A dense water atomizing desulfurization device for a smelting furnace flue

Abstract

The utility model relates to a desulfurization device technical field discloses a mineral heat stove flue dense water atomization desulfurization device, including batching bin, dense water filter, dense water filter sets up at one side of batching bin, first connecting pipe, first connecting pipe fixedly communicates between batching bin between dense water filter, one side of batching bin is equipped with the flue, one side of dense water filter is equipped with the pressure pump, double -fluid atomization nozzle extends to double -fluid atomization nozzle inside, including batching bin, dense water filter, dense water filter sets up at one side of batching bin, one side of batching bin is equipped with the flue, one side of dense water filter is equipped with the pressure pump, the second connecting pipe is communicated between dense water filter and pressure pump, pressure pump one side is equipped with the third connecting pipe, the third connecting pipe is equipped with double -fluid atomization nozzle away from pressure pump one end, double -fluid atomization nozzle extends to double -fluid atomization nozzle inside.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization equipment technology, specifically to a concentrated water atomization desulfurization device for electric arc furnace flue. Background Technology

[0002] As a key piece of equipment in industrial production, submerged arc furnaces are widely used in the smelting processes of products such as ferroalloy and calcium carbide. During their operation, they generate large amounts of high-temperature flue gas containing pollutants, primarily SO2. Direct emission of this sulfur-containing flue gas would cause severe air pollution; therefore, desulfurization treatment of submerged arc furnace flue gas is a necessary step to meet environmental regulations and achieve green production. In practical applications, traditional flue gas desulfurization technology for submerged arc furnaces typically requires the following technologies and equipment: 1. Desulfurizing agent preparation system, used to prepare raw materials such as lime and hydrated lime into slurry or dry powder that can be used for desulfurization; 2. Spraying device: sprays the desulfurizing agent into the flue to react with the flue gas; 3. Wastewater treatment system to treat wastewater generated during the desulfurization process; 4. Control system, which regulates various parameters during the desulfurization process. The desulfurizing agent preparation system needs to be equipped with raw material storage tanks, stirring equipment, etc., to provide sufficient desulfurizing agent for the desulfurization reaction; the spraying device is installed in the flue and is responsible for evenly dispersing the desulfurizing agent into the flue gas; the wastewater treatment system is used to purify the wastewater containing impurities generated during desulfurization to avoid direct discharge and pollution. However, the above-mentioned implementation methods still have the following problems: On the one hand, they rely on desulfurizing agents such as lime and hydrated lime, which require continuous procurement and transportation, increasing raw material costs, and the preparation process of desulfurizing agents is relatively cumbersome; on the other hand, the cooling system of the electric arc furnace generates a large amount of high-hardness, high-alkalinity concentrated water. If this concentrated water is discharged directly, it will not only waste water resources, but may also cause water pollution due to the Ca²⁺ and Mg²⁺ ions it contains, which traditional technologies have failed to utilize. At the same time, the droplet size formed by traditional spray devices is relatively large, and the contact area with flue gas is limited, resulting in insufficient desulfurization reaction and low efficiency; moreover, there is a lack of a precise control mechanism that adjusts the desulfurization effect in real time according to parameters such as SO2 concentration and temperature in the flue gas, resulting in poor stability of the desulfurization effect. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a concentrated water atomization desulfurization device for submerged arc furnace flue gas. This solves the problems of existing devices relying on desulfurizing agents such as lime and hydrated lime, requiring continuous procurement and transportation, increasing raw material costs, and having a cumbersome desulfurizing agent preparation process. Furthermore, the submerged arc furnace cooling system generates a large amount of high-hardness, high-alkalinity concentrated water. Direct discharge of this concentrated water not only wastes water resources but may also cause water pollution due to the presence of Ca²⁺ and Mg²⁺ ions, which traditional technologies have failed to utilize. Simultaneously, traditional spray devices produce large droplet sizes with limited contact area with flue gas, resulting in incomplete desulfurization reactions and low efficiency. Moreover, they lack a precise control mechanism for real-time adjustment based on parameters such as SO₂ concentration and temperature in the flue gas, leading to poor stability in desulfurization performance.

