Small-pitch membrane type wall molten ash rapid cooling heat exchange structure

Abstract

This utility model discloses a small-pitch membrane wall molten ash rapid cooling heat exchange structure, belonging to the technical field of industrial boiler equipment. It includes several sets of water-cooled wall tubes and fins. The water-cooled wall tubes are arranged at transverse intervals, and adjacent sets are connected by fin welding. Each fin has a uniformly arranged locking block on one side, and each water-cooled wall tube has a slidably connected baffle plate on its outer side. A guide plate is fixed to the outer side of each baffle plate, and mounting plates are fixed to both ends of each baffle plate. Positioning grooves are uniformly formed on the side of the mounting plate near the fins, and through grooves are formed at the top of each positioning groove. This utility model allows for precise alignment and engagement during installation, and allows for individual disassembly and cleaning later, significantly reducing installation and maintenance difficulty and cost. The molten ash flow is extended through a guide design, increasing the contact time with the heat exchange surface and efficiently improving cooling efficiency. Simultaneously, the structure has good sealing and strong deformation resistance, reducing ash accumulation and heat leakage, thus balancing practicality and reliability.

Description

Technical Field

[0001] This utility model relates to a rapid cooling heat exchange structure, and in particular to a small-pitch membrane wall molten ash rapid cooling heat exchange structure, belonging to the technical field of industrial boiler equipment. Background Technology

[0002] In industrial boilers, a tube bank formed by multiple parallel heated pipes is called a water-cooled wall. The water-cooled wall is a major heating component of the boiler, and its heat exchange performance directly affects the boiler's production efficiency. Currently, to improve the heat exchange effect of the water-cooled wall, appropriately reduce the furnace wall temperature, and better protect the furnace wall, membrane-type water-cooled wall structures are adopted. This involves welding adjacent heat exchange pipes together with flat steel to form a single, sealed heat exchange tube. Small-pitch membrane wall molten ash rapid cooling heat exchange structure achieves a small pitch design by controlling the ratio of pipe pitch to outer diameter (s / d). Specifically, a small pitch means that the ratio of pipe pitch to outer diameter (s / d) is typically less than 1.2. This ratio design increases the heat exchange surface density. During operation, the high-temperature molten ash directly contacts the membrane wall surface, and heat is transferred to the cooling medium inside the pipes through the pipe walls and fins. The large heat exchange area resulting from the small pitch enables rapid cooling of the molten ash, making it suitable for the high-temperature operating conditions of boilers, smelting furnaces, and other equipment.

[0003] Current technologies still have shortcomings:

[0004] When dealing with molten ash heat exchange, existing membrane water-cooled walls cause molten ash to slide down the wall surface in a straight line at high speed. The path of the molten ash flowing through the heat exchange area is short and the residence time is insufficient, which makes it impossible to fully exchange heat with the surface of the water-cooled wall, resulting in poor cooling effect.

[0005] To address these issues, a small-pitch membrane wall molten ash rapid cooling heat exchange structure was designed. Utility Model Content

[0006] The main purpose of this invention is to provide a small-pitch membrane wall molten ash rapid cooling heat exchange structure to solve the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved by adopting the following technical solution:

[0008] The small-pitch membrane wall molten ash rapid cooling heat exchange structure includes several sets of water-cooled wall tubes and fins. The several sets of water-cooled wall tubes are arranged at intervals along the transverse direction, and adjacent sets of water-cooled wall tubes are connected by fin welding.

[0009] All fins are evenly provided with locking blocks on one side, and baffles are slidably connected to the outer side of the water-cooled wall tubes. All baffles are fixed with guide plates on the outer side, and mounting plates are fixed at both ends of the baffles. The mounting plates are evenly provided with positioning grooves on the side near the fins, and through grooves are provided at the top of the positioning grooves. Mounting components are provided between the fins and the mounting plates.

[0010] Preferably, the interior of the water-cooled wall tubes is equipped with spiral guide ribs, and the height of the spiral guide ribs is 2-5mm.

[0011] Preferably, the mounting assembly includes screws and mounting ports, the mounting ports are evenly distributed on the fins, the screws are evenly installed on the side of the mounting plate near the fins, and the screws all pass through the mounting ports and extend to the outside of the fins, with an internal threaded ring connected to the outside of the screws.

[0012] Preferably, the card block is a T-shaped block, and the through slot is set to a T-shaped slot that matches the card block.

