Copper converter dust collection device induced by large space single-side high-speed jet

Abstract

The invention discloses a large-space single-sided high-speed jet-induced copper converter dust collection device, including a single-sided high-speed jet-induced device, through which the high-temperature dust generated by the pollution source is directionally transported to the top cover exhaust port. The device provided by the invention inhales the escaping dust, and after being accelerated by the fan, the dust jet entrains the escaping dust from the front side of the converter and also carries it to the roof cover, thereby achieving the effect of efficiently removing the high-temperature dust.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial pollutant control and relates to a copper converter smoke capture device induced by a large-space single-side high-speed jet. Background Art

[0002] Copper converter smelting often produces a large amount of high-temperature smoke, including sulfur dioxide and smoke particles, which endanger the health of workers. As the process operation proceeds, the instantaneous emission of converter smoke is large. Most of the high-temperature smoke can be captured by the process exhaust system (primary smoke) and the front-of-furnace ring exhaust system (secondary smoke), but there is still high-temperature smoke escaping from the door-type exhaust hood of the front-of-furnace ring. In order to capture the above-mentioned escaping smoke, engineering design often installs a roof exhaust hood on the top of the factory building. The roof exhaust hood is a large high-hanging hood installed on the top of the workshop, which can capture the high-temperature smoke escaping in the workshop. The roof hood has a certain effect in actual engineering use, but there are two main problems: the escaping smoke is affected by environmental factors such as ambient wind and obstacles, and the high-temperature smoke cannot flow to the roof hood in a directional manner, resulting in low capture efficiency; because the roof hood is far away from the emission source, in order to ensure the control effect of high-temperature smoke, the exhaust needs to be operated with a large air volume for a long time, resulting in excessive energy consumption.

[0003] In order to solve the problem of dust escape from copper converter, a large-space high-speed jet device needs to be designed to induce more dust to enter the roof cover and reduce the diffusion of dust in the factory. It has two functions: on the one hand, it reduces the influence of high-temperature dust on ambient airflow, and most of the dust can be transported to the roof cover, improving the dust collection efficiency of the roof cover; on the other hand, it reduces the exhaust volume of the roof cover, realizing energy saving and consumption reduction of the ventilation system. Summary of the invention

[0004] The purpose of the present invention is to provide a large-space single-sided high-speed jet-induced copper converter smoke capture device, which inhales the escaped smoke, and after being accelerated by a fan, the smoke jet sucks the smoke escaping from the front side of the converter and also carries it to the roof cover, thereby achieving the effect of efficiently removing high-temperature smoke.

[0005] The technical solution adopted by the present invention is a large-space single-sided high-speed jet-induced copper converter dust capture device, including a single-sided high-speed jet-induced device, through which the high-temperature smoke generated by the pollution source is directionally transported to the top cover exhaust port.

[0006] The present invention is also characterized in that:

[0007] The single-sided high-speed jet induction device includes an inlet section, a fan section and an outlet section which are arranged in sequence from low to high; the inlet section is used to monitor the high-temperature smoke concentration, the fan section is used to provide a high-speed jet, and the outlet section is used to ensure the outflow effect of the single-sided high-speed jet.

[0008] A smoke collecting hood is provided at the inlet section of the single-sided high-speed jet induction device. A smoke concentration sensor and an electric air valve are arranged in sequence inside the smoke collecting hood along the smoke entry direction. A fan suction port is arranged on one side of the smoke collecting hood.

[0009] The fan section of the single-sided high-speed jet induction device is provided with a fire-fighting high-temperature smoke exhaust fan, and the fire-fighting high-temperature smoke exhaust fan is located in the guide tube, and the bottom of the guide tube is connected to the top of the smoke collecting hood.

[0010] The fire-fighting high-temperature smoke exhaust fan comprises a motor, one end of a main shaft of the motor is connected to a guide vane, and the other end of the main shaft of the motor is connected to a cooling fan.

[0011] The outlet section of the single-sided high-speed jet induction device is provided with a single-sided arc baffle and a wave-shaped spoiler on opposite sides. The wave-shaped spoiler is used to drive the high-temperature smoke to flow; the single-sided arc baffle is used to shield the airflow on the ambient side.

[0012] A protective mesh cover is provided at the junction of the outlet section of the single-sided high-speed jet induction device and the guide tube, a single-sided arc baffle is installed at the upper end edge of the guide tube, and a wave-shaped spoiler is installed on the protective mesh cover.

