Blast furnace slag flue gas spraying and dehumidifying device

Abstract

The utility model relates to a blast furnace slag flue gas spraying and dehumidifying device, and belongs to the technical field of blast furnace slag granulation flue gas treatment. According to the technical scheme, a first demisting mechanism is arranged in a tower body of the granulation tower, a second demisting mechanism is arranged above the first demisting mechanism, a baffle plate is arranged above the second demisting mechanism, a high-pressure washing unit is arranged above the baffle plate, and the high-pressure washing unit is arranged above the high-pressure washing unit. The lower parts of the high-pressure flushing unit, the demisting mechanism II and the demisting mechanism I are respectively matched with respective temperature sensors, and water collecting rings are respectively arranged below the temperature sensors of the demisting mechanism I, the demisting mechanism II and the high-pressure flushing unit in the granulation tower body. The device disclosed by the utility model is simple in equipment and low in investment, carries out white smoke removal treatment on flue gas generated in the granulation process, can cope with different flue gas amounts according to working conditions, avoids direct emission of white smoke generated in the granulation process, and dredges condensed sewage through the water collecting ring, so that the energy consumption is reduced, and the energy consumption is reduced. And the corrosion damage of the flue gas generated in the granulation process to the equipment is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a blast furnace slag flue gas spraying and dehumidifying device, belonging to the technical field of blast furnace slag granulation flue gas treatment. Background Art

[0002] Blast furnace slag is a solid waste formed during blast furnace smelting by gangue in ore, ash in fuel and non-volatile components in solvent. Normally, water flushing is used to treat blast furnace slag, but during water quenching and granulation, the contact and heat exchange between water and slag will generate a large amount of water vapor. The conventional treatment method for the water vapor generated at this time is to discharge it into the air through a chimney. The water vapor generated contains sulfur and has certain corrosiveness, which not only seriously pollutes the surrounding environment but also damages the equipment itself. At the same time, the discharge of water vapor also causes a large amount of water resource waste. To solve the above problems, Chinese patent CN202210246439.7 discloses a "blast furnace slag water quenching and flue gas treatment tower system". The flue gas generated during the granulation process is cooled once by spraying cooling water through a cooling atomizing device provided in the slag water quenching granulation tower. Then, it is treated twice by a baffle demister provided above the cooling atomizing device. Then, it is treated three times by a flue gas heating device provided above the baffle demister. Finally, it is treated four times by a flue gas standby direct mixing heating device according to the on-site environmental conditions, thereby achieving the condensation and absorption of the water vapor rising during the water quenching process and achieving the flue gas dewhitening effect. However, its structure is complex, the investment cost is high, it has many pipelines, and the maintenance cost is high. Utility Model Content

[0003] The purpose of the utility model is to provide a blast furnace slag flue gas spraying and dehumidification device, which has simple equipment and low investment, and can dewhiten the flue gas generated in the granulation process. It can deal with different flue gas volumes according to working conditions, avoid the direct discharge of white smoke generated in the granulation process, and drain the condensed sewage through a water collecting ring, thereby greatly reducing the corrosion damage to the equipment caused by the flue gas generated in the granulation process. It is more energy-saving, environmentally friendly, durable, and solves the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A blast furnace slag flue gas spraying and dehumidification device comprises a granulation tower body, wherein a demisting mechanism 1 is provided inside the granulation tower body, a demisting mechanism 2 is provided above the demisting mechanism 1, a baffle is provided above the demisting mechanism 2, a high-pressure flushing unit is provided above the baffle, and respective temperature sensors are matched below the high-pressure flushing unit, the demisting mechanism 2 and the demisting mechanism 1, and water collecting rings are provided below the temperature sensors of the demisting mechanism 1, the demisting mechanism 2 and the high-pressure flushing unit in the granulation tower body.

