Secondary air oxygen distribution system of side-blown converter

Abstract

The utility model relates to the technical field of non-ferrous metal metallurgy, in particular to a secondary air oxygen distribution system of a side-blown converter, which is characterized in that a gas component analyzer is arranged at a flue gas outlet of the side-blown converter, one end of a secondary air main pipeline is connected with an air feeder, and the other end is connected with a mixing pipe; the mixing pipe is arranged in a flue gas area of the side-blown converter, and a gas mixing device is arranged in the mixing pipe; a secondary air branch pipe is arranged on the secondary air main pipeline, the secondary air branch pipe is connected with an oxygen pipeline, and a first flow regulating valve is arranged on the oxygen pipeline; a second flow regulating valve is arranged on the secondary air main pipeline, and is arranged between the air feeder and the secondary air branch pipe; and the gas component analyzer, the first flow regulating valve and the second flow regulating valve are connected with a control system. The real-time combustion state and component information of flue gas can be accurately obtained, the flow ratio of oxygen to the air supply amount is accurately controlled, the oxygen distribution accuracy is improved, the combustion efficiency of the flue gas is improved, and emission of harmful substances is reduced.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal smelting technology, specifically to a secondary air oxygen distribution system for a side-blown furnace. Background Technology

[0002] In the metallurgical industry, the side-blown furnace is an important piece of smelting equipment, and its operating efficiency and environmental performance directly affect production benefits and environmental protection. During the smelting process, the side-blown furnace generates a large amount of flue gas, which contains not only valuable gaseous components but may also contain harmful substances. Therefore, the treatment and control of this flue gas is of paramount importance.

[0003] Traditional side-blown boiler secondary air oxygen distribution systems often employ relatively simple distribution methods, lacking precise gas composition analysis and flow regulation mechanisms. This makes it difficult to accurately control the oxygen ratio of the secondary air during actual operation, and prevents timely adjustments based on the actual composition of the flue gas. On the one hand, this can lead to a waste of oxygen resources and increased production costs; on the other hand, an unreasonable oxygen ratio can also affect the combustion efficiency of the flue gas, resulting in increased emissions of harmful substances and environmental pollution. Utility Model Content

[0004] To address the problem of inaccurate control of the secondary air oxygen distribution ratio in the existing technology, this utility model provides a secondary air oxygen distribution system for a side-blown furnace.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A secondary air oxygen distribution system for a side-blown furnace includes a gas composition analyzer, a main secondary air duct, a blower, a mixing pipe, a gas mixing device, secondary air branch pipes, an oxygen pipeline, and a control system. The gas composition analyzer is located at the flue gas outlet of the side-blown furnace. One end of the main secondary air duct is connected to the blower, and the other end is connected to the mixing pipe. The mixing pipe is located in the flue gas zone of the side-blown furnace, and the gas mixing device is installed inside the mixing pipe. The gas mixing device includes at least two perforated plates spaced apart along the airflow direction, with the perforation diameter of the perforated plates decreasing layer by layer along the airflow direction, and the perforations of adjacent perforated plates being staggered. The secondary air branch pipe is installed on the main secondary air duct and connected to the oxygen pipeline. A first flow regulating valve is installed on the oxygen pipeline. A second flow regulating valve is installed on the main secondary air duct and located between the blower and the secondary air branch pipe. The gas composition analyzer, the first flow regulating valve, and the second flow regulating valve are connected to the control system.

[0007] Furthermore, the oxygen pipeline is equipped with a shut-off valve, which is located between the first flow regulating valve and the secondary air branch pipe, and the shut-off valve is connected to the control system.

[0008] Furthermore, both the first flow regulating valve and the second flow regulating valve are solenoid valves.

[0009] Furthermore, the control system includes a data processing module, an information storage module, a security module, and a user interface module.

[0010] Furthermore, the blower is a variable frequency blower.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention provides a secondary air oxygen distribution system for a side-blown furnace. A gas composition analyzer monitors the flue gas composition at the furnace outlet in real time, accurately acquiring the real-time combustion status and composition information of the flue gas. This provides precise data support for subsequent oxygen distribution control. Based on the real-time data from the gas composition analyzer, the control system automatically adjusts the opening of the first and second flow regulating valves, precisely controlling the flow ratio of oxygen and air supply. This improves the accuracy of oxygen distribution, which in turn enhances flue gas combustion efficiency and reduces the emission of harmful substances. Attached Figure Description

[0013] The embodiments of this utility model will be further described below with reference to the accompanying drawings, wherein:

[0014] Figure 1 A schematic diagram of an embodiment of the secondary air oxygen distribution system for a side-blown furnace is shown;

[0015] Figure 2 A schematic diagram of the secondary air oxygen distribution process in a side-blown furnace is shown.

