An online leak sealing device for desulfurization towers

Abstract

This invention discloses an online leak-sealing device for desulfurization towers, relating to the field of desulfurization tower technology. It includes a straight-handled umbrella, the straight handle of which has a threaded section. A pressure plate and a nut are sequentially fitted onto the threaded section from the outside to the inside of the tower. The pressure plate and the threaded section are in a movable fit, and the nut and the threaded section are in a threaded fit. When the end of the umbrella surface contacts the pressure plate against the inner and outer walls of the tower, respectively, and the nut is driven to rotate from the outside to the inside of the tower, the straight handle moves outward from the inside to the outside of the tower, causing the end of the umbrella surface to press against the pressure plate against the inner and outer walls of the tower, respectively. This invention, through the cooperation of the straight-handled umbrella, pressure plate, and nut, allows all operations to be completed outside the tower. Specifically, by rotating the nut, the straight handle moves outward, causing the end of the umbrella surface and the pressure plate to simultaneously press against the tower walls from both the inside and outside of the tower. The installation process does not require personnel to enter the confined space inside the tower, making the operation convenient, safe, and reliable.

Description

Technical Field

[0001] This invention relates to the field of desulfurization tower technology, and more specifically to an online leak-sealing device for desulfurization towers. Background Technology

[0002] The desulfurization tower is a core piece of equipment in a boiler flue gas treatment system, primarily used for desulfurization and other purification treatments of the flue gas. The tower body is typically made of steel, with an inner wall lined with a glass flake mortar anti-corrosion layer, and is constructed by welding ring-shaped steel plates one ring at a time. Due to factors such as weld quality and defects in anti-corrosion construction, coupled with the long-term contact of the lower part of the tower with highly corrosive ammonium sulfate solution, the weld seams in this area are highly prone to leaks. Furthermore, improper nozzle angle adjustment during operation can also cause erosion corrosion of the tower wall, further exacerbating the risk of leakage. Because the desulfurization tower is a critical environmental protection device and must be used in conjunction with the boiler system, it is difficult to shut it down for maintenance at any time. Therefore, in actual operation, online leak sealing is often necessary without shutting down the system.

[0003] A search revealed that patent application number 202411553215.6 discloses a desulfurization tower anti-leakage device, which includes an anti-leakage component and a fixing component. The anti-leakage component includes an external pressure plate structure and a sealing element disposed at the bottom of the external pressure plate structure. The fixing component includes an internal beam plate and a locking structure disposed on the inner wall of the internal beam plate.

[0004] When in use, the aforementioned leak prevention device utilizes the tension created between the built-in beam plate and the arc plate by fastening bolts and nuts. The built-in beam plate and the arc plate clamp the outer wall of the desulfurization tower, sealing off the leakage area and achieving leak prevention.

[0005] However, in actual installation, the built-in beam plate needs to be inserted into the tower through the leak hole, and then personnel inside the tower must operate the nuts to tighten it. This means that personnel must enter the desulfurization tower or work in the confined space inside the tower. Since the desulfurization tower is a confined space, there may be dangers such as residual flue gas, toxic gases, and oxygen deficiency. Even after the boiler is shut down, strict procedures such as gas detection, ventilation, and monitoring must be followed. Therefore, the above-mentioned leak prevention device poses a great safety risk during use. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing an online leak-sealing device for desulfurization towers. By improving the leak-sealing structure in the prior art, the installation process does not require personnel to enter the confined space inside the tower, making the operation convenient, safe and reliable.

[0007] To address the above problems, the present invention provides the following technical solution: An online leak-sealing device for a desulfurization tower includes a straight-handled umbrella. The straight handle of the umbrella has a threaded section, and a pressure plate and a nut are sequentially fitted on the threaded section from the outside to the inside of the tower. The pressure plate is in a movable fit with the threaded section, and the nut is in a threaded fit with the threaded section. When the end of the umbrella surface contacts the pressure plate on the inner wall and the outer wall of the tower, respectively, and the nut is driven to rotate in the direction from the outside to the inside of the tower, the straight handle can move outward in the direction from the inside to the outside of the tower, so that the end of the umbrella surface and the pressure plate are pressed against the inner wall and the outer wall of the tower, respectively.

[0008] As a further aspect of the present invention: an airbag is provided on the straight handle, so that when the end of the umbrella surface and the pressure plate are respectively pressed against the inner wall and outer wall of the tower, the airbag is located inside the tower and relies on its inflated state to adhere to the periphery of the leakage point.

[0009] As a further aspect of the present invention: an inflation / deflation airflow channel is provided on the straight handle along its length direction, and the two ports of the inflation / deflation airflow channel are a first port located inside the tower and a second port located outside the tower, respectively, and the airbag is connected to the first port.

