High tower tail gas white elimination device
By introducing a filtration and heat exchange structure into the high tower exhaust gas treatment device, and using natural wind to exchange heat with NMP exhaust gas, the problems of energy consumption and maintenance costs in high tower spraying technology are solved, and energy-consuming white mist removal and efficient waste gas treatment are achieved.
Patent Information
- Application Number
- CN202422096247.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-27
AI Technical Summary
When handling NMP exhaust gas, existing tower spraying technology requires energy to heat and heat up to avoid the generation of white mist, and requires personnel maintenance, resulting in increased production costs.
A filter structure and a heat exchange structure are set up in the high tower structure, and natural wind and NMP waste gas are used to exchange heat, so that the exhaust gas temperature is similar to the ambient temperature, avoid the generation of white mist, and increase the contact time and area between waste gas and natural wind through the flow guide assembly to achieve efficient heat exchange.
No additional energy consumption and manual maintenance are required, which effectively avoids the generation of white mist, reduces production costs, and improves heat exchange efficiency.
Smart Images
Figure CN223243398U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of tail gas treatment equipment, and in particular to a high-tower tail gas whitening device. Background Art
[0002] Coating machines release large amounts of NMP-containing waste gas during operation, which must be treated to meet established environmental standards before being discharged. Currently, the industry generally uses high-tower spraying technology to treat these hazardous waste gases: the NMP waste gas is first condensed to recover the NMP, then directed to a high-tower for spraying before discharge. However, because the condensation process requires a relatively low temperature for efficient NMP recovery, the temperature difference between the NMP waste gas after spraying and the ambient temperature is significant, resulting in a large amount of "white mist" when the NMP waste gas comes into contact with the air at the discharge port.
[0003] To avoid the generation of "white mist", the temperature of the NMP exhaust gas needs to be raised to a level close to that of the environment. Conventional high-rise towers are equipped with independent heating devices to heat the NMP exhaust gas. However, these heating devices require a certain amount of energy to operate continuously and require personnel to maintain them. Long-term operation will lead to increased production costs. Utility Model Content
[0004] In order to improve the problem of energy consumption and increased costs caused by maintenance of high towers in related technologies, the utility model provides a high tower tail gas whitening device.
[0005] A high-tower exhaust gas whitening device includes a high-tower structure, and also includes a filtering structure and a heat exchange structure arranged on the high-tower structure; the heat exchange structure includes an air-to-air heat exchanger, and the air-to-air heat exchanger includes a ventilation seat body and a guide assembly arranged in the high-tower structure, the ventilation seat body includes a bottom fixed plate, an upper fixed plate and a side edge arranged between the bottom fixed plate and the upper fixed plate, the bottom fixed plate and the upper fixed plate are provided with a plurality of air holes, the side edge is provided with a plurality of ventilation holes, and the guide assembly includes a plurality of guide parts arranged on the ventilation seat body.
[0006] Furthermore, the bottom fixing plate, the upper fixing plate and the side edges surround and form a cavity, and a plurality of the guide members are arranged in the cavity; and a plurality of the guide members are arranged along the edge direction of the ventilation seat.
[0007] Furthermore, the plurality of flow guide members are parallel to each other, and the plurality of flow guide members are evenly arranged along the edge direction of the ventilation seat body.
[0008] Furthermore, the guide member includes a lower straight portion connected to the bottom fixed plate and an upper straight portion connected to the upper fixed plate, and a bent guide portion is provided between the lower straight portion and the upper straight portion.
[0009] Furthermore, the bent guide portion includes a plurality of interconnected bent portions.
[0010] Furthermore, the high tower structure includes a high tower body, which has an air inlet and a tail outlet; the filtering structure and the heat exchange structure are located between the air inlet and the tail outlet, and the filtering structure is located below the heat exchange structure.
[0011] Furthermore, the filtering structure includes a high tower filler and a wire mesh demister arranged on the high tower body, and the high tower filler and the wire mesh demister are arranged along the height direction of the high tower body.
[0012] The utility model has the following advantages:
[0013] 1. The utility model is a high-tower exhaust gas whitening device, which is equipped with a filtering structure and a heat exchange structure in the high tower structure. The heat exchange structure includes a ventilation seat and a guide assembly. When the NMP exhaust gas enters the high tower structure, the NMP exhaust gas passes through the filtering structure and the heat exchange structure. The NMP exhaust gas enters from the bottom fixed plate of the heat exchange structure and passes through the guide member. In the process of passing through the guide member, the NMP exhaust gas will exchange heat with the ambient natural wind entering from the side edge, so that the temperature of the NMP exhaust gas is automatically adjusted to be similar to the ambient temperature. The discharge of the NMP exhaust gas after heat exchange can avoid the generation of white mist. The heat exchange structure operates by heat exchange with natural wind, does not require any energy consumption and does not require personnel maintenance.
