CN218665543U - Improved aluminum ion recovery device in aluminum waste water - Google Patents
Improved aluminum ion recovery device in aluminum waste water Download PDFInfo
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- CN218665543U CN218665543U CN202222811072.7U CN202222811072U CN218665543U CN 218665543 U CN218665543 U CN 218665543U CN 202222811072 U CN202222811072 U CN 202222811072U CN 218665543 U CN218665543 U CN 218665543U
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Abstract
The utility model discloses an aluminium ion recovery unit in improvement formula aluminum product waste water, include: recovery unit, solid awl nozzle, water curtain sleeve, overflow fill, reverse umbrella type spiral mixing aerator and manger plate ring, solid awl nozzle withThe waste water inlet is conducted and connected, the water curtain sleeve is arranged below the solid cone nozzle, the overflow hopper is arranged at the lower position in the recovery device, the inverted umbrella-shaped rotary mixing aerator is arranged in the overflow hopper, and the input end of the inverted umbrella-shaped rotary mixing aerator is connected with CO 2 The inner side wall of the recovery device is provided with a water retaining ring above the overflow hopper, and the water retaining ring can block CO 2 Rising and directing the wastewater into the overflow hopper for wastewater and CO 2 The reaction was concentrated in an overflow funnel. The utility model discloses can carry out high-efficient recycle to aluminium waste residue, aluminium waste water, avoid appearing the problem that crystallization wall built-up and aeration head blockked up in the recovery process simultaneously.
Description
Technical Field
The utility model relates to an industrial wastewater handles the field, especially relates to an aluminium ion recovery unit in improvement formula aluminum product waste water.
Background
The aluminum product yield in China accounts for 70% of the total world production, the aluminum alloy and the product are widely manufactured and distributed, and a plurality of enterprises exist. The alkaline etching is the most common method in the surface treatment process of aluminum products, the alkaline etching refers to the process of etching the aluminum in an alkaline solution, and the wastewater discharged after the surface of the aluminum after the alkaline etching is cleaned is alkaline etching cleaning wastewater. The aluminum content in the wastewater reaches 2000-4000mg/L, and the wastewater mainly contains sodium aluminate, sodium hydroxide and trace additives, and has strong basicity and corrosivity. The total amount of the alkaline etching cleaning wastewater is large, the solid waste production amount is large, and the treatment cost is high.
At present, waste water of each procedure of aluminum material surface treatment is discharged after reaching standards after being mixed, simultaneously, a large amount of aluminum-containing solid waste sludge is generated, commonly called caustic sludge or aluminum mud, and the metal component with large content in the aluminum mud is aluminum. Because inorganic acid or lime is used for neutralizing and adjusting the pH value in the wastewater treatment process, the components are complex, the alkaline residue recycling technology is complex, and the alkaline residue can only be safely treated as solid waste, so that the aluminum resource waste is caused, and the solid waste pollution is serious.
In order to solve the problem of recovering aluminum material waste water, the applicant discloses a device for recovering aluminum ions in aluminum material waste water in a patent CN202020427612.X, which introduces CO into alkaline etching cleaning waste water 2 Formation of crystalline Al (OH) 3 Precipitating to recover aluminum ions. The device comprises an alkaline etching cleaning wastewater pipeline and CO 2 The device comprises an air duct, an acid cleaning duct, a sewage discharge duct, a conical aeration mesh enclosure, an air stripper, a safety valve, a pH meter and a flange liquid level meter. The alkaline etching cleaning wastewater can be introduced into a recovery device, and CO is introduced into the recovery device at the same time 2 Controlling the pH value to be 9.5-10.5 in the reaction process, adjusting the water inflow, controlling the reaction time to be 10-20 min, and containing a large amount of crystalline Al (OH) after the reaction 3 The suspension of (a) flows to a sedimentation tank.
But some disadvantages of the utility model are as follows: 1. the crystallized Al (OH) generated in the reaction process of the aluminum ion recovery device designed above 3 The wall is easy to hang, and the recovery of aluminum ions is influenced. 2. The conical aerator is easy to block and carry out uneven aeration, and the long-term use and the treatment effect of the recovery device are influenced.