[0016] Attached diagram labels: 1-Gas composition analyzer, 2-Secondary air main duct, 3-Blower, 4-Mixing pipe, 5-Secondary air branch duct, 6-Oxygen pipeline, 7-Control system, 8-First flow regulating valve, 9-Second flow regulating valve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0018] Reference Appendix Figure 1A secondary air oxygen distribution system for a side-blown furnace includes a gas composition analyzer 1, a secondary air main duct 2, a blower 3, a mixing pipe 4, a gas mixing device, secondary air branch pipes 5, an oxygen pipeline 6, and a control system 7. The gas composition analyzer 1 is located at the flue gas outlet of the side-blown furnace. One end of the secondary air main duct 2 is connected to the blower 3, and the other end is connected to the mixing pipe 4. The mixing pipe 4 is located in the flue gas zone of the side-blown furnace, and a gas mixing device is installed inside the mixing pipe 4. The gas mixing device includes at least two perforated plates arranged at intervals along the airflow direction. The diameter of the perforated plates decreases layer by layer along the airflow direction, and the perforations of adjacent perforated plates are staggered. The secondary air main duct 2 is provided with a secondary air branch pipe 5, which is connected to the oxygen pipeline 6. The oxygen pipeline 6 is provided with a first flow regulating valve 8. The secondary air main duct 2 is provided with a second flow regulating valve 9, which is located between the blower 3 and the secondary air branch pipe 5. The gas composition analyzer 1, the first flow regulating valve 8, and the second flow regulating valve 9 are connected to the control system 7.

[0019] In one embodiment of this utility model, an oxygen pipeline 6 is provided with a shut-off valve, which is located between the first flow regulating valve 8 and the secondary air branch pipe 5. The shut-off valve is connected to the control system 7. The shut-off valve can realize the rapid cut-off of oxygen and prevent excessive oxygen from entering the side-blown furnace and causing safety hazards.

[0020] In one embodiment of this utility model, both the first flow regulating valve 8 and the second flow regulating valve are solenoid valves.

[0021] In one embodiment of this utility model, the control system 7 includes a data processing module, an information storage module, a safety module, and a user interface module. The data processing module receives the analysis results from the gas composition analyzer 1 and calculates the required oxygen and air volume ratio according to a preset algorithm, controlling and adjusting the first flow regulating valve 8 and the second flow regulating valve 9. When the flue gas composition is abnormal or the system malfunctions, the safety module will issue an alarm signal to remind the operator. The user interface module can display the flue gas composition, air supply flow rate, oxygen flow rate, and system operating status, and the operator can manually adjust or set the system parameters.

[0022] In one embodiment of this utility model, the blower 3 is a variable frequency blower 3.

[0023] Reference Appendix Figure 2 During system operation, the gas composition analyzer 1 continuously collects flue gas composition data at the flue gas outlet of the side-blown furnace and uploads it to the control system 7. The control system 7 calculates the required oxygen replenishment amount and generates adjustment commands based on the real-time changes in carbon monoxide and oxygen concentrations. The first flow regulating valve 8 and the second flow regulating valve 9 adjust their openings according to the commands, regulating the air supply flow and oxygen flow to optimize the oxygen content in the secondary air entering the side-blown furnace.

[0024] This invention provides a secondary air oxygen distribution system for a side-blown furnace. A gas composition analyzer monitors the flue gas composition at the furnace outlet in real time, accurately acquiring the real-time combustion status and composition information of the flue gas. This provides precise data support for subsequent oxygen distribution control. Based on the real-time data from the gas composition analyzer, the control system automatically adjusts the opening of the first and second flow regulating valves, precisely controlling the flow ratio of oxygen and air supply. This improves the accuracy of oxygen distribution, which in turn enhances flue gas combustion efficiency and reduces the emission of harmful substances.

[0025] The foregoing description describes some exemplary embodiments of the present invention. It is understood that the above embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention. The features in these embodiments can be recombinated in a suitable manner, and the resulting solutions are still within the scope of protection claimed by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without inventive effort, that is, all modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by the present invention.

Claims

1. A secondary air oxygen distribution system for a side-blown furnace, characterized in that, The system includes a gas composition analyzer (1), a secondary air main duct (2), a blower (3), a mixing pipe (4), a gas mixing device, secondary air branch pipes (5), an oxygen pipeline (6), and a control system (7). The gas composition analyzer (1) is located at the flue gas outlet of the side-blown furnace. One end of the secondary air main duct (2) is connected to the blower (3), and the other end is connected to the mixing pipe (4). The mixing pipe (4) is located in the flue gas zone of the side-blown furnace. The mixing device is installed inside the mixing pipe (4). The gas mixing device includes at least two perforated plates arranged at intervals along the airflow direction. The perforation diameter of the perforated plates is... The flow rate decreases layer by layer along the airflow direction, and the holes of two adjacent perforated plates are arranged alternately; the secondary air main duct (2) is provided with the secondary air branch pipe (5), the secondary air branch pipe (5) is connected to the oxygen pipeline (6), the oxygen pipeline (6) is provided with the first flow regulating valve (8); the secondary air main duct (2) is provided with the second flow regulating valve (9), the second flow regulating valve (9) is located between the blower (3) and the secondary air branch pipe (5); the gas composition analyzer (1), the first flow regulating valve (8) and the second flow regulating valve (9) are connected to the control system (7).

2. The secondary air oxygen distribution system for a side-blown furnace according to claim 1, characterized in that, The oxygen pipeline (6) is equipped with a shut-off valve, which is located between the first flow regulating valve (8) and the secondary air branch pipe (5), and the shut-off valve is connected to the control system (7).

3. The secondary air oxygen distribution system for a side-blown furnace according to claim 1, characterized in that, Both the first flow regulating valve (8) and the second flow regulating valve are solenoid valves.

4. The secondary air oxygen distribution system for a side-blown furnace according to claim 1, characterized in that, The control system (7) includes a data processing module, an information storage module, a security module, and a user interface module.

5. The secondary air oxygen distribution system for a side-blown furnace according to claim 1, characterized in that, The blower (3) is a variable frequency blower (3).

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