A set of energy-saving and environment-friendly tower system applied to the flue gas system of an aluminum melting furnace

Abstract

The present application relates to the technical field of flue gas environmental protection treatment, in particular to a set of energy-saving and environment-friendly tower system applied to a flue gas system of an aluminum melting furnace, comprising an environment-friendly tower body, a flue gas inlet pipe is fixedly and communicatively connected to the bottom of one side of the outer wall of the environment-friendly tower body, a flue gas spraying pipe is fixedly and communicatively connected to the inner wall of the environment-friendly tower body and at a position corresponding to the flue gas inlet pipe, a purification assembly for purifying high-temperature flue gas is arranged inside the environment-friendly tower body, the flue gas generated by the aluminum melting furnace is first conveyed into the environment-friendly tower body through the flue gas inlet pipe and the flue gas spraying pipe, then the flue gas is subjected to three-stage spraying purification through the cooperation of the first spraying device, the second spraying device and the third spraying device, so that the nitrogen oxides and sulfur dioxide in the flue gas can be effectively removed, the dust content in the flue gas is reduced, at the same time, the latent heat of water vaporization in the flue gas can be taken out by spraying water into the flue gas, and the taken-out hot water is introduced into a heat pump unit through a backflow pump for energy-saving recovery and used for industrial production.

Description

Technical Field

[0001] This invention relates to the field of flue gas environmental protection treatment technology, specifically to an energy-saving and environmental protection tower system applied to the flue gas system of an aluminum melting furnace. Background Technology

[0002] The aluminum melting furnace is a new type of high-efficiency and energy-saving furnace developed based on the aluminum smelting process. It can well meet the requirements of the aluminum smelting process, such as strict requirements for alloy composition, discontinuous production, and large single furnace capacity. It achieves the effects of reducing consumption, reducing burn-off, improving product quality, reducing labor intensity, improving working conditions, and increasing production efficiency. It is suitable for intermittent operation and smelting with a lot of alloys and recycled materials. However, the flue gas discharged from the aluminum melting furnace contains too many impurities, so it is necessary to treat the flue gas discharged from the aluminum melting furnace. The current flue gas treatment system of aluminum melting furnace is an induced draft fan + dust collector + chimney. The flue gas discharged from the aluminum melting furnace is transported to the dust collector by the induced draft fan, and then the dust collector removes the particulate impurities in the flue gas before it is discharged from the chimney. However, in specific industrial production, the amount of dust, nitrogen oxides, and sulfur dioxide often exceed the standard for a short time due to the pouring of materials in the furnace, abnormal combustion, and slag frying by the slag frying machine. Relying solely on the dust collector is no longer sufficient to remove the above-mentioned harmful substances, and the heat contained in the flue gas is also wasted.

[0003] In conclusion, it is necessary to invent an energy-saving and environmentally friendly tower system for use in aluminum melting furnace flue gas systems. Summary of the Invention

[0004] Therefore, this invention provides an energy-saving and environmentally friendly tower system for use in aluminum melting furnace flue gas systems. This system addresses the problem that in actual industrial production, dust, nitrogen oxides, and sulfur dioxide levels often exceed standards for a short period due to in-furnace material discharge, abnormal combustion, and slag stir-frying by slag scrapers. Dust collectors alone are no longer sufficient to remove these harmful substances, and the heat contained in the flue gas is also wasted.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving and environmentally friendly tower system applied to the flue gas system of an aluminum melting furnace, comprising an environmental protection tower body, wherein a flue gas inlet pipe is fixedly connected to the bottom of one side of the outer wall of the environmental protection tower body, and a flue gas spray pipe is fixedly connected to the inner wall of the environmental protection tower body at a position corresponding to the flue gas inlet pipe. A purification component for purifying high-temperature flue gas is provided inside the environmental protection tower body, and a heat recovery component is provided on one side of the outer wall of the environmental protection tower body.

[0006] Preferably, the purification component includes a second spray device, a first spray device, and a third spray device. The first spray device is disposed on the inner wall of the environmental protection tower and located above the smoke spray pipe. The second spray device is disposed above the first spray device, and the third spray device is disposed above the second spray device. A smoke exhaust pipe is fixedly connected to the top of the inner wall of the environmental protection tower.

[0007] Preferably, the first spraying device includes a front mounting plate b and a rear mounting plate b. The two ends of the front mounting plate b are respectively fixed to the front ends of the inner walls on both sides of the environmental protection tower body, and the two ends of the rear mounting plate b are respectively fixed to the rear ends of the inner walls on both sides of the environmental protection tower body. A spray pipe b is slidably arranged between the two mounting plates b. An atomizing nozzle b is fixedly connected to the outer wall of the spray pipe b. The multiple atomizing nozzles b are evenly arranged in a ring array.

