Water-cooled furnace cover of submerged arc furnace

Abstract

The utility model discloses a submerged arc furnace water-cooling furnace cover, which belongs to the field of metallurgical industry equipment, and comprises a furnace cover, a smoke outlet is arranged on the side edge of the bottom end of the furnace cover, a square pipe is connected onto the smoke outlet, a plurality of clamping groove groups are arranged on the inner wall of the square pipe, a filter screen group is slidably connected in each clamping groove group, and a water inlet is formed in the bottom end of the furnace cover. A smoke exhaust pipe is connected to the side edge close to the upper portion of the filter screen set, a first sliding groove is formed in the inner wall, located above the filter screen set, of the square pipe, a second sliding groove is formed in the smoke outlet, a first baffle and a second baffle are slidably connected into the first sliding groove and the second sliding groove respectively, a support is arranged above the first baffle, a motor is arranged at the lower end of the support, and a smoke outlet is formed in the lower end of the motor. And one side of the upper part of the square pipe is connected with a dust suction pipe, so that the problem that the filter screen is frequently blocked by large-particle impurities in waste gas in the furnace is solved.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical industrial equipment, and more specifically, to a water-cooled furnace cover for a submerged arc furnace. Background Technology

[0002] Water-cooled furnace covers are an important component of submerged arc furnace equipment. Submerged arc furnace covers made with water-cooled structures (such as water-cooled boxes and water pipes) are widely used in many fields such as ferroalloy production, calcium carbide production, and industrial silicon production.

[0003] The water-cooled furnace cover of an electric arc furnace primarily utilizes the high heat capacity and excellent thermal conductivity of water to achieve its cooling function. The cover contains internal water-cooling pipes. When the cover is subjected to radiation and conduction of heat from the high temperature inside the furnace during operation, the heat is transferred to the walls of the water-cooling pipes. The cooling water circulates within these pipes, absorbing the heat transferred from the pipe walls. The heated water then flows out of the water-cooled furnace cover and into other parts of the cooling system.

[0004] Although the furnace cover is equipped with a flue pipe to effectively filter the flue gas, the large number of particulate impurities mixed in the exhaust gas in the electric arc furnace can easily clog the filter screen. Frequent clogging not only seriously affects the smooth discharge of flue gas, but also forces enterprises to replace the filter screen frequently, thereby increasing maintenance costs and significantly reducing production efficiency. Therefore, there is an urgent need for a new type of water-cooled furnace cover for electric arc furnaces to solve the problem of frequent clogging of the filter screen by large particulate impurities in the exhaust gas inside the furnace. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a water-cooled furnace cover for a submerged arc furnace to solve the problems mentioned in the background art.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A water-cooled furnace cover for a submerged arc furnace includes a furnace cover with a flue gas outlet on the bottom side. A square tube is connected to the flue gas outlet. The inner wall of the square tube has multiple slot groups, and a filter screen group is slidably connected within each slot group. A flue gas pipe is connected to the side near the upper part of the filter screen group. A first sliding groove is provided on the inner wall of the square tube above the filter screen group, and a second sliding groove is provided at the flue gas outlet. A first baffle and a second baffle are slidably connected within the first and second sliding grooves, respectively. A bracket is provided above the first baffle, and a motor is provided at the lower end of the bracket. A fan blade is connected to the output shaft of the motor, and a dust suction pipe is connected to one side of the upper part of the square tube.

[0008] Furthermore, the filter assembly includes: a first filter, a second filter, and a third filter, wherein the filter mesh sizes are arranged from largest to smallest as follows: first filter, second filter, and third filter. The slot assembly includes: a first slot, a second slot, and a third slot, wherein the first filter, the second filter, and the third filter are slidably connected in sequence within the first slot, the second slot, and the third slot, respectively.

[0009] Furthermore, a dust collection box is connected to the bottom of the suction pipe.

[0010] Furthermore, the first baffle and the second baffle are provided with handles extending to the outside of the square tube on one side.

