A hot-rolled threaded steel smoke removing device

Abstract

The utility model relates to a hot-rolled threaded steel smoke removing device relates to the mist related equipment in the field of steel rolling, including the collection cover who sets up above the smoke generation area, the collection cover is recessed to the smoke generation area and forms the collection area, the filter tower who has the air outlet in the top and has the air inlet in the bottom is arranged above the collection cover, and the air inlet of filter tower is linked with the collection area, and the outside of filter tower is provided with the negative pressure fan who is linked with the air outlet, the steel wire who is used for filtering iron oxide particle is arranged in the filter tower, the utility model discloses simple structure, the cost is lower, and can efficiently, stably remove the water vapor and iron oxide particle mixed smoke that threaded steel generates in the cooling process.

Description

Technical Field

[0001] This utility model relates to defogging equipment in the field of steel rolling, specifically a smoke removal device for hot-rolled threaded steel. Background Technology

[0002] During the rolling process of hot-rolled rebar, especially in the high-pressure water descaling and water cooling stages after finishing rolling, a large amount of fumes composed of water vapor and iron oxide particles are generated. These fumes not only pollute the environment but also seriously endanger the health of on-site operators, thus requiring effective treatment.

[0003] Currently, there are two main methods for dust removal: one is water mist dust suppression, which involves adjusting the concentration of water mist to reach a critical value with the smoke concentration, thereby inhibiting the spread of smoke. However, this critical value is affected by various factors such as climate and ambient temperature, making it difficult to control precisely. In actual operation, the effect is unstable and the adaptability is poor.

[0004] Secondly, a negative pressure suction combined with a cyclone separator is used to extract the smoke and separate solid particles such as iron oxide before discharging it. Although this method can effectively remove solid particles, the amount of smoke generated during hot rolling is not particularly large. Using a cyclone separator not only requires additional equipment investment, but also suffers from high energy consumption and poor economic efficiency during continuous operation. Utility Model Content

[0005] The purpose of this invention is to provide a smoke removal device for hot-rolled rebar. This device has a simple structure, low cost, and can efficiently and stably remove the mixed smoke of water vapor and iron oxide particles generated during the cooling process of rebar.

[0006] To achieve the above objectives, the specific solution adopted by this utility model is as follows: a smoke removal device for hot-rolled threaded steel, comprising a collection hood disposed above the smoke generation area, the collection hood being recessed into the smoke generation area to form a collection zone, a filter tower having an air outlet at the top and an air inlet at the bottom disposed above the collection hood, the air inlet of the filter tower being connected to the collection zone, a negative pressure fan being disposed outside the filter tower and connected to the air outlet; and steel wires for filtering iron oxide particles being disposed inside the filter tower.

[0007] As an optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: a straight pipe is fixedly connected to the collection hood below the filter tower, one end of the straight pipe is connected to the air inlet, and the other end of the straight pipe is connected to the collection area.

[0008] As another optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: the filter tower is provided with a first chamber, a second chamber and a third chamber in sequence from top to bottom along its height direction, and the steel wire is filled in the first chamber and the third chamber; the second chamber is provided with a water spray ring, and the water spray ring is provided with multiple water spray holes, and the water sprayed from the water spray holes flows out from the air inlet of the filter tower.

[0009] As another optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: the filter tower is fixedly provided with a first wall plate and a second wall plate, which divides the inner cavity of the filter tower into the first chamber, the second chamber and the third chamber; the first wall plate and the second wall plate are each provided with a plurality of air holes for gas to pass through.

[0010] As another optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: the volume of the third chamber is 3-10 times that of the second chamber; the volume of the first chamber is 2-5 times that of the second chamber.

[0011] As another optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: a first opening is provided on the outer side wall of the first chamber, and a first plug is provided in the first opening.

[0012] As another optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: the outer side wall of the third chamber is provided with a second opening, and a second plug is provided in the second opening.

[0013] As another optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: the water spray ring is an elastic hollow ring made of rubber.

[0014] As another optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: a guide pipe is provided below the filter tower. One end of the guide pipe is connected to the air inlet, and the other end of the guide pipe passes through the collection hood and extends into the collection area, and is bent to form a bend. The end of the bend away from the guide pipe passes through the collection hood and extends out of the collection area. Multiple air inlets are provided on the guide pipe.

[0015] As another optimized solution for the above-mentioned hot-rolled threaded steel smoke removal device: the air inlet is located above the connection between the guide pipe and the bending part.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1) This utility model includes a collection hood set above the smoke generation area, a filter tower with steel wires inside, and a negative pressure fan connected to the air outlet at the top of the filter tower. The air inlet of the filter tower is connected to the collection area of ​​the collection hood. The negative pressure fan draws the mixed smoke containing iron oxide particles from the collection hood into the filter tower. The filter tower can effectively intercept and collect the mixed smoke, causing the particulate matter to settle in the cavity, thereby removing impurities.

