Connecting structure of waste heat boiler inlet expansion joint and flue

Abstract

The utility model discloses a waste heat boiler inlet expansion joint and flue connecting structure which comprises a heat preservation pillow, a machine side partition, first heat preservation cotton and a furnace side partition which are sequentially arranged, one side of the first heat preservation cotton spans the machine side partition and the heat preservation pillow, and the other side of the first heat preservation cotton spans the furnace side partition. Through the spanning design of the first heat preservation cotton, all the cavities separated by the furnace side partition and the machine side partition are connected by the first heat preservation cotton, the problem that after heat expansion of all the structures of an original structure, splicing gaps of the heat preservation cotton at the partition positions can be enlarged is solved, and the telescopic performance and integrity of the heat preservation structures of all the cavities in long-term use are guaranteed; by wrapping the second heat preservation cotton with heat preservation cloth, the service life is prolonged, and the heat preservation effect is enhanced; by changing the connection structure of the expansion joint protection plate and the first flue inner protection plate, the downwind design that the front portion presses the rear portion is achieved, wind is prevented from being poured into a connection seam, and leakproofness is guaranteed; the first flue inner protection plate and the second flue inner protection plate are directly connected through the L-shaped block, so that air is further prevented from being blown into the flue.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joint connection, and particularly to a connection structure between an expansion joint at the inlet of a waste heat boiler and a flue. Background Art

[0002] At present, the outer side of the connection structure between the expansion joint at the inlet of the flue of the DG277 / 10.67 / 37.2 / 3.73 / 47.2 / 0.48-M102 type waste heat boiler and the flue is connected by a flange, and the inner side is connected by a connecting inner guard plate. See Figure 1 , inside the connection structure, starting from the direction of the flue gas, it is composed of thermal insulation cotton, a hard partition on the machine side, thermal insulation cotton, a hard partition on the furnace side, and thermal insulation respectively. Each structure cooperates with each other to achieve the effects of connection and thermal insulation.

[0003] However, this connection structure between the expansion joint at the inlet of the flue and the flue has the problems that the layout of the thermal insulation materials at each position inside is unreasonable, the partitions do not cross each other, resulting in poor telescopic performance, and the inner guard plates on the inner side of the connection structure are prone to large gaps due to unreasonable lap structures. During the operation of the boiler, flue gas is likely to enter from the gaps and quickly damage the thermal insulation structure, resulting in problems such as a sharp decline in thermal insulation effect, overheating of the outer wall, and reduction of service life. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a connection structure between an expansion joint at the inlet of a waste heat boiler and a flue with good thermal insulation performance of the connection structure during the long-term start-stop use of the boiler.

[0005] To solve the above technical problem, the utility model adopts the following technical scheme: A connection structure between an expansion joint at the inlet of a waste heat boiler and a flue, comprising a thermal insulation pillow, a machine-side partition, a first thermal insulation cotton, and a furnace-side partition arranged in sequence along the flue gas flow direction. One side of the first thermal insulation cotton straddles the machine-side partition and the thermal insulation pillow, and the other side straddles the furnace-side partition.

[0006] Further, the first thermal insulation cotton is composed of a plurality of strip-shaped cotton arranged in sequence along the width direction of the flue, and the strip-shaped cotton located on both sides respectively straddles the thermal insulation pillow and the furnace-side partition.

[0007] Further, one of the strip-shaped cotton is bent and fits with the end of the furnace-side partition.

[0008] Further, both sides of two of the strip-shaped cotton are bent respectively and enclose a receiving cavity, and the strip-shaped cotton is arranged in the receiving cavity.

[0009] Further, the thermal insulation pillow includes a second thermal insulation cotton and a thermal insulation cloth wrapping the second thermal insulation cotton.

[0010] Furthermore, the inner lining plate of the first flue and the expansion joint lining plate are connected in a high-low arrangement.

[0011] Furthermore, the furnace-side partition is arranged inside the flue.

[0012] Furthermore, the inner lining plate of the second flue and the inner lining plate of the first flue are arranged in a high-low arrangement, and the inner lining plate of the first flue and the inner lining plate of the second flue are connected by an L-shaped block.

