Denitrification equipment and method based on aluminum ash

Abstract

The invention discloses denitrification equipment and method based on aluminum ash, the denitrification equipment comprises a base and a heating barrel, a rotating seat is arranged at the front position of the upper surface of the base, a rear supporting seat is arranged at the rear position of the upper surface of the base, a front supporting seat is hinged to the upper surface of the rotating seat, and a motor is arranged in the center of the upper surface of the base; a driving shaft of the motor is provided with a driving gear; inner rings are arranged at the positions, close to the front portion and the rear portion, of the surface of the heating barrel, outer rings are rotationally installed on the outer surfaces of the inner rings, and the outer rings close to the front portion are lapped on the front supporting seat. In the invention, after the aluminum ash is calcined, the heating barrel and the aluminum ash in the heating barrel are cooled to a natural temperature state, a worker holds a handle, opens a barrel cover, hangs the barrel cover on a hook by using hoisting equipment and hoists the barrel cover, and the front supporting seat and the rotating seat are rotationally connected, so that the tail part of the heating barrel can be hoisted, and the whole heating barrel is inclined; and the opening part of the heating barrel faces downwards, so that aluminum ash after internal calcination can be conveniently poured out.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum ash treatment, and in particular to a denitrification device and method based on aluminum ash. Background Art

[0002] Aluminum ash is a kind of slag produced in the production process of electrolytic aluminum and recycled aluminum. It is produced in all processes of aluminum production, application and recycling. The aluminum ash produced by smelting aluminum and aluminum alloys is generally called primary aluminum ash. Since primary aluminum ash often contains more than 50% of metallic aluminum, factories generally recover metallic aluminum by frying or ball milling. The aluminum ash remaining after extracting metallic aluminum is called secondary aluminum ash. After the secondary aluminum ash has been recycled for one or more times, the aluminum content is very low and the utilization value is low. It mainly contains aluminum oxide, aluminum nitride, aluminum carbide, a small amount of metallic aluminum, iron silicon magnesium oxide, chloride, fluoride, etc. Since aluminum ash contains a small amount of chloride and fluoride that are soluble in water, it is very easy to react in humid air to generate toxic, harmful, explosive and smelly gases; when secondary aluminum ash is piled up or landfilled, it will cause pollution of water resources, atmosphere and soil, and have a serious impact on the environment. Therefore, aluminum ash is identified as a harmful, highly flammable and irritating substance, a hazardous waste, and must be harmlessly treated.

[0003] The harmless treatment of secondary aluminum ash mainly removes harmful components in aluminum ash, mainly denitrification, fluorine fixation, and salt removal, so that the products produced meet the corresponding national or industry product quality standards. At present, the harmless treatment of secondary aluminum ash can be divided into wet treatment and dry calcination; dry calcination is to heat the aluminum ash to a certain temperature to remove the nitrogen element in the aluminum ash; however, in some existing aluminum ash calcination equipment, the aluminum ash is accumulated in the equipment, and during the calcination process, there is a situation of uneven temperature.

[0004] The present invention is proposed in view of the above problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a denitrification device and method based on aluminum ash to solve the problems mentioned in the background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions.

[0007] The present invention provides a denitrification device and method based on aluminum ash, comprising a base and a heating barrel, wherein a rotating seat is arranged at the front position of the upper surface of the base, a rear supporting seat is arranged at the rear position of the upper surface of the base, a front supporting seat is hingedly connected to the upper surface of the rotating seat, a motor is arranged at the center of the upper surface of the base, and a driving gear is arranged on the driving shaft of the motor;

[0008] The surface of the heating barrel is provided with an inner ring at the front and rear positions, and an outer ring is rotatably mounted on the outer surface of the inner ring. The outer ring is placed on the front support seat at the front and on the rear support seat at the rear. A circular driven gear ring is provided in the middle position of the surface of the heating barrel, and the driving gear meshes with the driven gear ring;

[0009] The inner wall of the heating barrel is provided with a spiral electric heating tube, a front bracket is provided at the front position inside the heating barrel, a center beam is horizontally provided between the front bracket and the right side wall of the heating barrel, and the center beam is located at the central axis position of the heating barrel;

[0010] Four material plates are evenly arranged at equal intervals on the surface of the central beam, and a plurality of through holes penetrating the material plates are arranged on the surface of the material plates. One side of the material plates away from the central beam is close to the electric heating tube.

