Waste heat recycling device of aluminum alloy smelting furnace

Abstract

The utility model discloses an aluminum alloy smelting furnace waste heat recycling device which comprises a furnace body and a heat exchange chamber arranged on one side of the furnace body, a smoke exhaust pipe connected with the heat exchange chamber is fixedly connected to the top of the furnace body, and a smoke outlet pipe is fixedly connected to the side, opposite to the smoke exhaust pipe, of the top of the heat exchange chamber. A plurality of heat exchange pipes are evenly arranged in the heat exchange chamber, a scraper plate slidably connected to the outer sides of the heat exchange pipes is arranged on the side, close to the smoke outlet pipe, in the boiler body, the top of the scraper plate is fixedly connected with an operation rod extending to the outer side of the boiler body, and the top of the heat exchange chamber is further fixedly connected with a cleaning water inlet pipe. A cleaning water discharging pipe is fixedly connected to the side, close to the smoke discharging pipe, of the bottom of the heat exchange chamber. Through the structure, the heat exchange pipe can be kept clean, the heat exchange efficiency is ensured, meanwhile, water after heat exchange is introduced into the preheating chamber to preheat the furnace body, and waste heat can be better recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery and utilization, in particular to a waste heat recovery and utilization device for an aluminum alloy melting furnace. Background Technique

[0002] As a typical high-energy-consuming industry, the aluminum smelting and processing industry has great potential in energy conservation and emission reduction. Waste heat recovery and utilization is an important way for the aluminum smelting and processing industry to save and efficiently utilize energy.

[0003] In the prior art, through retrieval, it is found that a Chinese patent discloses a waste heat recovery device for a melting furnace used in aluminum ingot production, with the application number 202020555115.8. This patent mainly includes a furnace body. An inlet is opened on the front of the furnace body. A bottom body is fixedly installed at the bottom end of the furnace body. A discharge pipe is connected to the right side of the furnace body. One end of the discharge pipe away from the furnace body is connected to a water heating bucket. An outlet pipe is connected to the right side of the water heating bucket. An inlet pipe is connected to the top end of the water heating bucket. Although the above utility model increases the contact area between the water inside the water heating bucket and the curved pipe due to the curved shape of the curved pipe, making the water inside heated faster, and speeds up the cooling of the tail gas inside the curved pipe, reducing the pollution of the air by the hot tail gas and protecting the air environment. However, directly introducing the waste gas generated by the furnace body into the curved pipe for heat exchange, the soot in the waste gas is likely to deposit inside the curved pipe, causing blockage and affecting the heat exchange efficiency. At the same time, due to the structural characteristics of the curved pipe, it is more difficult to clean, and serious blockage problems may occur after long-term operation, thereby affecting the stable operation of the entire waste heat recovery device. Therefore, those skilled in the art provide a waste heat recovery and utilization device for an aluminum alloy melting furnace to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to provide a waste heat recovery and utilization device for an aluminum alloy melting furnace, which can keep the heat exchange pipes clean, ensure the heat exchange efficiency, and at the same time, after the heated water body is introduced into the preheating chamber, it can preheat the furnace body, and better recover and utilize the waste heat.

[0005] To achieve the above purpose, a waste heat recovery and utilization device for an aluminum alloy melting furnace is provided, including a furnace body and a heat exchange chamber arranged on one side of the furnace body. A smoke exhaust pipe connected to the heat exchange chamber is fixedly connected to the top of the furnace body. A smoke outlet pipe is fixedly connected to the top of the heat exchange chamber and opposite to the smoke exhaust pipe. A plurality of heat exchange pipes are evenly arranged inside the heat exchange chamber. A scraper slidably connected to the outside of the heat exchange pipes is arranged inside the furnace body and close to the side of the smoke outlet pipe. An operating rod extending to the outside of the furnace body is fixedly connected to the top of the scraper. A cleaning water inlet pipe is also fixedly connected to the top of the heat exchange chamber. A cleaning water discharge pipe is fixedly connected to the bottom of the heat exchange chamber and close to the side of the smoke exhaust pipe.

