An internal suction spray dust removal device

Abstract

An internal suction spray dust suppression device belongs to the field of industrial environmental protection technology. This invention solves the problem of adapting to situations where dust and mist are emitted from multiple points in large spaces, effectively improving the working environment. The shell structure of this invention is a cavity with openings at the lower and upper parts; a stacked filter frame is installed at the lower opening of the shell, completely closing the opening; a fan is bolted to the upper opening of the shell; a wire mesh demister is installed in the middle of the shell; a water-containing filter layer has the same planar dimensions as the stacked filter frame and is attached to the inner side of the stacked filter frame; a spray system is set in the spray cavity formed between the water-containing filter layer and the wire mesh demister, and fixed to the shell; a drainage system is set on the shell, located on the lowermost outer side of the stacked filter frame; a mounting bracket is fixed to the outside of the shell; and a gas collection hood is fixed to the upper part of the shell outside the stacked filter frame. The invention is characterized by its compact structure, small and flexible overall size, and convenient installation.

Description

Technical Field

[0001] This invention belongs to the field of industrial environmental protection technology and is applicable to various large-space, multi-point dust and mist emission situations. Background Technology

[0002] Atmospheric environmental protection technology began with the treatment of exhaust gases from various industrial chimneys. With increasing public awareness of environmental protection, there is now an urgent need to improve air quality in all working environments. Many situations involve large spaces with multiple points of dust and mist emission. For example, in metal rolling mills, each mill is a pollution source, generating large amounts of metal oxide dust, oil mist, and vapor, characterized by complex gas composition. In large material yards, mines, painting and welding workshops, each work surface is a pollution source, generating large amounts of dust or fumes, characterized by their non-fixed location. Existing treatment methods include workshop ventilation and localized spraying, but these are incomplete and affect the health of on-site workers. Some methods use multi-point collection and centralized filtration, which involves large investments, high energy consumption, and is not conducive to carbon emission reduction. For example, this method is often used in hot rolling mills, but metal oxide dust has a high density and contains oil and water, requiring high air velocities to prevent dust accumulation in pipes. Furthermore, the buildup of scale on dry filter materials worsens over time, increasing pressure resistance and leading to significant energy waste. Summary of the Invention

[0003] The purpose of this invention is to provide an internal suction spray dust removal device that collects and treats dust-laden air nearby through a low-resistance, multi-layered technical approach, effectively improving the working environment, adapting to situations where dust and mist are emitted from multiple points in a large space, and meeting environmental protection requirements.

[0004] An internal suction spray dust suppression device is characterized by comprising a housing 1, a stacked filter frame 2, a water-containing filter layer 3, a spray system 4, a wire mesh demister 5, a fan 6, a drainage system 7, a mounting bracket 8, and a gas collection hood 9; the housing 1 is a cavity with openings at the lower and upper parts; the stacked filter frame 2 is installed on the cross-section of the lower opening of the housing 1, completely closing the opening; the fan 6 is bolted to the upper opening of the housing 1; the wire mesh demister 5 is installed in the middle of the housing 1. Between the shingled filter frame 2 and the fan 6; the planar dimensions of the water-containing filter layer 3 are the same as those of the shingled filter frame 2, and it is attached to the inner side of the shingled filter frame 2; the spray system 4 is set in the spray chamber formed between the water-containing filter layer 3 and the wire mesh demister 5, and is fixed to the housing 1; the drainage system 7 is set on the housing, located on the outermost part of the bottom of the shingled filter frame 2; the mounting bracket 8 is fixed to the outside of the housing to fix the demister to the external equipment; the gas collection hood 9 is fixed to the upper part outside the shingled filter frame 2 to collect the dust-laden air.

[0005] The cascade filter frame 2 consists of two layers: cascade 201 and bracket 202. It is installed at the lower opening of the housing 1 at an angle of approximately 30°-80° to the horizontal direction, completely closing the opening. The cascade 201 faces outward, and the bracket 202 faces inward.

[0006] The drainage system 7 consists of a water receiving trough 701, a flange 702, and a drain pipe 703, and is fixed on the shell 1 at the bottom outermost part of the stacked filter frame 2. The water receiving trough 701 is arranged along the width of the shell 1, and the bottom of the trough is inclined at an angle to the horizontal direction. The flange 702 and the drain pipe 703 are located on the lower side of the water receiving trough 701.

[0007] The shingled tiles 201 have a multi-layer structure with gaps between the layers to allow airflow; the lower part of the upper shingled tile overlaps with the upper part of the adjacent lower shingled tile in the vertical direction.

[0008] The bottom of the trough is inclined at an angle to the horizontal direction, with an angle of 1°-3°.