Therefore, the problems of crystallization wall hanging and nozzle blockage are solved, and the applicant designs an improved aluminum ion recovery device in aluminum waste water on the basis of the previous patent.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the embodiment of the utility model provides an aluminium ion recovery unit in improvement formula aluminum product waste water, include: the device comprises a recovery device, and a solid cone nozzle, a water curtain sleeve, an overflow hopper, an inverted umbrella-shaped rotary mixing aerator and a water retaining ring which are arranged in the recovery device.
The top of the recovery device is provided with a wastewater inlet, the bottom of the recovery device is provided with a wastewater outlet, the solid cone nozzle is arranged above the interior of the recovery device and is in conduction connection with the wastewater inlet, the water curtain sleeve is arranged below the solid cone nozzle, so that wastewater sprayed by the solid cone nozzle falls on the water curtain sleeve to form a water curtain, the overflow hopper is arranged at the lower position in the recovery device, the bottom of the overflow hopper is connected with a crystal outlet, the inverted umbrella type rotary mixing aerator is arranged inside the overflow hopper, and the input end of the inverted umbrella type rotary mixing aerator is connected with CO 2 The inner side wall of the recovery device is provided with a water retaining ring above the overflow hopper, and the water retaining ring can block CO 2 Rising and directing the wastewater into the overflow hopper for wastewater and CO 2 The reaction is concentrated in an overflow hopper.
Wherein, the chassis of the inverted umbrella type rotary mixing aerator is in an inverted umbrella shape, and the chassis is provided with uniformly distributed saw teeth and a plurality of bottom holes.
The middle part of the water retaining ring is provided with a water retaining ring through hole, and the diameter of the water retaining ring through hole is smaller than that of the overflow hopper.
Wherein, the top of the recovery device is also provided with an exhaust valve.
Wherein, single flange level gauge and pH meter are equipped with to recovery unit bottom.
Implement the embodiment of the utility model provides a, following beneficial effect has: (1) avoid crystallization wall built-up, the utility model discloses a solid awl nozzle makes waste water at the inside water curtain that forms top-down of recovery unit with the water curtain sleeve, makes CO through the manger plate ring simultaneously 2 Most of the reaction with the wastewater is concentrated in the overflow hopper, so that the wastewater is greatly prevented from contacting CO on the inner wall of the recovery device 2 And the reaction produces crystallization resulting in a problem of wall build-up. (2) The aeration is even and difficult for blocking, the utility model discloses an inverted umbrella type mixes aerator soon for the aeration is more even and abundant, has improved CO 2 The utilization rate of the aeration head is higher, and the aeration head is less prone to blockage.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a schematic view of the internal structure of the present invention;
fig. 3 is a schematic structural view of the water retaining ring of the present invention, wherein fig. (a) is a top view and fig. (B) is a front view;
fig. 4 is a front view of the water curtain sleeve and a bottom view of the inverted umbrella type rotary mixing aerator of the present invention.
Reference numerals:
the device comprises a recovery device 1, a wastewater inlet 11, a wastewater outlet 12, an exhaust valve 13, a single-flange liquid level meter 14 and a pH meter 15; a solid cone nozzle 2; a water curtain sleeve 3; overflow 4, crystal outlet 41; reverse umbrella type rotary mixing aerator 5, CO 2 Air inlet 51, saw teeth 52, bottom hole 53; water retaining ring 6, water retaining ring through-hole 61.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, the utility model relates to an improved aluminum ion recovery device in aluminum waste water, which comprises a recovery device 1 and a solid cone nozzle 2, a water curtain sleeve 3, an overflow hopper 4, an inverted umbrella type rotary mixing aerator 5 and a water retaining ring 6 which are arranged inside the recovery device.
The top of the recovery device 1 is provided with a wastewater inlet 11, the bottom of the recovery device is provided with a wastewater outlet 12, the solid cone nozzle 2 is arranged on the upper part of the recovery device 1 and is connected with the wastewater inlet 11 in a conduction mode, the water curtain sleeve 3 is arranged below the solid cone nozzle 2, and then alkaline etching cleaning wastewater can enter the recovery device 1 from the wastewater inlet 11 and is sprayed out from the solid cone nozzle 2, so that the water curtain sleeve 3 is fallen to form a water curtain from top to bottom.
