hole 410 is provided at the air outlet end 312. The first spray hole 410 faces the first combustion zone 31. Char gas can be sprayed into the first combustion zone 31 through the first spray hole 410. One end of the branch pipe 320 is communicated with the gun body 310, and the other end of the branch pipe 320 is communicated with the second spray hole 420. The second spray hole 420 faces the second combustion zone 32. Char gas can also be sprayed into the second combustion zone 32 through the second spray hole 420.

[0035] For the burner provided in this embodiment, a first spray hole 410 is provided at the air outlet end 312 of the gun body 310, and the first spray hole 410 is arranged to face the first combustion zone 31. At the same time, a branch pipe 320 communicated with the gun body 310 is provided, so that the branch pipe 320 is communicated with the second spray hole 420 on the burner brick 500, and the second spray hole 420 is arranged to face the second combustion zone 32, so that the char gas in the gun body 310 can be sprayed into the first combustion zone 31 through the first spray hole 410 and into the second combustion zone 32 through the second spray hole 420, realizing the combustion treatment of combustible particulate matters in the char gas; moreover, for the burner provided in this embodiment, the char gas is sprayed into two different combustion zones (the first combustion zone 31 and the second combustion zone 32) of the combustion flame respectively, realizing the split-flow treatment of the char gas. When the input amount of the char gas is large, the combustible particulate matters in the char gas are burned respectively in different regions of the combustion flame, which can reduce the probability that the combustible particulate matters cannot be fully burned due to a certain combustion zone reaching the saturation state. The combustible particulate matters in the char gas can be fully burned in two different combustion zones respectively, improving the total combustion amount of the combustible particulate matters and also improving the total treatment amount of the burner for the char gas, and finally achieving the effect of improving the ability of the burner to treat the combustible particulate matters in the char gas.

[0036] Preferably, as Figures 1 to 3As shown, the first combustion zone 31 is the central combustion zone, and the second combustion zone 32 is the peripheral combustion zone. On the one hand, it makes the charred gas disperse as much as possible. On the other hand, the flame temperature in the central combustion zone is relatively high. Injecting part of the charred gas into the central combustion zone is conducive to the full combustion of combustible particulate matter in the high-temperature flame environment, thereby improving the ability of the burner to treat combustible particulate matter in the charred gas. On the other hand, generally speaking, the temperature of the charred gas is lower than that of the combustion flame. Therefore, injecting part of the charred gas into the central combustion zone achieves the effect of cooling the high-temperature combustion zone of the flame, and thus can effectively reduce the NO X emission of the burner, which is beneficial to environmental protection.

[0037] Optionally, as Figures 1 to 3 shown, the burner block 500 is also provided with a gas flow channel 510. The air box 200 is communicated with the furnace 10 through the gas flow channel 510. The number of fuel nozzles 100 is multiple. The multiple fuel nozzles 100 are arranged around the gas flow channel 510. The air outlet end 312 is located in the gas flow channel 510. The second spray hole 420 is opened on the side wall of the gas flow channel 510. Thus, part of the charred gas is injected into the first combustion zone 31 through the first spray hole 410, and part of the charred gas is injected into the second combustion zone 32 through the second spray hole 420.

[0038] Optionally, as Figures 1 to 3 shown, the number of the second spray holes 420 is multiple to increase the flow rate of the charred gas injected into the second combustion zone 32 through the second spray holes 420, thereby improving the ability of the burner to treat combustible particulate matter in the charred gas.

[0039] Furthermore, as Figures 1 to 3 shown, the multiple second spray holes 420 and the multiple fuel nozzles 100 are both evenly distributed along the circumferential direction of the gas flow channel 510, and the multiple second spray holes 420 and the multiple fuel nozzles 100 are arranged in a staggered manner, making the combustion in the second combustion zone 32 (i.e., the peripheral combustion zone of the flame) relatively stable. And, in the circumferential direction of the second combustion zone 32, the injection amount of the charred gas is relatively uniform, achieving the effect of dispersing the charred gas in the second combustion zone 32, so that the particulate matter in the charred gas can be fully burned in the second combustion zone 32.

[0040] Optionally, as Figures 1 to 3As shown, the flame also has a third combustion zone 33, which is located between the first combustion zone 31 and the second combustion zone 32. The branch pipe 320 is provided with a third injection hole 430, and the third injection hole 430 faces the third combustion zone 33. The charred gas can also be injected into the third combustion zone 33 through the third injection hole 430 to further split the charred gas, so that the charred gas can burn in three different regions of the combustion flame respectively, further reducing the probability that combustible particulate matter cannot be fully burned due to a certain combustion zone reaching a saturated state. Furthermore, the particulate matter in the charred gas can be fully burned in three different combustion zones respectively, further increasing the total combustion amount of combustible particulate matter in the burner, and further increasing the total processing amount of the charred gas by the burner, finally achieving the effect of further improving the ability of the burner to process combustible particulate matter in the charred gas.