[0011] Preferably, the left end of the heating barrel is open, a barrel cover is hingedly connected to the open position of the left end of the heating barrel, an annular sealing gasket is arranged on the inner surface of the barrel cover, the outer diameter of the sealing gasket is consistent with the open inner diameter of the heating barrel, and a handle is arranged on the front of the barrel cover away from its rotating shaft.

[0012] Preferably, the four material plates are evenly distributed around the surface of the central beam, and the material plates are arranged along the length direction of the central beam.

[0013] Preferably, the plurality of through holes are evenly arranged at equal intervals along the length direction and the width direction of the material plate.

[0014] Preferably, a plurality of blocks are evenly arranged at equal intervals on the surface of the electric heating tube along the spiral direction of the electric heating tube, and the blocks are mounted on the inner wall of the heating barrel by bolts.

[0015] Preferably, two conductive joints are symmetrically arranged at the central position of the right side of the heating barrel, and the two conductive joints are respectively connected to the positive electrode and the negative electrode of the electric heating tube.

[0016] Preferably, a temperature transmitter is provided at the front position of the surface of the heating barrel, the detection rod of the temperature transmitter is located inside the heating barrel, an exhaust pipe connected to the inside of the heating barrel is provided above the right side of the heating barrel, a one-way valve is installed on the exhaust pipe, and a hook is provided in the middle position of the right side of the heating barrel.

[0017] Preferably, the front bracket is in a "cross" shape, a socket is provided in the middle of the front bracket, and the front end of the center beam is plugged into the socket.

[0018] Preferably, rotatable rollers are provided in the middle of the front support seat and the rear support seat via a rotating shaft, and the outer ring is in contact with the rollers.

[0019] A method for using a denitrification device based on aluminum ash comprises the following steps:

[0020] S1. Open the barrel cover, put the aluminum ash into the heating barrel through the left end opening of the heating barrel, and close the barrel cover;

[0021] S2. Connect the conductive joint to an external power source, power on the electric heating tube to heat the aluminum ash in the barrel, and observe the temperature displayed on the temperature transmitter in real time;

[0022] S3, the motor works, driving the driving gear to rotate, the driving gear drives the driven gear ring to rotate, and the heating barrel rotates slowly accordingly, and the aluminum ash in the heating barrel can be naturally dispersed to be fully heated;

[0023] S4. After calcination is completed and cooled naturally, the lifting equipment is hung on the hook, the heating barrel is lifted to an inclined state, the barrel cover is opened, and the calcined aluminum ash flows out from the mouth of the heating barrel.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The aluminum ash is fed into the heating barrel from the mouth of the heating barrel, and then the barrel cover is closed. The two conductive joints are connected to an external power source, so that the electric heating tube is heated by conduction. The barrel cover and the mouth of the heating barrel are provided with a sealing gasket, so that the aluminum ash in the heating barrel is not easy to overflow, and the electric heating tube can quickly raise the temperature inside the heating barrel to a suitable temperature;

[0026] The temperature inside the heating barrel can be known in real time through the temperature transmitter, so that the working frequency of the electric heating tube can be controlled to control the calcination temperature in the heating barrel; a plurality of rollers are arranged between the inner ring and the outer ring, so that the inner ring and the outer ring form a bearing structure, and the heating barrel can rotate relative to the outer ring. When the motor is working, the driving gear can drive the driven gear ring to rotate, so that the heating barrel can rotate slowly;

