Water mist dust removal ring with compressed air blowing self-cleaning function

Abstract

The utility model discloses a water mist dust removal ring with compressed air purging self -cleaning function, including coaxial setting, and through the water mist water spraying ring and compressed air purging ring of connecting with many connecting rods, water mist water spraying ring is annular waterway structure, is equipped with the water inlet on water mist water spraying ring and evenly arranged with several water spraying nozzles, compressed air purging ring sets up in water mist water spraying ring's top, and the ring body diameter of compressed air purging ring is less than the ring body diameter of water mist water spraying ring. Advantages lie in: through the compressed air purging ring of smaller diameter coaxial addition above traditional water mist water spraying ring, utilize compressed air to continuously downward purging spray ring surface and shower nozzle, has realized to the automatic removal of dust and blockage, has prevented the shower nozzle blockage problem from the source, has guaranteed dust removal ring long -term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology, specifically to a water mist dust removal ring with compressed air blowing self-cleaning function. Background Technology

[0002] Water mist dust removal is a widely used industrial dust removal method. Its basic principle is to atomize water using a spray device, and then use the collision, wetting, and agglomeration of water mist particles with dust particles to cause the dust to settle, thus achieving dust removal. In water mist dust removal systems, the water mist dust removal ring, also known as a water mist spray ring or ring sprayer, is a common core component, typically installed near dust sources such as dust removal ducts, transfer points, and material discharge ports.

[0003] The most commonly used water mist dust removal ring is the single-ring spray structure, which mainly consists of a ring-shaped water pipe and several spray nozzles evenly distributed on the ring-shaped water pipe. The ring-shaped water pipe is connected to an external water supply pipeline through an inlet. During operation, the water supply system supplies water to the ring-shaped water pipe, and the water is atomized by the spray nozzles and sprayed out, forming a water mist coverage area around the spray ring. When dust-laden gas passes through the water mist area, the dust is captured and settled by the water mist. This type of single-ring spray structure is widely used due to its simple structure and low cost.

[0004] However, the above-mentioned single-ring water spray structure has the following serious defects when used in high-dust environments for a long time: First, in mining operations, coal conveyor bridges, construction sites, and other work sites, dust concentrations are often high. Water mist spray rings are constantly exposed to high dust environments, and dust particles continuously adhere to the outer wall of the spray ring and the surface of the nozzle, gradually forming a dust layer. This thickening dust layer not only affects the appearance of the spray ring but also alters the airflow field and water mist diffusion pattern near the nozzle, leading to uneven water mist coverage and reduced dust removal efficiency. Second, the diameter of the water outlet channels of water spray nozzles is typically only 0.5mm to 1.0mm, extremely small. In high-dust environments, dust particles can directly enter the nozzle outlet channels with the airflow, adhering and accumulating on the inner walls. Furthermore, after the nozzle stops spraying water, the residual moisture on the nozzle end face mixes with dust to form a mud-like substance, which dries and solidifies at the nozzle outlet, partially or completely blocking the outlet channels. When the nozzle is blocked, water cannot be properly atomized and sprayed, or the sprayed water mist particles become larger and unevenly distributed, leading to a sharp decline in dust removal efficiency or even complete failure. Meanwhile, water mist dust removal rings are generally installed at high locations, such as the top of roadways, above coal conveyor bridges, and the top of blast furnaces. When nozzles become clogged or dust accumulates on the rings, manual cleaning or disassembly for maintenance is required. Working at heights inherently carries the risk of falls, and the work sites are often confined, poorly lit, and contain harmful gases, further increasing the difficulty and safety risks of cleaning and maintenance. Furthermore, cleaning clogged nozzles usually requires stopping the machine to disassemble the rings, which is cumbersome and time-consuming. For production lines requiring continuous dust removal, such as underground coal mine faces and port unloading and transfer systems, frequent shutdowns for cleaning will severely impact production efficiency and make it difficult to guarantee equipment availability.

[0005] To address the aforementioned issues, some technologies have attempted to alleviate clogging by improving the nozzle's structure. For example, replacing direct-injection nozzles with annular water mist sprays alters the spray angle, making it less likely for external dust to directly enter the nozzle. However, these structural improvements only delay clogging and do not actively remove existing dust. Other methods involve installing filters within the nozzle to block large particles from entering the nozzle orifice, but these are ineffective against airborne dust. Still others utilize compressed air to create a water mist, reducing nozzle clogging; however, the compressed air is used for atomization rather than cleaning, leaving the nozzle still at risk of dust intrusion. Therefore, no definitive technical solution currently exists. Utility Model Content

[0006] To address the aforementioned problems, the present invention aims to provide a water mist dust removal ring with a compressed air purging self-cleaning function. By coaxially integrating the compressed air purging structure with the water mist spray ring, and utilizing compressed air to continuously and directionally purge the spray ring and nozzle, self-cleaning and anti-clogging are achieved.

