Process burner, reaction furnace and method for treating gaseous fuel with a process burner

Abstract

The application discloses a process burner, a reaction furnace and a method for processing gaseous fuel by using the process burner, and belongs to the technical field of chemical equipment. The process burner comprises a first nozzle having a first channel, and an ignition device arranged in the first channel; a second nozzle and an outer wall of the first nozzle form a second channel; a third nozzle and an outer wall of the second nozzle form a third channel; a fourth nozzle and an outer wall of the third nozzle form a fourth channel; wherein at least one of the second channel, the third channel and the fourth channel and the first channel are used for feeding a first fuel; and at least one of the second channel, the third channel and the fourth channel is used for feeding a second fuel. The process burner designed in the application integrates the ignition preheating and process feeding functions by constructing multiple channels, so that the ignition preheating and process feeding processes can be realized by using one burner in the gaseous fuel partial oxidation process, and the cumbersome operation of replacing different burners is avoided.

Description

Technical Field

[0001] This application belongs to the technical field of chemical equipment, specifically relating to a process burner, a reactor, and a method for processing gaseous fuels using the process burner. Background Technology

[0002] Gaseous fuels are a very important basic energy source and chemical raw material in chemical production. The partial oxidation process of gaseous fuels involves continuously and stably feeding these gaseous fuels and oxidants into the reactor through process burners, so that they can be effectively mixed in a reasonable flow field and undergo a partial oxidation reaction, which can convert them into syngas, which can then be used to prepare various chemicals, blast furnace metallurgy, and industrial and urban gas.

[0003] In the current gaseous fuel partial oxidation process, the burner operation procedure is complicated, which affects the operating cost and safety of the reactor. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a process burner, a reactor, and a method for processing gaseous fuels using the process burner, which solves the technical problem of cumbersome operation procedures in the partial oxidation process of gaseous fuels.

[0005] This application provides a process burner, comprising: a first nozzle having a first channel; a second nozzle sleeved on the outer periphery of the first nozzle and forming a second channel with the outer wall of the first nozzle; a third nozzle sleeved on the outer periphery of the second nozzle and forming a third channel with the outer wall of the second nozzle; a fourth nozzle sleeved on the outer periphery of the third nozzle and forming a fourth channel with the outer wall of the third nozzle; and an ignition device disposed within the first channel; at least one of the second, third, and fourth channels and the first channel are used to introduce a first fuel; and at least one of the second, third, and fourth channels is used to introduce a second fuel.

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

[0007] In some embodiments, the first nozzle includes a first connecting portion and a first bent portion connected together. The first connecting portion extends along the axial direction of the first nozzle, and the first bent portion contracts toward the axial direction of the first nozzle. The contraction angle of the first bent portion is α, satisfying 0°≤α≤15°; and / or,

[0008] The second nozzle includes a second connecting portion and a second bend portion connected together. The second connecting portion extends along the axial direction of the second nozzle, and the second bend portion contracts toward the axial direction of the second nozzle. The contraction angle of the second bend portion is β, satisfying β≥α and 5°≤β≤24°; and / or,

[0009] The third nozzle includes a third connecting portion and a third bend portion connected together. The third connecting portion extends along the axial direction of the third nozzle, and the third bend portion contracts toward the axial direction of the third nozzle. The contraction angle of the third bend portion is γ, satisfying γ≥β and 10°≤γ≤30°; and / or,

[0010] The fourth nozzle includes a fourth connecting part and a fourth bending part connected together. The fourth connecting part extends along the axial direction of the fourth nozzle, and the fourth bending part contracts toward the axial direction of the fourth nozzle. The contraction angle of the fourth bending part is δ, which satisfies δ≥γ and 20°≤δ≤45°.

[0011] In some embodiments, the first nozzle includes a first connecting portion and a first bent portion connected together. The first connecting portion extends along the axial direction of the first nozzle, and the first bent portion contracts toward the axial direction of the first nozzle. The contraction angle of the first bent portion is α, satisfying 0°≤α≤15°; and / or,

[0012] The second nozzle includes a second connecting portion and a second bend portion connected together. The second connecting portion extends along the axial direction of the second nozzle, and the second bend portion contracts toward the axial direction of the second nozzle. The contraction angle of the second bend portion is β, satisfying β≥α and 5°≤β≤24°; and / or,

[0013] The third nozzle includes a third connecting portion and a third bend portion connected together. The third connecting portion extends along the axial direction of the third nozzle, and the third bend portion contracts toward the axial direction of the third nozzle. The contraction angle of the third bend portion is γ, satisfying γ≥β and 10°≤γ≤30°; and / or,

[0014] The fifth nozzle includes a fifth connecting portion and a fifth bend portion connected together. The fifth connecting portion extends along the axial direction of the fifth nozzle, and the fifth bend portion contracts toward the axial direction of the fifth nozzle. The contraction angle of the fifth bend portion is ε, satisfying ε≥γ, and 20°≤ε≤45°; and / or,

[0015] The fourth nozzle includes a fourth connecting part and a fourth bending part connected together. The fourth connecting part extends along the axial direction of the fourth nozzle, and the fourth bending part contracts toward the axial direction of the fourth nozzle. The contraction angle of the fourth bending part is δ, which satisfies δ≥ε and 30°≤δ≤60°.

[0016] In some embodiments, the radial length of the inner wall of the first nozzle is equal at all locations along the same axis.