[0010] As a further aspect of the present invention, a plug is detachably provided at the second port of the charging / discharging airflow channel.

[0011] As a further aspect of the present invention: the charging and discharging airflow channel is cylindrical and coaxially arranged with the straight handle.

[0012] As a further aspect of the present invention: the airbag is configured as an annular shape and is located outside the straight handle rod by means of its inner ring sealing ring.

[0013] As a further aspect of the present invention, the airbag is an acid and alkali resistant rubber bag.

[0014] As a further aspect of the present invention, the umbrella surface of the straight-handled umbrella is provided with an anti-corrosion coating.

[0015] As a further aspect of the present invention, a sealing ring is provided on the side of the pressure plate facing the outer wall of the tower.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the cooperation of the straight handle umbrella, pressure plate and nut, all operations can be completed outside the tower; specifically: by screwing the nut in, the straight handle rod is moved outward, so that the end of the umbrella surface and the pressure plate are pressed against the tower wall from the inside and outside of the tower at the same time. The installation process does not require personnel to enter the confined space inside the tower, and the operation is convenient and safe.

[0017] 2. By adding an airbag to the straight handle, the area surrounding the leak point can be further sealed by the expansion of the airbag after the umbrella surface and the pressure plate are initially mechanically locked. The expansion of the airbag can adapt to the irregular tower wall surface around the leak hole, fill the tiny gaps, and form a flexible sealing layer independent of mechanical compression, thereby improving the overall reliability of leak sealing.

[0018] 3. By opening an inflation / deflation airflow channel inside the straight rod, the inflation port of the airbag is moved from inside the tower to outside the tower, so that the inflation operation of the airbag can also be safely completed outside the tower. This avoids the operational difficulties and safety hazards caused by setting the inflation port inside the tower, realizes the externalization of all operations, and further reduces the operational risks.

[0019] 4. By setting the airbag as a ring and relying on its inner ring sealing ring to be set outside the straight handle rod, it can be ensured that the airbag expands outward radially evenly when inflating, forming a full-range fit around the leakage hole.

[0020] 5. By using acid and alkali resistant rubber to make the airbags, they can resist the erosion of strong corrosive media such as ammonium sulfate solution in the desulfurization tower for a long time, and are not prone to aging, swelling or rupture.

[0021] 6. By applying an anti-corrosion coating to the umbrella surface, the umbrella surface itself can be effectively protected from direct erosion by corrosive media inside the tower, preventing it from corroding, thinning, or failing during long-term contact.

[0022] 7. By setting a sealing ring on the side of the pressure plate facing the outer wall of the tower, a reliable end face seal can be formed between the pressure plate and the outer wall of the tower. When the nut is tightened to press the pressure plate against the tower wall, the sealing ring is deformed by pressure, which can effectively seal the micro-unevenness of the outer surface of the tower wall and prevent the medium from leaking out from the contact interface between the pressure plate and the tower wall, forming double protection inside and outside with the gasbag seal inside the tower. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of a three-dimensional structure of a straight-handle umbrella in the prior art; Figure 2 This is a structural schematic diagram of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 4 This is a schematic cross-sectional view of the straight handle and airbag structure of the present invention; Figure 5 This is a top view schematic diagram of the assembly process of the straight handle and airbag of the present invention.

[0025] In the diagram: 1. Straight handle umbrella; 101. Straight handle rod; 1011. Threaded section; 1012. Inflation / discharge airflow channel; 102. Umbrella canopy; 103. Bent handle; 104. Push-button switch; 2. Pressure plate; 3. Nut; 4. Airbag; 5. Plug; 6. Anti-corrosion coating; 7. Sealing ring; a. Inner wall of the tower; b. Outer wall of the tower. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Figure 1 The diagram illustrates a conventional straight-handle umbrella structure, primarily comprising a straight handle (hollow tube or solid rod structure) 101, and an umbrella canopy 102 that can be folded or unfolded via a connecting rod structure (not shown). Optionally, a curved handle 103 can be provided at the end of the straight handle 101. Optionally, a push-button switch 104 is provided at the end of the straight handle 101, which, when pressed, switches the umbrella canopy 102 from the folded state to the unfolded state. Of course, if the push-button switch 104 is not provided at the end of the straight handle 101, the connecting rod structure needs to be manually operated or activated with external tools to open the umbrella. Furthermore, to avoid unnecessary detail, other structural features of the straight-handle umbrella 1 will not be described further here.

