Process burner, reaction furnace and method for processing gaseous fuel by process burner

Abstract

The invention discloses a process burner, a reaction furnace and a method for treating gaseous fuel through the process burner, and belongs to the technical field of chemical equipment. The process burner comprises a first spray pipe, a second spray pipe, a third spray pipe and a fourth spray pipe, the second nozzle and the outer wall of the first nozzle form a second channel; the third nozzle and the outer wall of the second nozzle form a third channel; the fourth nozzle and the outer wall of the third nozzle form a fourth channel; at least one of the second channel, the third channel and the fourth channel and the first channel are used for introducing first fuel; and at least one of the second channel, the third channel and the fourth channel is used for introducing second fuel. According to the designed process burner, a plurality of channels are constructed, the ignition preheating function and the process feeding function are integrated, in the gaseous fuel partial oxidation process, the ignition preheating function and the process feeding process can be achieved through one burner, and the tedious operation of replacing different burners is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of chemical equipment, and specifically relates to a process burner, a reaction furnace, and a method for treating gaseous fuel with a process burner. Background Art

[0002] Gaseous fuel is a very important basic energy source and chemical raw material in chemical production. The partial oxidation process of gaseous fuel is to continuously and stably transport these gaseous fuels and oxidants into the reactor through the process burner, so that they are effectively mixed in a reasonable flow field and undergo partial oxidation reaction, which can be converted into synthesis gas and then used in the preparation of various chemicals, blast furnace metallurgy, industrial and urban gas and other fields.

[0003] In the gaseous fuel partial oxidation process currently used, the burner operation process is cumbersome, which in turn affects the operating cost and safety of the reactor operation. Summary of the invention

[0004] In view of the above problems, the present application provides a process burner, a reaction furnace and a method for treating gaseous fuel with a process burner, which solves the technical problem of complicated operating procedures in the partial oxidation process of gaseous fuel.

[0005] An embodiment of the present application provides a process burner, which includes: a first nozzle having a first channel; a second nozzle, which is sleeved on the outer periphery of the first nozzle and forms a second channel with the outer wall of the first nozzle; a third nozzle, which is sleeved on the outer periphery of the second nozzle and forms a third channel with the outer wall of the second nozzle; a fourth nozzle, which is sleeved on the outer periphery of the third nozzle and forms a fourth channel with the outer wall of the third nozzle; an ignition device, which is arranged in the first channel; at least one of the second channel, the third channel, and the fourth channel and the first channel are used to introduce a first fuel; at least one of the second channel, the third channel, and the fourth channel is used to introduce a second fuel.

[0006] In some embodiments, the process burner further includes: a fifth nozzle, which is sleeved between the third nozzle and the fourth nozzle, the fifth nozzle and the outer wall of the third nozzle form a fourth channel, and the fourth nozzle and the outer wall of the fifth nozzle form a fifth channel.

[0007] In some embodiments, the first nozzle includes a first connecting portion and a first bending portion connected to each other, the first connecting portion is extended along the axial direction of the first nozzle, the first bending portion shrinks toward the axial direction of the first nozzle, and the shrinkage angle of the first bending portion is α, satisfying 0°≤α≤15°; and / or,

[0008] The second nozzle comprises a second connecting portion and a second bending portion connected to each other, the second connecting portion is extended along the axial direction of the second nozzle, the second bending portion is contracted toward the axial direction of the second nozzle, and the contraction angle of the second bending portion is β, which satisfies β≥α, and 5°≤β≤24°; and / or,

[0009] The third nozzle comprises a third connecting portion and a third bending portion connected to each other, the third connecting portion is extended along the axial direction of the third nozzle, the third bending portion is contracted toward the axial direction of the third nozzle, and the contraction angle of the third bending portion is γ, which satisfies γ≥β and 10°≤γ≤30°; and / or,

[0010] The fourth nozzle includes a fourth connecting portion and a fourth bending portion which are connected to each other. The fourth connecting portion is extended along the axial direction of the fourth nozzle, and the fourth bending portion is contracted toward the axial direction of the fourth nozzle. The contraction angle of the fourth bending portion is δ, satisfying δ≥γ, and 20°≤δ≤45°.

[0011] In some embodiments, the first nozzle includes a first connecting portion and a first bending portion connected to each other, the first connecting portion is extended along the axial direction of the first nozzle, the first bending portion shrinks toward the axial direction of the first nozzle, and the shrinkage angle of the first bending portion is α, satisfying 0°≤α≤15°; and / or,

[0012] The second nozzle comprises a second connecting portion and a second bending portion connected to each other, the second connecting portion is extended along the axial direction of the second nozzle, the second bending portion is contracted toward the axial direction of the second nozzle, and the contraction angle of the second bending portion is β, which satisfies β≥α, and 5°≤β≤24°; and / or,

[0013] The third nozzle comprises a third connecting portion and a third bending portion connected to each other, the third connecting portion is extended along the axial direction of the third nozzle, the third bending portion is contracted toward the axial direction of the third nozzle, and the contraction angle of the third bending portion is γ, which satisfies γ≥β and 10°≤γ≤30°; and / or,

[0014] The fifth nozzle comprises a fifth connecting portion and a fifth bending portion connected to each other, the fifth connecting portion is extended along the axial direction of the fifth nozzle, the fifth bending portion shrinks toward the axial direction of the fifth nozzle, and the shrinkage angle of the fifth bending portion is ε, which satisfies ε≥γ and 20°≤ε≤45°; and / or,

[0015] The fourth nozzle includes a fourth connecting portion and a fourth bending portion which are connected to each other. The fourth connecting portion is extended along the axial direction of the fourth nozzle, and the fourth bending portion is contracted toward the axial direction of the fourth nozzle. The contraction angle of the fourth bending portion is δ, satisfying δ≥ε, and 30°≤δ≤60°.

[0016] In some embodiments, the radial lengths of various positions on the same axis of the inner wall of the first nozzle are equal everywhere.

[0017] In some embodiments, the process burner further comprises: a plurality of first positioning blocks, located in the second channel and spaced apart on a side of the first nozzle facing the second nozzle; and / or,

[0018] a plurality of second positioning blocks, located in the third channel and spaced apart on a side of the second nozzle facing the third nozzle; and / or,

[0019] a plurality of third positioning blocks, located in the fourth channel and spaced apart on a side of the third nozzle facing the fourth nozzle; and / or,

[0020] A plurality of fourth positioning blocks are located in the fifth channel and are arranged at intervals on a side of the fourth nozzle facing the fifth nozzle.

[0021] In some embodiments, the first positioning block includes a first swirl blade, which abuts against the inner wall of the second channel; the second positioning block includes a second swirl blade, which abuts against the inner wall of the third channel; the third positioning block includes a third swirl blade, which abuts against the inner wall of the fourth channel; the fourth positioning block includes a fourth swirl blade, which abuts against the inner wall of the fifth channel.

[0022] In some embodiments, at least one of the second passage, the third passage, and the fourth passage is used to introduce a second fuel or a second medium.

[0023] In some embodiments, at least one of the second passage, the third passage, and the fourth passage is used to pass the first fuel and the second medium.

[0024] In some embodiments, the first channel is used to pass the first medium and the fourth medium; the second channel is used to pass the first medium, at least one of the second medium and the third medium, and the fourth channel is used to pass the second medium; or, the second channel is used to pass the second medium; the fourth channel is used to pass the first medium, at least one of the second medium and the third medium; the third channel is used to pass the first medium, at least one of the second medium and the fourth medium;

[0025] In some embodiments, the first channel is used to pass the first medium and the fourth medium; the second channel is used to pass the first medium, at least one of the second medium and the third medium, and the fourth channel is used to pass the second medium; or, the second channel is used to pass the second medium, and the fourth channel is used to pass the first medium, at least one of the second medium and the third medium; the third channel is used to pass the first medium, at least one of the second medium and the fourth medium; the fifth channel is used to pass the first medium, at least one of the second medium and the fourth medium.

[0026] In some embodiments, the fourth nozzle has a cavity configured to allow a cooling medium to flow into the cavity.

[0027] In some embodiments, the process burner further includes: a flame detection device disposed in the first channel.

[0028] Correspondingly, the present application also provides a reaction furnace, including the process burner as in the above embodiment.