[0006] According to the described waste heat recovery and utilization device for an aluminum alloy melting furnace, a water inlet main pipe and a water outlet main pipe are respectively arranged at two ends of the heat exchange chamber. The water outlet main pipe is close to the furnace body. A plurality of branch pipes are equally spaced and fixedly connected to the tops of the water inlet main pipe and the water outlet main pipe. Both ends of the plurality of heat exchange pipes are connected to the corresponding branch pipes.

[0007] According to the described waste heat recovery and utilization device for an aluminum alloy melting furnace, a preheating chamber with a hollow structure is arranged outside the furnace body. A water delivery pipe connected to the preheating chamber is fixedly connected to the outside of the water outlet main pipe. A drain pipe is fixedly connected to one side of the bottom of the preheating chamber far from the water delivery pipe.

[0008] According to the described waste heat recovery and utilization device for an aluminum alloy melting furnace, a heat preservation layer is arranged outside the preheating chamber.

[0009] According to the described waste heat recovery and utilization device for an aluminum alloy melting furnace, valves are arranged outside the cleaning water inlet pipe, the cleaning water discharge pipe, the water delivery pipe and the drain pipe, and the valves are all solenoid valves.

[0010] According to the described waste heat recovery and utilization device for an aluminum alloy melting furnace, the diameter of the scraper is smaller than the inner diameter of the furnace body.

[0011] According to the described waste heat recovery and utilization device for an aluminum alloy melting furnace, an upper cover is covered on one side of the top of the furnace body where the smoke exhaust pipe is located, and a lifting ring is fixedly connected to the top of the upper cover.

[0012] According to the described waste heat recovery and utilization device for an aluminum alloy melting furnace, an operation handle is installed on one side of the operating rod opposite to the scraper.

[0013] The present utility model has the following beneficial effects:

[0014] 1. Compared with the prior art, for the described waste heat recovery and utilization device for an aluminum alloy melting furnace, by cleaning the heat exchange pipes, the accumulation of dirt and sediments on the heat exchange pipes can be prevented, which is beneficial to keeping the heat exchange pipes clean and ensuring the heat exchange efficiency.

[0015] 2. Compared with the prior art, for the described waste heat recovery and utilization device for an aluminum alloy melting furnace, after the heat-exchanged water body is introduced into the preheating chamber, the furnace body can be preheated, so as to shorten the time for the furnace body to reach the working temperature, thereby improving the production efficiency. And preheating the furnace body helps to reduce the energy consumption at the beginning of melting and better recover and utilize the waste heat.

[0016] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 It is a schematic diagram of the first overall structure of a waste heat recovery and utilization device for an aluminum alloy melting furnace of the present utility model;

[0019] Figure 2 It is a schematic diagram of the second overall structure of a waste heat recovery and utilization device for an aluminum alloy melting furnace of the present utility model;

[0020] Figure 3 It is a schematic diagram of the sectional structure of the furnace body of a waste heat recovery and utilization device for an aluminum alloy melting furnace of the present utility model;

[0021] Figure 4 It is a schematic diagram of the sectional structure of the heat exchange chamber of a waste heat recovery and utilization device for an aluminum alloy melting furnace of the present utility model.

[0022] Legend description:

[0023] 1. Furnace body; 2. Heat exchange chamber; 3. Smoke exhaust pipe; 4. Water inlet main pipe; 5. Water outlet main pipe; 6. Branch pipe; 7. Heat exchange pipe; 8. Smoke outlet pipe; 9. Operating rod; 10. Scraper; 11. Cleaning water inlet pipe; 12. Cleaning water discharge pipe; 13. Preheating chamber; 14. Water delivery pipe; 15. Drain pipe; 16. Heat insulation layer. Specific embodiments

[0024] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it should not be construed as a limitation on the protection scope of the present utility model.