[0027] The aluminum ash in the heating barrel can rotate slowly with the heating barrel, and the aluminum ash is located in the four material plates, so that when the aluminum ash and the material plates rotate, part of the aluminum ash can stay in the material plates respectively, and the aluminum ash can fall through the through holes. The four material plates can separate the aluminum ash, so that the aluminum ash can be fully and freely dispersed during the rotation process, so that the aluminum ash can fully exchange heat with the electric heating tube;

[0028] The aluminum ash at each position can be evenly heated to the appropriate calcination temperature range. When the aluminum ash reaches 700 degrees Celsius, the nitrogen in the aluminum ash begins to separate. When the temperature of the aluminum ash continues to rise to 900-1000 degrees Celsius, the nitrogen is completely separated from the aluminum ash; the nitrogen gas formed can be discharged from the exhaust pipe;

[0029] A one-way valve is installed on the exhaust pipe to protect the heating barrel. When the heating barrel is heating, the air inside the heating barrel can be discharged smoothly from the exhaust pipe, thus avoiding the danger caused by excessive air pressure in the heating barrel.

[0030] When the aluminum ash is calcined, the heating barrel and the aluminum ash inside cool to the natural temperature. The worker holds the handle and opens the barrel cover, hangs it on the hook with the lifting equipment, and lifts it up. Since the front support seat and the rotating seat are rotatably connected, the tail of the heating barrel can be lifted up, and the whole heating barrel is tilted, and the mouth of the heating barrel faces downward, which makes it convenient to pour out the aluminum ash after calcination inside. After the aluminum ash is fully and evenly calcined, there is almost no nitrogen element inside, so the aluminum ash is harmlessly treated. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a three-dimensional view of the heating barrel of the present invention when it lies flat;

[0032] Figure 2 It is a three-dimensional diagram of the heating barrel of the present invention when it lies flat from another angle;

[0033] Figure 3 It is a three-dimensional diagram of the rotating seat and the front supporting seat of the present invention;

[0034] Figure 4 It is a three-dimensional diagram of the electric heating tube of the front bracket of the present invention;

[0035] Figure 5 A three-dimensional diagram of the material plate and through holes of the present invention;

[0036] Figure 6 This is an overall three-dimensional diagram of the heating barrel of the present invention when it is tilted.

[0037] In the figure: 1. base; 11. rotating seat; 12. front support seat; 13. rear support seat; 14. motor; 15. driving gear; 2. heating barrel; 21. barrel cover; 211. handle; 212. sealing gasket; 22. inner ring; 23. outer ring; 24. driven gear ring; 25. temperature transmitter; 26. exhaust pipe; 261. one-way valve; 27. conductive connector; 28. hook; 3. front bracket; 31. center beam; 32. material plate; 33. through hole; 34. electric heating tube; 35. block. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] like Figure 1-6 As shown, a denitrification device and method based on aluminum ash includes a base 1 and a heating barrel 2, a rotating seat 11 is arranged at the front position of the upper surface of the base 1, a rear support seat 13 is arranged at the rear position of the upper surface of the base 1, a front support seat 12 is hingedly connected to the upper surface of the rotating seat 1, a motor 14 is arranged at the center of the upper surface of the base 1, and a driving gear 15 is arranged on the driving shaft of the motor 13;

[0041] The surface of the heating barrel 2 is provided with an inner ring 22 at the front and rear positions, and an outer ring 23 is rotatably installed on the outer surface of the inner ring 22. The front outer ring 23 is placed on the front support seat 12, and the rear outer ring 23 is placed on the rear support seat 13. A circular driven gear ring 24 is provided in the middle position of the surface of the heating barrel 2, and the driving gear 15 meshes with the driven gear ring 24. In this way, the rotation of the driving gear 15 can drive the driven gear ring 24 to rotate, and the heating barrel 2 rotates accordingly;

[0042] The inner wall of the heating barrel 2 is provided with a spiral electric heating tube 24, a front bracket 3 is provided at the front position inside the heating barrel 2, a center beam 31 is horizontally provided between the front bracket 3 and the right side wall of the heating barrel 2, and the center beam 31 is located at the central axis position of the heating barrel 2. When the electric heating tube 24 is powered on, the inside of the heating barrel 2 can be heated;

[0043] Four material plates 32 are evenly spaced on the surface of the center beam 31, and a plurality of through holes 33 are arranged on the surface of the material plates 32. The side of the material plates 32 away from the center beam 31 is close to the electric heating tube 34, so that most of the aluminum ash can fall on the material plates 32 during the rotation of the heating barrel 2.

