Copper smelting flue gas treatment system
By constructing a multi-stage purification system and precisely controlling reaction conditions, the problems of low waste heat recovery rate, incomplete dust removal, and low sulfur dioxide conversion rate in copper smelting flue gas have been solved, achieving efficient flue gas treatment and resource utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHIFENG YUNTONG NON FERROUS METAL CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-12
Smart Images
Figure CN224230736U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of flue gas treatment equipment, specifically to a copper smelting flue gas treatment system. Background Technology
[0002] In the copper smelting industry, smelting furnaces generate large amounts of high-temperature flue gas containing various pollutants. This flue gas is not only extremely hot, typically reaching 1300 degrees Celsius, and contains abundant waste heat resources, which, if not recovered and utilized, would not only result in a huge waste of energy but also increase production costs for enterprises. Simultaneously, the flue gas contains a large amount of particulate matter of varying sizes, including heavy metal particles such as copper and unreacted raw material dust. Direct emission into the atmosphere would cause severe dust pollution to the surrounding environment, affecting air quality and harming human health.
[0003] More importantly, the flue gas contains high concentrations of sulfur dioxide. Sulfur dioxide is a toxic gas with a strong, pungent odor. In the atmosphere, it combines with water vapor to form acid rain, causing severe corrosion and damage to soil, water bodies, vegetation, and buildings, seriously affecting the ecological balance and the human living environment. Therefore, effectively treating copper smelting flue gas to achieve waste heat recovery, dust removal, and sulfur dioxide conversion is an inevitable choice for the copper smelting industry to achieve sustainable development and meet environmental protection requirements.
[0004] Currently, although some flue gas treatment technologies exist, they still have many shortcomings in practical applications. For example, in the waste heat recovery stage, the heat exchange efficiency of some recovery devices is low, failing to fully recover the heat from the flue gas, resulting in low energy utilization. In terms of dust removal, some dust collection equipment is not effective at capturing fine particulate matter, making it difficult to meet stringent environmental emission standards. In sulfur dioxide treatment, traditional conversion processes suffer from low conversion rates and easy catalyst deactivation, resulting in a still high sulfur dioxide content in the final emitted flue gas, failing to meet increasingly stringent environmental regulations. Utility Model Content
[0005] To address the problems of poor flue gas treatment effect and low resource recovery rate in the existing technology, this utility model provides a copper smelting flue gas treatment system.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows:
[0007] A copper smelting flue gas treatment system includes a waste heat boiler, a high-pressure exhaust fan, an electrostatic precipitator, a primary smelting tower, an air-cooled tower, a secondary smelting tower, an electrostatic precipitator, a sulfur dioxide fan, a secondary oxygen distribution pipeline, and a converter. The inlet of the waste heat boiler is connected to the outlet of the smelting furnace; the outlet of the waste heat boiler is connected to the input of the high-pressure exhaust fan; the output of the high-pressure exhaust fan is connected to the inlet of the electrostatic precipitator; the outlet of the electrostatic precipitator is connected to the inlet of the primary smelting tower; the outlet of the primary smelting tower is connected to the inlet of the air-cooled tower; the outlet of the air-cooled tower is connected to the inlet of the secondary smelting tower; the outlet of the secondary smelting tower is connected to the inlet of the electrostatic precipitator; the outlet of the electrostatic precipitator is connected to the input of the sulfur dioxide fan; and the output of the sulfur dioxide fan is connected to the inlet of the converter. The secondary oxygen distribution pipeline is connected to the pipeline between the output of the sulfur dioxide fan and the inlet of the converter.
[0008] Furthermore, the high-efficiency exhaust fan comprises two fans connected in parallel.
[0009] Furthermore, a sulfur dioxide concentration meter and a first oxygen concentration meter are installed on the pipe between the output end of the sulfur dioxide blower and the air inlet of the converter. The sulfur dioxide concentration meter and the first oxygen concentration meter are located near the air inlet of the converter. The secondary oxygen distribution pipe is connected near the output end of the sulfur dioxide blower.
[0010] Furthermore, the secondary oxygen distribution pipeline is equipped with a second oxygen concentration meter, a flow meter, a manual valve, a regulating valve, and a check valve.
