Side wall gas burner for treating a furnace offgas

Abstract

The present application belongs to the technical field of coke oven gas treatment, and discloses a kind of side wall gas burners for treating coke oven gas of return hearth, and burner brick is fixed on the side wall of the hearth of cracking furnace, and burner brick is provided with first flow channel and second flow channel, both ends of first flow channel are communicated with combustion air source and hearth of cracking furnace respectively, second flow channel is communicated with first flow channel, and second flow channel is communicated with hearth of cracking furnace, and coke oven gas flow pipe of coke oven gas nozzle assembly is arranged in burner brick, and both ends of coke oven gas flow pipe are communicated with coke oven gas source and second flow channel respectively, which realizes the shunt of coke oven gas, can make part of coke oven gas mixed with combustion air to realize sufficient combustion, and avoids the problem that the combustion flame of small combustion capacity side wall type burner is extinguished by a large amount of coke oven gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coke burning gas treatment, and particularly relates to a side wall gas burner for treating coke burning gas returned to a furnace. BACKGROUND

[0002] With the increase of the operation time of a cracking furnace, coke dirt is formed in the furnace tube of the cracking furnace and in the quenching heat exchanger. In order to ensure the service life and operation cycle of the cracking furnace, the cracking furnace needs to be regularly subjected to online coke cleaning treatment. A large amount of coke burning gas is generated in the coke cleaning process, and the coke burning gas mainly includes steam, small particle size particles, CO and CO2, etc. If the coke burning gas is directly discharged into the atmosphere, it will pollute the atmospheric environment. Therefore, the coke burning gas needs to be treated.

[0003] A common coke burning gas treatment method at present is to pass the coke burning gas into the furnace chamber of the cracking furnace. However, the coke burning gas passing into the furnace chamber is not easy to mix with the combustion air, so that the small particle size particles in the coke burning gas are not easy to fully burn. If all the coke burning gas is passed into the combustion air flow channel so that all the coke burning gas is mixed with the combustion air in the combustion air flow channel, too much coke burning gas is sprayed from the combustion air flow channel into the flame zone, which is easy to cause the problem that the flame is extinguished. This problem is particularly prominent on the side wall gas burner with small combustion capacity.

[0004] Therefore, how to both improve the burning rate of the small particle size particles in the coke burning gas and avoid the coke burning gas from extinguishing the combustion flame of the side wall gas burner is a technical problem that needs to be solved by the person skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a side wall gas burner for treating coke burning gas returned to a furnace chamber, which realizes the shunting of the coke burning gas, can make part of the coke burning gas mixed with the combustion air to realize full combustion, and avoids the problem that the combustion flame of the side wall burner with small combustion capacity is extinguished by a large amount of coke burning gas.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The side wall gas burner for treating coke burning gas returned to a furnace chamber comprises:

[0008] A burner brick is used to be fixed on the side wall of the furnace chamber of the cracking furnace. The burner brick is provided with a first flow channel and a second flow channel. One end of the first flow channel is in communication with a combustion air source, and the other end of the first flow channel is in communication with the furnace chamber of the cracking furnace. The second flow channel is in communication with the first flow channel and the furnace chamber of the cracking furnace.

[0009] A coke burning gas spray pipe assembly comprises a coke burning gas flow pipe. The coke burning gas flow pipe is arranged in the burner brick, one end of the coke burning gas flow pipe is in communication with a coke burning gas source, and the other end of the coke burning gas flow pipe is in communication with the second flow channel.

[0010] Optionally, the burner brick is further provided with a third flow channel, two ends of the third flow channel are communicated with the second flow channel and the first flow channel respectively, a through hole is formed in the burner brick, and a hole opening of the through hole is located in the furnace chamber of the cracking furnace, and a hole channel of the through hole forms the second flow channel.

[0011] Optionally, an end of the through hole is a horn mouth, and a large-diameter end of the horn mouth faces the furnace chamber of the cracking furnace.

[0012] Optionally, the third flow channel is a cuboid flow channel, and a long side of the third flow channel is parallel to an axis of the second flow channel.

[0013] Optionally, the coke burning gas injection pipe assembly further comprises a coke burning gas injection pipe, the coke burning gas injection pipe is arranged in the second flow channel and communicated with the coke burning gas flow pipe, the coke burning gas injection pipe is provided with coke burning gas injection holes, and the coke burning gas flow pipe is communicated with the second flow channel through the coke burning gas injection holes.

[0014] Optionally, the coke burning gas injection holes are a plurality of holes.

[0015] Optionally, the plurality of coke burning gas injection holes are uniformly and spacedly arranged along an axis of the coke burning gas injection pipe.

[0016] Optionally, both ends of the coke burning gas injection pipe are provided with openings.

