Bag cage

Abstract

The utility model provides a bag cage with a dioxin removal function. The bag cage comprises a mounting plate, a plurality of longitudinal ribs, a plurality of transverse catalysis nets and a supporting base, the mounting plate and the supporting base are located at the top and the bottom of the bag cage respectively, the upper ends and the lower ends of the longitudinal bars are connected to the mounting plate and the supporting base respectively, and the longitudinal bars are arranged at intervals and define a cage body with the mounting plate and the supporting base; the longitudinal ribs are made of metal, one half of one side, close to the filter bag, of each longitudinal rib is a solid structure part, one half of one side, far away from the filter bag, of each longitudinal rib is a hollow structure part, a plurality of small holes are distributed in the surface of each longitudinal rib of the hollow structure part, and the hollow structure part is filled with a catalyst for converting dioxin into harmless substances; the transverse catalytic nets are made of metal materials, the outer peripheries of the transverse catalytic nets are connected to the inner sides of the longitudinal ribs, the transverse catalytic nets are connected to the inner sides of the longitudinal ribs and distributed in parallel at intervals in the vertical direction of the longitudinal ribs, and catalysts used for converting dioxin into harmless substances are attached to the transverse catalytic nets.

Description

Technical Field

[0001] The utility model relates to the technical field of dioxin removal and dust removal devices, and more specifically to a bag cage. Background Art

[0002] Existing bag cage frames typically serve as components for securing filter bags and connecting flower plates. They only maintain a certain tension during filtration and do not filter flue gas. When using filter bags to treat flue gas generated by waste incineration, which contains dioxins, the traditional method for removing dioxins from the flue gas is to attach a catalyst to the filter bag surface or combine it with the bag fibers. The catalyst is typically a Mn-based catalyst. This catalyst utilizes its catalytic oxidation properties to simultaneously oxidize dioxins while filtering the flue gas, converting them into harmless substances.

[0003] However, due to the poor adhesion of conventional catalysts to the filter bag surface, this method is limited in its ability to remove dioxins. Furthermore, the operating temperature of the catalyst is limited by the heat resistance of the filter bag material, which cannot meet the higher operating temperatures of conventional catalysts. Consequently, the catalytic oxidation and decomposition efficiency of dioxins is insufficient, preventing efficient and thorough dioxin removal. Due to these circumstances, the prior art uses modified low-temperature catalysts to treat dioxins. While these modified low-temperature catalysts can meet the operating temperature requirements, they are complex and expensive to produce, leading to increased costs. This is the reason for this case. Utility Model Content

[0004] The purpose of the utility model is to provide a bag cage with dioxin removal function.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A bag cage, supported in a filter bag, comprising: a mounting plate, a plurality of longitudinal ribs, a plurality of transverse catalytic screens, and a support base;

[0007] The mounting plate and the support base are located at the top and bottom of the bag cage respectively. The upper and lower ends of the longitudinal ribs are connected to the mounting plate and the support base respectively. Several longitudinal ribs are arranged at intervals and surround the mounting plate and the support base to form a cage body.

[0008] The longitudinal ribs are made of metal. The half of the longitudinal rib near the filter bag is a solid structure, and the half of the longitudinal rib far from the filter bag is a hollow structure. The surface of the longitudinal rib in the hollow structure is distributed with multiple small holes. The hollow structure is filled with a catalyst used to convert dioxins into harmless substances.

[0009] The transverse catalytic mesh is made of metal and its outer periphery is connected to the inner side of the longitudinal ribs. The transverse catalytic mesh is connected to the inner sides of several longitudinal ribs and is spaced and parallel in the vertical direction of the longitudinal ribs. A catalyst for converting dioxins into harmless substances is attached to the transverse catalytic mesh.

[0010] Furthermore, the catalyst is a Mn-based catalyst.

[0011] Furthermore, a plurality of micron-sized pores are distributed on the surface of the longitudinal ribs of the hollow structure portion, and the powdered Mn-based catalyst is filled in or attached to the micron-sized pores of the hollow structure portion.

