Air curtain type closed cover dust removal assembly and smelting steel production system

Abstract

The utility model discloses an air curtain type closed hood dust removal assembly and a smelting steel production system, the air curtain type closed hood dust removal assembly comprises a hood body assembly, at least one air curtain machine, a dust remover, a main fan and a main air pipe, the hood body assembly comprises a plurality of gas collecting hoods and at least two opposite channel structures, and the channel structures are arranged between the at least two gas collecting hoods. A gas collecting hood is arranged between every two adjacent channel structures, the channel structures are connected with the gas collecting hoods adjacent to the channel structures, the gas collecting hoods are connected with the gas collecting hoods adjacent to the channel structures or the channel structures, steel wire ropes and lifting hooks of a crane are installed in the channel structures, and an air curtain machine is connected with the gas collecting hoods or the tapping channel structures. The air curtain machine is used for forming an air curtain for locking air for the tapping channel structure, the dust remover comprises an inlet, an outlet and a dust removal air duct formed between the inlet and the outlet, a plurality of filter drums are mounted in the dust removal air duct, the main fan is mounted at the outlet of the dust remover, and the main air pipe is communicated between the air outlets of the plurality of gas-collecting hoods and the inlet of the dust remover. Closed tapping can be realized through the tapping device.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal, in particular to an air curtain type closed cover dust removal component and a smelting steel production system. Background Art

[0002] During the smelting and steelmaking process, due to the restriction of the overhead crane lifting the ladle, it is impossible to achieve fully closed production. The smoke during the smelting process diffuses inside the factory building and cannot be effectively collected, which has a negative impact on dust pollution control, the production environment and the health of employees. On-site operations are also greatly restricted and urgently need to be improved. Utility Model Content

[0003] In order to solve the above problems, the present application provides an air curtain type closed hood dust removal component and a smelting steel production system.

[0004] The present application provides an air curtain type closed hood dust removal assembly, including a hood body assembly, at least one air curtain machine, a dust collector, a main fan and a main air duct, the hood body assembly includes a plurality of air collecting hoods and at least two relative channel structures, the channel structure is arranged between at least two air collecting hoods, an air collecting hood is arranged between two adjacent channel structures, the channel structure is connected to the air collecting hood adjacent to it, the air collecting hood is connected to the air collecting hood or the channel structure adjacent to it, a wire rope and a hook for a crane are installed in the channel structure, at least one channel structure is a steel outlet channel structure, the air curtain machine is connected to the air collecting hood or the steel outlet channel structure, the air curtain machine is used to form an air curtain for locking wind for the steel outlet channel structure, the dust collector includes an inlet, an outlet and a dust removal air duct formed between the inlet and the outlet, a plurality of filter cartridges are installed in the dust removal air duct, the main fan is installed at the outlet of the dust collector, and the main air duct is connected between the air outlets of the plurality of air collecting hoods and the inlet of the dust collector.

[0005] In some embodiments, the cover body assembly includes at least three channel structures, at least one channel structure is a maintenance channel structure, and at least one channel structure is a feed channel structure. The wire rope and hook of a crane for maintenance are installed in the maintenance channel structure, the wire rope and hook of a crane for feeding are installed in the feed channel structure, and the wire rope and hook of a crane for steel tapping are installed in the steel tapping channel structure.

[0006] In some embodiments, the air curtain type closure dust removal assembly further comprises:

[0007] At least two opening and closing doors are respectively installed on the inspection channel structure and the feed channel structure.

[0008] In some embodiments, at least one air mixing valve is installed in the main air duct, the air mixing valve is connected to the air supply duct, and the air supply duct is connected to the cold air source.

[0009] In some embodiments, the cover assembly further comprises:

[0010] A plurality of air regulating valves are respectively installed in the air paths of a plurality of air collecting hoods.

[0011] In some embodiments, the dust collector further comprises:

[0012] The guide plate is located in the dust removal air duct, closer to the inlet than the filter cartridge;

[0013] The porous uniform distribution plate is located in the dust removal air duct, closer to the outlet than the filter cartridge.

[0014] In some embodiments, the filter cartridges are arranged vertically, and a plurality of filter cartridges are evenly arranged in the dust removal air duct, and the distance between two adjacent filter cartridges is 1.4 to 1.6 times the diameter of the filter cartridge.

