Device for rapidly improving the dew point of ammonia decomposition gas atmosphere
Patent Information
- Application Number
- CN202522141905.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-10
AI Technical Summary
[0003]本实用新型的目的在于提供一种快速改善氨分解气气氛露点装置，以解决上述背景技术中提出的现有的调节措施难以向炉内引入低露点氮气，导致露点调节耗时久、精度低的问题
通过设置的气氛露点调节组件，使得便于通过氮气瓶向主体炉的内部补充氮气，从而快速改善氨分解气气氛露点，进而提高生产效率，加快生产进度，同时，通过设置的精准控制组件，使得便于通过控制器精准控制对应的电子控制阀，通过电子控制阀精准控制氮气流量，进而提高氮气供应的精准性，提高气氛露点调节效果，其次，通过设置的固定定位组件，使得便于对氮气瓶进行定位固定，同时也便于在氮气瓶氮气不足时将氮气瓶进行拿出更换，提高氮气更换的便利性。
Smart Images
Figure CN224832785U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dew point technology for bright annealing furnaces for steel strips, specifically a device for rapidly improving the dew point of ammonia decomposition gas atmosphere. Background Technology
[0002] In the bright annealing production of stainless steel strip, the dew point of the ammonia decomposition gas atmosphere in the main furnace is a key parameter affecting product quality. It needs to be maintained within a specific low dew point range to avoid oxidation of the steel strip surface. When the dew point in the furnace atmosphere rises abnormally, it needs to be quickly adjusted to restore production conditions. Currently, the industry mainly addresses this by adjusting the ammonia decomposition gas flow rate, reducing the production speed, or shutting down the furnace and waiting. However, existing regulation measures are insufficient to introduce low-dew-point nitrogen into the furnace, resulting in lengthy dew-point regulation times that severely impact production efficiency and schedule. Furthermore, flow control relies on manual operation, leading to low precision and difficulty in matching dew-point regulation requirements under different operating conditions, easily resulting in over- or under-regulation. Additionally, the nitrogen cylinder's fixed structure is rudimentary, requiring machine shutdown and disassembly for replacement, which is cumbersome and time-consuming, further extending dew-point recovery time and increasing the risk of production interruption. Therefore, a device for rapidly improving the dew-point atmosphere of ammonia decomposition gas is urgently needed to solve these problems. Utility Model Content
[0003] The purpose of this invention is to provide a device for rapidly improving the dew point of ammonia decomposition gas atmosphere, so as to solve the problem that the existing adjustment measures mentioned in the background art are difficult to introduce low dew point nitrogen into the furnace, resulting in long dew point adjustment time and low accuracy.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a device for rapidly improving the dew point of ammonia decomposition gas atmosphere, comprising a main furnace, and further comprising: An atmosphere dew point regulating component is disposed on the side wall of the main furnace and is used to quickly improve the atmosphere dew point inside the main furnace. A precision control component is disposed on the side wall of the main furnace and is used to precisely control the atmosphere dew point adjustment component. A fixed positioning component is disposed on the side wall of the main furnace and is used to fix and position the atmosphere dew point adjustment component.
[0005] Preferably, the atmosphere dew point adjustment component includes multiple nitrogen cylinders, all of which are disposed on the side wall of the main furnace. The side wall of the main furnace has two fixing holes, and a connecting pipe is fixedly connected to the inner wall of the fixing holes. A spray plate is fixedly connected to the inner wall of the main furnace, and the fixing holes are fixedly connected to the inner wall of the spray plate.
[0006] Preferably, the precision control component includes a controller, which is fixedly connected to the side wall of the main furnace. The side wall of the main furnace is provided with multiple electronic control valves and multiple connecting pipes. The multiple connecting pipes and connecting pipes are all connected through electronic control valves, and the electronic control valves are electrically connected to the controller.
[0007] Preferably, the fixed positioning component includes a fixing frame, which is detachably connected to the side wall of the main furnace by bolts. The surface of the fixing frame is provided with multiple limiting grooves, and multiple nitrogen cylinders are disposed on the inner wall of the limiting grooves.
