A spray tower facilitating defogging

Abstract

This utility model provides a spray tower for easy demisting, including a tower body, a spray assembly, and a demisting assembly. The tower body has a first air inlet on a first side near the bottom, a second air inlet on a second side opposite the first side, and an air outlet in the middle area of ​​the top. The spray assembly includes at least two sets of swirl plates spaced apart and horizontally positioned above each air inlet, and spray elements formed above the swirl plates. The swirl plates are configured as rotating blades, and the airflow input from the air inlet generates rotation and centrifugal motion when passing through the rotating blades, causing the upward airflow to mix with the droplets provided by the spray elements and be thrown onto the tower wall. The demisting assembly includes multiple layers of demisting plates, which are horizontally positioned below the air outlet and above the swirl plates and spray elements. The diameter of the first air inlet is larger than the diameter of the second air inlet, and the second air inlet is positioned higher than the first air inlet, thereby expanding the applicability of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of defogging spray technology, and more specifically, to a spray tower that facilitates defogging. Background Technology

[0002] In the field of industrial waste gas treatment, spray towers are widely used due to their simple structure and low investment cost. However, traditional spray towers generally have many shortcomings. First, they mostly rely on static packing or simple demister grids to trap liquid droplets entrained in the airflow. The packing is usually in the form of blocks or rings, with regular and straight internal channels, making it difficult to generate sufficient turbulence and swirl, which greatly reduces the gas-liquid contact efficiency. As a result, a large number of tiny droplets cannot fully collide, aggregate, and settle, and are very likely to escape from the tower with the airflow, resulting in high mist content in the exhaust gas and failure to meet standards.

[0003] Secondly, in pursuit of higher absorption or washing efficiency, traditional designs often enlarge the packing layer or increase the area of ​​the demister mesh. However, this results in a greater pressure drop and a sharp increase in the risk of clogging. The packing channels and mesh pore sizes are easily clogged by particles and deposits, forcing the system to shut down frequently for cleaning and increasing operating and maintenance costs.

[0004] In particular, the passive operation of static packing and single-layer demisters is poorly adaptable to fluctuations in flow rate and changes in droplet size distribution. If there are significant fluctuations in airflow velocity, a "channel effect" will occur, causing the airflow to preferentially flow through the area of ​​lowest resistance, further reducing the overall treatment efficiency and making it difficult to meet the demister and absorption requirements under different operating conditions. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a spray tower that facilitates demisting, so as to solve the above problems.

[0006] The present invention adopts the following solution:

[0007] This application provides a spray tower for easy demisting, including a tank-shaped tower body and a spray assembly and a demisting assembly disposed within the tower body; the tower body has a first air inlet on a first side near the bottom, a second air inlet on a second side opposite the first side, and an air outlet in the middle region of the top; the spray assembly includes at least two sets of swirl plates spaced apart and horizontally positioned above each air inlet, and spray elements formed above the swirl plates; the swirl plates are configured as rotating blades, and the airflow input from the air inlet generates rotation and centrifugal motion when passing through the rotating blades, causing the upward airflow to mix with the droplets provided by the spray elements and be thrown onto the tower wall; the demisting assembly includes multiple layers of demisting plates, which are horizontally positioned below the air outlet and above the swirl plates and spray elements; the diameter of the first air inlet is larger than the diameter of the second air inlet, and the second air inlet is positioned higher than the first air inlet.

[0008] As a further improvement, the spray element includes a plate placed horizontally inside the tower body that allows airflow to enter and exit, and a plurality of liquid outlet nozzles formed on the plate.

[0009] As a further improvement, the liquid outlet nozzles are provided in more than five and are arranged at intervals on the lower end face of the plate to form a downward spray state.

[0010] As a further improvement, one spray element is formed between the two swirl plates, and the other spray element is formed above the uppermost swirl plate.

[0011] As a further improvement, a backwash plate is also provided below the demister plate, which is horizontally placed inside the tower body and allows airflow to enter and exit. The backwash plate is provided with multiple liquid outlet nozzles that are spaced apart on the upper surface of the plate to form an upward spray state.