[0017] Optionally, the coke burning gas flow pipe is a plurality of pipes.

[0018] Optionally, the coke burning gas injection pipe assembly further comprises a coke burning gas inlet pipe, the coke burning gas flow pipe is communicated with a coke burning gas source through the coke burning gas inlet pipe.

[0019] Beneficial effects:

[0020] The side wall gas burner for treating coke burning gas in a furnace chamber provided by the application is a side wall burner, a part of coke burning gas in the coke burning gas flow pipe enters the first flow channel through the second flow channel, mixes with combustion air in the first flow channel, and is then injected into a combustion flame area in the furnace chamber of the cracking furnace, so that the part of coke burning gas is combusted, another part of coke burning gas in the coke burning gas flow pipe enters the furnace chamber of the cracking furnace through the second flow channel, and the part of coke burning gas diffuses to the combustion flame area in the furnace chamber of the cracking furnace, so that the part of coke burning gas is combusted, the side wall gas burner for treating coke burning gas in a furnace chamber realizes the shunting of coke burning gas, can make part of coke burning gas mix with combustion air to realize sufficient combustion, and avoids the problem that the combustion flame of a side wall burner with small combustion capacity is extinguished by a large amount of coke burning gas. In addition, when the cracking furnace is in a normal working condition, i.e., the cracking furnace is not subjected to decoking treatment, flue gas in the furnace chamber of the cracking furnace can enter the first flow channel through the second flow channel, mix with combustion air in the first flow channel, and then be injected into the combustion flame area in the furnace chamber of the cracking furnace, so that the flue gas is circularly combusted. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a cross-sectional structure schematic diagram of a side wall gas burner for treating return hearth coke oven gas provided by the present application;

[0022] Fig. 2 is a top view of a side wall gas burner for treating return hearth coke oven gas provided by the present application;

[0023] Fig. 3 is a structure schematic diagram of a coke oven gas injection pipe assembly provided by the present application.

[0024] In the drawings:

[0025] 100, burner brick; 110, first flow channel; 120, second flow channel; 130, third flow channel; 140, accommodating hole; 200, coke oven gas injection pipe assembly; 210, coke oven gas flow pipe; 220, coke oven gas injection pipe; 221, coke oven gas injection hole; 230, coke oven gas inlet pipe; 300, air bellow. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0027] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0030] This embodiment provides a side-wall gas burner for processing coke gas returning to the furnace. It is a side-wall burner that achieves the diversion of coke gas, which can not only mix part of the coke gas with the combustion air to achieve complete combustion, but also avoid the problem that the combustion flame of the side-wall burner with smaller combustion capacity is extinguished by a large amount of coke gas.

[0031] Specifically, such as Figs. 1-3 As shown, the sidewall gas burner for processing coke gas returning to the furnace includes a burner brick 100 and a coke gas nozzle assembly 200. The burner brick 100 is used to fix on the sidewall of the pyrolysis furnace. The burner brick 100 is provided with a first flow channel 110, a second flow channel 120 and a receiving hole 140. One end of the first flow channel 110 is connected to the combustion air source and the other end of the first flow channel 110 is connected to the pyrolysis furnace. The second flow channel 120 is connected to the first flow channel 110 and the pyrolysis furnace. The coke gas nozzle assembly 200 includes a coke gas flow pipe 210. The coke gas flow pipe 210 passes through the receiving hole 140 and one end of the coke gas flow pipe 210 is connected to the coke gas source and the other end of the coke gas flow pipe 210 is connected to the second flow channel 120.

[0032] A portion of the coking gas in the coking gas flow pipe 210 enters the first flow pipe 110 through the second flow channel 120, mixes with the combustion air in the first flow channel 110, and is then injected together into the combustion flame zone in the pyrolysis furnace to achieve complete combustion of this portion of coking gas. Another portion of the coking gas in the coking gas flow pipe 210 enters the pyrolysis furnace through the second flow channel 120. This portion of coking gas diffuses into the combustion flame zone in the pyrolysis furnace to achieve combustion of this portion of coking gas. This treatment of the coking gas in the pyrolysis furnace is achieved by using a side-wall gas burner to divert the coking gas, which not only allows a portion of the coking gas to mix with the combustion air for complete combustion, but also avoids the problem of the combustion flame of the side-wall burner, which has a smaller combustion capacity, being extinguished by a large amount of coking gas. Secondly, when the pyrolysis furnace is operating under normal conditions, i.e., without decoking, the flue gas in the furnace can enter the first channel 110 through the second channel 120, mix with the combustion air in the first channel 110, and then be injected together into the combustion flame zone of the furnace, achieving cyclic combustion of the flue gas. Thirdly, when the pyrolysis furnace is undergoing decoking, the coking gas injected into the combustion flame zone along with the combustion air can cool the combustion flame, reducing the peak flame temperature and thus reducing NO₂. X The effect on emissions: When the pyrolysis furnace is operating under normal conditions, the flue gas injected into the combustion flame zone along with the combustion air can cool the combustion flame, reducing the peak flame temperature, and thus reducing NO. X Regarding the effect on emissions, it is evident that, regardless of whether it is in the coke removal process or in the normal operation of the pyrolysis furnace, the side-wall gas burner for treating coke gas returning to the furnace provided in this embodiment effectively reduces NO. X The effect of emissions.

