Aluminum extrusion die cleaning with caustic soda recyling system

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Product Name:
Aluminum extrusion die cleaning with caustic soda recyling system
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Product Abstract:

This system consists of three parts: die cleaning device, waste caustic soda recovery device and waste alkali gas treatment device. The waste liquid produced after dies cleaning is collected in the waste alkali liquid collection tank, the pump send the waste caustic soda to the analysis reaction tower in the recovery device. The sodium metaaluminate compound formed in the spent caustic soda is hydrolyzed into powdery aluminum hydroxide and sodium hydroxide solution by using the hydrolysis method (also known as the Bayer method) to realize the secondary reuse of the liquid sodium hydroxide solution, reducing the using quantity of alkili product in the enterprise, and the by-product of aluminum hydroxide is collected and sold to create additional income for the enterprise. The waste causstic soda recovery system is controlled by PLC program to operate automatically, without worker monitoring in the whole process, and the recovery reaction does not require additional heating and refrigeration. The energy consumption of the system equipment is ultra-low, and the complete system does not generate waste alkali mist, realizing zero discharge of waste caustic soda.

Product Description

Aluminum extrusion die cleaning with caustic soda recyling system

1. Features of alkali recycling system of extrusion die：

1）Realize zero discharge of waste lye, it wont generate any additional waste water and waste residue.

Using the waste caustic soda recycling system of our die cleaning device can achieve zero discharge of waste liquid, and there is no need to discharge it into wastewater treatment to cause a large amount of waste residue. And the active free alkali can be recovered from the spent caustic soda to be used in the secondary die cleaning, and the aluminum hydroxide crystal separated from the spent caustic soda can be sold by secondary product, thereby it can reduce the loss cost of valuable metal aluminum.

2） Reduce the using quantity of alkali

The alkali recovered by die cleainging system, it is no only can continue to be used in die cleaning,but also be used in aluminum alkali etching tanks for acid water neutralization of anodizing line, thereby it can reduce the using quantity of caustic soda.

3） The operating cost is low

Our recycling system has few operating failures, less maintenance costs, fewer management personnel (only 1 man/day), and no other high-cost consumables in future maintenance, such as diaphragms and membrane tube...Our company will train the client operator to manage the system on-site until it can be used independently.

4）No need to add other chemicals

The operating principle of our recycling system is to use Al+3 to produce aluminum hydroxide crystals through hydrolysis to achieve the effect of removing Al+3. There is no need to add other chemical reactions throughout the whole process.

5）Easy operation, low maintenance rate, PLC automatic control operation

The PLC automatic control and continuous operation of our recycling system is easy to operate and low maintenance. It only needs one ordinary worker for half a day to remove aluminum slag.

2 Economic &social benefits of this System

Assuming that the customer's daily alkali liquid is 10T/day, the monthly operation is 30 days, and the annual operation is 11 months.

E1) Recovery value of caustic soda: 330T/year X RMB5000.00/T=1.65 million RMB

E2) By-product AL(OH), value: 500T/year X RMB1000.00/T=500,000RMB

E3) Total cost: 165,000 + 165,000 = 330,000RMB

With the alkali recovery device, aluminum ions and waste caustic do not need to be discharged into waste water, which can reduce the amount of waste residue generated by 10T of waste caustic discharge every day. The waste water treatment cost is RMB500.00/T, and the waste residue treatment cost is RMB100.00/T (according to ordinary waste residue treatment). The annual saving cost is: Chemical potion cost: 10T/day X 30 days X 11 months X RMB500.00/T=RMB165,000.00

for waste residue treatment expenses: 5T/day X 30 days X 11 months X RMB100.00 / T = RMB165,000.00

Note: Because the cost of wastewater treatment and waste residue treatment of each plant is different, it is calculated according to the market average. )

Based on the above: the annual economic benefits of the 10T/d caustic soda recovery unit: E1+E2+E3=1.65 million+500,000+330,000=RMB2.48 million

The runing cost of 10T/day system

Power cost statistics sheet

No.	Equipment name	Running power （KW）	Running time Hour/day	Power consumption (KWH/day)	Power price (RMB/KWH)	Total (RMB/day)
1	Feeding pump	2.2	24	52	0.6	31.2
2	Stirrer #1	12	24	288	0.6	172.8
3	Centrifuge	18.5	4	74	0.6	44.4
4	Stirrer #2	3	24	72	0.6	43.2
5	Stirrer #3	0.75	4	3	0.6	1.8
	Total					293.4

Labor cost P2=RMB200.00/day*1 person=RMB200.00/ton

(3) This operating cost does not include equipment depreciation, water, and compressed air.

Based on the above: the total operating cost of processing 10T die cleaning system with alkali reycling system per day: EP=P1+P2=RMB494.00/day,

the total annual operating cost is RMB 494.00 /day*30 days*11 months=RMB163000.00

Conclusion: The use of the caustic soda recovery device can produce economic value in one year = generating benefits - operating costs: 2.48 million-163,000 = RMB2.317 million.

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