What is the advantages of waste caustic recovery system for aluminum extrusion die cleaning?|Alkaline recovery unit

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What is the advantages of waste caustic recovery system for aluminum extrusion die cleaning?

　
What is the advantages of waste caustic recovery system for aluminum extrusion die cleaning?

The Working principle of waste caustic recovery system for aluminum extrusion die cleaning:

The waste caustic recovery system makes use of the amphoteric characteristics of aluminum hydroxide, that is, supersaturated sodium metaaluminate, which is decomposed into two parts under suitable conditions in the recovery system: the upper layer of sodium hydroxide and the lower layer of aluminum hydroxide. The sodium hydroxide liquid in the upper layer is returned to the caustic tank to continue to use, after the aluminum hydroxide is separated by the centrifuge, it is taken as a powdery by-product for selling. The recovery of sodium hydroxide can reach more than 50%. In the case of keeping the die etching in a good condition, the consumption of sodium hydroxide is greatly reduced. The waste alkaline solution recovery system is in dynamic equilibrium, that is, the Al3+ and NaOH in the caustic tank, and the aluminum hydroxide in the recovery system are in a balanced state.

Waste caustic recovery system has the following advantages:

1.The environmental protection benefit is remarkable

1.1 Achieve zero emission

Waste caustic recovery system can effectively treat the waste alkali liquor, so that the waste alkali liquor can realize zero discharge in the whole operation process. The traditional way of alkaline treatment is to directly discharge the waste alkaline into the wastewater treatment system, which will produce a large amount of waste residue and cause a heavy burden on the environment. The recycling system avoids the generation of waste residue and the additional discharge of wastewater, greatly reduces the negative impact on the surrounding soil, water and other environmental factors, and meets the current strict environmental requirements.

1.2 Reduce chemical pollution

The waste caustic recovery system does not need to add other chemicals to assist the reaction during operation. It uses the principle that aluminum ions (Al) are decomposed by adding water to produce aluminum hydroxide crystals to achieve the purpose of removing aluminum ions, avoiding the introduction of other chemical substances that may bring environmental pollution risks, reducing chemical pollution caused by improper use or residues of chemicals, and contributing to the maintenance of the clean and safe ecological environment.

2.Efficient recycling of resources

2.1 The waste caustic recovery system is recycled

The active free alkali, mainly sodium hydroxide, can be recovered from the waste alkali liquor of the die etching. The recovered sodium hydroxide can be returned to the die etching tanks to be continuously used for cleaning the aluminum profile extrusion die, thereby realizing the secondary utilization of the alkali liquor. Through this recycling mode, enterprises can significantly reduce the purchase of new alkali, reduce the cost of raw materials in alkali liquor, and ensure the continuous supply of alkali liquor in the production process, so as to ensure the stable and orderly development of production activities.

2.2 By-products create economic benefits

In the recycling process, aluminum hydroxide is produced as a by-product. Aluminum hydroxide is separated by centrifuges and other equipment into powder, which can be sold as a valuable by-product. This not only increases the income sources of enterprises, but also makes full use of the resources that might have been abandoned, further improves the resource utilization rate of the whole production process, and achieves a win-win situation of economic benefits and resource benefits.

3.Production cost is reduce

3.1 Reduce the use cost of alkali

Because the recovery system can recycle the alkali liquor, the dependence on newly purchased alkali raw materials such as flake alkali is greatly reduced. With the passage of time and the continuous production, the procurement cost saved by the reuse of alkali liquor is considerable, which directly reduces the cost of raw materials for enterprises and improves the profit margin of products.

3.2 Operation and maintenance cost is save

Stable operation and low failure rate: the recovery system is stable in operation and low in failure rate. Compared with some complex and failure-prone processing systems, the caustic recovery system can reduce the downtime caused by equipment failure, avoid the resulting production delay and increase in maintenance costs, and ensure the continuity and stability of production. It reduces the operation cost of the enterprise as a whole.

3.3 Low maintenance cost:

Because the system itself has few operation faults, the manpower, material resources and financial resources required for maintenance are relatively less, and there are no other high-cost consumables such as diaphragms and membrane tubes during the later maintenance of the equipment, so there is no need to frequently replace these consumable parts, which further saves the maintenance cost and reduces the cost burden of the enterprise.

3.4 Low cost of labor management:

In terms of personnel management, the caustic recovery system only needs one worker/day to manage, which greatly reduces the labor cost compared with similar equipment requiring a large number of managers, making the enterprise more streamlined and efficient in human resources investment.

4.The operation is simple and easy

4.1The process is simplified

The operation process of the whole caustic recovery system is relatively simple, and other chemicals are not additionally added, so that the operation link is simplified, the complexity of the operation and the potential error risk possibly caused by the complexity of the operation are reduced, and operators can smoothly operate the system without mastering too profound and complicated chemical professional knowledge and operation skills.

4.2Low requirements for personnel

Only one ordinary worker is needed to operate the system, which reduces the requirements for the professional skills of operators and facilitates the enterprise to be more flexible in the allocation and arrangement of human resources. At the same time, ordinary workers can complete slag discharging and other maintenance work in half a day, which shows that the maintenance work is relatively easy and will not have a greater impact on normal production, which further reflects the advantages of easy operation and maintenance of the system.

5.Wide application range

5.1The caustic recovery system can be continuously applied to aluminum profile extrusion die cleaning, and can also be applied to other related production area such as an aluminum alkali etching tank, acid water neutralization, so that the application range of the recovered alkali liquor is expanded, the utilization rate of the alkali liquor resource is improved, and a good synergistic effect can be formed in the use of the alkali liquor resource among different production processes in an enterprise. Optimize the overall allocation of production resources.

To sum up, the waste caustic recovery system, with its advantages in environmental protection, resource utilization, cost control, operation and application, has brought significant comprehensive benefits to aluminum profile production and other related enterprises, and has great popularization and application value.
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