A filter bag suitable for high humidity flue gas

Abstract

This invention provides a filter bag suitable for high-humidity flue gas, belonging to the field of environmental protection technology. It includes: a filter bag body, with a second filter bag disposed inside the filter bag body; an elastic expansion ring is disposed at the top of the filter bag body; a bag cage is disposed inside the second filter bag; an elastic connecting sleeve is installed on the outer side of the top of the bag cage; and a third filter seat is threadedly connected to the inner wall of the top of the bag cage; an adjustment component is disposed on the inner side of the filter bag body, used to adjust the second filter bag to a wavy surface; and an installation component is disposed at the top of the second filter bag, used to install the filter bag body. By guiding the first arc-shaped filter seat, the second arc-shaped filter seat, and the combination of the first and second connecting seats with arc-shaped hinge rods, the filter bag body and the second filter bag are adjusted to a wavy surface, increasing the contact area between the flue gas and the filter material, thereby reducing the initial resistance of the filter bag.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology, and in particular to a filter bag suitable for high-humidity flue gas. Background Technology

[0002] High-humidity flue gas filter bags are a type of filter medium specifically designed to treat industrial flue gas with temperatures close to or below the dew point, high water content, and the potential presence of acidic condensates. Through special fiber materials, filter media structure, surface treatment, and supporting processes, they can effectively prevent filter bag caking, clogging, and corrosion caused by water vapor condensation, ensuring long-term stable operation and efficient filtration of the dust removal system under harsh humidity conditions.

[0003] In existing filter bag structures, most filter bags used for filtering high-humidity flue gas require deep processing. This results in a generally high initial resistance on the filter bag surface before dust removal, requiring the fan to consume more energy to overcome this resistance, thus reducing the operational stability of the filtration system. Furthermore, after prolonged use, the filtration system's performance deteriorates, allowing finer dust particles to enter and be discharged. Additionally, filter bags typically require manual tightening of the elastic expansion ring during installation. Uneven tightening force prevents the formation of a continuous, pressure-uniform annular seal between the expansion ring and the dust collector's perforated plate, further reducing the filter bag's sealing performance. Therefore, this application provides a filter bag suitable for high-humidity flue gas to meet these requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a filter bag suitable for high humidity flue gas, so as to solve the problems of high initial surface resistance of existing filter bags, which leads to unstable operation of the filtration system, reduced performance of the filtration system after long-term use of the filter bag, fine dust entering the interior of the filter bag, and uneven force when manually tightening the elastic expansion ring, resulting in reduced sealing performance.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A filter bag suitable for high-humidity flue gas includes: a filter bag body, a second filter bag disposed inside the filter bag body, an elastic expansion ring disposed at the top of the filter bag body, a bag cage disposed inside the second filter bag, an elastic connecting sleeve installed on the outer side of the top of the bag cage, and a third filter seat threadedly connected to the inner wall of the top of the bag cage; an adjustment component disposed on the inner side of the filter bag body, the adjustment component being used to adjust the second filter bag to a wavy surface; and an installation component disposed at the top of the second filter bag, the installation component being used to install the filter bag body.

[0007] Optionally, the adjustment assembly includes a plurality of first arc-shaped filter seats, each of which is bonded to the inner side of the filter bag body. The plurality of first arc-shaped filter seats are arranged in a ring array on the inner side of the filter bag body. A plurality of second arc-shaped filter seats are bonded to the inner side of the filter bag body. The plurality of second arc-shaped filter seats are arranged in a ring array on the inner side of the filter bag body. The first arc-shaped filter seats and arc-shaped hinge rods are alternately distributed.

[0008] Optionally, the adjustment assembly further includes a plurality of first connecting seats, which are adhered to the outside of the second filter bag and arranged in a circular array on the outside of the second filter bag. Each first connecting seat is engaged with a first arc-shaped filter seat.

[0009] Optionally, the adjustment assembly further includes a plurality of second connecting seats, each of which is adhered to the outside of the second filter bag, and each second connecting seat is engaged with the second arc-shaped filter seat.

[0010] Optionally, the adjustment assembly further includes a plurality of arc-shaped hinge rods, which are respectively installed at the top and bottom of the inner side of the second filter bag. Each arc-shaped hinge rod is hinged to the bag cage. A plurality of support rods are installed at the top and bottom of the inner side of the second filter bag. The arc-shaped hinge rods and support rods are alternately distributed, and each support rod is fixedly connected to the bag cage.

