Flue gas dissipation preventing device used in PS converter
By designing the trough and fan connection between the inner and outer smoke covers in the PS converter, the flue gas from the outer environmentally friendly flue is pumped to the inner process flue, which solves the problem of flue gas dissipation during the converter shaker. Reduces environmental risks and health hazards.
Patent Information
- Application Number
- CN202420220365.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-29
AI Technical Summary
During the shaker of the existing PS converter, a large amount of flue gas will be dissipated through the outer hood to the operating environment, endangering the health of the operators and causing environmental protection risks.
Design a device to prevent the dissipation of smoke, including an inner fixed cigarette hood and an outer fixed cigarette hood. The inner fixed cigarette hood is provided with a groove and a inner process flue. The outer layer is provided with an outer layer. The fan is installed in the trough. The fan pumps the flue gas in the outer environmentally friendly flue to the inner process flue to form a negative pressure to reduce the flue gas escape.
By pumping flue gas to the inner process flue, the flue gas escapes into the working environment, reduces environmental risks, and ensures the health of operators.
Smart Images
Figure CN222352922U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metallurgical equipment, in particular to a device for preventing smoke from escaping in a PS converter. Background Art
[0002] The horizontal side-blown converter, also known as the PS converter (hereinafter referred to as the converter), is commonly used for two main tasks in copper-nickel smelting: one is to process matte to obtain blister copper, and the other is to process low-nickel matte to obtain high-nickel matte. However, due to the intermittent operation of the converter, the furnace mouth is separated from the smoke hood during the tilting and returning operations, and the smoke is captured by the outer smoke hood and collected into the environmental protection smoke pipe. In the process, due to the large range of the furnace mouth out of the smoke hood, the smoke capture rate of the smoke collection system is low, which will cause smoke to escape.
[0003] The smoke collecting equipment in the prior art mainly comprises an outer environmental protection smoke hood and an inner fixed smoke hood. The inner smoke hood is provided with a feed port for feeding. In order to prevent smoke from escaping from the feed port to the outer layer during the blowing process, a slidable movable smoke hood is provided on the inner fixed smoke hood, and the movable smoke hood can slide up and down along the inner smoke hood; however, when the converter needs to be fed, the movable smoke hood is pulled upward (such as the attached Figure 4 As shown), the movable smoke hood should be prevented from blocking the charging. At this time, most of the smoke will enter the outer environmental protection smoke hood; after charging, in order to prevent the molten metal from backflowing and blocking the tuyere at the bottom of the converter, sufficient wind pressure needs to be established at the air inlet, and this process lasts for about 15 seconds; in this process, due to the high internal wind pressure, a large amount of high-temperature acidic smoke will be sprayed outward, carrying molten metal droplets. The high-temperature splashes are very easy to adhere to the movable smoke hood, forming large pieces and large-area agglomerations, which are not only difficult to clean, but also damage the inner smoke hood when the movable smoke hood slides; therefore, for safety reasons, the movable smoke hood is often placed at the upper limit. Without the blocking of the movable smoke hood, a large amount of smoke will enter the outer environmental protection smoke hood.
[0004] In summary, a large amount of flue gas will enter the outer environmental protection smoke hood during the shaking process of the converter in the prior art, especially in the 15 seconds when the wind pressure is established during the shaking process. Since the outer smoke hood is not completely closed, some flue gas will escape into the working environment. Since the flue gas contains SO2, dust, lead dust, arsenic dust, etc., it will seriously endanger the health of the operators and cause greater environmental risks.
[0005] In view of this, the existing technology still needs to be improved and developed. Utility Model Content
[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a device for preventing smoke escape in a PS converter, aiming to solve the problem that during the shaking process of the existing converter, some smoke will escape into the working environment through the outer smoke hood, which will endanger the health of the operators.
[0007] The technical solution adopted by the utility model to solve the technical problem is as follows:
[0008] A device for preventing smoke from escaping in a PS converter, comprising an inner fixed smoke hood and an outer fixed smoke hood, wherein an inner process smoke duct is arranged inside the inner fixed smoke hood, and an outer environmental protection smoke duct is arranged inside the outer fixed smoke hood, characterized in that it also comprises:
[0009] A through groove is arranged inside the inner fixed smoke hood and is respectively connected with the inner process smoke duct and the outer environmental protection smoke duct;
[0010] The fan is arranged inside the through groove to pump the flue gas in the outer environmental protection flue to the inner process flue.