[0033] It should be noted that the above-mentioned cracking furnace reduces NO under normal operating conditions. X The emission effect is particularly evident in side-wall burners. Because side-wall burners have a lower combustion capacity, the amount of flue gas introduced through the second flow channel 120 is just enough for them to utilize and burn, and it also helps to cool the flame. However, if this structure is applied to a bottom burner, the combustion capacity of the bottom burner is much greater than that of the side-wall burner, and its flame intensity is very high. Therefore, the amount of flue gas introduced into the bottom burner is negligible, and the small amount of flue gas cannot cool the flame. Furthermore, the aforementioned coking gas source is the furnace tube of the pyrolysis furnace. When the pyrolysis furnace is performing coking treatment, the coking gas in the furnace tube enters the second flow channel 120 through the coking gas flow pipe 210.

[0034] Optionally, such as Figs. 1-3As shown, the combustion air source is a wind box 300, the first flow channel 110 is substantially L-shaped, one end of the first flow channel 110 is located in the furnace chamber of the cracking furnace, and the other end is in communication with the wind box 300, and the combustion air enters the first flow channel 110 and the furnace chamber of the cracking furnace in turn through the wind box 300.

[0035] Optionally, as shown, Figs. 1-3 the third flow channel 130 is further arranged on the burner brick 100, the two ends of the third flow channel 130 are in communication with the second flow channel 120 and the first flow channel 110 respectively, a through hole is arranged on the burner brick 100, the hole of the through hole is located in the furnace chamber of the cracking furnace, and the hole of the through hole forms the second flow channel 120, so that the second flow channel 120 is in communication with the first flow channel 110 and the furnace chamber of the cracking furnace at the same time.

[0036] Further, as shown, Figs. 1-3 the third flow channel 130 is a cuboid flow channel, and the long side of the third flow channel 130 is parallel to the axis of the second flow channel 120, so that the coking gas in the second flow channel 120 can pass through the third flow channel 130 into the first flow channel 110 more dispersedly and uniformly, thereby improving the uniformity of the mixture of the coking gas and the combustion air in the first flow channel 110 and improving the combustion effect of the coking gas.

[0037] Optionally, as shown, Figs. 1-3 the end of the through hole is a horn mouth, and the large-diameter end of the horn mouth faces the furnace chamber of the cracking furnace, so that the coking gas can be sprayed into the furnace chamber of the cracking furnace more dispersedly, thereby enabling the particulate matter in the coking gas to be fully combusted, secondly, the shape of the horn mouth can make the sprayed coking gas more uniformly dispersed in the circumferential direction of the spray outlet, further improving the probability of full combustion of the coking gas, and thirdly, this structure can also improve the flow of flue gas in the furnace chamber of the cracking furnace into the second flow channel 120, thereby improving the circulating combustion efficiency of the flue gas under normal working conditions of the cracking furnace.

[0038] Optionally, as shown, Figs. 1-3 the coking gas injection pipe assembly 200 further comprises a coking gas injection pipe 220, the coking gas injection pipe 220 is arranged in the second flow channel 120 and coaxial with the second flow channel 120, the coking gas injection pipe 220 is in communication with the coking gas flow pipe 210, the coking gas injection pipe 220 is provided with a coking gas injection hole 221, the coking gas flow pipe 210 is in communication with the second flow channel 120 through the coking gas injection hole 221, and the coking gas in the coking gas flow pipe 210 is sprayed into the second flow channel 120 through the coking gas injection hole 221.

[0039] Further, as shown, Figs. 1-3As shown, the number of the coke burning gas injection holes 221 is multiple, so as to increase the coke burning gas injection amount of the second flow channel 120. Preferably, the multiple coke burning gas injection holes 221 are uniformly spaced along the axis of the coke burning gas injection pipe 220, so that the coke burning gas injected into the second flow channel 120 is relatively uniform in the axial direction of the second flow channel 120.

