Thermal insulation structure for partial oxidation furnace burner and partial oxidation furnace
By setting a combination structure of refractory insulation ring and ceramic fiber felt layer at the bottom of the burner of the partial oxidation furnace, the problem of ceramic fiber felt burning and falling off in high temperature environment is solved, and long-term sealing and heat insulation protection is achieved to ensure safe operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BASF INTEGRATED SITE (GUANGDONG) CO LTD
- Filing Date
- 2026-03-17
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, the lower end of the ceramic fiber felt of some oxidizer burners is directly exposed to a high-temperature environment, leading to burn-off and detachment, which affects the safe operation and service life of the equipment.
A refractory insulation ring is installed at the bottom of the burner. The bottom of the burner is covered by an insulation ring formed by refractory materials such as refractory cement and fixed by anchors. Combined with the ceramic fiber felt layer, it forms an effective heat insulation protection, avoiding direct welding of fasteners.
It effectively protects the lower part of the burner from high-temperature damage, prevents the ceramic fiber felt from slipping off, ensures a long-lasting sealing and heat insulation effect, avoids high-temperature airflow from reaching the burner root, and ensures the safe and stable operation of the equipment.
Smart Images
Figure CN224467731U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coal chemical equipment technology, specifically to an insulation structure for a burner in a partial oxidation furnace and a partial oxidation furnace. Background Technology
[0002] Partial oxidation furnaces are core equipment in the coal chemical industry. Their burners operate in a high-temperature environment, with furnace temperatures reaching approximately 1450℃. To protect the flanges at the burner base from high-temperature damage, an insulation layer needs to be installed between the burner and the mounting hole on the furnace top.
[0003] In existing technologies, the thermal insulation layer of burners is usually achieved by wrapping ceramic fiber felt. Specifically, nail-shaped fasteners are welded to the 316 stainless steel portion of the burner, and then ceramic fiber felt is wrapped around the burner, allowing the nail-shaped fasteners to be embedded within the felt for fixation.
[0004] However, the upper part of the burner is made of materials such as 316 stainless steel, which is weldable but has poor heat resistance; the lower part (burner head) is made of materials such as Inconel 600 alloy, which has good heat resistance but cannot be welded to fasteners in the conventional way. Therefore, existing technology can only make the ceramic fiber felt longer, fix it to the upper 316 steel area, and then extend downwards to cover the Inconel 600 alloy part. This results in the lower end of the ceramic fiber felt being directly exposed to the high temperature environment of about 1450°C inside the furnace.
[0005] Prolonged exposure to high temperatures will cause the ceramic fiber felt to gradually burn off and fall into the furnace. As the ceramic fiber felt is worn down, the gap between the burner and the burner mounting hole gradually increases. The high-temperature airflow in the furnace passes through this gap and directly acts on the flange at the base of the burner, causing the flange to deform or even crack due to heat, which seriously affects the safe operation and service life of the equipment. Utility Model Content
[0006] The main objective of this application is to provide an insulation structure for burners in partial oxidation furnaces, in order to solve the problem of burn-out and detachment of the lower end of the ceramic fiber felt in the prior art due to direct exposure to high temperature environment.
[0007] This application proposes a heat insulation structure for a burner in a partial oxidation furnace, the burner comprising an upper part and a lower part connected to the upper part, characterized in that the heat insulation structure comprises: a refractory heat insulation ring disposed on the outer peripheral surface of the upper part of the burner, extending toward the lower part of the burner and covering at least a portion of the outer peripheral surface of the lower part of the burner; and a ceramic fiber felt layer disposed on the outer peripheral surface of the upper part of the burner, and located along the axial direction of the burner on the side of the refractory heat insulation ring away from the lower part of the burner.
[0008] According to an optional embodiment, the insulation structure further includes anchors; the anchors are fixed to the outer peripheral surface of the upper part of the burner; and the refractory insulation ring is formed by casting and covers the anchors.
[0009] According to an optional implementation, the anchors are evenly distributed circumferentially along the upper part of the burner.
[0010] According to an optional implementation, the anchor is a Y-shaped nail, a T-shaped nail, or an L-shaped nail.
[0011] According to an optional embodiment, the refractory insulation ring is formed by casting refractory cement with a temperature resistance of not less than 1600°C.
[0012] According to an optional embodiment, the ceramic fiber felt layer abuts against the end face of the refractory insulation ring; and the ceramic fiber felt layer and the refractory insulation ring are non-adhesively connected.
[0013] According to an optional embodiment, the ceramic fiber felt layer is formed by wrapping ceramic fiber felt layers around the outer peripheral surface of the upper part of the burner.
