First-layer flame path structure of calcining furnace
By installing support and isolation components in the first-layer flue of the calcining furnace, the volatiles are isolated from the air inlet, promoting uniform combustion of the volatiles in the flue. This solves the problem of incomplete combustion of volatiles, achieves uniform temperature distribution and stable operating conditions, reduces fan power, and achieves energy-saving effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-03-06
AI Technical Summary
The flue gas at the volatile matter outlet of the first layer of the calcining furnace is turbid and swirling. Uneven negative pressure leads to incomplete combustion of volatile matter, resulting in excessively high temperature at the bottom of the furnace. It is necessary to increase the power of the blower to remove the flue gas, but the large negative pressure affects the combustion of volatile matter, resulting in unstable operating conditions.
Supporting and isolating components are installed inside the fire channel to isolate the volatile matter inlet from the air inlet. Negative pressure is used to move the volatile matter along the direction of the fire channel and mix it with the air in the middle position for combustion, avoiding swirling airflow and promoting uniform combustion.
This achieves a uniform temperature distribution in the calcining furnace, stabilizes operating conditions, reduces the fan output frequency, and thus achieves energy-saving effects.
Smart Images
Figure CN223976443U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of calcining furnace fire channel structure, and in particular to a first-layer fire channel structure for a calcining furnace. Background Technology
[0002] A pot-type calcining furnace is a thermal device that indirectly heats carbon materials within a fixed pot to complete the calcination process. It is a widely used furnace type in the carbon industry. During calcination, petroleum coke is added to the pot through a top-feeding device. As the petroleum coke moves downwards, it is gradually heated by the flues located on both sides of the pot. The heat generated by the combustion of volatiles in the flues is indirectly transferred to the raw material through the flue walls. When the temperature of the petroleum coke reaches 350–600°C, a large amount of volatiles are released, collected through the volatile matter channel, and sent back to the flues for combustion. The combustion of volatiles is a heat source for the pot-type calcining furnace. After undergoing a series of physicochemical changes at a high temperature of 1200–1350°C, the raw material enters a water jacket for cooling from the bottom of the pot and is finally discharged by the discharge device. Pot-type calcining furnaces are divided into co-current and counter-current types. The co-current type is adopted by most carbon enterprises because of its relatively simple structure. With the development of refractory material technology and the carbon industry, as well as investors' control over construction costs, the original 16-pot, 6-channel furnace type of pot-type calcining furnace has been developed into a large furnace with a maximum of 120 pots and 10 channels.
[0003] The flue gas at the volatile matter outlet of the first-layer flue of the calcining furnace is turbid and swirling. The negative pressure in front of the furnace in the first-layer flue is equal to or higher than that behind the furnace, which does not conform to the normal rule that the negative pressure at the far end is lower. It is necessary to increase the fan power to provide sufficient negative pressure to draw away the flue gas. However, the large negative pressure will cause the volatile matter to not burn completely in the first-layer flue. The unburned volatile matter will migrate to the lower layer for combustion, resulting in a high temperature in the bottom flue of the calcining furnace, which may even exceed the temperature of the first-layer flue, and thus cause the furnace bottom plate to turn red. Utility Model Content
[0004] In view of this, the present invention provides a first-layer fire channel structure for a calcining furnace, the main purpose of which is to provide a first-layer fire channel structure for a calcining furnace that makes the calcination temperature zone distribution more uniform and reasonable.
[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:
[0006] This utility model embodiment provides a first-layer fire channel structure for a calcining furnace, including:
[0007] A fire channel component, comprising a fire channel body, a volatile matter inlet at the upper part of the fire channel body, a regulating valve at one end of the fire channel body, and an air inlet on one side of the fire channel body;
[0008] An isolation component, comprising a support component and a partition component, is longitudinally disposed within the fire duct body. The isolation component has a first opening, which is coaxial with the air inlet. The partition component is disposed on the upper part of the isolation component.
[0009] Furthermore, the air inlet is located on the lower side of the volatile matter inlet, and one end of the separator extends directly below the volatile matter inlet.
[0010] Furthermore, the fire channel body includes a first side wall, a second side wall, a first bottom wall, and a first top wall. The first side wall and the second side wall are arranged opposite to each other. The first top wall is arranged on the upper part of the first side wall and the second side wall, and the first bottom wall is arranged on the lower part of the first side wall and the second side wall. The volatile matter inlet is arranged on the first top wall, and the air inlet is arranged on the first side wall.