[0008] Preferably, the front end of the outer wall of the spray pipe b is rotatably connected to a connecting pipe, and two fixing plates are fixed on the front mounting plate b. A screw is rotatably connected between the two fixing plates, and a drive motor is fixed on the side of the fixing plate away from the screw. The output end of the drive motor is fixed to one end of the screw.

[0009] Preferably, the outer wall of the screw is threaded with a threaded slider, the front end of the connecting pipe passes through the front mounting plate b and is fixedly connected to the threaded slider, the front mounting plate b is provided with a first strip groove for the sliding of the connecting pipe, the rear mounting plate b is provided with a second strip groove, the bottom end of the inner wall of the second strip groove is fixed with a rack, and the rear end of the spray pipe b is fixed with a gear through a rotating shaft, the gear meshing with the rack.

[0010] Preferably, the second spraying device includes two mounting plates a, which are fixed to the upper front and upper rear sides of the inner walls on both sides of the environmental protection tower, respectively. Multiple spray pipes a are rotatably connected between the two mounting plates a. Atomizing nozzles a are fixedly connected to the bottom of the outer wall of each spray pipe a, and a water inlet branch pipe a is fixedly connected to the center of the top of the outer wall of the spray pipe a.

[0011] Preferably, two adjacent spray pipes a are connected by a connecting rod, and an electric cylinder is fixed on the left side of the outer wall of the environmental protection tower body at a position corresponding to the spray pipe a. The output end of the electric cylinder is hinged to one side of the outer wall of the leftmost spray pipe a.

[0012] Preferably, the third spraying device includes a hollow base, a conical base is fixed to the bottom of the outer wall of the hollow base, the outer wall of the hollow base is fixed to the inner wall of the environmental protection tower, and a through groove is provided on the outer wall of the conical base.

[0013] Preferably, a liquid storage tray is fixed to the inner wall of the hollow seat, and an atomizing nozzle c is fixedly connected to the bottom of the outer wall of the liquid storage tray. The multiple atomizing nozzles c are arranged in a ring array.

[0014] Preferably, the heat recovery assembly includes a reflux pump, the inlet end of which is fixedly connected to a heat pump unit, the bottom end of which is fixedly connected to the bottom right side of the inner wall of the environmental protection tower, the outlet end of which is fixedly connected to a water inlet pipe, the top of the outer wall of the connecting pipe being connected to the water inlet pipe via a water inlet branch pipe b, the end of the water inlet branch pipe a furthest from the spray pipe a being connected to the water inlet pipe, and one side of the inner wall of the hollow seat being connected to the water inlet pipe via a water inlet branch pipe c.

[0015] The beneficial effects of this invention are:

[0016] In this invention, the flue gas generated by the aluminum melting furnace is first transported to the environmental protection tower through the flue gas inlet pipe and the flue gas spray pipe. Then, the flue gas is purified by three spraying devices through the combined action of the first, second and third spraying devices. This effectively removes nitrogen oxides and sulfur dioxide from the flue gas and reduces the dust content. At the same time, by spraying water into the flue gas, the water in the flue gas is vaporized into latent heat and discharged. The discharged hot water is then introduced into the heat pump unit through the return pump for energy-saving recovery and use in industrial production, thus achieving energy-saving and environmental protection effects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention viewed from the front.

[0018] Figure 2 This is a partial structural schematic diagram of the second spraying device in the present invention from a side view.

[0019] Figure 3 This is a three-dimensional structural diagram of spray pipe a in this invention;

[0020] Figure 4 This is a partial cross-sectional view of the first spraying device in this invention from a top view perspective;

[0021] Figure 5 This is a partial cross-sectional view of the third spraying device in the present invention from a formal direction;

[0022] Figure 6 This is a three-dimensional structural diagram of the third spraying device in this invention.

