Wet dust removal device and method for iron steel slag treatment

Abstract

The invention discloses a wet dust removal device and method for iron steel slag treatment, and relates to the technical field of dust removal devices.The wet dust removal device comprises a dust removal tower with a spraying opening and a dust inlet formed in the top; a gas film isolation mechanism is arranged in the dust removal tower; the air film isolation mechanism comprises a first air injection ring and a second air injection ring. The gas film isolation mechanism is arranged, gas films are formed on the inner wall of the dust removal tower, the top gas film vertically and downwards covers the upper section of the tower wall, the middle gas film obliquely and downwards covers the middle and lower section of the tower wall, the two layers of gas films form a gas curtain barrier on the tower wall, when dust enters the tower along with airflow, the gas films prevent the dust from making direct contact with the tower wall, and scaling is avoided; cleaning of the dust removal tower is reduced, and long-term efficient use of the dust removal tower is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal devices, and in particular to a wet dust removal device and method for treating iron and steel slag. Background Art

[0002] As an industrial solid waste, steel slag has a certain recycling value. Since steel slag generally undergoes crushing and sorting processes during recycling, it will produce a large amount of dust. Therefore, a dedicated dust removal device is required. However, the existing wet dust removal device for steel slag treatment still has the following defects during use: For example, Chinese patent publication number CN115555246A discloses a steelmaking slag dust removal device, which includes a chassis, a controller, a feed pipe and several universal wheels. The controller and the feed pipe are both arranged on the chassis, and the several universal wheels are symmetrically arranged on the chassis. The dust removal device also includes: a screen, which is movably arranged in the chassis and the two are elastically connected; a dust removal system, which is arranged on the chassis and is used to remove dust in the slag; and a transmission module, which is arranged between the dust removal system and the screen. When the dust removal system is working, the transmission module controls the movement of the screen; this device can utilize a linkage structure to turn the slag over while removing dust, thereby achieving dust removal without dead angles for the slag and achieving better dust removal effect.

[0003] Since steel slag dust is rich in alkaline oxides such as calcium oxide and magnesium oxide, it will quickly undergo a hydration reaction after coming into contact with water in the dust removal device, causing the inner wall surface of the dust removal device to gradually deposit and harden, forming a dense and hard scale layer; as the operating time increases, the scale layer continues to thicken, which will affect the uniformity of the spray system and ultimately cause the overall performance of the dust removal device to decline; in order to ensure the dust removal effect, the existing technology generally requires regular shutdown and the use of mechanical scraping, chemical cleaning and other methods to clean the scale layer, but frequent shutdown maintenance not only increases labor and material costs, but also affects the continuity of steel slag treatment and production efficiency. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a wet dust removal device and method for iron and steel slag treatment, which is used to solve the problem proposed in the above-mentioned background technology that the existing wet dust removal device for iron and steel slag treatment is prone to scaling on the inner wall of the dust removal device, requires regular treatment, and affects the continuity and production efficiency of steel slag treatment.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A wet dust removal device for treating iron and steel slag comprises a dust removal tower with a spray port and a dust inlet provided on the top; an air film isolation mechanism is provided in the dust removal tower; the air film isolation mechanism comprises: A first jet ring and a second jet ring; wherein the first jet ring is installed on the inner wall of the top of the dust removal tower; a first accumulation chamber is opened in the first jet ring, and a plurality of first jet holes are opened on the first jet ring, and the first jet holes are connected to the first accumulation chamber; the outlet of the first jet hole is arranged parallel to the inner wall of the dust removal tower, so that when the airflow is discharged through the first jet hole, a downward-flowing air film is formed on the inner wall of the dust removal tower; the second jet ring is installed on the inner wall of the middle part of the dust removal tower; a second accumulation chamber is opened in the second jet ring, and a plurality of second jet holes are opened on the second jet ring, and the second jet holes are connected to the second accumulation chamber; the outlet of the second jet hole is arranged obliquely to the inner wall of the dust removal tower, so that when the airflow is discharged through the second jet hole, an oblique downward impact is formed on the inner wall of the dust removal tower, thereby forming an air film on the inner wall of the dust removal tower; a plurality of guide grooves are spaced apart on the second jet ring, and are used to allow the airflow to pass close to the second jet ring to form an air film.

