Aluminum ash denitration reaction device and denitration method

Abstract

The application relates to the technical field of casting, in particular to an aluminum ash slag denitrogenation reaction device and a denitrogenation method, which comprise an outer shell, a stirring part, a storage part and the like. The stirring part comprises a shaft sleeve rotationally arranged in the outer shell and an output shaft connected to the other end of the shaft sleeve, the output shaft and the shaft sleeve form a telescopic structure to allow telescopic expansion and contraction, and blades are radially arranged on the output shaft. The storage part comprises an inner shell arranged coaxially with the shaft sleeve outside the output shaft, a plurality of groups of sealing pieces one and sealing pieces two are alternately and interval arranged along the axial path of the output shaft in the inner shell, the sealing pieces one and the sealing pieces two in the plurality of groups are matched with the inner shell to form water containing cavities and aluminum ash containing cavities which are alternately and interval arranged along the axial path, and notches corresponding to the blades are arranged on the sealing pieces two. The application changes the traditional single-layer structure, provides a multi-layer structure cavity for alternately and layering the aluminum ash and water, the contact area of the water and the aluminum ash is doubled, and the hydrolysis reaction is facilitated.

Description

Technical Field

[0001] This invention relates to the field of aluminum ash treatment technology, specifically to an aluminum ash slag denitrification reaction device and a denitrification method for the aluminum ash slag denitrification reaction device. Background Technology

[0002] Aluminum ash is a common waste in the aluminum industry, with a huge output. Its main sources are infusible inclusions, oxides, additives, and reaction products generated by physical and chemical reactions with additives that float on the surface of the molten aluminum during the smelting of aluminum and the production of aluminum alloys. It is generated in all production processes in which aluminum melts.

[0003] The aluminum ash denitrification reaction device is a stirring device for aluminum ash hydrolysis. It mainly uses the stirring device to promote full contact between aluminum ash and water so that water and nitrogen react to generate ammonia gas, thereby achieving denitrification. However, due to the one-time input of a large amount of aluminum ash and water, under the condition of a fixed container cross-sectional area, a large amount of aluminum ash and water will exhibit stratification, making stirring difficult and hindering hydrolysis. Summary of the Invention

[0004] This invention addresses the problem in existing technologies where, due to the simultaneous addition of large quantities of aluminum ash and water to a container with a fixed cross-sectional area, stratification occurs, making stirring difficult and hindering hydrolysis. The invention provides an aluminum ash slag denitrification reaction device and method, the specific technical solution of which is as follows:

[0005] The denitrification reaction device for aluminum ash slag includes:

[0006] outer shell;

[0007] The stirring part includes a bushing rotatably disposed on the outer casing and an output shaft connected to the other end of the bushing. The output shaft and the bushing form a telescopic structure to allow for extension and retraction. Blades extend radially from the output shaft.

[0008] And a storage section, the storage section including an inner housing coaxially sleeved outside the output shaft, the inner housing having several sets of sealing plates one and two alternately arranged along the axial path of the output shaft, the several sets of sealing plates one and two cooperate with the inner housing to form water cavities and aluminum ash cavities alternately arranged along the axial path, the sealing plate two having notches corresponding to the blades.

[0009] The output shaft is driven by an external force to move axially and change between a first state and a second state;

[0010] In the first state, the blade is inserted into the notch, and the water cavity and aluminum ash cavity separated by the sealing plate are not connected to each other;

[0011] In the second state, the blade is placed inside the aluminum ash cavity, and the water cavity is connected to the aluminum ash cavity through a notch.

[0012] As a further technical solution of the present invention, the blades are provided in at least two sets and are evenly distributed around the output shaft.

[0013] As a further technical solution of the present invention, a connecting plate is rotatably connected to the output shaft, a hydraulic push rod is installed on the outer shell, the output end of the hydraulic push rod is connected to the connecting plate, and the output direction of the hydraulic push rod is parallel to the output shaft.

[0014] As a further technical solution of the present invention, an aluminum ash channel and a water channel are also inserted into the outer shell. The aluminum ash channel and the water channel are both connected to the storage part. The aluminum ash channel includes a main channel one arranged parallel to the output shaft and a sub-channel one connected to the main channel one. The other end of the sub-channel one is connected to the water cavity. The water channel includes a main channel two arranged parallel to the output shaft and a sub-channel two connected to the main channel two. The other end of the sub-channel two is connected to the aluminum ash cavity.

