Sealing connection device of multidirectional free expansion pipeline

Abstract

A sealing connection device of a multidirectional free expansion pipeline relates to the technical field of environmental protection and comprises a flue gas inlet pipeline obliquely arranged relative to a flue gas desulfurization tower, and a sealing filler filled between the flue gas inlet pipeline and an inlet pipe of the flue gas desulfurization tower, the inner end of the inlet pipe is connected with the end of the smoke inlet pipeline through an inner side baffle, the inner side baffle is tightly attached to the sealing filler, the outer side baffle is connected to the outer end of the inlet pipe, the outer edge, distributed in the radial direction, of the sealing metal plate is connected with the outer side baffle, and the inner side baffle is tightly attached to the sealing filler. The sealing metal plate is flanged towards the outer side in the axial direction of the flue gas inlet pipeline and is tightly attached to the sealing filler, and the inner edge, distributed in the radial direction, of the sealing metal plate is tightly attached to the outer wall of the flue gas inlet pipeline. The sealing connection device not only can absorb swelling amounts from different directions, but also can ensure the sealing performance of the joint of the flue gas inlet pipeline and the flue gas desulfurization tower, and achieves an ideal dynamic sealing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a sealing connection device for a multi-directional free expansion pipeline. Background Art

[0002] In the sulfur recovery device of the existing enterprise, the flue gas connecting pipeline between the exhaust gas incinerator steam generator and the flue gas desulfurization tower 8 needs to operate under high temperature conditions (hot pipeline), and the flue gas inlet pipeline 3 is inclined relative to the flue gas desulfurization tower 8. Usually, a traditional welding structure or a one-way expansion structure is adopted at the connection between the two. However, in the actual operation of the device, the flue gas temperature is relatively high, and the flue gas inlet pipeline 3 and the flue gas desulfurization tower 8 each have different expansion directions and expansion amounts. The aforementioned welding structure or one-way expansion structure will limit the expansion of the pipeline, which can easily cause damage to the equipment or pipeline, and cause insufficient sealing at the connection between the two, and there is a risk of high-temperature flue gas leakage. Summary of the invention

[0003] In view of the above-mentioned technical problems, the object of the present invention is to provide a multi-directional free-expanding sealing connection device.

[0004] The objective of the present invention is achieved by adopting the following technical solutions. A multi-directional free expansion sealing connection device proposed in the present invention includes a flue gas inlet pipeline arranged obliquely relative to a flue gas desulfurization tower, a sealing filler filled between the flue gas inlet pipeline and the inlet pipe of the flue gas desulfurization tower, the inner end of the inlet pipe and the end of the flue gas inlet pipeline are connected by an inner baffle and the inner baffle is tightly fitted with the sealing filler, and also includes an outer baffle and a sealing metal plate, the outer baffle is connected to the outer end of the inlet pipe, the outer edge of the sealing metal plate distributed radially is connected to the outer baffle, the sealing metal plate is flanged outward along the axial direction of the flue gas inlet pipeline and is tightly fitted with the sealing filler, and the inner edge of the sealing metal plate distributed radially is tightly fitted with the outer wall of the flue gas inlet pipeline.

[0005] With the aid of the above technical solution, the present invention has the following beneficial effects:

[0006] (1) The sealing device realizes free compensation of thermal expansion in three-dimensional directions (X / Y / Z) through the composite structure of "gap filling + flexible sealing metal plate", avoiding the incoordination of pipeline deformation caused by thermal expansion restriction at the connection between the flue gas inlet pipeline and the flue gas desulfurization tower, resulting in damage and failure of the equipment.

[0007] (2) The sealing device provides static sealing and primary buffering through the inner sealing filler, and the outer sealing metal plate dynamically fits to adapt to displacement and prevent flue gas leakage, ensuring the sealing of the connection between the flue gas inlet pipeline and the flue gas desulfurization tower, achieving an ideal dynamic sealing effect.

[0008] Furthermore, a plurality of sealing metal plates distributed along the circumferential direction are respectively connected to the outer baffle plates.

[0009] The beneficial effect is that when one or more sealing metal plates are deformed or damaged during use, there is no need to dismantle the pipeline as a whole, and the pipeline can be dismantled and replaced in sections at any time.

[0010] Furthermore, an edge side of a sealing metal plate distributed in the circumferential direction is stacked on a corresponding edge side of another adjacent sealing metal plate distributed in the circumferential direction.

[0011] The beneficial effect is that the distance between the overlapping parts of the two edge sides can be appropriately changed so as to better fit the smoke inlet pipeline of corresponding size.

[0012] Furthermore, the outer baffle is annular and extends in the circumferential direction.

[0013] Furthermore, the outer edge and the outer baffle are detachably connected.

[0014] Furthermore, the outer edge and the outer baffle are reinforced by a bolt assembly.

