Method for reducing negative pressure of side flame path of open-type carbon roasting furnace
By setting up channels at the side fire branch of the smoke exhaust tray to expand the cross-sectional area of the flue gas pipeline and adjusting the negative pressure, the problem of insufficient negative pressure on the side fire is solved, and more efficient temperature control and fuel combustion effect are achieved.
Patent Information
- Application Number
- CN202510432227.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-08-15
AI Technical Summary
The negative pressure of the fire channel at the edge of the existing open carbon roasting furnace is insufficient, resulting in the high-temperature flue gas in the heating furnace room cannot smoothly enter the heating channel of the preheating furnace room. The temperature of the fire channel of the preheating furnace room is lower than the curve, the fuel burns sufficiently, and the heating cannot keep up with the set curve.
The channel is set up at the side fire branch of the smoke exhaust rack to expand the cross-sectional area of the flue gas pipeline, and equipped with a regulating valve to adjust the appropriate negative pressure value to meet the heating needs.
Under the same negative pressure conditions of the main pipe, the negative pressure of the side fire channel branch pipe is increased, the heat channel temperature rise meets the requirements of the set curve, the temperature control accuracy is increased to ±30℃, the fuel is fully burned, and the heating effect is significantly improved.
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Figure CN120488775A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of carbon roasting furnaces, and in particular to a method for reducing the negative pressure of a side fire channel of an open carbon roasting furnace. Background Art
[0002] The open carbon roasting furnace is a key equipment for the heat treatment of aluminum anodes, cathodes and electrodes. The auxiliary main equipment is the combustion control system. Under air-tight conditions, the high-pressure formed carbon products (such as anodes and cathodes) are indirectly heated to 1250-1300°C at a set temperature to coke the binder (such as coal tar) and form a stable carbon coke grid. This process can eliminate volatiles, increase the density and mechanical strength of the product, and optimize the electrical conductivity. The roasting furnace is mainly used for indirect heating of high-pressure formed carbon products under air-tight conditions, with the aim of improving electrical and thermal conductivity and increasing strength. During the roasting process, the binder is coked, fixing the shape of the product and improving the physical and chemical properties.
[0003] Due to the inherent structure of the furnace, damage to the furnace body, thermal expansion and contraction, etc., the negative pressure of most roasting furnace side fire channels (1, n fire channels) cannot meet the fire channel heating needs. Summary of the Invention
[0004] The present invention aims to provide a method for reducing the negative pressure in the side flues of an open carbon roasting furnace. This method addresses the existing problem of insufficient negative pressure in the side flues, which prevents high-temperature flue gas from the heating chamber from flowing smoothly into the heating flues of the preheating chamber, causing the preheating flue temperature to fall below the set curve. Furthermore, the heating chamber lacks sufficient combustion-supporting air heated from the cooling chamber, hindering the fuel from fully burning and further preventing the temperature from rising to the set curve.
[0005] The invention discloses a method for reducing the negative pressure of a side fire channel of an open carbon roasting furnace. A side fire channel branch pipe of a smoke exhaust rack is provided with a channel, and the diameter of the channel is not less than the diameter of the side fire channel branch pipe.
[0006] Working principle: By setting up channels, the cross-sectional area of the flue gas duct of the side fire channel branch is expanded, thereby increasing the negative pressure of the side fire channel branch of the roasting furnace to meet the temperature increase requirements.
[0007] Furthermore, the channel diameter is 200-350 mm.
[0008] Furthermore, the channel is a bellows.
[0009] Furthermore, the channel is provided with a regulating valve.
[0010] By setting the regulating valve and adjusting the appropriate negative pressure value, the fire channel temperature rises to meet the curve requirements.
[0011] Furthermore, there are two side fire channel branches.
[0012] Furthermore, there is one channel, and the channel is located in any one of the two side fire channel branches.
[0013] By setting the channel position, the cross-sectional area of the flue gas duct of the side fire channel branch is expanded, thereby increasing the negative pressure of the side fire channel branch of the roasting furnace to meet the temperature increase requirements.
[0014] Furthermore, there are two channels.
[0015] Furthermore, the two channels are respectively located at the two side fire channel branches of the smoke exhaust rack.
[0016] By setting the channel position, the cross-sectional area of the flue gas duct of the side fire channel branch is expanded, thereby increasing the negative pressure of the side fire channel branch of the roasting furnace to meet the temperature increase requirements.
[0017] Furthermore, there are at least three channels.