[0015] In some embodiments, the dust collector further comprises:

[0016] The ash hopper is arranged at intervals below the filter cartridge and is fixedly connected to the body of the dust collector.

[0017] In some embodiments, the air curtain type closed cover dust removal assembly further includes a dust cleaning component, and the dust cleaning component includes:

[0018] A clean air pipe is provided with at least one air jet nozzle, the air jet nozzle is directed toward the filter cartridge;

[0019] The compressed air pipe is fixedly connected to the dust collector, communicated with the clean air pipe, and is equipped with a pulse valve.

[0020] A smelting steel production system includes a smelting furnace and the above-mentioned air curtain type closed cover dust removal assembly, the cover body assembly of the air curtain type closed cover dust removal assembly is arranged above the smelting furnace, and one end of the channel structure is located above the smelting furnace.

[0021] The beneficial effects of the present application are as follows: a wind curtain type closed hood dust removal assembly is disclosed, comprising a hood assembly, at least one wind curtain machine, a dust collector, a main fan and a main air duct. When the wind curtain type closed hood dust removal assembly is specifically used, the hood assembly is located above a target including a smelting furnace, a plurality of air collecting hoods and at least two channel structures are arranged on the hood assembly, at least one channel structure is a steel tapping channel structure, the space below the steel tapping channel structure is a steel tapping area, and other channel structures except the steel tapping channel structure correspond to different functional areas, a steel wire rope and a hook of a crane are installed in the channel structure, and corresponding functions are realized by the crane; the channel structure is arranged between at least two air collecting hoods, an air collecting hood is arranged between two adjacent channel structures, the channel structure is connected to the air collecting hood adjacent to it, and the air collecting hood is connected to the air collecting hood or the channel structure adjacent to it The steel-outlet channel structure is connected by a wind curtain formed when the wind curtain machine is running to lock the wind. When the main fan is running, a negative pressure environment is formed in the dust collector, the main air duct and the air collecting hood. The smoke enters the main air duct through the air collecting hood, enters the dust removal air duct of the dust collector through the main air duct, and is filtered by multiple filter cartridges in the dust removal air duct. The cover body assembly with the channel structure and the air collecting hood can realize the closed cover steel-outlet working mode, and the smoke in the steel-outlet area is locked by the wind curtain machine, and the filtering efficiency is improved by arranging filter cartridges inside the dust collector. Compared with the existing semi-closed dust hood, the solution of the wind curtain type closed cover dust removal assembly of the present application can realize closed steel-outlet, so that the exhaust gas collection efficiency is higher, the problem of smoke diffusion inside the factory building is improved, a healthy working environment is maintained, and the emission of unorganized exhaust gas is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model.

[0023] Figure 1 A front view of an air curtain type closed cover dust removal assembly provided in the present application;

[0024] Figure 2 A top view of an air curtain type closed hood dust removal assembly provided in this application.

[0025] The attached drawings are marked with: 1-hood assembly, 11-air collecting hood, 111-air regulating valve, 12-channel structure, 121-steel outlet channel structure, 122-maintenance channel structure, 123-feed channel structure, 2-air curtain machine, 3-dust collector, 31-guide plate, 32-porous uniform distribution plate, 33-ash hopper, 34-clean air chamber, 4-main fan, 5-main air duct, 51-air mixing valve, 6-ash cleaning parts. DETAILED DESCRIPTION

[0026] The present application provides an air curtain type closed cover dust removal assembly, comprising a cover body assembly 1, at least one air curtain machine 2, a dust collector 3, a main fan 4 and a main air duct 5.

[0027] Please refer to Figure 1 and Figure 2 The cover assembly 1 includes a plurality of air collecting covers 11, and the cover assembly 1 includes at least two channel structures 12, and at least two channel structures 12 are relatively distributed. At least one channel structure 12 is a steel-outlet channel structure 121. When the wind curtain type closed cover dust removal assembly is used in a specific application, the cover assembly 1 is located above the target including the smelting furnace, and the space below the steel-outlet channel structure 121 is the steel-outlet area. The other channel structures 12 except the steel-outlet channel structure 121 correspond to different functional areas, and these functions include but are not limited to feeding and maintenance. The steel wire rope and hook of the crane are installed in the channel structure 12. The crane is also called a crane. The steel wire rope and hook cooperate with the crane to operate, and the corresponding functions are realized through the cooperation of the crane.