[0014] 2. The utility model is a high-tower exhaust gas whitening device, and the guide assembly includes a plurality of guide members arranged along the edge of the ventilation seat body. The guide member includes a lower straight portion, an upper straight portion, and a bent guide portion arranged between the lower straight portion and the upper straight portion. The bent guide portion can effectively extend the passage time of NMP exhaust gas in the ventilation seat body, thereby increasing the contact time and contact area with natural wind to ensure higher heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0016] Figure 1This is a structural diagram of a high-tower tail gas whitening device according to an embodiment of the present application;
[0017] Figure 2 This is a side view of the heat exchange structure in the embodiment of the present application;
[0018] Figure 3 This is a structural diagram of the heat exchange structure in an embodiment of the present application.
[0019] Description of reference numerals:
[0020] 1. Tower structure; 11. Tower body; 111. Air inlet; 112. Tail exhaust port; 12. Tail exhaust air inlet pipe; 13. Tower rain cap; 2. Filter structure; 21. Tower filler; 22. Wire mesh demister; 3. Heat exchange structure; 31. Air-to-air heat exchanger; 311. Ventilation seat; 3111. Bottom fixing plate; 3112. Upper fixing plate; 3113. Side edge; 312. Guide assembly; 3121. Guide piece; 31211. Lower straight portion; 31212. Upper straight portion; 31213. Bent guide portion. DETAILED DESCRIPTION
[0021] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate 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 implementation methods.
[0024] Reference Figure 1 A high-tower tail gas whitening device includes a high tower structure 1, a filter structure 2, and a heat exchange structure 3 disposed on the high tower structure 1. When the whitening device is in operation, NMP waste gas enters the whitening device and then passes through the filter structure 2 and the heat exchange structure 3. The filter structure 2 filters the NMP waste gas, and the heat exchange structure 3 uses natural wind to exchange heat with the NMP waste gas, raising the temperature of the NMP waste gas to a temperature similar to that of the ambient temperature. Finally, the NMP waste gas is discharged, thereby preventing the generation of white mist.
[0025] Specifically, the tower structure 1 includes a tower body 11, which is vertically arranged. The tower body 11 has an air inlet 111 and a tail outlet 112. The air inlet 111 is located below the tower body 11. The air inlet 111 is connected to a tail outlet air inlet pipe 12. The NMP waste gas will enter the tower structure 1 through the tail outlet air inlet pipe 12. A spray structure (not shown in the figure) is provided in the tower structure 1. The spray structure sprays the NMP waste gas. It should be noted that the spray structure can be opened or closed according to actual needs. There is a waste liquid storage part below the air inlet 111, and the waste liquid generated by the spraying will be stored in the waste liquid storage part. The tail outlet 112 is located above the tower body 11. The NMP waste gas will be discharged through the tail outlet 112 after spraying, filtering and heat exchange. The tower body 11 is also provided with a tower rain cap 13 located above the tail outlet 112.
[0026] The filtration structure 2 and heat exchange structure 3 are located between the air inlet 111 and the exhaust port 112, with the filtration structure 2 located below the heat exchange structure 3. In this embodiment, the filtration structure 2 includes a tower packing 21 and a wire mesh demister 22 disposed within the tower body 11. The tower packing 21 and the wire mesh demister 22 are arranged along the height of the tower body 11. The NMP waste gas passes through the tower packing 21 and the wire mesh demister 22 in sequence, removing droplets from the NMP waste gas and reducing impurities in the NMP waste gas.
[0027] Reference Figure 1 、 Figure 2 as well as Figure 3After passing through the filter structure 2, the NMP waste gas enters the heat exchange structure 3. The heat exchange structure 3 includes an air-to-air heat exchanger 31, which includes a ventilation seat 311 and a flow guide assembly 312 disposed within the high tower structure 1. The ventilation seat 311 includes a bottom fixed plate 3111, an upper fixed plate 3112, and a side edge 3113 disposed between the bottom fixed plate 3111 and the upper fixed plate 3112. The bottom fixed plate 3111, the upper fixed plate 3112, and the side edge 3113 surround and form a cavity, and the flow guide assembly 312 is disposed in this cavity. Specifically, the bottom fixed plate 3111 and the upper fixed plate 3112 are disposed along the height direction of the high tower body 11. The area of the bottom fixed plate 3111 and the upper fixed plate 3112 is larger than the cross-sectional area of the high tower body 11 to achieve coverage. The bottom fixing plate 3111 and the upper fixing plate 3112 can be fixedly mounted on the tower body 11 or threadedly mounted on the tower body 11. The bottom fixing plate 3111 and the upper fixing plate 3112 are provided with a plurality of air holes evenly distributed thereon. The NMP exhaust gas flows upward from the bottom of the ventilation base 311 through these air holes.