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

[0018] Multiple second positioning blocks are located within the third channel and spaced apart on the side of the second nozzle facing the third nozzle; and / or,

[0019] Multiple third positioning blocks are located within the fourth channel and spaced apart on the side of the third nozzle facing the fourth nozzle; and / or,

[0020] Multiple fourth positioning blocks are located within the fifth channel and are spaced apart on the side of the fourth nozzle facing the fifth nozzle.

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

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

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

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

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

[0026] In some embodiments, the fourth nozzle has a cavity configured to allow a cooling medium to pass through it.

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

[0028] Accordingly, this application also provides a reactor, including the process burner as described in the above embodiments.

[0029] Accordingly, this application also provides a method for treating gaseous fuels with a process burner, comprising:

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

[0031] The beneficial effects of this application are as follows: This application provides a process burner, a reactor, and a method for processing gaseous fuel using the process burner. The process burner in this 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 disposed within the first channel. The second nozzle is sleeved around 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 around 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 around the outer periphery of the third nozzle and forms a fourth channel with the outer wall of the third nozzle. At least one of the second, third, and fourth channels, as well as the first channel, is used to introduce first fuel; at least one of the second, third, and fourth channels is used to introduce second fuel. This application designs a process burner that integrates ignition preheating and process feeding functions through multiple channels, enabling the ignition preheating and process feeding processes to be realized through a single burner in the partial oxidation process of gaseous fuel, avoiding the cumbersome operation of changing different burners. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

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

[0035] Figure 3 A flowchart illustrating a method for treating gaseous fuel using a process burner, as provided in this application embodiment;

[0036] Figure 4 A flowchart illustrating another method for treating gaseous fuel using a burner, as provided in this application embodiment;

[0037] Explanation of reference numerals in the attached figures:

[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 Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" generally refer to the upper, lower, left, and right in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and at least one means one, two, or more, unless otherwise explicitly specified.

[0040] This application provides a process burner, a reactor, and a method for processing gaseous fuel using the process burner, which are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0041] Natural gas, coke oven gas, and refinery gas, rich in hydrocarbons such as CH4 and C2H6, are essential basic energy sources and chemical raw materials in chemical production. The partial oxidation process for gaseous fuels involves continuously and stably feeding these gaseous fuels and oxidants into a reactor via process burners. This allows for effective mixing and partial oxidation within a suitable flow field, converting them into syngas, primarily composed of CO and H2. This syngas can then be used to produce synthetic ammonia, methanol, and various liquid fuels, as well as in blast furnace metallurgy and industrial and urban gas production.

[0042] Currently, most gaseous fuel partial oxidation processes employ hot-wall reactors with refractory bricks, requiring two burner systems: a preheating burner and a process burner. First, during the ignition preheating stage, the preheating burner preheats the refractory bricks to a certain temperature. Then, the preheating burner is removed and replaced with a process burner. Next, during the process feeding stage, the regenerable heat from the refractory bricks ignites the fuel and oxidant mixture fed into the process burner. However, this method is cumbersome, and some air is drawn into the reactor during burner replacement. If burner replacement is not timely, the reactor temperature may drop, preventing fuel ignition. Furthermore, improper burner replacement can easily pose safety risks, significantly impacting both the operating costs and safety of the reactor.

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

[0044] Please see Figure 1 , Figure 1 This is a cross-sectional view of a process burner provided in an embodiment of this application. The process burner includes: a first nozzle 1 having a first channel 10; a second nozzle 2 sleeved around the outer periphery of the first nozzle 1, forming a second channel 20 with the outer wall of the first nozzle 1; a third nozzle 3 sleeved around the outer periphery of the second nozzle 2, forming a third channel 30 with the outer wall of the second nozzle 2; a fourth nozzle 4 sleeved around the outer periphery of the third nozzle 3, forming a fourth channel 40 with the outer wall of the third nozzle 3; and an ignition device 6 disposed within 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 introduce a first fuel; at least one of the second channel 20, the third channel 30, and the fourth channel 40 is used to introduce a second fuel.

[0045] In this application, the ignition device 6 is disposed within the first channel 10, and the end of the ignition device 6 facing the outlet of the first channel 10 is used for ignition 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, as well as into the first channel 10; the second fuel is introduced into at least one of the second channel 20, the third channel 30, and the fourth channel 40. The nozzle is a burner nozzle, a key component of combustion equipment, whose function is to inject the medium into the combustion chamber to achieve the combustion process. Each nozzle has a through-hole extending through both ends, and the nozzles are sequentially fitted through the through-holes to form the first channel 10, the second channel 20, the third channel 30, and the fourth channel 40. 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 through the inlet. It should be noted that fuel is a type of medium; 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, second channel 20, third channel 30, and fourth channel 40 are constructed based on each nozzle. This allows the application to meet the requirements of the first fuel and the second fuel introduction with a single burner, and ignition can be performed through the ignition device 6. This integrates ignition preheating and process feeding, making the partial oxidation process of gaseous fuel more convenient. On the one hand, it avoids the cumbersome operation of changing different burners; on the other hand, it avoids the temperature drop inside the reactor caused by improper burner replacement. This addresses safety risks such as gas leakage. Furthermore, at least one of the second channel 20, the third channel 30, and the fourth channel 40, along with the first channel 10, is used to introduce the first fuel. Introducing the first fuel through at least two channels increases the total flow rate of the first fuel, thereby shortening the preheating time of the ignition preheating stage, provided the temperature rise rate is permissible. Additionally, at least one of the second channel 20, the third channel 30, and the fourth channel 40 is used to introduce the second fuel, accelerating the feed rate and thus improving the efficiency of the gaseous fuel partial oxidation process. It should also be noted that the ignition preheating stage aims to raise the temperature to the preset temperature required for the feed stage. However, each channel has a flow rate limit. Under these flow rate constraints, the temperature rise during the ignition preheating stage will be limited, potentially failing to reach the preset temperature required for the feed stage, thus affecting the normal operation of the gaseous fuel partial oxidation process. Therefore, increasing the flow rate of the first fuel through at least two channels further ensures the normal operation of the gaseous fuel partial oxidation process.