[0013] The inclination angle of the fan air outlet relative to the horizontal plane is 60°.

[0014] The beneficial effects of the present invention are as follows:

[0015] (1) The single-sided high-speed jet induction device can suck the high-temperature smoke escaping from the secondary door cover of the copper converter and transport it to the inside of the roof cover in a direction, reducing the impact of ambient airflow in the large space, improving the capture efficiency of high-temperature smoke, and allowing the roof cover exhaust system to operate at a low air volume.

[0016] (2) A newly added single-sided high-speed jet induction device is equipped with a spoiler at the outlet of the high-speed jet induction device to carry more high-temperature smoke and dust into the roof cover through air flow disturbance. A single-sided arc baffle is set on the environment side to convert the high-speed free jet into a single-sided high-speed jet. This setting can reduce the entrainment of clean air in the environment and mainly entrain the escaped high-temperature smoke and dust.

[0017] (3) The single-sided high-speed jet induction device is interlocked with the copper converter charging process. The high-speed jet induction device is only turned on intermittently during the charging process to save electricity. In addition, a smoke concentration sensor is installed at the inlet section of the device. According to the concentration value at the inlet, the device's electric air valve is automatically adjusted to effectively match the smoke emission, device air supply and roof hood exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the copper converter smoke collection device induced by large-space single-side high-speed jet in the copper converter position of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a single-sided high-speed induced jet device in a large-space single-sided high-speed jet induced copper converter dust collection device of the present invention;

[0020] Figure 3 It is a partial enlarged view of the air outlet of the single-sided high-speed induced jet device of the present invention;

[0021] Figure 4 for Figure 2 sectional view of

[0022] Figure 5(a) is the SO2 concentration distribution diagram of the XOZ section of the plant without the single-sided high-speed jet induction device;

[0023] Figure 5(b) shows the SO2 concentration distribution in the YOZ section of the plant without the single-sided high-speed jet induction device;

[0024] Figure 5(c) shows the SO2 concentration distribution in the XOZ section of the plant with a single-sided high-speed induced jet device;

[0025] Figure 5(d) is the SO2 concentration distribution diagram of the YOZ section of the plant with a single-sided high-speed induced jet device;

[0026] Figure 6(a) is a cloud diagram of the SO2 mass fraction distribution of the conventional high-speed jet induction device;

[0027] FIG6( b ) is a cloud diagram showing the SO2 mass fraction distribution of the single-sided high-speed induced jet device in the large-space single-sided high-speed jet induced copper converter dust capture device of the present invention;

[0028] Figure 7 This is a comparison diagram of SO2 mass fractions on both sides of the jets of the single-sided high-speed induced jet device in the large-space single-sided high-speed jet induced copper converter dust capture device of the present invention.

[0029] In the figure, 1. roof cover exhaust vent, 2. traveling frame, 3. single-sided high-speed jet induction device, 4. pollution source, 5. guide bag, 6. single-sided arc baffle, 7. fan air supply port, 8. smoke collection hood, 9. fan air intake port, 10. motor, 11. guide vane, 12. cooling fan, 13. smoke concentration sensor, 14. wavy spoiler, 15. electric air valve, 16. protective mesh cover, 17. guide tube. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] The invention provides a large space single-side high-speed jet-induced copper converter dust collection device, such as Figure 1As shown, the guide bag 5 is connected to the hook of the traveling frame 2 to complete the dumping process. In this process, the high-temperature smoke (smoke temperature: about 800°C) generated by the pollution source 4 is directionally transported to the roof cover exhaust port 1 by the single-sided high-speed jet induction device 3, which can reduce the impact of environmental airflow in a large space, improve the capture efficiency of high-temperature smoke, and enable the roof cover exhaust system to operate at a low air volume.

[0033] The structure of the unilateral high-speed jet induction device 3 is as follows Figure 2 As shown, it includes an inlet section, a fan section and an outlet section. Its functions are as follows: the inlet section mainly monitors the concentration of high-temperature smoke, the fan of the fan section provides high-speed jets (jet speed: 10m / s) for the entire device, and the outlet section ensures the outflow effect of a single-sided high-speed jet.