[0011] Furthermore, a plurality of smoke monitors are provided at the outlet of the outer environmental protection flue to monitor the smoke concentration inside the outer environmental protection flue.
[0012] Furthermore, a fan frame is arranged inside the through slot, and the fan is rotatably arranged on the fan frame.
[0013] Furthermore, the fan is an axial flow fan.
[0014] Furthermore, the fan is connected to the fan frame by bolts.
[0015] Furthermore, the fan frame is arranged in the through groove by welding.
[0016] Furthermore, the surface of the fan is provided with a coating for heat protection and corrosion protection.
[0017] Furthermore, a display is provided on the outer side of the outer fixed smoke hood.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] In the utility model, an inner layer process flue is arranged inside the inner layer fixed smoke hood, an outer layer environmental protection flue is arranged inside the outer layer fixed smoke hood, a through groove is arranged inside the inner layer fixed smoke hood, and is respectively connected with the inner layer process flue and the outer layer environmental protection flue, and a fan is arranged inside the channel for pumping the flue gas in the outer layer environmental protection flue into the inner process flue; when the converter is shaking, the opening of the converter will correspond to and be connected with the outer layer environmental protection flue, and when ventilation is carried out through the air outlet at the bottom of the converter, a large amount of flue gas will enter the outer layer process flue, and the outer layer environmental protection flue will be discharged from the outside of the converter. The environmental protection flue, since the outer environmental protection flue is connected to the external working environment, some of it will escape into the working environment; the present application sets through grooves and fans in the inner fixed smoke hood, so that the flue gas in the outer environmental protection flue can be pumped into the inner process flue. At the same time, a certain negative pressure is generated inside the outer environmental protection flue, so that the flue gas generated in the converter flows to the outer environmental protection flue, and then is pumped into the inner process flue, thereby reducing the escape of flue gas into the working environment, so as to ensure the health of the staff and reduce the probability of environmental risks. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the utility model.
[0021] Figure 2 This is a schematic diagram of the fan position structure of the utility model.
[0022] Figure 3 It is a schematic diagram of the converter blowing working condition structure in the prior art.
[0023] Figure 4 It is a schematic diagram of the converter shaking furnace working condition structure in the prior art.
[0024] Figure 5 This is a system block diagram of the device for preventing smoke escape in a PS converter provided by the utility model.
[0025] The numbers marked in the figure are as follows: 1. inner fixed smoke hood; 11. inner process flue; 2. outer fixed smoke hood; 21. outer environmental protection flue; 22. movable smoke hood; 23. feed port; 3. converter; 31. air outlet; 32. opening; 4. fan; 5. controller; 6. flue gas monitor; 7. display; 8. cylinder. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, 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 utility model, unless otherwise specified, "multiple" means two or more.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In view of the shortcomings of the prior art, this embodiment provides a device for preventing smoke from escaping in a PS converter, which can be specifically described as follows:
[0030] As attached Figure 3 and attached Figure 4 As shown, the existing horizontal side-blown converter equipment includes an inner fixed smoke hood 1, an outer fixed smoke hood 2, a movable smoke hood 22 and a converter 3. An inner process flue 11 is arranged inside the inner fixed smoke hood 1, and the inner process flue 11 is connected to the subsequent acid making process. The high-temperature acidic flue gas generated in the converter 3 will flow from the inner process flue 11 to the waste heat boiler and other equipment for subsequent acid making processes; an outer environmental protection flue 21 is arranged inside the outer fixed smoke hood 2, and an environmental protection device is arranged above the outer environmental protection flue 21. When the converter 3 is shaken, the high-temperature acidic flue gas discharged from the converter 3 will enter the outer environmental protection flue 21, and will pass through the environmental protection device above to perform dust removal and desulfurization processes, so that the flue gas meets the standards before being discharged; in addition, a feed port 23 is opened at the bottom of the inner fixed smoke hood 1, and the sliding of the movable smoke hood 22 is to cooperate with the converter 3 to close or open the feed port 23.