[0015] As a further technical solution of the present invention, the output shaft is slidably sealed with both the first and second sealing plates.

[0016] As a further technical solution of the present invention, the inner shell includes two symmetrically arranged semicircular pieces, and a bidirectional lead screw is rotatably arranged inside the outer shell, with the two semicircular pieces rotatably connected to both sides of the bidirectional lead screw;

[0017] The bidirectional lead screw is driven to rotate by an external force and can drive the two semicircular pieces to switch between the mold opening state and the mold closing state.

[0018] In the open mold state, the two semicircular pieces are spaced apart and facing each other;

[0019] When the mold is closed, the two semicircular pieces are attached together to form a hollow cylinder.

[0020] As a further technical solution of the present invention, each of the two semicircular plates has a hanging lug extending radially outward on its mating surface, and the bidirectional lead screw is rotatably connected to the hanging lug of the semicircular plate.

[0021] As a further technical solution of the present invention, a number of support rings are arranged at intervals along the axial path of the outer edge of the output shaft;

[0022] In the open mold state, the support ring abuts against and supports the bottom walls of the first and second sealing pieces.

[0023] As a further technical solution of the present invention, the inner side of the semicircular piece is alternately provided with rib groove one and rib groove two along the axial path, the rib groove one corresponds to the sealing piece one, and the rib groove two corresponds to the sealing piece two;

[0024] In the mold-closed state, the first sealing piece is inserted into the first rib groove, and the second sealing piece is inserted into the second rib groove.

[0025] On the other hand, this application also provides a denitrification method for an aluminum ash denitrification reaction device, the specific steps of which are as follows:

[0026] S1, mold closing;

[0027] By driving the bidirectional lead screw to rotate, the two semicircular pieces can be driven to approach and fit together, so that sealing piece one is inserted into rib groove one and sealing piece two is inserted into rib groove two, thus completing the mold closing;

[0028] S2, Feeding;

[0029] The aluminum ash is fed into several water chambers simultaneously through the aluminum ash channel, and the aluminum ash is fed into several water chambers simultaneously through the water channel.

[0030] S3, mixing;

[0031] Start the hydraulic push rod. The output end of the hydraulic push rod drives the output shaft to move down into the second state, so that the water in the water chamber flows into the aluminum ash chamber through the notch, thus completing the mixing process.

[0032] S4, Stir;

[0033] Start the output motor, and the output end of the output motor drives the output shaft and blades to rotate and stir in the aluminum ash cavity to promote the reaction between aluminum ash and water.

[0034] S5, mold opening;

[0035] Restart the hydraulic push rod. The output end of the hydraulic push rod drives the output shaft to move upward and reset, driving the bidirectional lead screw to reverse, driving the two semicircular pieces to move away from each other, thus completing the mold opening.

[0036] The beneficial effects of this invention are as follows:

[0037] The aluminum ash denitrification reaction device changes the traditional single-layer structure and adopts a multi-layer structure cavity, which doubles the contact area between water and aluminum ash, thus facilitating the hydrolysis reaction.

[0038] The denitrification method of the aluminum ash denitrification reactor is to alternately layer aluminum ash and water, thereby doubling the contact area between water and aluminum ash, which is beneficial to the hydrolysis reaction. Attached Figure Description

[0039] Figure 1 A schematic diagram of the overall structure of the aluminum ash denitrification reaction device is shown.

[0040] Figure 2 A schematic diagram of the internal structure of the outer casing is shown;

[0041] Figure 3 A schematic diagram of the stirring section is shown;

[0042] Figure 4 The structural schematic diagrams of cover sheet one and cover sheet two are shown;

[0043] Figure 5 This diagram shows the structure after the sealing sheet 1, sealing sheet 2, and stirring unit are combined;

[0044] Figure 6 A schematic diagram of the mixing section and the storage section in the first state is shown;

[0045] Figure 7 A schematic diagram of the mixing section and the storage section in the second state is shown;

[0046] Figure 8 A schematic diagram of the inner shell in the mold-open state is shown.