[0011] Furthermore, the supporting component includes a first supporting plate, a second supporting plate, and a third supporting plate. The first supporting plate and the second supporting plate are attached to the first sidewall. The first supporting plate and the second supporting plate are disposed on both sides of the air inlet. The separating component, the first supporting plate, the second supporting plate, and the first bottom wall form the first opening. The third supporting plate is attached to the second sidewall.
[0012] Furthermore, the lower parts of both sides of the separating component are fixedly connected to the first support plate, the second support plate, and the third support plate, respectively.
[0013] Furthermore, one end face of the separating component is flush with the end face of the third support plate, and the projected position of the separating component covers the volatile matter inlet.
[0014] Furthermore, the second support plate, the third support plate, the bottom wall, and the partition member form the second opening.
[0015] Furthermore, an observation port component is provided at the other end of the fire channel body.
[0016] Furthermore, a lower fire port is provided at the end of the first bottom wall away from the regulating door.
[0017] Compared with the prior art, the present invention has the following technical effects:
[0018] In the technical solution provided by this utility model embodiment, the function of the fire channel component is to provide a place for the combustion of volatiles. The fire channel component includes a fire channel body, with a volatiles inlet at the upper part of the fire channel body, a regulating door at one end of the fire channel body, and an air inlet on one side of the fire channel body. The function of the isolation component is to separate the volatiles inlet and the air inlet. The isolation component includes a supporting component and a separating component. The isolation component is longitudinally arranged in the fire channel body and has a first opening. The first opening is located on the same axis as the air inlet. The separating component is located at the upper part of the isolation component. Compared with the prior art, the flue gas at the volatiles outlet of the first layer fire channel of the calcining furnace is turbid and swirling. The negative pressure in front of the furnace in the first layer fire channel is equal to or higher than that behind the furnace, which does not conform to the normal rule that the negative pressure is lower at the far end. It is necessary to increase the fan power to provide sufficient negative pressure to draw away the flue gas. However, a large negative pressure will prevent the volatiles from being burned in the first layer. In a calcining furnace, combustion is not fully complete within the combustion chamber. Unburned volatiles migrate to lower layers for combustion, resulting in high temperatures in the bottom combustion chamber, sometimes exceeding those of the first layer. This causes the furnace bottom plate to glow red-hot. This technical solution addresses this by installing a support component on the side of the air inlet and an isolation component above it. The isolation component separates the air inlet from the volatiles inlet. Under negative pressure, the volatiles input through the volatiles inlet move along the direction of the combustion chamber and burn. The air inlet, also under negative pressure, moves along the direction of the combustion chamber body and mixes with the volatiles in the middle of the combustion chamber body, promoting combustion before entering the lower layer. This avoids the volatiles immediately mixing with the air entering through the air inlet upon entering the combustion chamber body, which would create a swirling airflow. This results in a more uniform and rational temperature distribution within the calcining furnace, more stable operation, and reduced fan output frequency, thus achieving energy-saving effects. Attached Figure Description
[0019] Figure 1 A schematic diagram of the structure of the first layer fire channel of a calcining furnace provided for an embodiment of this utility model;
[0020] Figure 2 for Figure 1 A schematic diagram of the parabolic structure at point AA. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0022] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a first-layer fire channel structure for a calcining furnace, comprising:
[0023] The fire duct component includes a fire duct body 11, a volatile matter inlet 12 is provided at the upper part of the fire duct body 11, an regulating door 13 is provided at one end of the fire duct body 11, and an air inlet 14 is provided on one side of the fire duct body 11.
[0024] The isolation component includes a support component and a partition component 22. The isolation component is longitudinally arranged inside the fire channel body 11. The isolation component has a first opening 16, which is located on the same axis as the air inlet 14. The partition component 22 is arranged on the upper part of the isolation component.
