Coal-fired unit air preheater cold end steam soot blower

Abstract

The utility model relates to the technical fields of soot blower equipment, especially to a coal-fired unit air preheater cold end steam soot blower, which can realize the adjustment of the blowing airflow range without being equipped with multiple types of blowing devices, comprising a mounting seat, an air inlet pipe slidingly mounted on the mounting seat, and multiple sets of air blocking assemblies, the multiple sets of air blocking assemblies are evenly distributed around the air inlet pipe, each set of air blocking assembly comprises a connecting frame, an angle frame, and a flow blocking plate, one end of the connecting frame is hingedly connected to the mounting seat, the other end of the connecting frame is hingedly connected to the corner of the angle frame, the angle frame comprises two side rods, one side rod of the angle frame is hingedly connected to the outer wall of the air inlet pipe, the flow blocking plate is fixedly installed on the other side rod of the angle frame, the outer wall of the air inlet pipe is provided with a threaded portion, an internally threaded adjusting ring is rotatably installed on the mounting seat, the internally threaded adjusting ring is installed at the threaded portion of the outer wall of the air inlet pipe, and the mounting seat is internally provided with an air inlet channel in communication with the inside of the air inlet pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of soot blowing equipment, and in particular to a steam soot blower for the cold end of an air preheater in a coal-fired unit. Background Technology

[0002] As is well known, the steam soot blower at the cold end of the air preheater in a coal-fired power plant (or boiler plant) is a key piece of equipment used to remove ash buildup at the cold end of the air preheater.

[0003] For example, utility model patent application CN219735347U discloses a steam soot blower for the cold end of an air preheater in a coal-fired power unit, comprising: an air guide pipe and an installation device; the installation device is fixedly installed on the top of the air guide pipe, and an exhaust device is provided inside the installation device. Pushing devices are provided on both sides inside the installation device, and a limiting device is fitted on the outer surface of the pushing device. The pushing device pushes the limiting device to restrict the exhaust device to the surface of the installation device. The user can pull the pushing device to disassemble the exhaust device, replace it with an exhaust device suitable for blowing at different locations, control the range of the blown airflow, and adapt to blowing soot at different locations.

[0004] However, the above-mentioned device still has the following drawbacks: although different types of jet devices can be used to blow soot from different locations within the cold end of the air preheater, the cost of equipping different types of jet devices is high and there are certain limitations in their use. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a steam soot blower for the cold end of an air preheater in a coal-fired power unit that can adjust the range of the blown airflow without requiring multiple types of blowing devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a steam soot blower for the cold end of an air preheater in a coal-fired power unit, comprising a mounting base, an air inlet pipe slidably mounted on the mounting base, and multiple sets of air baffles. The multiple sets of air baffles are evenly distributed around the circumference of the air inlet pipe. Each set of air baffles includes a connecting frame, a corner frame, and a baffle plate. One end of the connecting frame is hinged to the mounting base, and the other end of the connecting frame is hinged to the corner of the corner frame. The corner frame includes two side rods. One side rod of the corner frame is hinged to the outer wall of the air inlet pipe. The baffle plate is fixedly mounted on the other side rod of the corner frame. The outer wall of the air inlet pipe is provided with a threaded portion. An internally threaded adjusting ring is rotatably mounted on the mounting base. The internally threaded adjusting ring is installed at the threaded portion of the outer wall of the air inlet pipe. The mounting base has an air inlet channel communicating with the interior of the air inlet pipe. Furthermore, the two side rods form an angle of 30°-70°.

[0007] Preferably, the mounting bracket includes a fixed bracket and a movable bracket. The fixed bracket is provided with a connecting ball portion, and the movable bracket is provided with a covering shell portion that fits into the connecting ball portion. The covering shell portion and the connecting ball portion are rotatably and sealingly connected. Further, the fixed bracket is provided with a first connecting channel, and the movable bracket is provided with a second connecting channel. The first connecting channel and the second connecting channel are connected to form an air intake channel.

[0008] Preferably, a plastic sealing layer is provided on the outer wall of the connecting ball portion, and the connecting ball portion is sealed to the covering shell portion through the plastic sealing layer; further, the plastic sealing layer may be made of high-temperature resistant rubber, polyvinyl chloride or other equivalent materials with sealing effect.

[0009] Preferably, a spring is fitted on the outer wall of the air intake pipe, one end of the spring abuts against the upper part of the air intake pipe, and the other end of the spring abuts against the mounting base.

[0010] Preferably, the baffle is trapezoidal in shape, and the short side of the baffle is located on the outlet side of the intake pipe.

[0011] Preferably, the fixing seat is provided with a connecting part, which is used to connect the fixing seat to an external steam supply pipeline; furthermore, the connecting part can be a threaded connector or a flange connector, or other detachable connectors.

[0012] Preferably, the outer wall of the internal thread adjusting ring is provided with anti-slip texture; further, the anti-slip texture can be a concave or convex pattern, or it can be multiple triangular protrusions, which are evenly distributed around the outer wall of the internal thread adjusting ring.

