Pretreatment dust collection device and rolling mill
By installing a pretreatment and dust collection device on the rolling mill, using the combination of spiral air guide structure and water spray pipe, the problem of insufficient capture capacity of large particles of dust by existing dust removal methods is solved, and efficient dust treatment and defog effect is achieved.
Patent Information
- Application Number
- CN202421886295.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-05
AI Technical Summary
The existing water mist suppression and dust removal methods lack the ability to capture large-particle oxidized dust, resulting in smoke and dust overflow and drift.
A pretreatment dust collection device is designed, including a sleeve, a spiral air guide structure and a water jet pipe. The lower end of the sleeve connects the dust collecting port of the guide, and a fan is installed at the upper end; the spiral air guide structure causes the flue gas to spiral; the water spray pipe sprays out water mist, which combines with the rotating flue gas to form a water film and capture smoke and dust.
Through the combination of spiral air guide structure and water spray pipe, smoke and dust are effectively captured and purified under the action of the water film, the dust concentration is greatly reduced, the defog effect is significant, and the purification efficiency can reach 80%.
Smart Images
Figure CN222854997U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dust removal of rolling mills, in particular to a pre-treatment dust collecting device and a rolling mill. Background Art
[0002] The main point of generation of rolling mill dust is at the entrance and exit of the rolling mill. Rolling dust is scattered from the exit of the rolling mill to the surrounding areas due to factors such as rolling crushing, high-temperature quenching crushing, high-temperature water vaporization, and high-speed movement of rolled materials. At the same time, the dust contains a large amount of steam vaporized by cooling water. The existing method generally uses cooling water mist suppression, but the water mist suppression dust removal has insufficient capture capacity for large particles of oxidized dust, causing a large amount of smoke and dust with a certain pressure to overflow and float in the air. Utility Model Content
[0003] Based on the above description, the utility model provides a pre-treatment dust collecting device to solve the problem that the existing dust removal means are not effective.
[0004] The technical solution of the utility model to solve the above technical problems is as follows:
[0005] A pre-treatment dust collecting device, comprising:
[0006] A sleeve extends in the up-down direction, the lower end of the sleeve is used to communicate with the dust collecting port of the guide, and the upper end of the sleeve is used to install a fan;
[0007] A spiral air guide structure is arranged in the sleeve so that the smoke in the sleeve moves in a spiral shape; and
[0008] The water spray pipe comprises a pipe body and a nozzle. The pipe body extends in the up-down direction and is installed in the sleeve. The water spray pipe is provided with a water spray port, and the nozzle is installed at the water spray port.
[0009] On the basis of the above technical solution, the present invention can also be improved as follows:
[0010] Furthermore, the spiral air guide structure is configured as a spiral blade, and the spiral blade surrounds the periphery of the water spray pipe.
[0011] Furthermore, the inclination angle of the spiral blade is A, 40°≤A≤44°.
[0012] Furthermore, the pre-treatment dust collecting device also includes a positioning ring, which is installed in the middle of the sleeve, and the inner ring of the positioning ring abuts against the spiral blade.
[0013] Furthermore, the upper end of the sleeve is provided with two mounting holes which are relatively distributed;
[0014] The water spray pipe also includes a mounting pipe, the two ends of which are respectively inserted into the two mounting holes, and the ends of the mounting pipe are used for water inlet;
[0015] The upper end of the tube body is connected to the middle part of the installation tube.
[0016] Furthermore, the nozzle is configured as a spiral centrifugal nozzle.
[0017] Furthermore, the sleeve comprises:
[0018] A cylinder body extending up and down and arranged in a columnar shape; and
[0019] An air collecting hood having an inner cavity, a hood opening and an air inlet connected to the inner cavity, wherein the hood opening is used to cover the dust collecting opening arranged on the guide, and the air inlet is connected to the lower end of the cylinder;
[0020] The spiral air guide structure and the water spray pipe are both arranged in the cylinder.
[0021] The utility model also provides a rolling mill, comprising:
[0022] A guide, having a dust collecting port; and,
[0023] A pre-treatment dust collecting device, the pre-treatment dust collecting device is as described above, the pre-treatment dust collecting device is installed on the guide and is connected to the dust collecting port.
