A multi-layer combined filter structure of a desulfurization dust collector

Abstract

The utility model discloses a multilayer combined filter structure of desulfurization dust remover, including tower body, at least one layer composite filler layer is arranged in the tower body, the composite filler layer is multilayer structure, and the regular shaped filler area, transition flow guide area, bulk packing area and support grating from top to bottom include successively, the regular shaped filler area and bulk packing area outside all are provided with fixed frame, the regular shaped filler area and bulk packing area are filled in the corresponding fixed frame respectively, through the high specific surface area of bulk packing, can effectively strengthen gas liquid contact in bulk packing area, improve mass transfer rate, and the low resistance characteristic of regular shaped filler can avoid partial pressure drop surge in regular shaped filler area, realizes the balance of desulfurization efficiency and energy consumption, reduces operating energy consumption while guaranteeing desulfurization effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of spray-type desulfurization and dust removal towers, specifically relating to a multi-layer combined filter structure for a desulfurization and dust removal device. Background Technology

[0002] Spray-type desulfurization and dust removal towers, widely used in industrial flue gas purification, contain a packing layer. When exhaust gas passes through the packing layer, it comes into full contact with the sprayed liquid, undergoing a chemical reaction to remove pollutants. This structure increases the gas-liquid contact area and improves desulfurization efficiency. Currently, traditional spray towers often use a single type of packing (such as fully structured packing, fully loose packing, or single alternating packing) in a stacked arrangement. While the structure is simple, a single packing structure cannot simultaneously meet the requirements of high desulfurization efficiency and low operating pressure drop. For example, while loose packing (such as Pall rings) has a large specific surface area and a high initial desulfurization rate, its pores are easily clogged by dust, leading to a sharp increase in pressure drop and energy consumption. Structured packing (such as corrugated plates) has a low pressure drop and stable flow, but it has poor adaptability to high-concentration pollutants and is prone to insufficient mass transfer area. To address these issues, this invention proposes a multi-layer combined filtration structure for a desulfurization and dust removal device. This multi-layer combination improves the processing efficiency of a single packing layer, enhances purification capacity, and simultaneously reduces tower height and pressure drop. Utility Model Content

[0003] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer combined filter structure for a desulfurization and dust removal device, comprising a tower body, wherein at least one layer of composite packing is provided inside the tower body, the composite packing layer having a multi-layer structure, comprising, from top to bottom, a structured packing area, a transition guide area, a bulk packing area and a support grid plate, wherein fixed frames are provided on the outer sides of both the structured packing area and the bulk packing area, and the structured packing area and the bulk packing area are respectively filled in the corresponding fixed frames.

[0004] As a preferred embodiment of this utility model, the structured packing area and the bulk packing area are arranged in a vertically partitioned, layered manner.

[0005] As a preferred technical solution of this utility model, a pretreatment section is provided at the air inlet of the tower body, and a cyclone dust collector or an inertial collision plate is installed in the pretreatment section.

[0006] As a preferred embodiment of this utility model, the structured packing area is composed of corrugated plates, grids, or honeycomb packing.

[0007] As a preferred embodiment of this utility model, both the transition guide zone and the support grid are porous flow equalization grids.

[0008] As a preferred embodiment of this utility model, the bulk packing zone is composed of Pall rings, stepped rings, or Raschig rings.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] (1) By utilizing the high specific surface area of ​​the bulk packing, this utility model can effectively enhance gas-liquid contact and improve mass transfer rate in the bulk packing area. Meanwhile, the low resistance of the structured packing can avoid local pressure drop surges in the structured packing area, thus achieving a balance between desulfurization efficiency and energy consumption. This reduces operating energy consumption while ensuring desulfurization effect.

[0011] (2) Large dust particles are intercepted by the bulk packing area as a “pre-barrier” to prevent large dust particles from entering the narrow flow channel of the structured packing. The smooth surface of the structured packing reduces the risk of fine particles adhering. Through this graded interception and self-cleaning design, the operating cycle of the equipment is extended, the frequency of cleaning and maintenance due to blockage is reduced, and the stability and reliability of the equipment are improved.

[0012] (3) The multi-layer combined structure of this utility model can replace the traditional multi-layer single packing arrangement, reducing the space requirement of the tower body and making the equipment more compact. At the same time, the overall cost is reduced by more than 30% compared with the fully structured packing scheme. It has obvious advantages in renovation projects or space-constrained scenarios, which not only meets the purification requirements but also reduces costs and improves economic efficiency. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an exploded view of the composite filler layer in this utility model;

[0016] In the diagram: 1. Tower body; 2. Structured packing zone; 3. Transition guide zone; 4. Bulk packing zone; 5. Support grid plate; 6. Fixing frame; 7. Pretreatment section. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example

[0019] Please see Figure 1-2 The present invention provides the following technical solution: a multi-layer combined filter structure for a desulfurization and dust removal device, including a tower body 1, the tower body 1 having at least one layer of composite packing material inside, the composite packing material layer having a multi-layer structure, including, from top to bottom, a structured packing area 2, a transition guide area 3, a bulk packing area 4 and a support grid plate 5, a fixed frame 6 being provided on the outside of both the structured packing area 2 and the bulk packing area 4, and the structured packing area 2 and the bulk packing area 4 being filled in the corresponding fixed frame 6 respectively.