[0028] Please refer to Figure 1 and Figure 2 The channel structure 12 is disposed between at least two gas collecting hoods 11, a gas collecting hood 11 is disposed between two adjacent channel structures 12, the channel structure 12 is connected to the adjacent gas collecting hood 11, and the gas collecting hood 11 is connected to the adjacent gas collecting hood 11 or the channel structure 12. Please refer to Figure 2 The air curtain machine 2 is connected to the air collecting hood 11 or the steel outlet channel structure 121 so that the air curtain machine 2 and the steel outlet channel structure 121 are relatively fixed. The air curtain machine 2 generates an air curtain when running, and the air curtain locks the wind of the steel outlet channel structure 121 to prevent smoke from escaping from the steel outlet channel structure 121.

[0029] The dust collector 3 includes an inlet, an outlet, and a dust removal air duct formed between the inlet and the outlet, and a plurality of filter cartridges are installed in the dust removal air duct. The main fan 4 is installed at the outlet of the dust collector 3, and the main air duct 5 is connected between the air outlets of the plurality of air collecting hoods 11 and the inlet of the dust collector 3. When the main fan 4 is in operation, a negative pressure environment is formed in the dust collector 3, the main air duct 5, and the air collecting hood 11. The smoke enters the main air duct 5 through the air collecting hood 11, enters the dust removal air duct of the dust collector 3 through the main air duct 5, and is filtered by the plurality of filter cartridges in the dust removal air duct.

[0030] By means of the cover assembly 1 having the channel structure 12 and the air collecting cover 11, a closed cover steel tapping working mode can be realized, and the smoke in the steel tapping area can be locked by the air curtain machine 2, and the filtering efficiency can be improved by setting a filter cartridge inside the dust collector 3. Compared with the existing semi-closed dust hood, the solution of the air curtain type closed cover dust removal assembly of the present application can realize closed steel tapping, make the waste gas collection efficiency higher, improve the problem of smoke diffusion inside the factory building, maintain a healthy working environment, and have the advantage of lower unorganized waste gas emissions.

[0031] In some embodiments, see Figure 1 and Figure 2 At least one air mixing valve 51 is installed in the main air duct 5, and the air mixing valve 51 is connected to the air supply duct, and the air supply duct is connected to the cold air source. When the air mixing valve 51 is opened, cold air is supplied to the main air duct 5 to reduce the temperature of the smoke in the main air duct 5, so that the temperature of the smoke when reaching the filter cartridge is within the normal operating temperature range of the filter cartridge.

[0032] In some embodiments, two air mixing valves 51 are installed at intervals on the main air duct 5 . To protect the filter cartridge for long-term use, the filter cartridge is resistant to high temperatures of 120°C. The diameter of the air mixing valve 51 is set to 300 mm. When the smoke temperature in the main air duct 5 corresponding to the position of the first air mixing valve 51 reaches 120°C, the first air mixing valve 51 is opened to half of the maximum opening degree; when the smoke temperature in the main air duct 5 corresponding to the position of the first air mixing valve 51 reaches 130°C, the first air mixing valve 51 is fully opened; the first air mixing valve 51 and the second air mixing valve 51 are separated by a distance of about 15 meters. The temperature drop of the smoke in the main air duct 5 from the first air mixing valve 51 to the second air mixing valve 51 is about 9.8°C. When the smoke temperature in the main air duct 5 corresponding to the position of the second air mixing valve 51 reaches 110.2°C, the second air mixing valve 51 is opened to half of the maximum opening degree; when the smoke temperature in the main air duct 5 corresponding to the position of the second air mixing valve 51 reaches 100°C, the second air mixing valve 51 is fully opened, so that the temperature of the smoke reaching the filter cartridge is within the normal use temperature of the filter cartridge.