[0029] Accordingly, the present application also provides a method for treating gaseous fuel with a process burner, comprising:

[0030] In the first working mode, the first fuel and the first medium are introduced into the first channel, the first medium or the second medium is introduced into the second channel and the third channel, the second medium is introduced into the fourth channel, and ignition is performed; in the second working mode, the first fuel and the first medium are introduced into the first channel, the first medium is introduced into the second channel and the third channel, and the first fuel is introduced into the fourth channel; in the third working mode, the first medium is introduced into the first channel, the second channel and the third channel, and the first fuel is introduced into the fourth channel; in the fourth working mode, the fourth medium is introduced into the first channel, the third medium is introduced into the second channel, the fourth medium is introduced into the third channel, and the second fuel is introduced into the fourth channel.

[0031] The beneficial effect of the present application is that the present application provides a process burner, a reactor and a method for treating gaseous fuel with a process burner. The process burner in the present application includes a first nozzle, a second nozzle, a third nozzle, a fourth nozzle and an ignition device. The first nozzle has a first channel, and the ignition device is arranged in the first channel; the second nozzle is sleeved on the outer periphery of the first nozzle and forms a second channel with the outer wall of the first nozzle; the third nozzle is sleeved on the outer periphery of the second nozzle and forms a third channel with the outer wall of the second nozzle; the fourth nozzle is sleeved on the outer periphery of the third nozzle and forms a fourth channel with the outer wall of the third nozzle; wherein, at least one of the second channel, the third channel and the fourth channel and the first channel are used to introduce the first fuel; at least one of the second channel, the third channel and the fourth channel is used to introduce the second fuel. In the present application, a process burner is designed to integrate the ignition preheating and process feeding functions through multiple channels, so that in the partial oxidation process of gaseous fuel, the ignition preheating and process feeding processes can be realized through one burner, avoiding the cumbersome operation of replacing different burners. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A cross-sectional view of a process burner provided in an embodiment of the present application;

[0034] Figure 2 A cross-sectional view of another process burner provided in an embodiment of the present application;

[0035] Figure 3 A flow chart of a method for treating gaseous fuel with a process burner provided in an embodiment of the present application;

[0036] Figure 4 A flow chart of another method for treating gaseous fuel with a process burner provided in an embodiment of the present application;

[0037] Description of reference numerals:

[0038] 1-first nozzle, 2-second nozzle, 3-third nozzle, 4-fourth nozzle, 5-fifth nozzle, 6-ignition device, 7-flame detection device, 10-first channel, 11-first connecting part, 12-first bending part, 20-second channel, 21-first positioning block, 22-second connecting part, 23-second bending part, 30-third channel, 31-second positioning block, 32-third connecting part, 33-third bending part, 40-fourth channel, 41-third positioning block, 42-fourth connecting part, 43-fourth bending part, 50-fifth channel, 51-fourth positioning block, 52-fifth connecting part, 53-fifth bending part. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words such as "upper", "lower", "left", and "right" used generally refer to the upper, lower, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, and at least one refers to one, two, or more than two, unless otherwise clearly and specifically defined.

[0040] The present application provides a process burner, a reaction furnace, and a method for treating gaseous fuel with a process burner, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0041] Gaseous fuels rich in hydrocarbons such as CH4, C2H6, such as natural gas, coke oven gas, and refinery gas, are very important basic energy sources and chemical raw materials in chemical production. The partial oxidation process of gaseous fuels can convert these gaseous fuels and oxidants into synthesis gas mainly composed of CO and H2 by continuously and stably conveying them to the reactor through the process burner, so that they are effectively mixed and partially oxidized in a reasonable flow field, and then used in the preparation of various chemicals such as synthetic ammonia, methanol and liquid fuels, blast furnace metallurgy, and industrial and urban gas.

[0042] In the gaseous fuel partial oxidation process currently used, most of them use hot wall reactors with refractory bricks, which need to be equipped with two sets of burner systems: preheating burners and process burners. First, in the ignition preheating stage, the refractory bricks are preheated to a certain temperature using the preheating burner, and then the preheating burner is removed and replaced with a process burner. Then, in the process feeding stage, the refractory bricks are used to store heat to ignite the fuel and oxidant mixture fed into the process burner. However, this method has a cumbersome operation process, and some air will be drawn into the reactor during the process of replacing the burner. If the burner is not replaced in time, the temperature in the reactor may drop and the fuel cannot be ignited. At the same time, it is also very easy to cause certain safety risks due to improper operation of the burner replacement, which will have a significant impact on the operating cost and safety of the reactor.

[0043] In view of this, an embodiment of the present application provides a process burner, which integrates ignition preheating and process feeding functions through multiple channels, so that in the partial oxidation process of gaseous fuel, ignition preheating and process feeding processes can be achieved through one burner, avoiding the tedious operation of replacing different burners; and avoiding certain safety risks caused by improper operation during the burner replacement process.

[0044] See also Figure 1 , Figure 1 A cross-sectional view of a process burner provided in an embodiment of the present application. The embodiment of the present application provides a process burner, which includes: a first nozzle 1, having a first channel 10; a second nozzle 2, which is sleeved on the outer periphery of the first nozzle 1, and forms a second channel 20 with the outer wall of the first nozzle 1; a third nozzle 3, which is sleeved on the outer periphery of the second nozzle 2, and forms a third channel 30 with the outer wall of the second nozzle 2; a fourth nozzle 4, which is sleeved on the outer periphery of the third nozzle 3, and forms a fourth channel 40 with the outer wall of the third nozzle 3; an ignition device 6, which is arranged in the first channel 10; at least one of the second channel 20, the third channel 30, and the fourth channel 40 and the first channel 10 are used to pass the first fuel; at least one of the second channel 20, the third channel 30, and the fourth channel 40 is used to pass the second fuel.

[0045] In the present application, the ignition device 6 is arranged in the first channel 10, and one end of the ignition device 6 facing the outlet of the first channel 10 is used to ignite in the direction of the outlet. The first fuel is introduced into at least one of the second channel 20, the third channel 30, and the fourth channel 40 and the first channel 10, and the second fuel is introduced into at least one of the second channel 20, the third channel 30, and the fourth channel 40; wherein the nozzle is the nozzle of the burner, which is a key component for the combustion equipment, and its function is to spray the medium into the combustion chamber to realize the combustion process; each nozzle has a through hole running through both ends, and then each nozzle is sequentially sleeved through the through hole to form the first channel 10, the second channel 20, the third channel 30, and the fourth channel 40; wherein the first channel 10, the second channel 20, the third channel 30, and the fourth channel 40 include an inlet and an outlet, the inlet is used to introduce the medium, and the outlet is used to output the corresponding medium based on the medium introduced by the inlet; it should be noted that the fuel is a kind of medium, wherein the first fuel is the fuel corresponding to the ignition preheating stage, and the second fuel is the fuel corresponding to the process feeding stage.

[0046] Through the above technical solution, an ignition device 6 is provided in the first channel 10, and the first channel 10, the second channel 20, the third channel 30, and the fourth channel 40 are constructed based on each nozzle, so that the present application can meet the requirements of the introduction of the first fuel and the introduction of the second fuel through one burner, and can be ignited through the ignition device 6, thereby integrating the ignition preheating and the process feeding, making the gaseous fuel partial oxidation process more convenient; on the one hand, it avoids the cumbersome operation of replacing different burners, and on the other hand, it avoids the temperature drop in the reactor caused by improper operation of replacing the burner. and gas leakage and other safety risks; in addition, at least one of the second channel 20, the third channel 30, and the fourth channel 40 and the first channel 10 are used to introduce the first fuel, and the first fuel is introduced through at least two channels, so that the total flow of the first fuel is increased, so that the ignition preheating stage can shorten the preheating time of the ignition preheating stage under the condition that the temperature rise rate allows, and at least one of the second channel 20, the third channel 30, and the fourth channel 40 is used to introduce the second fuel, which speeds up the rate of the process feeding stage, thereby speeding up the work efficiency of the gaseous fuel partial oxidation process operation. In addition, it should be noted that the ignition preheating stage is to increase the temperature to the preset temperature required for the process feeding stage, but the flow of each channel has an upper limit. Under the condition of flow restriction, the temperature increase of the first fuel in the ignition preheating stage will be limited, and may not reach the preset temperature required for the process feeding stage, thereby affecting the normal progress of the gaseous fuel partial oxidation process, and then the first fuel is introduced through at least two channels to increase the flow of the first fuel, which can further ensure the normal operation of the gaseous fuel partial oxidation process.

