Hot-rolled steel billet surface dephosphorization device
By combining the high-pressure injection device and the steam collection system, the high-temperature steam generated during the rolling process is used to mix with the high-pressure gas to form a high-speed jet stream to remove the iron oxide sheet, which solves the problems of high water resource consumption and production costs in the prior art, and achieves energy saving and emission reduction and improves phosphorus removal effects.
Patent Information
- Application Number
- CN202422260565.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The existing high-pressure water descaling methods consume a large amount of water resources, increasing production costs, and making it difficult to reduce energy consumption and production costs.
A high-pressure injection device is used to combine steam collection and transportation, and the high-temperature steam generated during billet rolling is mixed with high-pressure gas to form a high-speed jet stream to remove the iron oxide sheet.
By recycling steam and mixing it with high-pressure gas, the phosphorus removal effect is improved, energy consumption is saved, and production costs are reduced.
Smart Images
Figure CN223028131U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of billet descaling, and particularly relates to a surface descaling device for hot-rolled billets. Background Art
[0002] Steel is oxidized at high temperature to form a dense scale (phosphorus scale) on its surface. If this scale cannot be removed before rolling, it will be pressed into the surface of the strip by the roll during the rolling process, affecting its surface quality. The remaining scale will also accelerate the wear of the roll and reduce the service life of the roll. Therefore, before billet rolling, the scale on the surface must be removed. Currently, high-pressure water descaling is one of the most commonly used methods, and its principle is to use the kinetic energy of high-pressure water to impact and remove the scale on the billet surface. However, this method consumes a large amount of water resources and increases production costs. Summary of the Utility Model
[0003] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is: how to provide a surface descaling device for hot-rolled billets that reduces energy consumption and production costs.
[0004] To solve the above technical problem, the technical solution adopted by the utility model is:
[0005] A surface descaling device for hot-rolled billets includes a high-pressure spraying device and a steam collection hood erected above a billet conveying roller table. A spraying device for spraying water onto the hot-rolled billets on the billet conveying roller table is arranged in the steam collection hood. The high-pressure spraying device includes a high-pressure gas generating device and a spray pipe located above the billet conveying roller table. The lower end of the spray pipe faces the hot-rolled billets on the billet conveying roller table. A steam conveying pipe is arranged between the spray pipe and the steam collection hood. One end of the steam conveying pipe is communicated with the top of the steam collection hood, and the other end is communicated with the upper end of the spray pipe through a one-way valve so that steam can enter the spray pipe through the one-way valve. A high-pressure gas nozzle communicated with the inner hole of the spray pipe is installed on the pipe body of the spray pipe. The high-pressure gas generating device is communicated with the high-pressure gas nozzle through a high-pressure gas pipe.
[0006] Spray cooling is an indispensable link in the billet rolling process. There is a set of spray devices before and after each rolling pass to reduce the temperature of the billet, facilitate its being bitten by the rolls, and ensure smooth rolling. Therefore, while the spray device sprays water to reduce the temperature of the billet, a large amount of high-temperature steam is generated. The present utility model utilizes this high-temperature steam. The high-temperature steam is collected through a steam collection hood, transported into the spray pipe through a steam delivery pipe. When it is necessary to descale the billet, the high-pressure gas generating device is turned on, and the generated high-pressure gas also enters the spray pipe through a high-pressure gas pipe. Due to the existence of a check valve at the upper end of the spray pipe, the high-pressure gas can only be ejected from the lower part of the spray pipe. Under the action of the high-speed downward flow of the high-pressure gas, according to Bernoulli's principle, the pressure above the spray pipe will decrease. Therefore, the steam will enter the spray pipe through the check valve, mix with the high-pressure gas in the spray pipe, and finally be ejected from the spray pipe. Compared with using high-pressure gas alone, the mixture of high-pressure gas and steam can form a high-speed jet flow. This high-speed jet flow can impact the scale with higher kinetic energy, thereby peeling it off from the metal surface. Moreover, the high temperature of the steam can soften the scale, making it easier to remove. The high temperature can also promote the decomposition of the metal surface oxide layer and reduce its adhesion. The present utility model utilizes the steam generated during the spray cooling process of the billet, does not increase the use cost alone, and can increase the descaling effect after combining with high-pressure gas, achieving the effect of energy conservation and emission reduction.