[0006] Furthermore, the demisting mechanism 1 includes an annular water supply pipe 1, a demisting spray gun 1, a demisting spray gun 2 and a demisting spray gun 3. The annular water supply pipe 1 is arranged around the circumference of the granulating tower body. The demisting spray gun 1, the demisting spray gun 2 and the demisting spray gun 3 are respectively connected to the annular water supply pipe 1 and horizontally enter the granulating tower body. The demisting spray gun 1 is the longest and penetrates into the center of the granulating tower body. The length of the demisting spray gun 2 is shorter than that of the demisting spray gun 1, and the length of the demisting spray gun 3 is shorter than that of the demisting spray gun 2. The structures of the demisting mechanism 1 and the demisting mechanism 2 are the same. ; The high-pressure flushing unit includes an annular water supply pipe 2, a high-pressure flushing spray gun 1, a high-pressure flushing spray gun 2 and a high-pressure flushing spray gun 3. The annular water supply pipe 2 is arranged around the circumference of the granulating tower body. The high-pressure flushing spray gun 1, the high-pressure flushing spray gun 2 and the high-pressure flushing spray gun 3 are respectively connected to the annular water supply pipe 2 and enter the granulating tower body horizontally. The high-pressure flushing spray gun 1 is the longest and penetrates into the center of the granulating tower body. The length of the high-pressure flushing spray gun 2 is less than that of the high-pressure flushing spray gun 1, and the length of the high-pressure flushing spray gun 3 is less than that of the high-pressure flushing spray gun 2.

[0007] Furthermore, the number of the demisting spray gun one, the demisting spray gun two and the demisting spray gun three is more than one, and the ends of the demisting spray gun one, the demisting spray gun two and the demisting spray gun three are all provided with demisting nozzles.

[0008] Furthermore, the number of the high-pressure flushing spray gun 1, the high-pressure flushing spray gun 2 and the high-pressure flushing spray gun 3 is more than one, and the ends of the high-pressure flushing spray gun 1, the high-pressure flushing spray gun 2 and the high-pressure flushing spray gun 3 are all provided with high-pressure flushing nozzles.

[0009] Furthermore, the temperature sensor controls the opening and closing of the high-pressure flushing unit, the second demisting mechanism and the nozzle on the first demisting mechanism in a chain manner.

[0010] Furthermore, the water collecting ring is an inverted cone cylinder structure, and the angle between the inverted cone cylinder and the inner wall of the granulation tower body is between 10-45 degrees.

[0011] Furthermore, the sizes of the water collecting ring increase from top to bottom.

[0012] Furthermore, a pressure sensor is provided below the baffle; the baffle is disc-shaped and installed in the granulating tower body; the baffle is composed of a plurality of zigzag metal plates, and the gaps between the metal plates allow blast furnace flue gas to pass through.

[0013] Furthermore, platforms are provided on the outside of the granulation tower bodies corresponding to the demisting mechanism 1, the demisting mechanism 2 and the high-pressure flushing unit.

[0014] Furthermore, the granulation tower body is cylindrical or conical, and the upper part of the granulation tower body has only one opening.

[0015] The flue gas generated during the granulation process is washed and cleaned by Demisting Mechanism 1, then repeatedly cleaned by Demisting Mechanism 2 to remove solid impurities, collect water and remove mist, and then condense through the baffles before continuing to the area where the high-pressure flushing unit is located. The high-pressure flushing unit can clean the baffles to prevent them from clogging, and the flushing unit can further clean the flue gas. The temperature sensor interlocks and controls the demisting nozzles on Demisting Mechanism 1, Demisting Mechanism 2, and the high-pressure flushing unit to collect water and remove mist according to different flue gas volumes according to working conditions. The condensed water is channeled through the water collection ring to the condensed sewage, preventing it from corroding the granulation tower itself, thereby achieving the flue gas whitening effect.

[0016] The beneficial effects of the utility model are as follows: the equipment is simple and the investment is small. The flue gas generated in the granulation process is de-whitened. Different flue gas volumes are handled according to working conditions, thereby avoiding direct discharge of white smoke generated in the granulation process. The condensed sewage is drained through the water collecting ring, thereby greatly reducing the corrosion damage to the equipment caused by the flue gas generated in the granulation process. The utility model is more energy-saving, environmentally friendly and durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 A top view of an embodiment of the present utility model;

[0019] Figure 3 This is a structural diagram of a demisting mechanism according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of the second demisting mechanism of an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the baffle structure of an embodiment of the utility model;

[0022] Figure 6 This is a schematic structural diagram of a high-pressure flushing unit according to an embodiment of the present utility model;

[0023] In the figure: granulation tower body 1, platform 11, demisting mechanism 1 2, demisting spray gun 1 21, demisting spray gun 2 22, demisting spray gun 3 23, demisting nozzle 24, annular water supply pipe 1 25, demisting mechanism 2 3, baffle 4, metal plate 41, gap 42, high-pressure flushing unit 5, high-pressure flushing spray gun 1 51, high-pressure flushing spray gun 2 52, high-pressure flushing spray gun 3 53, high-pressure flushing nozzle 54, annular water supply pipe 2 55, temperature sensor 6, pressure sensor 7, water collecting ring 8. DETAILED DESCRIPTION

[0024] The present invention will be further described below through embodiments with reference to the accompanying drawings.