[0047] In some embodiments, at least one of the second passage 20 , the third passage 30 , and the fourth passage 40 is used to pass the first fuel and the second medium.

[0048] That is to say, the channels in the second channel 20, the third channel 30, and the fourth channel 40 used for introducing the first fuel are also used for introducing the second medium; illustratively, if the second channel 20 is used for introducing the first fuel, then the second channel 20 is also used for introducing the second medium; if the second channel 20 and the third channel 30 are both used for introducing the first fuel, then the second channel 20 and the third channel 30 are also used for introducing the second medium; wherein, in different operating modes, the second medium or the first fuel is introduced into at least one of the second channel 20, the third channel 30, and the fourth channel 40.

[0049] Through the above technical solution, the channels in the second channel 20, the third channel 30 and the fourth channel 40 used for introducing the first fuel are also used for introducing the second medium. On the one hand, the channels in the second channel 20, the third channel 30 and the fourth channel 40 used for introducing the first fuel are prevented from flashing back due to the medium containing oxygen components in the channels during the process of switching to introduce the first fuel. On the other hand, the high-temperature flue gas generated by the reaction when the first fuel is not introduced during the ignition preheating stage is prevented from entering the channels and affecting the use of the burner.

[0050] In some embodiments, at least one of the second channel 20, the third channel 30, and the fourth channel 40 is used to pass the second fuel or the second medium. That is, the channel used to pass the second fuel among the second channel 20, the third channel 30, and the fourth channel 40 is also used to pass the second medium; illustratively, if the second channel 20 is used to pass the second fuel, then the second channel 20 is also used to pass the second medium; if the second channel 20 and the third channel 30 are both used to pass the second fuel, then the second channel 20 and the third channel 30 are also used to pass the second medium; wherein, in different working modes, the second medium or the second fuel passes into at least one of the second channel 20, the third channel 30, and the fourth channel 40.

[0051] Through the above technical solution, the channels in the second channel 20, the third channel 30 and the fourth channel 40 used for introducing the second fuel are also used for introducing the second medium. On the one hand, the channels in the second channel 20, the third channel 30 and the fourth channel 40 used for introducing the second fuel can avoid tempering of the channels due to the medium containing oxygen components in the channels during the process of switching to introduce the second fuel. On the other hand, it can avoid the synthesis gas generated by the reaction when the second fuel is not introduced in the process feeding stage from entering the channels and affecting the use of the burner.

[0052] In some embodiments, at least one of the second passage 20 , the third passage 30 , and the fourth passage 40 is used to pass the first fuel, the second fuel, and the second medium.

[0053] That is to say, the channels in the second channel 20, the third channel 30, and the fourth channel 40 used for introducing the first fuel are also used for introducing the second medium and the second fuel; illustratively, if the second channel 20 is used for introducing the first fuel, then the second channel 20 is also used for introducing the second medium and the second fuel; if the second channel 20 and the third channel 30 are both used for introducing the first fuel, then the second channel 20 and the third channel 30 can also be used for introducing the second medium and the second fuel; wherein, in different operating modes, the second medium or the first fuel or the second fuel is introduced into at least one of the second channel 20, the third channel 30, and the fourth channel 40.

[0054] It should be noted that the channels for introducing the first fuel in the second channel 20, the third channel 30, and the fourth channel 40 are not used for introducing other media except the first fuel and the second medium during the ignition preheating stage; the channels for introducing the second fuel are not used for introducing other media except the first fuel, the second fuel, and the second medium during the ignition preheating and process feeding stages.

[0055] Through the above technical solution, the first fuel, the second fuel, and the second medium are introduced into the same channel. On the one hand, it is possible to avoid the channel from being tempered due to the medium containing oxygen components in the channel during the switching process of introducing the first fuel or the second fuel, and on the other hand, it is possible to avoid the high-temperature flue gas or synthesis gas generated by the reaction when the first fuel or the second fuel is not introduced during the partial oxidation process of the gaseous fuel from entering the channel, thereby affecting the combustion process and the use of the burner. In addition, the occupation of the channel can be reduced, thereby reducing the complexity of the medium introduction pipeline, thereby reducing the complexity of the feeding mechanism of the partial oxidation process of the gaseous fuel; and, other channels can flexibly adjust the introduced medium based on demand, which is conducive to the optimization and efficiency improvement of the partial oxidation process of the gaseous fuel.

[0056] In some embodiments, the first channel 10 is used to pass the first medium and the fourth medium; the second channel 20 is used to pass the first medium, at least one of the second medium and the third medium, and the fourth channel 40 is used to pass the second medium; or, the second channel 20 is used to pass the second medium; the fourth channel 40 is used to pass the first medium, at least one of the second medium and the third medium; the third channel 30 is used to pass the first medium, at least one of the second medium and the fourth medium.

[0057] That is, in some embodiments, the first channel 10 is used to pass the first medium and the fourth medium; the second channel 20 is used to pass the first medium, at least one of the second medium and the third medium; the third channel 30 is used to pass the first medium, at least one of the second medium and the fourth medium; the fourth channel 40 is used to pass the second medium. In other words, the first channel 10 is used to pass the first medium and the fourth medium; the second channel 20 is used to pass the first medium and the third medium, or the second channel 20 is used to pass the second medium and the third medium, or the second channel 20 is used to pass the first medium, the second medium and the third medium; the third channel 30 is used to pass the first medium and the fourth medium, or the third channel 30 is used to pass the second medium and the fourth medium, or the third channel 30 is used to pass the first medium, the second medium and the fourth medium; the fourth channel 40 is used to pass the second medium.

[0058] In some embodiments, the first channel 10 is used to pass the first medium and the fourth medium; the second channel 20 is used to pass the second medium; the third channel 30 is used to pass at least one of the first medium and the second medium and the fourth medium; the fourth channel 40 is used to pass at least one of the first medium and the second medium and the third medium. That is to say, the first channel 10 is used to pass the first medium and the fourth medium; the second channel 20 is used to pass the second medium; the third channel 30 is used to pass the first medium and the fourth medium, or the third channel 30 is used to pass the second medium and the fourth medium, or the third channel 30 is used to pass the first medium, the second medium and the fourth medium; the fourth channel 40 is used to pass the first medium and the third medium, or the fourth channel 40 is used to pass the second medium and the third medium, or the fourth channel 40 is used to pass the first medium, the second medium and the third medium.

[0059] It should be noted that the first fuel is introduced into the first channel 10 and the channel into which no other medium is introduced except the second medium during the ignition preheating stage; the second fuel is introduced into the channel into which no other medium is introduced except the first fuel and the second medium during the ignition preheating and process feeding stage; the various channels of the process burner in this application can be adjusted for medium introduction according to actual conditions, and are not limited to the scheme for introducing medium mentioned in this application. Moreover, in different working modes, each channel inputs medium to prevent the high-temperature flue gas or synthesis gas generated by the reaction from entering the channel and thus affecting the combustion process and the use of the burner.

[0060] In the embodiment of the present application, the first fuel can be one or more gaseous fuels such as natural gas, purge gas, coke oven gas, pyrolysis gas, refinery gas, etc. as ignition fuel; the second fuel can be one or more gaseous fuels such as natural gas, purge gas, coke oven gas, pyrolysis gas, refinery gas, etc. as process fuel; the first medium can be air as an oxidant; the second medium can be one or more non-combustion-supporting gases such as N2, CO2 or water vapor as protective gas; the third medium can be one or more oxygen, air or other oxygen-rich gases as the main oxidant; the fourth medium can be one or more non-combustion-supporting gases such as CO2 or water vapor as the secondary oxidant. The process fuel component used in the process feeding stage, i.e., the second fuel, can be the same as the ignition fuel in the ignition preheating stage, i.e., the first fuel, or it can be different.

[0061] In some embodiments, the first fuel and the second fuel are introduced into the second channel 20 or the fourth channel 40; when the first fuel and the second fuel are introduced into the second channel 20, the first channel 10 is used to introduce the first medium, the fourth medium, and the first fuel; the second channel 20 is used to introduce the second medium, the first fuel, and the second fuel; the third channel 30 is used to introduce at least one of the first medium and the second medium and the fourth medium; the fourth channel 40 is used to introduce at least one of the first medium and the second medium and the third medium. When the first fuel and the second fuel are introduced into the fourth channel 40, the first channel 10 is used to introduce the first medium, the fourth medium, and the first fuel; the second channel 20 is used to introduce at least one of the first medium and the second medium and the third medium; the third channel 30 is used to introduce at least one of the first medium and the second medium and the fourth medium; the fourth channel 40 is used to introduce the second medium, the first fuel, and the second fuel.