[0017] 2) The water spray rings installed in the second chamber spray upwards and downwards. On the one hand, they wash the rising mixed smoke, capturing iron oxide particles and mixing them into the water flow; on the other hand, the downward-flowing water effectively washes away and removes iron oxide impurities adhering to the steel wire. Finally, the wastewater containing impurities is discharged uniformly through the bottom guide pipe, achieving effective collection and removal of impurities.

[0018] 3) The first chamber and the third chamber are respectively provided with a first opening and a second opening, which facilitates the periodic replacement of the steel wire, thereby ensuring that the device can operate stably for a long time. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of Example 1. Figure 2 This is a structural schematic diagram of Example 2. Figure 3 This is a partially enlarged view of the filter tower in Example 2. Figure 4 This is a partially enlarged view of the guide tube in Example 2. Reference numerals: 1. Collection hood; 101. Collection area; 2. Filter tower; 201. First chamber; 202. Second chamber; 203. Third chamber; 204. Fourth chamber; 211. First wall panel; 212. Second wall panel; 213. Third wall panel; 221. First plug; 222. Second plug; 231. Air outlet; 232. Air inlet; 3. Negative pressure fan; 4. Steel wire; 5. Water spray ring; 501. Water spray hole; 6. Straight pipe; 601. Air inlet; 602. Bend; 7. Guide pipe; 8. Connecting pipe; 9. Steel; 10. Nozzle. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art, such as the structure of negative pressure fans.

[0021] Example 1 Please see Figure 1 A smoke removal device for hot-rolled threaded steel includes a collection hood 1 disposed above the smoke-generating area. In this embodiment, the collection hood 1 is located directly above the cooling nozzle 10. The collection hood 1 has an arc-shaped plate structure, and the collection hood 1 is concave towards the smoke-generating area to form a collection area 101.

[0022] A filter tower 2 is installed above the collection hood 1. The main body of the filter tower 2 is a cylindrical structure with a conical bottom. An air outlet 231 is opened at the top of the filter tower 2, and an air inlet 232 is opened at the bottom of the filter tower 2. The air inlet 232 of the filter tower 2 is connected to the collection area 101 through a straight pipe 6. The top end of the straight pipe 6 passes through the air inlet 232 and is welded to the air inlet 232, and the bottom end of the straight pipe 6 passes through the collection hood 1 and is welded to the collection hood 1.

[0023] A negative pressure fan 3 is installed on the outside of the filter tower 2 and is connected to the air outlet 231. The filter tower 2 and the negative pressure fan 3 are connected by a connecting pipe 8. One end of the connecting pipe 8 passes through the air outlet 231 and is welded to the air outlet 231, and the other end of the connecting pipe 8 is connected to the negative pressure fan 3.

[0024] The filter tower 2 is filled with steel wires 4 for filtering iron oxide particles, with irregular gaps between the wires 4. Under negative pressure, the iron oxide particles in the rising mixed smoke are trapped and adhere to the surface of the steel wires 4. To facilitate the installation and replacement of the steel wires 4, one or more openings are provided on the outer wall of the filter tower 2, each opening being equipped with a matching plug. In this embodiment, one opening is provided on the outer wall of the filter tower 2.

[0025] Working principle of Example 1: At the water cooling station of hot-rolled threaded steel, a large amount of mixed smoke rich in iron oxide particles is generated on the surface of the high-temperature steel 9. After the device is started, the negative pressure fan 3 operates, forming a negative pressure gradient from top to bottom inside the filter tower 2. This suction is transmitted through the connecting pipe 8, the air outlet 231 of the filter tower 2, and finally through the air inlet 232 at the bottom of the filter tower 2 and the straight pipe 6 to the collection area 101 of the collection hood 1.

[0026] Under this negative pressure, the mixed smoke above the steel 9 is effectively drawn into the collection area 101 and guided upwards along the straight pipe 6 to the bottom of the filter tower 2. The filter tower 2 is filled with a large number of steel wires 4, which intertwine to form tortuous, fine, irregular channels. When the mixed smoke passes through this steel wire 4 filter layer, the airflow path is complex and variable. The iron oxide particles carried in the smoke are efficiently intercepted and attached to the surface of the steel wires 4 by physical mechanisms such as inertial collision and direct interception.

[0027] At this point, the solid particles in the smoke have been successfully separated. The purified gas continues to rise and is eventually drawn out by the negative pressure fan 3 through the outlet 231 at the top of the filter tower 2 and discharged into the atmosphere. The entire process achieves continuous collection, filtration, and purification of smoke, with a simple structure and stable and reliable operation.

