High-temperature desorption control device for roaster

Abstract

This utility model relates to a high-temperature denitrification control device for a roasting furnace, belonging to the field of flue gas treatment technology in prebaked anode production. It includes a denitrification rack and a main controller. The denitrification rack is equipped with a storage hopper for holding denitrifying agent particles and a discharge drive mechanism for controlling the discharge of the unloader. The signal input terminal of the main controller is connected to a flue gas detection device. Multiple sets of storage hoppers are equidistantly arranged along the length of the denitrification rack. The bottom of each storage hopper is connected to a discharge hopper via a unloader. A variable frequency motor is installed at one end of the denitrification rack. A drive linkage is connected to the power output shaft of the variable frequency motor. The drive linkage is poweredly connected to the unloader via a transmission assembly. The variable frequency motor is electrically connected to the signal output terminal of the main controller. This utility model has the following advantages: the drive linkage drives the unloader to work, and the material in the storage hopper is automatically injected into the flue gas duct through the discharge hopper by the action of the unloader, realizing automatic injection of denitrifying agent particles as needed.

Description

Technical Field

[0001] This utility model relates to a high-temperature denitrification control device for a roasting furnace, belonging to the field of flue gas treatment technology for prebaked anode production. Background Technology

[0002] In response to national environmental protection policies and to address the purification of harmful substances such as asphalt fumes, sulfur dioxide, benzo[a]pyrene, and VOCs in roasting flue gas, the flue gas treatment system of the roasting furnace needs to be upgraded. According to the latest industry regulations, carbon companies must incorporate flue gas desulfurization, denitrification, and organic waste gas treatment into their performance management, thus imposing higher standards on roasting furnace emission control. To meet the company's Class A emission standards, manual addition of denitrification agents is currently required. However, this method is labor-intensive, leads to significant fluctuations in environmental data, and results in unstable environmental data during roasting, posing a high risk of waste and environmental hazards.

[0003] To solve one of the above problems, there is an urgent need for a high-temperature denitrification control device for roasting furnaces. Utility Model Content

[0004] Based on the shortcomings of the existing technology, the technical problem to be solved by this utility model is: how to realize the rotation of the drive linkage by the variable frequency motor, the drive linkage drives the unloader to work, and the material in the storage hopper is automatically injected into the fire channel through the discharge hopper by the unloader, so as to realize the automatic injection of denitrifying agent particles as needed. To this end, a high-temperature denitrification control device for roasting furnace is provided.

[0005] The high-temperature denitrification control device for a roasting furnace according to this utility model includes a denitrification rack and a main controller. The denitrification rack is equipped with a storage hopper for holding denitrification agent particles and a discharge drive mechanism for controlling the discharge of the unloader. The signal input terminal of the main controller is connected to a flue gas detection device, which is used to detect the nitrogen oxide concentration in the flue gas produced by prebaked aluminum anodes and carbon electrodes. The device is characterized in that: multiple sets of storage hoppers are arranged at equal intervals along the length of the denitrification rack, and the bottom of the storage hoppers is connected to a discharge hopper through a unloader. A variable frequency motor is provided at one end of the denitrification rack, and a drive linkage is connected to the power output shaft of the variable frequency motor. The drive linkage is poweredly connected to the unloader through a transmission assembly, and the variable frequency motor is electrically connected to the signal output terminal of the main controller. This technology relates to the field of flue gas treatment in the production of prebaked anodes and carbon electrodes for aluminum. The flue gas detection device is used to detect the nitrogen oxide concentration in the flue gas produced during the production of prebaked anodes and carbon electrodes for aluminum. When flue gas parameters fluctuate, the main controller controls a variable frequency motor to drive a connecting rod to rotate. The connecting rod then drives a discharge device, allowing material in the storage hopper to be automatically injected into the flue gas through the discharge hopper as needed. This achieves automatic injection of denitrification agent particles. It effectively controls the nitrogen oxides in the flue gas to remain within emission limits, reducing manpower and material resources, saving production and operating costs, and ensuring the normal and stable operation of the high-temperature denitrification device and control system of the calcining furnace under high-temperature operating conditions, thereby reducing production and operating costs and stabilizing flue gas emission indicators.