[0007] As an optimization, the top of the steam collection hood arches upward to form a steam gathering dome, and the steam delivery pipe is fixedly connected to the top of the steam gathering dome. This can better gather and collect the steam.
[0008] As an optimization, a steam gathering tank is provided at the upper end of the spray pipe. The outlet of the steam gathering tank is communicated with the upper end of the spray pipe. The check valve is located between the steam gathering tank and the spray pipe, and the steam delivery pipe is communicated with the inlet of the steam gathering tank. The steam gathering tank can increase the temporary storage space of the steam, enabling more steam to accumulate in the steam gathering tank for mixing with the high-pressure gas.
[0009] As an optimization, the high-pressure spraying device further includes a purging control device and a high-temperature infrared detection device. The signal output end of the high-temperature infrared detection device is electrically connected to the signal input end of the purging control device, and the signal output end of the purging control device is electrically connected to the signal input end of the high-pressure gas generating device. The high-temperature infrared detection device can detect the hot-rolled billet located below the spray pipe. When the high-temperature infrared detection device detects the hot-rolled billet, the purging control device controls the high-pressure gas generating device to generate high-pressure gas. This can detect the presence of the billet below the spray pipe and control the descaling operation when there is a billet, which can further reduce energy consumption and effectively control the generation of noise.
[0010] As an optimization, a sound-absorbing partition fixedly connected to the inner wall of the nozzle is arranged inside the nozzle. The plane where the sound-absorbing partition is located is perpendicular to the central axis of the nozzle. The connection position between the high-pressure air nozzle and the nozzle is located between the sound-absorbing partition and the upper nozzle opening. One side of the sound-absorbing partition facing the direction of the lower nozzle opening of the nozzle is fixedly connected with a sound-absorbing pipe arranged coaxially with the nozzle. The lower nozzle opening of the sound-absorbing pipe is located inside the nozzle. A number of sound-absorbing holes are formed in the sound-absorbing partition and the sound-absorbing pipe. High-speed gas flow can generate relatively large noise, so corresponding sound-absorbing devices are provided to reduce the noise decibel.
[0011] Compared with the prior art, the utility model improves the effect of removing impurities on the surface of the steel billet by recycling steam and mixing high-pressure gas, and effectively saves energy consumption. Moreover, it can also detect the position of the steel billet according to the temperature, realize automatic control of dephosphorization, and further reduce the energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic structural diagram of the utility model;
[0013] Figure 2 is a cross-sectional view of the nozzle in the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] In order to make the objectives, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the utility model. The components of the embodiments of the utility model described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed, but merely represents selected embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.
[0015] It should be noted that like reference numerals and letters indicate like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0016] As Figure 1 and Figure 2 shown, the hot-rolled steel billet surface descaling device in this specific embodiment includes a high-pressure spraying device and a steam collecting hood 1 erected above the steel billet conveying roller table. A spraying device for spraying water onto the hot-rolled steel billet on the steel billet conveying roller table is arranged in the steam collecting hood 1. The high-pressure spraying device includes a high-pressure gas generating device 2 and a spray pipe 3 located above the steel billet conveying roller table. The lower end nozzle of the spray pipe 3 faces the hot-rolled steel billet on the steel billet conveying roller table. A steam conveying pipe 4 is arranged between the spray pipe 3 and the steam collecting hood 1. One end of the steam conveying pipe 4 is communicated with the top of the steam collecting hood 1, and the other end is communicated with the upper end nozzle of the spray pipe 3 through a one-way valve so that steam can enter the spray pipe 3 through the one-way valve. A high-pressure gas nozzle 5 communicated with the inner hole of the spray pipe is installed on the pipe body of the spray pipe 3. The high-pressure gas generating device 2 is communicated with the high-pressure gas nozzle 5 through a high-pressure gas pipe.
[0017] In this specific embodiment, the top of the steam collecting hood 1 arches upward to form a steam gathering vault, and the steam conveying pipe 4 is fixedly connected to the top of the steam gathering vault 1.
[0018] In this specific embodiment, a steam accumulation tank 6 is provided at the upper end opening of the nozzle 3. The outlet of the steam accumulation tank 6 is communicated with the upper end opening of the nozzle 3. The one-way valve is located between the steam accumulation tank 6 and the nozzle 3. The steam delivery pipe 4 is communicated with the inlet of the steam accumulation tank 6.