[0025] Refer to the attached Figure 1-6 A blast furnace slag flue gas spraying and dehumidification device includes a granulation tower body 1, a demisting mechanism 2 is provided inside the granulation tower body 1, a demisting mechanism 2 is provided above the demisting mechanism 2, a baffle 4 is provided above the demisting mechanism 2 3, a high-pressure flushing unit 5 is provided above the baffle 4, and the high-pressure flushing unit 5, the demisting mechanism 2 3 and the demisting mechanism 1 2 are respectively matched with their own temperature sensors 6, and water collection rings 8 are respectively provided below the temperature sensors 6 of the demisting mechanism 1 2, the demisting mechanism 2 3 and the high-pressure flushing unit 5 in the granulation tower body 1.

[0026] The demisting mechanism 1-2 comprises an annular water supply pipe 1-25, a demisting spray gun 1-21, a demisting spray gun 2-22 and a demisting spray gun 3-23. The annular water supply pipe 1-25 is arranged around the outer circumference of the granulating tower body 1. The demisting spray gun 1-21, the demisting spray gun 2-22 and the demisting spray gun 3-23 are respectively connected to the annular water supply pipe 1-25 and horizontally enter the granulating tower body 1. The demisting spray gun 1-21 is the longest and penetrates into the center of the granulating tower body 1. The length of the demisting spray gun 2-22 is shorter than that of the demisting spray gun 1-21, and the length of the demisting spray gun 3-23 is shorter than that of the demisting spray gun 2-22. The structures of the demisting mechanism 1-2 and the demisting mechanism 2-3 are the same. The high-pressure flushing unit 5 includes an annular water supply pipe 2 55, a high-pressure flushing spray gun 1 51, a high-pressure flushing spray gun 2 52 and a high-pressure flushing spray gun 3 53. The annular water supply pipe 2 55 is arranged around the outer circumference of the granulation tower body 1. The high-pressure flushing spray gun 1 51, the high-pressure flushing spray gun 2 52 and the high-pressure flushing spray gun 3 53 are respectively connected to the annular water supply pipe 2 55 and enter the granulation tower body 1 horizontally. The high-pressure flushing spray gun 1 51 is the longest and penetrates into the center of the granulation tower body 1. The length of the high-pressure flushing spray gun 2 52 is smaller than that of the high-pressure flushing spray gun 1 51, and the length of the high-pressure flushing spray gun 3 53 is smaller than that of the high-pressure flushing spray gun 2 52.

[0027] The number of the demisting spray gun 1 21 , the demisting spray gun 2 22 and the demisting spray gun 3 23 is more than one, and the ends of the demisting spray gun 1 21 , the demisting spray gun 2 22 and the demisting spray gun 3 23 are all provided with a demisting nozzle 24 .

[0028] The number of the high-pressure flushing spray gun 1 51 , the high-pressure flushing spray gun 2 52 and the high-pressure flushing spray gun 3 53 is more than one, and the ends of the high-pressure flushing spray gun 1 51 , the high-pressure flushing spray gun 2 52 and the high-pressure flushing spray gun 3 53 are all provided with a high-pressure flushing nozzle 54 .

[0029] The opening and closing of the high-pressure flushing unit 5, the demisting mechanism 2 3 and the nozzle on the demisting mechanism 1 2 are controlled by the temperature sensor 6.

[0030] The water collecting ring 8 is an inverted cone cylinder structure, and the angle between the inverted cone cylinder and the inner wall of the granulating tower body 1 is between 10-45 degrees. The size of the water collecting ring 8 increases from top to bottom.

[0031] A pressure sensor 7 is provided below the baffle 4; the baffle 4 is disc-shaped and installed in the granulating tower body 1. The baffle 4 is composed of a plurality of zigzag metal plates 41, and the gaps 42 between the metal plates allow blast furnace flue gas to pass through.

[0032] The outer sides of the granulating tower body 1 corresponding to the demisting mechanism 1 2 , the demisting mechanism 2 3 and the high-pressure flushing unit 5 are all provided with platforms 11 .

