Horizontal exhaust gas absorption treatment equipment

Abstract

The application relates to a horizontal tail gas absorption treatment equipment, which comprises at least two-stage circulating absorption zones arranged in a horizontal direction; a channel for accommodating gas passing is arranged between adjacent circulating absorption zones, and a flow guide member for enabling gas to flow from an upper-stage circulating absorption zone to a lower-stage circulating absorption zone is arranged in the upper-stage circulating absorption zone; each circulating absorption zone is respectively provided with a liquid circulating pipeline, a tail gas absorption assembly and a liquid storage zone; one end of the circulating pipeline is communicated with the liquid storage zone, the other end is communicated with the tail gas absorption assembly, and the circulating pipeline is used for driving absorption liquid to flow from the liquid storage zone to the tail gas absorption assembly; and the tail gas absorption assembly is located above the liquid storage zone. The application reduces the height of the treatment equipment, reduces the maintenance difficulty and installation difficulty, and avoids the liquid leakage problem among the absorption zones.

Description

Technical Field

[0001] This application relates to the field of exhaust gas treatment technology, and in particular to a horizontal exhaust gas absorption and treatment device. Background Technology

[0002] Currently, exhaust gas treatment equipment is typically a vertically arranged tower structure. Its height is considerable, occupying a large vertical space, making it unsuitable for construction environments with low ceilings. Furthermore, the height of the tower structure makes maintenance difficult. The stacked absorption zones in the tower structure are prone to leakage between different levels.

[0003] Therefore, there is a need to provide a new type of exhaust gas absorption and treatment equipment that reduces its height and solves the leakage problem. Utility Model Content

[0004] Therefore, it is necessary to provide a horizontal exhaust gas absorption and treatment device, the specific technical solution of which is as follows.

[0005] A horizontal exhaust gas absorption and treatment device includes: at least two stages of circulating absorption zones arranged in a horizontal direction; a channel for accommodating gas passage is provided between adjacent circulating absorption zones, and a guide element is provided in the upper circulating absorption zone to allow gas to flow to the lower circulating absorption zone; Each circulating absorption zone is equipped with a liquid circulation pipeline, an exhaust gas absorption component, and a liquid storage area; one end of the circulation pipeline is connected to the liquid storage area, and the other end is connected to the exhaust gas absorption component, which is used to drive the absorbent liquid from the liquid storage area to the exhaust gas absorption component; the exhaust gas absorption component is located above the liquid storage area.

[0006] Furthermore, adjacent circulating absorption zones are separated by partition walls, and the channels are disposed on the partition walls.

[0007] Furthermore, it includes a primary circulating absorption zone, a secondary circulating absorption zone, and a tertiary circulating absorption zone arranged horizontally; the primary circulating absorption zone is connected to the secondary circulating absorption zone through a first channel; the secondary circulating absorption zone is connected to the tertiary circulating absorption zone through a second channel.

[0008] Furthermore, the primary circulation absorption zone is provided with an air inlet; the tertiary circulation absorption zone is provided with an air outlet; so that the exhaust gas flows from the air inlet to the air outlet and passes through the exhaust gas absorption components of each circulation absorption zone in sequence.

[0009] Furthermore, the primary circulation absorption zone is equipped with a primary exhaust gas absorption assembly, which includes a spray head and a primary wire mesh demister located above the spray head. The secondary circulation absorption zone is equipped with a secondary exhaust gas absorption assembly, which includes a first packing layer and a first liquid distributor located above the first packing layer. The three-stage circulating absorption zone is equipped with a three-stage exhaust gas absorption assembly, which includes a second packing layer, a second liquid distributor located above the second packing layer, and a second-stage wire mesh demister located above the second liquid distributor.

[0010] Furthermore, the primary circulation absorption zone includes a primary storage zone, the secondary circulation absorption zone includes a secondary storage zone, and the tertiary circulation absorption zone includes a tertiary storage zone; the concentration of the absorbent in the primary storage zone is greater than the concentration of the absorbent in the secondary storage zone, and the concentration of the absorbent in the secondary storage zone is greater than the concentration of the absorbent in the tertiary storage zone.

[0011] Furthermore, the first channel extends from the top of the primary circulating absorption zone to the top of the secondary circulating absorption zone; the second channel extends from the bottom of the secondary circulating absorption zone to the bottom of the tertiary circulating absorption zone.

[0012] Furthermore, the first channel extends from the top of the primary circulating absorption region to the bottom of the secondary circulating absorption region; the second channel extends from the top of the secondary circulating absorption region to the bottom of the tertiary circulating absorption region.

[0013] Furthermore, an overflow pipe is provided between the liquid storage areas of adjacent circulating absorption zones.

[0014] Furthermore, the flow guide includes a plurality of spaced-apart flow guide plates, with flow guide gaps formed between adjacent flow guide plates.