[0009] The main innovation of this invention lies in the arrangement of the shingled filter frame. Inside the equipment, spray water and condensate combine with dust and mist, dripping from the top onto the filter layer. The water-containing filter layer further adsorbs the dust and mist. Water seeping down from the filter layer onto the shingled filter frame drips along the layers of tiles, converging at the bottom tile, and is then collected through a drainage system. The main function of the shingled filter frame is to prevent water from leaking into the external environment. Simultaneously, dust-laden air enters the equipment through the layers of the shingled filter frame, passing through the water curtain between the tiles and the mist barrier created by splashing, combined with mechanical collisions. This process achieves a certain degree of separation of dust and mist at the equipment inlet. Furthermore, the shingled filter frame arrangement makes the equipment inlet both the processing surface and the dry / wet interface. More filtration facilities can be installed on the outside of the shingled filter frame for dry non-filtration separation, allowing for both dry and wet separation modes on the same equipment to accommodate the purification of air with various components.

[0010] Advantages of this invention:

[0011] 1. The structure is compact. The airflow is in a counter-current contact state with the spray droplets and water flow throughout the entire process inside the device. At the same time, the device is small and flexible, easy to install, and can achieve local separation and treatment, reducing long-distance transportation of dust and mist. It has high dust and mist removal efficiency, low energy consumption, and can even use a mobile power supply. It also does not require filter consumables.

[0012] 2. Due to the compact size of the device, the fan outlet can directly discharge clean air. By appropriately adjusting the direction of the fan outlet according to the characteristics of the work environment, a small environment full of clean air can be created for the staff, thereby improving their occupational health.

[0013] 3. Various dry non-filtration purification facilities can be integrated in addition to the stacked filter frame at the entrance, making it suitable for various large spaces with multiple points of dust and mist with complex components, and has wide applicability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal suction spray dust removal device provided in an embodiment of the present invention.

[0015] 1-Shell; 2-Walled filter frame; 3-Water-containing filter layer; 4-Spray system; 5-Wire mesh demister; 6-Fan; 7-Drainage system; 8-Mounting bracket; 9-Gas collection hood.

[0016] 201-Layer tiles, 202-Bracket.

[0017] Figure 2 for Figure 1 AA sectional view.

[0018] 401 - Water supply pipe, 402 - Atomizing nozzle.

[0019] Figure 3 for Figure 1 BB cross-sectional view.

[0020] 701 - Water inlet, 702 - Connecting flange, 703 - Drain pipe. Detailed Implementation

[0021] The dust removal and mist removal device mounting bracket 8 of the present invention is fixed at an appropriate position outside the housing 1, thereby indirectly fixing the demister to an external device, which is used in situations where the dust and mist generation point is relatively fixed; it can also be made in a movable manner, which is suitable for situations where the dust and mist generation point frequently changes. Figure 1 The figure shown is a movable embodiment of the present invention.

[0022] like Figure 1 The internal suction spray dust removal device shown includes a housing 1, a stacked filter frame 2, a water-containing filter layer 3, a spray system 4, a wire mesh demister 5, a fan 6, a drainage system 7, a mounting bracket 8, and a gas collection hood 9.

[0023] The housing 1 has a structure consisting of a cavity with openings at the lower and upper parts, with the lower opening facing the dust / fog generation point during installation. An inspection door is provided on the side of the housing 1.

[0024] The cascade filter frame 2 consists of two layers: cascades 201 and brackets 202. It is installed at the lower opening of the aforementioned housing 1, at an angle of approximately 45 degrees to the horizontal (30-80 degrees), completely closing the opening. The cascades 201 face outwards, and the brackets 202 face inwards. The cascades 201 have a multi-layered structure with gaps between the layers to allow airflow. The lower part of the upper cascade overlaps vertically with the upper part of the adjacent lower cascade, ensuring that water flowing from the upper cascade is caught by the adjacent lower cascade and cannot leak out between the layers.

[0025] The fan 6 is installed at the upper opening of the housing 1; the wire mesh demister 5 is installed between the stacked filter frame 2 and the fan 6 in the middle of the housing 1.

[0026] The planar dimensions of the water-containing filter layer 3 are the same as those of the shingled filter frame 2, and it is attached to the bracket 202.

[0027] The spray system 4 is located in the spray chamber formed between the water-containing filter layer 3 and the wire mesh demister 5, and consists of a water supply pipe 401 and atomizing nozzles 402. The two ends of the water supply pipe 401 are fixed to the housing 1, and the atomizing nozzles 402 are evenly distributed on the water supply pipe 401. One or both ends of the water supply pipe 401 are connected to an external water source.

[0028] The drainage system 7 is located on the outermost part of the bottom of the stacked filter frame 2; it consists of a water receiving trough 701, a flange 702, and a drain pipe 703, and is fixed to the housing 1. The water receiving trough 701 is arranged along the width of the housing 1, and the bottom of the trough has an inclination angle of 1°-3° with the horizontal direction. The flange 702 and the drain pipe 703 are located on the lower side of the water receiving trough 701.