[0025] In the technical solution provided by this utility model embodiment, the function of the fire channel component is to provide a place for the combustion of volatiles. The fire channel component includes a fire channel body 11, a volatile inlet 12 is provided at the upper part of the fire channel body 11, an regulating door 13 is provided at one end of the fire channel body 11, and an air inlet 14 is provided on one side of the fire channel body 11. The function of the isolation component is to separate the volatile inlet 12 and the air inlet 14. The isolation component includes a supporting component and a separating component 22. The isolation component is longitudinally arranged in the fire channel body 11 and has a first opening 16. The first opening 16 and the air inlet 14 are located on the same axis. The separating component 22 is arranged at the upper part of the isolation component. Compared with the prior art, the flue gas at the volatile outlet of the first layer fire channel of the calcining furnace is turbid and swirling. The negative pressure in front of the furnace in the first layer fire channel is equal to or higher than that behind the furnace, which does not conform to the normal rule that the negative pressure at the far end is lower. It is necessary to increase the fan power to provide sufficient negative pressure to draw away the flue gas. However, the large negative pressure will cause the volatiles to not be fully combusted in the first layer fire channel. Incomplete combustion of volatiles can cause them to migrate to lower layers for combustion, resulting in high temperatures in the bottom flue of the calcining furnace, sometimes exceeding those of the first flue, and causing the furnace bottom plate to glow red. This technical solution addresses this by installing a support component on the side of the air inlet 14 and an isolation component on top of the support component. The isolation component separates the passage between the air inlet 14 and the volatile matter inlet 12. Under negative pressure, the volatiles input through the volatile matter inlet 12 move along the flue direction and burn. The air inlet 14, also under negative pressure, moves along the flue body 11 and mixes with the volatiles in the middle of the flue body 11, promoting combustion before entering the lower layer. This prevents the volatiles from directly mixing with the air from the air inlet 14 upon entering the flue body 11, thus avoiding a swirling airflow. This results in a more uniform and reasonable temperature distribution in the calcining furnace, more stable operation, and reduced fan output frequency, achieving energy-saving effects.
[0026] The aforementioned flue components provide a combustion environment for volatile components. Each flue component includes a flue body 11, with a volatile component inlet 12 at its upper part, a regulating valve 13 at one end, and an air inlet 14 on one side. The flue body 11 is typically the first-floor flue. The regulating valve 13 adjusts the intake of cold air; when the temperature inside the flue body 11 increases, the regulating valve 13 can be opened to allow cold air into the flue body 11. The air inlet 14 typically receives preheated air. Volatile components enter the flue body 11 through the volatile component inlet 12, which is located below the volatile component inlet 12. One end of the separating component 22 extends to the volatile component inlet 12. Directly below point 2, the purpose is to bring the mixing position of volatiles and air closer to the right, allowing the preheated air to have a longer contact time with the volatiles and improving the combustion efficiency of the volatiles. Specifically, the fire channel body 11 includes a first side wall 111, a second side wall 112, a first bottom wall 113, and a first top wall 114. The first side wall 111 and the second side wall 112 are arranged opposite each other. The first top wall 114 is located above the first side wall 111 and the second side wall 112. The first bottom wall 113 is located below the first side wall 111 and the second side wall 112. The volatile inlet 12 is located on the first top wall 114, and the air inlet 14 is located on the first side wall 111. An observation port component 15 is provided at the other end of the fire channel body 11 for personnel to observe the situation inside the fire channel body 11. A lower burner 16 is provided at the end of the first bottom wall 113 furthest from the regulating door 13. After the volatiles have burned to a certain extent, they enter the next fire channel through the lower burner 16. After the volatiles enter the fire channel, they mix with the air entering through the air inlet 14 and produce mixed flue gas. In addition, a swirling airflow similar to a tornado is generated, causing the negative pressure in front of the furnace to be equal to or higher than the negative pressure behind the furnace. This does not conform to the normal law of the negative pressure decreasing at the far end. Therefore, it is necessary to increase the power of the blower to generate a stronger negative pressure to extract the flue gas. However, a stronger negative pressure will increase the power of the blower and will also cause the volatiles to move to the lower fire channel for combustion without being fully burned in the fire channel body 11, resulting in excessively high temperatures in the bottom fire channel. Therefore, a lower burner 16 is provided near the air inlet 14. An isolation component is installed to separate the volatile matter inlet 12 and the air inlet 14. The isolation component includes a support component and a partition component 22. The isolation component is longitudinally positioned within the fire channel body 11 and has a first opening 16 coaxial with the air inlet 14. The partition component 22 is located at the upper part of the isolation component, allowing the support component and partition component 22 to close the straight channel between the volatile matter inlet 12 and the air inlet 14. The volatile matter entering through the volatile matter inlet 12 moves to the left side of the fire channel body 11 under negative pressure, and the preheated air entering through the air inlet 14 also moves towards the fire channel body 11 under negative pressure. Then, mixing and combustion occur in the middle of the fire channel body 11.This not only ensures efficient combustion of volatiles but also prevents the formation of swirling airflow, resulting in a more uniform and rational temperature distribution in the calcining furnace. Simultaneously, it ensures more stable furnace operation and keeps the fan at normal power levels, eliminating the need for additional output power and achieving energy-saving effects.
