A high-efficiency purification device for blast furnace ironmaking fumes

Abstract

The present application relates to the technical field of industrial dust removal, in particular to a high-efficiency blast furnace ironmaking smoke dust purification device, comprising a bearing frame, a dust collector is fixedly installed on the bearing frame, the dust collector is located directly above the blast furnace, the upper end of the dust collector is communicated with a dust removal tower through a pipeline, a spraying mechanism for adsorbing dust by water mist is arranged on the dust collector, the present application sprays atomized water to the inner side surface of the outer shell through a plurality of spraying pipes to form a water curtain net to directly capture dust, not only realizing efficient wetting and capturing of dust, but also actively pushing and guiding dust to flow to the inside of the dust collector by the impact force of water mist spraying, effectively making up the defect that water mist dust suppression and airflow dust suction are disconnected in the traditional way; at the same time, targeted partition dust suction is carried out through flow basin I and flow basin II, significantly optimizing the spatial distribution of the negative pressure field, greatly inhibiting the phenomenon of dust escaping from the edge of the dust suction port, and ensuring the high efficiency and high quality of the overall dust removal operation.

Description

Technical Field

[0001] This invention relates to the field of industrial dust removal technology, specifically a high-efficiency purification device for blast furnace ironmaking dust. Background Technology

[0002] During the blast furnace ironmaking process, the high-temperature reaction inside the furnace continuously generates a large amount of dust. If this dust is discharged directly into the workshop or atmospheric environment without effective treatment, it will seriously pollute the air quality of the work area and endanger the health of operators. Therefore, setting up an efficient and reliable dust removal system is an important part of steel companies to achieve green production and clean operation.

[0003] Currently, the common technical solution for controlling blast furnace dust is a dual dust removal design that combines a pneumatic dust collector with a pneumatic atomizing water dust collector. The pneumatic atomizing water dust collector atomizes water into fine droplets and sprays them into the dust-generating area, allowing the dispersed dust particles to fully collide and combine with the atomized water, thereby capturing the dust. At the same time, the pneumatic dust collector uses the negative pressure generated by the fan to draw the airflow of dust that has been initially condensed by the water mist or has not yet been captured into the pipeline and transport it to the subsequent dust removal equipment for deep separation and treatment.

[0004] However, existing wind-powered dust removal devices and pneumatic atomizing water dust removal devices are relatively separated in their layout. The water mist spraying area is large, making it difficult to actively guide dust to the suction port. On the other hand, negative pressure dust collection passively relies on airflow organization, which has limited efficiency in capturing dust that has already diffused or has uneven concentration distribution. The two cannot form an efficient mutual assistance and dynamic supplement in terms of space and power.

[0005] Secondly, common wind-powered dust removal devices often use a single suction pipe or gas collection hood aimed at the center of the blast furnace dust source, resulting in a single negative pressure distribution. This leads to excessive suction force for high-concentration dust, while insufficient coverage of low-concentration dust on the periphery. This makes it very easy for high-speed rising dust to escape from the edge of the suction port, affecting the overall dust removal efficiency and quality. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high-efficiency purification device for blast furnace ironmaking dust, including a support frame, on which a dust collector is fixedly installed. The dust collector is located directly above the blast furnace, and the upper end of the dust collector is connected to the dust removal tower through a pipe. The dust collector is equipped with a spray mechanism that is conducive to adsorbing dust with water mist.

[0007] The vacuum cleaner includes an outer shell fixedly connected to a support frame, and an inner cylinder fixedly connected inside the outer shell. The annular area between the inner cylinder and the outer shell is called flow zone one, and the area inside the inner cylinder is called flow zone two. When vacuuming, the suction volume of flow zone two is greater than that of flow zone one, thereby performing zoned vacuuming.

[0008] The spray mechanism includes several spray pipes arranged through a water delivery assembly. The spray pipes are arranged circumferentially along the outer shell, and several atomizing nozzles on the spray pipes are all oriented towards the axial direction of the outer shell. During dust collection, the several spray pipes spray atomized water obliquely upward onto the inner side of the outer shell and form a water curtain to capture dust.

