A combined burner cooling cover device

Abstract

The present disclosure provides a combined burner cooling shroud device, comprising: a burner shroud, an intermediate water-cooled wall, and a furnace water-cooled wall sequentially arranged around the burner from the inside to the outside; the burner shroud is configured as a hollow structure in the form of a coil to form a burner shroud cooling channel; the intermediate water-cooled wall is configured as a hollow structure in the form of a coil to form an intermediate water-cooled wall cooling channel; the burner shroud cooling channel and the intermediate water-cooled wall cooling channel are nested with each other from the inside to the outside; the burner passes through the burner shroud cooling channel; the furnace shell of the gasifier is provided with a burner installation pipe orifice, and the furnace shell encloses an accommodation space; the furnace water-cooled wall is arranged in the accommodation space; the furnace water-cooled wall is provided with a through hole opposite to the burner installation pipe orifice; the combined burner cooling shroud device is connected to the furnace shell through an installation method of sequentially passing through the burner installation pipe orifice and the through hole; the embodiments of the present disclosure can strengthen the cooling effect around the burner shroud, extend the service life of the burner shroud, are convenient for replacement and maintenance, and can achieve replacement outside the furnace.

Description

Technical Field

[0001] The invention belongs to the technical field of coal gasification, and in particular relates to a combined burner cooling cover device. Background Art

[0002] Entrained-bed gasification technology is an important method for gasifying carbon-containing materials. Fuel and gasifying agent are introduced into the gasifier at a certain speed through a nozzle. After being fully mixed, an incomplete combustion reaction occurs, and the temperature is generally above 1400°C. Due to the high-speed jet entrainment of the burner, the temperature near the burner is extremely high. If the end of the burner is not cooled enough, the thermal stress is too high, which can easily cause the burner head to burn. The existing technology usually designs a burner cooling cover outside the burner to provide a cooling channel for the burner, which plays a role in protecting the burner and shaping the flame.

[0003] The working environment near the burner is harsh. Metal fatigue and overheating caused by factors such as complex crude syngas composition, high-speed jet entrainment effect of burner fluid, and slag adhesion to the burner hood affecting the flame shape and causing flame deviation make the burner hood and the surrounding furnace water-cooled walls susceptible to high heat flux and metal surface corrosion, resulting in damage.

[0004] As a burner accessory, the burner cover is a consumable part. In order to extend the service life of the burner cover, the existing technology usually improves the layout of the burner cover water cooling pipe or adopts internal threaded pipes to enhance the heat exchange effect, and reduces metal corrosion by means of material optimization. Through these technologies, although the performance of the burner cover has been improved, the furnace water-cooled wall in the area near the burner cover is still facing a severe working environment, and the furnace water-cooled wall is generally formed in one piece. Once burned, it can only be repaired in the furnace, and it is necessary to complete the cumbersome furnace maintenance preparation work in advance, and the maintenance cycle is generally long. In order to protect the furnace water-cooled wall near the burner, there is also a related technology that increases the protection area of ​​the burner cover and covers the furnace water-cooled wall near the burner cover. However, although this solution reduces the risk of burning of the furnace water-cooled wall around the burner, it brings inconvenience to the replacement of the burner cover, that is, the burner cover can only be replaced inside the furnace of the gasifier.

[0005] Due to factors such as the entrainment of the burner fluid jet, the temperature near the burner is high and the metal wall is subjected to a high heat load. The prior art usually designs a burner cover to protect the burner and control the flame shape. However, the working environment of the burner cover is harsh and is easily damaged by high heat flux and surface corrosion. At the same time, the furnace water-cooled wall around the burner cover is also subjected to a severe working environment.

[0006] As a consumable part, the existing technology mainly focuses on extending the service life of the burner shroud. However, although the service life of the burner shroud has been extended, the working environment of the furnace water-cooled wall around it has not been improved. Once the furnace water-cooled wall is damaged by burning, it is only possible to enter the interior of the gasifier furnace for maintenance. There are also technologies that consider improving the burner shroud to cover the furnace water-cooled wall around it, but these improvements inevitably face the problem of difficult maintenance, that is, it is only possible to enter the interior of the gasifier furnace to replace the burner shroud.