[0012] As a further improvement, the demister plate is configured as a baffle plate or a swirl plate.

[0013] As a further improvement, the bottom of the tower body is configured as a cone, which is made of at least six steel plates joined together.

[0014] As a further improvement, an inspection port and a glass plate are correspondingly provided on one side of the top of the tower body, and the glass plate is detachably mounted on the inspection port.

[0015] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0016] 1. The spray tower for easy demisting of this application has a swirl plate with a rotating blade structure. By taking advantage of the centrifugal and rotational motion generated when the airflow passes through the blade, the airflow is fully mixed with the liquid droplets sprayed by the spray element during the rising process, which increases the gas-liquid contact intensity and improves the absorption and washing efficiency of pollutants.

[0017] 2. Among them, multi-level demister plates are placed between the spray zone and the air outlet to form a cascade droplet collection mode. After the droplets thrown towards the tower wall by the swirling flow are initially separated, the remaining fine droplets are repeatedly impacted and condensed in the multi-level demister plates, thereby significantly reducing the droplet content in the exhaust gas and achieving efficient demisting.

[0018] 3. Furthermore, the first air inlet has a large diameter and a low position, which can accept a large flow of gas, while the second air inlet has a small diameter and a high position, which is used to supplement the segmented air intake. The size and height difference between the two are matched, so that the airflow forms a reasonable velocity gradient in the tower, which helps the airflow to diffuse evenly, avoids the "channel effect", and reduces local scouring or short-circuiting phenomena.

[0019] 4. Furthermore, by replacing large-area static packing with swirl spraying, the pressure drop caused by the packing layer is reduced. The multi-layer demister plate has a compact structure, is easy to disassemble and clean, and avoids the problems of easy clogging and cumbersome maintenance of traditional packing and mesh demister plates, thus improving the reliability and economic efficiency of the system.

[0020] 5. In particular, the combined spraying and demisting layout of the entire spray tower has a better adaptability to changes in airflow and droplet size. It can still maintain stable demisting and washing performance under different gas flow and suspended droplet distribution conditions, thus expanding the applicability of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a spray tower for easy demisting according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the spray tower for easy demisting according to an embodiment of the present utility model from another perspective;

[0023] Figure 3 This is a schematic diagram of the swirl plate of a spray tower for easy demisting according to an embodiment of the present invention.

[0024] icon:

[0025] 1-Tower body; 2-First air inlet; 3-Second air inlet; 4-Air outlet; 5-Swirl plate; 6-Sprayer component; 7-Demisting plate; 8-Plate body; 9-Liquid outlet nozzle; 10-Backwash plate; 11-Inspection port. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0027] Example

[0028] Combination Figures 1 to 3 This embodiment provides a spray tower for easy demisting, including a tank-shaped tower body 1, and a spray assembly and a demisting assembly disposed within the tower body 1. The tower body 1 has a first air inlet 2 on a first side near the bottom, a second air inlet 3 on a second side opposite the first side, and an air outlet 4 in the middle region of the top. The spray assembly includes at least two sets of swirl plates 5 spaced apart and horizontally positioned above each air inlet, and spray elements 6 formed above the swirl plates 5. The swirl plates 5 are configured as rotating blades; when the airflow input from the air inlet passes through the rotating blades, it generates rotation and centrifugal motion, causing the upward airflow to mix with the droplets provided by the spray elements 6 and be thrown against the tower wall. The defogging assembly includes multiple layers of defogging plates 7, which are horizontally positioned below the air outlet 4 and above the swirl plate 5 and the spray element 6. The diameter of the first air inlet 2 is larger than the diameter of the second air inlet 3, and the second air inlet 3 is located higher than the first air inlet 2.

[0029] The swirl plate 5 of the spray tower uses a rotating blade structure to make the airflow fully mix with the liquid droplets sprayed by the spray element 6 during the upward process by taking advantage of the centrifugal and rotational motion generated when the airflow passes through the blades. This increases the gas-liquid contact intensity and improves the absorption and washing efficiency of pollutants.