[0013] Preferably, the screw is a cylindrical rod, the diameter of the screw is adapted to the diameter of the mounting port, and the length of the screw is greater than the thickness of the fin.

[0014] Preferably, the mounting plate is a rectangular metal plate, the length of the mounting plate is the same as the length of the baffle, and the mounting plate and the baffle are welded and fixed.

[0015] Preferably, the guide plate is inclinedly disposed on the outside of the baffle, and the guide plate and the baffle are fixed by spot welding.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model utilizes the combined use of water-cooled wall tubes, fins, clamping blocks, baffles, guide plates, mounting plates, positioning grooves, through grooves, and spiral guide ribs. During installation, precise alignment and engagement are possible, and subsequent individual disassembly and cleaning can significantly reduce installation and maintenance difficulty and cost. The molten ash flow path is extended through the guide design, increasing the contact time with the heat exchange surface and effectively improving cooling efficiency. At the same time, the structure has good sealing and strong deformation resistance, which can reduce ash accumulation and heat leakage, taking into account both practicality and reliability.

[0018] 2. This utility model uses the combination of water-cooled wall tubes and spiral guide ribs. After the cooling medium enters through the water-cooled wall tubes, the spiral guide ribs inside the water-cooled wall tubes extend the flow length, which can more fully exchange heat with the molten ash and significantly improve the cooling efficiency.

[0019] 3. This utility model uses the cooperation of a screw, an inner threaded ring, and a mounting port. When the baffle is attached to the water-cooled wall tube, the screw can be inserted into the mounting port of the fin. Tightening the inner threaded ring can fix the baffle. The installation is quick and efficient, and subsequent disassembly and maintenance are also convenient. Attached Figure Description

[0020] Figure 1 This is the front view of the present invention;

[0021] Figure 2 This is a cross-sectional view of the water-cooled wall tube of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the fins and mounting plate of this utility model;

[0023] Figure 4 This is a cross-sectional view of the baffle of this utility model.

[0024] In the diagram: 1. Water-cooled wall tube; 2. Fin; 3. Clamping block; 4. Baffle; 5. Guide plate; 6. Mounting plate; 7. Positioning groove; 8. Through groove; 9. Spiral guide rib;

[0025] 10. Mounting components; 1001. Screw; 1002. Internal threaded ring; 1003. Mounting port. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0027] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0028] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Example 1

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment proposes a small-pitch membrane wall molten ash rapid cooling heat exchange structure, including several groups of water-cooled wall tubes 1 and fins 2. The several groups of water-cooled wall tubes 1 are arranged at intervals in the transverse direction, and adjacent groups of water-cooled wall tubes 1 are connected by welding through fins 2.

[0033] All sides of the fin 2 are evenly provided with locking blocks 3, all sides of the water-cooled wall tube 1 are slidably connected with baffles 4, all sides of the baffles 4 are fixed with guide plates 5, all ends of the baffles 4 are fixed with mounting plates 6, all sides of the mounting plate 6 near the fin 2 are evenly provided with positioning grooves 7, all tops of the positioning grooves 7 are provided with through grooves 8, and a mounting assembly 10 is provided between the fin 2 and the mounting plate 6.

[0034] The baffle 4 is attached to the outer wall of the water-cooled wall tube 1, ensuring that the mounting plate 6 on one side of the baffle 4 is tightly attached to the corresponding side of the fin 2, so that the positioning groove 7 on the mounting plate 6 is precisely aligned with the locking block 3 on one side of the fin 2, and the locking block 3 is fully inserted into the internal cavity of the positioning groove 7, thus completing the initial positioning.

[0035] Then, the baffle 4 slides vertically downwards, causing the through groove 8 and the positioning groove 7 to move downwards. During this process, the locking block 3 slides along the internal guide of the through groove 8 until the locking block 3 reaches the top limit of the internal guide channel of the through groove 8, thus realizing the locking and installation of the baffle 4 with the overall structure.

[0036] When the molten ash flows from top to bottom along the outer side of the baffle 4, it passes through the flow guiding structure of the guide plate 5. Under the guidance of the guide plate 5, the flow path of the molten ash is extended, and the contact time with the heat exchange surface is significantly increased, thereby improving the heat transfer efficiency and ensuring that the molten ash achieves the expected cooling effect.

[0037] Example 2

[0038] The following section provides a further description of the scheme in Example 1, focusing on its specific working method. See the description below for details:

[0039] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, the interior of the water-cooled wall tube 1 is further provided with spiral guide ribs 9, and the height of the spiral guide ribs 9 is 2-5mm.

