Industrial smelting furnace flue gas waste heat recovery heat exchange device

Abstract

The utility model relates to industrial smelting technical field discloses industrial smelting furnace flue gas waste heat recovery heat exchange device, including heat exchanger body, the side of heat exchanger body is connected with the air outlet pipe through and through, and the other side of heat exchanger body is provided with filter assembly, filter assembly includes rotary pipe, and rotary pipe rotatoryly connects in the other side of heat exchanger body, and one end of rotary pipe rotatoryly connects with the air inlet pipe, and one side fixedly connected with the connecting block of air inlet pipe, and the inside fixedly connected with the filter screen of rotary pipe. The utility model discloses filter screen can intercept the dust impurity at the air inlet of air inlet pipe, reduces its into the heat exchanger, when filter screen autorotation, the gas that air outlet spouts backblows filter screen, and the one side of filter screen adhered impurity is scraped conveniently by triangular scraper lever to scrape off impurity, reduces filter screen blockage influence air inlet, and the impurity that pushes frame moves down can push the triangular scraper lever and adhere to make it discharge through the discharge port, thereby maintaining the scraping dirt effect of scraper lever.

Description

Technical Field

[0001] This utility model relates to the field of industrial smelting technology, and in particular to a waste heat recovery and heat exchange device for flue gas from industrial smelting furnaces. Background Technology

[0002] Industrial smelting furnaces are equipment used in industrial production to heat ores, metals, or chemical raw materials through fuel combustion or electrical energy conversion for melting, reduction, refining, and other thermal processing. Smelting furnace flue gas is a mixture of gases and dust generated during fuel combustion or material reaction. Recovering waste heat from smelting furnace flue gas has significant energy-saving, environmental protection, and economic value.

[0003] A search revealed Chinese patent CN218864848U, which discloses a waste heat recovery heat exchange device. This device addresses the issue that while people typically utilize some of the heat energy, a significant amount of waste heat is still emitted due to low heat exchange efficiency, preventing effective recovery and reuse, thus wasting heat energy. Furthermore, the flue gas contains a large amount of dust, impurities, and particulate matter, which adhere to the heat pipes or water pipes during heat exchange, leading to a decrease in heat conversion efficiency over time. In addition, the directly emitted flue gas contains soot and harmful substances, causing environmental pollution. Therefore, this device not only effectively recovers and reuses heat energy but also allows for regular cleaning of the heat pipes to prevent dust, impurities, and particulate matter from accumulating over time. The overall heat conversion efficiency is high, and the device also filters the emitted flue gas, preventing environmental pollution.

[0004] The aforementioned device is only convenient for filtering the flue gas at the flue gas outlet. Since the flue gas from the smelting furnace contains a large amount of dust, such as iron oxide scale and unburned particles, if the flue gas is not filtered and directly enters the heat exchanger through the inlet pipe, it is easy to deposit on the surface of the heat exchange tube, resulting in a reduction in the flow cross section and an increase in resistance. It also causes a thick layer of impurities to adhere to the outer wall of the heat exchange pipe. Dust particles may wear down the surface of the heat exchange tube, shorten the equipment life, and significantly affect the heat exchange efficiency. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an industrial smelting furnace flue gas waste heat recovery and heat exchange device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an industrial smelting furnace flue gas waste heat recovery heat exchange device, including a heat exchanger body, an outlet pipe being connected through one side of the heat exchanger body, and a filter assembly being provided on the other side of the heat exchanger body. The filter assembly includes a rotating tube rotatably connected to the other side of the heat exchanger body. One end of the rotating tube is rotatably connected to an air inlet pipe, and a connecting block is fixedly connected to one side of the air inlet pipe. A filter screen is fixedly connected inside the rotating tube.

[0007] As a further description of the above technical solution: The connecting block is fixedly connected to the other side of the heat exchanger body. An external gear ring is fixedly connected to the outer wall of the rotating tube. A variable speed motor is fixedly installed on the other side of the heat exchanger body. A gear is fixedly connected to the output end of the variable speed motor. The gear and the external gear ring are meshed.