[0023] In the diagram: 100, Environmental protection tower body; 110, Smoke inlet pipe; 120, Smoke spray pipe; 130, Smoke exhaust pipe; 200, Second spray device; 210, Mounting plate a; 220, Spray pipe a; 221, Atomizing nozzle a; 230, Water inlet branch pipe a; 240, Electric cylinder; 300, First spray device; 310, Drive motor; 311, Screw; 312, Threaded slider; 320, Spray pipe b; 321, Atomizing nozzle b; 322, Connecting pipe; 323, Gear; 330, Rack; 400, Third spray device; 410, Hollow seat; 420, Conical base; 430, Liquid storage pan; 500, Return pump; 510, Heat pump unit; 520, Water inlet pipe. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] See attached document Figure 1-6This invention provides an energy-saving and environmentally friendly tower system for use in aluminum melting furnace flue gas systems. The system includes an environmental protection tower body 100. A flue gas inlet pipe 110 is fixedly connected to the bottom of one side of the outer wall of the tower body 100. A smoke spray pipe 120 is fixedly connected to the inner wall of the tower body 100 at a position corresponding to the flue gas inlet pipe 110. The flue gas inlet pipe 110 and the smoke spray pipe 120 are used to transport flue gas into the environmental protection tower body 100. The interior of the environmental protection tower body 100 is equipped with a purification component for purifying high-temperature flue gas. The purification component includes a second spray device 200, a first spray device 300, and a third spray device 400. The first spray device 300 is located on the inner wall of the tower body 100 and above the smoke spray pipe 120. The first spray device 300 includes a front... The front mounting plate b and the rear mounting plate b are respectively fixed at both ends to the front ends of the inner walls of both sides of the environmental protection tower body 100, and respectively fixed at both ends of the rear mounting plate b to the rear ends of the inner walls of both sides of the environmental protection tower body 100. A spray pipe b320 is slidably arranged between the two mounting plates b. An atomizing nozzle b321 is fixedly connected to the outer wall of the spray pipe b320. Multiple atomizing nozzles b321 are evenly arranged in a ring array. After the spray pipe b320 stores spray water, it can atomize the water through the atomizing nozzles b321 and spray it out to combine with the flue gas. A connecting pipe 322 is rotatably connected to the front end of the outer wall of the spray pipe b320. The connecting pipe 322 is used to transport water into the spray pipe b320. A fixed part is fixed on the front mounting plate b. Two fixed plates are rotatably connected by a screw 311. A drive motor 310 is fixed to the side of the fixed plate away from the screw 311. The output end of the drive motor 310 is fixed to one end of the screw 311. The drive motor 310 can drive the screw 311 to rotate in both directions through its output end. A threaded slider 312 is threadedly connected to the outer wall of the screw 311. The front end of the connecting pipe 322 passes through the front mounting plate b and is fixedly connected to the threaded slider 312. The front mounting plate b has a first strip groove for the sliding of the connecting pipe 322, allowing the connecting pipe 322 to slide on the mounting plate b. When the screw 311 rotates, it drives the threaded slider 312 to move through the engagement of the threaded connection. 2. During movement, the spray pipe b320 can be moved by the connecting pipe 322. The rear mounting plate b has a second slot, and a rack 330 is fixed at the bottom of the inner wall of the second slot. The rear end of the spray pipe b320 is fixed with a gear 323 by a rotating shaft. The gear 323 meshes with the rack 330. When the threaded slider 312 moves the spray pipe b320 by the connecting pipe 322, the spray pipe b320 will move by the rotating shaft and the gear 323. Through the meshing principle, the spray pipe b320 will rotate between the two mounting plates b, so that the spray pipe b320 rotates when spraying water mist through the atomizing nozzle b321, thereby increasing the spray area and improving the contact area between the water mist and the flue gas.

[0026] The second spray device 200 is positioned above the first spray device 300. The second spray device 200 includes two mounting plates a210, which are fixed to the upper front and upper rear sides of the inner walls on both sides of the environmental protection tower body 100, respectively. Multiple spray pipes a220 are rotatably connected between the two mounting plates a210. Atomizing nozzles a221 are fixedly connected to the bottom of the outer wall of each spray pipe a220. The spray pipes a220 can spray water mist again through the atomizing nozzles a221 to purify the flue gas. The center of the top of the outer wall of each spray pipe a220 is fixed... A water inlet branch pipe a230 is connected to the fixed connection. The water inlet branch pipe a230 is made of flexible rubber. Two adjacent spray pipes a220 are connected by a connecting rod. An electric cylinder 240 is fixed on the left side of the outer wall of the environmental protection tower body 100 and at the position corresponding to the spray pipe a220. The output end of the electric cylinder 240 is hinged to one side of the outer wall of the leftmost spray pipe a220. The electric cylinder 240 can pull the spray pipe a220 to swing left and right on the mounting plate a210 through its output end, thereby increasing the spray area of ​​the spray pipe a220 and the atomizing nozzle a221.

