Energy regeneration device for secondary aluminum ash treatment

Abstract

The energy regeneration device comprises a water storage tank with an upward opening and a sealing cover hinged to the top end of the water storage tank, the water storage tank is connected with the side, far away from the hinged position, of the sealing cover through a locking device, a spiral heat exchange pipe is arranged in the water storage tank, the section of the spiral heat exchange pipe is in a Tesla valve shape, and the sealing cover is connected with the spiral heat exchange pipe. The two ends of the spiral heat exchange pipe penetrate through the inner wall of the water storage tank, extend out of the water storage tank and communicate with a gas conveying pipe used for conveying high-temperature waste gas and an exhaust pipe used for exhausting the waste gas correspondingly, and the upper portion and the lower portion of the outer wall of the water storage tank communicate with a water conveying pipeline and a water discharging pipeline which are used for conveying an external water source correspondingly. The cross section of the spiral heat exchange pipe is arranged to be in the Tesla valve shape, so that the flowing speed of waste gas is slowed down when the waste gas passes through the spiral heat exchange pipe, sufficient heat exchange time is provided for the waste gas and water, and then the heat energy utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of heat energy recovery, in particular to an energy regeneration device for secondary aluminum ash treatment. Background Art

[0002] Aluminum ash is the waste residue generated in the production process of the aluminum industry. It is divided into primary aluminum ash and secondary aluminum ash. Except for the difference in aluminum content, the two types of aluminum ash have similar material compositions and are both reactive in environmental hazards. Some aluminum ash also has leaching toxicity or releases flammable waste gas when in contact with water. Its treatment includes harmless process and resource-based process. Among them, the harmless process of aluminum ash hazardous waste disposal plan: through acid leaching, alkali leaching, washing and other methods, the nitride, fluoride, salt and other impurities in the secondary aluminum ash are removed to obtain harmless aluminum ash and then safely landfilled. Resource-based process: After removing toxic and hazardous substances, the secondary aluminum ash is processed by high temperature or cold processing to make different products such as steel claw protection rings, brown corundum abrasives, refining agents and water purifiers, or returned to the electrolytic cell as raw material for electrolytic aluminum;

[0003] Among them, most of the existing treatment methods adopt the method of adding oxidizing agent and reducing agent, then smelting at high temperature in a rotary kiln, and then cooling, crushing and ball milling to obtain calcium aluminate powder. Calcium aluminate powder can be used as a blast furnace slag remover and fire extinguishing agent, and is a very economical material. This not only makes the secondary aluminum ash harmless, but also creates a certain economic effect. Among them, the waste aluminum ash will produce ammonia when it is placed in the air, which can be released in advance through water washing and purification to reduce pollution;

[0004] However, in actual use, the thermite reaction that occurs during the washing process will produce a large amount of high-temperature exhaust gas overflow. For the overflow of these high-temperature exhaust gases, direct discharge is often adopted. This treatment method undoubtedly ignores the thermal utilization value of the high-temperature exhaust gas. Utility Model Content

[0005] The purpose of the utility model is to provide an energy regeneration device for secondary aluminum ash treatment to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: an energy regeneration device for secondary aluminum ash treatment, comprising a water storage tank with an opening facing upward and a sealing cover hingedly arranged at the top of the water storage tank, the water storage tank and the sealing cover are connected to each other on a side away from the hinge through a locking device, a spiral heat exchange tube is arranged in the water storage tank, the cross-section of the spiral heat exchange tube is in the shape of a Tesla valve, both ends of the spiral heat exchange tube pass through the inner wall of the water storage tank and extend out of the water storage tank, and are respectively connected with a gas supply pipe for conveying high-temperature exhaust gas and an exhaust pipe for discharging exhaust gas, the upper and lower parts of the outer wall of the water storage tank are respectively connected with a water supply pipeline and a drainage pipeline for conveying external water sources.

[0007] Furthermore, it also includes an external central control unit, and two electric control valves are respectively provided on the water supply pipeline and the drainage pipeline, and the electric control valves are electrically connected to the central control unit.

[0008] Furthermore, a motor electrically connected to the central control unit is provided at the bottom end of the water tank, and a transmission shaft is provided in the water tank, with both ends rotatably connected to the bottom end of the inner wall of the water tank and the top end of the inner wall of the sealing cover respectively, the bottom end of the transmission shaft is transmission-connected to the execution end of the motor, and stirring rods are evenly arranged on the outer wall of the transmission shaft.

