CN115654481A - Low NO in cracking furnace x Burner and method for treating char gas - Google Patents
Low NO in cracking furnace x Burner and method for treating char gas Download PDFInfo
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- CN115654481A CN115654481A CN202211203940.1A CN202211203940A CN115654481A CN 115654481 A CN115654481 A CN 115654481A CN 202211203940 A CN202211203940 A CN 202211203940A CN 115654481 A CN115654481 A CN 115654481A
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Abstract
The invention belongs to the technical field of chemical energy environmental protection, and discloses a low NO in a cracking furnace X The burner comprises a burner block, a burnt gas inlet pipe and a fuel inlet pipe, wherein the burner block is provided with a gas flow channel communicated with a hearth of the cracking furnace, the burner block is fixed on a furnace body of the cracking furnace, combustion-supporting gas enters the hearth through the gas flow channel, two ends of the burnt gas inlet pipe are respectively communicated with a burnt gas source and the gas flow channel, and two ends of the fuel inlet pipe are respectively communicated with a fuel gas source and the hearth. The burning gas, the combustion-supporting gas and the fuel gas are mixed and burned in the hearth, so that combustible particles in the burning gas are burned, and the effect of reducing the particles in the burning gas is achievedAnd (5) fruit.
Description
Technical Field
The invention relates to a chemical energy environment-friendly technologyThe technical field, in particular to a cracking furnace with low NO X A burner and a method for treating a char gas.
Background
The cracking furnace is a core device for producing ethylene, in actual work, coking can occur in a furnace tube of the cracking furnace to form coke scale along with the increase of the operation working time of the cracking furnace, if the coke scale is not processed in time, the energy consumption and the raw material consumption of the cracking furnace can be increased, the service life of the cracking furnace and the operation cycle of the cracking furnace are shortened, and therefore, the coke is required to be burnt.
In the process, the cracking furnace generates a large amount of coke-burning gas which mainly comprises pollutants such as steam, particulate matters (coke powder, rust and the like) and CO2, if the coke-burning gas is directly discharged into the atmosphere, the environment is not very favorable, and the coke-burning gas (about 100-400 ℃) contains a large amount of waste heat, and if the coke-burning gas is directly discharged into the atmosphere, the waste heat cannot be utilized.
In the prior art, the coke-burning gas is generally introduced into a coke-burning tank, particles in the coke-burning gas are separated in the coke-burning tank, and then the coke-burning gas is discharged into the atmosphere or introduced into a hearth of a cracking furnace, so that the treatment of the particles in the coke-burning gas and the utilization of waste heat are realized.
However, the coke-burning tank often cannot completely separate out the particulate matters in the coke-burning gas, some particulate matters still remain incompletely combusted in the hearth of the cracking furnace, the problem of environmental pollution still exists when the residual particulate matters are discharged into the atmosphere from the hearth of the cracking furnace, and the problem of ash accumulation in the hearth of the cracking furnace is easily caused by the residual particulate matters.
Therefore, how to reduce the particulate matters in the coke-burning gas is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
It is an object of the present invention to provide a low NO in cracking furnaces X The combustor can burn combustible particles in the burnt gas, and then the effect of reducing the particles in the burnt gas is achieved.
In order to achieve the purpose, the invention adopts the following technical scheme:
low NO in cracking furnace X The burner and the cracking furnace comprise a furnace body, the furnace body is provided with a hearth, and low NO is contained in the cracking furnace X The burner includes:
the burner block can be fixed on the furnace body, the burner block is provided with a gas flow channel, the gas flow channel can be communicated with the hearth, and combustion-supporting gas can enter the hearth through the gas flow channel;
one end of the coke-burning gas inlet pipe is communicated with a coke-burning gas source, and the other end of the coke-burning gas inlet pipe is communicated with the gas flow passage;
the one end of fuel intake pipe is used for with fuel gas source intercommunication, the other end of fuel intake pipe can communicate with furnace.
Optionally, the other end of the coke-burning gas inlet pipe is provided with a coke-burning gas spray head.
Optionally, the gas flow channel has an inlet end through which combustion-supporting gas enters the gas flow channel and an outlet end between which the char-combusting gas nozzle is disposed in the furnace.
Optionally, the other end of the fuel inlet pipe is provided with a fuel nozzle, and the fuel nozzle is positioned in the hearth.
Alternatively, the number of the fuel injectors is plural, and fuel gas injected from the plural fuel injectors is combusted to form combustion flames.
Optionally, a plurality of fuel nozzles are arranged around the coke-burning gas nozzle, and the coke-burning gas sprayed by the coke-burning gas nozzle can enter a high-temperature combustion area of the combustion flame.
Optionally, the burner further comprises a wind box, the wind box is communicated with the gas flow channel, and the wind box is used for introducing combustion-supporting gas into the gas flow channel.
