Submerged arc furnace flue gas waste heat recovery device

Abstract

The utility model belongs to the technical field of flue gas waste heat recovery, and particularly relates to a flue gas waste heat recovery device for a submerged arc furnace. Comprising a filtering barrel, a waste heat recycling box, a preheating assembly and a filtering assembly. One end of the filter barrel is connected with a smoke outlet of the submerged arc furnace, a smoke outlet of the filter barrel is connected with a smoke inlet of the waste heat recovery box, and smoke generated by the submerged arc furnace reaches the waste heat recovery box through the filter barrel; a plurality of preheating assemblies are arranged in the waste heat recovery box at equal intervals, and the preheating assembly close to one side of the filter barrel is connected with a smoke outlet of the filter barrel through a guide plate; the filtering assembly is detachably connected to the lower part of the filtering barrel and is used for filtering tiny solid particles in the flue gas. The flue gas waste heat recovery device for the submerged arc furnace is high in flue gas solid particle removal efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas waste heat recovery, and more specifically relates to a device for recovering flue gas waste heat from a submerged arc furnace. Background Art

[0002] In the prior art, in order to treat the flue gas, the flue gas is treated before being recycled. During the treatment, the solid particles in the flue gas will clog the mesh of the filter inside the treatment mechanism, resulting in reduced filtration efficiency and affecting the treatment efficiency. At the same time, the existing device is not convenient for maintenance inside the recovery box. Moreover, the tiny particles in the flue gas are easy to accumulate in the recovery phase, and the accumulation to a certain extent will directly cause the blockage of the smoke exhaust port. In order to solve the above-mentioned problems, we propose a waste heat recovery device for flue gas from an electric arc furnace. Summary of the invention

[0003] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a submerged arc furnace flue gas waste heat recovery device to solve the problem that the filter screen inside the existing treatment mechanism is easily blocked and inconvenient to maintain.

[0004] A device for recovering waste heat from flue gas of an induction furnace, comprising a filter barrel, a waste heat recovery box, a preheating component and a filter component; one end of the filter barrel is connected to the smoke exhaust port of the induction furnace, the smoke outlet of the filter barrel is connected to the smoke inlet of the waste heat recovery box, and the smoke generated by the induction furnace reaches the waste heat recovery box through the filter barrel; a plurality of preheating components are arranged at equal intervals in the waste heat recovery box, and the preheating component close to one side of the filter barrel is connected to the smoke exhaust port of the filter barrel through a guide plate; the filter component is detachably connected to the lower part of the filter barrel, and the filter component filters tiny solid particles in the smoke.

[0005] Furthermore, the filter assembly includes a sieve plate, a scraper and circumferential teeth, wherein the sieve plates are symmetrically arranged on both sides of the filter assembly, the circumferential teeth are arranged in the middle of the two scrapers, the circumferential teeth are fixed to the rotating shaft through a fixed connecting plate, the circumferential teeth are meshed with active teeth provided on the upper part of the filter barrel, and the active teeth are driven by a driving motor; the rotating shaft passes through the sieve plate, and both ends of the rotating shaft extend out of the side walls of the sieve plate, the scraper is fixed to the extended end of the rotating shaft, and stainless steel wire bristles are provided on the side of the scraper close to the sieve plate.

[0006] Furthermore, a high-pressure nozzle is provided on the top of the waste heat recovery box, the water outlet of the high-pressure nozzle is inclined toward the preheating component, the high-pressure nozzle is connected to a high-pressure water pipe provided on the outside of the waste heat recovery box, and the high-pressure water pipe is connected to an external high-pressure water pump.

[0007] Furthermore, a drain outlet is provided at the bottom of the waste heat recovery box.

[0008] Furthermore, the preheating assembly is provided with a smoke guide pipe, a smoke inlet and a smoke outlet, and a partition is provided between the smoke inlet and the smoke outlet; one end of the smoke guide pipe is connected to the smoke inlet, and the other end of the smoke guide pipe is connected to the smoke outlet.

[0009] Furthermore, a material drop opening is provided at the bottom of the filter assembly, and the material drop opening is located directly below the scraper.

[0010] In summary, due to the adoption of the above technical solution, the beneficial technical effects of the utility model are:

[0011] A device for recovering waste heat from flue gas of an ore-fired furnace prevents solid particles in the flue gas from clogging the mesh of a filter screen by cooperating with a sieve plate, a scraper, circumferential teeth and a driving motor on a filter assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model.

[0013] Figure 2 For this utility model Figure 1 Top view of the .

[0014] Figure 3 For this utility model Figure 1 Schematic diagram of the cross section along the AA direction.

[0015] Figure 4 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 5 It is a three-dimensional structural schematic diagram of the filter assembly of the utility model.

[0017] Figure 6 It is a schematic structural diagram of the preheating component 3 of the utility model.

[0018] Figure 7 for Figure 6 Schematic diagram of the cross section of the preheating component in the BB direction.

