Flue gas water bath dust removal device for converter air quenching pool and converter

Abstract

The utility model belongs to the technical field of converter dust treatment, and particularly relates to a flue gas water bath dust removal device for a converter air quenching pool and a converter, which comprise a dust collecting cover, a spraying device, a dust collecting smoke pipe, an exhaust pipe, a baffling demister, an exhaust fan, a water conveying pipe, a water discharging pipe and at least one filtering water tank. The flue gas water bath dust removal device disclosed by the utility model is mounted on an upper opening of a converter air quenching pool, the discharge amount of air quenching slag smoke dust can be greatly reduced, the spray water of the device can be recycled and is very convenient to replace, and only old spray water and dust need to be pumped out of the filtering water tank together, and then clean spray water is added. The device is simple in structure and low in manufacturing and operating cost.

Description

Technical Field

[0001] This utility model belongs to the field of converter dust treatment technology, specifically relating to a flue gas water bath dust removal device for a converter air quenching pool and a converter. Background Technology

[0002] In the smelting of nickel-iron ore, it is first calcined in a rotary kiln to form roasted ore. Then, a converter is used to further reduce and smelt the roasted ore produced in the rotary kiln to obtain crude nickel-iron alloy. During the converter smelting process, molten iron is quenched in the converter to form slag liquid, with a temperature of approximately 800℃-1000℃. This slag liquid is then transferred to an air quenching tank for cooling. The air quenching tank is a semi-open space with powerful fans that directly blow cooling air onto the high-temperature slag liquid. This cooling process generates a large amount of particulate dust at around 200℃. This dust emission into the air causes serious air pollution and affects the working environment of workers in the smelting section, failing to meet environmental protection and safety production requirements. The commonly used dust removal method for converter air quenching slag in existing technology is the installation of pulse-jet bag filters. However, this device is not only expensive to purchase, but also prone to filter clogging when encountering larger particles, requiring frequent cleaning and replacement of the filter elements, making maintenance difficult and operating costs high. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a water bath dust removal device for converter air-quenched slag flue gas, specifically including the following:

[0004] A flue gas water bath dust removal device for a converter quenching tank includes a dust collection hood, a spray device, a dust collection pipe, an exhaust pipe, a baffle demister, an exhaust fan, a water supply pipe, a drain pipe, and at least one filter water tank. The dust collection hood covers the opening of the converter quenching tank and has a dust outlet. The left and right sides of the dust collection hood collect the dust from above the opening of the converter quenching tank. The spray device has a spray exhaust port at the top, a spray dust inlet below the top, and a spray drain outlet at the bottom. The spray device contains at least one set of annular water spray devices, each with a water inlet and multiple spray nozzles. The function of the spray device is to allow the dust to meet the atomized water vapor, causing the water vapor to condense into dust, which then falls to the bottom of the spray device, reducing the dust content in the exhaust gas. One end of the dust collection pipe is connected to the dust outlet, and the other end is connected to the spray dust inlet. One end of the exhaust pipe is connected to the spray exhaust port via a baffle demister, and the other end is connected to the exhaust fan. The baffle demister has a multi-layered bending structure to prevent water mist from entering the exhaust pipe and the exhaust fan. The filter water tank is equipped with a filter water tank inlet and at least one filter water tank outlet. The filter water tank inlet is connected to the spray exhaust outlet via a drain pipe, and the filter water tank outlet is connected to the spray water inlet via a water supply pipe. The filter water tank can filter and purify the spray water and resupply the filtered spray water to the spray, realizing the recycling of the spray water. In actual use, the water in the filter water tank can be replaced as needed. It should be noted that the "water bath" mentioned in this utility model refers to the process where dust in the smoke and dust encounters the spray water inside the spray device, and the dust is adsorbed by the water droplets and falls, or the dust adsorbs the water droplets and the density increases, causing it to fall, thereby reducing the dust in the smoke and dust, achieving an effect similar to water bath cleaning.

[0005] Furthermore, the dust collection hood is an inverted funnel shape, and the dust outlet is located at the top of the dust collection hood. The size of the dust collection hood needs to completely cover the opening of the air quenching tank to prevent dust from overflowing.

[0006] Furthermore, the bottom of the spraying device is funnel-shaped, and the spray drain outlet is located at the bottom end of the funnel-shaped spraying device. Positioning the spray drain outlet at the bottom end of the spraying device ensures that it is located at or near the lowest point of the spraying device, guaranteeing that the spray water can be discharged promptly and completely.

[0007] Furthermore, the dust inlet is located at the bottom of the spraying device, either near the lowest point or at another suitable location. Dust enters the spraying device from below. Due to the low overall density of the dust, it moves upward inside the spraying device, while the spray water moves downward. The dust and spray water are in countercurrent contact, which ensures the best water bath dust removal effect.