[0011] Optionally, the mounting assembly further includes a mounting ring, which is adhered to the top of the filter bag body. A trapezoidal groove is provided on the inner side of the bottom end of the mounting ring, which engages with an elastic expansion ring. Several sliding grooves are provided on the outer side of the bottom end of the mounting ring, and a tightening seat is slidably connected inside each sliding groove.

[0012] Optionally, the mounting assembly further includes a plurality of eccentric holes, each of which is opened at one end of the tightening seat. A steel wire rope passes through the inner wall of the plurality of eccentric holes, and one end of the steel wire rope passes through the top outer wall of the mounting ring and is fixedly connected to a pull ring.

[0013] Optionally, the mounting assembly further includes a return spring, which is mounted on the outer side of the bottom end of the mounting ring, and the other end of the return spring is fixedly connected to the other end of the wire rope.

[0014] Optionally, the mounting assembly further includes several limiting seats, which are fixedly connected to the outer side of the top end of the mounting ring. Several engaging holes are provided on the inner side of the top end of the mounting ring, and the engaging holes are arranged in a ring array at the top end of the mounting ring.

[0015] Optionally, the mounting assembly further includes a sealing seat, which is adhered to the top of the second filter bag, and a plurality of engaging rods are fixedly connected to the bottom outer side of the sealing seat, the engaging rods engaging with engaging holes.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above solution, the first arc-shaped filter seat, the second arc-shaped filter seat, and the first and second connecting seats are guided by arc-shaped hinge rods and support rods, respectively, to adjust the filter bag body and the second filter bag to a wavy surface. Compared with traditional flat filter bags, the wavy structure significantly increases the contact area between flue gas and filter media, reduces the airflow pressure per unit area of ​​filter media, thereby reducing the initial resistance of the filter bag, reducing fan energy consumption, and avoiding fluctuations in the operation of the filtration system due to excessive resistance. At the same time, the arc-shaped hinge rods can not only support the filter bag, but also guide the airflow evenly through the gaps between the filter bags, reduce the accumulation of high-humidity dust, further reduce airflow resistance, and ensure the long-term stable operation of the system.

[0018] The corrugated surfaces of the filter bag body and the second filter bag form an alternating channel. When high-humidity flue gas flows through, the airflow forms a slight vortex in the grooves, reducing the residence time of water vapor on the filter material surface and preventing condensation from accumulating and forming a liquid film. At the same time, the raised structure increases the contact area between the filter material and the airflow, reducing the dust adhesion density per unit area and fundamentally reducing the risk of high-humidity dust caking and clogging. It is especially suitable for extreme working conditions with high relative humidity. Combined with the hydrophobic coating of the filter material itself, the guiding effect of the corrugated structure allows condensate to slide quickly down the surface of the filter bag, preventing it from seeping into the filter material and causing the fibers to become damp and hard. Moreover, the corrugated structure reduces the contact pressure between dust and filter material. Even if a small amount of water vapor condenses, it is not easy to form a dust and water adhesion layer, ensuring long-term stable air permeability of the filter bag.

[0019] By combining steel wire ropes, pull rings, and tightening seats, the elastic expansion ring is synchronously squeezed inward, allowing it to fit closely against the dust collector's tube sheet holes. This forms a continuous, uniformly pressured annular seal, avoiding the seal failure caused by uneven manual tightening and improving the device's sealing efficiency. The alternating distribution of the arc-shaped hinge rods and support rods in the adjustment component provides multi-point uniform support for the filter bag, preventing localized stress concentration during high-humidity flue gas impact or pulse cleaning. Compared to flat filter bags, the corrugated structure disperses the tension generated by airflow impact, reducing fatigue damage caused by repeated stretching. Especially in high-frequency pulse cleaning systems, this extends the service life. The contact area of ​​the corrugated structure is adjustable. By finely adjusting the hinge angle of the arc-shaped hinge rods, the corrugated protrusion amplitude can be increased when the flue gas dust concentration is high, increasing the filtration capacity per unit time; when the dust concentration is low, the protrusion amplitude can be reduced, lowering airflow resistance and adapting to a wider range of dust concentrations.