[0033] This component performs total suction balance calculation when used. Regarding total suction volume: set the wind speed of main fan 4 outlet to 24.6 m / s and the flow rate to 100000m 3 / h, the pressure loss through the filter cartridge is 1500Pa, the pressure loss through the pipeline is 300Pa, and the air volume loss is 0.0002%, which can be ignored. Regarding the air intake of the hood: There are 12 hoods in total, and the air intake of each hood is 8333m 3 / h, the hood outlet wind speed V = Q / 3600S, Q is the air volume, S is the hood outlet area, the calculated hood outlet wind speed is 0.5 m / s. Regarding the main dust balance: when tapping steel, the average flue gas flow rate is 15 m / s, 0.6×0.6×3.14m 2 ×15m / s×3600=61042m 3 / h, and the steel-out time is about 3 minutes. Calculated at the highest flue gas velocity, the amount of smoke generated is 101736m 3 / h×3min÷60=3052m 3 The time required for the fan to absorb the smoke is: 3052m 3 ÷100000m 3 / h×60=1.83min=110s, which can meet the requirement of sucking away all the smoke generated during 3 minutes of steel tapping. Regarding mixed air balance: when the smoke temperature exceeds 120℃, the two mixed air valves are opened, and the air supply volume is calculated based on the half opening of the mixed air valve 51, which is 0.6*0.6*3.14*24.6*2 / 2=27.8m 3 / s, according to the calculation of 3min when steel is discharged, the required air volume is 27.8*60*3=5004m 3 . Regarding the air volume balance of dust collection and mixed air operation: When the air is replenished, the air volume balance is: (5004+3052) / 100000m 3 / h×60=4.8min=288s, so when air supply is introduced, it takes 4.8min to remove the 3052m3 generated during steel production. 3 Combined with the above calculation, when steel is tapped, the smoke absorption capacity of each hood 11 is 8333m 3 / h, total dust collection capacity is 100000m 2 / h, the total absorption capacity of the gas collecting hood 11 is calculated to be 1667m 3 / min, according to the ratio of suction and make-up air is 1, the suction volume of the suction hood and the air mixing valve 51 is equal, so the suction of the two does not interfere with each other. Within 3 minutes of steel tapping, the air volume of make-up air is 2502m 3 The air volume of the air collecting hood 11 is also 2502m 3 .

[0034] In some embodiments, see Figure 1 and Figure 2 The cover assembly 1 includes at least three channel structures 12, at least one channel structure 12 is a maintenance channel structure 122, and at least one channel structure 12 is a feed channel structure 123. The wire rope and hook of the crane for maintenance are installed in the maintenance channel structure 122, the wire rope and hook of the crane for feeding are installed in the feed channel structure 123, and the wire rope and hook of the crane for steel tapping are installed in the steel tapping channel structure 121. When the air curtain type closed cover dust removal assembly is used in a specific application, the cover assembly 1 is located above the target including the smelting furnace, the space below the steel tapping channel structure 121 is the steel tapping area, the space below the maintenance channel structure 122 is the area reserved for later maintenance, and the space below the feed channel structure 123 is the feed area.

[0035] In some embodiments, see Figure 1 and Figure 2, the cover assembly 1 is only provided with three channel structures 12, namely, the maintenance channel structure 122, the feed channel structure 123 and the steel-outlet channel structure 121. In some embodiments, the maintenance channel structure 122, the feed channel structure 123 and the steel-outlet channel structure 121 are arranged in sequence.

[0036] In some embodiments, the air curtain type closed cover dust removal assembly further includes at least two opening and closing doors, which are installed on the inspection channel structure 122 and the feed channel structure 123, and the opening and closing doors can be in the form of pneumatic doors. During the smelting process, the opening and closing doors are in a closed state. Due to the provision of the opening and closing doors, the inspection channel structure 122 and the feed channel structure 123 no longer require a wind lock design.

[0037] In some embodiments, the cover body assembly 1 further includes a plurality of air regulating valves 111, and the plurality of air regulating valves 111 are respectively installed in the air paths of the plurality of air collecting hoods 11, and each air collecting hood 11 is installed with at least one air regulating valve 111, and the air volume and smoke concentration are controlled by the air regulating valves 111 to achieve the purpose of preventing smoke from overflowing.

[0038] If the local wind speed of the airflow in the dust collector 3 is too high, it will have a great impact on the life of the filter cartridge in these areas, which will lead to a reduction in the life of the filter cartridge. Therefore, the airflow distribution technology in the dust collector 3 is one of the key technologies of the dust collector 3. In engineering practice, although there are no relevant standards in this regard, the uniformity is generally required to be greater than 95%. The airflow distribution in the filter cartridge dust collector 3 is related to the air intake and exhaust methods, the structural layout of the dust collector 3, and the flow equalization measures taken.