[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a concentrated water atomization desulfurization device for a submerged arc furnace flue, comprising a batching box; a concentrated water filter, the concentrated water filter being disposed on one side of the batching box; a first connecting pipe, the first connecting pipe being fixedly connected between the batching box and the concentrated water filter; a flue is provided on one side of the batching box, a pressure pump is provided on one side of the concentrated water filter, a second connecting pipe is connected between the concentrated water filter and the pressure pump, a third connecting pipe is provided on one side of the pressure pump, a dual-fluid atomizing nozzle is provided at the end of the third connecting pipe away from the pressure pump, the dual-fluid atomizing nozzle extending into the interior of the dual-fluid atomizing nozzle; a compressed air delivery pipeline is provided outside the pressure pump, a compressed air regulating valve is installed on the compressed air delivery pipeline; a flow regulating valve is installed on the third connecting pipe, the flow regulating valve being located between the compressed air delivery pipeline and the pressure pump.

[0005] Preferably, the flue has an inlet pipe on one side and an outlet pipe on the side away from the inlet pipe, and the outlet pipe is equipped with descaling and dust removal equipment; an SO2 concentration sensor is installed inside the flue; a flue gas temperature sensor is installed inside the flue; and a support base is provided at the bottom of the batching box.

[0006] Compared with the prior art, this utility model provides a concentrated water atomization desulfurization device for electric arc furnace flue, which has the following beneficial effects: 1. Achieving resource recycling and reducing costs: This device utilizes high-hardness, high-alkalinity concentrated water generated by the submerged arc furnace cooling system to replace traditional desulfurizing agents such as lime and hydrated lime. The concentrated water is pretreated through a batching tank, fully utilizing the calcium and magnesium ions within it. This not only solves the problem of water waste and water pollution caused by direct discharge of concentrated water, but also eliminates the procurement, transportation, and preparation costs of traditional desulfurizing agents, significantly reducing the raw material costs of the desulfurization process.

[0007] 2. Ensuring the stability of desulfurization effect: By installing SO2 concentration sensors and flue gas temperature sensors inside the flue, flue gas parameters are monitored in real time. The automatic control system adjusts the flow regulating valve and compressed air regulating valve, achieving precise control of the ratio of concentrated water and compressed air flow. It can adjust the desulfurization reaction conditions in a timely manner according to changes in flue gas composition and temperature, ensuring the stability of desulfurization effect and avoiding the problem of desulfurization effect fluctuation caused by the lack of precise control in traditional desulfurization technology. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the flue structure of this utility model; Figure 4 This is a schematic diagram of the pressurization pump structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of the flue of this utility model; Figure 6 This is a schematic diagram of the internal structure of the flue of this utility model.