[0008] As a further description of the above technical solution: An air pump is fixedly installed on the upper surface of the heat exchanger body. The output end of the air pump is fixedly connected to a vent pipe, and multiple air outlets are connected through one side of the vent pipe.

[0009] As a further description of the above technical solution: A triangular scraper is fixedly connected to the inner wall of the air intake pipe, and two through holes are opened on the upper surface of the air intake pipe, with a sealing ring installed inside the through holes.

[0010] As a further description of the above technical solution: A U-shaped frame runs through the interior of the two sealing rings. A push frame is fixedly connected to one end of the U-shaped frame. The push frame is slidably connected to the outside of the triangular scraper. A limit frame is fixedly connected to the top of the other side of the heat exchanger body.

[0011] As a further description of the above technical solution: One side of the limiting frame is threaded with a bolt, and the lower surface of the air inlet pipe is provided with a discharge port. One side of the discharge port is hinged with an opening and closing door.

[0012] As a further description of the above technical solution: A sealing strip is provided on the outer wall of the discharge port, and a fixing block is fixedly connected to one side of the air inlet pipe. Two bolts are threadedly connected to one side of the fixing block.

[0013] This utility model has the following beneficial effects: This invention utilizes a filter assembly to effectively intercept dust and impurities entering through the air inlet of the inlet pipe. This helps reduce the amount of dust and impurities entering the heat exchanger, preventing them from adhering to the outer wall of the heat exchange tubes and reducing heat exchange efficiency. The filter has an air outlet on one side and a triangular scraper on the other. As the filter rotates, it is back-blown by the gas ejected from the outlet, while the triangular scraper scrapes off the side of the filter with adhering impurities. This helps reduce the likelihood of impurities adhering to the filter and causing blockages that could affect air intake. Furthermore, the downward movement of the push frame further pushes the impurities adhered to the triangular scraper downwards, allowing them to be discharged through the discharge port. This reduces the adhesion of impurities to the scraper, maintains its scraping effect, and eliminates the need to separate the air inlet pipe from the external pipes, thus improving the convenience of cleaning the filter. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a schematic diagram of the ventilation pipe structure proposed in this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the rotating tube proposed in this utility model; Figure 4 This is a schematic diagram of the intake pipe structure proposed in this utility model; Figure 5 This is a schematic diagram of the triangular scraper structure proposed in this utility model; Figure 6 This is a schematic diagram of the U-shaped frame structure proposed in this utility model; Figure 7 This is a schematic diagram of the push-frame structure proposed in this utility model; Figure 8 This is a schematic diagram of the limiting frame structure proposed in this utility model.

[0015] Legend: 1. Heat exchanger body; 2. Outlet pipe; 3. Rotating pipe; 4. Inlet pipe; 5. Connecting block; 6. Filter screen; 7. External gear ring; 8. Variable speed motor; 9. Gear; 10. Air pump; 11. Vent pipe; 12. Outlet nozzle; 13. Triangular scraper; 14. Sealing ring; 15. U-shaped frame; 16. Push frame; 17. Limiting frame; 18. Bolt 1; 19. Discharge port; 20. Sealing strip; 21. Opening and closing door; 22. Fixing block; 23. Bolt 2. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] As attached Figure 1-8 As shown, one embodiment of the present invention is provided: an industrial smelting furnace flue gas waste heat recovery heat exchange device, including a heat exchanger body 1, and one side of the heat exchanger body 1 is provided with a water inlet pipe and a water outlet pipe, one side of the heat exchanger body 1 is connected to an air outlet pipe 2, and the other side of the heat exchanger body 1 is provided with a filter assembly. The filter assembly includes a rotatable rotating tube 3, and the rotatable connection between the rotating tube 3 and the heat exchanger body 1 and the air inlet pipe 4 is in a sealed rotating state as in the prior art. The rotating tube 3 is rotatably connected to the other side of the heat exchanger body 1, and one end of the rotating tube 3 is rotatably connected to the air inlet pipe 4. A connecting block 5 is fixedly connected to one side of the air inlet pipe 4, and the connecting block 5 is fixedly connected to one side of the heat exchanger body 1, thereby limiting and fixing the air inlet pipe 4. A filter screen 6 for filtration is fixedly connected inside the rotating tube 3.