[0008] Preferably, the side wall of the main furnace is fixedly connected with multiple limiting frames, and each of the multiple limiting frames is fixedly connected to the surface of the connecting pipe.
[0009] Preferably, the side wall of the main furnace is provided with multiple quick connectors, and the exhaust pipe of the nitrogen cylinder is connected to the connecting pipe through the quick connectors.
[0010] Compared with the prior art, the beneficial effects of this utility model are: The atmosphere dew point adjustment component facilitates the replenishment of nitrogen into the main furnace via nitrogen cylinders, thereby rapidly improving the atmosphere dew point of ammonia decomposition gas, increasing production efficiency, and accelerating production progress. Simultaneously, the precision control component allows for precise control of the corresponding electronic control valves via a controller, which in turn precisely controls the nitrogen flow rate, improving the accuracy of nitrogen supply and enhancing the atmosphere dew point adjustment effect. Furthermore, the fixed positioning component facilitates the positioning and fixing of nitrogen cylinders, and also allows for easy removal and replacement of nitrogen cylinders when nitrogen levels are low, improving the convenience of nitrogen replacement. Attached Figure Description
[0011] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 for Figure 1 Enlarged structural diagram at point B.
[0012] In the diagram: 1. Main furnace; 201. Nitrogen cylinder; 202. Fixing hole; 203. Connecting pipe; 204. Spray plate; 205. Quick connector; 301. Controller; 302. Connecting pipe; 303. Electronic control valve; 401. Fixing frame; 402. Limiting groove; 403. Limiting frame. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] Please see Figure 1 - Figure 3 The present invention provides a device for rapidly improving the dew point of ammonia decomposition gas atmosphere, comprising a main furnace 1, and further comprising: Atmosphere dew point adjustment component, which is installed on the side wall of the main furnace 1, is used to quickly improve the atmosphere dew point inside the main furnace 1; A precision control component is installed on the side wall of the main furnace 1 and is used to precisely control the atmosphere dew point adjustment component. A fixed positioning component is installed on the side wall of the main furnace 1 to fix the atmosphere dew point adjustment component. This component facilitates the replenishment of nitrogen into the main furnace 1, thereby quickly improving the atmosphere dew point of the ammonia decomposition gas, increasing production efficiency, and accelerating production progress. Simultaneously, the precision control component allows for precise control of nitrogen flow, improving the accuracy of nitrogen supply and enhancing the atmosphere dew point adjustment effect. Furthermore, the fixed positioning component facilitates the fixation of the atmosphere dew point adjustment component, improving the convenience of nitrogen replacement.
[0015] Furthermore, the atmosphere dew point regulating component includes multiple nitrogen cylinders 201, all of which are disposed on the side wall of the main furnace 1. Two fixing holes 202 are provided on the side wall of the main furnace 1. Connecting pipes 203 are fixedly connected to the inner wall of the fixing holes 202. A spray plate 204 is fixedly connected to the inner wall of the main furnace 1. The fixing holes 202 are fixedly connected to the inner wall of the spray plate 204. Through the configured atmosphere dew point regulating component, nitrogen is stored inside the nitrogen cylinders 201, and the dew point of the nitrogen inside the nitrogen cylinders 201 must be below -60°C. When the steel strip is first produced and changed coils, a small amount of nitrogen is added to the interior of the main furnace 1 through nitrogen cylinder 201. The nitrogen inside nitrogen cylinder 201 enters the spray plate 204 through connecting pipe 203, and is then evenly sprayed into the interior of the main furnace 1 through spray plate 204. The total amount of nitrogen added accounts for about 20% of the total flow rate. When the atmosphere inside the furnace returns to normal, the nitrogen supply is stopped, which facilitates the adjustment of the atmosphere dew point inside the main furnace 1. At the same time, the annealing rate calculated according to the normal TV (thickness × speed, penetration depth per unit time) value is relatively fast, and the material thickness is low. At a depth of 0.2 mm, the change in the dew point of the furnace atmosphere during normal annealing can be estimated by calculating the DV (width × speed, surface area passing through per unit time). When the estimated dew point increase is significant, the ammonia decomposition gas flow rate is increased, and simultaneously, nitrogen cylinder 201 is opened to rapidly replenish low-dew-point nitrogen into the main furnace 1. The flow rate can be half that of the normal ammonia decomposition gas. Once the atmosphere inside the main furnace 1 stabilizes, the nitrogen flow rate can be slowly reduced until it is minimal or even stopped. Furthermore, if the DV value exceeds the self-cleaning capacity of the furnace atmosphere, then... Based on the above operations, the speed should be appropriately reduced, that is, the TV and DV values should be reduced simultaneously to ensure the surface quality of the steel strip. Secondly, by setting multiple nitrogen cylinders 201, it is easy to ensure the sufficiency of nitrogen supply. When one of the multiple nitrogen cylinders 201 is insufficient, it can be replenished individually to avoid affecting the overall nitrogen supply inside the main furnace 1 when replenishing nitrogen. The spray plate 204 is a common spray component with spray holes for spraying nitrogen inside. The spray plate 204 is the prior art in this application and will not be described in detail here.