[0044] The left end of the heating barrel 2 is open, and a barrel cover 21 is hingedly connected to the open position of the left end of the heating barrel 2. A circular sealing gasket 212 is provided on the inner surface of the barrel cover 21. The outer diameter of the sealing gasket 212 is consistent with the inner diameter of the opening of the heating barrel 2. A handle 211 is provided on the front of the barrel cover 21 away from its rotating shaft. Holding the handle 211, it is convenient to open or close the barrel cover 21. The sealing gasket 212 can enhance the sealing between the barrel cover 21 and the heating barrel 2, so that aluminum ash is not easy to overflow.

[0045] Four material plates 32 are evenly distributed around the surface of the central beam 31 , and the material plates 32 are arranged along the length direction of the central beam 31 , so that the aluminum ash can always hit the material plates 32 during the falling process.

[0046] The plurality of through holes 33 are evenly arranged at equal intervals along the length direction and the width direction of the material plate 32 .

[0047] A plurality of blocks 35 are evenly arranged at equal intervals on the surface of the electric heating tube 34 along the spiral direction of the electric heating tube 34 , and the blocks 35 are mounted on the inner wall of the heating barrel 2 by bolts.

[0048] Two conductive joints 27 are symmetrically arranged at the central position of the right side of the heating barrel 2. The two conductive joints 27 are respectively connected to the positive pole and the negative pole of the electric heating tube 34. The two conductive joints 27 are connected to an external power source and can supply power to the electric heating tube 34.

[0049] A temperature transmitter 25 is provided at the front position of the surface of the heating barrel 2. The detection rod of the temperature transmitter 25 is located inside the heating barrel 2. By observing the instrument of the temperature transmitter 25, the ambient temperature inside the heating barrel 2 can be known in real time. An exhaust pipe 26 connected to the inside of the heating barrel 2 is provided above the right side of the heating barrel 2. A one-way valve 261 is installed on the exhaust pipe 26. The gas inside the heating barrel 2 can be discharged through the exhaust pipe 26 to ensure the safety of the inside of the heating barrel 2. A hook 28 is provided in the middle position of the right side of the heating barrel 2.

[0050] The front bracket 3 is in a "cross" shape, and a plug hole is provided in the middle of the front bracket 3, and the front end of the center beam 31 is plugged into the plug hole.

[0051] Rotatable rollers are provided in the middle of the front support seat 12 and the rear support seat 13 via a rotating shaft, and the outer ring 23 is in contact with the rollers.

[0052] A method for using a denitrification device based on aluminum ash comprises the following steps:

[0053] S1, open the barrel cover 21, send the aluminum ash into the heating barrel 2 through the left end opening of the heating barrel 2, and close the barrel cover 21;

[0054] S2, connect the conductive joint 27 to an external power source, energize the electric heating tube 34 to heat the aluminum ash added to the barrel 2, and observe the temperature displayed on the temperature transmitter 25 in real time;

[0055] S3, the motor 14 works, driving the driving gear 15 to rotate, the driving gear 15 drives the driven gear ring 24 to rotate, and the heating barrel 2 rotates slowly accordingly, and the aluminum ash in the heating barrel 2 can be naturally dispersed to be fully heated;

[0056] S4, after calcination is completed and naturally cooled, the hoisting equipment is hung on the hook 28, the heating barrel 2 is hoisted to an inclined state, the barrel cover 21 is opened, and the calcined aluminum ash flows out from the mouth of the heating barrel 2.