[0006] Preferably, the air film isolation mechanism also includes a first air pressure control valve and a second air pressure control valve; the first air pressure control valve is installed on the first jet ring and is used to control the air pressure in the first accumulation chamber; the second air pressure control valve is installed on the second jet ring and is used to control the air pressure in the second accumulation chamber.

[0007] Preferably, a mixing mechanism is provided at the bottom of the dust removal tower; the mixing mechanism is used to form an airflow toward the top of the dust removal tower to promote mixing between dust and spray water.

[0008] Preferably, the mixing mechanism includes a first adjusting mechanism and a plurality of nozzles; the plurality of nozzles are arranged at the bottom of the dust removal tower; the first adjusting mechanism is installed on the dust removal tower and is used to adjust the direction of the nozzles.

[0009] Preferably, the first adjusting mechanism includes a sleeve, a first connecting shaft, a second connecting shaft, a first slider and a driving mechanism; the sleeve is fixed to the dust removal tower along the radial direction of the dust removal tower, the first connecting shaft is coaxially plugged into the sleeve, the nozzle is connected to the sleeve by rotating around the axis of the first connecting shaft, and the nozzle is connected to the first connecting shaft, the second connecting shaft is plugged into the sleeve, one end of the second connecting shaft is sleeved on the first connecting shaft, a spiral groove is provided on the first connecting shaft, the first slider is fixed to the second connecting shaft, and the first slider is slidably connected to the spiral groove; the driving mechanism is installed on the dust removal tower, and the other end of the second connecting shaft is connected to the driving mechanism; the driving mechanism is used to drive multiple second connecting shafts to move along their axes.

[0010] Preferably, the first adjusting mechanism also includes an air collecting pipe and a plurality of connecting pipes; the air collecting pipe is installed on the dust removal tower, one end of each connecting pipe passes through the axial position of each first connecting shaft and is connected to the nozzle, and the other end of the connecting pipe is connected to the air collecting pipe; a telescopic airbag is provided on the connecting pipe at a position between the first connecting shaft and the second connecting shaft, and is used to prevent interference with the relative movement between the second connecting shaft and the first connecting shaft.

[0011] Preferably, the driving mechanism includes a rotating ring, a cylinder, a plurality of guide rails, a second slider and a rotating rod; the plurality of guide rails are fixed to the dust removal tower along the radial direction of the dust removal tower, the second slider is slidably connected to the guide rails, the rotating ring is coaxially sleeved on the dust removal tower, and each of the rotating rods is arranged between the rotating ring and each of the second sliders; the cylinder is installed on the dust removal tower and is used to drive the rotation around its axis to drive the second slider to move along the length direction of the guide rails.

[0012] Preferably, the first adjustment mechanism further includes a second adjustment mechanism; the second adjustment mechanism is used to adjust the angle of the airflow ejected upward by the nozzle.

[0013] Preferably, the second adjustment mechanism includes a rotating shaft, a driving gear, a driven gear and a rotating sleeve; the rotating sleeve is coaxially inserted into the shaft sleeve, and a torsion spring is provided between the rotating sleeve and the shaft sleeve, the nozzle is rotatably connected to the rotating sleeve via the rotating shaft, the driven gear is fixed to the rotating shaft, one end of the first connecting shaft passes through the rotating sleeve and is coaxially connected to the driving gear, and the driven gear is meshed with the driving gear.