[0009] In the diagram: 1. Batching box; 2. Support base; 3. First connecting pipe; 4. Concentrate filter; 5. Second connecting pipe; 6. Booster pump; 7. Third connecting pipe; 8. Flow regulating valve; 9. Compressed air delivery pipeline; 10. Compressed air regulating valve; 11. Dual-fluid atomizing nozzle; 12. Flue; 121. Inlet pipe; 122. Exhaust pipe; 13. Denitrification and dust removal equipment; 14. SO2 concentration sensor; 15. Flue gas temperature sensor. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0011] like Figures 1 to 6 As shown, the technical solution in this application effectively solves the problems of traditional devices relying on desulfurizing agents such as lime and hydrated lime, which require continuous procurement and transportation, increasing raw material costs, and the desulfurizing agent preparation process is relatively cumbersome. On the other hand, the cooling system of the electric arc furnace generates a large amount of high-hardness, high-alkalinity concentrated water. If this concentrated water is discharged directly, it will not only waste water resources, but may also cause water pollution due to the Ca²⁺ and Mg²⁺ ions it contains, which traditional technologies have failed to utilize. At the same time, the droplet size formed by traditional spray devices is relatively large, and the contact area with flue gas is limited, resulting in insufficient desulfurization reaction and low efficiency; moreover, it lacks a precise control mechanism that adjusts in real time according to parameters such as SO2 concentration and temperature in the flue gas, resulting in poor stability of desulfurization effect. The overall approach is as follows: To address the problems existing in the prior art, this utility model provides a concentrated water atomization desulfurization device for a submerged arc furnace flue, comprising a batching box 1; a concentrated water filter 4, which is disposed on one side of the batching box 1; a first connecting pipe 3, which is fixedly connected between the batching box 1 and the concentrated water filter 4; a flue 12 is provided on one side of the batching box 1, and a pressure pump 6 is provided on one side of the concentrated water filter 4; a second connecting pipe 5 connects the concentrated water filter 4 and the pressure pump 6; a third connecting pipe 7 is provided on one side of the pressure pump 6, and a dual-fluid atomizing nozzle 11 is provided at the end of the third connecting pipe 7 away from the pressure pump 6, extending into the interior of the dual-fluid atomizing nozzle 11; a compressed air delivery pipe 9 is provided outside the pressure pump 6, and a compressed air regulating valve 10 is installed on the compressed air delivery pipe 9; a flow regulating valve 8 is installed on the third connecting pipe 7, located on the compressed air delivery pipe. Between channel 9 and pressurizing pump 6; This device utilizes high-hardness, high-alkalinity concentrated water generated by the electric arc furnace cooling system to replace traditional desulfurizing agents such as lime and hydrated lime. The concentrated water is pretreated through batching tank 1, making full use of calcium and magnesium ions in the concentrated water. This not only solves the problem of water waste and water pollution caused by direct discharge of concentrated water, but also saves the procurement, transportation, and preparation costs of traditional desulfurizing agents, significantly reducing the raw material cost of the desulfurization process; achieving resource recycling and cost reduction: This device utilizes high-hardness, high-alkalinity concentrated water generated by the electric arc furnace cooling system to replace traditional desulfurizing agents such as lime and hydrated lime. The concentrated water is pretreated through batching tank 1, making full use of calcium and magnesium ions in the concentrated water. This not only solves the problem of water waste and water pollution caused by direct discharge of concentrated water, but also saves the procurement, transportation, and preparation costs of traditional desulfurizing agents, significantly reducing the raw material cost of the desulfurization process.

[0012] A flue duct 12 has an inlet pipe 121 on one side and an outlet pipe 122 on the side away from the inlet pipe 121. A desulfurization and dust removal device 13 is installed on the outlet pipe 122. An SO2 concentration sensor 14 and a flue gas temperature sensor 15 are installed inside the flue duct 12. A support base 2 is provided at the bottom of the batching box 1. By installing the SO2 concentration sensor 14 and the flue gas temperature sensor 15 inside the flue duct 12, flue gas parameters are monitored in real time. The flow regulating valve 8 and the compressed air regulating valve 10 are adjusted by the automatic control system, which realizes precise control of the ratio of concentrated water and compressed air flow. The desulfurization reaction conditions can be adjusted in a timely manner according to the changes in flue gas composition and temperature, ensuring the stability of the desulfurization effect and avoiding the problem of fluctuating desulfurization effect caused by the lack of precise control in traditional desulfurization technology.

[0013] Structural Description: Batching Tank 1: Located at the beginning of the entire unit, it is mainly used to hold the high-hardness, high-alkalinity concentrate produced by the submerged arc furnace cooling system. A small amount of organic acid can be added to it to improve the activity of calcium and magnesium ions. Its outlet is connected to the concentrate filter 4 through the first connecting pipe 3, providing pretreated concentrate for subsequent treatment stages. Support base 2: Installed at the bottom of the mixing box 1, it serves to support and fix the mixing box 1, ensuring that the mixing box 1 remains stable during operation and avoiding positional displacement due to vibration or other factors. First connecting pipe 3: It is fixedly connected between the mixing tank 1 and the concentrate filter 4. It is a pipe component that connects the two and is used to transport the pretreated concentrate in the mixing tank 1 to the concentrate filter 4 for filtration. Concentrate filter 4: Located on one side of the mixing tank 1, and connected to the mixing tank 1 through the first connecting pipe 3. Its main function is to filter impurities in the concentrate, prevent impurities from entering subsequent equipment and causing blockage or damage, and ensure the cleanliness of the concentrate.