[0009] The impact force of the atomized water sprayed by the spray pipe actively propels and guides the dust into the inner side of the outer shell. The second flow basin quickly absorbs the high-concentration dust in the center of the blast furnace, while the first flow basin supplements the absorption of the low-concentration dust around the periphery of the blast furnace.

[0010] The system utilizes a combination of atomized water to actively guide dust, a water curtain net to capture dust, and zoned vacuuming to achieve high-quality and high-efficiency dust removal operations.

[0011] Preferably, the inner cylinder and the outer shell are coaxial and nested, and both the inner cylinder and the outer shell have a structure with a cylindrical upper part and a conical lower part.

[0012] Preferably, on the same horizontal cross-section, the cross-sectional area of ​​the second watershed is larger than that of the first watershed.

[0013] Preferably, the water delivery assembly includes an annular water pipe fixedly installed on the outer side of the housing. The annular water pipe is connected to a water pump through a pipeline, and the lower side of the annular water pipe is connected to a spray pipe through an electric flow valve.

[0014] Preferably, a number of concentration sensors are fixedly installed at equal intervals along the circumference of the lower side of the outer casing. The dust concentration data fed back to the host computer through the concentration sensors allows the host computer to adjust the flow rate of the spray pipe in real time by controlling the electric flow valve.

[0015] Preferably, the number of concentration sensors is equal to the number of spray tubes, and the concentration sensors and spray tubes are arranged alternately.

[0016] Preferably, a heat insulation cover is fixedly installed on the outside of the spray pipe, and the heat insulation cover is placed on the outside of the electric flow valve.

[0017] Preferably, the spray pipes are provided in an odd number, such that the spray pipes face the area between two adjacent spray pipes on opposite sides, to avoid the water mist sprayed from the two opposite spray pipes canceling each other out.

[0018] Preferably, a reflective ring is fixedly installed on the lower part of the inner side of the outer shell. The water mist sprayed from the spray pipe impacts the inner side of the reflective ring, and then the water mist is guided upward by the reflective ring into the interior of the outer shell.

[0019] Preferably, a few turbulence rings are fixedly installed on the upper side of the inner surface of the outer shell along the vertical direction. During dust removal, the lower side of the turbulence ring is the windward side and the upper side is the leeward side.

[0020] The beneficial effects of this invention are as follows: First, this invention uses several spray pipes arranged around the perimeter of the outer shell to spray atomized water onto the inner surface of the outer shell to form a water curtain net to directly capture dust. This not only achieves efficient wetting and collection of dust, but also utilizes the impact force of the water mist spray to actively push and guide the dust flow into the vacuum cleaner, effectively making up for the defect of water mist dust suppression and airflow dust suction in traditional methods. At the same time, targeted zoned dust suction through flow zone one and flow zone two significantly optimizes the spatial distribution of the negative pressure field, greatly suppressing the phenomenon of dust escaping from the edge of the suction port, ensuring high efficiency and high quality of the overall dust removal operation.

[0021] Second, this invention adopts an odd number of spray pipes in its layout, which effectively avoids the water mist sprayed from two opposite spray pipes from impacting and canceling each other out. The concentration sensor set on the lower side of the outer shell monitors the dust concentration in real time and feeds the data back to the host computer. The host computer controls the corresponding electric flow valve to dynamically adjust the spray flow of each spray pipe, so that the spray can adapt to the fluctuation of the rising direction of blast furnace dust, accurately push the dust and guide it to the stronger suction area, ensuring a stable dust collection effect under different working conditions.

[0022] Third, the present invention adopts a structural design in which the cross-sectional area of ​​the second flow zone is larger than that of the first flow zone on the same horizontal cross section, so that the air intake of the second flow zone is greater than that of the first flow zone, forming a zoned dust collection with strong inner and weak outer sections. This is coordinated with the function of the spray pipe to actively push and guide the dust, so that the high-concentration dust located in the center of the blast furnace dust source can be quickly and concentratedly absorbed by the second flow zone, while the low-concentration diffuse dust located in the periphery can be effectively supplemented and absorbed by the first flow zone, thus realizing intelligent zoned management of dust concentration gradient.