[0029] The mounting bracket 8 can be fixed at any position outside the housing as needed to fix the demister to external equipment. Here, it is listed as a movable type for occasions where the dust and fog generation point frequently changes.

[0030] The gas collection hood 9 is fixed to the housing 1 or related equipment and located on the upper part outside the stacked filter frame 2, for the purpose of surrounding and collecting dust-laden air.

[0031] The specific implementation of this invention is as follows:

[0032] Based on the actual site conditions, the air outlet direction of fan 6 and the structure of gas collection hood 9 were rationally designed. This dust and mist removal device is installed above and to the side of the dust and mist generation point inside the workshop. Water is introduced from outside the device via a water supply pipe. Atomizing nozzles spray mist particles onto the lower surface of the wire mesh demister, which then bounces and diffuses throughout the spray chamber. The mist then drips onto the filter layer, causing it to absorb water. The seeping water drips layer by layer onto the stacked tiles, forming a water curtain. When the fan is started, the air containing dust and mist passes through the stacked filter frame and the water-containing filter layer into the housing under the fan's suction. Most of the impurities in the air are adsorbed by the water curtain and the water-containing filter layer and carried away by the flowing water. The remaining impurity particles carried by the gas entering the spray chamber inside the housing are adsorbed by the spray droplets and fall with the water. The gas continues to be drawn upwards, passing through the wire mesh demister. The small droplets are separated by collision and convergence, and clean air is discharged from the fan outlet.

[0033] Because the spray mist and water flow are in a counter-current contact state throughout the entire process within the device, the water flows from spaces with low impurity concentration to spaces with high impurity concentration. Especially on stacked tiles, the same stream of water sequentially contacts the high-impurity-concentration air between more than a dozen layers before flowing out and merging into the drainage system. This results in high utilization efficiency of the spray water and water conservation. The drainage system can directly discharge harmless dusty wastewater, or it can be stored in a collection device for extraction of harmful or useful components for recycling.

[0034] The air outlet of fan 6 can be directed directly towards the area where on-site workers are located, or its direction can be changed and connected to the area where workers are located through ventilation ducts. In unmanned factories, it can also be directed towards the equipment components, instruments, etc. that need to be cleaned.

[0035] The necessary conditions for implementing the dust removal mist device of the present invention are the availability of a power source and a water source. In cases where these conditions are not met, a portable power unit is required.

Claims

1. An internal suction type spray dust removal device, characterized in that, The system includes a housing (1), a stacked filter frame (2), a water-containing filter layer (3), a spray system (4), a wire mesh demister (5), a fan (6), a drainage system (7), a mounting bracket (8), and a gas collection hood (9). The housing (1) is a cavity with openings at the lower and upper parts. The stacked filter frame (2) is installed on the cross-section of the lower opening of the housing (1), completely closing the opening. The fan (6) is bolted to the upper opening of the housing (1). The wire mesh demister (5) is installed in the middle of the housing (1), above the stacked filter frame (9). 2) Between the water-containing filter layer (3) and the fan (6); the planar dimensions of the water-containing filter layer (3) are the same as those of the shingled filter frame (2), and it is attached to the inner side of the shingled filter frame (2); the spray system (4) is set in the spray chamber formed between the water-containing filter layer (3) and the wire mesh demister (5), and is fixed on the housing (1); the drainage system (7) is set on the housing, located on the outermost part of the shingled filter frame (2); the mounting bracket (8) is fixed on the outside of the housing to fix the demister on the external equipment; the gas collection hood (9) is fixed on the upper part outside the shingled filter frame (2) to collect the dust-laden air.

2. The internal suction spray dust removal device according to claim 1, characterized in that, The cascade filter frame (2) consists of two layers: cascade (201) and bracket (202). It is installed at the lower opening of the shell (1) at an angle of approximately 30°-80° to the horizontal direction, completely closing the opening. The cascade (201) faces outward, and the bracket (202) faces inward.

3. The internal suction spray dust removal device according to claim 1, characterized in that, The drainage system (7) consists of a water receiving trough (701), a flange (702), and a drain pipe (703), which is fixed on the shell (1) and located on the outermost part of the stacked filter frame (2). The water receiving trough (701) is arranged along the width of the shell (1), and the bottom of the trough is inclined at an angle to the horizontal direction. The flange (702) and the drain pipe (703) are located on the lower side of the water receiving trough (701).

4. The internal suction type spray dust removal device according to claim 2, characterized in that, The shingled tiles (201) are multi-layered structures with gaps between layers for airflow; the lower part of the upper shingled tile overlaps with the upper part of the adjacent lower shingled tile in the vertical direction.

5. The internal suction spray dust removal device according to claim 3, characterized in that, The bottom of the trough is inclined at an angle to the horizontal direction, with an angle of 1°-3°.

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