[0027] Furthermore, the support components include a first support plate 211, a second support plate 212, and a third support plate 213. The first support plate 211 and the second support plate 212 are attached to the first side wall 111. The first support plate 211 and the second support plate 212 are disposed on both sides of the air inlet 14. The separator 22, the first support plate 211, the second support plate 212, and the first bottom wall 113 form a first opening 16. The third support plate 213 is attached to the second side wall 112. In this embodiment, a supporting component is further defined. The supporting component supports the partition component 22. The first supporting plate 211, the second supporting plate 212, and the third supporting plate 213 are made of refractory bricks or other refractory materials. The first supporting plate 211 and the second supporting plate 212 are located on both sides of the air inlet 14. The first opening 16 is located between the first supporting plate 211 and the second supporting plate 212. The partition component 22, the first supporting plate 211, the second supporting plate 212, and the first bottom wall 113 form the first opening 16. One side of the first supporting plate 211 and the second supporting plate 212 are attached to the first side wall 111, and the third supporting plate 213 is attached to... On the second side wall 112, a partition component 22 is disposed on the upper part of the first support plate 211, the second support plate 212 and the third support plate 213. The lower parts of both sides of the partition component 22 are fixedly connected to the first support plate 211, the second support plate 212 and the third support plate 213 respectively, so that the second support plate 212, the third support plate 213, the bottom wall and the partition component 22 form a second opening 24. When cold air needs to enter the fire duct body 11, the regulating door 13 is opened. Under the action of negative pressure, the cold air enters from the regulating door 13 and enters the area where the preheated air and volatile matter are mixed through the second opening 24, thereby achieving the technical effect of regulating the temperature inside the fire duct body 11.
[0028] Furthermore, one end face of the separating component 22 is flush with the end face of the third support plate 213, and the projected position of the separating component 22 covers the volatile matter inlet 12. In this embodiment, the separating component 22 is further defined. The separating component 22 is made of refractory brick, and the separating component 22 is installed on the support component. The surface of the separating component 22 is kept flat, and the separating component 22 is set horizontally. One end face of the separating component 22 is flush with the end face of the third support plate 213, and the projected position of the separating component 22 covers the volatile matter inlet 12. Specifically, the other end of the separating component 22 extends to the left, and the other end face of the separating component 22 exceeds the position of the volatile matter inlet 12, so that the area projected upward by the separating component 22 completely covers or occupies the volatile matter inlet 12, thereby blocking the volatile matter. Under the action of negative pressure, the volatile matter moves to the left and then comes into contact with the preheated air after moving to the left side of the separating component 22, thereby achieving the technical effect of eliminating the rotating airflow.
[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A structure of a first layer fire channel of a calcining furnace, characterized by, The first layer flue structure of the calcining furnace comprises: a flue component, which comprises a flue body, an upper portion of the flue body is provided with a volatile inlet, one end of the flue body is provided with an adjusting door, and one side of the flue body is provided with an air inlet; an isolation component, which comprises a support component and a partition component, is longitudinally arranged in the flue body, the isolation component has a first opening, the first opening is located on the same axis as the air inlet, and the partition component is arranged at the upper portion of the isolation component.
2. The first layer flue structure of the calcining furnace according to claim 1, wherein the air inlet is located on the lower side of the volatile inlet, and one end of the partition component extends to the position directly below the volatile inlet.
3. The first layer flue structure of the calcining furnace according to claim 2, wherein the flue body comprises a first side wall, a second side wall, a first bottom wall and a first top wall, the first side wall and the second side wall are oppositely arranged, the first top wall is arranged at the upper portion of the first side wall and the second side wall, the first bottom wall is arranged at the lower portion of the first side wall and the second side wall, the volatile inlet is arranged on the first top wall, and the air inlet is arranged on the first side wall.
4. The first layer flue structure of the calcining furnace according to claim 3, wherein the support component comprises a first support plate, a second support plate and a third support plate, the first support plate and the second support plate are attached to the first side wall, the first support plate and the second support plate are arranged on the two sides of the air inlet, the partition component, the first support plate, the second support plate and the first bottom wall enclose the first opening, and the third support plate is attached to the second side wall.
5. The first layer flue structure of the calcining furnace according to claim 4, wherein the lower portions of the two sides of the partition component are respectively fixedly connected to the first support plate, the second support plate and the third support plate.
6. The first layer flue structure of the calcining furnace according to claim 5, wherein the end face of one end of the partition component is flush with the end face of the third support plate, and the projection position of the partition component covers the volatile inlet.
7. The first layer flue structure of the calcining furnace according to claim 6, wherein the second support plate, the third support plate, the bottom wall and the partition component enclose a second opening.
8. The first layer flue structure of the calcining furnace according to any one of claims 3 to 7, wherein the other end of the flue body is provided with an observation port component.
9. The first layer flue structure of the calcining furnace according to any one of claims 3 to 7, wherein the first bottom wall is provided with a lower fire port at the end away from the adjusting door.