[0015] Furthermore, the sealing filler is made of aluminum silicate fiber rope.

[0016] Furthermore, the sealing metal plate is made of 0.4 mm thick austenitic stainless steel plate.

[0017] The beneficial effects are: the sealing metal plate of this type has good elasticity, flexibility, high temperature resistance and corrosion resistance, and can absorb expansion in all directions.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a structural schematic diagram of a sealing connection device for a multi-directional free expansion pipeline.

[0020] Figure 2 yes Figure 1 Enlarged view of point Ⅰ in the middle.

[0021] Figure 3 yes Figure 1 Enlarged view of point II in the middle.

[0022] Figure 4 yes Figure 1 A-direction view.

[0023] Figure 5 The present invention is a front view of a sealing metal plate in a sealing connection device for a multi-directional free expansion pipeline when the sealing metal plate is not assembled.

[0024] [Reference Signs]

[0025] 1. Sealing metal plate; 101. Outer edge; 102. Inner edge; 103. Edge side; 104. Mounting hole; 2. Outer baffle; 3. Flue gas inlet pipeline; 4. Sealing filler; 5. Inlet pipe; 6. Inner baffle; 7. Reinforcement rib plate; 8. Flue gas desulfurization tower. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings:

[0027] See also Figure 1 The present invention provides a sealing connection device for a multi-directional free expansion pipeline, comprising a flue gas inlet pipeline 3 which is arranged obliquely relative to a flue gas desulfurization tower 8, which is subject to thermal expansion in both horizontal and vertical directions. In order to avoid interaction between the flue gas inlet pipeline 3 and the flue gas desulfurization tower 8, which may cause damage to the flue gas inlet pipeline 3 or local deformation of the tower body; the connection between the flue gas inlet pipeline 3 and the flue gas desulfurization tower 8 is mostly a movable connection. When the end of the flue gas inlet pipeline 3 is extended into the flue gas desulfurization tower 8, a certain gap is retained between the flue gas inlet pipeline 3 and the inlet pipe 5, and the gap width can be determined by calculation according to the thermal expansion amount. The gap is filled with a high-temperature resistant sealing filler 4 (the sealing filler can be: aluminum silicate fiber rope), which has excellent high-temperature stability and elasticity and can adapt to dynamic displacement; the inner end of the inlet pipe 5 and the end of the flue gas inlet pipeline 3 extending into the flue gas desulfurization tower are connected by an inner baffle 6, and the inner baffle 6 is tightly fitted with the sealing filler 4 to prevent the sealing filler 4 from falling off due to airflow impact or vibration (such as Figure 2 As shown); a reinforcing rib plate 7 is also provided at the connection between the inlet pipe 5 and the flue gas desulfurization tower 8.

[0028] The sealing connection device further includes an annular outer baffle plate 2 extending in the circumferential direction, and the outer baffle plate 2 is connected to the outer end of the inlet pipe 5. In this embodiment, the outer baffle plate 2 and the outer end of the inlet pipe 5 are connected by circumferential welding; and further includes a plurality of sealing metal plates 1 distributed in the circumferential direction, see Figure 5 When the sealing metal plate 1 is not assembled to the outer baffle plate 2, it is fan-shaped, with an outer edge 101 and an inner edge 102 distributed in the radial direction and an edge side 103 distributed in the circumferential direction. The outer edge 101 is provided with a mounting hole 104 for assembling the bolt assembly. The sealing metal plate 1 is made of a 0.4 mm thick austenitic stainless steel plate (for example, a steel plate with a model of S31603), which has good elasticity, flexibility, high temperature resistance and corrosion resistance, and can absorb expansion in all directions; when assembled to the outer baffle plate 2, such as Figure 3As shown, the outer edge 101 of the sealing metal plate 1 is connected to the outer baffle 2, the sealing metal plate 1 is turned toward the outer side of the smoke inlet pipeline 3 along the axial direction of the smoke inlet pipeline 3 and is tightly fitted with the sealing filler 4, and the inner edge 102 of the sealing metal plate 1 is tightly fitted with the outer wall of the smoke inlet pipeline 3 due to its own flexible characteristics. The sealing metal plate 1 using the above-mentioned assembly method can be elastically deformed when the pipeline is displaced horizontally (X / Y direction) and vertically (Z direction), thereby generating effective displacement compensation, and since the inner edge 102 of the sealing metal plate 1 is in real-time fit with the outer wall of the smoke inlet pipeline 3, dynamic sealing can be achieved to avoid smoke leakage; the sealing metal plate 1 in this embodiment After the outer edge 101 is connected to the outer baffle 2, a detachable bolt assembly (for example, a bolt with model number S31603) is used for reinforcement. The bolt assembly is evenly pressed on the outer baffle 2, and a spring washer or a thread locking glue is used to prevent the bolts from loosening due to high temperature vibration. Furthermore, in this embodiment, multiple sealing metal plates 1 are sequentially pressed by 20 mm and distributed circumferentially on the outer wall of the flue gas inlet pipeline 3. Specifically, the edge side 103 of one sealing metal plate 1 distributed along the circumferential direction is stacked on the corresponding edge side 103 of another adjacent sealing metal plate 1 distributed along the circumferential direction to form a continuous sealing surface. The overlapping width L1 of the two edge sides 103 is 20 mm (such as Figure 4 As shown in the figure, when one or more sealing metal plates 1 are deformed or damaged due to the long-term expansion of the flue gas inlet pipeline 3 and the flue gas desulfurization tower 8 during use, they can be disassembled and replaced in sections at any time. In addition, the width of the overlapping part of the two edge sides 103 can be appropriately changed to better fit the flue gas inlet pipeline 3 of the corresponding size.

