Smelting furnace with flue gas waste heat recovery equipment

Abstract

The utility model relates to a smelting furnace with flue gas waste heat recovery equipment, which is applied to the field of smelting equipment in the aluminum industry, and realizes that when flue gas waste heat in a smelting furnace body is recovered into the waste heat recovery equipment, a sealing cover is opened firstly, and a drawer is inserted into the sealing cover and is put on an electrostatic generator to be contacted; at the moment, the electrostatic generator is started to generate static electricity to the drawer, the flue gas firstly enters the pretreatment box through the first connecting pipe before entering the waste heat recovery equipment, impurities in the flue gas are adsorbed in the drawer to be collected at the moment, and the filtered flue gas is reserved in the waste heat recovery equipment from the smoke outlet to be recovered; and when passing through the smoke outlet, the smoke is filtered again through the filter screen, so that the smoke is prevented from entering the pretreatment box to be adsorbed and flowing away from the smoke outlet in time, the waste heat recovery equipment performs pretreatment and filtration in the smoke recovery process in the smelting furnace body, impurities are prevented from being deposited on the heat exchange surface to form scale, and the smelting efficiency is improved. The heat exchange efficiency is reduced; and the pipeline is blocked.

Description

Technical Field

[0001] The utility model relates to a smelting furnace with a flue gas waste heat recovery device, and in particular to a smelting furnace with a flue gas waste heat recovery device used in the field of aluminum smelting equipment. Background Art

[0002] A smelting furnace with flue gas waste heat recovery equipment is usually a device that can effectively utilize the high-temperature flue gas waste heat generated during the smelting process, thereby improving energy utilization efficiency, reducing energy consumption, and reducing thermal pollution to the environment.

[0003] The specification of Chinese patent CN207963517U discloses a smelting furnace flue gas waste heat recovery and treatment device, including a motor, a conveyor belt, a rotating shaft, an air inlet pipe, a waste heat box, an air outlet pipe, a harmful gas treatment pool, an exhaust pipe and a cavity. The motor is installed at the left end of the conveyor belt, the conveyor belt is installed at the right end of the motor, and the rotating shaft is installed at the upper end of the support rod. The design realizes the timely transmission function of the material, the air inlet pipe is installed at the upper end of the waste heat box, the waste heat box is installed at the lower end of the air inlet pipe, and the air outlet pipe is installed at the lower end of the waste heat box. The design realizes the function of utilizing the waste gas for material waste heat, the harmful gas treatment pool is installed at the left end of the slaked lime pool, the exhaust pipe is installed at the upper end of the slaked lime pool, and the cavity is installed at the outer end of the harmful gas treatment pool. The design realizes the effective purification function of the waste gas. The utility model has a novel structure, simple assembly, convenient control, good waste heat and recovery performance, and strong practicality.

[0004] The specification of Chinese patent CN208333136U discloses a flue gas waste heat recovery and utilization system of a smelting furnace, including a smelting furnace, a waste heat boiler and an emission system, a first heating jacket is arranged at the bottom of the waste heat boiler, the flue gas outlet of the smelting furnace is connected to the inlet of the first heating jacket by a pipeline, the outlet of the first heating jacket is connected to the emission system by a pipeline, and also includes a sludge dryer, the sludge dryer includes a second heating jacket, a steam inlet and a condensed water outlet are provided on the second heating jacket, and the steam inlet of the second heating jacket is connected to the steam outlet of the waste heat boiler by a pipeline. The flue gas waste heat of the smelting furnace is utilized in sludge drying, which reduces the supplement of extra energy for sludge drying and realizes the joint utilization of heat of the smelting furnace and the dryer.

[0005] Impurities in the existing smelting furnace flue gas may be deposited on the surface of the waste heat recovery equipment during the waste heat recovery process, forming scale, resulting in reduced heat exchange efficiency and pipeline blockage. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is that impurities in the existing smelting furnace flue gas may be deposited on the heat exchange surface during the waste heat recovery process to form scale, resulting in reduced heat exchange efficiency and pipeline blockage.