[0014] A wet dust removal method for iron and steel slag treatment, using the above-mentioned wet dust removal device for iron and steel slag treatment, specifically comprises the following steps: Step 1: Top air film formation: High-pressure gas is introduced into the first air-jet ring. After accumulating in the first accumulation chamber, the high-pressure gas is discharged through the first air-jet hole. When the high-pressure gas is ejected vertically downward from the first air-jet hole, due to the wall effect, the air flow moves downward closely to the inner surface of the tower wall, forming an air film to isolate dust. Step 2: Forming the middle air film: High-pressure gas is introduced into the second jet ring. After the high-pressure gas accumulates in the second accumulation chamber, it is discharged through the second jet hole. The direction of the gas discharged through the second jet hole is inclined to impact the inner wall of the dust removal tower to prevent the airflow from diverging toward the center of the tower, thereby flowing close to the wall to form an air film to isolate dust.

[0015] Beneficial effects of the present invention: By setting up an air film isolation mechanism, an air film is formed on the inner wall of the dust removal tower. The top air film vertically covers the upper part of the tower wall, and the middle air film obliquely covers the middle and lower part of the tower wall. The two layers of air film form an air curtain barrier on the tower wall. When dust enters the tower with the air flow, the air film prevents it from directly contacting the tower wall, avoiding scaling, reducing the cleaning of the dust removal tower, and ensuring the long-term and efficient use of the dust removal tower. By setting up a mixing mechanism, an upward airflow is formed at the bottom of the dust removal tower. This airflow forms a countercurrent with the dust and spray water introduced from the top, generating a vortex tumbling effect in the center of the tower. The upward airflow lifts the fine dust that has not combined with the water droplets, prolonging its residence time in the tower and improving the combination effect of dust and spray water; By setting up a second adjustment mechanism, the nozzle can be adjusted in the horizontal and vertical directions, thereby increasing the turbulence intensity of the dust in the tower and significantly improving the mixing uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a partially cutaway three-dimensional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the main cutaway structure of the present invention; Figure 4 This is a partially cutaway, three-dimensional, enlarged structural diagram of the first air-jet ring of the present invention; Figure 5 This invention Figure 4 Schematic diagram of the enlarged structure of area A in the middle; Figure 6 This is a partially cutaway, three-dimensional, enlarged structural diagram of the second air-jet ring of the present invention; Figure 7 This invention Figure 6 Schematic diagram of the enlarged structure of the middle B area; Figure 8 It is a schematic diagram of a three-dimensional enlarged structure of the mixing mechanism of the present invention; Figure 9 It is a schematic diagram of a three-dimensional enlarged structure of a part of the mixing mechanism of the present invention; Figure 10 This is a partially cutaway, three-dimensional, enlarged structural diagram of the shaft sleeve of the present invention; Figure 11 This is a partially cutaway, three-dimensional, enlarged structural diagram of the nozzle of the present invention; Figure 12 This invention Figure 11 Schematic diagram of the enlarged structure of the middle C area; Figure 13 It is a flow chart of the method of the present invention.

[0018] In the figure: 1, dust removal tower; 2, spray port; 3, dust inlet; 4, air film isolation mechanism; 41, first jet ring; 411, first accumulation chamber; 412, first jet hole; 42, first air pressure control valve; 43, second jet ring; 431, second accumulation chamber; 432, second jet hole; 433, guide groove; 44, second air pressure control valve; 5, mixing mechanism; 51, nozzle; 52, first adjustment mechanism; 521, shaft sleeve; 52 2. First connecting shaft; 523. Second connecting shaft; 524. Spiral groove; 525. First slider; 526. Connecting pipe; 527. Gas collecting pipe; 528. Driving mechanism; 5281. Guide rail; 5282. Second slider; 5283. Rotating ring; 5284. Rotating rod; 5285. Cylinder; 529. Second adjusting mechanism; 5291. Rotating shaft; 5292. Driving gear; 5293. Driven gear; 5294. Rotating sleeve. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1-12 , a wet dust removal device for iron and steel slag treatment, such as Figure 1-Figure 7 As shown, it includes a dust removal tower 1 with a spray port 2 and a dust inlet 3 at the top; an air film isolation mechanism 4 is provided in the dust removal tower 1; the air film isolation mechanism 4 includes: a first jet ring 41 and a second jet ring 43; wherein, the first jet ring 41 is installed on the inner wall of the top of the dust removal tower 1; a first accumulation cavity 411 is provided in the first jet ring 41, and a plurality of first jet holes 412 are provided on the first jet ring 41, and the first jet holes 412 are connected to the first accumulation cavity 411; the outlet of the first jet hole 412 is arranged parallel to the inner wall of the dust removal tower 1, so that when the airflow is discharged through the first jet hole 412, a direction is formed on the inner wall of the dust removal tower 1 An air film flows downward; a second jet ring 43 is installed on the inner wall of the middle part of the dust removal tower 1; a second accumulation chamber 431 is opened in the second jet ring 43, and a plurality of second jet holes 432 are opened on the second jet ring 43, and the second jet holes 432 are connected to the second accumulation chamber 431; the outlet of the second jet hole 432 is inclined to the inner wall of the dust removal tower 1, so that when the airflow is discharged through the second jet hole 432, it forms an oblique downward impact on the inner wall of the dust removal tower 1, and then forms an air film on the inner wall of the dust removal tower 1; a plurality of guide grooves 433 are spaced apart on the second jet ring 43, and are used to allow the airflow to pass close to the second jet ring 43 to form an air film.