[0006] In any of the above embodiments, it is preferred that the flue gas detection device is a nitrogen oxide sensor installed inside the flue. The nitrogen oxide sensor, installed inside the flue, is used to detect the nitrogen oxide concentration in the flue gas produced during the production of prebaked anodes and carbon electrodes for aluminum. The nitrogen oxide parameter signal collected by the flue gas detection device is transmitted to the main controller. The main controller, through a frequency converter, controls the operation of the variable frequency motor, driving the variable frequency motor to provide power to the drive linkage, so that the material in the storage hopper is continuously and stably injected into the flue through the unloader as a denitrification agent.

[0007] In any of the above embodiments, it is preferred that the transmission component includes a chain. The chain is made of metal and can transmit more power and withstand higher loads compared to belt drives.

[0008] In any of the above embodiments, it is preferred that the drive linkage includes multiple sets of transmission linkage units connected end to end, one set of transmission linkage units at the end is connected to the output shaft of the variable frequency motor, each set of transmission linkage units is provided with a sprocket B, a linkage support seat is installed on one side of the denitrification frame, and the transmission linkage unit is mounted on the linkage support seat through a bearing seat.

[0009] In any of the above solutions, it is preferred that a flow-limiting gate is provided at the outlet of the storage hopper.

[0010] In any of the above embodiments, it is preferred that the unloader is a rotary valve, with a sprocket A mounted on the power input shaft of the rotary valve, and the sprocket A being connected to the sprocket B via a chain. When material in the storage hopper falls under its own weight and fills the gaps between the blades of the rotary valve, it is discharged from the bottom as the blades rotate. Therefore, the rotary valve can discharge material quantitatively and continuously.

[0011] In any of the above embodiments, it is preferred that the unloader includes a housing and a feeder rotor rotatably mounted inside the housing. The outer wall of the feeder rotor has blades adapted to the inner cavity of the housing. A sprocket A is mounted on the power input shaft located at the center of the feeder rotor. The sprocket A is connected to the sprocket B via a chain.

[0012] Preferably, in any of the above embodiments, five sets of storage hoppers and five sets of unloaders and discharge hoppers are provided. The discharge port of the discharge hopper extends to the denitrification agent granule addition port of the roasting furnace flue, automatically and evenly distributing granules to each flue. This allows for quantitative addition of denitrification agent based on the nitrogen oxide content in the flue gas, and is simple to operate and easy to maintain. Multiple sets of unloaders are driven by the same set of variable frequency motors. When the material in the storage hopper falls under its own weight and fills the gaps between the blades of the star-shaped unloader, it is discharged at the bottom as the blades rotate. Under the action of the variable frequency motor, the feeding is more precise and the control is more accurate. At the same time, the equipment operates at a low speed, effectively extending the service life of the equipment, and each unloader can be independently disconnected from the system.

[0013] In any of the above embodiments, it is preferred that the frequency converter is connected to another frequency converter, and the frequency converter is connected to a main controller. In any of the above embodiments, it is preferred that the main controller is a PLC (Programmable Logic Controller).

[0014] Compared with the prior art, the present invention has the following beneficial effects: The high-temperature denitrification control device for the roasting furnace described in this utility model is used in the field of flue gas treatment technology for the production of prebaked anodes and carbon electrodes for aluminum. The flue gas detection device is used to detect the nitrogen oxide concentration in the flue gas produced by the production of prebaked anodes and carbon electrodes for aluminum. When the parameters of the roasting flue gas ...

[0015] The high-temperature denitrification control device for the roasting furnace described in this utility model can effectively control the nitrogen oxides in the flue gas to remain within the emission standards, reduce manpower and material resources, save production and operating costs, reduce the workload of manual labor, ensure the normal and stable operation of the high-temperature denitrification device and control system of the roasting furnace under high-temperature operating conditions, reduce production and operating costs, and stabilize flue gas emission standards.