[0016] Furthermore, the precision control component includes a controller 301, which is fixedly connected to the side wall of the main furnace 1. The side wall of the main furnace 1 is provided with multiple electronic control valves 303 and multiple connecting pipes 302. The multiple connecting pipes 302 and connecting pipes 203 are all connected to each other through electronic control valves 303. The electronic control valves 303 are electrically connected to the controller 301. Through the precision control component, it is easy to precisely control the corresponding electronic control valves 303 through the controller 301, and precisely control the nitrogen flow rate through the electronic control valves 303, thereby improving the accuracy of nitrogen supply and improving the atmosphere dew point adjustment effect.
[0017] Furthermore, the fixed positioning assembly includes a fixing frame 401, which is detachably connected to the side wall of the main furnace 1 by bolts. The surface of the fixing frame 401 is provided with multiple limiting grooves 402, and multiple nitrogen cylinders 201 are all set in the inner wall of the limiting grooves 402. Multiple limiting brackets 403 are fixedly connected to the side wall of the main furnace 1, and multiple limiting brackets 403 are fixedly connected to the surface of the connecting pipe 203. The fixed positioning assembly facilitates the positioning of the nitrogen cylinders 201. At the same time, the limiting grooves 402 facilitate the positioning and fixing of the nitrogen cylinders 201, and also facilitate the removal and replacement of the nitrogen cylinders 201 when the nitrogen is insufficient, thus improving the convenience of nitrogen replacement. The limiting brackets 403 facilitate the fixed positioning of the connecting pipe 203, thereby ensuring the stability of the connecting pipe 203 during use.
[0018] Furthermore, the side wall of the main furnace 1 is provided with multiple quick connectors 205. The exhaust pipe of the nitrogen cylinder 201 is connected to the connecting pipe 302 through the quick connectors 205. The quick connectors 205 facilitate quick connection between the exhaust pipe of the nitrogen cylinder 201 and the connecting pipe 302, thereby improving the replacement efficiency of the nitrogen cylinder 201.
[0019] Working Principle: Nitrogen cylinder 201 stores nitrogen gas through an atmosphere dew point adjustment component. The dew point of the nitrogen gas inside cylinder 201 must be below -60℃. When the steel strip is first changed, a small amount of nitrogen is supplied to the main furnace 1 through cylinder 201. The nitrogen gas inside cylinder 201 enters the spray plate 204 through connecting pipe 203, and is then evenly sprayed into the main furnace 1 through spray plate 204. The total amount of nitrogen supplied accounts for approximately 20% of the total flow rate. When the atmosphere inside the furnace returns to normal, the nitrogen supply is stopped, thus facilitating the adjustment of the atmosphere dew point inside the main furnace 1. Simultaneously, the annealing speed can be calculated based on the normal TV (thickness × speed, penetration depth per unit time) value. When the material thickness is less than 0.2mm, the DV (width × speed, surface area passing through per unit time) can be calculated. The dew point (DV) value is used to predict the change in the furnace atmosphere dew point during normal annealing. When the predicted dew point increases significantly, the ammonia decomposition gas flow rate is increased, and at the same time, the nitrogen cylinder 201 is opened to quickly replenish the interior of the main furnace 1 with low dew point nitrogen. The flow rate can be half of the normal ammonia decomposition gas flow rate. After the interior atmosphere of the main furnace 1 stabilizes, the nitrogen flow rate can be slowly reduced until it is very small or even stopped. Secondly, if the DV value exceeds the self-cleaning ability of the furnace atmosphere, the speed needs to be appropriately reduced based on the above operations, that is, the TV and DV values are reduced simultaneously to ensure the surface quality of the steel strip. Furthermore, the multiple nitrogen cylinders 201 facilitate the guarantee of sufficient nitrogen supply. When one of the multiple nitrogen cylinders 201 is insufficient, it can be replenished separately to avoid affecting the overall nitrogen supply inside the main furnace 1 when replenishing nitrogen.