[0023] Fourth, the present invention uses a reflective ring to guide most of the water mist sprayed from the spray pipe upward into the internal space of the outer shell, which enhances the rapid absorption of low-concentration dust in the watershed; at the same time, when the dust removal airflow passes through the turbulence ring, the vortex negative pressure generated on its leeward side disturbs the water mist and dust entrained in the dust removal airflow, which greatly increases the chance of collision and contact between water mist and dust particles, thereby further improving the overall purification efficiency. Attached Figure Description

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

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a front view of the outer shell, annular water pipe, concentration sensor, and spray pipe in this invention;

[0027] Figure 3 This is a schematic diagram of the structure of the outer shell, inner cylinder, reflective ring, and turbulence ring in this invention;

[0028] Figure 4 This is a partial cross-sectional view of the annular water pipe, electric flow valve, spray pipe and heat insulation cover in this invention;

[0029] Figure 5 This is a schematic diagram of the electric flow valve and spray pipe in this invention;

[0030] Figure 6 This is a partial cross-sectional view of the outer shell, inner cylinder, reflective ring, and turbulence ring in this invention.

[0031] In the diagram: 1. Support frame; 2. Vacuum cleaner; 3. Spray mechanism; 21. Outer shell; 22. Inner cylinder; 23. Flow area one; 24. Flow area two; 31. Water delivery assembly; 32. Spray pipe; 211. Concentration sensor; 212. Reflective ring; 213. Baffle ring; 311. Annular water pipe; 312. Electric flow valve; 321. Heat insulation cover. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0033] See Figure 1 and Figure 2 A high-efficiency purification device for blast furnace ironmaking dust includes a support frame 1, on which a dust collector 2 is fixedly installed. The dust collector 2 is located directly above the blast furnace. The upper end of the dust collector 2 is connected to a dust removal tower through a pipe. The dust collector 2 is equipped with a spray mechanism 3 that uses water mist to adsorb dust.

[0034] During dust removal, the suction power of the dust removal tower is used to draw air from inside the dust collector 2, creating a negative pressure zone inside the dust collector 2. The air pressure difference between this negative pressure zone and the outside creates an airflow, which carries dust into the dust collector 2, thereby absorbing the dust at the blast furnace mouth. Finally, the dust is filtered and settled inside the dust removal tower, thus purifying the blast furnace ironmaking dust.

[0035] It should be noted that the dust collection tower adopts the existing technology of wet dust collection tower.

[0036] See Figure 1 , Figure 3 and Figure 6The vacuum cleaner 2 includes an outer shell 21 fixedly connected to the support frame 1, and an inner cylinder 22 fixedly connected inside the outer shell 21. The annular area between the inner cylinder 22 and the outer shell 21 is called flow zone 1 23, and the area inside the inner cylinder 22 is called flow zone 24. When vacuuming, the suction volume of flow zone 24 is greater than that of flow zone 1 23, thereby performing zoned vacuuming.

[0037] When the dust removal tower starts, it directly draws air from inside the outer shell 21. Since the outer shell 21 is connected to the upper part of the inner cylinder 22, the dust removal tower draws air from both the first flow zone 23 and the second flow zone 24 at the same time, so that the first flow zone 23 and the second flow zone 24 can perform zoned air intake at the same time.

[0038] See Figure 1 , Figure 2 and Figure 3 The spray mechanism 3 includes several spray pipes 32 arranged through a water delivery assembly 31. The spray pipes 32 are arranged circumferentially along the outer shell 21. Several atomizing nozzles on the spray pipes 32 are all oriented towards the axial direction of the outer shell 21. During dust collection, the several spray pipes 32 spray atomized water obliquely upward onto the inner side of the outer shell 21 and form a water curtain to capture dust. The spray direction of the atomizing nozzles is directed towards the axial direction of the outer shell 21 in the horizontal plane and is inclined upward at an acute angle in the vertical plane, so that the water mist sprayed by the atomizing nozzles forms a water curtain inside the outer shell 21.

[0039] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The water delivery assembly 31 includes an annular water pipe 311 fixedly installed on the outside of the housing 21. The annular water pipe 311 is connected to the water pump through a pipeline. The lower side of the annular water pipe 311 is connected to the spray pipe 32 through an electric flow valve 312.