[0011] Furthermore, the sulfur dioxide concentration meter, the first oxygen concentration meter, the second oxygen concentration meter, the flow meter, and the regulating valve are all connected to the control system.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] This invention provides a copper smelting flue gas treatment system. It utilizes a waste heat boiler for flue gas heat exchange, effectively recovering and utilizing the heat energy in the flue gas and improving energy efficiency. The flue gas is conveyed to an electrostatic precipitator by a high-efficiency exhaust fan, which efficiently removes most of the particulate matter, reducing the burden on subsequent purification processes. The flue gas undergoes multi-stage purification and cooling through a primary moving tower, an air-cooled tower, and a secondary moving tower, further improving its purity and reducing its temperature. An electrostatic precipitator effectively removes liquid mist from the flue gas, yielding pure sulfur dioxide gas. During the transport of the pure sulfur dioxide gas to the converter, oxygen is introduced through a secondary oxygen distribution pipeline, and the concentration ratio is monitored using a concentration meter. The oxygen flow rate is precisely adjusted using a regulating valve, allowing for precise control of the sulfur dioxide and oxygen ratio according to reaction requirements. This ensures a more complete reaction of sulfur dioxide in the converter, thereby improving the efficiency and conversion effect of the entire flue gas treatment system and providing significant economic and environmental benefits. Attached Figure Description
[0014] The embodiments of this utility model will be further described below with reference to the accompanying drawings, wherein:
[0015] Figure 1 A schematic diagram of an embodiment of a copper smelting flue gas treatment system is shown;
[0016] Attached diagram labels: 1-Waste heat boiler, 2-High-pressure exhaust fan, 3-Electrostatic precipitator, 4-First moving tower, 5-Air cooling tower, 6-Second moving tower, 7-Electrostatic precipitator, 8-Sulfur dioxide fan, 9-Converter, 10-Sulfur dioxide concentration gauge, 11-First oxygen concentration gauge, 12-Second oxygen concentration gauge, 13-Flow meter, 14-Manual valve, 15-Regulating valve, 16-Check 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 copper smelting flue gas treatment system includes a waste heat boiler 1, a high-pressure exhaust fan 2, an electrostatic precipitator 3, a primary smelting tower 4, an air-cooled tower 5, a secondary smelting tower 6, an electrostatic precipitator 7, a sulfur dioxide fan 8, a secondary oxygen distribution pipeline, and a converter 9. The inlet of the waste heat boiler 1 is connected to the outlet of the smelting furnace, the outlet of the waste heat boiler 1 is connected to the input end of the high-pressure exhaust fan 2, the output end of the high-pressure exhaust fan 2 is connected to the inlet of the electrostatic precipitator 3, and the outlet of the electrostatic precipitator 3 is connected to... The air inlet and outlet of the first-stage rotating tower 4 are connected to the air inlet of the air-cooled tower 5. The air outlet of the air-cooled tower 5 is connected to the air inlet of the second-stage rotating tower 6. The air outlet of the second-stage rotating tower 6 is connected to the air inlet of the electrostatic precipitator 7. The air outlet of the electrostatic precipitator 7 is connected to the input end of the sulfur dioxide blower 8. The output end of the sulfur dioxide blower 8 is connected to the air inlet of the converter 9. A secondary oxygen distribution pipeline is connected to the pipeline between the output end of the sulfur dioxide blower 8 and the air inlet of the converter 9.
[0019] Furthermore, the high-pressure exhaust fan 2 includes two fans connected in parallel. When in use, one of the fans in parallel operates while the other serves as a backup, ensuring the stable operation of the entire system and preventing the system from stopping due to fan failure.
[0020] Furthermore, a sulfur dioxide concentration gauge 10 and a first oxygen concentration gauge 11 are installed on the pipeline between the output end of the sulfur dioxide blower 8 and the air inlet of the converter 9. The sulfur dioxide concentration gauge 10 and the first oxygen concentration gauge 11 are located near the air inlet of the converter 9; the secondary oxygen distribution pipeline is connected near the output end of the sulfur dioxide blower.
[0021] Furthermore, the secondary oxygen distribution pipeline is equipped with a second oxygen concentration meter 12, a flow meter 13, a manual valve 14, a regulating valve 15, and a check valve 16; both sides of the regulating valve 15 are equipped with manual valves 14, which facilitates the cutting off of the airflow in the pipeline and maintenance of the regulating valve 15 when the regulating valve 15 malfunctions.
[0022] Furthermore, the sulfur dioxide concentration meter 10, the first oxygen concentration meter 11, the second oxygen concentration meter 12, the flow meter 13, and the regulating valve 15 are all connected to the control system.
