CN-122007132-A - Wet harmless aluminum ash-aluminum resource collaborative recovery device

CN122007132ACN 122007132 ACN122007132 ACN 122007132ACN-122007132-A

Abstract

The invention discloses an aluminum ash wet harmless-aluminum resource collaborative recovery device, which relates to the field of aluminum resource recovery, and comprises a reaction kettle and a liquid injection cylinder, wherein the liquid injection cylinder is arranged on a sealing cover on the reaction kettle, the sealing cover is provided with the sealing cylinder, the part of the sealing cylinder, which is positioned at the bottom side of the sealing cover, is provided with a plurality of liquid injection pipes, the sealing cylinder is internally provided with a liquid injection assembly, the liquid injection assembly is used for quantitatively injecting alkaline liquid in the liquid injection cylinder into the reaction kettle through the plurality of liquid injection pipes for a plurality of times, the reaction kettle is provided with a pH value detector, the pH value detector is used for detecting the pH value of the liquid in the reaction kettle in real time and controlling the start and stop of a driving assembly according to the detection result, and the invention can ensure that alkali liquid is always fed in a mode closest to the stoichiometric ratio by adopting a closed-loop control mode of 'monitoring-feedback-execution', so that the problem of excessive or insufficient alkali liquid is fundamentally avoided.