[0014] Second connecting pipe 5: Connected between concentrate filter 4 and booster pump 6, used to transport the concentrate filtered by concentrate filter 4 to booster pump 6, so as to realize the orderly flow of concentrate between equipment. Booster pump 6: Located on one side of concentrate filter 4, it receives concentrate from concentrate filter 4 through second connecting pipe 5. Its function is to pressurize the concentrate so that it can obtain sufficient pressure to pass smoothly through subsequent pipelines and equipment. The third connecting pipe 7 is connected at one end to the pressurizing pump 6 and at the other end to the dual-fluid atomizing nozzle 11. It is used to transport the concentrated water pressurized by the pressurizing pump 6 to the dual-fluid atomizing nozzle 11. It is a key conveying pipe for the concentrated water to enter the atomization process. Flow regulating valve 8: Installed on the third connecting pipe 7 and located between the compressed air delivery pipe 9 and the booster pump 6, it is mainly used to regulate the flow rate of concentrated water flowing through the third connecting pipe 7 and can change the amount of concentrated water delivered according to the instructions of the automatic control system.

[0015] Compressed air delivery pipe 9: One end is connected to an external compressed air source, and the other end is connected to a dual-fluid atomizing nozzle 11. Its function is to deliver compressed air to the dual-fluid atomizing nozzle 11 to provide the required compressed air for the atomization of concentrated water. Compressed air regulating valve 10: Installed on compressed air delivery pipeline 9, it is used to regulate the flow rate of compressed air flowing through compressed air delivery pipeline 9. It can change the delivery volume of compressed air according to the instructions of the automatic control system to match the concentrated water flow rate and achieve the best atomization effect. Dual-fluid atomizing nozzle 11: Its nozzle extends into the flue 12, receives concentrated water through the third connecting pipe 7, and receives compressed air through the compressed air delivery pipe 9. It can mix the concentrated water and compressed air, atomize them into tiny droplets, and spray them into the flue 12, so that the droplets can fully contact the flue gas. Flue 12: This is the main location for flue gas circulation and desulfurization reaction. It is equipped with a dual-fluid atomizing nozzle 11, an SO2 concentration sensor 14, and a flue gas temperature sensor 15. It receives the high-temperature flue gas to be treated through the inlet pipe 121. After the desulfurization reaction is completed, the flue gas is discharged through the exhaust pipe 122. Smoke inlet pipe 121: Located on one side of flue 12, it is the channel for high-temperature flue gas to enter flue 12, and introduces the sulfur-containing high-temperature flue gas generated by the electric arc furnace into flue 12 for desulfurization treatment. Exhaust pipe 122: Located on the side of flue 12 away from the inlet pipe 121, it is used to discharge the flue gas after the desulfurization reaction in flue 12 and transport it to the denitrification and dust removal equipment 13 for subsequent treatment. Denitrification and dust removal equipment 13: Installed on the flue gas pipe 122, it is used to denitrify and remove dust from the desulfurized flue gas discharged from the flue gas pipe 122, further purifying the flue gas so that it meets the emission standards. SO2 concentration sensor 14: Installed inside flue 12, it monitors the SO2 concentration in the flue gas in real time and transmits the monitoring data to the automatic control system, providing a basis for the system to adjust the flow rate of concentrate and compressed air. Flue gas temperature sensor 15: Located inside flue 12, it monitors the temperature of the high-temperature flue gas in flue 12 in real time, and the monitoring data is also transmitted to the automatic control system, assisting the system in achieving precise control of the desulfurization process.