[0040] The cooling medium enters the interior of the water-cooled wall tube 1. Under the action of the spiral guide ribs 9 inside the water-cooled wall tube 1, the cooling medium increases its flow length inside the water-cooled wall tube 1, fully exchanging heat with the molten ash and improving the cooling efficiency.

[0041] like Figure 3As shown, in a preferred embodiment, based on the above method, the mounting assembly 10 further includes a screw 1001 and a mounting port 1003. The mounting port 1003 is evenly opened on the fin 2. The screw 1001 is evenly installed on the side of the mounting plate 6 near the fin 2. The screw 1001 passes through the mounting port 1003 and extends to the outside of the fin 2. The outside of the screw 1001 is threaded with an inner threaded ring 1002.

[0042] When the baffle 4 is attached to the outside of the water-cooled wall tube 1, the baffle 4 drives the screw 1001 to be inserted into the mounting port 1003 on the fin 2 at the same time, so that the screw 1001 passes through the outside of the mounting port 1003. Then, the inner threaded ring 1002 is put on the outside of the screw 1001, and the inner threaded ring 1002 is screwed on. The baffle 4 is installed on the water-cooled wall tube 1 through the screw 1001.

[0043] like Figure 3 As shown, in a preferred embodiment, based on the above method, the card block 3 is further defined as a T-shaped block, and the through slot 8 is configured as a T-shaped slot that matches the card block 3.

[0044] The T-block and T-slot matching structure prevents the baffle 4 from falling off radially along the water-cooled wall tube 1, improving installation convenience.

[0045] like Figure 3 As shown, in a preferred embodiment, based on the above method, the screw 1001 is further a cylindrical rod, the diameter of the screw 1001 is adapted to the hole diameter of the mounting port 1003, and the length of the screw 1001 is greater than the thickness of the fin 2.

[0046] The compatibility between the diameter of the screw 1001 and the diameter of the mounting port 1003 can prevent the screw 1001 from shaking inside the mounting port 1003, ensuring the accurate installation position of the baffle 4; while the length of the screw 1001 is greater than the thickness of the fin 2, which can ensure that the screw 1001 still has enough length for the inner threaded ring 1002 to be screwed after penetrating the fin 2, further improving the installation stability.

[0047] like Figure 1 and Figure 4 As shown, in a preferred embodiment, based on the above method, the mounting plate 6 is further a rectangular metal plate, the length of the mounting plate 6 is the same as the length of the baffle 4, and the mounting plate 6 is welded and fixed to the baffle 4.

[0048] The length of the mounting plate 6 is the same as that of the baffle 4, which can make the force on both ends of the baffle 4 even and avoid deformation of the baffle 4 due to local stress concentration. The welding fixation method can ensure that there is no gap between the mounting plate 6 and the baffle 4, prevent molten ash from seeping in from the joint between the two, and avoid ash accumulation affecting the heat exchange efficiency.

[0049] like Figure 1As shown, in a preferred embodiment, based on the above method, the guide plate 5 is further inclinedly disposed on the outside of the baffle 4, and the guide plate 5 and the baffle 4 are fixed by spot welding.

[0050] The inclined guide plate 5 can more accurately guide the molten ash to flow along the preset path, avoiding the molten ash from directly impacting the baffle 4 vertically and causing local wear. At the same time, the inclined angle can prolong the contact time between the molten ash and the baffle 4 and the water-cooled wall tube 1, and enhance the heat exchange effect.

[0051] Example 3

[0052] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0053] Before installation, clean the dust, oil, and other impurities from the outer wall surface of the water-cooled wall tube 1 and the mating surface of the fins 2. Then, attach the baffle 4 to the outer wall surface of the water-cooled wall tube 1, ensuring that the mounting plate 6 on one side of the baffle 4 is tightly fitted with the corresponding side of the fin 2. Attach the baffle 4 to the outer wall surface of the water-cooled wall tube 1 and adjust its position simultaneously to ensure that the mounting plate 6 on one side of the baffle 4 is tightly fitted with the corresponding side of the fin 2. Ensure that the positioning groove 7 on the mounting plate 6 is precisely aligned with the locking block 3 on one side of the fin 2, and that the locking block 3 is fully inserted into the internal cavity of the positioning groove 7, thus completing the initial positioning of the baffle 4.