[0018] Furthermore, there are three channels.
[0019] Furthermore, channels are provided upstream and downstream of one of the side fire channel branches.
[0020] By setting the channel position, the cross-sectional area of the flue gas duct of the side fire channel branch is expanded, thereby increasing the negative pressure of the side fire channel branch of the roasting furnace to meet the temperature increase requirements.
[0021] Furthermore, there are 4 channels.
[0022] Furthermore, channels are provided upstream and downstream of each of the side fire channel branches.
[0023] By setting the channel position, the cross-sectional area of the flue gas duct of the side fire channel branch is expanded, thereby increasing the negative pressure of the side fire channel branch of the roasting furnace to meet the temperature increase requirements.
[0024] Furthermore, the roasting furnace is connected to a combustion rack.
[0025] Furthermore, the roasting furnace is also connected to a blast rack and a cooling rack.
[0026] By connecting the blowing rack and cooling rack, it can be used for aluminum anodes.
[0027] An open carbon roasting furnace is used in the above method.
[0028] Compared with the prior art, the present invention has the following beneficial effects:
[0029] 1. By modifying the original smoke exhaust rack, under the same main pipe negative pressure conditions, the side fire channel branch pipe can be provided with a negative pressure n times higher than that of the original smoke exhaust rack.
[0030] 2. By setting the regulating valve, adjust the appropriate negative pressure value so that the fire channel temperature rises to meet the curve requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only represent some embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0032] Figure 1 This is a left-side structural schematic diagram of the smoke exhaust rack of the present invention.
[0033] Figure 2 This is a schematic structural diagram of the smoke exhaust rack of the present invention.
[0034] In the above drawings, the meanings of the various marks are: 1-side fire channel branch pipe, 2-channel, 3-combustion rack, 4-blast rack, 5-cooling rack. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.
[0036] Example 1
[0037] This embodiment discloses a method for reducing the negative pressure of the side channel of an open carbon roasting furnace. The specific structure is as follows: Figure 1-Figure 2 As shown, the following steps are included:
[0038] As needed, a channel 2 with an inner diameter similar to that of the dust collection branch pipe is added to one side of the original smoke exhaust rack's side fire channel branch pipe 1. This channel 2 is located in one of the two side fire channel branches 1 and is equipped with an adjustable valve to provide a flue gas channel with a cross-sectional area more than twice that of the original branch pipe. Under the same main pipe negative pressure conditions, this can provide a negative pressure twice that of the original smoke exhaust rack (the maximum negative pressure is increased from 60Pa to 120Pa) for each side fire channel branch pipe 1. By adjusting the valve, the appropriate negative pressure value is adjusted, so that the fire channel temperature rise meets the curve requirements.
[0039] Example 2
[0040] This example, as a preferred embodiment of the present invention, discloses a method for reducing the negative pressure of the side channel of an open carbon roasting furnace. The specific structure is as follows: Figure 1-Figure 2 As shown, the following steps are included:
[0041] Two channels 2 with an inner diameter similar to that of the dust collection branch pipe are added to one side of the original smoke exhaust rack's side fire duct branch pipe 1. These two channels 2 are located on the two side fire duct branches 1 of the smoke exhaust rack and are equipped with regulating valves to provide a flue gas channel with a cross-sectional area twice that of the original branch pipe. Under the same main pipe negative pressure conditions, the two side fire duct branches 1 can provide a negative pressure twice that of the original smoke exhaust rack (the maximum negative pressure is increased from 60Pa to 120Pa). By adjusting the valve, the appropriate negative pressure value is adjusted, so that the fire duct temperature rise meets the curve requirements.
[0042] Example 3
[0043] This example, as a preferred embodiment of the present invention, discloses a method for reducing the negative pressure of the side channel of an open carbon roasting furnace. The specific structure is as follows: Figure 1-Figure 2 As shown, the following steps are included:
[0044] Three channels 2 with the same inner diameter as the fire channel aperture are added on both sides of the side fire channel branch pipe 1 of the original smoke exhaust rack. Channels 2 are set upstream and downstream of one of the side fire channel branches 1, and are accompanied by regulating valves to provide a smoke channel with a cross-sectional area twice that of the original branch pipe. Under the same main pipe negative pressure conditions, the two side fire channel branches 1 can be provided with a negative pressure twice as high as that of the original smoke exhaust rack (the maximum negative pressure is increased from 60Pa to 180Pa). By adjusting the valve, the appropriate negative pressure value is adjusted so that the fire channel temperature rises to meet the curve requirements.