[0062] Through the above technical scheme, based on different working modes, the first channel 10, the second channel 20, the third channel 30, and the fourth channel 40 in the process burner designed in the present application, under different working modes, the corresponding medium is introduced into the channel based on the preset scheme of introducing the medium, so that one process burner can realize the ignition preheating and process feeding process, and the multi-channel design can flexibly switch the feeding mechanism based on demand, thereby improving the flexibility of the process to adapt to different needs; wherein, the first fuel and the first medium are introduced into the first channel, and then the first fuel can be ignited by the igniter arranged in the first channel to achieve the effect of ignition preheating; in addition, the fourth medium is isolated between the third medium and the second fuel, so that the second fuel and the third medium will not immediately undergo a combustion reaction at the burner port, thereby avoiding damage to the burner; further, the second medium is introduced into the same channel as the first fuel and the second fuel, thereby reducing the occupancy of the channel and simplifying the structure, so that other channels can flexibly adjust the introduced medium based on demand, which is conducive to the optimization and efficiency improvement of the partial oxidation process of the gaseous fuel.

[0063] In some embodiments, the first nozzle 1 includes a first connecting portion 11 and a first bending portion 12 connected to each other. The first connecting portion 11 is extended along the axial direction of the first nozzle 1, and the first bending portion 12 is contracted toward the axial direction of the first nozzle 1. The contraction angle of the first bending portion 12 is α, which satisfies 0°≤α≤15°, that is, the contraction angle α of the first bending portion 12 can be any angle of 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, or a range value between any two angles. In the ignition preheating stage, the flow rate of the gas in the first channel 10 when it flows out of the first channel 10 is 10-150m / s; in the process feeding stage, the flow rate of the gas in the first channel 10 when it flows out of the first channel 10 is 5-60m / s; the specific settings can be adjusted according to actual conditions, and this application does not limit this.

[0064] In some embodiments, the second nozzle 2 includes a second connecting portion 22 and a second bending portion 23 connected to each other. The second connecting portion 22 is extended along the axial direction of the second nozzle 2, and the second bending portion 23 is contracted toward the axial direction of the second nozzle 2. The contraction angle of the second bending portion 23 is β, satisfying β≥α, and 5°≤β≤24°, that is, the contraction angle β of the second bending portion 23 can be any angle of 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, or a range value between any two angles. During the ignition preheating stage, the flow rate of the gas in the second channel 20 when flowing out of the second channel 20 is 10-150m / s; during the process feeding stage, the flow rate of the gas in the second channel 20 when flowing out of the second channel 20 is 30-150m / s; the specific settings can be adjusted according to actual conditions, and this application does not impose any restrictions on this.

[0065] In some embodiments, the third nozzle 3 includes a third connecting portion 32 and a third bending portion 33 connected to each other. The third connecting portion 32 is extended along the axial direction of the third nozzle 3, and the third bending portion 33 is contracted toward the axial direction of the third nozzle 3. The contraction angle of the third bending portion 33 is γ, satisfying γ≥β, and 10°≤γ≤30°, that is, the contraction angle γ of the third bending portion 33 can be any angle of 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, or a range value between any two angles. During the ignition preheating stage, the flow rate of the gas in the third channel 30 when flowing out of the third channel 30 is 1-75m / s. During the process feeding stage, the flow rate of the gas in the third channel 30 when flowing out of the third channel 30 is 20-150m / s. The specific settings can be adjusted according to actual conditions, and this application does not impose any restrictions on this.

[0066] In some embodiments, the fourth nozzle 4 includes a fourth connecting portion 42 and a fourth bending portion 43 connected to each other. The fourth connecting portion 42 is extended along the axial direction of the fourth nozzle 4, and the fourth bending portion 43 is contracted toward the axial direction of the fourth nozzle 4. The contraction angle of the fourth bending portion 43 is δ, satisfying δ≥γ, and 20°≤δ≤45°, that is, the contraction angle δ of the fourth bending portion 43 can be any angle of 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, or a range value between any two angles. In the ignition preheating stage, the flow rate of the gas in the fourth channel 40 when it flows out of the fourth channel 40 is 1-75m / s; in the process feeding stage, the flow rate of the gas in the fourth channel 40 when it flows out of the fourth channel 40 is 30-150m / s; the specific settings can be adjusted according to actual conditions, and this application does not limit this. In some embodiments, any two or any three or all of the first nozzle 1, the second nozzle 2, the third nozzle 3, and the fourth nozzle 4 of the process burner meet the above conditions.

[0067] Through the above technical solution, different media can be introduced into the same burner simultaneously or in different time periods through multi-channel design, realizing complex process control; each nozzle is composed of a connecting part and a bending part, and the bending part shrinks toward the axis of the nozzle, forming a specific shrinkage angle, which helps to control the flow rate and direction of the gas on the one hand, and helps to mix the gas on the other hand. Reasonable flow rate and nozzle design ensure the stability and reliability of the ignition preheating stage and the process feeding stage, and help the uniform mixing and rapid reaction of the gas, thereby improving the working efficiency of the partial oxidation process operation of the gaseous fuel.

[0068] In some embodiments, the process burner of the present application is suitable for a pressure of no more than 10 MPa. This makes the process burner of the present application have a wide range of application prospects in various high-pressure application scenarios. Figure 2 , Figure 2 A cross-sectional view of another process burner provided in an embodiment of the present application. In some embodiments, the process burner further includes: a fifth nozzle 5, which is sleeved between the third nozzle 3 and the fourth nozzle 4, the fifth nozzle 5 and the outer wall of the third nozzle 3 form a fourth channel 40, and the outer wall of the fourth nozzle 4 and the fifth nozzle 5 form a fifth channel 50.

[0069] In some embodiments, the fifth channel 50 is used to pass through at least one of the first medium and the second medium and the fourth medium. That is, the fifth channel 50 can pass through the first medium and the fourth medium; it is also possible that the fifth channel 50 can pass through the second medium and the fourth medium; it is also possible that the fifth channel 50 can pass through the first medium, the second medium and the fourth medium.

[0070] Through the above technical solution, one of the first medium, the second medium, and the fourth medium is introduced into the fifth channel 50 under different working modes, which, on the one hand, prevents the high-temperature flue gas generated by the reaction in the ignition preheating stage or the synthesis gas generated by the reaction in the process feeding stage from entering the channel and affecting the use of the burner. On the other hand, the third medium is isolated from the fourth nozzle by introducing the fourth medium in the process feeding stage, so as to avoid the combustible synthesis gas generated in the process feeding stage from burning near the fourth nozzle and prevent the damage of the fourth nozzle. Further, in the present application, based on different working modes, the first channel 10, the second channel 20, the third channel 30, the fourth channel 40, and the fifth channel 50 in the process burner of the present application, in different working modes, introduce the corresponding medium into the channel based on the preset scheme of introducing the medium, so that the ignition preheating and process feeding processes can be realized through one process burner, and the safety and stability of the process burner are improved.

[0071] In some embodiments, the first nozzle 1 includes a first connecting portion 11 and a first bending portion 12 connected to each other. The first connecting portion 11 is extended along the axial direction of the first nozzle 1, and the first bending portion 12 is contracted toward the axial direction of the first nozzle 1. The contraction angle of the first bending portion 12 is α, which satisfies 0°≤α≤15°, that is, the contraction angle α of the first bending portion 12 can be any angle of 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, or a range value between any two angles. In the ignition preheating stage, the flow rate of the gas in the first channel 10 when it flows out of the first channel 10 is 10-150m / s; in the process feeding stage, the flow rate of the gas in the first channel 10 when it flows out of the first channel 10 is 5-60m / s; the specific settings can be adjusted according to actual conditions, and this application does not limit this.