[0029] With the aid of the aforementioned technical solution, the sealing connection device of the present invention can not only ensure the free expansion of the flue gas inlet pipeline 3 and the flue gas desulfurization tower 8, and prevent damage to the equipment or pipelines at the connection between the two; it can also ensure the dynamic sealing effect of the connection between the flue gas inlet pipeline 3 and the tower body, and avoid safety and environmental accidents caused by leakage of harmful gases.

[0030] In other embodiments of the present invention, a ring-shaped sealing metal plate 1 extending in the circumferential direction may replace the plurality of sealing metal plates 1 distributed in the circumferential direction in the present embodiment.

[0031] In other embodiments of the present invention, a plurality of outer baffles 2 distributed along the circumferential direction may be used to replace the one outer baffle 2 extending along the circumferential direction in this embodiment. The number of the outer baffles 2 is equal to the number of the sealing metal plates 1, and the two are connected correspondingly.

[0032] In other embodiments of the present invention, the outer edge of the sealing metal plate 1 can be directly welded to the outer baffle plate 2; or a detachable connection method can be used instead of welding, such as bolt connection.

[0033] In other embodiments of the present invention, other types of high temperature resistant sealing fillers 4 may be used to replace the aluminum silicate fiber rope for filling, for example, fire-resistant fiber cotton.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the design and scope of the technical solution of the present invention.

Claims

1. A sealing connection device for a multi-directional free expansion pipeline, characterized in that: The invention comprises a flue gas inlet pipeline (3) arranged obliquely relative to a flue gas desulfurization tower (8), a sealing filler (4) filled between the flue gas inlet pipeline (3) and an inlet pipe (5) of the flue gas desulfurization tower (8), wherein the inner end of the inlet pipe (5) and the end of the flue gas inlet pipeline (3) are connected via an inner baffle (6), and the inner baffle (6) and the sealing filler (4) are tightly fitted; and further comprises an outer baffle (2) and a sealing metal plate (1), wherein the outer baffle (2) is connected to the outer end of the inlet pipe (5), the outer edge (101) of the sealing metal plate (1) distributed along the radial direction is connected to the outer baffle (2), the sealing metal plate (1) is flanged outwardly along the axial direction of the flue gas inlet pipeline (3) and is tightly fitted with the sealing filler (4), and the inner edge (102) of the sealing metal plate (1) distributed along the radial direction is tightly fitted with the outer wall of the flue gas inlet pipeline (3).

2. A sealing connection device for a multi-directional free expansion pipeline according to claim 1, characterized in that: A plurality of sealing metal plates (1) distributed along the circumferential direction are respectively connected to the outer baffle plate (2).

3. A sealing connection device for a multi-directional free expansion pipeline according to claim 2, characterized in that: An edge side (103) of a sealing metal plate (1) distributed in the circumferential direction is stacked on a corresponding edge side (103) of another adjacent sealing metal plate (1) distributed in the circumferential direction.

4. A sealing connection device for a multi-directional free expansion pipeline according to claim 1, characterized in that: The outer baffle (2) is annular and extends in the circumferential direction.

5. A sealing connection device for a multi-directional free expansion pipeline according to claim 1, characterized in that: The outer edge (101) and the outer baffle (2) are detachably connected.

6. A sealing connection device for a multi-directional free expansion pipeline according to claim 1, characterized in that: The outer edge (101) and the outer baffle (2) are reinforced by a bolt assembly.

7. A sealing connection device for a multi-directional free-expandable pipeline according to any one of claims 1 to 6, characterized in that: The sealing filler (4) is made of aluminum silicate fiber rope.

8. A sealing connection device for a multi-directional free-expandable pipeline according to any one of claims 1 to 6, characterized in that: The sealing metal plate (1) is made of a 0.4 mm thick austenitic stainless steel plate.

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