Furnace top air inlet device of side-blown furnace
By designing the air sleeve and blower duct group on the top of the side blower furnace, uniform heating and distribution of air is achieved, and the damage of cold air to refractory materials and CO agglomeration and explosion problems are solved, and equipment safety and production efficiency are improved.
Patent Information
- Application Number
- CN202422315545.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The cold air in existing side blowers has a great impact on the life of refractory materials and the air distribution is uneven, and CO gas is prone to agglomeration, resulting in a high risk of explosion.
A side blower furnace top air inlet device is designed, and air is blown into the air sleeve through a blower to cool and heat it. The heated air is blown evenly into the furnace using a blower duct group to promote the secondary combustion of CO and O2 to generate CO2, and a slag removal box is set up for air purification.
It effectively reduces the risk of CO agglomeration and explosion in the side blower, improves equipment safety, reduces damage to refractory materials, and reduces production costs.
Smart Images
Figure CN223154019U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of side-blown furnaces, and particularly relates to an air inlet device for the top of a side-blown furnace. Background Art
[0002] During the smelting process of a side-blown furnace, the materials melt and burn insufficiently, generating CO gas. The CO gas will accumulate at the top of the side-blown furnace, making it prone to flash explosion. Even later, a part of the CO gas will enter the dust collection system, where it is easy to generate electric sparks in the electric dust collector and wet electric demister of the subsequent dust collection system, and it is easy to explode. The existing treatment method for the insufficient combustion of materials in the side-blown furnace, resulting in the accumulation of CO, is to add a primary air inlet at the upper part of the side-blown furnace body. The blower blows air into the primary air inlet, and the air reacts with CO to generate CO2, thereby reducing the risk of CO accumulation and explosion. However, the air blown in this way is cold air, which has a greater impact on the service life of the refractory material of the side-blown furnace body. At the same time, the air distribution is uneven, so there are certain limitations. Therefore, there is an urgent need for an air inlet device for the top of a side-blown furnace to solve the above problems. Summary of the Utility Model
[0003] In order to solve the technical problems that cold air has a greater impact on the service life of the refractory material of the side-blown furnace and there is uneven air distribution, the utility model provides an air inlet device for the top of a side-blown furnace. The air is evenly discharged, effectively reducing the risk of CO accumulation and explosion in the side-blown furnace. Air is introduced into the air jacket for cooling, and at the same time, the air is heated. Moreover, the heated air blown into the furnace chamber of the furnace body has little impact on the refractory material of the side-blown furnace body.
[0004] The utility model provides an air inlet device for the top of a side-blown furnace, which includes a blower arranged outside the side-blown furnace body. The air inlet device for the top of the side-blown furnace further includes an air inlet structure. The air inlet structure includes an air jacket and a blast pipe group. There is a furnace mouth at the top of the side-blown furnace body. The blast pipe group is arranged at the furnace mouth. One end of the blast pipe group and the blower are both fixedly connected to the air jacket. The other end of the blast pipe group is located inside the side-blown furnace body. There is a smoke outlet on the side-blown furnace body, and the smoke outlet is located at the lower side of the other end of the blast pipe group.
[0005] Furthermore, the blast air duct group includes a plurality of blast air ducts. One ends of the plurality of blast air ducts are uniformly arranged on the air jacket. A heat insulation casting layer is arranged in the middle of the plurality of blast air ducts. The heat insulation casting layer is fixedly connected at the furnace mouth and contacts the air jacket. The other ends of the plurality of blast air ducts are located inside the furnace body of the side-blown furnace. The smoke outlet is located at the lower side of the other ends of the plurality of blast air ducts. When the blower is started, the blower blows air into the air jacket through the first pipeline. The air flows in the air jacket to cool the air jacket. At the same time, the air is heated and moisture is dissipated. The heated air uniformly enters the upper part of the furnace chamber of the furnace body through the plurality of blast air ducts. O2 in the air uniformly contacts the CO gas accumulated in the upper part of the furnace chamber of the furnace body. At high temperature, more sufficient secondary combustion occurs to generate CO2, which is discharged from the smoke outlet.