[0072] In some embodiments, the second nozzle 2 includes a second connecting portion 22 and a second bending portion 23 connected to each other. The second connecting portion 22 is extended along the axial direction of the second nozzle 2, and the second bending portion 23 is contracted toward the axial direction of the second nozzle 2. The contraction angle of the second bending portion 23 is β, satisfying β≥α, and 5°≤β≤24°, that is, the contraction angle β of the second bending portion 23 can be any angle of 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, or a range value between any two angles. During the ignition preheating stage, the flow rate of the gas in the second channel 20 when flowing out of the second channel 20 is 10-150m / s; during the process feeding stage, the flow rate of the gas in the second channel 20 when flowing out of the second channel 20 is 30-150m / s; the specific settings can be adjusted according to actual conditions, and this application does not impose any restrictions on this.

[0073] In some embodiments, the third nozzle 3 includes a third connecting portion 32 and a third bending portion 33 connected to each other. The third connecting portion 32 is extended along the axial direction of the third nozzle 3, and the third bending portion 33 is contracted toward the axial direction of the third nozzle 3. The contraction angle of the third bending portion 33 is γ, satisfying γ≥β, and 10°≤γ≤30°, that is, the contraction angle γ of the third bending portion 33 can be any angle of 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, or a range value between any two angles. During the ignition preheating stage, the flow rate of the gas in the third channel 30 when flowing out of the third channel 30 is 1-75m / s. During the process feeding stage, the flow rate of the gas in the third channel 30 when flowing out of the third channel 30 is 20-150m / s. The specific settings can be adjusted according to actual conditions, and this application does not impose any restrictions on this.

[0074] In some embodiments, the fifth nozzle 5 includes a fifth connecting portion 52 and a fifth bending portion 53 connected to each other. The fifth connecting portion 52 is extended along the axial direction of the fifth nozzle 5, and the fifth bending portion 53 shrinks toward the axial direction of the fifth nozzle 5. The shrinkage angle of the fifth bending portion 53 is ε, which satisfies ε≥γ, and 20°≤δ≤45°. That is, the shrinkage angle ε of the fifth bending portion 53 can be any angle of 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, and 45°, or a range value between any two angles. During the ignition preheating stage, the flow rate of the gas in the fourth channel 40 when flowing out of the fourth channel 40 is 1-75m / s; during the process feeding stage, the flow rate of the gas in the fourth channel 40 when flowing out of the fourth channel 40 is 30-150m / s; the specific settings can be adjusted according to actual conditions, and this application does not impose any restrictions on this.

[0075] In some embodiments, the fourth nozzle 4 includes a fourth connecting portion 42 and a fourth bending portion 43 connected to each other, the fourth connecting portion 42 is extended along the axial direction of the fourth nozzle 4, the fourth bending portion 43 is contracted toward the axial direction of the fourth nozzle 4, and the contraction angle of the fourth bending portion 43 is δ, satisfying δ≥ε, and 30°≤δ≤60°, that is, the contraction angle δ of the fourth bending portion 43 can be any angle of 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60° or a range value between any two angles. During the ignition and preheating stage, the flow rate of the gas in the fifth channel 50 when flowing out of the fifth channel 50 is 1-75m / s; during the process feeding stage, the flow rate of the gas in the fifth channel 50 when flowing out of the fifth channel 50 is 15-150m / s; the specific settings can be adjusted according to actual conditions, and this application does not impose any restrictions on this.

[0076] In some embodiments, any two, any three, any four, or all of the first nozzle 1, the second nozzle 2, the third nozzle 3, the fourth nozzle 4, and the fifth nozzle 5 of the process burner meet the above conditions.

[0077] Through the above technical scheme, reasonable flow rate and nozzle design ensure the stability and reliability of the ignition preheating stage and the process feeding stage, which on the one hand helps to evenly mix and quickly react the gas, thereby improving the working efficiency of the partial oxidation process operation of the gaseous fuel; on the other hand, the fourth medium is introduced into the process feeding stage through the fifth nozzle 5 to isolate the third medium from the fourth nozzle 4, thereby avoiding the combustible synthesis gas generated in the process feeding stage from burning near the fourth nozzle 4, thereby preventing damage to the fourth nozzle 4.

[0078] In some embodiments, the radial lengths of the inner wall of the first nozzle 1 at various positions on the same axis are equal. That is, the radial lengths of the inner wall of the first channel 10 at various positions on the same axis are equal, and the first nozzle 1 includes the first connecting portion 11 and has no first bending portion 12.

[0079] In some embodiments, the process burner further includes: a plurality of first positioning blocks 21 , which are located in the second channel 20 and are spaced apart on a side of the first nozzle 1 facing the second nozzle 2 .

[0080] In some embodiments, the process burner further includes: a plurality of second positioning blocks 31 , which are located in the third channel 30 and are spaced apart on a side of the second nozzle 2 facing the third nozzle 3 .

[0081] In some embodiments, the process burner further includes: a plurality of third positioning blocks 41 , which are located in the fourth channel 40 and are spaced apart on a side of the third nozzle 3 facing the fourth nozzle 4 .

[0082] In some embodiments, the process burner further includes: a plurality of fourth positioning blocks 51 , which are located in the fifth channel 50 and are spaced apart on a side of the fourth nozzle 4 facing the fifth nozzle 5 .

[0083] In some embodiments, the process burner further includes: any two, any three, or all of a plurality of first positioning blocks 21 , a plurality of second positioning blocks 31 , a plurality of third positioning blocks 41 , and a plurality of fourth positioning blocks 51 .

[0084] In some embodiments, the first positioning block 21 includes a first swirl blade, and the first swirl blade abuts against the inner wall of the second channel 20 .

[0085] In some embodiments, the second positioning block 31 includes a second swirl blade, and the second swirl blade abuts against the inner wall of the third channel 30 .

[0086] In some embodiments, the third positioning block 41 includes a third swirl blade, and the third swirl blade abuts against the inner wall of the fourth channel 40 .

[0087] In some embodiments, the fourth positioning block 51 includes a fourth swirl blade, and the fourth swirl blade abuts against the inner wall of the fifth channel 50 .

[0088] Through the above technical solution, the annular gap size of each channel outlet is guaranteed by the positioning block, and the tolerance of the annular gap size of each outlet can be ±5-20% of the annular gap size. The specific setting can be adjusted according to the actual situation, and this application does not limit this. In addition, by setting the positioning block as a swirl blade structure, the annular gap size can be controlled, and the mixing effect between the reaction media can be enhanced, thereby improving the stability of flame combustion.

[0089] In some embodiments, the fourth nozzle 4 has a cavity, and the cavity is configured to pass a cooling medium. Specifically, the fourth nozzle 4 is a cooling jacket, which is used to pass a cooling medium to cool the process burner head to prevent it from being ablated or deformed by high temperature radiation, so as to extend the service life of the burner.

[0090] In some embodiments, the process burner further includes a flame detection device 7, which is disposed in the first channel 10. That is, the flame detection device 7 is fixed in the first channel 10 and can be used to monitor the combustion state of the flame in real time, including flame intensity, stability, pulsation frequency, etc., so as to facilitate monitoring the combustion state in the reactor where the process burner is installed, ensure the normal combustion process, and thus better control the gaseous fuel partial oxidation process.

[0091] Accordingly, the present application also provides a reactor, including the process burner in the above embodiment. Therefore, the reactor includes all the technical features and beneficial effects of the process burner, which will not be described in detail in the present application.

[0092] In some embodiments, the above-mentioned process burner can be used to continuously and stably transport media such as fuel and oxidant to the reactor where the process burner is installed, so that they are fully mixed and a partial oxidation reaction occurs. The temperature in the reactor is controlled within a preset temperature range, such as 800-2000°C, thereby generating synthesis gas (mainly CO and H2) for use as fuel or for further production of chemicals.

[0093] See also Figure 3 , Figure 3 The flowchart of a method for treating gaseous fuel with a process burner provided in an embodiment of the present application. Accordingly, an embodiment of the present application provides a method for treating gaseous fuel with a process burner, comprising the following steps:

[0094] In the first working mode, the first fuel and the first medium are introduced into the first channel 10, the first medium or the second medium is introduced into the second channel 20 and the third channel 30, the second medium is introduced into the fourth channel 40, and ignition is performed.

[0095] That is, in the first working mode, the first fuel and the first medium are introduced into the first channel 10, the first medium is introduced into the second channel 20 and the third channel 30, and the second medium is introduced into the fourth channel 40, and the ignition device 6 performs ignition. The second channel 20 and the third channel 30 may also be introduced with the second medium.