[0020] By employing a multi-layered filtration system consisting of a filter bag body, a second filter bag, and a third filter base, the filter bag body intercepts large dust particles. The second filter bag then specifically filters oil from the flue gas, preventing oil pollution emissions. Finally, the third filter base further intercepts any remaining fine impurities. This system solves the problems of decreased filtration performance and fine dust leakage that occur with existing filter bags after long-term use, significantly improving overall filtration efficiency and ensuring the cleanliness of the exhaust gas. The structural design of the installation components is compatible with traditional filter bag installation interfaces, eliminating the need to modify the existing dust collector's tube sheet, support structure, or other structures. Simply replacing the existing filter bags is sufficient for operation, reducing the cost and difficulty of equipment upgrades for businesses. Attached Figure Description

[0021] Figure 1 A frontal three-dimensional structural diagram of a filter bag suitable for high-humidity flue gas;

[0022] Figure 2 A three-dimensional cross-sectional view of a filter bag suitable for high-humidity flue gas, taken from below.

[0023] Figure 3 A three-dimensional structural diagram of the filter bag body and its mounting components;

[0024] Figure 4 A three-dimensional structural diagram of the adjustment components and the mounting components;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of the adjustment component;

[0026] Figure 6 A schematic diagram of the unfolded three-dimensional structure of the adjustment component;

[0027] Figure 7 A three-dimensional cross-sectional structural diagram of the installation components;

[0028] Figure 8 for Figure 2 Enlarged 3D structural diagram at point A in the middle;

[0029] Figure 9 for Figure 3 Enlarged 3D structural diagram at point B;

[0030] Figure 10 for Figure 5 Enlarged 3D structural diagram at point C;

[0031] Figure 11 for Figure 7 Enlarged 3D structural diagram at point D.

[0032] Figure label:

[0033] 1. Filter bag body; 2. Second filter bag; 3. Bag cage; 4. Adjustment assembly; 401. First arc-shaped filter seat; 402. First connecting seat; 403. Arc-shaped hinge rod; 404. Second arc-shaped filter seat; 405. Second connecting seat; 406. Support rod; 5. Elastic connecting sleeve; 6. Elastic expansion ring; 7. Installation assembly; 701. Installation ring; 702. Trapezoidal groove; 703. Sliding groove; 704. Tightening seat; 705. Eccentric hole; 706. Steel wire rope; 707. Pull ring; 708. Return spring; 709. Limit seat; 710. Engaging hole; 711. Sealing seat; 712. Engaging rod; 8. Third filter seat.

[0034] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0035] The filter bag for high-humidity flue gas provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0036] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0037] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0038] It is understood that the meanings of “on”, “above” and “above” in this disclosure should be interpreted in the broadest sense, such that “on” means not only “directly on” something, but also includes something with an intermediary feature or layer, and that “above” or “above” means not only “on” something, but also includes something “above” or “above” without an intermediary feature or layer.

[0039] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0040] like Figures 1 to 11 As shown, an embodiment of the present invention provides a filter bag suitable for high-humidity flue gas, comprising: a filter bag body 1, a second filter bag 2 disposed inside the filter bag body 1, the second filter bag 2 being used to filter oil inside the flue gas to prevent oily gas from being discharged into the air, an elastic expansion ring 6 disposed at the top of the filter bag body 1, a sealing gasket disposed on the surface of the elastic expansion ring 6 to ensure the sealing performance of the elastic expansion ring 6, a bag cage 3 disposed inside the second filter bag 2, an elastic connecting sleeve 5 installed on the outside of the top of the bag cage 3, the elastic connecting sleeve 5 at the top of the bag cage 3 being used to seal the connection between the bag cage 3 and the sealing seat 711, and a third filter seat 8 threadedly connected to the inner wall of the top of the bag cage 3, the third filter seat 8 being rigid. This dust filter holder is used to filter fine dust and improve the filtration efficiency of the filtration system. The inner side of the filter bag body 1 is provided with an adjustment component 4, which is used to adjust the second filter bag 2 to a wavy surface. The top of the second filter bag 2 is provided with an installation component 7, which is used to install the filter bag body 1. The filter bag body 1 is made of PTFE (polytetrafluoroethylene) membrane fiberglass cloth, and the surface membrane pore size is controlled at 0.2-0.5μm, which has both acid corrosion resistance and hydrophobic properties, avoiding the erosion of the filter material by high sulfur condensate. The second filter bag 2 is made of expanded PTFE fiber felt with added nano silica hydrophobic coating, and the static contact angle is ≥150°, which greatly reduces the risk of water vapor adsorption and caking.