[0016] The high-temperature denitrification control device for the roasting furnace described in this utility model uses multiple sets of unloaders driven by the same set of variable frequency motors. When the material in the storage hopper falls by its own weight and fills the gaps between the blades of the star-shaped unloader, it is discharged from the bottom as the blades rotate. Under the action of the variable frequency motor, the feeding is more precise and the control is more accurate. At the same time, the equipment operates at a low speed, which effectively extends the service life of the equipment. Moreover, each unloader can be disconnected from the system independently.

[0017] The high-temperature denitrification control device for the roasting furnace described in this utility model has five sets of storage hoppers and five sets of unloaders and discharge hoppers. The discharge port of the discharge hopper extends to the denitrification agent particle addition port of the roasting furnace fire channel, and automatically and evenly distributes particles to each fire channel. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the transmission component of this utility model; Figure 3 This is a diagram of the internal structure of the unloader; Figure 4 for Figure 3 View A in the middle; Figure 5 This is a structural diagram of a single transmission connecting rod unit; Figure 6 for Figure 5 View B in the diagram.

[0020] In the diagram: 1. Denitrification frame; 2. Storage hopper; 3. Discharge hopper; 4. Feeder; 5. Drive link; 6. Linkage sleeve; 7. Linkage support seat; 8. Variable frequency motor; 9. Chain; 10. Blade; 11. Feeder rotor; 12. Power input shaft; 13. Sprocket A; 14. Flow limiting gate; 15. Sprocket B; 16. Flue gas detection device; 17. Main controller; 18. Variable frequency controller. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings: The present invention will be further described below through specific embodiments, but it is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0022] Example 1, such as Figure 1-2 As shown, the high-temperature denitrification control device for a roasting furnace includes a denitrification frame 1 and a main controller 17. The denitrification frame 1 is equipped with a storage hopper 2 for holding denitrification agent particles and a discharge drive mechanism for controlling the discharge of the unloader. The signal input terminal of the main controller 17 is connected to a flue gas detection device 16, which is used to detect the nitrogen oxide concentration in the flue gas produced by prebaked aluminum anodes and carbon electrodes. Multiple sets of storage hoppers 2 are equidistantly arranged along the length of the denitrification frame 1. The bottom of the storage hopper 2 is connected to a discharge hopper 3 through a unloader. A variable frequency motor 8 is provided at one end of the denitrification frame 1. A drive linkage 5 is connected to the power output shaft of the variable frequency motor 8. The drive linkage 5 is poweredly connected to the unloader through a transmission assembly. The variable frequency motor 8 is electrically connected to the signal output terminal of the main controller 17. This technology relates to the field of flue gas treatment in the production of prebaked anodes and carbon electrodes for aluminum. The flue gas detection device 16 is used to detect the nitrogen oxide concentration in the flue gas produced in the prebaked anode and carbon electrode production process. When flue gas parameters fluctuate, the main controller 17 controls the variable frequency motor 8 to drive the drive linkage 5 to rotate. The drive linkage 5 drives the unloader, and the material in the storage hopper 2 is automatically injected into the flue gas through the discharge hopper 3 by the unloader, achieving on-demand automatic injection of denitrifying agent particles. This effectively controls the nitrogen oxides in the flue gas to remain within emission limits, reducing manpower and material resources, saving production and operating costs, reducing manual workload, ensuring the normal and stable operation of the high-temperature denitrification device and control system of the roasting furnace under high-temperature operating conditions, reducing production and operating costs, and stabilizing flue gas emission indicators.

[0023] Example 2, as Figure 1-3As shown, the high-temperature denitrification control device for a roasting furnace includes a denitrification frame 1 and a main controller 17. The denitrification frame 1 is equipped with a storage hopper 2 for holding denitrification agent particles and a discharge drive mechanism for controlling the discharge of the unloader. The signal input terminal of the main controller 17 is connected to a flue gas detection device 16, which is used to detect the nitrogen oxide concentration in the flue gas produced by prebaked aluminum anodes and carbon electrodes. Multiple sets of storage hoppers 2 are equidistantly arranged along the length of the denitrification frame 1. The bottom of the storage hopper 2 is connected to a discharge hopper 3 through a unloader. A variable frequency motor 8 is provided at one end of the denitrification frame 1. A drive linkage 5 is connected to the power output shaft of the variable frequency motor 8. The drive linkage 5 is poweredly connected to the unloader through a transmission assembly. The variable frequency motor 8 is electrically connected to the signal output terminal of the main controller 17.