[0096] In some embodiments, in the first working mode, the following steps are included:

[0097] Step S1: The first fuel and the first medium are introduced into the first channel 10. The initial flow rate of the first fuel in the first channel 10 satisfies 25-50% of the maximum flow rate of the first fuel in the first channel 10. The second medium is introduced into the fourth channel 40. The first medium and the second medium can be introduced into the second channel 20 and the third channel 30. The overall excess air coefficient λ satisfies: 1.0≤λ<2.5. At the same time, the igniter is started to ignite and establish the first ignition flame. An ignition device 6 is provided in the first channel 10 so that the first channel 10 can be used as an independent ignition device. It should be noted that the maximum flow rate of the first fuel in this application can be set based on the actual solution requirements.

[0098] Step S2: After ignition is completed, the flow rates of the first fuel and the first medium introduced into the first channel 10 are gradually increased until the flow rate of the first fuel in the first channel 10 meets 100% of the maximum flow rate of the first fuel in the first channel 10, the second medium is introduced into the fourth channel 40, and the first medium or the second medium can be introduced into the second channel 20 and the third channel 30. During the process, the overall excess air coefficient λ is maintained to meet the following requirements: 1.0≤λ<2.5.

[0099] Step S3: After the first fuel flow in the first channel 10 reaches 100% of the maximum flow of the first fuel in the first channel 10, if the second medium is introduced into the second channel 20 and the third channel 30, the second medium in the second channel 20 and the third channel 30 is switched to the first medium; if the first medium is introduced into the second channel 20 and the third channel 30, the first medium continues to be introduced, and during the process, the overall excess air coefficient λ is maintained to satisfy: 1.0≤λ<2.5.

[0100] In the second working mode, the first fuel and the first medium are introduced into the first channel 10 , the first medium is introduced into the second channel 20 and the third channel 30 , and the first fuel is introduced into the fourth channel 40 .

[0101] In some embodiments, in the second working mode, the method includes:

[0102] Step S4: When the temperature in the reactor where the process burner is installed rises to the first preset temperature, the medium and flow rate in the first channel 10, the second channel 20 and the third channel 30 are maintained unchanged, and the second medium in the fourth channel 40 is switched to the first fuel, thereby establishing a second ignition flame based on the flame formed by the first fuel and the first medium passed into the first channel 10, that is, the flame formed by the first fuel and the first medium passed into the first channel 10 ignites the first fuel passed into the fourth channel 40.

[0103] In the third working mode, the first medium is introduced into the first channel 10 , the second channel 20 , and the third channel 30 , and the first fuel is introduced into the fourth channel 40 .

[0104] In some embodiments, in the third working mode, including:

[0105] Step S5: After the second ignition flame is stabilized, the first fuel in the first channel 10 is cut off, the flow rate of the first fuel in the fourth channel 40 is increased, and the flow rates of the first medium in the first channel 10, the second channel 20 and the third channel 30 are adjusted so that the overall excess air coefficient λ satisfies: λ≤1.0;

[0106] Step S6: gradually increase the flow rate of the first fuel in the fourth channel 40 according to the temperature in the reactor until the flow rate of the first fuel in the fourth channel 40 meets 100% of the maximum flow rate of the first fuel in the fourth channel 40, and adjust the flow rates of the first medium in the first channel 10, the second channel 20 and the third channel 30, and keep the overall excess air coefficient λ to meet: λ≤1.0 during the process. The maximum flow rate of the first fuel in the fourth channel 40 is 2-8 times the maximum flow rate of the first fuel in the first channel 10.

[0107] In the fourth operating mode, the fourth medium is introduced into the first channel 10 , the third medium is introduced into the second channel 20 , the fourth medium is introduced into the third channel 30 , and the second fuel is introduced into the fourth channel 40 .

[0108] In some embodiments, in the fourth working mode, when the temperature in the reactor where the process burner is installed rises to the second preset temperature, wherein the second preset temperature is greater than the first preset temperature, the fourth channel 40 is used to pass the second fuel, the second channel 20 is used to pass the third medium, and the first channel 10 and the third channel 30 are used to pass the fourth medium. The ratio of the mass flow rate of the third medium actually supplied to the mass flow rate of the third medium required for complete combustion of the second fuel is defined as the equivalence ratio φ, then in the fourth working mode, the equivalence ratio is 0.2<φ<0.8, and the mass flow rate of the fourth medium is 0.05-0.75 times the mass flow rate of the third medium.

[0109] In the present application, the first to third working modes are ignition preheating stages, and the fourth working mode is a process feeding stage.

[0110] Through the above technical scheme, in the first working mode and the second working mode, in the ignition preheating stage, in order to prevent the process burner outlet flow rate from being too large and causing the combustion flame to be extinguished, the gas flow rate is gradually increased at the beginning of the ignition preheating stage, and in order to ensure sufficient combustion in the ignition preheating stage, the overall excess air coefficient λ satisfies 1.0≤λ<2.5; after the second working mode, the first fuel is introduced through the fourth channel 40 to increase the total flow of the first fuel so that the ignition preheating stage can shorten the preheating time of the ignition preheating stage under the condition that the temperature rise rate allows, thereby accelerating the working efficiency of the gaseous fuel partial oxidation process operation; in the third working mode, the overall excess air coefficient λ satisfies: λ≤1.0, so as to avoid the third medium content in the reactor being too high when switching to the process feeding stage, causing excessive combustion of the second fuel, so that the synthesis gas components generated by the reaction cannot meet the required synthesis gas component requirements.

[0111] Based on the reactor in which the process burner is installed, for example, in some embodiments of four channels, the contraction angle α of the first bend 12 is 5°, the contraction angle β of the second bend 23 is 14°, the contraction angle γ of the third bend 33 is 23°, and the contraction angle δ of the fourth bend 43 is 34°. The annular gap size at the outlet of the second channel 20 is 3.9±0.4mm, the annular gap size at the outlet of the third channel 30 is 1.8±0.3mm, and the annular gap size at the outlet of the fourth channel 40 is 3.3±0.3mm. In the ignition preheating stage, natural gas at 25°C is used as the first fuel, air at 25°C is used as the first medium, and N2 at 25°C is used as the second medium. The composition of natural gas is: CH4: 92.8vol%, C2H6: 3.8vol%, C3H8: 1.6vol%, H2: 0.9vol%, CO2: 0.9vol%. The process parameters of different steps in the ignition preheating stage are shown in Table 1. In the table, unless otherwise specified, the medium in the second channel and the third channel refers to the first medium, and the medium in the fourth channel refers to the first fuel. For example, N2:10 is specially specified to refer to the flow rate of the second medium as 10kg / h. Among them, the maximum flow rate of the first fuel in the fourth channel 40 is 80kg / h; the maximum flow rate of the first fuel in the first channel 10 is 15kg / h.

[0112] Table 1

[0113]

[0114] When the temperature in the reactor is raised to 900°C in the ignition preheating stage, the process burner is switched to the process feeding stage, and the natural gas with a temperature of 25°C and the same composition as in the ignition preheating stage is used as the second fuel, and the natural gas flow rate is 4800kg / h; the pure oxygen with a purity of 99.6% at 150°C is used as the third medium, and the pure oxygen flow rate is 5160kg / h; the equivalent ratio is 0.277, 320℃ water vapor is used as the fourth medium, and the water vapor flow rate is 1560kg / h; the operating pressure of the reactor is 3.5MPaG. That is, the first channel 10 is connected to the fourth medium, and the outlet flow rate of the first channel 10 is 8.4m / s, the second channel 20 is connected to the third medium, and the outlet flow rate of the second channel 20 is 71.8m / s, the third channel 30 is connected to the fourth medium, and the outlet flow rate of the third channel 30 is 52.8m / s, and the fourth channel 40 is connected to the second fuel, and the outlet flow rate of the fourth channel 40 is 69.5m / s. In this way, a synthesis gas with a temperature of about 1200-1600℃ and a CO+H2 content greater than 85vol% can be generated, which is used as a hot carrier gas for mixed heat exchange with the cracking raw materials downstream of the reactor.