[0047] Figure Descriptions: 100, Outer shell; 200, Stirring section; 210, Output motor; 220, Bushing; 230, Output shaft; 231, Blade; 232, Support ring; 240, Connecting plate; 250, Hydraulic push rod; 300, Storage section; 310, Inner shell; 311, Semicircular plate; 312, Rib groove one; 313, Rib groove two; 314, Bidirectional lead screw; 315, Guide rod; 320, Sealing plate one; 330, Sealing plate two; 331, Notch; 340, Water chamber; 350, Aluminum ash chamber; 400, Aluminum ash channel; 410, Main channel one; 420, Sub-channel one; 500, Water channel; 510, Main channel two; 520, Sub-channel two. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0049] In existing technologies, when a large amount of aluminum ash and water are added at once, the large amount of aluminum ash and water will separate into layers, making stirring difficult and hindering hydrolysis under a fixed cross-sectional area. This application provides a novel cavity structure that divides a cavity with a fixed cross-sectional area into several sub-cavities along the height direction, so that the aluminum ash and water are evenly distributed in these sub-cavities, thereby increasing the contact area several times and improving the hydrolysis efficiency.

[0050] Figure 1 A schematic diagram of the overall structure of the aluminum ash denitrification reaction device is shown. Figure 2 A schematic diagram of the internal structure of the outer casing 100 is shown; Figure 1 and Figure 2The aluminum ash denitrification reaction device includes an outer shell 100, a stirring section 200 rotatably disposed in the middle of the outer shell 100, and a storage section 300 coaxially disposed outside the stirring section 200. An aluminum ash channel 400 and a water channel 500 are also inserted inside the outer shell 100, and both the aluminum ash channel 400 and the water channel 500 are connected to the storage section 300. In actual use, aluminum ash is put into the storage section 300 through the aluminum ash channel 400, and water is put into the storage section 300 through the water channel 500. Then, the stirring section 200 is driven to rotate in the storage section 300 to realize the hydrolysis reaction between aluminum ash and water.