Inventors

WANG TINGTING
ZHANG ZHENG
YU XUERU
XU HUI
BI JIANHUA

Assignees

南京市生态环境保护科学研究院

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. The wet harmless aluminum ash and aluminum resource collaborative recovery device comprises a reaction kettle (1) and a liquid injection cylinder (2) and is characterized in that the liquid injection cylinder (2) is arranged on a sealing cover (3) on the reaction kettle (1), a sealing cylinder (4) is arranged on the sealing cover (3), and a plurality of liquid injection pipes (5) are arranged on the part, located at the bottom side of the sealing cover (3), of the sealing cylinder (4); the sealing cylinder (4) is internally provided with a liquid injection assembly, and the liquid injection assembly is used for quantitatively injecting alkaline liquid in the liquid injection cylinder (2) into the reaction kettle (1) for a plurality of times through a plurality of liquid injection pipes (5); The bottom of the sealing cylinder (4) is provided with a swinging assembly, and the swinging assembly is used for swinging each liquid injection pipe (5) so as to achieve the effect of promoting alkaline liquid to be uniformly injected into the reaction kettle (1) and rapidly lifting the pH value of the liquid in the reaction kettle (1); the sealing cover (3) is provided with a driving assembly which is used for driving the liquid injection assembly and the swinging assembly to operate simultaneously; The reaction kettle (1) is provided with an air extraction assembly, and the air extraction assembly is used for continuously extracting gas in the reaction kettle (1) and keeping the inside of the reaction kettle (1) in a negative pressure state; The reaction kettle (1) is provided with a pH value detector (6), and the pH value detector (6) is used for detecting the pH value of liquid in the reaction kettle (1) in real time and controlling the start and stop of the driving assembly according to the detection result.
2. The wet harmless aluminum resource collaborative recovery device of aluminum ash is characterized in that the liquid injection assembly comprises a first piston (7) and a second piston (8) which are arranged in a sealing cylinder (4) in a sliding mode, the liquid injection cylinder (2) is communicated with the sealing cylinder (4), a one-way valve (9) is arranged at the joint of the liquid injection cylinder (2) and the sealing cylinder (4), a connecting pipe (10) is arranged between the liquid injection pipe (5) and the sealing cylinder (4), the connecting pipe (10) is communicated with the sealing cylinder (4) and is rotationally connected with the liquid injection pipe (5), and a limiting unit is arranged at the bottom of the first piston (7) and is used for limiting the maximum height and the minimum height of the first piston (7), wherein the upper surface of the limiting unit is located below a liquid inlet of the one-way valve (9) and a liquid outlet of the connecting pipe (10) respectively.
3. The wet harmless aluminum resource collaborative recovery device of aluminum ash is characterized in that the limiting unit comprises a first sliding rod (11) fixedly connected to the bottom end of a first piston (7), the first sliding rod (11) is in sliding connection with the sealing cylinder (4), a limiting block (12) is fixedly connected to the first sliding rod (11), the limiting block (12) is located at the bottom of the sealing cylinder (4), a first spring (13) is sleeved on the first sliding rod (11), and the upper end and the lower end of the first spring (13) are fixedly connected with the sealing cylinder (4) and the first sliding rod (11) respectively.
4. The wet harmless aluminum resource collaborative recovery device of aluminum ash is characterized in that the swinging assembly comprises a lantern ring (14) sleeved on the bottom side of a sealing cylinder (4), sliding frames (15) are symmetrically and fixedly connected to the left and right positions of the lantern ring (14), the sliding frames (15) are in sliding connection with a sealing cover (3), a plurality of first driving blocks (16) are fixedly connected to the lantern ring (14), the number of the first driving blocks (16) is equal to that of liquid injection pipes (5), a second driving blocks (17) are fixedly connected to the liquid injection pipes (5), and the second driving blocks (17) are in clearance fit with the first driving blocks (16) respectively.
5. The wet harmless aluminum resource collaborative recovery device of aluminum ash according to claim 4 is characterized in that the first driving block (16) is in a U-shaped cross arrangement, the second driving block (17) is vertically arranged on a rotating shaft opposite to the liquid injection pipe (5) and connected with the pipe (10), and the part of the second driving block (17) matched with the driving block is in a round rod shape.
6. The wet harmless aluminum resource collaborative recovery device of aluminum ash is characterized in that the driving assembly comprises a first fixing frame (18) fixed on a sealing cover (3), the liquid injection cylinder (2) is fixedly connected with the first fixing frame (18), a first screw rod (19) is fixedly connected to the upper end of the second piston (8), a driving frame (20) is sleeved on the first screw rod (19), an adjusting ring (21) is rotatably connected to the driving frame (20), the adjusting ring (21) is in threaded connection with the first screw rod (19), air cylinders (22) are symmetrically arranged at front and rear positions on the driving frame (20), the air cylinders (22) are fixedly connected with the first fixing frame (18) and the telescopic ends of the air cylinders (22) are fixedly connected with the driving frame (20), a second fixing frame (23) is fixedly connected to the sealing cover (3), and a reciprocating assembly is arranged on the second fixing frame (23) and is used for driving two sliding frames (15) to reciprocate when the driving frame (20) moves relative to the first piston (7).
7. The wet harmless aluminum resource collaborative recovery device of aluminum ash as claimed in claim 6 is characterized in that a vertical chute is formed in the first screw rod (19) and a driving frame (20) is in sliding connection with the vertical chute in the first screw rod (19), and the first screw rod (19) has self-locking property.
8. The wet harmless aluminum resource collaborative recovery device of aluminum ash is characterized in that the reciprocating assembly comprises a second sliding rod (24) symmetrically fixed at the left and right positions of the first piston (7), the second sliding rod (24) penetrates through the second piston (8) and is in sealing sliding connection with the second piston (8), a second screw rod (25) is rotatably connected to the upper end of the second sliding rod (24), the second screw rod (25) penetrates through the driving frame (20) and is in threaded connection with the driving frame (20), the second screw rod (25) does not have self-locking property, a transmission unit is arranged at the upper end of the second screw rod (25), and the transmission unit is used for driving the sliding frame (15) to slide up and down when the second screw rod (25) rotates.
9. The wet harmless aluminum resource collaborative recovery device of aluminum ash is characterized in that the transmission unit comprises a sliding plate (26) vertically and slidably connected to a second fixing frame (23), belt pulleys (27) are rotatably connected to the left and right positions of the sliding plate (26), a belt (28) is connected between the two belt pulleys (27) in a transmission mode, a second screw rod (25) is fixedly connected with one belt pulley (27), a telescopic shaft (29) is fixedly connected to the bottom end of the other belt pulley (27), a first bevel gear (30) is fixedly connected to the bottom end of the telescopic shaft (29), a second bevel gear (31) is meshed with the first bevel gear (30), a rotary table (32) is fixedly connected to the second bevel gear (31), the first bevel gear (30) and the second bevel gear (31) are rotatably connected with the fixing frame, a connecting rod (33) is rotatably connected to the upper edge position of the rotary table (32), and the bottom end of the connecting rod (33) is rotatably connected with the sliding frame (15).
10. The wet harmless aluminum ash and slag-aluminum resource collaborative recovery device disclosed by claim 1 is characterized in that the air extraction assembly comprises an air extraction pump (35) arranged on the outer side surface of the reaction kettle (1), the air extraction pump (35) is communicated with the inner cavity of the reaction kettle (1), the air outlet end of the air extraction pump (35) is fixedly connected with an air pipe (36), and a stirring rod (34) is arranged in the reaction kettle (1).