[0021] It should be noted that after the high-pressure gas enters the first accumulation chamber 411, it is ejected through the first jet hole 412; since the outlet of the first jet hole 412 is parallel to the inner wall of the dust removal tower 1 (i.e., the airflow direction is vertically downward), according to the wall adhesion effect, the high-speed airflow will flow downward closely to the inner surface of the dust removal tower 1 wall, forming an annular air film; the outlet of the second jet hole 432 is arranged at an angle to the tower wall (e.g., at an angle of 45°), and when the high-pressure gas is ejected, it impacts the tower wall at an oblique downward angle, and the airflow forms a shear force on the tower wall surface. At the same time, the airflow is guided by the guide groove 433 to adhere closely to the surface of the annular body, and finally a middle air film is formed superimposed on the top air film. The top air film covers the upper part of the tower wall vertically downward, and the middle air film covers the middle and lower parts of the tower wall obliquely downward. The two layers of air films form an air curtain barrier on the tower wall. When dust enters the tower with the airflow, the air film blocks its direct contact with the tower wall, avoiding scaling of CaO and MgO by reaction with water; and the air film guides the dust to concentrate in the center area of the tower, creating conditions for subsequent mixing of dust and water, thereby improving the dust removal effect.

[0022] See also Figure 1-Figure 3 The air film isolation mechanism 4 also includes a first air pressure control valve 42 and a second jet ring 43; the first air pressure control valve 42 is installed on the first jet ring 41, and is used to control the air pressure in the first accumulation chamber 411; the second air pressure control valve 44 is installed on the second jet ring 43, and is used to control the air pressure in the second accumulation chamber 431.

[0023] It should be noted that the first air pressure control valve 42 is installed on the first air injection ring 41, and the air pressure in the first accumulation chamber 411 is monitored in real time by a PID controller. A dust concentration sensor connected to the first accumulation chamber 411 can be installed. When the dust concentration sensor detects an increase in the inlet dust concentration, the air pressure is automatically increased to increase the air film flow rate to enhance the isolation effect; conversely, when the concentration decreases, the air pressure is reduced to save energy. Similarly, the second air pressure control valve 44 controls the pressure of the middle air film and forms a gradient pressure field with the top air film, prompting the air film to flow downward along the tower wall and carry out trace dust. It dynamically adjusts the air film pressure according to the dust concentration, maintains the stability of the air film under high load conditions, and avoids the rupture of the air film due to dust impact.

[0024] See also Figure 1-Figure 2 and Figure 8 A mixing mechanism 5 is provided at the bottom of the dust removal tower 1; the mixing mechanism 5 is used to form an airflow toward the top of the dust removal tower 1 to promote the mixing between the dust and the spray water; the mixing mechanism 5 includes a first adjusting mechanism 52 and a plurality of nozzles 51; the plurality of nozzles 51 are provided at the bottom of the dust removal tower 1; the first adjusting mechanism 52 is installed on the dust removal tower 1 and is used to adjust the direction of the nozzle 51.