[0024] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0025] The lower end of the sleeve is used to connect to the dust collecting port of the guide, and a fan is installed at the upper end of the sleeve so that the smoke flows from bottom to top. The spiral air guide structure allows the smoke to spirally move in the sleeve. The nozzle sprays water toward the sleeve, generating droplet liquid particles in the sleeve, and under the influence of the rotating smoke, a uniform water film is formed on the inner wall of the sleeve, the water film includes a liquid film layer attached to the inner wall of the sleeve and a water film layer connected to the side of the liquid film layer away from the inner wall of the sleeve. The smoke enters from the lower end of the sleeve, collides with the droplet liquid particles and condenses into large dust particles, and then moves to the inner wall of the sleeve due to the action of the rotating smoke, and is captured after contacting the water film layer. The captured large dust particles continue to move centrifugally due to the density difference between themselves and the water film layer, and are annihilated after contacting the liquid film layer rotating at a high speed on the inner wall of the sleeve. Thereby, the dust concentration of the flue gas generated by the rolling mill can be greatly reduced while the temperature is reduced, and the demisting requirements are met, and the dust-containing flue gas discharged from the dust collecting port can be preliminarily purified, which is efficient and practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1A schematic diagram of the structure of a pre-treatment dust collecting device provided in an embodiment of the utility model;
[0027] Figure 2 for Figure 1 A structural diagram from another perspective;
[0028] Figure 3 for Figure 1 A structural schematic diagram from another perspective;
[0029] Figure 4 A schematic top view of a pre-treatment dust collecting device provided in an embodiment of the utility model;
[0030] Figure 5 A schematic diagram of the use status of a pre-treatment dust collecting device provided in an embodiment of the utility model.
[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0032] 1. Sleeve; 11. Cylinder body; 111. Mounting hole; 12. Air collecting hood; 121. Hood opening; 122. Dust collecting opening; 123. Air guide cavity wall; 2. Spiral air guide structure; 21. Spiral blades; 3. Water spray pipe; 31. Pipe body; 32. Nozzle; 33. Mounting pipe; 4. Positioning ring; a. Guide; b. Fan. DETAILED DESCRIPTION
[0033] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0035] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.
[0036] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.
[0037] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.
[0038] Reference Figure 1 , Figure 2 and Figure 5 The utility model provides a pre-treatment dust collecting device, comprising:
[0039] The sleeve 1 extends in the up-down direction, the lower end of the sleeve 1 is used to communicate with the dust collecting port of the guide a, and the upper end of the sleeve 1 is equipped with a fan b;
[0040] A spiral air guide structure 2 is provided in the sleeve 1 so that the smoke in the sleeve 1 moves in a spiral manner; and
[0041] The water spray pipe 3 comprises a pipe body 31 and a nozzle 32. The pipe body 31 extends in the up-down direction and is installed in the sleeve 1. The water spray pipe 3 is provided with a water spray port, and the nozzle 32 is installed at the water spray port.
[0042] In this embodiment, fan b is installed at the upper end of the sleeve 1. Fan b generates negative pressure, so that smoke containing a large amount of steam passes through the sleeve 1 from bottom to top from the dust collecting port of the guide a. The spiral air guide structure 2 changes the smoke from linear motion to high-speed rotational motion.
[0043] The nozzle 32 sprays high-speed water mist toward the sleeve 1, and the sprayed water mist flow and the oncoming high-speed dust airflow are sprayed together to condense into large particles. The large particles will move toward the inner wall of the sleeve 1 due to the action of the rotating airflow. And the large amount of water mist sprayed by the nozzle 32 forms a uniform water film on the inner wall surface of the sleeve 1 due to the action of the rotating airflow. The water film includes a liquid film layer and a water film layer. The liquid film layer adheres to the inner wall of the sleeve 1 and rotates at a high speed with the inner wall of the sleeve 1. The water film layer is connected to the side of the liquid film layer away from the inner wall of the sleeve 1. The flue gas containing large particles is fully in contact with the water film layer under the double action of the rotating airflow and the water mist flow, so that it is captured by the water film layer and enters the water film layer. The captured large particles of dust continue to make centrifugal motion and gradually approach the inner wall of the sleeve 1, and are annihilated with the liquid film layer at the moment of contact, thereby achieving deep dust removal and demisting of the flue gas. The combination of spray dust removal and cyclone dust removal can achieve high dust treatment efficiency, with a purification efficiency of about 80%. The entire operating resistance is ≤350Pa, meeting environmental emission requirements.