[0057] In summary: aluminum ash is fed into the heating barrel 2 from the mouth of the heating barrel 2, and then the barrel cover 21 is closed, and the two conductive joints 27 are connected to an external power source, so that the electric heating tube 24 is heated by conduction, and the barrel cover 21 and the mouth of the heating barrel 2 are provided with a sealing gasket 212, so that the aluminum ash in the heating barrel 2 will not overflow, and the electric heating tube 24 can quickly raise the temperature inside the heating barrel 2 to a suitable temperature;

[0058] The temperature inside the heating barrel 2 can be known in real time through the temperature transmitter 25, so that the working frequency of the electric heating tube 34 can be controlled to control the calcination temperature in the heating barrel 2; a plurality of rollers are arranged between the inner ring 22 and the outer ring 23, so that the inner ring 22 and the outer ring 23 form a bearing structure, and the heating barrel 2 can rotate relative to the outer ring 23. When the motor 14 is working, the driving gear 15 can drive the driven gear ring 24 to rotate, so that the heating barrel 2 can rotate slowly;

[0059] The aluminum ash in the heating barrel 2 can rotate slowly with the heating barrel 2, and the aluminum ash is located in the four material plates 32, so that when the aluminum ash and the material plates 32 rotate, part of the aluminum ash can stay in the material plates 32 respectively, and the aluminum ash can fall through the through holes 33, and the four material plates 32 can play a role in separating the aluminum ash, so that the aluminum ash can be fully and freely dispersed during the rotation process, so that the aluminum ash can fully exchange heat with the electric heating tube 34;

[0060] The aluminum ash at each position can be evenly heated to a suitable calcination temperature range. When the aluminum ash reaches 700 degrees Celsius, the nitrogen in the aluminum ash begins to separate. When the temperature of the aluminum ash continues to rise to 900-1000 degrees Celsius, the nitrogen is completely separated from the aluminum ash. The generated nitrogen can be discharged from the exhaust pipe 26.

[0061] A one-way valve 261 is provided on the exhaust pipe 26 to protect the heating barrel 2. When the heating barrel 2 is heating, the air inside the heating barrel 2 can be discharged smoothly from the exhaust pipe 26, thus avoiding danger caused by excessive air pressure in the heating barrel 2.

[0062] When the aluminum ash is calcined, the heating barrel 2 and the aluminum ash inside cool to the natural temperature. The worker holds the handle 211 and opens the barrel cover 21, and uses the lifting equipment to hang it on the hook 28 and lift it up. Since the front support seat 12 and the rotating seat 11 are rotatably connected, the tail of the heating barrel 2 can be lifted up, and the entire heating barrel 2 is tilted, and the mouth of the heating barrel 2 faces downward, which is convenient for pouring out the aluminum ash after calcination inside; after the aluminum ash is fully and evenly calcined, there is almost no nitrogen element inside, so the harmless treatment of the aluminum ash is achieved.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A denitrification device based on aluminum ash, characterized in that: The heating device comprises a base (1) and a heating barrel (2), wherein a rotating seat (11) is arranged at the front position of the upper surface of the base (1), a rear supporting seat (13) is arranged at the rear position of the upper surface of the base (1), a front supporting seat (12) is hingedly connected to the upper surface of the rotating seat (1), a motor (14) is arranged at the center of the upper surface of the base (1), and a driving gear (15) is arranged on the driving shaft of the motor (13); The surface of the heating barrel (2) is provided with an inner ring (22) at the front and rear positions, and an outer ring (23) is rotatably mounted on the outer surface of the inner ring (22). The outer ring (23) is placed on the front support seat (12) at the front, and on the rear support seat (13) at the rear. A circular driven gear ring (24) is provided at the middle position of the surface of the heating barrel (2), and the driving gear (15) meshes with the driven gear ring (24); The inner wall of the heating barrel (2) is provided with a spiral electric heating tube (24); a front bracket (3) is provided at the front position inside the heating barrel (2); a center beam (31) is horizontally provided between the front bracket (3) and the right side wall of the heating barrel (2); the center beam (31) is located at the central axis position of the heating barrel (2); Four material plates (32) are evenly arranged at equal intervals on the surface of the central beam (31), and a plurality of through holes (33) penetrating the material plates (32) are arranged on the surface of the material plates (32). One side of the material plates (32) away from the central beam (31) is close to the electric heating pipe (34).