[0025] It should be noted that the upward spraying of airflow (such as compressed air or circulating water atomized airflow) by the multiple nozzles 51 forms an upward airflow; this airflow forms a countercurrent with the dust introduced from the top, generating a vortex tumbling effect in the center area of the tower; The rising airflow lifts the fine dust that has not combined with the water droplets, prolonging its residence time in the tower. At the same time, it collides repeatedly with the water droplets sprayed from the top in the vortex, causing the dust particle size to increase. Eventually, the dust settles because gravity is greater than the airflow resistance. Improve the mixing efficiency of dust and water, increase the collision frequency of dust and water droplets through vortex tumbling, and achieve particle size screening and separation, so that only particles with gravity greater than the reverse wind force will settle, achieving fine separation and preventing fine dust from escaping.

[0026] See also Figures 8-10 The first adjusting mechanism 52 includes a sleeve 521, a first connecting shaft 522, a second connecting shaft 523, a first slider 525 and a driving mechanism 528; the sleeve 521 is fixed to the dust removal tower 1 along the radial direction of the dust removal tower 1, the first connecting shaft 522 is coaxially inserted into the sleeve 521, the nozzle 51 is rotatably connected to the sleeve 521 around the axis of the first connecting shaft 522, and the nozzle 51 is connected to the first connecting shaft 522, the second connecting shaft 523 is inserted into the sleeve 521, one end of the second connecting shaft 523 is sleeved on the first connecting shaft 522, and a spiral groove 524 is provided on the first connecting shaft 522, the first slider 525 is fixed to the second connecting shaft 523, and the first slider 525 is slidably connected to the spiral groove 524; the driving mechanism 528 is installed on the dust removal tower 1, and the other end of the second connecting shaft 523 is connected to the driving mechanism 528; the driving mechanism 528 is used to drive multiple second connecting shafts 523 to move along their axes.

[0027] It should be noted that the driving mechanism 528 drives the second connecting shaft 523 to move along the axis, and the first slider 525 is embedded in the spiral groove 524 of the first connecting shaft 522. When the second connecting shaft 523 moves, the first slider 525 drives the first connecting shaft 522 to rotate, thereby driving the nozzle 51 to rotate around the axis of the first connecting shaft 522; the upward spray angle of the nozzle 51 is adjusted to prevent the airflow ejected by the nozzle 51 from interfering with the air film; and the direction of the nozzle 51 can be adjusted in real time according to the dust diffusion pattern. For example, when the dust deviates to the left side of the tower body, the nozzle 51 is adjusted to spray airflow to the left to enhance the local vortex intensity and improve the capture efficiency. And when the dust removal work is completed, the nozzle of the nozzle head 51 can be driven to rotate downward to form a downward airflow, which facilitates the discharge of dust particles from the bottom of the dust removal tower 1 and improves the dust extraction efficiency after dust removal.

[0028] See also Figures 8-10The first regulating mechanism 52 also includes an air collecting pipe 527 and a plurality of connecting pipes 526; the air collecting pipe 527 is installed on the dust removal tower 1, and one end of each connecting pipe 526 passes through the axial position of each first connecting shaft 522 and is connected to the nozzle 51, and the other end of the connecting pipe 526 is connected to the air collecting pipe 527; a telescopic airbag is provided on the connecting pipe 526 at a position between the first connecting shaft 522 and the second connecting shaft 523, and is used to prevent interference with the relative movement between the second connecting shaft 523 and the first connecting shaft 522.

[0029] It should be noted that, by using multiple connecting pipes 526 and air collecting pipes 527 in conjunction with each other, the air pressure of the airflow ejected from multiple nozzles 51 is the same, thereby ensuring the stability of the rising airflow; and compensation is made by the telescopic airbag, specifically: the connecting pipe 526 passes through the axis of the first connecting shaft 522, and its telescopic airbag elastically deforms when the first connecting shaft 522 and the second connecting shaft 523 move relative to each other, thereby avoiding pipeline interference and ensuring smooth airflow delivery, that is, delivering compressed air to the nozzle 51.