[0006] Furthermore, a plurality of flow guiding protrusions are uniformly arranged on the inner wall of each blast air duct. The end of each blast air duct located inside the furnace body of the side-blown furnace is set in a flared shape. The arrangement of the flow guiding protrusions further facilitates the uniform air outlet of the blast air duct. And the end of the blast air duct is set in a flared shape, which increases the contact area between O2 in the air and the accumulated CO in the upper part of the furnace chamber of the furnace body while increasing the air outlet volume.
[0007] Furthermore, a separation net is arranged inside the end of each blast air duct located inside the furnace body of the side-blown furnace. The separation net effectively prevents the ash and slag generated during the operation of the side-blown furnace from entering the inside of the blast air duct and affecting the uniform air outlet of the blast air duct.
[0008] Furthermore, the side-blown furnace top air inlet device further includes a slag removal box arranged outside the furnace body of the side-blown furnace. A cleaning component is arranged inside the slag removal box. The slag removal box is provided with a first opening and a second opening. The first opening is fixedly connected to the air inlet pipeline, and a pump body is arranged on the air inlet pipeline. The air inlet of the blower is fixedly connected to the second opening through a second pipeline. When the pump body is started, external air enters the slag removal box through the air inlet pipeline and the first opening. The cleaning component in the slag removal box removes impurities from the air. Then the air after impurity removal enters the blower through the second opening and the second pipeline.
[0009] Furthermore, the cleaning component includes a multi-stage sieve plate arranged at intervals inside the slag removal box and located between the first opening and the second opening. External air enters the inside of the slag removal box through the air inlet pipeline and the first opening. Then the air is purified through the multi-stage sieve plate. Finally, the air enters the blower through the second opening and the second pipeline.
[0010] Compared with the prior art, the utility model has the following technical effects:
[0011] A wind jacket and a blast air pipe group are provided. Air is blown into the wind jacket by a blower to cool the wind jacket. At the same time, the air is heated in the wind jacket. The blast air pipe group evenly blows the heated air into the upper part of the furnace chamber of the furnace body. As a result, CO accumulated in the upper part of the furnace chamber of the furnace body undergoes secondary combustion with O2 in the air to generate CO2, and the CO2 finally discharges from the smoke outlet, effectively reducing the risk of CO accumulation explosion inside the side-blown furnace. Air is introduced into the wind jacket for cooling, and at the same time, the air is heated. The heated air blown into the furnace chamber of the furnace body has little impact on the refractory materials of the side-blown furnace body. Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of an air inlet device at the top of a side-blown furnace of the present utility model;
[0013] Figure 2 is a schematic structural diagram of the blast air pipe of the present utility model;
[0014] Figure 3 is a schematic cross-sectional structural diagram of the slag removal box of the present utility model;
[0015] The reference numerals in the drawings are:
[0016] 1. Side-blown furnace; 11. Smoke outlet; 12. Feeding pipeline; 13. Oxygen lance opening; 14. Slag discharge opening; 15. Lead discharge opening; 2. Blower; 21. First pipeline; 22. Second pipeline; 3. Wind jacket; 4. Blast air pipe group; 41. Blast air pipe; 411. Flow guiding protrusion; 412. Isolation net; 5. Heat insulation casting layer; 6. Slag removal box; 61. Sieve plate. Detailed Embodiments
[0017] The present utility model will be further described below in conjunction with the drawings and detailed embodiments.