[0027] The third spray device 400 is positioned above the second spray device 200. The top of the inner wall of the environmental protection tower 100 is fixedly connected to the exhaust pipe 130. The third spray device 400 includes a hollow base 410. A conical base 420 is fixed to the bottom of the outer wall of the hollow base 410. The outer wall of the hollow base 410 is fixed to the inner wall of the environmental protection tower 100. A through groove is provided on the outer wall of the conical base 420. The through groove is provided to facilitate the entry of flue gas into the hollow base 410 and to facilitate the discharge of water sprayed from the liquid storage tray 430. A liquid storage tray 430 is fixed to the inner wall of the hollow base 410. A gap is left between the liquid storage tray 430 and the inner wall of the hollow base 410 to facilitate the passage of flue gas. An atomizing nozzle c is fixedly connected to the bottom of the outer wall of the liquid storage tray 430. Multiple atomizing nozzles c are arranged in a ring array.

[0028] A heat recovery assembly is installed on one side of the outer wall of the environmental protection tower 100. The heat recovery assembly includes a reflux pump 500. The inlet end of the reflux pump 500 is fixedly connected to the output end of a heat pump unit 510. The input end of the heat pump unit 510 is fixedly connected to the bottom right side of the inner wall of the environmental protection tower 100. The outlet end of the reflux pump 500 is fixedly connected to a water inlet pipe 520. After the water mist comes into contact with the flue gas, heat exchange occurs, and the temperature of the spray water increases while the temperature of the flue gas decreases. Therefore, the spray water, carrying its temperature, is transported through the heat pump unit 510 to the reflux pump 500. The reflux pump 500 is a heat pump type integrated water-air or water-water air conditioning unit that uses water as a heat source and can perform heating circulation. The reflux pump 500 can convert the heat source in the spray water into hot air for heating. The top of the outer wall of the connecting pipe 322 is connected to the inlet pipe 520 through the inlet branch pipe b. The material of the inlet branch pipe b is also rubber. The end of the inlet branch pipe a230 away from the spray pipe a220 is connected to the inlet pipe 520. The inner wall of the hollow seat 410 is connected to the inlet pipe 520 through the inlet branch pipe c.

[0029] The usage process of this invention is as follows: First, the flue gas discharged from the aluminum melting furnace can be transported to the smoke spray pipe 120 through the induced draft fan and the smoke inlet pipe 110 and then sprayed out from the smoke spray pipe 120. The flue gas will drift to the upper layer of the environmental protection tower 100. Then, the backflow pump 500 will transport the spray water to the water inlet pipe 520. The water inlet pipe 520 will first transport the spray water to the connecting pipe 322 through the water inlet branch pipe b, and then transport it to the spray pipe b320 through the connecting pipe 322. The spray pipe b320 can spray water atomized through the atomizing nozzle b321. At the same time, the drive motor 310 will drive the screw 311 to rotate, so that the screw 311 can drive the spray pipe b320 to move through the threaded slider 312 and the connecting pipe 322. At the same time, the meshing action of the gear 323 and the rack 330 can make the spray pipe b320 rotate while moving, thereby increasing the contact area between the spray water and the flue gas.

[0030] The flue gas will then continue to move upward. The water inlet pipe 520 will deliver water to the spray pipe a220 through the water inlet branch pipe a230. The spray pipe a220 can spray water through the atomizing nozzle a221 to continue purifying the flue gas. During the purification process, the electric cylinder 240 will pull the spray pipe a220 to swing left and right on the mounting plate a210 through its output end, thereby increasing the spray area of ​​the spray pipe a220 and the atomizing nozzle a221.

[0031] Then the flue gas will enter the hollow seat 410 through the bottom of the conical base 420. The water inlet pipe 520 can transport the spray water to the liquid storage pan 430 through the water inlet branch pipe c. The liquid storage pan 430 sprays the flue gas through the atomizing nozzle c to perform the final purification of the flue gas. The purified flue gas will enter the exhaust pipe 130 through the through groove at the top of the hollow seat 410 and be discharged.

[0032] The spray water carries heat when it comes into contact with the flue gas. After use, the spray water is returned to the return pump 500 through the heat pump unit 510 for heat exchange, thus enabling the recovery and reuse of heat.