[0030] See also Figure 1-Figure 3 and Figure 8-Figure 9 , it can be understood that the present application does not limit the specific structure and installation method of the driving mechanism 528. The following only provides a feasible technical solution; the driving mechanism 528 includes a rotating ring 5283, a cylinder 5285, multiple guide rails 5281, a second slider 5282 and a rotating rod 5284; multiple guide rails 5281 are fixed to the dust removal tower 1 along the radial direction of the dust removal tower 1, the second slider 5282 is slidably connected to the guide rail 5281, the rotating ring 5283 is coaxially sleeved on the dust removal tower 1, and each rotating rod 5284 is arranged between the rotating ring 5283 and each second slider 5282; the cylinder 5285 is installed on the dust removal tower 1, and is used to drive the rotating ring 5283 to rotate around its axis to drive the second slider 5282 to move along the length direction of the guide rail 5281.

[0031] It should be noted that the multiple nozzles 51 are driven to move synchronously through the driving mechanism 528 to improve the consistency of movement and achieve precise control; specifically: the rotating ring 5283 is driven to rotate around its axis by the cylinder 5285, so that the rotating rod 5284 pulls or pushes the second slider 5282 to slide on the guide rail 5281, so that the second slider 5282 pushes the second connecting shaft 523 to move, thereby achieving the purpose of driving the nozzle 51 to move, realizing the synchronous driving of multiple nozzles 51 to move, and improving the adjustment efficiency and consistency.

[0032] Example 2: This example differs from Example 1 in that: Figure 11-12The first adjustment mechanism 52 also includes a second adjustment mechanism 529; the second adjustment mechanism 529 is used to adjust the angle of the air flow ejected upward by the nozzle 51; the second adjustment mechanism 529 includes a rotating shaft 5291, a driving gear 5292, a driven gear 5293 and a rotating sleeve 5294; the rotating sleeve 5294 is coaxially inserted into the shaft sleeve 521, and a torsion spring is provided between the rotating sleeve 5294 and the shaft sleeve 521, the nozzle 51 is rotatably connected to the rotating sleeve 5294 through the rotating shaft 5291, the driven gear 5293 is fixed to the rotating shaft 5291, one end of the first connecting shaft 522 passes through the rotating sleeve 5294 and is coaxially connected to the driving gear 5292, and the driven gear 5293 is meshed with the driving gear 5292.

[0033] It should be noted that when the second connecting shaft 523 moves along its axis and drives the first connecting shaft 522 to rotate via the first slider 525, the rotating sleeve 5294 remains stationary due to the restriction of the torsion spring. When the first connecting shaft 522 rotates, it drives the driving gear 5292 to rotate, and the driven gear 5293 engages with the driving gear 5292, thereby driving the rotating shaft 5291 to rotate, causing the spray head 51 to tilt about the axis of the rotating sleeve 5294 to adjust the vertical angle. When the spray head 51 rotates about the rotating shaft 5291 until it contacts the rotating sleeve 5294, the first connecting shaft 522 continues to rotate, driving the spray head 51 and the rotating sleeve 5294 to rotate synchronously, that is, adjusting the upward spray angle of the spray head 51 or driving the spray head 51 to spray air downward. The torsion spring provides a reset force, and when the driving mechanism 528 stops operating, the spray head 51 automatically maintains the set angle. The nozzle 51 can be adjusted in the horizontal and vertical directions to form a spiral upward airflow, increase the turbulence intensity of the dust in the tower, and significantly improve the mixing uniformity; and for coarse dust, the upward inclination angle of the nozzle 51 is increased to increase the upward airflow speed; for fine dust, the angle is reduced to extend the residence time and improve the capture efficiency.