[0016] The batching box 1, placed on the support base 2, is used to hold the high-hardness, high-alkalinity concentrate produced by the cooling system of the electric arc furnace. The operator adds a small amount of organic acid, such as citric acid, to the batching box 1 to improve the activity of calcium and magnesium ions and complete the pretreatment of the concentrate. The pretreated concentrate in the batching box 1 enters the concentrate filter 4 through the first connecting pipe 3. The concentrate filter 4 filters the concentrate to remove impurities and prevent clogging of subsequent equipment. The filtered concentrate is then transported to the pressurizing pump 6 through the second connecting pipe 5. The pressurizing pump 6 pressurizes the incoming concentrate to give it sufficient pressure to enter the subsequent pipeline. The pressurized concentrate is transported through the third connecting pipe 7. As it flows through the flow regulating valve 8 installed on the third connecting pipe 7, the flow regulating valve 8 adjusts the concentrate flow rate according to the instructions of the automatic control system. Compressed air is transported through the compressed air delivery pipe 9. As it flows through the compressed air regulating valve 10 on the compressed air delivery pipe 9, the compressed air regulating valve 10 adjusts the compressed air flow rate according to the instructions of the automatic control system. The concentrated water and compressed air, after flow regulation, enter the dual-fluid atomizing nozzle 11 together. After being fully mixed in the nozzle, they are atomized to form micron-sized droplets. The nozzle of the dual-fluid atomizing nozzle 11 extends into the flue 12, spraying the atomized droplets into the flue 12. At this time, the high-temperature flue gas enters the flue 12 through the inlet pipe 121. The atomized concentrated water droplets evaporate rapidly in the high-temperature flue gas, precipitating solid particles such as calcium carbonate and magnesium carbonate. These particles decompose into active calcium oxide and magnesium oxide at high temperatures, reacting with sulfur dioxide in the flue gas to generate solid products that flow with the flue gas. The SO2 concentration sensor 14 and flue gas temperature sensor 15 installed inside the flue 12 monitor the sulfur dioxide concentration and flue gas temperature in the flue gas in real time and transmit the monitoring data to the automatic control system. Based on the received data, the automatic control system adjusts the flow regulating valve 8 and the compressed air regulating valve 10 in real time to change the flow ratio of concentrated water and compressed air to ensure the desulfurization effect. The desulfurized flue gas is discharged through the exhaust pipe 122 on the side of the flue 12 away from the inlet pipe 121 and enters the denitrification and dust removal equipment 13 installed on the exhaust pipe 122 for further treatment, finally meeting the emission standards.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concentrated water atomization desulfurization device for a submerged arc furnace flue, comprising a batching box (1); A concentrate filter (4) is provided on one side of the mixing tank (1); The first connecting pipe (3) is fixedly connected between the mixing tank (1) and the concentrate filter (4); characterized in that: Also includes: The mixing box (1) is provided with a flue (12) on one side, and a pressure pump (6) is provided on one side of the concentrate filter (4). A second connecting pipe (5) is connected between the concentrate filter (4) and the pressure pump (6). A third connecting pipe (7) is provided on one side of the pressure pump (6). A dual-fluid atomizing nozzle (11) is provided at the end of the third connecting pipe (7) away from the pressure pump (6). The dual-fluid atomizing nozzle (11) extends into the interior of the dual-fluid atomizing nozzle (11). The pressurizing pump (6) is provided with a compressed air delivery pipe (9) on the outside, and a compressed air regulating valve (10) is installed on the compressed air delivery pipe (9).

2. The concentrated water atomization desulfurization device for a submerged arc furnace flue gas duct according to claim 1, characterized in that: A flow regulating valve (8) is installed on the third connecting pipe (7), and the flow regulating valve (8) is located between the compressed air delivery pipe (9) and the pressurizing pump (6).

3. The concentrated water atomization desulfurization device for a submerged arc furnace flue gas duct according to claim 1, characterized in that: The flue (12) has an inlet pipe (121) on one side and an exhaust pipe (122) on the side of the flue (12) away from the inlet pipe (121). The exhaust pipe (122) is equipped with a descaling and dust removal device (13).

4. The concentrated water atomization desulfurization device for a submerged arc furnace flue gas duct according to claim 1, characterized in that: The flue (12) is equipped with an SO2 concentration sensor (14).

5. The concentrated water atomization desulfurization device for a submerged arc furnace flue gas duct according to claim 4, characterized in that: The flue (12) is equipped with a flue gas temperature sensor (15).

6. The concentrated water atomization desulfurization device for a submerged arc furnace flue gas duct according to claim 1, characterized in that: The bottom of the mixing box (1) is provided with a support base (2).

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