Flue gas flow choking structure

Abstract

The utility model discloses a smoke choke structure, which relates to the technical field of coal economizers, and adopts the technical scheme that the smoke choke structure comprises a suspension pipe, a coiled pipe, a protection plate and a protection sleeve, and the protection plate is positioned above the coiled pipe; a through hole is formed in the protection plate, and the suspension pipe is located in the through hole; the protective sleeve is arranged on the suspension pipe in a sleeving mode, and the bottom end of the protective sleeve is fixedly connected with the protective plate. According to the utility model, full-surrounding protection is formed at the joint of the suspension pipe and the coiled pipe through the protection plate and the protection sleeve, so that even if flue gas collides with the protection plate and the protection sleeve to form a flue gas vortex, the flue gas vortex does not cause any abrasion to the joint of the suspension pipe and the coiled pipe surrounded by the protection plate and the protection sleeve; the replacement frequency of the suspension pipe and the coiled pipe is effectively reduced, and the workload of maintainers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of economizers, and more specifically, to a flue gas flow-blocking structure. Background Art

[0002] Economizer is a heat exchange device used to improve the efficiency of boiler system. Economizer is usually installed in the flue of boiler, using the waste heat carried by the flue gas discharged by the boiler to preheat the water in the pipe. The preheated feed water needs less fuel to heat after entering the boiler, thus improving the overall thermal efficiency of the boiler.

[0003] For example, Chinese patent CN105889895A provides an economizer that changes the area and flow pattern to increase the SCR inlet flue gas temperature, wherein the suspension pipe is vertical, the serpentine pipe is horizontal, and the bottom end of the suspension pipe is connected to the serpentine pipe. The flue gas passes through the suspension pipe and the serpentine pipe from top to bottom, and it is very easy to form a flue gas vortex at the connection between the suspension pipe and the serpentine pipe, resulting in increased wear at the connection between the suspension pipe and the serpentine pipe, increased replacement frequency of the suspension pipe and the serpentine pipe, and increased workload of maintenance personnel. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a smoke flow-blocking structure, which includes a suspension pipe, a serpentine pipe, a protective plate and a protective sleeve, wherein the protective plate is located above the serpentine pipe; a through hole is provided on the protective plate, and the suspension pipe is located in the through hole; the protective sleeve is mounted on the suspension pipe, and the bottom end of the protective sleeve is fixedly connected to the protective plate.

[0005] The utility model is further configured as follows: the protective plate is composed of two parts symmetrically arranged about the axis of the through hole, and the two parts of the protective plate are fixedly connected; the protective sleeve is composed of two parts symmetrically arranged about the axis of the through hole, and the two parts of the protective sleeve are fixedly connected.

[0006] The utility model is further configured such that: the joint between the two parts of the protection plate is perpendicular to the length direction of the serpentine tube.

[0007] The utility model is further configured such that: the plane where the joints of the two parts of the protective sleeve are located is perpendicular to the length direction of the serpentine tube.

[0008] The utility model is further configured as follows: the inner diameter of the protective sleeve is equal to the outer diameter of the suspension pipe.

[0009] The utility model is further configured as follows: the protective plate is arranged horizontally.

[0010] The utility model is further configured as follows: the bottom surface of the protection plate is in contact with the serpentine tube.

[0011] The utility model is further configured as follows: the outer contour of the protection plate is a rectangle, the length direction of the protection plate is parallel to the length direction of the serpentine tube; and the width direction of the protection plate is perpendicular to the length direction of the serpentine tube.

[0012] The utility model is further configured as follows: the protective plate is a metal protective plate, and the protective sleeve is a metal protective sleeve.

[0013] The utility model is further configured as follows: the metal protective plate is a steel protective plate, the metal protective sleeve is a steel protective sleeve, the thickness of the steel protective plate is 3-5mm, and the thickness of the steel protective sleeve is 3-5mm.

[0014] To sum up, compared with the prior art, the utility model has the following beneficial effects: the utility model forms a fully enclosed protection for the connection between the suspension pipe and the serpentine pipe through the protective plate and the protective cover. Even if the smoke forms a smoke vortex due to the collision with the protective plate and the protective cover, the smoke vortex will not cause any wear to the connection between the suspension pipe and the serpentine pipe surrounded by the protective plate and the protective cover, effectively reducing the replacement frequency of the suspension pipe and the serpentine pipe and reducing the workload of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0016] Figure 2 A schematic diagram of providing multiple protective plates and protective sleeves in an economizer.