[0115] In other examples of four channels, the first channel 10 is a straight-through structure, that is, the radial distances of each position of the inner wall of the first nozzle are equal everywhere, the contraction angle β of the second bend 23 is 10°, the contraction angle γ of the third bend 33 is 20°, and the contraction angle δ of the fourth bend 43 is 30°. The annular gap size at the outlet of the second channel 20 is 2.5±0.25mm, the annular gap size at the outlet of the third channel 30 is 1.5±0.2mm, and the annular gap size at the outlet of the fourth channel 40 is 4.8±0.5mm. In the ignition preheating stage, 25°C coke oven gas is used as the first fuel, 25°C air is used as the first medium, and 25°C N2 is used as the second medium. The composition of coke oven gas is: CH4: 21.8vol%, C2H6: 0.7vol%, H2: 58.2vol%, CO: 8.3vol%, CO2: 6.5vol%, N2: 4.5vol%. The process parameters of different steps in the ignition preheating stage are shown in Table 2. Unless otherwise specified, the medium in the second channel and the third channel refers to the first medium, and the medium in the fourth channel refers to the first fuel. Among them, the maximum flow rate of the first fuel in the fourth channel 40 is 120kg / h; the maximum flow rate of the first fuel in the first channel 10 is 45kg / h.

[0116] Table 2

[0117]

[0118] When the temperature in the reactor is raised to 1350°C in the ignition preheating stage, the process burner is switched to the process feeding stage, and the 200°C coke oven gas with the same composition as that in the ignition preheating stage is used as the second fuel, and the coke oven gas flow rate is 5400kg / h; a mixture of 200°C pure oxygen with a purity of 99.8% and water vapor is used as the third medium, and the pure oxygen flow rate is 4860kg / h, and the water vapor flow rate is 600kg / h; the equivalent ratio is 0.40, 350℃ water vapor is used as the fourth medium, and the water vapor flow rate is 2070kg / h; the operating pressure of the reactor is 4.0MPaG. That is, the first channel 10 is connected to the fourth medium, and the outlet flow rate of the first channel 10 is 9.4m / s, the second channel 20 is connected to the third medium, and the outlet flow rate of the second channel 20 is 103.3m / s, the third channel 30 is connected to the fourth medium, and the outlet flow rate of the third channel 30 is 38.4m / s, and the fourth channel 40 is connected to the second fuel, and the outlet flow rate of the fourth channel 40 is 104.2m / s.

[0119] In some other examples of four channels, the contraction angle α of the first bend 12 is 9°, the contraction angle β of the second bend 23 is 18°, the contraction angle γ of the third bend 33 is 28°, and the contraction angle δ of the fourth bend 43 is 40°. The annular gap size at the outlet of the second channel 20 is 4.0±0.3mm, the annular gap size at the outlet of the third channel 30 is 2.0±0.2mm, and the annular gap size at the outlet of the fourth channel 40 is 4.8±0.5mm. In the ignition preheating stage, 25°C refinery gas is used as the first fuel, 25°C air is used as the first medium, and 25°C N2 is used as the second medium. The composition of the refinery gas is: CH4: 35.6vol%, C2H6: 17.9vol%, C3H8: 12.7vol%, H2: 17.5vol%, CO: 1.6vol%, CO2: 1.8vol%, N2: 12.9vol%. The process parameters of different steps in the ignition preheating stage are shown in Table 3. Unless otherwise specified, the medium in the second channel and the third channel refers to the first medium, and the medium in the fourth channel refers to the first fuel. Among them, the maximum flow rate of the first fuel in the fourth channel 40 is 135 kg / h; the maximum flow rate of the first fuel in the first channel 10 is 36 kg / h.

[0120] Table 3

[0121]

[0122] When the temperature in the reactor is raised to 1200℃ in the ignition preheating stage, the process burner is switched to the process feeding stage, and the 180℃ refinery gas with the same composition as in the ignition preheating stage is used as the second fuel, and the refinery gas flow rate is 6750kg / h; 220℃ pure oxygen with a purity of 99.6% is used as the third medium, and the pure oxygen flow rate is 6650kg / h; the equivalent ratio is 0.325, 80°C CO2 is used as the fourth medium, and the CO2 flow rate is 5000kg / h; the operating pressure of the reactor is 2.0MPaG. That is, the first channel 10 is fed with the fourth medium, and the outlet flow rate of the first channel 10 is 8.3m / s, the second channel 20 is fed with the third medium, and the outlet flow rate of the second channel 20 is 142.9m / s, the third channel 30 is fed with the fourth medium, and the outlet flow rate of the third channel 30 is 53.8m / s, and the fourth channel 40 is fed with the second fuel, and the outlet flow rate of the fourth channel 40 is 122.4m / s.

[0123] See also Figure 4 , Figure 4 A flowchart of another method for treating gaseous fuel with a process burner provided in an embodiment of the present application. In some embodiments, an embodiment of the present application provides a method for treating gaseous fuel with a process burner, comprising the following steps:

[0124] In some embodiments, in the first working mode, the first fuel and the first medium are introduced into the first channel 10, the second medium is introduced into the second channel 20, and the first medium or the second medium is introduced into the third channel 30 and the fourth channel 40, and ignition is performed;

[0125] In the second working mode, the first fuel and the first medium are introduced into the first channel 10, the first fuel is introduced into the second channel 20, and the first medium is introduced into the third channel 30 and the fourth channel 40;

[0126] In the third working mode, the first medium is introduced into the first channel 10, the third channel 30, and the fourth channel 40, and the first fuel is introduced into the second channel 20;

[0127] In the fourth working mode, the fourth medium is introduced into the first channel 10 , the second fuel is introduced into the second channel 20 , the fourth medium is introduced into the third channel 30 , and the third medium is introduced into the fourth channel 40 .

[0128] In some embodiments, in the first working mode, in the second working mode, and in the third working mode, the first medium or the second medium is introduced into the fifth channel 50 ; in the fourth working mode, the fourth medium is introduced into the fifth channel 50 .

[0129] Based on the reactor in which the process burner is installed, for example, in some five-channel embodiments, the contraction angle α of the first bend 12 is 9°, the contraction angle β of the second bend 23 is 18°, the contraction angle γ of the third bend 33 is 28°, the contraction angle ε of the fifth bend 53 is 40°, and the contraction angle δ of the fourth bend 43 is 54°. The annular gap size at the outlet of the second channel 20 is 6.0±0.4mm, the annular gap size at the outlet of the third channel 30 is 2.9±0.2mm, the annular gap size at the outlet of the fourth channel 40 is 3.4±0.3mm, and the annular gap size at the outlet of the fifth channel 50 is 3.2±0.3mm. In the ignition preheating stage, refinery gas at 25°C is used as the first fuel, air at 25°C is used as the first medium, and N2 at 25°C is used as the second medium. The composition of refinery gas is: CH4: 35.6 vol%, C2H6: 17.9 vol%, C3H8: 12.7 vol%, H2: 17.5 vol%, CO: 1.6 vol%, CO2: 1.8 vol%, N2: 12.9 vol%. The process parameters of different steps in the ignition preheating stage are shown in Table 4. Unless otherwise specified, the medium in the third channel, the fourth channel, and the fifth channel refers to the first medium, and the medium in the second channel refers to the first fuel. Among them, the maximum flow rate of the first fuel in the first channel is 36 kg / h, and the maximum flow rate of the first fuel in the second channel is 135 kg / h.

[0130] Table 4

[0131]

[0132]

[0133] When the temperature in the reactor is raised to 1200°C during the ignition and preheating stage, the process burner is switched to the process feeding stage, and 180°C refinery gas with the same composition as that in the ignition and preheating stage is used as the second fuel, and the refinery gas flow rate is 6750kg / h; 220°C pure oxygen with a purity of 99.6% is used as the third medium, and the pure oxygen flow rate is 6650kg / h; the equivalence ratio φ is 0.325, and 80°C CO2 is used as the fourth medium, and the CO2 flow rate is 5000kg / h; the reactor operating pressure is 2.0MPaG. That is, the first channel 10 passes into the fourth medium, and the outlet flow rate of the first channel 10 is 5.6 m / s, the second channel 20 passes into the second fuel, and the outlet flow rate of the second channel 20 is 125.9 m / s, the third channel 30 passes into the fourth medium, and the outlet flow rate of the third channel 30 is 20.3 m / s, the fourth channel 40 passes into the third medium, and the outlet flow rate of the fourth channel 40 is 121.2 m / s, and the fifth channel 50 passes into the fourth medium, and the outlet flow rate of the fifth channel 50 is 15.9 m / s.