[0054] Slide the baffle 4 vertically downwards, and the baffle 4 will simultaneously drive the through groove 8 and the positioning groove 7 to move downwards. During this process, the locking block 3 will slide smoothly along the guide channel inside the through groove 8 until the locking block 3 reaches the top limit of the guide channel inside the through groove 8, so as to realize the locking installation of the baffle 4 and the overall structure, which not only ensures the connection is stable, but also facilitates subsequent individual disassembly and cleaning.

[0055] When the baffle 4 is attached to the outside of the water-cooled wall tube 1, the screw 1001 is simultaneously inserted into the mounting port 1003 on the fin 2. Then, the inner threaded ring 1002 is put on the outside of the screw 1001 and the inner threaded ring 1002 is screwed until it is tightly attached to the fin 2. Through the cooperation of the screw 1001 and the inner threaded ring 1002, the baffle 4 is auxiliaryly fixed, which improves the reliability of the connection.

[0056] The cooling medium enters the water-cooled wall tube 1 through the inlet end. Under the guidance of the spiral guide ribs 9 inside the water-cooled wall tube 1, the cooling medium flows through an extended length and makes full contact with the inner wall of the water-cooled wall tube 1, thus reserving efficient heat exchange conditions for subsequent heat exchange.

[0057] The molten ash flows along the outside of the baffle 4. When it flows through the guide plate 5, the flow path is extended under the action of the guide plate 5, and the contact time with the heat exchange surface composed of the baffle 4 and the water-cooled wall tube 1 is significantly increased. At the same time, the cooling medium in the water-cooled wall tube 1, such as demineralized water or steam, absorbs the heat of the molten ash through the tube wall and fins 2. The heat transfer path is: molten ash → baffle 4 → tube wall / fins 2 of water-cooled wall tube 1 → cooling medium, which finally achieves efficient heat exchange. The cooled molten ash falls and is collected in solid form.

[0058] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A small-pitch membrane wall molten ash rapid cooling heat exchange structure, including several sets of water-cooled wall tubes (1) and fins (2), the several sets of water-cooled wall tubes (1) are arranged in a transverse interval, and adjacent sets of water-cooled wall tubes (1) are welded together by fins (2); Its features are: A locking block (3) is evenly arranged on one side of the fin (2), a baffle (4) is slidably connected to the outside of the water-cooled wall tube (1), a guide plate (5) is fixed on the outside of the baffle (4), and a mounting plate (6) is fixed at both ends of the baffle (4). A positioning groove (7) is evenly opened on the side of the mounting plate (6) close to the fin (2), and a through groove (8) is opened on the top of the positioning groove (7). An installation component (10) is provided between the fin (2) and the mounting plate (6).

2. The small-pitch membrane-walled fused ash rapid cooling heat exchange structure according to claim 1, characterized in that: The interior of the water-cooled wall tube (1) is equipped with spiral guide ribs (9), and the height of the spiral guide ribs (9) is 2-5mm.

3. The small-pitch membrane-walled molten slag rapid cooling heat exchange structure according to claim 1, characterized in that: The mounting assembly (10) includes a screw (1001) and a mounting port (1003). The mounting port (1003) is evenly opened on the fin (2). The screw (1001) is evenly installed on the side of the mounting plate (6) near the fin (2). The screw (1001) passes through the mounting port (1003) and extends to the outside of the fin (2). The outer side of the screw (1001) is threaded with an inner threaded ring (1002).

4. The small-pitch membrane-walled molten slag rapid cooling heat exchange structure according to claim 1, characterized in that: The card block (3) is a T-shaped block, and the through slot (8) is set to a T-shaped slot that matches the card block (3).

5. The small-pitch membrane-walled molten slag rapid cooling heat exchange structure according to claim 3, characterized in that: The screw (1001) is a cylindrical rod. The diameter of the screw (1001) is matched with the diameter of the mounting port (1003). The length of the screw (1001) is greater than the thickness of the fin (2).

6. The small-pitch membrane-walled fused ash rapid cooling heat exchange structure according to claim 1, characterized in that: The mounting plate (6) is a rectangular metal plate. The length of the mounting plate (6) is the same as the length of the baffle (4), and the mounting plate (6) and the baffle (4) are welded and fixed.

7. The small-pitch membrane-walled molten slag rapid cooling heat exchange structure according to claim 1, characterized in that: The guide plate (5) is inclinedly set on the outside of the baffle (4), and the guide plate (5) and the baffle (4) are fixed by spot welding.

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