Communication flue of prebaked anode roasting furnace
By placing refractory bricks in the connecting flue of the pre-baked anode roasting furnace and using an arc-shaped structure, the problem of out-of-control temperature of the side fire channel is solved, and the temperature of the side fire channel and the intermediate fire channel is achieved, extending the service life of the roasting furnace and reducing the use of natural gas.
Patent Information
- Application Number
- CN202422153552.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-03
AI Technical Summary
When the existing 54-chamber open ring roasting furnace is connected to the flue, it cannot effectively control the negative pressure and flue gas flow of the side fire channel, resulting in the out-of-control temperature of the fire channel. The temperature of the side fire channel is about 200℃ lower than that of the middle fire channel, affecting the product quality and shortening the service life of the roasting furnace.
A pre-baked anode roasting furnace is designed to connect the flue. By placing refractory bricks at the upstream and downstream fire wellheads, and using an arc-shaped structure to connect the flue, the negative pressure and flue gas flow of the side fire channel are increased to ensure that the temperature is flush with the intermediate fire channel.
It effectively solves the problem of low temperature on the side fire channel, eliminates the internal stress caused by the temperature difference of refractory bricks, improves the service life of the roasting furnace, and reduces the use of natural gas, significantly improving economic benefits.
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Figure CN222964449U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of open roasting furnaces for pre-baked anode production, and particularly relates to a connecting flue for a pre-baked anode roasting furnace. Background Art
[0002] The main raw materials for the production of pre-baked anodes for aluminum are petroleum coke and pitch. After a series of processes such as calcination, crushing, screening, batching, kneading, forming, and roasting, qualified pre-baked anodes are produced. The existing flue wall structure of the 54-chamber open annular roasting furnace has defects. When the straight furnace chamber is operating, the flue temperature can be controlled by adjusting the single-flue electric valve of the smoke exhaust rack. When the combustion system runs to the connecting flue, since the cross-sectional areas of the negative pressure channels at the inlet and outlet of the connecting flue are the same, in the connecting flue, the flue gases of each flue are combined into one channel. At this time, the branch pipe of the smoke exhaust rack cannot control the negative pressure and flue gas flow of the corresponding flue, and it is difficult to control the flue temperature. At the same time, affected by less volatile matter in the preheating zone of the side flue, when the combustion system operates, it is necessary to transfer the heat in the heating zone through a large negative pressure. Affected by the combination of flue gases in the connecting flue, the negative pressure and flue gas flow of the side flue cannot be controlled, and the flue temperature is out of control. The negative pressure of the side flue is almost the same as that of the middle flue, resulting in the temperature of the side flue being about 200 °C lower than that of the middle flue. In the later stage, only by using a large amount of fuel (natural gas) for heating can the temperature be increased, and the temperature increase is difficult, and the product quality cannot be guaranteed. In this operating state, due to the large temperature difference between the side flue and the adjacent flue, the long-term operation causes different internal stresses in the refractory bricks of the furnace chamber of the roasting furnace, the furnace chamber is deformed, and the service life of the roasting furnace is shortened.
[0003] The above information disclosed in the background art section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a connecting flue for a pre-baked anode roasting furnace, which reduces the temperature difference between the side flue and the adjacent flue, and eliminates the internal stress generated by the temperature difference in the refractory bricks between the side flue and the middle flue of the roasting furnace.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A connecting flue for a pre-baked anode roasting furnace of the utility model includes:
[0007] An upstream furnace chamber, which includes a row of 53 furnace chambers and 54 furnace chambers arranged side by side. The 53 furnace chambers and 54 furnace chambers have multiple side flues, middle flues and multiple upstream fire wells arranged in rows;
[0008] A downstream furnace chamber, which includes a first furnace chamber and a second furnace chamber arranged side by side. The first furnace chamber and the second furnace chamber have a plurality of side flues, intermediate flues, and a plurality of downstream flue openings arranged in rows;
[0009] A smoke exhaust rack, which is located at the downstream flue opening. The smoke exhaust rack has a branch pipe connecting the downstream flue opening,
[0010] A connecting flue, which connects the upstream flue opening on the side of the upstream furnace chamber close to the connecting flue and the branch pipe;
[0011] Refractory bricks, which are placed in the upstream flue opening on the side of the upstream furnace chamber close to the connecting flue and in the downstream flue openings of the intermediate flues connecting the branch pipes.
[0012] In the connecting flue of the pre-baked anode baking furnace described above, the connecting flue is a turning furnace chamber.
[0013] In the connecting flue of the pre-baked anode baking furnace described above, the first furnace chamber and the second furnace chamber are arranged with nine rows of downstream flue openings in the height direction.