[0041] Furthermore, as Figures 1 to 3 shown, the number of branch pipes 320 is multiple, and the multiple branch pipes 320 are evenly distributed along the circumferential direction of the gas flow channel 510. Each branch pipe 320 is provided with a third injection hole 430, so that the charred gas injected into the third combustion zone 33 is relatively uniform in the circumferential direction of the third combustion zone 33, achieving the effect of dispersing the charred gas in the third combustion zone 33, and enabling the combustible particulate matter in the charred gas to be fully burned in the third combustion zone 33.

[0042] Furthermore, as Figures 1 to 3 shown, the multiple branch pipes 320 are all arranged in the gas flow channel 510 to improve the consistency of the overall structure of the burner.

[0043] Furthermore, as Figures 1 to 3 shown, the multiple branch pipes 320 correspond one by one to the multiple second injection holes 420, so that the charred gas ejected from the multiple second injection holes 420 is relatively uniform, and further enabling the combustible particulate matter in the charred gas ejected from each second injection hole 420 to be fully burned.

[0044] Optionally, as Figures 1 to 3 shown, the number of the third injection holes 430 is multiple, and the multiple third injection holes 430 are arranged at intervals along the extending direction of the branch pipe 320, and the charred gas is split in the radial direction of the third combustion zone 33, so that the charred gas injected into the third combustion zone 33 is relatively uniform in the radial direction of the third combustion zone 33, further improving the sufficiency of the combustion of the combustible particulate matter in the third combustion zone 33.

[0045] Optionally, as Figures 1 to 3As shown, the gas flow channel 510 has a first end 511 and a second end 512. The bellows 200 is in communication with the first end 511. The second end 512 is located inside the furnace 10. The gas outlet end 312 of the gun body 310 is located between the first end 511 and the second end 512. Further, the first spray hole 410 opened at the gas outlet end 312 is also located between the first end 511 and the second end 512. The charred gas in the gun body 310 is ejected from the first spray hole 410 and then enters the gas flow channel 510. At the same time, the combustion-supporting gas sequentially passes through the bellows 200 and the first end 511 and enters the gas flow channel 510. Inside the gas flow channel 510, the charred gas and the combustion-supporting gas are mixed to form a mixed gas. Then, the mixed gas enters the furnace 10 through the second end 512, mixes with the fuel gas and burns. This structure realizes the mixing of the charred gas and the combustion-supporting gas, enabling the combustible particulate matter in the charred gas to be more evenly dispersed in the mixed gas formed by the mixing of the charred gas and the combustion-supporting gas. Furthermore, the combustible particulate matter in the charred gas sprayed into the first combustion zone 31 can burn more fully and evenly, further improving the efficiency of the burner in treating the combustible particulate matter in the charred gas.

[0046] In another embodiment, the gas outlet end 312 of the gun body 310 can also be arranged at the first end 511 of the gas flow channel 510. At this time, the first spray hole 410 opened at the gas outlet end 312 is also located at the first end 511 of the gas flow channel 510, and the effect of mixing the charred gas and the combustion-supporting gas in the gas flow channel 510 can also be achieved.

[0047] Optionally, as Figures 1 to 3 shown, the gas outlet end 312 is in a hemispherical structure protruding towards the first combustion zone 31. The number of the first spray holes 410 is multiple, and the multiple first spray holes 410 are evenly distributed along the circumferential direction of the gas outlet end 312, achieving the effect that the charred gas sprayed into the first combustion zone 31 from the first spray holes 410 is relatively dispersed and uniform in the circumferential direction of the first combustion zone 31, enabling the particulate matter in the charred gas to burn fully in the first combustion zone 31. In other implementation schemes, the gas outlet end 312 can also be arranged in a flat shape, a shape concave towards the first combustion zone 31 or other shapes. Of course, corresponding to different shapes of the gas outlet end 312, the spray jet shapes of the charred gas sprayed into the first combustion zone 31 by the multiple first spray holes 410 are also different. For example, if the gas outlet end 312 is in a flat shape, the spray jet shape of the charred gas sprayed into the first combustion zone 31 by the multiple first spray holes 410 is vertical. If the gas outlet end 312 is in a shape concave towards the first combustion zone 31, the spray jet shape of the charred gas sprayed into the first combustion zone 31 by the multiple first spray holes 410 is converging. The shape of the gas outlet end 312 can be determined according to the requirement of the spray jet shape of the charred gas sprayed into the first combustion zone 31, and will not be listed one by one here.