[0025] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , an embodiment of a waste heat recovery and utilization device for an aluminum alloy melting furnace of the present utility model includes a furnace body 1 and a heat exchange chamber 2 provided on one side of the furnace body 1. A smoke exhaust pipe 3 connected to the heat exchange chamber 2 is fixedly connected to the top of the furnace body 1. A smoke outlet pipe 8 is fixedly connected to the top of the heat exchange chamber 2 and on the side opposite to the smoke exhaust pipe 3. A plurality of heat exchange pipes 7 are evenly arranged inside the heat exchange chamber 2. A scraper 10 slidably connected to the outside of the heat exchange pipes 7 is provided inside the furnace body 1 and on the side close to the smoke outlet pipe 8. The diameter of the scraper 10 is smaller than the inner diameter of the furnace body 1. An operating rod 9 extending to the outside of the furnace body 1 is fixedly connected to the top of the scraper 10. An operating handle is installed on the side of the operating rod 9 opposite to the scraper 10. The setting of the handle facilitates the operator to hold. A cleaning water inlet pipe 11 is also fixedly connected to the top of the heat exchange chamber 2. A cleaning water discharge pipe 12 is fixedly connected to the bottom of the heat exchange chamber 2 and on the side close to the smoke exhaust pipe 3.

[0026] During the smelting process of the aluminum melt, the high-temperature flue gas generated is transported to the inside of the heat exchange chamber 2 through the exhaust pipe 3. When passing through the heat exchange pipe 7, the heat is transferred to the cold water flowing through the heat exchange pipe 7, thereby realizing the heating of the water. In order to keep the heat exchange pipe 7 clean, the scraper 10 can clean the outer surface of the heat exchange pipe 7 under the control of the operating rod 9. At the same time, the cleaning water is introduced into the inside of the heat exchange chamber 2 through the cleaning water inlet pipe 11 for cleaning, and the waste water after cleaning is discharged through the cleaning water discharge pipe 12, then the cleaning work of the heat exchange pipe 7 can be completed. This can prevent the accumulation of dirt and deposits on the heat exchange pipe 7, facilitate keeping the heat exchange pipe 7 clean, and ensure the heat exchange efficiency.

[0027] Water inlet header pipes 4 and water outlet header pipes 5 are respectively arranged at both ends of the heat exchange chamber 2. The water outlet header pipe 5 is close to the furnace body 1. A plurality of branch pipes 6 are equally spaced and fixedly connected to the tops of the water inlet header pipe 4 and the water outlet header pipe 5. Both ends of a plurality of heat exchange pipes 7 are connected to the corresponding branch pipes 6 to form a complete heat exchange circuit.

[0028] Through the water inlet header pipe 4 and the water outlet header pipe 5, cold water is introduced into the heat exchange chamber 2. After passing through the heat exchange pipe 7, it is converted into hot water and discharged through the water outlet header pipe 5 for subsequent use.

[0029] In order to further improve the waste heat recovery utilization rate, a preheating chamber 13 with a hollow structure is arranged outside the furnace body 1, and a heat insulation layer 16 is arranged outside the preheating chamber 13 to reduce the heat loss of the furnace body 1. A water delivery pipe 14 connected to the preheating chamber 13 is fixedly connected to the outside of the water outlet header pipe 5, and a drain pipe 15 is fixedly connected to one side of the bottom of the preheating chamber 13 away from the water delivery pipe 14.

[0030] After introducing part of the heat-exchanged water into the preheating chamber 13, the furnace body 1 can be preheated to shorten the time for the furnace body 1 to reach the working temperature, thereby improving the production efficiency. At the same time, preheating the furnace body 1 helps to reduce the energy consumption at the beginning of smelting and better recover and utilize the waste heat.

[0031] Valves are arranged on the outsides of the cleaning water inlet pipe 11, the cleaning water discharge pipe 12, the water delivery pipe 14 and the drain pipe 15, and the valves are all solenoid valves. The valves can facilitate controlling the on-off states of the cleaning water inlet pipe 11, the cleaning water discharge pipe 12, the water delivery pipe 14 and the drain pipe 15, and are convenient for automatic control.

[0032] A top cover is covered on the top of the furnace body 1 and on one side of the exhaust pipe 3. The opening and closing of the top cover facilitates the opening and closing of the furnace body 1. And a lifting ring is fixedly connected to the top of the top cover, and the lifting ring is used for conveniently hoisting and fixing the top cover during the installation and maintenance processes.