[0051] Figure 3 A schematic diagram of the stirring section 200 is shown; Figure 4 A schematic diagram of the structure of cover sheet 1 320 and cover sheet 2 330 is shown; Figure 5 A schematic diagram of the structure after the sealing sheet 320, the sealing sheet 330, and the stirring unit 200 are combined is shown; Figure 6 A schematic diagram of the stirring section 200 and the storage section 300 in the first state is shown; Figure 7 A schematic diagram of the structure of the stirring section 200 and the storage section 300 in the second state is shown; Figures 3-7In the mixing unit 200, an output motor 210, a bushing 220, and an output shaft 230 are sequentially connected along the axial direction. The output motor 210 is mounted on the outer casing 100, the bushing 220 is connected to the output end of the output motor 210, and the output shaft 230 and bushing 220 form a telescopic structure to allow for extension and retraction. The output motor 210, mounted on the outer casing 100, can drive the bushing 220 and output shaft 230 to rotate coaxially during startup. Because the bushing 220 and output shaft 230 allow for extension and retraction, the output shaft 230 can rise and fall relative to the bushing 220 when driven by an external force. In other words, the bushing 220 and output shaft 230 can rotate synchronously and move relative to each other axially. (The last sentence appears to be incomplete and possibly refers to a storage mechanism.) The part 300 includes an inner housing 310 coaxially sleeved outside the output shaft 230. Several sets of sealing plates 320 and 330 are alternately arranged along the axial path of the output shaft 230 within the inner housing 310. These sealing plates 320 and 330, in conjunction with the inner housing 310, form water cavities 340 and aluminum ash cavities 350 alternately spaced along the axial path. A blade 231 extends radially from the output shaft 230. A notch 331 corresponding to the blade 231 is provided on the sealing plate 330. The output shaft 230 is driven by an external force to move axially and transition between a first state and a second state. In the first state, the blade 231 is inserted into the notch 331, and the water cavities 340 and aluminum ash cavities 350 are spaced apart by the sealing plates 330. In the first state, the water and aluminum ash cavities are not interconnected. In the second state, the blade 231 is placed in the aluminum ash cavity 350, and the water cavity 340 is connected to the aluminum ash cavity 350 through the notch 331. Water is added to the water cavity 340, and aluminum ash is added to the aluminum ash cavity 350. At this time, the blade 231 is still inserted in the notch 331, so that the water cavity 340 and the aluminum ash cavity 350 are not interconnected. The output shaft 230 is driven to move downward, that is, the blade 231 moves downward with the output shaft 230 and enters the aluminum ash cavity 350 completely. The notch 331 is then released, and the water in the water cavity 340 can flow into the aluminum ash cavity 350 through the notch 331 to achieve mixing. Then the output motor 210 is started, which drives the output shaft 230 and the blade 231 to rotate, thereby mixing the aluminum ash cavity 350. The system achieves the hydrolysis reaction of aluminum ash and water within 0. By changing the traditional single-layer structure, a multi-layer structure cavity is adopted, which doubles the contact area between water and aluminum ash. At least two sets of blades 231 are provided, which are evenly distributed around the output shaft 230. This is to facilitate better stirring and mixing when the output shaft 230 rotates. It should be noted that the notch 331 mentioned above corresponds to the blades 231. That is to say, regardless of the number and distribution of blades 231, the notch 331 is always provided. A connecting plate 240 is rotatably connected to the output shaft 230. A hydraulic push rod 250 is installed on the outer shell 100. The output end of the hydraulic push rod 250 is connected to the connecting plate 240, and the output direction of the hydraulic push rod 250 is parallel to the output shaft 230.When the hydraulic push rod 250 is activated, its output end can drive the connecting plate 240 and the output shaft 230 to move up and down, ensuring stability after movement. The rotatable connection between the connecting plate 240 and the output shaft 230 will not affect the rotation of the output shaft 230. The aluminum ash channel 400 includes a main channel 410 parallel to the output shaft 230 and a sub-channel 420 connecting to the main channel 410. The other end of the sub-channel 420 is connected to the water chamber 340. The water channel 500 includes a main channel 510 parallel to the output shaft 230 and a sub-channel 510 connecting to the main channel 510. Sub-channel 520 of type 10 connects at one end to aluminum ash cavity 350. This connection refers to quantity correspondence: sub-channel 420 corresponds to the number of water cavities 340, and sub-channel 520 corresponds to the number of aluminum ash cavities 350. This allows water to be simultaneously added to several water cavities 340 via aluminum ash channel 400, and aluminum ash to be simultaneously added to several aluminum ash cavities 350 via water channel 500, facilitating material supply. The output shaft 230 is slidably sealed to both sealing plate 320 and sealing plate 330 to ensure a tight seal during relative movement.

[0052] Figure 8 A schematic diagram of the inner housing 310 in the mold-open state is shown; Figure 8 Combination Figure 3 as well as Figure 6The inner shell 310 includes two symmetrically arranged semicircular pieces 311. A bidirectional lead screw 314 is rotatably mounted inside the outer shell 100. The two semicircular pieces 311 are rotatably connected to both sides of the bidirectional lead screw 314. The bidirectional lead screw 314 is driven to rotate by an external force, which can drive the two semicircular pieces 311 to switch between an open mold state and a closed mold state. In the open mold state, the two semicircular pieces 311 are spaced apart and opposite each other; in the closed mold state, the two semicircular pieces 311 are pressed together to form a hollow cylinder. A motor is connected to one end of the bidirectional lead screw 314 to drive the bidirectional lead screw 314 to rotate, thereby causing the two semicircular pieces 311 to switch between an open mold state and a closed mold state. The two semicircular pieces 311 move in opposite directions. When they come into contact with each other, they form a closed mold, constituting a complete hollow cylinder. When the two semicircular pieces 311 move away from each other, they form an open mold, allowing the hydrolyzed aluminum ash to be removed for easy unloading. Each of the two semicircular pieces 311 has a hanging lug extending radially outward on its mating surface. A bidirectional lead screw 314 is rotatably connected to the hanging lug of the semicircular piece 311. A guide rod 315 passes through the other hanging lug of the semicircular piece 311 and is fixedly connected to the outer shell 100. The hanging lugs are used to prevent the bidirectional lead screw 314 from interfering with the cylindrical inner cavity and to guide the material. Rod 315 ensures the sliding trajectory of the semicircular piece 311; several sets of support rings 232 are spaced along the axial path of the output shaft 230. In the open mold state, the support rings 232 abut against and support the bottom walls of sealing piece 1 320 and sealing piece 2 330; the support rings 232 are used to support sealing piece 1 320 and sealing piece 2 330 to prevent sealing piece 1 320 and sealing piece 2 330 from sliding down, that is, sealing piece 1 320 and sealing piece 2 330 are both mounted on the support rings 232; rib groove 1 312 and rib groove 2 313 are alternately opened on the inner side of the semicircular piece 311 along the axial path. 312 corresponds to sealing piece 320, and rib groove 313 corresponds to sealing piece 330. In the mold-closed state, sealing piece 320 is inserted into rib groove 312, and sealing piece 330 is inserted into rib groove 313. By using rib groove 312 and rib groove 313 to restrict the position of sealing piece 320 and sealing piece 330, a relay force can be formed with the aforementioned support ring 232, maintaining the relative position of sealing piece 320 and sealing piece 330 with respect to the outer shell 100 regardless of whether it is in the first state, the second state, the mold-open state, or the mold-closed state, which is beneficial for repeated hydrolysis.