[0048] Optionally, as Figures 1 to 3As shown, the gun body 310 is disposed through the air box 200 to reduce the overall volume of the burner. Optionally, the fuel nozzle 100 is communicated with the fuel gas source through a fuel inlet pipe, and the fuel inlet pipe is fixed on the burner block 500 to reduce the overall volume of the burner and improve the overall structural consistency of the burner at the same time.

[0049] It should be noted that the respective injection amounts and specific injection angles of the first injection hole 410, the second injection hole 420, and the third injection hole 430 are determined according to the injection amount and specific injection angle of the fuel nozzle 100. In practical applications, it can be determined with the assistance of CFD simulation software for design.

[0050] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating 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. Burner, characterized in that, Comprising: A burner brick (500) which can be fixed on the furnace body (20) of the cracking furnace, and a second spray hole (420) is provided on the burner brick (500); A fuel spray head (100) which is communicated with a fuel gas source, and the fuel spray head (100) is arranged in the furnace chamber (10) of the cracking furnace for spraying fuel gas into the furnace chamber (10); An air box (200) which is communicated with the furnace chamber (10), and combustion-supporting gas can enter the furnace chamber (10) through the air box (200) and mix with the fuel gas to burn to form a flame, and the flame has a first combustion zone (31) and a second combustion zone (32); A coke-burning gas spray gun, which comprises a gun body (310) and a branch pipe (320), the gun body (310) penetrates through the air box (200), the gun body (310) has an air inlet end (311) and an air outlet end (312), coke-burning gas can enter the gun body (310) through the air inlet end (311), a first spray hole (410) is provided at the air outlet end (312), the first spray hole (410) faces the first combustion zone (31), and the coke-burning gas can be sprayed into the first combustion zone (31) through the first spray hole (410), one end of the branch pipe (320) is communicated with the gun body (310), the other end of the branch pipe (320) is communicated with the second spray hole (420), the second spray hole (420) faces the second combustion zone (32), and the coke-burning gas can also be sprayed into the second combustion zone (32) through the second spray hole (420).

2. The burner according to claim 1, characterized in that, The first combustion zone (31) is a central combustion zone, and the second combustion zone (32) is an outer peripheral combustion zone.

3. The burner according to claim 2, characterized in that, A gas flow channel (510) is further provided on the burner brick (500), the air box (200) is communicated with the furnace chamber (10) through the gas flow channel (510), the number of the fuel spray heads (100) is multiple, and the multiple fuel spray heads (100) are arranged around the gas flow channel (510), the air outlet end (312) is located in the gas flow channel (510), and the second spray hole (420) is opened on the side wall of the gas flow channel (510).

4. The burner according to claim 3, characterized in that, The number of the second spray holes (420) is multiple.

5. The burner according to claim 4, characterized in that, The multiple second spray holes (420) and the multiple fuel spray heads (100) are both evenly distributed along the circumferential direction of the gas flow channel (510), and the multiple second spray holes (420) and the multiple fuel spray heads (100) are arranged staggeredly.

6. The burner according to claim 3, characterized in that, The flame further has a third combustion zone (33), the third combustion zone (33) is located between the first combustion zone (31) and the second combustion zone (32), a third spray hole (430) is provided on the branch pipe (320), the third spray hole (430) faces the third combustion zone (33), and the coke-burning gas can also be sprayed into the third combustion zone (33) through the third spray hole (430).

7. The burner according to claim 6, characterized in that, The number of the branch pipes (320) is multiple, and the multiple branch pipes (320) are evenly distributed along the circumferential direction of the gas flow channel (510). The third spray holes (430) are provided on each of the branch pipes (320).

8. The burner according to claim 6, characterized in that, The number of the third spray holes (430) is multiple, and the multiple third spray holes (430) are arranged at intervals along the extending direction of the branch pipe (320).

9. The burner according to any one of claims 3-8, characterized in that, The gas flow channel (510) has a first end (511) and a second end (512). The air box (200) is communicated with the first end (511), the second end (512) is located in the furnace chamber (10), and the air outlet end (312) is located at the first end (511). Or, the gas flow channel (510) has a first end (511) and a second end (512). The air box (200) is communicated with the first end (511), the second end (512) is located in the furnace chamber (10), and the air outlet end (312) is located between the first end (511) and the second end (512).

10. The burner according to any one of claims 1-8, characterized in that, The air outlet end (312) is in a hemispherical structure protruding towards the first combustion zone (31). The number of the first spray holes (410) is multiple, and the multiple first spray holes (410) are evenly distributed along the circumferential direction of the air outlet end (312).

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