[0030] Multi-level demister plates 7 are placed between the spray zone and the air outlet 4 to form a cascaded droplet collection mode. After the droplets thrown towards the tower wall by the swirling flow are initially separated, the remaining fine droplets are repeatedly impacted and condensed in the multi-level demister plates 7, thereby significantly reducing the droplet content in the exhaust gas and achieving efficient demisting.

[0031] The first air inlet 2 has a large diameter and a low position, which can accept a large flow of gas. The second air inlet 3 has a small diameter and a high position, which is used to supplement the segmented air intake. The size and height difference between the two are matched so that the airflow forms a reasonable velocity gradient in the tower, which helps the airflow to diffuse evenly, avoids the "channel effect", and reduces local scouring or short-circuiting.

[0032] By replacing large-area static packing with swirling spray, the pressure drop caused by the packing layer is reduced. The multi-layer demister plate 7 has a compact structure, is easy to disassemble and clean, and avoids the problems of easy clogging and cumbersome maintenance of traditional packing and mesh demister plate 7, thus improving the reliability and economic efficiency of the system.

[0033] The combined spraying and demisting layout of the entire spray tower has better adaptability to changes in airflow and droplet size. It can maintain stable demisting and washing performance under different gas flow and suspended droplet distribution conditions, thus expanding the applicability of the equipment.

[0034] In this embodiment, the spray element 6 includes a plate 8 horizontally placed inside the tower body 1, allowing airflow to enter and exit, and multiple liquid outlet nozzles 9 formed on the plate 8. On one hand, the plate 8's horizontal placement within the tower allows for free airflow, and combined with the multiple liquid outlet nozzles 9 distributed on the plate surface, it enables wide-area, uniform liquid spraying, avoiding localized "dry zones" or spray dead zones, and ensuring consistent cleaning / absorption effects across the entire gas-liquid contact cross-section. On the other hand, the perforated design of the plate 8 both supports the nozzles and allows airflow to pass through, enabling the airflow to directly interact with the sprayed droplets as it passes through the spray zone, enhancing swirling and turbulent intensity, thereby improving gas-liquid mixing efficiency and pollutant absorption capacity.

[0035] Specifically, five or more liquid outlet nozzles 9 are provided and arranged at intervals on the lower end face of the plate 8 to form a downward spray pattern. Clearly, the interval arrangement of five or more nozzles can form a uniform mist-like liquid film on the lower end face of the plate 8, expanding the spray area and avoiding the "spray dead zones" that are easily created by traditional nozzles with only a few nozzles. Furthermore, the multi-path downward spray ensures that the airflow is fully surrounded and impacted by droplets injected at multiple points as it passes through the spray area, enhancing turbulence and mixing effects, thereby improving the absorption and washing efficiency of pollutants.

[0036] One spray element 6 is formed between two swirl plates 5, and the other spray element 6 is formed above the uppermost swirl plate 5. Placing one spray element 6 between two adjacent swirl plates 5 allows for mid-stage airflow replenishment during the swirling washing process, providing a secondary wash to the initially separated droplets and enhancing the pollutant removal rate in the middle stage. Additionally, another spray element 6 is provided above the uppermost swirl plate 5, providing a final stage of fine spraying before the airflow enters the demister assembly, forming a gradient washing mode of "coarse first, then fine, and a combination of coarse and fine sprays," further improving overall absorption and washing efficiency.

[0037] In this embodiment, a backwash plate 10 is also provided below the demister plate 7, horizontally placed inside the tower body 1 and allowing airflow to enter and exit. The backwash plate 10 has multiple liquid outlet nozzles 9 arranged at intervals on the upper surface of the plate body 8 to form an upward spray state. Thus, the upward spray nozzles arranged below the backwash plate 10 can periodically or continuously spray and flush the back of the demister plate 7, effectively washing away flocculent matter and deposits adhering to the surface of the demister plate 7, preventing blockage, and keeping the demister channel unobstructed. The upward spray nozzles arranged below the backwash plate 10 can periodically or continuously spray and flush the back of the demister plate 7, effectively washing away flocculent matter and deposits adhering to the surface of the demister plate 7, preventing blockage, and keeping the demister channel unobstructed.