[0034] Specifically, Figure 3 As shown, the fan air outlet 7 of the single-sided high-speed jet induction device 3 is provided with a single-sided arc baffle 6, a wave-shaped spoiler 14 and a protective mesh cover 16. The fan section uses a fire-fighting high-temperature smoke exhaust fan (HTF type axial flow fire-fighting smoke exhaust fan can be selected), which has good high-temperature resistance and can run continuously for more than 100 minutes under high temperature conditions of 400°C and continuously run for 20 hours under temperature conditions of 100°C without damage; the fire-fighting high-temperature smoke exhaust fan is located inside the guide tube 17.

[0035] Specifically, the inlet section of the single-sided high-speed jet induction device 3 is provided with a smoke collecting hood 8, such as Figure 4 As shown, a smoke concentration sensor 13 and an electric air valve 15 (an electric air volume regulating valve processed from ordinary Q235 plate) are arranged inside the smoke collecting hood 8;

[0036] The fire-fighting high-temperature smoke exhaust fan includes a motor 10, which is connected to a guide blade 11 and a cooling fan 12. The motor 10 and the guide blade 11 are connected to provide power for the airflow, and the cooling fan 12 is connected to the motor 10 to prevent the internal temperature of the fire-fighting high-temperature smoke exhaust fan from being too high.

[0037] The wave-shaped spoiler 14 is arranged on the side where the high-temperature smoke escapes, so that the high-speed jet on one side can drive more high-temperature smoke;

[0038] A protective mesh cover 16 is installed at the air outlet of the air outlet section of the single-sided high-speed jet induction device 3 to effectively prevent foreign matter from invading the interior of the fan and causing fan failure, and to prevent components from flying out and injuring people in the event of an internal failure.

[0039] The tuyere section of the unilateral high-speed jet induction device 3 is equipped with a unilateral arc-shaped baffle 6, which can shield the airflow on the ambient side, ensure that the jet form is a unilateral high-speed jet, so that the unilateral high-speed jet sucks the escaped high-temperature smoke and dust, and transports it to the inside of the roof cover in a direction, thereby improving the capture efficiency of the high-temperature smoke and dust, and realizing the low air volume operation of the roof cover exhaust system;

[0040] A smoke concentration sensor 13 is installed at the air outlet section of the single-sided high-speed jet induction device 3. The smoke concentration sensor 13 transmits real-time smoke concentration data to the control box of the fan motor 10, and the electric air valve 15 automatically adjusts the air valve opening according to the concentration value at the inlet;

[0041] The specific operation process of the single-sided high-speed jet induction device 3 is as follows: the high-temperature smoke generated by the pollution source 4 enters the device through the fan suction port 9 set at the smoke collecting hood 8, and the control box controls the opening of the electric air valve 15 according to the data monitored by the smoke concentration sensor 13, and then passes through the motor 10 and the guide vane 11, and finally is directed to the roof cover exhaust port 1 (there is a fan at the top cover exhaust port 1) through the single-sided arc baffle 6 and the wavy spoiler 14.

[0042] The angle of the fan air supply outlet 6 in the single-sided high-speed jet induction device 3 is 60°, so that the fan air supply outlet 6 is directly opposite to the roof cover exhaust outlet 1.

[0043] Its function is: the angle of the air outlet can make the high-speed jet sent by the fan directly face the exhaust port of the roof cover, which is more conducive to the directional transportation of high-temperature smoke and dust to the exhaust port of the roof cover, thereby improving the capture efficiency of the roof cover.

[0044] Example 2

[0045] In order to prove the effectiveness of the single-sided high-speed jet induction device, this embodiment uses numerical simulation to compare and analyze the control effect of the high-temperature smoke with and without the single-sided high-speed jet induction device. Table 1 is the analysis conditions of the numerical simulation.

[0046] Table 1. Numerical simulation conditions

[0047]

[0048] The boundary condition settings are shown in Table 2.

[0049] Table 2. Numerical simulation boundary condition parameters

[0050]

[0051] Compared with the case where the single-side high-speed jet induction device is not installed, the effect of the device on controlling the gaseous pollutant SO2 is significantly different. Figure 5(a) to Figure 5(d) . Figure 5(a) to Figure 5(d) It is the SO2 concentration distribution cloud diagram on the XOZ and YOZ mid-axis planes of the hood center.

[0052] Figure 5(a) , 5(b) It can be seen that a large amount of SO2 gas escapes from the roof cover, causing serious diffusion of pollutants in the top space of the plant. The SO2 concentration in the front of the converter is 5mg / m 3 The SO2 concentration escaping from the front side of the roof cover is 100 mg / m3 . Figure 5(c) , 5(d) It can be seen that under the action of the single-sided high-speed jet induction device, SO2 is mainly concentrated near the exhaust port inside the roof cover, and the amount of escape to the surrounding area is significantly reduced. The SO2 concentration at the front of the converter is 5mg / m 3 The SO2 concentration at the front of the roof cover is 5 mg / m 3 The high-speed jet induction device can effectively improve the capture efficiency of pollutants and achieve efficient capture of smoke and dust.