[0018] As attached Figure 1 As shown, the connecting block 5 is fixedly connected to the other side of the heat exchanger body 1, the outer wall of the rotating tube 3 is fixedly connected to the external gear ring 7, the other side of the heat exchanger body 1 is fixedly installed with the variable speed motor 8, the output end of the variable speed motor 8 is fixedly connected to the gear 9, the gear 9 and the external gear ring 7 are meshed, so that when the gear 9 rotates, it can drive the external gear ring 7 and thus drive the rotating tube 3 to rotate. The upper surface of the heat exchanger body 1 is fixedly installed with the gas pump 10 for outputting gas.

[0019] As attached Figure 2 As shown, the output end of the air pump 10 is fixedly connected to an air pipe 11, and multiple air nozzles 12 for spraying gas are connected through the air pipe 11 on the side near the straight tube of the filter screen 6.

[0020] As attached Figure 5 As shown, a triangular scraper 13 with a triangular cross-section is fixedly connected to the inner wall of the air intake pipe 4. Two through holes are opened on the upper surface of the air intake pipe 4 for the U-shaped frame 15 to pass through. A sealing ring 14 for sealing is provided inside the through hole.

[0021] As attached Figure 6 As shown, a U-shaped frame 15 that pushes and pulls the push frame 16 runs through the inside of the two sealing rings 14. One end of the U-shaped frame 15 is fixedly connected to the push frame 16 that pushes away impurities from the outside of the triangular scraper 13. The push frame 16 is slidably connected to the outside of the triangular scraper 13.

[0022] As attached Figure 2 As shown, a limiting bracket 17 is fixedly connected to the top of the other side of the heat exchanger body 1. The limiting bracket 17 is composed of a long rectangular block and a U-shaped frame. A screw hole for bolt 18 to be installed is provided on one side of the U-shaped frame. A bolt 18 for limiting the U-shaped frame 15 is threadedly connected to one side of the limiting bracket 17.

[0023] As attached Figure 4 As shown, the lower surface of the air inlet pipe 4 is provided with a discharge port 19 for discharging impurities, and the outer wall of the discharge port 19 is provided with a sealing strip 20 for easy sealing.

[0024] As attached Figure 2 As shown, a hinged opening and closing door 21 for sealing the discharge port 19 is connected to one side, and the edge of the opening and closing door 21 has a sealing gasket. A fixing block 22 with a screw hole for mounting bolt 23 is fixedly connected to one side of the air inlet pipe 4. A bolt 23 for limiting and locking the opening and closing door 21 is threadedly connected to one side of the fixing block 22.