[0033] The granulation tower body 1 is cylindrical or conical, and the upper portion of the granulation tower body 1 has only one opening.

[0034] In the examples:

[0035] As attached Figure 1 As shown, a blast furnace slag flue gas spray dehumidification device includes a granulation tower body 1 having a conical tower body and installed in a sub-area of ​​a granulation tower. The upper portion of the granulation tower body 1 has only a single open opening. A demisting mechanism 2 is provided within the granulation tower body 1.

[0036] As attached Figure 3 As shown, the demisting mechanism 2 includes an annular water supply pipe 25, which is located outside the granulation tower body 1. A demisting spray gun 21 is connected to the annular water supply pipe 25. The demisting spray gun 21 penetrates deep into the interior of the granulation tower body 1 and is evenly distributed along the center of the granulation tower body 1. There is one demisting spray gun 21.

[0037] As attached Figure 3 As shown, the demisting mechanism 2 also includes a demisting spray gun 22. The length of the demisting spray gun 22 is smaller than the demisting spray gun 1 21. The demisting spray gun 22 penetrates into the interior of the granulation tower body 1 and is evenly distributed along the center of the granulation tower body 1. There are three of them.

[0038] As attached Figure 3 As shown, the demisting mechanism 1 also includes a demisting lance 3 23. The length of the demisting lance 3 23 is shorter than the demisting lance 22. The demisting lance 3 23 extends deep into the interior of the granulation tower body 1. There are six demisting lances 23. The demisting lance 1 21, the demisting lance 22, and the demisting lance 3 23 are each equipped with a plurality of demisting nozzles 24.

[0039] As attached Figure 1As shown, a demisting mechanism 2 3 is provided above the demisting mechanism 1 2 at a certain distance. The demisting mechanism 2 3 has a similar structure to the demisting mechanism 1 2 , and the only difference is that the diameters of the areas where the granulation tower bodies 1 are located are different.

[0040] As attached Figure 1 and attached Figure 5 As shown, a baffle 4 is installed above the demisting mechanism 2 (3). The baffle 4 is disc-shaped and installed in the granulation tower body 1. The baffle 4 is composed of zigzag metal plates 41. The gaps 42 between the metal plates 41 allow the blast furnace flue gas to pass through. When the blast furnace flue gas encounters the baffle 4, it cools and condenses, and then flows down the granulation tower body 1.

[0041] As attached Figure 1 As shown, a high-pressure flushing unit 5 is provided above the baffle 4 at a predetermined distance. The high-pressure flushing unit 5 includes a second annular water supply pipe 55 located outside the granulating tower body 1. A high-pressure flushing spray gun 51 is connected to the second annular water supply pipe 55. The high-pressure flushing spray gun 51 penetrates deep into the interior of the granulating tower body 1 and is evenly distributed along the center of the granulating tower body 1. There is one high-pressure flushing spray gun 51.

[0042] As attached Figure 6 As shown, the high-pressure flushing unit 5 also includes a second high-pressure flushing spray gun 52. The length of the second high-pressure flushing spray gun 52 is smaller than that of the first high-pressure flushing spray gun 51. The second high-pressure flushing spray gun 52 penetrates into the interior of the granulation tower body 1 and is evenly distributed along the center of the granulation tower body 1. There are three of them.

[0043] As attached Figure 6 As shown, the high-pressure flushing unit 5 also includes a third high-pressure flushing lance 53. The third high-pressure flushing lance 53 is shorter than the second high-pressure flushing lance 52 and penetrates deep into the interior of the granulating tower body 1. There are six third high-pressure flushing lances 53. Each of the first high-pressure flushing lance 51, the second high-pressure flushing lance 52, and the third high-pressure flushing lance 53 is equipped with a plurality of high-pressure flushing nozzles 54.

[0044] As attached Figure 1 and attached Figure 2 As shown, the demisting mechanism 1 2, the demisting mechanism 2 3, and the high-pressure flushing unit 5 are staggered with each other during installation, and spray guns of different lengths act on different areas respectively.