[0011] Furthermore, the furnace cover is provided with a water inlet and a water outlet at the center and edge, respectively, and the water inlet and the water outlet are respectively connected to the beginning and end of a cold water pipe.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] (1) This solution sets up a first baffle to block the normal passage of flue gas, preventing flue gas from continuing to pass through the filter group during the cleaning process, thus avoiding interference with the cleaning work and secondary pollution to the environment. At the same time, the second baffle is opened and the motor drives the fan blades to rotate, sucking up the particulate impurities attached to the surface of the filter group. The impurities are then carried by the airflow and discharged into the dust collection box along the suction pipe, realizing the rapid cleaning of the filter group, extending the service life of the filter group, and reducing the replacement frequency and maintenance costs.

[0014] (2) This solution uses a first filter, a second filter, and a third filter arranged in descending order of aperture in a square tube to gradually filter and purify the flue gas. Particles of different sizes are intercepted in the corresponding filter layers, avoiding serious clogging caused by the mixing and accumulation of particles of various sizes in the same filter layer.

[0015] (3) This solution provides water inlet and outlet at the center and edge of the furnace cover respectively. The heat absorbed and accumulated in the center of the furnace cover is higher than that at the edge of the furnace cover. By setting water inlet and outlet in different areas, the overall temperature of the furnace cover can be quickly, evenly and efficiently controlled, ensuring that the water-cooled furnace cover maintains a stable performance state under harsh operating conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the filter assembly structure of this utility model;

[0018] Figure 3 This is a top view of the furnace cover of this utility model.

[0019] Explanation of the labels in the diagram:

[0020] 1. Furnace lid; 2. Smoke outlet; 3. Square tube; 4. Smoke exhaust pipe; 5. First slide groove; 6. Second slide groove; 7. First baffle; 8. Second baffle; 9. Handle; 10. Bracket; 11. Motor; 12. Fan blade; 13. Dust suction pipe; 14. First filter screen; 15. Second filter screen; 16. Third filter screen; 17. First slot; 18. Second slot; 19. Third slot; 20. Dust collection box; 21. Water inlet; 22. Water outlet; 23. Cold water pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-3 The system includes a furnace cover 1, a flue gas outlet 2 at the bottom side of the furnace cover 1, a square tube 3 connected to the flue gas outlet 2, and multiple slots on the inner wall of the square tube 3. A filter screen is slidably connected within each slot, effectively intercepting various pollutants from large slag fragments to fine dust impurities, significantly reducing the dust content in the exhaust gas. A flue gas pipe 4 is connected to the upper side of the slots near the filter screen. A first sliding groove 5 is provided on the inner wall of the square tube 3 above the filter screen, and a second sliding groove 6 is provided at the flue gas outlet 2. A first baffle 7 and a second baffle 8 are slidably connected within the first sliding groove 5 and the second sliding groove 6, respectively. Opening the second baffle 7 ensures unobstructed flue gas flow. When maintenance is required... When replacing or cleaning the filter, pull the second baffle 7 to close it. The smooth track of the slide will quickly seal the flue gas passage and completely block the flow of flue gas. Open the second baffle 8. A bracket 10 is provided above the first baffle 7 of the slot assembly. A motor 11 is provided at the lower end of the bracket 10 of the slot assembly. The output shaft of the motor 11 is connected to the fan blade 12. The motor 11 drives the fan blade 12 to rotate. A suction pipe 13 is connected to one side of the upper part of the square tube 3 of the slot assembly. A strong negative pressure suction zone is formed in the square tube 3 to suck up the particulate impurities attached to the surface of the filter assembly. The impurities are then carried by the airflow and discharged into the dust collection box along the suction pipe, realizing the rapid cleaning of the filter assembly, extending the service life of the filter assembly, and reducing the replacement frequency and maintenance costs.

[0023] Please see Figure 2The filter screens in the slot group are arranged from largest to smallest as first filter screen 14, second filter screen 15, and third filter screen 16. The first slot 17, second slot 18, and third slot 19 of the slot group are respectively connected to the first filter screen 14, second filter screen 15, and third filter screen 16 in sequence. The first filter screen 14 intercepts large particles of impurities, achieving preliminary filtration. The second filter screen 15 has a slightly smaller pore size and filters medium-sized particles of impurities. The third filter screen 16 has the smallest pore size and filters fine dust, achieving gradual filtration and purification of flue gas. Particles of different sizes are intercepted in the corresponding filter layers, avoiding serious clogging problems caused by the mixing and accumulation of particles of various sizes in the same filter layer.