[0015] Beneficial effects: The horizontal exhaust gas absorption and treatment equipment provided by this utility model arranges the absorption zones at each level in a horizontal direction, reducing the height of the treatment equipment and decreasing the difficulty of maintenance and installation; it allows the gas to flow from the upper absorption zone to the lower absorption zone, and makes each absorption zone form an independent circulation system. The absorbent liquid falls into the storage area of ​​each circulation absorption zone after passing through the exhaust gas treatment components, avoiding leakage between absorption zones; it also reduces the most complex component, the gas-liquid separator, between each circulation layer of the tower-type exhaust gas treatment equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the processing device in Example 1; Figure 2 This is a schematic diagram of the flow guide component; Figure 3 This is a schematic diagram of the processing device in Example 2.

[0018] Explanation of reference numerals in the attached diagram: 1. Primary circulation absorption zone; 2. Secondary circulation absorption zone; 3. Tertiary circulation absorption zone; 4. Flow guide; 5. Liquid circulation pipeline; 6. First channel; 7. Second channel; 8. Overflow pipe; 9. Mesh plate; 11. Spray head; 12. Primary wire mesh demister; 13. Primary liquid storage area; 14. Air inlet; 21. First packing layer; 22. First liquid distributor; 23. Secondary liquid storage area; 31. Second packing layer; 32. Second liquid distributor; 33. Secondary wire mesh demister; 34. Tertiary liquid storage area; 35. Air outlet; 41. Flow deflector; 42. Flow deflector gap. Detailed Implementation

[0019] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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 communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Example 1 Reference Figure 1 As shown, this embodiment provides a horizontal exhaust gas absorption and treatment device, including three-stage circulating absorption zones 3 arranged horizontally. In this embodiment, only one circulating absorption zone is provided; in other embodiments, two or more stages of circulating absorption zones may be provided. Channels are provided between adjacent circulating absorption zones to accommodate other gases, and a guide element 4 is provided in the upper-level circulating absorption zone 1 to guide the gas flow to the lower-level circulating absorption zone 1.

[0026] Specifically, this embodiment includes a primary circulation absorption zone 1, a secondary circulation absorption zone 2, and a tertiary circulation absorption zone 3 in sequence. The gas flows from the primary circulation absorption zone 1 to the secondary circulation absorption zone 2, and then to the tertiary circulation absorption zone 3. In this embodiment, the primary circulation absorption zone 1 is provided with an air inlet 14, and the tertiary circulation absorption zone 3 is provided with an air outlet 35. The air inlet 14 is connected to a treatment device that generates exhaust gas, such as an oven, and the exhaust gas is driven to flow by pressure provided by the treatment device, thereby flowing from the air inlet 14 to the air outlet 35.

[0027] Specifically, each circulating absorption zone is equipped with a liquid circulation pipeline 5, an exhaust gas absorption component, and a liquid storage area. One end of the circulation pipeline is connected to the liquid storage area, and the other end is connected to the exhaust gas absorption component, used to drive the absorbent liquid from the liquid storage area to the exhaust gas absorption component. The exhaust gas absorption component is located above the liquid storage area. A corresponding circulation pump is installed on the liquid circulation pipeline 5 to drive the flow of the absorbent liquid.

[0028] The horizontal exhaust gas absorption and treatment equipment provided in this embodiment arranges the absorption zones in a horizontal direction, reducing the height of the treatment equipment and simplifying maintenance and installation. It allows gas to flow from one absorption zone to the next, forming an independent circulation system for each absorption zone. The absorbent liquid, after passing through the exhaust gas treatment components, falls into the storage area of ​​each circulating absorption zone, avoiding leakage between absorption zones. It also reduces the most complex component of the tower-type exhaust gas treatment equipment—the gas-liquid separator between each circulation layer.

[0029] It should be noted that in tower-type processing equipment, a gas-liquid separator is required to prevent the liquid from the upper layer from falling; however, the horizontal tail gas absorption and treatment equipment provided in this embodiment eliminates the risk of liquid leakage from the upper layer to the lower layer between each level of circulation treatment zone, reducing the need for a gas-liquid separator and lowering the complexity and cost of the overall structure.