[0053] The denitrification method of the aluminum ash denitrification reactor, with specific steps as follows:

[0054] S1, mold closing;

[0055] By driving the bidirectional lead screw 314 to rotate, the two semicircular pieces 311 can be driven to approach and fit together, so that the sealing piece 1 320 is inserted into the rib groove 1 312 and the sealing piece 2 330 is inserted into the rib groove 2 313, thus completing the mold closing.

[0056] S2, Feeding;

[0057] The aluminum ash is simultaneously fed into several water chambers 340 through the aluminum ash channel 400, and simultaneously fed into several aluminum ash chambers 350 through the water channel 500.

[0058] S3, mixing;

[0059] Start the hydraulic push rod 250. The output end of the hydraulic push rod 250 drives the output shaft 230 to move down into the second state, so that the water in the water chamber 340 flows into the aluminum ash chamber 350 through the notch 331, thus completing the mixing.

[0060] S4, Stir;

[0061] Start the output motor 210. The output end of the output motor 210 drives the output shaft 230 and the blades 231 to rotate and stir in the aluminum ash cavity 350 to promote the reaction between aluminum ash and water.

[0062] S5, mold opening;

[0063] Restart the hydraulic push rod 250. The output end of the hydraulic push rod 250 drives the output shaft 230 to move upward and reset, drives the bidirectional lead screw 314 to reverse, and drives the two semicircular pieces 311 to move away from each other, thus completing the mold opening.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A nitrogen removal reaction device for aluminum ash slag, characterized in that, include: Outer shell (100); A stirring unit (200) includes a bushing (220) rotatably disposed on a housing (100) and an output shaft (230) connected to the other end of the bushing (220). The output shaft (230) and the bushing (220) form a telescopic structure to allow telescopic movement. Blades (231) extend radially from the output shaft (230). And a storage section (300), the storage section (300) includes an inner housing (310) coaxially sleeved outside the output shaft (230), a number of sets of sealing plates one (320) and sealing plates two (330) are alternately arranged in the inner housing (310) along the axial path of the output shaft (230), the number of sets of sealing plates one (320) and sealing plates two (330) cooperate with the inner housing (310) to form water cavity (340) and aluminum ash cavity (350) alternately spaced along the axial path, and the sealing plate two (330) has a notch (331) corresponding to the blade (231) on it; The output shaft (230) is driven by an external force to move axially and change between a first state and a second state; In the first state, the blade (231) is inserted into the notch (331), and the water cavity (340) and the aluminum ash cavity (350) separated by the sealing plate two (330) are not connected to each other; In the second state, the blade (231) is placed inside the aluminum ash cavity (350), and the water cavity (340) is connected to the aluminum ash cavity (350) through the notch (331).

2. The aluminum ash slag denitrification reaction device according to claim 1, characterized in that: The blades (231) are provided in at least two sets and are evenly distributed around the output shaft (230).