[0013] Compared with the prior art, this utility model provides a steam soot blower for the cold end of an air preheater in a coal-fired power unit, which has the following advantages: This steam soot blower for the cold end of an air preheater in a coal-fired power unit moves the air inlet pipe away from or closer to the mounting base by rotating the internal threaded adjusting ring. After being driven by the angle bracket, the baffles on multiple baffle components converge or disperse with each other. In this way, the pressurized steam ejected from the outlet end of the air inlet pipe can be converged or dispersed, thereby adjusting the range of the blown steam flow. The range of the blown air flow can be adjusted without the need for multiple types of blowing devices. The structure is simple and reasonable, and the operation is convenient. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is a top view schematic diagram of the structure of this utility model;

[0016] Figure 3 This is the utility model Figure 2Schematic diagram of the cross-sectional structure at point AA;

[0017] Figure 4 This is the utility model Figure 1 A magnified schematic diagram of the structure at point B in the middle;

[0018] The following are labels in the attached diagram: 1. Intake pipe; 2. Connecting frame; 3. Angle bracket; 4. Baffle plate; 5. Threaded part; 6. Internal threaded adjusting ring; 7. Intake passage; 8. Fixed seat; 9. Movable seat; 10. Plastic sealing layer; 11. Spring; 12. Connecting part; 13. Anti-slip texture; 14. Connecting ball part; 15. Covering shell part. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] As described in the background section, the steam soot blower at the cold end of the air preheater in a coal-fired unit can be used to blow soot at different locations within the cold end of the air preheater by employing different types of jet devices. However, the cost of equipping different types of jet devices is high, and their use is somewhat limited.

[0021] To solve this technical problem, this utility model provides a steam soot blower for the cold end of an air preheater in a coal-fired power unit, which is used for ash removal at the cold end of the air preheater in a coal-fired power unit.

[0022] 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.

[0023] 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.

[0024] Example 1

[0025] Please refer to Figure 1-3A steam soot blower for the cold end of an air preheater in a coal-fired power unit includes: a mounting base, an inlet pipe 1 slidably mounted on the mounting base, and multiple sets of air-blocking components. The multiple sets of air-blocking components are evenly distributed around the inlet pipe 1. Each set of air-blocking components includes a connecting frame 2, a corner bracket 3, and a baffle plate 4. One end of the connecting frame 2 is hinged to the mounting base, and the other end of the connecting frame 2 is hinged to the corner of the corner bracket 3. The corner bracket 3 includes two side rods. One side rod of the corner bracket 3 is hinged to the outer wall of the inlet pipe 1. The baffle plate 4 is fixedly mounted on the other side rod of the corner bracket 3. A threaded portion 5 is provided on the outer wall of the inlet pipe 1. An internally threaded adjusting ring 6 is rotatably mounted on the mounting base at the threaded portion 5 on the outer wall of the inlet pipe 1. An inlet channel 7 communicating with the interior of the inlet pipe 1 is provided inside the mounting base. Furthermore, the two side rods form an angle of 30°-70°.

[0026] For details, please refer to Figure 1 A spring 11 is fitted on the outer wall of the air intake pipe 1. One end of the spring 11 abuts against the upper part of the air intake pipe 1, and the other end of the spring 11 abuts against the mounting base.

[0027] For details, please refer to Figure 1 or Figure 2 The baffle 4 is trapezoidal in shape, and the short side of the baffle 4 is located on the side of the outlet end of the intake pipe 1.

[0028] For details, please refer to Figure 4 The outer wall of the internal thread adjusting ring 6 is provided with anti-slip texture 13; furthermore, the anti-slip texture 13 can be a concave or convex texture, or it can be multiple triangular protrusions, which are evenly distributed around the outer wall of the internal thread adjusting ring 6.

[0029] The cold-end steam soot blower of the air preheater of the coal-fired unit provided in this embodiment, after the position of the inlet pipe 1 is adjusted, can form an axial force on the inlet pipe 1 under the action of the spring 11, so that the internal thread adjusting ring 6 is tightly connected to the inlet pipe 1, and avoids the internal thread adjusting ring 6 from rotating on its own due to the vibration generated by the pressurized steam flow. The baffle plate 4 adopts a trapezoidal shape, which can facilitate the convergence of the baffle plates 4 into a constricted trumpet shape, so as to concentrate the steam flow. The anti-slip texture 13 can increase the friction at the outer wall of the internal thread adjusting ring 6, making it easier for the operator to screw the internal thread adjusting ring 6.

[0030] Example 2

[0031] Further adjustments were made to the cold-end steam soot blower of the air preheater for the coal-fired unit provided in Example 1. For details, please refer to... Figure 3The mounting bracket includes a fixed base 8 and a movable base 9. The fixed base 8 is provided with a connecting ball part 14, and the movable base 9 is provided with a covering shell part 15 that fits into the connecting ball part 14. The covering shell part 15 and the connecting ball part 14 are rotatably and sealingly connected. Furthermore, the fixed base 8 is provided with a first connecting channel, and the movable base 9 is provided with a second connecting channel. The first connecting channel and the second connecting channel are connected to form an air intake channel 7.