Optionally, the coke-burning gas inlet pipe penetrates through the windbox.
Another object of the present invention is to provide a method for treating a coke-burning gas, which can burn combustible particles in the coke-burning gas, thereby achieving the effect of reducing the combustible particles in the coke-burning gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for treating the burnt gas comprises the steps of burning combustible particles in the burnt gas in a hearth of a cracking furnace by using a burner, and discharging the burnt gas out of the hearth along with flue gas of the cracking furnace.
Optionally, the char gas is introduced into a high temperature combustion zone of the burner combustion flame.
Has the advantages that:
the invention provides a cracking furnace with low NO X The combustor, including can fixing the burner block on the pyrolysis furnace body, set up the gas flow way on the burner block, combustion-supporting gas can get into the furnace of pyrolysis furnace through the gas flow way, the one end and the burnt gas source intercommunication of burnt gas intake pipe, the other end and the gas flow way intercommunication of burnt gas intake pipe, make burnt gas can loop through burnt gas intake pipe and the furnace that the gas flow way got into the pyrolysis furnace, in the gas flow way, combustion-supporting gas and burnt gas mix, in the furnace of pyrolysis furnace, the combustion-supporting gas that mixes to have burnt gas mixes and burns with fuel gas, make the combustible particle thing burning in the burnt gas, and then reached the effect that reduces combustible particle thing in the burnt gas.
According to the method for treating the coke-burning gas, the burner is used for burning combustible particles in the coke-burning gas in the hearth of the cracking furnace, so that the effect of reducing the combustible particles in the coke-burning gas is achieved, and the coke-burning gas is discharged out of the hearth along with flue gas of the cracking furnace, so that the method is beneficial to environmental protection.
Drawings
FIG. 1 is a first schematic structural diagram of a burner provided by the present invention;
fig. 2 is a schematic structural diagram of a burner provided by the present invention.
In the figure:
100. a furnace body; 110. a hearth; 200. a burner block; 210. a gas flow channel; 211. an air inlet end; 212. an air outlet end; 300. a coke-burning gas inlet pipe; 310. a scorching gas nozzle; 400. a fuel intake pipe; 410. a fuel injector; 500. an air box; 600. an air regulator.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means 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 with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
This example provides a cracking furnaceMedium to low NO X The combustor can combust combustible particles in the coke-burning gas, so that the effect of reducing the particles in the coke-burning gas is achieved, and NO of the combustor can be reduced X The discharge of (2) is beneficial to environmental protection.
Specifically, as shown in fig. 1 and 2, the cracking furnace includes a furnace body 100, the furnace body 100 is provided with a hearth 110, and a low NO in the cracking furnace X The combustor includes burner block 200, burnt gas intake pipe 300 and fuel intake pipe 400, burner block 200 can be fixed in on furnace body 100, burner block 200 is equipped with gas flow channel 210, gas flow channel 210 can communicate with furnace 110, combustion-supporting gas can get into furnace 110 through gas flow channel 210, the one end of burning burnt gas intake pipe 300 is used for and burns burnt gas source intercommunication, the other end and the gas flow channel 210 intercommunication of burning burnt gas intake pipe 300, the one end of fuel intake pipe 400 is used for and fuel gas source intercommunication, the other end of fuel intake pipe 400 can communicate with furnace 110.
A low NO in the cracking furnace X The combustor is provided with the burnt gas intake pipe 300 with burnt gas source intercommunication, and set up the gas flow channel 210 that can let in combustion-supporting gas to furnace 110 on burner block 200, make the one end and the burnt gas source intercommunication of burnt gas intake pipe 300, the other end and the gas flow channel 210 intercommunication of burnt gas intake pipe 300, in gas flow channel 210, combustion-supporting gas and burnt gas mix, in furnace 110, combustion-supporting gas and fuel gas mix and burn, make the combustible particle thing burning in the burnt gas, and then reached the effect that reduces combustible particle thing in the burnt gas. Meanwhile, the hearth 110 for introducing the burnt gas into the cracking furnace also achieves the effect of recycling the waste heat of the burnt gas, thereby realizing the full utilization of energy. It should be noted that the coke-burning gas source may be a coke-burning tank, that is, a furnace tube of the cracking furnace is communicated with the coke-burning tank, and the coke-burning tank is communicated with the coke-burning gas inlet tube 300; the coke-burning gas source can be other coke-burning gas processing units.
Alternatively, as shown in fig. 1 and fig. 2, the other end of the coke-burning gas inlet pipe 300 is provided with a coke-burning gas nozzle 310, and the coke-burning gas is injected into the gas flow passage 210 through the coke-burning gas nozzle 310, so that combustible particulate matters in the coke-burning gas can enter the gas flow passage 210 relatively dispersedly.