[0023] In operation, the copper smelting flue gas first enters the waste heat boiler 1 for heat exchange; after heat exchange, the flue gas enters the electrostatic precipitator 3 under the action of the high-pressure exhaust fan 2 to remove most of the particulate matter in the flue gas; then, the flue gas sequentially enters the primary cooling tower 4, the air-cooling tower 5, and the secondary cooling tower 6 for multi-stage purification and impurity removal to remove residual dust and impurities in the flue gas, while the flue gas is further cooled during this process; then, the flue gas enters the electrostatic precipitator 7 to remove liquid mist from the flue gas, obtaining pure sulfur dioxide gas; the pure sulfur dioxide gas enters the space between the sulfur dioxide fan 8 and the converter 9 under the action of the sulfur dioxide fan 8. Inside the pipeline, oxygen simultaneously enters the pipeline between the sulfur dioxide blower 8 and the converter 9 through a secondary oxygen distribution pipeline, mixing with the sulfur dioxide gas. The concentration and ratio of sulfur dioxide and oxygen in the pipeline between the sulfur dioxide blower 8 and the converter 9 are monitored by the sulfur dioxide concentration gauge 10 and the first oxygen concentration gauge 11. According to the reaction requirements, the oxygen flow rate is adjusted by the regulating valve 15, thereby adjusting the ratio between sulfur dioxide and oxygen, so that the sulfur dioxide reacts more thoroughly in the converter 9. The sulfur dioxide reacts with oxygen in the converter 9 to generate sulfur trioxide gas, which is used to produce sulfuric acid.
[0024] This invention provides a copper smelting flue gas treatment system. It utilizes a waste heat boiler for flue gas heat exchange, effectively recovering and utilizing the heat energy in the flue gas and improving energy efficiency. The flue gas is conveyed to an electrostatic precipitator by a high-efficiency exhaust fan, which efficiently removes most of the particulate matter, reducing the burden on subsequent purification processes. The flue gas undergoes multi-stage purification and cooling through a primary moving tower, an air-cooled tower, and a secondary moving tower, further improving its purity and reducing its temperature. An electrostatic precipitator effectively removes liquid mist from the flue gas, yielding pure sulfur dioxide gas. During the transport of the pure sulfur dioxide gas to the converter, oxygen is introduced through a secondary oxygen distribution pipeline, and the concentration ratio is monitored using a concentration meter. The oxygen flow rate is precisely adjusted using a regulating valve, allowing for precise control of the sulfur dioxide and oxygen ratio according to reaction requirements. This ensures a more complete reaction of sulfur dioxide in the converter, thereby improving the efficiency and conversion effect of the entire flue gas treatment system and providing significant economic and environmental benefits.
[0025] The foregoing description describes some exemplary embodiments of this utility model. It is understood that the above embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model. 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 this utility model. 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 this utility model.
Claims
1. A copper smelting flue gas treatment system, characterized in that, The system includes a waste heat boiler (1), a high-pressure exhaust fan (2), an electrostatic precipitator (3), a primary blast furnace (4), an air-cooled tower (5), a secondary blast furnace (6), an electrostatic precipitator (7), a sulfur dioxide fan (8), a secondary oxygen distribution pipeline, and a converter (9). The inlet of the waste heat boiler (1) is connected to the outlet of the smelting furnace, the outlet of the waste heat boiler (1) is connected to the input of the high-pressure exhaust fan (2), the output of the high-pressure exhaust fan (2) is connected to the inlet of the electrostatic precipitator (3), and the outlet of the electrostatic precipitator (3) is connected to the inlet of the primary blast furnace (4). The outlet of the first moving tower (4) is connected to the inlet of the air-cooled tower (5), the outlet of the air-cooled tower (5) is connected to the inlet of the second moving tower (6), the outlet of the second moving tower (6) is connected to the inlet of the electrostatic precipitator (7), the outlet of the electrostatic precipitator (7) is connected to the input end of the sulfur dioxide blower (8), and the output end of the sulfur dioxide blower (8) is connected to the inlet of the converter (9); the secondary oxygen distribution pipeline is connected to the pipeline between the output end of the sulfur dioxide blower (8) and the inlet of the converter (9).
2. The copper smelting flue gas treatment system according to claim 1, characterized in that, The high-efficiency exhaust fan (2) comprises two fans connected in parallel.
3. The copper smelting flue gas treatment system according to claim 1, characterized in that, A sulfur dioxide concentration meter (10) and a first oxygen concentration meter (11) are provided on the pipe between the output end of the sulfur dioxide blower (8) and the air inlet of the converter (9). The sulfur dioxide concentration meter (10) and the first oxygen concentration meter (11) are located near the air inlet of the converter (9). The secondary oxygen distribution pipe is connected near the output end of the sulfur dioxide blower.
4. The copper smelting flue gas treatment system according to claim 3, characterized in that, The secondary oxygen distribution pipeline is equipped with a second oxygen concentration meter (12), a flow meter (13), a manual valve (14), a regulating valve (15), and a check valve (16).
5. A copper smelting flue gas treatment system according to claim 4, characterized in that, The sulfur dioxide concentration meter (10), the first oxygen concentration meter (11), the second oxygen concentration meter (12), the flow meter (13), and the regulating valve (15) are all connected to the control system.