[0031] An operating groove is provided at the bottom of the outer fixed smoke hood 2 , and the operating groove is used for manually filling the converter 3 . The operating groove is connected to the outer environmental protection flue 21 .
[0032] As attached Figure 1 and attached Figure 2 As shown, a device for preventing smoke from escaping in a PS converter 3 comprises an inner fixed smoke hood 1, an outer fixed smoke hood 2, a through slot and a fan 4. The inner fixed smoke hood 1 is connected to the outer fixed smoke hood 2, and an inner process flue 11 is arranged inside the inner fixed smoke hood 1, and an outer environmental protection flue 21 is arranged inside the outer fixed smoke hood 2. A converter 3 is rotatably arranged at the bottom of the outer fixed smoke hood 2, and an opening 32 is provided on the converter 3. By rotating the converter 3, the opening 32 can correspond to the inner process flue 11 and the outer environmental protection flue 21. An air port 31 is provided at the bottom of the converter 3 for introducing oxygen for blowing. A through slot is provided inside the inner fixed smoke hood 1, and one end of the through slot is connected to the inner process flue 11, and the other end is connected to the outer environmental protection flue 21. The inner process flue 11 can be blown by the through slot. The process flue 11 is connected with the outer environmental protection flue 21, and a fan 4 is arranged inside the through groove. After the fan 4 is started, the flue gas in the outer environmental protection flue 21 can be pumped into the inner process flue 11, so as to realize the circulation of the flue gas in the outer environmental protection flue 21 and prevent a large amount of flue gas from entering the outer environmental protection flue 21 and entering the working environment through the bottom of the outer environmental protection flue 21 due to untimely discharge; by setting the through groove and the fan 4, the flue gas in the outer environmental protection flue 21 is pumped into the inner process flue 11, and at the same time, under the action of the fan 4, the inside of the outer environmental protection flue 21 is in a certain negative pressure state, and the flue gas discharged from the converter 3 will first enter the outer environmental protection flue 21, which effectively reduces the situation of flue gas escaping to the working environment, so as to ensure the health of the staff and reduce the probability of environmental risks.
[0033] Specifically, in the converter 3 blowing stage (such as the attached Figure 1As shown, the angle of the converter 3 at this time is defined as 0 degrees), and the movable smoke hood 22 is in the lower limit position. At this time, the movable smoke hood 22 cooperates with the inner fixed smoke hood 1 to completely block the smoke discharged from the converter 3 from escaping into the outer environmental protection flue 21, and the high-temperature acidic smoke will enter the inner process flue 11; when the converter 3 is shaken, the movable smoke hood 22 will be pulled upward. At this time, the high-temperature acidic smoke discharged from the converter 3 will enter the outer fixed smoke hood 2; in the process of shaking the converter 3, the converter 3 is usually in the range of 0° to -60° (the negative sign is defined as counterclockwise rotation along 0°), which is divided into two situations: shaking in and shaking out the copper liquid. When shaking out, the tuyere 31 in the converter 3 moves from below the molten metal level in the furnace to above the molten metal level, generally rotating -45°. After ensuring that the tuyere 31 is above the molten metal level, the valve of the tuyere 31 is closed to reduce the gushing of smoke. Then, it is rotated counterclockwise by 15° (at this time the converter 3 is at -60°) so that the opening 32 of the converter 3 is aligned with the feed port 23 on the inner fixed smoke hood 1. To prevent the movable smoke hood 22 from interfering with the feeding, the movable smoke hood 22 is placed in the upper limit position, that is, the feed port 23 is open. At this time, most of the smoke inside the converter 3 will enter the outer environmental protection flue 21. After feeding, the converter 3 rotates clockwise by 15° (at this time the converter 3 is at -45°), and the valve of the tuyere 31 is opened. To prevent the molten metal from backflowing and blocking the tuyere 31, the tuyere 31 needs to establish sufficient wind pressure. This process lasts about 15 seconds. In this process, due to the high internal wind pressure, a