[0007] This utility model is implemented by the following technical solution: A water mist dust removal ring with compressed air blowing self-cleaning function includes a water mist spray ring and a compressed air blowing ring that are coaxially arranged and connected by multiple connecting rods; The water mist spray ring is a ring-shaped water channel structure, and the water mist spray ring is provided with a water inlet and a number of spray nozzles are evenly arranged on it. The compressed air purging ring is positioned above the water mist spraying ring, and the diameter of the compressed air purging ring is smaller than the diameter of the water mist spraying ring. The compressed air purging ring has an air inlet and a plurality of purging holes evenly distributed on it, with the outlet of the purging holes facing the direction of the water mist spraying ring. The water mist spray ring is connected to an external water source through the water inlet, and the compressed air purging ring is connected to an external compressed air source through the air inlet.

[0008] Furthermore, the purge hole is a gradually expanding hole, and the diameter of the gradually expanding hole gradually increases from the inner wall of the compressed air purge ring to the outer wall.

[0009] Furthermore, the inlet diameter of the gradually expanding orifice is 1mm to 2mm, and the outlet diameter is 3mm to 5mm.

[0010] Furthermore, the wall thickness of the compressed air purge ring is 3mm to 5mm, and the material of the compressed air purge ring is stainless steel or aluminum alloy.

[0011] Furthermore, a threaded mounting hole is provided at the compressed air purge ring, and a purge nozzle is threadedly connected in the threaded mounting hole. The purge nozzle is trumpet-shaped.

[0012] Furthermore, the water spray nozzle is an atomizing nozzle, and the nozzle diameter is 0.5mm to 1.0mm, and the spray angle is 60° to 120°.

[0013] Furthermore, the water spray nozzle is threadedly connected to the water mist spray ring.

[0014] Furthermore, it includes multiple coaxially arranged water mist spray rings, with adjacent layers of water mist spray rings connected and fixed by multiple connecting pipes, and all of the water mist spray rings are located below the compressed air purging ring.

[0015] Advantages of this utility model: By adding a smaller-diameter compressed air blowing ring coaxially above the traditional water mist spray ring, compressed air continuously blows downwards onto the surface of the spray ring and the nozzles, automatically removing accumulated dust and blockages. This eliminates nozzle clogging at its source and ensures the long-term stable operation of the dust removal ring. The smaller diameter of the compressed air blowing ring compared to the water mist spray ring concentrates airflow onto the nozzle area, resulting in higher blowing efficiency and less compressed air consumption. The blowing holes employ a gradually expanding orifice or trumpet-shaped nozzle design, with the outlet facing the water mist spray ring, increasing the blowing area and precisely removing dust from the nozzle tip. This comprehensive blowing coverage significantly reduces the frequency of cleaning, thereby greatly reducing maintenance difficulty and operational safety risks. This invention has a simple structure and can be directly added to existing single-ring water spray structures without affecting the original water spray dust removal function. The water mist spray ring can adopt a multi-layered stacked structure, allowing for flexible configuration according to different dust conditions. Attached Figure Description

[0016] Figure 1 This is a bottom view of the structure of Example 1; Figure 2 This is a front view of Example 1. Figure 3 This is a bottom view of the structure of Example 2; Figure 4 This is a front view of Example 2. Figure 5 This is a bottom view of the structure in Example 3; Figure 6 This is a front structural diagram of Example 3.

[0017] In the diagram: 1-Water mist spray ring, 2-Water spray nozzle, 3-Compressed air purging ring, 4-Purge hole, 5-Connecting rod, 6-Purge nozzle, 7-Connecting pipe. Detailed Implementation

[0018] 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.

[0019] Example 1 like Figure 1 , Figure 2 The water mist dust removal ring shown includes a water mist spray ring 1 and a compressed air blowing ring 3. The water mist spray ring 1 and the compressed air blowing ring 3 are coaxially arranged and fixedly connected by three connecting rods 5.