[0020] Meanwhile, the precise control components make it easy to precisely control the corresponding electronic control valve 303 through the controller 301, and to precisely control the nitrogen flow through the electronic control valve 303, thereby improving the accuracy of nitrogen supply and enhancing the atmosphere dew point regulation effect.
[0021] Secondly, the fixed positioning component facilitates the positioning of the nitrogen cylinder 201. At the same time, the limiting groove 402 not only fixes the nitrogen cylinder 201 in place, but also makes it easy to remove and replace the nitrogen cylinder 201 when the nitrogen is insufficient, thus improving the convenience of nitrogen replacement. The limiting bracket 403 facilitates the fixing and positioning of the connecting pipe 203, thereby ensuring the stability of the connecting pipe 203 during use.
[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A device for rapidly improving the dew point of ammonia decomposition gas atmosphere, comprising a main furnace (1), characterized in that, Also includes: Atmosphere dew point adjustment component, which is disposed on the side wall of the main furnace (1) for rapidly improving the atmosphere dew point inside the main furnace (1); A precision control component is disposed on the side wall of the main furnace (1) and is used to precisely control the atmosphere dew point adjustment component; A fixed positioning component is disposed on the side wall of the main furnace (1) and is used to fix and position the atmosphere dew point adjustment component.
2. The device for rapidly improving the dew point of ammonia decomposition gas atmosphere according to claim 1, characterized in that: The atmosphere dew point adjustment assembly includes multiple nitrogen cylinders (201), all of which are disposed on the side wall of the main furnace (1). The side wall of the main furnace (1) has two fixing holes (202). A connecting pipe (203) is fixedly connected to the inner wall of the fixing hole (202). A spray plate (204) is fixedly connected to the inner wall of the main furnace (1). The fixing hole (202) is fixedly connected to the inner wall of the spray plate (204).
3. The device for rapidly improving the dew point of ammonia decomposition gas atmosphere according to claim 2, characterized in that: The precision control component includes a controller (301), which is fixedly connected to the side wall of the main furnace (1). The side wall of the main furnace (1) is provided with multiple electronic control valves (303) and multiple connecting pipes (302). The multiple connecting pipes (302) and connecting pipes (203) are all connected through electronic control valves (303). The electronic control valves (303) are electrically connected to the controller (301).
4. The device for rapidly improving the dew point of ammonia decomposition gas atmosphere according to claim 2, characterized in that: The fixed positioning component includes a fixed frame (401), which is detachably connected to the side wall of the main furnace (1) by bolts. The surface of the fixed frame (401) is provided with multiple limiting grooves (402), and multiple nitrogen cylinders (201) are disposed on the inner wall of the limiting grooves (402).
5. The device for rapidly improving the dew point of ammonia decomposition gas atmosphere according to claim 4, characterized in that: The side wall of the main furnace (1) is fixedly connected with multiple limiting frames (403), and the multiple limiting frames (403) are fixedly connected to the surface of the connecting pipe (203).
6. The device for rapidly improving the dew point of ammonia decomposition gas atmosphere according to claim 3, characterized in that: The main furnace (1) is provided with multiple quick connectors (205) on its side wall, and the exhaust pipe of the nitrogen cylinder (201) is connected to the connecting pipe (302) through the quick connectors (205).