[0019] In this specific embodiment, the high-pressure injection device further includes a purging control device and a high-temperature infrared detection device. The signal output end of the high-temperature infrared detection device is electrically connected to the signal input end of the purging control device. The signal output end of the purging control device is electrically connected to the signal input end of the high-pressure gas generating device. The high-temperature infrared detection device can detect the hot-rolled steel billet located below the nozzle 3. When the high-temperature infrared detection device detects the hot-rolled steel billet, the purging control device controls the high-pressure gas generating device 2 to generate high-pressure gas.
[0020] In this specific embodiment, a sound-absorbing partition 7 fixedly connected to the inner wall of the nozzle 3 is arranged in the nozzle 3. The plane where the sound-absorbing partition 7 is located is perpendicular to the center line of the nozzle 3. The connection position of the high-pressure gas nozzle 5 and the nozzle 3 is located between the sound-absorbing partition 7 and the upper end opening of the nozzle 3. One side of the sound-absorbing partition 7 facing the direction of the lower end opening of the nozzle 3 is fixedly connected with a sound-absorbing pipe 8 arranged coaxially with the nozzle 3. The lower end opening of the sound-absorbing pipe 8 is located inside the nozzle 3. A number of sound-absorbing holes 9 are formed in the sound-absorbing partition 7 and the sound-absorbing pipe 8.
[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described by referring to the preferred embodiments of the present invention, those of ordinary skill in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the present invention defined by the appended claims.
Claims
1. A hot-rolled steel billet surface dephosphorization device, characterized in that: It includes a high-pressure injection device and a steam collecting hood mounted above the billet conveying roller, wherein a spray device for spraying water toward the hot-rolled billet on the billet conveying roller is arranged in the steam collecting hood, the high-pressure injection device includes a high-pressure gas generating device and a nozzle located above the billet conveying roller, the lower end of the nozzle faces the hot-rolled billet on the billet conveying roller, a steam delivery pipe is arranged between the nozzle and the steam collecting hood, one end of the steam delivery pipe is connected with the top of the steam collecting hood, and the other end is connected with the upper end of the nozzle through a one-way valve so that steam can enter the nozzle through the one-way valve, a high-pressure gas nozzle connected with the inner hole of the nozzle is installed on the nozzle body of the nozzle, and the high-pressure gas generating device is connected with the high-pressure gas nozzle through a high-pressure gas pipe.
2. The hot rolled steel billet surface dephosphorization device according to claim 1, characterized in that: The top of the steam collecting hood is arched upward to form a steam gathering dome, and the steam delivery pipe is fixedly connected to the top of the steam gathering dome.
3. The hot rolled steel billet surface dephosphorization device according to claim 1, characterized in that: A steam gathering tank is arranged at the upper end of the nozzle, the outlet of the steam gathering tank is connected with the upper end of the nozzle, the one-way valve is located between the steam gathering tank and the nozzle, and the steam delivery pipe is connected with the inlet of the steam gathering tank.
4. The hot rolled steel billet surface dephosphorization device according to claim 1, characterized in that: The high-pressure injection device also includes a purge control device and a high-temperature infrared detection device. The signal output end of the high-temperature infrared detection device is electrically connected to the signal input end of the purge control device, and the signal output end of the purge control device is electrically connected to the signal input end of the high-pressure gas generating device. The high-temperature infrared detection device can detect the hot-rolled steel billet located below the nozzle. When the high-temperature infrared detection device detects the hot-rolled steel billet, the purge control device controls the high-pressure gas generating device to enable the high-pressure gas generating device to generate high-pressure gas.
5. The hot rolled steel billet surface dephosphorization device according to claim 1, characterized in that: A silencer baffle fixedly connected to the inner wall of the nozzle is arranged in the nozzle, and the plane where the silencer baffle is located is perpendicular to the center line of the nozzle. The connection position between the high-pressure gas nozzle and the nozzle is located between the silencer baffle and the upper end pipe opening of the nozzle. A silencer pipe arranged on the same center line as the nozzle is fixedly connected to the side of the silencer baffle facing the direction of the lower end pipe opening of the nozzle, and the lower end pipe opening of the silencer pipe is located in the nozzle. A plurality of silencer holes are provided on the silencer baffle and the silencer pipe.