[0020] The water mist spray ring 1 is a ring-shaped water pipe structure, made of bent stainless steel pipe with a pipe diameter of 20mm and a ring diameter of 500mm. The water mist spray ring 1 has a water inlet with an external threaded interface for connection to an external water supply pipeline. Twelve spray nozzles 2 are evenly arranged at the bottom of the water mist spray ring 1. Each spray nozzle 2 is an atomizing nozzle with a nozzle diameter of 0.8mm and a spray angle of 90°. The spray direction of the spray nozzles 2 is towards the inside of the water mist spray ring 1 and tilted downwards. The spray nozzles 2 are fixed to the water mist spray ring 1 by threaded connections.

[0021] The compressed air purge ring 3 is a closed-loop annular air passage structure, coaxially fixed above the water mist spray ring 1, with an axial distance of 80mm between them. The compressed air purge ring 3 is made of stainless steel, with a wall thickness of 4mm and a diameter of 300mm. The compressed air purge ring 3 has an air inlet with an external threaded interface for connection to an external compressed air pipeline. The recommended operating pressure of the compressed air is 0.3MPa to 0.5MPa.

[0022] The bottom of the compressed air purge ring 3 has 12 purge holes 4 evenly distributed on the side facing outwards, i.e. towards the water mist spray ring 1, and the outlet of the purge holes 4 faces the direction of the water mist spray ring 1.

[0023] The purge hole 4 is a gradually expanding hole, with its diameter gradually increasing from the inner wall to the outer wall of the compressed air purge ring 3. In this embodiment, the inlet diameter of the purge hole 4 is 1.5 mm, the outlet diameter is 4 mm, and the cone angle of the expanding section is 15°. When compressed air flows through the gradually expanding hole, the cross-sectional area gradually increases, causing the airflow diffusion range to continuously increase. This allows the purge airflow to evenly cover the corresponding water spray nozzle 2 below and the surrounding water mist spray ring 1, continuously purging the dust adhering to the nozzle surface, the nozzle outlet, and the outer wall of the water mist spray ring 1, thus preventing dust accumulation and solidification at the source.

[0024] The water mist spray ring 1 and the compressed air purging ring 3 are fixedly connected as a whole by connecting rods 5. The connecting rods 5 are evenly distributed along the circumference. The upper end of the connecting rod 5 is welded to the compressed air purging ring 3, and the lower end is welded to the water mist spray ring 1. The connecting rods 5 ensure the coaxiality and axial spacing stability of the two rings.

[0025] Job Description: The device is fixed to the ash discharge port of the ash silo by welding, with the water inlet connected to the water supply pipeline and the air inlet connected to the compressed air pipeline. During operation, both the water supply and compressed air systems are activated simultaneously. Water enters the annular water path of the water mist spray ring 1 through the water inlet, and is atomized and sprayed out through the water spray nozzles 2, forming a water mist coverage area. Simultaneously, compressed air enters the annular air path of the compressed air purging ring 3 through the air inlet, is accelerated through the gradually expanding purging holes 4, and is then sprayed downwards at an angle, precisely targeting the nozzle end face of the water spray nozzles 2 and the surface of the water mist spray ring 1. The water mist spray ring 1 continuously sprays water for dust removal, while the compressed air purging ring 3 continuously blows downwards to clean the ash. Both operate synchronously without interference. Under conditions of low dust concentration, intermittent purging can also be performed by activating the compressed air system to save compressed air consumption. During shutdown, the compressed air system is shut off first to stop purging, and then the water supply system is shut off to stop water spraying.

[0026] Actual testing showed that at a dust concentration of 100 mg / m³... 3 Under simulated operating conditions, after the water mist dust removal ring of this embodiment has been running continuously for 72 hours, there is no clogging of the water spray nozzle 2, the dust accumulation thickness on the surface of the spray ring does not exceed 0.3mm, and the dust removal efficiency remains above 95%; while under the same operating conditions, the traditional single-ring water spray structure has 3 nozzles that are clogged to varying degrees after 24 hours of operation.

[0027] Example 2 This embodiment has a basically the same structure as embodiment 1, the difference being the specific implementation of the purge hole 4: In this embodiment, as Figure 3 , 4 As shown, the compressed air purge ring 3 has a pre-drilled threaded mounting hole, into which a purge nozzle 6 is threadedly connected. The purge nozzle 6 is trumpet-shaped, meaning its inner cavity gradually widens from the inlet to the outlet. Specifically, the inner diameter of the inlet end of the purge nozzle 6 is 1.5 mm, the inner diameter of the outlet end is 4 mm, and the cone angle of the inner cavity is 15°. The overall height of the purge nozzle 6 is 15 mm, and its outer wall has external threads that mate with the threaded mounting hole of the compressed air purge ring 3.