[0041] like Figures 2 to 10As shown, the adjusting component 4 includes several first arc-shaped filter seats 401, each of which is bonded to the inner side of the filter bag body 1. These first arc-shaped filter seats 401 are arranged in a circular array inside the filter bag body 1. Several second arc-shaped filter seats 404 are bonded to the inner side of the filter bag body 1. The inner wall of each first arc-shaped filter seat 401 has a T-shaped seat, and the inner side of the first connecting seat 402 has a locking groove for connecting the first arc-shaped filter seat 401 to the first connecting seat 402. The inner side of each second arc-shaped filter seat 404 has an elastic locking seat, and the second connecting seat 405 has a locking groove. Pressure is applied through the elastic locking seat, causing the locking seat to enter the locking groove, thereby connecting the second arc-shaped filter seat 404. The first arc-shaped filter seat 404 is fixed together with the second connecting seat 405. The second arc-shaped filter seat 404 is engaged and fixed with the second connecting seat 405. Several second arc-shaped filter seats 404 are arranged in a ring on the inner side of the filter bag body 1. The first arc-shaped filter seat 401 and the arc-shaped hinge rod 403 are alternately distributed. The adjustment component 4 also includes several first connecting seats 402, which are bonded to the outer side of the second filter bag 2. Several first connecting seats 402 are arranged in a ring on the outer side of the second filter bag 2. Each first connecting seat 402 is engaged and connected with the first arc-shaped filter seat 401. The adjustment component 4 also includes several second connecting seats 405, which are bonded to the second arc-shaped filter seat 401. On the outside of the filter bag 2, each second connecting seat 405 is engaged with the second arc-shaped filter seat 404. The adjusting assembly 4 also includes several arc-shaped hinge rods 403. The arc-shaped hinge rods 403 support and reduce local stress concentration in the filter bag, preventing the expansion of micro-cracks caused by embrittlement of the filter bag under high humidity. At the same time, they guide the airflow near the arc-shaped hinge rods 403, reducing the accumulation of high-humidity dust in the gap between the bag cage 3 and the filter bag. The connection between the hinge seat of the arc-shaped hinge rod 403 and the second filter bag 2 is engaged and fixed by a U-shaped rod. At the same time, the support rod 406 is engaged and fixed with the second filter bag 2 by a U-shaped rod, thereby facilitating the disassembly and replacement of the second filter bag 2. The several arc-shaped hinge rods 403 respectively Installed on the top and bottom of the inner side of the second filter bag 2, each arc-shaped hinge rod 403 is hinged to the bag cage 3. Several support rods 406 are installed on the top and bottom of the inner side of the second filter bag 2. The arc-shaped hinge rods 403 and support rods 406 are distributed alternately. Each support rod 406 is fixedly connected to the bag cage 3. The arc curvature of the first arc-shaped filter seat 401 and the second arc-shaped filter seat 404 is 1:2.5. The height of the wavy protrusion is one-quarter of the diameter of the filter bag, further expanding the contact area. The arc-shaped hinge rod 403 is made of 316L stainless steel and coated with a polyurea anti-corrosion layer. A fluororubber sealing ring is added at the connection between the support rod 406 and the bag cage 3 to prevent acidic condensate from seeping into the gaps and causing corrosion.