[0047] In some embodiments, 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.

[0048] In other words, 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. For example, 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 both the second channel 20 and the third channel 30 are used for introducing the first fuel, then both the second channel 20 and the third channel 30 are also used for introducing the second medium. 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, this prevents the channels in the second channel 20, the third channel 30, and the fourth channel 40 used for introducing the first fuel from backfired due to the medium containing oxygen in the channels during the process of switching to the first fuel. On the other hand, it prevents the high-temperature flue gas generated by the reaction during the ignition preheating stage from entering the channels and affecting the use of the burner when the first fuel is not introduced.

[0050] In some embodiments, at least one of the second channel 20, the third channel 30, and the fourth channel 40 is used to introduce the second fuel or the second medium. That is, the channel in the second channel 20, the third channel 30, and the fourth channel 40 used to introduce the second fuel is also used to introduce the second medium; for example, if the second channel 20 is used to introduce the second fuel, then the second channel 20 is also used to introduce the second medium; if both the second channel 20 and the third channel 30 are used to introduce the second fuel, then both the second channel 20 and the third channel 30 are also used to introduce the second medium; wherein, in different operating modes, the second medium or the second fuel is introduced 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, this prevents the channels in the second channel 20, the third channel 30, and the fourth channel 40 from backfired due to the medium containing oxygen in the channels during the process of switching to the second fuel. On the other hand, it prevents the synthesis gas generated by the reaction from entering the channels and affecting the use of the burner when the second fuel is not introduced during the process feeding stage.

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

[0053] In other words, 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. For example, 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 both the second channel 20 and the third channel 30 are 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. 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 used for introducing the first fuel in the second channel 20, the third channel 30, and the fourth channel 40 are not used to introduce any other media besides the first fuel and the second medium during the ignition preheating stage; the channels used for introducing the second fuel are not used to introduce any other media besides the first fuel, the second fuel, and the second medium during the ignition preheating and process feeding stages.

[0055] By introducing the above technical solution into the same channel for the first fuel, the second fuel, and the second medium, backfire in the channel due to the presence of oxygen in the medium is avoided during the switching between the first and second fuels. Furthermore, it prevents high-temperature flue gas or syngas generated during the partial oxidation of gaseous fuels from entering the channel when neither the first nor the second fuel is being introduced, thus avoiding interference with the combustion process and burner operation. Additionally, it reduces the occupancy of the channel, thereby reducing the complexity of the medium supply pipeline and consequently simplifying the feeding mechanism of the partial oxidation of gaseous fuels. Moreover, it allows for flexible adjustment of the medium supplied to other channels based on demand, contributing to the optimization and efficiency improvement of the partial oxidation of gaseous fuels.

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

[0057] In other words, in some embodiments, the first channel 10 is used to introduce the first medium and the fourth medium; 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; and the fourth channel 40 is used to introduce the second medium. That is to say, the first channel 10 is used to introduce the first medium and the fourth medium; the second channel 20 is used to introduce the first medium and the third medium, or it can be used to introduce the second medium and the third medium, or it can be used to introduce the first medium, the second medium and the third medium; the third channel 30 is used to introduce the first medium and the fourth medium, or it can be used to introduce the second medium and the fourth medium, or it can be used to introduce the first medium, the second medium and the fourth medium; and the fourth channel 40 is used to introduce the second medium.

[0058] In some embodiments, the first channel 10 is used to introduce the first medium and the fourth medium; the second channel 20 is used to introduce the second medium; the third channel 30 is used to introduce at least one of the first medium and the second medium and the fourth medium; and the fourth channel 40 is used to introduce at least one of the first medium and the second medium and the third medium. That is, the first channel 10 is used to introduce the first medium and the fourth medium; the second channel 20 is used to introduce the second medium; the third channel 30 is used to introduce the first medium and the fourth medium, or the third channel 30 can be used to introduce the second medium and the fourth medium, or the fourth channel 40 can be used to introduce the first medium and the third medium, or the fourth channel 40 can be used to introduce the first medium and the third medium, or the fourth channel 40 can be used to introduce the first medium, the second medium and the third medium, or the fourth channel 40 can be used to introduce 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 during the ignition and preheating stage, no other media are introduced except for the second medium; the second fuel is introduced into the channel during the ignition, preheating, and process feeding stages, where no other media are introduced except for the first fuel and the second medium. The media introduction scheme of each channel of the process burner in this application can be adjusted according to actual conditions, and is not limited to the media introduction scheme mentioned in this application. Furthermore, in different operating modes, media are introduced into each channel to prevent the high-temperature flue gas or syngas generated by the reaction from entering the channels and thus affecting the combustion process and the use of the burner.

[0060] In this embodiment, the first fuel can be one or more of gaseous fuels such as natural gas, purge gas, coke oven gas, pyrolysis gas, and refinery gas as ignition fuel; the second fuel can be one or more of gaseous fuels such as natural gas, purge gas, coke oven gas, pyrolysis gas, and refinery gas as process fuel; the first medium can be air as 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 of oxygen, air, or other oxygen-enriched gases as primary oxidant; and the fourth medium can be one or more non-combustion-supporting gases such as CO2 or water vapor as secondary oxidant. The process fuel component used in the process feeding stage, i.e., the second fuel, can be the same as or different from the ignition fuel used in the ignition and preheating stage, i.e., the first fuel.