[0012] Furthermore, half of the volume of the longitudinal reinforcement along the length direction forms a solid structural part of the entity, and the other half of the volume of the longitudinal reinforcement forms a hollow structural part through a long tube sheet connected to the outside of the solid structural part, and a plurality of small holes are distributed on the long tube sheet.

[0013] Furthermore, the outer periphery of the transverse catalytic mesh forms transverse ribs, the middle portion forms a metal mesh, and the transverse ribs are connected to the inner sides of the longitudinal ribs.

[0014] Furthermore, a plurality of longitudinal ribs are arranged in a circumference and form a cylindrical cage together with the mounting plate and the support base, and the transverse catalytic mesh is circular.

[0015] Furthermore, a pipe with a central passage is protruding downward from the middle of the mounting plate. The mounting plate includes an outer ring at the upper end and an inner ring arranged on the inner side of the bottom of the outer ring. The outer ring is tightly connected to the flower plate, and the top end of the longitudinal rib is connected to the inner ring.

[0016] After adopting the above solution, the utility model improves the transverse and longitudinal rib structures of the traditional bag cage, sets half of the longitudinal ribs as a hollow structure and fills it with catalyst, and replaces the transverse ribs with a transverse catalytic mesh with catalyst attached. The bag cage of the utility model has the following advantages:

[0017] 1. Dioxins in the flue gas are removed once by the catalyst on the surface of the filter bag, and then removed twice by the longitudinal ribs of the bag cage and the transverse catalytic net, which improves the dioxin removal efficiency.

[0018] 2. As the flue gas filtration process proceeds, high-temperature flue gas can easily cause the filter bag to shrink and age, destroying the filter bag's primary dioxin removal effect. The longitudinal ribs and transverse catalytic mesh of the bag cage are made of metal, which has excellent thermal conductivity. They can enhance the reaction activity of the catalyst and increase the movement rate of dioxin molecules, increase the number of collisions between the catalyst and dioxin molecules, accelerate the degradation process of dioxins in the secondary removal, and reduce the content of dioxins emitted into the atmosphere.

[0019] 3. Based on the above point 2, the bag cage of the utility model does not need to use a modified low-temperature catalyst with high cost and complicated process, thus reducing the cost of removing dioxins. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the bag cage of the utility model.

[0021] Figure 2 It is a structural diagram of the longitudinal reinforcement of the utility model.

[0022] Description of Figure Numbers:

[0023] 10 Bag cage; 1 Mounting plate; 11 Outer ring; 12 Inner ring; 2 Longitudinal ribs; 21 Solid structure part; 22 Hollow structure part; 221 Small holes; 3 Horizontal catalytic mesh; 31 Transverse ribs; 32 Metal mesh; 4 Support base; a Side close to the filter bag; b Side far from the filter bag. DETAILED DESCRIPTION

[0024] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0025] See Figure 1 、 Figure 2 As shown, the utility model discloses a bag cage 10, which is used to support the filter bag (not shown in the figure), plays the role of fixing the filter bag, connecting the flower plate, and ensuring a certain tension range of the filter bag during filtering.

[0026] The bag cage 10 of the present invention comprises: a mounting plate 1, a plurality of longitudinal ribs 2, a plurality of transverse catalytic screens 3, and a support base 4. The mounting plate 1 is located at the top of the bag cage 10 and is made of metal. The support base 4 is located at the bottom of the bag cage 10. The upper ends of the longitudinal ribs 1 are connected to the mounting plate 1, and the lower ends of the longitudinal ribs 2 are connected to the support base 4. The longitudinal ribs 2 are arranged at intervals and form a cage body together with the mounting plate 1 and the support base 4.

[0027] In this utility model, the longitudinal ribs 2 are made of metal. The half of the longitudinal rib 2 on the side a near the filter bag is a solid structural portion 21, while the half of the longitudinal rib 2 on the side b far from the filter bag is a hollow structural portion 22. Multiple small holes 221 are distributed on the surface of the longitudinal rib 2 in the hollow structural portion 22. The hollow structural portion 22 is filled with a catalyst for converting dioxins into harmless substances. The transverse catalytic mesh 3 is made of metal and has a smooth, burr-free outer edge. The transverse catalytic mesh 3 is connected to the inner side of several longitudinal ribs 2 and is spaced parallel to the longitudinal ribs 1 in the vertical direction. The catalyst for converting dioxins into harmless substances is attached to the transverse catalytic mesh 3.