[0024] Furthermore, the flue gas detection device 16 is a nitrogen oxide sensor installed inside the flue. The nitrogen oxide sensor, installed inside the flue, is used to detect the nitrogen oxide concentration in the flue gas produced during the production of prebaked anodes and carbon electrodes for aluminum. The nitrogen oxide parameter signal collected by the flue gas detection device 16 is transmitted to the main controller 17. The main controller 17 then controls the operation of the variable frequency motor 8 through the variable frequency controller 18, driving the variable frequency motor to provide power to the drive linkage, so that the material in the storage hopper is continuously and stably injected into the flue gas through the unloader.

[0025] Furthermore, the transmission assembly includes a chain 9. The chain is made of metal (such as carburized steel), which can transmit more power and withstand higher loads compared to belt drives.

[0026] Furthermore, referring to Figure 4-6 The drive linkage 5 includes multiple sets of transmission linkage units 5.1 connected end-to-end. One set of transmission linkage units 5.1 at the end is connected to the output shaft of the variable frequency motor 8. Each set of transmission linkage units 5.1 is equipped with a sprocket B15. A linkage support seat 7 is installed on one side of the denitrification frame 1, and the transmission linkage unit 5.1 is mounted on the linkage support seat 7 through a bearing seat. Further, a flow-limiting gate 14 is provided at the outlet of the storage hopper 2. Further, the unloader is a rotary valve, and a sprocket A13 is installed on the power input shaft of the rotary valve. The sprocket A13 is connected to the sprocket B15 through a chain 9. When the material in the storage hopper 2 falls under its own weight and fills the gaps between the blades of the rotary valve, it is discharged at the bottom as the blades rotate. Therefore, the rotary valve can discharge material quantitatively and continuously.

[0027] Furthermore, the unloader includes a housing and a feeder rotor 11 rotatably mounted inside the housing. The outer wall of the feeder rotor 11 has blades 10 adapted to the inner cavity of the housing. A sprocket A13 is mounted on the power input shaft 12 located at the center of the feeder rotor 11. The sprocket A13 is connected to the sprocket B15 via a chain 9.

[0028] Furthermore, the storage hopper 2 is provided in five sets, and the unloader and discharge hopper 3 are correspondingly provided in five sets. The discharge port of the discharge hopper 3 extends to the denitrification agent particle addition port in the calcining furnace flue. This allows for the quantitative addition of denitrification agent based on the nitrogen oxide content in the flue gas, and the operation is simple and easy to maintain.

[0029] Multiple unloaders are driven by the same set of variable frequency motors 8. When the material in the storage hopper 2 falls by its own weight and fills the gap between the blades of the star-shaped unloader, it is discharged from the bottom as the blades rotate. Under the action of the variable frequency motor 8, the feeding is more refined and the control is more precise. At the same time, the equipment operates at a low speed, which effectively extends the service life of the equipment. Each unloader can be disconnected from the system independently.

[0030] Furthermore, the frequency converter 8 is connected to a frequency converter 18, which is connected to the main controller 17.

[0031] The main controller 17 is a PLC programmable controller.

[0032] This utility model relates to a specific embodiment where the modification of the prior art lies in the hardware. Furthermore, the computer program involved is a simple program whose functions can be easily implemented by those skilled in the art using existing computer program development platforms and well-known programming methods. In this article, the unloader, flue gas detection device 16, frequency converter 18 and main controller 17 are only used in a simple way, and no improvement is involved in the method or procedure.

[0033] The high-temperature denitrification control device for the roasting furnace described in this utility model is used in the field of flue gas treatment technology for the production of prebaked anodes and carbon electrodes for aluminum. The flue gas detection device is used to detect the nitrogen oxide concentration in the flue gas produced by the production of prebaked anodes and carbon electrodes for aluminum. When the parameters of the roasting flue gas ...