[0033] Working principle: During the smelting process of the aluminum melt, the high-temperature flue gas generated is transported to the interior of the heat exchange chamber 2 through the exhaust pipe 3. When passing through the heat exchange pipe 7, it transfers heat to the cold water flowing through the heat exchange pipe 7, thereby realizing the heating of the water. In order to keep the heat exchange pipe 7 clean, the scraper 10 can clean the outer surface of the heat exchange pipe 7 under the control of the operating rod 9. At the same time, the cleaning water is introduced into the interior of the heat exchange chamber 2 through the cleaning water inlet pipe 11 for cleaning, and the waste water after cleaning is discharged through the cleaning water drain pipe 12 to complete the cleaning work of the heat exchange pipe 7, which can prevent the accumulation of dirt and sediments on the heat exchange pipe 7, is conducive to keeping the heat exchange pipe 7 clean, and ensures the heat exchange efficiency;

[0034] And part of the heat-exchanged water is introduced into the preheating chamber 13 to preheat the furnace body 1, so as to shorten the time for the furnace body 1 to reach the working temperature, thereby improving the production efficiency. At the same time, preheating the furnace body 1 helps to reduce the energy consumption at the beginning of smelting and better recover and utilize the waste heat.

[0035] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can also be made without departing from the purpose of the present invention.

Claims

1. An aluminum alloy melting furnace waste heat recovery and utilization device, characterized in that, It includes a furnace body (1) and a heat exchange chamber (2) provided on one side of the furnace body (1). A smoke exhaust pipe (3) connected to the heat exchange chamber (2) is fixedly connected to the top of the furnace body (1). An exhaust pipe (8) is fixedly connected to the top of the heat exchange chamber (2) on the side opposite to the smoke exhaust pipe (3). A plurality of heat exchange pipes (7) are evenly arranged inside the heat exchange chamber (2). A scraper (10) slidably connected to the outer side of the heat exchange pipes (7) is arranged inside the furnace body (1) on the side close to the exhaust pipe (8). An operating rod (9) extending to the outside of the furnace body (1) is fixedly connected to the top of the scraper (10). A cleaning water inlet pipe (11) is also fixedly connected to the top of the heat exchange chamber (2). A cleaning water discharge pipe (12) is fixedly connected to the bottom of the heat exchange chamber (2) on the side close to the smoke exhaust pipe (3).

2. The waste heat recovery and utilization device for an aluminum alloy melting furnace according to claim 1, characterized in that, A water inlet header pipe (4) and a water outlet header pipe (5) are respectively arranged at both ends of the heat exchange chamber (2). The water outlet header pipe (5) is close to the furnace body (1). A plurality of branch pipes (6) are fixedly connected to the tops of the water inlet header pipe (4) and the water outlet header pipe (5) at equal intervals. Both ends of the plurality of heat exchange pipes (7) are connected to the corresponding branch pipes (6).

3. The waste heat recovery and utilization device for an aluminum alloy melting furnace according to claim 2, wherein A preheating chamber (13) with a hollow structure is arranged on the outside of the furnace body (1). A water delivery pipe (14) connected to the preheating chamber (13) is fixedly connected to the outside of the water outlet header pipe (5). A drain pipe (15) is fixedly connected to the bottom of the preheating chamber (13) on the side far from the water delivery pipe (14).

4. An aluminum alloy melting furnace waste heat recovery and utilization device according to claim 3, characterized in that, A heat preservation layer (16) is arranged on the outside of the preheating chamber (13).

5. An aluminum alloy melting furnace waste heat recovery and utilization device according to claim 4, characterized in that, Valves are arranged on the outside of the cleaning water inlet pipe (11), the cleaning water discharge pipe (12), the water delivery pipe (14) and the drain pipe (15), and the valves are all solenoid valves.

6. The waste heat recovery and utilization device for an aluminum alloy melting furnace according to claim 1, characterized in that, The diameter of the scraper (10) is smaller than the inner diameter of the furnace body (1).

7. The waste heat recovery and utilization device for an aluminum alloy melting furnace according to claim 6, characterized in that, A top cover is covered on the top of the furnace body (1) on the side of the smoke exhaust pipe (3), and a lifting ring is fixedly connected to the top of the top cover.

8. The waste heat recovery and utilization device for an aluminum alloy melting furnace according to claim 7, characterized in that, An operating handle is installed on the side of the operating rod (9) opposite to the scraper (10).

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