[0017] In the figure: 1. Suspension pipe; 2. Serpentine pipe; 3. Protective plate; 4. Protective cover. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They 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, and therefore cannot be understood as a limitation on the utility model.

[0020] like Figure 1As shown, it is the basic structure of a preferred embodiment of the utility model. This embodiment provides a smoke flow blocking structure, which includes a suspension pipe 1, a serpentine pipe 2, a protective plate 3 and a protective sleeve 4. The protective plate 3 is located above the serpentine pipe 2; a through hole is provided on the protective plate 3, and the suspension pipe 1 is located in the through hole; the protective sleeve 4 is sleeved on the suspension pipe 1, and the bottom end of the protective sleeve 4 is fixedly connected to the protective plate 3.

[0021] In this embodiment, the connection between the suspension pipe 1 and the serpentine pipe 2 is fully protected by the protection plate 3 and the protection cover 4. Even if the smoke forms a smoke vortex due to the collision with the protection plate 3 and the protection cover 4, the smoke vortex will not cause any wear to the connection between the suspension pipe 1 and the serpentine pipe 2 surrounded by the protection plate 3 and the protection cover 4, thereby effectively reducing the replacement frequency of the suspension pipe 1 and the serpentine pipe 2 and reducing the workload of maintenance personnel.

[0022] Specifically, the protective plate 3 described in this embodiment is composed of two parts symmetrically arranged about the axis of the through hole, so that the suspension tube 1 can be placed in the through hole without changing the connection relationship between the suspension tube 1 and the serpentine tube 2. When the through hole walls of the two parts of the protective plate 3 are both in contact with the suspension tube 1 or the connection between the suspension tube 1 and the serpentine tube 2, the two parts of the protective plate 3 can be fixedly connected together to protect the connection between the suspension tube 1 and the serpentine tube 2 and the serpentine tube 2 below the protective plate 3. The protective sleeve 4 is composed of two parts symmetrically arranged about the axis of the through hole, so that the suspension tube 1 can be placed in the protective sleeve 4 without changing the connection relationship between the suspension tube 1 and the serpentine tube 2. When the two parts of the protective sleeve 4 are both in contact with the suspension tube 1, the two parts of the protective sleeve 4 can be fixedly connected together to protect the connection between the suspension tube 1 and the serpentine tube 2 and the suspension tube 1 inside the protective sleeve 4.

[0023] Specifically, in the present embodiment, the joint of the two parts of the protective plate 3 is perpendicular to the length direction of the serpentine tube 2. Generally, a plurality of suspension tubes 1 in the economizer are linearly arranged in a direction perpendicular to the length direction of the serpentine tube 2. The flue gas impact between two adjacent suspension tubes 1 is often the smallest. Therefore, when the joint of the two parts of the protective plate 3 is perpendicular to the length direction of the serpentine tube 2, the impact and wear on the joint of the two parts of the protective plate 3 are also relatively small, which can effectively improve the reliability of the joint of the two parts of the protective plate 3.

[0024] Specifically, in the present embodiment, the plane where the joint of the two parts of the protective cover 4 is located is perpendicular to the length direction of the serpentine tube 2. Generally, in the economizer, multiple suspension tubes 1 are linearly arranged in a direction perpendicular to the length direction of the serpentine tube 2, and the flue gas impact between two adjacent suspension tubes 1 is often the smallest. Therefore, when the joint of the two parts of the protective cover 4 is perpendicular to the length direction of the serpentine tube 2, the impact and wear on the joint of the two parts of the protective cover 4 are also relatively small, which can effectively improve the reliability of the joint of the two parts of the protective cover 4.

[0025] Specifically, the inner diameter of the protective sleeve 4 in this embodiment is equal to the outer diameter of the suspension pipe 1 to prevent smoke from entering between the protective sleeve 4 and the suspension pipe 1 and causing wear to the suspension pipe 1 and the connection between the suspension pipe 1 and the serpentine pipe 2 .

[0026] Specifically, the protection plate 3 in this embodiment is arranged horizontally to prevent the flue gas guided by the protection plate 3 from impacting and wearing the serpentine tube 2 below the protection plate 3 .