[0040] Optionally, both ends of the coke burning gas injection pipe 220 are provided with openings. When the cracking furnace is in normal working condition, a part of the flue gas in the cracking furnace chamber directly enters the first flow channel 110 from the second flow channel 120, and another part of the flue gas enters the coke burning gas injection pipe 220 through the openings, and then is injected into the second flow channel 120 from the coke burning gas injection holes 221 of the coke burning gas injection pipe 220, and then enters the first flow channel 110 from the second flow channel 120. The setting of the openings increases the flue gas injection amount into the first flow channel 110, and further improves the circulating combustion efficiency of the flue gas under normal working condition of the cracking furnace.

[0041] Optionally, as shown, Figs. 1-3 The number of the coke burning gas flow pipes 210 is multiple, and in the embodiment, three coke burning gas flow pipes 210 are provided. In other embodiments, the coke burning gas flow pipes 210 can be two, four or five, etc. The setting of multiple coke burning gas flow pipes 210 can increase the coke burning gas injection amount into the second flow channel 120, and further improve the processing efficiency of the coke burning gas.

[0042] Optionally, as shown, Figs. 1-3 Figs. 1-3 The coke burning gas injection pipe assembly 200 further comprises a coke burning gas injection pipe 230, and the coke burning gas flow pipes 210 are communicated with the coke burning gas source through the coke burning gas injection pipe 230. In the embodiment, the coke burning gas injection pipe 230 is communicated with the furnace pipe of the cracking furnace and the multiple coke burning gas flow pipes 210, respectively. When the cracking furnace is subjected to decoking treatment, the coke burning gas in the furnace pipe of the cracking furnace enters the coke burning gas injection pipe 230, and then enters the multiple coke burning gas flow pipes 210, respectively.

[0043] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A side wall gas burner for treating a return furnace coke oven gas, characterized in that The application relates to a burner brick (100) for being fixed on a side wall of a cracking furnace hearth, wherein a first flow channel (110) and a second flow channel (120) are arranged on the burner brick (100), one end of the first flow channel (110) is communicated with a combustion air source, the other end of the first flow channel (110) is communicated with the cracking furnace hearth, the second flow channel (120) is communicated with the first flow channel (110), and the second flow channel (120) is communicated with the cracking furnace hearth; a coke burning gas flow pipe assembly (200) comprises a coke burning gas flow pipe (210) which is arranged in the burner brick (100), one end of the coke burning gas flow pipe (210) is communicated with a coke burning gas source, and the other end of the coke burning gas flow pipe (210) is communicated with the second flow channel (120). The burner brick (100) is further provided with a third flow channel (130), both ends of the third flow channel (130) are communicated with the second flow channel (120) and the first flow channel (110) respectively, a through hole is arranged on the burner brick (100), an orifice of the through hole is located in the cracking furnace hearth, and a hole channel of the through hole forms the second flow channel (120). An end of the through hole is a horn mouth, and a large-diameter end of the horn mouth faces the cracking furnace hearth.

2. The side wall gas burner for treating a return furnace coke oven gas according to claim 1, characterized by, The third flow channel (130) is a cuboid flow channel, and a long side of the third flow channel (130) is parallel to an axis of the second flow channel (120).

3. The side wall gas burner for treating a return furnace coke oven gas according to claim 2, characterized in that, The coke burning gas flow pipe assembly (200) further comprises a coke burning gas ejection pipe (220) which is arranged in the second flow channel (120) and communicated with the coke burning gas flow pipe (210), the coke burning gas ejection pipe (220) is provided with coke burning gas ejection holes (221), and the coke burning gas flow pipe (210) and the second flow channel (120) are communicated through the coke burning gas ejection holes (221).

4. The side wall gas burner for treating a return furnace coke oven gas according to claim 2, characterized by The number of the coke burning gas ejection holes (221) is multiple.

5. The side wall gas burner for treating a return shaft calcination gas according to any one of claims 2 to 4, characterized in that, Multiple coke burning gas ejection holes (221) are uniformly arranged along an axis of the coke burning gas ejection pipe (220).

6. The side wall gas burner for treating a return furnace coke oven gas according to claim 5, characterized in that Both ends of the coke burning gas ejection pipe (220) are provided with openings.

7. The side wall gas burner for treating a return furnace coke oven gas according to claim 6, characterized in that The number of the coke burning gas flow pipes (210) is multiple.

8. The side wall gas burner for treating a return furnace flue gas according to claim 5, wherein The coke burning gas flow pipe assembly (200) further comprises a coke burning gas inlet pipe (230), and the coke burning gas flow pipes (210) and the coke burning gas source are communicated through the coke burning gas inlet pipe (230).

9. The side wall gas burner for treating a return shaft calcination gas according to any one of claims 1 to 4, characterized in that, ​ 10. The side wall gas burner for treating a return furnace coke oven gas according to any one of claims 1 to 4, characterized in that, ​

Images