Combined soot blower for air preheater

Abstract

The utility model discloses a combined soot blower for an air preheater, which comprises a plurality of groups of soot blower components, and each group of soot blower components comprises a soot blower mounting support, a soot blowing pipe and a soot blower supporting sleeve; the soot blower mounting support comprises a connecting pipe and a mounting flange, the connecting pipe sleeves the outer wall of the right side of the soot blowing pipe, and the mounting flange is mounted at the end part of the connecting pipe; a sealing plate is arranged at the left end of the soot blowing pipe, a nozzle is arranged at the right end of the soot blowing pipe, a soot blowing pipe flange is arranged on the outer wall of the right end of the soot blowing pipe, and a plurality of evenly-distributed air outlets are formed in the bottom end of the soot blowing pipe in the axial direction of the soot blowing pipe. And the mounting flange is fixedly connected with the soot blowing pipe flange through a bolt and nut assembly. According to the combined soot blower for the air preheater, the soot blower assemblies distributed in parallel are arranged, and the air outlet of each soot blower assembly faces the interior of the air preheater, so that most of the area in the air preheater can be covered by the soot blower assemblies, and the soot cleaning efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler auxiliary equipment, in particular to a combined soot blower for an air preheater. Background Art

[0002] The air preheater is a key component of boilers, improving combustion efficiency and reducing energy consumption. It primarily utilizes the waste heat from flue gas discharged from the boiler's tail flue to preheat the air entering the boiler, bringing the air to a specific temperature before entering the boiler, thereby promoting more complete fuel combustion. However, because the flue gas is not deashed, it contains a large amount of dust. After long-term operation, dust easily accumulates in the air preheater pipes, resulting in reduced heat transfer efficiency.

[0003] To clean accumulated dust from air preheater ducts, a sootblower is typically used. However, due to structural limitations, single sootblower designs in existing technologies often struggle to effectively cover the entire air preheater duct, resulting in low cleaning efficiency and complex, time-consuming, and labor-intensive manual operations. Therefore, an improved combined sootblower for air preheaters is proposed to address these issues. Utility Model Content

[0004] The utility model provides a combined soot blower for an air preheater with reasonable structure and high soot cleaning efficiency, which is used to solve the technical problems of low cleaning efficiency and inconvenient use of soot blowers in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A combined sootblower for an air preheater, comprising a plurality of sootblower assemblies, each sootblower assembly comprising a sootblower mounting support, a sootblowing pipe and a sootblower support sleeve; the sootblower mounting support comprises a connecting pipe and a mounting flange, the connecting pipe is sleeved on the right side outer wall of the sootblowing pipe, and the mounting flange is mounted on the end of the connecting pipe; a sealing plate is provided at the left end of the sootblowing pipe, a nozzle is provided at the right end, a sootblowing pipe flange is provided on the right end outer wall of the sootblowing pipe, and a plurality of evenly distributed air outlets are provided at the bottom end of the sootblowing pipe along its axial direction; the mounting flange is fixedly connected to the sootblowing pipe flange by a bolt and nut assembly.

[0007] Preferably, the sootblower support sleeve is sleeved on the outer wall of the left end of the sootblowing pipe, the sootblower support sleeve is made of high temperature resistant material, and is tightly matched with the left end sealing plate of the sootblowing pipe.

[0008] Preferably, the nozzle is connected to an air source via a pipeline, and the air source is an air tank or an air pump. The injection pressure of the nozzle is adjustable to meet different dust cleaning requirements.

[0009] Preferably, the air outlets are a plurality of circular holes evenly distributed along the axial direction of the sootblowing tube, the diameter of the circular holes is 5 mm to 10 mm, and the number and distribution density of the air outlets can be selected according to the structural design of the air preheater.

[0010] Preferably, the sootblowing pipe and the sootblower support sleeve are made of corrosion-resistant alloy steel or stainless steel to improve the corrosion resistance and service life of the sootblower.

[0011] Preferably, the sootblower mounting bracket is connected to the fixing structure of the air preheater by bolts or snaps, which facilitates quick disassembly and maintenance.

[0012] Preferably, the multiple groups of sootblower assemblies are distributed in parallel and evenly at preset installation positions, which correspond to above the inlet of the air preheater, and the air outlet of each group of sootblower assemblies faces the interior of the air preheater, so that each group of sootblower assemblies can effectively clean the accumulated dust inside the air preheater.

[0013] The beneficial effect of this utility model lies in providing a modular sootblower for an air preheater. By providing multiple parallel sootblower assemblies, each with its outlet facing the interior of the air preheater, the sootblower can cover a large portion of the interior of the air preheater, significantly improving soot cleaning efficiency. Furthermore, the sootblower tube and sootblower support sleeve components are constructed of high-temperature and corrosion-resistant materials, enhancing the durability and service life of the equipment. This device has a simple structure, is easy to operate, and reduces maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a structural schematic diagram of the combined soot blower for an air preheater according to the present utility model;

[0016] Figure 2 This is a structural diagram of a sootblower assembly applied to an air preheater;

[0017] Figure 3 This is a top view of the sootblower assembly applied to the air preheater.