[0045] As attached Figure 1As shown, a temperature sensor 6 is installed below each of the demisting mechanism 1 2, the demisting mechanism 2 3, and the high-pressure flushing unit 5 to detect the internal temperature of the granulation tower body 1 at different levels. The temperature sensor 6 is interlocked with the automatic control system to control the opening and closing of the demisting nozzles 24 and the high-pressure flushing nozzles 54 on the demisting mechanism 1 2, the demisting mechanism 2 3, and the high-pressure flushing unit 5. When the steam volume increases, the temperature inside the granulation tower body 1 continues to rise, and the temperature sensor 6 interlocks to control the opening of all the demisting nozzles 24 and the high-pressure flushing nozzles 54. When the steam volume decreases, the temperature inside the granulation tower body 1 decreases, and the temperature sensor 6 interlocks to control the closing of some of the demisting nozzles 24 and the high-pressure flushing nozzles 54.

[0046] As attached Figure 1 As shown, a pressure sensor 7 is provided below the baffle 4. When the internal bent metal plates of the baffle 4 are used, some blast furnace slag particles and slag wool will adhere to each other, forming a blockage over time. When the baffle 4 is blocked, the gas at this level continues to accumulate, and the pressure increases. At this time, the pressure sensor alarms and maintenance is carried out to prevent accidents.

[0047] As attached Figure 1 As shown, the granulation tower body 1 is further provided with a water collecting ring 8. There are three water collecting rings 8, which are respectively located below the demisting mechanism 1 2, the demisting mechanism 2 3, and the high-pressure flushing unit 5. The sizes of the water collecting rings 8 increase from top to bottom. The angle between the water collecting ring 8 and the inner wall of the granulation tower body 1 is between 10 and 45 degrees. When the blast furnace flue gas encounters the inner wall of the granulation tower body 1, or during the condensation process, it will flow down along the inner wall of the granulation tower body 1. Since the blast furnace flue gas contains a certain amount of sulfide, which is corrosive, long-term flow along the inner wall will corrode the granulation tower body 1 itself. When the blast furnace flue gas water condenses, it can flow down along the water collecting ring 8 and directly fall into the bottom of the granulation tower body 1, preventing it from flowing down along the inner wall of the granulation tower body 1 and corroding the tower body itself.

[0048] As attached Figure 1 As shown, the outsides of the demisting mechanism 1 2 , the demisting mechanism 2 3 , and the high-pressure flushing unit 5 are all provided with platforms 11 , which can be used by maintenance personnel to observe, inspect, and perform maintenance operations when production is stopped.

[0049] The working principle of this utility model:

[0050] As the blast furnace slag chute flows into the granulation tower, pressurized water from the blasting box crushes the slag into small particles. This process generates a large amount of water-containing flue gas, which continuously rises within the granulation tower. This water-containing gas is fully contacted by the cooling atomized water droplets sprayed by demister mechanism one, cooling and washing the water-containing flue gas. The atomized water droplets intercept the blast furnace slag particles and slag wool contained in the flue gas, effectively removing dust from the flue gas. At this point, demister mechanism two performs a second cleaning, further cleaning the blast furnace slag particles and slag wool from the flue gas, and also collects water and removes water mist.

[0051] After two treatments, the blast furnace flue gas is cooled again by the baffles. When it encounters the baffles, it condenses into large water droplets and converges into a water flow, which is then collected by water collection rings at different levels to prevent it from flowing down the inner wall of the granulation tower body and corroding the tower body itself. After being washed by the demisting mechanism 1 and the demisting mechanism 2, the blast furnace flue gas mist continues to enter the area where the high-pressure flushing unit is located. The high-pressure flushing unit can clean the baffles to prevent them from clogging, and the flushing unit can further clean the flue gas. Due to long-term use, some blast furnace slag particles and slag wool will inevitably adhere to the baffles, forming a blocked state over time. At this time, the gas at this level continues to accumulate, and the pressure increases. At this time, the pressure sensor alarms and is repaired to prevent accidents.

[0052] When the steam volume increases, the temperature inside the granulation tower body continues to rise. The temperature sensors located below the high-pressure flushing unit, demisting mechanism 2, and demisting mechanism 1 control the opening of all demisting nozzles and high-pressure flushing nozzles, improving the cleaning and whitening effect. When the steam volume decreases, the temperature inside the granulation tower body drops. At this time, the temperature sensors control the closing of some demisting nozzles and high-pressure flushing nozzles, which is more energy-efficient.