[0038] In this embodiment, the demister plate 7 is configured as a baffle plate or a swirl plate 5. It is understood that the baffle plate achieves inertial collision separation by changing the airflow direction. Alternatively, the swirl plate 5 uses centrifugal force to throw droplets onto the plate surface or tower wall; the combination of these two methods can form multiple separation paths, significantly improving demister efficiency. Furthermore, the baffle plate is highly effective at separating medium to large droplets, while the swirl plate 5 has a stronger centrifugal capture capability for fine droplets, making it more adaptable.

[0039] The bottom of the tower body 1 is configured as a cone, which is composed of at least six steel plates. The conical bottom allows liquid or sludge inside the tower to quickly collect under gravity and be discharged centrally from the bottom, preventing liquid or solid accumulation at the bottom and ensuring smooth sludge discharge during continuous operation. The polygonal cone, composed of six or more steel plates, through reasonable segmentation and weld arrangement, enhances the bending and compressive strength of each plate, resulting in a more robust and durable overall structure.

[0040] The tower body 1 has an inspection port 11 and a glass plate on one side of its top. The glass plate is detachably mounted on the inspection port 11. This provides direct access to the tower, allowing operators to quickly perform internal visual inspections, cleaning, or component replacements without disassembling large parts, significantly reducing maintenance time and downtime losses. Correspondingly, the detachable glass plate allows observation of the tower's internal operating status, such as spray patterns, liquid accumulation or blockage in the demister plate 7, without opening the inspection port 11, enabling online monitoring and timely detection and handling of anomalies.

[0041] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions that fall within the scope of this utility model's concept are protected by this utility model.

Claims

1. A spray tower for easy demisting, characterized in that, It includes a tank-shaped tower body, and spray and demisting components installed inside the tower body; The tower body has a first air inlet on a first side near the bottom, a second air inlet on a second side opposite the first side, and an air outlet in the middle area of ​​the top. The spray assembly includes at least two sets of swirl plates spaced apart and horizontally positioned above each air inlet, and spray elements formed above the swirl plates; and the swirl plates are configured as rotating blades, and the airflow input from the air inlet generates rotation and centrifugal motion when passing through the rotating blades, so that the upward airflow and the droplets provided by the spray elements mix with each other and are thrown onto the tower wall. The demisting assembly includes multiple layers of demisting plates, which are positioned horizontally below the air outlet and above the swirl plate and the spray element. The diameter of the first air inlet is larger than that of the second air inlet, and the second air inlet is located higher than that of the first air inlet.

2. The spray tower for easy demisting according to claim 1, characterized in that, The spraying component includes a plate placed horizontally inside the tower body that allows airflow to enter and exit, and multiple liquid outlet nozzles formed on the plate.

3. The spray tower for easy demisting according to claim 2, characterized in that, The liquid outlet nozzles are provided in more than five and are arranged at intervals on the lower end face of the plate to form a downward spray state.

4. The spray tower for easy demisting according to claim 2, characterized in that, One spray element is formed between the two swirl plates, and the other spray element is formed above the uppermost swirl plate.

5. The spray tower for easy demisting according to claim 1, characterized in that, Below the demister plate, there is a backwash plate that is horizontally placed inside the tower body and allows airflow to enter and exit. The backwash plate is provided with multiple liquid outlet nozzles that are spaced apart on the upper surface of the plate to form an upward spray state.

6. The spray tower for easy demisting according to claim 1, characterized in that, The demister is configured as a baffle or a swirl plate.

7. The spray tower for easy demisting according to claim 1, characterized in that, The bottom of the tower is configured as a cone, which is made up of at least six steel plates joined together.

8. The spray tower for easy demisting according to claim 1, characterized in that, An inspection port and a glass plate are provided on one side of the top of the tower body, and the glass plate is detachably mounted on the inspection port.

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