[0039] In some embodiments, reference may be made to Figure 2 The dust collector 3 also includes a guide plate 31 and a porous uniform distribution plate 32. The guide plate 31 is located in the dust removal air duct. The guide plate 31 is closer to the inlet than the filter cartridge. The shape of the guide plate 31 includes but is not limited to a cylindrical shape. The guide plate 31 can be as follows Figure 2The multi-porous uniformly distributed plate 32 is arranged vertically in the dust removal air duct, and the multi-porous uniformly distributed plate 32 is closer to the outlet than the filter cartridge. The flue gas enters the dust collector 3 through the main air duct 5, passes through the guide plate 31 in the dust collector 3, and flows to the filter cartridge after being distributed and rectified by the guide plate 31, and enters the inside of the filter cartridge through the air inlet of the filter cartridge. The filter cartridge filters the flue gas through external filtration. Coarse dust mainly falls by gravity and inertial collision, and fine dust is mainly captured by screening. The dust is retained on the outer surface of the filter cartridge. The purified flue gas flows upward along the inside of the filter cartridge, passes through the multi-porous uniformly distributed plate 32 and enters the clean air chamber 34. The clean air chamber 34 is located above the multi-porous uniformly distributed plate 32, and after being collected in the clean air chamber 34, it flows from the tail outlet to the induced draft fan. By setting the guide plate 31 and the porous uniform distribution plate 32 to adjust the air volume, the air flow can be organized and guided to flow into the predetermined space, and the air volume can be evenly transported and distributed to each filter cartridge chamber to ensure that the filter material of the filter cartridge is not damaged by erosion and the long service life of the filter material is guaranteed. By comparing the results of computer simulation experiments and laboratory similar simulation experiments, the device form of the best air volume distribution and airflow distribution parameters is determined, and adjustments and corrections are made through field tests.

[0040] The dust-laden gas enters the chamber of each filter cartridge through the guide pipe. In some embodiments, the filter cartridge is arranged vertically, and multiple filter cartridges are evenly arranged in the dust removal air duct. The distance between two adjacent filter cartridges is 1.4 to 1.6 times the diameter of the filter cartridge. The air inlet of the filter cartridge is designed to be closer to the top. In a scheme where the filter cartridge is 3 meters long, the air inlet of the filter cartridge is 2.5 meters away from the bottom of the filter cartridge. By designing the distance between the bottom of the filter cartridge and the upper opening of the air inlet, the vertical distance between the bottom of the filter cartridge and the upper opening of the air inlet has a reasonable enough clearance. The distance between the filter cartridges is also specially designed. After the airflow passes through the front guide, it is naturally distributed based on the principle of resistance distribution, so that the airflow in the entire filter chamber and the resistance of each space are evenly distributed, ensuring a reasonable smoke lifting speed, minimizing turbulence, and preventing secondary dust.

[0041] The wind curtain type closed cover dust removal assembly provided in the present application has improved the air inlet distribution system. The uniform and porous airflow inlet distribution system can minimize turbulence, prevent secondary dust, and ensure that the dust-containing gas can be evenly distributed to every part of the chamber cross section after being guided by the air inlet distribution system.

[0042] In some embodiments, see Figure 1 The dust collector 3 further includes an ash hopper 33, which is arranged below the filter cartridge at intervals, and is fixedly connected to the body of the dust collector 3. The filter cartridge filters the flue gas by external filtration, and coarse dust falls into the ash hopper 33 mainly by gravity and inertial collision. In some embodiments, the angle between the inclined side wall of the ash hopper 33 and the horizontal direction is greater than 60°, ensuring that the ash can flow freely downward along the inclined side wall of the ash hopper 33.

[0043] In some embodiments, the air curtain type closed cover dust removal assembly further includes a dust cleaning member 6, through which the filter cartridge is cleaned. The dust cleaning member 6 includes a clean air pipe and a compressed air pipe, the clean air pipe is provided with at least one air jet nozzle, the air jet nozzle faces the filter cartridge, the compressed air pipe is fixedly connected to the dust collector 3, the compressed air pipe is communicated with the clean air pipe, a pulse valve is installed on the compressed air pipe, and the compressed air pipe is connected to an air source. When the pulse valve is controlled to open, compressed air is sprayed to the filter cartridge through the air jet nozzle to complete the cleaning of the filter cartridge. The pulse valve can be controlled by the control system of the dust collector 3.