[0008] Furthermore, the inner wall of the spraying device is provided with multiple sets of annular water spraying devices. The outer side of the annular water spraying device is connected to the inner wall of the spraying device, and the inner side is provided with multiple water spray nozzles. The water spraying direction of the water spray nozzles is inclined downward.

[0009] Furthermore, the multiple sets of annular water spray devices are distributed in multiple layers along the height direction of the spray device, achieving a multi-layer water bath dust removal effect; and / or, the multiple water spray nozzles are evenly distributed along the circumference of the annular water spray device to ensure uniform distribution of the sprayed water mist and ensure the best water bath dust removal effect; and / or, the water spray direction of the water spray nozzles is inclined downward, preferably at an angle of 40°-60° with the horizontal direction, to ensure that the spray surface can radially cover the spray device and ensure that the dust passing through the center of the spray device can also fully contact the water mist.

[0010] Furthermore, the height of the dust inlet of the spray system is lower than the height of the dust outlet, and the inclination angle of the dust collection pipe relative to the horizontal direction is 5°-10°. This configuration prevents dust from accumulating and clogging the dust collection pipe, because the deposited dust will enter the spraying device from the dust collection pipe along the inclined direction, and finally be discharged from the bottom of the spraying device together with the spray water.

[0011] Furthermore, the system includes at least three sequentially connected filtration tanks, with filtration devices installed between adjacent filtration tanks. The inlet of each filtration tank is located on the first-stage filtration tank, and the outlet of each filtration tank is located on the last-stage filtration tank. Using multiple filtration tanks ensures effective filtration.

[0012] Furthermore, a water pump is installed on the water supply pipe.

[0013] Furthermore, the spray nozzle is equipped with an atomizing nozzle to ensure that the sprayed water achieves the best atomization effect, thereby further ensuring the water bath dust removal effect of the flue gas.

[0014] The present invention also includes a converter with the aforementioned flue gas water bath dust removal device.

[0015] The beneficial effects of this utility model are:

[0016] (1) The flue gas water bath dust removal device disclosed in this utility model includes a spraying device. The function of the spraying device is to allow the flue gas dust to meet the atomized water vapor, causing the water vapor to condense the dust and fall into the bottom of the spraying device, thereby achieving the effect of water bath dust removal and reducing the dust content in the exhaust gas. The spraying exhaust port of this device is equipped with a baffle demister. The baffle demister has a multi-layer bending structure inside, which can prevent water mist from entering the exhaust pipe and exhaust fan. This device connects the spraying water to a filter water tank, which can filter and purify the spraying water and then resupply the filtered spraying water to the spraying system, realizing the recycling of the spraying water. In actual use, the water in the filter water tank can be replaced as needed.

[0017] (2) The bottom of the spray device in the flue gas water bath dust removal device disclosed in this utility model is funnel-shaped, and the spray drain outlet is set at the bottom of the funnel-shaped spray device, which can ensure that it is located at the lowest point or near the lowest point of the bottom of the spray device, so as to ensure that the spray water can be discharged in time and drained.

[0018] (3) The dust inlet of the flue gas water bath dust removal device disclosed in this utility model is located at the bottom of the spray device, which can be near the lowest point or other suitable positions. The dust enters the interior of the spray device from below. Since the overall density of the dust is small, the dust moves upward inside the spray device, while the spray water moves downward. The dust and the spray water are in countercurrent contact, which can ensure the best water bath dust removal effect.

[0019] (4) The multiple sets of annular water spray devices of the flue gas water bath dust removal device disclosed in this utility model are distributed in multiple layers along the height direction of the spray device, which can achieve a multi-layer water bath dust removal effect. Multiple water nozzles are evenly distributed along the circumference of the annular water spray devices, ensuring uniform distribution of the sprayed water mist and guaranteeing the best water bath dust removal effect. The water spray direction of the nozzles is inclined downwards, preferably at an angle of 40°-60° to the horizontal direction, ensuring that the spray surface can radially cover the spray device, and ensuring that the flue gas dust passing through the center of the spray device can also fully contact the water mist. This device is equipped with at least three sequentially connected filter water tanks to ensure the filtration effect.

[0020] (5) Installing the flue gas water bath dust removal device disclosed in this invention onto the opening of the converter air quenching tank can significantly reduce the emission of air quenching slag dust. Moreover, the spray water of this device can be recycled and is easy to replace. Simply pump the old spray water and dust out of the filter water tank and add clean spray water. This device has a simple structure and low manufacturing and operating costs. Attached Figure Description

[0021] Figure 1 This is a front structural diagram of the device disclosed in this utility model;

[0022] Figure 2 This is a side view of the device disclosed in this utility model.