Further, as shown in fig. 1 and fig. 2, the gas flow channel 210 has an air inlet end 211 and an air outlet end 212, the combustion-supporting gas enters the gas flow channel 210 through the air inlet end 211, the char-combusting gas nozzle 310 is disposed at the air inlet end 211 or between the air inlet end 211 and the air outlet end 212, and the air outlet end 212 is disposed in the furnace chamber 110, so as to prolong a flow tube pass of the char-combusting gas in the gas flow channel 210, improve the mixing uniformity of the char-combusting gas and the combustion-supporting gas in the gas flow channel 210, further enable combustible particulate matters in the char-combusting gas entering the furnace chamber 110 to be more uniformly and sufficiently combusted, improve the ability of the combustor to treat the combustible particulate matters in the char-combusting gas, and achieve the effect of further reducing the combustible particulate matters in the char-combusting gas. Of course, in other embodiments, the coke-burning gas nozzle 310 may be disposed at the gas outlet end 212 according to actual use conditions.
Alternatively, as shown in fig. 1 and 2, the other end of the fuel inlet pipe 400 is provided with a fuel injector 410, the fuel injector 410 is located in the furnace 110, and the fuel gas is injected into the furnace 110 through the fuel injector 410.
Further, as shown in fig. 1 and 2, the number of the fuel injectors 410 is plural, and fuel gas injected from the plural fuel injectors 410 is combusted to form combustion flames.
Preferably, as shown in fig. 1 and fig. 2, a plurality of fuel nozzle 410 encircle burnt gas shower nozzle 310 and set up, make the burnt gas that is located a plurality of fuel nozzle 410 by burnt gas shower nozzle 310 spun, and the injection direction of fuel nozzle 410 and the injection direction phase-match of burnt gas shower nozzle 310, and then can get into burning flame's high temperature combustion zone by burnt gas shower nozzle 310 spun burnt gas, be favorable to burning the abundant burning of combustible particle thing in the gas, and also be favorable to cooling high temperature combustion zone, and then reach the effect that reduces combustor nitrogen oxide emission, be favorable to the environmental protection. It should be noted that, the above-mentioned matching between the injection direction of the fuel nozzle 410 and the injection direction of the coke-burning gas nozzle 310 means that the injection direction of the fuel nozzle 410 and the injection direction of the coke-burning gas nozzle 310 are arranged at an acute angle, so that the coke-burning gas sprayed from the coke-burning gas nozzle 310 can be sprayed into a high-temperature combustion area of a combustion flame, and the specific angle between the injection direction of the fuel nozzle 410 and the injection direction of the coke-burning gas nozzle 310 can be determined by Computational Fluid Dynamics (CFD) simulation. In addition, in the present embodiment, the injection direction of the coke-burning gas injector 310 is parallel to the axis of the gas channel 210, and in other embodiments, if the injection direction of the coke-burning gas injector 310 is not parallel to the axis of the gas channel 210, the coke-burning gas injector 310 may be disposed at the gas outlet end 212 of the gas channel 210.
Further, as shown in fig. 1 and 2, the number of the coke-burning gas nozzles 310 is multiple, so as to increase the introduction amount of the coke-burning gas in the high-temperature combustion zone, improve the efficiency of treating combustible particulate matters in the coke-burning gas, and further reduce the temperature of the high-temperature combustion zone, thereby further reducing the emission amount of nitrogen oxides of the combustor.
Optionally, as shown in fig. 1 and fig. 2, the burner further includes a windbox 500, the windbox 500 is communicated with the gas flow channel 210, the windbox 500 is used for introducing combustion-supporting gas into the gas flow channel 210, further, the burner further includes an air regulator 600, the air regulator 600 is communicated with the windbox 500, and the air regulator 600 is used for introducing combustion-supporting gas into the windbox 500.
Optionally, as shown in fig. 1 and fig. 2, the coke-burning gas inlet pipe 300 penetrates through the wind box 500, so that the overall occupied space of the burner is reduced, the operation of penetrating the coke-burning gas inlet pipe 300 through the burner block 200 is omitted, the production process of the burner is simplified, and the production efficiency of the burner is improved.
It should be noted that the arrangement and injection direction of the fuel injector 410, the arrangement and injection direction of the char-combusting gas injector 310, and the design of the gas flow passages 210 described above may be determined by Computational Fluid Dynamics (CFD) simulations.
The embodiment also provides a method for treating the burnt gas, which can burn combustible particles in the burnt gas, and further achieve the effect of reducing the particles in the burnt gas.