[0033] The above description is merely a preferred embodiment of the present invention. Any person skilled in the art can modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An energy-saving and environmentally friendly tower system applied to the flue gas system of an aluminum melting furnace, comprising an environmental protection tower body (100), wherein a flue gas inlet pipe (110) is fixedly connected to the bottom of one side of the outer wall of the environmental protection tower body (100), and a flue gas spray pipe (120) is fixedly connected to the inner wall of the environmental protection tower body (100) at a position corresponding to the flue gas inlet pipe (110), characterized in that: The interior of the environmental protection tower (100) is equipped with a purification component for purifying high-temperature flue gas. The purification component includes a second spray device (200), a first spray device (300), and a third spray device (400). The first spray device (300) includes a front mounting plate b and a rear mounting plate b. The two ends of the front mounting plate b are respectively fixed to the front ends of the inner walls on both sides of the environmental protection tower (100), and the two ends of the rear mounting plate b are respectively fixed to the rear ends of the inner walls on both sides of the environmental protection tower (100). A spray pipe b (320) is slidably arranged between the two mounting plates b. An atomizing nozzle b (321) is fixedly connected to the outer wall of the spray pipe b (320). Multiple atomizing nozzles b (321) are evenly arranged in a ring array. A connecting pipe (322) is rotatably connected to the front end of the outer wall of the spray pipe b (320). A connecting pipe (322) is fixed on the front mounting plate b. Two fixed plates are rotatably connected between the two fixed plates by a screw (311). A drive motor (310) is fixed on the side of the fixed plate away from the screw (311). The output end of the drive motor (310) is fixed to one end of the screw (311). A threaded slider (312) is threadedly connected to the outer wall of the screw (311). The front end of the connecting pipe (322) passes through the front mounting plate b and is fixedly connected to the threaded slider (312). The front mounting plate b is provided with a first strip groove for the sliding of the connecting pipe (322). The rear mounting plate b is provided with a second strip groove. A rack (330) is fixed at the bottom of the inner wall of the second strip groove. A gear (323) is fixed to the rear end of the spray pipe b (320) through a rotating shaft. The gear (323) meshes with the rack (330). A heat recovery component is provided on one side of the outer wall of the environmental protection tower body (100).

2. The energy-saving and environmentally friendly tower system applied to the flue gas system of an aluminum melting furnace according to claim 1, characterized in that: The first spray device (300) is installed on the inner wall of the environmental protection tower (100) and above the smoke spray pipe (120). The second spray device (200) is installed above the first spray device (300). The third spray device (400) is installed above the second spray device (200). The top of the inner wall of the environmental protection tower (100) is fixedly connected to the smoke exhaust pipe (130).

3. The energy-saving and environmentally friendly tower system applied to the flue gas system of an aluminum melting furnace according to claim 2, characterized in that: The second spray device (200) includes two mounting plates a (210). The two mounting plates a (210) are fixed to the upper front end and the upper rear end of the inner wall on both sides of the environmental protection tower body (100), respectively. Multiple spray pipes a (220) are rotatably connected between the two mounting plates a (210). Atomizing nozzles a (221) are fixedly connected to the bottom of the outer wall of each spray pipe a (220). A water inlet branch pipe a (230) is fixedly connected to the center of the top of the outer wall of each spray pipe a (220).

4. The energy-saving and environmentally friendly tower system applied to the flue gas system of an aluminum melting furnace according to claim 3, characterized in that: The two adjacent spray pipes a (220) are fixed together by a connecting rod. An electric cylinder (240) is fixed on the left side of the outer wall of the environmental protection tower body (100) at a position corresponding to the spray pipe a (220). The output end of the electric cylinder (240) is hinged to one side of the outer wall of the leftmost spray pipe a (220).

5. The energy-saving and environmentally friendly tower system applied to the flue gas system of an aluminum melting furnace according to claim 4, characterized in that: The third spray device (400) includes a hollow base (410), and a conical base (420) is fixed to the bottom of the outer wall of the hollow base (410). The outer wall of the hollow base (410) is fixed to the inner wall of the environmental protection tower (100), and a through groove is provided on the outer wall of the conical base (420).

6. The energy-saving and environmentally friendly tower system applied to the flue gas system of an aluminum melting furnace according to claim 5, characterized in that: The inner wall of the hollow seat (410) is fixed with a liquid storage tray (430), and the bottom of the outer wall of the liquid storage tray (430) is fixedly connected with an atomizing nozzle c. Multiple atomizing nozzles c are arranged in a ring array.

7. The energy-saving and environmentally friendly tower system applied to the flue gas system of an aluminum melting furnace according to claim 5, characterized in that: The heat recovery assembly includes a reflux pump (500), the inlet end of which is fixedly connected to the output end of a heat pump unit (510), the input end of which is fixedly connected to the bottom right side of the inner wall of the environmental protection tower (100), the outlet end of which is fixedly connected to a water inlet pipe (520), the top of the outer wall of the connecting pipe (322) is connected to the water inlet pipe (520) through a water inlet branch pipe b, the end of the water inlet branch pipe a (230) away from the spray pipe a (220) is connected to the water inlet pipe (520), and one side of the inner wall of the hollow seat (410) is connected to the water inlet pipe (520) through a water inlet branch pipe c.

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