[0034] See also Figures 1-13 A wet dust removal method for treating iron and steel slag, using the above-mentioned wet dust removal device for treating iron and steel slag, specifically comprises the following steps: Step 1: Top air film formation: High-pressure gas is introduced into the first air-jet ring 41. After the high-pressure gas accumulates in the first accumulation chamber 411, it is discharged through the first air-jet hole 412. When the high-pressure gas is ejected vertically downward from the first air-jet hole 412, due to the wall effect, the air flow moves downward closely to the inner surface of the tower wall, forming an air film to isolate dust. Step 2: Forming the middle air film: High-pressure gas is introduced into the second jet ring 43. After the high-pressure gas accumulates in the second accumulation chamber 431, it is discharged through the second jet hole 432. The direction of the gas discharged through the second jet hole 432 is inclined to impact the inner wall of the dust removal tower 1 to prevent the airflow from diverging toward the center of the tower, thereby flowing close to the wall to form an air film to isolate the dust.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction and a specific direction structure and operation, and therefore, cannot be understood as limiting the present invention. In addition, "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A wet dust removal device for treating iron and steel slag, comprising a dust removal tower (1) with a spray port (2) and a dust inlet (3) provided on the top; characterized in that: An air film isolation mechanism (4) is provided in the dust removal tower (1); the air film isolation mechanism (4) comprises: a first jet ring (41), the first jet ring (41) being mounted on the inner wall of the top of the dust removal tower (1); a first accumulation cavity (411) being provided in the first jet ring (41), a plurality of first jet holes (412) being provided on the first jet ring (41), and the first jet holes (412) being in communication with the first accumulation cavity (411); an outlet of the first jet hole (412) being arranged parallel to the inner wall of the dust removal tower (1), so that when the airflow is discharged through the first jet hole (412), an air film flowing downward is formed on the inner wall of the dust removal tower (1); and a second jet ring (43), the second jet ring (43) being mounted on the middle inner wall of the dust removal tower (1); a second accumulation cavity (431) being provided in the second jet ring (43), a plurality of second jet holes (432) being provided on the second jet ring (43), and the second jet holes (432) being communicated with the second accumulation cavity (431); an outlet of the second jet hole (432) being arranged obliquely to the inner wall of the dust removal tower (1), so that when the airflow is discharged through the second jet hole (432), an oblique downward impact is formed on the inner wall of the dust removal tower (1), thereby forming an air film on the inner wall of the dust removal tower (1); a plurality of guide grooves (433) being spaced apart on the second jet ring (43), and being used to allow the airflow to pass closely against the second jet ring (43) to form an air film.

2. A wet dust removal device for iron and steel slag treatment according to claim 1, characterized in that: The air film isolation mechanism (4) further comprises a first air pressure control valve (42) and a second air pressure control valve (44); the first air pressure control valve (42) is mounted on the first jet ring (41) and is used to control the air pressure in the first accumulation chamber (411); the second air pressure control valve (44) is mounted on the second jet ring (43) and is used to control the air pressure in the second accumulation chamber (431).

3. A wet dust removal device for iron and steel slag treatment according to claim 1, characterized in that: A mixing mechanism (5) is provided at the bottom of the dust removal tower (1); the mixing mechanism (5) is used to form an airflow toward the top of the dust removal tower (1) to promote mixing between dust and spray water.

4. A wet dust removal device for iron and steel slag treatment according to claim 3, characterized in that: The mixing mechanism (5) comprises a first adjustment mechanism (52) and a plurality of nozzles (51); the plurality of nozzles (51) are arranged at the bottom of the dust removal tower (1); the first adjustment mechanism (52) is installed on the dust removal tower (1) and is used to adjust the direction of the nozzles (51).

5. A wet dust removal device for iron and steel slag treatment according to claim 4, characterized in that: The first adjusting mechanism (52) comprises a shaft sleeve (521), a first connecting shaft (522), a second connecting shaft (523), a first slider (525) and a driving mechanism (528); the shaft sleeve (521) is fixed to the dust removal tower (1) along the radial direction of the dust removal tower (1); the first connecting shaft (522) is coaxially plugged into the shaft sleeve (521); the nozzle (51) is rotatably connected to the shaft sleeve (521) around the axis of the first connecting shaft (522); the nozzle (51) is connected to the first connecting shaft (522); the second connecting shaft (523) is plugged into the shaft sleeve (521); 521), one end of the second connecting shaft (523) is sleeved on the first connecting shaft (522), a spiral groove (524) is provided on the first connecting shaft (522), the first slider (525) is fixed to the second connecting shaft (523), and the first slider (525) is slidably connected to the spiral groove (524); the driving mechanism (528) is installed on the dust removal tower (1), and the other end of the second connecting shaft (523) is connected to the driving mechanism (528); the driving mechanism (528) is used to drive the plurality of second connecting shafts (523) to move along their axes.