[0028] The side edge 3113, which is wrapped between the bottom fixed plate 3111 and the upper fixed plate 3112, is provided with a number of ventilation holes (not shown) evenly distributed along the side edge 3113. These holes allow natural wind from outside the tower body 11 to enter the ventilation seat 311, exchanging heat with the NMP exhaust gas in the flow guide assembly 312. The flow guide assembly 312 includes a number of flow guides 3121 disposed within the ventilation seat 311. These flow guides 3121 are evenly distributed along the edge of the ventilation seat 311 and are parallel to each other.
[0029] In this embodiment, in order to ensure the contact time and contact area between the NMP exhaust gas and the natural wind to obtain better heat exchange efficiency, the guide member 3121 includes a lower straight portion 31211 connected to the bottom fixed plate 3111 and an upper straight portion 31212 connected to the upper fixed plate 3112, and a bent guide portion 31213 is provided between the lower straight portion 31211 and the upper straight portion 31212. The lower straight portion 31211 is vertically disposed and fixedly connected to the bottom fixed plate 3111. The upper straight portion 31212 is vertically disposed and fixedly connected to the upper fixed plate 3112. The position of the upper fixed plate 3112 corresponds to that of the lower fixed plate. One end of the bent guide portion 31213 is fixedly connected to the lower fixed plate, and the other end of the bent guide portion 31213 is fixedly connected to the upper fixed plate 3112. The lower straight portion 31211, the upper straight portion 31212, and the bent guide portion 31213 can be integrally formed and fixed by welding. The bent guide portion 31213 includes a plurality of interconnected bent portions. In this embodiment, there are three bent portions, which are connected end to end in sequence. By such a setting, the passage time of the NMP exhaust gas in the guide assembly 312 can be effectively increased, and the contact area between the NMP exhaust gas and the natural wind can be increased, so that the heat exchange between the NMP exhaust gas and the natural wind is more sufficient. It can be understood that the number of bending parts can be increased or decreased according to actual needs.
[0030] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.
[0031] The above-described embodiments merely represent several implementation methods of the present application. 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 a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.
Claims
1. A high-tower tail gas whitening device, comprising a high-tower structure (1), characterized in that: The invention also includes a filtering structure (2) and a heat exchange structure (3) arranged on the high tower structure (1); the heat exchange structure (3) includes an air-to-air heat exchanger (31), the air-to-air heat exchanger (31) includes a ventilation seat (311) and a flow guide assembly (312) arranged in the high tower structure (1), the ventilation seat (311) includes a bottom fixed plate (3111), an upper fixed plate (3112), and a side edge (3113) arranged between the bottom fixed plate (3111) and the upper fixed plate (3112), the bottom fixed plate (3111) and the upper fixed plate (3112) are provided with a plurality of air holes, the side edge (3113) is provided with a plurality of ventilation holes, and the flow guide assembly (312) includes a plurality of flow guides (3121) arranged on the ventilation seat (311).
2. A high tower tail gas whitening device according to claim 1, characterized in that: The bottom fixed plate (3111), the upper fixed plate (3112) and the side edge (3113) surround and form a cavity, and a plurality of the guide members (3121) are arranged in the cavity; and the plurality of the guide members (3121) are arranged along the edge direction of the ventilation seat (311).
3. A high tower tail gas whitening device according to claim 2, characterized in that: The plurality of flow guides (3121) are parallel to each other, and the plurality of flow guides (3121) are evenly arranged along the edge direction of the ventilation seat (311).
4. A high tower tail gas whitening device according to any one of claims 1 to 3, characterized in that: The flow guide (3121) comprises a lower straight portion (31211) connected to the bottom fixed plate (3111) and an upper straight portion (31212) connected to the upper fixed plate (3112), and a bent flow guide portion (31213) is provided between the lower straight portion (31211) and the upper straight portion (31212).
5. A high tower tail gas whitening device according to claim 4, characterized in that: The bent guide portion (31213) includes a plurality of mutually connected bent portions.
6. A high tower tail gas whitening device according to claim 1, characterized in that: The high tower structure (1) comprises a high tower body (11), wherein the high tower body (11) has an air inlet (111) and a tail outlet (112); the filtering structure (2) and the heat exchange structure (3) are located between the air inlet (111) and the tail outlet (112), and the filtering structure (2) is located below the heat exchange structure (3).
7. A high tower tail gas whitening device according to claim 6, characterized in that: The filtering structure (2) comprises a high tower filler (21) and a wire mesh demister (22) arranged on the high tower body (11); the high tower filler (21) and the wire mesh demister (22) are arranged along the height direction of the high tower body (11).