[0023] Figure 3 This is a top view of the spraying device, water filter tank, and other devices in the apparatus disclosed in this utility model;

[0024] Figure 4 This is a schematic diagram of the annular water spray device in the spraying device of this utility model. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments shown below do not limit the scope of the utility model as described in the claims. Furthermore, the complete contents of the configurations shown in the following embodiments are not limited to those necessary for the solution of the utility model as described in the claims.

[0026] Reference Appendix Figure 1-4 A flue gas water bath dust removal device for a converter quenching tank includes a dust collection hood 1, a spray device 3, a dust collection flue pipe 2, an exhaust pipe 4, a baffle demister 5, an exhaust fan 6, a water supply pipe 9, a drain pipe 8, and at least one filter water tank 7. The dust collection hood 1 covers the opening of the converter quenching tank and has a dust outlet. The left and right sides of the dust collection hood 1 collect the dust from above the opening of the converter quenching tank. The spray device 3 has a spray exhaust port at the top, a spray dust inlet below the top, and a spray drain outlet at the bottom. The spray device 3 has at least one set of annular water spray devices inside, each with a water inlet and multiple spray nozzles. The function of the spray device 3 is to allow the dust to meet the atomized water vapor, causing the water vapor to condense into dust, which then falls to the bottom of the spray device 3, reducing the dust content in the exhaust gas. One end of the dust collection pipe 2 is connected to the dust outlet, and the other end is connected to the spray dust inlet. One end of the exhaust pipe 4 is connected to the spray exhaust port via a baffle demister 5, and the other end is connected to the exhaust fan 6; the baffle demister has a multi-layered bending structure to prevent water mist from entering the exhaust pipe 4 and the exhaust fan 6. The filter water tank 7 is equipped with a filter water tank 7 inlet and at least one filter water tank 7 outlet. The filter water tank 7 inlet is connected to the spray exhaust outlet via a drain pipe 8, and the filter water tank 7 outlet is connected to the spray water inlet via a water supply pipe. The filter water tank 7 can filter and purify the spray water and resupply the filtered spray water to the spray, realizing the recycling of the spray water. In actual use, the water in the filter water tank 7 can be replaced as needed.

[0027] In some embodiments of this utility model, the dust collection hood 1 is an inverted funnel shape, and the dust outlet is located at the top of the dust collection hood 1. The size of the dust collection hood 1 needs to completely cover the opening of the air quenching tank to prevent dust from overflowing.

[0028] In some embodiments of this utility model, the bottom of the spray device 3 is funnel-shaped, and the spray drain outlet is located at the bottom end of the funnel-shaped spray device 3. The location of the spray drain outlet at the bottom end of the spray device 3 ensures that it is at or near the lowest point of the spray device 3, guaranteeing that the spray water can be discharged promptly and completely.

[0029] In some embodiments of this utility model, the spray dust inlet is located at the bottom of the spray device 3, either near the lowest point or at another suitable location. Dust enters the spray device 3 from below. Due to the low overall density of the dust, it moves upward inside the spray device 3, while the spray water moves downward. The dust and spray water are in countercurrent contact, which ensures the best water bath dust removal effect.

[0030] In some embodiments of this utility model, the inner wall of the spraying device 3 is provided with multiple sets of annular water spraying devices. The outer side of the annular water spraying device is connected to the inner wall of the spraying device 3, and the inner side is provided with multiple water spray nozzles. The water spraying direction of the water spray nozzles is inclined downward.

[0031] In some embodiments of this utility model, the multiple sets of annular water spray devices are distributed in multiple layers along the height direction of the spray device 3 to achieve a multi-layer water bath dust removal effect; and / or, the multiple water spray nozzles are evenly distributed along the circumference of the annular water spray device to ensure that the sprayed water mist is evenly distributed and to ensure the best water bath dust removal effect; and / or, the water spray direction of the water spray nozzles is inclined downward, and the water spray direction is preferably at an angle of 40°-60° with the horizontal direction to ensure that the spray surface can radially cover the spray device 3 and ensure that the smoke and dust passing through the center of the spray device 3 can also fully contact the water mist.

[0032] In some embodiments of this invention, the height of the spray dust inlet is lower than the height of the dust outlet, and the inclination angle of the dust collection pipe 2 relative to the horizontal direction is 5°-10°. This arrangement prevents dust from accumulating in the dust collection pipe 2 and clogging it, because the deposited dust will enter the spray device 3 from the dust collection pipe 2 along the inclined direction, and finally be discharged from the bottom of the spray device 3 together with the spray water.

[0033] In some embodiments of this utility model, at least three sequentially connected filter tanks 7 are included, with a filtration device provided between adjacent filter tanks 7. The inlet of each filter tank 7 is located on the first-stage filter tank 7, and the outlet of each filter tank 7 is located on the last-stage filter tank 7. The use of multiple filter tanks 7 ensures effective filtration.