[0024] Please see Figure 3 The furnace cover 1 is provided with a water inlet 21 and a water outlet 22 at the middle and edge of the furnace cover 1, respectively. The water inlet 21 and the water outlet 22 are connected to the beginning and end of the cold water pipe 23, respectively. The heat absorbed and accumulated in the middle of the furnace cover 1 is higher than that at the edge of the furnace cover 1. The water inlet 21 and the water outlet 22 are set in different areas to achieve rapid, balanced and efficient regulation of the overall temperature of the furnace cover 1, and ensure that the water-cooled furnace cover maintains a stable performance state in harsh operating environments.

[0025] The working principle is as follows:

[0026] When the electric arc furnace is working, the flue gas generated enters the square pipe 3 connected to it through the flue gas outlet 2 on the side of the bottom of the furnace cover 1. In the square pipe 3, the flue gas is filtered by a series of filter screens. The first filter screen 14 can intercept larger dust and impurities, the second filter screen 15 further filters medium-sized particles, and the third filter screen 16 captures smaller particles, thereby achieving gradual purification of the flue gas and making the discharged flue gas cleaner. When it is necessary to clean the filter screen, the second baffle 8 can be closed and the first baffle 7 can be opened. The motor 11 can be started to drive the fan blade 12 to rotate, forming a strong negative pressure suction zone in the square pipe 3, which sucks up the dust and other impurities remaining in the square pipe 3. The bottom of the suction pipe 13 is connected to the dust collection box 20. The sucked-up dust and other impurities will be collected in the dust collection box 20, further maintaining the cleanliness of the environment inside the square pipe 3, and also helping to improve the overall flue gas quality and the operational stability of related equipment.

[0027] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A water-cooled furnace cover for an electric arc furnace, characterized in that ,Including the furnace cover (1), the bottom end side of the furnace cover (1) is provided with a smoke outlet (2), the smoke outlet (2) is connected with a square tube (3), the inner wall of the square tube (3) is provided with a plurality of card slot groups, the card slot group is slidably connected with a filter screen group, the exhaust pipe (4) is connected to the side edge near the filter screen group, the first sliding groove (5) is arranged on the inner wall of the square tube above the filter screen group, the second sliding groove (6) is arranged at the smoke outlet (2), the first baffle (7) and the second baffle (8) are slidably connected in the first sliding groove (5) and the second sliding groove (6) respectively, the first baffle (7) is provided with a support (10) above, the lower end of the support (10) is provided with a motor (11), the output shaft of the motor (11) is connected with a fan blade (12), the dust suction pipe (13) is connected to one side of the upper part of the square tube (3).

2. A water cooled furnace cover for an ore smelting furnace as claimed in claim 1, wherein The filter screen group includes: a first filter screen (14), a second filter screen (15) and a third filter screen (16), the filter screen aperture is arranged in descending order as the first filter screen (14), the second filter screen (15) and the third filter screen (16), the card slot group includes: a first card slot (17), a second card slot (18) and a third card slot (19), the first filter screen (14), the second filter screen (15) and the third filter screen (16) are slidably connected in the first card slot (17), the second card slot (18) and the third card slot (19) respectively.

3. A water cooled furnace cover for an ore smelting furnace as claimed in claim 1, characterised in that The dust suction pipe (13) is connected with a dust collecting box (20) at the bottom.

4. A water cooled furnace cover for an ore smelting furnace as claimed in claim 1, wherein The first baffle (7) and the second baffle (8) extend to the outside of the square tube (3) on one side and are provided with a handle (9).

5. A water cooled furnace cover for an ore smelting furnace as claimed in claim 1, wherein The water inlet (21) and the water outlet (22) are respectively arranged at the middle and the edge of the furnace cover (1), and the first end and the end of the cold water pipe (23) are respectively connected with the water inlet (21) and the water outlet (22).

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