[0018] As Figures 1 to 3 shown, an air inlet device at the top of a side-blown furnace includes a blower 2 arranged outside the furnace body of the side-blown furnace 1. The air inlet device at the top of the side-blown furnace further includes an air inlet structure. The air inlet structure includes a wind jacket 3 provided with a pipe orifice and a blast air pipe group 4. The air outlet of the blower 2 is fixedly connected to the pipe orifice through a first pipeline 21. A furnace opening is provided at the top of the furnace body of the side-blown furnace 1. The blast air pipe group 4 is arranged at the furnace opening. One end of the blast air pipe group 4 is fixedly connected to the wind jacket 3, and the other end of the blast air pipe group 4 is located inside the furnace body of the side-blown furnace 1. A smoke outlet 11 is provided on the furnace body of the side-blown furnace 1, and the smoke outlet 11 is located at the lower side of the other end of the blast air pipe group 4. Among them, the blower 2 can be installed together with the side-blown furnace 1 at the working site. The air outlet of the blower 2 is connected to the pipe orifice of the wind jacket 3 through the first pipeline 21, so that the air can evenly cover the upper part of the furnace body through the blast air pipe group 4, and the blast air pipe group 4 makes the air evenly discharge.
[0019] For the side-blown furnace top air inlet device of this embodiment, when the side-blown furnace 1 is operating, its own heat will be conducted to the air duct group 4 and the air jacket 3, causing the air jacket 3 to have a high temperature. The air jacket 3 and the air duct group 4 are provided. The air is blown into the air jacket 3 by the blower 2 to cool the air jacket 3. At the same time, the air is heated in the air jacket 3. The air duct group 4 evenly blows the heated air into the upper part of the furnace chamber of the furnace body, so that the CO gathered in the upper part of the furnace chamber of the furnace body undergoes secondary combustion with the O2 in the air to generate CO2, and the CO2 finally discharges from the smoke outlet 11, effectively reducing the risk of CO accumulation explosion in the side-blown furnace 1. And air is introduced into the air jacket 3 for cooling, and at the same time the air is heated (the moisture in the air evaporates in the air jacket 3). The heated air (dry air) is blown into the furnace chamber of the furnace body, which has little impact on the refractory material of the furnace body of the side-blown furnace 1. The cheapness of air also reduces the production cost and achieves energy conservation and consumption reduction.
[0020] The side-blown furnace top air inlet device of this embodiment has a simple structure. Compared with the traditional method of adding a primary air inlet at the upper part of the furnace body to blow in cold air, the air can be evenly discharged, and the furnace body effectively reduces the risk of CO accumulation explosion in the side-blown furnace 1, has a high efficiency of removing CO, air is introduced into the air jacket 3 for cooling, and at the same time the air is heated, and the heated air is blown into the furnace chamber of the furnace body, which has little impact on the refractory material of the furnace body of the side-blown furnace 1, improving the safety factor of the equipment. At the same time, it has the advantages of low production cost and low construction cost.
[0021] As an implementable mode, the blast pipe group 4 includes a plurality of blast pipes 41. One ends of the plurality of blast pipes 41 are arranged on the air jacket 3. A heat insulation casting layer 5 is arranged in the middle of the plurality of blast pipes 41. The heat insulation casting layer 5 is fixedly connected at the furnace mouth and the heat insulation casting layer 5 contacts the air jacket 3. The other ends of the plurality of blast pipes 41 are located inside the furnace body of the side-blown furnace 1. The smoke outlet 11 is located at the lower side of the other ends of the plurality of blast pipes 41. Among them, the materials of the air jacket 3 and the blast pipes 41 are boiler plates. The length of the blast pipe 41 is slightly greater than the thickness of the heat insulation casting layer 5. The plurality of blast pipes 41 provide support points for the heat insulation casting layer 5, and the plurality of blast pipes 41 play a role in fixing the heat insulation casting layer 5 to ensure that the heat insulation casting layer 5 does not fall off. At the same time, the heat insulation casting layer 5 provides heat insulation protection for both the air jacket 3 and the blast pipes 41. The air jacket 3 and the heat insulation casting layer 5 can also exchange heat, thereby improving the service lives of the heat insulation casting layer 5, the air jacket 3 and the blast pipes 41. When the side-blown furnace 1 is working, its own heat will be conducted to the blast pipes 41 and the air jacket 3, making the air jacket 3 have a high temperature. The heat insulation casting layer 5 plays a role in protecting the air jacket 3 from heat insulation and preventing the temperature of the air jacket 3 from being too high. Air can enter the furnace chamber of the furnace body through the inside of the blast pipe 41. The plurality of blast pipes 41 are uniformly fixedly connected to the air jacket 3. Therefore, the plurality of blast pipes 41 can blow air evenly and cover the upper part of the furnace chamber of the furnace body. So the contact surface between O2 in the air and CO accumulated in the upper part of the furnace chamber of the furnace body is wider, and the subsequent secondary combustion of O2 and CO is more sufficient.