[0028] Example 1: like Figure 2 As shown, an online leak-sealing device for a desulfurization tower includes a straight-handle umbrella 1 as in the prior art, which includes a straight handle 101 and an umbrella surface 102. The difference is that in this embodiment, a threaded section 1011 is provided on the straight handle 101. A pressure plate 2 and a nut 3 are sequentially sleeved on the threaded section 1011. Specifically, the pressure plate 2 has a through hole, which allows the pressure plate 2 to be movably sleeved on the straight handle 101, that is, to achieve a movable fit between the pressure plate 2 and the threaded section 1011. The nut 3 has a threaded fit between its internal thread and the external thread on the threaded section 1011.

[0029] Taking the example where the straight-handle umbrella 1 does not have a push-button switch 104, when the straight-handle umbrella structure of this application needs to be applied to the leakage point of the desulfurization tower, the pressure plate 2 and nut 3 are not pre-installed on the threaded section 1011 of the straight handle rod 101. At this time, the straight handle umbrella 1 is passed through the leakage point along the direction from the outside of the tower to the inside of the tower until the umbrella surface 102 in the retracted state is moved into the tower. Then, the umbrella surface 102 is manually or with the help of tools switched to the unfolded state. Then, the straight handle rod 101 is pulled along the direction from the inside of the tower to the outside of the tower until the outer edge of the end of the umbrella surface 102 contacts the inner wall a of the tower. Then, the pressure plate is sequentially... 2. Nut 3 is fitted onto threaded section 1011, causing pressure plate 2 to abut against the outer wall b of the tower and nut 3 to abut against pressure plate 2. Then, nut 3 continues to be driven to rotate from the outside of the tower to the inside. Since pressure plate 2 is already in contact with the outer wall b, nut 3 cannot move further from the outside to the inside. Therefore, the rotation of nut 3 causes threaded section 1011 to move from the inside to the outside. During this process, umbrella surface 102 deforms accordingly, causing its end to press against the inner wall a of the tower, thus achieving the installation of the straight-handle umbrella 1 on the desulfurization tower. Simultaneously, under the protection of umbrella surface 102, the leak point is completely covered, achieving leak sealing. When subsequent spray nozzles spray towards the leak point, they will be blocked by umbrella surface 102. This blocking state can be achieved by… Figure 1 To represent it.

[0030] Taking the straight umbrella 1 with a push-button switch 104 as an example, during the manufacturing process, the pressure plate 2 and nut 3 need to be pre-fitted onto the threaded section 1011 before assembling the push-button switch 104. When the straight umbrella 1 of this application needs to be applied to the leak point of the desulfurization tower, as described above, the straight umbrella 1 is passed through the leak point until the pressure plate 2 touches the outer wall b of the tower. At this time, the umbrella surface 102 in the retracted state will be located inside the tower. Then, the push-button switch 104 is pressed, which will change the umbrella surface 102 from the retracted state to the unfolded state. The subsequent assembly steps are the same as described above.

[0031] To improve the tightness and sealing between the end of the umbrella surface 102 and the inner wall a of the tower, on the one hand, the shape and size of the umbrella surface 102 can be adapted to the shape of the inner wall of the desulfurization tower so that the end of the umbrella surface 102 can fit the shape of the inner wall a when it is pressed against the inner wall a, thus reducing the generation of gaps; on the other hand, a flexible sealing strip can be set at the end of the umbrella surface 102. When the end of the umbrella surface 102 is pressed against the inner wall a of the tower, the flexible sealing strip is located between the end of the umbrella surface 102 and the inner wall a of the tower, completely eliminating gaps.

[0032] Of course, other sealing methods from existing technologies can also be used in practical applications. For example, a sealing ring 7 can be provided on the side of the pressure plate 2 facing the outer wall b of the tower. When the pressure plate 2 is pressed against the outer wall b of the tower, the sealing ring 7 will enclose the leakage point in a ring shape, further improving the sealing effect. Similarly, in order to prevent leakage from the gap between the nut 3 and the threaded section 1011, this embodiment can provide packing between the nut 3 and the threaded section 1011 for sealing.

[0033] In summary, various sealing designs can effectively isolate leaks and prevent the escape of flue gas and other gases from the desulfurization tower. This application uses a straight-handled umbrella 1 to isolate leaks, which is convenient and quick to assemble. Furthermore, the assembly process does not require personnel to enter the tower, reducing the risk of accidents.