3. The aluminum ash slag denitrification reaction device according to claim 2, characterized in that: A connecting plate (240) is rotatably connected to the output shaft (230), and a hydraulic push rod (250) is installed on the outer casing (100). The output end of the hydraulic push rod (250) is connected to the connecting plate (240), and the output direction of the hydraulic push rod (250) is parallel to the output shaft (230).

4. The aluminum ash slag denitrification reaction device according to claim 3, characterized in that: An aluminum ash channel (400) and a water channel (500) are also inserted inside the outer casing (100). Both the aluminum ash channel (400) and the water channel (500) are connected to the storage section (300). The aluminum ash channel (400) includes a main channel (410) arranged parallel to the output shaft (230) and a sub-channel (420) connected to the main channel (410). The other end of the sub-channel (420) is connected to the water chamber (340). The water channel (500) includes a main channel (510) arranged parallel to the output shaft (230) and a sub-channel (520) connected to the main channel (510). The other end of the sub-channel (520) is connected to the aluminum ash chamber (350).

5. The aluminum ash slag denitrification reaction device according to claim 4, characterized in that: The output shaft (230) is slidably sealed with both the first sealing plate (320) and the second sealing plate (330).

6. The aluminum ash slag denitrification reaction device according to claim 5, characterized in that: The inner shell (310) includes two symmetrically arranged semicircular pieces (311), and a bidirectional lead screw (314) is rotatably arranged inside the outer shell (100). The two semicircular pieces (311) are rotatably connected to both sides of the bidirectional lead screw (314). The bidirectional lead screw (314) is driven to rotate by an external force and can drive the two semicircular pieces (311) to switch between the mold opening state and the mold closing state; In the open mold state, the two semicircular pieces (311) are spaced apart and opposite each other; In the mold-closed state, the two semicircular pieces (311) are attached together to form a hollow cylinder.

7. The aluminum ash slag denitrification reaction device according to claim 6, characterized in that: Both semicircular plates (311) have lugs that extend radially outward on their mating surfaces, and the bidirectional lead screw (314) is rotatably connected to the lugs of the semicircular plates (311).

8. The aluminum ash slag denitrification reaction device according to claim 6, characterized in that: The output shaft (230) is provided with several sets of support rings (232) at intervals along its axial path; In the open mold state, the support ring (232) abuts against and supports the bottom walls of the first sealing piece (320) and the second sealing piece (330).

9. The aluminum ash slag denitrification reaction device according to claim 6, characterized in that, The inner side of the semicircular piece (311) is alternately provided with rib groove one (312) and rib groove two (313) along the axial path. The rib groove one (312) corresponds to the sealing piece one (320), and the rib groove two (313) corresponds to the sealing piece two (330). In the mold-closed state, the sealing piece one (320) is inserted into the rib groove one (312), and the sealing piece two (330) is inserted into the rib groove two (313).

10. The denitrification method of the aluminum ash denitrification reaction device according to any one of claims 1-9, characterized in that, The specific steps are as follows: S1, mold closing; By driving the bidirectional lead screw (314) to rotate, the two semicircular pieces (311) can be driven to approach and fit together, so that the sealing piece one (320) is inserted into the rib groove one (312) and the sealing piece two (330) is inserted into the rib groove two (313), thus completing the mold closing; S2, Feeding; The aluminum ash is fed into several water chambers (340) simultaneously through the aluminum ash channel (400), and into several aluminum ash chambers (350) simultaneously through the water channel (500); S3, mixing; Start the hydraulic push rod (250), and the output end of the hydraulic push rod (250) drives the output shaft (230) to move down into the second state, so that the water in the water chamber (340) flows into the aluminum ash chamber (350) through the notch (331) to complete the mixing. S4, Stir; Start the output motor (210), and the output end of the output motor (210) drives the output shaft (230) and the blades (231) to rotate and stir in the aluminum ash cavity (350) to promote the reaction between aluminum ash and water; S5, mold opening; Restart the hydraulic push rod (250), the output end of the hydraulic push rod (250) drives the output shaft (230) to move up and reset, drives the bidirectional lead screw (314) to reverse, drives the two semicircular pieces (311) to move away from each other, and completes the mold opening.

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