[0018] The accompanying drawings are marked as follows: 1. Sootblower mounting bracket; 11. Connecting pipe; 12. Mounting flange; 2. Sootblowing pipe; 21. Closing plate; 22. Nozzle; 23. Sootblowing pipe flange; 24. Air outlet; 3. Sootblower support sleeve; 4. Air preheater. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0020] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features qualified as "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 3As shown, the utility model provides a combined sootblower for an air preheater, including a plurality of sootblower assemblies, each of which includes a sootblower mounting bracket 1, a sootblowing pipe 2, and a sootblower support sleeve 3. The connecting pipe 11 of the sootblower mounting bracket 1 is sleeved on the right outer wall of the sootblowing pipe 2, and the mounting flange 12 is installed at the end of the connecting pipe 11. The sootblowing pipe 2 is fixedly connected to the mounting flange 12 through the sootblowing pipe flange 23 by a bolt and nut assembly. The sootblowing pipe 2 is passed through the connecting pipe 11 and the mounting flange 12 in sequence to ensure that the sootblowing pipe 2 and the connecting pipe 11 fit tightly. Then, the sootblowing pipe flange 23 is fastened to the mounting flange 12 using a bolt and nut assembly. During the tightening process, pay attention to check the sealing to ensure that there is no gas leakage.

[0024] The sootblower 2 is equipped with a sealing plate 21 at its left end and a nozzle 22 at its right end. Several air outlets 24 are evenly distributed along the bottom of the sootblower 2 for soot removal. The nozzles 22 are connected to an air source via a pipe. This source can be a gas tank or air pump. The output of the gas tank or air pump is connected to the nozzle 22 of the sootblower 2 via a pipe. During the connection process, ensure the pipe is airtight to prevent gas leakage.

[0025] The multiple groups of sootblower assemblies are distributed in parallel and evenly at preset installation positions above the inlet of the air preheater 4, and the air outlet 24 of each group of sootblower assemblies faces the interior of the air preheater 4, so that the sootblower assemblies can cover multiple areas inside the air preheater 4 to ensure effective soot cleaning.

[0026] The sootblower support sleeve 3 is sleeved onto the outer wall of the left end of the sootblowing tube 2 and secured using appropriate means (such as welding or clamps). The sootblower support sleeve is made of a high-temperature resistant material, such as a stainless steel alloy, to enhance the support capacity of the sootblowing tube 2. To increase the service life of the sootblower, the sootblowing tube 2 and sootblower support sleeve 3 are made of corrosion-resistant materials, such as a stainless steel alloy.

[0027] Through the above technical solutions, the utility model provides a combined soot blower with high cleaning efficiency, reasonable structure and long service life, which overcomes the shortcomings of the existing technology and has great practical application value.

[0028] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of the present invention patent.

[0029] In order to make it easier for ordinary technicians in this field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are omitted in this application document. Ordinary technicians in this field should realize that these omitted elements may also constitute the content of the present invention.

Claims

1. A combined soot blower for an air preheater, characterized in that: The combined sootblower comprises a plurality of sootblower assemblies, each sootblower assembly comprising a sootblower mounting support (1), a sootblowing pipe (2) and a sootblower support sleeve (3); The sootblower mounting support (1) comprises a connecting pipe (11) and a mounting flange (12), wherein the connecting pipe (11) is sleeved on the right outer wall of the sootblowing pipe (2), and the mounting flange (12) is mounted on the end of the connecting pipe (11); The left end of the sootblowing pipe (2) is provided with a sealing plate (21), the right end is provided with a nozzle (22), the outer wall of the right end of the sootblowing pipe (2) is provided with a sootblowing pipe flange (23), and the bottom end of the sootblowing pipe (2) is provided with a plurality of evenly distributed air outlets (24) along its axial direction; The mounting flange (12) is fixedly connected to the sootblowing pipe flange (23) via a bolt and nut assembly.

2. The combined sootblower according to claim 1, characterized in that: The sootblower support sleeve (3) is sleeved on the outer wall of the left end of the sootblowing pipe (2). The sootblower support sleeve (3) is made of high-temperature resistant material and is tightly matched with the left end sealing plate (21) of the sootblowing pipe (2).

3. The combined sootblower according to claim 1, characterized in that: The nozzle (22) is connected to an air source via a pipeline. The air source is an air storage tank or an air pump. The injection pressure of the nozzle (22) is adjustable.

4. The combined sootblower according to claim 1, characterized in that: The air outlets (24) are a plurality of circular holes evenly distributed along the axial direction of the sootblowing pipe (2), and the diameter of the circular holes is 5 mm to 10 mm.

5. The combined sootblower according to claim 1, characterized in that: The sootblowing pipe (2) and the sootblower support sleeve are made of alloy steel or stainless steel.

6. The combined sootblower according to claim 1, characterized in that: The sootblower mounting support (1) and the fixing structure of the air preheater (4) are connected via bolts or snap fasteners.

7. The combined sootblower according to any one of claims 1 to 6, characterized in that: Multiple groups of sootblower assemblies are parallely and evenly distributed at preset installation positions, the installation positions corresponding to above the inlet of the air preheater (4), and the air outlet (24) of each group of sootblower assemblies faces the interior of the air preheater (4).

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