[0027] Specifically, in this embodiment, the bottom surface of the protective plate 3 is in contact with the serpentine tube 2, so that the protective plate 3 is supported by the serpentine tube 2 to improve the strength of the protective plate 3. Preferably, the bottom of the protective plate 3 is supported by at least three mutually parallel parts of the serpentine tube 2, and the serpentine tubes 2 on both sides of the protective sleeve 4 are symmetrically distributed for the best, such as Figure 2 shown.

[0028] Specifically, in this embodiment, the outer contour of the protective plate 3 is a rectangle, and the width direction of the protective plate 3 is perpendicular to the length direction of the serpentine tube 2; the length direction of the protective plate 3 is parallel to the length direction of the serpentine tube 2, so as to guide the smoke as far as possible to a position farther away from the connection between the suspension pipe 1 and the serpentine tube 2.

[0029] Specifically, in this embodiment, the protective plate 3 is a metal protective plate, and the protective sleeve 4 is a metal protective sleeve, which is strong and wear-resistant. The two parts of the metal protective plate are welded together, and the two parts of the metal protective sleeve are welded together.

[0030] Specifically, the metal protective plate in this embodiment is a steel protective plate, and the metal protective cover is a steel protective cover. The thickness of the steel protective plate is 3-5mm, and the thickness of the steel protective cover is 3-5mm. It is not easy to rust, and its light weight does not easily cause long-term compression deformation at the connection between the suspension pipe 1 and the serpentine pipe 2.

[0031] To sum up, in this embodiment, the protective plate 3 and the protective cover 4 form a fully enclosed protection for the connection between the suspension pipe 1 and the serpentine pipe 2. Even if the smoke forms a smoke vortex due to the collision with the protective plate 3 and the protective cover 4, the smoke vortex will not cause any wear to the connection between the suspension pipe 1 and the serpentine pipe 2 surrounded by the protective plate 3 and the protective cover 4, thereby effectively reducing the replacement frequency of the suspension pipe 1 and the serpentine pipe 2 and reducing the workload of maintenance personnel.

[0032] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A smoke flow blocking structure, comprising a suspension pipe (1) and a serpentine pipe (2), characterized in that: It also comprises a protective plate (3) and a protective sleeve (4), wherein the protective plate (3) is located above the serpentine tube (2); a through hole is provided on the protective plate (3), and the suspension tube (1) is located in the through hole; the protective sleeve (4) is sleeved on the suspension tube (1), and the bottom end of the protective sleeve (4) is fixedly connected to the protective plate (3).

2. A smoke flow blocking structure according to claim 1, characterized in that: The protective plate (3) is composed of two parts symmetrically arranged about the axis of the through hole, and the two parts of the protective plate (3) are fixedly connected; the protective sleeve (4) is composed of two parts symmetrically arranged about the axis of the through hole, and the two parts of the protective sleeve (4) are fixedly connected.

3. A smoke flow blocking structure according to claim 2, characterized in that: The joint between the two parts of the protection plate (3) is perpendicular to the length direction of the serpentine tube (2).

4. A smoke flow blocking structure according to claim 2 or 3, characterized in that: The plane where the joints of the two parts of the protective sleeve (4) are located is perpendicular to the length direction of the serpentine tube (2).

5. A smoke flow blocking structure according to claim 1 or 2, characterized in that: The inner diameter of the protective sleeve (4) is equal to the outer diameter of the suspension pipe (1).

6. A smoke flow blocking structure according to claim 1 or 2, characterized in that: The protective plate (3) is arranged horizontally.

7. A smoke flow blocking structure according to claim 6, characterized in that: The bottom surface of the protective plate (3) is in contact with the serpentine tube (2).

8. The smoke blocking structure according to claim 6, characterized in that: The outer contour of the protective plate (3) is a rectangle, the length direction of the protective plate (3) is parallel to the length direction of the serpentine tube (2), and the width direction of the protective plate (3) is perpendicular to the length direction of the serpentine tube (2).

9. A smoke flow blocking structure according to claim 1 or 2, characterized in that: The protective plate (3) is a metal protective plate, and the protective sleeve (4) is a metal protective sleeve.

10. A smoke flow blocking structure according to claim 9, characterized in that: The metal protective plate is a steel protective plate, the metal protective sleeve is a steel protective sleeve, the thickness of the steel protective plate is 3-5mm, and the thickness of the steel protective sleeve is 3-5mm.

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