[0007] Therefore, in the face of the existing technical difficulties, while extending the service life of the burner shroud, it is also necessary to consider the convenience of replacement and maintenance, and reduce the shutdown maintenance period. Summary of the Invention

[0008] In view of the above problems existing in the prior art, the present disclosure provides a combined burner cooling shroud device that is convenient for replacement and maintenance and can extend the service life of the burner shroud.

[0009] To achieve the above object, the technical solution adopted in the embodiments of the present invention is:

[0010] A combined burner cooling shroud device includes: a burner shroud, an intermediate water-cooled wall, and a furnace water-cooled wall that are sequentially arranged around the burner from the inside to the outside; wherein, the burner shroud is constructed as a hollow structure in the form of a coil to form a burner shroud cooling channel; the intermediate water-cooled wall is constructed as a hollow structure in the form of a coil to form an intermediate water-cooled wall cooling channel; the burner shroud cooling channel and the intermediate water-cooled wall cooling channel are nested with each other from the inside to the outside, and the burner passes through the burner shroud cooling channel; the furnace shell of the gasifier is provided with a burner installation pipe orifice, and the furnace shell encloses an accommodation space; the accommodation space water-cooled wall is arranged in the accommodation space; the furnace water-cooled wall is provided with a through hole opposite to the burner installation pipe orifice; the combined burner cooling shroud device is connected to the furnace shell through an installation method that sequentially passes through the burner installation pipe orifice and the through hole.

[0011] In some disclosed embodiments, the combined burner cooling shroud device further includes a connection pipe flange and a burner connection pipe that are detachably connected to each other; wherein, the burner connection pipe is connected to the furnace shell along the periphery of the burner installation pipe orifice; the connection pipe flange is detachably connected to the furnace shell through the burner connection pipe; the burner is guided into the burner installation pipe orifice through the connection pipe flange.

[0012] In some disclosed embodiments, the burner shroud includes at least one burner shroud cold water pipe and a burner shroud cold water connection pipe that are communicated with each other and are correspondingly arranged on both sides of the connection pipe flange; both ends of the burner shroud cold water pipe are detachably connected to the connection pipe flange; the burner shroud cold water connection pipe is connected to the furnace shell.

[0013] In some disclosed embodiments, the burner shroud is configured as a coil structure by helically winding the burner shroud cold water pipe, and encloses the burner shroud cooling channel; one end of the burner shroud cooling channel in the opening direction towards the accommodating space is configured as a double-layer structure.

[0014] In some disclosed embodiments, the burner shroud cooling channel is configured as a "horn" shape in the direction towards the accommodating space.

[0015] In some disclosed embodiments, the intermediate water wall includes at least one intermediate water wall cold water pipe and an intermediate water wall cold water connection pipe that communicate with each other and are correspondingly arranged on both sides of the furnace shell; the intermediate water wall cold water pipe is helically wound around the outer periphery of the burner shroud cooling channel to be configured as a coil structure, and encloses the intermediate water wall cooling channel.

[0016] In some disclosed embodiments, the outer surface of the burner shroud has peak portions and valley portions arranged at intervals formed by its coil structure; the inner surface of the intermediate water wall has peak portions and valley portions arranged at intervals formed by its coil structure; the peak portions of the burner shroud are in abutment with the valley portions of the intermediate water wall portion.

[0017] In some disclosed embodiments, the combined burner cooling shroud device further includes a burner flange; the burner flange is detachably connected to the burner and the connection flange respectively.

[0018] In some disclosed embodiments, the connection flange is provided with through holes corresponding to the burner shroud cold water pipes; both ends of the burner shroud cold water pipes respectively pass through the through holes, and the furnace shell is detachably connected through the connection flange.

[0019] In some disclosed embodiments, the burner shroud and the connection flange are integrally formed.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] A combined burner cooling shroud device of the present invention, through the burner shroud and the intermediate water wall, not only plays a role in cooling the head of the burner and controlling the flame shape, but also can avoid flame deflection. In addition, it can also strengthen the cooling effect around the burner shroud. At the same time, the burner shroud and the intermediate water wall can be independently monitored and replaced, and the function of replacing outside the furnace can be realized.