[0014] In the connecting flue of the pre-baked anode baking furnace described above, the refractory bricks are placed in the downstream flue openings of the second to eighth rows connecting the branch pipes.
[0015] In the connecting flue of the pre-baked anode baking furnace described above, the cross-section of the connecting flue is an arc structure.
[0016] In the connecting flue of the pre-baked anode baking furnace described above, the refractory bricks are inclined and placed in the upstream flue opening on the side of the upstream furnace chamber close to the connecting flue and in the downstream flue openings of the intermediate flues connecting the branch pipes.
[0017] In the connecting flue of the pre-baked anode baking furnace described above, both the upstream flue opening and the downstream flue opening are rectangular structures.
[0018] In the connecting flue of the pre-baked anode baking furnace described above, the rectangular structure is a square structure.
[0019] In the connecting flue of the pre-baked anode baking furnace described above, the side flue communicates with the intermediate flue.
[0020] In the connecting flue of the pre-baked anode baking furnace described above, the connecting flue of the pre-baked anode baking furnace is a symmetric structure.
[0021] In the above technical solution, a connecting flue for a pre-baked anode baking furnace provided by the present utility model has the following beneficial effects: When the combustion system of the pre-baked anode baking furnace passes through the connecting flue (bending furnace chamber), under the condition that the negative pressure of the main pipe remains unchanged, the negative pressure of the side flue is increased, and accordingly, the flue gas flow rate and heat in the side flue are increased, ensuring the temperature of the side flue, so that the volatilization time of the side flue is the same as that of the middle flue, and the temperatures of the side flue and the middle flue are level. Placing a refractory brick with regular dimensions at the fire well effectively increases the flue gas volume and negative pressure of the side flue, solves the problem of low temperature in the side flue, eliminates the internal stress generated by the temperature difference between the refractory bricks in the side flue and the middle flue of the baking furnace, and improves the service life of the baking furnace. At the same time, the natural gas consumption in the side flue is greatly reduced, and the specific natural gas consumption is reduced by more than 1m 3 / t, and the economic benefits are remarkable. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.
[0023] Figure 1 It is a schematic structural diagram of the connecting flue of the pre-baked anode baking furnace of the present utility model.
[0024] Figure 2 It is Figure 1 a schematic cross-sectional view A-A of the connecting flue of the pre-baked anode baking furnace of the present utility model.
[0025] Figure 3 It is Figure 1 a schematic cross-sectional view B-B of the connecting flue of the pre-baked anode baking furnace of the present utility model.
[0026] The reference numerals in the drawings are as follows: Wusan furnace chamber 1, Second furnace chamber 2, First furnace chamber 3, Side flue 4, Downstream fire well 5, Connecting flue 6, Middle flue 7, Upstream fire well 8, Wusi furnace chamber 9, Refractory brick 10. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0028] Accordingly, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the scope of protection of the present utility model.
[0029] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and 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 thus should not be construed as a limitation of the present utility model.
[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.
[0032] In the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between 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.
[0033] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.
[0034] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0035] As Figures 1-3 shown, in one embodiment, a connecting flue of a pre-baked anode baking furnace of the present utility model includes
[0036] an upstream furnace chamber, which includes a row of five-three furnace chambers 1 and five-four furnace chambers 9 arranged side by side. The five-three furnace chambers 1 and five-four furnace chambers 9 have a plurality of side flues 4, middle flues 7, and a plurality of upstream fire wellheads 8 arranged in rows;
[0037] a downstream furnace chamber, which includes a row of first furnace chambers 3 and second furnace chambers 2 arranged side by side. The first furnace chambers 3 and second furnace chambers 2 have a plurality of side flues 4, middle flues 7, and a plurality of downstream fire wellheads 5 arranged in rows;
[0038] a smoke exhaust rack, which is located at the downstream fire wellhead 5. The smoke exhaust rack has a branch pipe connecting the downstream fire wellhead 5,
[0039] a connecting flue 6, which connects the upstream fire wellhead 8 on the side of the upstream furnace chamber close to the connecting flue 6 and connects to the branch pipe;
[0040] refractory bricks 10, which are placed in the upstream fire wellhead 8 on the side of the upstream furnace chamber close to the connecting flue 6 and in the downstream fire wellhead 5 of the middle flue 7 connecting the branch pipe.
[0041] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace, the connecting flue is a turning furnace chamber.
[0042] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace, the first furnace chambers 3 and second furnace chambers 2 are arranged with nine rows of downstream fire wellheads 5 in the height direction.
[0043] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace, the refractory bricks are placed in the second to eighth rows of downstream fire wellheads 5 connecting the branch pipe.
[0044] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace described above, the cross-section of the connecting flue is an arc structure.