[0020] In order to make the gas-liquid contact more complete, while taking into account mass transfer efficiency and flow stability, and avoiding the limitations of a single packing structure, in this embodiment, as a preferred technical solution of the present invention, the structured packing zone 2 and the bulk packing zone 4 are arranged in a vertically partitioned and stacked manner.

[0021] In order to perform preliminary treatment on the industrial flue gas entering the tower body 1, remove large dust particles, reduce the processing burden of the subsequent composite packing layer, and improve the overall purification effect, in this embodiment, as a preferred technical solution of the present invention, a pretreatment section 7 is provided at the air inlet of the tower body 1, and a cyclone dust collector or an inertial collision plate is installed in the pretreatment section 7.

[0022] In order to utilize the ordered structure and specific shape of the structured packing to achieve low resistance drop, stable flow, and efficient gas-liquid mass transfer, in this embodiment, as a preferred technical solution of the present invention, the structured packing zone 2 is composed of corrugated plates, grids, or honeycomb packing.

[0023] In order to achieve uniform transition and stable flow of flue gas between different packing zones, ensure uniform airflow distribution of the entire filtration structure, and improve purification efficiency, in this embodiment, as a preferred technical solution of the present invention, both the transition guide zone 3 and the support grid plate 5 are porous flow equalization grids.

[0024] In order to enhance the gas-liquid contact effect and improve the capture ability of small droplets and dust by utilizing the high specific surface area and good porosity of the bulk packing, thereby achieving efficient primary desulfurization and dust interception, in this embodiment, as a preferred technical solution of the present invention, the bulk packing zone 4 is composed of Pall rings, stepped rings, or Raschig rings.

[0025] In summary, with the help of the above-mentioned technical solution of this utility model, when industrial flue gas enters the tower body 1, it first passes through the pretreatment section 7 at the air inlet. In the pretreatment section 7, if a cyclone dust collector is installed, the centrifugal force of the cyclone dust collector is used to separate larger particulate pollutants in the flue gas; if an inertial collision plate is installed, the principle of inertial collision is used to make larger particulate pollutants collide with the inertial collision plate and be intercepted, thus completing the preliminary pretreatment of the flue gas.

[0026] The pretreated flue gas then enters the composite packing layer. The composite packing layer consists of multiple layers, from top to bottom: a structured packing zone 2, a transition guide zone 3, a bulk packing zone 4, and a support grid 5. In the bulk packing zone 4, it is composed of bulk packing materials such as Pall rings, stepped rings, or Raschig rings. These bulk packing materials have high specific surface area and porosity. When the flue gas passes through, small droplets and dust particles in the flue gas come into full contact with the bulk packing materials. The characteristics of the bulk packing materials enhance gas-liquid contact, completing primary desulfurization and intercepting large dust particles in the flue gas, preventing them from entering the structured packing zone 2.

[0027] Subsequently, the flue gas passes through the transition guide zone 3, which is a porous flow equalization grid. Its function is to guide the flue gas, ensuring it enters the structured packing zone 2 evenly. The structured packing zone 2 is composed of corrugated plates, grids, or honeycomb packing. The structured packing maintains low resistance characteristics through its ordered flow channels, avoiding sudden increases in local pressure drop. Simultaneously, its smooth surface reduces the risk of fine particle adhesion, achieving deep purification of the flue gas and stabilizing the flow field. The supporting grid 5 is a porous flow equalization grid, serving to support the upper packing and ensure uniform airflow distribution. Through this multi-layered combination, highly efficient removal of pollutants from the flue gas is achieved.

[0028] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer combined filter structure for a desulfurization and dust removal device, comprising a tower body (1), characterized in that: The tower body (1) is provided with at least one layer of composite packing. The composite packing is a multi-layer structure, which includes, from top to bottom, a structured packing area (2), a transition flow guiding area (3), a bulk packing area (4), and a support grid plate (5). The structured packing area (2) and the bulk packing area (4) are both provided with fixed frames (6) on their outer sides. The structured packing area (2) and the bulk packing area (4) are respectively filled in the corresponding fixed frames (6).

2. The multi-layer combined filter structure of a desulfurization and dust removal device according to claim 1, characterized in that: The structured packing zone (2) and the bulk packing zone (4) are arranged in a vertically layered manner.

3. The multi-layer combined filter structure of a desulfurization and dust removal device according to claim 1, characterized in that: The tower body (1) is provided with a pretreatment section (7) at the air inlet, and a cyclone dust collector or an inertial collision plate is installed in the pretreatment section (7).

4. The multi-layer combined filter structure of a desulfurization and dust removal device according to claim 1, characterized in that: The structured packing zone (2) is composed of corrugated plates, grids, or honeycomb packing.

5. The multi-layer combined filter structure of a desulfurization and dust removal device according to claim 1, characterized in that: Both the transition guide zone (3) and the support grid (5) are porous flow equalization grids.

6. The multi-layer combined filter structure of a desulfurization and dust removal device according to claim 1, characterized in that: The bulk packing zone (4) is composed of Pall rings, step rings, or Raschig rings.

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