[0009] Furthermore, a temperature measuring unit electrically connected to the central control unit is provided on the inner wall of the water storage tank.

[0010] Furthermore, an upper liquid level sensor and a lower liquid level sensor are respectively disposed on the upper portion and the lower portion of the inner wall of the water storage tank, and both the upper liquid level sensor and the lower liquid level sensor are electrically connected to the central control unit.

[0011] Furthermore, a pressure detection unit electrically connected to the central control unit is provided at the top of the sealing cover, an execution end of the pressure detection unit passes through the top of the sealing cover and extends into the water storage tank, a pressure relief port is provided at the top of the sealing cover, and an electromagnetic one-way valve electrically connected to the central control unit is provided at the output end of the pressure relief port.

[0012] The beneficial effect achieved by the utility model is as follows: the high-temperature exhaust gas generated in the secondary aluminum ash treatment process is transported to the spiral heat exchange tube, and heat exchange is carried out with the water in the water storage tank, so that the heat in the exhaust gas is effectively utilized, and at the same time, the cross-section of the spiral heat exchange tube is in the shape of a Tesla valve, so that the flow speed of the exhaust gas when passing through the spiral heat exchange tube is slowed down, so as to give the exhaust gas and water time for sufficient heat exchange, and further increase the thermal energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a cross-sectional view of an energy regeneration device for secondary aluminum ash treatment in an embodiment;

[0014] Figure 2 It is a cross-sectional view of the spiral heat exchange tube in the embodiment. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] like Figure 1-2As shown, the utility model discloses an energy regeneration device for secondary aluminum ash treatment, comprising: a water storage tank 1 with an opening facing upward and a sealing cover 2 hingedly arranged at the top of the water storage tank 1, the water storage tank 1 and the sealing cover 2 are connected by a locking device on a side away from the hinge, a spiral heat exchange tube 3 is arranged in the water storage tank 1, the cross section of the spiral heat exchange tube 3 is in the shape of a Tesla valve, both ends of the spiral heat exchange tube 3 pass through the inner wall of the water storage tank 1 and extend out of the water storage tank 1, and are respectively connected with an air supply pipe 4 for conveying high-temperature exhaust gas and an exhaust pipe 5 for discharging exhaust gas, and the upper and lower parts of the outer wall of the water storage tank 1 are respectively connected with a water supply pipeline 6 and a drainage pipeline 7 for conveying external water sources.

[0017] Further, such as Figure 1 As shown, an external central control unit 8 is also included. Two electric control valves 9 are respectively provided on the water supply pipeline 6 and the drainage pipeline 7. The electric control valves 9 are electrically connected to the central control unit 8.

[0018] Further, such as Figure 1 As shown, a motor 15 electrically connected to the central control unit 8 is provided at the bottom end of the water tank 1, and a transmission shaft 16 is provided in the water tank 1, whose two ends are rotatably connected to the bottom end of the inner wall of the water tank 1 and the top end of the inner wall of the sealing cover 2 respectively, and the bottom end of the transmission shaft 16 is transmission-connected to the execution end of the motor 15, and stirring rods 17 are evenly arranged on the outer wall of the transmission shaft 16.

[0019] Further, such as Figure 1 As shown, a temperature measuring unit 10 electrically connected to the central control unit 8 is provided on the inner wall of the water storage tank 1 .

[0020] Further, such as Figure 1 As shown, an upper liquid level sensor 11 and a lower liquid level sensor 12 are respectively disposed on the upper and lower parts of the inner wall of the water storage tank 1 , and both the upper liquid level sensor 11 and the lower liquid level sensor 12 are electrically connected to the central control unit 8 .

[0021] Further, such as Figure 1 As shown, in order to prevent the water in the water tank from generating a surge in pressure due to water vapor generated during the heat exchange process, a pressure detection unit 13 electrically connected to the central control unit 8 is provided at the top of the sealing cover 2. The execution end of the pressure detection unit 13 passes through the top of the sealing cover 2 and extends into the water tank 1. A pressure relief port 21 is provided at the top of the sealing cover 2. An electromagnetic one-way valve 14 electrically connected to the central control unit 8 is provided at the output end of the pressure relief port 21. When the pressure detection unit 13 detects that the pressure in the water tank 1 exceeds a predetermined value, the central control unit 8 starts the electromagnetic one-way valve 14, and the pressure relief port 21 discharges the pressure in the water tank 1.