[0045] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace described above, the refractory bricks are inclined and placed in the upstream fire well 8 on the side of the upstream furnace chamber close to the connecting flue 6 and in the downstream fire well 5 of the intermediate flue 7 connecting the branch pipes.
[0046] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace described above, both the upstream fire well 8 and the downstream fire well 5 are rectangular structures.
[0047] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace described above, the rectangular structure is a square structure.
[0048] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace described above, the side flue 4 communicates with the intermediate flue 7.
[0049] In a preferred embodiment of the connecting flue of the pre-baked anode baking furnace described above, the connecting flue of the pre-baked anode baking furnace is a symmetric structure.
[0050] In one embodiment, when the combustion system operates to the connecting flue 6, that is, the turning furnace chamber, the exhaust smoke rack is located at the fire wells of the first furnace chamber 3 and the second furnace chamber 2. At this time, the 9 branch pipes of the exhaust smoke rack communicate with the connecting flue 6, and the side flue 4 communicates with the intermediate flue 7. It is impossible to control the flue negative pressure and flue gas flow rate of the upstream furnace chambers 9 and 5 through adjusting the butterfly valves of the branch pipes of the exhaust smoke rack. One refractory brick is respectively placed in the 2nd, 3rd, 4th, 5th, 6th, 7th, and 8th fire wells of the upstream fire well 8 of the connecting flue 6 and the downstream fire well 5 of the connecting flue 6 to reduce the negative pressure of the intermediate flue 7. Under the condition that the total negative pressure remains unchanged, the negative pressure of the side flue 4 increases by about 40 Pa, and then the temperatures of the side flue 4 and the intermediate flue 7 are leveled. The problems that it is difficult to control the negative pressure, flue gas flow rate, and temperature of the combustion system passing through the connecting flue 6, and the negative pressure and flue gas flow rate of the side flue 4 are insufficient and the temperature is out of control are solved. Through the improvement, the above problems are solved, and at the same time, the natural gas consumption of the anode is reduced, the service life of the baking furnace is improved, and the economic benefit is remarkable.
[0051] Finally, it should be noted that: the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative efforts belong to the scope protected by the present application.
[0052] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.
Claims
1. A pre-baked anode baking furnace connected to a flue, characterized in that: These include, The upstream furnace chamber includes a 53 furnace chamber and a 54 furnace chamber arranged side by side, wherein the 53 furnace chamber and the 54 furnace chamber have a plurality of side fire channels, a middle fire channel and a plurality of upstream fire well openings in a row; A downstream furnace chamber, comprising a first furnace chamber and a second furnace chamber arranged side by side, wherein the first furnace chamber and the second furnace chamber have a plurality of side fire channels, a middle fire channel and a plurality of downstream fire wellheads arranged in a row; A smoke exhaust rack is located at the downstream fire well mouth, and the smoke exhaust rack has a branch pipe connected to the downstream fire well mouth, A connecting flue, which is connected to an upstream fire well mouth of an upstream furnace chamber close to a side of the connecting flue and is connected to the branch pipe; Refractory bricks are placed in the upstream fire well mouth of the upstream furnace chamber close to the flue and in the downstream fire well mouth of the middle fire channel connected to the branch pipe.
2. A flue connected to a prebaked anode baking furnace according to claim 1, characterized in that: The connecting flue is a curved furnace chamber.
3. The flue connected to the prebaked anode baking furnace according to claim 1, characterized in that: The first furnace chamber and the second furnace chamber are arranged with nine rows of downstream fire wellheads in the height direction.
4. A flue connected to a prebaked anode baking furnace according to claim 3, characterized in that: The refractory bricks are placed in the downstream fire wellheads of the second to eighth rows connected to the branch pipes.
5. The flue connected to the prebaked anode baking furnace according to claim 1, characterized in that: The cross section of the connecting flue is an arc-shaped structure.
6. The flue connected to the prebaked anode baking furnace according to claim 1, characterized in that: The refractory bricks are placed obliquely in the upstream fire well mouth of the upstream furnace chamber close to the flue and in the downstream fire well mouth of the middle fire channel connected to the branch pipe.
7. The flue connected to the prebaked anode baking furnace according to claim 1, characterized in that: The upstream fire well mouth and the downstream fire well mouth are both rectangular structures.
8. The flue connected to the prebaked anode baking furnace according to claim 7, characterized in that: The rectangular structure is a square structure.
9. The flue connected to the prebaked anode baking furnace according to claim 1, characterized in that: The side fire channel is communicated with the middle fire channel.
10. The flue connected to the prebaked anode baking furnace according to claim 1, characterized in that: The pre-baked anode baking furnace connected to the flue is a symmetrical structure.