[0040] During dust removal, clean water is pumped into the annular water pipe 311 by a water pump. Then, the clean water is rapidly flowed into each spray pipe 32 by the control of the electric flow valve 312. The clean water is then atomized by the atomizing nozzle of the spray pipe 32 and sprayed obliquely upward. At the same time, the water mist is sprayed in the axial direction of the outer shell 21. The water mist sprayed from several spray pipes 32 combines to form a water curtain net, thereby directly capturing the large amount of dust generated at the blast furnace mouth with a high coverage rate through the large area of ​​the water curtain net.

[0041] Meanwhile, since the water mist is sprayed obliquely upwards towards the axis of the outer shell 21, the impact force of the water mist spraying can not only push the dust closer to the location of the second flow zone 24 with a larger air volume, so that the high-concentration dust located at the center of the blast furnace dust source can be quickly and concentratedly absorbed by the second flow zone 24; it can also push the low-concentration dust that has not been absorbed by the second flow zone 24 to the inner side of the outer shell 21, so that the low-concentration diffused dust on the periphery can be effectively supplemented and absorbed by the first flow zone 23; it effectively makes up for the defect of the disconnect between water mist dust suppression and airflow dust suction in the traditional method, and realizes intelligent zonal management of dust concentration gradient.

[0042] It should be noted that the electric flow valve 312 adjusts the water mist flow rate of the spray pipe 32 so that when the water mist impact force pushes the dust to the position of the second flow area 24, the water mist impact force is basically completely consumed. At this time, the high-concentration dust is quickly absorbed by the second flow area 24 because it loses its kinetic energy. The low-concentration dust located on the periphery, due to its small mass, is pushed obliquely upward to the inner side of the outer shell 21 by the remaining impact force of the water mist, so that the low-concentration dust is supplemented and absorbed by the first flow area 23.

[0043] To achieve a zoned dust collection effect where the air volume of flow area 24 is greater than that of flow area 23, the present invention designs the following structure; see reference. Figure 2 , Figure 3 and Figure 6 The inner cylinder 22 and the outer shell 21 are coaxial and nested. Both the inner cylinder 22 and the outer shell 21 have a cylindrical upper part and a conical lower part. On the same horizontal section, the cross-sectional area of ​​the second flow region 24 is larger than that of the first flow region 23. It should be noted that the first flow region 23 and the second flow region 24 do not refer to the cross-sectional area of ​​the outer shell 21 and the inner cylinder 22, respectively. The first flow region 23 refers to the area of ​​the annular region formed between the outer shell 21 and the inner cylinder 22, while the second flow region 24 refers to the area of ​​the channel inside the outer shell 21. See Appendix. Figure 6 It can be seen that the area of ​​the inner channel of the outer shell 21 is obviously larger than the area of ​​the annular region formed between the outer shell 21 and the inner cylinder 22. Therefore, the cross-sectional area of ​​the second flow domain 24 is larger than the cross-sectional area of ​​the first flow domain 23.

[0044] When the dust collector tower simultaneously draws air from both flow zone 24 and flow zone 23, the upper and lower pressures of flow zone 24 and flow zone 23 are the same. Under the same pressure difference, the flow rate of the channel depends on its flow resistance. The flow resistance decreases as the cross-sectional area increases. Therefore, the air volume of flow zone 24 is greater than that of flow zone 23. In addition, in this invention, the upper cylinder and lower cover structure of the inner cylinder 22 and the outer shell 21 form a Venturi tube effect during air suction, which increases the airflow velocity and thus enhances the dust absorption effect.

[0045] In complex operating conditions, dust particles often fluctuate as they rise, preventing them from rising vertically. To ensure that the larger suction volume of the flow area 24 accurately handles the absorption of high-concentration dust under these conditions, this invention designs the following structure: (See attached diagram) Figure 2 and Figure 3 A number of concentration sensors 211 are fixedly installed at equal intervals along the circumference of the lower side of the outer casing 21. The number of concentration sensors 211 is equal to that of the spray pipe 32, and the concentration sensors 211 and the spray pipe 32 are arranged alternately.