[0030] Specifically, adjacent circulating absorption zones are separated by partition walls, and the channels are disposed on the partition walls. The primary circulating absorption zone 1 and the secondary circulating absorption zone 2 are connected by a first channel 6, and the secondary circulating absorption zone 2 is connected to the tertiary circulating absorption zone 3 through a second channel 7. In this embodiment, two partition walls are provided between adjacent absorption zones, each with an opening, allowing the first channel 6 to extend from the top of the primary circulating absorption zone 1 to the bottom of the secondary circulating absorption zone 2; the second channel 7 extends from the top of the secondary circulating absorption zone 2 to the bottom of the tertiary circulating absorption zone 3. In the secondary circulating absorption zone 2 and the tertiary circulating absorption zone 3, the gas always flows from bottom to top. Because the liquid flows from top to bottom under gravity, the concentration of the absorbent liquid in the lower part of the exhaust gas absorption assembly is higher than that in the upper part, resulting in higher absorption efficiency of the exhaust gas under this flow direction. It should be noted that the absorbent liquid concentration here refers to the concentration after absorbing harmful substances in the exhaust gas. For example, if the main substance in the exhaust gas is NMP, then the absorbent liquid concentration refers to the NMP concentration. The lower the absorbent liquid concentration, the higher the absorption efficiency of the exhaust gas.

[0031] Specifically, an overflow pipe 8 is provided between the storage areas of adjacent circulating absorption zones. The overflow pipe 8 allows the storage area of ​​the next-level circulating absorption zone 1 to replenish the storage area of ​​the previous-level circulating absorption zone 1. In this embodiment, the primary storage area 13 of the primary circulating absorption zone 1 contains concentrated liquid, the secondary storage area 23 of the secondary circulating absorption zone 2 contains diluted liquid, and pure water is directly added to the tertiary storage area 34 of the tertiary circulating absorption zone 3. When replenishment is needed, pure water is directly added to and from the tertiary storage area 34. Under the action of the overflow pipe 8, the liquid in each storage area will replenish the liquid in the next-level storage area 13. The replenishment process is simple and convenient.

[0032] Specifically, the primary circulation absorption zone 1 is equipped with a primary exhaust gas absorption assembly, which includes a spray head 11 and a primary wire mesh demister 12 located above the spray head 11. The secondary circulation absorption zone 2 is provided with a secondary exhaust gas absorption assembly, which includes a first packing layer 21 and a first liquid distributor 22 located above the first packing layer 21. The three-stage circulating absorption zone 3 is equipped with a three-stage exhaust gas absorption assembly, which includes a second packing layer 31, a second liquid distributor 32 located above the second packing layer 31, and a second-stage wire mesh demister 33 located above the second liquid distributor 32.

[0033] Specifically, the primary circulation absorption zone 1 includes a primary storage zone 13, the secondary circulation absorption zone 2 includes a secondary storage zone 23, and the tertiary circulation absorption zone 3 includes a tertiary storage zone 34; the concentration of the absorbent in the primary storage zone 13 is greater than the concentration of the absorbent in the secondary storage zone 23, and the concentration of the absorbent in the secondary storage zone 23 is greater than the concentration of the absorbent in the tertiary storage zone 34.

[0034] Specifically, refer to Figure 2 As shown, the flow guide 4 includes a plurality of spaced-apart flow guide plates 41, with flow guide gaps 42 formed between adjacent flow guide plates 41. The flow guide plates 41 can change the flow direction of the gas, preventing other gases from directly impacting the inner wall of the circulation absorption zone.

[0035] Specifically, each of the circulation absorption zones is provided with a perforated plate 9, which is located between the exhaust gas absorption component and the liquid storage zone.

[0036] Work process: In the primary circulation absorption zone 1: the exhaust gas enters the primary circulation absorption zone 1 through the air inlet 14, flows upward after passing through the guide 4, passes through the mesh plate 9 and the spray area in sequence, then passes through the primary wire mesh demister 12, and finally enters the first channel 6 after passing through the guide 4; the absorbent liquid is circulated to the spray head 11 and sprayed into the spray area, so that the harmful substances in the exhaust gas are fully contacted with the absorbent liquid and absorbed. The absorbent liquid flows into the primary storage zone 13. Because the exhaust gas concentration is high in the primary circulation absorption zone 1, the absorbent liquid recovered in the storage zone is also of high concentration.

[0037] In the secondary circulation absorption zone 2: the exhaust gas enters the guide plate 41 through the first channel 6 and changes direction, passing through the mesh plate 9 and the first packing layer 21 in sequence, and then flows into the second channel 7 through the guide plate 41; the absorbent is circulated to the first liquid distributor 22 and falls into the first packing layer 21. As the absorbent flows evenly downward along the packing gaps, it comes into full contact with the exhaust gas that is moving upward through the packing gaps, so that the harmful substances in the exhaust gas are further absorbed. The absorbent falls into the secondary storage zone 23 to form a dilute solution with a relatively low concentration.

[0038] In the three-stage absorption zone: the exhaust gas enters the guide plate 41 through the second channel 7 and changes direction, passing through the mesh plate 9, the second packing layer 31, and the second-stage wire mesh demister 33 in sequence before being discharged out through the air outlet 35; the absorbent liquid is circulated to the second liquid distributor 32 and falls into the second packing layer 31. As the absorbent liquid flows evenly downward along the packing gaps, it comes into full contact with the exhaust gas that is moving upward through the packing gaps, so that the harmful substances in the exhaust gas are further absorbed; the absorbent liquid injected into the three-stage storage zone 34 is pure water, which continues to flow back to the three-stage storage zone 34 after passing through the second packing layer 31.