[0044] In some embodiments, the filter cartridge flower plate holes are smooth and free of burrs, the flower plate surface deformation is small, the flatness deviation is less than 1 / 1000, the flower plate hole center deviation is <0.01mm, and the aperture deviation is ≤0.01mm.

[0045] The present application also provides a smelting and steel production system, including a smelting furnace and the above-mentioned air curtain type closed hood dust removal assembly, the smelting furnace includes but is not limited to an electric arc furnace, the hood assembly 1 of the air curtain type closed hood dust removal assembly is higher than the smelting furnace, and the hood is arranged above the smelting furnace, one end of the channel structure 12 is located above the smelting furnace, and the channel structure 12 includes a maintenance channel structure 122, a feeding channel structure 123 and a steel-outlet channel structure 121, which cooperate to realize the maintenance process, the feeding process and the steel-outlet process respectively.

[0046] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0047] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An air curtain type closed cover dust removal assembly, characterized in that: include: A cover assembly includes a plurality of air collecting covers and at least two opposite channel structures, wherein the channel structure is arranged between at least two of the air collecting covers, and the air collecting covers are arranged between two adjacent channel structures, the channel structure is connected to the adjacent air collecting covers, the air collecting covers are connected to the adjacent air collecting covers or the channel structures, and a steel wire rope and a hook for a crane are installed in the channel structure; At least one air curtain machine, at least one of the channel structures is a steel-outlet channel structure, the air curtain machine is connected to the air collecting hood or the steel-outlet channel structure, and the air curtain machine is used to form an air curtain to lock the steel-outlet channel structure; A dust collector comprises an inlet, an outlet and a dust removal air duct formed between the inlet and the outlet, wherein a plurality of filter cartridges are installed in the dust removal air duct; A main fan installed at the outlet of the dust collector; The main air duct is connected between the air outlets of the plurality of air collecting hoods and the inlet of the dust collector.

2. The air curtain type closed cover dust removal assembly according to claim 1, characterized in that: The cover body assembly includes at least three channel structures, at least one of which is a maintenance channel structure, and at least one of which is a feed channel structure. A steel wire rope and a hook for a crane for maintenance are installed in the maintenance channel structure, a steel wire rope and a hook for a crane for feeding are installed in the feed channel structure, and a steel wire rope and a hook for a crane for steel tapping are installed in the steel tapping channel structure.

3. The air curtain type closed cover dust removal assembly according to claim 2, characterized in that: The air curtain type closed cover dust removal component also includes: At least two opening and closing doors are respectively installed on the inspection channel structure and the feed channel structure.

4. The air curtain type closed cover dust removal assembly according to claim 1, characterized in that: The main air duct is equipped with at least one air mixing valve, the air mixing valve is connected to a make-up air duct, and the make-up air duct is connected to a cold air source.

5. The air curtain type closed cover dust removal assembly according to claim 1, characterized in that: The cover assembly also includes: A plurality of air regulating valves are respectively installed in the air paths of the plurality of air collecting hoods.

6. The air curtain type closed cover dust removal assembly according to claim 1, characterized in that: The dust collector also includes: a guide plate, located in the dust removal air duct and closer to the inlet than the filter cartridge; The porous uniform distribution plate is located in the dust removal air duct and is closer to the outlet than the filter cartridge.

7. The air curtain type closed cover dust removal assembly according to claim 6, characterized in that: The filter cartridges are arranged vertically, and a plurality of the filter cartridges are evenly arranged in the dust removal air duct, and a distance between two adjacent filter cartridges is 1.4 to 1.6 times the diameter of the filter cartridge.

8. The air curtain type closed cover dust removal assembly according to claim 1, characterized in that: The dust collector also includes: The ash hopper is arranged below the filter cartridge at intervals and is fixedly connected to the body of the dust collector.

9. The air curtain type closed cover dust removal assembly according to claim 6, characterized in that: The air curtain type closed cover dust removal assembly also includes a dust cleaning component, and the dust cleaning component includes: A clean air pipe, provided with at least one air nozzle, the air nozzle facing the filter cartridge; A compressed air pipe is fixedly connected to the dust collector, communicated with the clean air pipe, and is equipped with a pulse valve.

10. A smelting and steel production system, characterized in that: include: Melting furnace; According to any one of claims 1 to 9, the cover body assembly of the wind curtain type closed hood dust removal assembly is arranged above the smelting furnace, and one end of the channel structure is located above the smelting furnace.

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