[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; and 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; and the fourth channel 40 is used to introduce the second medium, the first fuel, and the second fuel.

[0062] Through the above technical solutions, based on different working modes, the first channel 10, second channel 20, third channel 30, and fourth channel 40 in the process burner designed in this application introduce corresponding media into the channels according to a preset scheme of the introduced media. This allows a single process burner to achieve ignition preheating and process feeding. Furthermore, the multi-channel design allows for flexible switching of the feeding mechanism based on needs, improving the flexibility of the process to adapt to different requirements. Specifically, the first fuel and the first medium are introduced into the first channel, and the first fuel can be ignited by an igniter set 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, avoiding damage to the burner. Furthermore, introducing the second medium into the same channel as the first fuel and the second fuel reduces channel occupancy, simplifies the structure, and allows other channels to flexibly adjust the introduced media based on needs, which helps to optimize and improve the efficiency of the gaseous fuel partial oxidation process.

[0063] In some embodiments, the first nozzle 1 includes a first connecting portion 11 and a first bending portion 12 connected together. The first connecting portion 11 extends along the axial direction of the first nozzle 1, and the first bending portion 12 contracts 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 or a range between any two angles from 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, and 15°. During the ignition preheating stage, the gas velocity when exiting the first channel 10 is 10-150 m / s; during the process feeding stage, the gas velocity when exiting the first channel 10 is 5-60 m / s. The specific settings can be adjusted according to the actual situation, and this application does not limit them.

[0064] In some embodiments, the second nozzle 2 includes a second connecting portion 22 and a second bending portion 23 connected together. The second connecting portion 22 extends along the axial direction of the second nozzle 2, and the second bending portion 23 contracts toward the axial direction of the second nozzle 2. The contraction angle of the second bending portion 23 is β, which satisfies β≥α and 5°≤β≤24°. That is, the contraction angle β of the second bending portion 23 can be any angle or a range between any two angles from 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, and 24°. During the ignition and preheating stage, the gas velocity when it flows out of the second channel 20 is 10-150 m / s; during the process feeding stage, the gas velocity when it flows out of the second channel 20 is 30-150 m / s; the specific settings can be adjusted according to the actual situation, and this application does not impose any restrictions on them.

[0065] In some embodiments, the third nozzle 3 includes a third connecting portion 32 and a third bending portion 33 connected together. The third connecting portion 32 extends along the axial direction of the third nozzle 3, and the third bending portion 33 contracts toward the axial direction of the third nozzle 3. The contraction angle of the third bending portion 33 is γ, which satisfies γ≥β and 10°≤γ≤30°. That is, the contraction angle γ of the third bending portion 33 can be any angle or a range between any two angles from 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, and 30°. During the ignition and preheating stage, the gas velocity when it flows out of the third channel 30 is 1-75 m / s. During the process feeding stage, the gas velocity when it flows out of the third channel 30 is 20-150 m / s. The specific settings can be adjusted according to the actual situation, and this application does not impose any restrictions on them.

[0066] In some embodiments, the fourth nozzle 4 includes a fourth connecting portion 42 and a fourth bending portion 43 connected together. The fourth connecting portion 42 extends along the axial direction of the fourth nozzle 4, and the fourth bending portion 43 contracts toward the axial direction of the fourth nozzle 4. The contraction angle of the fourth bending portion 43 is δ, which satisfies δ≥γ and 20°≤δ≤45°. That is, the contraction angle δ of the fourth bending portion 43 can be any angle or a range between any two angles from 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°. During the ignition and preheating stage, the gas velocity exiting the fourth channel 40 is 1-75 m / s; during the process feeding stage, the gas velocity exiting the fourth channel 40 is 30-150 m / s. Specific settings can be adjusted according to actual conditions, and this application does not impose any limitations on them. In some embodiments, any two, any three, or all of the first nozzle 1, second nozzle 2, third nozzle 3, and fourth nozzle 4 of the process burner satisfy the above conditions.

[0067] The above technical solution utilizes a multi-channel design to allow different media to be introduced simultaneously or sequentially within the same burner, enabling complex process control. Each nozzle consists of a connecting section and a bend, with the bend contracting towards the nozzle axis to form a specific contraction angle. This helps control the gas flow rate and direction, and also facilitates gas mixing. The optimized flow rate and nozzle design ensure stability and reliability during the ignition preheating and process feeding stages, and promotes uniform gas mixing and rapid reaction, thereby improving the operational efficiency of the gaseous fuel partial oxidation process.

[0068] In some embodiments, the process burner of this application is suitable for pressures not exceeding 10 MPa. This makes the process burner of this application widely applicable in various high-pressure application scenarios. Please refer to... Figure 2 , Figure 2 This is a cross-sectional view of another process burner provided in an embodiment of this application. In some embodiments, the process burner further includes: a fifth nozzle 5, sleeved between the third nozzle 3 and the fourth nozzle 4, wherein the outer walls of the fifth nozzle 5 and the third nozzle 3 form a fourth channel 40, and the outer walls 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 allow at least one of the first medium, the second medium, and the fourth medium to pass through. That is, the fifth channel 50 can allow the first medium and the fourth medium to pass through; or the fifth channel 50 can allow the second medium and the fourth medium to pass through; or the fifth channel 50 can allow the first medium, the second medium, and the fourth medium to pass through.