[0034] Example 2: like Figure 3 As shown, based on Embodiment 1, to improve the leakage point containment effect, this embodiment provides an airbag 4 on the outside of the straight rod 101. In the contracted state, the airbag 4 is attached to the outside of the straight rod 101, without occupying a large space; in the inflated state, the area of ​​the airbag 4 is larger than the leakage point. Based on the positional layout of the straight rod 101 after passing through the leakage point, the airbag 4 can be positioned at the location of the straight rod 101 inside the tower. It should be noted that the position of the airbag 4 on the straight rod 101 not only needs to be inside the tower, but also, in the inflated state, one side of the airbag 4 needs to be in contact with the outer perimeter of the leakage point, thereby achieving comprehensive coverage and leak prevention.

[0035] like Figures 4-5 As shown, in order to facilitate the inflation and deflation of the airbag 4, an inflation and deflation airflow channel 1012 is provided on the straight handle 101 along its length direction. In order to adapt to the position of the airbag 4 on the straight handle 101, the two ports of the inflation and deflation airflow channel 1012 are defined as the first port located inside the tower and the second port located outside the tower, respectively. At this time, the airbag 4 is connected to the first port; a plug 5 is detachably provided at the second port.

[0036] Preferably, the airbag 4 is configured as an annular shape. In this case, the annular airbag 4 is positioned outside the straight handle 101 by its inner sealing ring, ensuring a constant seal between the inner ring and the outside of the straight handle 101 during subsequent inflation. Further, the inflation / deflation airflow channel 1012 is configured as a circular shape and coaxially arranged with the straight handle 101. This configuration can be achieved by... Figure 4 To represent it. Figure 5 This can be represented as the assembly process of the annular airbag 4 and the straight handle 101.

[0037] When inflation is required, remove the plug 5 to expose the second port, use an air pump to inflate the second port until the airbag 4 is inflated, and then insert the plug 5 into the second port.

[0038] To enable the airbag 4 to operate for an extended period, this embodiment uses an acid and alkali resistant rubber bladder for the airbag 4. Similarly, to ensure that the canopy 102 can also operate for a long time, this embodiment provides an anti-corrosion coating 6 on the canopy 102 of the straight-handle umbrella 1. The anti-corrosion coating 6 is made of conventional materials in the prior art, such as epoxy zinc-rich primer and / or epoxy topcoat.

[0039] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An online leak-sealing device for a desulfurization tower, comprising a straight-handled umbrella (1), characterized in that, The straight handle (1) of the straight handle (101) has a threaded section (1011), and a pressure plate (2) and a nut (3) are sequentially fitted on the threaded section (1011) along the direction from the outside to the inside of the tower. The pressure plate (2) and the threaded section (1011) are in a movable fit relationship, and the nut (3) and the threaded section (1011) are in a threaded fit relationship. When the end of the umbrella surface (102) contacts the pressure plate (2) on the inner wall (a) and the outer wall (b) of the tower respectively, and the nut (3) is driven to make a screwing action along the direction from the outside to the inside of the tower, the straight handle (101) can make an outward movement along the direction from the inside to the outside of the tower, so that the end of the umbrella surface (102) and the pressure plate (2) are pressed against the inner wall (a) and the outer wall (b) of the tower respectively.

2. The online leak-sealing device for a desulfurization tower according to claim 1, characterized in that, An airbag (4) is provided on the straight handle (101) so that when the end of the umbrella surface (102) and the pressure plate (2) are pressed against the inner wall (a) and outer wall (b) of the tower respectively, the airbag (4) is located inside the tower and adheres to the periphery of the leakage point by its inflated state.

3. The online leak-sealing device for a desulfurization tower according to claim 2, characterized in that, The straight handle (101) has an airflow channel (1012) along its length, and the two ports of the airflow channel (1012) are the first port inside the tower and the second port outside the tower, respectively. The airbag (4) is connected to the first port.

4. The online leak-sealing device for a desulfurization tower according to claim 3, characterized in that, A plug (5) is detachably installed at the second port of the charging and discharging airflow channel (1012).

5. An online leak-sealing device for a desulfurization tower according to claim 3 or 4, characterized in that, The charging and discharging airflow channel (1012) is cylindrical and coaxial with the straight handle (101).

6. An online leak-sealing device for a desulfurization tower according to any one of claims 2-4, characterized in that, The airbag (4) is configured as an annular shape and is located outside the straight handle rod (101) by means of its inner ring sealing ring.

7. An online leak-sealing device for a desulfurization tower according to any one of claims 2-4, characterized in that, The airbag (4) is an acid and alkali resistant rubber bag.

8. An online leak-sealing device for a desulfurization tower according to any one of claims 1-4, characterized in that, The umbrella (1) with a straight handle has an anti-corrosion coating (6) on its canopy (102).

9. A desulfurization tower online leak-sealing device according to any one of claims 1-4, characterized in that, The pressure plate (2) is provided with a sealing ring (7) on the side facing the outer wall (b) of the tower.

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