large amount of high-temperature acidic flue gas will be sprayed outward, carrying molten metal droplets. The high-temperature splashes can easily adhere to the movable smoke hood 22, forming large blocks and large-area agglomerations, which are not only difficult to clean, but also damage the inner smoke hood when the movable smoke hood 22 slides. Therefore, for safety reasons, the movable smoke hood 22 is often placed in the upper limit position. Without the obstruction of the movable smoke hood 22, a large amount of flue gas will enter the outer environmental protection flue 21. Finally, after the wind pressure is established, the converter 3 rotates 45° clockwise (the converter 3 is at 0° at this time) to start a new round of blowing process;
[0034] From the above, it can be seen that during the shaking of the furnace, a large amount of flue gas will enter the outer environmental protection flue 21, especially within 15 seconds when the wind pressure is established during the shaking process, a large amount of flue gas will suddenly increase inside the outer environmental protection flue 21, which is not easy to be completely absorbed and discharged by the outer environmental protection flue 21; since the amount of flue gas processed inside the outer environmental protection flue 21 is limited, the flue gas in the outer environmental protection flue 21 will escape into the working environment; the present application can pump the flue gas in the outer environmental protection flue 21 into the inner process flue 11 by setting a through groove and a fan 4, so as to reduce the flue gas in the outer environmental protection flue 21, and at the same time make the outer environmental protection flue 21 in a negative pressure state, so that the flue gas discharged from the converter 3 can flow to the inner part of the outer environmental protection flue 21, so as to achieve the purpose of flue gas transfer, so that there is only a small amount of flue gas in the outer environmental protection flue 21, thereby reducing the situation of flue gas escaping to the working environment, ensuring the health of the staff and reducing the probability of environmental risks.
[0035] In one embodiment of the present application, during the use of the converter 3, the fan 4 rotates slowly to prevent the smoke inside the inner process flue 11 from entering the outer environmental protection flue 21 through the through groove due to the fan 4 stopping rotating, and at the same time prevents the smoke generated by the converter 3 from entering the outer environmental protection flue 21 and then escaping into the working environment.
[0036] In this embodiment, a controller 5 is arranged outside the outer fixed smoke hood 2, and a plurality of smoke monitors 6 are arranged at the outlet position inside the outer environmental protection smoke duct 21. The smoke monitors 6 are used to monitor the smoke concentration inside the outer environmental protection smoke duct 21. The controller 5 is electrically connected to the fan 4 and the plurality of smoke monitors 6 (see attached Figure 5 As shown); during the shaking process of the converter 3, the flue gas concentration inside the outer environmental protection flue 21 can be monitored by the flue gas monitor 6, and a signal is sent to the controller 5 in real time. When the flue gas concentration reaches a preset value, the controller 5 will send a signal to the fan 4. The fan 4 is provided with a speed regulator to increase the rotation speed of the fan 4 so that the fan 4 draws the flue gas inside the outer environmental protection flue 21 into the inner process flue 11; in the refining mode, that is, when the opening 32 of the converter 3 is located in the inner process flue 11, the feedback frequency of the flue gas concentration collected by the flue gas monitor 6 is 1 time / minute; in the shaking process, the opening 32 of the converter 3 is aligned with the outer environmental protection smoke hood, and the frequency of the flue gas concentration collected by the flue gas monitor 6 is 1 time / second.
[0037] In this embodiment, the flue gas monitor 6 is a SO2 gas concentration monitor, which is used to monitor the concentration of SO2 gas in the flue gas; a display 7 is provided on the outside of the outer fixed smoke hood 2, and the display 7 is electrically connected to the controller 5. The display 7 is used to display the SO2 gas concentration value in the flue gas, and can also display the working condition of the fan 4, that is, the start and stop status of the fan 4 and the speed of the fan 4.