[0022] In addition, the combined burner cooling shroud device of the present invention also overcomes the problems in the prior art that the burner shroud has a complex structure, the furnace water wall around the burner shroud is easily burned out, and it is difficult to repair after being burned out, provides strong support for the long-term stable operation of the gasifier, greatly reduces the maintenance period, and reduces the economic losses caused by shutdown. Description of the Drawings

[0023] Figure 1 This is a schematic structural view of the combined burner cooling shroud device according to an embodiment of the present invention;

[0024] Figure 2 This is a partial structural view of the combined burner cooling shroud device according to an embodiment of the present invention;

[0025] Figure 3 This is a partial structural view of the combined burner cooling shroud device according to an embodiment of the present invention.

[0026] Explanation of reference numerals

[0027] 1 - Burner shroud; 2 - Intermediate water-cooled wall; 3 - Furnace water-cooled wall; 4 - Furnace shell;

[0028] 5 - Burner connection pipe; 6 - Connection flange; 7 - Cold water connection pipe for burner shroud; 8 - Burner;

[0029] 9 - Burner flange; 10 - Cold water connection pipe for intermediate water-cooled wall; 11 - Cold water pipe for burner shroud;

[0030] 12 - Cold water pipe for intermediate water-cooled wall; 13 - Peak part; 14 - Valley part; 15 - Burner installation pipe orifice;

[0031] 16 - Through hole Detailed implementation manners

[0032] Next, specific embodiments of the present invention will be described in detail with reference to the drawings, but it is not a limitation of the present invention. To enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail below with reference to the drawings and specific implementation manners. Next, the embodiments of the present disclosure will be further described in detail with reference to the drawings and specific embodiments, but it is not a limitation of the present disclosure.

[0033] All terms (including technical terms or scientific terms) used in the present disclosure have the same meaning as understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0034] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the specification.

[0035] The terms "nozzle connection" and "furnace chamber" used in the present invention have the following meanings respectively; among them, "nozzle connection" is defined based on the specific application scenario of the present invention, that is, the structure is more robust and reliable compared to the ordinary "pipe" structure. The purpose of this setting is to meet the safety requirements in high-risk application scenarios. The "furnace chamber" is surrounded by the "furnace water wall 3", and it is arranged in the "accommodation space" surrounded by the furnace shell. The "furnace chamber" and the "accommodation space" are nested with each other. In addition, it should be noted that in this embodiment, the "accommodation space" has a cylindrical structure.

[0036] Due to problems such as complex structure of the burner shroud 1 in the prior art, easy burning damage of the furnace water wall 3 around the burner shroud 1, and difficult maintenance after burning damage; in order to extend the service life of the burner shroud 1 while fully considering the convenience of replacement and maintenance and reducing the shutdown maintenance period. For this reason, the present invention provides the following design solutions.

[0037] See Figure 1 , an embodiment of the present invention provides a combined burner cooling shroud device, including: a burner shroud 1, an intermediate water wall 2, and a furnace water wall 3 that are sequentially arranged around the burner 8 from the inside to the outside; among them, the burner shroud 1 is constructed as a hollow structure in the form of a coiled pipe to form a burner shroud cooling channel; the intermediate water wall 2 is constructed as a hollow structure in the form of a coiled pipe to form an intermediate water wall cooling channel; the burner shroud cooling channel and the intermediate water wall cooling channel are nested with each other from the inside to the outside, and the burner 8 passes through the burner shroud cooling channel; the furnace shell 4 of the gasifier is provided with a burner installation pipe orifice 15, and the furnace shell 4 encloses an accommodation space; the furnace water wall 3 is arranged in the accommodation space; the furnace water wall 3 is provided with a through hole 16 opposite to the burner installation pipe orifice 15; the combined burner cooling shroud device is connected to the furnace shell 4 through an installation method that sequentially passes through the burner installation pipe orifice 15 and the through hole 16.