[0070] Through the above technical solution, the fifth channel 50 is circulated with one of the first, second, or fourth media under different operating modes. On the one hand, this prevents the high-temperature flue gas generated during the ignition and preheating stage or the syngas generated during the process feeding stage from entering the channel and affecting the burner's operation. On the other hand, by circulating the fourth media during the process feeding stage, the third media is isolated from the fourth nozzle, preventing the combustible syngas generated during the process feeding stage from burning near the fourth nozzle and preventing damage to the fourth nozzle. Furthermore, in this application, based on different operating modes, the first channel 10, second channel 20, third channel 30, fourth channel 40, and fifth channel 50 of the process burner of this application are circulated with corresponding media according to a preset scheme, so that ignition and preheating and process feeding processes can be achieved through a single 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 together. The first connecting portion 11 extends along the axial direction of the first nozzle 1, and the first bending portion 12 contracts 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 or a range between any two angles from 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, and 15°. During the ignition preheating stage, the gas velocity when exiting the first channel 10 is 10-150 m / s; during the process feeding stage, the gas velocity when exiting the first channel 10 is 5-60 m / s. The specific settings can be adjusted according to the actual situation, and this application does not limit them.

[0072] In some embodiments, the second nozzle 2 includes a second connecting portion 22 and a second bending portion 23 connected together. The second connecting portion 22 extends along the axial direction of the second nozzle 2, and the second bending portion 23 contracts toward the axial direction of the second nozzle 2. The contraction angle of the second bending portion 23 is β, which satisfies β≥α and 5°≤β≤24°. That is, the contraction angle β of the second bending portion 23 can be any angle or a range between any two angles from 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, and 24°. During the ignition and preheating stage, the gas velocity when it flows out of the second channel 20 is 10-150 m / s; during the process feeding stage, the gas velocity when it flows out of the second channel 20 is 30-150 m / s; the specific settings can be adjusted according to the actual situation, and this application does not impose any restrictions on them.

[0073] In some embodiments, the third nozzle 3 includes a third connecting portion 32 and a third bending portion 33 connected together. The third connecting portion 32 extends along the axial direction of the third nozzle 3, and the third bending portion 33 contracts toward the axial direction of the third nozzle 3. The contraction angle of the third bending portion 33 is γ, which satisfies γ≥β and 10°≤γ≤30°. That is, the contraction angle γ of the third bending portion 33 can be any angle or a range between any two angles from 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, and 30°. During the ignition and preheating stage, the gas velocity when it flows out of the third channel 30 is 1-75 m / s. During the process feeding stage, the gas velocity when it flows out of the third channel 30 is 20-150 m / s. The specific settings can be adjusted according to the actual situation, and this application does not impose any restrictions on them.

[0074] In some embodiments, the fifth nozzle 5 includes a fifth connecting portion 52 and a fifth bending portion 53 connected together. The fifth connecting portion 52 extends along the axial direction of the fifth nozzle 5, and the fifth bending portion 53 contracts toward the axial direction of the fifth nozzle 5. The contraction angle of the fifth bending portion 53 is ε, which satisfies ε≥γ and 20°≤δ≤45°. That is, the contraction angle ε of the fifth bending portion 53 can be any angle or a range between any two angles from 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°. During the ignition and preheating stage, the gas velocity when exiting the fourth channel 40 is 1-75 m / s; during the process feeding stage, the gas velocity when exiting the fourth channel 40 is 30-150 m / s; the specific settings can be adjusted according to the actual situation, and this application does not impose any restrictions on them.

[0075] In some embodiments, the fourth nozzle 4 includes a fourth connecting portion 42 and a fourth bending portion 43 connected together. The fourth connecting portion 42 extends along the axial direction of the fourth nozzle 4, and the fourth bending portion 43 contracts 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°. That is, the contraction angle δ of the fourth bending portion 43 can be any angle or a range between any two angles from 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°, and 60°. During the ignition and preheating stage, the gas velocity when exiting the fifth channel 50 is 1-75 m / s; during the process feeding stage, the gas velocity when exiting the fifth channel 50 is 15-150 m / s; the specific settings can be adjusted according to the actual situation, and this application does not impose any restrictions on them.

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

[0077] Through the above technical solutions, the reasonable flow rate and nozzle design ensure the stability and reliability of the ignition preheating stage and the process feeding stage. On the one hand, it helps the gas to mix evenly and react quickly, thereby improving the working efficiency of the gaseous fuel partial oxidation process. On the other hand, by introducing the fourth medium through the fifth nozzle 5 during the process feeding stage, the third medium is isolated from the fourth nozzle 4, preventing the combustible syngas generated during the process feeding stage from burning near the fourth nozzle 4 and preventing damage to the fourth nozzle 4.

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

[0079] In some embodiments, the process burner further includes: a plurality of first positioning blocks 21 located within the second channel 20 and spaced apart on the 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 located within the third channel 30 and spaced apart on the 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 located within the fourth channel 40 and spaced apart on the 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 located within the fifth channel 50 and spaced apart on the side of the fourth nozzle 4 facing the fifth nozzle 5.

[0083] In some embodiments, the process burner further includes: any two or 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 vane, which abuts against the inner wall of the second channel 20.

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

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

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

[0088] The above technical solution ensures the annular gap size at the outlet of each channel by using positioning blocks. The tolerance of the annular gap size at each outlet can be ±5-20% of the annular gap size, and the specific setting can be adjusted according to the actual situation. This application does not impose any restrictions on this. Furthermore, by setting the positioning blocks as swirl vane structures, the annular gap size can be controlled, while 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 configured to allow the introduction of a cooling medium. Specifically, the fourth nozzle 4 is a cooling jacket used to introduce a cooling medium to cool the head of the process burner, preventing it from being burned or deformed by high-temperature radiation, thereby extending the burner's service life.