[0028] Example 2 Please see Figure 2 , Figure 3 , Figure 4A smoke removal device for hot-rolled threaded steel includes a collection hood 1 disposed above the smoke-generating area. In this embodiment, the collection hood 1 is located directly above the cooling nozzle 10. The collection hood 1 has an arc-shaped plate structure, and the collection hood 1 is concave towards the smoke-generating area to form a collection area 101.

[0029] A filter tower 2 is installed above the collection hood 1. The filter tower 2 has a cylindrical body and a conical bottom. An air outlet 231 is located at the top of the filter tower 2, and an air inlet 232 is located at the bottom. The air inlet 232 of the filter tower 2 is connected to the collection area 101. A negative pressure fan 3 is installed outside the filter tower 2 and is connected to the air outlet 231. The filter tower 2 and the negative pressure fan 3 are connected by a connecting pipe 8. One end of the connecting pipe 8 passes through the air outlet 231 and is welded to it; the other end of the connecting pipe 8 is connected to the negative pressure fan 3.

[0030] A first wall plate 211, a second wall plate 212, and a third wall plate 213 are welded to the inner wall of the filter tower 2 from top to bottom along its height. The third wall plate 213 is located at the junction of the cylindrical body and the conical bottom of the filter tower 2. The first wall plate 211, the second wall plate 212, and the third wall plate 213 are all circular plate structures with radii equal to the inner diameter of the filter tower 2. Each of the first wall plate 211, the second wall plate 212, and the third wall plate 213 has multiple vents for gas passage, with the number of vents ranging from 5 to 20. In this embodiment, the number of vents is 15.

[0031] The first wall panel 211, the second wall panel 212, and the third wall panel 213 divide the internal space of the filter tower 2 from top to bottom into a first chamber 201, a second chamber 202, a third chamber 203, and a fourth chamber 204 at the bottom. The volume of the third chamber 203 is 3 to 10 times that of the second chamber 202; the volume of the first chamber 201 is 2 to 5 times that of the second chamber 202.

[0032] The first chamber 201 and the third chamber 203 are filled with steel wires 4 for filtering iron oxide particles, with irregular gaps between the wires 4. When the mixed smoke passes upward due to negative pressure, the iron oxide particles in the smoke are trapped and adhere to the steel wires 4. For ease of maintenance, the outer walls of the first chamber 201 and the third chamber 203 are respectively provided with a first opening and a second opening, and are equipped with corresponding first plug 221 and second plug 222 for the installation and replacement of the steel wires 4.

[0033] The second chamber 202 is equipped with a water spray ring 5 fixed to the inner wall of the filter tower 2. The water spray ring 5 is an elastic hollow ring made of rubber, and multiple water spray holes 501 are opened on the water spray ring 5. The water sprayed from the water spray holes 501 is directed towards the first chamber 201 and the third chamber 203. The water sprayed from the water spray holes 501 washes the rising mixed smoke, capturing iron oxide particles and mixing them into the water flow; on the other hand, the water flows downward, effectively flushing away and carrying away iron oxide impurities attached to the steel wire 4. Finally, the wastewater containing impurities flows out through the air inlet 232 at the bottom of the filter tower 2.

[0034] A guide pipe 7 is installed below the filter tower 2. One end of the guide pipe 7 is connected to the air inlet 232, and the other end of the guide pipe 7 passes through the collection cover 1 and extends into the collection area 101, where it is bent to form a bend 602. The outer wall of the guide pipe 7 is welded to the collection cover 1, and the angle formed by the bend of the guide pipe 7 is 100°~160°. The end of the bend 602 facing away from the guide pipe 7 extends out of the collection area 101 through the collection cover 1. In this embodiment, the outer wall of the bend 602 is welded to the collection cover 1. The water sprayed from the spray hole 501 flows into the guide pipe 7 through the air inlet 232 of the filter tower 2 and is finally discharged from the bend 602.

[0035] Multiple air inlets 601 are provided on the wall of the guide pipe 7, and these air inlets 601 are located above the connection between the guide pipe 7 and the bend 602. The function of the air inlets 601 is to allow the mixed smoke to pass through. The number of air inlets 601 is 10 to 20. In this embodiment, 15 air inlets 601 are provided.

[0036] Working principle of Example 2: The entire device operates under the drive of the negative pressure fan 3, which creates a stable negative pressure gradient inside the filter tower 2. This negative pressure is transmitted through the connecting pipe 8 and the air outlet 231 of the filter tower 2, and finally to the guide pipe 7 and the collection area 101 at the bottom of the filter tower 2. This allows the mixed smoke above the hot-rolled threaded steel to be efficiently drawn into the air inlet 601 on the wall of the guide pipe 7 and introduced into the filter tower 2, thus achieving active and centralized collection of smoke.