[0019] In the figure: filter barrel 1, waste heat recovery box 2, preheating component 3, filter component 4, high-pressure nozzle 5, high-pressure water pipe 6, drain port 7, drive motor 8, circumferential teeth 9, active teeth 10, scraper 11, sieve plate 12, drop port 13, rotating shaft 14, guide plate 15, smoke guide pipe 16, smoke inlet 17, fixed connecting plate 18, smoke outlet 19, partition 20. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model. Example 1

[0021] In this embodiment, Figure 1-7 As shown, a waste heat recovery device for flue gas from an induction furnace comprises a filter barrel 1, a waste heat recovery box 2, a preheating component 3 and a filter component 4; one end of the filter barrel 1 is connected to the smoke exhaust port of the induction furnace, the smoke outlet of the filter barrel 1 is connected to the smoke inlet of the waste heat recovery box 2, and the smoke generated by the induction furnace reaches the waste heat recovery box 2 through the filter barrel 1; a plurality of preheating components 3 are arranged at equal intervals in the waste heat recovery box 2, and the preheating component 3 close to one side of the filter barrel 1 is connected to the smoke exhaust port of the filter barrel 1 through a guide plate 15; the filter component 4 is detachably connected to the lower part of the filter barrel 1, and the filter component 4 filters tiny solid particles in the smoke. The filter assembly 4 includes a sieve plate 12, a scraper 11 and a circumferential tooth 9, wherein the sieve plate 12 is symmetrically arranged on both sides of the filter assembly 4, the circumferential tooth 9 is arranged in the middle of the two scrapers, the circumferential tooth 9 is fixed to the rotating shaft 14 through a fixed connecting plate 18, and the circumferential tooth 9 is meshed with the active tooth 10 provided on the upper part of the filter barrel 1, and the active tooth 10 is driven by the driving motor 8, and the driving motor 8 drives the circumferential tooth 9 to rotate when working; the rotating shaft 14 passes through the sieve plate 12, and the two ends of the rotating shaft 14 extend out of the side wall of the sieve plate 12, and the scraper 11 The extended end of the scraper 11 is fixed to the rotating shaft 14, and stainless steel wire bristles are provided on one side of the scraper 11 close to the sieve plate 12. When the circumferential teeth 9 rotate, the scraper 11 is driven to rotate. The rotation of the scraper 11 scrapes off the solid particles on the sieve plate 12. In order to achieve rapid cooling of the preheating component 3, a high-pressure nozzle 5 is provided on the top of the waste heat recovery box 2. The water outlet of the high-pressure nozzle 5 is inclined toward the preheating component 3. The high-pressure nozzle 5 is connected to a high-pressure water pipe 6 provided on the outside of the waste heat recovery box 2, and the high-pressure water pipe 6 is connected to an external high-pressure water pump.

[0022] In order to discharge the coolant in the waste heat recovery tank 2 in time, a drain port 7 is provided at the bottom of the waste heat recovery tank 2 . Example 2

[0023] In this embodiment, Figure 7 As shown, in order to enable the smoke entering the preheating component 3 to be cooled promptly and efficiently, the preheating component 3 is provided with a smoke guiding duct 16, a smoke inlet 17 and a smoke outlet 19, and a partition 20 is provided between the smoke inlet 17 and the smoke outlet 19; one end of the smoke guiding duct 16 is connected to the smoke inlet 17, and the other end of the smoke guiding duct 16 is connected to the smoke outlet 19. Example 3

[0024] In this embodiment, Figure 5 As shown, in order to prevent the scraped flue gas particles from accumulating excessively in the filter barrel 1 , a drop opening 13 is provided at the bottom of the filter assembly 4 , and the drop opening 13 is located directly below the scraper 11 .

[0025] The above description is a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A submerged arc furnace flue gas waste heat recovery device, comprising a filter barrel (1), a waste heat recovery box (2), a preheating component (3) and a filter component (4); Features: One end of the filter barrel (1) is connected to the smoke outlet of the ore-fired furnace, and the smoke outlet of the filter barrel (1) is connected to the smoke inlet of the waste heat recovery box (2); a plurality of preheating components (3) are arranged at equal intervals in the waste heat recovery box (2), and the preheating component (3) close to one side of the filter barrel (1) is connected to the smoke outlet of the filter barrel (1) via a guide plate (15); the filter component (4) is detachably connected to the lower part of the filter barrel (1), and the filter component (4) filters tiny solid particles in the smoke.

2. A submerged arc furnace flue gas waste heat recovery device according to claim 1, Features: The filter assembly (4) comprises a sieve plate (12), a scraper plate (11) and circumferential teeth (9), wherein the sieve plate (12) is symmetrically arranged on both sides of the filter assembly (4), the circumferential teeth (9) are arranged in the middle of the two scrapers, the circumferential teeth (9) are fixed to the rotating shaft (14) via a fixed connecting plate (18), the circumferential teeth (9) are meshed with active teeth (10) provided on the upper part of the filter barrel (1), and the active teeth (10) are driven by a driving motor (8); the rotating shaft (14) passes through the sieve plate (12), and both ends of the rotating shaft (14) extend out of the side wall of the sieve plate (12), the scraper plate (11) is fixed to the extended end of the rotating shaft (14), and stainless steel wire bristles are provided on the side of the scraper plate (11) close to the sieve plate (12).

3. A submerged arc furnace flue gas waste heat recovery device according to claim 1, Features: A high-pressure nozzle (5) is provided on the top of the waste heat recovery box (2), and a water outlet of the high-pressure nozzle (5) is inclined toward the preheating component (3). The high-pressure nozzle (5) is connected to a high-pressure water pipe (6) provided on the outside of the waste heat recovery box (2), and the high-pressure water pipe (6) is connected to an external high-pressure water pump.

4. The device for recovering waste heat from flue gas of a submerged arc furnace according to claim 1, Features: The bottom of the waste heat recovery box (2) is provided with a drain outlet (7).

5. The submerged arc furnace flue gas waste heat recovery device according to claim 1, Features: The preheating component (3) is provided with a smoke guide duct (16), a smoke inlet (17) and a smoke outlet (19); a partition (20) is provided between the smoke inlet (17) and the smoke outlet (19); one end of the smoke guide duct (16) is connected to the smoke inlet (17), and the other end of the smoke guide duct (16) is connected to the smoke outlet (19).

6. The submerged arc furnace flue gas waste heat recovery device according to claim 1, Features: The bottom of the filter assembly (4) is provided with a material drop opening (13), and the material drop opening (13) is located directly below the scraper (11).

Images