Claims

1. A blast furnace slag flue gas spray dehumidification device, characterized by: The invention comprises a granulation tower body (1), wherein a demisting mechanism (2) is provided inside the granulation tower body (1), a demisting mechanism (3) is provided above the demisting mechanism (2), a baffle (4) is provided above the demisting mechanism (3), a high-pressure flushing unit (5) is provided above the baffle (4), and respective temperature sensors (6) are matched below the high-pressure flushing unit (5), the demisting mechanism (3) and the demisting mechanism (2), and a water collecting ring (8) is provided below the temperature sensor (6) of the demisting mechanism (2), the demisting mechanism (3) and the high-pressure flushing unit (5) in the granulation tower body (1).

2. The blast furnace slag flue gas spray dehumidification device according to claim 1, characterized in that: The demisting mechanism 1 (2) comprises an annular water supply pipe 1 (25), a demisting spray gun 1 (21), a demisting spray gun 2 (22) and a demisting spray gun 3 (23). The annular water supply pipe 1 (25) is arranged around the outer circumference of the granulating tower body (1). The demisting spray gun 1 (21), the demisting spray gun 2 (22) and the demisting spray gun 3 (23) are respectively connected to the annular water supply pipe 1 (25) and horizontally enter the granulating tower body (1). The demisting spray gun 1 (21) is the longest and penetrates into the center of the granulating tower body (1). The length of the demisting spray gun 2 (22) is shorter than that of the demisting spray gun 1 (21). The length of the demisting spray gun 3 (23) is shorter than that of the demisting spray gun 2 (22). The demisting mechanism 1 (2) and the demisting mechanism 2 (3) have the same structure. The high-pressure flushing unit (5) comprises an annular water supply pipe 2 (55), a high-pressure flushing spray gun 1 (51), a high-pressure flushing spray gun 2 (52) and a high-pressure flushing spray gun 3 (53). The annular water supply pipe 2 (55) is arranged around the outer circumference of the granulating tower body (1). The high-pressure flushing spray gun 1 (51), the high-pressure flushing spray gun 2 (52) and the high-pressure flushing spray gun 3 (53) are respectively connected to the annular water supply pipe 2 (55) and horizontally enter the granulating tower body (1). The high-pressure flushing spray gun 1 (51) is the longest and penetrates into the center of the granulating tower body (1). The length of the high-pressure flushing spray gun 2 (52) is shorter than the length of the high-pressure flushing spray gun 1 (51), and the length of the high-pressure flushing spray gun 3 (53) is shorter than the length of the high-pressure flushing spray gun 2 (52).

3. The blast furnace slag flue gas spray dehumidification device according to claim 2, characterized in that: The number of the demisting spray gun one (21), the demisting spray gun two (22) and the demisting spray gun three (23) is more than one, and the ends of the demisting spray gun one (21), the demisting spray gun two (22) and the demisting spray gun three (23) are all provided with demisting nozzles (24).

4. The blast furnace slag flue gas spray dehumidification device according to claim 2, characterized in that: The number of the high-pressure flushing spray gun one (51), the high-pressure flushing spray gun two (52) and the high-pressure flushing spray gun three (53) is more than one, and the ends of the high-pressure flushing spray gun one (51), the high-pressure flushing spray gun two (52) and the high-pressure flushing spray gun three (53) are all provided with high-pressure flushing nozzles (54).

5. The blast furnace slag flue gas spray dehumidification device according to claim 1 or 2, characterized in that: The water collecting ring (8) is an inverted cone cylinder structure, and the angle between the inverted cone cylinder and the inner wall of the granulating tower body (1) is between 10 and 45 degrees.

6. The blast furnace slag flue gas spray dehumidification device according to claim 1 or 2, characterized in that: A pressure sensor (7) is provided below the baffle (4); the baffle (4) is disc-shaped and is installed in the granulating tower body (1); the baffle (4) is composed of a plurality of zigzag metal plates (41), and the gaps (42) between the metal plates are capable of allowing blast furnace flue gas to pass through.

7. The blast furnace slag flue gas spray dehumidification device according to claim 1 or 2, characterized in that: The outer sides of the granulation tower body (1) corresponding to the demisting mechanism 1 (2), the demisting mechanism 2 (3) and the high-pressure flushing unit (5) are all provided with platforms (11).

8. The blast furnace slag flue gas spray dehumidification device according to claim 1 or 2, characterized in that: The granulation tower body (1) is cylindrical or conical, and the upper part of the granulation tower body (1) has only one opening.

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