[0007] In order to solve the above problems, the utility model provides a smelting furnace with flue gas waste heat recovery equipment, including a smelting furnace body, the bottom side end of the smelting furnace body is connected to a pretreatment box through a first connecting pipe, the pretreatment box is connected to the waste heat recovery equipment at one end away from the smelting furnace body through a second connecting pipe, a discharge port is opened at the bottom side end of the pretreatment box, a sealing cover is rotatably connected to the side of the discharge port, a sealing gasket is fixedly connected to one end of the sealing cover close to the discharge port, and the sealing gasket is engaged with the discharge port, a slide corresponding to the sealing cover is symmetrically fixedly connected to the inner wall of the pretreatment box, a drawer with a handle is slidably connected to the slide, and the projection of the handle in the vertical direction is located inside the discharge port, and an electrostatic generator is fixedly connected to the bottom of the pretreatment box directly below the drawer.

[0008] In the above-mentioned flue gas filtering device, the waste heat recovery equipment performs pre-treatment filtering effect on the flue gas recovery process in the smelting furnace body to prevent impurities from being deposited on the surface of the waste heat recovery equipment to form scale, resulting in reduced heat exchange efficiency and pipeline blockage.

[0009] As a further improvement of the present application, a smoke exhaust port is formed on the side wall of the pretreatment box above the drawer, and a filter is fixedly connected to the smoke exhaust port.

[0010] As a further improvement of the present application, an annular groove is bored on the pretreatment box located at the outer circle of the smoke exhaust port, an electric annular guide rail is fixedly connected in the annular groove, a cleaning brush is slidably connected in the electric annular guide rail, and the cleaning brush is in conflict with the filter.

[0011] As a further improvement of the present application, snap-in openings are symmetrically provided on the slideway, and sliding blocks corresponding to the snap-in openings are symmetrically fixedly connected to the bottom end of the drawer, and the snap-in openings are engaged with the sliding blocks.

[0012] As another improvement of the present application, an electric push rod corresponding to the bayonet is fixedly connected to the inner wall of the pretreatment box directly below the bayonet, and the sliding block contacts the electric push rod when the sliding block is engaged with the bayonet.

[0013] As another improved supplement of the present application, an output end is installed at the top of the electrostatic generator, and the output end is in contact with the bottom of the drawer.

[0014] As another improved supplement of the present application, a gravity sensor is installed in the middle of the top of the electrostatic generator, and a controller gravity sensor and a controller of the electric push rod are fixedly connected to the pretreatment box.

[0015] In summary, this solution can be achieved: when the waste heat of the flue gas in the smelting furnace body is recovered to the waste heat recovery equipment, first open the sealing cover and insert the drawer into the sealing cover and put it in contact with the electrostatic generator. At this time, the electrostatic generator is turned on to generate static electricity on the drawer. At this time, the flue gas enters the pretreatment box through the first connecting pipe before entering the waste heat recovery equipment. At this time, the impurities in the flue gas are adsorbed and collected in the drawer. The filtered flue gas is then retained from the exhaust port to the waste heat recovery equipment for recovery, and is filtered again through the filter when passing through the exhaust port to avoid the flue gas entering the pretreatment box and being adsorbed in time and flowing out of the exhaust port, and the filter will be blocked during long-term use. At this time, the electric annular guide rail can be turned on by the controller to drive the cleaning brush to rotate, clean the impurities on the filter and drop them into the drawer, thereby achieving the effect of pre-treatment filtration of the waste heat recovery equipment in the process of recovering the flue gas in the smelting furnace body, avoiding impurities from being deposited on the surface of the waste heat recovery equipment to form scale, resulting in reduced heat exchange efficiency and pipeline blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an axonometric diagram of a smelting furnace fume recovery device according to a first embodiment of the present application;

[0017] Figure 2 This is a diagram showing the internal structure of a pretreatment box according to the first embodiment of the present application;

[0018] Figure 3 This is a partial installation diagram of a drawer according to the second embodiment of the present application;

[0019] Figure 4 This is a diagram of the installation structure of the pre-treatment box and the drawer according to the second embodiment of the present application;

[0020] Figure 5 For this application Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is an axonometric diagram of a pretreatment box according to a first embodiment of the present application;

[0022] Figure 7 This is a diagram of the filter installation structure of the first embodiment of the present application.