[0042] like Figures 2 to 11As shown, the mounting assembly 7 also includes a mounting ring 701, which is adhered to the top of the filter bag body 1. A trapezoidal groove 702 is formed on the inner side of the bottom end of the mounting ring 701. Both the inner and outer sides of the trapezoidal groove 702 are inclined, resulting in a structure that is narrower at the top and wider at the bottom. The top width of the trapezoidal groove 702 is slightly less than the thickness of the elastic expansion ring 6, while the bottom width is slightly greater than the thickness of the elastic expansion ring 6. The two end sidewalls of the trapezoidal groove 702 are vertical, making them flush and fitted with the two ends of the elastic expansion ring 6. This allows the elastic expansion ring 6 to engage inside the trapezoidal groove 702, thus connecting the trapezoidal groove 702 with the elastic expansion ring 6. The bottom outer side of the mounting ring 701 has several sliding grooves 703, and a tightening seat 704 is slidably connected inside each sliding groove 703. The mounting assembly 7 also includes several eccentric holes 705. The sliding grooves 703 are connected to the inner wall of the trapezoidal slots 702. When the wire rope 706 is in a slack state, the wire rope 706 is located outside the eccentric hole 705. When the wire rope 706 moves inward, it gradually moves towards the inner surface of the eccentric hole 705, causing the tightening seat 704 to retract inward. At the same time, the other end of the tightening seat 704 compresses the elastic expansion ring 6. Several eccentric holes 705 are respectively opened at one end of the tightening seat 704, and the inner walls of the several eccentric holes 705 are... A steel wire rope 706 passes through the mounting ring 701. One end of the steel wire rope 706 passes through the top outer wall of the mounting ring 701 and is fixedly connected to a pull ring 707. The mounting assembly 7 also includes a return spring 708, which is installed on the outer side of the bottom end of the mounting ring 701. The other end of the return spring 708 is fixedly connected to the other end of the steel wire rope 706. The mounting assembly 7 also includes several limiting seats 709, which are fixedly connected to the outer side of the top end of the mounting ring 701. Several engaging holes 710 are opened on the inner side of the top end of the mounting ring 701, and the engaging holes 710 are arranged in a ring array at the top end of the mounting ring 701. The mounting assembly 7 also includes a sealing seat 711, which is composed of two rings. The outer dimension of the ring is larger than that of the bottom ring. The bottom surface of the top ring is fixedly connected to the locking rod 712, and the outer wall of the bottom ring is provided with a sealing gasket for sealing. The sealing seat 711 is bonded to the top of the second filter bag 2. Several locking rods 712 are fixedly connected to the bottom outer side of the sealing seat 711. The locking rods 712 are engaged with the locking holes 710. The elastic expansion ring 6 adopts a composite structure of fluororubber and metal skeleton, with an internally embedded annular shape memory alloy sheet. It maintains elastic stability in the range of -20℃ to 120℃, avoiding aging and deformation in high humidity environments. The surface of the locking rods 712 of the sealing seat 711 is provided with a PTFE coating, and the inner wall of the locking hole 710 is equipped with an elastic wear-resistant sleeve to improve the sealing reliability after repeated disassembly and assembly.

[0043] The working principle of the technical solution provided by this invention is as follows:

[0044] During operation, the elastic expansion ring 6 is engaged from bottom to top into the trapezoidal slot 702. Then, the filter bag body 1 is placed from top to bottom into the tube sheet hole of the dust collector. Simultaneously, the pull ring 707 is manually pulled upwards, causing the wire rope 706 to move upwards and tighten. At the same time, the return spring 708 begins to stretch, which in turn causes the tightening seat 704 to tighten via the wire rope 706. The tightening seat 704 applies pressure to the elastic expansion ring 6, reducing the diameter of the lower half of the elastic expansion ring 6. The reduced portion of the elastic expansion ring 6 is then engaged into the tube sheet hole. The pull ring 707 is then fitted onto the outside of the appropriate limiting seat 709. Once the mounting ring 701 is in contact with the top of the tube sheet hole, the pull ring 707 is... 07 separates from the limiting seat 709. At this time, the reset spring 708 begins to reset and drives the wire rope 706 to relax. The wire rope 706 drives the pull ring 707 to relax, so that the lower half of the elastic expansion ring 6 returns to its original shape and fits against the inner wall of the perforated plate hole. At this time, the bag cage 3 is placed inside the second filter bag 2, so that the elastic connecting sleeve 5 at the top of the bag cage 3 fits against the inner wall of the sealing seat 711. Then, the second filter bag 2 is placed inside the filter bag body 1, so that the locking rod 712 at the bottom of the sealing seat 711 is locked together with the locking hole 710. Then, the first arc-shaped filter seat 401 is locked together with the first connecting seat 402, and the second arc-shaped filter seat 404 is locked together with the second connecting seat 405.