[0014] This application also proposes a partial oxidation furnace, characterized in that it comprises: a furnace body; a partial oxidation furnace burner disposed on the furnace body; and an insulation structure disposed on the partial oxidation furnace burner; wherein the furnace body has a burner mounting hole at the top center position; the partial oxidation furnace burner passes through the burner mounting hole; and the refractory material insulation ring and ceramic fiber felt layer of the insulation structure fill the gap between the partial oxidation furnace burner and the burner mounting hole.
[0015] According to an optional embodiment, the outer diameter of the ceramic fiber felt layer in its free state is larger than the inner diameter of the burner mounting hole, causing the ceramic fiber felt layer to be under pressure within the gap between the upper part of the burner and the wall of the burner mounting hole. In an optional embodiment, before installing the burner into the burner mounting hole, the ceramic fiber felt layer is compressed and wrapped with a combustible wrapping material (e.g., combustible tape or binding tape) to a size smaller than the inner diameter of the burner mounting hole. After partial oxidation furnace ignition, the combustible wrapping material burns, releasing the compressed ceramic fiber felt layer into a free state to fill the inner diameter of the burner mounting hole, thereby maximizing the isolation of the burner flange from the high-temperature gas flow.
[0016] According to an optional embodiment, the partial oxidation furnace burner includes an upper burner portion and a lower burner portion connected to the upper burner portion; the upper burner portion is made of stainless steel; and the lower burner portion is made of a nickel-based superalloy.
[0017] By installing a refractory insulation ring at the bottom of the burner, and utilizing the high temperature resistance (not less than 1600℃) of refractory materials (such as refractory cement), the insulation structure for burners in this application can withstand the high-temperature environment inside the furnace for a long time without being easily damaged, solving the problem of traditional ceramic fiber felt easily burning off at the burner head. The refractory insulation ring is fixed by anchors covering and fixing the upper part of the burner, and extends downward to cover the lower part of the burner. This structure avoids the difficulty of directly welding fasteners to the difficult-to-weld material at the bottom of the burner, while achieving effective insulation protection for the lower part of the burner. The refractory insulation ring is located below the ceramic fiber felt layer, forming a support platform to support the weight of the upper ceramic fiber felt layer and prevent it from sliding down during long-term use; on the other hand, the refractory insulation ring acts as a barrier to prevent the high-temperature airflow inside the furnace from directly scouring the ceramic fiber felt layer and reduces the cross-section of the airflow channel, thereby effectively protecting the ceramic fiber felt layer and improving the reliability of the overall sealing structure.
[0018] The insulation structure for the burner of the partial oxidation furnace described in this application can ensure a long-lasting sealing and heat insulation effect, effectively prevent high-temperature airflow from reaching the burner root, avoid the burner flange from deforming or cracking due to overheating, and ensure the safe and stable operation of the partial oxidation furnace. Attached Figure Description
[0019] In the following description, embodiments of the invention will be described in more detail with reference to the accompanying drawings, wherein:
[0020] Figure 1 This is a schematic diagram of a partial oxidation furnace according to this application.
[0021] Figure 2 yes Figure 1 A partially enlarged schematic diagram of a partial oxidation furnace shows the partial oxidation furnace burner and the insulation structure for the partial oxidation furnace burner according to this application.
[0022] It should be understood that the accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Detailed Implementation
[0023] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0024] Figure 1 This is a schematic diagram of a partial oxidation furnace according to this application. For example... Figure 1As shown, the partial oxidizer includes a furnace body 10 and partial oxidizer burners 20. The furnace body 10 is a vertical cylindrical pressure vessel. The furnace body 10 includes a pressure-resistant steel outer shell 101. A refractory lining 102 is provided on the inner wall of the pressure-resistant steel outer shell 101. The refractory lining 102 can be composed of multiple layers, from the outside to the inside: an insulation layer, a backing layer, and a fire-facing layer. The fire-facing layer can be made of high-chromium brick to resist the erosion of high-temperature molten slag. The upper part of the furnace body 10 internally defines a gasification reaction space. A burner mounting hole 103 is provided at the center of the top of the furnace body 10 for mounting the partial oxidizer burners 20.