[0028] In the above structure, the half of the longitudinal rib 2 near the filter bag (a) is a solid portion 21, while the half of the longitudinal rib 2 far from the filter bag (b) is a hollow portion 22. This ensures the strength of the longitudinal rib 2 while allowing the two parts to perform different functions. The solid portion 21 near the filter bag (a) contacts the inner surface of the filter bag, serving as the cage 10's framework to maintain the bag's shape. The hollow portion 22 far from the filter bag (b) is filled with a catalyst, which participates in the secondary removal of dioxins.

[0029] In this embodiment, the catalyst may be a Mn-based catalyst. Multiple micron-sized pores 221 may be distributed on the surface of the longitudinal ribs 2 of the hollow structural portion 22. Powdered Mn-based catalyst may fill or adhere to the micron-sized pores 221 of the hollow structural portion 22. The powdered form of the Mn-based catalyst further enhances its dioxin degradation efficiency. To prevent leakage of the Mn-based catalyst powder from the longitudinal ribs 2, the micron-sized pores 221 are distributed on the surface of the longitudinal ribs 2 of the hollow structural portion 22.

[0030] In this embodiment, half of the volume of the longitudinal reinforcement 2 along the length direction can be formed into a solid structural portion 21, and the other half of the volume of the longitudinal reinforcement 2 can be formed into a hollow structural portion 22 by connecting a long tube sheet to the outside of the solid structural portion, and a plurality of small holes (micrometer-level small holes) are distributed on the long tube sheet.

[0031] In this embodiment, the transverse catalytic mesh 3 is formed with transverse ribs 31 at its outer periphery and a metal mesh 32 at its central portion. While the periphery of the transverse catalytic mesh 3 may be identical to conventional transverse ribs 31, a mesh structure is further provided within the inner surface of the conventional transverse ribs 31. The transverse ribs 31 can be connected to the inner side (solid portion) of each longitudinal rib 2. The area of the transverse catalytic mesh 3 is smaller than the cross-sectional area of the cage formed by the longitudinal ribs 2, the mounting plate 1, and the support base 4. The number and arrangement density of the transverse catalytic meshes 3 can be increased or decreased depending on actual usage. The Mn-based catalyst can be attached to the transverse catalytic mesh 3 by impregnating it with the Mn-based catalyst, so that the entire transverse catalytic mesh 3 is coated with the Mn-based catalyst, achieving a secondary dioxin removal effect.

[0032] In this embodiment, the longitudinal ribs 2 are arranged circumferentially and, together with the mounting plate 1 and support base 4, form a cylindrical cage. The transverse catalytic screen 3 is also circular. Because the actual application scenarios of different bag cages 10 vary, the structure of the bag cage 10 of the present invention can be configured according to actual circumstances. For example, the shape and size of the mounting plate 1 and support base 4, as well as the number and arrangement of the longitudinal ribs 2, can all be flexibly adjusted according to the actual application scenario.

[0033] In this embodiment, a centrally protruding portion of the mounting plate 1 is provided with a centrally extending conduit. The mounting plate 1 comprises an outer ring 11 at its upper end and an inner ring 12 (i.e., the conduit) positioned within the base of the outer ring 11. The outer ring 11 is tightly connected to the flower plate, and the top ends of the longitudinal ribs 2 are connected to the inner ring 12. The inner ring 12 mates with the expansion ring of the filter bag, securing the filter bag beneath the flower plate. The support base 4, connected to the longitudinal ribs 2, maintains the stability of the cage 10 framework.

[0034] The bag cage 10 of the above embodiment can be supported on a filter bag which is also attached with a catalyst for converting dioxins into harmless substances during specific implementation. When treating the flue gas generated by garbage incineration, the following different levels of effects can be produced over time.