Please refer to fig. 2 and 4, the water curtain sleeve 3 in this embodiment is fixedly connected to the inner wall of the recovery device 1 through connecting columns at two sides, and the water curtain sleeve 3 is erected below the solid cone nozzle.
The overflow hopper 4 is arranged at the lower position in the recovery device 1, the bottom of the overflow hopper 4 is connected with a crystal discharge port 41, the inverted umbrella-shaped rotary mixing aerator 5 is arranged in the overflow hopper 4, and the input end of the inverted umbrella-shaped rotary mixing aerator 5 is connected with CO 2 An air inlet 51, a water retaining ring 6 is arranged on the inner side wall of the recovery device 1 at a position 200mm above the overflow hopper, and the water retaining ring 6 can block CO 2 Rises and guides the falling waste water into the overflow hopper 6, bringing the waste water and CO 2 The reaction is carried out with the concentration in the overflow 4.
As shown in fig. 2 and 3, a water retaining ring through hole 61 is formed in the middle of the water retaining ring 6, the diameter of the water retaining ring through hole 61 is smaller than that of the overflow hopper 5, and further, when wastewater falls from the water curtain sleeve 4, the wastewater can be blocked by the water retaining ring 6, and most of the wastewater flows into the overflow hopper 4 from the water retaining ring through hole 61 because the water retaining ring through hole 61 is smaller than that of the overflow hopper 4.
As shown in fig. 2 and 4, the inverted umbrella type rotary mixing aerator 5 has an inverted umbrella-shaped base plate, and the base plate is provided with uniformly distributed saw teeth 52 and a plurality of bottom holes 53, so that when CO is produced 2 When the gas enters the aerator, CO 2 The gas is cut by the multi-layer saw teeth 52 to form micro bubbles, so that the aeration is more sufficient, and the CO is greatly promoted 2 The utilization rate of the device is high, and meanwhile, the device has the characteristic of being not easy to block.
Preferably, the top of the recovery device 1 is further provided with an exhaust valve 13 and a pressure gauge, and when the pressure gauge measures that the pressure in the recovery device is too high, the pressure can be released through the exhaust valve 13.
Preferably, the bottom of the recovery device is provided with a single-flange liquid level meter 14 and a pH meter 15 which are respectively used for monitoring the liquid level value and the pH value inside the recovery device.
The use principle is as follows:
during the processing of aluminum materials, a great amount of Al with high added value can be generated in the alkaline etching tank 3+ However, the bath solution adopted by the alkaline etching is NaOH solution and organic acid sodium salt solution, and the organic acid sodium salt causes aluminum ions generated in the alkaline etching process to generate complexation with the aluminum ions so as to generate NaAlO 2 ,NaAlO 2 No or little hydrolysis occurs, so that the initial hydrolysis produces Al (OH) 3 The nuclei do not grow and, if they do, soft rather than hard precipitates occur.
Therefore, in order to recover Al (OH) of high purity 3 The utility model discloses a fill into CO to aluminium alkaline waste water 2 Gas, make CO 2 The gas is dissolved in water to generate hydrolysis reaction, the pH value is reduced, and simultaneously NaAlO 2 Hydrolysis reaction to generate crystal Al (OH) 3 And (4) precipitating.
When sodium metaaluminate reacts with carbon dioxide, when the adding amount of carbon dioxide is small, aluminum hydroxide and sodium carbonate are generated in the system, and when the adding amount of carbon dioxide is large, aluminum hydroxide precipitate and sodium bicarbonate are generated in the system. The chemical reaction formula is as follows:
when the adding amount of carbon dioxide is less:
2NaOH+CO 2 →Na 2 CO 3 +H 2 O
2NaAlO 2 +CO 2 +3H 2 O＝2Al(OH) 3 ↓+Na 2 CO 3
when the carbon dioxide is further added:
CO 2 +Na 2 CO 3 +H 2 O＝2NaHCO 3
during the use, alkaline etching washing waste water gets into recovery unit 1's inside from waste water inlet 11, and waste water inlet 11 is connected with solid awl nozzle 2, and alkaline etching washing waste water atomizes through solid awl nozzle 2, makes the waste water dispersion spout on the inner wall of the water curtain sleeve 3 of below and form top-down's water curtain, and the water curtain falls on the anchor ring of manger plate ring 6 and through manger plate ring through-hole 61 flows into in the overflow fill 4.