[0025] Figure 2 yes Figure 1 A partially enlarged schematic diagram of a partial oxidation furnace shows the burner of the partial oxidation furnace and the insulation structure for the burner according to this application. Figure 2 As shown, the partial oxidation furnace burner 20 includes an upper burner portion 201 and a lower burner portion 202. The upper burner portion 201 can be made of stainless steel (e.g., 316 stainless steel), and the lower burner portion 202 can be made of a nickel-based superalloy (e.g., Inconel 600 alloy). The area where the upper burner portion 201 connects to the lower burner portion 202 forms a connecting portion 203. A flange 204 is provided at the top of the upper burner portion 201 for fixing the partial oxidation furnace burner 20 into the burner mounting hole 103 of the furnace body 10. Specifically, the upper burner portion 201 is made of stainless steel because this area is located inside the burner mounting hole 103, where the heat load is relatively low, and stainless steel has excellent weldability, machinability, and cost-effectiveness, making it easy to weld and fix anchors 301 (see description below) on its surface to support the refractory insulation ring 302. The lower part 202 of the burner is made of nickel-based high-temperature alloy because this part is close to the high-temperature reaction zone (temperature of about 1450℃) of the furnace body 10. Nickel-based high-temperature alloy has excellent high-temperature strength, oxidation resistance and corrosion resistance, and can resist oxidation spalling and thermal stress deformation under extreme high-temperature environment, ensuring the service life of the burner 20 of the partial oxidation furnace.
[0026] An insulation structure 30 for the partial oxidation furnace burner 20 is provided on the partial oxidation furnace burner 20. The insulation structure 30 includes multiple anchors 301, a refractory insulation ring 302, and a ceramic fiber felt layer 303.
[0027] Anchors 301 are fixed, for example, by welding, to the outer peripheral surface of the connecting portion 203 and the outer peripheral surface of the upper burner 201 excluding the connecting portion 203. Anchors 301 can be Y-shaped, L-shaped, or other suitable shaped metal parts. Multiple anchors 301 are evenly distributed circumferentially along the partial oxidation furnace burner 20. Preferably, multiple anchors 301 are evenly fixed circumferentially to the outer peripheral surface of the connecting portion 203 and to the outer peripheral surface of the upper burner 201 excluding the connecting portion 203. Preferably, multiple anchors 301 are arranged in multiple rings at intervals along the axial direction of the partial oxidation furnace burner 20, with multiple anchors 301 in each ring evenly distributed circumferentially along the partial oxidation furnace burner 20. In the multi-ring anchor 301, at least one ring of anchor 301 near the lower part 202 of the burner is fixed to the outer peripheral surface of the connecting part 203, and the remaining rings of anchor 301 are fixed to the outer peripheral surface of the upper part 201 of the burner, excluding the connecting part 203.
[0028] A refractory insulating ring 302 is arranged around the outer peripheral surface of the partial oxidizer burner 20. Specifically, one end of the refractory insulating ring 302 is arranged around the connecting portion 203, and the other end of the refractory insulating ring 302 is arranged around a portion of the lower part 202 of the burner to cover a portion of the outer peripheral surface of the lower part 202 of the burner. The refractory insulating ring 302 is formed by casting refractory material. The refractory material covers the anchor 301, thereby firmly fixing the refractory insulating ring 302 to the outer peripheral surface of the partial oxidizer burner 20. The refractory material is preferably refractory cement, which has a temperature resistance of over 1600°C, higher than the highest operating temperature inside the furnace body 10 (approximately 1450°C), and therefore can work stably in high-temperature environments for a long time without damage.
[0029] Understandably, the outer diameter of the refractory insulation ring 302 should not be greater than, equal to, or close to the inner diameter of the burner mounting hole 103, to avoid damage to the inner wall of the burner mounting hole 103 due to scraping during burner 20 installation. On the other hand, the outer diameter of the refractory insulation ring 302 should not be significantly smaller than the inner diameter of the burner mounting hole 103, to minimize the scouring of the ceramic fiber felt layer 303 by the high-temperature airflow passing through the annular gap between the refractory insulation ring 302 and the burner mounting hole 103. In some embodiments, the difference between the outer diameter of the refractory insulation ring 302 and the inner diameter of the burner mounting hole 103 is in the range of 0.8 to 1.0 cm.
[0030] A ceramic fiber felt layer 303 is disposed on the outer peripheral surface of the upper burner 201. The ceramic fiber felt layer 303 is formed by winding layers of high-temperature resistant ceramic fiber felt, and one end abuts against the end of the refractory insulation ring 302. During the winding process, multiple anchors 301 fixed on the outer peripheral surface of the upper burner 201 (excluding the connecting part 203) penetrate the ceramic fiber felt layer 303 to fix it to the outer peripheral surface of the upper burner 201. The ceramic fiber felt layer 303 and the refractory insulation ring 302 are non-adhesively connected, that is, no adhesive is used to fix them together. When the partial oxidation furnace burner 20 is installed in the burner mounting hole 103 of the furnace body 10, the ceramic fiber felt layer 303 fills the gap between the upper burner 201 and the wall of the burner mounting hole 103. Because the high-temperature resistant ceramic fiber felt is compressible and has expansion recovery properties, the ceramic fiber felt layer 303, which is tightly wrapped around the upper part 201 of the burner before installation, will slowly expand after installation and completely fill the gap between part of the oxidation furnace burner 20 and the burner mounting hole 103, forming a good sealing and heat insulation effect.