[0038] The designed structure in the above manner not only provides an effective and rapid cooling channel for the burner 8, but also plays the role of cooling the head of the burner 8 and controlling the flame shape. In addition, it also strengthens the cooling effect around the burner shroud 1.

[0039] In this embodiment, preferably, the furnace water wall 3 is laid along the axial direction of the accommodation space, so that the furnace water wall 3 is constructed as a cavity approximately in the shape of a cylinder (or called: furnace chamber, the same below) for the furnace space for fuel combustion, that is, the combustion chamber. Preferably, the cavity formed by the furnace water wall 3 is coaxially arranged with the accommodation space. Preferably, a gap is provided between the furnace shell 4 and the furnace water wall 3 to provide an ideal cooling effect and effectively protect the shell from being quickly damaged in a harsh working environment.

[0040] In one embodiment, see Figure 1, the combined burner cooling shroud device further includes a nozzle connection flange 6 and a burner nozzle 5 that are detachably connected to each other; wherein, the burner nozzle 5 is connected to the furnace shell 4 along the periphery of the burner installation nozzle 15; the nozzle connection flange 6 is detachably connected to the furnace shell 4 through the burner nozzle 5; the burner 8 extends into the burner installation nozzle 15 through the nozzle connection flange 6. In this embodiment, by disassembling the nozzle connection flange 6, after the burner installation nozzle 15 is opened, the internal condition of the furnace shell 4 can be observed through the burner installation nozzle 15, and the components arranged in the furnace shell 4, such as the burner shroud 1 or the intermediate water-cooled wall 2, can be removed through the burner installation nozzle 15, which provides convenience for the maintenance and related operations of the gasifier. The size and specific shape of the burner installation nozzle 15 can be selected according to the actual application scenario and will not be further limited herein.

[0041] In this embodiment, the following beneficial effects can also be brought about by this design solution. For example, once the burner shroud 1 or the intermediate water-cooled wall 2 is damaged, the burner shroud 1 or the intermediate water-cooled wall 2 can be removed from the gasifier through the burner nozzle 5 and through the burner installation nozzle 15, without the need to enter the gasifier for operation. Thus, the maintenance workload and complexity are greatly reduced, and the cumbersome work such as building a scaffold inside the furnace is eliminated, making the maintenance process convenient, efficient, and fast.

[0042] In one embodiment, in combination with Figure 1 and Figure 2 , the burner shroud 1 includes at least one burner shroud cold water pipe 11 and a burner shroud cold water connection pipe 7 that are communicated with each other and are correspondingly arranged on both sides of the nozzle connection flange 6; both ends of the burner shroud cold water pipe 11 are detachably connected to the nozzle connection flange 6; the burner shroud cold water connection pipe 7 is connected to the furnace shell 4.

[0043] In one embodiment, in combination with Figure 1 and Figure 2 , the burner shroud 1 is configured as a coil structure by spirally winding the burner shroud cold water pipe 11 and encloses the burner shroud cooling channel; one end of the burner shroud cooling channel in the opening direction towards the accommodation space is configured as a double-layer structure. In this embodiment, the burner shroud cooling channel can effectively increase the heat exchange area and improve the heat exchange efficiency. In addition, by adopting forced circulation cooling water, the heat transfer effect can be effectively enhanced. Further, in this embodiment, in combination with the burner shroud 1 being configured as a hollow structure by spirally winding the burner shroud cold water pipe 11 in a coil manner, and on this basis, an additional layer is added at one end of the burner shroud cooling channel in the opening direction towards the accommodation space. Considering that the heat dissipation efficiency of metal is higher than that of the fluid medium, therefore, on the basis of the original layer, the heat dissipation effect can be further improved to ensure the safety of the burner 8 during the combustion process.

[0044] In one embodiment, referring to Figure 1, the cooling channel of the burner shroud is configured in a "horn" shape in the direction towards the accommodation space. Through this setting method, the shape of the flame ejected by the burner 8 can be effectively controlled, making the incomplete combustion reaction more sufficient and meeting the reaction requirements in the gasifier.