[0053] Example 3

[0054] In order to prove that the high-speed jet nozzle can achieve a certain degree of unilateral entrainment, two types of jet flow are provided - unilateral high-speed jet and free high-speed jet, and two numerical simulation methods are used for comparative analysis. Assume that the SO2 mass fraction of the fan air outlet is set to 1 and the mass fraction of the pressure outlet is set to 0. In this way, the SO2 mass fraction cloud map of the fan jet can be used to determine the jet entrainment state. Table 3 shows two simulation conditions, and the boundary conditions are set in Table 4.

[0055] Table 3. Simulation conditions

[0056] Working conditions Air outlet form Jet form Condition S-1 Free vent Free jet Condition S-2 One-side restricted air outlet One-side jet

[0057] Table 4. Numerical simulation boundary condition parameters

[0058]

[0059] Figures 6(a) and 6(b) show the SO2 mass fraction distribution cloud diagrams of the central section of the jet of two different high-speed jet induction devices. As shown in Figure 6(a), the surrounding fluid is symmetrically entrained under the action of the traditional high-speed induced jet. The SO2 mass fraction in the environment on both sides of the jet is 0.05, the SO2 mass fraction in the center of the jet is 0.6, and the SO2 mass fraction at the edges of both sides of the jet is 0.1. As shown in Figure 6(b), the SO2 mass fractions on both sides of the airflow are not the same under the action of the unilateral induced jet, indicating that the entrainment is asymmetric. The SO2 mass fractions in the environment on both sides of the jet are 0 and 0.05, respectively, the SO2 mass fraction in the center of the jet is 0.6, and the SO2 mass fractions at the edges of both sides of the jet are 0.1 and 0.05, respectively. Figure 7 It can be seen that the SO2 mass fraction of the jet ejected by the high-speed jet induction device with a single-sided baffle (single-sided arc baffle 6) on the baffle side is higher than that on the non-baffle side, with a maximum difference of 0.18. This shows that the single-sided high-speed jet induction device can achieve a small amount of ambient air entrainment.

Claims

1. A large-space, single-sided high-speed jet-induced copper converter dust collection device, characterized by: It comprises a single-sided high-speed jet induction device (3), which directionally transports high-temperature smoke generated by a pollution source (4) to a top hood exhaust port (1); The unilateral high-speed jet induction device (3) comprises an inlet section, a fan section and an outlet section which are arranged in sequence from low to high; the inlet section is used to monitor the concentration of high-temperature smoke, the fan section is used to provide a high-speed jet, and the outlet section is used to ensure the outflow effect of the unilateral high-speed jet; The inlet section of the single-sided high-speed jet induction device (3) is provided with a smoke collecting hood (8), the interior of the smoke collecting hood (8) is provided with a smoke concentration sensor (13) and an electric air valve (15) in sequence along the smoke entry direction, and a fan suction port (9) is provided on one side of the smoke collecting hood (8); The fan section of the single-sided high-speed jet induction device (3) is provided with a fire-fighting high-temperature smoke exhaust fan, which is located in the guide tube (17), and the bottom of the guide tube (17) is connected to the top of the smoke collecting hood (8); The fire-fighting high-temperature smoke exhaust fan comprises a motor (10), one end of the main shaft of the motor (10) is connected to the guide vane (11), and the other end of the main shaft of the motor (10) is connected to the cooling fan (12); The outlet section of the single-sided high-speed jet induction device (3) is provided with a single-sided arc-shaped baffle (6) and a wave-shaped spoiler (14) on opposite sides, respectively; the wave-shaped spoiler (14) is used to drive the high-temperature smoke to flow; and the single-sided arc-shaped baffle (6) is used to shield the airflow on the ambient side; A protective mesh cover (16) is provided at the junction of the outlet section of the single-sided high-speed jet induction device (3) and the guide tube (17), a single-sided arc-shaped baffle (6) is installed at the upper edge of the guide tube (17), and a wavy spoiler (14) is installed on the protective mesh cover (16); The fan air outlet (7) has an inclination angle of 60° relative to the horizontal plane.

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