[0035] After the dioxins in the flue gas are removed once by the catalyst on the surface of the filter bag, they can be removed a second time by the longitudinal ribs 2 and the transverse catalytic mesh 3 of the bag cage 10, thereby improving the dioxin removal efficiency.

[0036] As the flue gas filtration process progresses, high-temperature flue gas can easily cause the filter bag to shrink and age, impairing its primary dioxin removal effectiveness. However, the bag cage 10 offers the opposite effect. Because the longitudinal ribs 2 and transverse catalytic meshes 3 of the bag cage 10 are made of metal, offering excellent thermal conductivity, the temperature of the longitudinal ribs 2 and transverse catalytic meshes 3 rises after the high-temperature flue gas passes through them. This increases the reactivity of the catalyst attached to these ribs and meshes, boosts the rate of dioxin molecules, and increases the number of collisions between the catalyst and dioxin molecules, accelerating the dioxin degradation process during secondary removal. Therefore, the bag cage 10 of the present invention eliminates the need for expensive and complex modified low-temperature catalysts, reducing the cost of dioxin removal.

[0037] Through the above structure, the utility model improves the structure of the horizontal and vertical ribs of the bag cage, transforming it into a horizontal catalytic mesh and double-structured longitudinal ribs. Relying on the support mesh impregnated with the catalyst and the double-structured longitudinal ribs filled with powdered catalyst, it can not only solve the problem of incomplete dioxin removal mentioned above, but also reduce the cost of catalyst modification, improve the dioxin removal efficiency and the utilization rate of conventional catalysts.

[0038] The above is only an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bag cage supported in a filter bag, characterized in that: include: Mounting plate, several longitudinal ribs, several transverse catalytic screens, and a supporting base; The mounting plate and the support base are located at the top and bottom of the bag cage respectively. The upper and lower ends of the longitudinal ribs are connected to the mounting plate and the support base respectively. Several longitudinal ribs are arranged at intervals and surround the mounting plate and the support base to form a cage body. The longitudinal ribs are made of metal. The half of the longitudinal rib near the filter bag is a solid structure, and the half of the longitudinal rib far from the filter bag is a hollow structure. The surface of the longitudinal rib in the hollow structure is distributed with multiple small holes. The hollow structure is filled with a catalyst used to convert dioxins into harmless substances. The transverse catalytic mesh is made of metal and its outer periphery is connected to the inner side of the longitudinal ribs. The transverse catalytic mesh is connected to the inner sides of several longitudinal ribs and is spaced and parallel in the vertical direction of the longitudinal ribs. A catalyst for converting dioxins into harmless substances is attached to the transverse catalytic mesh.

2. A bag cage according to claim 1, characterized in that: The catalyst is a Mn-based catalyst.

3. The bag cage according to claim 2, characterized in that: A plurality of micron-sized pores are distributed on the surface of the longitudinal ribs of the hollow structure portion, and the powdered Mn-based catalyst is filled in or attached to the micron-sized pores of the hollow structure portion.

4. A bag cage according to any one of claims 1 to 3, characterized in that: Half of the volume of the longitudinal reinforcement along the length direction forms a solid structural part of the entity, and the other half of the volume of the longitudinal reinforcement forms a hollow structural part through a long tube segment connected to the outside of the solid structural part, and a plurality of small holes are distributed on the long tube segment.

5. The bag cage according to claim 1, characterized in that: The outer periphery of the transverse catalytic mesh forms transverse ribs, the middle portion forms a metal mesh, and the transverse ribs are connected to the inner sides of the longitudinal ribs.

6. The bag cage according to claim 1, characterized in that: A plurality of longitudinal ribs are arranged in a circle and form a cylindrical cage together with the mounting plate and the supporting base. The transverse catalytic net is circular.

7. The bag cage according to claim 1, characterized in that: A pipe with a central passage is protruding downward from the middle of the mounting plate. The mounting plate includes an outer ring at the upper end and an inner ring arranged on the inner side of the bottom of the outer ring. The outer ring is tightly connected to the flower plate, and the top end of the longitudinal rib is connected to the inner ring.

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