With CO 2 Gas passing through CO 2 The air inlet 51 is communicated with the reverse umbrella-shaped rotary mixing aerator 5, and the reverse umbrella-shaped rotary mixing aerator 5 uniformly disperses the airflow entering the recovery device 1, thereby ensuring that CO is absorbed 2 The gas can fully react with the waste water.
And the diameter of the water retaining ring through hole 61 of the water retaining ring 6 is smaller, and wastewater flows from the water retaining ringThe water curtain is also generated when the through holes 61 flow into the overflow hopper 4, and the water retaining ring 6 can block CO to a great extent 2 The gas rises towards the top of the recovery unit 1, causing wastewater and CO to rise 2 The reaction of the gas is concentrated in the overflow hopper 4, which not only can improve the reaction efficiency, but also can greatly avoid the wastewater from contacting CO on the inner wall of the recovery device 1 2 And the reaction produces crystallization resulting in the problem of wall hanging.
After the reaction, al (OH) is formed 3 The solids are collected in overflow hopper 4 and discharged through the crystal discharge port 41.
The above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides an aluminium ion recovery unit in improvement formula aluminum product waste water which characterized in that includes: the device comprises a recovery device (1), and a solid cone nozzle (2), a water curtain sleeve (3), an overflow hopper (4), an inverted umbrella-shaped rotary mixing aerator (5) and a water retaining ring (6) which are arranged in the recovery device;
the top of the recovery device (1) is provided with a wastewater inlet (11), the bottom of the recovery device is provided with a wastewater outlet (12), the solid cone nozzle (2) is arranged above the interior of the recovery device (1) and is in conduction connection with the wastewater inlet (11), the water curtain sleeve (3) is arranged below the solid cone nozzle (2), so that the wastewater sprayed from the solid cone nozzle (2) falls on the water curtain sleeve (3) to form a water curtain, the overflow hopper (4) is arranged at the lower part of the interior of the recovery device (1), the bottom of the overflow hopper (4) is connected with a crystal outlet (41), the inverted umbrella type rotary mixing aerator (5) is arranged inside the overflow hopper (4), and the input end of the inverted umbrella type rotary mixing aerator (5) is connected with CO 2 The overflow device comprises an air inlet (51), a water retaining ring (6) is arranged above the overflow hopper (4), a water retaining ring through hole (61) is formed in the middle of the water retaining ring (6), and the diameter of the water retaining ring through hole (61) is smaller than that of the water retaining ring through holeThe diameter of the overflow hopper (4) and the water retaining ring (6) are used for buffering CO output by the reverse umbrella type rotary mixing aerator (5) 2 Rises and guides the wastewater flowing down from the water curtain sleeve to enter an overflow hopper (4).
2. The improved aluminum material wastewater aluminum ion recovery device as recited in claim 1, wherein the inverted umbrella type rotary mixing aerator (5) has an inverted umbrella shape with uniformly distributed saw teeth (52) and a plurality of bottom holes (53).
3. The improved aluminum product waste water aluminum ion recovery device as recited in claim 1, wherein the top of the recovery device (1) is further provided with an exhaust valve (13).
4. An improved aluminum material waste water aluminum ion recovery device as recited in claim 1, characterized in that the bottom of said recovery device (1) is provided with a single flange liquid level meter (14) and a pH meter (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222811072.7U CN218665543U (en) | 2022-10-24 | 2022-10-24 | Improved aluminum ion recovery device in aluminum waste water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222811072.7U CN218665543U (en) | 2022-10-24 | 2022-10-24 | Improved aluminum ion recovery device in aluminum waste water |
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| CN218665543U true CN218665543U (en) | 2023-03-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117660767A (en) * | 2024-01-31 | 2024-03-08 | 中国科学院过程工程研究所 | Method for recycling sodium vanadate from nickel-aluminum slag by adopting multi-section microbubbles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117660767A (en) * | 2024-01-31 | 2024-03-08 | 中国科学院过程工程研究所 | Method for recycling sodium vanadate from nickel-aluminum slag by adopting multi-section microbubbles |
| CN117660767B (en) * | 2024-01-31 | 2024-04-26 | 中国科学院过程工程研究所 | Method for recycling sodium vanadate from nickel-aluminum slag by adopting multi-section microbubbles |
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