[0045] In one embodiment, in combination with Figure 1 and Figure 3 , the intermediate water-cooled wall 2 includes at least one intermediate water-cooled wall cold water pipe 12 and an intermediate water-cooled wall cold water connection pipe 10 that are connected to each other and correspondingly arranged on both sides of the furnace shell 4; the intermediate water-cooled wall cold water pipe 12 is spirally wound around the outer periphery of the cooling channel of the burner shroud to form a coil structure and encloses the intermediate water-cooled wall cooling channel. In this embodiment, the intermediate water-cooled wall 2 is configured as a hollow structure by the intermediate water-cooled wall cold water pipe 12 in a way of spirally winding to form a coil, effectively increasing the heat exchange area and improving the heat exchange efficiency. On the basis of providing cooling safety protection for the aforementioned burner shroud 1, it further increases the heat exchange area, improves the heat exchange efficiency, and improves the reliability of the safety protection of the burner shroud 1. In this embodiment, preferably, the flow rate of the cooling medium in the intermediate water-cooled wall cold water pipe 12 can be set higher than that of the furnace water-cooled wall 3. Thus, a better heat exchange effect can be achieved, the probability of burnout can be reduced, and the operation cycle of the gasifier can be extended.

[0046] In this embodiment, in order to improve the reliability of safe operation, preferably, the burner shroud 1 and the intermediate water-cooled wall 2 are respectively used as independent cooling components, and the cooling media between them are isolated from each other, and through their synergistic effects, an ideal cooling effect is exerted. Since the burner shroud 1 and the intermediate water-cooled wall 2 are independent components in this embodiment, during the operation of the gasifier, the flow rate, temperature, pressure and other parameters of the cooling media of the burner shroud 1 and the intermediate water-cooled wall 2 can be monitored to timely and accurately obtain their respective operating states.

[0047] In one embodiment, in combination with Figures 1 to 3 , the outer surface of the burner shroud 1 has peak portions 13 and valley portions 14 arranged at intervals formed by its coil structure; the inner surface of the intermediate water-cooled wall 2 has peak portions 13 and valley portions 14 arranged at intervals formed by its coil structure; the peak portion 13 of the burner shroud 1 abuts against the valley portion 14 of the intermediate water-cooled portion. In this embodiment, through this setting method, the reaction medium in the furnace can be effectively prevented from escaping from the intervals, thereby avoiding possible unpredictable safety risks to the outside due to the high-temperature characteristics of the reaction medium. In addition, through this setting method, the violent change of the reaction temperature in the furnace caused by the escape of the high-temperature reaction medium can also be avoided, thereby ensuring that the reaction conditions in the furnace always remain relatively stable.

[0048] In one embodiment, see Figure 1, the combined burner cooling shroud device further includes a burner flange 9; the burner flange 9 is detachably connected to the burner 8 and the connecting pipe flange 6 respectively, so that the burner 8 is connected to the connecting pipe flange 6 through the burner flange 9, and further through the connection relationship with the burner connecting pipe 5, so as to smoothly extend into the accommodation space.

[0049] In one embodiment, the connecting pipe flange 6 is provided with through holes (not shown in the figure) corresponding to the burner shroud cooling water pipes 11; both ends of the burner shroud cooling water pipes 11 pass through the through holes respectively, and are detachably connected to the furnace shell 4 through the connecting pipe flange 6, thereby realizing quick disassembly and improving the efficiency of maintenance and repair.

[0050] In one embodiment, the burner shroud 1 and the connecting pipe flange 6 are integrally formed. By this setting method, it can be disassembled and inspected at any time when the gasifier stops. Especially after removing the burner shroud 1, it is possible to penetrate through the channel surrounded by the burner connecting pipe 5 and the burner installation pipe orifice 15 to inspect the state of the intermediate water-cooled wall 2.

[0051] In addition, although illustrative embodiments are described herein, the scope includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., combinations of solutions across various embodiments), adaptations or variations based on the present disclosure. The elements in the claims will be broadly interpreted based on the language used in the claims and not limited to the examples described in this specification or during the pendency of this application. Moreover, the steps of the disclosed methods can be modified in any way, including by reordering steps or inserting or deleting steps. Therefore, the intention is merely to regard the description as examples, and the true scope is represented by the following claims and their full scope of equivalents.