[0090] In some embodiments, the process burner further includes a flame detection device 7 disposed within the first channel 10. That is, the flame detection device 7 is fixed within the first channel 10 and can be used to monitor the combustion state of the flame in real time, including flame intensity, stability, and pulsation frequency. This facilitates monitoring of the combustion state within the reactor where the process burner is installed, ensuring the normal operation of the combustion process and thus better controlling the partial oxidation process of gaseous fuels.

[0091] Accordingly, this application also provides a reactor including the process burner as described in the above embodiments. Therefore, this reactor incorporates all the technical features and beneficial effects of the process burner, which will not be elaborated upon further in this application.

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

[0093] Please see Figure 3 , Figure 3 This application provides a flowchart of a method for processing gaseous fuel using a process burner, as illustrated in an embodiment of the present application. Accordingly, this application provides a method for processing gaseous fuel using 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] In other words, in the first operating 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 ignites the medium. The second channel 20 and the third channel 30 can also be used to introduce the second medium.

[0096] In some embodiments, the first operating mode includes:

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

[0098] Step S2: After ignition, gradually increase the flow rate of the first fuel and the first medium into the first channel 10 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. 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 satisfy: 1.0≤λ<2.5.

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

[0100] In the second operating 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, the second operating mode includes:

[0102] Step S4: When the temperature inside 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 kept constant, 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 introduced in the first channel 10, that is, the flame formed by the first fuel and the first medium introduced in the first channel 10 ignites the first fuel introduced in 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, the third operating mode includes:

[0105] Step S5: After the second ignition flame stabilizes, cut off the first fuel in the first channel 10, increase the first fuel flow in the fourth channel 40, and adjust the first medium flow in the first channel 10, the second channel 20 and the third channel 30 so that the overall excess air coefficient λ satisfies: λ≤1.0;

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

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

[0108] In some embodiments, in the fourth operating mode, when the temperature inside the reactor where the process burner is installed rises to a second preset temperature, wherein the second preset temperature is greater than the first preset temperature, the fourth channel 40 is used to introduce the second fuel, the second channel 20 is used to introduce the third medium, and the first channel 10 and the third channel 30 are used to introduce the fourth medium. The ratio of the actual supplied mass flow rate of the third medium to the mass flow rate of the third medium required for the complete combustion of the second fuel is defined as the equivalence ratio φ. In the fourth operating mode, this 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 this application, the first to third working modes are the ignition and preheating stages, and the fourth working mode is the process feeding stage.

[0110] Through the above technical solutions, in the first and second working modes, during the ignition preheating stage, in order to prevent the combustion flame from being extinguished due to excessive flow velocity at the burner outlet, the gas flow velocity is gradually increased at the beginning of the ignition preheating stage. Furthermore, to ensure complete combustion during 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 rate of the first fuel, thereby shortening the preheating time of the ignition preheating stage under the condition that the temperature rise rate is permissible, and accelerating the working efficiency of the gaseous fuel partial oxidation process. In the third working mode, the overall excess air coefficient λ satisfies: λ≤1.0, to avoid the third medium content in the reactor being too high when switching to the process feeding stage, causing the second fuel to over-burn, thus preventing the synthesis gas composition generated by the reaction from failing to meet the required synthesis gas composition requirements.

[0111] Based on the reactor installed with the process burner, exemplarily, in some four-channel embodiments, 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. During 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 the natural gas is: CH4: 92.8 vol%, C2H6: 3.8 vol%, C3H8: 1.6 vol%, H2: 0.9 vol%, CO2: 0.9 vol%. The process parameters for different steps in the ignition preheating stage are shown in Table 1. Unless otherwise specified, the media in the second and third channels refer to the first medium, and the media in the fourth channel refer to the first fuel. For example, N2:10 is a special note indicating that the flow rate of the second medium is 10 kg / h. Among them, the maximum flow rate of the first fuel in the fourth channel 40 is 80 kg / h; the maximum flow rate of the first fuel in the first channel 10 is 15 kg / h.

[0112] Table 1

[0113]

[0114] After the temperature inside the reactor is raised to 900℃ during the ignition preheating stage, the process burner is switched to the process feeding stage. Natural gas with the same composition as in the ignition preheating stage at 25℃ is used as the second fuel, with a natural gas flow rate of 4800 kg / h; pure oxygen with a purity of 99.6% at 150℃ is used as the third medium, with a pure oxygen flow rate of 5160 kg / h; equivalence ratio... The ratio is 0.277. Steam at 320℃ is used as the fourth medium, with a steam flow rate of 1560 kg / h; the reactor operating pressure is 3.5 MPaG. Specifically, the fourth medium is introduced through the first channel 10, with an outlet velocity of 8.4 m / s; the third medium is introduced through the second channel 20, with an outlet velocity of 71.8 m / s; the fourth medium is introduced through the third channel 30, with an outlet velocity of 52.8 m / s; and the second fuel is introduced through the fourth channel 40, with an outlet velocity of 69.5 m / s. This generates syngas with a temperature of approximately 1200-1600℃ and a CO+H2 content greater than 85 vol%, which is used as a heat carrier gas for mixing and heat exchange with the downstream cracking feedstock.