[0039] When replenishment is needed, pure water can be added to the inside and outside of the three-stage liquid storage area 34, and the liquid can be replenished to each liquid storage area through the overflow pipe 8.

[0040] Example 2 This embodiment provides a horizontal exhaust gas absorption and treatment device, referring to... Figure 3 As shown, the difference between this embodiment and embodiment 1 is that only one partition wall is provided between adjacent circulating absorption zones, and the partition wall has an opening to form a channel.

[0041] Specifically, the first channel 6 extends from the top of the primary circulation absorption zone 1 to the top of the secondary circulation absorption zone 2; the second channel 7 extends from the bottom of the secondary circulation absorption zone 2 to the bottom of the tertiary circulation absorption zone 3. In this embodiment, the flow direction of the gas in the secondary circulation absorption zone 2 is similar to that in Embodiment 1. The horizontal exhaust gas absorption and treatment device provided in this embodiment has a simpler structure compared to Embodiment 1.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A horizontal exhaust gas absorption and treatment device, characterized in that, include: It has at least two levels of circulating absorption zones arranged in a horizontal direction; there is a channel between adjacent circulating absorption zones to allow gas to pass through, and there is a guide in the upper level circulating absorption zone to allow gas to flow to the lower level circulating absorption zone; Each circulating absorption zone is equipped with a liquid circulation pipeline, an exhaust gas absorption component, and a liquid storage area; one end of the circulation pipeline is connected to the liquid storage area, and the other end is connected to the exhaust gas absorption component, which is used to drive the absorbent liquid from the liquid storage area to the exhaust gas absorption component; the exhaust gas absorption component is located above the liquid storage area.

2. The horizontal exhaust gas absorption and treatment device according to claim 1, characterized in that, Adjacent circulating absorption zones are separated by partition walls, and the channels are disposed on the partition walls.

3. The horizontal exhaust gas absorption and treatment device according to claim 1, characterized in that, It includes a primary circulating absorption zone, a secondary circulating absorption zone, and a tertiary circulating absorption zone arranged horizontally; the primary circulating absorption zone is connected to the secondary circulating absorption zone through a first channel; the secondary circulating absorption zone is connected to the tertiary circulating absorption zone through a second channel.

4. The horizontal exhaust gas absorption and treatment device according to claim 3, characterized in that, The primary circulation absorption zone is provided with an air inlet; the tertiary circulation absorption zone is provided with an air outlet; so that the exhaust gas flows from the air inlet to the air outlet and passes through the exhaust gas absorption components of each circulation absorption zone in sequence.

5. A horizontal exhaust gas absorption and treatment device according to claim 4, characterized in that, The primary circulation absorption zone is equipped with a primary exhaust gas absorption assembly, which includes a spray head and a primary wire mesh demister located above the spray head. The secondary circulation absorption zone is equipped with a secondary exhaust gas absorption assembly, which includes a first packing layer and a first liquid distributor located above the first packing layer. The three-stage circulating absorption zone is equipped with a three-stage exhaust gas absorption assembly, which includes a second packing layer, a second liquid distributor located above the second packing layer, and a second-stage wire mesh demister located above the second liquid distributor.

6. A horizontal exhaust gas absorption and treatment device according to claim 3, characterized in that, The primary circulation absorption zone includes a primary storage zone, the secondary circulation absorption zone includes a secondary storage zone, and the tertiary circulation absorption zone includes a tertiary storage zone; the concentration of the absorbent in the primary storage zone is greater than the concentration of the absorbent in the secondary storage zone, and the concentration of the absorbent in the secondary storage zone is greater than the concentration of the absorbent in the tertiary storage zone.

7. A horizontal exhaust gas absorption and treatment device according to claim 3, characterized in that, The first channel extends from the top of the primary circulating absorption region to the top of the secondary circulating absorption region; the second channel extends from the bottom of the secondary circulating absorption region to the bottom of the tertiary circulating absorption region.

8. A horizontal exhaust gas absorption and treatment device according to claim 3, characterized in that, The first channel extends from the top of the primary circulating absorption region to the bottom of the secondary circulating absorption region; the second channel extends from the top of the secondary circulating absorption region to the bottom of the tertiary circulating absorption region.

9. A horizontal exhaust gas absorption and treatment device according to claim 8, characterized in that, An overflow pipe is installed between the liquid storage areas of adjacent circulation absorption zones.

10. A horizontal exhaust gas absorption and treatment device according to claim 1, characterized in that, The flow guide includes multiple spaced flow guide plates, with flow guide gaps formed between adjacent flow guide plates.

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