[0038] In this embodiment, four flue gas monitors 6 are arranged at the outlet of the outer environmental protection flue 21. Since the flue gas may be unevenly distributed in the outer environmental protection flue 21, the four flue gas monitors 6 are respectively arranged on the four side walls of the outlet of the outer environmental protection flue 21. The four flue gas monitors 6 simultaneously detect the gas concentration value of sulfur dioxide in the flue gas. The average value of the four flue gas monitors 6 can be calculated by manual calculation or computing equipment, and then transmitted to the controller 5. The controller 5 compares whether the preset value is reached. If the preset value is reached, the controller 5 sends a signal to the fan 4, and the speed of the fan 4 increases to increase the extraction of the flue gas.
[0039] In one embodiment of the present application, a fan rack is disposed inside the through slot, and the fan 4 is rotatably disposed on the fan rack, and the fan rack is used to provide a mounting frame for the fan 4; at the same time, the fan rack and the side wall of the through slot are sealed.
[0040] In this embodiment, a through groove is opened along the side wall of the outer environmental protection flue 21 so that the fan frame is connected to the outer fixed smoke hood 2 and the inner fixed smoke hood 1; specifically, the fan frame in the through groove is connected to the outer fixed smoke hood 2 and the inner fixed smoke hood 1 by welding.
[0041] In this embodiment, the fan 4 is an axial flow fan, and the fan 4 is connected to the fan frame by bolts to facilitate disassembly, cleaning or replacement of the fan 4.
[0042] In this embodiment, since the flue gas has the characteristics of high temperature and corrosion, a coating is provided on the surface of the fan 4 for heat protection and corrosion protection.
[0043] In one embodiment of the present application, a cylinder 8 is provided on the side of the inner fixed smoke hood 1 close to the outer fixed smoke hood 2, and the output end of the cylinder 8 is connected to the side wall of the movable smoke hood 22; specifically, a hinge is provided on the output end of the cylinder 8, and the side of the hinge away from the cylinder 8 is connected to the movable smoke hood 22; through the cylinder 8, the movable smoke hood 22 can close or open the feed port 23, the cylinder 8 is electrically connected to the controller 5, and the controller 5 is used to send a start and stop signal to the cylinder 8 so that the cylinder 8 drives the movable smoke hood 22 to move.
[0044] In this embodiment, a slide rail is provided on one side of the outer fixed smoke hood 2 where the movable smoke hood 22 is provided, and a slider is provided on the side of the movable smoke hood 22 close to the outer fixed smoke hood 2. The slider cooperates with the slide rail so that the movable smoke hood 22 can slide on the surface of the outer fixed smoke hood 2, and the movable smoke hood 22 and the outer fixed smoke hood 2 are sealed.
[0045] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the solutions disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present solution. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.
Claims
1. A device for preventing smoke from escaping in a PS converter, comprising an inner fixed smoke hood and an outer fixed smoke hood, wherein an inner process smoke duct is arranged inside the inner fixed smoke hood, and an outer environmental protection smoke duct is arranged inside the outer fixed smoke hood, characterized in that: Also includes: A through groove is arranged inside the inner fixed smoke hood and is respectively connected with the inner process smoke duct and the outer environmental protection smoke duct; The fan is arranged inside the through groove to pump the flue gas in the outer environmental protection flue to the inner process flue.
2. The device for preventing smoke from escaping in a PS converter according to claim 1, characterized in that: A plurality of smoke monitors are arranged at the outlet of the outer environmental protection flue to monitor the smoke concentration inside the outer environmental protection flue.
3. The device for preventing smoke from escaping in a PS converter according to claim 1, characterized in that: A fan frame is arranged inside the through slot, and the fan is rotatably arranged on the fan frame.
4. The device for preventing smoke from escaping in a PS converter according to claim 3, characterized in that: The fan is an axial flow fan.
5. The device for preventing smoke from escaping in a PS converter according to claim 4, characterized in that: The fan is connected to the fan frame through bolts.
6. The device for preventing smoke from escaping in a PS converter according to claim 5, characterized in that: The fan frame is arranged in the through slot by welding.
7. The device for preventing smoke from escaping in a PS converter according to claim 1, characterized in that: The surface of the fan is provided with a coating for heat protection and corrosion protection.
8. The device for preventing smoke from escaping in a PS converter according to claim 1, characterized in that: A display is arranged on the outer side of the outer fixed smoke hood.