[0115] In some other four-channel examples, the first channel 10 is a straight-through structure, meaning the radial distances at all points on the inner wall of the first nozzle are equal. 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. During the ignition preheating stage, coke oven 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 the coke oven gas is: CH4: 21.8 vol%, C2H6: 0.7 vol%, H2: 58.2 vol%, CO: 8.3 vol%, CO2: 6.5 vol%, N2: 4.5 vol%. The process parameters for different steps in the ignition preheating stage are shown in Table 2. Unless otherwise specified, the media in the second and third channels refer to the first medium, and the media in the fourth channel refers to the first fuel. Specifically, the maximum flow rate of the first fuel in the fourth channel 40 is 120 kg / h; the maximum flow rate of the first fuel in the first channel 10 is 45 kg / h.

[0116] Table 2

[0117]

[0118] After the temperature inside the reactor is raised to 1350℃ during the ignition preheating stage, the process burner is switched to the process feeding stage. Coke oven gas with the same composition as in the ignition preheating stage at 200℃ is used as the second fuel, with a coke oven gas flow rate of 5400 kg / h. A mixture of 200℃ pure oxygen (99.8% purity) and water vapor is used as the third medium, with a pure oxygen flow rate of 4860 kg / h and a water vapor flow rate of 600 kg / h. The equivalence ratio... The concentration is 0.40, and 350℃ steam is used as the fourth medium, with a steam flow rate of 2070 kg / h; the reactor operating pressure is 4.0 MPaG. Specifically, the fourth medium is introduced into the first channel 10, with an outlet velocity of 9.4 m / s; the third medium is introduced into the second channel 20, with an outlet velocity of 103.3 m / s; the fourth medium is introduced into the third channel 30, with an outlet velocity of 38.4 m / s; and the second fuel is introduced into the fourth channel 40, with an outlet velocity of 104.2 m / s.

[0119] In some other four-channel examples, 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. During 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 the 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 for different steps in the ignition preheating stage are shown in Table 3. Unless otherwise specified, the media in the second and third channels refer to the first medium, and the media in the fourth channel refers to the first fuel. Specifically, 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] After the temperature inside the reactor is raised to 1200℃ during the ignition preheating stage, the process burner is switched to the process feeding stage. Refinery gas with the same composition as in the ignition preheating stage at 180℃ is used as the second fuel, with a flow rate of 6750 kg / h. Pure oxygen with a purity of 99.6% at 220℃ is used as the third medium, with a flow rate of 6650 kg / h. The equivalence ratio... The concentration is 0.325, and CO2 at 80℃ is used as the fourth medium with a CO2 flow rate of 5000 kg / h; the reactor operating pressure is 2.0 MPaG. Specifically, the fourth medium is introduced into the first channel 10, with an outlet velocity of 8.3 m / s; the third medium is introduced into the second channel 20, with an outlet velocity of 142.9 m / s; the fourth medium is introduced into the third channel 30, with an outlet velocity of 53.8 m / s; and the second fuel is introduced into the fourth channel 40, with an outlet velocity of 122.4 m / s.

[0123] Please see Figure 4 , Figure 4 A flowchart illustrating another method for processing gaseous fuel using a process burner, provided in this application embodiment. In some embodiments, this application embodiment provides a method for processing gaseous fuel using a process burner, comprising the following steps:

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

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

[0129] Based on the reactor installed with the process burner, exemplarily, 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. During 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 the 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 for different steps in the ignition preheating stage are shown in Table 4. Unless otherwise specified, the media in the third, fourth, and fifth channels refer to the first medium, and the media in the second channel refer to the first fuel. 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] After the temperature inside the reactor is raised to 1200℃ during the ignition preheating stage, the process burner is switched to the process feeding stage. Refinery gas with the same composition as in the ignition preheating stage at 180℃ is used as the second fuel, with a refinery gas flow rate of 6750 kg / h. Pure oxygen with a purity of 99.6% at 220℃ is used as the third medium, with a pure oxygen flow rate of 6650 kg / h. The equivalence ratio φ is 0.325, and CO2 at 80℃ is used as the fourth medium, with a CO2 flow rate of 5000 kg / h. The reactor operating pressure is 2.0 MPaG. Specifically, the fourth medium is introduced into the first channel 10, and the outlet velocity of the first channel 10 is 5.6 m / s; the second fuel is introduced into the second channel 20, and the outlet velocity of the second channel 20 is 125.9 m / s; the fourth medium is introduced into the third channel 30, and the outlet velocity of the third channel 30 is 20.3 m / s; the third medium is introduced into the fourth channel 40, and the outlet velocity of the fourth channel 40 is 121.2 m / s; and the fourth medium is introduced into the fifth channel 50, and the outlet velocity of the fifth channel 50 is 15.9 m / s.

[0134] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0135] The above provides a detailed description of a process burner, a reactor, and a method for treating gaseous fuels using the process burner. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for treating gaseous fuel with a process burner, characterized in that, For use in process burners, the process burner comprising: The first nozzle (1) has a first channel (10); The 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); The 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); The fourth nozzle (4) 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) is disposed in the first channel (10); At least one of the second channel (20), the third channel (30), the fourth channel (40), and the first channel (10) are used to introduce the first fuel; at least one of the second channel (20), the third channel (30), and the fourth channel (40) is used to introduce the second fuel; The method for treating gaseous fuel with the aforementioned burner includes: 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; 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); 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); In the 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 the second fuel is introduced into the fourth channel (40); The first fuel is a gaseous fuel, used as ignition fuel; the second fuel is a gaseous fuel, used as process fuel; the first medium is an oxidant; the second medium is a non-combustible gas, used as protective gas; the third medium is the main oxidant; and the fourth medium is a non-combustible gas, used as a secondary oxidant.