[0031] Understandably, the end face of the refractory insulation ring 302 can form a supporting platform to support the weight of the ceramic fiber felt layer 303, preventing it from sliding down or falling off during high-temperature environments and long-term use. The refractory insulation ring 302 can reduce the cross-sectional area of the channel between the oxidizer burner 20 and the burner mounting hole 103, effectively controlling the upward flow of high-temperature gas within the furnace body 10 into the space where the ceramic fiber felt layer 303 is located, thus reducing the heat load borne by the ceramic fiber felt layer 303. The refractory insulation ring 302 can also prevent the high-temperature airflow within the furnace body 10 from directly eroding the ceramic fiber felt layer 303, avoiding accelerated wear due to airflow erosion.
[0032] The preferred embodiments disclosed above are merely illustrative of this application. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. The selection and detailed description of these embodiments in this specification are intended to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize it. This application is limited only by the claims and their full scope and equivalents.
Claims
1. An insulating structure (30) for a partial oxidation furnace burner (20), the partial oxidation furnace burner (20) comprising an upper burner portion (201) and a lower burner portion (202) connected to the upper burner portion (201), characterized in that, The thermal insulation structure (30) includes: A refractory insulating ring (302) is disposed on the outer peripheral surface of the upper part (201) of the burner, extends toward the lower part (202) of the burner, and covers at least a portion of the outer peripheral surface of the lower part (202) of the burner; and The ceramic fiber felt layer (303) is disposed on the outer peripheral surface of the upper part (201) of the burner, and is located on the side of the refractory material insulation ring (302) away from the lower part (202) of the burner along the axial direction of the burner (20).
2. The thermal insulation structure (30) according to claim 1, characterized in that, The thermal insulation structure also includes anchors (301). The anchor (301) is fixed to the outer peripheral surface of the upper part (201) of the burner; The refractory insulation ring (302) is formed by casting and covers the anchor (301).
3. The thermal insulation structure (30) according to claim 2, characterized in that, The anchor (301) is evenly distributed circumferentially along the upper part (201) of the burner.
4. The thermal insulation structure (30) according to claim 2, characterized in that, The anchor (301) is a Y-shaped nail, a T-shaped nail, or an L-shaped nail.
5. The thermal insulation structure (30) according to claim 1, characterized in that, The refractory insulation ring (302) is formed by casting refractory cement with a temperature resistance of not less than 1600℃.
6. The thermal insulation structure (30) according to claim 1, characterized in that, The ceramic fiber felt layer (303) abuts against the end face of the refractory insulation ring (302); and The ceramic fiber felt layer (303) and the refractory insulation ring (302) are connected by a non-adhesive bond.
7. The thermal insulation structure (30) according to claim 1, characterized in that, The ceramic fiber felt layer (303) is formed by wrapping the ceramic fiber felt layer around the outer peripheral surface of the upper part (201) of the burner.
8. A partial oxidation furnace (20), characterized in that, include: Furnace body (10); Partial oxidation furnace burners (20) are installed on the furnace body (10). as well as The heat insulation structure (30) as described in any one of claims 1-7 is provided on the burner (20) of the partial oxidation furnace. The furnace body (10) has a burner mounting hole (103) at the top center. The partial oxidation furnace burner (20) is inserted into the burner mounting hole (103); and The refractory insulation ring (302) and the ceramic fiber felt layer (303) of the insulation structure (30) are filled in the gap between the partial oxidation furnace burner (20) and the burner mounting hole (103).
9. The partial oxidation furnace (20) according to claim 8, characterized in that, The outer diameter of the ceramic fiber felt layer (303) in its free state is larger than the inner diameter of the burner mounting hole (103), so that the ceramic fiber felt layer (303) is under pressure in the gap between the upper part (201) of the burner and the hole wall of the burner mounting hole (103).
10. The partial oxidation furnace (20) according to claim 8, characterized in that, The partial oxidation furnace burner (20) includes an upper burner part (201) and a lower burner part (202) connected to the upper burner part (201). The upper part (201) of the burner is made of stainless steel; and The lower part (202) of the burner is made of a nickel-based high-temperature alloy.