[0023] Description of the numbers in the figure:

[0024] 1. Melting furnace body; 2. Pretreatment box; 3. First connecting pipe; 4. Second connecting pipe; 5. Waste heat recovery equipment; 6. Sealing cover; 7. Filter; 8. Drawer; 9. Slide; 10. Handle; 11. Electric push rod; 12. Sliding block; 13. Electrostatic generator; 14. Bayonet; 15. Smoke exhaust port; 16. Gravity sensor; 17. Electric circular guide rail; 18. Discharge port; 19. Cleaning brush. DETAILED DESCRIPTION

[0025] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0026] The first implementation method:

[0027] Figure 1-2 and Figure 6-7 A smelting furnace with flue gas waste heat recovery equipment is shown, comprising a smelting furnace body 1, a pretreatment box 2 is connected to the bottom side end of the smelting furnace body 1 through a first connecting pipe 3, and the pretreatment box 2 is connected to the waste heat recovery equipment 5 through a second connecting pipe 4 at one end away from the smelting furnace body 1, a discharge port 18 is opened at the bottom side end of the pretreatment box 2, a sealing cover 6 is rotatably connected to the side of the discharge port 18, a sealing gasket is fixedly connected to the end of the sealing cover 6 close to the discharge port 18, and the sealing gasket is engaged with the discharge port 18, and a slideway 9 corresponding to the sealing cover 6 is symmetrically fixedly connected to the inner wall of the pretreatment box 2, and the slideway 9 is symmetrically fixedly connected to the inner wall of the pretreatment box 2. A drawer 8 with a handle 10 is slidably connected on the road 9, and the projection of the handle 10 in the vertical direction is located inside the discharge port 18, an electrostatic generator 13 is fixedly connected to the bottom of the pretreatment box 2 located just below the drawer 8, a smoke exhaust port 15 is drilled on the side wall of the pretreatment box 2 located above the drawer 8, a filter 7 is fixedly connected to the smoke exhaust port 15, an annular groove is drilled on the pretreatment box 2 located at the outer circle of the smoke exhaust port 15, an electric annular guide rail 17 is fixedly connected in the annular groove, a cleaning brush 19 is slidably connected in the electric annular guide rail 17, and the cleaning brush 19 conflicts with the filter 7.

[0028] This solution can be achieved as follows: when the waste heat of the flue gas in the smelting furnace body 1 is recovered into the waste heat recovery device 5, the sealing cover 6 is first opened to insert the drawer 8 into the sealing cover 6 and put it in contact with the electrostatic generator 13. At this time, the electrostatic generator 13 is turned on to generate static electricity on the drawer 8. At this time, before the flue gas enters the waste heat recovery device 5, it first enters the pretreatment box 2 through the first connecting pipe 3. At this time, the impurities in the flue gas are adsorbed and collected in the drawer 8. The filtered flue gas is then retained in the waste heat recovery device 5 from the exhaust port 15 for recovery, and is filtered again through the filter screen 7 when passing through the exhaust port 15 to prevent the flue gas from entering the pretreatment box 2. If the adsorbed gas in the processing box 2 is not discharged from the smoke exhaust port 15 in time, and the filter screen 7 will be blocked during long-term use, the electric annular guide rail 17 can be turned on by the controller to drive the cleaning brush 19 to rotate, so that the impurities on the filter screen 7 are cleaned and fall into the drawer 8, and the connection pipe joints between the pretreatment box 2 and the smelting furnace body 1 and the waste heat recovery equipment 5 are sealed with insulation materials, so as to achieve the effect of pre-treatment filtration of the waste heat recovery equipment 5 in the process of flue gas recovery in the smelting furnace body 1, and avoid impurities from being deposited on the surface of the waste heat recovery equipment 5 to form scale, resulting in reduced heat exchange efficiency and pipeline blockage.

[0029] The second implementation method:

[0030] Figure 3-5It is shown that the slide 9 is symmetrically provided with bayonet holes 14, the bottom end of the drawer 8 is symmetrically fixedly connected with a slider 12 corresponding to the bayonet hole 14, and the bayonet hole 14 is engaged with the slider 12, the inner wall of the pretreatment box 2 located directly below the bayonet hole 14 is fixedly connected with an electric push rod 11 corresponding to the bayonet hole 14, and the slider 12 conflicts with the electric push rod 11 when engaging with the bayonet hole 14, the top of the electrostatic generator 13 is equipped with an output end, and the output end is in contact with the bottom end of the drawer 8, a gravity sensor 16 is installed in the middle of the top end of the electrostatic generator 13, and the pretreatment box 2 is fixedly connected with a controller gravity sensor 16 and a controller of the electric push rod 11.