[0032] For details, please refer to Figure 3 A plastic sealing layer 10 is provided on the outer wall of the connecting ball part 14, and the connecting ball part 14 is sealed to the covering shell part 15 through the plastic sealing layer 10; furthermore, the plastic sealing layer 10 can be made of high temperature resistant rubber, polyvinyl chloride or other equivalent materials with sealing effect.

[0033] For details, please refer to Figure 1 A connecting part 12 is provided at the fixed base 8, which is used to connect the fixed base 8 to the external steam supply pipeline; furthermore, the connecting part 12 can be a threaded connector or a flange connector, or other detachable connectors.

[0034] The steam soot blower for the cold end of the air preheater of the coal-fired unit provided in this embodiment can rotate the movable seat 9 under the action of the connecting ball part 14 and the covering shell part 15, so that the outlet end of the air inlet pipe 1 faces different directions, thereby blowing soot at different positions in the cold end of the air preheater of the coal-fired unit; the plastic sealing layer 10, while playing a sealing role, can promote the inertial connection between the movable seat 9 and the fixed seat 8. After the position of the movable seat 9 is adjusted, the plastic sealing layer 10 can prevent the movable seat 9 from moving on its own; under the action of the connecting part 12, it is easy to connect the fixed seat 8 to the external steam supply pipeline.

[0035] The usage process of the steam soot blower for the cold end of the air preheater of a coal-fired unit provided by this utility model is as follows: The fixed seat 8 is installed at the external steam supply pipeline. By rotating the movable seat 9, the direction of the outlet end of the air inlet pipe 1 changes, thereby adaptively adjusting the direction of the steam flow and realizing the adjustment of different positions inside the cold end of the air preheater of the coal-fired unit; by rotating the internal threaded adjusting ring 6, the air inlet pipe 1 moves away from or closer to the mounting seat. After being driven by the angle bracket 3, the baffles 4 on the multiple baffle components converge or disperse with each other. In this way, the pressurized steam ejected from the outlet end of the air inlet pipe 1 can be converged or dispersed, thereby adjusting the range of the blown steam flow.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A steam soot blower for the cold end of an air preheater in a coal-fired power unit, characterized in that, The device includes a mounting base, an air intake pipe (1) slidably mounted on the mounting base, and multiple sets of air baffles. The multiple sets of air baffles are evenly distributed around the air intake pipe (1). Each set of air baffles includes a connecting frame (2), a corner bracket (3), and a baffle plate (4). One end of the connecting frame (2) is hinged to the mounting base, and the other end of the connecting frame (2) is hinged to the corner of the corner bracket (3). The corner bracket (3) includes two side rods. One side rod of the corner bracket (3) is hinged to the outer wall of the air intake pipe (1). The baffle plate (4) is fixedly mounted on the other side rod of the corner bracket (3). The outer wall of the air intake pipe (1) is provided with a threaded part (5). An internal threaded adjusting ring (6) is rotatably mounted on the mounting base. The internal threaded adjusting ring (6) is installed at the threaded part (5) on the outer wall of the air intake pipe (1). The mounting base is provided with an air intake channel (7) that communicates with the inside of the air intake pipe (1).

2. The cold-end steam soot blower for the air preheater of a coal-fired unit according to claim 1, characterized in that, The mounting bracket includes a fixed base (8) and a movable base (9). The fixed base (8) is provided with a connecting ball (14), and the movable base (9) is provided with a covering shell (15) that fits into the connecting ball (14). The covering shell (15) and the connecting ball (14) are rotatably and sealingly connected.

3. The cold-end steam soot blower of the air preheater in a coal-fired unit according to claim 2, characterized in that, A plastic sealing layer (10) is provided on the outer wall of the connecting ball part (14), and the connecting ball part (14) is sealed to the covering shell part (15) through the plastic sealing layer (10).

4. The cold-end steam soot blower of the air preheater in a coal-fired unit according to claim 1, characterized in that, A spring (11) is fitted on the outer wall of the air intake pipe (1). One end of the spring (11) abuts against the upper part of the air intake pipe (1), and the other end of the spring (11) abuts against the mounting base.

5. The cold-end steam soot blower for the air preheater of a coal-fired unit according to claim 1, characterized in that, The baffle (4) is trapezoidal in shape, and the short side of the baffle (4) is located on the outflow end side of the intake pipe (1).

6. The cold-end steam soot blower of the air preheater in a coal-fired unit according to claim 2, characterized in that, The fixing seat (8) is provided with a connecting part (12), which is used to connect the fixing seat (8) to the external steam supply pipeline.

7. The cold-end steam soot blower for the air preheater of a coal-fired unit according to claim 1, characterized in that, The inner thread adjusting ring (6) has anti-slip texture (13) on its outer wall.

Images