[0044] It should be noted that condensation refers to the collision of tiny mist droplets and dust particles in the flue gas in the high-speed airflow to form larger particles; capture refers to the condensation of mist droplets and dust particles into large particles, which are fully in contact with the water film layer due to the action of the airflow and are captured by the liquid and enter the water film layer; annihilation refers to the high-speed rotation of mist droplets and dust solid particles with the flue gas, and the centrifugal separation is achieved by utilizing the density difference between the particles and the water film layer, and they are thrown onto the inner wall surface of the sleeve 1.
[0045] Specifically, in this embodiment, refer to Figures 1 to 3 The spiral air guide structure 2 is configured as a spiral blade 21, and the spiral blade 21 surrounds the periphery of the water spray pipe 3. In this embodiment, the spiral blade 21 is a thin sheet-like spiral component with a smooth surface, which is evenly distributed in the sleeve 1 at a certain inclination angle, so as to change the movement direction of the smoke flow, provide a dynamic environment, and have a stable and strong structure.
[0046] In another embodiment, the spiral air guide structure 2 can also be composed of a plurality of air guide plates, and the plurality of air guide plates are installed at intervals on the water spray pipe 3, one end of each of the air guide plates is connected to the water spray pipe 3, and the other end extends obliquely upward close to the inner wall of the sleeve 1, thereby being able to change the movement direction of the smoke flow.
[0047] More specifically, the inclination angle of the spiral blade 21 is A, 40°≤A≤44°, and in this embodiment, A=42°.
[0048] It should be noted that the number of spiral turns, the inclination angle and the coverage area of the spiral blade 21 can be adjusted according to the processing requirements. The inclination angle of the spiral blade 21 is related to the flue gas flow velocity and the dust removal and demisting efficiency in the sleeve 1. And when the smoke dust content of the flue gas from the lower end of the sleeve 1 is greater, the number of turns of the spiral blade 21 is greater, and the inclination angle of the spiral blade 21 is greater.
[0049] In order to fix the spiral blade 21, in this embodiment, continue to refer to Figures 1 to 3 The pre-treatment dust collecting device further includes a positioning ring 4, which is installed in the middle of the sleeve 1, and the inner ring of the positioning ring 4 abuts against the spiral blade 21. The positioning ring 4 is arranged in the gap between the spiral blade 21 and the inner wall of the sleeve 1, the outer ring of the positioning ring 4 is fixed to the inner wall of the sleeve 1, and the inner ring of the positioning ring 4 abuts against the spiral blade 21, so that the spiral blade 21 can be fixed and the spiral blade 21 is kept concentric with the sleeve 1. In this way, the stability of the spiral blade 21 when changing the flue gas flow is improved, and the dust removal and demisting effect is guaranteed.
[0050] In the present invention, the number of the positioning rings 4 is not limited, as long as they can play a positioning role and make the spiral blade 21 concentric with the sleeve 1. In this embodiment, two positioning rings 4 are provided, and the two positioning rings 4 are spaced apart in the vertical direction.
[0051] In order to install the water spray pipe 3 on the sleeve 1, in this embodiment, refer to Figure 2 , Figure 4 and Figure 5 The upper end of the sleeve 1 is provided with two relatively distributed mounting holes 111; the water spray pipe 3 also includes a mounting pipe 33, the two ends of which are respectively inserted into the two mounting holes 111, and the ends of the mounting pipe 33 are used for water inlet; the upper end of the pipe body 31 is connected to the middle of the mounting pipe 33. The pipe body 31 is first inserted into the sleeve 1, and then the two ends of the mounting pipe 33 are respectively inserted into the two mounting holes 111, so that the pipe body 31 can be fixedly installed in the sleeve 1, and the end of the mounting pipe 33 is located outside the sleeve 1, which is convenient for water inlet.
[0052] In this embodiment, the nozzle 32 is configured as a spiral centrifugal nozzle 32. The spiral centrifugal nozzle 32 can spray conical water mist, and the spiral centrifugal nozzle 32 is connected to the tube body 31 to adjust its orientation angle, so that the direction of the water mist flow collides head-on with the flue gas flow, increasing the probability of collision between the droplet liquid particles and the dust particles, and improving the dust removal and demisting efficiency.
[0053] It should be noted that there is no limit on the number of the nozzles 32. In this embodiment, the water spray ports are arranged in a plurality, and the plurality of water spray ports are spaced apart in the vertical direction, and the directions of two adjacent water spray ports are staggered, so that the directions of the nozzles 32 are different, so that each nozzle 32 can spray water mist directly toward the flue gas flow, so as to promote the collision between the droplet liquid particles and the dust particles to condense into large particles, thereby improving the dust removal and demisting efficiency.