[0022] Based on the above structure, Figure 1-2As shown, when in use, the exhaust gas is transported to the spiral heat exchange tube 3 through the gas delivery pipe 4, and the spiral heat exchange tube 3 conducts the temperature in the exhaust gas to exchange heat with the water in the water storage tank 1. At the same time, the cross-section of the spiral heat exchange tube 3 is in the shape of a Tesla valve, so that the flow speed of the exhaust gas in the spiral heat exchange tube 3 is slowed down, thereby giving the exhaust gas and water enough time for heat exchange, thereby increasing the utilization rate of thermal energy. After the heat exchange is completed, the exhaust gas is discharged from the exhaust pipe 5;

[0023] During the heat exchange between the exhaust gas and the water in the water storage tank 1, the motor 15 drives the transmission shaft 16 to drive the stirring rod 17 to stir the water in the water storage tank 1, so that the water in the water storage tank 1 can be evenly heat exchanged;

[0024] When the water in the water tank 1 reaches a predetermined temperature, the temperature measuring unit 10 is triggered, and the temperature measuring unit 10 starts the electric control valve 9 on the drainage pipeline 7 through the central control unit 8, and the drainage pipeline 7 discharges the water in the water tank 1. When the water in the water tank 1 triggers the lower liquid level sensor 12, the electric control valve 9 on the drainage pipeline 7 is closed, and the electric control valve 9 on the water supply pipeline 6 is opened, and the external water source is transported to the water tank 1 through the water supply pipeline 6. When the water level in the water tank 1 triggers the upper liquid level sensor 11, the electric control valve 9 on the water supply pipeline 6 is closed, and the water in the water tank 1 is re-heat exchanged, and so on.

[0025] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An energy regeneration device for secondary aluminum ash treatment, comprising a water storage tank (1) with an opening facing upward and a sealing cover (2) hingedly arranged at the top of the water storage tank (1), wherein the water storage tank (1) and the sealing cover (2) are connected at a side away from the hinge by a locking device, It is characterized in that A spiral heat exchange tube (3) is arranged in the water storage tank (1), and the cross section of the spiral heat exchange tube (3) is in the shape of a Tesla valve. Both ends of the spiral heat exchange tube (3) pass through the inner wall of the water storage tank (1) and extend out of the water storage tank (1), and are respectively connected to a gas supply pipe (4) for conveying high-temperature exhaust gas and an exhaust pipe (5) for discharging exhaust gas. The upper part and the lower part of the outer wall of the water storage tank (1) are respectively connected to a water supply pipeline (6) for conveying external water source and a drainage pipeline (7).

2. An energy regeneration device for secondary aluminum ash treatment according to claim 1, Features: It also includes an external central control unit (8), and two electric control valves (9) are respectively provided on the water supply pipeline (6) and the drainage pipeline (7), and the electric control valves (9) are electrically connected to the central control unit (8).

3. An energy regeneration device for secondary aluminum ash treatment according to claim 2, Features: A motor (15) electrically connected to the central control unit (8) is arranged at the bottom end of the water storage tank (1), and a transmission shaft (16) is arranged inside the water storage tank (1), with two ends respectively rotatably connected to the bottom end of the inner wall of the water storage tank (1) and the top end of the inner wall of the sealing cover (2), the bottom end of the transmission shaft (16) is transmission-connected to the execution end of the motor (15), and stirring rods (17) are evenly arranged on the outer wall of the transmission shaft (16).

4. The energy regeneration device for secondary aluminum ash treatment according to claim 2, Features: A temperature measuring unit (10) electrically connected to the central control unit (8) is provided on the inner wall of the water storage tank (1).

5. The energy regeneration device for secondary aluminum ash treatment according to claim 2, Features: An upper liquid level sensor (11) and a lower liquid level sensor (12) are respectively arranged at the upper and lower parts of the inner wall of the water storage tank (1), and both the upper liquid level sensor (11) and the lower liquid level sensor (12) are electrically connected to the central control unit (8).

6. The energy regeneration device for secondary aluminum ash treatment according to claim 2, Features: The top of the sealing cover (2) is provided with a pressure detection unit (13) electrically connected to the central control unit (8); the execution end of the pressure detection unit (13) passes through the top of the sealing cover (2) and extends into the water storage tank (1); the top of the sealing cover (2) is provided with a pressure relief port (21); the output end of the pressure relief port (21) is provided with an electromagnetic one-way valve (14) electrically connected to the central control unit (8).

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