Description

Wet harmless aluminum ash-aluminum resource collaborative recovery device Technical Field The invention relates to the technical field of aluminum resource recovery, in particular to an aluminum ash wet harmless-aluminum resource collaborative recovery device. Background The aluminum ash is a dangerous solid waste generated in the aluminum smelting and processing process, contains available metal aluminum, aluminum oxide and other resources, and also contains harmful components such as aluminum nitride, fluoride, chloride and the like. Harmless treatment and resource recovery are necessary requirements for sustainable development of industry. At present, the treatment modes of the aluminum ash mainly comprise safe landfill, fire recovery, wet recovery and the like. Among them, wet treatment processes, particularly alkaline leaching processes, are attracting attention because of their relatively mild reaction conditions and efficient recovery of aluminum resources. However, the existing wet alkaline leaching process and device still have a plurality of obvious defects in practical industrialized application, namely 1, rough reaction control and safety and environmental risks, namely, when metal aluminum in aluminum ash and aluminum nitride are contacted with alkali liquor, a large amount of hydrogen and ammonia gas can be instantaneously generated at the initial stage of the reaction, so that the pressure and the temperature in the reaction kettle are rapidly increased, and splashing, groove overflow and even safety accidents are easily caused. Meanwhile, the severe reaction also causes harmful gases to be easy to escape, and huge pressure is caused to the operating environment and the tail gas treatment system. 2. The control of the technological parameters is inaccurate, and the economical efficiency is poor, and the traditional intermittent alkaline leaching technology usually adopts a mode of adding alkaline solution at one time or simply in batches. Because of complex components and large fluctuation of aluminum ash, the empirical addition mode is extremely easy to cause two adverse conditions, namely incomplete alkali liquor addition, low resource recovery rate, hidden danger of residual active components in subsequent treatment, waste of chemical reagents caused by excessive alkali liquor addition, increase of treatment cost, and increase of difficulty and cost of neutralization and wastewater treatment due to overhigh free alkali in subsequent solutions. 3. The mixing efficiency is low, the reaction period is long, and if the alkali liquor can not be rapidly and uniformly mixed with the slurry in the reaction kettle during the addition, the local area with too high or too low pH value is easy to generate. This may not only exacerbate side reactions and affect the purity of the target product, but also result in a reduction in overall reaction rate, requiring longer reaction times to achieve the desired leaching rate, reducing the unit capacity of the device. Disclosure of Invention The invention aims to provide a wet harmless aluminum ash-aluminum resource collaborative recovery device for solving the problems in the background technology. The technical scheme is that the wet harmless aluminum ash-aluminum resource collaborative recovery device comprises a reaction kettle and a liquid injection cylinder, wherein the liquid injection cylinder is arranged on a sealing cover on the reaction kettle, the sealing cover is provided with a sealing cylinder, and a plurality of liquid injection pipes are arranged on the part of the sealing cylinder, which is positioned at the bottom side of the sealing cover; The sealing cylinder is internally provided with a liquid injection assembly, and the liquid injection assembly is used for quantitatively injecting alkaline liquid in the liquid injection cylinder into the reaction kettle for a plurality of times through a plurality of liquid injection pipes; the bottom of the sealing cylinder is provided with a swinging assembly which is used for swinging each liquid injection pipe to achieve the effect of promoting alkaline liquid to be uniformly injected into the reaction kettle and rapidly improving the pH value of the liquid in the reaction kettle; the sealing cover is provided with a driving assembly which is used for driving the liquid injection assembly and the swinging assembly to operate simultaneously; the reaction kettle is provided with an air extraction assembly which is used for continuously extracting gas in the reaction kettle and keeping the reaction kettle in a negative pressure state; The reaction kettle is provided with a pH value detector, and the pH value detector is used for detecting the pH value of liquid in the reaction kettle in real time and controlling the start and stop of the driving assembly according to the detection result. The liquid injection assembly comprises a first piston and a second piston which are arranged in a sealing cylinde