[0052] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more aspects thereof) can be used in combination with each other. After reading the above description, for example, those of ordinary skill in the art can use other embodiments. Moreover, in the above detailed description, various features can be combined together to simplify the present disclosure. This should not be construed as intending that the disclosed features not claimed are essential to any claim. Therefore, the following claims are incorporated into the specific embodiments as examples or embodiments, where each claim is a separate embodiment in itself, and it is contemplated that these embodiments can be combined with each other in various combinations or permutations. The scope of the present invention should be determined with reference to the appended claims and the full scope of equivalents given by these claims.

Claims

1. A combined burner cooling hood device, characterized in that, Comprising: A burner shroud, an intermediate water-cooled wall, and a furnace water-cooled wall that are sequentially arranged around the burner from the inside to the outside; wherein, The burner shroud is constructed as a hollow structure in the form of a coiled pipe to form a burner shroud cooling channel; the intermediate water-cooled wall is constructed as a hollow structure in the form of a coiled pipe to form an intermediate water-cooled wall cooling channel; the burner shroud cooling channel and the intermediate water-cooled wall cooling channel are nested with each other from the inside to the outside; the burner passes through the burner shroud cooling channel; The furnace shell of the gasifier is provided with a burner installation pipe orifice, and the furnace shell encloses an accommodation space; the furnace water-cooled wall is arranged in the accommodation space; the furnace water-cooled wall is provided with a through hole opposite to the burner installation pipe orifice; The combined burner cooling shroud device is connected to the furnace shell through an installation method of sequentially passing through the burner installation pipe orifice and the through hole; The burner shroud cooling channel is constructed in a "horn" shape in the direction towards the accommodation space; The intermediate water-cooled wall includes at least one intermediate water-cooled wall cold water pipe and an intermediate water-cooled wall cold water connection pipe that are communicated with each other and correspondingly arranged on both sides of the furnace shell; the intermediate water-cooled wall cold water pipe is spirally wound around the outer periphery of the burner shroud cooling channel to be constructed as a coiled pipe structure and encloses the intermediate water-cooled wall cooling channel.

2. The combined burner cooling shroud device according to claim 1, wherein, It further includes a connection flange and a burner connection pipe that are detachably connected to each other; wherein, The burner connection pipe is connected to the furnace shell along the periphery of the burner installation pipe orifice; the connection flange is detachably connected to the furnace shell through the burner connection pipe; The burner is guided into the burner installation pipe orifice through the connection flange.

3. The combined burner cooling hood device according to claim 2, characterized in that, The burner shroud includes at least one burner shroud cold water pipe and a burner shroud cold water connection pipe that are communicated with each other and correspondingly arranged on both sides of the connection flange; both ends of the burner shroud cold water pipe are detachably connected to the connection flange; the burner shroud cold water connection pipe is connected to the furnace shell.

4. The combined burner cooling shroud device according to claim 3, characterized in that, The burner shroud is constructed as a coiled pipe structure by spirally winding the burner shroud cold water pipe and encloses the burner shroud cooling channel; one end of the burner shroud cooling channel in the opening direction towards the accommodation space is constructed as a double-layer structure.

5. The combined burner cooling shroud device according to claim 1, wherein, The outer surface of the burner shroud has peak portions and valley portions arranged at intervals formed by its coiled pipe structure; The inner surface of the intermediate water-cooled wall has peak portions and valley portions arranged at intervals formed by its coiled pipe structure; The peak portions of the burner shroud are in contact with the valley portions of the intermediate water-cooled wall.

6. The combined burner cooling shroud device according to claim 2, characterized in that, It further includes a burner flange; the burner flange is respectively detachably connected to the burner and the connection flange.

7. The combined burner cooling cover device according to claim 3, characterized in that, The connection flange is provided with through holes corresponding to the burner shroud cold water pipes; both ends of the burner shroud cold water pipes respectively pass through the through holes and are detachably connected to the furnace shell through the connection flange.

8. The combined burner cooling hood device according to claim 7, characterized in that, The burner shroud and the connection flange are integrally formed.

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