[0028] The outlet of the purge nozzle 6 faces the direction of the water mist spray ring 1. After compressed air enters the annular air passage of the compressed air purge ring 3, it passes through the trumpet-shaped inner cavity of the purge nozzle 6 and blows downwards. The gradually expanding structure of the trumpet-shaped inner cavity is the same as the principle of the gradually expanding orifice in Embodiment 1, both utilizing the gradual increase of cross-sectional area to achieve comprehensive purging.

[0029] By using a detachable purge nozzle 6, when a purge nozzle 6 is worn or damaged due to long-term airflow scouring, the purge nozzle 6 can be unscrewed from the compressed air purge ring 3 for replacement without disassembling the compressed air purge ring 3 as a whole.

[0030] Example 3 The difference between this embodiment and Embodiment 2 is that: Figure 5 , 6 As shown, the water mist spray ring 1 has a double-layer structure, including an upper water mist spray ring 1 and a lower water mist spray ring 1. Both rings have the same diameter of 500mm. The two water mist spray rings 1 are connected and fixed by four connecting pipes 7, which are evenly distributed along the circumference. The connecting pipes 7 are made of stainless steel, and their upper and lower ends are welded to the upper and lower water mist spray rings 1 respectively. This not only achieves water circulation between the two rings but also serves as a fixing connector, ensuring the overall stability of the double-layer structure. The upper water mist spray ring 1 has a water inlet. External water enters the upper ring through the inlet and simultaneously enters the lower ring through the connecting pipes 7, achieving synchronous water supply. The axial distance between the two water mist spray rings 1 is 60mm.

[0031] This embodiment is suitable for harsh working scenarios with high dust levels and large spaces. The double-layer water mist spray ring 1 can form a double-layer water mist coverage area, which has a larger dust removal coverage area, higher water mist density, and stronger ability to capture high concentrations of dust.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 water mist dust removal ring with compressed air blowing self-cleaning function, characterized in that, This includes a water mist spray ring and a compressed air purge ring that are coaxially arranged and connected by multiple connecting rods; The water mist spray ring is a ring-shaped water channel structure, and the water mist spray ring is provided with a water inlet and a number of spray nozzles are evenly arranged on it. The compressed air purging ring is positioned above the water mist spraying ring, and the diameter of the compressed air purging ring is smaller than the diameter of the water mist spraying ring. The compressed air purging ring has an air inlet and a plurality of purging holes evenly distributed on it, with the outlet of the purging holes facing the direction of the water mist spraying ring. The water mist spray ring is connected to an external water source through the water inlet, and the compressed air purging ring is connected to an external compressed air source through the air inlet.

2. The water mist dust removal ring with compressed air blowing self-cleaning function according to claim 1, characterized in that, The purge hole is a gradually expanding hole, and the diameter of the gradually expanding hole gradually increases from the inner wall of the compressed air purge ring to the outer wall.

3. A water mist dust removal ring with compressed air blowing self-cleaning function according to claim 2, characterized in that, The inlet diameter of the gradually expanding orifice is 1mm to 2mm, and the outlet diameter is 3mm to 5mm.

4. A water mist dust removal ring with compressed air blowing self-cleaning function according to claim 2 or 3, characterized in that, The compressed air purging ring has a wall thickness of 3mm to 5mm and is made of stainless steel or aluminum alloy.

5. A water mist dust removal ring with compressed air blowing self-cleaning function according to claim 1, characterized in that, The compressed air purging ring has a threaded mounting hole, and a purging nozzle is threaded into the threaded mounting hole. The purging nozzle is trumpet-shaped.

6. A water mist dust removal ring with compressed air blowing self-cleaning function according to claim 1, characterized in that, The water spray nozzle is an atomizing nozzle with a nozzle diameter of 0.5mm to 1.0mm and a spray angle of 60° to 120°.

7. A water mist dust removal ring with compressed air purging self-cleaning function according to claim 1 or 6, characterized in that, The water spray nozzle is threadedly connected to the water mist spray ring.

8. A water mist dust removal ring with compressed air blowing self-cleaning function according to claim 1, characterized in that, It includes multiple coaxially arranged water mist spray rings, with adjacent layers of water mist spray rings connected and fixed by multiple connecting pipes, and all of the water mist spray rings are located below the compressed air purging ring.

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