2. A denitrification device based on aluminum ash according to claim 1, characterized in that: The left end of the heating barrel (2) is open, and a barrel cover (21) is hingedly connected to the left open position of the heating barrel (2). The inner surface of the barrel cover (21) is provided with a circular ring-shaped sealing gasket (212), and the outer diameter of the sealing gasket (212) is consistent with the inner diameter of the open opening of the heating barrel (2). A handle (211) is provided on the front of the barrel cover (21) away from its rotation axis.

3. A denitrification device based on aluminum ash according to claim 1, characterized in that: The four material plates (32) are evenly distributed around the surface of the central beam (31), and the material plates (32) are arranged along the length direction of the central beam (31).

4. A denitrification device based on aluminum ash according to claim 3, characterized in that: The plurality of through holes (33) are evenly arranged at equal intervals along the length direction and the width direction of the material plate (32).

5. The denitrification equipment based on aluminum ash according to claim 1 is characterized in that: The surface of the electric heating tube (34) is evenly and evenly provided with a plurality of clamping blocks (35) at equal intervals along the spiral direction of the electric heating tube (34), and the clamping blocks (35) are mounted on the inner wall of the heating barrel (2) by means of bolts.

6. A denitrification device based on aluminum ash according to claim 1, characterized in that: Two conductive joints (27) are symmetrically arranged at the central position of the right side of the heating barrel (2), and the two conductive joints (27) are respectively connected to the positive electrode and the negative electrode of the electric heating pipe (34).

7. The denitrification equipment based on aluminum ash according to claim 1 is characterized in that: A temperature transmitter (25) is arranged at the front position of the surface of the heating barrel (2); a detection rod of the temperature transmitter (25) is located inside the heating barrel (2); an exhaust pipe (26) connected to the inside of the heating barrel (2) is arranged above the right side of the heating barrel (2); a one-way valve (261) is installed on the exhaust pipe (26); and a hook (28) is arranged in the middle position of the right side of the heating barrel (2).

8. The denitrification equipment based on aluminum ash according to claim 1 is characterized in that: The front bracket (3) is in a "cross" shape, and a plug hole is provided in the middle of the front bracket (3), and the front end of the center beam (31) is plugged into the plug hole.

9. The denitrification equipment based on aluminum ash according to claim 1, characterized in that: A rotatable roller is disposed in the middle of the front support seat (12) and the rear support seat (13) via a rotating shaft, and the outer ring (23) is in contact with the roller.

10. A method for using the aluminum ash-based denitrification equipment according to any one of claims 1 to 9, characterized in that: The steps include: S1, open the barrel cover (21), send the aluminum ash into the heating barrel (2) through the left end opening of the heating barrel (2), and close the barrel cover (21); S2, connecting the conductive joint (27) to an external power source, energizing the electric heating tube (34) to heat the aluminum ash added to the barrel (2), and observing the temperature displayed on the temperature transmitter (25) in real time; S3, the motor (14) works, driving the driving gear (15) to rotate, the driving gear (15) drives the driven gear ring (24) to rotate, and the heating barrel (2) rotates slowly accordingly, and the aluminum ash in the heating barrel (2) can be naturally dispersed to be fully heated; S4, after calcination is completed and the aluminum ash is cooled naturally, the hoisting equipment is hung on the hook (28), the heating barrel (2) is hoisted to an inclined state, the barrel cover (21) is opened, and the calcined aluminum ash flows out from the mouth of the heating barrel (2).

Images