[0046] During vacuuming, the concentration sensor 211 located on the lower side of the outer casing 21 monitors the dust concentration in real time and feeds the data back to the host computer. The host computer dynamically adjusts the flow rate of the spray pipe 32 in real time by controlling the electric flow valve 312 based on the dust concentration data. This, in turn, adjusts the impact force of the water mist sprayed by each spray pipe 32 in real time. For example, when the dust concentration reported by the concentration sensor 211 on the east side increases, the electric flow valve 312 on the east side controls the spray pipe 32 on the east side to increase the spray flow rate, thereby increasing the impact force of the spray pipe 32 on the dust. This helps to push the dust westward to the location of the second watershed 24, ensuring the efficient absorption of high-concentration dust in the second watershed 24.

[0047] By staggering the concentration sensor 211 and the spray pipe 32, water mist can be prevented from spraying onto the concentration sensor 211 and affecting the accuracy of the data fed back by the concentration sensor 211.

[0048] It should be noted that the concentration sensor 211 is made of high-temperature resistant material, and its internal electronic components are heat-insulated, enabling it to withstand high-temperature dust.

[0049] To ensure the water mist spraying function of this invention can operate stably and continuously in high-temperature environments, the invention is designed with the following structure: (See attached diagram) Figure 2 , Figure 3 , Figure 4 and Figure 5 A heat insulation cover 321 is fixedly installed on the outside of the spray pipe 32. The heat insulation cover 321 covers the outside of the electric flow valve 312. The heat insulation cover 321 blocks most of the heat from being transferred to the electric flow valve 312. The electric flow valve 312 consists of a valve body connected to the spray pipe 32 and a motor that controls the valve body. The motor adopts an explosion-proof structure and can adapt to the high-temperature environment of blast furnace ironmaking.

[0050] To prevent the two opposing spray pipes 32 from spraying against each other, thus limiting the spray impact force to the location of the second watershed 24, the present invention designs the following structure: (See attached diagram) Figure 1 , Figure 2 and Figure 3The spray pipes 32 are provided with an odd number of spray pipes, so that the spray pipes 32 are oriented towards the area between two adjacent spray pipes 32 on opposite sides, so as to avoid the water mist sprayed by the two opposite spray pipes 32 canceling each other out. In this way, the residual impact force of the water mist sprayed by the spray pipes 32 after passing through the second flow area 24 can push the low-concentration dust on the periphery to the inner side of the outer shell 21, so that the low-concentration dust can be supplemented and absorbed by the first flow area 23.

[0051] Because the amount of water mist sprayed to location 23 in the watershed is relatively small and the impact force is low, in order to more efficiently capture low-concentration dust with the limited water mist, the present invention designs the following structure: (See reference) Figure 3 and Figure 6 A reflective ring 212 is fixedly installed on the lower part of the inner side of the outer shell 21. The water mist sprayed from the spray pipe 32 pushes the low-concentration dust from the periphery to impact the inner side of the reflective ring 212 at an angle. Then, the water mist is guided upward by the reflective ring 212 to the inside of the outer shell 21, which helps to enhance the rapid absorption of low-concentration dust by the flow area 23. A small disturbance flow ring 213 is fixedly installed on the inner side of the outer shell 21 in the vertical direction. During dust removal, the lower side of the disturbance flow ring 213 is the windward side and the upper side is the leeward side. Then, when the dust removal airflow passes upward through the disturbance flow ring 213, the vortex negative pressure generated by the leeward side of the disturbance flow ring 213 disturbs the water mist and dust entrained in the dust removal airflow, which greatly increases the collision and contact opportunities between water mist and dust particles, thereby further improving the overall purification efficiency.