[0045] Example 4
[0046] This example, as a preferred embodiment of the present invention, discloses a method for reducing the negative pressure of the side channel of an open carbon roasting furnace. The specific structure is as follows: Figure 1-Figure 2 As shown, the following steps are included:
[0047] Four channels 2 with the same inner diameter as the fire channel aperture are added on both sides of the side fire channel branch pipe 1 of the original smoke exhaust rack. A channel 2 is provided upstream and downstream of each side fire channel branch pipe 1, and an adjusting valve is attached to provide a smoke channel with a cross-sectional area twice that of the original branch pipe. Under the same main pipe negative pressure conditions, the two side fire channel branches 1 can be provided with a negative pressure twice as high as that of the original smoke exhaust rack (the maximum negative pressure is increased from 60Pa to 180Pa). By adjusting the valve, the appropriate negative pressure value is adjusted so that the fire channel temperature rises to meet the curve requirements.
[0048] Example 5
[0049] This example, as a preferred embodiment of the present invention, discloses a method for reducing the negative pressure of the side channel of an open carbon roasting furnace. The specific structure is as follows: Figure 1-Figure 2 As shown, the following steps are included:
[0050] On the basis of Example 4, a combustion rack 3 is connected to the roasting furnace.
[0051] Example 6
[0052] This example, as a preferred embodiment of the present invention, discloses a method for reducing the negative pressure of the side channel of an open carbon roasting furnace. The specific structure is as follows: Figure 1-Figure 2 As shown, the following steps are included:
[0053] On the basis of Example 5, the roasting furnace is further connected to a blast rack 4 and a cooling rack 5.
[0054] By connecting the blowing rack 4 and the cooling rack 5, it can be used for aluminum anodes.
[0055] Temperature control effect
[0056] On the basis of Examples 1-4, the temperature difference of the flue of a certain factory's roasting furnace was reduced from the original 210°C to 10°C, reaching the control standard of ±30°C between the flue temperature and the set target temperature curve.
[0057] As can be seen from Examples 1-4, after adopting this technology, with other conditions remaining unchanged, the maximum negative pressure in the two side fire channel branches 1 increased by 2 times. By adjusting the valves to the appropriate negative pressure value, the fire channel temperature rise met the curve requirements. The temperature difference in the side fire channel was reduced from 210°C to 10°C.
[0058] The above are the implementation methods listed in this embodiment, but this embodiment is not limited to the above optional implementation methods. Those skilled in the art can arbitrarily combine the above methods to obtain other various implementation methods. Anyone can derive other various forms of implementation methods based on the inspiration of this embodiment. The above specific implementation methods should not be understood as limiting the scope of protection of this embodiment. The scope of protection of this embodiment shall be based on the definition in the claims, and the description can be used to interpret the claims.
Claims
1. A method for reducing the negative pressure of an open carbon roasting furnace, characterized in that: The following steps are involved: The side fire channel branch pipe (1) of the smoke exhaust rack is provided with a channel (2), and the diameter of the channel (2) is not less than the diameter of the side fire channel branch pipe (1).
2. The method for reducing negative pressure in an open carbon roasting furnace according to claim 1, wherein: The diameter of the channel (2) is 200-350 mm.
3. The method for reducing negative pressure in an open carbon roasting furnace according to claim 1, wherein: The channel (2) is a bellows.
4. The method for reducing negative pressure in an open carbon roasting furnace according to claim 1, wherein: The channel (2) is provided with a regulating valve.
5. The method for reducing negative pressure in an open carbon roasting furnace according to claim 1, characterized in that: There is one channel (2), and the channel (2) is located in any one of the two side fire channel branches (1).
6. The method for reducing negative pressure in an open carbon roasting furnace according to claim 1, wherein: There are two channels (2).
7. The method for reducing negative pressure in an open carbon roasting furnace according to claim 6, characterized in that: There are at least three channels (2).
8. The method for reducing negative pressure in an open carbon roasting furnace according to claim 1, characterized in that: The roasting furnace is connected with a combustion rack (3).
9. The method for reducing negative pressure in an open carbon roasting furnace according to claim 8, characterized in that: The roasting furnace is also connected to a blast rack (4) and a cooling rack (5).
10. An open carbon roasting furnace, characterized in that: The method is used in a method for reducing negative pressure in a side flue of an open carbon roasting furnace as described in any one of claims 1 to 9.