[0022] Start the blower 2. The blower 2 blows air into the air jacket 3 through the first pipe 21. The air flows in the air jacket 3 to cool the air jacket 3. At the same time, the air is heated and loses moisture. The heated air uniformly enters the upper part of the furnace chamber of the furnace body through the plurality of blast pipes 41. O2 in the air uniformly contacts the CO gas accumulated in the upper part of the furnace chamber of the furnace body. At high temperature, more sufficient secondary combustion occurs to generate CO2, which is discharged from the smoke outlet 11, ensuring the safe operation of the side-blown furnace 1 and the subsequent dust collection system.
[0023] As an implementable mode, a plurality of flow guiding protrusions 411 are uniformly arranged on the inner wall of each blast pipe 41. The end of each blast pipe 41 located inside the furnace body of the side-blown furnace 1 is set in a flared shape. The setting of the flow guiding protrusions 411 further facilitates the uniform air outlet of the blast pipe 41. And the end of the blast pipe 41 is set in a flared shape, increasing the air outlet volume and at the same time increasing the contact surface between O2 in the air and CO accumulated in the upper part of the furnace chamber of the furnace body, so that more sufficient secondary combustion occurs to generate CO2 in the future, and the risk of CO accumulation and explosion in the furnace will be further reduced.
[0024] As an implementable mode, an isolation net 412 is arranged inside the end of each blast pipe 41 located inside the furnace body of the side-blown furnace 1. The isolation net 412 effectively prevents ash generated when the side-blown furnace 1 is working from entering the inside of the blast pipe 41 and affecting the uniform air outlet of the blast pipe 41.
[0025] As an implementable manner, the side-blowing furnace top air inlet device further includes a slag removal box 6 arranged outside the furnace body of the side-blowing furnace 1. A cleaning component is arranged inside the slag removal box 6. The slag removal box 6 is provided with a first opening and a second opening. The first opening is fixedly connected to the air inlet pipe, and a pump body is arranged on the air inlet pipe. The air inlet of the blower 2 is fixedly connected to the second opening through a second pipe 22. Among them, the slag removal box 6 can be installed together with the blower 2 and the side-blowing furnace 1 at the working site. Since the air may carry large particle impurities, in order to avoid the impurities from blocking the air jacket 3 and the air pipe group 4, the cleaning component in the slag removal box 6 first removes impurities from the air. Specifically, the pump body is started, and the external air enters the slag removal box 6 through the air inlet pipe and the first opening. The cleaning component in the slag removal box 6 removes impurities from the air. After that, the purified air enters the blower 2 through the second opening and the second pipe 22.
[0026] As an implementable manner, the cleaning component includes a multi-stage sieve plate 61 arranged at intervals inside the slag removal box 6 and located between the first opening and the second opening. The structure of the sieve plate 61 is prior art and will not be described in detail here. The external air enters the inside of the slag removal box 6 through the air inlet pipe and the first opening. After that, the air is purified by passing through the multi-stage sieve plate 61, and finally the air enters the blower 2 through the second opening and the second pipe 22.