6. A wet dust removal device for iron and steel slag treatment according to claim 5, characterized in that: The first regulating mechanism (52) further includes an air collecting pipe (527) and a plurality of connecting pipes (526); the air collecting pipe (527) is installed on the dust removal tower (1), one end of each connecting pipe (526) passes through the axial position of each first connecting shaft (522) and is connected to the nozzle (51), and the other end of the connecting pipe (526) is connected to the air collecting pipe (527); a telescopic airbag is provided on the connecting pipe (526) at a position between the first connecting shaft (522) and the second connecting shaft (523), and is used to prevent interference with the relative movement between the second connecting shaft (523) and the first connecting shaft (522).

7. The wet dust removal device for iron and steel slag treatment according to claim 5, characterized in that: The driving mechanism (528) comprises a rotating ring (5283), a cylinder (5285), a plurality of guide rails (5281), a second slider (5282) and a rotating rod (5284); the plurality of guide rails (5281) are fixedly arranged on the dust removal tower (1) along the radial direction of the dust removal tower (1); the second slider (5282) is slidably connected to the guide rails (5281); the rotating ring (5283) is coaxially sleeved on the dust removal tower (1), and each of the rotating rods (5284) is arranged between the rotating ring (5283) and each of the second sliders (5282); the cylinder (5285) is installed on the dust removal tower (1) and is used to drive the rotating ring (5283) to rotate around its axis, so as to drive the second slider (5282) to move along the length direction of the guide rails (5281).

8. The wet dust removal device for iron and steel slag treatment according to claim 5, characterized in that: The first regulating mechanism (52) further includes a second regulating mechanism (529); the second regulating mechanism (529) is used to adjust the angle of the airflow ejected upward by the nozzle (51).

9. A wet dust removal device for iron and steel slag treatment according to claim 8, characterized in that: The second adjustment mechanism (529) comprises a rotating shaft (5291), a driving gear (5292), a driven gear (5293) and a rotating sleeve (5294); the rotating sleeve (5294) is coaxially plugged into the shaft sleeve (521), and a torsion spring is provided between the rotating sleeve (5294) and the shaft sleeve (521); the nozzle (51) is rotationally connected to the rotating sleeve (5294) via the rotating shaft (5291); the driven gear (5293) is fixed to the rotating shaft (5291); one end of the first connecting shaft (522) passes through the rotating sleeve (5294) and is coaxially connected to the driving gear (5292), and the driven gear (5293) is meshed with the driving gear (5292).

10. A wet dust removal method for iron and steel slag treatment, characterized by: The wet dust removal device for treating iron and steel slag according to any one of claims 1 to 9 specifically comprises the following steps: Step 1, forming the top air film: high-pressure gas is introduced into the first air-jet ring (41), and after the high-pressure gas is accumulated in the first accumulation chamber (411), it is discharged through the first air-jet hole (412); when the high-pressure gas is ejected from the first air-jet hole (412) in a vertical downward direction, due to the wall adhesion effect, the air flow moves downward closely to the inner surface of the tower wall, forming an air film that isolates dust; Step 2: Forming the middle air film: High-pressure gas is introduced into the second jet ring (43). After the high-pressure gas accumulates in the second accumulation chamber (431), it is discharged through the second jet hole (432). The direction of the gas discharged through the second jet hole (432) is inclined to impact the inner wall of the dust removal tower (1), so as to prevent the air flow from diverging toward the center of the tower, thereby flowing close to the wall to form an air film to isolate dust.

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