Specifically, the method for treating the burnt gas comprises the following steps: combustible particles in the coke-burning gas are burned in a hearth of the cracking furnace by the burner, and then the coke-burning gas is discharged out of the hearth along with flue gas of the cracking furnace, so that the effect of reducing the combustible particles in the coke-burning gas is achieved, and the environment is protected. And areAnd moreover, the burnt gas is burnt in the hearth of the cracking furnace, so that the cracking furnace can recycle the waste heat carried by the burnt gas, and the energy utilization rate is improved. It is understood that since the burner provided in this embodiment is provided with the coke-burning gas inlet pipe 300, the above-described treatment method preferably employs the pyrolysis furnace provided in this embodiment with a low NO content X A burner.
Preferably, the high-temperature combustion area of the burner for burning flame is filled with the coke-burning gas, the high-temperature combustion area is favorable for fully burning combustible particles in the coke-burning gas, so that the treatment efficiency of the combustible particles in the coke-burning gas is improved, moreover, the temperature of the coke-burning gas is usually 100-400 ℃, the temperature of the high-temperature combustion area of the burner is far higher than that of the coke-burning gas, the coke-burning gas is filled into the high-temperature combustion area of the burner, the high-temperature combustion area is favorable for cooling, and the effect of reducing the emission of nitrogen oxides of the burner can be achieved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. Low NO in cracking furnace X Burner, the pyrolysis furnace includes furnace body (100), furnace body (100) is equipped with furnace (110), characterized in that, a low NO in the pyrolysis furnace X The burner includes:
the burner block (200) can be fixed on the furnace body (100), the burner block (200) is provided with a gas flow channel (210), the gas flow channel (210) can be communicated with the hearth (110), and combustion-supporting gas can enter the hearth (110) through the gas flow channel (210);
a coke-burning gas inlet pipe (300), wherein one end of the coke-burning gas inlet pipe (300) is communicated with a coke-burning gas source, and the other end of the coke-burning gas inlet pipe (300) is communicated with the gas flow passage (210);
the furnace comprises a fuel inlet pipe (400), one end of the fuel inlet pipe (400) is used for being communicated with a fuel gas source, and the other end of the fuel inlet pipe (400) can be communicated with the furnace chamber (110).
2. The pyrolysis furnace of claim 1 with a low NO content X The burner is characterized in that the other end of the coke-burning gas inlet pipe (300) is provided with a coke-burning gas nozzle (310).
3. A low NO in the cracking furnace according to claim 2 X The burner is characterized in that the gas flow channel (210) is provided with an air inlet end (211) and an air outlet end (212), the combustion-supporting gas enters the gas flow channel (210) through the air inlet end (211), the coke-burning gas nozzle (310) is arranged at the air inlet end (211) or between the air inlet end (211) and the air outlet end (212), and the air outlet end (212) is arranged in the hearth (110).
4. The cracking furnace of claim 3, wherein the content of NO in the cracking furnace is low X The burner is characterized in that the other end of the fuel inlet pipe (400) is provided with a fuel nozzle (410), and the fuel nozzle (410) is positioned in the hearth (110).
5. A low NO in the cracking furnace according to claim 4 X The burner is characterized in that the number of the fuel nozzles (410) is multiple, and fuel gas sprayed by the fuel nozzles (410) is combusted to form combustion flame.
6. A low NO in the cracking furnace according to claim 5 X The burner is characterized in that a plurality of fuel nozzles (410) are arranged around the coke-burning gas nozzle (310), and the coke-burning gas sprayed by the coke-burning gas nozzle (310) can enter a high-temperature combustion area of the combustion flame.
7. A low NO in the cracking furnace according to any one of claims 1 to 6 X The burner is characterized by further comprising a wind box (500), wherein the wind box (500) is communicated with the gas flow channel (210), and the wind box (500) is used for introducing the combustion-supporting gas into the gas flow channel (210).
8. A low NO in cracking furnace according to claim 7 X The burner is characterized in that the coke-burning gas inlet pipe (300) penetrates through the air box (500).
9. The method for treating the burnt gas is characterized in that combustible particles in the burnt gas are burnt in a hearth of a cracking furnace by a burner, and then the burnt gas is discharged out of the hearth along with flue gas of the cracking furnace.
10. The method for treating the coke-burning gas as claimed in claim 9, wherein the coke-burning gas is introduced into a high-temperature combustion zone of the burner combustion flame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211203940.1A CN115654481A (en) | 2022-09-29 | 2022-09-29 | Low NO in cracking furnace x Burner and method for treating char gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211203940.1A CN115654481A (en) | 2022-09-29 | 2022-09-29 | Low NO in cracking furnace x Burner and method for treating char gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115654481A true CN115654481A (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211203940.1A Pending CN115654481A (en) | 2022-09-29 | 2022-09-29 | Low NO in cracking furnace x Burner and method for treating char gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115654481A (en) |
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2022
- 2022-09-29 CN CN202211203940.1A patent/CN115654481A/en active Pending
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