[0027] As an implementable manner, an oxygen lance opening 13, a slag discharge opening 14 and a lead discharge opening 15 are sequentially arranged on the side-blowing furnace 1 below the smoke outlet 11; a feeding pipe 12 penetrates through the heat-insulating casting layer 5. The side-blowing furnace 1 (for lead smelting) includes a furnace body. Generally, the furnace body is basically designed to be cylindrical. The inside of the furnace body is a hearth. The upper part of the furnace body is provided with a smoke outlet 11, and the middle and lower parts are provided with an oxygen lance opening 13, a slag discharge opening 14 and a lead discharge opening 15. Among them, the oxygen lance opening 13 is higher than the slag discharge opening 14, and the oxygen lance is installed at the oxygen lance opening 13. The slag discharge opening 14 is higher than the lead discharge opening 15. External materials enter the hearth of the furnace body through the feeding pipe 12. The oxygen lance instantaneously provides heat for the side-blowing furnace 1. The lead and slag generated during the operation of the side-blowing furnace 1 are discharged through the lead discharge opening 15 and the slag discharge opening 14 respectively.
[0028] The above-described embodiments are only the preferred embodiments of the present invention, which are only used to explain the present invention and do not limit the scope of implementation of the present invention. For those skilled in the art of this technology, of course, other implementation manners can be easily made according to the technical content disclosed in this specification by means of replacement or change. Therefore, all changes and improvements made in the principles and process conditions of the present invention should be included within the scope of the patent application of the present invention.
Claims
1. A side-blowing furnace top air inlet device, comprising a blower (2) arranged outside the furnace body of the side-blowing furnace (1), characterized in that, The side-blown furnace top air inlet device further includes an air inlet structure, and the air inlet structure includes an air jacket (3) and a blast pipe group (4). There is a furnace mouth at the top of the furnace body of the side-blown furnace (1). The blast pipe group (4) is arranged at the furnace mouth. One end of the blast pipe group (4) and the blower (2) are both fixedly connected to the air jacket (3). The other end of the blast pipe group (4) is located inside the furnace body of the side-blown furnace (1). There is a smoke outlet (11) on the furnace body of the side-blown furnace (1), and the smoke outlet (11) is located at the lower side of the other end of the blast pipe group (4).
2. The side-blown furnace top air inlet device according to claim 1, characterized in that, The blast pipe group (4) includes a plurality of blast pipes (41). One ends of the plurality of blast pipes (41) are evenly arranged on the air jacket (3). There is a heat insulation casting layer (5) in the middle of the plurality of blast pipes (41). The heat insulation casting layer (5) is fixedly connected at the furnace mouth and the heat insulation casting layer (5) is in contact with the air jacket (3). The other ends of the plurality of blast pipes (41) are located inside the furnace body of the side-blown furnace (1). The smoke outlet (11) is located at the lower side of the other ends of the plurality of blast pipes (41).
3. The side-blowing furnace top air inlet device according to claim 2, characterized in that, A plurality of flow guiding protrusions (411) are evenly arranged on the inner wall of each blast pipe (41). The end of each blast pipe (41) located inside the furnace body of the side-blown furnace (1) is set in a flared shape.
4. The side-blown furnace top air inlet device according to claim 3, characterized in that, A separation net (412) is arranged inside the end of each blast pipe (41) located inside the furnace body of the side-blown furnace (1).
5. The side-blown furnace top air inlet device according to claim 1, characterized in that, The side-blown furnace top air inlet device further includes a slag removal box (6) arranged outside the furnace body of the side-blown furnace (1). A cleaning component is arranged inside the slag removal box (6). The slag removal box (6) is provided with a first opening and a second opening. The first opening is fixedly connected to an air inlet pipe and a pump body is arranged on the air inlet pipe. The air inlet of the blower (2) is fixedly connected to the second opening through a second pipe (22).
6. The side-blown furnace top air inlet device according to claim 5, characterized in that, The cleaning component includes a multi-stage sieve plate (61) arranged at intervals inside the slag removal box (6) and located between the first opening and the second opening.