[0037] After entering filter tower 2, the mixed smoke undergoes three stages of deep purification. First, in the larger third chamber 203, the smoke passes through the steel wire 4 filter layer, where most of the iron oxide particles are inertially trapped and adsorbed, completing the primary filtration. Next, the airflow rises to the second chamber 202, where it is sprayed by the water spray ring 5. The water jets from the spray holes 501 wash the rising mixed smoke, capturing the iron oxide particles and mixing them into the water flow; simultaneously, the downward flow of water effectively washes away and removes iron oxide impurities adhering to the steel wire 4. Finally, the gas enters the first chamber 201 and undergoes final fine filtration through the last steel wire 4 filter layer, ensuring thorough purification.

[0038] After purification, the clean gas, mainly composed of water vapor and air, continues to rise and is eventually discharged into the atmosphere through the air outlet 231 at the top of the filter tower 2 via the negative pressure fan 3. Simultaneously, the sprayed water, carrying iron oxide impurities captured from various stages, flows down the wall of the filter tower 2 under gravity and converges into the guide pipe 7 at the bottom of the filter tower 2. Wastewater containing impurities is then directed out through the bend 602 at the end of the guide pipe 7 to the outside of the collection area 101.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A smoke removal device for hot-rolled threaded steel bars, characterized in that: The system includes a collection hood (1) set above the smoke generation area, the collection hood (1) being recessed into the smoke generation area to form a collection area (101), a filter tower (2) with an air outlet (231) at the top and an air inlet (232) at the bottom is set above the collection hood (1), and the air inlet (232) of the filter tower (2) is connected to the collection area (101), and a negative pressure fan (3) connected to the air outlet (231) is set outside the filter tower (2); and a steel wire (4) for filtering iron oxide particles is set inside the filter tower (2).

2. The smoke removal device for hot-rolled threaded steel as described in claim 1, characterized in that: Below the filter tower (2) is a straight pipe (6) that is fixedly connected to the collection hood (1). One end of the straight pipe (6) is connected to the air inlet (232), and the other end of the straight pipe (6) is connected to the collection area (101).

3. The smoke removal device for hot-rolled threaded steel as described in claim 1, characterized in that: The filter tower (2) is provided with a first chamber (201), a second chamber (202) and a third chamber (203) arranged sequentially from top to bottom along its height direction. The steel wire (4) is filled in the first chamber (201) and the third chamber (203). The second chamber (202) is provided with a water spray ring (5). The water spray ring (5) has multiple water spray holes (501). The water sprayed from the water spray holes (501) flows out from the air inlet (232) of the filter tower (2).

4. The smoke removal device for hot-rolled threaded steel as described in claim 3, characterized in that: The filter tower (2) is fixedly provided with a first wall plate (211) and a second wall plate (212), which divide the inner cavity of the filter tower (2) into the first chamber (201), the second chamber (202) and the third chamber (203); the first wall plate (211) and the second wall plate (212) are provided with multiple air holes for gas to pass through.

5. The smoke removal device for hot-rolled threaded steel as described in claim 3, characterized in that: The volume of the third chamber (203) is 3-10 times that of the second chamber (202); the volume of the first chamber (201) is 2-5 times that of the second chamber (202).

6. The smoke removal device for hot-rolled threaded steel as described in claim 3, characterized in that: The outer wall of the first chamber (201) is provided with a first opening, and a first plug (221) is provided in the first opening.

7. The smoke removal device for hot-rolled threaded steel as described in claim 3, characterized in that: The outer wall of the third chamber (203) is provided with a second opening, and a second plug (222) is provided in the second opening.

8. The smoke removal device for hot-rolled threaded steel as described in claim 3, characterized in that: The water spray ring (5) is an elastic hollow ring made of rubber.

9. The smoke removal device for hot-rolled threaded steel as described in claim 3, characterized in that: The filter tower (2) is provided with a guide pipe (7) at the bottom. One end of the guide pipe (7) is connected to the air inlet (232). The other end of the guide pipe (7) passes through the collection cover (1) and extends into the collection area (101), and is bent to form a bend (602). The end of the bend (602) away from the guide pipe (7) passes through the collection cover (1) and extends out of the collection area (101). Multiple air inlets (601) are provided on the guide pipe (7).

10. The smoke removal device for hot-rolled threaded steel as described in claim 9, characterized in that: The air inlet (601) is located above the connection between the guide pipe (7) and the bend (602).

Images