[0045] Furthermore, when the dust collector starts dust removal, the fan begins to operate, creating a negative pressure area outside the filter bag body 1 while the internal air pressure remains normal. This creates a pressure difference between the inside and outside of the filter bag body 1. The air inside the filter bag body 1 exerts pressure on the air outside. Because the filter bag body 1 is confined to the cage 3, it cannot expand. Simultaneously, the pressure exerted by the outside air on the filter bag body 1 causes the surface of the filter bag body 1 at the first arc-shaped filter seat 401 to contract inwards. This contraction of the first arc-shaped filter seat 401, in turn, rotates the arc-shaped hinge rod 403. At this time, the second arc-shaped... The surface of the filter bag body 1 at the filter seat 404 remains unchanged, thus forming a ring-shaped wavy surface. The contact area of ​​the wavy structure is adjustable, and the angle can be finely adjusted by setting the hinge method of the arc-shaped hinge rod 403. When the dust concentration of the flue gas is high, the amplitude of the wavy protrusion can be increased to increase the filtration capacity per unit time. When the dust concentration is low, the amplitude of the protrusion can be reduced to reduce the airflow resistance. It can adapt to different dust concentration operating conditions. At this time, the dust on the outside is blocked on the outside of the filter bag body 1. The purified airflow enters the bag cage 3 after secondary filtration through the second filter bag 2. After passing through the bag cage 3, the airflow moves upward and is filtered for the third time by the third filter seat 8, and is finally discharged.

[0046] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0047] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A filter bag suitable for high-humidity flue gas, characterized in that, include: The filter bag body has a second filter bag inside, an elastic expansion ring at the top of the filter bag body, a bag cage inside the second filter bag, an elastic connecting sleeve installed on the outside of the top of the bag cage, and a third filter seat threadedly connected to the inner wall of the top of the bag cage. An adjustment component is provided on the inner side of the filter bag body, which is used to adjust the second filter bag into a wavy surface; The top of the second filter bag is provided with an installation component, which is used to install the filter bag body; The adjustment assembly includes a plurality of first arc-shaped filter seats, each of which is bonded to the inner side of the filter bag body. The plurality of first arc-shaped filter seats are arranged in a ring array on the inner side of the filter bag body. A plurality of second arc-shaped filter seats are bonded to the inner side of the filter bag body. The plurality of second arc-shaped filter seats are arranged in a ring array on the inner side of the filter bag body. The first arc-shaped filter seats and arc-shaped hinge rods are alternately distributed. The adjustment assembly also includes a plurality of first connecting seats, which are bonded to the outside of the second filter bag. The plurality of first connecting seats are arranged in a ring array on the outside of the second filter bag, and each first connecting seat is engaged with a first arc-shaped filter seat. The adjustment assembly also includes a plurality of second connecting seats, each of which is adhered to the outside of the second filter bag, and each second connecting seat is engaged with the second arc-shaped filter seat. The adjustment assembly also includes several arc-shaped hinge rods, which are respectively installed at the top and bottom of the inner side of the second filter bag. Each arc-shaped hinge rod is hinged to the bag cage. Several support rods are installed at the top and bottom of the inner side of the second filter bag. The arc-shaped hinge rods and support rods are alternately distributed, and each support rod is fixedly connected to the bag cage.

2. The filter bag for high-humidity flue gas according to claim 1, characterized in that, The installation assembly also includes an installation ring, which is adhered to the top of the filter bag body. The bottom inner side of the installation ring has a trapezoidal groove that engages with an elastic expansion ring. The bottom outer side of the installation ring has several sliding grooves, and each sliding groove has a tightening seat slidably connected inside.

3. The filter bag for high-humidity flue gas according to claim 2, characterized in that, The mounting assembly also includes several eccentric holes, each of which is located at one end of the tightening seat. A steel wire rope passes through the inner wall of each eccentric hole, and one end of the steel wire rope passes through the top outer wall of the mounting ring and is fixedly connected to a pull ring.

4. The filter bag for high-humidity flue gas according to claim 3, characterized in that, The mounting assembly also includes a return spring, which is mounted on the outer side of the bottom end of the mounting ring, and the other end of the return spring is fixedly connected to the other end of the wire rope.

5. The filter bag for high-humidity flue gas according to claim 4, characterized in that, The mounting assembly also includes several limiting seats, which are fixedly connected to the outer side of the top end of the mounting ring. Several engaging holes are provided on the inner side of the top end of the mounting ring, and the engaging holes are arranged in a ring array at the top end of the mounting ring.

6. The filter bag for high-humidity flue gas according to claim 5, characterized in that, The installation assembly also includes a sealing seat, which is adhered to the top of the second filter bag. Several locking rods are fixedly connected to the bottom outer side of the sealing seat, and the locking rods engage with locking holes.

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