[0013] The beneficial effects of the present utility model are embodied in:

[0014] In the connection structure between the expansion joint at the inlet of the waste heat boiler and the flue of the present utility model, through the cross-over design of the first heat-insulating cotton, the chambers separated by the furnace-side partition and the machine-side partition are connected by the first heat-insulating cotton, solving the problem that the splicing gap of the heat-insulating cotton at the partition position will increase after the thermal expansion of each structure in the original structure, and ensuring the telescopic performance and integrity of the heat-insulating structure of each chamber during long-term use;

[0015] By wrapping the heat-insulating cloth outside the second heat insulation, the separation of the inner second heat-insulating cotton is avoided, the service life is prolonged, and the heat-insulating effect is enhanced;

[0016] By changing the connection structure of the expansion joint lining plate and the inner lining plate of the first flue, a "front-pressure-back" downwind design is realized, avoiding the wind from pouring into the connection seam when the wind blows, and ensuring the tightness;

[0017] By arranging the furnace-side partition inside the flue and directly connecting the inner lining plate of the first flue and the inner lining plate of the second flue with an L-shaped block, the wind blowing into the interior is further blocked, achieving a heat-insulating effect. Description of the Drawings

[0018] Figure 1 is the connection structure between the expansion joint at the inlet of the waste heat boiler and the flue described in the background art;

[0019] Figure 2 is the connection structure between the expansion joint at the inlet of the waste heat boiler and the flue of the present utility model;

[0020] Figure 3 is the schematic structural diagram of the connection part of the inner lining plate of the present utility model;

[0021] Figure 4 is the schematic structural diagram of the connection part of the L-shaped block of the present utility model.

[0022] The marks of each component in the drawings are: 1, heat-insulating pillow; 101, second heat-insulating cotton; 102, heat-insulating cloth; 2, machine-side partition; 3, first heat-insulating cotton; 301, strip-shaped cotton; 4, furnace-side partition; 5, expansion joint lining plate; 6, inner lining plate of the first flue; 601, bent plate; 602, flat plate; 7, inner lining plate of the second flue; 8, L-shaped block; A, accommodation chamber. Detailed Embodiments

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] See Figure 2 。

[0025] The connection structure between the expansion joint at the inlet of the waste heat boiler of the present utility model and the flue includes a heat preservation pillow 1, a machine side partition 2, a first heat preservation cotton 3, and a furnace side partition 4 arranged in sequence along the flue gas flow direction. One side of the first heat preservation cotton 3 straddles the machine side partition 2 and the heat preservation pillow 1, and the other side straddles the furnace side partition 4. With this design, through the spanning design of the first heat preservation cotton 3, the chambers separated by the furnace side partition 4 and the machine side partition 2 are connected by the first heat preservation cotton 3, solving the problem that the splicing gap of the heat preservation cotton at the partition position will increase after the thermal expansion of each structure in the original structure, and ensuring the telescopic performance and integrity of the heat preservation structure of each chamber during long-term use.

[0026] In this embodiment, see Figure 2 , the first heat preservation cotton 3 is composed of a plurality of strip-shaped cottons 301 arranged in sequence along the width direction of the flue, and the strip-shaped cottons 301 located on both sides respectively straddle the heat preservation pillow 1 and the furnace side partition 4. With this design, by arranging a plurality of strip-shaped cottons 301, the strip-shaped cottons 301 cooperate with each other tightly and are not easily separated or blown away during long-term operation. It should be noted that a mesh is also provided at the end of the strip-shaped cotton 301 straddling the heat preservation pillow 1 to prevent the end of the strip-shaped cotton 301 from being blown away during long-term operation.

[0027] In this embodiment, see Figure 2 , one of the strip-shaped cottons 301 is bent and fits the end of the furnace side partition 4. Among them, when replacing the expansion joint in the original connection structure and emptying the old heat preservation of the connection structure, it is easy to damage the furnace side heat preservation, resulting in cavities, and at the same time causing gaps in the heat preservation of the two side chambers. This heat preservation arrangement method fills the gaps to a certain extent and makes the heat preservation of the two side chambers a whole.

[0028] In this embodiment, see Figure 2, wherein both sides of the two strip-shaped cotton waddings 301 are bent respectively and enclose to form a receiving cavity A, and the strip-shaped cotton waddings 301 are arranged in the receiving cavity A. With such a design, during the thermal expansion and contraction that occurs during the operation of the unit, when the partition on both sides expands towards both sides, it can continue to ensure that the first thermal insulation cotton 3 is closely attached and dense.