[0134] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0135] The above is a detailed introduction to a process burner, a reactor and a method for treating gaseous fuel with a process burner provided in the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A process burner, characterized in that: include: A first nozzle (1) having a first passage (10); A second nozzle (2) is sleeved on the outer periphery of the first nozzle (1) and forms a second channel (20) with the outer wall of the first nozzle (1); A third nozzle (3) is sleeved on the outer periphery of the second nozzle (2) and forms a third channel (30) with the outer wall of the second nozzle (2); a fourth nozzle (4) which is sleeved on the outer periphery of the third nozzle (3) and forms a fourth channel (40) with the outer wall of the third nozzle (3); an ignition device (6) disposed in the first channel (10); The first channel (10) and at least one of the second channel (20), the third channel (30), and the fourth channel (40) are used to introduce a first fuel; and the second channel (20), at least one of the third channel (30), and the fourth channel (40) are used to introduce a second fuel.

2. The process burner according to claim 1, characterized in that: Also includes: The fifth nozzle (5) is sleeved between the third nozzle (3) and the fourth nozzle (4); the outer wall of the fifth nozzle (5) and the third nozzle (3) form a fourth channel (40); the outer wall of the fourth nozzle (4) and the fifth nozzle (5) form a fifth channel (50).

3. The process burner according to claim 1, characterized in that: The first nozzle (1) comprises a first connecting portion (11) and a first bending portion (12) connected to each other, the first connecting portion (11) extending along the axial direction of the first nozzle (1), the first bending portion (12) shrinking toward the axial direction of the first nozzle (1), the shrinkage angle of the first bending portion (12) being α, satisfying 0°≤α≤15°; and / or, The second nozzle (2) comprises a second connecting portion (22) and a second bending portion (23) connected to each other, the second connecting portion (22) is extended along the axial direction of the second nozzle (2), the second bending portion (23) is contracted toward the axial direction of the second nozzle (2), and the contraction angle of the second bending portion (23) is β, which satisfies β≥α, and 5°≤β≤24°; and / or, The third nozzle (3) comprises a third connecting portion (32) and a third bending portion (33) connected to each other, the third connecting portion (32) extending along the axial direction of the third nozzle (3), the third bending portion (33) shrinking toward the axial direction of the third nozzle (3), the shrinkage angle of the third bending portion (33) is γ, satisfying γ ≥ β, and 10° ≤ γ ≤ 30°; and / or, The fourth nozzle (4) comprises a fourth connecting portion (42) and a fourth bending portion (43) which are connected to each other. The fourth connecting portion (42) is extended along the axial direction of the fourth nozzle (4). The fourth bending portion (43) shrinks toward the axial direction of the fourth nozzle (4). The shrinkage angle of the fourth bending portion (43) is δ, which satisfies δ≥γ and 20°≤δ≤45°.

4. The process burner according to claim 2, characterized in that: The first nozzle (1) comprises a first connecting portion (11) and a first bending portion (12) connected to each other, the first connecting portion (11) extending along the axial direction of the first nozzle (1), the first bending portion (12) shrinking toward the axial direction of the first nozzle (1), the shrinkage angle of the first bending portion (12) being α, satisfying 0°≤α≤15°; and / or, The second nozzle (2) comprises a second connecting portion (22) and a second bending portion (23) connected to each other, the second connecting portion (22) is extended along the axial direction of the second nozzle (2), the second bending portion (23) is contracted toward the axial direction of the second nozzle (2), and the contraction angle of the second bending portion (23) is β, which satisfies β≥α, and 5°≤β≤24°; and / or, The third nozzle (3) comprises a third connecting portion (32) and a third bending portion (33) connected to each other, the third connecting portion (32) extending along the axial direction of the third nozzle (3), the third bending portion (33) shrinking toward the axial direction of the third nozzle (3), the shrinkage angle of the third bending portion (33) is γ, satisfying γ ≥ β, and 10° ≤ γ ≤ 30°; and / or, The fifth nozzle (5) comprises a fifth connecting portion (52) and a fifth bending portion (53) connected to each other, the fifth connecting portion (52) extending along the axial direction of the fifth nozzle (5), the fifth bending portion (53) shrinking toward the axial direction of the fifth nozzle (5), the shrinkage angle of the fifth bending portion (53) is ε, satisfying ε≥γ, and 20°≤ε≤45°; and / or, The fourth nozzle (4) comprises a fourth connecting portion (42) and a fourth bending portion (43) which are connected to each other. The fourth connecting portion (42) is extended along the axial direction of the fourth nozzle (4), and the fourth bending portion (43) is contracted toward the axial direction of the fourth nozzle (4). The contraction angle of the fourth bending portion (43) is δ, which satisfies δ≥ε and 30°≤δ≤60°.

5. The process burner according to claim 1, characterized in that: The radial lengths of the inner wall of the first nozzle (1) at various positions on the same axis are equal.

6. The process burner according to claim 2, characterized in that: Also includes: a plurality of first positioning blocks (21), located in the second channel (20) and arranged at intervals on a side of the first nozzle (1) facing the second nozzle (2); and / or, a plurality of second positioning blocks (31), located in the third channel (30) and arranged at intervals on a side of the second nozzle (2) facing the third nozzle (3); and / or, a plurality of third positioning blocks (41), located in the fourth channel (40) and arranged at intervals on a side of the third nozzle (3) facing the fourth nozzle (4); and / or, A plurality of fourth positioning blocks (51) are located in the fifth channel (50) and are arranged at intervals on a side of the fourth nozzle (4) facing the fifth nozzle (5).

7. The process burner according to claim 6, characterized in that: The first positioning block (21) comprises a first swirl blade, and the first swirl blade abuts against the inner wall of the second channel (20); The second positioning block (31) comprises a second swirl blade, and the second swirl blade abuts against the inner wall of the third channel (30); The third positioning block (41) comprises a third swirl blade, and the third swirl blade abuts against the inner wall of the fourth channel (40); The fourth positioning block (51) comprises a fourth swirl blade, and the fourth swirl blade abuts against the inner wall of the fifth channel (50).

8. The process burner according to claim 1, characterized in that: At least one of the second channel (20), the third channel (30), and the fourth channel (40) is used for introducing the second fuel or the second medium.

9. The process burner according to claim 1, characterized in that: At least one of the second channel (20), the third channel (30), and the fourth channel (40) is used to introduce the first fuel and the second medium.

10. The process burner according to claim 1, characterized in that: The first channel (10) is used to allow the first medium and the fourth medium to pass through; The second channel (20) is used to pass at least one of the first medium and the second medium and a third medium, and the fourth channel (40) is used to pass the second medium; or, the second channel (20) is used to pass the second medium; the fourth channel (40) is used to pass the first medium, at least one of the second medium and a third medium; The third channel (30) is used to pass at least one of the first medium and the second medium and the fourth medium.

11. The process burner according to claim 2, characterized in that: The first channel (10) is used to allow the first medium and the fourth medium to pass through; The second channel (20) is used to pass the first medium, at least one of the second medium and a third medium, and the fourth channel (40) is used to pass the second medium; or, the second channel (20) is used to pass the second medium, and the fourth channel (40) is used to pass the first medium, at least one of the second medium and a third medium; The third channel (30) is used to pass at least one of the first medium and the second medium and the fourth medium; The fifth channel (50) is used to pass at least one of the first medium and the second medium and the fourth medium.

12. The process burner according to claim 1, characterized in that: The fourth nozzle (4) has a cavity, and the cavity is configured to allow a cooling medium to flow into it.

13. The process burner according to claim 1, characterized in that: Also includes: A flame detection device (7) is arranged in the first channel (10).

14. A reactor, characterized in that: Comprising a process burner as claimed in any one of claims 1 to 13.

15. A method for treating gaseous fuel with a process burner, characterized in that: include: In a first working mode, a first fuel and a first medium are introduced into the first channel (10), the first medium or the second medium is introduced into the second channel (20) and the third channel (30), and the second medium is introduced into the fourth channel (40), and ignition is performed; In a second working mode, the first fuel and the first medium are introduced into the first channel (10), the first medium is introduced into the second channel (20) and the third channel (30), and the first fuel is introduced into the fourth channel (40); In a third working mode, the first medium is introduced into the first channel (10), the second channel (20), and the third channel (30), and the first fuel is introduced into the fourth channel (40); In a fourth working mode, a fourth medium is introduced into the first channel (10), a third medium is introduced into the second channel (20), the fourth medium is introduced into the third channel (30), and a second fuel is introduced into the fourth channel (40).

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