[0034] In some embodiments of this utility model, a water pump 11 is provided on the water supply pipe.

[0035] In some embodiments of this utility model, an atomizing nozzle 12 is provided at the water spray nozzle to ensure that the sprayed water achieves the best atomization effect and further ensures the water bath dust removal effect of the flue gas.

[0036] When using the device disclosed in this utility model, the exhaust fan 6 and the water pump are turned on simultaneously. The exhaust air draws in air, creating a negative pressure throughout the device. Dust from the quenching tank enters the spraying device 3 from bottom to top through the dust collection hood 1 and dust collection pipe 2. The annular water spray device in the spraying device 3 continuously sprays water mist. The water mist moves downwards within the spraying device 3. In the spraying device 3, the dust and water mist meet in a counter-current flow. The dust particles in the dust continuously collide with the water mist, adsorbing small water droplets from the water mist, causing them to increase in mass and move downwards with the water droplets, falling to the bottom of the spraying device 3. The water then flows with the sprayed water through the drain pipe 8 into the filter water tank 7, where it is filtered and returned for reuse. The treated gas is discharged from the spray exhaust port at the top of the spraying device 3, and then discharged through the exhaust pipe 4 and the exhaust fan 6. This device removes dust from the flue gas and also removes water-soluble harmful gases from the gas, reducing air pollution.

[0037] Installing the flue gas water bath dust removal device disclosed in this invention onto the opening of the converter air quenching tank can significantly reduce the emission of air quenching slag dust. Furthermore, the spray water in this device can be recycled and is easy to replace; simply pump the old spray water along with the dust from the filter water tank and add clean spray water. This device has a simple structure and low manufacturing and operating costs.

[0038] In the description of this application, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flue gas water bath dust removal device for a converter air quenching pool, characterized in that, The device comprises a dust collecting hood, a spraying device, a dust collecting pipe, an exhaust pipe, a baffle demister, an exhaust fan, a water delivery pipe, a water discharge pipe, and at least one filter water tank. The dust collecting hood covers the opening of the converter air quenching pool, and the dust outlet is arranged on the dust collecting hood. The top of the spraying device is provided with a spraying exhaust port, the bottom is provided with a spraying water discharge port, and the inside of the spraying device is provided with at least one set of annular water spraying device. One end of the dust collecting pipe is connected with the dust outlet, and the other end is connected with the spraying dust inlet. One end of the exhaust pipe is connected with the spraying exhaust port through the baffle demister, and the other end is connected with the exhaust fan. The filter water tank is provided with a filter water tank water inlet and at least one filter water tank water outlet.

2. A flue gas water bath dust removal device for a converter air quenching tank according to claim 1, characterized in that, The dust collecting hood is a reversed funnel shape, and the dust outlet is arranged at the top of the dust collecting hood.

3. A flue gas water bath dust removal device for a converter air quenching tank according to claim 1, characterized in that, The bottom of the spraying device is a funnel shape, and the spraying water discharge port is arranged at the bottom end of the funnel-shaped spraying device bottom.

4. A flue gas water bath dust removal device for a converter air quenching tank according to claim 3, characterized in that, The spraying dust inlet is arranged at the bottom of the spraying device.

5. A flue gas water bath dedusting device for a converter air quenching tank according to claim 4, characterized in that, The inner wall of the spraying device is provided with a plurality of sets of annular water spraying devices, the outer side of the annular water spraying device is connected with the inner wall of the spraying device, the inner side is provided with a plurality of water spraying ports, and the water spraying direction of the water spraying port is inclined downward.

6. A flue gas water bath dedusting device for a converter air quenching tank according to claim 5, characterized in that, The plurality of sets of annular water spraying devices are distributed in multiple layers along the height direction of the spraying device; and / or, the plurality of water spraying ports are uniformly distributed along the circumference of the annular water spraying device; and / or, the water spraying direction of the water spraying port is inclined downward.

7. A flue gas water bath dust removal device for a converter air quenching tank according to claim 1, characterized in that, The height of the spraying dust inlet is lower than the height of the dust outlet, and the inclination angle of the dust collecting pipe relative to the horizontal direction is 5°-10°.

8. A flue gas water bath dedusting device for a converter air quenching tank according to claim 1, characterized in that, The device comprises at least three filter water tanks connected in sequence, and a filter device is arranged between adjacent filter water tanks.

9. A flue gas water bath dedusting device for a converter air quenching tank according to claim 1, characterized in that, A water pump is arranged on the water delivery pipe.

10. The flue gas water scrubbing dedusting device for the wind quenching pool of the converter as claimed in any one of claims 1-9, characterized in that, An atomizing nozzle is arranged at the water spraying port.

11. A converter characterized by The device comprises the flue gas water bath dust collecting device of any one of claims 1-10.

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