[0031] This solution can achieve the following: placing the drawer 8 into the discharge port 18, so that the slider 12 can be slid into the pretreatment box 2 after being engaged with the slide 9. When the drawer 8 is placed, the slider 12 overlaps with the electric push rod 11 in the bayonet 14, and then the controller is used to turn on the electric push rod 11 to drive the slider 12 and the entire drawer 8 to move downward. When the bottom of the drawer 8 contacts the electrostatic generator 13, the gravity sensor 16 automatically turns on the electrostatic generator 13 to generate static electricity for the drawer 8. When the smelting furnace body 1 and the waste heat recovery device 5 are not in use, the electric push rod 11 can be turned on again to push the slider 12 to the top of the bayonet 14 and parallel to the slide 9, and then the handle 10 is pulled to take the drawer 8 out of the pretreatment box 2, and the electrostatic generator 13 will be automatically turned off at the moment the drawer 8 is separated from the electrostatic generator 13, which can save energy.

[0032] In view of current practical needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A smelting furnace with a flue gas waste heat recovery device, comprising a smelting furnace body (1), characterized in that: The bottom side end of the smelting furnace body (1) is connected to a pretreatment box (2) through a first connecting pipe (3); the end of the pretreatment box (2) away from the smelting furnace body (1) is connected to a waste heat recovery device (5) through a second connecting pipe (4); a discharge port (18) is cut at the bottom side end of the pretreatment box (2); a sealing cover (6) is rotatably connected to the side of the discharge port (18); a sealing gasket is fixedly connected to one end of the sealing cover (6) close to the discharge port (18), and the sealing gasket is engaged with the discharge port (18); a slideway (9) corresponding to the sealing cover (6) is symmetrically fixedly connected to the inner wall of the pretreatment box (2); a drawer (8) with a handle (10) is slidably connected to the slideway (9), and the projection of the handle (10) in the vertical direction is located inside the discharge port (18); and an electrostatic generator (13) is fixedly connected to the bottom of the pretreatment box (2) located directly below the drawer (8).

2. The smelting furnace with flue gas waste heat recovery equipment according to claim 1, characterized in that: A smoke exhaust port (15) is cut into the side wall of the pretreatment box (2) located above the drawer (8), and a filter screen (7) is fixedly connected to the smoke exhaust port (15).

3. The smelting furnace with flue gas waste heat recovery equipment according to claim 2, characterized in that: An annular groove is bored on the pretreatment box (2) located at the outer circle of the smoke exhaust port (15), an electric annular guide rail (17) is fixedly connected in the annular groove, a cleaning brush (19) is slidably connected in the electric annular guide rail (17), and the cleaning brush (19) is in conflict with the filter screen (7).

4. The smelting furnace with flue gas waste heat recovery equipment according to claim 1, characterized in that: The slideway (9) is symmetrically provided with snap-on openings (14), and a sliding block (12) corresponding to the snap-on openings (14) is symmetrically fixedly connected to the bottom end of the drawer (8), and the snap-on openings (14) are snap-fitted with the sliding block (12).

5. The smelting furnace with flue gas waste heat recovery equipment according to claim 4, characterized in that: An electric push rod (11) corresponding to the bayonet (14) is fixedly connected to the inner wall of the pretreatment box (2) located directly below the bayonet (14), and the sliding block (12) abuts against the electric push rod (11) when the sliding block (12) is engaged with the bayonet (14).

6. The smelting furnace with flue gas waste heat recovery equipment according to claim 1, characterized in that: An output end is installed at the top end of the electrostatic generator (13), and the output end is in contact with the bottom end of the drawer (8).

7. The smelting furnace with flue gas waste heat recovery equipment according to claim 5, characterized in that: A gravity sensor (16) is installed at the middle of the top end of the electrostatic generator (13), and a controller gravity sensor (16) and a controller of the electric push rod (11) are fixedly connected to the pretreatment box (2).

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