[0034] The high-temperature denitrification control device for the roasting furnace described in this utility model can effectively control the nitrogen oxides in the flue gas to remain within the emission standards, reduce manpower and material resources, save production and operating costs, reduce the workload of manual labor, ensure the normal and stable operation of the high-temperature denitrification device and control system of the roasting furnace under high-temperature operating conditions, reduce production and operating costs, and stabilize flue gas emission standards.

[0035] The high-temperature denitrification control device for the roasting furnace described in this utility model uses multiple sets of unloaders driven by the same set of variable frequency motors. When the material in the storage hopper falls by its own weight and fills the gaps between the blades of the star-shaped unloader, it is discharged from the bottom as the blades rotate. Under the action of the variable frequency motor, the feeding is more precise and the control is more accurate. At the same time, the equipment operates at a low speed, which effectively extends the service life of the equipment. Moreover, each unloader can be disconnected from the system independently.

[0036] The high-temperature denitrification control device for the roasting furnace described in this utility model has five sets of storage hoppers and five sets of unloaders and discharge hoppers. The discharge port of the discharge hopper extends to the denitrification agent particle addition port of the roasting furnace fire channel, and automatically and evenly distributes particles to each fire channel.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0038] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A high-temperature denitrification control device for a roasting furnace, comprising a denitrification rack and a main controller, wherein the denitrification rack is equipped with a storage hopper for holding denitrification agent particles and a discharge drive mechanism for controlling the discharge of the unloader; the signal input terminal of the main controller is connected to a flue gas detection device, the flue gas detection device being used to detect the nitrogen oxide concentration in the flue gas produced from prebaked anodes and carbon electrodes for aluminum, characterized in that: Multiple sets of storage hoppers are equidistantly arranged along the length of the denitrification frame. The bottom of each storage hopper is connected to a discharge hopper via a discharge device. A variable frequency motor is installed at one end of the denitrification frame. A drive linkage is connected to the power output shaft of the variable frequency motor. The drive linkage is poweredly connected to the discharge device via a transmission assembly. The variable frequency motor is electrically connected to the signal output terminal of the main controller.

2. The high-temperature denitrification control device for the roasting furnace according to claim 1, characterized in that, The flue gas detection device is a nitrogen oxide sensor installed inside the flue.

3. The high-temperature denitrification control device for the roasting furnace according to claim 2, characterized in that, The transmission assembly includes a chain.

4. The high-temperature denitrification control device for the roasting furnace according to claim 3, characterized in that, The drive linkage includes multiple sets of transmission linkage units connected end to end. One set of transmission linkage units at the end is connected to the output shaft of the variable frequency motor. Each set of transmission linkage units is equipped with a sprocket B. A linkage support seat is installed on one side of the denitrification frame. The transmission linkage unit is mounted on the linkage support seat through a bearing seat.

5. The high-temperature denitrification control device for the roasting furnace according to claim 1, characterized in that, A flow-limiting gate is installed at the outlet of the storage hopper.

6. The high-temperature denitrification control device for a roasting furnace according to any one of claims 1-5, characterized in that, The unloader is a rotary valve, and a sprocket A is mounted on the power input shaft of the rotary valve. The sprocket A is connected to the sprocket B via a chain.

7. The high-temperature denitrification control device for the roasting furnace according to claim 6, characterized in that, The unloader includes a housing and a feeder rotor rotatably mounted inside the housing. The outer wall of the feeder rotor has blades adapted to the inner cavity of the housing. A sprocket A is mounted on the power input shaft at the center of the feeder rotor. The sprocket A is connected to the sprocket B via a chain.

8. The high-temperature denitrification control device for the roasting furnace according to claim 7, characterized in that, Five sets of storage hoppers are provided, and five sets of unloaders and discharge hoppers are provided accordingly. The discharge port of the discharge hopper extends to the denitrification agent particle addition port of the roasting furnace flue.

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