[0025] Working principle: When in use, the air inlet pipe 4 is connected to the external smelting furnace flue gas pipe, and the heat exchanger body 1 is equipped with an inlet water pipe and an outlet water pipe for water to flow through. After the external water pipe is connected to the inlet water pipe and the outlet water pipe respectively, the flue gas enters through the air inlet pipe 4 and is filtered by the filter screen 6, which heats the internal heat exchange pipe, and then is discharged through the air outlet pipe 2. At this time, the water flows in the inlet water pipe, the outlet water pipe and the heat exchange pipe. When the heat exchange work is over and there are a lot of impurities on one side of the filter screen 6 that need to be cleaned, the device is stopped. The variable speed motor 8 and air pump 10 are turned on by an external controller. The output of the variable speed motor 8 drives the gear 9 to rotate. Under the meshing of the gear 9 and the external gear ring 7, the external gear ring 7 will rotate, which will drive the rotating tube 3 to rotate. The rotating tube 3 will drive the internal filter screen 6 to rotate. At this time, the gas generated by the air pump 10 is output to the straight tube on one side of the filter screen 6 through the air pipe 11, and then sprayed out through multiple air outlets 12. The gas will back-blow the rotating filter screen 6, thereby blowing away the impurities adhering to the other side of the filter screen 6. When the filter screen 6 rotates, it will pass by the triangular scraper 13 and be scraped by the triangular scraper 13, which will scrape off the impurities. When some impurities adhere to the triangular scraper 13, loosen bolt 18 to release the U-shaped frame 15 from its limit, and then press down on the U-shaped frame 15, causing the push frame 16 to slide down outside the triangular scraper 13, pushing off the impurities adhering to the outside of the triangular scraper 13. At this time, the impurities fall to the bottom of the inner wall of the air intake pipe 4 and the opening and closing door 21. Loosen bolt 23, hold the handle of the opening and closing door 21 and open the opening and closing door 21 to clean the impurities that have fallen to the inner wall of the air intake pipe 4 and the inner wall of the opening and closing door 21.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery heat exchange device for industrial smelting furnace flue gas, comprising a heat exchanger body (1), characterized in that: An outlet pipe (2) is connected through one side of the heat exchanger body (1), and a filter assembly is provided on the other side of the heat exchanger body (1). The filter assembly includes a rotating tube (3), which is rotatably connected to the other side of the heat exchanger body (1). One end of the rotating tube (3) is rotatably connected to an air inlet pipe (4), and a connecting block (5) is fixedly connected to one side of the air inlet pipe (4). A filter screen (6) is fixedly connected inside the rotating tube (3).

2. The industrial smelting furnace flue gas waste heat recovery heat exchanger according to claim 1, characterized in that: The connecting block (5) is fixedly connected to the other side of the heat exchanger body (1). An external gear ring (7) is fixedly connected to the outer wall of the rotating tube (3). A variable speed motor (8) is fixedly installed on the other side of the heat exchanger body (1). A gear (9) is fixedly connected to the output end of the variable speed motor (8). The gear (9) and the external gear ring (7) are meshed.

3. The industrial smelting furnace flue gas waste heat recovery heat exchanger according to claim 1, characterized in that: An air pump (10) is fixedly installed on the upper surface of the heat exchanger body (1). An air pipe (11) is fixedly connected to the output end of the air pump (10). Multiple air outlets (12) are connected through one side of the air pipe (11).

4. The industrial smelting furnace flue gas waste heat recovery heat exchanger according to claim 1, characterized in that: The inner wall of the air intake pipe (4) is fixedly connected with a triangular scraper (13), and two through holes are opened on the upper surface of the air intake pipe (4), and a sealing ring (14) is provided inside the through hole.

5. The industrial smelting furnace flue gas waste heat recovery heat exchanger according to claim 4, characterized in that: A U-shaped frame (15) runs through the interior of the two sealing rings (14). A push frame (16) is fixedly connected to one end of the U-shaped frame (15). The push frame (16) is slidably connected to the outside of the triangular scraper (13). A limit frame (17) is fixedly connected to the top of the other side of the heat exchanger body (1).

6. The industrial smelting furnace flue gas waste heat recovery heat exchanger according to claim 5, characterized in that: The limiting frame (17) is threaded with a bolt (18) on one side, and the lower surface of the air inlet pipe (4) is provided with a discharge port (19), and a hinged door (21) is connected to one side of the discharge port (19).

7. The industrial smelting furnace flue gas waste heat recovery heat exchanger according to claim 6, characterized in that: The outer wall of the discharge port (19) is provided with a sealing strip (20), and a fixing block (22) is fixedly connected to one side of the air inlet pipe (4), and a bolt (23) is threadedly connected to one side of the fixing block (22).

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