2. The method for treating gaseous fuel with a process burner according to claim 1, characterized in that, The process burner also includes: The fifth nozzle (5) is sleeved between the third nozzle (3) and the fourth nozzle (4). The outer walls of the fifth nozzle (5) and the third nozzle (3) form a fourth channel (40), and the outer walls of the fourth nozzle (4) and the fifth nozzle (5) form a fifth channel (50).

3. The method for treating gaseous fuel with a process burner according to claim 1, characterized in that, The first nozzle (1) includes a first connecting portion (11) and a first bent portion (12) connected to each other. The first connecting portion (11) extends along the axial direction of the first nozzle (1), and the first bent portion (12) contracts toward the axial direction of the first nozzle (1). The contraction angle of the first bent portion (12) is α, satisfying 0°≤α≤15°; and / or, The second nozzle (2) includes a second connecting portion (22) and a second bend portion (23) connected together. The second connecting portion (22) extends along the axial direction of the second nozzle (2), and the second bend portion (23) contracts toward the axial direction of the second nozzle (2). The contraction angle of the second bend portion (23) is β, satisfying β≥α and 5°≤β≤24°; and / or, The third nozzle (3) includes a third connecting part (32) and a third bend (33) connected together. The third connecting part (32) extends along the axial direction of the third nozzle (3), and the third bend (33) contracts toward the axial direction of the third nozzle (3). The contraction angle of the third bend (33) is γ, which satisfies γ≥β and 10°≤γ≤30°; and / or, The fourth nozzle (4) includes a fourth connecting part (42) and a fourth bending part (43) connected to each other. The fourth connecting part (42) extends along the axial direction of the fourth nozzle (4). The fourth bending part (43) contracts toward the axial direction of the fourth nozzle (4). The contraction angle of the fourth bending part (43) is δ, which satisfies δ≥γ and 20°≤δ≤45°.

4. The method for treating gaseous fuel with a process burner according to claim 2, characterized in that, The first nozzle (1) includes a first connecting portion (11) and a first bent portion (12) connected to each other. The first connecting portion (11) extends along the axial direction of the first nozzle (1), and the first bent portion (12) contracts toward the axial direction of the first nozzle (1). The contraction angle of the first bent portion (12) is α, satisfying 0°≤α≤15°; and / or, The second nozzle (2) includes a second connecting portion (22) and a second bend portion (23) connected together. The second connecting portion (22) extends along the axial direction of the second nozzle (2), and the second bend portion (23) contracts toward the axial direction of the second nozzle (2). The contraction angle of the second bend portion (23) is β, satisfying β≥α and 5°≤β≤24°; and / or, The third nozzle (3) includes a third connecting part (32) and a third bend (33) connected together. The third connecting part (32) extends along the axial direction of the third nozzle (3), and the third bend (33) contracts toward the axial direction of the third nozzle (3). The contraction angle of the third bend (33) is γ, which satisfies γ≥β and 10°≤γ≤30°; and / or, The fifth nozzle (5) includes a fifth connecting portion (52) and a fifth bend portion (53) connected together. The fifth connecting portion (52) extends along the axial direction of the fifth nozzle (5), and the fifth bend portion (53) contracts toward the axial direction of the fifth nozzle (5). The contraction angle of the fifth bend portion (53) is ε, which satisfies ε≥γ and 20°≤ε≤45°; and / or, The fourth nozzle (4) includes a fourth connecting part (42) and a fourth bending part (43) connected to each other. The fourth connecting part (42) extends along the axial direction of the fourth nozzle (4). The fourth bending part (43) contracts toward the axial direction of the fourth nozzle (4). The contraction angle of the fourth bending part (43) is δ, which satisfies δ≥ε and 30°≤δ≤60°.

5. The method for treating gaseous fuel with a process burner according to claim 1, characterized in that, The radial length of the inner wall of the first nozzle (1) is equal at all positions on the same axis.

6. The method for treating gaseous fuel with a process burner according to claim 2, characterized in that, The process burner also includes: Multiple first positioning blocks (21) are located within the second channel (20) and spaced apart on the side of the first nozzle (1) facing the second nozzle (2); and / or, Multiple second positioning blocks (31) are located within the third channel (30) and spaced apart on the side of the second nozzle (2) facing the third nozzle (3); and / or, Multiple third positioning blocks (41) are located within the fourth channel (40) and spaced apart on the side of the third nozzle (3) facing the fourth nozzle (4); and / or, Multiple fourth positioning blocks (51) are located within the fifth channel (50) and spaced apart on the side of the fourth nozzle (4) facing the fifth nozzle (5).

7. The method for treating gaseous fuel with a process burner according to claim 6, characterized in that, The first positioning block (21) includes a first swirl vane, which abuts against the inner wall of the second channel (20); The second positioning block (31) includes a second swirl vane, which abuts against the inner wall of the third channel (30); The third positioning block (41) includes a third swirl vane, which abuts against the inner wall of the fourth channel (40); The fourth positioning block (51) includes a fourth swirl vane, which abuts against the inner wall of the fifth channel (50).

8. The method for treating gaseous fuel with a 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 second fuel and the second medium.

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

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

12. The method for treating gaseous fuel with a process burner according to claim 1, characterized in that, The fourth nozzle (4) has a cavity configured to allow the passage of a cooling medium.

13. The method for treating gaseous fuel with a process burner according to claim 1, characterized in that, Also includes: A flame detection device (7) is installed in the first channel (10).

14. A reactor, characterized in that, A method for processing gaseous fuels using a process burner as described in any one of claims 1 to 13.

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