[0054] Specifically, the sleeve 1 includes a cylinder body 11 and an air collecting hood 12, the cylinder body 11 extends up and down and is arranged in a columnar shape; the air collecting hood 12 has an inner cavity and a hood opening 121 and an air inlet connected to the inner cavity, the hood opening 121 is used to cover the dust collecting port 122 arranged on the guide a, and the air inlet is connected to the lower end of the cylinder body 11; the spiral air guide structure 2 and the water spray pipe 3 are both arranged in the cylinder body 11.
[0055] In this embodiment, refer to Figure 1 and Figure 3 The dust collecting port 122 of the guide a faces the horizontal direction. The cover port 121 of the air collecting hood 12 faces the horizontal direction and is covered on the dust collecting port 122 of the dust guide; the air inlet of the air collecting hood 12 faces upward and is connected with the lower end of the cylinder 11, and the inner cavity of the air collecting hood 12 includes an air guiding cavity wall 123 located between the air inlet and the cover port 121, and the air guiding cavity wall 123 is arranged obliquely upward to change the direction of the smoke and dust flow entering from the cover port 121 in the horizontal direction into a smoke and dust flow in the up-down direction, and then flow into the sleeve 1 from the air inlet.
[0056] In addition, the cylinder 11 is a circular cylinder with a smooth and flat inner wall. The diameter and height of the cylinder 11 are related to the volume of saturated flue gas containing a large number of droplets, the efficiency requirements of dust removal and demisting, the total amount of droplets, the droplet particle size distribution, the particle size and characteristics of the dust, and are not limited here.
[0057] Reference Figure 5 The utility model also provides a rolling mill, including a guide guard a and a pre-treatment dust collecting device, wherein the guide guard a has a dust collecting port; the pre-treatment dust collecting device is installed on the guide guard a and communicated with the dust collecting port. The pre-treatment dust collecting device is as described above, and the rolling mill includes all the technical features of the pre-treatment dust collecting device, which will not be described in detail here.
[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A pre-treatment dust collecting device, characterized in that: include: A sleeve extends in the up-down direction, the lower end of the sleeve is used to communicate with the dust collecting port of the guide, and the upper end of the sleeve is used to install a fan; A spiral air guide structure is arranged in the sleeve so that the smoke in the sleeve moves in a spiral shape; and The water spray pipe comprises a pipe body and a nozzle. The pipe body extends in the up-down direction and is installed in the sleeve. The water spray pipe is provided with a water spray port, and the nozzle is installed at the water spray port.
2. The pre-treatment dust collecting device according to claim 1, characterized in that: The spiral air guide structure is configured as a spiral blade, and the spiral blade surrounds the periphery of the water spray pipe.
3. The pre-treatment dust collecting device according to claim 2, characterized in that: The inclination angle of the spiral blade is A, 40°≤A≤44°.
4. The pre-treatment dust collecting device according to claim 2, characterized in that: The pre-treatment dust collecting device also includes a positioning ring, which is installed in the middle of the sleeve, and the inner ring of the positioning ring is in contact with the spiral blade.
5. The pre-treatment dust collecting device according to claim 2, characterized in that: The upper end of the sleeve is provided with two mounting holes which are relatively distributed; The water spray pipe also includes a mounting pipe, the two ends of which are respectively inserted into the two mounting holes, and the ends of the mounting pipe are used for water inlet; The upper end of the tube body is connected to the middle part of the installation tube.
6. The pre-treatment dust collecting device according to claim 1, characterized in that: The nozzle is configured as a spiral centrifugal nozzle.
7. The pre-treatment dust collecting device according to claim 1, characterized in that: The sleeve comprises: A cylinder body extending up and down and arranged in a columnar shape; and An air collecting hood having an inner cavity, a hood opening and an air inlet connected to the inner cavity, wherein the hood opening is used to cover the dust collecting opening arranged on the guide, and the air inlet is connected to the lower end of the cylinder; The spiral air guide structure and the water spray pipe are both arranged in the cylinder.
8. A rolling mill, characterized in that: include: A guide, having a dust collecting port; and, The pre-treatment dust collecting device according to any one of claims 1 to 7, wherein the pre-treatment dust collecting device is installed on the guide and is connected to the dust collecting port.