[0052] Although this invention adds structures such as an inner cylinder 22, an outer shell 21, a concentration sensor 211, a reflective ring 212, and a turbulence ring 213 to traditional wind-powered dust removal devices and pneumatic atomized water dust removal devices, slightly increasing equipment costs, the combination of the water curtain net formed by the spray pipe 32 and the zoned dust collection of the vacuum cleaner 2 effectively compensates for the defect of the disconnect between water mist dust suppression and airflow dust collection in traditional methods. It achieves active guidance and capture of dust by the water curtain net; rapid and concentrated absorption of high-concentration dust by the second flow area 24; and effective supplementary absorption of low-concentration dust in the periphery by the first flow area 23 after being guided by the reflective ring 212 and disturbed by the turbulence ring 213. Thus, a high-quality and high-efficiency dust removal operation system is formed by the synergy of active dust guidance by atomized water, dust capture by the water curtain net, and zoned dust collection.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0054] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency purification device for blast furnace ironmaking dust, comprising a support frame, characterized in that, A dust collector is fixedly installed on the support frame. The dust collector is located directly above the blast furnace. The upper end of the dust collector is connected to the dust removal tower through a pipe. The dust collector is equipped with a spray mechanism that uses water mist to adsorb dust. The vacuum cleaner includes an outer shell fixedly connected to a support frame, and an inner cylinder fixedly connected to the inside of the outer shell. The annular area between the inner cylinder and the outer shell is called flow zone one, and the area inside the inner cylinder is called flow zone two. When vacuuming, the suction volume of flow zone two is greater than that of flow zone one, thereby performing zoned vacuuming. The spray mechanism includes several spray pipes arranged through a water delivery assembly. The spray pipes are arranged circumferentially along the outer shell. Several atomizing nozzles on the spray pipes are all facing the axial direction of the outer shell. When vacuuming, the several spray pipes spray atomized water obliquely upward onto the inner side of the outer shell and form a water curtain to capture dust. The impact force of the atomized water sprayed by the spray pipe actively pushes and guides the dust into the inner side of the outer shell. The second flow basin quickly absorbs the high-concentration dust in the center of the blast furnace, while the first flow basin supplements the absorption of the low-concentration dust around the blast furnace. The dust removal operation is carried out by actively guiding dust with atomized water, capturing dust with a water curtain net, and performing zoned dust collection in a coordinated manner.

2. The high-efficiency purification device for blast furnace ironmaking dust according to claim 1, characterized in that, The inner cylinder and the outer shell are coaxial and nested, and both the inner cylinder and the outer shell have a cylindrical upper part and a conical lower part.

3. The high-efficiency purification device for blast furnace ironmaking dust according to claim 2, characterized in that, On the same horizontal cross section, the cross-sectional area of ​​the second watershed is larger than that of the first watershed.

4. The high-efficiency purification device for blast furnace ironmaking dust according to claim 1, characterized in that, The water delivery assembly includes an annular water pipe fixedly installed on the outside of the housing. The annular water pipe is connected to a water pump through a pipeline, and the lower side of the annular water pipe is connected to a spray pipe through an electric flow valve.

5. The high-efficiency purification device for blast furnace ironmaking dust according to claim 4, characterized in that, Several concentration sensors are fixedly installed at equal intervals along the circumference of the lower side of the outer casing. The dust concentration data fed back to the host computer through the concentration sensors allows the host computer to adjust the flow rate of the spray pipe in real time by controlling the electric flow valve.

6. The high-efficiency purification device for blast furnace ironmaking dust according to claim 5, characterized in that, The number of concentration sensors is equal to the number of spray tubes, and the concentration sensors and spray tubes are arranged alternately.

7. The high-efficiency purification device for blast furnace ironmaking dust according to claim 4, characterized in that, A heat insulation cover is fixedly installed on the outside of the spray pipe, and the heat insulation cover is placed on the outside of the electric flow valve.

8. The high-efficiency purification device for blast furnace ironmaking dust according to claim 1, characterized in that, The spray pipes are provided in an odd number, so that the spray pipes face the area between two adjacent spray pipes on opposite sides, so as to avoid the water mist sprayed from the two opposite spray pipes canceling each other out.

9. The high-efficiency purification device for blast furnace ironmaking dust according to claim 1, characterized in that, A reflective ring is fixedly installed on the lower part of the inner side of the outer shell. The water mist sprayed from the spray pipe hits the inner side of the reflective ring, and then the water mist is guided upward by the reflective ring into the interior of the outer shell.

10. The high-efficiency purification device for blast furnace ironmaking dust according to claim 1, characterized in that, Several turbulence rings are fixedly installed on the upper side of the inner surface of the outer shell along the vertical direction. During dust removal, the lower side of the turbulence ring is the windward side and the upper side is the leeward side.

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