[0029] In this embodiment, referring to Figure 2 , the thermal insulation pillow 1 includes a second thermal insulation cotton 101 and a thermal insulation cloth 102 that wraps the second thermal insulation cotton 101. With such a design, since the start-stop thermal expansion and deformation at this position have the greatest impact, compared with the simple thermal insulation cotton of the old structure, the thermal insulation pillow 1 is wrapped with the thermal insulation cloth 102 to prevent it from separating or being blown away, increasing the service life and enhancing the thermal insulation effect.

[0030] In this embodiment, referring to Figure 3 , the inner lining plate 6 of the first flue and the expansion joint lining plate 5 are connected in a high-low arrangement. With such a design, by changing the connection structure to achieve a "front-pressure and rear-following" downwind design, when the wind blows, it can prevent the wind from entering the connection seam between the inner lining plate 6 of the first flue and the expansion joint lining plate 5, ensuring tightness. And among them, the inner lining plate 6 of the first flue can be composed of bent plates 601 and flat plates 602 arranged in a high-low manner. It should be noted here that the direction of the wind is opposite to the direction of the flue gas flow.

[0031] In this embodiment, referring to Figure 2 , the furnace side partition 4 is arranged inside the flue. With such a design, by reducing the connection surface between the furnace side partition 4 and the flue, the tightness of the flue connection is ensured.

[0032] In this embodiment, referring to Figure 4 , the inner lining plate 7 of the second flue and the inner lining plate 6 of the first flue are arranged in a high-low manner, and the inner lining plate 6 of the first flue and the inner lining plate 7 of the second flue are connected by an L-shaped block 8. With such a design, the inner lining plate 6 of the first flue and the inner lining plate 7 of the second flue are directly connected by the L-shaped block 8 to further prevent the wind from blowing into the interior, achieving a thermal insulation effect.

[0033] It should be understood that the examples and embodiments described herein are only for illustration and are not used to limit the present invention. Those skilled in the art can make various modifications or changes according to it. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0034] It should be noted that if there are directional indications such as up, down, left, right, front, rear... involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, "a plurality of" means more than two. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

Claims

1. A connection structure between the expansion joint at the inlet of a waste heat boiler and the flue, comprising a heat preservation pillow (1), a machine-side partition (2), a first layer of heat insulating cotton (3), and a furnace-side partition (4) arranged in sequence along the flue gas flow direction, characterized in that, One side of the first heat-insulating cotton (3) straddles the machine-side partition (2) and the heat-insulating pillow (1), and the other side straddles the furnace-side partition (4).

2. The connection structure between the expansion joint at the inlet of the waste heat boiler and the flue according to claim 1, characterized in that The first heat-insulating cotton (3) is composed of a plurality of strip-shaped cottons (301) arranged in sequence along the width direction of the flue, and the strip-shaped cottons (301) located on both sides respectively straddle the heat-insulating pillow (1) and the furnace-side partition (4).

3. The connection structure between the expansion joint at the inlet of the waste heat boiler and the flue according to claim 2, characterized in that, One of the strip-shaped cottons (301) is bent and fits against the end of the furnace-side partition (4).

4. The connecting structure between the expansion joint at the inlet of the waste heat boiler and the flue according to claim 2, characterized in that, Both sides of two of the strip-shaped cottons (301) are bent and enclose a receiving cavity (A), and the strip-shaped cottons (301) are arranged in the receiving cavity (A).

5. The connection structure between the inlet expansion joint of the waste heat boiler and the flue according to any one of claims 1-4, characterized in that, The heat-insulating pillow (1) includes a second heat-insulating cotton (101) and a heat-insulating cloth (102) that wraps the second heat-insulating cotton (101).

6. The connection structure between the expansion joint at the inlet of the waste heat boiler and the flue according to any one of claims 1-4, characterized in that, The first flue inner lining plate (6) and the expansion joint lining plate (5) are connected in a high-low arrangement.

7. The connection structure between the inlet expansion joint of the waste heat boiler and the flue according to claim 6, characterized in that, The furnace-side partition (4) is arranged inside the flue.

8. The connection structure between the expansion joint at the inlet of the waste heat boiler and the flue according to claim 7, characterized in that, The second flue inner lining plate (7) and the first flue inner lining plate (6) are arranged in a high-low arrangement, and the first flue inner lining plate (6) and the second flue inner lining plate (7) are connected by an L-shaped block (8).

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